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Re: [css3-text] text-justify: inter-ideograph should not separate U+3033 from U+3035

From: fantasai <fantasai.lists@inkedblade.net>
Date: Fri, 10 May 2013 19:34:42 -0700
Message-ID: <518DAE42.2080909@inkedblade.net>
To: www-style@w3.org
On 01/08/2013 09:23 PM, Yuki Sekiguchi wrote:
> Hi,
> I read current editor's draft of CSS Text Module Level 3.
> It says about text-justify: inter-ideograph[1]:
>> ‘inter-ideograph’
>> Justification primarily changes spacing at word separators and between characters in block scripts. This value is typically used for CJK languages.
> Block script is defined like following[2]:
>> block scripts
>> CJK and by extension all Wide characters. (See [UAX11]) The following scripts are included: Bopomofo, Han, Hangul, Hiragana, Katakana, Yi
> UAX11 define U+3033 and U+3033 are wide characters.
> Therefore, text-justify: inter-ideograph should separate U+3033 from U+3035..
> However, Requirements for Japanese Text Layout define them as
> inseparable characters[3].
> I think separating U+3033 from U+3035 is odd behavior from Japanese perspective.
> [1]: http://dev.w3.org/csswg/css3-text/#text-justify0
> [2]: http://dev.w3.org/csswg/css3-text/#block-scripts
> [3]: http://www.w3.org/TR/2012/NOTE-jlreq-20120403/#cl-08


I believe this is actually an error in Unicode--this pair
should form a single grapheme cluster, as they are really
two halves of a single character. If that is fixed, then
the correct behavior logically follows, since CSS does not
allow line-breaking or justification to break apart a
single grapheme cluster.

I have reported this to the UTC. Hopefully they will fix
it in a future version of Unicode!

Received on Saturday, 11 May 2013 02:35:09 UTC

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