[Qt] QWebView fails to load first page with an Anchor

[Andy Nichols]

If when using QWebView::setUrl() for the first time the URL contains an anchor(ex. #something) then the QWebView will fail to update.  For example:

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWebView webView;
    webView.show();
    webView.setUrl(QUrl(QString::fromLatin1("http://doc.qt.nokia.com/4.7/qcombobox.html")));
    return a.exec();
}

will successfully update the view to display the page, while:

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWebView webView;
    webView.show();
    webView.setUrl(QUrl(QString::fromLatin1("http://doc.qt.nokia.com/4.7/qcombobox.html#itemDelegate")));
    return a.exec();
}

Will not update the webview at all.

Calling QWebView::load(QUrl(QString::fromLatin1("http://doc.qt.nokia.com/4.7/qcombobox.html#itemDelegate")));
does work however, but the inconsistency of behavior when using anchors with QWebView::setUrl(...) is cause for concernt.

Also not that the following also works:
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWebView webView;
    webView.show();
    webView.setUrl(QUrl(QString::fromLatin1("http://doc.qt.nokia.com/4.7/qcombobox.html#itemDelegate")));
    webView.setUrl(QUrl(QString::fromLatin1("http://doc.qt.nokia.com/4.7/qcombobox.html#itemDelegate")));
    return a.exec();
}

It is worth noting that in FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType type, PassRefPtr<FormState> prpFormState), WebCore/loader/FrameLoader.cpp:2077
if (shouldScrollToAnchor(isFormSubmission, policyChecker()->loadType(), newURL))
returns true for the first call to setUrl above
and false for the second.

Also, the Version of Webkit used is the one included with the Qt Master branch

[Benjamin Poulain]

Created attachment 84055 [details]
Test case code

[Aparna Nandyal]

This bug is same as https://bugs.webkit.org/show_bug.cgi?id=32723

The root cause of the problem is same in both cases, the calls to 

d->frame->loader()->activeDocumentLoader()->writer()->begin(absolute);
d->frame->loader()->activeDocumentLoader()->writer()->end();

in QWebFrame::setUrl is causing this problem. Im looking into another bug (https://bugs.webkit.org/show_bug.cgi?id=54380) that will possibly refactor this code.

[Benjamin Poulain]

*** This bug has been marked as a duplicate of bug 32723 ***