3907 lines
161 KiB
PHP
3907 lines
161 KiB
PHP
<?php
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/**
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* Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.
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* Occupies space in the HTML5 pseudo-namespace, which may cause conflicts.
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*
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* @note
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* Recent changes to PHP's DOM extension have resulted in some fatal
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* error conditions with the original version of PH5P. Pending changes,
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* this lexer will punt to DirectLex if DOM throughs an exception.
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*/
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class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex {
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public function tokenizeHTML($html, $config, $context) {
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$new_html = $this->normalize($html, $config, $context);
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$new_html = $this->wrapHTML($new_html, $config, $context);
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try {
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$parser = new HTML5($new_html);
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$doc = $parser->save();
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} catch (DOMException $e) {
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// Uh oh, it failed. Punt to DirectLex.
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$lexer = new HTMLPurifier_Lexer_DirectLex();
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$context->register('PH5PError', $e); // save the error, so we can detect it
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return $lexer->tokenizeHTML($html, $config, $context); // use original HTML
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}
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$tokens = array();
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$this->tokenizeDOM(
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$doc->getElementsByTagName('html')->item(0)-> // <html>
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getElementsByTagName('body')->item(0)-> // <body>
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getElementsByTagName('div')->item(0) // <div>
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, $tokens);
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return $tokens;
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}
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}
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/*
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Copyright 2007 Jeroen van der Meer <http://jero.net/>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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class HTML5 {
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private $data;
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private $char;
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private $EOF;
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private $state;
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private $tree;
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private $token;
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private $content_model;
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private $escape = false;
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private $entities = array('AElig;','AElig','AMP;','AMP','Aacute;','Aacute',
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'Acirc;','Acirc','Agrave;','Agrave','Alpha;','Aring;','Aring','Atilde;',
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'Atilde','Auml;','Auml','Beta;','COPY;','COPY','Ccedil;','Ccedil','Chi;',
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'Dagger;','Delta;','ETH;','ETH','Eacute;','Eacute','Ecirc;','Ecirc','Egrave;',
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'Egrave','Epsilon;','Eta;','Euml;','Euml','GT;','GT','Gamma;','Iacute;',
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'Iacute','Icirc;','Icirc','Igrave;','Igrave','Iota;','Iuml;','Iuml','Kappa;',
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'LT;','LT','Lambda;','Mu;','Ntilde;','Ntilde','Nu;','OElig;','Oacute;',
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'Oacute','Ocirc;','Ocirc','Ograve;','Ograve','Omega;','Omicron;','Oslash;',
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'Oslash','Otilde;','Otilde','Ouml;','Ouml','Phi;','Pi;','Prime;','Psi;',
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'QUOT;','QUOT','REG;','REG','Rho;','Scaron;','Sigma;','THORN;','THORN',
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'TRADE;','Tau;','Theta;','Uacute;','Uacute','Ucirc;','Ucirc','Ugrave;',
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'Ugrave','Upsilon;','Uuml;','Uuml','Xi;','Yacute;','Yacute','Yuml;','Zeta;',
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'aacute;','aacute','acirc;','acirc','acute;','acute','aelig;','aelig',
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'agrave;','agrave','alefsym;','alpha;','amp;','amp','and;','ang;','apos;',
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'aring;','aring','asymp;','atilde;','atilde','auml;','auml','bdquo;','beta;',
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'brvbar;','brvbar','bull;','cap;','ccedil;','ccedil','cedil;','cedil',
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'cent;','cent','chi;','circ;','clubs;','cong;','copy;','copy','crarr;',
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'cup;','curren;','curren','dArr;','dagger;','darr;','deg;','deg','delta;',
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'diams;','divide;','divide','eacute;','eacute','ecirc;','ecirc','egrave;',
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'egrave','empty;','emsp;','ensp;','epsilon;','equiv;','eta;','eth;','eth',
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'euml;','euml','euro;','exist;','fnof;','forall;','frac12;','frac12',
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'frac14;','frac14','frac34;','frac34','frasl;','gamma;','ge;','gt;','gt',
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'hArr;','harr;','hearts;','hellip;','iacute;','iacute','icirc;','icirc',
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'iexcl;','iexcl','igrave;','igrave','image;','infin;','int;','iota;',
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'iquest;','iquest','isin;','iuml;','iuml','kappa;','lArr;','lambda;','lang;',
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'laquo;','laquo','larr;','lceil;','ldquo;','le;','lfloor;','lowast;','loz;',
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'lrm;','lsaquo;','lsquo;','lt;','lt','macr;','macr','mdash;','micro;','micro',
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'middot;','middot','minus;','mu;','nabla;','nbsp;','nbsp','ndash;','ne;',
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'ni;','not;','not','notin;','nsub;','ntilde;','ntilde','nu;','oacute;',
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'oacute','ocirc;','ocirc','oelig;','ograve;','ograve','oline;','omega;',
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'omicron;','oplus;','or;','ordf;','ordf','ordm;','ordm','oslash;','oslash',
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'otilde;','otilde','otimes;','ouml;','ouml','para;','para','part;','permil;',
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'perp;','phi;','pi;','piv;','plusmn;','plusmn','pound;','pound','prime;',
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'prod;','prop;','psi;','quot;','quot','rArr;','radic;','rang;','raquo;',
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'raquo','rarr;','rceil;','rdquo;','real;','reg;','reg','rfloor;','rho;',
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'rlm;','rsaquo;','rsquo;','sbquo;','scaron;','sdot;','sect;','sect','shy;',
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'shy','sigma;','sigmaf;','sim;','spades;','sub;','sube;','sum;','sup1;',
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'sup1','sup2;','sup2','sup3;','sup3','sup;','supe;','szlig;','szlig','tau;',
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'there4;','theta;','thetasym;','thinsp;','thorn;','thorn','tilde;','times;',
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'times','trade;','uArr;','uacute;','uacute','uarr;','ucirc;','ucirc',
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'ugrave;','ugrave','uml;','uml','upsih;','upsilon;','uuml;','uuml','weierp;',
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'xi;','yacute;','yacute','yen;','yen','yuml;','yuml','zeta;','zwj;','zwnj;');
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const PCDATA = 0;
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const RCDATA = 1;
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const CDATA = 2;
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const PLAINTEXT = 3;
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const DOCTYPE = 0;
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const STARTTAG = 1;
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const ENDTAG = 2;
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const COMMENT = 3;
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const CHARACTR = 4;
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const EOF = 5;
