filter/mediaplugin/filter.php

   1 <?php // $Id$
   2 //////////////////////////////////////////////////////////////
   3 //  Media plugin filtering
   4 //
   5 //  This filter will replace any links to a media file with
   6 //  a media plugin that plays that media inline
   7 //
   8 //  To activate this filter, add a line like this to your
   9 //  list of filters in your Filter configuration:
  10 //
  11 //  filter/mediaplugin/filter.php
  12 //
  13 //////////////////////////////////////////////////////////////
  14
  15 /// This is the filtering function itself.  It accepts the
  16 /// courseid and the text to be filtered (in HTML form).
  17
  18 require_once($CFG->libdir.'/filelib.php');
  19
  20 function mediaplugin_filter($courseid, $text) {
  21     global $CFG;
  22
  23     include 'defaultsettings.php';
  24
  25     // We're using the UFO technique for flash to attain XHTML Strict 1.0
  26     // See: http://www.bobbyvandersluis.com/ufo/
  27
  28     if ($CFG->filter_mediaplugin_enable_mp3) {
  29         $search = '/<a.*?href="([^<]+\.mp3)"[^>]*>.*?<\/a>/is';
  30         $text = preg_replace_callback($search, 'mediaplugin_filter_mp3_callback', $text);
  31     }
  32
  33     if ($CFG->filter_mediaplugin_enable_swf) {
  34         $search = '/<a.*?href="([^<]+\.swf)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  35         $text = preg_replace_callback($search, 'mediaplugin_filter_swf_callback', $text);
  36     }
  37
  38     if ($CFG->filter_mediaplugin_enable_flv) {
  39         $search = '/<a.*?href="([^<]+\.flv)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  40         $text = preg_replace_callback($search, 'mediaplugin_filter_flv_callback', $text);
  41     }
  42
  43     if ($CFG->filter_mediaplugin_enable_mov) {
  44         $search = '/<a.*?href="([^<]+\.mov)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  45         $text = preg_replace_callback($search, 'mediaplugin_filter_qt_callback', $text);
  46     }
  47
  48     if ($CFG->filter_mediaplugin_enable_wmv) {
  49         $search = '/<a.*?href="([^<]+\.wmv)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  50         $text = preg_replace_callback($search, 'mediaplugin_filter_wmp_callback', $text);
  51     }
  52
  53     if ($CFG->filter_mediaplugin_enable_mpg) {
  54         $search = '/<a.*?href="([^<]+\.mpe?g)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  55         $text = preg_replace_callback($search, 'mediaplugin_filter_qt_callback', $text);
  56     }
  57
  58     if ($CFG->filter_mediaplugin_enable_avi) {
  59         $search = '/<a.*?href="([^<]+\.avi)(\?d=([\d]{1,3}%?)x([\d]{1,3}%?))?"[^>]*>.*?<\/a>/is';
  60         $text = preg_replace_callback($search, 'mediaplugin_filter_wmp_callback', $text);
  61     }
  62
  63     if ($CFG->filter_mediaplugin_enable_ram) {
  64         $search = '/<a.*?href="([^<]+\.ram)"[^>]*>.*?<\/a>/is';
  65         $text = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $text);
  66     }
  67
  68     if ($CFG->filter_mediaplugin_enable_rpm) {
  69         $search = '/<a.*?href="([^<]+\.rpm)"[^>]*>.*?<\/a>/is';
  70         $text = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $text);
  71     }
  72
  73     if ($CFG->filter_mediaplugin_enable_rm) {
  74         $search = '/<a.*?href="([^<]+\.rm)"[^>]*>.*?<\/a>/is';
  75         $text = preg_replace_callback($search, 'mediaplugin_filter_real_callback', $text);
  76     }
  77
  78     return $text;
  79 }
  80
  81 ///===========================
  82 /// callback filter functions
  83
  84 function mediaplugin_filter_mp3_callback($link) {
  85     global $CFG, $THEME;
  86
  87     if (!empty($THEME->filter_mediaplugin_colors)) {
  88         $c = $THEME->filter_mediaplugin_colors;   // You can set this up in your theme/xxx/config.php
  89     } else {
  90         $c = 'bgColour=000000&btnColour=ffffff&btnBorderColour=cccccc&iconColour=000000&'.
