diff --git a/boot.php b/boot.php
index 62b90aa2cd..837a507d5c 100644
--- a/boot.php
+++ b/boot.php
@@ -17,6 +17,8 @@
  * easily as email does today.
  */
 
+require_once('include/autoloader.php');
+ 
 require_once('include/config.php');
 require_once('include/network.php');
 require_once('include/plugin.php');
diff --git a/doc/Home.md b/doc/Home.md
index 3b6442867c..1f9b0cfab7 100644
--- a/doc/Home.md
+++ b/doc/Home.md
@@ -47,8 +47,10 @@ Friendica Documentation and Resources
 * [Theme Development](help/themes)
 * [Smarty 3 Templates](help/smarty3-templates)
 * [Database schema documantation](help/database)
+* [Class Autoloading](help/autoloader)
 * [Code - Reference(Doxygen generated - sets cookies)](doc/html/)
 
+
 **External Resources**
 
 * [Main Website](http://friendica.com)
diff --git a/doc/autoloader.md b/doc/autoloader.md
new file mode 100644
index 0000000000..947eade23c
--- /dev/null
+++ b/doc/autoloader.md
@@ -0,0 +1,209 @@
+Autoloader
+==========
+
+* [Home](help)
+
+There is some initial support to class autoloading in Friendica core.
+
+The autoloader code is in `include/autoloader.php`.
+It's derived from composer autoloader code.
+
+Namespaces and Classes are mapped to folders and files in `library/`,
+and the map must be updated by hand, because we don't use composer yet.
+The mapping is defined by files in `include/autoloader/` folder.
+
+Currently, only HTMLPurifier library is loaded using autoloader.
+
+
+## A quick introdution to class autoloading
+
+The autoloader it's a way for php to automagically include the file that define a class when the class is first used, without the need to use "require_once" every time.
+
+Once is setup you don't have to use it in any way. You need a class? you use the class.
+
+At his basic is a function passed to the "spl_autoload_register()" function, which receive as argument the class name the script want and is it job to include the correct php file where that class is defined.
+The best source for documentation is [php site](http://php.net/manual/en/language.oop5.autoload.php).
+
+One example, based on fictional friendica code.
+
+Let's say you have a php file in "include/" that define a very useful class:
+
+```
+    file: include/ItemsManager.php
+    <?php
+    namespace \Friendica;
+    
+    class ItemsManager {
+       public function getAll() { ... }
+       public function getByID($id) { ... }
+    }
+```
+
+The class "ItemsManager" has been declared in "Friendica" namespace.
+Namespaces are useful to keep things separated and avoid names clash (could be that a library you want to use defines a class named "ItemsManager", but as long as is in another namespace, you don't have any problem)
+
+If we were using composer, we had configured it with path where to find the classes of "Friendica" namespace, and then the composer script will generate the autoloader machinery for us.
+As we don't use composer, we need check that the autoloader knows the Friendica namespace.
+So in "include/autoloader/autoload_psr4.php" there should be something like
+
+```
+    $vendorDir = dirname(dirname(dirname(__FILE__)))."/library";
+    $baseDir = dirname($vendorDir);
+    return array(
+       "Friendica" => array($baseDir."/include");
+    );
+```
+
+
+That tells the autoloader code to look for files that defines classes in "Friendica" namespace under "include/" folder. (And btw, that's why the file has the same name as the class it defines.)
+
+*note*: The structure of files in "include/autoloader/" has been copied from the code generated by composer, to ease the work of enable autoloader for external libraries under "library/"
+
+Let's say now that you need to load some items in a view, maybe in a fictional "mod/network.php".
+Somewere at the start of the scripts, the autoloader was initialized. In Friendica is done at the top of "boot.php", with "require_once('include/autoloader.php');".
+
+The code will be something like:
+
+```
+    file: mod/network.php
+    <?php
+    
+    function network_content(&$a) {
+       $itemsmanager = new \Friendica\ItemsManager();
+       $items = $itemsmanager->getAll();
+    
+       // pass $items to template
+       // return result
+    }
+```
+
+That's a quite simple example, but look: no "require()"!
+You need to use a class, you use the class and you don't need to do anything more.
+
+Going further: now we have a bunch of "*Manager" classes that cause some code duplication, let's define a BaseManager class, where to move all code in common between all managers:
+
+```
+    file: include/BaseManager.php
+    <?php
+    namespace \Friendica;
+    
+    class BaseManager {
+      public function thatFunctionEveryManagerUses() { ... }
+    }
+```
+
+and then let's change the ItemsManager class to use this code
+
+```
+    file: include/ItemsManager.php
+    <?php
+    namespace \Friendica;
+    
+    class ItemsManager extends BaseManager {
+       public function getAll() { ... }
+       public function getByID($id) { ... }
+    }
+```
+
+The autoloader don't mind what you need the class for. You need a class, you get the class.
+It works with the "BaseManager" example here, it works when we need to call static methods on a class:
+
+```
+    file: include/dfrn.php
+    <?php    
+    namespace \Friendica;
+    
+    class dfrn {
+      public static function  mail($item, $owner) { ... }
+    }
+```
+
+```
+    file: mod/mail.php
+    <?php
+    
+    mail_post($a){
+     ...
+     \Friendica\dfrn::mail($item, $owner);
+     ...
+    }
+```
+
+If your code is in same namespace as the class you need, you don't need to prepend it:
+
+```
+    file: include/delivery.php
+    <?php
+    
+    namespace \Friendica;
+    
+    // this is the same content of current include/delivery.php, 
+    // but has been declared to be in "Friendica" namespace
+    
+    [...]
+    switch($contact['network']) {
+    
+        case NETWORK_DFRN:
+            if ($mail) {
+                $item['body'] = ...
+                $atom = dfrn::mail($item, $owner);
+            } elseif ($fsuggest) {
+                $atom = dfrn::fsuggest($item, $owner);
+                q("DELETE FROM `fsuggest` WHERE `id` = %d LIMIT 1", intval($item['id']));
+            } elseif ($relocate)
+                $atom = dfrn::relocate($owner, $uid);
+    [...]
+```
+
+This is real "include/delivery.php" unchanged, but as the code is declared to be in "Friendica" namespace, you don't need to write it when you need to use the "dfrn" class.
+But if you want to use classes from another library, you need to use the full namespace, e.g.
+
+```
+    <?php
+    namespace \Frienidca;
+    
+    class Diaspora {
+      public function md2bbcode() {
+        $html = \Michelf\MarkdownExtra::defaultTransform($text); 
+      }
+    }
+```
+
+if you use that class in many places of the code and you don't want to write the full path to the class everytime, you can use the "use" php keyword
+
+```
+    <?php
+    namespace \Frienidca;
+    
+    use \Michelf\MarkdownExtra;
+    
+    class Diaspora {
+      public function md2bbcode() {
+        $html = MarkdownExtra::defaultTransform($text); 
+      }
+    }
+```
+
+Note that namespaces are like paths in filesystem, separated by "\", with the first "\" being the global scope.
+You can go more deep if you want to, like:
+
+```
+    <?php
+    namespace \Friendica\Network;
+    
+    class DFRN {
+    }
+```
+
+or
+
+```
+    <?php
+    namespace \Friendica\DBA;
+    
+    class MySQL {
+    }
+```
+
+So you can think of namespaces as folders in a unix filesystem, with global scope as the root ("\").
+
diff --git a/doc/snarty3-templates.md b/doc/smarty3-templates.md
similarity index 100%
rename from doc/snarty3-templates.md
rename to doc/smarty3-templates.md
diff --git a/include/api.php b/include/api.php
index d205451e5e..d54e540f79 100644
--- a/include/api.php
+++ b/include/api.php
@@ -814,8 +814,6 @@
 
 		if((strpos($txt,'<') !== false) || (strpos($txt,'>') !== false)) {
 
-			require_once('library/HTMLPurifier.auto.php');
-
 			$txt = html2bb_video($txt);
 			$config = HTMLPurifier_Config::createDefault();
 			$config->set('Cache.DefinitionImpl', null);
@@ -855,9 +853,6 @@
 		if(requestdata('htmlstatus')) {
 			$txt = requestdata('htmlstatus');
 			if((strpos($txt,'<') !== false) || (strpos($txt,'>') !== false)) {
-
-				require_once('library/HTMLPurifier.auto.php');
-
 				$txt = html2bb_video($txt);
 
 				$config = HTMLPurifier_Config::createDefault();
diff --git a/include/autoloader.php b/include/autoloader.php
new file mode 100644
index 0000000000..6caa082915
--- /dev/null
+++ b/include/autoloader.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * @file include/autoloader.php
+ */
+
+/**
+ * @brief composer-derived autoloader init
+ **/
+class FriendicaAutoloaderInit
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/autoloader/ClassLoader.php';
+        }
+    }
+
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        spl_autoload_register(array('FriendicaAutoloaderInit', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader();
+        spl_autoload_unregister(array('FriendicaAutoloaderInit', 'loadClassLoader'));
+
+        // library 
+        $map = require __DIR__ . '/autoloader/autoload_namespaces.php';
+        foreach ($map as $namespace => $path) {
+            $loader->set($namespace, $path);
+        }
+
+        $map = require __DIR__ . '/autoloader/autoload_psr4.php';
+        foreach ($map as $namespace => $path) {
+            $loader->setPsr4($namespace, $path);
+        }
+
+        $classMap = require __DIR__ . '/autoloader/autoload_classmap.php';
+        if ($classMap) {
+            $loader->addClassMap($classMap);
+        }
+        
+        $loader->register(true);
+        
+        $includeFiles = require __DIR__ . '/autoloader/autoload_files.php';
+        foreach ($includeFiles as $fileIdentifier => $file) {
+            friendicaRequire($fileIdentifier, $file);
+        }
+        
+
+        return $loader;
+    }
+}
+
+function friendicaRequire($fileIdentifier, $file)
+{
+    if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
+        require $file;
+
+        $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+    }
+}
+
+
+
+return FriendicaAutoloaderInit::getLoader();
diff --git a/include/autoloader/ClassLoader.php b/include/autoloader/ClassLoader.php
new file mode 100644
index 0000000000..d916d802fe
--- /dev/null
+++ b/include/autoloader/ClassLoader.php
@@ -0,0 +1,413 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE.composer
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0 class loader
+ *
+ * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+class ClassLoader
+{
+    // PSR-4
+    private $prefixLengthsPsr4 = array();
+    private $prefixDirsPsr4 = array();
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    private $prefixesPsr0 = array();
+    private $fallbackDirsPsr0 = array();
+
+    private $useIncludePath = false;
+    private $classMap = array();
+
+    private $classMapAuthoritative = false;
+
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', $this->prefixesPsr0);
+        }
+
+        return array();
+    }
+
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array $classMap Class to filename map
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string       $prefix  The prefix
+     * @param array|string $paths   The PSR-0 root directories
+     * @param bool         $prepend Whether to prepend the directories
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    (array) $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string       $prefix  The prefix/namespace, with trailing '\\'
+     * @param array|string $paths   The PSR-0 base directories
+     * @param bool         $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    (array) $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string       $prefix The prefix
+     * @param array|string $paths  The PSR-0 base directories
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string       $prefix The prefix/namespace, with trailing '\\'
+     * @param array|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return bool|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            includeFile($file);
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // work around for PHP 5.3.0 - 5.3.2 https://bugs.php.net/50731
+        if ('\\' == $class[0]) {
+            $class = substr($class, 1);
+        }
+
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative) {
+            return false;
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if ($file === null && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if ($file === null) {
+            // Remember that this class does not exist.
+            return $this->classMap[$class] = false;
+        }
+
+        return $file;
+    }
+
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            foreach ($this->prefixLengthsPsr4[$first] as $prefix => $length) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($this->prefixDirsPsr4[$prefix] as $dir) {
+                        if (is_file($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+    }
+}
+
+/**
+ * Scope isolated include.
+ *
+ * Prevents access to $this/self from included files.
+ */
+function includeFile($file)
+{
+    include $file;
+}
diff --git a/include/autoloader/LICENSE.composer b/include/autoloader/LICENSE.composer
new file mode 100644
index 0000000000..b365b1f5a7
--- /dev/null
+++ b/include/autoloader/LICENSE.composer
@@ -0,0 +1,19 @@
+Copyright (c) 2015 Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the Software), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, andor sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/include/autoloader/autoload_classmap.php b/include/autoloader/autoload_classmap.php
new file mode 100644
index 0000000000..3efd09fc69
--- /dev/null
+++ b/include/autoloader/autoload_classmap.php
@@ -0,0 +1,9 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(dirname(dirname(__FILE__)))."/library";
+$baseDir = dirname($vendorDir);
+
+return array(
+);
diff --git a/include/autoloader/autoload_files.php b/include/autoloader/autoload_files.php
new file mode 100644
index 0000000000..859135cc48
--- /dev/null
+++ b/include/autoloader/autoload_files.php
@@ -0,0 +1,10 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(dirname(dirname(__FILE__)))."/library";
+$baseDir = dirname($vendorDir);
+
+return array(
+    '2cffec82183ee1cea088009cef9a6fc3' => $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
+);
diff --git a/include/autoloader/autoload_namespaces.php b/include/autoloader/autoload_namespaces.php
new file mode 100644
index 0000000000..315a349310
--- /dev/null
+++ b/include/autoloader/autoload_namespaces.php
@@ -0,0 +1,10 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(dirname(__FILE__)))."/library";
+$baseDir = dirname($vendorDir);
+
+return array(
+    'HTMLPurifier' => array($vendorDir . '/ezyang/htmlpurifier/library'),
+);
diff --git a/include/autoloader/autoload_psr4.php b/include/autoloader/autoload_psr4.php
new file mode 100644
index 0000000000..fe93afea21
--- /dev/null
+++ b/include/autoloader/autoload_psr4.php
@@ -0,0 +1,9 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(dirname(dirname(__FILE__)))."/library";
+$baseDir = dirname($vendorDir);
+
+return array(
+);
diff --git a/include/dfrn.php b/include/dfrn.php
index 8938a9b6f7..a96d2830e4 100644
--- a/include/dfrn.php
+++ b/include/dfrn.php
@@ -18,7 +18,6 @@ require_once("include/event.php");
 require_once("include/text.php");
 require_once("include/oembed.php");
 require_once("include/html2bbcode.php");
-require_once("library/HTMLPurifier.auto.php");
 
 /**
  * @brief This class contain functions to create and send DFRN XML files
diff --git a/include/event.php b/include/event.php
index 13c414c9e3..a9f054fc2e 100644
--- a/include/event.php
+++ b/include/event.php
@@ -76,7 +76,6 @@ function format_event_html($ev, $simple = false) {
 function parse_event($h) {
 
 	require_once('include/Scrape.php');
-	require_once('library/HTMLPurifier.auto.php');
 	require_once('include/html2bbcode');
 
 	$h = '<html><body>' . $h . '</body></html>';
diff --git a/include/group.php b/include/group.php
index a1375e00df..2b872f16a7 100644
--- a/include/group.php
+++ b/include/group.php
@@ -215,7 +215,7 @@ function mini_group_select($uid,$gid = 0) {
 
 /**
  * @brief Create group sidebar widget
- * 
+ *
  * @param string $every
  * @param string $each
  * @param string $editmode
@@ -234,7 +234,7 @@ function group_side($every="contacts",$each="group",$editmode = "standard", $gro
 		return '';
 
 	$groups = array();
-	
+
 	$groups[] = array(
 		'text' 	=> t('Everybody'),
 		'id' => 0,
@@ -255,7 +255,7 @@ function group_side($every="contacts",$each="group",$editmode = "standard", $gro
 	if(count($r)) {
 		foreach($r as $rr) {
 			$selected = (($group_id == $rr['id']) ? ' group-selected' : '');
-			
+
 			if ($editmode == "full") {
 				$groupedit = array(
 					'href' => "group/".$rr['id'],
@@ -264,7 +264,7 @@ function group_side($every="contacts",$each="group",$editmode = "standard", $gro
 			} else {
 				$groupedit = null;
 			}
-			
+
 			$groups[] = array(
 				'id'		=> $rr['id'],
 				'cid'		=> $cid,
@@ -362,14 +362,13 @@ function groups_containing($uid,$c) {
  */
 function groups_count_unseen() {
 
