Web Animations - responsive interpolation

Source/core/animation/StringKeyframe.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/StringKeyframe.h"
 
 #include "core/animation/css/CSSAnimations.h"
 #include "core/animation/interpolation/DefaultStyleInterpolation.h"
+#include "core/animation/interpolation/DeferredLegacyStyleInterpolation.h"
 #include "core/animation/interpolation/LegacyStyleInterpolation.h"
 #include "core/animation/interpolation/LengthStyleInterpolation.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/rendering/style/RenderStyle.h"
 
 namespace WebCore {
 
 StringKeyframe::StringKeyframe(const StringKeyframe& copyFrom)
     : Keyframe(copyFrom.m_offset, copyFrom.m_composite, copyFrom.m_easing)
     , m_propertySet(copyFrom.m_propertySet->mutableCopy())
@@ skipping 86 matching lines @@
     case CSSPropertyTop:
     case CSSPropertyVerticalAlign:
     case CSSPropertyWordSpacing:
         if (LengthStyleInterpolation::canCreateFrom(*fromCSSValue) && LengthStyleInterpolation::canCreateFrom(*toCSSValue))
             return LengthStyleInterpolation::create(fromCSSValue, toCSSValue, property, range);
         break;
     default:
         break;
     }
 
+    if (DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(*fromCSSValue) || DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(*toCSSValue))
+        return DeferredLegacyStyleInterpolation::create(fromCSSValue, toCSSValue, property);
+
     // FIXME: Remove the use of AnimatableValues, RenderStyles and Elements here.
     // FIXME: Remove this cache
     if (!m_animatableValueCache)
-        m_animatableValueCache = StyleResolver::createAnimatableValueSnapshot(*element, property, fromCSSValue);
+        m_animatableValueCache = StyleResolver::createAnimatableValueSnapshot(*element, property, *fromCSSValue);
 
-    RefPtrWillBeRawPtr<AnimatableValue> to = StyleResolver::createAnimatableValueSnapshot(*element, property, toCSSValue);
+    RefPtrWillBeRawPtr<AnimatableValue> to = StyleResolver::createAnimatableValueSnapshot(*element, property, *toCSSValue);
     toStringPropertySpecificKeyframe(end)->m_animatableValueCache = to;
 
     return LegacyStyleInterpolation::create(m_animatableValueCache.get(), to.release(), property);
 }
 
 PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> StringKeyframe::PropertySpecificKeyframe::neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const
 {
     return adoptPtrWillBeNoop(new PropertySpecificKeyframe(offset, easing, 0, AnimationEffect::CompositeAdd));
 }
 
 PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> StringKeyframe::PropertySpecificKeyframe::cloneWithOffset(double offset) const
 {
     Keyframe::PropertySpecificKeyframe* theClone = new PropertySpecificKeyframe(offset, m_easing, m_value.get());
     toStringPropertySpecificKeyframe(theClone)->m_animatableValueCache = m_animatableValueCache;
     return adoptPtrWillBeNoop(theClone);
 }
 
 void StringKeyframe::PropertySpecificKeyframe::trace(Visitor* visitor)
 {
     visitor->trace(m_value);
     visitor->trace(m_animatableValueCache);
     Keyframe::PropertySpecificKeyframe::trace(visitor);
 }
 
 }