Implement cursor changing on Mushrome

ash/wm/ash_native_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_ASH_NATIVE_CURSOR_MANAGER_H_
 #define ASH_WM_ASH_NATIVE_CURSOR_MANAGER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
+#include "ui/display/display.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/wm/core/native_cursor_manager.h"
 #include "ui/wm/core/native_cursor_manager_delegate.h"
 
-namespace ui {
-class ImageCursors;
-}
-
 namespace ash {
 
-namespace test {
-class CursorManagerTestApi;
-}
-
-// This does the ash-specific setting of cursor details like cursor
-// visibility. It communicates back with the CursorManager through the
-// NativeCursorManagerDelegate interface, which receives messages about what
-// changes were acted on.
+// Ash specific extensions to NativeCursorManager. This lets us switch whether
+// we're using the native cursor, along with exposing additional data about how
+// we're going to render cursors.
 class ASH_EXPORT AshNativeCursorManager : public ::wm::NativeCursorManager {
  public:
   AshNativeCursorManager();
   ~AshNativeCursorManager() override;
 
   // Toggle native cursor enabled/disabled.
   // The native cursor is enabled by default. When disabled, we hide the native
   // cursor regardless of visibility state, and let CursorWindowManager draw
   // the cursor.
-  void SetNativeCursorEnabled(bool enabled);
+  virtual void SetNativeCursorEnabled(bool enabled) = 0;
+
+  // Returns the scale and rotation of the currently loaded cursor.
+  virtual float GetScale() const = 0;
+  virtual display::Display::Rotation GetRotation() const = 0;
 
  private:
-  friend class test::CursorManagerTestApi;
-
-  // Overridden from ::wm::NativeCursorManager:
-  void SetDisplay(const display::Display& display,
-                  ::wm::NativeCursorManagerDelegate* delegate) override;
-  void SetCursor(gfx::NativeCursor cursor,
-                 ::wm::NativeCursorManagerDelegate* delegate) override;
-  void SetVisibility(bool visible,
-                     ::wm::NativeCursorManagerDelegate* delegate) override;
-  void SetCursorSet(ui::CursorSetType cursor_set,
-                    ::wm::NativeCursorManagerDelegate* delegate) override;
-  void SetMouseEventsEnabled(
-      bool enabled,
-      ::wm::NativeCursorManagerDelegate* delegate) override;
-
-  // The cursor location where the cursor was disabled.
-  gfx::Point disabled_cursor_location_;
-
-  bool native_cursor_enabled_;
-
-  std::unique_ptr<ui::ImageCursors> image_cursors_;
-
   DISALLOW_COPY_AND_ASSIGN(AshNativeCursorManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_ASH_NATIVE_CURSOR_MANAGER_H_