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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/heap/Handle.h"
#include "platform/scroll/ScrollAnimatorCompositorCoordinator.h"
#include "wtf/Allocator.h"
#include "wtf/Noncopyable.h"
#include <memory>
namespace blink {
class ScrollableArea;
class CompositorAnimationTimeline;
class CompositorScrollOffsetAnimationCurve;
// Animator for fixed-destination scrolls, such as those triggered by
// CSSOM View scroll APIs.
class ProgrammaticScrollAnimator : public ScrollAnimatorCompositorCoordinator {
WTF_MAKE_NONCOPYABLE(ProgrammaticScrollAnimator);
public:
static ProgrammaticScrollAnimator* create(ScrollableArea* scrollableArea) {
return new ProgrammaticScrollAnimator(scrollableArea);
}
virtual ~ProgrammaticScrollAnimator();
void scrollToOffsetWithoutAnimation(const ScrollOffset&);
void animateToOffset(const ScrollOffset&);
// ScrollAnimatorCompositorCoordinator implementation.
void resetAnimationState() override;
void cancelAnimation() override;
void takeOverCompositorAnimation() override{};
ScrollableArea* getScrollableArea() const override {
return m_scrollableArea;
}
void tickAnimation(double monotonicTime) override;
void updateCompositorAnimations() override;
void notifyCompositorAnimationFinished(int groupId) override;
void notifyCompositorAnimationAborted(int groupId) override{};
void layerForCompositedScrollingDidChange(
CompositorAnimationTimeline*) override;
DECLARE_TRACE();
private:
explicit ProgrammaticScrollAnimator(ScrollableArea*);
void notifyOffsetChanged(const ScrollOffset&);
Member<ScrollableArea> m_scrollableArea;
std::unique_ptr<CompositorScrollOffsetAnimationCurve> m_animationCurve;
ScrollOffset m_targetOffset;
double m_startTime;
};
} // namespace blink
#endif // ProgrammaticScrollAnimator_h
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