Revert 162140 - ash : Decouple power button controller and session state controller.

ash/wm/session_state_controller.h

-// Copyright (c) 2012 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_WM_SESSION_STATE_CONTROLLER_H_
-#define ASH_WM_SESSION_STATE_CONTROLLER_H_
-
-#include "ash/ash_export.h"
-#include "ash/shell_observer.h"
-#include "ash/wm/session_state_animator.h"
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time.h"
-#include "base/timer.h"
-#include "ui/aura/root_window_observer.h"
-
-namespace gfx {
-class Rect;
-class Size;
-}
-
-namespace ui {
-class Layer;
-}
-
-namespace ash {
-
-namespace test {
-class PowerButtonControllerTest;
-}
-
-// Performs system-related functions on behalf of SessionStateController.
-class ASH_EXPORT SessionStateControllerDelegate {
- public:
-  SessionStateControllerDelegate() {}
-  virtual ~SessionStateControllerDelegate() {}
-
-  virtual void RequestLockScreen() = 0;
-  virtual void RequestShutdown() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SessionStateControllerDelegate);
-};
-
-// Displays onscreen animations and locks or suspends the system in response to
-// the power button being pressed or released.
-class ASH_EXPORT SessionStateController : public aura::RootWindowObserver,
-                                          public ShellObserver {
- public:
-  // Amount of time that the power button needs to be held before we lock the
-  // screen.
-  static const int kLockTimeoutMs;
-
-  // Amount of time that the power button needs to be held before we shut down.
-  static const int kShutdownTimeoutMs;
-
-  // Amount of time to wait for our lock requests to be honored before giving
-  // up.
-  static const int kLockFailTimeoutMs;
-
-  // When the button has been held continuously from the unlocked state, amount
-  // of time that we wait after the screen locker window is shown before
-  // starting the pre-shutdown animation.
-  static const int kLockToShutdownTimeoutMs;
-
-  // Amount of time taken to scale the snapshot of the screen down to a
-  // slightly-smaller size once the user starts holding the power button.  Used
-  // for both the pre-lock and pre-shutdown animations.
-  static const int kSlowCloseAnimMs;
-
-  // Amount of time taken to scale the snapshot of the screen back to its
-  // original size when the button is released.
-  static const int kUndoSlowCloseAnimMs;
-
-  // Amount of time taken to scale the snapshot down to a point in the center of
-  // the screen once the screen has been locked or we've been notified that the
-  // system is shutting down.
-  static const int kFastCloseAnimMs;
-
-  // Additional time (beyond kFastCloseAnimMs) to wait after starting the
-  // fast-close shutdown animation before actually requesting shutdown, to give
-  // the animation time to finish.
-  static const int kShutdownRequestDelayMs;
-
-  // Helper class used by tests to access internal state.
-  class ASH_EXPORT TestApi {
-   public:
-    explicit TestApi(SessionStateController* controller);
-
-    virtual ~TestApi();
-
-    bool lock_timer_is_running() const {
-      return controller_->lock_timer_.IsRunning();
-    }
-    bool lock_fail_timer_is_running() const {
-      return controller_->lock_fail_timer_.IsRunning();
-    }
-    bool lock_to_shutdown_timer_is_running() const {
-      return controller_->lock_to_shutdown_timer_.IsRunning();
-    }
-    bool shutdown_timer_is_running() const {
-      return controller_->pre_shutdown_timer_.IsRunning();
-    }
-    bool real_shutdown_timer_is_running() const {
-      return controller_->real_shutdown_timer_.IsRunning();
-    }
-
-    void trigger_lock_timeout() {
-      controller_->OnLockTimeout();
-      controller_->lock_timer_.Stop();
-    }
-    void trigger_lock_fail_timeout() {
-      controller_->OnLockFailTimeout();
-      controller_->lock_fail_timer_.Stop();
-    }
-    void trigger_lock_to_shutdown_timeout() {
-      controller_->OnLockToShutdownTimeout();
-      controller_->lock_to_shutdown_timer_.Stop();
-    }
-    void trigger_shutdown_timeout() {
-      controller_->OnPreShutdownAnimationTimeout();
-      controller_->pre_shutdown_timer_.Stop();
-    }
-    void trigger_real_shutdown_timeout() {
-      controller_->OnRealShutdownTimeout();
-      controller_->real_shutdown_timer_.Stop();
-    }
-   private:
-    SessionStateController* controller_;  // not owned
-
-    DISALLOW_COPY_AND_ASSIGN(TestApi);
-  };
-
-  SessionStateController();
-  virtual ~SessionStateController();
-
-  // RootWindowObserver override:
-  virtual void OnRootWindowHostCloseRequested(
-     const aura::RootWindow* root) OVERRIDE;
-
-  // ShellObserver overrides:
-  virtual void OnLoginStateChanged(user::LoginStatus status) OVERRIDE;
-  virtual void OnAppTerminating() OVERRIDE;
-  virtual void OnLockStateChanged(bool locked) OVERRIDE;
-
-  void SetDelegate(SessionStateControllerDelegate* delegate);
-
-  // Returns true iff when we're in state when user session can be locked.
