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// Copyright 2019 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/compositor_animation_runner.h"
#include "ui/views/widget/widget.h"
namespace views {
////////////////////////////////////////////////////////////////////////////////
// CompositorAnimationRunner
//
CompositorAnimationRunner::CompositorAnimationRunner(
Widget* widget,
const base::Location& location)
: ui::CompositorAnimationObserver(location), widget_(widget) {
widget_->AddObserver(this);
}
CompositorAnimationRunner::~CompositorAnimationRunner() {
// Make sure we're not observing |compositor_|.
if (widget_) {
OnWidgetDestroying(widget_);
}
DCHECK(!compositor_ || !compositor_->HasAnimationObserver(this));
CHECK(!IsInObserverList());
}
void CompositorAnimationRunner::Stop() {
StopInternal();
}
void CompositorAnimationRunner::OnAnimationStep(base::TimeTicks timestamp) {
if (timestamp - last_tick_ < min_interval_) {
return;
}
last_tick_ = timestamp;
Step(last_tick_);
}
void CompositorAnimationRunner::OnCompositingShuttingDown(
ui::Compositor* compositor) {
StopInternal();
}
void CompositorAnimationRunner::OnWidgetDestroying(Widget* widget) {
StopInternal();
widget_->RemoveObserver(this);
widget_ = nullptr;
}
void CompositorAnimationRunner::OnStart(base::TimeDelta min_interval,
base::TimeDelta elapsed) {
if (!widget_) {
return;
}
ui::Compositor* current_compositor = widget_->GetCompositor();
if (!current_compositor) {
StopInternal();
return;
}
if (current_compositor != compositor_) {
if (compositor_ && compositor_->HasAnimationObserver(this)) {
compositor_->RemoveAnimationObserver(this);
}
compositor_ = current_compositor;
}
last_tick_ = base::TimeTicks::Now() - elapsed;
min_interval_ = min_interval;
DCHECK(!compositor_->HasAnimationObserver(this));
compositor_->AddAnimationObserver(this);
}
void CompositorAnimationRunner::StopInternal() {
if (compositor_ && compositor_->HasAnimationObserver(this)) {
compositor_->RemoveAnimationObserver(this);
}
min_interval_ = base::TimeDelta::Max();
compositor_ = nullptr;
}
} // namespace views
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