SVG: Move/rename reference management to SVGElement

Source/core/svg/SVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Apple Inc. 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 22 matching lines @@
 
 namespace WebCore {
 
 class AffineTransform;
 class CSSCursorImageValue;
 class Document;
 class SVGAnimatedPropertyBase;
 class SubtreeLayoutScope;
 class SVGCursorElement;
 class SVGDocumentExtensions;
+class SVGElement;
 class SVGElementRareData;
 class SVGFitToViewBox;
 class SVGSVGElement;
 
 void mapAttributeToCSSProperty(HashMap<StringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName);
 
+typedef WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> > SVGElementSet;
+
 class SVGElement : public Element {
 public:
     virtual ~SVGElement();
     virtual void attach(const AttachContext&) OVERRIDE;
     virtual void detach(const AttachContext&) OVERRIDE;
 
     virtual short tabIndex() const OVERRIDE;
     virtual bool supportsFocus() const OVERRIDE { return false; }
 
     bool isOutermostSVGSVGElement() const;
@@ skipping 93 matching lines @@
 
     bool isContextElement() const { return m_isContextElement; }
     void setContextElement() { m_isContextElement = true; }
 
     void addToPropertyMap(PassRefPtr<SVGAnimatedPropertyBase>);
 
     SVGAnimatedString* className() { return m_className.get(); }
 
     bool inUseShadowTree() const;
 
+    SVGElementSet* setOfIncomingReferences() const;
+    void addReferenceTo(SVGElement*);
+    void rebuildAllIncomingReferences();
+    void removeAllIncomingReferences();
+    void removeAllOutgoingReferences();
+
     class InvalidationGuard {
         STACK_ALLOCATED();
         WTF_MAKE_NONCOPYABLE(InvalidationGuard);
     public:
         InvalidationGuard(SVGElement* element) : m_element(element) { }
         ~InvalidationGuard() { m_element->invalidateInstances(); }
 
     private:
         RawPtrWillBeMember<SVGElement> m_element;
     };
@@ skipping 28 matching lines @@
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
 
     static CSSPropertyID cssPropertyIdForSVGAttributeName(const QualifiedName&);
     void updateRelativeLengthsInformation() { updateRelativeLengthsInformation(selfHasRelativeLengths(), this); }
     void updateRelativeLengthsInformation(bool hasRelativeLengths, SVGElement*);
 
     virtual bool selfHasRelativeLengths() const { return false; }
 
-    // FIXME: This "friend" is temporary to keep the current |SVGDocumentExtensions::*ReferencesFor*| methods. This will be removed after they are moved to SVGElement.
-    friend class SVGDocumentExtensions;
     SVGElementRareData* ensureSVGRareData();
     inline bool hasSVGRareData() const { return m_SVGRareData; }
     inline SVGElementRareData* svgRareData() const
     {
         ASSERT(m_SVGRareData);
         return m_SVGRareData.get();
     }
 
     // SVGFitToViewBox::parseAttribute uses reportAttributeParsingError.
     friend class SVGFitToViewBox;
@@ skipping 39 matching lines @@
     static bool equal(const QualifiedName& a, const QualifiedName& b) { return a.matches(b); }
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(SVGElement, isSVGElement());
 
 template <> inline bool isElementOfType<const SVGElement>(const Node& node) { return node.isSVGElement(); }
 
 }
 
 #endif