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Updating to Moodle up to version 4.5.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| <?php | ||
| // This file is part of Moodle - http://moodle.org/ | ||
| // | ||
| // Moodle is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // Moodle 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 General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with Moodle. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| namespace filter_syntaxhighlighter; | ||
|
|
||
| if (class_exists('\core_filters\text_filter')) { | ||
| class_alias('\core_filters\text_filter', 'base_text_filter'); | ||
| } else { | ||
| class_alias('\moodle_text_filter', 'base_text_filter'); | ||
| } | ||
|
|
||
| /** | ||
| * Filter main class for the filter_syntaxhighlighter plugin. | ||
| * | ||
| * @package filter_syntaxhighlighter | ||
| * @author Mark Sharp <m.sharp@chi.ac.uk> | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| * @copyright 2017 University of Chichester {@link https://www.chi.ac.uk} | ||
| */ | ||
| class text_filter extends \base_text_filter { | ||
| /** | ||
| * The filter function is required, but the text just passes through. | ||
| * | ||
| * @param string $text HTML to be processed. | ||
| * @param array $options Options for filter. | ||
| * | ||
| * @return string String containing processed HTML. | ||
| */ | ||
| public function filter($text, array $options = []) { | ||
| if (!is_string($text) || empty($text)) { | ||
| return $text; | ||
| } | ||
| // phpcs:disable moodle.Strings.ForbiddenStrings.Found | ||
| // RegExp detects optional language example input. | ||
| $re = "~(<pre>|)```(lang:(\w+);;[\r\n]{0,}|)(.*?)```(<\/pre>|)~isu"; | ||
| // phpcs:enable moodle.Strings.ForbiddenStrings.Found | ||
| return preg_replace_callback($re, [$this, 'code_replace'], $text); | ||
| } | ||
|
|
||
| /** | ||
| * Replaces match group with formatted html. | ||
| * | ||
| * Match Group of regExp match | ||
| * * Prevents "<pre><pre><code>..." if <pre> in Atto used. | ||
| * mgrp[0] = "<pre>```lang:anything;;...code...```</pre>" | ||
| * * Recommended to place inside <pre> in Atto editor | ||
| * * (preserves \s+,\t,\r,\n chars) | ||
| * mgrp[1] = "<pre>" | ||
| * * With trailing line break (\r|\n|\r\n) for different | ||
| * * line break styles (preserve of empty rows in code block) | ||
| * mgrp[2] = "lang:anything;;\r\n" | ||
| * * Specified lang class | ||
| * mgrp[3] = "anything" | ||
| * mgrp[4] = "...code..." | ||
| * mgrp[5] = "</pre>" | ||
| * | ||
| * @param array $mgrp Match group from preg_replace. | ||
| * | ||
| * @return string | ||
| */ | ||
| private function code_replace($mgrp) { | ||
| return | ||
| '<pre><code' . ($mgrp[2] ? ' class="lang-' . $mgrp[3] .'"' : '') . '>' . | ||
| str_replace(['<p>', '</p>'], ['', "\n"], $mgrp[4]) . | ||
| '</code></pre>'; | ||
| } | ||
|
|
||
| /** | ||
| * Loads the javascript and style sheets. | ||
| * | ||
| * @param moodle_page $page The page we are going to add requirements to. | ||
| * @param context $context The context which contents are going to be filtered. | ||
| */ | ||
| public function setup($page, $context) { | ||
| global $CFG; | ||
| static $jsinitialised = false; | ||
|
|
||
| if (empty($jsinitialised)) { | ||
| $css = get_config('filter_syntaxhighlighter', 'styleurl'); | ||
| $cdn = get_config('filter_syntaxhighlighter', 'cdn'); | ||
| if ($cdn) { | ||
| $css = 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/' . $css . '.min.css'; | ||
| } else { | ||
| $css = $CFG->wwwroot . '/filter/syntaxhighlighter/styles/' . $css . '.min.css'; | ||
| } | ||
| $styleurl = new \moodle_url($css); | ||
| $page->requires->css($styleurl); | ||
| $jsinitialised = true; | ||
| } | ||
| // Do this only in the context of a course the filter is enabled in. | ||
| if (array_key_exists("syntaxhighlighter", filter_get_active_in_context($context))) { | ||
| $page->requires->js_call_amd('filter_syntaxhighlighter/hljs', 'initHighlighting'); | ||
| } | ||
| } | ||
| } |
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