ui/events/ozone/evdev/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_EVDEV_EVENT_CONVERTER_EVDEV_H_
   6 #define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_
   7
   8 #include <set>
   9
  10 #include "base/callback.h"
  11 #include "base/files/file_path.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "ui/events/devices/input_device.h"
  14 #include "ui/events/ozone/evdev/event_dispatch_callback.h"
  15 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
  16 #include "ui/gfx/geometry/size.h"
  17
  18 struct input_event;
  19
  20 namespace ui {
  21 enum class DomCode;
  22
  23 class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdev
  24     : public base::MessagePumpLibevent::Watcher {
  25  public:
  26   EventConverterEvdev(int fd,
  27                       const base::FilePath& path,
  28                       int id,
  29                       InputDeviceType type);
  30   ~EventConverterEvdev() override;
  31
  32   int id() const { return id_; }
  33
  34   const base::FilePath& path() const { return path_; }
  35
  36   InputDeviceType type() const { return type_; }
  37
  38   void set_ignore_events(bool ignore_events) { ignore_events_ = ignore_events; }
  39
  40   // Start reading events.
  41   void Start();
  42
  43   // Stop reading events.
  44   void Stop();
  45
  46   // Cleanup after we stop reading events (release buttons, etc).
  47   virtual void OnStopped();
  48
  49   // Returns true if the converter is used for a keyboard device.
  50   virtual bool HasKeyboard() const;
  51
  52   // Returns true if the converter is used for a mouse device;
  53   virtual bool HasMouse() const;
  54
  55   // Returns true if the converter is used for a touchpad device.
  56   virtual bool HasTouchpad() const;
  57
  58   // Returns true if the converter is used for a touchscreen device.
  59   virtual bool HasTouchscreen() const;
  60
  61   // Returns true if the converter is used for a device with a caps lock LED.
  62   virtual bool HasCapsLockLed() const;
  63
  64   // Returns the size of the touchscreen device if the converter is used for a
  65   // touchscreen device.
  66   virtual gfx::Size GetTouchscreenSize() const;
  67
  68   // Returns the number of touch points this device supports. Should not be
  69   // called unless HasTouchscreen() returns true
  70   virtual int GetTouchPoints() const;
  71
  72   // Sets which keyboard keys should be processed.
  73   virtual void SetAllowedKeys(scoped_ptr<std::set<DomCode>> allowed_keys);
  74
  75   // Allows all keys to be processed.
  76   virtual void AllowAllKeys();
  77
  78   // Update caps lock LED state.
  79   virtual void SetCapsLockLed(bool enabled);
  80
  81   // Helper to generate a base::TimeDelta from an input_event's time
  82   static base::TimeDelta TimeDeltaFromInputEvent(const input_event& event);
  83
  84  protected:
  85   // base::MessagePumpLibevent::Watcher:
  86   void OnFileCanWriteWithoutBlocking(int fd) override;
  87
  88   // File descriptor to read.
  89   int fd_;
  90
  91   // Path to input device.
  92   base::FilePath path_;
  93
  94   // Uniquely identifies an event converter.
  95   int id_;
  96
  97   // Type (internal or external).
  98   InputDeviceType type_;
  99
 100   // Whether events from the device should be ignored.
 101   bool ignore_events_;
 102
 103   // Controller for watching the input fd.
 104   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
 105
 106  private:
 107   DISALLOW_COPY_AND_ASSIGN(EventConverterEvdev);
 108 };
 109
 110 }  // namespace ui
 111
 112 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_