174830 - Background images in textareas are set as "fixed" by default

Status: NEW

(Core :: Layout: Form Controls, defect, P3)

Description

[Mark Slater]

User-Agent:       Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2b) Gecko/20021015
Build Identifier: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2b) Gecko/20021015

In textareas, the background image set by inline styles (eg,
background-image:url()) seems to be set to "fixed" by default. Not quite sure if
 this is the correct behaviour. See the URL above and scroll the textarea. 

Reproducible: Always

Steps to Reproduce:
1. Go to URL
Actual Results:  
CSS backgrounds are set as "fixed" by default

Expected Results:  
The background should follow the scrolling when the textarea is scrolled

Comment 1

[Boris Zbarsky [:bzbarsky]]

I suspect the problem here is that what's scrolling is the anonymous stuff
inside the <textarea> and not the <textarea> itself....

Comment 2

[John Keiser (jkeiser)]

I wonder if it's possible to make PlaintextEditor work with the actual textarea
element ... this may or may not be big to fix but it'll be a while before I want
to mess with it.

Comment 3

[Rick Ju]

i can't see what png background is displayed( the only diplayed png is the
relative pos img ). we should say the problem is that textarea don't support img
background.

Comment 4

[John Keiser (jkeiser)]

Rick: I see a background in the textarea on WinXP 2002120608 and today's build.

Comment 5

[Rick Ju]

i tried 1.2.1 on linux. so that's another bug?

(I tried on windows version just now and can see the background img too)

Comment 6

[John Keiser (jkeiser)]

Might be a bug in 1.2.1 ... or a bug on Linux.  Please file a different bug on
that, if it's a Linux problem.

Comment 7

[Boris Zbarsky [:bzbarsky]]

background worksforme, linux trunk build 2002-12-09-22 (in that it appears, not
in that it scrolls right).

Comment 8

[Rick Ju]

now i can't reproduce it on 1.2.1 for linux also. i guess in most cases it's
because that last time i was testing it using a preference that "ignoring the
colors and background imgs specified" since i alway liked to check such options.
so sorry and pls just ignore my comments now. if i catch it again, i will
commment again

Comment 9

[Boris Zbarsky [:bzbarsky]]

The more I think about it, the more I think that this is the right behavior,
really.... (since the textarea itself is just a replaced element and it's not
going anywhere).

Comment 10

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

so how would you make it scroll with the textarea?

Comment 11

[Boris Zbarsky [:bzbarsky]]

You wouldn't.

Comment 12

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

Why do we allow authors to style colors / backgrounds in textareas in the first
place? :-)

Comment 13

[Boris Zbarsky [:bzbarsky]]

Backgrounds, because replaced elements support that in general (eg you can put a
background on an image, and if it has opacity that will work).

Colors, because someone thought that would be a good idea.... and with the
styling of backgrounds, maybe it is.

Comment 14

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

If you could apply style to the block inside the textarea, you could set its
background and it would scroll.