ui/events/ozone/evdev/mouse_button_map_evdev.h

   1 // Copyright 2014 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_EVENTS_OZONE_EVDEV_MOUSE_BUTTON_MAP_EVDEV_H_
   6 #define UI_EVENTS_OZONE_EVDEV_MOUSE_BUTTON_MAP_EVDEV_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
  12
  13 namespace ui {
  14
  15 // Mouse button map for Evdev.
  16 //
  17 // Chrome relies on the underlying OS to interpret mouse buttons. The Linux
  18 // input subsystem does not assign any special meaning to these keys, so
  19 // this work must happen at a higher layer (normally X11 or the console driver).
  20 // When using evdev directly, we must do it ourselves.
  21 //
  22 // The mouse button map is shared between all input devices connected to the
  23 // system.
  24 class EVENTS_OZONE_EVDEV_EXPORT MouseButtonMapEvdev {
  25  public:
  26   typedef uint32_t Button;
  27   typedef std::map<uint32_t, uint32_t> ButtonMap;
  28
  29   MouseButtonMapEvdev();
  30   ~MouseButtonMapEvdev();
  31
  32   // Set mapping for one button.
  33   void UpdateButtonMap(Button button_from, Button button_to);
  34
  35   // Reset the button map to the system default.
  36   void ResetButtonMap();
  37
  38   // Return the mapped button.
  39   int GetMappedButton(const Button button) const;
  40
  41   // Return current button map to use for incoming events.
  42   const ButtonMap& button_map() { return button_map_; }
  43
  44  private:
  45   // Mouse button map.
  46   ButtonMap button_map_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(MouseButtonMapEvdev);
  49 };
  50
  51 }  // namspace ui
  52
  53 #endif  // UI_EVENTS_OZONE_EVDEV_MOUSE_BUTTON_MAP_EVDEV_H_