mirror of
https://github.com/moodle/moodle.git
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334 lines
13 KiB
PHP
334 lines
13 KiB
PHP
<<<<<<< filter.php
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<?php // $Id$
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//////////////////////////////////////////////////////////////
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// Media plugin filtering
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//
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// This filter will replace any links to a media file with
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// a media plugin that plays that media inline
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//
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// To activate this filter, add a line like this to your
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// list of filters in your Filter configuration:
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//
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// filter/mediaplugin/filter.php
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//
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//////////////////////////////////////////////////////////////
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/// This is the filtering function itself. It accepts the
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/// courseid and the text to be filtered (in HTML form).
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require_once($CFG->libdir.'/filelib.php');
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class mediaplugin_filter extends moodle_text_filter {
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private $eolas_fix_applied = false;
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function filter($text) {
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global $CFG;
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// You should never modify parameters passed to a method or function, it's BAD practice. Create a copy instead.
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// The reason is that you must always be able to refer to the original parameter that was passed.
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// For this reason, I changed $text = preg_replace(..,..,$text) into $newtext = preg.... (NICOLAS CONNAULT)
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// Thanks to Pablo Etcheverry for pointing this out! MDL-10177
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// We're using the UFO technique for flash to attain XHTML Strict 1.0
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// See: http://www.bobbyvandersluis.com/ufo/
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if (!is_string($text)) {
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// non string data can not be filtered anyway
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return $text;
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}
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$newtext = $text; // fullclone is slow and not needed here
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if ($CFG->filter_mediaplugin_enable_mp3) {
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$search = '/<a.*?href="([^<]+\.mp3)"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_mp3_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_swf) {
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$search = '/<a.*?href="([^<]+\.swf)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_swf_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_flv) {
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$search = '/<a.*?href="([^<]+\.flv)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_flv_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_mov) {
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$search = '/<a.*?href="([^<]+\.mov)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_qt_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_wmv) {
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$search = '/<a.*?href="([^<]+\.wmv)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_wmp_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_mpg) {
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$search = '/<a.*?href="([^<]+\.mpe?g)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_qt_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_avi) {
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$search = '/<a.*?href="([^<]+\.avi)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_wmp_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_ram) {
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$search = '/<a.*?href="([^<]+\.ram)"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_rpm) {
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$search = '/<a.*?href="([^<]+\.rpm)"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $newtext);
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}
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if ($CFG->filter_mediaplugin_enable_rm) {
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$search = '/<a.*?href="([^<]+\.rm)"[^>]*>.*?<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $newtext);
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}
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if (!empty($CFG->filter_mediaplugin_enable_youtube)) {
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$search = '/<a.*?href="([^<]*)youtube.com\/watch\?v=([^"]*)"[^>]*>(.*?)<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_youtube_callback', $newtext);
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$search = '/<a.*?href="([^<]*)youtube.com\/v\/([^"]*)"[^>]*>(.*?)<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_youtube_callback', $newtext);
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}
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if (!empty($CFG->filter_mediaplugin_enable_img)) {
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$search = '/<a.*?href="([^<]+\.jpg)"[^>]*>(.*?)<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_img_callback', $newtext);
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$search = '/<a.*?href="([^<]+\.png)"[^>]*>(.*?)<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_img_callback', $newtext);
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$search = '/<a.*?href="([^<]+\.gif)"[^>]*>(.*?)<\/a>/is';
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$newtext = preg_replace_callback($search, 'mediaplugin_filter_img_callback', $newtext);
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}
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if (empty($newtext) or $newtext === $text) {
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// error or not filtered
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unset($newtext);
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return $text;
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}
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if (!$this->eolas_fix_applied) {
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$newtext .= '<script defer="defer" src="' . $CFG->wwwroot . '/filter/mediaplugin/eolas_fix.js" type="text/javascript">// <![CDATA[ ]]></script>';
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$this->eolas_fix_applied = true;
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}
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return $newtext;
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}
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}
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///===========================
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/// callback filter functions
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function mediaplugin_filter_mp3_callback($link) {
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global $CFG, $THEME;
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if (!empty($THEME->filter_mediaplugin_colors)) {
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$c = $THEME->filter_mediaplugin_colors; // You can set this up in your theme/xxx/config.php
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} else {
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$c = 'bgColour=000000&btnColour=ffffff&btnBorderColour=cccccc&iconColour=000000&'.