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public function __construct($data) {
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$data = str_replace("\r\n", "\n", $data);
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$data = str_replace("\r", null, $data);
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$this->data = $data;
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$this->char = -1;
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$this->EOF = strlen($data);
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$this->tree = new HTML5TreeConstructer;
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$this->content_model = self::PCDATA;
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$this->state = 'data';
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while($this->state !== null) {
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$this->{$this->state.'State'}();
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}
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}
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public function save() {
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return $this->tree->save();
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}
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private function char() {
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return ($this->char < $this->EOF)
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? $this->data[$this->char]
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: false;
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}
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private function character($s, $l = 0) {
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if($s + $l < $this->EOF) {
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if($l === 0) {
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return $this->data[$s];
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} else {
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return substr($this->data, $s, $l);
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}
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}
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}
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private function characters($char_class, $start) {
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return preg_replace('#^(['.$char_class.']+).*#s', '\\1', substr($this->data, $start));
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}
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private function dataState() {
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// Consume the next input character
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$this->char++;
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$char = $this->char();
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if($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
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/* U+0026 AMPERSAND (&)
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When the content model flag is set to one of the PCDATA or RCDATA
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states: switch to the entity data state. Otherwise: treat it as per
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the "anything else" entry below. */
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$this->state = 'entityData';
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} elseif($char === '-') {
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/* If the content model flag is set to either the RCDATA state or
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the CDATA state, and the escape flag is false, and there are at
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least three characters before this one in the input stream, and the
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last four characters in the input stream, including this one, are
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U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
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and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
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if(($this->content_model === self::RCDATA || $this->content_model ===
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self::CDATA) && $this->escape === false &&
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$this->char >= 3 && $this->character($this->char - 4, 4) === '<!--') {
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$this->escape = true;
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}
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/* In any case, emit the input character as a character token. Stay
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in the data state. */
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => $char
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));
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/* U+003C LESS-THAN SIGN (<) */
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} elseif($char === '<' && ($this->content_model === self::PCDATA ||
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(($this->content_model === self::RCDATA ||
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$this->content_model === self::CDATA) && $this->escape === false))) {
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/* When the content model flag is set to the PCDATA state: switch
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to the tag open state.
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When the content model flag is set to either the RCDATA state or
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the CDATA state and the escape flag is false: switch to the tag
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open state.
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Otherwise: treat it as per the "anything else" entry below. */
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$this->state = 'tagOpen';
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/* U+003E GREATER-THAN SIGN (>) */
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} elseif($char === '>') {
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/* If the content model flag is set to either the RCDATA state or
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the CDATA state, and the escape flag is true, and the last three
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characters in the input stream including this one are U+002D
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HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
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set the escape flag to false. */
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if(($this->content_model === self::RCDATA ||
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$this->content_model === self::CDATA) && $this->escape === true &&
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$this->character($this->char, 3) === '-->') {
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$this->escape = false;
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}
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/* In any case, emit the input character as a character token.
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Stay in the data state. */
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => $char
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));
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} elseif($this->char === $this->EOF) {
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/* EOF
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Emit an end-of-file token. */
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$this->EOF();
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} elseif($this->content_model === self::PLAINTEXT) {
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/* When the content model flag is set to the PLAINTEXT state
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THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of
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the text and emit it as a character token. */
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => substr($this->data, $this->char)
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));
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$this->EOF();
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} else {
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/* Anything else
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THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that
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otherwise would also be treated as a character token and emit it
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as a single character token. Stay in the data state. */
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$len = strcspn($this->data, '<&', $this->char);
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$char = substr($this->data, $this->char, $len);
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$this->char += $len - 1;
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => $char
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));
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$this->state = 'data';
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}
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}
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private function entityDataState() {
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// Attempt to consume an entity.
