1 files changed, 20 insertions, 1 deletions
diff --git a/src/ui/main_window/MainWindowSlotFunction.cpp b/src/ui/main_window/MainWindowSlotFunction.cpp
index e4038f66..95eb9871 100644
--- a/src/ui/main_window/MainWindowSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowSlotFunction.cpp
@@ -28,6 +28,7 @@
 
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/date_time/posix_time/posix_time_io.hpp>
+#include <cstddef>
 
 #include "MainWindow.h"
 #include "core/GpgConstants.h"
@@ -249,7 +250,25 @@ void MainWindow::upload_key_to_server() {
   dialog->SlotUpload();
 }
 
-void MainWindow::SlotOpenFile(QString& path) { edit_->SlotOpenFile(path); }
+void MainWindow::SlotOpenFile(const QString& path) {
+  QFileInfo const info(path);
+  if (!info.isFile() || !info.isReadable()) {
+    QMessageBox::critical(this, _("Error"),
+                          _("Cannot open this file. Please make sure that this "
+                            "is a regular file and it's readable."));
+    return;
+  }
+
+  if (info.size() > static_cast<qint64>(1024 * 1024)) {
+    QMessageBox::critical(
+        this, _("Error"),
+        _("Cannot open this file. The file is TOO LARGE (>1MB) for "
+          "GpgFrontend Text Editor."));
+    return;
+  }
+
+  edit_->SlotOpenFile(path);
+}
 
 void MainWindow::slot_version_upgrade_nofity() {
   SPDLOG_DEBUG(