HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 55535639 | 1 | ;;; vt100-led.el --- functions for LED control on VT-100 terminals & clones |
| 76d7458e | 2 | |
| 58142744 ER |
3 | ;; Copyright (C) 1988 Free Software Foundation, Inc. |
| 4 | ||
| e5167999 ER |
5 | ;; Author: Howard Gayle |
| 6 | ;; Maintainer: FSF | |
| 6251ee24 | 7 | ;; Keywords: hardware |
| e5167999 | 8 | |
| 3b4a6e27 JB |
9 | ;; This file is part of GNU Emacs. |
| 10 | ||
| 11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
| 12 | ;; it under the terms of the GNU General Public License as published by | |
| e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 3b4a6e27 JB |
14 | ;; any later version. |
| 15 | ||
| 16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
| 17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | ;; GNU General Public License for more details. | |
| 20 | ||
| 21 | ;; You should have received a copy of the GNU General Public License | |
| b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
| 23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 24 | ;; Boston, MA 02111-1307, USA. | |
| 3b4a6e27 | 25 | |
| 55535639 PJ |
26 | ;;; Commentary: |
| 27 | ||
| e5167999 | 28 | ;;; Code: |
| 3b4a6e27 JB |
29 | |
| 30 | (defvar led-state (make-vector 5 nil) | |
| 31 | "The internal state of the LEDs. Choices are nil, t, `flash. | |
| 32 | Element 0 is not used.") | |
| 33 | ||
| 34 | (defun led-flash (l) | |
| 35 | "Flash LED l." | |
| 36 | (aset led-state l 'flash) | |
| 37 | (led-update)) | |
| 38 | ||
| 39 | (defun led-off (&optional l) | |
| 40 | "Turn off vt100 led number L. With no argument, turn them all off." | |
| 41 | (interactive "P") | |
| 42 | (if l | |
| 43 | (aset led-state (prefix-numeric-value l) nil) | |
| 44 | (fillarray led-state nil)) | |
| 45 | (led-update)) | |
| 46 | ||
| 47 | (defun led-on (l) | |
| 48 | "Turn on LED l." | |
| 49 | (aset led-state l t) | |
| 50 | (led-update)) | |
| 51 | ||
| 52 | (defun led-update () | |
| 53 | "Update the terminal's LEDs to reflect the internal state." | |
| 54 | (let ((f "\e[?0") ; String to flash. | |
| 55 | (o "\e[0") ; String for steady on. | |
| 56 | (l 1)) ; Current LED number. | |
| 57 | (while (/= l 5) | |
| 58 | (let ((s (aref led-state l))) | |
| 59 | (cond | |
| 60 | ((eq s 'flash) | |
| 61 | (setq f (concat f ";" (int-to-string l)))) | |
| 62 | (s | |
| 63 | (setq o (concat o ";" (int-to-string l)))))) | |
| 64 | (setq l (1+ l))) | |
| 65 | (setq o (concat o "q" f "t")) | |
| 66 | (send-string-to-terminal o))) | |
| 67 | ||
| 68 | (provide 'vt100-led) | |
| 76d7458e | 69 | |
| 6b61353c | 70 | ;;; arch-tag: 346e6480-5e31-4234-aafe-257cea4a36d1 |
| 76d7458e | 71 | ;;; vt100-led.el ends here |