Add OnCapture, OnAddedToWorld and OnRemovedFromWorld triggers to Lua API

This brings the new Lua API up to feature-parity with the old API in the
trigger department.

OpenRA.Mods.RA/Scripting/Global/TriggerGlobal.cs

@@ -144,6 +144,27 @@ namespace OpenRA.Mods.RA.Scripting
 			GetScriptTriggers(player.PlayerActor).RegisterCallback(Trigger.OnObjectiveFailed, func, context);
 		}
 
+		[Desc("Call a function when this actor is added to the world. " +
+		      "The callback function will be called as func(Actor self).")]
+		public void OnAddedToWorld(Actor a, LuaFunction func)
+		{
+			GetScriptTriggers(a).RegisterCallback(Trigger.OnAddedToWorld, func, context);
+		}
+
+		[Desc("Call a function when this actor is removed from the world. " +
+		      "The callback function will be called as func(Actor self).")]
+		public void OnRemovedFromWorld(Actor a, LuaFunction func)
+		{
+			GetScriptTriggers(a).RegisterCallback(Trigger.OnRemovedFromWorld, func, context);
+		}
+
+		[Desc("Call a function when this actor is captured. The callback function " +
+		      "will be called as func(Actor self, Actor captor, Player oldOwner, Player newOwner).")]
+		public void OnCapture(Actor a, LuaFunction func)
+		{
+			GetScriptTriggers(a).RegisterCallback(Trigger.OnCapture, func, context);
+		}
+
 		[Desc("Removes all triggers from this actor")]
 		public void ClearAll(Actor a)
 		{

OpenRA.Mods.RA/Scripting/ScriptTriggers.cs

@@ -18,12 +18,13 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Scripting
 {
-	public enum Trigger { OnIdle, OnDamaged, OnKilled, OnProduction, OnPlayerWon, OnPlayerLost, OnObjectiveAdded, OnObjectiveCompleted, OnObjectiveFailed };
+	public enum Trigger { OnIdle, OnDamaged, OnKilled, OnProduction, OnPlayerWon, OnPlayerLost, OnObjectiveAdded,
+		OnObjectiveCompleted, OnObjectiveFailed, OnCapture, OnAddedToWorld, OnRemovedFromWorld };
 
 	[Desc("Allows map scripts to attach triggers to this actor via the Triggers global.")]
 	public class ScriptTriggersInfo : TraitInfo<ScriptTriggers> { }
 
-	public sealed class ScriptTriggers : INotifyIdle, INotifyDamage, INotifyKilled, INotifyProduction, INotifyObjectivesUpdated, IDisposable
+	public sealed class ScriptTriggers : INotifyIdle, INotifyDamage, INotifyKilled, INotifyProduction, INotifyObjectivesUpdated, INotifyCapture, INotifyAddedToWorld, INotifyRemovedFromWorld, IDisposable
 	{
 		public event Action<Actor> OnKilledInternal = _ => {};
 
@@ -146,6 +147,42 @@ namespace OpenRA.Mods.RA.Scripting
 			}
 		}
 
+		public void OnCapture(Actor self, Actor captor, Player oldOwner, Player newOwner)
+		{
+			foreach (var f in Triggers[Trigger.OnCapture])
+			{
+				var a = self.ToLuaValue(f.Second);
+				var b = captor.ToLuaValue(f.Second);
+				var c = oldOwner.ToLuaValue(f.Second);
+				var d = newOwner.ToLuaValue(f.Second);
+				f.First.Call(a, b, c, d).Dispose();
+				a.Dispose();
+				b.Dispose();
+				c.Dispose();
+				d.Dispose();
+			}
+		}
+
+		public void AddedToWorld(Actor self)
+		{
+			foreach (var f in Triggers[Trigger.OnAddedToWorld])
+			{
+				var a = self.ToLuaValue(f.Second);
+				f.First.Call(a).Dispose();
+				a.Dispose();
+			}
+		}
+
+		public void RemovedFromWorld(Actor self)
+		{
+			foreach (var f in Triggers[Trigger.OnRemovedFromWorld])
+			{
+				var a = self.ToLuaValue(f.Second);
+				f.First.Call(a).Dispose();
+				a.Dispose();
+			}
+		}
+
 		public void Clear(Trigger trigger)
 		{
 			Triggers[trigger].Clear();