-	$r = q("SELECT `group`.`id`, `group`.`name`, COUNT(`item`.`id`) AS `count` FROM `group`, `group_member`, `item`
-			WHERE `group`.`uid` = %d
-			AND `item`.`uid` = %d
-			AND `item`.`unseen` AND `item`.`visible`
-			AND NOT `item`.`deleted`
-			AND `item`.`contact-id` = `group_member`.`contact-id`
-			AND `group_member`.`gid` = `group`.`id`
-			GROUP BY `group`.`id` ",
+	$r = q("SELECT `group`.`id`, `group`.`name`,
+			(SELECT COUNT(*) FROM `item`
+				WHERE `uid` = %d AND `unseen` AND
+					`contact-id` IN (SELECT `contact-id` FROM `group_member`
+								WHERE `group_member`.`gid` = `group`.`id` AND `group_member`.`uid` = %d)) AS `count`
+			FROM `group` WHERE `group`.`uid` = %d;",
+		intval(local_user()),
 		intval(local_user()),
 		intval(local_user())
 	);
diff --git a/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php b/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php
deleted file mode 100644
index 292c040d4b..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
-{
-
-    public function __construct() {
-        parent::__construct(false); // opacity is non-negative, but we will clamp it
-    }
-
-    public function validate($number, $config, $context) {
-        $result = parent::validate($number, $config, $context);
-        if ($result === false) return $result;
-        $float = (float) $result;
-        if ($float < 0.0) $result = '0';
-        if ($float > 1.0) $result = '1';
-        return $result;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php b/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
deleted file mode 100644
index 6599c5b2dd..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * Decorator which enables CSS properties to be disabled for specific elements.
- */
-class HTMLPurifier_AttrDef_CSS_DenyElementDecorator extends HTMLPurifier_AttrDef
-{
-    public $def, $element;
-
-    /**
-     * @param $def Definition to wrap
-     * @param $element Element to deny
-     */
-    public function __construct($def, $element) {
-        $this->def = $def;
-        $this->element = $element;
-    }
-    /**
-     * Checks if CurrentToken is set and equal to $this->element
-     */
-    public function validate($string, $config, $context) {
-        $token = $context->get('CurrentToken', true);
-        if ($token && $token->name == $this->element) return false;
-        return $this->def->validate($string, $config, $context);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/FontFamily.php b/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
deleted file mode 100644
index 42c2054c2a..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-
-/**
- * Validates a font family list according to CSS spec
- * @todo whitelisting allowed fonts would be nice
- */
-class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-        static $generic_names = array(
-            'serif' => true,
-            'sans-serif' => true,
-            'monospace' => true,
-            'fantasy' => true,
-            'cursive' => true
-        );
-
-        // assume that no font names contain commas in them
-        $fonts = explode(',', $string);
-        $final = '';
-        foreach($fonts as $font) {
-            $font = trim($font);
-            if ($font === '') continue;
-            // match a generic name
-            if (isset($generic_names[$font])) {
-                $final .= $font . ', ';
-                continue;
-            }
-            // match a quoted name
-            if ($font[0] === '"' || $font[0] === "'") {
-                $length = strlen($font);
-                if ($length <= 2) continue;
-                $quote = $font[0];
-                if ($font[$length - 1] !== $quote) continue;
-                $font = substr($font, 1, $length - 2);
-            }
-
-            $font = $this->expandCSSEscape($font);
-
-            // $font is a pure representation of the font name
-
-            if (ctype_alnum($font) && $font !== '') {
-                // very simple font, allow it in unharmed
-                $final .= $font . ', ';
-                continue;
-            }
-
-            // bugger out on whitespace.  form feed (0C) really
-            // shouldn't show up regardless
-            $font = str_replace(array("\n", "\t", "\r", "\x0C"), ' ', $font);
-
-            // These ugly transforms don't pose a security
-            // risk (as \\ and \" might).  We could try to be clever and
-            // use single-quote wrapping when there is a double quote
-            // present, but I have choosen not to implement that.
-            // (warning: this code relies on the selection of quotation
-            // mark below)
-            $font = str_replace('\\', '\\5C ', $font);
-            $font = str_replace('"',  '\\22 ', $font);
-
-            // complicated font, requires quoting
-            $final .= "\"$font\", "; // note that this will later get turned into &quot;
-        }
-        $final = rtrim($final, ', ');
-        if ($final === '') return false;
-        return $final;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Length.php b/library/HTMLPurifier/AttrDef/CSS/Length.php
deleted file mode 100644
index a07ec58135..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/Length.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-/**
- * Represents a Length as defined by CSS.
- */
-class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
-{
-
-    protected $min, $max;
-
-    /**
-     * @param HTMLPurifier_Length $max Minimum length, or null for no bound. String is also acceptable.
-     * @param HTMLPurifier_Length $max Maximum length, or null for no bound. String is also acceptable.
-     */
-    public function __construct($min = null, $max = null) {
-        $this->min = $min !== null ? HTMLPurifier_Length::make($min) : null;
-        $this->max = $max !== null ? HTMLPurifier_Length::make($max) : null;
-    }
-
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-
-        // Optimizations
-        if ($string === '') return false;
-        if ($string === '0') return '0';
-        if (strlen($string) === 1) return false;
-
-        $length = HTMLPurifier_Length::make($string);
-        if (!$length->isValid()) return false;
-
-        if ($this->min) {
-            $c = $length->compareTo($this->min);
-            if ($c === false) return false;
-            if ($c < 0) return false;
-        }
-        if ($this->max) {
-            $c = $length->compareTo($this->max);
-            if ($c === false) return false;
-            if ($c > 0) return false;
-        }
-
-        return $length->toString();
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/ListStyle.php b/library/HTMLPurifier/AttrDef/CSS/ListStyle.php
deleted file mode 100644
index 4406868c08..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/ListStyle.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-/**
- * Validates shorthand CSS property list-style.
- * @warning Does not support url tokens that have internal spaces.
- */
-class HTMLPurifier_AttrDef_CSS_ListStyle extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Local copy of component validators.
-     * @note See HTMLPurifier_AttrDef_CSS_Font::$info for a similar impl.
-     */
-    protected $info;
-
-    public function __construct($config) {
-        $def = $config->getCSSDefinition();
-        $this->info['list-style-type']     = $def->info['list-style-type'];
-        $this->info['list-style-position'] = $def->info['list-style-position'];
-        $this->info['list-style-image'] = $def->info['list-style-image'];
-    }
-
-    public function validate($string, $config, $context) {
-
-        // regular pre-processing
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
-
-        // assumes URI doesn't have spaces in it
-        $bits = explode(' ', strtolower($string)); // bits to process
-
-        $caught = array();
-        $caught['type']     = false;
-        $caught['position'] = false;
-        $caught['image']    = false;
-
-        $i = 0; // number of catches
-        $none = false;
-
-        foreach ($bits as $bit) {
-            if ($i >= 3) return; // optimization bit
-            if ($bit === '') continue;
-            foreach ($caught as $key => $status) {
-                if ($status !== false) continue;
-                $r = $this->info['list-style-' . $key]->validate($bit, $config, $context);
-                if ($r === false) continue;
-                if ($r === 'none') {
-                    if ($none) continue;
-                    else $none = true;
-                    if ($key == 'image') continue;
-                }
-                $caught[$key] = $r;
-                $i++;
-                break;
-            }
-        }
-
-        if (!$i) return false;
-
-        $ret = array();
-
-        // construct type
-        if ($caught['type']) $ret[] = $caught['type'];
-
-        // construct image
-        if ($caught['image']) $ret[] = $caught['image'];
-
-        // construct position
-        if ($caught['position']) $ret[] = $caught['position'];
-
-        if (empty($ret)) return false;
-        return implode(' ', $ret);
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Percentage.php b/library/HTMLPurifier/AttrDef/CSS/Percentage.php
deleted file mode 100644
index c34b8fc3c3..0000000000
--- a/library/HTMLPurifier/AttrDef/CSS/Percentage.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * Validates a Percentage as defined by the CSS spec.
- */
-class HTMLPurifier_AttrDef_CSS_Percentage extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_CSS_Number to defer number validation
-     */
-    protected $number_def;
-
-    /**
-     * @param Bool indicating whether to forbid negative values
-     */
-    public function __construct($non_negative = false) {
-        $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
-    }
-
-    public function validate($string, $config, $context) {
-
-        $string = $this->parseCDATA($string);
-
-        if ($string === '') return false;
-        $length = strlen($string);
-        if ($length === 1) return false;
-        if ($string[$length - 1] !== '%') return false;
-
-        $number = substr($string, 0, $length - 1);
-        $number = $this->number_def->validate($number, $config, $context);
-
-        if ($number === false) return false;
-        return "$number%";
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Bool.php b/library/HTMLPurifier/AttrDef/HTML/Bool.php
deleted file mode 100644
index e06987eb8d..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/Bool.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * Validates a boolean attribute
- */
-class HTMLPurifier_AttrDef_HTML_Bool extends HTMLPurifier_AttrDef
-{
-
-    protected $name;
-    public $minimized = true;
-
-    public function __construct($name = false) {$this->name = $name;}
-
-    public function validate($string, $config, $context) {
-        if (empty($string)) return false;
-        return $this->name;
-    }
-
-    /**
-     * @param $string Name of attribute
-     */
-    public function make($string) {
-        return new HTMLPurifier_AttrDef_HTML_Bool($string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Color.php b/library/HTMLPurifier/AttrDef/HTML/Color.php
deleted file mode 100644
index d01e20454e..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/Color.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-/**
- * Validates a color according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-
-        static $colors = null;
-        if ($colors === null) $colors = $config->get('Core.ColorKeywords');
-
-        $string = trim($string);
-
-        if (empty($string)) return false;
-        if (isset($colors[$string])) return $colors[$string];
-        if ($string[0] === '#') $hex = substr($string, 1);
-        else $hex = $string;
-
-        $length = strlen($hex);
-        if ($length !== 3 && $length !== 6) return false;
-        if (!ctype_xdigit($hex)) return false;
-        if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
-
-        return "#$hex";
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php b/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php
deleted file mode 100644
index ae6ea7c01d..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * Special-case enum attribute definition that lazy loads allowed frame targets
- */
-class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum
-{
-
-    public $valid_values = false; // uninitialized value
-    protected $case_sensitive = false;
-
-    public function __construct() {}
-
-    public function validate($string, $config, $context) {
-        if ($this->valid_values === false) $this->valid_values = $config->get('Attr.AllowedFrameTargets');
-        return parent::validate($string, $config, $context);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/ID.php b/library/HTMLPurifier/AttrDef/HTML/ID.php
deleted file mode 100644
index 81d03762de..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/ID.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-/**
- * Validates the HTML attribute ID.
- * @warning Even though this is the id processor, it
- *          will ignore the directive Attr:IDBlacklist, since it will only
- *          go according to the ID accumulator. Since the accumulator is
- *          automatically generated, it will have already absorbed the
- *          blacklist. If you're hacking around, make sure you use load()!
- */
-
-class HTMLPurifier_AttrDef_HTML_ID extends HTMLPurifier_AttrDef
-{
-
-    // ref functionality disabled, since we also have to verify
-    // whether or not the ID it refers to exists
-
-    public function validate($id, $config, $context) {
-
-        if (!$config->get('Attr.EnableID')) return false;
-
-        $id = trim($id); // trim it first
-
-        if ($id === '') return false;
-
-        $prefix = $config->get('Attr.IDPrefix');
-        if ($prefix !== '') {
-            $prefix .= $config->get('Attr.IDPrefixLocal');
-            // prevent re-appending the prefix
-            if (strpos($id, $prefix) !== 0) $id = $prefix . $id;
-        } elseif ($config->get('Attr.IDPrefixLocal') !== '') {
-            trigger_error('%Attr.IDPrefixLocal cannot be used unless '.
-                '%Attr.IDPrefix is set', E_USER_WARNING);
-        }
-
-        //if (!$this->ref) {
-            $id_accumulator =& $context->get('IDAccumulator');
-            if (isset($id_accumulator->ids[$id])) return false;
-        //}
-
-        // we purposely avoid using regex, hopefully this is faster
-
-        if (ctype_alpha($id)) {
-            $result = true;
-        } else {
-            if (!ctype_alpha(@$id[0])) return false;
-            $trim = trim( // primitive style of regexps, I suppose
-                $id,
-                'A..Za..z0..9:-._'
-              );
-            $result = ($trim === '');
-        }
-
-        $regexp = $config->get('Attr.IDBlacklistRegexp');
-        if ($regexp && preg_match($regexp, $id)) {
-            return false;
-        }
-
-        if (/*!$this->ref && */$result) $id_accumulator->add($id);
-
-        // if no change was made to the ID, return the result
-        // else, return the new id if stripping whitespace made it
-        //     valid, or return false.
-        return $result ? $id : false;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Length.php b/library/HTMLPurifier/AttrDef/HTML/Length.php
deleted file mode 100644
index a242f9c238..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/Length.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * Validates the HTML type length (not to be confused with CSS's length).
- *
- * This accepts integer pixels or percentages as lengths for certain
- * HTML attributes.
- */
-
-class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '') return false;
-
-        $parent_result = parent::validate($string, $config, $context);
-        if ($parent_result !== false) return $parent_result;
-
-        $length = strlen($string);
-        $last_char = $string[$length - 1];
-
-        if ($last_char !== '%') return false;
-
-        $points = substr($string, 0, $length - 1);
-
-        if (!is_numeric($points)) return false;
-
-        $points = (int) $points;
-
-        if ($points < 0) return '0%';
-        if ($points > 100) return '100%';
-
-        return ((string) $points) . '%';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/MultiLength.php b/library/HTMLPurifier/AttrDef/HTML/MultiLength.php
deleted file mode 100644
index c72fc76e4d..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/MultiLength.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * Validates a MultiLength as defined by the HTML spec.
- *
- * A multilength is either a integer (pixel count), a percentage, or
- * a relative number.
- */
-class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '') return false;
-
-        $parent_result = parent::validate($string, $config, $context);
-        if ($parent_result !== false) return $parent_result;
-
-        $length = strlen($string);
-        $last_char = $string[$length - 1];
-
-        if ($last_char !== '*') return false;
-
-        $int = substr($string, 0, $length - 1);
-
-        if ($int == '') return '*';
-        if (!is_numeric($int)) return false;
-
-        $int = (int) $int;
-
-        if ($int < 0) return false;
-        if ($int == 0) return '0';
-        if ($int == 1) return '*';
-        return ((string) $int) . '*';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Pixels.php b/library/HTMLPurifier/AttrDef/HTML/Pixels.php
deleted file mode 100644
index 4cb2c1b857..0000000000
--- a/library/HTMLPurifier/AttrDef/HTML/Pixels.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * Validates an integer representation of pixels according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef
-{
-
-    protected $max;
-
-    public function __construct($max = null) {
-        $this->max = $max;
-    }
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '0') return $string;
-        if ($string === '')  return false;
-        $length = strlen($string);
-        if (substr($string, $length - 2) == 'px') {
-            $string = substr($string, 0, $length - 2);
-        }
-        if (!is_numeric($string)) return false;
-        $int = (int) $string;
-
-        if ($int < 0) return '0';
-
-        // upper-bound value, extremely high values can
-        // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
-        // WARNING, above link WILL crash you if you're using Windows
-
-        if ($this->max !== null && $int > $this->max) return (string) $this->max;
-
-        return (string) $int;
-
-    }
-
-    public function make($string) {
-        if ($string === '') $max = null;
-        else $max = (int) $string;
-        $class = get_class($this);
-        return new $class($max);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/Text.php b/library/HTMLPurifier/AttrDef/Text.php
deleted file mode 100644
index c6216cc531..0000000000
--- a/library/HTMLPurifier/AttrDef/Text.php
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-
-/**
- * Validates arbitrary text according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_Text extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-        return $this->parseCDATA($string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/URI/Host.php b/library/HTMLPurifier/AttrDef/URI/Host.php
deleted file mode 100644
index 2156c10c66..0000000000
--- a/library/HTMLPurifier/AttrDef/URI/Host.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-/**
- * Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
- */
-class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
-     */
-    protected $ipv4;
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
-     */
-    protected $ipv6;
-
-    public function __construct() {
-        $this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
-        $this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
-    }
-
-    public function validate($string, $config, $context) {
-        $length = strlen($string);
-        if ($string === '') return '';
-        if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
-            //IPv6
-            $ip = substr($string, 1, $length - 2);
-            $valid = $this->ipv6->validate($ip, $config, $context);
-            if ($valid === false) return false;
-            return '['. $valid . ']';
-        }
-
-        // need to do checks on unusual encodings too
-        $ipv4 = $this->ipv4->validate($string, $config, $context);
-        if ($ipv4 !== false) return $ipv4;
-
-        // A regular domain name.
-
-        // This breaks I18N domain names, but we don't have proper IRI support,
-        // so force users to insert Punycode. If there's complaining we'll
-        // try to fix things into an international friendly form.
-
-        // The productions describing this are:
-        $a   = '[a-z]';     // alpha
-        $an  = '[a-z0-9]';  // alphanum
-        $and = '[a-z0-9-]'; // alphanum | "-"
-        // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
-        $domainlabel   = "$an($and*$an)?";
-        // toplabel    = alpha | alpha *( alphanum | "-" ) alphanum
-        $toplabel      = "$a($and*$an)?";
-        // hostname    = *( domainlabel "." ) toplabel [ "." ]
-        $match = preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string);
-        if (!$match) return false;
-
-        return $string;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/URI/IPv6.php b/library/HTMLPurifier/AttrDef/URI/IPv6.php
deleted file mode 100644
index 9454e9be50..0000000000
--- a/library/HTMLPurifier/AttrDef/URI/IPv6.php
+++ /dev/null
@@ -1,99 +0,0 @@
-<?php
-
-/**
- * Validates an IPv6 address.
- * @author Feyd @ forums.devnetwork.net (public domain)
- * @note This function requires brackets to have been removed from address
- *       in URI.
- */
-class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
-{
-
-    public function validate($aIP, $config, $context) {
-
-        if (!$this->ip4) $this->_loadRegex();
-
-        $original = $aIP;
-
-        $hex = '[0-9a-fA-F]';
-        $blk = '(?:' . $hex . '{1,4})';
-        $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))';   // /0 - /128
-
-        //      prefix check
-        if (strpos($aIP, '/') !== false)
-        {
-                if (preg_match('#' . $pre . '$#s', $aIP, $find))
-                {
-                        $aIP = substr($aIP, 0, 0-strlen($find[0]));
-                        unset($find);
-                }
-                else
-                {
-                        return false;
-                }
-        }
-
-        //      IPv4-compatiblity check
-        if (preg_match('#(?<=:'.')' . $this->ip4 . '$#s', $aIP, $find))
-        {
-                $aIP = substr($aIP, 0, 0-strlen($find[0]));
-                $ip = explode('.', $find[0]);
-                $ip = array_map('dechex', $ip);
-                $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
-                unset($find, $ip);
-        }
-
-        //      compression check
-        $aIP = explode('::', $aIP);
-        $c = count($aIP);
-        if ($c > 2)
-        {
-                return false;
-        }
-        elseif ($c == 2)
-        {
-                list($first, $second) = $aIP;
-                $first = explode(':', $first);
-                $second = explode(':', $second);
-
-                if (count($first) + count($second) > 8)
-                {
-                        return false;
-                }
-
-                while(count($first) < 8)
-                {
-                        array_push($first, '0');
-                }
-
-                array_splice($first, 8 - count($second), 8, $second);
-                $aIP = $first;
-                unset($first,$second);
-        }
-        else
-        {
-                $aIP = explode(':', $aIP[0]);
-        }
-        $c = count($aIP);
-
-        if ($c != 8)
-        {
-                return false;
-        }
-
-        //      All the pieces should be 16-bit hex strings. Are they?
-        foreach ($aIP as $piece)
-        {
-                if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece)))
-                {
-                        return false;
-                }
-        }
-
-        return $original;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/BoolToCSS.php b/library/HTMLPurifier/AttrTransform/BoolToCSS.php
deleted file mode 100644
index 51159b6715..0000000000
--- a/library/HTMLPurifier/AttrTransform/BoolToCSS.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes converts a boolean attribute to fixed CSS
- */
-class HTMLPurifier_AttrTransform_BoolToCSS extends HTMLPurifier_AttrTransform {
-
-    /**
-     * Name of boolean attribute that is trigger
-     */
-    protected $attr;
-
-    /**
-     * CSS declarations to add to style, needs trailing semicolon
-     */
-    protected $css;
-
-    /**
-     * @param $attr string attribute name to convert from
-     * @param $css string CSS declarations to add to style (needs semicolon)
-     */
-    public function __construct($attr, $css) {
-        $this->attr = $attr;
-        $this->css  = $css;
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr[$this->attr])) return $attr;
-        unset($attr[$this->attr]);
-        $this->prependCSS($attr, $this->css);
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/EnumToCSS.php b/library/HTMLPurifier/AttrTransform/EnumToCSS.php
deleted file mode 100644
index 2a5b4514ab..0000000000
--- a/library/HTMLPurifier/AttrTransform/EnumToCSS.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/**
- * Generic pre-transform that converts an attribute with a fixed number of
- * values (enumerated) to CSS.
- */
-class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {
-
-    /**
-     * Name of attribute to transform from
-     */
-    protected $attr;
-
-    /**
-     * Lookup array of attribute values to CSS
-     */
-    protected $enumToCSS = array();
-
-    /**
-     * Case sensitivity of the matching
-     * @warning Currently can only be guaranteed to work with ASCII
-     *          values.
-     */
-    protected $caseSensitive = false;
-
-    /**
-     * @param $attr String attribute name to transform from
-     * @param $enumToCSS Lookup array of attribute values to CSS
-     * @param $case_sensitive Boolean case sensitivity indicator, default false
-     */
-    public function __construct($attr, $enum_to_css, $case_sensitive = false) {
-        $this->attr = $attr;
-        $this->enumToCSS = $enum_to_css;
-        $this->caseSensitive = (bool) $case_sensitive;
-    }
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr[$this->attr])) return $attr;
-
-        $value = trim($attr[$this->attr]);
-        unset($attr[$this->attr]);
-
-        if (!$this->caseSensitive) $value = strtolower($value);
-
-        if (!isset($this->enumToCSS[$value])) {
-            return $attr;
-        }
-
-        $this->prependCSS($attr, $this->enumToCSS[$value]);
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Length.php b/library/HTMLPurifier/AttrTransform/Length.php
deleted file mode 100644
index ea2f30473d..0000000000
--- a/library/HTMLPurifier/AttrTransform/Length.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * Class for handling width/height length attribute transformations to CSS
- */
-class HTMLPurifier_AttrTransform_Length extends HTMLPurifier_AttrTransform
-{
-
-    protected $name;
-    protected $cssName;
-
-    public function __construct($name, $css_name = null) {
-        $this->name = $name;
-        $this->cssName = $css_name ? $css_name : $name;
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr[$this->name])) return $attr;
-        $length = $this->confiscateAttr($attr, $this->name);
-        if(ctype_digit($length)) $length .= 'px';
-        $this->prependCSS($attr, $this->cssName . ":$length;");
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Name.php b/library/HTMLPurifier/AttrTransform/Name.php
deleted file mode 100644
index 15315bc735..0000000000
--- a/library/HTMLPurifier/AttrTransform/Name.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes deprecated name attribute to ID if necessary
- */
-class HTMLPurifier_AttrTransform_Name extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-        // Abort early if we're using relaxed definition of name
-        if ($config->get('HTML.Attr.Name.UseCDATA')) return $attr;
-        if (!isset($attr['name'])) return $attr;
-        $id = $this->confiscateAttr($attr, 'name');
-        if ( isset($attr['id']))   return $attr;
-        $attr['id'] = $id;
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/NameSync.php b/library/HTMLPurifier/AttrTransform/NameSync.php
deleted file mode 100644
index a95638c140..0000000000
--- a/library/HTMLPurifier/AttrTransform/NameSync.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * Post-transform that performs validation to the name attribute; if
- * it is present with an equivalent id attribute, it is passed through;
- * otherwise validation is performed.
- */
-class HTMLPurifier_AttrTransform_NameSync extends HTMLPurifier_AttrTransform
-{
-
-    public function __construct() {
-        $this->idDef = new HTMLPurifier_AttrDef_HTML_ID();
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['name'])) return $attr;
-        $name = $attr['name'];
-        if (isset($attr['id']) && $attr['id'] === $name) return $attr;
-        $result = $this->idDef->validate($name, $config, $context);
-        if ($result === false) unset($attr['name']);
-        else $attr['name'] = $result;
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/SafeObject.php b/library/HTMLPurifier/AttrTransform/SafeObject.php
deleted file mode 100644
index 1ed74898ba..0000000000
--- a/library/HTMLPurifier/AttrTransform/SafeObject.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * Writes default type for all objects. Currently only supports flash.
- */
-class HTMLPurifier_AttrTransform_SafeObject extends HTMLPurifier_AttrTransform
-{
-    public $name = "SafeObject";
-
-    function transform($attr, $config, $context) {
-        if (!isset($attr['type'])) $attr['type'] = 'application/x-shockwave-flash';
-        return $attr;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Textarea.php b/library/HTMLPurifier/AttrTransform/Textarea.php
deleted file mode 100644
index 81ac3488ba..0000000000
--- a/library/HTMLPurifier/AttrTransform/Textarea.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/**
- * Sets height/width defaults for <textarea>
- */
-class HTMLPurifier_AttrTransform_Textarea extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-        // Calculated from Firefox
-        if (!isset($attr['cols'])) $attr['cols'] = '22';
-        if (!isset($attr['rows'])) $attr['rows'] = '3';
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Bootstrap.php b/library/HTMLPurifier/Bootstrap.php
deleted file mode 100644
index 559f61a232..0000000000
--- a/library/HTMLPurifier/Bootstrap.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-// constants are slow, so we use as few as possible
-if (!defined('HTMLPURIFIER_PREFIX')) {
-    define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));
-}
-
-// accomodations for versions earlier than 5.0.2
-// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
-if (!defined('PHP_EOL')) {
-    switch (strtoupper(substr(PHP_OS, 0, 3))) {
-        case 'WIN':
-            define('PHP_EOL', "\r\n");
-            break;
-        case 'DAR':
-            define('PHP_EOL', "\r");
-            break;
-        default:
-            define('PHP_EOL', "\n");
-    }
-}
-
-/**
- * Bootstrap class that contains meta-functionality for HTML Purifier such as
- * the autoload function.
- *
- * @note
- *      This class may be used without any other files from HTML Purifier.
- */
-class HTMLPurifier_Bootstrap
-{
-
-    /**
-     * Autoload function for HTML Purifier
-     * @param $class Class to load
-     */
-    public static function autoload($class) {
-        $file = HTMLPurifier_Bootstrap::getPath($class);
-        if (!$file) return false;
-        require HTMLPURIFIER_PREFIX . '/' . $file;
-        return true;
-    }
-
-    /**
-     * Returns the path for a specific class.
-     */
-    public static function getPath($class) {
-        if (strncmp('HTMLPurifier', $class, 12) !== 0) return false;
-        // Custom implementations
-        if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
-            $code = str_replace('_', '-', substr($class, 22));
-            $file = 'HTMLPurifier/Language/classes/' . $code . '.php';
-        } else {
-            $file = str_replace('_', '/', $class) . '.php';
-        }
-        if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) return false;
-        return $file;
-    }
-
-    /**
-     * "Pre-registers" our autoloader on the SPL stack.
-     */
-    public static function registerAutoload() {
-        $autoload = array('HTMLPurifier_Bootstrap', 'autoload');
-        if ( ($funcs = spl_autoload_functions()) === false ) {
-            spl_autoload_register($autoload);
-        } elseif (function_exists('spl_autoload_unregister')) {
-            $compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
-                      version_compare(PHP_VERSION, '5.1.0', '>=');
-            foreach ($funcs as $func) {
-                if (is_array($func)) {
-                    // :TRICKY: There are some compatibility issues and some
-                    // places where we need to error out
-                    $reflector = new ReflectionMethod($func[0], $func[1]);
-                    if (!$reflector->isStatic()) {
-                        throw new Exception('
-                            HTML Purifier autoloader registrar is not compatible
-                            with non-static object methods due to PHP Bug #44144;
-                            Please do not use HTMLPurifier.autoload.php (or any
-                            file that includes this file); instead, place the code:
-                            spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
-                            after your own autoloaders.
-                        ');
-                    }
-                    // Suprisingly, spl_autoload_register supports the
-                    // Class::staticMethod callback format, although call_user_func doesn't
-                    if ($compat) $func = implode('::', $func);
-                }
-                spl_autoload_unregister($func);
-            }
-            spl_autoload_register($autoload);
-            foreach ($funcs as $func) spl_autoload_register($func);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/CSSDefinition.php b/library/HTMLPurifier/CSSDefinition.php
deleted file mode 100644
index 6a2e6f56d9..0000000000
--- a/library/HTMLPurifier/CSSDefinition.php
+++ /dev/null
@@ -1,292 +0,0 @@
-<?php
-
-/**
- * Defines allowed CSS attributes and what their values are.
- * @see HTMLPurifier_HTMLDefinition
- */
-class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
-{
-
-    public $type = 'CSS';
-
-    /**
-     * Assoc array of attribute name to definition object.
-     */
-    public $info = array();
-
-    /**
-     * Constructs the info array.  The meat of this class.
-     */
-    protected function doSetup($config) {
-
-        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
-            array('left', 'right', 'center', 'justify'), false);
-
-        $border_style =
-        $this->info['border-bottom-style'] =
-        $this->info['border-right-style'] =
-        $this->info['border-left-style'] =
-        $this->info['border-top-style'] =  new HTMLPurifier_AttrDef_Enum(
-            array('none', 'hidden', 'dotted', 'dashed', 'solid', 'double',
-            'groove', 'ridge', 'inset', 'outset'), false);
-
-        $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
-
-        $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
-            array('none', 'left', 'right', 'both'), false);
-        $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
-            array('none', 'left', 'right'), false);
-        $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'italic', 'oblique'), false);
-        $this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'small-caps'), false);
-
-        $uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
-            array(
-                new HTMLPurifier_AttrDef_Enum(array('none')),
-                new HTMLPurifier_AttrDef_CSS_URI()
-            )
-        );
-
-        $this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
-            array('inside', 'outside'), false);
-        $this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
-            array('disc', 'circle', 'square', 'decimal', 'lower-roman',
-            'upper-roman', 'lower-alpha', 'upper-alpha', 'none'), false);
-        $this->info['list-style-image'] = $uri_or_none;
-
-        $this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
-
-        $this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
-            array('capitalize', 'uppercase', 'lowercase', 'none'), false);
-        $this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
-
-        $this->info['background-image'] = $uri_or_none;
-        $this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
-            array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
-        );
-        $this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
-            array('scroll', 'fixed')
-        );
-        $this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
-
-        $border_color =
-        $this->info['border-top-color'] =
-        $this->info['border-bottom-color'] =
-        $this->info['border-left-color'] =
-        $this->info['border-right-color'] =
-        $this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('transparent')),
-            new HTMLPurifier_AttrDef_CSS_Color()
-        ));
-
-        $this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
-
-        $this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
-
-        $border_width =
-        $this->info['border-top-width'] =
-        $this->info['border-bottom-width'] =
-        $this->info['border-left-width'] =
-        $this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
-            new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
-        ));
-
-        $this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
-
-        $this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('xx-small', 'x-small',
-                'small', 'medium', 'large', 'x-large', 'xx-large',
-                'larger', 'smaller')),
-            new HTMLPurifier_AttrDef_CSS_Percentage(),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true)
-        ));
-
-        $margin =
-        $this->info['margin-top'] =
-        $this->info['margin-bottom'] =
-        $this->info['margin-left'] =
-        $this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage(),
-            new HTMLPurifier_AttrDef_Enum(array('auto'))
-        ));
-
-        $this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
-
-        // non-negative
-        $padding =
-        $this->info['padding-top'] =
-        $this->info['padding-bottom'] =
-        $this->info['padding-left'] =
-        $this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true)
-        ));
-
-        $this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
-
-        $this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage()
-        ));
-
-        $trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true),
-            new HTMLPurifier_AttrDef_Enum(array('auto'))
-        ));
-        $max = $config->get('CSS.MaxImgLength');
-
-        $this->info['width'] =
-        $this->info['height'] =
-            $max === null ?
-            $trusted_wh :
-            new HTMLPurifier_AttrDef_Switch('img',
-                // For img tags:
-                new HTMLPurifier_AttrDef_CSS_Composite(array(
-                    new HTMLPurifier_AttrDef_CSS_Length('0', $max),
-                    new HTMLPurifier_AttrDef_Enum(array('auto'))
-                )),
-                // For everyone else:
-                $trusted_wh
-            );
-
-        $this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
-
-        $this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
-
-        // this could use specialized code
-        $this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'bold', 'bolder', 'lighter', '100', '200', '300',
-            '400', '500', '600', '700', '800', '900'), false);
-
-        // MUST be called after other font properties, as it references
-        // a CSSDefinition object
-        $this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
-
-        // same here
-        $this->info['border'] =
-        $this->info['border-bottom'] =
-        $this->info['border-top'] =
-        $this->info['border-left'] =
-        $this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
-
-        $this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(array(
-            'collapse', 'separate'));
-
-        $this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(array(
-            'top', 'bottom'));
-
-        $this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(array(
-            'auto', 'fixed'));
-
-        $this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('baseline', 'sub', 'super',
-                'top', 'text-top', 'middle', 'bottom', 'text-bottom')),
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage()
-        ));
-
-        $this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
-
-        // partial support
-        $this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(array('nowrap'));
-
-        if ($config->get('CSS.Proprietary')) {
-            $this->doSetupProprietary($config);
-        }
-
-        if ($config->get('CSS.AllowTricky')) {
-            $this->doSetupTricky($config);
-        }
-
-        $allow_important = $config->get('CSS.AllowImportant');
-        // wrap all attr-defs with decorator that handles !important
-        foreach ($this->info as $k => $v) {
-            $this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
-        }
-
-        $this->setupConfigStuff($config);
-    }
-
-    protected function doSetupProprietary($config) {
-        // Internet Explorer only scrollbar colors
-        $this->info['scrollbar-arrow-color']        = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-base-color']         = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-darkshadow-color']   = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-face-color']         = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-highlight-color']    = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-shadow-color']       = new HTMLPurifier_AttrDef_CSS_Color();
-
-        // technically not proprietary, but CSS3, and no one supports it
-        $this->info['opacity']          = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-        $this->info['-moz-opacity']     = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-        $this->info['-khtml-opacity']   = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-
-        // only opacity, for now
-        $this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
-
-    }
-
-    protected function doSetupTricky($config) {
-        $this->info['display'] = new HTMLPurifier_AttrDef_Enum(array(
-            'inline', 'block', 'list-item', 'run-in', 'compact',
-            'marker', 'table', 'inline-table', 'table-row-group',
-            'table-header-group', 'table-footer-group', 'table-row',
-            'table-column-group', 'table-column', 'table-cell', 'table-caption', 'none'
-        ));
-        $this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(array(
-            'visible', 'hidden', 'collapse'
-        ));
-        $this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
-    }
-
-
-    /**
-     * Performs extra config-based processing. Based off of
-     * HTMLPurifier_HTMLDefinition.
-     * @todo Refactor duplicate elements into common class (probably using
-     *       composition, not inheritance).
-     */
-    protected function setupConfigStuff($config) {
-
-        // setup allowed elements
-        $support = "(for information on implementing this, see the ".
-                   "support forums) ";
-        $allowed_attributes = $config->get('CSS.AllowedProperties');
-        if ($allowed_attributes !== null) {
-            foreach ($this->info as $name => $d) {
-                if(!isset($allowed_attributes[$name])) unset($this->info[$name]);
-                unset($allowed_attributes[$name]);
-            }
-            // emit errors
-            foreach ($allowed_attributes as $name => $d) {
-                // :TODO: Is this htmlspecialchars() call really necessary?
-                $name = htmlspecialchars($name);
-                trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
-            }
-        }
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef/Optional.php b/library/HTMLPurifier/ChildDef/Optional.php
deleted file mode 100644
index 32bcb9898e..0000000000
--- a/library/HTMLPurifier/ChildDef/Optional.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-/**
- * Definition that allows a set of elements, and allows no children.
- * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
- *       really, one shouldn't inherit from the other.  Only altered behavior
- *       is to overload a returned false with an array.  Thus, it will never
- *       return false.
- */
-class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
-{
-    public $allow_empty = true;
-    public $type = 'optional';
-    public function validateChildren($tokens_of_children, $config, $context) {
-        $result = parent::validateChildren($tokens_of_children, $config, $context);
-        // we assume that $tokens_of_children is not modified
-        if ($result === false) {
-            if (empty($tokens_of_children)) return true;
-            elseif ($this->whitespace) return $tokens_of_children;
-            else return array();
-        }
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef/Required.php b/library/HTMLPurifier/ChildDef/Required.php
deleted file mode 100644
index 4889f249b8..0000000000
--- a/library/HTMLPurifier/ChildDef/Required.php
+++ /dev/null
@@ -1,117 +0,0 @@
-<?php
-
-/**
- * Definition that allows a set of elements, but disallows empty children.
- */
-class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
-{
-    /**
-     * Lookup table of allowed elements.
-     * @public
-     */
-    public $elements = array();
-    /**
-     * Whether or not the last passed node was all whitespace.
-     */
-    protected $whitespace = false;
-    /**
-     * @param $elements List of allowed element names (lowercase).
-     */
-    public function __construct($elements) {
-        if (is_string($elements)) {
-            $elements = str_replace(' ', '', $elements);
-            $elements = explode('|', $elements);
-        }
-        $keys = array_keys($elements);
-        if ($keys == array_keys($keys)) {
-            $elements = array_flip($elements);
-            foreach ($elements as $i => $x) {
-                $elements[$i] = true;
-                if (empty($i)) unset($elements[$i]); // remove blank
-            }
-        }
-        $this->elements = $elements;
-    }
-    public $allow_empty = false;
-    public $type = 'required';
-    public function validateChildren($tokens_of_children, $config, $context) {
-        // Flag for subclasses
-        $this->whitespace = false;
-
-        // if there are no tokens, delete parent node
-        if (empty($tokens_of_children)) return false;
-
-        // the new set of children
-        $result = array();
-
-        // current depth into the nest
-        $nesting = 0;
-
-        // whether or not we're deleting a node
-        $is_deleting = false;
-
-        // whether or not parsed character data is allowed
-        // this controls whether or not we silently drop a tag
-        // or generate escaped HTML from it
-        $pcdata_allowed = isset($this->elements['#PCDATA']);
-
-        // a little sanity check to make sure it's not ALL whitespace
-        $all_whitespace = true;
-
-        // some configuration
-        $escape_invalid_children = $config->get('Core.EscapeInvalidChildren');
-
-        // generator
-        $gen = new HTMLPurifier_Generator($config, $context);
-
-        foreach ($tokens_of_children as $token) {
-            if (!empty($token->is_whitespace)) {
-                $result[] = $token;
-                continue;
-            }
-            $all_whitespace = false; // phew, we're not talking about whitespace
-
-            $is_child = ($nesting == 0);
-
-            if ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            if ($is_child) {
-                $is_deleting = false;
-                if (!isset($this->elements[$token->name])) {
-                    $is_deleting = true;
-                    if ($pcdata_allowed && $token instanceof HTMLPurifier_Token_Text) {
-                        $result[] = $token;
-                    } elseif ($pcdata_allowed && $escape_invalid_children) {
-                        $result[] = new HTMLPurifier_Token_Text(
-                            $gen->generateFromToken($token)
-                        );
-                    }
-                    continue;
-                }
-            }
-            if (!$is_deleting || ($pcdata_allowed && $token instanceof HTMLPurifier_Token_Text)) {
-                $result[] = $token;
-            } elseif ($pcdata_allowed && $escape_invalid_children) {
-                $result[] =
-                    new HTMLPurifier_Token_Text(
-                        $gen->generateFromToken($token)
-                    );
-            } else {
-                // drop silently
-            }
-        }
-        if (empty($result)) return false;
-        if ($all_whitespace) {
-            $this->whitespace = true;
-            return false;
-        }
-        if ($tokens_of_children == $result) return true;
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef/StrictBlockquote.php b/library/HTMLPurifier/ChildDef/StrictBlockquote.php
deleted file mode 100644
index dfae8a6e5e..0000000000
--- a/library/HTMLPurifier/ChildDef/StrictBlockquote.php
+++ /dev/null
@@ -1,88 +0,0 @@
-<?php
-
-/**
- * Takes the contents of blockquote when in strict and reformats for validation.
- */
-class HTMLPurifier_ChildDef_StrictBlockquote extends HTMLPurifier_ChildDef_Required
-{
-    protected $real_elements;
-    protected $fake_elements;
-    public $allow_empty = true;
-    public $type = 'strictblockquote';
-    protected $init = false;
-
-    /**
-     * @note We don't want MakeWellFormed to auto-close inline elements since
-     *       they might be allowed.
-     */
-    public function getAllowedElements($config) {
-        $this->init($config);
-        return $this->fake_elements;
-    }
-
-    public function validateChildren($tokens_of_children, $config, $context) {
-
-        $this->init($config);
-
-        // trick the parent class into thinking it allows more
-        $this->elements = $this->fake_elements;
-        $result = parent::validateChildren($tokens_of_children, $config, $context);
-        $this->elements = $this->real_elements;
-
-        if ($result === false) return array();
-        if ($result === true) $result = $tokens_of_children;
-
-        $def = $config->getHTMLDefinition();
-        $block_wrap_start = new HTMLPurifier_Token_Start($def->info_block_wrapper);
-        $block_wrap_end   = new HTMLPurifier_Token_End(  $def->info_block_wrapper);
-        $is_inline = false;
-        $depth = 0;
-        $ret = array();
-
-        // assuming that there are no comment tokens
-        foreach ($result as $i => $token) {
-            $token = $result[$i];
-            // ifs are nested for readability
-            if (!$is_inline) {
-                if (!$depth) {
-                     if (
-                        ($token instanceof HTMLPurifier_Token_Text && !$token->is_whitespace) ||
-                        (!$token instanceof HTMLPurifier_Token_Text && !isset($this->elements[$token->name]))
-                     ) {
-                        $is_inline = true;
-                        $ret[] = $block_wrap_start;
-                     }
-                }
-            } else {
-                if (!$depth) {
-                    // starting tokens have been inline text / empty
-                    if ($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) {
-                        if (isset($this->elements[$token->name])) {
-                            // ended
-                            $ret[] = $block_wrap_end;
-                            $is_inline = false;
-                        }
-                    }
-                }
-            }
-            $ret[] = $token;
-            if ($token instanceof HTMLPurifier_Token_Start) $depth++;
-            if ($token instanceof HTMLPurifier_Token_End)   $depth--;
-        }
-        if ($is_inline) $ret[] = $block_wrap_end;
-        return $ret;
-    }
-
-    private function init($config) {
-        if (!$this->init) {
-            $def = $config->getHTMLDefinition();
-            // allow all inline elements
-            $this->real_elements = $this->elements;
-            $this->fake_elements = $def->info_content_sets['Flow'];
-            $this->fake_elements['#PCDATA'] = true;
-            $this->init = true;
-        }
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef/Table.php b/library/HTMLPurifier/ChildDef/Table.php
deleted file mode 100644
index 34f0227dd2..0000000000
--- a/library/HTMLPurifier/ChildDef/Table.php
+++ /dev/null
@@ -1,142 +0,0 @@
-<?php
-
-/**
- * Definition for tables
- */
-class HTMLPurifier_ChildDef_Table extends HTMLPurifier_ChildDef
-{
-    public $allow_empty = false;
-    public $type = 'table';
-    public $elements = array('tr' => true, 'tbody' => true, 'thead' => true,
-        'tfoot' => true, 'caption' => true, 'colgroup' => true, 'col' => true);
-    public function __construct() {}
-    public function validateChildren($tokens_of_children, $config, $context) {
-        if (empty($tokens_of_children)) return false;
-
-        // this ensures that the loop gets run one last time before closing
-        // up. It's a little bit of a hack, but it works! Just make sure you
-        // get rid of the token later.
-        $tokens_of_children[] = false;
-
-        // only one of these elements is allowed in a table
-        $caption = false;
-        $thead   = false;
-        $tfoot   = false;
-
-        // as many of these as you want
-        $cols    = array();
-        $content = array();
-
-        $nesting = 0; // current depth so we can determine nodes
-        $is_collecting = false; // are we globbing together tokens to package
-                                // into one of the collectors?
-        $collection = array(); // collected nodes
-        $tag_index = 0; // the first node might be whitespace,
-                            // so this tells us where the start tag is
-
-        foreach ($tokens_of_children as $token) {
-            $is_child = ($nesting == 0);
-
-            if ($token === false) {
-                // terminating sequence started
-            } elseif ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            // handle node collection
-            if ($is_collecting) {
-                if ($is_child) {
-                    // okay, let's stash the tokens away
-                    // first token tells us the type of the collection
-                    switch ($collection[$tag_index]->name) {
-                        case 'tr':
-                        case 'tbody':
-                            $content[] = $collection;
-                            break;
-                        case 'caption':
-                            if ($caption !== false) break;
-                            $caption = $collection;
-                            break;
-                        case 'thead':
-                        case 'tfoot':
-                            // access the appropriate variable, $thead or $tfoot
-                            $var = $collection[$tag_index]->name;
-                            if ($$var === false) {
-                                $$var = $collection;
-                            } else {
-                                // transmutate the first and less entries into
-                                // tbody tags, and then put into content
-                                $collection[$tag_index]->name = 'tbody';
-                                $collection[count($collection)-1]->name = 'tbody';
-                                $content[] = $collection;
-                            }
-                            break;
-                         case 'colgroup':
-                            $cols[] = $collection;
-                            break;
-                    }
-                    $collection = array();
-                    $is_collecting = false;
-                    $tag_index = 0;
-                } else {
-                    // add the node to the collection
-                    $collection[] = $token;
-                }
-            }
-
-            // terminate
-            if ($token === false) break;
-
-            if ($is_child) {
-                // determine what we're dealing with
-                if ($token->name == 'col') {
-                    // the only empty tag in the possie, we can handle it
-                    // immediately
-                    $cols[] = array_merge($collection, array($token));
-                    $collection = array();
-                    $tag_index = 0;
-                    continue;
-                }
-                switch($token->name) {
-                    case 'caption':
-                    case 'colgroup':
-                    case 'thead':
-                    case 'tfoot':
-                    case 'tbody':
-                    case 'tr':
-                        $is_collecting = true;
-                        $collection[] = $token;
-                        continue;
-                    default:
-                        if (!empty($token->is_whitespace)) {
-                            $collection[] = $token;
-                            $tag_index++;
-                        }
-                        continue;
-                }
-            }
-        }
-
-        if (empty($content)) return false;
-
-        $ret = array();
-        if ($caption !== false) $ret = array_merge($ret, $caption);
-        if ($cols !== false)    foreach ($cols as $token_array) $ret = array_merge($ret, $token_array);
-        if ($thead !== false)   $ret = array_merge($ret, $thead);
-        if ($tfoot !== false)   $ret = array_merge($ret, $tfoot);
-        foreach ($content as $token_array) $ret = array_merge($ret, $token_array);
-        if (!empty($collection) && $is_collecting == false){
-            // grab the trailing space
-            $ret = array_merge($ret, $collection);
-        }
-
-        array_pop($tokens_of_children); // remove phantom token
-
-        return ($ret === $tokens_of_children) ? true : $ret;
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Config.php b/library/HTMLPurifier/Config.php
deleted file mode 100644
index 2a334b0d83..0000000000
--- a/library/HTMLPurifier/Config.php
+++ /dev/null
@@ -1,580 +0,0 @@
-<?php
-
-/**
- * Configuration object that triggers customizable behavior.
- *
- * @warning This class is strongly defined: that means that the class
- *          will fail if an undefined directive is retrieved or set.
- *
- * @note Many classes that could (although many times don't) use the
- *       configuration object make it a mandatory parameter.  This is
- *       because a configuration object should always be forwarded,
- *       otherwise, you run the risk of missing a parameter and then
- *       being stumped when a configuration directive doesn't work.
- *
- * @todo Reconsider some of the public member variables
- */
-class HTMLPurifier_Config
-{
-
-    /**
-     * HTML Purifier's version
-     */
-    public $version = '4.1.1';
-
-    /**
-     * Bool indicator whether or not to automatically finalize
-     * the object if a read operation is done
-     */
-    public $autoFinalize = true;
-
-    // protected member variables
-
-    /**
-     * Namespace indexed array of serials for specific namespaces (see
-     * getSerial() for more info).
-     */
-    protected $serials = array();
-
-    /**
-     * Serial for entire configuration object
-     */
-    protected $serial;
-
-    /**
-     * Parser for variables
-     */
-    protected $parser;
-
-    /**
-     * Reference HTMLPurifier_ConfigSchema for value checking
-     * @note This is public for introspective purposes. Please don't
-     *       abuse!
-     */
-    public $def;
-
-    /**
-     * Indexed array of definitions
-     */
-    protected $definitions;
-
-    /**
-     * Bool indicator whether or not config is finalized
-     */
-    protected $finalized = false;
-
-    /**
-     * Property list containing configuration directives.
-     */
-    protected $plist;
-
-    /**
-     * Whether or not a set is taking place due to an
-     * alias lookup.
-     */
-    private $aliasMode;
-
-    /**
-     * Set to false if you do not want line and file numbers in errors
-     * (useful when unit testing)
-     */
-    public $chatty = true;
-
-    /**
-     * Current lock; only gets to this namespace are allowed.
-     */
-    private $lock;
-
-    /**
-     * @param $definition HTMLPurifier_ConfigSchema that defines what directives
-     *                    are allowed.
-     */
-    public function __construct($definition, $parent = null) {
-        $parent = $parent ? $parent : $definition->defaultPlist;
-        $this->plist = new HTMLPurifier_PropertyList($parent);
-        $this->def = $definition; // keep a copy around for checking
-        $this->parser = new HTMLPurifier_VarParser_Flexible();
-    }
-
-    /**
-     * Convenience constructor that creates a config object based on a mixed var
-     * @param mixed $config Variable that defines the state of the config
-     *                      object. Can be: a HTMLPurifier_Config() object,
-     *                      an array of directives based on loadArray(),
-     *                      or a string filename of an ini file.
-     * @param HTMLPurifier_ConfigSchema Schema object
-     * @return Configured HTMLPurifier_Config object
-     */
-    public static function create($config, $schema = null) {
-        if ($config instanceof HTMLPurifier_Config) {
-            // pass-through
-            return $config;
-        }
-        if (!$schema) {
-            $ret = HTMLPurifier_Config::createDefault();
-        } else {
-            $ret = new HTMLPurifier_Config($schema);
-        }
-        if (is_string($config)) $ret->loadIni($config);
-        elseif (is_array($config)) $ret->loadArray($config);
-        return $ret;
-    }
-
-    /**
-     * Creates a new config object that inherits from a previous one.
-     * @param HTMLPurifier_Config $config Configuration object to inherit
-     *        from.
-     * @return HTMLPurifier_Config object with $config as its parent.
-     */
-    public static function inherit(HTMLPurifier_Config $config) {
-        return new HTMLPurifier_Config($config->def, $config->plist);
-    }
-
-    /**
-     * Convenience constructor that creates a default configuration object.
-     * @return Default HTMLPurifier_Config object.
-     */
-    public static function createDefault() {
-        $definition = HTMLPurifier_ConfigSchema::instance();
-        $config = new HTMLPurifier_Config($definition);
-        return $config;
-    }
-
-    /**
-     * Retreives a value from the configuration.
-     * @param $key String key
-     */
-    public function get($key, $a = null) {
-        if ($a !== null) {
-            $this->triggerError("Using deprecated API: use \$config->get('$key.$a') instead", E_USER_WARNING);
-            $key = "$key.$a";
-        }
-        if (!$this->finalized) $this->autoFinalize();
-        if (!isset($this->def->info[$key])) {
-            // can't add % due to SimpleTest bug
-            $this->triggerError('Cannot retrieve value of undefined directive ' . htmlspecialchars($key),
-                E_USER_WARNING);
-            return;
-        }
-        if (isset($this->def->info[$key]->isAlias)) {
-            $d = $this->def->info[$key];
-            $this->triggerError('Cannot get value from aliased directive, use real name ' . $d->key,
-                E_USER_ERROR);
-            return;
-        }
-        if ($this->lock) {
-            list($ns) = explode('.', $key);
-            if ($ns !== $this->lock) {
-                $this->triggerError('Cannot get value of namespace ' . $ns . ' when lock for ' . $this->lock . ' is active, this probably indicates a Definition setup method is accessing directives that are not within its namespace', E_USER_ERROR);
-                return;
-            }
-        }
-        return $this->plist->get($key);
-    }
-
-    /**
-     * Retreives an array of directives to values from a given namespace
-     * @param $namespace String namespace
-     */
-    public function getBatch($namespace) {
-        if (!$this->finalized) $this->autoFinalize();
-        $full = $this->getAll();
-        if (!isset($full[$namespace])) {
-            $this->triggerError('Cannot retrieve undefined namespace ' . htmlspecialchars($namespace),
-                E_USER_WARNING);
-            return;
-        }
-        return $full[$namespace];
-    }
-
-    /**
-     * Returns a md5 signature of a segment of the configuration object
-     * that uniquely identifies that particular configuration
-     * @note Revision is handled specially and is removed from the batch
-     *       before processing!
-     * @param $namespace Namespace to get serial for
-     */
-    public function getBatchSerial($namespace) {
-        if (empty($this->serials[$namespace])) {
-            $batch = $this->getBatch($namespace);
-            unset($batch['DefinitionRev']);
-            $this->serials[$namespace] = md5(serialize($batch));
-        }
-        return $this->serials[$namespace];
-    }
-
-    /**
-     * Returns a md5 signature for the entire configuration object
-     * that uniquely identifies that particular configuration
-     */
-    public function getSerial() {
-        if (empty($this->serial)) {
-            $this->serial = md5(serialize($this->getAll()));
-        }
-        return $this->serial;
-    }
-
-    /**
-     * Retrieves all directives, organized by namespace
-     * @warning This is a pretty inefficient function, avoid if you can
-     */
-    public function getAll() {
-        if (!$this->finalized) $this->autoFinalize();
-        $ret = array();
-        foreach ($this->plist->squash() as $name => $value) {
-            list($ns, $key) = explode('.', $name, 2);
-            $ret[$ns][$key] = $value;
-        }
-        return $ret;
-    }
-
-    /**
-     * Sets a value to configuration.
-     * @param $key String key
-     * @param $value Mixed value
-     */
-    public function set($key, $value, $a = null) {
-        if (strpos($key, '.') === false) {
-            $namespace = $key;
-            $directive = $value;
-            $value = $a;
-            $key = "$key.$directive";
-            $this->triggerError("Using deprecated API: use \$config->set('$key', ...) instead", E_USER_NOTICE);
-        } else {
-            list($namespace) = explode('.', $key);
-        }
-        if ($this->isFinalized('Cannot set directive after finalization')) return;
-        if (!isset($this->def->info[$key])) {
-            $this->triggerError('Cannot set undefined directive ' . htmlspecialchars($key) . ' to value',
-                E_USER_WARNING);
-            return;
-        }
-        $def = $this->def->info[$key];
-
-        if (isset($def->isAlias)) {
-            if ($this->aliasMode) {
-                $this->triggerError('Double-aliases not allowed, please fix '.
-                    'ConfigSchema bug with' . $key, E_USER_ERROR);
-                return;
-            }
-            $this->aliasMode = true;
-            $this->set($def->key, $value);
-            $this->aliasMode = false;
-            $this->triggerError("$key is an alias, preferred directive name is {$def->key}", E_USER_NOTICE);
-            return;
-        }
-
-        // Raw type might be negative when using the fully optimized form
-        // of stdclass, which indicates allow_null == true
-        $rtype = is_int($def) ? $def : $def->type;
-        if ($rtype < 0) {
-            $type = -$rtype;
-            $allow_null = true;
-        } else {
-            $type = $rtype;
-            $allow_null = isset($def->allow_null);
-        }
-
-        try {
-            $value = $this->parser->parse($value, $type, $allow_null);
-        } catch (HTMLPurifier_VarParserException $e) {
-            $this->triggerError('Value for ' . $key . ' is of invalid type, should be ' . HTMLPurifier_VarParser::getTypeName($type), E_USER_WARNING);
-            return;
-        }
-        if (is_string($value) && is_object($def)) {
-            // resolve value alias if defined
-            if (isset($def->aliases[$value])) {
-                $value = $def->aliases[$value];
-            }
-            // check to see if the value is allowed
-            if (isset($def->allowed) && !isset($def->allowed[$value])) {
-                $this->triggerError('Value not supported, valid values are: ' .
-                    $this->_listify($def->allowed), E_USER_WARNING);
-                return;
-            }
-        }
-        $this->plist->set($key, $value);
-
-        // reset definitions if the directives they depend on changed
-        // this is a very costly process, so it's discouraged
-        // with finalization
-        if ($namespace == 'HTML' || $namespace == 'CSS' || $namespace == 'URI') {
-            $this->definitions[$namespace] = null;
-        }
-
-        $this->serials[$namespace] = false;
-    }
-
-    /**
-     * Convenience function for error reporting
-     */
-    private function _listify($lookup) {
-        $list = array();
-        foreach ($lookup as $name => $b) $list[] = $name;
-        return implode(', ', $list);
-    }
-
-    /**
-     * Retrieves object reference to the HTML definition.
-     * @param $raw Return a copy that has not been setup yet. Must be
-     *             called before it's been setup, otherwise won't work.
-     */
-    public function getHTMLDefinition($raw = false) {
-        return $this->getDefinition('HTML', $raw);
-    }
-
-    /**
-     * Retrieves object reference to the CSS definition
-     * @param $raw Return a copy that has not been setup yet. Must be
-     *             called before it's been setup, otherwise won't work.
-     */
-    public function getCSSDefinition($raw = false) {
-        return $this->getDefinition('CSS', $raw);
-    }
-
-    /**
-     * Retrieves a definition
-     * @param $type Type of definition: HTML, CSS, etc
-     * @param $raw  Whether or not definition should be returned raw
-     */
-    public function getDefinition($type, $raw = false) {
-        if (!$this->finalized) $this->autoFinalize();
-        // temporarily suspend locks, so we can handle recursive definition calls
-        $lock = $this->lock;
-        $this->lock = null;
-        $factory = HTMLPurifier_DefinitionCacheFactory::instance();
-        $cache = $factory->create($type, $this);
-        $this->lock = $lock;
-        if (!$raw) {
-            // see if we can quickly supply a definition
-            if (!empty($this->definitions[$type])) {
-                if (!$this->definitions[$type]->setup) {
-                    $this->definitions[$type]->setup($this);
-                    $cache->set($this->definitions[$type], $this);
-                }
-                return $this->definitions[$type];
-            }
-            // memory check missed, try cache
-            $this->definitions[$type] = $cache->get($this);
-            if ($this->definitions[$type]) {
-                // definition in cache, return it
-                return $this->definitions[$type];
-            }
-        } elseif (
-            !empty($this->definitions[$type]) &&
-            !$this->definitions[$type]->setup
-        ) {
-            // raw requested, raw in memory, quick return
-            return $this->definitions[$type];
-        }
-        // quick checks failed, let's create the object
-        if ($type == 'HTML') {
-            $this->definitions[$type] = new HTMLPurifier_HTMLDefinition();
-        } elseif ($type == 'CSS') {
-            $this->definitions[$type] = new HTMLPurifier_CSSDefinition();
-        } elseif ($type == 'URI') {
-            $this->definitions[$type] = new HTMLPurifier_URIDefinition();
-        } else {
-            throw new HTMLPurifier_Exception("Definition of $type type not supported");
-        }
-        // quick abort if raw
-        if ($raw) {
-            if (is_null($this->get($type . '.DefinitionID'))) {
-                // fatally error out if definition ID not set
-                throw new HTMLPurifier_Exception("Cannot retrieve raw version without specifying %$type.DefinitionID");
-            }
-            return $this->definitions[$type];
-        }
-        // set it up
-        $this->lock = $type;
-        $this->definitions[$type]->setup($this);
-        $this->lock = null;
-        // save in cache
-        $cache->set($this->definitions[$type], $this);
-        return $this->definitions[$type];
-    }
-
-    /**
-     * Loads configuration values from an array with the following structure:
-     * Namespace.Directive => Value
-     * @param $config_array Configuration associative array
-     */
-    public function loadArray($config_array) {
-        if ($this->isFinalized('Cannot load directives after finalization')) return;
-        foreach ($config_array as $key => $value) {
-            $key = str_replace('_', '.', $key);
-            if (strpos($key, '.') !== false) {
-                $this->set($key, $value);
-            } else {
-                $namespace = $key;
-                $namespace_values = $value;
-                foreach ($namespace_values as $directive => $value) {
-                    $this->set($namespace .'.'. $directive, $value);
-                }
-            }
-        }
-    }
-
-    /**
-     * Returns a list of array(namespace, directive) for all directives
-     * that are allowed in a web-form context as per an allowed
-     * namespaces/directives list.
-     * @param $allowed List of allowed namespaces/directives
-     */
-    public static function getAllowedDirectivesForForm($allowed, $schema = null) {
-        if (!$schema) {
-            $schema = HTMLPurifier_ConfigSchema::instance();
-        }
-        if ($allowed !== true) {
-             if (is_string($allowed)) $allowed = array($allowed);
-             $allowed_ns = array();
-             $allowed_directives = array();
-             $blacklisted_directives = array();
-             foreach ($allowed as $ns_or_directive) {
-                 if (strpos($ns_or_directive, '.') !== false) {
-                     // directive
-                     if ($ns_or_directive[0] == '-') {
-                         $blacklisted_directives[substr($ns_or_directive, 1)] = true;
-                     } else {
-                         $allowed_directives[$ns_or_directive] = true;
-                     }
-                 } else {
-                     // namespace
-                     $allowed_ns[$ns_or_directive] = true;
-                 }
-             }
-        }
-        $ret = array();
-        foreach ($schema->info as $key => $def) {
-            list($ns, $directive) = explode('.', $key, 2);
-            if ($allowed !== true) {
-                if (isset($blacklisted_directives["$ns.$directive"])) continue;
-                if (!isset($allowed_directives["$ns.$directive"]) && !isset($allowed_ns[$ns])) continue;
-            }
-            if (isset($def->isAlias)) continue;
-            if ($directive == 'DefinitionID' || $directive == 'DefinitionRev') continue;
-            $ret[] = array($ns, $directive);
-        }
-        return $ret;
-    }
-
-    /**
-     * Loads configuration values from $_GET/$_POST that were posted
-     * via ConfigForm
-     * @param $array $_GET or $_POST array to import
-     * @param $index Index/name that the config variables are in
-     * @param $allowed List of allowed namespaces/directives
-     * @param $mq_fix Boolean whether or not to enable magic quotes fix
-     * @param $schema Instance of HTMLPurifier_ConfigSchema to use, if not global copy
-     */
-    public static function loadArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
-        $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $schema);
-        $config = HTMLPurifier_Config::create($ret, $schema);
-        return $config;
-    }
-
-    /**
-     * Merges in configuration values from $_GET/$_POST to object. NOT STATIC.
-     * @note Same parameters as loadArrayFromForm
-     */
-    public function mergeArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true) {
-         $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $this->def);
-         $this->loadArray($ret);
-    }
-
-    /**
-     * Prepares an array from a form into something usable for the more
-     * strict parts of HTMLPurifier_Config
-     */
-    public static function prepareArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
-        if ($index !== false) $array = (isset($array[$index]) && is_array($array[$index])) ? $array[$index] : array();
-        $mq = $mq_fix && function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc();
-
-        $allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed, $schema);
-        $ret = array();
-        foreach ($allowed as $key) {
-            list($ns, $directive) = $key;
-            $skey = "$ns.$directive";
-            if (!empty($array["Null_$skey"])) {
-                $ret[$ns][$directive] = null;
-                continue;
-            }
-            if (!isset($array[$skey])) continue;
-            $value = $mq ? stripslashes($array[$skey]) : $array[$skey];
-            $ret[$ns][$directive] = $value;
-        }
-        return $ret;
-    }
-
-    /**
-     * Loads configuration values from an ini file
-     * @param $filename Name of ini file
-     */
-    public function loadIni($filename) {
-        if ($this->isFinalized('Cannot load directives after finalization')) return;
-        $array = parse_ini_file($filename, true);
-        $this->loadArray($array);
-    }
-
-    /**
-     * Checks whether or not the configuration object is finalized.
-     * @param $error String error message, or false for no error
-     */
-    public function isFinalized($error = false) {
-        if ($this->finalized && $error) {
-            $this->triggerError($error, E_USER_ERROR);
-        }
-        return $this->finalized;
-    }
-
-    /**
-     * Finalizes configuration only if auto finalize is on and not
-     * already finalized
-     */
-    public function autoFinalize() {
-        if ($this->autoFinalize) {
-            $this->finalize();
-        } else {
-            $this->plist->squash(true);
-        }
-    }
-
-    /**
-     * Finalizes a configuration object, prohibiting further change
-     */
-    public function finalize() {
-        $this->finalized = true;
-        unset($this->parser);
-    }
-
-    /**
-     * Produces a nicely formatted error message by supplying the
-     * stack frame information from two levels up and OUTSIDE of
-     * HTMLPurifier_Config.
-     */
-    protected function triggerError($msg, $no) {
-        // determine previous stack frame
-        $backtrace = debug_backtrace();
-        if ($this->chatty && isset($backtrace[1])) {
-            $frame = $backtrace[1];
-            $extra = " on line {$frame['line']} in file {$frame['file']}";
-        } else {
-            $extra = '';
-        }
-        trigger_error($msg . $extra, $no);
-    }
-
-    /**
-     * Returns a serialized form of the configuration object that can
-     * be reconstituted.
-     */
-    public function serialize() {
-        $this->getDefinition('HTML');
-        $this->getDefinition('CSS');
-        $this->getDefinition('URI');
-        return serialize($this);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php b/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php
deleted file mode 100644
index b95aea18cc..0000000000
--- a/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-/**
- * Fluent interface for validating the contents of member variables.
- * This should be immutable. See HTMLPurifier_ConfigSchema_Validator for
- * use-cases. We name this an 'atom' because it's ONLY for validations that
- * are independent and usually scalar.
- */
-class HTMLPurifier_ConfigSchema_ValidatorAtom
-{
-
-    protected $context, $obj, $member, $contents;
-
-    public function __construct($context, $obj, $member) {
-        $this->context     = $context;
-        $this->obj         = $obj;
-        $this->member      = $member;
-        $this->contents    =& $obj->$member;
-    }
-
-    public function assertIsString() {
-        if (!is_string($this->contents)) $this->error('must be a string');
-        return $this;
-    }
-
-    public function assertIsBool() {
-        if (!is_bool($this->contents)) $this->error('must be a boolean');
-        return $this;
-    }
-
-    public function assertIsArray() {
-        if (!is_array($this->contents)) $this->error('must be an array');
-        return $this;
-    }
-
-    public function assertNotNull() {
-        if ($this->contents === null) $this->error('must not be null');
-        return $this;
-    }
-
-    public function assertAlnum() {
-        $this->assertIsString();
-        if (!ctype_alnum($this->contents)) $this->error('must be alphanumeric');
-        return $this;
-    }
-
-    public function assertNotEmpty() {
-        if (empty($this->contents)) $this->error('must not be empty');
-        return $this;
-    }
-
-    public function assertIsLookup() {
-        $this->assertIsArray();
-        foreach ($this->contents as $v) {
-            if ($v !== true) $this->error('must be a lookup array');
-        }
-        return $this;
-    }
-
-    protected function error($msg) {
-        throw new HTMLPurifier_ConfigSchema_Exception(ucfirst($this->member) . ' in ' . $this->context . ' ' . $msg);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema.ser b/library/HTMLPurifier/ConfigSchema/schema.ser
deleted file mode 100644
index 22b8d54a59..0000000000
Binary files a/library/HTMLPurifier/ConfigSchema/schema.ser and /dev/null differ
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt b/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
deleted file mode 100644
index 888d558196..0000000000
--- a/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-HTML.AllowedElements
-TYPE: lookup/null
-VERSION: 1.3.0
-DEFAULT: NULL
---DESCRIPTION--
-<p>
-    If HTML Purifier's tag set is unsatisfactory for your needs, you
-    can overload it with your own list of tags to allow.  Note that this
-    method is subtractive: it does its job by taking away from HTML Purifier
-    usual feature set, so you cannot add a tag that HTML Purifier never
-    supported in the first place (like embed, form or head).  If you
-    change this, you probably also want to change %HTML.AllowedAttributes.
-</p>
-<p>
-    <strong>Warning:</strong> If another directive conflicts with the
-    elements here, <em>that</em> directive will win and override.
-</p>
---# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Context.php b/library/HTMLPurifier/Context.php
deleted file mode 100644
index 9ddf0c5476..0000000000
--- a/library/HTMLPurifier/Context.php
+++ /dev/null
@@ -1,82 +0,0 @@
-<?php
-
-/**
- * Registry object that contains information about the current context.
- * @warning Is a bit buggy when variables are set to null: it thinks
- *          they don't exist! So use false instead, please.
- * @note Since the variables Context deals with may not be objects,
- *       references are very important here! Do not remove!
- */
-class HTMLPurifier_Context
-{
-
-    /**
-     * Private array that stores the references.
-     */
-    private $_storage = array();
-
-    /**
-     * Registers a variable into the context.
-     * @param $name String name
-     * @param $ref Reference to variable to be registered
-     */
-    public function register($name, &$ref) {
-        if (isset($this->_storage[$name])) {
-            trigger_error("Name $name produces collision, cannot re-register",
-                          E_USER_ERROR);
-            return;
-        }
-        $this->_storage[$name] =& $ref;
-    }
-
-    /**
-     * Retrieves a variable reference from the context.
-     * @param $name String name
-     * @param $ignore_error Boolean whether or not to ignore error
-     */
-    public function &get($name, $ignore_error = false) {
-        if (!isset($this->_storage[$name])) {
-            if (!$ignore_error) {
-                trigger_error("Attempted to retrieve non-existent variable $name",
-                              E_USER_ERROR);
-            }
-            $var = null; // so we can return by reference
-            return $var;
-        }
-        return $this->_storage[$name];
-    }
-
-    /**
-     * Destorys a variable in the context.
-     * @param $name String name
-     */
-    public function destroy($name) {
-        if (!isset($this->_storage[$name])) {
-            trigger_error("Attempted to destroy non-existent variable $name",
-                          E_USER_ERROR);
-            return;
-        }
-        unset($this->_storage[$name]);
-    }
-
-    /**
-     * Checks whether or not the variable exists.
-     * @param $name String name
-     */
-    public function exists($name) {
-        return isset($this->_storage[$name]);
-    }
-
-    /**
-     * Loads a series of variables from an associative array
-     * @param $context_array Assoc array of variables to load
-     */
-    public function loadArray($context_array) {
-        foreach ($context_array as $key => $discard) {
-            $this->register($key, $context_array[$key]);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Definition.php b/library/HTMLPurifier/Definition.php
deleted file mode 100644
index a7408c9749..0000000000
--- a/library/HTMLPurifier/Definition.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Super-class for definition datatype objects, implements serialization
- * functions for the class.
- */
-abstract class HTMLPurifier_Definition
-{
-
-    /**
-     * Has setup() been called yet?
-     */
-    public $setup = false;
-
-    /**
-     * What type of definition is it?
-     */
-    public $type;
-
-    /**
-     * Sets up the definition object into the final form, something
-     * not done by the constructor
-     * @param $config HTMLPurifier_Config instance
-     */
-    abstract protected function doSetup($config);
-
-    /**
-     * Setup function that aborts if already setup
-     * @param $config HTMLPurifier_Config instance
-     */
-    public function setup($config) {
-        if ($this->setup) return;
-        $this->setup = true;
-        $this->doSetup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Decorator.php b/library/HTMLPurifier/DefinitionCache/Decorator.php
deleted file mode 100644
index b0fb6d0cd6..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Decorator.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-class HTMLPurifier_DefinitionCache_Decorator extends HTMLPurifier_DefinitionCache
-{
-
-    /**
-     * Cache object we are decorating
-     */
-    public $cache;
-
-    public function __construct() {}
-
-    /**
-     * Lazy decorator function
-     * @param $cache Reference to cache object to decorate
-     */
-    public function decorate(&$cache) {
-        $decorator = $this->copy();
-        // reference is necessary for mocks in PHP 4
-        $decorator->cache =& $cache;
-        $decorator->type  = $cache->type;
-        return $decorator;
-    }
-
-    /**
-     * Cross-compatible clone substitute
-     */
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator();
-    }
-
-    public function add($def, $config) {
-        return $this->cache->add($def, $config);
-    }
-
-    public function set($def, $config) {
-        return $this->cache->set($def, $config);
-    }
-
-    public function replace($def, $config) {
-        return $this->cache->replace($def, $config);
-    }
-
-    public function get($config) {
-        return $this->cache->get($config);
-    }
-
-    public function remove($config) {
-        return $this->cache->remove($config);
-    }
-
-    public function flush($config) {
-        return $this->cache->flush($config);
-    }
-
-    public function cleanup($config) {
-        return $this->cache->cleanup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php b/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
deleted file mode 100644
index d4cc35c4bc..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-/**
- * Definition cache decorator class that cleans up the cache
- * whenever there is a cache miss.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Cleanup extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    public $name = 'Cleanup';
-
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator_Cleanup();
-    }
-
-    public function add($def, $config) {
-        $status = parent::add($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function set($def, $config) {
-        $status = parent::set($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function replace($def, $config) {
-        $status = parent::replace($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function get($config) {
-        $ret = parent::get($config);
-        if (!$ret) parent::cleanup($config);
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php b/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php
deleted file mode 100644
index 18f16d32b6..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-/**
- * Definition cache decorator class that saves all cache retrievals
- * to PHP's memory; good for unit tests or circumstances where
- * there are lots of configuration objects floating around.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Memory extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    protected $definitions;
-    public $name = 'Memory';
-
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator_Memory();
-    }
-
-    public function add($def, $config) {
-        $status = parent::add($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function set($def, $config) {
-        $status = parent::set($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function replace($def, $config) {
-        $status = parent::replace($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function get($config) {
-        $key = $this->generateKey($config);
-        if (isset($this->definitions[$key])) return $this->definitions[$key];
-        $this->definitions[$key] = parent::get($config);
-        return $this->definitions[$key];
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in b/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
deleted file mode 100644
index 21a8fcfda2..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
-
-/**
- * Definition cache decorator template.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Template extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    var $name = 'Template'; // replace this
-
-    function copy() {
-        // replace class name with yours
-        return new HTMLPurifier_DefinitionCache_Decorator_Template();
-    }
-
-    // remove methods you don't need
-
-    function add($def, $config) {
-        return parent::add($def, $config);
-    }
-
-    function set($def, $config) {
-        return parent::set($def, $config);
-    }
-
-    function replace($def, $config) {
-        return parent::replace($def, $config);
-    }
-
-    function get($config) {
-        return parent::get($config);
-    }
-
-    function flush() {
-        return parent::flush();
-    }
-
-    function cleanup($config) {
-        return parent::cleanup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Null.php b/library/HTMLPurifier/DefinitionCache/Null.php
deleted file mode 100644
index 41d97e734f..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Null.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Null cache object to use when no caching is on.
- */
-class HTMLPurifier_DefinitionCache_Null extends HTMLPurifier_DefinitionCache
-{
-
-    public function add($def, $config) {
-        return false;
-    }
-
-    public function set($def, $config) {
-        return false;
-    }
-
-    public function replace($def, $config) {
-        return false;
-    }
-
-    public function remove($config) {
-        return false;
-    }
-
-    public function get($config) {
-        return false;
-    }
-
-    public function flush($config) {
-        return false;
-    }
-
-    public function cleanup($config) {
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Serializer.php b/library/HTMLPurifier/DefinitionCache/Serializer.php
deleted file mode 100644
index 7a6aa93f02..0000000000
--- a/library/HTMLPurifier/DefinitionCache/Serializer.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-
-class HTMLPurifier_DefinitionCache_Serializer extends
-      HTMLPurifier_DefinitionCache
-{
-
-    public function add($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (file_exists($file)) return false;
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function set($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function replace($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function get($config) {
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        return unserialize(file_get_contents($file));
-    }
-
-    public function remove($config) {
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        return unlink($file);
-    }
-
-    public function flush($config) {
-        if (!$this->_prepareDir($config)) return false;
-        $dir = $this->generateDirectoryPath($config);
-        $dh  = opendir($dir);
-        while (false !== ($filename = readdir($dh))) {
-            if (empty($filename)) continue;
-            if ($filename[0] === '.') continue;
-            unlink($dir . '/' . $filename);
-        }
-    }
-
-    public function cleanup($config) {
-        if (!$this->_prepareDir($config)) return false;
-        $dir = $this->generateDirectoryPath($config);
-        $dh  = opendir($dir);
-        while (false !== ($filename = readdir($dh))) {
-            if (empty($filename)) continue;
-            if ($filename[0] === '.') continue;
-            $key = substr($filename, 0, strlen($filename) - 4);
-            if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
-        }
-    }
-
-    /**
-     * Generates the file path to the serial file corresponding to
-     * the configuration and definition name
-     * @todo Make protected
-     */
-    public function generateFilePath($config) {
-        $key = $this->generateKey($config);
-        return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
-    }
-
-    /**
-     * Generates the path to the directory contain this cache's serial files
-     * @note No trailing slash
-     * @todo Make protected
-     */
-    public function generateDirectoryPath($config) {
-        $base = $this->generateBaseDirectoryPath($config);
-        return $base . '/' . $this->type;
-    }
-
-    /**
-     * Generates path to base directory that contains all definition type
-     * serials
-     * @todo Make protected
-     */
-    public function generateBaseDirectoryPath($config) {
-        $base = $config->get('Cache.SerializerPath');
-        $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
-        return $base;
-    }
-
-    /**
-     * Convenience wrapper function for file_put_contents
-     * @param $file File name to write to
-     * @param $data Data to write into file
-     * @return Number of bytes written if success, or false if failure.
-     */
-    private function _write($file, $data) {
-        return file_put_contents($file, $data);
-    }
-
-    /**
-     * Prepares the directory that this type stores the serials in
-     * @return True if successful
-     */
-    private function _prepareDir($config) {
-        $directory = $this->generateDirectoryPath($config);
-        if (!is_dir($directory)) {
-            $base = $this->generateBaseDirectoryPath($config);
-            if (!is_dir($base)) {
-                trigger_error('Base directory '.$base.' does not exist,
-                    please create or change using %Cache.SerializerPath',
-                    E_USER_WARNING);
-                return false;
-            } elseif (!$this->_testPermissions($base)) {
-                return false;
-            }
-            $old = umask(0022); // disable group and world writes
-            mkdir($directory);
-            umask($old);
-        } elseif (!$this->_testPermissions($directory)) {
-            return false;
-        }
-        return true;
-    }
-
-    /**
-     * Tests permissions on a directory and throws out friendly
-     * error messages and attempts to chmod it itself if possible
-     */
-    private function _testPermissions($dir) {
-        // early abort, if it is writable, everything is hunky-dory
-        if (is_writable($dir)) return true;
-        if (!is_dir($dir)) {
-            // generally, you'll want to handle this beforehand
-            // so a more specific error message can be given
-            trigger_error('Directory '.$dir.' does not exist',
-                E_USER_WARNING);
-            return false;
-        }
-        if (function_exists('posix_getuid')) {
-            // POSIX system, we can give more specific advice
-            if (fileowner($dir) === posix_getuid()) {
-                // we can chmod it ourselves
-                chmod($dir, 0755);
-                return true;
-            } elseif (filegroup($dir) === posix_getgid()) {
-                $chmod = '775';
-            } else {
-                // PHP's probably running as nobody, so we'll
-                // need to give global permissions
-                $chmod = '777';
-            }
-            trigger_error('Directory '.$dir.' not writable, '.
-                'please chmod to ' . $chmod,
-                E_USER_WARNING);
-        } else {
-            // generic error message
-            trigger_error('Directory '.$dir.' not writable, '.
-                'please alter file permissions',
-                E_USER_WARNING);
-        }
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/EntityLookup/entities.ser b/library/HTMLPurifier/EntityLookup/entities.ser
deleted file mode 100644
index f2b8b8f2db..0000000000
--- a/library/HTMLPurifier/EntityLookup/entities.ser
+++ /dev/null
@@ -1 +0,0 @@
-a:246:{s:4:"nbsp";s:2:" ";s:5:"iexcl";s:2:"¡";s:4:"cent";s:2:"¢";s:5:"pound";s:2:"£";s:6:"curren";s:2:"¤";s:3:"yen";s:2:"¥";s:6:"brvbar";s:2:"¦";s:4:"sect";s:2:"§";s:3:"uml";s:2:"¨";s:4:"copy";s:2:"©";s:4:"ordf";s:2:"ª";s:5:"laquo";s:2:"«";s:3:"not";s:2:"¬";s:3:"shy";s:2:"­";s:3:"reg";s:2:"®";s:4:"macr";s:2:"¯";s:3:"deg";s:2:"°";s:6:"plusmn";s:2:"±";s:5:"acute";s:2:"´";s:5:"micro";s:2:"µ";s:4:"para";s:2:"¶";s:6:"middot";s:2:"·";s:5:"cedil";s:2:"¸";s:4:"ordm";s:2:"º";s:5:"raquo";s:2:"»";s:6:"iquest";s:2:"¿";s:6:"Agrave";s:2:"À";s:6:"Aacute";s:2:"Á";s:5:"Acirc";s:2:"Â";s:6:"Atilde";s:2:"Ã";s:4:"Auml";s:2:"Ä";s:5:"Aring";s:2:"Å";s:5:"AElig";s:2:"Æ";s:6:"Ccedil";s:2:"Ç";s:6:"Egrave";s:2:"È";s:6:"Eacute";s:2:"É";s:5:"Ecirc";s:2:"Ê";s:4:"Euml";s:2:"Ë";s:6:"Igrave";s:2:"Ì";s:6:"Iacute";s:2:"Í";s:5:"Icirc";s:2:"Î";s:4:"Iuml";s:2:"Ï";s:3:"ETH";s:2:"Ð";s:6:"Ntilde";s:2:"Ñ";s:6:"Ograve";s:2:"Ò";s:6:"Oacute";s:2:"Ó";s:5:"Ocirc";s:2:"Ô";s:6:"Otilde";s:2:"Õ";s:4:"Ouml";s:2:"Ö";s:5:"times";s:2:"×";s:6:"Oslash";s:2:"Ø";s:6:"Ugrave";s:2:"Ù";s:6:"Uacute";s:2:"Ú";s:5:"Ucirc";s:2:"Û";s:4:"Uuml";s:2:"Ü";s:6:"Yacute";s:2:"Ý";s:5:"THORN";s:2:"Þ";s:5:"szlig";s:2:"ß";s:6:"agrave";s:2:"à";s:6:"aacute";s:2:"á";s:5:"acirc";s:2:"â";s:6:"atilde";s:2:"ã";s:4:"auml";s:2:"ä";s:5:"aring";s:2:"å";s:5:"aelig";s:2:"æ";s:6:"ccedil";s:2:"ç";s:6:"egrave";s:2:"è";s:6:"eacute";s:2:"é";s:5:"ecirc";s:2:"ê";s:4:"euml";s:2:"ë";s:6:"igrave";s:2:"ì";s:6:"iacute";s:2:"í";s:5:"icirc";s:2:"î";s:4:"iuml";s:2:"ï";s:3:"eth";s:2:"ð";s:6:"ntilde";s:2:"ñ";s:6:"ograve";s:2:"ò";s:6:"oacute";s:2:"ó";s:5:"ocirc";s:2:"ô";s:6:"otilde";s:2:"õ";s:4:"ouml";s:2:"ö";s:6:"divide";s:2:"÷";s:6:"oslash";s:2:"ø";s:6:"ugrave";s:2:"ù";s:6:"uacute";s:2:"ú";s:5:"ucirc";s:2:"û";s:4:"uuml";s:2:"ü";s:6:"yacute";s:2:"ý";s:5:"thorn";s:2:"þ";s:4:"yuml";s:2:"ÿ";s:4:"quot";s:1:""";s:3:"amp";s:1:"&";s:2:"lt";s:1:"<";s:2:"gt";s:1:">";s:4:"apos";s:1:"'";s:5:"OElig";s:2:"Œ";s:5:"oelig";s:2:"œ";s:6:"Scaron";s:2:"Š";s:6:"scaron";s:2:"š";s:4:"Yuml";s:2:"Ÿ";s:4:"circ";s:2:"ˆ";s:5:"tilde";s:2:"˜";s:4:"ensp";s:3:" ";s:4:"emsp";s:3:" ";s:6:"thinsp";s:3:" ";s:4:"zwnj";s:3:"‌";s:3:"zwj";s:3:"‍";s:3:"lrm";s:3:"‎";s:3:"rlm";s:3:"‏";s:5:"ndash";s:3:"–";s:5:"mdash";s:3:"—";s:5:"lsquo";s:3:"‘";s:5:"rsquo";s:3:"’";s:5:"sbquo";s:3:"‚";s:5:"ldquo";s:3:"“";s:5:"rdquo";s:3:"”";s:5:"bdquo";s:3:"„";s:6:"dagger";s:3:"†";s:6:"Dagger";s:3:"‡";s:6:"permil";s:3:"‰";s:6:"lsaquo";s:3:"‹";s:6:"rsaquo";s:3:"›";s:4:"euro";s:3:"€";s:4:"fnof";s:2:"ƒ";s:5:"Alpha";s:2:"Α";s:4:"Beta";s:2:"Β";s:5:"Gamma";s:2:"Γ";s:5:"Delta";s:2:"Δ";s:7:"Epsilon";s:2:"Ε";s:4:"Zeta";s:2:"Ζ";s:3:"Eta";s:2:"Η";s:5:"Theta";s:2:"Θ";s:4:"Iota";s:2:"Ι";s:5:"Kappa";s:2:"Κ";s:6:"Lambda";s:2:"Λ";s:2:"Mu";s:2:"Μ";s:2:"Nu";s:2:"Ν";s:2:"Xi";s:2:"Ξ";s:7:"Omicron";s:2:"Ο";s:2:"Pi";s:2:"Π";s:3:"Rho";s:2:"Ρ";s:5:"Sigma";s:2:"Σ";s:3:"Tau";s:2:"Τ";s:7:"Upsilon";s:2:"Υ";s:3:"Phi";s:2:"Φ";s:3:"Chi";s:2:"Χ";s:3:"Psi";s:2:"Ψ";s:5:"Omega";s:2:"Ω";s:5:"alpha";s:2:"α";s:4:"beta";s:2:"β";s:5:"gamma";s:2:"γ";s:5:"delta";s:2:"δ";s:7:"epsilon";s:2:"ε";s:4:"zeta";s:2:"ζ";s:3:"eta";s:2:"η";s:5:"theta";s:2:"θ";s:4:"iota";s:2:"ι";s:5:"kappa";s:2:"κ";s:6:"lambda";s:2:"λ";s:2:"mu";s:2:"μ";s:2:"nu";s:2:"ν";s:2:"xi";s:2:"ξ";s:7:"omicron";s:2:"ο";s:2:"pi";s:2:"π";s:3:"rho";s:2:"ρ";s:6:"sigmaf";s:2:"ς";s:5:"sigma";s:2:"σ";s:3:"tau";s:2:"τ";s:7:"upsilon";s:2:"υ";s:3:"phi";s:2:"φ";s:3:"chi";s:2:"χ";s:3:"psi";s:2:"ψ";s:5:"omega";s:2:"ω";s:8:"thetasym";s:2:"ϑ";s:5:"upsih";s:2:"ϒ";s:3:"piv";s:2:"ϖ";s:4:"bull";s:3:"•";s:6:"hellip";s:3:"…";s:5:"prime";s:3:"′";s:5:"Prime";s:3:"″";s:5:"oline";s:3:"‾";s:5:"frasl";s:3:"⁄";s:6:"weierp";s:3:"℘";s:5:"image";s:3:"ℑ";s:4:"real";s:3:"ℜ";s:5:"trade";s:3:"™";s:7:"alefsym";s:3:"ℵ";s:4:"larr";s:3:"←";s:4:"uarr";s:3:"↑";s:4:"rarr";s:3:"→";s:4:"darr";s:3:"↓";s:4:"harr";s:3:"↔";s:5:"crarr";s:3:"↵";s:4:"lArr";s:3:"⇐";s:4:"uArr";s:3:"⇑";s:4:"rArr";s:3:"⇒";s:4:"dArr";s:3:"⇓";s:4:"hArr";s:3:"⇔";s:6:"forall";s:3:"∀";s:4:"part";s:3:"∂";s:5:"exist";s:3:"∃";s:5:"empty";s:3:"∅";s:5:"nabla";s:3:"∇";s:4:"isin";s:3:"∈";s:5:"notin";s:3:"∉";s:2:"ni";s:3:"∋";s:4:"prod";s:3:"∏";s:3:"sum";s:3:"∑";s:5:"minus";s:3:"−";s:6:"lowast";s:3:"∗";s:5:"radic";s:3:"√";s:4:"prop";s:3:"∝";s:5:"infin";s:3:"∞";s:3:"ang";s:3:"∠";s:3:"and";s:3:"∧";s:2:"or";s:3:"∨";s:3:"cap";s:3:"∩";s:3:"cup";s:3:"∪";s:3:"int";s:3:"∫";s:3:"sim";s:3:"∼";s:4:"cong";s:3:"≅";s:5:"asymp";s:3:"≈";s:2:"ne";s:3:"≠";s:5:"equiv";s:3:"≡";s:2:"le";s:3:"≤";s:2:"ge";s:3:"≥";s:3:"sub";s:3:"⊂";s:3:"sup";s:3:"⊃";s:4:"nsub";s:3:"⊄";s:4:"sube";s:3:"⊆";s:4:"supe";s:3:"⊇";s:5:"oplus";s:3:"⊕";s:6:"otimes";s:3:"⊗";s:4:"perp";s:3:"⊥";s:4:"sdot";s:3:"⋅";s:5:"lceil";s:3:"⌈";s:5:"rceil";s:3:"⌉";s:6:"lfloor";s:3:"⌊";s:6:"rfloor";s:3:"⌋";s:4:"lang";s:3:"〈";s:4:"rang";s:3:"〉";s:3:"loz";s:3:"◊";s:6:"spades";s:3:"♠";s:5:"clubs";s:3:"♣";s:6:"hearts";s:3:"♥";s:5:"diams";s:3:"♦";}
\ No newline at end of file
diff --git a/library/HTMLPurifier/Filter/ExtractStyleBlocks.php b/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
deleted file mode 100644
index bbf78a6630..0000000000
--- a/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
+++ /dev/null
@@ -1,135 +0,0 @@
-<?php
-
-/**
- * This filter extracts <style> blocks from input HTML, cleans them up
- * using CSSTidy, and then places them in $purifier->context->get('StyleBlocks')
- * so they can be used elsewhere in the document.
- *
- * @note
- *      See tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php for
- *      sample usage.
- *
- * @note
- *      This filter can also be used on stylesheets not included in the
- *      document--something purists would probably prefer. Just directly
- *      call HTMLPurifier_Filter_ExtractStyleBlocks->cleanCSS()
- */
-class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
-{
-
-    public $name = 'ExtractStyleBlocks';
-    private $_styleMatches = array();
-    private $_tidy;
-
-    public function __construct() {
-        $this->_tidy = new csstidy();
-    }
-
-    /**
-     * Save the contents of CSS blocks to style matches
-     * @param $matches preg_replace style $matches array
-     */
-    protected function styleCallback($matches) {
-        $this->_styleMatches[] = $matches[1];
-    }
-
-    /**
-     * Removes inline <style> tags from HTML, saves them for later use
-     * @todo Extend to indicate non-text/css style blocks
-     */
-    public function preFilter($html, $config, $context) {
-        $tidy = $config->get('Filter.ExtractStyleBlocks.TidyImpl');
-        if ($tidy !== null) $this->_tidy = $tidy;
-        $html = preg_replace_callback('#<style(?:\s.*)?>(.+)</style>#isU', array($this, 'styleCallback'), $html);
-        $style_blocks = $this->_styleMatches;
-        $this->_styleMatches = array(); // reset
-        $context->register('StyleBlocks', $style_blocks); // $context must not be reused
-        if ($this->_tidy) {
-            foreach ($style_blocks as &$style) {
-                $style = $this->cleanCSS($style, $config, $context);
-            }
-        }
-        return $html;
-    }
-
-    /**
-     * Takes CSS (the stuff found in <style>) and cleans it.
-     * @warning Requires CSSTidy <http://csstidy.sourceforge.net/>
-     * @param $css     CSS styling to clean
-     * @param $config  Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Cleaned CSS
-     */
-    public function cleanCSS($css, $config, $context) {
-        // prepare scope
-        $scope = $config->get('Filter.ExtractStyleBlocks.Scope');
-        if ($scope !== null) {
-            $scopes = array_map('trim', explode(',', $scope));
-        } else {
-            $scopes = array();
-        }
-        // remove comments from CSS
-        $css = trim($css);
-        if (strncmp('<!--', $css, 4) === 0) {
-            $css = substr($css, 4);
-        }
-        if (strlen($css) > 3 && substr($css, -3) == '-->') {
-            $css = substr($css, 0, -3);
-        }
-        $css = trim($css);
-        $this->_tidy->parse($css);
-        $css_definition = $config->getDefinition('CSS');
-        foreach ($this->_tidy->css as $k => $decls) {
-            // $decls are all CSS declarations inside an @ selector
-            $new_decls = array();
-            foreach ($decls as $selector => $style) {
-                $selector = trim($selector);
-                if ($selector === '') continue; // should not happen
-                if ($selector[0] === '+') {
-                    if ($selector !== '' && $selector[0] === '+') continue;
-                }
-                if (!empty($scopes)) {
-                    $new_selector = array(); // because multiple ones are possible
-                    $selectors = array_map('trim', explode(',', $selector));
-                    foreach ($scopes as $s1) {
-                        foreach ($selectors as $s2) {
-                            $new_selector[] = "$s1 $s2";
-                        }
-                    }
-                    $selector = implode(', ', $new_selector); // now it's a string
-                }
-                foreach ($style as $name => $value) {
-                    if (!isset($css_definition->info[$name])) {
-                        unset($style[$name]);
-                        continue;
-                    }
-                    $def = $css_definition->info[$name];
-                    $ret = $def->validate($value, $config, $context);
-                    if ($ret === false) unset($style[$name]);
-                    else $style[$name] = $ret;
-                }
-                $new_decls[$selector] = $style;
-            }
-            $this->_tidy->css[$k] = $new_decls;
-        }
-        // remove stuff that shouldn't be used, could be reenabled
-        // after security risks are analyzed
-        $this->_tidy->import = array();
-        $this->_tidy->charset = null;
-        $this->_tidy->namespace = null;
-        $css = $this->_tidy->print->plain();
-        // we are going to escape any special characters <>& to ensure
-        // that no funny business occurs (i.e. </style> in a font-family prop).
-        if ($config->get('Filter.ExtractStyleBlocks.Escaping')) {
-            $css = str_replace(
-                array('<',    '>',    '&'),
-                array('\3C ', '\3E ', '\26 '),
-                $css
-            );
-        }
-        return $css;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Filter/YouTube.php b/library/HTMLPurifier/Filter/YouTube.php
deleted file mode 100644
index 23df221eaa..0000000000
--- a/library/HTMLPurifier/Filter/YouTube.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
-{
-
-    public $name = 'YouTube';
-
-    public function preFilter($html, $config, $context) {
-        $pre_regex = '#<object[^>]+>.+?'.
-            'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s';
-        $pre_replace = '<span class="youtube-embed">\1</span>';
-        return preg_replace($pre_regex, $pre_replace, $html);
-    }
-
-    public function postFilter($html, $config, $context) {
-        $post_regex = '#<span class="youtube-embed">((?:v|cp)/[A-Za-z0-9\-_=]+)</span>#';
-        return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
-    }
-
-    protected function armorUrl($url) {
-        return str_replace('--', '-&#45;', $url);
-    }
-
-    protected function postFilterCallback($matches) {
-        $url = $this->armorUrl($matches[1]);
-        return '<object width="425" height="350" type="application/x-shockwave-flash" '.
-            'data="http://www.youtube.com/'.$url.'">'.
-            '<param name="movie" value="http://www.youtube.com/'.$url.'"></param>'.
-            '<!--[if IE]>'.
-            '<embed src="http://www.youtube.com/'.$url.'"'.
-            'type="application/x-shockwave-flash"'.
-            'wmode="transparent" width="425" height="350" />'.
-            '<![endif]-->'.
-            '</object>';
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Forms.php b/library/HTMLPurifier/HTMLModule/Forms.php
deleted file mode 100644
index 44c22f6f8b..0000000000
--- a/library/HTMLPurifier/HTMLModule/Forms.php
+++ /dev/null
@@ -1,118 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Forms module, defines all form-related elements found in HTML 4.
- */
-class HTMLPurifier_HTMLModule_Forms extends HTMLPurifier_HTMLModule
-{
-    public $name = 'Forms';
-    public $safe = false;
-
-    public $content_sets = array(
-        'Block' => 'Form',
-        'Inline' => 'Formctrl',
-    );
-
-    public function setup($config) {
-        $form = $this->addElement('form', 'Form',
-          'Required: Heading | List | Block | fieldset', 'Common', array(
-            'accept' => 'ContentTypes',
-            'accept-charset' => 'Charsets',
-            'action*' => 'URI',
-            'method' => 'Enum#get,post',
-            // really ContentType, but these two are the only ones used today
-            'enctype' => 'Enum#application/x-www-form-urlencoded,multipart/form-data',
-        ));
-        $form->excludes = array('form' => true);
-
-        $input = $this->addElement('input', 'Formctrl', 'Empty', 'Common', array(
-            'accept' => 'ContentTypes',
-            'accesskey' => 'Character',
-            'alt' => 'Text',
-            'checked' => 'Bool#checked',
-            'disabled' => 'Bool#disabled',
-            'maxlength' => 'Number',
-            'name' => 'CDATA',
-            'readonly' => 'Bool#readonly',
-            'size' => 'Number',
-            'src' => 'URI#embeds',
-            'tabindex' => 'Number',
-            'type' => 'Enum#text,password,checkbox,button,radio,submit,reset,file,hidden,image',
-            'value' => 'CDATA',
-        ));
-        $input->attr_transform_post[] = new HTMLPurifier_AttrTransform_Input();
-
-        $this->addElement('select', 'Formctrl', 'Required: optgroup | option', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'multiple' => 'Bool#multiple',
-            'name' => 'CDATA',
-            'size' => 'Number',
-            'tabindex' => 'Number',
-        ));
-
-        $this->addElement('option', false, 'Optional: #PCDATA', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'label' => 'Text',
-            'selected' => 'Bool#selected',
-            'value' => 'CDATA',
-        ));
-        // It's illegal for there to be more than one selected, but not
-        // be multiple. Also, no selected means undefined behavior. This might
-        // be difficult to implement; perhaps an injector, or a context variable.
-
-        $textarea = $this->addElement('textarea', 'Formctrl', 'Optional: #PCDATA', 'Common', array(
-            'accesskey' => 'Character',
-            'cols*' => 'Number',
-            'disabled' => 'Bool#disabled',
-            'name' => 'CDATA',
-            'readonly' => 'Bool#readonly',
-            'rows*' => 'Number',
-            'tabindex' => 'Number',
-        ));
-        $textarea->attr_transform_pre[] = new HTMLPurifier_AttrTransform_Textarea();
-
-        $button = $this->addElement('button', 'Formctrl', 'Optional: #PCDATA | Heading | List | Block | Inline', 'Common', array(
-            'accesskey' => 'Character',
-            'disabled' => 'Bool#disabled',
-            'name' => 'CDATA',
-            'tabindex' => 'Number',
-            'type' => 'Enum#button,submit,reset',
-            'value' => 'CDATA',
-        ));
-
-        // For exclusions, ideally we'd specify content sets, not literal elements
-        $button->excludes = $this->makeLookup(
-            'form', 'fieldset', // Form
-            'input', 'select', 'textarea', 'label', 'button', // Formctrl
-            'a' // as per HTML 4.01 spec, this is omitted by modularization
-        );
-
-        // Extra exclusion: img usemap="" is not permitted within this element.
-        // We'll omit this for now, since we don't have any good way of
-        // indicating it yet.
-
-        // This is HIGHLY user-unfriendly; we need a custom child-def for this
-        $this->addElement('fieldset', 'Form', 'Custom: (#WS?,legend,(Flow|#PCDATA)*)', 'Common');
-
-        $label = $this->addElement('label', 'Formctrl', 'Optional: #PCDATA | Inline', 'Common', array(
-            'accesskey' => 'Character',
-            // 'for' => 'IDREF', // IDREF not implemented, cannot allow
-        ));
-        $label->excludes = array('label' => true);
-
-        $this->addElement('legend', false, 'Optional: #PCDATA | Inline', 'Common', array(
-            'accesskey' => 'Character',
-        ));
-
-        $this->addElement('optgroup', false, 'Required: option', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'label*' => 'Text',
-        ));
-
-        // Don't forget an injector for <isindex>. This one's a little complex
-        // because it maps to multiple elements.
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/Strict.php b/library/HTMLPurifier/HTMLModule/Tidy/Strict.php
deleted file mode 100644
index c73dc3c4d1..0000000000
--- a/library/HTMLPurifier/HTMLModule/Tidy/Strict.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_Strict extends HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4
-{
-    public $name = 'Tidy_Strict';
-    public $defaultLevel = 'light';
-
-    public function makeFixes() {
-        $r = parent::makeFixes();
-        $r['blockquote#content_model_type'] = 'strictblockquote';
-        return $r;
-    }
-
-    public $defines_child_def = true;
-    public function getChildDef($def) {
-        if ($def->content_model_type != 'strictblockquote') return parent::getChildDef($def);
-        return new HTMLPurifier_ChildDef_StrictBlockquote($def->content_model);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector/RemoveEmpty.php b/library/HTMLPurifier/Injector/RemoveEmpty.php
deleted file mode 100644
index 638bfca03b..0000000000
--- a/library/HTMLPurifier/Injector/RemoveEmpty.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
-{
-
-    private $context, $config, $attrValidator, $removeNbsp, $removeNbspExceptions;
-
-    public function prepare($config, $context) {
-        parent::prepare($config, $context);
-        $this->config = $config;
-        $this->context = $context;
-        $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
-        $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
-        $this->attrValidator = new HTMLPurifier_AttrValidator();
-    }
-
-    public function handleElement(&$token) {
-        if (!$token instanceof HTMLPurifier_Token_Start) return;
-        $next = false;
-        for ($i = $this->inputIndex + 1, $c = count($this->inputTokens); $i < $c; $i++) {
-            $next = $this->inputTokens[$i];
-            if ($next instanceof HTMLPurifier_Token_Text) {
-                if ($next->is_whitespace) continue;
-                if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
-                    $plain = str_replace("\xC2\xA0", "", $next->data);
-                    $isWsOrNbsp = $plain === '' || ctype_space($plain);
-                    if ($isWsOrNbsp) continue;
-                }
-            }
-            break;
-        }
-        if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
-            if ($token->name == 'colgroup') return;
-            $this->attrValidator->validateToken($token, $this->config, $this->context);
-            $token->armor['ValidateAttributes'] = true;
-            if (isset($token->attr['id']) || isset($token->attr['name'])) return;
-            $token = $i - $this->inputIndex + 1;
-            for ($b = $this->inputIndex - 1; $b > 0; $b--) {
-                $prev = $this->inputTokens[$b];
-                if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) continue;
-                break;
-            }
-            // This is safe because we removed the token that triggered this.
-            $this->rewind($b - 1);
-            return;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Language/messages/en.php b/library/HTMLPurifier/Language/messages/en.php
deleted file mode 100644
index 8d7b5736bb..0000000000
--- a/library/HTMLPurifier/Language/messages/en.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-
-$fallback = false;
-
-$messages = array(
-
-'HTMLPurifier' => 'HTML Purifier',
-
-// for unit testing purposes
-'LanguageFactoryTest: Pizza' => 'Pizza',
-'LanguageTest: List' => '$1',
-'LanguageTest: Hash' => '$1.Keys; $1.Values',
-
-'Item separator' => ', ',
-'Item separator last' => ' and ', // non-Harvard style
-
-'ErrorCollector: No errors' => 'No errors detected. However, because error reporting is still incomplete, there may have been errors that the error collector was not notified of; please inspect the output HTML carefully.',
-'ErrorCollector: At line'   => ' at line $line',
-'ErrorCollector: Incidental errors'  => 'Incidental errors',
-
-'Lexer: Unclosed comment'      => 'Unclosed comment',
-'Lexer: Unescaped lt'          => 'Unescaped less-than sign (<) should be &lt;',
-'Lexer: Missing gt'            => 'Missing greater-than sign (>), previous less-than sign (<) should be escaped',
-'Lexer: Missing attribute key' => 'Attribute declaration has no key',
-'Lexer: Missing end quote'     => 'Attribute declaration has no end quote',
-'Lexer: Extracted body'        => 'Removed document metadata tags',
-
-'Strategy_RemoveForeignElements: Tag transform'              => '<$1> element transformed into $CurrentToken.Serialized',
-'Strategy_RemoveForeignElements: Missing required attribute' => '$CurrentToken.Compact element missing required attribute $1',
-'Strategy_RemoveForeignElements: Foreign element to text'    => 'Unrecognized $CurrentToken.Serialized tag converted to text',
-'Strategy_RemoveForeignElements: Foreign element removed'    => 'Unrecognized $CurrentToken.Serialized tag removed',
-'Strategy_RemoveForeignElements: Comment removed'            => 'Comment containing "$CurrentToken.Data" removed',
-'Strategy_RemoveForeignElements: Foreign meta element removed' => 'Unrecognized $CurrentToken.Serialized meta tag and all descendants removed',
-'Strategy_RemoveForeignElements: Token removed to end'       => 'Tags and text starting from $1 element where removed to end',
-'Strategy_RemoveForeignElements: Trailing hyphen in comment removed' => 'Trailing hyphen(s) in comment removed',
-'Strategy_RemoveForeignElements: Hyphens in comment collapsed' => 'Double hyphens in comments are not allowed, and were collapsed into single hyphens',
-
-'Strategy_MakeWellFormed: Unnecessary end tag removed' => 'Unnecessary $CurrentToken.Serialized tag removed',
-'Strategy_MakeWellFormed: Unnecessary end tag to text' => 'Unnecessary $CurrentToken.Serialized tag converted to text',
-'Strategy_MakeWellFormed: Tag auto closed'             => '$1.Compact started on line $1.Line auto-closed by $CurrentToken.Compact',
-'Strategy_MakeWellFormed: Tag carryover'               => '$1.Compact started on line $1.Line auto-continued into $CurrentToken.Compact',
-'Strategy_MakeWellFormed: Stray end tag removed'       => 'Stray $CurrentToken.Serialized tag removed',
-'Strategy_MakeWellFormed: Stray end tag to text'       => 'Stray $CurrentToken.Serialized tag converted to text',
-'Strategy_MakeWellFormed: Tag closed by element end'   => '$1.Compact tag started on line $1.Line closed by end of $CurrentToken.Serialized',
-'Strategy_MakeWellFormed: Tag closed by document end'  => '$1.Compact tag started on line $1.Line closed by end of document',
-
-'Strategy_FixNesting: Node removed'          => '$CurrentToken.Compact node removed',
-'Strategy_FixNesting: Node excluded'         => '$CurrentToken.Compact node removed due to descendant exclusion by ancestor element',
-'Strategy_FixNesting: Node reorganized'      => 'Contents of $CurrentToken.Compact node reorganized to enforce its content model',
-'Strategy_FixNesting: Node contents removed' => 'Contents of $CurrentToken.Compact node removed',
-
-'AttrValidator: Attributes transformed' => 'Attributes on $CurrentToken.Compact transformed from $1.Keys to $2.Keys',
-'AttrValidator: Attribute removed' => '$CurrentAttr.Name attribute on $CurrentToken.Compact removed',
-
-);
-
-$errorNames = array(
-    E_ERROR   => 'Error',
-    E_WARNING => 'Warning',
-    E_NOTICE  => 'Notice'
-);
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Lexer/PEARSax3.php b/library/HTMLPurifier/Lexer/PEARSax3.php
deleted file mode 100644
index 1d358c7b6b..0000000000
--- a/library/HTMLPurifier/Lexer/PEARSax3.php
+++ /dev/null
@@ -1,139 +0,0 @@
-<?php
-
-/**
- * Proof-of-concept lexer that uses the PEAR package XML_HTMLSax3 to parse HTML.
- *
- * PEAR, not suprisingly, also has a SAX parser for HTML.  I don't know
- * very much about implementation, but it's fairly well written.  However, that
- * abstraction comes at a price: performance. You need to have it installed,
- * and if the API changes, it might break our adapter. Not sure whether or not
- * it's UTF-8 aware, but it has some entity parsing trouble (in all areas,
- * text and attributes).
- *
- * Quite personally, I don't recommend using the PEAR class, and the defaults
- * don't use it. The unit tests do perform the tests on the SAX parser too, but
- * whatever it does for poorly formed HTML is up to it.
- *
- * @todo Generalize so that XML_HTMLSax is also supported.
- *
- * @warning Entity-resolution inside attributes is broken.
- */
-
-class HTMLPurifier_Lexer_PEARSax3 extends HTMLPurifier_Lexer
-{
-
-    /**
-     * Internal accumulator array for SAX parsers.
-     */
-    protected $tokens = array();
-    protected $last_token_was_empty;
-
-    private $parent_handler;
-    private $stack = array();
-
-    public function tokenizeHTML($string, $config, $context) {
-
-        $this->tokens = array();
-        $this->last_token_was_empty = false;
-
-        $string = $this->normalize($string, $config, $context);
-
-        $this->parent_handler = set_error_handler(array($this, 'muteStrictErrorHandler'));
-
-        $parser = new XML_HTMLSax3();
-        $parser->set_object($this);
-        $parser->set_element_handler('openHandler','closeHandler');
-        $parser->set_data_handler('dataHandler');
-        $parser->set_escape_handler('escapeHandler');
-
-        // doesn't seem to work correctly for attributes
-        $parser->set_option('XML_OPTION_ENTITIES_PARSED', 1);
-
-        $parser->parse($string);
-
-        restore_error_handler();
-
-        return $this->tokens;
-
-    }
-
-    /**
-     * Open tag event handler, interface is defined by PEAR package.
-     */
-    public function openHandler(&$parser, $name, $attrs, $closed) {
-        // entities are not resolved in attrs
-        foreach ($attrs as $key => $attr) {
-            $attrs[$key] = $this->parseData($attr);
-        }
-        if ($closed) {
-            $this->tokens[] = new HTMLPurifier_Token_Empty($name, $attrs);
-            $this->last_token_was_empty = true;
-        } else {
-            $this->tokens[] = new HTMLPurifier_Token_Start($name, $attrs);
-        }
-        $this->stack[] = $name;
-        return true;
-    }
-
-    /**
-     * Close tag event handler, interface is defined by PEAR package.
-     */
-    public function closeHandler(&$parser, $name) {
-        // HTMLSax3 seems to always send empty tags an extra close tag
-        // check and ignore if you see it:
-        // [TESTME] to make sure it doesn't overreach
-        if ($this->last_token_was_empty) {
-            $this->last_token_was_empty = false;
-            return true;
-        }
-        $this->tokens[] = new HTMLPurifier_Token_End($name);
-        if (!empty($this->stack)) array_pop($this->stack);
-        return true;
-    }
-
-    /**
-     * Data event handler, interface is defined by PEAR package.
-     */
-    public function dataHandler(&$parser, $data) {
-        $this->last_token_was_empty = false;
-        $this->tokens[] = new HTMLPurifier_Token_Text($data);
-        return true;
-    }
-
-    /**
-     * Escaped text handler, interface is defined by PEAR package.
-     */
-    public function escapeHandler(&$parser, $data) {
-        if (strpos($data, '--') === 0) {
-            // remove trailing and leading double-dashes
-            $data = substr($data, 2);
-            if (strlen($data) >= 2 && substr($data, -2) == "--") {
-                $data = substr($data, 0, -2);
-            }
-            if (isset($this->stack[sizeof($this->stack) - 1]) &&
-                $this->stack[sizeof($this->stack) - 1] == "style") {
-                $this->tokens[] = new HTMLPurifier_Token_Text($data);
-            } else {
-                $this->tokens[] = new HTMLPurifier_Token_Comment($data);
-            }
-            $this->last_token_was_empty = false;
-        }
-        // CDATA is handled elsewhere, but if it was handled here:
-        //if (strpos($data, '[CDATA[') === 0) {
-        //    $this->tokens[] = new HTMLPurifier_Token_Text(
-        //        substr($data, 7, strlen($data) - 9) );
-        //}
-        return true;
-    }
-
-    /**
-     * An error handler that mutes strict errors
-     */
-    public function muteStrictErrorHandler($errno, $errstr, $errfile=null, $errline=null, $errcontext=null) {
-        if ($errno == E_STRICT) return;
-        return call_user_func($this->parent_handler, $errno, $errstr, $errfile, $errline, $errcontext);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Lexer/PH5P.php b/library/HTMLPurifier/Lexer/PH5P.php
deleted file mode 100644
index fa1bf973e0..0000000000
--- a/library/HTMLPurifier/Lexer/PH5P.php
+++ /dev/null
@@ -1,3906 +0,0 @@
-<?php
-
-/**
- * Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.
- * Occupies space in the HTML5 pseudo-namespace, which may cause conflicts.
- * 
- * @note
- *    Recent changes to PHP's DOM extension have resulted in some fatal
- *    error conditions with the original version of PH5P. Pending changes,
- *    this lexer will punt to DirectLex if DOM throughs an exception.
- */
-
-class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex {
-    
-    public function tokenizeHTML($html, $config, $context) {
-        $new_html = $this->normalize($html, $config, $context);
-        $new_html = $this->wrapHTML($new_html, $config, $context);
-        try {
-            $parser = new HTML5($new_html);
-            $doc = $parser->save();
-        } catch (DOMException $e) {
-            // Uh oh, it failed. Punt to DirectLex.
-            $lexer = new HTMLPurifier_Lexer_DirectLex();
-            $context->register('PH5PError', $e); // save the error, so we can detect it
-            return $lexer->tokenizeHTML($html, $config, $context); // use original HTML
-        }
-        $tokens = array();
-        $this->tokenizeDOM(
-            $doc->getElementsByTagName('html')->item(0)-> // <html>
-                  getElementsByTagName('body')->item(0)-> //   <body>
-                  getElementsByTagName('div')->item(0)    //     <div>
-            , $tokens);
-        return $tokens;
-    }
-    
-}
-
-/*
-
-Copyright 2007 Jeroen van der Meer <http://jero.net/> 
-
-Permission is hereby granted, free of charge, to any person obtaining a 
-copy of this software and associated documentation files (the 
-"Software"), to deal in the Software without restriction, including 
-without limitation the rights to use, copy, modify, merge, publish, 
-distribute, sublicense, and/or sell copies of the Software, and to 
-permit persons to whom the Software is furnished to do so, subject to 
-the following conditions: 
-
-The above copyright notice and this permission notice shall be included 
-in all copies or substantial portions of the Software. 
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
-IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
-TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
-SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
-
-*/
-
-class HTML5 {
-    private $data;
-    private $char;
-    private $EOF;
-    private $state;
-    private $tree;
-    private $token;
-    private $content_model;
-    private $escape = false;
-    private $entities = array('AElig;','AElig','AMP;','AMP','Aacute;','Aacute',
-    'Acirc;','Acirc','Agrave;','Agrave','Alpha;','Aring;','Aring','Atilde;',
-    'Atilde','Auml;','Auml','Beta;','COPY;','COPY','Ccedil;','Ccedil','Chi;',
-    'Dagger;','Delta;','ETH;','ETH','Eacute;','Eacute','Ecirc;','Ecirc','Egrave;',
-    'Egrave','Epsilon;','Eta;','Euml;','Euml','GT;','GT','Gamma;','Iacute;',
-    'Iacute','Icirc;','Icirc','Igrave;','Igrave','Iota;','Iuml;','Iuml','Kappa;',
-    'LT;','LT','Lambda;','Mu;','Ntilde;','Ntilde','Nu;','OElig;','Oacute;',
-    'Oacute','Ocirc;','Ocirc','Ograve;','Ograve','Omega;','Omicron;','Oslash;',
-    'Oslash','Otilde;','Otilde','Ouml;','Ouml','Phi;','Pi;','Prime;','Psi;',
-    'QUOT;','QUOT','REG;','REG','Rho;','Scaron;','Sigma;','THORN;','THORN',
-    'TRADE;','Tau;','Theta;','Uacute;','Uacute','Ucirc;','Ucirc','Ugrave;',
-    'Ugrave','Upsilon;','Uuml;','Uuml','Xi;','Yacute;','Yacute','Yuml;','Zeta;',
-    'aacute;','aacute','acirc;','acirc','acute;','acute','aelig;','aelig',
-    'agrave;','agrave','alefsym;','alpha;','amp;','amp','and;','ang;','apos;',
-    'aring;','aring','asymp;','atilde;','atilde','auml;','auml','bdquo;','beta;',
-    'brvbar;','brvbar','bull;','cap;','ccedil;','ccedil','cedil;','cedil',
-    'cent;','cent','chi;','circ;','clubs;','cong;','copy;','copy','crarr;',
-    'cup;','curren;','curren','dArr;','dagger;','darr;','deg;','deg','delta;',
-    'diams;','divide;','divide','eacute;','eacute','ecirc;','ecirc','egrave;',
-    'egrave','empty;','emsp;','ensp;','epsilon;','equiv;','eta;','eth;','eth',
-    'euml;','euml','euro;','exist;','fnof;','forall;','frac12;','frac12',
-    'frac14;','frac14','frac34;','frac34','frasl;','gamma;','ge;','gt;','gt',
-    'hArr;','harr;','hearts;','hellip;','iacute;','iacute','icirc;','icirc',
-    'iexcl;','iexcl','igrave;','igrave','image;','infin;','int;','iota;',
-    'iquest;','iquest','isin;','iuml;','iuml','kappa;','lArr;','lambda;','lang;',
-    'laquo;','laquo','larr;','lceil;','ldquo;','le;','lfloor;','lowast;','loz;',
-    'lrm;','lsaquo;','lsquo;','lt;','lt','macr;','macr','mdash;','micro;','micro',
-    'middot;','middot','minus;','mu;','nabla;','nbsp;','nbsp','ndash;','ne;',
-    'ni;','not;','not','notin;','nsub;','ntilde;','ntilde','nu;','oacute;',
-    'oacute','ocirc;','ocirc','oelig;','ograve;','ograve','oline;','omega;',
-    'omicron;','oplus;','or;','ordf;','ordf','ordm;','ordm','oslash;','oslash',
-    'otilde;','otilde','otimes;','ouml;','ouml','para;','para','part;','permil;',
-    'perp;','phi;','pi;','piv;','plusmn;','plusmn','pound;','pound','prime;',
-    'prod;','prop;','psi;','quot;','quot','rArr;','radic;','rang;','raquo;',
-    'raquo','rarr;','rceil;','rdquo;','real;','reg;','reg','rfloor;','rho;',
-    'rlm;','rsaquo;','rsquo;','sbquo;','scaron;','sdot;','sect;','sect','shy;',
-    'shy','sigma;','sigmaf;','sim;','spades;','sub;','sube;','sum;','sup1;',
-    'sup1','sup2;','sup2','sup3;','sup3','sup;','supe;','szlig;','szlig','tau;',
-    'there4;','theta;','thetasym;','thinsp;','thorn;','thorn','tilde;','times;',
-    'times','trade;','uArr;','uacute;','uacute','uarr;','ucirc;','ucirc',
-    'ugrave;','ugrave','uml;','uml','upsih;','upsilon;','uuml;','uuml','weierp;',
-    'xi;','yacute;','yacute','yen;','yen','yuml;','yuml','zeta;','zwj;','zwnj;');
-
-    const PCDATA    = 0;
-    const RCDATA    = 1;
-    const CDATA     = 2;
-    const PLAINTEXT = 3;
-
-    const DOCTYPE  = 0;
-    const STARTTAG = 1;
-    const ENDTAG   = 2;
-    const COMMENT  = 3;
-    const CHARACTR = 4;
-    const EOF      = 5;
-
-    public function __construct($data) {
-        $data = str_replace("\r\n", "\n", $data);
-        $data = str_replace("\r", null, $data);
-
-        $this->data = $data;
-        $this->char = -1;
-        $this->EOF  = strlen($data);
-        $this->tree = new HTML5TreeConstructer;
-        $this->content_model = self::PCDATA;
-
-        $this->state = 'data';
-
-        while($this->state !== null) {
-            $this->{$this->state.'State'}();
-        }
-    }
-
-    public function save() {
-        return $this->tree->save();
-    }
-
-    private function char() {
-        return ($this->char < $this->EOF)
-            ? $this->data[$this->char]
-            : false;
-    }
-
-    private function character($s, $l = 0) {
-        if($s + $l < $this->EOF) {
-            if($l === 0) {
-                return $this->data[$s];
-            } else {
-                return substr($this->data, $s, $l);
-            }
-        }
-    }
-
-    private function characters($char_class, $start) {
-        return preg_replace('#^(['.$char_class.']+).*#s', '\\1', substr($this->data, $start));
-    }
-
-    private function dataState() {
-        // Consume the next input character
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
-            /* U+0026 AMPERSAND (&)
-            When the content model flag is set to one of the PCDATA or RCDATA
-            states: switch to the entity data state. Otherwise: treat it as per
-            the "anything else"    entry below. */
-            $this->state = 'entityData';
-
-        } elseif($char === '-') {
-            /* If the content model flag is set to either the RCDATA state or
-            the CDATA state, and the escape flag is false, and there are at
-            least three characters before this one in the input stream, and the
-            last four characters in the input stream, including this one, are
-            U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
-            and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
-            if(($this->content_model === self::RCDATA || $this->content_model ===
-            self::CDATA) && $this->escape === false &&
-            $this->char >= 3 && $this->character($this->char - 4, 4) === '<!--') {
-                $this->escape = true;
-            }
-
-            /* In any case, emit the input character as a character token. Stay
-            in the data state. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-        /* U+003C LESS-THAN SIGN (<) */
-        } elseif($char === '<' && ($this->content_model === self::PCDATA ||
-        (($this->content_model === self::RCDATA ||
-        $this->content_model === self::CDATA) && $this->escape === false))) {
-            /* When the content model flag is set to the PCDATA state: switch
-            to the tag open state.
-
-            When the content model flag is set to either the RCDATA state or
-            the CDATA state and the escape flag is false: switch to the tag
-            open state.
-
-            Otherwise: treat it as per the "anything else" entry below. */
-            $this->state = 'tagOpen';
-
-        /* U+003E GREATER-THAN SIGN (>) */
-        } elseif($char === '>') {
-            /* If the content model flag is set to either the RCDATA state or
-            the CDATA state, and the escape flag is true, and the last three
-            characters in the input stream including this one are U+002D
-            HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
-            set the escape flag to false. */
-            if(($this->content_model === self::RCDATA ||
-            $this->content_model === self::CDATA) && $this->escape === true &&
-            $this->character($this->char, 3) === '-->') {
-                $this->escape = false;
-            }
-
-            /* In any case, emit the input character as a character token.
-            Stay in the data state. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Emit an end-of-file token. */
-            $this->EOF();
-
-        } elseif($this->content_model === self::PLAINTEXT) {
-            /* When the content model flag is set to the PLAINTEXT state
-            THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of
-            the text and emit it as a character token. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => substr($this->data, $this->char)
-            ));
-
-            $this->EOF();
-
-        } else {
-            /* Anything else
-            THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that
-            otherwise would also be treated as a character token and emit it
-            as a single character token. Stay in the data state. */
-            $len  = strcspn($this->data, '<&', $this->char);
-            $char = substr($this->data, $this->char, $len);
-            $this->char += $len - 1;
-
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-            $this->state = 'data';
-        }
-    }
-
-    private function entityDataState() {
-        // Attempt to consume an entity.
-        $entity = $this->entity();
-
-        // If nothing is returned, emit a U+0026 AMPERSAND character token.
-        // Otherwise, emit the character token that was returned.
-        $char = (!$entity) ? '&' : $entity;
-        $this->emitToken(array(
-            'type' => self::CHARACTR,
-            'data' => $char
-        ));
-
-        // Finally, switch to the data state.
-        $this->state = 'data';
-    }
-
-    private function tagOpenState() {
-        switch($this->content_model) {
-            case self::RCDATA:
-            case self::CDATA:
-                /* If the next input character is a U+002F SOLIDUS (/) character,
-                consume it and switch to the close tag open state. If the next
-                input character is not a U+002F SOLIDUS (/) character, emit a
-                U+003C LESS-THAN SIGN character token and switch to the data
-                state to process the next input character. */
-                if($this->character($this->char + 1) === '/') {
-                    $this->char++;
-                    $this->state = 'closeTagOpen';
-
-                } else {
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<'
-                    ));
-
-                    $this->state = 'data';
-                }
-            break;
-
-            case self::PCDATA:
-                // If the content model flag is set to the PCDATA state
-                // Consume the next input character:
-                $this->char++;
-                $char = $this->char();
-
-                if($char === '!') {
-                    /* U+0021 EXCLAMATION MARK (!)
-                    Switch to the markup declaration open state. */
-                    $this->state = 'markupDeclarationOpen';
-
-                } elseif($char === '/') {
-                    /* U+002F SOLIDUS (/)
-                    Switch to the close tag open state. */
-                    $this->state = 'closeTagOpen';
-
-                } elseif(preg_match('/^[A-Za-z]$/', $char)) {
-                    /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
-                    Create a new start tag token, set its tag name to the lowercase
-                    version of the input character (add 0x0020 to the character's code
-                    point), then switch to the tag name state. (Don't emit the token
-                    yet; further details will be filled in before it is emitted.) */
-                    $this->token = array(
-                        'name'  => strtolower($char),
-                        'type'  => self::STARTTAG,
-                        'attr'  => array()
-                    );
-
-                    $this->state = 'tagName';
-
-                } elseif($char === '>') {
-                    /* U+003E GREATER-THAN SIGN (>)
-                    Parse error. Emit a U+003C LESS-THAN SIGN character token and a
-                    U+003E GREATER-THAN SIGN character token. Switch to the data state. */
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<>'
-                    ));
-
-                    $this->state = 'data';
-
-                } elseif($char === '?') {
-                    /* U+003F QUESTION MARK (?)
-                    Parse error. Switch to the bogus comment state. */
-                    $this->state = 'bogusComment';
-
-                } else {
-                    /* Anything else
-                    Parse error. Emit a U+003C LESS-THAN SIGN character token and
-                    reconsume the current input character in the data state. */
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<'
-                    ));
-
-                    $this->char--;
-                    $this->state = 'data';
-                }
-            break;
-        }
-    }
-
-    private function closeTagOpenState() {
-        $next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
-        $the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;
-
-        if(($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
-        (!$the_same || ($the_same && (!preg_match('/[\t\n\x0b\x0c >\/]/',
-        $this->character($this->char + 1 + strlen($next_node))) || $this->EOF === $this->char)))) {
-            /* If the content model flag is set to the RCDATA or CDATA states then
-            examine the next few characters. If they do not match the tag name of
-            the last start tag token emitted (case insensitively), or if they do but
-            they are not immediately followed by one of the following characters:
-                * U+0009 CHARACTER TABULATION
-                * U+000A LINE FEED (LF)
-                * U+000B LINE TABULATION
-                * U+000C FORM FEED (FF)
-                * U+0020 SPACE
-                * U+003E GREATER-THAN SIGN (>)
-                * U+002F SOLIDUS (/)
-                * EOF
-            ...then there is a parse error. Emit a U+003C LESS-THAN SIGN character
-            token, a U+002F SOLIDUS character token, and switch to the data state
-            to process the next input character. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => '</'
-            ));
-
-            $this->state = 'data';
-
-        } else {
-            /* Otherwise, if the content model flag is set to the PCDATA state,
-            or if the next few characters do match that tag name, consume the
-            next input character: */
-            $this->char++;
-            $char = $this->char();
-
-            if(preg_match('/^[A-Za-z]$/', $char)) {
-                /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
-                Create a new end tag token, set its tag name to the lowercase version
-                of the input character (add 0x0020 to the character's code point), then
-                switch to the tag name state. (Don't emit the token yet; further details
-                will be filled in before it is emitted.) */
-                $this->token = array(
-                    'name'  => strtolower($char),
-                    'type'  => self::ENDTAG
-                );
-
-                $this->state = 'tagName';
-
-            } elseif($char === '>') {
-                /* U+003E GREATER-THAN SIGN (>)
-                Parse error. Switch to the data state. */
-                $this->state = 'data';
-
-            } elseif($this->char === $this->EOF) {
-                /* EOF
-                Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F
-                SOLIDUS character token. Reconsume the EOF character in the data state. */
-                $this->emitToken(array(
-                    'type' => self::CHARACTR,
-                    'data' => '</'
-                ));
-
-                $this->char--;
-                $this->state = 'data';
-
-            } else {
-                /* Parse error. Switch to the bogus comment state. */
-                $this->state = 'bogusComment';
-            }
-        }
-    }
-
-    private function tagNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } elseif($char === '/') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current tag token's tag name.
-            Stay in the tag name state. */
-            $this->token['name'] .= strtolower($char);
-            $this->state = 'tagName';
-        }
-    }
-
-    private function beforeAttributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Stay in the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Start a new attribute in the current tag token. Set that attribute's
-            name to the current input character, and its value to the empty string.
-            Switch to the attribute name state. */
-            $this->token['attr'][] = array(
-                'name'  => strtolower($char),
-                'value' => null
-            );
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function attributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute name state. */
-            $this->state = 'afterAttributeName';
-
-        } elseif($char === '=') {
-            /* U+003D EQUALS SIGN (=)
-            Switch to the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/' && $this->character($this->char + 1) !== '>') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's name.
-            Stay in the attribute name state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['name'] .= strtolower($char);
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function afterAttributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the after attribute name state. */
-            $this->state = 'afterAttributeName';
-
-        } elseif($char === '=') {
-            /* U+003D EQUALS SIGN (=)
-            Switch to the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/' && $this->character($this->char + 1) !== '>') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the
-            before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Start a new attribute in the current tag token. Set that attribute's
-            name to the current input character, and its value to the empty string.
-            Switch to the attribute name state. */
-            $this->token['attr'][] = array(
-                'name'  => strtolower($char),
-                'value' => null
-            );
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function beforeAttributeValueState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '"') {
-            /* U+0022 QUOTATION MARK (")
-            Switch to the attribute value (double-quoted) state. */
-            $this->state = 'attributeValueDoubleQuoted';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the attribute value (unquoted) state and reconsume
-            this input character. */
-            $this->char--;
-            $this->state = 'attributeValueUnquoted';
-
-        } elseif($char === '\'') {
-            /* U+0027 APOSTROPHE (')
-            Switch to the attribute value (single-quoted) state. */
-            $this->state = 'attributeValueSingleQuoted';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Switch to the attribute value (unquoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueUnquoted';
-        }
-    }
-
-    private function attributeValueDoubleQuotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if($char === '"') {
-            /* U+0022 QUOTATION MARK (")
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState('double');
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the character
-            in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (double-quoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueDoubleQuoted';
-        }
-    }
-
-    private function attributeValueSingleQuotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if($char === '\'') {
-            /* U+0022 QUOTATION MARK (')
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState('single');
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the character
-            in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (single-quoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueSingleQuoted';
-        }
-    }
-
-    private function attributeValueUnquotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState();
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (unquoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueUnquoted';
-        }
-    }
-
-    private function entityInAttributeValueState() {
-        // Attempt to consume an entity.
-        $entity = $this->entity();
-
-        // If nothing is returned, append a U+0026 AMPERSAND character to the
-        // current attribute's value. Otherwise, emit the character token that
-        // was returned.
-        $char = (!$entity)
-            ? '&'
-            : $entity;
-
-        $last = count($this->token['attr']) - 1;
-        $this->token['attr'][$last]['value'] .= $char;
-    }
-
-    private function bogusCommentState() {
-        /* Consume every character up to the first U+003E GREATER-THAN SIGN
-        character (>) or the end of the file (EOF), whichever comes first. Emit
-        a comment token whose data is the concatenation of all the characters
-        starting from and including the character that caused the state machine
-        to switch into the bogus comment state, up to and including the last
-        consumed character before the U+003E character, if any, or up to the
-        end of the file otherwise. (If the comment was started by the end of
-        the file (EOF), the token is empty.) */
-        $data = $this->characters('^>', $this->char);
-        $this->emitToken(array(
-            'data' => $data,
-            'type' => self::COMMENT
-        ));
-
-        $this->char += strlen($data);
-
-        /* Switch to the data state. */
-        $this->state = 'data';
-
-        /* If the end of the file was reached, reconsume the EOF character. */
-        if($this->char === $this->EOF) {
-            $this->char = $this->EOF - 1;
-        }
-    }
-
-    private function markupDeclarationOpenState() {
-        /* If the next two characters are both U+002D HYPHEN-MINUS (-)
-        characters, consume those two characters, create a comment token whose
-        data is the empty string, and switch to the comment state. */
-        if($this->character($this->char + 1, 2) === '--') {
-            $this->char += 2;
-            $this->state = 'comment';
-            $this->token = array(
-                'data' => null,
-                'type' => self::COMMENT
-            );
-
-        /* Otherwise if the next seven chacacters are a case-insensitive match
-        for the word "DOCTYPE", then consume those characters and switch to the
-        DOCTYPE state. */
-        } elseif(strtolower($this->character($this->char + 1, 7)) === 'doctype') {
-            $this->char += 7;
-            $this->state = 'doctype';
-
-        /* Otherwise, is is a parse error. Switch to the bogus comment state.
-        The next character that is consumed, if any, is the first character
-        that will be in the comment. */
-        } else {
-            $this->char++;
-            $this->state = 'bogusComment';
-        }
-    }
-
-    private function commentState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        /* U+002D HYPHEN-MINUS (-) */
-        if($char === '-') {
-            /* Switch to the comment dash state  */
-            $this->state = 'commentDash';
-
-        /* EOF */
-        } elseif($this->char === $this->EOF) {
-            /* Parse error. Emit the comment token. Reconsume the EOF character
-            in the data state. */
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        /* Anything else */
-        } else {
-            /* Append the input character to the comment token's data. Stay in
-            the comment state. */
-            $this->token['data'] .= $char;
-        }
-    }
-
-    private function commentDashState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        /* U+002D HYPHEN-MINUS (-) */
-        if($char === '-') {
-            /* Switch to the comment end state  */
-            $this->state = 'commentEnd';
-
-        /* EOF */
-        } elseif($this->char === $this->EOF) {
-            /* Parse error. Emit the comment token. Reconsume the EOF character
-            in the data state. */
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        /* Anything else */
-        } else {
-            /* Append a U+002D HYPHEN-MINUS (-) character and the input
-            character to the comment token's data. Switch to the comment state. */
-            $this->token['data'] .= '-'.$char;
-            $this->state = 'comment';
-        }
-    }
-
-    private function commentEndState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '-') {
-            $this->token['data'] .= '-';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['data'] .= '--'.$char;
-            $this->state = 'comment';
-        }
-    }
-
-    private function doctypeState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            $this->state = 'beforeDoctypeName';
-
-        } else {
-            $this->char--;
-            $this->state = 'beforeDoctypeName';
-        }
-    }
-
-    private function beforeDoctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            // Stay in the before DOCTYPE name state.
-
-        } elseif(preg_match('/^[a-z]$/', $char)) {
-            $this->token = array(
-                'name' => strtoupper($char),
-                'type' => self::DOCTYPE,
-                'error' => true
-            );
-
-            $this->state = 'doctypeName';
-
-        } elseif($char === '>') {
-            $this->emitToken(array(
-                'name' => null,
-                'type' => self::DOCTYPE,
-                'error' => true
-            ));
-
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken(array(
-                'name' => null,
-                'type' => self::DOCTYPE,
-                'error' => true
-            ));
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token = array(
-                'name' => $char,
-                'type' => self::DOCTYPE,
-                'error' => true
-            );
-
-            $this->state = 'doctypeName';
-        }
-    }
-
-    private function doctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            $this->state = 'AfterDoctypeName';
-
-        } elseif($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif(preg_match('/^[a-z]$/', $char)) {
-            $this->token['name'] .= strtoupper($char);
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['name'] .= $char;
-        }
-
-        $this->token['error'] = ($this->token['name'] === 'HTML')
-            ? false
-            : true;
-    }
-
-    private function afterDoctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            // Stay in the DOCTYPE name state.
-
-        } elseif($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['error'] = true;
-            $this->state = 'bogusDoctype';
-        }
-    }
-
-    private function bogusDoctypeState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            // Stay in the bogus DOCTYPE state.
-        }
-    }
-
-    private function entity() {
-        $start = $this->char;
-
-        // This section defines how to consume an entity. This definition is
-        // used when parsing entities in text and in attributes.
-
-        // The behaviour depends on the identity of the next character (the
-        // one immediately after the U+0026 AMPERSAND character): 
-
-        switch($this->character($this->char + 1)) {
-            // U+0023 NUMBER SIGN (#)
-            case '#':
-
-                // The behaviour further depends on the character after the
-                // U+0023 NUMBER SIGN:
-                switch($this->character($this->char + 1)) {
-                    // U+0078 LATIN SMALL LETTER X
-                    // U+0058 LATIN CAPITAL LETTER X
-                    case 'x':
-                    case 'X':
-                        // Follow the steps below, but using the range of
-                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
-                        // NINE, U+0061 LATIN SMALL LETTER A through to U+0066
-                        // LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
-                        // A, through to U+0046 LATIN CAPITAL LETTER F (in other
-                        // words, 0-9, A-F, a-f).
-                        $char = 1;
-                        $char_class = '0-9A-Fa-f';
-                    break;
-
-                    // Anything else
-                    default:
-                        // Follow the steps below, but using the range of
-                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
-                        // NINE (i.e. just 0-9).
-                        $char = 0;
-                        $char_class = '0-9';
-                    break;
-                }
-
-                // Consume as many characters as match the range of characters
-                // given above.
-                $this->char++;
-                $e_name = $this->characters($char_class, $this->char + $char + 1);
-                $entity = $this->character($start, $this->char);
-                $cond = strlen($e_name) > 0;
-
-                // The rest of the parsing happens bellow.
-            break;
-
-            // Anything else
-            default:
-                // Consume the maximum number of characters possible, with the
-                // consumed characters case-sensitively matching one of the
-                // identifiers in the first column of the entities table.
-                $e_name = $this->characters('0-9A-Za-z;', $this->char + 1);
-                $len = strlen($e_name);
-
-                for($c = 1; $c <= $len; $c++) {
-                    $id = substr($e_name, 0, $c);
-                    $this->char++;
-
-                    if(in_array($id, $this->entities)) {
-                        if ($e_name[$c-1] !== ';') {
-                            if ($c < $len && $e_name[$c] == ';') {
-                                $this->char++; // consume extra semicolon
-                            }
-                        }
-                        $entity = $id;
-                        break;
-                    }
-                }
-
-                $cond = isset($entity);
-                // The rest of the parsing happens bellow.
-            break;
-        }
-
-        if(!$cond) {
-            // If no match can be made, then this is a parse error. No
-            // characters are consumed, and nothing is returned.
-            $this->char = $start;
-            return false;
-        }
-
-        // Return a character token for the character corresponding to the
-        // entity name (as given by the second column of the entities table).
-        return html_entity_decode('&'.$entity.';', ENT_QUOTES, 'UTF-8');
-    }
-
-    private function emitToken($token) {
-        $emit = $this->tree->emitToken($token);
-
-        if(is_int($emit)) {
-            $this->content_model = $emit;
-
-        } elseif($token['type'] === self::ENDTAG) {
-            $this->content_model = self::PCDATA;
-        }
-    }
-
-    private function EOF() {
-        $this->state = null;
-        $this->tree->emitToken(array(
-            'type' => self::EOF
-        ));
-    }
-}
-
-class HTML5TreeConstructer {
-    public $stack = array();
-
-    private $phase;
-    private $mode;
-    private $dom;
-    private $foster_parent = null;
-    private $a_formatting  = array();
-
-    private $head_pointer = null;
-    private $form_pointer = null;
-
-    private $scoping = array('button','caption','html','marquee','object','table','td','th');
-    private $formatting = array('a','b','big','em','font','i','nobr','s','small','strike','strong','tt','u');
-    private $special = array('address','area','base','basefont','bgsound',
-    'blockquote','body','br','center','col','colgroup','dd','dir','div','dl',
-    'dt','embed','fieldset','form','frame','frameset','h1','h2','h3','h4','h5',
-    'h6','head','hr','iframe','image','img','input','isindex','li','link',
-    'listing','menu','meta','noembed','noframes','noscript','ol','optgroup',
-    'option','p','param','plaintext','pre','script','select','spacer','style',
-    'tbody','textarea','tfoot','thead','title','tr','ul','wbr');
-
-    // The different phases.
-    const INIT_PHASE = 0;
-    const ROOT_PHASE = 1;
-    const MAIN_PHASE = 2;
-    const END_PHASE  = 3;
-
-    // The different insertion modes for the main phase.
-    const BEFOR_HEAD = 0;
-    const IN_HEAD    = 1;
-    const AFTER_HEAD = 2;
-    const IN_BODY    = 3;
-    const IN_TABLE   = 4;
-    const IN_CAPTION = 5;
-    const IN_CGROUP  = 6;
-    const IN_TBODY   = 7;
-    const IN_ROW     = 8;
-    const IN_CELL    = 9;
-    const IN_SELECT  = 10;
-    const AFTER_BODY = 11;
-    const IN_FRAME   = 12;
-    const AFTR_FRAME = 13;
-
-    // The different types of elements.
-    const SPECIAL    = 0;
-    const SCOPING    = 1;
-    const FORMATTING = 2;
-    const PHRASING   = 3;
-
-    const MARKER     = 0;
-
-    public function __construct() {
-        $this->phase = self::INIT_PHASE;
-        $this->mode = self::BEFOR_HEAD;
-        $this->dom = new DOMDocument;
-
-        $this->dom->encoding = 'UTF-8';
-        $this->dom->preserveWhiteSpace = true;
-        $this->dom->substituteEntities = true;
-        $this->dom->strictErrorChecking = false;
-    }
-
-    // Process tag tokens
-    public function emitToken($token) {
-        switch($this->phase) {
-            case self::INIT_PHASE: return $this->initPhase($token); break;
-            case self::ROOT_PHASE: return $this->rootElementPhase($token); break;
-            case self::MAIN_PHASE: return $this->mainPhase($token); break;
-            case self::END_PHASE : return $this->trailingEndPhase($token); break;
-        }
-    }
-
-    private function initPhase($token) {
-        /* Initially, the tree construction stage must handle each token
-        emitted from the tokenisation stage as follows: */
-
-        /* A DOCTYPE token that is marked as being in error
-        A comment token
-        A start tag token
-        An end tag token
-        A character token that is not one of one of U+0009 CHARACTER TABULATION,
-            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-            or U+0020 SPACE
-        An end-of-file token */
-        if((isset($token['error']) && $token['error']) ||
-        $token['type'] === HTML5::COMMENT ||
-        $token['type'] === HTML5::STARTTAG ||
-        $token['type'] === HTML5::ENDTAG ||
-        $token['type'] === HTML5::EOF ||
-        ($token['type'] === HTML5::CHARACTR && isset($token['data']) &&
-        !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data']))) {
-            /* This specification does not define how to handle this case. In
-            particular, user agents may ignore the entirety of this specification
-            altogether for such documents, and instead invoke special parse modes
-            with a greater emphasis on backwards compatibility. */
-
-            $this->phase = self::ROOT_PHASE;
-            return $this->rootElementPhase($token);
-
-        /* A DOCTYPE token marked as being correct */
-        } elseif(isset($token['error']) && !$token['error']) {
-            /* Append a DocumentType node to the Document  node, with the name
-            attribute set to the name given in the DOCTYPE token (which will be
-            "HTML"), and the other attributes specific to DocumentType objects
-            set to null, empty lists, or the empty string as appropriate. */
-            $doctype = new DOMDocumentType(null, null, 'HTML');
-
-            /* Then, switch to the root element phase of the tree construction
-            stage. */
-            $this->phase = self::ROOT_PHASE;
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif(isset($token['data']) && preg_match('/^[\t\n\x0b\x0c ]+$/',
-        $token['data'])) {
-            /* Append that character  to the Document node. */
-            $text = $this->dom->createTextNode($token['data']);
-            $this->dom->appendChild($text);
-        }
-    }
-
-    private function rootElementPhase($token) {
-        /* After the initial phase, as each token is emitted from the tokenisation
-        stage, it must be processed as described in this section. */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the Document object with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->dom->appendChild($comment);
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append that character  to the Document node. */
-            $text = $this->dom->createTextNode($token['data']);
-            $this->dom->appendChild($text);
-
-        /* A character token that is not one of U+0009 CHARACTER TABULATION,
-            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED
-            (FF), or U+0020 SPACE
-        A start tag token
-        An end tag token
-        An end-of-file token */
-        } elseif(($token['type'] === HTML5::CHARACTR &&
-        !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
-        $token['type'] === HTML5::STARTTAG ||
-        $token['type'] === HTML5::ENDTAG ||
-        $token['type'] === HTML5::EOF) {
-            /* Create an HTMLElement node with the tag name html, in the HTML
-            namespace. Append it to the Document object. Switch to the main
-            phase and reprocess the current token. */
-            $html = $this->dom->createElement('html');
-            $this->dom->appendChild($html);
-            $this->stack[] = $html;
-
-            $this->phase = self::MAIN_PHASE;
-            return $this->mainPhase($token);
-        }
-    }
-
-    private function mainPhase($token) {
-        /* Tokens in the main phase must be handled as follows: */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A start tag token with the tag name "html" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'html') {
-            /* If this start tag token was not the first start tag token, then
-            it is a parse error. */
-
-            /* For each attribute on the token, check to see if the attribute
-            is already present on the top element of the stack of open elements.
-            If it is not, add the attribute and its corresponding value to that
-            element. */
-            foreach($token['attr'] as $attr) {
-                if(!$this->stack[0]->hasAttribute($attr['name'])) {
-                    $this->stack[0]->setAttribute($attr['name'], $attr['value']);
-                }
-            }
-
-        /* An end-of-file token */
-        } elseif($token['type'] === HTML5::EOF) {
-            /* Generate implied end tags. */
-            $this->generateImpliedEndTags();
-
-        /* Anything else. */
-        } else {
-            /* Depends on the insertion mode: */
-            switch($this->mode) {
-                case self::BEFOR_HEAD: return $this->beforeHead($token); break;
-                case self::IN_HEAD:    return $this->inHead($token); break;
-                case self::AFTER_HEAD: return $this->afterHead($token); break;
-                case self::IN_BODY:    return $this->inBody($token); break;
-                case self::IN_TABLE:   return $this->inTable($token); break;
-                case self::IN_CAPTION: return $this->inCaption($token); break;
-                case self::IN_CGROUP:  return $this->inColumnGroup($token); break;
-                case self::IN_TBODY:   return $this->inTableBody($token); break;
-                case self::IN_ROW:     return $this->inRow($token); break;
-                case self::IN_CELL:    return $this->inCell($token); break;
-                case self::IN_SELECT:  return $this->inSelect($token); break;
-                case self::AFTER_BODY: return $this->afterBody($token); break;
-                case self::IN_FRAME:   return $this->inFrameset($token); break;
-                case self::AFTR_FRAME: return $this->afterFrameset($token); break;
-                case self::END_PHASE:  return $this->trailingEndPhase($token); break;
-            }
-        }
-    }
-
-    private function beforeHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token with the tag name "head" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') {
-            /* Create an element for the token, append the new element to the
-            current node and push it onto the stack of open elements. */
-            $element = $this->insertElement($token);
-
-            /* Set the head element pointer to this new element node. */
-            $this->head_pointer = $element;
-
-            /* Change the insertion mode to "in head". */
-            $this->mode = self::IN_HEAD;
-
-        /* A start tag token whose tag name is one of: "base", "link", "meta",
-        "script", "style", "title". Or an end tag with the tag name "html".
-        Or a character token that is not one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE. Or any other start tag token */
-        } elseif($token['type'] === HTML5::STARTTAG ||
-        ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') ||
-        ($token['type'] === HTML5::CHARACTR && !preg_match('/^[\t\n\x0b\x0c ]$/',
-        $token['data']))) {
-            /* Act as if a start tag token with the tag name "head" and no
-            attributes had been seen, then reprocess the current token. */
-            $this->beforeHead(array(
-                'name' => 'head',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inHead($token);
-
-        /* Any other end tag */
-        } elseif($token['type'] === HTML5::ENDTAG) {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function inHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE.
-
-        THIS DIFFERS FROM THE SPEC: If the current node is either a title, style
-        or script element, append the character to the current node regardless
-        of its content. */
-        if(($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) || (
-        $token['type'] === HTML5::CHARACTR && in_array(end($this->stack)->nodeName,
-        array('title', 'style', 'script')))) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('title', 'style', 'script'))) {
-            array_pop($this->stack);
-            return HTML5::PCDATA;
-
-        /* A start tag with the tag name "title" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'title') {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-
-            } else {
-                $element = $this->insertElement($token);
-            }
-
-            /* Switch the tokeniser's content model flag  to the RCDATA state. */
-            return HTML5::RCDATA;
-
-        /* A start tag with the tag name "style" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'style') {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-
-            } else {
-                $this->insertElement($token);
-            }
-
-            /* Switch the tokeniser's content model flag  to the CDATA state. */
-            return HTML5::CDATA;
-
-        /* A start tag with the tag name "script" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'script') {
-            /* Create an element for the token. */
-            $element = $this->insertElement($token, false);
-            $this->head_pointer->appendChild($element);
-
-            /* Switch the tokeniser's content model flag  to the CDATA state. */
-            return HTML5::CDATA;
-
-        /* A start tag with the tag name "base", "link", or "meta" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('base', 'link', 'meta'))) {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-                array_pop($this->stack);
-
-            } else {
-                $this->insertElement($token);
-            }
-
-        /* An end tag with the tag name "head" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'head') {
-            /* If the current node is a head element, pop the current node off
-            the stack of open elements. */
-            if($this->head_pointer->isSameNode(end($this->stack))) {
-                array_pop($this->stack);
-
-            /* Otherwise, this is a parse error. */
-            } else {
-                // k
-            }
-
-            /* Change the insertion mode to "after head". */
-            $this->mode = self::AFTER_HEAD;
-
-        /* A start tag with the tag name "head" or an end tag except "html". */
-        } elseif(($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') ||
-        ($token['type'] === HTML5::ENDTAG && $token['name'] !== 'html')) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* If the current node is a head element, act as if an end tag
-            token with the tag name "head" had been seen. */
-            if($this->head_pointer->isSameNode(end($this->stack))) {
-                $this->inHead(array(
-                    'name' => 'head',
-                    'type' => HTML5::ENDTAG
-                ));
-
-            /* Otherwise, change the insertion mode to "after head". */
-            } else {
-                $this->mode = self::AFTER_HEAD;
-            }
-
-            /* Then, reprocess the current token. */
-            return $this->afterHead($token);
-        }
-    }
-
-    private function afterHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token with the tag name "body" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'body') {
-            /* Insert a body element for the token. */
-            $this->insertElement($token);
-
-            /* Change the insertion mode to "in body". */
-            $this->mode = self::IN_BODY;
-
-        /* A start tag token with the tag name "frameset" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'frameset') {
-            /* Insert a frameset element for the token. */
-            $this->insertElement($token);
-
-            /* Change the insertion mode to "in frameset". */
-            $this->mode = self::IN_FRAME;
-
-        /* A start tag token whose tag name is one of: "base", "link", "meta",
-        "script", "style", "title" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('base', 'link', 'meta', 'script', 'style', 'title'))) {
-            /* Parse error. Switch the insertion mode back to "in head" and
-            reprocess the token. */
-            $this->mode = self::IN_HEAD;
-            return $this->inHead($token);
-
-        /* Anything else */
-        } else {
-            /* Act as if a start tag token with the tag name "body" and no
-            attributes had been seen, and then reprocess the current token. */
-            $this->afterHead(array(
-                'name' => 'body',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inBody($token);
-        }
-    }
-
-    private function inBody($token) {
-        /* Handle the token as follows: */
-
-        switch($token['type']) {
-            /* A character token */
-            case HTML5::CHARACTR:
-                /* Reconstruct the active formatting elements, if any. */
-                $this->reconstructActiveFormattingElements();
-
-                /* Append the token's character to the current node. */
-                $this->insertText($token['data']);
-            break;
-
-            /* A comment token */
-            case HTML5::COMMENT:
-                /* Append a Comment node to the current node with the data
-                attribute set to the data given in the comment token. */
-                $this->insertComment($token['data']);
-            break;
-
-            case HTML5::STARTTAG:
-            switch($token['name']) {
-                /* A start tag token whose tag name is one of: "script",
-                "style" */
-                case 'script': case 'style':
-                    /* Process the token as if the insertion mode had been "in
-                    head". */
-                    return $this->inHead($token);
-                break;
-
-                /* A start tag token whose tag name is one of: "base", "link",
-                "meta", "title" */
-                case 'base': case 'link': case 'meta': case 'title':
-                    /* Parse error. Process the token as if the insertion mode
-                    had    been "in head". */
-                    return $this->inHead($token);
-                break;
-
-                /* A start tag token with the tag name "body" */
-                case 'body':
-                    /* Parse error. If the second element on the stack of open
-                    elements is not a body element, or, if the stack of open
-                    elements has only one node on it, then ignore the token.
-                    (innerHTML case) */
-                    if(count($this->stack) === 1 || $this->stack[1]->nodeName !== 'body') {
-                        // Ignore
-
-                    /* Otherwise, for each attribute on the token, check to see
-                    if the attribute is already present on the body element (the
-                    second element)    on the stack of open elements. If it is not,
-                    add the attribute and its corresponding value to that
-                    element. */
-                    } else {
-                        foreach($token['attr'] as $attr) {
-                            if(!$this->stack[1]->hasAttribute($attr['name'])) {
-                                $this->stack[1]->setAttribute($attr['name'], $attr['value']);
-                            }
-                        }
-                    }
-                break;
-
-                /* A start tag whose tag name is one of: "address",
-                "blockquote", "center", "dir", "div", "dl", "fieldset",
-                "listing", "menu", "ol", "p", "ul" */
-                case 'address': case 'blockquote': case 'center': case 'dir':
-                case 'div': case 'dl': case 'fieldset': case 'listing':
-                case 'menu': case 'ol': case 'p': case 'ul':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag whose tag name is "form" */
-                case 'form':
-                    /* If the form element pointer is not null, ignore the
-                    token with a parse error. */
-                    if($this->form_pointer !== null) {
-                        // Ignore.
-
-                    /* Otherwise: */
-                    } else {
-                        /* If the stack of open elements has a p element in
-                        scope, then act as if an end tag with the tag name p
-                        had been seen. */
-                        if($this->elementInScope('p')) {
-                            $this->emitToken(array(
-                                'name' => 'p',
-                                'type' => HTML5::ENDTAG
-                            ));
-                        }
-
-                        /* Insert an HTML element for the token, and set the
-                        form element pointer to point to the element created. */
-                        $element = $this->insertElement($token);
-                        $this->form_pointer = $element;
-                    }
-                break;
-
-                /* A start tag whose tag name is "li", "dd" or "dt" */
-                case 'li': case 'dd': case 'dt':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    $stack_length = count($this->stack) - 1;
-
-                    for($n = $stack_length; 0 <= $n; $n--) {
-                        /* 1. Initialise node to be the current node (the
-                        bottommost node of the stack). */
-                        $stop = false;
-                        $node = $this->stack[$n];
-                        $cat  = $this->getElementCategory($node->tagName);
-
-                        /* 2. If node is an li, dd or dt element, then pop all
-                        the    nodes from the current node up to node, including
-                        node, then stop this algorithm. */
-                        if($token['name'] === $node->tagName ||    ($token['name'] !== 'li'
-                        && ($node->tagName === 'dd' || $node->tagName === 'dt'))) {
-                            for($x = $stack_length; $x >= $n ; $x--) {
-                                array_pop($this->stack);
-                            }
-
-                            break;
-                        }
-
-                        /* 3. If node is not in the formatting category, and is
-                        not    in the phrasing category, and is not an address or
-                        div element, then stop this algorithm. */
-                        if($cat !== self::FORMATTING && $cat !== self::PHRASING &&
-                        $node->tagName !== 'address' && $node->tagName !== 'div') {
-                            break;
-                        }
-                    }
-
-                    /* Finally, insert an HTML element with the same tag
-                    name as the    token's. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag token whose tag name is "plaintext" */
-                case 'plaintext':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    return HTML5::PLAINTEXT;
-                break;
-
-                /* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",
-                "h5", "h6" */
-                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* If the stack of open elements has in scope an element whose
-                    tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
-                    this is a parse error; pop elements from the stack until an
-                    element with one of those tag names has been popped from the
-                    stack. */
-                    while($this->elementInScope(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))) {
-                        array_pop($this->stack);
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag whose tag name is "a" */
-                case 'a':
-                    /* If the list of active formatting elements contains
-                    an element whose tag name is "a" between the end of the
-                    list and the last marker on the list (or the start of
-                    the list if there is no marker on the list), then this
-                    is a parse error; act as if an end tag with the tag name
-                    "a" had been seen, then remove that element from the list
-                    of active formatting elements and the stack of open
-                    elements if the end tag didn't already remove it (it
-                    might not have if the element is not in table scope). */
-                    $leng = count($this->a_formatting);
-
-                    for($n = $leng - 1; $n >= 0; $n--) {
-                        if($this->a_formatting[$n] === self::MARKER) {
-                            break;
-
-                        } elseif($this->a_formatting[$n]->nodeName === 'a') {
-                            $this->emitToken(array(
-                                'name' => 'a',
-                                'type' => HTML5::ENDTAG
-                            ));
-                            break;
-                        }
-                    }
-
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $el = $this->insertElement($token);
-
-                    /* Add that element to the list of active formatting
-                    elements. */
-                    $this->a_formatting[] = $el;
-                break;
-
-                /* A start tag whose tag name is one of: "b", "big", "em", "font",
-                "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
-                case 'b': case 'big': case 'em': case 'font': case 'i':
-                case 'nobr': case 's': case 'small': case 'strike':
-                case 'strong': case 'tt': case 'u':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $el = $this->insertElement($token);
-
-                    /* Add that element to the list of active formatting
-                    elements. */
-                    $this->a_formatting[] = $el;
-                break;
-
-                /* A start tag token whose tag name is "button" */
-                case 'button':
-                    /* If the stack of open elements has a button element in scope,
-                    then this is a parse error; act as if an end tag with the tag
-                    name "button" had been seen, then reprocess the token. (We don't
-                    do that. Unnecessary.) */
-                    if($this->elementInScope('button')) {
-                        $this->inBody(array(
-                            'name' => 'button',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Insert a marker at the end of the list of active
-                    formatting elements. */
-                    $this->a_formatting[] = self::MARKER;
-                break;
-
-                /* A start tag token whose tag name is one of: "marquee", "object" */
-                case 'marquee': case 'object':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Insert a marker at the end of the list of active
-                    formatting elements. */
-                    $this->a_formatting[] = self::MARKER;
-                break;
-
-                /* A start tag token whose tag name is "xmp" */
-                case 'xmp':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Switch the content model flag to the CDATA state. */
-                    return HTML5::CDATA;
-                break;
-
-                /* A start tag whose tag name is "table" */
-                case 'table':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Change the insertion mode to "in table". */
-                    $this->mode = self::IN_TABLE;
-                break;
-
-                /* A start tag whose tag name is one of: "area", "basefont",
-                "bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
-                case 'area': case 'basefont': case 'bgsound': case 'br':
-                case 'embed': case 'img': case 'param': case 'spacer':
-                case 'wbr':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Immediately pop the current node off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "hr" */
-                case 'hr':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Immediately pop the current node off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "image" */
-                case 'image':
-                    /* Parse error. Change the token's tag name to "img" and
-                    reprocess it. (Don't ask.) */
-                    $token['name'] = 'img';
-                    return $this->inBody($token);
-                break;
-
-                /* A start tag whose tag name is "input" */
-                case 'input':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an input element for the token. */
-                    $element = $this->insertElement($token, false);
-
-                    /* If the form element pointer is not null, then associate the
-                    input element with the form element pointed to by the form
-                    element pointer. */
-                    $this->form_pointer !== null
-                        ? $this->form_pointer->appendChild($element)
-                        : end($this->stack)->appendChild($element);
-
-                    /* Pop that input element off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "isindex" */
-                case 'isindex':
-                    /* Parse error. */
-                    // w/e
-
-                    /* If the form element pointer is not null,
-                    then ignore the token. */
-                    if($this->form_pointer === null) {
-                        /* Act as if a start tag token with the tag name "form" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'body',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "hr" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'hr',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "p" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'p',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "label"
-                        had been seen. */
-                        $this->inBody(array(
-                            'name' => 'label',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a stream of character tokens had been seen. */
-                        $this->insertText('This is a searchable index. '.
-                        'Insert your search keywords here: ');
-
-                        /* Act as if a start tag token with the tag name "input"
-                        had been seen, with all the attributes from the "isindex"
-                        token, except with the "name" attribute set to the value
-                        "isindex" (ignoring any explicit "name" attribute). */
-                        $attr = $token['attr'];
-                        $attr[] = array('name' => 'name', 'value' => 'isindex');
-
-                        $this->inBody(array(
-                            'name' => 'input',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => $attr
-                        ));
-
-                        /* Act as if a stream of character tokens had been seen
-                        (see below for what they should say). */
-                        $this->insertText('This is a searchable index. '.
-                        'Insert your search keywords here: ');
-
-                        /* Act as if an end tag token with the tag name "label"
-                        had been seen. */
-                        $this->inBody(array(
-                            'name' => 'label',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if an end tag token with the tag name "p" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if a start tag token with the tag name "hr" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'hr',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if an end tag token with the tag name "form" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'form',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-                break;
-
-                /* A start tag whose tag name is "textarea" */
-                case 'textarea':
-                    $this->insertElement($token);
-
-                    /* Switch the tokeniser's content model flag to the
-                    RCDATA state. */
-                    return HTML5::RCDATA;
-                break;
-
-                /* A start tag whose tag name is one of: "iframe", "noembed",
-                "noframes" */
-                case 'iframe': case 'noembed': case 'noframes':
-                    $this->insertElement($token);
-
-                    /* Switch the tokeniser's content model flag to the CDATA state. */
-                    return HTML5::CDATA;
-                break;
-
-                /* A start tag whose tag name is "select" */
-                case 'select':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Change the insertion mode to "in select". */
-                    $this->mode = self::IN_SELECT;
-                break;
-
-                /* A start or end tag whose tag name is one of: "caption", "col",
-                "colgroup", "frame", "frameset", "head", "option", "optgroup",
-                "tbody", "td", "tfoot", "th", "thead", "tr". */
-                case 'caption': case 'col': case 'colgroup': case 'frame':
-                case 'frameset': case 'head': case 'option': case 'optgroup':
-                case 'tbody': case 'td': case 'tfoot': case 'th': case 'thead':
-                case 'tr':
-                    // Parse error. Ignore the token.
-                break;
-
-                /* A start or end tag whose tag name is one of: "event-source",
-                "section", "nav", "article", "aside", "header", "footer",
-                "datagrid", "command" */
-                case 'event-source': case 'section': case 'nav': case 'article':
-                case 'aside': case 'header': case 'footer': case 'datagrid':
-                case 'command':
-                    // Work in progress!
-                break;
-
-                /* A start tag token not covered by the previous entries */
-                default:
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    $this->insertElement($token, true, true);
-                break;
-            }
-            break;
-
-            case HTML5::ENDTAG:
-            switch($token['name']) {
-                /* An end tag with the tag name "body" */
-                case 'body':
-                    /* If the second element in the stack of open elements is
-                    not a body element, this is a parse error. Ignore the token.
-                    (innerHTML case) */
-                    if(count($this->stack) < 2 || $this->stack[1]->nodeName !== 'body') {
-                        // Ignore.
-
-                    /* If the current node is not the body element, then this
-                    is a parse error. */
-                    } elseif(end($this->stack)->nodeName !== 'body') {
-                        // Parse error.
-                    }
-
-                    /* Change the insertion mode to "after body". */
-                    $this->mode = self::AFTER_BODY;
-                break;
-
-                /* An end tag with the tag name "html" */
-                case 'html':
-                    /* Act as if an end tag with tag name "body" had been seen,
-                    then, if that token wasn't ignored, reprocess the current
-                    token. */
-                    $this->inBody(array(
-                        'name' => 'body',
-                        'type' => HTML5::ENDTAG
-                    ));
-
-                    return $this->afterBody($token);
-                break;
-
-                /* An end tag whose tag name is one of: "address", "blockquote",
-                "center", "dir", "div", "dl", "fieldset", "listing", "menu",
-                "ol", "pre", "ul" */
-                case 'address': case 'blockquote': case 'center': case 'dir':
-                case 'div': case 'dl': case 'fieldset': case 'listing':
-                case 'menu': case 'ol': case 'pre': case 'ul':
-                    /* If the stack of open elements has an element in scope
-                    with the same tag name as that of the token, then generate
-                    implied end tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with
-                        the same tag name as that of the token, then this
-                        is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has an element in
-                        scope with the same tag name as that of the token,
-                        then pop elements from this stack until an element
-                        with that tag name has been popped from the stack. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is "form" */
-                case 'form':
-                    /* If the stack of open elements has an element in scope
-                    with the same tag name as that of the token, then generate
-                    implied    end tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                    } 
-
-                    if(end($this->stack)->nodeName !== $token['name']) {
-                        /* Now, if the current node is not an element with the
-                        same tag name as that of the token, then this is a parse
-                        error. */
-                        // w/e
-
-                    } else {
-                        /* Otherwise, if the current node is an element with
-                        the same tag name as that of the token pop that element
-                        from the stack. */
-                        array_pop($this->stack);
-                    }
-
-                    /* In any case, set the form element pointer to null. */
-                    $this->form_pointer = null;
-                break;
-
-                /* An end tag whose tag name is "p" */
-                case 'p':
-                    /* If the stack of open elements has a p element in scope,
-                    then generate implied end tags, except for p elements. */
-                    if($this->elementInScope('p')) {
-                        $this->generateImpliedEndTags(array('p'));
-
-                        /* If the current node is not a p element, then this is
-                        a parse error. */
-                        // k
-
-                        /* If the stack of open elements has a p element in
-                        scope, then pop elements from this stack until the stack
-                        no longer has a p element in scope. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->elementInScope('p')) {
-                                array_pop($this->stack);
-
-                            } else {
-                                break;
-                            }
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is "dd", "dt", or "li" */
-                case 'dd': case 'dt': case 'li':
-                    /* If the stack of open elements has an element in scope
-                    whose tag name matches the tag name of the token, then
-                    generate implied end tags, except for elements with the
-                    same tag name as the token. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags(array($token['name']));
-
-                        /* If the current node is not an element with the same
-                        tag name as the token, then this is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has an element in scope
-                        whose tag name matches the tag name of the token, then
-                        pop elements from this stack until an element with that
-                        tag name has been popped from the stack. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",
-                "h5", "h6" */
-                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
-                    $elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');
-
-                    /* If the stack of open elements has in scope an element whose
-                    tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
-                    generate implied end tags. */
-                    if($this->elementInScope($elements)) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with the same
-                        tag name as that of the token, then this is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has in scope an element
-                        whose tag name is one of "h1", "h2", "h3", "h4", "h5", or
-                        "h6", then pop elements from the stack until an element
-                        with one of those tag names has been popped from the stack. */
-                        while($this->elementInScope($elements)) {
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is one of: "a", "b", "big", "em",
-                "font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
-                case 'a': case 'b': case 'big': case 'em': case 'font':
-                case 'i': case 'nobr': case 's': case 'small': case 'strike':
-                case 'strong': case 'tt': case 'u':
-                    /* 1. Let the formatting element be the last element in
-                    the list of active formatting elements that:
-                        * is between the end of the list and the last scope
-                        marker in the list, if any, or the start of the list
-                        otherwise, and
-                        * has the same tag name as the token.
-                    */
-                    while(true) {
-                        for($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
-                            if($this->a_formatting[$a] === self::MARKER) {
-                                break;
-
-                            } elseif($this->a_formatting[$a]->tagName === $token['name']) {
-                                $formatting_element = $this->a_formatting[$a];
-                                $in_stack = in_array($formatting_element, $this->stack, true);
-                                $fe_af_pos = $a;
-                                break;
-                            }
-                        }
-
-                        /* If there is no such node, or, if that node is
-                        also in the stack of open elements but the element
-                        is not in scope, then this is a parse error. Abort
-                        these steps. The token is ignored. */
-                        if(!isset($formatting_element) || ($in_stack &&
-                        !$this->elementInScope($token['name']))) {
-                            break;
-
-                        /* Otherwise, if there is such a node, but that node
-                        is not in the stack of open elements, then this is a
-                        parse error; remove the element from the list, and
-                        abort these steps. */
-                        } elseif(isset($formatting_element) && !$in_stack) {
-                            unset($this->a_formatting[$fe_af_pos]);
-                            $this->a_formatting = array_merge($this->a_formatting);
-                            break;
-                        }
-
-                        /* 2. Let the furthest block be the topmost node in the
-                        stack of open elements that is lower in the stack
-                        than the formatting element, and is not an element in
-                        the phrasing or formatting categories. There might
-                        not be one. */
-                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
-                        $length = count($this->stack);
-
-                        for($s = $fe_s_pos + 1; $s < $length; $s++) {
-                            $category = $this->getElementCategory($this->stack[$s]->nodeName);
-
-                            if($category !== self::PHRASING && $category !== self::FORMATTING) {
-                                $furthest_block = $this->stack[$s];
-                            }
-                        }
-
-                        /* 3. If there is no furthest block, then the UA must
-                        skip the subsequent steps and instead just pop all
-                        the nodes from the bottom of the stack of open
-                        elements, from the current node up to the formatting
-                        element, and remove the formatting element from the
-                        list of active formatting elements. */
-                        if(!isset($furthest_block)) {
-                            for($n = $length - 1; $n >= $fe_s_pos; $n--) {
-                                array_pop($this->stack);
-                            }
-
-                            unset($this->a_formatting[$fe_af_pos]);
-                            $this->a_formatting = array_merge($this->a_formatting);
-                            break;
-                        }
-
-                        /* 4. Let the common ancestor be the element
-                        immediately above the formatting element in the stack
-                        of open elements. */
-                        $common_ancestor = $this->stack[$fe_s_pos - 1];
-
-                        /* 5. If the furthest block has a parent node, then
-                        remove the furthest block from its parent node. */
-                        if($furthest_block->parentNode !== null) {
-                            $furthest_block->parentNode->removeChild($furthest_block);
-                        }
-
-                        /* 6. Let a bookmark note the position of the
-                        formatting element in the list of active formatting
-                        elements relative to the elements on either side
-                        of it in the list. */
-                        $bookmark = $fe_af_pos;
-
-                        /* 7. Let node and last node  be the furthest block.
-                        Follow these steps: */
-                        $node = $furthest_block;
-                        $last_node = $furthest_block;
-
-                        while(true) {
-                            for($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
-                                /* 7.1 Let node be the element immediately
-                                prior to node in the stack of open elements. */
-                                $node = $this->stack[$n];
-
-                                /* 7.2 If node is not in the list of active
-                                formatting elements, then remove node from
-                                the stack of open elements and then go back
-                                to step 1. */
-                                if(!in_array($node, $this->a_formatting, true)) {
-                                    unset($this->stack[$n]);
-                                    $this->stack = array_merge($this->stack);
-
-                                } else {
-                                    break;
-                                }
-                            }
-
-                            /* 7.3 Otherwise, if node is the formatting
-                            element, then go to the next step in the overall
-                            algorithm. */
-                            if($node === $formatting_element) {
-                                break;
-
-                            /* 7.4 Otherwise, if last node is the furthest
-                            block, then move the aforementioned bookmark to
-                            be immediately after the node in the list of
-                            active formatting elements. */
-                            } elseif($last_node === $furthest_block) {
-                                $bookmark = array_search($node, $this->a_formatting, true) + 1;
-                            }
-
-                            /* 7.5 If node has any children, perform a
-                            shallow clone of node, replace the entry for
-                            node in the list of active formatting elements
-                            with an entry for the clone, replace the entry
-                            for node in the stack of open elements with an
-                            entry for the clone, and let node be the clone. */
-                            if($node->hasChildNodes()) {
-                                $clone = $node->cloneNode();
-                                $s_pos = array_search($node, $this->stack, true);
-                                $a_pos = array_search($node, $this->a_formatting, true);
-
-                                $this->stack[$s_pos] = $clone;
-                                $this->a_formatting[$a_pos] = $clone;
-                                $node = $clone;
-                            }
-
-                            /* 7.6 Insert last node into node, first removing
-                            it from its previous parent node if any. */
-                            if($last_node->parentNode !== null) {
-                                $last_node->parentNode->removeChild($last_node);
-                            }
-
-                            $node->appendChild($last_node);
-
-                            /* 7.7 Let last node be node. */
-                            $last_node = $node;
-                        }
-
-                        /* 8. Insert whatever last node ended up being in
-                        the previous step into the common ancestor node,
-                        first removing it from its previous parent node if
-                        any. */
-                        if($last_node->parentNode !== null) {
-                            $last_node->parentNode->removeChild($last_node);
-                        }
-
-                        $common_ancestor->appendChild($last_node);
-
-                        /* 9. Perform a shallow clone of the formatting
-                        element. */
-                        $clone = $formatting_element->cloneNode();
-
-                        /* 10. Take all of the child nodes of the furthest
-                        block and append them to the clone created in the
-                        last step. */
-                        while($furthest_block->hasChildNodes()) {
-                            $child = $furthest_block->firstChild;
-                            $furthest_block->removeChild($child);
-                            $clone->appendChild($child);
-                        }
-
-                        /* 11. Append that clone to the furthest block. */
-                        $furthest_block->appendChild($clone);
-
-                        /* 12. Remove the formatting element from the list
-                        of active formatting elements, and insert the clone
-                        into the list of active formatting elements at the
-                        position of the aforementioned bookmark. */
-                        $fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
-                        unset($this->a_formatting[$fe_af_pos]);
-                        $this->a_formatting = array_merge($this->a_formatting);
-
-                        $af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
-                        $af_part2 = array_slice($this->a_formatting, $bookmark, count($this->a_formatting));
-                        $this->a_formatting = array_merge($af_part1, array($clone), $af_part2);
-
-                        /* 13. Remove the formatting element from the stack
-                        of open elements, and insert the clone into the stack
-                        of open elements immediately after (i.e. in a more
-                        deeply nested position than) the position of the
-                        furthest block in that stack. */
-                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
-                        $fb_s_pos = array_search($furthest_block, $this->stack, true);
-                        unset($this->stack[$fe_s_pos]);
-
-                        $s_part1 = array_slice($this->stack, 0, $fb_s_pos);
-                        $s_part2 = array_slice($this->stack, $fb_s_pos + 1, count($this->stack));
-                        $this->stack = array_merge($s_part1, array($clone), $s_part2);
-
-                        /* 14. Jump back to step 1 in this series of steps. */
-                        unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
-                    }
-                break;
-
-                /* An end tag token whose tag name is one of: "button",
-                "marquee", "object" */
-                case 'button': case 'marquee': case 'object':
-                    /* If the stack of open elements has an element in scope whose
-                    tag name matches the tag name of the token, then generate implied
-                    tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with the same
-                        tag name as the token, then this is a parse error. */
-                        // k
-
-                        /* Now, if the stack of open elements has an element in scope
-                        whose tag name matches the tag name of the token, then pop
-                        elements from the stack until that element has been popped from
-                        the stack, and clear the list of active formatting elements up
-                        to the last marker. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-
-                        $marker = end(array_keys($this->a_formatting, self::MARKER, true));
-
-                        for($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
-                            array_pop($this->a_formatting);
-                        }
-                    }
-                break;
-
-                /* Or an end tag whose tag name is one of: "area", "basefont",
-                "bgsound", "br", "embed", "hr", "iframe", "image", "img",
-                "input", "isindex", "noembed", "noframes", "param", "select",
-                "spacer", "table", "textarea", "wbr" */
-                case 'area': case 'basefont': case 'bgsound': case 'br':
-                case 'embed': case 'hr': case 'iframe': case 'image':
-                case 'img': case 'input': case 'isindex': case 'noembed':
-                case 'noframes': case 'param': case 'select': case 'spacer':
-                case 'table': case 'textarea': case 'wbr':
-                    // Parse error. Ignore the token.
-                break;
-
-                /* An end tag token not covered by the previous entries */
-                default:
-                    for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                        /* Initialise node to be the current node (the bottommost
-                        node of the stack). */
-                        $node = end($this->stack);
-
-                        /* If node has the same tag name as the end tag token,
-                        then: */
-                        if($token['name'] === $node->nodeName) {
-                            /* Generate implied end tags. */
-                            $this->generateImpliedEndTags();
-
-                            /* If the tag name of the end tag token does not
-                            match the tag name of the current node, this is a
-                            parse error. */
-                            // k
-
-                            /* Pop all the nodes from the current node up to
-                            node, including node, then stop this algorithm. */
-                            for($x = count($this->stack) - $n; $x >= $n; $x--) {
-                                array_pop($this->stack);
-                            }
-                                    
-                        } else {
-                            $category = $this->getElementCategory($node);
-
-                            if($category !== self::SPECIAL && $category !== self::SCOPING) {
-                                /* Otherwise, if node is in neither the formatting
-                                category nor the phrasing category, then this is a
-                                parse error. Stop this algorithm. The end tag token
-                                is ignored. */
-                                return false;
-                            }
-                        }
-                    }
-                break;
-            }
-            break;
-        }
-    }
-
-    private function inTable($token) {
-        $clear = array('html', 'table');
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $text = $this->dom->createTextNode($token['data']);
-            end($this->stack)->appendChild($text);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            end($this->stack)->appendChild($comment);
-
-        /* A start tag whose tag name is "caption" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'caption') {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert a marker at the end of the list of active
-            formatting elements. */
-            $this->a_formatting[] = self::MARKER;
-
-            /* Insert an HTML element for the token, then switch the
-            insertion mode to "in caption". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CAPTION;
-
-        /* A start tag whose tag name is "colgroup" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'colgroup') {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the
-            insertion mode to "in column group". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CGROUP;
-
-        /* A start tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'col') {
-            $this->inTable(array(
-                'name' => 'colgroup',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            $this->inColumnGroup($token);
-
-        /* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('tbody', 'tfoot', 'thead'))) {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the insertion
-            mode to "in table body". */
-            $this->insertElement($token);
-            $this->mode = self::IN_TBODY;
-
-        /* A start tag whose tag name is one of: "td", "th", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        in_array($token['name'], array('td', 'th', 'tr'))) {
-            /* Act as if a start tag token with the tag name "tbody" had been
-            seen, then reprocess the current token. */
-            $this->inTable(array(
-                'name' => 'tbody',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inTableBody($token);
-
-        /* A start tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'table') {
-            /* Parse error. Act as if an end tag token with the tag name "table"
-            had been seen, then, if that token wasn't ignored, reprocess the
-            current token. */
-            $this->inTable(array(
-                'name' => 'table',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->mainPhase($token);
-
-        /* An end tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'table') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                return false;
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags. */
-                $this->generateImpliedEndTags();
-
-                /* Now, if the current node is not a table element, then this
-                is a parse error. */
-                // w/e
-
-                /* Pop elements from this stack until a table element has been
-                popped from the stack. */
-                while(true) {
-                    $current = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($current === 'table') {
-                        break;
-                    }
-                }
-
-                /* Reset the insertion mode appropriately. */
-                $this->resetInsertionMode();
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'tbody', 'td',
-        'tfoot', 'th', 'thead', 'tr'))) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* Parse error. Process the token as if the insertion mode was "in
-            body", with the following exception: */
-
-            /* If the current node is a table, tbody, tfoot, thead, or tr
-            element, then, whenever a node would be inserted into the current
-            node, it must instead be inserted into the foster parent element. */
-            if(in_array(end($this->stack)->nodeName,
-            array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
-                /* The foster parent element is the parent element of the last
-                table element in the stack of open elements, if there is a
-                table element and it has such a parent element. If there is no
-                table element in the stack of open elements (innerHTML case),
-                then the foster parent element is the first element in the
-                stack of open elements (the html  element). Otherwise, if there
-                is a table element in the stack of open elements, but the last
-                table element in the stack of open elements has no parent, or
-                its parent node is not an element, then the foster parent
-                element is the element before the last table element in the
-                stack of open elements. */
-                for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                    if($this->stack[$n]->nodeName === 'table') {
-                        $table = $this->stack[$n];
-                        break;
-                    }
-                }
-
-                if(isset($table) && $table->parentNode !== null) {
-                    $this->foster_parent = $table->parentNode;
-
-                } elseif(!isset($table)) {
-                    $this->foster_parent = $this->stack[0];
-
-                } elseif(isset($table) && ($table->parentNode === null ||
-                $table->parentNode->nodeType !== XML_ELEMENT_NODE)) {
-                    $this->foster_parent = $this->stack[$n - 1];
-                }
-            }
-
-            $this->inBody($token);
-        }
-    }
-
-    private function inCaption($token) {
-        /* An end tag whose tag name is "caption" */
-        if($token['type'] === HTML5::ENDTAG && $token['name'] === 'caption') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags. */
-                $this->generateImpliedEndTags();
-
-                /* Now, if the current node is not a caption element, then this
-                is a parse error. */
-                // w/e
-
-                /* Pop elements from this stack until a caption element has
-                been popped from the stack. */
-                while(true) {
-                    $node = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($node === 'caption') {
-                        break;
-                    }
-                }
-
-                /* Clear the list of active formatting elements up to the last
-                marker. */
-                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
-
-                /* Switch the insertion mode to "in table". */
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag
-        name is "table" */
-        } elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) || ($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'table')) {
-            /* Parse error. Act as if an end tag with the tag name "caption"
-            had been seen, then, if that token wasn't ignored, reprocess the
-            current token. */
-            $this->inCaption(array(
-                'name' => 'caption',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inTable($token);
-
-        /* An end tag whose tag name is one of: "body", "col", "colgroup",
-        "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'col', 'colgroup', 'html', 'tbody', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in body". */
-            $this->inBody($token);
-        }
-    }
-
-    private function inColumnGroup($token) {
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $text = $this->dom->createTextNode($token['data']);
-            end($this->stack)->appendChild($text);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            end($this->stack)->appendChild($comment);
-
-        /* A start tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'col') {
-            /* Insert a col element for the token. Immediately pop the current
-            node off the stack of open elements. */
-            $this->insertElement($token);
-            array_pop($this->stack);
-
-        /* An end tag whose tag name is "colgroup" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'colgroup') {
-            /* If the current node is the root html element, then this is a
-            parse error, ignore the token. (innerHTML case) */
-            if(end($this->stack)->nodeName === 'html') {
-                // Ignore
-
-            /* Otherwise, pop the current node (which will be a colgroup
-            element) from the stack of open elements. Switch the insertion
-            mode to "in table". */
-            } else {
-                array_pop($this->stack);
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* An end tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'col') {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Act as if an end tag with the tag name "colgroup" had been seen,
-            and then, if that token wasn't ignored, reprocess the current token. */
-            $this->inColumnGroup(array(
-                'name' => 'colgroup',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inTable($token);
-        }
-    }
-
-    private function inTableBody($token) {
-        $clear = array('tbody', 'tfoot', 'thead', 'html');
-
-        /* A start tag whose tag name is "tr" */
-        if($token['type'] === HTML5::STARTTAG && $token['name'] === 'tr') {
-            /* Clear the stack back to a table body context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert a tr element for the token, then switch the insertion
-            mode to "in row". */
-            $this->insertElement($token);
-            $this->mode = self::IN_ROW;
-
-        /* A start tag whose tag name is one of: "th", "td" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        ($token['name'] === 'th' ||    $token['name'] === 'td')) {
-            /* Parse error. Act as if a start tag with the tag name "tr" had
-            been seen, then reprocess the current token. */
-            $this->inTableBody(array(
-                'name' => 'tr',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inRow($token);
-
-        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table body context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Pop the current node from the stack of open elements. Switch
-                the insertion mode to "in table". */
-                array_pop($this->stack);
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
-        } elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'tfoor', 'thead'))) ||
-        ($token['type'] === HTML5::STARTTAG && $token['name'] === 'table')) {
-            /* If the stack of open elements does not have a tbody, thead, or
-            tfoot element in table scope, this is a parse error. Ignore the
-            token. (innerHTML case) */
-            if(!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table body context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Act as if an end tag with the same tag name as the current
-                node ("tbody", "tfoot", or "thead") had been seen, then
-                reprocess the current token. */
-                $this->inTableBody(array(
-                    'name' => end($this->stack)->nodeName,
-                    'type' => HTML5::ENDTAG
-                ));
-
-                return $this->mainPhase($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "td", "th", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in table". */
-            $this->inTable($token);
-        }
-    }
-
-    private function inRow($token) {
-        $clear = array('tr', 'html');
-
-        /* A start tag whose tag name is one of: "th", "td" */
-        if($token['type'] === HTML5::STARTTAG &&
-        ($token['name'] === 'th' || $token['name'] === 'td')) {
-            /* Clear the stack back to a table row context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the insertion
-            mode to "in cell". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CELL;
-
-            /* Insert a marker at the end of the list of active formatting
-            elements. */
-            $this->a_formatting[] = self::MARKER;
-
-        /* An end tag whose tag name is "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'tr') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table row context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Pop the current node (which will be a tr element) from the
-                stack of open elements. Switch the insertion mode to "in table
-                body". */
-                array_pop($this->stack);
-                $this->mode = self::IN_TBODY;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr'))) {
-            /* Act as if an end tag with the tag name "tr" had been seen, then,
-            if that token wasn't ignored, reprocess the current token. */
-            $this->inRow(array(
-                'name' => 'tr',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inCell($token);
-
-        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Otherwise, act as if an end tag with the tag name "tr" had
-                been seen, then reprocess the current token. */
-                $this->inRow(array(
-                    'name' => 'tr',
-                    'type' => HTML5::ENDTAG
-                ));
-
-                return $this->inCell($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "td", "th" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in table". */
-            $this->inTable($token);
-        }
-    }
-
-    private function inCell($token) {
-        /* An end tag whose tag name is one of: "td", "th" */
-        if($token['type'] === HTML5::ENDTAG &&
-        ($token['name'] === 'td' || $token['name'] === 'th')) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as that of the token, then this is a
-            parse error and the token must be ignored. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags, except for elements with the same
-                tag name as the token. */
-                $this->generateImpliedEndTags(array($token['name']));
-
-                /* Now, if the current node is not an element with the same tag
-                name as the token, then this is a parse error. */
-                // k
-
-                /* Pop elements from this stack until an element with the same
-                tag name as the token has been popped from the stack. */
-                while(true) {
-                    $node = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($node === $token['name']) {
-                        break;
-                    }
-                }
-
-                /* Clear the list of active formatting elements up to the last
-                marker. */
-                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
-
-                /* Switch the insertion mode to "in row". (The current node
-                will be a tr element at this point.) */
-                $this->mode = self::IN_ROW;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            /* If the stack of open elements does not have a td or th element
-            in table scope, then this is a parse error; ignore the token.
-            (innerHTML case) */
-            if(!$this->elementInScope(array('td', 'th'), true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            /* If the stack of open elements does not have a td or th element
-            in table scope, then this is a parse error; ignore the token.
-            (innerHTML case) */
-            if(!$this->elementInScope(array('td', 'th'), true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html'))) {
-            /* Parse error. Ignore the token. */
-
-        /* An end tag whose tag name is one of: "table", "tbody", "tfoot",
-        "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as that of the token (which can only
-            happen for "tbody", "tfoot" and "thead", or, in the innerHTML case),
-            then this is a parse error and the token must be ignored. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in body". */
-            $this->inBody($token);
-        }
-    }
-
-    private function inSelect($token) {
-        /* Handle the token as follows: */
-
-        /* A character token */
-        if($token['type'] === HTML5::CHARACTR) {
-            /* Append the token's character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token whose tag name is "option" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'option') {
-            /* If the current node is an option element, act as if an end tag
-            with the tag name "option" had been seen. */
-            if(end($this->stack)->nodeName === 'option') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-        /* A start tag token whose tag name is "optgroup" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'optgroup') {
-            /* If the current node is an option element, act as if an end tag
-            with the tag name "option" had been seen. */
-            if(end($this->stack)->nodeName === 'option') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* If the current node is an optgroup element, act as if an end tag
-            with the tag name "optgroup" had been seen. */
-            if(end($this->stack)->nodeName === 'optgroup') {
-                $this->inSelect(array(
-                    'name' => 'optgroup',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-        /* An end tag token whose tag name is "optgroup" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'optgroup') {
-            /* First, if the current node is an option element, and the node
-            immediately before it in the stack of open elements is an optgroup
-            element, then act as if an end tag with the tag name "option" had
-            been seen. */
-            $elements_in_stack = count($this->stack);
-
-            if($this->stack[$elements_in_stack - 1]->nodeName === 'option' &&
-            $this->stack[$elements_in_stack - 2]->nodeName === 'optgroup') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* If the current node is an optgroup element, then pop that node
-            from the stack of open elements. Otherwise, this is a parse error,
-            ignore the token. */
-            if($this->stack[$elements_in_stack - 1] === 'optgroup') {
-                array_pop($this->stack);
-            }
-
-        /* An end tag token whose tag name is "option" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'option') {
-            /* If the current node is an option element, then pop that node
-            from the stack of open elements. Otherwise, this is a parse error,
-            ignore the token. */
-            if(end($this->stack)->nodeName === 'option') {
-                array_pop($this->stack);
-            }
-
-        /* An end tag whose tag name is "select" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'select') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // w/e
-
-            /* Otherwise: */
-            } else {
-                /* Pop elements from the stack of open elements until a select
-                element has been popped from the stack. */
-                while(true) {
-                    $current = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($current === 'select') {
-                        break;
-                    }
-                }
-
-                /* Reset the insertion mode appropriately. */
-                $this->resetInsertionMode();
-            }
-
-        /* A start tag whose tag name is "select" */
-        } elseif($token['name'] === 'select' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Parse error. Act as if the token had been an end tag with the
-            tag name "select" instead. */
-            $this->inSelect(array(
-                'name' => 'select',
-                'type' => HTML5::ENDTAG
-            ));
-
-        /* An end tag whose tag name is one of: "caption", "table", "tbody",
-        "tfoot", "thead", "tr", "td", "th" */
-        } elseif(in_array($token['name'], array('caption', 'table', 'tbody',
-        'tfoot', 'thead', 'tr', 'td', 'th')) && $token['type'] === HTML5::ENDTAG) {
-            /* Parse error. */
-            // w/e
-
-            /* If the stack of open elements has an element in table scope with
-            the same tag name as that of the token, then act as if an end tag
-            with the tag name "select" had been seen, and reprocess the token.
-            Otherwise, ignore the token. */
-            if($this->elementInScope($token['name'], true)) {
-                $this->inSelect(array(
-                    'name' => 'select',
-                    'type' => HTML5::ENDTAG
-                ));
-
-                $this->mainPhase($token);
-            }
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function afterBody($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Process the token as it would be processed if the insertion mode
-            was "in body". */
-            $this->inBody($token);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the first element in the stack of open
-            elements (the html element), with the data attribute set to the
-            data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->stack[0]->appendChild($comment);
-
-        /* An end tag with the tag name "html" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') {
-            /* If the parser was originally created in order to handle the
-            setting of an element's innerHTML attribute, this is a parse error;
-            ignore the token. (The element will be an html element in this
-            case.) (innerHTML case) */
-
-            /* Otherwise, switch to the trailing end phase. */
-            $this->phase = self::END_PHASE;
-
-        /* Anything else */
-        } else {
-            /* Parse error. Set the insertion mode to "in body" and reprocess
-            the token. */
-            $this->mode = self::IN_BODY;
-            return $this->inBody($token);
-        }
-    }
-
-    private function inFrameset($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag with the tag name "frameset" */
-        } elseif($token['name'] === 'frameset' &&
-        $token['type'] === HTML5::STARTTAG) {
-            $this->insertElement($token);
-
-        /* An end tag with the tag name "frameset" */
-        } elseif($token['name'] === 'frameset' &&
-        $token['type'] === HTML5::ENDTAG) {
-            /* If the current node is the root html element, then this is a
-            parse error; ignore the token. (innerHTML case) */
-            if(end($this->stack)->nodeName === 'html') {
-                // Ignore
-
-            } else {
-                /* Otherwise, pop the current node from the stack of open
-                elements. */
-                array_pop($this->stack);
-
-                /* If the parser was not originally created in order to handle
-                the setting of an element's innerHTML attribute (innerHTML case),
-                and the current node is no longer a frameset element, then change
-                the insertion mode to "after frameset". */
-                $this->mode = self::AFTR_FRAME;
-            }
-
-        /* A start tag with the tag name "frame" */
-        } elseif($token['name'] === 'frame' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-            /* Immediately pop the current node off the stack of open elements. */
-            array_pop($this->stack);
-
-        /* A start tag with the tag name "noframes" */
-        } elseif($token['name'] === 'noframes' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Process the token as if the insertion mode had been "in body". */
-            $this->inBody($token);
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function afterFrameset($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* An end tag with the tag name "html" */
-        } elseif($token['name'] === 'html' &&
-        $token['type'] === HTML5::ENDTAG) {
-            /* Switch to the trailing end phase. */
-            $this->phase = self::END_PHASE;
-
-        /* A start tag with the tag name "noframes" */
-        } elseif($token['name'] === 'noframes' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Process the token as if the insertion mode had been "in body". */
-            $this->inBody($token);
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function trailingEndPhase($token) {
-        /* After the main phase, as each token is emitted from the tokenisation
-        stage, it must be processed as described in this section. */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the Document object with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->dom->appendChild($comment);
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Process the token as it would be processed in the main phase. */
-            $this->mainPhase($token);
-
-        /* A character token that is not one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE. Or a start tag token. Or an end tag token. */
-        } elseif(($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
-        $token['type'] === HTML5::STARTTAG || $token['type'] === HTML5::ENDTAG) {
-            /* Parse error. Switch back to the main phase and reprocess the
-            token. */
-            $this->phase = self::MAIN_PHASE;
-            return $this->mainPhase($token);
-
-        /* An end-of-file token */
-        } elseif($token['type'] === HTML5::EOF) {
-            /* OMG DONE!! */
-        }
-    }
-
-    private function insertElement($token, $append = true, $check = false) {
-        // Proprietary workaround for libxml2's limitations with tag names
-        if ($check) {
-            // Slightly modified HTML5 tag-name modification,
-            // removing anything that's not an ASCII letter, digit, or hyphen
-            $token['name'] = preg_replace('/[^a-z0-9-]/i', '', $token['name']);
-            // Remove leading hyphens and numbers
-            $token['name'] = ltrim($token['name'], '-0..9');
-            // In theory, this should ever be needed, but just in case
-            if ($token['name'] === '') $token['name'] = 'span'; // arbitrary generic choice
-        }
-        
-        $el = $this->dom->createElement($token['name']);
-
-        foreach($token['attr'] as $attr) {
-            if(!$el->hasAttribute($attr['name'])) {
-                $el->setAttribute($attr['name'], $attr['value']);
-            }
-        }
-
-        $this->appendToRealParent($el);
-        $this->stack[] = $el;
-
-        return $el;
-    }
-
-    private function insertText($data) {
-        $text = $this->dom->createTextNode($data);
-        $this->appendToRealParent($text);
-    }
-
-    private function insertComment($data) {
-        $comment = $this->dom->createComment($data);
-        $this->appendToRealParent($comment);
-    }
-
-    private function appendToRealParent($node) {
-        if($this->foster_parent === null) {
-            end($this->stack)->appendChild($node);
-
-        } elseif($this->foster_parent !== null) {
-            /* If the foster parent element is the parent element of the
-            last table element in the stack of open elements, then the new
-            node must be inserted immediately before the last table element
-            in the stack of open elements in the foster parent element;
-            otherwise, the new node must be appended to the foster parent
-            element. */
-            for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                if($this->stack[$n]->nodeName === 'table' &&
-                $this->stack[$n]->parentNode !== null) {
-                    $table = $this->stack[$n];
-                    break;
-                }
-            }
-
-            if(isset($table) && $this->foster_parent->isSameNode($table->parentNode))
-                $this->foster_parent->insertBefore($node, $table);
-            else
-                $this->foster_parent->appendChild($node);
-
-            $this->foster_parent = null;
-        }
-    }
-
-    private function elementInScope($el, $table = false) {
-        if(is_array($el)) {
-            foreach($el as $element) {
-                if($this->elementInScope($element, $table)) {
-                    return true;
-                }
-            }
-
-            return false;
-        }
-
-        $leng = count($this->stack);
-
-        for($n = 0; $n < $leng; $n++) {
-            /* 1. Initialise node to be the current node (the bottommost node of
-            the stack). */
-            $node = $this->stack[$leng - 1 - $n];
-
-            if($node->tagName === $el) {
-                /* 2. If node is the target node, terminate in a match state. */
-                return true;
-
-            } elseif($node->tagName === 'table') {
-                /* 3. Otherwise, if node is a table element, terminate in a failure
-                state. */
-                return false;
-
-            } elseif($table === true && in_array($node->tagName, array('caption', 'td',
-            'th', 'button', 'marquee', 'object'))) {
-                /* 4. Otherwise, if the algorithm is the "has an element in scope"
-                variant (rather than the "has an element in table scope" variant),
-                and node is one of the following, terminate in a failure state. */
-                return false;
-
-            } elseif($node === $node->ownerDocument->documentElement) {
-                /* 5. Otherwise, if node is an html element (root element), terminate
-                in a failure state. (This can only happen if the node is the topmost
-                node of the    stack of open elements, and prevents the next step from
-                being invoked if there are no more elements in the stack.) */
-                return false;
-            }
-
-            /* Otherwise, set node to the previous entry in the stack of open
-            elements and return to step 2. (This will never fail, since the loop
-            will always terminate in the previous step if the top of the stack
-            is reached.) */
-        }
-    }
-
-    private function reconstructActiveFormattingElements() {
-        /* 1. If there are no entries in the list of active formatting elements,
-        then there is nothing to reconstruct; stop this algorithm. */
-        $formatting_elements = count($this->a_formatting);
-
-        if($formatting_elements === 0) {
-            return false;
-        }
-
-        /* 3. Let entry be the last (most recently added) element in the list
-        of active formatting elements. */
-        $entry = end($this->a_formatting);
-
-        /* 2. If the last (most recently added) entry in the list of active
-        formatting elements is a marker, or if it is an element that is in the
-        stack of open elements, then there is nothing to reconstruct; stop this
-        algorithm. */
-        if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
-            return false;
-        }
-
-        for($a = $formatting_elements - 1; $a >= 0; true) {
-            /* 4. If there are no entries before entry in the list of active
-            formatting elements, then jump to step 8. */
-            if($a === 0) {
-                $step_seven = false;
-                break;
-            }
-
-            /* 5. Let entry be the entry one earlier than entry in the list of
-            active formatting elements. */
-            $a--;
-            $entry = $this->a_formatting[$a];
-
-            /* 6. If entry is neither a marker nor an element that is also in
-            thetack of open elements, go to step 4. */
-            if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
-                break;
-            }
-        }
-
-        while(true) {
-            /* 7. Let entry be the element one later than entry in the list of
-            active formatting elements. */
-            if(isset($step_seven) && $step_seven === true) {
-                $a++;
-                $entry = $this->a_formatting[$a];
-            }
-
-            /* 8. Perform a shallow clone of the element entry to obtain clone. */
-            $clone = $entry->cloneNode();
-
-            /* 9. Append clone to the current node and push it onto the stack
-            of open elements  so that it is the new current node. */
-            end($this->stack)->appendChild($clone);
-            $this->stack[] = $clone;
-
-            /* 10. Replace the entry for entry in the list with an entry for
-            clone. */
-            $this->a_formatting[$a] = $clone;
-
-            /* 11. If the entry for clone in the list of active formatting
-            elements is not the last entry in the list, return to step 7. */
-            if(end($this->a_formatting) !== $clone) {
-                $step_seven = true;
-            } else {
-                break;
-            }
-        }
-    }
-
-    private function clearTheActiveFormattingElementsUpToTheLastMarker() {
-        /* When the steps below require the UA to clear the list of active
-        formatting elements up to the last marker, the UA must perform the
-        following steps: */
-
-        while(true) {
-            /* 1. Let entry be the last (most recently added) entry in the list
-            of active formatting elements. */
-            $entry = end($this->a_formatting);
-
-            /* 2. Remove entry from the list of active formatting elements. */
-            array_pop($this->a_formatting);
-
-            /* 3. If entry was a marker, then stop the algorithm at this point.
-            The list has been cleared up to the last marker. */
-            if($entry === self::MARKER) {
-                break;
-            }
-        }
-    }
-
-    private function generateImpliedEndTags($exclude = array()) {
-        /* When the steps below require the UA to generate implied end tags,
-        then, if the current node is a dd element, a dt element, an li element,
-        a p element, a td element, a th  element, or a tr element, the UA must
-        act as if an end tag with the respective tag name had been seen and
-        then generate implied end tags again. */
-        $node = end($this->stack);
-        $elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);
-
-        while(in_array(end($this->stack)->nodeName, $elements)) {
-            array_pop($this->stack);
-        }
-    }
-
-    private function getElementCategory($node) {
-        $name = $node->tagName;
-        if(in_array($name, $this->special))
-            return self::SPECIAL;
-
-        elseif(in_array($name, $this->scoping))
-            return self::SCOPING;
-
-        elseif(in_array($name, $this->formatting))
-            return self::FORMATTING;
-
-        else
-            return self::PHRASING;
-    }
-
-    private function clearStackToTableContext($elements) {
-        /* When the steps above require the UA to clear the stack back to a
-        table context, it means that the UA must, while the current node is not
-        a table element or an html element, pop elements from the stack of open
-        elements. If this causes any elements to be popped from the stack, then
-        this is a parse error. */
-        while(true) {
-            $node = end($this->stack)->nodeName;
-
-            if(in_array($node, $elements)) {
-                break;
-            } else {
-                array_pop($this->stack);
-            }
-        }
-    }
-
-    private function resetInsertionMode() {
-        /* 1. Let last be false. */
-        $last = false;
-        $leng = count($this->stack);
-
-        for($n = $leng - 1; $n >= 0; $n--) {
-            /* 2. Let node be the last node in the stack of open elements. */
-            $node = $this->stack[$n];
-
-            /* 3. If node is the first node in the stack of open elements, then
-            set last to true. If the element whose innerHTML  attribute is being
-            set is neither a td  element nor a th element, then set node to the
-            element whose innerHTML  attribute is being set. (innerHTML  case) */
-            if($this->stack[0]->isSameNode($node)) {
-                $last = true;
-            }
-
-            /* 4. If node is a select element, then switch the insertion mode to
-            "in select" and abort these steps. (innerHTML case) */
-            if($node->nodeName === 'select') {
-                $this->mode = self::IN_SELECT;
-                break;
-
-            /* 5. If node is a td or th element, then switch the insertion mode
-            to "in cell" and abort these steps. */
-            } elseif($node->nodeName === 'td' || $node->nodeName === 'th') {
-                $this->mode = self::IN_CELL;
-                break;
-
-            /* 6. If node is a tr element, then switch the insertion mode to
-            "in    row" and abort these steps. */
-            } elseif($node->nodeName === 'tr') {
-                $this->mode = self::IN_ROW;
-                break;
-
-            /* 7. If node is a tbody, thead, or tfoot element, then switch the
-            insertion mode to "in table body" and abort these steps. */
-            } elseif(in_array($node->nodeName, array('tbody', 'thead', 'tfoot'))) {
-                $this->mode = self::IN_TBODY;
-                break;
-
-            /* 8. If node is a caption element, then switch the insertion mode
-            to "in caption" and abort these steps. */
-            } elseif($node->nodeName === 'caption') {
-                $this->mode = self::IN_CAPTION;
-                break;
-
-            /* 9. If node is a colgroup element, then switch the insertion mode
-            to "in column group" and abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'colgroup') {
-                $this->mode = self::IN_CGROUP;
-                break;
-
-            /* 10. If node is a table element, then switch the insertion mode
-            to "in table" and abort these steps. */
-            } elseif($node->nodeName === 'table') {
-                $this->mode = self::IN_TABLE;
-                break;
-
-            /* 11. If node is a head element, then switch the insertion mode
-            to "in body" ("in body"! not "in head"!) and abort these steps.
-            (innerHTML case) */
-            } elseif($node->nodeName === 'head') {
-                $this->mode = self::IN_BODY;
-                break;
-
-            /* 12. If node is a body element, then switch the insertion mode to
-            "in body" and abort these steps. */
-            } elseif($node->nodeName === 'body') {
-                $this->mode = self::IN_BODY;
-                break;
-
-            /* 13. If node is a frameset element, then switch the insertion
-            mode to "in frameset" and abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'frameset') {
-                $this->mode = self::IN_FRAME;
-                break;
-
-            /* 14. If node is an html element, then: if the head element
-            pointer is null, switch the insertion mode to "before head",
-            otherwise, switch the insertion mode to "after head". In either
-            case, abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'html') {
-                $this->mode = ($this->head_pointer === null)
-                    ? self::BEFOR_HEAD
-                    : self::AFTER_HEAD;
-
-                break;
-
-            /* 15. If last is true, then set the insertion mode to "in body"
-            and    abort these steps. (innerHTML case) */
-            } elseif($last) {
-                $this->mode = self::IN_BODY;
-                break;
-            }
-        }
-    }
-
-    private function closeCell() {
-        /* If the stack of open elements has a td or th element in table scope,
-        then act as if an end tag token with that tag name had been seen. */
-        foreach(array('td', 'th') as $cell) {
-            if($this->elementInScope($cell, true)) {
-                $this->inCell(array(
-                    'name' => $cell,
-                    'type' => HTML5::ENDTAG
-                ));
-
-                break;
-            }
-        }
-    }
-
-    public function save() {
-        return $this->dom;
-    }
-}
-?>
diff --git a/library/HTMLPurifier/Strategy/FixNesting.php b/library/HTMLPurifier/Strategy/FixNesting.php
deleted file mode 100644
index f81802391b..0000000000
--- a/library/HTMLPurifier/Strategy/FixNesting.php
+++ /dev/null
@@ -1,328 +0,0 @@
-<?php
-
-/**
- * Takes a well formed list of tokens and fixes their nesting.
- *
- * HTML elements dictate which elements are allowed to be their children,
- * for example, you can't have a p tag in a span tag.  Other elements have
- * much more rigorous definitions: tables, for instance, require a specific
- * order for their elements.  There are also constraints not expressible by
- * document type definitions, such as the chameleon nature of ins/del
- * tags and global child exclusions.
- *
- * The first major objective of this strategy is to iterate through all the
- * nodes (not tokens) of the list of tokens and determine whether or not
- * their children conform to the element's definition.  If they do not, the
- * child definition may optionally supply an amended list of elements that
- * is valid or require that the entire node be deleted (and the previous
- * node rescanned).
- *
- * The second objective is to ensure that explicitly excluded elements of
- * an element do not appear in its children.  Code that accomplishes this
- * task is pervasive through the strategy, though the two are distinct tasks
- * and could, theoretically, be seperated (although it's not recommended).
- *
- * @note Whether or not unrecognized children are silently dropped or
- *       translated into text depends on the child definitions.
- *
- * @todo Enable nodes to be bubbled out of the structure.
- */
-
-class HTMLPurifier_Strategy_FixNesting extends HTMLPurifier_Strategy
-{
-
-    public function execute($tokens, $config, $context) {
-        //####################################################################//
-        // Pre-processing
-
-        // get a copy of the HTML definition
-        $definition = $config->getHTMLDefinition();
-
-        // insert implicit "parent" node, will be removed at end.
-        // DEFINITION CALL
-        $parent_name = $definition->info_parent;
-        array_unshift($tokens, new HTMLPurifier_Token_Start($parent_name));
-        $tokens[] = new HTMLPurifier_Token_End($parent_name);
-
-        // setup the context variable 'IsInline', for chameleon processing
-        // is 'false' when we are not inline, 'true' when it must always
-        // be inline, and an integer when it is inline for a certain
-        // branch of the document tree
-        $is_inline = $definition->info_parent_def->descendants_are_inline;
-        $context->register('IsInline', $is_inline);
-
-        // setup error collector
-        $e =& $context->get('ErrorCollector', true);
-
-        //####################################################################//
-        // Loop initialization
-
-        // stack that contains the indexes of all parents,
-        // $stack[count($stack)-1] being the current parent
-        $stack = array();
-
-        // stack that contains all elements that are excluded
-        // it is organized by parent elements, similar to $stack,
-        // but it is only populated when an element with exclusions is
-        // processed, i.e. there won't be empty exclusions.
-        $exclude_stack = array();
-
-        // variable that contains the start token while we are processing
-        // nodes. This enables error reporting to do its job
-        $start_token = false;
-        $context->register('CurrentToken', $start_token);
-
-        //####################################################################//
-        // Loop
-
-        // iterate through all start nodes. Determining the start node
-        // is complicated so it has been omitted from the loop construct
-        for ($i = 0, $size = count($tokens) ; $i < $size; ) {
-
-            //################################################################//
-            // Gather information on children
-
-            // child token accumulator
-            $child_tokens = array();
-
-            // scroll to the end of this node, report number, and collect
-            // all children
-            for ($j = $i, $depth = 0; ; $j++) {
-                if ($tokens[$j] instanceof HTMLPurifier_Token_Start) {
-                    $depth++;
-                    // skip token assignment on first iteration, this is the
-                    // token we currently are on
-                    if ($depth == 1) continue;
-                } elseif ($tokens[$j] instanceof HTMLPurifier_Token_End) {
-                    $depth--;
-                    // skip token assignment on last iteration, this is the
-                    // end token of the token we're currently on
-                    if ($depth == 0) break;
-                }
-                $child_tokens[] = $tokens[$j];
-            }
-
-            // $i is index of start token
-            // $j is index of end token
-
-            $start_token = $tokens[$i]; // to make token available via CurrentToken
-
-            //################################################################//
-            // Gather information on parent
-
-            // calculate parent information
-            if ($count = count($stack)) {
-                $parent_index = $stack[$count-1];
-                $parent_name  = $tokens[$parent_index]->name;
-                if ($parent_index == 0) {
-                    $parent_def   = $definition->info_parent_def;
-                } else {
-                    $parent_def   = $definition->info[$parent_name];
-                }
-            } else {
-                // processing as if the parent were the "root" node
-                // unknown info, it won't be used anyway, in the future,
-                // we may want to enforce one element only (this is
-                // necessary for HTML Purifier to clean entire documents
-                $parent_index = $parent_name = $parent_def = null;
-            }
-
-            // calculate context
-            if ($is_inline === false) {
-                // check if conditions make it inline
-                if (!empty($parent_def) && $parent_def->descendants_are_inline) {
-                    $is_inline = $count - 1;
-                }
-            } else {
-                // check if we're out of inline
-                if ($count === $is_inline) {
-                    $is_inline = false;
-                }
-            }
-
-            //################################################################//
-            // Determine whether element is explicitly excluded SGML-style
-
-            // determine whether or not element is excluded by checking all
-            // parent exclusions. The array should not be very large, two
-            // elements at most.
-            $excluded = false;
-            if (!empty($exclude_stack)) {
-                foreach ($exclude_stack as $lookup) {
-                    if (isset($lookup[$tokens[$i]->name])) {
-                        $excluded = true;
-                        // no need to continue processing
-                        break;
-                    }
-                }
-            }
-
-            //################################################################//
-            // Perform child validation
-
-            if ($excluded) {
-                // there is an exclusion, remove the entire node
-                $result = false;
-                $excludes = array(); // not used, but good to initialize anyway
-            } else {
-                // DEFINITION CALL
-                if ($i === 0) {
-                    // special processing for the first node
-                    $def = $definition->info_parent_def;
-                } else {
-                    $def = $definition->info[$tokens[$i]->name];
-
-                }
-
-                if (!empty($def->child)) {
-                    // have DTD child def validate children
-                    $result = $def->child->validateChildren(
-                        $child_tokens, $config, $context);
-                } else {
-                    // weird, no child definition, get rid of everything
-                    $result = false;
-                }
-
-                // determine whether or not this element has any exclusions
-                $excludes = $def->excludes;
-            }
-
-            // $result is now a bool or array
-
-            //################################################################//
-            // Process result by interpreting $result
-
-            if ($result === true || $child_tokens === $result) {
-                // leave the node as is
-
-                // register start token as a parental node start
-                $stack[] = $i;
-
-                // register exclusions if there are any
-                if (!empty($excludes)) $exclude_stack[] = $excludes;
-
-                // move cursor to next possible start node
-                $i++;
-
-            } elseif($result === false) {
-                // remove entire node
-
-                if ($e) {
-                    if ($excluded) {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node excluded');
-                    } else {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node removed');
-                    }
-                }
-
-                // calculate length of inner tokens and current tokens
-                $length = $j - $i + 1;
-
-                // perform removal
-                array_splice($tokens, $i, $length);
-
-                // update size
-                $size -= $length;
-
-                // there is no start token to register,
-                // current node is now the next possible start node
-                // unless it turns out that we need to do a double-check
-
-                // this is a rought heuristic that covers 100% of HTML's
-                // cases and 99% of all other cases. A child definition
-                // that would be tricked by this would be something like:
-                // ( | a b c) where it's all or nothing. Fortunately,
-                // our current implementation claims that that case would
-                // not allow empty, even if it did
-                if (!$parent_def->child->allow_empty) {
-                    // we need to do a double-check
-                    $i = $parent_index;
-                    array_pop($stack);
-                }
-
-                // PROJECTED OPTIMIZATION: Process all children elements before
-                // reprocessing parent node.
-
-            } else {
-                // replace node with $result
-
-                // calculate length of inner tokens
-                $length = $j - $i - 1;
-
-                if ($e) {
-                    if (empty($result) && $length) {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node contents removed');
-                    } else {
-                        $e->send(E_WARNING, 'Strategy_FixNesting: Node reorganized');
-                    }
-                }
-
-                // perform replacement
-                array_splice($tokens, $i + 1, $length, $result);
-
-                // update size
-                $size -= $length;
-                $size += count($result);
-
-                // register start token as a parental node start
-                $stack[] = $i;
-
-                // register exclusions if there are any
-                if (!empty($excludes)) $exclude_stack[] = $excludes;
-
-                // move cursor to next possible start node
-                $i++;
-
-            }
-
-            //################################################################//
-            // Scroll to next start node
-
-            // We assume, at this point, that $i is the index of the token
-            // that is the first possible new start point for a node.
-
-            // Test if the token indeed is a start tag, if not, move forward
-            // and test again.
-            $size = count($tokens);
-            while ($i < $size and !$tokens[$i] instanceof HTMLPurifier_Token_Start) {
-                if ($tokens[$i] instanceof HTMLPurifier_Token_End) {
-                    // pop a token index off the stack if we ended a node
-                    array_pop($stack);
-                    // pop an exclusion lookup off exclusion stack if
-                    // we ended node and that node had exclusions
-                    if ($i == 0 || $i == $size - 1) {
-                        // use specialized var if it's the super-parent
-                        $s_excludes = $definition->info_parent_def->excludes;
-                    } else {
-                        $s_excludes = $definition->info[$tokens[$i]->name]->excludes;
-                    }
-                    if ($s_excludes) {
-                        array_pop($exclude_stack);
-                    }
-                }
-                $i++;
-            }
-
-        }
-
-        //####################################################################//
-        // Post-processing
-
-        // remove implicit parent tokens at the beginning and end
-        array_shift($tokens);
-        array_pop($tokens);
-
-        // remove context variables
-        $context->destroy('IsInline');
-        $context->destroy('CurrentToken');
-
-        //####################################################################//
-        // Return
-
-        return $tokens;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token.php b/library/HTMLPurifier/Token.php
deleted file mode 100644
index 7900e6cb10..0000000000
--- a/library/HTMLPurifier/Token.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-
-/**
- * Abstract base token class that all others inherit from.
- */
-class HTMLPurifier_Token {
-    public $line; /**< Line number node was on in source document. Null if unknown. */
-    public $col;  /**< Column of line node was on in source document. Null if unknown. */
-
-    /**
-     * Lookup array of processing that this token is exempt from.
-     * Currently, valid values are "ValidateAttributes" and
-     * "MakeWellFormed_TagClosedError"
-     */
-    public $armor = array();
-
-    /**
-     * Used during MakeWellFormed.
-     */
-    public $skip;
-    public $rewind;
-    public $carryover;
-
-    public function __get($n) {
-      if ($n === 'type') {
-        trigger_error('Deprecated type property called; use instanceof', E_USER_NOTICE);
-        switch (get_class($this)) {
-          case 'HTMLPurifier_Token_Start':      return 'start';
-          case 'HTMLPurifier_Token_Empty':      return 'empty';
-          case 'HTMLPurifier_Token_End':        return 'end';
-          case 'HTMLPurifier_Token_Text':       return 'text';
-          case 'HTMLPurifier_Token_Comment':    return 'comment';
-          default: return null;
-        }
-      }
-    }
-
-    /**
-     * Sets the position of the token in the source document.
-     */
-    public function position($l = null, $c = null) {
-        $this->line = $l;
-        $this->col  = $c;
-    }
-
-    /**
-     * Convenience function for DirectLex settings line/col position.
-     */
-    public function rawPosition($l, $c) {
-        if ($c === -1) $l++;
-        $this->line = $l;
-        $this->col  = $c;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token/Comment.php b/library/HTMLPurifier/Token/Comment.php
deleted file mode 100644
index dc6bdcabb8..0000000000
--- a/library/HTMLPurifier/Token/Comment.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * Concrete comment token class. Generally will be ignored.
- */
-class HTMLPurifier_Token_Comment extends HTMLPurifier_Token
-{
-    public $data; /**< Character data within comment. */
-    public $is_whitespace = true;
-    /**
-     * Transparent constructor.
-     *
-     * @param $data String comment data.
-     */
-    public function __construct($data, $line = null, $col = null) {
-        $this->data = $data;
-        $this->line = $line;
-        $this->col  = $col;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/TokenFactory.php b/library/HTMLPurifier/TokenFactory.php
deleted file mode 100644
index 7cf48fb41c..0000000000
--- a/library/HTMLPurifier/TokenFactory.php
+++ /dev/null
@@ -1,94 +0,0 @@
-<?php
-
-/**
- * Factory for token generation.
- *
- * @note Doing some benchmarking indicates that the new operator is much
- *       slower than the clone operator (even discounting the cost of the
- *       constructor).  This class is for that optimization.
- *       Other then that, there's not much point as we don't
- *       maintain parallel HTMLPurifier_Token hierarchies (the main reason why
- *       you'd want to use an abstract factory).
- * @todo Port DirectLex to use this
- */
-class HTMLPurifier_TokenFactory
-{
-
-    /**
-     * Prototypes that will be cloned.
-     * @private
-     */
-    // p stands for prototype
-    private $p_start, $p_end, $p_empty, $p_text, $p_comment;
-
-    /**
-     * Generates blank prototypes for cloning.
-     */
-    public function __construct() {
-        $this->p_start  = new HTMLPurifier_Token_Start('', array());
-        $this->p_end    = new HTMLPurifier_Token_End('');
-        $this->p_empty  = new HTMLPurifier_Token_Empty('', array());
-        $this->p_text   = new HTMLPurifier_Token_Text('');
-        $this->p_comment= new HTMLPurifier_Token_Comment('');
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Start.
-     * @param $name Tag name
-     * @param $attr Associative array of attributes
-     * @return Generated HTMLPurifier_Token_Start
-     */
-    public function createStart($name, $attr = array()) {
-        $p = clone $this->p_start;
-        $p->__construct($name, $attr);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_End.
-     * @param $name Tag name
-     * @return Generated HTMLPurifier_Token_End
-     */
-    public function createEnd($name) {
-        $p = clone $this->p_end;
-        $p->__construct($name);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Empty.
-     * @param $name Tag name
-     * @param $attr Associative array of attributes
-     * @return Generated HTMLPurifier_Token_Empty
-     */
-    public function createEmpty($name, $attr = array()) {
-        $p = clone $this->p_empty;
-        $p->__construct($name, $attr);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Text.
-     * @param $data Data of text token
-     * @return Generated HTMLPurifier_Token_Text
-     */
-    public function createText($data) {
-        $p = clone $this->p_text;
-        $p->__construct($data);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Comment.
-     * @param $data Data of comment token
-     * @return Generated HTMLPurifier_Token_Comment
-     */
-    public function createComment($data) {
-        $p = clone $this->p_comment;
-        $p->__construct($data);
-        return $p;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URI.php b/library/HTMLPurifier/URI.php
deleted file mode 100644
index 8b50d0d18d..0000000000
--- a/library/HTMLPurifier/URI.php
+++ /dev/null
@@ -1,173 +0,0 @@
-<?php
-
-/**
- * HTML Purifier's internal representation of a URI.
- * @note
- *      Internal data-structures are completely escaped. If the data needs
- *      to be used in a non-URI context (which is very unlikely), be sure
- *      to decode it first. The URI may not necessarily be well-formed until
- *      validate() is called.
- */
-class HTMLPurifier_URI
-{
-
-    public $scheme, $userinfo, $host, $port, $path, $query, $fragment;
-
-    /**
-     * @note Automatically normalizes scheme and port
-     */
-    public function __construct($scheme, $userinfo, $host, $port, $path, $query, $fragment) {
-        $this->scheme = is_null($scheme) || ctype_lower($scheme) ? $scheme : strtolower($scheme);
-        $this->userinfo = $userinfo;
-        $this->host = $host;
-        $this->port = is_null($port) ? $port : (int) $port;
-        $this->path = $path;
-        $this->query = $query;
-        $this->fragment = $fragment;
-    }
-
-    /**
-     * Retrieves a scheme object corresponding to the URI's scheme/default
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Scheme object appropriate for validating this URI
-     */
-    public function getSchemeObj($config, $context) {
-        $registry = HTMLPurifier_URISchemeRegistry::instance();
-        if ($this->scheme !== null) {
-            $scheme_obj = $registry->getScheme($this->scheme, $config, $context);
-            if (!$scheme_obj) return false; // invalid scheme, clean it out
-        } else {
-            // no scheme: retrieve the default one
-            $def = $config->getDefinition('URI');
-            $scheme_obj = $registry->getScheme($def->defaultScheme, $config, $context);
-            if (!$scheme_obj) {
-                // something funky happened to the default scheme object
-                trigger_error(
-                    'Default scheme object "' . $def->defaultScheme . '" was not readable',
-                    E_USER_WARNING
-                );
-                return false;
-            }
-        }
-        return $scheme_obj;
-    }
-
-    /**
-     * Generic validation method applicable for all schemes. May modify
-     * this URI in order to get it into a compliant form.
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return True if validation/filtering succeeds, false if failure
-     */
-    public function validate($config, $context) {
-
-        // ABNF definitions from RFC 3986
-        $chars_sub_delims = '!$&\'()*+,;=';
-        $chars_gen_delims = ':/?#[]@';
-        $chars_pchar = $chars_sub_delims . ':@';
-
-        // validate scheme (MUST BE FIRST!)
-        if (!is_null($this->scheme) && is_null($this->host)) {
-            $def = $config->getDefinition('URI');
-            if ($def->defaultScheme === $this->scheme) {
-                $this->scheme = null;
-            }
-        }
-
-        // validate host
-        if (!is_null($this->host)) {
-            $host_def = new HTMLPurifier_AttrDef_URI_Host();
-            $this->host = $host_def->validate($this->host, $config, $context);
-            if ($this->host === false) $this->host = null;
-        }
-
-        // validate username
-        if (!is_null($this->userinfo)) {
-            $encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . ':');
-            $this->userinfo = $encoder->encode($this->userinfo);
-        }
-
-        // validate port
-        if (!is_null($this->port)) {
-            if ($this->port < 1 || $this->port > 65535) $this->port = null;
-        }
-
-        // validate path
-        $path_parts = array();
-        $segments_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/');
-        if (!is_null($this->host)) {
-            // path-abempty (hier and relative)
-            $this->path = $segments_encoder->encode($this->path);
-        } elseif ($this->path !== '' && $this->path[0] === '/') {
-            // path-absolute (hier and relative)
-            if (strlen($this->path) >= 2 && $this->path[1] === '/') {
-                // This shouldn't ever happen!
-                $this->path = '';
-            } else {
-                $this->path = $segments_encoder->encode($this->path);
-            }
-        } elseif (!is_null($this->scheme) && $this->path !== '') {
-            // path-rootless (hier)
-            // Short circuit evaluation means we don't need to check nz
-            $this->path = $segments_encoder->encode($this->path);
-        } elseif (is_null($this->scheme) && $this->path !== '') {
-            // path-noscheme (relative)
-            // (once again, not checking nz)
-            $segment_nc_encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . '@');
-            $c = strpos($this->path, '/');
-            if ($c !== false) {
-                $this->path =
-                    $segment_nc_encoder->encode(substr($this->path, 0, $c)) .
-                    $segments_encoder->encode(substr($this->path, $c));
-            } else {
-                $this->path = $segment_nc_encoder->encode($this->path);
-            }
-        } else {
-            // path-empty (hier and relative)
-            $this->path = ''; // just to be safe
-        }
-
-        // qf = query and fragment
-        $qf_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/?');
-
-        if (!is_null($this->query)) {
-            $this->query = $qf_encoder->encode($this->query);
-        }
-
-        if (!is_null($this->fragment)) {
-            $this->fragment = $qf_encoder->encode($this->fragment);
-        }
-
-        return true;
-
-    }
-
-    /**
-     * Convert URI back to string
-     * @return String URI appropriate for output
-     */
-    public function toString() {
-        // reconstruct authority
-        $authority = null;
-        if (!is_null($this->host)) {
-            $authority = '';
-            if(!is_null($this->userinfo)) $authority .= $this->userinfo . '@';
-            $authority .= $this->host;
-            if(!is_null($this->port))     $authority .= ':' . $this->port;
-        }
-
-        // reconstruct the result
-        $result = '';
-        if (!is_null($this->scheme))    $result .= $this->scheme . ':';
-        if (!is_null($authority))       $result .=  '//' . $authority;
-        $result .= $this->path;
-        if (!is_null($this->query))     $result .= '?' . $this->query;
-        if (!is_null($this->fragment))  $result .= '#' . $this->fragment;
-
-        return $result;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter.php b/library/HTMLPurifier/URIFilter.php
deleted file mode 100644
index c116f93dff..0000000000
--- a/library/HTMLPurifier/URIFilter.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-/**
- * Chainable filters for custom URI processing.
- *
- * These filters can perform custom actions on a URI filter object,
- * including transformation or blacklisting.
- *
- * @warning This filter is called before scheme object validation occurs.
- *          Make sure, if you require a specific scheme object, you
- *          you check that it exists. This allows filters to convert
- *          proprietary URI schemes into regular ones.
- */
-abstract class HTMLPurifier_URIFilter
-{
-
-    /**
-     * Unique identifier of filter
-     */
-    public $name;
-
-    /**
-     * True if this filter should be run after scheme validation.
-     */
-    public $post = false;
-
-    /**
-     * Performs initialization for the filter
-     */
-    public function prepare($config) {return true;}
-
-    /**
-     * Filter a URI object
-     * @param $uri Reference to URI object variable
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return bool Whether or not to continue processing: false indicates
-     *         URL is no good, true indicates continue processing. Note that
-     *         all changes are committed directly on the URI object
-     */
-    abstract public function filter(&$uri, $config, $context);
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter/DisableExternal.php b/library/HTMLPurifier/URIFilter/DisableExternal.php
deleted file mode 100644
index d8a39a5011..0000000000
--- a/library/HTMLPurifier/URIFilter/DisableExternal.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
-{
-    public $name = 'DisableExternal';
-    protected $ourHostParts = false;
-    public function prepare($config) {
-        $our_host = $config->getDefinition('URI')->host;
-        if ($our_host !== null) $this->ourHostParts = array_reverse(explode('.', $our_host));
-    }
-    public function filter(&$uri, $config, $context) {
-        if (is_null($uri->host)) return true;
-        if ($this->ourHostParts === false) return false;
-        $host_parts = array_reverse(explode('.', $uri->host));
-        foreach ($this->ourHostParts as $i => $x) {
-            if (!isset($host_parts[$i])) return false;
-            if ($host_parts[$i] != $this->ourHostParts[$i]) return false;
-        }
-        return true;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter/DisableExternalResources.php b/library/HTMLPurifier/URIFilter/DisableExternalResources.php
deleted file mode 100644
index 881abc43cf..0000000000
--- a/library/HTMLPurifier/URIFilter/DisableExternalResources.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_DisableExternalResources extends HTMLPurifier_URIFilter_DisableExternal
-{
-    public $name = 'DisableExternalResources';
-    public function filter(&$uri, $config, $context) {
-        if (!$context->get('EmbeddedURI', true)) return true;
-        return parent::filter($uri, $config, $context);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter/HostBlacklist.php b/library/HTMLPurifier/URIFilter/HostBlacklist.php
deleted file mode 100644
index 045aa0992c..0000000000
--- a/library/HTMLPurifier/URIFilter/HostBlacklist.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_HostBlacklist extends HTMLPurifier_URIFilter
-{
-    public $name = 'HostBlacklist';
-    protected $blacklist = array();
-    public function prepare($config) {
-        $this->blacklist = $config->get('URI.HostBlacklist');
-        return true;
-    }
-    public function filter(&$uri, $config, $context) {
-        foreach($this->blacklist as $blacklisted_host_fragment) {
-            if (strpos($uri->host, $blacklisted_host_fragment) !== false) {
-                return false;
-            }
-        }
-        return true;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter/Munge.php b/library/HTMLPurifier/URIFilter/Munge.php
deleted file mode 100644
index efa10a6458..0000000000
--- a/library/HTMLPurifier/URIFilter/Munge.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_Munge extends HTMLPurifier_URIFilter
-{
-    public $name = 'Munge';
-    public $post = true;
-    private $target, $parser, $doEmbed, $secretKey;
-
-    protected $replace = array();
-
-    public function prepare($config) {
-        $this->target    = $config->get('URI.' . $this->name);
-        $this->parser    = new HTMLPurifier_URIParser();
-        $this->doEmbed   = $config->get('URI.MungeResources');
-        $this->secretKey = $config->get('URI.MungeSecretKey');
-        return true;
-    }
-    public function filter(&$uri, $config, $context) {
-        if ($context->get('EmbeddedURI', true) && !$this->doEmbed) return true;
-
-        $scheme_obj = $uri->getSchemeObj($config, $context);
-        if (!$scheme_obj) return true; // ignore unknown schemes, maybe another postfilter did it
-        if (is_null($uri->host) || empty($scheme_obj->browsable)) {
-            return true;
-        }
-        // don't redirect if target host is our host
-        if ($uri->host === $config->getDefinition('URI')->host) {
-            return true;
-        }
-
-        $this->makeReplace($uri, $config, $context);
-        $this->replace = array_map('rawurlencode', $this->replace);
-
-        $new_uri = strtr($this->target, $this->replace);
-        $new_uri = $this->parser->parse($new_uri);
-        // don't redirect if the target host is the same as the
-        // starting host
-        if ($uri->host === $new_uri->host) return true;
-        $uri = $new_uri; // overwrite
-        return true;
-    }
-
-    protected function makeReplace($uri, $config, $context) {
-        $string = $uri->toString();
-        // always available
-        $this->replace['%s'] = $string;
-        $this->replace['%r'] = $context->get('EmbeddedURI', true);
-        $token = $context->get('CurrentToken', true);
-        $this->replace['%n'] = $token ? $token->name : null;
-        $this->replace['%m'] = $context->get('CurrentAttr', true);
-        $this->replace['%p'] = $context->get('CurrentCSSProperty', true);
-        // not always available
-        if ($this->secretKey) $this->replace['%t'] = sha1($this->secretKey . ':' . $string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme.php b/library/HTMLPurifier/URIScheme.php
deleted file mode 100644
index 039710fd15..0000000000
--- a/library/HTMLPurifier/URIScheme.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/**
- * Validator for the components of a URI for a specific scheme
- */
-class HTMLPurifier_URIScheme
-{
-
-    /**
-     * Scheme's default port (integer)
-     */
-    public $default_port = null;
-
-    /**
-     * Whether or not URIs of this schem are locatable by a browser
-     * http and ftp are accessible, while mailto and news are not.
-     */
-    public $browsable = false;
-
-    /**
-     * Whether or not the URI always uses <hier_part>, resolves edge cases
-     * with making relative URIs absolute
-     */
-    public $hierarchical = false;
-
-    /**
-     * Validates the components of a URI
-     * @note This implementation should be called by children if they define
-     *       a default port, as it does port processing.
-     * @param $uri Instance of HTMLPurifier_URI
-     * @param $config HTMLPurifier_Config object
-     * @param $context HTMLPurifier_Context object
-     * @return Bool success or failure
-     */
-    public function validate(&$uri, $config, $context) {
-        if ($this->default_port == $uri->port) $uri->port = null;
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/news.php b/library/HTMLPurifier/URIScheme/news.php
deleted file mode 100644
index f5f54f4f56..0000000000
--- a/library/HTMLPurifier/URIScheme/news.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * Validates news (Usenet) as defined by generic RFC 1738
- */
-class HTMLPurifier_URIScheme_news extends HTMLPurifier_URIScheme {
-
-    public $browsable = false;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        $uri->host     = null;
-        $uri->port     = null;
-        $uri->query    = null;
-        // typecode check needed on path
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/nntp.php b/library/HTMLPurifier/URIScheme/nntp.php
deleted file mode 100644
index 5bf93ea784..0000000000
--- a/library/HTMLPurifier/URIScheme/nntp.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-
-/**
- * Validates nntp (Network News Transfer Protocol) as defined by generic RFC 1738
- */
-class HTMLPurifier_URIScheme_nntp extends HTMLPurifier_URIScheme {
-
-    public $default_port = 119;
-    public $browsable = false;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        $uri->query    = null;
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/VarParser.php b/library/HTMLPurifier/VarParser.php
deleted file mode 100644
index 68e72ae869..0000000000
--- a/library/HTMLPurifier/VarParser.php
+++ /dev/null
@@ -1,154 +0,0 @@
-<?php
-
-/**
- * Parses string representations into their corresponding native PHP
- * variable type. The base implementation does a simple type-check.
- */
-class HTMLPurifier_VarParser
-{
-
-    const STRING    = 1;
-    const ISTRING   = 2;
-    const TEXT      = 3;
-    const ITEXT     = 4;
-    const INT       = 5;
-    const FLOAT     = 6;
-    const BOOL      = 7;
-    const LOOKUP    = 8;
-    const ALIST     = 9;
-    const HASH      = 10;
-    const MIXED     = 11;
-
-    /**
-     * Lookup table of allowed types. Mainly for backwards compatibility, but
-     * also convenient for transforming string type names to the integer constants.
-     */
-    static public $types = array(
-        'string'    => self::STRING,
-        'istring'   => self::ISTRING,
-        'text'      => self::TEXT,
-        'itext'     => self::ITEXT,
-        'int'       => self::INT,
-        'float'     => self::FLOAT,
-        'bool'      => self::BOOL,
-        'lookup'    => self::LOOKUP,
-        'list'      => self::ALIST,
-        'hash'      => self::HASH,
-        'mixed'     => self::MIXED
-    );
-
-    /**
-     * Lookup table of types that are string, and can have aliases or
-     * allowed value lists.
-     */
-    static public $stringTypes = array(
-        self::STRING    => true,
-        self::ISTRING   => true,
-        self::TEXT      => true,
-        self::ITEXT     => true,
-    );
-
-    /**
-     * Validate a variable according to type. Throws
-     * HTMLPurifier_VarParserException if invalid.
-     * It may return NULL as a valid type if $allow_null is true.
-     *
-     * @param $var Variable to validate
-     * @param $type Type of variable, see HTMLPurifier_VarParser->types
-     * @param $allow_null Whether or not to permit null as a value
-     * @return Validated and type-coerced variable
-     */
-    final public function parse($var, $type, $allow_null = false) {
-        if (is_string($type)) {
-            if (!isset(HTMLPurifier_VarParser::$types[$type])) {
-                throw new HTMLPurifier_VarParserException("Invalid type '$type'");
-            } else {
-                $type = HTMLPurifier_VarParser::$types[$type];
-            }
-        }
-        $var = $this->parseImplementation($var, $type, $allow_null);
-        if ($allow_null && $var === null) return null;
-        // These are basic checks, to make sure nothing horribly wrong
-        // happened in our implementations.
-        switch ($type) {
-            case (self::STRING):
-            case (self::ISTRING):
-            case (self::TEXT):
-            case (self::ITEXT):
-                if (!is_string($var)) break;
-                if ($type == self::ISTRING || $type == self::ITEXT) $var = strtolower($var);
-                return $var;
-            case (self::INT):
-                if (!is_int($var)) break;
-                return $var;
-            case (self::FLOAT):
-                if (!is_float($var)) break;
-                return $var;
-            case (self::BOOL):
-                if (!is_bool($var)) break;
-                return $var;
-            case (self::LOOKUP):
-            case (self::ALIST):
-            case (self::HASH):
-                if (!is_array($var)) break;
-                if ($type === self::LOOKUP) {
-                    foreach ($var as $k) if ($k !== true) $this->error('Lookup table contains value other than true');
-                } elseif ($type === self::ALIST) {
-                    $keys = array_keys($var);
-                    if (array_keys($keys) !== $keys) $this->error('Indices for list are not uniform');
-                }
-                return $var;
-            case (self::MIXED):
-                return $var;
-            default:
-                $this->errorInconsistent(get_class($this), $type);
-        }
-        $this->errorGeneric($var, $type);
-    }
-
-    /**
-     * Actually implements the parsing. Base implementation is to not
-     * do anything to $var. Subclasses should overload this!
-     */
-    protected function parseImplementation($var, $type, $allow_null) {
-        return $var;
-    }
-
-    /**
-     * Throws an exception.
-     */
-    protected function error($msg) {
-        throw new HTMLPurifier_VarParserException($msg);
-    }
-
-    /**
-     * Throws an inconsistency exception.
-     * @note This should not ever be called. It would be called if we
-     *       extend the allowed values of HTMLPurifier_VarParser without
-     *       updating subclasses.
-     */
-    protected function errorInconsistent($class, $type) {
-        throw new HTMLPurifier_Exception("Inconsistency in $class: ".HTMLPurifier_VarParser::getTypeName($type)." not implemented");
-    }
-
-    /**
-     * Generic error for if a type didn't work.
-     */
-    protected function errorGeneric($var, $type) {
-        $vtype = gettype($var);
-        $this->error("Expected type ".HTMLPurifier_VarParser::getTypeName($type).", got $vtype");
-    }
-
-    static public function getTypeName($type) {
-        static $lookup;
-        if (!$lookup) {
-            // Lazy load the alternative lookup table
-            $lookup = array_flip(HTMLPurifier_VarParser::$types);
-        }
-        if (!isset($lookup[$type])) return 'unknown';
-        return $lookup[$type];
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/CREDITS b/library/ezyang/htmlpurifier/CREDITS
new file mode 100644
index 0000000000..7921b45af7
--- /dev/null
+++ b/library/ezyang/htmlpurifier/CREDITS
@@ -0,0 +1,9 @@
+
+CREDITS
+
+Almost everything written by Edward Z. Yang (Ambush Commander).  Lots of thanks
+to the DevNetwork Community for their help (see docs/ref-devnetwork.html for
+more details), Feyd especially (namely IPv6 and optimization).  Thanks to RSnake
+for letting me package his fantastic XSS cheatsheet for a smoketest.
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/INSTALL b/library/ezyang/htmlpurifier/INSTALL
new file mode 100644
index 0000000000..677c04aa04
--- /dev/null
+++ b/library/ezyang/htmlpurifier/INSTALL
@@ -0,0 +1,374 @@
+
+Install
+    How to install HTML Purifier
+
+HTML Purifier is designed to run out of the box, so actually using the
+library is extremely easy.  (Although... if you were looking for a
+step-by-step installation GUI, you've downloaded the wrong software!)
+
+While the impatient can get going immediately with some of the sample
+code at the bottom of this library, it's well worth reading this entire
+document--most of the other documentation assumes that you are familiar
+with these contents.
+
+
+---------------------------------------------------------------------------
+1.  Compatibility
+
+HTML Purifier is PHP 5 only, and is actively tested from PHP 5.0.5 and
+up. It has no core dependencies with other libraries. PHP
+4 support was deprecated on December 31, 2007 with HTML Purifier 3.0.0.
+HTML Purifier is not compatible with zend.ze1_compatibility_mode.
+
+These optional extensions can enhance the capabilities of HTML Purifier:
+
+    * iconv  : Converts text to and from non-UTF-8 encodings
+    * bcmath : Used for unit conversion and imagecrash protection
+    * tidy   : Used for pretty-printing HTML
+
+These optional libraries can enhance the capabilities of HTML Purifier:
+
+    * CSSTidy : Clean CSS stylesheets using %Core.ExtractStyleBlocks
+    * Net_IDNA2 (PEAR) : IRI support using %Core.EnableIDNA
+
+---------------------------------------------------------------------------
+2.  Reconnaissance
+
+A big plus of HTML Purifier is its inerrant support of standards, so
+your web-pages should be standards-compliant.  (They should also use
+semantic markup, but that's another issue altogether, one HTML Purifier
+cannot fix without reading your mind.)
+
+HTML Purifier can process these doctypes:
+
+* XHTML 1.0 Transitional (default)
+* XHTML 1.0 Strict
+* HTML 4.01 Transitional
+* HTML 4.01 Strict
+* XHTML 1.1
+
+...and these character encodings:
+
+* UTF-8 (default)
+* Any encoding iconv supports (with crippled internationalization support)
+
+These defaults reflect what my choices would be if I were authoring an
+HTML document, however, what you choose depends on the nature of your
+codebase.  If you don't know what doctype you are using, you can determine
+the doctype from this identifier at the top of your source code:
+
+    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+...and the character encoding from this code:
+
+    <meta http-equiv="Content-type" content="text/html;charset=ENCODING">
+
+If the character encoding declaration is missing, STOP NOW, and
+read 'docs/enduser-utf8.html' (web accessible at
+http://htmlpurifier.org/docs/enduser-utf8.html).  In fact, even if it is
+present, read this document anyway, as many websites specify their
+document's character encoding incorrectly.
+
+
+---------------------------------------------------------------------------
+3.  Including the library
+
+The procedure is quite simple:
+
+    require_once '/path/to/library/HTMLPurifier.auto.php';
+
+This will setup an autoloader, so the library's files are only included
+when you use them.
+
+Only the contents in the library/ folder are necessary, so you can remove
+everything else when using HTML Purifier in a production environment.
+
+If you installed HTML Purifier via PEAR, all you need to do is:
+
+    require_once 'HTMLPurifier.auto.php';
+
+Please note that the usual PEAR practice of including just the classes you
+want will not work with HTML Purifier's autoloading scheme.
+
+Advanced users, read on; other users can skip to section 4.
+
+Autoload compatibility
+----------------------
+
+    HTML Purifier attempts to be as smart as possible when registering an
+    autoloader, but there are some cases where you will need to change
+    your own code to accomodate HTML Purifier. These are those cases:
+
+    PHP VERSION IS LESS THAN 5.1.2, AND YOU'VE DEFINED __autoload
+        Because spl_autoload_register() doesn't exist in early versions
+        of PHP 5, HTML Purifier has no way of adding itself to the autoload
+        stack. Modify your __autoload function to test
+        HTMLPurifier_Bootstrap::autoload($class)
+
+        For example, suppose your autoload function looks like this:
+
+            function __autoload($class) {
+                require str_replace('_', '/', $class) . '.php';
+                return true;
+            }
+
+        A modified version with HTML Purifier would look like this:
+
+            function __autoload($class) {
+                if (HTMLPurifier_Bootstrap::autoload($class)) return true;
+                require str_replace('_', '/', $class) . '.php';
+                return true;
+            }
+
+        Note that there *is* some custom behavior in our autoloader; the
+        original autoloader in our example would work for 99% of the time,
+        but would fail when including language files.
+
+    AN __autoload FUNCTION IS DECLARED AFTER OUR AUTOLOADER IS REGISTERED
+        spl_autoload_register() has the curious behavior of disabling
+        the existing __autoload() handler. Users need to explicitly
+        spl_autoload_register('__autoload'). Because we use SPL when it
+        is available, __autoload() will ALWAYS be disabled. If __autoload()
+        is declared before HTML Purifier is loaded, this is not a problem:
+        HTML Purifier will register the function for you. But if it is
+        declared afterwards, it will mysteriously not work. This
+        snippet of code (after your autoloader is defined) will fix it:
+
+            spl_autoload_register('__autoload')
+
+    Users should also be on guard if they use a version of PHP previous
+    to 5.1.2 without an autoloader--HTML Purifier will define __autoload()
+    for you, which can collide with an autoloader that was added by *you*
+    later.
+
+
+For better performance
+----------------------
+
+    Opcode caches, which greatly speed up PHP initialization for scripts
+    with large amounts of code (HTML Purifier included), don't like
+    autoloaders. We offer an include file that includes all of HTML Purifier's
+    files in one go in an opcode cache friendly manner:
+
+        // If /path/to/library isn't already in your include path, uncomment
+        // the below line:
+        // require '/path/to/library/HTMLPurifier.path.php';
+
+        require 'HTMLPurifier.includes.php';
+
+    Optional components still need to be included--you'll know if you try to
+    use a feature and you get a class doesn't exists error! The autoloader
+    can be used in conjunction with this approach to catch classes that are
+    missing. Simply add this afterwards:
+
+        require 'HTMLPurifier.autoload.php';
+
+Standalone version
+------------------
+
+    HTML Purifier has a standalone distribution; you can also generate
+    a standalone file from the full version by running the script
+    maintenance/generate-standalone.php . The standalone version has the
+    benefit of having most of its code in one file, so parsing is much
+    faster and the library is easier to manage.
+
+    If HTMLPurifier.standalone.php exists in the library directory, you
+    can use it like this:
+
+        require '/path/to/HTMLPurifier.standalone.php';
+
+    This is equivalent to including HTMLPurifier.includes.php, except that
+    the contents of standalone/ will be added to your path. To override this
+    behavior, specify a new HTMLPURIFIER_PREFIX where standalone files can
+    be found (usually, this will be one directory up, the "true" library
+    directory in full distributions). Don't forget to set your path too!
+
+    The autoloader can be added to the end to ensure the classes are
+    loaded when necessary; otherwise you can manually include them.
+    To use the autoloader, use this:
+
+        require 'HTMLPurifier.autoload.php';
+
+For advanced users
+------------------
+
+    HTMLPurifier.auto.php performs a number of operations that can be done
+    individually. These are:
+
+        HTMLPurifier.path.php
+            Puts /path/to/library in the include path. For high performance,
+            this should be done in php.ini.
+
+        HTMLPurifier.autoload.php
+            Registers our autoload handler HTMLPurifier_Bootstrap::autoload($class).
+
+    You can do these operations by yourself--in fact, you must modify your own
+    autoload handler if you are using a version of PHP earlier than PHP 5.1.2
+    (See "Autoload compatibility" above).
+
+
+---------------------------------------------------------------------------
+4. Configuration
+
+HTML Purifier is designed to run out-of-the-box, but occasionally HTML
+Purifier needs to be told what to do.  If you answer no to any of these
+questions, read on; otherwise, you can skip to the next section (or, if you're
+into configuring things just for the heck of it, skip to 4.3).
+
+* Am I using UTF-8?
+* Am I using XHTML 1.0 Transitional?
+
+If you answered no to any of these questions, instantiate a configuration
+object and read on:
+
+    $config = HTMLPurifier_Config::createDefault();
+
+
+4.1. Setting a different character encoding
+
+You really shouldn't use any other encoding except UTF-8, especially if you
+plan to support multilingual websites (read section three for more details).
+However, switching to UTF-8 is not always immediately feasible, so we can
+adapt.
+
+HTML Purifier uses iconv to support other character encodings, as such,
+any encoding that iconv supports <http://www.gnu.org/software/libiconv/>
+HTML Purifier supports with this code:
+
+    $config->set('Core.Encoding', /* put your encoding here */);
+
+An example usage for Latin-1 websites (the most common encoding for English
+websites):
+
+    $config->set('Core.Encoding', 'ISO-8859-1');
+
+Note that HTML Purifier's support for non-Unicode encodings is crippled by the
+fact that any character not supported by that encoding will be silently
+dropped, EVEN if it is ampersand escaped.  If you want to work around
+this, you are welcome to read docs/enduser-utf8.html for a fix,
+but please be cognizant of the issues the "solution" creates (for this
+reason, I do not include the solution in this document).
+
+
+4.2. Setting a different doctype
+
+For those of you using HTML 4.01 Transitional, you can disable
+XHTML output like this:
+
+    $config->set('HTML.Doctype', 'HTML 4.01 Transitional');
+
+Other supported doctypes include:
+
+    * HTML 4.01 Strict
+    * HTML 4.01 Transitional
+    * XHTML 1.0 Strict
+    * XHTML 1.0 Transitional
+    * XHTML 1.1
+
+
+4.3. Other settings
+
+There are more configuration directives which can be read about
+here: <http://htmlpurifier.org/live/configdoc/plain.html>  They're a bit boring,
+but they can help out for those of you who like to exert maximum control over
+your code.  Some of the more interesting ones are configurable at the
+demo <http://htmlpurifier.org/demo.php> and are well worth looking into
+for your own system.
+
+For example, you can fine tune allowed elements and attributes, convert
+relative URLs to absolute ones, and even autoparagraph input text! These
+are, respectively, %HTML.Allowed, %URI.MakeAbsolute and %URI.Base, and
+%AutoFormat.AutoParagraph. The %Namespace.Directive naming convention
+translates to:
+
+    $config->set('Namespace.Directive', $value);
+
+E.g.
+
+    $config->set('HTML.Allowed', 'p,b,a[href],i');
+    $config->set('URI.Base', 'http://www.example.com');
+    $config->set('URI.MakeAbsolute', true);
+    $config->set('AutoFormat.AutoParagraph', true);
+
+
+---------------------------------------------------------------------------
+5. Caching
+
+HTML Purifier generates some cache files (generally one or two) to speed up
+its execution. For maximum performance, make sure that
+library/HTMLPurifier/DefinitionCache/Serializer is writeable by the webserver.
+
+If you are in the library/ folder of HTML Purifier, you can set the
+appropriate permissions using:
+
+    chmod -R 0755 HTMLPurifier/DefinitionCache/Serializer
+
+If the above command doesn't work, you may need to assign write permissions
+to all. This may be necessary if your webserver runs as nobody, but is
+not recommended since it means any other user can write files in the
+directory. Use:
+
+    chmod -R 0777 HTMLPurifier/DefinitionCache/Serializer
+
+You can also chmod files via your FTP client; this option
+is usually accessible by right clicking the corresponding directory and
+then selecting "chmod" or "file permissions".
+
+Starting with 2.0.1, HTML Purifier will generate friendly error messages
+that will tell you exactly what you have to chmod the directory to, if in doubt,
+follow its advice.
+
+If you are unable or unwilling to give write permissions to the cache
+directory, you can either disable the cache (and suffer a performance
+hit):
+
+    $config->set('Core.DefinitionCache', null);
+
+Or move the cache directory somewhere else (no trailing slash):
+
+    $config->set('Cache.SerializerPath', '/home/user/absolute/path');
+
+
+---------------------------------------------------------------------------
+6.   Using the code
+
+The interface is mind-numbingly simple:
+
+    $purifier = new HTMLPurifier($config);
+    $clean_html = $purifier->purify( $dirty_html );
+
+That's it!  For more examples, check out docs/examples/ (they aren't very
+different though).  Also, docs/enduser-slow.html gives advice on what to
+do if HTML Purifier is slowing down your application.
+
+
+---------------------------------------------------------------------------
+7.   Quick install
+
+First, make sure library/HTMLPurifier/DefinitionCache/Serializer is
+writable by the webserver (see Section 5: Caching above for details).
+If your website is in UTF-8 and XHTML Transitional, use this code:
+
+<?php
+    require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';
+
+    $config = HTMLPurifier_Config::createDefault();
+    $purifier = new HTMLPurifier($config);
+    $clean_html = $purifier->purify($dirty_html);
+?>
+
+If your website is in a different encoding or doctype, use this code:
+
+<?php
+    require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';
+
+    $config = HTMLPurifier_Config::createDefault();
+    $config->set('Core.Encoding', 'ISO-8859-1'); // replace with your encoding
+    $config->set('HTML.Doctype', 'HTML 4.01 Transitional'); // replace with your doctype
+    $purifier = new HTMLPurifier($config);
+
+    $clean_html = $purifier->purify($dirty_html);
+?>
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/INSTALL.fr.utf8 b/library/ezyang/htmlpurifier/INSTALL.fr.utf8
new file mode 100644
index 0000000000..06e628cc96
--- /dev/null
+++ b/library/ezyang/htmlpurifier/INSTALL.fr.utf8
@@ -0,0 +1,60 @@
+
+Installation
+    Comment installer HTML Purifier
+
+Attention : Ce document est encodé en UTF-8, si les lettres avec des accents
+ne s'affichent pas, prenez un meilleur éditeur de texte.
+
+L'installation de HTML Purifier est très simple, parce qu'il n'a pas besoin
+de configuration. Pour les utilisateurs impatients, le code se trouve dans le
+pied de page, mais je recommande de lire le document.
+
+1.  Compatibilité
+
+HTML Purifier fonctionne avec PHP 5. PHP 5.0.5 est la dernière version testée.
+Il ne dépend pas d'autres librairies.
+
+Les extensions optionnelles sont iconv (généralement déjà installée) et tidy
+(répendue aussi). Si vous utilisez UTF-8 et que vous ne voulez pas l'indentation,
+vous pouvez utiliser HTML Purifier sans ces extensions.
+
+
+2.  Inclure la librairie
+
+Quand vous devez l'utilisez, incluez le :
+
+    require_once('/path/to/library/HTMLPurifier.auto.php');
+
+Ne pas l'inclure si ce n'est pas nécessaire, car HTML Purifier est lourd.
+
+HTML Purifier utilise "autoload". Si vous avez défini la fonction __autoload,
+vous devez ajouter cette fonction :
+
+    spl_autoload_register('__autoload')
+
+Plus d'informations dans le document "INSTALL".
+
+3.  Installation rapide
+
+Si votre site Web est en UTF-8 et XHTML Transitional, utilisez :
+
+<?php
+    require_once('/path/to/htmlpurifier/library/HTMLPurifier.auto.php');
+    $purificateur = new HTMLPurifier();
+    $html_propre = $purificateur->purify($html_a_purifier);
+?>
+
+Sinon, utilisez :
+
+<?php
+    require_once('/path/to/html/purifier/library/HTMLPurifier.auto.load');
+    $config = $HTMLPurifier_Config::createDefault();
+    $config->set('Core', 'Encoding', 'ISO-8859-1'); //Remplacez par votre
+    encodage
+    $config->set('Core', 'XHTML', true); //Remplacer par false si HTML 4.01
+    $purificateur = new HTMLPurifier($config);
+    $html_propre = $purificateur->purify($html_a_purifier);
+?>
+
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/LICENSE b/library/ezyang/htmlpurifier/LICENSE
new file mode 100644
index 0000000000..8c88a20d45
--- /dev/null
+++ b/library/ezyang/htmlpurifier/LICENSE
@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+  To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights.  These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+  For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you.  You must make sure that they, too, receive or can get the source
+code.  If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it.  And you must show them these terms so they know their rights.
+
+  We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+  To protect each distributor, we want to make it very clear that
+there is no warranty for the free library.  Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+
+  Finally, software patents pose a constant threat to the existence of
+any free program.  We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder.  Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+  Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License.  This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License.  We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+  When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library.  The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom.  The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+  We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License.  It also provides other free software developers Less
+of an advantage over competing non-free programs.  These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries.  However, the Lesser license provides advantages in certain
+special circumstances.
+
+  For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard.  To achieve this, non-free programs must be
+allowed to use the library.  A more frequent case is that a free
+library does the same job as widely used non-free libraries.  In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+  In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software.  For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+  Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.  Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library".  The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+
+		  GNU LESSER GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+  A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+  The "Library", below, refers to any such software library or work
+which has been distributed under these terms.  A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language.  (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+  "Source code" for a work means the preferred form of the work for
+making modifications to it.  For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control compilation
+and installation of the library.
+
+  Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it).  Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+  1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+  You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+  2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) The modified work must itself be a software library.
+
+    b) You must cause the files modified to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    c) You must cause the whole of the work to be licensed at no
+    charge to all third parties under the terms of this License.
+
+    d) If a facility in the modified Library refers to a function or a
+    table of data to be supplied by an application program that uses
+    the facility, other than as an argument passed when the facility
+    is invoked, then you must make a good faith effort to ensure that,
+    in the event an application does not supply such function or
+    table, the facility still operates, and performs whatever part of
+    its purpose remains meaningful.
+
+    (For example, a function in a library to compute square roots has
+    a purpose that is entirely well-defined independent of the
+    application.  Therefore, Subsection 2d requires that any
+    application-supplied function or table used by this function must
+    be optional: if the application does not supply it, the square
+    root function must still compute square roots.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Library,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Library, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Library.
+
+In addition, mere aggregation of another work not based on the Library
+with the Library (or with a work based on the Library) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may opt to apply the terms of the ordinary GNU General Public
+License instead of this License to a given copy of the Library.  To do
+this, you must alter all the notices that refer to this License, so
+that they refer to the ordinary GNU General Public License, version 2,
+instead of to this License.  (If a newer version than version 2 of the
+ordinary GNU General Public License has appeared, then you can specify
+that version instead if you wish.)  Do not make any other change in
+these notices.
+
+  Once this change is made in a given copy, it is irreversible for
+that copy, so the ordinary GNU General Public License applies to all
+subsequent copies and derivative works made from that copy.
+
+  This option is useful when you wish to copy part of the code of
+the Library into a program that is not a library.
+
+  4. You may copy and distribute the Library (or a portion or
+derivative of it, under Section 2) in object code or executable form
+under the terms of Sections 1 and 2 above provided that you accompany
+it with the complete corresponding machine-readable source code, which
+must be distributed under the terms of Sections 1 and 2 above on a
+medium customarily used for software interchange.
+
+  If distribution of object code is made by offering access to copy
+from a designated place, then offering equivalent access to copy the
+source code from the same place satisfies the requirement to
+distribute the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  5. A program that contains no derivative of any portion of the
+Library, but is designed to work with the Library by being compiled or
+linked with it, is called a "work that uses the Library".  Such a
+work, in isolation, is not a derivative work of the Library, and
+therefore falls outside the scope of this License.
+
+  However, linking a "work that uses the Library" with the Library
+creates an executable that is a derivative of the Library (because it
+contains portions of the Library), rather than a "work that uses the
+library".  The executable is therefore covered by this License.
+Section 6 states terms for distribution of such executables.
+
+  When a "work that uses the Library" uses material from a header file
+that is part of the Library, the object code for the work may be a
+derivative work of the Library even though the source code is not.
+Whether this is true is especially significant if the work can be
+linked without the Library, or if the work is itself a library.  The
+threshold for this to be true is not precisely defined by law.
+
+  If such an object file uses only numerical parameters, data
+structure layouts and accessors, and small macros and small inline
+functions (ten lines or less in length), then the use of the object
+file is unrestricted, regardless of whether it is legally a derivative
+work.  (Executables containing this object code plus portions of the
+Library will still fall under Section 6.)
+
+  Otherwise, if the work is a derivative of the Library, you may
+distribute the object code for the work under the terms of Section 6.
+Any executables containing that work also fall under Section 6,
+whether or not they are linked directly with the Library itself.
+
+  6. As an exception to the Sections above, you may also combine or
+link a "work that uses the Library" with the Library to produce a
+work containing portions of the Library, and distribute that work
+under terms of your choice, provided that the terms permit
+modification of the work for the customer's own use and reverse
+engineering for debugging such modifications.
+
+  You must give prominent notice with each copy of the work that the
+Library is used in it and that the Library and its use are covered by
+this License.  You must supply a copy of this License.  If the work
+during execution displays copyright notices, you must include the
+copyright notice for the Library among them, as well as a reference
+directing the user to the copy of this License.  Also, you must do one
+of these things:
+
+    a) Accompany the work with the complete corresponding
+    machine-readable source code for the Library including whatever
+    changes were used in the work (which must be distributed under
+    Sections 1 and 2 above); and, if the work is an executable linked
+    with the Library, with the complete machine-readable "work that
+    uses the Library", as object code and/or source code, so that the
+    user can modify the Library and then relink to produce a modified
+    executable containing the modified Library.  (It is understood
+    that the user who changes the contents of definitions files in the
+    Library will not necessarily be able to recompile the application
+    to use the modified definitions.)
+
+    b) Use a suitable shared library mechanism for linking with the
+    Library.  A suitable mechanism is one that (1) uses at run time a
+    copy of the library already present on the user's computer system,
+    rather than copying library functions into the executable, and (2)
+    will operate properly with a modified version of the library, if
+    the user installs one, as long as the modified version is
+    interface-compatible with the version that the work was made with.
+
+    c) Accompany the work with a written offer, valid for at
+    least three years, to give the same user the materials
+    specified in Subsection 6a, above, for a charge no more
+    than the cost of performing this distribution.
+
+    d) If distribution of the work is made by offering access to copy
+    from a designated place, offer equivalent access to copy the above
+    specified materials from the same place.
+
+    e) Verify that the user has already received a copy of these
+    materials or that you have already sent this user a copy.
+
+  For an executable, the required form of the "work that uses the
+Library" must include any data and utility programs needed for
+reproducing the executable from it.  However, as a special exception,
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies
+the executable.
+
+  It may happen that this requirement contradicts the license
+restrictions of other proprietary libraries that do not normally
+accompany the operating system.  Such a contradiction means you cannot
+use both them and the Library together in an executable that you
+distribute.
+
+  7. You may place library facilities that are a work based on the
+Library side-by-side in a single library together with other library
+facilities not covered by this License, and distribute such a combined
+library, provided that the separate distribution of the work based on
+the Library and of the other library facilities is otherwise
+permitted, and provided that you do these two things:
+
+    a) Accompany the combined library with a copy of the same work
+    based on the Library, uncombined with any other library
+    facilities.  This must be distributed under the terms of the
+    Sections above.
+
+    b) Give prominent notice with the combined library of the fact
+    that part of it is a work based on the Library, and explaining
+    where to find the accompanying uncombined form of the same work.
+
+  8. You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License.  Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License.  However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+  9. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Library or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+  10. Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+
+  11. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under any
+particular circumstance, the balance of the section is intended to apply,
+and the section as a whole is intended to apply in other circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  12. If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License may add
+an explicit geographical distribution limitation excluding those countries,
+so that distribution is permitted only in or among countries not thus
+excluded.  In such case, this License incorporates the limitation as if
+written in the body of this License.
+
+  13. The Free Software Foundation may publish revised and/or new
+versions of the Lesser General Public License from time to time.
+Such new versions will be similar in spirit to the present version,
+but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Library
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation.  If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+
+  14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission.  For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this.  Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+			    NO WARRANTY
+
+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/NEWS b/library/ezyang/htmlpurifier/NEWS
new file mode 100644
index 0000000000..a9124af1a1
--- /dev/null
+++ b/library/ezyang/htmlpurifier/NEWS
@@ -0,0 +1,1094 @@
+NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
+|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
+= KEY ====================
+    # Breaks back-compat
+    ! Feature
+    - Bugfix
+      + Sub-comment
+    . Internal change
+==========================
+
+4.7.0, released 2015-08-04
+# opacity is now considered a "tricky" CSS property rather than a
+  proprietary one.
+! %AutoFormat.RemoveEmpty.Predicate for specifying exactly when
+  an element should be considered "empty" (maybe preserve if it
+  has attributes), and modify iframe support so that the iframe
+  is removed if it is missing a src attribute.  Thanks meeva for
+  reporting.
+- Don't truncate upon encountering </div> when using DOMLex.  Thanks
+  Myrto Christina for finally convincing me to fix this.
+- Update YouTube filter for new code.
+- Fix parsing of rgb() values with spaces in them for 'border'
+  attribute.
+- Don't remove foo="" attributes if foo is a boolean attribute.  Thanks
+  valME for reporting.
+
+4.6.0, released 2013-11-30
+# Secure URI munge hashing algorithm has changed to hash_hmac("sha256", $url, $secret).
+  Please update any verification scripts you may have.
+# URI parsing algorithm was made more strict, so only prefixes which
+  looks like schemes will actually be schemes.  Thanks
+  Michael Gusev <mgusev@sugarcrm.com> for fixing.
+# %Core.EscapeInvalidChildren is no longer supported, and no longer does
+  anything.
+! New directive %Core.AllowHostnameUnderscore which allows underscores
+  in hostnames.
+- Eliminate quadratic behavior in DOMLex by using a proper queue.
+  Thanks Ole Laursen for noticing this.
+- Rewritten MakeWellFormed/FixNesting implementation eliminates quadratic
+  behavior in the rest of the purificaiton pipeline.  Thanks Chedburn
+  Networks for sponsoring this work.
+- Made Linkify URL parser a bit less permissive, so that non-breaking
+  spaces and commas are not included as part of URL.  Thanks nAS for fixing.
+- Fix some bad interactions with %HTML.Allowed and injectors.  Thanks
+  David Hirtz for reporting.
+- Fix infinite loop in DirectLex. Thanks Ashar Javed (@soaj1664ashar)
+  for reporting.
+
+4.5.0, released 2013-02-17
+# Fix bug where stacked attribute transforms clobber each other;
+  this also means it's no longer possible to override attribute
+  transforms in later modules.  No internal code was using this
+  but this may break some clients.
+# We now use SHA-1 to identify cached definitions, instead of MD5.
+! Support display:inline-block
+! Support for more white-space CSS values.
+! Permit underscores in font families
+! Support for page-break-* CSS3 properties when proprietary properties
+  are enabled.
+! New directive %Core.DisableExcludes; can be set to 'true' to turn off
+  SGML excludes checking.  If HTML Purifier is removing too much text
+  and you don't care about full standards compliance, try setting this to
+  'true'.
+- Use prepend for SPL autoloading on PHP 5.3 and later.
+- Fix bug with nofollow transform when pre-existing rel exists.
+- Fix bug where background:url() always gets lower-cased
+  (but not background-image:url())
+- Fix bug with non lower-case color names in HTML
+- Fix bug where data URI validation doesn't remove temporary files.
+  Thanks Javier Marín Ros <javiermarinros@gmail.com> for reporting.
+- Don't remove certain empty tags on RemoveEmpty.
+
+4.4.0, released 2012-01-18
+# Removed PEARSax3 handler.
+# URI.Munge now munges URIs inside the same host that go from https
+  to http.  Reported by Neike Taika-Tessaro.
+# Core.EscapeNonASCIICharacters now always transforms entities to
+  entities, even if target encoding is UTF-8.
+# Tighten up selector validation in ExtractStyleBlocks.
+  Non-syntactically valid selectors are now rejected, along with
+  some of the more obscure ones such as attribute selectors, the
+  :lang pseudoselector, and anything not in CSS2.1.  Furthermore,
+  ID and class selectors now work properly with the relevant
+  configuration attributes.  Also, mute errors when parsing CSS
+  with CSS Tidy.  Reported by Mario Heiderich and Norman Hippert.
+! Added support for 'scope' attribute on tables.
+! Added %HTML.TargetBlank, which adds target="blank" to all outgoing links.
+! Properly handle sub-lists directly nested inside of lists in
+  a standards compliant way, by moving them into the preceding <li>
+! Added %HTML.AllowedComments and %HTML.AllowedCommentsRegexp for
+  limited allowed comments in untrusted situations.
+! Implement iframes, and allow them to be used in untrusted mode with
+  %HTML.SafeIframe and %URI.SafeIframeRegexp.  Thanks Bradley M. Froehle
+  <brad.froehle@gmail.com> for submitting an initial version of the patch.
+! The Forms module now works properly for transitional doctypes.
+! Added support for internationalized domain names. You need the PEAR
+  Net_IDNA2 module to be in your path; if it is installed, ensure the
+  class can be loaded and then set %Core.EnableIDNA to true.
+- Color keywords are now case insensitive.  Thanks Yzmir Ramirez
+  <yramirez-htmlpurifier@adicio.com> for reporting.
+- Explicitly initialize anonModule variable to null.
+- Do not duplicate nofollow if already present.  Thanks 178
+  for reporting.
+- Do not add nofollow if hostname matches our current host.  Thanks 178
+  for reporting, and Neike Taika-Tessaro for helping diagnose.
+- Do not unset parser variable; this fixes intermittent serialization
+  problems.  Thanks Neike Taika-Tessaro for reporting, bill
+  <10010tiger@gmail.com> for diagnosing.
+- Fix iconv truncation bug, where non-UTF-8 target encodings see
+  output truncated after around 8000 characters.  Thanks Jörg Ludwig
+  <joerg.ludwig@iserv.eu> for reporting.
+- Fix broken table content model for XHTML1.1 (and also earlier
+  versions, although the W3C validator doesn't catch those violations).
+  Thanks GlitchMr <glitch.mr@gmail.com> for reporting.
+
+4.3.0, released 2011-03-27
+# Fixed broken caching of customized raw definitions, but requires an
+  API change.  The old API still works but will emit a warning,
+  see http://htmlpurifier.org/docs/enduser-customize.html#optimized
+  for how to upgrade your code.
+# Protect against Internet Explorer innerHTML behavior by specially
+  treating attributes with backticks but no angled brackets, quotes or
+  spaces.  This constitutes a slight semantic change, which can be
+  reverted using %Output.FixInnerHTML.  Reported by Neike Taika-Tessaro
+  and Mario Heiderich.
+# Protect against cssText/innerHTML by restricting allowed characters
+  used in fonts further than mandated by the specification and encoding
+  some extra special characters in URLs.  Reported by Neike
+  Taika-Tessaro and Mario Heiderich.
+! Added %HTML.Nofollow to add rel="nofollow" to external links.
+! More types of SPL autoloaders allowed on later versions of PHP.
+! Implementations for position, top, left, right, bottom, z-index
+  when %CSS.Trusted is on.
+! Add %Cache.SerializerPermissions option for custom serializer
+  directory/file permissions
+! Fix longstanding bug in Flash support for non-IE browsers, and
+  allow more wmode attributes.
+! Add %CSS.AllowedFonts to restrict permissible font names.
+- Switch to an iterative traversal of the DOM, which prevents us
+  from running out of stack space for deeply nested documents.
+  Thanks Maxim Krizhanovsky for contributing a patch.
+- Make removal of conditional IE comments ungreedy; thanks Bernd
+  for reporting.
+- Escape CDATA before removing Internet Explorer comments.
+- Fix removal of id attributes under certain conditions by ensuring
+  armor attributes are preserved when recreating tags.
+- Check if schema.ser was corrupted.
+- Check if zend.ze1_compatibility_mode is on, and error out if it is.
+  This safety check is only done for HTMLPurifier.auto.php; if you
+  are using standalone or the specialized includes files, you're
+  expected to know what you're doing.
+- Stop repeatedly writing the cache file after I'm done customizing a
+  raw definition.  Reported by ajh.
+- Switch to using require_once in the Bootstrap to work around bad
+  interaction with Zend Debugger and APC.  Reported by Antonio Parraga.
+- Fix URI handling when hostname is missing but scheme is present.
+  Reported by Neike Taika-Tessaro.
+- Fix missing numeric entities on DirectLex; thanks Neike Taika-Tessaro
+  for reporting.
+- Fix harmless notice from indexing into empty string.  Thanks Matthijs
+  Kooijman <matthijs@stdin.nl> for reporting.
+- Don't autoclose no parent elements are able to support the element
+  that triggered the autoclose.  In particular fixes strange behavior
+  of stray <li> tags.  Thanks pkuliga@gmail.com for reporting and
+  Neike Taika-Tessaro <pinkgothic@gmail.com> for debugging assistance.
+
+4.2.0, released 2010-09-15
+! Added %Core.RemoveProcessingInstructions, which lets you remove
+  <? ... ?> statements.
+! Added %URI.DisableResources functionality; the directive originally
+  did nothing.  Thanks David Rothstein for reporting.
+! Add documentation about configuration directive types.
+! Add %CSS.ForbiddenProperties configuration directive.
+! Add %HTML.FlashAllowFullScreen to permit embedded Flash objects
+  to utilize full-screen mode.
+! Add optional support for the <code>file</code> URI scheme, enable
+  by explicitly setting %URI.AllowedSchemes.
+! Add %Core.NormalizeNewlines options to allow turning off newline
+  normalization.
+- Fix improper handling of Internet Explorer conditional comments
+  by parser.  Thanks zmonteca for reporting.
+- Fix missing attributes bug when running on Mac Snow Leopard and APC.
+  Thanks sidepodcast for the fix.
+- Warn if an element is allowed, but an attribute it requires is
+  not allowed.
+
+4.1.1, released 2010-05-31
+- Fix undefined index warnings in maintenance scripts.
+- Fix bug in DirectLex for parsing elements with a single attribute
+  with entities.
+- Rewrite CSS output logic for font-family and url().  Thanks Mario
+  Heiderich <mario.heiderich@googlemail.com> for reporting and Takeshi
+  Terada <t-terada@violet.plala.or.jp> for suggesting the fix.
+- Emit an error for CollectErrors if a body is extracted
+- Fix bug where in background-position for center keyword handling.
+- Fix infinite loop when a wrapper element is inserted in a context
+  where it's not allowed.  Thanks Lars <lars@renoz.dk> for reporting.
+- Remove +x bit and shebang from index.php; only supported mode is to
+  explicitly call it with php.
+- Make test script less chatty when log_errors is on.
+
+4.1.0, released 2010-04-26
+! Support proprietary height attribute on table element
+! Support YouTube slideshows that contain /cp/ in their URL.
+! Support for data: URI scheme; not enabled by default, add it using
+  %URI.AllowedSchemes
+! Support flashvars when using %HTML.SafeObject and %HTML.SafeEmbed.
+! Support for Internet Explorer compatibility with %HTML.SafeObject
+  using %Output.FlashCompat.
+! Handle <ol><ol> properly, by inserting the necessary <li> tag.
+- Always quote the insides of url(...) in CSS.
+
+4.0.0, released 2009-07-07
+# APIs for ConfigSchema subsystem have substantially changed. See
+  docs/dev-config-bcbreaks.txt for details; in essence, anything that
+  had both namespace and directive now have a single unified key.
+# Some configuration directives were renamed, specifically:
+    %AutoFormatParam.PurifierLinkifyDocURL -> %AutoFormat.PurifierLinkify.DocURL
+    %FilterParam.ExtractStyleBlocksEscaping -> %Filter.ExtractStyleBlocks.Escaping
+    %FilterParam.ExtractStyleBlocksScope -> %Filter.ExtractStyleBlocks.Scope
+    %FilterParam.ExtractStyleBlocksTidyImpl -> %Filter.ExtractStyleBlocks.TidyImpl
+  As usual, the old directive names will still work, but will throw E_NOTICE
+  errors.
+# The allowed values for class have been relaxed to allow all of CDATA for
+  doctypes that are not XHTML 1.1 or XHTML 2.0.  For old behavior, set
+  %Attr.ClassUseCDATA to false.
+# Instead of appending the content model to an old content model, a blank
+  element will replace the old content model.  You can use #SUPER to get
+  the old content model.
+! More robust support for name="" and id=""
+! HTMLPurifier_Config::inherit($config) allows you to inherit one
+  configuration, and have changes to that configuration be propagated
+  to all of its children.
+! Implement %HTML.Attr.Name.UseCDATA, which relaxes validation rules on
+  the name attribute when set. Use with care. Thanks Ian Cook for
+  sponsoring.
+! Implement %AutoFormat.RemoveEmpty.RemoveNbsp, which removes empty
+  tags that contain non-breaking spaces as well other whitespace. You
+  can also modify which tags should have &nbsp; maintained with
+  %AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.
+! Implement %Attr.AllowedClasses, which allows administrators to restrict
+  classes users can use to a specified finite set of classes, and
+  %Attr.ForbiddenClasses, which is the logical inverse.
+! You can now maintain your own configuration schema directories by
+  creating a config-schema.php file or passing an extra argument. Check
+  docs/dev-config-schema.html for more details.
+! Added HTMLPurifier_Config->serialize() method, which lets you save away
+  your configuration in a compact serial file, which you can unserialize
+  and use directly without having to go through the overhead of setup.
+- Fix bug where URIDefinition would not get cleared if it's directives got
+  changed.
+- Fix fatal error in HTMLPurifier_Encoder on certain platforms (probably NetBSD 5.0)
+- Fix bug in Linkify autoformatter involving <a><span>http://foo</span></a>
+- Make %URI.Munge not apply to links that have the same host as your host.
+- Prevent stray </body> tag from truncating output, if a second </body>
+  is present.
+. Created script maintenance/rename-config.php for renaming a configuration
+  directive while maintaining its alias.  This script does not change source code.
+. Implement namespace locking for definition construction, to prevent
+  bugs where a directive is used for definition construction but is not
+  used to construct the cache hash.
+
+3.3.0, released 2009-02-16
+! Implement CSS property 'overflow' when %CSS.AllowTricky is true.
+! Implement generic property list classess
+- Fix bug with testEncodingSupportsASCII() algorithm when iconv() implementation
+  does not do the "right thing" with characters not supported in the output
+  set.
+- Spellcheck UTF-8: The Secret To Character Encoding
+- Fix improper removal of the contents of elements with only whitespace. Thanks
+  Eric Wald for reporting.
+- Fix broken test suite in versions of PHP without spl_autoload_register()
+- Fix degenerate case with YouTube filter involving double hyphens.
+  Thanks Pierre Attar for reporting.
+- Fix YouTube rendering problem on certain versions of Firefox.
+- Fix CSSDefinition Printer problems with decorators
+- Add text parameter to unit tests, forces text output
+. Add verbose mode to command line test runner, use (--verbose)
+. Turn on unit tests for UnitConverter
+. Fix missing version number in configuration %Attr.DefaultImageAlt (added 3.2.0)
+. Fix newline errors that caused spurious failures when CRLF HTML Purifier was
+  tested on Linux.
+. Removed trailing whitespace from all text files, see
+  remote-trailing-whitespace.php maintenance script.
+. Convert configuration to use property list backend.
+
+3.2.0, released 2008-10-31
+# Using %Core.CollectErrors forces line number/column tracking on, whereas
+  previously you could theoretically turn it off.
+# HTMLPurifier_Injector->notifyEnd() is formally deprecated. Please
+  use handleEnd() instead.
+! %Output.AttrSort for when you need your attributes in alphabetical order to
+  deal with a bug in FCKEditor. Requested by frank farmer.
+! Enable HTML comments when %HTML.Trusted is on. Requested by Waldo Jaquith.
+! Proper support for name attribute. It is now allowed and equivalent to the id
+  attribute in a and img tags, and is only converted to id when %HTML.TidyLevel
+  is heavy (for all doctypes).
+! %AutoFormat.RemoveEmpty to remove some empty tags from documents. Please don't
+  use on hand-written HTML.
+! Add error-cases for unsupported elements in MakeWellFormed. This enables
+  the strategy to be used, standalone, on untrusted input.
+! %Core.AggressivelyFixLt is on by default. This causes more sensible
+  processing of left angled brackets in smileys and other whatnot.
+! Test scripts now have a 'type' parameter, which lets you say 'htmlpurifier',
+  'phpt', 'vtest', etc. in order to only execute those tests. This supercedes
+  the --only-phpt parameter, although for backwards-compatibility the flag
+  will still work.
+! AutoParagraph auto-formatter will now preserve double-newlines upon output.
+  Users who are not performing inbound filtering, this may seem a little
+  useless, but as a bonus, the test suite and handling of edge cases is also
+  improved.
+! Experimental implementation of forms for %HTML.Trusted
+! Track column numbers when maintain line numbers is on
+! Proprietary 'background' attribute on table-related elements converted into
+  corresponding CSS.  Thanks Fusemail for sponsoring this feature!
+! Add forward(), forwardUntilEndToken(), backward() and current() to Injector
+  supertype.
+! HTMLPurifier_Injector->handleEnd() permits modification to end tokens. The
+  time of operation varies slightly from notifyEnd() as *all* end tokens are
+  processed by the injector before they are subject to the well-formedness rules.
+! %Attr.DefaultImageAlt allows overriding default behavior of setting alt to
+  basename of image when not present.
+! %AutoFormat.DisplayLinkURI neuters <a> tags into plain text URLs.
+- Fix two bugs in %URI.MakeAbsolute; one involving empty paths in base URLs,
+  the other involving an undefined $is_folder error.
+- Throw error when %Core.Encoding is set to a spurious value. Previously,
+  this errored silently and returned false.
+- Redirected stderr to stdout for flush error output.
+- %URI.DisableExternal will now use the host in %URI.Base if %URI.Host is not
+  available.
+- Do not re-munge URL if the output URL has the same host as the input URL.
+  Requested by Chris.
+- Fix error in documentation regarding %Filter.ExtractStyleBlocks
+- Prevent <![CDATA[<body></body>]]> from triggering %Core.ConvertDocumentToFragment
+- Fix bug with inline elements in blockquotes conflicting with strict doctype
+- Detect if HTML support is disabled for DOM by checking for loadHTML() method.
+- Fix bug where dots and double-dots in absolute URLs without hostname were
+  not collapsed by URIFilter_MakeAbsolute.
+- Fix bug with anonymous modules operating on SafeEmbed or SafeObject elements
+  by reordering their addition.
+- Will now throw exception on many error conditions during lexer creation; also
+  throw an exception when MaintainLineNumbers is true, but a non-tracksLineNumbers
+  is being used.
+- Detect if domxml extension is loaded, and use DirectLEx accordingly.
+- Improve handling of big numbers with floating point arithmetic in UnitConverter.
+  Reported by David Morton.
+. Strategy_MakeWellFormed now operates in-place, saving memory and allowing
+  for more interesting filter-backtracking
+. New HTMLPurifier_Injector->rewind() functionality, allows injectors to rewind
+  index to reprocess tokens.
+. StringHashParser now allows for multiline sections with "empty" content;
+  previously the section would remain undefined.
+. Added --quick option to multitest.php, which tests only the most recent
+  release for each series.
+. Added --distro option to multitest.php, which accepts either 'normal' or
+  'standalone'. This supercedes --exclude-normal and --exclude-standalone
+
+3.1.1, released 2008-06-19
+# %URI.Munge now, by default, does not munge resources (for example, <img src="">)
+  In order to enable this again, please set %URI.MungeResources to true.
+! More robust imagecrash protection with height/width CSS with %CSS.MaxImgLength,
+  and height/width HTML with %HTML.MaxImgLength.
+! %URI.MungeSecretKey for secure URI munging. Thanks Chris
+  for sponsoring this feature. Check out the corresponding documentation
+  for details. (Att Nightly testers: The API for this feature changed before
+  the general release. Namely, rename your directives %URI.SecureMungeSecretKey =>
+  %URI.MungeSecretKey and and %URI.SecureMunge => %URI.Munge)
+! Implemented post URI filtering. Set member variable $post to true to set
+  a URIFilter as such.
+! Allow modules to define injectors via $info_injector. Injectors are
+  automatically disabled if injector's needed elements are not found.
+! Support for "safe" objects added, use %HTML.SafeObject and %HTML.SafeEmbed.
+  Thanks Chris for sponsoring. If you've been using ad hoc code from the
+  forums, PLEASE use this instead.
+! Added substitutions for %e, %n, %a and %p in %URI.Munge (in order,
+  embedded, tag name, attribute name, CSS property name). See %URI.Munge
+  for more details. Requested by Jochem Blok.
+- Disable percent height/width attributes for img.
+- AttrValidator operations are now atomic; updates to attributes are not
+  manifest in token until end of operations. This prevents naughty internal
+  code from directly modifying CurrentToken when they're not supposed to.
+  This semantics change was requested by frank farmer.
+- Percent encoding checks enabled for URI query and fragment
+- Fix stray backslashes in font-family; CSS Unicode character escapes are
+  now properly resolved (although *only* in font-family). Thanks Takeshi Terada
+  for reporting.
+- Improve parseCDATA algorithm to take into account newline normalization
+- Account for browser confusion between Yen character and backslash in
+  Shift_JIS encoding. This fix generalizes to any other encoding which is not
+  a strict superset of printable ASCII. Thanks Takeshi Terada for reporting.
+- Fix missing configuration parameter in Generator calls. Thanks vs for the
+  partial patch.
+- Improved adherence to Unicode by checking for non-character codepoints.
+  Thanks Geoffrey Sneddon for reporting. This may result in degraded
+  performance for extremely large inputs.
+- Allow CSS property-value pair ''text-decoration: none''. Thanks Jochem Blok
+  for reporting.
+. Added HTMLPurifier_UnitConverter and HTMLPurifier_Length for convenient
+  handling of CSS-style lengths. HTMLPurifier_AttrDef_CSS_Length now uses
+  this class.
+. API of HTMLPurifier_AttrDef_CSS_Length changed from __construct($disable_negative)
+  to __construct($min, $max). __construct(true) is equivalent to
+  __construct('0').
+. Added HTMLPurifier_AttrDef_Switch class
+. Rename HTMLPurifier_HTMLModule_Tidy->construct() to setup() and bubble method
+  up inheritance hierarchy to HTMLPurifier_HTMLModule. All HTMLModules
+  get this called with the configuration object.  All modules now
+  use this rather than __construct(), although legacy code using constructors
+  will still work--the new format, however, lets modules access the
+  configuration object for HTML namespace dependant tweaks.
+. AttrDef_HTML_Pixels now takes a single construction parameter, pixels.
+. ConfigSchema data-structure heavily optimized; on average it uses a third
+  the memory it did previously. The interface has changed accordingly,
+  consult changes to HTMLPurifier_Config for details.
+. Variable parsing types now are magic integers instead of strings
+. Added benchmark for ConfigSchema
+. HTMLPurifier_Generator requires $config and $context parameters. If you
+  don't know what they should be, use HTMLPurifier_Config::createDefault()
+  and new HTMLPurifier_Context().
+. Printers now properly distinguish between output configuration, and
+  target configuration. This is not applicable to scripts using
+  the Printers for HTML Purifier related tasks.
+. HTML/CSS Printers must be primed with prepareGenerator($gen_config), otherwise
+  fatal errors will ensue.
+. URIFilter->prepare can return false in order to abort loading of the filter
+. Factory for AttrDef_URI implemented, URI#embedded to indicate URI that embeds
+  an external resource.
+. %URI.Munge functionality factored out into a post-filter class.
+. Added CurrentCSSProperty context variable during CSS validation
+
+3.1.0, released 2008-05-18
+# Unnecessary references to objects (vestiges of PHP4) removed from method
+  signatures.  The following methods do not need references when assigning from
+  them and will result in E_STRICT errors if you try:
+    + HTMLPurifier_Config->get*Definition() [* = HTML, CSS]
+    + HTMLPurifier_ConfigSchema::instance()
+    + HTMLPurifier_DefinitionCacheFactory::instance()
+    + HTMLPurifier_DefinitionCacheFactory->create()
+    + HTMLPurifier_DoctypeRegistry->register()
+    + HTMLPurifier_DoctypeRegistry->get()
+    + HTMLPurifier_HTMLModule->addElement()
+    + HTMLPurifier_HTMLModule->addBlankElement()
+    + HTMLPurifier_LanguageFactory::instance()
+# Printer_ConfigForm's get*() functions were static-ified
+# %HTML.ForbiddenAttributes requires attribute declarations to be in the
+  form of tag@attr, NOT tag.attr (which will throw an error and won't do
+  anything). This is for forwards compatibility with XML; you'd do best
+  to migrate an %HTML.AllowedAttributes directives to this syntax too.
+! Allow index to be false for config from form creation
+! Added HTMLPurifier::VERSION constant
+! Commas, not dashes, used for serializer IDs. This change is forwards-compatible
+  and allows for version numbers like "3.1.0-dev".
+! %HTML.Allowed deals gracefully with whitespace anywhere, anytime!
+! HTML Purifier's URI handling is a lot more robust, with much stricter
+  validation checks and better percent encoding handling. Thanks Gareth Heyes
+  for indicating security vulnerabilities from lax percent encoding.
+! Bootstrap autoloader deals more robustly with classes that don't exist,
+  preventing class_exists($class, true) from barfing.
+- InterchangeBuilder now alphabetizes its lists
+- Validation error in configdoc output fixed
+- Iconv and other encoding errors muted even with custom error handlers that
+  do not honor error_reporting
+- Add protection against imagecrash attack with CSS height/width
+- HTMLPurifier::instance() created for consistency, is equivalent to getInstance()
+- Fixed and revamped broken ConfigForm smoketest
+- Bug with bool/null fields in Printer_ConfigForm fixed
+- Bug with global forbidden attributes fixed
+- Improved error messages for allowed and forbidden HTML elements and attributes
+- Missing (or null) in configdoc documentation restored
+- If DOM throws and exception during parsing with PH5P (occurs in newer versions
+  of DOM), HTML Purifier punts to DirectLex
+- Fatal error with unserialization of ScriptRequired
+- Created directories are now chmod'ed properly
+- Fixed bug with fallback languages in LanguageFactory
+- Standalone testing setup properly with autoload
+. Out-of-date documentation revised
+. UTF-8 encoding check optimization as suggested by Diego
+. HTMLPurifier_Error removed in favor of exceptions
+. More copy() function removed; should use clone instead
+. More extensive unit tests for HTMLDefinition
+. assertPurification moved to central harness
+. HTMLPurifier_Generator accepts $config and $context parameters during
+  instantiation, not runtime
+. Double-quotes outside of attribute values are now unescaped
+
+3.1.0rc1, released 2008-04-22
+# Autoload support added. Internal require_once's removed in favor of an
+  explicit require list or autoloading. To use HTML Purifier,
+  you must now either use HTMLPurifier.auto.php
+  or HTMLPurifier.includes.php; setting the include path and including
+  HTMLPurifier.php is insufficient--in such cases include HTMLPurifier.autoload.php
+  as well to register our autoload handler (or modify your autoload function
+  to check HTMLPurifier_Bootstrap::getPath($class)). You can also use
+  HTMLPurifier.safe-includes.php for a less performance friendly but more
+  user-friendly library load.
+# HTMLPurifier_ConfigSchema static functions are officially deprecated. Schema
+  information is stored in the ConfigSchema directory, and the
+  maintenance/generate-schema-cache.php generates the schema.ser file, which
+  is now instantiated. Support for userland schema changes coming soon!
+# HTMLPurifier_Config will now throw E_USER_NOTICE when you use a directive
+  alias; to get rid of these errors just modify your configuration to use
+  the new directive name.
+# HTMLPurifier->addFilter is deprecated; built-in filters can now be
+  enabled using %Filter.$filter_name or by setting your own filters using
+  %Filter.Custom
+# Directive-level safety properties superceded in favor of module-level
+  safety. Internal method HTMLModule->addElement() has changed, although
+  the externally visible HTMLDefinition->addElement has *not* changed.
+! Extra utility classes for testing and non-library operations can
+  be found in extras/. Specifically, these are FSTools and ConfigDoc.
+  You may find a use for these in your own project, but right now they
+  are highly experimental and volatile.
+! Integration with PHPT allows for automated smoketests
+! Limited support for proprietary HTML elements, namely <marquee>, sponsored
+  by Chris. You can enable them with %HTML.Proprietary if your client
+  demands them.
+! Support for !important CSS cascade modifier. By default, this will be stripped
+  from CSS, but you can enable it using %CSS.AllowImportant
+! Support for display and visibility CSS properties added, set %CSS.AllowTricky
+  to true to use them.
+! HTML Purifier now has its own Exception hierarchy under HTMLPurifier_Exception.
+  Developer error (not enduser error) can cause these to be triggered.
+! Experimental kses() wrapper introduced with HTMLPurifier.kses.php
+! Finally %CSS.AllowedProperties for tweaking allowed CSS properties without
+  mucking around with HTMLPurifier_CSSDefinition
+! ConfigDoc output has been enhanced with version and deprecation info.
+! %HTML.ForbiddenAttributes and %HTML.ForbiddenElements implemented.
+- Autoclose now operates iteratively, i.e. <span><span><div> now has
+  both span tags closed.
+- Various HTMLPurifier_Config convenience functions now accept another parameter
+  $schema which defines what HTMLPurifier_ConfigSchema to use besides the
+  global default.
+- Fix bug with trusted script handling in libxml versions later than 2.6.28.
+- Fix bug in ExtractStyleBlocks with comments in style tags
+- Fix bug in comment parsing for DirectLex
+- Flush output now displayed when in command line mode for unit tester
+- Fix bug with rgb(0, 1, 2) color syntax with spaces inside shorthand syntax
+- HTMLPurifier_HTMLDefinition->addAttribute can now be called multiple times
+  on the same element without emitting errors.
+- Fixed fatal error in PH5P lexer with invalid tag names
+. Plugins now get their own changelogs according to project conventions.
+. Convert tokens to use instanceof, reducing memory footprint and
+  improving comparison speed.
+. Dry runs now supported in SimpleTest; testing facilities improved
+. Bootstrap class added for handling autoloading functionality
+. Implemented recursive glob at FSTools->globr
+. ConfigSchema now has instance methods for all corresponding define*
+  static methods.
+. A couple of new historical maintenance scripts were added.
+. HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php split into two files
+. tests/index.php can now be run from any directory.
+. HTMLPurifier_Token subclasses split into seperate files
+. HTMLPURIFIER_PREFIX now is defined in Bootstrap.php, NOT HTMLPurifier.php
+. HTMLPURIFIER_PREFIX can now be defined outside of HTML Purifier
+. New --php=php flag added, allows PHP executable to be specified (command
+  line only!)
+. htmlpurifier_add_test() preferred method to translate test files in to
+  classes, because it handles PHPT files too.
+. Debugger class is deprecated and will be removed soon.
+. Command line argument parsing for testing scripts revamped, now --opt value
+  format is supported.
+. Smoketests now cleanup after magic quotes
+. Generator now can output comments (however, comments are still stripped
+  from HTML Purifier output)
+. HTMLPurifier_ConfigSchema->validate() deprecated in favor of
+  HTMLPurifier_VarParser->parse()
+. Integers auto-cast into float type by VarParser.
+. HTMLPURIFIER_STRICT removed; no validation is performed on runtime, only
+  during cache generation
+. Reordered script calls in maintenance/flush.php
+. Command line scripts now honor exit codes
+. When --flush fails in unit testers, abort tests and print message
+. Improved documentation in docs/dev-flush.html about the maintenance scripts
+. copy() methods removed in favor of clone keyword
+
+3.0.0, released 2008-01-06
+# HTML Purifier is PHP 5 only! The 2.1.x branch will be maintained
+  until PHP 4 is completely deprecated, but no new features will be added
+  to it.
+  + Visibility declarations added
+  + Constructor methods renamed to __construct()
+  + PHP4 reference cruft removed (in progress)
+! CSS properties are now case-insensitive
+! DefinitionCacheFactory now can register new implementations
+! New HTMLPurifier_Filter_ExtractStyleBlocks for extracting <style> from
+  documents and cleaning their contents up. Requires the CSSTidy library
+  <http://csstidy.sourceforge.net/>. You can access the blocks with the
+  'StyleBlocks' Context variable ($purifier->context->get('StyleBlocks')).
+  The output CSS can also be "scoped" for a specific element, use:
+  %Filter.ExtractStyleBlocksScope
+! Experimental support for some proprietary CSS attributes allowed:
+  opacity (and all of the browser-specific equivalents) and scrollbar colors.
+  Enable by setting %CSS.Proprietary to true.
+- Colors missing # but in hex form will be corrected
+- CSS Number algorithm improved
+- Unit testing and multi-testing now on steroids: command lines,
+  XML output, and other goodies now added.
+. Unit tests for Injector improved
+. New classes:
+  + HTMLPurifier_AttrDef_CSS_AlphaValue
+  + HTMLPurifier_AttrDef_CSS_Filter
+. Multitest now has a file docblock
+
+2.1.3, released 2007-11-05
+! tests/multitest.php allows you to test multiple versions by running
+  tests/index.php through multiple interpreters using `phpv` shell
+  script (you must provide this script!)
+- Fixed poor include ordering for Email URI AttrDefs, causes fatal errors
+  on some systems.
+- Injector algorithm further refined: off-by-one error regarding skip
+  counts for dormant injectors fixed
+- Corrective blockquote definition now enabled for HTML 4.01 Strict
+- Fatal error when <img> tag (or any other element with required attributes)
+  has 'id' attribute fixed, thanks NykO18 for reporting
+- Fix warning emitted when a non-supported URI scheme is passed to the
+  MakeAbsolute URIFilter, thanks NykO18 (again)
+- Further refine AutoParagraph injector. Behavior inside of elements
+  allowing paragraph tags clarified: only inline content delimeted by
+  double newlines (not block elements) are paragraphed.
+- Buggy treatment of end tags of elements that have required attributes
+  fixed (does not manifest on default tag-set)
+- Spurious internal content reorganization error suppressed
+- HTMLDefinition->addElement now returns a reference to the created
+  element object, as implied by the documentation
+- Phorum mod's HTML Purifier help message expanded (unreleased elsewhere)
+- Fix a theoretical class of infinite loops from DirectLex reported
+  by Nate Abele
+- Work around unnecessary DOMElement type-cast in PH5P that caused errors
+  in PHP 5.1
+- Work around PHP 4 SimpleTest lack-of-error complaining for one-time-only
+  HTMLDefinition errors, this may indicate problems with error-collecting
+  facilities in PHP 5
+- Make ErrorCollectorEMock work in both PHP 4 and PHP 5
+- Make PH5P work with PHP 5.0 by removing unnecessary array parameter typedef
+. %Core.AcceptFullDocuments renamed to %Core.ConvertDocumentToFragment
+  to better communicate its purpose
+. Error unit tests can now specify the expectation of no errors. Future
+  iterations of the harness will be extremely strict about what errors
+  are allowed
+. Extend Injector hooks to allow for more powerful injector routines
+. HTMLDefinition->addBlankElement created, as according to the HTMLModule
+  method
+. Doxygen configuration file updated, with minor improvements
+. Test runner now checks for similarly named files in conf/ directory too.
+. Minor cosmetic change to flush-definition-cache.php: trailing newline is
+  outputted
+. Maintenance script for generating PH5P patch added, original PH5P source
+  file also added under version control
+. Full unit test runner script title made more descriptive with PHP version
+. Updated INSTALL file to state that 4.3.7 is the earliest version we
+  are actively testing
+
+2.1.2, released 2007-09-03
+! Implemented Object module for trusted users
+! Implemented experimental HTML5 parsing mode using PH5P. To use, add
+  this to your code:
+        require_once 'HTMLPurifier/Lexer/PH5P.php';
+        $config->set('Core', 'LexerImpl', 'PH5P');
+  Note that this Lexer introduces some classes not in the HTMLPurifier
+  namespace.  Also, this is PHP5 only.
+! CSS property border-spacing implemented
+- Fix non-visible parsing error in DirectLex with empty tags that have
+  slashes inside attribute values.
+- Fix typo in CSS definition: border-collapse:seperate; was incorrectly
+  accepted as valid CSS. Usually non-visible, because this styling is the
+  default for tables in most browsers. Thanks Brett Zamir for pointing
+  this out.
+- Fix validation errors in configuration form
+- Hammer out a bunch of edge-case bugs in the standalone distribution
+- Inclusion reflection removed from URISchemeRegistry; you must manually
+  include any new schema files you wish to use
+- Numerous typo fixes in documentation thanks to Brett Zamir
+. Unit test refactoring for one logical test per test function
+. Config and context parameters in ComplexHarness deprecated: instead, edit
+  the $config and $context member variables
+. HTML wrapper in DOMLex now takes DTD identifiers into account; doesn't
+  really make a difference, but is good for completeness sake
+. merge-library.php script refactored for greater code reusability and
+  PHP4 compatibility
+
+2.1.1, released 2007-08-04
+- Fix show-stopper bug in %URI.MakeAbsolute functionality
+- Fix PHP4 syntax error in standalone version
+. Add prefix directory to include path for standalone, this prevents
+  other installations from clobbering the standalone's URI schemes
+. Single test methods can be invoked by prefixing with __only
+
+2.1.0, released 2007-08-02
+# flush-htmldefinition-cache.php superseded in favor of a generic
+  flush-definition-cache.php script, you can clear a specific cache
+  by passing its name as a parameter to the script
+! Phorum mod implemented for HTML Purifier
+! With %Core.AggressivelyFixLt, <3 and similar emoticons no longer
+  trigger HTML removal in PHP5 (DOMLex). This directive is not necessary
+  for PHP4 (DirectLex).
+! Standalone file now available, which greatly reduces the amount of
+  includes (although there are still a few files that reside in the
+  standalone folder)
+! Relative URIs can now be transformed into their absolute equivalents
+  using %URI.Base and %URI.MakeAbsolute
+! Ruby implemented for XHTML 1.1
+! You can now define custom URI filtering behavior, see enduser-uri-filter.html
+  for more details
+! UTF-8 font names now supported in CSS
+- AutoFormatters emit friendly error messages if tags or attributes they
+  need are not allowed
+- ConfigForm's compactification of directive names is now configurable
+- AutoParagraph autoformatter algorithm refined after field-testing
+- XHTML 1.1 now applies XHTML 1.0 Strict cleanup routines, namely
+  blockquote wrapping
+- Contents of <style> tags removed by default when tags are removed
+. HTMLPurifier_Config->getSerial() implemented, this is extremely useful
+  for output cache invalidation
+. ConfigForm printer now can retrieve CSS and JS files as strings, in
+  case HTML Purifier's directory is not publically accessible
+. Introduce new text/itext configuration directive values: these represent
+  longer strings that would be more appropriately edited with a textarea
+. Allow newlines to act as separators for lists, hashes, lookups and
+  %HTML.Allowed
+. ConfigForm generates textareas instead of text inputs for lists, hashes,
+  lookups, text and itext fields
+. Hidden element content removal genericized: %Core.HiddenElements can
+  be used to customize this behavior, by default <script> and <style> are
+  hidden
+. Added HTMLPURIFIER_PREFIX constant, should be used instead of dirname(__FILE__)
+. Custom ChildDef added to default include list
+. URIScheme reflection improved: will not attempt to include file if class
+  already exists. May clobber autoload, so I need to keep an eye on it
+. ConfigSchema heavily optimized, will only collect information and validate
+  definitions when HTMLPURIFIER_SCHEMA_STRICT is true.
+. AttrDef_URI unit tests and implementation refactored
+. benchmarks/ directory now protected from public view with .htaccess file;
+  run the tests via command line
+. URI scheme is munged off if there is no authority and the scheme is the
+  default one
+. All unit tests inherit from HTMLPurifier_Harness, not UnitTestCase
+. Interface for URIScheme changed
+. Generic URI object to hold components of URI added, most systems involved
+  in URI validation have been migrated to use it
+. Custom filtering for URIs factored out to URIDefinition interface for
+  maximum extensibility
+
+2.0.1, released 2007-06-27
+! Tag auto-closing now based on a ChildDef heuristic rather than a
+  manually set auto_close array; some behavior may change
+! Experimental AutoFormat functionality added: auto-paragraph and
+  linkify your HTML input by setting %AutoFormat.AutoParagraph and
+  %AutoFormat.Linkify to true
+! Newlines normalized internally, and then converted back to the
+  value of PHP_EOL. If this is not desired, set your newline format
+  using %Output.Newline.
+! Beta error collection, messages are implemented for the most generic
+  cases involving Lexing or Strategies
+- Clean up special case code for <script> tags
+- Reorder includes for DefinitionCache decorators, fixes a possible
+  missing class error
+- Fixed bug where manually modified definitions were not saved via cache
+  (mostly harmless, except for the fact that it would be a little slower)
+- Configuration objects with different serials do not clobber each
+  others when revision numbers are unequal
+- Improve Serializer DefinitionCache directory permissions checks
+- DefinitionCache no longer throws errors when it encounters old
+  serial files that do not conform to the current style
+- Stray xmlns attributes removed from configuration documentation
+- configForm.php smoketest no longer has XSS vulnerability due to
+  unescaped print_r output
+- Printer adheres to configuration's directives on output format
+- Fix improperly named form field in ConfigForm printer
+. Rewire some test-cases to swallow errors rather than expect them
+. HTMLDefinition printer updated with some of the new attributes
+. DefinitionCache keys reordered to reflect precedence: version number,
+  hash, then revision number
+. %Core.DefinitionCache renamed to %Cache.DefinitionImpl
+. Interlinking in configuration documentation added using
+  Injector_PurifierLinkify
+. Directives now keep track of aliases to themselves
+. Error collector now requires a severity to be passed, use PHP's internal
+  error constants for this
+. HTMLPurifier_Config::getAllowedDirectivesForForm implemented, allows
+  much easier selective embedding of configuration values
+. Doctype objects now accept public and system DTD identifiers
+. %HTML.Doctype is now constrained by specific values, to specify a custom
+  doctype use new %HTML.CustomDoctype
+. ConfigForm truncates long directives to keep the form small, and does
+  not re-output namespaces
+
+2.0.0, released 2007-06-20
+# Completely refactored HTMLModuleManager, decentralizing safety
+  information
+# Transform modules changed to Tidy modules, which offer more flexibility
+  and better modularization
+# Configuration object now finalizes itself when a read operation is
+  performed on it, ensuring that its internal state stays consistent.
+  To revert this behavior, you can set the $autoFinalize member variable
+  off, but it's not recommended.
+# New compact syntax for AttrDef objects that can be used to instantiate
+  new objects via make()
+# Definitions (esp. HTMLDefinition) are now cached for a significant
+  performance boost. You can disable caching by setting %Core.DefinitionCache
+  to null. You CANNOT edit raw definitions without setting the corresponding
+  DefinitionID directive (%HTML.DefinitionID for HTMLDefinition).
+# Contents between <script> tags are now completely removed if <script>
+  is not allowed
+# Prototype-declarations for Lexer removed in favor of configuration
+  determination of Lexer implementations.
+! HTML Purifier now works in PHP 4.3.2.
+! Configuration form-editing API makes tweaking HTMLPurifier_Config a
+  breeze!
+! Configuration directives that accept hashes now allow new string
+  format: key1:value1,key2:value2
+! ConfigDoc now factored into OOP design
+! All deprecated elements now natively supported
+! Implement TinyMCE styled whitelist specification format in
+  %HTML.Allowed
+! Config object gives more friendly error messages when things go wrong
+! Advanced API implemented: easy functions for creating elements (addElement)
+  and attributes (addAttribute) on HTMLDefinition
+! Add native support for required attributes
+- Deprecated and removed EnableRedundantUTF8Cleaning. It didn't even work!
+- DOMLex will not emit errors when a custom error handler that does not
+  honor error_reporting is used
+- StrictBlockquote child definition refrains from wrapping whitespace
+  in tags now.
+- Bug resulting from tag transforms to non-allowed elements fixed
+- ChildDef_Custom's regex generation has been improved, removing several
+  false positives
+. Unit test for ElementDef created, ElementDef behavior modified to
+  be more flexible
+. Added convenience functions for HTMLModule constructors
+. AttrTypes now has accessor functions that should be used instead
+  of directly manipulating info
+. TagTransform_Center deprecated in favor of generic TagTransform_Simple
+. Add extra protection in AttrDef_URI against phantom Schemes
+. Doctype object added to HTMLDefinition which describes certain aspects
+  of the operational document type
+. Lexer is now pre-emptively included, with a conditional include for the
+  PHP5 only version.
+. HTMLDefinition and CSSDefinition have a common parent class: Definition.
+. DirectLex can now track line-numbers
+. Preliminary error collector is in place, although no code actually reports
+  errors yet
+. Factor out most of ValidateAttributes to new AttrValidator class
+
+1.6.1, released 2007-05-05
+! Support for more deprecated attributes via transformations:
+  + hspace and vspace in img
+  + size and noshade in hr
+  + nowrap in td
+  + clear in br
+  + align in caption, table, img and hr
+  + type in ul, ol and li
+! DirectLex now preserves text in which a < bracket is followed by
+  a non-alphanumeric character. This means that certain emoticons
+  are now preserved.
+! %Core.RemoveInvalidImg is now operational, when set to false invalid
+  images will hang around with an empty src
+! target attribute in a tag supported, use %Attr.AllowedFrameTargets
+  to enable
+! CSS property white-space now allows nowrap (supported in all modern
+  browsers) but not others (which have spotty browser implementations)
+! XHTML 1.1 mode now sort-of works without any fatal errors, and
+  lang is now moved over to xml:lang.
+! Attribute transformation smoketest available at smoketests/attrTransform.php
+! Transformation of font's size attribute now handles super-large numbers
+- Possibly fatal bug with __autoload() fixed in module manager
+- Invert HTMLModuleManager->addModule() processing order to check
+  prefixes first and then the literal module
+- Empty strings get converted to empty arrays instead of arrays with
+  an empty string in them.
+- Merging in attribute lists now works.
+. Demo script removed: it has been added to the website's repository
+. Basic.php script modified to work out of the box
+. Refactor AttrTransform classes to reduce duplication
+. AttrTransform_TextAlign axed in favor of a more general
+  AttrTransform_EnumToCSS, refer to HTMLModule/TransformToStrict.php to
+  see how the new equivalent is implemented
+. Unit tests now use exclusively assertIdentical
+
+1.6.0, released 2007-04-01
+! Support for most common deprecated attributes via transformations:
+  + bgcolor in td, th, tr and table
+  + border in img
+  + name in a and img
+  + width in td, th and hr
+  + height in td, th
+! Support for CSS attribute 'height' added
+! Support for rel and rev attributes in a tags added, use %Attr.AllowedRel
+  and %Attr.AllowedRev to activate
+- You can define ID blacklists using regular expressions via
+  %Attr.IDBlacklistRegexp
+- Error messages are emitted when you attempt to "allow" elements or
+  attributes that HTML Purifier does not support
+- Fix segfault in unit test. The problem is not very reproduceable and
+  I don't know what causes it, but a six line patch fixed it.
+
+1.5.0, released 2007-03-23
+! Added a rudimentary I18N and L10N system modeled off MediaWiki. It
+  doesn't actually do anything yet, but keep your eyes peeled.
+! docs/enduser-utf8.html explains how to use UTF-8 and HTML Purifier
+! Newly structured HTMLDefinition modeled off of XHTML 1.1 modules.
+  I am loathe to release beta quality APIs, but this is exactly that;
+  don't use the internal interfaces if you're not willing to do migration
+  later on.
+- Allow 'x' subtag in language codes
+- Fixed buggy chameleon-support for ins and del
+. Added support for IDREF attributes (i.e. for)
+. Renamed HTMLPurifier_AttrDef_Class to HTMLPurifier_AttrDef_Nmtokens
+. Removed context variable ParentType, replaced with IsInline, which
+  is false when you're not inline and an integer of the parent that
+  caused you to become inline when you are (so possibly zero)
+. Removed ElementDef->type in favor of ElementDef->descendants_are_inline
+  and HTMLDefinition->content_sets
+. StrictBlockquote now reports what elements its supposed to allow,
+  rather than what it does allow
+. Removed HTMLDefinition->info_flow_elements in favor of
+  HTMLDefinition->content_sets['Flow']
+. Removed redundant "exclusionary" definitions from DTD roster
+. StrictBlockquote now requires a construction parameter as if it
+  were an Required ChildDef, this is the "real" set of allowed elements
+. AttrDef partitioned into HTML, CSS and URI segments
+. Modify Youtube filter regexp to be multiline
+. Require both PHP5 and DOM extension in order to use DOMLex, fixes
+  some edge cases where a DOMDocument class exists in a PHP4 environment
+  due to DOM XML extension.
+
+1.4.1, released 2007-01-21
+! docs/enduser-youtube.html updated according to new functionality
+- YouTube IDs can have underscores and dashes
+
+1.4.0, released 2007-01-21
+! Implemented list-style-image, URIs now allowed in list-style
+! Implemented background-image, background-repeat, background-attachment
+  and background-position CSS properties. Shorthand property background
+  supports all of these properties.
+! Configuration documentation looks nicer
+! Added %Core.EscapeNonASCIICharacters to workaround loss of Unicode
+  characters while %Core.Encoding is set to a non-UTF-8 encoding.
+! Support for configuration directive aliases added
+! Config object can now be instantiated from ini files
+! YouTube preservation code added to the core, with two lines of code
+  you can add it as a filter to your code. See smoketests/preserveYouTube.php
+  for sample code.
+! Moved SLOW to docs/enduser-slow.html and added code examples
+- Replaced version check with functionality check for DOM (thanks Stephen
+  Khoo)
+. Added smoketest 'all.php', which loads all other smoketests via frames
+. Implemented AttrDef_CSSURI for url(http://google.com) style declarations
+. Added convenient single test selector form on test runner
+
+1.3.2, released 2006-12-25
+! HTMLPurifier object now accepts configuration arrays, no need to manually
+  instantiate a configuration object
+! Context object now accessible to outside
+! Added enduser-youtube.html, explains how to embed YouTube videos. See
+  also corresponding smoketest preserveYouTube.php.
+! Added purifyArray(), which takes a list of HTML and purifies it all
+! Added static member variable $version to HTML Purifier with PHP-compatible
+  version number string.
+- Fixed fatal error thrown by upper-cased language attributes
+- printDefinition.php: added labels, added better clarification
+. HTMLPurifier_Config::create() added, takes mixed variable and converts into
+  a HTMLPurifier_Config object.
+
+1.3.1, released 2006-12-06
+! Added HTMLPurifier.func.php stub for a convenient function to call the library
+- Fixed bug in RemoveInvalidImg code that caused all images to be dropped
+  (thanks to .mario for reporting this)
+. Standardized all attribute handling variables to attr, made it plural
+
+1.3.0, released 2006-11-26
+# Invalid images are now removed, rather than replaced with a dud
+  <img src="" alt="Invalid image" />. Previous behavior can be restored
+  with new directive %Core.RemoveInvalidImg set to false.
+! (X)HTML Strict now supported
+  + Transparently handles inline elements in block context (blockquote)
+! Added GET method to demo for easier validation, added 50kb max input size
+! New directive %HTML.BlockWrapper, for block-ifying inline elements
+! New directive %HTML.Parent, allows you to only allow inline content
+! New directives %HTML.AllowedElements and %HTML.AllowedAttributes to let
+  users narrow the set of allowed tags
+! <li value="4"> and <ul start="2"> now allowed in loose mode
+! New directives %URI.DisableExternalResources and %URI.DisableResources
+! New directive %Attr.DisableURI, which eliminates all hyperlinking
+! New directive %URI.Munge, munges URI so you can use some sort of redirector
+  service to avoid PageRank leaks or warn users that they are exiting your site.
+! Added spiffy new smoketest printDefinition.php, which lets you twiddle with
+  the configuration settings and see how the internal rules are affected.
+! New directive %URI.HostBlacklist for blocking links to bad hosts.
+  xssAttacks.php smoketest updated accordingly.
+- Added missing type to ChildDef_Chameleon
+- Remove Tidy option from demo if there is not Tidy available
+. ChildDef_Required guards against empty tags
+. Lookup table HTMLDefinition->info_flow_elements added
+. Added peace-of-mind variable initialization to Strategy_FixNesting
+. Added HTMLPurifier->info_parent_def, parent child processing made special
+. Added internal documents briefly summarizing future progression of HTML
+. HTMLPurifier_Config->getBatch($namespace) added
+. More lenient casting to bool from string in HTMLPurifier_ConfigSchema
+. Refactored ChildDef classes into their own files
+
+1.2.0, released 2006-11-19
+# ID attributes now disabled by default. New directives:
+  + %HTML.EnableAttrID - restores old behavior by allowing IDs
+  + %Attr.IDPrefix - %Attr.IDBlacklist alternative that munges all user IDs
+    so that they don't collide with your IDs
+  + %Attr.IDPrefixLocal - Same as above, but for when there are multiple
+    instances of user content on the page
+  + Profuse documentation on how to use these available in docs/enduser-id.txt
+! Added MODx plugin <http://modxcms.com/forums/index.php/topic,6604.0.html>
+! Added percent encoding normalization
+! XSS attacks smoketest given facelift
+! Configuration documentation now has table of contents
+! Added %URI.DisableExternal, which prevents links to external websites.  You
+  can also use %URI.Host to permit absolute linking to subdomains
+! Non-accessible resources (ex. mailto) blocked from embedded URIs (img src)
+- Type variable in HTMLDefinition was not being set properly, fixed
+- Documentation updated
+  + TODO added request Phalanger
+  + TODO added request Native compression
+  + TODO added request Remove redundant tags
+  + TODO added possible plaintext formatter for HTML Purifier documentation
+  + Updated ConfigDoc TODO
+  + Improved inline comments in AttrDef/Class.php, AttrDef/CSS.php
+    and AttrDef/Host.php
+  + Revamped documentation into HTML, along with misc updates
+- HTMLPurifier_Context doesn't throw a variable reference error if you attempt
+  to retrieve a non-existent variable
+. Switched to purify()-wide Context object registry
+. Refactored unit tests to minimize duplication
+. XSS attack sheet updated
+. configdoc.xml now has xml:space attached to default value nodes
+. Allow configuration directives to permit null values
+. Cleaned up test-cases to remove unnecessary swallowErrors()
+
+1.1.2, released 2006-09-30
+! Add HTMLPurifier.auto.php stub file that configures include_path
+- Documentation updated
+  + INSTALL document rewritten
+  + TODO added semi-lossy conversion
+  + API Doxygen docs' file exclusions updated
+  + Added notes on HTML versus XML attribute whitespace handling
+  + Noted that HTMLPurifier_ChildDef_Custom isn't being used
+  + Noted that config object's definitions are cached versions
+- Fixed lack of attribute parsing in HTMLPurifier_Lexer_PEARSax3
+- ftp:// URIs now have their typecodes checked
+- Hooked up HTMLPurifier_ChildDef_Custom's unit tests (they weren't being run)
+. Line endings standardized throughout project (svn:eol-style standardized)
+. Refactored parseData() to general Lexer class
+. Tester named "HTML Purifier" not "HTMLPurifier"
+
+1.1.1, released 2006-09-24
+! Configuration option to optionally Tidy up output for indentation to make up
+  for dropped whitespace by DOMLex (pretty-printing for the entire application
+  should be done by a page-wide Tidy)
+- Various documentation updates
+- Fixed parse error in configuration documentation script
+- Fixed fatal error in benchmark scripts, slightly augmented
+- As far as possible, whitespace is preserved in-between table children
+- Sample test-settings.php file included
+
+1.1.0, released 2006-09-16
+! Directive documentation generation using XSLT
+! XHTML can now be turned off, output becomes <br>
+- Made URI validator more forgiving: will ignore leading and trailing
+  quotes, apostrophes and less than or greater than signs.
+- Enforce alphanumeric namespace and directive names for configuration.
+- Table child definition made more flexible, will fix up poorly ordered elements
+. Renamed ConfigDef to ConfigSchema
+
+1.0.1, released 2006-09-04
+- Fixed slight bug in DOMLex attribute parsing
+- Fixed rejection of case-insensitive configuration values when there is a
+  set of allowed values.  This manifested in %Core.Encoding.
+- Fixed rejection of inline style declarations that had lots of extra
+  space in them.  This manifested in TinyMCE.
+
+1.0.0, released 2006-09-01
+! Shorthand CSS properties implemented: font, border, background, list-style
+! Basic color keywords translated into hexadecimal values
+! Table CSS properties implemented
+! Support for charsets other than UTF-8 (defined by iconv)
+! Malformed UTF-8 and non-SGML character detection and cleaning implemented
+- Fixed broken numeric entity conversion
+- API documentation completed
+. (HTML|CSS)Definition de-singleton-ized
+
+1.0.0beta, released 2006-08-16
+! First public release, most functionality implemented. Notable omissions are:
+  + Shorthand CSS properties
+  + Table CSS properties
+  + Deprecated attribute transformations
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/README b/library/ezyang/htmlpurifier/README
new file mode 100644
index 0000000000..53f26f1c28
--- /dev/null
+++ b/library/ezyang/htmlpurifier/README
@@ -0,0 +1,24 @@
+
+README
+    All about HTML Purifier
+
+HTML Purifier is an HTML filtering solution that uses a unique combination
+of robust whitelists and agressive parsing to ensure that not only are
+XSS attacks thwarted, but the resulting HTML is standards compliant.
+
+HTML Purifier is oriented towards richly formatted documents from
+untrusted sources that require CSS and a full tag-set.  This library can
+be configured to accept a more restrictive set of tags, but it won't be
+as efficient as more bare-bones parsers. It will, however, do the job
+right, which may be more important.
+
+Places to go:
+
+* See INSTALL for a quick installation guide
+* See docs/ for developer-oriented documentation, code examples and
+  an in-depth installation guide.
+* See WYSIWYG for information on editors like TinyMCE and FCKeditor
+
+HTML Purifier can be found on the web at: http://htmlpurifier.org/
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/TODO b/library/ezyang/htmlpurifier/TODO
new file mode 100644
index 0000000000..a92abf2802
--- /dev/null
+++ b/library/ezyang/htmlpurifier/TODO
@@ -0,0 +1,150 @@
+
+TODO List
+
+= KEY ====================
+    # Flagship
+    - Regular
+    ? Maybe I'll Do It
+==========================
+
+If no interest is expressed for a feature that may require a considerable
+amount of effort to implement, it may get endlessly delayed. Do not be
+afraid to cast your vote for the next feature to be implemented!
+
+Things to do as soon as possible:
+
+ - http://htmlpurifier.org/phorum/read.php?3,5560,6307#msg-6307
+ - Think about allowing explicit order of operations hooks for transforms
+ - Fix "<.<" bug (trailing < is removed if not EOD)
+ - Build in better internal state dumps and debugging tools for remote
+   debugging
+ - Allowed/Allowed* have strange interactions when both set
+ ? Transform lone embeds into object tags
+ - Deprecated config options that emit warnings when you set them (with'
+   a way of muting the warning if you really want to)
+ - Make HTML.Trusted work with Output.FlashCompat
+ - HTML.Trusted and HTML.SafeObject have funny interaction; general
+   problem is what to do when a module "supersedes" another
+   (see also tables and basic tables.)  This is a little dicier
+   because HTML.SafeObject has some extra functionality that
+   trusted might find useful.  See http://htmlpurifier.org/phorum/read.php?3,5762,6100
+
+FUTURE VERSIONS
+---------------
+
+4.8 release [OMG CONFIG PONIES]
+ ! Fix Printer. It's from the old days when we didn't have decent XML classes
+ ! Factor demo.php into a set of Printer classes, and then create a stub
+   file for users here (inside the actual HTML Purifier library)
+ - Fix error handling with form construction
+ - Do encoding validation in Printers, or at least, where user data comes in
+ - Config: Add examples to everything (make built-in which also automatically
+   gives output)
+ - Add "register" field to config schemas to eliminate dependence on
+   naming conventions (try to remember why we ultimately decided on tihs)
+
+5.0 release [HTML 5]
+ # Swap out code to use html5lib tokenizer and tree-builder
+ ! Allow turning off of FixNesting and required attribute insertion
+
+5.1 release [It's All About Trust] (floating)
+ # Implement untrusted, dangerous elements/attributes
+ # Implement IDREF support (harder than it seems, since you cannot have
+   IDREFs to non-existent IDs)
+     - Implement <area> (client and server side image maps are blocking
+       on IDREF support)
+ # Frameset XHTML 1.0 and HTML 4.01 doctypes
+ - Figure out how to simultaneously set %CSS.Trusted and %HTML.Trusted (?)
+
+5.2 release [Error'ed]
+ # Error logging for filtering/cleanup procedures
+ # Additional support for poorly written HTML
+    - Microsoft Word HTML cleaning (i.e. MsoNormal, but research essential!)
+    - Friendly strict handling of <address> (block -> <br>)
+ - XSS-attempt detection--certain errors are flagged XSS-like
+ - Append something to duplicate IDs so they're still usable (impl. note: the
+   dupe detector would also need to detect the suffix as well)
+
+6.0 release [Beyond HTML]
+ # Legit token based CSS parsing (will require revamping almost every
+   AttrDef class). Probably will use CSSTidy
+ # More control over allowed CSS properties using a modularization
+ # IRI support (this includes IDN)
+ - Standardize token armor for all areas of processing
+
+7.0 release [To XML and Beyond]
+ - Extended HTML capabilities based on namespacing and tag transforms (COMPLEX)
+    - Hooks for adding custom processors to custom namespaced tags and
+      attributes, offer default implementation
+    - Lots of documentation and samples
+
+Ongoing
+ - More refactoring to take advantage of PHP5's facilities
+ - Refactor unit tests into lots of test methods
+ - Plugins for major CMSes (COMPLEX)
+    - phpBB
+    - Also, a FAQ for extension writers with HTML Purifier
+
+AutoFormat
+ - Smileys
+ - Syntax highlighting (with GeSHi) with <pre> and possibly <?php
+ - Look at http://drupal.org/project/Modules/category/63 for ideas
+
+Neat feature related
+ ! Support exporting configuration, so users can easily tweak settings
+   in the demo, and then copy-paste into their own setup
+ - Advanced URI filtering schemes (see docs/proposal-new-directives.txt)
+ - Allow scoped="scoped" attribute in <style> tags; may be troublesome
+   because regular CSS has no way of uniquely identifying nodes, so we'd
+   have to generate IDs
+ - Explain how to use HTML Purifier in non-PHP languages / create
+   a simple command line stub (or complicated?)
+ - Fixes for Firefox's inability to handle COL alignment props (Bug 915)
+ - Automatically add non-breaking spaces to empty table cells when
+   empty-cells:show is applied to have compatibility with Internet Explorer
+ - Table of Contents generation (XHTML Compiler might be reusable). May also
+   be out-of-band information.
+ - Full set of color keywords. Also, a way to add onto them without
+   finalizing the configuration object.
+ - Write a var_export and memcached DefinitionCache - Denis
+ - Built-in support for target="_blank" on all external links
+ - Convert RTL/LTR override characters to <bdo> tags, or vice versa on demand.
+   Also, enable disabling of directionality
+ ? Externalize inline CSS to promote clean HTML, proposed by Sander Tekelenburg
+ ? Remove redundant tags, ex. <u><u>Underlined</u></u>. Implementation notes:
+    1. Analyzing which tags to remove duplicants
+    2. Ensure attributes are merged into the parent tag
+    3. Extend the tag exclusion system to specify whether or not the
+    contents should be dropped or not (currently, there's code that could do
+    something like this if it didn't drop the inner text too.)
+ ? Make AutoParagraph also support paragraph-izing double <br> tags, and not
+   just double newlines.  This is kind of tough to do in the current framework,
+   though, and might be reasonably approximated by search replacing double <br>s
+   with newlines before running it through HTML Purifier.
+
+Maintenance related (slightly boring)
+ # CHMOD install script for PEAR installs
+ ! Factor out command line parser into its own class, and unit test it
+ - Reduce size of internal data-structures (esp. HTMLDefinition)
+ - Allow merging configurations.  Thus,
+        a -> b -> default
+        c -> d -> default
+   becomes
+        a -> b -> c -> d -> default
+   Maybe allow more fine-grained tuning of this behavior. Alternatively,
+   encourage people to use short plist depths before building them up.
+ - Time PHPT tests
+
+ChildDef related (very boring)
+ - Abstract ChildDef_BlockQuote to work with all elements that only
+   allow blocks in them, required or optional
+ - Implement lenient <ruby> child validation
+
+Wontfix
+ - Non-lossy smart alternate character encoding transformations (unless
+   patch provided)
+ - Pretty-printing HTML: users can use Tidy on the output on entire page
+ - Native content compression, whitespace stripping: use gzip if this is
+   really important
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/VERSION b/library/ezyang/htmlpurifier/VERSION
new file mode 100644
index 0000000000..1163055e28
--- /dev/null
+++ b/library/ezyang/htmlpurifier/VERSION
@@ -0,0 +1 @@
+4.7.0
\ No newline at end of file
diff --git a/library/ezyang/htmlpurifier/WHATSNEW b/library/ezyang/htmlpurifier/WHATSNEW
new file mode 100644
index 0000000000..4e5eb2b691
--- /dev/null
+++ b/library/ezyang/htmlpurifier/WHATSNEW
@@ -0,0 +1,4 @@
+HTML Purifier 4.7.0 is a bugfix release, collecting two years
+worth of accumulated bug fixes.  Highlighted bugfixes are updated
+YouTube filter code, corrected rgb() CSS parsing, and one new
+configuration option, %AutoFormat.RemoveEmpty.Predicate.
diff --git a/library/ezyang/htmlpurifier/WYSIWYG b/library/ezyang/htmlpurifier/WYSIWYG
new file mode 100644
index 0000000000..c518aacdd9
--- /dev/null
+++ b/library/ezyang/htmlpurifier/WYSIWYG
@@ -0,0 +1,20 @@
+
+WYSIWYG - What You See Is What You Get
+    HTML Purifier: A Pretty Good Fit for TinyMCE and FCKeditor
+
+Javascript-based WYSIWYG editors, simply stated, are quite amazing.  But I've
+always been wary about using them due to security issues: they handle the
+client-side magic, but once you've been served a piping hot load of unfiltered
+HTML, what should be done then?  In some situations, you can serve it uncleaned,
+since you only offer these facilities to trusted(?) authors.
+
+Unfortunantely, for blog comments and anonymous input, BBCode, Textile and
+other markup languages still reign supreme.  Put simply: filtering HTML is
+hard work, and these WYSIWYG authors don't offer anything to alleviate that
+trouble.  Therein lies the solution:
+
+HTML Purifier is perfect for filtering pure-HTML input from WYSIWYG editors.
+
+Enough said.
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/composer.json b/library/ezyang/htmlpurifier/composer.json
new file mode 100644
index 0000000000..2f59d0fede
--- /dev/null
+++ b/library/ezyang/htmlpurifier/composer.json
@@ -0,0 +1,22 @@
+{
+    "name": "ezyang/htmlpurifier",
+    "description": "Standards compliant HTML filter written in PHP",
+    "type": "library",
+    "keywords": ["html"],
+    "homepage": "http://htmlpurifier.org/",
+    "license": "LGPL",
+    "authors": [
+        {
+            "name": "Edward Z. Yang",
+            "email": "admin@htmlpurifier.org",
+            "homepage": "http://ezyang.com"
+        }
+    ],
+    "require": {
+        "php": ">=5.2"
+    },
+    "autoload": {
+        "psr-0": { "HTMLPurifier": "library/" },
+        "files": ["library/HTMLPurifier.composer.php"]
+    }
+}
diff --git a/library/ezyang/htmlpurifier/extras/ConfigDoc/HTMLXSLTProcessor.php b/library/ezyang/htmlpurifier/extras/ConfigDoc/HTMLXSLTProcessor.php
new file mode 100644
index 0000000000..1cfec5d762
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/ConfigDoc/HTMLXSLTProcessor.php
@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * Decorator/extender XSLT processor specifically for HTML documents.
+ */
+class ConfigDoc_HTMLXSLTProcessor
+{
+
+    /**
+     * Instance of XSLTProcessor
+     */
+    protected $xsltProcessor;
+
+    public function __construct($proc = false)
+    {
+        if ($proc === false) $proc = new XSLTProcessor();
+        $this->xsltProcessor = $proc;
+    }
+
+    /**
+     * @note Allows a string $xsl filename to be passed
+     */
+    public function importStylesheet($xsl)
+    {
+        if (is_string($xsl)) {
+            $xsl_file = $xsl;
+            $xsl = new DOMDocument();
+            $xsl->load($xsl_file);
+        }
+        return $this->xsltProcessor->importStylesheet($xsl);
+    }
+
+    /**
+     * Transforms an XML file into compatible XHTML based on the stylesheet
+     * @param $xml XML DOM tree, or string filename
+     * @return string HTML output
+     * @todo Rename to transformToXHTML, as transformToHTML is misleading
+     */
+    public function transformToHTML($xml)
+    {
+        if (is_string($xml)) {
+            $dom = new DOMDocument();
+            $dom->load($xml);
+        } else {
+            $dom = $xml;
+        }
+        $out = $this->xsltProcessor->transformToXML($dom);
+
+        // fudges for HTML backwards compatibility
+        // assumes that document is XHTML
+        $out = str_replace('/>', ' />', $out); // <br /> not <br/>
+        $out = str_replace(' xmlns=""', '', $out); // rm unnecessary xmlns
+
+        if (class_exists('Tidy')) {
+            // cleanup output
+            $config = array(
+                'indent'        => true,
+                'output-xhtml'  => true,
+                'wrap'          => 80
+            );
+            $tidy = new Tidy;
+            $tidy->parseString($out, $config, 'utf8');
+            $tidy->cleanRepair();
+            $out = (string) $tidy;
+        }
+
+        return $out;
+    }
+
+    /**
+     * Bulk sets parameters for the XSL stylesheet
+     * @param array $options Associative array of options to set
+     */
+    public function setParameters($options)
+    {
+        foreach ($options as $name => $value) {
+            $this->xsltProcessor->setParameter('', $name, $value);
+        }
+    }
+
+    /**
+     * Forward any other calls to the XSLT processor
+     */
+    public function __call($name, $arguments)
+    {
+        call_user_func_array(array($this->xsltProcessor, $name), $arguments);
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/FSTools.php b/library/ezyang/htmlpurifier/extras/FSTools.php
new file mode 100644
index 0000000000..ce00763166
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/FSTools.php
@@ -0,0 +1,164 @@
+<?php
+
+/**
+ * Filesystem tools not provided by default; can recursively create, copy
+ * and delete folders. Some template methods are provided for extensibility.
+ *
+ * @note This class must be instantiated to be used, although it does
+ *       not maintain state.
+ */
+class FSTools
+{
+
+    private static $singleton;
+
+    /**
+     * Returns a global instance of FSTools
+     */
+    public static function singleton()
+    {
+        if (empty(FSTools::$singleton)) FSTools::$singleton = new FSTools();
+        return FSTools::$singleton;
+    }
+
+    /**
+     * Sets our global singleton to something else; useful for overloading
+     * functions.
+     */
+    public static function setSingleton($singleton)
+    {
+        FSTools::$singleton = $singleton;
+    }
+
+    /**
+     * Recursively creates a directory
+     * @param string $folder Name of folder to create
+     * @note Adapted from the PHP manual comment 76612
+     */
+    public function mkdirr($folder)
+    {
+        $folders = preg_split("#[\\\\/]#", $folder);
+        $base = '';
+        for($i = 0, $c = count($folders); $i < $c; $i++) {
+            if(empty($folders[$i])) {
+                if (!$i) {
+                    // special case for root level
+                    $base .= DIRECTORY_SEPARATOR;
+                }
+                continue;
+            }
+            $base .= $folders[$i];
+            if(!is_dir($base)){
+                $this->mkdir($base);
+            }
+            $base .= DIRECTORY_SEPARATOR;
+        }
+    }
+
+    /**
+     * Copy a file, or recursively copy a folder and its contents; modified
+     * so that copied files, if PHP, have includes removed
+     * @note Adapted from http://aidanlister.com/repos/v/function.copyr.php
+     */
+    public function copyr($source, $dest)
+    {
+        // Simple copy for a file
+        if (is_file($source)) {
+            return $this->copy($source, $dest);
+        }
+        // Make destination directory
+        if (!is_dir($dest)) {
+            $this->mkdir($dest);
+        }
+        // Loop through the folder
+        $dir = $this->dir($source);
+        while ( false !== ($entry = $dir->read()) ) {
+            // Skip pointers
+            if ($entry == '.' || $entry == '..') {
+                continue;
+            }
+            if (!$this->copyable($entry)) {
+                continue;
+            }
+            // Deep copy directories
+            if ($dest !== "$source/$entry") {
+                $this->copyr("$source/$entry", "$dest/$entry");
+            }
+        }
+        // Clean up
+        $dir->close();
+        return true;
+    }
+
+    /**
+     * Overloadable function that tests a filename for copyability. By
+     * default, everything should be copied; you can restrict things to
+     * ignore hidden files, unreadable files, etc. This function
+     * applies to copyr().
+     */
+    public function copyable($file)
+    {
+        return true;
+    }
+
+    /**
+     * Delete a file, or a folder and its contents
+     * @note Adapted from http://aidanlister.com/repos/v/function.rmdirr.php
+     */
+    public function rmdirr($dirname)
+    {
+        // Sanity check
+        if (!$this->file_exists($dirname)) {
+            return false;
+        }
+
+        // Simple delete for a file
+        if ($this->is_file($dirname) || $this->is_link($dirname)) {
+            return $this->unlink($dirname);
+        }
+
+        // Loop through the folder
+        $dir = $this->dir($dirname);
+        while (false !== $entry = $dir->read()) {
+            // Skip pointers
+            if ($entry == '.' || $entry == '..') {
+                continue;
+            }
+            // Recurse
+            $this->rmdirr($dirname . DIRECTORY_SEPARATOR . $entry);
+        }
+
+        // Clean up
+        $dir->close();
+        return $this->rmdir($dirname);
+    }
+
+    /**
+     * Recursively globs a directory.
+     */
+    public function globr($dir, $pattern, $flags = NULL)
+    {
+        $files = $this->glob("$dir/$pattern", $flags);
+        if ($files === false) $files = array();
+        $sub_dirs = $this->glob("$dir/*", GLOB_ONLYDIR);
+        if ($sub_dirs === false) $sub_dirs = array();
+        foreach ($sub_dirs as $sub_dir) {
+            $sub_files = $this->globr($sub_dir, $pattern, $flags);
+            $files = array_merge($files, $sub_files);
+        }
+        return $files;
+    }
+
+    /**
+     * Allows for PHP functions to be called and be stubbed.
+     * @warning This function will not work for functions that need
+     *      to pass references; manually define a stub function for those.
+     */
+    public function __call($name, $args)
+    {
+        return call_user_func_array($name, $args);
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/FSTools/File.php b/library/ezyang/htmlpurifier/extras/FSTools/File.php
new file mode 100644
index 0000000000..6453a7a450
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/FSTools/File.php
@@ -0,0 +1,141 @@
+<?php
+
+/**
+ * Represents a file in the filesystem
+ *
+ * @warning Be sure to distinguish between get() and write() versus
+ *      read() and put(), the former operates on the entire file, while
+ *      the latter operates on a handle.
+ */
+class FSTools_File
+{
+
+    /** Filename of file this object represents */
+    protected $name;
+
+    /** Handle for the file */
+    protected $handle = false;
+
+    /** Instance of FSTools for interfacing with filesystem */
+    protected $fs;
+
+    /**
+     * Filename of file you wish to instantiate.
+     * @note This file need not exist
+     */
+    public function __construct($name, $fs = false)
+    {
+        $this->name = $name;
+        $this->fs = $fs ? $fs : FSTools::singleton();
+    }
+
+    /** Returns the filename of the file. */
+    public function getName() {return $this->name;}
+
+    /** Returns directory of the file without trailing slash */
+    public function getDirectory() {return $this->fs->dirname($this->name);}
+
+    /**
+     * Retrieves the contents of a file
+     * @todo Throw an exception if file doesn't exist
+     */
+    public function get()
+    {
+        return $this->fs->file_get_contents($this->name);
+    }
+
+    /** Writes contents to a file, creates new file if necessary */
+    public function write($contents)
+    {
+        return $this->fs->file_put_contents($this->name, $contents);
+    }
+
+    /** Deletes the file */
+    public function delete()
+    {
+        return $this->fs->unlink($this->name);
+    }
+
+    /** Returns true if file exists and is a file. */
+    public function exists()
+    {
+        return $this->fs->is_file($this->name);
+    }
+
+    /** Returns last file modification time */
+    public function getMTime()
+    {
+        return $this->fs->filemtime($this->name);
+    }
+
+    /**
+     * Chmod a file
+     * @note We ignore errors because of some weird owner trickery due
+     *       to SVN duality
+     */
+    public function chmod($octal_code)
+    {
+        return @$this->fs->chmod($this->name, $octal_code);
+    }
+
+    /** Opens file's handle */
+    public function open($mode)
+    {
+        if ($this->handle) $this->close();
+        $this->handle = $this->fs->fopen($this->name, $mode);
+        return true;
+    }
+
+    /** Closes file's handle */
+    public function close()
+    {
+        if (!$this->handle) return false;
+        $status = $this->fs->fclose($this->handle);
+        $this->handle = false;
+        return $status;
+    }
+
+    /** Retrieves a line from an open file, with optional max length $length */
+    public function getLine($length = null)
+    {
+        if (!$this->handle) $this->open('r');
+        if ($length === null) return $this->fs->fgets($this->handle);
+        else return $this->fs->fgets($this->handle, $length);
+    }
+
+    /** Retrieves a character from an open file */
+    public function getChar()
+    {
+        if (!$this->handle) $this->open('r');
+        return $this->fs->fgetc($this->handle);
+    }
+
+    /** Retrieves an $length bytes of data from an open data */
+    public function read($length)
+    {
+        if (!$this->handle) $this->open('r');
+        return $this->fs->fread($this->handle, $length);
+    }
+
+    /** Writes to an open file */
+    public function put($string)
+    {
+        if (!$this->handle) $this->open('a');
+        return $this->fs->fwrite($this->handle, $string);
+    }
+
+    /** Returns TRUE if the end of the file has been reached */
+    public function eof()
+    {
+        if (!$this->handle) return true;
+        return $this->fs->feof($this->handle);
+    }
+
+    public function __destruct()
+    {
+        if ($this->handle) $this->close();
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.auto.php b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.auto.php
new file mode 100644
index 0000000000..4016d8afd1
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.auto.php
@@ -0,0 +1,11 @@
+<?php
+
+/**
+ * This is a stub include that automatically configures the include path.
+ */
+
+set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
+require_once 'HTMLPurifierExtras.php';
+require_once 'HTMLPurifierExtras.autoload.php';
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.autoload.php b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.autoload.php
new file mode 100644
index 0000000000..de4a8aaafe
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.autoload.php
@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * @file
+ * Convenience file that registers autoload handler for HTML Purifier.
+ *
+ * @warning
+ *      This autoloader does not contain the compatibility code seen in
+ *      HTMLPurifier_Bootstrap; the user is expected to make any necessary
+ *      changes to use this library.
+ */
+
+if (function_exists('spl_autoload_register')) {
+    spl_autoload_register(array('HTMLPurifierExtras', 'autoload'));
+    if (function_exists('__autoload')) {
+        // Be polite and ensure that userland autoload gets retained
+        spl_autoload_register('__autoload');
+    }
+} elseif (!function_exists('__autoload')) {
+    function __autoload($class)
+    {
+        return HTMLPurifierExtras::autoload($class);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.php b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.php
new file mode 100644
index 0000000000..35c2ca7e72
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/HTMLPurifierExtras.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * Meta-class for HTML Purifier's extra class hierarchies, similar to
+ * HTMLPurifier_Bootstrap.
+ */
+class HTMLPurifierExtras
+{
+
+    public static function autoload($class)
+    {
+        $path = HTMLPurifierExtras::getPath($class);
+        if (!$path) return false;
+        require $path;
+        return true;
+    }
+
+    public static function getPath($class)
+    {
+        if (
+            strncmp('FSTools', $class, 7) !== 0 &&
+            strncmp('ConfigDoc', $class, 9) !== 0
+        ) return false;
+        // Custom implementations can go here
+        // Standard implementation:
+        return str_replace('_', '/', $class) . '.php';
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/extras/README b/library/ezyang/htmlpurifier/extras/README
new file mode 100644
index 0000000000..4bfece79ea
--- /dev/null
+++ b/library/ezyang/htmlpurifier/extras/README
@@ -0,0 +1,32 @@
+
+HTML Purifier Extras
+    The Method Behind The Madness!
+
+The extras/ folder in HTML Purifier contains--you guessed it--extra things
+for HTML Purifier.  Specifically, these are two extra libraries called
+FSTools and ConfigSchema.  They're extra for a reason: you don't need them
+if you're using HTML Purifier for normal usage: filtering HTML.  However,
+if you're a developer, and would like to test HTML Purifier, or need to
+use one of HTML Purifier's maintenance scripts, chances are they'll need
+these libraries. Who knows: maybe you'll find them useful too!
+
+Here are the libraries:
+
+
+FSTools
+-------
+
+Short for File System Tools, this is a poor-man's object-oriented wrapper for
+the filesystem. It currently consists of two classes:
+
+- FSTools: This is a singleton that contains a manner of useful functions
+  such as recursive glob, directory removal, etc, as well as the ability
+  to call arbitrary native PHP functions through it like $FS->fopen(...).
+  This makes it a lot simpler to mock these filesystem calls for unit testing.
+
+- FSTools_File: This object represents a single file, and has almost any
+  method imaginable one would need.
+
+Check the files themselves for more information.
+
+    vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier.auto.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.auto.php
similarity index 100%
rename from library/HTMLPurifier.auto.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.auto.php
diff --git a/library/HTMLPurifier.autoload.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.autoload.php
similarity index 70%
rename from library/HTMLPurifier.autoload.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.autoload.php
index 8d40176406..c3ea67e814 100644
--- a/library/HTMLPurifier.autoload.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.autoload.php
@@ -3,6 +3,7 @@
 /**
  * @file
  * Convenience file that registers autoload handler for HTML Purifier.
+ * It also does some sanity checks.
  */
 
