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// Copyright (c) 2012 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_animation_sequence.h"
#include <algorithm>
#include <iterator>
#include "base/debug/trace_event.h"
#include "ui/compositor/layer_animation_delegate.h"
#include "ui/compositor/layer_animation_element.h"
#include "ui/compositor/layer_animation_observer.h"
namespace ui {
LayerAnimationSequence::LayerAnimationSequence()
: is_cyclic_(false),
last_element_(0) {
}
LayerAnimationSequence::LayerAnimationSequence(LayerAnimationElement* element)
: is_cyclic_(false),
last_element_(0) {
AddElement(element);
}
LayerAnimationSequence::~LayerAnimationSequence() {
FOR_EACH_OBSERVER(LayerAnimationObserver,
observers_,
DetachedFromSequence(this, true));
}
void LayerAnimationSequence::Progress(base::TimeDelta elapsed,
LayerAnimationDelegate* delegate) {
bool redraw_required = false;
if (elements_.empty())
return;
if (is_cyclic_ && duration_ > base::TimeDelta()) {
// If delta = elapsed - last_start_ is huge, we can skip ahead by complete
// loops to save time.
base::TimeDelta delta = elapsed - last_start_;
int64 k = delta.ToInternalValue() / duration_.ToInternalValue() - 1;
last_start_ += base::TimeDelta::FromInternalValue(
k * duration_.ToInternalValue());
}
size_t current_index = last_element_ % elements_.size();
while ((is_cyclic_ || last_element_ < elements_.size()) &&
(last_start_ + elements_[current_index]->duration() < elapsed)) {
// Let the element we're passing finish.
if (elements_[current_index]->Progress(1.0, delegate))
redraw_required = true;
last_start_ += elements_[current_index]->duration();
++last_element_;
current_index = last_element_ % elements_.size();
}
if (is_cyclic_ || last_element_ < elements_.size()) {
double t = 1.0;
if (elements_[current_index]->duration() > base::TimeDelta()) {
t = (elapsed - last_start_).InMillisecondsF() /
elements_[current_index]->duration().InMillisecondsF();
}
if (elements_[current_index]->Progress(t, delegate))
redraw_required = true;
}
// Since the delegate may be deleted due to the notifications below, it is
// important that we schedule a draw before sending them.
if (redraw_required)
delegate->ScheduleDrawForAnimation();
if (!is_cyclic_ && elapsed == duration_) {
last_element_ = 0;
last_start_ = base::TimeDelta::FromMilliseconds(0);
NotifyEnded();
}
}
void LayerAnimationSequence::GetTargetValue(
LayerAnimationElement::TargetValue* target) const {
if (is_cyclic_)
return;
for (size_t i = last_element_; i < elements_.size(); ++i)
elements_[i]->GetTargetValue(target);
}
void LayerAnimationSequence::Abort() {
size_t current_index = last_element_ % elements_.size();
while (current_index < elements_.size()) {
elements_[current_index]->Abort();
++current_index;
}
last_element_ = 0;
last_start_ = base::TimeDelta::FromMilliseconds(0);
NotifyAborted();
}
void LayerAnimationSequence::AddElement(LayerAnimationElement* element) {
// Update duration and properties.
duration_ += element->duration();
properties_.insert(element->properties().begin(),
element->properties().end());
elements_.push_back(make_linked_ptr(element));
}
bool LayerAnimationSequence::HasCommonProperty(
const LayerAnimationElement::AnimatableProperties& other) const {
LayerAnimationElement::AnimatableProperties intersection;
std::insert_iterator<LayerAnimationElement::AnimatableProperties> ii(
intersection, intersection.begin());
std::set_intersection(properties_.begin(), properties_.end(),
other.begin(), other.end(),
ii);
return intersection.size() > 0;
}
void LayerAnimationSequence::AddObserver(LayerAnimationObserver* observer) {
if (!observers_.HasObserver(observer)) {
observers_.AddObserver(observer);
observer->AttachedToSequence(this);
}
}
void LayerAnimationSequence::RemoveObserver(LayerAnimationObserver* observer) {
observers_.RemoveObserver(observer);
observer->DetachedFromSequence(this, true);
}
void LayerAnimationSequence::OnScheduled() {
NotifyScheduled();
}
void LayerAnimationSequence::OnAnimatorDestroyed() {
if (observers_.might_have_observers()) {
ObserverListBase<LayerAnimationObserver>::Iterator it(observers_);
LayerAnimationObserver* obs;
while ((obs = it.GetNext()) != NULL) {
if (!obs->RequiresNotificationWhenAnimatorDestroyed()) {
// Remove the observer, but do not allow notifications to be sent.
observers_.RemoveObserver(obs);
obs->DetachedFromSequence(this, false);
}
}
}
}
void LayerAnimationSequence::NotifyScheduled() {
FOR_EACH_OBSERVER(LayerAnimationObserver,
observers_,
OnLayerAnimationScheduled(this));
}
void LayerAnimationSequence::NotifyEnded() {
FOR_EACH_OBSERVER(LayerAnimationObserver,
observers_,
OnLayerAnimationEnded(this));
}
void LayerAnimationSequence::NotifyAborted() {
FOR_EACH_OBSERVER(LayerAnimationObserver,
observers_,
OnLayerAnimationAborted(this));
}
} // namespace ui
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