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                             CursorDelegateEvdev* cursor,
  30                             const EventDeviceInfo& info,
  31                             DeviceEventDispatcherEvdev* dispatcher);
  32   ~TabletEventConverterEvdev() override;
  33
  34   // EventConverterEvdev:
  35   void OnFileCanReadWithoutBlocking(int fd) override;
  36
  37   void ProcessEvents(const struct input_event* inputs, int count);
  38
  39  private:
  40   friend class MockTabletEventConverterEvdev;
  41   void ConvertKeyEvent(const input_event& input);
  42   void ConvertAbsEvent(const input_event& input);
  43   void DispatchMouseButton(const input_event& input);
  44   void UpdateCursor();
  45
  46   // Flush events delimited by EV_SYN. This is useful for handling
  47   // non-axis-aligned movement properly.
  48   void FlushEvents(const input_event& input);
  49
  50   // Controller for watching the input fd.
  51   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
  52
  53   // Shared cursor state.
  54   CursorDelegateEvdev* cursor_;
  55
  56   // Dispatcher for events.
  57   DeviceEventDispatcherEvdev* dispatcher_;
  58
  59   int y_abs_location_ = 0;
  60   int x_abs_location_ = 0;
  61   int x_abs_min_;
  62   int y_abs_min_;
  63   int x_abs_range_;
  64   int y_abs_range_;
  65
  66   // BTN_TOOL_ code for the active device
  67   int stylus_ = 0;
  68
  69   // Whether we need to move the cursor
  70   bool abs_value_dirty_ = false;
  71
  72   // Set if we drop events in kernel (SYN_DROPPED) or in process.
  73   bool dropped_events_ = false;
  74
  75   DISALLOW_COPY_AND_ASSIGN(TabletEventConverterEvdev);
  76 };
  77
  78 }  // namespace ui
  79
  80 #endif  // UI_EVENTS_OZONE_TABLET_EVENT_CONVERTER_EVDEV_H_