public function list_supported_urls(array $urls, array $options = array())
{
$extensions = $this->get_supported_extensions();
$result = array();
foreach ($urls as $url) {
$ext = core_media_manager::instance()->get_extension($url);
if (in_array('.' . $ext, $extensions) && core_useragent::supports_html5($ext)) {
// Unfortunately html5 video does not handle fallback properly.
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=10975
// That means we need to do browser detect and not use html5 on
// browsers which do not support the given type, otherwise users
// will not even see the fallback link.
$result[] = $url;
}
}
return $result;
}
/**
* Generates code required to embed the player.
*
* @param moodle_url[] $urls
* @param string $name
* @param int $width
* @param int $height
* @param array $options
* @return string
*/
public function embed($urls, $name, $width, $height, $options)
{
global $CFG;
require_once $CFG->libdir . '/filelib.php';
$sources = array();
$mediamanager = core_media_manager::instance();
$datasetup = [];
$text = null;
$isaudio = null;
$hastracks = false;
$hasposter = false;
if (array_key_exists(core_media_manager::OPTION_ORIGINAL_TEXT, $options) && preg_match('/^<(video|audio)\\b/i', $options[core_media_manager::OPTION_ORIGINAL_TEXT], $matches)) {
// Original text already had media tag - get some data from it.
$text = $options[core_media_manager::OPTION_ORIGINAL_TEXT];
$isaudio = strtolower($matches[1]) === 'audio';
$hastracks = preg_match('/<track\\b/i', $text);
$hasposter = self::get_attribute($text, 'poster') !== null;
}
// Currently Flash in VideoJS does not support responsive layout. If Flash is enabled try to guess
// if HTML5 player will be engaged for the user and then set it to responsive.
$responsive = get_config('media_videojs', 'useflash') && !$this->youtube ? null : true;
// Build list of source tags.
foreach ($urls as $url) {
$extension = $mediamanager->get_extension($url);
$mimetype = $mediamanager->get_mimetype($url);
if ($mimetype === 'video/quicktime' && (core_useragent::is_chrome() || core_useragent::is_edge())) {
// Fix for VideoJS/Chrome bug https://github.com/videojs/video.js/issues/423 .
$mimetype = 'video/mp4';
}
$source = html_writer::empty_tag('source', array('src' => $url, 'type' => $mimetype));
$sources[] = $source;
if ($isaudio === null) {
$isaudio = in_array('.' . $extension, file_get_typegroup('extension', 'audio'));
}
if ($responsive === null) {
$responsive = core_useragent::supports_html5($extension);
}
}
$sources = implode("\n", $sources);
// Find the title, prevent double escaping.
$title = $this->get_name($name, $urls);
$title = preg_replace(['/&/', '/>/', '/</'], ['&', '>', '<'], $title);
// Ensure JS is loaded. This will also load language strings and populate $this->language with the current language.
$this->load_amd_module();
if ($this->youtube) {
$this->load_amd_module('Youtube');
$datasetup[] = '"techOrder": ["youtube"]';
$datasetup[] = '"sources": [{"type": "video/youtube", "src":"' . $urls[0] . '"}]';
$sources = '';
// Do not specify <source> tags - it may confuse browser.
$isaudio = false;
// Just in case.
}
// Add a language.
if ($this->language) {
$datasetup[] = '"language": "' . $this->language . '"';
}
// Set responsive option.
if ($responsive) {
$datasetup[] = '"fluid": true';
}
if ($isaudio && !$hastracks) {
// We don't need a full screen toggle for the audios (except when tracks are present).
$datasetup[] = '"controlBar": {"fullscreenToggle": false}';
}
if ($isaudio && !$height && !$hastracks && !$hasposter) {
// Hide poster area for audios without tracks or poster.
// See discussion on https://github.com/videojs/video.js/issues/2777 .
// Maybe TODO: if there are only chapter tracks we still don't need poster area.
$datasetup[] = '"aspectRatio": "1:0"';
}
// Attributes for the video/audio tag.
static $playercounter = 1;
$attributes = ['data-setup' => '{' . join(', ', $datasetup) . '}', 'id' => 'id_videojs_' . $playercounter++, 'class' => get_config('media_videojs', $isaudio ? 'audiocssclass' : 'videocssclass')];
if (!$responsive) {
// Note we ignore limitsize setting if not responsive.
parent::pick_video_size($width, $height);
$attributes += ['width' => $width] + ($height ? ['height' => $height] : []);
}
if ($text !== null) {
// Original text already had media tag - add necessary attributes and replace sources
// with the supported URLs only.
if (($class = self::get_attribute($text, 'class')) !== null) {
$attributes['class'] .= ' ' . $class;
}
$text = self::remove_attributes($text, ['id', 'width', 'height', 'class']);
if (self::get_attribute($text, 'title') === null) {
$attributes['title'] = $title;
}
$text = self::add_attributes($text, $attributes);
$text = self::replace_sources($text, $sources);
} else {
// Create <video> or <audio> tag with necessary attributes and all sources.
// We don't want fallback to another player because list_supported_urls() is already smart.
// Otherwise we could end up with nested <audio> or <video> tags. Fallback to link only.
$attributes += ['preload' => 'auto', 'controls' => 'true', 'title' => $title];
$text = html_writer::tag($isaudio ? 'audio' : 'video', $sources . self::LINKPLACEHOLDER, $attributes);
}
// Limit the width of the video if width is specified.
// We do not do it in the width attributes of the video because it does not work well
// together with responsive behavior.
if ($responsive) {
self::pick_video_size($width, $height);
if ($width) {
$text = html_writer::div($text, null, ['style' => 'max-width:' . $width . 'px;']);
}
}
return html_writer::div($text, 'mediaplugin mediaplugin_videojs');
}
