stop fastzip from extracting on cancellation

Bloxstrap/Bootstrapper.cs

@@ -16,6 +16,9 @@
 
 using Microsoft.Win32;
 
+using ICSharpCode.SharpZipLib.Zip;
+using ICSharpCode.SharpZipLib.Core;
+
 using Bloxstrap.AppData;
 
 namespace Bloxstrap
@@ -1048,6 +1051,12 @@ private async Task DownloadPackage(Package package)
  }
  }
 
+ private void OnFastZipProcessFile(object sender, ScanEventArgs e)
+ {
+ // stop extracting if cancellation requested
+ e.ContinueRunning = !_cancelTokenSource.IsCancellationRequested;
+ }
+
  private void ExtractPackage(Package package, List<string>? files = null)
  {
  const string LOG_IDENT = "Bootstrapper::ExtractPackage";
@@ -1068,7 +1077,10 @@ private void ExtractPackage(Package package, List<string>? files = null)
 
  App.Logger.WriteLine(LOG_IDENT, $"Extracting {package.Name}...");
 
- var fastZip = new ICSharpCode.SharpZipLib.Zip.FastZip();
+ var events = new FastZipEvents();
+ events.ProcessFile += OnFastZipProcessFile;
+
+ var fastZip = new FastZip(events);
  fastZip.ExtractZip(package.DownloadPath, packageFolder, fileFilter);
 
  App.Logger.WriteLine(LOG_IDENT, $"Finished extracting {package.Name}");