Add ForceModifiersOrderGenerator for force move/attack and queueing.

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -811,6 +811,7 @@
     <Compile Include="Traits\TunnelEntrance.cs" />
     <Compile Include="FileSystem\InstallShieldPackage.cs" />
     <Compile Include="FileFormats\Blast.cs" />
+    <Compile Include="Orders\ForceModifiersOrderGenerator.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Target Name="AfterBuild">

OpenRA.Mods.Common/Orders/ForceModifiersOrderGenerator.cs

@@ -0,0 +1,46 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Orders;
+
+namespace OpenRA.Mods.Common.Orders
+{
+	public class ForceModifiersOrderGenerator : UnitOrderGenerator
+	{
+		public readonly Modifiers Modifiers;
+		readonly bool cancelOnFirstUse;
+
+		public ForceModifiersOrderGenerator(Modifiers modifiers, bool cancelOnFirstUse)
+		{
+			Modifiers = modifiers;
+			this.cancelOnFirstUse = cancelOnFirstUse;
+		}
+
+		public override IEnumerable<Order> Order(World world, CPos cell, int2 worldPixel, MouseInput mi)
+		{
+			mi.Modifiers |= Modifiers;
+
+			if (cancelOnFirstUse)
+				world.CancelInputMode();
+
+			return base.Order(world, cell, worldPixel, mi);
+		}
+
+		public override string GetCursor(World world, CPos cell, int2 worldPixel, MouseInput mi)
+		{
+			mi.Modifiers |= Modifiers;
+			return base.GetCursor(world, cell, worldPixel, mi);
+		}
+	}
+}