add mechanism for traits to export the *Inits they can use

OpenRA.Game/GameRules/ActorInfo.cs

@@ -118,5 +118,20 @@ namespace OpenRA
 				.Select( t => t.GetGenericArguments()[ 0 ] )
 				.ToList();
 		}
+
+		public IEnumerable<Pair<string, Type>> GetInitKeys()
+		{
+			var inits = Traits.WithInterface<ITraitInfo>().SelectMany(
+				t => t.GetType().GetInterfaces()
+					.Where(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(UsesInit<>))
+					.Select(i => i.GetGenericArguments()[0])).ToList();
+
+			inits.Add( typeof(OwnerInit) );		/* not exposed by a trait; this is used by the Actor itself */
+
+			return inits.Select(
+				i => Pair.New(
+					i.GetType().Name.Replace( "Init", "" ),
+					i.GetType().GetInterfaces()[0].GetGenericArguments()[0] ) );
+		}
 	}
 }

OpenRA.Game/Map.cs

@@ -102,14 +102,6 @@ namespace OpenRA
 			return map;
 		}
 
-		class Format2ActorReference
-		{
-			public string Id = null;
-			public string Type = null;
-			public int2 Location = int2.Zero;
-			public string Owner = null;
-		}
-
 		void AssertExists(string filename)
 		{
 			using(var s = Container.GetContent(filename))

OpenRA.Game/Server/Server.cs

@@ -46,10 +46,7 @@ namespace OpenRA.Server
 		public Map Map;
 
 		volatile bool shutdown = false;
-		public void Shutdown()
-		{
-			shutdown = true;
-		}
+		public void Shutdown() { shutdown = true; }
 
 		public Server(IPEndPoint endpoint, string[] mods, ServerSettings settings, ModData modData)
 		{

OpenRA.Game/Server/TraitInterfaces.cs

@@ -7,6 +7,7 @@
  * see COPYING.
  */
 #endregion
+
 using System;
 using OpenRA.Network;
 

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -184,6 +184,7 @@ namespace OpenRA.Traits
 	public class TraitInfo<T> : ITraitInfo where T : new() { public virtual object Create(ActorInitializer init) { return new T(); } }
 
 	public interface Requires<T> where T : class { }
+	public interface UsesInit<T> where T : IActorInit { }
 
 	public interface INotifySelection { void SelectionChanged(); }
 	public interface IWorldLoaded { void WorldLoaded(World w); }