ash : Decouple power button controller and session state controller.

ash/wm/power_button_controller.h

Index: ash/wm/power_button_controller.h
diff --git a/ash/wm/power_button_controller.h b/ash/wm/power_button_controller.h
index db8ec4f492b785b241c8c27c2f95a778b514acd5..3c0127b8f0ec372b628bcffe4a8897dce868c33a 100644
--- a/ash/wm/power_button_controller.h
+++ b/ash/wm/power_button_controller.h
@@ -6,13 +6,8 @@
 #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;
@@ -25,109 +20,20 @@ class Layer;
 
 namespace ash {
 
-// Performs system-related functions on behalf of PowerButtonController.
-class ASH_EXPORT PowerButtonControllerDelegate {
- public:
-  PowerButtonControllerDelegate() {}
-  virtual ~PowerButtonControllerDelegate() {}
+namespace test {
+class PowerButtonControllerTest;
+}
 
-  virtual void RequestLockScreen() = 0;
-  virtual void RequestShutdown() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PowerButtonControllerDelegate);
-};
+class SessionStateController;
 
 // Displays onscreen animations and locks or suspends the system in response to
 // the power button being pressed or released.
-class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
-                                         public ShellObserver {
+class ASH_EXPORT PowerButtonController {
  public:
 
-  // 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();
+  explicit PowerButtonController(SessionStateController* controller);
   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;
   }
@@ -135,56 +41,12 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   // 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:
-  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_;
+  friend class test::PowerButtonControllerTest;
 
   // Are the power or lock buttons currently held?
   bool power_button_down_;
@@ -193,37 +55,11 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   // 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_;
 
-  // 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_;
+  SessionStateController* controller_; // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };