Implement cursor compositing mode on Ash

ash/display/cursor_window_controller.h

Index: ash/display/cursor_window_controller.h
diff --git a/ash/display/cursor_window_controller.h b/ash/display/cursor_window_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..5e4d141d60c6f501604a708bf7d1ea7cf890b0fe
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+++ b/ash/display/cursor_window_controller.h
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+// Copyright 2014 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_DISPLAY_CURSOR_WINDOW_CONTROLLER_H_
+#define ASH_DISPLAY_CURSOR_WINDOW_CONTROLLER_H_
+
+#include "ui/aura/window.h"
+#include "ui/base/cursor/cursor.h"
+#include "ui/gfx/display.h"
+
+namespace ash {
+namespace test{
+class MirrorWindowTestApi;
+}
+
+namespace internal {
+
+class CursorWindowDelegate;
+
+// Draws a mouse cursor on a given container window.
+// In the non-mirroring mode, the CursorWindowController draws the cursor as-is.
+// In the mirroring mode, the CursorWindowController is responsible to scale and
+// rotate the mouse cursor bitmap to match settings of the primary display.
+class CursorWindowController {
+ public:
+  CursorWindowController(bool for_mirroring);
+  virtual ~CursorWindowController();
+
+  // Initializes cursor window for a given container window.
+  void InitCursorWindow(aura::Window* container);
+
+  // Closes cursor window.
+  void CloseCursorWindow();
+
+  // Sets cursor location, shape, set and visibility.
+  void UpdateCursorLocation();
+  void SetCursor(gfx::NativeCursor cursor);
+  void SetCursorSet(ui::CursorSetType);
+  void SetCursorVisibility(bool visible);
+
+ private:
+  friend class test::MirrorWindowTestApi;
+
+  bool for_mirroring_;
+  int current_cursor_type_;
+  ui::CursorSetType current_cursor_set_;
+  ui::CursorSetType requested_cursor_set_;
+  gfx::Display::Rotation current_cursor_rotation_;
+  gfx::Point hot_point_;
+
+  aura::Window* cursor_window_;  // owned by container window.
+  scoped_ptr<CursorWindowDelegate> cursor_window_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(CursorWindowController);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_DISPLAY_CURSOR_WINDOW_CONTROLLER_H_