move aircraft code into Mods.RA/Air/

OpenRA.Mods.RA/Air/FlyAttack.cs

@@ -0,0 +1,69 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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 LICENSE.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Air
+{
+	public class FlyAttack : CancelableActivity
+	{
+		readonly Target Target;
+		IActivity inner;
+
+		public FlyAttack(Target target) { Target = target; }
+
+		public override IActivity Tick(Actor self)
+		{
+			if( !Target.IsValid )
+				Cancel( self );
+			var limitedAmmo = self.TraitOrDefault<LimitedAmmo>();
+			if( limitedAmmo != null && !limitedAmmo.HasAmmo() )
+				Cancel( self );
+
+			self.Trait<AttackPlane>().DoAttack( self, Target );
+
+			if( inner == null )
+			{
+				if( IsCanceled )
+					return NextActivity;
+				inner = Util.SequenceActivities(
+					Fly.ToPx(Target.CenterLocation),
+					new FlyTimed(50));
+			}
+			inner = inner.Tick( self );
+
+			return this;
+		}
+
+		protected override bool OnCancel( Actor self )
+		{
+			if( inner != null )
+				inner.Cancel( self );
+			return base.OnCancel( self );
+		}
+	}
+
+	public class FlyCircle : CancelableActivity
+	{
+		int2 Target;
+
+		public FlyCircle(int2 target) { Target = target; }
+
+		public override IActivity Tick(Actor self)
+		{
+			if( IsCanceled ) return NextActivity;
+
+			return Util.SequenceActivities(
+				Fly.ToCell(Target),
+				new FlyTimed(50),
+				this);
+		}
+	}
+}