131719 - native scrollbars not disabled in xul-based browser (was: Text entry fiels grows extraneous scrollbars)

Status: NEW

(Core :: XUL, defect)

Description

[Stanislav Malyshev]

When a long text is entered into text input field, sometimes on the field appear
extraneous and very ugly scrollbars, which also block the field completely. See
the URL:
http://www.google.com/search?hl=en&ie=ISO-8859-1&oe=ISO-8859-1&q=some+rather+long+quesry+to+test+Mozilla+function
for example, it shows the picture I'll attach.

Comment 1

[Stanislav Malyshev]

Attachment: screenshot of the bug happening - both text field and URL field

Comment 2

[Boris Zbarsky [:bzbarsky]]

Worksforme, linux build 2002-03-18-06.  Does this happen with all themes?  Or
just some themes?

Comment 3

[John Morrison]

Ah, Moriarty ... we meet again.

This is bug 42273. Look in your prefs.js file in your profile directory (under
~/.mozilla somewhere). You should see a line like this:

  user_pref("nglayout.widget.gfxscrollbars", false);

Shut down the browser, remove that line, and then start again. Your problem 
should be fixed. (I guess that you must have flipped that on in a very old 
(ca. 2000) build, since the UI for setting that pref was removed long ago).

The use of native scrollbars is not supported in a xul-based mozilla (although
embedded apps may implement this differently).

In bug 44576, the effect of this pref was forced to be disabled (in
nsCSSFrameConstructor.cpp). However, pinkerton (for good reason) restored 
the effect of this pref, so that you can use native scrollbars again.

I suppose we need a little more robust way of disabling native scrollbars in
mozilla, while still allowing embeddors to make use of native implementations
(e.g., perhaps a build time flag?).

Nominate nsbeta1/mozilla1.0 since the consequence of allowing this pref to 
have effect in a xul browser is that the browser becomes (close to) unusable.
(this is also reproducible on win32 and likely mac).

Comment 4

[jag (Peter Annema)]

Either turn it off at build time (shouldn't be hard) or use a new pref.

Comment 5

[Stanislav Malyshev]

Happens with Modern theme. Actually, I see it right now when looking on this bug
- fields URL and Summary have those ugly scrolls. GTK version
gtk+-1.2.10-ximian.21, if this helps, GTK theme marble3D. Happens with Classic
theme too.

Comment 6

[John Morrison]

Could you just confirm that the following line is set in your prefs.js file
in your profile?

   user_pref("nglayout.widget.gfxscrollbars", false);

Comment 7

[Stanislav Malyshev]

Yes, removing this line seems to have fixed the problem. Thanks.

Comment 8

[Peter Trudelle]

nsbeta1- per Nav triage team.