Move common gradient attribute collection to SVGGradientElement

third_party/WebKit/Source/core/svg/SVGGradientElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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,
@@ skipping 14 matching lines @@
 #include "core/svg/SVGAnimatedEnumeration.h"
 #include "core/svg/SVGAnimatedTransformList.h"
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGURIReference.h"
 #include "core/svg/SVGUnitTypes.h"
 #include "platform/graphics/Gradient.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+struct GradientAttributes;
+
 enum SVGSpreadMethodType {
   SVGSpreadMethodUnknown = 0,
   SVGSpreadMethodPad,
   SVGSpreadMethodReflect,
   SVGSpreadMethodRepeat
 };
 template <>
 const SVGEnumerationStringEntries&
 getStaticStringEntries<SVGSpreadMethodType>();
 
 class SVGGradientElement : public SVGElement, public SVGURIReference {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(SVGGradientElement);
 
  public:
-  Vector<Gradient::ColorStop> buildStops();
-
-  SVGAnimatedTransformList* gradientTransform() {
+  SVGAnimatedTransformList* gradientTransform() const {
     return m_gradientTransform.get();
   }
-  SVGAnimatedEnumeration<SVGSpreadMethodType>* spreadMethod() {
+  SVGAnimatedEnumeration<SVGSpreadMethodType>* spreadMethod() const {
     return m_spreadMethod.get();
   }
-  SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>* gradientUnits() {
+  SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>* gradientUnits() const {
     return m_gradientUnits.get();
   }
 
+  const SVGGradientElement* referencedElement() const;
+  void collectCommonAttributes(GradientAttributes&) const;
+
   DECLARE_VIRTUAL_TRACE();
 
  protected:
   SVGGradientElement(const QualifiedName&, Document&);
 
+  using VisitedSet = HeapHashSet<Member<const SVGGradientElement>>;
+
   void svgAttributeChanged(const QualifiedName&) override;
 
  private:
   bool needsPendingResourceHandling() const final { return false; }
 
   void collectStyleForPresentationAttribute(const QualifiedName&,
                                             const AtomicString&,
                                             MutableStylePropertySet*) override;
 
   void childrenChanged(const ChildrenChange&) final;
 
+  Vector<Gradient::ColorStop> buildStops() const;
+
   Member<SVGAnimatedTransformList> m_gradientTransform;
   Member<SVGAnimatedEnumeration<SVGSpreadMethodType>> m_spreadMethod;
   Member<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_gradientUnits;
 };
 
 inline bool isSVGGradientElement(const SVGElement& element) {
   return element.hasTagName(SVGNames::radialGradientTag) ||
          element.hasTagName(SVGNames::linearGradientTag);
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGradientElement);
 
 }  // namespace blink
 
 #endif  // SVGGradientElement_h