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Re: [css-writing-modes] computed value for text-orientation: sideways or sideways-right

From: 馬場孝夫 <baba@bpsinc.jp>
Date: Fri, 18 Sep 2015 12:52:15 +0900
Message-ID: <CAAWjb-du1EKUG60MRFf6NvENHizX7UtoEwMA7bWzm+wbw04Pjw@mail.gmail.com>
To: Koji Ishii <kojiishi@gmail.com>
Cc: fantasai <fantasai.lists@inkedblade.net>, Gérard Talbot <www-style@gtalbot.org>, Jonathan Kew <jfkthame@gmail.com>, W3C www-style mailing list <www-style@w3.org>
If we use 'sideways' as the computed value for 'sideways-right', 'sideways'
has to mean rotate 90° clockwise. I think this makes two problems in future:

(1) We cannot use 'sideways' for auto-switching mechanism according to
'writing-mode' (like original intent of the spec).

(2) Both 'sideways' and 'sideways-right' means rotate clockwise, while
'sideways-left' means counter-clockwise (as following list). It is
and looks weird.

- sideways-right: computed to 'sideways'
- sideways-left: rotate counter-clockwise
- sideways: rotate clockwise

東京都新宿区西新宿6-20-7 コンシェリア西新宿TOWER'S WEST 2F
Tel: 03-6279-4320 Fax: 03-6279-4450
馬場 孝夫(Baba Takao)

On Fri, Sep 18, 2015 at 11:27 AM, Koji Ishii <kojiishi@gmail.com> wrote:
> On Fri, Sep 18, 2015 at 10:49 AM, 馬場孝夫 <baba@bpsinc.jp> wrote:
>> Hi Jonathan, Gerard, fantasai.
>> # This is my first time to sending www-style. Nice to e-meet you.
>> # I'm Baba, a colleague of Hiroshi (skk@bpsinc.jp).
>> I roughly agree to Gerard.
>> In my opinion 'text-orientation: sideways-left' might be needed in the
>> future,
>> because of the following reason:
>> Since an inline box which has a different 'writing-mode' property to its
>> parent
>> becomes inline-block, it is impossible to align original baseline between
>> clockwise-rotated texts and counter-clockwise-rotated texts. Mostly this
>> is not
>> required because mixing them in a same line is rare, but is possibly
>> needed in
>> the future. So we propose to disuccuss it in future level.
> I don't think we'd have any troubles if we make 'sideways' as the
> computed value, and in future we want to add 'sideways-left', so it
> look relevant to me. What's the problem for you?
> /koji
Received on Friday, 18 September 2015 03:52:46 UTC

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