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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/animation/animation_abort_handle.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animator.h"
namespace views {
AnimationAbortHandle::AnimationAbortHandle(AnimationBuilder::Observer* observer)
: observer_(observer) {
observer_->SetAbortHandle(this);
}
AnimationAbortHandle::~AnimationAbortHandle() {
DCHECK_NE(animation_state_, AnimationState::kNotStarted)
<< "You can't destroy the handle before the animation starts.";
if (observer_) {
observer_->SetAbortHandle(nullptr);
}
if (animation_state_ != AnimationState::kEnded) {
for (ui::Layer* layer : tracked_layers_) {
if (deleted_layers_.find(layer) != deleted_layers_.end()) {
continue;
}
layer->GetAnimator()->AbortAllAnimations();
}
}
// Remove the abort handle itself from the alive tracked layers.
for (ui::Layer* layer : tracked_layers_) {
if (deleted_layers_.find(layer) != deleted_layers_.end()) {
continue;
}
layer->RemoveObserver(this);
}
}
void AnimationAbortHandle::OnObserverDeleted() {
observer_ = nullptr;
}
void AnimationAbortHandle::AddLayer(ui::Layer* layer) {
// Do not allow to add the layer that was deleted before.
DCHECK(deleted_layers_.find(layer) == deleted_layers_.end());
bool inserted = tracked_layers_.insert(layer).second;
// In case that one layer is added to the abort handle multiple times.
if (inserted) {
layer->AddObserver(this);
}
}
void AnimationAbortHandle::OnAnimationStarted() {
DCHECK_EQ(animation_state_, AnimationState::kNotStarted);
animation_state_ = AnimationState::kRunning;
}
void AnimationAbortHandle::OnAnimationEnded() {
DCHECK_EQ(animation_state_, AnimationState::kRunning);
animation_state_ = AnimationState::kEnded;
}
void AnimationAbortHandle::LayerDestroyed(ui::Layer* layer) {
layer->RemoveObserver(this);
// NOTE: layer deletion may be caused by animation abortion. In addition,
// aborting an animation may lead to multiple layer deletions (for example, a
// animation abort callback could delete multiple views' layers). Therefore
// the destroyed layer should not be removed from `tracked_layers_` directly.
// Otherwise, iterating `tracked_layers_` in the animation abort handle's
// destructor is risky.
bool inserted = deleted_layers_.insert(layer).second;
DCHECK(inserted);
}
} // namespace views
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