W3C home > Mailing lists > Public > www-style@w3.org > May 2012

Re: [css3-flexbox] Changing abspos placeholders to atomic inlines

From: Anton Prowse <prowse@moonhenge.net>
Date: Tue, 22 May 2012 23:46:13 +0200
Message-ID: <4FBC0925.5080100@moonhenge.net>
To: www-style@w3.org
CC: fantasai <fantasai.lists@inkedblade.net>, "Tab Atkins Jr." <jackalmage@gmail.com>
On 22/05/2012 02:43, fantasai wrote:
> On 05/21/2012 02:38 PM, Tab Atkins Jr. wrote:
>> On Sun, May 20, 2012 at 2:36 AM, Anton Prowse<prowse@moonhenge.net>
>> wrote:
>>> On 18/05/2012 02:44, Tab Atkins Jr. wrote:
>>>> Issue link: http://wiki.csswg.org/topics/css3-flexbox-abspos-flex-items
>>>> Previously, the "placeholder" left behind by abspos items was defined
>>>> to be a "0x0 anonymous inline". Anton raised the issue that setting
>>>> an inline to 0 height doesn't really do anything, and we may instead
>>>> want to set its line-height to 0. Instead, fantasai and I decided to
>>>> just change them to atomic inlines. This makes the 0 height actually
>>>> matter.
>>>> This has additional implications, though. As an atomic inline, the
>>>> placeholder now becomes a flex item, rather than being wrapped in a
>>>> flex item. This actually seems like slightly better behavior, as it
>>>> means that it responds directly to flex-align.
>>> I think that works, but I'm not seeing the connection to
>>> 'flex-align'; would
>>> you mind elaborating?
>> The effect actually isn't as large as I previously thought. The
>> effects of 'flex-align' on an anonymous block around the placeholder
>> end up being about the same as applying them the placeholder itself.
>> Possibly identical, but I'm not certain off the top of my head. It
>> may be simply that the only observable effect is to make two abspos
>> elements next to each other still take up two "spots" for the purpose
>> of flex-pack:justify and such.
> Yeah, the only observable effect would for those 'flex-pack' values.
> This change makes the behavior of placeholders more explainable imo.
> Each abspos placeholder individually acts as a zero-width flex item,
> so two of them will no longer glom together as one, nor will they
> be scooped up into a run of inlines.

Yeah, I think this makes the placeholder concept more discoverable in 
practice, which is a good thing.

I still don't like placeholders for abspos (in general) though.  Ho hum.

Anton Prowse
Received on Tuesday, 22 May 2012 21:47:04 UTC

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