ui/events/ozone/evdev/tablet_event_converter_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_TABLET_EVENT_CONVERTER_EVDEV_H_
   6 #define UI_EVENTS_OZONE_TABLET_EVENT_CONVERTER_EVDEV_H_
   7
   8 #include "base/files/file_path.h"
   9 #include "base/message_loop/message_pump_libevent.h"
  10 #include "ui/events/event.h"
  11 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
  12 #include "ui/events/ozone/evdev/event_converter_evdev.h"
  13 #include "ui/events/ozone/evdev/event_device_info.h"
  14 #include "ui/events/ozone/evdev/event_modifiers_evdev.h"
  15 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
  16
  17 struct input_event;
  18
  19 namespace ui {
  20
  21 class DeviceEventDispatcherEvdev;
  22
  23 class EVENTS_OZONE_EVDEV_EXPORT TabletEventConverterEvdev
  24     : public EventConverterEvdev {
  25  public:
  26   TabletEventConverterEvdev(int fd,
  27                             base::FilePath path,
  28                             int id,
  29                             InputDeviceType type,
  30                             CursorDelegateEvdev* cursor,
  31                             const EventDeviceInfo& info,
  32                             DeviceEventDispatcherEvdev* dispatcher);
  33   ~TabletEventConverterEvdev() override;
  34
  35   // EventConverterEvdev:
  36   void OnFileCanReadWithoutBlocking(int fd) override;
  37
  38   void ProcessEvents(const struct input_event* inputs, int count);
  39
  40  private:
  41   friend class MockTabletEventConverterEvdev;
  42   void ConvertKeyEvent(const input_event& input);
  43   void ConvertAbsEvent(const input_event& input);
  44   void DispatchMouseButton(const input_event& input);
  45   void UpdateCursor();
  46
  47   // Flush events delimited by EV_SYN. This is useful for handling
  48   // non-axis-aligned movement properly.
  49   void FlushEvents();
  50
  51   // Controller for watching the input fd.
  52   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
  53
  54   // Shared cursor state.
  55   CursorDelegateEvdev* cursor_;
  56
  57   // Dispatcher for events.
  58   DeviceEventDispatcherEvdev* dispatcher_;
  59
  60   int y_abs_location_;
  61   int x_abs_location_;
  62   int x_abs_min_;
  63   int y_abs_min_;
  64   int x_abs_range_;
  65   int y_abs_range_;
  66
  67   // BTN_TOOL_ code for the active device
  68   int stylus_;
  69
  70   // Whether we need to move the cursor
  71   bool abs_value_dirty_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(TabletEventConverterEvdev);
  74 };
  75
  76 }  // namespace ui
  77
  78 #endif  // UI_EVENTS_OZONE_TABLET_EVENT_CONVERTER_EVDEV_H_