internal static DocumentMapNode CreateNode(IDocumentMap docMap)
        {
            if (docMap == null)
            {
                return(null);
            }
            Stack <NodeStackEntry>  stack     = new Stack <NodeStackEntry>();
            List <DocumentMapNode>  workspace = new List <DocumentMapNode>();
            OnDemandDocumentMapNode onDemandDocumentMapNode = null;
            NodeStackEntry          item = default(NodeStackEntry);

            while (docMap.MoveNext())
            {
                onDemandDocumentMapNode = docMap.Current;
                item.Node  = FromOnDemandNode(onDemandDocumentMapNode);
                item.Level = onDemandDocumentMapNode.Level;
                while (stack.Count > 0 && onDemandDocumentMapNode.Level < stack.Peek().Level)
                {
                    CollapseTopLevel(stack, workspace);
                }
                stack.Push(item);
            }
            while (stack.Count > 1)
            {
                CollapseTopLevel(stack, workspace);
            }
            return(stack.Pop().Node);
        }
 private static DocumentMapNode FromOnDemandNode(OnDemandDocumentMapNode node)
 {
     return(new DocumentMapNode(node.Label, node.Id, null));
 }