add jumptoline for IEditor.cs

src/OneWare.Essentials/Helpers/PlatformHelper.cs

@@ -1,4 +1,6 @@
 using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
 using System.Runtime.InteropServices;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
@@ -305,5 +307,15 @@ public static void ActivateWindow(IntPtr mainWindowHandle, IntPtr displayHandle)
             : KeyModifiers.Control;
 
         #endregion
+
+        private static readonly IPEndPoint DefaultLoopbackEndpoint = new(IPAddress.Loopback, 0);
+
+        public static int GetAvailablePort()
+        {
+            using var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+            socket.Bind(DefaultLoopbackEndpoint);
+
+            return (socket.LocalEndPoint as IPEndPoint)?.Port ?? throw new Exception("Error getting free port!");
+        }
     }
 }

src/OneWare.Essentials/ViewModels/IEditor.cs

@@ -6,7 +6,12 @@ namespace OneWare.Essentials.ViewModels;
 public interface IEditor : IExtendedDocument
 {
     public ExtendedTextEditor Editor { get; }
+
     public TextDocument CurrentDocument { get; }
+
     public void Select(int offset, int length);
+
+    public void JumpToLine(int lineNumber, bool select = true);
+
     public event EventHandler? FileSaved;
 }