193534 - disabled <SELECT> can still be scrolled

Status: REOPENED

(Core :: Layout: Form Controls, defect)

Description

[Peter Maly]

User-Agent:       Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.2.1) Gecko/20021130

I think this is a bug, some may think this is evangalism, but I noticed Mozilla
handles <select disabled> in what I would consider a strange way, and definitely
different from IE.  When the listbox is disabled, you cannot make any
selections, BUT you can scroll through it.  I think this is a bad idea because:

a) it is supposed to be disabled -> DISABLED should mean disabled in all ways.

b) Completely disabling any widget allows a developer to completely take control
over it and utilize it to his/her own needs.  For example at one point I wanted
to have two listboxes side by side always being in synch with each other.  So I
disabled both of them, and wrote javascript code to scroll up and down through
both listboxes in sync.  Works great in IE and Mozilla, BUT because Mozilla
allows scrolling through a listbox even when it's disabled, sync can be
potentially lost.



Reproducible: Always

Steps to Reproduce:
All this is Mozilla's handling of disabled in <select>.  All you need to do is
create a listbox with enough entries so that it scrolls.
Actual Results:  
see details

Expected Results:  
should handle it like IE does

Comment 1

[Chris Casciano]

Peter, do you know of a site that uses this or have a testcase already?

Comment 2

[Josh Birnbaum]

Attachment: testcase

Comment 3

[Josh Birnbaum]

confirmed with Moz 1.3b on WinXP.

over to Form Controls

Comment 4

[Chris Casciano]

-> All/All (1.4b OS X)

Looking at the testcase however I'm not sure I agree with the initial
presumption that disabled should mean that one can't see all the options and not
just that you can't select any options. 

Comment 5

[Anne (:annevk)]

I would vote for WONTFIX. The behavior of Mozilla is better.

Comment 6

[Boris Zbarsky [:bzbarsky]]

Anne, this is sort of the module owners call.

ccing some ui people too, for their feedback.

Comment 7

[Mike Connor [:mconnor]]

Since single select dropdowns don't let you view the options (the dropdown is
disabled), its rather inconsistent to act differently for multiple selects, IMO.

Comment 8

[Boris Zbarsky [:bzbarsky]]

As second question is whether there is a way to disable a XUL scrollbar (which
is what we have here).

Comment 9

[[e-mail]]

Currently I don't know of way to stop a XUL scrollbar from attempting to scroll
except by setting its maxpos to 0 (which also locks the curpos to 0).

Note that you would also have to disable mousewheel scrolling.

Also note that this bug also affects textareas.

Comment 12

[Jonathan Watt [:jwatt]]

Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)