do not show editor widget if file load fails

mainwindow.cpp

@@ -153,16 +153,18 @@ void MainWindow::createOrOpenEditor(NamedFile &file) {
     } else {
         // new editor for this file
         editor = new EditorWidget(file);
-        ui->tabWidget->addTab(editor, file.name);
-        ui->tabWidget->setCurrentWidget(editor);
-        editor->load();
-        connect(editor->document(), SIGNAL(modificationChanged(bool)), this, SLOT(markDirty(bool)));
-        connect(editor, SIGNAL(undoAvailable(bool)), ui->actionUndo, SLOT(setEnabled(bool)));
-        connect(editor, SIGNAL(redoAvailable(bool)), ui->actionRedo, SLOT(setEnabled(bool)));
-        connect(editor, SIGNAL(copyAvailable(bool)), ui->actionCut, SLOT(setEnabled(bool)));
-        connect(editor, SIGNAL(copyAvailable(bool)), ui->actionCopy, SLOT(setEnabled(bool)));
-        // add to project list as open file
-        projectList.currentProject().openFile(file.path);
+        if (editor->load()) {
+            ui->tabWidget->addTab(editor, file.name);
+            ui->tabWidget->setCurrentWidget(editor);
+            connect(editor->document(), SIGNAL(modificationChanged(bool)), this,
+                    SLOT(markDirty(bool)));
+            connect(editor, SIGNAL(undoAvailable(bool)), ui->actionUndo, SLOT(setEnabled(bool)));
+            connect(editor, SIGNAL(redoAvailable(bool)), ui->actionRedo, SLOT(setEnabled(bool)));
+            connect(editor, SIGNAL(copyAvailable(bool)), ui->actionCut, SLOT(setEnabled(bool)));
+            connect(editor, SIGNAL(copyAvailable(bool)), ui->actionCopy, SLOT(setEnabled(bool)));
+            // add to project list as open file
+            projectList.currentProject().openFile(file.path);
+        }
     }
     selectedFolder = nullptr;
     enableFileActions(editor);