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;
use Friendica\Core\Renderer;
use Friendica\DI;
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_settings_post()
{
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if (!DI::userSession()->getLocalUserId() || empty($_POST['mathjax-submit'])) {
return;
}
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'mathjax', 'use', intval($_POST['mathjax_use']));
}
function mathjax_settings(array &$data)
{
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if (!DI::userSession()->getLocalUserId()) {
return;
}
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$use = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mathjax', 'use', false);
$tpl = Renderer::getMarkupTemplate('settings.tpl', 'addon/mathjax');
$html = Renderer::replaceMacros($tpl, [
'$description' => DI::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', DI::l10n()->t('Use the MathJax renderer'), $use, ''],
]);
$data = [
'addon' => 'mathjax',
'title' => 'MathJax',
'html' => $html,
];
}
function mathjax_footer(string &$body)
{
// if the visitor of the page is not a local_user, use MathJax
// otherwise check the users settings.
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if (!DI::userSession()->getLocalUserId() || DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mathjax', 'use', false)) {
DI::page()->registerFooterScript(__DIR__ . '/asset/MathJax.js?config=TeX-MML-AM_CHTML');
DI::page()->registerFooterScript(__DIR__ . '/mathjax.js');
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}
}