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'iconOverColour=00cc00&trackColour=cccccc&handleColour=ffffff&loaderColour=ffffff&'.
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'waitForPlay=yes';
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}
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$c = htmlentities($c);
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static $count = 0;
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$count++;
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$id = 'filter_mp3_'.time().$count; //we need something unique because it might be stored in text cache
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$url = addslashes_js($link[1]);
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return $link[0].
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'<span class="mediaplugin mediaplugin_mp3" id="'.$id.'">('.get_string('mp3audio', 'mediaplugin').')</span>
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<script type="text/javascript">
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//<![CDATA[
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var FO = { movie:"'.$CFG->wwwroot.'/filter/mediaplugin/mp3player.swf?src='.$url.'",
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width:"90", height:"15", majorversion:"6", build:"40", flashvars:"'.$c.'", quality: "high" };
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UFO.create(FO, "'.$id.'");
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//]]>
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</script>';
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}
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function mediaplugin_filter_swf_callback($link) {
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static $count = 0;
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$count++;
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$id = 'filter_swf_'.time().$count; //we need something unique because it might be stored in text cache
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$width = empty($link[3]) ? '400' : $link[3];
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$height = empty($link[4]) ? '300' : $link[4];
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$url = addslashes_js($link[1]);
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return $link[0].
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'<span class="mediaplugin mediaplugin_swf" id="'.$id.'">('.get_string('flashanimation', 'mediaplugin').')</span>
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<script type="text/javascript">
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//<![CDATA[
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var FO = { movie:"'.$url.'", width:"'.$width.'", height:"'.$height.'", majorversion:"6", build:"40",
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allowscriptaccess:"never", quality: "high" };
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UFO.create(FO, "'.$id.'");
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//]]>
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</script>';
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}
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function mediaplugin_filter_flv_callback($link) {
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global $CFG;
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static $count = 0;
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$count++;
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$id = 'filter_flv_'.time().$count; //we need something unique because it might be stored in text cache
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$width = empty($link[3]) ? '480' : $link[3];
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$height = empty($link[4]) ? '360' : $link[4];
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$url = addslashes_js($link[1]);
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return $link[0].
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'<span class="mediaplugin mediaplugin_flv" id="'.$id.'">('.get_string('flashvideo', 'mediaplugin').')</span>
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<script type="text/javascript">
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//<![CDATA[
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var FO = { movie:"'.$CFG->wwwroot.'/filter/mediaplugin/flvplayer.swf?file='.$url.'",
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width:"'.$width.'", height:"'.$height.'", majorversion:"6", build:"40",
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allowscriptaccess:"never", quality: "high" };
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UFO.create(FO, "'.$id.'");
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//]]>
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</script>';
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}
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function mediaplugin_filter_real_callback($link, $autostart=false) {
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$url = addslashes_js($link[1]);
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$mimetype = mimeinfo('type', $url);
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$autostart = $autostart ? 'true' : 'false';
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// embed kept for now see MDL-8674
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return $link[0].
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'<span class="mediaplugin mediaplugin_real">
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<script type="text/javascript">
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//<![CDATA[
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document.write(\'<object classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="240" height="180">\\
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<param name="src" value="'.$url.'" />\\
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<param name="autostart" value="'.$autostart.'" />\\
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<param name="controls" value="imagewindow" />\\
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<param name="console" value="video" />\\
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<param name="loop" value="true" />\\
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<embed src="'.$url.'" width="240" height="180" loop="true" type="'.$mimetype.'" controls="imagewindow" console="video" autostart="'.$autostart.'" />\\
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</object><br />\\
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<object classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="240" height="30">\\
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<param name="src" value="'.$url.'" />\\
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<param name="autostart" value="'.$autostart.'" />\\
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<param name="controls" value="ControlPanel" />\\
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<param name="console" value="video" />\\
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<embed src="'.$url.'" width="240" height="30" controls="ControlPanel" type="'.$mimetype.'" console="video" autostart="'.$autostart.'" />\\
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</object>\');
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//]]>
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</script></span>';
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}
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/**
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* Change links to Youtube into embedded Youtube videos
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*/
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function mediaplugin_filter_youtube_callback($link, $autostart=false) {
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$site = addslashes_js($link[1]);
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$url = addslashes_js($link[2]);
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$info = addslashes_js($link[3]);
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return '<object title="'.$info.'"
