bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

[Joseph Mingrone]

I bind C-c i to a custom function, but when I'm in a term buffer C-c i is
bound to ido-insert-file.  When I asked about this in #emacs on freenode
I was told to report a bug.


In GNU Emacs 24.2.1 (i386-portbld-freebsd8.3)
 of 2012-09-17 on gly.ath.cx
Configured using:
 `configure '--localstatedir=/var' '--without-x' '--without-sound'
 '--without-dbus' '--without-xml2' '--without-gnutls'
 '--prefix=/usr/local' '--mandir=/usr/local/man'
 '--infodir=/usr/local/info/' '--build=i386-portbld-freebsd8.3'
 'build_alias=i386-portbld-freebsd8.3' 'CC=cc' 'CFLAGS=-O2 -pipe
 -fno-strict-aliasing' 'LDFLAGS= -L/usr/local/lib
 -rpath=/usr/lib:/usr/local/lib' 'CPPFLAGS=-I/usr/local/include'
 'CPP=cpp''

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_CA.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Help

Minor modes in effect:
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  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
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Recent input:
SPC SPC H a v e SPC a SPC g o o d SPC n i g h t . RET 
C-x o C-p C-p RET C-x k RET ESC x r e p TAB o TAB r 
TAB RET C - c SPC i SPC i s DEL DEL b o u n d SPC t 
o SPC c u s t o m e SPC DEL DEL SPC f u n c t i o n 
, SPC b u t SPC i n SPC t e r m SPC DEL DEL DEL DEL 
DEL a SPC t e r m SPC b u f f e r SPC i t SPC g e t 
s SPC b o u n d SPC t o SPC C-y DEL DEL DEL DEL DEL 
DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL 
DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL 
C-x o C-x o C-c n C-x h k C-c i C-x o i d o - f i n 
d - i l DEL DEL f i l e RET C-x o C-x C-f C-g C-c n 
C-x h k C-c i C-x b RET C-x o C-x b C-s RET C-p C-p 
C-p C-f C-e DEL DEL DEL DEL DEL DEL DEL DEL DEL DEL 
DEL DEL DEL i d o - i n s e r t - f i l e C-a C-n C-n 
C-n C-n C-p C-p C-n C-n C-n C-n C-n C-n C-n C-n C-n 
ESC > ESC < C-n C-n C-f C-f C-f C-f C-f C-f C-f C-f 
C-f C-@ C-e ESC w C-x o C-x o C-x k RET y e s RET ESC 
x r e p o r TAB RET

Recent messages:
Checking 148 files in /usr/local/share/emacs/24.2/lisp/emacs-lisp...
Checking 24 files in /usr/local/share/emacs/24.2/lisp/cedet...
Checking 57 files in /usr/local/share/emacs/24.2/lisp/calendar...
Checking 87 files in /usr/local/share/emacs/24.2/lisp/calc...
Checking 65 files in /usr/local/share/emacs/24.2/lisp/obsolete...
Checking 1 files in /usr/local/share/emacs/24.2/leim...
Checking for load-path shadows...done
Quit
Type "q" in help window to restore its previous buffer.
Mark set [3 times]

Load-path shadows:
/home/jrm/.emacs.d/elpa/multi-eshell-0.0.1/multi-eshell hides ~/.elisp/multi-eshell
/home/jrm/.emacs.d/elpa/rainbow-delimiters-1.3.4/rainbow-delimiters hides ~/.elisp/rainbow-delimiters
/home/jrm/.emacs.d/elpa/multi-term-0.8.8/multi-term hides ~/.elisp/multi-term

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erc-spelling flyspell ispell auctex-autoloads tex-site info
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bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

[Glenn Morris]

Joseph Mingrone wrote:

> I bind C-c i to a custom function, but when I'm in a term buffer C-c i is
> bound to ido-insert-file. 

Nothing to do with ido, really, which just remaps insert-file.

emacs -Q -f term
bash RET

Now `C-c i' is bound to insert-file. I guess this is because
term-escape-char = C-c, and term-raw-escape-map has Control-X-prefix as
parent keymap. I don't know what, if anything, to do about this.

bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

[Leo Liu]

On 2012-11-24 11:43 +0800, Glenn Morris wrote:
> Now `C-c i' is bound to insert-file. I guess this is because
> term-escape-char = C-c, and term-raw-escape-map has Control-X-prefix as
> parent keymap. I don't know what, if anything, to do about this.

I consider this not a bug.

This is how term.el works because it has drastically different key
bindings. Thus it gives the user C-c to invoke those critical commands
on the C-x prefix, or you will be trapped in term-mode forever.
User-defined commands are secondary in this scenario.

Leo

bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

[Josh]

On Thu, Jul 11, 2013 at 6:52 PM, Leo Liu <sdl.web@gmail.com> wrote:
> On 2012-11-24 11:43 +0800, Glenn Morris wrote:
>> Now `C-c i' is bound to insert-file. I guess this is because
>> term-escape-char = C-c, and term-raw-escape-map has Control-X-prefix as
>> parent keymap. I don't know what, if anything, to do about this.
>
> I consider this not a bug.

I certainly do.  From (info "(elisp) Key Binding Conventions") :

     * Don't define `C-c LETTER' as a key in Lisp programs.  Sequences
       consisting of `C-c' and a letter (either upper or lower case) are
       reserved for users; they are the *only* sequences reserved for
       users, so do not block them.

       Changing all the Emacs major modes to respect this convention was a
       lot of work; abandoning this convention would make that work go to
       waste, and inconvenience users.  Please comply with it.

> This is how term.el works because it has drastically different key
> bindings. Thus it gives the user C-c to invoke those critical commands
> on the C-x prefix, or you will be trapped in term-mode forever.

Several of the commands that term.el binds to C-c <letter> are
anything but critical, e.g. set-fill-column (C-c f) and
count-lines-page (C-c l).  Furthermore, as for being "trapped
forever," I see no reason for C-c in particular to be appropriated for
this purpose instead of some other control character that would leave
users' bindings intact, or even moving `ctl-x-map' from C-c to C-c
C-x, though this would be more effort to implement.

> User-defined commands are secondary in this scenario.

The passage I cited refers to "all the Emacs major modes".  Is there
any reason to believe that term.el should be exempt from adhering to
this convention?

bug#12976: 24.2; C-c i is bound to custom function, but in a term buffer it gets bound to ido-insert-file

[Lars Ingebrigtsen]

Josh <josh@foxtail.org> writes:

>> I consider this not a bug.
>
> I certainly do.  From (info "(elisp) Key Binding Conventions") :
>
>      * Don't define `C-c LETTER' as a key in Lisp programs.  Sequences
>        consisting of `C-c' and a letter (either upper or lower case) are
>        reserved for users; they are the *only* sequences reserved for
>        users, so do not block them.

[...]

> The passage I cited refers to "all the Emacs major modes".  Is there
> any reason to believe that term.el should be exempt from adhering to
> this convention?

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

It's an oddball mode, and it breaks many Emacs conventions.  In any
case, this isn't something we can change at this point, since the `C-c'
key bindings are ingrained at this point.  (You can change
`term-escape-char' if you want, though.)

So I'm reclosing this bug report as a WONTFIX.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no