861174 - Transition calculated erroneously when scrollbars are present

Status: VERIFIED FIXED

(Core :: CSS Parsing and Computation, defect)

Description

[Max Jonas Werner [:Makkes]]

Attachment: transition.html

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130329030832

Steps to reproduce:

I built a simple test page to reproduce the bug:

1. Open the page in Firefox. Be sure to make the window small enough so that a vertical scroll bar is shown on the right.
2. Click on the red square
3. Click on the red square again


Actual results:

The DIV on the right is shown but not completely, some part is covered by the browser scroll bar. When you look at the computed style you'll see that the CSS property "right" is set to "-263px" after first click and to "-13px" after the second click despite the fact that the CSS definitions mandate setting "right" to "-250px" and "0" respectively.


Expected results:

The DIV should be completely visible after the second click.

Comment 1

[Paul Silaghi, QA [:pauly]]

I confirm this on nightly 23.0a1 (2013-04-11) Win 7 x64.

Comment 2

[Alice0775 White]

Regression window(m-c)
Good:
http://hg.mozilla.org/mozilla-central/rev/c29b842c4159
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120606221720
Bad:
http://hg.mozilla.org/mozilla-central/rev/3933384d8315
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120607023619
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c29b842c4159&tochange=3933384d8315



Regression window(m-i)
Good:
http://hg.mozilla.org/integration/mozilla-inbound/rev/f5a441d6929f
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120605210720
Bad:
http://hg.mozilla.org/integration/mozilla-inbound/rev/df6702c41ddd
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120605215419
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=f5a441d6929f&tochange=df6702c41ddd

Triggered by:
 Bug 157681

Comment 3

[(mostly gone) XtC4UaLL [:xtc4uall]]

Sounds like Bug 844178 indeed.

Comment 4

[Max Jonas Werner [:Makkes]]

I just fetched the fix for Bug 844178 from m-c and built Firefox. This bug doesn't appear on that build anymore. So it's most probably resolved IMHO.

Comment 5

[Paul Silaghi, QA [:pauly]]

I'll give it a try as soon as the today's nightly comes out.

Comment 6

[Paul Silaghi, QA [:pauly]]

I confirm it's fixed in 23.0a1 (2013-04-25) by bug 844178.
Thanks for the notice Max.