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

ui/views/corewm/cursor_controller.h

+// Copyright (c) 2013 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 UI_VIEWS_COREWM_CURSOR_CONTROLLER_H_
+#define UI_VIEWS_COREWM_CURSOR_CONTROLLER_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"
+#include "ui/views/views_export.h"
+
+namespace views {
+namespace corewm {
+
+namespace internal {
+class CursorState;
+}
+
+// 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 VIEWS_EXPORT CursorController : public aura::client::CursorClient {
+public:

[mazda, 2013/02/15 01:40:12]

Need one space.

+  CursorController();
+  virtual ~CursorController();
+
+  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 LockCursor() OVERRIDE;
+  virtual void UnlockCursor() OVERRIDE;
+
+protected:

[mazda, 2013/02/15 01:40:12]

Ditto.

+  // Returns the current cursor.
+  gfx::NativeCursor GetCurrentCursor() const;
+
+  // Subclasses of CursorController control the actual assignment of cursors
+  // through the following template methods.
+
+  // Called to set the current cursor. Subclasses that need to set platform
+  // state should call the base method from their override after mutating their
+  // incoming cursor with their platform state.
+  virtual void SetCursorInternal(gfx::NativeCursor cursor);
+
+  // Called to set the visibility. Subclasses should call the base method first
+  // and then do platform visibility mutation.
+  virtual void SetCursorVisibility(bool visible);
+
+  // Called to set whether mouse events are enabled. Subclasses should call the
+  // base method first and then restore whatever state is necessary on their
+  // platform.
+  virtual void SetMouseEventsEnabled(bool enabled);
+
+private:

[mazda, 2013/02/15 01:40:12]

Ditto.

+  // Number of times LockCursor() has been invoked without a corresponding
+  // UnlockCursor().
+  int cursor_lock_count_;
+
+  // 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_;
+
+  DISALLOW_COPY_AND_ASSIGN(CursorController);
+};
+
+}  // namespace corewm
+}  // namespace views
+
+#endif  // UI_VIEWS_COREWM_CURSOR_CONTROLLER_H_