internal static FlattenerNode GetNodeByVisibleIndex(FlattenerNode root, int index)
{
root.TotalCount();
var flattenerNode = root;
while (true)
{
for (;
flattenerNode._left == null || index >= flattenerNode._left._totalCount;
flattenerNode = flattenerNode._right)
{
if (flattenerNode._left != null)
{
index -= flattenerNode._left._totalCount;
}
if (flattenerNode.IsVisible)
{
if (index == 0)
{
return(flattenerNode);
}
--index;
}
}
flattenerNode = flattenerNode._left;
}
}
private int TotalCount()
{
if (_totalCount > 0)
{
return(_totalCount);
}
var num = IsVisible ? 1 : 0;
if (_left != null)
{
num += _left.TotalCount();
}
if (_right != null)
{
num += _right.TotalCount();
}
_totalCount = num;
return(_totalCount);
}
