;;; vt100.el --- define VT100 function key sequences in function-key-map
-;; Copyright (C) 1989, 1993, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+;; Copyright (C) 1989, 1993, 2001-2014 Free Software Foundation, Inc.
;; Author: FSF
;; Keywords: terminals
;;; Commentary:
-;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
-
;; Handles all VT100 clones, including the Apollo terminal. Also handles
;; the VT200 --- its PF- and arrow- keys are different, but all those
;; are really set up by the terminal initialization code, which mines them
(tty-run-terminal-initialization (selected-frame) "lk201"))
;;; Controlling the screen width.
-(defvar vt100-wide-mode (= (frame-width) 132)
- "t if vt100 is in 132-column mode.")
-
-(defun vt100-wide-mode (&optional arg)
+(define-minor-mode vt100-wide-mode
"Toggle 132/80 column mode for vt100s.
-With positive argument, switch to 132-column mode.
-With negative argument, switch to 80-column mode."
- (interactive "P")
- (setq vt100-wide-mode
- (if (null arg) (not vt100-wide-mode)
- (> (prefix-numeric-value arg) 0)))
- (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
- (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
-
-;; arch-tag: 9ff41f24-a7c9-4dee-9cf2-fbaa951eb840
+With a prefix argument ARG, switch to 132-column mode if ARG is
+positive, and 80-column mode otherwise. If called from Lisp,
+switch to 132-column mode if ARG is omitted or nil."
+ :global t :init-value (= (frame-width) 132)
+ :group 'terminals
+ (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
+ (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
+
;;; vt100.el ends here