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

   1 ;;; vt100.el --- define VT100 function key sequences in function-key-map
   2
   3 ;; Copyright (C) 1989, 1993, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
   5
   6 ;; Author: FSF
   7 ;; Keywords: terminals
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
  27
  28 ;; Handles all VT100 clones, including the Apollo terminal.  Also handles
  29 ;; the VT200 --- its PF- and arrow- keys are different, but all those
  30 ;; are really set up by the terminal initialization code, which mines them
  31 ;; out of termcap.  This package is here to define the keypad comma, dash
  32 ;; and period (which aren't in termcap's repertoire) and the function for
  33 ;; changing from 80 to 132 columns & vv.
  34
  35 ;;; Code:
  36
  37 ;; Set up function-key-map entries that termcap and terminfo don't know.
  38
  39 (defun terminal-init-vt100 ()
  40   "Terminal initialization function for vt100."
  41   (tty-run-terminal-initialization (selected-frame) "lk201"))
  42
  43 ;;; Controlling the screen width.
  44 (defvar vt100-wide-mode (= (frame-width) 132)
  45   "t if vt100 is in 132-column mode.")
  46
  47 (defun vt100-wide-mode (&optional arg)
  48   "Toggle 132/80 column mode for vt100s.
  49 With positive argument, switch to 132-column mode.
  50 With negative argument, switch to 80-column mode."
  51  (interactive "P")
  52  (setq vt100-wide-mode
  53         (if (null arg) (not vt100-wide-mode)
  54           (> (prefix-numeric-value arg) 0)))
  55  (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
  56  (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
  57
  58 ;; arch-tag: 9ff41f24-a7c9-4dee-9cf2-fbaa951eb840
  59 ;;; vt100.el ends here