1187616 - Page does not be repainted properly when toggle sidebar

Status: RESOLVED FIXED

(Core :: Panning and Zooming, defect)

Description

[Alice0775 White]

Attachment: screenshot comparison between Nightly 2015-07-25 and 2015-07-24

Build Identifier:
https://hg.mozilla.org/mozilla-central/rev/d3228c82badd
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 ID:20150725030209


Steps to reproduce:

1. Open http://www.so-net.ne.jp/
2. Open Sidebar (Ctrl+B)
3. Shrink browser window width to approx 1070px so that horizontal scrollbar appears
4. Scroll to right by drag horizontal scrollbar
5. Close Sidebar


Actual Results:
Page does not placed in center.
Scroll in vertically little bit, then Page will be in center.

Expected Results:
Page should be in center

Comment 1

[Alice0775 White]

I can reproduce on any web page such as https://bugzilla.mozilla.org/show_bug.cgi?id=1187616

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Thanks, I can reproduce this on OS X as well. It probably affects all platforms; and the root cause is probably the same as bug 1187373 comment 1 (we're not clamping the scroll position properly in APZ after stuff changes).

Comment 3

[Alice0775 White]

Regression window( with force apz enabled ):
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=49ae0961591e&tochange=fee45cd9a4d9

Regressed by: Bug 1178847

Comment 4

[Kartikaya Gupta (email:[e-mail])]

The patch on bug 1187792 fixes this also.

Comment 5

[Kartikaya Gupta (email:[e-mail])]

Marking fixed by bug 1187792; please reopen if you still see this happening.