public void Swap(DLinkNode node)
{
DLinkNode tempNode = new DLinkNode();
if (this.Prev == node || this.Next == node)
{
DLinkNode frontNode, backNode;
if (this.Next == node)
{
frontNode = this;
backNode = node;
}
else
{
frontNode = node;
backNode = this;
}
if (backNode.Next != null)
{
tempNode.Next = backNode.Next;
} //else nothing
if (frontNode.Prev != null)
{
frontNode.Prev.Next = backNode;
}
//if and else both
backNode.Prev = frontNode.Prev;
backNode.Next = frontNode;
frontNode.Prev = backNode;
if (tempNode.Next != null)
{
tempNode.Next.Prev = frontNode;
}
//if and else both
frontNode.Next = tempNode.Next;
}
else
{
if (node.Prev != null)
{
tempNode.Prev = node.Prev;
} //else nothing
if (node.Next != null)
{
tempNode.Next = node.Next;
} //else nothing
if (this.Prev != null)
{
this.Prev.Next = node;
}
//if and else both
node.Prev = this.Prev;
if (this.Next != null)
{
this.Next.Prev = node;
}
//if and else both
node.Next = this.Next;
if (tempNode.Prev != null)
{
tempNode.Prev.Next = this;
}
//if and else both
this.Prev = tempNode.Prev;
if (tempNode.Next != null)
{
tempNode.Next.Prev = this;
}
//if and else both
this.Next = tempNode.Next;
}
}
public Enumerator(DLinkNode dLinkNode)
{
localDLN = dLinkNode;
Current = dLinkNode;
isFirst = true;
}