Everything is now OpenRA, not OpenRa

OpenRA.Game/Selection.cs

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+#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.Collections.Generic;
+using System.Linq;
+using OpenRA.FileFormats;
+using OpenRA.Traits;
+
+namespace OpenRA
+{
+	public class Selection
+	{
+		List<Actor> actors = new List<Actor>();
+
+		public void Combine(World world, IEnumerable<Actor> newSelection, bool isCombine, bool isClick)
+		{
+			var oldSelection = actors.AsEnumerable();
+
+			if (isClick)
+			{
+				var adjNewSelection = newSelection.Take(1);	/* todo: select BEST, not FIRST */
+				actors = (isCombine ? oldSelection.SymmetricDifference(adjNewSelection) : adjNewSelection).ToList();
+			}
+			else
+				actors = (isCombine ? oldSelection.Union(newSelection) : newSelection).ToList();
+
+			var voicedUnit = actors.FirstOrDefault(a => a.traits.Contains<Unit>() && a.Owner == world.LocalPlayer);
+			Sound.PlayVoice("Select", voicedUnit);
+
+			foreach (var ns in world.WorldActor.traits.WithInterface<INotifySelection>())
+				ns.SelectionChanged();
+		}
+
+		public IEnumerable<Actor> Actors { get { return actors; } }
+		public void Clear() { actors = new List<Actor>(); }
+
+		public void Tick(World world)
+		{
+			actors.RemoveAll(a => !a.IsInWorld);
+		}
+
+		Cache<int, List<Actor>> controlGroups = new Cache<int, List<Actor>>(_ => new List<Actor>());
+
+		public void DoControlGroup(World world, int group, Modifiers mods)
+		{
+			if (mods.HasModifier(Modifiers.Ctrl))
+			{
+				if (actors.Count == 0)
+					return;
+
+				controlGroups[group].Clear();
+
+				for (var i = 0; i < 10; i++)	/* all control groups */
+					controlGroups[i].RemoveAll(a => actors.Contains(a));
+
+				controlGroups[group].AddRange(actors);
+				return;
+			}
+
+			if (mods.HasModifier(Modifiers.Alt))
+			{
+				Game.viewport.Center(controlGroups[group]);
+				return;
+			}
+
+			Combine(world, controlGroups[group],
+				mods.HasModifier(Modifiers.Shift), false);
+		}
+
+		public int? GetControlGroupForActor(Actor a)
+		{
+			return controlGroups.Where(g => g.Value.Contains(a))
+				.Select(g => (int?)g.Key)
+				.FirstOrDefault();
+		}
+	}
+}