Re: [css-writing-modes-3] range limit for 'text-combine-upright: all' versus 'text-combine-upright: digits <integer>'

On Jun 23, 2015, at 03:13, Gérard Talbot <www-style@gtalbot.org> wrote:
> 
> Le 2015-06-22 14:03, Florian Rivoal a écrit :
>>> On 22 Jun 2015, at 11:35, Koji Ishii <kojiishi@gluesoft.co.jp> wrote:
>>>> There seems to be no implicit (and no explicit) range limit to the number of consecutive characters when using 'text-combine-upright: all' but there is a range 2-4 limit with 'text-combine-upright: digits n':
>>>> Q1: is that assumption correct? (To me, this seems odd and incoherent.)
>>> Correct.
>>>> Q2: If there is no range limitation with 'text-combine-upright: all', then
>>>> why should there be one with 'text-combine-upright: digits n' where 'n'
>>>> would be a [2-9] digit?
>>> “all” is not likely to be affected much by the number of characters; it just measure the whole string, and shrink if needed.
>>> “digits” checks the number of characters, and thus could fail on specific number. A request was made to avoid implementations and testing that were never used in the real world.
>> I agree with Gérard.
>> I understand wanting to limit to 4 digits since there is no use case
>> for more if that makes implementations simpler.
>> I do not understand why the logic is not applied to the all value,
>> allowing it to only match up to 4 digits.
> 
> Yes. Exactly what I thought. Thank you Florian.

“all” is only about scaling. We don’t limit, for instance, transform: scale() even if scale factor such as 1,000,000 won’t be used at all, right?

On the other hand, “digits" value has two effects; limits number of characters to apply, and when apply, it scales by 1em/width.

/koji