root/trunk/lisp/term/wyse50.el

;;; wyse50.el --- terminal support code for Wyse 50 -*- no-byte-compile: t -*-

;; Copyright (C) 1989, 1993, 1994, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.

;; Author: Daniel Pfeiffer <occitan@esperanto.org>,
;;      Jim Blandy <jimb@occs.cs.oberlin.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, 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
;; Rewritten for Emacs 19 by jimb,  January 1992
;; Cleaned up for new terminal package conventions by esr, March 1993
;; Should work well for Televideo TVI 925 although it's overkill.
;;
;; The Wyse50 is ergonomically wonderful, but its escape-sequence design sucks
;; rocks.  The left-arrow key emits a backspace (!) and the down-arrow a line
;; feed (!!).  Thus, you have to unbind some commonly-used Emacs keys to
;; enable the arrows.

;;; Code:

(defun terminal-init-wyse50 ()
  "Terminal initialization function for wyse50."
  (define-key function-key-map "\C-a" (make-keymap))
  (mapcar (function (lambda (key-definition)
                      (define-key function-key-map
                        (car key-definition) (nth 1 key-definition))))
          '(
            ;; These might be set up by termcap and terminfo
            ("\C-k"     [up])
            ("\C-j"     [down])
            ("\C-l"     [right])
            ("\C-h"     [left])
            ("\^a@\^m"  [f1])
            ("\^aA\^m"  [f2])
            ("\^aB\^m"  [f3])
            ("\^aC\^m"  [f4])
            ("\^aD\^m"  [f5])
            ("\^aE\^m"  [f6])
            ("\^aF\^m"  [f7])
            ("\^aG\^m"  [f8])
            ("\^aH\^m"  [f9])

            ;; These might be set up by terminfo
            ("\eK"      [next])
            ("\eT"      [clearline])
            ("\^^"      [home])
            ("\e\^^"    [end])
            ("\eQ"      [insert])
            ("\eE"      [insertline])
            ("\eR"      [deleteline])
            ("\eP"      [print])
            ("\er"      [replace])
            ("\^aI\^m"  [f10])
            ("\^aJ\^m"  [f11])
            ("\^aK\^m"  [f12])
            ("\^aL\^m"  [f13])
            ("\^aM\^m"  [f14])
            ("\^aN\^m"  [f15])
            ("\^aO\^m"  [f16])
            ("\^a`\^m"  [f17])
            ("\^aa\^m"  [f18])
            ("\^ab\^m"  [f19])
            ("\^ac\^m"  [f20])
            ("\^ad\^m"  [f21])
            ("\^ae\^m"  [f22])
            ("\^af\^m"  [f23])
            ("\^ag\^m"  [f24])
            ("\^ah\^m"  [f25])
            ("\^ai\^m"  [f26])
            ("\^aj\^m"  [f27])
            ("\^ak\^m"  [f28])
            ("\^al\^m"  [f29])
            ("\^am\^m"  [f30])
            ("\^an\^m"  [f31])
            ("\^ao\^m"  [f32])

            ;; Terminfo may know about these, but X won't
            ("\eI"      [key-stab])             ;; Not an X keysym
            ("\eJ"      [key-snext])            ;; Not an X keysym
            ("\eY"      [key-clear])            ;; Not an X keysym

            ;; These are totally strange :-)
            ("\eW"      [?\C-?])            ;; Not an X keysym
            ("\^a\^k\^m"        [funct-up]) ;; Not an X keysym
            ("\^a\^j\^m"        [funct-down])  ;; Not an X keysym
            ("\^a\^l\^m"        [funct-right]) ;; Not an X keysym
            ("\^a\^h\^m"        [funct-left])  ;; Not an X keysym
            ("\^a\^m\^m"        [funct-return]) ;; Not an X keysym
            ("\^a\^i\^m"        [funct-tab])    ;; Not an X keysym
            ))

  ;; Miscellaneous hacks

  ;; This is an ugly hack for a nasty problem:
  ;; Wyse 50 takes one character cell to store video attributes (which seems to
  ;; explain width 79 rather than 80, column 1 is not used!!!).
  ;; On killing (C-x C-c) the end inverse code (on column 1 of line 24)
  ;; of the mode line is overwritten AFTER all the y-or-n questions.
  ;; This causes the attribute to remain in effect until the mode line has
  ;; scrolled of the screen.  Suspending (C-z) does not cause this problem.
  ;; On such terminals, Emacs should sacrifice the first and last character of
  ;; each mode line, rather than a whole screen column!
  (add-hook 'kill-emacs-hook
            (function (lambda () (interactive)
                        (send-string-to-terminal
                         (concat "\ea23R" (1+ (frame-width)) "C\eG0"))))))

(defun enable-arrow-keys ()
  "To be called by term-setup-hook. Overrides 6 Emacs standard keys
whose functions are then typed as follows:
C-a     Funct Left-arrow
C-h     M-?
LFD     Funct Return, some modes override down-arrow via LFD
C-k     CLR Line
C-l     Scrn CLR
M-r     M-x move-to-window-line, Funct up-arrow or down-arrow are similar
"
  (interactive)
  (mapcar (function (lambda (key-definition)
                      (global-set-key (car key-definition)
                                      (nth 1 key-definition))))
          ;; By unsetting C-a and then binding it to a prefix, we
          ;; allow the rest of the function keys which start with C-a
          ;; to be recognized.
          '(("\C-a"     nil)
            ("\C-k"     nil)
            ("\C-j"     nil)
            ("\C-l"     nil)
            ("\C-h"     nil)
            ("\er"      nil)))
  (fset 'enable-arrow-keys nil))

;;; arch-tag: b6a05d37-eead-4cf6-b997-0f956c68881c
;;; wyse50.el ends here