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From: Yuri Khan <yuri.v.khan@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Joost Kremers <joostkremers@fastmail.fm>,
	tomas@tuxteam.de, Emacs developers <emacs-devel@gnu.org>
Subject: Re: Ligatures
Date: Wed, 20 May 2020 02:00:03 +0700	[thread overview]
Message-ID: <CAP_d_8VV3gnf2=wnVUfCKrr4p9yjW+U+iogu9qkF+GT7C5Co4A@mail.gmail.com> (raw)
In-Reply-To: <83blmk80hm.fsf@gnu.org>

> > (And putting multiple diacritics over a single base character in> > various orders is a thing, it is the subject of the Unicode
> > Canonical Order subsection in Unicode standard.)
>
> Canonical order of diacritics is indeed important for jobs such as
> comparison, searching, etc.  But we are talking about display, and for
> display there's a requirement that the order should not matter as long
> as the base character comes first.  AFAIR, HarfBuzz supports that
> requirement, but not every other shaping engine does.

I meant, the Canonical Order spec could be a lot simpler (“just sort
all diacritics according to their codepoint value” rather than “take
great care to only swap two adjacent diacritics if their combining
classes differ and ordered wrongly”) if diacritics order did not
matter. But it does; <a> <acute> <diaeresis> is different from <a>
<diaeresis> <acute>, so the use case of putting point between the base
character and its following diacritic in order to insert a different
one is somewhat important. Indeed, toggling auto-composition-mode
solves that.



  reply	other threads:[~2020-05-19 19:00 UTC|newest]

