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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 Keyframe_h
#define Keyframe_h
#include "core/CoreExport.h"
#include "core/animation/AnimationEffectReadOnly.h"
#include "core/animation/EffectModel.h"
#include "core/animation/PropertyHandle.h"
#include "core/animation/animatable/AnimatableValue.h"
#include "wtf/Allocator.h"
#include "wtf/Forward.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
namespace blink {
using PropertyHandleSet = HashSet<PropertyHandle>;
class Element;
class ComputedStyle;
// Represents a user specificed keyframe in a KeyframeEffect.
// http://w3c.github.io/web-animations/#keyframe
// FIXME: Make Keyframe immutable
class CORE_EXPORT Keyframe : public RefCounted<Keyframe> {
USING_FAST_MALLOC(Keyframe);
WTF_MAKE_NONCOPYABLE(Keyframe);
public:
virtual ~Keyframe() {}
void setOffset(double offset) { m_offset = offset; }
double offset() const { return m_offset; }
void setComposite(EffectModel::CompositeOperation composite) {
m_composite = composite;
}
EffectModel::CompositeOperation composite() const { return m_composite; }
void setEasing(PassRefPtr<TimingFunction> easing) { m_easing = easing; }
TimingFunction& easing() const { return *m_easing; }
static bool compareOffsets(const RefPtr<Keyframe>& a,
const RefPtr<Keyframe>& b) {
return a->offset() < b->offset();
}
virtual PropertyHandleSet properties() const = 0;
virtual PassRefPtr<Keyframe> clone() const = 0;
PassRefPtr<Keyframe> cloneWithOffset(double offset) const {
RefPtr<Keyframe> theClone = clone();
theClone->setOffset(offset);
return theClone.release();
}
virtual bool isAnimatableValueKeyframe() const { return false; }
virtual bool isStringKeyframe() const { return false; }
// Represents a property-value pair in a keyframe.
class PropertySpecificKeyframe : public RefCounted<PropertySpecificKeyframe> {
USING_FAST_MALLOC(PropertySpecificKeyframe);
WTF_MAKE_NONCOPYABLE(PropertySpecificKeyframe);
public:
virtual ~PropertySpecificKeyframe() {}
double offset() const { return m_offset; }
TimingFunction& easing() const { return *m_easing; }
EffectModel::CompositeOperation composite() const { return m_composite; }
double underlyingFraction() const {
return m_composite == EffectModel::CompositeReplace ? 0 : 1;
}
virtual bool isNeutral() const = 0;
virtual PassRefPtr<PropertySpecificKeyframe> cloneWithOffset(
double offset) const = 0;
// FIXME: Remove this once CompositorAnimations no longer depends on
// AnimatableValues
virtual bool populateAnimatableValue(
CSSPropertyID,
Element&,
const ComputedStyle& baseStyle,
const ComputedStyle* parentStyle) const {
return false;
}
virtual PassRefPtr<AnimatableValue> getAnimatableValue() const = 0;
virtual bool isAnimatableValuePropertySpecificKeyframe() const {
return false;
}
virtual bool isCSSPropertySpecificKeyframe() const { return false; }
virtual bool isSVGPropertySpecificKeyframe() const { return false; }
virtual PassRefPtr<PropertySpecificKeyframe> neutralKeyframe(
double offset,
PassRefPtr<TimingFunction> easing) const = 0;
virtual PassRefPtr<Interpolation> createInterpolation(
PropertyHandle,
const Keyframe::PropertySpecificKeyframe& end) const;
protected:
PropertySpecificKeyframe(double offset,
PassRefPtr<TimingFunction> easing,
EffectModel::CompositeOperation);
double m_offset;
RefPtr<TimingFunction> m_easing;
EffectModel::CompositeOperation m_composite;
};
virtual PassRefPtr<PropertySpecificKeyframe> createPropertySpecificKeyframe(
PropertyHandle) const = 0;
protected:
Keyframe()
: m_offset(nullValue()),
m_composite(EffectModel::CompositeReplace),
m_easing(LinearTimingFunction::shared()) {}
Keyframe(double offset,
EffectModel::CompositeOperation composite,
PassRefPtr<TimingFunction> easing)
: m_offset(offset), m_composite(composite), m_easing(easing) {}
double m_offset;
EffectModel::CompositeOperation m_composite;
RefPtr<TimingFunction> m_easing;
};
using PropertySpecificKeyframe = Keyframe::PropertySpecificKeyframe;
} // namespace blink
#endif // Keyframe_h
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