private void CaptureEvent(List<IEventTarget> nodes, Event e, List<IEventTarget> avoidNodes)
{
e.eventPhase = EventPhases.CAPTURING_PHASE;
//reverse of the chain make it sorted in order to execute
nodes.Reverse();
BroadcastEvent(e, nodes, avoidNodes);
}
private void BroadcastEventFromNode(INode sender, Event e, List<IEventTarget> avoidTargets)
{
//Build event targets chain
List<IEventTarget> targets = new List<IEventTarget>();
BuildEventTargetsChain(sender, targets);
//Capture Event
CaptureEvent(targets, e, avoidTargets);
//Bubble Event
BubbleEvent(targets, e, avoidTargets);
}
/// <summary>
/// Trigger some javascript event on the object
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <param name="eventName"></param>
public bool FireEvent(ScriptFunction sf, Event e, object scope)
{
object result = sf.Invoke(scope, new object[] {e});
//todo: check whether result is NULL?
return result is bool ? (bool)result : false;
}
private void BroadcastEvent(Event e, List<IEventTarget> nodes, List<IEventTarget> avoidNodes)
{
foreach (IEventTarget node in nodes)
{
if(avoidNodes != null && avoidNodes.Contains(node))
{
continue;//skip nodes which are marked as avoided. Generally nodes which already handled the event are marked as avoided.
}
Dictionary<string, List<IEventRegistration>> events = node.GetEventsCollection();
//process event in current node
if (events.ContainsKey(e.type) && events[e.type].Count > 0)
//if there is at least one listener of this type of event
{
List<IEventRegistration> eventRegistrations = events[e.type];
foreach (IEventRegistration eventRegistration in eventRegistrations)
{
if (eventRegistration.ApplyToPhase == e.eventPhase) //if listener has correct type of eventPahse
{
FireEvent(eventRegistration.Listener, e, node);
}
}
}
}
}
/// <summary>
/// Bubbles event to the document object directly
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <param name="eventName"></param>
public void BubbleEvent(List<IEventTarget> nodes, Event e, List<IEventTarget> avoidNodes)
{
e.eventPhase = EventPhases.BUBBLING_PHASE;
//reverse of the chain make it sorted in order to execute
nodes.Reverse();
BroadcastEvent(e, nodes, avoidNodes);
}
