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1 | ;;; vt-control.el --- Common VTxxx control functions |
2 | ||
ba318903 | 3 | ;; Copyright (C) 1993-1994, 2001-2014 Free Software Foundation, Inc. |
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4 | |
5 | ;; Author: Rob Riepel <riepel@networking.stanford.edu> | |
6 | ;; Maintainer: Rob Riepel <riepel@networking.stanford.edu> | |
b7f66977 | 7 | ;; Keywords: terminals |
522f9216 | 8 | |
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9 | ;; This file is part of GNU Emacs. |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
75993094 | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
75993094 | 15 | |
522f9216 | 16 | ;; GNU Emacs is distributed in the hope that it will be useful, |
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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 | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
522f9216 | 23 | |
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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 | ||
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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") | |
2cb48ea3 | 67 | (set-frame-width (selected-frame) 132) |
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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") | |
2cb48ea3 | 74 | (set-frame-width (selected-frame) 80) |
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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) | |
c96c7ed9 | 88 | (send-string-to-terminal "\e=") |
522f9216 | 89 | (setq vt-applications-keypad-p t) |
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90 | (if (or tell (called-interactively-p 'interactive)) |
91 | (message "Applications keypad enabled."))) | |
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92 | |
93 | (defun vt-keypad-off (&optional tell) | |
94 | "Turn off the VT applications keypad." | |
95 | (interactive "p") | |
c96c7ed9 | 96 | (send-string-to-terminal "\e>") |
522f9216 | 97 | (setq vt-applications-keypad-p nil) |
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98 | (if (or tell (called-interactively-p 'interactive)) |
99 | (message "Applications keypad disabled."))) | |
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100 | |
101 | (defun vt-numlock nil | |
102 | "Toggle VT application keypad on and off." | |
103 | (interactive) | |
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104 | (if vt-applications-keypad-p |
105 | (vt-keypad-off (called-interactively-p 'interactive)) | |
106 | (vt-keypad-on (called-interactively-p 'interactive)))) | |
522f9216 | 107 | |
896546cd RS |
108 | (provide 'vt-control) |
109 | ||
522f9216 | 110 | ;;; vt-control.el ends here |