refactor Targetable into Targetable{Unit,Building} and ITargetable

OpenRA.Mods.RA/TargetableUnit.cs

@@ -0,0 +1,41 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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 LICENSE.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	public class TargetableUnitInfo : ITraitInfo
+	{
+		public readonly string[] TargetTypes = { };
+		public virtual object Create( ActorInitializer init ) { return new TargetableUnit<TargetableUnitInfo>( this ); }
+	}
+
+	public class TargetableUnit<Info> : ITargetable
+		where Info : TargetableUnitInfo
+	{
+		protected readonly Info info;
+		public TargetableUnit( Info info )
+		{
+			this.info = info;
+		}
+
+		public virtual string[] TargetTypes { get { return info.TargetTypes; } }
+
+		public virtual IEnumerable<int2> TargetableSquares( Actor self )
+		{
+			yield return Util.CellContaining( self.CenterLocation );
+		}
+	}
+}