public static IEnumerable <TNode> GetNodes <TNode>(this IBidirList <TNode> list, Direction dir) where TNode : class, IBidirListNode <TNode>
{
if (list.Count == 0)
{
return(Enumerable.Empty <TNode>());
}
return(list.GetFirst(dir).GetNodes(dir));
}
public static TNode GetLast <TNode>(this IBidirList <TNode> list, Direction dir, Func <TNode, bool> filter) where TNode : class, IBidirListNode <TNode>
{
TNode node = list.GetLast(dir);
while (node != null && node != list.GetBegin(dir) && !filter(node))
{
node = node.GetPrev(dir);
}
return(node);
}
public static IEnumerable <TNode> GetNodes <TNode>(this IBidirList <TNode> list, TNode first, TNode last, Direction dir) where TNode : class, IBidirListNode <TNode>
{
return(first.GetNodes(last, dir));
}
public static TNode GetPrev <TNode>(this IBidirList <TNode> list, TNode cur, Direction dir, Func <TNode, bool> filter) where TNode : class, IBidirListNode <TNode>
{
return(cur.GetPrev(dir, filter));
}
public static TNode GetLast <TNode>(this IBidirList <TNode> list, Func <TNode, bool> filter) where TNode : class, IBidirListNode <TNode>
{
return(GetLast(list, Direction.LeftToRight, filter));
}