1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef StyleInterpolation_h 6 #define StyleInterpolation_h 7 8 #include "core/CSSPropertyNames.h" 9 #include "core/animation/Interpolation.h" 10 11 namespace blink { 12 13 class StyleResolverState; 14 15 class StyleInterpolation : public Interpolation { 16 public: 17 // 1) convert m_cachedValue into an X 18 // 2) shove X into StyleResolverState 19 // X can be: 20 // (1) a CSSValue (and applied via StyleBuilder::applyProperty) 21 // (2) an AnimatableValue (and applied via // AnimatedStyleBuilder::applyProperty) 22 // (3) a custom value that is inserted directly into the StyleResolverState. 23 virtual void apply(StyleResolverState&) const = 0; 24 isStyleInterpolation()25 virtual bool isStyleInterpolation() const OVERRIDE FINAL { return true; } 26 id()27 CSSPropertyID id() const { return m_id; } 28 trace(Visitor * visitor)29 virtual void trace(Visitor* visitor) OVERRIDE 30 { 31 Interpolation::trace(visitor); 32 } 33 34 protected: 35 CSSPropertyID m_id; 36 StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start,PassOwnPtrWillBeRawPtr<InterpolableValue> end,CSSPropertyID id)37 StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id) 38 : Interpolation(start, end) 39 , m_id(id) 40 { 41 } 42 }; 43 44 DEFINE_TYPE_CASTS(StyleInterpolation, Interpolation, value, value->isStyleInterpolation(), value.isStyleInterpolation()); 45 46 } 47 48 #endif 49