W3C home > Mailing lists > Public > www-style@w3.org > July 2013

Re: Exposing CSS tokens to the platform

From: Brian Kardell <bkardell@gmail.com>
Date: Mon, 1 Jul 2013 15:13:38 -0400
Message-ID: <CADC=+jc+y-2aSdR2Nxn6wcOT3ZOXPJ7wiyYG9X+DomcNu26pmQ@mail.gmail.com>
To: Simon Sapin <simon.sapin@exyr.org>
Cc: "www-style@w3.org" <www-style@w3.org>, Jon Rimmer <jon.rimmer@gmail.com>, François REMY <francois.remy.dev@outlook.com>, "Tab Atkins Jr." <jackalmage@gmail.com>
On Mon, Jul 1, 2013 at 3:06 PM, Simon Sapin <simon.sapin@exyr.org> wrote:
> Le 01/07/2013 20:02, Brian Kardell a écrit :
>> We might considet exposing a non-lossy simple OM (not CSSOM, something
>> that could be parsed with JSON.parse) - I think that would be almost as
>> good.  CSS's forward compat grammar is really good and anything that
>> would change it maybe should be very managed.  I proposed this in 2011 i
>> think...
> Do you mean the Core Grammar defined in 2.1?
> http://www.w3.org/TR/CSS21/syndata.html#tokenization
> Syntax 3’s "component values" are a cleaned-up definition of the same thing.
> http://dev.w3.org/csswg/css-syntax/#component-value
> --
> Simon Sapin

Yes, I am saying the major skeleton of it as applies to parsing is
pretty well guarded and hardly changes... Hardly - but it does.

I think Tab's js parser does a serialization of component values - it
is actually a little unweildy, I think we can do slightly better than
that in terms of friendliness - but yeah, that's the gist... If you
could call something that would give you a kind of AST regardless of
whether the browser understood their actual details beyond parsing -
then 99% of ways you would rationally extend CSS could be accounted
for... What's more - most of it could be preprocessed if you wanted to
and you could use the JSON forms to do your actual extension which is
a lot more efficient anyway.

The remaining 1% of things you could change would also changing the
parser rules - and those are few and far between and potentially
dangerous, so maybe that's ok.

Brian Kardell :: @briankardell :: hitchjs.com
Received on Monday, 1 July 2013 19:14:07 UTC

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