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ash / wm / overview / delayed_animation_observer_impl.h [blame]

// Copyright 2018 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_WM_OVERVIEW_DELAYED_ANIMATION_OBSERVER_IMPL_H_
#define ASH_WM_OVERVIEW_DELAYED_ANIMATION_OBSERVER_IMPL_H_

#include "ash/ash_export.h"
#include "ash/wm/overview/delayed_animation_observer.h"
#include "base/memory/raw_ptr.h"
#include "ui/compositor/layer_animation_observer.h"

namespace ash {
class OverviewDelegate;

// An observer that does not watch any animation, but instead has a timeout
// before telling its owner to destroy it. It is used when entering overview
// without any animations but we still want to delay some tasks.
class ASH_EXPORT ForceDelayObserver : public DelayedAnimationObserver {
 public:
  explicit ForceDelayObserver(base::TimeDelta delay);

  ForceDelayObserver(const ForceDelayObserver&) = delete;
  ForceDelayObserver& operator=(const ForceDelayObserver&) = delete;

  ~ForceDelayObserver() override;

  // DelayedAnimationObserver:
  void SetOwner(OverviewDelegate* owner) override;
  void Shutdown() override;

 private:
  void Finish();

  raw_ptr<OverviewDelegate> owner_ = nullptr;
  base::WeakPtrFactory<ForceDelayObserver> weak_ptr_factory_{this};
};

// An observer which watches a overview enter animation and signals its owner
// when the animation it is watching finishes.
class ASH_EXPORT EnterAnimationObserver : public ui::ImplicitAnimationObserver,
                                          public DelayedAnimationObserver {
 public:
  EnterAnimationObserver();

  EnterAnimationObserver(const EnterAnimationObserver&) = delete;
  EnterAnimationObserver& operator=(const EnterAnimationObserver&) = delete;

  ~EnterAnimationObserver() override;

  // ui::ImplicitAnimationObserver:
  void OnImplicitAnimationsCompleted() override;

  // DelayedAnimationObserver:
  void SetOwner(OverviewDelegate* owner) override;
  void Shutdown() override;

 private:
  raw_ptr<OverviewDelegate> owner_ = nullptr;
};

// An observer which watches a overview exit animation and signals its owner
// when the animation it is watching finishes.
class ASH_EXPORT ExitAnimationObserver : public ui::ImplicitAnimationObserver,
                                         public DelayedAnimationObserver {
 public:
  ExitAnimationObserver();

  ExitAnimationObserver(const ExitAnimationObserver&) = delete;
  ExitAnimationObserver& operator=(const ExitAnimationObserver&) = delete;

  ~ExitAnimationObserver() override;

  // ui::ImplicitAnimationObserver:
  void OnImplicitAnimationsCompleted() override;

  // DelayedAnimationObserver:
  void SetOwner(OverviewDelegate* owner) override;
  void Shutdown() override;

 private:
  raw_ptr<OverviewDelegate> owner_ = nullptr;
};

}  // namespace ash

#endif  // ASH_WM_OVERVIEW_DELAYED_ANIMATION_OBSERVER_IMPL_H_