Fix "Open destination folder" functionality to consider torrent root folder

src/qtlibtorrent/qtorrenthandle.cpp

@@ -551,6 +551,18 @@ QString QTorrentHandle::firstFileSavePath() const {
   return fsave_path;
 }
 
+QString QTorrentHandle::root_path() const
+{
+  if (num_files() < 2)
+    return save_path();
+   QString first_filepath = filepath_at(0);
+   const int slashIndex = first_filepath.indexOf(QRegExp("[/\\\\]"));
+   QString root_folder;
+   if (slashIndex >= 0)
+     return QDir(save_path()).absoluteFilePath(first_filepath.left(slashIndex));
+   return save_path();
+}
+
 bool QTorrentHandle::has_error() const {
 #if LIBTORRENT_VERSION_MINOR > 15
   torrent_status st = torrent_handle::status(0x0);

src/transferlistwidget.cpp

@@ -402,16 +402,16 @@ void TransferListWidget::hidePriorityColumn(bool hide) {
 }
 
 void TransferListWidget::openSelectedTorrentsFolder() const {
-  QStringList pathsList;
+  QSet<QString> pathsList;
   const QStringList hashes = getSelectedTorrentsHashes();
   foreach (const QString &hash, hashes) {
     const QTorrentHandle h = BTSession->getTorrentHandle(hash);
     if (h.is_valid()) {
-      const QString savePath = h.save_path();
-      qDebug("Opening path at %s", qPrintable(savePath));
-      if (!pathsList.contains(savePath)) {
-        pathsList.append(savePath);
-        QDesktopServices::openUrl(QUrl::fromLocalFile(savePath));
+      QString rootFolder = h.root_path();
+      qDebug("Opening path at %s", qPrintable(rootFolder));
+      if (!pathsList.contains(rootFolder)) {
+        pathsList.insert(rootFolder);
+        QDesktopServices::openUrl(QUrl::fromLocalFile(rootFolder));
       }
     }
   }