/// <summary>
/// A TextSelection extension method that trims the given target.
/// </summary>
/// <param name="target">
/// The target to act on.
/// </param>
/// <param name="topActive">
/// Determines the active text point.
/// </param>
public static void Trim(this TextSelection target, bool?topActive = null)
{
if (topActive == null)
{
topActive = target.IsActiveEndGreater == false;
}
var text = target.Text.Replace(Environment.NewLine, "\n");
var match = Regex.Match(text, @"\A\s*");
if (match.Success == false)
{
return;
}
var len = match.Length;
var topPoint = target.TopPoint.AbsoluteCharOffset + len;
var bottomPoint = topPoint + text.Trim().Length;
if ((bool)topActive)
{
target.SetSelection(bottomPoint, topPoint);
}
else
{
target.SetSelection(topPoint, bottomPoint);
}
}
/// <summary>
/// A TextSelection extension method that selects one or more nodes
/// contained by one parent node.
/// </summary>
/// <param name="selection">
/// The target to act on.
/// </param>
/// <returns>
/// true if it succeeds, otherwise false.
/// </returns>
public static bool SelectNodes(this TextSelection selection)
{
logger.Trace("Entered SelectNodes()");
EditorPoints ep = GetEditorPoints(selection);
// Find the nodes that are within or that contain the ends of the selection.
Tuple <XamlNode, XamlNode> firstAndLast =
_rootNode.GetFirstLastNodesBetweenPoints(ep.TopPoint - 1,
ep.BottomPoint - 1);
// Null is returned if one end of the selection is outside the root node.
if (firstAndLast.Item1 == null || firstAndLast.Item2 == null)
{
// Select the root node.
selection.SelectAll();
selection.Trim();
return(true);
}
// Select the the text for the nodes found above.
selection.SetSelection(firstAndLast.Item2.BottomPoint + 1,
firstAndLast.Item1.TopPoint + 1);
return(true);
}
/// <summary>
/// A TextSelection extension method that resets the selection.
/// </summary>
/// <param name="target">
/// The target to act on.
/// </param>
/// <param name="originalPoints">
/// The original points.
/// </param>
/// <returns>
/// true if it succeeds, otherwise false.
/// </returns>
public static bool ResetSelection(this TextSelection target, EditorPoints originalPoints)
{
target.SetSelection(originalPoints.AnchorPoint, originalPoints.ActivePoint);
// Usually called when a process fails. This makes it easier to
// reply with false while reseting the seleciton.
return(false);
}
/// <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 selects a single node.
/// </summary>
/// <param name="selection">
/// The target to act on.
/// </param>
/// <returns>
/// true if it succeeds, otherwise false.
/// </returns>
public static bool SelectNode(this TextSelection selection)
{
// Works only when the selected text is empty.
if (!selection.IsEmpty)
{
return(false);
}
// This has to be done here primarily to prime the data
// needed by called methods. Othwerwise we could just
// reference the offsets directly.
EditorPoints ep = GetEditorPoints(selection);
XamlNode node = _rootNode.GetNodeWithOffset(ep.ActivePoint - 1);
if (node == null)
{
return(false);
}
selection.SetSelection(node.BottomPoint + 1, node.TopPoint + 1);
return(true);
}