  91              'iconOverColour=00cc00&trackColour=cccccc&handleColour=ffffff&loaderColour=ffffff&'.
  92              'waitForPlay=yes';
  93     }
  94     $c = htmlentities($c);
  95
  96     static $count = 0;
  97     $count++;
  98     $id = 'filter_mp3_'.time().$count; //we need something unique because it might be stored in text cache
  99
 100     $url = addslashes_js($link[1]);
 101
 102     return $link[0].
 103 '<span class="mediaplugin mediaplugin_mp3" id="'.$id.'">('.get_string('mp3audio', 'mediaplugin').')</span>
 104 <script type="text/javascript">
 105 //<![CDATA[
 106   var FO = { movie:"'.$CFG->wwwroot.'/filter/mediaplugin/mp3player.swf?src='.$url.'",
 107     width:"90", height:"15", majorversion:"6", build:"40", flashvars:"'.$c.'", quality: "high" };
 108   UFO.create(FO, "'.$id.'");
 109 //]]>
 110 </script>';
 111 }
 112
 113 function mediaplugin_filter_swf_callback($link) {
 114     static $count = 0;
 115     $count++;
 116     $id = 'filter_swf_'.time().$count; //we need something unique because it might be stored in text cache
 117
 118     $width  = empty($link[3]) ? '400' : $link[3];
 119     $height = empty($link[4]) ? '300' : $link[4];
 120     $url = addslashes_js($link[1]);
 121
 122     return $link[0].
 123 '<span class="mediaplugin mediaplugin_swf" id="'.$id.'">('.get_string('flashanimation', 'mediaplugin').')</span>
 124 <script type="text/javascript">
 125 //<![CDATA[
 126   var FO = { movie:"'.$url.'", width:"'.$width.'", height:"'.$height.'", majorversion:"6", build:"40",
 127     allowscriptaccess:"never", quality: "high" };
 128   UFO.create(FO, "'.$id.'");
 129 //]]>
 130 </script>';
 131 }
 132
 133 function mediaplugin_filter_flv_callback($link) {
 134     global $CFG;
 135
 136     static $count = 0;
 137     $count++;
 138     $id = 'filter_flv_'.time().$count; //we need something unique because it might be stored in text cache
 139
 140     $width  = empty($link[3]) ? '480' : $link[3];
 141     $height = empty($link[4]) ? '360' : $link[4];
 142     $url = addslashes_js($link[1]);
 143
 144     return $link[0].
 145 '<span class="mediaplugin mediaplugin_flv" id="'.$id.'">('.get_string('flashvideo', 'mediaplugin').')</span>
 146 <script type="text/javascript">
 147 //<![CDATA[
 148   var FO = { movie:"'.$CFG->wwwroot.'/filter/mediaplugin/flvplayer.swf?file='.$url.'",
 149     width:"'.$width.'", height:"'.$height.'", majorversion:"6", build:"40",
 150     allowscriptaccess:"never", quality: "high" };
 151   UFO.create(FO, "'.$id.'");
 152 //]]>
 153 </script>';
 154 }
 155
 156 function mediaplugin_filter_real_callback($link, $autostart=false) {
 157     $url = addslashes_js($link[1]);
 158     $mimetype = mimeinfo('type', $url);
 159     $autostart = $autostart ? 'true' : 'false';
 160
 161 // embed kept for now see MDL-8674
 162     return $link[0].
