Add pipe coloring (#4261)

Content.Client/Atmos/Visualizers/EnabledAtmosDeviceVisualizer.cs

@@ -0,0 +1,39 @@
+using System;
+using JetBrains.Annotations;
+using Robust.Client.GameObjects;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Client.Atmos.Visualizers
+{
+    [UsedImplicitly]
+    public abstract class EnabledAtmosDeviceVisualizer : AppearanceVisualizer
+    {
+        [DataField("enabledState")]
+        private string _enabledState = string.Empty;
+        protected abstract object LayerMap { get; }
+        protected abstract Enum DataKey { get; }
+
+        public override void InitializeEntity(IEntity entity)
+        {
+            base.InitializeEntity(entity);
+
+            if (!entity.TryGetComponent(out ISpriteComponent? sprite))
+                return;
+
+            sprite.LayerMapSet(LayerMap, sprite.AddLayerState(_enabledState));
+            sprite.LayerSetVisible(LayerMap, false);
+        }
+
+        public override void OnChangeData(AppearanceComponent component)
+        {
+            base.OnChangeData(component);
+
+            if (!component.Owner.TryGetComponent(out ISpriteComponent? sprite))
+                return;
+
+            if(component.TryGetData(DataKey, out bool enabled))
+                sprite.LayerSetVisible(LayerMap, enabled);
+        }
+    }
+}