Enable Repairable actors to call for transport to the repair pad

OpenRA.Mods.Common/Activities/WaitForTransport.cs

@@ -0,0 +1,51 @@
+#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 OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class WaitForTransport : Activity
+	{
+		readonly ICallForTransport transportable;
+
+		Activity inner;
+
+		public WaitForTransport(Actor self, Activity innerActivity)
+		{
+			transportable = self.TraitOrDefault<ICallForTransport>();
+			inner = innerActivity;
+		}
+
+		public override Activity Tick(Actor self)
+		{
+			if (inner == null)
+			{
+				if (transportable != null)
+					transportable.MovementCancelled(self);
+
+				return NextActivity;
+			}
+
+			inner = Util.RunActivity(self, inner);
+			return this;
+		}
+
+		public override void Cancel(Actor self)
+		{
+			if (transportable != null)
+				transportable.WantsTransport = false;
+
+			inner.Cancel(self);
+		}
+	}
+}

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

@@ -115,6 +115,7 @@
     <Compile Include="Activities\Turn.cs" />
     <Compile Include="Activities\UnloadCargo.cs" />
     <Compile Include="Activities\Wait.cs" />
+    <Compile Include="Activities\WaitForTransport.cs" />
     <Compile Include="ActorExts.cs" />
     <Compile Include="AI\AttackOrFleeFuzzy.cs" />
     <Compile Include="AI\BaseBuilder.cs" />

OpenRA.Mods.Common/Traits/Repairable.cs

@@ -42,8 +42,7 @@ namespace OpenRA.Mods.Common.Traits
 		{
 			get
 			{
-				yield return new EnterAlliedActorTargeter<Building>("Repair", 5,
-					target => CanRepairAt(target), _ => CanRepair() || CanRearm());
+				yield return new EnterAlliedActorTargeter<Building>("Repair", 5, CanRepairAt, _ => CanRepair() || CanRearm());
 			}
 		}
 
@@ -92,7 +91,20 @@ namespace OpenRA.Mods.Common.Traits
 				self.SetTargetLine(target, Color.Green);
 
 				self.CancelActivity();
-				self.QueueActivity(new MoveAdjacentTo(self, target));
+				self.QueueActivity(new WaitForTransport(self, Util.SequenceActivities(new MoveAdjacentTo(self, target),
+					new CallFunc(() => AfterReachActivities(self, order, movement)))));
+
+				TryCallTransport(self, target, new CallFunc(() => AfterReachActivities(self, order, movement)));
+			}
+		}
+
+		void AfterReachActivities(Actor self, Order order, IMove movement)
+		{
+			if (!order.TargetActor.IsInWorld || order.TargetActor.IsDead || order.TargetActor.IsDisabled())
+				return;
+
+			// TODO: This is hacky, but almost every single component affected
+			// will need to be rewritten anyway, so this is OK for now.
 			self.QueueActivity(movement.MoveTo(self.World.Map.CellContaining(order.TargetActor.CenterPosition), order.TargetActor));
 			if (CanRearmAt(order.TargetActor) && CanRearm())
 				self.QueueActivity(new Rearm(self));
@@ -101,6 +113,7 @@ namespace OpenRA.Mods.Common.Traits
 
 			var rp = order.TargetActor.TraitOrDefault<RallyPoint>();
 			if (rp != null)
+			{
 				self.QueueActivity(new CallFunc(() =>
 				{
 					self.SetTargetLine(Target.FromCell(self.World, rp.Location), Color.Green);
@@ -120,5 +133,18 @@ namespace OpenRA.Mods.Common.Traits
 			// Worst case FirstOrDefault() will return a TraitPair<null, null>, which is OK.
 			return repairBuilding.FirstOrDefault().Actor;
 		}
+
+		static void TryCallTransport(Actor self, Target target, Activity nextActivity)
+		{
+			var transport = self.TraitOrDefault<ICallForTransport>();
+			if (transport == null)
+				return;
+
+			var targetCell = self.World.Map.CellContaining(target.CenterPosition);
+			if ((self.CenterPosition - target.CenterPosition).LengthSquared < transport.MinimumDistance.Range * transport.MinimumDistance.Range)
+				return;
+
+			transport.RequestTransport(targetCell, nextActivity);
+		}
 	}
 }