Refactoring: Decouple ScriptElement from HTMLScriptElement and SVGScriptElement.

Source/core/svg/SVGScriptElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 25 matching lines @@
 DEFINE_ANIMATED_STRING(SVGScriptElement, XLinkNames::hrefAttr, Href, href)
 DEFINE_ANIMATED_BOOLEAN(SVGScriptElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
 
 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGScriptElement)
     REGISTER_LOCAL_ANIMATED_PROPERTY(href)
     REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
 END_REGISTER_ANIMATED_PROPERTIES
 
 inline SVGScriptElement::SVGScriptElement(const QualifiedName& tagName, Document* document, bool wasInsertedByParser, bool alreadyStarted)
     : SVGElement(tagName, document)
-    , ScriptElement(this, wasInsertedByParser, alreadyStarted)
     , m_svgLoadEventTimer(this, &SVGElement::svgLoadEventTimerFired)
+    , m_scriptElement(ScriptElement::create(this, wasInsertedByParser, alreadyStarted))
 {
     ASSERT(hasTagName(SVGNames::scriptTag));
     ScriptWrappable::init(this);
     registerAnimatedPropertiesForSVGScriptElement();
 }
 
 PassRefPtr<SVGScriptElement> SVGScriptElement::create(const QualifiedName& tagName, Document* document, bool insertedByParser)
 {
     return adoptRef(new SVGScriptElement(tagName, document, insertedByParser, false));
 }
@@ skipping 41 matching lines @@
         SVGElement::svgAttributeChanged(attrName);
         return;
     }
 
     SVGElementInstance::InvalidationGuard invalidationGuard(this);
 
     if (attrName == SVGNames::typeAttr || attrName == HTMLNames::onerrorAttr)
         return;
 
     if (SVGURIReference::isKnownAttribute(attrName)) {
-        handleSourceAttribute(href());
+        if (m_scriptElement)
+            m_scriptElement->handleSourceAttribute(href());
         return;
     }
 
     if (SVGExternalResourcesRequired::handleAttributeChange(this, attrName))
         return;
 
     ASSERT_NOT_REACHED();
 }
 
 Node::InsertionNotificationRequest SVGScriptElement::insertedInto(ContainerNode* rootParent)
 {
     SVGElement::insertedInto(rootParent);
-    ScriptElement::insertedInto(rootParent);
+    if (m_scriptElement)
+        m_scriptElement->insertedInto(rootParent);
     if (rootParent->inDocument())
         SVGExternalResourcesRequired::insertedIntoDocument(this);
     return InsertionDone;
 }
 
 void SVGScriptElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
-    ScriptElement::childrenChanged();
+    if (m_scriptElement)
+        m_scriptElement->childrenChanged();
 }
 
 bool SVGScriptElement::isURLAttribute(const Attribute& attribute) const
 {
     return attribute.name() == sourceAttributeValue();
 }
 
 void SVGScriptElement::finishParsingChildren()
 {
     SVGElement::finishParsingChildren();
@@ skipping 57 matching lines @@
     return false;
 }
 
 bool SVGScriptElement::hasSourceAttribute() const
 {
     return hasAttribute(XLinkNames::hrefAttr);
 }
 
 PassRefPtr<Element> SVGScriptElement::cloneElementWithoutAttributesAndChildren()
 {
-    return adoptRef(new SVGScriptElement(tagQName(), document(), false, alreadyStarted()));
+    return adoptRef(new SVGScriptElement(tagQName(), document(), false, m_scriptElement && m_scriptElement->alreadyStarted()));
 }
 
 }