Rework SVGViewSpec<->SVGSVGElement integration

third_party/WebKit/Source/core/svg/SVGViewSpec.cpp

 /*
  * Copyright (C) 2007, 2010 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 "core/svg/SVGViewSpec.h"
 
 #include "core/svg/SVGParserUtilities.h"
 #include "core/svg/SVGPreserveAspectRatio.h"
 #include "core/svg/SVGRect.h"
+#include "core/svg/SVGSVGElement.h"
 #include "core/svg/SVGTransformList.h"
 #include "wtf/text/ParsingUtilities.h"
 
 namespace blink {
 
 SVGViewSpec::SVGViewSpec()
     : m_viewBox(SVGRect::createInvalid()),
       m_preserveAspectRatio(SVGPreserveAspectRatio::create()),
       m_transform(SVGTransformList::create()) {}
 
 DEFINE_TRACE(SVGViewSpec) {
   visitor->trace(m_viewBox);
   visitor->trace(m_preserveAspectRatio);
   visitor->trace(m_transform);
 }
 
+SVGViewSpec* SVGViewSpec::createForElement(SVGSVGElement& rootElement) {
+  SVGViewSpec* viewSpec = rootElement.viewSpec();
+  if (!viewSpec)
+    viewSpec = new SVGViewSpec();
+  else
+    viewSpec->reset();
+  viewSpec->inheritViewAttributesFromElement(rootElement);
+  return viewSpec;
+}
+
 bool SVGViewSpec::parseViewSpec(const String& spec) {
   if (spec.isEmpty())
     return false;
   if (spec.is8Bit()) {
     const LChar* ptr = spec.characters8();
     const LChar* end = ptr + spec.length();
     return parseViewSpecInternal(ptr, end);
   }
   const UChar* ptr = spec.characters16();
   const UChar* end = ptr + spec.length();
@@ skipping 109 matching lines @@
 
     if (!skipExactly<CharType>(ptr, end, ')'))
       return false;
 
     skipExactly<CharType>(ptr, end, ';');
   }
   return skipExactly<CharType>(ptr, end, ')');
 }
 
 }  // namespace blink