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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_ANIMATION_ANIMATION_TIMELINE_H_
#define CC_ANIMATION_ANIMATION_TIMELINE_H_
#include <memory>
#include <unordered_map>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "cc/animation/animation_export.h"
#include "cc/base/protected_sequence_synchronizer.h"
#include "cc/paint/element_id.h"
namespace base {
class TimeTicks;
}
namespace cc {
class Animation;
class AnimationHost;
class ScrollTree;
// An AnimationTimeline owns a group of Animations.
//
// Each AnimationTimeline and its Animations have copies on the impl thread. We
// synchronize the main and impl thread instances using their IDs.
class CC_ANIMATION_EXPORT AnimationTimeline
: public base::RefCounted<AnimationTimeline>,
public ProtectedSequenceSynchronizer {
public:
static scoped_refptr<AnimationTimeline> Create(int id,
bool impl_only = false);
virtual scoped_refptr<AnimationTimeline> CreateImplInstance() const;
AnimationTimeline(const AnimationTimeline&) = delete;
AnimationTimeline& operator=(const AnimationTimeline&) = delete;
int id() const { return id_; }
using IdToAnimationMap = std::unordered_map<int, scoped_refptr<Animation>>;
const IdToAnimationMap& animations() const {
return id_to_animation_map_.Read(*this);
}
// Parent AnimationHost.
AnimationHost* animation_host() {
DCHECK(IsOwnerThread() || InProtectedSequence());
return animation_host_;
}
const AnimationHost* animation_host() const {
DCHECK(IsOwnerThread() || InProtectedSequence());
return animation_host_;
}
void SetAnimationHost(AnimationHost* animation_host);
bool is_impl_only() const { return is_impl_only_; }
void AttachAnimation(scoped_refptr<Animation> animation);
void DetachAnimation(scoped_refptr<Animation> animation);
void ClearAnimations();
bool HasAnimation() const {
return !id_to_animation_map_.Read(*this).empty();
}
bool TickTimeLinkedAnimations(
const std::vector<scoped_refptr<Animation>>& ticking_animations,
base::TimeTicks monotonic_time,
bool tick_finished);
virtual bool TickScrollLinkedAnimations(
const std::vector<scoped_refptr<Animation>>& ticking_animations,
const ScrollTree& scroll_tree,
bool is_active_tree);
virtual void PushPropertiesTo(AnimationTimeline* timeline_impl);
virtual void ActivateTimeline() {}
Animation* GetAnimationById(int animation_id) const;
void SetNeedsPushProperties();
bool needs_push_properties() const {
return needs_push_properties_.Read(*this);
}
virtual bool IsScrollTimeline() const;
virtual bool IsLinkedToScroller(ElementId scroller) const;
// ProtectedSequenceSynchronizer implementation
bool IsOwnerThread() const override;
bool InProtectedSequence() const override;
void WaitForProtectedSequenceCompletion() const override;
protected:
AnimationTimeline(int id, bool impl_only);
~AnimationTimeline() override;
// A list of all animations which this timeline owns.
ProtectedSequenceWritable<IdToAnimationMap> id_to_animation_map_;
private:
friend class base::RefCounted<AnimationTimeline>;
void PushAttachedAnimationsToImplThread(AnimationTimeline* timeline) const;
void RemoveDetachedAnimationsFromImplThread(
AnimationTimeline* timeline) const;
void PushPropertiesToImplThread(AnimationTimeline* timeline);
void EraseAnimation(scoped_refptr<Animation> animation);
const int id_;
raw_ptr<AnimationHost> animation_host_;
ProtectedSequenceWritable<bool> needs_push_properties_;
// Impl-only AnimationTimeline has no main thread instance and lives on
// it's own.
const bool is_impl_only_;
};
} // namespace cc
#endif // CC_ANIMATION_ANIMATION_TIMELINE_H_
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