ozone: evdev: Dispatch key events from gestures devices

ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_
 #define UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_
 
 #include <gestures/gestures.h>
 #include <libevdev/libevdev.h>
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
+#include "ui/events/ozone/evdev/event_device_util.h"
 #include "ui/events/ozone/evdev/event_dispatch_callback.h"
 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
 #include "ui/events/ozone/evdev/libgestures_glue/event_reader_libevdev_cros.h"
 
 namespace ui {
 
 class EventDeviceInfo;
 class EventModifiersEvdev;
 class CursorDelegateEvdev;
+class KeyboardEvdev;
 
 // Convert libevdev-cros events to ui::Events using libgestures.
 //
 // This builds a GestureInterpreter for an input device (touchpad or
 // mouse).
 //
 // Raw input events must be preprocessed into a form suitable for
 // libgestures. The kernel protocol only emits changes to the device state,
 // so changes must be accumulated until a sync event. The full device state
 // at sync is then processed by libgestures.
 //
 // Once we have the state at sync, we convert it to a HardwareState object
 // and forward it to libgestures. If any gestures are produced, they are
 // converted to ui::Events and dispatched.
 class EVENTS_OZONE_EVDEV_EXPORT GestureInterpreterLibevdevCros
     : public EventReaderLibevdevCros::Delegate {
  public:
   GestureInterpreterLibevdevCros(EventModifiersEvdev* modifiers,
                                  CursorDelegateEvdev* cursor,
+                                 KeyboardEvdev* keyboard,
                                  const EventDispatchCallback& callback);
   virtual ~GestureInterpreterLibevdevCros();
 
   // Overriden from ui::EventReaderLibevdevCros::Delegate
   virtual void OnLibEvdevCrosOpen(Evdev* evdev,
                                   EventStateRec* evstate) override;
   virtual void OnLibEvdevCrosEvent(Evdev* evdev,
                                    EventStateRec* evstate,
                                    const timeval& time) override;
 
   // Handler for gesture events generated from libgestures.
   void OnGestureReady(const Gesture* gesture);
 
  private:
   void OnGestureMove(const Gesture* gesture, const GestureMove* move);
   void OnGestureScroll(const Gesture* gesture, const GestureScroll* move);
   void OnGestureButtonsChange(const Gesture* gesture,
                               const GestureButtonsChange* move);
   void OnGestureContactInitiated(const Gesture* gesture);
   void OnGestureFling(const Gesture* gesture, const GestureFling* fling);
   void OnGestureSwipe(const Gesture* gesture, const GestureSwipe* swipe);
   void OnGestureSwipeLift(const Gesture* gesture,
                           const GestureSwipeLift* swipelift);
   void OnGesturePinch(const Gesture* gesture, const GesturePinch* pinch);
   void OnGestureMetrics(const Gesture* gesture, const GestureMetrics* metrics);
 
   void Dispatch(Event* event);
   void DispatchMouseButton(unsigned int modifier, bool down);
+  void DispatchChangedKeys(Evdev* evdev, const timeval& time);
 
   // Shared modifier state.
   EventModifiersEvdev* modifiers_;
 
   // Shared cursor state.
   CursorDelegateEvdev* cursor_;
 
+  // Shared keyboard state.
+  KeyboardEvdev* keyboard_;
+
   // Callback for dispatching events.
   EventDispatchCallback dispatch_callback_;
 
   // Gestures interpretation state.
   gestures::GestureInterpreter* interpreter_;
 
+  // Last key state from libevdev.
+  unsigned long prev_key_state_[EVDEV_BITS_TO_LONGS(KEY_CNT)];
+
   DISALLOW_COPY_AND_ASSIGN(GestureInterpreterLibevdevCros);
 };
 
 }  // namspace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_GESTURE_INTERPRETER_LIBEVDEV_CROS_H_