Moves Attack, Armament, Move, Air traits and activities as well as anything required by them to Mods.Common.

Extracts Exit from Production into its own trait.

OpenRA.Mods.Common/Activities/Air/FlyAttack.cs

@@ -0,0 +1,64 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Linq;
+using OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class FlyAttack : Activity
+	{
+		readonly Target target;
+		Activity inner;
+		int ticksUntilTurn = 50;
+
+		public FlyAttack(Target target) { this.target = target; }
+
+		public override Activity Tick(Actor self)
+		{
+			if (!target.IsValidFor(self))
+				return NextActivity;
+
+			var limitedAmmo = self.TraitOrDefault<LimitedAmmo>();
+			if (limitedAmmo != null && !limitedAmmo.HasAmmo())
+				return NextActivity;
+
+			var attack = self.TraitOrDefault<AttackPlane>();
+			if (attack != null)
+				attack.DoAttack(self, target);
+
+			if (inner == null)
+			{
+				if (IsCanceled)
+					return NextActivity;
+
+				if (target.IsInRange(self.CenterPosition, attack.Armaments.Select(a => a.Weapon.MinRange).Min()))
+					inner = Util.SequenceActivities(new FlyTimed(ticksUntilTurn), new Fly(self, target), new FlyTimed(ticksUntilTurn));
+				else
+					inner = Util.SequenceActivities(new Fly(self, target), new FlyTimed(ticksUntilTurn));
+			}
+
+			inner = Util.RunActivity(self, inner);
+
+			return this;
+		}
+
+		public override void Cancel(Actor self)
+		{
+			if (!IsCanceled && inner != null)
+				inner.Cancel(self);
+
+			// NextActivity must always be set to null:
+			base.Cancel(self);
+		}
+	}
+}