show JS alerts in a better way

src/librssguard/gui/webviewers/webengine/webengineviewer.h

@@ -52,7 +52,6 @@ class RSSGUARD_DLLSPEC WebEngineViewer : public QWebEngineView, public WebViewer
 
   protected:
     virtual ContextMenuData provideContextMenuData(QContextMenuEvent* event) const;
-
     virtual QWebEngineView* createWindow(QWebEnginePage::WebWindowType type);
     virtual void contextMenuEvent(QContextMenuEvent* event);
     virtual bool event(QEvent* event);

src/librssguard/network-web/webengine/webenginepage.cpp

@@ -71,6 +71,13 @@ void WebEnginePage::hideUnwantedElements() {
   }
 }
 
+void WebEnginePage::javaScriptAlert(const QUrl& security_origin, const QString& msg) {
+  qApp
+    ->showGuiMessage(Notification::Event::GeneralEvent,
+                     GuiMessage(tr("Website alert"),
+                                tr("URL %1 reports this important message: %2").arg(security_origin.toString(), msg)));
+}
+
 bool WebEnginePage::acceptNavigationRequest(const QUrl& url, NavigationType type, bool is_main_frame) {
   if (type == NavigationType::NavigationTypeLinkClicked) {
     bool open_externally_now =

src/librssguard/network-web/webengine/webenginepage.h

@@ -25,6 +25,7 @@ class WebEnginePage : public QWebEnginePage {
     void hideUnwantedElements();
 
   protected:
+    virtual void javaScriptAlert(const QUrl& security_origin, const QString& msg);
     virtual bool acceptNavigationRequest(const QUrl& url, NavigationType type, bool is_main_frame);
     virtual void javaScriptConsoleMessage(JavaScriptConsoleMessageLevel level,
                                           const QString& message,