Moved DrawLineToTarget from Game to Mods.Common

OpenRA.Mods.Common/Traits/Render/DrawLineToTarget.cs

@@ -0,0 +1,139 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.Drawing;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	public class DrawLineToTargetInfo : ITraitInfo
+	{
+		public readonly int Delay = 60;
+
+		public virtual object Create(ActorInitializer init) { return new DrawLineToTarget(init.Self, this); }
+	}
+
+	public class DrawLineToTarget : IPostRenderSelection, INotifySelected, INotifyBecomingIdle
+	{
+		Actor self;
+		DrawLineToTargetInfo info;
+		List<Target> targets;
+		Color c;
+		int lifetime;
+
+		public DrawLineToTarget(Actor self, DrawLineToTargetInfo info) { this.self = self; this.info = info; }
+
+		public void SetTarget(Actor self, Target target, Color c, bool display)
+		{
+			targets = new List<Target> { target };
+			this.c = c;
+
+			if (display)
+				lifetime = info.Delay;
+		}
+
+		public void SetTargets(Actor self, List<Target> targets, Color c, bool display)
+		{
+			this.targets = targets;
+			this.c = c;
+
+			if (display)
+				lifetime = info.Delay;
+		}
+
+		public void Selected(Actor a)
+		{
+			if (a.IsIdle)
+				return;
+
+			// Reset the order line timeout.
+			lifetime = info.Delay;
+		}
+
+		public IEnumerable<IRenderable> RenderAfterWorld(WorldRenderer wr)
+		{
+			var force = Game.GetModifierKeys().HasModifier(Modifiers.Alt);
+			if ((lifetime <= 0 || --lifetime <= 0) && !force)
+				yield break;
+
+			if (!(force || Game.Settings.Game.DrawTargetLine))
+				yield break;
+
+			if (targets == null || targets.Count == 0)
+				yield break;
+
+			foreach (var target in targets)
+			{
+				if (target.Type == TargetType.Invalid)
+					continue;
+
+				yield return new TargetLineRenderable(new[] { self.CenterPosition, target.CenterPosition }, c);
+			}
+		}
+
+		public void OnBecomingIdle(Actor a)
+		{
+			if (a.IsIdle)
+				targets = null;
+		}
+	}
+
+	public static class LineTargetExts
+	{
+		public static void SetTargetLines(this Actor self, List<Target> targets, Color color)
+		{
+			var line = self.TraitOrDefault<DrawLineToTarget>();
+			if (line != null)
+				self.World.AddFrameEndTask(w => line.SetTargets(self, targets, color, false));
+		}
+
+		public static void SetTargetLine(this Actor self, Target target, Color color)
+		{
+			self.SetTargetLine(target, color, true);
+		}
+
+		public static void SetTargetLine(this Actor self, Target target, Color color, bool display)
+		{
+			if (self.Owner != self.World.LocalPlayer)
+				return;
+
+			self.World.AddFrameEndTask(w =>
+			{
+				if (self.Disposed)
+					return;
+
+				var line = self.TraitOrDefault<DrawLineToTarget>();
+				if (line != null)
+					line.SetTarget(self, target, color, display);
+			});
+		}
+
+		public static void SetTargetLine(this Actor self, FrozenActor target, Color color, bool display)
+		{
+			if (self.Owner != self.World.LocalPlayer)
+				return;
+
+			self.World.AddFrameEndTask(w =>
+			{
+				if (self.Disposed)
+					return;
+
+				target.Flash();
+
+				var line = self.TraitOrDefault<DrawLineToTarget>();
+				if (line != null)
+					line.SetTarget(self, Target.FromPos(target.CenterPosition), color, display);
+			});
+		}
+	}
+}