mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2026-01-30 04:10:54 -08:00
Code Issues Projects Releases Wiki Activity

(enable-flow-control): Use prefix argument like minor modes.

Browse source 
(enable-flow-control-memstr=): Function deleted.
(enable-flow-control-on): Use member instead.
(flow-control-c-q-replacement, flow-control-c-s-replacement): New vars.
This commit is contained in:
Richard M. Stallman 1994-01-08 10:04:22 +00:00
parent 7d606649fe
commit 162de1825d
1 changed files with 48 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

81
lisp/flow-ctrl.el
View file

@ -44,39 +44,54 @@
;;; Code:
;;;###autoload
(defun enable-flow-control ()
"Enable use of flow control; let user type C-s as C-\\ and C-q as C-^."
(interactive)
;; Tell emacs to pass C-s and C-q to OS.
(set-input-mode nil t (nth 2 (current-input-mode)))
;; Initialize translate table, saving previous mappings, if any.
(let ((the-table (make-string 128 0)))
(let ((i 0)
(j (length keyboard-translate-table)))
(while (< i j)
(aset the-table i (elt keyboard-translate-table i))
(setq i (1+ i)))
(while (< i 128)
(aset the-table i i)
(setq i (1+ i))))
(setq keyboard-translate-table the-table))
;; Swap C-s and C-\
(aset keyboard-translate-table ?\034 ?\^s)
(aset keyboard-translate-table ?\^s ?\034)
;; Swap C-q and C-^
(aset keyboard-translate-table ?\036 ?\^q)
(aset keyboard-translate-table ?\^q ?\036)
(message (concat
"XON/XOFF adjustment for "
(getenv "TERM")
": use C-\\ for C-s and use C-^ for C-q."))
(sleep-for 2)) ; Give user a chance to see message.
(defvar flow-control-c-s-replacement ?\034
"Character that replaces C-s, when flow control handling is enabled.")
(defvar flow-control-c-q-replacement ?\036
"Character that replaces C-q, when flow control handling is enabled.")
(defun enable-flow-control-memstr= (e s)
(cond ((null s) nil)
((string= e (car s)) t)
(t (enable-flow-control-memstr= e (cdr s)))))
;;;###autoload
(defun enable-flow-control (&optional argument)
"Toggle flow control handling.
When handling is enabled, user can type C-s as C-\\, and C-q as C-^.
With arg, enable flow control mode if arg is positive, otherwise disable."
(interactive "P")
(if (if argument
;; Argument means enable if arg is positive.
(<= (prefix-numeric-value argument) 0)
;; No arg means toggle.
(nth 1 (current-input-mode)))
(progn
;; Turn flow control off, and stop exchanging chars.
(set-input-mode t nil (nth 2 (current-input-mode)))
(aset keyboard-translate-table flow-control-c-s-replacement nil)
(aset keyboard-translate-table ?\^s nil)
(aset keyboard-translate-table flow-control-c-q-replacement nil)
(aset keyboard-translate-table ?\^q nil))
;; Turn flow control on.
;; Tell emacs to pass C-s and C-q to OS.
(set-input-mode nil t (nth 2 (current-input-mode)))
;; Initialize translate table, saving previous mappings, if any.
(let ((the-table (make-string 128 0)))
(let ((i 0)
(j (length keyboard-translate-table)))
(while (< i j)
(aset the-table i (elt keyboard-translate-table i))
(setq i (1+ i)))
(while (< i 128)
(aset the-table i i)
(setq i (1+ i))))
(setq keyboard-translate-table the-table))
;; Swap C-s and C-\
(aset keyboard-translate-table flow-control-c-s-replacement ?\^s)
(aset keyboard-translate-table ?\^s flow-control-c-s-replacement)
;; Swap C-q and C-^
(aset keyboard-translate-table flow-control-c-q-replacement ?\^q)
(aset keyboard-translate-table ?\^q flow-control-c-q-replacement)
(message (concat
"XON/XOFF adjustment for "
(getenv "TERM")
": use C-\\ for C-s and use C-^ for C-q."))
(sleep-for 2))) ; Give user a chance to see message.
;;;###autoload
(defun enable-flow-control-on (&rest losing-terminal-types)
@ -90,7 +105,7 @@ to get the effect of a C-q."
;; Strip off hyphen and what follows
(while (setq hyphend (string-match "[-_][^-_]+$" term))
(setq term (substring term 0 hyphend)))
(and (enable-flow-control-memstr= term losing-terminal-types)
(and (member term losing-terminal-types)
(enable-flow-control))))
(provide 'flow-ctrl)