big cleanup of Controller mess

OpenRa.Game/Orders/UnitOrderGenerator.cs

@@ -1,6 +1,8 @@
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
+using OpenRa.Game.Traits;
+using OpenRa.Game.GameRules;
 
 namespace OpenRa.Game.Orders
 {
@@ -33,5 +35,59 @@ namespace OpenRa.Game.Orders
 			foreach( var a in selection )
 				Game.worldRenderer.DrawSelectionBox( a, Color.White, true );
 		}
+
+		public Cursor GetCursor(int2 xy, MouseInput mi)
+		{
+			return ChooseCursor(mi);
+		}
+
+		Cursor ChooseCursor( MouseInput mi )
+		{
+			var p = Game.controller.MousePosition;
+			var c = Order(p.ToInt2(), mi)
+				.Where(o => o.Validate())
+				.Select(o => CursorForOrderString(o.OrderString, o.Subject, o.TargetLocation))
+				.FirstOrDefault(a => a != null);
+
+			return c ??
+				(Game.SelectActorsInBox(Game.CellSize * p, 
+				Game.CellSize * p).Any()
+					? Cursor.Select : Cursor.Default);
+		}
+
+		Cursor CursorForOrderString(string s, Actor a, int2 location)
+		{
+			var movement = a.traits.WithInterface<IMovement>().FirstOrDefault();
+			switch (s)
+			{
+				case "Attack": return Cursor.Attack;
+				case "Heal": return Cursor.Heal;
+				case "C4": return Cursor.C4;
+				case "Move":
+					if (movement.CanEnterCell(location))
+						return Cursor.Move;
+					else
+						return Cursor.MoveBlocked;
+				case "DeployMcv":
+					var factBuildingInfo = (BuildingInfo)Rules.UnitInfo["fact"];
+					if (Game.CanPlaceBuilding(factBuildingInfo, a.Location - new int2(1, 1), a, false))
+						return Cursor.Deploy;
+					else
+						return Cursor.DeployBlocked;
+				case "Deploy": return Cursor.Deploy;
+				case "Chronoshift":
+					if (movement.CanEnterCell(location))
+						return Cursor.Chronoshift;
+					else
+						return Cursor.MoveBlocked;
+				case "Enter": return Cursor.Enter;
+				case "Deliver": return Cursor.Enter;
+				case "Infiltrate": return Cursor.Enter;
+				case "Capture": return Cursor.Capture;
+				case "Harvest": return Cursor.Attack; // TODO: special harvest cursor?
+				default:
+					return null;
+			}
+		}
 	}
 }