Reorganise FileFormats

OpenRA.FileFormats/Primitives/Set.cs

@@ -0,0 +1,76 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace OpenRA.Collections
+{
+	public class Set<T> : IEnumerable<T>
+	{
+		Dictionary<T, bool> data = new Dictionary<T, bool>();
+
+		public void Add( T obj )
+		{
+			data.Add( obj, false );
+			if( OnAdd != null )
+				OnAdd( obj );
+		}
+
+		public void Remove( T obj )
+		{
+			data.Remove( obj );
+			if( OnRemove != null )
+				OnRemove( obj );
+		}
+
+		public event Action<T> OnAdd;
+		public event Action<T> OnRemove;
+
+		public IEnumerator<T> GetEnumerator()
+		{
+			return data.Keys.GetEnumerator();
+		}
+
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
+	}
+
+	public class CachedView<T,U> : Set<U>
+	{
+		public CachedView( Set<T> set, Func<T, bool> include, Func<T, U> store )
+			: this( set, include, x => new[] { store( x ) } )
+		{
+		}
+
+		public CachedView( Set<T> set, Func<T,bool> include, Func<T,IEnumerable<U>> store )
+		{
+			foreach( var t in set )
+				if( include( t ) )
+					store( t ).Do( x => Add( x ) );
+
+			set.OnAdd += obj => { if( include( obj ) ) store( obj ).Do( x => Add( x ) ); };
+			set.OnRemove += obj => { if( include( obj ) ) store( obj ).Do( x => Remove( x ) ); };
+		}
+	}
+}