// it is caller's responsibility to call this method under lock(rcw)
public ComEventsSink AddSink(ref Guid iid)
{
ComEventsSink sink = new ComEventsSink(_rcw, iid);
_sinks = ComEventsSink.Add(_sinks, sink);
return(_sinks);
}
/// <summary>
/// Adds a handler to an event.
/// </summary>
/// <param name="handler">The handler to be added.</param>
/// <returns>The original event with handler added.</returns>
private object InPlaceAdd(object handler)
{
Requires.NotNull(handler, nameof(handler));
VerifyHandler(handler);
ComEventsSink comEventSink = ComEventsSink.FromRuntimeCallableWrapper(_rcw, _sourceIid, true);
comEventSink.AddHandler(_dispid, handler);
return(this);
}
/// <summary>
/// Removes handler from the event.
/// </summary>
/// <param name="handler">The handler to be removed.</param>
/// <returns>The original event with handler removed.</returns>
private object InPlaceSubtract(object handler)
{
Requires.NotNull(handler, nameof(handler));
VerifyHandler(handler);
ComEventsSink comEventSink = ComEventsSink.FromRuntimeCallableWrapper(_rcw, _sourceIid, false);
comEventSink?.RemoveHandler(_dispid, handler);
return(this);
}
/// <summary>
/// Adds a delegate to the invocation list of events originating from the COM object.
/// </summary>
/// <param name="rcw">COM object firing the events the caller would like to respond to</param>
/// <param name="iid">identifier of the source interface used by COM object to fire events</param>
/// <param name="dispid">dispatch identifier of the method on the source interface</param>
/// <param name="d">delegate to invoke when specified COM event is fired</param>
public static void Combine(object rcw, Guid iid, int dispid, Delegate d)
{
lock (rcw)
{
ComEventsInfo eventsInfo = ComEventsInfo.FromObject(rcw);
ComEventsSink sink = eventsInfo.FindSink(ref iid) ?? eventsInfo.AddSink(ref iid);
ComEventsMethod method = sink.FindMethod(dispid) ?? sink.AddMethod(dispid);
method.AddDelegate(d);
}
}
// it is caller's responsibility to call this method under lock(rcw)
internal ComEventsSink RemoveSink(ComEventsSink sink)
{
_sinks = ComEventsSink.Remove(_sinks !, sink);
return(_sinks !);
}
public ComEventsSink?FindSink(ref Guid iid)
{
return(ComEventsSink.Find(_sinks, ref iid));
}
