Typing indicator (typing chat bubble) (#8215)

Content.Shared/Chat/TypingIndicator/TypingIndicatorComponent.cs

@@ -0,0 +1,20 @@
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Shared.Chat.TypingIndicator;
+
+/// <summary>
+///     Show typing indicator icon when player typing text in chat box.
+///     Added automatically when player poses entity.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+[Friend(typeof(SharedTypingIndicatorSystem))]
+public sealed class TypingIndicatorComponent : Component
+{
+    /// <summary>
+    ///     Prototype id that store all visual info about typing indicator.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadOnly)]
+    [DataField("proto", customTypeSerializer: typeof(PrototypeIdSerializer<TypingIndicatorPrototype>))]
+    public string Prototype = "default";
+}