| // 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()) { |
| } |
| |
| 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 (std::set<scoped_refptr<LayerAnimator> >::iterator 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 |