Introduce MapCache and MapPreview for improved UI map previews.

OpenRA.Game/MapPreview.cs

@@ -0,0 +1,91 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using OpenRA.FileFormats;
+using OpenRA.Graphics;
+using OpenRA.Widgets;
+
+namespace OpenRA
+{
+	public enum MapStatus { Available, Unavailable }
+	public class MapPreview
+	{
+		static readonly List<CPos> NoSpawns = new List<CPos>();
+
+		public readonly string Uid;
+		public string Title { get; private set; }
+		public string Type { get; private set; }
+		public string Author { get; private set; }
+		public int PlayerCount { get; private set; }
+		public List<CPos> SpawnPoints { get; private set; }
+		public Rectangle Bounds { get; private set; }
+		public Map Map { get; private set; }
+		public MapStatus Status { get; private set; }
+
+		Sprite minimap;
+		bool generatingMinimap;
+		public Sprite Minimap
+		{
+			get
+			{
+				if (minimap != null)
+					return minimap;
+
+				if (!generatingMinimap && Status == MapStatus.Available)
+				{
+					generatingMinimap = true;
+					cache.CacheMinimap(this);
+				}
+
+				return null;
+			}
+
+			set
+			{
+				minimap = value;
+				generatingMinimap = false;
+			}
+		}
+
+		MapCache cache;
+		public MapPreview(string uid, MapCache cache)
+		{
+			this.cache = cache;
+			Uid = uid;
+			Title = "Unknown Map";
+			Type = "Unknown";
+			Author = "Unknown Author";
+			PlayerCount = 0;
+			Bounds = Rectangle.Empty;
+			SpawnPoints = NoSpawns;
+			Status = MapStatus.Unavailable;
+		}
+
+		public void UpdateFromMap(Map m)
+		{
+			Map = m;
+			Title = m.Title;
+			Type = m.Type;
+			Type = m.Type;
+			Author = m.Author;
+			PlayerCount = m.Players.Count(x => x.Value.Playable);
+			Bounds = m.Bounds;
+			SpawnPoints = m.GetSpawnPoints().ToList();
+			Status = MapStatus.Available;
+		}
+	}
+}