Thread overview: 145+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-17 10:41 Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY) Julius Pfrommer
2020-05-17 14:09 ` Arthur Miller
2020-05-17 14:30   ` Eli Zaretskii
2020-05-17 15:06     ` Arthur Miller
2020-05-17 15:56       ` Eli Zaretskii
2020-05-17 16:50         ` Arthur Miller
2020-05-17 17:06           ` Eli Zaretskii
2020-05-17 14:35 ` Eli Zaretskii
2020-05-17 14:59   ` Julius Pfrommer
2020-05-17 15:55     ` Eli Zaretskii
2020-05-17 16:28       ` Pip Cet
2020-05-17 17:00         ` Eli Zaretskii
2020-05-17 18:50           ` Pip Cet
2020-05-17 19:17             ` Eli Zaretskii
2020-05-18 16:08               ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) Eli Zaretskii
2020-05-18 16:45                 ` tomas
2020-05-18 16:49                   ` Eli Zaretskii
2020-05-18 17:05                 ` Ligatures Stefan Monnier
2020-05-18 17:18                   ` Ligatures Eli Zaretskii
2020-05-18 19:19                     ` Ligatures Pip Cet
2020-05-18 19:25                       ` Ligatures tomas
2020-05-18 19:41                         ` Ligatures Pip Cet
2020-05-18 20:20                           ` Ligatures tomas
2020-05-18 19:33                       ` Ligatures Eli Zaretskii
2020-05-18 19:44                         ` Ligatures Clément Pit-Claudel
2020-05-19  2:25                           ` Ligatures Eli Zaretskii
2020-05-19  2:44                             ` Ligatures Clément Pit-Claudel
2020-05-19 13:59                               ` Ligatures Eli Zaretskii
2020-05-19 14:35                                 ` Ligatures Clément Pit-Claudel
2020-05-19 15:21                                   ` Ligatures Eli Zaretskii
2020-05-19 15:44                                     ` Ligatures Clément Pit-Claudel
2020-05-19 16:15                                       ` Ligatures Eli Zaretskii
2020-05-19 15:36                                 ` Ligatures Tassilo Horn
2020-05-19 16:08                                   ` Ligatures Eli Zaretskii
2020-05-19 16:14                                   ` Ligatures Stefan Monnier
2020-05-19  3:47                             ` Ligatures Stefan Monnier
2020-05-19  4:51                               ` Ligatures Clément Pit-Claudel
2020-05-18 19:38                       ` Ligatures Clément Pit-Claudel
2020-05-19 14:55                         ` Ligatures Pip Cet
2020-05-19 15:30                           ` Ligatures Clément Pit-Claudel
2020-05-19 15:52                             ` Ligatures Pip Cet
2020-05-18 17:24                   ` Ligatures tomas
2020-05-18 17:41                     ` Ligatures Eli Zaretskii
2020-05-18 19:07                       ` Ligatures tomas
2020-05-18 19:17                         ` Ligatures Eli Zaretskii
2020-05-18 20:33                     ` Ligatures Stefan Monnier
2020-05-18 17:31                 ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) Clément Pit-Claudel
2020-05-18 17:39                   ` Eli Zaretskii
2020-05-18 19:01                     ` Clément Pit-Claudel
2020-05-18 19:15                       ` Eli Zaretskii
2020-05-18 19:18                       ` tomas
2020-05-18 20:37                       ` Ligatures Stefan Monnier
2020-05-18 21:59                       ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) Alan Third
2020-05-19 13:56                         ` Eli Zaretskii
2020-05-19 14:39                           ` Clément Pit-Claudel
2020-05-19 21:43                             ` Pip Cet
2020-05-20  1:41                               ` Clément Pit-Claudel
2020-05-20  2:07                               ` Ligatures Stefan Monnier
2020-05-20  7:14                               ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) tomas
2020-05-20 15:18                               ` Eli Zaretskii
2020-05-20 17:31                                 ` Clément Pit-Claudel
2020-05-20 18:01                                   ` Eli Zaretskii
2020-05-20 18:33                                     ` Clément Pit-Claudel
2020-05-20 18:49                                       ` Eli Zaretskii
2020-05-20 18:53                                         ` Clément Pit-Claudel
2020-05-20 19:02                                           ` Eli Zaretskii
2020-05-20 23:19                                   ` Ligatures Stefan Monnier
2020-05-21 10:01                                 ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) Pip Cet
2020-05-21 14:11                                   ` Eli Zaretskii
2020-05-21 16:26                                     ` Pip Cet
2020-05-21 19:08                                       ` Eli Zaretskii
2020-05-21 20:51                                         ` Clément Pit-Claudel
2020-05-21 21:16                                           ` Pip Cet
2020-05-22  6:12                                             ` Eli Zaretskii
2020-05-22  9:25                                               ` Pip Cet
2020-05-22 11:23                                                 ` Eli Zaretskii
2020-05-22 12:52                                                   ` Pip Cet
2020-05-22 13:15                                                     ` Eli Zaretskii
2020-05-22 13:29                                                       ` Clément Pit-Claudel
2020-05-22 14:30                                                         ` Eli Zaretskii
2020-05-22 14:34                                                           ` Clément Pit-Claudel
2020-05-22 19:01                                                             ` Eli Zaretskii
2020-05-22 19:33                                                               ` Clément Pit-Claudel
2020-05-22 19:44                                                                 ` Eli Zaretskii
2020-05-22 20:02                                                                   ` Clément Pit-Claudel
