int TextImplementor.GetOffsetAtPoint(int x, int y, CoordType coords)
        {
            int rx = 0, ry = 0;

            switch (coords)
            {
            case Atk.CoordType.Screen:
                editor.TranslateCoordinates(editor, x, y, out rx, out ry);
                rx -= editor.TextViewMargin.XOffset;
                break;

            case Atk.CoordType.Window:
                rx = x - editor.TextViewMargin.XOffset;
                ry = y;
                break;
            }
            return(Document.LocationToOffset(editor.TextViewMargin.VisualToDocumentLocation(rx, ry)));
        }