 if (function_exists('spl_autoload_register') && function_exists('spl_autoload_unregister')) {
@@ -13,9 +14,14 @@ if (function_exists('spl_autoload_register') && function_exists('spl_autoload_un
         spl_autoload_register('__autoload');
     }
 } elseif (!function_exists('__autoload')) {
-    function __autoload($class) {
+    function __autoload($class)
+    {
         return HTMLPurifier_Bootstrap::autoload($class);
     }
 }
 
+if (ini_get('zend.ze1_compatibility_mode')) {
+    trigger_error("HTML Purifier is not compatible with zend.ze1_compatibility_mode; please turn it off", E_USER_ERROR);
+}
+
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier.composer.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.composer.php
new file mode 100644
index 0000000000..52acc56b0d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.composer.php
@@ -0,0 +1,4 @@
+<?php
+if (!defined('HTMLPURIFIER_PREFIX')) {
+    define('HTMLPURIFIER_PREFIX', dirname(__FILE__));
+}
diff --git a/library/HTMLPurifier.func.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.func.php
similarity index 67%
rename from library/HTMLPurifier.func.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.func.php
index 56a55b2fed..64b140bec2 100644
--- a/library/HTMLPurifier.func.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.func.php
@@ -8,11 +8,13 @@
 
 /**
  * Purify HTML.
- * @param $html String HTML to purify
- * @param $config Configuration to use, can be any value accepted by
+ * @param string $html String HTML to purify
+ * @param mixed $config Configuration to use, can be any value accepted by
  *        HTMLPurifier_Config::create()
+ * @return string
  */
-function HTMLPurifier($html, $config = null) {
+function HTMLPurifier($html, $config = null)
+{
     static $purifier = false;
     if (!$purifier) {
         $purifier = new HTMLPurifier();
diff --git a/library/HTMLPurifier.includes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.includes.php
similarity index 91%
rename from library/HTMLPurifier.includes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.includes.php
index 2ed0f0c17f..fdb58c2d37 100644
--- a/library/HTMLPurifier.includes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.includes.php
@@ -7,7 +7,7 @@
  * primary concern and you are using an opcode cache. PLEASE DO NOT EDIT THIS
  * FILE, changes will be overwritten the next time the script is run.
  *
- * @version 4.1.1
+ * @version 4.7.0
  *
  * @warning
  *      You must *not* include any other HTML Purifier files before this file,
@@ -19,6 +19,7 @@
  */
 
 require 'HTMLPurifier.php';
+require 'HTMLPurifier/Arborize.php';
 require 'HTMLPurifier/AttrCollections.php';
 require 'HTMLPurifier/AttrDef.php';
 require 'HTMLPurifier/AttrTransform.php';
@@ -54,9 +55,11 @@ require 'HTMLPurifier/Language.php';
 require 'HTMLPurifier/LanguageFactory.php';
 require 'HTMLPurifier/Length.php';
 require 'HTMLPurifier/Lexer.php';
+require 'HTMLPurifier/Node.php';
 require 'HTMLPurifier/PercentEncoder.php';
 require 'HTMLPurifier/PropertyList.php';
 require 'HTMLPurifier/PropertyListIterator.php';
+require 'HTMLPurifier/Queue.php';
 require 'HTMLPurifier/Strategy.php';
 require 'HTMLPurifier/StringHash.php';
 require 'HTMLPurifier/StringHashParser.php';
@@ -72,7 +75,9 @@ require 'HTMLPurifier/URISchemeRegistry.php';
 require 'HTMLPurifier/UnitConverter.php';
 require 'HTMLPurifier/VarParser.php';
 require 'HTMLPurifier/VarParserException.php';
+require 'HTMLPurifier/Zipper.php';
 require 'HTMLPurifier/AttrDef/CSS.php';
+require 'HTMLPurifier/AttrDef/Clone.php';
 require 'HTMLPurifier/AttrDef/Enum.php';
 require 'HTMLPurifier/AttrDef/Integer.php';
 require 'HTMLPurifier/AttrDef/Lang.php';
@@ -90,6 +95,7 @@ require 'HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
 require 'HTMLPurifier/AttrDef/CSS/Filter.php';
 require 'HTMLPurifier/AttrDef/CSS/Font.php';
 require 'HTMLPurifier/AttrDef/CSS/FontFamily.php';
+require 'HTMLPurifier/AttrDef/CSS/Ident.php';
 require 'HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
 require 'HTMLPurifier/AttrDef/CSS/Length.php';
 require 'HTMLPurifier/AttrDef/CSS/ListStyle.php';
@@ -125,14 +131,17 @@ require 'HTMLPurifier/AttrTransform/Lang.php';
 require 'HTMLPurifier/AttrTransform/Length.php';
 require 'HTMLPurifier/AttrTransform/Name.php';
 require 'HTMLPurifier/AttrTransform/NameSync.php';
+require 'HTMLPurifier/AttrTransform/Nofollow.php';
 require 'HTMLPurifier/AttrTransform/SafeEmbed.php';
 require 'HTMLPurifier/AttrTransform/SafeObject.php';
 require 'HTMLPurifier/AttrTransform/SafeParam.php';
 require 'HTMLPurifier/AttrTransform/ScriptRequired.php';
+require 'HTMLPurifier/AttrTransform/TargetBlank.php';
 require 'HTMLPurifier/AttrTransform/Textarea.php';
 require 'HTMLPurifier/ChildDef/Chameleon.php';
 require 'HTMLPurifier/ChildDef/Custom.php';
 require 'HTMLPurifier/ChildDef/Empty.php';
+require 'HTMLPurifier/ChildDef/List.php';
 require 'HTMLPurifier/ChildDef/Required.php';
 require 'HTMLPurifier/ChildDef/Optional.php';
 require 'HTMLPurifier/ChildDef/StrictBlockquote.php';
@@ -147,10 +156,12 @@ require 'HTMLPurifier/HTMLModule/CommonAttributes.php';
 require 'HTMLPurifier/HTMLModule/Edit.php';
 require 'HTMLPurifier/HTMLModule/Forms.php';
 require 'HTMLPurifier/HTMLModule/Hypertext.php';
+require 'HTMLPurifier/HTMLModule/Iframe.php';
 require 'HTMLPurifier/HTMLModule/Image.php';
 require 'HTMLPurifier/HTMLModule/Legacy.php';
 require 'HTMLPurifier/HTMLModule/List.php';
 require 'HTMLPurifier/HTMLModule/Name.php';
+require 'HTMLPurifier/HTMLModule/Nofollow.php';
 require 'HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
 require 'HTMLPurifier/HTMLModule/Object.php';
 require 'HTMLPurifier/HTMLModule/Presentation.php';
@@ -158,10 +169,12 @@ require 'HTMLPurifier/HTMLModule/Proprietary.php';
 require 'HTMLPurifier/HTMLModule/Ruby.php';
 require 'HTMLPurifier/HTMLModule/SafeEmbed.php';
 require 'HTMLPurifier/HTMLModule/SafeObject.php';
+require 'HTMLPurifier/HTMLModule/SafeScripting.php';
 require 'HTMLPurifier/HTMLModule/Scripting.php';
 require 'HTMLPurifier/HTMLModule/StyleAttribute.php';
 require 'HTMLPurifier/HTMLModule/Tables.php';
 require 'HTMLPurifier/HTMLModule/Target.php';
+require 'HTMLPurifier/HTMLModule/TargetBlank.php';
 require 'HTMLPurifier/HTMLModule/Text.php';
 require 'HTMLPurifier/HTMLModule/Tidy.php';
 require 'HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
@@ -180,6 +193,9 @@ require 'HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php';
 require 'HTMLPurifier/Injector/SafeObject.php';
 require 'HTMLPurifier/Lexer/DOMLex.php';
 require 'HTMLPurifier/Lexer/DirectLex.php';
+require 'HTMLPurifier/Node/Comment.php';
+require 'HTMLPurifier/Node/Element.php';
+require 'HTMLPurifier/Node/Text.php';
 require 'HTMLPurifier/Strategy/Composite.php';
 require 'HTMLPurifier/Strategy/Core.php';
 require 'HTMLPurifier/Strategy/FixNesting.php';
@@ -196,10 +212,13 @@ require 'HTMLPurifier/Token/Start.php';
 require 'HTMLPurifier/Token/Text.php';
 require 'HTMLPurifier/URIFilter/DisableExternal.php';
 require 'HTMLPurifier/URIFilter/DisableExternalResources.php';
+require 'HTMLPurifier/URIFilter/DisableResources.php';
 require 'HTMLPurifier/URIFilter/HostBlacklist.php';
 require 'HTMLPurifier/URIFilter/MakeAbsolute.php';
 require 'HTMLPurifier/URIFilter/Munge.php';
+require 'HTMLPurifier/URIFilter/SafeIframe.php';
 require 'HTMLPurifier/URIScheme/data.php';
+require 'HTMLPurifier/URIScheme/file.php';
 require 'HTMLPurifier/URIScheme/ftp.php';
 require 'HTMLPurifier/URIScheme/http.php';
 require 'HTMLPurifier/URIScheme/https.php';
diff --git a/library/HTMLPurifier.kses.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.kses.php
similarity index 96%
rename from library/HTMLPurifier.kses.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.kses.php
index 3143feb17f..752290077f 100644
--- a/library/HTMLPurifier.kses.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.kses.php
@@ -7,7 +7,8 @@
 
 require_once dirname(__FILE__) . '/HTMLPurifier.auto.php';
 
-function kses($string, $allowed_html, $allowed_protocols = null) {
+function kses($string, $allowed_html, $allowed_protocols = null)
+{
     $config = HTMLPurifier_Config::createDefault();
     $allowed_elements = array();
     $allowed_attributes = array();
@@ -19,7 +20,6 @@ function kses($string, $allowed_html, $allowed_protocols = null) {
     }
     $config->set('HTML.AllowedElements', $allowed_elements);
     $config->set('HTML.AllowedAttributes', $allowed_attributes);
-    $allowed_schemes = array();
     if ($allowed_protocols !== null) {
         $config->set('URI.AllowedSchemes', $allowed_protocols);
     }
diff --git a/library/HTMLPurifier.path.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.path.php
similarity index 100%
rename from library/HTMLPurifier.path.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.path.php
diff --git a/library/HTMLPurifier.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.php
similarity index 66%
rename from library/HTMLPurifier.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.php
index ba2c7b3067..c6041bc113 100644
--- a/library/HTMLPurifier.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.php
@@ -19,7 +19,7 @@
  */
 
 /*
-    HTML Purifier 4.1.1 - Standards Compliant HTML Filtering
+    HTML Purifier 4.7.0 - Standards Compliant HTML Filtering
     Copyright (C) 2006-2008 Edward Z. Yang
 
     This library is free software; you can redistribute it and/or
@@ -54,66 +54,97 @@
 class HTMLPurifier
 {
 
-    /** Version of HTML Purifier */
-    public $version = '4.1.1';
-
-    /** Constant with version of HTML Purifier */
-    const VERSION = '4.1.1';
-
-    /** Global configuration object */
-    public $config;
-
-    /** Array of extra HTMLPurifier_Filter objects to run on HTML, for backwards compatibility */
-    private $filters = array();
-
-    /** Single instance of HTML Purifier */
-    private static $instance;
-
-    protected $strategy, $generator;
+    /**
+     * Version of HTML Purifier.
+     * @type string
+     */
+    public $version = '4.7.0';
 
     /**
-     * Resultant HTMLPurifier_Context of last run purification. Is an array
-     * of contexts if the last called method was purifyArray().
+     * Constant with version of HTML Purifier.
+     */
+    const VERSION = '4.7.0';
+
+    /**
+     * Global configuration object.
+     * @type HTMLPurifier_Config
+     */
+    public $config;
+
+    /**
+     * Array of extra filter objects to run on HTML,
+     * for backwards compatibility.
+     * @type HTMLPurifier_Filter[]
+     */
+    private $filters = array();
+
+    /**
+     * Single instance of HTML Purifier.
+     * @type HTMLPurifier
+     */
+    private static $instance;
+
+    /**
+     * @type HTMLPurifier_Strategy_Core
+     */
+    protected $strategy;
+
+    /**
+     * @type HTMLPurifier_Generator
+     */
+    protected $generator;
+
+    /**
+     * Resultant context of last run purification.
+     * Is an array of contexts if the last called method was purifyArray().
+     * @type HTMLPurifier_Context
      */
     public $context;
 
     /**
      * Initializes the purifier.
-     * @param $config Optional HTMLPurifier_Config object for all instances of
-     *                the purifier, if omitted, a default configuration is
-     *                supplied (which can be overridden on a per-use basis).
+     *
+     * @param HTMLPurifier_Config $config Optional HTMLPurifier_Config object
+     *                for all instances of the purifier, if omitted, a default
+     *                configuration is supplied (which can be overridden on a
+     *                per-use basis).
      *                The parameter can also be any type that
      *                HTMLPurifier_Config::create() supports.
      */
-    public function __construct($config = null) {
-
+    public function __construct($config = null)
+    {
         $this->config = HTMLPurifier_Config::create($config);
-
-        $this->strategy     = new HTMLPurifier_Strategy_Core();
-
+        $this->strategy = new HTMLPurifier_Strategy_Core();
     }
 
     /**
      * Adds a filter to process the output. First come first serve
-     * @param $filter HTMLPurifier_Filter object
+     *
+     * @param HTMLPurifier_Filter $filter HTMLPurifier_Filter object
      */
-    public function addFilter($filter) {
-        trigger_error('HTMLPurifier->addFilter() is deprecated, use configuration directives in the Filter namespace or Filter.Custom', E_USER_WARNING);
+    public function addFilter($filter)
+    {
+        trigger_error(
+            'HTMLPurifier->addFilter() is deprecated, use configuration directives' .
+            ' in the Filter namespace or Filter.Custom',
+            E_USER_WARNING
+        );
         $this->filters[] = $filter;
     }
 
     /**
      * Filters an HTML snippet/document to be XSS-free and standards-compliant.
      *
-     * @param $html String of HTML to purify
-     * @param $config HTMLPurifier_Config object for this operation, if omitted,
-     *                defaults to the config object specified during this
+     * @param string $html String of HTML to purify
+     * @param HTMLPurifier_Config $config Config object for this operation,
+     *                if omitted, defaults to the config object specified during this
      *                object's construction. The parameter can also be any type
      *                that HTMLPurifier_Config::create() supports.
-     * @return Purified HTML
+     *
+     * @return string Purified HTML
      */
-    public function purify($html, $config = null) {
-
+    public function purify($html, $config = null)
+    {
         // :TODO: make the config merge in, instead of replace
         $config = $config ? HTMLPurifier_Config::create($config) : $this->config;
 
@@ -151,8 +182,12 @@ class HTMLPurifier
         unset($filter_flags['Custom']);
         $filters = array();
         foreach ($filter_flags as $filter => $flag) {
-            if (!$flag) continue;
-            if (strpos($filter, '.') !== false) continue;
+            if (!$flag) {
+                continue;
+            }
+            if (strpos($filter, '.') !== false) {
+                continue;
+            }
             $class = "HTMLPurifier_Filter_$filter";
             $filters[] = new $class;
         }
@@ -175,9 +210,12 @@ class HTMLPurifier
                     // list of un-purified tokens
                     $lexer->tokenizeHTML(
                         // un-purified HTML
-                        $html, $config, $context
+                        $html,
+                        $config,
+                        $context
                     ),
-                    $config, $context
+                    $config,
+                    $context
                 )
             );
 
@@ -192,11 +230,15 @@ class HTMLPurifier
 
     /**
      * Filters an array of HTML snippets
-     * @param $config Optional HTMLPurifier_Config object for this operation.
+     *
+     * @param string[] $array_of_html Array of html snippets
+     * @param HTMLPurifier_Config $config Optional config object for this operation.
      *                See HTMLPurifier::purify() for more details.
-     * @return Array of purified HTML
+     *
+     * @return string[] Array of purified HTML
      */
-    public function purifyArray($array_of_html, $config = null) {
+    public function purifyArray($array_of_html, $config = null)
+    {
         $context_array = array();
         foreach ($array_of_html as $key => $html) {
             $array_of_html[$key] = $this->purify($html, $config);
@@ -208,11 +250,16 @@ class HTMLPurifier
 
     /**
      * Singleton for enforcing just one HTML Purifier in your system
-     * @param $prototype Optional prototype HTMLPurifier instance to
-     *                   overload singleton with, or HTMLPurifier_Config
-     *                   instance to configure the generated version with.
+     *
+     * @param HTMLPurifier|HTMLPurifier_Config $prototype Optional prototype
+     *                   HTMLPurifier instance to overload singleton with,
+     *                   or HTMLPurifier_Config instance to configure the
+     *                   generated version with.
+     *
+     * @return HTMLPurifier
      */
-    public static function instance($prototype = null) {
+    public static function instance($prototype = null)
+    {
         if (!self::$instance || $prototype) {
             if ($prototype instanceof HTMLPurifier) {
                 self::$instance = $prototype;
@@ -226,12 +273,20 @@ class HTMLPurifier
     }
 
     /**
+     * Singleton for enforcing just one HTML Purifier in your system
+     *
+     * @param HTMLPurifier|HTMLPurifier_Config $prototype Optional prototype
+     *                   HTMLPurifier instance to overload singleton with,
+     *                   or HTMLPurifier_Config instance to configure the
+     *                   generated version with.
+     *
+     * @return HTMLPurifier
      * @note Backwards compatibility, see instance()
      */
-    public static function getInstance($prototype = null) {
+    public static function getInstance($prototype = null)
+    {
         return HTMLPurifier::instance($prototype);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier.safe-includes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier.safe-includes.php
similarity index 91%
rename from library/HTMLPurifier.safe-includes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier.safe-includes.php
index 6402de0458..9dea6d1ed5 100644
--- a/library/HTMLPurifier.safe-includes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier.safe-includes.php
@@ -13,6 +13,7 @@
 $__dir = dirname(__FILE__);
 
 require_once $__dir . '/HTMLPurifier.php';
+require_once $__dir . '/HTMLPurifier/Arborize.php';
 require_once $__dir . '/HTMLPurifier/AttrCollections.php';
 require_once $__dir . '/HTMLPurifier/AttrDef.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform.php';
@@ -48,9 +49,11 @@ require_once $__dir . '/HTMLPurifier/Language.php';
 require_once $__dir . '/HTMLPurifier/LanguageFactory.php';
 require_once $__dir . '/HTMLPurifier/Length.php';
 require_once $__dir . '/HTMLPurifier/Lexer.php';
+require_once $__dir . '/HTMLPurifier/Node.php';
 require_once $__dir . '/HTMLPurifier/PercentEncoder.php';
 require_once $__dir . '/HTMLPurifier/PropertyList.php';
 require_once $__dir . '/HTMLPurifier/PropertyListIterator.php';
+require_once $__dir . '/HTMLPurifier/Queue.php';
 require_once $__dir . '/HTMLPurifier/Strategy.php';
 require_once $__dir . '/HTMLPurifier/StringHash.php';
 require_once $__dir . '/HTMLPurifier/StringHashParser.php';
@@ -66,7 +69,9 @@ require_once $__dir . '/HTMLPurifier/URISchemeRegistry.php';
 require_once $__dir . '/HTMLPurifier/UnitConverter.php';
 require_once $__dir . '/HTMLPurifier/VarParser.php';
 require_once $__dir . '/HTMLPurifier/VarParserException.php';
+require_once $__dir . '/HTMLPurifier/Zipper.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS.php';
+require_once $__dir . '/HTMLPurifier/AttrDef/Clone.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/Enum.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/Integer.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/Lang.php';
@@ -84,6 +89,7 @@ require_once $__dir . '/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Filter.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Font.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/FontFamily.php';
+require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Ident.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Length.php';
 require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ListStyle.php';
@@ -119,14 +125,17 @@ require_once $__dir . '/HTMLPurifier/AttrTransform/Lang.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/Length.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/Name.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/NameSync.php';
+require_once $__dir . '/HTMLPurifier/AttrTransform/Nofollow.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/SafeEmbed.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/SafeObject.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/SafeParam.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/ScriptRequired.php';
+require_once $__dir . '/HTMLPurifier/AttrTransform/TargetBlank.php';
 require_once $__dir . '/HTMLPurifier/AttrTransform/Textarea.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/Chameleon.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/Custom.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/Empty.php';
+require_once $__dir . '/HTMLPurifier/ChildDef/List.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/Required.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/Optional.php';
 require_once $__dir . '/HTMLPurifier/ChildDef/StrictBlockquote.php';
@@ -141,10 +150,12 @@ require_once $__dir . '/HTMLPurifier/HTMLModule/CommonAttributes.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Edit.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Forms.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Hypertext.php';
+require_once $__dir . '/HTMLPurifier/HTMLModule/Iframe.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Image.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Legacy.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/List.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Name.php';
+require_once $__dir . '/HTMLPurifier/HTMLModule/Nofollow.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Object.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Presentation.php';
@@ -152,10 +163,12 @@ require_once $__dir . '/HTMLPurifier/HTMLModule/Proprietary.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Ruby.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/SafeEmbed.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/SafeObject.php';
+require_once $__dir . '/HTMLPurifier/HTMLModule/SafeScripting.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Scripting.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/StyleAttribute.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Tables.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Target.php';
+require_once $__dir . '/HTMLPurifier/HTMLModule/TargetBlank.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Text.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy.php';
 require_once $__dir . '/HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
@@ -174,6 +187,9 @@ require_once $__dir . '/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php';
 require_once $__dir . '/HTMLPurifier/Injector/SafeObject.php';
 require_once $__dir . '/HTMLPurifier/Lexer/DOMLex.php';
 require_once $__dir . '/HTMLPurifier/Lexer/DirectLex.php';
+require_once $__dir . '/HTMLPurifier/Node/Comment.php';
+require_once $__dir . '/HTMLPurifier/Node/Element.php';
+require_once $__dir . '/HTMLPurifier/Node/Text.php';
 require_once $__dir . '/HTMLPurifier/Strategy/Composite.php';
 require_once $__dir . '/HTMLPurifier/Strategy/Core.php';
 require_once $__dir . '/HTMLPurifier/Strategy/FixNesting.php';
@@ -190,10 +206,13 @@ require_once $__dir . '/HTMLPurifier/Token/Start.php';
 require_once $__dir . '/HTMLPurifier/Token/Text.php';
 require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternal.php';
 require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternalResources.php';
+require_once $__dir . '/HTMLPurifier/URIFilter/DisableResources.php';
 require_once $__dir . '/HTMLPurifier/URIFilter/HostBlacklist.php';
 require_once $__dir . '/HTMLPurifier/URIFilter/MakeAbsolute.php';
 require_once $__dir . '/HTMLPurifier/URIFilter/Munge.php';
+require_once $__dir . '/HTMLPurifier/URIFilter/SafeIframe.php';
 require_once $__dir . '/HTMLPurifier/URIScheme/data.php';
+require_once $__dir . '/HTMLPurifier/URIScheme/file.php';
 require_once $__dir . '/HTMLPurifier/URIScheme/ftp.php';
 require_once $__dir . '/HTMLPurifier/URIScheme/http.php';
 require_once $__dir . '/HTMLPurifier/URIScheme/https.php';
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php
new file mode 100644
index 0000000000..9e6617be5d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * Converts a stream of HTMLPurifier_Token into an HTMLPurifier_Node,
+ * and back again.
+ *
+ * @note This transformation is not an equivalence.  We mutate the input
+ * token stream to make it so; see all [MUT] markers in code.
+ */
+class HTMLPurifier_Arborize
+{
+    public static function arborize($tokens, $config, $context) {
+        $definition = $config->getHTMLDefinition();
+        $parent = new HTMLPurifier_Token_Start($definition->info_parent);
+        $stack = array($parent->toNode());
+        foreach ($tokens as $token) {
+            $token->skip = null; // [MUT]
+            $token->carryover = null; // [MUT]
+            if ($token instanceof HTMLPurifier_Token_End) {
+                $token->start = null; // [MUT]
+                $r = array_pop($stack);
+                assert($r->name === $token->name);
+                assert(empty($token->attr));
+                $r->endCol = $token->col;
+                $r->endLine = $token->line;
+                $r->endArmor = $token->armor;
+                continue;
+            }
+            $node = $token->toNode();
+            $stack[count($stack)-1]->children[] = $node;
+            if ($token instanceof HTMLPurifier_Token_Start) {
+                $stack[] = $node;
+            }
+        }
+        assert(count($stack) == 1);
+        return $stack[0];
+    }
+
+    public static function flatten($node, $config, $context) {
+        $level = 0;
+        $nodes = array($level => new HTMLPurifier_Queue(array($node)));
+        $closingTokens = array();
+        $tokens = array();
+        do {
+            while (!$nodes[$level]->isEmpty()) {
+                $node = $nodes[$level]->shift(); // FIFO
+                list($start, $end) = $node->toTokenPair();
+                if ($level > 0) {
+                    $tokens[] = $start;
+                }
+                if ($end !== NULL) {
+                    $closingTokens[$level][] = $end;
+                }
+                if ($node instanceof HTMLPurifier_Node_Element) {
+                    $level++;
+                    $nodes[$level] = new HTMLPurifier_Queue();
+                    foreach ($node->children as $childNode) {
+                        $nodes[$level]->push($childNode);
+                    }
+                }
+            }
+            $level--;
+            if ($level && isset($closingTokens[$level])) {
+                while ($token = array_pop($closingTokens[$level])) {
+                    $tokens[] = $token;
+                }
+            }
+        } while ($level > 0);
+        return $tokens;
+    }
+}
diff --git a/library/HTMLPurifier/AttrCollections.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrCollections.php
similarity index 74%
rename from library/HTMLPurifier/AttrCollections.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrCollections.php
index 555b86d042..4f6c2e39a2 100644
--- a/library/HTMLPurifier/AttrCollections.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrCollections.php
@@ -8,7 +8,8 @@ class HTMLPurifier_AttrCollections
 {
 
     /**
-     * Associative array of attribute collections, indexed by name
+     * Associative array of attribute collections, indexed by name.
+     * @type array
      */
     public $info = array();
 
@@ -16,10 +17,11 @@ class HTMLPurifier_AttrCollections
      * Performs all expansions on internal data for use by other inclusions
      * It also collects all attribute collection extensions from
      * modules
-     * @param $attr_types HTMLPurifier_AttrTypes instance
-     * @param $modules Hash array of HTMLPurifier_HTMLModule members
+     * @param HTMLPurifier_AttrTypes $attr_types HTMLPurifier_AttrTypes instance
+     * @param HTMLPurifier_HTMLModule[] $modules Hash array of HTMLPurifier_HTMLModule members
      */
-    public function __construct($attr_types, $modules) {
+    public function __construct($attr_types, $modules)
+    {
         // load extensions from the modules
         foreach ($modules as $module) {
             foreach ($module->attr_collections as $coll_i => $coll) {
@@ -30,7 +32,9 @@ class HTMLPurifier_AttrCollections
                     if ($attr_i === 0 && isset($this->info[$coll_i][$attr_i])) {
                         // merge in includes
                         $this->info[$coll_i][$attr_i] = array_merge(
-                            $this->info[$coll_i][$attr_i], $attr);
+                            $this->info[$coll_i][$attr_i],
+                            $attr
+                        );
                         continue;
                     }
                     $this->info[$coll_i][$attr_i] = $attr;
@@ -49,20 +53,29 @@ class HTMLPurifier_AttrCollections
     /**
      * Takes a reference to an attribute associative array and performs
      * all inclusions specified by the zero index.
-     * @param &$attr Reference to attribute array
+     * @param array &$attr Reference to attribute array
      */
-    public function performInclusions(&$attr) {
-        if (!isset($attr[0])) return;
+    public function performInclusions(&$attr)
+    {
+        if (!isset($attr[0])) {
+            return;
+        }
         $merge = $attr[0];
         $seen  = array(); // recursion guard
         // loop through all the inclusions
         for ($i = 0; isset($merge[$i]); $i++) {
-            if (isset($seen[$merge[$i]])) continue;
+            if (isset($seen[$merge[$i]])) {
+                continue;
+            }
             $seen[$merge[$i]] = true;
             // foreach attribute of the inclusion, copy it over
-            if (!isset($this->info[$merge[$i]])) continue;
+            if (!isset($this->info[$merge[$i]])) {
+                continue;
+            }
             foreach ($this->info[$merge[$i]] as $key => $value) {
-                if (isset($attr[$key])) continue; // also catches more inclusions
+                if (isset($attr[$key])) {
+                    continue;
+                } // also catches more inclusions
                 $attr[$key] = $value;
             }
             if (isset($this->info[$merge[$i]][0])) {
@@ -76,20 +89,24 @@ class HTMLPurifier_AttrCollections
     /**
      * Expands all string identifiers in an attribute array by replacing
      * them with the appropriate values inside HTMLPurifier_AttrTypes
-     * @param &$attr Reference to attribute array
-     * @param $attr_types HTMLPurifier_AttrTypes instance
+     * @param array &$attr Reference to attribute array
+     * @param HTMLPurifier_AttrTypes $attr_types HTMLPurifier_AttrTypes instance
      */
-    public function expandIdentifiers(&$attr, $attr_types) {
-
+    public function expandIdentifiers(&$attr, $attr_types)
+    {
         // because foreach will process new elements we add, make sure we
         // skip duplicates
         $processed = array();
 
         foreach ($attr as $def_i => $def) {
             // skip inclusions
-            if ($def_i === 0) continue;
+            if ($def_i === 0) {
+                continue;
+            }
 
-            if (isset($processed[$def_i])) continue;
+            if (isset($processed[$def_i])) {
+                continue;
+            }
 
             // determine whether or not attribute is required
             if ($required = (strpos($def_i, '*') !== false)) {
@@ -120,9 +137,7 @@ class HTMLPurifier_AttrCollections
                 unset($attr[$def_i]);
             }
         }
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
similarity index 74%
rename from library/HTMLPurifier/AttrDef.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
index b2e4f36c5d..5ac06522b9 100644
--- a/library/HTMLPurifier/AttrDef.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
@@ -14,23 +14,25 @@ abstract class HTMLPurifier_AttrDef
 {
 
     /**
-     * Tells us whether or not an HTML attribute is minimized. Has no
-     * meaning in other contexts.
+     * Tells us whether or not an HTML attribute is minimized.
+     * Has no meaning in other contexts.
+     * @type bool
      */
     public $minimized = false;
 
     /**
-     * Tells us whether or not an HTML attribute is required. Has no
-     * meaning in other contexts
+     * Tells us whether or not an HTML attribute is required.
+     * Has no meaning in other contexts
+     * @type bool
      */
     public $required = false;
 
     /**
      * Validates and cleans passed string according to a definition.
      *
-     * @param $string String to be validated and cleaned.
-     * @param $config Mandatory HTMLPurifier_Config object.
-     * @param $context Mandatory HTMLPurifier_AttrContext object.
+     * @param string $string String to be validated and cleaned.
+     * @param HTMLPurifier_Config $config Mandatory HTMLPurifier_Config object.
+     * @param HTMLPurifier_Context $context Mandatory HTMLPurifier_Context object.
      */
     abstract public function validate($string, $config, $context);
 
@@ -55,7 +57,8 @@ abstract class HTMLPurifier_AttrDef
      *          parsing XML, thus, this behavior may still be correct. We
      *          assume that newlines have been normalized.
      */
-    public function parseCDATA($string) {
+    public function parseCDATA($string)
+    {
         $string = trim($string);
         $string = str_replace(array("\n", "\t", "\r"), ' ', $string);
         return $string;
@@ -63,10 +66,11 @@ abstract class HTMLPurifier_AttrDef
 
     /**
      * Factory method for creating this class from a string.
-     * @param $string String construction info
-     * @return Created AttrDef object corresponding to $string
+     * @param string $string String construction info
+     * @return HTMLPurifier_AttrDef Created AttrDef object corresponding to $string
      */
-    public function make($string) {
+    public function make($string)
+    {
         // default implementation, return a flyweight of this object.
         // If $string has an effect on the returned object (i.e. you
         // need to overload this method), it is best
@@ -77,16 +81,20 @@ abstract class HTMLPurifier_AttrDef
     /**
      * Removes spaces from rgb(0, 0, 0) so that shorthand CSS properties work
      * properly. THIS IS A HACK!
+     * @param string $string a CSS colour definition
+     * @return string
      */
-    protected function mungeRgb($string) {
+    protected function mungeRgb($string)
+    {
         return preg_replace('/rgb\((\d+)\s*,\s*(\d+)\s*,\s*(\d+)\)/', 'rgb(\1,\2,\3)', $string);
     }
 
     /**
-     * Parses a possibly escaped CSS string and returns the "pure" 
+     * Parses a possibly escaped CSS string and returns the "pure"
      * version of it.
      */
-    protected function expandCSSEscape($string) {
+    protected function expandCSSEscape($string)
+    {
         // flexibly parse it
         $ret = '';
         for ($i = 0, $c = strlen($string); $i < $c; $i++) {
@@ -99,25 +107,32 @@ abstract class HTMLPurifier_AttrDef
                 if (ctype_xdigit($string[$i])) {
                     $code = $string[$i];
                     for ($a = 1, $i++; $i < $c && $a < 6; $i++, $a++) {
-                        if (!ctype_xdigit($string[$i])) break;
+                        if (!ctype_xdigit($string[$i])) {
+                            break;
+                        }
                         $code .= $string[$i];
                     }
                     // We have to be extremely careful when adding
                     // new characters, to make sure we're not breaking
                     // the encoding.
                     $char = HTMLPurifier_Encoder::unichr(hexdec($code));
-                    if (HTMLPurifier_Encoder::cleanUTF8($char) === '') continue;
+                    if (HTMLPurifier_Encoder::cleanUTF8($char) === '') {
+                        continue;
+                    }
                     $ret .= $char;
-                    if ($i < $c && trim($string[$i]) !== '') $i--;
+                    if ($i < $c && trim($string[$i]) !== '') {
+                        $i--;
+                    }
+                    continue;
+                }
+                if ($string[$i] === "\n") {
                     continue;
                 }
-                if ($string[$i] === "\n") continue;
             }
             $ret .= $string[$i];
         }
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS.php
similarity index 77%
rename from library/HTMLPurifier/AttrDef/CSS.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS.php
index 953e706755..02c1641fb2 100644
--- a/library/HTMLPurifier/AttrDef/CSS.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS.php
@@ -14,8 +14,14 @@
 class HTMLPurifier_AttrDef_CSS extends HTMLPurifier_AttrDef
 {
 
-    public function validate($css, $config, $context) {
-
+    /**
+     * @param string $css
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($css, $config, $context)
+    {
         $css = $this->parseCDATA($css);
 
         $definition = $config->getCSSDefinition();
@@ -36,34 +42,47 @@ class HTMLPurifier_AttrDef_CSS extends HTMLPurifier_AttrDef
         $context->register('CurrentCSSProperty', $property);
 
         foreach ($declarations as $declaration) {
-            if (!$declaration) continue;
-            if (!strpos($declaration, ':')) continue;
+            if (!$declaration) {
+                continue;
+            }
+            if (!strpos($declaration, ':')) {
+                continue;
+            }
             list($property, $value) = explode(':', $declaration, 2);
             $property = trim($property);
-            $value    = trim($value);
+            $value = trim($value);
             $ok = false;
             do {
                 if (isset($definition->info[$property])) {
                     $ok = true;
                     break;
                 }
-                if (ctype_lower($property)) break;
+                if (ctype_lower($property)) {
+                    break;
+                }
                 $property = strtolower($property);
                 if (isset($definition->info[$property])) {
                     $ok = true;
                     break;
                 }
-            } while(0);
-            if (!$ok) continue;
+            } while (0);
+            if (!$ok) {
+                continue;
+            }
             // inefficient call, since the validator will do this again
             if (strtolower(trim($value)) !== 'inherit') {
                 // inherit works for everything (but only on the base property)
                 $result = $definition->info[$property]->validate(
-                    $value, $config, $context );
+                    $value,
+                    $config,
+                    $context
+                );
             } else {
                 $result = 'inherit';
             }
-            if ($result === false) continue;
+            if ($result === false) {
+                continue;
+            }
             $propvalues[$property] = $result;
         }
 
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php
new file mode 100644
index 0000000000..af2b83dff8
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php
@@ -0,0 +1,34 @@
+<?php
+
+class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
+{
+
+    public function __construct()
+    {
+        parent::__construct(false); // opacity is non-negative, but we will clamp it
+    }
+
+    /**
+     * @param string $number
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public function validate($number, $config, $context)
+    {
+        $result = parent::validate($number, $config, $context);
+        if ($result === false) {
+            return $result;
+        }
+        $float = (float)$result;
+        if ($float < 0.0) {
+            $result = '0';
+        }
+        if ($float > 1.0) {
+            $result = '1';
+        }
+        return $result;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Background.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Background.php
similarity index 63%
rename from library/HTMLPurifier/AttrDef/CSS/Background.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Background.php
index 3a3d20cd6a..7f1ea3b0f1 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Background.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Background.php
@@ -9,11 +9,16 @@ class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
 
     /**
      * Local copy of component validators.
+     * @type HTMLPurifier_AttrDef[]
      * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
      */
     protected $info;
 
-    public function __construct($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function __construct($config)
+    {
         $def = $config->getCSSDefinition();
         $this->info['background-color'] = $def->info['background-color'];
         $this->info['background-image'] = $def->info['background-image'];
@@ -22,40 +27,55 @@ class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
         $this->info['background-position'] = $def->info['background-position'];
     }
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         // regular pre-processing
         $string = $this->parseCDATA($string);
-        if ($string === '') return false;
+        if ($string === '') {
+            return false;
+        }
 
         // munge rgb() decl if necessary
         $string = $this->mungeRgb($string);
 
         // assumes URI doesn't have spaces in it
-        $bits = explode(' ', strtolower($string)); // bits to process
+        $bits = explode(' ', $string); // bits to process
 
         $caught = array();
-        $caught['color']    = false;
-        $caught['image']    = false;
-        $caught['repeat']   = false;
+        $caught['color'] = false;
+        $caught['image'] = false;
+        $caught['repeat'] = false;
         $caught['attachment'] = false;
         $caught['position'] = false;
 
         $i = 0; // number of catches
-        $none = false;
 
         foreach ($bits as $bit) {
-            if ($bit === '') continue;
+            if ($bit === '') {
+                continue;
+            }
             foreach ($caught as $key => $status) {
                 if ($key != 'position') {
-                    if ($status !== false) continue;
+                    if ($status !== false) {
+                        continue;
+                    }
                     $r = $this->info['background-' . $key]->validate($bit, $config, $context);
                 } else {
                     $r = $bit;
                 }
-                if ($r === false) continue;
+                if ($r === false) {
+                    continue;
+                }
                 if ($key == 'position') {
-                    if ($caught[$key] === false) $caught[$key] = '';
+                    if ($caught[$key] === false) {
+                        $caught[$key] = '';
+                    }
                     $caught[$key] .= $r . ' ';
                 } else {
                     $caught[$key] = $r;
@@ -65,7 +85,9 @@ class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
             }
         }
 
-        if (!$i) return false;
+        if (!$i) {
+            return false;
+        }
         if ($caught['position'] !== false) {
             $caught['position'] = $this->info['background-position']->
                 validate($caught['position'], $config, $context);
@@ -73,15 +95,17 @@ class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
 
         $ret = array();
         foreach ($caught as $value) {
-            if ($value === false) continue;
+            if ($value === false) {
+                continue;
+            }
             $ret[] = $value;
         }
 
-        if (empty($ret)) return false;
+        if (empty($ret)) {
+            return false;
+        }
         return implode(' ', $ret);
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
similarity index 73%
rename from library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
index fae82eaec8..4580ef5a91 100644
--- a/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
@@ -44,15 +44,30 @@
 class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef
 {
 
+    /**
+     * @type HTMLPurifier_AttrDef_CSS_Length
+     */
     protected $length;
+
+    /**
+     * @type HTMLPurifier_AttrDef_CSS_Percentage
+     */
     protected $percentage;
 
-    public function __construct() {
-        $this->length     = new HTMLPurifier_AttrDef_CSS_Length();
+    public function __construct()
+    {
+        $this->length = new HTMLPurifier_AttrDef_CSS_Length();
         $this->percentage = new HTMLPurifier_AttrDef_CSS_Percentage();
     }
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $string = $this->parseCDATA($string);
         $bits = explode(' ', $string);
 
@@ -74,7 +89,9 @@ class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef
         );
 
         foreach ($bits as $bit) {
-            if ($bit === '') continue;
+            if ($bit === '') {
+                continue;
+            }
 
             // test for keyword
             $lbit = ctype_lower($bit) ? $bit : strtolower($bit);
@@ -104,30 +121,37 @@ class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef
                 $measures[] = $r;
                 $i++;
             }
-
         }
 
-        if (!$i) return false; // no valid values were caught
+        if (!$i) {
+            return false;
+        } // no valid values were caught
 
         $ret = array();
 
         // first keyword
-        if     ($keywords['h'])     $ret[] = $keywords['h'];
-        elseif ($keywords['ch']) {
+        if ($keywords['h']) {
+            $ret[] = $keywords['h'];
+        } elseif ($keywords['ch']) {
             $ret[] = $keywords['ch'];
             $keywords['cv'] = false; // prevent re-use: center = center center
+        } elseif (count($measures)) {
+            $ret[] = array_shift($measures);
         }
-        elseif (count($measures))   $ret[] = array_shift($measures);
 
-        if     ($keywords['v'])     $ret[] = $keywords['v'];
-        elseif ($keywords['cv'])    $ret[] = $keywords['cv'];
-        elseif (count($measures))   $ret[] = array_shift($measures);
+        if ($keywords['v']) {
+            $ret[] = $keywords['v'];
+        } elseif ($keywords['cv']) {
+            $ret[] = $keywords['cv'];
+        } elseif (count($measures)) {
+            $ret[] = array_shift($measures);
+        }
 
-        if (empty($ret)) return false;
+        if (empty($ret)) {
+            return false;
+        }
         return implode(' ', $ret);
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Border.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Border.php
similarity index 71%
rename from library/HTMLPurifier/AttrDef/CSS/Border.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Border.php
index 42a1d1b4ae..16243ba1ed 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Border.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Border.php
@@ -8,17 +8,29 @@ class HTMLPurifier_AttrDef_CSS_Border extends HTMLPurifier_AttrDef
 
     /**
      * Local copy of properties this property is shorthand for.
+     * @type HTMLPurifier_AttrDef[]
      */
     protected $info = array();
 
-    public function __construct($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function __construct($config)
+    {
         $def = $config->getCSSDefinition();
         $this->info['border-width'] = $def->info['border-width'];
         $this->info['border-style'] = $def->info['border-style'];
         $this->info['border-top-color'] = $def->info['border-top-color'];
     }
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $string = $this->parseCDATA($string);
         $string = $this->mungeRgb($string);
         $bits = explode(' ', $string);
@@ -26,7 +38,9 @@ class HTMLPurifier_AttrDef_CSS_Border extends HTMLPurifier_AttrDef
         $ret = ''; // return value
         foreach ($bits as $bit) {
             foreach ($this->info as $propname => $validator) {
-                if (isset($done[$propname])) continue;
+                if (isset($done[$propname])) {
+                    continue;
+                }
                 $r = $validator->validate($bit, $config, $context);
                 if ($r !== false) {
                     $ret .= $r . ' ';
@@ -37,7 +51,6 @@ class HTMLPurifier_AttrDef_CSS_Border extends HTMLPurifier_AttrDef
         }
         return rtrim($ret);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Color.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php
similarity index 54%
rename from library/HTMLPurifier/AttrDef/CSS/Color.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php
index 07f95a6719..16d2a6b98c 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Color.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php
@@ -6,29 +6,47 @@
 class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
 {
 
-    public function validate($color, $config, $context) {
-
+    /**
+     * @param string $color
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($color, $config, $context)
+    {
         static $colors = null;
-        if ($colors === null) $colors = $config->get('Core.ColorKeywords');
+        if ($colors === null) {
+            $colors = $config->get('Core.ColorKeywords');
+        }
 
         $color = trim($color);
-        if ($color === '') return false;
+        if ($color === '') {
+            return false;
+        }
 
         $lower = strtolower($color);
-        if (isset($colors[$lower])) return $colors[$lower];
+        if (isset($colors[$lower])) {
+            return $colors[$lower];
+        }
 
         if (strpos($color, 'rgb(') !== false) {
             // rgb literal handling
             $length = strlen($color);
-            if (strpos($color, ')') !== $length - 1) return false;
+            if (strpos($color, ')') !== $length - 1) {
+                return false;
+            }
             $triad = substr($color, 4, $length - 4 - 1);
             $parts = explode(',', $triad);
-            if (count($parts) !== 3) return false;
+            if (count($parts) !== 3) {
+                return false;
+            }
             $type = false; // to ensure that they're all the same type
             $new_parts = array();
             foreach ($parts as $part) {
                 $part = trim($part);
-                if ($part === '') return false;
+                if ($part === '') {
+                    return false;
+                }
                 $length = strlen($part);
                 if ($part[$length - 1] === '%') {
                     // handle percents
@@ -37,9 +55,13 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
                     } elseif ($type !== 'percentage') {
                         return false;
                     }
-                    $num = (float) substr($part, 0, $length - 1);
-                    if ($num < 0) $num = 0;
-                    if ($num > 100) $num = 100;
+                    $num = (float)substr($part, 0, $length - 1);
+                    if ($num < 0) {
+                        $num = 0;
+                    }
+                    if ($num > 100) {
+                        $num = 100;
+                    }
                     $new_parts[] = "$num%";
                 } else {
                     // handle integers
@@ -48,10 +70,14 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
                     } elseif ($type !== 'integer') {
                         return false;
                     }
-                    $num = (int) $part;
-                    if ($num < 0) $num = 0;
-                    if ($num > 255) $num = 255;
-                    $new_parts[] = (string) $num;
+                    $num = (int)$part;
+                    if ($num < 0) {
+                        $num = 0;
+                    }
+                    if ($num > 255) {
+                        $num = 255;
+                    }
+                    $new_parts[] = (string)$num;
                 }
             }
             $new_triad = implode(',', $new_parts);
@@ -65,14 +91,15 @@ class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
                 $color = '#' . $color;
             }
             $length = strlen($hex);
-            if ($length !== 3 && $length !== 6) return false;
-            if (!ctype_xdigit($hex)) return false;
+            if ($length !== 3 && $length !== 6) {
+                return false;
+            }
+            if (!ctype_xdigit($hex)) {
+                return false;
+            }
         }
-
         return $color;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Composite.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Composite.php
similarity index 61%
rename from library/HTMLPurifier/AttrDef/CSS/Composite.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Composite.php
index de1289cba8..9c1750554f 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Composite.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Composite.php
@@ -13,26 +13,36 @@ class HTMLPurifier_AttrDef_CSS_Composite extends HTMLPurifier_AttrDef
 {
 
     /**
-     * List of HTMLPurifier_AttrDef objects that may process strings
+     * List of objects that may process strings.
+     * @type HTMLPurifier_AttrDef[]
      * @todo Make protected
      */
     public $defs;
 
     /**
-     * @param $defs List of HTMLPurifier_AttrDef objects
+     * @param HTMLPurifier_AttrDef[] $defs List of HTMLPurifier_AttrDef objects
      */
-    public function __construct($defs) {
+    public function __construct($defs)
+    {
         $this->defs = $defs;
     }
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         foreach ($this->defs as $i => $def) {
             $result = $this->defs[$i]->validate($string, $config, $context);
-            if ($result !== false) return $result;
+            if ($result !== false) {
+                return $result;
+            }
         }
         return false;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
new file mode 100644
index 0000000000..9d77cc9aaf
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Decorator which enables CSS properties to be disabled for specific elements.
+ */
+class HTMLPurifier_AttrDef_CSS_DenyElementDecorator extends HTMLPurifier_AttrDef
+{
+    /**
+     * @type HTMLPurifier_AttrDef
+     */
+    public $def;
+    /**
+     * @type string
+     */
+    public $element;
+
+    /**
+     * @param HTMLPurifier_AttrDef $def Definition to wrap
+     * @param string $element Element to deny
+     */
+    public function __construct($def, $element)
+    {
+        $this->def = $def;
+        $this->element = $element;
+    }
+
+    /**
+     * Checks if CurrentToken is set and equal to $this->element
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $token = $context->get('CurrentToken', true);
+        if ($token && $token->name == $this->element) {
+            return false;
+        }
+        return $this->def->validate($string, $config, $context);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Filter.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
similarity index 62%
rename from library/HTMLPurifier/AttrDef/CSS/Filter.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
index 147894b861..bde4c3301f 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Filter.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
@@ -7,23 +7,37 @@
  */
 class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
 {
-
+    /**
+     * @type HTMLPurifier_AttrDef_Integer
+     */
     protected $intValidator;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->intValidator = new HTMLPurifier_AttrDef_Integer();
     }
 
-    public function validate($value, $config, $context) {
+    /**
+     * @param string $value
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($value, $config, $context)
+    {
         $value = $this->parseCDATA($value);
-        if ($value === 'none') return $value;
+        if ($value === 'none') {
+            return $value;
+        }
         // if we looped this we could support multiple filters
         $function_length = strcspn($value, '(');
         $function = trim(substr($value, 0, $function_length));
         if ($function !== 'alpha' &&
             $function !== 'Alpha' &&
             $function !== 'progid:DXImageTransform.Microsoft.Alpha'
-            ) return false;
+        ) {
+            return false;
+        }
         $cursor = $function_length + 1;
         $parameters_length = strcspn($value, ')', $cursor);
         $parameters = substr($value, $cursor, $parameters_length);
@@ -32,15 +46,25 @@ class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
         $lookup = array();
         foreach ($params as $param) {
             list($key, $value) = explode('=', $param);
-            $key   = trim($key);
+            $key = trim($key);
             $value = trim($value);
-            if (isset($lookup[$key])) continue;
-            if ($key !== 'opacity') continue;
+            if (isset($lookup[$key])) {
+                continue;
+            }
+            if ($key !== 'opacity') {
+                continue;
+            }
             $value = $this->intValidator->validate($value, $config, $context);
-            if ($value === false) continue;
-            $int = (int) $value;
-            if ($int > 100) $value = '100';
-            if ($int < 0) $value = '0';
+            if ($value === false) {
+                continue;
+            }
+            $int = (int)$value;
+            if ($int > 100) {
+                $value = '100';
+            }
+            if ($int < 0) {
+                $value = '0';
+            }
             $ret_params[] = "$key=$value";
             $lookup[$key] = true;
         }
@@ -48,7 +72,6 @@ class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
         $ret_function = "$function($ret_parameters)";
         return $ret_function;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Font.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Font.php
similarity index 67%
rename from library/HTMLPurifier/AttrDef/CSS/Font.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Font.php
index 699ee0b701..579b97ef1c 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Font.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Font.php
@@ -7,8 +7,8 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
 {
 
     /**
-     * Local copy of component validators.
-     *
+     * Local copy of validators
+     * @type HTMLPurifier_AttrDef[]
      * @note If we moved specific CSS property definitions to their own
      *       classes instead of having them be assembled at run time by
      *       CSSDefinition, this wouldn't be necessary.  We'd instantiate
@@ -16,18 +16,28 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
      */
     protected $info = array();
 
-    public function __construct($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function __construct($config)
+    {
         $def = $config->getCSSDefinition();
-        $this->info['font-style']   = $def->info['font-style'];
+        $this->info['font-style'] = $def->info['font-style'];
         $this->info['font-variant'] = $def->info['font-variant'];
-        $this->info['font-weight']  = $def->info['font-weight'];
-        $this->info['font-size']    = $def->info['font-size'];
-        $this->info['line-height']  = $def->info['line-height'];
-        $this->info['font-family']  = $def->info['font-family'];
+        $this->info['font-weight'] = $def->info['font-weight'];
+        $this->info['font-size'] = $def->info['font-size'];
+        $this->info['line-height'] = $def->info['line-height'];
+        $this->info['font-family'] = $def->info['font-family'];
     }
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         static $system_fonts = array(
             'caption' => true,
             'icon' => true,
@@ -39,7 +49,9 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
 
         // regular pre-processing
         $string = $this->parseCDATA($string);
-        if ($string === '') return false;
+        if ($string === '') {
+            return false;
+        }
 
         // check if it's one of the keywords
         $lowercase_string = strtolower($string);
@@ -54,15 +66,20 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
         $final = ''; // output
 
         for ($i = 0, $size = count($bits); $i < $size; $i++) {
-            if ($bits[$i] === '') continue;
+            if ($bits[$i] === '') {
+                continue;
+            }
             switch ($stage) {
-
-                // attempting to catch font-style, font-variant or font-weight
-                case 0:
+                case 0: // attempting to catch font-style, font-variant or font-weight
                     foreach ($stage_1 as $validator_name) {
-                        if (isset($caught[$validator_name])) continue;
+                        if (isset($caught[$validator_name])) {
+                            continue;
+                        }
                         $r = $this->info[$validator_name]->validate(
-                                                $bits[$i], $config, $context);
+                            $bits[$i],
+                            $config,
+                            $context
+                        );
                         if ($r !== false) {
                             $final .= $r . ' ';
                             $caught[$validator_name] = true;
@@ -70,15 +87,17 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
                         }
                     }
                     // all three caught, continue on
-                    if (count($caught) >= 3) $stage = 1;
-                    if ($r !== false) break;
-
-                // attempting to catch font-size and perhaps line-height
-                case 1:
+                    if (count($caught) >= 3) {
+                        $stage = 1;
+                    }
+                    if ($r !== false) {
+                        break;
+                    }
+                case 1: // attempting to catch font-size and perhaps line-height
                     $found_slash = false;
                     if (strpos($bits[$i], '/') !== false) {
                         list($font_size, $line_height) =
-                                                    explode('/', $bits[$i]);
+                            explode('/', $bits[$i]);
                         if ($line_height === '') {
                             // ooh, there's a space after the slash!
                             $line_height = false;
@@ -89,14 +108,19 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
                         $line_height = false;
                     }
                     $r = $this->info['font-size']->validate(
-                                              $font_size, $config, $context);
+                        $font_size,
+                        $config,
+                        $context
+                    );
                     if ($r !== false) {
                         $final .= $r;
                         // attempt to catch line-height
                         if ($line_height === false) {
                             // we need to scroll forward
                             for ($j = $i + 1; $j < $size; $j++) {
-                                if ($bits[$j] === '') continue;
+                                if ($bits[$j] === '') {
+                                    continue;
+                                }
                                 if ($bits[$j] === '/') {
                                     if ($found_slash) {
                                         return false;
@@ -116,7 +140,10 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
                         if ($found_slash) {
                             $i = $j;
                             $r = $this->info['line-height']->validate(
-                                              $line_height, $config, $context);
+                                $line_height,
+                                $config,
+                                $context
+                            );
                             if ($r !== false) {
                                 $final .= '/' . $r;
                             }
@@ -126,13 +153,14 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
                         break;
                     }
                     return false;
-
-                // attempting to catch font-family
-                case 2:
+                case 2: // attempting to catch font-family
                     $font_family =
                         implode(' ', array_slice($bits, $i, $size - $i));
                     $r = $this->info['font-family']->validate(
-                                              $font_family, $config, $context);
+                        $font_family,
+                        $config,
+                        $context
+                    );
                     if ($r !== false) {
                         $final .= $r . ' ';
                         // processing completed successfully
@@ -143,7 +171,6 @@ class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
         }
         return false;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/FontFamily.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
new file mode 100644
index 0000000000..74e24c8816
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/FontFamily.php
@@ -0,0 +1,219 @@
+<?php
+
+/**
+ * Validates a font family list according to CSS spec
+ */
+class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
+{
+
+    protected $mask = null;
+
+    public function __construct()
+    {
+        $this->mask = '_- ';
+        for ($c = 'a'; $c <= 'z'; $c++) {
+            $this->mask .= $c;
+        }
+        for ($c = 'A'; $c <= 'Z'; $c++) {
+            $this->mask .= $c;
+        }
+        for ($c = '0'; $c <= '9'; $c++) {
+            $this->mask .= $c;
+        } // cast-y, but should be fine
+        // special bytes used by UTF-8
+        for ($i = 0x80; $i <= 0xFF; $i++) {
+            // We don't bother excluding invalid bytes in this range,
+            // because the our restriction of well-formed UTF-8 will
+            // prevent these from ever occurring.
+            $this->mask .= chr($i);
+        }
+
+        /*
+            PHP's internal strcspn implementation is
+            O(length of string * length of mask), making it inefficient
+            for large masks.  However, it's still faster than
+            preg_match 8)
+          for (p = s1;;) {
+            spanp = s2;
+            do {
+              if (*spanp == c || p == s1_end) {
+                return p - s1;
+              }
+            } while (spanp++ < (s2_end - 1));
+            c = *++p;
+          }
+         */
+        // possible optimization: invert the mask.
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        static $generic_names = array(
+            'serif' => true,
+            'sans-serif' => true,
+            'monospace' => true,
+            'fantasy' => true,
+            'cursive' => true
+        );
+        $allowed_fonts = $config->get('CSS.AllowedFonts');
+
+        // assume that no font names contain commas in them
+        $fonts = explode(',', $string);
+        $final = '';
+        foreach ($fonts as $font) {
+            $font = trim($font);
+            if ($font === '') {
+                continue;
+            }
+            // match a generic name
+            if (isset($generic_names[$font])) {
+                if ($allowed_fonts === null || isset($allowed_fonts[$font])) {
+                    $final .= $font . ', ';
+                }
+                continue;
+            }
+            // match a quoted name
+            if ($font[0] === '"' || $font[0] === "'") {
+                $length = strlen($font);
+                if ($length <= 2) {
+                    continue;
+                }
+                $quote = $font[0];
+                if ($font[$length - 1] !== $quote) {
+                    continue;
+                }
+                $font = substr($font, 1, $length - 2);
+            }
+
+            $font = $this->expandCSSEscape($font);
+
+            // $font is a pure representation of the font name
+
+            if ($allowed_fonts !== null && !isset($allowed_fonts[$font])) {
+                continue;
+            }
+
+            if (ctype_alnum($font) && $font !== '') {
+                // very simple font, allow it in unharmed
+                $final .= $font . ', ';
+                continue;
+            }
+
+            // bugger out on whitespace.  form feed (0C) really
+            // shouldn't show up regardless
+            $font = str_replace(array("\n", "\t", "\r", "\x0C"), ' ', $font);
+
+            // Here, there are various classes of characters which need
+            // to be treated differently:
+            //  - Alphanumeric characters are essentially safe.  We
+            //    handled these above.
+            //  - Spaces require quoting, though most parsers will do
+            //    the right thing if there aren't any characters that
+            //    can be misinterpreted
+            //  - Dashes rarely occur, but they fairly unproblematic
+            //    for parsing/rendering purposes.
+            //  The above characters cover the majority of Western font
+            //  names.
+            //  - Arbitrary Unicode characters not in ASCII.  Because
+            //    most parsers give little thought to Unicode, treatment
+            //    of these codepoints is basically uniform, even for
+            //    punctuation-like codepoints.  These characters can
+            //    show up in non-Western pages and are supported by most
+            //    major browsers, for example: "ＭＳ 明朝" is a
+            //    legitimate font-name
+            //    <http://ja.wikipedia.org/wiki/MS_明朝>.  See
+            //    the CSS3 spec for more examples:
+            //    <http://www.w3.org/TR/2011/WD-css3-fonts-20110324/localizedfamilynames.png>
+            //    You can see live samples of these on the Internet:
+            //    <http://www.google.co.jp/search?q=font-family+ＭＳ+明朝|ゴシック>
+            //    However, most of these fonts have ASCII equivalents:
+            //    for example, 'MS Mincho', and it's considered
+            //    professional to use ASCII font names instead of
+            //    Unicode font names.  Thanks Takeshi Terada for
+            //    providing this information.
+            //  The following characters, to my knowledge, have not been
+            //  used to name font names.
+            //  - Single quote.  While theoretically you might find a
+            //    font name that has a single quote in its name (serving
+            //    as an apostrophe, e.g. Dave's Scribble), I haven't
+            //    been able to find any actual examples of this.
+            //    Internet Explorer's cssText translation (which I
+            //    believe is invoked by innerHTML) normalizes any
+            //    quoting to single quotes, and fails to escape single
+            //    quotes.  (Note that this is not IE's behavior for all
+            //    CSS properties, just some sort of special casing for
+            //    font-family).  So a single quote *cannot* be used
+            //    safely in the font-family context if there will be an
+            //    innerHTML/cssText translation.  Note that Firefox 3.x
+            //    does this too.
+            //  - Double quote.  In IE, these get normalized to
+            //    single-quotes, no matter what the encoding.  (Fun
+            //    fact, in IE8, the 'content' CSS property gained
+            //    support, where they special cased to preserve encoded
+            //    double quotes, but still translate unadorned double
+            //    quotes into single quotes.)  So, because their
+            //    fixpoint behavior is identical to single quotes, they
+            //    cannot be allowed either.  Firefox 3.x displays
+            //    single-quote style behavior.
+            //  - Backslashes are reduced by one (so \\ -> \) every
+            //    iteration, so they cannot be used safely.  This shows
+            //    up in IE7, IE8 and FF3
+            //  - Semicolons, commas and backticks are handled properly.
+            //  - The rest of the ASCII punctuation is handled properly.
+            // We haven't checked what browsers do to unadorned
+            // versions, but this is not important as long as the
+            // browser doesn't /remove/ surrounding quotes (as IE does
+            // for HTML).
+            //
+            // With these results in hand, we conclude that there are
+            // various levels of safety:
+            //  - Paranoid: alphanumeric, spaces and dashes(?)
+            //  - International: Paranoid + non-ASCII Unicode
+            //  - Edgy: Everything except quotes, backslashes
+            //  - NoJS: Standards compliance, e.g. sod IE. Note that
+            //    with some judicious character escaping (since certain
+            //    types of escaping doesn't work) this is theoretically
+            //    OK as long as innerHTML/cssText is not called.
+            // We believe that international is a reasonable default
+            // (that we will implement now), and once we do more
+            // extensive research, we may feel comfortable with dropping
+            // it down to edgy.
+
+            // Edgy: alphanumeric, spaces, dashes, underscores and Unicode.  Use of
+            // str(c)spn assumes that the string was already well formed
+            // Unicode (which of course it is).
+            if (strspn($font, $this->mask) !== strlen($font)) {
+                continue;
+            }
+
+            // Historical:
+            // In the absence of innerHTML/cssText, these ugly
+            // transforms don't pose a security risk (as \\ and \"
+            // might--these escapes are not supported by most browsers).
+            // We could try to be clever and use single-quote wrapping
+            // when there is a double quote present, but I have choosen
+            // not to implement that.  (NOTE: you can reduce the amount
+            // of escapes by one depending on what quoting style you use)
+            // $font = str_replace('\\', '\\5C ', $font);
+            // $font = str_replace('"',  '\\22 ', $font);
+            // $font = str_replace("'",  '\\27 ', $font);
+
+            // font possibly with spaces, requires quoting
+            $final .= "'$font', ";
+        }
+        $final = rtrim($final, ', ');
+        if ($final === '') {
+            return false;
+        }
+        return $final;
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php
new file mode 100644
index 0000000000..973002c17f
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Ident.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * Validates based on {ident} CSS grammar production
+ */
+class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = trim($string);
+
+        // early abort: '' and '0' (strings that convert to false) are invalid
+        if (!$string) {
+            return false;
+        }
+
+        $pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/';
+        if (!preg_match($pattern, $string)) {
+            return false;
+        }
+        return $string;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
similarity index 62%
rename from library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
index 4e6b35e5a0..ffc989fe80 100644
--- a/library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
@@ -5,20 +5,34 @@
  */
 class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef
 {
-    public $def, $allow;
+    /**
+     * @type HTMLPurifier_AttrDef
+     */
+    public $def;
+    /**
+     * @type bool
+     */
+    public $allow;
 
     /**
-     * @param $def Definition to wrap
-     * @param $allow Whether or not to allow !important
+     * @param HTMLPurifier_AttrDef $def Definition to wrap
+     * @param bool $allow Whether or not to allow !important
      */
-    public function __construct($def, $allow = false) {
+    public function __construct($def, $allow = false)
+    {
         $this->def = $def;
         $this->allow = $allow;
     }
+
     /**
      * Intercepts and removes !important if necessary
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
      */
-    public function validate($string, $config, $context) {
+    public function validate($string, $config, $context)
+    {
         // test for ! and important tokens
         $string = trim($string);
         $is_important = false;
@@ -32,7 +46,9 @@ class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef
             }
         }
         $string = $this->def->validate($string, $config, $context);
-        if ($this->allow && $is_important) $string .= ' !important';
+        if ($this->allow && $is_important) {
+            $string .= ' !important';
+        }
         return $string;
     }
 }
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Length.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Length.php
new file mode 100644
index 0000000000..f12453a04a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Length.php
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Represents a Length as defined by CSS.
+ */
+class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @type HTMLPurifier_Length|string
+     */
+    protected $min;
+
+    /**
+     * @type HTMLPurifier_Length|string
+     */
+    protected $max;
+
+    /**
+     * @param HTMLPurifier_Length|string $min Minimum length, or null for no bound. String is also acceptable.
+     * @param HTMLPurifier_Length|string $max Maximum length, or null for no bound. String is also acceptable.
+     */
+    public function __construct($min = null, $max = null)
+    {
+        $this->min = $min !== null ? HTMLPurifier_Length::make($min) : null;
+        $this->max = $max !== null ? HTMLPurifier_Length::make($max) : null;
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = $this->parseCDATA($string);
+
+        // Optimizations
+        if ($string === '') {
+            return false;
+        }
+        if ($string === '0') {
+            return '0';
+        }
+        if (strlen($string) === 1) {
+            return false;
+        }
+
+        $length = HTMLPurifier_Length::make($string);
+        if (!$length->isValid()) {
+            return false;
+        }
+
+        if ($this->min) {
+            $c = $length->compareTo($this->min);
+            if ($c === false) {
+                return false;
+            }
+            if ($c < 0) {
+                return false;
+            }
+        }
+        if ($this->max) {
+            $c = $length->compareTo($this->max);
+            if ($c === false) {
+                return false;
+            }
+            if ($c > 0) {
+                return false;
+            }
+        }
+        return $length->toString();
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ListStyle.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ListStyle.php
new file mode 100644
index 0000000000..e74d42654e
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/ListStyle.php
@@ -0,0 +1,112 @@
+<?php
+
+/**
+ * Validates shorthand CSS property list-style.
+ * @warning Does not support url tokens that have internal spaces.
+ */
+class HTMLPurifier_AttrDef_CSS_ListStyle extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * Local copy of validators.
+     * @type HTMLPurifier_AttrDef[]
+     * @note See HTMLPurifier_AttrDef_CSS_Font::$info for a similar impl.
+     */
+    protected $info;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function __construct($config)
+    {
+        $def = $config->getCSSDefinition();
+        $this->info['list-style-type'] = $def->info['list-style-type'];
+        $this->info['list-style-position'] = $def->info['list-style-position'];
+        $this->info['list-style-image'] = $def->info['list-style-image'];
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        // regular pre-processing
+        $string = $this->parseCDATA($string);
+        if ($string === '') {
+            return false;
+        }
+
+        // assumes URI doesn't have spaces in it
+        $bits = explode(' ', strtolower($string)); // bits to process
+
+        $caught = array();
+        $caught['type'] = false;
+        $caught['position'] = false;
+        $caught['image'] = false;
+
+        $i = 0; // number of catches
+        $none = false;
+
+        foreach ($bits as $bit) {
+            if ($i >= 3) {
+                return;
+            } // optimization bit
+            if ($bit === '') {
+                continue;
+            }
+            foreach ($caught as $key => $status) {
+                if ($status !== false) {
+                    continue;
+                }
+                $r = $this->info['list-style-' . $key]->validate($bit, $config, $context);
+                if ($r === false) {
+                    continue;
+                }
+                if ($r === 'none') {
+                    if ($none) {
+                        continue;
+                    } else {
+                        $none = true;
+                    }
+                    if ($key == 'image') {
+                        continue;
+                    }
+                }
+                $caught[$key] = $r;
+                $i++;
+                break;
+            }
+        }
+
+        if (!$i) {
+            return false;
+        }
+
+        $ret = array();
+
+        // construct type
+        if ($caught['type']) {
+            $ret[] = $caught['type'];
+        }
+
+        // construct image
+        if ($caught['image']) {
+            $ret[] = $caught['image'];
+        }
+
+        // construct position
+        if ($caught['position']) {
+            $ret[] = $caught['position'];
+        }
+
+        if (empty($ret)) {
+            return false;
+        }
+        return implode(' ', $ret);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Multiple.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php
similarity index 65%
rename from library/HTMLPurifier/AttrDef/CSS/Multiple.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php
index 4d62a40d7f..e707f871ca 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Multiple.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php
@@ -13,9 +13,9 @@
  */
 class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
 {
-
     /**
      * Instance of component definition to defer validation to.
+     * @type HTMLPurifier_AttrDef
      * @todo Make protected
      */
     public $single;
@@ -27,32 +27,45 @@ class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
     public $max;
 
     /**
-     * @param $single HTMLPurifier_AttrDef to multiply
-     * @param $max Max number of values allowed (usually four)
+     * @param HTMLPurifier_AttrDef $single HTMLPurifier_AttrDef to multiply
+     * @param int $max Max number of values allowed (usually four)
      */
-    public function __construct($single, $max = 4) {
+    public function __construct($single, $max = 4)
+    {
         $this->single = $single;
         $this->max = $max;
     }
 
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = $this->mungeRgb($this->parseCDATA($string));
+        if ($string === '') {
+            return false;
+        }
         $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
         $length = count($parts);
         $final = '';
         for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
-            if (ctype_space($parts[$i])) continue;
+            if (ctype_space($parts[$i])) {
+                continue;
+            }
             $result = $this->single->validate($parts[$i], $config, $context);
             if ($result !== false) {
                 $final .= $result . ' ';
                 $num++;
             }
         }
-        if ($final === '') return false;
+        if ($final === '') {
+            return false;
+        }
         return rtrim($final);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/Number.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Number.php
similarity index 55%
rename from library/HTMLPurifier/AttrDef/CSS/Number.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Number.php
index 3f99e12ec2..8edc159e72 100644
--- a/library/HTMLPurifier/AttrDef/CSS/Number.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Number.php
@@ -7,32 +7,44 @@ class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
 {
 
     /**
-     * Bool indicating whether or not only positive values allowed.
+     * Indicates whether or not only positive values are allowed.
+     * @type bool
      */
     protected $non_negative = false;
 
     /**
-     * @param $non_negative Bool indicating whether negatives are forbidden
+     * @param bool $non_negative indicates whether negatives are forbidden
      */
-    public function __construct($non_negative = false) {
+    public function __construct($non_negative = false)
+    {
         $this->non_negative = $non_negative;
     }
 
     /**
+     * @param string $number
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string|bool
      * @warning Some contexts do not pass $config, $context. These
      *          variables should not be used without checking HTMLPurifier_Length
      */
-    public function validate($number, $config, $context) {
-
+    public function validate($number, $config, $context)
+    {
         $number = $this->parseCDATA($number);
 
-        if ($number === '') return false;
-        if ($number === '0') return '0';
+        if ($number === '') {
+            return false;
+        }
+        if ($number === '0') {
+            return '0';
+        }
 
         $sign = '';
         switch ($number[0]) {
             case '-':
-                if ($this->non_negative) return false;
+                if ($this->non_negative) {
+                    return false;
+                }
                 $sign = '-';
             case '+':
                 $number = substr($number, 1);
@@ -44,14 +56,20 @@ class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
         }
 
         // Period is the only non-numeric character allowed
-        if (strpos($number, '.') === false) return false;
+        if (strpos($number, '.') === false) {
+            return false;
+        }
 
         list($left, $right) = explode('.', $number, 2);
 
-        if ($left === '' && $right === '') return false;
-        if ($left !== '' && !ctype_digit($left)) return false;
+        if ($left === '' && $right === '') {
+            return false;
+        }
+        if ($left !== '' && !ctype_digit($left)) {
+            return false;
+        }
 
-        $left  = ltrim($left,  '0');
+        $left = ltrim($left, '0');
         $right = rtrim($right, '0');
 
         if ($right === '') {
@@ -59,11 +77,8 @@ class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
         } elseif (!ctype_digit($right)) {
             return false;
         }
-
         return $sign . $left . '.' . $right;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Percentage.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Percentage.php
new file mode 100644
index 0000000000..f0f25c50a8
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Percentage.php
@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * Validates a Percentage as defined by the CSS spec.
+ */
+class HTMLPurifier_AttrDef_CSS_Percentage extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * Instance to defer number validation to.
+     * @type HTMLPurifier_AttrDef_CSS_Number
+     */
+    protected $number_def;
+
+    /**
+     * @param bool $non_negative Whether to forbid negative values
+     */
+    public function __construct($non_negative = false)
+    {
+        $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = $this->parseCDATA($string);
+
+        if ($string === '') {
+            return false;
+        }
+        $length = strlen($string);
+        if ($length === 1) {
+            return false;
+        }
+        if ($string[$length - 1] !== '%') {
+            return false;
+        }
+
+        $number = substr($string, 0, $length - 1);
+        $number = $this->number_def->validate($number, $config, $context);
+
+        if ($number === false) {
+            return false;
+        }
+        return "$number%";
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php
similarity index 69%
rename from library/HTMLPurifier/AttrDef/CSS/TextDecoration.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php
index 772c922d80..5fd4b7f7b4 100644
--- a/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php
@@ -8,8 +8,14 @@
 class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
 {
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         static $allowed_values = array(
             'line-through' => true,
             'overline' => true,
@@ -18,7 +24,9 @@ class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
 
         $string = strtolower($this->parseCDATA($string));
 
-        if ($string === 'none') return $string;
+        if ($string === 'none') {
+            return $string;
+        }
 
         $parts = explode(' ', $string);
         $final = '';
@@ -28,11 +36,11 @@ class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
             }
         }
         $final = rtrim($final);
-        if ($final === '') return false;
+        if ($final === '') {
+            return false;
+        }
         return $final;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/CSS/URI.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/URI.php
similarity index 58%
rename from library/HTMLPurifier/AttrDef/CSS/URI.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/URI.php
index 1df17dc25b..f9434230e2 100644
--- a/library/HTMLPurifier/AttrDef/CSS/URI.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/URI.php
@@ -12,25 +12,39 @@
 class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
 {
 
-    public function __construct() {
+    public function __construct()
+    {
         parent::__construct(true); // always embedded
     }
 
-    public function validate($uri_string, $config, $context) {
+    /**
+     * @param string $uri_string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($uri_string, $config, $context)
+    {
         // parse the URI out of the string and then pass it onto
         // the parent object
 
         $uri_string = $this->parseCDATA($uri_string);
-        if (strpos($uri_string, 'url(') !== 0) return false;
+        if (strpos($uri_string, 'url(') !== 0) {
+            return false;
+        }
         $uri_string = substr($uri_string, 4);
         $new_length = strlen($uri_string) - 1;
-        if ($uri_string[$new_length] != ')') return false;
+        if ($uri_string[$new_length] != ')') {
+            return false;
+        }
         $uri = trim(substr($uri_string, 0, $new_length));
 
         if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
             $quote = $uri[0];
             $new_length = strlen($uri) - 1;
-            if ($uri[$new_length] !== $quote) return false;
+            if ($uri[$new_length] !== $quote) {
+                return false;
+            }
             $uri = substr($uri, 1, $new_length - 1);
         }
 
@@ -38,15 +52,23 @@ class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
 
         $result = parent::validate($uri, $config, $context);
 
-        if ($result === false) return false;
+        if ($result === false) {
+            return false;
+        }
 
         // extra sanity check; should have been done by URI
         $result = str_replace(array('"', "\\", "\n", "\x0c", "\r"), "", $result);
 
+        // suspicious characters are ()'; we're going to percent encode
+        // them for safety.
+        $result = str_replace(array('(', ')', "'"), array('%28', '%29', '%27'), $result);
+
+        // there's an extra bug where ampersands lose their escaping on
+        // an innerHTML cycle, so a very unlucky query parameter could
+        // then change the meaning of the URL.  Unfortunately, there's
+        // not much we can do about that...
         return "url(\"$result\")";
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Clone.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Clone.php
new file mode 100644
index 0000000000..6698a00c01
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Clone.php
@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Dummy AttrDef that mimics another AttrDef, BUT it generates clones
+ * with make.
+ */
+class HTMLPurifier_AttrDef_Clone extends HTMLPurifier_AttrDef
+{
+    /**
+     * What we're cloning.
+     * @type HTMLPurifier_AttrDef
+     */
+    protected $clone;
+
+    /**
+     * @param HTMLPurifier_AttrDef $clone
+     */
+    public function __construct($clone)
+    {
+        $this->clone = $clone;
+    }
+
+    /**
+     * @param string $v
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($v, $config, $context)
+    {
+        return $this->clone->validate($v, $config, $context);
+    }
+
+    /**
+     * @param string $string
+     * @return HTMLPurifier_AttrDef
+     */
+    public function make($string)
+    {
+        return clone $this->clone;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/Enum.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Enum.php
similarity index 70%
rename from library/HTMLPurifier/AttrDef/Enum.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Enum.php
index 5d603ebcc6..8abda7f6e2 100644
--- a/library/HTMLPurifier/AttrDef/Enum.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Enum.php
@@ -12,9 +12,10 @@ class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
 
     /**
      * Lookup table of valid values.
+     * @type array
      * @todo Make protected
      */
-    public $valid_values   = array();
+    public $valid_values = array();
 
     /**
      * Bool indicating whether or not enumeration is case sensitive.
@@ -23,17 +24,23 @@ class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
     protected $case_sensitive = false; // values according to W3C spec
 
     /**
-     * @param $valid_values List of valid values
-     * @param $case_sensitive Bool indicating whether or not case sensitive
+     * @param array $valid_values List of valid values
+     * @param bool $case_sensitive Whether or not case sensitive
      */
-    public function __construct(
-        $valid_values = array(), $case_sensitive = false
-    ) {
+    public function __construct($valid_values = array(), $case_sensitive = false)
+    {
         $this->valid_values = array_flip($valid_values);
         $this->case_sensitive = $case_sensitive;
     }
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $string = trim($string);
         if (!$this->case_sensitive) {
             // we may want to do full case-insensitive libraries
@@ -45,11 +52,13 @@ class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
     }
 
     /**
-     * @param $string In form of comma-delimited list of case-insensitive
+     * @param string $string In form of comma-delimited list of case-insensitive
      *      valid values. Example: "foo,bar,baz". Prepend "s:" to make
      *      case sensitive
+     * @return HTMLPurifier_AttrDef_Enum
      */
-    public function make($string) {
+    public function make($string)
+    {
         if (strlen($string) > 2 && $string[0] == 's' && $string[1] == ':') {
             $string = substr($string, 2);
             $sensitive = true;
@@ -59,7 +68,6 @@ class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
         $values = explode(',', $string);
         return new HTMLPurifier_AttrDef_Enum($values, $sensitive);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Bool.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Bool.php
new file mode 100644
index 0000000000..dea15d2cd2
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Bool.php
@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Validates a boolean attribute
+ */
+class HTMLPurifier_AttrDef_HTML_Bool extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @type bool
+     */
+    protected $name;
+
+    /**
+     * @type bool
+     */
+    public $minimized = true;
+
+    /**
+     * @param bool $name
+     */
+    public function __construct($name = false)
+    {
+        $this->name = $name;
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $string Name of attribute
+     * @return HTMLPurifier_AttrDef_HTML_Bool
+     */
+    public function make($string)
+    {
+        return new HTMLPurifier_AttrDef_HTML_Bool($string);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Class.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Class.php
similarity index 66%
rename from library/HTMLPurifier/AttrDef/HTML/Class.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Class.php
index 370068d975..d5013488fc 100644
--- a/library/HTMLPurifier/AttrDef/HTML/Class.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Class.php
@@ -5,7 +5,14 @@
  */
 class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens
 {
-    protected function split($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    protected function split($string, $config, $context)
+    {
         // really, this twiddle should be lazy loaded
         $name = $config->getDefinition('HTML')->doctype->name;
         if ($name == "XHTML 1.1" || $name == "XHTML 2.0") {
@@ -14,13 +21,20 @@ class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens
             return preg_split('/\s+/', $string);
         }
     }
-    protected function filter($tokens, $config, $context) {
+
+    /**
+     * @param array $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    protected function filter($tokens, $config, $context)
+    {
         $allowed = $config->get('Attr.AllowedClasses');
         $forbidden = $config->get('Attr.ForbiddenClasses');
         $ret = array();
         foreach ($tokens as $token) {
-            if (
-                ($allowed === null || isset($allowed[$token])) &&
+            if (($allowed === null || isset($allowed[$token])) &&
                 !isset($forbidden[$token]) &&
                 // We need this O(n) check because of PHP's array
                 // implementation that casts -0 to 0.
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php
new file mode 100644
index 0000000000..946ebb7820
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * Validates a color according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        static $colors = null;
+        if ($colors === null) {
+            $colors = $config->get('Core.ColorKeywords');
+        }
+
+        $string = trim($string);
+
+        if (empty($string)) {
+            return false;
+        }
+        $lower = strtolower($string);
+        if (isset($colors[$lower])) {
+            return $colors[$lower];
+        }
+        if ($string[0] === '#') {
+            $hex = substr($string, 1);
+        } else {
+            $hex = $string;
+        }
+
+        $length = strlen($hex);
+        if ($length !== 3 && $length !== 6) {
+            return false;
+        }
+        if (!ctype_xdigit($hex)) {
+            return false;
+        }
+        if ($length === 3) {
+            $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
+        }
+        return "#$hex";
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php
new file mode 100644
index 0000000000..d79ba12b3f
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php
@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * Special-case enum attribute definition that lazy loads allowed frame targets
+ */
+class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum
+{
+
+    /**
+     * @type array
+     */
+    public $valid_values = false; // uninitialized value
+
+    /**
+     * @type bool
+     */
+    protected $case_sensitive = false;
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        if ($this->valid_values === false) {
+            $this->valid_values = $config->get('Attr.AllowedFrameTargets');
+        }
+        return parent::validate($string, $config, $context);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/ID.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/ID.php
new file mode 100644
index 0000000000..3d86efb44c
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/ID.php
@@ -0,0 +1,105 @@
+<?php
+
+/**
+ * Validates the HTML attribute ID.
+ * @warning Even though this is the id processor, it
+ *          will ignore the directive Attr:IDBlacklist, since it will only
+ *          go according to the ID accumulator. Since the accumulator is
+ *          automatically generated, it will have already absorbed the
+ *          blacklist. If you're hacking around, make sure you use load()!
+ */
+
+class HTMLPurifier_AttrDef_HTML_ID extends HTMLPurifier_AttrDef
+{
+
+    // selector is NOT a valid thing to use for IDREFs, because IDREFs
+    // *must* target IDs that exist, whereas selector #ids do not.
+
+    /**
+     * Determines whether or not we're validating an ID in a CSS
+     * selector context.
+     * @type bool
+     */
+    protected $selector;
+
+    /**
+     * @param bool $selector
+     */
+    public function __construct($selector = false)
+    {
+        $this->selector = $selector;
+    }
+
+    /**
+     * @param string $id
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($id, $config, $context)
+    {
+        if (!$this->selector && !$config->get('Attr.EnableID')) {
+            return false;
+        }
+
+        $id = trim($id); // trim it first
+
+        if ($id === '') {
+            return false;
+        }
+
+        $prefix = $config->get('Attr.IDPrefix');
+        if ($prefix !== '') {
+            $prefix .= $config->get('Attr.IDPrefixLocal');
+            // prevent re-appending the prefix
+            if (strpos($id, $prefix) !== 0) {
+                $id = $prefix . $id;
+            }
+        } elseif ($config->get('Attr.IDPrefixLocal') !== '') {
+            trigger_error(
+                '%Attr.IDPrefixLocal cannot be used unless ' .
+                '%Attr.IDPrefix is set',
+                E_USER_WARNING
+            );
+        }
+
+        if (!$this->selector) {
+            $id_accumulator =& $context->get('IDAccumulator');
+            if (isset($id_accumulator->ids[$id])) {
+                return false;
+            }
+        }
+
+        // we purposely avoid using regex, hopefully this is faster
+
+        if (ctype_alpha($id)) {
+            $result = true;
+        } else {
+            if (!ctype_alpha(@$id[0])) {
+                return false;
+            }
+            // primitive style of regexps, I suppose
+            $trim = trim(
+                $id,
+                'A..Za..z0..9:-._'
+            );
+            $result = ($trim === '');
+        }
+
+        $regexp = $config->get('Attr.IDBlacklistRegexp');
+        if ($regexp && preg_match($regexp, $id)) {
+            return false;
+        }
+
+        if (!$this->selector && $result) {
+            $id_accumulator->add($id);
+        }
+
+        // if no change was made to the ID, return the result
+        // else, return the new id if stripping whitespace made it
+        //     valid, or return false.
+        return $result ? $id : false;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Length.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Length.php
new file mode 100644
index 0000000000..1c4006fbbd
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Length.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * Validates the HTML type length (not to be confused with CSS's length).
+ *
+ * This accepts integer pixels or percentages as lengths for certain
+ * HTML attributes.
+ */
+
+class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
+{
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = trim($string);
+        if ($string === '') {
+            return false;
+        }
+
+        $parent_result = parent::validate($string, $config, $context);
+        if ($parent_result !== false) {
+            return $parent_result;
+        }
+
+        $length = strlen($string);
+        $last_char = $string[$length - 1];
+
+        if ($last_char !== '%') {
+            return false;
+        }
+
+        $points = substr($string, 0, $length - 1);
+
+        if (!is_numeric($points)) {
+            return false;
+        }
+
+        $points = (int)$points;
+
+        if ($points < 0) {
+            return '0%';
+        }
+        if ($points > 100) {
+            return '100%';
+        }
+        return ((string)$points) . '%';
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php
similarity index 56%
rename from library/HTMLPurifier/AttrDef/HTML/LinkTypes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php
index 76d25ed088..63fa04c15c 100644
--- a/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php
@@ -9,26 +9,44 @@
 class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef
 {
 
-    /** Name config attribute to pull. */
+    /**
+     * Name config attribute to pull.
+     * @type string
+     */
     protected $name;
 
-    public function __construct($name) {
+    /**
+     * @param string $name
+     */
+    public function __construct($name)
+    {
         $configLookup = array(
             'rel' => 'AllowedRel',
             'rev' => 'AllowedRev'
         );
         if (!isset($configLookup[$name])) {
-            trigger_error('Unrecognized attribute name for link '.
-                'relationship.', E_USER_ERROR);
+            trigger_error(
+                'Unrecognized attribute name for link ' .
+                'relationship.',
+                E_USER_ERROR
+            );
             return;
         }
         $this->name = $configLookup[$name];
     }
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $allowed = $config->get('Attr.' . $this->name);
-        if (empty($allowed)) return false;
+        if (empty($allowed)) {
+            return false;
+        }
 
         $string = $this->parseCDATA($string);
         $parts = explode(' ', $string);
@@ -37,17 +55,18 @@ class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef
         $ret_lookup = array();
         foreach ($parts as $part) {
             $part = strtolower(trim($part));
-            if (!isset($allowed[$part])) continue;
+            if (!isset($allowed[$part])) {
+                continue;
+            }
             $ret_lookup[$part] = true;
         }
 
-        if (empty($ret_lookup)) return false;
+        if (empty($ret_lookup)) {
+            return false;
+        }
         $string = implode(' ', array_keys($ret_lookup));
-
         return $string;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/MultiLength.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/MultiLength.php
new file mode 100644
index 0000000000..bbb20f2f80
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/MultiLength.php
@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * Validates a MultiLength as defined by the HTML spec.
+ *
+ * A multilength is either a integer (pixel count), a percentage, or
+ * a relative number.
+ */
+class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
+{
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = trim($string);
+        if ($string === '') {
+            return false;
+        }
+
+        $parent_result = parent::validate($string, $config, $context);
+        if ($parent_result !== false) {
+            return $parent_result;
+        }
+
+        $length = strlen($string);
+        $last_char = $string[$length - 1];
+
+        if ($last_char !== '*') {
+            return false;
+        }
+
+        $int = substr($string, 0, $length - 1);
+
+        if ($int == '') {
+            return '*';
+        }
+        if (!is_numeric($int)) {
+            return false;
+        }
+
+        $int = (int)$int;
+        if ($int < 0) {
+            return false;
+        }
+        if ($int == 0) {
+            return '0';
+        }
+        if ($int == 1) {
+            return '*';
+        }
+        return ((string)$int) . '*';
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php
similarity index 55%
rename from library/HTMLPurifier/AttrDef/HTML/Nmtokens.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php
index aa34120bd2..f79683b4fc 100644
--- a/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php
@@ -6,24 +6,38 @@
 class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
 {
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $string = trim($string);
 
         // early abort: '' and '0' (strings that convert to false) are invalid
-        if (!$string) return false;
+        if (!$string) {
+            return false;
+        }
 
         $tokens = $this->split($string, $config, $context);
         $tokens = $this->filter($tokens, $config, $context);
-        if (empty($tokens)) return false;
+        if (empty($tokens)) {
+            return false;
+        }
         return implode(' ', $tokens);
-
     }
 
     /**
      * Splits a space separated list of tokens into its constituent parts.
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
      */
-    protected function split($string, $config, $context) {
+    protected function split($string, $config, $context)
+    {
         // OPTIMIZABLE!
         // do the preg_match, capture all subpatterns for reformulation
 
@@ -31,9 +45,9 @@ class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
         // escaping because I don't know how to do that with regexps
         // and plus it would complicate optimization efforts (you never
         // see that anyway).
-        $pattern = '/(?:(?<=\s)|\A)'. // look behind for space or string start
-                   '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)'.
-                   '(?:(?=\s)|\z)/'; // look ahead for space or string end
+        $pattern = '/(?:(?<=\s)|\A)' . // look behind for space or string start
+            '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)' .
+            '(?:(?=\s)|\z)/'; // look ahead for space or string end
         preg_match_all($pattern, $string, $matches);
         return $matches[1];
     }
@@ -42,11 +56,15 @@ class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
      * Template method for removing certain tokens based on arbitrary criteria.
      * @note If we wanted to be really functional, we'd do an array_filter
      *       with a callback. But... we're not.
+     * @param array $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
      */
-    protected function filter($tokens, $config, $context) {
+    protected function filter($tokens, $config, $context)
+    {
         return $tokens;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Pixels.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Pixels.php
new file mode 100644
index 0000000000..a1d019e095
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Pixels.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * Validates an integer representation of pixels according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @type int
+     */
+    protected $max;
+
+    /**
+     * @param int $max
+     */
+    public function __construct($max = null)
+    {
+        $this->max = $max;
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = trim($string);
+        if ($string === '0') {
+            return $string;
+        }
+        if ($string === '') {
+            return false;
+        }
+        $length = strlen($string);
+        if (substr($string, $length - 2) == 'px') {
+            $string = substr($string, 0, $length - 2);
+        }
+        if (!is_numeric($string)) {
+            return false;
+        }
+        $int = (int)$string;
+
+        if ($int < 0) {
+            return '0';
+        }
+
+        // upper-bound value, extremely high values can
+        // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
+        // WARNING, above link WILL crash you if you're using Windows
+
+        if ($this->max !== null && $int > $this->max) {
+            return (string)$this->max;
+        }
+        return (string)$int;
+    }
+
+    /**
+     * @param string $string
+     * @return HTMLPurifier_AttrDef
+     */
+    public function make($string)
+    {
+        if ($string === '') {
+            $max = null;
+        } else {
+            $max = (int)$string;
+        }
+        $class = get_class($this);
+        return new $class($max);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/Integer.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php
similarity index 55%
rename from library/HTMLPurifier/AttrDef/Integer.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php
index d59738d2a2..400e707d2f 100644
--- a/library/HTMLPurifier/AttrDef/Integer.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php
@@ -11,17 +11,20 @@ class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef
 {
 
     /**
-     * Bool indicating whether or not negative values are allowed
+     * Whether or not negative values are allowed.
+     * @type bool
      */
     protected $negative = true;
 
     /**
-     * Bool indicating whether or not zero is allowed
+     * Whether or not zero is allowed.
+     * @type bool
      */
     protected $zero = true;
 
     /**
-     * Bool indicating whether or not positive values are allowed
+     * Whether or not positive values are allowed.
+     * @type bool
      */
     protected $positive = true;
 
@@ -30,44 +33,59 @@ class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef
      * @param $zero Bool indicating whether or not zero is allowed
      * @param $positive Bool indicating whether or not positive values are allowed
      */
-    public function __construct(
-        $negative = true, $zero = true, $positive = true
-    ) {
+    public function __construct($negative = true, $zero = true, $positive = true)
+    {
         $this->negative = $negative;
-        $this->zero     = $zero;
+        $this->zero = $zero;
         $this->positive = $positive;
     }
 
-    public function validate($integer, $config, $context) {
-
+    /**
+     * @param string $integer
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($integer, $config, $context)
+    {
         $integer = $this->parseCDATA($integer);
-        if ($integer === '') return false;
+        if ($integer === '') {
+            return false;
+        }
 
         // we could possibly simply typecast it to integer, but there are
         // certain fringe cases that must not return an integer.
 
