emacs/lisp/term/wyse50.el

; Like all the other files in this dir, this one needs to be redone
; for the new way of handling function keys.

; Terminal mode for Wyse 50
; should work well for Televideo Tvi 925 though it's an overkill
; Author Daniel Pfeiffer <pfeiffer@cix.cict.fr> january 1991

(require 'keypad)

; at least some of these should be transferred to keypad.el
(keypad-default "A" '(lambda () (interactive)
		       ; actually insert an empty line
		       (beginning-of-line)
		       (open-line 1)))
(keypad-default "E" 'kill-line)
; (keypad-default "h" 'execute-extended-command)
(define-key function-keymap "h" 'execute-extended-command)  ; bad, bad !!
(keypad-default "H" 'shell-command)
(keypad-default "I" '(lambda () (interactive)
		       (insert ? ))) ; works even in overwrite-mode
(keypad-default "L" '(lambda () (interactive)
		       ; delete the whole line
		       (beginning-of-line)
		       (kill-line 1)))
(keypad-default "M" 'overwrite-mode)
(keypad-default "\^e" 'shell)			; F5
(keypad-default "\^f" 'dired)			; F6
(keypad-default "\^g" 'rnews)			; F7
(keypad-default "\^h" 'rmail)			; F8

(keypad-default "\^i" 'delete-other-windows)	; F9
(keypad-default "\^j" 'other-window)		; F10
(keypad-default "\^k" 'split-window-vertically)	; F11

(keypad-default "\^m" 'help-for-help)		; F13
(keypad-default "\^n" 'toggle-screen-width)	; F14
(keypad-default "\^o" 'set-function-key)	; F15


; Keys that don't conflict with Emacs defaults
; I write \M-x and \C-x for what the user types, \ex and \^x for key sequences
(setup-terminal-keymap global-map
      '(("\M-?" . ?\?)	; Esc ?
	("\eI" . ?T)	; Shift Tab
	("\eJ" . ?P)	; Shift Prev PAGE
	("\eK" . ?N)	; PAGE Next
	("\eY" . ?C)	; Shift Scrn CLR
	("\eT" . ?E)	; CLR Line
	("\^^" . ?h)	; Home
	("\M-\^^" . ?H)	; Esc Home
	("\eQ" . ?I)	; INS Char
	("\eE" . ?A)	; Shift Line INS
	("\eW" . ?D)	; DEL Char
	("\eR" . ?L)))	; Shift Line DEL

; Print -- put in some extra security
(global-set-key "\eP" '(lambda () (interactive)
			  (if (y-or-n-p
			       (concat "Print buffer "
				       (buffer-name) "? "))
			      (print-buffer))))


; 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!
(setq kill-emacs-hook '(lambda () (interactive)
			 (send-string-to-terminal
			  (concat "\ea23R" (1+ (screen-width)) "C\eG0"))))


; This function does more than its name which was copied from term/vt100.el
; Some more neutral name should be used thru-out term/*.el to simplify
; programming term-setup-hook
(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-a C-a
C-h	M-?
LFD	Funct Return, some modes override down-arrow via LFD
C-k	CLR Line
C-l	Shift Scrn CLR
M-r	M-x move-to-window-line, Funct up-arrow or down-arrow are similar
All special keys except Send, Shift Ins, Shift Home and shifted functions keys
are assigned some hopefully useful meaning."
  (interactive)

  ; Function keys
  (define-key global-map "\^a" (define-prefix-command 'Funct-prefix))

  ; Arrow keys
  (setup-terminal-keymap global-map
      '(("\C-a\C-a" . beginning-of-line)	; for auld lang syne
	("\^a\^m\^m" . newline-and-indent)

	("\^k" . ?u)	; up-arrow
	("\^j" . ?d)	; down-arrow
	("\^l" . ?r)	; right-arrow
	("\^h" . ?l)	; left-arrow

	; Terminal needs both Ins and Repl but Emacs knows how to toggle
	; with just one key. No need to override Ins which is "\eq".
	("\er" . ?M)		; Repl

	("\^a\^i\^m" . ?t)	; Funct Tab

	; Function keys F1 thru F16  (we don't define shifted function keys,
	; they send the same code with the middle character in lowercase.
	; eg. "Shift F2" is the same as "Funct a" which is more mnemonic but
	; keypad.el doesn't provide enough codes to accomodate all these)
	("\^a@\^m" . 1)		("\^aH\^m" . 9)
	("\^aA\^m" . 2)		("\^aI\^m" . 10)
	("\^aB\^m" . 3)		("\^aJ\^m" . 11)
	("\^aC\^m" . 4)		("\^aK\^m" . 12)
	("\^aD\^m" . 5)		("\^aL\^m" . 13)
	("\^aE\^m" . 6)		("\^aM\^m" . 14)
	("\^aF\^m" . 7)		("\^aN\^m" . 15)
	("\^aG\^m" . 8)		("\^aO\^m" . 16)

