public void InOrder(RedBlackNode node)
{
if (node != null)
{
InOrder(node.leftChild);
// If the node has no parent it is the root
if (node.parent == null)
{
Console.WriteLine(" | " + node.key.ToString() + " - " + node.color + " | - Root");
}
else
{
Console.WriteLine(" | " + node.key.ToString() + " - " + node.color);
}
if (node.rightChild == null && node.leftChild == null)
{
numOfLeafs++;
}
InOrder(node.rightChild);
}
}
private void Rebalance(RedBlackNode node)
{
if (node != null)
{
// Always make sure the root is black. Brute force assigning works here because
// this function does not act as if the local parameter is the root like the rotation functions do
if (root.Red)
{
root.SetColor("BLACK");
}
if (node.Red)
{
if (node.parent.Red)
{
if (node.parent.rightChild != null && node == node.parent.rightChild)
{
if (node.parent.parent.rightChild != null && node.parent == node.parent.parent.rightChild)
{
if (node.parent.parent.leftChild == null || node.parent.parent.leftChild.Black)
{
LeftRotation(node.parent.parent);
}
else if (node.parent.parent.leftChild.Red)
{
ColorFlip(node);
}
}
else if (node.parent.parent.leftChild != null && node.parent == node.parent.parent.leftChild)
{
if (node.parent.parent.rightChild == null || node.parent.parent.rightChild.Black)
{
LeftRightRotation(node.parent.parent);
}
else if (node.parent.parent.rightChild.Red)
{
ColorFlip(node);
}
}
}
else if (node.parent.leftChild != null && node == node.parent.leftChild)
{
if (node.parent.parent.leftChild != null && node.parent == node.parent.parent.leftChild)
{
if (node.parent.parent.rightChild == null || node.parent.parent.rightChild.Black)
{
RightRotation(node.parent.parent);
}
else if (node.parent.parent.rightChild.Red)
{
ColorFlip(node);
}
}
else if (node.parent.parent.rightChild != null && node.parent == node.parent.parent.rightChild)
{
if (node.parent.parent.leftChild == null || node.parent.parent.leftChild.Black)
{
RightLeftRotation(node.parent.parent);
}
else if (node.parent.parent.leftChild.Red)
{
ColorFlip(node);
}
}
}
}
}
}
}
