Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Traits/Conditions/GrantCondition.cs

@@ -0,0 +1,51 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Grants a condition while the trait is active.")]
+	sealed class GrantConditionInfo : ConditionalTraitInfo
+	{
+		[FieldLoader.Require]
+		[GrantedConditionReference]
+		[Desc("Condition to grant.")]
+		public readonly string Condition = null;
+
+		[Desc("Is the condition irrevocable once it has been activated?")]
+		public readonly bool GrantPermanently = false;
+
+		public override object Create(ActorInitializer init) { return new GrantCondition(this); }
+	}
+
+	sealed class GrantCondition : ConditionalTrait<GrantConditionInfo>
+	{
+		int conditionToken = Actor.InvalidConditionToken;
+
+		public GrantCondition(GrantConditionInfo info)
+			: base(info) { }
+
+		protected override void TraitEnabled(Actor self)
+		{
+			if (conditionToken == Actor.InvalidConditionToken)
+				conditionToken = self.GrantCondition(Info.Condition);
+		}
+
+		protected override void TraitDisabled(Actor self)
+		{
+			if (Info.GrantPermanently || conditionToken == Actor.InvalidConditionToken)
+				return;
+
+			conditionToken = self.RevokeCondition(conditionToken);
+		}
+	}
+}