src/ui/events/ozone/evdev/event_factory_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_FACTORY_EVDEV_H_
   6 #define UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_
   7
   8 #include "base/callback.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/files/file_path.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/task_runner.h"
  13 #include "ui/events/events_export.h"
  14 #include "ui/events/ozone/evdev/event_converter_evdev.h"
  15 #include "ui/events/ozone/evdev/event_modifiers_evdev.h"
  16 #include "ui/events/ozone/event_factory_ozone.h"
  17
  18 namespace ui {
  19
  20 class DeviceManagerEvdev;
  21
  22 // Ozone events implementation for the Linux input subsystem ("evdev").
  23 class EVENTS_EXPORT EventFactoryEvdev : public EventFactoryOzone {
  24  public:
  25   EventFactoryEvdev();
  26   virtual ~EventFactoryEvdev();
  27
  28   virtual void StartProcessingEvents() OVERRIDE;
  29
  30   // Set task runner to use for device polling & initialization.
  31   virtual void SetFileTaskRunner(scoped_refptr<base::TaskRunner> task_runner)
  32       OVERRIDE;
  33
  34  private:
  35   // Open device at path & starting processing events (on UI thread).
  36   void AttachInputDevice(const base::FilePath& file_path,
  37                          scoped_ptr<EventConverterEvdev> converter);
  38
  39   // Close device at path (on UI thread).
  40   void DetachInputDevice(const base::FilePath& file_path);
  41
  42   // Callback for device add (on UI thread).
  43   void OnDeviceAdded(const base::FilePath& path);
  44
  45   // Callback for device remove (on UI thread).
  46   void OnDeviceRemoved(const base::FilePath& path);
  47
  48   // Owned per-device event converters (by path).
  49   std::map<base::FilePath, EventConverterEvdev*> converters_;
  50
  51   // Interface for scanning & monitoring input devices.
  52   scoped_ptr<DeviceManagerEvdev> device_manager_;
  53
  54   // Task runner for event dispatch.
  55   scoped_refptr<base::TaskRunner> ui_task_runner_;
  56
  57   // Task runner for file I/O.
  58   scoped_refptr<base::TaskRunner> file_task_runner_;
  59
  60   // Modifier key state (shift, ctrl, etc).
  61   EventModifiersEvdev modifiers_;
  62
  63   // Support weak pointers for attach & detach callbacks.
  64   base::WeakPtrFactory<EventFactoryEvdev> weak_ptr_factory_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(EventFactoryEvdev);
  67 };
  68
  69 }  // namespace ui
  70
  71 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_