/moodle/filter/mediaplugin/filter.php
PHP | 914 lines | 579 code | 154 blank | 181 comment | 75 complexity | b1343f6fca23c20443c04a26e3d7a54b MD5 | raw file
Possible License(s): GPL-3.0, LGPL-2.1, BSD-3-Clause, AGPL-3.0, MPL-2.0-no-copyleft-exception, LGPL-3.0, Apache-2.0
- <?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/>.
- /**
- * Media plugin filtering
- *
- * This filter will replace any links to a media file with
- * a media plugin that plays that media inline
- *
- * @package filter
- * @subpackage mediaplugin
- * @copyright 2004 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- defined('MOODLE_INTERNAL') || die();
- require_once($CFG->libdir.'/filelib.php');
- if (!defined('FILTER_MEDIAPLUGIN_VIDEO_WIDTH')) {
- /**
- * Default media width, some plugins may use automatic sizes or accept resize parameters.
- * This can be defined in config.php.
- */
- define('FILTER_MEDIAPLUGIN_VIDEO_WIDTH', 400);
- }
- if (!defined('FILTER_MEDIAPLUGIN_VIDEO_HEIGHT')) {
- /**
- * Default video height, plugins that know aspect ration
- * should calculate it themselves using the FILTER_MEDIAPLUGIN_VIDEO_HEIGHT
- * This can be defined in config.php.
- */
- define('FILTER_MEDIAPLUGIN_VIDEO_HEIGHT', 300);
- }
- //TODO: we should use /u modifier in regex, unfortunately it may not work properly on some misconfigured servers, see lib/filter/urltolink/filter.php ...
- //TODO: we should migrate to proper config_plugin settings ...
- /**
- * Automatic media embedding filter class.
- *
- * It is highly recommended to configure servers to be compatible with our slasharguments,
- * otherwise the "?d=600x400" may not work.
- *
- * @package filter
- * @subpackage mediaplugin
- * @copyright 2004 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- class filter_mediaplugin extends moodle_text_filter {
- function filter($text, array $options = array()) {
- global $CFG;
- if (!is_string($text) or empty($text)) {
- // non string data can not be filtered anyway
- return $text;
- }
- if (stripos($text, '</a>') === false) {
- // performance shortcut - all regexes below end with the </a> tag,
- // if not present nothing can match
- return $text;
- }
- $newtext = $text; // we need to return the original value if regex fails!
- // YouTube and Vimeo are great because the files are not served by Moodle server
- if (!empty($CFG->filter_mediaplugin_enable_youtube)) {
- $search = '/<a\s[^>]*href="(https?:\/\/www\.youtube(-nocookie)?\.com)\/watch\?v=([a-z0-9\-_]+)[^"#]*(#d=([\d]{1,4})x([\d]{1,4}))?"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_youtube_callback', $newtext);
- $search = '/<a\s[^>]*href="(https?:\/\/www\.youtube(-nocookie)?\.com)\/v\/([a-z0-9\-_]+)[^"#]*(#d=([\d]{1,4})x([\d]{1,4}))?[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_youtube_callback', $newtext);
- $search = '/<a\s[^>]*href="(https?:\/\/www\.youtube(-nocookie)?\.com)\/view_play_list\?p=([a-z0-9\-_]+)[^"#]*(#d=([\d]{1,4})x([\d]{1,4}))?[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_youtube_playlist_callback', $newtext);
- $search = '/<a\s[^>]*href="(https?:\/\/www\.youtube(-nocookie)?\.com)\/p\/([a-z0-9\-_]+)[^"#]*(#d=([\d]{1,4})x([\d]{1,4}))?[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_youtube_playlist_callback', $newtext);
- }
- if (!empty($CFG->filter_mediaplugin_enable_vimeo)) {
- $search = '/<a\s[^>]*href="http:\/\/vimeo\.com\/([0-9]+)[^"#]*(#d=([\d]{1,4})x([\d]{1,4}))?[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_vimeo_callback', $newtext);
- }
- // HTML 5 audio and video tags are the future! If only if vendors decided to use just one audio and video format...
