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

Source/core/svg/SVGFEComponentTransferElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.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"
 
 #include "core/svg/SVGFEComponentTransferElement.h"
 
 #include "SVGNames.h"
-#include "platform/graphics/filters/FilterEffect.h"
+#include "core/dom/ElementTraversal.h"
 #include "core/svg/SVGFEFuncAElement.h"
 #include "core/svg/SVGFEFuncBElement.h"
 #include "core/svg/SVGFEFuncGElement.h"
 #include "core/svg/SVGFEFuncRElement.h"
 #include "core/svg/graphics/filters/SVGFilterBuilder.h"
+#include "platform/graphics/filters/FilterEffect.h"
 
 namespace WebCore {
 
 inline SVGFEComponentTransferElement::SVGFEComponentTransferElement(Document& document)
     : SVGFilterPrimitiveStandardAttributes(SVGNames::feComponentTransferTag, document)
     , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
 {
     ScriptWrappable::init(this);
     addToPropertyMap(m_in1);
 }
@@ skipping 33 matching lines @@
     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
 
     if (!input1)
         return nullptr;
 
     ComponentTransferFunction red;
     ComponentTransferFunction green;
     ComponentTransferFunction blue;
     ComponentTransferFunction alpha;
 
-    for (Node* node = firstChild(); node; node = node->nextSibling()) {
-        if (node->hasTagName(SVGNames::feFuncRTag))
-            red = toSVGFEFuncRElement(node)->transferFunction();
-        else if (node->hasTagName(SVGNames::feFuncGTag))
-            green = toSVGFEFuncGElement(node)->transferFunction();
-        else if (node->hasTagName(SVGNames::feFuncBTag))
-            blue = toSVGFEFuncBElement(node)->transferFunction();
-        else if (node->hasTagName(SVGNames::feFuncATag))
-            alpha = toSVGFEFuncAElement(node)->transferFunction();
+    for (SVGElement* element = Traversal<SVGElement>::firstChild(*this); element; element = Traversal<SVGElement>::nextSibling(*element)) {
+        if (isSVGFEFuncRElement(*element))
+            red = toSVGFEFuncRElement(*element).transferFunction();
+        else if (isSVGFEFuncGElement(*element))
+            green = toSVGFEFuncGElement(*element).transferFunction();
+        else if (isSVGFEFuncBElement(*element))
+            blue = toSVGFEFuncBElement(*element).transferFunction();
+        else if (isSVGFEFuncAElement(*element))
+            alpha = toSVGFEFuncAElement(*element).transferFunction();
     }
 
     RefPtr<FilterEffect> effect = FEComponentTransfer::create(filter, red, green, blue, alpha);
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 }