void
TouchBlockState::DispatchEvent(const InputData& aEvent) const
{
  MOZ_ASSERT(aEvent.mInputType == MULTITOUCH_INPUT);
  mTouchCounter.Update(aEvent.AsMultiTouchInput());
  CancelableBlockState::DispatchEvent(aEvent);
}
nsEventStatus
InputQueue::ReceiveInputEvent(const RefPtr<AsyncPanZoomController>& aTarget,
                              bool aTargetConfirmed,
                              const InputData& aEvent,
                              uint64_t* aOutInputBlockId) {
  APZThreadUtils::AssertOnControllerThread();

  switch (aEvent.mInputType) {
    case MULTITOUCH_INPUT: {
      const MultiTouchInput& event = aEvent.AsMultiTouchInput();
      return ReceiveTouchInput(aTarget, aTargetConfirmed, event, aOutInputBlockId);
    }

    case SCROLLWHEEL_INPUT: {
      const ScrollWheelInput& event = aEvent.AsScrollWheelInput();
      return ReceiveScrollWheelInput(aTarget, aTargetConfirmed, event, aOutInputBlockId);
    }

    case PANGESTURE_INPUT: {
      const PanGestureInput& event = aEvent.AsPanGestureInput();
      return ReceivePanGestureInput(aTarget, aTargetConfirmed, event, aOutInputBlockId);
    }

    default:
      // The return value for non-touch input is only used by tests, so just pass
      // through the return value for now. This can be changed later if needed.
      // TODO (bug 1098430): we will eventually need to have smarter handling for
      // non-touch events as well.
      return aTarget->HandleInputEvent(aEvent, aTarget->GetTransformToThis());
  }
}
nsEventStatus AsyncPanZoomController::HandleInputEvent(const InputData& aEvent) {
  nsEventStatus rv = nsEventStatus_eIgnore;

  if (mGestureEventListener) {
    nsEventStatus rv = mGestureEventListener->HandleInputEvent(aEvent);
    if (rv == nsEventStatus_eConsumeNoDefault)
      return rv;
  }

  switch (aEvent.mInputType) {
  case MULTITOUCH_INPUT: {
    const MultiTouchInput& multiTouchInput = aEvent.AsMultiTouchInput();
    switch (multiTouchInput.mType) {
      case MultiTouchInput::MULTITOUCH_START: rv = OnTouchStart(multiTouchInput); break;
      case MultiTouchInput::MULTITOUCH_MOVE: rv = OnTouchMove(multiTouchInput); break;
      case MultiTouchInput::MULTITOUCH_END: rv = OnTouchEnd(multiTouchInput); break;
      case MultiTouchInput::MULTITOUCH_CANCEL: rv = OnTouchCancel(multiTouchInput); break;
      default: NS_WARNING("Unhandled multitouch"); break;
    }
    break;
  }
  case PINCHGESTURE_INPUT: {
    const PinchGestureInput& pinchGestureInput = aEvent.AsPinchGestureInput();
    switch (pinchGestureInput.mType) {
      case PinchGestureInput::PINCHGESTURE_START: rv = OnScaleBegin(pinchGestureInput); break;
      case PinchGestureInput::PINCHGESTURE_SCALE: rv = OnScale(pinchGestureInput); break;
      case PinchGestureInput::PINCHGESTURE_END: rv = OnScaleEnd(pinchGestureInput); break;
      default: NS_WARNING("Unhandled pinch gesture"); break;
    }
    break;
  }
  case TAPGESTURE_INPUT: {
    const TapGestureInput& tapGestureInput = aEvent.AsTapGestureInput();
    switch (tapGestureInput.mType) {
      case TapGestureInput::TAPGESTURE_LONG: rv = OnLongPress(tapGestureInput); break;
      case TapGestureInput::TAPGESTURE_UP: rv = OnSingleTapUp(tapGestureInput); break;
      case TapGestureInput::TAPGESTURE_CONFIRMED: rv = OnSingleTapConfirmed(tapGestureInput); break;
      case TapGestureInput::TAPGESTURE_DOUBLE: rv = OnDoubleTap(tapGestureInput); break;
      case TapGestureInput::TAPGESTURE_CANCEL: rv = OnCancelTap(tapGestureInput); break;
      default: NS_WARNING("Unhandled tap gesture"); break;
    }
    break;
  }
  default: NS_WARNING("Unhandled input event"); break;
  }

  mLastEventTime = aEvent.mTime;
  return rv;
}
nsEventStatus
APZCTreeManagerChild::ReceiveInputEvent(
    InputData& aEvent,
    ScrollableLayerGuid* aOutTargetGuid,
    uint64_t* aOutInputBlockId)
{
  switch (aEvent.mInputType) {
  case MULTITOUCH_INPUT: {
    MultiTouchInput& event = aEvent.AsMultiTouchInput();
    MultiTouchInput processedEvent;

    nsEventStatus res;
    SendReceiveMultiTouchInputEvent(event,
                                    &res,
                                    &processedEvent,
                                    aOutTargetGuid,
                                    aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  case MOUSE_INPUT: {
    MouseInput& event = aEvent.AsMouseInput();
    MouseInput processedEvent;

    nsEventStatus res;
    SendReceiveMouseInputEvent(event,
                               &res,
                               &processedEvent,
                               aOutTargetGuid,
                               aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  case PANGESTURE_INPUT: {
    PanGestureInput& event = aEvent.AsPanGestureInput();
    PanGestureInput processedEvent;

    nsEventStatus res;
    SendReceivePanGestureInputEvent(event,
                                    &res,
                                    &processedEvent,
                                    aOutTargetGuid,
                                    aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  case PINCHGESTURE_INPUT: {
    PinchGestureInput& event = aEvent.AsPinchGestureInput();
    PinchGestureInput processedEvent;

    nsEventStatus res;
    SendReceivePinchGestureInputEvent(event,
                                      &res,
                                      &processedEvent,
                                      aOutTargetGuid,
                                      aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  case TAPGESTURE_INPUT: {
    TapGestureInput& event = aEvent.AsTapGestureInput();
    TapGestureInput processedEvent;

    nsEventStatus res;
    SendReceiveTapGestureInputEvent(event,
                                    &res,
                                    &processedEvent,
                                    aOutTargetGuid,
                                    aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  case SCROLLWHEEL_INPUT: {
    ScrollWheelInput& event = aEvent.AsScrollWheelInput();
    ScrollWheelInput processedEvent;

    nsEventStatus res;
    SendReceiveScrollWheelInputEvent(event,
                                     &res,
                                     &processedEvent,
                                     aOutTargetGuid,
                                     aOutInputBlockId);

    event = processedEvent;
    return res;
  }
  default: {
    MOZ_ASSERT_UNREACHABLE("Invalid InputData type.");
    return nsEventStatus_eConsumeNoDefault;
  }
  }
}