GNU bug report logs - #40502
28.0.50; Hangul Jamo conjoining characters are not composed

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Robert Pluim <rpluim <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#40502: closed (28.0.50; Hangul Jamo conjoining characters are
 not composed)
Date: Wed, 08 Apr 2020 10:13:02 +0000

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Your message dated Wed, 08 Apr 2020 12:11:56 +0200
with message-id <m2wo6qs2vn.fsf <at> gmail.com>
and subject line Re: bug#40502: 28.0.50; Hangul Jamo conjoining characters are not composed
has caused the debbugs.gnu.org bug report #40502,
regarding 28.0.50; Hangul Jamo conjoining characters are not composed
to be marked as done.

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From: Robert Pluim <rpluim <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Hangul Jamo conjoining characters are not composed
Date: Wed, 08 Apr 2020 11:28:25 +0200

According to Unicode 13 Chapter 18.6, Hangul Jamo characters should be
composed into the corresponding pre-composed Hangul characters. Iʼm
not seeing this, e.g

하 (U+1112 U+1161) should be displayed as 하 (U+D558), but is shown as
two separate glyphs (all using Apple SD Gothic Neo)

(set-char-table-range composition-function-table
                      #x1112
                      (list (vector "..")
                            0
                            'compose-gstring-for-graphic))

does not help.

This is:

In GNU Emacs 28.0.50 (build 127, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G4032))
 of 2020-04-02 built on rpluim-mac

although I see the same in a Cairo+HarfBuzz build on GNU/Linux.

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From: Robert Pluim <rpluim <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 40502-done <at> debbugs.gnu.org
Subject: Re: bug#40502: 28.0.50; Hangul Jamo conjoining characters are not
 composed
Date: Wed, 08 Apr 2020 12:11:56 +0200

>>>>> On Wed, 08 Apr 2020 12:55:19 +0300, Eli Zaretskii <eliz <at> gnu.org> said:

    >> From: Robert Pluim <rpluim <at> gmail.com>
    >> Date: Wed, 08 Apr 2020 11:28:25 +0200
    >> 
    >> According to Unicode 13 Chapter 18.6, Hangul Jamo characters should be
    >> composed into the corresponding pre-composed Hangul characters. Iʼm
    >> not seeing this, e.g
    >> 
    >> 하 (U+1112 U+1161) should be displayed as 하 (U+D558), but is shown as
    >> two separate glyphs (all using Apple SD Gothic Neo)

    Eli> I hope I've just fixed that on the master branch, please take a look.

Yes, on both macOS and GNU/Linux, including the three character
variant (I tested with U+1112 U+1161 U+11AB).

    >> (set-char-table-range composition-function-table
    >> #x1112
    >> (list (vector "..")
    >> 0
    >> 'compose-gstring-for-graphic))
    >> 
    >> does not help.

    Eli> The call is incorrect: 'vector' should include both 0 and the function
    Eli> symbol.

Yes. I misread the docstring of composition-function-table rather than
copying the correct call I had sitting in a buffer already.

Closing.

Robert

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