Added: QueuedActivity (to be used for chaining orders)

OpenRA.Mods.RA/Activities/QueuedActivity.cs

@@ -0,0 +1,82 @@
+#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 System;
+using System.Collections.Generic;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Activities
+{
+	public class QueuedActivity : IActivity
+	{
+		public QueuedActivity(Action<QueuedActivity> a) { this.a = a; }
+		public QueuedActivity(bool runChildOnFirstTick, Action<QueuedActivity> a) : this(a, true, runChildOnFirstTick) { }
+
+		public QueuedActivity(Action<QueuedActivity> a, bool interruptable, bool runChildOnFirstTick)
+		{
+			this.a = a;
+			this.interruptable = interruptable;
+			runChildOnFirstTick = runChildOnFirstTick;
+		}
+
+		Action<QueuedActivity> a;
+		private bool interruptable = true;
+		private bool runChild = false;
+		public IActivity NextActivity { get; set; }
+
+		public IActivity Tick(Actor self) { return Run(self); }
+
+		public IActivity Run(Actor self)
+		{
+			if (a != null)
+				a(this);
+			if (runChild && NextActivity != null)
+				return NextActivity.Tick(self);
+
+			return NextActivity;
+		}
+
+		public void Insert(IActivity activity)
+		{
+			if (activity == null)
+				return;
+			activity.Queue(NextActivity);
+			NextActivity = activity;
+		}
+
+		public void Cancel(Actor self)
+		{
+			if (!interruptable)
+				return;
+			
+			a = null;
+			NextActivity = null;
+		}
+
+		public void Queue( IActivity activity )
+		{
+			if( NextActivity != null )
+				NextActivity.Queue( activity );
+			else
+				NextActivity = activity;
+		}
+
+		public IEnumerable<float2> GetCurrentPath()
+		{
+			if (NextActivity != null)
+				foreach (var path in NextActivity.GetCurrentPath())
+				{
+					yield return path;
+				}
+
+			yield break;
+		}
+	}
+}