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bug#3237: marked as done (Bug report, going back to 22.1)

From: Emacs bug Tracking System
Subject: bug#3237: marked as done (Bug report, going back to 22.1)
Date: Sun, 21 Jun 2009 03:50:06 +0000 
Your message dated Sun, 21 Jun 2009 11:43:42 +0800
with message-id <4A3DAC6E.7020505@f2s.com>
and subject line Re: bug#3237: Bug report, going back to 22.1
has caused the Emacs bug report #3237,
regarding Bug report, going back to 22.1
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
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@emacsbugs.donarmstrong.com
immediately.)


-- 
3237: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3237
Emacs Bug Tracking System
Contact owner@emacsbugs.donarmstrong.com with problems
--- Begin Message --- Subject: Bug report, going back to 22.1 Date: Thu, 07 May 2009 19:14:21 +0200 User-agent: Thunderbird 2.0.0.19 (Windows/20081209) 
From:  <andrzejk@SV-STUD-0-93>
To: bug-gnu-emacs@gnu.org
Subject: keyboard
--text follows this line--

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

+++
After Emacs 22.1 Emacs does not recognize a change in the keyboard
setup under Windows XP. I have been using Emacs since version 20.3 to
write in Polish after declaring the Polish language for the keyboard
and after declaring cp1250-dos for the kayboard (and appropriately for the buffer involved). Polish "letters" are obtained using AltGr +key, or AltGr+Shift (right) +key. In particular, Emacs 22.3 has that bug, although retrospective testing showed that 22.1 
reacts properly.

This is a considerable impediment. I am looking forward to your help
+++++

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
m:/PClib/Emacs22.3/etc/DEBUG for instructions.


In GNU Emacs 22.3.1 (i386-mingw-nt5.1.2600)
 of 2008-09-06 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

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: NOR
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  display-time-mode: t
  iswitchb-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  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
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<menu-bar> <help-menu> <send-emacs-bug-report>

Recent messages:
Loading iswitchb...done
Loading time...done
Loading advice...done
Loading bytecomp...done
Loading paren...done
Loading m:/PClib/Emacs22.3/site-lisp/header/header.el (source)...done
Loading desktop...done
No desktop file.
For information about GNU Emacs and the GNU system, type C-h C-a.
Loading emacsbug...done

--- End Message ---
--- Begin Message --- Subject: Re: bug#3237: Bug report, going back to 22.1 Date: Sun, 21 Jun 2009 11:43:42 +0800 User-agent: Thunderbird 2.0.0.21 (Windows/20090302) 
Jason Rumney wrote:
Please explain what keys you press, what characters you expect to see, and what characters you do see. I have tried setting my keyboard to Polish (214) and pressing the keys indicated in the keymap at 
   http://ascii-table.com/img/keyboard-214.png
All of the keys that are present on my keyboard seem to work, but some of the characters you report above are missing from that keymap. Windows has another Polish keymap, but I can't find any documentation of which keys I need to press to get non-ASCII characters.
OK, I found the bug. The characters in question are in the range 128-159 in windows-1250. Since your system codepage is windows-1252, they are being interpreted by Emacs first as windows-1252 characters. These map to unicode codepoints above 255, so the keyboard-coding-system has no effect on them (they are outside the range expected by windows-1250).
Actually, this reveals that since the addition of multibyte keyboard handling in w32term.c, it will only work if the system codepage matches the keyboard locale, or if the system codepage is windows-1252 and the input characters are in the range 160-255 where their values will not be changed, and keyboard-coding-system can be used to postprocess them. Since this is a regression compared to the raw keyboard input of Emacs 22.1 and earlier which could always be post-processed by keyboard-coding-system, I have checked in the fix before the branch is created.

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