Add exit handler which fires when Touch Portal exits with the plugin …

TouchPortalApi/Interfaces/IMessageProcessor.cs

@@ -7,12 +7,14 @@ namespace TouchPortalApi.Interfaces {
   public delegate void ListChangeEventHandler(string actionId, string listId, string instanceId, string value);
   public delegate void CloseEventHandler();
   public delegate void ConnectEventHandler();
+  public delegate void ExitHandler();
 
   public interface IMessageProcessor {
     event ActionEventHandler OnActionEvent;
     event ListChangeEventHandler OnListChangeEventHandler;
     event CloseEventHandler OnCloseEventHandler;
     event ConnectEventHandler OnConnectEventHandler;
+    event ExitHandler OnExitHandler;
 
     Task Listen();
     Task TryPairAsync();

TouchPortalApi/MessageProcessor.cs

@@ -2,6 +2,7 @@
 using Newtonsoft.Json;
 using System;
 using System.Buffers;
+using System.Net.Sockets;
 using System.Threading;
 using System.Threading.Tasks;
 using TouchPortalApi.Configuration;
@@ -28,6 +29,7 @@ public class MessageProcessor : IMessageProcessor {
     public event ListChangeEventHandler OnListChangeEventHandler;
     public event CloseEventHandler OnCloseEventHandler;
     public event ConnectEventHandler OnConnectEventHandler;
+    public event ExitHandler OnExitHandler;
 
     #endregion
 
@@ -61,6 +63,9 @@ public async Task Listen() {
       while (!_cancellationToken.IsCancellationRequested) {
         try {
           await _tPClient.ProcessPipes();
+        } catch (SocketException) {
+          OnExitHandler?.Invoke();
+          return;
         } catch (Exception ex) {
           Console.WriteLine(ex);
         }

TouchPortalApi/TPClient.cs

@@ -5,6 +5,7 @@
 using System.Buffers;
 using System.IO.Pipelines;
 using System.Net;
+using System.Net.Sockets;
 using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading;
@@ -85,6 +86,8 @@ public async Task ProcessPipes() {
       Task reading = ReadPipeAsync(pipe.Reader);
 
       await Task.WhenAll(reading, writing).ConfigureAwait(false);
+      if(!_tpsocket.Connected)
+        throw new SocketException();
     }
 
     /// <summary>