add default token field and check token

Author: taooceros

Flow.Launcher.Plugin/Interfaces/Feature.cs

@@ -5,7 +5,9 @@
 
 namespace Flow.Launcher.Plugin
 {
-    public interface IFeatures { }
+    public interface IFeatures
+    {
+    }
 
     public interface IContextMenu : IFeatures
     {
@@ -33,6 +35,6 @@ public class ResultUpdatedEventArgs : EventArgs
     {
         public List<Result> Results;
         public Query Query;
-        public CancellationToken Token { get; init; }
+        public CancellationToken Token { get; init; } = default;
     }
-}
+}

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -135,14 +135,13 @@ private void RegisterResultsUpdatedEvent()
                 var plugin = (IResultUpdated)pair.Plugin;
                 plugin.ResultsUpdated += (s, e) =>
                 {
-                    if (e.Query.RawQuery == QueryText) // TODO: allow cancellation
+                    if (e.Query.RawQuery == QueryText && !e.Token.IsCancellationRequested)
                     {
                         PluginManager.UpdatePluginMetadata(e.Results, pair.Metadata, e.Query);
-                        if (!_resultsUpdateChannelWriter.TryWrite(new ResultsForUpdate(e.Results, pair.Metadata, e.Query, _updateToken)))
+                        if (!_resultsUpdateChannelWriter.TryWrite(new ResultsForUpdate(e.Results, pair.Metadata, e.Query, e.Token)))
                         {
                             Log.Error("MainViewModel", "Unable to add item to Result Update Queue");
                         }
-                        ;
                     }
                 };
             }