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−;;; vt100.el --- define VT100 function key sequences in function-key-map
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−
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−;; Copyright (C) 1989, 1993 Free Software Foundation, Inc.
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−
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−;; Author: FSF
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−;; Keywords: terminals
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−
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−;;; This file is part of GNU Emacs.
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−;;;
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−;;; GNU Emacs is free software; you can redistribute it and/or modify
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−;;; it under the terms of the GNU General Public License as published by
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−;;; the Free Software Foundation; either version 2, or (at your option)
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−;;; any later version.
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−;;;
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−;;; GNU Emacs is distributed in the hope that it will be useful,
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−;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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−;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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−;;; GNU General Public License for more details.
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−;;;
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−;;; You should have received a copy of the GNU General Public License
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−;;; along with GNU Emacs; see the file COPYING.  If not, write to
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−;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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−
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−;;; Synched up with: FSF 21.0.103.
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−
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−;;; Commentary:
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−
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−;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
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−
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−;; Handles all VT100 clones, including the Apollo terminal.  Also handles
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−;; the VT200 --- its PF- and arrow- keys are different, but all those
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−;; are really set up by the terminal initialization code, which mines them
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−;; out of termcap.  This package is here to define the keypad comma, dash
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−;; and period (which aren't in termcap's repertoire) and the function for
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−;; changing from 80 to 132 columns & vv.
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−
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−;;; Code:
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−
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−;; Set up function-key-map entries that termcap and terminfo don't know.
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−(load "term/lk201" nil t)
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−
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−;;; Controlling the screen width.
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−(defvar vt100-wide-mode (= (frame-width) 132)
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−  "t if vt100 is in 132-column mode.")
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−
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−(defun vt100-wide-mode (&optional arg)
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−  "Toggle 132/80 column mode for vt100s.
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−With positive argument, switch to 132-column mode.
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−With negative argument, switch to 80-column mode."
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− (interactive "P")
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− (setq vt100-wide-mode 
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−	(if (null arg) (not vt100-wide-mode)
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−	  (> (prefix-numeric-value arg) 0)))
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− (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
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− (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
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−
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−;;; vt100.el ends here