325940 - width of positioned element increases when links get focus

Status: VERIFIED FIXED

(Core :: Layout: Positioned, defect)

Description

[Stefan Weiss]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.1) Gecko/20060124 Firefox/1.5.0.1
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.1) Gecko/20060124 Firefox/1.5.0.1

A <div> in an HTML document is positioned with "position: absolute; width:auto", and contains another <div> that with "position:relative; width:100%", two links, and a <select> element. When one of the links gets focus, or when the selected option in the form element is changed, the width of the outer <div> increases, causing changes in the page layout.

I'm going to upload an self-contained example which demonstrates the effect.

Reproducible: Always

Steps to Reproduce:
1. Load attached example
2. Use <tab> to jump between the links.
 - OR -
   Click the links with the mouse.
 - OR -
   Change the selected <option> with mouse or keyboard.
Actual Results:  
The width of the #content div increases.

Expected Results:  
(no change in page layout)

The bug was reproduced on at least three different installations of FF 1.5, but I don't think that it was present in FF 1.0 (can't check that now though).

Comment 1

[Stefan Weiss]

Attachment: Self-contained test case

Comment 2

[Bill Gianopoulos [:WG9s]]

Confirming with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060124 Firefox/1.6a1 ID:2006012405

Comment 3

[Ria Klaassen (not reading all bugmail)]

Regression between 05-Dec-2004.07 and 06-Dec-2004.07.

Comment 4

[Bill Gianopoulos [:WG9s]]

Checkin for bug 201897 perhaps?

Comment 5

[:Gavin Sharp [email: [e-mail]]]

http://bonsai.mozilla.org/cvsquery.cgi?module=PhoenixTinderbox&date=explicit&mindate=2004-12-05+05%3A00&maxdate=2004-12-06+07%3A00

Comment 6

[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 after reflow branch landing

Comment 7

[Mats Palmgren (inactive)]

Bug occurs in SeaMonkey 2006120701 on Linux.
It does not occur in SeaMonkey 2006120801 on Linux.

-> FIXED (by reflow branch landing)

Comment 8

[Ryan VanderMeulen [:RyanVM]]

Adding in-testsuite? nomination per bz's request in m.d.t.l. Sorry for the bugspam.