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/TooltipDescription.cs

@@ -0,0 +1,57 @@
+#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("Additional info shown in the battlefield tooltip.")]
+	public class TooltipDescriptionInfo : ConditionalTraitInfo
+	{
+		[FieldLoader.Require]
+		[FluentReference]
+		[Desc("Text shown in tooltip.")]
+		public readonly string Description;
+
+		[Desc("Player relationships who can view the description.")]
+		public readonly PlayerRelationship ValidRelationships = PlayerRelationship.Ally | PlayerRelationship.Neutral | PlayerRelationship.Enemy;
+
+		public override object Create(ActorInitializer init) { return new TooltipDescription(init.Self, this); }
+	}
+
+	public class TooltipDescription : ConditionalTrait<TooltipDescriptionInfo>, IProvideTooltipInfo
+	{
+		readonly Actor self;
+
+		public Player Owner => self.EffectiveOwner != null ? self.EffectiveOwner.Owner : self.Owner;
+
+		public TooltipDescription(Actor self, TooltipDescriptionInfo info)
+			: base(info)
+		{
+			this.self = self;
+			TooltipText = FluentProvider.GetMessage(info.Description);
+		}
+
+		public bool IsTooltipVisible(Player forPlayer)
+		{
+			if (IsTraitDisabled)
+				return false;
+
+			// Visibility can't be determined for null owners or viewers
+			if (Owner == null || forPlayer == null)
+				return false;
+
+			return Info.ValidRelationships.HasRelationship(Owner.RelationshipWith(forPlayer));
+		}
+
+		public string TooltipText { get; }
+	}
+}