Mono.TextEditor.TextViewMargin.DrawRectangleWithRuler C# (CSharp) Method

		public void DrawRectangleWithRuler (Cairo.Context cr, double x, Cairo.Rectangle area, Cairo.Color color, bool drawDefaultBackground)
		{
			bool isDefaultColor = color.R == defaultBgColor.R && color.G == defaultBgColor.G && color.B == defaultBgColor.B;
			if (isDefaultColor && !drawDefaultBackground)
				return;
			cr.SetSourceColor (color);
			var left = (int)(area.X);
			var width = (int)area.Width + 1;
			if (textEditor.GetTextEditorData ().ShowRuler) {
				var right = left + width;

				var divider = (int) (System.Math.Max (left, System.Math.Min (x + TextStartPosition + rulerX, right)));
				if (divider < right) {
					var beforeDividerWidth = divider - left;
					if (beforeDividerWidth > 0) {
						cr.Rectangle (left, area.Y, beforeDividerWidth, area.Height);
						cr.Fill ();
					}
					cr.Rectangle (divider, area.Y, right - divider, area.Height);
					cr.SetSourceColor (color);
					cr.Fill ();

					if (beforeDividerWidth > 0) {
						cr.DrawLine (
							ColorStyle.Ruler.Color,
							divider + 0.5, area.Y,
							divider + 0.5, area.Y + area.Height);
					}
					return;
				}
			}

			cr.Rectangle (left, area.Y, System.Math.Ceiling (area.Width), area.Height);
			cr.Fill ();
		}