46112 - Overflow: hidden not working correctly on Linux

Status: RESOLVED WORKSFORME

(Core :: CSS Parsing and Computation, defect, P3)

Description

[Christine Hoffman]

Using the following builds:
Win: 7_20_08
Mac: 7_19_12
Linux: 7_21_08
Open the attached file. Textarea is contained in a div which has an 'Overflow' 
value of 'hidden'. 

Expected result: Areas outside designated height and width should be clipped. 

Actual result: Windows and Mac display correctly. On Linux, there is some 
remaining part of the scrollbar still displaying.

Comment 1

[Christine Hoffman]

Attachment: HTML file to demonstrate problem

Comment 2

[Christine Hoffman]

Changed component from HTML element to Style. Assigned engineer may need to be 
changed as well.

Comment 3

[Marc Attinasi]

waqar, kmcclusk said you would be the guy to look into this...

Comment 4

[waqar]

This bug has been marked "future" because the original netscape engineer working
on this is over-burdened. If you feel this is an error, that you or another
known resource will be working on this bug,or if it blocks your work in some way
-- please attach your concern to the bug for reconsideration.

Comment 5

[Geraint]

I have a different manifestation of this bug - or is it a new bug?

See test case at http://www.copyn.plus.com/mozTest9.html

Here the image is contained within 2 DIV elements.  The inner has
overflow:hidden.  In this case the Image overspills both DIVs.

Compare this to http://www.copyn.plus.com/mozTest10.html where both DIVs have
overflow:hidden.

In this case the Image is correctly clipped.

It is as though the overflow settings do not 'bubble-up' correctly unless
explicitly set.

This behaviour is seen in Linux Moz0.7 and Windows NT using Netscape6.0.

Since bug wrises in my work-around for bug 63605 I would request that this bug
be re-opened or tied in to 63605.

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Does this bug, as originally reported, still exist?

Comment 7

[Geraint]

The symptoms described in the first test case are still there for Moz0.7 in
Linux but appear fine under Windows NT.  Note that my test cases fail under
Windows NT and Linux.

Comment 8

[Hixie (not reading bugmail)]

Netscape's standard compliance QA team reorganised itself once again, so taking 
remaining non-tables style bugs. Sorry about the spam. I tried to get this done 
directly at the database level, but apparently that is "not easy because of the 
shadow db", "plus it screws up the audit trail", so no can do...

Comment 9

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Mozilla's behavior in http://www.copyn.plus.com/mozTest9.html is correct (at
least as of build 2001032405).

The inner DIV is large enough to contain the image, so the fact that it's
"overflow: hidden" is irrelevant. The inner DIV and the image both spill out of
the outer DIV because the outer DIV has "overflow: visible" (the default). No
clipping should occur in this test case.

The original bug filed here is gone too. The textarea is indeed clipped in
Linux. There is a repainting problem, however; the part of the textarea that is
not initially visible often fails to be updated when it is selected after having
been scrolled into view. This should be filed as a separate bug.