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Re: [CSS21] CR-CSS21-20070719, 8.3.1 Collapsing in presence of min/max-height, small correction suggested

From: Bruno Fassino <fassino@gmail.com>
Date: Wed, 30 Jul 2008 18:17:44 +0200
Message-ID: <da98bce00807300917jac5c072n9b9e1c5cd58e9ba8@mail.gmail.com>
To: "www-style@w3.org" <www-style@w3.org>, "Bert Bos" <bert@w3.org>

On Wed, Jul 30, 2008 at 3:52 PM, Bert Bos <bert@w3.org> wrote:
>
>> Arron Eicholz wrote:
>> >> I don't think it makes sense for margins that aren't anywhere
>> >> close to being "adjoining" to collapse.
>
>> > So... new issue: in
>> >   <div style="height: 500px;">
>> >     <div style="height: 10px;"/>
>> >   </div>
>> > We can't find anything in the spec that says these margins aren't
>> > adjoining
[...]

> Maybe what's missing is a rule that says that an element with a 'height'
> other than 'auto' doesn't collapse its bottom margin with its children.


If I understand well, the following paragraph in 8.3.1, which lists
the conditions under which there is such collapsing, already mentions
that height must be auto:

"The bottom margin of an in-flow block-level element with a 'height'
of 'auto' and 'min-height' less than the element's used height and
'max-height' greater than the element's used height is adjoining to
its last in-flow block-level child's bottom margin if the element has
no bottom padding or border."

I assumed that paragraph was meant as listing the _only_ cases under
which that collapsing/adjoining occurs. If this is its meaning, then
'height not auto' already excludes adjoining.

And then there is further doubt just mentioned by Boris...

Bruno

-- 
Bruno Fassino http://www.brunildo.org/test
Received on Wednesday, 30 July 2008 16:18:20 GMT

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