Re: [css3-page] Page-margin boxes layout

Le 11/11/2012 20:33, MURAKAMI Shinyu a écrit :
> The large difference is that the existing spec has the rule “The sum
> of the outer widths of the three boxes is equal to max box width.”

Ok, keeping that behavior sounds reasonable. Especially in the default 
case where all three widths are auto.


> […] in the following rules:
> * ... the used width for A and C is the respective ‘max-content’.
> * ... the used width for B is ‘max-content’.
> and the rule
> * ... the used width is min(max-content, max(min-content, available)),
> will be
>    the used width is max(min-content, available) ,

I’m not sure that exact set of changes covers all cases, but I think I 
understand the general intent and I’ll update the algorithm in that 
direction.


> unless ‘width: fit-content’ is specified explicitly.
>
> We have not implemented yet the ‘width: fit-content’ for margin boxes
> but I think it will be useful.

The definition of fit-content is:
min(max-content, max(min-content, fill-available))

If we take that literally, any of the three box could (with a big enough 
max-content) occupy the whole containing block, without regard of the 
amount of content in the other margin boxes that share the same 
containing block. So I think we would have to specialize the definition 
of fit-content.

Also, things can get complicated when the three boxes mix 'auto', 
'fit-content' or absolute lengths for 'width'…

Any suggestion?

Cheers,
-- 
Simon Sapin