Disable symlink resolving in Torrent creator

PR #19199.

src/gui/torrentcreatordialog.cpp

@@ -44,6 +44,18 @@
 
 #define SETTINGS_KEY(name) u"TorrentCreator/" name
 
+namespace
+{
+    // When the root file/directory of the created torrent is a symlink, we want to keep the symlink name in the torrent.
+    // On Windows, however, QFileDialog::DontResolveSymlinks disables shortcuts (.lnk files) expansion, making it impossible to pick a file if its path contains a shortcut.
+    // As of NTFS symlinks, they don't seem to be resolved anyways.
+#ifndef Q_OS_WIN
+    const QFileDialog::Options FILE_DIALOG_OPTIONS {QFileDialog::DontResolveSymlinks};
+#else
+    const QFileDialog::Options FILE_DIALOG_OPTIONS {};
+#endif
+}
+
 TorrentCreatorDialog::TorrentCreatorDialog(QWidget *parent, const Path &defaultPath)
     : QDialog(parent)
     , m_ui(new Ui::TorrentCreatorDialog)
@@ -106,14 +118,15 @@ void TorrentCreatorDialog::updateInputPath(const Path &path)
 void TorrentCreatorDialog::onAddFolderButtonClicked()
 {
     const QString oldPath = m_ui->textInputPath->text();
-    const Path path {QFileDialog::getExistingDirectory(this, tr("Select folder"), oldPath)};
+    const Path path {QFileDialog::getExistingDirectory(this, tr("Select folder")
+            , oldPath, (QFileDialog::ShowDirsOnly | FILE_DIALOG_OPTIONS))};
     updateInputPath(path);
 }
 
 void TorrentCreatorDialog::onAddFileButtonClicked()
 {
     const QString oldPath = m_ui->textInputPath->text();
-    const Path path {QFileDialog::getOpenFileName(this, tr("Select file"), oldPath)};
+    const Path path {QFileDialog::getOpenFileName(this, tr("Select file"), oldPath, QString(), nullptr, FILE_DIALOG_OPTIONS)};
     updateInputPath(path);
 }
 
@@ -170,7 +183,12 @@ void TorrentCreatorDialog::dragEnterEvent(QDragEnterEvent *event)
 // Main function that create a .torrent file
 void TorrentCreatorDialog::onCreateButtonClicked()
 {
+#ifdef Q_OS_WIN
+    // Resolve the path in case it contains a shortcut (otherwise, the following usages will consider it invalid)
     const auto inputPath = Utils::Fs::toCanonicalPath(Path(m_ui->textInputPath->text().trimmed()));
+#else
+    const auto inputPath = Path(m_ui->textInputPath->text().trimmed());
+#endif
 
     // test if readable
     if (!Utils::Fs::isReadable(inputPath))