Keep deferred drag results owned by their operation

tools/chatgui/src/member_files/browser.cpp

@@ -37,6 +37,7 @@
 #include <QEventLoop>
 #include <QCloseEvent>
 #include <functional>
+#include <memory>
 #include <limits>
 #include <cstring>
 extern "C" {
@@ -542,17 +543,13 @@ void MemberFileBrowser::download(bool open) {
     m_openAfter = open; startTransfer(selectedPath(), local, false, selectedVersion());
 }
 
-void MemberFileBrowser::publishExport(const QStringList& paths, bool clipboard) {
+void MemberFileBrowser::publishExport(const QStringList& paths) {
     auto* mime = new QMimeData; QList<QUrl> urls; QByteArray gnome("copy");
     for (const auto& path : paths) { QUrl url = QUrl::fromLocalFile(path); urls.append(url); gnome += '\n' + url.toEncoded(); }
     mime->setUrls(urls); mime->setData("x-special/gnome-copied-files", gnome); mime->setData("application/x-kde-cutselection", "0");
-    DEBUG_INFO(DEBUG_CATEGORY_MEDIA, "file browser: exporting entries=%d clipboard=%d", int(paths.size()), clipboard);
-    if (clipboard) {
-        QGuiApplication::clipboard()->setMimeData(mime);
-        m_status->setText(text("Selection copied. Paste it in your file manager."));
-    } else {
-        auto* drag = new QDrag(m_entries); drag->setMimeData(mime); drag->exec(Qt::CopyAction, Qt::CopyAction);
-    }
+    DEBUG_INFO(DEBUG_CATEGORY_MEDIA, "file browser: clipboard ready entries=%d", int(paths.size()));
+    QGuiApplication::clipboard()->setMimeData(mime);
+    m_status->setText(text("Selection copied. Paste it in your file manager."));
 }
 
 void MemberFileBrowser::exportFile(bool clipboard, const QString& destination) {
@@ -567,13 +564,14 @@ void MemberFileBrowser::exportFile(bool clipboard, const QString& destination) {
         m_status->setText(text("Cannot prepare a local copy")); return;
     }
     if (destination.isEmpty()) base += "/file-exports";
-    m_exportId = requestId(); m_exportResult.clear(); m_openAfter = false;
+    m_exportId = requestId(); m_openAfter = false;
+    auto result = std::make_shared<QStringList>();
     quint64 id = m_exportId;
     auto* batch = createBatch(MemberFileBatch::Download);
-    batch->finished = [this, batch, clipboard](bool ok, const QString& summary, const QStringList& roots) {
+    batch->finished = [this, batch, clipboard, result](bool ok, const QString& summary, const QStringList& roots) {
         m_batch = nullptr; m_exportId = 0; m_progress->hide(); m_uploadStatus->setText(summary);
-        m_exportResult = ok ? roots : QStringList(); batch->deleteLater(); updateActions();
-        if (ok && clipboard) publishExport(roots, true);
+        *result = ok ? roots : QStringList(); batch->deleteLater(); updateActions();
+        if (ok && clipboard) publishExport(roots);
         else m_status->setText(ok ? text("Local copy ready") : summary);
         emit exportFinished();
         if (m_closeAfterBatch) QTimer::singleShot(0, this, &QWidget::close);
@@ -583,16 +581,15 @@ void MemberFileBrowser::exportFile(bool clipboard, const QString& destination) {
     if (!clipboard && destination.isEmpty()) {
         QPointer<MemberFileBrowser> guard(this);
         auto* mime = new DeferredFileMimeData;
-        mime->localFiles = [guard, id] {
-            if (!guard) return QStringList();
-            if (guard->m_exportId == id) {
+        mime->localFiles = [guard, id, result] {
+            if (guard && guard->m_exportId == id) {
                 DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "file browser: drag waiting for batch id=%llu", (unsigned long long)id);
                 QEventLoop wait;
                 QObject::connect(guard, &MemberFileBrowser::exportFinished, &wait, &QEventLoop::quit);
                 QObject::connect(guard, &QObject::destroyed, &wait, &QEventLoop::quit);
                 wait.exec();
             }
-            return guard ? guard->m_exportResult : QStringList();
+            return *result;
         };
         auto* drag = new QDrag(m_entries); drag->setMimeData(mime); drag->setParent(QCoreApplication::instance());
         connect(this, &QObject::destroyed, drag, [] { QDrag::cancel(); });

tools/chatgui/src/member_files/browser.h

@@ -53,7 +53,7 @@ private:
     MemberFileBatch* createBatch(MemberFileBatch::Mode mode);
     void download(bool open);
     void exportFile(bool clipboard, const QString& destination = {});
-    void publishExport(const QStringList& paths, bool clipboard);
+    void publishExport(const QStringList& paths);
     bool startTransfer(const QString& remote, const QString& local, bool upload, const QByteArray& version);
     void mutate(uint8_t command);
     void cancel();
@@ -68,7 +68,6 @@ private:
     bool m_closeAfterBatch = false;
     quint64 m_dropId = 0;
     quint64 m_exportId = 0;
-    QStringList m_exportResult;
     int m_staleRetries = 0;
     QHash<quint64, uint8_t> m_actions;
     QComboBox* m_servers;