debug (timing) spam, and perf fixed on SupportPower

Build timing (un)hacked by chrisf

OpenRA.Game/Traits/Player/TechTreeCache.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRA.GameRules;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Traits
+{
+	class TechTreeCacheInfo : TraitInfo<TechTreeCache> { }
+
+	class TechTreeCache : ITick
+	{
+		class Watcher
+		{
+			public readonly List<ActorInfo> prerequisites;
+			public readonly ITechTreeElement watcher;
+			bool hasPrerequisites;
+
+			public Watcher(List<ActorInfo> prerequisites, ITechTreeElement watcher)
+			{
+				this.prerequisites = prerequisites;
+				this.watcher = watcher;
+				this.hasPrerequisites = false;
+			}
+
+			public void Tick( Player owner, Cache<string, List<Actor>> buildings )
+			{
+				var effectivePrereq = prerequisites.Where( a => a.Traits.Get<BuildableInfo>().Owner.Contains( owner.Country.Race ) );
+				var nowHasPrerequisites = effectivePrereq.Any() &&
+					effectivePrereq.All( a => buildings[ a.Name ].Any( b => !b.traits.Get<Building>().Disabled ) );
+
+				if( nowHasPrerequisites && !hasPrerequisites )
+					watcher.Available();
+
+				if( !nowHasPrerequisites && hasPrerequisites )
+					watcher.Unavailable();
+
+				hasPrerequisites = nowHasPrerequisites;
+			}
+		}
+
+		readonly List<Watcher> watchers = new List<Watcher>();
+
+		public void Tick( Actor self )
+		{
+			var buildings = Rules.TechTree.GatherBuildings( self.Owner );
+
+			foreach( var w in watchers )
+				w.Tick( self.Owner, buildings );
+		}
+
+		public void Add( List<ActorInfo> prerequisites, ITechTreeElement tte )
+		{
+			watchers.Add( new Watcher( prerequisites, tte ) );
+		}
+
+		public void Remove( ITechTreeElement tte )
+		{
+			watchers.RemoveAll( x => x.watcher == tte );
+		}
+	}
+
+	interface ITechTreeElement
+	{
+		void Available();
+		void Unavailable();
+	}
+}