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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.
#include "ui/compositor/callback_layer_animation_observer.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "ui/compositor/layer_animation_sequence.h"
namespace ui {
void CallbackLayerAnimationObserver::DummyAnimationStartedCallback(
const CallbackLayerAnimationObserver&) {}
bool CallbackLayerAnimationObserver::DummyAnimationEndedCallback(
bool should_delete_observer,
const CallbackLayerAnimationObserver&) {
return should_delete_observer;
}
CallbackLayerAnimationObserver::CallbackLayerAnimationObserver(
AnimationStartedCallback animation_started_callback,
AnimationEndedCallback animation_ended_callback)
: animation_started_callback_(std::move(animation_started_callback)),
animation_ended_callback_(std::move(animation_ended_callback)) {}
CallbackLayerAnimationObserver::CallbackLayerAnimationObserver(
AnimationStartedCallback animation_started_callback,
bool should_delete_observer)
: animation_started_callback_(std::move(animation_started_callback)),
animation_ended_callback_(base::BindRepeating(
&CallbackLayerAnimationObserver::DummyAnimationEndedCallback,
should_delete_observer)) {}
CallbackLayerAnimationObserver::CallbackLayerAnimationObserver(
AnimationEndedCallback animation_ended_callback)
: animation_started_callback_(base::BindRepeating(
&CallbackLayerAnimationObserver::DummyAnimationStartedCallback)),
animation_ended_callback_(std::move(animation_ended_callback)) {}
CallbackLayerAnimationObserver::~CallbackLayerAnimationObserver() = default;
void CallbackLayerAnimationObserver::SetActive() {
active_ = true;
CheckAllSequencesStartedAndCompleted();
}
void CallbackLayerAnimationObserver::OnLayerAnimationStarted(
ui::LayerAnimationSequence* sequence) {
CHECK_LT(started_count_, attached_sequence_count_);
++started_count_;
CheckAllSequencesStarted();
}
void CallbackLayerAnimationObserver::OnLayerAnimationEnded(
ui::LayerAnimationSequence* sequence) {
CHECK_LT(GetNumSequencesCompleted(), attached_sequence_count_);
++successful_count_;
CheckAllSequencesCompleted();
}
void CallbackLayerAnimationObserver::OnLayerAnimationAborted(
ui::LayerAnimationSequence* sequence) {
CHECK_LT(GetNumSequencesCompleted(), attached_sequence_count_);
++aborted_count_;
CheckAllSequencesCompleted();
}
void CallbackLayerAnimationObserver::OnLayerAnimationScheduled(
ui::LayerAnimationSequence* sequence) {}
bool CallbackLayerAnimationObserver::RequiresNotificationWhenAnimatorDestroyed()
const {
return true;
}
void CallbackLayerAnimationObserver::OnAttachedToSequence(
ui::LayerAnimationSequence* sequence) {
++attached_sequence_count_;
}
void CallbackLayerAnimationObserver::OnDetachedFromSequence(
ui::LayerAnimationSequence* sequence) {
CHECK_LT(detached_sequence_count_, attached_sequence_count_);
++detached_sequence_count_;
CheckAllSequencesStartedAndCompleted();
}
int CallbackLayerAnimationObserver::GetNumSequencesCompleted() {
return aborted_count_ + successful_count_;
}
void CallbackLayerAnimationObserver::CheckAllSequencesStartedAndCompleted() {
base::WeakPtr<CallbackLayerAnimationObserver> weak_this =
weak_factory_.GetWeakPtr();
CheckAllSequencesStarted();
// The started callback may have deleted the observer.
if (!weak_this) {
return;
}
CheckAllSequencesCompleted();
}
void CallbackLayerAnimationObserver::CheckAllSequencesStarted() {
if (active_ && (attached_sequence_count_ == started_count_ ||
detached_sequence_count_ == attached_sequence_count_))
animation_started_callback_.Run(*this);
}
void CallbackLayerAnimationObserver::CheckAllSequencesCompleted() {
if (active_ && (GetNumSequencesCompleted() == attached_sequence_count_ ||
detached_sequence_count_ == attached_sequence_count_)) {
active_ = false;
base::WeakPtr<CallbackLayerAnimationObserver> weak_this =
weak_factory_.GetWeakPtr();
bool should_delete = animation_ended_callback_.Run(*this);
if (!weak_this) {
if (should_delete)
LOG(WARNING) << "CallbackLayerAnimationObserver was explicitly "
"destroyed AND was requested to be destroyed via the "
"AnimationEndedCallback's return value.";
return;
}
if (should_delete)
delete this;
}
}
} // namespace ui
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