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1 ;;; vt100.el --- define VT100 function key sequences in function-key-map
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2
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3 ;; Author: FSF
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4 ;; Keywords: terminals
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5
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6 ;; Copyright (C) 1989, 1993 Free Software Foundation, Inc.
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7 ;;; This file is part of GNU Emacs.
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8 ;;;
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9 ;;; GNU Emacs is free software; you can redistribute it and/or modify
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10 ;;; it under the terms of the GNU General Public License as published by
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11 ;;; the Free Software Foundation; either version 2, or (at your option)
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12 ;;; any later version.
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13 ;;;
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14 ;;; GNU Emacs is distributed in the hope that it will be useful,
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15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ;;; GNU General Public License for more details.
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18 ;;;
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19 ;;; You should have received a copy of the GNU General Public License
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20 ;;; along with GNU Emacs; see the file COPYING. If not, write to
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21 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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22
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23 ;;; Commentary:
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24
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25 ;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
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26
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27 ;; Handles all VT100 clones, including the Apollo terminal. Also handles
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28 ;; the VT200 --- its PF- and arrow- keys are different, but all those
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29 ;; are really set up by the terminal initialization code, which mines them
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30 ;; out of termcap. This package is here to define the keypad comma, dash
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31 ;; and period (which aren't in termcap's repertoire) and the function for
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32 ;; changing from 80 to 132 columns & vv.
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33
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34 ;;; Code:
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35
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36 ;; Set up function-key-map entries that termcap and terminfo don't know.
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37 (load "term/lk201" nil t)
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38
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39 ;;; Controlling the screen width.
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40 (defconst vt100-wide-mode (= (frame-width) 132)
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41 "t if vt100 is in 132-column mode.")
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42
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43 (defun vt100-wide-mode (&optional arg)
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44 "Toggle 132/80 column mode for vt100s.
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45 With positive argument, switch to 132-column mode.
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46 With negative argument, switch to 80-column mode."
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47 (interactive "P")
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48 (setq vt100-wide-mode
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49 (if (null arg) (not vt100-wide-mode)
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50 (> (prefix-numeric-value arg) 0)))
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51 (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
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52 (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
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53
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54 ;;; vt100.el ends here
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