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Re: [css-text-decor-3] drop 'text-underline-position: alphabetic'

From: L. David Baron <dbaron@dbaron.org>
Date: Tue, 7 May 2013 00:42:05 -0700
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style@w3.org
Message-ID: <20130507074205.GB13683@crum.dbaron.org>
On Monday 2013-05-06 17:37 -0700, fantasai wrote:
> On 03/24/2013 08:58 PM, L. David Baron wrote:
> >It's also not clear to me what the use cases for the 'alphabetic'
> >value are.  I believe the current behavior (using font metrics)
> >generally produces good results, and when it doesn't, that's the
> >fault of the font.  If there is a particular behavior that is in
> >general more desirable than using font metrics, the specification
> >should require that behavior.  If there are a particular set of
> >languages that require this value, that should be explained in the
> >specification (and I'd be willing to reconsider this proposal).  But
> >barring those, I think the 'alphabetic' value should be dropped.
> I think it's okay for 'alphabetic' to mean "use the font metrics that
> are supposedly indicating an alphabetic underline regardless of whether
> they are reasonable". Clarified that in the spec.

I'd like an implementor with substantial knowledge of font metrics
to confirm that this is sensible.

It's still not clear to me what the use case for 'alphabetic' is
other than a convenience for the spec writer to explain the behavior
that 'auto' often is (i.e., roughly when CJK isn't involved).


𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂
Received on Tuesday, 7 May 2013 07:42:28 UTC

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