570424 - <sub> should placed deeper; looks better and matches other browsers (CSS vertical-align: sub)

Status: UNCONFIRMED

(Core :: Layout, defect)

Description

[Lawrence Spector]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 GTB7.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 GTB7.0

The Summary says it all.

Reproducible: Always

Steps to Reproduce:
1. Write this HYML code: <P CLASS=center>log<SPAN CLASS=exp><SUB>10</SUB></SPAN>10,000 = 4.</P>
2.
3.
Actual Results:  
No subscript. Superscripts, <SUP>, are fine/

Expected Results:  
A subscript.

Your friends IE and Google Chrome do it right.

Comment 1

[j.j.]

Works fine for me. 
Have you an online example? 
Have you changed the browser's default font-size?

Comment 2

[j.j.]

Attachment: screenshot

This is what I get with Fx 3.6.3 on Win XP.
Is something wrong with that or have you different results?

(btw, we prefer public discussion here in the bug)

Comment 3

[j.j.]

OK, I see that other browser move the subscript deeper.
You can solve this easily. Just add something like this to your stylesheet:

sub { vertical-align: -0.4em }

Comment 4

[j.j.]

The URL is fixed now by adding  "sub {vertical-align:-0.6em}"

Changing summary and leaving this UNCONFIRMED.

Maybe someone is interested in changing the default of
  "vertical-align: sub;"
Indeed it is more visible in WebKit, Opera, IE.

Comment 6

[John Daggett (:jtd)]

(In reply to comment #0)
Lawrence, the subscript will vary based on the font used.  Could you put together a testcase that explicitly uses the font that causes the problem on your machine?  Is it a typical font or something only installed on your machine?

Comment 7

[j.j.]

Attachment: testcase, strict mode

This appears with common web fonts.
Lawrence's original reported URL uses Garamond, which is often not available and falls back to default font.

By creating this testcase I noticed that IE8 behaves different in strict mode (close to Firefox).

Comment 8

[Kevin Brosnan]

This might be the intended rendering. According to bug 227452 comment 2 screenshot ( https://bug227452.bugzilla.mozilla.org/attachment.cgi?id=142253 ). It looks to standardize on the rendering the same as your screenshot.

Comment 9

[Gordon P. Hemsley [:GPHemsley]]

I just made bug 225109 comment 14, which might be of interest/relevance to this discussion.