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Path: utzoo!mnetor!seismo!columbia!rutgers!ames!cit-vax!trent
From: trent@cit-vax.Caltech.Edu (Ray Trent)
Newsgroups: comp.emacs
Subject: Re: isearch-forward
Message-ID: <1267@cit-vax.Caltech.Edu>
Date: Wed, 3-Dec-86 02:01:32 EST
Article-I.D.: cit-vax.1267
Posted: Wed Dec  3 02:01:32 1986
Date-Received: Wed, 3-Dec-86 06:20:44 EST
References: <1381@umd5>
Reply-To: trent@cit-vax.UUCP (Ray Trent)
Organization: California Institute of Technology
Lines: 76
Keywords: global-set-key,"magic"

In article <1381@umd5> cgs@umd5 (Chris Sylvain) writes:

>I'd like to have CTRL-\ act the same way CTRL-S does with all the "magic"
>such as when it is typed more than once -- you can search for the string
>you searched for the last time. As it stands now, CTRL-\ just prompts for
>a new search string repeatedly. Can I do this with a macro, or do I have

The following is an elisp program that does what was requested. It
does its translation before the rest of gnuemacs sees the character,
so everything that worked with C-s and C-q now work with C-\ and C-^.
It was posted to the net a while ago...but since no one seems to
remember it, I thought I'd repost it. The documentation is pretty
self-explanatory.  As I remember, it was distributed under the terms
of the Gnu License. (q.v.)

--------------------cut here-------------------

;Kuling :/usr/alla/christer/emacs/xonxoff.el, Thu Apr 10 20:50:38 1986,
; Edit by: Christer Johansson (christer@kuling)
; Changed DOCSTRING of Xon-xoff-mode. Removed -*- line. 
;Edited: Tue Nov 19 1985 by christer@kuling (Christer Johansson)
; /usr/alla/christer/emacs/xonxoff.el Added variables C-{S,Q}-Replacement.
;Edited: Mon Nov 11 1985 by christer@kuling (Christer Johansson)
; /usr/alla/christer/emacs/xonxoff.el Works under ver. 16.60

;; Make the identity translation table.
(progn (setq keyboard-translate-table (make-string 128 0))
       (let ((i 0))
	 (while (< i 128)
	   (aset keyboard-translate-table i i)
	   (setq i (1+ i)))))

(defvar xon-xoff-mode t
  "Controls the xon-xoff mode.
If this variable is nil, xon-xoff-mode is off.")
       
(defun xon-xoff-mode (arg)
  "Xon-xoff mode's good if you want too use ^s and ^q for flow-control.
Turns Xon-xoff mode on if ARG > 0, off if ARG < 0.
With ARG = 0, Xon-xoff-mode toggles. 
If Xon-xoff-mode is on, all ^^ typed by the user will be translated to ^q
before they are interpreted in any way. Likewise ^\ will be translated to ^s.
If the options C-Q-Replacement and C-S-Replacement are set, there values will
be used instead of ^^ and ^\. ^q and ^s will be used for flow-controll in
xon-xoff-mode.
"
  (interactive "p")

  (setq xon-xoff-mode
	(if (and (zerop arg)
		 (boundp xon-xoff-mode))
	  (not xon-xoff-mode)
	  (> arg 0)))

  (set-input-mode nil xon-xoff-mode)

  (if xon-xoff-mode
      (progn (aset keyboard-translate-table
		   (if (boundp 'C-S-Replacement)
		       C-S-Replacement
		     ?\^^)
		   ?\^s)
	     (aset keyboard-translate-table 
		   (if (boundp 'C-Q-Replacement)
		       C-Q-Replacement
		     ?\^\\)
		   ?\^q))

    (aset keyboard-translate-table ?\^s ?\^s)
    (aset keyboard-translate-table ?\^q ?\^q)))

(xon-xoff-mode 1)
-- 
"A journey of a thousand miles..."
					../ray\..
 (trent@csvax.caltech.edu, rat@caltech.bitnet, ...seismo!cit-vax!trent)