Re: [css3 box, cssom] flexibility in box-sizing and offset* properties

Within the WebKit community, I haven't heard opposition to exposing
padding-box, but when it has come up, the question has been what use-cases
it enables. Can you give specific examples where border-box and content-box
are insufficient?

Ojan

On Thu, Jun 16, 2011 at 2:20 AM, Aron Allen <me@aronallen.com> wrote:

> The new box-sizing CSS property is really useful.
> I often find myself designing scalable interfaces, where I want to have a
> fixed width on the padding, margin, and/or border, but a relative width on
> the element in whole, this is now possible (without overflowing boxes) with
> CSS3.
>
> Firefox currently implements: 'content-box', 'border-box', 'margin-box' and
> 'padding-box', the current draft only proposes the 'border-box' value.
> But in some situations it is really useful to be able to set the box-sizing
> model to one of the four edges, especially when designing full-width mobile
> apps.
>
> I disagree with the '.' accessor procedure, since it changes some
> fundamental language principles in CSS.
>
> I do not fear property name explosion, the box-sizing property gives
> enormous freedom to designers, finally they can choose a box-model that fits
> them.
>
>
> > [Excuse me if this has been discussed before.]
> >
> > Regarding the current suggestion on box-width/box-sizing, why not
> generalize
> > it to all edges, ie margin-box, border-box, padding-box and content-box?
> > There are situations when all these alternatives can be useful.
> > Either it can be done by adding more values to box-sizing, or to add more
> > properties f ex margin-box-width, border-box-width etc, but the latter
> may
> > lead to a property name "explosion" as you probably want to offer this
> > functionality for min-width/max-width, positioning etc.
> >
> > An alternative could be to use suffixes on existing properties:
> >   #myDiv {
> >     width.marginedge: 90%;
> >     min-width.contentedge: 5em;
> >   }
> > where the last property assignment could as well be written as
> "min-width"
> > without suffix as it corresponds to the current CSS21 rules. The same
> system
> > could apply to positioning properties (top.borderedge etc).
> >
> > A related feature is being able to query an element's position and size
> with
> > respect to different edges using the offset* DOM properties, or similar
> > feature. Today we see developers using libraries like Dojo
> (dojo.html.layout
> > package) to get to this information in a convenient way. It would be a
> > strength to have this standardized in the browser's native library
> instead.
> >
> > Best regards
> > Mike
>
>
> --
> Kindest regards,
> Aron Allen.
>
> +45 31 48 32 42
>
> Sent from my Mac.
>
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