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Issue metadata

Status:	Available
Owner:	----
Cc:	jianli@chromium.org rbyers@chromium.org pinkerton@chromium.org esprehn@chromium.org foolip@chromium.org bokan@chromium.org
Components:	UI>Browser
EstimatedDays:	----
NextAction:	----
OS:	Mac
Pri:	3
Type:	Bug
Needs-Feedback

position fixed elements flicker when hiding/showing top toolbars

Project Member Reported by ojan@chromium.org, Apr 23 2016

Issue description

What steps will reproduce the problem?
1. Load http://jsbin.com/topicehuse
2. Enter fullscreen (cmd+ctrl+f)
3. Toggle the top toolbars (cmd+shift+f)

Notice how the blue element at the bottom moves around. It should be static at the bottom. Doing the same on Safari doesn't have an flicker.

I don't know if we have the top toolbar / fullscreen behavior on other platforms, so this might be Mac only.

I'm not really sure who owns fullscreen and whether this has more to do with fullscreen, position:fixed or window reaize. I'm not really sure what component to put this in.

FWIW, I noticed this on real content (Google Inbox in this case).

Comment 1 by ojan@chromium.org, Apr 23 2016

My guess is that this problem is that we're repositioning the web contents async from resizing. So, it's probably mac-specifc code that's the problem.

Comment 2 by ojan@chromium.org, Apr 23 2016

Cc: pinkerton@chromium.org

Comment 3 by jianli@chromium.org, Apr 25 2016

Components: -Blink Blink>Layout
Labels: OS-Linux OS-Windows

Could also repro this on Windows and Linux.

Comment 4 by e...@chromium.org, Apr 27 2016

Cc: jianli@chromium.org
Labels: Needs-Feedback

I fail to reproduce this on either Linux or Windows and currently do not have access to a Mac. jianli, would you mind explaining the steps required to reproduce this on Linux? Toggling fullscreen doesn't trigger it and there is no top toolbars to toggle...

Comment 5 by pinkerton@chromium.org, Apr 27 2016

Owner: spqc...@chromium.org
Status: Assigned (was: Untriaged)

-> spqchan for mac fullscreen issue. Seems unlikely this will be the same on win/linux.

Comment 6 by spqc...@chromium.org, Apr 28 2016

Removing Windows and Linux

This should be Mac only since toggling toolbars should only be available to that platform.

I suspect this is happening because the logic in mac is sending multiple resize messages when the toolbar is relayout.