ash: Extract animator from PowerButtonController

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 eee5f1cd9ee832ca9cd4509402e9f008eeddec70..9b85aa890aaeac6fa15c8408ad2d2af01ce635d4 100644
--- a/ash/wm/power_button_controller.h
+++ b/ash/wm/power_button_controller.h
@@ -7,6 +7,7 @@
 
 #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"
@@ -42,31 +43,16 @@ class ASH_EXPORT PowerButtonControllerDelegate {
 class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
                                          public ShellObserver {
  public:
-  // Animations that can be applied to groups of containers.
-  // Exposed here for TestApi::ContainerGroupIsAnimated().
-  enum AnimationType {
-    ANIMATION_SLOW_CLOSE = 0,
-    ANIMATION_UNDO_SLOW_CLOSE,
-    ANIMATION_FAST_CLOSE,
-    ANIMATION_FADE_IN,
-    ANIMATION_HIDE,
-    ANIMATION_RESTORE,
-  };
-
-  // Groups of containers that can be animated.
-  // Exposed here for TestApi::ContainerGroupIsAnimated().
-  enum ContainerGroup {
-    ALL_CONTAINERS = 0,
-    SCREEN_LOCKER_CONTAINERS,
-    SCREEN_LOCKER_AND_RELATED_CONTAINERS,
-    ALL_BUT_SCREEN_LOCKER_AND_RELATED_CONTAINERS,
-  };
-
   // Helper class used by tests to access internal state.
   class ASH_EXPORT TestApi {
    public:
     explicit TestApi(PowerButtonController* controller)
-        : controller_(controller) {}
+        : controller_(controller),
+          animator_api_(new SessionStateAnimator::TestApi(
+                            controller->animator_)) {}
+    virtual ~TestApi() {
+      delete animator_api_;
+    }
 
     bool lock_timer_is_running() const {
       return controller_->lock_timer_.IsRunning();
@@ -84,7 +70,7 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
       return controller_->real_shutdown_timer_.IsRunning();
     }
     bool hide_background_layer_timer_is_running() const {
-      return controller_->hide_background_layer_timer_.IsRunning();
+      return animator_api_->hide_background_layer_timer_is_running();
     }
 
     void trigger_lock_timeout() {
@@ -108,24 +94,30 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
       controller_->real_shutdown_timer_.Stop();
     }
     void trigger_hide_background_layer_timeout() {
-      controller_->HideBackgroundLayer();
-      controller_->hide_background_layer_timer_.Stop();
+      animator_api_->trigger_hide_background_layer_timeout();
     }
 
     // Returns true if the given set of containers was last animated with
     // |type| (probably; the analysis is fairly ad-hoc).
-    bool ContainerGroupIsAnimated(ContainerGroup group,
-                                  AnimationType type) const;
+    bool ContainerGroupIsAnimated(AnimationContainerGroup group,
+                                  SessionStateAnimationType type) const {
+      return animator_api_->ContainerGroupIsAnimated(group, type);
+    }
 
     // Returns true if |background_layer_| is non-NULL and visible.
-    bool BackgroundLayerIsVisible() const;
+    bool BackgroundLayerIsVisible() const {
+      return animator_api_->BackgroundLayerIsVisible();
+    }
 
     // Returns |background_layer_|'s bounds, or an empty rect if the layer is
     // NULL.
-    gfx::Rect GetBackgroundLayerBounds() const;
+    gfx::Rect GetBackgroundLayerBounds() const {
+      return animator_api_->GetBackgroundLayerBounds();
+    }
 
    private:
     PowerButtonController* controller_;  // not owned
+    SessionStateAnimator::TestApi* animator_api_;  // owned
 
     DISALLOW_COPY_AND_ASSIGN(TestApi);
   };
@@ -155,8 +147,6 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   void RequestShutdown();
 
   // aura::RootWindowObserver overrides:
-  virtual void OnRootWindowResized(const aura::RootWindow* root,
-                                   const gfx::Size& old_size) OVERRIDE;
   virtual void OnRootWindowHostCloseRequested(
                                    const aura::RootWindow* root) OVERRIDE;
 
@@ -190,11 +180,6 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   // Displays the shutdown animation and starts |real_shutdown_timer_|.
   void StartShutdownAnimationAndRequestShutdown();
 
-  // Shows or hides |background_layer_|.  The show method creates and
-  // initializes the layer if it doesn't already exist.
-  void ShowBackgroundLayer();
-  void HideBackgroundLayer();
-
   scoped_ptr<PowerButtonControllerDelegate> delegate_;
 
   // The current login status.
@@ -221,13 +206,6 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   // that misreports power button releases?
   bool has_legacy_power_button_;
 
-  // Layer that's stacked under all of the root window's children to provide a
-  // black background when we're scaling all of the other windows down.
-  // TODO(derat): Remove this in favor of having the compositor only clear the
-  // viewport when there are regions not covered by a layer:
-  // http://crbug.com/113445
-  scoped_ptr<ui::Layer> background_layer_;
-
   // 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.
@@ -251,10 +229,7 @@ class ASH_EXPORT PowerButtonController : public aura::RootWindowObserver,
   // etc. are shut down.
   base::OneShotTimer<PowerButtonController> real_shutdown_timer_;
 
-  // Started when we abort the pre-lock state.  When it fires, we hide
-  // |background_layer_|, as the desktop background is now covering the whole
-  // screen.
-  base::OneShotTimer<PowerButtonController> hide_background_layer_timer_;
+  SessionStateAnimator* animator_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };