Allow server to send cursor-located popup messages.

Content.Client/ClientNotifyManager.cs

@@ -42,9 +42,16 @@ namespace Content.Client
         }
 
         private void DoNotifyMessage(MsgDoNotify message)
+        {
+            if (message.AtCursor)
+            {
+                PopupMessage(message.Message);
+            }
+            else
             {
                 PopupMessage(_eyeManager.WorldToScreen(message.Coordinates), message.Message);
             }
+        }
 
         public override void PopupMessage(GridCoordinates coordinates, IEntity viewer, string message)
         {
@@ -56,6 +63,16 @@ namespace Content.Client
             PopupMessage(_eyeManager.WorldToScreen(coordinates), message);
         }
 
+        public override void PopupMessageCursor(IEntity viewer, string message)
+        {
+            if (viewer != _playerManager.LocalPlayer.ControlledEntity)
+            {
+                return;
+            }
+
+            PopupMessage(message);
+        }
+
         public void PopupMessage(ScreenCoordinates coordinates, string message)
         {
             var label = new PopupLabel

Content.Server/ServerNotifyManager.cs

@@ -42,6 +42,19 @@ namespace Content.Server
             _netManager.ServerSendMessage(netMessage, actor.playerSession.ConnectedClient);
         }
 
+        public override void PopupMessageCursor(IEntity viewer, string message)
+        {
+            if (!viewer.TryGetComponent(out IActorComponent actor))
+            {
+                return;
+            }
+
+            var netMessage = _netManager.CreateNetMessage<MsgDoNotify>();
+            netMessage.Message = message;
+            netMessage.AtCursor = true;
+            _netManager.ServerSendMessage(netMessage, actor.playerSession.ConnectedClient);
+        }
+
         public class PopupMsgCommand : IClientCommand
         {
             public string Command => "srvpopupmsg";

Content.Shared/Interfaces/ISharedNotifyManager.cs

@@ -8,6 +8,7 @@ namespace Content.Shared.Interfaces
     {
         void PopupMessage(IEntity source, IEntity viewer, string message);
         void PopupMessage(GridCoordinates coordinates, IEntity viewer, string message);
+        void PopupMessageCursor(IEntity viewer, string message);
     }
 
     public static class NotifyManagerExt

Content.Shared/SharedNotifyManager.cs

@@ -17,6 +17,7 @@ namespace Content.Shared
         }
 
         public abstract void PopupMessage(GridCoordinates coordinates, IEntity viewer, string message);
+        public abstract void PopupMessageCursor(IEntity viewer, string message);
 
         protected class MsgDoNotify : NetMessage
         {
@@ -29,19 +30,29 @@ namespace Content.Shared
             #endregion
 
             public string Message { get; set; }
-            public GridCoordinates Coordinates;
+            public bool AtCursor { get; set; }
+            public GridCoordinates Coordinates { get; set; }
 
             public override void ReadFromBuffer(NetIncomingMessage buffer)
             {
                 Message = buffer.ReadString();
+                AtCursor = buffer.ReadBoolean();
+                if (!AtCursor)
+                {
                     Coordinates = buffer.ReadGridLocalCoordinates();
                 }
+            }
 
             public override void WriteToBuffer(NetOutgoingMessage buffer)
             {
                 buffer.Write(Message);
+                buffer.Write(AtCursor);
+
+                if (!AtCursor)
+                {
                     buffer.Write(Coordinates);
                 }
             }
         }
+    }
 }