private void Link([CanBeNull] NodeRow parentNodeRow, [CanBeNull] NodeRow previousSiblingRow, [CanBeNull] NodeRow nextSiblingRow)
{
using (this.GetScope())
{
Unlink();
ParentNodeRow = parentNodeRow;
if (parentNodeRow == null)
{
RootControlRow = Table.DataSet.ControlRow;
}
PreviousSiblingRow = previousSiblingRow;
if (nextSiblingRow != null)
{
nextSiblingRow.PreviousSiblingRow = this;
}
ControlRow = Table.DataSet.ControlRow;
}
}
public void SetAs(NodeTargetMode mode, [CanBeNull] NodeRow target)
{
using (this.GetScope())
{
if (target == null)
{
var currentControlRow = Table.DataSet.ControlRow;
var firstRootNode = Table.DataSet.NodesTable.FirstOrDefault(n => n.ParentNodeRow == null && n.ControlRow == currentControlRow)?.FirstSibling;
if (mode == NodeTargetMode.FirstChild)
{
Link(null, null, firstRootNode);
}
else
{
Link(null, firstRootNode?.LastSibling, null);
}
}
else
{
switch (mode)
{
case NodeTargetMode.LastChild:
Link(target, target.ChildNodeRows.FirstOrDefault()?.LastSibling, null);
break;
case NodeTargetMode.FirstChild:
Link(target, null, target.ChildNodeRows.FirstOrDefault()?.FirstSibling);
break;
case NodeTargetMode.PreviousSibling:
Link(target.ParentNodeRow, target.PreviousSiblingRow, target);
break;
case NodeTargetMode.NextSibling:
Link(target.ParentNodeRow, target, target.NextSiblingRow);
break;
default:
throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
}
}
}
}