code.delx.au - gnu-emacs/blob - lisp/term/vt100.el

   1 ;;; vt100.el --- define VT100 function key sequences in function-key-map
   2
   3 ;; Author: FSF
   4 ;; Keywords: terminals
   5
   6 ;; Copyright (C) 1989 Free Software Foundation, Inc.
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY.  No author or distributor
  12 ;; accepts responsibility to anyone for the consequences of using it
  13 ;; or for whether it serves any particular purpose or works at all,
  14 ;; unless he says so in writing.  Refer to the GNU Emacs General Public
  15 ;; License for full details.
  16
  17 ;; Everyone is granted permission to copy, modify and redistribute
  18 ;; GNU Emacs, but only under the conditions described in the
  19 ;; GNU Emacs General Public License.   A copy of this license is
  20 ;; supposed to have been given to you along with GNU Emacs so you
  21 ;; can know your rights and responsibilities.  It should be in a
  22 ;; file named COPYING.  Among other things, the copyright notice
  23 ;; and this notice must be preserved on all copies.
  24
  25 ;;; Commentary:
  26
  27 ;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
  28
  29 ;; Handles all VT100 clones, including the Apollo terminal.  Also handles
  30 ;; the VT200 --- its PF- and arrow- keys are different, but all those
  31 ;; are really set up by the terminal initialization code, which mines them
  32 ;; out of termcap.  This package is here to define the keypad comma, dash
  33 ;; and period (which aren't in termcap's repertoire) and the function for
  34 ;; changing from 80 to 132 columns & vv.
  35
  36 ;;; Code:
  37
  38 ;; CSI sequences - those that start with "\e[".
  39 ;; Termcap or terminfo should set these up automatically
  40 ;; (if (boundp 'vt100-CSI-prefix)
  41 ;;     nil
  42 ;;   (define-prefix-command 'vt100-CSI-prefix)
  43 ;;   (define-key function-key-map "\e[" 'vt100-CSI-prefix)
  44 ;;
  45 ;;   (define-key vt100-CSI-prefix "A" [up])
  46 ;;   (define-key vt100-CSI-prefix "B" [down])
  47 ;;   (define-key vt100-CSI-prefix "C" [right])
  48 ;;   (define-key vt100-CSI-prefix "D" [left])
  49 ;;   )
  50
  51 ;; SS3 sequences - those that start with "\eO".
  52 (if (boundp 'vt100-SS3-prefix)
  53     nil
  54   ;; The terminal initialization should already have set up some keys
  55   (setq vt100-SS3-prefix (lookup-key function-key-map "\eO"))
  56   (if (not (keymapp vt100-SS3-prefix))
  57       (error "What?  Your VT100 termcap/terminfo has no keycaps in it."))
  58
  59   ;; These will typically be set up automatically by termcap or terminfo
  60   ;;   (define-key vt100-SS3-prefix "A" [up]) ; up-arrow
  61   ;;   (define-key vt100-SS3-prefix "B" [down]) ; down-arrow
  62   ;;   (define-key vt100-SS3-prefix "C" [right]) ; right-arrow
  63   ;;   (define-key vt100-SS3-prefix "D" [left]) ; left-arrow
  64   ;;   (define-key vt100-SS3-prefix "P" [kp-f1]) ; PF1
  65   ;;   (define-key vt100-SS3-prefix "Q" [kp-f2]) ; PF2
  66   ;;   (define-key vt100-SS3-prefix "R" [kp-f3]) ; PF3
  67   ;;   (define-key vt100-SS3-prefix "S" [kp-f4]) ; PF4
  68
  69   ;; Terminfo might set these
  70   (define-key vt100-SS3-prefix "M" [kp-enter]) ; Enter
  71   (define-key vt100-SS3-prefix "p" [kp-0]) ; 0
  72   (define-key vt100-SS3-prefix "q" [kp-1]) ; 1
  73   (define-key vt100-SS3-prefix "r" [kp-2]) ; 2
  74   (define-key vt100-SS3-prefix "s" [kp-3]) ; 3
  75   (define-key vt100-SS3-prefix "t" [kp-4]) ; 4
  76   (define-key vt100-SS3-prefix "u" [kp-5]) ; 5
  77   (define-key vt100-SS3-prefix "v" [kp-6]) ; 6
  78   (define-key vt100-SS3-prefix "w" [kp-7]) ; 7
  79   (define-key vt100-SS3-prefix "x" [kp-8]) ; 8
  80   (define-key vt100-SS3-prefix "y" [kp-9]) ; 9
  81
  82   ;; Neither termcap nor terminfo will set these
  83   (define-key vt100-SS3-prefix "l" [kp-separator]) ; ,
  84   (define-key vt100-SS3-prefix "m" [kp-subtract]) ; -
  85   (define-key vt100-SS3-prefix "n" [kp-period]) ; .
  86   )
  87
  88 ;;; Controlling the screen width.
  89 (defconst vt100-wide-mode (= (frame-width) 132)
  90   "t if vt100 is in 132-column mode.")
  91
  92 (defun vt100-wide-mode (&optional arg)
  93   "Toggle 132/80 column mode for vt100s.
  94 With positive argument, switch to 132-column mode.
  95 With negative argument, switch to 80-column mode."
  96  (interactive "P")
  97  (setq vt100-wide-mode
  98         (if (null arg) (not vt100-wide-mode)
  99           (> (prefix-numeric-value arg) 0)))
 100  (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
 101  (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
 102
 103 ;;; vt100.el ends here