/// <summary>
/// 在node之前插入当前节点
/// </summary>
/// <param name="node"></param>
public void InsertBefor(DoubleLinked node)
{
this.Next = node;
if (node.Previous != null)
{
this.Previous = node.Previous;
this.Previous.Next = this;
}
node.Previous = this;
}
/// <summary>
/// 在node之后插入当前节点
/// </summary>
/// <param name="node"></param>
public void InsertAfter(DoubleLinked node)
{
this.Previous = node;
if (node.Next != null)
{
this.Next = node.Next;
this.Next.Previous = this;
}
else
{
//nothing
}
node.Next = this;
}
/// <summary>
/// 将当前节点和swapped节点交换
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
public void Swap(DoubleLinked swapped)
{
if (this == swapped)
{
throw new Exception("无法用节点自己与自己调换");
}
if (this.IsHead && this.Next == swapped)
{
this.Previous = swapped;
this.Next = null;
swapped.Next = this;
swapped.Previous = null;
return;
}
if (this.IsTail && this.Previous == swapped)
{
this.Next = swapped;
this.Previous = null;
swapped.Previous = this;
swapped.Next = null;
return;
}
DoubleLinked thisP = this.Previous;
DoubleLinked thisN = this.Next;
DoubleLinked swappedP = swapped.Previous;
DoubleLinked swappedN = swapped.Next;
this.Delet();
this.InsertAfter(swapped);
swapped.Delet();
if (thisP == null)
{
swapped.InsertBefor(thisN);
}
else if (this.Next == swapped)
{
swapped.InsertBefor(this);
}
else
{
swapped.InsertAfter(thisP);
}
//if (this.IsHead && swapped.IsTail)
//{
// DoubleLinked thisN = this.Next;
// DoubleLinked swappedP = swapped.Previous;
// this.Previous = swappedP;
// swappedP.Next = this;
// this.Next = null;
// swapped.Next = thisN;
// thisN.Previous = swapped;
// swapped.Previous = null;
// return;
//}
//if (this.IsTail && swapped.IsHead)
//{
// DoubleLinked thisNP = this.Previous;
// DoubleLinked swappedN = swapped.Next;
// this.Next = swappedN;
// swappedN.Previous = this;
// this.Previous = null;
// swapped.Previous = thisNP;
// thisNP.Next = swapped;
// swapped.Next = null;
// return;
//}
//if (!this.IsHead && !this.IsTail && !swapped.IsTail && !swapped.IsHead)
//{
// DoubleLinked thisP = this.Previous;
// DoubleLinked thisN = this.Next;
// DoubleLinked swappedP = swapped.Previous;
// DoubleLinked swappedN = swapped.Next;
// this.Next = swappedN;
// this.Previous = swappedP;
// swappedN.Previous = this;
// swappedP.Next = this;
// swapped.Next = thisN;
// swapped.Previous = thisP;
// thisN.Previous = swapped;
// thisP.Next = swapped;
//}
}