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| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Mon, 24 Dec 2012 03:08:33 +0900 |
| parents | 308d34e9f07d |
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| rev | line source |
|---|---|
| 0 | 1 ;;; vt-control.el --- Common VTxxx control functions |
| 2 | |
| 3 ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Author: Rob Riepel <riepel@networking.stanford.edu> | |
| 6 ;; Maintainer: Rob Riepel <riepel@networking.stanford.edu> | |
| 7 ;; Keywords: terminals | |
| 8 | |
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9 ;; This file is part of XEmacs. |
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11 ;; XEmacs is free software: you can redistribute it and/or modify it |
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12 ;; under the terms of the GNU General Public License as published by the |
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13 ;; Free Software Foundation, either version 3 of the License, or (at your |
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14 ;; option) any later version. |
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16 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT |
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17 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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18 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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19 ;; for more details. |
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| 21 ;; You should have received a copy of the GNU General Public License | |
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22 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>. |
| 0 | 23 |
| 24 ;;; Commentary: | |
| 25 | |
| 26 ;; The functions contained in this file send various VT control codes | |
| 27 ;; to the terminal where emacs is running. The following functions are | |
| 28 ;; available. | |
| 29 | |
| 30 ;; Function Action | |
| 31 | |
| 32 ;; vt-wide set wide screen (132 characters) | |
| 33 ;; vt-narrow set narrow screen (80 characters) | |
| 34 ;; vt-toggle-screen toggle wide/narrow screen | |
| 35 ;; vt-keypad-on set applications keypad on | |
| 36 ;; vt-keypad-off set applications keypad off | |
| 37 ;; vt-numlock toggle applications keypad on/off | |
| 38 | |
| 39 ;;; Usage: | |
| 40 | |
| 41 ;; To use enable these functions, simply load this file. | |
| 42 | |
| 43 ;; Note: vt-control makes no effort to determine how the terminal is | |
| 44 ;; initially set. It assumes the terminal starts with a width | |
| 45 ;; of 80 characters and the applications keypad enabled. Nor | |
| 46 ;; does vt-control try to restore the terminal when emacs is | |
| 47 ;; killed or suspended. | |
| 48 | |
| 49 ;;; Code: | |
| 50 | |
| 51 | |
| 52 ;;; Global variables | |
| 53 | |
| 54 (defvar vt-applications-keypad-p t | |
| 55 "If non-nil, keypad is in applications mode.") | |
| 56 | |
| 57 (defvar vt-wide-p nil | |
| 58 "If non-nil, the screen is 132 characters wide.") | |
| 59 | |
| 60 | |
| 61 ;;; Screen width functions. | |
| 62 | |
| 63 (defun vt-wide nil | |
| 64 "Set the screen 132 characters wide." | |
| 65 (interactive) | |
| 66 (send-string-to-terminal "\e[?3h") | |
| 67 (set-frame-width (selected-frame) 132) | |
| 68 (setq vt-wide-p t)) | |
| 69 | |
| 70 (defun vt-narrow nil | |
| 71 "Set the screen 80 characters wide." | |
| 72 (interactive) | |
| 73 (send-string-to-terminal "\e[?3l") | |
| 74 (set-frame-width (selected-frame) 80) | |
| 75 (setq vt-wide-p nil)) | |
| 76 | |
| 77 (defun vt-toggle-screen nil | |
| 78 "Toggle between 80 and 132 character screen width." | |
| 79 (interactive) | |
| 80 (if vt-wide-p (vt-narrow) (vt-wide))) | |
| 81 | |
| 82 | |
| 83 ;;; Applications keypad functions. | |
| 84 | |
| 85 (defun vt-keypad-on (&optional tell) | |
| 86 "Turn on the VT applications keypad." | |
| 87 (interactive) | |
| 88 (send-string-to-terminal "\e[\e=") | |
| 89 (setq vt-applications-keypad-p t) | |
| 90 (if (or tell (interactive-p)) (message "Applications keypad enabled."))) | |
| 91 | |
| 92 (defun vt-keypad-off (&optional tell) | |
| 93 "Turn off the VT applications keypad." | |
| 94 (interactive "p") | |
| 95 (send-string-to-terminal "\e[\e>") | |
| 96 (setq vt-applications-keypad-p nil) | |
| 97 (if (or tell (interactive-p)) (message "Applications keypad disabled."))) | |
| 98 | |
| 99 (defun vt-numlock nil | |
| 100 "Toggle VT application keypad on and off." | |
| 101 (interactive) | |
| 102 (if vt-applications-keypad-p (vt-keypad-off (interactive-p)) | |
| 103 (vt-keypad-on (interactive-p)))) | |
| 104 | |
| 105 ;;; vt-control.el ends here |