[Emacs-diffs] Changes to emacs/lisp/vt100-led.el [lexbind]

[Miles Bader]

Index: emacs/lisp/vt100-led.el
diff -c /dev/null emacs/lisp/vt100-led.el:1.7.8.1
*** /dev/null   Tue Oct 14 19:52:38 2003
--- emacs/lisp/vt100-led.el     Tue Oct 14 19:51:28 2003
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*** 0 ****
--- 1,71 ----
+ ;;; vt100-led.el --- functions for LED control on VT-100 terminals & clones
+ 
+ ;; Copyright (C) 1988 Free Software Foundation, Inc.
+ 
+ ;; Author: Howard Gayle
+ ;; Maintainer: FSF
+ ;; Keywords: hardware
+ 
+ ;; 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:
+ 
+ ;;; Code:
+ 
+ (defvar led-state (make-vector 5 nil)
+    "The internal state of the LEDs.  Choices are nil, t, `flash.
+ Element 0 is not used.")
+ 
+ (defun led-flash (l)
+   "Flash LED l."
+   (aset led-state l 'flash)
+   (led-update))
+ 
+ (defun led-off (&optional l)
+   "Turn off vt100 led number L.  With no argument, turn them all off."
+   (interactive "P")
+   (if l
+       (aset led-state (prefix-numeric-value l) nil)
+     (fillarray led-state nil))
+   (led-update))
+ 
+ (defun led-on (l)
+   "Turn on LED l."
+   (aset led-state l t)
+   (led-update))
+ 
+ (defun led-update ()
+   "Update the terminal's LEDs to reflect the internal state."
+   (let ((f "\e[?0")                   ; String to flash.
+       (o "\e[0")                      ; String for steady on.
+       (l 1))                          ; Current LED number.
+     (while (/= l 5)
+       (let ((s (aref led-state l)))
+       (cond
+        ((eq s 'flash)
+         (setq f (concat f ";" (int-to-string l))))
+        (s
+         (setq o (concat o ";" (int-to-string l))))))
+       (setq l (1+ l)))
+     (setq o (concat o "q" f "t"))
+     (send-string-to-terminal o)))
+ 
+ (provide 'vt100-led)
+ 
+ ;;; arch-tag: 346e6480-5e31-4234-aafe-257cea4a36d1
+ ;;; vt100-led.el ends here