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Re: [css-writing-modes] Propose to weaken upright rendering of horizontal-only scripts

From: fantasai <fantasai.lists@inkedblade.net>
Date: Wed, 30 Sep 2015 21:22:20 -0400
To: www-style@w3.org, Jonathan Kew <jfkthame@gmail.com>
Message-ID: <560C8ACC.4090306@inkedblade.net>
On 05/19/2015 12:20 AM, fantasai wrote:
> Jonathan Kew wrote:
>> What's less clear, IMO, is how to handle the complex Indic scripts
>> where reordering and clustering behavior is involved.
>
> Yes, this is a fair criticism. I think the default behavior should
> be to break the text into grapheme clusters, and render each upright
> individually. For cases where this is known to be incorrect, and
> more correct rules are known (e.g. per-syllable), then those rules
> override this default rule.
>
>> I agree there are gaps in our knowledge of how best to render some
>> scripts in this mode, but rather than weakening the current spec
>> text, which I think is OK as far as it goes, perhaps we should
>> just have a note that the behavior of complex scripts such as
>> Indic and SE Asian in vertical upright is not clearly defined yet.
>
> Again, agreed. And we should add that note. :)

I rebased the Writing Modes spec on the definition "typographic
character unit" from CSS3 Text:
   https://drafts.csswg.org/css-text/#characters

Let me know if you think we need further clarification.

~fantasai
Received on Thursday, 1 October 2015 01:22:49 UTC

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