Add support for SVG Clip paths in HTML

Source/core/svg/SVGClipPathElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 19 matching lines @@
 inline SVGClipPathElement::SVGClipPathElement(Document& document)
     : SVGGraphicsElement(SVGNames::clipPathTag, document)
     , m_clipPathUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(this, SVGNames::clipPathUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE))
 {
     ScriptWrappable::init(this);
     addToPropertyMap(m_clipPathUnits);
 }
 
 DEFINE_NODE_FACTORY(SVGClipPathElement)
 
+void SVGClipPathElement::trace(Visitor* visitor)
+{
+#if ENABLE(OILPAN)
+    visitor->trace(m_clientsToAdd);
+#endif
+    SVGGraphicsElement::trace(visitor);
+}
+
 bool SVGClipPathElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty())
         supportedAttributes.add(SVGNames::clipPathUnitsAttr);
 
     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
 }
 
 void SVGClipPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
@@ skipping 33 matching lines @@
 
     if (change.byParser)
         return;
 
     if (RenderObject* object = renderer())
         object->setNeedsLayoutAndFullPaintInvalidation();
 }
 
 RenderObject* SVGClipPathElement::createRenderer(RenderStyle*)
 {
-    return new RenderSVGResourceClipper(this);
+    RenderSVGResourceClipper* renderer = new RenderSVGResourceClipper(this);
+
+    WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator layerEnd = m_clientsToAdd.end();
+    for (WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator it = m_clientsToAdd.begin(); it != layerEnd; ++it)
+        renderer->addClientRenderLayer(it->get());
+    m_clientsToAdd.clear();
+
+    return renderer;
+}
+
+void SVGClipPathElement::addClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.add(client);
+}
+
+void SVGClipPathElement::removeClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.remove(client);
 }
 
 }