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- ;;; vt-control.el --- Common VTxxx control functions
-
- ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
-
- ;; Author: Rob Riepel <riepel@networking.stanford.edu>
- ;; Maintainer: Rob Riepel <riepel@networking.stanford.edu>
- ;; Keywords: terminals
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; The functions contained in this file send various VT control codes
- ;; to the terminal where emacs is running. The following functions are
- ;; available.
-
- ;; Function Action
-
- ;; vt-wide set wide screen (132 characters)
- ;; vt-narrow set narrow screen (80 characters)
- ;; vt-toggle-screen toggle wide/narrow screen
- ;; vt-keypad-on set applications keypad on
- ;; vt-keypad-off set applications keypad off
- ;; vt-numlock toggle applications keypad on/off
-
- ;;; Usage:
-
- ;; To use enable these functions, simply load this file.
-
- ;; Note: vt-control makes no effort to determine how the terminal is
- ;; initially set. It assumes the terminal starts with a width
- ;; of 80 characters and the applications keypad enabled. Nor
- ;; does vt-control try to restore the terminal when emacs is
- ;; killed or suspended.
-
- ;;; Code:
-
-
- ;;; Global variables
-
- (defvar vt-applications-keypad-p t
- "If non-nil, keypad is in applications mode.")
-
- (defvar vt-wide-p nil
- "If non-nil, the screen is 132 characters wide.")
-
-
- ;;; Screen width functions.
-
- (defun vt-wide nil
- "Set the screen 132 characters wide."
- (interactive)
- (send-string-to-terminal "\e[?3h")
- (set-screen-width 132)
- (setq vt-wide-p t))
-
- (defun vt-narrow nil
- "Set the screen 80 characters wide."
- (interactive)
- (send-string-to-terminal "\e[?3l")
- (set-screen-width 80)
- (setq vt-wide-p nil))
-
- (defun vt-toggle-screen nil
- "Toggle between 80 and 132 character screen width."
- (interactive)
- (if vt-wide-p (vt-narrow) (vt-wide)))
-
-
- ;;; Applications keypad functions.
-
- (defun vt-keypad-on (&optional tell)
- "Turn on the VT applications keypad."
- (interactive)
- (send-string-to-terminal "\e=")
- (setq vt-applications-keypad-p t)
- (if (or tell (interactive-p)) (message "Applications keypad enabled.")))
-
- (defun vt-keypad-off (&optional tell)
- "Turn off the VT applications keypad."
- (interactive "p")
- (send-string-to-terminal "\e>")
- (setq vt-applications-keypad-p nil)
- (if (or tell (interactive-p)) (message "Applications keypad disabled.")))
-
- (defun vt-numlock nil
- "Toggle VT application keypad on and off."
- (interactive)
- (if vt-applications-keypad-p (vt-keypad-off (interactive-p))
- (vt-keypad-on (interactive-p))))
-
- ;;; vt-control.el ends here
-