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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Code highlighter filter.
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*
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* Filter converting text code into a well-styled block of code.
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*
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* @package filter_codehighlighter
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* @copyright 2023 Meirza <meirza.arson@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class filter_codehighlighter extends moodle_text_filter {
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/**
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* Apply the filter to the text
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*
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* @param string $text to be processed by the text
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* @param array $options filter options
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* @return string text after processing
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*/
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public function filter($text, array $options = []): string {
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global $PAGE;
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if (!isset($options['originalformat'])) {
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return $text;
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}
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// The pattern.
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$re = '/<pre.+?class=".*?language-.*?"><code>/i';
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// Stops looking after the first match.
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preg_match($re, $text, $matches);
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if ($matches) {
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$PAGE->requires->js_call_amd('filter_codehighlighter/prism-init');
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}
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return $text;
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}
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}
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