;;; tvi970.el --- terminal support for the Televideo 970

;; Copyright (C) 1992, 2001, 2002, 2003, 2004, 2005,
;;   2006, 2007, 2008 Free Software Foundation, Inc.

;; Author: Jim Blandy <jimb@occs.cs.oberlin.edu>, January 1992
;; 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 <http://www.gnu.org/licenses/>.

;;; Commentary:

;; Uses the Emacs 19 terminal initialization features --- won't work with 18.

;;; Code:

(defvar tvi970-terminal-map
  (let ((map (make-sparse-keymap)))

    ;; Miscellaneous keys
    (dolist (key-binding
             '(;; These are set up by termcap or terminfo
               ;; ("\eOP"	[kp-f1])
               ;; ("\eOQ"	[kp-f2])
               ;; ("\eOR"	[kp-f3])
               ;; ("\eOS"	[kp-f4])

               ;; These might bre set by terminfo.
               ("\e[H"	[home])
               ("\e[Z"	[backtab])
               ("\e[i"	[print])
               ("\e[@"	[insert])
               ("\e[L"	[insertline])
               ("\e[M"	[deleteline])
               ("\e[U"	[next]) ;; actually the `page' key

               ;; These won't be set up by either
               ("\eOm"	[kp-subtract])
               ("\eOl"	[kp-separator])
               ("\eOn"	[kp-decimal])
               ("\eOM"	[kp-enter])

               ;; These won't be set up by either either
               ("\e[K"	[key_eol])	;; Not an X keysym
               ("\e[J"	[key_eos])	;; Not an X keysym
               ("\e[2J"	[key_clear])	;; Not an X keysym
               ("\e[P"	[key_dc])	;; Not an X keysym
               ("\e[g"	[S-tab])	;; Not an X keysym
               ("\e[2N"	[clearentry])	;; Not an X keysym
               ("\e[2K"	[S-clearentry])	;; Not an X keysym
               ("\e[E"	[?\C-j])	;; Not an X keysym
               ("\e[g"	[S-backtab])	;; Not an X keysym
               ("\e[?1i"	[key_sprint]) ;; Not an X keysym
               ("\e[4h"	[key_sic])            ;; Not an X keysym
               ("\e[4l"	[S-delete])           ;; Not an X keysym
               ("\e[Q"	[S-insertline])       ;; Not an X keysym
               ("\e[1Q"	[key_sdl])            ;; Not an X keysym
               ("\e[19l"	[key_seol])   ;; Not an X keysym
               ("\e[19h"	[S-erasepage]) ;; Not an X keysym
               ("\e[V"	[S-page])              ;; Not an X keysym
               ("\eS"	[send])                ;; Not an X keysym
               ("\e5"	[S-send])              ;; Not an X keysym
               ))
      (define-key map (car key-binding) (nth 1 key-binding)))
             

    ;; The numeric keypad keys.
    (dotimes (i 10)
      (define-key map (format "\eO%c" (+ i ?p))
        (vector (intern (format "kp-%d" i)))))
    ;; The numbered function keys.
    (dotimes (i 16)
      (define-key map (format "\e?%c" (+ i ?a))
        (vector (intern (format "f%d" (1+ i)))))
      (define-key map (format "\e?%c" (+ i ?A))
        (vector (intern (format "S-f%d" (1+ i))))))
    map))

(defun terminal-init-tvi970 ()
  "Terminal initialization function for tvi970."
  ;; Use inheritance to let the main keymap override these defaults.
  ;; This way we don't override terminfo-derived settings or settings
  ;; made in the .emacs file.
  (let ((m (copy-keymap tvi970-terminal-map)))
    (set-keymap-parent m (keymap-parent input-decode-map))
    (set-keymap-parent input-decode-map m))
  (tvi970-set-keypad-mode 1))


;; Should keypad numbers send ordinary digits or distinct escape sequences?
(defun tvi970-set-keypad-mode (&optional arg)
  "Set the current mode of the TVI 970 numeric keypad.
In ``numeric keypad mode'', the number keys on the keypad act as
ordinary digits.  In ``alternate keypad mode'', the keys send distinct
escape sequences, meaning that they can have their own bindings,
independent of the normal number keys.
With no argument, toggle between the two possible modes.
With a positive argument, select alternate keypad mode.
With a negative argument, select numeric keypad mode."
  (interactive "P")
  (let ((newval (if (null arg)
                    (not (terminal-parameter nil 'tvi970-keypad-numeric))
                  (> (prefix-numeric-value arg) 0))))
    (set-terminal-parameter nil 'tvi970-keypad-numeric newval)
    (send-string-to-terminal (if newval "\e=" "\e>"))))

;; arch-tag: c1334cf0-1462-41c3-a963-c077d175f8f0
;;; tvi970.el ends here