- if (!empty($CFG->filter_mediaplugin_enable_html5audio)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.(ogg|oga|aac|m4a)([#\?][^"]*)?)"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_html5audio_callback', $newtext);
- }
- if (!empty($CFG->filter_mediaplugin_enable_html5video)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.(m4v|webm|ogv|mp4)([#\?][^"]*)?)"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_html5video_callback', $newtext);
- }
- // Flash stuff
- if (!empty($CFG->filter_mediaplugin_enable_mp3)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.mp3)"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_mp3_callback', $newtext);
- }
- if ((!empty($options['noclean']) or !empty($CFG->allowobjectembed)) and !empty($CFG->filter_mediaplugin_enable_swf)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.swf)([#\?]d=([\d]{1,4})x([\d]{1,4}))?"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_swf_callback', $newtext);
- }
- if (!empty($CFG->filter_mediaplugin_enable_flv)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.(flv|f4v)([#\?][^"]*)?)"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_flv_callback', $newtext);
- }
- // The rest of legacy formats - these should not be used if possible
- if (!empty($CFG->filter_mediaplugin_enable_wmp)) {
- $search = '/<a\s[^>]*href="([^"#\?]+\.(wmv|avi))(\?d=([\d]{1,4})x([\d]{1,4}))?"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_wmp_callback', $newtext);
- }
- if (!empty($CFG->filter_mediaplugin_enable_qt)) {
- // HTML5 filtering may steal mpeg 4 formats
- $search = '/<a\s[^>]*href="([^"#\?]+\.(mpg|mpeg|mov|mp4|m4v|m4a))(\?d=([\d]{1,4})x([\d]{1,4}))?"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_qt_callback', $newtext);
- }
- if (!empty($CFG->filter_mediaplugin_enable_rm)) {
- // hopefully nobody is using this any more!!
- // rpm is redhat packaging format these days, it is better to prevent these in default installs
- $search = '/<a\s[^>]*href="([^"#\?]+\.(ra|ram|rm|rv))"[^>]*>([^>]*)<\/a>/is';
- $newtext = preg_replace_callback($search, 'filter_mediaplugin_real_callback', $newtext);
- }
- if (empty($newtext) or $newtext === $text) {
- // error or not filtered
- unset($newtext);
- return $text;
- }
- return $newtext;
- }
- }
- ///===========================
- /// utility functions
- /**
- * Get mimetype of given url, useful for # alternative urls.
- *
- * @private
- * @param string $url
- * @return string $mimetype
- */
- function filter_mediaplugin_get_mimetype($url) {
- $matches = null;
- if (preg_match("|^(.*)/[a-z]*file.php(\?file=)?(/[^&\?#]*)|", $url, $matches)) {
- // remove the special moodle file serving hacks so that the *file.php is ignored
- $url = $matches[1].$matches[3];
- } else {
- $url = preg_replace('/[#\?].*$/', '', $url);
- }
- $mimetype = mimeinfo('type', $url);
- return $mimetype;
- }
- /**
- * Parse list of alternative URLs
- * @param string $url urls separated with '#', size specified as ?d=640x480 or #d=640x480
- * @param int $defaultwidth
- * @param int $defaultheight
- * @return array (urls, width, height)
- */
- function filter_mediaplugin_parse_alternatives($url, $defaultwidth = 0, $defaultheight = 0) {
- $urls = explode('#', $url);
- $width = $defaultwidth;
- $height = $defaultheight;
- $returnurls = array();
- foreach ($urls as $url) {
- $matches = null;
- if (preg_match('/^d=([\d]{1,4})x([\d]{1,4})$/i', $url, $matches)) { // #d=640x480
- $width = $matches[1];
- $height = $matches[2];
- continue;
- }
- if (preg_match('/\?d=([\d]{1,4})x([\d]{1,4})$/i', $url, $matches)) { // old style file.ext?d=640x480
- $width = $matches[1];
- $height = $matches[2];
- $url = str_replace($matches[0], '', $url);
- }
- $url = str_replace('&', '&', $url);
- $url = clean_param($url, PARAM_URL);
- if (empty($url)) {
- continue;
- }
- $returnurls[] = $url;
- }
- return array($returnurls, $width, $height);
- }
- /**
- * Should the current tag be ignored in this filter?
