lisp/term/wyse50.el

   1 ;;; wyse50.el --- terminal support code for Wyse 50
   2
   3 ;; Copyright (C) 1989, 1993-1994, 2001-2017 Free Software Foundation,
   4 ;; Inc.
   5
   6 ;; Author: Daniel Pfeiffer <occitan@esperanto.org>,
   7 ;;      Jim Blandy <jimb@occs.cs.oberlin.edu>
   8 ;; Keywords: terminals
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; Rewritten for Emacs 19 by jimb,  January 1992
  28 ;; Cleaned up for new terminal package conventions by esr, March 1993
  29 ;; Should work well for Televideo TVI 925 although it's overkill.
  30 ;;
  31 ;; The Wyse50 is ergonomically wonderful, but its escape-sequence design sucks
  32 ;; rocks.  The left-arrow key emits a backspace (!) and the down-arrow a line
  33 ;; feed (!!).  Thus, you have to unbind some commonly-used Emacs keys to
  34 ;; enable the arrows.
  35
  36 ;;; Code:
  37
  38 (defvar wyse50-terminal-map
  39   (let ((map (make-sparse-keymap)))
  40     (dolist (key-definition
  41              '( ;; These might be set up by termcap and terminfo
  42                ("\C-k"  [up])
  43                ("\C-j"  [down])
  44                ("\C-l"  [right])
  45                ("\C-h"  [left])
  46                ("\^a@\^m"       [f1])
  47                ("\^aA\^m"       [f2])
  48                ("\^aB\^m"       [f3])
  49                ("\^aC\^m"       [f4])
  50                ("\^aD\^m"       [f5])
  51                ("\^aE\^m"       [f6])
  52                ("\^aF\^m"       [f7])
  53                ("\^aG\^m"       [f8])
  54                ("\^aH\^m"       [f9])
  55
  56                ;; These might be set up by terminfo
  57                ("\eK"   [next])
  58                ("\eT"   [clearline])
  59                ("\^^"   [home])
  60                ("\e\^^" [end])
  61                ("\eQ"   [insert])
  62                ("\eE"   [insertline])
  63                ("\eR"   [deleteline])
  64                ("\eP"   [print])
  65                ("\er"   [replace])
  66                ("\^aI\^m"       [f10])
  67                ("\^aJ\^m"       [f11])
  68                ("\^aK\^m"       [f12])
  69                ("\^aL\^m"       [f13])
  70                ("\^aM\^m"       [f14])
  71                ("\^aN\^m"       [f15])
  72                ("\^aO\^m"       [f16])
  73                ("\^a`\^m"       [f17])
  74                ("\^aa\^m"       [f18])
  75                ("\^ab\^m"       [f19])
  76                ("\^ac\^m"       [f20])
  77                ("\^ad\^m"       [f21])
  78                ("\^ae\^m"       [f22])
  79                ("\^af\^m"       [f23])
  80                ("\^ag\^m"       [f24])
  81                ("\^ah\^m"       [f25])
  82                ("\^ai\^m"       [f26])
  83                ("\^aj\^m"       [f27])
  84                ("\^ak\^m"       [f28])
  85                ("\^al\^m"       [f29])
  86                ("\^am\^m"       [f30])
  87                ("\^an\^m"       [f31])
  88                ("\^ao\^m"       [f32])
  89
  90                ;; Terminfo may know about these, but X won't
  91                ("\eI"   [key-stab])  ;; Not an X keysym
  92                ("\eJ"   [key-snext]) ;; Not an X keysym
  93                ("\eY"   [key-clear]) ;; Not an X keysym
  94
  95                ;; These are totally strange :-)
  96                ("\eW"   [?\C-?])                ;; Not an X keysym
  97                ("\^a\^k\^m"     [funct-up])     ;; Not an X keysym
  98                ("\^a\^j\^m"     [funct-down])   ;; Not an X keysym
  99                ("\^a\^l\^m"     [funct-right])  ;; Not an X keysym
 100                ("\^a\^h\^m"     [funct-left])   ;; Not an X keysym
 101                ("\^a\^m\^m"     [funct-return]) ;; Not an X keysym
 102                ("\^a\^i\^m"     [funct-tab])    ;; Not an X keysym
 103                ))
 104       (define-key map
 105         (car key-definition) (nth 1 key-definition)))
 106     map))
 107
 108 (defun terminal-init-wyse50 ()
 109   "Terminal initialization function for wyse50."
 110   ;; Use inheritance to let the main keymap override these defaults.
 111   ;; This way we don't override terminfo-derived settings or settings
 112   ;; made in the init file.
 113   (let ((m (copy-keymap wyse50-terminal-map)))
 114     (set-keymap-parent m (keymap-parent input-decode-map))
 115     (set-keymap-parent input-decode-map m))
 116
 117   ;; Miscellaneous hacks
 118
 119   ;; This is an ugly hack for a nasty problem:
 120   ;; Wyse 50 takes one character cell to store video attributes (which seems to
 121   ;; explain width 79 rather than 80, column 1 is not used!!!).
 122   ;; On killing (C-x C-c) the end inverse code (on column 1 of line 24)
 123   ;; of the mode line is overwritten AFTER all the y-or-n questions.
 124   ;; This causes the attribute to remain in effect until the mode line has
 125   ;; scrolled of the screen.  Suspending (C-z) does not cause this problem.
 126   ;; On such terminals, Emacs should sacrifice the first and last character of
 127   ;; each mode line, rather than a whole screen column!
 128   (add-hook 'kill-emacs-hook
 129             (function (lambda () (interactive)
 130                         (send-string-to-terminal
 131                          (concat "\ea23R" (1+ (frame-width)) "C\eG0"))))))
 132
 133 (defun enable-arrow-keys ()
 134   "To be called by `tty-setup-hook'.  Overrides 6 Emacs standard keys
 135 whose functions are then typed as follows:
 136 C-a     Funct Left-arrow
 137 C-h     M-?
 138 LFD     Funct Return, some modes override down-arrow via LFD
 139 C-k     CLR Line
 140 C-l     Scrn CLR
 141 M-r     M-x move-to-window-line, Funct up-arrow or down-arrow are similar"
 142   (interactive)
 143   ;; Not needed any more now that we use input-decode-map.
 144   ;; (dolist (key-definition
 145   ;;         ;; By unsetting C-a and then binding it to a prefix, we
 146   ;;         ;; allow the rest of the function keys which start with C-a
 147   ;;         ;; to be recognized.
 148   ;;         '(("\C-a"  nil)
 149   ;;           ("\C-k"  nil)
 150   ;;           ("\C-j"  nil)
 151   ;;           ("\C-l"  nil)
 152   ;;           ("\C-h"  nil)
 153   ;;           ("\er"   nil)))
 154   ;;   (global-set-key (car key-definition)
 155   ;;                   (nth 1 key-definition)))
 156   (fset 'enable-arrow-keys nil))
 157
 158 (provide 'term/wyse50)
 159
 160 ;;; wyse50.el ends here