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// Copyright 2023 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_SYSTEM_TOAST_SYSTEM_NUDGE_PAUSE_MANAGER_IMPL_H_
#define ASH_SYSTEM_TOAST_SYSTEM_NUDGE_PAUSE_MANAGER_IMPL_H_
#include <memory>
#include "ash/public/cpp/ash_public_export.h"
#include "ash/public/cpp/system/system_nudge_pause_manager.h"
#include "base/observer_list.h"
namespace ash {
class ScopedNudgePause;
// Class managing `SystemNudgeController` as `Observer`'s. This is needed to
// keep track of `SystemNudgeController`s and respond to `ScopedNudgePause`
// activities.
class ASH_PUBLIC_EXPORT SystemNudgePauseManagerImpl
: public SystemNudgePauseManager {
public:
class Observer : public base::CheckedObserver {
public:
~Observer() override = default;
// Called when a `SystemNudgePause` is created and starts to pause all the
// system nudges.
virtual void OnSystemNudgePaused() = 0;
};
SystemNudgePauseManagerImpl();
SystemNudgePauseManagerImpl(const SystemNudgePauseManagerImpl&) = delete;
SystemNudgePauseManagerImpl& operator=(const SystemNudgePauseManagerImpl&) =
delete;
~SystemNudgePauseManagerImpl() override;
int pause_counter() const { return pause_counter_; }
// SystemNudgePauseManager:
std::unique_ptr<ScopedNudgePause> CreateScopedPause() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
friend class ScopedNudgePause;
// SystemNudgePauseManager:
void Pause() override;
void Resume() override;
// Keeps track of the number of `ScopedNudgePause`s.
int pause_counter_ = 0;
base::ObserverList<Observer> observers_;
};
} // namespace ash
#endif // ASH_SYSTEM_TOAST_SYSTEM_NUDGE_PAUSE_MANAGER_IMPL_H_
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