[1.7.0] Implement Cleanup decorator

- Create generic DecoratorHarness
- Name decorators, so that they can be overridden or removed
- Add setup function to definition cache factory

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1118 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/DefinitionCacheFactory.php

@@ -24,6 +24,13 @@ class HTMLPurifier_DefinitionCacheFactory
     var $caches = array('Serializer' => array());
     var $decorators = array();
     
+    /**
+     * Initialize default decorators
+     */
+    function setup() {
+        $this->addDecorator('Cleanup');
+    }
+    
     /**
      * Retrieves an instance of global definition cache factory.
      * @static
@@ -34,6 +41,7 @@ class HTMLPurifier_DefinitionCacheFactory
             $instance = $prototype;
         } elseif ($instance === null || $prototype === true) {
             $instance = new HTMLPurifier_DefinitionCacheFactory();
+            $instance->setup();
         }
         return $instance;
     }
@@ -74,7 +82,7 @@ class HTMLPurifier_DefinitionCacheFactory
             $class = "HTMLPurifier_DefinitionCache_Decorator_$decorator";
             $decorator = new $class;
         }
-        $this->decorators[] = $decorator;
+        $this->decorators[$decorator->name] = $decorator;
     }
     
 }