public static Node GetNextNode(Node startingNode, int searchOffset)
{
if (searchOffset == 0)
{
return(startingNode);
}
if (searchOffset > 0)
{
ForwardNodeEnumerator iterator = new ForwardNodeEnumerator(startingNode, true);
while (searchOffset-- >= 0 && iterator.MoveNext())
{
;
}
return(iterator.Current);
}
if (searchOffset < 0)
{
ReverseNodeEnumerator iterator = new ReverseNodeEnumerator(startingNode, true);
while (searchOffset++ <= 0 && iterator.MoveNext())
{
;
}
return(iterator.Current);
}
return(null);
}
public static IEnumerable ReverseNodeIterator(Node firstNode, Node lastNode, bool mustBeVisible)
{
bool m_done = false;
ReverseNodeEnumerator iterator = new ReverseNodeEnumerator(firstNode, mustBeVisible);
while (iterator.MoveNext())
{
if (m_done)
break;
if (iterator.Current == lastNode)
m_done = true;
yield return iterator.Current;
}
}
