773436 - Mobile Wikipedia reference div does not appear if page is zoomed

Status: RESOLVED INVALID

(Firefox for Android Graveyard :: Toolbar, defect)

Description

[Michael Comella (:mcomella) [NI reported issues only: ex-Mozilla]]

Attachment: Slight zoom, cut-off div

1) Open Firefox for Android (preferably 14 - 15, standard - aurora, due to bug 773427).
2) Click the URL bar and navigate to http://en.m.wikipedia.org/wiki/Real+. Make sure you are not redirected to the desktop site.
3) Scroll to the first reference link (appears as "[1]", in a blue clickable link).
4) Zoom in to the page (two finger pinch out), keeping the reference link on the screen.
5) Click the link.

Expected: The reference div slides into place at the bottom of the screen.
Actual: Nothing happens.

It seems the div draws in the unzoomed viewport – if you zoom into very slightly, it will be cut off. See the attached photo.

Comment 1

[Michael Comella (:mcomella) [NI reported issues only: ex-Mozilla]]

Changed title to be consistent with other recently filed bugs. Added these bugs to see also list as they also deal with mobile Wikipedia reference divs.

Note on the link above, the "+" is not added automatically by Bugzilla – you have to add it by hand.

Comment 2

[Michael Comella (:mcomella) [NI reported issues only: ex-Mozilla]]

Attachment: Unzoomed, full div

Comment 3

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

The div is position:absolute, I don't know what our code is supposed to be doing in this case. CC'ing Cwiiis who knows about this stuff :)

Comment 4

[Chris Lord [:cwiiis]]

(In reply to Kartikaya Gupta (:kats) from comment #3)
> The div is position:absolute, I don't know what our code is supposed to be
> doing in this case. CC'ing Cwiiis who knows about this stuff :)

As this is position:absolute, this is expected - absolutely positioned divs layout with respect to absolute page coordinates. If it was position:fixed with bottom:0 and width: 100%, this is more likely to do what I imagine is expected.

As it is, I guess this is invalid? (i.e. no bug here)

Comment 5

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

Sounds reasonable to me. If it's really a problem we should move this bug to evangelism and get wikipedia to change it from position:absolute to position:fixed.

Comment 6

[Chris Lord [:cwiiis]]

tbh, I'm surprised they haven't added the viewport tag to disable zooming - there's no reason to allow it given that page layout. It's quite hard to consistently position a bottom-bar and allow free zooming on a mobile page.

Comment 7

[Michael Comella (:mcomella) [NI reported issues only: ex-Mozilla]]

Posted a bug to Wikimedia's bug tracker: (https://bugzilla.wikimedia.org/show_bug.cgi?id=38647)