private static WidgetNode LinkWidgetNodeToList(WidgetNode list, WidgetNode node)
{
if (list == null || WidgetNode.Before(node, list))
{
if (list != null)
{
list.Prev = node;
}
node.Next = list;
return(node);
}
else
{
var n = list;
for (; n.Next != null && WidgetNode.Before(n.Next, node); n = n.Next)
{
;
}
node.Prev = n;
node.Next = n.Next;
if (n.Next != null)
{
n.Next.Prev = node;
}
n.Next = node;
return(list);
}
}
private static WidgetNode AdjustWidgetNodePosInList(WidgetNode list, WidgetNode node)
{
if ((node.Prev != null && WidgetNode.Before(node, node.Prev)) ||
(node.Next != null && WidgetNode.Before(node.Next, node)))
{
list = UnlinkWidgetNodeFromList(list, node);
list = LinkWidgetNodeToList(list, node);
}
return(list);
}