         // clip leading sign
-        if ( $this->negative && $integer[0] === '-' ) {
+        if ($this->negative && $integer[0] === '-') {
             $digits = substr($integer, 1);
-            if ($digits === '0') $integer = '0'; // rm minus sign for zero
-        } elseif( $this->positive && $integer[0] === '+' ) {
+            if ($digits === '0') {
+                $integer = '0';
+            } // rm minus sign for zero
+        } elseif ($this->positive && $integer[0] === '+') {
             $digits = $integer = substr($integer, 1); // rm unnecessary plus
         } else {
             $digits = $integer;
         }
 
         // test if it's numeric
-        if (!ctype_digit($digits)) return false;
+        if (!ctype_digit($digits)) {
+            return false;
+        }
 
         // perform scope tests
-        if (!$this->zero     && $integer == 0) return false;
-        if (!$this->positive && $integer > 0) return false;
-        if (!$this->negative && $integer < 0) return false;
+        if (!$this->zero && $integer == 0) {
+            return false;
+        }
+        if (!$this->positive && $integer > 0) {
+            return false;
+        }
+        if (!$this->negative && $integer < 0) {
+            return false;
+        }
 
         return $integer;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/Lang.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Lang.php
similarity index 67%
rename from library/HTMLPurifier/AttrDef/Lang.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Lang.php
index 10e6da56db..2a55cea642 100644
--- a/library/HTMLPurifier/AttrDef/Lang.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Lang.php
@@ -7,15 +7,25 @@
 class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
 {
 
-    public function validate($string, $config, $context) {
-
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $string = trim($string);
-        if (!$string) return false;
+        if (!$string) {
+            return false;
+        }
 
         $subtags = explode('-', $string);
         $num_subtags = count($subtags);
 
-        if ($num_subtags == 0) return false; // sanity check
+        if ($num_subtags == 0) { // sanity check
+            return false;
+        }
 
         // process primary subtag : $subtags[0]
         $length = strlen($subtags[0]);
@@ -23,15 +33,15 @@ class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
             case 0:
                 return false;
             case 1:
-                if (! ($subtags[0] == 'x' || $subtags[0] == 'i') ) {
+                if (!($subtags[0] == 'x' || $subtags[0] == 'i')) {
                     return false;
                 }
                 break;
             case 2:
             case 3:
-                if (! ctype_alpha($subtags[0]) ) {
+                if (!ctype_alpha($subtags[0])) {
                     return false;
-                } elseif (! ctype_lower($subtags[0]) ) {
+                } elseif (!ctype_lower($subtags[0])) {
                     $subtags[0] = strtolower($subtags[0]);
                 }
                 break;
@@ -40,17 +50,23 @@ class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
         }
 
         $new_string = $subtags[0];
-        if ($num_subtags == 1) return $new_string;
+        if ($num_subtags == 1) {
+            return $new_string;
+        }
 
         // process second subtag : $subtags[1]
         $length = strlen($subtags[1]);
         if ($length == 0 || ($length == 1 && $subtags[1] != 'x') || $length > 8 || !ctype_alnum($subtags[1])) {
             return $new_string;
         }
-        if (!ctype_lower($subtags[1])) $subtags[1] = strtolower($subtags[1]);
+        if (!ctype_lower($subtags[1])) {
+            $subtags[1] = strtolower($subtags[1]);
+        }
 
         $new_string .= '-' . $subtags[1];
-        if ($num_subtags == 2) return $new_string;
+        if ($num_subtags == 2) {
+            return $new_string;
+        }
 
         // process all other subtags, index 2 and up
         for ($i = 2; $i < $num_subtags; $i++) {
@@ -63,11 +79,8 @@ class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
             }
             $new_string .= '-' . $subtags[$i];
         }
-
         return $new_string;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/Switch.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Switch.php
similarity index 62%
rename from library/HTMLPurifier/AttrDef/Switch.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Switch.php
index c9e3ed193e..c7eb3199a4 100644
--- a/library/HTMLPurifier/AttrDef/Switch.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Switch.php
@@ -6,21 +6,41 @@
 class HTMLPurifier_AttrDef_Switch
 {
 
+    /**
+     * @type string
+     */
     protected $tag;
-    protected $withTag, $withoutTag;
+
+    /**
+     * @type HTMLPurifier_AttrDef
+     */
+    protected $withTag;
+
+    /**
+     * @type HTMLPurifier_AttrDef
+     */
+    protected $withoutTag;
 
     /**
      * @param string $tag Tag name to switch upon
      * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
      * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
      */
-    public function __construct($tag, $with_tag, $without_tag) {
+    public function __construct($tag, $with_tag, $without_tag)
+    {
         $this->tag = $tag;
         $this->withTag = $with_tag;
         $this->withoutTag = $without_tag;
     }
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         $token = $context->get('CurrentToken', true);
         if (!$token || $token->name !== $this->tag) {
             return $this->withoutTag->validate($string, $config, $context);
@@ -28,7 +48,6 @@ class HTMLPurifier_AttrDef_Switch
             return $this->withTag->validate($string, $config, $context);
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Text.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Text.php
new file mode 100644
index 0000000000..4553a4ea9b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Text.php
@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Validates arbitrary text according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_Text extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        return $this->parseCDATA($string);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/URI.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI.php
similarity index 53%
rename from library/HTMLPurifier/AttrDef/URI.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI.php
index 01a6d83e95..c1cd89772c 100644
--- a/library/HTMLPurifier/AttrDef/URI.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI.php
@@ -7,31 +7,54 @@
 class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
 {
 
+    /**
+     * @type HTMLPurifier_URIParser
+     */
     protected $parser;
+
+    /**
+     * @type bool
+     */
     protected $embedsResource;
 
     /**
-     * @param $embeds_resource_resource Does the URI here result in an extra HTTP request?
+     * @param bool $embeds_resource Does the URI here result in an extra HTTP request?
      */
-    public function __construct($embeds_resource = false) {
+    public function __construct($embeds_resource = false)
+    {
         $this->parser = new HTMLPurifier_URIParser();
-        $this->embedsResource = (bool) $embeds_resource;
+        $this->embedsResource = (bool)$embeds_resource;
     }
 
-    public function make($string) {
-        $embeds = (bool) $string;
+    /**
+     * @param string $string
+     * @return HTMLPurifier_AttrDef_URI
+     */
+    public function make($string)
+    {
+        $embeds = ($string === 'embedded');
         return new HTMLPurifier_AttrDef_URI($embeds);
     }
 
-    public function validate($uri, $config, $context) {
-
-        if ($config->get('URI.Disable')) return false;
+    /**
+     * @param string $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($uri, $config, $context)
+    {
+        if ($config->get('URI.Disable')) {
+            return false;
+        }
 
         $uri = $this->parseCDATA($uri);
 
         // parse the URI
         $uri = $this->parser->parse($uri);
-        if ($uri === false) return false;
+        if ($uri === false) {
+            return false;
+        }
 
         // add embedded flag to context for validators
         $context->register('EmbeddedURI', $this->embedsResource);
@@ -41,23 +64,35 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
 
             // generic validation
             $result = $uri->validate($config, $context);
-            if (!$result) break;
+            if (!$result) {
+                break;
+            }
 
             // chained filtering
             $uri_def = $config->getDefinition('URI');
             $result = $uri_def->filter($uri, $config, $context);
-            if (!$result) break;
+            if (!$result) {
+                break;
+            }
 
             // scheme-specific validation
             $scheme_obj = $uri->getSchemeObj($config, $context);
-            if (!$scheme_obj) break;
-            if ($this->embedsResource && !$scheme_obj->browsable) break;
+            if (!$scheme_obj) {
+                break;
+            }
+            if ($this->embedsResource && !$scheme_obj->browsable) {
+                break;
+            }
             $result = $scheme_obj->validate($uri, $config, $context);
-            if (!$result) break;
+            if (!$result) {
+                break;
+            }
 
             // Post chained filtering
             $result = $uri_def->postFilter($uri, $config, $context);
-            if (!$result) break;
+            if (!$result) {
+                break;
+            }
 
             // survived gauntlet
             $ok = true;
@@ -65,13 +100,12 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
         } while (false);
 
         $context->destroy('EmbeddedURI');
-        if (!$ok) return false;
-
+        if (!$ok) {
+            return false;
+        }
         // back to string
         return $uri->toString();
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/URI/Email.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email.php
similarity index 73%
rename from library/HTMLPurifier/AttrDef/URI/Email.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email.php
index bfee9d166c..daf32b7643 100644
--- a/library/HTMLPurifier/AttrDef/URI/Email.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email.php
@@ -5,8 +5,11 @@ abstract class HTMLPurifier_AttrDef_URI_Email extends HTMLPurifier_AttrDef
 
     /**
      * Unpacks a mailbox into its display-name and address
+     * @param string $string
+     * @return mixed
      */
-    function unpack($string) {
+    public function unpack($string)
+    {
         // needs to be implemented
     }
 
diff --git a/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
similarity index 65%
rename from library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
index 94c715ab43..52c0d59683 100644
--- a/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
@@ -7,15 +7,23 @@
 class HTMLPurifier_AttrDef_URI_Email_SimpleCheck extends HTMLPurifier_AttrDef_URI_Email
 {
 
-    public function validate($string, $config, $context) {
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
         // no support for named mailboxes i.e. "Bob <bob@example.com>"
         // that needs more percent encoding to be done
-        if ($string == '') return false;
+        if ($string == '') {
+            return false;
+        }
         $string = trim($string);
         $result = preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $string);
         return $result ? $string : false;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Host.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Host.php
new file mode 100644
index 0000000000..e7df800b1e
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Host.php
@@ -0,0 +1,128 @@
+<?php
+
+/**
+ * Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
+ */
+class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
+{
+
+    /**
+     * IPv4 sub-validator.
+     * @type HTMLPurifier_AttrDef_URI_IPv4
+     */
+    protected $ipv4;
+
+    /**
+     * IPv6 sub-validator.
+     * @type HTMLPurifier_AttrDef_URI_IPv6
+     */
+    protected $ipv6;
+
+    public function __construct()
+    {
+        $this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
+        $this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $length = strlen($string);
+        // empty hostname is OK; it's usually semantically equivalent:
+        // the default host as defined by a URI scheme is used:
+        //
+        //      If the URI scheme defines a default for host, then that
+        //      default applies when the host subcomponent is undefined
+        //      or when the registered name is empty (zero length).
+        if ($string === '') {
+            return '';
+        }
+        if ($length > 1 && $string[0] === '[' && $string[$length - 1] === ']') {
+            //IPv6
+            $ip = substr($string, 1, $length - 2);
+            $valid = $this->ipv6->validate($ip, $config, $context);
+            if ($valid === false) {
+                return false;
+            }
+            return '[' . $valid . ']';
+        }
+
+        // need to do checks on unusual encodings too
+        $ipv4 = $this->ipv4->validate($string, $config, $context);
+        if ($ipv4 !== false) {
+            return $ipv4;
+        }
+
+        // A regular domain name.
+
+        // This doesn't match I18N domain names, but we don't have proper IRI support,
+        // so force users to insert Punycode.
+
+        // There is not a good sense in which underscores should be
+        // allowed, since it's technically not! (And if you go as
+        // far to allow everything as specified by the DNS spec...
+        // well, that's literally everything, modulo some space limits
+        // for the components and the overall name (which, by the way,
+        // we are NOT checking!).  So we (arbitrarily) decide this:
+        // let's allow underscores wherever we would have allowed
+        // hyphens, if they are enabled.  This is a pretty good match
+        // for browser behavior, for example, a large number of browsers
+        // cannot handle foo_.example.com, but foo_bar.example.com is
+        // fairly well supported.
+        $underscore = $config->get('Core.AllowHostnameUnderscore') ? '_' : '';
+
+        // The productions describing this are:
+        $a   = '[a-z]';     // alpha
+        $an  = '[a-z0-9]';  // alphanum
+        $and = "[a-z0-9-$underscore]"; // alphanum | "-"
+        // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
+        $domainlabel = "$an($and*$an)?";
+        // toplabel    = alpha | alpha *( alphanum | "-" ) alphanum
+        $toplabel = "$a($and*$an)?";
+        // hostname    = *( domainlabel "." ) toplabel [ "." ]
+        if (preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string)) {
+            return $string;
+        }
+
+        // If we have Net_IDNA2 support, we can support IRIs by
+        // punycoding them. (This is the most portable thing to do,
+        // since otherwise we have to assume browsers support
+
+        if ($config->get('Core.EnableIDNA')) {
+            $idna = new Net_IDNA2(array('encoding' => 'utf8', 'overlong' => false, 'strict' => true));
+            // we need to encode each period separately
+            $parts = explode('.', $string);
+            try {
+                $new_parts = array();
+                foreach ($parts as $part) {
+                    $encodable = false;
+                    for ($i = 0, $c = strlen($part); $i < $c; $i++) {
+                        if (ord($part[$i]) > 0x7a) {
+                            $encodable = true;
+                            break;
+                        }
+                    }
+                    if (!$encodable) {
+                        $new_parts[] = $part;
+                    } else {
+                        $new_parts[] = $idna->encode($part);
+                    }
+                }
+                $string = implode('.', $new_parts);
+                if (preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string)) {
+                    return $string;
+                }
+            } catch (Exception $e) {
+                // XXX error reporting
+            }
+        }
+        return false;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrDef/URI/IPv4.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv4.php
similarity index 51%
rename from library/HTMLPurifier/AttrDef/URI/IPv4.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv4.php
index ec4cf591b8..30ac16c9e7 100644
--- a/library/HTMLPurifier/AttrDef/URI/IPv4.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv4.php
@@ -8,32 +8,38 @@ class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
 {
 
     /**
-     * IPv4 regex, protected so that IPv6 can reuse it
+     * IPv4 regex, protected so that IPv6 can reuse it.
+     * @type string
      */
     protected $ip4;
 
-    public function validate($aIP, $config, $context) {
-
-        if (!$this->ip4) $this->_loadRegex();
-
-        if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
-        {
-                return $aIP;
+    /**
+     * @param string $aIP
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($aIP, $config, $context)
+    {
+        if (!$this->ip4) {
+            $this->_loadRegex();
         }
 
+        if (preg_match('#^' . $this->ip4 . '$#s', $aIP)) {
+            return $aIP;
+        }
         return false;
-
     }
 
     /**
      * Lazy load function to prevent regex from being stuffed in
      * cache.
      */
-    protected function _loadRegex() {
+    protected function _loadRegex()
+    {
         $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
         $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv6.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv6.php
new file mode 100644
index 0000000000..f243793eeb
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv6.php
@@ -0,0 +1,89 @@
+<?php
+
+/**
+ * Validates an IPv6 address.
+ * @author Feyd @ forums.devnetwork.net (public domain)
+ * @note This function requires brackets to have been removed from address
+ *       in URI.
+ */
+class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
+{
+
+    /**
+     * @param string $aIP
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($aIP, $config, $context)
+    {
+        if (!$this->ip4) {
+            $this->_loadRegex();
+        }
+
+        $original = $aIP;
+
+        $hex = '[0-9a-fA-F]';
+        $blk = '(?:' . $hex . '{1,4})';
+        $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))'; // /0 - /128
+
+        //      prefix check
+        if (strpos($aIP, '/') !== false) {
+            if (preg_match('#' . $pre . '$#s', $aIP, $find)) {
+                $aIP = substr($aIP, 0, 0 - strlen($find[0]));
+                unset($find);
+            } else {
+                return false;
+            }
+        }
+
+        //      IPv4-compatiblity check
+        if (preg_match('#(?<=:' . ')' . $this->ip4 . '$#s', $aIP, $find)) {
+            $aIP = substr($aIP, 0, 0 - strlen($find[0]));
+            $ip = explode('.', $find[0]);
+            $ip = array_map('dechex', $ip);
+            $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
+            unset($find, $ip);
+        }
+
+        //      compression check
+        $aIP = explode('::', $aIP);
+        $c = count($aIP);
+        if ($c > 2) {
+            return false;
+        } elseif ($c == 2) {
+            list($first, $second) = $aIP;
+            $first = explode(':', $first);
+            $second = explode(':', $second);
+
+            if (count($first) + count($second) > 8) {
+                return false;
+            }
+
+            while (count($first) < 8) {
+                array_push($first, '0');
+            }
+
+            array_splice($first, 8 - count($second), 8, $second);
+            $aIP = $first;
+            unset($first, $second);
+        } else {
+            $aIP = explode(':', $aIP[0]);
+        }
+        $c = count($aIP);
+
+        if ($c != 8) {
+            return false;
+        }
+
+        //      All the pieces should be 16-bit hex strings. Are they?
+        foreach ($aIP as $piece) {
+            if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece))) {
+                return false;
+            }
+        }
+        return $original;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform.php
similarity index 63%
rename from library/HTMLPurifier/AttrTransform.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform.php
index e61d3e01b6..b428331f15 100644
--- a/library/HTMLPurifier/AttrTransform.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform.php
@@ -20,37 +20,41 @@ abstract class HTMLPurifier_AttrTransform
     /**
      * Abstract: makes changes to the attributes dependent on multiple values.
      *
-     * @param $attr Assoc array of attributes, usually from
+     * @param array $attr Assoc array of attributes, usually from
      *              HTMLPurifier_Token_Tag::$attr
-     * @param $config Mandatory HTMLPurifier_Config object.
-     * @param $context Mandatory HTMLPurifier_Context object
-     * @returns Processed attribute array.
+     * @param HTMLPurifier_Config $config Mandatory HTMLPurifier_Config object.
+     * @param HTMLPurifier_Context $context Mandatory HTMLPurifier_Context object
+     * @return array Processed attribute array.
      */
     abstract public function transform($attr, $config, $context);
 
     /**
      * Prepends CSS properties to the style attribute, creating the
      * attribute if it doesn't exist.
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $css CSS to prepend
+     * @param array &$attr Attribute array to process (passed by reference)
+     * @param string $css CSS to prepend
      */
-    public function prependCSS(&$attr, $css) {
+    public function prependCSS(&$attr, $css)
+    {
         $attr['style'] = isset($attr['style']) ? $attr['style'] : '';
         $attr['style'] = $css . $attr['style'];
     }
 
     /**
      * Retrieves and removes an attribute
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $key Key of attribute to confiscate
+     * @param array &$attr Attribute array to process (passed by reference)
+     * @param mixed $key Key of attribute to confiscate
+     * @return mixed
      */
-    public function confiscateAttr(&$attr, $key) {
-        if (!isset($attr[$key])) return null;
+    public function confiscateAttr(&$attr, $key)
+    {
+        if (!isset($attr[$key])) {
+            return null;
+        }
         $value = $attr[$key];
         unset($attr[$key]);
         return $value;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Background.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Background.php
similarity index 55%
rename from library/HTMLPurifier/AttrTransform/Background.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Background.php
index 0e1ff24a3e..2f72869a5e 100644
--- a/library/HTMLPurifier/AttrTransform/Background.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Background.php
@@ -3,21 +3,26 @@
 /**
  * Pre-transform that changes proprietary background attribute to CSS.
  */
-class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr['background'])) return $attr;
+class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['background'])) {
+            return $attr;
+        }
 
         $background = $this->confiscateAttr($attr, 'background');
         // some validation should happen here
 
         $this->prependCSS($attr, "background-image:url($background);");
-
         return $attr;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/BdoDir.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BdoDir.php
similarity index 55%
rename from library/HTMLPurifier/AttrTransform/BdoDir.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BdoDir.php
index 4d1a05665e..d66c04a5b8 100644
--- a/library/HTMLPurifier/AttrTransform/BdoDir.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BdoDir.php
@@ -8,12 +8,20 @@
 class HTMLPurifier_AttrTransform_BdoDir extends HTMLPurifier_AttrTransform
 {
 
-    public function transform($attr, $config, $context) {
-        if (isset($attr['dir'])) return $attr;
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (isset($attr['dir'])) {
+            return $attr;
+        }
         $attr['dir'] = $config->get('Attr.DefaultTextDir');
         return $attr;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/BgColor.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BgColor.php
similarity index 55%
rename from library/HTMLPurifier/AttrTransform/BgColor.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BgColor.php
index ad3916bb96..0f51fd2cec 100644
--- a/library/HTMLPurifier/AttrTransform/BgColor.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BgColor.php
@@ -3,21 +3,26 @@
 /**
  * Pre-transform that changes deprecated bgcolor attribute to CSS.
  */
-class HTMLPurifier_AttrTransform_BgColor extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr['bgcolor'])) return $attr;
+class HTMLPurifier_AttrTransform_BgColor extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['bgcolor'])) {
+            return $attr;
+        }
 
         $bgcolor = $this->confiscateAttr($attr, 'bgcolor');
         // some validation should happen here
 
         $this->prependCSS($attr, "background-color:$bgcolor;");
-
         return $attr;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BoolToCSS.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BoolToCSS.php
new file mode 100644
index 0000000000..f25cd01955
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/BoolToCSS.php
@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * Pre-transform that changes converts a boolean attribute to fixed CSS
+ */
+class HTMLPurifier_AttrTransform_BoolToCSS extends HTMLPurifier_AttrTransform
+{
+    /**
+     * Name of boolean attribute that is trigger.
+     * @type string
+     */
+    protected $attr;
+
+    /**
+     * CSS declarations to add to style, needs trailing semicolon.
+     * @type string
+     */
+    protected $css;
+
+    /**
+     * @param string $attr attribute name to convert from
+     * @param string $css CSS declarations to add to style (needs semicolon)
+     */
+    public function __construct($attr, $css)
+    {
+        $this->attr = $attr;
+        $this->css = $css;
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr[$this->attr])) {
+            return $attr;
+        }
+        unset($attr[$this->attr]);
+        $this->prependCSS($attr, $this->css);
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Border.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Border.php
similarity index 55%
rename from library/HTMLPurifier/AttrTransform/Border.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Border.php
index 476b0b079b..057dc017fa 100644
--- a/library/HTMLPurifier/AttrTransform/Border.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Border.php
@@ -3,16 +3,24 @@
 /**
  * Pre-transform that changes deprecated border attribute to CSS.
  */
-class HTMLPurifier_AttrTransform_Border extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['border'])) return $attr;
+class HTMLPurifier_AttrTransform_Border extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['border'])) {
+            return $attr;
+        }
         $border_width = $this->confiscateAttr($attr, 'border');
         // some validation should happen here
         $this->prependCSS($attr, "border:{$border_width}px solid;");
         return $attr;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php
new file mode 100644
index 0000000000..7ccd0e3fb7
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php
@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * Generic pre-transform that converts an attribute with a fixed number of
+ * values (enumerated) to CSS.
+ */
+class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform
+{
+    /**
+     * Name of attribute to transform from.
+     * @type string
+     */
+    protected $attr;
+
+    /**
+     * Lookup array of attribute values to CSS.
+     * @type array
+     */
+    protected $enumToCSS = array();
+
+    /**
+     * Case sensitivity of the matching.
+     * @type bool
+     * @warning Currently can only be guaranteed to work with ASCII
+     *          values.
+     */
+    protected $caseSensitive = false;
+
+    /**
+     * @param string $attr Attribute name to transform from
+     * @param array $enum_to_css Lookup array of attribute values to CSS
+     * @param bool $case_sensitive Case sensitivity indicator, default false
+     */
+    public function __construct($attr, $enum_to_css, $case_sensitive = false)
+    {
+        $this->attr = $attr;
+        $this->enumToCSS = $enum_to_css;
+        $this->caseSensitive = (bool)$case_sensitive;
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr[$this->attr])) {
+            return $attr;
+        }
+
+        $value = trim($attr[$this->attr]);
+        unset($attr[$this->attr]);
+
+        if (!$this->caseSensitive) {
+            $value = strtolower($value);
+        }
+
+        if (!isset($this->enumToCSS[$value])) {
+            return $attr;
+        }
+        $this->prependCSS($attr, $this->enumToCSS[$value]);
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/ImgRequired.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgRequired.php
similarity index 77%
rename from library/HTMLPurifier/AttrTransform/ImgRequired.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgRequired.php
index 7f0e4b7a59..7df6cb3e1b 100644
--- a/library/HTMLPurifier/AttrTransform/ImgRequired.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgRequired.php
@@ -11,11 +11,19 @@
 class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
 {
 
-    public function transform($attr, $config, $context) {
-
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
         $src = true;
         if (!isset($attr['src'])) {
-            if ($config->get('Core.RemoveInvalidImg')) return $attr;
+            if ($config->get('Core.RemoveInvalidImg')) {
+                return $attr;
+            }
             $attr['src'] = $config->get('Attr.DefaultInvalidImage');
             $src = false;
         }
@@ -25,7 +33,7 @@ class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
                 $alt = $config->get('Attr.DefaultImageAlt');
                 if ($alt === null) {
                     // truncate if the alt is too long
-                    $attr['alt'] = substr(basename($attr['src']),0,40);
+                    $attr['alt'] = substr(basename($attr['src']), 0, 40);
                 } else {
                     $attr['alt'] = $alt;
                 }
@@ -33,11 +41,8 @@ class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
                 $attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');
             }
         }
-
         return $attr;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/ImgSpace.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgSpace.php
similarity index 60%
rename from library/HTMLPurifier/AttrTransform/ImgSpace.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgSpace.php
index fd84c10c36..350b3358fc 100644
--- a/library/HTMLPurifier/AttrTransform/ImgSpace.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ImgSpace.php
@@ -3,42 +3,59 @@
 /**
  * Pre-transform that changes deprecated hspace and vspace attributes to CSS
  */
-class HTMLPurifier_AttrTransform_ImgSpace extends HTMLPurifier_AttrTransform {
-
+class HTMLPurifier_AttrTransform_ImgSpace extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @type string
+     */
     protected $attr;
+
+    /**
+     * @type array
+     */
     protected $css = array(
         'hspace' => array('left', 'right'),
         'vspace' => array('top', 'bottom')
     );
 
-    public function __construct($attr) {
+    /**
+     * @param string $attr
+     */
+    public function __construct($attr)
+    {
         $this->attr = $attr;
         if (!isset($this->css[$attr])) {
             trigger_error(htmlspecialchars($attr) . ' is not valid space attribute');
         }
     }
 
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr[$this->attr])) return $attr;
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr[$this->attr])) {
+            return $attr;
+        }
 
         $width = $this->confiscateAttr($attr, $this->attr);
         // some validation could happen here
 
-        if (!isset($this->css[$this->attr])) return $attr;
+        if (!isset($this->css[$this->attr])) {
+            return $attr;
+        }
 
         $style = '';
         foreach ($this->css[$this->attr] as $suffix) {
             $property = "margin-$suffix";
             $style .= "$property:{$width}px;";
         }
-
         $this->prependCSS($attr, $style);
-
         return $attr;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Input.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Input.php
similarity index 61%
rename from library/HTMLPurifier/AttrTransform/Input.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Input.php
index 16829552d1..3ab47ed8c9 100644
--- a/library/HTMLPurifier/AttrTransform/Input.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Input.php
@@ -4,17 +4,31 @@
  * Performs miscellaneous cross attribute validation and filtering for
  * input elements. This is meant to be a post-transform.
  */
-class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
-
+class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @type HTMLPurifier_AttrDef_HTML_Pixels
+     */
     protected $pixels;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->pixels = new HTMLPurifier_AttrDef_HTML_Pixels();
     }
 
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['type'])) $t = 'text';
-        else $t = strtolower($attr['type']);
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['type'])) {
+            $t = 'text';
+        } else {
+            $t = strtolower($attr['type']);
+        }
         if (isset($attr['checked']) && $t !== 'radio' && $t !== 'checkbox') {
             unset($attr['checked']);
         }
@@ -23,8 +37,11 @@ class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
         }
         if (isset($attr['size']) && $t !== 'text' && $t !== 'password') {
             $result = $this->pixels->validate($attr['size'], $config, $context);
-            if ($result === false) unset($attr['size']);
-            else $attr['size'] = $result;
+            if ($result === false) {
+                unset($attr['size']);
+            } else {
+                $attr['size'] = $result;
+            }
         }
         if (isset($attr['src']) && $t !== 'image') {
             unset($attr['src']);
@@ -34,7 +51,6 @@ class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
         }
         return $attr;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/Lang.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php
similarity index 68%
rename from library/HTMLPurifier/AttrTransform/Lang.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php
index 5869e7f820..5b0aff0e40 100644
--- a/library/HTMLPurifier/AttrTransform/Lang.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php
@@ -8,9 +8,15 @@
 class HTMLPurifier_AttrTransform_Lang extends HTMLPurifier_AttrTransform
 {
 
-    public function transform($attr, $config, $context) {
-
-        $lang     = isset($attr['lang']) ? $attr['lang'] : false;
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        $lang = isset($attr['lang']) ? $attr['lang'] : false;
         $xml_lang = isset($attr['xml:lang']) ? $attr['xml:lang'] : false;
 
         if ($lang !== false && $xml_lang === false) {
@@ -18,11 +24,8 @@ class HTMLPurifier_AttrTransform_Lang extends HTMLPurifier_AttrTransform
         } elseif ($xml_lang !== false) {
             $attr['lang'] = $xml_lang;
         }
-
         return $attr;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Length.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Length.php
new file mode 100644
index 0000000000..853f33549b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Length.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Class for handling width/height length attribute transformations to CSS
+ */
+class HTMLPurifier_AttrTransform_Length extends HTMLPurifier_AttrTransform
+{
+
+    /**
+     * @type string
+     */
+    protected $name;
+
+    /**
+     * @type string
+     */
+    protected $cssName;
+
+    public function __construct($name, $css_name = null)
+    {
+        $this->name = $name;
+        $this->cssName = $css_name ? $css_name : $name;
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr[$this->name])) {
+            return $attr;
+        }
+        $length = $this->confiscateAttr($attr, $this->name);
+        if (ctype_digit($length)) {
+            $length .= 'px';
+        }
+        $this->prependCSS($attr, $this->cssName . ":$length;");
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Name.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Name.php
new file mode 100644
index 0000000000..63cce6837a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Name.php
@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * Pre-transform that changes deprecated name attribute to ID if necessary
+ */
+class HTMLPurifier_AttrTransform_Name extends HTMLPurifier_AttrTransform
+{
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        // Abort early if we're using relaxed definition of name
+        if ($config->get('HTML.Attr.Name.UseCDATA')) {
+            return $attr;
+        }
+        if (!isset($attr['name'])) {
+            return $attr;
+        }
+        $id = $this->confiscateAttr($attr, 'name');
+        if (isset($attr['id'])) {
+            return $attr;
+        }
+        $attr['id'] = $id;
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/NameSync.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/NameSync.php
new file mode 100644
index 0000000000..36079b786f
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/NameSync.php
@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * Post-transform that performs validation to the name attribute; if
+ * it is present with an equivalent id attribute, it is passed through;
+ * otherwise validation is performed.
+ */
+class HTMLPurifier_AttrTransform_NameSync extends HTMLPurifier_AttrTransform
+{
+
+    public function __construct()
+    {
+        $this->idDef = new HTMLPurifier_AttrDef_HTML_ID();
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['name'])) {
+            return $attr;
+        }
+        $name = $attr['name'];
+        if (isset($attr['id']) && $attr['id'] === $name) {
+            return $attr;
+        }
+        $result = $this->idDef->validate($name, $config, $context);
+        if ($result === false) {
+            unset($attr['name']);
+        } else {
+            $attr['name'] = $result;
+        }
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Nofollow.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Nofollow.php
new file mode 100644
index 0000000000..1057ebee1b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Nofollow.php
@@ -0,0 +1,52 @@
+<?php
+
+// must be called POST validation
+
+/**
+ * Adds rel="nofollow" to all outbound links.  This transform is
+ * only attached if Attr.Nofollow is TRUE.
+ */
+class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @type HTMLPurifier_URIParser
+     */
+    private $parser;
+
+    public function __construct()
+    {
+        $this->parser = new HTMLPurifier_URIParser();
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['href'])) {
+            return $attr;
+        }
+
+        // XXX Kind of inefficient
+        $url = $this->parser->parse($attr['href']);
+        $scheme = $url->getSchemeObj($config, $context);
+
+        if ($scheme->browsable && !$url->isLocal($config, $context)) {
+            if (isset($attr['rel'])) {
+                $rels = explode(' ', $attr['rel']);
+                if (!in_array('nofollow', $rels)) {
+                    $rels[] = 'nofollow';
+                }
+                $attr['rel'] = implode(' ', $rels);
+            } else {
+                $attr['rel'] = 'nofollow';
+            }
+        }
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/SafeEmbed.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeEmbed.php
similarity index 56%
rename from library/HTMLPurifier/AttrTransform/SafeEmbed.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeEmbed.php
index 4da449981f..231c81a3f0 100644
--- a/library/HTMLPurifier/AttrTransform/SafeEmbed.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeEmbed.php
@@ -2,9 +2,19 @@
 
 class HTMLPurifier_AttrTransform_SafeEmbed extends HTMLPurifier_AttrTransform
 {
+    /**
+     * @type string
+     */
     public $name = "SafeEmbed";
 
-    public function transform($attr, $config, $context) {
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
         $attr['allowscriptaccess'] = 'never';
         $attr['allownetworking'] = 'internal';
         $attr['type'] = 'application/x-shockwave-flash';
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeObject.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeObject.php
new file mode 100644
index 0000000000..d1f3a4d2ed
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeObject.php
@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * Writes default type for all objects. Currently only supports flash.
+ */
+class HTMLPurifier_AttrTransform_SafeObject extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @type string
+     */
+    public $name = "SafeObject";
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['type'])) {
+            $attr['type'] = 'application/x-shockwave-flash';
+        }
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTransform/SafeParam.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeParam.php
similarity index 67%
rename from library/HTMLPurifier/AttrTransform/SafeParam.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeParam.php
index 3f992ec31b..1143b4b493 100644
--- a/library/HTMLPurifier/AttrTransform/SafeParam.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeParam.php
@@ -14,14 +14,30 @@
  */
 class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
 {
+    /**
+     * @type string
+     */
     public $name = "SafeParam";
+
+    /**
+     * @type HTMLPurifier_AttrDef_URI
+     */
     private $uri;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->uri = new HTMLPurifier_AttrDef_URI(true); // embedded
+        $this->wmode = new HTMLPurifier_AttrDef_Enum(array('window', 'opaque', 'transparent'));
     }
 
-    public function transform($attr, $config, $context) {
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
         // If we add support for other objects, we'll need to alter the
         // transforms.
         switch ($attr['name']) {
@@ -33,8 +49,15 @@ class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
             case 'allowNetworking':
                 $attr['value'] = 'internal';
                 break;
+            case 'allowFullScreen':
+                if ($config->get('HTML.FlashAllowFullScreen')) {
+                    $attr['value'] = ($attr['value'] == 'true') ? 'true' : 'false';
+                } else {
+                    $attr['value'] = 'false';
+                }
+                break;
             case 'wmode':
-                $attr['value'] = 'window';
+                $attr['value'] = $this->wmode->validate($attr['value'], $config, $context);
                 break;
             case 'movie':
             case 'src':
diff --git a/library/HTMLPurifier/AttrTransform/ScriptRequired.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ScriptRequired.php
similarity index 59%
rename from library/HTMLPurifier/AttrTransform/ScriptRequired.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ScriptRequired.php
index 4499050a22..b7057bbf8e 100644
--- a/library/HTMLPurifier/AttrTransform/ScriptRequired.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/ScriptRequired.php
@@ -5,7 +5,14 @@
  */
 class HTMLPurifier_AttrTransform_ScriptRequired extends HTMLPurifier_AttrTransform
 {
-    public function transform($attr, $config, $context) {
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
         if (!isset($attr['type'])) {
             $attr['type'] = 'text/javascript';
         }
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetBlank.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetBlank.php
new file mode 100644
index 0000000000..dd63ea89cb
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetBlank.php
@@ -0,0 +1,45 @@
+<?php
+
+// must be called POST validation
+
+/**
+ * Adds target="blank" to all outbound links.  This transform is
+ * only attached if Attr.TargetBlank is TRUE.  This works regardless
+ * of whether or not Attr.AllowedFrameTargets
+ */
+class HTMLPurifier_AttrTransform_TargetBlank extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @type HTMLPurifier_URIParser
+     */
+    private $parser;
+
+    public function __construct()
+    {
+        $this->parser = new HTMLPurifier_URIParser();
+    }
+
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        if (!isset($attr['href'])) {
+            return $attr;
+        }
+
+        // XXX Kind of inefficient
+        $url = $this->parser->parse($attr['href']);
+        $scheme = $url->getSchemeObj($config, $context);
+
+        if ($scheme->browsable && !$url->isBenign($config, $context)) {
+            $attr['target'] = '_blank';
+        }
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Textarea.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Textarea.php
new file mode 100644
index 0000000000..6a9f33a0c8
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Textarea.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Sets height/width defaults for <textarea>
+ */
+class HTMLPurifier_AttrTransform_Textarea extends HTMLPurifier_AttrTransform
+{
+    /**
+     * @param array $attr
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function transform($attr, $config, $context)
+    {
+        // Calculated from Firefox
+        if (!isset($attr['cols'])) {
+            $attr['cols'] = '22';
+        }
+        if (!isset($attr['rows'])) {
+            $attr['rows'] = '3';
+        }
+        return $attr;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/AttrTypes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTypes.php
similarity index 64%
rename from library/HTMLPurifier/AttrTypes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTypes.php
index fc2ea4e588..3b70520b6a 100644
--- a/library/HTMLPurifier/AttrTypes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrTypes.php
@@ -6,7 +6,8 @@
 class HTMLPurifier_AttrTypes
 {
     /**
-     * Lookup array of attribute string identifiers to concrete implementations
+     * Lookup array of attribute string identifiers to concrete implementations.
+     * @type HTMLPurifier_AttrDef[]
      */
     protected $info = array();
 
@@ -14,7 +15,15 @@ class HTMLPurifier_AttrTypes
      * Constructs the info array, supplying default implementations for attribute
      * types.
      */
-    public function __construct() {
+    public function __construct()
+    {
+        // XXX This is kind of poor, since we don't actually /clone/
+        // instances; instead, we use the supplied make() attribute. So,
+        // the underlying class must know how to deal with arguments.
+        // With the old implementation of Enum, that ignored its
+        // arguments when handling a make dispatch, the IAlign
+        // definition wouldn't work.
+
         // pseudo-types, must be instantiated via shorthand
         $this->info['Enum']    = new HTMLPurifier_AttrDef_Enum();
         $this->info['Bool']    = new HTMLPurifier_AttrDef_HTML_Bool();
@@ -29,6 +38,9 @@ class HTMLPurifier_AttrTypes
         $this->info['URI']      = new HTMLPurifier_AttrDef_URI();
         $this->info['LanguageCode'] = new HTMLPurifier_AttrDef_Lang();
         $this->info['Color']    = new HTMLPurifier_AttrDef_HTML_Color();
+        $this->info['IAlign']   = self::makeEnum('top,middle,bottom,left,right');
+        $this->info['LAlign']   = self::makeEnum('top,bottom,left,right');
+        $this->info['FrameTarget'] = new HTMLPurifier_AttrDef_HTML_FrameTarget();
 
         // unimplemented aliases
         $this->info['ContentType'] = new HTMLPurifier_AttrDef_Text();
@@ -44,32 +56,39 @@ class HTMLPurifier_AttrTypes
         $this->info['Number']   = new HTMLPurifier_AttrDef_Integer(false, false, true);
     }
 
+    private static function makeEnum($in)
+    {
+        return new HTMLPurifier_AttrDef_Clone(new HTMLPurifier_AttrDef_Enum(explode(',', $in)));
+    }
+
     /**
      * Retrieves a type
-     * @param $type String type name
-     * @return Object AttrDef for type
+     * @param string $type String type name
+     * @return HTMLPurifier_AttrDef Object AttrDef for type
      */
-    public function get($type) {
-
+    public function get($type)
+    {
         // determine if there is any extra info tacked on
-        if (strpos($type, '#') !== false) list($type, $string) = explode('#', $type, 2);
-        else $string = '';
+        if (strpos($type, '#') !== false) {
+            list($type, $string) = explode('#', $type, 2);
+        } else {
+            $string = '';
+        }
 
         if (!isset($this->info[$type])) {
             trigger_error('Cannot retrieve undefined attribute type ' . $type, E_USER_ERROR);
             return;
         }
-
         return $this->info[$type]->make($string);
-
     }
 
     /**
      * Sets a new implementation for a type
-     * @param $type String type name
-     * @param $impl Object AttrDef for type
+     * @param string $type String type name
+     * @param HTMLPurifier_AttrDef $impl Object AttrDef for type
      */
-    public function set($type, $impl) {
+    public function set($type, $impl)
+    {
         $this->info[$type] = $impl;
     }
 }
diff --git a/library/HTMLPurifier/AttrValidator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrValidator.php
similarity index 74%
rename from library/HTMLPurifier/AttrValidator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/AttrValidator.php
index 829a0f8f22..f97dc93edd 100644
--- a/library/HTMLPurifier/AttrValidator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/AttrValidator.php
@@ -9,17 +9,14 @@ class HTMLPurifier_AttrValidator
 {
 
     /**
-     * Validates the attributes of a token, returning a modified token
+     * Validates the attributes of a token, mutating it as necessary.
      * that has valid tokens
-     * @param $token Reference to token to validate. We require a reference
-     *     because the operation this class performs on the token are
-     *     not atomic, so the context CurrentToken to be updated
-     *     throughout
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
+     * @param HTMLPurifier_Token $token Token to validate.
+     * @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config
+     * @param HTMLPurifier_Context $context Instance of HTMLPurifier_Context
      */
-    public function validateToken(&$token, &$config, $context) {
-
+    public function validateToken($token, $config, $context)
+    {
         $definition = $config->getHTMLDefinition();
         $e =& $context->get('ErrorCollector', true);
 
@@ -32,12 +29,15 @@ class HTMLPurifier_AttrValidator
 
         // initialize CurrentToken if necessary
         $current_token =& $context->get('CurrentToken', true);
-        if (!$current_token) $context->register('CurrentToken', $token);
+        if (!$current_token) {
+            $context->register('CurrentToken', $token);
+        }
 
-        if (
-            !$token instanceof HTMLPurifier_Token_Start &&
+        if (!$token instanceof HTMLPurifier_Token_Start &&
             !$token instanceof HTMLPurifier_Token_Empty
-        ) return $token;
+        ) {
+            return;
+        }
 
         // create alias to global definition array, see also $defs
         // DEFINITION CALL
@@ -51,7 +51,9 @@ class HTMLPurifier_AttrValidator
         foreach ($definition->info_attr_transform_pre as $transform) {
             $attr = $transform->transform($o = $attr, $config, $context);
             if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                if ($attr != $o) {
+                    $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                }
             }
         }
 
@@ -60,7 +62,9 @@ class HTMLPurifier_AttrValidator
         foreach ($definition->info[$token->name]->attr_transform_pre as $transform) {
             $attr = $transform->transform($o = $attr, $config, $context);
             if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                if ($attr != $o) {
+                    $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                }
             }
         }
 
@@ -77,7 +81,7 @@ class HTMLPurifier_AttrValidator
         foreach ($attr as $attr_key => $value) {
 
             // call the definition
-            if ( isset($defs[$attr_key]) ) {
+            if (isset($defs[$attr_key])) {
                 // there is a local definition defined
                 if ($defs[$attr_key] === false) {
                     // We've explicitly been told not to allow this element.
@@ -89,15 +93,19 @@ class HTMLPurifier_AttrValidator
                 } else {
                     // validate according to the element's definition
                     $result = $defs[$attr_key]->validate(
-                                    $value, $config, $context
-                               );
+                        $value,
+                        $config,
+                        $context
+                    );
                 }
-            } elseif ( isset($d_defs[$attr_key]) ) {
+            } elseif (isset($d_defs[$attr_key])) {
                 // there is a global definition defined, validate according
                 // to the global definition
                 $result = $d_defs[$attr_key]->validate(
-                                $value, $config, $context
-                           );
+                    $value,
+                    $config,
+                    $context
+                );
             } else {
                 // system never heard of the attribute? DELETE!
                 $result = false;
@@ -107,7 +115,9 @@ class HTMLPurifier_AttrValidator
             if ($result === false || $result === null) {
                 // this is a generic error message that should replaced
                 // with more specific ones when possible
-                if ($e) $e->send(E_ERROR, 'AttrValidator: Attribute removed');
+                if ($e) {
+                    $e->send(E_ERROR, 'AttrValidator: Attribute removed');
+                }
 
                 // remove the attribute
                 unset($attr[$attr_key]);
@@ -137,7 +147,9 @@ class HTMLPurifier_AttrValidator
         foreach ($definition->info_attr_transform_post as $transform) {
             $attr = $transform->transform($o = $attr, $config, $context);
             if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                if ($attr != $o) {
+                    $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                }
             }
         }
 
@@ -145,14 +157,18 @@ class HTMLPurifier_AttrValidator
         foreach ($definition->info[$token->name]->attr_transform_post as $transform) {
             $attr = $transform->transform($o = $attr, $config, $context);
             if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                if ($attr != $o) {
+                    $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+                }
             }
         }
 
         $token->attr = $attr;
 
         // destroy CurrentToken if we made it ourselves
-        if (!$current_token) $context->destroy('CurrentToken');
+        if (!$current_token) {
+            $context->destroy('CurrentToken');
+        }
 
     }
 
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Bootstrap.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Bootstrap.php
new file mode 100644
index 0000000000..707122bb29
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Bootstrap.php
@@ -0,0 +1,124 @@
+<?php
+
+// constants are slow, so we use as few as possible
+if (!defined('HTMLPURIFIER_PREFIX')) {
+    define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));
+}
+
+// accomodations for versions earlier than 5.0.2
+// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
+if (!defined('PHP_EOL')) {
+    switch (strtoupper(substr(PHP_OS, 0, 3))) {
+        case 'WIN':
+            define('PHP_EOL', "\r\n");
+            break;
+        case 'DAR':
+            define('PHP_EOL', "\r");
+            break;
+        default:
+            define('PHP_EOL', "\n");
+    }
+}
+
+/**
+ * Bootstrap class that contains meta-functionality for HTML Purifier such as
+ * the autoload function.
+ *
+ * @note
+ *      This class may be used without any other files from HTML Purifier.
+ */
+class HTMLPurifier_Bootstrap
+{
+
+    /**
+     * Autoload function for HTML Purifier
+     * @param string $class Class to load
+     * @return bool
+     */
+    public static function autoload($class)
+    {
+        $file = HTMLPurifier_Bootstrap::getPath($class);
+        if (!$file) {
+            return false;
+        }
+        // Technically speaking, it should be ok and more efficient to
+        // just do 'require', but Antonio Parraga reports that with
+        // Zend extensions such as Zend debugger and APC, this invariant
+        // may be broken.  Since we have efficient alternatives, pay
+        // the cost here and avoid the bug.
+        require_once HTMLPURIFIER_PREFIX . '/' . $file;
+        return true;
+    }
+
+    /**
+     * Returns the path for a specific class.
+     * @param string $class Class path to get
+     * @return string
+     */
+    public static function getPath($class)
+    {
+        if (strncmp('HTMLPurifier', $class, 12) !== 0) {
+            return false;
+        }
+        // Custom implementations
+        if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
+            $code = str_replace('_', '-', substr($class, 22));
+            $file = 'HTMLPurifier/Language/classes/' . $code . '.php';
+        } else {
+            $file = str_replace('_', '/', $class) . '.php';
+        }
+        if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) {
+            return false;
+        }
+        return $file;
+    }
+
+    /**
+     * "Pre-registers" our autoloader on the SPL stack.
+     */
+    public static function registerAutoload()
+    {
+        $autoload = array('HTMLPurifier_Bootstrap', 'autoload');
+        if (($funcs = spl_autoload_functions()) === false) {
+            spl_autoload_register($autoload);
+        } elseif (function_exists('spl_autoload_unregister')) {
+            if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
+                // prepend flag exists, no need for shenanigans
+                spl_autoload_register($autoload, true, true);
+            } else {
+                $buggy  = version_compare(PHP_VERSION, '5.2.11', '<');
+                $compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
+                          version_compare(PHP_VERSION, '5.1.0', '>=');
+                foreach ($funcs as $func) {
+                    if ($buggy && is_array($func)) {
+                        // :TRICKY: There are some compatibility issues and some
+                        // places where we need to error out
+                        $reflector = new ReflectionMethod($func[0], $func[1]);
+                        if (!$reflector->isStatic()) {
+                            throw new Exception(
+                                'HTML Purifier autoloader registrar is not compatible
+                                with non-static object methods due to PHP Bug #44144;
+                                Please do not use HTMLPurifier.autoload.php (or any
+                                file that includes this file); instead, place the code:
+                                spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
+                                after your own autoloaders.'
+                            );
+                        }
+                        // Suprisingly, spl_autoload_register supports the
+                        // Class::staticMethod callback format, although call_user_func doesn't
+                        if ($compat) {
+                            $func = implode('::', $func);
+                        }
+                    }
+                    spl_autoload_unregister($func);
+                }
+                spl_autoload_register($autoload);
+                foreach ($funcs as $func) {
+                    spl_autoload_register($func);
+                }
+            }
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php
new file mode 100644
index 0000000000..07cc941758
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php
@@ -0,0 +1,474 @@
+<?php
+
+/**
+ * Defines allowed CSS attributes and what their values are.
+ * @see HTMLPurifier_HTMLDefinition
+ */
+class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
+{
+
+    public $type = 'CSS';
+
+    /**
+     * Assoc array of attribute name to definition object.
+     * @type HTMLPurifier_AttrDef[]
+     */
+    public $info = array();
+
+    /**
+     * Constructs the info array.  The meat of this class.
+     * @param HTMLPurifier_Config $config
+     */
+    protected function doSetup($config)
+    {
+        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
+            array('left', 'right', 'center', 'justify'),
+            false
+        );
+
+        $border_style =
+            $this->info['border-bottom-style'] =
+            $this->info['border-right-style'] =
+            $this->info['border-left-style'] =
+            $this->info['border-top-style'] = new HTMLPurifier_AttrDef_Enum(
+                array(
+                    'none',
+                    'hidden',
+                    'dotted',
+                    'dashed',
+                    'solid',
+                    'double',
+                    'groove',
+                    'ridge',
+                    'inset',
+                    'outset'
+                ),
+                false
+            );
+
+        $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
+
+        $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
+            array('none', 'left', 'right', 'both'),
+            false
+        );
+        $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
+            array('none', 'left', 'right'),
+            false
+        );
+        $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
+            array('normal', 'italic', 'oblique'),
+            false
+        );
+        $this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
+            array('normal', 'small-caps'),
+            false
+        );
+
+        $uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(array('none')),
+                new HTMLPurifier_AttrDef_CSS_URI()
+            )
+        );
+
+        $this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
+            array('inside', 'outside'),
+            false
+        );
+        $this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
+            array(
+                'disc',
+                'circle',
+                'square',
+                'decimal',
+                'lower-roman',
+                'upper-roman',
+                'lower-alpha',
+                'upper-alpha',
+                'none'
+            ),
+            false
+        );
+        $this->info['list-style-image'] = $uri_or_none;
+
+        $this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
+
+        $this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
+            array('capitalize', 'uppercase', 'lowercase', 'none'),
+            false
+        );
+        $this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
+
+        $this->info['background-image'] = $uri_or_none;
+        $this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
+            array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
+        );
+        $this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
+            array('scroll', 'fixed')
+        );
+        $this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
+
+        $border_color =
+            $this->info['border-top-color'] =
+            $this->info['border-bottom-color'] =
+            $this->info['border-left-color'] =
+            $this->info['border-right-color'] =
+            $this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(
+                array(
+                    new HTMLPurifier_AttrDef_Enum(array('transparent')),
+                    new HTMLPurifier_AttrDef_CSS_Color()
+                )
+            );
+
+        $this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
+
+        $this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
+
+        $border_width =
+            $this->info['border-top-width'] =
+            $this->info['border-bottom-width'] =
+            $this->info['border-left-width'] =
+            $this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(
+                array(
+                    new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
+                    new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
+                )
+            );
+
+        $this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
+
+        $this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(array('normal')),
+                new HTMLPurifier_AttrDef_CSS_Length()
+            )
+        );
+
+        $this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(array('normal')),
+                new HTMLPurifier_AttrDef_CSS_Length()
+            )
+        );
+
+        $this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(
+                    array(
+                        'xx-small',
+                        'x-small',
+                        'small',
+                        'medium',
+                        'large',
+                        'x-large',
+                        'xx-large',
+                        'larger',
+                        'smaller'
+                    )
+                ),
+                new HTMLPurifier_AttrDef_CSS_Percentage(),
+                new HTMLPurifier_AttrDef_CSS_Length()
+            )
+        );
+
+        $this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(array('normal')),
+                new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
+                new HTMLPurifier_AttrDef_CSS_Length('0'),
+                new HTMLPurifier_AttrDef_CSS_Percentage(true)
+            )
+        );
+
+        $margin =
+            $this->info['margin-top'] =
+            $this->info['margin-bottom'] =
+            $this->info['margin-left'] =
+            $this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
+                array(
+                    new HTMLPurifier_AttrDef_CSS_Length(),
+                    new HTMLPurifier_AttrDef_CSS_Percentage(),
+                    new HTMLPurifier_AttrDef_Enum(array('auto'))
+                )
+            );
+
+        $this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
+
+        // non-negative
+        $padding =
+            $this->info['padding-top'] =
+            $this->info['padding-bottom'] =
+            $this->info['padding-left'] =
+            $this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
+                array(
+                    new HTMLPurifier_AttrDef_CSS_Length('0'),
+                    new HTMLPurifier_AttrDef_CSS_Percentage(true)
+                )
+            );
+
+        $this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
+
+        $this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_CSS_Length(),
+                new HTMLPurifier_AttrDef_CSS_Percentage()
+            )
+        );
+
+        $trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_CSS_Length('0'),
+                new HTMLPurifier_AttrDef_CSS_Percentage(true),
+                new HTMLPurifier_AttrDef_Enum(array('auto'))
+            )
+        );
+        $max = $config->get('CSS.MaxImgLength');
+
+        $this->info['width'] =
+        $this->info['height'] =
+            $max === null ?
+                $trusted_wh :
+                new HTMLPurifier_AttrDef_Switch(
+                    'img',
+                    // For img tags:
+                    new HTMLPurifier_AttrDef_CSS_Composite(
+                        array(
+                            new HTMLPurifier_AttrDef_CSS_Length('0', $max),
+                            new HTMLPurifier_AttrDef_Enum(array('auto'))
+                        )
+                    ),
+                    // For everyone else:
+                    $trusted_wh
+                );
+
+        $this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
+
+        $this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
+
+        // this could use specialized code
+        $this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
+            array(
+                'normal',
+                'bold',
+                'bolder',
+                'lighter',
+                '100',
+                '200',
+                '300',
+                '400',
+                '500',
+                '600',
+                '700',
+                '800',
+                '900'
+            ),
+            false
+        );
+
+        // MUST be called after other font properties, as it references
+        // a CSSDefinition object
+        $this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
+
+        // same here
+        $this->info['border'] =
+        $this->info['border-bottom'] =
+        $this->info['border-top'] =
+        $this->info['border-left'] =
+        $this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
+
+        $this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(
+            array('collapse', 'separate')
+        );
+
+        $this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(
+            array('top', 'bottom')
+        );
+
+        $this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(
+            array('auto', 'fixed')
+        );
+
+        $this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(
+                    array(
+                        'baseline',
+                        'sub',
+                        'super',
+                        'top',
+                        'text-top',
+                        'middle',
+                        'bottom',
+                        'text-bottom'
+                    )
+                ),
+                new HTMLPurifier_AttrDef_CSS_Length(),
+                new HTMLPurifier_AttrDef_CSS_Percentage()
+            )
+        );
+
+        $this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
+
+        // These CSS properties don't work on many browsers, but we live
+        // in THE FUTURE!
+        $this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(
+            array('nowrap', 'normal', 'pre', 'pre-wrap', 'pre-line')
+        );
+
+        if ($config->get('CSS.Proprietary')) {
+            $this->doSetupProprietary($config);
+        }
+
+        if ($config->get('CSS.AllowTricky')) {
+            $this->doSetupTricky($config);
+        }
+
+        if ($config->get('CSS.Trusted')) {
+            $this->doSetupTrusted($config);
+        }
+
+        $allow_important = $config->get('CSS.AllowImportant');
+        // wrap all attr-defs with decorator that handles !important
+        foreach ($this->info as $k => $v) {
+            $this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
+        }
+
+        $this->setupConfigStuff($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    protected function doSetupProprietary($config)
+    {
+        // Internet Explorer only scrollbar colors
+        $this->info['scrollbar-arrow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-base-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-darkshadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-face-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-highlight-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-shadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
+
+        // vendor specific prefixes of opacity
+        $this->info['-moz-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+        $this->info['-khtml-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+
+        // only opacity, for now
+        $this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
+
+        // more CSS3
+        $this->info['page-break-after'] =
+        $this->info['page-break-before'] = new HTMLPurifier_AttrDef_Enum(
+            array(
+                'auto',
+                'always',
+                'avoid',
+                'left',
+                'right'
+            )
+        );
+        $this->info['page-break-inside'] = new HTMLPurifier_AttrDef_Enum(array('auto', 'avoid'));
+
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    protected function doSetupTricky($config)
+    {
+        $this->info['display'] = new HTMLPurifier_AttrDef_Enum(
+            array(
+                'inline',
+                'block',
+                'list-item',
+                'run-in',
+                'compact',
+                'marker',
+                'table',
+                'inline-block',
+                'inline-table',
+                'table-row-group',
+                'table-header-group',
+                'table-footer-group',
+                'table-row',
+                'table-column-group',
+                'table-column',
+                'table-cell',
+                'table-caption',
+                'none'
+            )
+        );
+        $this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(
+            array('visible', 'hidden', 'collapse')
+        );
+        $this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
+        $this->info['opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    protected function doSetupTrusted($config)
+    {
+        $this->info['position'] = new HTMLPurifier_AttrDef_Enum(
+            array('static', 'relative', 'absolute', 'fixed')
+        );
+        $this->info['top'] =
+        $this->info['left'] =
+        $this->info['right'] =
+        $this->info['bottom'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_CSS_Length(),
+                new HTMLPurifier_AttrDef_CSS_Percentage(),
+                new HTMLPurifier_AttrDef_Enum(array('auto')),
+            )
+        );
+        $this->info['z-index'] = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Integer(),
+                new HTMLPurifier_AttrDef_Enum(array('auto')),
+            )
+        );
+    }
+
+    /**
+     * Performs extra config-based processing. Based off of
+     * HTMLPurifier_HTMLDefinition.
+     * @param HTMLPurifier_Config $config
+     * @todo Refactor duplicate elements into common class (probably using
+     *       composition, not inheritance).
+     */
+    protected function setupConfigStuff($config)
+    {
+        // setup allowed elements
+        $support = "(for information on implementing this, see the " .
+            "support forums) ";
+        $allowed_properties = $config->get('CSS.AllowedProperties');
+        if ($allowed_properties !== null) {
+            foreach ($this->info as $name => $d) {
+                if (!isset($allowed_properties[$name])) {
+                    unset($this->info[$name]);
+                }
+                unset($allowed_properties[$name]);
+            }
+            // emit errors
+            foreach ($allowed_properties as $name => $d) {
+                // :TODO: Is this htmlspecialchars() call really necessary?
+                $name = htmlspecialchars($name);
+                trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
+            }
+        }
+
+        $forbidden_properties = $config->get('CSS.ForbiddenProperties');
+        if ($forbidden_properties !== null) {
+            foreach ($this->info as $name => $d) {
+                if (isset($forbidden_properties[$name])) {
+                    unset($this->info[$name]);
+                }
+            }
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef.php
similarity index 52%
rename from library/HTMLPurifier/ChildDef.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef.php
index c5d5216dab..8eb17b82e1 100644
--- a/library/HTMLPurifier/ChildDef.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef.php
@@ -1,48 +1,52 @@
 <?php
 
 /**
- * Defines allowed child nodes and validates tokens against it.
+ * Defines allowed child nodes and validates nodes against it.
  */
 abstract class HTMLPurifier_ChildDef
 {
     /**
      * Type of child definition, usually right-most part of class name lowercase.
      * Used occasionally in terms of context.
+     * @type string
      */
     public $type;
 
     /**
-     * Bool that indicates whether or not an empty array of children is okay
+     * Indicates whether or not an empty array of children is okay.
      *
      * This is necessary for redundant checking when changes affecting
      * a child node may cause a parent node to now be disallowed.
+     * @type bool
      */
     public $allow_empty;
 
     /**
-     * Lookup array of all elements that this definition could possibly allow
+     * Lookup array of all elements that this definition could possibly allow.
+     * @type array
      */
     public $elements = array();
 
     /**
      * Get lookup of tag names that should not close this element automatically.
      * All other elements will do so.
+     * @param HTMLPurifier_Config $config HTMLPurifier_Config object
+     * @return array
      */
-    public function getAllowedElements($config) {
+    public function getAllowedElements($config)
+    {
         return $this->elements;
     }
 
     /**
      * Validates nodes according to definition and returns modification.
      *
-     * @param $tokens_of_children Array of HTMLPurifier_Token
-     * @param $config HTMLPurifier_Config object
-     * @param $context HTMLPurifier_Context object
-     * @return bool true to leave nodes as is
-     * @return bool false to remove parent node
-     * @return array of replacement child tokens
+     * @param HTMLPurifier_Node[] $children Array of HTMLPurifier_Node
+     * @param HTMLPurifier_Config $config HTMLPurifier_Config object
+     * @param HTMLPurifier_Context $context HTMLPurifier_Context object
+     * @return bool|array true to leave nodes as is, false to remove parent node, array of replacement children
      */
-    abstract public function validateChildren($tokens_of_children, $config, $context);
+    abstract public function validateChildren($children, $config, $context);
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ChildDef/Chameleon.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Chameleon.php
similarity index 57%
rename from library/HTMLPurifier/ChildDef/Chameleon.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Chameleon.php
index 15c364ee33..7439be26b6 100644
--- a/library/HTMLPurifier/ChildDef/Chameleon.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Chameleon.php
@@ -14,33 +14,52 @@ class HTMLPurifier_ChildDef_Chameleon extends HTMLPurifier_ChildDef
 
     /**
      * Instance of the definition object to use when inline. Usually stricter.
+     * @type HTMLPurifier_ChildDef_Optional
      */
     public $inline;
 
     /**
      * Instance of the definition object to use when block.
+     * @type HTMLPurifier_ChildDef_Optional
      */
     public $block;
 
+    /**
+     * @type string
+     */
     public $type = 'chameleon';
 
     /**
-     * @param $inline List of elements to allow when inline.
-     * @param $block List of elements to allow when block.
+     * @param array $inline List of elements to allow when inline.
+     * @param array $block List of elements to allow when block.
      */
-    public function __construct($inline, $block) {
+    public function __construct($inline, $block)
+    {
         $this->inline = new HTMLPurifier_ChildDef_Optional($inline);
-        $this->block  = new HTMLPurifier_ChildDef_Optional($block);
+        $this->block = new HTMLPurifier_ChildDef_Optional($block);
         $this->elements = $this->block->elements;
     }
 
-    public function validateChildren($tokens_of_children, $config, $context) {
+    /**
+     * @param HTMLPurifier_Node[] $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function validateChildren($children, $config, $context)
+    {
         if ($context->get('IsInline') === false) {
             return $this->block->validateChildren(
-                $tokens_of_children, $config, $context);
+                $children,
+                $config,
+                $context
+            );
         } else {
             return $this->inline->validateChildren(
-                $tokens_of_children, $config, $context);
+                $children,
+                $config,
+                $context
+            );
         }
     }
 }
diff --git a/library/HTMLPurifier/ChildDef/Custom.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php
similarity index 71%
rename from library/HTMLPurifier/ChildDef/Custom.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php
index b68047b4b5..128132e96d 100644
--- a/library/HTMLPurifier/ChildDef/Custom.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php
@@ -8,28 +8,42 @@
  */
 class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
 {
-    public $type = 'custom';
-    public $allow_empty = false;
     /**
-     * Allowed child pattern as defined by the DTD
+     * @type string
+     */
+    public $type = 'custom';
+
+    /**
+     * @type bool
+     */
+    public $allow_empty = false;
+
+    /**
+     * Allowed child pattern as defined by the DTD.
+     * @type string
      */
     public $dtd_regex;
+
     /**
-     * PCRE regex derived from $dtd_regex
-     * @private
+     * PCRE regex derived from $dtd_regex.
+     * @type string
      */
     private $_pcre_regex;
+
     /**
      * @param $dtd_regex Allowed child pattern from the DTD
      */
-    public function __construct($dtd_regex) {
+    public function __construct($dtd_regex)
+    {
         $this->dtd_regex = $dtd_regex;
         $this->_compileRegex();
     }
+
     /**
      * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
      */
-    protected function _compileRegex() {
+    protected function _compileRegex()
+    {
         $raw = str_replace(' ', '', $this->dtd_regex);
         if ($raw{0} != '(') {
             $raw = "($raw)";
@@ -57,33 +71,31 @@ class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
 
         $this->_pcre_regex = $reg;
     }
-    public function validateChildren($tokens_of_children, $config, $context) {
+
+    /**
+     * @param HTMLPurifier_Node[] $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function validateChildren($children, $config, $context)
+    {
         $list_of_children = '';
         $nesting = 0; // depth into the nest
-        foreach ($tokens_of_children as $token) {
-            if (!empty($token->is_whitespace)) continue;
-
-            $is_child = ($nesting == 0); // direct
-
-            if ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            if ($is_child) {
-                $list_of_children .= $token->name . ',';
+        foreach ($children as $node) {
+            if (!empty($node->is_whitespace)) {
+                continue;
             }
+            $list_of_children .= $node->name . ',';
         }
         // add leading comma to deal with stray comma declarations
         $list_of_children = ',' . rtrim($list_of_children, ',');
         $okay =
             preg_match(
-                '/^,?'.$this->_pcre_regex.'$/',
+                '/^,?' . $this->_pcre_regex . '$/',
                 $list_of_children
             );
-
-        return (bool) $okay;
+        return (bool)$okay;
     }
 }
 
diff --git a/library/HTMLPurifier/ChildDef/Empty.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Empty.php
similarity index 58%
rename from library/HTMLPurifier/ChildDef/Empty.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Empty.php
index 13171f6651..a8a6cbdd2c 100644
--- a/library/HTMLPurifier/ChildDef/Empty.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Empty.php
@@ -9,10 +9,28 @@
  */
 class HTMLPurifier_ChildDef_Empty extends HTMLPurifier_ChildDef
 {
+    /**
+     * @type bool
+     */
     public $allow_empty = true;
+
+    /**
+     * @type string
+     */
     public $type = 'empty';
-    public function __construct() {}
-    public function validateChildren($tokens_of_children, $config, $context) {
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * @param HTMLPurifier_Node[] $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
         return array();
     }
 }
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/List.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/List.php
new file mode 100644
index 0000000000..891b9f6f5b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/List.php
@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * Definition for list containers ul and ol.
+ *
+ * What does this do?  The big thing is to handle ol/ul at the top
+ * level of list nodes, which should be handled specially by /folding/
+ * them into the previous list node.  We generally shouldn't ever
+ * see other disallowed elements, because the autoclose behavior
+ * in MakeWellFormed handles it.
+ */
+class HTMLPurifier_ChildDef_List extends HTMLPurifier_ChildDef
+{
+    /**
+     * @type string
+     */
+    public $type = 'list';
+    /**
+     * @type array
+     */
+    // lying a little bit, so that we can handle ul and ol ourselves
+    // XXX: This whole business with 'wrap' is all a bit unsatisfactory
+    public $elements = array('li' => true, 'ul' => true, 'ol' => true);
+
+    /**
+     * @param array $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
+        // Flag for subclasses
+        $this->whitespace = false;
+
+        // if there are no tokens, delete parent node
+        if (empty($children)) {
+            return false;
+        }
+
+        // the new set of children
+        $result = array();
+
+        // a little sanity check to make sure it's not ALL whitespace
+        $all_whitespace = true;
+
+        $current_li = false;
+
+        foreach ($children as $node) {
+            if (!empty($node->is_whitespace)) {
+                $result[] = $node;
+                continue;
+            }
+            $all_whitespace = false; // phew, we're not talking about whitespace
+
+            if ($node->name === 'li') {
+                // good
+                $current_li = $node;
+                $result[] = $node;
+            } else {
+                // we want to tuck this into the previous li
+                // Invariant: we expect the node to be ol/ul
+                // ToDo: Make this more robust in the case of not ol/ul
+                // by distinguishing between existing li and li created
+                // to handle non-list elements; non-list elements should
+                // not be appended to an existing li; only li created
+                // for non-list. This distinction is not currently made.
+                if ($current_li === false) {
+                    $current_li = new HTMLPurifier_Node_Element('li');
+                    $result[] = $current_li;
+                }
+                $current_li->children[] = $node;
+                $current_li->empty = false; // XXX fascinating! Check for this error elsewhere ToDo
+            }
+        }
+        if (empty($result)) {
+            return false;
+        }
+        if ($all_whitespace) {
+            return false;
+        }
+        return $result;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Optional.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Optional.php
new file mode 100644
index 0000000000..b9468063b1
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Optional.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Definition that allows a set of elements, and allows no children.
+ * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
+ *       really, one shouldn't inherit from the other.  Only altered behavior
+ *       is to overload a returned false with an array.  Thus, it will never
+ *       return false.
+ */
+class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
+{
+    /**
+     * @type bool
+     */
+    public $allow_empty = true;
+
+    /**
+     * @type string
+     */
+    public $type = 'optional';
+
+    /**
+     * @param array $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
+        $result = parent::validateChildren($children, $config, $context);
+        // we assume that $children is not modified
+        if ($result === false) {
+            if (empty($children)) {
+                return true;
+            } elseif ($this->whitespace) {
+                return $children;
+            } else {
+                return array();
+            }
+        }
+        return $result;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php
new file mode 100644
index 0000000000..0d1c8f5f39
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php
@@ -0,0 +1,118 @@
+<?php
+
+/**
+ * Definition that allows a set of elements, but disallows empty children.
+ */
+class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
+{
+    /**
+     * Lookup table of allowed elements.
+     * @type array
+     */
+    public $elements = array();
+
+    /**
+     * Whether or not the last passed node was all whitespace.
+     * @type bool
+     */
+    protected $whitespace = false;
+
+    /**
+     * @param array|string $elements List of allowed element names (lowercase).
+     */
+    public function __construct($elements)
+    {
+        if (is_string($elements)) {
+            $elements = str_replace(' ', '', $elements);
+            $elements = explode('|', $elements);
+        }
+        $keys = array_keys($elements);
+        if ($keys == array_keys($keys)) {
+            $elements = array_flip($elements);
+            foreach ($elements as $i => $x) {
+                $elements[$i] = true;
+                if (empty($i)) {
+                    unset($elements[$i]);
+                } // remove blank
+            }
+        }
+        $this->elements = $elements;
+    }
+
+    /**
+     * @type bool
+     */
+    public $allow_empty = false;
+
+    /**
+     * @type string
+     */
+    public $type = 'required';
+
+    /**
+     * @param array $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
+        // Flag for subclasses
+        $this->whitespace = false;
+
+        // if there are no tokens, delete parent node
+        if (empty($children)) {
+            return false;
+        }
+
+        // the new set of children
+        $result = array();
+
+        // whether or not parsed character data is allowed
+        // this controls whether or not we silently drop a tag
+        // or generate escaped HTML from it
+        $pcdata_allowed = isset($this->elements['#PCDATA']);
+
+        // a little sanity check to make sure it's not ALL whitespace
+        $all_whitespace = true;
+
+        $stack = array_reverse($children);
+        while (!empty($stack)) {
+            $node = array_pop($stack);
+            if (!empty($node->is_whitespace)) {
+                $result[] = $node;
+                continue;
+            }
+            $all_whitespace = false; // phew, we're not talking about whitespace
+
+            if (!isset($this->elements[$node->name])) {
+                // special case text
+                // XXX One of these ought to be redundant or something
+                if ($pcdata_allowed && $node instanceof HTMLPurifier_Node_Text) {
+                    $result[] = $node;
+                    continue;
+                }
+                // spill the child contents in
+                // ToDo: Make configurable
+                if ($node instanceof HTMLPurifier_Node_Element) {
+                    for ($i = count($node->children) - 1; $i >= 0; $i--) {
+                        $stack[] = $node->children[$i];
+                    }
+                    continue;
+                }
+                continue;
+            }
+            $result[] = $node;
+        }
+        if (empty($result)) {
+            return false;
+        }
+        if ($all_whitespace) {
+            $this->whitespace = true;
+            return false;
+        }
+        return $result;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/StrictBlockquote.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/StrictBlockquote.php
new file mode 100644
index 0000000000..3270a46e1b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/StrictBlockquote.php
@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * Takes the contents of blockquote when in strict and reformats for validation.
+ */
+class HTMLPurifier_ChildDef_StrictBlockquote extends HTMLPurifier_ChildDef_Required
+{
+    /**
+     * @type array
+     */
+    protected $real_elements;
+
+    /**
+     * @type array
+     */
+    protected $fake_elements;
+
+    /**
+     * @type bool
+     */
+    public $allow_empty = true;
+
+    /**
+     * @type string
+     */
+    public $type = 'strictblockquote';
+
+    /**
+     * @type bool
+     */
+    protected $init = false;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return array
+     * @note We don't want MakeWellFormed to auto-close inline elements since
+     *       they might be allowed.
+     */
+    public function getAllowedElements($config)
+    {
+        $this->init($config);
+        return $this->fake_elements;
+    }
+
+    /**
+     * @param array $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
+        $this->init($config);
+
+        // trick the parent class into thinking it allows more
+        $this->elements = $this->fake_elements;
+        $result = parent::validateChildren($children, $config, $context);
+        $this->elements = $this->real_elements;
+
+        if ($result === false) {
+            return array();
+        }
+        if ($result === true) {
+            $result = $children;
+        }
+
+        $def = $config->getHTMLDefinition();
+        $block_wrap_name = $def->info_block_wrapper;
+        $block_wrap = false;
+        $ret = array();
+
+        foreach ($result as $node) {
+            if ($block_wrap === false) {
+                if (($node instanceof HTMLPurifier_Node_Text && !$node->is_whitespace) ||
+                    ($node instanceof HTMLPurifier_Node_Element && !isset($this->elements[$node->name]))) {
+                        $block_wrap = new HTMLPurifier_Node_Element($def->info_block_wrapper);
+                        $ret[] = $block_wrap;
+                }
+            } else {
+                if ($node instanceof HTMLPurifier_Node_Element && isset($this->elements[$node->name])) {
+                    $block_wrap = false;
+
+                }
+            }
+            if ($block_wrap) {
+                $block_wrap->children[] = $node;
+            } else {
+                $ret[] = $node;
+            }
+        }
+        return $ret;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    private function init($config)
+    {
+        if (!$this->init) {
+            $def = $config->getHTMLDefinition();
+            // allow all inline elements
+            $this->real_elements = $this->elements;
+            $this->fake_elements = $def->info_content_sets['Flow'];
+            $this->fake_elements['#PCDATA'] = true;
+            $this->init = true;
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Table.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Table.php
new file mode 100644
index 0000000000..3e4a0f2182
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Table.php
@@ -0,0 +1,224 @@
+<?php
+
+/**
+ * Definition for tables.  The general idea is to extract out all of the
+ * essential bits, and then reconstruct it later.
+ *
+ * This is a bit confusing, because the DTDs and the W3C
+ * validators seem to disagree on the appropriate definition. The
+ * DTD claims:
+ *
+ *      (CAPTION?, (COL*|COLGROUP*), THEAD?, TFOOT?, TBODY+)
+ *
+ * But actually, the HTML4 spec then has this to say:
+ *
+ *      The TBODY start tag is always required except when the table
+ *      contains only one table body and no table head or foot sections.
+ *      The TBODY end tag may always be safely omitted.
+ *
+ * So the DTD is kind of wrong.  The validator is, unfortunately, kind
+ * of on crack.
+ *
+ * The definition changed again in XHTML1.1; and in my opinion, this
+ * formulation makes the most sense.
+ *
+ *      caption?, ( col* | colgroup* ), (( thead?, tfoot?, tbody+ ) | ( tr+ ))
+ *
+ * Essentially, we have two modes: thead/tfoot/tbody mode, and tr mode.
+ * If we encounter a thead, tfoot or tbody, we are placed in the former
+ * mode, and we *must* wrap any stray tr segments with a tbody. But if
+ * we don't run into any of them, just have tr tags is OK.
+ */
+class HTMLPurifier_ChildDef_Table extends HTMLPurifier_ChildDef
+{
+    /**
+     * @type bool
+     */
+    public $allow_empty = false;
+
+    /**
+     * @type string
+     */
+    public $type = 'table';
+
+    /**
+     * @type array
+     */
+    public $elements = array(
+        'tr' => true,
+        'tbody' => true,
+        'thead' => true,
+        'tfoot' => true,
+        'caption' => true,
+        'colgroup' => true,
+        'col' => true
+    );
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * @param array $children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($children, $config, $context)
+    {
+        if (empty($children)) {
+            return false;
+        }
+
+        // only one of these elements is allowed in a table
+        $caption = false;
+        $thead = false;
+        $tfoot = false;
+
+        // whitespace
+        $initial_ws = array();
+        $after_caption_ws = array();
+        $after_thead_ws = array();
+        $after_tfoot_ws = array();
+
+        // as many of these as you want
+        $cols = array();
+        $content = array();
+
+        $tbody_mode = false; // if true, then we need to wrap any stray
+                             // <tr>s with a <tbody>.
+
+        $ws_accum =& $initial_ws;
+
+        foreach ($children as $node) {
+            if ($node instanceof HTMLPurifier_Node_Comment) {
+                $ws_accum[] = $node;
+                continue;
+            }
+            switch ($node->name) {
+            case 'tbody':
+                $tbody_mode = true;
+                // fall through
+            case 'tr':
+                $content[] = $node;
+                $ws_accum =& $content;
+                break;
+            case 'caption':
+                // there can only be one caption!
+                if ($caption !== false)  break;
+                $caption = $node;
+                $ws_accum =& $after_caption_ws;
+                break;
+            case 'thead':
+                $tbody_mode = true;
+                // XXX This breaks rendering properties with
+                // Firefox, which never floats a <thead> to
+                // the top. Ever. (Our scheme will float the
+                // first <thead> to the top.)  So maybe
+                // <thead>s that are not first should be
+                // turned into <tbody>? Very tricky, indeed.
+                if ($thead === false) {
+                    $thead = $node;
+                    $ws_accum =& $after_thead_ws;
+                } else {
+                    // Oops, there's a second one! What
+                    // should we do?  Current behavior is to
+                    // transmutate the first and last entries into
+                    // tbody tags, and then put into content.
+                    // Maybe a better idea is to *attach
+                    // it* to the existing thead or tfoot?
+                    // We don't do this, because Firefox
+                    // doesn't float an extra tfoot to the
+                    // bottom like it does for the first one.
+                    $node->name = 'tbody';
+                    $content[] = $node;
+                    $ws_accum =& $content;
+                }
+                break;
+            case 'tfoot':
+                // see above for some aveats
+                $tbody_mode = true;
+                if ($tfoot === false) {
+                    $tfoot = $node;
+                    $ws_accum =& $after_tfoot_ws;
+                } else {
+                    $node->name = 'tbody';
+                    $content[] = $node;
+                    $ws_accum =& $content;
+                }
+                break;
+            case 'colgroup':
+            case 'col':
+                $cols[] = $node;
+                $ws_accum =& $cols;
+                break;
+            case '#PCDATA':
+                // How is whitespace handled? We treat is as sticky to
+                // the *end* of the previous element. So all of the
+                // nonsense we have worked on is to keep things
+                // together.
+                if (!empty($node->is_whitespace)) {
+                    $ws_accum[] = $node;
+                }
+                break;
+            }
+        }
+
+        if (empty($content)) {
+            return false;
+        }
+
+        $ret = $initial_ws;
+        if ($caption !== false) {
+            $ret[] = $caption;
+            $ret = array_merge($ret, $after_caption_ws);
+        }
+        if ($cols !== false) {
+            $ret = array_merge($ret, $cols);
+        }
+        if ($thead !== false) {
+            $ret[] = $thead;
+            $ret = array_merge($ret, $after_thead_ws);
+        }
+        if ($tfoot !== false) {
+            $ret[] = $tfoot;
+            $ret = array_merge($ret, $after_tfoot_ws);
+        }
+
+        if ($tbody_mode) {
+            // we have to shuffle tr into tbody
+            $current_tr_tbody = null;
+
+            foreach($content as $node) {
+                switch ($node->name) {
+                case 'tbody':
+                    $current_tr_tbody = null;
+                    $ret[] = $node;
+                    break;
+                case 'tr':
+                    if ($current_tr_tbody === null) {
+                        $current_tr_tbody = new HTMLPurifier_Node_Element('tbody');
+                        $ret[] = $current_tr_tbody;
+                    }
+                    $current_tr_tbody->children[] = $node;
+                    break;
+                case '#PCDATA':
+                    assert($node->is_whitespace);
+                    if ($current_tr_tbody === null) {
+                        $ret[] = $node;
+                    } else {
+                        $current_tr_tbody->children[] = $node;
+                    }
+                    break;
+                }
+            }
+        } else {
+            $ret = array_merge($ret, $content);
+        }
+
+        return $ret;
+
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Config.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Config.php
new file mode 100644
index 0000000000..2b2db0c264
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Config.php
@@ -0,0 +1,920 @@
+<?php
+
+/**
+ * Configuration object that triggers customizable behavior.
+ *
+ * @warning This class is strongly defined: that means that the class
+ *          will fail if an undefined directive is retrieved or set.
+ *
+ * @note Many classes that could (although many times don't) use the
+ *       configuration object make it a mandatory parameter.  This is
+ *       because a configuration object should always be forwarded,
+ *       otherwise, you run the risk of missing a parameter and then
+ *       being stumped when a configuration directive doesn't work.
+ *
+ * @todo Reconsider some of the public member variables
+ */
+class HTMLPurifier_Config
+{
+
+    /**
+     * HTML Purifier's version
+     * @type string
+     */
+    public $version = '4.7.0';
+
+    /**
+     * Whether or not to automatically finalize
+     * the object if a read operation is done.
+     * @type bool
+     */
+    public $autoFinalize = true;
+
+    // protected member variables
+
+    /**
+     * Namespace indexed array of serials for specific namespaces.
+     * @see getSerial() for more info.
+     * @type string[]
+     */
+    protected $serials = array();
+
+    /**
+     * Serial for entire configuration object.
+     * @type string
+     */
+    protected $serial;
+
+    /**
+     * Parser for variables.
+     * @type HTMLPurifier_VarParser_Flexible
+     */
+    protected $parser = null;
+
+    /**
+     * Reference HTMLPurifier_ConfigSchema for value checking.
+     * @type HTMLPurifier_ConfigSchema
+     * @note This is public for introspective purposes. Please don't
+     *       abuse!
+     */
+    public $def;
+
+    /**
+     * Indexed array of definitions.
+     * @type HTMLPurifier_Definition[]
+     */
+    protected $definitions;
+
+    /**
+     * Whether or not config is finalized.
+     * @type bool
+     */
+    protected $finalized = false;
+
+    /**
+     * Property list containing configuration directives.
+     * @type array
+     */
+    protected $plist;
+
+    /**
+     * Whether or not a set is taking place due to an alias lookup.
+     * @type bool
+     */
+    private $aliasMode;
+
+    /**
+     * Set to false if you do not want line and file numbers in errors.
+     * (useful when unit testing).  This will also compress some errors
+     * and exceptions.
+     * @type bool
+     */
+    public $chatty = true;
+
+    /**
+     * Current lock; only gets to this namespace are allowed.
+     * @type string
+     */
+    private $lock;
+
+    /**
+     * Constructor
+     * @param HTMLPurifier_ConfigSchema $definition ConfigSchema that defines
+     * what directives are allowed.
+     * @param HTMLPurifier_PropertyList $parent
+     */
+    public function __construct($definition, $parent = null)
+    {
+        $parent = $parent ? $parent : $definition->defaultPlist;
+        $this->plist = new HTMLPurifier_PropertyList($parent);
+        $this->def = $definition; // keep a copy around for checking
+        $this->parser = new HTMLPurifier_VarParser_Flexible();
+    }
+
+    /**
+     * Convenience constructor that creates a config object based on a mixed var
+     * @param mixed $config Variable that defines the state of the config
+     *                      object. Can be: a HTMLPurifier_Config() object,
+     *                      an array of directives based on loadArray(),
+     *                      or a string filename of an ini file.
+     * @param HTMLPurifier_ConfigSchema $schema Schema object
+     * @return HTMLPurifier_Config Configured object
+     */
+    public static function create($config, $schema = null)
+    {
+        if ($config instanceof HTMLPurifier_Config) {
+            // pass-through
+            return $config;
+        }
+        if (!$schema) {
+            $ret = HTMLPurifier_Config::createDefault();
+        } else {
+            $ret = new HTMLPurifier_Config($schema);
+        }
+        if (is_string($config)) {
+            $ret->loadIni($config);
+        } elseif (is_array($config)) $ret->loadArray($config);
+        return $ret;
+    }
+
+    /**
+     * Creates a new config object that inherits from a previous one.
+     * @param HTMLPurifier_Config $config Configuration object to inherit from.
+     * @return HTMLPurifier_Config object with $config as its parent.
+     */
+    public static function inherit(HTMLPurifier_Config $config)
+    {
+        return new HTMLPurifier_Config($config->def, $config->plist);
+    }
+
+    /**
+     * Convenience constructor that creates a default configuration object.
+     * @return HTMLPurifier_Config default object.
+     */
+    public static function createDefault()
+    {
+        $definition = HTMLPurifier_ConfigSchema::instance();
+        $config = new HTMLPurifier_Config($definition);
+        return $config;
+    }
+
+    /**
+     * Retrieves a value from the configuration.
+     *
+     * @param string $key String key
+     * @param mixed $a
+     *
+     * @return mixed
+     */
+    public function get($key, $a = null)
+    {
+        if ($a !== null) {
+            $this->triggerError(
+                "Using deprecated API: use \$config->get('$key.$a') instead",
+                E_USER_WARNING
+            );
+            $key = "$key.$a";
+        }
+        if (!$this->finalized) {
+            $this->autoFinalize();
+        }
+        if (!isset($this->def->info[$key])) {
+            // can't add % due to SimpleTest bug
+            $this->triggerError(
+                'Cannot retrieve value of undefined directive ' . htmlspecialchars($key),
+                E_USER_WARNING
+            );
+            return;
+        }
+        if (isset($this->def->info[$key]->isAlias)) {
+            $d = $this->def->info[$key];
+            $this->triggerError(
+                'Cannot get value from aliased directive, use real name ' . $d->key,
+                E_USER_ERROR
+            );
+            return;
+        }
+        if ($this->lock) {
+            list($ns) = explode('.', $key);
+            if ($ns !== $this->lock) {
+                $this->triggerError(
+                    'Cannot get value of namespace ' . $ns . ' when lock for ' .
+                    $this->lock .
+                    ' is active, this probably indicates a Definition setup method ' .
+                    'is accessing directives that are not within its namespace',
+                    E_USER_ERROR
+                );
+                return;
+            }
+        }
+        return $this->plist->get($key);
+    }
+
+    /**
+     * Retrieves an array of directives to values from a given namespace
+     *
+     * @param string $namespace String namespace
+     *
+     * @return array
+     */
+    public function getBatch($namespace)
+    {
+        if (!$this->finalized) {
+            $this->autoFinalize();
+        }
+        $full = $this->getAll();
+        if (!isset($full[$namespace])) {
+            $this->triggerError(
+                'Cannot retrieve undefined namespace ' .
+                htmlspecialchars($namespace),
+                E_USER_WARNING
+            );
+            return;
+        }
+        return $full[$namespace];
+    }
+
+    /**
+     * Returns a SHA-1 signature of a segment of the configuration object
+     * that uniquely identifies that particular configuration
+     *
+     * @param string $namespace Namespace to get serial for
+     *
+     * @return string
+     * @note Revision is handled specially and is removed from the batch
+     *       before processing!
+     */
+    public function getBatchSerial($namespace)
+    {
+        if (empty($this->serials[$namespace])) {
+            $batch = $this->getBatch($namespace);
+            unset($batch['DefinitionRev']);
+            $this->serials[$namespace] = sha1(serialize($batch));
+        }
+        return $this->serials[$namespace];
+    }
+
+    /**
+     * Returns a SHA-1 signature for the entire configuration object
+     * that uniquely identifies that particular configuration
+     *
+     * @return string
+     */
+    public function getSerial()
+    {
+        if (empty($this->serial)) {
+            $this->serial = sha1(serialize($this->getAll()));
+        }
+        return $this->serial;
+    }
+
+    /**
+     * Retrieves all directives, organized by namespace
+     *
+     * @warning This is a pretty inefficient function, avoid if you can
+     */
+    public function getAll()
+    {
+        if (!$this->finalized) {
+            $this->autoFinalize();
+        }
+        $ret = array();
+        foreach ($this->plist->squash() as $name => $value) {
+            list($ns, $key) = explode('.', $name, 2);
+            $ret[$ns][$key] = $value;
+        }
+        return $ret;
+    }
+
+    /**
+     * Sets a value to configuration.
+     *
+     * @param string $key key
+     * @param mixed $value value
+     * @param mixed $a
+     */
+    public function set($key, $value, $a = null)
+    {
+        if (strpos($key, '.') === false) {
+            $namespace = $key;
+            $directive = $value;
+            $value = $a;
+            $key = "$key.$directive";
+            $this->triggerError("Using deprecated API: use \$config->set('$key', ...) instead", E_USER_NOTICE);
+        } else {
+            list($namespace) = explode('.', $key);
+        }
+        if ($this->isFinalized('Cannot set directive after finalization')) {
+            return;
+        }
+        if (!isset($this->def->info[$key])) {
+            $this->triggerError(
+                'Cannot set undefined directive ' . htmlspecialchars($key) . ' to value',
+                E_USER_WARNING
+            );
+            return;
+        }
+        $def = $this->def->info[$key];
+
+        if (isset($def->isAlias)) {
+            if ($this->aliasMode) {
+                $this->triggerError(
+                    'Double-aliases not allowed, please fix '.
+                    'ConfigSchema bug with' . $key,
+                    E_USER_ERROR
+                );
+                return;
+            }
+            $this->aliasMode = true;
+            $this->set($def->key, $value);
+            $this->aliasMode = false;
+            $this->triggerError("$key is an alias, preferred directive name is {$def->key}", E_USER_NOTICE);
+            return;
+        }
+
+        // Raw type might be negative when using the fully optimized form
+        // of stdclass, which indicates allow_null == true
+        $rtype = is_int($def) ? $def : $def->type;
+        if ($rtype < 0) {
+            $type = -$rtype;
+            $allow_null = true;
+        } else {
+            $type = $rtype;
+            $allow_null = isset($def->allow_null);
+        }
+
+        try {
+            $value = $this->parser->parse($value, $type, $allow_null);
+        } catch (HTMLPurifier_VarParserException $e) {
+            $this->triggerError(
+                'Value for ' . $key . ' is of invalid type, should be ' .
+                HTMLPurifier_VarParser::getTypeName($type),
+                E_USER_WARNING
+            );
+            return;
+        }
+        if (is_string($value) && is_object($def)) {
+            // resolve value alias if defined
+            if (isset($def->aliases[$value])) {
+                $value = $def->aliases[$value];
+            }
+            // check to see if the value is allowed
+            if (isset($def->allowed) && !isset($def->allowed[$value])) {
+                $this->triggerError(
+                    'Value not supported, valid values are: ' .
+                    $this->_listify($def->allowed),
+                    E_USER_WARNING
+                );
+                return;
+            }
+        }
+        $this->plist->set($key, $value);
+
+        // reset definitions if the directives they depend on changed
+        // this is a very costly process, so it's discouraged
+        // with finalization
+        if ($namespace == 'HTML' || $namespace == 'CSS' || $namespace == 'URI') {
+            $this->definitions[$namespace] = null;
+        }
+
+        $this->serials[$namespace] = false;
+    }
+
+    /**
+     * Convenience function for error reporting
+     *
+     * @param array $lookup
+     *
+     * @return string
+     */
+    private function _listify($lookup)
+    {
+        $list = array();
+        foreach ($lookup as $name => $b) {
+            $list[] = $name;
+        }
+        return implode(', ', $list);
+    }
+
+    /**
+     * Retrieves object reference to the HTML definition.
+     *
+     * @param bool $raw Return a copy that has not been setup yet. Must be
+     *             called before it's been setup, otherwise won't work.
+     * @param bool $optimized If true, this method may return null, to
+     *             indicate that a cached version of the modified
+     *             definition object is available and no further edits
+     *             are necessary.  Consider using
+     *             maybeGetRawHTMLDefinition, which is more explicitly
+     *             named, instead.
+     *
+     * @return HTMLPurifier_HTMLDefinition
+     */
+    public function getHTMLDefinition($raw = false, $optimized = false)
+    {
+        return $this->getDefinition('HTML', $raw, $optimized);
+    }
+
+    /**
+     * Retrieves object reference to the CSS definition
+     *
+     * @param bool $raw Return a copy that has not been setup yet. Must be
+     *             called before it's been setup, otherwise won't work.
+     * @param bool $optimized If true, this method may return null, to
+     *             indicate that a cached version of the modified
+     *             definition object is available and no further edits
+     *             are necessary.  Consider using
+     *             maybeGetRawCSSDefinition, which is more explicitly
+     *             named, instead.
+     *
+     * @return HTMLPurifier_CSSDefinition
+     */
+    public function getCSSDefinition($raw = false, $optimized = false)
+    {
+        return $this->getDefinition('CSS', $raw, $optimized);
+    }
+
+    /**
+     * Retrieves object reference to the URI definition
+     *
+     * @param bool $raw Return a copy that has not been setup yet. Must be
+     *             called before it's been setup, otherwise won't work.
+     * @param bool $optimized If true, this method may return null, to
+     *             indicate that a cached version of the modified
+     *             definition object is available and no further edits
+     *             are necessary.  Consider using
+     *             maybeGetRawURIDefinition, which is more explicitly
+     *             named, instead.
+     *
+     * @return HTMLPurifier_URIDefinition
+     */
+    public function getURIDefinition($raw = false, $optimized = false)
+    {
+        return $this->getDefinition('URI', $raw, $optimized);
+    }
+
+    /**
+     * Retrieves a definition
+     *
+     * @param string $type Type of definition: HTML, CSS, etc
+     * @param bool $raw Whether or not definition should be returned raw
+     * @param bool $optimized Only has an effect when $raw is true.  Whether
+     *        or not to return null if the result is already present in
+     *        the cache.  This is off by default for backwards
+     *        compatibility reasons, but you need to do things this
+     *        way in order to ensure that caching is done properly.
+     *        Check out enduser-customize.html for more details.
+     *        We probably won't ever change this default, as much as the
+     *        maybe semantics is the "right thing to do."
+     *
+     * @throws HTMLPurifier_Exception
+     * @return HTMLPurifier_Definition
+     */
+    public function getDefinition($type, $raw = false, $optimized = false)
+    {
+        if ($optimized && !$raw) {
+            throw new HTMLPurifier_Exception("Cannot set optimized = true when raw = false");
+        }
+        if (!$this->finalized) {
+            $this->autoFinalize();
+        }
+        // temporarily suspend locks, so we can handle recursive definition calls
+        $lock = $this->lock;
+        $this->lock = null;
+        $factory = HTMLPurifier_DefinitionCacheFactory::instance();
+        $cache = $factory->create($type, $this);
+        $this->lock = $lock;
+        if (!$raw) {
+            // full definition
+            // ---------------
+            // check if definition is in memory
+            if (!empty($this->definitions[$type])) {
+                $def = $this->definitions[$type];
+                // check if the definition is setup
+                if ($def->setup) {
+                    return $def;
+                } else {
+                    $def->setup($this);
+                    if ($def->optimized) {
+                        $cache->add($def, $this);
+                    }
+                    return $def;
+                }
+            }
+            // check if definition is in cache
+            $def = $cache->get($this);
+            if ($def) {
+                // definition in cache, save to memory and return it
+                $this->definitions[$type] = $def;
+                return $def;
+            }
+            // initialize it
+            $def = $this->initDefinition($type);
+            // set it up
+            $this->lock = $type;
+            $def->setup($this);
+            $this->lock = null;
+            // save in cache
+            $cache->add($def, $this);
+            // return it
+            return $def;
+        } else {
+            // raw definition
+            // --------------
+            // check preconditions
+            $def = null;
+            if ($optimized) {
+                if (is_null($this->get($type . '.DefinitionID'))) {
+                    // fatally error out if definition ID not set
+                    throw new HTMLPurifier_Exception(
+                        "Cannot retrieve raw version without specifying %$type.DefinitionID"
+                    );
+                }
+            }
+            if (!empty($this->definitions[$type])) {
+                $def = $this->definitions[$type];
+                if ($def->setup && !$optimized) {
+                    $extra = $this->chatty ?
+                        " (try moving this code block earlier in your initialization)" :
+                        "";
+                    throw new HTMLPurifier_Exception(
+                        "Cannot retrieve raw definition after it has already been setup" .
+                        $extra
+                    );
+                }
+                if ($def->optimized === null) {
+                    $extra = $this->chatty ? " (try flushing your cache)" : "";
+                    throw new HTMLPurifier_Exception(
+                        "Optimization status of definition is unknown" . $extra
+                    );
+                }
+                if ($def->optimized !== $optimized) {
+                    $msg = $optimized ? "optimized" : "unoptimized";
+                    $extra = $this->chatty ?
+                        " (this backtrace is for the first inconsistent call, which was for a $msg raw definition)"
+                        : "";
+                    throw new HTMLPurifier_Exception(
+                        "Inconsistent use of optimized and unoptimized raw definition retrievals" . $extra
+                    );
+                }
+            }
+            // check if definition was in memory
+            if ($def) {
+                if ($def->setup) {
+                    // invariant: $optimized === true (checked above)
+                    return null;
+                } else {
+                    return $def;
+                }
+            }
+            // if optimized, check if definition was in cache
+            // (because we do the memory check first, this formulation
+            // is prone to cache slamming, but I think
+            // guaranteeing that either /all/ of the raw
+            // setup code or /none/ of it is run is more important.)
+            if ($optimized) {
+                // This code path only gets run once; once we put
+                // something in $definitions (which is guaranteed by the
+                // trailing code), we always short-circuit above.
+                $def = $cache->get($this);
+                if ($def) {
+                    // save the full definition for later, but don't
+                    // return it yet
+                    $this->definitions[$type] = $def;
+                    return null;
+                }
+            }
+            // check invariants for creation
+            if (!$optimized) {
+                if (!is_null($this->get($type . '.DefinitionID'))) {
+                    if ($this->chatty) {
+                        $this->triggerError(
+                            'Due to a documentation error in previous version of HTML Purifier, your ' .
+                            'definitions are not being cached.  If this is OK, you can remove the ' .
+                            '%$type.DefinitionRev and %$type.DefinitionID declaration.  Otherwise, ' .
+                            'modify your code to use maybeGetRawDefinition, and test if the returned ' .
+                            'value is null before making any edits (if it is null, that means that a ' .
+                            'cached version is available, and no raw operations are necessary).  See ' .
+                            '<a href="http://htmlpurifier.org/docs/enduser-customize.html#optimized">' .
+                            'Customize</a> for more details',
+                            E_USER_WARNING
+                        );
+                    } else {
+                        $this->triggerError(
+                            "Useless DefinitionID declaration",
+                            E_USER_WARNING
+                        );
+                    }
+                }
+            }
+            // initialize it
+            $def = $this->initDefinition($type);
+            $def->optimized = $optimized;
+            return $def;
+        }
+        throw new HTMLPurifier_Exception("The impossible happened!");
+    }
+
+    /**
+     * Initialise definition
+     *
+     * @param string $type What type of definition to create
+     *
+     * @return HTMLPurifier_CSSDefinition|HTMLPurifier_HTMLDefinition|HTMLPurifier_URIDefinition
+     * @throws HTMLPurifier_Exception
+     */
+    private function initDefinition($type)
+    {
+        // quick checks failed, let's create the object
+        if ($type == 'HTML') {
+            $def = new HTMLPurifier_HTMLDefinition();
+        } elseif ($type == 'CSS') {
+            $def = new HTMLPurifier_CSSDefinition();
+        } elseif ($type == 'URI') {
+            $def = new HTMLPurifier_URIDefinition();
+        } else {
+            throw new HTMLPurifier_Exception(
+                "Definition of $type type not supported"
+            );
+        }
+        $this->definitions[$type] = $def;
+        return $def;
+    }
+
+    public function maybeGetRawDefinition($name)
+    {
+        return $this->getDefinition($name, true, true);
+    }
+
+    /**
+     * @return HTMLPurifier_HTMLDefinition
+     */
+    public function maybeGetRawHTMLDefinition()
+    {
+        return $this->getDefinition('HTML', true, true);
+    }
+    
+    /**
+     * @return HTMLPurifier_CSSDefinition
+     */
+    public function maybeGetRawCSSDefinition()
+    {
+        return $this->getDefinition('CSS', true, true);
+    }
+    
+    /**
+     * @return HTMLPurifier_URIDefinition
+     */
+    public function maybeGetRawURIDefinition()
+    {
+        return $this->getDefinition('URI', true, true);
+    }
+
+    /**
+     * Loads configuration values from an array with the following structure:
+     * Namespace.Directive => Value
+     *
+     * @param array $config_array Configuration associative array
+     */
+    public function loadArray($config_array)
+    {
+        if ($this->isFinalized('Cannot load directives after finalization')) {
+            return;
+        }
+        foreach ($config_array as $key => $value) {
+            $key = str_replace('_', '.', $key);
+            if (strpos($key, '.') !== false) {
+                $this->set($key, $value);
+            } else {
+                $namespace = $key;
+                $namespace_values = $value;
+                foreach ($namespace_values as $directive => $value2) {
+                    $this->set($namespace .'.'. $directive, $value2);
+                }
+            }
+        }
+    }
+
+    /**
+     * Returns a list of array(namespace, directive) for all directives
+     * that are allowed in a web-form context as per an allowed
+     * namespaces/directives list.
+     *
+     * @param array $allowed List of allowed namespaces/directives
+     * @param HTMLPurifier_ConfigSchema $schema Schema to use, if not global copy
+     *
+     * @return array
+     */
+    public static function getAllowedDirectivesForForm($allowed, $schema = null)
+    {
+        if (!$schema) {
+            $schema = HTMLPurifier_ConfigSchema::instance();
+        }
+        if ($allowed !== true) {
+            if (is_string($allowed)) {
+                $allowed = array($allowed);
+            }
+            $allowed_ns = array();
+            $allowed_directives = array();
+            $blacklisted_directives = array();
+            foreach ($allowed as $ns_or_directive) {
+                if (strpos($ns_or_directive, '.') !== false) {
+                    // directive
+                    if ($ns_or_directive[0] == '-') {
+                        $blacklisted_directives[substr($ns_or_directive, 1)] = true;
+                    } else {
+                        $allowed_directives[$ns_or_directive] = true;
+                    }
+                } else {
+                    // namespace
+                    $allowed_ns[$ns_or_directive] = true;
+                }
+            }
+        }
+        $ret = array();
+        foreach ($schema->info as $key => $def) {
+            list($ns, $directive) = explode('.', $key, 2);
+            if ($allowed !== true) {
+                if (isset($blacklisted_directives["$ns.$directive"])) {
+                    continue;
+                }
+                if (!isset($allowed_directives["$ns.$directive"]) && !isset($allowed_ns[$ns])) {
+                    continue;
+                }
+            }
+            if (isset($def->isAlias)) {
+                continue;
+            }
+            if ($directive == 'DefinitionID' || $directive == 'DefinitionRev') {
+                continue;
+            }
+            $ret[] = array($ns, $directive);
+        }
+        return $ret;
+    }
+
+    /**
+     * Loads configuration values from $_GET/$_POST that were posted
+     * via ConfigForm
+     *
+     * @param array $array $_GET or $_POST array to import
+     * @param string|bool $index Index/name that the config variables are in
+     * @param array|bool $allowed List of allowed namespaces/directives
+     * @param bool $mq_fix Boolean whether or not to enable magic quotes fix
+     * @param HTMLPurifier_ConfigSchema $schema Schema to use, if not global copy
+     *
+     * @return mixed
+     */
+    public static function loadArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null)
+    {
+        $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $schema);
+        $config = HTMLPurifier_Config::create($ret, $schema);
+        return $config;
+    }
+
+    /**
+     * Merges in configuration values from $_GET/$_POST to object. NOT STATIC.
+     *
+     * @param array $array $_GET or $_POST array to import
+     * @param string|bool $index Index/name that the config variables are in
+     * @param array|bool $allowed List of allowed namespaces/directives
+     * @param bool $mq_fix Boolean whether or not to enable magic quotes fix
+     */
+    public function mergeArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true)
+    {
+         $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $this->def);
+         $this->loadArray($ret);
+    }
+
+    /**
+     * Prepares an array from a form into something usable for the more
+     * strict parts of HTMLPurifier_Config
+     *
+     * @param array $array $_GET or $_POST array to import
+     * @param string|bool $index Index/name that the config variables are in
+     * @param array|bool $allowed List of allowed namespaces/directives
+     * @param bool $mq_fix Boolean whether or not to enable magic quotes fix
+     * @param HTMLPurifier_ConfigSchema $schema Schema to use, if not global copy
+     *
+     * @return array
+     */
+    public static function prepareArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null)
+    {
+        if ($index !== false) {
+            $array = (isset($array[$index]) && is_array($array[$index])) ? $array[$index] : array();
+        }
+        $mq = $mq_fix && function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc();
+
+        $allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed, $schema);
+        $ret = array();
+        foreach ($allowed as $key) {
+            list($ns, $directive) = $key;
+            $skey = "$ns.$directive";
+            if (!empty($array["Null_$skey"])) {
+                $ret[$ns][$directive] = null;
+                continue;
+            }
+            if (!isset($array[$skey])) {
+                continue;
+            }
+            $value = $mq ? stripslashes($array[$skey]) : $array[$skey];
+            $ret[$ns][$directive] = $value;
+        }
+        return $ret;
+    }
+
+    /**
+     * Loads configuration values from an ini file
+     *
+     * @param string $filename Name of ini file
+     */
+    public function loadIni($filename)
+    {
+        if ($this->isFinalized('Cannot load directives after finalization')) {
+            return;
+        }
+        $array = parse_ini_file($filename, true);
+        $this->loadArray($array);
+    }
+
+    /**
+     * Checks whether or not the configuration object is finalized.
+     *
+     * @param string|bool $error String error message, or false for no error
+     *
+     * @return bool
+     */
+    public function isFinalized($error = false)
+    {
+        if ($this->finalized && $error) {
+            $this->triggerError($error, E_USER_ERROR);
+        }
+        return $this->finalized;
+    }
+
+    /**
+     * Finalizes configuration only if auto finalize is on and not
+     * already finalized
+     */
+    public function autoFinalize()
+    {
+        if ($this->autoFinalize) {
+            $this->finalize();
+        } else {
+            $this->plist->squash(true);
+        }
+    }
+
+    /**
+     * Finalizes a configuration object, prohibiting further change
+     */
+    public function finalize()
+    {
+        $this->finalized = true;
+        $this->parser = null;
+    }
+
+    /**
+     * Produces a nicely formatted error message by supplying the
+     * stack frame information OUTSIDE of HTMLPurifier_Config.
+     *
+     * @param string $msg An error message
+     * @param int $no An error number
+     */
+    protected function triggerError($msg, $no)
+    {
+        // determine previous stack frame
+        $extra = '';
+        if ($this->chatty) {
+            $trace = debug_backtrace();
+            // zip(tail(trace), trace) -- but PHP is not Haskell har har
+            for ($i = 0, $c = count($trace); $i < $c - 1; $i++) {
+                // XXX this is not correct on some versions of HTML Purifier
+                if ($trace[$i + 1]['class'] === 'HTMLPurifier_Config') {
+                    continue;
+                }
+                $frame = $trace[$i];
+                $extra = " invoked on line {$frame['line']} in file {$frame['file']}";
+                break;
+            }
+        }
+        trigger_error($msg . $extra, $no);
+    }
+
+    /**
+     * Returns a serialized form of the configuration object that can
+     * be reconstituted.
+     *
+     * @return string
+     */
+    public function serialize()
+    {
+        $this->getDefinition('HTML');
+        $this->getDefinition('CSS');
+        $this->getDefinition('URI');
+        return serialize($this);
+    }
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema.php
similarity index 69%
rename from library/HTMLPurifier/ConfigSchema.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema.php
index 67be5c71fd..bfbb0f92f5 100644
--- a/library/HTMLPurifier/ConfigSchema.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema.php
@@ -3,21 +3,24 @@
 /**
  * Configuration definition, defines directives and their defaults.
  */
-class HTMLPurifier_ConfigSchema {
-
+class HTMLPurifier_ConfigSchema
+{
     /**
      * Defaults of the directives and namespaces.
+     * @type array
      * @note This shares the exact same structure as HTMLPurifier_Config::$conf
      */
     public $defaults = array();
 
     /**
      * The default property list. Do not edit this property list.
+     * @type array
      */
     public $defaultPlist;
 
     /**
-     * Definition of the directives. The structure of this is:
+     * Definition of the directives.
+     * The structure of this is:
      *
      *  array(
      *      'Namespace' => array(
@@ -44,29 +47,43 @@ class HTMLPurifier_ConfigSchema {
      * This class is friendly with HTMLPurifier_Config. If you need introspection
      * about the schema, you're better of using the ConfigSchema_Interchange,
      * which uses more memory but has much richer information.
+     * @type array
      */
     public $info = array();
 
     /**
      * Application-wide singleton
+     * @type HTMLPurifier_ConfigSchema
      */
-    static protected $singleton;
+    protected static $singleton;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->defaultPlist = new HTMLPurifier_PropertyList();
     }
 
     /**
      * Unserializes the default ConfigSchema.
+     * @return HTMLPurifier_ConfigSchema
      */
-    public static function makeFromSerial() {
-        return unserialize(file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser'));
+    public static function makeFromSerial()
+    {
+        $contents = file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser');
+        $r = unserialize($contents);
+        if (!$r) {
+            $hash = sha1($contents);
+            trigger_error("Unserialization of configuration schema failed, sha1 of file was $hash", E_USER_ERROR);
+        }
+        return $r;
     }
 
     /**
      * Retrieves an instance of the application-wide configuration definition.
+     * @param HTMLPurifier_ConfigSchema $prototype
+     * @return HTMLPurifier_ConfigSchema
      */
-    public static function instance($prototype = null) {
+    public static function instance($prototype = null)
+    {
         if ($prototype !== null) {
             HTMLPurifier_ConfigSchema::$singleton = $prototype;
         } elseif (HTMLPurifier_ConfigSchema::$singleton === null || $prototype === true) {
@@ -80,17 +97,19 @@ class HTMLPurifier_ConfigSchema {
      * @warning Will fail of directive's namespace is defined.
      * @warning This method's signature is slightly different from the legacy
      *          define() static method! Beware!
-     * @param $namespace Namespace the directive is in
-     * @param $name Key of directive
-     * @param $default Default value of directive
-     * @param $type Allowed type of the directive. See
+     * @param string $key Name of directive
+     * @param mixed $default Default value of directive
+     * @param string $type Allowed type of the directive. See
      *      HTMLPurifier_DirectiveDef::$type for allowed values
-     * @param $allow_null Whether or not to allow null values
+     * @param bool $allow_null Whether or not to allow null values
      */
-    public function add($key, $default, $type, $allow_null) {
+    public function add($key, $default, $type, $allow_null)
+    {
         $obj = new stdclass();
         $obj->type = is_int($type) ? $type : HTMLPurifier_VarParser::$types[$type];
-        if ($allow_null) $obj->allow_null = true;
+        if ($allow_null) {
+            $obj->allow_null = true;
+        }
         $this->info[$key] = $obj;
         $this->defaults[$key] = $default;
         $this->defaultPlist->set($key, $default);
@@ -101,11 +120,11 @@ class HTMLPurifier_ConfigSchema {
      *
      * Directive value aliases are convenient for developers because it lets
      * them set a directive to several values and get the same result.
-     * @param $namespace Directive's namespace
-     * @param $name Name of Directive
-     * @param $aliases Hash of aliased values to the real alias
+     * @param string $key Name of Directive
+     * @param array $aliases Hash of aliased values to the real alias
      */
-    public function addValueAliases($key, $aliases) {
+    public function addValueAliases($key, $aliases)
+    {
         if (!isset($this->info[$key]->aliases)) {
             $this->info[$key]->aliases = array();
         }
@@ -118,22 +137,21 @@ class HTMLPurifier_ConfigSchema {
      * Defines a set of allowed values for a directive.
      * @warning This is slightly different from the corresponding static
      *          method definition.
-     * @param $namespace Namespace of directive
-     * @param $name Name of directive
-     * @param $allowed Lookup array of allowed values
+     * @param string $key Name of directive
+     * @param array $allowed Lookup array of allowed values
      */
-    public function addAllowedValues($key, $allowed) {
+    public function addAllowedValues($key, $allowed)
+    {
         $this->info[$key]->allowed = $allowed;
     }
 
     /**
      * Defines a directive alias for backwards compatibility
-     * @param $namespace
-     * @param $name Directive that will be aliased
-     * @param $new_namespace
-     * @param $new_name Directive that the alias will be to
+     * @param string $key Directive that will be aliased
+     * @param string $new_key Directive that the alias will be to
      */
-    public function addAlias($key, $new_key) {
+    public function addAlias($key, $new_key)
+    {
         $obj = new stdclass;
         $obj->key = $new_key;
         $obj->isAlias = true;
@@ -143,7 +161,8 @@ class HTMLPurifier_ConfigSchema {
     /**
      * Replaces any stdclass that only has the type property with type integer.
      */
-    public function postProcess() {
+    public function postProcess()
+    {
         foreach ($this->info as $key => $v) {
             if (count((array) $v) == 1) {
                 $this->info[$key] = $v->type;
@@ -152,7 +171,6 @@ class HTMLPurifier_ConfigSchema {
             }
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
similarity index 86%
rename from library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
index c05668a706..d5906cd46d 100644
--- a/library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
@@ -7,7 +7,12 @@
 class HTMLPurifier_ConfigSchema_Builder_ConfigSchema
 {
 
-    public function build($interchange) {
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     * @return HTMLPurifier_ConfigSchema
+     */
+    public function build($interchange)
+    {
         $schema = new HTMLPurifier_ConfigSchema();
         foreach ($interchange->directives as $d) {
             $schema->add(
@@ -38,7 +43,6 @@ class HTMLPurifier_ConfigSchema_Builder_ConfigSchema
         $schema->postProcess();
         return $schema;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Builder/Xml.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/Xml.php
similarity index 52%
rename from library/HTMLPurifier/ConfigSchema/Builder/Xml.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/Xml.php
index 244561a372..5fa56f7ddb 100644
--- a/library/HTMLPurifier/ConfigSchema/Builder/Xml.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/Xml.php
@@ -7,10 +7,21 @@
 class HTMLPurifier_ConfigSchema_Builder_Xml extends XMLWriter
 {
 
+    /**
+     * @type HTMLPurifier_ConfigSchema_Interchange
+     */
     protected $interchange;
+
+    /**
+     * @type string
+     */
     private $namespace;
 
-    protected function writeHTMLDiv($html) {
+    /**
+     * @param string $html
+     */
+    protected function writeHTMLDiv($html)
+    {
         $this->startElement('div');
 
         $purifier = HTMLPurifier::getInstance();
@@ -21,12 +32,23 @@ class HTMLPurifier_ConfigSchema_Builder_Xml extends XMLWriter
         $this->endElement(); // div
     }
 
-    protected function export($var) {
-        if ($var === array()) return 'array()';
+    /**
+     * @param mixed $var
+     * @return string
+     */
+    protected function export($var)
+    {
+        if ($var === array()) {
+            return 'array()';
+        }
         return var_export($var, true);
     }
 
-    public function build($interchange) {
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     */
+    public function build($interchange)
+    {
         // global access, only use as last resort
         $this->interchange = $interchange;
 
@@ -39,19 +61,26 @@ class HTMLPurifier_ConfigSchema_Builder_Xml extends XMLWriter
             $this->buildDirective($directive);
         }
 
-        if ($this->namespace) $this->endElement(); // namespace
+        if ($this->namespace) {
+            $this->endElement();
+        } // namespace
 
         $this->endElement(); // configdoc
         $this->flush();
     }
 
-    public function buildDirective($directive) {
-
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $directive
+     */
+    public function buildDirective($directive)
+    {
         // Kludge, although I suppose having a notion of a "root namespace"
         // certainly makes things look nicer when documentation is built.
         // Depends on things being sorted.
         if (!$this->namespace || $this->namespace !== $directive->id->getRootNamespace()) {
-            if ($this->namespace) $this->endElement(); // namespace
+            if ($this->namespace) {
+                $this->endElement();
+            } // namespace
             $this->namespace = $directive->id->getRootNamespace();
             $this->startElement('namespace');
             $this->writeAttribute('id', $this->namespace);
@@ -64,43 +93,52 @@ class HTMLPurifier_ConfigSchema_Builder_Xml extends XMLWriter
         $this->writeElement('name', $directive->id->getDirective());
 
         $this->startElement('aliases');
-            foreach ($directive->aliases as $alias) $this->writeElement('alias', $alias->toString());
+        foreach ($directive->aliases as $alias) {
+            $this->writeElement('alias', $alias->toString());
+        }
         $this->endElement(); // aliases
 
         $this->startElement('constraints');
-            if ($directive->version) $this->writeElement('version', $directive->version);
-            $this->startElement('type');
-                if ($directive->typeAllowsNull) $this->writeAttribute('allow-null', 'yes');
-                $this->text($directive->type);
-            $this->endElement(); // type
-            if ($directive->allowed) {
-                $this->startElement('allowed');
-                    foreach ($directive->allowed as $value => $x) $this->writeElement('value', $value);
-                $this->endElement(); // allowed
+        if ($directive->version) {
+            $this->writeElement('version', $directive->version);
+        }
+        $this->startElement('type');
+        if ($directive->typeAllowsNull) {
+            $this->writeAttribute('allow-null', 'yes');
+        }
+        $this->text($directive->type);
+        $this->endElement(); // type
+        if ($directive->allowed) {
+            $this->startElement('allowed');
+            foreach ($directive->allowed as $value => $x) {
+                $this->writeElement('value', $value);
             }
-            $this->writeElement('default', $this->export($directive->default));
-            $this->writeAttribute('xml:space', 'preserve');
-            if ($directive->external) {
-                $this->startElement('external');
-                    foreach ($directive->external as $project) $this->writeElement('project', $project);
-                $this->endElement();
+            $this->endElement(); // allowed
+        }
+        $this->writeElement('default', $this->export($directive->default));
+        $this->writeAttribute('xml:space', 'preserve');
+        if ($directive->external) {
+            $this->startElement('external');
+            foreach ($directive->external as $project) {
+                $this->writeElement('project', $project);
             }
+            $this->endElement();
+        }
         $this->endElement(); // constraints
 
         if ($directive->deprecatedVersion) {
             $this->startElement('deprecated');
-                $this->writeElement('version', $directive->deprecatedVersion);
-                $this->writeElement('use', $directive->deprecatedUse->toString());
+            $this->writeElement('version', $directive->deprecatedVersion);
+            $this->writeElement('use', $directive->deprecatedUse->toString());
             $this->endElement(); // deprecated
         }
 
         $this->startElement('description');
-            $this->writeHTMLDiv($directive->description);
+        $this->writeHTMLDiv($directive->description);
         $this->endElement(); // description
 
         $this->endElement(); // directive
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Exception.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Exception.php
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/Exception.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Exception.php
diff --git a/library/HTMLPurifier/ConfigSchema/Interchange.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange.php
similarity index 76%
rename from library/HTMLPurifier/ConfigSchema/Interchange.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange.php
index 91a5aa7303..0e08ae8fe7 100644
--- a/library/HTMLPurifier/ConfigSchema/Interchange.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange.php
@@ -10,18 +10,23 @@ class HTMLPurifier_ConfigSchema_Interchange
 
     /**
      * Name of the application this schema is describing.
+     * @type string
      */
     public $name;
 
     /**
      * Array of Directive ID => array(directive info)
+     * @type HTMLPurifier_ConfigSchema_Interchange_Directive[]
      */
     public $directives = array();
 
     /**
      * Adds a directive array to $directives
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $directive
+     * @throws HTMLPurifier_ConfigSchema_Exception
      */
-    public function addDirective($directive) {
+    public function addDirective($directive)
+    {
         if (isset($this->directives[$i = $directive->id->toString()])) {
             throw new HTMLPurifier_ConfigSchema_Exception("Cannot redefine directive '$i'");
         }
@@ -32,11 +37,11 @@ class HTMLPurifier_ConfigSchema_Interchange
      * Convenience function to perform standard validation. Throws exception
      * on failed validation.
      */
-    public function validate() {
+    public function validate()
+    {
         $validator = new HTMLPurifier_ConfigSchema_Validator();
         return $validator->validate($this);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Interchange/Directive.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Directive.php
similarity index 65%
rename from library/HTMLPurifier/ConfigSchema/Interchange/Directive.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Directive.php
index ac8be0d970..127a39a673 100644
--- a/library/HTMLPurifier/ConfigSchema/Interchange/Directive.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Directive.php
@@ -7,71 +7,83 @@ class HTMLPurifier_ConfigSchema_Interchange_Directive
 {
 
     /**
-     * ID of directive, instance of HTMLPurifier_ConfigSchema_Interchange_Id.
+     * ID of directive.
+     * @type HTMLPurifier_ConfigSchema_Interchange_Id
      */
     public $id;
 
     /**
-     * String type, e.g. 'integer' or 'istring'.
+     * Type, e.g. 'integer' or 'istring'.
+     * @type string
      */
     public $type;
 
     /**
      * Default value, e.g. 3 or 'DefaultVal'.
+     * @type mixed
      */
     public $default;
 
     /**
      * HTML description.
+     * @type string
      */
     public $description;
 
     /**
-     * Boolean whether or not null is allowed as a value.
+     * Whether or not null is allowed as a value.
+     * @type bool
      */
     public $typeAllowsNull = false;
 
     /**
-     * Lookup table of allowed scalar values, e.g. array('allowed' => true).
+     * Lookup table of allowed scalar values.
+     * e.g. array('allowed' => true).
      * Null if all values are allowed.
+     * @type array
      */
     public $allowed;
 
     /**
-     * List of aliases for the directive,
+     * List of aliases for the directive.
      * e.g. array(new HTMLPurifier_ConfigSchema_Interchange_Id('Ns', 'Dir'))).
+     * @type HTMLPurifier_ConfigSchema_Interchange_Id[]
      */
     public $aliases = array();
 
     /**
      * Hash of value aliases, e.g. array('alt' => 'real'). Null if value
      * aliasing is disabled (necessary for non-scalar types).
+     * @type array
      */
     public $valueAliases;
 
     /**
      * Version of HTML Purifier the directive was introduced, e.g. '1.3.1'.
      * Null if the directive has always existed.
+     * @type string
      */
     public $version;
 
     /**
-     * ID of directive that supercedes this old directive, is an instance
-     * of HTMLPurifier_ConfigSchema_Interchange_Id. Null if not deprecated.
+     * ID of directive that supercedes this old directive.
+     * Null if not deprecated.
+     * @type HTMLPurifier_ConfigSchema_Interchange_Id
      */
     public $deprecatedUse;
 
     /**
      * Version of HTML Purifier this directive was deprecated. Null if not
      * deprecated.
+     * @type string
      */
     public $deprecatedVersion;
 
     /**
      * List of external projects this directive depends on, e.g. array('CSSTidy').
+     * @type array
      */
     public $external = array();
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Interchange/Id.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Id.php
similarity index 54%
rename from library/HTMLPurifier/ConfigSchema/Interchange/Id.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Id.php
index b9b3c6f5cf..126f09d957 100644
--- a/library/HTMLPurifier/ConfigSchema/Interchange/Id.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Interchange/Id.php
@@ -6,32 +6,53 @@
 class HTMLPurifier_ConfigSchema_Interchange_Id
 {
 
+    /**
+     * @type string
+     */
     public $key;
 
-    public function __construct($key) {
+    /**
+     * @param string $key
+     */
+    public function __construct($key)
+    {
         $this->key = $key;
     }
 
     /**
+     * @return string
      * @warning This is NOT magic, to ensure that people don't abuse SPL and
      *          cause problems for PHP 5.0 support.
      */
-    public function toString() {
+    public function toString()
+    {
         return $this->key;
     }
 
-    public function getRootNamespace() {
+    /**
+     * @return string
+     */
+    public function getRootNamespace()
+    {
         return substr($this->key, 0, strpos($this->key, "."));
     }
 
-    public function getDirective() {
+    /**
+     * @return string
+     */
+    public function getDirective()
+    {
         return substr($this->key, strpos($this->key, ".") + 1);
     }
 
-    public static function make($id) {
+    /**
+     * @param string $id
+     * @return HTMLPurifier_ConfigSchema_Interchange_Id
+     */
+    public static function make($id)
+    {
         return new HTMLPurifier_ConfigSchema_Interchange_Id($id);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
similarity index 67%
rename from library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
index 785b72ce8e..655e6dd1b9 100644
--- a/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
@@ -5,21 +5,39 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
 
     /**
      * Used for processing DEFAULT, nothing else.
+     * @type HTMLPurifier_VarParser
      */
     protected $varParser;
 
-    public function __construct($varParser = null) {
+    /**
+     * @param HTMLPurifier_VarParser $varParser
+     */
+    public function __construct($varParser = null)
+    {
         $this->varParser = $varParser ? $varParser : new HTMLPurifier_VarParser_Native();
     }
 
-    public static function buildFromDirectory($dir = null) {
-        $builder     = new HTMLPurifier_ConfigSchema_InterchangeBuilder();
+    /**
+     * @param string $dir
+     * @return HTMLPurifier_ConfigSchema_Interchange
+     */
+    public static function buildFromDirectory($dir = null)
+    {
+        $builder = new HTMLPurifier_ConfigSchema_InterchangeBuilder();
         $interchange = new HTMLPurifier_ConfigSchema_Interchange();
         return $builder->buildDir($interchange, $dir);
     }
 
-    public function buildDir($interchange, $dir = null) {
-        if (!$dir) $dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema';
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     * @param string $dir
+     * @return HTMLPurifier_ConfigSchema_Interchange
+     */
+    public function buildDir($interchange, $dir = null)
+    {
+        if (!$dir) {
+            $dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema';
+        }
         if (file_exists($dir . '/info.ini')) {
             $info = parse_ini_file($dir . '/info.ini');
             $interchange->name = $info['name'];
@@ -39,24 +57,30 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
         foreach ($files as $file) {
             $this->buildFile($interchange, $dir . '/' . $file);
         }
-
         return $interchange;
     }
 
-    public function buildFile($interchange, $file) {
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     * @param string $file
+     */
+    public function buildFile($interchange, $file)
+    {
         $parser = new HTMLPurifier_StringHashParser();
         $this->build(
             $interchange,
-            new HTMLPurifier_StringHash( $parser->parseFile($file) )
+            new HTMLPurifier_StringHash($parser->parseFile($file))
         );
     }
 
     /**
      * Builds an interchange object based on a hash.
-     * @param $interchange HTMLPurifier_ConfigSchema_Interchange object to build
-     * @param $hash HTMLPurifier_ConfigSchema_StringHash source data
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange HTMLPurifier_ConfigSchema_Interchange object to build
+     * @param HTMLPurifier_StringHash $hash source data
+     * @throws HTMLPurifier_ConfigSchema_Exception
      */
-    public function build($interchange, $hash) {
+    public function build($interchange, $hash)
+    {
         if (!$hash instanceof HTMLPurifier_StringHash) {
             $hash = new HTMLPurifier_StringHash($hash);
         }
@@ -75,7 +99,13 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
         $this->_findUnused($hash);
     }
 
-    public function buildDirective($interchange, $hash) {
+    /**
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     * @param HTMLPurifier_StringHash $hash
+     * @throws HTMLPurifier_ConfigSchema_Exception
+     */
+    public function buildDirective($interchange, $hash)
+    {
         $directive = new HTMLPurifier_ConfigSchema_Interchange_Directive();
 
         // These are required elements:
@@ -84,7 +114,9 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
 
         if (isset($hash['TYPE'])) {
             $type = explode('/', $hash->offsetGet('TYPE'));
-            if (isset($type[1])) $directive->typeAllowsNull = true;
+            if (isset($type[1])) {
+                $directive->typeAllowsNull = true;
+            }
             $directive->type = $type[0];
         } else {
             throw new HTMLPurifier_ConfigSchema_Exception("TYPE in directive hash '$id' not defined");
@@ -92,7 +124,11 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
 
         if (isset($hash['DEFAULT'])) {
             try {
-                $directive->default = $this->varParser->parse($hash->offsetGet('DEFAULT'), $directive->type, $directive->typeAllowsNull);
+                $directive->default = $this->varParser->parse(
+                    $hash->offsetGet('DEFAULT'),
+                    $directive->type,
+                    $directive->typeAllowsNull
+                );
             } catch (HTMLPurifier_VarParserException $e) {
                 throw new HTMLPurifier_ConfigSchema_Exception($e->getMessage() . " in DEFAULT in directive hash '$id'");
             }
@@ -139,34 +175,45 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
 
     /**
      * Evaluates an array PHP code string without array() wrapper
+     * @param string $contents
      */
-    protected function evalArray($contents) {
-        return eval('return array('. $contents .');');
+    protected function evalArray($contents)
+    {
+        return eval('return array(' . $contents . ');');
     }
 
     /**
      * Converts an array list into a lookup array.
+     * @param array $array
+     * @return array
      */
-    protected function lookup($array) {
+    protected function lookup($array)
+    {
         $ret = array();
-        foreach ($array as $val) $ret[$val] = true;
+        foreach ($array as $val) {
+            $ret[$val] = true;
+        }
         return $ret;
     }
 
     /**
      * Convenience function that creates an HTMLPurifier_ConfigSchema_Interchange_Id
      * object based on a string Id.
+     * @param string $id
+     * @return HTMLPurifier_ConfigSchema_Interchange_Id
      */
-    protected function id($id) {
+    protected function id($id)
+    {
         return HTMLPurifier_ConfigSchema_Interchange_Id::make($id);
     }
 
     /**
      * Triggers errors for any unused keys passed in the hash; such keys
      * may indicate typos, missing values, etc.
-     * @param $hash Instance of ConfigSchema_StringHash to check.
+     * @param HTMLPurifier_StringHash $hash Hash to check.
      */
-    protected function _findUnused($hash) {
+    protected function _findUnused($hash)
+    {
         $accessed = $hash->getAccessed();
         foreach ($hash as $k => $v) {
             if (!isset($accessed[$k])) {
@@ -174,7 +221,6 @@ class HTMLPurifier_ConfigSchema_InterchangeBuilder
             }
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/Validator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Validator.php
similarity index 73%
rename from library/HTMLPurifier/ConfigSchema/Validator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Validator.php
index f374f6a022..fb31277889 100644
--- a/library/HTMLPurifier/ConfigSchema/Validator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Validator.php
@@ -12,36 +12,48 @@ class HTMLPurifier_ConfigSchema_Validator
 {
 
     /**
-     * Easy to access global objects.
+     * @type HTMLPurifier_ConfigSchema_Interchange
      */
-    protected $interchange, $aliases;
+    protected $interchange;
+
+    /**
+     * @type array
+     */
+    protected $aliases;
 
     /**
      * Context-stack to provide easy to read error messages.
+     * @type array
      */
     protected $context = array();
 
     /**
-     * HTMLPurifier_VarParser to test default's type.
+     * to test default's type.
+     * @type HTMLPurifier_VarParser
      */
     protected $parser;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->parser = new HTMLPurifier_VarParser();
     }
 
     /**
-     * Validates a fully-formed interchange object. Throws an
-     * HTMLPurifier_ConfigSchema_Exception if there's a problem.
+     * Validates a fully-formed interchange object.
+     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
+     * @return bool
      */
-    public function validate($interchange) {
+    public function validate($interchange)
+    {
         $this->interchange = $interchange;
         $this->aliases = array();
         // PHP is a bit lax with integer <=> string conversions in
         // arrays, so we don't use the identical !== comparison
         foreach ($interchange->directives as $i => $directive) {
             $id = $directive->id->toString();
-            if ($i != $id) $this->error(false, "Integrity violation: key '$i' does not match internal id '$id'");
+            if ($i != $id) {
+                $this->error(false, "Integrity violation: key '$i' does not match internal id '$id'");
+            }
             $this->validateDirective($directive);
         }
         return true;
@@ -49,8 +61,10 @@ class HTMLPurifier_ConfigSchema_Validator
 
     /**
      * Validates a HTMLPurifier_ConfigSchema_Interchange_Id object.
+     * @param HTMLPurifier_ConfigSchema_Interchange_Id $id
      */
-    public function validateId($id) {
+    public function validateId($id)
+    {
         $id_string = $id->toString();
         $this->context[] = "id '$id_string'";
         if (!$id instanceof HTMLPurifier_ConfigSchema_Interchange_Id) {
@@ -67,8 +81,10 @@ class HTMLPurifier_ConfigSchema_Validator
 
     /**
      * Validates a HTMLPurifier_ConfigSchema_Interchange_Directive object.
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $d
      */
-    public function validateDirective($d) {
+    public function validateDirective($d)
+    {
         $id = $d->id->toString();
         $this->context[] = "directive '$id'";
         $this->validateId($d->id);
@@ -108,9 +124,13 @@ class HTMLPurifier_ConfigSchema_Validator
     /**
      * Extra validation if $allowed member variable of
      * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $d
      */
-    public function validateDirectiveAllowed($d) {
-        if (is_null($d->allowed)) return;
+    public function validateDirectiveAllowed($d)
+    {
+        if (is_null($d->allowed)) {
+            return;
+        }
         $this->with($d, 'allowed')
             ->assertNotEmpty()
             ->assertIsLookup(); // handled by InterchangeBuilder
@@ -119,7 +139,9 @@ class HTMLPurifier_ConfigSchema_Validator
         }
         $this->context[] = 'allowed';
         foreach ($d->allowed as $val => $x) {
-            if (!is_string($val)) $this->error("value $val", 'must be a string');
+            if (!is_string($val)) {
+                $this->error("value $val", 'must be a string');
+            }
         }
         array_pop($this->context);
     }
@@ -127,15 +149,23 @@ class HTMLPurifier_ConfigSchema_Validator
     /**
      * Extra validation if $valueAliases member variable of
      * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $d
      */
-    public function validateDirectiveValueAliases($d) {
-        if (is_null($d->valueAliases)) return;
+    public function validateDirectiveValueAliases($d)
+    {
+        if (is_null($d->valueAliases)) {
+            return;
+        }
         $this->with($d, 'valueAliases')
             ->assertIsArray(); // handled by InterchangeBuilder
         $this->context[] = 'valueAliases';
         foreach ($d->valueAliases as $alias => $real) {
-            if (!is_string($alias)) $this->error("alias $alias", 'must be a string');
-            if (!is_string($real))  $this->error("alias target $real from alias '$alias'",  'must be a string');
+            if (!is_string($alias)) {
+                $this->error("alias $alias", 'must be a string');
+            }
+            if (!is_string($real)) {
+                $this->error("alias target $real from alias '$alias'", 'must be a string');
+            }
             if ($alias === $real) {
                 $this->error("alias '$alias'", "must not be an alias to itself");
             }
@@ -155,8 +185,10 @@ class HTMLPurifier_ConfigSchema_Validator
     /**
      * Extra validation if $aliases member variable of
      * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
+     * @param HTMLPurifier_ConfigSchema_Interchange_Directive $d
      */
-    public function validateDirectiveAliases($d) {
+    public function validateDirectiveAliases($d)
+    {
         $this->with($d, 'aliases')
             ->assertIsArray(); // handled by InterchangeBuilder
         $this->context[] = 'aliases';
@@ -180,27 +212,37 @@ class HTMLPurifier_ConfigSchema_Validator
     /**
      * Convenience function for generating HTMLPurifier_ConfigSchema_ValidatorAtom
      * for validating simple member variables of objects.
+     * @param $obj
+     * @param $member
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
      */
-    protected function with($obj, $member) {
+    protected function with($obj, $member)
+    {
         return new HTMLPurifier_ConfigSchema_ValidatorAtom($this->getFormattedContext(), $obj, $member);
     }
 
     /**
      * Emits an error, providing helpful context.
+     * @throws HTMLPurifier_ConfigSchema_Exception
      */
-    protected function error($target, $msg) {
-        if ($target !== false) $prefix = ucfirst($target) . ' in ' .  $this->getFormattedContext();
-        else $prefix = ucfirst($this->getFormattedContext());
+    protected function error($target, $msg)
+    {
+        if ($target !== false) {
+            $prefix = ucfirst($target) . ' in ' . $this->getFormattedContext();
+        } else {
+            $prefix = ucfirst($this->getFormattedContext());
+        }
         throw new HTMLPurifier_ConfigSchema_Exception(trim($prefix . ' ' . $msg));
     }
 
     /**
      * Returns a formatted context string.
+     * @return string
      */
-    protected function getFormattedContext() {
+    protected function getFormattedContext()
+    {
         return implode(' in ', array_reverse($this->context));
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php
new file mode 100644
index 0000000000..c9aa3644af
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/ValidatorAtom.php
@@ -0,0 +1,130 @@
+<?php
+
+/**
+ * Fluent interface for validating the contents of member variables.
+ * This should be immutable. See HTMLPurifier_ConfigSchema_Validator for
+ * use-cases. We name this an 'atom' because it's ONLY for validations that
+ * are independent and usually scalar.
+ */
+class HTMLPurifier_ConfigSchema_ValidatorAtom
+{
+    /**
+     * @type string
+     */
+    protected $context;
+
+    /**
+     * @type object
+     */
+    protected $obj;
+
+    /**
+     * @type string
+     */
+    protected $member;
+
+    /**
+     * @type mixed
+     */
+    protected $contents;
+
+    public function __construct($context, $obj, $member)
+    {
+        $this->context = $context;
+        $this->obj = $obj;
+        $this->member = $member;
+        $this->contents =& $obj->$member;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertIsString()
+    {
+        if (!is_string($this->contents)) {
+            $this->error('must be a string');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertIsBool()
+    {
+        if (!is_bool($this->contents)) {
+            $this->error('must be a boolean');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertIsArray()
+    {
+        if (!is_array($this->contents)) {
+            $this->error('must be an array');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertNotNull()
+    {
+        if ($this->contents === null) {
+            $this->error('must not be null');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertAlnum()
+    {
+        $this->assertIsString();
+        if (!ctype_alnum($this->contents)) {
+            $this->error('must be alphanumeric');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertNotEmpty()
+    {
+        if (empty($this->contents)) {
+            $this->error('must not be empty');
+        }
+        return $this;
+    }
+
+    /**
+     * @return HTMLPurifier_ConfigSchema_ValidatorAtom
+     */
+    public function assertIsLookup()
+    {
+        $this->assertIsArray();
+        foreach ($this->contents as $v) {
+            if ($v !== true) {
+                $this->error('must be a lookup array');
+            }
+        }
+        return $this;
+    }
+
+    /**
+     * @param string $msg
+     * @throws HTMLPurifier_ConfigSchema_Exception
+     */
+    protected function error($msg)
+    {
+        throw new HTMLPurifier_ConfigSchema_Exception(ucfirst($this->member) . ' in ' . $this->context . ' ' . $msg);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema.ser b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema.ser
new file mode 100644
index 0000000000..1e6ccd2275
Binary files /dev/null and b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema.ser differ
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.Predicate.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.Predicate.txt
new file mode 100644
index 0000000000..6367fe23c9
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.Predicate.txt
@@ -0,0 +1,14 @@
+AutoFormat.RemoveEmpty.Predicate
+TYPE: hash
+VERSION: 4.7.0
+DEFAULT: array('colgroup' => array(), 'th' => array(), 'td' => array(), 'iframe' => array('src'))
+--DESCRIPTION--
+<p>
+  Given that an element has no contents, it will be removed by default, unless
+  this predicate dictates otherwise.  The predicate can either be an associative
+  map from tag name to list of attributes that must be present for the element
+  to be considered preserved: thus, the default always preserves <code>colgroup</code>,
+  <code>th</code> and <code>td</code>, and also <code>iframe</code> if it
+  has a <code>src</code>.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveSpansWithoutAttributes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveSpansWithoutAttributes.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveSpansWithoutAttributes.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveSpansWithoutAttributes.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedFonts.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedFonts.txt
new file mode 100644
index 0000000000..3fd4654065
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedFonts.txt
@@ -0,0 +1,12 @@
+CSS.AllowedFonts
+TYPE: lookup/null
+VERSION: 4.3.0
+DEFAULT: NULL
+--DESCRIPTION--
+<p>
+    Allows you to manually specify a set of allowed fonts.  If
+    <code>NULL</code>, all fonts are allowed.  This directive
+    affects generic names (serif, sans-serif, monospace, cursive,
+    fantasy) as well as specific font families.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.ForbiddenProperties.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.ForbiddenProperties.txt
new file mode 100644
index 0000000000..f1f5c5f12b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.ForbiddenProperties.txt
@@ -0,0 +1,13 @@
+CSS.ForbiddenProperties
+TYPE: lookup
+VERSION: 4.2.0
+DEFAULT: array()
+--DESCRIPTION--
+<p>
+    This is the logical inverse of %CSS.AllowedProperties, and it will
+    override that directive or any other directive.  If possible,
+    %CSS.AllowedProperties is recommended over this directive,
+    because it can sometimes be difficult to tell whether or not you've
+    forbidden all of the CSS properties you truly would like to disallow.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Trusted.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Trusted.txt
new file mode 100644
index 0000000000..e733a61e8a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Trusted.txt
@@ -0,0 +1,9 @@
+CSS.Trusted
+TYPE: bool
+VERSION: 4.2.1
+DEFAULT: false
+--DESCRIPTION--
+Indicates whether or not the user's CSS input is trusted or not. If the
+input is trusted, a more expansive set of allowed properties.  See
+also %HTML.Trusted.
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPermissions.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPermissions.txt
new file mode 100644
index 0000000000..b2b83d9ab6
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPermissions.txt
@@ -0,0 +1,11 @@
+Cache.SerializerPermissions
+TYPE: int
+VERSION: 4.3.0
+DEFAULT: 0755
+--DESCRIPTION--
+
+<p>
+    Directory permissions of the files and directories created inside
+    the DefinitionCache/Serializer or other custom serializer path.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.AllowHostnameUnderscore.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.AllowHostnameUnderscore.txt
new file mode 100644
index 0000000000..2c910cc7de
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.AllowHostnameUnderscore.txt
@@ -0,0 +1,16 @@
+Core.AllowHostnameUnderscore
+TYPE: bool
+VERSION: 4.6.0
+DEFAULT: false
+--DESCRIPTION--
+<p>
+    By RFC 1123, underscores are not permitted in host names.
+    (This is in contrast to the specification for DNS, RFC
+    2181, which allows underscores.)
+    However, most browsers do the right thing when faced with
+    an underscore in the host name, and so some poorly written
+    websites are written with the expectation this should work.
+    Setting this parameter to true relaxes our allowed character
+    check so that underscores are permitted.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
similarity index 84%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
index 08b381d34c..c572c14ec1 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
@@ -24,5 +24,6 @@ array (
 --DESCRIPTION--
 
 Lookup array of color names to six digit hexadecimal number corresponding
-to color, with preceding hash mark. Used when parsing colors.
+to color, with preceding hash mark. Used when parsing colors.  The lookup
+is done in a case-insensitive manner.
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.DisableExcludes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.DisableExcludes.txt
new file mode 100644
index 0000000000..1cd4c2c964
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.DisableExcludes.txt
@@ -0,0 +1,14 @@
+Core.DisableExcludes
+TYPE: bool
+DEFAULT: false
+VERSION: 4.5.0
+--DESCRIPTION--
+<p>
+  This directive disables SGML-style exclusions, e.g. the exclusion of
+  <code>&lt;object&gt;</code> in any descendant of a
+  <code>&lt;pre&gt;</code> tag.  Disabling excludes will allow some
+  invalid documents to pass through HTML Purifier, but HTML Purifier
+  will also be less likely to accidentally remove large documents during
+  processing.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EnableIDNA.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EnableIDNA.txt
new file mode 100644
index 0000000000..ce243c35dc
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EnableIDNA.txt
@@ -0,0 +1,9 @@
+Core.EnableIDNA
+TYPE: bool
+DEFAULT: false
+VERSION: 4.4.0
+--DESCRIPTION--
+Allows international domain names in URLs.  This configuration option
+requires the PEAR Net_IDNA2 module to be installed.  It operates by
+punycoding any internationalized host names for maximum portability.
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
similarity index 62%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
index 4d5b5055cd..a3881be75c 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
@@ -2,9 +2,11 @@ Core.EscapeInvalidChildren
 TYPE: bool
 DEFAULT: false
 --DESCRIPTION--
-When true, a child is found that is not allowed in the context of the
+<p><strong>Warning:</strong> this configuration option is no longer does anything as of 4.6.0.</p>
+
+<p>When true, a child is found that is not allowed in the context of the
 parent element will be transformed into text as if it were ASCII. When
 false, that element and all internal tags will be dropped, though text will
 be preserved.  There is no option for dropping the element but preserving
-child nodes.
+child nodes.</p>
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.Language.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.Language.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.Language.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.Language.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.NormalizeNewlines.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.NormalizeNewlines.txt
new file mode 100644
index 0000000000..d77f5360d7
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.NormalizeNewlines.txt
@@ -0,0 +1,11 @@
+Core.NormalizeNewlines
+TYPE: bool
+VERSION: 4.2.0
+DEFAULT: true
+--DESCRIPTION--
+<p>
+    Whether or not to normalize newlines to the operating
+    system default.  When <code>false</code>, HTML Purifier
+    will attempt to preserve mixed newline files.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveProcessingInstructions.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveProcessingInstructions.txt
new file mode 100644
index 0000000000..3397d9f71f
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveProcessingInstructions.txt
@@ -0,0 +1,11 @@
+Core.RemoveProcessingInstructions
+TYPE: bool
+VERSION: 4.2.0
+DEFAULT: false
+--DESCRIPTION--
+Instead of escaping processing instructions in the form <code>&lt;? ...
+?&gt;</code>, remove it out-right.  This may be useful if the HTML
+you are validating contains XML processing instruction gunk, however,
+it can also be user-unfriendly for people attempting to post PHP
+snippets.
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
similarity index 65%
rename from library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
index 7fa6536b2c..321eaa2d80 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
@@ -3,6 +3,11 @@ TYPE: bool
 VERSION: 3.1.0
 DEFAULT: false
 --DESCRIPTION--
+<p>
+  <strong>Warning:</strong> Deprecated in favor of %HTML.SafeObject and
+  %Output.FlashCompat (turn both on to allow YouTube videos and other
+  Flash content).
+</p>
 <p>
   This directive enables YouTube video embedding in HTML Purifier. Check
   <a href="http://htmlpurifier.org/docs/enduser-youtube.html">this document
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
similarity index 54%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
index 3e231d2d16..0b2c106da5 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
@@ -5,11 +5,14 @@ DEFAULT: NULL
 --DESCRIPTION--
 
 <p>
-    This is a convenience directive that rolls the functionality of
-    %HTML.AllowedElements and %HTML.AllowedAttributes into one directive.
+    This is a preferred convenience directive that combines
+    %HTML.AllowedElements and %HTML.AllowedAttributes.
     Specify elements and attributes that are allowed using:
-    <code>element1[attr1|attr2],element2...</code>. You can also use
-    newlines instead of commas to separate elements.
+    <code>element1[attr1|attr2],element2...</code>.  For example,
+    if you would like to only allow paragraphs and links, specify
+    <code>a[href],p</code>.  You can specify attributes that apply
+    to all elements using an asterisk, e.g. <code>*[lang]</code>.
+    You can also use newlines instead of commas to separate elements.
 </p>
 <p>
     <strong>Warning</strong>:
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedComments.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedComments.txt
new file mode 100644
index 0000000000..140e21423e
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedComments.txt
@@ -0,0 +1,10 @@
+HTML.AllowedComments
+TYPE: lookup
+VERSION: 4.4.0
+DEFAULT: array()
+--DESCRIPTION--
+A whitelist which indicates what explicit comment bodies should be
+allowed, modulo leading and trailing whitespace.  See also %HTML.AllowedCommentsRegexp
+(these directives are union'ed together, so a comment is considered
+valid if any directive deems it valid.)
+--# vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedCommentsRegexp.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedCommentsRegexp.txt
new file mode 100644
index 0000000000..f22e977d43
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedCommentsRegexp.txt
@@ -0,0 +1,15 @@
+HTML.AllowedCommentsRegexp
+TYPE: string/null
+VERSION: 4.4.0
+DEFAULT: NULL
+--DESCRIPTION--
+A regexp, which if it matches the body of a comment, indicates that
+it should be allowed. Trailing and leading spaces are removed prior
+to running this regular expression.
+<strong>Warning:</strong> Make sure you specify
+correct anchor metacharacters <code>^regex$</code>, otherwise you may accept
+comments that you did not mean to! In particular, the regex <code>/foo|bar/</code>
+is probably not sufficiently strict, since it also allows <code>foobar</code>.
+See also %HTML.AllowedComments (these directives are union'ed together,
+so a comment is considered valid if any directive deems it valid.)
+--# vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
new file mode 100644
index 0000000000..1d3fa7907d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
@@ -0,0 +1,23 @@
+HTML.AllowedElements
+TYPE: lookup/null
+VERSION: 1.3.0
+DEFAULT: NULL
+--DESCRIPTION--
+<p>
+    If HTML Purifier's tag set is unsatisfactory for your needs, you can
+    overload it with your own list of tags to allow.  If you change
+    this, you probably also want to change %HTML.AllowedAttributes; see
+    also %HTML.Allowed which lets you set allowed elements and
+    attributes at the same time.
+</p>
+<p>
+    If you attempt to allow an element that HTML Purifier does not know
+    about, HTML Purifier will raise an error.  You will need to manually
+    tell HTML Purifier about this element by using the
+    <a href="http://htmlpurifier.org/docs/enduser-customize.html">advanced customization features.</a>
+</p>
+<p>
+    <strong>Warning:</strong> If another directive conflicts with the
+    elements here, <em>that</em> directive will win and override.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
similarity index 72%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
index a64e3d7c36..6ed70b599f 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
@@ -4,6 +4,6 @@ VERSION: 2.0.1
 DEFAULT: NULL
 --DESCRIPTION--
 
-A custom doctype for power-users who defined there own document
+A custom doctype for power-users who defined their own document
 type. This directive only applies when %HTML.Doctype is blank.
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.FlashAllowFullScreen.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.FlashAllowFullScreen.txt
new file mode 100644
index 0000000000..7878dc0bf6
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.FlashAllowFullScreen.txt
@@ -0,0 +1,11 @@
+HTML.FlashAllowFullScreen
+TYPE: bool
+VERSION: 4.2.0
+DEFAULT: false
+--DESCRIPTION--
+<p>
+    Whether or not to permit embedded Flash content from
+    %HTML.SafeObject to expand to the full screen.  Corresponds to
+    the <code>allowFullScreen</code> parameter.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Nofollow.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Nofollow.txt
new file mode 100644
index 0000000000..700b30924a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Nofollow.txt
@@ -0,0 +1,7 @@
+HTML.Nofollow
+TYPE: bool
+VERSION: 4.3.0
+DEFAULT: FALSE
+--DESCRIPTION--
+If enabled, nofollow rel attributes are added to all outgoing links.
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeIframe.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeIframe.txt
new file mode 100644
index 0000000000..5eb6ec2b5a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeIframe.txt
@@ -0,0 +1,13 @@
+HTML.SafeIframe
+TYPE: bool
+VERSION: 4.4.0
+DEFAULT: false
+--DESCRIPTION--
+<p>
+    Whether or not to permit iframe tags in untrusted documents.  This
+    directive must be accompanied by a whitelist of permitted iframes,
+    such as %URI.SafeIframeRegexp, otherwise it will fatally error.
+    This directive has no effect on strict doctypes, as iframes are not
+    valid.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeScripting.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeScripting.txt
new file mode 100644
index 0000000000..5ebc7a19d5
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.SafeScripting.txt
@@ -0,0 +1,10 @@
+HTML.SafeScripting
+TYPE: lookup
+VERSION: 4.5.0
+DEFAULT: array()
+--DESCRIPTION--
+<p>
+    Whether or not to permit script tags to external scripts in documents.
+    Inline scripting is not allowed, and the script must match an explicit whitelist.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TargetBlank.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TargetBlank.txt
new file mode 100644
index 0000000000..587a16778b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TargetBlank.txt
@@ -0,0 +1,8 @@
+HTML.TargetBlank
+TYPE: bool
+VERSION: 4.4.0
+DEFAULT: FALSE
+--DESCRIPTION--
+If enabled, <code>target=blank</code> attributes are added to all outgoing links.
+(This includes links from an HTTPS version of a page to an HTTP version.)
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
similarity index 91%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
index 89133b1a38..1db9237e9e 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
@@ -5,4 +5,5 @@ DEFAULT: false
 --DESCRIPTION--
 Indicates whether or not the user input is trusted or not. If the input is
 trusted, a more expansive set of allowed tags and attributes will be used.
+See also %CSS.Trusted.
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.FixInnerHTML.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.FixInnerHTML.txt
new file mode 100644
index 0000000000..d6f0d9f295
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.FixInnerHTML.txt
@@ -0,0 +1,15 @@
+Output.FixInnerHTML
+TYPE: bool
+VERSION: 4.3.0
+DEFAULT: true
+--DESCRIPTION--
+<p>
+  If true, HTML Purifier will protect against Internet Explorer's
+  mishandling of the <code>innerHTML</code> attribute by appending
+  a space to any attribute that does not contain angled brackets, spaces
+  or quotes, but contains a backtick.  This slightly changes the
+  semantics of any given attribute, so if this is unacceptable and
+  you do not use <code>innerHTML</code> on any of your pages, you can
+  turn this directive off.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Output.FlashCompat.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.FlashCompat.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Output.FlashCompat.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.FlashCompat.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
similarity index 74%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
index ae3a913f24..666635a5ff 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
@@ -12,6 +12,6 @@ array (
 --DESCRIPTION--
 Whitelist that defines the schemes that a URI is allowed to have.  This
 prevents XSS attacks from using pseudo-schemes like javascript or mocha.
-There is also support for the <code>data</code> URI scheme, but it is not
-enabled by default.
+There is also support for the <code>data</code> and <code>file</code>
+URI schemes, but they are not enabled by default.
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.Base.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Base.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.Base.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Base.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
similarity index 64%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
index 51e6ea91f7..f891de4996 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
@@ -1,12 +1,15 @@
 URI.DisableResources
 TYPE: bool
-VERSION: 1.3.0
+VERSION: 4.2.0
 DEFAULT: false
 --DESCRIPTION--
-
 <p>
     Disables embedding resources, essentially meaning no pictures. You can
     still link to them though. See %URI.DisableExternalResources for why
     this might be a good idea.
 </p>
+<p>
+    <em>Note:</em> While this directive has been available since 1.3.0,
+    it didn't actually start doing anything until 4.2.0.
+</p>
 --# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.Host.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Host.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.Host.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Host.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
similarity index 93%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
index 0d00f62ea8..1e17c1d461 100644
--- a/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
@@ -11,7 +11,7 @@ DEFAULT: NULL
     to check if a URI has passed through HTML Purifier with this line:
 </p>
 
-<pre>$checksum === sha1($secret_key . ':' . $url)</pre>
+<pre>$checksum === hash_hmac("sha256", $url, $secret_key)</pre>
 
 <p>
     If the output is TRUE, the redirector script should accept the URI.
diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.SafeIframeRegexp.txt b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.SafeIframeRegexp.txt
new file mode 100644
index 0000000000..79084832be
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.SafeIframeRegexp.txt
@@ -0,0 +1,22 @@
+URI.SafeIframeRegexp
+TYPE: string/null
+VERSION: 4.4.0
+DEFAULT: NULL
+--DESCRIPTION--
+<p>
+    A PCRE regular expression that will be matched against an iframe URI.  This is
+    a relatively inflexible scheme, but works well enough for the most common
+    use-case of iframes: embedded video.  This directive only has an effect if
+    %HTML.SafeIframe is enabled.  Here are some example values:
+</p>
+<ul>
+    <li><code>%^http://www.youtube.com/embed/%</code> - Allow YouTube videos</li>
+    <li><code>%^http://player.vimeo.com/video/%</code> - Allow Vimeo videos</li>
+    <li><code>%^http://(www.youtube.com/embed/|player.vimeo.com/video/)%</code> - Allow both</li>
+</ul>
+<p>
+    Note that this directive does not give you enough granularity to, say, disable
+    all <code>autoplay</code> videos.  Pipe up on the HTML Purifier forums if this
+    is a capability you want.
+</p>
+--# vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ConfigSchema/schema/info.ini b/library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/info.ini
similarity index 100%
rename from library/HTMLPurifier/ConfigSchema/schema/info.ini
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/info.ini
diff --git a/library/HTMLPurifier/ContentSets.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ContentSets.php
similarity index 76%
rename from library/HTMLPurifier/ContentSets.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ContentSets.php
index 3b6e96f5f5..543e3f8f11 100644
--- a/library/HTMLPurifier/ContentSets.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ContentSets.php
@@ -7,35 +7,42 @@ class HTMLPurifier_ContentSets
 {
 
     /**
-     * List of content set strings (pipe seperators) indexed by name.
+     * List of content set strings (pipe separators) indexed by name.
+     * @type array
      */
     public $info = array();
 
     /**
      * List of content set lookups (element => true) indexed by name.
+     * @type array
      * @note This is in HTMLPurifier_HTMLDefinition->info_content_sets
      */
     public $lookup = array();
 
     /**
-     * Synchronized list of defined content sets (keys of info)
+     * Synchronized list of defined content sets (keys of info).
+     * @type array
      */
     protected $keys = array();
     /**
-     * Synchronized list of defined content values (values of info)
+     * Synchronized list of defined content values (values of info).
+     * @type array
      */
     protected $values = array();
 
     /**
      * Merges in module's content sets, expands identifiers in the content
      * sets and populates the keys, values and lookup member variables.
-     * @param $modules List of HTMLPurifier_HTMLModule
+     * @param HTMLPurifier_HTMLModule[] $modules List of HTMLPurifier_HTMLModule
      */
-    public function __construct($modules) {
-        if (!is_array($modules)) $modules = array($modules);
+    public function __construct($modules)
+    {
+        if (!is_array($modules)) {
+            $modules = array($modules);
+        }
         // populate content_sets based on module hints
         // sorry, no way of overloading
-        foreach ($modules as $module_i => $module) {
+        foreach ($modules as $module) {
             foreach ($module->content_sets as $key => $value) {
                 $temp = $this->convertToLookup($value);
                 if (isset($this->lookup[$key])) {
@@ -70,11 +77,14 @@ class HTMLPurifier_ContentSets
 
     /**
      * Accepts a definition; generates and assigns a ChildDef for it
-     * @param $def HTMLPurifier_ElementDef reference
-     * @param $module Module that defined the ElementDef
+     * @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef reference
+     * @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef
      */
-    public function generateChildDef(&$def, $module) {
-        if (!empty($def->child)) return; // already done!
+    public function generateChildDef(&$def, $module)
+    {
+        if (!empty($def->child)) { // already done!
+            return;
+        }
         $content_model = $def->content_model;
         if (is_string($content_model)) {
             // Assume that $this->keys is alphanumeric
@@ -89,7 +99,8 @@ class HTMLPurifier_ContentSets
         $def->child = $this->getChildDef($def, $module);
     }
 
-    public function generateChildDefCallback($matches) {
+    public function generateChildDefCallback($matches)
+    {
         return $this->info[$matches[0]];
     }
 
@@ -98,10 +109,12 @@ class HTMLPurifier_ContentSets
      * member variables in HTMLPurifier_ElementDef
      * @note This will also defer to modules for custom HTMLPurifier_ChildDef
      *       subclasses that need content set expansion
-     * @param $def HTMLPurifier_ElementDef to have ChildDef extracted
+     * @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef to have ChildDef extracted
+     * @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef
      * @return HTMLPurifier_ChildDef corresponding to ElementDef
      */
-    public function getChildDef($def, $module) {
+    public function getChildDef($def, $module)
+    {
         $value = $def->content_model;
         if (is_object($value)) {
             trigger_error(
@@ -126,7 +139,9 @@ class HTMLPurifier_ContentSets
         if ($module->defines_child_def) { // save a func call
             $return = $module->getChildDef($def);
         }
-        if ($return !== false) return $return;
+        if ($return !== false) {
+            return $return;
+        }
         // error-out
         trigger_error(
             'Could not determine which ChildDef class to instantiate',
@@ -138,18 +153,18 @@ class HTMLPurifier_ContentSets
     /**
      * Converts a string list of elements separated by pipes into
      * a lookup array.
-     * @param $string List of elements
-     * @return Lookup array of elements
+     * @param string $string List of elements
+     * @return array Lookup array of elements
      */
-    protected function convertToLookup($string) {
+    protected function convertToLookup($string)
+    {
         $array = explode('|', str_replace(' ', '', $string));
         $ret = array();
-        foreach ($array as $i => $k) {
+        foreach ($array as $k) {
             $ret[$k] = true;
         }
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Context.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Context.php
new file mode 100644
index 0000000000..00e509c85c
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Context.php
@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * Registry object that contains information about the current context.
+ * @warning Is a bit buggy when variables are set to null: it thinks
+ *          they don't exist! So use false instead, please.
+ * @note Since the variables Context deals with may not be objects,
+ *       references are very important here! Do not remove!
+ */
+class HTMLPurifier_Context
+{
+
+    /**
+     * Private array that stores the references.
+     * @type array
+     */
+    private $_storage = array();
+
+    /**
+     * Registers a variable into the context.
+     * @param string $name String name
+     * @param mixed $ref Reference to variable to be registered
+     */
+    public function register($name, &$ref)
+    {
+        if (array_key_exists($name, $this->_storage)) {
+            trigger_error(
+                "Name $name produces collision, cannot re-register",
+                E_USER_ERROR
+            );
+            return;
+        }
+        $this->_storage[$name] =& $ref;
+    }
+
+    /**
+     * Retrieves a variable reference from the context.
+     * @param string $name String name
+     * @param bool $ignore_error Boolean whether or not to ignore error
+     * @return mixed
+     */
+    public function &get($name, $ignore_error = false)
+    {
+        if (!array_key_exists($name, $this->_storage)) {
+            if (!$ignore_error) {
+                trigger_error(
+                    "Attempted to retrieve non-existent variable $name",
+                    E_USER_ERROR
+                );
+            }
+            $var = null; // so we can return by reference
+            return $var;
+        }
+        return $this->_storage[$name];
+    }
+
+    /**
+     * Destroys a variable in the context.
+     * @param string $name String name
+     */
+    public function destroy($name)
+    {
+        if (!array_key_exists($name, $this->_storage)) {
+            trigger_error(
+                "Attempted to destroy non-existent variable $name",
+                E_USER_ERROR
+            );
+            return;
+        }
+        unset($this->_storage[$name]);
+    }
+
+    /**
+     * Checks whether or not the variable exists.
+     * @param string $name String name
+     * @return bool
+     */
+    public function exists($name)
+    {
+        return array_key_exists($name, $this->_storage);
+    }
+
+    /**
+     * Loads a series of variables from an associative array
+     * @param array $context_array Assoc array of variables to load
+     */
+    public function loadArray($context_array)
+    {
+        foreach ($context_array as $key => $discard) {
+            $this->register($key, $context_array[$key]);
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Definition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Definition.php
new file mode 100644
index 0000000000..bc6d433647
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Definition.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Super-class for definition datatype objects, implements serialization
+ * functions for the class.
+ */
+abstract class HTMLPurifier_Definition
+{
+
+    /**
+     * Has setup() been called yet?
+     * @type bool
+     */
+    public $setup = false;
+
+    /**
+     * If true, write out the final definition object to the cache after
+     * setup.  This will be true only if all invocations to get a raw
+     * definition object are also optimized.  This does not cause file
+     * system thrashing because on subsequent calls the cached object
+     * is used and any writes to the raw definition object are short
+     * circuited.  See enduser-customize.html for the high-level
+     * picture.
+     * @type bool
+     */
+    public $optimized = null;
+
+    /**
+     * What type of definition is it?
+     * @type string
+     */
+    public $type;
+
+    /**
+     * Sets up the definition object into the final form, something
+     * not done by the constructor
+     * @param HTMLPurifier_Config $config
+     */
+    abstract protected function doSetup($config);
+
+    /**
+     * Setup function that aborts if already setup
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        if ($this->setup) {
+            return;
+        }
+        $this->setup = true;
+        $this->doSetup($config);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache.php
similarity index 66%
rename from library/HTMLPurifier/DefinitionCache.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache.php
index c6e1e388c6..67bb5b1e69 100644
--- a/library/HTMLPurifier/DefinitionCache.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache.php
@@ -10,22 +10,27 @@
  */
 abstract class HTMLPurifier_DefinitionCache
 {
-
+    /**
+     * @type string
+     */
     public $type;
 
     /**
-     * @param $name Type of definition objects this instance of the
+     * @param string $type Type of definition objects this instance of the
      *      cache will handle.
      */
-    public function __construct($type) {
+    public function __construct($type)
+    {
         $this->type = $type;
     }
 
     /**
      * Generates a unique identifier for a particular configuration
-     * @param Instance of HTMLPurifier_Config
+     * @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config
+     * @return string
      */
-    public function generateKey($config) {
+    public function generateKey($config)
+    {
         return $config->version . ',' . // possibly replace with function calls
                $config->getBatchSerial($this->type) . ',' .
                $config->get($this->type . '.DefinitionRev');
@@ -34,30 +39,37 @@ abstract class HTMLPurifier_DefinitionCache
     /**
      * Tests whether or not a key is old with respect to the configuration's
      * version and revision number.
-     * @param $key Key to test
-     * @param $config Instance of HTMLPurifier_Config to test against
+     * @param string $key Key to test
+     * @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config to test against
+     * @return bool
      */
-    public function isOld($key, $config) {
-        if (substr_count($key, ',') < 2) return true;
+    public function isOld($key, $config)
+    {
+        if (substr_count($key, ',') < 2) {
+            return true;
+        }
         list($version, $hash, $revision) = explode(',', $key, 3);
         $compare = version_compare($version, $config->version);
         // version mismatch, is always old
-        if ($compare != 0) return true;
+        if ($compare != 0) {
+            return true;
+        }
         // versions match, ids match, check revision number
-        if (
-            $hash == $config->getBatchSerial($this->type) &&
-            $revision < $config->get($this->type . '.DefinitionRev')
-        ) return true;
+        if ($hash == $config->getBatchSerial($this->type) &&
+            $revision < $config->get($this->type . '.DefinitionRev')) {
+            return true;
+        }
         return false;
     }
 
