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Re: [CSSWG][css-writing-modes] Last Call for Comments on CSS3 Writing Modes

From: Aharon (Vladimir) Lanin <aharon@google.com>
Date: Fri, 7 Feb 2014 12:57:10 -0500
Message-ID: <CA+FsOYbS1yHHRrhUSdQqq7swdbfzf22Gb-7AH8NtmzfLBpuB-g@mail.gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>
Cc: "www-style@w3.org" <www-style@w3.org>, WWW International <www-international@w3.org>, CJK discussion <public-i18n-cjk@w3.org>, "public-i18n-bidi@w3.org" <public-i18n-bidi@w3.org>, Unicode <unicode@unicode.org>
Thanks, looks great!

Just one nit: HL1 etc. are not rules. UAX9 referes to the HLs as "clauses".
So, the references to them should be something like "clause HLx of [UAX9]".

On Fri, Feb 7, 2014 at 2:06 AM, fantasai <fantasai.lists@inkedblade.net>wrote:

> On 12/26/2013 05:58 AM, Aharon (Vladimir) Lanin wrote:
>> Hixie filed https://www.w3.org/Bugs/Public/show_bug.cgi?id=24006 on
>> Writing Modes in the beginning of December, and I added some comments
>> there. It does not seem to have been addressed yet.
> Thanks for punting that to the ML.
> Wrt the paragraph beginning "In general...", it has been revised:
>   # In CSS, the paragraph embedding level must be set (following rule HL1)
>   # according to the direction property of the paragraph’s containing
>   # block rather than by the heuristic given in steps P2 and P3 of the
>   # Unicode algorithm. There is, however, one exception: when the
>   # computed unicode-bidi of the paragraph’s containing block is
>   # 'plaintext', the Unicode heuristics in P2 and P3 are used as
>   # described in [UAX9], without the HL1 override.
> Wrt referring to the HL* rules, the bidi spec does not appear to require
> such references, only that modifications to the algorithm conform to
> those rules. However I have added the references as you request to help
> clarify the intent.
> Wrt using "must" everywhere, whether one agrees or disagrees with the
> style,
> it is not a habit of the CSS specs to do so, and statements without the
> modifier are nonetheless normative per
>   http://www.w3.org/TR/css3-writing-modes/#conventions
>  > is "the bidi control codes assigned to the end" defined anywhere?
>> Yes, the control codes are defined under the various unicode-bidi
>> values [..] But I agree that some sort of reference is needed.
> Since this sentence is only a few paragraphs below the section that
> defines them, I haven't added a link. But all of them are now talking
> about rule HL3, so this will help create that correspondance.
>  I now realize, however, that the spec does not make it 100% clear for
>> isolate-override whether it "combines" the isolate on the outside of
>> the override or vice-versa.
> This is now specified explicitly.
> Comment #2 is handled separately, see thread at
>   http://lists.w3.org/Archives/Public/www-style/2014Feb/0267.htm
> Updated ED: http://dev.w3.org/csswg/css-writing-modes/
> Please let me know if this sufficiently addresses the comment.
> ~fantasai
Received on Friday, 7 February 2014 17:57:58 UTC

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