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// Copyright 2016 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_TOAST_MANAGER_IMPL_H_
#define ASH_SYSTEM_TOAST_TOAST_MANAGER_IMPL_H_
#include <memory>
#include <string>
#include "ash/ash_export.h"
#include "ash/public/cpp/session/session_observer.h"
#include "ash/public/cpp/system/toast_data.h"
#include "ash/public/cpp/system/toast_manager.h"
#include "ash/shell.h"
#include "ash/shell_observer.h"
#include "ash/system/toast/toast_overlay.h"
#include "base/containers/circular_deque.h"
#include "base/memory/weak_ptr.h"
namespace aura {
class Window;
}
namespace ash {
class ScopedToastPause;
// Class managing toast requests.
class ASH_EXPORT ToastManagerImpl : public ToastManager,
public ToastOverlay::Delegate,
public SessionObserver,
public ShellObserver {
public:
ToastManagerImpl();
ToastManagerImpl(const ToastManagerImpl&) = delete;
ToastManagerImpl& operator=(const ToastManagerImpl&) = delete;
~ToastManagerImpl() override;
// ToastManager:
void Show(ToastData data) override;
void Cancel(std::string_view id) override;
bool RequestFocusOnActiveToastButton(std::string_view id) override;
bool IsToastShown(std::string_view id) const override;
bool IsToastButtonFocused(std::string_view id) const override;
std::unique_ptr<ScopedToastPause> CreateScopedPause() override;
// ToastOverlay::Delegate:
void CloseToast() override;
void OnToastHoverStateChanged(bool is_hovering) override;
// SessionObserver:
void OnSessionStateChanged(session_manager::SessionState state) override;
ToastOverlay* GetCurrentOverlayForTesting(
aura::Window* root_window = Shell::GetRootWindowForNewWindows());
private:
class PausableTimer;
friend class ToastManagerImplTest;
// Uses `CloseAllToastsWithoutAnimation()`.
friend class BatterySaverControllerTest;
void ShowLatest();
// Creates a new toast overlay to be displayed on the designated
// `root_window`.
void CreateToastOverlayForRoot(aura::Window* root_window);
// Unshows all existing toast instances in `root_window_to_overlay_`.
void CloseAllToastsWithAnimation();
// Resets all existing toast instances in `root_window_to_overlay_`,
// effectively closing them without animation.
void CloseAllToastsWithoutAnimation();
// Checks whether any values in `root_window_to_overlay_` are not empty.
bool HasActiveToasts() const;
int serial_for_testing() const { return serial_; }
void ResetSerialForTesting() { serial_ = 0; }
// ShellObserver:
void OnRootWindowAdded(aura::Window* root_window) override;
void OnRootWindowWillShutdown(aura::Window* root_window) override;
// ToastManager:
void Pause() override;
void Resume() override;
// Used to destroy the currently running toast if its duration is not
// infinite. Also allows us to persist the toast on hover by pausing this
// timer when a toast instance is being hovered by the mouse.
std::unique_ptr<PausableTimer> current_toast_expiration_timer_;
int serial_ = 0;
bool locked_;
base::circular_deque<ToastData> queue_;
// Tracks active toast overlays and their corresponding root windows.
base::flat_map<aura::Window*, std::unique_ptr<ToastOverlay>>
root_window_to_overlay_;
// Keeps track of the number of `ScopedToastPause`.
int pause_counter_ = 0;
// Data of the toast which is currently shown. Empty if no toast is visible.
// Destroying a `ToastData` can reentrantly access other fields, so ensure it
// is destroyed before other data fields to prevent use-after-dtor issues when
// destroying `this`.
std::optional<ToastData> current_toast_data_;
ScopedSessionObserver scoped_session_observer_{this};
base::WeakPtrFactory<ToastManagerImpl> weak_ptr_factory_{this};
};
} // namespace ash
#endif // ASH_SYSTEM_TOAST_TOAST_MANAGER_IMPL_H_
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