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// 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.
#ifndef LegacyStyleInterpolation_h
#define LegacyStyleInterpolation_h
#include "core/CSSPropertyNames.h"
#include "core/CoreExport.h"
#include "core/animation/Interpolation.h"
#include "core/animation/PropertyHandle.h"
#include "core/css/resolver/AnimatedStyleBuilder.h"
#include <memory>
namespace blink {
class StyleResolverState;
class CORE_EXPORT LegacyStyleInterpolation : public Interpolation {
public:
static PassRefPtr<LegacyStyleInterpolation> create(
PassRefPtr<AnimatableValue> start,
PassRefPtr<AnimatableValue> end,
CSSPropertyID id) {
return adoptRef(new LegacyStyleInterpolation(
InterpolableAnimatableValue::create(std::move(start)),
InterpolableAnimatableValue::create(std::move(end)), id));
}
// 1) convert m_cachedValue into an X
// 2) shove X into StyleResolverState
// X can be:
// (1) a CSSValue (and applied via StyleBuilder::applyProperty)
// (2) an AnimatableValue (and applied via
// AnimatedStyleBuilder::applyProperty)
// (3) a custom value that is inserted directly into the StyleResolverState.
void apply(StyleResolverState& state) const {
AnimatedStyleBuilder::applyProperty(m_id, state, currentValue().get());
}
bool isLegacyStyleInterpolation() const final { return true; }
PassRefPtr<AnimatableValue> currentValue() const {
return toInterpolableAnimatableValue(m_cachedValue.get())->value();
}
CSSPropertyID id() const { return m_id; }
PropertyHandle getProperty() const final { return PropertyHandle(id()); }
void interpolate(int iteration, double fraction) final;
protected:
LegacyStyleInterpolation(std::unique_ptr<InterpolableValue> start,
std::unique_ptr<InterpolableValue> end,
CSSPropertyID);
private:
const std::unique_ptr<InterpolableValue> m_start;
const std::unique_ptr<InterpolableValue> m_end;
CSSPropertyID m_id;
mutable double m_cachedFraction;
mutable int m_cachedIteration;
mutable std::unique_ptr<InterpolableValue> m_cachedValue;
InterpolableValue* getCachedValueForTesting() const {
return m_cachedValue.get();
}
friend class AnimationInterpolableValueTest;
friend class AnimationInterpolationEffectTest;
};
DEFINE_TYPE_CASTS(LegacyStyleInterpolation,
Interpolation,
value,
value->isLegacyStyleInterpolation(),
value.isLegacyStyleInterpolation());
} // namespace blink
#endif
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