/// <summary>
/// Add the given Link into the list
/// </summary>
/// <param name="Link">The Link to add to the list</param>
/// <param name="index">The index at which to insert this entity. Leave -1 to push to the end of the list</param>
/// <exception cref="ArgumentException">The Link already has a parent list</exception>
public void Add(GDDisplayLinkedListLink Link, int index = -1)
{
if (Link.ParentList != null)
{
throw new Exception("Link was already in a list");
}
if (index > size)
{
throw new ArgumentException("Index is out of length of the list", "index");
}
Link.ParentList = this;
// Case: List is empty, set the link as the whole list
if (List == null)
{
List = Link;
Last = Link;
}
else
{
GDDisplayLinkedListLink link = null;
if (index > 0 && index < size)
{
link = List.GetNextLink(index);
}
if (link != null)
{
if (link != Last)
{
link.Next.Previous = Link;
}
else
{
Last = Link;
}
Link.Next = link.Next;
Link.Previous = link;
link.Next = Link;
}
else if (index == 0)
{
List.Previous = Link;
Link.Next = List;
List = Link;
}
else
{
link = Last;
Last = Link;
Link.Next = link.Next;
Link.Previous = link;
link.Next = Link;
}
}
size++;
}
