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Re: [css-writing-modes] Vertical upright Mongolian intrinsic orientation

From: Gérard Talbot <www-style@gtalbot.org>
Date: Wed, 03 May 2017 05:19:59 -0400
To: Kari Pihkala <kari.pihkala@gmail.com>
Cc: Elika Etemad <fantasai.lists@inkedblade.net>, W3C www-style mailing list <www-style@w3.org>, Koji Ishii <kojiishi@gmail.com>
Message-ID: <e7ce4f0f6cc97239f9a3ad97e64e6426@gtalbot.org>
Le 2017-05-03 01:52, Kari Pihkala a écrit :
>> 
>> If it's typesetting correctly in mixed orientation, but not upright, 
>> it's a browser bug.
>> (I think this is unclear because UTR50 does not provide a data point 
>> to reference here,
>> but the proper behavior can be derived from a combination of UTR50 
>> data and the script
>> tag.)
>> 
>> ~fantasai
> 
> Thanks. I filed a bug for Firefox [1] and Chrome [2].
> 
> I also found a test case for this (Mongolian code points
> U+1800–U+18AF), but I don’t understand why it claims it passes for
> Blink:
> http://test.csswg.org/harness/results/css-writing-modes-3_dev/grouped/text-orientation-script-001b/

Kari,

I got 3 passes when I tried that test myself on 2016-11-09 with Chrome 
56. I still get 3 passes with Chrome 58. You must be referring to the 
test itself. This is where I believe you should try to reach Koji Ishii, 
who authored that test, and notify him that Traditional Mongolian glyphs 
should not translate upright when 'text-orientation: upright' is 
declared.

I am under the impression that it is the UTR50 document that should be 
reviewed and corrected here in light of what you and Elika have been 
exchanging about.


> Chrome doesn’t display Mongolian correctly for text-orientation:
> upright. Is the test for something else than testing text-orientation:
> upright?

No, I do not think that the test is testing anything else or anything 
more than 'text-orientation: upright'. It uses a special font too via a 
font-face at-rule:
@font-face {
     font-family: "orientation";
     src: url("support/adobe-fonts/CSSHWOrientationTest.otf");
}

> I couldn’t find any other test for upright Mongolian.

There is no test specifically testing 'text-orientation: upright' when 
being applied on Traditional Mongolian glyphs in the writing-modes test 
suite nor over in Richard Ishida's website:

https://www.w3.org/International/tests/repo/results/writing-mode-vertical#lr_glyphs

+CC: Koji Ishii

Gérard

> [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1361631
> [2] https://bugs.chromium.org/p/chromium/issues/detail?id=717862
Received on Wednesday, 3 May 2017 09:20:34 UTC

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