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Re: Question on parsing of "font" property

From: Andrew Fedoniouk <news@terrainformatica.com>
Date: Wed, 19 May 2004 15:31:02 -0700
Message-ID: <006401c43df0$f8164170$1902000a@AFedoniouk>
To: "Ian Hickson" <ian@hixie.ch>
Cc: "Boris Zbarsky" <bzbarsky@MIT.EDU>, <www-style@w3.org>

> Where did IDENT come from?

http://www.w3.org/TR/CSS21/grammar.html#q2

> The spec specifically says that any valid CSS
> construct is allowed, including blocks, etc.

I am trying to follow formal language. I shouldn't?
And I did not find the "block" definition.
Sorry, what is this?

Andrew Fedoniouk.
http://terrainformatica.com




> On Wed, 19 May 2004, Andrew Fedoniouk wrote:
> >
> > declaration
> >   : property ':' S* expr prio?
> >   | /* empty */
> >   ;
> > expr
> >   : term [ operator term ]*
> >   ;
> > term
> >   : unary_operator?
> >     [ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* | ANGLE S*
|
> >       TIME S* | FREQ S* | function ]
> >   | STRING S* | IDENT S* | URI S* | hexcolor
> >   ;
> >
> > operator
> >   : '/' S* | COMMA S* | /* empty */
> >   ;
> >
> > following this we are getting rule for a non quouted font names:
> >
> > font-name: IDENT S* [, IDENT S* ]*
>
> Where did IDENT come from? The spec specifically says that any valid CSS
> construct is allowed, including blocks, etc.
>
>    font-family: url(bla)  3em  /;
>
> ...is valid; it's the same as:
>
>    font-family: "url(bla) 3em /";
>
> Whether this is a good thing or not is up for discussion but that's what
> CSS1 said and now we're stuck with it.
>
> (Admittedly the grammar in CSS2.1 doesn't match this. That's an error in
> the grammar. I've noted it.)
>
> -- 
> Ian Hickson                                      )\._.,--....,'``.    fL
> U+1047E                                         /,   _.. \   _\  ;`._ ,.
> http://index.hixie.ch/                         `._.-(,_..'--(,_..'`-.;.'
>
Received on Wednesday, 19 May 2004 18:31:08 GMT

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