lisp/term/vt100.el

   1 ;;; vt100.el --- define VT100 function key sequences in function-key-map
   2
   3 ;; Copyright (C) 1989, 1993 Free Software Foundation, Inc.
   4
   5 ;; Author: FSF
   6 ;; Keywords: terminals
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  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 ;; Set up function-key-map entries that termcap and terminfo don't know.
  39 (load "term/lk201" nil t)
  40
  41 ;;; Controlling the screen width.
  42 (defvar vt100-wide-mode (= (frame-width) 132)
  43   "t if vt100 is in 132-column mode.")
  44
  45 (defun vt100-wide-mode (&optional arg)
  46   "Toggle 132/80 column mode for vt100s.
  47 With positive argument, switch to 132-column mode.
  48 With negative argument, switch to 80-column mode."
  49  (interactive "P")
  50  (setq vt100-wide-mode
  51         (if (null arg) (not vt100-wide-mode)
  52           (> (prefix-numeric-value arg) 0)))
  53  (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
  54  (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
  55
  56 ;;; vt100.el ends here