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 11namespace blink { 12 13class StyleResolverState; 14 15class StyleInterpolation : public Interpolation { 16public: 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 25 virtual bool isStyleInterpolation() const OVERRIDE FINAL { return true; } 26 27 CSSPropertyID id() const { return m_id; } 28 29 virtual void trace(Visitor* visitor) OVERRIDE 30 { 31 Interpolation::trace(visitor); 32 } 33 34protected: 35 CSSPropertyID m_id; 36 37 StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id) 38 : Interpolation(start, end) 39 , m_id(id) 40 { 41 } 42}; 43 44DEFINE_TYPE_CASTS(StyleInterpolation, Interpolation, value, value->isStyleInterpolation(), value.isStyleInterpolation()); 45 46} 47 48#endif 49