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RE: [css3-text] fullwidth punctuation kerning

From: Koji Ishii <kojiishi@gluesoft.co.jp>
Date: Tue, 14 Dec 2010 06:55:05 -0500
To: John Daggett <jdaggett@mozilla.com>
CC: www-style <www-style@w3.org>, www-font <www-font@w3.org>, Ambrose LI <ambrose.li@gmail.com>
Message-ID: <A592E245B36A8949BDB0A302B375FB4E0AA8B1BC27@MAILR001.mail.lan>
The description of the 'punctuation-trim' property[1] is now updated to resolve the issue John pointed out.

Thank you again John for pointing this out.


[1] http://dev.w3.org/csswg/css3-text/#punctuation-trim

[2] http://lists.w3.org/Archives/Public/www-style/2010Dec/0130.html



Regards,
Koji

-----Original Message-----
From: Koji Ishii 
Sent: Monday, December 06, 2010 4:18 PM
To: 'John Daggett'
Cc: www-style; www-font; Ambrose LI
Subject: RE: [css3-text] fullwidth punctuation kerning

This is a bit old thread, but I'm revisiting this to make sure the issue is resovled.

>> I'm sorry for my ignorance but could you please explain what the 
>> "well designed (OpenType-wise)" font is?
>
>In this case, fonts with proper kerning data.

To respond to John's concern, I would propose to add the following sentence to the spec:

  Fullwidth opening and closing punctuation must not be trimmed if the
  glyph is not actually fullwidth. A fullwidth glyph is one that has the
  same advance width as a typical Han character in the same font.
+ This includes the case where the glyph is not fullwidth as a result of 
+ the kerning in the font.

I hope this clarifies the concern.


Regards,
Koji

-----Original Message-----
From: John Daggett [mailto:jdaggett@mozilla.com]
Sent: Tuesday, September 28, 2010 11:32 PM
To: Ishii Koji
Cc: www-style; www-font; Ambrose LI
Subject: Re: [css3-text] fullwidth punctuation kerning


Hi Koji,

> I'm sorry for my ignorance but could you please explain what the "well 
> designed (OpenType-wise)" font is?

In this case, fonts with proper kerning data.

> Or does such font include variable spacing depending on the 
> combinations of two characters?

Right, this is precisely what kerning is.

Cheers,

John Daggett

Received on Tuesday, 14 December 2010 11:58:22 GMT

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