public static bool dispatch_event_to_target(Event @event, EventTarget target, bool legacyTargetOverrideFlag = false, bool legacyOutputDidListenersThrowFlag = false)
{/* Docs: https://dom.spec.whatwg.org/#dispatching-events */
/* To dispatch an event to a target, with an optional legacy target override flag and an optional legacyOutputDidListenersThrowFlag, run these steps: */
/* 1) Set event’s dispatch flag. */
@event.Flags |= EEventFlags.Dispatch;
/* 2) Let targetOverride be target, if legacy target override flag is not given, and target’s associated Document otherwise. [HTML] */
EventTarget targetOverride = legacyTargetOverrideFlag && target is Node ? (target as Node).ownerDocument : target;
EventTarget activationTarget = null;
bool clearTargets = false;
/* 4) Let relatedTarget be the result of retargeting event’s relatedTarget against target. */
EventTarget relatedTarget = EventCommon.retarget_event(@event.relatedTarget, target);
/* 5) If target is not relatedTarget or target is event’s relatedTarget, then: */
if (!ReferenceEquals(target, relatedTarget) || ReferenceEquals(target, @event.relatedTarget))
{
var touchTargets = new LinkedList <IEventTarget>();
foreach (var touchTarget in @event.TouchTargetList)
{
touchTargets.AddLast(EventCommon.retarget_event(touchTarget, target));
}
/* 3) Append to an event path with event, target, targetOverride, relatedTarget, touchTargets, and false. */
append_to_event_path(@event, target, targetOverride, relatedTarget, touchTargets, false);
/* 4) Let isActivationEvent be true, if event is a MouseEvent object and event’s type attribute is "click", and false otherwise. */
bool isActivationEvent = (@event is MouseEvent mouseEvent && mouseEvent.type == EEventName.Click);
/* 5) If isActivationEvent is true and target has activation behavior, then set activationTarget to target. */
if (isActivationEvent && target.has_activation_behaviour)
{
activationTarget = target;
}
/* 6) Let slotable be target, if target is a slotable and is assigned, and null otherwise. */
var slotable = (target is Node targetNode && targetNode is ISlottable) ? target : null;
bool slotInClosedTree = false;
EventTarget parent = target.get_the_parent(@event);
while (parent is object)
{
/* 1) If slotable is non-null: */
if (slotable is object)
{
/* 1) Assert: parent is a slot. */
if (parent is ISlot)
{
/* 2) Set slotable to null. */
slotable = null;
/* 3) If parent’s root is a shadow root whose mode is "closed", then set slot-in-closed-tree to true. */
if (((Node)parent).getRootNode() is ShadowRoot parentShadow && parentShadow.Mode == Enums.EShadowRootMode.Closed)
{
slotInClosedTree = true;
}
}
}
/* 2) If parent is a slotable and is assigned, then set slotable to parent. */
if (parent is ISlottable && ((ISlottable)parent).isAssigned)
{
slotable = parent;
}
/* 3) Let relatedTarget be the result of retargeting event’s relatedTarget against parent. */
relatedTarget = EventCommon.retarget_event(@event.relatedTarget, parent);
/* 4) Let touchTargets be a new list. */
touchTargets = new LinkedList <IEventTarget>();
/* 5) For each touchTarget of event’s touch target list, append the result of retargeting touchTarget against parent to touchTargets. */
foreach (var touchTarget in @event.TouchTargetList)
{
touchTargets.AddLast(EventCommon.retarget_event(touchTarget, parent));
}
/* 6) If parent is a Window object, or parent is a node and target’s root is a shadow-including inclusive ancestor of parent, then: */
if (parent is Window || (parent is Node && DOMCommon.Is_Shadow_Including_Inclusive_Ancestor((target as Node).getRootNode(), parent as Node)))
{
/* 1) If isActivationEvent is true, event’s bubbles attribute is true, activationTarget is null, and parent has activation behavior, then set activationTarget to parent. */
if (isActivationEvent && @event.bubbles && activationTarget == null && parent.has_activation_behaviour)
{
activationTarget = parent;
}
/* 2) Append to an event path with event, parent, null, relatedTarget, touchTargets, and slot-in-closed-tree. */
EventCommon.append_to_event_path(@event, parent, null, relatedTarget, touchTargets, slotInClosedTree);
}
/* 7) Otherwise, if parent is relatedTarget, then set parent to null. */
else if (ReferenceEquals(parent, relatedTarget))
{
parent = null;
}
