ash : introduce second SessionStateController implementation.

ash/wm/session_state_controller_impl.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_
+#ifndef ASH_WM_SESSION_STATE_CONTROLLER_IMPL_H_
+#define ASH_WM_SESSION_STATE_CONTROLLER_IMPL_H_
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "ash/wm/session_state_animator.h"
+#include "ash/wm/session_state_controller.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 {
+class ASH_EXPORT SessionStateControllerImpl : public SessionStateController {
  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);
+    explicit TestApi(SessionStateControllerImpl* 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 {
@@ skipping 20 matching lines @@
     }
     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
+    SessionStateControllerImpl* controller_;  // not owned
 
     DISALLOW_COPY_AND_ASSIGN(TestApi);
   };
 
-  SessionStateController();
-  virtual ~SessionStateController();
+  SessionStateControllerImpl();
+  virtual ~SessionStateControllerImpl();
 
   // 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();
+  virtual bool IsEligibleForLock() OVERRIDE;
 
   // Returns true if system is locked.
-  virtual bool IsLocked();
+  virtual bool IsLocked() OVERRIDE;
 
   // Starts locking (with slow animation) that can be cancelled.
   // After locking and |kLockToShutdownTimeoutMs| StartShutdownAnimation()
-  // will be called unless CancelShutdown() is called, if |shutdown_after_lock|
-  // is true.
-  virtual void StartLockAnimation(bool shutdown_after_lock);
+  // will be called unless CancelShutdownAnimation() is called, if
+  // shutdown_after_lock is true.
+  virtual void StartLockAnimation(bool shutdown_after_lock) OVERRIDE;
 
   // Starts shutting down (with slow animation) that can be cancelled.
-  virtual void StartShutdownAnimation();
+  virtual void StartShutdownAnimation() OVERRIDE;
 
   // Starts usual lock animation, but locks immediately.
   // Unlike StartLockAnimation it does no lead to StartShutdownAnimation.
-  virtual void StartLockAnimationAndLockImmediately();
+  virtual void StartLockAnimationAndLockImmediately() OVERRIDE;
 
   // Returns true if we have requested system to lock, but haven't received
   // confirmation yet.
-  virtual bool LockRequested();
+  virtual bool LockRequested() OVERRIDE;
 
   // Returns true if we are shutting down.
-  virtual bool ShutdownRequested();
+  virtual bool ShutdownRequested() OVERRIDE;
 
   // Returns true if we are within cancellable lock timeframe.
-  virtual bool CanCancelLockAnimation();
+  virtual bool CanCancelLockAnimation() OVERRIDE;
 
   // 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();
+  virtual void CancelLockAnimation() OVERRIDE;
 
   // Returns true if we are within cancellable shutdown timeframe.
-  virtual bool CanCancelShutdownAnimation();
+  virtual bool CanCancelShutdownAnimation() OVERRIDE;
 
   // Cancels shutting down and reverts shutdown animation.
-  virtual void CancelShutdownAnimation();
+  virtual void CancelShutdownAnimation() OVERRIDE;
 
   // Called when Chrome gets a request to display the lock screen.
-  virtual void OnStartingLock();
+  virtual void OnStartingLock() OVERRIDE;
 
   // Displays the shutdown animation and requests shutdown when it's done.
-  virtual void RequestShutdown();
+  virtual void RequestShutdown() OVERRIDE;
 
  protected:
   friend class test::PowerButtonControllerTest;
 
   bool IsLoggedInAsNonGuest() const;
 
  private:
   void RequestShutdownImpl();
 
   // Starts lock timer.
@@ skipping 16 matching lines @@
 
   // 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.
+  // The current login status, or original login status from before we locked..
   user::LoginStatus login_status_;
 
-  // Original login status from before we locked. LOGGED_IN_NONE if it's not
-  // locked.
-  user::LoginStatus unlocked_login_status_;
+  // Current lock status.
+  bool system_is_locked_;
 
   // 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_;
+  base::OneShotTimer<SessionStateControllerImpl> 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_;
+  base::OneShotTimer<SessionStateControllerImpl> 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_;
+  base::OneShotTimer<SessionStateControllerImpl> 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_;
+  base::OneShotTimer<SessionStateControllerImpl> 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_;
+  base::OneShotTimer<SessionStateControllerImpl> real_shutdown_timer_;
 
-  scoped_ptr<internal::SessionStateAnimator> animator_;
-
-  scoped_ptr<SessionStateControllerDelegate> delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(SessionStateController);
+  DISALLOW_COPY_AND_ASSIGN(SessionStateControllerImpl);
 };
 
 }  // namespace ash
 
-#endif  // ASH_WM_SESSION_STATE_CONTROLLER_H_
+#endif  // ASH_WM_SESSION_STATE_CONTROLLER_IMPL_H_