friendica-addons/mathjax/mathjax.php

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<?php
/**
* Name: MathJax
* Description: Addon for Friendica to include MathJax (LaTeX math syntax)
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* Version: 2.0
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* Author: Tobias Diekershoff <https://social.diekershoff.de/profile/tobias>
* Author: Hypolite Petovan <https://friendica.mrpetovan.com/profile/hypolite>
* License: 3-clause BSD license
*/
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use Friendica\App;
use Friendica\Core\Hook;
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use Friendica\Core\L10n;
use Friendica\Core\PConfig;
use Friendica\Core\Renderer;
function mathjax_install()
{
Hook::register('footer' , __FILE__, 'mathjax_footer');
Hook::register('addon_settings' , __FILE__, 'mathjax_settings');
Hook::register('addon_settings_post', __FILE__, 'mathjax_settings_post');
}
function mathjax_uninstall()
{
Hook::unregister('footer' , __FILE__, 'mathjax_footer');
Hook::unregister('addon_settings' , __FILE__, 'mathjax_settings');
Hook::unregister('addon_settings_post', __FILE__, 'mathjax_settings_post');
// Legacy hooks
Hook::unregister('load_config' , __FILE__, 'mathjax_load_config');
Hook::unregister('page_header' , __FILE__, 'mathjax_page_header');
Hook::unregister('template_vars' , __FILE__, 'mathjax_template_vars');
}
function mathjax_settings_post($a)
{
if (!local_user() || empty($_POST['mathjax-submit'])) {
return;
}
PConfig::set(local_user(), 'mathjax', 'use', intval($_POST['mathjax_use']));
}
function mathjax_settings(App $a, &$s)
{
if (!local_user()) {
return;
}
$use = PConfig::get(local_user(), 'mathjax', 'use', false);
$tpl = Renderer::getMarkupTemplate('settings.tpl', __DIR__);
$s .= Renderer::replaceMacros($tpl, [
'$title' => 'MathJax',
'$description' => 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.'),
'$mathjax_use' => ['mathjax_use', L10n::t('Use the MathJax renderer'), $use, ''],
'$savesettings' => L10n::t('Save Settings'),
]);
}
function mathjax_footer(App $a, &$b)
{
// if the visitor of the page is not a local_user, use MathJax
// otherwise check the users settings.
if (!local_user() || PConfig::get(local_user(), 'mathjax', 'use', false)) {
$a->registerFooterScript(__DIR__ . '/asset/MathJax.js?config=TeX-MML-AM_CHTML');
$a->registerFooterScript(__DIR__ . '/mathjax.js');
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}
}