/* 8) Otherwise, set target to parent and then: */
else
{
target = parent;
/* 1) If isActivationEvent is true, activationTarget is null, and target has activation behavior, then set activationTarget to target. */
if (isActivationEvent && activationTarget == null && target.has_activation_behaviour)
{
activationTarget = target;
}
/* 2) Append to an event path with event, parent, target, relatedTarget, touchTargets, and slot-in-closed-tree. */
EventCommon.append_to_event_path(@event, parent, target, relatedTarget, touchTargets, slotInClosedTree);
}
/* 9) If parent is non-null, then set parent to the result of invoking parent’s get the parent with event. */
if (parent is object)
{
parent = parent.get_the_parent(@event);
}
/* 10) Set slot-in-closed-tree to false. */
slotInClosedTree = false;
}
/* 10) Let clearTargetsStruct be the last struct in event’s path whose shadow-adjusted target is non-null. */
var clearTargetsStruct = @event.Path.FindLast(p => null != p.shadow_adjusted_target);
/* 11) Let clearTargets be true if clearTargetsStruct’s shadow-adjusted target, clearTargetsStruct’s relatedTarget, or an EventTarget object in clearTargetsStruct’s touch target list is a node and its root is a shadow root, and false otherwise. */
clearTargets = (clearTargetsStruct.shadow_adjusted_target is Node n1 && n1.getRootNode() is ShadowRoot) ||
(clearTargetsStruct.relatedTarget is Node n2 && n2.getRootNode() is ShadowRoot) ||
clearTargetsStruct.touch_target_list.Any(t => t is Node n3 && n3.getRootNode() is ShadowRoot);
/* 12) If activationTarget is non-null and activationTarget has legacy-pre-activation behavior, then run activationTarget’s legacy-pre-activation behavior. */
if (activationTarget is object && activationTarget.has_legacy_activation_behaviour)
{
activationTarget?.legacy_pre_activation_behaviour();
}
/* 13) For each struct in event’s path, in reverse order: */
for (int i = @event.Path.Count - 1; i >= 0; i--)
{
EventPathItem @struct = @event.Path[i];
/* 1) If struct’s shadow-adjusted target is non-null, then set event’s eventPhase attribute to AT_TARGET. */
if (@struct.shadow_adjusted_target is object)
{
@event.eventPhase = EEventPhase.AT_TARGET;
}
/* 2) Otherwise, set event’s eventPhase attribute to CAPTURING_PHASE. */
else
{
@event.eventPhase = EEventPhase.CAPTURING_PHASE;
}
/* 3) Invoke with struct, event, "capturing", and legacyOutputDidListenersThrowFlag if given. */
EventCommon.invoke(@struct, @event, EEventPhase.CAPTURING_PHASE, legacyOutputDidListenersThrowFlag);
}
/* 14) For each struct in event’s path: */
foreach (EventPathItem @struct in @event.Path)
{
/* 1) If struct’s shadow-adjusted target is non-null, then set event’s eventPhase attribute to AT_TARGET. */
if (@struct.shadow_adjusted_target is object)
{
@event.eventPhase = EEventPhase.AT_TARGET;
}
/* 2) Otherwise: */
else
{
if ([email protected])
{
continue;
}
@event.eventPhase = EEventPhase.BUBBLING_PHASE;
}
EventCommon.invoke(@struct, @event, EEventPhase.BUBBLING_PHASE, legacyOutputDidListenersThrowFlag);
}
}
/* 6) Set event’s eventPhase attribute to NONE. */
@event.eventPhase = EEventPhase.NONE;
/* 7) Set event’s currentTarget attribute to null. */
@event.currentTarget = null;
/* 8) Set event’s path to the empty list. */
@event.Path.Clear();
/* 9) Unset event’s dispatch flag, stop propagation flag, and stop immediate propagation flag. */
@event.Flags &= ~(EEventFlags.Dispatch | EEventFlags.StopPropogation | EEventFlags.StopImmediatePropogation);
/* 10) If clearTargets, then: */
if (clearTargets)
{
@event.target = null;
@event.relatedTarget = null;
@event.TouchTargetList.Clear();
}
/* 11) If activationTarget is non-null, then: */
if (activationTarget is object)
{
/* 1) If event’s canceled flag is unset, then run activationTarget’s activation behavior with event. */
if (0 == (@event.Flags & EEventFlags.Canceled))
{
activationTarget.activation_behaviour(@event);
}
/* 2) Otherwise, if activationTarget has legacy-canceled-activation behavior, then run activationTarget’s legacy-canceled-activation behavior. */
else if (activationTarget.has_legacy_activation_behaviour)
{
activationTarget.legacy_canceled_pre_activation_behaviour();
}
}
/* 12) Return false if event’s canceled flag is set, and true otherwise. */
return(0 == (@event.Flags & EEventFlags.Canceled));
}