/// <summary>
/// A TextSelection extension method that select parent.
/// </summary>
/// <param name="selection">
/// The target to act on.
/// </param>
/// <returns>
/// true if it succeeds, otherwise false.
/// </returns>
public static bool SelectParent(this TextSelection selection)
{
EditorPoints ep = selection.GetEditorPoints();
XamlNode[] nodes = _rootNode.GetSelectedNodes(ep);
if (nodes == null || nodes == null)
{
return(false);
}
XamlNode parent = nodes[0].Parent;
selection.SetSelection(parent.BottomPoint + 1, parent.TopPoint + 1);
return(true);
}
/// <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);
}
private static EditorPoints GetEditorPoints(TextSelection sel, bool handleExceptions = true)
{
EditorPoints ep = sel.GetEditorPoints();
try
{
if (_documentText == ep.DocumentText)
{
return(ep);
}
_documentText = ep.DocumentText;
_rootNode = new XamlNode(_documentText);
return(ep);
}
catch
{
ep.RestoreSelectedText(sel);
return(EditorPoints.GetInvalidEditorPoints());
}
}