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Re: [css-flexbox] intrinsic sizing

From: Christian Biesinger <cbiesinger@google.com>
Date: Wed, 6 May 2015 19:32:07 -0400
Message-ID: <CAPTJ0XERwcrbjhFZ5co8RBe4w9S_EPMGmr+vsdgwnz-K0aJEfw@mail.gmail.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
Cc: fantasai <fantasai.lists@inkedblade.net>, www-style list <www-style@w3.org>
On Wed, May 6, 2015 at 7:28 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
> On Wed, May 6, 2015 at 4:27 PM, Christian Biesinger
> <cbiesinger@google.com> wrote:
>> On Wed, May 6, 2015 at 7:26 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
>>> On Wed, May 6, 2015 at 4:11 PM, Christian Biesinger
>>> <cbiesinger@google.com> wrote:
>>>> On Wed, May 6, 2015 at 6:45 PM, Christian Biesinger
>>>> <cbiesinger@google.com> wrote:
>>>>> On Tue, May 5, 2015 at 7:57 PM, Christian Biesinger
>>>>> <cbiesinger@google.com> wrote:
>>>>>> On Tue, May 5, 2015 at 5:19 PM, fantasai <fantasai.lists@inkedblade.net> wrote:
>>>>>>> Let me know if that addresses your concern.
>>>>>>
>>>>>> Yes... it does. (As a sidenote, why is flex-basis: available not
>>>>>> definite? http://dev.w3.org/csswg/css-flexbox/#definite)
>>>>>
>>>>> After re-reading, there is another part here that requires layout to
>>>>> calculate the intrinsic size, I think:
>>>>> "3. Add each item’s flex basis [...]"
>>>>>
>>>>> The flex basis here may require layout, right? (flex-basis: content)
>>>>
>>>> Or maybe flex basis should say "flex base size"...?
>>>
>>> "flex basis" is just the 'flex-basis', or the 'width'/'height'.  "flex
>>> base size" is the one more likely to require layout; it's the value
>>> calculated by 9.2.3 and then clamped to get the hypothetical main
>>> size.
>>
>> But how would you calculate "flex-basis: content" here without layout?
>
> Easily - that's the keyword that means "act like width:auto", which is
> the same as "fill".

Hmm? How is that the same as fill?

> (And how would you calculate the flex base size without layout, is the
> flex basis requires layout? The flex base size uses the flex basis in
> its calculation!)

No, content gets mapped to max-content. max-content width does not
require layout. See 9.2 3.E.

-christian
Received on Wednesday, 6 May 2015 23:32:34 UTC

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