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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 ProgrammaticScrollAnimator_h
#define ProgrammaticScrollAnimator_h
#include "platform/geometry/FloatPoint.h"
#include "wtf/FastAllocBase.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
namespace blink {
class ScrollableArea;
class WebScrollOffsetAnimationCurve;
// Animator for fixed-destination scrolls, such as those triggered by
// CSSOM View scroll APIs.
class ProgrammaticScrollAnimator {
WTF_MAKE_NONCOPYABLE(ProgrammaticScrollAnimator);
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<ProgrammaticScrollAnimator> create(ScrollableArea*);
~ProgrammaticScrollAnimator();
void animateToOffset(FloatPoint);
void cancelAnimation();
void tickAnimation(double monotonicTime);
bool hasRunningAnimation() const;
private:
explicit ProgrammaticScrollAnimator(ScrollableArea*);
void resetAnimationState();
ScrollableArea* m_scrollableArea;
OwnPtr<WebScrollOffsetAnimationCurve> m_animationCurve;
FloatPoint m_targetOffset;
double m_startTime;
};
} // namespace blink
#endif // ProgrammaticScrollAnimator_h
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