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// Copyright 2019 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.
#ifndef UI_VIEWS_ANIMATION_COMPOSITOR_ANIMATION_RUNNER_H_
#define UI_VIEWS_ANIMATION_COMPOSITOR_ANIMATION_RUNNER_H_
#include <memory>
#include "base/scoped_observer.h"
#include "base/time/time.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/compositor_animation_observer.h"
#include "ui/compositor/compositor_observer.h"
#include "ui/gfx/animation/animation_container.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/widget_observer.h"
namespace views {
class Widget;
// An animation runner based on ui::Compositor.
class VIEWS_EXPORT CompositorAnimationRunner
: public gfx::AnimationRunner,
public ui::CompositorAnimationObserver,
public WidgetObserver {
public:
explicit CompositorAnimationRunner(Widget* widget);
CompositorAnimationRunner(CompositorAnimationRunner&) = delete;
CompositorAnimationRunner& operator=(CompositorAnimationRunner&) = delete;
~CompositorAnimationRunner() override;
// gfx::AnimationRunner:
void Stop() override;
// ui::CompositorAnimationObserver:
void OnAnimationStep(base::TimeTicks timestamp) override;
void OnCompositingShuttingDown(ui::Compositor* compositor) override;
// WidgetObserver:
void OnWidgetDestroying(Widget* widget) override;
protected:
// gfx::AnimationRunner:
void OnStart(base::TimeDelta min_interval, base::TimeDelta elapsed) override;
private:
// Called when an animation is stopped, the compositor is shutting down, or
// the widget is destroyed.
void StopInternal();
// When |widget_| is nullptr, it means the widget has been destroyed and
// |compositor_| must also be nullptr.
Widget* widget_;
// When |compositor_| is nullptr, it means either the animation is not
// running, or the compositor or |widget_| associated with the compositor_ has
// been destroyed during animation.
ui::Compositor* compositor_ = nullptr;
base::TimeDelta min_interval_ = base::TimeDelta::Max();
base::TimeTicks last_tick_;
};
} // namespace views
#endif // UI_VIEWS_ANIMATION_COMPOSITOR_ANIMATION_RUNNER_H_
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