- * @param string $tag
- * @return bool
- */
- function filter_mediaplugin_ignore($tag) {
- if (preg_match('/class="[^"]*nomediaplugin/i', $tag)) {
- return true;
- } else {
- false;
- }
- }
- ///===========================
- /// callback filter functions
- /**
- * Replace audio links with audio tag.
- *
- * @param array $link
- * @return string
- */
- function filter_mediaplugin_html5audio_callback(array $link) {
- global $CFG;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $info = trim($link[4]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackaudio', 'filter_mediaplugin');
- }
- list($urls, $ignorewidth, $ignoredheight) = filter_mediaplugin_parse_alternatives($link[1]);
- $fallbackurl = null;
- $fallbackmime = null;
- $sources = array();
- $fallbacklink = null;
- foreach ($urls as $url) {
- $mimetype = filter_mediaplugin_get_mimetype($url);
- if (strpos($mimetype, 'audio/') !== 0) {
- continue;
- }
- $sources[] = html_writer::tag('source', '', array('src' => $url, 'type' => $mimetype));
- if ($fallbacklink === null) {
- $fallbacklink = html_writer::link($url.'#', $info); // the extra '#' prevents linking in mp3 filter below
- }
- if ($fallbackurl === null) {
- if ($mimetype === 'audio/mp3' or $mimetype === 'audio/aac') {
- $fallbackurl = str_replace('&', '&', $url);
- $fallbackmime = $mimetype;
- }
- }
- }
- if (!$sources) {
- return $link[0];
- }
- if ($fallbackmime !== null) {
- // fallback to quicktime
- $fallback = <<<OET
- <object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" width="200" height="20">
- <param name="pluginspage" value="http://www.apple.com/quicktime/download/" />
- <param name="src" value="$fallbackurl" />
- <param name="controller" value="true" />
- <param name="loop" value="false" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- $fallbacklink
- <!--[if !IE]>-->
- <object data="$fallbackurl" type="$fallbackmime" width="200" height="20">
- <param name="src" value="$fallbackurl" />
- <param name="pluginurl" value="http://www.apple.com/quicktime/download/" />
- <param name="controller" value="true" />
- <param name="loop" value="false" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- $fallbacklink
- </object>
- <!--<![endif]-->
- </object>
- OET;
- } else {
- $fallback = $fallbacklink;
- }
- $sources = implode("\n", $sources);
- $title = s($info);
- // audio players are supposed to be inline elements
- $output = <<<OET
- <audio controls="true" width="200" class="mediaplugin mediaplugin_html5audio" preload="no" title="$title">
- $sources
- $fallback
- </audio>
- OET;
- return $output;
- }
- /**
- * Replace ogg video links with video tag.
- *
- * Please note this is not going to work in all browsers,
- * it is also not xhtml strict.
