429318 - Vertical scrollbar overlapped by horizontal scrollbar in textarea in this case

Status: REOPENED

(Core :: Layout: Block and Inline, defect)

Description

[Martijn Wargers (dead)]

Attachment: testcase

See testcase, I see the vertical scrollbar being overlapped by the horizontal scrollbar in this case.
It might be only visbible for me in this testcase, because I use 'fat' scrollbars.

Comment 1

[Martijn Wargers (dead)]

Attachment: testcase

Comment 2

[Martijn Wargers (dead)]

Attachment: screenshot of what I see

Comment 3

[Boris Zbarsky [:bzbarsky]]

Is this not an issue for a <div style="overflow: scroll; white-space: pre"> with the same kids if it's styled to be the size the textarea is?

Comment 4

[Martijn Wargers (dead)]

No, at least I couldn't reproduce it with my testing, I used:
style="overflow: scroll; white-space: pre; height: 62px; border: 2px inset black;  display: inline-block; -moz-box-sizing: border-box; width: 195px;"
to try and reflect the textarea.

Comment 5

[Boris Zbarsky [:bzbarsky]]

Odd.  There's really nothing special about the textarea here.  I'm willing to bet this is a scrollframe issue.

Comment 6

[Martijn Wargers (dead)]

I probably suck at making a non-textarea testcase.

Comment 7

[Boris Zbarsky [:bzbarsky]]

What if you do "overflow: auto"?

Comment 8

[Martijn Wargers (dead)]

Attachment: testcase2

Gotcha. Indeed, it's also possible with a regular div (I didn't account for the font-size which seems smaller in textareas).

I can see the bug with the first div in this testcase.
I also added some divs with smaller widths, you might be able to reproduce this bug with those (for people who have normal scrollbars).

Comment 9

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This bug is marked with keyword regression, but I don't see any information about when it regressed.

Comment 10

[Martijn Wargers (dead)]

This regressed between 2007-12-04 and 2007-12-05:
http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2007-12-04+04&maxdate=2007-12-05+07&cvsroot=%2Fcvsroot
I guess a regression from bug 375304?

Comment 11

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Martijn, should we block on this? Did you see this problem in a real site?

Comment 12

[Martijn Wargers (dead)]

No, I didn't see this on a real site, I don't think we should block on this.

Comment 13

[Liviu Cirdei]

User Agent 	Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0
Build ID 	20160510030240

I can reproduce the issue on latest Nightly (49.0a1) using "testcase2" and having larger scrollbars (e.g 25 px). In the divs with smaller widths, the vertical scrollbar disapears.
I attached a screenshot showing the "testcase2" rendering on Nightly 49 with scrollbar having a size of 25px.

Comment 14

[Liviu Cirdei]

Attachment: Nightly 49 rendering with large scrollbar.bmp