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Re: [css-grid][css-align] Issues with align-content / justify-content properties

From: Javier Fernandez <jfernandez@igalia.com>
Date: Mon, 17 Nov 2014 17:22:15 +0100
Message-ID: <546A20B7.8090109@igalia.com>
To: www-style@w3.org
Hi,

Could any of the Grid Layout authors provide additional feedback on this
thread, please ?  What's your opinion about <content-distribution>
values for Grid ?

Thanks.

--
javi

On 11/11/2014 05:49 PM, fantasai wrote:
> On 11/11/2014 08:08 AM, Javier Fernandez wrote:
>> Hi,
>>
>> I've been playing with the <content-distribution> values in Grid Layout.
>> I've got some doubts regarding some implications of considering cells
>> instead of grid items to interpret the Box Alignment specification.
>>
>> However, in the case of 'stretch' there are some issues I haven't solve
>> yet. According to the specification, the 'stretch' value is defined as
>> follows:
>>
>> "If the combined size of the items is less than the size of the
>> alignment container, any auto-sized items have their size increased
>> equally so that the combined size exactly fills the alignment container,
>> and then clamped by their max-width/max-height constraints."
>>
>> 1- There are many ways of defining track sizing [1]. Which one would
>> be candidate to be such "auto-sized items" ? I'm assuming they would be
>> only 'auto' (which computes to minmax(min-content, max-content). Is that
>> assumption correct in your opinion ?
> 
> I think that definition was written for properties that apply to
> actual items... Where there is one, 'stretch' is applied to the
> intermediary construct between the container and the items: the
> flex line in Flexbox, and the grid track in Grid Layout. In Flexbox,
> this wasn't an issue because lines don't have associated sizing
> information.
>   http://www.w3.org/TR/css-flexbox-1/#align-content-property
> 
> In Grid Layout, I'm not sure what's the most sensible answer. My
> first guess is to ignore the sizing information and just stretch
> all of the tracks, but we should probably ping some authors and
> see what they would expect.
> 
>> 2- When the grid is defined, user might choose track sizes to keep
>> some proportionality between all of them. Shouldn't the 'stretch' logic
>> increase the items size keeping such proportions ?
> 
> It doesn't do that for Flexbox, so it shouldn't do that here, either.
> 
>> 3- how would you interpret the 'max-width/max-height constraints' in
>> the case of track sizing ?
>>
>> [1] http://dev.w3.org/csswg/css-grid/#track-sizing
> 
> See above for #1...
> 
> ~fantasai
> 
> 
Received on Monday, 17 November 2014 16:22:40 UTC

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