/// <summary>
/// Removes a normal delegate from this weak multicast delegate
/// </summary>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new weak multicast delegate</returns>
private WeakMulticastDelegate Remove(Delegate realDelegate)
{
if (Equals(realDelegate))
{
return(_prev);
}
WeakMulticastDelegate current = _prev;
WeakMulticastDelegate last = this;
while (current != null)
{
if (current.Equals(realDelegate))
{
last._prev = current._prev;
current._prev = null;
break;
}
last = current;
current = current._prev;
}
return(this);
}
/// <summary>
/// Combines this weak multicast delegate with a normal delegate
/// Makes sure the delegate target has not been added yet
/// </summary>
/// <param name="realDelegate">the real delegate</param>
/// <returns>the new weak multicast delegate</returns>
private WeakMulticastDelegate CombineUnique(Delegate realDelegate)
{
bool found = Equals(realDelegate);
if (!found && _prev != null)
{
WeakMulticastDelegate curNode = _prev;
while (!found && curNode != null)
{
if (curNode.Equals(realDelegate))
{
found = true;
}
curNode = curNode._prev;
}
}
return(found ? this : Combine(realDelegate));
}