     [not found]                                                                     ` <83mu5z171j.fsf@gnu.org>
2020-05-23 14:34                                                                       ` Clément Pit-Claudel
2020-05-23 16:18                                                                         ` Eli Zaretskii
2020-05-23 16:37                                                                           ` Clément Pit-Claudel
2020-05-22 13:56                                                       ` Pip Cet
     [not found]                                                         ` <83lflj16jn.fsf@gnu.org>
     [not found]                                                           ` <AF222EA0-FE05-4224-8459-2BF82CE27266@vasilij.de>
     [not found]                                                             ` <834ks7110w.fsf@gnu.org>
2020-05-23 11:24                                                               ` Vasilij Schneidermann
2020-05-23 13:04                                                                 ` Eli Zaretskii
     [not found]                                                           ` <83eerb145r.fsf@gnu.org>
     [not found]                                                             ` <CAOqdjBeef8Fa596raEyBUwv0Zr+41LSiYvHW39EdoaXpyxCXVw@mail.gmail.com>
     [not found]                                                               ` <831rnb0zld.fsf@gnu.org>
2020-05-23 12:36                                                                 ` Pip Cet
2020-05-23 14:08                                                                   ` Eli Zaretskii
2020-05-23 15:13                                                                     ` Pip Cet
2020-05-23 16:34                                                                       ` Eli Zaretskii
2020-05-23 22:38                                                                         ` Pip Cet
2020-05-24 15:33                                                                           ` Eli Zaretskii
2020-05-26 18:13                                                                             ` Pip Cet
2020-05-26 19:46                                                                               ` Eli Zaretskii
2020-05-27  9:36                                                                                 ` Pip Cet
2020-05-27 17:13                                                                                   ` Eli Zaretskii
2020-05-27 18:42                                                                                     ` Pip Cet
2020-05-27 19:19                                                                                       ` Eli Zaretskii
2020-05-23 17:32                                                                       ` Eli Zaretskii
2020-05-23 21:29                                                                         ` Pip Cet
2020-05-24 15:19                                                                           ` Eli Zaretskii
2020-05-23 12:47                                                                 ` Ligatures Stefan Monnier
2020-05-23 13:10                                                                   ` Ligatures Eli Zaretskii
2020-05-23 13:45                                                                     ` Ligatures Stefan Monnier
2020-05-23 14:12                                                                       ` Ligatures Eli Zaretskii
2020-05-23 13:36                                                                   ` Ligatures 조성빈
2020-05-23 14:15                                                                     ` Ligatures Stefan Monnier
2020-05-23 14:37                                                                   ` Ligatures Pip Cet
2020-05-22 11:44                                           ` Ligatures (was: Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY)) Eli Zaretskii
2020-05-22 13:26                                             ` Clément Pit-Claudel
2020-05-22 14:29                                               ` Eli Zaretskii
2020-05-22 14:32                                                 ` Clément Pit-Claudel
2020-05-22 19:00                                                   ` Eli Zaretskii
2020-05-21 21:06                                         ` Pip Cet
2020-05-22  6:06                                           ` Eli Zaretskii
2020-05-22  9:34                                             ` Pip Cet
2020-05-22 11:33                                               ` Eli Zaretskii
2020-05-19 20:26                           ` Alan Third
2020-05-19 10:09                   ` Trevor Spiteri
2020-05-19 14:22                     ` Eli Zaretskii
2020-05-19  5:43                 ` Ligatures ASSI
2020-05-19  7:22                   ` Ligatures tomas
2020-05-19  7:55                     ` Ligatures Joost Kremers
2020-05-19  8:07                       ` Ligatures tomas
2020-05-19 10:17                         ` Ligatures Yuri Khan
2020-05-19 14:26                           ` Ligatures Eli Zaretskii
2020-05-19 19:00                             ` Yuri Khan [this message]
2020-05-19 10:43                         ` Ligatures Werner LEMBERG
2020-05-19 10:48                           ` Ligatures tomas
2020-05-19 14:18                   ` Ligatures Eli Zaretskii
2020-05-19 14:52                     ` Ligatures Eli Zaretskii
2020-05-19 15:11                       ` Ligatures Pip Cet
2020-05-19 15:36                         ` Ligatures Eli Zaretskii
2020-05-19 16:16                           ` Ligatures Pip Cet
2020-05-19 16:41                             ` Ligatures Eli Zaretskii
2020-05-19 17:00                             ` Ligatures Eli Zaretskii
2020-05-17 18:28       ` Unify the Platforms: Cairo+FreeType+Harfbuzz Everywhere (except TTY) Julius Pfrommer
2020-05-17 18:45         ` Eli Zaretskii
2020-05-17 22:28         ` chad
2020-05-18 22:08         ` Alan Third

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