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Long Term Support Release
1 <?php 2 // This file is part of Moodle - http://moodle.org/ 3 // 4 // Moodle is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // Moodle is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>. 16 17 /** 18 * Main class for plugin 'media_html5audio' 19 * 20 * @package media_html5audio 21 * @copyright 2016 Marina Glancy 22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 23 */ 24 25 defined('MOODLE_INTERNAL') || die(); 26 27 /** 28 * Player that creates HTML5 <audio> tag. 29 * 30 * @package media_html5audio 31 * @copyright 2016 Marina Glancy 32 * @author 2011 The Open University 33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 34 */ 35 class media_html5audio_plugin extends core_media_player_native { 36 public function embed($urls, $name, $width, $height, $options) { 37 38 if (array_key_exists(core_media_manager::OPTION_ORIGINAL_TEXT, $options) && 39 preg_match('/^<(video|audio)\b/i', $options[core_media_manager::OPTION_ORIGINAL_TEXT], $matches)) { 40 // We already had media tag, do nothing here. 41 return $options[core_media_manager::OPTION_ORIGINAL_TEXT]; 42 } 43 44 // Build array of source tags. 45 $sources = array(); 46 foreach ($urls as $url) { 47 $params = ['src' => $url]; 48 $ext = core_media_manager::instance()->get_extension($url); 49 if ($ext !== 'aac') { 50 // Some browsers get confused by mimetype on source for AAC files. 51 $mimetype = core_media_manager::instance()->get_mimetype($url); 52 $params['type'] = $mimetype; 53 } 54 $sources[] = html_writer::empty_tag('source', $params); 55 } 56 57 $sources = implode("\n", $sources); 58 $title = $this->get_name($name, $urls); 59 // Escape title but prevent double escaping. 60 $title = s(preg_replace(['/&/', '/>/', '/</'], ['&', '>', '<'], $title)); 61 62 // Default to not specify size (so it can be changed in css). 63 $size = ''; 64 if ($width) { 65 $size = 'width="' . $width . '"'; 66 } 67 68 // We don't want fallback to another player because list_supported_urls() is already smart. 69 // Otherwise we could end up with nested <audio> tags. Fallback to link only. 70 $fallback = self::LINKPLACEHOLDER; 71 72 return <<<OET 73 <audio controls="true" $size class="mediaplugin mediaplugin_html5audio" preload="none" title="$title"> 74 $sources 75 $fallback 76 </audio> 77 OET; 78 } 79 80 public function get_supported_extensions() { 81 global $CFG; 82 require_once($CFG->libdir . '/filelib.php'); 83 return file_get_typegroup('extension', 'html_audio'); 84 } 85 86 public function list_supported_urls(array $urls, array $options = array()) { 87 $extensions = $this->get_supported_extensions(); 88 $result = array(); 89 foreach ($urls as $url) { 90 $ext = core_media_manager::instance()->get_extension($url); 91 if (in_array('.' . $ext, $extensions) && core_useragent::supports_html5($ext)) { 92 // Unfortunately html5 video does not handle fallback properly. 93 // https://www.w3.org/Bugs/Public/show_bug.cgi?id=10975 94 // That means we need to do browser detect and not use html5 on 95 // browsers which do not support the given type, otherwise users 96 // will not even see the fallback link. 97 $result[] = $url; 98 } 99 } 100 return $result; 101 } 102 103 /** 104 * Default rank 105 * @return int 106 */ 107 public function get_rank() { 108 return 20; 109 } 110 } 111
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