/// <summary>
/// A TextSelection extension method that expand selection.
/// </summary>
/// <param name="selection">
/// The target to act on.
/// </param>
/// <returns>
/// .
/// </returns>
public static WiddenSelectionResult ExpandSelection(this TextSelection selection)
{
EditorPoints ep = selection.GetEditorPoints();
// If nothing is selected, select the closest node.
if (ep.IsEmpty)
{
selection.ResetSelection(ep);
return(selection.SelectNode() ? WiddenSelectionResult.Success : WiddenSelectionResult.NodeSelectError);
}
// If a node or nodes are selected, select the parent.
if (selection.IsNodeSelected() || selection.AreSiblingsSelected())
{
return(selection.SelectParent()
? WiddenSelectionResult.Success
: WiddenSelectionResult.ParentSelectError);
}
return(WiddenSelectionResult.LogicError);
}