1;;; vt-control.el --- Common VTxxx control functions 2 3;; Copyright (C) 1993, 1994, 2001, 2002, 2003, 4;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 5 6;; Author: Rob Riepel <riepel@networking.stanford.edu> 7;; Maintainer: Rob Riepel <riepel@networking.stanford.edu> 8;; Keywords: terminals 9 10;; This file is part of GNU Emacs. 11 12;; GNU Emacs is free software; you can redistribute it and/or modify 13;; it under the terms of the GNU General Public License as published by 14;; the Free Software Foundation; either version 2, or (at your option) 15;; any later version. 16 17;; GNU Emacs is distributed in the hope that it will be useful, 18;; but WITHOUT ANY WARRANTY; without even the implied warranty of 19;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20;; GNU General Public License for more details. 21 22;; You should have received a copy of the GNU General Public License 23;; along with GNU Emacs; see the file COPYING. If not, write to the 24;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 25;; Boston, MA 02110-1301, USA. 26 27;;; Commentary: 28 29;; The functions contained in this file send various VT control codes 30;; to the terminal where emacs is running. The following functions are 31;; available. 32 33;; Function Action 34 35;; vt-wide set wide screen (132 characters) 36;; vt-narrow set narrow screen (80 characters) 37;; vt-toggle-screen toggle wide/narrow screen 38;; vt-keypad-on set applications keypad on 39;; vt-keypad-off set applications keypad off 40;; vt-numlock toggle applications keypad on/off 41 42;;; Usage: 43 44;; To use enable these functions, simply load this file. 45 46;; Note: vt-control makes no effort to determine how the terminal is 47;; initially set. It assumes the terminal starts with a width 48;; of 80 characters and the applications keypad enabled. Nor 49;; does vt-control try to restore the terminal when emacs is 50;; killed or suspended. 51 52;;; Code: 53 54 55;;; Global variables 56 57(defvar vt-applications-keypad-p t 58 "If non-nil, keypad is in applications mode.") 59 60(defvar vt-wide-p nil 61 "If non-nil, the screen is 132 characters wide.") 62 63 64;;; Screen width functions. 65 66(defun vt-wide nil 67 "Set the screen 132 characters wide." 68 (interactive) 69 (send-string-to-terminal "\e[?3h") 70 (set-frame-width (selected-frame) 132) 71 (setq vt-wide-p t)) 72 73(defun vt-narrow nil 74 "Set the screen 80 characters wide." 75 (interactive) 76 (send-string-to-terminal "\e[?3l") 77 (set-frame-width (selected-frame) 80) 78 (setq vt-wide-p nil)) 79 80(defun vt-toggle-screen nil 81 "Toggle between 80 and 132 character screen width." 82 (interactive) 83 (if vt-wide-p (vt-narrow) (vt-wide))) 84 85 86;;; Applications keypad functions. 87 88(defun vt-keypad-on (&optional tell) 89 "Turn on the VT applications keypad." 90 (interactive) 91 (send-string-to-terminal "\e=") 92 (setq vt-applications-keypad-p t) 93 (if (or tell (interactive-p)) (message "Applications keypad enabled."))) 94 95(defun vt-keypad-off (&optional tell) 96 "Turn off the VT applications keypad." 97 (interactive "p") 98 (send-string-to-terminal "\e>") 99 (setq vt-applications-keypad-p nil) 100 (if (or tell (interactive-p)) (message "Applications keypad disabled."))) 101 102(defun vt-numlock nil 103 "Toggle VT application keypad on and off." 104 (interactive) 105 (if vt-applications-keypad-p (vt-keypad-off (interactive-p)) 106 (vt-keypad-on (interactive-p)))) 107 108(provide 'vt-control) 109 110;;; arch-tag: d4fed1bf-2524-4ba1-a4fe-86bca3d928a2 111;;; vt-control.el ends here 112