Search for chars requiring "Alt Gr" keyboard modifier

Search for chars requiring "Alt Gr" keyboard modifier

[Enrique Perez-Terron]

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In GNU Emacs 21.3.1 (i386-redhat-linux-gnu, X toolkit, Xaw3d scroll
bars)
 of 2004-10-18 on tweety.build.redhat.com
configured using `configure  --build=i386-redhat-linux --host=i386-
redhat-linux --target=i386-redhat-linux-gnu --program-prefix= --
prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --
sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --
libdir=/usr/lib --libexecdir=/usr/libexec --localstatedir=/var --
sharedstatedir=/usr/com --mandir=/usr/share/man --
infodir=/usr/share/info --with-pop --with-sound'
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: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

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

I want to use the incremental search command (bound to ^S) to search
for a string starting with the "@" character. On my Norwegian 
keyboard, this character requires the key combination "Alt Gr" + "2".
(By "Alt Gr" I mean the key that was formerly known as "Mode Switch",
currently I think it is called ISO-Level-2 or something similar.  I
have a GNU/Linux system -- Fedora Core 3 -- running on an AMD K6-2 (i586
clone).)

But as soon as I press the "Alt Gr" key, the "Search:" prompt
disappears from the message line, and it appears that the Search
command has been terminated, just like when I press e.g., an
arrow key. When I subsequently type hit the "2" key, I get the message
"Buffer is read-only", indicating that Emacs is running the self-insert
command instead of incremental search.

Eventually I was able to do the search because I located the first
occurrence manually, and used the ^S ^W keys to have Emacs search for
the next occurrence, but when I subsequently moved to another buffer
and needed to find the "@" character there, there was no way to do it,
short of typing the search string in a scratch buffer, searching for
it using ^S ^W, and then repeating the search in the target buffer (^S
^S).

Recent input:
C-s C-s <down-mouse-1> <mouse-1> C-x C-f / t m p <tab> 
u n i <tab> <tab> <tab> <return> <down-mouse-1> <mouse-1> 
C-x 1 M-< C-s <key-3> @ C-g C-g C-g C-s <key-3> @ <down> 
<down> <down> <up> <up> <up> <down-mouse-1> <mouse-movement> 
<drag-mouse-1> <right> <right> <left> <left> C-g <right> 
<left> C-s C-w C-s C-r C-r <return> C-s C-w C-w C-w 
C-s C-s C-s C-s C-s C-s C-s <down-mouse-1> <mouse-1> 
C-s C-w C-w C-w C-s C-s C-s C-s C-s C-s C-s C-s C-s 
C-s C-s C-s <menu-bar> <buffer> "af_unix.c" M-< C-s 
<key-3> C-s <key-3> @ <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
Note: file is write protected
Mark set
Buffer is read-only: #<buffer unix>
keyboard-quit: Quit [3 times]
Buffer is read-only: #<buffer unix>
keyboard-quit: Quit
Mark saved where search started [2 times]
Mark set
Buffer is read-only: #<buffer af_unix.c>
Loading emacsbug...done

Re: Search for chars requiring "Alt Gr" keyboard modifier

[Kevin Rodgers]

Enrique Perez-Terron wrote:
 > I want to use the incremental search command (bound to ^S) to search
 > for a string starting with the "@" character. On my Norwegian
 > keyboard, this character requires the key combination "Alt Gr" + "2".
 > (By "Alt Gr" I mean the key that was formerly known as "Mode Switch",
 > currently I think it is called ISO-Level-2 or something similar.  I
 > have a GNU/Linux system -- Fedora Core 3 -- running on an AMD K6-2 (i586
 > clone).)
 >
 > But as soon as I press the "Alt Gr" key, the "Search:" prompt
 > disappears from the message line, and it appears that the Search
 > command has been terminated, just like when I press e.g., an
 > arrow key. When I subsequently type hit the "2" key, I get the message
 > "Buffer is read-only", indicating that Emacs is running the self-insert
 > command instead of incremental search.
 >
 > Eventually I was able to do the search because I located the first
 > occurrence manually, and used the ^S ^W keys to have Emacs search for
 > the next occurrence, but when I subsequently moved to another buffer
 > and needed to find the "@" character there, there was no way to do it,
 > short of typing the search string in a scratch buffer, searching for
 > it using ^S ^W, and then repeating the search in the target buffer (^S
 > ^S).

Since @ is character 64 in ASCII, ISO 8859-N, and Unicode, I'm sure you
can search for it via its octal code: C-s C-q 100 RET

But you could try setting search-exit-option to nil, or binding the
AltGr key to somthing (nil, or perhaps its global binding) in
isearch-mode-map.

-- 
Kevin Rodgers