0
+ − 1 ;;; vt-control.el --- Common VTxxx control functions
+ − 2
+ − 3 ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
+ − 4
+ − 5 ;; Author: Rob Riepel <riepel@networking.stanford.edu>
+ − 6 ;; Maintainer: Rob Riepel <riepel@networking.stanford.edu>
+ − 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 2, or (at your option)
+ − 14 ;; 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; see the file COPYING. If not, write to
+ − 23 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ − 24
+ − 25 ;;; Commentary:
+ − 26
+ − 27 ;; The functions contained in this file send various VT control codes
+ − 28 ;; to the terminal where emacs is running. The following functions are
+ − 29 ;; available.
+ − 30
+ − 31 ;; Function Action
+ − 32
+ − 33 ;; vt-wide set wide screen (132 characters)
+ − 34 ;; vt-narrow set narrow screen (80 characters)
+ − 35 ;; vt-toggle-screen toggle wide/narrow screen
+ − 36 ;; vt-keypad-on set applications keypad on
+ − 37 ;; vt-keypad-off set applications keypad off
+ − 38 ;; vt-numlock toggle applications keypad on/off
+ − 39
+ − 40 ;;; Usage:
+ − 41
+ − 42 ;; To use enable these functions, simply load this file.
+ − 43
+ − 44 ;; Note: vt-control makes no effort to determine how the terminal is
+ − 45 ;; initially set. It assumes the terminal starts with a width
+ − 46 ;; of 80 characters and the applications keypad enabled. Nor
+ − 47 ;; does vt-control try to restore the terminal when emacs is
+ − 48 ;; killed or suspended.
+ − 49
+ − 50 ;;; Code:
+ − 51
+ − 52
+ − 53 ;;; Global variables
+ − 54
+ − 55 (defvar vt-applications-keypad-p t
+ − 56 "If non-nil, keypad is in applications mode.")
+ − 57
+ − 58 (defvar vt-wide-p nil
+ − 59 "If non-nil, the screen is 132 characters wide.")
+ − 60
+ − 61
+ − 62 ;;; Screen width functions.
+ − 63
+ − 64 (defun vt-wide nil
+ − 65 "Set the screen 132 characters wide."
+ − 66 (interactive)
+ − 67 (send-string-to-terminal "\e[?3h")
+ − 68 (set-frame-width (selected-frame) 132)
+ − 69 (setq vt-wide-p t))
+ − 70
+ − 71 (defun vt-narrow nil
+ − 72 "Set the screen 80 characters wide."
+ − 73 (interactive)
+ − 74 (send-string-to-terminal "\e[?3l")
+ − 75 (set-frame-width (selected-frame) 80)
+ − 76 (setq vt-wide-p nil))
+ − 77
+ − 78 (defun vt-toggle-screen nil
+ − 79 "Toggle between 80 and 132 character screen width."
+ − 80 (interactive)
+ − 81 (if vt-wide-p (vt-narrow) (vt-wide)))
+ − 82
+ − 83
+ − 84 ;;; Applications keypad functions.
+ − 85
+ − 86 (defun vt-keypad-on (&optional tell)
+ − 87 "Turn on the VT applications keypad."
+ − 88 (interactive)
+ − 89 (send-string-to-terminal "\e[\e=")
+ − 90 (setq vt-applications-keypad-p t)
+ − 91 (if (or tell (interactive-p)) (message "Applications keypad enabled.")))
+ − 92
+ − 93 (defun vt-keypad-off (&optional tell)
+ − 94 "Turn off the VT applications keypad."
+ − 95 (interactive "p")
+ − 96 (send-string-to-terminal "\e[\e>")
+ − 97 (setq vt-applications-keypad-p nil)
+ − 98 (if (or tell (interactive-p)) (message "Applications keypad disabled.")))
+ − 99
+ − 100 (defun vt-numlock nil
+ − 101 "Toggle VT application keypad on and off."
+ − 102 (interactive)
+ − 103 (if vt-applications-keypad-p (vt-keypad-off (interactive-p))
+ − 104 (vt-keypad-on (interactive-p))))
+ − 105
+ − 106 ;;; vt-control.el ends here
