Browse: webkit spawns multiple scrollbars in some google apps

[greenfeld]

On some webpages (such as news.google.com) Browse will show the Sugar-style scrollbar, as well as an additional scrollbar immediately to the left of the first one.

This has been seen on XO-1.5 and XO-1.75 with OLPC 12.1.0 os8. Also seen in Epiphany, so it's a WebKit issue.

[manuq]

This seems very specific to google apps, I can see it in plus and news. Setting as minor bug and posponing to 0.98.

[manuq]

Same happens in Epiphany, screenshot attached.

[manuq]

Added a ticket in Epiphany bug tracker:  https://bugzilla.gnome.org/show_bug.cgi?id=676982

[dsd]

The scrolled window (with the main scroll bars) is owned by Browse, and the google-specific scroll bars are owned by WebKit. There needs to be some communication between the two so that Browse hides its scroll bars when necessary.

Have we tried working with this API?
 http://webkitgtk.org/reference/webkitgtk/stable/WebKitWebWindowFeatures.html#WebKitWebWindowFeatures.description

[humitos]

Replying to dsd:

Have we tried working with this API?

I've just tried this:

window_features = self.get_window_features()
window_features.connect('notify::scrollbar-visible',
                        self.__scrollbar_visible_cb)
window_features.connect('notify::statusbar-visible',
                        self.__scrollbar_visible_cb)
window_features.connect('notify::toolbar-visible',
                        self.__scrollbar_visible_cb)
window_features.connect('notify::menubar-visible',
                        self.__scrollbar_visible_cb)
window_features.connect('notify::locationbar-visible',
                        self.__scrollbar_visible_cb)
self.props.window_features = window_features

but those signals are not emitted when I go to  http://news.google.com for example, and that page shows its own scrollbar + Browse's Activity one.

[humitos]

This email says that gmail does some tricks with the scrollbars and that is why we are having this issue. I'm not sure how to solve it yet and actually I don't know if it there is a solution.

 http://www.mail-archive.com/webkit-gtk@lists.webkit.org/msg00504.html

In the same email this guy talks about 'frame-flattening':

 http://webkitgtk.org/reference/webkitgtk/stable/WebKitWebSettings.html#WebKitWebSettings--enable-frame-flattening