Use isSVG*Element() helpers more in SVG code (Part 1)

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 221 matching lines @@
     // <title> elements are the title of the document, not a tooltip) so we instantly return.
     if (isOutermostSVGSVGElement())
         return String();
 
     // Walk up the tree, to find out whether we're inside a <use> shadow tree, to find the right title.
     if (isInShadowTree()) {
         Element* shadowHostElement = toShadowRoot(treeScope().rootNode()).host();
         // At this time, SVG nodes are not allowed in non-<use> shadow trees, so any shadow root we do
         // have should be a use. The assert and following test is here to catch future shadow DOM changes
         // that do enable SVG in a shadow tree.
-        ASSERT(!shadowHostElement || shadowHostElement->hasTagName(SVGNames::useTag));
-        if (shadowHostElement && shadowHostElement->hasTagName(SVGNames::useTag)) {
-            SVGUseElement* useElement = toSVGUseElement(shadowHostElement);
+        ASSERT(!shadowHostElement || isSVGUseElement(*shadowHostElement));
+        if (isSVGUseElement(shadowHostElement)) {
+            SVGUseElement& useElement = toSVGUseElement(*shadowHostElement);
 
             // If the <use> title is not empty we found the title to use.
-            String useTitle(useElement->title());
+            String useTitle(useElement.title());
             if (!useTitle.isEmpty())
                 return useTitle;
         }
     }
 
     // If we aren't an instance in a <use> or the <use> title was not found, then find the first
     // <title> child of this element.
     // If a title child was found, return the text contents.
     if (Element* titleElement = Traversal<SVGTitleElement>::firstChild(*this))
         return titleElement->innerText();
@@ skipping 250 matching lines @@
     for (HashSet<SVGElement*>::iterator it = m_elementsWithRelativeLengths.begin(); it != end; ++it) {
         if (*it != this)
             (*it)->invalidateRelativeLengthClients(layoutScope);
     }
 }
 
 SVGSVGElement* SVGElement::ownerSVGElement() const
 {
     ContainerNode* n = parentOrShadowHostNode();
     while (n) {
-        if (n->hasTagName(SVGNames::svgTag))
+        if (isSVGSVGElement(*n))
             return toSVGSVGElement(n);
 
         n = n->parentOrShadowHostNode();
     }
 
     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 (isSVGSVGElement(*n) || isSVGImageElement(*n) || isSVGSymbolElement(*n))
             return toSVGElement(n);
 
         n = n->parentOrShadowHostNode();
     }
 
     return 0;
 }
 
 SVGDocumentExtensions& SVGElement::accessDocumentSVGExtensions()
 {
@@ skipping 589 matching lines @@
         animatableAttributes.add(SVGNames::zAttr);
     }
 
     if (name == classAttr)
         return true;
 
     return animatableAttributes.contains(name);
 }
 #endif
 }