Draw the game border

Serpentina/UniverseControl.cs

@@ -1,6 +1,8 @@
 using System;
 using CE;
 using CE.Console.Controls;
+using CE.Console;
+using CE.Color;
 
 namespace Serpentina
 {
@@ -15,12 +17,14 @@ public class UniverseControl : Control
 		internal SnakeCollection _snakes;
 		internal readonly Size _fieldSize;
 		internal ConsoleColor _backgroundColor = ConsoleColor.Black;
+		FullColorInfo _edgeColor;
 
 		[Newtonsoft.Json.JsonConstructor]
 		public UniverseControl ()
 		{
 			_snakes = new SnakeCollection ();
 			_fieldSize = new Size (X_SIZE, Y_SIZE);
+			_edgeColor = new FullColorInfo (ConsoleColor.White, _backgroundColor);
 		}
 
 		/// Pre iteration cycle setup.
@@ -44,8 +48,26 @@ public override void DoDraw ()
 			Section.Clear (BackgroundColor);
 			foreach (var snake in _snakes)
 				snake.Draw (this);
+
+			DrawBorder (Section, _edgeColor);
 		}
 
+		static void DrawBorder (BufferSection section, FullColorInfo color)
+		{
+			var area = section.GetArea ();
+			var top = '/' + new string ('=', area.Size.Width - 2) + '\\';
+			section.CursorLocation = Point.Zero;
+			section.Write (top);
+			for (int i = 1; i <= area.Size.Height - 2; i++)
+			{
+				section.CursorLocation = new Point (area.Left, i);
+				section.Write ("|");
+				section.CursorLocation = new Point (area.Right, i);
+				section.Write ("|");
+			}
+			var bot = '\\' + new string ('=', area.Size.Width - 2) + '/';
+			section.Write (bot);
+		}
 		/// Request the optimal size for this control.
 		protected override Size RequestSize ()
 		{