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Re: Issue 118 (Was: [CSS21] Issues with inline formatting model (particularly 10.8))

From: Bert Bos <bert@w3.org>
Date: Fri, 20 Aug 2010 18:41:25 +0200
To: www-style@w3.org
Message-Id: <201008201841.25218.bert@w3.org>
On Thursday 19 August 2010 22:48:03 Bert Bos wrote:
> On Monday 26 July 2010 23:53:13 Anton Prowse wrote:
> > Bert Bos wrote:
> > > I have an action item to write text for issue 118[1]. Here it is:
[...]

A thought, maybe something for level 3:

This (i.e., the omitted text above) seems to be handled correctly by 
Opera and Safari (except that they don't use sTypoAscender but some 
other metric from OpenType fonts).

But Firefox does something subtly different. It seems to take the A and 
D always from the first available font, even if the glyph comes from a 
fallback font. That is somewhat dangerous, because it may cause 
overlap, but in practice that is rarely a problem; and it does ensure a 
constant distance between baselines where it matters, such as in 
side-by-side texts in different languages.

Maybe this should be an option in CSS3? A keyword on the 
proposed 'line-box-contain' property or on 'line-height' itself?

> [1] http://wiki.csswg.org/spec/css2.1#issue-118



Bert
-- 
  Bert Bos                                ( W 3 C ) http://www.w3.org/
  http://www.w3.org/people/bos                               W3C/ERCIM
  bert@w3.org                             2004 Rt des Lucioles / BP 93
  +33 (0)4 92 38 76 92            06902 Sophia Antipolis Cedex, France
Received on Friday, 20 August 2010 16:41:53 GMT

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