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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.
- #include "ui/compositor/layer_animator_collection.h"
- #include <set>
- #include "base/time/time.h"
- #include "ui/compositor/compositor.h"
- #include "ui/compositor/layer_animator.h"
- namespace ui {
- LayerAnimatorCollection::LayerAnimatorCollection(Compositor* compositor)
- : compositor_(compositor), last_tick_time_(base::TimeTicks::Now()) {
- // Do not check the active duration for the LayerAnimationCollection because
- // new animation can be added while running existing animation, which
- // extends the duration.
- set_check_active_duration(false);
- }
- LayerAnimatorCollection::~LayerAnimatorCollection() {
- if (compositor_)
- compositor_->RemoveAnimationObserver(this);
- }
- void LayerAnimatorCollection::StartAnimator(
- scoped_refptr<LayerAnimator> animator) {
- DCHECK_EQ(0U, animators_.count(animator));
- if (animators_.empty())
- last_tick_time_ = base::TimeTicks::Now();
- animators_.insert(animator);
- if (animators_.size() == 1U && compositor_)
- compositor_->AddAnimationObserver(this);
- }
- void LayerAnimatorCollection::StopAnimator(
- scoped_refptr<LayerAnimator> animator) {
- DCHECK_GT(animators_.count(animator), 0U);
- animators_.erase(animator);
- if (animators_.empty() && compositor_)
- compositor_->RemoveAnimationObserver(this);
- }
- bool LayerAnimatorCollection::HasActiveAnimators() const {
- return !animators_.empty();
- }
- void LayerAnimatorCollection::OnAnimationStep(base::TimeTicks now) {
- last_tick_time_ = now;
- std::set<scoped_refptr<LayerAnimator> > list = animators_;
- for (auto iter = list.begin(); iter != list.end(); ++iter) {
- // Make sure the animator is still valid.
- if (animators_.count(*iter) > 0)
- (*iter)->Step(now);
- }
- if (!HasActiveAnimators() && compositor_)
- compositor_->RemoveAnimationObserver(this);
- }
- void LayerAnimatorCollection::OnCompositingShuttingDown(
- Compositor* compositor) {
- DCHECK_EQ(compositor_, compositor);
- compositor_->RemoveAnimationObserver(this);
- compositor_ = nullptr;
- }
- } // namespace ui
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