Enable class attribute to add CSS classes

GoogleCodePrettify.body.php

@@ -2,13 +2,16 @@
 
 class GoogleCodePrettify {
   private static $prettified = false;
-  
+
   public static function parserHook($text, $args = array(), $parser) {
     $pre_classes = '';
     if (isset($args['lang']) && $args['lang']) {
       $lang = $args['lang'];
       $pre_classes .= " lang-$lang";
     }
+    if (isset($args['class']) && $args['class']) {
+      $pre_classes .= ' '. $args['class'];
+    }
     self::$prettified = true;
 
     return "<pre class=\"prettyprint$pre_classes\">$text</pre>";

GoogleCodePrettify.php

@@ -55,7 +55,7 @@ function efGoogleCodePrettify_Setup( &$parser ) {
   'name' => 'GoogleCodePrettify',
   'author' => 'Akzhan Abdulin',
   'url' => 'http://www.mediawiki.org/wiki/Extension:GoogleCodePrettify',
-  'version' => '0.1',
+  'version' => '0.2',
   'descriptionmsg' => 'google-code-prettify-description'
 );
 

README.md

@@ -28,6 +28,10 @@ That's all.
 
 Google Code Prettify automatically recognizes language of source code. But you can set it using *lang* attribute.
 
+## class attribute
+
+You can add additional CSS class names to generated **pre** tags using *class* attribute. This is useful, for example, to add *mw-collapsible* class.
+
 ## Configuration
 
 ### Enable handling of **source** tag.