Rework ash::CursorManager into a corewm object, to share code with desktop.

ash/wm/cursor_manager.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_CURSOR_MANAGER_H_
-#define ASH_WM_CURSOR_MANAGER_H_
-
-#include "ash/ash_export.h"
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/client/cursor_client.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/point.h"
-
-namespace ash {
-
-namespace internal {
-class CursorState;
-}
-
-namespace test {
-class CursorManagerTestApi;
-}
-
-class ImageCursors;
-
-// This class controls the visibility and the type of the cursor.
-// The cursor type can be locked so that the type stays the same
-// until it's unlocked.
-class ASH_EXPORT CursorManager : public aura::client::CursorClient {
- public:
-  CursorManager();
-  virtual ~CursorManager();
-
-  bool is_cursor_locked() const { return cursor_lock_count_ > 0; }
-
-  // Overridden from aura::client::CursorClient:
-  virtual void SetCursor(gfx::NativeCursor) OVERRIDE;
-  virtual void ShowCursor() OVERRIDE;
-  virtual void HideCursor() OVERRIDE;
-  virtual bool IsCursorVisible() const OVERRIDE;
-  virtual void EnableMouseEvents() OVERRIDE;
-  virtual void DisableMouseEvents() OVERRIDE;
-  virtual bool IsMouseEventsEnabled() const OVERRIDE;
-  virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
-  virtual void LockCursor() OVERRIDE;
-  virtual void UnlockCursor() OVERRIDE;
-
- private:
-  friend class test::CursorManagerTestApi;
-
-  void SetCursorInternal(gfx::NativeCursor cursor);
-  void SetCursorVisibility(bool visible);
-  void SetMouseEventsEnabled(bool enabled);
-
-  // Returns the current cursor.
-  gfx::NativeCursor GetCurrentCursor() const;
-
-  // Number of times LockCursor() has been invoked without a corresponding
-  // UnlockCursor().
-  int cursor_lock_count_;
-
-  // The cursor location where the cursor was disabled.
-  gfx::Point disabled_cursor_location_;
-
-  // The current state of the cursor.
-  scoped_ptr<internal::CursorState> current_state_;
-
-  // The cursor state to restore when the cursor is unlocked.
-  scoped_ptr<internal::CursorState> state_on_unlock_;
-
-  scoped_ptr<ImageCursors> image_cursors_;
-
-  DISALLOW_COPY_AND_ASSIGN(CursorManager);
-};
-
-}  // namespace ash
-
-#endif  // UI_AURA_CURSOR_MANAGER_H_