     /**
      * Checks if a definition's type jives with the cache's type
      * @note Throws an error on failure
-     * @param $def Definition object to check
-     * @return Boolean true if good, false if not
+     * @param HTMLPurifier_Definition $def Definition object to check
+     * @return bool true if good, false if not
      */
-    public function checkDefType($def) {
+    public function checkDefType($def)
+    {
         if ($def->type !== $this->type) {
             trigger_error("Cannot use definition of type {$def->type} in cache for {$this->type}");
             return false;
@@ -67,31 +79,40 @@ abstract class HTMLPurifier_DefinitionCache
 
     /**
      * Adds a definition object to the cache
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
      */
     abstract public function add($def, $config);
 
     /**
      * Unconditionally saves a definition object to the cache
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
      */
     abstract public function set($def, $config);
 
     /**
      * Replace an object in the cache
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
      */
     abstract public function replace($def, $config);
 
     /**
      * Retrieves a definition object from the cache
+     * @param HTMLPurifier_Config $config
      */
     abstract public function get($config);
 
     /**
      * Removes a definition object to the cache
+     * @param HTMLPurifier_Config $config
      */
     abstract public function remove($config);
 
     /**
      * Clears all objects from cache
+     * @param HTMLPurifier_Config $config
      */
     abstract public function flush($config);
 
@@ -100,9 +121,9 @@ abstract class HTMLPurifier_DefinitionCache
      * @note Be carefuly implementing this method as flush. Flush must
      *       not interfere with other Definition types, and cleanup()
      *       should not be repeatedly called by userland code.
+     * @param HTMLPurifier_Config $config
      */
     abstract public function cleanup($config);
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator.php
new file mode 100644
index 0000000000..b57a51b6cb
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator.php
@@ -0,0 +1,112 @@
+<?php
+
+class HTMLPurifier_DefinitionCache_Decorator extends HTMLPurifier_DefinitionCache
+{
+
+    /**
+     * Cache object we are decorating
+     * @type HTMLPurifier_DefinitionCache
+     */
+    public $cache;
+
+    /**
+     * The name of the decorator
+     * @var string
+     */
+    public $name;
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * Lazy decorator function
+     * @param HTMLPurifier_DefinitionCache $cache Reference to cache object to decorate
+     * @return HTMLPurifier_DefinitionCache_Decorator
+     */
+    public function decorate(&$cache)
+    {
+        $decorator = $this->copy();
+        // reference is necessary for mocks in PHP 4
+        $decorator->cache =& $cache;
+        $decorator->type = $cache->type;
+        return $decorator;
+    }
+
+    /**
+     * Cross-compatible clone substitute
+     * @return HTMLPurifier_DefinitionCache_Decorator
+     */
+    public function copy()
+    {
+        return new HTMLPurifier_DefinitionCache_Decorator();
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function add($def, $config)
+    {
+        return $this->cache->add($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function set($def, $config)
+    {
+        return $this->cache->set($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function replace($def, $config)
+    {
+        return $this->cache->replace($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function get($config)
+    {
+        return $this->cache->get($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function remove($config)
+    {
+        return $this->cache->remove($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function flush($config)
+    {
+        return $this->cache->flush($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function cleanup($config)
+    {
+        return $this->cache->cleanup($config);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
new file mode 100644
index 0000000000..4991777ce1
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * Definition cache decorator class that cleans up the cache
+ * whenever there is a cache miss.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Cleanup extends HTMLPurifier_DefinitionCache_Decorator
+{
+    /**
+     * @type string
+     */
+    public $name = 'Cleanup';
+
+    /**
+     * @return HTMLPurifier_DefinitionCache_Decorator_Cleanup
+     */
+    public function copy()
+    {
+        return new HTMLPurifier_DefinitionCache_Decorator_Cleanup();
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function add($def, $config)
+    {
+        $status = parent::add($def, $config);
+        if (!$status) {
+            parent::cleanup($config);
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function set($def, $config)
+    {
+        $status = parent::set($def, $config);
+        if (!$status) {
+            parent::cleanup($config);
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function replace($def, $config)
+    {
+        $status = parent::replace($def, $config);
+        if (!$status) {
+            parent::cleanup($config);
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function get($config)
+    {
+        $ret = parent::get($config);
+        if (!$ret) {
+            parent::cleanup($config);
+        }
+        return $ret;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php
new file mode 100644
index 0000000000..d529dce48d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * Definition cache decorator class that saves all cache retrievals
+ * to PHP's memory; good for unit tests or circumstances where
+ * there are lots of configuration objects floating around.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Memory extends HTMLPurifier_DefinitionCache_Decorator
+{
+    /**
+     * @type array
+     */
+    protected $definitions;
+
+    /**
+     * @type string
+     */
+    public $name = 'Memory';
+
+    /**
+     * @return HTMLPurifier_DefinitionCache_Decorator_Memory
+     */
+    public function copy()
+    {
+        return new HTMLPurifier_DefinitionCache_Decorator_Memory();
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function add($def, $config)
+    {
+        $status = parent::add($def, $config);
+        if ($status) {
+            $this->definitions[$this->generateKey($config)] = $def;
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function set($def, $config)
+    {
+        $status = parent::set($def, $config);
+        if ($status) {
+            $this->definitions[$this->generateKey($config)] = $def;
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function replace($def, $config)
+    {
+        $status = parent::replace($def, $config);
+        if ($status) {
+            $this->definitions[$this->generateKey($config)] = $def;
+        }
+        return $status;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function get($config)
+    {
+        $key = $this->generateKey($config);
+        if (isset($this->definitions[$key])) {
+            return $this->definitions[$key];
+        }
+        $this->definitions[$key] = parent::get($config);
+        return $this->definitions[$key];
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
new file mode 100644
index 0000000000..b1fec8d367
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
@@ -0,0 +1,82 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
+
+/**
+ * Definition cache decorator template.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Template extends HTMLPurifier_DefinitionCache_Decorator
+{
+
+    /**
+     * @type string
+     */
+    public $name = 'Template'; // replace this
+
+    public function copy()
+    {
+        // replace class name with yours
+        return new HTMLPurifier_DefinitionCache_Decorator_Template();
+    }
+
+    // remove methods you don't need
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function add($def, $config)
+    {
+        return parent::add($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function set($def, $config)
+    {
+        return parent::set($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function replace($def, $config)
+    {
+        return parent::replace($def, $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function get($config)
+    {
+        return parent::get($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function flush($config)
+    {
+        return parent::flush($config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return mixed
+     */
+    public function cleanup($config)
+    {
+        return parent::cleanup($config);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Null.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Null.php
new file mode 100644
index 0000000000..d9a75ce227
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Null.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * Null cache object to use when no caching is on.
+ */
+class HTMLPurifier_DefinitionCache_Null extends HTMLPurifier_DefinitionCache
+{
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function add($def, $config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function set($def, $config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function replace($def, $config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function remove($config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function get($config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function flush($config)
+    {
+        return false;
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function cleanup($config)
+    {
+        return false;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php
new file mode 100644
index 0000000000..ce268d91b4
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php
@@ -0,0 +1,291 @@
+<?php
+
+class HTMLPurifier_DefinitionCache_Serializer extends HTMLPurifier_DefinitionCache
+{
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return int|bool
+     */
+    public function add($def, $config)
+    {
+        if (!$this->checkDefType($def)) {
+            return;
+        }
+        $file = $this->generateFilePath($config);
+        if (file_exists($file)) {
+            return false;
+        }
+        if (!$this->_prepareDir($config)) {
+            return false;
+        }
+        return $this->_write($file, serialize($def), $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return int|bool
+     */
+    public function set($def, $config)
+    {
+        if (!$this->checkDefType($def)) {
+            return;
+        }
+        $file = $this->generateFilePath($config);
+        if (!$this->_prepareDir($config)) {
+            return false;
+        }
+        return $this->_write($file, serialize($def), $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Definition $def
+     * @param HTMLPurifier_Config $config
+     * @return int|bool
+     */
+    public function replace($def, $config)
+    {
+        if (!$this->checkDefType($def)) {
+            return;
+        }
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) {
+            return false;
+        }
+        if (!$this->_prepareDir($config)) {
+            return false;
+        }
+        return $this->_write($file, serialize($def), $config);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool|HTMLPurifier_Config
+     */
+    public function get($config)
+    {
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) {
+            return false;
+        }
+        return unserialize(file_get_contents($file));
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function remove($config)
+    {
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) {
+            return false;
+        }
+        return unlink($file);
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function flush($config)
+    {
+        if (!$this->_prepareDir($config)) {
+            return false;
+        }
+        $dir = $this->generateDirectoryPath($config);
+        $dh = opendir($dir);
+        while (false !== ($filename = readdir($dh))) {
+            if (empty($filename)) {
+                continue;
+            }
+            if ($filename[0] === '.') {
+                continue;
+            }
+            unlink($dir . '/' . $filename);
+        }
+    }
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function cleanup($config)
+    {
+        if (!$this->_prepareDir($config)) {
+            return false;
+        }
+        $dir = $this->generateDirectoryPath($config);
+        $dh = opendir($dir);
+        while (false !== ($filename = readdir($dh))) {
+            if (empty($filename)) {
+                continue;
+            }
+            if ($filename[0] === '.') {
+                continue;
+            }
+            $key = substr($filename, 0, strlen($filename) - 4);
+            if ($this->isOld($key, $config)) {
+                unlink($dir . '/' . $filename);
+            }
+        }
+    }
+
+    /**
+     * Generates the file path to the serial file corresponding to
+     * the configuration and definition name
+     * @param HTMLPurifier_Config $config
+     * @return string
+     * @todo Make protected
+     */
+    public function generateFilePath($config)
+    {
+        $key = $this->generateKey($config);
+        return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
+    }
+
+    /**
+     * Generates the path to the directory contain this cache's serial files
+     * @param HTMLPurifier_Config $config
+     * @return string
+     * @note No trailing slash
+     * @todo Make protected
+     */
+    public function generateDirectoryPath($config)
+    {
+        $base = $this->generateBaseDirectoryPath($config);
+        return $base . '/' . $this->type;
+    }
+
+    /**
+     * Generates path to base directory that contains all definition type
+     * serials
+     * @param HTMLPurifier_Config $config
+     * @return mixed|string
+     * @todo Make protected
+     */
+    public function generateBaseDirectoryPath($config)
+    {
+        $base = $config->get('Cache.SerializerPath');
+        $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
+        return $base;
+    }
+
+    /**
+     * Convenience wrapper function for file_put_contents
+     * @param string $file File name to write to
+     * @param string $data Data to write into file
+     * @param HTMLPurifier_Config $config
+     * @return int|bool Number of bytes written if success, or false if failure.
+     */
+    private function _write($file, $data, $config)
+    {
+        $result = file_put_contents($file, $data);
+        if ($result !== false) {
+            // set permissions of the new file (no execute)
+            $chmod = $config->get('Cache.SerializerPermissions');
+            if (!$chmod) {
+                $chmod = 0644; // invalid config or simpletest
+            }
+            $chmod = $chmod & 0666;
+            chmod($file, $chmod);
+        }
+        return $result;
+    }
+
+    /**
+     * Prepares the directory that this type stores the serials in
+     * @param HTMLPurifier_Config $config
+     * @return bool True if successful
+     */
+    private function _prepareDir($config)
+    {
+        $directory = $this->generateDirectoryPath($config);
+        $chmod = $config->get('Cache.SerializerPermissions');
+        if (!$chmod) {
+            $chmod = 0755; // invalid config or simpletest
+        }
+        if (!is_dir($directory)) {
+            $base = $this->generateBaseDirectoryPath($config);
+            if (!is_dir($base)) {
+                trigger_error(
+                    'Base directory ' . $base . ' does not exist,
+                    please create or change using %Cache.SerializerPath',
+                    E_USER_WARNING
+                );
+                return false;
+            } elseif (!$this->_testPermissions($base, $chmod)) {
+                return false;
+            }
+            mkdir($directory, $chmod);
+            if (!$this->_testPermissions($directory, $chmod)) {
+                trigger_error(
+                    'Base directory ' . $base . ' does not exist,
+                    please create or change using %Cache.SerializerPath',
+                    E_USER_WARNING
+                );
+                return false;
+            }
+        } elseif (!$this->_testPermissions($directory, $chmod)) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Tests permissions on a directory and throws out friendly
+     * error messages and attempts to chmod it itself if possible
+     * @param string $dir Directory path
+     * @param int $chmod Permissions
+     * @return bool True if directory is writable
+     */
+    private function _testPermissions($dir, $chmod)
+    {
+        // early abort, if it is writable, everything is hunky-dory
+        if (is_writable($dir)) {
+            return true;
+        }
+        if (!is_dir($dir)) {
+            // generally, you'll want to handle this beforehand
+            // so a more specific error message can be given
+            trigger_error(
+                'Directory ' . $dir . ' does not exist',
+                E_USER_WARNING
+            );
+            return false;
+        }
+        if (function_exists('posix_getuid')) {
+            // POSIX system, we can give more specific advice
+            if (fileowner($dir) === posix_getuid()) {
+                // we can chmod it ourselves
+                $chmod = $chmod | 0700;
+                if (chmod($dir, $chmod)) {
+                    return true;
+                }
+            } elseif (filegroup($dir) === posix_getgid()) {
+                $chmod = $chmod | 0070;
+            } else {
+                // PHP's probably running as nobody, so we'll
+                // need to give global permissions
+                $chmod = $chmod | 0777;
+            }
+            trigger_error(
+                'Directory ' . $dir . ' not writable, ' .
+                'please chmod to ' . decoct($chmod),
+                E_USER_WARNING
+            );
+        } else {
+            // generic error message
+            trigger_error(
+                'Directory ' . $dir . ' not writable, ' .
+                'please alter file permissions',
+                E_USER_WARNING
+            );
+        }
+        return false;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/DefinitionCache/Serializer/README b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer/README
similarity index 100%
rename from library/HTMLPurifier/DefinitionCache/Serializer/README
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer/README
diff --git a/library/HTMLPurifier/DefinitionCacheFactory.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCacheFactory.php
similarity index 67%
rename from library/HTMLPurifier/DefinitionCacheFactory.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCacheFactory.php
index a6ead62818..fd1cc9be46 100644
--- a/library/HTMLPurifier/DefinitionCacheFactory.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCacheFactory.php
@@ -5,22 +5,36 @@
  */
 class HTMLPurifier_DefinitionCacheFactory
 {
-
+    /**
+     * @type array
+     */
     protected $caches = array('Serializer' => array());
+
+    /**
+     * @type array
+     */
     protected $implementations = array();
+
+    /**
+     * @type HTMLPurifier_DefinitionCache_Decorator[]
+     */
     protected $decorators = array();
 
     /**
      * Initialize default decorators
      */
-    public function setup() {
+    public function setup()
+    {
         $this->addDecorator('Cleanup');
     }
 
     /**
      * Retrieves an instance of global definition cache factory.
+     * @param HTMLPurifier_DefinitionCacheFactory $prototype
+     * @return HTMLPurifier_DefinitionCacheFactory
      */
-    public static function instance($prototype = null) {
+    public static function instance($prototype = null)
+    {
         static $instance;
         if ($prototype !== null) {
             $instance = $prototype;
@@ -33,19 +47,22 @@ class HTMLPurifier_DefinitionCacheFactory
 
     /**
      * Registers a new definition cache object
-     * @param $short Short name of cache object, for reference
-     * @param $long Full class name of cache object, for construction
+     * @param string $short Short name of cache object, for reference
+     * @param string $long Full class name of cache object, for construction
      */
-    public function register($short, $long) {
+    public function register($short, $long)
+    {
         $this->implementations[$short] = $long;
     }
 
     /**
      * Factory method that creates a cache object based on configuration
-     * @param $name Name of definitions handled by cache
-     * @param $config Instance of HTMLPurifier_Config
+     * @param string $type Name of definitions handled by cache
+     * @param HTMLPurifier_Config $config Config instance
+     * @return mixed
      */
-    public function create($type, $config) {
+    public function create($type, $config)
+    {
         $method = $config->get('Cache.DefinitionImpl');
         if ($method === null) {
             return new HTMLPurifier_DefinitionCache_Null($type);
@@ -53,10 +70,8 @@ class HTMLPurifier_DefinitionCacheFactory
         if (!empty($this->caches[$method][$type])) {
             return $this->caches[$method][$type];
         }
-        if (
-          isset($this->implementations[$method]) &&
-          class_exists($class = $this->implementations[$method], false)
-        ) {
+        if (isset($this->implementations[$method]) &&
+            class_exists($class = $this->implementations[$method], false)) {
             $cache = new $class($type);
         } else {
             if ($method != 'Serializer') {
@@ -76,16 +91,16 @@ class HTMLPurifier_DefinitionCacheFactory
 
     /**
      * Registers a decorator to add to all new cache objects
-     * @param
+     * @param HTMLPurifier_DefinitionCache_Decorator|string $decorator An instance or the name of a decorator
      */
-    public function addDecorator($decorator) {
+    public function addDecorator($decorator)
+    {
         if (is_string($decorator)) {
             $class = "HTMLPurifier_DefinitionCache_Decorator_$decorator";
             $decorator = new $class;
         }
         $this->decorators[$decorator->name] = $decorator;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Doctype.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Doctype.php
similarity index 77%
rename from library/HTMLPurifier/Doctype.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Doctype.php
index 1e3c574c06..4acd06e5bd 100644
--- a/library/HTMLPurifier/Doctype.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Doctype.php
@@ -10,42 +10,55 @@ class HTMLPurifier_Doctype
 {
     /**
      * Full name of doctype
+     * @type string
      */
     public $name;
 
     /**
      * List of standard modules (string identifiers or literal objects)
      * that this doctype uses
+     * @type array
      */
     public $modules = array();
 
     /**
      * List of modules to use for tidying up code
+     * @type array
      */
     public $tidyModules = array();
 
     /**
      * Is the language derived from XML (i.e. XHTML)?
+     * @type bool
      */
     public $xml = true;
 
     /**
      * List of aliases for this doctype
+     * @type array
      */
     public $aliases = array();
 
     /**
      * Public DTD identifier
+     * @type string
      */
     public $dtdPublic;
 
     /**
      * System DTD identifier
+     * @type string
      */
     public $dtdSystem;
 
-    public function __construct($name = null, $xml = true, $modules = array(),
-        $tidyModules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
+    public function __construct(
+        $name = null,
+        $xml = true,
+        $modules = array(),
+        $tidyModules = array(),
+        $aliases = array(),
+        $dtd_public = null,
+        $dtd_system = null
     ) {
         $this->name         = $name;
         $this->xml          = $xml;
diff --git a/library/HTMLPurifier/DoctypeRegistry.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php
similarity index 51%
rename from library/HTMLPurifier/DoctypeRegistry.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php
index 86049e9391..acc1d64a62 100644
--- a/library/HTMLPurifier/DoctypeRegistry.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php
@@ -4,12 +4,14 @@ class HTMLPurifier_DoctypeRegistry
 {
 
     /**
-     * Hash of doctype names to doctype objects
+     * Hash of doctype names to doctype objects.
+     * @type array
      */
     protected $doctypes;
 
     /**
-     * Lookup table of aliases to real doctype names
+     * Lookup table of aliases to real doctype names.
+     * @type array
      */
     protected $aliases;
 
@@ -17,32 +19,57 @@ class HTMLPurifier_DoctypeRegistry
      * Registers a doctype to the registry
      * @note Accepts a fully-formed doctype object, or the
      *       parameters for constructing a doctype object
-     * @param $doctype Name of doctype or literal doctype object
-     * @param $modules Modules doctype will load
-     * @param $modules_for_modes Modules doctype will load for certain modes
-     * @param $aliases Alias names for doctype
-     * @return Editable registered doctype
+     * @param string $doctype Name of doctype or literal doctype object
+     * @param bool $xml
+     * @param array $modules Modules doctype will load
+     * @param array $tidy_modules Modules doctype will load for certain modes
+     * @param array $aliases Alias names for doctype
+     * @param string $dtd_public
+     * @param string $dtd_system
+     * @return HTMLPurifier_Doctype Editable registered doctype
      */
-    public function register($doctype, $xml = true, $modules = array(),
-        $tidy_modules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
+    public function register(
+        $doctype,
+        $xml = true,
+        $modules = array(),
+        $tidy_modules = array(),
+        $aliases = array(),
+        $dtd_public = null,
+        $dtd_system = null
     ) {
-        if (!is_array($modules)) $modules = array($modules);
-        if (!is_array($tidy_modules)) $tidy_modules = array($tidy_modules);
-        if (!is_array($aliases)) $aliases = array($aliases);
+        if (!is_array($modules)) {
+            $modules = array($modules);
+        }
+        if (!is_array($tidy_modules)) {
+            $tidy_modules = array($tidy_modules);
+        }
+        if (!is_array($aliases)) {
+            $aliases = array($aliases);
+        }
         if (!is_object($doctype)) {
             $doctype = new HTMLPurifier_Doctype(
-                $doctype, $xml, $modules, $tidy_modules, $aliases, $dtd_public, $dtd_system
+                $doctype,
+                $xml,
+                $modules,
+                $tidy_modules,
+                $aliases,
+                $dtd_public,
+                $dtd_system
             );
         }
         $this->doctypes[$doctype->name] = $doctype;
         $name = $doctype->name;
         // hookup aliases
         foreach ($doctype->aliases as $alias) {
-            if (isset($this->doctypes[$alias])) continue;
+            if (isset($this->doctypes[$alias])) {
+                continue;
+            }
             $this->aliases[$alias] = $name;
         }
         // remove old aliases
-        if (isset($this->aliases[$name])) unset($this->aliases[$name]);
+        if (isset($this->aliases[$name])) {
+            unset($this->aliases[$name]);
+        }
         return $doctype;
     }
 
@@ -50,11 +77,14 @@ class HTMLPurifier_DoctypeRegistry
      * Retrieves reference to a doctype of a certain name
      * @note This function resolves aliases
      * @note When possible, use the more fully-featured make()
-     * @param $doctype Name of doctype
-     * @return Editable doctype object
+     * @param string $doctype Name of doctype
+     * @return HTMLPurifier_Doctype Editable doctype object
      */
-    public function get($doctype) {
-        if (isset($this->aliases[$doctype])) $doctype = $this->aliases[$doctype];
+    public function get($doctype)
+    {
+        if (isset($this->aliases[$doctype])) {
+            $doctype = $this->aliases[$doctype];
+        }
         if (!isset($this->doctypes[$doctype])) {
             trigger_error('Doctype ' . htmlspecialchars($doctype) . ' does not exist', E_USER_ERROR);
             $anon = new HTMLPurifier_Doctype($doctype);
@@ -70,20 +100,30 @@ class HTMLPurifier_DoctypeRegistry
      *       can hold on to (this is necessary in order to tell
      *       Generator whether or not the current document is XML
      *       based or not).
+     * @param HTMLPurifier_Config $config
+     * @return HTMLPurifier_Doctype
      */
-    public function make($config) {
+    public function make($config)
+    {
         return clone $this->get($this->getDoctypeFromConfig($config));
     }
 
     /**
      * Retrieves the doctype from the configuration object
+     * @param HTMLPurifier_Config $config
+     * @return string
      */
-    public function getDoctypeFromConfig($config) {
+    public function getDoctypeFromConfig($config)
+    {
         // recommended test
         $doctype = $config->get('HTML.Doctype');
-        if (!empty($doctype)) return $doctype;
+        if (!empty($doctype)) {
+            return $doctype;
+        }
         $doctype = $config->get('HTML.CustomDoctype');
-        if (!empty($doctype)) return $doctype;
+        if (!empty($doctype)) {
+            return $doctype;
+        }
         // backwards-compatibility
         if ($config->get('HTML.XHTML')) {
             $doctype = 'XHTML 1.0';
@@ -97,7 +137,6 @@ class HTMLPurifier_DoctypeRegistry
         }
         return $doctype;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ElementDef.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ElementDef.php
similarity index 69%
rename from library/HTMLPurifier/ElementDef.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ElementDef.php
index 5498d95670..d5311cedcf 100644
--- a/library/HTMLPurifier/ElementDef.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ElementDef.php
@@ -10,15 +10,16 @@
  */
 class HTMLPurifier_ElementDef
 {
-
     /**
      * Does the definition work by itself, or is it created solely
      * for the purpose of merging into another definition?
+     * @type bool
      */
     public $standalone = true;
 
     /**
-     * Associative array of attribute name to HTMLPurifier_AttrDef
+     * Associative array of attribute name to HTMLPurifier_AttrDef.
+     * @type array
      * @note Before being processed by HTMLPurifier_AttrCollections
      *       when modules are finalized during
      *       HTMLPurifier_HTMLDefinition->setup(), this array may also
@@ -30,27 +31,43 @@ class HTMLPurifier_ElementDef
      */
     public $attr = array();
 
+    // XXX: Design note: currently, it's not possible to override
+    // previously defined AttrTransforms without messing around with
+    // the final generated config. This is by design; a previous version
+    // used an associated list of attr_transform, but it was extremely
+    // easy to accidentally override other attribute transforms by
+    // forgetting to specify an index (and just using 0.)  While we
+    // could check this by checking the index number and complaining,
+    // there is a second problem which is that it is not at all easy to
+    // tell when something is getting overridden. Combine this with a
+    // codebase where this isn't really being used, and it's perfect for
+    // nuking.
+
     /**
-     * Indexed list of tag's HTMLPurifier_AttrTransform to be done before validation
+     * List of tags HTMLPurifier_AttrTransform to be done before validation.
+     * @type array
      */
     public $attr_transform_pre = array();
 
     /**
-     * Indexed list of tag's HTMLPurifier_AttrTransform to be done after validation
+     * List of tags HTMLPurifier_AttrTransform to be done after validation.
+     * @type array
      */
     public $attr_transform_post = array();
 
     /**
      * HTMLPurifier_ChildDef of this tag.
+     * @type HTMLPurifier_ChildDef
      */
     public $child;
 
     /**
-     * Abstract string representation of internal ChildDef rules. See
-     * HTMLPurifier_ContentSets for how this is parsed and then transformed
+     * Abstract string representation of internal ChildDef rules.
+     * @see HTMLPurifier_ContentSets for how this is parsed and then transformed
      * into an HTMLPurifier_ChildDef.
      * @warning This is a temporary variable that is not available after
      *      being processed by HTMLDefinition
+     * @type string
      */
     public $content_model;
 
@@ -60,27 +77,29 @@ class HTMLPurifier_ElementDef
      * @warning This must be lowercase
      * @warning This is a temporary variable that is not available after
      *      being processed by HTMLDefinition
+     * @type string
      */
     public $content_model_type;
 
-
-
     /**
      * Does the element have a content model (#PCDATA | Inline)*? This
      * is important for chameleon ins and del processing in
      * HTMLPurifier_ChildDef_Chameleon. Dynamically set: modules don't
      * have to worry about this one.
+     * @type bool
      */
     public $descendants_are_inline = false;
 
     /**
-     * List of the names of required attributes this element has. Dynamically
-     * populated by HTMLPurifier_HTMLDefinition::getElement
+     * List of the names of required attributes this element has.
+     * Dynamically populated by HTMLPurifier_HTMLDefinition::getElement()
+     * @type array
      */
     public $required_attr = array();
 
     /**
      * Lookup table of tags excluded from all descendants of this tag.
+     * @type array
      * @note SGML permits exclusions for all descendants, but this is
      *       not possible with DTDs or XML Schemas. W3C has elected to
      *       use complicated compositions of content_models to simulate
@@ -94,6 +113,7 @@ class HTMLPurifier_ElementDef
 
     /**
      * This tag is explicitly auto-closed by the following tags.
+     * @type array
      */
     public $autoclose = array();
 
@@ -101,19 +121,22 @@ class HTMLPurifier_ElementDef
      * If a foreign element is found in this element, test if it is
      * allowed by this sub-element; if it is, instead of closing the
      * current element, place it inside this element.
+     * @type string
      */
     public $wrap;
 
     /**
      * Whether or not this is a formatting element affected by the
      * "Active Formatting Elements" algorithm.
+     * @type bool
      */
     public $formatting;
 
     /**
      * Low-level factory constructor for creating new standalone element defs
      */
-    public static function create($content_model, $content_model_type, $attr) {
+    public static function create($content_model, $content_model_type, $attr)
+    {
         $def = new HTMLPurifier_ElementDef();
         $def->content_model = $content_model;
         $def->content_model_type = $content_model_type;
@@ -125,11 +148,12 @@ class HTMLPurifier_ElementDef
      * Merges the values of another element definition into this one.
      * Values from the new element def take precedence if a value is
      * not mergeable.
+     * @param HTMLPurifier_ElementDef $def
      */
-    public function mergeIn($def) {
-
+    public function mergeIn($def)
+    {
         // later keys takes precedence
-        foreach($def->attr as $k => $v) {
+        foreach ($def->attr as $k => $v) {
             if ($k === 0) {
                 // merge in the includes
                 // sorry, no way to override an include
@@ -139,28 +163,35 @@ class HTMLPurifier_ElementDef
                 continue;
             }
             if ($v === false) {
-                if (isset($this->attr[$k])) unset($this->attr[$k]);
+                if (isset($this->attr[$k])) {
+                    unset($this->attr[$k]);
+                }
                 continue;
             }
             $this->attr[$k] = $v;
         }
-        $this->_mergeAssocArray($this->attr_transform_pre, $def->attr_transform_pre);
-        $this->_mergeAssocArray($this->attr_transform_post, $def->attr_transform_post);
         $this->_mergeAssocArray($this->excludes, $def->excludes);
+        $this->attr_transform_pre = array_merge($this->attr_transform_pre, $def->attr_transform_pre);
+        $this->attr_transform_post = array_merge($this->attr_transform_post, $def->attr_transform_post);
 
-        if(!empty($def->content_model)) {
+        if (!empty($def->content_model)) {
             $this->content_model =
                 str_replace("#SUPER", $this->content_model, $def->content_model);
             $this->child = false;
         }
-        if(!empty($def->content_model_type)) {
+        if (!empty($def->content_model_type)) {
             $this->content_model_type = $def->content_model_type;
             $this->child = false;
         }
-        if(!is_null($def->child)) $this->child = $def->child;
-        if(!is_null($def->formatting)) $this->formatting = $def->formatting;
-        if($def->descendants_are_inline) $this->descendants_are_inline = $def->descendants_are_inline;
-
+        if (!is_null($def->child)) {
+            $this->child = $def->child;
+        }
+        if (!is_null($def->formatting)) {
+            $this->formatting = $def->formatting;
+        }
+        if ($def->descendants_are_inline) {
+            $this->descendants_are_inline = $def->descendants_are_inline;
+        }
     }
 
     /**
@@ -168,16 +199,18 @@ class HTMLPurifier_ElementDef
      * @param $a1 Array by reference that is merged into
      * @param $a2 Array that merges into $a1
      */
-    private function _mergeAssocArray(&$a1, $a2) {
+    private function _mergeAssocArray(&$a1, $a2)
+    {
         foreach ($a2 as $k => $v) {
             if ($v === false) {
-                if (isset($a1[$k])) unset($a1[$k]);
+                if (isset($a1[$k])) {
+                    unset($a1[$k]);
+                }
                 continue;
             }
             $a1[$k] = $v;
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Encoder.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Encoder.php
similarity index 63%
rename from library/HTMLPurifier/Encoder.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Encoder.php
index 2b3140caaf..fef9b58906 100644
--- a/library/HTMLPurifier/Encoder.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Encoder.php
@@ -10,14 +10,90 @@ class HTMLPurifier_Encoder
     /**
      * Constructor throws fatal error if you attempt to instantiate class
      */
-    private function __construct() {
+    private function __construct()
+    {
         trigger_error('Cannot instantiate encoder, call methods statically', E_USER_ERROR);
     }
 
     /**
      * Error-handler that mutes errors, alternative to shut-up operator.
      */
-    public static function muteErrorHandler() {}
+    public static function muteErrorHandler()
+    {
+    }
+
+    /**
+     * iconv wrapper which mutes errors, but doesn't work around bugs.
+     * @param string $in Input encoding
+     * @param string $out Output encoding
+     * @param string $text The text to convert
+     * @return string
+     */
+    public static function unsafeIconv($in, $out, $text)
+    {
+        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
+        $r = iconv($in, $out, $text);
+        restore_error_handler();
+        return $r;
+    }
+
+    /**
+     * iconv wrapper which mutes errors and works around bugs.
+     * @param string $in Input encoding
+     * @param string $out Output encoding
+     * @param string $text The text to convert
+     * @param int $max_chunk_size
+     * @return string
+     */
+    public static function iconv($in, $out, $text, $max_chunk_size = 8000)
+    {
+        $code = self::testIconvTruncateBug();
+        if ($code == self::ICONV_OK) {
+            return self::unsafeIconv($in, $out, $text);
+        } elseif ($code == self::ICONV_TRUNCATES) {
+            // we can only work around this if the input character set
+            // is utf-8
+            if ($in == 'utf-8') {
+                if ($max_chunk_size < 4) {
+                    trigger_error('max_chunk_size is too small', E_USER_WARNING);
+                    return false;
+                }
+                // split into 8000 byte chunks, but be careful to handle
+                // multibyte boundaries properly
+                if (($c = strlen($text)) <= $max_chunk_size) {
+                    return self::unsafeIconv($in, $out, $text);
+                }
+                $r = '';
+                $i = 0;
+                while (true) {
+                    if ($i + $max_chunk_size >= $c) {
+                        $r .= self::unsafeIconv($in, $out, substr($text, $i));
+                        break;
+                    }
+                    // wibble the boundary
+                    if (0x80 != (0xC0 & ord($text[$i + $max_chunk_size]))) {
+                        $chunk_size = $max_chunk_size;
+                    } elseif (0x80 != (0xC0 & ord($text[$i + $max_chunk_size - 1]))) {
+                        $chunk_size = $max_chunk_size - 1;
+                    } elseif (0x80 != (0xC0 & ord($text[$i + $max_chunk_size - 2]))) {
+                        $chunk_size = $max_chunk_size - 2;
+                    } elseif (0x80 != (0xC0 & ord($text[$i + $max_chunk_size - 3]))) {
+                        $chunk_size = $max_chunk_size - 3;
+                    } else {
+                        return false; // rather confusing UTF-8...
+                    }
+                    $chunk = substr($text, $i, $chunk_size); // substr doesn't mind overlong lengths
+                    $r .= self::unsafeIconv($in, $out, $chunk);
+                    $i += $chunk_size;
+                }
+                return $r;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
 
     /**
      * Cleans a UTF-8 string for well-formedness and SGML validity
@@ -25,6 +101,10 @@ class HTMLPurifier_Encoder
      * It will parse according to UTF-8 and return a valid UTF8 string, with
      * non-SGML codepoints excluded.
      *
+     * @param string $str The string to clean
+     * @param bool $force_php
+     * @return string
+     *
      * @note Just for reference, the non-SGML code points are 0 to 31 and
      *       127 to 159, inclusive.  However, we allow code points 9, 10
      *       and 13, which are the tab, line feed and carriage return
@@ -44,14 +124,17 @@ class HTMLPurifier_Encoder
      *       would need that, and I'm probably not going to implement them.
      *       Once again, PHP 6 should solve all our problems.
      */
-    public static function cleanUTF8($str, $force_php = false) {
-
+    public static function cleanUTF8($str, $force_php = false)
+    {
         // UTF-8 validity is checked since PHP 4.3.5
         // This is an optimization: if the string is already valid UTF-8, no
         // need to do PHP stuff. 99% of the time, this will be the case.
         // The regexp matches the XML char production, as well as well as excluding
         // non-SGML codepoints U+007F to U+009F
-        if (preg_match('/^[\x{9}\x{A}\x{D}\x{20}-\x{7E}\x{A0}-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]*$/Du', $str)) {
+        if (preg_match(
+            '/^[\x{9}\x{A}\x{D}\x{20}-\x{7E}\x{A0}-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]*$/Du',
+            $str
+        )) {
             return $str;
         }
 
@@ -70,7 +153,7 @@ class HTMLPurifier_Encoder
         $char = '';
 
         $len = strlen($str);
-        for($i = 0; $i < $len; $i++) {
+        for ($i = 0; $i < $len; $i++) {
             $in = ord($str{$i});
             $char .= $str[$i]; // append byte to char
             if (0 == $mState) {
@@ -223,8 +306,9 @@ class HTMLPurifier_Encoder
     // | 00000000 | 00010000 | 11111111 | 11111111 | Defined upper limit of legal scalar codes
     // +----------+----------+----------+----------+
 
-    public static function unichr($code) {
-        if($code > 1114111 or $code < 0 or
+    public static function unichr($code)
+    {
+        if ($code > 1114111 or $code < 0 or
           ($code >= 55296 and $code <= 57343) ) {
             // bits are set outside the "valid" range as defined
             // by UNICODE 4.1.0
@@ -242,7 +326,7 @@ class HTMLPurifier_Encoder
                 $y = (($code & 2047) >> 6) | 192;
             } else {
                 $y = (($code & 4032) >> 6) | 128;
-                if($code < 65536) {
+                if ($code < 65536) {
                     $z = (($code >> 12) & 15) | 224;
                 } else {
                     $z = (($code >> 12) & 63) | 128;
@@ -252,84 +336,129 @@ class HTMLPurifier_Encoder
         }
         // set up the actual character
         $ret = '';
-        if($w) $ret .= chr($w);
-        if($z) $ret .= chr($z);
-        if($y) $ret .= chr($y);
+        if ($w) {
+            $ret .= chr($w);
+        }
+        if ($z) {
+            $ret .= chr($z);
+        }
+        if ($y) {
+            $ret .= chr($y);
+        }
         $ret .= chr($x);
 
         return $ret;
     }
 
     /**
-     * Converts a string to UTF-8 based on configuration.
+     * @return bool
      */
-    public static function convertToUTF8($str, $config, $context) {
-        $encoding = $config->get('Core.Encoding');
-        if ($encoding === 'utf-8') return $str;
+    public static function iconvAvailable()
+    {
         static $iconv = null;
-        if ($iconv === null) $iconv = function_exists('iconv');
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
+        if ($iconv === null) {
+            $iconv = function_exists('iconv') && self::testIconvTruncateBug() != self::ICONV_UNUSABLE;
+        }
+        return $iconv;
+    }
+
+    /**
+     * Convert a string to UTF-8 based on configuration.
+     * @param string $str The string to convert
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public static function convertToUTF8($str, $config, $context)
+    {
+        $encoding = $config->get('Core.Encoding');
+        if ($encoding === 'utf-8') {
+            return $str;
+        }
+        static $iconv = null;
+        if ($iconv === null) {
+            $iconv = self::iconvAvailable();
+        }
         if ($iconv && !$config->get('Test.ForceNoIconv')) {
-            $str = iconv($encoding, 'utf-8//IGNORE', $str);
+            // unaffected by bugs, since UTF-8 support all characters
+            $str = self::unsafeIconv($encoding, 'utf-8//IGNORE', $str);
             if ($str === false) {
                 // $encoding is not a valid encoding
-                restore_error_handler();
                 trigger_error('Invalid encoding ' . $encoding, E_USER_ERROR);
                 return '';
             }
             // If the string is bjorked by Shift_JIS or a similar encoding
             // that doesn't support all of ASCII, convert the naughty
             // characters to their true byte-wise ASCII/UTF-8 equivalents.
-            $str = strtr($str, HTMLPurifier_Encoder::testEncodingSupportsASCII($encoding));
-            restore_error_handler();
+            $str = strtr($str, self::testEncodingSupportsASCII($encoding));
             return $str;
         } elseif ($encoding === 'iso-8859-1') {
             $str = utf8_encode($str);
-            restore_error_handler();
             return $str;
         }
-        trigger_error('Encoding not supported, please install iconv', E_USER_ERROR);
+        $bug = HTMLPurifier_Encoder::testIconvTruncateBug();
+        if ($bug == self::ICONV_OK) {
+            trigger_error('Encoding not supported, please install iconv', E_USER_ERROR);
+        } else {
+            trigger_error(
+                'You have a buggy version of iconv, see https://bugs.php.net/bug.php?id=48147 ' .
+                'and http://sourceware.org/bugzilla/show_bug.cgi?id=13541',
+                E_USER_ERROR
+            );
+        }
     }
 
     /**
      * Converts a string from UTF-8 based on configuration.
+     * @param string $str The string to convert
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
      * @note Currently, this is a lossy conversion, with unexpressable
      *       characters being omitted.
      */
-    public static function convertFromUTF8($str, $config, $context) {
+    public static function convertFromUTF8($str, $config, $context)
+    {
         $encoding = $config->get('Core.Encoding');
-        if ($encoding === 'utf-8') return $str;
-        static $iconv = null;
-        if ($iconv === null) $iconv = function_exists('iconv');
         if ($escape = $config->get('Core.EscapeNonASCIICharacters')) {
-            $str = HTMLPurifier_Encoder::convertToASCIIDumbLossless($str);
+            $str = self::convertToASCIIDumbLossless($str);
+        }
+        if ($encoding === 'utf-8') {
+            return $str;
+        }
+        static $iconv = null;
+        if ($iconv === null) {
+            $iconv = self::iconvAvailable();
         }
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
         if ($iconv && !$config->get('Test.ForceNoIconv')) {
             // Undo our previous fix in convertToUTF8, otherwise iconv will barf
-            $ascii_fix = HTMLPurifier_Encoder::testEncodingSupportsASCII($encoding);
+            $ascii_fix = self::testEncodingSupportsASCII($encoding);
             if (!$escape && !empty($ascii_fix)) {
                 $clear_fix = array();
-                foreach ($ascii_fix as $utf8 => $native) $clear_fix[$utf8] = '';
+                foreach ($ascii_fix as $utf8 => $native) {
+                    $clear_fix[$utf8] = '';
+                }
                 $str = strtr($str, $clear_fix);
             }
             $str = strtr($str, array_flip($ascii_fix));
             // Normal stuff
-            $str = iconv('utf-8', $encoding . '//IGNORE', $str);
-            restore_error_handler();
+            $str = self::iconv('utf-8', $encoding . '//IGNORE', $str);
             return $str;
         } elseif ($encoding === 'iso-8859-1') {
             $str = utf8_decode($str);
-            restore_error_handler();
             return $str;
         }
         trigger_error('Encoding not supported', E_USER_ERROR);
+        // You might be tempted to assume that the ASCII representation
+        // might be OK, however, this is *not* universally true over all
+        // encodings.  So we take the conservative route here, rather
+        // than forcibly turn on %Core.EscapeNonASCIICharacters
     }
 
     /**
      * Lossless (character-wise) conversion of HTML to ASCII
-     * @param $str UTF-8 string to be converted to ASCII
-     * @returns ASCII encoded string with non-ASCII character entity-ized
+     * @param string $str UTF-8 string to be converted to ASCII
+     * @return string ASCII encoded string with non-ASCII character entity-ized
      * @warning Adapted from MediaWiki, claiming fair use: this is a common
      *       algorithm. If you disagree with this license fudgery,
      *       implement it yourself.
@@ -342,27 +471,28 @@ class HTMLPurifier_Encoder
      * @note Sort of with cleanUTF8() but it assumes that $str is
      *       well-formed UTF-8
      */
-    public static function convertToASCIIDumbLossless($str) {
+    public static function convertToASCIIDumbLossless($str)
+    {
         $bytesleft = 0;
         $result = '';
         $working = 0;
         $len = strlen($str);
-        for( $i = 0; $i < $len; $i++ ) {
-            $bytevalue = ord( $str[$i] );
-            if( $bytevalue <= 0x7F ) { //0xxx xxxx
-                $result .= chr( $bytevalue );
+        for ($i = 0; $i < $len; $i++) {
+            $bytevalue = ord($str[$i]);
+            if ($bytevalue <= 0x7F) { //0xxx xxxx
+                $result .= chr($bytevalue);
                 $bytesleft = 0;
-            } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
+            } elseif ($bytevalue <= 0xBF) { //10xx xxxx
                 $working = $working << 6;
                 $working += ($bytevalue & 0x3F);
                 $bytesleft--;
-                if( $bytesleft <= 0 ) {
+                if ($bytesleft <= 0) {
                     $result .= "&#" . $working . ";";
                 }
-            } elseif( $bytevalue <= 0xDF ) { //110x xxxx
+            } elseif ($bytevalue <= 0xDF) { //110x xxxx
                 $working = $bytevalue & 0x1F;
                 $bytesleft = 1;
-            } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
+            } elseif ($bytevalue <= 0xEF) { //1110 xxxx
                 $working = $bytevalue & 0x0F;
                 $bytesleft = 2;
             } else { //1111 0xxx
@@ -373,6 +503,54 @@ class HTMLPurifier_Encoder
         return $result;
     }
 
+    /** No bugs detected in iconv. */
+    const ICONV_OK = 0;
+
+    /** Iconv truncates output if converting from UTF-8 to another
+     *  character set with //IGNORE, and a non-encodable character is found */
+    const ICONV_TRUNCATES = 1;
+
+    /** Iconv does not support //IGNORE, making it unusable for
+     *  transcoding purposes */
+    const ICONV_UNUSABLE = 2;
+
+    /**
+     * glibc iconv has a known bug where it doesn't handle the magic
+     * //IGNORE stanza correctly.  In particular, rather than ignore
+     * characters, it will return an EILSEQ after consuming some number
+     * of characters, and expect you to restart iconv as if it were
+     * an E2BIG.  Old versions of PHP did not respect the errno, and
+     * returned the fragment, so as a result you would see iconv
+     * mysteriously truncating output. We can work around this by
+     * manually chopping our input into segments of about 8000
+     * characters, as long as PHP ignores the error code.  If PHP starts
+     * paying attention to the error code, iconv becomes unusable.
+     *
+     * @return int Error code indicating severity of bug.
+     */
+    public static function testIconvTruncateBug()
+    {
+        static $code = null;
+        if ($code === null) {
+            // better not use iconv, otherwise infinite loop!
+            $r = self::unsafeIconv('utf-8', 'ascii//IGNORE', "\xCE\xB1" . str_repeat('a', 9000));
+            if ($r === false) {
+                $code = self::ICONV_UNUSABLE;
+            } elseif (($c = strlen($r)) < 9000) {
+                $code = self::ICONV_TRUNCATES;
+            } elseif ($c > 9000) {
+                trigger_error(
+                    'Your copy of iconv is extremely buggy. Please notify HTML Purifier maintainers: ' .
+                    'include your iconv version as per phpversion()',
+                    E_USER_ERROR
+                );
+            } else {
+                $code = self::ICONV_OK;
+            }
+        }
+        return $code;
+    }
+
     /**
      * This expensive function tests whether or not a given character
      * encoding supports ASCII. 7/8-bit encodings like Shift_JIS will
@@ -384,10 +562,18 @@ class HTMLPurifier_Encoder
      * @return Array of UTF-8 characters to their corresponding ASCII,
      *      which can be used to "undo" any overzealous iconv action.
      */
-    public static function testEncodingSupportsASCII($encoding, $bypass = false) {
+    public static function testEncodingSupportsASCII($encoding, $bypass = false)
+    {
+        // All calls to iconv here are unsafe, proof by case analysis:
+        // If ICONV_OK, no difference.
+        // If ICONV_TRUNCATE, all calls involve one character inputs,
+        // so bug is not triggered.
+        // If ICONV_UNUSABLE, this call is irrelevant
         static $encodings = array();
         if (!$bypass) {
-            if (isset($encodings[$encoding])) return $encodings[$encoding];
+            if (isset($encodings[$encoding])) {
+                return $encodings[$encoding];
+            }
             $lenc = strtolower($encoding);
             switch ($lenc) {
                 case 'shift_jis':
@@ -395,32 +581,31 @@ class HTMLPurifier_Encoder
                 case 'johab':
                     return array("\xE2\x82\xA9" => '\\');
             }
-            if (strpos($lenc, 'iso-8859-') === 0) return array();
+            if (strpos($lenc, 'iso-8859-') === 0) {
+                return array();
+            }
         }
         $ret = array();
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
-        if (iconv('UTF-8', $encoding, 'a') === false) return false;
+        if (self::unsafeIconv('UTF-8', $encoding, 'a') === false) {
+            return false;
+        }
         for ($i = 0x20; $i <= 0x7E; $i++) { // all printable ASCII chars
             $c = chr($i); // UTF-8 char
-            $r = iconv('UTF-8', "$encoding//IGNORE", $c); // initial conversion
-            if (
-                $r === '' ||
+            $r = self::unsafeIconv('UTF-8', "$encoding//IGNORE", $c); // initial conversion
+            if ($r === '' ||
                 // This line is needed for iconv implementations that do not
                 // omit characters that do not exist in the target character set
-                ($r === $c && iconv($encoding, 'UTF-8//IGNORE', $r) !== $c)
+                ($r === $c && self::unsafeIconv($encoding, 'UTF-8//IGNORE', $r) !== $c)
             ) {
                 // Reverse engineer: what's the UTF-8 equiv of this byte
                 // sequence? This assumes that there's no variable width
                 // encoding that doesn't support ASCII.
-                $ret[iconv($encoding, 'UTF-8//IGNORE', $c)] = $c;
+                $ret[self::unsafeIconv($encoding, 'UTF-8//IGNORE', $c)] = $c;
             }
         }
-        restore_error_handler();
         $encodings[$encoding] = $ret;
         return $ret;
     }
-
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/EntityLookup.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup.php
similarity index 75%
rename from library/HTMLPurifier/EntityLookup.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup.php
index b4dfce94c3..f12ff13a35 100644
--- a/library/HTMLPurifier/EntityLookup.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup.php
@@ -3,20 +3,23 @@
 /**
  * Object that provides entity lookup table from entity name to character
  */
-class HTMLPurifier_EntityLookup {
-
+class HTMLPurifier_EntityLookup
+{
     /**
      * Assoc array of entity name to character represented.
+     * @type array
      */
     public $table;
 
     /**
      * Sets up the entity lookup table from the serialized file contents.
+     * @param bool $file
      * @note The serialized contents are versioned, but were generated
      *       using the maintenance script generate_entity_file.php
      * @warning This is not in constructor to help enforce the Singleton
      */
-    public function setup($file = false) {
+    public function setup($file = false)
+    {
         if (!$file) {
             $file = HTMLPURIFIER_PREFIX . '/HTMLPurifier/EntityLookup/entities.ser';
         }
@@ -25,9 +28,11 @@ class HTMLPurifier_EntityLookup {
 
     /**
      * Retrieves sole instance of the object.
-     * @param Optional prototype of custom lookup table to overload with.
+     * @param bool|HTMLPurifier_EntityLookup $prototype Optional prototype of custom lookup table to overload with.
+     * @return HTMLPurifier_EntityLookup
      */
-    public static function instance($prototype = false) {
+    public static function instance($prototype = false)
+    {
         // no references, since PHP doesn't copy unless modified
         static $instance = null;
         if ($prototype) {
@@ -38,7 +43,6 @@ class HTMLPurifier_EntityLookup {
         }
         return $instance;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup/entities.ser b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup/entities.ser
new file mode 100644
index 0000000000..e8b08128be
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityLookup/entities.ser
@@ -0,0 +1 @@
+a:253:{s:4:"fnof";s:2:"ƒ";s:5:"Alpha";s:2:"Α";s:4:"Beta";s:2:"Β";s:5:"Gamma";s:2:"Γ";s:5:"Delta";s:2:"Δ";s:7:"Epsilon";s:2:"Ε";s:4:"Zeta";s:2:"Ζ";s:3:"Eta";s:2:"Η";s:5:"Theta";s:2:"Θ";s:4:"Iota";s:2:"Ι";s:5:"Kappa";s:2:"Κ";s:6:"Lambda";s:2:"Λ";s:2:"Mu";s:2:"Μ";s:2:"Nu";s:2:"Ν";s:2:"Xi";s:2:"Ξ";s:7:"Omicron";s:2:"Ο";s:2:"Pi";s:2:"Π";s:3:"Rho";s:2:"Ρ";s:5:"Sigma";s:2:"Σ";s:3:"Tau";s:2:"Τ";s:7:"Upsilon";s:2:"Υ";s:3:"Phi";s:2:"Φ";s:3:"Chi";s:2:"Χ";s:3:"Psi";s:2:"Ψ";s:5:"Omega";s:2:"Ω";s:5:"alpha";s:2:"α";s:4:"beta";s:2:"β";s:5:"gamma";s:2:"γ";s:5:"delta";s:2:"δ";s:7:"epsilon";s:2:"ε";s:4:"zeta";s:2:"ζ";s:3:"eta";s:2:"η";s:5:"theta";s:2:"θ";s:4:"iota";s:2:"ι";s:5:"kappa";s:2:"κ";s:6:"lambda";s:2:"λ";s:2:"mu";s:2:"μ";s:2:"nu";s:2:"ν";s:2:"xi";s:2:"ξ";s:7:"omicron";s:2:"ο";s:2:"pi";s:2:"π";s:3:"rho";s:2:"ρ";s:6:"sigmaf";s:2:"ς";s:5:"sigma";s:2:"σ";s:3:"tau";s:2:"τ";s:7:"upsilon";s:2:"υ";s:3:"phi";s:2:"φ";s:3:"chi";s:2:"χ";s:3:"psi";s:2:"ψ";s:5:"omega";s:2:"ω";s:8:"thetasym";s:2:"ϑ";s:5:"upsih";s:2:"ϒ";s:3:"piv";s:2:"ϖ";s:4:"bull";s:3:"•";s:6:"hellip";s:3:"…";s:5:"prime";s:3:"′";s:5:"Prime";s:3:"″";s:5:"oline";s:3:"‾";s:5:"frasl";s:3:"⁄";s:6:"weierp";s:3:"℘";s:5:"image";s:3:"ℑ";s:4:"real";s:3:"ℜ";s:5:"trade";s:3:"™";s:7:"alefsym";s:3:"ℵ";s:4:"larr";s:3:"←";s:4:"uarr";s:3:"↑";s:4:"rarr";s:3:"→";s:4:"darr";s:3:"↓";s:4:"harr";s:3:"↔";s:5:"crarr";s:3:"↵";s:4:"lArr";s:3:"⇐";s:4:"uArr";s:3:"⇑";s:4:"rArr";s:3:"⇒";s:4:"dArr";s:3:"⇓";s:4:"hArr";s:3:"⇔";s:6:"forall";s:3:"∀";s:4:"part";s:3:"∂";s:5:"exist";s:3:"∃";s:5:"empty";s:3:"∅";s:5:"nabla";s:3:"∇";s:4:"isin";s:3:"∈";s:5:"notin";s:3:"∉";s:2:"ni";s:3:"∋";s:4:"prod";s:3:"∏";s:3:"sum";s:3:"∑";s:5:"minus";s:3:"−";s:6:"lowast";s:3:"∗";s:5:"radic";s:3:"√";s:4:"prop";s:3:"∝";s:5:"infin";s:3:"∞";s:3:"ang";s:3:"∠";s:3:"and";s:3:"∧";s:2:"or";s:3:"∨";s:3:"cap";s:3:"∩";s:3:"cup";s:3:"∪";s:3:"int";s:3:"∫";s:6:"there4";s:3:"∴";s:3:"sim";s:3:"∼";s:4:"cong";s:3:"≅";s:5:"asymp";s:3:"≈";s:2:"ne";s:3:"≠";s:5:"equiv";s:3:"≡";s:2:"le";s:3:"≤";s:2:"ge";s:3:"≥";s:3:"sub";s:3:"⊂";s:3:"sup";s:3:"⊃";s:4:"nsub";s:3:"⊄";s:4:"sube";s:3:"⊆";s:4:"supe";s:3:"⊇";s:5:"oplus";s:3:"⊕";s:6:"otimes";s:3:"⊗";s:4:"perp";s:3:"⊥";s:4:"sdot";s:3:"⋅";s:5:"lceil";s:3:"⌈";s:5:"rceil";s:3:"⌉";s:6:"lfloor";s:3:"⌊";s:6:"rfloor";s:3:"⌋";s:4:"lang";s:3:"〈";s:4:"rang";s:3:"〉";s:3:"loz";s:3:"◊";s:6:"spades";s:3:"♠";s:5:"clubs";s:3:"♣";s:6:"hearts";s:3:"♥";s:5:"diams";s:3:"♦";s:4:"quot";s:1:""";s:3:"amp";s:1:"&";s:2:"lt";s:1:"<";s:2:"gt";s:1:">";s:4:"apos";s:1:"'";s:5:"OElig";s:2:"Œ";s:5:"oelig";s:2:"œ";s:6:"Scaron";s:2:"Š";s:6:"scaron";s:2:"š";s:4:"Yuml";s:2:"Ÿ";s:4:"circ";s:2:"ˆ";s:5:"tilde";s:2:"˜";s:4:"ensp";s:3:" ";s:4:"emsp";s:3:" ";s:6:"thinsp";s:3:" ";s:4:"zwnj";s:3:"‌";s:3:"zwj";s:3:"‍";s:3:"lrm";s:3:"‎";s:3:"rlm";s:3:"‏";s:5:"ndash";s:3:"–";s:5:"mdash";s:3:"—";s:5:"lsquo";s:3:"‘";s:5:"rsquo";s:3:"’";s:5:"sbquo";s:3:"‚";s:5:"ldquo";s:3:"“";s:5:"rdquo";s:3:"”";s:5:"bdquo";s:3:"„";s:6:"dagger";s:3:"†";s:6:"Dagger";s:3:"‡";s:6:"permil";s:3:"‰";s:6:"lsaquo";s:3:"‹";s:6:"rsaquo";s:3:"›";s:4:"euro";s:3:"€";s:4:"nbsp";s:2:" ";s:5:"iexcl";s:2:"¡";s:4:"cent";s:2:"¢";s:5:"pound";s:2:"£";s:6:"curren";s:2:"¤";s:3:"yen";s:2:"¥";s:6:"brvbar";s:2:"¦";s:4:"sect";s:2:"§";s:3:"uml";s:2:"¨";s:4:"copy";s:2:"©";s:4:"ordf";s:2:"ª";s:5:"laquo";s:2:"«";s:3:"not";s:2:"¬";s:3:"shy";s:2:"­";s:3:"reg";s:2:"®";s:4:"macr";s:2:"¯";s:3:"deg";s:2:"°";s:6:"plusmn";s:2:"±";s:4:"sup2";s:2:"²";s:4:"sup3";s:2:"³";s:5:"acute";s:2:"´";s:5:"micro";s:2:"µ";s:4:"para";s:2:"¶";s:6:"middot";s:2:"·";s:5:"cedil";s:2:"¸";s:4:"sup1";s:2:"¹";s:4:"ordm";s:2:"º";s:5:"raquo";s:2:"»";s:6:"frac14";s:2:"¼";s:6:"frac12";s:2:"½";s:6:"frac34";s:2:"¾";s:6:"iquest";s:2:"¿";s:6:"Agrave";s:2:"À";s:6:"Aacute";s:2:"Á";s:5:"Acirc";s:2:"Â";s:6:"Atilde";s:2:"Ã";s:4:"Auml";s:2:"Ä";s:5:"Aring";s:2:"Å";s:5:"AElig";s:2:"Æ";s:6:"Ccedil";s:2:"Ç";s:6:"Egrave";s:2:"È";s:6:"Eacute";s:2:"É";s:5:"Ecirc";s:2:"Ê";s:4:"Euml";s:2:"Ë";s:6:"Igrave";s:2:"Ì";s:6:"Iacute";s:2:"Í";s:5:"Icirc";s:2:"Î";s:4:"Iuml";s:2:"Ï";s:3:"ETH";s:2:"Ð";s:6:"Ntilde";s:2:"Ñ";s:6:"Ograve";s:2:"Ò";s:6:"Oacute";s:2:"Ó";s:5:"Ocirc";s:2:"Ô";s:6:"Otilde";s:2:"Õ";s:4:"Ouml";s:2:"Ö";s:5:"times";s:2:"×";s:6:"Oslash";s:2:"Ø";s:6:"Ugrave";s:2:"Ù";s:6:"Uacute";s:2:"Ú";s:5:"Ucirc";s:2:"Û";s:4:"Uuml";s:2:"Ü";s:6:"Yacute";s:2:"Ý";s:5:"THORN";s:2:"Þ";s:5:"szlig";s:2:"ß";s:6:"agrave";s:2:"à";s:6:"aacute";s:2:"á";s:5:"acirc";s:2:"â";s:6:"atilde";s:2:"ã";s:4:"auml";s:2:"ä";s:5:"aring";s:2:"å";s:5:"aelig";s:2:"æ";s:6:"ccedil";s:2:"ç";s:6:"egrave";s:2:"è";s:6:"eacute";s:2:"é";s:5:"ecirc";s:2:"ê";s:4:"euml";s:2:"ë";s:6:"igrave";s:2:"ì";s:6:"iacute";s:2:"í";s:5:"icirc";s:2:"î";s:4:"iuml";s:2:"ï";s:3:"eth";s:2:"ð";s:6:"ntilde";s:2:"ñ";s:6:"ograve";s:2:"ò";s:6:"oacute";s:2:"ó";s:5:"ocirc";s:2:"ô";s:6:"otilde";s:2:"õ";s:4:"ouml";s:2:"ö";s:6:"divide";s:2:"÷";s:6:"oslash";s:2:"ø";s:6:"ugrave";s:2:"ù";s:6:"uacute";s:2:"ú";s:5:"ucirc";s:2:"û";s:4:"uuml";s:2:"ü";s:6:"yacute";s:2:"ý";s:5:"thorn";s:2:"þ";s:4:"yuml";s:2:"ÿ";}
\ No newline at end of file
diff --git a/library/HTMLPurifier/EntityParser.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityParser.php
similarity index 75%
rename from library/HTMLPurifier/EntityParser.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/EntityParser.php
index 8c384472dc..61529dcd9d 100644
--- a/library/HTMLPurifier/EntityParser.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/EntityParser.php
@@ -12,19 +12,21 @@ class HTMLPurifier_EntityParser
 
     /**
      * Reference to entity lookup table.
+     * @type HTMLPurifier_EntityLookup
      */
     protected $_entity_lookup;
 
     /**
      * Callback regex string for parsing entities.
+     * @type string
      */
     protected $_substituteEntitiesRegex =
-'/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/';
-//     1. hex             2. dec      3. string (XML style)
-
+        '/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/';
+        //     1. hex             2. dec      3. string (XML style)
 
     /**
      * Decimal to parsed string conversion table for special entities.
+     * @type array
      */
     protected $_special_dec2str =
             array(
@@ -37,6 +39,7 @@ class HTMLPurifier_EntityParser
 
     /**
      * Stripped entity names to decimal conversion table for special entities.
+     * @type array
      */
     protected $_special_ent2dec =
             array(
@@ -51,41 +54,45 @@ class HTMLPurifier_EntityParser
      * running this whenever you have parsed character is t3h 5uck, we run
      * it before everything else.
      *
-     * @param $string String to have non-special entities parsed.
-     * @returns Parsed string.
+     * @param string $string String to have non-special entities parsed.
+     * @return string Parsed string.
      */
-    public function substituteNonSpecialEntities($string) {
+    public function substituteNonSpecialEntities($string)
+    {
         // it will try to detect missing semicolons, but don't rely on it
         return preg_replace_callback(
             $this->_substituteEntitiesRegex,
             array($this, 'nonSpecialEntityCallback'),
             $string
-            );
+        );
     }
 
     /**
      * Callback function for substituteNonSpecialEntities() that does the work.
      *
-     * @param $matches  PCRE matches array, with 0 the entire match, and
+     * @param array $matches  PCRE matches array, with 0 the entire match, and
      *                  either index 1, 2 or 3 set with a hex value, dec value,
      *                  or string (respectively).
-     * @returns Replacement string.
+     * @return string Replacement string.
      */
 
-    protected function nonSpecialEntityCallback($matches) {
+    protected function nonSpecialEntityCallback($matches)
+    {
         // replaces all but big five
         $entity = $matches[0];
         $is_num = (@$matches[0][1] === '#');
         if ($is_num) {
             $is_hex = (@$entity[2] === 'x');
             $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
-
             // abort for special characters
-            if (isset($this->_special_dec2str[$code]))  return $entity;
-
+            if (isset($this->_special_dec2str[$code])) {
+                return $entity;
+            }
             return HTMLPurifier_Encoder::unichr($code);
         } else {
-            if (isset($this->_special_ent2dec[$matches[3]])) return $entity;
+            if (isset($this->_special_ent2dec[$matches[3]])) {
+                return $entity;
+            }
             if (!$this->_entity_lookup) {
                 $this->_entity_lookup = HTMLPurifier_EntityLookup::instance();
             }
@@ -103,14 +110,16 @@ class HTMLPurifier_EntityParser
      * @notice We try to avoid calling this function because otherwise, it
      * would have to be called a lot (for every parsed section).
      *
-     * @param $string String to have non-special entities parsed.
-     * @returns Parsed string.
+     * @param string $string String to have non-special entities parsed.
+     * @return string Parsed string.
      */
-    public function substituteSpecialEntities($string) {
+    public function substituteSpecialEntities($string)
+    {
         return preg_replace_callback(
             $this->_substituteEntitiesRegex,
             array($this, 'specialEntityCallback'),
-            $string);
+            $string
+        );
     }
 
     /**
@@ -118,12 +127,13 @@ class HTMLPurifier_EntityParser
      *
      * This callback has same syntax as nonSpecialEntityCallback().
      *
-     * @param $matches  PCRE-style matches array, with 0 the entire match, and
+     * @param array $matches  PCRE-style matches array, with 0 the entire match, and
      *                  either index 1, 2 or 3 set with a hex value, dec value,
      *                  or string (respectively).
-     * @returns Replacement string.
+     * @return string Replacement string.
      */
-    protected function specialEntityCallback($matches) {
+    protected function specialEntityCallback($matches)
+    {
         $entity = $matches[0];
         $is_num = (@$matches[0][1] === '#');
         if ($is_num) {
@@ -138,7 +148,6 @@ class HTMLPurifier_EntityParser
                 $entity;
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ErrorCollector.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorCollector.php
similarity index 82%
rename from library/HTMLPurifier/ErrorCollector.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorCollector.php
index 6713eaf773..d47e3f2e24 100644
--- a/library/HTMLPurifier/ErrorCollector.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorCollector.php
@@ -16,16 +16,46 @@ class HTMLPurifier_ErrorCollector
     const MESSAGE  = 2;
     const CHILDREN = 3;
 
+    /**
+     * @type array
+     */
     protected $errors;
+
+    /**
+     * @type array
+     */
     protected $_current;
+
+    /**
+     * @type array
+     */
     protected $_stacks = array(array());
+
+    /**
+     * @type HTMLPurifier_Language
+     */
     protected $locale;
+
+    /**
+     * @type HTMLPurifier_Generator
+     */
     protected $generator;
+
+    /**
+     * @type HTMLPurifier_Context
+     */
     protected $context;
 
+    /**
+     * @type array
+     */
     protected $lines = array();
 
-    public function __construct($context) {
+    /**
+     * @param HTMLPurifier_Context $context
+     */
+    public function __construct($context)
+    {
         $this->locale    =& $context->get('Locale');
         $this->context   = $context;
         $this->_current  =& $this->_stacks[0];
@@ -34,13 +64,11 @@ class HTMLPurifier_ErrorCollector
 
     /**
      * Sends an error message to the collector for later use
-     * @param $severity int Error severity, PHP error style (don't use E_USER_)
-     * @param $msg string Error message text
-     * @param $subst1 string First substitution for $msg
-     * @param $subst2 string ...
+     * @param int $severity Error severity, PHP error style (don't use E_USER_)
+     * @param string $msg Error message text
      */
-    public function send($severity, $msg) {
-
+    public function send($severity, $msg)
+    {
         $args = array();
         if (func_num_args() > 2) {
             $args = func_get_args();
@@ -50,7 +78,7 @@ class HTMLPurifier_ErrorCollector
 
         $token = $this->context->get('CurrentToken', true);
         $line  = $token ? $token->line : $this->context->get('CurrentLine', true);
-        $col   = $token ? $token->col  : $this->context->get('CurrentCol',  true);
+        $col   = $token ? $token->col  : $this->context->get('CurrentCol', true);
         $attr  = $this->context->get('CurrentAttr', true);
 
         // perform special substitutions, also add custom parameters
@@ -60,7 +88,9 @@ class HTMLPurifier_ErrorCollector
         }
         if (!is_null($attr)) {
             $subst['$CurrentAttr.Name'] = $attr;
-            if (isset($token->attr[$attr])) $subst['$CurrentAttr.Value'] = $token->attr[$attr];
+            if (isset($token->attr[$attr])) {
+                $subst['$CurrentAttr.Value'] = $token->attr[$attr];
+            }
         }
 
         if (empty($args)) {
@@ -69,7 +99,9 @@ class HTMLPurifier_ErrorCollector
             $msg = $this->locale->formatMessage($msg, $args);
         }
 
-        if (!empty($subst)) $msg = strtr($msg, $subst);
+        if (!empty($subst)) {
+            $msg = strtr($msg, $subst);
+        }
 
         // (numerically indexed)
         $error = array(
@@ -80,16 +112,15 @@ class HTMLPurifier_ErrorCollector
         );
         $this->_current[] = $error;
 
-
         // NEW CODE BELOW ...
-
-        $struct = null;
         // Top-level errors are either:
         //  TOKEN type, if $value is set appropriately, or
         //  "syntax" type, if $value is null
         $new_struct = new HTMLPurifier_ErrorStruct();
         $new_struct->type = HTMLPurifier_ErrorStruct::TOKEN;
-        if ($token) $new_struct->value = clone $token;
+        if ($token) {
+            $new_struct->value = clone $token;
+        }
         if (is_int($line) && is_int($col)) {
             if (isset($this->lines[$line][$col])) {
                 $struct = $this->lines[$line][$col];
@@ -128,30 +159,34 @@ class HTMLPurifier_ErrorCollector
 
     /**
      * Retrieves raw error data for custom formatter to use
-     * @param List of arrays in format of array(line of error,
-     *        error severity, error message,
-     *        recursive sub-errors array)
      */
-    public function getRaw() {
+    public function getRaw()
+    {
         return $this->errors;
     }
 
     /**
      * Default HTML formatting implementation for error messages
-     * @param $config Configuration array, vital for HTML output nature
-     * @param $errors Errors array to display; used for recursion.
+     * @param HTMLPurifier_Config $config Configuration, vital for HTML output nature
+     * @param array $errors Errors array to display; used for recursion.
+     * @return string
      */
-    public function getHTMLFormatted($config, $errors = null) {
+    public function getHTMLFormatted($config, $errors = null)
+    {
         $ret = array();
 
         $this->generator = new HTMLPurifier_Generator($config, $this->context);
-        if ($errors === null) $errors = $this->errors;
+        if ($errors === null) {
+            $errors = $this->errors;
+        }
 
         // 'At line' message needs to be removed
 
         // generation code for new structure goes here. It needs to be recursive.
         foreach ($this->lines as $line => $col_array) {
-            if ($line == -1) continue;
+            if ($line == -1) {
+                continue;
+            }
             foreach ($col_array as $col => $struct) {
                 $this->_renderStruct($ret, $struct, $line, $col);
             }
@@ -168,7 +203,8 @@ class HTMLPurifier_ErrorCollector
 
     }
 
-    private function _renderStruct(&$ret, $struct, $line = null, $col = null) {
+    private function _renderStruct(&$ret, $struct, $line = null, $col = null)
+    {
         $stack = array($struct);
         $context_stack = array(array());
         while ($current = array_pop($stack)) {
@@ -194,7 +230,7 @@ class HTMLPurifier_ErrorCollector
                 //$string .= '</pre>';
                 $ret[] = $string;
             }
-            foreach ($current->children as $type => $array) {
+            foreach ($current->children as $array) {
                 $context[] = $current;
                 $stack = array_merge($stack, array_reverse($array, true));
                 for ($i = count($array); $i > 0; $i--) {
@@ -203,7 +239,6 @@ class HTMLPurifier_ErrorCollector
             }
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/ErrorStruct.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorStruct.php
similarity index 81%
rename from library/HTMLPurifier/ErrorStruct.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorStruct.php
index 9bc8996ec1..cf869d3212 100644
--- a/library/HTMLPurifier/ErrorStruct.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/ErrorStruct.php
@@ -19,6 +19,7 @@ class HTMLPurifier_ErrorStruct
 
     /**
      * Type of this struct.
+     * @type string
      */
     public $type;
 
@@ -28,11 +29,13 @@ class HTMLPurifier_ErrorStruct
      *  - TOKEN: Instance of HTMLPurifier_Token
      *  - ATTR: array('attr-name', 'value')
      *  - CSSPROP: array('prop-name', 'value')
+     * @type mixed
      */
     public $value;
 
     /**
      * Errors registered for this structure.
+     * @type array
      */
     public $errors = array();
 
@@ -40,10 +43,17 @@ class HTMLPurifier_ErrorStruct
      * Child ErrorStructs that are from this structure. For example, a TOKEN
      * ErrorStruct would contain ATTR ErrorStructs. This is a multi-dimensional
      * array in structure: [TYPE]['identifier']
+     * @type array
      */
     public $children = array();
 
-    public function getChild($type, $id) {
+    /**
+     * @param string $type
+     * @param string $id
+     * @return mixed
+     */
+    public function getChild($type, $id)
+    {
         if (!isset($this->children[$type][$id])) {
             $this->children[$type][$id] = new HTMLPurifier_ErrorStruct();
             $this->children[$type][$id]->type = $type;
@@ -51,10 +61,14 @@ class HTMLPurifier_ErrorStruct
         return $this->children[$type][$id];
     }
 
-    public function addError($severity, $message) {
+    /**
+     * @param int $severity
+     * @param string $message
+     */
+    public function addError($severity, $message)
+    {
         $this->errors[] = array($severity, $message);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Exception.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Exception.php
similarity index 100%
rename from library/HTMLPurifier/Exception.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Exception.php
diff --git a/library/HTMLPurifier/Filter.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter.php
similarity index 71%
rename from library/HTMLPurifier/Filter.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Filter.php
index 9a0e7b09f3..c1f41ee162 100644
--- a/library/HTMLPurifier/Filter.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter.php
@@ -23,24 +23,34 @@ class HTMLPurifier_Filter
 {
 
     /**
-     * Name of the filter for identification purposes
+     * Name of the filter for identification purposes.
+     * @type string
      */
     public $name;
 
     /**
      * Pre-processor function, handles HTML before HTML Purifier
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
      */
-    public function preFilter($html, $config, $context) {
+    public function preFilter($html, $config, $context)
+    {
         return $html;
     }
 
     /**
      * Post-processor function, handles HTML after HTML Purifier
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
      */
-    public function postFilter($html, $config, $context) {
+    public function postFilter($html, $config, $context)
+    {
         return $html;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/ExtractStyleBlocks.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
new file mode 100644
index 0000000000..08e62c16bf
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
@@ -0,0 +1,338 @@
+<?php
+
+// why is this a top level function? Because PHP 5.2.0 doesn't seem to
+// understand how to interpret this filter if it's a static method.
+// It's all really silly, but if we go this route it might be reasonable
+// to coalesce all of these methods into one.
+function htmlpurifier_filter_extractstyleblocks_muteerrorhandler()
+{
+}
+
+/**
+ * This filter extracts <style> blocks from input HTML, cleans them up
+ * using CSSTidy, and then places them in $purifier->context->get('StyleBlocks')
+ * so they can be used elsewhere in the document.
+ *
+ * @note
+ *      See tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php for
+ *      sample usage.
+ *
+ * @note
+ *      This filter can also be used on stylesheets not included in the
+ *      document--something purists would probably prefer. Just directly
+ *      call HTMLPurifier_Filter_ExtractStyleBlocks->cleanCSS()
+ */
+class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
+{
+    /**
+     * @type string
+     */
+    public $name = 'ExtractStyleBlocks';
+
+    /**
+     * @type array
+     */
+    private $_styleMatches = array();
+
+    /**
+     * @type csstidy
+     */
+    private $_tidy;
+
+    /**
+     * @type HTMLPurifier_AttrDef_HTML_ID
+     */
+    private $_id_attrdef;
+
+    /**
+     * @type HTMLPurifier_AttrDef_CSS_Ident
+     */
+    private $_class_attrdef;
+
+    /**
+     * @type HTMLPurifier_AttrDef_Enum
+     */
+    private $_enum_attrdef;
+
+    public function __construct()
+    {
+        $this->_tidy = new csstidy();
+        $this->_tidy->set_cfg('lowercase_s', false);
+        $this->_id_attrdef = new HTMLPurifier_AttrDef_HTML_ID(true);
+        $this->_class_attrdef = new HTMLPurifier_AttrDef_CSS_Ident();
+        $this->_enum_attrdef = new HTMLPurifier_AttrDef_Enum(
+            array(
+                'first-child',
+                'link',
+                'visited',
+                'active',
+                'hover',
+                'focus'
+            )
+        );
+    }
+
+    /**
+     * Save the contents of CSS blocks to style matches
+     * @param array $matches preg_replace style $matches array
+     */
+    protected function styleCallback($matches)
+    {
+        $this->_styleMatches[] = $matches[1];
+    }
+
+    /**
+     * Removes inline <style> tags from HTML, saves them for later use
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     * @todo Extend to indicate non-text/css style blocks
+     */
+    public function preFilter($html, $config, $context)
+    {
+        $tidy = $config->get('Filter.ExtractStyleBlocks.TidyImpl');
+        if ($tidy !== null) {
+            $this->_tidy = $tidy;
+        }
+        $html = preg_replace_callback('#<style(?:\s.*)?>(.+)</style>#isU', array($this, 'styleCallback'), $html);
+        $style_blocks = $this->_styleMatches;
+        $this->_styleMatches = array(); // reset
+        $context->register('StyleBlocks', $style_blocks); // $context must not be reused
+        if ($this->_tidy) {
+            foreach ($style_blocks as &$style) {
+                $style = $this->cleanCSS($style, $config, $context);
+            }
+        }
+        return $html;
+    }
+
+    /**
+     * Takes CSS (the stuff found in <style>) and cleans it.
+     * @warning Requires CSSTidy <http://csstidy.sourceforge.net/>
+     * @param string $css CSS styling to clean
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @throws HTMLPurifier_Exception
+     * @return string Cleaned CSS
+     */
+    public function cleanCSS($css, $config, $context)
+    {
+        // prepare scope
+        $scope = $config->get('Filter.ExtractStyleBlocks.Scope');
+        if ($scope !== null) {
+            $scopes = array_map('trim', explode(',', $scope));
+        } else {
+            $scopes = array();
+        }
+        // remove comments from CSS
+        $css = trim($css);
+        if (strncmp('<!--', $css, 4) === 0) {
+            $css = substr($css, 4);
+        }
+        if (strlen($css) > 3 && substr($css, -3) == '-->') {
+            $css = substr($css, 0, -3);
+        }
+        $css = trim($css);
+        set_error_handler('htmlpurifier_filter_extractstyleblocks_muteerrorhandler');
+        $this->_tidy->parse($css);
+        restore_error_handler();
+        $css_definition = $config->getDefinition('CSS');
+        $html_definition = $config->getDefinition('HTML');
+        $new_css = array();
+        foreach ($this->_tidy->css as $k => $decls) {
+            // $decls are all CSS declarations inside an @ selector
+            $new_decls = array();
+            foreach ($decls as $selector => $style) {
+                $selector = trim($selector);
+                if ($selector === '') {
+                    continue;
+                } // should not happen
+                // Parse the selector
+                // Here is the relevant part of the CSS grammar:
+                //
+                // ruleset
+                //   : selector [ ',' S* selector ]* '{' ...
+                // selector
+                //   : simple_selector [ combinator selector | S+ [ combinator? selector ]? ]?
+                // combinator
+                //   : '+' S*
+                //   : '>' S*
+                // simple_selector
+                //   : element_name [ HASH | class | attrib | pseudo ]*
+                //   | [ HASH | class | attrib | pseudo ]+
+                // element_name
+                //   : IDENT | '*'
+                //   ;
+                // class
+                //   : '.' IDENT
+                //   ;
+                // attrib
+                //   : '[' S* IDENT S* [ [ '=' | INCLUDES | DASHMATCH ] S*
+                //     [ IDENT | STRING ] S* ]? ']'
+                //   ;
+                // pseudo
+                //   : ':' [ IDENT | FUNCTION S* [IDENT S*]? ')' ]
+                //   ;
+                //
+                // For reference, here are the relevant tokens:
+                //
+                // HASH         #{name}
+                // IDENT        {ident}
+                // INCLUDES     ==
+                // DASHMATCH    |=
+                // STRING       {string}
+                // FUNCTION     {ident}\(
+                //
+                // And the lexical scanner tokens
+                //
+                // name         {nmchar}+
+                // nmchar       [_a-z0-9-]|{nonascii}|{escape}
+                // nonascii     [\240-\377]
+                // escape       {unicode}|\\[^\r\n\f0-9a-f]
+                // unicode      \\{h}}{1,6}(\r\n|[ \t\r\n\f])?
+                // ident        -?{nmstart}{nmchar*}
+                // nmstart      [_a-z]|{nonascii}|{escape}
+                // string       {string1}|{string2}
+                // string1      \"([^\n\r\f\\"]|\\{nl}|{escape})*\"
+                // string2      \'([^\n\r\f\\"]|\\{nl}|{escape})*\'
+                //
+                // We'll implement a subset (in order to reduce attack
+                // surface); in particular:
+                //
+                //      - No Unicode support
+                //      - No escapes support
+                //      - No string support (by proxy no attrib support)
+                //      - element_name is matched against allowed
+                //        elements (some people might find this
+                //        annoying...)
+                //      - Pseudo-elements one of :first-child, :link,
+                //        :visited, :active, :hover, :focus
+
+                // handle ruleset
+                $selectors = array_map('trim', explode(',', $selector));
+                $new_selectors = array();
+                foreach ($selectors as $sel) {
+                    // split on +, > and spaces
+                    $basic_selectors = preg_split('/\s*([+> ])\s*/', $sel, -1, PREG_SPLIT_DELIM_CAPTURE);
+                    // even indices are chunks, odd indices are
+                    // delimiters
+                    $nsel = null;
+                    $delim = null; // guaranteed to be non-null after
+                    // two loop iterations
+                    for ($i = 0, $c = count($basic_selectors); $i < $c; $i++) {
+                        $x = $basic_selectors[$i];
+                        if ($i % 2) {
+                            // delimiter
+                            if ($x === ' ') {
+                                $delim = ' ';
+                            } else {
+                                $delim = ' ' . $x . ' ';
+                            }
+                        } else {
+                            // simple selector
+                            $components = preg_split('/([#.:])/', $x, -1, PREG_SPLIT_DELIM_CAPTURE);
+                            $sdelim = null;
+                            $nx = null;
+                            for ($j = 0, $cc = count($components); $j < $cc; $j++) {
+                                $y = $components[$j];
+                                if ($j === 0) {
+                                    if ($y === '*' || isset($html_definition->info[$y = strtolower($y)])) {
+                                        $nx = $y;
+                                    } else {
+                                        // $nx stays null; this matters
+                                        // if we don't manage to find
+                                        // any valid selector content,
+                                        // in which case we ignore the
+                                        // outer $delim
+                                    }
+                                } elseif ($j % 2) {
+                                    // set delimiter
+                                    $sdelim = $y;
+                                } else {
+                                    $attrdef = null;
+                                    if ($sdelim === '#') {
+                                        $attrdef = $this->_id_attrdef;
+                                    } elseif ($sdelim === '.') {
+                                        $attrdef = $this->_class_attrdef;
+                                    } elseif ($sdelim === ':') {
+                                        $attrdef = $this->_enum_attrdef;
+                                    } else {
+                                        throw new HTMLPurifier_Exception('broken invariant sdelim and preg_split');
+                                    }
+                                    $r = $attrdef->validate($y, $config, $context);
+                                    if ($r !== false) {
+                                        if ($r !== true) {
+                                            $y = $r;
+                                        }
+                                        if ($nx === null) {
+                                            $nx = '';
+                                        }
+                                        $nx .= $sdelim . $y;
+                                    }
+                                }
+                            }
+                            if ($nx !== null) {
+                                if ($nsel === null) {
+                                    $nsel = $nx;
+                                } else {
+                                    $nsel .= $delim . $nx;
+                                }
+                            } else {
+                                // delimiters to the left of invalid
+                                // basic selector ignored
+                            }
+                        }
+                    }
+                    if ($nsel !== null) {
+                        if (!empty($scopes)) {
+                            foreach ($scopes as $s) {
+                                $new_selectors[] = "$s $nsel";
+                            }
+                        } else {
+                            $new_selectors[] = $nsel;
+                        }
+                    }
+                }
+                if (empty($new_selectors)) {
+                    continue;
+                }
+                $selector = implode(', ', $new_selectors);
+                foreach ($style as $name => $value) {
+                    if (!isset($css_definition->info[$name])) {
+                        unset($style[$name]);
+                        continue;
+                    }
+                    $def = $css_definition->info[$name];
+                    $ret = $def->validate($value, $config, $context);
+                    if ($ret === false) {
+                        unset($style[$name]);
+                    } else {
+                        $style[$name] = $ret;
+                    }
+                }
+                $new_decls[$selector] = $style;
+            }
+            $new_css[$k] = $new_decls;
+        }
+        // remove stuff that shouldn't be used, could be reenabled
+        // after security risks are analyzed
+        $this->_tidy->css = $new_css;
+        $this->_tidy->import = array();
+        $this->_tidy->charset = null;
+        $this->_tidy->namespace = null;
+        $css = $this->_tidy->print->plain();
+        // we are going to escape any special characters <>& to ensure
+        // that no funny business occurs (i.e. </style> in a font-family prop).
+        if ($config->get('Filter.ExtractStyleBlocks.Escaping')) {
+            $css = str_replace(
+                array('<', '>', '&'),
+                array('\3C ', '\3E ', '\26 '),
+                $css
+            );
+        }
+        return $css;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php
new file mode 100644
index 0000000000..276d8362fa
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php
@@ -0,0 +1,65 @@
+<?php
+
+class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
+{
+
+    /**
+     * @type string
+     */
+    public $name = 'YouTube';
+
+    /**
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public function preFilter($html, $config, $context)
+    {
+        $pre_regex = '#<object[^>]+>.+?' .
+            '(?:http:)?//www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s';
+        $pre_replace = '<span class="youtube-embed">\1</span>';
+        return preg_replace($pre_regex, $pre_replace, $html);
+    }
+
+    /**
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public function postFilter($html, $config, $context)
+    {
+        $post_regex = '#<span class="youtube-embed">((?:v|cp)/[A-Za-z0-9\-_=]+)</span>#';
+        return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
+    }
+
+    /**
+     * @param $url
+     * @return string
+     */
+    protected function armorUrl($url)
+    {
+        return str_replace('--', '-&#45;', $url);
+    }
+
+    /**
+     * @param array $matches
+     * @return string
+     */
+    protected function postFilterCallback($matches)
+    {
+        $url = $this->armorUrl($matches[1]);
+        return '<object width="425" height="350" type="application/x-shockwave-flash" ' .
+        'data="//www.youtube.com/' . $url . '">' .
+        '<param name="movie" value="//www.youtube.com/' . $url . '"></param>' .
+        '<!--[if IE]>' .
+        '<embed src="//www.youtube.com/' . $url . '"' .
+        'type="application/x-shockwave-flash"' .
+        'wmode="transparent" width="425" height="350" />' .
+        '<![endif]-->' .
+        '</object>';
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Generator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Generator.php
similarity index 56%
rename from library/HTMLPurifier/Generator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Generator.php
index 4a62417271..6fb5687146 100644
--- a/library/HTMLPurifier/Generator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Generator.php
@@ -11,49 +11,64 @@ class HTMLPurifier_Generator
 {
 
     /**
-     * Whether or not generator should produce XML output
+     * Whether or not generator should produce XML output.
+     * @type bool
      */
     private $_xhtml = true;
 
     /**
-     * :HACK: Whether or not generator should comment the insides of <script> tags
+     * :HACK: Whether or not generator should comment the insides of <script> tags.
+     * @type bool
      */
     private $_scriptFix = false;
 
     /**
      * Cache of HTMLDefinition during HTML output to determine whether or
      * not attributes should be minimized.
+     * @type HTMLPurifier_HTMLDefinition
      */
     private $_def;
 
     /**
-     * Cache of %Output.SortAttr
+     * Cache of %Output.SortAttr.
+     * @type bool
      */
     private $_sortAttr;
 
     /**
-     * Cache of %Output.FlashCompat
+     * Cache of %Output.FlashCompat.
+     * @type bool
      */
     private $_flashCompat;
 
+    /**
+     * Cache of %Output.FixInnerHTML.
+     * @type bool
+     */
+    private $_innerHTMLFix;
+
     /**
      * Stack for keeping track of object information when outputting IE
      * compatibility code.
+     * @type array
      */
     private $_flashStack = array();
 
     /**
      * Configuration for the generator
+     * @type HTMLPurifier_Config
      */
     protected $config;
 
     /**
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
      */
-    public function __construct($config, $context) {
+    public function __construct($config, $context)
+    {
         $this->config = $config;
         $this->_scriptFix = $config->get('Output.CommentScriptContents');
+        $this->_innerHTMLFix = $config->get('Output.FixInnerHTML');
         $this->_sortAttr = $config->get('Output.SortAttr');
         $this->_flashCompat = $config->get('Output.FlashCompat');
         $this->_def = $config->getHTMLDefinition();
@@ -62,12 +77,14 @@ class HTMLPurifier_Generator
 
     /**
      * Generates HTML from an array of tokens.
-     * @param $tokens Array of HTMLPurifier_Token
-     * @param $config HTMLPurifier_Config object
-     * @return Generated HTML
+     * @param HTMLPurifier_Token[] $tokens Array of HTMLPurifier_Token
+     * @return string Generated HTML
      */
-    public function generateFromTokens($tokens) {
-        if (!$tokens) return '';
+    public function generateFromTokens($tokens)
+    {
+        if (!$tokens) {
+            return '';
+        }
 
         // Basic algorithm
         $html = '';
@@ -86,30 +103,41 @@ class HTMLPurifier_Generator
         // Tidy cleanup
         if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
             $tidy = new Tidy;
-            $tidy->parseString($html, array(
-               'indent'=> true,
-               'output-xhtml' => $this->_xhtml,
-               'show-body-only' => true,
-               'indent-spaces' => 2,
-               'wrap' => 68,
-            ), 'utf8');
+            $tidy->parseString(
+                $html,
+                array(
+                   'indent'=> true,
+                   'output-xhtml' => $this->_xhtml,
+                   'show-body-only' => true,
+                   'indent-spaces' => 2,
+                   'wrap' => 68,
+                ),
+                'utf8'
+            );
             $tidy->cleanRepair();
             $html = (string) $tidy; // explicit cast necessary
         }
 
         // Normalize newlines to system defined value
-        $nl = $this->config->get('Output.Newline');
-        if ($nl === null) $nl = PHP_EOL;
-        if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
+        if ($this->config->get('Core.NormalizeNewlines')) {
+            $nl = $this->config->get('Output.Newline');
+            if ($nl === null) {
+                $nl = PHP_EOL;
+            }
+            if ($nl !== "\n") {
+                $html = str_replace("\n", $nl, $html);
+            }
+        }
         return $html;
     }
 
     /**
      * Generates HTML from a single token.
-     * @param $token HTMLPurifier_Token object.
-     * @return Generated HTML
+     * @param HTMLPurifier_Token $token HTMLPurifier_Token object.
+     * @return string Generated HTML
      */
-    public function generateFromToken($token) {
+    public function generateFromToken($token)
+    {
         if (!$token instanceof HTMLPurifier_Token) {
             trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
             return '';
@@ -130,19 +158,7 @@ class HTMLPurifier_Generator
             $_extra = '';
             if ($this->_flashCompat) {
                 if ($token->name == "object" && !empty($this->_flashStack)) {
-                    $flash = array_pop($this->_flashStack);
-                    $compat_token = new HTMLPurifier_Token_Empty("embed");
-                    foreach ($flash->attr as $name => $val) {
-                        if ($name == "classid") continue;
-                        if ($name == "type") continue;
-                        if ($name == "data") $name = "src";
-                        $compat_token->attr[$name] = $val;
-                    }
-                    foreach ($flash->param as $name => $val) {
-                        if ($name == "movie") $name = "src";
-                        $compat_token->attr[$name] = $val;
-                    }
-                    $_extra = "<!--[if IE]>".$this->generateFromToken($compat_token)."<![endif]-->";
+                    // doesn't do anything for now
                 }
             }
             return $_extra . '</' . $token->name . '>';
@@ -169,11 +185,16 @@ class HTMLPurifier_Generator
 
     /**
      * Special case processor for the contents of script tags
+     * @param HTMLPurifier_Token $token HTMLPurifier_Token object.
+     * @return string
      * @warning This runs into problems if there's already a literal
      *          --> somewhere inside the script contents.
      */
-    public function generateScriptFromToken($token) {
-        if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
+    public function generateScriptFromToken($token)
+    {
+        if (!$token instanceof HTMLPurifier_Token_Text) {
+            return $this->generateFromToken($token);
+        }
         // Thanks <http://lachy.id.au/log/2005/05/script-comments>
         $data = preg_replace('#//\s*$#', '', $token->data);
         return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
@@ -182,24 +203,60 @@ class HTMLPurifier_Generator
     /**
      * Generates attribute declarations from attribute array.
      * @note This does not include the leading or trailing space.
-     * @param $assoc_array_of_attributes Attribute array
-     * @param $element Name of element attributes are for, used to check
+     * @param array $assoc_array_of_attributes Attribute array
+     * @param string $element Name of element attributes are for, used to check
      *        attribute minimization.
-     * @return Generate HTML fragment for insertion.
+     * @return string Generated HTML fragment for insertion.
      */
-    public function generateAttributes($assoc_array_of_attributes, $element = false) {
+    public function generateAttributes($assoc_array_of_attributes, $element = '')
+    {
         $html = '';
-        if ($this->_sortAttr) ksort($assoc_array_of_attributes);
+        if ($this->_sortAttr) {
+            ksort($assoc_array_of_attributes);
+        }
         foreach ($assoc_array_of_attributes as $key => $value) {
             if (!$this->_xhtml) {
                 // Remove namespaced attributes
-                if (strpos($key, ':') !== false) continue;
+                if (strpos($key, ':') !== false) {
+                    continue;
+                }
                 // Check if we should minimize the attribute: val="val" -> val
                 if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
                     $html .= $key . ' ';
                     continue;
                 }
             }
+            // Workaround for Internet Explorer innerHTML bug.
+            // Essentially, Internet Explorer, when calculating
+            // innerHTML, omits quotes if there are no instances of
+            // angled brackets, quotes or spaces.  However, when parsing
+            // HTML (for example, when you assign to innerHTML), it
+            // treats backticks as quotes.  Thus,
+            //      <img alt="``" />
+            // becomes
+            //      <img alt=`` />
+            // becomes
+            //      <img alt='' />
+            // Fortunately, all we need to do is trigger an appropriate
+            // quoting style, which we do by adding an extra space.
+            // This also is consistent with the W3C spec, which states
+            // that user agents may ignore leading or trailing
+            // whitespace (in fact, most don't, at least for attributes
+            // like alt, but an extra space at the end is barely
+            // noticeable).  Still, we have a configuration knob for
+            // this, since this transformation is not necesary if you
+            // don't process user input with innerHTML or you don't plan
+            // on supporting Internet Explorer.
+            if ($this->_innerHTMLFix) {
+                if (strpos($value, '`') !== false) {
+                    // check if correct quoting style would not already be
+                    // triggered
+                    if (strcspn($value, '"\' <>') === strlen($value)) {
+                        // protect!
+                        $value .= ' ';
+                    }
+                }
+            }
             $html .= $key.'="'.$this->escape($value).'" ';
         }
         return rtrim($html);
@@ -210,15 +267,20 @@ class HTMLPurifier_Generator
      * @todo This really ought to be protected, but until we have a facility
      *       for properly generating HTML here w/o using tokens, it stays
      *       public.
-     * @param $string String data to escape for HTML.
-     * @param $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
+     * @param string $string String data to escape for HTML.
+     * @param int $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
      *               permissible for non-attribute output.
-     * @return String escaped data.
+     * @return string escaped data.
      */
-    public function escape($string, $quote = ENT_COMPAT) {
+    public function escape($string, $quote = null)
+    {
+        // Workaround for APC bug on Mac Leopard reported by sidepodcast
+        // http://htmlpurifier.org/phorum/read.php?3,4823,4846
+        if ($quote === null) {
+            $quote = ENT_COMPAT;
+        }
         return htmlspecialchars($string, $quote, 'UTF-8');
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLDefinition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLDefinition.php
similarity index 70%
rename from library/HTMLPurifier/HTMLDefinition.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLDefinition.php
index c99ac11eb2..9b7b334dd9 100644
--- a/library/HTMLPurifier/HTMLDefinition.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLDefinition.php
@@ -29,60 +29,71 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
     // FULLY-PUBLIC VARIABLES ---------------------------------------------
 
     /**
-     * Associative array of element names to HTMLPurifier_ElementDef
+     * Associative array of element names to HTMLPurifier_ElementDef.
+     * @type HTMLPurifier_ElementDef[]
      */
     public $info = array();
 
     /**
      * Associative array of global attribute name to attribute definition.
+     * @type array
      */
     public $info_global_attr = array();
 
     /**
      * String name of parent element HTML will be going into.
+     * @type string
      */
     public $info_parent = 'div';
 
     /**
      * Definition for parent element, allows parent element to be a
      * tag that's not allowed inside the HTML fragment.
+     * @type HTMLPurifier_ElementDef
      */
     public $info_parent_def;
 
     /**
-     * String name of element used to wrap inline elements in block context
+     * String name of element used to wrap inline elements in block context.
+     * @type string
      * @note This is rarely used except for BLOCKQUOTEs in strict mode
      */
     public $info_block_wrapper = 'p';
 
     /**
-     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
+     * Associative array of deprecated tag name to HTMLPurifier_TagTransform.
+     * @type array
      */
     public $info_tag_transform = array();
 
     /**
      * Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
+     * @type HTMLPurifier_AttrTransform[]
      */
     public $info_attr_transform_pre = array();
 
     /**
      * Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
+     * @type HTMLPurifier_AttrTransform[]
      */
     public $info_attr_transform_post = array();
 
     /**
      * Nested lookup array of content set name (Block, Inline) to
      * element name to whether or not it belongs in that content set.
+     * @type array
      */
     public $info_content_sets = array();
 
     /**
      * Indexed list of HTMLPurifier_Injector to be used.
+     * @type HTMLPurifier_Injector[]
      */
     public $info_injector = array();
 
     /**
      * Doctype object
+     * @type HTMLPurifier_Doctype
      */
     public $doctype;
 
@@ -94,12 +105,13 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
      * Adds a custom attribute to a pre-existing element
      * @note This is strictly convenience, and does not have a corresponding
      *       method in HTMLPurifier_HTMLModule
-     * @param $element_name String element name to add attribute to
-     * @param $attr_name String name of attribute
-     * @param $def Attribute definition, can be string or object, see
+     * @param string $element_name Element name to add attribute to
+     * @param string $attr_name Name of attribute
+     * @param mixed $def Attribute definition, can be string or object, see
      *             HTMLPurifier_AttrTypes for details
      */
-    public function addAttribute($element_name, $attr_name, $def) {
+    public function addAttribute($element_name, $attr_name, $def)
+    {
         $module = $this->getAnonymousModule();
         if (!isset($module->info[$element_name])) {
             $element = $module->addBlankElement($element_name);
@@ -111,10 +123,11 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
 
     /**
      * Adds a custom element to your HTML definition
-     * @note See HTMLPurifier_HTMLModule::addElement for detailed
+     * @see HTMLPurifier_HTMLModule::addElement() for detailed
      *       parameter and return value descriptions.
      */
-    public function addElement($element_name, $type, $contents, $attr_collections, $attributes = array()) {
+    public function addElement($element_name, $type, $contents, $attr_collections, $attributes = array())
+    {
         $module = $this->getAnonymousModule();
         // assume that if the user is calling this, the element
         // is safe. This may not be a good idea
@@ -125,10 +138,13 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
     /**
      * Adds a blank element to your HTML definition, for overriding
      * existing behavior
-     * @note See HTMLPurifier_HTMLModule::addBlankElement for detailed
+     * @param string $element_name
+     * @return HTMLPurifier_ElementDef
+     * @see HTMLPurifier_HTMLModule::addBlankElement() for detailed
      *       parameter and return value descriptions.
      */
-    public function addBlankElement($element_name) {
+    public function addBlankElement($element_name)
+    {
         $module  = $this->getAnonymousModule();
         $element = $module->addBlankElement($element_name);
         return $element;
@@ -138,8 +154,10 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
      * Retrieves a reference to the anonymous module, so you can
      * bust out advanced features without having to make your own
      * module.
+     * @return HTMLPurifier_HTMLModule
      */
-    public function getAnonymousModule() {
+    public function getAnonymousModule()
+    {
         if (!$this->_anonModule) {
             $this->_anonModule = new HTMLPurifier_HTMLModule();
             $this->_anonModule->name = 'Anonymous';
@@ -147,22 +165,33 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
         return $this->_anonModule;
     }
 
-    private $_anonModule;
-
+    private $_anonModule = null;
 
     // PUBLIC BUT INTERNAL VARIABLES --------------------------------------
 
+    /**
+     * @type string
+     */
     public $type = 'HTML';
-    public $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
+
+    /**
+     * @type HTMLPurifier_HTMLModuleManager
+     */
+    public $manager;
 
     /**
      * Performs low-cost, preliminary initialization.
      */
-    public function __construct() {
+    public function __construct()
+    {
         $this->manager = new HTMLPurifier_HTMLModuleManager();
     }
 
-    protected function doSetup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    protected function doSetup($config)
+    {
         $this->processModules($config);
         $this->setupConfigStuff($config);
         unset($this->manager);
@@ -176,9 +205,10 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
 
     /**
      * Extract out the information from the manager
+     * @param HTMLPurifier_Config $config
      */
-    protected function processModules($config) {
-
+    protected function processModules($config)
+    {
         if ($this->_anonModule) {
             // for user specific changes
             // this is late-loaded so we don't have to deal with PHP4
@@ -191,40 +221,53 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
         $this->doctype = $this->manager->doctype;
 
         foreach ($this->manager->modules as $module) {
-            foreach($module->info_tag_transform as $k => $v) {
-                if ($v === false) unset($this->info_tag_transform[$k]);
-                else $this->info_tag_transform[$k] = $v;
+            foreach ($module->info_tag_transform as $k => $v) {
+                if ($v === false) {
+                    unset($this->info_tag_transform[$k]);
+                } else {
+                    $this->info_tag_transform[$k] = $v;
+                }
             }
-            foreach($module->info_attr_transform_pre as $k => $v) {
-                if ($v === false) unset($this->info_attr_transform_pre[$k]);
-                else $this->info_attr_transform_pre[$k] = $v;
+            foreach ($module->info_attr_transform_pre as $k => $v) {
+                if ($v === false) {
+                    unset($this->info_attr_transform_pre[$k]);
+                } else {
+                    $this->info_attr_transform_pre[$k] = $v;
+                }
             }
-            foreach($module->info_attr_transform_post as $k => $v) {
-                if ($v === false) unset($this->info_attr_transform_post[$k]);
-                else $this->info_attr_transform_post[$k] = $v;
+            foreach ($module->info_attr_transform_post as $k => $v) {
+                if ($v === false) {
+                    unset($this->info_attr_transform_post[$k]);
+                } else {
+                    $this->info_attr_transform_post[$k] = $v;
+                }
             }
             foreach ($module->info_injector as $k => $v) {
-                if ($v === false) unset($this->info_injector[$k]);
-                else $this->info_injector[$k] = $v;
+                if ($v === false) {
+                    unset($this->info_injector[$k]);
+                } else {
+                    $this->info_injector[$k] = $v;
+                }
             }
         }
-
         $this->info = $this->manager->getElements();
         $this->info_content_sets = $this->manager->contentSets->lookup;
-
     }
 
     /**
      * Sets up stuff based on config. We need a better way of doing this.
+     * @param HTMLPurifier_Config $config
      */
-    protected function setupConfigStuff($config) {
-
+    protected function setupConfigStuff($config)
+    {
         $block_wrapper = $config->get('HTML.BlockWrapper');
         if (isset($this->info_content_sets['Block'][$block_wrapper])) {
             $this->info_block_wrapper = $block_wrapper;
         } else {
-            trigger_error('Cannot use non-block element as block wrapper',
-                E_USER_ERROR);
+            trigger_error(
+                'Cannot use non-block element as block wrapper',
+                E_USER_ERROR
+            );
         }
 
         $parent = $config->get('HTML.Parent');
@@ -233,14 +276,15 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
             $this->info_parent = $parent;
             $this->info_parent_def = $def;
         } else {
-            trigger_error('Cannot use unrecognized element as parent',
-                E_USER_ERROR);
+            trigger_error(
+                'Cannot use unrecognized element as parent',
+                E_USER_ERROR
+            );
             $this->info_parent_def = $this->manager->getElement($this->info_parent, true);
         }
 
         // support template text
-        $support = "(for information on implementing this, see the ".
-                   "support forums) ";
+        $support = "(for information on implementing this, see the support forums) ";
 
         // setup allowed elements -----------------------------------------
 
@@ -256,7 +300,9 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
 
         if (is_array($allowed_elements)) {
             foreach ($this->info as $name => $d) {
-                if(!isset($allowed_elements[$name])) unset($this->info[$name]);
+                if (!isset($allowed_elements[$name])) {
+                    unset($this->info[$name]);
+                }
                 unset($allowed_elements[$name]);
             }
             // emit errors
@@ -270,7 +316,6 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
 
         $allowed_attributes_mutable = $allowed_attributes; // by copy!
         if (is_array($allowed_attributes)) {
-
             // This actually doesn't do anything, since we went away from
             // global attributes. It's possible that userland code uses
             // it, but HTMLModuleManager doesn't!
@@ -285,7 +330,9 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
                         unset($allowed_attributes_mutable[$key]);
                     }
                 }
-                if ($delete) unset($this->info_global_attr[$attr]);
+                if ($delete) {
+                    unset($this->info_global_attr[$attr]);
+                }
             }
 
             foreach ($this->info as $tag => $info) {
@@ -300,7 +347,16 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
                             unset($allowed_attributes_mutable[$key]);
                         }
                     }
-                    if ($delete) unset($this->info[$tag]->attr[$attr]);
+                    if ($delete) {
+                        if ($this->info[$tag]->attr[$attr]->required) {
+                            trigger_error(
+                                "Required attribute '$attr' in element '$tag' " .
+                                "was not allowed, which means '$tag' will not be allowed either",
+                                E_USER_WARNING
+                            );
+                        }
+                        unset($this->info[$tag]->attr[$attr]);
+                    }
                 }
             }
             // emit errors
@@ -313,23 +369,29 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
                             $element = htmlspecialchars($bits[0]);
                             $attribute = htmlspecialchars($bits[1]);
                             if (!isset($this->info[$element])) {
-                                trigger_error("Cannot allow attribute '$attribute' if element '$element' is not allowed/supported $support");
+                                trigger_error(
+                                    "Cannot allow attribute '$attribute' if element " .
+                                    "'$element' is not allowed/supported $support"
+                                );
                             } else {
-                                trigger_error("Attribute '$attribute' in element '$element' not supported $support",
-                                    E_USER_WARNING);
+                                trigger_error(
+                                    "Attribute '$attribute' in element '$element' not supported $support",
+                                    E_USER_WARNING
+                                );
                             }
                             break;
                         }
                         // otherwise fall through
                     case 1:
                         $attribute = htmlspecialchars($bits[0]);
-                        trigger_error("Global attribute '$attribute' is not ".
+                        trigger_error(
+                            "Global attribute '$attribute' is not ".
                             "supported in any elements $support",
-                            E_USER_WARNING);
+                            E_USER_WARNING
+                        );
                         break;
                 }
             }
-
         }
 
         // setup forbidden elements ---------------------------------------
@@ -343,25 +405,34 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
                 continue;
             }
             foreach ($info->attr as $attr => $x) {
-                if (
-                    isset($forbidden_attributes["$tag@$attr"]) ||
+                if (isset($forbidden_attributes["$tag@$attr"]) ||
                     isset($forbidden_attributes["*@$attr"]) ||
                     isset($forbidden_attributes[$attr])
                 ) {
                     unset($this->info[$tag]->attr[$attr]);
                     continue;
-                } // this segment might get removed eventually
-                elseif (isset($forbidden_attributes["$tag.$attr"])) {
+                } elseif (isset($forbidden_attributes["$tag.$attr"])) { // this segment might get removed eventually
                     // $tag.$attr are not user supplied, so no worries!
-                    trigger_error("Error with $tag.$attr: tag.attr syntax not supported for HTML.ForbiddenAttributes; use tag@attr instead", E_USER_WARNING);
+                    trigger_error(
+                        "Error with $tag.$attr: tag.attr syntax not supported for " .
+                        "HTML.ForbiddenAttributes; use tag@attr instead",
+                        E_USER_WARNING
+                    );
                 }
             }
         }
         foreach ($forbidden_attributes as $key => $v) {
-            if (strlen($key) < 2) continue;
-            if ($key[0] != '*') continue;
+            if (strlen($key) < 2) {
+                continue;
+            }
+            if ($key[0] != '*') {
+                continue;
+            }
             if ($key[1] == '.') {
-                trigger_error("Error with $key: *.attr syntax not supported for HTML.ForbiddenAttributes; use attr instead", E_USER_WARNING);
+                trigger_error(
+                    "Error with $key: *.attr syntax not supported for HTML.ForbiddenAttributes; use attr instead",
+                    E_USER_WARNING
+                );
             }
         }
 
@@ -380,12 +451,12 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
      * separate lists for processing. Format is element[attr1|attr2],element2...
      * @warning Although it's largely drawn from TinyMCE's implementation,
      *      it is different, and you'll probably have to modify your lists
-     * @param $list String list to parse
-     * @param array($allowed_elements, $allowed_attributes)
+     * @param array $list String list to parse
+     * @return array
      * @todo Give this its own class, probably static interface
      */
-    public function parseTinyMCEAllowedList($list) {
-
+    public function parseTinyMCEAllowedList($list)
+    {
         $list = str_replace(array(' ', "\t"), '', $list);
 
         $elements = array();
@@ -393,7 +464,9 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
 
         $chunks = preg_split('/(,|[\n\r]+)/', $list);
         foreach ($chunks as $chunk) {
-            if (empty($chunk)) continue;
+            if (empty($chunk)) {
+                continue;
+            }
             // remove TinyMCE element control characters
             if (!strpos($chunk, '[')) {
                 $element = $chunk;
@@ -401,20 +474,20 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
             } else {
                 list($element, $attr) = explode('[', $chunk);
             }
-            if ($element !== '*') $elements[$element] = true;
-            if (!$attr) continue;
+            if ($element !== '*') {
+                $elements[$element] = true;
+            }
+            if (!$attr) {
+                continue;
+            }
             $attr = substr($attr, 0, strlen($attr) - 1); // remove trailing ]
             $attr = explode('|', $attr);
             foreach ($attr as $key) {
                 $attributes["$element.$key"] = true;
             }
         }
-
         return array($elements, $attributes);
-
     }
-
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule.php
similarity index 71%
rename from library/HTMLPurifier/HTMLModule.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule.php
index 072cf68084..bb3a9230b1 100644
--- a/library/HTMLPurifier/HTMLModule.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule.php
@@ -21,13 +21,15 @@ class HTMLPurifier_HTMLModule
     // -- Overloadable ----------------------------------------------------
 
     /**
-     * Short unique string identifier of the module
+     * Short unique string identifier of the module.
+     * @type string
      */
     public $name;
 
     /**
-     * Informally, a list of elements this module changes. Not used in
-     * any significant way.
+     * Informally, a list of elements this module changes.
+     * Not used in any significant way.
+     * @type array
      */
     public $elements = array();
 
@@ -35,6 +37,7 @@ class HTMLPurifier_HTMLModule
      * Associative array of element names to element definitions.
      * Some definitions may be incomplete, to be merged in later
      * with the full definition.
+     * @type array
      */
     public $info = array();
 
@@ -43,6 +46,7 @@ class HTMLPurifier_HTMLModule
      * This is commonly used to, say, add an A element to the Inline
      * content set. This corresponds to an internal variable $content_sets
      * and NOT info_content_sets member variable of HTMLDefinition.
+     * @type array
      */
     public $content_sets = array();
 
@@ -53,21 +57,25 @@ class HTMLPurifier_HTMLModule
      * the style attribute to the Core. Corresponds to HTMLDefinition's
      * attr_collections->info, since the object's data is only info,
      * with extra behavior associated with it.
+     * @type array
      */
     public $attr_collections = array();
 
     /**
-     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
+     * Associative array of deprecated tag name to HTMLPurifier_TagTransform.
+     * @type array
      */
     public $info_tag_transform = array();
 
     /**
      * List of HTMLPurifier_AttrTransform to be performed before validation.
+     * @type array
      */
     public $info_attr_transform_pre = array();
 
     /**
      * List of HTMLPurifier_AttrTransform to be performed after validation.
+     * @type array
      */
     public $info_attr_transform_post = array();
 
@@ -76,6 +84,7 @@ class HTMLPurifier_HTMLModule
      * An injector will only be invoked if all of it's pre-requisites are met;
      * if an injector fails setup, there will be no error; it will simply be
      * silently disabled.
+     * @type array
      */
     public $info_injector = array();
 
@@ -84,6 +93,7 @@ class HTMLPurifier_HTMLModule
      * For optimization reasons: may save a call to a function. Be sure
      * to set it if you do implement getChildDef(), otherwise it will have
      * no effect!
+     * @type bool
      */
     public $defines_child_def = false;
 
@@ -94,6 +104,7 @@ class HTMLPurifier_HTMLModule
      * which is based off of safe HTML, to explicitly say, "This is safe," even
      * though there are modules which are "unsafe")
      *
+     * @type bool
      * @note Previously, safety could be applied at an element level granularity.
      *       We've removed this ability, so in order to add "unsafe" elements
      *       or attributes, a dedicated module with this property set to false
@@ -106,51 +117,62 @@ class HTMLPurifier_HTMLModule
      * content_model and content_model_type member variables of
      * the HTMLPurifier_ElementDef class. There is a similar function
      * in HTMLPurifier_HTMLDefinition.
-     * @param $def HTMLPurifier_ElementDef instance
+     * @param HTMLPurifier_ElementDef $def
      * @return HTMLPurifier_ChildDef subclass
      */
-    public function getChildDef($def) {return false;}
+    public function getChildDef($def)
+    {
+        return false;
+    }
 
     // -- Convenience -----------------------------------------------------
 
     /**
      * Convenience function that sets up a new element
-     * @param $element Name of element to add
-     * @param $type What content set should element be registered to?
+     * @param string $element Name of element to add
+     * @param string|bool $type What content set should element be registered to?
      *              Set as false to skip this step.
-     * @param $contents Allowed children in form of:
+     * @param string $contents Allowed children in form of:
      *              "$content_model_type: $content_model"
-     * @param $attr_includes What attribute collections to register to
+     * @param array $attr_includes What attribute collections to register to
      *              element?
-     * @param $attr What unique attributes does the element define?
-     * @note See ElementDef for in-depth descriptions of these parameters.
-     * @return Created element definition object, so you
+     * @param array $attr What unique attributes does the element define?
+     * @see HTMLPurifier_ElementDef:: for in-depth descriptions of these parameters.
+     * @return HTMLPurifier_ElementDef Created element definition object, so you
      *         can set advanced parameters
      */
-    public function addElement($element, $type, $contents, $attr_includes = array(), $attr = array()) {
+    public function addElement($element, $type, $contents, $attr_includes = array(), $attr = array())
+    {
         $this->elements[] = $element;
         // parse content_model
         list($content_model_type, $content_model) = $this->parseContents($contents);
         // merge in attribute inclusions
         $this->mergeInAttrIncludes($attr, $attr_includes);
         // add element to content sets
-        if ($type) $this->addElementToContentSet($element, $type);
+        if ($type) {
+            $this->addElementToContentSet($element, $type);
+        }
         // create element
         $this->info[$element] = HTMLPurifier_ElementDef::create(
-            $content_model, $content_model_type, $attr
+            $content_model,
+            $content_model_type,
+            $attr
         );
         // literal object $contents means direct child manipulation
-        if (!is_string($contents)) $this->info[$element]->child = $contents;
+        if (!is_string($contents)) {
+            $this->info[$element]->child = $contents;
+        }
         return $this->info[$element];
     }
 
     /**
      * Convenience function that creates a totally blank, non-standalone
      * element.
-     * @param $element Name of element to create
-     * @return Created element
+     * @param string $element Name of element to create
+     * @return HTMLPurifier_ElementDef Created element
      */
-    public function addBlankElement($element) {
+    public function addBlankElement($element)
+    {
         if (!isset($this->info[$element])) {
             $this->elements[] = $element;
             $this->info[$element] = new HTMLPurifier_ElementDef();
@@ -163,27 +185,35 @@ class HTMLPurifier_HTMLModule
 
     /**
      * Convenience function that registers an element to a content set
-     * @param Element to register
-     * @param Name content set (warning: case sensitive, usually upper-case
+     * @param string $element Element to register
+     * @param string $type Name content set (warning: case sensitive, usually upper-case
      *        first letter)
      */
-    public function addElementToContentSet($element, $type) {
-        if (!isset($this->content_sets[$type])) $this->content_sets[$type] = '';
-        else $this->content_sets[$type] .= ' | ';
+    public function addElementToContentSet($element, $type)
+    {
+        if (!isset($this->content_sets[$type])) {
+            $this->content_sets[$type] = '';
+        } else {
+            $this->content_sets[$type] .= ' | ';
+        }
         $this->content_sets[$type] .= $element;
     }
 
     /**
      * Convenience function that transforms single-string contents
      * into separate content model and content model type
-     * @param $contents Allowed children in form of:
+     * @param string $contents Allowed children in form of:
      *                  "$content_model_type: $content_model"
+     * @return array
      * @note If contents is an object, an array of two nulls will be
      *       returned, and the callee needs to take the original $contents
      *       and use it directly.
      */
-    public function parseContents($contents) {
-        if (!is_string($contents)) return array(null, null); // defer
+    public function parseContents($contents)
+    {
+        if (!is_string($contents)) {
+            return array(null, null);
+        } // defer
         switch ($contents) {
             // check for shorthand content model forms
             case 'Empty':
@@ -202,13 +232,17 @@ class HTMLPurifier_HTMLModule
     /**
      * Convenience function that merges a list of attribute includes into
      * an attribute array.
-     * @param $attr Reference to attr array to modify
-     * @param $attr_includes Array of includes / string include to merge in
+     * @param array $attr Reference to attr array to modify
+     * @param array $attr_includes Array of includes / string include to merge in
      */
-    public function mergeInAttrIncludes(&$attr, $attr_includes) {
+    public function mergeInAttrIncludes(&$attr, $attr_includes)
+    {
         if (!is_array($attr_includes)) {
-            if (empty($attr_includes)) $attr_includes = array();
-            else $attr_includes = array($attr_includes);
+            if (empty($attr_includes)) {
+                $attr_includes = array();
+            } else {
+                $attr_includes = array($attr_includes);
+            }
         }
         $attr[0] = $attr_includes;
     }
@@ -216,16 +250,21 @@ class HTMLPurifier_HTMLModule
     /**
      * Convenience function that generates a lookup table with boolean
      * true as value.
-     * @param $list List of values to turn into a lookup
+     * @param string $list List of values to turn into a lookup
      * @note You can also pass an arbitrary number of arguments in
      *       place of the regular argument
-     * @return Lookup array equivalent of list
+     * @return array array equivalent of list
      */
-    public function makeLookup($list) {
-        if (is_string($list)) $list = func_get_args();
+    public function makeLookup($list)
+    {
+        if (is_string($list)) {
+            $list = func_get_args();
+        }
         $ret = array();
         foreach ($list as $value) {
-            if (is_null($value)) continue;
+            if (is_null($value)) {
+                continue;
+            }
             $ret[$value] = true;
         }
         return $ret;
@@ -235,10 +274,11 @@ class HTMLPurifier_HTMLModule
      * Lazy load construction of the module after determining whether
      * or not it's needed, and also when a finalized configuration object
      * is available.
-     * @param $config Instance of HTMLPurifier_Config
+     * @param HTMLPurifier_Config $config
      */
-    public function setup($config) {}
-
+    public function setup($config)
+    {
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Bdo.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Bdo.php
similarity index 66%
rename from library/HTMLPurifier/HTMLModule/Bdo.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Bdo.php
index 3d66f1b4e1..1e67c790d0 100644
--- a/library/HTMLPurifier/HTMLModule/Bdo.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Bdo.php
@@ -7,25 +7,38 @@
 class HTMLPurifier_HTMLModule_Bdo extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Bdo';
+
+    /**
+     * @type array
+     */
     public $attr_collections = array(
         'I18N' => array('dir' => false)
     );
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $bdo = $this->addElement(
-            'bdo', 'Inline', 'Inline', array('Core', 'Lang'),
+            'bdo',
+            'Inline',
+            'Inline',
+            array('Core', 'Lang'),
             array(
                 'dir' => 'Enum#ltr,rtl', // required
                 // The Abstract Module specification has the attribute
                 // inclusions wrong for bdo: bdo allows Lang
             )
         );
-        $bdo->attr_transform_post['required-dir'] = new HTMLPurifier_AttrTransform_BdoDir();
+        $bdo->attr_transform_post[] = new HTMLPurifier_AttrTransform_BdoDir();
 
         $this->attr_collections['I18N']['dir'] = 'Enum#ltr,rtl';
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/CommonAttributes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/CommonAttributes.php
similarity index 89%
rename from library/HTMLPurifier/HTMLModule/CommonAttributes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/CommonAttributes.php
index 7c15da84fc..a96ab1bef1 100644
--- a/library/HTMLPurifier/HTMLModule/CommonAttributes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/CommonAttributes.php
@@ -2,8 +2,14 @@
 
 class HTMLPurifier_HTMLModule_CommonAttributes extends HTMLPurifier_HTMLModule
 {
+    /**
+     * @type string
+     */
     public $name = 'CommonAttributes';
 
+    /**
+     * @type array
+     */
     public $attr_collections = array(
         'Core' => array(
             0 => array('Style'),
@@ -20,7 +26,6 @@ class HTMLPurifier_HTMLModule_CommonAttributes extends HTMLPurifier_HTMLModule
             0 => array('Core', 'I18N')
         )
     );
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Edit.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Edit.php
similarity index 71%
rename from library/HTMLPurifier/HTMLModule/Edit.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Edit.php
index ff93690555..a9042a3577 100644
--- a/library/HTMLPurifier/HTMLModule/Edit.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Edit.php
@@ -7,9 +7,16 @@
 class HTMLPurifier_HTMLModule_Edit extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Edit';
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $contents = 'Chameleon: #PCDATA | Inline ! #PCDATA | Flow';
         $attr = array(
             'cite' => 'URI',
@@ -26,13 +33,23 @@ class HTMLPurifier_HTMLModule_Edit extends HTMLPurifier_HTMLModule
     // Inline context ! Block context (exclamation mark is
     // separator, see getChildDef for parsing)
 
+    /**
+     * @type bool
+     */
     public $defines_child_def = true;
-    public function getChildDef($def) {
-        if ($def->content_model_type != 'chameleon') return false;
+
+    /**
+     * @param HTMLPurifier_ElementDef $def
+     * @return HTMLPurifier_ChildDef_Chameleon
+     */
+    public function getChildDef($def)
+    {
+        if ($def->content_model_type != 'chameleon') {
+            return false;
+        }
         $value = explode('!', $def->content_model);
         return new HTMLPurifier_ChildDef_Chameleon($value[0], $value[1]);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Forms.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Forms.php
new file mode 100644
index 0000000000..6f7ddbc05b
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Forms.php
@@ -0,0 +1,190 @@
+<?php
+
+/**
+ * XHTML 1.1 Forms module, defines all form-related elements found in HTML 4.
+ */
+class HTMLPurifier_HTMLModule_Forms extends HTMLPurifier_HTMLModule
+{
+    /**
+     * @type string
+     */
+    public $name = 'Forms';
+
+    /**
+     * @type bool
+     */
+    public $safe = false;
+
+    /**
+     * @type array
+     */
+    public $content_sets = array(
+        'Block' => 'Form',
+        'Inline' => 'Formctrl',
+    );
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $form = $this->addElement(
+            'form',
+            'Form',
+            'Required: Heading | List | Block | fieldset',
+            'Common',
+            array(
+                'accept' => 'ContentTypes',
+                'accept-charset' => 'Charsets',
+                'action*' => 'URI',
+                'method' => 'Enum#get,post',
+                // really ContentType, but these two are the only ones used today
+                'enctype' => 'Enum#application/x-www-form-urlencoded,multipart/form-data',
+            )
+        );
+        $form->excludes = array('form' => true);
+
+        $input = $this->addElement(
+            'input',
+            'Formctrl',
+            'Empty',
+            'Common',
+            array(
+                'accept' => 'ContentTypes',
+                'accesskey' => 'Character',
+                'alt' => 'Text',
+                'checked' => 'Bool#checked',
+                'disabled' => 'Bool#disabled',
+                'maxlength' => 'Number',
+                'name' => 'CDATA',
+                'readonly' => 'Bool#readonly',
+                'size' => 'Number',
+                'src' => 'URI#embedded',
+                'tabindex' => 'Number',
+                'type' => 'Enum#text,password,checkbox,button,radio,submit,reset,file,hidden,image',
+                'value' => 'CDATA',
+            )
+        );
+        $input->attr_transform_post[] = new HTMLPurifier_AttrTransform_Input();
+
+        $this->addElement(
+            'select',
+            'Formctrl',
+            'Required: optgroup | option',
+            'Common',
+            array(
+                'disabled' => 'Bool#disabled',
+                'multiple' => 'Bool#multiple',
+                'name' => 'CDATA',
+                'size' => 'Number',
+                'tabindex' => 'Number',
+            )
+        );
+
+        $this->addElement(
+            'option',
+            false,
+            'Optional: #PCDATA',
+            'Common',
+            array(
+                'disabled' => 'Bool#disabled',
+                'label' => 'Text',
+                'selected' => 'Bool#selected',
+                'value' => 'CDATA',
+            )
+        );
+        // It's illegal for there to be more than one selected, but not
+        // be multiple. Also, no selected means undefined behavior. This might
+        // be difficult to implement; perhaps an injector, or a context variable.
+
+        $textarea = $this->addElement(
+            'textarea',
+            'Formctrl',
+            'Optional: #PCDATA',
+            'Common',
+            array(
+                'accesskey' => 'Character',
+                'cols*' => 'Number',
+                'disabled' => 'Bool#disabled',
+                'name' => 'CDATA',
+                'readonly' => 'Bool#readonly',
+                'rows*' => 'Number',
+                'tabindex' => 'Number',
+            )
+        );
+        $textarea->attr_transform_pre[] = new HTMLPurifier_AttrTransform_Textarea();
+
+        $button = $this->addElement(
+            'button',
+            'Formctrl',
+            'Optional: #PCDATA | Heading | List | Block | Inline',
+            'Common',
+            array(
+                'accesskey' => 'Character',
+                'disabled' => 'Bool#disabled',
+                'name' => 'CDATA',
+                'tabindex' => 'Number',
+                'type' => 'Enum#button,submit,reset',
+                'value' => 'CDATA',
+            )
+        );
+
+        // For exclusions, ideally we'd specify content sets, not literal elements
+        $button->excludes = $this->makeLookup(
+            'form',
+            'fieldset', // Form
+            'input',
+            'select',
+            'textarea',
+            'label',
+            'button', // Formctrl
+            'a', // as per HTML 4.01 spec, this is omitted by modularization
+            'isindex',
+            'iframe' // legacy items
+        );
+
+        // Extra exclusion: img usemap="" is not permitted within this element.
+        // We'll omit this for now, since we don't have any good way of
+        // indicating it yet.
+
+        // This is HIGHLY user-unfriendly; we need a custom child-def for this
+        $this->addElement('fieldset', 'Form', 'Custom: (#WS?,legend,(Flow|#PCDATA)*)', 'Common');
+
+        $label = $this->addElement(
+            'label',
+            'Formctrl',
+            'Optional: #PCDATA | Inline',
+            'Common',
+            array(
+                'accesskey' => 'Character',
+                // 'for' => 'IDREF', // IDREF not implemented, cannot allow
+            )
+        );
+        $label->excludes = array('label' => true);
+
+        $this->addElement(
+            'legend',
+            false,
+            'Optional: #PCDATA | Inline',
+            'Common',
+            array(
+                'accesskey' => 'Character',
+            )
+        );
+
+        $this->addElement(
+            'optgroup',
+            false,
+            'Required: option',
+            'Common',
+            array(
+                'disabled' => 'Bool#disabled',
+                'label*' => 'Text',
+            )
+        );
+        // Don't forget an injector for <isindex>. This one's a little complex
+        // because it maps to multiple elements.
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Hypertext.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Hypertext.php
similarity index 78%
rename from library/HTMLPurifier/HTMLModule/Hypertext.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Hypertext.php
index d7e9bdd27e..72d7a31e68 100644
--- a/library/HTMLPurifier/HTMLModule/Hypertext.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Hypertext.php
@@ -6,11 +6,21 @@
 class HTMLPurifier_HTMLModule_Hypertext extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Hypertext';
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $a = $this->addElement(
-            'a', 'Inline', 'Inline', 'Common',
+            'a',
+            'Inline',
+            'Inline',
+            'Common',
             array(
                 // 'accesskey' => 'Character',
                 // 'charset' => 'Charset',
@@ -25,7 +35,6 @@ class HTMLPurifier_HTMLModule_Hypertext extends HTMLPurifier_HTMLModule
         $a->formatting = true;
         $a->excludes = array('a' => true);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Iframe.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Iframe.php
new file mode 100644
index 0000000000..f7e7c91c02
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Iframe.php
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * XHTML 1.1 Iframe Module provides inline frames.
+ *
+ * @note This module is not considered safe unless an Iframe
+ * whitelisting mechanism is specified.  Currently, the only
+ * such mechanism is %URL.SafeIframeRegexp
+ */
+class HTMLPurifier_HTMLModule_Iframe extends HTMLPurifier_HTMLModule
+{
+
+    /**
+     * @type string
+     */
+    public $name = 'Iframe';
+
+    /**
+     * @type bool
+     */
+    public $safe = false;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        if ($config->get('HTML.SafeIframe')) {
+            $this->safe = true;
+        }
+        $this->addElement(
+            'iframe',
+            'Inline',
+            'Flow',
+            'Common',
+            array(
+                'src' => 'URI#embedded',
+                'width' => 'Length',
+                'height' => 'Length',
+                'name' => 'ID',
+                'scrolling' => 'Enum#yes,no,auto',
+                'frameborder' => 'Enum#0,1',
+                'longdesc' => 'URI',
+                'marginheight' => 'Pixels',
+                'marginwidth' => 'Pixels',
+            )
+        );
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Image.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Image.php
similarity index 80%
rename from library/HTMLPurifier/HTMLModule/Image.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Image.php
index 948d435bcd..0f5fdb3baf 100644
--- a/library/HTMLPurifier/HTMLModule/Image.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Image.php
@@ -8,18 +8,28 @@
 class HTMLPurifier_HTMLModule_Image extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Image';
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $max = $config->get('HTML.MaxImgLength');
         $img = $this->addElement(
-            'img', 'Inline', 'Empty', 'Common',
+            'img',
+            'Inline',
+            'Empty',
+            'Common',
             array(
                 'alt*' => 'Text',
                 // According to the spec, it's Length, but percents can
                 // be abused, so we allow only Pixels.
                 'height' => 'Pixels#' . $max,
-                'width'  => 'Pixels#' . $max,
+                'width' => 'Pixels#' . $max,
                 'longdesc' => 'URI',
                 'src*' => new HTMLPurifier_AttrDef_URI(true), // embedded
             )
@@ -34,7 +44,6 @@ class HTMLPurifier_HTMLModule_Image extends HTMLPurifier_HTMLModule
         $img->attr_transform_post[] =
             new HTMLPurifier_AttrTransform_ImgRequired();
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Legacy.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Legacy.php
similarity index 67%
rename from library/HTMLPurifier/HTMLModule/Legacy.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Legacy.php
index df33927ba6..86b5299579 100644
--- a/library/HTMLPurifier/HTMLModule/Legacy.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Legacy.php
@@ -18,29 +18,58 @@
 
 class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Legacy';
 
-    public function setup($config) {
-
-        $this->addElement('basefont', 'Inline', 'Empty', false, array(
-            'color' => 'Color',
-            'face' => 'Text', // extremely broad, we should
-            'size' => 'Text', // tighten it
-            'id' => 'ID'
-        ));
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $this->addElement(
+            'basefont',
+            'Inline',
+            'Empty',
+            null,
+            array(
+                'color' => 'Color',
+                'face' => 'Text', // extremely broad, we should
+                'size' => 'Text', // tighten it
+                'id' => 'ID'
+            )
+        );
         $this->addElement('center', 'Block', 'Flow', 'Common');
-        $this->addElement('dir', 'Block', 'Required: li', 'Common', array(
-            'compact' => 'Bool#compact'
-        ));
-        $this->addElement('font', 'Inline', 'Inline', array('Core', 'I18N'), array(
-            'color' => 'Color',
-            'face' => 'Text', // extremely broad, we should
-            'size' => 'Text', // tighten it
-        ));
-        $this->addElement('menu', 'Block', 'Required: li', 'Common', array(
-            'compact' => 'Bool#compact'
-        ));
+        $this->addElement(
+            'dir',
+            'Block',
+            'Required: li',
+            'Common',
+            array(
+                'compact' => 'Bool#compact'
+            )
+        );
+        $this->addElement(
+            'font',
+            'Inline',
+            'Inline',
+            array('Core', 'I18N'),
+            array(
+                'color' => 'Color',
+                'face' => 'Text', // extremely broad, we should
+                'size' => 'Text', // tighten it
+            )
+        );
+        $this->addElement(
+            'menu',
+            'Block',
+            'Required: li',
+            'Common',
+            array(
+                'compact' => 'Bool#compact'
+            )
+        );
 
         $s = $this->addElement('s', 'Inline', 'Inline', 'Common');
         $s->formatting = true;
@@ -89,7 +118,7 @@ class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
         $hr->attr['width'] = 'Length';
 
         $img = $this->addBlankElement('img');
-        $img->attr['align'] = 'Enum#top,middle,bottom,left,right';
+        $img->attr['align'] = 'IAlign';
         $img->attr['border'] = 'Pixels';
         $img->attr['hspace'] = 'Pixels';
         $img->attr['vspace'] = 'Pixels';
@@ -98,7 +127,7 @@ class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
 
         $li = $this->addBlankElement('li');
         $li->attr['value'] = new HTMLPurifier_AttrDef_Integer();
-        $li->attr['type']  = 'Enum#s:1,i,I,a,A,disc,square,circle';
+        $li->attr['type'] = 'Enum#s:1,i,I,a,A,disc,square,circle';
 
         $ol = $this->addBlankElement('ol');
         $ol->attr['compact'] = 'Bool#compact';
@@ -136,8 +165,22 @@ class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
         $ul->attr['compact'] = 'Bool#compact';
         $ul->attr['type'] = 'Enum#square,disc,circle';
 
-    }
+        // "safe" modifications to "unsafe" elements
+        // WARNING: If you want to add support for an unsafe, legacy
+        // attribute, make a new TrustedLegacy module with the trusted
+        // bit set appropriately
 
+        $form = $this->addBlankElement('form');
+        $form->content_model = 'Flow | #PCDATA';
+        $form->content_model_type = 'optional';
+        $form->attr['target'] = 'FrameTarget';
+
+        $input = $this->addBlankElement('input');
+        $input->attr['align'] = 'IAlign';
+
+        $legend = $this->addBlankElement('legend');
+        $legend->attr['align'] = 'LAlign';
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/List.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/List.php
similarity index 57%
rename from library/HTMLPurifier/HTMLModule/List.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/List.php
index 74d4522f4e..7a20ff701c 100644
--- a/library/HTMLPurifier/HTMLModule/List.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/List.php
@@ -5,7 +5,9 @@
  */
 class HTMLPurifier_HTMLModule_List extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'List';
 
     // According to the abstract schema, the List content set is a fully formed
@@ -17,13 +19,26 @@ class HTMLPurifier_HTMLModule_List extends HTMLPurifier_HTMLModule
     // we don't have support for such nested expressions without using
     // the incredibly inefficient and draconic Custom ChildDef.
 
+    /**
+     * @type array
+     */
     public $content_sets = array('Flow' => 'List');
 
-    public function setup($config) {
-        $ol = $this->addElement('ol', 'List', 'Required: li', 'Common');
-        $ol->wrap = "li";
-        $ul = $this->addElement('ul', 'List', 'Required: li', 'Common');
-        $ul->wrap = "li";
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $ol = $this->addElement('ol', 'List', new HTMLPurifier_ChildDef_List(), 'Common');
+        $ul = $this->addElement('ul', 'List', new HTMLPurifier_ChildDef_List(), 'Common');
+        // XXX The wrap attribute is handled by MakeWellFormed.  This is all
+        // quite unsatisfactory, because we generated this
+        // *specifically* for lists, and now a big chunk of the handling
+        // is done properly by the List ChildDef.  So actually, we just
+        // want enough information to make autoclosing work properly,
+        // and then hand off the tricky stuff to the ChildDef.
+        $ol->wrap = 'li';
+        $ul->wrap = 'li';
         $this->addElement('dl', 'List', 'Required: dt | dd', 'Common');
 
         $this->addElement('li', false, 'Flow', 'Common');
@@ -31,7 +46,6 @@ class HTMLPurifier_HTMLModule_List extends HTMLPurifier_HTMLModule
         $this->addElement('dd', false, 'Flow', 'Common');
         $this->addElement('dt', false, 'Inline', 'Common');
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Name.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Name.php
similarity index 65%
rename from library/HTMLPurifier/HTMLModule/Name.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Name.php
index 05694b4504..60c0545154 100644
--- a/library/HTMLPurifier/HTMLModule/Name.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Name.php
@@ -2,20 +2,25 @@
 
 class HTMLPurifier_HTMLModule_Name extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Name';
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $elements = array('a', 'applet', 'form', 'frame', 'iframe', 'img', 'map');
         foreach ($elements as $name) {
             $element = $this->addBlankElement($name);
             $element->attr['name'] = 'CDATA';
             if (!$config->get('HTML.Attr.Name.UseCDATA')) {
-                $element->attr_transform_post['NameSync'] = new HTMLPurifier_AttrTransform_NameSync();
+                $element->attr_transform_post[] = new HTMLPurifier_AttrTransform_NameSync();
             }
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Nofollow.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Nofollow.php
new file mode 100644
index 0000000000..dc9410a895
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Nofollow.php
@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * Module adds the nofollow attribute transformation to a tags.  It
+ * is enabled by HTML.Nofollow
+ */
+class HTMLPurifier_HTMLModule_Nofollow extends HTMLPurifier_HTMLModule
+{
+
+    /**
+     * @type string
+     */
+    public $name = 'Nofollow';
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $a = $this->addBlankElement('a');
+        $a->attr_transform_post[] = new HTMLPurifier_AttrTransform_Nofollow();
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
similarity index 79%
rename from library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
index 5f1b14abb8..da722253ac 100644
--- a/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
@@ -2,8 +2,14 @@
 
 class HTMLPurifier_HTMLModule_NonXMLCommonAttributes extends HTMLPurifier_HTMLModule
 {
+    /**
+     * @type string
+     */
     public $name = 'NonXMLCommonAttributes';
 
+    /**
+     * @type array
+     */
     public $attr_collections = array(
         'Lang' => array(
             'lang' => 'LanguageCode',
diff --git a/library/HTMLPurifier/HTMLModule/Object.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Object.php
similarity index 71%
rename from library/HTMLPurifier/HTMLModule/Object.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Object.php
index 193c1011f8..2f9efc5c88 100644
--- a/library/HTMLPurifier/HTMLModule/Object.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Object.php
@@ -7,13 +7,26 @@
  */
 class HTMLPurifier_HTMLModule_Object extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Object';
+
+    /**
+     * @type bool
+     */
     public $safe = false;
 
-    public function setup($config) {
-
-        $this->addElement('object', 'Inline', 'Optional: #PCDATA | Flow | param', 'Common',
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $this->addElement(
+            'object',
+            'Inline',
+            'Optional: #PCDATA | Flow | param',
+            'Common',
             array(
                 'archive' => 'URI',
                 'classid' => 'URI',
@@ -30,18 +43,20 @@ class HTMLPurifier_HTMLModule_Object extends HTMLPurifier_HTMLModule
             )
         );
 
-        $this->addElement('param', false, 'Empty', false,
+        $this->addElement(
+            'param',
+            false,
+            'Empty',
+            null,
             array(
                 'id' => 'ID',
                 'name*' => 'Text',
                 'type' => 'Text',
                 'value' => 'Text',
                 'valuetype' => 'Enum#data,ref,object'
-           )
+            )
         );
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Presentation.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Presentation.php
similarity index 52%
rename from library/HTMLPurifier/HTMLModule/Presentation.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Presentation.php
index 8ff0b5ed78..6458ce9d88 100644
--- a/library/HTMLPurifier/HTMLModule/Presentation.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Presentation.php
@@ -13,24 +13,30 @@
 class HTMLPurifier_HTMLModule_Presentation extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Presentation';
 
-    public function setup($config) {
-        $this->addElement('hr',     'Block',  'Empty',  'Common');
-        $this->addElement('sub',    'Inline', 'Inline', 'Common');
-        $this->addElement('sup',    'Inline', 'Inline', 'Common');
-        $b = $this->addElement('b',      'Inline', 'Inline', 'Common');
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $this->addElement('hr', 'Block', 'Empty', 'Common');
+        $this->addElement('sub', 'Inline', 'Inline', 'Common');
+        $this->addElement('sup', 'Inline', 'Inline', 'Common');
+        $b = $this->addElement('b', 'Inline', 'Inline', 'Common');
         $b->formatting = true;
-        $big = $this->addElement('big',    'Inline', 'Inline', 'Common');
+        $big = $this->addElement('big', 'Inline', 'Inline', 'Common');
         $big->formatting = true;
-        $i = $this->addElement('i',      'Inline', 'Inline', 'Common');
+        $i = $this->addElement('i', 'Inline', 'Inline', 'Common');
         $i->formatting = true;
-        $small = $this->addElement('small',  'Inline', 'Inline', 'Common');
+        $small = $this->addElement('small', 'Inline', 'Inline', 'Common');
         $small->formatting = true;
-        $tt = $this->addElement('tt',     'Inline', 'Inline', 'Common');
+        $tt = $this->addElement('tt', 'Inline', 'Inline', 'Common');
         $tt->formatting = true;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Proprietary.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Proprietary.php
similarity index 74%
rename from library/HTMLPurifier/HTMLModule/Proprietary.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Proprietary.php
index dd36a3de0e..5ee3c8e67f 100644
--- a/library/HTMLPurifier/HTMLModule/Proprietary.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Proprietary.php
@@ -6,12 +6,21 @@
  */
 class HTMLPurifier_HTMLModule_Proprietary extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Proprietary';
 
-    public function setup($config) {
-
-        $this->addElement('marquee', 'Inline', 'Flow', 'Common',
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $this->addElement(
+            'marquee',
+            'Inline',
+            'Flow',
+            'Common',
             array(
                 'direction' => 'Enum#left,right,up,down',
                 'behavior' => 'Enum#alternate',
@@ -25,9 +34,7 @@ class HTMLPurifier_HTMLModule_Proprietary extends HTMLPurifier_HTMLModule
                 'vspace' => 'Pixels',
             )
         );
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Ruby.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Ruby.php
similarity index 77%
rename from library/HTMLPurifier/HTMLModule/Ruby.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Ruby.php
index b26a0a30a0..a0d48924da 100644
--- a/library/HTMLPurifier/HTMLModule/Ruby.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Ruby.php
@@ -7,12 +7,22 @@
 class HTMLPurifier_HTMLModule_Ruby extends HTMLPurifier_HTMLModule
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Ruby';
 
-    public function setup($config) {
-        $this->addElement('ruby', 'Inline',
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $this->addElement(
+            'ruby',
+            'Inline',
             'Custom: ((rb, (rt | (rp, rt, rp))) | (rbc, rtc, rtc?))',
-            'Common');
+            'Common'
+        );
         $this->addElement('rbc', false, 'Required: rb', 'Common');
         $this->addElement('rtc', false, 'Required: rt', 'Common');
         $rb = $this->addElement('rb', false, 'Inline', 'Common');
@@ -21,7 +31,6 @@ class HTMLPurifier_HTMLModule_Ruby extends HTMLPurifier_HTMLModule
         $rt->excludes = array('ruby' => true);
         $this->addElement('rp', false, 'Optional: #PCDATA', 'Common');
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/SafeEmbed.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeEmbed.php
similarity index 74%
rename from library/HTMLPurifier/HTMLModule/SafeEmbed.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeEmbed.php
index ea256716bb..04e6689ea6 100644
--- a/library/HTMLPurifier/HTMLModule/SafeEmbed.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeEmbed.php
@@ -5,14 +5,22 @@
  */
 class HTMLPurifier_HTMLModule_SafeEmbed extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'SafeEmbed';
 
-    public function setup($config) {
-
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $max = $config->get('HTML.MaxImgLength');
         $embed = $this->addElement(
-            'embed', 'Inline', 'Empty', 'Common',
+            'embed',
+            'Inline',
+            'Empty',
+            'Common',
             array(
                 'src*' => 'URI#embedded',
                 'type' => 'Enum#application/x-shockwave-flash',
@@ -21,14 +29,12 @@ class HTMLPurifier_HTMLModule_SafeEmbed extends HTMLPurifier_HTMLModule
                 'allowscriptaccess' => 'Enum#never',
                 'allownetworking' => 'Enum#internal',
                 'flashvars' => 'Text',
-                'wmode' => 'Enum#window',
+                'wmode' => 'Enum#window,transparent,opaque',
                 'name' => 'ID',
             )
         );
         $embed->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeEmbed();
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/SafeObject.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeObject.php
similarity index 67%
rename from library/HTMLPurifier/HTMLModule/SafeObject.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeObject.php
index 64ab8c0703..1297f80a39 100644
--- a/library/HTMLPurifier/HTMLModule/SafeObject.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeObject.php
@@ -8,11 +8,16 @@
  */
 class HTMLPurifier_HTMLModule_SafeObject extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'SafeObject';
 
-    public function setup($config) {
-
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         // These definitions are not intrinsically safe: the attribute transforms
         // are a vital part of ensuring safety.
 
