Move vt-control and vt100-led to obsolete (bug#37562)

2 files changed, 175 insertions, 0 deletions

diff --git a/lisp/obsolete/vt-control.el b/lisp/obsolete/vt-control.el
new file mode 100644
index 00000000000..b80d3505b30
--- /dev/null
+++ b/lisp/obsolete/vt-control.el
@@ -0,0 +1,107 @@
+;;; vt-control.el --- Common VTxxx control functions  -*- lexical-binding:t -*-
+
+;; Copyright (C) 1993-1994, 2001-2022 Free Software Foundation, Inc.
+
+;; Author: Rob Riepel <riepel@networking.stanford.edu>
+;; Keywords: terminals
+
+;; 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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;  The functions contained in this file send various VT control codes
+;;  to the terminal where Emacs is running.  The following functions are
+;;  available.
+
+;;    Function           Action
+
+;;    vt-wide            set wide screen (132 characters)
+;;    vt-narrow          set narrow screen (80 characters)
+;;    vt-toggle-screen   toggle wide/narrow screen
+;;    vt-keypad-on       set applications keypad on
+;;    vt-keypad-off      set applications keypad off
+;;    vt-numlock         toggle applications keypad on/off
+
+;;; Usage:
+
+;;  To use enable these functions, simply load this file.
+
+;;  Note: vt-control makes no effort to determine how the terminal is
+;;        initially set.  It assumes the terminal starts with a width
+;;        of 80 characters and the applications keypad enabled.  Nor
+;;        does vt-control try to restore the terminal when emacs is
+;;        killed or suspended.
+
+;;; Code:
+
+
+;;;  Global variables
+
+(defvar vt-applications-keypad-p t
+  "If non-nil, keypad is in applications mode.")
+
+(defvar vt-wide-p nil
+  "If non-nil, the screen is 132 characters wide.")
+
+
+;;;  Screen width functions.
+
+(defun vt-wide nil
+  "Set the screen 132 characters wide."
+  (interactive)
+  (send-string-to-terminal "\e[?3h")
+  (set-frame-width (selected-frame) 132)
+  (setq vt-wide-p t))
+
+(defun vt-narrow nil
+  "Set the screen 80 characters wide."
+  (interactive)
+  (send-string-to-terminal "\e[?3l")
+  (set-frame-width (selected-frame) 80)
+  (setq vt-wide-p nil))
+
+(defun vt-toggle-screen nil
+  "Toggle between 80 and 132 character screen width."
+  (interactive)
+  (if vt-wide-p (vt-narrow) (vt-wide)))
+
+
+;;;  Applications keypad functions.
+
+(defun vt-keypad-on (&optional tell)
+  "Turn on the VT applications keypad."
+  (interactive "p")
+  (send-string-to-terminal "\e=")
+  (setq vt-applications-keypad-p t)
+  (if tell (message "Applications keypad enabled.")))
+
+(defun vt-keypad-off (&optional tell)
+  "Turn off the VT applications keypad."
+  (interactive "p")
+  (send-string-to-terminal "\e>")
+  (setq vt-applications-keypad-p nil)
+  (if tell (message "Applications keypad disabled.")))
+
+(defun vt-numlock (&optional tell)
+  "Toggle VT application keypad on and off."
+  (interactive "p")
+  (if vt-applications-keypad-p
+      (vt-keypad-off tell)
+    (vt-keypad-on tell)))
+
+(provide 'vt-control)
+
+;;; vt-control.el ends here
diff --git a/lisp/obsolete/vt100-led.el b/lisp/obsolete/vt100-led.el
new file mode 100644
index 00000000000..a6a256a6a74
--- /dev/null
+++ b/lisp/obsolete/vt100-led.el
@@ -0,0 +1,68 @@
+;;; vt100-led.el --- functions for LED control on VT-100 terminals & clones  -*- lexical-binding:t -*-
+
+;; Copyright (C) 1988, 2001-2022 Free Software Foundation, Inc.
+
+;; Author: Howard Gayle
+;; Maintainer: emacs-devel@gnu.org
+;; 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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; 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)
+
+;;; vt100-led.el ends here