mash: Migrate wallpaper controllers to ash/common.

ash/wallpaper/wallpaper_widget_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_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_
-#define ASH_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/wm_window_observer.h"
-#include "base/macros.h"
-#include "ui/views/widget/widget_observer.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ash {
-class RootWindowController;
-
-// This class implements a widget-based wallpaper.
-// WallpaperWidgetController is owned by RootWindowController.
-// When the animation completes the old WallpaperWidgetController is
-// destroyed. Exported for tests.
-class ASH_EXPORT WallpaperWidgetController : public views::WidgetObserver,
-                                             public WmWindowObserver {
- public:
-  explicit WallpaperWidgetController(views::Widget* widget);
-  ~WallpaperWidgetController() override;
-
-  // Overridden from views::WidgetObserver.
-  void OnWidgetDestroying(views::Widget* widget) override;
-
-  // Set bounds for the widget that draws the wallpaper.
-  void SetBounds(const gfx::Rect& bounds);
-
-  // Move the wallpaper for |root_window| to the specified |container|.
-  // The lock screen moves the wallpaper container to hides the user's windows.
-  // Returns true if there was something to reparent.
-  bool Reparent(aura::Window* root_window, int container);
-
-  // Starts wallpaper fade in animation. |root_window_controller| is
-  // the root window where the animation will happen. (This is
-  // necessary this as |layer_| doesn't have access to the root window).
-  void StartAnimating(RootWindowController* root_window_controller);
-
-  views::Widget* widget() { return widget_; }
-
- private:
-  void RemoveObservers();
-
-  // WmWindowObserver:
-  void OnWindowBoundsChanged(WmWindow* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override;
-
-  views::Widget* widget_;
-
-  // Parent of |widget_|.
-  WmWindow* widget_parent_;
-
-  DISALLOW_COPY_AND_ASSIGN(WallpaperWidgetController);
-};
-
-// This class wraps a WallpaperWidgetController pointer. It is owned
-// by RootWindowController. The instance of WallpaperWidgetController is
-// moved to this RootWindowController when the animation completes.
-// Exported for tests.
-class ASH_EXPORT AnimatingWallpaperWidgetController {
- public:
-  explicit AnimatingWallpaperWidgetController(
-      WallpaperWidgetController* component);
-  ~AnimatingWallpaperWidgetController();
-
-  // Stops animation and makes sure OnImplicitAnimationsCompleted() is called if
-  // current animation is not finished yet.
-  // Note we have to make sure this function is called before we set
-  // AnimatingWallpaperWidgetController to a new controller. If it is not
-  // called, the animating widget/layer is closed immediately and the new one is
-  // animating from the widget/layer before animation. For instance, if a user
-  // quickly switches between red, green and blue wallpapers. The green
-  // wallpaper will first fade in from red wallpaper. And in the middle of the
-  // animation, blue wallpaper also wants to fade in. If the green wallpaper
-  // animation does not finish immediately, the green wallpaper widget will be
-  // removed and the red widget will show again. As a result, the blue wallpaper
-  // fades in from red wallpaper. This is a bad user experience. See bug
-  // http://crbug.com/156542 for more details.
-  void StopAnimating();
-
-  // Gets the wrapped WallpaperWidgetController pointer. Caller should
-  // take ownership of the pointer if |pass_ownership| is true.
-  WallpaperWidgetController* GetController(bool pass_ownership);
-
- private:
-  std::unique_ptr<WallpaperWidgetController> controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(AnimatingWallpaperWidgetController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_