compose-char is buggy on Windows

compose-char is buggy on Windows

[Peter De Wachter]

The compose-char function seems to have problems on Windows. For
example, if you try the following:

  (compose-region 1 5 (decode-char 'ucs #x221E))

Emacs should display the first few characters of the buffer as an
infinity symbol (Unicode #x221E). Instead, it produces some garbled
character. On GNU/Linux (both console and GTK interface), this works.

This happens for most but not all characters: if I try this trick with
a latin-1 character, it works right. For fancy Unicode symbols, it
never seems to work. This doesn't seem to depend on the font
used. 

In GNU Emacs 22.1.1 (i386-mingw-nt5.1.2600)
 of 2007-06-02 on RELEASE
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: NLB
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
M-x r e p o r t SPC e m SPC b SPC <return>

Recent messages:
("C:\\Documents and Settings\\Peter\\Bureaublad\\emacs-22.1\\bin\\emacs.exe")
Loading encoded-kb...done
For information about the GNU Project and its goals, type C-h C-p. [2 times]
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done

bug#251: marked as done (compose-char is buggy on Windows)

[Emacs bug Tracking System]

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Your message dated Fri, 01 Aug 2008 16:09:15 +0100
with message-id <4893271B.6080002@gnu.org>
and subject line Re: compose-char is buggy on Windows
has caused the Emacs bug report #251,
regarding compose-char is buggy on Windows
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
251: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=251
Emacs Bug Tracking System
Contact don@donarmstrong.com with problems

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From: "Peter De Wachter" <pdewacht@gmail.com>
To: bug-gnu-emacs@gnu.org
Subject: compose-char is buggy on Windows
Date: Sat, 05 Jan 2008 21:51:05 +0100
Message-ID: <87ve68f13a.wl%pdewacht@gmail.com>

The compose-char function seems to have problems on Windows. For
example, if you try the following:

  (compose-region 1 5 (decode-char 'ucs #x221E))

Emacs should display the first few characters of the buffer as an
infinity symbol (Unicode #x221E). Instead, it produces some garbled
character. On GNU/Linux (both console and GTK interface), this works.

This happens for most but not all characters: if I try this trick with
a latin-1 character, it works right. For fancy Unicode symbols, it
never seems to work. This doesn't seem to depend on the font
used. 

In GNU Emacs 22.1.1 (i386-mingw-nt5.1.2600)
 of 2007-06-02 on RELEASE
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: NLB
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
M-x r e p o r t SPC e m SPC b SPC <return>

Recent messages:
("C:\\Documents and Settings\\Peter\\Bureaublad\\emacs-22.1\\bin\\emacs.exe")
Loading encoded-kb...done
For information about the GNU Project and its goals, type C-h C-p. [2 times]
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done






[-- Attachment #3: Type: message/rfc822, Size: 2116 bytes --]

From: Jason Rumney <jasonr@gnu.org>
To: 251-done@emacsbugs.donarmstrong.com
Cc: cdutchyn@cs.ubc.ca, pdewacht@gmail.com
Subject: Re: compose-char is buggy on Windows
Date: Fri, 01 Aug 2008 16:09:15 +0100
Message-ID: <4893271B.6080002@gnu.org>

> The compose-char function seems to have problems on Windows. For
> example, if you try the following:
> 
>   (compose-region 1 5 (decode-char 'ucs #x221E))
> 
> Emacs should display the first few characters of the buffer as an
> infinity symbol (Unicode #x221E). Instead, it produces some garbled
> character.

This bug has been fixed for 22.3.