public override bool TransposeLine()
        {
            if (TextView.Selection.IsEmpty)
            {
                TextPoint caretPoint = CaretPoint;
                double    oldLeft    = AdvancedCaret.Left;

                if (!caretPoint.TransposeLine())
                {
                    return(false);
                }

                AdvancedCaret.MoveTo(caretPoint.AdvancedTextPoint, PositionAffinity.Successor, false);
                AdvancedCaret.EnsureVisible();

                ITextViewLine newLine = AdvancedTextViewLine;
                AdvancedCaret.MoveTo(newLine, oldLeft);
                AdvancedCaret.EnsureVisible();
            }
            return(true);
        }
 public override bool TransposeLine()
 {
     return(_bufferPoint.TransposeLine());
 }