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< ? php
/**
* Name : MathJax
* Description : Addon for Friendika to include MathJax ( LaTeX math syntax )
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* Version : 2
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* Author : Tobias Diekershoff < https :// social . diekershoff . de / profile / tobias >
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* Author : Hypolite Petovan < https :// friendica . mrpetovan . com / profile / hypolite >
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* License : 3 - clause BSD license
*/
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use Friendica\App ;
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use Friendica\Core\Addon ;
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use Friendica\Core\L10n ;
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use Friendica\Core\PConfig ;
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function mathjax_install ()
{
Addon :: registerHook ( 'page_end' , __FILE__ , 'mathjax_page_end' );
Addon :: registerHook ( 'addon_settings' , __FILE__ , 'mathjax_settings' );
Addon :: registerHook ( 'addon_settings_post' , __FILE__ , 'mathjax_settings_post' );
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}
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function mathjax_uninstall ()
{
Addon :: unregisterHook ( 'page_end' , __FILE__ , 'mathjax_page_end' );
Addon :: unregisterHook ( 'addon_settings' , __FILE__ , 'mathjax_settings' );
Addon :: unregisterHook ( 'addon_settings_post' , __FILE__ , 'mathjax_settings_post' );
// Legacy hooks
Addon :: unregisterHook ( 'load_config' , __FILE__ , 'mathjax_load_config' );
Addon :: unregisterHook ( 'page_header' , __FILE__ , 'mathjax_page_header' );
Addon :: unregisterHook ( 'template_vars' , __FILE__ , 'mathjax_template_vars' );
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}
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function mathjax_settings_post ( $a )
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{
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if ( ! local_user ()) {
return ;
}
if ( empty ( $_POST [ 'mathjax-submit' ])) {
return ;
}
PConfig :: set ( local_user (), 'mathjax' , 'use' , intval ( $_POST [ 'mathjax_use' ]));
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}
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function mathjax_settings ( App $a , & $s )
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{
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if ( ! local_user ()) {
return ;
}
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$use = PConfig :: get ( local_user (), 'mathjax' , 'use' , false );
$usetext = $use ? ' checked="checked" ' : '' ;
$s .= '<span id="settings_mathjax_inflated" class="settings-block fakelink" style="display: block;" onclick="openClose(\'settings_mathjax_expanded\'); openClose(\'settings_mathjax_inflated\');">' ;
$s .= '<h3>MathJax ' . L10n :: t ( 'Settings' ) . '</h3>' ;
$s .= '</span>' ;
$s .= '<div id="settings_mathjax_expanded" class="settings-block" style="display: none;">' ;
$s .= '<span class="fakelink" onclick="openClose(\'settings_mathjax_expanded\'); openClose(\'settings_mathjax_inflated\');">' ;
$s .= '<h3>MathJax ' . L10n :: t ( 'Settings' ) . '</h3>' ;
$s .= '</span>' ;
$s .= '<p>' . L10n :: t ( 'The MathJax addon renders mathematical formulae written using the LaTeX syntax surrounded by the usual $$ or an eqnarray block in the postings of your wall,network tab and private mail.' ) . '</p>' ;
$s .= '<label id="mathjax_label" for="mathjax_use">' . L10n :: t ( 'Use the MathJax renderer' ) . '</label>' ;
$s .= '<input id="mathjax_use" type="checkbox" name="mathjax_use" value="1"' . $usetext . ' />' ;
$s .= '<div class="clear"></div>' ;
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$s .= '<div class="settings-submit-wrapper" ><input type="submit" id="mathjax-submit" name="mathjax-submit" class="settings-submit" value="' . L10n :: t ( 'Save Settings' ) . '" /></div>' ;
$s .= '</div>' ;
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}
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/* we need to add one JavaScript include command to the html output
* note that you have to check the jsmath / easy / load . js too .
*/
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function mathjax_page_end ( App $a , & $b )
{
// if the visitor of the page is not a local_user, use MathJax
// otherwise check the users settings.
$url = $a -> get_baseurl () . '/addon/mathjax/asset/MathJax.js?config=TeX-MML-AM_CHTML' ;
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if ( ! local_user () || PConfig :: get ( local_user (), 'mathjax' , 'use' , false )) {
$b .= <<< HTML
< script type = " text/javascript " src = " { $url } " ></ script >
< script type = " text/javascript " >
document . addEventListener ( 'postprocess_liveupdate' , function () {
MathJax . Hub . Queue ([ 'Typeset' , MathJax . Hub ]);
});
</ script >
HTML ;
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}
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}
