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/ozone/device/device_event_observer.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/evdev/events_ozone_evdev_export.h"
  17 #include "ui/events/platform/platform_event_source.h"
  18 #include "ui/gfx/native_widget_types.h"
  19
  20 namespace gfx {
  21 class PointF;
  22 }  // namespace gfx
  23
  24 namespace ui {
  25
  26 class CursorDelegateEvdev;
  27 class DeviceManager;
  28
  29 // Ozone events implementation for the Linux input subsystem ("evdev").
  30 class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public DeviceEventObserver,
  31                                                     public PlatformEventSource {
  32  public:
  33   EventFactoryEvdev(CursorDelegateEvdev* cursor,
  34                     DeviceManager* device_manager);
  35   virtual ~EventFactoryEvdev();
  36
  37   void DispatchUiEvent(Event* event);
  38
  39   void WarpCursorTo(gfx::AcceleratedWidget widget,
  40                     const gfx::PointF& location);
  41
  42  private:
  43   // Open device at path & starting processing events (on UI thread).
  44   void AttachInputDevice(const base::FilePath& file_path,
  45                          scoped_ptr<EventConverterEvdev> converter);
  46
  47   // Close device at path (on UI thread).
  48   void DetachInputDevice(const base::FilePath& file_path);
  49
  50   // DeviceEventObserver overrides:
  51   //
  52   // Callback for device add (on UI thread).
  53   virtual void OnDeviceEvent(const DeviceEvent& event) OVERRIDE;
  54
  55   // PlatformEventSource:
  56   virtual void OnDispatcherListChanged() OVERRIDE;
  57
  58   // Owned per-device event converters (by path).
  59   std::map<base::FilePath, EventConverterEvdev*> converters_;
  60
  61   // Interface for scanning & monitoring input devices.
  62   DeviceManager* device_manager_;  // Not owned.
  63
  64   // Task runner for event dispatch.
  65   scoped_refptr<base::TaskRunner> ui_task_runner_;
  66
  67   // Modifier key state (shift, ctrl, etc).
  68   EventModifiersEvdev modifiers_;
  69
  70   // Cursor movement.
  71   CursorDelegateEvdev* cursor_;
  72
  73   // Dispatch callback for events.
  74   EventDispatchCallback dispatch_callback_;
  75
  76   // Support weak pointers for attach & detach callbacks.
  77   base::WeakPtrFactory<EventFactoryEvdev> weak_ptr_factory_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(EventFactoryEvdev);
  80 };
  81
  82 }  // namespace ui
  83
  84 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_