--- /dev/null
+<?php
+
+/**
+ * Name: MathJax
+ * Description: Addon for Friendika to include MathJax (LaTeX math syntax)
+ * Version: 1.0
+ * Author: Tobias Diekershoff <http://diekershoff.homeunix.net/friendika/profile/tobias>
+ * License: 3-clause BSD license
+ */
+
+function mathjax_install() {
+ register_hook('page_header', 'addon/mathjax/mathjax.php', 'mathjax_page_header');
+ register_hook('plugin_settings', 'addon/mathjax/mathjax.php', 'mathjax_settings');
+ register_hook('plugin_settings_post', 'addon/mathjax/mathjax.php', 'mathjax_settings_post');
+ logger('installed js_math plugin');
+}
+function mathjax_uninstall() {
+ unregister_hook('page_header', 'addon/mathjax/mathjax.php', 'mathjax_page_header');
+ unregister_hook('plugin_settings', 'addon/mathjax/mathjax.php', 'mathjax_settings');
+ unregister_hook('plugin_settings_post', 'addon/mathjax/mathjax.php', 'mathjax_settings_post');
+}
+function mathjax_settings_post ($a, $post) {
+ if (! local_user())
+ return;
+ // don't check statusnet settings if statusnet submit button is not clicked
+ if (!x($_POST,'mathjax-submit'))
+ return;
+ set_pconfig(local_user(),'mathjax','use',intval($_POST['mathjax_use']));
+}
+function mathjax_settings (&$a, &$s) {
+ if (! local_user())
+ return;
+ $use = get_pconfig(local_user(),'mathjax','use');
+ $usetext = (($use) ? ' checked="checked" ' : '');
+ $s .= '<div class="settings-block">';
+ $s .= '<h3>MathJax '.t('Settings').'</h3>';
+ $s .= '<p>'.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">'.t('Use the MathJax renderer').'</label>';
+ $s .= '<input id="mathjax_use" type="checkbox" name="mathjax_use" value="1"'. $usetext .' />';
+ $s .= '<div class="clear"></div>';
+
+ $s .= '<div class="settings-submit-wrapper" ><input type="submit" id="mathjax-submit" name="mathjax-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
+ $s .= '</div>';
+}
+/* we need to add one JavaScript include command to the html output
+ * note that you have to check the jsmath/easy/load.js too.
+ */
+function mathjax_page_header($a, &$b) {
+ // if the visitor of the page is not a local_user, use MathJax
+ // otherwise check the users settings.
+ $url = get_config ('mathjax','baseurl','http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML');
+ if (! local_user()) {
+ $b .= '<script type="text/javascript" src="'.$url.'"></script>';
+ } else {
+ $use = get_pconfig(local_user(),'mathjax','use');
+ if ($use) {
+ $b .= '<script type="text/javascript" src="'.$url.'"></script>';
+ }
+ }
+}
+function mathjax_plugin_admin_post (&$a) {
+ $baseurl = ((x($_POST, 'baseurl')) ? trim($_POST['baseurl']) : 'http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML');
+ set_config('mathjax','baseurl',$baseurl);
+ info( t('Settings updated.'). EOL);
+}
+function mathjax_plugin_admin (&$a, &$o) {
+ $t = file_get_contents( dirname(__file__)."/admin.tpl");
+ if (get_config('mathjax','baseurl','') == '') {
+ set_config('mathjax','baseurl','http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML');
+ }
+ $o = replace_macros( $t, array(
+ '$baseurl' => array('baseurl', t('MathJax Base URL'), get_config('mathjax','baseurl' ), t('The URL for the javascript file that should be included to use MathJax. Can be either the MathJax CDN or another installation of MathJax.')),
+ ));
+}