Merge 108134

Source/WebCore/svg/animation/SVGSMILElement.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 36 matching lines @@
     virtual void parseMappedAttribute(Attribute*);
     virtual void attributeChanged(Attribute*, bool preserveDecls);
     virtual void insertedIntoDocument();
     virtual void removedFromDocument();
     
     virtual bool hasValidAttributeType() = 0;
 
     SMILTimeContainer* timeContainer() const { return m_timeContainer.get(); }
 
     SVGElement* targetElement();
-    void resetTargetElement() { m_targetElement = 0; }
+    void resetTargetElement();
     const QualifiedName& attributeName() const { return m_attributeName; }
 
     void beginByLinkActivation();
 
     enum Restart {
         RestartAlways,
         RestartWhenNotActive,
         RestartNever
     };
 
@@ skipping 39 matching lines @@
     virtual bool isAdditive() const = 0;
     virtual void resetToBaseValue(const String&) = 0;
     virtual void applyResultsToTarget() = 0;
 
 protected:
     void addBeginTime(SMILTime eventTime, SMILTime endTime);
     void addEndTime(SMILTime eventTime, SMILTime endTime);
 
     void setInactive() { m_activeState = Inactive; }
 
+    // Sub-classes may need to take action when the target is changed.
+    virtual void targetElementDidChange(SVGElement*) { }
+
 private:
     virtual void startedActiveInterval() = 0;
     virtual void updateAnimation(float percent, unsigned repeat, SVGSMILElement* resultElement) = 0;
     virtual void endedActiveInterval() = 0;
 
     enum BeginOrEnd {
         Begin,
         End
     };
     
@@ skipping 96 matching lines @@
     mutable SMILTime m_cachedMin;
     mutable SMILTime m_cachedMax;
 
     friend class ConditionEventListener;
 };
 
 }
 
 #endif // ENABLE(SVG)
 #endif // SVGSMILElement_h
-