- *
- * @param array $link
- * @return string
- */
- function filter_mediaplugin_html5video_callback(array $link) {
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $info = trim($link[4]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackvideo', 'filter_mediaplugin');
- }
- list($urls, $width, $height) = filter_mediaplugin_parse_alternatives($link[1], FILTER_MEDIAPLUGIN_VIDEO_WIDTH, 0);
- $fallbackurl = null;
- $fallbackmime = null;
- $sources = array();
- $fallbacklink = null;
- foreach ($urls as $url) {
- $mimetype = filter_mediaplugin_get_mimetype($url);
- if (strpos($mimetype, 'video/') !== 0) {
- continue;
- }
- $source = html_writer::tag('source', '', array('src' => $url, 'type' => $mimetype));
- if ($mimetype === 'video/mp4') {
- // better add m4v as first source, it might be a bit more compatible with problematic browsers
- array_unshift($sources, $source);
- } else {
- $sources[] = $source;
- }
- if ($fallbacklink === null) {
- $fallbacklink = html_writer::link($url.'#', $info); // the extra '#' prevents linking in mp3 filter below
- }
- if ($fallbackurl === null) {
- if ($mimetype === 'video/mp4') {
- $fallbackurl = str_replace('&', '&', $url);
- $fallbackmime = $mimetype;
- }
- }
- }
- if (!$sources) {
- return $link[0];
- }
- if ($fallbackmime !== null) {
- $qtheight = ($height == 0) ? FILTER_MEDIAPLUGIN_VIDEO_HEIGHT : ($height + 15);
- // fallback to quicktime
- $fallback = <<<OET
- <object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" width="$width" height="$qtheight">
- <param name="pluginspage" value="http://www.apple.com/quicktime/download/" />
- <param name="src" value="$fallbackurl" />
- <param name="controller" value="true" />
- <param name="loop" value="false" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- $fallbacklink
- <!--[if !IE]>-->
- <object data="$fallbackurl" type="$fallbackmime" width="$width" height="$qtheight">
- <param name="src" value="$fallbackurl" />
- <param name="pluginurl" value="http://www.apple.com/quicktime/download/" />
- <param name="controller" value="true" />
- <param name="loop" value="false" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- $fallbacklink
- </object>
- <!--<![endif]-->
- </object>
- OET;
- } else {
- $fallback = $fallbacklink;
- }
- $sources = implode("\n", $sources);
- $title = s($info);
- if (empty($height)) {
- // automatic height
- $size = "width=\"$width\"";
- } else {
- $size = "width=\"$width\" height=\"$height\"";
- }
- $output = <<<OET
- <span class="mediaplugin mediaplugin_html5video">
- <video controls="true" $size preload="metadata" title="$title">
- $sources
- $fallback
- </video>
- </span>
- OET;
- return $output;
- }
- /**
- * Replace mp3 links with small audio player.
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_mp3_callback($link) {
- static $count = 0;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $count++;
- $id = 'filter_mp3_'.time().'_'.$count; //we need something unique because it might be stored in text cache
- $url = $link[1];
- $rawurl = str_replace('&', '&', $url);
- $info = trim($link[2]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('mp3audio', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($rawurl, $info, array('class'=>'mediafallbacklink'));
- //note: when flash or javascript not available only the $printlink is displayed,
- // audio players are supposed to be inline elements
- $output = html_writer::tag('span', $printlink, array('id'=>$id, 'class'=>'mediaplugin mediaplugin_mp3'));
- $output .= html_writer::script(js_writer::function_call('M.util.add_audio_player', array($id, $rawurl, true))); // we can not use standard JS init because this may be cached
- return $output;
- }
- /**
- * Replace swf links with embedded flash objects.
- *
- * Please note this is not a secure and is recommended to be disabled on production systems.
