public ComEventsMethod AddMethod(int dispid)
{
ComEventsMethod method = new ComEventsMethod(dispid);
_methods = ComEventsMethod.Add(_methods, method);
return(method);
}
public static ComEventsMethod?Remove(ComEventsMethod methods, ComEventsMethod method)
{
Debug.Assert(methods != null, "removing method from empty methods collection");
Debug.Assert(method != null, "specify method is null");
if (methods == method)
{
return(methods._next);
}
else
{
ComEventsMethod?current = methods;
while (current != null && current._next != method)
{
current = current._next;
}
if (current != null)
{
current._next = method._next;
}
return(methods);
}
}
public void AddHandler(int dispid, object func)
{
ComEventsMethod method = FindMethod(dispid);
if (method == null)
{
method = AddMethod(dispid);
}
if (func is Delegate d)
{
method.AddDelegate(d);
}
else
{
method.AddDelegate(new SplatCallSite.InvokeDelegate(new SplatCallSite(func).Invoke), wrapArgs: true);
}
}
public void RemoveHandler(int dispid, object func)
{
ComEventsMethod sinkEntry = FindMethod(dispid);
if (sinkEntry == null)
{
return;
}
if (func is Delegate d)
{
sinkEntry.RemoveDelegate(d);
}
else
{
// Remove the delegate from multicast delegate chain.
// We will need to find the delegate that corresponds
// to the func handler we want to remove. This will be
// easy since we Target property of the delegate object
// is a ComEventCallContext object.
sinkEntry.RemoveDelegates(d => d.Target is SplatCallSite callContext && callContext._callable.Equals(func));
}
// If the delegates chain is empty - we can remove
// corresponding ComEvenSinkEntry
if (sinkEntry.Empty)
{
RemoveMethod(sinkEntry);
}
if (_methods == null || _methods.Empty)
{
Unadvise();
_iidSourceItf = Guid.Empty;
}
}
public static ComEventsMethod Add(ComEventsMethod?methods, ComEventsMethod method)
{
method._next = methods;
return(method);
}
public ComEventsMethod?FindMethod(int dispid)
{
return(ComEventsMethod.Find(_methods, dispid));
}
public ComEventsMethod?RemoveMethod(ComEventsMethod method)
{
_methods = ComEventsMethod.Remove(_methods !, method);
return(_methods);
}