We need to clear selection when we switch message (it's an qtwebengine bug)

messageviewer/src/viewer/viewer.cpp

@@ -251,8 +251,7 @@ void Viewer::slotScrollNext()
 QString Viewer::selectedText() const
 {
     Q_D(const Viewer);
-    QString temp = d->mViewer->selectedText();
-    return temp;
+    return d->mViewer->selectedText();
 }
 
 Viewer::DisplayFormatMessage Viewer::displayFormatMessageOverwrite() const

messageviewer/src/viewer/viewer_p.cpp

@@ -1290,6 +1290,9 @@ void ViewerPrivate::printPreviewMessage(const Akonadi::Item &message)
 
 void ViewerPrivate::resetStateForNewMessage()
 {
+#ifdef MESSAGEVIEWER_USE_QTWEBENGINE
+    mViewer->clearSelection();
+#endif
     mClickedUrl.clear();
     mImageUrl.clear();
     enableMessageDisplay(); // just to make sure it's on

messageviewer/src/viewer/webengine/mailwebenginescript.cpp

@@ -80,3 +80,4 @@ QString MailWebEngineScript::toggleFullAddressList(const QString &field, const Q
     qDebug() << "QString MailWebEngineScript::injectAttachments(const QString &delayedHtml, const QString &elementStr) :" << source;
     return source;
 }
+

messageviewer/src/viewer/webengine/mailwebengineview.cpp

@@ -267,6 +267,11 @@ void MailWebEngineView::toggleFullAddressList(const QString &field, const boost:
     page()->runJavaScript(MessageViewer::MailWebEngineScript::replaceInnerHtml(field, html, doShow), invoke(this, &MailWebEngineView::updateToggleFullAddressList));
 }
 
+void MailWebEngineView::clearSelection()
+{
+    page()->runJavaScript(WebEngineViewer::WebEngineScript::clearSelection());
+}
+
 void MailWebEngineView::updateToggleFullAddressList(const QVariant &result)
 {
     //qDebug() << " result" << result;

messageviewer/src/viewer/webengine/mailwebengineview.h

@@ -64,6 +64,7 @@ public:
     QList<QAction *> interceptorUrlActions(const WebEngineViewer::WebHitTestResult &result) const;
     void toggleFullAddressList(const QString &field, const boost::function<QString()> &delayedHtml, bool doShow);
 
+    void clearSelection();
 public Q_SLOTS:
     void slotZoomChanged(qreal zoom);
     void slotShowDetails();

webengineviewer/src/webenginescript.cpp

@@ -189,3 +189,11 @@ QString WebEngineScript::scrollToRelativePosition(int pos)
     const QString source = QString::fromLatin1("window.scrollTo(window.scrollX, %1); [window.scrollX, window.scrollY];").arg(pos);
     return source;
 }
+
+QString WebEngineScript::clearSelection()
+{
+    const QString source = QString::fromLatin1("if(\"document.selection\") {"
+                                               "   document.selection.clear ();"
+                                               "};");
+    return source;
+}

webengineviewer/src/webenginescript.h

@@ -38,6 +38,7 @@ WEBENGINEVIEWER_EXPORT QString scrollUp(int pixel);
 WEBENGINEVIEWER_EXPORT QString scrollPercentage(int percent);
 WEBENGINEVIEWER_EXPORT QString scrollToRelativePosition(int pos);
 WEBENGINEVIEWER_EXPORT QString removeStyleToElement(const QString &element);
+WEBENGINEVIEWER_EXPORT QString clearSelection();
 }
 }
 #endif // WEBENGINESCRIPT_H