- *
- * @deprecated
- * @param $link
- * @return string
- */
- function filter_mediaplugin_swf_callback($link) {
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $width = empty($link[3]) ? FILTER_MEDIAPLUGIN_VIDEO_WIDTH : $link[3];
- $height = empty($link[4]) ? FILTER_MEDIAPLUGIN_VIDEO_HEIGHT : $link[4];
- $url = $link[1];
- $rawurl = str_replace('&', '&', $url);
- $info = trim($link[5]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('flashanimation', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($rawurl, $info, array('class'=>'mediafallbacklink'));
- $output = <<<OET
- <span class="mediaplugin mediaplugin_swf">
- <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="$width" height="$height">
- <param name="movie" value="$url" />
- <param name="autoplay" value="true" />
- <param name="loop" value="true" />
- <param name="controller" value="true" />
- <param name="scale" value="aspect" />
- <param name="base" value="." />
- <param name="allowscriptaccess" value="never" />
- <!--[if !IE]>-->
- <object type="application/x-shockwave-flash" data="$url" width="$width" height="$height">
- <param name="controller" value="true" />
- <param name="autoplay" value="true" />
- <param name="loop" value="true" />
- <param name="scale" value="aspect" />
- <param name="base" value="." />
- <param name="allowscriptaccess" value="never" />
- <!--<![endif]-->
- $printlink
- <!--[if !IE]>-->
- </object>
- <!--<![endif]-->
- </object>
- </span>
- OET;
- return $output;
- }
- /**
- * Replace flv links with flow player.
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_flv_callback($link) {
- static $count = 0;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $count++;
- $id = 'filter_flv_'.time().'_'.$count; //we need something unique because it might be stored in text cache
- list($urls, $width, $height) = filter_mediaplugin_parse_alternatives($link[1], 0, 0);
- $autosize = false;
- if (!$width and !$height) {
- $width = FILTER_MEDIAPLUGIN_VIDEO_WIDTH;
- $height = FILTER_MEDIAPLUGIN_VIDEO_HEIGHT;
- $autosize = true;
- }
- $flashurl = null;
- $sources = array();
- foreach ($urls as $url) {
- $mimetype = filter_mediaplugin_get_mimetype($url);
- if (strpos($mimetype, 'video/') !== 0) {
- continue;
- }
- $source = html_writer::tag('source', '', array('src' => $url, 'type' => $mimetype));
- if ($mimetype === 'video/mp4') {
- // better add m4v as first source, it might be a bit more compatible with problematic browsers
- array_unshift($sources, $source);
- } else {
- $sources[] = $source;
- }
- if ($flashurl === null) {
- $flashurl = $url;
- }
- }
- if (!$sources) {
- return $link[0];
- }
- $info = trim($link[4]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackvideo', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($flashurl.'#', $info, array('class'=>'mediafallbacklink')); // the '#' prevents the QT filter
- $title = s($info);
- if (count($sources) > 1) {
- $sources = implode("\n", $sources);
- // html 5 fallback
- $printlink = <<<OET
- <video controls="true" width="$width" height="$height" preload="metadata" title="$title">
- $sources
- $printlink
- </video>
- <noscript><br />
- $printlink
- </noscript>
- OET;
- }
- // note: no need to print "this is flv link" because it is printed automatically if JS or Flash not available
- $output = html_writer::tag('span', $printlink, array('id'=>$id, 'class'=>'mediaplugin mediaplugin_flv'));
- $output .= html_writer::script(js_writer::function_call('M.util.add_video_player', array($id, rawurlencode($flashurl), $width, $height, $autosize))); // we can not use standard JS init because this may be cached
- return $output;
- }
- /**
- * Replace real media links with real player.
- *
- * Note: hopefully nobody is using this obsolete format any more.
- *
- * @deprectated
- * @param $link
- * @return string
- */
- function filter_mediaplugin_real_callback($link) {
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $url = $link[1];
- $rawurl = str_replace('&', '&', $url);
- //Note: the size is hardcoded intentionally because this does not work anyway!
