Add Support of Types for GivesBuildableArea

OpenRA.Mods.Common/Traits/Buildings/RequiresBuildableArea.cs

@@ -0,0 +1,29 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("This actor requires another actor with 'GivesBuildableArea' trait around to be placed.")]
+	public class RequiresBuildableAreaInfo : TraitInfo<RequiresBuildableArea>, Requires<BuildingInfo>
+	{
+		[FieldLoader.Require]
+		[Desc("Types of buildable are this actor requires.")]
+		public readonly HashSet<string> AreaTypes = new HashSet<string>();
+
+		[Desc("Maximum range from the actor with 'GivesBuildableArea' this can be placed at.")]
+		public readonly int Adjacent = 2;
+	}
+
+	public class RequiresBuildableArea { }
+}