Introduce isSVGFontElement() and isSVGImageElement(), and use them

Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * 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
@@ skipping 23 matching lines @@
 #include "core/dom/DOMImplementation.h"
 #include "core/dom/Document.h"
 #include "core/dom/Event.h"
 #include "core/dom/NodeRenderingContext.h"
 #include "core/rendering/RenderObject.h"
 #include "core/svg/SVGCursorElement.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGElementInstance.h"
 #include "core/svg/SVGElementRareData.h"
 #include "core/svg/SVGGraphicsElement.h"
+#include "core/svg/SVGImageElement.h"
 #include "core/svg/SVGSVGElement.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 SVGElement::SVGElement(const QualifiedName& tagName, Document* document, ConstructionType constructionType)
     : Element(tagName, document, constructionType)
 {
     ScriptWrappable::init(this);
@@ skipping 150 matching lines @@
 
     return 0;
 }
 
 SVGElement* SVGElement::viewportElement() const
 {
     // This function needs shadow tree support - as RenderSVGContainer uses this function
     // to determine the "overflow" property. <use> on <symbol> wouldn't work otherwhise.
     ContainerNode* n = parentOrShadowHostNode();
     while (n) {
-        if (n->hasTagName(SVGNames::svgTag) || n->hasTagName(SVGNames::imageTag) || n->hasTagName(SVGNames::symbolTag))
+        if (n->hasTagName(SVGNames::svgTag) || isSVGImageElement(n) || n->hasTagName(SVGNames::symbolTag))
             return toSVGElement(n);
 
         n = n->parentOrShadowHostNode();
     }
 
     return 0;
 }
 
 SVGDocumentExtensions* SVGElement::accessDocumentSVGExtensions()
 {
@@ skipping 513 matching lines @@
     }
 
     if (name == classAttr)
         return isSVGStyledElement();
 
     return animatableAttributes.contains(name);
 }
 #endif
 
 }