Selectively power-up/down buildings via chrome

OpenRa.Game/Orders/PowerDownOrderGenerator.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.GameRules;
+using OpenRa.Game.Traits;
+
+namespace OpenRa.Game.Orders
+{
+	class PowerDownOrderGenerator : IOrderGenerator
+	{
+		public IEnumerable<Order> Order(int2 xy, MouseInput mi)
+		{
+			if (mi.Button == MouseButton.Right)
+				Game.controller.CancelInputMode();
+
+			return OrderInner(xy, mi);
+		}
+
+		IEnumerable<Order> OrderInner(int2 xy, MouseInput mi)
+		{
+			if (mi.Button == MouseButton.Left)
+			{
+				var loc = mi.Location + Game.viewport.Location;
+				var underCursor = Game.FindUnits(loc, loc)
+					.Where(a => a.Owner == Game.LocalPlayer
+						&& a.traits.Contains<Building>()
+						&& a.Info.Selectable).FirstOrDefault();
+
+				var building = underCursor != null ? underCursor.Info as BuildingInfo : null;
+
+				if (building != null)
+					yield return new Order("PowerDown", underCursor, null, int2.Zero, null);
+			}
+		}
+
+		public void Tick() { }
+		public void Render() { }
+
+		public Cursor GetCursor(int2 xy, MouseInput mi)
+		{
+			mi.Button = MouseButton.Left;
+			return OrderInner(xy, mi).Any()
+				? Cursor.PowerDown : Cursor.PowerDown;
+		}
+	}
+}