123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293 |
- // Copyright 2021 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 ASH_UTILITY_LAYER_COPY_ANIMATOR_H_
- #define ASH_UTILITY_LAYER_COPY_ANIMATOR_H_
- #include <memory>
- #include "ash/ash_export.h"
- #include "base/callback.h"
- #include "base/memory/weak_ptr.h"
- #include "base/scoped_observation.h"
- #include "ui/aura/window.h"
- #include "ui/aura/window_observer.h"
- #include "ui/compositor/layer.h"
- #include "ui/compositor/layer_animation_observer.h"
- namespace ash {
- // A utility class that first creates a copy of the layer tree, then runs
- // animation. This is more performant if you want to apply animation to a
- // window/layer tree, as it only apply animation to one layer.
- class ASH_EXPORT LayerCopyAnimator : public aura::WindowObserver,
- public ui::LayerAnimationObserver {
- public:
- // Returns an associated LayerCopyAnimator, if any.
- static LayerCopyAnimator* Get(aura::Window* window);
- using AnimationCallback =
- base::OnceCallback<void(ui::Layer*, ui::LayerAnimationObserver*)>;
- // Creates a LayerCopyAnimator for 'window'. The instance created for this
- // window can later be obtained by 'LayerCopyAnimator::Get()'. Creating an
- // instance will start copying the layer, but animation won't start until
- // 'Start' is called. This will also destroy the current LayerCopyAnimator if
- // any.
- explicit LayerCopyAnimator(aura::Window* window);
- LayerCopyAnimator(const LayerCopyAnimator& animator) = delete;
- LayerCopyAnimator& operator=(const LayerCopyAnimator& animator) = delete;
- ~LayerCopyAnimator() override;
- // Request to start an animation. It'll start animation of the layer's copy is
- // is already available, or wait until the copy is made.
- void MaybeStartAnimation(ui::LayerAnimationObserver* observer,
- AnimationCallback callback);
- // Called when a layer is copied. This is public to deal with the shutdown
- // scenario. This is virtual for testing purpose.
- virtual void OnLayerCopied(std::unique_ptr<ui::Layer> new_layer);
- // ui::LayerAnimationObserver:
- void OnLayerAnimationEnded(ui::LayerAnimationSequence* sequence) override;
- void OnLayerAnimationAborted(ui::LayerAnimationSequence* sequence) override;
- void OnLayerAnimationScheduled(ui::LayerAnimationSequence* seq) override {}
- // aura::WindowObserver:
- void OnWindowBoundsChanged(aura::Window* window,
- const gfx::Rect& old_bounds,
- const gfx::Rect& new_bounds,
- ui::PropertyChangeReason reason) override;
- bool animation_requested() const { return animation_requested_; }
- ui::Layer* copied_layer_for_test() { return copied_layer_.get(); }
- private:
- void RunAnimation();
- void FinishAndDelete(bool abort);
- void EnsureFakeSequence();
- void NotifyWithFakeSequence(bool abort);
- aura::Window* window_;
- ui::LayerAnimationObserver* observer_ = nullptr;
- AnimationCallback animation_callback_;
- std::unique_ptr<ui::Layer> copied_layer_;
- // A dummy sequence to keep AnimationSequence alive during copy.
- std::unique_ptr<ui::LayerAnimationSequence> fake_sequence_;
- ui::Layer full_layer_{ui::LAYER_SOLID_COLOR};
- bool fail_ = false;
- bool animation_requested_ = false;
- ui::LayerAnimationSequence* last_sequence_ = nullptr;
- base::ScopedObservation<aura::Window, aura::WindowObserver> observation_{
- this};
- base::WeakPtrFactory<LayerCopyAnimator> weak_ptr_factory_{this};
- };
- } // namespace ash
- #endif // ASH_UTILITY_LAYER_COPY_ANIMATOR_H_
|