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class="mediaplugin mediaplugin_youtube" type="application/x-shockwave-flash"
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data="'.$site.'youtube.com/v/'.$url.'&fs=1&rel=0" width="425" height="344">'.
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'<param name="movie" value="'.$site.'youtube.com/v/'.$url.'&fs=1&rel=0" />'.
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'<param name="FlashVars" value="playerMode=embedded" />'.
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'<param name="wmode" value="transparent" />'.
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'<param name="allowFullScreen" value="true" />'.
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'</object>';
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}
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/**
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* Change links to images into embedded images
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*/
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function mediaplugin_filter_img_callback($link, $autostart=false) {
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$url = addslashes_js($link[1]);
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$info = addslashes_js($link[2]);
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return '<img class="mediaplugin mediaplugin_img" alt="" title="'.$info.'" src="'.$url.'" />';
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}
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/**
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* Embed video using window media player if available
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*/
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function mediaplugin_filter_wmp_callback($link, $autostart=false) {
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$url = $link[1];
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if (empty($link[3]) or empty($link[4])) {
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$mpsize = '';
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$size = 'width="300" height="260"';
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$autosize = 'true';
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} else {
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$size = 'width="'.$link[3].'" height="'.$link[4].'"';
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$mpsize = $size;
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$autosize = 'false';
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}
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$mimetype = mimeinfo('type', $url);
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$autostart = $autostart ? 'true' : 'false';
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return $link[0].
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'<span class="mediaplugin mediaplugin_wmp">
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<object classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" '.$mpsize.'
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standby="Loading Microsoft(R) Windows(R) Media Player components..."
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type="application/x-oleobject">
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<param name="Filename" value="'.$url.'" />
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<param name="src" value="'.$url.'" />
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<param name="url" value="'.$url.'" />
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<param name="ShowControls" value="true" />
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<param name="AutoRewind" value="true" />
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<param name="AutoStart" value="'.$autostart.'" />
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<param name="Autosize" value="'.$autosize.'" />
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<param name="EnableContextMenu" value="true" />
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<param name="TransparentAtStart" value="false" />
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<param name="AnimationAtStart" value="false" />
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<param name="ShowGotoBar" value="false" />
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<param name="EnableFullScreenControls" value="true" />
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<!--[if !IE]>-->
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<object data="'.$url.'" type="'.$mimetype.'" '.$size.'>
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<param name="src" value="'.$url.'" />
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<param name="controller" value="true" />
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<param name="autoplay" value="'.$autostart.'" />
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<param name="autostart" value="'.$autostart.'" />
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<param name="resize" value="scale" />
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</object>
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<!--<![endif]-->
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</object></span>';
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}
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function mediaplugin_filter_qt_callback($link, $autostart=false) {
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$url = $link[1];
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if (empty($link[3]) or empty($link[4])) {
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$size = 'width="280" height="210"';
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} else {
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$size = 'width="'.$link[3].'" height="'.$link[4].'"';
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}
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$mimetype = mimeinfo('type', $url);
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$autostart = $autostart ? 'true' : 'false';
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return $link[0].
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'<span class="mediaplugin mediaplugin_qt">
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<object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"
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codebase="http://www.apple.com/qtactivex/qtplugin.cab" '.$size.'>
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<param name="pluginspage" value="http://www.apple.com/quicktime/download/" />
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<param name="src" value="'.$url.'" />
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<param name="controller" value="true" />
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<param name="loop" value="true" />
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<param name="autoplay" value="'.$autostart.'" />
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<param name="autostart" value="'.$autostart.'" />
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<param name="scale" value="aspect" />
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<!--[if !IE]>-->
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<object data="'.$url.'" type="'.$mimetype.'" '.$size.'>
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<param name="src" value="'.$url.'" />
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<param name="pluginurl" value="http://www.apple.com/quicktime/download/" />
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<param name="controller" value="true" />
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<param name="loop" value="true" />
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<param name="autoplay" value="'.$autostart.'" />
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<param name="autostart" value="'.$autostart.'" />
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<param name="scale" value="aspect" />
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</object>
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<!--<![endif]-->
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</object></span>';
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}
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?>
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