From: Itai Berli <itai.berli@gmail.com>
To: 27525@debbugs.gnu.org
Subject: bug#27525: 25.1; Line wrapping of bidi paragraphs
Date: Tue, 4 Jul 2017 12:11:05 +0300 [thread overview]
Message-ID: <CABsNJ=PyrdUBU4bsa+Y7oD=97OwQpgCgcGVS-Qq5BmrC7uJtbg@mail.gmail.com> (raw)
In-Reply-To: <CABsNJ=M_vAG49AuX8x9xZ4=QB7gZxDWjvfLQrrphJWaY+_pKaA@mail.gmail.com>
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I obviously didn't end up replacing the bullet points by numbers...
On Tue, Jul 4, 2017 at 12:10 PM, Itai Berli <itai.berli@gmail.com> wrote:
> I'd like to add that this behavior breaks the Unicode bidirectional
> algorithm (UBA), and hence invalidates Emacs' claim of full conformance, or
> indeed of weak conformance, for that matter (so-called 'implicit
> bidirectionality' -- see section 4.2 of the UBA specifications).
>
> The reason is that section 3.4 'Reordering Resolved Levels' of the
> algorithm states (I replaced the bullet points in the original by numbers):
>
> > * The characters are shaped into glyphs [...]
> *> * *The accumulated widths of those glyphs *(in logical order)* are
> used to determine line breaks.
>
> The Emacs line-wrapping algorithm does not use the logical order of the
> glyphs to determine line breaks, as evidence by the example given in my
> original post, which I shall link to again: http://imgur.com/Bckn7zP
>
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next prev parent reply other threads:[~2017-07-04 9:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-29 7:23 bug#27525: 25.1; Line wrapping of bidi paragraphs Itai Berli
2017-06-29 14:55 ` Eli Zaretskii
2017-06-29 18:35 ` Itai Berli
2017-07-04 9:10 ` Itai Berli
2017-07-04 9:11 ` Itai Berli [this message]
2017-07-04 9:19 ` Itai Berli
2017-07-04 14:43 ` Eli Zaretskii
2017-07-04 14:52 ` Itai Berli
2017-07-04 15:19 ` Eli Zaretskii
2017-07-04 23:05 ` Richard Stallman
2017-07-05 2:29 ` Eli Zaretskii
2017-07-05 22:59 ` Richard Stallman
2017-07-06 2:39 ` Eli Zaretskii
2017-07-06 16:01 ` Richard Stallman
2017-07-06 16:17 ` Eli Zaretskii
2017-07-07 18:23 ` Richard Stallman
2017-07-07 19:21 ` Eli Zaretskii
2017-07-09 18:17 ` Benjamin Riefenstahl
2017-07-09 18:30 ` Eli Zaretskii
2017-07-19 8:50 ` Itai Berli
2017-07-19 12:59 ` Itai Berli
2017-07-19 17:28 ` Eli Zaretskii
2017-07-19 21:40 ` Itai Berli
2017-07-20 5:08 ` Eli Zaretskii
2017-07-20 7:01 ` Itai Berli
2017-07-20 11:09 ` Eli Zaretskii
2017-07-21 6:19 ` Itai Berli
2017-07-21 8:37 ` Eli Zaretskii
2017-07-21 9:44 ` Itai Berli
2017-07-21 10:58 ` Itai Berli
2017-07-21 13:19 ` Eli Zaretskii
2017-07-21 13:01 ` Eli Zaretskii
2017-07-19 17:24 ` Eli Zaretskii
2017-07-04 14:40 ` Eli Zaretskii
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