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Re: Fw: [typography] How are underlines positioned in non-Latin text?

From: r12a <ishida@w3.org>
Date: Wed, 18 Jan 2017 17:19:02 +0100
To: Uma Umamaheswaran <umavs@ca.ibm.com>, r12a via GitHub <sysbot+gh@w3.org>
Cc: Steven Atkin <atkin@us.ibm.com>, Carol Stock <STOCK@CA.IBM.COM>, Nattapong Sirilappanich <natta@th.ibm.com>, www-international@w3.org
Message-ID: <8c381e0c-5ace-6343-51ac-271960d15d58@w3.org>
Uma, Nattapong,

thanks for this information and for the useful example. There is a 
proposed property in the CSS level 3 Text Decoration spec that is 
intended to handle this problem.

See https://drafts.csswg.org/css-text-decor-3/#text-decoration-skip-property

As far as i'm aware, it's not supported yet in any browser.


On 12/01/2017 15:59, Uma Umamaheswaran wrote:
> Hello Richard:
> I had forwarded your following posting from you from Nov 18, 2016, to a
> colleague of mine in IBM Thailand.  I am appending some feedback he has
> provided for your consideration.  You may contact him directly for any
> further clarifications.
> V.S. UMAmaheswaran, Ph.D.
> Globalization Centre of Competency, IBM Toronto Lab
> A3/SZ8, 8200 Warden Avenue, Markham, ON, Canada, L6G1C7; +1 905 413
> 3474; Fax: +1 905 413 4751; TieLine 313-3474; email: umavs@ca.ibm.com
> ========================
> r12a has just created a new issue for
> https://github.com/w3c/typography:
> == How are underlines positioned in non-Latin text? ==
> CSS WG folks and browser implementers are looking for information
> about how to position underlines for various scripts. Can anyone
> provide them with the information they need for one or more scripts?
> See w3c/csswg-drafts#459 (comment)
> See https://github.com/w3c/typography/issues/1
> Please do NOT reply to this email. If you'd like to contribute to the
> discussion, please do so at the above link. You will need to subscribe
> yourself to the issue (using the button provided by that page) to
> receive notifications of further comments.
> ----- Forwarded by Uma Umamaheswaran/Toronto/IBM on 2017-01-12 09:38 -----
> Feedback from:   Nattapong Sirilappanich (E-mail: natta@th.ibm.com), IBM
> Thailand
> --------------------
> Hi Uma,
> I just finish installing MS.Word 2016 into my MacBook.
> On top of below note,
> I attach some screen shot from latest MS.Word 2016.
> Here's what I talk about, a correct way to make underline Thai text.
> Hi Uma,
> If I'm not mistaken, they want to introduce "offset" attribute to shift
> the position of the underline.
> If that's the case, it'd be no use for Thai.
> Because Thai script require underline to be exactly in "under" level of
> rendering which is the typical rendering of underline position.
> The thing is, when there is a colliding between underline and the glyph,
> the underline must be absent only where the colliding occur with some
> small surrounding white space.
> Unfortunately, there's nobody implementing that for a while.
> From What I can check as of now, even MS.Word 2013 has colliding
> underline with Thai glyph.
> e-mail: natta@th.ibm.com
Received on Wednesday, 18 January 2017 16:19:15 UTC

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