-  virtual bool IsEligibleForLock();
-
-  // Returns true if system is locked.
-  virtual bool IsLocked();
-
-  // Starts locking (with slow animation) that can be cancelled.
-  // After locking and |kLockToShutdownTimeoutMs| StartShutdownAnimation()
-  // will be called unless CancelShutdown() is called.
-  virtual void StartLockAnimation();
-
-  // Starts shutting down (with slow animation) that can be cancelled.
-  virtual void StartShutdownAnimation();
-
-  // Starts usual lock animation, but locks immediately.
-  // Unlike StartLockAnimation it does no lead to StartShutdownAnimation.
-  virtual void StartLockAnimationAndLockImmediately();
-
-  // Returns true if we have requested system to lock, but haven't received
-  // confirmation yet.
-  virtual bool LockRequested();
-
-  // Returns true if we are shutting down.
-  virtual bool ShutdownRequested();
-
-  // Returns true if we are within cancellable lock timeframe.
-  virtual bool CanCancelLockAnimation();
-
-  // Cancels locking and reverts lock animation.
-  virtual void CancelLockAnimation();
-
-  // Cancels locking and reverts lock animation with slightly different
-  // parameters. Seems to be some bug, but refactoring should keep all bugs.
-  // TODO(antrim): remove this, animations should actually be the same.
-  virtual void CancelLockWithOtherAnimation();
-
-  // Returns true if we are within cancellable shutdown timeframe.
-  virtual bool CanCancelShutdownAnimation();
-
-  // Cancels shutting down and reverts shutdown animation.
-  virtual void CancelShutdownAnimation();
-
-  // Called when Chrome gets a request to display the lock screen.
-  virtual void OnStartingLock();
-
-  // Displays the shutdown animation and requests shutdown when it's done.
-  virtual void RequestShutdown();
-
- protected:
-  friend class test::PowerButtonControllerTest;
-
-  bool IsLoggedInAsNonGuest() const;
-
- private:
-  void RequestShutdownImpl();
-
-  // Starts lock timer.
-  void StartLockTimer();
-
-  // Requests that the screen be locked and starts |lock_fail_timer_|.
-  void OnLockTimeout();
-
-  // Reverts the pre-lock animation, reports the error.
-  void OnLockFailTimeout();
-
-  // Starts timer for gap between lock and shutdown.
-  void StartLockToShutdownTimer();
-
-  // Calls StartShutdownAnimation().
-  void OnLockToShutdownTimeout();
-
-  // Starts timer for undoable shutdown animation.
-  void StartPreShutdownAnimationTimer();
-
-  // Calls RequestShutdownImpl();
-  void OnPreShutdownAnimationTimeout();
-
-  // Starts timer for final shutdown animation.
-  void StartRealShutdownTimer();
-
-  // Requests that the machine be shut down.
-  void OnRealShutdownTimeout();
-
-  // The current login status.
-  user::LoginStatus login_status_;
-
-  // Original login status from before we locked. LOGGED_IN_NONE if it's not
-  // locked.
-  user::LoginStatus unlocked_login_status_;
-
-  // Are we in the process of shutting the machine down?
-  bool shutting_down_;
-
-  // Indicates whether controller should proceed to (cancellable) shutdown after
-  // locking.
-  bool shutdown_after_lock_;
-
-  // Started when the user first presses the power button while in a
-  // logged-in-as-a-non-guest-user, unlocked state.  When it fires, we lock the
-  // screen.
-  base::OneShotTimer<SessionStateController> lock_timer_;
-
-  // Started when we request that the screen be locked.  When it fires, we
-  // assume that our request got dropped.
-  base::OneShotTimer<SessionStateController> lock_fail_timer_;
-
-  // Started when the screen is locked while the power button is held.  Adds a
-  // delay between the appearance of the lock screen and the beginning of the
-  // pre-shutdown animation.
-  base::OneShotTimer<SessionStateController> lock_to_shutdown_timer_;
-
-  // Started when we begin displaying the pre-shutdown animation.  When it
-  // fires, we start the shutdown animation and get ready to request shutdown.
-  base::OneShotTimer<SessionStateController> pre_shutdown_timer_;
-
-  // Started when we display the shutdown animation.  When it fires, we actually
-  // request shutdown.  Gives the animation time to complete before Chrome, X,
-  // etc. are shut down.
-  base::OneShotTimer<SessionStateController> real_shutdown_timer_;
-
-  scoped_ptr<internal::SessionStateAnimator> animator_;
-
-  scoped_ptr<SessionStateControllerDelegate> delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(SessionStateController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_SESSION_STATE_CONTROLLER_H_