Skipping thumbnail caching for encrypted storages

thumbnail/thumbnail.cpp

@@ -690,9 +690,16 @@ bool ThumbnailProtocol::createSubThumbnail(QImage &thumbnail, const QString &fil
         if (subCreator && subCreator->create(filePath, cacheSize, cacheSize, thumbnail)) {
             scaleDownImage(thumbnail, cacheSize, cacheSize);
 
-            // The thumbnail has been created successfully. Store the thumbnail
-            // to the cache for future access.
+            // The thumbnail has been created successfully. Check if we can store
+            // the thumbnail to the cache for future access.
+#if KIO_VERSION >= QT_VERSION_CHECK(5, 83, 0)
+            if (metaData("cache").toInt()) {
+#else
+            {
+#endif
+                // Save the cache
                 QSaveFile thumbnailfile(thumbPath.absoluteFilePath(thumbName));
+
                 if (thumbnailfile.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
                     QFileInfo fi(filePath);
                     thumbnail.setText(QStringLiteral("Thumb::URI"), QString::fromUtf8(fileUrl));
@@ -703,6 +710,8 @@ bool ThumbnailProtocol::createSubThumbnail(QImage &thumbnail, const QString &fil
                         thumbnailfile.commit();
                     }
                 }
+            }
+
         } else {
             return false;
         }