gnu-social/plugins/LatexNotes/LatexNotes.php

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<?php
declare(strict_types = 1);
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
/**
* LaTeX note support for GNU social
*
* @package GNUsocial
* @category Plugin
*
* @author Phablulo <phablulo@gmail.com>
* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
namespace Plugin\LatexNotes;
use App\Core\Event;
use App\Core\Modules\Plugin;
use PhpLatex_Parser;
use PhpLatex_Renderer_Html;
class LatexNotes extends Plugin
{
public function onPostingAvailableContentTypes(array &$types): bool
{
$types['LaTeX'] = 'application/x-latex';
return Event::next;
}
public function onRenderNoteContent($content, $content_type, &$rendered): bool
{
if ($content_type !== 'application/x-latex') {
return Event::next;
}
// https://github.com/xemlock/php-latex
$parser = new PhpLatex_Parser();
$parsedTree = $parser->parse($content);
$htmlRenderer = new PhpLatex_Renderer_Html();
$rendered = $htmlRenderer->render($parsedTree);
return Event::stop;
}
}