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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_BASE_CURSOR_CURSOR_LOADER_X11_H_
      6 #define UI_BASE_CURSOR_CURSOR_LOADER_X11_H_
      7 
      8 #include <X11/Xcursor/Xcursor.h>
      9 #include <map>
     10 
     11 #include "base/compiler_specific.h"
     12 #include "ui/base/cursor/cursor.h"
     13 #include "ui/base/cursor/cursor_loader.h"
     14 #include "ui/base/ui_export.h"
     15 #include "ui/base/x/x11_util.h"
     16 #include "ui/gfx/display.h"
     17 
     18 namespace ui {
     19 
     20 class UI_EXPORT CursorLoaderX11 : public CursorLoader {
     21  public:
     22   CursorLoaderX11();
     23   virtual ~CursorLoaderX11();
     24 
     25   // Overridden from CursorLoader:
     26   virtual void LoadImageCursor(int id,
     27                                int resource_id,
     28                                const gfx::Point& hot) OVERRIDE;
     29   virtual void LoadAnimatedCursor(int id,
     30                                   int resource_id,
     31                                   const gfx::Point& hot,
     32                                   int frame_delay_ms) OVERRIDE;
     33   virtual void UnloadAll() OVERRIDE;
     34   virtual void SetPlatformCursor(gfx::NativeCursor* cursor) OVERRIDE;
     35 
     36  private:
     37   // Returns true if we have an image resource loaded for the |native_cursor|.
     38   bool IsImageCursor(gfx::NativeCursor native_cursor);
     39 
     40   // Gets the X Cursor corresponding to the |native_cursor|.
     41   ::Cursor ImageCursorFromNative(gfx::NativeCursor native_cursor);
     42 
     43   // A map to hold all image cursors. It maps the cursor ID to the X Cursor.
     44   typedef std::map<int, ::Cursor> ImageCursorMap;
     45   ImageCursorMap cursors_;
     46 
     47   // A map to hold all animated cursors. It maps the cursor ID to the pair of
     48   // the X Cursor and the corresponding XcursorImages. We need a pointer to the
     49   // images so that we can free them on destruction.
     50   typedef std::map<int, std::pair< ::Cursor, XcursorImages*> >
     51       AnimatedCursorMap;
     52   AnimatedCursorMap animated_cursors_;
     53 
     54   const XScopedCursor invisible_cursor_;
     55 
     56   DISALLOW_COPY_AND_ASSIGN(CursorLoaderX11);
     57 };
     58 
     59 // Scale and rotate the cursor's bitmap and hotpoint.
     60 // |bitmap_in_out| and |hotpoint_in_out| are used as
     61 // both input and output.
     62 UI_EXPORT void ScaleAndRotateCursorBitmapAndHotpoint(
     63     float scale,
     64     gfx::Display::Rotation rotation,
     65     SkBitmap* bitmap_in_out,
     66     gfx::Point* hotpoint_in_out);
     67 
     68 }  // namespace ui
     69 
     70 #endif  // UI_BASE_CURSOR_CURSOR_LOADER_X11_H_
     71