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emacs/lisp/term/vt100.el
1992-07-15 03:24:58 +00:00

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;;;; Define VT100 function key escape sequences in function-key-map.
;;; CSI sequences - those that start with "\e[".
(define-prefix-command 'vt100-CSI-prefix)
(define-key function-key-map "\e[" 'vt100-CSI-prefix)
(define-key vt100-CSI-prefix "A" [up])
(define-key vt100-CSI-prefix "B" [down])
(define-key vt100-CSI-prefix "C" [right])
(define-key vt100-CSI-prefix "D" [left])
(defun enable-arrow-keys ()
"Enable the use of the VT100 arrow keys for cursor motion.
Because of the nature of the VT100, this unavoidably breaks
the standard Emacs command ESC [; therefore, it is not done by default,
but only if you give this command."
(interactive)
(global-unset-key "\e["))
;;; SS3 sequences - those that start with "\eO".
(define-prefix-command 'vt100-SS3-prefix)
(define-key function-key-map "\eO" 'vt100-SS3-prefix)
(define-key vt100-SS3-prefix "A" [up])
(define-key vt100-SS3-prefix "B" [down]) ; down-arrow
(define-key vt100-SS3-prefix "C" [right]) ; right-arrow
(define-key vt100-SS3-prefix "D" [left]) ; left-arrow
(define-key vt100-SS3-prefix "M" [kp-enter]) ; Enter
(define-key vt100-SS3-prefix "P" [kp-f1]) ; PF1
(define-key vt100-SS3-prefix "Q" [kp-f2]) ; PF2
(define-key vt100-SS3-prefix "R" [kp-f3]) ; PF3
(define-key vt100-SS3-prefix "S" [kp-f4]) ; PF4
(define-key vt100-SS3-prefix "l" [kp-separator]) ; ,
(define-key vt100-SS3-prefix "m" [kp-subtract]) ; -
(define-key vt100-SS3-prefix "n" [kp-period]) ; .
(define-key vt100-SS3-prefix "p" [kp-0]) ; 0
(define-key vt100-SS3-prefix "q" [kp-1]) ; 1
(define-key vt100-SS3-prefix "r" [kp-2]) ; 2
(define-key vt100-SS3-prefix "s" [kp-3]) ; 3
(define-key vt100-SS3-prefix "t" [kp-4]) ; 4
(define-key vt100-SS3-prefix "u" [kp-5]) ; 5
(define-key vt100-SS3-prefix "v" [kp-6]) ; 6
(define-key vt100-SS3-prefix "w" [kp-7]) ; 7
(define-key vt100-SS3-prefix "x" [kp-8]) ; 8
(define-key vt100-SS3-prefix "y" [kp-9]) ; 9
;;; Controlling the screen width.
(defconst vt100-wide-mode (= (frame-width) 132)
"t if vt100 is in 132-column mode.")
(defun vt100-wide-mode (&optional arg)
"Toggle 132/80 column mode for vt100s."
(interactive "P")
(setq vt100-wide-mode
(if (null arg) (not vt100-wide-mode)
(> (prefix-numeric-value arg) 0)))
(send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
(set-frame-width (if vt100-wide-mode 132 80)))