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$entity = $this->entity();
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// If nothing is returned, emit a U+0026 AMPERSAND character token.
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// Otherwise, emit the character token that was returned.
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$char = (!$entity) ? '&' : $entity;
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => $char
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));
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// Finally, switch to the data state.
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$this->state = 'data';
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}
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private function tagOpenState() {
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switch($this->content_model) {
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case self::RCDATA:
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case self::CDATA:
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/* If the next input character is a U+002F SOLIDUS (/) character,
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consume it and switch to the close tag open state. If the next
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input character is not a U+002F SOLIDUS (/) character, emit a
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U+003C LESS-THAN SIGN character token and switch to the data
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state to process the next input character. */
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if($this->character($this->char + 1) === '/') {
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$this->char++;
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$this->state = 'closeTagOpen';
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} else {
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => '<'
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));
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$this->state = 'data';
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}
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break;
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case self::PCDATA:
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// If the content model flag is set to the PCDATA state
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// Consume the next input character:
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$this->char++;
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$char = $this->char();
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if($char === '!') {
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/* U+0021 EXCLAMATION MARK (!)
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Switch to the markup declaration open state. */
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$this->state = 'markupDeclarationOpen';
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} elseif($char === '/') {
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/* U+002F SOLIDUS (/)
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Switch to the close tag open state. */
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$this->state = 'closeTagOpen';
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} elseif(preg_match('/^[A-Za-z]$/', $char)) {
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/* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
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Create a new start tag token, set its tag name to the lowercase
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version of the input character (add 0x0020 to the character's code
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point), then switch to the tag name state. (Don't emit the token
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yet; further details will be filled in before it is emitted.) */
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$this->token = array(
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'name' => strtolower($char),
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'type' => self::STARTTAG,
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'attr' => array()
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);
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$this->state = 'tagName';
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} elseif($char === '>') {
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/* U+003E GREATER-THAN SIGN (>)
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Parse error. Emit a U+003C LESS-THAN SIGN character token and a
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U+003E GREATER-THAN SIGN character token. Switch to the data state. */
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => '<>'
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));
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$this->state = 'data';
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} elseif($char === '?') {
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/* U+003F QUESTION MARK (?)
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Parse error. Switch to the bogus comment state. */
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$this->state = 'bogusComment';
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} else {
|
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/* Anything else
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Parse error. Emit a U+003C LESS-THAN SIGN character token and
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reconsume the current input character in the data state. */
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$this->emitToken(array(
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'type' => self::CHARACTR,
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'data' => '<'
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));
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$this->char--;
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$this->state = 'data';
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}
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break;
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}
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}
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private function closeTagOpenState() {
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$next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
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$the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;
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if(($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
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(!$the_same || ($the_same && (!preg_match('/[\t\n\x0b\x0c >\/]/',
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$this->character($this->char + 1 + strlen($next_node))) || $this->EOF === $this->char)))) {
|
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/* If the content model flag is set to the RCDATA or CDATA states then
|
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examine the next few characters. If they do not match the tag name of
|
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the last start tag token emitted (case insensitively), or if they do but
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they are not immediately followed by one of the following characters:
|
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* U+0009 CHARACTER TABULATION
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* U+000A LINE FEED (LF)
|
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* U+000B LINE TABULATION
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* U+000C FORM FEED (FF)
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* U+0020 SPACE
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|
* U+003E GREATER-THAN SIGN (>)
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* U+002F SOLIDUS (/)
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* EOF
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...then there is a parse error. Emit a U+003C LESS-THAN SIGN character
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token, a U+002F SOLIDUS character token, and switch to the data state
|
|
to process the next input character. */
|
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$this->emitToken(array(
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'type' => self::CHARACTR,
|
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'data' => '</'
|
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));
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|
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$this->state = 'data';
|
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|
|
} else {
|
|
/* Otherwise, if the content model flag is set to the PCDATA state,
|
|
or if the next few characters do match that tag name, consume the
|
|
next input character: */
|
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$this->char++;
|
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$char = $this->char();
|
|
|
|
if(preg_match('/^[A-Za-z]$/', $char)) {
|
|
/* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
|
|
Create a new end tag token, set its tag name to the lowercase version
|
|
of the input character (add 0x0020 to the character's code point), then
|
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switch to the tag name state. (Don't emit the token yet; further details
|
|
will be filled in before it is emitted.) */
|
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$this->token = array(
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'name' => strtolower($char),
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'type' => self::ENDTAG
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);
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|
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$this->state = 'tagName';
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|
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} 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. */
|
|
$this->emitToken(array(
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'type' => self::CHARACTR,
|
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'data' => '</'
|
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));
|
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|
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$this->char--;
|
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$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';
|
|
|