- $width = FILTER_MEDIAPLUGIN_VIDEO_WIDTH;
- $height = FILTER_MEDIAPLUGIN_VIDEO_HEIGHT;
- $info = trim($link[3]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackvideo', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($rawurl, $info, array('class'=>'mediafallbacklink'));
- return <<<OET
- <span class="mediaplugin mediaplugin_real">
- $printlink <br />
- <object title="$info" classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" data="$url" width="$width" height="$height"">
- <param name="src" value="$url" />
- <param name="controls" value="All" />
- <!--[if !IE]>-->
- <object title="$info" type="audio/x-pn-realaudio-plugin" data="$url" width="$width" height="$height">
- <param name="src" value="$url" />
- <param name="controls" value="All" />
- <!--<![endif]-->
- <!--[if !IE]>-->
- </object>
- <!--<![endif]-->
- </object>
- </span>
- OET;
- }
- /**
- * Change links to YouTube into embedded YouTube videos
- *
- * Note: resizing via url is not supported, user can click the fullscreen button instead
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_youtube_callback($link) {
- global $CFG;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $site = $link[1];
- $videoid = $link[3];
- $info = trim($link[7]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('siteyoutube', 'filter_mediaplugin');
- }
- $info = s($info);
- $width = empty($link[5]) ? FILTER_MEDIAPLUGIN_VIDEO_WIDTH : $link[5];
- $height = empty($link[6]) ? FILTER_MEDIAPLUGIN_VIDEO_HEIGHT : $link[6];
- if (empty($CFG->xmlstrictheaders)) {
- return <<<OET
- <iframe title="$info" width="$width" height="$height" src="$site/embed/$videoid?rel=0" frameborder="0" allowfullscreen></iframe>
- OET;
- }
- //NOTE: we can not use any link fallback because it breaks built-in player on iOS devices
- $output = <<<OET
- <span class="mediaplugin mediaplugin_youtube">
- <object title="$info" type="application/x-shockwave-flash" data="$site/v/$videoid&fs=1&rel=0" width="$width" height="$height">
- <param name="movie" value="$site/v/$videoid&fs=1&rel=0" />
- <param name="FlashVars" value="playerMode=embedded" />
- <param name="allowFullScreen" value="true" />
- </object>
- </span>
- OET;
- return $output;
- }
- /**
- * Change YouTube playlist into embedded YouTube playlist videos
- *
- * Note: resizing via url is not supported, user can click the fullscreen button instead
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_youtube_playlist_callback($link) {
- global $CFG;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $site = $link[1];
- $playlist = $link[3];
- $info = trim($link[7]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('siteyoutube', 'filter_mediaplugin');
- }
- $printlink = html_writer::link("$site/view_play_list\?p=$playlist", $info, array('class'=>'mediafallbacklink'));
- $info = s($info);
- $width = empty($link[5]) ? FILTER_MEDIAPLUGIN_VIDEO_WIDTH : $link[5];
- $height = empty($link[6]) ? FILTER_MEDIAPLUGIN_VIDEO_HEIGHT : $link[6];
- // TODO: iframe HTML 5 video not implemented and object does work on iOS devices
- $output = <<<OET
- <span class="mediaplugin mediaplugin_youtube">
- <object title="$info" type="application/x-shockwave-flash" data="$site/p/$playlist&fs=1&rel=0" width="$width" height="$height">
- <param name="movie" value="$site/v/$playlist&fs=1&rel=0" />
- <param name="FlashVars" value="playerMode=embedded" />
- <param name="allowFullScreen" value="true" />
- $printlink</object>
- </span>
- OET;
- return $output;
- }
- /**
- * Change links to Vimeo into embedded Vimeo videos
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_vimeo_callback($link) {
- global $CFG;
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $videoid = $link[1];
- $info = s(strip_tags($link[5]));
- //Note: resizing via url is not supported, user can click the fullscreen button instead
- // iframe embedding is not xhtml strict but it is the only option that seems to work on most devices
- $width = empty($link[3]) ? FILTER_MEDIAPLUGIN_VIDEO_WIDTH : $link[3];
- $height = empty($link[4]) ? FILTER_MEDIAPLUGIN_VIDEO_HEIGHT : $link[4];
- $output = <<<OET
- <span class="mediaplugin mediaplugin_vimeo">
- <iframe title="$info" src="http://player.vimeo.com/video/$videoid" width="$width" height="$height" frameborder="0"></iframe>
- </span>
- OET;
- return $output;
- }
- /**
- * Embed video using window media player if available
- *
- * This does not work much outside of IE, hopefully not many ppl use it these days.
