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Re: New tests: Line breaks in CSS3 Text

From: Richard Ishida <ishida@w3.org>
Date: Fri, 14 Sep 2012 15:14:14 +0100
Message-ID: <50533BB6.2000200@w3.org>
To: Glenn Adams <glenn@skynav.com>
CC: www International <www-international@w3.org>, W3C Style <www-style@w3.org>
On 01/09/2012 04:28, Glenn Adams wrote:
> On Fri, Aug 31, 2012 at 12:53 AM, Richard Ishida <ishida@w3.org
> <mailto:ishida@w3.org>> wrote:
>
>     Several sets of tests are now available related to line breaks, word
>     breaks and hyphenation in CSS3 Text and Unicode Standard Annex #14
>     (Line Breaking Properties). Some of the tests are rewrites of
>     previous tests in the Internationalization Activity test suite.
>     There are also many new tests.
>
>
> (1) all of the Conditional Japanese Starter (CJ) test sets are missing
> U+FF70, recently added in the latest ED [1][2];

See 
http://www.w3.org/International/tests/html-css/line-break-ja-zh/results-ja

Now added to the test suite.


>
> [1] http://dev.w3.org/csswg/css3-text/#line-break
> [2] http://lists.w3.org/Archives/Public/www-style/2012Aug/0860.html
>
> (2) the tests listed under Conditional Japanese Starter (CJ) for
> line-break: normal [3] are incorrect since CSS3 Text states that for
> *normal* and *loose*, that breaks before small kana and prolonged sound
> marks are permitted (not forbidden); these tests currently treat
> according to *strict* semantics (forbidden), which is wrong (according
> to spec);
>
> [3]
> http://www.w3.org/International/tests/html-css/line-break-ja-zh/results-ja#normal
>
>
> (3) the tests for U+301C (WAVE DASH) and U+30A0 (KATAKANA-HIRAGABNA
> DOUBLE HYPHEN) listed under (Non-starter) NS for line-break: normal [3]
> are incorrect since CSS3 Text states that for *normal* and *loose*, that
> breaks before these characters are permitted (not forbidden); these
> tests currently treat according to *strict* semantics (forbidden), which
> is wrong (according to spec);
>
> (4) the tests for iteration marks {U+3005, U+303B, U+309D, U+309E,
> U+30FD, U+30FE} and also exclamation/question marks {U+203C, U+2047,
> U+2048, U+2049} listed under Non-starter (NS) for line-break: normal [3]
> are incorrect since CSS3 Text states that for *normal* and *strict*,
> that breaks before these characters are forbidden (not permitted); these
> tests currently treat according to *loose* semantics (permitted), which
> is wrong (according to spec);
>
> (5) the tests for U+2010 (HYPHEN) and U+2013 (EN DASH) listed under
> under Break After (BA) for line-break: normal [3] are incorrect since
> CSS3 Text states that for *normal* and *loose*, that breaks before these
> characters are permitted (not forbidden); these tests currently treat
> according to *strict* semantics (forbidden), which is wrong (according
> to spec);
>
> (6) the tests for exclamation/question marks {U+0021, U+003F, U+FF1F}
> listed under Exclamation (EX) for line-break: normal [3] are incorrect
> since CSS3 Text states that for *normal* and *strict*, that breaks
> before these characters are forbidden (not permitted); these tests
> currently treat according to *loose* semantics (permitted), which is
> wrong (according to spec);
>
> (7) the tests for U+003A (COLON) and U+003B (SEMICOLON) listed under
> under Infix Numeric Separator (IS) for line-break: normal [3] are
> incorrect since CSS3 Text states that for *normal* and *strict*, that
> breaks before these characters are forbidden (not permitted); these
> tests currently treat according to *loose* semantics (permitted), which
> is wrong (according to spec);
>
> (8) the tests for postfix characters {U+0025, U+00A2, U+00B0, U+2030,
> U+2032, U+2033, U+2103, U+FF05, U+FFE0} listed under Postfix Numeric
> (XB) for line-break: normal [3] are incorrect since CSS3 Text states
> that for *normal* and *strict*, that breaks before these characters are
> forbidden (not permitted); these tests currently treat according to
> *loose* semantics (permitted), which is wrong (according to spec);

I don't know what I was smoking when I created those normal tests, but 
all the above should now be fixed.


>
> (9) for each of the strict, normal, loose test sets, there seems to be a
> redundant test for U+0025 PERCENT SIGN, cf.,
> line-break-ja-zh-{050,053}, line-break-ja-zh-{150,153}, line-break-ja-zh-{250,253};

Removed.


>
> (10) for each of the strict, normal, loose test sets, there are no tests
> for the prefix characters {U+0024, U+00A3, U+00A5, U+20AC, U+2116,
> U+FF04, U+FFE1, U+FFE5} which are assigned specific break semantics by
> CSS3 Text;

Yes. I ran out of time to add those.


>
> (11) some of the CSS3 Text line-break rules are not sensitive to content
> language, e.g., small kana, prolonged sound marks, iteration marks, and
> inseparables; the current tests do not test that the specified rules are
> applied when content language is not ja or zh for these rules;

True. Again, I ran out of time.

>
> (12) similarly, the other CSS3 Text line-break rules are applied only if
> content language is ja or zh; there are no tests that these rules are
> not applied when content language is not ja or zh;

ditto

>
> As an FYI, I'm in the processing of addressing a WebKit bug against the
> line-break feature [4]. To this end, I've prepared some preliminary wiki
> documentation on this subject that may be of interest [5][6]. I would be
> interested in receiving any comments or corrections to this material.
>
> [4] http://bugs.webkit.org/show_bug.cgi?id=89235
> [5] http://trac.webkit.org/wiki/LineBreaking
> [6] http://trac.webkit.org/wiki/LineBreakingCSS3Mapping

> Regards,
> Glenn
Received on Friday, 14 September 2012 14:14:43 GMT

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