@@ -25,18 +30,24 @@ class HTMLPurifier_HTMLModule_SafeObject extends HTMLPurifier_HTMLModule
             array(
                 // While technically not required by the spec, we're forcing
                 // it to this value.
-                'type'   => 'Enum#application/x-shockwave-flash',
-                'width'  => 'Pixels#' . $max,
+                'type' => 'Enum#application/x-shockwave-flash',
+                'width' => 'Pixels#' . $max,
                 'height' => 'Pixels#' . $max,
-                'data'   => 'URI#embedded',
-                'classid' => 'Enum#clsid:d27cdb6e-ae6d-11cf-96b8-444553540000',
-                'codebase' => new HTMLPurifier_AttrDef_Enum(array(
-                    'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0')),
+                'data' => 'URI#embedded',
+                'codebase' => new HTMLPurifier_AttrDef_Enum(
+                    array(
+                        'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0'
+                    )
+                ),
             )
         );
         $object->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeObject();
 
-        $param = $this->addElement('param', false, 'Empty', false,
+        $param = $this->addElement(
+            'param',
+            false,
+            'Empty',
+            false,
             array(
                 'id' => 'ID',
                 'name*' => 'Text',
@@ -45,9 +56,7 @@ class HTMLPurifier_HTMLModule_SafeObject extends HTMLPurifier_HTMLModule
         );
         $param->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeParam();
         $this->info_injector[] = 'SafeObject';
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeScripting.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeScripting.php
new file mode 100644
index 0000000000..0330cd97f8
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeScripting.php
@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * A "safe" script module. No inline JS is allowed, and pointed to JS
+ * files must match whitelist.
+ */
+class HTMLPurifier_HTMLModule_SafeScripting extends HTMLPurifier_HTMLModule
+{
+    /**
+     * @type string
+     */
+    public $name = 'SafeScripting';
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        // These definitions are not intrinsically safe: the attribute transforms
+        // are a vital part of ensuring safety.
+
+        $allowed = $config->get('HTML.SafeScripting');
+        $script = $this->addElement(
+            'script',
+            'Inline',
+            'Empty',
+            null,
+            array(
+                // While technically not required by the spec, we're forcing
+                // it to this value.
+                'type' => 'Enum#text/javascript',
+                'src*' => new HTMLPurifier_AttrDef_Enum(array_keys($allowed))
+            )
+        );
+        $script->attr_transform_pre[] =
+        $script->attr_transform_post[] = new HTMLPurifier_AttrTransform_ScriptRequired();
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Scripting.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Scripting.php
similarity index 76%
rename from library/HTMLPurifier/HTMLModule/Scripting.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Scripting.php
index cecdea6c30..8b28a7b7ea 100644
--- a/library/HTMLPurifier/HTMLModule/Scripting.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Scripting.php
@@ -15,12 +15,31 @@ INSIDE HTML PURIFIER DOCUMENTS. USE ONLY WITH TRUSTED USER INPUT!!!
  */
 class HTMLPurifier_HTMLModule_Scripting extends HTMLPurifier_HTMLModule
 {
+    /**
+     * @type string
+     */
     public $name = 'Scripting';
+
+    /**
+     * @type array
+     */
     public $elements = array('script', 'noscript');
+
+    /**
+     * @type array
+     */
     public $content_sets = array('Block' => 'script | noscript', 'Inline' => 'script | noscript');
+
+    /**
+     * @type bool
+     */
     public $safe = false;
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         // TODO: create custom child-definition for noscript that
         // auto-wraps stray #PCDATA in a similar manner to
         // blockquote's custom definition (we would use it but
@@ -33,20 +52,20 @@ class HTMLPurifier_HTMLModule_Scripting extends HTMLPurifier_HTMLModule
         // In theory, this could be safe, but I don't see any reason to
         // allow it.
         $this->info['noscript'] = new HTMLPurifier_ElementDef();
-        $this->info['noscript']->attr = array( 0 => array('Common') );
+        $this->info['noscript']->attr = array(0 => array('Common'));
         $this->info['noscript']->content_model = 'Heading | List | Block';
         $this->info['noscript']->content_model_type = 'required';
 
         $this->info['script'] = new HTMLPurifier_ElementDef();
         $this->info['script']->attr = array(
             'defer' => new HTMLPurifier_AttrDef_Enum(array('defer')),
-            'src'   => new HTMLPurifier_AttrDef_URI(true),
-            'type'  => new HTMLPurifier_AttrDef_Enum(array('text/javascript'))
+            'src' => new HTMLPurifier_AttrDef_URI(true),
+            'type' => new HTMLPurifier_AttrDef_Enum(array('text/javascript'))
         );
         $this->info['script']->content_model = '#PCDATA';
         $this->info['script']->content_model_type = 'optional';
-        $this->info['script']->attr_transform_pre['type'] =
-        $this->info['script']->attr_transform_post['type'] =
+        $this->info['script']->attr_transform_pre[] =
+        $this->info['script']->attr_transform_post[] =
             new HTMLPurifier_AttrTransform_ScriptRequired();
     }
 }
diff --git a/library/HTMLPurifier/HTMLModule/StyleAttribute.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/StyleAttribute.php
similarity index 78%
rename from library/HTMLPurifier/HTMLModule/StyleAttribute.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/StyleAttribute.php
index eb78464cc0..497b832ae2 100644
--- a/library/HTMLPurifier/HTMLModule/StyleAttribute.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/StyleAttribute.php
@@ -6,8 +6,14 @@
  */
 class HTMLPurifier_HTMLModule_StyleAttribute extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'StyleAttribute';
+
+    /**
+     * @type array
+     */
     public $attr_collections = array(
         // The inclusion routine differs from the Abstract Modules but
         // is in line with the DTD and XML Schemas.
@@ -15,10 +21,13 @@ class HTMLPurifier_HTMLModule_StyleAttribute extends HTMLPurifier_HTMLModule
         'Core' => array(0 => array('Style'))
     );
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $this->attr_collections['Style']['style'] = new HTMLPurifier_AttrDef_CSS();
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tables.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
similarity index 75%
rename from library/HTMLPurifier/HTMLModule/Tables.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
index f314ced3f8..8a0b3b4616 100644
--- a/library/HTMLPurifier/HTMLModule/Tables.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
@@ -5,15 +5,23 @@
  */
 class HTMLPurifier_HTMLModule_Tables extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Tables';
 
-    public function setup($config) {
-
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $this->addElement('caption', false, 'Inline', 'Common');
 
-        $this->addElement('table', 'Block',
-            new HTMLPurifier_ChildDef_Table(),  'Common',
+        $this->addElement(
+            'table',
+            'Block',
+            new HTMLPurifier_ChildDef_Table(),
+            'Common',
             array(
                 'border' => 'Pixels',
                 'cellpadding' => 'Length',
@@ -34,9 +42,12 @@ class HTMLPurifier_HTMLModule_Tables extends HTMLPurifier_HTMLModule
 
         $cell_t = array_merge(
             array(
-                'abbr'    => 'Text',
+                'abbr' => 'Text',
                 'colspan' => 'Number',
                 'rowspan' => 'Number',
+                // Apparently, as of HTML5 this attribute only applies
+                // to 'th' elements.
+                'scope' => 'Enum#row,col,rowgroup,colgroup',
             ),
             $cell_align
         );
@@ -47,20 +58,18 @@ class HTMLPurifier_HTMLModule_Tables extends HTMLPurifier_HTMLModule
 
         $cell_col = array_merge(
             array(
-                'span'  => 'Number',
+                'span' => 'Number',
                 'width' => 'MultiLength',
             ),
             $cell_align
         );
-        $this->addElement('col',      false, 'Empty',         'Common', $cell_col);
+        $this->addElement('col', false, 'Empty', 'Common', $cell_col);
         $this->addElement('colgroup', false, 'Optional: col', 'Common', $cell_col);
 
         $this->addElement('tbody', false, 'Required: tr', 'Common', $cell_align);
         $this->addElement('thead', false, 'Required: tr', 'Common', $cell_align);
         $this->addElement('tfoot', false, 'Required: tr', 'Common', $cell_align);
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Target.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Target.php
similarity index 77%
rename from library/HTMLPurifier/HTMLModule/Target.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Target.php
index 2b844ecc45..b188ac9369 100644
--- a/library/HTMLPurifier/HTMLModule/Target.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Target.php
@@ -5,10 +5,16 @@
  */
 class HTMLPurifier_HTMLModule_Target extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Target';
 
-    public function setup($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         $elements = array('a');
         foreach ($elements as $name) {
             $e = $this->addBlankElement($name);
@@ -17,7 +23,6 @@ class HTMLPurifier_HTMLModule_Target extends HTMLPurifier_HTMLModule
             );
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/TargetBlank.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/TargetBlank.php
new file mode 100644
index 0000000000..58ccc68941
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/TargetBlank.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * Module adds the target=blank attribute transformation to a tags.  It
+ * is enabled by HTML.TargetBlank
+ */
+class HTMLPurifier_HTMLModule_TargetBlank extends HTMLPurifier_HTMLModule
+{
+    /**
+     * @type string
+     */
+    public $name = 'TargetBlank';
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
+        $a = $this->addBlankElement('a');
+        $a->attr_transform_post[] = new HTMLPurifier_AttrTransform_TargetBlank();
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Text.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Text.php
similarity index 58%
rename from library/HTMLPurifier/HTMLModule/Text.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Text.php
index ae77c71886..7a65e0048f 100644
--- a/library/HTMLPurifier/HTMLModule/Text.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Text.php
@@ -14,43 +14,59 @@
  */
 class HTMLPurifier_HTMLModule_Text extends HTMLPurifier_HTMLModule
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Text';
+
+    /**
+     * @type array
+     */
     public $content_sets = array(
         'Flow' => 'Heading | Block | Inline'
     );
 
-    public function setup($config) {
-
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config)
+    {
         // Inline Phrasal -------------------------------------------------
-        $this->addElement('abbr',    'Inline', 'Inline', 'Common');
+        $this->addElement('abbr', 'Inline', 'Inline', 'Common');
         $this->addElement('acronym', 'Inline', 'Inline', 'Common');
-        $this->addElement('cite',    'Inline', 'Inline', 'Common');
-        $this->addElement('dfn',     'Inline', 'Inline', 'Common');
-        $this->addElement('kbd',     'Inline', 'Inline', 'Common');
-        $this->addElement('q',       'Inline', 'Inline', 'Common', array('cite' => 'URI'));
-        $this->addElement('samp',    'Inline', 'Inline', 'Common');
-        $this->addElement('var',     'Inline', 'Inline', 'Common');
+        $this->addElement('cite', 'Inline', 'Inline', 'Common');
+        $this->addElement('dfn', 'Inline', 'Inline', 'Common');
+        $this->addElement('kbd', 'Inline', 'Inline', 'Common');
+        $this->addElement('q', 'Inline', 'Inline', 'Common', array('cite' => 'URI'));
+        $this->addElement('samp', 'Inline', 'Inline', 'Common');
+        $this->addElement('var', 'Inline', 'Inline', 'Common');
 
-        $em = $this->addElement('em',      'Inline', 'Inline', 'Common');
+        $em = $this->addElement('em', 'Inline', 'Inline', 'Common');
         $em->formatting = true;
 
-        $strong = $this->addElement('strong',  'Inline', 'Inline', 'Common');
+        $strong = $this->addElement('strong', 'Inline', 'Inline', 'Common');
         $strong->formatting = true;
 
-        $code = $this->addElement('code',    'Inline', 'Inline', 'Common');
+        $code = $this->addElement('code', 'Inline', 'Inline', 'Common');
         $code->formatting = true;
 
         // Inline Structural ----------------------------------------------
         $this->addElement('span', 'Inline', 'Inline', 'Common');
-        $this->addElement('br',   'Inline', 'Empty',  'Core');
+        $this->addElement('br', 'Inline', 'Empty', 'Core');
 
         // Block Phrasal --------------------------------------------------
-        $this->addElement('address',     'Block', 'Inline', 'Common');
-        $this->addElement('blockquote',  'Block', 'Optional: Heading | Block | List', 'Common', array('cite' => 'URI') );
+        $this->addElement('address', 'Block', 'Inline', 'Common');
+        $this->addElement('blockquote', 'Block', 'Optional: Heading | Block | List', 'Common', array('cite' => 'URI'));
         $pre = $this->addElement('pre', 'Block', 'Inline', 'Common');
         $pre->excludes = $this->makeLookup(
-            'img', 'big', 'small', 'object', 'applet', 'font', 'basefont' );
+            'img',
+            'big',
+            'small',
+            'object',
+            'applet',
+            'font',
+            'basefont'
+        );
         $this->addElement('h1', 'Heading', 'Inline', 'Common');
         $this->addElement('h2', 'Heading', 'Inline', 'Common');
         $this->addElement('h3', 'Heading', 'Inline', 'Common');
@@ -60,12 +76,12 @@ class HTMLPurifier_HTMLModule_Text extends HTMLPurifier_HTMLModule
 
         // Block Structural -----------------------------------------------
         $p = $this->addElement('p', 'Block', 'Inline', 'Common');
-        $p->autoclose = array_flip(array("address", "blockquote", "center", "dir", "div", "dl", "fieldset", "ol", "p", "ul"));
+        $p->autoclose = array_flip(
+            array("address", "blockquote", "center", "dir", "div", "dl", "fieldset", "ol", "p", "ul")
+        );
 
         $this->addElement('div', 'Block', 'Flow', 'Common');
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tidy.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy.php
similarity index 78%
rename from library/HTMLPurifier/HTMLModule/Tidy.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy.php
index 21783f18eb..08aa232470 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy.php
@@ -7,36 +7,41 @@
  */
 class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
 {
-
     /**
-     * List of supported levels. Index zero is a special case "no fixes"
-     * level.
+     * List of supported levels.
+     * Index zero is a special case "no fixes" level.
+     * @type array
      */
     public $levels = array(0 => 'none', 'light', 'medium', 'heavy');
 
     /**
-     * Default level to place all fixes in. Disabled by default
+     * Default level to place all fixes in.
+     * Disabled by default.
+     * @type string
      */
     public $defaultLevel = null;
 
     /**
-     * Lists of fixes used by getFixesForLevel(). Format is:
+     * Lists of fixes used by getFixesForLevel().
+     * Format is:
      *      HTMLModule_Tidy->fixesForLevel[$level] = array('fix-1', 'fix-2');
+     * @type array
      */
     public $fixesForLevel = array(
-        'light'  => array(),
+        'light' => array(),
         'medium' => array(),
-        'heavy'  => array()
+        'heavy' => array()
     );
 
     /**
      * Lazy load constructs the module by determining the necessary
      * fixes to create and then delegating to the populate() function.
+     * @param HTMLPurifier_Config $config
      * @todo Wildcard matching and error reporting when an added or
      *       subtracted fix has no effect.
      */
-    public function setup($config) {
-
+    public function setup($config)
+    {
         // create fixes, initialize fixesForLevel
         $fixes = $this->makeFixes();
         $this->makeFixesForLevel($fixes);
@@ -46,38 +51,38 @@ class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
         $fixes_lookup = $this->getFixesForLevel($level);
 
         // get custom fix declarations: these need namespace processing
-        $add_fixes    = $config->get('HTML.TidyAdd');
+        $add_fixes = $config->get('HTML.TidyAdd');
         $remove_fixes = $config->get('HTML.TidyRemove');
 
         foreach ($fixes as $name => $fix) {
             // needs to be refactored a little to implement globbing
-            if (
-                isset($remove_fixes[$name]) ||
-                (!isset($add_fixes[$name]) && !isset($fixes_lookup[$name]))
-            ) {
+            if (isset($remove_fixes[$name]) ||
+                (!isset($add_fixes[$name]) && !isset($fixes_lookup[$name]))) {
                 unset($fixes[$name]);
             }
         }
 
         // populate this module with necessary fixes
         $this->populate($fixes);
-
     }
 
     /**
      * Retrieves all fixes per a level, returning fixes for that specific
      * level as well as all levels below it.
-     * @param $level String level identifier, see $levels for valid values
-     * @return Lookup up table of fixes
+     * @param string $level level identifier, see $levels for valid values
+     * @return array Lookup up table of fixes
      */
-    public function getFixesForLevel($level) {
+    public function getFixesForLevel($level)
+    {
         if ($level == $this->levels[0]) {
             return array();
         }
         $activated_levels = array();
         for ($i = 1, $c = count($this->levels); $i < $c; $i++) {
             $activated_levels[] = $this->levels[$i];
-            if ($this->levels[$i] == $level) break;
+            if ($this->levels[$i] == $level) {
+                break;
+            }
         }
         if ($i == $c) {
             trigger_error(
@@ -99,9 +104,13 @@ class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
      * Dynamically populates the $fixesForLevel member variable using
      * the fixes array. It may be custom overloaded, used in conjunction
      * with $defaultLevel, or not used at all.
+     * @param array $fixes
      */
-    public function makeFixesForLevel($fixes) {
-        if (!isset($this->defaultLevel)) return;
+    public function makeFixesForLevel($fixes)
+    {
+        if (!isset($this->defaultLevel)) {
+            return;
+        }
         if (!isset($this->fixesForLevel[$this->defaultLevel])) {
             trigger_error(
                 'Default level ' . $this->defaultLevel . ' does not exist',
@@ -115,9 +124,10 @@ class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
     /**
      * Populates the module with transforms and other special-case code
      * based on a list of fixes passed to it
-     * @param $lookup Lookup table of fixes to activate
+     * @param array $fixes Lookup table of fixes to activate
      */
-    public function populate($fixes) {
+    public function populate($fixes)
+    {
         foreach ($fixes as $name => $fix) {
             // determine what the fix is for
             list($type, $params) = $this->getFixType($name);
@@ -169,20 +179,31 @@ class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
      * @note $fix_parameters is type dependant, see populate() for usage
      *       of these parameters
      */
-    public function getFixType($name) {
+    public function getFixType($name)
+    {
         // parse it
         $property = $attr = null;
-        if (strpos($name, '#') !== false) list($name, $property) = explode('#', $name);
-        if (strpos($name, '@') !== false) list($name, $attr)     = explode('@', $name);
+        if (strpos($name, '#') !== false) {
+            list($name, $property) = explode('#', $name);
+        }
+        if (strpos($name, '@') !== false) {
+            list($name, $attr) = explode('@', $name);
+        }
 
         // figure out the parameters
         $params = array();
-        if ($name !== '')    $params['element'] = $name;
-        if (!is_null($attr)) $params['attr'] = $attr;
+        if ($name !== '') {
+            $params['element'] = $name;
+        }
+        if (!is_null($attr)) {
+            $params['attr'] = $attr;
+        }
 
         // special case: attribute transform
         if (!is_null($attr)) {
-            if (is_null($property)) $property = 'pre';
+            if (is_null($property)) {
+                $property = 'pre';
+            }
             $type = 'attr_transform_' . $property;
             return array($type, $params);
         }
@@ -199,9 +220,11 @@ class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
     /**
      * Defines all fixes the module will perform in a compact
      * associative array of fix name to fix implementation.
+     * @return array
      */
-    public function makeFixes() {}
-
+    public function makeFixes()
+    {
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/Name.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Name.php
similarity index 80%
rename from library/HTMLPurifier/HTMLModule/Tidy/Name.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Name.php
index 61ff85ce2f..a995161b28 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/Name.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Name.php
@@ -5,18 +5,27 @@
  */
 class HTMLPurifier_HTMLModule_Tidy_Name extends HTMLPurifier_HTMLModule_Tidy
 {
+    /**
+     * @type string
+     */
     public $name = 'Tidy_Name';
+
+    /**
+     * @type string
+     */
     public $defaultLevel = 'heavy';
-    public function makeFixes() {
 
+    /**
+     * @return array
+     */
+    public function makeFixes()
+    {
         $r = array();
-
         // @name for img, a -----------------------------------------------
         // Technically, it's allowed even on strict, so we allow authors to use
         // it. However, it's deprecated in future versions of XHTML.
         $r['img@name'] =
         $r['a@name'] = new HTMLPurifier_AttrTransform_Name();
-
         return $r;
     }
 }
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
similarity index 85%
rename from library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
index 14c15c4a06..3326438216 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
@@ -3,10 +3,21 @@
 class HTMLPurifier_HTMLModule_Tidy_Proprietary extends HTMLPurifier_HTMLModule_Tidy
 {
 
+    /**
+     * @type string
+     */
     public $name = 'Tidy_Proprietary';
+
+    /**
+     * @type string
+     */
     public $defaultLevel = 'light';
 
-    public function makeFixes() {
+    /**
+     * @return array
+     */
+    public function makeFixes()
+    {
         $r = array();
         $r['table@background'] = new HTMLPurifier_AttrTransform_Background();
         $r['td@background']    = new HTMLPurifier_AttrTransform_Background();
@@ -18,7 +29,6 @@ class HTMLPurifier_HTMLModule_Tidy_Proprietary extends HTMLPurifier_HTMLModule_T
         $r['table@height']     = new HTMLPurifier_AttrTransform_Length('height');
         return $r;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Strict.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Strict.php
new file mode 100644
index 0000000000..803c44fabd
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Strict.php
@@ -0,0 +1,43 @@
+<?php
+
+class HTMLPurifier_HTMLModule_Tidy_Strict extends HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4
+{
+    /**
+     * @type string
+     */
+    public $name = 'Tidy_Strict';
+
+    /**
+     * @type string
+     */
+    public $defaultLevel = 'light';
+
+    /**
+     * @return array
+     */
+    public function makeFixes()
+    {
+        $r = parent::makeFixes();
+        $r['blockquote#content_model_type'] = 'strictblockquote';
+        return $r;
+    }
+
+    /**
+     * @type bool
+     */
+    public $defines_child_def = true;
+
+    /**
+     * @param HTMLPurifier_ElementDef $def
+     * @return HTMLPurifier_ChildDef_StrictBlockquote
+     */
+    public function getChildDef($def)
+    {
+        if ($def->content_model_type != 'strictblockquote') {
+            return parent::getChildDef($def);
+        }
+        return new HTMLPurifier_ChildDef_StrictBlockquote($def->content_model);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/Transitional.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Transitional.php
similarity index 74%
rename from library/HTMLPurifier/HTMLModule/Tidy/Transitional.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Transitional.php
index 9960b1dd10..c095ad9745 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/Transitional.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/Transitional.php
@@ -2,7 +2,14 @@
 
 class HTMLPurifier_HTMLModule_Tidy_Transitional extends HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4
 {
+    /**
+     * @type string
+     */
     public $name = 'Tidy_Transitional';
+
+    /**
+     * @type string
+     */
     public $defaultLevel = 'heavy';
 }
 
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/XHTML.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTML.php
similarity index 66%
rename from library/HTMLPurifier/HTMLModule/Tidy/XHTML.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTML.php
index db5a378e53..3ecddc434b 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/XHTML.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTML.php
@@ -2,16 +2,25 @@
 
 class HTMLPurifier_HTMLModule_Tidy_XHTML extends HTMLPurifier_HTMLModule_Tidy
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Tidy_XHTML';
+
+    /**
+     * @type string
+     */
     public $defaultLevel = 'medium';
 
-    public function makeFixes() {
+    /**
+     * @return array
+     */
+    public function makeFixes()
+    {
         $r = array();
         $r['@lang'] = new HTMLPurifier_AttrTransform_Lang();
         return $r;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
similarity index 50%
rename from library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
index 02e9438139..c4f16a4dc9 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
@@ -3,69 +3,86 @@
 class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule_Tidy
 {
 
-    public function makeFixes() {
-
+    /**
+     * @return array
+     */
+    public function makeFixes()
+    {
         $r = array();
 
         // == deprecated tag transforms ===================================
 
-        $r['font']   = new HTMLPurifier_TagTransform_Font();
-        $r['menu']   = new HTMLPurifier_TagTransform_Simple('ul');
-        $r['dir']    = new HTMLPurifier_TagTransform_Simple('ul');
-        $r['center'] = new HTMLPurifier_TagTransform_Simple('div',  'text-align:center;');
-        $r['u']      = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:underline;');
-        $r['s']      = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:line-through;');
+        $r['font'] = new HTMLPurifier_TagTransform_Font();
+        $r['menu'] = new HTMLPurifier_TagTransform_Simple('ul');
+        $r['dir'] = new HTMLPurifier_TagTransform_Simple('ul');
+        $r['center'] = new HTMLPurifier_TagTransform_Simple('div', 'text-align:center;');
+        $r['u'] = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:underline;');
+        $r['s'] = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:line-through;');
         $r['strike'] = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:line-through;');
 
         // == deprecated attribute transforms =============================
 
         $r['caption@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                // we're following IE's behavior, not Firefox's, due
-                // to the fact that no one supports caption-side:right,
-                // W3C included (with CSS 2.1). This is a slightly
-                // unreasonable attribute!
-                'left'   => 'text-align:left;',
-                'right'  => 'text-align:right;',
-                'top'    => 'caption-side:top;',
-                'bottom' => 'caption-side:bottom;' // not supported by IE
-            ));
+            new HTMLPurifier_AttrTransform_EnumToCSS(
+                'align',
+                array(
+                    // we're following IE's behavior, not Firefox's, due
+                    // to the fact that no one supports caption-side:right,
+                    // W3C included (with CSS 2.1). This is a slightly
+                    // unreasonable attribute!
+                    'left' => 'text-align:left;',
+                    'right' => 'text-align:right;',
+                    'top' => 'caption-side:top;',
+                    'bottom' => 'caption-side:bottom;' // not supported by IE
+                )
+            );
 
         // @align for img -------------------------------------------------
         $r['img@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                'left'   => 'float:left;',
-                'right'  => 'float:right;',
-                'top'    => 'vertical-align:top;',
-                'middle' => 'vertical-align:middle;',
-                'bottom' => 'vertical-align:baseline;',
-            ));
+            new HTMLPurifier_AttrTransform_EnumToCSS(
+                'align',
+                array(
+                    'left' => 'float:left;',
+                    'right' => 'float:right;',
+                    'top' => 'vertical-align:top;',
+                    'middle' => 'vertical-align:middle;',
+                    'bottom' => 'vertical-align:baseline;',
+                )
+            );
 
         // @align for table -----------------------------------------------
         $r['table@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                'left'   => 'float:left;',
-                'center' => 'margin-left:auto;margin-right:auto;',
-                'right'  => 'float:right;'
-            ));
+            new HTMLPurifier_AttrTransform_EnumToCSS(
+                'align',
+                array(
+                    'left' => 'float:left;',
+                    'center' => 'margin-left:auto;margin-right:auto;',
+                    'right' => 'float:right;'
+                )
+            );
 
         // @align for hr -----------------------------------------------
         $r['hr@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                // we use both text-align and margin because these work
-                // for different browsers (IE and Firefox, respectively)
-                // and the melange makes for a pretty cross-compatible
-                // solution
-                'left'   => 'margin-left:0;margin-right:auto;text-align:left;',
-                'center' => 'margin-left:auto;margin-right:auto;text-align:center;',
-                'right'  => 'margin-left:auto;margin-right:0;text-align:right;'
-            ));
+            new HTMLPurifier_AttrTransform_EnumToCSS(
+                'align',
+                array(
+                    // we use both text-align and margin because these work
+                    // for different browsers (IE and Firefox, respectively)
+                    // and the melange makes for a pretty cross-compatible
+                    // solution
+                    'left' => 'margin-left:0;margin-right:auto;text-align:left;',
+                    'center' => 'margin-left:auto;margin-right:auto;text-align:center;',
+                    'right' => 'margin-left:auto;margin-right:0;text-align:right;'
+                )
+            );
 
         // @align for h1, h2, h3, h4, h5, h6, p, div ----------------------
         // {{{
-            $align_lookup = array();
-            $align_values = array('left', 'right', 'center', 'justify');
-            foreach ($align_values as $v) $align_lookup[$v] = "text-align:$v;";
+        $align_lookup = array();
+        $align_values = array('left', 'right', 'center', 'justify');
+        foreach ($align_values as $v) {
+            $align_lookup[$v] = "text-align:$v;";
+        }
         // }}}
         $r['h1@align'] =
         $r['h2@align'] =
@@ -73,7 +90,7 @@ class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule
         $r['h4@align'] =
         $r['h5@align'] =
         $r['h6@align'] =
-        $r['p@align']  =
+        $r['p@align'] =
         $r['div@align'] =
             new HTMLPurifier_AttrTransform_EnumToCSS('align', $align_lookup);
 
@@ -88,12 +105,15 @@ class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule
 
         // @clear for br --------------------------------------------------
         $r['br@clear'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('clear', array(
-                'left'  => 'clear:left;',
-                'right' => 'clear:right;',
-                'all'   => 'clear:both;',
-                'none'  => 'clear:none;',
-            ));
+            new HTMLPurifier_AttrTransform_EnumToCSS(
+                'clear',
+                array(
+                    'left' => 'clear:left;',
+                    'right' => 'clear:right;',
+                    'all' => 'clear:both;',
+                    'none' => 'clear:none;',
+                )
+            );
 
         // @height for td, th ---------------------------------------------
         $r['td@height'] =
@@ -125,19 +145,19 @@ class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule
 
         // @type for li, ol, ul -------------------------------------------
         // {{{
-            $ul_types = array(
-                'disc'   => 'list-style-type:disc;',
-                'square' => 'list-style-type:square;',
-                'circle' => 'list-style-type:circle;'
-            );
-            $ol_types = array(
-                '1'   => 'list-style-type:decimal;',
-                'i'   => 'list-style-type:lower-roman;',
-                'I'   => 'list-style-type:upper-roman;',
-                'a'   => 'list-style-type:lower-alpha;',
-                'A'   => 'list-style-type:upper-alpha;'
-            );
-            $li_types = $ul_types + $ol_types;
+        $ul_types = array(
+            'disc' => 'list-style-type:disc;',
+            'square' => 'list-style-type:square;',
+            'circle' => 'list-style-type:circle;'
+        );
+        $ol_types = array(
+            '1' => 'list-style-type:decimal;',
+            'i' => 'list-style-type:lower-roman;',
+            'I' => 'list-style-type:upper-roman;',
+            'a' => 'list-style-type:lower-alpha;',
+            'A' => 'list-style-type:upper-alpha;'
+        );
+        $li_types = $ul_types + $ol_types;
         // }}}
 
         $r['ul@type'] = new HTMLPurifier_AttrTransform_EnumToCSS('type', $ul_types);
@@ -153,9 +173,7 @@ class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule
         $r['hr@width'] = new HTMLPurifier_AttrTransform_Length('width');
 
         return $r;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
similarity index 79%
rename from library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
index 9c0e031984..01dbe9deb6 100644
--- a/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
@@ -2,8 +2,14 @@
 
 class HTMLPurifier_HTMLModule_XMLCommonAttributes extends HTMLPurifier_HTMLModule
 {
+    /**
+     * @type string
+     */
     public $name = 'XMLCommonAttributes';
 
+    /**
+     * @type array
+     */
     public $attr_collections = array(
         'Lang' => array(
             'xml:lang' => 'LanguageCode',
diff --git a/library/HTMLPurifier/HTMLModuleManager.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModuleManager.php
similarity index 75%
rename from library/HTMLPurifier/HTMLModuleManager.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModuleManager.php
index f5c4a1d2cb..f3a17cb03b 100644
--- a/library/HTMLPurifier/HTMLModuleManager.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModuleManager.php
@@ -4,57 +4,75 @@ class HTMLPurifier_HTMLModuleManager
 {
 
     /**
-     * Instance of HTMLPurifier_DoctypeRegistry
+     * @type HTMLPurifier_DoctypeRegistry
      */
     public $doctypes;
 
     /**
-     * Instance of current doctype
+     * Instance of current doctype.
+     * @type string
      */
     public $doctype;
 
     /**
-     * Instance of HTMLPurifier_AttrTypes
+     * @type HTMLPurifier_AttrTypes
      */
     public $attrTypes;
 
     /**
      * Active instances of modules for the specified doctype are
      * indexed, by name, in this array.
+     * @type HTMLPurifier_HTMLModule[]
      */
     public $modules = array();
 
     /**
-     * Array of recognized HTMLPurifier_Module instances, indexed by
-     * module's class name. This array is usually lazy loaded, but a
+     * Array of recognized HTMLPurifier_HTMLModule instances,
+     * indexed by module's class name. This array is usually lazy loaded, but a
      * user can overload a module by pre-emptively registering it.
+     * @type HTMLPurifier_HTMLModule[]
      */
     public $registeredModules = array();
 
     /**
-     * List of extra modules that were added by the user using addModule().
-     * These get unconditionally merged into the current doctype, whatever
+     * List of extra modules that were added by the user
+     * using addModule(). These get unconditionally merged into the current doctype, whatever
      * it may be.
+     * @type HTMLPurifier_HTMLModule[]
      */
     public $userModules = array();
 
     /**
      * Associative array of element name to list of modules that have
      * definitions for the element; this array is dynamically filled.
+     * @type array
      */
     public $elementLookup = array();
 
-    /** List of prefixes we should use for registering small names */
+    /**
+     * List of prefixes we should use for registering small names.
+     * @type array
+     */
     public $prefixes = array('HTMLPurifier_HTMLModule_');
 
-    public $contentSets;     /**< Instance of HTMLPurifier_ContentSets */
-    public $attrCollections; /**< Instance of HTMLPurifier_AttrCollections */
+    /**
+     * @type HTMLPurifier_ContentSets
+     */
+    public $contentSets;
 
-    /** If set to true, unsafe elements and attributes will be allowed */
+    /**
+     * @type HTMLPurifier_AttrCollections
+     */
+    public $attrCollections;
+
+    /**
+     * If set to true, unsafe elements and attributes will be allowed.
+     * @type bool
+     */
     public $trusted = false;
 
-    public function __construct() {
-
+    public function __construct()
+    {
         // editable internal objects
         $this->attrTypes = new HTMLPurifier_AttrTypes();
         $this->doctypes  = new HTMLPurifier_DoctypeRegistry();
@@ -65,17 +83,18 @@ class HTMLPurifier_HTMLModuleManager
             'Presentation', 'Edit', 'Bdo', 'Tables', 'Image',
             'StyleAttribute',
             // Unsafe:
-            'Scripting', 'Object',  'Forms',
+            'Scripting', 'Object', 'Forms',
             // Sorta legacy, but present in strict:
             'Name',
         );
-        $transitional = array('Legacy', 'Target');
+        $transitional = array('Legacy', 'Target', 'Iframe');
         $xml = array('XMLCommonAttributes');
         $non_xml = array('NonXMLCommonAttributes');
 
         // setup basic doctypes
         $this->doctypes->register(
-            'HTML 4.01 Transitional', false,
+            'HTML 4.01 Transitional',
+            false,
             array_merge($common, $transitional, $non_xml),
             array('Tidy_Transitional', 'Tidy_Proprietary'),
             array(),
@@ -84,7 +103,8 @@ class HTMLPurifier_HTMLModuleManager
         );
 
         $this->doctypes->register(
-            'HTML 4.01 Strict', false,
+            'HTML 4.01 Strict',
+            false,
             array_merge($common, $non_xml),
             array('Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
             array(),
@@ -93,7 +113,8 @@ class HTMLPurifier_HTMLModuleManager
         );
 
         $this->doctypes->register(
-            'XHTML 1.0 Transitional', true,
+            'XHTML 1.0 Transitional',
+            true,
             array_merge($common, $transitional, $xml, $non_xml),
             array('Tidy_Transitional', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Name'),
             array(),
@@ -102,7 +123,8 @@ class HTMLPurifier_HTMLModuleManager
         );
 
         $this->doctypes->register(
-            'XHTML 1.0 Strict', true,
+            'XHTML 1.0 Strict',
+            true,
             array_merge($common, $xml, $non_xml),
             array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
             array(),
@@ -111,8 +133,11 @@ class HTMLPurifier_HTMLModuleManager
         );
 
         $this->doctypes->register(
-            'XHTML 1.1', true,
-            array_merge($common, $xml, array('Ruby')),
+            'XHTML 1.1',
+            true,
+            // Iframe is a real XHTML 1.1 module, despite being
+            // "transitional"!
+            array_merge($common, $xml, array('Ruby', 'Iframe')),
             array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Strict', 'Tidy_Name'), // Tidy_XHTML1_1
             array(),
             '-//W3C//DTD XHTML 1.1//EN',
@@ -142,7 +167,8 @@ class HTMLPurifier_HTMLModuleManager
      *       your module manually. All modules must have been included
      *       externally: registerModule will not perform inclusions for you!
      */
-    public function registerModule($module, $overload = false) {
+    public function registerModule($module, $overload = false)
+    {
         if (is_string($module)) {
             // attempt to load the module
             $original_module = $module;
@@ -157,8 +183,10 @@ class HTMLPurifier_HTMLModuleManager
             if (!$ok) {
                 $module = $original_module;
                 if (!class_exists($module)) {
-                    trigger_error($original_module . ' module does not exist',
-                        E_USER_ERROR);
+                    trigger_error(
+                        $original_module . ' module does not exist',
+                        E_USER_ERROR
+                    );
                     return;
                 }
             }
@@ -178,9 +206,12 @@ class HTMLPurifier_HTMLModuleManager
      * Adds a module to the current doctype by first registering it,
      * and then tacking it on to the active doctype
      */
-    public function addModule($module) {
+    public function addModule($module)
+    {
         $this->registerModule($module);
-        if (is_object($module)) $module = $module->name;
+        if (is_object($module)) {
+            $module = $module->name;
+        }
         $this->userModules[] = $module;
     }
 
@@ -188,17 +219,18 @@ class HTMLPurifier_HTMLModuleManager
      * Adds a class prefix that registerModule() will use to resolve a
      * string name to a concrete class
      */
-    public function addPrefix($prefix) {
+    public function addPrefix($prefix)
+    {
         $this->prefixes[] = $prefix;
     }
 
     /**
      * Performs processing on modules, after being called you may
      * use getElement() and getElements()
-     * @param $config Instance of HTMLPurifier_Config
+     * @param HTMLPurifier_Config $config
      */
-    public function setup($config) {
-
+    public function setup($config)
+    {
         $this->trusted = $config->get('HTML.Trusted');
 
         // generate
@@ -211,24 +243,34 @@ class HTMLPurifier_HTMLModuleManager
 
         if (is_array($lookup)) {
             foreach ($modules as $k => $m) {
-                if (isset($special_cases[$m])) continue;
-                if (!isset($lookup[$m])) unset($modules[$k]);
+                if (isset($special_cases[$m])) {
+                    continue;
+                }
+                if (!isset($lookup[$m])) {
+                    unset($modules[$k]);
+                }
             }
         }
 
-        // add proprietary module (this gets special treatment because
-        // it is completely removed from doctypes, etc.)
+        // custom modules
         if ($config->get('HTML.Proprietary')) {
             $modules[] = 'Proprietary';
         }
-
-        // add SafeObject/Safeembed modules
         if ($config->get('HTML.SafeObject')) {
             $modules[] = 'SafeObject';
         }
         if ($config->get('HTML.SafeEmbed')) {
             $modules[] = 'SafeEmbed';
         }
+        if ($config->get('HTML.SafeScripting') !== array()) {
+            $modules[] = 'SafeScripting';
+        }
+        if ($config->get('HTML.Nofollow')) {
+            $modules[] = 'Nofollow';
+        }
+        if ($config->get('HTML.TargetBlank')) {
+            $modules[] = 'TargetBlank';
+        }
 
         // merge in custom modules
         $modules = array_merge($modules, $this->userModules);
@@ -246,7 +288,7 @@ class HTMLPurifier_HTMLModuleManager
         // prepare any injectors
         foreach ($this->modules as $module) {
             $n = array();
-            foreach ($module->info_injector as $i => $injector) {
+            foreach ($module->info_injector as $injector) {
                 if (!is_object($injector)) {
                     $class = "HTMLPurifier_Injector_$injector";
                     $injector = new $class;
@@ -285,7 +327,8 @@ class HTMLPurifier_HTMLModuleManager
      * Takes a module and adds it to the active module collection,
      * registering it if necessary.
      */
-    public function processModule($module) {
+    public function processModule($module)
+    {
         if (!isset($this->registeredModules[$module]) || is_object($module)) {
             $this->registerModule($module);
         }
@@ -296,13 +339,17 @@ class HTMLPurifier_HTMLModuleManager
      * Retrieves merged element definitions.
      * @return Array of HTMLPurifier_ElementDef
      */
-    public function getElements() {
-
+    public function getElements()
+    {
         $elements = array();
         foreach ($this->modules as $module) {
-            if (!$this->trusted && !$module->safe) continue;
+            if (!$this->trusted && !$module->safe) {
+                continue;
+            }
             foreach ($module->info as $name => $v) {
-                if (isset($elements[$name])) continue;
+                if (isset($elements[$name])) {
+                    continue;
+                }
                 $elements[$name] = $this->getElement($name);
             }
         }
@@ -310,7 +357,9 @@ class HTMLPurifier_HTMLModuleManager
         // remove dud elements, this happens when an element that
         // appeared to be safe actually wasn't
         foreach ($elements as $n => $v) {
-            if ($v === false) unset($elements[$n]);
+            if ($v === false) {
+                unset($elements[$n]);
+            }
         }
 
         return $elements;
@@ -319,28 +368,29 @@ class HTMLPurifier_HTMLModuleManager
 
     /**
      * Retrieves a single merged element definition
-     * @param $name Name of element
-     * @param $trusted Boolean trusted overriding parameter: set to true
+     * @param string $name Name of element
+     * @param bool $trusted Boolean trusted overriding parameter: set to true
      *                 if you want the full version of an element
-     * @return Merged HTMLPurifier_ElementDef
+     * @return HTMLPurifier_ElementDef Merged HTMLPurifier_ElementDef
      * @note You may notice that modules are getting iterated over twice (once
      *       in getElements() and once here). This
      *       is because
      */
-    public function getElement($name, $trusted = null) {
-
+    public function getElement($name, $trusted = null)
+    {
         if (!isset($this->elementLookup[$name])) {
             return false;
         }
 
         // setup global state variables
         $def = false;
-        if ($trusted === null) $trusted = $this->trusted;
+        if ($trusted === null) {
+            $trusted = $this->trusted;
+        }
 
         // iterate through each module that has registered itself to this
         // element
-        foreach($this->elementLookup[$name] as $module_name) {
-
+        foreach ($this->elementLookup[$name] as $module_name) {
             $module = $this->modules[$module_name];
 
             // refuse to create/merge from a module that is deemed unsafe--
@@ -364,6 +414,13 @@ class HTMLPurifier_HTMLModuleManager
                 // :TODO:
                 // non-standalone definitions that don't have a standalone
                 // to merge into could be deferred to the end
+                // HOWEVER, it is perfectly valid for a non-standalone
+                // definition to lack a standalone definition, even
+                // after all processing: this allows us to safely
+                // specify extra attributes for elements that may not be
+                // enabled all in one place.  In particular, this might
+                // be the case for trusted elements.  WARNING: care must
+                // be taken that the /extra/ definitions are all safe.
                 continue;
             }
 
@@ -385,7 +442,9 @@ class HTMLPurifier_HTMLModuleManager
 
         // This can occur if there is a blank definition, but no base to
         // mix it in with
-        if (!$def) return false;
+        if (!$def) {
+            return false;
+        }
 
         // add information on required attributes
         foreach ($def->attr as $attr_name => $attr_def) {
@@ -393,11 +452,8 @@ class HTMLPurifier_HTMLModuleManager
                 $def->required_attr[] = $attr_name;
             }
         }
-
         return $def;
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/IDAccumulator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/IDAccumulator.php
similarity index 66%
rename from library/HTMLPurifier/IDAccumulator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/IDAccumulator.php
index 73215295a5..65c902c076 100644
--- a/library/HTMLPurifier/IDAccumulator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/IDAccumulator.php
@@ -17,11 +17,12 @@ class HTMLPurifier_IDAccumulator
 
     /**
      * Builds an IDAccumulator, also initializing the default blacklist
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Fully initialized HTMLPurifier_IDAccumulator
+     * @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config
+     * @param HTMLPurifier_Context $context Instance of HTMLPurifier_Context
+     * @return HTMLPurifier_IDAccumulator Fully initialized HTMLPurifier_IDAccumulator
      */
-    public static function build($config, $context) {
+    public static function build($config, $context)
+    {
         $id_accumulator = new HTMLPurifier_IDAccumulator();
         $id_accumulator->load($config->get('Attr.IDBlacklist'));
         return $id_accumulator;
@@ -29,11 +30,14 @@ class HTMLPurifier_IDAccumulator
 
     /**
      * Add an ID to the lookup table.
-     * @param $id ID to be added.
-     * @return Bool status, true if success, false if there's a dupe
+     * @param string $id ID to be added.
+     * @return bool status, true if success, false if there's a dupe
      */
-    public function add($id) {
-        if (isset($this->ids[$id])) return false;
+    public function add($id)
+    {
+        if (isset($this->ids[$id])) {
+            return false;
+        }
         return $this->ids[$id] = true;
     }
 
@@ -42,12 +46,12 @@ class HTMLPurifier_IDAccumulator
      * @param $array_of_ids Array of IDs to load
      * @note This function doesn't care about duplicates
      */
-    public function load($array_of_ids) {
+    public function load($array_of_ids)
+    {
         foreach ($array_of_ids as $id) {
             $this->ids[$id] = true;
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php
similarity index 55%
rename from library/HTMLPurifier/Injector.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php
index 5922f81305..5060eef9e2 100644
--- a/library/HTMLPurifier/Injector.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php
@@ -17,64 +17,71 @@ abstract class HTMLPurifier_Injector
 {
 
     /**
-     * Advisory name of injector, this is for friendly error messages
+     * Advisory name of injector, this is for friendly error messages.
+     * @type string
      */
     public $name;
 
     /**
-     * Instance of HTMLPurifier_HTMLDefinition
+     * @type HTMLPurifier_HTMLDefinition
      */
     protected $htmlDefinition;
 
     /**
      * Reference to CurrentNesting variable in Context. This is an array
      * list of tokens that we are currently "inside"
+     * @type array
      */
     protected $currentNesting;
 
     /**
-     * Reference to InputTokens variable in Context. This is an array
-     * list of the input tokens that are being processed.
+     * Reference to current token.
+     * @type HTMLPurifier_Token
      */
-    protected $inputTokens;
+    protected $currentToken;
 
     /**
-     * Reference to InputIndex variable in Context. This is an integer
-     * array index for $this->inputTokens that indicates what token
-     * is currently being processed.
+     * Reference to InputZipper variable in Context.
+     * @type HTMLPurifier_Zipper
      */
-    protected $inputIndex;
+    protected $inputZipper;
 
     /**
      * Array of elements and attributes this injector creates and therefore
      * need to be allowed by the definition. Takes form of
      * array('element' => array('attr', 'attr2'), 'element2')
+     * @type array
      */
     public $needed = array();
 
     /**
-     * Index of inputTokens to rewind to.
+     * Number of elements to rewind backwards (relative).
+     * @type bool|int
      */
-    protected $rewind = false;
+    protected $rewindOffset = false;
 
     /**
      * Rewind to a spot to re-perform processing. This is useful if you
      * deleted a node, and now need to see if this change affected any
      * earlier nodes. Rewinding does not affect other injectors, and can
      * result in infinite loops if not used carefully.
+     * @param bool|int $offset
      * @warning HTML Purifier will prevent you from fast-forwarding with this
      *          function.
      */
-    public function rewind($index) {
-        $this->rewind = $index;
+    public function rewindOffset($offset)
+    {
+        $this->rewindOffset = $offset;
     }
 
     /**
-     * Retrieves rewind, and then unsets it.
+     * Retrieves rewind offset, and then unsets it.
+     * @return bool|int
      */
-    public function getRewind() {
-        $r = $this->rewind;
-        $this->rewind = false;
+    public function getRewindOffset()
+    {
+        $r = $this->rewindOffset;
+        $this->rewindOffset = false;
         return $r;
     }
 
@@ -83,20 +90,23 @@ abstract class HTMLPurifier_Injector
      * this allows references to important variables to be made within
      * the injector. This function also checks if the HTML environment
      * will work with the Injector (see checkNeeded()).
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Boolean false if success, string of missing needed element/attribute if failure
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string Boolean false if success, string of missing needed element/attribute if failure
      */
-    public function prepare($config, $context) {
+    public function prepare($config, $context)
+    {
         $this->htmlDefinition = $config->getHTMLDefinition();
         // Even though this might fail, some unit tests ignore this and
         // still test checkNeeded, so be careful. Maybe get rid of that
         // dependency.
         $result = $this->checkNeeded($config);
-        if ($result !== false) return $result;
+        if ($result !== false) {
+            return $result;
+        }
         $this->currentNesting =& $context->get('CurrentNesting');
-        $this->inputTokens    =& $context->get('InputTokens');
-        $this->inputIndex     =& $context->get('InputIndex');
+        $this->currentToken   =& $context->get('CurrentToken');
+        $this->inputZipper    =& $context->get('InputZipper');
         return false;
     }
 
@@ -104,18 +114,26 @@ abstract class HTMLPurifier_Injector
      * This function checks if the HTML environment
      * will work with the Injector: if p tags are not allowed, the
      * Auto-Paragraphing injector should not be enabled.
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Boolean false if success, string of missing needed element/attribute if failure
+     * @param HTMLPurifier_Config $config
+     * @return bool|string Boolean false if success, string of missing needed element/attribute if failure
      */
-    public function checkNeeded($config) {
+    public function checkNeeded($config)
+    {
         $def = $config->getHTMLDefinition();
         foreach ($this->needed as $element => $attributes) {
-            if (is_int($element)) $element = $attributes;
-            if (!isset($def->info[$element])) return $element;
-            if (!is_array($attributes)) continue;
+            if (is_int($element)) {
+                $element = $attributes;
+            }
+            if (!isset($def->info[$element])) {
+                return $element;
+            }
+            if (!is_array($attributes)) {
+                continue;
+            }
             foreach ($attributes as $name) {
-                if (!isset($def->info[$element]->attr[$name])) return "$element.$name";
+                if (!isset($def->info[$element]->attr[$name])) {
+                    return "$element.$name";
+                }
             }
         }
         return false;
@@ -123,10 +141,11 @@ abstract class HTMLPurifier_Injector
 
     /**
      * Tests if the context node allows a certain element
-     * @param $name Name of element to test for
-     * @return True if element is allowed, false if it is not
+     * @param string $name Name of element to test for
+     * @return bool True if element is allowed, false if it is not
      */
-    public function allowsElement($name) {
+    public function allowsElement($name)
+    {
         if (!empty($this->currentNesting)) {
             $parent_token = array_pop($this->currentNesting);
             $this->currentNesting[] = $parent_token;
@@ -141,7 +160,9 @@ abstract class HTMLPurifier_Injector
         for ($i = count($this->currentNesting) - 2; $i >= 0; $i--) {
             $node = $this->currentNesting[$i];
             $def  = $this->htmlDefinition->info[$node->name];
-            if (isset($def->excludes[$name])) return false;
+            if (isset($def->excludes[$name])) {
+                return false;
+            }
         }
         return true;
     }
@@ -151,14 +172,22 @@ abstract class HTMLPurifier_Injector
      * you reach the end of the input tokens.
      * @warning Please prevent previous references from interfering with this
      *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @return bool
      */
-    protected function forward(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex + 1;
-        else $i++;
-        if (!isset($this->inputTokens[$i])) return false;
-        $current = $this->inputTokens[$i];
+    protected function forward(&$i, &$current)
+    {
+        if ($i === null) {
+            $i = count($this->inputZipper->back) - 1;
+        } else {
+            $i--;
+        }
+        if ($i < 0) {
+            return false;
+        }
+        $current = $this->inputZipper->back[$i];
         return true;
     }
 
@@ -166,14 +195,27 @@ abstract class HTMLPurifier_Injector
      * Similar to _forward, but accepts a third parameter $nesting (which
      * should be initialized at 0) and stops when we hit the end tag
      * for the node $this->inputIndex starts in.
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @param int $nesting
+     * @return bool
      */
-    protected function forwardUntilEndToken(&$i, &$current, &$nesting) {
+    protected function forwardUntilEndToken(&$i, &$current, &$nesting)
+    {
         $result = $this->forward($i, $current);
-        if (!$result) return false;
-        if ($nesting === null) $nesting = 0;
-        if     ($current instanceof HTMLPurifier_Token_Start) $nesting++;
-        elseif ($current instanceof HTMLPurifier_Token_End) {
-            if ($nesting <= 0) return false;
+        if (!$result) {
+            return false;
+        }
+        if ($nesting === null) {
+            $nesting = 0;
+        }
+        if ($current instanceof HTMLPurifier_Token_Start) {
+            $nesting++;
+        } elseif ($current instanceof HTMLPurifier_Token_End) {
+            if ($nesting <= 0) {
+                return false;
+            }
             $nesting--;
         }
         return true;
@@ -184,56 +226,56 @@ abstract class HTMLPurifier_Injector
      * you reach the beginning of input tokens.
      * @warning Please prevent previous references from interfering with this
      *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @return bool
      */
-    protected function backward(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex - 1;
-        else $i--;
-        if ($i < 0) return false;
-        $current = $this->inputTokens[$i];
+    protected function backward(&$i, &$current)
+    {
+        if ($i === null) {
+            $i = count($this->inputZipper->front) - 1;
+        } else {
+            $i--;
+        }
+        if ($i < 0) {
+            return false;
+        }
+        $current = $this->inputZipper->front[$i];
         return true;
     }
 
-    /**
-     * Initializes the iterator at the current position. Use in a do {} while;
-     * loop to force the _forward and _backward functions to start at the
-     * current location.
-     * @warning Please prevent previous references from interfering with this
-     *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
-     */
-    protected function current(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex;
-        $current = $this->inputTokens[$i];
-    }
-
     /**
      * Handler that is called when a text token is processed
      */
-    public function handleText(&$token) {}
+    public function handleText(&$token)
+    {
+    }
 
     /**
      * Handler that is called when a start or empty token is processed
      */
-    public function handleElement(&$token) {}
+    public function handleElement(&$token)
+    {
+    }
 
     /**
      * Handler that is called when an end token is processed
      */
-    public function handleEnd(&$token) {
+    public function handleEnd(&$token)
+    {
         $this->notifyEnd($token);
     }
 
     /**
      * Notifier that is called when an end token is processed
+     * @param HTMLPurifier_Token $token Current token variable.
      * @note This differs from handlers in that the token is read-only
      * @deprecated
      */
-    public function notifyEnd($token) {}
-
-
+    public function notifyEnd($token)
+    {
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector/AutoParagraph.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/AutoParagraph.php
similarity index 88%
rename from library/HTMLPurifier/Injector/AutoParagraph.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/AutoParagraph.php
index afa7608924..4afdd128d5 100644
--- a/library/HTMLPurifier/Injector/AutoParagraph.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/AutoParagraph.php
@@ -8,17 +8,31 @@
  */
 class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
 {
-
+    /**
+     * @type string
+     */
     public $name = 'AutoParagraph';
+
+    /**
+     * @type array
+     */
     public $needed = array('p');
 
-    private function _pStart() {
+    /**
+     * @return HTMLPurifier_Token_Start
+     */
+    private function _pStart()
+    {
         $par = new HTMLPurifier_Token_Start('p');
         $par->armor['MakeWellFormed_TagClosedError'] = true;
         return $par;
     }
 
-    public function handleText(&$token) {
+    /**
+     * @param HTMLPurifier_Token_Text $token
+     */
+    public function handleText(&$token)
+    {
         $text = $token->data;
         // Does the current parent allow <p> tags?
         if ($this->allowsElement('p')) {
@@ -72,11 +86,9 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
                     //                   ----
                 }
             }
-        // Is the current parent a <p> tag?
-        } elseif (
-            !empty($this->currentNesting) &&
-            $this->currentNesting[count($this->currentNesting)-1]->name == 'p'
-        ) {
+            // Is the current parent a <p> tag?
+        } elseif (!empty($this->currentNesting) &&
+            $this->currentNesting[count($this->currentNesting) - 1]->name == 'p') {
             // State 3.1: ...<p>PAR1
             //                  ----
 
@@ -84,7 +96,7 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
             //                  ------------
             $token = array();
             $this->_splitText($text, $token);
-        // Abort!
+            // Abort!
         } else {
             // State 4.1: ...<b>PAR1
             //                  ----
@@ -94,7 +106,11 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
         }
     }
 
-    public function handleElement(&$token) {
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleElement(&$token)
+    {
         // We don't have to check if we're already in a <p> tag for block
         // tokens, because the tag would have been autoclosed by MakeWellFormed.
         if ($this->allowsElement('p')) {
@@ -102,7 +118,6 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
                 if ($this->_isInline($token)) {
                     // State 1: <div>...<b>
                     //                  ---
-
                     // Check if this token is adjacent to the parent token
                     // (seek backwards until token isn't whitespace)
                     $i = null;
@@ -110,31 +125,24 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
 
                     if (!$prev instanceof HTMLPurifier_Token_Start) {
                         // Token wasn't adjacent
-
-                        if (
-                            $prev instanceof HTMLPurifier_Token_Text &&
+                        if ($prev instanceof HTMLPurifier_Token_Text &&
                             substr($prev->data, -2) === "\n\n"
                         ) {
                             // State 1.1.4: <div><p>PAR1</p>\n\n<b>
                             //                                  ---
-
                             // Quite frankly, this should be handled by splitText
                             $token = array($this->_pStart(), $token);
                         } else {
                             // State 1.1.1: <div><p>PAR1</p><b>
                             //                              ---
-
                             // State 1.1.2: <div><br /><b>
                             //                         ---
-
                             // State 1.1.3: <div>PAR<b>
                             //                      ---
                         }
-
                     } else {
                         // State 1.2.1: <div><b>
                         //                   ---
-
                         // Lookahead to see if <p> is needed.
                         if ($this->_pLookAhead()) {
                             // State 1.3.1: <div><b>PAR1\n\nPAR2
@@ -166,24 +174,20 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
 
                 $i = null;
                 if ($this->backward($i, $prev)) {
-                    if (
-                        !$prev instanceof HTMLPurifier_Token_Text
-                    ) {
+                    if (!$prev instanceof HTMLPurifier_Token_Text) {
                         // State 3.1.1: ...</p>{p}<b>
                         //                        ---
-
                         // State 3.2.1: ...</p><div>
                         //                     -----
-
-                        if (!is_array($token)) $token = array($token);
+                        if (!is_array($token)) {
+                            $token = array($token);
+                        }
                         array_unshift($token, new HTMLPurifier_Token_Text("\n\n"));
                     } else {
                         // State 3.1.2: ...</p>\n\n{p}<b>
                         //                            ---
-
                         // State 3.2.2: ...</p>\n\n<div>
                         //                         -----
-
                         // Note: PAR<ELEM> cannot occur because PAR would have been
                         // wrapped in <p> tags.
                     }
@@ -192,7 +196,6 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
         } else {
             // State 2.2: <ul><li>
             //                ----
-
             // State 2.4: <p><b>
             //               ---
         }
@@ -201,18 +204,17 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
     /**
      * Splits up a text in paragraph tokens and appends them
      * to the result stream that will replace the original
-     * @param $data String text data that will be processed
+     * @param string $data String text data that will be processed
      *    into paragraphs
-     * @param $result Reference to array of tokens that the
+     * @param HTMLPurifier_Token[] $result Reference to array of tokens that the
      *    tags will be appended onto
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
      */
-    private function _splitText($data, &$result) {
+    private function _splitText($data, &$result)
+    {
         $raw_paragraphs = explode("\n\n", $data);
-        $paragraphs  = array(); // without empty paragraphs
+        $paragraphs = array(); // without empty paragraphs
         $needs_start = false;
-        $needs_end   = false;
+        $needs_end = false;
 
         $c = count($raw_paragraphs);
         if ($c == 1) {
@@ -285,26 +287,33 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
             array_pop($result); // removes \n\n
             array_pop($result); // removes </p>
         }
-
     }
 
     /**
      * Returns true if passed token is inline (and, ergo, allowed in
      * paragraph tags)
+     * @param HTMLPurifier_Token $token
+     * @return bool
      */
-    private function _isInline($token) {
+    private function _isInline($token)
+    {
         return isset($this->htmlDefinition->info['p']->child->elements[$token->name]);
     }
 
     /**
      * Looks ahead in the token list and determines whether or not we need
      * to insert a <p> tag.
+     * @return bool
      */
-    private function _pLookAhead() {
-        $this->current($i, $current);
-        if ($current instanceof HTMLPurifier_Token_Start) $nesting = 1;
-        else $nesting = 0;
+    private function _pLookAhead()
+    {
+        if ($this->currentToken instanceof HTMLPurifier_Token_Start) {
+            $nesting = 1;
+        } else {
+            $nesting = 0;
+        }
         $ok = false;
+        $i = null;
         while ($this->forwardUntilEndToken($i, $current, $nesting)) {
             $result = $this->_checkNeedsP($current);
             if ($result !== null) {
@@ -318,9 +327,12 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
     /**
      * Determines if a particular token requires an earlier inline token
      * to get a paragraph. This should be used with _forwardUntilEndToken
+     * @param HTMLPurifier_Token $current
+     * @return bool
      */
-    private function _checkNeedsP($current) {
-        if ($current instanceof HTMLPurifier_Token_Start){
+    private function _checkNeedsP($current)
+    {
+        if ($current instanceof HTMLPurifier_Token_Start) {
             if (!$this->_isInline($current)) {
                 // <div>PAR1<div>
                 //      ----
@@ -339,7 +351,6 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
         }
         return null;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector/DisplayLinkURI.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/DisplayLinkURI.php
similarity index 64%
rename from library/HTMLPurifier/Injector/DisplayLinkURI.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/DisplayLinkURI.php
index 9dce9bd085..c19b1bc271 100644
--- a/library/HTMLPurifier/Injector/DisplayLinkURI.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/DisplayLinkURI.php
@@ -5,15 +5,29 @@
  */
 class HTMLPurifier_Injector_DisplayLinkURI extends HTMLPurifier_Injector
 {
-
+    /**
+     * @type string
+     */
     public $name = 'DisplayLinkURI';
+
+    /**
+     * @type array
+     */
     public $needed = array('a');
 
-    public function handleElement(&$token) {
+    /**
+     * @param $token
+     */
+    public function handleElement(&$token)
+    {
     }
 
-    public function handleEnd(&$token) {
-        if (isset($token->start->attr['href'])){
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleEnd(&$token)
+    {
+        if (isset($token->start->attr['href'])) {
             $url = $token->start->attr['href'];
             unset($token->start->attr['href']);
             $token = array($token, new HTMLPurifier_Token_Text(" ($url)"));
diff --git a/library/HTMLPurifier/Injector/Linkify.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/Linkify.php
similarity index 72%
rename from library/HTMLPurifier/Injector/Linkify.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/Linkify.php
index 296dac2829..069708c250 100644
--- a/library/HTMLPurifier/Injector/Linkify.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/Linkify.php
@@ -5,12 +5,24 @@
  */
 class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
 {
-
+    /**
+     * @type string
+     */
     public $name = 'Linkify';
+
+    /**
+     * @type array
+     */
     public $needed = array('a' => array('href'));
 
-    public function handleText(&$token) {
-        if (!$this->allowsElement('a')) return;
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleText(&$token)
+    {
+        if (!$this->allowsElement('a')) {
+            return;
+        }
 
         if (strpos($token->data, '://') === false) {
             // our really quick heuristic failed, abort
@@ -21,7 +33,8 @@ class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
 
         // there is/are URL(s). Let's split the string:
         // Note: this regex is extremely permissive
-        $bits = preg_split('#((?:https?|ftp)://[^\s\'"<>()]+)#S', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
+        $bits = preg_split('#((?:https?|ftp)://[^\s\'",<>()]+)#Su', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
+
 
         $token = array();
 
@@ -30,7 +43,9 @@ class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
         // $l = is link
         for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
             if (!$l) {
-                if ($bits[$i] === '') continue;
+                if ($bits[$i] === '') {
+                    continue;
+                }
                 $token[] = new HTMLPurifier_Token_Text($bits[$i]);
             } else {
                 $token[] = new HTMLPurifier_Token_Start('a', array('href' => $bits[$i]));
@@ -38,9 +53,7 @@ class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
                 $token[] = new HTMLPurifier_Token_End('a');
             }
         }
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector/PurifierLinkify.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/PurifierLinkify.php
similarity index 58%
rename from library/HTMLPurifier/Injector/PurifierLinkify.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/PurifierLinkify.php
index ad2455a91c..cb9046f334 100644
--- a/library/HTMLPurifier/Injector/PurifierLinkify.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/PurifierLinkify.php
@@ -6,19 +6,43 @@
  */
 class HTMLPurifier_Injector_PurifierLinkify extends HTMLPurifier_Injector
 {
-
+    /**
+     * @type string
+     */
     public $name = 'PurifierLinkify';
+
+    /**
+     * @type string
+     */
     public $docURL;
+
+    /**
+     * @type array
+     */
     public $needed = array('a' => array('href'));
 
-    public function prepare($config, $context) {
+    /**
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public function prepare($config, $context)
+    {
         $this->docURL = $config->get('AutoFormat.PurifierLinkify.DocURL');
         return parent::prepare($config, $context);
     }
 
-    public function handleText(&$token) {
-        if (!$this->allowsElement('a')) return;
-        if (strpos($token->data, '%') === false) return;
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleText(&$token)
+    {
+        if (!$this->allowsElement('a')) {
+            return;
+        }
+        if (strpos($token->data, '%') === false) {
+            return;
+        }
 
         $bits = preg_split('#%([a-z0-9]+\.[a-z0-9]+)#Si', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
         $token = array();
@@ -28,18 +52,20 @@ class HTMLPurifier_Injector_PurifierLinkify extends HTMLPurifier_Injector
         // $l = is link
         for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
             if (!$l) {
-                if ($bits[$i] === '') continue;
+                if ($bits[$i] === '') {
+                    continue;
+                }
                 $token[] = new HTMLPurifier_Token_Text($bits[$i]);
             } else {
-                $token[] = new HTMLPurifier_Token_Start('a',
-                    array('href' => str_replace('%s', $bits[$i], $this->docURL)));
+                $token[] = new HTMLPurifier_Token_Start(
+                    'a',
+                    array('href' => str_replace('%s', $bits[$i], $this->docURL))
+                );
                 $token[] = new HTMLPurifier_Token_Text('%' . $bits[$i]);
                 $token[] = new HTMLPurifier_Token_End('a');
             }
         }
-
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveEmpty.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveEmpty.php
new file mode 100644
index 0000000000..01353ff1d5
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveEmpty.php
@@ -0,0 +1,106 @@
+<?php
+
+class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
+{
+    /**
+     * @type HTMLPurifier_Context
+     */
+    private $context;
+
+    /**
+     * @type HTMLPurifier_Config
+     */
+    private $config;
+
+    /**
+     * @type HTMLPurifier_AttrValidator
+     */
+    private $attrValidator;
+
+    /**
+     * @type bool
+     */
+    private $removeNbsp;
+
+    /**
+     * @type bool
+     */
+    private $removeNbspExceptions;
+
+    /**
+     * Cached contents of %AutoFormat.RemoveEmpty.Predicate
+     * @type array
+     */
+    private $exclude;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return void
+     */
+    public function prepare($config, $context)
+    {
+        parent::prepare($config, $context);
+        $this->config = $config;
+        $this->context = $context;
+        $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
+        $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
+        $this->exclude = $config->get('AutoFormat.RemoveEmpty.Predicate');
+        $this->attrValidator = new HTMLPurifier_AttrValidator();
+    }
+
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleElement(&$token)
+    {
+        if (!$token instanceof HTMLPurifier_Token_Start) {
+            return;
+        }
+        $next = false;
+        $deleted = 1; // the current tag
+        for ($i = count($this->inputZipper->back) - 1; $i >= 0; $i--, $deleted++) {
+            $next = $this->inputZipper->back[$i];
+            if ($next instanceof HTMLPurifier_Token_Text) {
+                if ($next->is_whitespace) {
+                    continue;
+                }
+                if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
+                    $plain = str_replace("\xC2\xA0", "", $next->data);
+                    $isWsOrNbsp = $plain === '' || ctype_space($plain);
+                    if ($isWsOrNbsp) {
+                        continue;
+                    }
+                }
+            }
+            break;
+        }
+        if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
+            $this->attrValidator->validateToken($token, $this->config, $this->context);
+            $token->armor['ValidateAttributes'] = true;
+            if (isset($this->exclude[$token->name])) {
+                $r = true;
+                foreach ($this->exclude[$token->name] as $elem) {
+                    if (!isset($token->attr[$elem])) $r = false;
+                }
+                if ($r) return;
+            }
+            if (isset($token->attr['id']) || isset($token->attr['name'])) {
+                return;
+            }
+            $token = $deleted + 1;
+            for ($b = 0, $c = count($this->inputZipper->front); $b < $c; $b++) {
+                $prev = $this->inputZipper->front[$b];
+                if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) {
+                    continue;
+                }
+                break;
+            }
+            // This is safe because we removed the token that triggered this.
+            $this->rewindOffset($b+$deleted);
+            return;
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php
similarity index 74%
rename from library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php
index b21313470e..9ee7aa84d7 100644
--- a/library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php
@@ -5,25 +5,45 @@
  */
 class HTMLPurifier_Injector_RemoveSpansWithoutAttributes extends HTMLPurifier_Injector
 {
+    /**
+     * @type string
+     */
     public $name = 'RemoveSpansWithoutAttributes';
+
+    /**
+     * @type array
+     */
     public $needed = array('span');
 
+    /**
+     * @type HTMLPurifier_AttrValidator
+     */
     private $attrValidator;
 
     /**
-     * Used by AttrValidator
+     * Used by AttrValidator.
+     * @type HTMLPurifier_Config
      */
     private $config;
+
+    /**
+     * @type HTMLPurifier_Context
+     */
     private $context;
 
-    public function prepare($config, $context) {
+    public function prepare($config, $context)
+    {
         $this->attrValidator = new HTMLPurifier_AttrValidator();
         $this->config = $config;
         $this->context = $context;
         return parent::prepare($config, $context);
     }
 
-    public function handleElement(&$token) {
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleElement(&$token)
+    {
         if ($token->name !== 'span' || !$token instanceof HTMLPurifier_Token_Start) {
             return;
         }
@@ -39,8 +59,8 @@ class HTMLPurifier_Injector_RemoveSpansWithoutAttributes extends HTMLPurifier_In
         }
 
         $nesting = 0;
-        $spanContentTokens = array();
-        while ($this->forwardUntilEndToken($i, $current, $nesting)) {}
+        while ($this->forwardUntilEndToken($i, $current, $nesting)) {
+        }
 
         if ($current instanceof HTMLPurifier_Token_End && $current->name === 'span') {
             // Mark closing span tag for deletion
@@ -50,7 +70,11 @@ class HTMLPurifier_Injector_RemoveSpansWithoutAttributes extends HTMLPurifier_In
         }
     }
 
-    public function handleEnd(&$token) {
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleEnd(&$token)
+    {
         if ($token->markForDeletion) {
             $token = false;
         }
diff --git a/library/HTMLPurifier/Injector/SafeObject.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/SafeObject.php
similarity index 78%
rename from library/HTMLPurifier/Injector/SafeObject.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/SafeObject.php
index 9e178ce01a..3d17e07af2 100644
--- a/library/HTMLPurifier/Injector/SafeObject.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Injector/SafeObject.php
@@ -6,29 +6,61 @@
  */
 class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
 {
+    /**
+     * @type string
+     */
     public $name = 'SafeObject';
+
+    /**
+     * @type array
+     */
     public $needed = array('object', 'param');
 
+    /**
+     * @type array
+     */
     protected $objectStack = array();
-    protected $paramStack  = array();
 
-    // Keep this synchronized with AttrTransform/SafeParam.php
+    /**
+     * @type array
+     */
+    protected $paramStack = array();
+
+    /**
+     * Keep this synchronized with AttrTransform/SafeParam.php.
+     * @type array
+     */
     protected $addParam = array(
         'allowScriptAccess' => 'never',
         'allowNetworking' => 'internal',
     );
+
+    /**
+     * @type array
+     */
     protected $allowedParam = array(
         'wmode' => true,
         'movie' => true,
         'flashvars' => true,
         'src' => true,
+        'allowFullScreen' => true, // if omitted, assume to be 'false'
     );
 
-    public function prepare($config, $context) {
+    /**
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return void
+     */
+    public function prepare($config, $context)
+    {
         parent::prepare($config, $context);
     }
 
-    public function handleElement(&$token) {
+    /**
+     * @param HTMLPurifier_Token $token
+     */
+    public function handleElement(&$token)
+    {
         if ($token->name == 'object') {
             $this->objectStack[] = $token;
             $this->paramStack[] = array();
@@ -50,16 +82,15 @@ class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
                 // attribute, which we need if a type is specified. This is
                 // *very* Flash specific.
                 if (!isset($this->objectStack[$i]->attr['data']) &&
-                    ($token->attr['name'] == 'movie' || $token->attr['name'] == 'src')) {
+                    ($token->attr['name'] == 'movie' || $token->attr['name'] == 'src')
+                ) {
                     $this->objectStack[$i]->attr['data'] = $token->attr['value'];
                 }
                 // Check if the parameter is the correct value but has not
                 // already been added
-                if (
-                    !isset($this->paramStack[$i][$n]) &&
+                if (!isset($this->paramStack[$i][$n]) &&
                     isset($this->addParam[$n]) &&
-                    $token->attr['name'] === $this->addParam[$n]
-                ) {
+                    $token->attr['name'] === $this->addParam[$n]) {
                     // keep token, and add to param stack
                     $this->paramStack[$i][$n] = true;
                 } elseif (isset($this->allowedParam[$n])) {
@@ -75,7 +106,8 @@ class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
         }
     }
 
-    public function handleEnd(&$token) {
+    public function handleEnd(&$token)
+    {
         // This is the WRONG way of handling the object and param stacks;
         // we should be inserting them directly on the relevant object tokens
         // so that the global stack handling handles it.
@@ -84,7 +116,6 @@ class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
             array_pop($this->paramStack);
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Language.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language.php
similarity index 67%
rename from library/HTMLPurifier/Language.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Language.php
index 3e2be03b58..65277dd43c 100644
--- a/library/HTMLPurifier/Language.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language.php
@@ -8,22 +8,26 @@ class HTMLPurifier_Language
 {
 
     /**
-     * ISO 639 language code of language. Prefers shortest possible version
+     * ISO 639 language code of language. Prefers shortest possible version.
+     * @type string
      */
     public $code = 'en';
 
     /**
-     * Fallback language code
+     * Fallback language code.
+     * @type bool|string
      */
     public $fallback = false;
 
     /**
-     * Array of localizable messages
+     * Array of localizable messages.
+     * @type array
      */
     public $messages = array();
 
     /**
-     * Array of localizable error codes
+     * Array of localizable error codes.
+     * @type array
      */
     public $errorNames = array();
 
@@ -31,21 +35,33 @@ class HTMLPurifier_Language
      * True if no message file was found for this language, so English
      * is being used instead. Check this if you'd like to notify the
      * user that they've used a non-supported language.
+     * @type bool
      */
     public $error = false;
 
     /**
      * Has the language object been loaded yet?
+     * @type bool
      * @todo Make it private, fix usage in HTMLPurifier_LanguageTest
      */
     public $_loaded = false;
 
     /**
-     * Instances of HTMLPurifier_Config and HTMLPurifier_Context
+     * @type HTMLPurifier_Config
      */
-    protected $config, $context;
+    protected $config;
 
-    public function __construct($config, $context) {
+    /**
+     * @type HTMLPurifier_Context
+     */
+    protected $context;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     */
+    public function __construct($config, $context)
+    {
         $this->config  = $config;
         $this->context = $context;
     }
@@ -54,8 +70,11 @@ class HTMLPurifier_Language
      * Loads language object with necessary info from factory cache
      * @note This is a lazy loader
      */
-    public function load() {
-        if ($this->_loaded) return;
+    public function load()
+    {
+        if ($this->_loaded) {
+            return;
+        }
         $factory = HTMLPurifier_LanguageFactory::instance();
         $factory->loadLanguage($this->code);
         foreach ($factory->keys as $key) {
@@ -66,31 +85,43 @@ class HTMLPurifier_Language
 
     /**
      * Retrieves a localised message.
-     * @param $key string identifier of message
+     * @param string $key string identifier of message
      * @return string localised message
      */
-    public function getMessage($key) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->messages[$key])) return "[$key]";
+    public function getMessage($key)
+    {
+        if (!$this->_loaded) {
+            $this->load();
+        }
+        if (!isset($this->messages[$key])) {
+            return "[$key]";
+        }
         return $this->messages[$key];
     }
 
     /**
      * Retrieves a localised error name.
-     * @param $int integer error number, corresponding to PHP's error
-     *             reporting
+     * @param int $int error number, corresponding to PHP's error reporting
      * @return string localised message
      */
-    public function getErrorName($int) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->errorNames[$int])) return "[Error: $int]";
+    public function getErrorName($int)
+    {
+        if (!$this->_loaded) {
+            $this->load();
+        }
+        if (!isset($this->errorNames[$int])) {
+            return "[Error: $int]";
+        }
         return $this->errorNames[$int];
     }
 
     /**
      * Converts an array list into a string readable representation
+     * @param array $array
+     * @return string
      */
-    public function listify($array) {
+    public function listify($array)
+    {
         $sep      = $this->getMessage('Item separator');
         $sep_last = $this->getMessage('Item separator last');
         $ret = '';
@@ -108,15 +139,20 @@ class HTMLPurifier_Language
 
     /**
      * Formats a localised message with passed parameters
-     * @param $key string identifier of message
-     * @param $args Parameters to substitute in
+     * @param string $key string identifier of message
+     * @param array $args Parameters to substitute in
      * @return string localised message
      * @todo Implement conditionals? Right now, some messages make
      *     reference to line numbers, but those aren't always available
      */
-    public function formatMessage($key, $args = array()) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->messages[$key])) return "[$key]";
+    public function formatMessage($key, $args = array())
+    {
+        if (!$this->_loaded) {
+            $this->load();
+        }
+        if (!isset($this->messages[$key])) {
+            return "[$key]";
+        }
         $raw = $this->messages[$key];
         $subst = array();
         $generator = false;
@@ -124,9 +160,15 @@ class HTMLPurifier_Language
             if (is_object($value)) {
                 if ($value instanceof HTMLPurifier_Token) {
                     // factor this out some time
-                    if (!$generator) $generator = $this->context->get('Generator');
-                    if (isset($value->name)) $subst['$'.$i.'.Name'] = $value->name;
-                    if (isset($value->data)) $subst['$'.$i.'.Data'] = $value->data;
+                    if (!$generator) {
+                        $generator = $this->context->get('Generator');
+                    }
+                    if (isset($value->name)) {
+                        $subst['$'.$i.'.Name'] = $value->name;
+                    }
+                    if (isset($value->data)) {
+                        $subst['$'.$i.'.Data'] = $value->data;
+                    }
                     $subst['$'.$i.'.Compact'] =
                     $subst['$'.$i.'.Serialized'] = $generator->generateFromToken($value);
                     // a more complex algorithm for compact representation
@@ -157,7 +199,6 @@ class HTMLPurifier_Language
         }
         return strtr($raw, $subst);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Language/classes/en-x-test.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/classes/en-x-test.php
similarity index 97%
rename from library/HTMLPurifier/Language/classes/en-x-test.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Language/classes/en-x-test.php
index d52fcb7ac1..8828f5cded 100644
--- a/library/HTMLPurifier/Language/classes/en-x-test.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/classes/en-x-test.php
@@ -4,9 +4,6 @@
 
 class HTMLPurifier_Language_en_x_test extends HTMLPurifier_Language
 {
-
-
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Language/messages/en-x-test.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en-x-test.php
similarity index 100%
rename from library/HTMLPurifier/Language/messages/en-x-test.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en-x-test.php
diff --git a/library/HTMLPurifier/Language/messages/en-x-testmini.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en-x-testmini.php
similarity index 100%
rename from library/HTMLPurifier/Language/messages/en-x-testmini.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en-x-testmini.php
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en.php
new file mode 100644
index 0000000000..c7f197e1e1
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Language/messages/en.php
@@ -0,0 +1,55 @@
+<?php
+
+$fallback = false;
+
+$messages = array(
+
+    'HTMLPurifier' => 'HTML Purifier',
+// for unit testing purposes
+    'LanguageFactoryTest: Pizza' => 'Pizza',
+    'LanguageTest: List' => '$1',
+    'LanguageTest: Hash' => '$1.Keys; $1.Values',
+    'Item separator' => ', ',
+    'Item separator last' => ' and ', // non-Harvard style
+
+    'ErrorCollector: No errors' => 'No errors detected. However, because error reporting is still incomplete, there may have been errors that the error collector was not notified of; please inspect the output HTML carefully.',
+    'ErrorCollector: At line' => ' at line $line',
+    'ErrorCollector: Incidental errors' => 'Incidental errors',
+    'Lexer: Unclosed comment' => 'Unclosed comment',
+    'Lexer: Unescaped lt' => 'Unescaped less-than sign (<) should be &lt;',
+    'Lexer: Missing gt' => 'Missing greater-than sign (>), previous less-than sign (<) should be escaped',
+    'Lexer: Missing attribute key' => 'Attribute declaration has no key',
+    'Lexer: Missing end quote' => 'Attribute declaration has no end quote',
+    'Lexer: Extracted body' => 'Removed document metadata tags',
+    'Strategy_RemoveForeignElements: Tag transform' => '<$1> element transformed into $CurrentToken.Serialized',
+    'Strategy_RemoveForeignElements: Missing required attribute' => '$CurrentToken.Compact element missing required attribute $1',
+    'Strategy_RemoveForeignElements: Foreign element to text' => 'Unrecognized $CurrentToken.Serialized tag converted to text',
+    'Strategy_RemoveForeignElements: Foreign element removed' => 'Unrecognized $CurrentToken.Serialized tag removed',
+    'Strategy_RemoveForeignElements: Comment removed' => 'Comment containing "$CurrentToken.Data" removed',
+    'Strategy_RemoveForeignElements: Foreign meta element removed' => 'Unrecognized $CurrentToken.Serialized meta tag and all descendants removed',
+    'Strategy_RemoveForeignElements: Token removed to end' => 'Tags and text starting from $1 element where removed to end',
+    'Strategy_RemoveForeignElements: Trailing hyphen in comment removed' => 'Trailing hyphen(s) in comment removed',
+    'Strategy_RemoveForeignElements: Hyphens in comment collapsed' => 'Double hyphens in comments are not allowed, and were collapsed into single hyphens',
+    'Strategy_MakeWellFormed: Unnecessary end tag removed' => 'Unnecessary $CurrentToken.Serialized tag removed',
+    'Strategy_MakeWellFormed: Unnecessary end tag to text' => 'Unnecessary $CurrentToken.Serialized tag converted to text',
+    'Strategy_MakeWellFormed: Tag auto closed' => '$1.Compact started on line $1.Line auto-closed by $CurrentToken.Compact',
+    'Strategy_MakeWellFormed: Tag carryover' => '$1.Compact started on line $1.Line auto-continued into $CurrentToken.Compact',
+    'Strategy_MakeWellFormed: Stray end tag removed' => 'Stray $CurrentToken.Serialized tag removed',
+    'Strategy_MakeWellFormed: Stray end tag to text' => 'Stray $CurrentToken.Serialized tag converted to text',
+    'Strategy_MakeWellFormed: Tag closed by element end' => '$1.Compact tag started on line $1.Line closed by end of $CurrentToken.Serialized',
+    'Strategy_MakeWellFormed: Tag closed by document end' => '$1.Compact tag started on line $1.Line closed by end of document',
+    'Strategy_FixNesting: Node removed' => '$CurrentToken.Compact node removed',
+    'Strategy_FixNesting: Node excluded' => '$CurrentToken.Compact node removed due to descendant exclusion by ancestor element',
+    'Strategy_FixNesting: Node reorganized' => 'Contents of $CurrentToken.Compact node reorganized to enforce its content model',
+    'Strategy_FixNesting: Node contents removed' => 'Contents of $CurrentToken.Compact node removed',
+    'AttrValidator: Attributes transformed' => 'Attributes on $CurrentToken.Compact transformed from $1.Keys to $2.Keys',
+    'AttrValidator: Attribute removed' => '$CurrentAttr.Name attribute on $CurrentToken.Compact removed',
+);
+
+$errorNames = array(
+    E_ERROR => 'Error',
+    E_WARNING => 'Warning',
+    E_NOTICE => 'Notice'
+);
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/LanguageFactory.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/LanguageFactory.php
similarity index 75%
rename from library/HTMLPurifier/LanguageFactory.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/LanguageFactory.php
index 134ef8c745..4e35272d87 100644
--- a/library/HTMLPurifier/LanguageFactory.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/LanguageFactory.php
@@ -11,50 +11,53 @@ class HTMLPurifier_LanguageFactory
 {
 
     /**
-     * Cache of language code information used to load HTMLPurifier_Language objects
+     * Cache of language code information used to load HTMLPurifier_Language objects.
      * Structure is: $factory->cache[$language_code][$key] = $value
-     * @value array map
+     * @type array
      */
     public $cache;
 
     /**
      * Valid keys in the HTMLPurifier_Language object. Designates which
      * variables to slurp out of a message file.
-     * @value array list
+     * @type array
      */
     public $keys = array('fallback', 'messages', 'errorNames');
 
     /**
-     * Instance of HTMLPurifier_AttrDef_Lang to validate language codes
-     * @value object HTMLPurifier_AttrDef_Lang
+     * Instance to validate language codes.
+     * @type HTMLPurifier_AttrDef_Lang
+     *
      */
     protected $validator;
 
     /**
      * Cached copy of dirname(__FILE__), directory of current file without
-     * trailing slash
-     * @value string filename
+     * trailing slash.
+     * @type string
      */
     protected $dir;
 
     /**
-     * Keys whose contents are a hash map and can be merged
-     * @value array lookup
+     * Keys whose contents are a hash map and can be merged.
+     * @type array
      */
     protected $mergeable_keys_map = array('messages' => true, 'errorNames' => true);
 
     /**
-     * Keys whose contents are a list and can be merged
+     * Keys whose contents are a list and can be merged.
      * @value array lookup
      */
     protected $mergeable_keys_list = array();
 
     /**
      * Retrieve sole instance of the factory.
-     * @param $prototype Optional prototype to overload sole instance with,
+     * @param HTMLPurifier_LanguageFactory $prototype Optional prototype to overload sole instance with,
      *                   or bool true to reset to default factory.
+     * @return HTMLPurifier_LanguageFactory
      */
-    public static function instance($prototype = null) {
+    public static function instance($prototype = null)
+    {
         static $instance = null;
         if ($prototype !== null) {
             $instance = $prototype;
@@ -69,28 +72,34 @@ class HTMLPurifier_LanguageFactory
      * Sets up the singleton, much like a constructor
      * @note Prevents people from getting this outside of the singleton
      */
-    public function setup() {
+    public function setup()
+    {
         $this->validator = new HTMLPurifier_AttrDef_Lang();
         $this->dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier';
     }
 
     /**
      * Creates a language object, handles class fallbacks
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @param $code Code to override configuration with. Private parameter.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @param bool|string $code Code to override configuration with. Private parameter.
+     * @return HTMLPurifier_Language
      */
-    public function create($config, $context, $code = false) {
-
+    public function create($config, $context, $code = false)
+    {
         // validate language code
         if ($code === false) {
             $code = $this->validator->validate(
-              $config->get('Core.Language'), $config, $context
+                $config->get('Core.Language'),
+                $config,
+                $context
             );
         } else {
             $code = $this->validator->validate($code, $config, $context);
         }
-        if ($code === false) $code = 'en'; // malformed code becomes English
+        if ($code === false) {
+            $code = 'en'; // malformed code becomes English
+        }
 
         $pcode = str_replace('-', '_', $code); // make valid PHP classname
         static $depth = 0; // recursion protection
@@ -114,32 +123,34 @@ class HTMLPurifier_LanguageFactory
                 $depth--;
             }
         }
-
         $lang->code = $code;
-
         return $lang;
-
     }
 
     /**
      * Returns the fallback language for language
      * @note Loads the original language into cache
-     * @param $code string language code
+     * @param string $code language code
+     * @return string|bool
      */
-    public function getFallbackFor($code) {
+    public function getFallbackFor($code)
+    {
         $this->loadLanguage($code);
         return $this->cache[$code]['fallback'];
     }
 
     /**
      * Loads language into the cache, handles message file and fallbacks
-     * @param $code string language code
+     * @param string $code language code
      */
-    public function loadLanguage($code) {
+    public function loadLanguage($code)
+    {
         static $languages_seen = array(); // recursion guard
 
         // abort if we've already loaded it
-        if (isset($this->cache[$code])) return;
+        if (isset($this->cache[$code])) {
+            return;
+        }
 
         // generate filename
         $filename = $this->dir . '/Language/messages/' . $code . '.php';
@@ -162,8 +173,11 @@ class HTMLPurifier_LanguageFactory
 
             // infinite recursion guard
             if (isset($languages_seen[$code])) {
-                trigger_error('Circular fallback reference in language ' .
-                    $code, E_USER_ERROR);
+                trigger_error(
+                    'Circular fallback reference in language ' .
+                    $code,
+                    E_USER_ERROR
+                );
                 $fallback = 'en';
             }
             $language_seen[$code] = true;
@@ -173,26 +187,23 @@ class HTMLPurifier_LanguageFactory
             $fallback_cache = $this->cache[$fallback];
 
             // merge fallback with current language
-            foreach ( $this->keys as $key ) {
+            foreach ($this->keys as $key) {
                 if (isset($cache[$key]) && isset($fallback_cache[$key])) {
                     if (isset($this->mergeable_keys_map[$key])) {
                         $cache[$key] = $cache[$key] + $fallback_cache[$key];
                     } elseif (isset($this->mergeable_keys_list[$key])) {
-                        $cache[$key] = array_merge( $fallback_cache[$key], $cache[$key] );
+                        $cache[$key] = array_merge($fallback_cache[$key], $cache[$key]);
                     }
                 } else {
                     $cache[$key] = $fallback_cache[$key];
                 }
             }
-
         }
 
         // save to cache for later retrieval
         $this->cache[$code] = $cache;
-
         return;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Length.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Length.php
similarity index 56%
rename from library/HTMLPurifier/Length.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Length.php
index 8d2a46b7da..bbfbe6624d 100644
--- a/library/HTMLPurifier/Length.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Length.php
@@ -9,21 +9,25 @@ class HTMLPurifier_Length
 
     /**
      * String numeric magnitude.
+     * @type string
      */
     protected $n;
 
     /**
      * String unit. False is permitted if $n = 0.
+     * @type string|bool
      */
     protected $unit;
 
     /**
      * Whether or not this length is valid. Null if not calculated yet.
+     * @type bool
      */
     protected $isValid;
 
     /**
-     * Lookup array of units recognized by CSS 2.1
+     * Array Lookup array of units recognized by CSS 2.1
+     * @type array
      */
     protected static $allowedUnits = array(
         'em' => true, 'ex' => true, 'px' => true, 'in' => true,
@@ -31,85 +35,126 @@ class HTMLPurifier_Length
     );
 
     /**
-     * @param number $n Magnitude
-     * @param string $u Unit
+     * @param string $n Magnitude
+     * @param bool|string $u Unit
      */
-    public function __construct($n = '0', $u = false) {
+    public function __construct($n = '0', $u = false)
+    {
         $this->n = (string) $n;
         $this->unit = $u !== false ? (string) $u : false;
     }
 
     /**
      * @param string $s Unit string, like '2em' or '3.4in'
+     * @return HTMLPurifier_Length
      * @warning Does not perform validation.
      */
-    static public function make($s) {
-        if ($s instanceof HTMLPurifier_Length) return $s;
+    public static function make($s)
+    {
+        if ($s instanceof HTMLPurifier_Length) {
+            return $s;
+        }
         $n_length = strspn($s, '1234567890.+-');
         $n = substr($s, 0, $n_length);
         $unit = substr($s, $n_length);
-        if ($unit === '') $unit = false;
+        if ($unit === '') {
+            $unit = false;
+        }
         return new HTMLPurifier_Length($n, $unit);
     }
 
     /**
      * Validates the number and unit.
+     * @return bool
      */
-    protected function validate() {
+    protected function validate()
+    {
         // Special case:
-        if ($this->n === '+0' || $this->n === '-0') $this->n = '0';
-        if ($this->n === '0' && $this->unit === false) return true;
-        if (!ctype_lower($this->unit)) $this->unit = strtolower($this->unit);
-        if (!isset(HTMLPurifier_Length::$allowedUnits[$this->unit])) return false;
+        if ($this->n === '+0' || $this->n === '-0') {
+            $this->n = '0';
+        }
+        if ($this->n === '0' && $this->unit === false) {
+            return true;
+        }
+        if (!ctype_lower($this->unit)) {
+            $this->unit = strtolower($this->unit);
+        }
+        if (!isset(HTMLPurifier_Length::$allowedUnits[$this->unit])) {
+            return false;
+        }
         // Hack:
         $def = new HTMLPurifier_AttrDef_CSS_Number();
         $result = $def->validate($this->n, false, false);
-        if ($result === false) return false;
+        if ($result === false) {
+            return false;
+        }
         $this->n = $result;
         return true;
     }
 
     /**
      * Returns string representation of number.
+     * @return string
      */
-    public function toString() {
-        if (!$this->isValid()) return false;
+    public function toString()
+    {
+        if (!$this->isValid()) {
+            return false;
+        }
         return $this->n . $this->unit;
     }
 
     /**
      * Retrieves string numeric magnitude.
+     * @return string
      */
-    public function getN() {return $this->n;}
+    public function getN()
+    {
+        return $this->n;
+    }
 
     /**
      * Retrieves string unit.
+     * @return string
      */
-    public function getUnit() {return $this->unit;}
+    public function getUnit()
+    {
+        return $this->unit;
+    }
 
     /**
      * Returns true if this length unit is valid.
+     * @return bool
      */
-    public function isValid() {
-        if ($this->isValid === null) $this->isValid = $this->validate();
+    public function isValid()
+    {
+        if ($this->isValid === null) {
+            $this->isValid = $this->validate();
+        }
         return $this->isValid;
     }
 
     /**
      * Compares two lengths, and returns 1 if greater, -1 if less and 0 if equal.
+     * @param HTMLPurifier_Length $l
+     * @return int
      * @warning If both values are too large or small, this calculation will
      *          not work properly
      */
-    public function compareTo($l) {
-        if ($l === false) return false;
+    public function compareTo($l)
+    {
+        if ($l === false) {
+            return false;
+        }
         if ($l->unit !== $this->unit) {
             $converter = new HTMLPurifier_UnitConverter();
             $l = $converter->convert($l, $this->unit);
-            if ($l === false) return false;
+            if ($l === false) {
+                return false;
+            }
         }
         return $this->n - $l->n;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Lexer.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer.php
similarity index 63%
rename from library/HTMLPurifier/Lexer.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer.php
index b05e115468..43732621dc 100644
--- a/library/HTMLPurifier/Lexer.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer.php
@@ -62,16 +62,20 @@ class HTMLPurifier_Lexer
      *       To specify your own prototype, set %Core.LexerImpl to it.
      *       This change in behavior de-singletonizes the lexer object.
      *
-     * @param $config Instance of HTMLPurifier_Config
-     * @return Concrete lexer.
+     * @param HTMLPurifier_Config $config
+     * @return HTMLPurifier_Lexer
+     * @throws HTMLPurifier_Exception
      */
-    public static function create($config) {
-
+    public static function create($config)
+    {
         if (!($config instanceof HTMLPurifier_Config)) {
             $lexer = $config;
-            trigger_error("Passing a prototype to
-              HTMLPurifier_Lexer::create() is deprecated, please instead
-              use %Core.LexerImpl", E_USER_WARNING);
+            trigger_error(
+                "Passing a prototype to
+                HTMLPurifier_Lexer::create() is deprecated, please instead
+                use %Core.LexerImpl",
+                E_USER_WARNING
+            );
         } else {
             $lexer = $config->get('Core.LexerImpl');
         }
@@ -84,30 +88,28 @@ class HTMLPurifier_Lexer
         if (is_object($lexer)) {
             $inst = $lexer;
         } else {
+            if (is_null($lexer)) {
+                do {
+                    // auto-detection algorithm
+                    if ($needs_tracking) {
+                        $lexer = 'DirectLex';
+                        break;
+                    }
 
-            if (is_null($lexer)) { do {
-                // auto-detection algorithm
-
-                if ($needs_tracking) {
-                    $lexer = 'DirectLex';
-                    break;
-                }
-
-                if (
-                    class_exists('DOMDocument') &&
-                    method_exists('DOMDocument', 'loadHTML') &&
-                    !extension_loaded('domxml')
-                ) {
-                    // check for DOM support, because while it's part of the
-                    // core, it can be disabled compile time. Also, the PECL
-                    // domxml extension overrides the default DOM, and is evil
-                    // and nasty and we shan't bother to support it
-                    $lexer = 'DOMLex';
-                } else {
-                    $lexer = 'DirectLex';
-                }
-
-            } while(0); } // do..while so we can break
+                    if (class_exists('DOMDocument') &&
+                        method_exists('DOMDocument', 'loadHTML') &&
+                        !extension_loaded('domxml')
+                    ) {
+                        // check for DOM support, because while it's part of the
+                        // core, it can be disabled compile time. Also, the PECL
+                        // domxml extension overrides the default DOM, and is evil
+                        // and nasty and we shan't bother to support it
+                        $lexer = 'DOMLex';
+                    } else {
+                        $lexer = 'DirectLex';
+                    }
+                } while (0);
+            } // do..while so we can break
 
             // instantiate recognized string names
             switch ($lexer) {
@@ -121,16 +123,24 @@ class HTMLPurifier_Lexer
                     $inst = new HTMLPurifier_Lexer_PH5P();
                     break;
                 default:
-                    throw new HTMLPurifier_Exception("Cannot instantiate unrecognized Lexer type " . htmlspecialchars($lexer));
+                    throw new HTMLPurifier_Exception(
+                        "Cannot instantiate unrecognized Lexer type " .
+                        htmlspecialchars($lexer)
+                    );
             }
         }
 
-        if (!$inst) throw new HTMLPurifier_Exception('No lexer was instantiated');
+        if (!$inst) {
+            throw new HTMLPurifier_Exception('No lexer was instantiated');
+        }
 
         // once PHP DOM implements native line numbers, or we
         // hack out something using XSLT, remove this stipulation
         if ($needs_tracking && !$inst->tracksLineNumbers) {
-            throw new HTMLPurifier_Exception('Cannot use lexer that does not support line numbers with Core.MaintainLineNumbers or Core.CollectErrors (use DirectLex instead)');
+            throw new HTMLPurifier_Exception(
+                'Cannot use lexer that does not support line numbers with ' .
+                'Core.MaintainLineNumbers or Core.CollectErrors (use DirectLex instead)'
+            );
         }
 
         return $inst;
@@ -139,23 +149,25 @@ class HTMLPurifier_Lexer
 
     // -- CONVENIENCE MEMBERS ---------------------------------------------
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->_entity_parser = new HTMLPurifier_EntityParser();
     }
 
     /**
      * Most common entity to raw value conversion table for special entities.
+     * @type array
      */
     protected $_special_entity2str =
-            array(
-                    '&quot;' => '"',
-                    '&amp;'  => '&',
-                    '&lt;'   => '<',
-                    '&gt;'   => '>',
-                    '&#39;'  => "'",
-                    '&#039;' => "'",
-                    '&#x27;' => "'"
-            );
+        array(
+            '&quot;' => '"',
+            '&amp;' => '&',
+            '&lt;' => '<',
+            '&gt;' => '>',
+            '&#39;' => "'",
+            '&#039;' => "'",
+            '&#x27;' => "'"
+        );
 
     /**
      * Parses special entities into the proper characters.
@@ -168,27 +180,33 @@ class HTMLPurifier_Lexer
      * completely parsed, but that's only because all other entities should
      * have been handled previously in substituteNonSpecialEntities()
      *
-     * @param $string String character data to be parsed.
-     * @returns Parsed character data.
+     * @param string $string String character data to be parsed.
+     * @return string Parsed character data.
      */
-    public function parseData($string) {
-
+    public function parseData($string)
+    {
         // following functions require at least one character
-        if ($string === '') return '';
+        if ($string === '') {
+            return '';
+        }
 
         // subtracts amps that cannot possibly be escaped
         $num_amp = substr_count($string, '&') - substr_count($string, '& ') -
-            ($string[strlen($string)-1] === '&' ? 1 : 0);
+            ($string[strlen($string) - 1] === '&' ? 1 : 0);
 
-        if (!$num_amp) return $string; // abort if no entities
+        if (!$num_amp) {
+            return $string;
+        } // abort if no entities
         $num_esc_amp = substr_count($string, '&amp;');
         $string = strtr($string, $this->_special_entity2str);
 
         // code duplication for sake of optimization, see above
         $num_amp_2 = substr_count($string, '&') - substr_count($string, '& ') -
-            ($string[strlen($string)-1] === '&' ? 1 : 0);
+            ($string[strlen($string) - 1] === '&' ? 1 : 0);
 
-        if ($num_amp_2 <= $num_esc_amp) return $string;
+        if ($num_amp_2 <= $num_esc_amp) {
+            return $string;
+        }
 
         // hmm... now we have some uncommon entities. Use the callback.
         $string = $this->_entity_parser->substituteSpecialEntities($string);
@@ -197,21 +215,23 @@ class HTMLPurifier_Lexer
 
     /**
      * Lexes an HTML string into tokens.
-     *
      * @param $string String HTML.
-     * @return HTMLPurifier_Token array representation of HTML.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[] array representation of HTML.
      */
-    public function tokenizeHTML($string, $config, $context) {
+    public function tokenizeHTML($string, $config, $context)
+    {
         trigger_error('Call to abstract class', E_USER_ERROR);
     }
 
     /**
      * Translates CDATA sections into regular sections (through escaping).
-     *
-     * @param $string HTML string to process.
-     * @returns HTML with CDATA sections escaped.
+     * @param string $string HTML string to process.
+     * @return string HTML with CDATA sections escaped.
      */
-    protected static function escapeCDATA($string) {
+    protected static function escapeCDATA($string)
+    {
         return preg_replace_callback(
             '/<!\[CDATA\[(.+?)\]\]>/s',
             array('HTMLPurifier_Lexer', 'CDATACallback'),
@@ -221,8 +241,11 @@ class HTMLPurifier_Lexer
 
     /**
      * Special CDATA case that is especially convoluted for <script>
+     * @param string $string HTML string to process.
+     * @return string HTML with CDATA sections escaped.
      */
-    protected static function escapeCommentedCDATA($string) {
+    protected static function escapeCommentedCDATA($string)
+    {
         return preg_replace_callback(
             '#<!--//--><!\[CDATA\[//><!--(.+?)//--><!\]\]>#s',
             array('HTMLPurifier_Lexer', 'CDATACallback'),
@@ -230,16 +253,31 @@ class HTMLPurifier_Lexer
         );
     }
 
+    /**
+     * Special Internet Explorer conditional comments should be removed.
+     * @param string $string HTML string to process.
+     * @return string HTML with conditional comments removed.
+     */
+    protected static function removeIEConditional($string)
+    {
+        return preg_replace(
+            '#<!--\[if [^>]+\]>.*?<!\[endif\]-->#si', // probably should generalize for all strings
+            '',
+            $string
+        );
+    }
+
     /**
      * Callback function for escapeCDATA() that does the work.
      *
      * @warning Though this is public in order to let the callback happen,
      *          calling it directly is not recommended.
-     * @params $matches PCRE matches array, with index 0 the entire match
+     * @param array $matches PCRE matches array, with index 0 the entire match
      *                  and 1 the inside of the CDATA section.
-     * @returns Escaped internals of the CDATA section.
+     * @return string Escaped internals of the CDATA section.
      */
-    protected static function CDATACallback($matches) {
+    protected static function CDATACallback($matches)
+    {
         // not exactly sure why the character set is needed, but whatever
         return htmlspecialchars($matches[1], ENT_COMPAT, 'UTF-8');
     }
@@ -247,13 +285,19 @@ class HTMLPurifier_Lexer
     /**
      * Takes a piece of HTML and normalizes it by converting entities, fixing
      * encoding, extracting bits, and other good stuff.
+     * @param string $html HTML.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
      * @todo Consider making protected
      */
-    public function normalize($html, $config, $context) {
-
+    public function normalize($html, $config, $context)
+    {
         // normalize newlines to \n
-        $html = str_replace("\r\n", "\n", $html);
-        $html = str_replace("\r", "\n", $html);
+        if ($config->get('Core.NormalizeNewlines')) {
+            $html = str_replace("\r\n", "\n", $html);
+            $html = str_replace("\r", "\n", $html);
+        }
 
         if ($config->get('HTML.Trusted')) {
             // escape convoluted CDATA
@@ -263,6 +307,8 @@ class HTMLPurifier_Lexer
         // escape CDATA
         $html = $this->escapeCDATA($html);
 
+        $html = $this->removeIEConditional($html);
+
         // extract body from document if applicable
         if ($config->get('Core.ConvertDocumentToFragment')) {
             $e = false;
@@ -284,6 +330,11 @@ class HTMLPurifier_Lexer
         // represent non-SGML characters (horror, horror!)
         $html = HTMLPurifier_Encoder::cleanUTF8($html);
 
+        // if processing instructions are to removed, remove them now
+        if ($config->get('Core.RemoveProcessingInstructions')) {
+            $html = preg_replace('#<\?.+?\?>#s', '', $html);
+        }
+
         return $html;
     }
 
@@ -291,7 +342,8 @@ class HTMLPurifier_Lexer
      * Takes a string of HTML (fragment or document) and returns the content
      * @todo Consider making protected
      */
-    public function extractBody($html) {
+    public function extractBody($html)
+    {
         $matches = array();
         $result = preg_match('!<body[^>]*>(.*)</body>!is', $html, $matches);
         if ($result) {
@@ -300,7 +352,6 @@ class HTMLPurifier_Lexer
             return $html;
         }
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Lexer/DOMLex.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
similarity index 58%
rename from library/HTMLPurifier/Lexer/DOMLex.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
index 20dc2ed48c..b818192909 100644
--- a/library/HTMLPurifier/Lexer/DOMLex.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php
@@ -27,16 +27,26 @@
 class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
 {
 
+    /**
+     * @type HTMLPurifier_TokenFactory
+     */
     private $factory;
 
-    public function __construct() {
+    public function __construct()
+    {
         // setup the factory
         parent::__construct();
         $this->factory = new HTMLPurifier_TokenFactory();
     }
 
-    public function tokenizeHTML($html, $config, $context) {
-
+    /**
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[]
+     */
+    public function tokenizeHTML($html, $config, $context)
+    {
         $html = $this->normalize($html, $config, $context);
 
         // attempt to armor stray angled brackets that cannot possibly
@@ -65,30 +75,66 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
         $tokens = array();
         $this->tokenizeDOM(
             $doc->getElementsByTagName('html')->item(0)-> // <html>
-                  getElementsByTagName('body')->item(0)-> //   <body>
-                  getElementsByTagName('div')->item(0)    //     <div>
-            , $tokens);
+            getElementsByTagName('body')->item(0), //   <body>
+            $tokens
+        );
         return $tokens;
     }
 
     /**
-     * Recursive function that tokenizes a node, putting it into an accumulator.
-     *
-     * @param $node     DOMNode to be tokenized.
-     * @param $tokens   Array-list of already tokenized tokens.
-     * @param $collect  Says whether or start and close are collected, set to
-     *                  false at first recursion because it's the implicit DIV
-     *                  tag you're dealing with.
-     * @returns Tokens of node appended to previously passed tokens.
+     * Iterative function that tokenizes a node, putting it into an accumulator.
+     * To iterate is human, to recurse divine - L. Peter Deutsch
+     * @param DOMNode $node DOMNode to be tokenized.
+     * @param HTMLPurifier_Token[] $tokens   Array-list of already tokenized tokens.
+     * @return HTMLPurifier_Token of node appended to previously passed tokens.
      */
-    protected function tokenizeDOM($node, &$tokens, $collect = false) {
+    protected function tokenizeDOM($node, &$tokens)
+    {
+        $level = 0;
+        $nodes = array($level => new HTMLPurifier_Queue(array($node)));
+        $closingNodes = array();
+        do {
+            while (!$nodes[$level]->isEmpty()) {
+                $node = $nodes[$level]->shift(); // FIFO
+                $collect = $level > 0 ? true : false;
+                $needEndingTag = $this->createStartNode($node, $tokens, $collect);
+                if ($needEndingTag) {
+                    $closingNodes[$level][] = $node;
+                }
+                if ($node->childNodes && $node->childNodes->length) {
+                    $level++;
+                    $nodes[$level] = new HTMLPurifier_Queue();
+                    foreach ($node->childNodes as $childNode) {
+                        $nodes[$level]->push($childNode);
+                    }
+                }
+            }
+            $level--;
+            if ($level && isset($closingNodes[$level])) {
+                while ($node = array_pop($closingNodes[$level])) {
+                    $this->createEndNode($node, $tokens);
+                }
+            }
+        } while ($level > 0);
+    }
 
+    /**
+     * @param DOMNode $node DOMNode to be tokenized.
+     * @param HTMLPurifier_Token[] $tokens   Array-list of already tokenized tokens.
+     * @param bool $collect  Says whether or start and close are collected, set to
+     *                    false at first recursion because it's the implicit DIV
+     *                    tag you're dealing with.
+     * @return bool if the token needs an endtoken
+     * @todo data and tagName properties don't seem to exist in DOMNode?
+     */
+    protected function createStartNode($node, &$tokens, $collect)
+    {
         // intercept non element nodes. WE MUST catch all of them,
         // but we're not getting the character reference nodes because
         // those should have been preprocessed
         if ($node->nodeType === XML_TEXT_NODE) {
             $tokens[] = $this->factory->createText($node->data);
-            return;
+            return false;
         } elseif ($node->nodeType === XML_CDATA_SECTION_NODE) {
             // undo libxml's special treatment of <script> and <style> tags
             $last = end($tokens);
@@ -106,59 +152,61 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
                 }
             }
             $tokens[] = $this->factory->createText($this->parseData($data));
-            return;
+            return false;
         } elseif ($node->nodeType === XML_COMMENT_NODE) {
             // this is code is only invoked for comments in script/style in versions
             // of libxml pre-2.6.28 (regular comments, of course, are still
             // handled regularly)
             $tokens[] = $this->factory->createComment($node->data);
-            return;
-        } elseif (
+            return false;
+        } elseif ($node->nodeType !== XML_ELEMENT_NODE) {
             // not-well tested: there may be other nodes we have to grab
-            $node->nodeType !== XML_ELEMENT_NODE
-        ) {
-            return;
+            return false;
         }
 
-        $attr = $node->hasAttributes() ?
-            $this->transformAttrToAssoc($node->attributes) :
-            array();
+        $attr = $node->hasAttributes() ? $this->transformAttrToAssoc($node->attributes) : array();
 
         // We still have to make sure that the element actually IS empty
         if (!$node->childNodes->length) {
             if ($collect) {
                 $tokens[] = $this->factory->createEmpty($node->tagName, $attr);
             }
+            return false;
         } else {
-            if ($collect) { // don't wrap on first iteration
+            if ($collect) {
                 $tokens[] = $this->factory->createStart(
                     $tag_name = $node->tagName, // somehow, it get's dropped
                     $attr
                 );
             }
-            foreach ($node->childNodes as $node) {
-                // remember, it's an accumulator. Otherwise, we'd have
-                // to use array_merge
-                $this->tokenizeDOM($node, $tokens, true);
-            }
-            if ($collect) {
-                $tokens[] = $this->factory->createEnd($tag_name);
-            }
+            return true;
         }
-
     }
 
+    /**
+     * @param DOMNode $node
+     * @param HTMLPurifier_Token[] $tokens
+     */
+    protected function createEndNode($node, &$tokens)
+    {
+        $tokens[] = $this->factory->createEnd($node->tagName);
+    }
+
+
     /**
      * Converts a DOMNamedNodeMap of DOMAttr objects into an assoc array.
      *
-     * @param $attribute_list DOMNamedNodeMap of DOMAttr objects.
-     * @returns Associative array of attributes.
+     * @param DOMNamedNodeMap $node_map DOMNamedNodeMap of DOMAttr objects.
+     * @return array Associative array of attributes.
      */
-    protected function transformAttrToAssoc($node_map) {
+    protected function transformAttrToAssoc($node_map)
+    {
         // NamedNodeMap is documented very well, so we're using undocumented
         // features, namely, the fact that it implements Iterator and
         // has a ->length attribute
-        if ($node_map->length === 0) return array();
+        if ($node_map->length === 0) {
+            return array();
+        }
         $array = array();
         foreach ($node_map as $attr) {
             $array[$attr->name] = $attr->value;
@@ -168,46 +216,64 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
 
     /**
      * An error handler that mutes all errors
+     * @param int $errno
+     * @param string $errstr
      */
-    public function muteErrorHandler($errno, $errstr) {}
+    public function muteErrorHandler($errno, $errstr)
+    {
+    }
 
     /**
      * Callback function for undoing escaping of stray angled brackets
      * in comments
+     * @param array $matches
+     * @return string
      */
-    public function callbackUndoCommentSubst($matches) {
-        return '<!--' . strtr($matches[1], array('&amp;'=>'&','&lt;'=>'<')) . $matches[2];
+    public function callbackUndoCommentSubst($matches)
+    {
+        return '<!--' . strtr($matches[1], array('&amp;' => '&', '&lt;' => '<')) . $matches[2];
     }
 
     /**
      * Callback function that entity-izes ampersands in comments so that
      * callbackUndoCommentSubst doesn't clobber them
+     * @param array $matches
+     * @return string
      */
-    public function callbackArmorCommentEntities($matches) {
+    public function callbackArmorCommentEntities($matches)
+    {
         return '<!--' . str_replace('&', '&amp;', $matches[1]) . $matches[2];
     }
 
     /**
      * Wraps an HTML fragment in the necessary HTML
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
      */
-    protected function wrapHTML($html, $config, $context) {
+    protected function wrapHTML($html, $config, $context)
+    {
         $def = $config->getDefinition('HTML');
         $ret = '';
 
         if (!empty($def->doctype->dtdPublic) || !empty($def->doctype->dtdSystem)) {
             $ret .= '<!DOCTYPE html ';
-            if (!empty($def->doctype->dtdPublic)) $ret .= 'PUBLIC "' . $def->doctype->dtdPublic . '" ';
-            if (!empty($def->doctype->dtdSystem)) $ret .= '"' . $def->doctype->dtdSystem . '" ';
+            if (!empty($def->doctype->dtdPublic)) {
+                $ret .= 'PUBLIC "' . $def->doctype->dtdPublic . '" ';
+            }
+            if (!empty($def->doctype->dtdSystem)) {
+                $ret .= '"' . $def->doctype->dtdSystem . '" ';
+            }
             $ret .= '>';
         }
 
         $ret .= '<html><head>';
         $ret .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
         // No protection if $html contains a stray </div>!
-        $ret .= '</head><body><div>'.$html.'</div></body></html>';
+        $ret .= '</head><body>' . $html . '</body></html>';
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Lexer/DirectLex.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DirectLex.php
similarity index 76%
rename from library/HTMLPurifier/Lexer/DirectLex.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DirectLex.php
index 456e6e1908..746b6e315f 100644
--- a/library/HTMLPurifier/Lexer/DirectLex.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/DirectLex.php
@@ -12,30 +12,44 @@
  */
 class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
 {
-
+    /**
+     * @type bool
+     */
     public $tracksLineNumbers = true;
 
     /**
      * Whitespace characters for str(c)spn.
+     * @type string
      */
     protected $_whitespace = "\x20\x09\x0D\x0A";
 
     /**
      * Callback function for script CDATA fudge
-     * @param $matches, in form of array(opening tag, contents, closing tag)
+     * @param array $matches, in form of array(opening tag, contents, closing tag)
+     * @return string
      */
-    protected function scriptCallback($matches) {
+    protected function scriptCallback($matches)
+    {
         return $matches[1] . htmlspecialchars($matches[2], ENT_COMPAT, 'UTF-8') . $matches[3];
     }
 
-    public function tokenizeHTML($html, $config, $context) {
-
+    /**
+     * @param String $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array|HTMLPurifier_Token[]
+     */
+    public function tokenizeHTML($html, $config, $context)
+    {
         // special normalization for script tags without any armor
         // our "armor" heurstic is a < sign any number of whitespaces after
         // the first script tag
         if ($config->get('HTML.Trusted')) {
-            $html = preg_replace_callback('#(<script[^>]*>)(\s*[^<].+?)(</script>)#si',
-                array($this, 'scriptCallback'), $html);
+            $html = preg_replace_callback(
+                '#(<script[^>]*>)(\s*[^<].+?)(</script>)#si',
+                array($this, 'scriptCallback'),
+                $html
+            );
         }
 
         $html = $this->normalize($html, $config, $context);
@@ -55,15 +69,15 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
 
         if ($maintain_line_numbers) {
             $current_line = 1;
-            $current_col  = 0;
+            $current_col = 0;
             $length = strlen($html);
         } else {
             $current_line = false;
-            $current_col  = false;
+            $current_col = false;
             $length = false;
         }
         $context->register('CurrentLine', $current_line);
-        $context->register('CurrentCol',  $current_col);
+        $context->register('CurrentCol', $current_col);
         $nl = "\n";
         // how often to manually recalculate. This will ALWAYS be right,
         // but it's pretty wasteful. Set to 0 to turn off
@@ -77,16 +91,14 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
         // for testing synchronization
         $loops = 0;
 
-        while(++$loops) {
-
+        while (++$loops) {
             // $cursor is either at the start of a token, or inside of
             // a tag (i.e. there was a < immediately before it), as indicated
             // by $inside_tag
 
             if ($maintain_line_numbers) {
-
                 // $rcursor, however, is always at the start of a token.
-                $rcursor = $cursor - (int) $inside_tag;
+                $rcursor = $cursor - (int)$inside_tag;
 
                 // Column number is cheap, so we calculate it every round.
                 // We're interested at the *end* of the newline string, so
@@ -96,14 +108,11 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 $current_col = $rcursor - (is_bool($nl_pos) ? 0 : $nl_pos + 1);
 
                 // recalculate lines
-                if (
-                    $synchronize_interval &&  // synchronization is on
-                    $cursor > 0 &&            // cursor is further than zero
-                    $loops % $synchronize_interval === 0 // time to synchronize!
-                ) {
+                if ($synchronize_interval && // synchronization is on
+                    $cursor > 0 && // cursor is further than zero
+                    $loops % $synchronize_interval === 0) { // time to synchronize!
                     $current_line = 1 + $this->substrCount($html, $nl, 0, $cursor);
                 }
-
             }
 
             $position_next_lt = strpos($html, '<', $cursor);
@@ -119,35 +128,42 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
             if (!$inside_tag && $position_next_lt !== false) {
                 // We are not inside tag and there still is another tag to parse
                 $token = new
-                    HTMLPurifier_Token_Text(
-                        $this->parseData(
-                            substr(
-                                $html, $cursor, $position_next_lt - $cursor
-                            )
+                HTMLPurifier_Token_Text(
+                    $this->parseData(
+                        substr(
+                            $html,
+                            $cursor,
+                            $position_next_lt - $cursor
                         )
-                    );
+                    )
+                );
                 if ($maintain_line_numbers) {
                     $token->rawPosition($current_line, $current_col);
                     $current_line += $this->substrCount($html, $nl, $cursor, $position_next_lt - $cursor);
                 }
                 $array[] = $token;
-                $cursor  = $position_next_lt + 1;
+                $cursor = $position_next_lt + 1;
                 $inside_tag = true;
                 continue;
             } elseif (!$inside_tag) {
                 // We are not inside tag but there are no more tags
                 // If we're already at the end, break
-                if ($cursor === strlen($html)) break;
+                if ($cursor === strlen($html)) {
+                    break;
+                }
                 // Create Text of rest of string
                 $token = new
-                    HTMLPurifier_Token_Text(
-                        $this->parseData(
-                            substr(
-                                $html, $cursor
-                            )
+                HTMLPurifier_Token_Text(
+                    $this->parseData(
+                        substr(
+                            $html,
+                            $cursor
                         )
-                    );
-                if ($maintain_line_numbers) $token->rawPosition($current_line, $current_col);
+                    )
+                );
+                if ($maintain_line_numbers) {
+                    $token->rawPosition($current_line, $current_col);
+                }
                 $array[] = $token;
                 break;
             } elseif ($inside_tag && $position_next_gt !== false) {
@@ -171,16 +187,16 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 }
 
                 // Check if it's a comment
-                if (
-                    substr($segment, 0, 3) === '!--'
-                ) {
+                if (substr($segment, 0, 3) === '!--') {
                     // re-determine segment length, looking for -->
                     $position_comment_end = strpos($html, '-->', $cursor);
                     if ($position_comment_end === false) {
                         // uh oh, we have a comment that extends to
                         // infinity. Can't be helped: set comment
                         // end position to end of string
-                        if ($e) $e->send(E_WARNING, 'Lexer: Unclosed comment');
+                        if ($e) {
+                            $e->send(E_WARNING, 'Lexer: Unclosed comment');
+                        }
                         $position_comment_end = strlen($html);
                         $end = true;
                     } else {
@@ -189,11 +205,13 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                     $strlen_segment = $position_comment_end - $cursor;
                     $segment = substr($html, $cursor, $strlen_segment);
                     $token = new
-                        HTMLPurifier_Token_Comment(
-                            substr(
-                                $segment, 3, $strlen_segment - 3
-                            )
-                        );
+                    HTMLPurifier_Token_Comment(
+                        substr(
+                            $segment,
+                            3,
+                            $strlen_segment - 3
+                        )
+                    );
                     if ($maintain_line_numbers) {
                         $token->rawPosition($current_line, $current_col);
                         $current_line += $this->substrCount($html, $nl, $cursor, $strlen_segment);
@@ -205,7 +223,7 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 }
 
                 // Check if it's an end tag
-                $is_end_tag = (strpos($segment,'/') === 0);
+                $is_end_tag = (strpos($segment, '/') === 0);
                 if ($is_end_tag) {
                     $type = substr($segment, 1);
                     $token = new HTMLPurifier_Token_End($type);
@@ -224,7 +242,9 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 // text and go our merry way
                 if (!ctype_alpha($segment[0])) {
                     // XML:  $segment[0] !== '_' && $segment[0] !== ':'
-                    if ($e) $e->send(E_NOTICE, 'Lexer: Unescaped lt');
+                    if ($e) {
+                        $e->send(E_NOTICE, 'Lexer: Unescaped lt');
+                    }
                     $token = new HTMLPurifier_Token_Text('<');
                     if ($maintain_line_numbers) {
                         $token->rawPosition($current_line, $current_col);
@@ -239,7 +259,7 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 // trailing slash. Remember, we could have a tag like <br>, so
                 // any later token processing scripts must convert improperly
                 // classified EmptyTags from StartTags.
-                $is_self_closing = (strrpos($segment,'/') === $strlen_segment-1);
+                $is_self_closing = (strrpos($segment, '/') === $strlen_segment - 1);
                 if ($is_self_closing) {
                     $strlen_segment--;
                     $segment = substr($segment, 0, $strlen_segment);
@@ -269,14 +289,16 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 $attribute_string =
                     trim(
                         substr(
-                            $segment, $position_first_space
+                            $segment,
+                            $position_first_space
                         )
                     );
                 if ($attribute_string) {
                     $attr = $this->parseAttributeString(
-                                    $attribute_string
-                                  , $config, $context
-                              );
+                        $attribute_string,
+                        $config,
+                        $context
+                    );
                 } else {
                     $attr = array();
                 }
@@ -296,15 +318,19 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 continue;
             } else {
                 // inside tag, but there's no ending > sign
-                if ($e) $e->send(E_WARNING, 'Lexer: Missing gt');
+                if ($e) {
+                    $e->send(E_WARNING, 'Lexer: Missing gt');
+                }
                 $token = new
-                    HTMLPurifier_Token_Text(
-                        '<' .
-                        $this->parseData(
-                            substr($html, $cursor)
-                        )
-                    );
-                if ($maintain_line_numbers) $token->rawPosition($current_line, $current_col);
+                HTMLPurifier_Token_Text(
+                    '<' .
+                    $this->parseData(
+                        substr($html, $cursor)
+                    )
+                );
+                if ($maintain_line_numbers) {
+                    $token->rawPosition($current_line, $current_col);
+                }
                 // no cursor scroll? Hmm...
                 $array[] = $token;
                 break;
@@ -319,8 +345,14 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
 
     /**
      * PHP 5.0.x compatible substr_count that implements offset and length
+     * @param string $haystack
+     * @param string $needle
+     * @param int $offset
+     * @param int $length
+     * @return int
      */
-    protected function substrCount($haystack, $needle, $offset, $length) {
+    protected function substrCount($haystack, $needle, $offset, $length)
+    {
         static $oldVersion;
         if ($oldVersion === null) {
             $oldVersion = version_compare(PHP_VERSION, '5.1', '<');
@@ -336,13 +368,18 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
     /**
      * Takes the inside of an HTML tag and makes an assoc array of attributes.
      *
-     * @param $string Inside of tag excluding name.
-     * @returns Assoc array of attributes.
+     * @param string $string Inside of tag excluding name.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array Assoc array of attributes.
      */
-    public function parseAttributeString($string, $config, $context) {
-        $string = (string) $string; // quick typecast
+    public function parseAttributeString($string, $config, $context)
+    {
+        $string = (string)$string; // quick typecast
 
-        if ($string == '') return array(); // no attributes
+        if ($string == '') {
+            return array();
+        } // no attributes
 
         $e = false;
         if ($config->get('Core.CollectErrors')) {
@@ -361,46 +398,55 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
             list($key, $quoted_value) = explode('=', $string);
             $quoted_value = trim($quoted_value);
             if (!$key) {
-                if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
+                if ($e) {
+                    $e->send(E_ERROR, 'Lexer: Missing attribute key');
+                }
                 return array();
             }
-            if (!$quoted_value) return array($key => '');
+            if (!$quoted_value) {
+                return array($key => '');
+            }
             $first_char = @$quoted_value[0];
-            $last_char  = @$quoted_value[strlen($quoted_value)-1];
+            $last_char = @$quoted_value[strlen($quoted_value) - 1];
 
             $same_quote = ($first_char == $last_char);
             $open_quote = ($first_char == '"' || $first_char == "'");
 
-            if ( $same_quote && $open_quote) {
+            if ($same_quote && $open_quote) {
                 // well behaved
                 $value = substr($quoted_value, 1, strlen($quoted_value) - 2);
             } else {
                 // not well behaved
                 if ($open_quote) {
-                    if ($e) $e->send(E_ERROR, 'Lexer: Missing end quote');
+                    if ($e) {
+                        $e->send(E_ERROR, 'Lexer: Missing end quote');
+                    }
                     $value = substr($quoted_value, 1);
                 } else {
                     $value = $quoted_value;
                 }
             }
-            if ($value === false) $value = '';
+            if ($value === false) {
+                $value = '';
+            }
             return array($key => $this->parseData($value));
         }
 
         // setup loop environment
-        $array  = array(); // return assoc array of attributes
+        $array = array(); // return assoc array of attributes
         $cursor = 0; // current position in string (moves forward)
-        $size   = strlen($string); // size of the string (stays the same)
+        $size = strlen($string); // size of the string (stays the same)
 
         // if we have unquoted attributes, the parser expects a terminating
         // space, so let's guarantee that there's always a terminating space.
         $string .= ' ';
 
-        while(true) {
-
-            if ($cursor >= $size) {
-                break;
+        $old_cursor = -1;
+        while ($cursor < $size) {
+            if ($old_cursor >= $cursor) {
+                throw new Exception("Infinite loop detected");
             }
+            $old_cursor = $cursor;
 
             $cursor += ($value = strspn($string, $this->_whitespace, $cursor));
             // grab the key
@@ -415,8 +461,10 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
             $key = substr($string, $key_begin, $key_end - $key_begin);
 
             if (!$key) {
-                if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
-                $cursor += strcspn($string, $this->_whitespace, $cursor + 1); // prevent infinite loop
+                if ($e) {
+                    $e->send(E_ERROR, 'Lexer: Missing attribute key');
+                }
+                $cursor += 1 + strcspn($string, $this->_whitespace, $cursor + 1); // prevent infinite loop
                 continue; // empty key
             }
 
@@ -467,24 +515,25 @@ class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
                 }
 
