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Re: [css3-text] fullwidth punctuation kerning

From: Ambrose LI <ambrose.li@gmail.com>
Date: Tue, 28 Sep 2010 04:06:08 -0400
Message-ID: <AANLkTimKwW-pgkXRtO9H+wxBk0DYHAXX6dA-yAKVykyj@mail.gmail.com>
To: John Daggett <jdaggett@mozilla.com>
Cc: www-style <www-style@w3.org>, www-font <www-font@w3.org>
On 28 September 2010 03:22, John Daggett <jdaggett@mozilla.com> wrote:
> Section 7.3 of the CSS3 Text spec details a property that effectively
> controls kerning on a small subset of CJK punctuation characters:
>
>  http://dev.w3.org/csswg/css3-text/#punctuation-trim
>
> I don't quite see the necessity of of an author level property to
> control this unless it's something that is really controlled at an
> author level stylistically.  In fact, supporting this in a browser
> that uses an OpenType layout engine would effectively require
> *undoing* layout based kerning information contained in fonts,
> especially since the default is 'none'.
>
> I think it would be better omit this property and let the text layout
> engine handle this in conjuction with well-designed fonts.

I think I agree with you in principle, but as far as I know only
Japanese fonts are "well designed" (OpenType-wise). Chinese
fonts, as far as I know (but I may be wrong) do not generally
contain any such information. So whoever proposed the property
probably had Chinese fonts in mind.

> John Daggett


-- 
cheers,
-ambrose
Received on Tuesday, 28 September 2010 08:13:27 GMT

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