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

Source/core/svg/SVGFontFaceSrcElement.cpp

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 
 #if ENABLE(SVG_FONTS)
 #include "core/svg/SVGFontFaceSrcElement.h"
 
 #include "SVGNames.h"
 #include "core/css/CSSFontFaceSrcValue.h"
 #include "core/css/CSSValueList.h"
+#include "core/dom/ElementTraversal.h"
 #include "core/svg/SVGFontFaceElement.h"
 #include "core/svg/SVGFontFaceNameElement.h"
 #include "core/svg/SVGFontFaceUriElement.h"
 
 namespace WebCore {
 
 using namespace SVGNames;
 
 inline SVGFontFaceSrcElement::SVGFontFaceSrcElement(Document& document)
     : SVGElement(font_face_srcTag, document)
 {
     ScriptWrappable::init(this);
 }
 
 PassRefPtr<SVGFontFaceSrcElement> SVGFontFaceSrcElement::create(Document& document)
 {
     return adoptRef(new SVGFontFaceSrcElement(document));
 }
 
 PassRefPtrWillBeRawPtr<CSSValueList> SVGFontFaceSrcElement::srcValue() const
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
-    for (Node* child = firstChild(); child; child = child->nextSibling()) {
+    for (SVGElement* element = Traversal<SVGElement>::firstChild(*this); element; element = Traversal<SVGElement>::nextSibling(*element)) {
         RefPtrWillBeRawPtr<CSSFontFaceSrcValue> srcValue;
-        if (child->hasTagName(font_face_uriTag))
-            srcValue = toSVGFontFaceUriElement(child)->srcValue();
-        else if (child->hasTagName(font_face_nameTag))
-            srcValue = toSVGFontFaceNameElement(child)->srcValue();
+        if (isSVGFontFaceUriElement(*element))
+            srcValue = toSVGFontFaceUriElement(*element).srcValue();
+        else if (isSVGFontFaceNameElement(*element))
+            srcValue = toSVGFontFaceNameElement(*element).srcValue();
 
         if (srcValue && srcValue->resource().length())
             list->append(srcValue);
     }
     return list;
 }
 
 void SVGFontFaceSrcElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
-    if (parentNode() && parentNode()->hasTagName(font_faceTag))
-        toSVGFontFaceElement(parentNode())->rebuildFontFace();
+    if (isSVGFontFaceElement(parentNode()))
+        toSVGFontFaceElement(*parentNode()).rebuildFontFace();
 }
 
 }
 
 #endif // ENABLE(SVG_FONTS)