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

		public void DrawCaret (Gdk.Drawable win, Gdk.Rectangle rect)
		{
			if (!this.textEditor.IsInDrag && !(this.caretX >= 0 && (!this.textEditor.IsSomethingSelected || this.textEditor.SelectionRange.Length == 0))) 
				return;
			if (win == null || Settings.Default.CursorBlink && !Caret.IsVisible || !caretBlink)
				return;
			using (Cairo.Context cr = Gdk.CairoHelper.Create (win)) {
				cr.Rectangle (XOffset, 0, textEditor.Allocation.Width - XOffset, textEditor.Allocation.Height);
				cr.Clip ();
				cr.LineWidth = System.Math.Max (1, System.Math.Floor (textEditor.Options.Zoom));
				cr.Antialias = Cairo.Antialias.None;
				var curRect = new Gdk.Rectangle ((int)caretX, (int)caretY, (int)this.charWidth, (int)LineHeight - 1);
				if (curRect != caretRectangle) {
					caretRectangle = curRect;
//					textEditor.TextArea.QueueDrawArea (caretRectangle.X - (int)textEditor.Options.Zoom,
//					               (int)(caretRectangle.Y + (-textEditor.VAdjustment.Value + caretVAdjustmentValue)),
//				                    caretRectangle.Width + (int)textEditor.Options.Zoom,
//					               caretRectangle.Height + 1);
					caretVAdjustmentValue = textEditor.VAdjustment.Value;
				}


				var fgColor = textEditor.ColorStyle.PlainText.Foreground;
//				var bgColor = textEditor.ColorStyle.Default.CairoBackgroundColor;
				var line = Document.GetLine (Caret.Line);
				if (line != null) {
					foreach (var marker in line.Markers) {
						var style = marker as StyleTextLineMarker;
						if (style == null)
							continue;
	//					if (style.IncludedStyles.HasFlag (StyleTextLineMarker.StyleFlag.BackgroundColor))
	//						bgColor = style.BackgroundColor;
						if (style.IncludedStyles.HasFlag (StyleTextLineMarker.StyleFlag.Color))
							fgColor = style.Color;
					}
				}
				/*
				var foreground = ((HslColor)fgColor).ToPixel ();
				var background = ((HslColor)color).ToPixel ();
				var caretColor = (foreground ^ background) & 0xFFFFFF;
				color = HslColor.FromPixel (caretColor);*/
				var color = fgColor;

				switch (Caret.Mode) {
				case CaretMode.Insert:
					cr.DrawLine (color,
					             caretRectangle.X + 0.5, 
					             caretRectangle.Y + 0.5,
					             caretRectangle.X + 0.5,
					             caretRectangle.Y + caretRectangle.Height);
					break;
				case CaretMode.Block:
					cr.SetSourceColor (color);
					cr.Rectangle (caretRectangle.X + 0.5, caretRectangle.Y + 0.5, caretRectangle.Width, caretRectangle.Height);
					cr.Fill ();
					char caretChar = GetCaretChar ();
					if (!char.IsWhiteSpace (caretChar) && caretChar != '\0') {
						using (var layout = textEditor.LayoutCache.RequestLayout ()) {
							layout.FontDescription = textEditor.Options.Font;
							layout.SetText (caretChar.ToString ());
							cr.MoveTo (caretRectangle.X, caretRectangle.Y);
							cr.SetSourceColor (textEditor.ColorStyle.PlainText.Background);
							cr.ShowLayout (layout);
						}
					}
					break;
				case CaretMode.Underscore:
					cr.DrawLine (color,
					             caretRectangle.X + 0.5, 
					             caretRectangle.Y + caretRectangle.Height + 0.5,
					             caretRectangle.X + caretRectangle.Width,
					             caretRectangle.Y + caretRectangle.Height + 0.5);
					break;
				}
			}
		}