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// Copyright (c) 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 CC_ANIMATION_SCROLL_OFFSET_ANIMATIONS_IMPL_H_
#define CC_ANIMATION_SCROLL_OFFSET_ANIMATIONS_IMPL_H_
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/memory/ref_counted.h"
#include "cc/animation/animation_delegate.h"
#include "cc/animation/scroll_offset_animation_curve.h"
#include "cc/trees/mutator_host_client.h"
#include "ui/gfx/geometry/scroll_offset.h"
namespace cc {
class AnimationPlayer;
class AnimationHost;
class AnimationTimeline;
class ElementAnimations;
// Contains an AnimationTimeline and its AnimationPlayer that owns the impl
// only scroll offset animations running on a particular CC Layer.
// We have just one player for impl-only scroll offset animations. I.e. only
// one element can have an impl-only scroll offset animation at any given time.
// Note that this class only exists on the compositor thread.
class CC_EXPORT ScrollOffsetAnimationsImpl : public AnimationDelegate {
public:
explicit ScrollOffsetAnimationsImpl(AnimationHost* animation_host);
~ScrollOffsetAnimationsImpl() override;
void ScrollAnimationCreate(ElementId element_id,
const gfx::ScrollOffset& target_offset,
const gfx::ScrollOffset& current_offset,
base::TimeDelta delayed_by);
bool ScrollAnimationUpdateTarget(ElementId element_id,
const gfx::Vector2dF& scroll_delta,
const gfx::ScrollOffset& max_scroll_offset,
base::TimeTicks frame_monotonic_time,
base::TimeDelta delayed_by);
// Aborts the currently running scroll offset animation on an element and
// starts a new one offsetted by adjustment.
void ScrollAnimationApplyAdjustment(ElementId element_id,
const gfx::Vector2dF& adjustment);
void ScrollAnimationAbort(bool needs_completion);
// AnimationDelegate implementation.
void NotifyAnimationStarted(base::TimeTicks monotonic_time,
TargetProperty::Type target_property,
int group) override {}
void NotifyAnimationFinished(base::TimeTicks monotonic_time,
TargetProperty::Type target_property,
int group) override;
void NotifyAnimationAborted(base::TimeTicks monotonic_time,
TargetProperty::Type target_property,
int group) override {}
void NotifyAnimationTakeover(base::TimeTicks monotonic_time,
TargetProperty::Type target_property,
double animation_start_time,
std::unique_ptr<AnimationCurve> curve) override {
}
private:
void ReattachScrollOffsetPlayerIfNeeded(ElementId element_id);
AnimationHost* animation_host_;
scoped_refptr<AnimationTimeline> scroll_offset_timeline_;
// We have just one player for impl-only scroll offset animations.
// I.e. only one element can have an impl-only scroll offset animation at
// any given time.
scoped_refptr<AnimationPlayer> scroll_offset_animation_player_;
DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationsImpl);
};
} // namespace cc
#endif // CC_ANIMATION_SCROLL_OFFSET_ANIMATIONS_IMPL_H_