Push animation value 'inherit' handling into SVGAnimateElement

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

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * 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.
@@ skipping 14 matching lines @@
 
 #include "core/CoreExport.h"
 #include "core/SVGNames.h"
 #include "core/svg/SVGAnimatedTypeAnimator.h"
 #include "core/svg/SVGAnimationElement.h"
 #include "platform/heap/Handle.h"
 #include <base/gtest_prod_util.h>
 
 namespace blink {
 
+// If we have 'inherit' as animation value, we need to grab the value
+// during the animation since the value can be animated itself.
+enum AnimatedPropertyValueType { RegularPropertyValue, InheritValue };
+
 class CORE_EXPORT SVGAnimateElement : public SVGAnimationElement {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static SVGAnimateElement* create(Document&);
   ~SVGAnimateElement() override;
 
   DECLARE_VIRTUAL_TRACE();
 
   bool isSVGAnimationAttributeSettingJavaScriptURL(
@@ skipping 26 matching lines @@
   void setAttributeName(const QualifiedName&) final;
 
   FRIEND_TEST_ALL_PREFIXES(UnsafeSVGAttributeSanitizationTest,
                            stringsShouldNotSupportAddition);
 
  private:
   void resetAnimatedPropertyType();
 
   bool hasValidAttributeType() override;
 
+  SVGPropertyBase* adjustForInheritance(SVGPropertyBase*,
+                                        AnimatedPropertyValueType) const;
+
   Member<SVGPropertyBase> m_fromProperty;
   Member<SVGPropertyBase> m_toProperty;
   Member<SVGPropertyBase> m_toAtEndOfDurationProperty;
   Member<SVGPropertyBase> m_animatedProperty;
 
   SVGAnimatedTypeAnimator m_animator;
+
+  AnimatedPropertyValueType m_fromPropertyValueType;
+  AnimatedPropertyValueType m_toPropertyValueType;
 };
 
 inline bool isSVGAnimateElement(const SVGElement& element) {
   return element.hasTagName(SVGNames::animateTag) ||
          element.hasTagName(SVGNames::animateTransformTag) ||
          element.hasTagName(SVGNames::setTag);
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGAnimateElement);
 
 }  // namespace blink
 
 #endif  // SVGAnimateElement_h