                 $value = substr($string, $value_begin, $value_end - $value_begin);
-                if ($value === false) $value = '';
+                if ($value === false) {
+                    $value = '';
+                }
                 $array[$key] = $this->parseData($value);
                 $cursor++;
-
             } else {
                 // boolattr
                 if ($key !== '') {
                     $array[$key] = $key;
                 } else {
                     // purely theoretical
-                    if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
+                    if ($e) {
+                        $e->send(E_ERROR, 'Lexer: Missing attribute key');
+                    }
                 }
-
             }
         }
         return $array;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/PH5P.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/PH5P.php
new file mode 100644
index 0000000000..ff4fa218fb
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Lexer/PH5P.php
@@ -0,0 +1,4787 @@
+<?php
+
+/**
+ * Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.
+ * Occupies space in the HTML5 pseudo-namespace, which may cause conflicts.
+ *
+ * @note
+ *    Recent changes to PHP's DOM extension have resulted in some fatal
+ *    error conditions with the original version of PH5P. Pending changes,
+ *    this lexer will punt to DirectLex if DOM throws an exception.
+ */
+
+class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex
+{
+    /**
+     * @param string $html
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[]
+     */
+    public function tokenizeHTML($html, $config, $context)
+    {
+        $new_html = $this->normalize($html, $config, $context);
+        $new_html = $this->wrapHTML($new_html, $config, $context);
+        try {
+            $parser = new HTML5($new_html);
+            $doc = $parser->save();
+        } catch (DOMException $e) {
+            // Uh oh, it failed. Punt to DirectLex.
+            $lexer = new HTMLPurifier_Lexer_DirectLex();
+            $context->register('PH5PError', $e); // save the error, so we can detect it
+            return $lexer->tokenizeHTML($html, $config, $context); // use original HTML
+        }
+        $tokens = array();
+        $this->tokenizeDOM(
+            $doc->getElementsByTagName('html')->item(0)-> // <html>
+                getElementsByTagName('body')->item(0) //   <body>
+            ,
+            $tokens
+        );
+        return $tokens;
+    }
+}
+
+/*
+
+Copyright 2007 Jeroen van der Meer <http://jero.net/>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+class HTML5
+{
+    private $data;
+    private $char;
+    private $EOF;
+    private $state;
+    private $tree;
+    private $token;
+    private $content_model;
+    private $escape = false;
+    private $entities = array(
+        'AElig;',
+        'AElig',
+        'AMP;',
+        'AMP',
+        'Aacute;',
+        'Aacute',
+        'Acirc;',
+        'Acirc',
+        'Agrave;',
+        'Agrave',
+        'Alpha;',
+        'Aring;',
+        'Aring',
+        'Atilde;',
+        'Atilde',
+        'Auml;',
+        'Auml',
+        'Beta;',
+        'COPY;',
+        'COPY',
+        'Ccedil;',
+        'Ccedil',
+        'Chi;',
+        'Dagger;',
+        'Delta;',
+        'ETH;',
+        'ETH',
+        'Eacute;',
+        'Eacute',
+        'Ecirc;',
+        'Ecirc',
+        'Egrave;',
+        'Egrave',
+        'Epsilon;',
+        'Eta;',
+        'Euml;',
+        'Euml',
+        'GT;',
+        'GT',
+        'Gamma;',
+        'Iacute;',
+        'Iacute',
+        'Icirc;',
+        'Icirc',
+        'Igrave;',
+        'Igrave',
+        'Iota;',
+        'Iuml;',
+        'Iuml',
+        'Kappa;',
+        'LT;',
+        'LT',
+        'Lambda;',
+        'Mu;',
+        'Ntilde;',
+        'Ntilde',
+        'Nu;',
+        'OElig;',
+        'Oacute;',
+        'Oacute',
+        'Ocirc;',
+        'Ocirc',
+        'Ograve;',
+        'Ograve',
+        'Omega;',
+        'Omicron;',
+        'Oslash;',
+        'Oslash',
+        'Otilde;',
+        'Otilde',
+        'Ouml;',
+        'Ouml',
+        'Phi;',
+        'Pi;',
+        'Prime;',
+        'Psi;',
+        'QUOT;',
+        'QUOT',
+        'REG;',
+        'REG',
+        'Rho;',
+        'Scaron;',
+        'Sigma;',
+        'THORN;',
+        'THORN',
+        'TRADE;',
+        'Tau;',
+        'Theta;',
+        'Uacute;',
+        'Uacute',
+        'Ucirc;',
+        'Ucirc',
+        'Ugrave;',
+        'Ugrave',
+        'Upsilon;',
+        'Uuml;',
+        'Uuml',
+        'Xi;',
+        'Yacute;',
+        'Yacute',
+        'Yuml;',
+        'Zeta;',
+        'aacute;',
+        'aacute',
+        'acirc;',
+        'acirc',
+        'acute;',
+        'acute',
+        'aelig;',
+        'aelig',
+        'agrave;',
+        'agrave',
+        'alefsym;',
+        'alpha;',
+        'amp;',
+        'amp',
+        'and;',
+        'ang;',
+        'apos;',
+        'aring;',
+        'aring',
+        'asymp;',
+        'atilde;',
+        'atilde',
+        'auml;',
+        'auml',
+        'bdquo;',
+        'beta;',
+        'brvbar;',
+        'brvbar',
+        'bull;',
+        'cap;',
+        'ccedil;',
+        'ccedil',
+        'cedil;',
+        'cedil',
+        'cent;',
+        'cent',
+        'chi;',
+        'circ;',
+        'clubs;',
+        'cong;',
+        'copy;',
+        'copy',
+        'crarr;',
+        'cup;',
+        'curren;',
+        'curren',
+        'dArr;',
+        'dagger;',
+        'darr;',
+        'deg;',
+        'deg',
+        'delta;',
+        'diams;',
+        'divide;',
+        'divide',
+        'eacute;',
+        'eacute',
+        'ecirc;',
+        'ecirc',
+        'egrave;',
+        'egrave',
+        'empty;',
+        'emsp;',
+        'ensp;',
+        'epsilon;',
+        'equiv;',
+        'eta;',
+        'eth;',
+        'eth',
+        'euml;',
+        'euml',
+        'euro;',
+        'exist;',
+        'fnof;',
+        'forall;',
+        'frac12;',
+        'frac12',
+        'frac14;',
+        'frac14',
+        'frac34;',
+        'frac34',
+        'frasl;',
+        'gamma;',
+        'ge;',
+        'gt;',
+        'gt',
+        'hArr;',
+        'harr;',
+        'hearts;',
+        'hellip;',
+        'iacute;',
+        'iacute',
+        'icirc;',
+        'icirc',
+        'iexcl;',
+        'iexcl',
+        'igrave;',
+        'igrave',
+        'image;',
+        'infin;',
+        'int;',
+        'iota;',
+        'iquest;',
+        'iquest',
+        'isin;',
+        'iuml;',
+        'iuml',
+        'kappa;',
+        'lArr;',
+        'lambda;',
+        'lang;',
+        'laquo;',
+        'laquo',
+        'larr;',
+        'lceil;',
+        'ldquo;',
+        'le;',
+        'lfloor;',
+        'lowast;',
+        'loz;',
+        'lrm;',
+        'lsaquo;',
+        'lsquo;',
+        'lt;',
+        'lt',
+        'macr;',
+        'macr',
+        'mdash;',
+        'micro;',
+        'micro',
+        'middot;',
+        'middot',
+        'minus;',
+        'mu;',
+        'nabla;',
+        'nbsp;',
+        'nbsp',
+        'ndash;',
+        'ne;',
+        'ni;',
+        'not;',
+        'not',
+        'notin;',
+        'nsub;',
+        'ntilde;',
+        'ntilde',
+        'nu;',
+        'oacute;',
+        'oacute',
+        'ocirc;',
+        'ocirc',
+        'oelig;',
+        'ograve;',
+        'ograve',
+        'oline;',
+        'omega;',
+        'omicron;',
+        'oplus;',
+        'or;',
+        'ordf;',
+        'ordf',
+        'ordm;',
+        'ordm',
+        'oslash;',
+        'oslash',
+        'otilde;',
+        'otilde',
+        'otimes;',
+        'ouml;',
+        'ouml',
+        'para;',
+        'para',
+        'part;',
+        'permil;',
+        'perp;',
+        'phi;',
+        'pi;',
+        'piv;',
+        'plusmn;',
+        'plusmn',
+        'pound;',
+        'pound',
+        'prime;',
+        'prod;',
+        'prop;',
+        'psi;',
+        'quot;',
+        'quot',
+        'rArr;',
+        'radic;',
+        'rang;',
+        'raquo;',
+        'raquo',
+        'rarr;',
+        'rceil;',
+        'rdquo;',
+        'real;',
+        'reg;',
+        'reg',
+        'rfloor;',
+        'rho;',
+        'rlm;',
+        'rsaquo;',
+        'rsquo;',
+        'sbquo;',
+        'scaron;',
+        'sdot;',
+        'sect;',
+        'sect',
+        'shy;',
+        'shy',
+        'sigma;',
+        'sigmaf;',
+        'sim;',
+        'spades;',
+        'sub;',
+        'sube;',
+        'sum;',
+        'sup1;',
+        'sup1',
+        'sup2;',
+        'sup2',
+        'sup3;',
+        'sup3',
+        'sup;',
+        'supe;',
+        'szlig;',
+        'szlig',
+        'tau;',
+        'there4;',
+        'theta;',
+        'thetasym;',
+        'thinsp;',
+        'thorn;',
+        'thorn',
+        'tilde;',
+        'times;',
+        'times',
+        'trade;',
+        'uArr;',
+        'uacute;',
+        'uacute',
+        'uarr;',
+        'ucirc;',
+        'ucirc',
+        'ugrave;',
+        'ugrave',
+        'uml;',
+        'uml',
+        'upsih;',
+        'upsilon;',
+        'uuml;',
+        'uuml',
+        'weierp;',
+        'xi;',
+        'yacute;',
+        'yacute',
+        'yen;',
+        'yen',
+        'yuml;',
+        'yuml',
+        'zeta;',
+        'zwj;',
+        'zwnj;'
+    );
+
+    const PCDATA = 0;
+    const RCDATA = 1;
+    const CDATA = 2;
+    const PLAINTEXT = 3;
+
+    const DOCTYPE = 0;
+    const STARTTAG = 1;
+    const ENDTAG = 2;
+    const COMMENT = 3;
+    const CHARACTR = 4;
+    const EOF = 5;
+
+    public function __construct($data)
+    {
+        $this->data = $data;
+        $this->char = -1;
+        $this->EOF = strlen($data);
+        $this->tree = new HTML5TreeConstructer;
+        $this->content_model = self::PCDATA;
+
+        $this->state = 'data';
+
+        while ($this->state !== null) {
+            $this->{$this->state . 'State'}();
+        }
+    }
+
+    public function save()
+    {
+        return $this->tree->save();
+    }
+
+    private function char()
+    {
+        return ($this->char < $this->EOF)
+            ? $this->data[$this->char]
+            : false;
+    }
+
+    private function character($s, $l = 0)
+    {
+        if ($s + $l < $this->EOF) {
+            if ($l === 0) {
+                return $this->data[$s];
+            } else {
+                return substr($this->data, $s, $l);
+            }
+        }
+    }
+
+    private function characters($char_class, $start)
+    {
+        return preg_replace('#^([' . $char_class . ']+).*#s', '\\1', substr($this->data, $start));
+    }
+
+    private function dataState()
+    {
+        // Consume the next input character
+        $this->char++;
+        $char = $this->char();
+
+        if ($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
+            /* U+0026 AMPERSAND (&)
+            When the content model flag is set to one of the PCDATA or RCDATA
+            states: switch to the entity data state. Otherwise: treat it as per
+            the "anything else"    entry below. */
+            $this->state = 'entityData';
+
+        } elseif ($char === '-') {
+            /* If the content model flag is set to either the RCDATA state or
+            the CDATA state, and the escape flag is false, and there are at
+            least three characters before this one in the input stream, and the
+            last four characters in the input stream, including this one, are
+            U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
+            and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
+            if (($this->content_model === self::RCDATA || $this->content_model ===
+                    self::CDATA) && $this->escape === false &&
+                $this->char >= 3 && $this->character($this->char - 4, 4) === '<!--'
+            ) {
+                $this->escape = true;
+            }
+
+            /* In any case, emit the input character as a character token. Stay
+            in the data state. */
+            $this->emitToken(
+                array(
+                    'type' => self::CHARACTR,
+                    'data' => $char
+                )
+            );
+
+            /* U+003C LESS-THAN SIGN (<) */
+        } elseif ($char === '<' && ($this->content_model === self::PCDATA ||
+                (($this->content_model === self::RCDATA ||
+                        $this->content_model === self::CDATA) && $this->escape === false))
+        ) {
+            /* When the content model flag is set to the PCDATA state: switch
+            to the tag open state.
+
+            When the content model flag is set to either the RCDATA state or
+            the CDATA state and the escape flag is false: switch to the tag
+            open state.
+
+            Otherwise: treat it as per the "anything else" entry below. */
+            $this->state = 'tagOpen';
+
+            /* U+003E GREATER-THAN SIGN (>) */
+        } elseif ($char === '>') {
+            /* If the content model flag is set to either the RCDATA state or
+            the CDATA state, and the escape flag is true, and the last three
+            characters in the input stream including this one are U+002D
+            HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
+            set the escape flag to false. */
+            if (($this->content_model === self::RCDATA ||
+                    $this->content_model === self::CDATA) && $this->escape === true &&
+                $this->character($this->char, 3) === '-->'
+            ) {
+                $this->escape = false;
+            }
+
+            /* In any case, emit the input character as a character token.
+            Stay in the data state. */
+            $this->emitToken(
+                array(
+                    'type' => self::CHARACTR,
+                    'data' => $char
+                )
+            );
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Emit an end-of-file token. */
+            $this->EOF();
+
+        } elseif ($this->content_model === self::PLAINTEXT) {
+            /* When the content model flag is set to the PLAINTEXT state
+            THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of
+            the text and emit it as a character token. */
+            $this->emitToken(
+                array(
+                    'type' => self::CHARACTR,
+                    'data' => substr($this->data, $this->char)
+                )
+            );
+
+            $this->EOF();
+
+        } else {
+            /* Anything else
+            THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that
+            otherwise would also be treated as a character token and emit it
+            as a single character token. Stay in the data state. */
+            $len = strcspn($this->data, '<&', $this->char);
+            $char = substr($this->data, $this->char, $len);
+            $this->char += $len - 1;
+
+            $this->emitToken(
+                array(
+                    'type' => self::CHARACTR,
+                    'data' => $char
+                )
+            );
+
+            $this->state = 'data';
+        }
+    }
+
+    private function entityDataState()
+    {
+        // Attempt to consume an entity.
+        $entity = $this->entity();
+
+        // If nothing is returned, emit a U+0026 AMPERSAND character token.
+        // Otherwise, emit the character token that was returned.
+        $char = (!$entity) ? '&' : $entity;
+        $this->emitToken(
+            array(
+                'type' => self::CHARACTR,
+                'data' => $char
+            )
+        );
+
+        // Finally, switch to the data state.
+        $this->state = 'data';
+    }
+
+    private function tagOpenState()
+    {
+        switch ($this->content_model) {
+            case self::RCDATA:
+            case self::CDATA:
+                /* If the next input character is a U+002F SOLIDUS (/) character,
+                consume it and switch to the close tag open state. If the next
+                input character is not a U+002F SOLIDUS (/) character, emit a
+                U+003C LESS-THAN SIGN character token and switch to the data
+                state to process the next input character. */
+                if ($this->character($this->char + 1) === '/') {
+                    $this->char++;
+                    $this->state = 'closeTagOpen';
+
+                } else {
+                    $this->emitToken(
+                        array(
+                            'type' => self::CHARACTR,
+                            'data' => '<'
+                        )
+                    );
+
+                    $this->state = 'data';
+                }
+                break;
+
+            case self::PCDATA:
+                // If the content model flag is set to the PCDATA state
+                // Consume the next input character:
+                $this->char++;
+                $char = $this->char();
+
+                if ($char === '!') {
+                    /* U+0021 EXCLAMATION MARK (!)
+                    Switch to the markup declaration open state. */
+                    $this->state = 'markupDeclarationOpen';
+
+                } elseif ($char === '/') {
+                    /* U+002F SOLIDUS (/)
+                    Switch to the close tag open state. */
+                    $this->state = 'closeTagOpen';
+
+                } elseif (preg_match('/^[A-Za-z]$/', $char)) {
+                    /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
+                    Create a new start tag token, set its tag name to the lowercase
+                    version of the input character (add 0x0020 to the character's code
+                    point), then switch to the tag name state. (Don't emit the token
+                    yet; further details will be filled in before it is emitted.) */
+                    $this->token = array(
+                        'name' => strtolower($char),
+                        'type' => self::STARTTAG,
+                        'attr' => array()
+                    );
+
+                    $this->state = 'tagName';
+
+                } elseif ($char === '>') {
+                    /* U+003E GREATER-THAN SIGN (>)
+                    Parse error. Emit a U+003C LESS-THAN SIGN character token and a
+                    U+003E GREATER-THAN SIGN character token. Switch to the data state. */
+                    $this->emitToken(
+                        array(
+                            'type' => self::CHARACTR,
+                            'data' => '<>'
+                        )
+                    );
+
+                    $this->state = 'data';
+
+                } elseif ($char === '?') {
+                    /* U+003F QUESTION MARK (?)
+                    Parse error. Switch to the bogus comment state. */
+                    $this->state = 'bogusComment';
+
+                } else {
+                    /* Anything else
+                    Parse error. Emit a U+003C LESS-THAN SIGN character token and
+                    reconsume the current input character in the data state. */
+                    $this->emitToken(
+                        array(
+                            'type' => self::CHARACTR,
+                            'data' => '<'
+                        )
+                    );
+
+                    $this->char--;
+                    $this->state = 'data';
+                }
+                break;
+        }
+    }
+
+    private function closeTagOpenState()
+    {
+        $next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
+        $the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;
+
+        if (($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
+            (!$the_same || ($the_same && (!preg_match(
+                            '/[\t\n\x0b\x0c >\/]/',
+                            $this->character($this->char + 1 + strlen($next_node))
+                        ) || $this->EOF === $this->char)))
+        ) {
+            /* If the content model flag is set to the RCDATA or CDATA states then
+            examine the next few characters. If they do not match the tag name of
+            the last start tag token emitted (case insensitively), or if they do but
+            they are not immediately followed by one of the following characters:
+                * U+0009 CHARACTER TABULATION
+                * U+000A LINE FEED (LF)
+                * U+000B LINE TABULATION
+                * U+000C FORM FEED (FF)
+                * U+0020 SPACE
+                * U+003E GREATER-THAN SIGN (>)
+                * U+002F SOLIDUS (/)
+                * EOF
+            ...then there is a parse error. Emit a U+003C LESS-THAN SIGN character
+            token, a U+002F SOLIDUS character token, and switch to the data state
+            to process the next input character. */
+            $this->emitToken(
+                array(
+                    'type' => self::CHARACTR,
+                    'data' => '</'
+                )
+            );
+
+            $this->state = 'data';
+
+        } else {
+            /* Otherwise, if the content model flag is set to the PCDATA state,
+            or if the next few characters do match that tag name, consume the
+            next input character: */
+            $this->char++;
+            $char = $this->char();
+
+            if (preg_match('/^[A-Za-z]$/', $char)) {
+                /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
+                Create a new end tag token, set its tag name to the lowercase version
+                of the input character (add 0x0020 to the character's code point), then
+                switch to the tag name state. (Don't emit the token yet; further details
+                will be filled in before it is emitted.) */
+                $this->token = array(
+                    'name' => strtolower($char),
+                    'type' => self::ENDTAG
+                );
+
+                $this->state = 'tagName';
+
+            } elseif ($char === '>') {
+                /* U+003E GREATER-THAN SIGN (>)
+                Parse error. Switch to the data state. */
+                $this->state = 'data';
+
+            } elseif ($this->char === $this->EOF) {
+                /* EOF
+                Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F
+                SOLIDUS character token. Reconsume the EOF character in the data state. */
+                $this->emitToken(
+                    array(
+                        'type' => self::CHARACTR,
+                        'data' => '</'
+                    )
+                );
+
+                $this->char--;
+                $this->state = 'data';
+
+            } else {
+                /* Parse error. Switch to the bogus comment state. */
+                $this->state = 'bogusComment';
+            }
+        }
+    }
+
+    private function tagNameState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Switch to the before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the EOF
+            character in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } elseif ($char === '/') {
+            /* U+002F SOLIDUS (/)
+            Parse error unless this is a permitted slash. Switch to the before
+            attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current tag token's tag name.
+            Stay in the tag name state. */
+            $this->token['name'] .= strtolower($char);
+            $this->state = 'tagName';
+        }
+    }
+
+    private function beforeAttributeNameState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Stay in the before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($char === '/') {
+            /* U+002F SOLIDUS (/)
+            Parse error unless this is a permitted slash. Stay in the before
+            attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the EOF
+            character in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Start a new attribute in the current tag token. Set that attribute's
+            name to the current input character, and its value to the empty string.
+            Switch to the attribute name state. */
+            $this->token['attr'][] = array(
+                'name' => strtolower($char),
+                'value' => null
+            );
+
+            $this->state = 'attributeName';
+        }
+    }
+
+    private function attributeNameState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Stay in the before attribute name state. */
+            $this->state = 'afterAttributeName';
+
+        } elseif ($char === '=') {
+            /* U+003D EQUALS SIGN (=)
+            Switch to the before attribute value state. */
+            $this->state = 'beforeAttributeValue';
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($char === '/' && $this->character($this->char + 1) !== '>') {
+            /* U+002F SOLIDUS (/)
+            Parse error unless this is a permitted slash. Switch to the before
+            attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the EOF
+            character in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current attribute's name.
+            Stay in the attribute name state. */
+            $last = count($this->token['attr']) - 1;
+            $this->token['attr'][$last]['name'] .= strtolower($char);
+
+            $this->state = 'attributeName';
+        }
+    }
+
+    private function afterAttributeNameState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Stay in the after attribute name state. */
+            $this->state = 'afterAttributeName';
+
+        } elseif ($char === '=') {
+            /* U+003D EQUALS SIGN (=)
+            Switch to the before attribute value state. */
+            $this->state = 'beforeAttributeValue';
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($char === '/' && $this->character($this->char + 1) !== '>') {
+            /* U+002F SOLIDUS (/)
+            Parse error unless this is a permitted slash. Switch to the
+            before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the EOF
+            character in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Start a new attribute in the current tag token. Set that attribute's
+            name to the current input character, and its value to the empty string.
+            Switch to the attribute name state. */
+            $this->token['attr'][] = array(
+                'name' => strtolower($char),
+                'value' => null
+            );
+
+            $this->state = 'attributeName';
+        }
+    }
+
+    private function beforeAttributeValueState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Stay in the before attribute value state. */
+            $this->state = 'beforeAttributeValue';
+
+        } elseif ($char === '"') {
+            /* U+0022 QUOTATION MARK (")
+            Switch to the attribute value (double-quoted) state. */
+            $this->state = 'attributeValueDoubleQuoted';
+
+        } elseif ($char === '&') {
+            /* U+0026 AMPERSAND (&)
+            Switch to the attribute value (unquoted) state and reconsume
+            this input character. */
+            $this->char--;
+            $this->state = 'attributeValueUnquoted';
+
+        } elseif ($char === '\'') {
+            /* U+0027 APOSTROPHE (')
+            Switch to the attribute value (single-quoted) state. */
+            $this->state = 'attributeValueSingleQuoted';
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current attribute's value.
+            Switch to the attribute value (unquoted) state. */
+            $last = count($this->token['attr']) - 1;
+            $this->token['attr'][$last]['value'] .= $char;
+
+            $this->state = 'attributeValueUnquoted';
+        }
+    }
+
+    private function attributeValueDoubleQuotedState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if ($char === '"') {
+            /* U+0022 QUOTATION MARK (")
+            Switch to the before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($char === '&') {
+            /* U+0026 AMPERSAND (&)
+            Switch to the entity in attribute value state. */
+            $this->entityInAttributeValueState('double');
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the character
+            in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current attribute's value.
+            Stay in the attribute value (double-quoted) state. */
+            $last = count($this->token['attr']) - 1;
+            $this->token['attr'][$last]['value'] .= $char;
+
+            $this->state = 'attributeValueDoubleQuoted';
+        }
+    }
+
+    private function attributeValueSingleQuotedState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if ($char === '\'') {
+            /* U+0022 QUOTATION MARK (')
+            Switch to the before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($char === '&') {
+            /* U+0026 AMPERSAND (&)
+            Switch to the entity in attribute value state. */
+            $this->entityInAttributeValueState('single');
+
+        } elseif ($this->char === $this->EOF) {
+            /* EOF
+            Parse error. Emit the current tag token. Reconsume the character
+            in the data state. */
+            $this->emitToken($this->token);
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current attribute's value.
+            Stay in the attribute value (single-quoted) state. */
+            $last = count($this->token['attr']) - 1;
+            $this->token['attr'][$last]['value'] .= $char;
+
+            $this->state = 'attributeValueSingleQuoted';
+        }
+    }
+
+    private function attributeValueUnquotedState()
+    {
+        // Consume the next input character:
+        $this->char++;
+        $char = $this->character($this->char);
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            /* U+0009 CHARACTER TABULATION
+            U+000A LINE FEED (LF)
+            U+000B LINE TABULATION
+            U+000C FORM FEED (FF)
+            U+0020 SPACE
+            Switch to the before attribute name state. */
+            $this->state = 'beforeAttributeName';
+
+        } elseif ($char === '&') {
+            /* U+0026 AMPERSAND (&)
+            Switch to the entity in attribute value state. */
+            $this->entityInAttributeValueState();
+
+        } elseif ($char === '>') {
+            /* U+003E GREATER-THAN SIGN (>)
+            Emit the current tag token. Switch to the data state. */
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } else {
+            /* Anything else
+            Append the current input character to the current attribute's value.
+            Stay in the attribute value (unquoted) state. */
+            $last = count($this->token['attr']) - 1;
+            $this->token['attr'][$last]['value'] .= $char;
+
+            $this->state = 'attributeValueUnquoted';
+        }
+    }
+
+    private function entityInAttributeValueState()
+    {
+        // Attempt to consume an entity.
+        $entity = $this->entity();
+
+        // If nothing is returned, append a U+0026 AMPERSAND character to the
+        // current attribute's value. Otherwise, emit the character token that
+        // was returned.
+        $char = (!$entity)
+            ? '&'
+            : $entity;
+
+        $last = count($this->token['attr']) - 1;
+        $this->token['attr'][$last]['value'] .= $char;
+    }
+
+    private function bogusCommentState()
+    {
+        /* Consume every character up to the first U+003E GREATER-THAN SIGN
+        character (>) or the end of the file (EOF), whichever comes first. Emit
+        a comment token whose data is the concatenation of all the characters
+        starting from and including the character that caused the state machine
+        to switch into the bogus comment state, up to and including the last
+        consumed character before the U+003E character, if any, or up to the
+        end of the file otherwise. (If the comment was started by the end of
+        the file (EOF), the token is empty.) */
+        $data = $this->characters('^>', $this->char);
+        $this->emitToken(
+            array(
+                'data' => $data,
+                'type' => self::COMMENT
+            )
+        );
+
+        $this->char += strlen($data);
+
+        /* Switch to the data state. */
+        $this->state = 'data';
+
+        /* If the end of the file was reached, reconsume the EOF character. */
+        if ($this->char === $this->EOF) {
+            $this->char = $this->EOF - 1;
+        }
+    }
+
+    private function markupDeclarationOpenState()
+    {
+        /* If the next two characters are both U+002D HYPHEN-MINUS (-)
+        characters, consume those two characters, create a comment token whose
+        data is the empty string, and switch to the comment state. */
+        if ($this->character($this->char + 1, 2) === '--') {
+            $this->char += 2;
+            $this->state = 'comment';
+            $this->token = array(
+                'data' => null,
+                'type' => self::COMMENT
+            );
+
+            /* Otherwise if the next seven chacacters are a case-insensitive match
+            for the word "DOCTYPE", then consume those characters and switch to the
+            DOCTYPE state. */
+        } elseif (strtolower($this->character($this->char + 1, 7)) === 'doctype') {
+            $this->char += 7;
+            $this->state = 'doctype';
+
+            /* Otherwise, is is a parse error. Switch to the bogus comment state.
+            The next character that is consumed, if any, is the first character
+            that will be in the comment. */
+        } else {
+            $this->char++;
+            $this->state = 'bogusComment';
+        }
+    }
+
+    private function commentState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        /* U+002D HYPHEN-MINUS (-) */
+        if ($char === '-') {
+            /* Switch to the comment dash state  */
+            $this->state = 'commentDash';
+
+            /* EOF */
+        } elseif ($this->char === $this->EOF) {
+            /* Parse error. Emit the comment token. Reconsume the EOF character
+            in the data state. */
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+            /* Anything else */
+        } else {
+            /* Append the input character to the comment token's data. Stay in
+            the comment state. */
+            $this->token['data'] .= $char;
+        }
+    }
+
+    private function commentDashState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        /* U+002D HYPHEN-MINUS (-) */
+        if ($char === '-') {
+            /* Switch to the comment end state  */
+            $this->state = 'commentEnd';
+
+            /* EOF */
+        } elseif ($this->char === $this->EOF) {
+            /* Parse error. Emit the comment token. Reconsume the EOF character
+            in the data state. */
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+            /* Anything else */
+        } else {
+            /* Append a U+002D HYPHEN-MINUS (-) character and the input
+            character to the comment token's data. Switch to the comment state. */
+            $this->token['data'] .= '-' . $char;
+            $this->state = 'comment';
+        }
+    }
+
+    private function commentEndState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if ($char === '>') {
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($char === '-') {
+            $this->token['data'] .= '-';
+
+        } elseif ($this->char === $this->EOF) {
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            $this->token['data'] .= '--' . $char;
+            $this->state = 'comment';
+        }
+    }
+
+    private function doctypeState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            $this->state = 'beforeDoctypeName';
+
+        } else {
+            $this->char--;
+            $this->state = 'beforeDoctypeName';
+        }
+    }
+
+    private function beforeDoctypeNameState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            // Stay in the before DOCTYPE name state.
+
+        } elseif (preg_match('/^[a-z]$/', $char)) {
+            $this->token = array(
+                'name' => strtoupper($char),
+                'type' => self::DOCTYPE,
+                'error' => true
+            );
+
+            $this->state = 'doctypeName';
+
+        } elseif ($char === '>') {
+            $this->emitToken(
+                array(
+                    'name' => null,
+                    'type' => self::DOCTYPE,
+                    'error' => true
+                )
+            );
+
+            $this->state = 'data';
+
+        } elseif ($this->char === $this->EOF) {
+            $this->emitToken(
+                array(
+                    'name' => null,
+                    'type' => self::DOCTYPE,
+                    'error' => true
+                )
+            );
+
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            $this->token = array(
+                'name' => $char,
+                'type' => self::DOCTYPE,
+                'error' => true
+            );
+
+            $this->state = 'doctypeName';
+        }
+    }
+
+    private function doctypeNameState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            $this->state = 'AfterDoctypeName';
+
+        } elseif ($char === '>') {
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif (preg_match('/^[a-z]$/', $char)) {
+            $this->token['name'] .= strtoupper($char);
+
+        } elseif ($this->char === $this->EOF) {
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            $this->token['name'] .= $char;
+        }
+
+        $this->token['error'] = ($this->token['name'] === 'HTML')
+            ? false
+            : true;
+    }
+
+    private function afterDoctypeNameState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
+            // Stay in the DOCTYPE name state.
+
+        } elseif ($char === '>') {
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($this->char === $this->EOF) {
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            $this->token['error'] = true;
+            $this->state = 'bogusDoctype';
+        }
+    }
+
+    private function bogusDoctypeState()
+    {
+        /* Consume the next input character: */
+        $this->char++;
+        $char = $this->char();
+
+        if ($char === '>') {
+            $this->emitToken($this->token);
+            $this->state = 'data';
+
+        } elseif ($this->char === $this->EOF) {
+            $this->emitToken($this->token);
+            $this->char--;
+            $this->state = 'data';
+
+        } else {
+            // Stay in the bogus DOCTYPE state.
+        }
+    }
+
+    private function entity()
+    {
+        $start = $this->char;
+
+        // This section defines how to consume an entity. This definition is
+        // used when parsing entities in text and in attributes.
+
+        // The behaviour depends on the identity of the next character (the
+        // one immediately after the U+0026 AMPERSAND character):
+
+        switch ($this->character($this->char + 1)) {
+            // U+0023 NUMBER SIGN (#)
+            case '#':
+
+                // The behaviour further depends on the character after the
+                // U+0023 NUMBER SIGN:
+                switch ($this->character($this->char + 1)) {
+                    // U+0078 LATIN SMALL LETTER X
+                    // U+0058 LATIN CAPITAL LETTER X
+                    case 'x':
+                    case 'X':
+                        // Follow the steps below, but using the range of
+                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
+                        // NINE, U+0061 LATIN SMALL LETTER A through to U+0066
+                        // LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
+                        // A, through to U+0046 LATIN CAPITAL LETTER F (in other
+                        // words, 0-9, A-F, a-f).
+                        $char = 1;
+                        $char_class = '0-9A-Fa-f';
+                        break;
+
+                    // Anything else
+                    default:
+                        // Follow the steps below, but using the range of
+                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
+                        // NINE (i.e. just 0-9).
+                        $char = 0;
+                        $char_class = '0-9';
+                        break;
+                }
+
+                // Consume as many characters as match the range of characters
+                // given above.
+                $this->char++;
+                $e_name = $this->characters($char_class, $this->char + $char + 1);
+                $entity = $this->character($start, $this->char);
+                $cond = strlen($e_name) > 0;
+
+                // The rest of the parsing happens bellow.
+                break;
+
+            // Anything else
+            default:
+                // Consume the maximum number of characters possible, with the
+                // consumed characters case-sensitively matching one of the
+                // identifiers in the first column of the entities table.
+                $e_name = $this->characters('0-9A-Za-z;', $this->char + 1);
+                $len = strlen($e_name);
+
+                for ($c = 1; $c <= $len; $c++) {
+                    $id = substr($e_name, 0, $c);
+                    $this->char++;
+
+                    if (in_array($id, $this->entities)) {
+                        if ($e_name[$c - 1] !== ';') {
+                            if ($c < $len && $e_name[$c] == ';') {
+                                $this->char++; // consume extra semicolon
+                            }
+                        }
+                        $entity = $id;
+                        break;
+                    }
+                }
+
+                $cond = isset($entity);
+                // The rest of the parsing happens bellow.
+                break;
+        }
+
+        if (!$cond) {
+            // If no match can be made, then this is a parse error. No
+            // characters are consumed, and nothing is returned.
+            $this->char = $start;
+            return false;
+        }
+
+        // Return a character token for the character corresponding to the
+        // entity name (as given by the second column of the entities table).
+        return html_entity_decode('&' . $entity . ';', ENT_QUOTES, 'UTF-8');
+    }
+
+    private function emitToken($token)
+    {
+        $emit = $this->tree->emitToken($token);
+
+        if (is_int($emit)) {
+            $this->content_model = $emit;
+
+        } elseif ($token['type'] === self::ENDTAG) {
+            $this->content_model = self::PCDATA;
+        }
+    }
+
+    private function EOF()
+    {
+        $this->state = null;
+        $this->tree->emitToken(
+            array(
+                'type' => self::EOF
+            )
+        );
+    }
+}
+
+class HTML5TreeConstructer
+{
+    public $stack = array();
+
+    private $phase;
+    private $mode;
+    private $dom;
+    private $foster_parent = null;
+    private $a_formatting = array();
+
+    private $head_pointer = null;
+    private $form_pointer = null;
+
+    private $scoping = array('button', 'caption', 'html', 'marquee', 'object', 'table', 'td', 'th');
+    private $formatting = array(
+        'a',
+        'b',
+        'big',
+        'em',
+        'font',
+        'i',
+        'nobr',
+        's',
+        'small',
+        'strike',
+        'strong',
+        'tt',
+        'u'
+    );
+    private $special = array(
+        'address',
+        'area',
+        'base',
+        'basefont',
+        'bgsound',
+        'blockquote',
+        'body',
+        'br',
+        'center',
+        'col',
+        'colgroup',
+        'dd',
+        'dir',
+        'div',
+        'dl',
+        'dt',
+        'embed',
+        'fieldset',
+        'form',
+        'frame',
+        'frameset',
+        'h1',
+        'h2',
+        'h3',
+        'h4',
+        'h5',
+        'h6',
+        'head',
+        'hr',
+        'iframe',
+        'image',
+        'img',
+        'input',
+        'isindex',
+        'li',
+        'link',
+        'listing',
+        'menu',
+        'meta',
+        'noembed',
+        'noframes',
+        'noscript',
+        'ol',
+        'optgroup',
+        'option',
+        'p',
+        'param',
+        'plaintext',
+        'pre',
+        'script',
+        'select',
+        'spacer',
+        'style',
+        'tbody',
+        'textarea',
+        'tfoot',
+        'thead',
+        'title',
+        'tr',
+        'ul',
+        'wbr'
+    );
+
+    // The different phases.
+    const INIT_PHASE = 0;
+    const ROOT_PHASE = 1;
+    const MAIN_PHASE = 2;
+    const END_PHASE = 3;
+
+    // The different insertion modes for the main phase.
+    const BEFOR_HEAD = 0;
+    const IN_HEAD = 1;
+    const AFTER_HEAD = 2;
+    const IN_BODY = 3;
+    const IN_TABLE = 4;
+    const IN_CAPTION = 5;
+    const IN_CGROUP = 6;
+    const IN_TBODY = 7;
+    const IN_ROW = 8;
+    const IN_CELL = 9;
+    const IN_SELECT = 10;
+    const AFTER_BODY = 11;
+    const IN_FRAME = 12;
+    const AFTR_FRAME = 13;
+
+    // The different types of elements.
+    const SPECIAL = 0;
+    const SCOPING = 1;
+    const FORMATTING = 2;
+    const PHRASING = 3;
+
+    const MARKER = 0;
+
+    public function __construct()
+    {
+        $this->phase = self::INIT_PHASE;
+        $this->mode = self::BEFOR_HEAD;
+        $this->dom = new DOMDocument;
+
+        $this->dom->encoding = 'UTF-8';
+        $this->dom->preserveWhiteSpace = true;
+        $this->dom->substituteEntities = true;
+        $this->dom->strictErrorChecking = false;
+    }
+
+    // Process tag tokens
+    public function emitToken($token)
+    {
+        switch ($this->phase) {
+            case self::INIT_PHASE:
+                return $this->initPhase($token);
+                break;
+            case self::ROOT_PHASE:
+                return $this->rootElementPhase($token);
+                break;
+            case self::MAIN_PHASE:
+                return $this->mainPhase($token);
+                break;
+            case self::END_PHASE :
+                return $this->trailingEndPhase($token);
+                break;
+        }
+    }
+
+    private function initPhase($token)
+    {
+        /* Initially, the tree construction stage must handle each token
+        emitted from the tokenisation stage as follows: */
+
+        /* A DOCTYPE token that is marked as being in error
+        A comment token
+        A start tag token
+        An end tag token
+        A character token that is not one of one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE
+        An end-of-file token */
+        if ((isset($token['error']) && $token['error']) ||
+            $token['type'] === HTML5::COMMENT ||
+            $token['type'] === HTML5::STARTTAG ||
+            $token['type'] === HTML5::ENDTAG ||
+            $token['type'] === HTML5::EOF ||
+            ($token['type'] === HTML5::CHARACTR && isset($token['data']) &&
+                !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data']))
+        ) {
+            /* This specification does not define how to handle this case. In
+            particular, user agents may ignore the entirety of this specification
+            altogether for such documents, and instead invoke special parse modes
+            with a greater emphasis on backwards compatibility. */
+
+            $this->phase = self::ROOT_PHASE;
+            return $this->rootElementPhase($token);
+
+            /* A DOCTYPE token marked as being correct */
+        } elseif (isset($token['error']) && !$token['error']) {
+            /* Append a DocumentType node to the Document  node, with the name
+            attribute set to the name given in the DOCTYPE token (which will be
+            "HTML"), and the other attributes specific to DocumentType objects
+            set to null, empty lists, or the empty string as appropriate. */
+            $doctype = new DOMDocumentType(null, null, 'HTML');
+
+            /* Then, switch to the root element phase of the tree construction
+            stage. */
+            $this->phase = self::ROOT_PHASE;
+
+            /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE */
+        } elseif (isset($token['data']) && preg_match(
+                '/^[\t\n\x0b\x0c ]+$/',
+                $token['data']
+            )
+        ) {
+            /* Append that character  to the Document node. */
+            $text = $this->dom->createTextNode($token['data']);
+            $this->dom->appendChild($text);
+        }
+    }
+
+    private function rootElementPhase($token)
+    {
+        /* After the initial phase, as each token is emitted from the tokenisation
+        stage, it must be processed as described in this section. */
+
+        /* A DOCTYPE token */
+        if ($token['type'] === HTML5::DOCTYPE) {
+            // Parse error. Ignore the token.
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the Document object with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->dom->appendChild($comment);
+
+            /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE */
+        } elseif ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append that character  to the Document node. */
+            $text = $this->dom->createTextNode($token['data']);
+            $this->dom->appendChild($text);
+
+            /* A character token that is not one of U+0009 CHARACTER TABULATION,
+                U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED
+                (FF), or U+0020 SPACE
+            A start tag token
+            An end tag token
+            An end-of-file token */
+        } elseif (($token['type'] === HTML5::CHARACTR &&
+                !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
+            $token['type'] === HTML5::STARTTAG ||
+            $token['type'] === HTML5::ENDTAG ||
+            $token['type'] === HTML5::EOF
+        ) {
+            /* Create an HTMLElement node with the tag name html, in the HTML
+            namespace. Append it to the Document object. Switch to the main
+            phase and reprocess the current token. */
+            $html = $this->dom->createElement('html');
+            $this->dom->appendChild($html);
+            $this->stack[] = $html;
+
+            $this->phase = self::MAIN_PHASE;
+            return $this->mainPhase($token);
+        }
+    }
+
+    private function mainPhase($token)
+    {
+        /* Tokens in the main phase must be handled as follows: */
+
+        /* A DOCTYPE token */
+        if ($token['type'] === HTML5::DOCTYPE) {
+            // Parse error. Ignore the token.
+
+            /* A start tag token with the tag name "html" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'html') {
+            /* If this start tag token was not the first start tag token, then
+            it is a parse error. */
+
+            /* For each attribute on the token, check to see if the attribute
+            is already present on the top element of the stack of open elements.
+            If it is not, add the attribute and its corresponding value to that
+            element. */
+            foreach ($token['attr'] as $attr) {
+                if (!$this->stack[0]->hasAttribute($attr['name'])) {
+                    $this->stack[0]->setAttribute($attr['name'], $attr['value']);
+                }
+            }
+
+            /* An end-of-file token */
+        } elseif ($token['type'] === HTML5::EOF) {
+            /* Generate implied end tags. */
+            $this->generateImpliedEndTags();
+
+            /* Anything else. */
+        } else {
+            /* Depends on the insertion mode: */
+            switch ($this->mode) {
+                case self::BEFOR_HEAD:
+                    return $this->beforeHead($token);
+                    break;
+                case self::IN_HEAD:
+                    return $this->inHead($token);
+                    break;
+                case self::AFTER_HEAD:
+                    return $this->afterHead($token);
+                    break;
+                case self::IN_BODY:
+                    return $this->inBody($token);
+                    break;
+                case self::IN_TABLE:
+                    return $this->inTable($token);
+                    break;
+                case self::IN_CAPTION:
+                    return $this->inCaption($token);
+                    break;
+                case self::IN_CGROUP:
+                    return $this->inColumnGroup($token);
+                    break;
+                case self::IN_TBODY:
+                    return $this->inTableBody($token);
+                    break;
+                case self::IN_ROW:
+                    return $this->inRow($token);
+                    break;
+                case self::IN_CELL:
+                    return $this->inCell($token);
+                    break;
+                case self::IN_SELECT:
+                    return $this->inSelect($token);
+                    break;
+                case self::AFTER_BODY:
+                    return $this->afterBody($token);
+                    break;
+                case self::IN_FRAME:
+                    return $this->inFrameset($token);
+                    break;
+                case self::AFTR_FRAME:
+                    return $this->afterFrameset($token);
+                    break;
+                case self::END_PHASE:
+                    return $this->trailingEndPhase($token);
+                    break;
+            }
+        }
+    }
+
+    private function beforeHead($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+            /* A start tag token with the tag name "head" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') {
+            /* Create an element for the token, append the new element to the
+            current node and push it onto the stack of open elements. */
+            $element = $this->insertElement($token);
+
+            /* Set the head element pointer to this new element node. */
+            $this->head_pointer = $element;
+
+            /* Change the insertion mode to "in head". */
+            $this->mode = self::IN_HEAD;
+
+            /* A start tag token whose tag name is one of: "base", "link", "meta",
+            "script", "style", "title". Or an end tag with the tag name "html".
+            Or a character token that is not one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE. Or any other start tag token */
+        } elseif ($token['type'] === HTML5::STARTTAG ||
+            ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') ||
+            ($token['type'] === HTML5::CHARACTR && !preg_match(
+                    '/^[\t\n\x0b\x0c ]$/',
+                    $token['data']
+                ))
+        ) {
+            /* Act as if a start tag token with the tag name "head" and no
+            attributes had been seen, then reprocess the current token. */
+            $this->beforeHead(
+                array(
+                    'name' => 'head',
+                    'type' => HTML5::STARTTAG,
+                    'attr' => array()
+                )
+            );
+
+            return $this->inHead($token);
+
+            /* Any other end tag */
+        } elseif ($token['type'] === HTML5::ENDTAG) {
+            /* Parse error. Ignore the token. */
+        }
+    }
+
+    private function inHead($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE.
+
+        THIS DIFFERS FROM THE SPEC: If the current node is either a title, style
+        or script element, append the character to the current node regardless
+        of its content. */
+        if (($token['type'] === HTML5::CHARACTR &&
+                preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) || (
+                $token['type'] === HTML5::CHARACTR && in_array(
+                    end($this->stack)->nodeName,
+                    array('title', 'style', 'script')
+                ))
+        ) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            in_array($token['name'], array('title', 'style', 'script'))
+        ) {
+            array_pop($this->stack);
+            return HTML5::PCDATA;
+
+            /* A start tag with the tag name "title" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'title') {
+            /* Create an element for the token and append the new element to the
+            node pointed to by the head element pointer, or, if that is null
+            (innerHTML case), to the current node. */
+            if ($this->head_pointer !== null) {
+                $element = $this->insertElement($token, false);
+                $this->head_pointer->appendChild($element);
+
+            } else {
+                $element = $this->insertElement($token);
+            }
+
+            /* Switch the tokeniser's content model flag  to the RCDATA state. */
+            return HTML5::RCDATA;
+
+            /* A start tag with the tag name "style" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'style') {
+            /* Create an element for the token and append the new element to the
+            node pointed to by the head element pointer, or, if that is null
+            (innerHTML case), to the current node. */
+            if ($this->head_pointer !== null) {
+                $element = $this->insertElement($token, false);
+                $this->head_pointer->appendChild($element);
+
+            } else {
+                $this->insertElement($token);
+            }
+
+            /* Switch the tokeniser's content model flag  to the CDATA state. */
+            return HTML5::CDATA;
+
+            /* A start tag with the tag name "script" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'script') {
+            /* Create an element for the token. */
+            $element = $this->insertElement($token, false);
+            $this->head_pointer->appendChild($element);
+
+            /* Switch the tokeniser's content model flag  to the CDATA state. */
+            return HTML5::CDATA;
+
+            /* A start tag with the tag name "base", "link", or "meta" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array('base', 'link', 'meta')
+            )
+        ) {
+            /* Create an element for the token and append the new element to the
+            node pointed to by the head element pointer, or, if that is null
+            (innerHTML case), to the current node. */
+            if ($this->head_pointer !== null) {
+                $element = $this->insertElement($token, false);
+                $this->head_pointer->appendChild($element);
+                array_pop($this->stack);
+
+            } else {
+                $this->insertElement($token);
+            }
+
+            /* An end tag with the tag name "head" */
+        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'head') {
+            /* If the current node is a head element, pop the current node off
+            the stack of open elements. */
+            if ($this->head_pointer->isSameNode(end($this->stack))) {
+                array_pop($this->stack);
+
+                /* Otherwise, this is a parse error. */
+            } else {
+                // k
+            }
+
+            /* Change the insertion mode to "after head". */
+            $this->mode = self::AFTER_HEAD;
+
+            /* A start tag with the tag name "head" or an end tag except "html". */
+        } elseif (($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') ||
+            ($token['type'] === HTML5::ENDTAG && $token['name'] !== 'html')
+        ) {
+            // Parse error. Ignore the token.
+
+            /* Anything else */
+        } else {
+            /* If the current node is a head element, act as if an end tag
+            token with the tag name "head" had been seen. */
+            if ($this->head_pointer->isSameNode(end($this->stack))) {
+                $this->inHead(
+                    array(
+                        'name' => 'head',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+
+                /* Otherwise, change the insertion mode to "after head". */
+            } else {
+                $this->mode = self::AFTER_HEAD;
+            }
+
+            /* Then, reprocess the current token. */
+            return $this->afterHead($token);
+        }
+    }
+
+    private function afterHead($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+            /* A start tag token with the tag name "body" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'body') {
+            /* Insert a body element for the token. */
+            $this->insertElement($token);
+
+            /* Change the insertion mode to "in body". */
+            $this->mode = self::IN_BODY;
+
+            /* A start tag token with the tag name "frameset" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'frameset') {
+            /* Insert a frameset element for the token. */
+            $this->insertElement($token);
+
+            /* Change the insertion mode to "in frameset". */
+            $this->mode = self::IN_FRAME;
+
+            /* A start tag token whose tag name is one of: "base", "link", "meta",
+            "script", "style", "title" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array('base', 'link', 'meta', 'script', 'style', 'title')
+            )
+        ) {
+            /* Parse error. Switch the insertion mode back to "in head" and
+            reprocess the token. */
+            $this->mode = self::IN_HEAD;
+            return $this->inHead($token);
+
+            /* Anything else */
+        } else {
+            /* Act as if a start tag token with the tag name "body" and no
+            attributes had been seen, and then reprocess the current token. */
+            $this->afterHead(
+                array(
+                    'name' => 'body',
+                    'type' => HTML5::STARTTAG,
+                    'attr' => array()
+                )
+            );
+
+            return $this->inBody($token);
+        }
+    }
+
+    private function inBody($token)
+    {
+        /* Handle the token as follows: */
+
+        switch ($token['type']) {
+            /* A character token */
+            case HTML5::CHARACTR:
+                /* Reconstruct the active formatting elements, if any. */
+                $this->reconstructActiveFormattingElements();
+
+                /* Append the token's character to the current node. */
+                $this->insertText($token['data']);
+                break;
+
+            /* A comment token */
+            case HTML5::COMMENT:
+                /* Append a Comment node to the current node with the data
+                attribute set to the data given in the comment token. */
+                $this->insertComment($token['data']);
+                break;
+
+            case HTML5::STARTTAG:
+                switch ($token['name']) {
+                    /* A start tag token whose tag name is one of: "script",
+                    "style" */
+                    case 'script':
+                    case 'style':
+                        /* Process the token as if the insertion mode had been "in
+                        head". */
+                        return $this->inHead($token);
+                        break;
+
+                    /* A start tag token whose tag name is one of: "base", "link",
+                    "meta", "title" */
+                    case 'base':
+                    case 'link':
+                    case 'meta':
+                    case 'title':
+                        /* Parse error. Process the token as if the insertion mode
+                        had    been "in head". */
+                        return $this->inHead($token);
+                        break;
+
+                    /* A start tag token with the tag name "body" */
+                    case 'body':
+                        /* Parse error. If the second element on the stack of open
+                        elements is not a body element, or, if the stack of open
+                        elements has only one node on it, then ignore the token.
+                        (innerHTML case) */
+                        if (count($this->stack) === 1 || $this->stack[1]->nodeName !== 'body') {
+                            // Ignore
+
+                            /* Otherwise, for each attribute on the token, check to see
+                            if the attribute is already present on the body element (the
+                            second element)    on the stack of open elements. If it is not,
+                            add the attribute and its corresponding value to that
+                            element. */
+                        } else {
+                            foreach ($token['attr'] as $attr) {
+                                if (!$this->stack[1]->hasAttribute($attr['name'])) {
+                                    $this->stack[1]->setAttribute($attr['name'], $attr['value']);
+                                }
+                            }
+                        }
+                        break;
+
+                    /* A start tag whose tag name is one of: "address",
+                    "blockquote", "center", "dir", "div", "dl", "fieldset",
+                    "listing", "menu", "ol", "p", "ul" */
+                    case 'address':
+                    case 'blockquote':
+                    case 'center':
+                    case 'dir':
+                    case 'div':
+                    case 'dl':
+                    case 'fieldset':
+                    case 'listing':
+                    case 'menu':
+                    case 'ol':
+                    case 'p':
+                    case 'ul':
+                        /* If the stack of open elements has a p element in scope,
+                        then act as if an end tag with the tag name p had been
+                        seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+                        break;
+
+                    /* A start tag whose tag name is "form" */
+                    case 'form':
+                        /* If the form element pointer is not null, ignore the
+                        token with a parse error. */
+                        if ($this->form_pointer !== null) {
+                            // Ignore.
+
+                            /* Otherwise: */
+                        } else {
+                            /* If the stack of open elements has a p element in
+                            scope, then act as if an end tag with the tag name p
+                            had been seen. */
+                            if ($this->elementInScope('p')) {
+                                $this->emitToken(
+                                    array(
+                                        'name' => 'p',
+                                        'type' => HTML5::ENDTAG
+                                    )
+                                );
+                            }
+
+                            /* Insert an HTML element for the token, and set the
+                            form element pointer to point to the element created. */
+                            $element = $this->insertElement($token);
+                            $this->form_pointer = $element;
+                        }
+                        break;
+
+                    /* A start tag whose tag name is "li", "dd" or "dt" */
+                    case 'li':
+                    case 'dd':
+                    case 'dt':
+                        /* If the stack of open elements has a p  element in scope,
+                        then act as if an end tag with the tag name p had been
+                        seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        $stack_length = count($this->stack) - 1;
+
+                        for ($n = $stack_length; 0 <= $n; $n--) {
+                            /* 1. Initialise node to be the current node (the
+                            bottommost node of the stack). */
+                            $stop = false;
+                            $node = $this->stack[$n];
+                            $cat = $this->getElementCategory($node->tagName);
+
+                            /* 2. If node is an li, dd or dt element, then pop all
+                            the    nodes from the current node up to node, including
+                            node, then stop this algorithm. */
+                            if ($token['name'] === $node->tagName || ($token['name'] !== 'li'
+                                    && ($node->tagName === 'dd' || $node->tagName === 'dt'))
+                            ) {
+                                for ($x = $stack_length; $x >= $n; $x--) {
+                                    array_pop($this->stack);
+                                }
+
+                                break;
+                            }
+
+                            /* 3. If node is not in the formatting category, and is
+                            not    in the phrasing category, and is not an address or
+                            div element, then stop this algorithm. */
+                            if ($cat !== self::FORMATTING && $cat !== self::PHRASING &&
+                                $node->tagName !== 'address' && $node->tagName !== 'div'
+                            ) {
+                                break;
+                            }
+                        }
+
+                        /* Finally, insert an HTML element with the same tag
+                        name as the    token's. */
+                        $this->insertElement($token);
+                        break;
+
+                    /* A start tag token whose tag name is "plaintext" */
+                    case 'plaintext':
+                        /* If the stack of open elements has a p  element in scope,
+                        then act as if an end tag with the tag name p had been
+                        seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        return HTML5::PLAINTEXT;
+                        break;
+
+                    /* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",
+                    "h5", "h6" */
+                    case 'h1':
+                    case 'h2':
+                    case 'h3':
+                    case 'h4':
+                    case 'h5':
+                    case 'h6':
+                        /* If the stack of open elements has a p  element in scope,
+                        then act as if an end tag with the tag name p had been seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* If the stack of open elements has in scope an element whose
+                        tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
+                        this is a parse error; pop elements from the stack until an
+                        element with one of those tag names has been popped from the
+                        stack. */
+                        while ($this->elementInScope(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))) {
+                            array_pop($this->stack);
+                        }
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+                        break;
+
+                    /* A start tag whose tag name is "a" */
+                    case 'a':
+                        /* If the list of active formatting elements contains
+                        an element whose tag name is "a" between the end of the
+                        list and the last marker on the list (or the start of
+                        the list if there is no marker on the list), then this
+                        is a parse error; act as if an end tag with the tag name
+                        "a" had been seen, then remove that element from the list
+                        of active formatting elements and the stack of open
+                        elements if the end tag didn't already remove it (it
+                        might not have if the element is not in table scope). */
+                        $leng = count($this->a_formatting);
+
+                        for ($n = $leng - 1; $n >= 0; $n--) {
+                            if ($this->a_formatting[$n] === self::MARKER) {
+                                break;
+
+                            } elseif ($this->a_formatting[$n]->nodeName === 'a') {
+                                $this->emitToken(
+                                    array(
+                                        'name' => 'a',
+                                        'type' => HTML5::ENDTAG
+                                    )
+                                );
+                                break;
+                            }
+                        }
+
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $el = $this->insertElement($token);
+
+                        /* Add that element to the list of active formatting
+                        elements. */
+                        $this->a_formatting[] = $el;
+                        break;
+
+                    /* A start tag whose tag name is one of: "b", "big", "em", "font",
+                    "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
+                    case 'b':
+                    case 'big':
+                    case 'em':
+                    case 'font':
+                    case 'i':
+                    case 'nobr':
+                    case 's':
+                    case 'small':
+                    case 'strike':
+                    case 'strong':
+                    case 'tt':
+                    case 'u':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $el = $this->insertElement($token);
+
+                        /* Add that element to the list of active formatting
+                        elements. */
+                        $this->a_formatting[] = $el;
+                        break;
+
+                    /* A start tag token whose tag name is "button" */
+                    case 'button':
+                        /* If the stack of open elements has a button element in scope,
+                        then this is a parse error; act as if an end tag with the tag
+                        name "button" had been seen, then reprocess the token. (We don't
+                        do that. Unnecessary.) */
+                        if ($this->elementInScope('button')) {
+                            $this->inBody(
+                                array(
+                                    'name' => 'button',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Insert a marker at the end of the list of active
+                        formatting elements. */
+                        $this->a_formatting[] = self::MARKER;
+                        break;
+
+                    /* A start tag token whose tag name is one of: "marquee", "object" */
+                    case 'marquee':
+                    case 'object':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Insert a marker at the end of the list of active
+                        formatting elements. */
+                        $this->a_formatting[] = self::MARKER;
+                        break;
+
+                    /* A start tag token whose tag name is "xmp" */
+                    case 'xmp':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Switch the content model flag to the CDATA state. */
+                        return HTML5::CDATA;
+                        break;
+
+                    /* A start tag whose tag name is "table" */
+                    case 'table':
+                        /* If the stack of open elements has a p element in scope,
+                        then act as if an end tag with the tag name p had been seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Change the insertion mode to "in table". */
+                        $this->mode = self::IN_TABLE;
+                        break;
+
+                    /* A start tag whose tag name is one of: "area", "basefont",
+                    "bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
+                    case 'area':
+                    case 'basefont':
+                    case 'bgsound':
+                    case 'br':
+                    case 'embed':
+                    case 'img':
+                    case 'param':
+                    case 'spacer':
+                    case 'wbr':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Immediately pop the current node off the stack of open elements. */
+                        array_pop($this->stack);
+                        break;
+
+                    /* A start tag whose tag name is "hr" */
+                    case 'hr':
+                        /* If the stack of open elements has a p element in scope,
+                        then act as if an end tag with the tag name p had been seen. */
+                        if ($this->elementInScope('p')) {
+                            $this->emitToken(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Immediately pop the current node off the stack of open elements. */
+                        array_pop($this->stack);
+                        break;
+
+                    /* A start tag whose tag name is "image" */
+                    case 'image':
+                        /* Parse error. Change the token's tag name to "img" and
+                        reprocess it. (Don't ask.) */
+                        $token['name'] = 'img';
+                        return $this->inBody($token);
+                        break;
+
+                    /* A start tag whose tag name is "input" */
+                    case 'input':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an input element for the token. */
+                        $element = $this->insertElement($token, false);
+
+                        /* If the form element pointer is not null, then associate the
+                        input element with the form element pointed to by the form
+                        element pointer. */
+                        $this->form_pointer !== null
+                            ? $this->form_pointer->appendChild($element)
+                            : end($this->stack)->appendChild($element);
+
+                        /* Pop that input element off the stack of open elements. */
+                        array_pop($this->stack);
+                        break;
+
+                    /* A start tag whose tag name is "isindex" */
+                    case 'isindex':
+                        /* Parse error. */
+                        // w/e
+
+                        /* If the form element pointer is not null,
+                        then ignore the token. */
+                        if ($this->form_pointer === null) {
+                            /* Act as if a start tag token with the tag name "form" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'body',
+                                    'type' => HTML5::STARTTAG,
+                                    'attr' => array()
+                                )
+                            );
+
+                            /* Act as if a start tag token with the tag name "hr" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'hr',
+                                    'type' => HTML5::STARTTAG,
+                                    'attr' => array()
+                                )
+                            );
+
+                            /* Act as if a start tag token with the tag name "p" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::STARTTAG,
+                                    'attr' => array()
+                                )
+                            );
+
+                            /* Act as if a start tag token with the tag name "label"
+                            had been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'label',
+                                    'type' => HTML5::STARTTAG,
+                                    'attr' => array()
+                                )
+                            );
+
+                            /* Act as if a stream of character tokens had been seen. */
+                            $this->insertText(
+                                'This is a searchable index. ' .
+                                'Insert your search keywords here: '
+                            );
+
+                            /* Act as if a start tag token with the tag name "input"
+                            had been seen, with all the attributes from the "isindex"
+                            token, except with the "name" attribute set to the value
+                            "isindex" (ignoring any explicit "name" attribute). */
+                            $attr = $token['attr'];
+                            $attr[] = array('name' => 'name', 'value' => 'isindex');
+
+                            $this->inBody(
+                                array(
+                                    'name' => 'input',
+                                    'type' => HTML5::STARTTAG,
+                                    'attr' => $attr
+                                )
+                            );
+
+                            /* Act as if a stream of character tokens had been seen
+                            (see below for what they should say). */
+                            $this->insertText(
+                                'This is a searchable index. ' .
+                                'Insert your search keywords here: '
+                            );
+
+                            /* Act as if an end tag token with the tag name "label"
+                            had been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'label',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+
+                            /* Act as if an end tag token with the tag name "p" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'p',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+
+                            /* Act as if a start tag token with the tag name "hr" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'hr',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+
+                            /* Act as if an end tag token with the tag name "form" had
+                            been seen. */
+                            $this->inBody(
+                                array(
+                                    'name' => 'form',
+                                    'type' => HTML5::ENDTAG
+                                )
+                            );
+                        }
+                        break;
+
+                    /* A start tag whose tag name is "textarea" */
+                    case 'textarea':
+                        $this->insertElement($token);
+
+                        /* Switch the tokeniser's content model flag to the
+                        RCDATA state. */
+                        return HTML5::RCDATA;
+                        break;
+
+                    /* A start tag whose tag name is one of: "iframe", "noembed",
+                    "noframes" */
+                    case 'iframe':
+                    case 'noembed':
+                    case 'noframes':
+                        $this->insertElement($token);
+
+                        /* Switch the tokeniser's content model flag to the CDATA state. */
+                        return HTML5::CDATA;
+                        break;
+
+                    /* A start tag whose tag name is "select" */
+                    case 'select':
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        /* Insert an HTML element for the token. */
+                        $this->insertElement($token);
+
+                        /* Change the insertion mode to "in select". */
+                        $this->mode = self::IN_SELECT;
+                        break;
+
+                    /* A start or end tag whose tag name is one of: "caption", "col",
+                    "colgroup", "frame", "frameset", "head", "option", "optgroup",
+                    "tbody", "td", "tfoot", "th", "thead", "tr". */
+                    case 'caption':
+                    case 'col':
+                    case 'colgroup':
+                    case 'frame':
+                    case 'frameset':
+                    case 'head':
+                    case 'option':
+                    case 'optgroup':
+                    case 'tbody':
+                    case 'td':
+                    case 'tfoot':
+                    case 'th':
+                    case 'thead':
+                    case 'tr':
+                        // Parse error. Ignore the token.
+                        break;
+
+                    /* A start or end tag whose tag name is one of: "event-source",
+                    "section", "nav", "article", "aside", "header", "footer",
+                    "datagrid", "command" */
+                    case 'event-source':
+                    case 'section':
+                    case 'nav':
+                    case 'article':
+                    case 'aside':
+                    case 'header':
+                    case 'footer':
+                    case 'datagrid':
+                    case 'command':
+                        // Work in progress!
+                        break;
+
+                    /* A start tag token not covered by the previous entries */
+                    default:
+                        /* Reconstruct the active formatting elements, if any. */
+                        $this->reconstructActiveFormattingElements();
+
+                        $this->insertElement($token, true, true);
+                        break;
+                }
+                break;
+
+            case HTML5::ENDTAG:
+                switch ($token['name']) {
+                    /* An end tag with the tag name "body" */
+                    case 'body':
+                        /* If the second element in the stack of open elements is
+                        not a body element, this is a parse error. Ignore the token.
+                        (innerHTML case) */
+                        if (count($this->stack) < 2 || $this->stack[1]->nodeName !== 'body') {
+                            // Ignore.
+
+                            /* If the current node is not the body element, then this
+                            is a parse error. */
+                        } elseif (end($this->stack)->nodeName !== 'body') {
+                            // Parse error.
+                        }
+
+                        /* Change the insertion mode to "after body". */
+                        $this->mode = self::AFTER_BODY;
+                        break;
+
+                    /* An end tag with the tag name "html" */
+                    case 'html':
+                        /* Act as if an end tag with tag name "body" had been seen,
+                        then, if that token wasn't ignored, reprocess the current
+                        token. */
+                        $this->inBody(
+                            array(
+                                'name' => 'body',
+                                'type' => HTML5::ENDTAG
+                            )
+                        );
+
+                        return $this->afterBody($token);
+                        break;
+
+                    /* An end tag whose tag name is one of: "address", "blockquote",
+                    "center", "dir", "div", "dl", "fieldset", "listing", "menu",
+                    "ol", "pre", "ul" */
+                    case 'address':
+                    case 'blockquote':
+                    case 'center':
+                    case 'dir':
+                    case 'div':
+                    case 'dl':
+                    case 'fieldset':
+                    case 'listing':
+                    case 'menu':
+                    case 'ol':
+                    case 'pre':
+                    case 'ul':
+                        /* If the stack of open elements has an element in scope
+                        with the same tag name as that of the token, then generate
+                        implied end tags. */
+                        if ($this->elementInScope($token['name'])) {
+                            $this->generateImpliedEndTags();
+
+                            /* Now, if the current node is not an element with
+                            the same tag name as that of the token, then this
+                            is a parse error. */
+                            // w/e
+
+                            /* If the stack of open elements has an element in
+                            scope with the same tag name as that of the token,
+                            then pop elements from this stack until an element
+                            with that tag name has been popped from the stack. */
+                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                                if ($this->stack[$n]->nodeName === $token['name']) {
+                                    $n = -1;
+                                }
+
+                                array_pop($this->stack);
+                            }
+                        }
+                        break;
+
+                    /* An end tag whose tag name is "form" */
+                    case 'form':
+                        /* If the stack of open elements has an element in scope
+                        with the same tag name as that of the token, then generate
+                        implied    end tags. */
+                        if ($this->elementInScope($token['name'])) {
+                            $this->generateImpliedEndTags();
+
+                        }
+
+                        if (end($this->stack)->nodeName !== $token['name']) {
+                            /* Now, if the current node is not an element with the
+                            same tag name as that of the token, then this is a parse
+                            error. */
+                            // w/e
+
+                        } else {
+                            /* Otherwise, if the current node is an element with
+                            the same tag name as that of the token pop that element
+                            from the stack. */
+                            array_pop($this->stack);
+                        }
+
+                        /* In any case, set the form element pointer to null. */
+                        $this->form_pointer = null;
+                        break;
+
+                    /* An end tag whose tag name is "p" */
+                    case 'p':
+                        /* If the stack of open elements has a p element in scope,
+                        then generate implied end tags, except for p elements. */
+                        if ($this->elementInScope('p')) {
+                            $this->generateImpliedEndTags(array('p'));
+
+                            /* If the current node is not a p element, then this is
+                            a parse error. */
+                            // k
+
+                            /* If the stack of open elements has a p element in
+                            scope, then pop elements from this stack until the stack
+                            no longer has a p element in scope. */
+                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                                if ($this->elementInScope('p')) {
+                                    array_pop($this->stack);
+
+                                } else {
+                                    break;
+                                }
+                            }
+                        }
+                        break;
+
+                    /* An end tag whose tag name is "dd", "dt", or "li" */
+                    case 'dd':
+                    case 'dt':
+                    case 'li':
+                        /* If the stack of open elements has an element in scope
+                        whose tag name matches the tag name of the token, then
+                        generate implied end tags, except for elements with the
+                        same tag name as the token. */
+                        if ($this->elementInScope($token['name'])) {
+                            $this->generateImpliedEndTags(array($token['name']));
+
+                            /* If the current node is not an element with the same
+                            tag name as the token, then this is a parse error. */
+                            // w/e
+
+                            /* If the stack of open elements has an element in scope
+                            whose tag name matches the tag name of the token, then
+                            pop elements from this stack until an element with that
+                            tag name has been popped from the stack. */
+                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                                if ($this->stack[$n]->nodeName === $token['name']) {
+                                    $n = -1;
+                                }
+
+                                array_pop($this->stack);
+                            }
+                        }
+                        break;
+
+                    /* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",
+                    "h5", "h6" */
+                    case 'h1':
+                    case 'h2':
+                    case 'h3':
+                    case 'h4':
+                    case 'h5':
+                    case 'h6':
+                        $elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');
+
+                        /* If the stack of open elements has in scope an element whose
+                        tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
+                        generate implied end tags. */
+                        if ($this->elementInScope($elements)) {
+                            $this->generateImpliedEndTags();
+
+                            /* Now, if the current node is not an element with the same
+                            tag name as that of the token, then this is a parse error. */
+                            // w/e
+
+                            /* If the stack of open elements has in scope an element
+                            whose tag name is one of "h1", "h2", "h3", "h4", "h5", or
+                            "h6", then pop elements from the stack until an element
+                            with one of those tag names has been popped from the stack. */
+                            while ($this->elementInScope($elements)) {
+                                array_pop($this->stack);
+                            }
+                        }
+                        break;
+
+                    /* An end tag whose tag name is one of: "a", "b", "big", "em",
+                    "font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
+                    case 'a':
+                    case 'b':
+                    case 'big':
+                    case 'em':
+                    case 'font':
+                    case 'i':
+                    case 'nobr':
+                    case 's':
+                    case 'small':
+                    case 'strike':
+                    case 'strong':
+                    case 'tt':
+                    case 'u':
+                        /* 1. Let the formatting element be the last element in
+                        the list of active formatting elements that:
+                            * is between the end of the list and the last scope
+                            marker in the list, if any, or the start of the list
+                            otherwise, and
+                            * has the same tag name as the token.
+                        */
+                        while (true) {
+                            for ($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
+                                if ($this->a_formatting[$a] === self::MARKER) {
+                                    break;
+
+                                } elseif ($this->a_formatting[$a]->tagName === $token['name']) {
+                                    $formatting_element = $this->a_formatting[$a];
+                                    $in_stack = in_array($formatting_element, $this->stack, true);
+                                    $fe_af_pos = $a;
+                                    break;
+                                }
+                            }
+
+                            /* If there is no such node, or, if that node is
+                            also in the stack of open elements but the element
+                            is not in scope, then this is a parse error. Abort
+                            these steps. The token is ignored. */
+                            if (!isset($formatting_element) || ($in_stack &&
+                                    !$this->elementInScope($token['name']))
+                            ) {
+                                break;
+
+                                /* Otherwise, if there is such a node, but that node
+                                is not in the stack of open elements, then this is a
+                                parse error; remove the element from the list, and
+                                abort these steps. */
+                            } elseif (isset($formatting_element) && !$in_stack) {
+                                unset($this->a_formatting[$fe_af_pos]);
+                                $this->a_formatting = array_merge($this->a_formatting);
+                                break;
+                            }
+
+                            /* 2. Let the furthest block be the topmost node in the
+                            stack of open elements that is lower in the stack
+                            than the formatting element, and is not an element in
+                            the phrasing or formatting categories. There might
+                            not be one. */
+                            $fe_s_pos = array_search($formatting_element, $this->stack, true);
+                            $length = count($this->stack);
+
+                            for ($s = $fe_s_pos + 1; $s < $length; $s++) {
+                                $category = $this->getElementCategory($this->stack[$s]->nodeName);
+
+                                if ($category !== self::PHRASING && $category !== self::FORMATTING) {
+                                    $furthest_block = $this->stack[$s];
+                                }
+                            }
+
+                            /* 3. If there is no furthest block, then the UA must
+                            skip the subsequent steps and instead just pop all
+                            the nodes from the bottom of the stack of open
+                            elements, from the current node up to the formatting
+                            element, and remove the formatting element from the
+                            list of active formatting elements. */
+                            if (!isset($furthest_block)) {
+                                for ($n = $length - 1; $n >= $fe_s_pos; $n--) {
+                                    array_pop($this->stack);
+                                }
+
+                                unset($this->a_formatting[$fe_af_pos]);
+                                $this->a_formatting = array_merge($this->a_formatting);
+                                break;
+                            }
+
+                            /* 4. Let the common ancestor be the element
+                            immediately above the formatting element in the stack
+                            of open elements. */
+                            $common_ancestor = $this->stack[$fe_s_pos - 1];
+
+                            /* 5. If the furthest block has a parent node, then
+                            remove the furthest block from its parent node. */
+                            if ($furthest_block->parentNode !== null) {
+                                $furthest_block->parentNode->removeChild($furthest_block);
+                            }
+
+                            /* 6. Let a bookmark note the position of the
+                            formatting element in the list of active formatting
+                            elements relative to the elements on either side
+                            of it in the list. */
+                            $bookmark = $fe_af_pos;
+
+                            /* 7. Let node and last node  be the furthest block.
+                            Follow these steps: */
+                            $node = $furthest_block;
+                            $last_node = $furthest_block;
+
+                            while (true) {
+                                for ($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
+                                    /* 7.1 Let node be the element immediately
+                                    prior to node in the stack of open elements. */
+                                    $node = $this->stack[$n];
+
+                                    /* 7.2 If node is not in the list of active
+                                    formatting elements, then remove node from
+                                    the stack of open elements and then go back
+                                    to step 1. */
+                                    if (!in_array($node, $this->a_formatting, true)) {
+                                        unset($this->stack[$n]);
+                                        $this->stack = array_merge($this->stack);
+
+                                    } else {
+                                        break;
+                                    }
+                                }
+
+                                /* 7.3 Otherwise, if node is the formatting
+                                element, then go to the next step in the overall
+                                algorithm. */
+                                if ($node === $formatting_element) {
+                                    break;
+
+                                    /* 7.4 Otherwise, if last node is the furthest
+                                    block, then move the aforementioned bookmark to
+                                    be immediately after the node in the list of
+                                    active formatting elements. */
+                                } elseif ($last_node === $furthest_block) {
+                                    $bookmark = array_search($node, $this->a_formatting, true) + 1;
+                                }
+
+                                /* 7.5 If node has any children, perform a
+                                shallow clone of node, replace the entry for
+                                node in the list of active formatting elements
+                                with an entry for the clone, replace the entry
+                                for node in the stack of open elements with an
+                                entry for the clone, and let node be the clone. */
+                                if ($node->hasChildNodes()) {
+                                    $clone = $node->cloneNode();
+                                    $s_pos = array_search($node, $this->stack, true);
+                                    $a_pos = array_search($node, $this->a_formatting, true);
+
+                                    $this->stack[$s_pos] = $clone;
+                                    $this->a_formatting[$a_pos] = $clone;
+                                    $node = $clone;
+                                }
+
+                                /* 7.6 Insert last node into node, first removing
+                                it from its previous parent node if any. */
+                                if ($last_node->parentNode !== null) {
+                                    $last_node->parentNode->removeChild($last_node);
+                                }
+
+                                $node->appendChild($last_node);
+
+                                /* 7.7 Let last node be node. */
+                                $last_node = $node;
+                            }
+
+                            /* 8. Insert whatever last node ended up being in
+                            the previous step into the common ancestor node,
+                            first removing it from its previous parent node if
+                            any. */
+                            if ($last_node->parentNode !== null) {
+                                $last_node->parentNode->removeChild($last_node);
+                            }
+
+                            $common_ancestor->appendChild($last_node);
+
+                            /* 9. Perform a shallow clone of the formatting
+                            element. */
+                            $clone = $formatting_element->cloneNode();
+
+                            /* 10. Take all of the child nodes of the furthest
+                            block and append them to the clone created in the
+                            last step. */
+                            while ($furthest_block->hasChildNodes()) {
+                                $child = $furthest_block->firstChild;
+                                $furthest_block->removeChild($child);
+                                $clone->appendChild($child);
+                            }
+
+                            /* 11. Append that clone to the furthest block. */
+                            $furthest_block->appendChild($clone);
+
+                            /* 12. Remove the formatting element from the list
+                            of active formatting elements, and insert the clone
+                            into the list of active formatting elements at the
+                            position of the aforementioned bookmark. */
+                            $fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
+                            unset($this->a_formatting[$fe_af_pos]);
+                            $this->a_formatting = array_merge($this->a_formatting);
+
+                            $af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
+                            $af_part2 = array_slice($this->a_formatting, $bookmark, count($this->a_formatting));
+                            $this->a_formatting = array_merge($af_part1, array($clone), $af_part2);
+
+                            /* 13. Remove the formatting element from the stack
+                            of open elements, and insert the clone into the stack
+                            of open elements immediately after (i.e. in a more
+                            deeply nested position than) the position of the
+                            furthest block in that stack. */
+                            $fe_s_pos = array_search($formatting_element, $this->stack, true);
+                            $fb_s_pos = array_search($furthest_block, $this->stack, true);
+                            unset($this->stack[$fe_s_pos]);
+
+                            $s_part1 = array_slice($this->stack, 0, $fb_s_pos);
+                            $s_part2 = array_slice($this->stack, $fb_s_pos + 1, count($this->stack));
+                            $this->stack = array_merge($s_part1, array($clone), $s_part2);
+
+                            /* 14. Jump back to step 1 in this series of steps. */
+                            unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
+                        }
+                        break;
+
+                    /* An end tag token whose tag name is one of: "button",
+                    "marquee", "object" */
+                    case 'button':
+                    case 'marquee':
+                    case 'object':
+                        /* If the stack of open elements has an element in scope whose
+                        tag name matches the tag name of the token, then generate implied
+                        tags. */
+                        if ($this->elementInScope($token['name'])) {
+                            $this->generateImpliedEndTags();
+
+                            /* Now, if the current node is not an element with the same
+                            tag name as the token, then this is a parse error. */
+                            // k
+
+                            /* Now, if the stack of open elements has an element in scope
+                            whose tag name matches the tag name of the token, then pop
+                            elements from the stack until that element has been popped from
+                            the stack, and clear the list of active formatting elements up
+                            to the last marker. */
+                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                                if ($this->stack[$n]->nodeName === $token['name']) {
+                                    $n = -1;
+                                }
+
+                                array_pop($this->stack);
+                            }
+
+                            $marker = end(array_keys($this->a_formatting, self::MARKER, true));
+
+                            for ($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
+                                array_pop($this->a_formatting);
+                            }
+                        }
+                        break;
+
+                    /* Or an end tag whose tag name is one of: "area", "basefont",
+                    "bgsound", "br", "embed", "hr", "iframe", "image", "img",
+                    "input", "isindex", "noembed", "noframes", "param", "select",
+                    "spacer", "table", "textarea", "wbr" */
+                    case 'area':
+                    case 'basefont':
+                    case 'bgsound':
+                    case 'br':
+                    case 'embed':
+                    case 'hr':
+                    case 'iframe':
+                    case 'image':
+                    case 'img':
+                    case 'input':
+                    case 'isindex':
+                    case 'noembed':
+                    case 'noframes':
+                    case 'param':
+                    case 'select':
+                    case 'spacer':
+                    case 'table':
+                    case 'textarea':
+                    case 'wbr':
+                        // Parse error. Ignore the token.
+                        break;
+
+                    /* An end tag token not covered by the previous entries */
+                    default:
+                        for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                            /* Initialise node to be the current node (the bottommost
+                            node of the stack). */
+                            $node = end($this->stack);
+
+                            /* If node has the same tag name as the end tag token,
+                            then: */
+                            if ($token['name'] === $node->nodeName) {
+                                /* Generate implied end tags. */
+                                $this->generateImpliedEndTags();
+
+                                /* If the tag name of the end tag token does not
+                                match the tag name of the current node, this is a
+                                parse error. */
+                                // k
+
+                                /* Pop all the nodes from the current node up to
+                                node, including node, then stop this algorithm. */
+                                for ($x = count($this->stack) - $n; $x >= $n; $x--) {
+                                    array_pop($this->stack);
+                                }
+
+                            } else {
+                                $category = $this->getElementCategory($node);
+
+                                if ($category !== self::SPECIAL && $category !== self::SCOPING) {
+                                    /* Otherwise, if node is in neither the formatting
+                                    category nor the phrasing category, then this is a
+                                    parse error. Stop this algorithm. The end tag token
+                                    is ignored. */
+                                    return false;
+                                }
+                            }
+                        }
+                        break;
+                }
+                break;
+        }
+    }
+
+    private function inTable($token)
+    {
+        $clear = array('html', 'table');
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $text = $this->dom->createTextNode($token['data']);
+            end($this->stack)->appendChild($text);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            end($this->stack)->appendChild($comment);
+
+            /* A start tag whose tag name is "caption" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'caption'
+        ) {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert a marker at the end of the list of active
+            formatting elements. */
+            $this->a_formatting[] = self::MARKER;
+
+            /* Insert an HTML element for the token, then switch the
+            insertion mode to "in caption". */
+            $this->insertElement($token);
+            $this->mode = self::IN_CAPTION;
+
+            /* A start tag whose tag name is "colgroup" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'colgroup'
+        ) {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the
+            insertion mode to "in column group". */
+            $this->insertElement($token);
+            $this->mode = self::IN_CGROUP;
+
+            /* A start tag whose tag name is "col" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'col'
+        ) {
+            $this->inTable(
+                array(
+                    'name' => 'colgroup',
+                    'type' => HTML5::STARTTAG,
+                    'attr' => array()
+                )
+            );
+
+            $this->inColumnGroup($token);
+
+            /* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array('tbody', 'tfoot', 'thead')
+            )
+        ) {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the insertion
+            mode to "in table body". */
+            $this->insertElement($token);
+            $this->mode = self::IN_TBODY;
+
+            /* A start tag whose tag name is one of: "td", "th", "tr" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            in_array($token['name'], array('td', 'th', 'tr'))
+        ) {
+            /* Act as if a start tag token with the tag name "tbody" had been
+            seen, then reprocess the current token. */
+            $this->inTable(
+                array(
+                    'name' => 'tbody',
+                    'type' => HTML5::STARTTAG,
+                    'attr' => array()
+                )
+            );
+
+            return $this->inTableBody($token);
+
+            /* A start tag whose tag name is "table" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'table'
+        ) {
+            /* Parse error. Act as if an end tag token with the tag name "table"
+            had been seen, then, if that token wasn't ignored, reprocess the
+            current token. */
+            $this->inTable(
+                array(
+                    'name' => 'table',
+                    'type' => HTML5::ENDTAG
+                )
+            );
+
+            return $this->mainPhase($token);
+
+            /* An end tag whose tag name is "table" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            $token['name'] === 'table'
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (innerHTML case) */
+            if (!$this->elementInScope($token['name'], true)) {
+                return false;
+
+                /* Otherwise: */
+            } else {
+                /* Generate implied end tags. */
+                $this->generateImpliedEndTags();
+
+                /* Now, if the current node is not a table element, then this
+                is a parse error. */
+                // w/e
+
+                /* Pop elements from this stack until a table element has been
+                popped from the stack. */
+                while (true) {
+                    $current = end($this->stack)->nodeName;
+                    array_pop($this->stack);
+
+                    if ($current === 'table') {
+                        break;
+                    }
+                }
+
+                /* Reset the insertion mode appropriately. */
+                $this->resetInsertionMode();
+            }
+
+            /* An end tag whose tag name is one of: "body", "caption", "col",
+            "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array(
+                    'body',
+                    'caption',
+                    'col',
+                    'colgroup',
+                    'html',
+                    'tbody',
+                    'td',
+                    'tfoot',
+                    'th',
+                    'thead',
+                    'tr'
+                )
+            )
+        ) {
+            // Parse error. Ignore the token.
+
+            /* Anything else */
+        } else {
+            /* Parse error. Process the token as if the insertion mode was "in
+            body", with the following exception: */
+
+            /* If the current node is a table, tbody, tfoot, thead, or tr
+            element, then, whenever a node would be inserted into the current
+            node, it must instead be inserted into the foster parent element. */
+            if (in_array(
+                end($this->stack)->nodeName,
+                array('table', 'tbody', 'tfoot', 'thead', 'tr')
+            )
+            ) {
+                /* The foster parent element is the parent element of the last
+                table element in the stack of open elements, if there is a
+                table element and it has such a parent element. If there is no
+                table element in the stack of open elements (innerHTML case),
+                then the foster parent element is the first element in the
+                stack of open elements (the html  element). Otherwise, if there
+                is a table element in the stack of open elements, but the last
+                table element in the stack of open elements has no parent, or
+                its parent node is not an element, then the foster parent
+                element is the element before the last table element in the
+                stack of open elements. */
+                for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                    if ($this->stack[$n]->nodeName === 'table') {
+                        $table = $this->stack[$n];
+                        break;
+                    }
+                }
+
+                if (isset($table) && $table->parentNode !== null) {
+                    $this->foster_parent = $table->parentNode;
+
+                } elseif (!isset($table)) {
+                    $this->foster_parent = $this->stack[0];
+
+                } elseif (isset($table) && ($table->parentNode === null ||
+                        $table->parentNode->nodeType !== XML_ELEMENT_NODE)
+                ) {
+                    $this->foster_parent = $this->stack[$n - 1];
+                }
+            }
+
+            $this->inBody($token);
+        }
+    }
+
+    private function inCaption($token)
+    {
+        /* An end tag whose tag name is "caption" */
+        if ($token['type'] === HTML5::ENDTAG && $token['name'] === 'caption') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (innerHTML case) */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore
+
+                /* Otherwise: */
+            } else {
+                /* Generate implied end tags. */
+                $this->generateImpliedEndTags();
+
+                /* Now, if the current node is not a caption element, then this
+                is a parse error. */
+                // w/e
+
+                /* Pop elements from this stack until a caption element has
+                been popped from the stack. */
+                while (true) {
+                    $node = end($this->stack)->nodeName;
+                    array_pop($this->stack);
+
+                    if ($node === 'caption') {
+                        break;
+                    }
+                }
+
+                /* Clear the list of active formatting elements up to the last
+                marker. */
+                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
+
+                /* Switch the insertion mode to "in table". */
+                $this->mode = self::IN_TABLE;
+            }
+
+            /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+            "tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag
+            name is "table" */
+        } elseif (($token['type'] === HTML5::STARTTAG && in_array(
+                    $token['name'],
+                    array(
+                        'caption',
+                        'col',
+                        'colgroup',
+                        'tbody',
+                        'td',
+                        'tfoot',
+                        'th',
+                        'thead',
+                        'tr'
+                    )
+                )) || ($token['type'] === HTML5::ENDTAG &&
+                $token['name'] === 'table')
+        ) {
+            /* Parse error. Act as if an end tag with the tag name "caption"
+            had been seen, then, if that token wasn't ignored, reprocess the
+            current token. */
+            $this->inCaption(
+                array(
+                    'name' => 'caption',
+                    'type' => HTML5::ENDTAG
+                )
+            );
+
+            return $this->inTable($token);
+
+            /* An end tag whose tag name is one of: "body", "col", "colgroup",
+            "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array(
+                    'body',
+                    'col',
+                    'colgroup',
+                    'html',
+                    'tbody',
+                    'tfoot',
+                    'th',
+                    'thead',
+                    'tr'
+                )
+            )
+        ) {
+            // Parse error. Ignore the token.
+
+            /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in body". */
+            $this->inBody($token);
+        }
+    }
+
+    private function inColumnGroup($token)
+    {
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $text = $this->dom->createTextNode($token['data']);
+            end($this->stack)->appendChild($text);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            end($this->stack)->appendChild($comment);
+
+            /* A start tag whose tag name is "col" */
+        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'col') {
+            /* Insert a col element for the token. Immediately pop the current
+            node off the stack of open elements. */
+            $this->insertElement($token);
+            array_pop($this->stack);
+
+            /* An end tag whose tag name is "colgroup" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            $token['name'] === 'colgroup'
+        ) {
+            /* If the current node is the root html element, then this is a
+            parse error, ignore the token. (innerHTML case) */
+            if (end($this->stack)->nodeName === 'html') {
+                // Ignore
+
+                /* Otherwise, pop the current node (which will be a colgroup
+                element) from the stack of open elements. Switch the insertion
+                mode to "in table". */
+            } else {
+                array_pop($this->stack);
+                $this->mode = self::IN_TABLE;
+            }
+
+            /* An end tag whose tag name is "col" */
+        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'col') {
+            /* Parse error. Ignore the token. */
+
+            /* Anything else */
+        } else {
+            /* Act as if an end tag with the tag name "colgroup" had been seen,
+            and then, if that token wasn't ignored, reprocess the current token. */
+            $this->inColumnGroup(
+                array(
+                    'name' => 'colgroup',
+                    'type' => HTML5::ENDTAG
+                )
+            );
+
+            return $this->inTable($token);
+        }
+    }
+
+    private function inTableBody($token)
+    {
+        $clear = array('tbody', 'tfoot', 'thead', 'html');
+
+        /* A start tag whose tag name is "tr" */
+        if ($token['type'] === HTML5::STARTTAG && $token['name'] === 'tr') {
+            /* Clear the stack back to a table body context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert a tr element for the token, then switch the insertion
+            mode to "in row". */
+            $this->insertElement($token);
+            $this->mode = self::IN_ROW;
+
+            /* A start tag whose tag name is one of: "th", "td" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            ($token['name'] === 'th' || $token['name'] === 'td')
+        ) {
+            /* Parse error. Act as if a start tag with the tag name "tr" had
+            been seen, then reprocess the current token. */
+            $this->inTableBody(
+                array(
+                    'name' => 'tr',
+                    'type' => HTML5::STARTTAG,
+                    'attr' => array()
+                )
+            );
+
+            return $this->inRow($token);
+
+            /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            in_array($token['name'], array('tbody', 'tfoot', 'thead'))
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore
+
+                /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table body context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Pop the current node from the stack of open elements. Switch
+                the insertion mode to "in table". */
+                array_pop($this->stack);
+                $this->mode = self::IN_TABLE;
+            }
+
+            /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+            "tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
+        } elseif (($token['type'] === HTML5::STARTTAG && in_array(
+                    $token['name'],
+                    array('caption', 'col', 'colgroup', 'tbody', 'tfoor', 'thead')
+                )) ||
+            ($token['type'] === HTML5::STARTTAG && $token['name'] === 'table')
+        ) {
+            /* If the stack of open elements does not have a tbody, thead, or
+            tfoot element in table scope, this is a parse error. Ignore the
+            token. (innerHTML case) */
+            if (!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
+                // Ignore.
+
+                /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table body context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Act as if an end tag with the same tag name as the current
+                node ("tbody", "tfoot", or "thead") had been seen, then
+                reprocess the current token. */
+                $this->inTableBody(
+                    array(
+                        'name' => end($this->stack)->nodeName,
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+
+                return $this->mainPhase($token);
+            }
+
+            /* An end tag whose tag name is one of: "body", "caption", "col",
+            "colgroup", "html", "td", "th", "tr" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr')
+            )
+        ) {
+            /* Parse error. Ignore the token. */
+
+            /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in table". */
+            $this->inTable($token);
+        }
+    }
+
+    private function inRow($token)
+    {
+        $clear = array('tr', 'html');
+
+        /* A start tag whose tag name is one of: "th", "td" */
+        if ($token['type'] === HTML5::STARTTAG &&
+            ($token['name'] === 'th' || $token['name'] === 'td')
+        ) {
+            /* Clear the stack back to a table row context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the insertion
+            mode to "in cell". */
+            $this->insertElement($token);
+            $this->mode = self::IN_CELL;
+
+            /* Insert a marker at the end of the list of active formatting
+            elements. */
+            $this->a_formatting[] = self::MARKER;
+
+            /* An end tag whose tag name is "tr" */
+        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'tr') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (innerHTML case) */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore.
+
+                /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table row context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Pop the current node (which will be a tr element) from the
+                stack of open elements. Switch the insertion mode to "in table
+                body". */
+                array_pop($this->stack);
+                $this->mode = self::IN_TBODY;
+            }
+
+            /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+            "tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr')
+            )
+        ) {
+            /* Act as if an end tag with the tag name "tr" had been seen, then,
+            if that token wasn't ignored, reprocess the current token. */
+            $this->inRow(
+                array(
+                    'name' => 'tr',
+                    'type' => HTML5::ENDTAG
+                )
+            );
+
+            return $this->inCell($token);
+
+            /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            in_array($token['name'], array('tbody', 'tfoot', 'thead'))
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore.
+
+                /* Otherwise: */
+            } else {
+                /* Otherwise, act as if an end tag with the tag name "tr" had
+                been seen, then reprocess the current token. */
+                $this->inRow(
+                    array(
+                        'name' => 'tr',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+
+                return $this->inCell($token);
+            }
+
+            /* An end tag whose tag name is one of: "body", "caption", "col",
+            "colgroup", "html", "td", "th" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr')
+            )
+        ) {
+            /* Parse error. Ignore the token. */
+
+            /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in table". */
+            $this->inTable($token);
+        }
+    }
+
+    private function inCell($token)
+    {
+        /* An end tag whose tag name is one of: "td", "th" */
+        if ($token['type'] === HTML5::ENDTAG &&
+            ($token['name'] === 'td' || $token['name'] === 'th')
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as that of the token, then this is a
+            parse error and the token must be ignored. */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore.
+
+                /* Otherwise: */
+            } else {
+                /* Generate implied end tags, except for elements with the same
+                tag name as the token. */
+                $this->generateImpliedEndTags(array($token['name']));
+
+                /* Now, if the current node is not an element with the same tag
+                name as the token, then this is a parse error. */
+                // k
+
+                /* Pop elements from this stack until an element with the same
+                tag name as the token has been popped from the stack. */
+                while (true) {
+                    $node = end($this->stack)->nodeName;
+                    array_pop($this->stack);
+
+                    if ($node === $token['name']) {
+                        break;
+                    }
+                }
+
+                /* Clear the list of active formatting elements up to the last
+                marker. */
+                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
+
+                /* Switch the insertion mode to "in row". (The current node
+                will be a tr element at this point.) */
+                $this->mode = self::IN_ROW;
+            }
+
+            /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+            "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array(
+                    'caption',
+                    'col',
+                    'colgroup',
+                    'tbody',
+                    'td',
+                    'tfoot',
+                    'th',
+                    'thead',
+                    'tr'
+                )
+            )
+        ) {
+            /* If the stack of open elements does not have a td or th element
+            in table scope, then this is a parse error; ignore the token.
+            (innerHTML case) */
+            if (!$this->elementInScope(array('td', 'th'), true)) {
+                // Ignore.
+
+                /* Otherwise, close the cell (see below) and reprocess the current
+                token. */
+            } else {
+                $this->closeCell();
+                return $this->inRow($token);
+            }
+
+            /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+            "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
+                $token['name'],
+                array(
+                    'caption',
+                    'col',
+                    'colgroup',
+                    'tbody',
+                    'td',
+                    'tfoot',
+                    'th',
+                    'thead',
+                    'tr'
+                )
+            )
+        ) {
+            /* If the stack of open elements does not have a td or th element
+            in table scope, then this is a parse error; ignore the token.
+            (innerHTML case) */
+            if (!$this->elementInScope(array('td', 'th'), true)) {
+                // Ignore.
+
+                /* Otherwise, close the cell (see below) and reprocess the current
+                token. */
+            } else {
+                $this->closeCell();
+                return $this->inRow($token);
+            }
+
+            /* An end tag whose tag name is one of: "body", "caption", "col",
+            "colgroup", "html" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array('body', 'caption', 'col', 'colgroup', 'html')
+            )
+        ) {
+            /* Parse error. Ignore the token. */
+
+            /* An end tag whose tag name is one of: "table", "tbody", "tfoot",
+            "thead", "tr" */
+        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
+                $token['name'],
+                array('table', 'tbody', 'tfoot', 'thead', 'tr')
+            )
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as that of the token (which can only
+            happen for "tbody", "tfoot" and "thead", or, in the innerHTML case),
+            then this is a parse error and the token must be ignored. */
+            if (!$this->elementInScope($token['name'], true)) {
+                // Ignore.
+
+                /* Otherwise, close the cell (see below) and reprocess the current
+                token. */
+            } else {
+                $this->closeCell();
+                return $this->inRow($token);
+            }
+
+            /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in body". */
+            $this->inBody($token);
+        }
+    }
+
+    private function inSelect($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token */
+        if ($token['type'] === HTML5::CHARACTR) {
+            /* Append the token's character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+            /* A start tag token whose tag name is "option" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'option'
+        ) {
+            /* If the current node is an option element, act as if an end tag
+            with the tag name "option" had been seen. */
+            if (end($this->stack)->nodeName === 'option') {
+                $this->inSelect(
+                    array(
+                        'name' => 'option',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+            }
+
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+            /* A start tag token whose tag name is "optgroup" */
+        } elseif ($token['type'] === HTML5::STARTTAG &&
+            $token['name'] === 'optgroup'
+        ) {
+            /* If the current node is an option element, act as if an end tag
+            with the tag name "option" had been seen. */
+            if (end($this->stack)->nodeName === 'option') {
+                $this->inSelect(
+                    array(
+                        'name' => 'option',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+            }
+
+            /* If the current node is an optgroup element, act as if an end tag
+            with the tag name "optgroup" had been seen. */
+            if (end($this->stack)->nodeName === 'optgroup') {
+                $this->inSelect(
+                    array(
+                        'name' => 'optgroup',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+            }
+
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+            /* An end tag token whose tag name is "optgroup" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            $token['name'] === 'optgroup'
+        ) {
+            /* First, if the current node is an option element, and the node
+            immediately before it in the stack of open elements is an optgroup
+            element, then act as if an end tag with the tag name "option" had
+            been seen. */
+            $elements_in_stack = count($this->stack);
+
+            if ($this->stack[$elements_in_stack - 1]->nodeName === 'option' &&
+                $this->stack[$elements_in_stack - 2]->nodeName === 'optgroup'
+            ) {
+                $this->inSelect(
+                    array(
+                        'name' => 'option',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+            }
+
+            /* If the current node is an optgroup element, then pop that node
+            from the stack of open elements. Otherwise, this is a parse error,
+            ignore the token. */
+            if ($this->stack[$elements_in_stack - 1] === 'optgroup') {
+                array_pop($this->stack);
+            }
+
+            /* An end tag token whose tag name is "option" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            $token['name'] === 'option'
+        ) {
+            /* If the current node is an option element, then pop that node
+            from the stack of open elements. Otherwise, this is a parse error,
+            ignore the token. */
+            if (end($this->stack)->nodeName === 'option') {
+                array_pop($this->stack);
+            }
+
+            /* An end tag whose tag name is "select" */
+        } elseif ($token['type'] === HTML5::ENDTAG &&
+            $token['name'] === 'select'
+        ) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (innerHTML case) */
+            if (!$this->elementInScope($token['name'], true)) {
+                // w/e
+
+                /* Otherwise: */
+            } else {
+                /* Pop elements from the stack of open elements until a select
+                element has been popped from the stack. */
+                while (true) {
+                    $current = end($this->stack)->nodeName;
+                    array_pop($this->stack);
+
+                    if ($current === 'select') {
+                        break;
+                    }
+                }
+
+                /* Reset the insertion mode appropriately. */
+                $this->resetInsertionMode();
+            }
+
+            /* A start tag whose tag name is "select" */
+        } elseif ($token['name'] === 'select' &&
+            $token['type'] === HTML5::STARTTAG
+        ) {
+            /* Parse error. Act as if the token had been an end tag with the
+            tag name "select" instead. */
+            $this->inSelect(
+                array(
+                    'name' => 'select',
+                    'type' => HTML5::ENDTAG
+                )
+            );
+
+            /* An end tag whose tag name is one of: "caption", "table", "tbody",
+            "tfoot", "thead", "tr", "td", "th" */
+        } elseif (in_array(
+                $token['name'],
+                array(
+                    'caption',
+                    'table',
+                    'tbody',
+                    'tfoot',
+                    'thead',
+                    'tr',
+                    'td',
+                    'th'
+                )
+            ) && $token['type'] === HTML5::ENDTAG
+        ) {
+            /* Parse error. */
+            // w/e
+
+            /* If the stack of open elements has an element in table scope with
+            the same tag name as that of the token, then act as if an end tag
+            with the tag name "select" had been seen, and reprocess the token.
+            Otherwise, ignore the token. */
+            if ($this->elementInScope($token['name'], true)) {
+                $this->inSelect(
+                    array(
+                        'name' => 'select',
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+
+                $this->mainPhase($token);
+            }
+
+            /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+        }
+    }
+
+    private function afterBody($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Process the token as it would be processed if the insertion mode
+            was "in body". */
+            $this->inBody($token);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the first element in the stack of open
+            elements (the html element), with the data attribute set to the
+            data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->stack[0]->appendChild($comment);
+
+            /* An end tag with the tag name "html" */
+        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') {
+            /* If the parser was originally created in order to handle the
+            setting of an element's innerHTML attribute, this is a parse error;
+            ignore the token. (The element will be an html element in this
+            case.) (innerHTML case) */
+
+            /* Otherwise, switch to the trailing end phase. */
+            $this->phase = self::END_PHASE;
+
+            /* Anything else */
+        } else {
+            /* Parse error. Set the insertion mode to "in body" and reprocess
+            the token. */
+            $this->mode = self::IN_BODY;
+            return $this->inBody($token);
+        }
+    }
+
+    private function inFrameset($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+            /* A start tag with the tag name "frameset" */
+        } elseif ($token['name'] === 'frameset' &&
+            $token['type'] === HTML5::STARTTAG
+        ) {
+            $this->insertElement($token);
+
+            /* An end tag with the tag name "frameset" */
+        } elseif ($token['name'] === 'frameset' &&
+            $token['type'] === HTML5::ENDTAG
+        ) {
+            /* If the current node is the root html element, then this is a
+            parse error; ignore the token. (innerHTML case) */
+            if (end($this->stack)->nodeName === 'html') {
+                // Ignore
+
+            } else {
+                /* Otherwise, pop the current node from the stack of open
+                elements. */
+                array_pop($this->stack);
+
+                /* If the parser was not originally created in order to handle
+                the setting of an element's innerHTML attribute (innerHTML case),
+                and the current node is no longer a frameset element, then change
+                the insertion mode to "after frameset". */
+                $this->mode = self::AFTR_FRAME;
+            }
+
+            /* A start tag with the tag name "frame" */
+        } elseif ($token['name'] === 'frame' &&
+            $token['type'] === HTML5::STARTTAG
+        ) {
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+            /* Immediately pop the current node off the stack of open elements. */
+            array_pop($this->stack);
+
+            /* A start tag with the tag name "noframes" */
+        } elseif ($token['name'] === 'noframes' &&
+            $token['type'] === HTML5::STARTTAG
+        ) {
+            /* Process the token as if the insertion mode had been "in body". */
+            $this->inBody($token);
+
+            /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+        }
+    }
+
+    private function afterFrameset($token)
+    {
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
+        if ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+            /* An end tag with the tag name "html" */
+        } elseif ($token['name'] === 'html' &&
+            $token['type'] === HTML5::ENDTAG
+        ) {
+            /* Switch to the trailing end phase. */
+            $this->phase = self::END_PHASE;
+
+            /* A start tag with the tag name "noframes" */
+        } elseif ($token['name'] === 'noframes' &&
+            $token['type'] === HTML5::STARTTAG
+        ) {
+            /* Process the token as if the insertion mode had been "in body". */
+            $this->inBody($token);
+
+            /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+        }
+    }
+
+    private function trailingEndPhase($token)
+    {
+        /* After the main phase, as each token is emitted from the tokenisation
+        stage, it must be processed as described in this section. */
+
+        /* A DOCTYPE token */
+        if ($token['type'] === HTML5::DOCTYPE) {
+            // Parse error. Ignore the token.
+
+            /* A comment token */
+        } elseif ($token['type'] === HTML5::COMMENT) {
+            /* Append a Comment node to the Document object with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->dom->appendChild($comment);
+
+            /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE */
+        } elseif ($token['type'] === HTML5::CHARACTR &&
+            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
+        ) {
+            /* Process the token as it would be processed in the main phase. */
+            $this->mainPhase($token);
+
+            /* A character token that is not one of U+0009 CHARACTER TABULATION,
+            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+            or U+0020 SPACE. Or a start tag token. Or an end tag token. */
+        } elseif (($token['type'] === HTML5::CHARACTR &&
+                preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
+            $token['type'] === HTML5::STARTTAG || $token['type'] === HTML5::ENDTAG
+        ) {
+            /* Parse error. Switch back to the main phase and reprocess the
+            token. */
+            $this->phase = self::MAIN_PHASE;
+            return $this->mainPhase($token);
+
+            /* An end-of-file token */
+        } elseif ($token['type'] === HTML5::EOF) {
+            /* OMG DONE!! */
+        }
+    }
+
+    private function insertElement($token, $append = true, $check = false)
+    {
+        // Proprietary workaround for libxml2's limitations with tag names
+        if ($check) {
+            // Slightly modified HTML5 tag-name modification,
+            // removing anything that's not an ASCII letter, digit, or hyphen
+            $token['name'] = preg_replace('/[^a-z0-9-]/i', '', $token['name']);
+            // Remove leading hyphens and numbers
+            $token['name'] = ltrim($token['name'], '-0..9');
+            // In theory, this should ever be needed, but just in case
+            if ($token['name'] === '') {
+                $token['name'] = 'span';
+            } // arbitrary generic choice
+        }
+
+        $el = $this->dom->createElement($token['name']);
+
+        foreach ($token['attr'] as $attr) {
+            if (!$el->hasAttribute($attr['name'])) {
+                $el->setAttribute($attr['name'], $attr['value']);
+            }
+        }
+
+        $this->appendToRealParent($el);
+        $this->stack[] = $el;
+
+        return $el;
+    }
+
+    private function insertText($data)
+    {
+        $text = $this->dom->createTextNode($data);
+        $this->appendToRealParent($text);
+    }
+
+    private function insertComment($data)
+    {
+        $comment = $this->dom->createComment($data);
+        $this->appendToRealParent($comment);
+    }
+
+    private function appendToRealParent($node)
+    {
+        if ($this->foster_parent === null) {
+            end($this->stack)->appendChild($node);
+
+        } elseif ($this->foster_parent !== null) {
+            /* If the foster parent element is the parent element of the
+            last table element in the stack of open elements, then the new
+            node must be inserted immediately before the last table element
+            in the stack of open elements in the foster parent element;
+            otherwise, the new node must be appended to the foster parent
+            element. */
+            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
+                if ($this->stack[$n]->nodeName === 'table' &&
+                    $this->stack[$n]->parentNode !== null
+                ) {
+                    $table = $this->stack[$n];
+                    break;
+                }
+            }
+
+            if (isset($table) && $this->foster_parent->isSameNode($table->parentNode)) {
+                $this->foster_parent->insertBefore($node, $table);
+            } else {
+                $this->foster_parent->appendChild($node);
+            }
+
+            $this->foster_parent = null;
+        }
+    }
+
+    private function elementInScope($el, $table = false)
+    {
+        if (is_array($el)) {
+            foreach ($el as $element) {
+                if ($this->elementInScope($element, $table)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        $leng = count($this->stack);
+
+        for ($n = 0; $n < $leng; $n++) {
+            /* 1. Initialise node to be the current node (the bottommost node of
+            the stack). */
+            $node = $this->stack[$leng - 1 - $n];
+
+            if ($node->tagName === $el) {
+                /* 2. If node is the target node, terminate in a match state. */
+                return true;
+
+            } elseif ($node->tagName === 'table') {
+                /* 3. Otherwise, if node is a table element, terminate in a failure
+                state. */
+                return false;
+
+            } elseif ($table === true && in_array(
+                    $node->tagName,
+                    array(
+                        'caption',
+                        'td',
+                        'th',
+                        'button',
+                        'marquee',
+                        'object'
+                    )
+                )
+            ) {
+                /* 4. Otherwise, if the algorithm is the "has an element in scope"
+                variant (rather than the "has an element in table scope" variant),
+                and node is one of the following, terminate in a failure state. */
+                return false;
+
+            } elseif ($node === $node->ownerDocument->documentElement) {
+                /* 5. Otherwise, if node is an html element (root element), terminate
+                in a failure state. (This can only happen if the node is the topmost
+                node of the    stack of open elements, and prevents the next step from
+                being invoked if there are no more elements in the stack.) */
+                return false;
+            }
+
+            /* Otherwise, set node to the previous entry in the stack of open
+            elements and return to step 2. (This will never fail, since the loop
+            will always terminate in the previous step if the top of the stack
+            is reached.) */
+        }
+    }
+
+    private function reconstructActiveFormattingElements()
+    {
+        /* 1. If there are no entries in the list of active formatting elements,
+        then there is nothing to reconstruct; stop this algorithm. */
+        $formatting_elements = count($this->a_formatting);
+
+        if ($formatting_elements === 0) {
+            return false;
+        }
+
+        /* 3. Let entry be the last (most recently added) element in the list
+        of active formatting elements. */
+        $entry = end($this->a_formatting);
+
+        /* 2. If the last (most recently added) entry in the list of active
+        formatting elements is a marker, or if it is an element that is in the
+        stack of open elements, then there is nothing to reconstruct; stop this
+        algorithm. */
+        if ($entry === self::MARKER || in_array($entry, $this->stack, true)) {
+            return false;
+        }
+
+        for ($a = $formatting_elements - 1; $a >= 0; true) {
+            /* 4. If there are no entries before entry in the list of active
+            formatting elements, then jump to step 8. */
+            if ($a === 0) {
+                $step_seven = false;
+                break;
+            }
+
+            /* 5. Let entry be the entry one earlier than entry in the list of
+            active formatting elements. */
+            $a--;
+            $entry = $this->a_formatting[$a];
+
+            /* 6. If entry is neither a marker nor an element that is also in
+            thetack of open elements, go to step 4. */
+            if ($entry === self::MARKER || in_array($entry, $this->stack, true)) {
+                break;
+            }
+        }
+
+        while (true) {
+            /* 7. Let entry be the element one later than entry in the list of
+            active formatting elements. */
+            if (isset($step_seven) && $step_seven === true) {
+                $a++;
+                $entry = $this->a_formatting[$a];
+            }
+
+            /* 8. Perform a shallow clone of the element entry to obtain clone. */
+            $clone = $entry->cloneNode();
+
+            /* 9. Append clone to the current node and push it onto the stack
+            of open elements  so that it is the new current node. */
+            end($this->stack)->appendChild($clone);
+            $this->stack[] = $clone;
+
+            /* 10. Replace the entry for entry in the list with an entry for
+            clone. */
+            $this->a_formatting[$a] = $clone;
+
+            /* 11. If the entry for clone in the list of active formatting
+            elements is not the last entry in the list, return to step 7. */
+            if (end($this->a_formatting) !== $clone) {
+                $step_seven = true;
+            } else {
+                break;
+            }
+        }
+    }
+
+    private function clearTheActiveFormattingElementsUpToTheLastMarker()
+    {
+        /* When the steps below require the UA to clear the list of active
+        formatting elements up to the last marker, the UA must perform the
+        following steps: */
+
+        while (true) {
+            /* 1. Let entry be the last (most recently added) entry in the list
+            of active formatting elements. */
+            $entry = end($this->a_formatting);
+
+            /* 2. Remove entry from the list of active formatting elements. */
+            array_pop($this->a_formatting);
+
+            /* 3. If entry was a marker, then stop the algorithm at this point.
+            The list has been cleared up to the last marker. */
+            if ($entry === self::MARKER) {
+                break;
+            }
+        }
+    }
+
+    private function generateImpliedEndTags($exclude = array())
+    {
+        /* When the steps below require the UA to generate implied end tags,
+        then, if the current node is a dd element, a dt element, an li element,
+        a p element, a td element, a th  element, or a tr element, the UA must
+        act as if an end tag with the respective tag name had been seen and
+        then generate implied end tags again. */
+        $node = end($this->stack);
+        $elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);
+
+        while (in_array(end($this->stack)->nodeName, $elements)) {
+            array_pop($this->stack);
+        }
+    }
+
+    private function getElementCategory($node)
+    {
+        $name = $node->tagName;
+        if (in_array($name, $this->special)) {
+            return self::SPECIAL;
+        } elseif (in_array($name, $this->scoping)) {
+            return self::SCOPING;
+        } elseif (in_array($name, $this->formatting)) {
+            return self::FORMATTING;
+        } else {
+            return self::PHRASING;
+        }
+    }
+
+    private function clearStackToTableContext($elements)
+    {
+        /* When the steps above require the UA to clear the stack back to a
+        table context, it means that the UA must, while the current node is not
+        a table element or an html element, pop elements from the stack of open
+        elements. If this causes any elements to be popped from the stack, then
+        this is a parse error. */
+        while (true) {
+            $node = end($this->stack)->nodeName;
+
+            if (in_array($node, $elements)) {
+                break;
+            } else {
+                array_pop($this->stack);
+            }
+        }
+    }
+
+    private function resetInsertionMode()
+    {
+        /* 1. Let last be false. */
+        $last = false;
+        $leng = count($this->stack);
+
+        for ($n = $leng - 1; $n >= 0; $n--) {
+            /* 2. Let node be the last node in the stack of open elements. */
+            $node = $this->stack[$n];
+
+            /* 3. If node is the first node in the stack of open elements, then
+            set last to true. If the element whose innerHTML  attribute is being
+            set is neither a td  element nor a th element, then set node to the
+            element whose innerHTML  attribute is being set. (innerHTML  case) */
+            if ($this->stack[0]->isSameNode($node)) {
+                $last = true;
+            }
+
+            /* 4. If node is a select element, then switch the insertion mode to
+            "in select" and abort these steps. (innerHTML case) */
+            if ($node->nodeName === 'select') {
+                $this->mode = self::IN_SELECT;
+                break;
+
+                /* 5. If node is a td or th element, then switch the insertion mode
+                to "in cell" and abort these steps. */
+            } elseif ($node->nodeName === 'td' || $node->nodeName === 'th') {
+                $this->mode = self::IN_CELL;
+                break;
+
+                /* 6. If node is a tr element, then switch the insertion mode to
+                "in    row" and abort these steps. */
+            } elseif ($node->nodeName === 'tr') {
+                $this->mode = self::IN_ROW;
+                break;
+
+                /* 7. If node is a tbody, thead, or tfoot element, then switch the
+                insertion mode to "in table body" and abort these steps. */
+            } elseif (in_array($node->nodeName, array('tbody', 'thead', 'tfoot'))) {
+                $this->mode = self::IN_TBODY;
+                break;
+
+                /* 8. If node is a caption element, then switch the insertion mode
+                to "in caption" and abort these steps. */
+            } elseif ($node->nodeName === 'caption') {
+                $this->mode = self::IN_CAPTION;
+                break;
+
+                /* 9. If node is a colgroup element, then switch the insertion mode
+                to "in column group" and abort these steps. (innerHTML case) */
+            } elseif ($node->nodeName === 'colgroup') {
+                $this->mode = self::IN_CGROUP;
+                break;
+
+                /* 10. If node is a table element, then switch the insertion mode
+                to "in table" and abort these steps. */
+            } elseif ($node->nodeName === 'table') {
+                $this->mode = self::IN_TABLE;
+                break;
+
+                /* 11. If node is a head element, then switch the insertion mode
+                to "in body" ("in body"! not "in head"!) and abort these steps.
+                (innerHTML case) */
+            } elseif ($node->nodeName === 'head') {
+                $this->mode = self::IN_BODY;
+                break;
+
+                /* 12. If node is a body element, then switch the insertion mode to
+                "in body" and abort these steps. */
+            } elseif ($node->nodeName === 'body') {
+                $this->mode = self::IN_BODY;
+                break;
+
+                /* 13. If node is a frameset element, then switch the insertion
+                mode to "in frameset" and abort these steps. (innerHTML case) */
+            } elseif ($node->nodeName === 'frameset') {
+                $this->mode = self::IN_FRAME;
+                break;
+
+                /* 14. If node is an html element, then: if the head element
+                pointer is null, switch the insertion mode to "before head",
+                otherwise, switch the insertion mode to "after head". In either
+                case, abort these steps. (innerHTML case) */
+            } elseif ($node->nodeName === 'html') {
+                $this->mode = ($this->head_pointer === null)
+                    ? self::BEFOR_HEAD
+                    : self::AFTER_HEAD;
+
+                break;
+
+                /* 15. If last is true, then set the insertion mode to "in body"
+                and    abort these steps. (innerHTML case) */
+            } elseif ($last) {
+                $this->mode = self::IN_BODY;
+                break;
+            }
+        }
+    }
+
+    private function closeCell()
+    {
+        /* If the stack of open elements has a td or th element in table scope,
+        then act as if an end tag token with that tag name had been seen. */
+        foreach (array('td', 'th') as $cell) {
+            if ($this->elementInScope($cell, true)) {
+                $this->inCell(
+                    array(
+                        'name' => $cell,
+                        'type' => HTML5::ENDTAG
+                    )
+                );
+
+                break;
+            }
+        }
+    }
+
+    public function save()
+    {
+        return $this->dom;
+    }
+}
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Node.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node.php
new file mode 100644
index 0000000000..3995fec9fe
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node.php
@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Abstract base node class that all others inherit from.
+ *
+ * Why do we not use the DOM extension?  (1) It is not always available,
+ * (2) it has funny constraints on the data it can represent,
+ * whereas we want a maximally flexible representation, and (3) its
+ * interface is a bit cumbersome.
+ */
+abstract class HTMLPurifier_Node
+{
+    /**
+     * Line number of the start token in the source document
+     * @type int
+     */
+    public $line;
+
+    /**
+     * Column number of the start token in the source document. Null if unknown.
+     * @type int
+     */
+    public $col;
+
+    /**
+     * Lookup array of processing that this token is exempt from.
+     * Currently, valid values are "ValidateAttributes".
+     * @type array
+     */
+    public $armor = array();
+
+    /**
+     * When true, this node should be ignored as non-existent.
+     *
+     * Who is responsible for ignoring dead nodes?  FixNesting is
+     * responsible for removing them before passing on to child
+     * validators.
+     */
+    public $dead = false;
+
+    /**
+     * Returns a pair of start and end tokens, where the end token
+     * is null if it is not necessary. Does not include children.
+     * @type array
+     */
+    abstract public function toTokenPair();
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Comment.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Comment.php
new file mode 100644
index 0000000000..38ba193942
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Comment.php
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * Concrete comment node class.
+ */
+class HTMLPurifier_Node_Comment extends HTMLPurifier_Node
+{
+    /**
+     * Character data within comment.
+     * @type string
+     */
+    public $data;
+
+    /**
+     * @type bool
+     */
+    public $is_whitespace = true;
+
+    /**
+     * Transparent constructor.
+     *
+     * @param string $data String comment data.
+     * @param int $line
+     * @param int $col
+     */
+    public function __construct($data, $line = null, $col = null)
+    {
+        $this->data = $data;
+        $this->line = $line;
+        $this->col = $col;
+    }
+
+    public function toTokenPair() {
+        return array(new HTMLPurifier_Token_Comment($this->data, $this->line, $this->col), null);
+    }
+}
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Element.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Element.php
new file mode 100644
index 0000000000..6cbf56dada
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Element.php
@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * Concrete element node class.
+ */
+class HTMLPurifier_Node_Element extends HTMLPurifier_Node
+{
+    /**
+     * The lower-case name of the tag, like 'a', 'b' or 'blockquote'.
+     *
+     * @note Strictly speaking, XML tags are case sensitive, so we shouldn't
+     * be lower-casing them, but these tokens cater to HTML tags, which are
+     * insensitive.
+     * @type string
+     */
+    public $name;
+
+    /**
+     * Associative array of the node's attributes.
+     * @type array
+     */
+    public $attr = array();
+
+    /**
+     * List of child elements.
+     * @type array
+     */
+    public $children = array();
+
+    /**
+     * Does this use the <a></a> form or the </a> form, i.e.
+     * is it a pair of start/end tokens or an empty token.
+     * @bool
+     */
+    public $empty = false;
+
+    public $endCol = null, $endLine = null, $endArmor = array();
+
+    public function __construct($name, $attr = array(), $line = null, $col = null, $armor = array()) {
+        $this->name = $name;
+        $this->attr = $attr;
+        $this->line = $line;
+        $this->col = $col;
+        $this->armor = $armor;
+    }
+
+    public function toTokenPair() {
+        // XXX inefficiency here, normalization is not necessary
+        if ($this->empty) {
+            return array(new HTMLPurifier_Token_Empty($this->name, $this->attr, $this->line, $this->col, $this->armor), null);
+        } else {
+            $start = new HTMLPurifier_Token_Start($this->name, $this->attr, $this->line, $this->col, $this->armor);
+            $end = new HTMLPurifier_Token_End($this->name, array(), $this->endLine, $this->endCol, $this->endArmor);
+            //$end->start = $start;
+            return array($start, $end);
+        }
+    }
+}
+
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Text.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Text.php
new file mode 100644
index 0000000000..aec9166473
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Node/Text.php
@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * Concrete text token class.
+ *
+ * Text tokens comprise of regular parsed character data (PCDATA) and raw
+ * character data (from the CDATA sections). Internally, their
+ * data is parsed with all entities expanded. Surprisingly, the text token
+ * does have a "tag name" called #PCDATA, which is how the DTD represents it
+ * in permissible child nodes.
+ */
+class HTMLPurifier_Node_Text extends HTMLPurifier_Node
+{
+
+    /**
+     * PCDATA tag name compatible with DTD, see
+     * HTMLPurifier_ChildDef_Custom for details.
+     * @type string
+     */
+    public $name = '#PCDATA';
+
+    /**
+     * @type string
+     */
+    public $data;
+    /**< Parsed character data of text. */
+
+    /**
+     * @type bool
+     */
+    public $is_whitespace;
+
+    /**< Bool indicating if node is whitespace. */
+
+    /**
+     * Constructor, accepts data and determines if it is whitespace.
+     * @param string $data String parsed character data.
+     * @param int $line
+     * @param int $col
+     */
+    public function __construct($data, $is_whitespace, $line = null, $col = null)
+    {
+        $this->data = $data;
+        $this->is_whitespace = $is_whitespace;
+        $this->line = $line;
+        $this->col = $col;
+    }
+
+    public function toTokenPair() {
+        return array(new HTMLPurifier_Token_Text($this->data, $this->line, $this->col), null);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/PercentEncoder.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/PercentEncoder.php
similarity index 78%
rename from library/HTMLPurifier/PercentEncoder.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/PercentEncoder.php
index a43c44f4c5..18c8bbb00a 100644
--- a/library/HTMLPurifier/PercentEncoder.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/PercentEncoder.php
@@ -13,17 +13,26 @@ class HTMLPurifier_PercentEncoder
 
     /**
      * Reserved characters to preserve when using encode().
+     * @type array
      */
     protected $preserve = array();
 
     /**
      * String of characters that should be preserved while using encode().
+     * @param bool $preserve
      */
-    public function __construct($preserve = false) {
+    public function __construct($preserve = false)
+    {
         // unreserved letters, ought to const-ify
-        for ($i = 48; $i <= 57;  $i++) $this->preserve[$i] = true; // digits
-        for ($i = 65; $i <= 90;  $i++) $this->preserve[$i] = true; // upper-case
-        for ($i = 97; $i <= 122; $i++) $this->preserve[$i] = true; // lower-case
+        for ($i = 48; $i <= 57; $i++) { // digits
+            $this->preserve[$i] = true;
+        }
+        for ($i = 65; $i <= 90; $i++) { // upper-case
+            $this->preserve[$i] = true;
+        }
+        for ($i = 97; $i <= 122; $i++) { // lower-case
+            $this->preserve[$i] = true;
+        }
         $this->preserve[45] = true; // Dash         -
         $this->preserve[46] = true; // Period       .
         $this->preserve[95] = true; // Underscore   _
@@ -44,13 +53,14 @@ class HTMLPurifier_PercentEncoder
      *      Assumes that the string has already been normalized, making any
      *      and all percent escape sequences valid. Percents will not be
      *      re-escaped, regardless of their status in $preserve
-     * @param $string String to be encoded
-     * @return Encoded string.
+     * @param string $string String to be encoded
+     * @return string Encoded string.
      */
-    public function encode($string) {
+    public function encode($string)
+    {
         $ret = '';
         for ($i = 0, $c = strlen($string); $i < $c; $i++) {
-            if ($string[$i] !== '%' && !isset($this->preserve[$int = ord($string[$i])]) ) {
+            if ($string[$i] !== '%' && !isset($this->preserve[$int = ord($string[$i])])) {
                 $ret .= '%' . sprintf('%02X', $int);
             } else {
                 $ret .= $string[$i];
@@ -64,10 +74,14 @@ class HTMLPurifier_PercentEncoder
      * @warning This function is affected by $preserve, even though the
      *          usual desired behavior is for this not to preserve those
      *          characters. Be careful when reusing instances of PercentEncoder!
-     * @param $string String to normalize
+     * @param string $string String to normalize
+     * @return string
      */
-    public function normalize($string) {
-        if ($string == '') return '';
+    public function normalize($string)
+    {
+        if ($string == '') {
+            return '';
+        }
         $parts = explode('%', $string);
         $ret = array_shift($parts);
         foreach ($parts as $part) {
@@ -92,7 +106,6 @@ class HTMLPurifier_PercentEncoder
         }
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Printer.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer.php
similarity index 54%
rename from library/HTMLPurifier/Printer.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer.php
index e7eb82e83e..549e4cea1e 100644
--- a/library/HTMLPurifier/Printer.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer.php
@@ -7,25 +7,30 @@ class HTMLPurifier_Printer
 {
 
     /**
-     * Instance of HTMLPurifier_Generator for HTML generation convenience funcs
+     * For HTML generation convenience funcs.
+     * @type HTMLPurifier_Generator
      */
     protected $generator;
 
     /**
-     * Instance of HTMLPurifier_Config, for easy access
+     * For easy access.
+     * @type HTMLPurifier_Config
      */
     protected $config;
 
     /**
      * Initialize $generator.
      */
-    public function __construct() {
+    public function __construct()
+    {
     }
 
     /**
      * Give generator necessary configuration if possible
+     * @param HTMLPurifier_Config $config
      */
-    public function prepareGenerator($config) {
+    public function prepareGenerator($config)
+    {
         $all = $config->getAll();
         $context = new HTMLPurifier_Context();
         $this->generator = new HTMLPurifier_Generator($config, $context);
@@ -39,45 +44,62 @@ class HTMLPurifier_Printer
 
     /**
      * Returns a start tag
-     * @param $tag Tag name
-     * @param $attr Attribute array
+     * @param string $tag Tag name
+     * @param array $attr Attribute array
+     * @return string
      */
-    protected function start($tag, $attr = array()) {
+    protected function start($tag, $attr = array())
+    {
         return $this->generator->generateFromToken(
-                    new HTMLPurifier_Token_Start($tag, $attr ? $attr : array())
-               );
+            new HTMLPurifier_Token_Start($tag, $attr ? $attr : array())
+        );
     }
 
     /**
-     * Returns an end teg
-     * @param $tag Tag name
+     * Returns an end tag
+     * @param string $tag Tag name
+     * @return string
      */
-    protected function end($tag) {
+    protected function end($tag)
+    {
         return $this->generator->generateFromToken(
-                    new HTMLPurifier_Token_End($tag)
-               );
+            new HTMLPurifier_Token_End($tag)
+        );
     }
 
     /**
      * Prints a complete element with content inside
-     * @param $tag Tag name
-     * @param $contents Element contents
-     * @param $attr Tag attributes
-     * @param $escape Bool whether or not to escape contents
+     * @param string $tag Tag name
+     * @param string $contents Element contents
+     * @param array $attr Tag attributes
+     * @param bool $escape whether or not to escape contents
+     * @return string
      */
-    protected function element($tag, $contents, $attr = array(), $escape = true) {
+    protected function element($tag, $contents, $attr = array(), $escape = true)
+    {
         return $this->start($tag, $attr) .
-               ($escape ? $this->escape($contents) : $contents) .
-               $this->end($tag);
+            ($escape ? $this->escape($contents) : $contents) .
+            $this->end($tag);
     }
 
-    protected function elementEmpty($tag, $attr = array()) {
+    /**
+     * @param string $tag
+     * @param array $attr
+     * @return string
+     */
+    protected function elementEmpty($tag, $attr = array())
+    {
         return $this->generator->generateFromToken(
             new HTMLPurifier_Token_Empty($tag, $attr)
         );
     }
 
-    protected function text($text) {
+    /**
+     * @param string $text
+     * @return string
+     */
+    protected function text($text)
+    {
         return $this->generator->generateFromToken(
             new HTMLPurifier_Token_Text($text)
         );
@@ -85,24 +107,29 @@ class HTMLPurifier_Printer
 
     /**
      * Prints a simple key/value row in a table.
-     * @param $name Key
-     * @param $value Value
+     * @param string $name Key
+     * @param mixed $value Value
+     * @return string
      */
-    protected function row($name, $value) {
-        if (is_bool($value)) $value = $value ? 'On' : 'Off';
+    protected function row($name, $value)
+    {
+        if (is_bool($value)) {
+            $value = $value ? 'On' : 'Off';
+        }
         return
             $this->start('tr') . "\n" .
-                $this->element('th', $name) . "\n" .
-                $this->element('td', $value) . "\n" .
-            $this->end('tr')
-        ;
+            $this->element('th', $name) . "\n" .
+            $this->element('td', $value) . "\n" .
+            $this->end('tr');
     }
 
     /**
      * Escapes a string for HTML output.
-     * @param $string String to escape
+     * @param string $string String to escape
+     * @return string
      */
-    protected function escape($string) {
+    protected function escape($string)
+    {
         $string = HTMLPurifier_Encoder::cleanUTF8($string);
         $string = htmlspecialchars($string, ENT_COMPAT, 'UTF-8');
         return $string;
@@ -110,32 +137,46 @@ class HTMLPurifier_Printer
 
     /**
      * Takes a list of strings and turns them into a single list
-     * @param $array List of strings
-     * @param $polite Bool whether or not to add an end before the last
+     * @param string[] $array List of strings
+     * @param bool $polite Bool whether or not to add an end before the last
+     * @return string
      */
-    protected function listify($array, $polite = false) {
-        if (empty($array)) return 'None';
+    protected function listify($array, $polite = false)
+    {
+        if (empty($array)) {
+            return 'None';
+        }
         $ret = '';
         $i = count($array);
         foreach ($array as $value) {
             $i--;
             $ret .= $value;
-            if ($i > 0 && !($polite && $i == 1)) $ret .= ', ';
-            if ($polite && $i == 1) $ret .= 'and ';
+            if ($i > 0 && !($polite && $i == 1)) {
+                $ret .= ', ';
+            }
+            if ($polite && $i == 1) {
+                $ret .= 'and ';
+            }
         }
         return $ret;
     }
 
     /**
      * Retrieves the class of an object without prefixes, as well as metadata
-     * @param $obj Object to determine class of
-     * @param $prefix Further prefix to remove
+     * @param object $obj Object to determine class of
+     * @param string $sec_prefix Further prefix to remove
+     * @return string
      */
-    protected function getClass($obj, $sec_prefix = '') {
+    protected function getClass($obj, $sec_prefix = '')
+    {
         static $five = null;
-        if ($five === null) $five = version_compare(PHP_VERSION, '5', '>=');
+        if ($five === null) {
+            $five = version_compare(PHP_VERSION, '5', '>=');
+        }
         $prefix = 'HTMLPurifier_' . $sec_prefix;
-        if (!$five) $prefix = strtolower($prefix);
+        if (!$five) {
+            $prefix = strtolower($prefix);
+        }
         $class = str_replace($prefix, '', get_class($obj));
         $lclass = strtolower($class);
         $class .= '(';
@@ -164,13 +205,14 @@ class HTMLPurifier_Printer
                 break;
             case 'css_importantdecorator':
                 $class .= $this->getClass($obj->def, $sec_prefix);
-                if ($obj->allow) $class .= ', !important';
+                if ($obj->allow) {
+                    $class .= ', !important';
+                }
                 break;
         }
         $class .= ')';
         return $class;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Printer/CSSDefinition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/CSSDefinition.php
similarity index 85%
rename from library/HTMLPurifier/Printer/CSSDefinition.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/CSSDefinition.php
index 81f9865901..29505fe12d 100644
--- a/library/HTMLPurifier/Printer/CSSDefinition.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/CSSDefinition.php
@@ -2,10 +2,17 @@
 
 class HTMLPurifier_Printer_CSSDefinition extends HTMLPurifier_Printer
 {
-
+    /**
+     * @type HTMLPurifier_CSSDefinition
+     */
     protected $def;
 
-    public function render($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return string
+     */
+    public function render($config)
+    {
         $this->def = $config->getCSSDefinition();
         $ret = '';
 
@@ -32,7 +39,6 @@ class HTMLPurifier_Printer_CSSDefinition extends HTMLPurifier_Printer
 
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Printer/ConfigForm.css b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.css
similarity index 100%
rename from library/HTMLPurifier/Printer/ConfigForm.css
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.css
diff --git a/library/HTMLPurifier/Printer/ConfigForm.js b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.js
similarity index 100%
rename from library/HTMLPurifier/Printer/ConfigForm.js
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.js
diff --git a/library/HTMLPurifier/Printer/ConfigForm.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.php
similarity index 60%
rename from library/HTMLPurifier/Printer/ConfigForm.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.php
index 02aa656894..36100ce738 100644
--- a/library/HTMLPurifier/Printer/ConfigForm.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/ConfigForm.php
@@ -7,17 +7,20 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
 {
 
     /**
-     * Printers for specific fields
+     * Printers for specific fields.
+     * @type HTMLPurifier_Printer[]
      */
     protected $fields = array();
 
     /**
-     * Documentation URL, can have fragment tagged on end
+     * Documentation URL, can have fragment tagged on end.
+     * @type string
      */
     protected $docURL;
 
     /**
-     * Name of form element to stuff config in
+     * Name of form element to stuff config in.
+     * @type string
      */
     protected $name;
 
@@ -25,24 +28,27 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
      * Whether or not to compress directive names, clipping them off
      * after a certain amount of letters. False to disable or integer letters
      * before clipping.
+     * @type bool
      */
     protected $compress = false;
 
     /**
-     * @param $name Form element name for directives to be stuffed into
-     * @param $doc_url String documentation URL, will have fragment tagged on
-     * @param $compress Integer max length before compressing a directive name, set to false to turn off
+     * @param string $name Form element name for directives to be stuffed into
+     * @param string $doc_url String documentation URL, will have fragment tagged on
+     * @param bool $compress Integer max length before compressing a directive name, set to false to turn off
      */
     public function __construct(
-        $name, $doc_url = null, $compress = false
+        $name,
+        $doc_url = null,
+        $compress = false
     ) {
         parent::__construct();
         $this->docURL = $doc_url;
-        $this->name   = $name;
+        $this->name = $name;
         $this->compress = $compress;
         // initialize sub-printers
-        $this->fields[0]    = new HTMLPurifier_Printer_ConfigForm_default();
-        $this->fields[HTMLPurifier_VarParser::BOOL]       = new HTMLPurifier_Printer_ConfigForm_bool();
+        $this->fields[0] = new HTMLPurifier_Printer_ConfigForm_default();
+        $this->fields[HTMLPurifier_VarParser::BOOL] = new HTMLPurifier_Printer_ConfigForm_bool();
     }
 
     /**
@@ -50,32 +56,42 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
      * @param $cols Integer columns of textarea, null to use default
      * @param $rows Integer rows of textarea, null to use default
      */
-    public function setTextareaDimensions($cols = null, $rows = null) {
-        if ($cols) $this->fields['default']->cols = $cols;
-        if ($rows) $this->fields['default']->rows = $rows;
+    public function setTextareaDimensions($cols = null, $rows = null)
+    {
+        if ($cols) {
+            $this->fields['default']->cols = $cols;
+        }
+        if ($rows) {
+            $this->fields['default']->rows = $rows;
+        }
     }
 
     /**
      * Retrieves styling, in case it is not accessible by webserver
      */
-    public static function getCSS() {
+    public static function getCSS()
+    {
         return file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/Printer/ConfigForm.css');
     }
 
     /**
      * Retrieves JavaScript, in case it is not accessible by webserver
      */
-    public static function getJavaScript() {
+    public static function getJavaScript()
+    {
         return file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/Printer/ConfigForm.js');
     }
 
     /**
      * Returns HTML output for a configuration form
-     * @param $config Configuration object of current form state, or an array
+     * @param HTMLPurifier_Config|array $config Configuration object of current form state, or an array
      *        where [0] has an HTML namespace and [1] is being rendered.
-     * @param $allowed Optional namespace(s) and directives to restrict form to.
+     * @param array|bool $allowed Optional namespace(s) and directives to restrict form to.
+     * @param bool $render_controls
+     * @return string
      */
-    public function render($config, $allowed = true, $render_controls = true) {
+    public function render($config, $allowed = true, $render_controls = true)
+    {
         if (is_array($config) && isset($config[0])) {
             $gen_config = $config[0];
             $config = $config[1];
@@ -91,29 +107,29 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
         $all = array();
         foreach ($allowed as $key) {
             list($ns, $directive) = $key;
-            $all[$ns][$directive] = $config->get($ns .'.'. $directive);
+            $all[$ns][$directive] = $config->get($ns . '.' . $directive);
         }
 
         $ret = '';
         $ret .= $this->start('table', array('class' => 'hp-config'));
         $ret .= $this->start('thead');
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Directive', array('class' => 'hp-directive'));
-            $ret .= $this->element('th', 'Value', array('class' => 'hp-value'));
+        $ret .= $this->element('th', 'Directive', array('class' => 'hp-directive'));
+        $ret .= $this->element('th', 'Value', array('class' => 'hp-value'));
         $ret .= $this->end('tr');
         $ret .= $this->end('thead');
         foreach ($all as $ns => $directives) {
             $ret .= $this->renderNamespace($ns, $directives);
         }
         if ($render_controls) {
-             $ret .= $this->start('tbody');
-             $ret .= $this->start('tr');
-                 $ret .= $this->start('td', array('colspan' => 2, 'class' => 'controls'));
-                     $ret .= $this->elementEmpty('input', array('type' => 'submit', 'value' => 'Submit'));
-                     $ret .= '[<a href="?">Reset</a>]';
-                 $ret .= $this->end('td');
-             $ret .= $this->end('tr');
-             $ret .= $this->end('tbody');
+            $ret .= $this->start('tbody');
+            $ret .= $this->start('tr');
+            $ret .= $this->start('td', array('colspan' => 2, 'class' => 'controls'));
+            $ret .= $this->elementEmpty('input', array('type' => 'submit', 'value' => 'Submit'));
+            $ret .= '[<a href="?">Reset</a>]';
+            $ret .= $this->end('td');
+            $ret .= $this->end('tr');
+            $ret .= $this->end('tbody');
         }
         $ret .= $this->end('table');
         return $ret;
@@ -122,13 +138,15 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
     /**
      * Renders a single namespace
      * @param $ns String namespace name
-     * @param $directive Associative array of directives to values
+     * @param array $directives array of directives to values
+     * @return string
      */
-    protected function renderNamespace($ns, $directives) {
+    protected function renderNamespace($ns, $directives)
+    {
         $ret = '';
         $ret .= $this->start('tbody', array('class' => 'namespace'));
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', $ns, array('colspan' => 2));
+        $ret .= $this->element('th', $ns, array('colspan' => 2));
         $ret .= $this->end('tr');
         $ret .= $this->end('tbody');
         $ret .= $this->start('tbody');
@@ -139,40 +157,44 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
                 $url = str_replace('%s', urlencode("$ns.$directive"), $this->docURL);
                 $ret .= $this->start('a', array('href' => $url));
             }
-                $attr = array('for' => "{$this->name}:$ns.$directive");
+            $attr = array('for' => "{$this->name}:$ns.$directive");
 
-                // crop directive name if it's too long
-                if (!$this->compress || (strlen($directive) < $this->compress)) {
-                    $directive_disp = $directive;
-                } else {
-                    $directive_disp = substr($directive, 0, $this->compress - 2) . '...';
-                    $attr['title'] = $directive;
-                }
+            // crop directive name if it's too long
+            if (!$this->compress || (strlen($directive) < $this->compress)) {
+                $directive_disp = $directive;
+            } else {
+                $directive_disp = substr($directive, 0, $this->compress - 2) . '...';
+                $attr['title'] = $directive;
+            }
 
-                $ret .= $this->element(
-                    'label',
-                    $directive_disp,
-                    // component printers must create an element with this id
-                    $attr
-                );
-            if ($this->docURL) $ret .= $this->end('a');
+            $ret .= $this->element(
+                'label',
+                $directive_disp,
+                // component printers must create an element with this id
+                $attr
+            );
+            if ($this->docURL) {
+                $ret .= $this->end('a');
+            }
             $ret .= $this->end('th');
 
             $ret .= $this->start('td');
-                $def = $this->config->def->info["$ns.$directive"];
-                if (is_int($def)) {
-                    $allow_null = $def < 0;
-                    $type = abs($def);
-                } else {
-                    $type = $def->type;
-                    $allow_null = isset($def->allow_null);
-                }
-                if (!isset($this->fields[$type])) $type = 0; // default
-                $type_obj = $this->fields[$type];
-                if ($allow_null) {
-                    $type_obj = new HTMLPurifier_Printer_ConfigForm_NullDecorator($type_obj);
-                }
-                $ret .= $type_obj->render($ns, $directive, $value, $this->name, array($this->genConfig, $this->config));
+            $def = $this->config->def->info["$ns.$directive"];
+            if (is_int($def)) {
+                $allow_null = $def < 0;
+                $type = abs($def);
+            } else {
+                $type = $def->type;
+                $allow_null = isset($def->allow_null);
+            }
+            if (!isset($this->fields[$type])) {
+                $type = 0;
+            } // default
+            $type_obj = $this->fields[$type];
+            if ($allow_null) {
+                $type_obj = new HTMLPurifier_Printer_ConfigForm_NullDecorator($type_obj);
+            }
+            $ret .= $type_obj->render($ns, $directive, $value, $this->name, array($this->genConfig, $this->config));
             $ret .= $this->end('td');
             $ret .= $this->end('tr');
         }
@@ -185,19 +207,33 @@ class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
 /**
  * Printer decorator for directives that accept null
  */
-class HTMLPurifier_Printer_ConfigForm_NullDecorator extends HTMLPurifier_Printer {
+class HTMLPurifier_Printer_ConfigForm_NullDecorator extends HTMLPurifier_Printer
+{
     /**
      * Printer being decorated
+     * @type HTMLPurifier_Printer
      */
     protected $obj;
+
     /**
-     * @param $obj Printer to decorate
+     * @param HTMLPurifier_Printer $obj Printer to decorate
      */
-    public function __construct($obj) {
+    public function __construct($obj)
+    {
         parent::__construct();
         $this->obj = $obj;
     }
-    public function render($ns, $directive, $value, $name, $config) {
+
+    /**
+     * @param string $ns
+     * @param string $directive
+     * @param string $value
+     * @param string $name
+     * @param HTMLPurifier_Config|array $config
+     * @return string
+     */
+    public function render($ns, $directive, $value, $name, $config)
+    {
         if (is_array($config) && isset($config[0])) {
             $gen_config = $config[0];
             $config = $config[1];
@@ -215,15 +251,19 @@ class HTMLPurifier_Printer_ConfigForm_NullDecorator extends HTMLPurifier_Printer
             'type' => 'checkbox',
             'value' => '1',
             'class' => 'null-toggle',
-            'name' => "$name"."[Null_$ns.$directive]",
+            'name' => "$name" . "[Null_$ns.$directive]",
             'id' => "$name:Null_$ns.$directive",
             'onclick' => "toggleWriteability('$name:$ns.$directive',checked)" // INLINE JAVASCRIPT!!!!
         );
         if ($this->obj instanceof HTMLPurifier_Printer_ConfigForm_bool) {
             // modify inline javascript slightly
-            $attr['onclick'] = "toggleWriteability('$name:Yes_$ns.$directive',checked);toggleWriteability('$name:No_$ns.$directive',checked)";
+            $attr['onclick'] =
+                "toggleWriteability('$name:Yes_$ns.$directive',checked);" .
+                "toggleWriteability('$name:No_$ns.$directive',checked)";
+        }
+        if ($value === null) {
+            $attr['checked'] = 'checked';
         }
-        if ($value === null) $attr['checked'] = 'checked';
         $ret .= $this->elementEmpty('input', $attr);
         $ret .= $this->text(' or ');
         $ret .= $this->elementEmpty('br');
@@ -235,10 +275,28 @@ class HTMLPurifier_Printer_ConfigForm_NullDecorator extends HTMLPurifier_Printer
 /**
  * Swiss-army knife configuration form field printer
  */
-class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer {
+class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer
+{
+    /**
+     * @type int
+     */
     public $cols = 18;
+
+    /**
+     * @type int
+     */
     public $rows = 5;
-    public function render($ns, $directive, $value, $name, $config) {
+
+    /**
+     * @param string $ns
+     * @param string $directive
+     * @param string $value
+     * @param string $name
+     * @param HTMLPurifier_Config|array $config
+     * @return string
+     */
+    public function render($ns, $directive, $value, $name, $config)
+    {
         if (is_array($config) && isset($config[0])) {
             $gen_config = $config[0];
             $config = $config[1];
@@ -262,6 +320,7 @@ class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer {
                     foreach ($array as $val => $b) {
                         $value[] = $val;
                     }
+                    //TODO does this need a break?
                 case HTMLPurifier_VarParser::ALIST:
                     $value = implode(PHP_EOL, $value);
                     break;
@@ -281,25 +340,27 @@ class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer {
             $value = serialize($value);
         }
         $attr = array(
-            'name' => "$name"."[$ns.$directive]",
+            'name' => "$name" . "[$ns.$directive]",
             'id' => "$name:$ns.$directive"
         );
-        if ($value === null) $attr['disabled'] = 'disabled';
+        if ($value === null) {
+            $attr['disabled'] = 'disabled';
+        }
         if (isset($def->allowed)) {
             $ret .= $this->start('select', $attr);
             foreach ($def->allowed as $val => $b) {
                 $attr = array();
-                if ($value == $val) $attr['selected'] = 'selected';
+                if ($value == $val) {
+                    $attr['selected'] = 'selected';
+                }
                 $ret .= $this->element('option', $val, $attr);
             }
             $ret .= $this->end('select');
-        } elseif (
-            $type === HTMLPurifier_VarParser::TEXT ||
-            $type === HTMLPurifier_VarParser::ITEXT ||
-            $type === HTMLPurifier_VarParser::ALIST ||
-            $type === HTMLPurifier_VarParser::HASH ||
-            $type === HTMLPurifier_VarParser::LOOKUP
-        ) {
+        } elseif ($type === HTMLPurifier_VarParser::TEXT ||
+                $type === HTMLPurifier_VarParser::ITEXT ||
+                $type === HTMLPurifier_VarParser::ALIST ||
+                $type === HTMLPurifier_VarParser::HASH ||
+                $type === HTMLPurifier_VarParser::LOOKUP) {
             $attr['cols'] = $this->cols;
             $attr['rows'] = $this->rows;
             $ret .= $this->start('textarea', $attr);
@@ -317,8 +378,18 @@ class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer {
 /**
  * Bool form field printer
  */
-class HTMLPurifier_Printer_ConfigForm_bool extends HTMLPurifier_Printer {
-    public function render($ns, $directive, $value, $name, $config) {
+class HTMLPurifier_Printer_ConfigForm_bool extends HTMLPurifier_Printer
+{
+    /**
+     * @param string $ns
+     * @param string $directive
+     * @param string $value
+     * @param string $name
+     * @param HTMLPurifier_Config|array $config
+     * @return string
+     */
+    public function render($ns, $directive, $value, $name, $config)
+    {
         if (is_array($config) && isset($config[0])) {
             $gen_config = $config[0];
             $config = $config[1];
@@ -336,12 +407,16 @@ class HTMLPurifier_Printer_ConfigForm_bool extends HTMLPurifier_Printer {
 
         $attr = array(
             'type' => 'radio',
-            'name' => "$name"."[$ns.$directive]",
+            'name' => "$name" . "[$ns.$directive]",
             'id' => "$name:Yes_$ns.$directive",
             'value' => '1'
         );
-        if ($value === true) $attr['checked'] = 'checked';
-        if ($value === null) $attr['disabled'] = 'disabled';
+        if ($value === true) {
+            $attr['checked'] = 'checked';
+        }
+        if ($value === null) {
+            $attr['disabled'] = 'disabled';
+        }
         $ret .= $this->elementEmpty('input', $attr);
 
         $ret .= $this->start('label', array('for' => "$name:No_$ns.$directive"));
@@ -351,12 +426,16 @@ class HTMLPurifier_Printer_ConfigForm_bool extends HTMLPurifier_Printer {
 
         $attr = array(
             'type' => 'radio',
-            'name' => "$name"."[$ns.$directive]",
+            'name' => "$name" . "[$ns.$directive]",
             'id' => "$name:No_$ns.$directive",
             'value' => '0'
         );
-        if ($value === false) $attr['checked'] = 'checked';
-        if ($value === null) $attr['disabled'] = 'disabled';
+        if ($value === false) {
+            $attr['checked'] = 'checked';
+        }
+        if ($value === null) {
+            $attr['disabled'] = 'disabled';
+        }
         $ret .= $this->elementEmpty('input', $attr);
 
         $ret .= $this->end('div');
diff --git a/library/HTMLPurifier/Printer/HTMLDefinition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/HTMLDefinition.php
similarity index 53%
rename from library/HTMLPurifier/Printer/HTMLDefinition.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/HTMLDefinition.php
index 8a8f126b81..5f2f2f8a7c 100644
--- a/library/HTMLPurifier/Printer/HTMLDefinition.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Printer/HTMLDefinition.php
@@ -4,11 +4,16 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 {
 
     /**
-     * Instance of HTMLPurifier_HTMLDefinition, for easy access
+     * @type HTMLPurifier_HTMLDefinition, for easy access
      */
     protected $def;
 
-    public function render($config) {
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return string
+     */
+    public function render($config)
+    {
         $ret = '';
         $this->config =& $config;
 
@@ -28,8 +33,10 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Renders the Doctype table
+     * @return string
      */
-    protected function renderDoctype() {
+    protected function renderDoctype()
+    {
         $doctype = $this->def->doctype;
         $ret = '';
         $ret .= $this->start('table');
@@ -45,8 +52,10 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Renders environment table, which is miscellaneous info
+     * @return string
      */
-    protected function renderEnvironment() {
+    protected function renderEnvironment()
+    {
         $def = $this->def;
 
         $ret = '';
@@ -59,28 +68,28 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
         $ret .= $this->row('Block wrap name', $def->info_block_wrapper);
 
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Global attributes');
-            $ret .= $this->element('td', $this->listifyAttr($def->info_global_attr),0,0);
+        $ret .= $this->element('th', 'Global attributes');
+        $ret .= $this->element('td', $this->listifyAttr($def->info_global_attr), null, 0);
         $ret .= $this->end('tr');
 
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Tag transforms');
-            $list = array();
-            foreach ($def->info_tag_transform as $old => $new) {
-                $new = $this->getClass($new, 'TagTransform_');
-                $list[] = "<$old> with $new";
-            }
-            $ret .= $this->element('td', $this->listify($list));
+        $ret .= $this->element('th', 'Tag transforms');
+        $list = array();
+        foreach ($def->info_tag_transform as $old => $new) {
+            $new = $this->getClass($new, 'TagTransform_');
+            $list[] = "<$old> with $new";
+        }
+        $ret .= $this->element('td', $this->listify($list));
         $ret .= $this->end('tr');
 
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Pre-AttrTransform');
-            $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_pre));
+        $ret .= $this->element('th', 'Pre-AttrTransform');
+        $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_pre));
         $ret .= $this->end('tr');
 
         $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Post-AttrTransform');
-            $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_post));
+        $ret .= $this->element('th', 'Post-AttrTransform');
+        $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_post));
         $ret .= $this->end('tr');
 
         $ret .= $this->end('table');
@@ -89,8 +98,10 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Renders the Content Sets table
+     * @return string
      */
-    protected function renderContentSets() {
+    protected function renderContentSets()
+    {
         $ret = '';
         $ret .= $this->start('table');
         $ret .= $this->element('caption', 'Content Sets');
@@ -106,8 +117,10 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Renders the Elements ($info) table
+     * @return string
      */
-    protected function renderInfo() {
+    protected function renderInfo()
+    {
         $ret = '';
         $ret .= $this->start('table');
         $ret .= $this->element('caption', 'Elements ($info)');
@@ -118,39 +131,39 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
         $ret .= $this->end('tr');
         foreach ($this->def->info as $name => $def) {
             $ret .= $this->start('tr');
-                $ret .= $this->element('th', "<$name>", array('class'=>'heavy', 'colspan' => 2));
+            $ret .= $this->element('th', "<$name>", array('class' => 'heavy', 'colspan' => 2));
             $ret .= $this->end('tr');
             $ret .= $this->start('tr');
-                $ret .= $this->element('th', 'Inline content');
-                $ret .= $this->element('td', $def->descendants_are_inline ? 'Yes' : 'No');
+            $ret .= $this->element('th', 'Inline content');
+            $ret .= $this->element('td', $def->descendants_are_inline ? 'Yes' : 'No');
             $ret .= $this->end('tr');
             if (!empty($def->excludes)) {
                 $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Excludes');
-                    $ret .= $this->element('td', $this->listifyTagLookup($def->excludes));
+                $ret .= $this->element('th', 'Excludes');
+                $ret .= $this->element('td', $this->listifyTagLookup($def->excludes));
                 $ret .= $this->end('tr');
             }
             if (!empty($def->attr_transform_pre)) {
                 $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Pre-AttrTransform');
-                    $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_pre));
+                $ret .= $this->element('th', 'Pre-AttrTransform');
+                $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_pre));
                 $ret .= $this->end('tr');
             }
             if (!empty($def->attr_transform_post)) {
                 $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Post-AttrTransform');
-                    $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_post));
+                $ret .= $this->element('th', 'Post-AttrTransform');
+                $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_post));
                 $ret .= $this->end('tr');
             }
             if (!empty($def->auto_close)) {
                 $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Auto closed by');
-                    $ret .= $this->element('td', $this->listifyTagLookup($def->auto_close));
+                $ret .= $this->element('th', 'Auto closed by');
+                $ret .= $this->element('td', $this->listifyTagLookup($def->auto_close));
                 $ret .= $this->end('tr');
             }
             $ret .= $this->start('tr');
-                $ret .= $this->element('th', 'Allowed attributes');
-                $ret .= $this->element('td',$this->listifyAttr($def->attr), array(), 0);
+            $ret .= $this->element('th', 'Allowed attributes');
+            $ret .= $this->element('td', $this->listifyAttr($def->attr), array(), 0);
             $ret .= $this->end('tr');
 
             if (!empty($def->required_attr)) {
@@ -165,64 +178,94 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Renders a row describing the allowed children of an element
-     * @param $def HTMLPurifier_ChildDef of pertinent element
+     * @param HTMLPurifier_ChildDef $def HTMLPurifier_ChildDef of pertinent element
+     * @return string
      */
-    protected function renderChildren($def) {
+    protected function renderChildren($def)
+    {
         $context = new HTMLPurifier_Context();
         $ret = '';
         $ret .= $this->start('tr');
+        $elements = array();
+        $attr = array();
+        if (isset($def->elements)) {
+            if ($def->type == 'strictblockquote') {
+                $def->validateChildren(array(), $this->config, $context);
+            }
+            $elements = $def->elements;
+        }
+        if ($def->type == 'chameleon') {
+            $attr['rowspan'] = 2;
+        } elseif ($def->type == 'empty') {
             $elements = array();
-            $attr = array();
-            if (isset($def->elements)) {
-                if ($def->type == 'strictblockquote') {
-                    $def->validateChildren(array(), $this->config, $context);
-                }
-                $elements = $def->elements;
-            }
-            if ($def->type == 'chameleon') {
-                $attr['rowspan'] = 2;
-            } elseif ($def->type == 'empty') {
-                $elements = array();
-            } elseif ($def->type == 'table') {
-                $elements = array_flip(array('col', 'caption', 'colgroup', 'thead',
-                    'tfoot', 'tbody', 'tr'));
-            }
-            $ret .= $this->element('th', 'Allowed children', $attr);
+        } elseif ($def->type == 'table') {
+            $elements = array_flip(
+                array(
+                    'col',
+                    'caption',
+                    'colgroup',
+                    'thead',
+                    'tfoot',
+                    'tbody',
+                    'tr'
+                )
+            );
+        }
+        $ret .= $this->element('th', 'Allowed children', $attr);
 
-            if ($def->type == 'chameleon') {
+        if ($def->type == 'chameleon') {
 
-                $ret .= $this->element('td',
-                    '<em>Block</em>: ' .
-                    $this->escape($this->listifyTagLookup($def->block->elements)),0,0);
-                $ret .= $this->end('tr');
-                $ret .= $this->start('tr');
-                $ret .= $this->element('td',
-                    '<em>Inline</em>: ' .
-                    $this->escape($this->listifyTagLookup($def->inline->elements)),0,0);
+            $ret .= $this->element(
+                'td',
+                '<em>Block</em>: ' .
+                $this->escape($this->listifyTagLookup($def->block->elements)),
+                null,
+                0
+            );
+            $ret .= $this->end('tr');
+            $ret .= $this->start('tr');
+            $ret .= $this->element(
+                'td',
+                '<em>Inline</em>: ' .
+                $this->escape($this->listifyTagLookup($def->inline->elements)),
+                null,
+                0
+            );
 
-            } elseif ($def->type == 'custom') {
+        } elseif ($def->type == 'custom') {
 
-                $ret .= $this->element('td', '<em>'.ucfirst($def->type).'</em>: ' .
-                    $def->dtd_regex);
+            $ret .= $this->element(
+                'td',
+                '<em>' . ucfirst($def->type) . '</em>: ' .
+                $def->dtd_regex
+            );
 
-            } else {
-                $ret .= $this->element('td',
-                    '<em>'.ucfirst($def->type).'</em>: ' .
-                    $this->escape($this->listifyTagLookup($elements)),0,0);
-            }
+        } else {
+            $ret .= $this->element(
+                'td',
+                '<em>' . ucfirst($def->type) . '</em>: ' .
+                $this->escape($this->listifyTagLookup($elements)),
+                null,
+                0
+            );
+        }
         $ret .= $this->end('tr');
         return $ret;
     }
 
     /**
      * Listifies a tag lookup table.
-     * @param $array Tag lookup array in form of array('tagname' => true)
+     * @param array $array Tag lookup array in form of array('tagname' => true)
+     * @return string
      */
-    protected function listifyTagLookup($array) {
+    protected function listifyTagLookup($array)
+    {
         ksort($array);
         $list = array();
         foreach ($array as $name => $discard) {
-            if ($name !== '#PCDATA' && !isset($this->def->info[$name])) continue;
+            if ($name !== '#PCDATA' && !isset($this->def->info[$name])) {
+                continue;
+            }
             $list[] = $name;
         }
         return $this->listify($list);
@@ -230,13 +273,15 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Listifies a list of objects by retrieving class names and internal state
-     * @param $array List of objects
+     * @param array $array List of objects
+     * @return string
      * @todo Also add information about internal state
      */
-    protected function listifyObjectList($array) {
+    protected function listifyObjectList($array)
+    {
         ksort($array);
         $list = array();
-        foreach ($array as $discard => $obj) {
+        foreach ($array as $obj) {
             $list[] = $this->getClass($obj, 'AttrTransform_');
         }
         return $this->listify($list);
@@ -244,13 +289,17 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Listifies a hash of attributes to AttrDef classes
-     * @param $array Array hash in form of array('attrname' => HTMLPurifier_AttrDef)
+     * @param array $array Array hash in form of array('attrname' => HTMLPurifier_AttrDef)
+     * @return string
      */
-    protected function listifyAttr($array) {
+    protected function listifyAttr($array)
+    {
         ksort($array);
         $list = array();
         foreach ($array as $name => $obj) {
-            if ($obj === false) continue;
+            if ($obj === false) {
+                continue;
+            }
             $list[] = "$name&nbsp;=&nbsp;<i>" . $this->getClass($obj, 'AttrDef_') . '</i>';
         }
         return $this->listify($list);
@@ -258,15 +307,18 @@ class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
 
     /**
      * Creates a heavy header row
+     * @param string $text
+     * @param int $num
+     * @return string
      */
-    protected function heavyHeader($text, $num = 1) {
+    protected function heavyHeader($text, $num = 1)
+    {
         $ret = '';
         $ret .= $this->start('tr');
         $ret .= $this->element('th', $text, array('colspan' => $num, 'class' => 'heavy'));
         $ret .= $this->end('tr');
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/PropertyList.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyList.php
similarity index 50%
rename from library/HTMLPurifier/PropertyList.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyList.php
index 2b99fb7bc3..189348fd9e 100644
--- a/library/HTMLPurifier/PropertyList.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyList.php
@@ -6,61 +6,93 @@
 class HTMLPurifier_PropertyList
 {
     /**
-     * Internal data-structure for properties
+     * Internal data-structure for properties.
+     * @type array
      */
     protected $data = array();
 
     /**
-     * Parent plist
+     * Parent plist.
+     * @type HTMLPurifier_PropertyList
      */
     protected $parent;
 
+    /**
+     * Cache.
+     * @type array
+     */
     protected $cache;
 
-    public function __construct($parent = null) {
+    /**
+     * @param HTMLPurifier_PropertyList $parent Parent plist
+     */
+    public function __construct($parent = null)
+    {
         $this->parent = $parent;
     }
 
     /**
      * Recursively retrieves the value for a key
+     * @param string $name
+     * @throws HTMLPurifier_Exception
      */
-    public function get($name) {
-        if ($this->has($name)) return $this->data[$name];
+    public function get($name)
+    {
+        if ($this->has($name)) {
+            return $this->data[$name];
+        }
         // possible performance bottleneck, convert to iterative if necessary
-        if ($this->parent) return $this->parent->get($name);
+        if ($this->parent) {
+            return $this->parent->get($name);
+        }
         throw new HTMLPurifier_Exception("Key '$name' not found");
     }
 
     /**
      * Sets the value of a key, for this plist
+     * @param string $name
+     * @param mixed $value
      */
-    public function set($name, $value) {
+    public function set($name, $value)
+    {
         $this->data[$name] = $value;
     }
 
     /**
      * Returns true if a given key exists
+     * @param string $name
+     * @return bool
      */
-    public function has($name) {
+    public function has($name)
+    {
         return array_key_exists($name, $this->data);
     }
 
     /**
      * Resets a value to the value of it's parent, usually the default. If
      * no value is specified, the entire plist is reset.
+     * @param string $name
      */
-    public function reset($name = null) {
-        if ($name == null) $this->data = array();
-        else unset($this->data[$name]);
+    public function reset($name = null)
+    {
+        if ($name == null) {
+            $this->data = array();
+        } else {
+            unset($this->data[$name]);
+        }
     }
 
     /**
      * Squashes this property list and all of its property lists into a single
      * array, and returns the array. This value is cached by default.
-     * @param $force If true, ignores the cache and regenerates the array.
+     * @param bool $force If true, ignores the cache and regenerates the array.
+     * @return array
      */
-    public function squash($force = false) {
-        if ($this->cache !== null && !$force) return $this->cache;
+    public function squash($force = false)
+    {
+        if ($this->cache !== null && !$force) {
+            return $this->cache;
+        }
         if ($this->parent) {
             return $this->cache = array_merge($this->parent->squash($force), $this->data);
         } else {
@@ -70,15 +102,19 @@ class HTMLPurifier_PropertyList
 
     /**
      * Returns the parent plist.
+     * @return HTMLPurifier_PropertyList
      */
-    public function getParent() {
+    public function getParent()
+    {
         return $this->parent;
     }
 
     /**
      * Sets the parent plist.
+     * @param HTMLPurifier_PropertyList $plist Parent plist
      */
-    public function setParent($plist) {
+    public function setParent($plist)
+    {
         $this->parent = $plist;
     }
 }
diff --git a/library/HTMLPurifier/PropertyListIterator.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyListIterator.php
similarity index 60%
rename from library/HTMLPurifier/PropertyListIterator.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyListIterator.php
index 8f250443e4..15b330ea30 100644
--- a/library/HTMLPurifier/PropertyListIterator.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/PropertyListIterator.php
@@ -6,27 +6,37 @@
 class HTMLPurifier_PropertyListIterator extends FilterIterator
 {
 
+    /**
+     * @type int
+     */
     protected $l;
+    /**
+     * @type string
+     */
     protected $filter;
 
     /**
-     * @param $data Array of data to iterate over
-     * @param $filter Optional prefix to only allow values of
+     * @param Iterator $iterator Array of data to iterate over
+     * @param string $filter Optional prefix to only allow values of
      */
-    public function __construct(Iterator $iterator, $filter = null) {
+    public function __construct(Iterator $iterator, $filter = null)
+    {
         parent::__construct($iterator);
         $this->l = strlen($filter);
         $this->filter = $filter;
     }
 
-    public function accept() {
+    /**
+     * @return bool
+     */
+    public function accept()
+    {
         $key = $this->getInnerIterator()->key();
-        if( strncmp($key, $this->filter, $this->l) !== 0 ) {
+        if (strncmp($key, $this->filter, $this->l) !== 0) {
             return false;
         }
         return true;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Queue.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Queue.php
new file mode 100644
index 0000000000..f58db9042a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Queue.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * A simple array-backed queue, based off of the classic Okasaki
+ * persistent amortized queue.  The basic idea is to maintain two
+ * stacks: an input stack and an output stack.  When the output
+ * stack runs out, reverse the input stack and use it as the output
+ * stack.
+ *
+ * We don't use the SPL implementation because it's only supported
+ * on PHP 5.3 and later.
+ *
+ * Exercise: Prove that push/pop on this queue take amortized O(1) time.
+ *
+ * Exercise: Extend this queue to be a deque, while preserving amortized
+ * O(1) time.  Some care must be taken on rebalancing to avoid quadratic
+ * behaviour caused by repeatedly shuffling data from the input stack
+ * to the output stack and back.
+ */
+class HTMLPurifier_Queue {
+    private $input;
+    private $output;
+
+    public function __construct($input = array()) {
+        $this->input = $input;
+        $this->output = array();
+    }
+
+    /**
+     * Shifts an element off the front of the queue.
+     */
+    public function shift() {
+        if (empty($this->output)) {
+            $this->output = array_reverse($this->input);
+            $this->input = array();
+        }
+        if (empty($this->output)) {
+            return NULL;
+        }
+        return array_pop($this->output);
+    }
+
+    /**
+     * Pushes an element onto the front of the queue.
+     */
+    public function push($x) {
+        array_push($this->input, $x);
+    }
+
+    /**
+     * Checks if it's empty.
+     */
+    public function isEmpty() {
+        return empty($this->input) && empty($this->output);
+    }
+}
diff --git a/library/HTMLPurifier/Strategy.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy.php
similarity index 66%
rename from library/HTMLPurifier/Strategy.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy.php
index 2462865210..e1ff3b72df 100644
--- a/library/HTMLPurifier/Strategy.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy.php
@@ -15,12 +15,12 @@ abstract class HTMLPurifier_Strategy
     /**
      * Executes the strategy on the tokens.
      *
-     * @param $tokens Array of HTMLPurifier_Token objects to be operated on.
-     * @param $config Configuration options
-     * @returns Processed array of token objects.
+     * @param HTMLPurifier_Token[] $tokens Array of HTMLPurifier_Token objects to be operated on.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[] Processed array of token objects.
      */
     abstract public function execute($tokens, $config, $context);
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/Composite.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Composite.php
similarity index 61%
rename from library/HTMLPurifier/Strategy/Composite.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Composite.php
index 816490b799..d7d35ce7d1 100644
--- a/library/HTMLPurifier/Strategy/Composite.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Composite.php
@@ -8,18 +8,23 @@ abstract class HTMLPurifier_Strategy_Composite extends HTMLPurifier_Strategy
 
     /**
      * List of strategies to run tokens through.
+     * @type HTMLPurifier_Strategy[]
      */
     protected $strategies = array();
 
-    abstract public function __construct();
-
-    public function execute($tokens, $config, $context) {
+    /**
+     * @param HTMLPurifier_Token[] $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[]
+     */
+    public function execute($tokens, $config, $context)
+    {
         foreach ($this->strategies as $strategy) {
             $tokens = $strategy->execute($tokens, $config, $context);
         }
         return $tokens;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/Core.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Core.php
similarity index 92%
rename from library/HTMLPurifier/Strategy/Core.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Core.php
index d90e158606..4414c17d6e 100644
--- a/library/HTMLPurifier/Strategy/Core.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/Core.php
@@ -5,14 +5,13 @@
  */
 class HTMLPurifier_Strategy_Core extends HTMLPurifier_Strategy_Composite
 {
-
-    public function __construct() {
+    public function __construct()
+    {
         $this->strategies[] = new HTMLPurifier_Strategy_RemoveForeignElements();
         $this->strategies[] = new HTMLPurifier_Strategy_MakeWellFormed();
         $this->strategies[] = new HTMLPurifier_Strategy_FixNesting();
         $this->strategies[] = new HTMLPurifier_Strategy_ValidateAttributes();
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/FixNesting.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/FixNesting.php
new file mode 100644
index 0000000000..6fa673db9a
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/FixNesting.php
@@ -0,0 +1,181 @@
+<?php
+
+/**
+ * Takes a well formed list of tokens and fixes their nesting.
+ *
+ * HTML elements dictate which elements are allowed to be their children,
+ * for example, you can't have a p tag in a span tag.  Other elements have
+ * much more rigorous definitions: tables, for instance, require a specific
+ * order for their elements.  There are also constraints not expressible by
+ * document type definitions, such as the chameleon nature of ins/del
+ * tags and global child exclusions.
+ *
+ * The first major objective of this strategy is to iterate through all
+ * the nodes and determine whether or not their children conform to the
+ * element's definition.  If they do not, the child definition may
+ * optionally supply an amended list of elements that is valid or
+ * require that the entire node be deleted (and the previous node
+ * rescanned).
+ *
+ * The second objective is to ensure that explicitly excluded elements of
+ * an element do not appear in its children.  Code that accomplishes this
+ * task is pervasive through the strategy, though the two are distinct tasks
+ * and could, theoretically, be seperated (although it's not recommended).
+ *
+ * @note Whether or not unrecognized children are silently dropped or
+ *       translated into text depends on the child definitions.
+ *
+ * @todo Enable nodes to be bubbled out of the structure.  This is
+ *       easier with our new algorithm.
+ */
+
+class HTMLPurifier_Strategy_FixNesting extends HTMLPurifier_Strategy
+{
+
+    /**
+     * @param HTMLPurifier_Token[] $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array|HTMLPurifier_Token[]
+     */
+    public function execute($tokens, $config, $context)
+    {
+
+        //####################################################################//
+        // Pre-processing
+
+        // O(n) pass to convert to a tree, so that we can efficiently
+        // refer to substrings
+        $top_node = HTMLPurifier_Arborize::arborize($tokens, $config, $context);
+
+        // get a copy of the HTML definition
+        $definition = $config->getHTMLDefinition();
+
+        $excludes_enabled = !$config->get('Core.DisableExcludes');
+
+        // setup the context variable 'IsInline', for chameleon processing
+        // is 'false' when we are not inline, 'true' when it must always
+        // be inline, and an integer when it is inline for a certain
+        // branch of the document tree
+        $is_inline = $definition->info_parent_def->descendants_are_inline;
+        $context->register('IsInline', $is_inline);
+
+        // setup error collector
+        $e =& $context->get('ErrorCollector', true);
+
+        //####################################################################//
+        // Loop initialization
+
+        // stack that contains all elements that are excluded
+        // it is organized by parent elements, similar to $stack,
+        // but it is only populated when an element with exclusions is
+        // processed, i.e. there won't be empty exclusions.
+        $exclude_stack = array($definition->info_parent_def->excludes);
+
+        // variable that contains the start token while we are processing
+        // nodes. This enables error reporting to do its job
+        $node = $top_node;
+        // dummy token
+        list($token, $d) = $node->toTokenPair();
+        $context->register('CurrentNode', $node);
+        $context->register('CurrentToken', $token);
+
+        //####################################################################//
+        // Loop
+
+        // We need to implement a post-order traversal iteratively, to
+        // avoid running into stack space limits.  This is pretty tricky
+        // to reason about, so we just manually stack-ify the recursive
+        // variant:
+        //
+        //  function f($node) {
+        //      foreach ($node->children as $child) {
+        //          f($child);
+        //      }
+        //      validate($node);
+        //  }
+        //
+        // Thus, we will represent a stack frame as array($node,
+        // $is_inline, stack of children)
+        // e.g. array_reverse($node->children) - already processed
+        // children.
+
+        $parent_def = $definition->info_parent_def;
+        $stack = array(
+            array($top_node,
+                  $parent_def->descendants_are_inline,
+                  $parent_def->excludes, // exclusions
+                  0)
+            );
+
+        while (!empty($stack)) {
+            list($node, $is_inline, $excludes, $ix) = array_pop($stack);
+            // recursive call
+            $go = false;
+            $def = empty($stack) ? $definition->info_parent_def : $definition->info[$node->name];
+            while (isset($node->children[$ix])) {
+                $child = $node->children[$ix++];
+                if ($child instanceof HTMLPurifier_Node_Element) {
+                    $go = true;
+                    $stack[] = array($node, $is_inline, $excludes, $ix);
+                    $stack[] = array($child,
+                        // ToDo: I don't think it matters if it's def or
+                        // child_def, but double check this...
+                        $is_inline || $def->descendants_are_inline,
+                        empty($def->excludes) ? $excludes
+                                              : array_merge($excludes, $def->excludes),
+                        0);
+                    break;
+                }
+            };
+            if ($go) continue;
+            list($token, $d) = $node->toTokenPair();
+            // base case
+            if ($excludes_enabled && isset($excludes[$node->name])) {
+                $node->dead = true;
+                if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node excluded');
+            } else {
+                // XXX I suppose it would be slightly more efficient to
+                // avoid the allocation here and have children
+                // strategies handle it
+                $children = array();
+                foreach ($node->children as $child) {
+                    if (!$child->dead) $children[] = $child;
+                }
+                $result = $def->child->validateChildren($children, $config, $context);
+                if ($result === true) {
+                    // nop
+                    $node->children = $children;
+                } elseif ($result === false) {
+                    $node->dead = true;
+                    if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node removed');
+                } else {
+                    $node->children = $result;
+                    if ($e) {
+                        // XXX This will miss mutations of internal nodes. Perhaps defer to the child validators
+                        if (empty($result) && !empty($children)) {
+                            $e->send(E_ERROR, 'Strategy_FixNesting: Node contents removed');
+                        } else if ($result != $children) {
+                            $e->send(E_WARNING, 'Strategy_FixNesting: Node reorganized');
+                        }
+                    }
+                }
+            }
+        }
+
+        //####################################################################//
+        // Post-processing
+
+        // remove context variables
+        $context->destroy('IsInline');
+        $context->destroy('CurrentNode');
+        $context->destroy('CurrentToken');
+
+        //####################################################################//
+        // Return
+
+        return HTMLPurifier_Arborize::flatten($node, $config, $context);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/MakeWellFormed.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/MakeWellFormed.php
similarity index 52%
rename from library/HTMLPurifier/Strategy/MakeWellFormed.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/MakeWellFormed.php
index c736584007..e389e00116 100644
--- a/library/HTMLPurifier/Strategy/MakeWellFormed.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/MakeWellFormed.php
@@ -2,66 +2,97 @@
 
 /**
  * Takes tokens makes them well-formed (balance end tags, etc.)
+ *
+ * Specification of the armor attributes this strategy uses:
+ *
+ *      - MakeWellFormed_TagClosedError: This armor field is used to
+ *        suppress tag closed errors for certain tokens [TagClosedSuppress],
+ *        in particular, if a tag was generated automatically by HTML
+ *        Purifier, we may rely on our infrastructure to close it for us
+ *        and shouldn't report an error to the user [TagClosedAuto].
  */
 class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
 {
 
     /**
      * Array stream of tokens being processed.
+     * @type HTMLPurifier_Token[]
      */
     protected $tokens;
 
     /**
-     * Current index in $tokens.
+     * Current token.
+     * @type HTMLPurifier_Token
      */
-    protected $t;
+    protected $token;
+
+    /**
+     * Zipper managing the true state.
+     * @type HTMLPurifier_Zipper
+     */
+    protected $zipper;
 
     /**
      * Current nesting of elements.
+     * @type array
      */
     protected $stack;
 
     /**
      * Injectors active in this stream processing.
+     * @type HTMLPurifier_Injector[]
      */
     protected $injectors;
 
     /**
      * Current instance of HTMLPurifier_Config.
+     * @type HTMLPurifier_Config
      */
     protected $config;
 
     /**
      * Current instance of HTMLPurifier_Context.
+     * @type HTMLPurifier_Context
      */
     protected $context;
 
-    public function execute($tokens, $config, $context) {
-
+    /**
+     * @param HTMLPurifier_Token[] $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[]
+     * @throws HTMLPurifier_Exception
+     */
+    public function execute($tokens, $config, $context)
+    {
         $definition = $config->getHTMLDefinition();
 
         // local variables
         $generator = new HTMLPurifier_Generator($config, $context);
         $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
+        // used for autoclose early abortion
+        $global_parent_allowed_elements = $definition->info_parent_def->child->getAllowedElements($config);
         $e = $context->get('ErrorCollector', true);
-        $t = false; // token index
         $i = false; // injector index
-        $token      = false; // the current token
-        $reprocess  = false; // whether or not to reprocess the same token
+        list($zipper, $token) = HTMLPurifier_Zipper::fromArray($tokens);
+        if ($token === NULL) {
+            return array();
+        }
+        $reprocess = false; // whether or not to reprocess the same token
         $stack = array();
 
         // member variables
-        $this->stack   =& $stack;
-        $this->t       =& $t;
-        $this->tokens  =& $tokens;
-        $this->config  = $config;
+        $this->stack =& $stack;
+        $this->tokens =& $tokens;
+        $this->token =& $token;
+        $this->zipper =& $zipper;
+        $this->config = $config;
         $this->context = $context;
 
         // context variables
         $context->register('CurrentNesting', $stack);
-        $context->register('InputIndex',     $t);
-        $context->register('InputTokens',    $tokens);
-        $context->register('CurrentToken',   $token);
+        $context->register('InputZipper', $zipper);
+        $context->register('CurrentToken', $token);
 
         // -- begin INJECTOR --
 
@@ -73,9 +104,13 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
         unset($injectors['Custom']); // special case
         foreach ($injectors as $injector => $b) {
             // XXX: Fix with a legitimate lookup table of enabled filters
-            if (strpos($injector, '.') !== false) continue;
+            if (strpos($injector, '.') !== false) {
+                continue;
+            }
             $injector = "HTMLPurifier_Injector_$injector";
-            if (!$b) continue;
+            if (!$b) {
+                continue;
+            }
             $this->injectors[] = new $injector;
         }
         foreach ($def_injectors as $injector) {
@@ -83,7 +118,9 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             $this->injectors[] = $injector;
         }
         foreach ($custom_injectors as $injector) {
-            if (!$injector) continue;
+            if (!$injector) {
+                continue;
+            }
             if (is_string($injector)) {
                 $injector = "HTMLPurifier_Injector_$injector";
                 $injector = new $injector;
@@ -95,14 +132,16 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
         // variables for performance reasons
         foreach ($this->injectors as $ix => $injector) {
             $error = $injector->prepare($config, $context);
-            if (!$error) continue;
+            if (!$error) {
+                continue;
+            }
             array_splice($this->injectors, $ix, 1); // rm the injector
             trigger_error("Cannot enable {$injector->name} injector because $error is not allowed", E_USER_WARNING);
         }
 
         // -- end INJECTOR --
 
-        // a note on punting:
+        // a note on reprocessing:
         //      In order to reduce code duplication, whenever some code needs
         //      to make HTML changes in order to make things "correct", the
         //      new HTML gets sent through the purifier, regardless of its
@@ -111,70 +150,75 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
         //      punt ($reprocess = true; continue;) and it does that for us.
 
         // isset is in loop because $tokens size changes during loop exec
-        for (
-            $t = 0;
-            $t == 0 || isset($tokens[$t - 1]);
-            // only increment if we don't need to reprocess
-            $reprocess ? $reprocess = false : $t++
-        ) {
+        for (;;
+             // only increment if we don't need to reprocess
+             $reprocess ? $reprocess = false : $token = $zipper->next($token)) {
 
             // check for a rewind
-            if (is_int($i) && $i >= 0) {
+            if (is_int($i)) {
                 // possibility: disable rewinding if the current token has a
                 // rewind set on it already. This would offer protection from
                 // infinite loop, but might hinder some advanced rewinding.
-                $rewind_to = $this->injectors[$i]->getRewind();
-                if (is_int($rewind_to) && $rewind_to < $t) {
-                    if ($rewind_to < 0) $rewind_to = 0;
-                    while ($t > $rewind_to) {
-                        $t--;
-                        $prev = $tokens[$t];
+                $rewind_offset = $this->injectors[$i]->getRewindOffset();
+                if (is_int($rewind_offset)) {
+                    for ($j = 0; $j < $rewind_offset; $j++) {
+                        if (empty($zipper->front)) break;
+                        $token = $zipper->prev($token);
                         // indicate that other injectors should not process this token,
                         // but we need to reprocess it
-                        unset($prev->skip[$i]);
-                        $prev->rewind = $i;
-                        if ($prev instanceof HTMLPurifier_Token_Start) array_pop($this->stack);
-                        elseif ($prev instanceof HTMLPurifier_Token_End) $this->stack[] = $prev->start;
+                        unset($token->skip[$i]);
+                        $token->rewind = $i;
+                        if ($token instanceof HTMLPurifier_Token_Start) {
+                            array_pop($this->stack);
+                        } elseif ($token instanceof HTMLPurifier_Token_End) {
+                            $this->stack[] = $token->start;
+                        }
                     }
                 }
                 $i = false;
             }
 
             // handle case of document end
-            if (!isset($tokens[$t])) {
+            if ($token === NULL) {
                 // kill processing if stack is empty
-                if (empty($this->stack)) break;
+                if (empty($this->stack)) {
+                    break;
+                }
 
                 // peek
                 $top_nesting = array_pop($this->stack);
                 $this->stack[] = $top_nesting;
 
-                // send error
+                // send error [TagClosedSuppress]
                 if ($e && !isset($top_nesting->armor['MakeWellFormed_TagClosedError'])) {
                     $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by document end', $top_nesting);
                 }
 
                 // append, don't splice, since this is the end
-                $tokens[] = new HTMLPurifier_Token_End($top_nesting->name);
+                $token = new HTMLPurifier_Token_End($top_nesting->name);
 
                 // punt!
                 $reprocess = true;
                 continue;
             }
 
-            $token = $tokens[$t];
-
-            //echo '<br>'; printTokens($tokens, $t); printTokens($this->stack);
+            //echo '<br>'; printZipper($zipper, $token);//printTokens($this->stack);
             //flush();
 
             // quick-check: if it's not a tag, no need to process
             if (empty($token->is_tag)) {
                 if ($token instanceof HTMLPurifier_Token_Text) {
                     foreach ($this->injectors as $i => $injector) {
-                        if (isset($token->skip[$i])) continue;
-                        if ($token->rewind !== null && $token->rewind !== $i) continue;
-                        $injector->handleText($token);
-                        $this->processToken($token, $i);
+                        if (isset($token->skip[$i])) {
+                            continue;
+                        }
+                        if ($token->rewind !== null && $token->rewind !== $i) {
+                            continue;
+                        }
+                        // XXX fuckup
+                        $r = $token;
+                        $injector->handleText($r);
+                        $token = $this->processToken($r, $i);
                         $reprocess = true;
                         break;
                     }
@@ -193,12 +237,22 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             $ok = false;
             if ($type === 'empty' && $token instanceof HTMLPurifier_Token_Start) {
                 // claims to be a start tag but is empty
-                $token = new HTMLPurifier_Token_Empty($token->name, $token->attr);
+                $token = new HTMLPurifier_Token_Empty(
+                    $token->name,
+                    $token->attr,
+                    $token->line,
+                    $token->col,
+                    $token->armor
+                );
                 $ok = true;
             } elseif ($type && $type !== 'empty' && $token instanceof HTMLPurifier_Token_Empty) {
                 // claims to be empty but really is a start tag
-                $this->swap(new HTMLPurifier_Token_End($token->name));
-                $this->insertBefore(new HTMLPurifier_Token_Start($token->name, $token->attr));
+                // NB: this assignment is required
+                $old_token = $token;
+                $token = new HTMLPurifier_Token_End($token->name);
+                $token = $this->insertBefore(
+                    new HTMLPurifier_Token_Start($old_token->name, $old_token->attr, $old_token->line, $old_token->col, $old_token->armor)
+                );
                 // punt (since we had to modify the input stream in a non-trivial way)
                 $reprocess = true;
                 continue;
@@ -211,56 +265,97 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
                 // ...unless they also have to close their parent
                 if (!empty($this->stack)) {
 
+                    // Performance note: you might think that it's rather
+                    // inefficient, recalculating the autoclose information
+                    // for every tag that a token closes (since when we
+                    // do an autoclose, we push a new token into the
+                    // stream and then /process/ that, before
+                    // re-processing this token.)  But this is
+                    // necessary, because an injector can make an
+                    // arbitrary transformations to the autoclosing
+                    // tokens we introduce, so things may have changed
+                    // in the meantime.  Also, doing the inefficient thing is
+                    // "easy" to reason about (for certain perverse definitions
+                    // of "easy")
+
                     $parent = array_pop($this->stack);
                     $this->stack[] = $parent;
 
+                    $parent_def = null;
+                    $parent_elements = null;
+                    $autoclose = false;
                     if (isset($definition->info[$parent->name])) {
-                        $elements = $definition->info[$parent->name]->child->getAllowedElements($config);
-                        $autoclose = !isset($elements[$token->name]);
-                    } else {
-                        $autoclose = false;
+                        $parent_def = $definition->info[$parent->name];
+                        $parent_elements = $parent_def->child->getAllowedElements($config);
+                        $autoclose = !isset($parent_elements[$token->name]);
                     }
 
                     if ($autoclose && $definition->info[$token->name]->wrap) {
-                        // Check if an element can be wrapped by another 
-                        // element to make it valid in a context (for 
+                        // Check if an element can be wrapped by another
+                        // element to make it valid in a context (for
                         // example, <ul><ul> needs a <li> in between)
                         $wrapname = $definition->info[$token->name]->wrap;
                         $wrapdef = $definition->info[$wrapname];
                         $elements = $wrapdef->child->getAllowedElements($config);
-                        $parent_elements = $definition->info[$parent->name]->child->getAllowedElements($config);
                         if (isset($elements[$token->name]) && isset($parent_elements[$wrapname])) {
                             $newtoken = new HTMLPurifier_Token_Start($wrapname);
-                            $this->insertBefore($newtoken);
+                            $token = $this->insertBefore($newtoken);
                             $reprocess = true;
                             continue;
                         }
                     }
 
                     $carryover = false;
-                    if ($autoclose && $definition->info[$parent->name]->formatting) {
+                    if ($autoclose && $parent_def->formatting) {
                         $carryover = true;
                     }
 
                     if ($autoclose) {
-                        // errors need to be updated
-                        $new_token = new HTMLPurifier_Token_End($parent->name);
-                        $new_token->start = $parent;
-                        if ($carryover) {
-                            $element = clone $parent;
-                            $element->armor['MakeWellFormed_TagClosedError'] = true;
-                            $element->carryover = true;
-                            $this->processToken(array($new_token, $token, $element));
-                        } else {
-                            $this->insertBefore($new_token);
-                        }
-                        if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
-                            if (!$carryover) {
-                                $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
-                            } else {
-                                $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
+                        // check if this autoclose is doomed to fail
+                        // (this rechecks $parent, which his harmless)
+                        $autoclose_ok = isset($global_parent_allowed_elements[$token->name]);
+                        if (!$autoclose_ok) {
+                            foreach ($this->stack as $ancestor) {
+                                $elements = $definition->info[$ancestor->name]->child->getAllowedElements($config);
+                                if (isset($elements[$token->name])) {
+                                    $autoclose_ok = true;
+                                    break;
+                                }
+                                if ($definition->info[$token->name]->wrap) {
+                                    $wrapname = $definition->info[$token->name]->wrap;
+                                    $wrapdef = $definition->info[$wrapname];
+                                    $wrap_elements = $wrapdef->child->getAllowedElements($config);
+                                    if (isset($wrap_elements[$token->name]) && isset($elements[$wrapname])) {
+                                        $autoclose_ok = true;
+                                        break;
+                                    }
+                                }
                             }
                         }
+                        if ($autoclose_ok) {
+                            // errors need to be updated
+                            $new_token = new HTMLPurifier_Token_End($parent->name);
+                            $new_token->start = $parent;
+                            // [TagClosedSuppress]
+                            if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
+                                if (!$carryover) {
+                                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
+                                } else {
+                                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
+                                }
+                            }
+                            if ($carryover) {
+                                $element = clone $parent;
+                                // [TagClosedAuto]
+                                $element->armor['MakeWellFormed_TagClosedError'] = true;
+                                $element->carryover = true;
+                                $token = $this->processToken(array($new_token, $token, $element));
+                            } else {
+                                $token = $this->insertBefore($new_token);
+                            }
+                        } else {
+                            $token = $this->remove();
+                        }
                         $reprocess = true;
                         continue;
                     }
@@ -271,20 +366,26 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
 
             if ($ok) {
                 foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) continue;
-                    if ($token->rewind !== null && $token->rewind !== $i) continue;
-                    $injector->handleElement($token);
-                    $this->processToken($token, $i);
+                    if (isset($token->skip[$i])) {
+                        continue;
+                    }
+                    if ($token->rewind !== null && $token->rewind !== $i) {
+                        continue;
+                    }
+                    $r = $token;
+                    $injector->handleElement($r);
+                    $token = $this->processToken($r, $i);
                     $reprocess = true;
                     break;
                 }
                 if (!$reprocess) {
                     // ah, nothing interesting happened; do normal processing
-                    $this->swap($token);
                     if ($token instanceof HTMLPurifier_Token_Start) {
                         $this->stack[] = $token;
                     } elseif ($token instanceof HTMLPurifier_Token_End) {
-                        throw new HTMLPurifier_Exception('Improper handling of end tag in start code; possible error in MakeWellFormed');
+                        throw new HTMLPurifier_Exception(
+                            'Improper handling of end tag in start code; possible error in MakeWellFormed'
+                        );
                     }
                 }
                 continue;
@@ -298,13 +399,15 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             // make sure that we have something open
             if (empty($this->stack)) {
                 if ($escape_invalid_tags) {
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
-                    $this->swap(new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    ));
+                    if ($e) {
+                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
+                    }
+                    $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
                 } else {
-                    $this->remove();
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
+                    if ($e) {
+                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
+                    }
+                    $token = $this->remove();
                 }
                 $reprocess = true;
                 continue;
@@ -318,10 +421,15 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             if ($current_parent->name == $token->name) {
                 $token->start = $current_parent;
                 foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) continue;
-                    if ($token->rewind !== null && $token->rewind !== $i) continue;
-                    $injector->handleEnd($token);
-                    $this->processToken($token, $i);
+                    if (isset($token->skip[$i])) {
+                        continue;
+                    }
+                    if ($token->rewind !== null && $token->rewind !== $i) {
+                        continue;
+                    }
+                    $r = $token;
+                    $injector->handleEnd($r);
+                    $token = $this->processToken($r, $i);
                     $this->stack[] = $current_parent;
                     $reprocess = true;
                     break;
@@ -349,13 +457,15 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             // we didn't find the tag, so remove
             if ($skipped_tags === false) {
                 if ($escape_invalid_tags) {
-                    $this->swap(new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    ));
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
+                    if ($e) {
+                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
+                    }
+                    $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
                 } else {
-                    $this->remove();
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
+                    if ($e) {
+                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
+                    }
+                    $token = $this->remove();
                 }
                 $reprocess = true;
                 continue;
@@ -366,7 +476,7 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             if ($e) {
                 for ($j = $c - 1; $j > 0; $j--) {
                     // notice we exclude $j == 0, i.e. the current ending tag, from
-                    // the errors...
+                    // the errors... [TagClosedSuppress]
                     if (!isset($skipped_tags[$j]->armor['MakeWellFormed_TagClosedError'])) {
                         $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by element end', $skipped_tags[$j]);
                     }
@@ -381,24 +491,24 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
                 $new_token->start = $skipped_tags[$j];
                 array_unshift($replace, $new_token);
                 if (isset($definition->info[$new_token->name]) && $definition->info[$new_token->name]->formatting) {
+                    // [TagClosedAuto]
                     $element = clone $skipped_tags[$j];
                     $element->carryover = true;
                     $element->armor['MakeWellFormed_TagClosedError'] = true;
                     $replace[] = $element;
                 }
             }
-            $this->processToken($replace);
+            $token = $this->processToken($replace);
             $reprocess = true;
             continue;
         }
 
-        $context->destroy('CurrentNesting');
-        $context->destroy('InputTokens');
-        $context->destroy('InputIndex');
         $context->destroy('CurrentToken');
+        $context->destroy('CurrentNesting');
+        $context->destroy('InputZipper');
 
-        unset($this->injectors, $this->stack, $this->tokens, $this->t);
-        return $tokens;
+        unset($this->injectors, $this->stack, $this->tokens);
+        return $zipper->toArray($token);
     }
 
     /**
@@ -417,25 +527,38 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
      * If $token is an integer, that number of tokens (with the first token
      * being the current one) will be deleted.
      *
-     * @param $token Token substitution value
-     * @param $injector Injector that performed the substitution; default is if
+     * @param HTMLPurifier_Token|array|int|bool $token Token substitution value
+     * @param HTMLPurifier_Injector|int $injector Injector that performed the substitution; default is if
      *        this is not an injector related operation.
+     * @throws HTMLPurifier_Exception
      */
-    protected function processToken($token, $injector = -1) {
-
+    protected function processToken($token, $injector = -1)
+    {
         // normalize forms of token
-        if (is_object($token)) $token = array(1, $token);
-        if (is_int($token))    $token = array($token);
-        if ($token === false)  $token = array(1);
-        if (!is_array($token)) throw new HTMLPurifier_Exception('Invalid token type from injector');
-        if (!is_int($token[0])) array_unshift($token, 1);
-        if ($token[0] === 0) throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
+        if (is_object($token)) {
+            $token = array(1, $token);
+        }
+        if (is_int($token)) {
+            $token = array($token);
+        }
+        if ($token === false) {
+            $token = array(1);
+        }
+        if (!is_array($token)) {
+            throw new HTMLPurifier_Exception('Invalid token type from injector');
+        }
+        if (!is_int($token[0])) {
+            array_unshift($token, 1);
+        }
+        if ($token[0] === 0) {
+            throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
+        }
 
         // $token is now an array with the following form:
         // array(number nodes to delete, new node 1, new node 2, ...)
 