 163 '<span class="mediaplugin mediaplugin_real">
 164 <script type="text/javascript">
 165 //<![CDATA[
 166 document.write(\'<object classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="240" height="180">\\
 167   <param name="src" value="'.$url.'" />\\
 168   <param name="autostart" value="'.$autostart.'" />\\
 169   <param name="controls" value="imagewindow" />\\
 170   <param name="console" value="video" />\\
 171   <param name="loop" value="true" />\\
 172   <embed src="'.$url.'" width=240" height="180" loop="true" type="'.$mimetype.'" controls="imagewindow" console="video" autostart="'.$autostart.'" />\\
 173   </object><br />\\
 174   <object classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="240" height="30">\\
 175   <param name="src" value="'.$url.'" />\\
 176   <param name="autostart" value="'.$autostart.'" />\\
 177   <param name="controls" value="ControlPanel" />\\
 178   <param name="console" value="video" />\\
 179   <embed src="'.$url.'" width="240" height="30" controls="ControlPanel" type="'.$mimetype.'" console="video" autostart="'.$autostart.'" />\\
 180   </object>\');
 181 //]]>
 182 </script></span>';
 183 }
 184
 185 /**
 186  * Embed video using window media player if available
 187  */
 188 function mediaplugin_filter_wmp_callback($link, $autostart=false) {
 189     $url = $link[1];
 190     if (empty($link[3]) or empty($link[4])) {
 191         $mpsize = '';
 192         $size = 'width="300" height="260"';
 193         $autosize = 'true';
 194     } else {
 195         $size = 'width="'.$link[3].'" height="'.$link[4].'"';
 196         $mpsize = $size;
 197         $autosize = 'false';
 198     }
 199     $mimetype = mimeinfo('type', $url);
 200     $autostart = $autostart ? 'true' : 'false';
 201
 202     return $link[0].
 203 '<span class="mediaplugin mediaplugin_wmp">
 204 <object classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" '.$mpsize.'
 205   standby="Loading Microsoft(R) Windows(R) Media Player components..."
 206   type="application/x-oleobject">
 207  <param name="Filename" value="'.$url.'" />
 208  <param name="src" value="'.$url.'" />
 209  <param name="url" value="'.$url.'" />
 210  <param name="ShowControls" value="true" />
 211  <param name="AutoRewind" value="true" />
 212  <param name="AutoStart" value="'.$autostart.'" />
 213  <param name="Autosize" value="'.$autosize.'" />
 214  <param name="EnableContextMenu" value="true" />
 215  <param name="TransparentAtStart" value="false" />
 216  <param name="AnimationAtStart" value="false" />
 217  <param name="ShowGotoBar" value="false" />
 218  <param name="EnableFullScreenControls" value="true" />
 219 <!--[if !IE]>-->
 220   <object data="'.$url.'" type="'.$mimetype.'" '.$size.'>
 221    <param name="src" value="'.$url.'" />
 222    <param name="controller" value="true" />
 223    <param name="autoplay" value="'.$autostart.'" />
 224    <param name="autostart" value="'.$autostart.'" />
 225    <param name="resize" value="scale" />
 226   </object>
 227 <!--<![endif]-->
 228 </object></span>';
 229 }
 230
 231 function mediaplugin_filter_qt_callback($link, $autostart=false) {
 232     $url = $link[1];
 233     if (empty($link[3]) or empty($link[4])) {
 234         $size = 'width="280" height="210"';
 235     } else {
 236         $size = 'width="'.$link[3].'" height="'.$link[4].'"';
 237     }
 238     $mimetype = mimeinfo('type', $url);
 239     $autostart = $autostart ? 'true' : 'false';
 240
 241     return $link[0].
 242 '<span class="mediaplugin mediaplugin_qt">
 243 <object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"
 244   codebase="http://www.apple.com/qtactivex/qtplugin.cab" '.$size.'>
 245  <param name="pluginspage" value="http://www.apple.com/quicktime/download/" />
 246  <param name="src" value="'.$url.'" />
 247  <param name="coltroller" value="true" />
 248  <param name="loop" value="true" />
 249  <param name="autoplay" value="'.$autostart.'" />
 250  <param name="autostart" value="'.$autostart.'" />
 251  <param name="scale" value="aspect" />
 252 <!--[if !IE]>-->
 253   <object data="'.$url.'" type="'.$mimetype.'" '.$size.'>
 254    <param name="src" value="'.$url.'" />
 255    <param name="pluginurl" value="http://www.apple.com/quicktime/download/" />
 256    <param name="controller" value="true" />
 257    <param name="loop" value="true" />
 258    <param name="autoplay" value="'.$autostart.'" />
 259    <param name="autostart" value="'.$autostart.'" />
 260    <param name="scale" value="aspect" />
 261   </object>
 262 <!--<![endif]-->
 263 </object></span>';
 264 }
 265
 266 ?>