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// Copyright 2016 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 CompositorScrollOffsetAnimationCurve_h
#define CompositorScrollOffsetAnimationCurve_h
#include "platform/PlatformExport.h"
#include "platform/animation/CompositorAnimationCurve.h"
#include "platform/geometry/FloatPoint.h"
#include "wtf/Noncopyable.h"
#include "wtf/PtrUtil.h"
#include <memory>
namespace cc {
class ScrollOffsetAnimationCurve;
}
namespace blink {
class PLATFORM_EXPORT CompositorScrollOffsetAnimationCurve
: public CompositorAnimationCurve {
WTF_MAKE_NONCOPYABLE(CompositorScrollOffsetAnimationCurve);
public:
enum ScrollDurationBehavior {
ScrollDurationDeltaBased = 0,
ScrollDurationConstant,
ScrollDurationInverseDelta
};
static std::unique_ptr<CompositorScrollOffsetAnimationCurve> create(
FloatPoint targetValue,
CompositorScrollOffsetAnimationCurve::ScrollDurationBehavior
durationBehavior) {
return WTF::wrapUnique(new CompositorScrollOffsetAnimationCurve(
targetValue, durationBehavior));
}
static std::unique_ptr<CompositorScrollOffsetAnimationCurve> create(
cc::ScrollOffsetAnimationCurve* curve) {
return WTF::wrapUnique(new CompositorScrollOffsetAnimationCurve(curve));
}
~CompositorScrollOffsetAnimationCurve() override;
void setInitialValue(FloatPoint);
FloatPoint getValue(double time) const;
double duration() const;
FloatPoint targetValue() const;
void applyAdjustment(IntSize);
void updateTarget(double time, FloatPoint newTarget);
// CompositorAnimationCurve implementation.
std::unique_ptr<cc::AnimationCurve> cloneToAnimationCurve() const override;
private:
CompositorScrollOffsetAnimationCurve(FloatPoint, ScrollDurationBehavior);
CompositorScrollOffsetAnimationCurve(cc::ScrollOffsetAnimationCurve*);
std::unique_ptr<cc::ScrollOffsetAnimationCurve> m_curve;
};
} // namespace blink
#endif // CompositorScrollOffsetAnimationCurve_h
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