New Wait activity

OpenRA.Game/OpenRA.Game.csproj

@@ -285,6 +285,7 @@
     <Compile Include="Chrome\DefaultWidgetDelegates.cs" />
     <Compile Include="Chrome\CheckboxWidget.cs" />
     <Compile Include="Traits\HasUnitOnBuild.cs" />
+    <Compile Include="Traits\Activities\Wait.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">

OpenRA.Game/Traits/Activities/Wait.cs

@@ -0,0 +1,32 @@
+
+using System;
+
+namespace OpenRA.Traits.Activities
+{
+
+	public class Wait: IActivity	
+	{
+	int remainingTicks;
+		
+		public Wait (int period) 
+		{
+			remainingTicks = period;
+		}
+		
+		public IActivity Tick (Actor self)
+		{
+			if (remainingTicks-- == 0) return NextActivity;
+			return this;
+		}
+		
+		
+		public void Cancel (Actor self)
+		{
+			remainingTicks = 0; NextActivity = null;
+		}
+		
+		
+		public IActivity NextActivity { get; set; }
+
+	}
+}