         $delete = array_shift($token);
-        $old = array_splice($this->tokens, $this->t, $delete, $token);
+        list($old, $r) = $this->zipper->splice($this->token, $delete, $token);
 
         if ($injector > -1) {
             // determine appropriate skips
@@ -446,30 +569,32 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
             }
         }
 
+        return $r;
+
     }
 
     /**
-     * Inserts a token before the current token. Cursor now points to this token
+     * Inserts a token before the current token. Cursor now points to
+     * this token.  You must reprocess after this.
+     * @param HTMLPurifier_Token $token
      */
-    private function insertBefore($token) {
-        array_splice($this->tokens, $this->t, 0, array($token));
+    private function insertBefore($token)
+    {
+        // NB not $this->zipper->insertBefore(), due to positioning
+        // differences
+        $splice = $this->zipper->splice($this->token, 0, array($token));
+
+        return $splice[1];
     }
 
     /**
      * Removes current token. Cursor now points to new token occupying previously
-     * occupied space.
+     * occupied space.  You must reprocess after this.
      */
-    private function remove() {
-        array_splice($this->tokens, $this->t, 1);
+    private function remove()
+    {
+        return $this->zipper->delete();
     }
-
-    /**
-     * Swap current token with new token. Cursor points to new token (no change).
-     */
-    private function swap($token) {
-        $this->tokens[$this->t] = $token;
-    }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/RemoveForeignElements.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/RemoveForeignElements.php
similarity index 64%
rename from library/HTMLPurifier/Strategy/RemoveForeignElements.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/RemoveForeignElements.php
index cf3a33e406..1a8149eccb 100644
--- a/library/HTMLPurifier/Strategy/RemoveForeignElements.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/RemoveForeignElements.php
@@ -11,19 +11,29 @@
 class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
 {
 
-    public function execute($tokens, $config, $context) {
+    /**
+     * @param HTMLPurifier_Token[] $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array|HTMLPurifier_Token[]
+     */
+    public function execute($tokens, $config, $context)
+    {
         $definition = $config->getHTMLDefinition();
         $generator = new HTMLPurifier_Generator($config, $context);
         $result = array();
 
         $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
-        $remove_invalid_img  = $config->get('Core.RemoveInvalidImg');
+        $remove_invalid_img = $config->get('Core.RemoveInvalidImg');
 
         // currently only used to determine if comments should be kept
         $trusted = $config->get('HTML.Trusted');
+        $comment_lookup = $config->get('HTML.AllowedComments');
+        $comment_regexp = $config->get('HTML.AllowedCommentsRegexp');
+        $check_comments = $comment_lookup !== array() || $comment_regexp !== null;
 
         $remove_script_contents = $config->get('Core.RemoveScriptContents');
-        $hidden_elements     = $config->get('Core.HiddenElements');
+        $hidden_elements = $config->get('Core.HiddenElements');
 
         // remove script contents compatibility
         if ($remove_script_contents === true) {
@@ -48,34 +58,31 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
             $e =& $context->get('ErrorCollector');
         }
 
-        foreach($tokens as $token) {
+        foreach ($tokens as $token) {
             if ($remove_until) {
                 if (empty($token->is_tag) || $token->name !== $remove_until) {
                     continue;
                 }
             }
-            if (!empty( $token->is_tag )) {
+            if (!empty($token->is_tag)) {
                 // DEFINITION CALL
 
                 // before any processing, try to transform the element
-                if (
-                    isset($definition->info_tag_transform[$token->name])
-                ) {
+                if (isset($definition->info_tag_transform[$token->name])) {
                     $original_name = $token->name;
                     // there is a transformation for this tag
                     // DEFINITION CALL
                     $token = $definition->
-                                info_tag_transform[$token->name]->
-                                    transform($token, $config, $context);
-                    if ($e) $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
+                        info_tag_transform[$token->name]->transform($token, $config, $context);
+                    if ($e) {
+                        $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
+                    }
                 }
 
                 if (isset($definition->info[$token->name])) {
-
                     // mostly everything's good, but
                     // we need to make sure required attributes are in order
-                    if (
-                        ($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) &&
+                    if (($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) &&
                         $definition->info[$token->name]->required_attr &&
                         ($token->name != 'img' || $remove_invalid_img) // ensure config option still works
                     ) {
@@ -88,7 +95,13 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
                             }
                         }
                         if (!$ok) {
-                            if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', $name);
+                            if ($e) {
+                                $e->send(
+                                    E_ERROR,
+                                    'Strategy_RemoveForeignElements: Missing required attribute',
+                                    $name
+                                );
+                            }
                             continue;
                         }
                         $token->armor['ValidateAttributes'] = true;
@@ -102,7 +115,9 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
 
                 } elseif ($escape_invalid_tags) {
                     // invalid tag, generate HTML representation and insert in
-                    if ($e) $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
+                    if ($e) {
+                        $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
+                    }
                     $token = new HTMLPurifier_Token_Text(
                         $generator->generateFromToken($token)
                     );
@@ -117,9 +132,13 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
                         } else {
                             $remove_until = false;
                         }
-                        if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
+                        if ($e) {
+                            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
+                        }
                     } else {
-                        if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
+                        if ($e) {
+                            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
+                        }
                     }
                     continue;
                 }
@@ -128,26 +147,46 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
                 if ($textify_comments !== false) {
                     $data = $token->data;
                     $token = new HTMLPurifier_Token_Text($data);
-                } elseif ($trusted) {
-                    // keep, but perform comment cleaning
+                } elseif ($trusted || $check_comments) {
+                    // always cleanup comments
+                    $trailing_hyphen = false;
                     if ($e) {
                         // perform check whether or not there's a trailing hyphen
                         if (substr($token->data, -1) == '-') {
-                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Trailing hyphen in comment removed');
+                            $trailing_hyphen = true;
                         }
                     }
                     $token->data = rtrim($token->data, '-');
                     $found_double_hyphen = false;
                     while (strpos($token->data, '--') !== false) {
-                        if ($e && !$found_double_hyphen) {
-                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Hyphens in comment collapsed');
-                        }
-                        $found_double_hyphen = true; // prevent double-erroring
+                        $found_double_hyphen = true;
                         $token->data = str_replace('--', '-', $token->data);
                     }
+                    if ($trusted || !empty($comment_lookup[trim($token->data)]) ||
+                        ($comment_regexp !== null && preg_match($comment_regexp, trim($token->data)))) {
+                        // OK good
+                        if ($e) {
+                            if ($trailing_hyphen) {
+                                $e->send(
+                                    E_NOTICE,
+                                    'Strategy_RemoveForeignElements: Trailing hyphen in comment removed'
+                                );
+                            }
+                            if ($found_double_hyphen) {
+                                $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Hyphens in comment collapsed');
+                            }
+                        }
+                    } else {
+                        if ($e) {
+                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
+                        }
+                        continue;
+                    }
                 } else {
                     // strip comments
-                    if ($e) $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
+                    if ($e) {
+                        $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
+                    }
                     continue;
                 }
             } elseif ($token instanceof HTMLPurifier_Token_Text) {
@@ -160,12 +199,9 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
             // we removed tokens until the end, throw error
             $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', $remove_until);
         }
-
         $context->destroy('CurrentToken');
-
         return $result;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/ValidateAttributes.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/ValidateAttributes.php
similarity index 65%
rename from library/HTMLPurifier/Strategy/ValidateAttributes.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/ValidateAttributes.php
index c3328a9d44..fbb3d27c81 100644
--- a/library/HTMLPurifier/Strategy/ValidateAttributes.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Strategy/ValidateAttributes.php
@@ -7,8 +7,14 @@
 class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
 {
 
-    public function execute($tokens, $config, $context) {
-
+    /**
+     * @param HTMLPurifier_Token[] $tokens
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token[]
+     */
+    public function execute($tokens, $config, $context)
+    {
         // setup validator
         $validator = new HTMLPurifier_AttrValidator();
 
@@ -19,21 +25,21 @@ class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
 
             // only process tokens that have attributes,
             //   namely start and empty tags
-            if (!$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty) continue;
+            if (!$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty) {
+                continue;
+            }
 
             // skip tokens that are armored
-            if (!empty($token->armor['ValidateAttributes'])) continue;
+            if (!empty($token->armor['ValidateAttributes'])) {
+                continue;
+            }
 
             // note that we have no facilities here for removing tokens
             $validator->validateToken($token, $config, $context);
-
-            $tokens[$key] = $token; // for PHP 4
         }
         $context->destroy('CurrentToken');
-
         return $tokens;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/StringHash.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/StringHash.php
similarity index 75%
rename from library/HTMLPurifier/StringHash.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/StringHash.php
index 62085c5c2f..c07370197a 100644
--- a/library/HTMLPurifier/StringHash.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/StringHash.php
@@ -10,28 +10,36 @@
  */
 class HTMLPurifier_StringHash extends ArrayObject
 {
+    /**
+     * @type array
+     */
     protected $accessed = array();
 
     /**
      * Retrieves a value, and logs the access.
+     * @param mixed $index
+     * @return mixed
      */
-    public function offsetGet($index) {
+    public function offsetGet($index)
+    {
         $this->accessed[$index] = true;
         return parent::offsetGet($index);
     }
 
     /**
      * Returns a lookup array of all array indexes that have been accessed.
-     * @return Array in form array($index => true).
+     * @return array in form array($index => true).
      */
-    public function getAccessed() {
+    public function getAccessed()
+    {
         return $this->accessed;
     }
 
     /**
      * Resets the access array.
      */
-    public function resetAccessed() {
+    public function resetAccessed()
+    {
         $this->accessed = array();
     }
 }
diff --git a/library/HTMLPurifier/StringHashParser.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/StringHashParser.php
similarity index 73%
rename from library/HTMLPurifier/StringHashParser.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/StringHashParser.php
index f3e70c712f..7c73f80835 100644
--- a/library/HTMLPurifier/StringHashParser.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/StringHashParser.php
@@ -28,15 +28,25 @@
 class HTMLPurifier_StringHashParser
 {
 
+    /**
+     * @type string
+     */
     public $default = 'ID';
 
     /**
      * Parses a file that contains a single string-hash.
+     * @param string $file
+     * @return array
      */
-    public function parseFile($file) {
-        if (!file_exists($file)) return false;
+    public function parseFile($file)
+    {
+        if (!file_exists($file)) {
+            return false;
+        }
         $fh = fopen($file, 'r');
-        if (!$fh) return false;
+        if (!$fh) {
+            return false;
+        }
         $ret = $this->parseHandle($fh);
         fclose($fh);
         return $ret;
@@ -44,12 +54,19 @@ class HTMLPurifier_StringHashParser
 
     /**
      * Parses a file that contains multiple string-hashes delimited by '----'
+     * @param string $file
+     * @return array
      */
-    public function parseMultiFile($file) {
-        if (!file_exists($file)) return false;
+    public function parseMultiFile($file)
+    {
+        if (!file_exists($file)) {
+            return false;
+        }
         $ret = array();
         $fh = fopen($file, 'r');
-        if (!$fh) return false;
+        if (!$fh) {
+            return false;
+        }
         while (!feof($fh)) {
             $ret[] = $this->parseHandle($fh);
         }
@@ -62,26 +79,36 @@ class HTMLPurifier_StringHashParser
      * @note While it's possible to simulate in-memory parsing by using
      *       custom stream wrappers, if such a use-case arises we should
      *       factor out the file handle into its own class.
-     * @param $fh File handle with pointer at start of valid string-hash
+     * @param resource $fh File handle with pointer at start of valid string-hash
      *            block.
+     * @return array
      */
-    protected function parseHandle($fh) {
+    protected function parseHandle($fh)
+    {
         $state   = false;
         $single  = false;
         $ret     = array();
         do {
             $line = fgets($fh);
-            if ($line === false) break;
+            if ($line === false) {
+                break;
+            }
             $line = rtrim($line, "\n\r");
-            if (!$state && $line === '') continue;
-            if ($line === '----') break;
+            if (!$state && $line === '') {
+                continue;
+            }
+            if ($line === '----') {
+                break;
+            }
             if (strncmp('--#', $line, 3) === 0) {
                 // Comment
                 continue;
             } elseif (strncmp('--', $line, 2) === 0) {
                 // Multiline declaration
                 $state = trim($line, '- ');
-                if (!isset($ret[$state])) $ret[$state] = '';
+                if (!isset($ret[$state])) {
+                    $ret[$state] = '';
+                }
                 continue;
             } elseif (!$state) {
                 $single = true;
@@ -104,7 +131,6 @@ class HTMLPurifier_StringHashParser
         } while (!feof($fh));
         return $ret;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/TagTransform.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform.php
similarity index 62%
rename from library/HTMLPurifier/TagTransform.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform.php
index 210a447217..7b8d833433 100644
--- a/library/HTMLPurifier/TagTransform.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform.php
@@ -8,14 +8,15 @@ abstract class HTMLPurifier_TagTransform
 
     /**
      * Tag name to transform the tag to.
+     * @type string
      */
     public $transform_to;
 
     /**
      * Transforms the obsolete tag into the valid tag.
-     * @param $tag Tag to be transformed.
-     * @param $config Mandatory HTMLPurifier_Config object
-     * @param $context Mandatory HTMLPurifier_Context object
+     * @param HTMLPurifier_Token_Tag $tag Tag to be transformed.
+     * @param HTMLPurifier_Config $config Mandatory HTMLPurifier_Config object
+     * @param HTMLPurifier_Context $context Mandatory HTMLPurifier_Context object
      */
     abstract public function transform($tag, $config, $context);
 
@@ -23,14 +24,14 @@ abstract class HTMLPurifier_TagTransform
      * Prepends CSS properties to the style attribute, creating the
      * attribute if it doesn't exist.
      * @warning Copied over from AttrTransform, be sure to keep in sync
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $css CSS to prepend
+     * @param array $attr Attribute array to process (passed by reference)
+     * @param string $css CSS to prepend
      */
-    protected function prependCSS(&$attr, $css) {
+    protected function prependCSS(&$attr, $css)
+    {
         $attr['style'] = isset($attr['style']) ? $attr['style'] : '';
         $attr['style'] = $css . $attr['style'];
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/TagTransform/Font.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Font.php
similarity index 71%
rename from library/HTMLPurifier/TagTransform/Font.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Font.php
index ed2463786d..7853d90bc6 100644
--- a/library/HTMLPurifier/TagTransform/Font.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Font.php
@@ -17,9 +17,14 @@
  */
 class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
 {
-
+    /**
+     * @type string
+     */
     public $transform_to = 'span';
 
+    /**
+     * @type array
+     */
     protected $_size_lookup = array(
         '0' => 'xx-small',
         '1' => 'xx-small',
@@ -37,8 +42,14 @@ class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
         '+4' => '300%'
     );
 
-    public function transform($tag, $config, $context) {
-
+    /**
+     * @param HTMLPurifier_Token_Tag $tag
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_Token_End|string
+     */
+    public function transform($tag, $config, $context)
+    {
         if ($tag instanceof HTMLPurifier_Token_End) {
             $new_tag = clone $tag;
             $new_tag->name = $this->transform_to;
@@ -63,17 +74,25 @@ class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
         // handle size transform
         if (isset($attr['size'])) {
             // normalize large numbers
-            if ($attr['size']{0} == '+' || $attr['size']{0} == '-') {
-                $size = (int) $attr['size'];
-                if ($size < -2) $attr['size'] = '-2';
-                if ($size > 4)  $attr['size'] = '+4';
-            } else {
-                $size = (int) $attr['size'];
-                if ($size > 7) $attr['size'] = '7';
+            if ($attr['size'] !== '') {
+                if ($attr['size']{0} == '+' || $attr['size']{0} == '-') {
+                    $size = (int)$attr['size'];
+                    if ($size < -2) {
+                        $attr['size'] = '-2';
+                    }
+                    if ($size > 4) {
+                        $attr['size'] = '+4';
+                    }
+                } else {
+                    $size = (int)$attr['size'];
+                    if ($size > 7) {
+                        $attr['size'] = '7';
+                    }
+                }
             }
             if (isset($this->_size_lookup[$attr['size']])) {
                 $prepend_style .= 'font-size:' .
-                  $this->_size_lookup[$attr['size']] . ';';
+                    $this->_size_lookup[$attr['size']] . ';';
             }
             unset($attr['size']);
         }
@@ -89,7 +108,6 @@ class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
         $new_tag->attr = $attr;
 
         return $new_tag;
-
     }
 }
 
diff --git a/library/HTMLPurifier/TagTransform/Simple.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Simple.php
similarity index 61%
rename from library/HTMLPurifier/TagTransform/Simple.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Simple.php
index 0e36130f25..71bf10b91f 100644
--- a/library/HTMLPurifier/TagTransform/Simple.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/TagTransform/Simple.php
@@ -7,19 +7,29 @@
  */
 class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
 {
-
+    /**
+     * @type string
+     */
     protected $style;
 
     /**
-     * @param $transform_to Tag name to transform to.
-     * @param $style CSS style to add to the tag
+     * @param string $transform_to Tag name to transform to.
+     * @param string $style CSS style to add to the tag
      */
-    public function __construct($transform_to, $style = null) {
+    public function __construct($transform_to, $style = null)
+    {
         $this->transform_to = $transform_to;
         $this->style = $style;
     }
 
-    public function transform($tag, $config, $context) {
+    /**
+     * @param HTMLPurifier_Token_Tag $tag
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return string
+     */
+    public function transform($tag, $config, $context)
+    {
         $new_tag = clone $tag;
         $new_tag->name = $this->transform_to;
         if (!is_null($this->style) &&
@@ -29,7 +39,6 @@ class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
         }
         return $new_tag;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Token.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token.php
new file mode 100644
index 0000000000..85b85e072d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token.php
@@ -0,0 +1,100 @@
+<?php
+
+/**
+ * Abstract base token class that all others inherit from.
+ */
+abstract class HTMLPurifier_Token
+{
+    /**
+     * Line number node was on in source document. Null if unknown.
+     * @type int
+     */
+    public $line;
+
+    /**
+     * Column of line node was on in source document. Null if unknown.
+     * @type int
+     */
+    public $col;
+
+    /**
+     * Lookup array of processing that this token is exempt from.
+     * Currently, valid values are "ValidateAttributes" and
+     * "MakeWellFormed_TagClosedError"
+     * @type array
+     */
+    public $armor = array();
+
+    /**
+     * Used during MakeWellFormed.
+     * @type
+     */
+    public $skip;
+
+    /**
+     * @type
+     */
+    public $rewind;
+
+    /**
+     * @type
+     */
+    public $carryover;
+
+    /**
+     * @param string $n
+     * @return null|string
+     */
+    public function __get($n)
+    {
+        if ($n === 'type') {
+            trigger_error('Deprecated type property called; use instanceof', E_USER_NOTICE);
+            switch (get_class($this)) {
+                case 'HTMLPurifier_Token_Start':
+                    return 'start';
+                case 'HTMLPurifier_Token_Empty':
+                    return 'empty';
+                case 'HTMLPurifier_Token_End':
+                    return 'end';
+                case 'HTMLPurifier_Token_Text':
+                    return 'text';
+                case 'HTMLPurifier_Token_Comment':
+                    return 'comment';
+                default:
+                    return null;
+            }
+        }
+    }
+
+    /**
+     * Sets the position of the token in the source document.
+     * @param int $l
+     * @param int $c
+     */
+    public function position($l = null, $c = null)
+    {
+        $this->line = $l;
+        $this->col = $c;
+    }
+
+    /**
+     * Convenience function for DirectLex settings line/col position.
+     * @param int $l
+     * @param int $c
+     */
+    public function rawPosition($l, $c)
+    {
+        if ($c === -1) {
+            $l++;
+        }
+        $this->line = $l;
+        $this->col = $c;
+    }
+
+    /**
+     * Converts a token into its corresponding node.
+     */
+    abstract public function toNode();
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Comment.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Comment.php
new file mode 100644
index 0000000000..23453c7052
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Comment.php
@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * Concrete comment token class. Generally will be ignored.
+ */
+class HTMLPurifier_Token_Comment extends HTMLPurifier_Token
+{
+    /**
+     * Character data within comment.
+     * @type string
+     */
+    public $data;
+
+    /**
+     * @type bool
+     */
+    public $is_whitespace = true;
+
+    /**
+     * Transparent constructor.
+     *
+     * @param string $data String comment data.
+     * @param int $line
+     * @param int $col
+     */
+    public function __construct($data, $line = null, $col = null)
+    {
+        $this->data = $data;
+        $this->line = $line;
+        $this->col = $col;
+    }
+
+    public function toNode() {
+        return new HTMLPurifier_Node_Comment($this->data, $this->line, $this->col);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token/Empty.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Empty.php
similarity index 54%
rename from library/HTMLPurifier/Token/Empty.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Empty.php
index 2a82b47ad1..78a95f5555 100644
--- a/library/HTMLPurifier/Token/Empty.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Empty.php
@@ -5,7 +5,11 @@
  */
 class HTMLPurifier_Token_Empty extends HTMLPurifier_Token_Tag
 {
-
+    public function toNode() {
+        $n = parent::toNode();
+        $n->empty = true;
+        return $n;
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token/End.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/End.php
similarity index 58%
rename from library/HTMLPurifier/Token/End.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Token/End.php
index 353e79daf7..59b38fdc57 100644
--- a/library/HTMLPurifier/Token/End.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/End.php
@@ -10,10 +10,15 @@
 class HTMLPurifier_Token_End extends HTMLPurifier_Token_Tag
 {
     /**
-     * Token that started this node. Added by MakeWellFormed. Please
-     * do not edit this!
+     * Token that started this node.
+     * Added by MakeWellFormed. Please do not edit this!
+     * @type HTMLPurifier_Token
      */
     public $start;
+
+    public function toNode() {
+        throw new Exception("HTMLPurifier_Token_End->toNode not supported!");
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token/Start.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Start.php
similarity index 99%
rename from library/HTMLPurifier/Token/Start.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Start.php
index e0e14fc624..019f317ada 100644
--- a/library/HTMLPurifier/Token/Start.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Start.php
@@ -5,7 +5,6 @@
  */
 class HTMLPurifier_Token_Start extends HTMLPurifier_Token_Tag
 {
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Token/Tag.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Tag.php
similarity index 72%
rename from library/HTMLPurifier/Token/Tag.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Tag.php
index 798be028ee..d643fa64e2 100644
--- a/library/HTMLPurifier/Token/Tag.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Tag.php
@@ -3,13 +3,14 @@
 /**
  * Abstract class of a tag token (start, end or empty), and its behavior.
  */
-class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
+abstract class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
 {
     /**
      * Static bool marker that indicates the class is a tag.
      *
      * This allows us to check objects with <tt>!empty($obj->is_tag)</tt>
      * without having to use a function call <tt>is_a()</tt>.
+     * @type bool
      */
     public $is_tag = true;
 
@@ -19,21 +20,27 @@ class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
      * @note Strictly speaking, XML tags are case sensitive, so we shouldn't
      * be lower-casing them, but these tokens cater to HTML tags, which are
      * insensitive.
+     * @type string
      */
     public $name;
 
     /**
      * Associative array of the tag's attributes.
+     * @type array
      */
     public $attr = array();
 
     /**
      * Non-overloaded constructor, which lower-cases passed tag name.
      *
-     * @param $name String name.
-     * @param $attr Associative array of attributes.
+     * @param string $name String name.
+     * @param array $attr Associative array of attributes.
+     * @param int $line
+     * @param int $col
+     * @param array $armor
      */
-    public function __construct($name, $attr = array(), $line = null, $col = null) {
+    public function __construct($name, $attr = array(), $line = null, $col = null, $armor = array())
+    {
         $this->name = ctype_lower($name) ? $name : strtolower($name);
         foreach ($attr as $key => $value) {
             // normalization only necessary when key is not lowercase
@@ -49,7 +56,12 @@ class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
         }
         $this->attr = $attr;
         $this->line = $line;
-        $this->col  = $col;
+        $this->col = $col;
+        $this->armor = $armor;
+    }
+
+    public function toNode() {
+        return new HTMLPurifier_Node_Element($this->name, $this->attr, $this->line, $this->col, $this->armor);
     }
 }
 
diff --git a/library/HTMLPurifier/Token/Text.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Text.php
similarity index 54%
rename from library/HTMLPurifier/Token/Text.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Text.php
index 82efd823d6..f26a1c211b 100644
--- a/library/HTMLPurifier/Token/Text.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Token/Text.php
@@ -12,22 +12,42 @@
 class HTMLPurifier_Token_Text extends HTMLPurifier_Token
 {
 
-    public $name = '#PCDATA'; /**< PCDATA tag name compatible with DTD. */
-    public $data; /**< Parsed character data of text. */
-    public $is_whitespace; /**< Bool indicating if node is whitespace. */
+    /**
+     * @type string
+     */
+    public $name = '#PCDATA';
+    /**< PCDATA tag name compatible with DTD. */
+
+    /**
+     * @type string
+     */
+    public $data;
+    /**< Parsed character data of text. */
+
+    /**
+     * @type bool
+     */
+    public $is_whitespace;
+
+    /**< Bool indicating if node is whitespace. */
 
     /**
      * Constructor, accepts data and determines if it is whitespace.
-     *
-     * @param $data String parsed character data.
+     * @param string $data String parsed character data.
+     * @param int $line
+     * @param int $col
      */
-    public function __construct($data, $line = null, $col = null) {
+    public function __construct($data, $line = null, $col = null)
+    {
         $this->data = $data;
         $this->is_whitespace = ctype_space($data);
         $this->line = $line;
-        $this->col  = $col;
+        $this->col = $col;
     }
 
+    public function toNode() {
+        return new HTMLPurifier_Node_Text($this->data, $this->is_whitespace, $this->line, $this->col);
+    }
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/TokenFactory.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/TokenFactory.php
new file mode 100644
index 0000000000..dea2446b93
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/TokenFactory.php
@@ -0,0 +1,118 @@
+<?php
+
+/**
+ * Factory for token generation.
+ *
+ * @note Doing some benchmarking indicates that the new operator is much
+ *       slower than the clone operator (even discounting the cost of the
+ *       constructor).  This class is for that optimization.
+ *       Other then that, there's not much point as we don't
+ *       maintain parallel HTMLPurifier_Token hierarchies (the main reason why
+ *       you'd want to use an abstract factory).
+ * @todo Port DirectLex to use this
+ */
+class HTMLPurifier_TokenFactory
+{
+    // p stands for prototype
+
+    /**
+     * @type HTMLPurifier_Token_Start
+     */
+    private $p_start;
+
+    /**
+     * @type HTMLPurifier_Token_End
+     */
+    private $p_end;
+
+    /**
+     * @type HTMLPurifier_Token_Empty
+     */
+    private $p_empty;
+
+    /**
+     * @type HTMLPurifier_Token_Text
+     */
+    private $p_text;
+
+    /**
+     * @type HTMLPurifier_Token_Comment
+     */
+    private $p_comment;
+
+    /**
+     * Generates blank prototypes for cloning.
+     */
+    public function __construct()
+    {
+        $this->p_start = new HTMLPurifier_Token_Start('', array());
+        $this->p_end = new HTMLPurifier_Token_End('');
+        $this->p_empty = new HTMLPurifier_Token_Empty('', array());
+        $this->p_text = new HTMLPurifier_Token_Text('');
+        $this->p_comment = new HTMLPurifier_Token_Comment('');
+    }
+
+    /**
+     * Creates a HTMLPurifier_Token_Start.
+     * @param string $name Tag name
+     * @param array $attr Associative array of attributes
+     * @return HTMLPurifier_Token_Start Generated HTMLPurifier_Token_Start
+     */
+    public function createStart($name, $attr = array())
+    {
+        $p = clone $this->p_start;
+        $p->__construct($name, $attr);
+        return $p;
+    }
+
+    /**
+     * Creates a HTMLPurifier_Token_End.
+     * @param string $name Tag name
+     * @return HTMLPurifier_Token_End Generated HTMLPurifier_Token_End
+     */
+    public function createEnd($name)
+    {
+        $p = clone $this->p_end;
+        $p->__construct($name);
+        return $p;
+    }
+
+    /**
+     * Creates a HTMLPurifier_Token_Empty.
+     * @param string $name Tag name
+     * @param array $attr Associative array of attributes
+     * @return HTMLPurifier_Token_Empty Generated HTMLPurifier_Token_Empty
+     */
+    public function createEmpty($name, $attr = array())
+    {
+        $p = clone $this->p_empty;
+        $p->__construct($name, $attr);
+        return $p;
+    }
+
+    /**
+     * Creates a HTMLPurifier_Token_Text.
+     * @param string $data Data of text token
+     * @return HTMLPurifier_Token_Text Generated HTMLPurifier_Token_Text
+     */
+    public function createText($data)
+    {
+        $p = clone $this->p_text;
+        $p->__construct($data);
+        return $p;
+    }
+
+    /**
+     * Creates a HTMLPurifier_Token_Comment.
+     * @param string $data Data of comment token
+     * @return HTMLPurifier_Token_Comment Generated HTMLPurifier_Token_Comment
+     */
+    public function createComment($data)
+    {
+        $p = clone $this->p_comment;
+        $p->__construct($data);
+        return $p;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URI.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URI.php
new file mode 100644
index 0000000000..a5e7ae2984
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URI.php
@@ -0,0 +1,314 @@
+<?php
+
+/**
+ * HTML Purifier's internal representation of a URI.
+ * @note
+ *      Internal data-structures are completely escaped. If the data needs
+ *      to be used in a non-URI context (which is very unlikely), be sure
+ *      to decode it first. The URI may not necessarily be well-formed until
+ *      validate() is called.
+ */
+class HTMLPurifier_URI
+{
+    /**
+     * @type string
+     */
+    public $scheme;
+
+    /**
+     * @type string
+     */
+    public $userinfo;
+
+    /**
+     * @type string
+     */
+    public $host;
+
+    /**
+     * @type int
+     */
+    public $port;
+
+    /**
+     * @type string
+     */
+    public $path;
+
+    /**
+     * @type string
+     */
+    public $query;
+
+    /**
+     * @type string
+     */
+    public $fragment;
+
+    /**
+     * @param string $scheme
+     * @param string $userinfo
+     * @param string $host
+     * @param int $port
+     * @param string $path
+     * @param string $query
+     * @param string $fragment
+     * @note Automatically normalizes scheme and port
+     */
+    public function __construct($scheme, $userinfo, $host, $port, $path, $query, $fragment)
+    {
+        $this->scheme = is_null($scheme) || ctype_lower($scheme) ? $scheme : strtolower($scheme);
+        $this->userinfo = $userinfo;
+        $this->host = $host;
+        $this->port = is_null($port) ? $port : (int)$port;
+        $this->path = $path;
+        $this->query = $query;
+        $this->fragment = $fragment;
+    }
+
+    /**
+     * Retrieves a scheme object corresponding to the URI's scheme/default
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_URIScheme Scheme object appropriate for validating this URI
+     */
+    public function getSchemeObj($config, $context)
+    {
+        $registry = HTMLPurifier_URISchemeRegistry::instance();
+        if ($this->scheme !== null) {
+            $scheme_obj = $registry->getScheme($this->scheme, $config, $context);
+            if (!$scheme_obj) {
+                return false;
+            } // invalid scheme, clean it out
+        } else {
+            // no scheme: retrieve the default one
+            $def = $config->getDefinition('URI');
+            $scheme_obj = $def->getDefaultScheme($config, $context);
+            if (!$scheme_obj) {
+                // something funky happened to the default scheme object
+                trigger_error(
+                    'Default scheme object "' . $def->defaultScheme . '" was not readable',
+                    E_USER_WARNING
+                );
+                return false;
+            }
+        }
+        return $scheme_obj;
+    }
+
+    /**
+     * Generic validation method applicable for all schemes. May modify
+     * this URI in order to get it into a compliant form.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool True if validation/filtering succeeds, false if failure
+     */
+    public function validate($config, $context)
+    {
+        // ABNF definitions from RFC 3986
+        $chars_sub_delims = '!$&\'()*+,;=';
+        $chars_gen_delims = ':/?#[]@';
+        $chars_pchar = $chars_sub_delims . ':@';
+
+        // validate host
+        if (!is_null($this->host)) {
+            $host_def = new HTMLPurifier_AttrDef_URI_Host();
+            $this->host = $host_def->validate($this->host, $config, $context);
+            if ($this->host === false) {
+                $this->host = null;
+            }
+        }
+
+        // validate scheme
+        // NOTE: It's not appropriate to check whether or not this
+        // scheme is in our registry, since a URIFilter may convert a
+        // URI that we don't allow into one we do.  So instead, we just
+        // check if the scheme can be dropped because there is no host
+        // and it is our default scheme.
+        if (!is_null($this->scheme) && is_null($this->host) || $this->host === '') {
+            // support for relative paths is pretty abysmal when the
+            // scheme is present, so axe it when possible
+            $def = $config->getDefinition('URI');
+            if ($def->defaultScheme === $this->scheme) {
+                $this->scheme = null;
+            }
+        }
+
+        // validate username
+        if (!is_null($this->userinfo)) {
+            $encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . ':');
+            $this->userinfo = $encoder->encode($this->userinfo);
+        }
+
+        // validate port
+        if (!is_null($this->port)) {
+            if ($this->port < 1 || $this->port > 65535) {
+                $this->port = null;
+            }
+        }
+
+        // validate path
+        $segments_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/');
+        if (!is_null($this->host)) { // this catches $this->host === ''
+            // path-abempty (hier and relative)
+            // http://www.example.com/my/path
+            // //www.example.com/my/path (looks odd, but works, and
+            //                            recognized by most browsers)
+            // (this set is valid or invalid on a scheme by scheme
+            // basis, so we'll deal with it later)
+            // file:///my/path
+            // ///my/path
+            $this->path = $segments_encoder->encode($this->path);
+        } elseif ($this->path !== '') {
+            if ($this->path[0] === '/') {
+                // path-absolute (hier and relative)
+                // http:/my/path
+                // /my/path
+                if (strlen($this->path) >= 2 && $this->path[1] === '/') {
+                    // This could happen if both the host gets stripped
+                    // out
+                    // http://my/path
+                    // //my/path
+                    $this->path = '';
+                } else {
+                    $this->path = $segments_encoder->encode($this->path);
+                }
+            } elseif (!is_null($this->scheme)) {
+                // path-rootless (hier)
+                // http:my/path
+                // Short circuit evaluation means we don't need to check nz
+                $this->path = $segments_encoder->encode($this->path);
+            } else {
+                // path-noscheme (relative)
+                // my/path
+                // (once again, not checking nz)
+                $segment_nc_encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . '@');
+                $c = strpos($this->path, '/');
+                if ($c !== false) {
+                    $this->path =
+                        $segment_nc_encoder->encode(substr($this->path, 0, $c)) .
+                        $segments_encoder->encode(substr($this->path, $c));
+                } else {
+                    $this->path = $segment_nc_encoder->encode($this->path);
+                }
+            }
+        } else {
+            // path-empty (hier and relative)
+            $this->path = ''; // just to be safe
+        }
+
+        // qf = query and fragment
+        $qf_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/?');
+
+        if (!is_null($this->query)) {
+            $this->query = $qf_encoder->encode($this->query);
+        }
+
+        if (!is_null($this->fragment)) {
+            $this->fragment = $qf_encoder->encode($this->fragment);
+        }
+        return true;
+    }
+
+    /**
+     * Convert URI back to string
+     * @return string URI appropriate for output
+     */
+    public function toString()
+    {
+        // reconstruct authority
+        $authority = null;
+        // there is a rendering difference between a null authority
+        // (http:foo-bar) and an empty string authority
+        // (http:///foo-bar).
+        if (!is_null($this->host)) {
+            $authority = '';
+            if (!is_null($this->userinfo)) {
+                $authority .= $this->userinfo . '@';
+            }
+            $authority .= $this->host;
+            if (!is_null($this->port)) {
+                $authority .= ':' . $this->port;
+            }
+        }
+
+        // Reconstruct the result
+        // One might wonder about parsing quirks from browsers after
+        // this reconstruction.  Unfortunately, parsing behavior depends
+        // on what *scheme* was employed (file:///foo is handled *very*
+        // differently than http:///foo), so unfortunately we have to
+        // defer to the schemes to do the right thing.
+        $result = '';
+        if (!is_null($this->scheme)) {
+            $result .= $this->scheme . ':';
+        }
+        if (!is_null($authority)) {
+            $result .= '//' . $authority;
+        }
+        $result .= $this->path;
+        if (!is_null($this->query)) {
+            $result .= '?' . $this->query;
+        }
+        if (!is_null($this->fragment)) {
+            $result .= '#' . $this->fragment;
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns true if this URL might be considered a 'local' URL given
+     * the current context.  This is true when the host is null, or
+     * when it matches the host supplied to the configuration.
+     *
+     * Note that this does not do any scheme checking, so it is mostly
+     * only appropriate for metadata that doesn't care about protocol
+     * security.  isBenign is probably what you actually want.
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function isLocal($config, $context)
+    {
+        if ($this->host === null) {
+            return true;
+        }
+        $uri_def = $config->getDefinition('URI');
+        if ($uri_def->host === $this->host) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Returns true if this URL should be considered a 'benign' URL,
+     * that is:
+     *
+     *      - It is a local URL (isLocal), and
+     *      - It has a equal or better level of security
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function isBenign($config, $context)
+    {
+        if (!$this->isLocal($config, $context)) {
+            return false;
+        }
+
+        $scheme_obj = $this->getSchemeObj($config, $context);
+        if (!$scheme_obj) {
+            return false;
+        } // conservative approach
+
+        $current_scheme_obj = $config->getDefinition('URI')->getDefaultScheme($config, $context);
+        if ($current_scheme_obj->secure) {
+            if (!$scheme_obj->secure) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIDefinition.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIDefinition.php
similarity index 70%
rename from library/HTMLPurifier/URIDefinition.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIDefinition.php
index ea2b8fe245..e0bd8bcca8 100644
--- a/library/HTMLPurifier/URIDefinition.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIDefinition.php
@@ -23,19 +23,24 @@ class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
      */
     public $defaultScheme;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternal());
         $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternalResources());
+        $this->registerFilter(new HTMLPurifier_URIFilter_DisableResources());
         $this->registerFilter(new HTMLPurifier_URIFilter_HostBlacklist());
+        $this->registerFilter(new HTMLPurifier_URIFilter_SafeIframe());
         $this->registerFilter(new HTMLPurifier_URIFilter_MakeAbsolute());
         $this->registerFilter(new HTMLPurifier_URIFilter_Munge());
     }
 
-    public function registerFilter($filter) {
+    public function registerFilter($filter)
+    {
         $this->registeredFilters[$filter->name] = $filter;
     }
 
-    public function addFilter($filter, $config) {
+    public function addFilter($filter, $config)
+    {
         $r = $filter->prepare($config);
         if ($r === false) return; // null is ok, for backwards compat
         if ($filter->post) {
@@ -45,22 +50,29 @@ class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
         }
     }
 
-    protected function doSetup($config) {
+    protected function doSetup($config)
+    {
         $this->setupMemberVariables($config);
         $this->setupFilters($config);
     }
 
-    protected function setupFilters($config) {
+    protected function setupFilters($config)
+    {
         foreach ($this->registeredFilters as $name => $filter) {
-            $conf = $config->get('URI.' . $name);
-            if ($conf !== false && $conf !== null) {
+            if ($filter->always_load) {
                 $this->addFilter($filter, $config);
+            } else {
+                $conf = $config->get('URI.' . $name);
+                if ($conf !== false && $conf !== null) {
+                    $this->addFilter($filter, $config);
+                }
             }
         }
         unset($this->registeredFilters);
     }
 
-    protected function setupMemberVariables($config) {
+    protected function setupMemberVariables($config)
+    {
         $this->host = $config->get('URI.Host');
         $base_uri = $config->get('URI.Base');
         if (!is_null($base_uri)) {
@@ -72,7 +84,13 @@ class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
         if (is_null($this->defaultScheme)) $this->defaultScheme = $config->get('URI.DefaultScheme');
     }
 
-    public function filter(&$uri, $config, $context) {
+    public function getDefaultScheme($config, $context)
+    {
+        return HTMLPurifier_URISchemeRegistry::instance()->getScheme($this->defaultScheme, $config, $context);
+    }
+
+    public function filter(&$uri, $config, $context)
+    {
         foreach ($this->filters as $name => $f) {
             $result = $f->filter($uri, $config, $context);
             if (!$result) return false;
@@ -80,7 +98,8 @@ class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
         return true;
     }
 
-    public function postFilter(&$uri, $config, $context) {
+    public function postFilter(&$uri, $config, $context)
+    {
         foreach ($this->postFilters as $name => $f) {
             $result = $f->filter($uri, $config, $context);
             if (!$result) return false;
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter.php
new file mode 100644
index 0000000000..09724e9f41
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * Chainable filters for custom URI processing.
+ *
+ * These filters can perform custom actions on a URI filter object,
+ * including transformation or blacklisting.  A filter named Foo
+ * must have a corresponding configuration directive %URI.Foo,
+ * unless always_load is specified to be true.
+ *
+ * The following contexts may be available while URIFilters are being
+ * processed:
+ *
+ *      - EmbeddedURI: true if URI is an embedded resource that will
+ *        be loaded automatically on page load
+ *      - CurrentToken: a reference to the token that is currently
+ *        being processed
+ *      - CurrentAttr: the name of the attribute that is currently being
+ *        processed
+ *      - CurrentCSSProperty: the name of the CSS property that is
+ *        currently being processed (if applicable)
+ *
+ * @warning This filter is called before scheme object validation occurs.
+ *          Make sure, if you require a specific scheme object, you
+ *          you check that it exists. This allows filters to convert
+ *          proprietary URI schemes into regular ones.
+ */
+abstract class HTMLPurifier_URIFilter
+{
+
+    /**
+     * Unique identifier of filter.
+     * @type string
+     */
+    public $name;
+
+    /**
+     * True if this filter should be run after scheme validation.
+     * @type bool
+     */
+    public $post = false;
+
+    /**
+     * True if this filter should always be loaded.
+     * This permits a filter to be named Foo without the corresponding
+     * %URI.Foo directive existing.
+     * @type bool
+     */
+    public $always_load = false;
+
+    /**
+     * Performs initialization for the filter.  If the filter returns
+     * false, this means that it shouldn't be considered active.
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function prepare($config)
+    {
+        return true;
+    }
+
+    /**
+     * Filter a URI object
+     * @param HTMLPurifier_URI $uri Reference to URI object variable
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool Whether or not to continue processing: false indicates
+     *         URL is no good, true indicates continue processing. Note that
+     *         all changes are committed directly on the URI object
+     */
+    abstract public function filter(&$uri, $config, $context);
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternal.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternal.php
new file mode 100644
index 0000000000..ced1b13763
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternal.php
@@ -0,0 +1,54 @@
+<?php
+
+class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
+{
+    /**
+     * @type string
+     */
+    public $name = 'DisableExternal';
+
+    /**
+     * @type array
+     */
+    protected $ourHostParts = false;
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return void
+     */
+    public function prepare($config)
+    {
+        $our_host = $config->getDefinition('URI')->host;
+        if ($our_host !== null) {
+            $this->ourHostParts = array_reverse(explode('.', $our_host));
+        }
+    }
+
+    /**
+     * @param HTMLPurifier_URI $uri Reference
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        if (is_null($uri->host)) {
+            return true;
+        }
+        if ($this->ourHostParts === false) {
+            return false;
+        }
+        $host_parts = array_reverse(explode('.', $uri->host));
+        foreach ($this->ourHostParts as $i => $x) {
+            if (!isset($host_parts[$i])) {
+                return false;
+            }
+            if ($host_parts[$i] != $this->ourHostParts[$i]) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternalResources.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternalResources.php
new file mode 100644
index 0000000000..c6562169e0
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableExternalResources.php
@@ -0,0 +1,25 @@
+<?php
+
+class HTMLPurifier_URIFilter_DisableExternalResources extends HTMLPurifier_URIFilter_DisableExternal
+{
+    /**
+     * @type string
+     */
+    public $name = 'DisableExternalResources';
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        if (!$context->get('EmbeddedURI', true)) {
+            return true;
+        }
+        return parent::filter($uri, $config, $context);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableResources.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableResources.php
new file mode 100644
index 0000000000..d5c412c444
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/DisableResources.php
@@ -0,0 +1,22 @@
+<?php
+
+class HTMLPurifier_URIFilter_DisableResources extends HTMLPurifier_URIFilter
+{
+    /**
+     * @type string
+     */
+    public $name = 'DisableResources';
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        return !$context->get('EmbeddedURI', true);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php
new file mode 100644
index 0000000000..a6645c17ee
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/HostBlacklist.php
@@ -0,0 +1,46 @@
+<?php
+
+// It's not clear to me whether or not Punycode means that hostnames
+// do not have canonical forms anymore. As far as I can tell, it's
+// not a problem (punycoding should be identity when no Unicode
+// points are involved), but I'm not 100% sure
+class HTMLPurifier_URIFilter_HostBlacklist extends HTMLPurifier_URIFilter
+{
+    /**
+     * @type string
+     */
+    public $name = 'HostBlacklist';
+
+    /**
+     * @type array
+     */
+    protected $blacklist = array();
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function prepare($config)
+    {
+        $this->blacklist = $config->get('URI.HostBlacklist');
+        return true;
+    }
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        foreach ($this->blacklist as $blacklisted_host_fragment) {
+            if (strpos($uri->host, $blacklisted_host_fragment) !== false) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIFilter/MakeAbsolute.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php
similarity index 71%
rename from library/HTMLPurifier/URIFilter/MakeAbsolute.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php
index f46ab2630d..c507bbff8e 100644
--- a/library/HTMLPurifier/URIFilter/MakeAbsolute.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php
@@ -4,14 +4,35 @@
 
 class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
 {
+    /**
+     * @type string
+     */
     public $name = 'MakeAbsolute';
+
+    /**
+     * @type
+     */
     protected $base;
+
+    /**
+     * @type array
+     */
     protected $basePathStack = array();
-    public function prepare($config) {
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function prepare($config)
+    {
         $def = $config->getDefinition('URI');
         $this->base = $def->base;
         if (is_null($this->base)) {
-            trigger_error('URI.MakeAbsolute is being ignored due to lack of value for URI.Base configuration', E_USER_WARNING);
+            trigger_error(
+                'URI.MakeAbsolute is being ignored due to lack of ' .
+                'value for URI.Base configuration',
+                E_USER_WARNING
+            );
             return false;
         }
         $this->base->fragment = null; // fragment is invalid for base URI
@@ -21,19 +42,29 @@ class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
         $this->basePathStack = $stack;
         return true;
     }
-    public function filter(&$uri, $config, $context) {
-        if (is_null($this->base)) return true; // abort early
-        if (
-            $uri->path === '' && is_null($uri->scheme) &&
-            is_null($uri->host) && is_null($uri->query) && is_null($uri->fragment)
-        ) {
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        if (is_null($this->base)) {
+            return true;
+        } // abort early
+        if ($uri->path === '' && is_null($uri->scheme) &&
+            is_null($uri->host) && is_null($uri->query) && is_null($uri->fragment)) {
             // reference to current document
             $uri = clone $this->base;
             return true;
         }
         if (!is_null($uri->scheme)) {
             // absolute URI already: don't change
-            if (!is_null($uri->host)) return true;
+            if (!is_null($uri->host)) {
+                return true;
+            }
             $scheme_obj = $uri->getSchemeObj($config, $context);
             if (!$scheme_obj) {
                 // scheme not recognized
@@ -66,22 +97,33 @@ class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
         }
         // re-combine
         $uri->scheme = $this->base->scheme;
-        if (is_null($uri->userinfo)) $uri->userinfo = $this->base->userinfo;
-        if (is_null($uri->host))     $uri->host     = $this->base->host;
-        if (is_null($uri->port))     $uri->port     = $this->base->port;
+        if (is_null($uri->userinfo)) {
+            $uri->userinfo = $this->base->userinfo;
+        }
+        if (is_null($uri->host)) {
+            $uri->host = $this->base->host;
+        }
+        if (is_null($uri->port)) {
+            $uri->port = $this->base->port;
+        }
         return true;
     }
 
     /**
      * Resolve dots and double-dots in a path stack
+     * @param array $stack
+     * @return array
      */
-    private function _collapseStack($stack) {
+    private function _collapseStack($stack)
+    {
         $result = array();
         $is_folder = false;
         for ($i = 0; isset($stack[$i]); $i++) {
             $is_folder = false;
             // absorb an internally duplicated slash
-            if ($stack[$i] == '' && $i && isset($stack[$i+1])) continue;
+            if ($stack[$i] == '' && $i && isset($stack[$i + 1])) {
+                continue;
+            }
             if ($stack[$i] == '..') {
                 if (!empty($result)) {
                     $segment = array_pop($result);
@@ -106,7 +148,9 @@ class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
             }
             $result[] = $stack[$i];
         }
-        if ($is_folder) $result[] = '';
+        if ($is_folder) {
+            $result[] = '';
+        }
         return $result;
     }
 }
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/Munge.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/Munge.php
new file mode 100644
index 0000000000..6e03315a17
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/Munge.php
@@ -0,0 +1,115 @@
+<?php
+
+class HTMLPurifier_URIFilter_Munge extends HTMLPurifier_URIFilter
+{
+    /**
+     * @type string
+     */
+    public $name = 'Munge';
+
+    /**
+     * @type bool
+     */
+    public $post = true;
+
+    /**
+     * @type string
+     */
+    private $target;
+
+    /**
+     * @type HTMLPurifier_URIParser
+     */
+    private $parser;
+
+    /**
+     * @type bool
+     */
+    private $doEmbed;
+
+    /**
+     * @type string
+     */
+    private $secretKey;
+
+    /**
+     * @type array
+     */
+    protected $replace = array();
+
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function prepare($config)
+    {
+        $this->target = $config->get('URI.' . $this->name);
+        $this->parser = new HTMLPurifier_URIParser();
+        $this->doEmbed = $config->get('URI.MungeResources');
+        $this->secretKey = $config->get('URI.MungeSecretKey');
+        if ($this->secretKey && !function_exists('hash_hmac')) {
+            throw new Exception("Cannot use %URI.MungeSecretKey without hash_hmac support.");
+        }
+        return true;
+    }
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        if ($context->get('EmbeddedURI', true) && !$this->doEmbed) {
+            return true;
+        }
+
+        $scheme_obj = $uri->getSchemeObj($config, $context);
+        if (!$scheme_obj) {
+            return true;
+        } // ignore unknown schemes, maybe another postfilter did it
+        if (!$scheme_obj->browsable) {
+            return true;
+        } // ignore non-browseable schemes, since we can't munge those in a reasonable way
+        if ($uri->isBenign($config, $context)) {
+            return true;
+        } // don't redirect if a benign URL
+
+        $this->makeReplace($uri, $config, $context);
+        $this->replace = array_map('rawurlencode', $this->replace);
+
+        $new_uri = strtr($this->target, $this->replace);
+        $new_uri = $this->parser->parse($new_uri);
+        // don't redirect if the target host is the same as the
+        // starting host
+        if ($uri->host === $new_uri->host) {
+            return true;
+        }
+        $uri = $new_uri; // overwrite
+        return true;
+    }
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     */
+    protected function makeReplace($uri, $config, $context)
+    {
+        $string = $uri->toString();
+        // always available
+        $this->replace['%s'] = $string;
+        $this->replace['%r'] = $context->get('EmbeddedURI', true);
+        $token = $context->get('CurrentToken', true);
+        $this->replace['%n'] = $token ? $token->name : null;
+        $this->replace['%m'] = $context->get('CurrentAttr', true);
+        $this->replace['%p'] = $context->get('CurrentCSSProperty', true);
+        // not always available
+        if ($this->secretKey) {
+            $this->replace['%t'] = hash_hmac("sha256", $string, $this->secretKey);
+        }
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/SafeIframe.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/SafeIframe.php
new file mode 100644
index 0000000000..f609c47a34
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/SafeIframe.php
@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * Implements safety checks for safe iframes.
+ *
+ * @warning This filter is *critical* for ensuring that %HTML.SafeIframe
+ * works safely.
+ */
+class HTMLPurifier_URIFilter_SafeIframe extends HTMLPurifier_URIFilter
+{
+    /**
+     * @type string
+     */
+    public $name = 'SafeIframe';
+
+    /**
+     * @type bool
+     */
+    public $always_load = true;
+
+    /**
+     * @type string
+     */
+    protected $regexp = null;
+
+    // XXX: The not so good bit about how this is all set up now is we
+    // can't check HTML.SafeIframe in the 'prepare' step: we have to
+    // defer till the actual filtering.
+    /**
+     * @param HTMLPurifier_Config $config
+     * @return bool
+     */
+    public function prepare($config)
+    {
+        $this->regexp = $config->get('URI.SafeIframeRegexp');
+        return true;
+    }
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function filter(&$uri, $config, $context)
+    {
+        // check if filter not applicable
+        if (!$config->get('HTML.SafeIframe')) {
+            return true;
+        }
+        // check if the filter should actually trigger
+        if (!$context->get('EmbeddedURI', true)) {
+            return true;
+        }
+        $token = $context->get('CurrentToken', true);
+        if (!($token && $token->name == 'iframe')) {
+            return true;
+        }
+        // check if we actually have some whitelists enabled
+        if ($this->regexp === null) {
+            return false;
+        }
+        // actually check the whitelists
+        return preg_match($this->regexp, $uri->toString());
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIParser.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIParser.php
similarity index 94%
rename from library/HTMLPurifier/URIParser.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIParser.php
index 7179e4ab89..0e7381a07b 100644
--- a/library/HTMLPurifier/URIParser.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIParser.php
@@ -12,7 +12,8 @@ class HTMLPurifier_URIParser
      */
     protected $percentEncoder;
 
-    public function __construct() {
+    public function __construct()
+    {
         $this->percentEncoder = new HTMLPurifier_PercentEncoder();
     }
 
@@ -22,15 +23,15 @@ class HTMLPurifier_URIParser
      * @return HTMLPurifier_URI representation of URI. This representation has
      *         not been validated yet and may not conform to RFC.
      */
-    public function parse($uri) {
-
+    public function parse($uri)
+    {
         $uri = $this->percentEncoder->normalize($uri);
 
         // Regexp is as per Appendix B.
         // Note that ["<>] are an addition to the RFC's recommended
         // characters, because they represent external delimeters.
         $r_URI = '!'.
-            '(([^:/?#"<>]+):)?'. // 2. Scheme
+            '(([a-zA-Z0-9\.\+\-]+):)?'. // 2. Scheme
             '(//([^/?#"<>]*))?'. // 4. Authority
             '([^?#"<>]*)'.       // 5. Path
             '(\?([^#"<>]*))?'.   // 7. Query
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme.php
new file mode 100644
index 0000000000..fe9e82cf26
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme.php
@@ -0,0 +1,102 @@
+<?php
+
+/**
+ * Validator for the components of a URI for a specific scheme
+ */
+abstract class HTMLPurifier_URIScheme
+{
+
+    /**
+     * Scheme's default port (integer). If an explicit port number is
+     * specified that coincides with the default port, it will be
+     * elided.
+     * @type int
+     */
+    public $default_port = null;
+
+    /**
+     * Whether or not URIs of this scheme are locatable by a browser
+     * http and ftp are accessible, while mailto and news are not.
+     * @type bool
+     */
+    public $browsable = false;
+
+    /**
+     * Whether or not data transmitted over this scheme is encrypted.
+     * https is secure, http is not.
+     * @type bool
+     */
+    public $secure = false;
+
+    /**
+     * Whether or not the URI always uses <hier_part>, resolves edge cases
+     * with making relative URIs absolute
+     * @type bool
+     */
+    public $hierarchical = false;
+
+    /**
+     * Whether or not the URI may omit a hostname when the scheme is
+     * explicitly specified, ala file:///path/to/file. As of writing,
+     * 'file' is the only scheme that browsers support his properly.
+     * @type bool
+     */
+    public $may_omit_host = false;
+
+    /**
+     * Validates the components of a URI for a specific scheme.
+     * @param HTMLPurifier_URI $uri Reference to a HTMLPurifier_URI object
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool success or failure
+     */
+    abstract public function doValidate(&$uri, $config, $context);
+
+    /**
+     * Public interface for validating components of a URI.  Performs a
+     * bunch of default actions. Don't overload this method.
+     * @param HTMLPurifier_URI $uri Reference to a HTMLPurifier_URI object
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool success or failure
+     */
+    public function validate(&$uri, $config, $context)
+    {
+        if ($this->default_port == $uri->port) {
+            $uri->port = null;
+        }
+        // kludge: browsers do funny things when the scheme but not the
+        // authority is set
+        if (!$this->may_omit_host &&
+            // if the scheme is present, a missing host is always in error
+            (!is_null($uri->scheme) && ($uri->host === '' || is_null($uri->host))) ||
+            // if the scheme is not present, a *blank* host is in error,
+            // since this translates into '///path' which most browsers
+            // interpret as being 'http://path'.
+            (is_null($uri->scheme) && $uri->host === '')
+        ) {
+            do {
+                if (is_null($uri->scheme)) {
+                    if (substr($uri->path, 0, 2) != '//') {
+                        $uri->host = null;
+                        break;
+                    }
+                    // URI is '////path', so we cannot nullify the
+                    // host to preserve semantics.  Try expanding the
+                    // hostname instead (fall through)
+                }
+                // first see if we can manually insert a hostname
+                $host = $config->get('URI.Host');
+                if (!is_null($host)) {
+                    $uri->host = $host;
+                } else {
+                    // we can't do anything sensible, reject the URL.
+                    return false;
+                }
+            } while (false);
+        }
+        return $this->doValidate($uri, $config, $context);
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/data.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/data.php
similarity index 74%
rename from library/HTMLPurifier/URIScheme/data.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/data.php
index b7f1989cbf..6ebca49848 100644
--- a/library/HTMLPurifier/URIScheme/data.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/data.php
@@ -3,18 +3,38 @@
 /**
  * Implements data: URI for base64 encoded images supported by GD.
  */
-class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
-
+class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type bool
+     */
     public $browsable = true;
+
+    /**
+     * @type array
+     */
     public $allowed_types = array(
         // you better write validation code for other types if you
         // decide to allow them
         'image/jpeg' => true,
         'image/gif' => true,
         'image/png' => true,
-        );
+    );
+    // this is actually irrelevant since we only write out the path
+    // component
+    /**
+     * @type bool
+     */
+    public $may_omit_host = true;
 
-    public function validate(&$uri, $config, $context) {
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
         $result = explode(',', $uri->path, 2);
         $is_base64 = false;
         $charset = null;
@@ -23,7 +43,7 @@ class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
             list($metadata, $data) = $result;
             // do some legwork on the metadata
             $metas = explode(';', $metadata);
-            while(!empty($metas)) {
+            while (!empty($metas)) {
                 $cur = array_shift($metas);
                 if ($cur == 'base64') {
                     $is_base64 = true;
@@ -32,10 +52,14 @@ class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
                 if (substr($cur, 0, 8) == 'charset=') {
                     // doesn't match if there are arbitrary spaces, but
                     // whatever dude
-                    if ($charset !== null) continue; // garbage
+                    if ($charset !== null) {
+                        continue;
+                    } // garbage
                     $charset = substr($cur, 8); // not used
                 } else {
-                    if ($content_type !== null) continue; // garbage
+                    if ($content_type !== null) {
+                        continue;
+                    } // garbage
                     $content_type = $cur;
                 }
             }
@@ -61,11 +85,15 @@ class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
         file_put_contents($file, $raw_data);
         if (function_exists('exif_imagetype')) {
             $image_code = exif_imagetype($file);
+            unlink($file);
         } elseif (function_exists('getimagesize')) {
             set_error_handler(array($this, 'muteErrorHandler'));
             $info = getimagesize($file);
             restore_error_handler();
-            if ($info == false) return false;
+            unlink($file);
+            if ($info == false) {
+                return false;
+            }
             $image_code = $info[2];
         } else {
             trigger_error("could not find exif_imagetype or getimagesize functions", E_USER_ERROR);
@@ -74,7 +102,9 @@ class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
         if ($real_content_type != $content_type) {
             // we're nice guys; if the content type is something else we
             // support, change it over
-            if (empty($this->allowed_types[$real_content_type])) return false;
+            if (empty($this->allowed_types[$real_content_type])) {
+                return false;
+            }
             $content_type = $real_content_type;
         }
         // ok, it's kosher, rewrite what we need
@@ -87,7 +117,11 @@ class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
         return true;
     }
 
-    public function muteErrorHandler($errno, $errstr) {}
-
+    /**
+     * @param int $errno
+     * @param string $errstr
+     */
+    public function muteErrorHandler($errno, $errstr)
+    {
+    }
 }
-
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/file.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/file.php
new file mode 100644
index 0000000000..215be4ba80
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/file.php
@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Validates file as defined by RFC 1630 and RFC 1738.
+ */
+class HTMLPurifier_URIScheme_file extends HTMLPurifier_URIScheme
+{
+    /**
+     * Generally file:// URLs are not accessible from most
+     * machines, so placing them as an img src is incorrect.
+     * @type bool
+     */
+    public $browsable = false;
+
+    /**
+     * Basically the *only* URI scheme for which this is true, since
+     * accessing files on the local machine is very common.  In fact,
+     * browsers on some operating systems don't understand the
+     * authority, though I hear it is used on Windows to refer to
+     * network shares.
+     * @type bool
+     */
+    public $may_omit_host = true;
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
+        // Authentication method is not supported
+        $uri->userinfo = null;
+        // file:// makes no provisions for accessing the resource
+        $uri->port = null;
+        // While it seems to work on Firefox, the querystring has
+        // no possible effect and is thus stripped.
+        $uri->query = null;
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/ftp.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/ftp.php
similarity index 74%
rename from library/HTMLPurifier/URIScheme/ftp.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/ftp.php
index 5849bf7ff0..1eb43ee5c4 100644
--- a/library/HTMLPurifier/URIScheme/ftp.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/ftp.php
@@ -3,15 +3,32 @@
 /**
  * Validates ftp (File Transfer Protocol) URIs as defined by generic RFC 1738.
  */
-class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
-
+class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type int
+     */
     public $default_port = 21;
+
+    /**
+     * @type bool
+     */
     public $browsable = true; // usually
+
+    /**
+     * @type bool
+     */
     public $hierarchical = true;
 
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->query    = null;
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
+        $uri->query = null;
 
         // typecode check
         $semicolon_pos = strrpos($uri->path, ';'); // reverse
@@ -34,10 +51,8 @@ class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
             $uri->path = str_replace(';', '%3B', $uri->path);
             $uri->path .= $type_ret;
         }
-
         return true;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/http.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/http.php
similarity index 50%
rename from library/HTMLPurifier/URIScheme/http.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/http.php
index b097a31d6a..ce69ec438a 100644
--- a/library/HTMLPurifier/URIScheme/http.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/http.php
@@ -3,18 +3,34 @@
 /**
  * Validates http (HyperText Transfer Protocol) as defined by RFC 2616
  */
-class HTMLPurifier_URIScheme_http extends HTMLPurifier_URIScheme {
-
+class HTMLPurifier_URIScheme_http extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type int
+     */
     public $default_port = 80;
+
+    /**
+     * @type bool
+     */
     public $browsable = true;
+
+    /**
+     * @type bool
+     */
     public $hierarchical = true;
 
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
         $uri->userinfo = null;
         return true;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/https.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/https.php
similarity index 65%
rename from library/HTMLPurifier/URIScheme/https.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/https.php
index 29e380919f..0e96882db9 100644
--- a/library/HTMLPurifier/URIScheme/https.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/https.php
@@ -3,10 +3,16 @@
 /**
  * Validates https (Secure HTTP) according to http scheme.
  */
-class HTMLPurifier_URIScheme_https extends HTMLPurifier_URIScheme_http {
-
+class HTMLPurifier_URIScheme_https extends HTMLPurifier_URIScheme_http
+{
+    /**
+     * @type int
+     */
     public $default_port = 443;
-
+    /**
+     * @type bool
+     */
+    public $secure = true;
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URIScheme/mailto.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/mailto.php
similarity index 63%
rename from library/HTMLPurifier/URIScheme/mailto.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/mailto.php
index c1e2cd5aae..c3a6b602a7 100644
--- a/library/HTMLPurifier/URIScheme/mailto.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/mailto.php
@@ -9,19 +9,32 @@
  * @todo Filter allowed query parameters
  */
 
-class HTMLPurifier_URIScheme_mailto extends HTMLPurifier_URIScheme {
-
+class HTMLPurifier_URIScheme_mailto extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type bool
+     */
     public $browsable = false;
 
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
+    /**
+     * @type bool
+     */
+    public $may_omit_host = true;
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
         $uri->userinfo = null;
         $uri->host     = null;
         $uri->port     = null;
         // we need to validate path against RFC 2368's addr-spec
         return true;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/news.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/news.php
new file mode 100644
index 0000000000..7490927d63
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/news.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * Validates news (Usenet) as defined by generic RFC 1738
+ */
+class HTMLPurifier_URIScheme_news extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type bool
+     */
+    public $browsable = false;
+
+    /**
+     * @type bool
+     */
+    public $may_omit_host = true;
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
+        $uri->userinfo = null;
+        $uri->host = null;
+        $uri->port = null;
+        $uri->query = null;
+        // typecode check needed on path
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/nntp.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/nntp.php
new file mode 100644
index 0000000000..f211d715e9
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme/nntp.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * Validates nntp (Network News Transfer Protocol) as defined by generic RFC 1738
+ */
+class HTMLPurifier_URIScheme_nntp extends HTMLPurifier_URIScheme
+{
+    /**
+     * @type int
+     */
+    public $default_port = 119;
+
+    /**
+     * @type bool
+     */
+    public $browsable = false;
+
+    /**
+     * @param HTMLPurifier_URI $uri
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool
+     */
+    public function doValidate(&$uri, $config, $context)
+    {
+        $uri->userinfo = null;
+        $uri->query = null;
+        return true;
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/URISchemeRegistry.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/URISchemeRegistry.php
similarity index 58%
rename from library/HTMLPurifier/URISchemeRegistry.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/URISchemeRegistry.php
index 576bf7b6d1..4ac8a0b76e 100644
--- a/library/HTMLPurifier/URISchemeRegistry.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/URISchemeRegistry.php
@@ -8,12 +8,14 @@ class HTMLPurifier_URISchemeRegistry
 
     /**
      * Retrieve sole instance of the registry.
-     * @param $prototype Optional prototype to overload sole instance with,
+     * @param HTMLPurifier_URISchemeRegistry $prototype Optional prototype to overload sole instance with,
      *                   or bool true to reset to default registry.
+     * @return HTMLPurifier_URISchemeRegistry
      * @note Pass a registry object $prototype with a compatible interface and
      *       the function will copy it and return it all further times.
      */
-    public static function instance($prototype = null) {
+    public static function instance($prototype = null)
+    {
         static $instance = null;
         if ($prototype !== null) {
             $instance = $prototype;
@@ -25,17 +27,22 @@ class HTMLPurifier_URISchemeRegistry
 
     /**
      * Cache of retrieved schemes.
+     * @type HTMLPurifier_URIScheme[]
      */
     protected $schemes = array();
 
     /**
      * Retrieves a scheme validator object
-     * @param $scheme String scheme name like http or mailto
-     * @param $config HTMLPurifier_Config object
-     * @param $config HTMLPurifier_Context object
+     * @param string $scheme String scheme name like http or mailto
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return HTMLPurifier_URIScheme
      */
-    public function getScheme($scheme, $config, $context) {
-        if (!$config) $config = HTMLPurifier_Config::createDefault();
+    public function getScheme($scheme, $config, $context)
+    {
+        if (!$config) {
+            $config = HTMLPurifier_Config::createDefault();
+        }
 
         // important, otherwise attacker could include arbitrary file
         $allowed_schemes = $config->get('URI.AllowedSchemes');
@@ -45,24 +52,30 @@ class HTMLPurifier_URISchemeRegistry
             return;
         }
 
-        if (isset($this->schemes[$scheme])) return $this->schemes[$scheme];
-        if (!isset($allowed_schemes[$scheme])) return;
+        if (isset($this->schemes[$scheme])) {
+            return $this->schemes[$scheme];
+        }
+        if (!isset($allowed_schemes[$scheme])) {
+            return;
+        }
 
         $class = 'HTMLPurifier_URIScheme_' . $scheme;
-        if (!class_exists($class)) return;
+        if (!class_exists($class)) {
+            return;
+        }
         $this->schemes[$scheme] = new $class();
         return $this->schemes[$scheme];
     }
 
     /**
      * Registers a custom scheme to the cache, bypassing reflection.
-     * @param $scheme Scheme name
-     * @param $scheme_obj HTMLPurifier_URIScheme object
+     * @param string $scheme Scheme name
+     * @param HTMLPurifier_URIScheme $scheme_obj
      */
-    public function register($scheme, $scheme_obj) {
+    public function register($scheme, $scheme_obj)
+    {
         $this->schemes[$scheme] = $scheme_obj;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/UnitConverter.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/UnitConverter.php
similarity index 75%
rename from library/HTMLPurifier/UnitConverter.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/UnitConverter.php
index 545d426220..166f3bf306 100644
--- a/library/HTMLPurifier/UnitConverter.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/UnitConverter.php
@@ -37,20 +37,24 @@ class HTMLPurifier_UnitConverter
 
     /**
      * Minimum bcmath precision for output.
+     * @type int
      */
     protected $outputPrecision;
 
     /**
      * Bcmath precision for internal calculations.
+     * @type int
      */
     protected $internalPrecision;
 
     /**
-     * Whether or not BCMath is available
+     * Whether or not BCMath is available.
+     * @type bool
      */
     private $bcmath;
 
-    public function __construct($output_precision = 4, $internal_precision = 10, $force_no_bcmath = false) {
+    public function __construct($output_precision = 4, $internal_precision = 10, $force_no_bcmath = false)
+    {
         $this->outputPrecision = $output_precision;
         $this->internalPrecision = $internal_precision;
         $this->bcmath = !$force_no_bcmath && function_exists('bcmul');
@@ -63,6 +67,7 @@ class HTMLPurifier_UnitConverter
      *      it before passing it here!
      * @param string $to_unit
      *      Unit to convert to.
+     * @return HTMLPurifier_Length|bool
      * @note
      *      About precision: This conversion function pays very special
      *      attention to the incoming precision of values and attempts
@@ -74,11 +79,13 @@ class HTMLPurifier_UnitConverter
      *            and this causes some decimals to be excluded, those
      *            decimals will be added on.
      */
-    public function convert($length, $to_unit) {
+    public function convert($length, $to_unit)
+    {
+        if (!$length->isValid()) {
+            return false;
+        }
 
-        if (!$length->isValid()) return false;
-
-        $n    = $length->getN();
+        $n = $length->getN();
         $unit = $length->getUnit();
 
         if ($n === '0' || $unit === false) {
@@ -87,21 +94,29 @@ class HTMLPurifier_UnitConverter
 
         $state = $dest_state = false;
         foreach (self::$units as $k => $x) {
-            if (isset($x[$unit])) $state = $k;
-            if (isset($x[$to_unit])) $dest_state = $k;
+            if (isset($x[$unit])) {
+                $state = $k;
+            }
+            if (isset($x[$to_unit])) {
+                $dest_state = $k;
+            }
+        }
+        if (!$state || !$dest_state) {
+            return false;
         }
-        if (!$state || !$dest_state) return false;
 
         // Some calculations about the initial precision of the number;
         // this will be useful when we need to do final rounding.
         $sigfigs = $this->getSigFigs($n);
-        if ($sigfigs < $this->outputPrecision) $sigfigs = $this->outputPrecision;
+        if ($sigfigs < $this->outputPrecision) {
+            $sigfigs = $this->outputPrecision;
+        }
 
         // BCMath's internal precision deals only with decimals. Use
         // our default if the initial number has no decimals, or increase
         // it by how ever many decimals, thus, the number of guard digits
         // will always be greater than or equal to internalPrecision.
-        $log = (int) floor(log(abs($n), 10));
+        $log = (int)floor(log(abs($n), 10));
         $cp = ($log < 0) ? $this->internalPrecision - $log : $this->internalPrecision; // internal precision
 
         for ($i = 0; $i < 2; $i++) {
@@ -152,14 +167,18 @@ class HTMLPurifier_UnitConverter
         }
 
         // Post-condition: $unit == $to_unit
-        if ($unit !== $to_unit) return false;
+        if ($unit !== $to_unit) {
+            return false;
+        }
 
         // Useful for debugging:
         //echo "<pre>n";
         //echo "$n\nsigfigs = $sigfigs\nnew_log = $new_log\nlog = $log\nrp = $rp\n</pre>\n";
 
         $n = $this->round($n, $sigfigs);
-        if (strpos($n, '.') !== false) $n = rtrim($n, '0');
+        if (strpos($n, '.') !== false) {
+            $n = rtrim($n, '0');
+        }
         $n = rtrim($n, '.');
 
         return new HTMLPurifier_Length($n, $unit);
@@ -170,53 +189,84 @@ class HTMLPurifier_UnitConverter
      * @param string $n Decimal number
      * @return int number of sigfigs
      */
-    public function getSigFigs($n) {
+    public function getSigFigs($n)
+    {
         $n = ltrim($n, '0+-');
         $dp = strpos($n, '.'); // decimal position
         if ($dp === false) {
             $sigfigs = strlen(rtrim($n, '0'));
         } else {
             $sigfigs = strlen(ltrim($n, '0.')); // eliminate extra decimal character
-            if ($dp !== 0) $sigfigs--;
+            if ($dp !== 0) {
+                $sigfigs--;
+            }
         }
         return $sigfigs;
     }
 
     /**
      * Adds two numbers, using arbitrary precision when available.
+     * @param string $s1
+     * @param string $s2
+     * @param int $scale
+     * @return string
      */
-    private function add($s1, $s2, $scale) {
-        if ($this->bcmath) return bcadd($s1, $s2, $scale);
-        else return $this->scale($s1 + $s2, $scale);
+    private function add($s1, $s2, $scale)
+    {
+        if ($this->bcmath) {
+            return bcadd($s1, $s2, $scale);
+        } else {
+            return $this->scale((float)$s1 + (float)$s2, $scale);
+        }
     }
 
     /**
      * Multiples two numbers, using arbitrary precision when available.
+     * @param string $s1
+     * @param string $s2
+     * @param int $scale
+     * @return string
      */
-    private function mul($s1, $s2, $scale) {
-        if ($this->bcmath) return bcmul($s1, $s2, $scale);
-        else return $this->scale($s1 * $s2, $scale);
+    private function mul($s1, $s2, $scale)
+    {
+        if ($this->bcmath) {
+            return bcmul($s1, $s2, $scale);
+        } else {
+            return $this->scale((float)$s1 * (float)$s2, $scale);
+        }
     }
 
     /**
      * Divides two numbers, using arbitrary precision when available.
+     * @param string $s1
+     * @param string $s2
+     * @param int $scale
+     * @return string
      */
-    private function div($s1, $s2, $scale) {
-        if ($this->bcmath) return bcdiv($s1, $s2, $scale);
-        else return $this->scale($s1 / $s2, $scale);
+    private function div($s1, $s2, $scale)
+    {
+        if ($this->bcmath) {
+            return bcdiv($s1, $s2, $scale);
+        } else {
+            return $this->scale((float)$s1 / (float)$s2, $scale);
+        }
     }
 
     /**
      * Rounds a number according to the number of sigfigs it should have,
      * using arbitrary precision when available.
+     * @param float $n
+     * @param int $sigfigs
+     * @return string
      */
-    private function round($n, $sigfigs) {
-        $new_log = (int) floor(log(abs($n), 10)); // Number of digits left of decimal - 1
+    private function round($n, $sigfigs)
+    {
+        $new_log = (int)floor(log(abs($n), 10)); // Number of digits left of decimal - 1
         $rp = $sigfigs - $new_log - 1; // Number of decimal places needed
         $neg = $n < 0 ? '-' : ''; // Negative sign
         if ($this->bcmath) {
             if ($rp >= 0) {
-                $n = bcadd($n, $neg . '0.' .  str_repeat('0', $rp) . '5', $rp + 1);
+                $n = bcadd($n, $neg . '0.' . str_repeat('0', $rp) . '5', $rp + 1);
                 $n = bcdiv($n, '1', $rp);
             } else {
                 // This algorithm partially depends on the standardized
@@ -232,23 +282,26 @@ class HTMLPurifier_UnitConverter
 
     /**
      * Scales a float to $scale digits right of decimal point, like BCMath.
+     * @param float $r
+     * @param int $scale
+     * @return string
      */
-    private function scale($r, $scale) {
+    private function scale($r, $scale)
+    {
         if ($scale < 0) {
             // The f sprintf type doesn't support negative numbers, so we
             // need to cludge things manually. First get the string.
-            $r = sprintf('%.0f', (float) $r);
+            $r = sprintf('%.0f', (float)$r);
             // Due to floating point precision loss, $r will more than likely
             // look something like 4652999999999.9234. We grab one more digit
             // than we need to precise from $r and then use that to round
             // appropriately.
-            $precise = (string) round(substr($r, 0, strlen($r) + $scale), -1);
+            $precise = (string)round(substr($r, 0, strlen($r) + $scale), -1);
             // Now we return it, truncating the zero that was rounded off.
             return substr($precise, 0, -1) . str_repeat('0', -$scale + 1);
         }
-        return sprintf('%.' . $scale . 'f', (float) $r);
+        return sprintf('%.' . $scale . 'f', (float)$r);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser.php
new file mode 100644
index 0000000000..50cba6910d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser.php
@@ -0,0 +1,198 @@
+<?php
+
+/**
+ * Parses string representations into their corresponding native PHP
+ * variable type. The base implementation does a simple type-check.
+ */
+class HTMLPurifier_VarParser
+{
+
+    const STRING = 1;
+    const ISTRING = 2;
+    const TEXT = 3;
+    const ITEXT = 4;
+    const INT = 5;
+    const FLOAT = 6;
+    const BOOL = 7;
+    const LOOKUP = 8;
+    const ALIST = 9;
+    const HASH = 10;
+    const MIXED = 11;
+
+    /**
+     * Lookup table of allowed types. Mainly for backwards compatibility, but
+     * also convenient for transforming string type names to the integer constants.
+     */
+    public static $types = array(
+        'string' => self::STRING,
+        'istring' => self::ISTRING,
+        'text' => self::TEXT,
+        'itext' => self::ITEXT,
+        'int' => self::INT,
+        'float' => self::FLOAT,
+        'bool' => self::BOOL,
+        'lookup' => self::LOOKUP,
+        'list' => self::ALIST,
+        'hash' => self::HASH,
+        'mixed' => self::MIXED
+    );
+
+    /**
+     * Lookup table of types that are string, and can have aliases or
+     * allowed value lists.
+     */
+    public static $stringTypes = array(
+        self::STRING => true,
+        self::ISTRING => true,
+        self::TEXT => true,
+        self::ITEXT => true,
+    );
+
+    /**
+     * Validate a variable according to type.
+     * It may return NULL as a valid type if $allow_null is true.
+     *
+     * @param mixed $var Variable to validate
+     * @param int $type Type of variable, see HTMLPurifier_VarParser->types
+     * @param bool $allow_null Whether or not to permit null as a value
+     * @return string Validated and type-coerced variable
+     * @throws HTMLPurifier_VarParserException
+     */
+    final public function parse($var, $type, $allow_null = false)
+    {
+        if (is_string($type)) {
+            if (!isset(HTMLPurifier_VarParser::$types[$type])) {
+                throw new HTMLPurifier_VarParserException("Invalid type '$type'");
+            } else {
+                $type = HTMLPurifier_VarParser::$types[$type];
+            }
+        }
+        $var = $this->parseImplementation($var, $type, $allow_null);
+        if ($allow_null && $var === null) {
+            return null;
+        }
+        // These are basic checks, to make sure nothing horribly wrong
+        // happened in our implementations.
+        switch ($type) {
+            case (self::STRING):
+            case (self::ISTRING):
+            case (self::TEXT):
+            case (self::ITEXT):
+                if (!is_string($var)) {
+                    break;
+                }
+                if ($type == self::ISTRING || $type == self::ITEXT) {
+                    $var = strtolower($var);
+                }
+                return $var;
+            case (self::INT):
+                if (!is_int($var)) {
+                    break;
+                }
+                return $var;
+            case (self::FLOAT):
+                if (!is_float($var)) {
+                    break;
+                }
+                return $var;
+            case (self::BOOL):
+                if (!is_bool($var)) {
+                    break;
+                }
+                return $var;
+            case (self::LOOKUP):
+            case (self::ALIST):
+            case (self::HASH):
+                if (!is_array($var)) {
+                    break;
+                }
+                if ($type === self::LOOKUP) {
+                    foreach ($var as $k) {
+                        if ($k !== true) {
+                            $this->error('Lookup table contains value other than true');
+                        }
+                    }
+                } elseif ($type === self::ALIST) {
+                    $keys = array_keys($var);
+                    if (array_keys($keys) !== $keys) {
+                        $this->error('Indices for list are not uniform');
+                    }
+                }
+                return $var;
+            case (self::MIXED):
+                return $var;
+            default:
+                $this->errorInconsistent(get_class($this), $type);
+        }
+        $this->errorGeneric($var, $type);
+    }
+
+    /**
+     * Actually implements the parsing. Base implementation does not
+     * do anything to $var. Subclasses should overload this!
+     * @param mixed $var
+     * @param int $type
+     * @param bool $allow_null
+     * @return string
+     */
+    protected function parseImplementation($var, $type, $allow_null)
+    {
+        return $var;
+    }
+
+    /**
+     * Throws an exception.
+     * @throws HTMLPurifier_VarParserException
+     */
+    protected function error($msg)
+    {
+        throw new HTMLPurifier_VarParserException($msg);
+    }
+
+    /**
+     * Throws an inconsistency exception.
+     * @note This should not ever be called. It would be called if we
+     *       extend the allowed values of HTMLPurifier_VarParser without
+     *       updating subclasses.
+     * @param string $class
+     * @param int $type
+     * @throws HTMLPurifier_Exception
+     */
+    protected function errorInconsistent($class, $type)
+    {
+        throw new HTMLPurifier_Exception(
+            "Inconsistency in $class: " . HTMLPurifier_VarParser::getTypeName($type) .
+            " not implemented"
+        );
+    }
+
+    /**
+     * Generic error for if a type didn't work.
+     * @param mixed $var
+     * @param int $type
+     */
+    protected function errorGeneric($var, $type)
+    {
+        $vtype = gettype($var);
+        $this->error("Expected type " . HTMLPurifier_VarParser::getTypeName($type) . ", got $vtype");
+    }
+
+    /**
+     * @param int $type
+     * @return string
+     */
+    public static function getTypeName($type)
+    {
+        static $lookup;
+        if (!$lookup) {
+            // Lazy load the alternative lookup table
+            $lookup = array_flip(HTMLPurifier_VarParser::$types);
+        }
+        if (!isset($lookup[$type])) {
+            return 'unknown';
+        }
+        return $lookup[$type];
+    }
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/VarParser/Flexible.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php
similarity index 56%
rename from library/HTMLPurifier/VarParser/Flexible.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php
index c954250e9f..b15016c5b2 100644
--- a/library/HTMLPurifier/VarParser/Flexible.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php
@@ -7,28 +7,41 @@
  */
 class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
 {
-
-    protected function parseImplementation($var, $type, $allow_null) {
-        if ($allow_null && $var === null) return null;
+    /**
+     * @param mixed $var
+     * @param int $type
+     * @param bool $allow_null
+     * @return array|bool|float|int|mixed|null|string
+     * @throws HTMLPurifier_VarParserException
+     */
+    protected function parseImplementation($var, $type, $allow_null)
+    {
+        if ($allow_null && $var === null) {
+            return null;
+        }
         switch ($type) {
             // Note: if code "breaks" from the switch, it triggers a generic
             // exception to be thrown. Specific errors can be specifically
             // done here.
-            case self::MIXED :
-            case self::ISTRING :
-            case self::STRING :
-            case self::TEXT :
-            case self::ITEXT :
+            case self::MIXED:
+            case self::ISTRING:
+            case self::STRING:
+            case self::TEXT:
+            case self::ITEXT:
                 return $var;
-            case self::INT :
-                if (is_string($var) && ctype_digit($var)) $var = (int) $var;
+            case self::INT:
+                if (is_string($var) && ctype_digit($var)) {
+                    $var = (int)$var;
+                }
                 return $var;
-            case self::FLOAT :
-                if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
+            case self::FLOAT:
+                if ((is_string($var) && is_numeric($var)) || is_int($var)) {
+                    $var = (float)$var;
+                }
                 return $var;
-            case self::BOOL :
+            case self::BOOL:
                 if (is_int($var) && ($var === 0 || $var === 1)) {
-                    $var = (bool) $var;
+                    $var = (bool)$var;
                 } elseif (is_string($var)) {
                     if ($var == 'on' || $var == 'true' || $var == '1') {
                         $var = true;
@@ -39,48 +52,70 @@ class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
                     }
                 }
                 return $var;
-            case self::ALIST :
-            case self::HASH :
-            case self::LOOKUP :
+            case self::ALIST:
+            case self::HASH:
+            case self::LOOKUP:
                 if (is_string($var)) {
                     // special case: technically, this is an array with
                     // a single empty string item, but having an empty
                     // array is more intuitive
-                    if ($var == '') return array();
+                    if ($var == '') {
+                        return array();
+                    }
                     if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
                         // simplistic string to array method that only works
                         // for simple lists of tag names or alphanumeric characters
-                        $var = explode(',',$var);
+                        $var = explode(',', $var);
                     } else {
                         $var = preg_split('/(,|[\n\r]+)/', $var);
                     }
                     // remove spaces
-                    foreach ($var as $i => $j) $var[$i] = trim($j);
+                    foreach ($var as $i => $j) {
+                        $var[$i] = trim($j);
+                    }
                     if ($type === self::HASH) {
                         // key:value,key2:value2
                         $nvar = array();
                         foreach ($var as $keypair) {
                             $c = explode(':', $keypair, 2);
-                            if (!isset($c[1])) continue;
-                            $nvar[$c[0]] = $c[1];
+                            if (!isset($c[1])) {
+                                continue;
+                            }
+                            $nvar[trim($c[0])] = trim($c[1]);
                         }
                         $var = $nvar;
                     }
                 }
-                if (!is_array($var)) break;
+                if (!is_array($var)) {
+                    break;
+                }
                 $keys = array_keys($var);
                 if ($keys === array_keys($keys)) {
-                    if ($type == self::ALIST) return $var;
-                    elseif ($type == self::LOOKUP) {
+                    if ($type == self::ALIST) {
+                        return $var;
+                    } elseif ($type == self::LOOKUP) {
                         $new = array();
                         foreach ($var as $key) {
                             $new[$key] = true;
                         }
                         return $new;
-                    } else break;
+                    } else {
+                        break;
+                    }
+                }
+                if ($type === self::ALIST) {
+                    trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
+                    return array_values($var);
                 }
                 if ($type === self::LOOKUP) {
                     foreach ($var as $key => $value) {
+                        if ($value !== true) {
+                            trigger_error(
+                                "Lookup array has non-true value at key '$key'; " .
+                                "maybe your input array was not indexed numerically",
+                                E_USER_WARNING
+                            );
+                        }
                         $var[$key] = true;
                     }
                 }
@@ -90,7 +125,6 @@ class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
         }
         $this->errorGeneric($var, $type);
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/VarParser/Native.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Native.php
similarity index 67%
rename from library/HTMLPurifier/VarParser/Native.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Native.php
index b02a6de54c..f11c318efb 100644
--- a/library/HTMLPurifier/VarParser/Native.php
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParser/Native.php
@@ -8,11 +8,24 @@
 class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
 {
 
-    protected function parseImplementation($var, $type, $allow_null) {
+    /**
+     * @param mixed $var
+     * @param int $type
+     * @param bool $allow_null
+     * @return null|string
+     */
+    protected function parseImplementation($var, $type, $allow_null)
+    {
         return $this->evalExpression($var);
     }
 
-    protected function evalExpression($expr) {
+    /**
+     * @param string $expr
+     * @return mixed
+     * @throws HTMLPurifier_VarParserException
+     */
+    protected function evalExpression($expr)
+    {
         $var = null;
         $result = eval("\$var = $expr;");
         if ($result === false) {
@@ -20,7 +33,6 @@ class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
         }
         return $var;
     }
-
 }
 
 // vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/VarParserException.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/VarParserException.php
similarity index 100%
rename from library/HTMLPurifier/VarParserException.php
rename to library/ezyang/htmlpurifier/library/HTMLPurifier/VarParserException.php
diff --git a/library/ezyang/htmlpurifier/library/HTMLPurifier/Zipper.php b/library/ezyang/htmlpurifier/library/HTMLPurifier/Zipper.php
new file mode 100644
index 0000000000..6e21ea0703
--- /dev/null
+++ b/library/ezyang/htmlpurifier/library/HTMLPurifier/Zipper.php
@@ -0,0 +1,157 @@
+<?php
+
+/**
+ * A zipper is a purely-functional data structure which contains
+ * a focus that can be efficiently manipulated.  It is known as
+ * a "one-hole context".  This mutable variant implements a zipper
+ * for a list as a pair of two arrays, laid out as follows:
+ *
+ *      Base list: 1 2 3 4 [ ] 6 7 8 9
+ *      Front list: 1 2 3 4
+ *      Back list: 9 8 7 6
+ *
+ * User is expected to keep track of the "current element" and properly
+ * fill it back in as necessary.  (ToDo: Maybe it's more user friendly
+ * to implicitly track the current element?)
+ *
+ * Nota bene: the current class gets confused if you try to store NULLs
+ * in the list.
+ */
+
+class HTMLPurifier_Zipper
+{
+    public $front, $back;
+
+    public function __construct($front, $back) {
+        $this->front = $front;
+        $this->back = $back;
+    }
+
+    /**
+     * Creates a zipper from an array, with a hole in the
+     * 0-index position.
+     * @param Array to zipper-ify.
+     * @return Tuple of zipper and element of first position.
+     */
+    static public function fromArray($array) {
+        $z = new self(array(), array_reverse($array));
+        $t = $z->delete(); // delete the "dummy hole"
+        return array($z, $t);
+    }
+
+    /**
+     * Convert zipper back into a normal array, optionally filling in
+     * the hole with a value. (Usually you should supply a $t, unless you
+     * are at the end of the array.)
+     */
+    public function toArray($t = NULL) {
+        $a = $this->front;
+        if ($t !== NULL) $a[] = $t;
+        for ($i = count($this->back)-1; $i >= 0; $i--) {
+            $a[] = $this->back[$i];
+        }
+        return $a;
+    }
+
+    /**
+     * Move hole to the next element.
+     * @param $t Element to fill hole with
+     * @return Original contents of new hole.
+     */
+    public function next($t) {
+        if ($t !== NULL) array_push($this->front, $t);
+        return empty($this->back) ? NULL : array_pop($this->back);
+    }
+
+    /**
+     * Iterated hole advancement.
+     * @param $t Element to fill hole with
+     * @param $i How many forward to advance hole
+     * @return Original contents of new hole, i away
+     */
+    public function advance($t, $n) {
+        for ($i = 0; $i < $n; $i++) {
+            $t = $this->next($t);
+        }
+        return $t;
+    }
+
+    /**
+     * Move hole to the previous element
+     * @param $t Element to fill hole with
+     * @return Original contents of new hole.
+     */
+    public function prev($t) {
+        if ($t !== NULL) array_push($this->back, $t);
+        return empty($this->front) ? NULL : array_pop($this->front);
+    }
+
+    /**
+     * Delete contents of current hole, shifting hole to
+     * next element.
+     * @return Original contents of new hole.
+     */
+    public function delete() {
+        return empty($this->back) ? NULL : array_pop($this->back);
+    }
+
+    /**
+     * Returns true if we are at the end of the list.
+     * @return bool
+     */
+    public function done() {
+        return empty($this->back);
+    }
+
+    /**
+     * Insert element before hole.
+     * @param Element to insert
+     */
+    public function insertBefore($t) {
+        if ($t !== NULL) array_push($this->front, $t);
+    }
+
+    /**
+     * Insert element after hole.
+     * @param Element to insert
+     */
+    public function insertAfter($t) {
+        if ($t !== NULL) array_push($this->back, $t);
+    }
+
+    /**
+     * Splice in multiple elements at hole.  Functional specification
+     * in terms of array_splice:
+     *
+     *      $arr1 = $arr;
+     *      $old1 = array_splice($arr1, $i, $delete, $replacement);
+     *
+     *      list($z, $t) = HTMLPurifier_Zipper::fromArray($arr);
+     *      $t = $z->advance($t, $i);
+     *      list($old2, $t) = $z->splice($t, $delete, $replacement);
+     *      $arr2 = $z->toArray($t);
+     *
+     *      assert($old1 === $old2);
+     *      assert($arr1 === $arr2);
+     *
+     * NB: the absolute index location after this operation is
+     * *unchanged!*
+     *
+     * @param Current contents of hole.
+     */
+    public function splice($t, $delete, $replacement) {
+        // delete
+        $old = array();
+        $r = $t;
+        for ($i = $delete; $i > 0; $i--) {
+            $old[] = $r;
+            $r = $this->delete();
+        }
+        // insert
+        for ($i = count($replacement)-1; $i >= 0; $i--) {
+            $this->insertAfter($r);
+            $r = $replacement[$i];
+        }
+        return array($old, $r);
+    }
+}
diff --git a/library/ezyang/htmlpurifier/package.php b/library/ezyang/htmlpurifier/package.php
new file mode 100644
index 0000000000..bfef93622d
--- /dev/null
+++ b/library/ezyang/htmlpurifier/package.php
@@ -0,0 +1,61 @@
+<?php
+
+set_time_limit(0);
+
+require_once 'PEAR/PackageFileManager2.php';
+require_once 'PEAR/PackageFileManager/File.php';
+PEAR::setErrorHandling(PEAR_ERROR_PRINT);
+$pkg = new PEAR_PackageFileManager2;
+
+$pkg->setOptions(
+    array(
+        'baseinstalldir' => '/',
+        'packagefile' => 'package.xml',
+        'packagedirectory' => realpath(dirname(__FILE__) . '/library'),
+        'filelistgenerator' => 'file',
+        'include' => array('*'),
+        'dir_roles' => array('/' => 'php'), // hack to put *.ser files in the right place
+        'ignore' => array(
+            'HTMLPurifier.standalone.php',
+            'HTMLPurifier.path.php',
+            '*.tar.gz',
+            '*.tgz',
+            'standalone/'
+        ),
+    )
+);
+
+$pkg->setPackage('HTMLPurifier');
+$pkg->setLicense('LGPL', 'http://www.gnu.org/licenses/lgpl.html');
+$pkg->setSummary('Standards-compliant HTML filter');
+$pkg->setDescription(
+    'HTML Purifier is an HTML filter that will remove all malicious code
+    (better known as XSS) with a thoroughly audited, secure yet permissive
+    whitelist and will also make sure your documents are standards
+    compliant.'
+);
+
+$pkg->addMaintainer('lead', 'ezyang', 'Edward Z. Yang', 'admin@htmlpurifier.org', 'yes');
+
+$version = trim(file_get_contents('VERSION'));
+$api_version = substr($version, 0, strrpos($version, '.'));
+
+$pkg->setChannel('htmlpurifier.org');
+$pkg->setAPIVersion($api_version);
+$pkg->setAPIStability('stable');
+$pkg->setReleaseVersion($version);
+$pkg->setReleaseStability('stable');
+
+$pkg->addRelease();
+
+$pkg->setNotes(file_get_contents('WHATSNEW'));
+$pkg->setPackageType('php');
+
+$pkg->setPhpDep('5.0.0');
+$pkg->setPearinstallerDep('1.4.3');
+
+$pkg->generateContents();
+
+$pkg->writePackageFile();
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/phpdoc.ini b/library/ezyang/htmlpurifier/phpdoc.ini
new file mode 100644
index 0000000000..c4c3723538
--- /dev/null
+++ b/library/ezyang/htmlpurifier/phpdoc.ini
@@ -0,0 +1,102 @@
+;; phpDocumentor parse configuration file
+;;
+;; This file is designed to cut down on repetitive typing on the command-line or web interface
+;; You can copy this file to create a number of configuration files that can be used with the
+;; command-line switch -c, as in phpdoc -c default.ini or phpdoc -c myini.ini.  The web
+;; interface will automatically generate a list of .ini files that can be used.
+;;
+;; default.ini is used to generate the online manual at http://www.phpdoc.org/docs
+;;
+;; ALL .ini files must be in the user subdirectory of phpDocumentor with an extension of .ini
+;;
+;; Copyright 2002, Greg Beaver <cellog@users.sourceforge.net>
+;;
+;; WARNING: do not change the name of any command-line parameters, phpDocumentor will ignore them
+
+[Parse Data]
+;; title of all the documentation
+;; legal values: any string
+title = HTML Purifier API Documentation
+
+;; parse files that start with a . like .bash_profile
+;; legal values: true, false
+hidden = false
+
+;; show elements marked @access private in documentation by setting this to on
+;; legal values: on, off
+parseprivate = off
+
+;; parse with javadoc-like description (first sentence is always the short description)
+;; legal values: on, off
+javadocdesc = on
+
+;; add any custom @tags separated by commas here
+;; legal values: any legal tagname separated by commas.
+;customtags = mytag1,mytag2
+
+;; This is only used by the XML:DocBook/peardoc2 converter
+defaultcategoryname = Documentation
+
+;; what is the main package?
+;; legal values: alphanumeric string plus - and _
+defaultpackagename = HTMLPurifier
+
+;; output any parsing information?  set to on for cron jobs
+;; legal values: on
+;quiet = on
+
+;; parse a PEAR-style repository.  Do not turn this on if your project does
+;; not have a parent directory named "pear"
+;; legal values: on/off
+;pear = on
+
+;; where should the documentation be written?
+;; legal values: a legal path
+target = docs/phpdoc
+
+;; Which files should be parsed out as special documentation files, such as README,
+;; INSTALL and CHANGELOG?  This overrides the default files found in
+;; phpDocumentor.ini (this file is not a user .ini file, but the global file)
+readmeinstallchangelog = README, INSTALL, NEWS, WYSIWYG, SLOW, LICENSE, CREDITS
+
+;; limit output to the specified packages, even if others are parsed
+;; legal values: package names separated by commas
+;packageoutput = package1,package2
+
+;; comma-separated list of files to parse
+;; legal values: paths separated by commas
+;filename = /path/to/file1,/path/to/file2,fileincurrentdirectory
+
+;; comma-separated list of directories to parse
+;; legal values: directory paths separated by commas
+;directory = /path1,/path2,.,..,subdirectory
+;directory = /home/jeichorn/cvs/pear
+directory = .
+
+;; template base directory (the equivalent directory of <installdir>/phpDocumentor)
+;templatebase = /path/to/my/templates
+
+;; directory to find any example files in through @example and {@example} tags
+;examplesdir = /path/to/my/templates
+
+;; comma-separated list of files, directories or wildcards ? and * (any wildcard) to ignore
+;; legal values: any wildcard strings separated by commas
+;ignore = /path/to/ignore*,*list.php,myfile.php,subdirectory/
+ignore = *tests*,*benchmarks*,*docs*,*test-settings.php,*configdoc*,*maintenance*,*smoketests*,*standalone*,*.svn*,*conf*
+
+sourcecode = on
+
+;; comma-separated list of Converters to use in outputformat:Convertername:templatedirectory format
+;; legal values: HTML:frames:default,HTML:frames:l0l33t,HTML:frames:phpdoc.de,HTML:frames:phphtmllib,
+;;               HTML:frames:earthli,
+;;               HTML:frames:DOM/default,HTML:frames:DOM/l0l33t,HTML:frames:DOM/phpdoc.de,
+;;               HTML:frames:DOM/phphtmllib,HTML:frames:DOM/earthli
+;;               HTML:Smarty:default,HTML:Smarty:PHP,HTML:Smarty:HandS
+;;               PDF:default:default,CHM:default:default,XML:DocBook/peardoc2:default
+output=HTML:frames:default
+
+;; turn this option on if you want highlighted source code for every file
+;; legal values: on/off
+sourcecode = on
+
+; vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/modx.txt b/library/ezyang/htmlpurifier/plugins/modx.txt
new file mode 100644
index 0000000000..0763821b50
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/modx.txt
@@ -0,0 +1,112 @@
+
+MODx Plugin
+
+MODx <http://www.modxcms.com/> is an open source PHP application framework.
+I first came across them in my referrer logs when tillda asked if anyone
+could implement an HTML Purifier plugin.  This forum thread
+<http://modxcms.com/forums/index.php/topic,6604.0.html> eventually resulted
+in the fruition of this plugin that davidm says, "is on top of my favorite
+list."  HTML Purifier goes great with WYSIWYG editors!
+
+
+
+1. Credits
+
+PaulGregory wrote the overall structure of the code.  I added the
+slashes hack.
+
+
+
+2. Install
+
+First, you need to place HTML Purifier library somewhere.  The code here
+assumes that you've placed in MODx's assets/plugins/htmlpurifier (no version
+number).
+
+Log into the manager, and navigate:
+
+Resources > Manage Resources > Plugins tab > New Plugin
+
+Type in a name (probably HTML Purifier), and copy paste this code into the
+textarea:
+
+--------------------------------------------------------------------------------
+$e = &$modx->Event;
+if ($e->name == 'OnBeforeDocFormSave') {
+    global $content;
+
+    include_once '../assets/plugins/htmlpurifier/library/HTMLPurifier.auto.php';
+    $purifier = new HTMLPurifier();
+
+    static $magic_quotes = null;
+    if ($magic_quotes === null) {
+        // this is an ugly hack because this hook hasn't
+        // had the backslashes removed yet when magic_quotes_gpc is on,
+        // but HTMLPurifier must not have the quotes slashed.
+        $magic_quotes = get_magic_quotes_gpc();
+    }
+
+    if ($magic_quotes) $content = stripslashes($content);
+    $content = $purifier->purify($content);
+    if ($magic_quotes) $content = addslashes($content);
+}
+--------------------------------------------------------------------------------
+
+Then navigate to the System Events tab and check "OnBeforeDocFormSave".
+Save the plugin.  HTML Purifier now is integrated!
+
+
+
+3. Making sure it works
+
+You can test HTML Purifier by deliberately putting in crappy HTML and seeing
+whether or not it gets fixed.  A better way is to put in something like this:
+
+<p lang="fr">Il est bon</p>
+
+...and seeing whether or not the content comes out as:
+
+<p lang="fr" xml:lang="fr">Il est bon</p>
+
+(lang to xml:lang synchronization is one of the many features HTML Purifier
+has).
+
+
+
+4. Caveat Emptor
+
+This code does not intercept save requests from the QuickEdit plugin, this may
+be added in a later version.  It also modifies things on save, so there's a
+slight chance that HTML Purifier may make a boo-boo and accidently mess things
+up (the original version is not saved).
+
+Finally, make sure that MODx is using UTF-8.  If you are using, say, a French
+localisation, you may be using Latin-1, if that's the case, configure
+HTML Purifier properly like this:
+
+$config = HTMLPurifier_Config::createDefault();
+$config->set('Core', 'Encoding', 'ISO-8859-1'); // or whatever encoding
+$purifier = new HTMLPurifier($config);
+
+
+
+5. Known Bugs
+
+'rn' characters sometimes mysteriously appear after purification. We are
+currently investigating this issue. See: <http://htmlpurifier.org/phorum/read.php?3,1866>
+
+
+
+6. See Also
+
+A modified version of Jot 1.1.3 is available, which integrates with HTML
+Purifier. You can check it out here: <http://modxcms.com/forums/index.php/topic,25621.msg161970.html>
+
+
+X. Changelog
+
+2008-06-16
+- Updated code to work with 3.1.0 and later
+- Add Known Bugs and See Also section
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/.gitignore b/library/ezyang/htmlpurifier/plugins/phorum/.gitignore
new file mode 100644
index 0000000000..8325e09020
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/.gitignore
@@ -0,0 +1,2 @@
+migrate.php
+htmlpurifier/*
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/Changelog b/library/ezyang/htmlpurifier/plugins/phorum/Changelog
new file mode 100644
index 0000000000..9f939e54ae
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/Changelog
@@ -0,0 +1,27 @@
+Changelog                                         HTMLPurifier : Phorum Mod
+|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
+= KEY ====================
+    # Breaks back-compat
+    ! Feature
+    - Bugfix
+      + Sub-comment
+    . Internal change
+==========================
+
+Version 4.0.0 for Phorum 5.2, released July 9, 2009
+# Works only with HTML Purifier 4.0.0
+! Better installation documentation
+- Fixed double encoded quotes
+- Fixed fatal error when migrate.php is blank
+
+Version 3.0.0 for Phorum 5.2, released January 12, 2008
+# WYSIWYG and suppress_message options are now configurable via web
+  interface.
+- Module now compatible with Phorum 5.2, primary bugs were in migration
+  code as well as signature and edit message handling. This module is NOT
+  compatible with Phorum 5.1.
+- Buggy WYSIWYG mode refined
+. AutoFormatParam added to list of default configuration namespaces
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/INSTALL b/library/ezyang/htmlpurifier/plugins/phorum/INSTALL
new file mode 100644
index 0000000000..23c76fc5c6
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/INSTALL
@@ -0,0 +1,84 @@
+
+Install
+    How to install the Phorum HTML Purifier plugin
+
+0. PREREQUISITES
+----------------
+This Phorum module only works on PHP5 and with HTML Purifier 4.0.0
+or later.
+
+1. UNZIP
+--------
+Unzip phorum-htmlpurifier-x.y.z, producing an htmlpurifier folder.
+You've already done this step if you're reading this!
+
+2. MOVE
+-------
+Move the htmlpurifier folder to the mods/ folder of your Phorum
+installation, so the directory structure looks like:
+
+phorum/
+    mods/
+        htmlpurifier/
+            INSTALL - this install file
+            info.txt, ... - the module files
+            htmlpurifier/
+
+3. INSTALL HTML PURIFIER
+------------------------
+Download and unzip HTML Purifier <htmlpurifier.org>. Place the contents of
+the library/ folder in the htmlpurifier/htmlpurifier folder. Your directory
+structure will look like:
+
+phorum/
+    mods/
+        htmlpurifier/
+            htmlpurifier/
+                HTMLPurifier.auto.php
+                ... - other files
+                HTMLPurifier/
+
+Advanced users:
+    If you have HTML Purifier installed elsewhere on your server,
+    all you need is an HTMLPurifier.auto.php file in the library folder which
+    includes the HTMLPurifier.auto.php file in your install.
+
+4. MIGRATE
+----------
+If you're setting up a new Phorum installation, all you need to do is create
+a blank migrate.php file in the htmlpurifier module folder (NOT the library
+folder.
+
+If you have an old Phorum installation and was using BBCode,
+copy migrate.bbcode.php to migrate.php. If you were using a different input
+format, follow the instructions in migrate.bbcode.php to create your own custom
+migrate.php file.
+
+Your directory structure should now look like this:
+
+phorum/
+    mods/
+        htmlpurifier/
+            migrate.php
+
+5. ENABLE
+---------
+Navigate to your Phorum admin panel at http://example.com/phorum/admin.php,
+click on Global Settings > Modules, scroll to "HTML Purifier Phorum Mod" and
+turn it On.
+
+6. MIGRATE SIGNATURES
+---------------------
+If you're setting up a new Phorum installation, skip this step.
+
+If you allowed your users to make signatures, navigate to the module settings
+page of HTML Purifier (Global Settings > Modules > HTML Purifier Phorum Mod >
+Configure), type in "yes" in the "Confirm" box, and press "Migrate."
+
+ONLY DO THIS ONCE! BE SURE TO BACK UP YOUR DATABASE!
+
+7. CONFIGURE
+------------
+Configure using Edit settings. See that page for more information.
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/README b/library/ezyang/htmlpurifier/plugins/phorum/README
new file mode 100644
index 0000000000..0524ed39db
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/README
@@ -0,0 +1,45 @@
+
+HTML Purifier Phorum Mod - Filter your HTML the Standards-Compliant Way!
+
+This Phorum mod enables HTML posting on Phorum.  Under normal circumstances,
+this would cause a huge security risk, but because we are running
+HTML through HTML Purifier, output is guaranteed to be XSS free and
+standards-compliant.
+
+This mod requires HTML input, and previous markup languages need to be
+converted accordingly.  Thus, it is vital that you create a 'migrate.php'
+file that works with your installation. If you're using the built-in
+BBCode formatting, simply move migrate.bbcode.php to that place; for
+other markup languages, consult said file for instructions on how
+to adapt it to your needs.
+
+    -- NOTE -------------------------------------------------
+    You can also run this module in parallel with another
+    formatting module; this module attempts to place itself
+    at the end of the filtering chain. However, if any
+    previous modules produce insecure HTML (for instance,
+    a JavaScript email obfuscator) they will get cleaned.
+
+This module will not work if 'migrate.php' is not created, and an improperly
+made migration file may *CORRUPT* Phorum, so please take your time to
+do this correctly. It should go without saying to *BACKUP YOUR DATABASE*
+before attempting anything here. If no migration is necessary, you can
+simply create a blank migrate.php file. HTML Purifier is smart and will
+not re-migrate already processed messages. However, the original code
+is irretrievably lost (we may change this in the future.)
+
+This module will not automatically migrate user signatures, because this
+process may take a long time. After installing the HTML Purifier module and
+then configuring 'migrate.php', navigate to Settings and click 'Migrate
+Signatures' to migrate all user signatures to HTML.
+
+All of HTML Purifier's usual functions are configurable via the mod settings
+page. If you require custom configuration, create config.php file in
+the mod directory that edits a $config variable. Be sure, also, to
+set $PHORUM['mod_htmlpurifier']['wysiwyg'] to TRUE if you are using a
+WYSIWYG editor (you can do this through a common hook or the web
+configuration form).
+
+Visit HTML Purifier at <http://htmlpurifier.org/>.
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/config.default.php b/library/ezyang/htmlpurifier/plugins/phorum/config.default.php
new file mode 100644
index 0000000000..e047c0b423
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/config.default.php
@@ -0,0 +1,57 @@
+<?php
+
+if(!defined("PHORUM")) exit;
+
+// default HTML Purifier configuration settings
+$config->set('HTML.Allowed',
+  // alphabetically sorted
+'a[href|title]
+abbr[title]
+acronym[title]
+b
+blockquote[cite]
+br
+caption
+cite
+code
+dd
+del
+dfn
+div
+dl
+dt
+em
+i
+img[src|alt|title|class]
+ins
+kbd
+li
+ol
+p
+pre
+s
+strike
+strong
+sub
+sup
+table
+tbody
+td
+tfoot
+th
+thead
+tr
+tt
+u
+ul
+var');
+$config->set('AutoFormat.AutoParagraph', true);
+$config->set('AutoFormat.Linkify', true);
+$config->set('HTML.Doctype', 'XHTML 1.0 Transitional');
+$config->set('Core.AggressivelyFixLt', true);
+$config->set('Core.Encoding', $GLOBALS['PHORUM']['DATA']['CHARSET']); // we'll change this eventually
+if (strtolower($GLOBALS['PHORUM']['DATA']['CHARSET']) !== 'utf-8') {
+  $config->set('Core.EscapeNonASCIICharacters', true);
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/htmlpurifier.php b/library/ezyang/htmlpurifier/plugins/phorum/htmlpurifier.php
new file mode 100644
index 0000000000..f66d8c36cd
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/htmlpurifier.php
@@ -0,0 +1,316 @@
+<?php
+
+/**
+ * HTML Purifier Phorum Mod. Filter your HTML the Standards-Compliant Way!
+ *
+ * This Phorum mod enables users to post raw HTML into Phorum.  But never
+ * fear: with the help of HTML Purifier, this HTML will be beat into
+ * de-XSSed and standards-compliant form, safe for general consumption.
+ * It is not recommended, but possible to run this mod in parallel
+ * with other formatters (in short, please DISABLE the BBcode mod).
+ *
+ * For help migrating from your previous markup language to pure HTML
+ * please check the migrate.bbcode.php file.
+ *
+ * If you'd like to use this with a WYSIWYG editor, make sure that
+ * editor sets $PHORUM['mod_htmlpurifier']['wysiwyg'] to true. Otherwise,
+ * administrators who need to edit other people's comments may be at
+ * risk for some nasty attacks.
+ *
+ * Tested with Phorum 5.2.11.
+ */
+
+// Note: Cache data is base64 encoded because Phorum insists on flinging
+// to the user and expecting it to come back unharmed, newlines and
+// all, which ain't happening. It's slower, it takes up more space, but
+// at least it won't get mutilated
+
+/**
+ * Purifies a data array
+ */
+function phorum_htmlpurifier_format($data)
+{
+    $PHORUM = $GLOBALS["PHORUM"];
+
+    $purifier =& HTMLPurifier::getInstance();
+    $cache_serial = $PHORUM['mod_htmlpurifier']['body_cache_serial'];
+
+    foreach($data as $message_id => $message){
+        if(isset($message['body'])) {
+
+            if ($message_id) {
+                // we're dealing with a real message, not a fake, so
+                // there a number of shortcuts that can be taken
+
+                if (isset($message['meta']['htmlpurifier_light'])) {
+                    // format hook was called outside of Phorum's normal
+                    // functions, do the abridged purification
+                    $data[$message_id]['body'] = $purifier->purify($message['body']);
+                    continue;
+                }
+
+                if (!empty($PHORUM['args']['purge'])) {
+                    // purge the cache, must be below the following if
+                    unset($message['meta']['body_cache']);
+                }
+
+                if (
+                    isset($message['meta']['body_cache']) &&
+                    isset($message['meta']['body_cache_serial']) &&
+                    $message['meta']['body_cache_serial'] == $cache_serial
+                ) {
+                    // cached version is present, bail out early
+                    $data[$message_id]['body'] = base64_decode($message['meta']['body_cache']);
+                    continue;
+                }
+            }
+
+            // migration might edit this array, that's why it's defined
+            // so early
+            $updated_message = array();
+
+            // create the $body variable
+            if (
+                $message_id && // message must be real to migrate
+                !isset($message['meta']['body_cache_serial'])
+            ) {
+                // perform migration
+                $fake_data = array();
+                list($signature, $edit_message) = phorum_htmlpurifier_remove_sig_and_editmessage($message);
+                $fake_data[$message_id] = $message;
+                $fake_data = phorum_htmlpurifier_migrate($fake_data);
+                $body = $fake_data[$message_id]['body'];
+                $body = str_replace("<phorum break>\n", "\n", $body);
+                $updated_message['body'] = $body; // save it in
+                $body .= $signature . $edit_message; // add it back in
+            } else {
+                // reverse Phorum's pre-processing
+                $body = $message['body'];
+                // order is important
+                $body = str_replace("<phorum break>\n", "\n", $body);
+                $body = str_replace(array('&lt;','&gt;','&amp;', '&quot;'), array('<','>','&','"'), $body);
+                if (!$message_id && defined('PHORUM_CONTROL_CENTER')) {
+                    // we're in control.php, so it was double-escaped
+                    $body = str_replace(array('&lt;','&gt;','&amp;', '&quot;'), array('<','>','&','"'), $body);
+                }
+            }
+
+            $body = $purifier->purify($body);
+
+            // dynamically update the cache (MUST BE DONE HERE!)
+            // this is inefficient because it's one db call per
+            // cache miss, but once the cache is in place things are
+            // a lot zippier.
+
+            if ($message_id) { // make sure it's not a fake id
+                $updated_message['meta'] = $message['meta'];
+                $updated_message['meta']['body_cache'] = base64_encode($body);
+                $updated_message['meta']['body_cache_serial'] = $cache_serial;
+                phorum_db_update_message($message_id, $updated_message);
+            }
+
+            // must not get overloaded until after we cache it, otherwise
+            // we'll inadvertently change the original text
+            $data[$message_id]['body'] = $body;
+
+        }
+    }
+
+    return $data;
+}
+
+// -----------------------------------------------------------------------
+// This is fragile code, copied from read.php:596 (Phorum 5.2.6). Please
+// keep this code in-sync with Phorum
+
+/**
+ * Generates a signature based on a message array
+ */
+function phorum_htmlpurifier_generate_sig($row)
+{
+    $phorum_sig = '';
+    if(isset($row["user"]["signature"])
+       && isset($row['meta']['show_signature']) && $row['meta']['show_signature']==1){
+           $phorum_sig=trim($row["user"]["signature"]);
+           if(!empty($phorum_sig)){
+               $phorum_sig="\n\n$phorum_sig";
+           }
+    }
+    return $phorum_sig;
+}
+
+/**
+ * Generates an edit message based on a message array
+ */
+function phorum_htmlpurifier_generate_editmessage($row)
+{
+    $PHORUM = $GLOBALS['PHORUM'];
+    $editmessage = '';
+    if(isset($row['meta']['edit_count']) && $row['meta']['edit_count'] > 0) {
+        $editmessage = str_replace ("%count%", $row['meta']['edit_count'], $PHORUM["DATA"]["LANG"]["EditedMessage"]);
+        $editmessage = str_replace ("%lastedit%", phorum_date($PHORUM["short_date_time"],$row['meta']['edit_date']),  $editmessage);
+        $editmessage = str_replace ("%lastuser%", $row['meta']['edit_username'],  $editmessage);
+        $editmessage = "\n\n\n\n$editmessage";
+    }
+    return $editmessage;
+}
+
+// End fragile code
+// -----------------------------------------------------------------------
+
+/**
+ * Removes the signature and edit message from a message
+ * @param $row Message passed by reference
+ */
+function phorum_htmlpurifier_remove_sig_and_editmessage(&$row)
+{
+    $signature = phorum_htmlpurifier_generate_sig($row);
+    $editmessage = phorum_htmlpurifier_generate_editmessage($row);
+    $replacements = array();
+    // we need to remove add <phorum break> as that is the form these
+    // extra bits are in.
+    if ($signature) $replacements[str_replace("\n", "<phorum break>\n", $signature)] = '';
+    if ($editmessage) $replacements[str_replace("\n", "<phorum break>\n", $editmessage)] = '';
+    $row['body'] = strtr($row['body'], $replacements);
+    return array($signature, $editmessage);
+}
+
+/**
+ * Indicate that data is fully HTML and not from migration, invalidate
+ * previous caches
+ * @note This function could generate the actual cache entries, but
+ *       since there's data missing that must be deferred to the first read
+ */
+function phorum_htmlpurifier_posting($message)
+{
+    $PHORUM = $GLOBALS["PHORUM"];
+    unset($message['meta']['body_cache']); // invalidate the cache
+    $message['meta']['body_cache_serial'] = $PHORUM['mod_htmlpurifier']['body_cache_serial'];
+    return $message;
+}
+
+/**
+ * Overload quoting mechanism to prevent default, mail-style quote from happening
+ */
+function phorum_htmlpurifier_quote($array)
+{
+    $PHORUM = $GLOBALS["PHORUM"];
+    $purifier =& HTMLPurifier::getInstance();
+    $text = $purifier->purify($array[1]);
+    $source = htmlspecialchars($array[0]);
+    return "<blockquote cite=\"$source\">\n$text\n</blockquote>";
+}
+
+/**
+ * Ensure that our format hook is processed last. Also, loads the library.
+ * @credits <http://secretsauce.phorum.org/snippets/make_bbcode_last_formatter.php.txt>
+ */
+function phorum_htmlpurifier_common()
+{
+    require_once(dirname(__FILE__).'/htmlpurifier/HTMLPurifier.auto.php');
+    require(dirname(__FILE__).'/init-config.php');
+
+    $config = phorum_htmlpurifier_get_config();
+    HTMLPurifier::getInstance($config);
+
+    // increment revision.txt if you want to invalidate the cache
+    $GLOBALS['PHORUM']['mod_htmlpurifier']['body_cache_serial'] = $config->getSerial();
+
+    // load migration
+    if (file_exists(dirname(__FILE__) . '/migrate.php')) {
+        include(dirname(__FILE__) . '/migrate.php');
+    } else {
+        echo '<strong>Error:</strong> No migration path specified for HTML Purifier, please check
+        <tt>modes/htmlpurifier/migrate.bbcode.php</tt> for instructions on
+        how to migrate from your previous markup language.';
+        exit;
+    }
+
+    if (!function_exists('phorum_htmlpurifier_migrate')) {
+        // Dummy function
+        function phorum_htmlpurifier_migrate($data) {return $data;}
+    }
+
+}
+
+/**
+ * Pre-emptively performs purification if it looks like a WYSIWYG editor
+ * is being used
+ */
+function phorum_htmlpurifier_before_editor($message)
+{
+    if (!empty($GLOBALS['PHORUM']['mod_htmlpurifier']['wysiwyg'])) {
+        if (!empty($message['body'])) {
+            $body = $message['body'];
+            // de-entity-ize contents
+            $body = str_replace(array('&lt;','&gt;','&amp;'), array('<','>','&'), $body);
+            $purifier =& HTMLPurifier::getInstance();
+            $body = $purifier->purify($body);
+            // re-entity-ize contents
+            $body = htmlspecialchars($body, ENT_QUOTES, $GLOBALS['PHORUM']['DATA']['CHARSET']);
+            $message['body'] = $body;
+        }
+    }
+    return $message;
+}
+
+function phorum_htmlpurifier_editor_after_subject()
+{
+    // don't show this message if it's a WYSIWYG editor, since it will
+    // then be handled automatically
+    if (!empty($GLOBALS['PHORUM']['mod_htmlpurifier']['wysiwyg'])) {
+        $i = $GLOBALS['PHORUM']['DATA']['MODE'];
+        if ($i == 'quote' || $i == 'edit' || $i == 'moderation') {
+          ?>
+          <div>
+            <p>
+              <strong>Notice:</strong> HTML has been scrubbed for your safety.
+              If you would like to see the original, turn off WYSIWYG mode
+              (consult your administrator for details.)
+            </p>
+          </div>
+          <?php
+        }
+        return;
+    }
+    if (!empty($GLOBALS['PHORUM']['mod_htmlpurifier']['suppress_message'])) return;
+    ?><div class="htmlpurifier-help">
+    <p>
+        <strong>HTML input</strong> is enabled. Make sure you escape all HTML and
+        angled brackets with <code>&amp;lt;</code> and <code>&amp;gt;</code>.
+    </p><?php
+            $purifier =& HTMLPurifier::getInstance();
+            $config = $purifier->config;
+            if ($config->get('AutoFormat.AutoParagraph')) {
+                ?><p>
+                    <strong>Auto-paragraphing</strong> is enabled. Double
+                    newlines will be converted to paragraphs; for single
+                    newlines, use the <code>pre</code> tag.
+                </p><?php
+            }
+            $html_definition = $config->getDefinition('HTML');
+            $allowed = array();
+            foreach ($html_definition->info as $name => $x) $allowed[] = "<code>$name</code>";
+            sort($allowed);
+            $allowed_text = implode(', ', $allowed);
+            ?><p><strong>Allowed tags:</strong> <?php
+            echo $allowed_text;
+            ?>.</p><?php
+        ?>
+    </p>
+    <p>
+        For inputting literal code such as HTML and PHP for display, use
+        CDATA tags to auto-escape your angled brackets, and <code>pre</code>
+        to preserve newlines:
+    </p>
+    <pre>&lt;pre&gt;&lt;![CDATA[
+<em>Place code here</em>
+]]&gt;&lt;/pre&gt;</pre>
+    <p>
+        Power users, you can hide this notice with:
+        <pre>.htmlpurifier-help {display:none;}</pre>
+    </p>
+    </div><?php
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/info.txt b/library/ezyang/htmlpurifier/plugins/phorum/info.txt
new file mode 100644
index 0000000000..7234654901
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/info.txt
@@ -0,0 +1,18 @@
+title:   HTML Purifier Phorum Mod
+desc:    This module enables standards-compliant HTML filtering on Phorum. Please check migrate.bbcode.php before enabling this mod.
+author:  Edward Z. Yang
+url:     http://htmlpurifier.org/
+version: 4.0.0
+
+hook:  format|phorum_htmlpurifier_format
+hook:  quote|phorum_htmlpurifier_quote
+hook:  posting_custom_action|phorum_htmlpurifier_posting
+hook:  common|phorum_htmlpurifier_common
+hook:  before_editor|phorum_htmlpurifier_before_editor
+hook:  tpl_editor_after_subject|phorum_htmlpurifier_editor_after_subject
+
+# This module is meant to be a drop-in for bbcode, so make it run last.
+priority: run module after *
+priority: run hook format after *
+
+    vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/init-config.php b/library/ezyang/htmlpurifier/plugins/phorum/init-config.php
new file mode 100644
index 0000000000..e19787b4bc
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/init-config.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * Initializes the appropriate configuration from either a PHP file
+ * or a module configuration value
+ * @return Instance of HTMLPurifier_Config
+ */
+function phorum_htmlpurifier_get_config($default = false)
+{
+    global $PHORUM;
+    $config_exists = phorum_htmlpurifier_config_file_exists();
+    if ($default || $config_exists || !isset($PHORUM['mod_htmlpurifier']['config'])) {
+        $config = HTMLPurifier_Config::createDefault();
+        include(dirname(__FILE__) . '/config.default.php');
+        if ($config_exists) {
+            include(dirname(__FILE__) . '/config.php');
+        }
+        unset($PHORUM['mod_htmlpurifier']['config']); // unnecessary
+    } else {
+        $config = HTMLPurifier_Config::create($PHORUM['mod_htmlpurifier']['config']);
+    }
+    return $config;
+}
+
+function phorum_htmlpurifier_config_file_exists()
+{
+    return file_exists(dirname(__FILE__) . '/config.php');
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/migrate.bbcode.php b/library/ezyang/htmlpurifier/plugins/phorum/migrate.bbcode.php
new file mode 100644
index 0000000000..0d09194556
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/migrate.bbcode.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * This file is responsible for migrating from a specific markup language
+ * like BBCode or Markdown to HTML. WARNING: THIS PROCESS IS NOT REVERSIBLE
+ *
+ * Copy this file to 'migrate.php' and it will automatically work for
+ * BBCode; you may need to tweak this a little to get it to work for other
+ * languages (usually, just replace the include name and the function name).
+ *
+ * If you do NOT want to have any migration performed (for instance, you
+ * are installing the module on a new forum with no posts), simply remove
+ * phorum_htmlpurifier_migrate() function. You still need migrate.php
+ * present, otherwise the module won't work. This ensures that the user
+ * explicitly says, "No, I do not need to migrate."
+ */
+
+if(!defined("PHORUM")) exit;
+
+require_once(dirname(__FILE__) . "/../bbcode/bbcode.php");
+
+/**
+ * 'format' hook style function that will be called to convert
+ * legacy markup into HTML.
+ */
+function phorum_htmlpurifier_migrate($data)
+{
+    return phorum_mod_bbcode_format($data); // bbcode's 'format' hook
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/settings.php b/library/ezyang/htmlpurifier/plugins/phorum/settings.php
new file mode 100644
index 0000000000..8158f02823
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/settings.php
@@ -0,0 +1,64 @@
+<?php
+
+// based off of BBCode's settings file
+
+/**
+ * HTML Purifier Phorum mod settings configuration. This provides
+ * a convenient web-interface for editing the most common HTML Purifier
+ * configuration directives. You can also specify custom configuration
+ * by creating a 'config.php' file.
+ */
+
+if(!defined("PHORUM_ADMIN")) exit;
+
+// error reporting is good!
+error_reporting(E_ALL ^ E_NOTICE);
+
+// load library and other paraphenalia
+require_once './include/admin/PhorumInputForm.php';
+require_once (dirname(__FILE__) . '/htmlpurifier/HTMLPurifier.auto.php');
+require_once (dirname(__FILE__) . '/init-config.php');
+require_once (dirname(__FILE__) . '/settings/migrate-sigs-form.php');
+require_once (dirname(__FILE__) . '/settings/migrate-sigs.php');
+require_once (dirname(__FILE__) . '/settings/form.php');
+require_once (dirname(__FILE__) . '/settings/save.php');
+
+// define friendly configuration directives. you can expand this array
+// to get more web-definable directives
+$PHORUM['mod_htmlpurifier']['directives'] = array(
+    'URI.Host', // auto-detectable
+    'URI.DisableExternal',
+    'URI.DisableExternalResources',
+    'URI.DisableResources',
+    'URI.Munge',
+    'URI.HostBlacklist',
+    'URI.Disable',
+    'HTML.TidyLevel',
+    'HTML.Doctype', // auto-detectable
+    'HTML.Allowed',
+    'AutoFormat',
+    '-AutoFormat.Custom',
+    'AutoFormatParam',
+    'Output.TidyFormat',
+);
+
+// lower this setting if you're getting time outs/out of memory
+$PHORUM['mod_htmlpurifier']['migrate-sigs-increment'] = 100;
+
+if (isset($_POST['reset'])) {
+    unset($PHORUM['mod_htmlpurifier']['config']);
+}
+
+if ($offset = phorum_htmlpurifier_migrate_sigs_check()) {
+    // migrate signatures
+    phorum_htmlpurifier_migrate_sigs($offset);
+} elseif(!empty($_POST)){
+    // save settings
+    phorum_htmlpurifier_save_settings();
+}
+
+phorum_htmlpurifier_show_migrate_sigs_form();
+echo '<br />';
+phorum_htmlpurifier_show_form();
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/settings/form.php b/library/ezyang/htmlpurifier/plugins/phorum/settings/form.php
new file mode 100644
index 0000000000..9b6ad5f39e
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/settings/form.php
@@ -0,0 +1,95 @@
+<?php
+
+function phorum_htmlpurifier_show_form()
+{
+    if (phorum_htmlpurifier_config_file_exists()) {
+        phorum_htmlpurifier_show_config_info();
+        return;
+    }
+
+    global $PHORUM;
+
+    $config = phorum_htmlpurifier_get_config();
+
+    $frm = new PhorumInputForm ("", "post", "Save");
+    $frm->hidden("module", "modsettings");
+    $frm->hidden("mod", "htmlpurifier"); // this is the directory name that the Settings file lives in
+
+    if (!empty($error)){
+        echo "$error<br />";
+    }
+
+    $frm->addbreak("Edit settings for the HTML Purifier module");
+
+    $frm->addMessage('<p>The box below sets <code>$PHORUM[\'mod_htmlpurifier\'][\'wysiwyg\']</code>.
+    When checked, contents sent for edit are now purified and the
+    informative message is disabled. If your WYSIWYG editor is disabled for
+    admin edits, you can safely keep this unchecked.</p>');
+    $frm->addRow('Use WYSIWYG?', $frm->checkbox('wysiwyg', '1', '', $PHORUM['mod_htmlpurifier']['wysiwyg']));
+
+    $frm->addMessage('<p>The box below sets <code>$PHORUM[\'mod_htmlpurifier\'][\'suppress_message\']</code>,
+    which removes the big how-to use
+    HTML Purifier message.</p>');
+    $frm->addRow('Suppress information?', $frm->checkbox('suppress_message', '1', '', $PHORUM['mod_htmlpurifier']['suppress_message']));
+
+    $frm->addMessage('<p>Click on directive links to read what each option does
+    (links do not open in new windows).</p>
+    <p>For more flexibility (for instance, you want to edit the full
+    range of configuration directives), you can create a <tt>config.php</tt>
+    file in your <tt>mods/htmlpurifier/</tt> directory. Doing so will,
+    however, make the web configuration interface unavailable.</p>');
+
+    require_once 'HTMLPurifier/Printer/ConfigForm.php';
+    $htmlpurifier_form = new HTMLPurifier_Printer_ConfigForm('config', 'http://htmlpurifier.org/live/configdoc/plain.html#%s');
+    $htmlpurifier_form->setTextareaDimensions(23, 7); // widen a little, since we have space
+
+    $frm->addMessage($htmlpurifier_form->render(
+        $config, $PHORUM['mod_htmlpurifier']['directives'], false));
+
+    $frm->addMessage("<strong>Warning: Changing HTML Purifier's configuration will invalidate
+      the cache. Expect to see a flurry of database activity after you change
+      any of these settings.</strong>");
+
+    $frm->addrow('Reset to defaults:', $frm->checkbox("reset", "1", "", false));
+
+    // hack to include extra styling
+    echo '<style type="text/css">' . $htmlpurifier_form->getCSS() . '
+    .hp-config {margin-left:auto;margin-right:auto;}
+    </style>';
+    $js = $htmlpurifier_form->getJavaScript();
+    echo '<script type="text/javascript">'."<!--\n$js\n//-->".'</script>';
+
+    $frm->show();
+}
+
+function phorum_htmlpurifier_show_config_info()
+{
+    global $PHORUM;
+
+    // update mod_htmlpurifier for housekeeping
+    phorum_htmlpurifier_commit_settings();
+
+    // politely tell user how to edit settings manually
+?>
+        <div class="input-form-td-break">How to edit settings for HTML Purifier module</div>
+        <p>
+          A <tt>config.php</tt> file exists in your <tt>mods/htmlpurifier/</tt>
+          directory. This file contains your custom configuration: in order to
+          change it, please navigate to that file and edit it accordingly.
+          You can also set <code>$GLOBALS['PHORUM']['mod_htmlpurifier']['wysiwyg']</code>
+          or <code>$GLOBALS['PHORUM']['mod_htmlpurifier']['suppress_message']</code>
+        </p>
+        <p>
+          To use the web interface, delete <tt>config.php</tt> (or rename it to
+          <tt>config.php.bak</tt>).
+        </p>
+        <p>
+          <strong>Warning: Changing HTML Purifier's configuration will invalidate
+          the cache. Expect to see a flurry of database activity after you change
+          any of these settings.</strong>
+        </p>
+<?php
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs-form.php b/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs-form.php
new file mode 100644
index 0000000000..abea3b51d7
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs-form.php
@@ -0,0 +1,22 @@
+<?php
+
+function phorum_htmlpurifier_show_migrate_sigs_form()
+{
+    $frm = new PhorumInputForm ('', "post", "Migrate");
+    $frm->hidden("module", "modsettings");
+    $frm->hidden("mod", "htmlpurifier");
+    $frm->hidden("migrate-sigs", "1");
+    $frm->addbreak("Migrate user signatures to HTML");
+    $frm->addMessage('This operation will migrate your users signatures
+        to HTML. <strong>This process is irreversible and must only be performed once.</strong>
+        Type in yes in the confirmation field to migrate.');
+    if (!file_exists(dirname(__FILE__) . '/../migrate.php')) {
+        $frm->addMessage('Migration file does not exist, cannot migrate signatures.
+            Please check <tt>migrate.bbcode.php</tt> on how to create an appropriate file.');
+    } else {
+        $frm->addrow('Confirm:', $frm->text_box("confirmation", ""));
+    }
+    $frm->show();
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs.php b/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs.php
new file mode 100644
index 0000000000..5ea9cd0b81
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/settings/migrate-sigs.php
@@ -0,0 +1,79 @@
+<?php
+
+function phorum_htmlpurifier_migrate_sigs_check()
+{
+    global $PHORUM;
+    $offset = 0;
+    if (!empty($_POST['migrate-sigs'])) {
+        if (!isset($_POST['confirmation']) || strtolower($_POST['confirmation']) !== 'yes') {
+            echo 'Invalid confirmation code.';
+            exit;
+        }
+        $PHORUM['mod_htmlpurifier']['migrate-sigs'] = true;
+        phorum_db_update_settings(array("mod_htmlpurifier"=>$PHORUM["mod_htmlpurifier"]));
+        $offset = 1;
+    } elseif (!empty($_GET['migrate-sigs']) && $PHORUM['mod_htmlpurifier']['migrate-sigs']) {
+        $offset = (int) $_GET['migrate-sigs'];
+    }
+    return $offset;
+}
+
+function phorum_htmlpurifier_migrate_sigs($offset)
+{
+    global $PHORUM;
+
+    if(!$offset) return; // bail out quick if $offset == 0
+
+    // theoretically, we could get rid of this multi-request
+    // doo-hickery if safe mode is off
+    @set_time_limit(0); // attempt to let this run
+    $increment = $PHORUM['mod_htmlpurifier']['migrate-sigs-increment'];
+
+    require_once(dirname(__FILE__) . '/../migrate.php');
+    // migrate signatures
+    // do this in batches so we don't run out of time/space
+    $end = $offset + $increment;
+    $user_ids = array();
+    for ($i = $offset; $i < $end; $i++) {
+        $user_ids[] = $i;
+    }
+    $userinfos = phorum_db_user_get_fields($user_ids, 'signature');
+    foreach ($userinfos as $i => $user) {
+        if (empty($user['signature'])) continue;
+        $sig = $user['signature'];
+        // perform standard Phorum processing on the sig
+        $sig = str_replace(array("&","<",">"), array("&amp;","&lt;","&gt;"), $sig);
+        $sig = preg_replace("/<((http|https|ftp):\/\/[a-z0-9;\/\?:@=\&\$\-_\.\+!*'\(\),~%]+?)>/i", "$1", $sig);
+        // prepare fake data to pass to migration function
+        $fake_data = array(array("author"=>"", "email"=>"", "subject"=>"", 'body' => $sig));
+        list($fake_message) = phorum_htmlpurifier_migrate($fake_data);
+        $user['signature'] = $fake_message['body'];
+        if (!phorum_api_user_save($user)) {
+            exit('Error while saving user data');
+        }
+    }
+    unset($userinfos); // free up memory
+
+    // query for highest ID in database
+    $type = $PHORUM['DBCONFIG']['type'];
+    $sql = "select MAX(user_id) from {$PHORUM['user_table']}";
+    $row = phorum_db_interact(DB_RETURN_ROW, $sql);
+    $top_id = (int) $row[0];
+
+    $offset += $increment;
+    if ($offset > $top_id) { // test for end condition
+        echo 'Migration finished';
+        $PHORUM['mod_htmlpurifier']['migrate-sigs'] = false;
+        phorum_htmlpurifier_commit_settings();
+        return true;
+    }
+    $host  = $_SERVER['HTTP_HOST'];
+    $uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
+    $extra = 'admin.php?module=modsettings&mod=htmlpurifier&migrate-sigs=' . $offset;
+    // relies on output buffering to work
+    header("Location: http://$host$uri/$extra");
+    exit;
+
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/plugins/phorum/settings/save.php b/library/ezyang/htmlpurifier/plugins/phorum/settings/save.php
new file mode 100644
index 0000000000..2aefaf83a0
--- /dev/null
+++ b/library/ezyang/htmlpurifier/plugins/phorum/settings/save.php
@@ -0,0 +1,29 @@
+<?php
+
+function phorum_htmlpurifier_save_settings()
+{
+    global $PHORUM;
+    if (phorum_htmlpurifier_config_file_exists()) {
+        echo "Cannot update settings, <code>mods/htmlpurifier/config.php</code> already exists. To change
+        settings, edit that file. To use the web form, delete that file.<br />";
+    } else {
+        $config = phorum_htmlpurifier_get_config(true);
+        if (!isset($_POST['reset'])) $config->mergeArrayFromForm($_POST, 'config', $PHORUM['mod_htmlpurifier']['directives']);
+        $PHORUM['mod_htmlpurifier']['config'] = $config->getAll();
+    }
+    $PHORUM['mod_htmlpurifier']['wysiwyg'] = !empty($_POST['wysiwyg']);
+    $PHORUM['mod_htmlpurifier']['suppress_message'] = !empty($_POST['suppress_message']);
+    if(!phorum_htmlpurifier_commit_settings()){
+        $error="Database error while updating settings.";
+    } else {
+        echo "Settings Updated<br />";
+    }
+}
+
+function phorum_htmlpurifier_commit_settings()
+{
+    global $PHORUM;
+    return phorum_db_update_settings(array("mod_htmlpurifier"=>$PHORUM["mod_htmlpurifier"]));
+}
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/release1-update.php b/library/ezyang/htmlpurifier/release1-update.php
new file mode 100644
index 0000000000..834d385676
--- /dev/null
+++ b/library/ezyang/htmlpurifier/release1-update.php
@@ -0,0 +1,110 @@
+<?php
+
+// release script
+// PHP 5.0 only
+
+if (php_sapi_name() != 'cli') {
+    echo 'Release script cannot be called from web-browser.';
+    exit;
+}
+
+if (!isset($argv[1])) {
+    echo
+'php release.php [version]
+    HTML Purifier release script
+';
+    exit;
+}
+
+$version = trim($argv[1]);
+
+// Bump version numbers:
+
+// ...in VERSION
+file_put_contents('VERSION', $version);
+
+// ...in NEWS
+if ($is_dev = (strpos($version, 'dev') === false)) {
+  $date = date('Y-m-d');
+  $news_c = str_replace(
+      $l = "$version, unknown release date",
+      "$version, released $date",
+      file_get_contents('NEWS'),
+      $c
+  );
+  if (!$c) {
+      echo 'Could not update NEWS, missing ' . $l . PHP_EOL;
+      exit;
+  } elseif ($c > 1) {
+      echo 'More than one release declaration in NEWS replaced' . PHP_EOL;
+      exit;
+  }
+  file_put_contents('NEWS', $news_c);
+}
+
+// ...in Doxyfile
+$doxyfile_c = preg_replace(
+    '/(?<=PROJECT_NUMBER {9}= )[^\s]+/m', // brittle
+    $version,
+    file_get_contents('Doxyfile'),
+    1, $c
+);
+if (!$c) {
+    echo 'Could not update Doxyfile, missing PROJECT_NUMBER.' . PHP_EOL;
+    exit;
+}
+file_put_contents('Doxyfile', $doxyfile_c);
+
+// ...in HTMLPurifier.php
+$htmlpurifier_c = file_get_contents('library/HTMLPurifier.php');
+$htmlpurifier_c = preg_replace(
+    '/HTML Purifier .+? - /',
+    "HTML Purifier $version - ",
+    $htmlpurifier_c,
+    1, $c
+);
+if (!$c) {
+    echo 'Could not update HTMLPurifier.php, missing HTML Purifier [version] header.' . PHP_EOL;
+    exit;
+}
+$htmlpurifier_c = preg_replace(
+    '/public \$version = \'.+?\';/',
+    "public \$version = '$version';",
+    $htmlpurifier_c,
+    1, $c
+);
+if (!$c) {
+    echo 'Could not update HTMLPurifier.php, missing public $version.' . PHP_EOL;
+    exit;
+}
+$htmlpurifier_c = preg_replace(
+    '/const VERSION = \'.+?\';/',
+    "const VERSION = '$version';",
+    $htmlpurifier_c,
+    1, $c
+);
+if (!$c) {
+    echo 'Could not update HTMLPurifier.php, missing const $version.' . PHP_EOL;
+    exit;
+}
+file_put_contents('library/HTMLPurifier.php', $htmlpurifier_c);
+
+$config_c = file_get_contents('library/HTMLPurifier/Config.php');
+$config_c = preg_replace(
+    '/public \$version = \'.+?\';/',
+    "public \$version = '$version';",
+    $config_c,
+    1, $c
+);
+if (!$c) {
+    echo 'Could not update Config.php, missing public $version.' . PHP_EOL;
+    exit;
+}
+file_put_contents('library/HTMLPurifier/Config.php', $config_c);
+
+passthru('php maintenance/flush.php');
+
+if ($is_dev) echo "Review changes, write something in WHATSNEW and FOCUS, and then commit with log 'Release $version.'" . PHP_EOL;
+else echo "Numbers updated to dev, no other modifications necessary!";
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/release2-tag.php b/library/ezyang/htmlpurifier/release2-tag.php
new file mode 100644
index 0000000000..25e5300d81
--- /dev/null
+++ b/library/ezyang/htmlpurifier/release2-tag.php
@@ -0,0 +1,22 @@
+<?php
+
+// Tags releases
+
+if (php_sapi_name() != 'cli') {
+    echo 'Release script cannot be called from web-browser.';
+    exit;
+}
+
+require 'svn.php';
+
+$svn_info = my_svn_info('.');
+
+$version = trim(file_get_contents('VERSION'));
+
+$trunk_url  = $svn_info['Repository Root'] . '/htmlpurifier/trunk';
+$trunk_tag_url  = $svn_info['Repository Root'] . '/htmlpurifier/tags/' . $version;
+
+echo "Tagging trunk to tags/$version...";
+passthru("svn copy --message \"Tag $version release.\" $trunk_url $trunk_tag_url");
+
+// vim: et sw=4 sts=4
diff --git a/library/ezyang/htmlpurifier/test-settings.sample.php b/library/ezyang/htmlpurifier/test-settings.sample.php
new file mode 100644
index 0000000000..886b974867
--- /dev/null
+++ b/library/ezyang/htmlpurifier/test-settings.sample.php
@@ -0,0 +1,76 @@
+<?php
+
+// ATTENTION! DO NOT EDIT THIS FILE!
+// This file is necessary to run the unit tests and profiling scripts.
+// Please copy it to 'test-settings.php' and make the necessary edits.
+
+// Note: The only external library you *need* is SimpleTest; everything else
+//       is optional.
+
+// We've got a lot of tests, so we recommend turning the limit off.
+set_time_limit(0);
+
+// Turning off output buffering will prevent mysterious errors from core dumps.
+$data = @ob_get_clean();
+if ($data !== false && $data !== '') {
+    echo "Output buffer contains data [".urlencode($data)."]\n";
+    exit;
+}
+
+// -----------------------------------------------------------------------------
+// REQUIRED SETTINGS
+
+// Note on running SimpleTest:
+//      Because HTML Purifier is PHP5-only and E_STRICT compliant, SimpleTest
+//      1.0.1 will not work; you need to run SimpleTest off its trunk using:
+//
+//        $ svn co https://simpletest.svn.sourceforge.net/svnroot/simpletest/simpletest/trunk simpletest
+//
+//      If SimpleTest is borked with HTML Purifier, please contact me or
+//      the SimpleTest devs; I am a developer for SimpleTest so I should be
+//      able to quickly assess a fix. SimpleTest's problem is my problem!
+
+// Where is SimpleTest located? Remember to include a trailing slash!
+$simpletest_location = '/path/to/simpletest/';
+
+// -----------------------------------------------------------------------------
+// OPTIONAL SETTINGS
+
+// Note on running PHPT:
+//      Vanilla PHPT from https://github.com/tswicegood/PHPT_Core should
+//      work fine on Linux w/o multitest.
+//
+//      To do multitest or Windows testing, you'll need some more
+//      patches at https://github.com/ezyang/PHPT_Core
+//
+//      I haven't tested the Windows setup in a while so I don't know if
+//      it still works.
+
+// Should PHPT tests be enabled?
+$GLOBALS['HTMLPurifierTest']['PHPT'] = false;
+
+// If PHPT isn't in your Path via PEAR, set that here:
+// set_include_path('/path/to/phpt/Core/src' . PATH_SEPARATOR . get_include_path());
+
+// Where is CSSTidy located? (Include trailing slash. Leave false to disable.)
+$csstidy_location    = false;
+
+// For tests/multitest.php, which versions to test?
+$versions_to_test    = array();
+
+// Stable PHP binary to use when invoking maintenance scripts.
+$php = 'php';
+
+// For tests/multitest.php, what is the multi-version executable? It must
+// accept an extra parameter (version number) before all other arguments
+$phpv = false;
+
+// Should PEAR tests be run? If you've got a valid PEAR installation, set this
+// to true (or, if it's not in the include path, to its install directory).
+$GLOBALS['HTMLPurifierTest']['PEAR'] = false;
+
+// If PEAR is enabled, what PEAR tests should be run? (Note: you will
+// need to ensure these libraries are installed)
+$GLOBALS['HTMLPurifierTest']['Net_IDNA2'] = true;
+
+// vim: et sw=4 sts=4
diff --git a/mod/help.php b/mod/help.php
index 5465d3e900..7222569279 100644
--- a/mod/help.php
+++ b/mod/help.php
@@ -62,7 +62,7 @@ function help_content(&$a) {
 	if ($filename !== "Home") {
 		// create TOC but not for home
 		$lines = explode("\n", $html);
-		$toc="<style>aside ul {padding-left: 1em;}</style><h2>TOC</h2><ul id='toc'>";
+		$toc="<style>aside ul {padding-left: 1em;}aside h1{font-size:2em}</style><h2>TOC</h2><ul id='toc'>";
 		$lastlevel=1;
 		$idnum = array(0,0,0,0,0,0,0);
 		foreach($lines as &$line){
@@ -84,7 +84,7 @@ function help_content(&$a) {
 				}
 			}
 		}
-		for($k=1;$k<$lastlevel; $k++) $toc.="</ul>";
+		for($k=0;$k<$lastlevel; $k++) $toc.="</ul>";
 		$html = implode("\n",$lines);
 
 		$a->page['aside'] = $toc.$a->page['aside'];
diff --git a/mod/ping.php b/mod/ping.php
index 50d179595e..2eb94576b3 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -219,19 +219,21 @@ function ping_init(&$a) {
 				<home>$home</home>\r\n";
 		if ($register!=0) echo "<register>$register</register>";
 
-		if ( count($groups_unseen) ) {
+		if (count($groups_unseen)) {
 			echo '<groups>';
-			foreach ($groups_unseen as $it) {
-				echo '<group id="' . $it['id'] . '">' . $it['count'] . "</group>";
-			}
+			foreach ($groups_unseen as $it)
+				if ($it['count'] > 0)
+					echo '<group id="'.$it['id'].'">'.$it['count']."</group>";
+
 			echo "</groups>";
 		}
 
-		if ( count($forums_unseen) ) {
+		if (count($forums_unseen)) {
 			echo '<forums>';
-			foreach ($forums_unseen as $it) {
-				echo '<forum id="' . $it['id'] . '">' . $it['count'] . "</forum>";
-			}
+			foreach ($forums_unseen as $it)
+				if ($it['count'] > 0)
+					echo '<forum id="'.$it['id'].'">'.$it['count']."</forum>";
+
 			echo "</forums>";
 		}
 
diff --git a/view/theme/vier/style.css b/view/theme/vier/style.css
index 2b78d25d7f..e35556f541 100644
--- a/view/theme/vier/style.css
+++ b/view/theme/vier/style.css
@@ -1141,6 +1141,10 @@ aside h4, right_aside h4 {
   font-size: 1.17em;
 }
 
+aside img {
+  max-width: 175px;
+}
+
 .nets-ul {
   margin-top: 0px;
 }