- From: Shinichiro Hamaji <hamaji@chromium.org>
- Date: Tue, 22 Dec 2009 23:31:34 +0900
- To: "L. David Baron" <dbaron@dbaron.org>
- Cc: www-style@w3.org
Hi, On Thu, Dec 17, 2009 at 6:06 AM, L. David Baron <dbaron@dbaron.org> wrote: > > In http://dev.w3.org/csswg/css3-values/#the-calc-function , there is > currently text: > > # <number-multiplicative-expression> := > # <number-term> | > # <length-multiplicative-expression> S* '/' S* <length-term> | > # <length-multiplicative-expression> S+ 'mod' S+ <length-term> I'm not sure, but I guessed the intention of this grammar is that users can calculate how many ems they can put by calc(100%/1em). This would explain why there isn't a rule for multiplication here. However, I can see a sentence that says "Issue: At a later ... division by length units etc. may be added." in the draft. Sorry if my uneducated guess is totally wrong. Anyway, if we will have '/' and mod for numbers, I think we should add '*', too. Otherwise, the users may complain why they can calc((2/2)*2px) but cannot calc((2*2)*2px). My personal preference is supporting both, i.e., # <number-multiplicative-expression> := # <number-term> | # <length-multiplicative-expression> S* '/' S* <length-term> | # <length-multiplicative-expression> S+ 'mod' S+ <length-term> # <number-multiplicative-expression> S* '*' S* <number-term> | # <number-multiplicative-expression> S* '/' S* <number-term> | # <number-multiplicative-expression> S+ 'mod' S+ <number-term> Thanks,
Received on Wednesday, 23 December 2009 22:59:14 UTC