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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.
#ifndef ASH_ACCESSIBILITY_UI_ACCESSIBILITY_ANIMATION_ONE_SHOT_H_
#define ASH_ACCESSIBILITY_UI_ACCESSIBILITY_ANIMATION_ONE_SHOT_H_
#include "base/functional/callback.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
#include "ui/compositor/compositor_animation_observer.h"
#include "ui/gfx/geometry/rect.h"
namespace ui {
class Compositor;
} // namespace ui
namespace ash {
// Adapts the observer-like interface in |CompositorAnimationObserver| for
// simpler, safe usage.
//
// The |Compositor| expects all |CompositorAnimationObserver|s to be added while
// animating, but removed soon after. This class ensures this occurs by
// requiring the user pass a callback rather than dealing with the observer.
class AccessibilityAnimationOneShot : public ui::CompositorAnimationObserver {
public:
// |callback| below returns true if animation has finished; false to
// continue animating.
AccessibilityAnimationOneShot(
const gfx::Rect& bounds_in_dip,
base::RepeatingCallback<bool(base::TimeTicks)> callback);
~AccessibilityAnimationOneShot() override;
AccessibilityAnimationOneShot(const AccessibilityAnimationOneShot&) = delete;
AccessibilityAnimationOneShot& operator=(
const AccessibilityAnimationOneShot&) = delete;
private:
// CompositorAnimationObserver:
void OnAnimationStep(base::TimeTicks timestamp) override;
void OnCompositingShuttingDown(ui::Compositor* compositor) override;
base::RepeatingCallback<bool(base::TimeTicks)> callback_;
base::ScopedObservation<ui::Compositor, ui::CompositorAnimationObserver>
animation_observation_{this};
};
} // namespace ash
#endif // ASH_ACCESSIBILITY_UI_ACCESSIBILITY_ANIMATION_ONE_SHOT_H_
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