add a Lua controllable flash palette trait

OpenRA.Mods.Common/Scripting/Global/EffectGlobal.cs

@@ -0,0 +1,36 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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.Collections.Generic;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Scripting;
+
+namespace OpenRA.Mods.Common.Scripting
+{
+	[ScriptGlobal("Effect")]
+	public class EffectGlobal : ScriptGlobal
+	{
+		readonly IEnumerable<FlashPaletteEffect> fpes;
+
+		public EffectGlobal(ScriptContext context)
+			: base(context)
+		{
+			fpes = context.World.WorldActor.TraitsImplementing<FlashPaletteEffect>();
+		}
+
+		[Desc("Controls the `FlashPaletteEffect` trait.")]
+		public void Flash(string type = null, int ticks = -1)
+		{
+			foreach (var fpe in fpes)
+				if (fpe.Info.Type == type)
+					fpe.Enable(ticks);
+		}
+	}
+}