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_wmp_callback($link) {
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $url = $link[1];
- $rawurl = str_replace('&', '&', $url);
- $info = trim($link[6]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackvideo', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($rawurl, $info, array('class'=>'mediafallbacklink'));
- if (empty($link[4]) or empty($link[5])) {
- $mpsize = '';
- $size = 'width="'.FILTER_MEDIAPLUGIN_VIDEO_WIDTH.'" height="'.(FILTER_MEDIAPLUGIN_VIDEO_HEIGHT+64).'"';
- $autosize = 'true';
- } else {
- $size = 'width="'.$link[4].'" height="'.($link[5] + 15).'"';
- $mpsize = 'width="'.$link[4].'" height="'.($link[5] + 64).'"';
- $autosize = 'false';
- }
- $mimetype = filter_mediaplugin_get_mimetype($url);
- return <<<OET
- <span class="mediaplugin mediaplugin_wmp">
- $printlink <br />
- <object classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" $mpsize standby="Loading Microsoft(R) Windows(R) Media Player components..." type="application/x-oleobject">
- <param name="Filename" value="$url" />
- <param name="src" value="$url" />
- <param name="url" value="$url" />
- <param name="ShowControls" value="true" />
- <param name="AutoRewind" value="true" />
- <param name="AutoStart" value="false" />
- <param name="Autosize" value="$autosize" />
- <param name="EnableContextMenu" value="true" />
- <param name="TransparentAtStart" value="false" />
- <param name="AnimationAtStart" value="false" />
- <param name="ShowGotoBar" value="false" />
- <param name="EnableFullScreenControls" value="true" />
- <param name="uimode" value="full" />
- <!--[if !IE]>-->
- <object data="$url" type="$mimetype" $size>
- <param name="src" value="$url" />
- <param name="controller" value="true" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="resize" value="scale" />
- </object>
- <!--<![endif]-->
- </object></span>
- OET;
- }
- /**
- * Replace quicktime links with quicktime player.
- *
- * You need to install a quicktime player, it is not available for all browsers+OS combinations.
- *
- * @param $link
- * @return string
- */
- function filter_mediaplugin_qt_callback($link) {
- if (filter_mediaplugin_ignore($link[0])) {
- return $link[0];
- }
- $url = $link[1];
- $rawurl = str_replace('&', '&', $url);
- $info = trim($link[6]);
- if (empty($info) or strpos($info, 'http') === 0) {
- $info = get_string('fallbackvideo', 'filter_mediaplugin');
- }
- $printlink = html_writer::link($rawurl, $info, array('class'=>'mediafallbacklink'));
- if (empty($link[4]) or empty($link[5])) {
- $size = 'width="'.FILTER_MEDIAPLUGIN_VIDEO_WIDTH.'" height="'.(FILTER_MEDIAPLUGIN_VIDEO_HEIGHT+15).'"';
- } else {
- $size = 'width="'.$link[4].'" height="'.($link[5]+15).'"';
- }
- $mimetype = filter_mediaplugin_get_mimetype($url);
- // this is the safest fallback for incomplete or missing browser support for this format
- return <<<OET
- <span class="mediaplugin mediaplugin_qt">
- $printlink <br />
- <object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" $size>
- <param name="pluginspage" value="http://www.apple.com/quicktime/download/" />
- <param name="src" value="$url" />
- <param name="controller" value="true" />
- <param name="loop" value="true" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- <!--[if !IE]>-->
- <object data="$url" type="$mimetype" $size>
- <param name="src" value="$url" />
- <param name="pluginurl" value="http://www.apple.com/quicktime/download/" />
- <param name="controller" value="true" />
- <param name="loop" value="true" />
- <param name="autoplay" value="false" />
- <param name="autostart" value="false" />
- <param name="scale" value="aspect" />
- </object>
- <!--<![endif]-->
- </object></span>
- OET;
- }