	; Funct Arrow keys
	("\^a\^k\^m" . (lambda (n) (interactive "p")
			    (move-to-window-line (1- n))))
	("\^a\^j\^m" . (lambda (n) (interactive "p")
			    (move-to-window-line (- n))))
	("\^a\^h\^m" . beginning-of-line)
	("\^a\^l\^m" . end-of-line)))

  ; forget self to put memory to some serious use
  (fmakunbound 'enable-arrow-keys))


(defun toggle-screen-width ()
  "Alternate between 80 and 132 columns."
  (interactive)
  (if (<= (screen-width) 80)
      (progn
	(send-string-to-terminal "\e`;")
	(set-screen-width 131))
    (send-string-to-terminal "\e`:")
    (set-screen-width 79)))

;-----------------------------------------------------------------------------
; this function is completely independent of wyse, it should be auto-loadable
; (presumably from keypad.el) for use in ~/emacs.  It should be the only thing
; users need to know about all this unintelligible "forwarding" gibberish.
; This paves the way for a save-function-keys (some day or sleepless night)
; that will edit calls like (set-function-key ?x 'do-whatever) in ~/.emacs.
(defun set-function-key (key &optional def)
  "Prompt for a function or other special key and assign it a meaning.
The key must have been \"forwarded\" to a character by term/*.el.

As a function takes two args CHAR and DEF, with DEF as in define-key.
If your terminals term/*.el forwards a physical key to CHAR (before or after
calling this function), then that key will mean DEF, else it is ignored.
CHAR is one of the following:
For numbered function keys
	0, 1, ..., 24  (or ?\\^@, ?\\^a, ..., ?\\^x which is the same)
For keypad keys in application mode
	?0, ?1, ..., ?9  --  keypad key labelled with that digit,
		but only if that key is not an arrow key (see ?u, ?d, ?r, ?l).
	?-  --  keypad key labelled `-'.
	?.  --  keypad key labelled `.'.
	?,  --  keypad key labelled `,'.
	?e  --  key labelled enter.
For keys labelled with some words or a symbol
	?a  --  clear all tabs key.
	?A  --  insert line key.
	?C  --  clear screen key.
	?c  --  erase key.
	?D  --  delete character key.
	?d  --  down-arrow.
	?E  --  clear to end of line key.
	?e  --  key labelled enter.
	?f  --  find key or search key.
	?F  --  scroll forward key.
	?H  --  home-down.
	?h  --  home-position key.
	?I  --  insert character key
		If there is just an \"insert\" key, it should be this.
	?k  --  delete key or remove key.
	?L  --  delete line key.
	?l  --  left-arrow.
	?M  --  exit insert mode key.
	?N  --  next page key.
	?p  --  portrait mode.
	?P  --  previous page key.
	?q  --  landscape mode.
	?r  --  right-arrow.
	?R  --  scroll reverse key.
	?S  --  clear to end of screen key.
	?s  --  select key.
	?t  --  clear tab this column key.
	?T  --  set tab this column key.
	?u  --  up-arrow.
	?x  --  do key.
	?\\?  --  help."
  (interactive "kHit key to redefine")
  (let ((map function-keymap))
    (if (integerp key)
	()
      ; reinvent lookup-key to get (map . char) instead of def of char in map
      (setq map (or (lookup-key global-map
				(substring key 0 (1- (length key))))
		    global-map)
	    key (string-to-char (substring key (1- (length key)))))
      (while (symbolp map)
	(setq map (symbol-function map)))
      (setq map (if (listp map)
		    (cdr (assq key (cdr map)))
		  (aref map key)))
      (if (and (consp map)
	       (integerp (cdr map)))
	  (setq key (cdr map)
		map (car map))	; function-keymap usually
        (error "Key is not a \"forwarded\" definition.")))
    (if def
        ()
      (setq def (read-command "command (default last keyboard macro): "))
      (if (string-equal (symbol-name def) "")
          (setq def last-kbd-macro))
      (setq command-history	; nonsense really, since you don't see
	    (cons		; key as in a function call (?char)
	     (list 'set-function-key key
		   (if (stringp def) def (list 'quote def)))
	     command-history)))
    ; all we do when called as a function
    (define-key map (char-to-string key) def)))