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111 lines
4.0 KiB
111 lines
4.0 KiB
<?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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* Main class for plugin 'media_html5audio'
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*
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* @package media_html5audio
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* @copyright 2016 Marina Glancy
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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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defined('MOODLE_INTERNAL') || die();
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/**
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* Player that creates HTML5 <audio> tag.
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*
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* @package media_html5audio
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* @copyright 2016 Marina Glancy
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* @author 2011 The Open University
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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 media_html5audio_plugin extends core_media_player_native {
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public function embed($urls, $name, $width, $height, $options) {
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if (array_key_exists(core_media_manager::OPTION_ORIGINAL_TEXT, $options) &&
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preg_match('/^<(video|audio)\b/i', $options[core_media_manager::OPTION_ORIGINAL_TEXT], $matches)) {
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// We already had media tag, do nothing here.
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return $options[core_media_manager::OPTION_ORIGINAL_TEXT];
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}
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// Build array of source tags.
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$sources = array();
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foreach ($urls as $url) {
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$params = ['src' => $url];
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$ext = core_media_manager::instance()->get_extension($url);
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if ($ext !== 'aac') {
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// Some browsers get confused by mimetype on source for AAC files.
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$mimetype = core_media_manager::instance()->get_mimetype($url);
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$params['type'] = $mimetype;
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}
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$sources[] = html_writer::empty_tag('source', $params);
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}
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$sources = implode("\n", $sources);
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$title = $this->get_name($name, $urls);
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// Escape title but prevent double escaping.
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$title = s(preg_replace(['/&/', '/>/', '/</'], ['&', '>', '<'], $title));
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// Default to not specify size (so it can be changed in css).
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$size = '';
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if ($width) {
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$size = 'width="' . $width . '"';
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}
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// We don't want fallback to another player because list_supported_urls() is already smart.
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// Otherwise we could end up with nested <audio> tags. Fallback to link only.
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$fallback = self::LINKPLACEHOLDER;
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return <<<OET
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<audio controls="true" $size class="mediaplugin mediaplugin_html5audio" preload="none" title="$title">
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$sources
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$fallback
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</audio>
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OET;
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}
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public function get_supported_extensions() {
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global $CFG;
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require_once($CFG->libdir . '/filelib.php');
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return file_get_typegroup('extension', 'html_audio');
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}
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public function list_supported_urls(array $urls, array $options = array()) {
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$extensions = $this->get_supported_extensions();
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$result = array();
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foreach ($urls as $url) {
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$ext = core_media_manager::instance()->get_extension($url);
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if (in_array('.' . $ext, $extensions) && core_useragent::supports_html5($ext)) {
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// Unfortunately html5 video does not handle fallback properly.
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// https://www.w3.org/Bugs/Public/show_bug.cgi?id=10975
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// That means we need to do browser detect and not use html5 on
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// browsers which do not support the given type, otherwise users
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// will not even see the fallback link.
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$result[] = $url;
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}
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}
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return $result;
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}
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/**
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* Default rank
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* @return int
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*/
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public function get_rank() {
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return 20;
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}
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}
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