MDL-9151 HTML Purifier cleaning support - enable switch is in experimental section

MDL-9435 Reviewved url cleaning in redirect()

lib/htmlpurifier/HTMLPurifier/HTMLModule/Image.php

@@ -0,0 +1,38 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+
+require_once 'HTMLPurifier/AttrDef/URI.php';
+require_once 'HTMLPurifier/AttrTransform/ImgRequired.php';
+
+/**
+ * XHTML 1.1 Image Module provides basic image embedding.
+ * @note There is specialized code for removing empty images in
+ *       HTMLPurifier_Strategy_RemoveForeignElements
+ */
+class HTMLPurifier_HTMLModule_Image extends HTMLPurifier_HTMLModule
+{
+    
+    var $name = 'Image';
+    var $elements = array('img');
+    var $info = array();
+    var $content_sets = array('Inline' => 'img');
+    
+    function HTMLPurifier_HTMLModule_Image() {
+        $this->info['img'] = new HTMLPurifier_ElementDef();
+        $this->info['img']->attr = array(
+            0 => array('Common'),
+            'alt' => 'Text',
+            'height' => 'Length',
+            'longdesc' => 'URI', 
+            'src' => new HTMLPurifier_AttrDef_URI(true), // embedded
+            'width' => 'Length'
+        );
+        $this->info['img']->content_model_type = 'empty';
+        $this->info['img']->attr_transform_post[] =
+            new HTMLPurifier_AttrTransform_ImgRequired();
+    }
+    
+}
+
+?>