Mercurial > hg > xemacs-beta
comparison lisp/term/vt100-led.el @ 0:376386a54a3c r19-14
Import from CVS: tag r19-14
| author | cvs |
|---|---|
| date | Mon, 13 Aug 2007 08:45:50 +0200 |
| parents | |
| children | 0293115a14e9 308d34e9f07d |
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| -1:000000000000 | 0:376386a54a3c |
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| 1 ;;; vt100-led.el --- functions for LED control on VT-100 terminals & clones. | |
| 2 | |
| 3 ;; Copyright (C) 1988 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Author: Howard Gayle | |
| 6 ;; Maintainer: FSF | |
| 7 ;; Keywords: hardware | |
| 8 | |
| 9 ;; This file is part of XEmacs. | |
| 10 | |
| 11 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 12 ;; 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 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 19 ;; General Public License for more details. | |
| 20 | |
| 21 ;; You should have received a copy of the GNU General Public License | |
| 22 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
| 23 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 24 | |
| 25 ;;; Code: | |
| 26 | |
| 27 (defvar led-state (make-vector 5 nil) | |
| 28 "The internal state of the LEDs. Choices are nil, t, `flash. | |
| 29 Element 0 is not used.") | |
| 30 | |
| 31 (defun led-flash (l) | |
| 32 "Flash LED l." | |
| 33 (aset led-state l 'flash) | |
| 34 (led-update)) | |
| 35 | |
| 36 (defun led-off (&optional l) | |
| 37 "Turn off vt100 led number L. With no argument, turn them all off." | |
| 38 (interactive "P") | |
| 39 (if l | |
| 40 (aset led-state (prefix-numeric-value l) nil) | |
| 41 (fillarray led-state nil)) | |
| 42 (led-update)) | |
| 43 | |
| 44 (defun led-on (l) | |
| 45 "Turn on LED l." | |
| 46 (aset led-state l t) | |
| 47 (led-update)) | |
| 48 | |
| 49 (defun led-update () | |
| 50 "Update the terminal's LEDs to reflect the internal state." | |
| 51 (let ((f "\e[?0") ; String to flash. | |
| 52 (o "\e[0") ; String for steady on. | |
| 53 (l 1)) ; Current LED number. | |
| 54 (while (/= l 5) | |
| 55 (let ((s (aref led-state l))) | |
| 56 (cond | |
| 57 ((eq s 'flash) | |
| 58 (setq f (concat f ";" (int-to-string l)))) | |
| 59 (s | |
| 60 (setq o (concat o ";" (int-to-string l)))))) | |
| 61 (setq l (1+ l))) | |
| 62 (setq o (concat o "q" f "t")) | |
| 63 (send-string-to-terminal o))) | |
| 64 | |
| 65 (provide 'vt100-led) | |
| 66 | |
| 67 ;;; vt100-led.el ends here |