bool
WidgetEvent::IsAllowedToDispatchDOMEvent() const
{
switch (eventStructType) {
case NS_MOUSE_EVENT:
case NS_POINTER_EVENT:
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (nsEventStateManager::PreHandleEvent), but not mousemove
// DOM events.
// Synthesized button up events also do not cause DOM events because they
// do not have a reliable refPoint.
return AsMouseEvent()->reason == WidgetMouseEvent::eReal;
case NS_WHEEL_EVENT: {
// wheel event whose all delta values are zero by user pref applied, it
// shouldn't cause a DOM event.
const WidgetWheelEvent* wheelEvent = AsWheelEvent();
return wheelEvent->deltaX != 0.0 || wheelEvent->deltaY != 0.0 ||
wheelEvent->deltaZ != 0.0;
}
default:
return true;
}
}
bool
WidgetEvent::IsAllowedToDispatchDOMEvent() const
{
switch (mClass) {
case eMouseEventClass:
case ePointerEventClass:
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (EventStateManager::PreHandleEvent), but not mousemove
// DOM events.
// Synthesized button up events also do not cause DOM events because they
// do not have a reliable refPoint.
return AsMouseEvent()->reason == WidgetMouseEvent::eReal;
case eWheelEventClass: {
// wheel event whose all delta values are zero by user pref applied, it
// shouldn't cause a DOM event.
const WidgetWheelEvent* wheelEvent = AsWheelEvent();
return wheelEvent->deltaX != 0.0 || wheelEvent->deltaY != 0.0 ||
wheelEvent->deltaZ != 0.0;
}
// Following events are handled in EventStateManager, so, we don't need to
// dispatch DOM event for them into the DOM tree.
case eQueryContentEventClass:
case eSelectionEventClass:
case eContentCommandEventClass:
return false;
default:
return true;
}
}
bool
WidgetEvent::IsAllowedToDispatchDOMEvent() const
{
switch (mClass) {
case eMouseEventClass:
// When content PreventDefault on ePointerDown, we will stop dispatching
// the subsequent mouse events (eMouseDown, eMouseUp, eMouseMove). But we
// still need the mouse events to be handled in EventStateManager to
// generate other events (e.g. eMouseClick). So we only stop dispatching
// them to DOM.
if (DefaultPreventedByContent() &&
(mMessage == eMouseMove || mMessage == eMouseDown ||
mMessage == eMouseUp)) {
return false;
}
if (mMessage == eMouseTouchDrag) {
return false;
}
MOZ_FALLTHROUGH;
case ePointerEventClass:
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (EventStateManager::PreHandleEvent), but not mousemove
// DOM events.
// Synthesized button up events also do not cause DOM events because they
// do not have a reliable mRefPoint.
return AsMouseEvent()->mReason == WidgetMouseEvent::eReal;
case eWheelEventClass: {
// wheel event whose all delta values are zero by user pref applied, it
// shouldn't cause a DOM event.
const WidgetWheelEvent* wheelEvent = AsWheelEvent();
return wheelEvent->mDeltaX != 0.0 || wheelEvent->mDeltaY != 0.0 ||
wheelEvent->mDeltaZ != 0.0;
}
case eTouchEventClass:
return mMessage != eTouchPointerCancel;
// Following events are handled in EventStateManager, so, we don't need to
// dispatch DOM event for them into the DOM tree.
case eQueryContentEventClass:
case eSelectionEventClass:
case eContentCommandEventClass:
return false;
default:
return true;
}
}
