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

ash/wm/power_button_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_POWER_BUTTON_CONTROLLER_H_
 #define ASH_WM_POWER_BUTTON_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 PowerButtonController.
+class ASH_EXPORT PowerButtonControllerDelegate {
+ public:
+  PowerButtonControllerDelegate() {}
+  virtual ~PowerButtonControllerDelegate() {}
 
-class SessionStateController;
+  virtual void RequestLockScreen() = 0;
+  virtual void RequestShutdown() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PowerButtonControllerDelegate);
+};
 
 // Displays onscreen animations and locks or suspends the system in response to
 // the power button being pressed or released.
-class ASH_EXPORT PowerButtonController {
+class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
+                                         public ShellObserver {
  public:
 
-  explicit PowerButtonController(SessionStateController* controller);
+  // Helper class used by tests to access internal state.
+  class ASH_EXPORT TestApi {
+   public:
+    explicit TestApi(PowerButtonController* 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_->shutdown_timer_.IsRunning();
+    }
+    bool real_shutdown_timer_is_running() const {
+      return controller_->real_shutdown_timer_.IsRunning();
+    }
+    bool hide_black_layer_timer_is_running() const {
+      return animator_api_->hide_black_layer_timer_is_running();
+    }
+
+    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_->OnShutdownTimeout();
+      controller_->shutdown_timer_.Stop();
+    }
+    void trigger_real_shutdown_timeout() {
+      controller_->OnRealShutdownTimeout();
+      controller_->real_shutdown_timer_.Stop();
+    }
+    void TriggerHideBlackLayerTimeout() {
+      animator_api_->TriggerHideBlackLayerTimeout();
+    }
+
+    // Returns true if containers of a given |container_mask|
+    // were last animated with |type| (probably; the analysis is fairly ad-hoc).
+    // |container_mask| is a bitfield of a Container.
+    bool ContainersAreAnimated(int container_mask,
+        internal::SessionStateAnimator::AnimationType type) const {
+      return animator_api_->ContainersAreAnimated(container_mask, type);
+    }
+
+    // Returns true if |black_layer_| is non-NULL and visible.
+    bool BlackLayerIsVisible() {
+      return animator_api_->BlackLayerIsVisible();
+    }
+
+    // Returns |black_layer_|'s bounds, or an empty rect if the layer is
+    // NULL.
+    gfx::Rect GetBlackLayerBounds() const {
+      return animator_api_->GetBlackLayerBounds();
+    }
+
+   private:
+    PowerButtonController* controller_;  // not owned
+
+    scoped_ptr<internal::SessionStateAnimator::TestApi> animator_api_;
+
+    DISALLOW_COPY_AND_ASSIGN(TestApi);
+  };
+
+  PowerButtonController();
   virtual ~PowerButtonController();
 
+  void set_delegate(PowerButtonControllerDelegate* delegate) {
+    delegate_.reset(delegate);
+  }
+
   void set_has_legacy_power_button_for_test(bool legacy) {
     has_legacy_power_button_ = legacy;
   }
 
   // Called when the current screen brightness changes.
   void OnScreenBrightnessChanged(double percent);
 
+  // Called when Chrome gets a request to display the lock screen.
+  void OnStartingLock();
+
   // Called when the power or lock buttons are pressed or released.
   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
 
+  // Displays the shutdown animation and requests shutdown when it's done.
+  void RequestShutdown();
+
+  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;
+
  private:
-  friend class test::PowerButtonControllerTest;
+  bool LoggedInAsNonGuest() const;
+
+  // Requests that the screen be locked and starts |lock_fail_timer_|.
+  void OnLockTimeout();
+
+  // Aborts the pre-lock animation.
+  void OnLockFailTimeout();
+
+  // Displays the pre-shutdown animation and starts |shutdown_timer_|.
+  void OnLockToShutdownTimeout();
+
+  // Calls StartShutdownAnimationAndRequestShutdown().
+  void OnShutdownTimeout();
+
+  // Requests that the machine be shut down.
+  void OnRealShutdownTimeout();
+
+  // Puts us into the pre-lock or pre-shutdown state.
+  void StartLockTimer();
+  void StartShutdownTimer();
+
+  // Displays the shutdown animation and starts |real_shutdown_timer_|.
+  void StartShutdownAnimationAndRequestShutdown();
+
+  scoped_ptr<PowerButtonControllerDelegate> delegate_;
+
+  // The current login status.
+  user::LoginStatus login_status_;
+
+  // Original login status during locked.  LOGGED_IN_NONE if it's not locked.
+  user::LoginStatus unlocked_login_status_;
 
   // Are the power or lock buttons currently held?
   bool power_button_down_;
   bool lock_button_down_;
 
   // Is the screen currently turned off?
   bool screen_is_off_;
 
+  // Are we in the process of shutting the machine down?
+  bool shutting_down_;
+
   // Was a command-line switch set telling us that we're running on hardware
   // that misreports power button releases?
   bool has_legacy_power_button_;
 
-  SessionStateController* controller_; // Not owned.
+  // 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<PowerButtonController> lock_timer_;
+
+  // Started when we request that the screen be locked.  When it fires, we
+  // assume that our request got dropped.
+  base::OneShotTimer<PowerButtonController> 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<PowerButtonController> 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<PowerButtonController> 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<PowerButtonController> real_shutdown_timer_;
+
+  scoped_ptr<internal::SessionStateAnimator> animator_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_