302151 - horizontal scrollbars not shown with absolute positioned elements inside an overflow: auto element

Status: VERIFIED FIXED

(Core :: Layout, defect)

Description

[Adrian Yee]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b4) Gecko/20050725 Firefox/1.0+
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b4) Gecko/20050725 Firefox/1.0+

The test url contains 3 examples of absolute positioned elements which are
inside an element with overflow: auto.  For Deer Park, two of them do not show
the horizontal scrollbars when javascript is used to move the inner element
outside the initial are of the outer element.  It also does not show the
scrollbar if the inner element is resized to be bigger than the outer element.

Note that if the blue box is moved vertically, the vertical scrollbar shows up fine.

Reproducible: Always

Steps to Reproduce:
1. View the test case URL
2. For the 2nd example, click on the 'move me' link multiple times so that the
blue box moves outside the outer red one.
3. Do the same for the 3rd example.

The same can be done for the 'super size me' links.

Actual Results:  
A scrollbar shows up in the first example (correct) and no scrollbars are shown
in the 2nd and 3rd examples (wrong).

Expected Results:  
A horizontal scrollbar should up in all 3 cases when the inner blue box is
placed outside the area of the outer red box.

Comment 1

[Steve England [:stevee]]

Attachment: testcase from reporter's URL

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b4) Gecko/20050726
Firefox/1.0+ ID:2005072610
I see the behaviour described by the reporter.
IE6.0 adds scrollbars to the 2nd and 3rd examples in the testcase.

Comment 2

[Steve England [:stevee]]

Case 3 is a regression, but I'm not sure if that should be added to the
keywords, as case 1 and 2 are not regressions.

Comment 3

[Adrian Yee]

Just tested this again with:

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060124 Firefox/1.6a1

and the behaviour is still the same as in Firefox 1.5.  However, now the horizontal scrollbar in the first test does not work (ie. clicking on the arrows does nothing and dragging the scrollbar doesn't actually change the viewport).

Comment 4

[Adrian Yee]

Retested with:

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060504 Minefield/3.0a1

and all three cases correctly show the scrollbars.

However, it's still incorrect in the 1.8 branch:

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20060504 BonEcho/2.0a1

Comment 5

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

Can you test to find out exactly when it was fixed on trunk?

Comment 6

[Adrian Yee]

Where can you download the nightly builds which are older than April 15th?  That's the oldest that's on the osuosl.org mirror.  It was fixed before that build since it's okay in:

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060415 Firefox/3.0a1

Comment 7

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

http://archive.mozilla.org/pub/firefox/nightly/

Comment 8

[Adrian Yee]

Thanks.  It looks like it was fixed in the 20060316 trunk build.  In particular, I think it was dbaron's scrolling changes for bug 192767 that also fixed this problem.

Comment 9

[Peter van der Woude [:Peter6]]

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20061208 Minefield/3.0a1 ID:2006120812 [cairo]

Seems fixed by reflow branch landing

Comment 10

[Peter van der Woude [:Peter6]]

this one has nothing to do with the reflow landing (my bad)
It works fine before and after it.

resolving based on comment #8