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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 Interpolation_h
#define Interpolation_h
#include "CSSPropertyNames.h"
#include "core/animation/InterpolableValue.h"
#include "heap/Handle.h"
#include "wtf/RefCounted.h"
namespace WebCore {
class StyleResolverState;
class Interpolation : public RefCountedWillBeGarbageCollected<Interpolation> {
DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(Interpolation);
public:
static PassRefPtrWillBeRawPtr<Interpolation> create(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
{
return adoptRefWillBeNoop(new Interpolation(start, end));
}
void interpolate(int iteration, double fraction) const;
virtual bool isStyleInterpolation() const { return false; }
virtual bool isLegacyStyleInterpolation() const { return false; }
virtual void trace(Visitor*);
protected:
const OwnPtrWillBeMember<InterpolableValue> m_start;
const OwnPtrWillBeMember<InterpolableValue> m_end;
mutable double m_cachedFraction;
mutable int m_cachedIteration;
mutable OwnPtrWillBeMember<InterpolableValue> m_cachedValue;
Interpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end);
private:
InterpolableValue* getCachedValueForTesting() const { return m_cachedValue.get(); }
friend class AnimationInterpolableValueTest;
friend class AnimationInterpolationEffectTest;
};
class StyleInterpolation : public Interpolation {
public:
// 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.
virtual void apply(StyleResolverState&) const = 0;
virtual bool isStyleInterpolation() const OVERRIDE FINAL { return true; }
CSSPropertyID id() const { return m_id; }
virtual void trace(Visitor*) OVERRIDE;
protected:
CSSPropertyID m_id;
StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
: Interpolation(start, end)
, m_id(id)
{
}
};
class LegacyStyleInterpolation : public StyleInterpolation {
public:
static PassRefPtrWillBeRawPtr<LegacyStyleInterpolation> create(PassRefPtrWillBeRawPtr<AnimatableValue> start, PassRefPtrWillBeRawPtr<AnimatableValue> end, CSSPropertyID id)
{
return adoptRefWillBeNoop(new LegacyStyleInterpolation(InterpolableAnimatableValue::create(start), InterpolableAnimatableValue::create(end), id));
}
virtual void apply(StyleResolverState&) const OVERRIDE;
virtual bool isLegacyStyleInterpolation() const OVERRIDE FINAL { return true; }
PassRefPtrWillBeRawPtr<AnimatableValue> currentValue() const
{
InterpolableAnimatableValue* value = static_cast<InterpolableAnimatableValue*>(m_cachedValue.get());
return value->value();
}
virtual void trace(Visitor*) OVERRIDE;
private:
LegacyStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
: StyleInterpolation(start, end, id)
{
}
};
class LengthStyleInterpolation : public StyleInterpolation {
public:
static PassRefPtrWillBeRawPtr<LengthStyleInterpolation> create(CSSValue* start, CSSValue* end, CSSPropertyID id)
{
return adoptRefWillBeNoop(new LengthStyleInterpolation(lengthToInterpolableValue(start), lengthToInterpolableValue(end), id));
}
virtual void apply(StyleResolverState&) const OVERRIDE;
virtual void trace(Visitor*) OVERRIDE;
private:
LengthStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
: StyleInterpolation(start, end, id)
{ }
static PassOwnPtrWillBeRawPtr<InterpolableValue> lengthToInterpolableValue(CSSValue*);
static PassRefPtrWillBeRawPtr<CSSValue> interpolableValueToLength(InterpolableValue*);
friend class AnimationInterpolationTest;
};
DEFINE_TYPE_CASTS(StyleInterpolation, Interpolation, value, value->isStyleInterpolation(), value.isStyleInterpolation());
DEFINE_TYPE_CASTS(LegacyStyleInterpolation, Interpolation, value, value->isLegacyStyleInterpolation(), value.isLegacyStyleInterpolation());
}
#endif
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