| // 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 "base/scoped_observer.h" |
| #include "base/time/time.h" |
| #include "ui/compositor/compositor_animation_observer.h" |
| #include "ui/compositor/compositor_observer.h" |
| #include "ui/gfx/animation/animation_container.h" |
| |
| namespace ui { |
| class Compositor; |
| } // namespace ui |
| |
| namespace views { |
| |
| // An animation runner based on ui::Compositor. |
| class CompositorAnimationRunner : public gfx::AnimationRunner, |
| public ui::CompositorAnimationObserver { |
| public: |
| explicit CompositorAnimationRunner(ui::Compositor* compositor); |
| ~CompositorAnimationRunner() override; |
| |
| // gfx::AnimationRunner: |
| void Stop() override; |
| |
| // ui::CompositorAnimationObserver: |
| void OnAnimationStep(base::TimeTicks timestamp) override; |
| void OnCompositingShuttingDown(ui::Compositor* compositor) override; |
| |
| protected: |
| // gfx::AnimationRunner: |
| void OnStart(base::TimeDelta min_interval) override; |
| |
| private: |
| // This observes Compositor's destruction and helps CompositorAnimationRunner |
| // to stop animation. we need this because CompositorAnimationRunner observes |
| // the Compositor only when it's animating. |
| class CompositorChecker : public ui::CompositorObserver { |
| public: |
| explicit CompositorChecker(CompositorAnimationRunner* runner); |
| CompositorChecker(const CompositorChecker& other) = delete; |
| CompositorChecker& operator=(const CompositorChecker& other) = delete; |
| ~CompositorChecker() override; |
| |
| // ui::CompositorObserver: |
| void OnCompositingShuttingDown(ui::Compositor* compositor) override; |
| |
| private: |
| CompositorAnimationRunner* runner_; |
| ScopedObserver<ui::Compositor, CompositorChecker> scoped_observer_{this}; |
| }; |
| |
| // When |compositor_| is nullptr, it means compositor has been shut down. |
| ui::Compositor* compositor_; |
| |
| base::TimeDelta min_interval_ = base::TimeDelta::Max(); |
| base::TimeTicks last_tick_; |
| |
| CompositorChecker checker_{this}; |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_ANIMATION_COMPOSITOR_ANIMATION_RUNNER_H_ |