public override void Draw (TextEditor editor, Cairo.Context cr, Pango.Layout layout, bool selected, int startOffset, int endOffset, double y, double startXPos, double endXPos)
			{
				var line = editor.GetLine (loc.Line);
				var x = editor.ColumnToX (line, loc.Column) - editor.HAdjustment.Value + editor.TextViewMargin.XOffset + editor.TextViewMargin.TextStartPosition;

				cr.Rectangle (Math.Floor (x) + 0.5, Math.Floor (y) + 0.5 + (line == editor.GetLineByOffset (startOffset) ? editor.LineHeight - tagMarkerHeight - 1 : 0), tagMarkerWidth * cr.LineWidth, tagMarkerHeight * cr.LineWidth);

				if (HslColor.Brightness (editor.ColorStyle.PlainText.Background) < 0.5) {
					cr.SetSourceRGBA (0.8, 0.8, 1, 0.9);
				} else {
					cr.SetSourceRGBA (0.2, 0.2, 1, 0.9);
				}
				cr.Stroke ();
			}