Make power button controller restore to original transformation on the layer.

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_
 #pragma once
 
+#include <map>
+
 #include "ash/ash_export.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"
+#include "ui/aura/window.h"
 
 namespace gfx {
 class Size;
 }
 
 namespace ui {
 class Layer;
+class Transform;
 }
 
 namespace ash {
 
 // Performs system-related functions on behalf of PowerButtonController.
 class ASH_EXPORT PowerButtonControllerDelegate {
  public:
   PowerButtonControllerDelegate() {}
   virtual ~PowerButtonControllerDelegate() {}
 
@@ skipping 113 matching lines @@
   // 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);
 
   // aura::RootWindowObserver overrides:
   virtual void OnRootWindowResized(const gfx::Size& new_size) OVERRIDE;
 
+  // Fills |containers| with the containers described by |group|.
+  void GetContainers(ContainerGroup group,
+                     aura::Window::Windows* containers);
+
  private:
   // 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();
 
   // Displays the shutdown animation and starts |real_shutdown_timer_|.
   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();
 
   // Shows or hides |background_layer_|.  The show method creates and
   // initializes the layer if it doesn't already exist.
   void ShowBackgroundLayer();
   void HideBackgroundLayer();
 
+  // Apply animation |type| to all containers described by |group|.
+  void StartAnimation(ContainerGroup group, AnimationType type);
+
+  // Retrieve original transform for |window| stored before animation started.
+  ui::Transform RetrieveOriginalTransform(aura::Window* window);
+
   scoped_ptr<PowerButtonControllerDelegate> delegate_;
 
   // True if a non-guest user is currently logged in.
   bool logged_in_as_non_guest_;
 
   // True if the screen is currently locked.
   bool locked_;
 
   // Are the power or lock buttons currently held?
   bool power_button_down_;
@@ skipping 38 matching lines @@
   // 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_;
 
   // 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_;
 
+  // Map from containers to their original layer transforms before animation.
+  typedef std::map<aura::Window*, ui::Transform> WindowTransformsMap;
+  WindowTransformsMap container_transforms_;
+
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_