[bpt/emacs.git] / lisp / international / encoded-kb.el

;;; encoded-kb.el --- Handler to input multibyte characters encoded somehow

;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
;; Licensed to the Free Software Foundation.

;; 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 2, 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

(defvar encoded-kbd-mode nil
  "Non-nil if in Encoded-kbd minor mode.")
(put 'encoded-kbd-mode 'permanent-local t)

(let ((slot (assq 'encoded-kbd-mode minor-mode-alist))
      (name " Encoded-kbd"))
  (if slot
      (setcar (cdr slot) name)
    (setq minor-mode-alist
	  (cons '(encoded-kbd-mode " Encoded-kbd") minor-mode-alist))))

(defconst encoded-kbd-mode-map (make-sparse-keymap)
  "Keymap for Encoded-kbd minor mode.")

(let ((slot (assq 'encoded-kbd-mode minor-mode-map-alist)))
  (if slot
      (setcdr slot encoded-kbd-mode-map)
    (setq minor-mode-map-alist
	  (cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
		minor-mode-map-alist))))

;; Subsidiary keymaps for handling ISO2022 escape sequences.

(defvar encoded-kbd-iso2022-esc-map
  (let ((map (make-sparse-keymap)))
    (define-key map "$" 'encoded-kbd-iso2022-esc-dollar-prefix)
    (define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
    (define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
    (define-key map "," 'encoded-kbd-iso2022-designation-prefix)
    (define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
    map)
  "Keymap for handling ESC code in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)

(defvar encoded-kbd-iso2022-esc-dollar-map
  (let ((map (make-sparse-keymap)))
    (define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
    (define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
    (define-key map "," 'encoded-kbd-iso2022-designation-prefix)
    (define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
    (define-key map "@" 'encoded-kbd-iso2022-designation)
    (define-key map "A" 'encoded-kbd-iso2022-designation)
    (define-key map "B" 'encoded-kbd-iso2022-designation)
    map)
  "Keymap for handling ESC $ sequence in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-esc-dollar-prefix
      encoded-kbd-iso2022-esc-dollar-map)

(defvar encoded-kbd-iso2022-designation-map
  (let ((map (make-sparse-keymap))
	(l charset-list)
	final-char)
    (while l
      (setq final-char (charset-iso-final-char (car l)))
      (if (> final-char 0)
	  (define-key map (char-to-string final-char)
	    'encoded-kbd-iso2022-designation))
      (setq l (cdr l)))
    map)
  "Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-designation-prefix
      encoded-kbd-iso2022-designation-map)

(defvar encoded-kbd-iso2022-non-ascii-map
  (let ((map (make-keymap))
	(i 32))
    (while (< i 128)
      (define-key map (char-to-string i) 'encoded-kbd-self-insert-iso2022-7bit)
      (setq i (1+ i)))
    (define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
    (setq i 160)
    (while (< i 256)
      (define-key map (vector i) 'encoded-kbd-handle-8bit)
      (setq i (1+ i)))
    map)
  "Keymap for handling non-ASCII character set in Encoded-kbd mode.")

;; One of the symbols `sjis', `iso2022-7', `iso2022-8', or `big5' to
;; denote what kind of coding-system we are now handling in
;; Encoded-kbd mode.
(defvar encoded-kbd-coding nil)

;; Keep information of designation state of ISO2022 encoding.  When
;; Encoded-kbd mode is on, this is set to a vector of length 4, the
;; elements are character sets currently designated to graphic
;; registers 0 thru 3.

(defvar encoded-kbd-iso2022-designations nil)
(put 'encoded-kbd-iso2022-designations 'permanent-local t)

;; Keep information of invocation state of ISO2022 encoding.  When
;; Encoded-kbd mode is on, this is set to a vector of length 3,
;; graphic register numbers currently invoked to graphic plane 1 and
;; 2, and a single shifted graphic register number.

(defvar encoded-kbd-iso2022-invocations nil)
(put 'encoded-kbd-iso2022-invocations 'permanent-local t)

(defun encoded-kbd-iso2022-designation ()
  "Do ISO2022 designation according to the current key in Encoded-kbd mode.
The following key sequence may cause multilingual text insertion."
  (interactive)
  (let ((key-seq (this-command-keys))
	(prev-g0-charset (aref encoded-kbd-iso2022-designations
			       (aref encoded-kbd-iso2022-invocations 0)))
	intermediate-char final-char
	reg dimension chars charset)
    (if (= (length key-seq) 4)
	;; ESC $ <intermediate-char> <final-char>
	(setq intermediate-char (aref key-seq 2)
	      dimension 2
	      chars (if (< intermediate-char ?,) 94 96)
	      final-char (aref key-seq 3)
	      reg (mod intermediate-char 4))
      (if (= (aref key-seq 1) ?$)
	  ;; ESC $ <final-char>
	  (setq dimension 2
		chars 94
		final-char (aref key-seq 2)
		reg 0)
	;; ESC <intermediate-char> <final-char>
	(setq intermediate-char (aref key-seq 1)
	      dimension 1
	      chars (if (< intermediate-char ?,) 94 96)
	      final-char (aref key-seq 2)
	      reg (mod intermediate-char 4))))
    (if (setq charset (iso-charset dimension chars final-char))
	(aset encoded-kbd-iso2022-designations reg charset)
      (error "Character set of DIMENSION %s, CHARS %s, FINAL-CHAR `%c' is not supported"
	     dimension chars final-char))

    (if (memq (aref encoded-kbd-iso2022-designations
		    (aref encoded-kbd-iso2022-invocations 0))
	      '(ascii latin-jisx0201))
	;; Graphic plane 0 (0x20..0x7f) is for ASCII.  We don't have
	;; to handle characters in this range specially.
	(if (not (memq prev-g0-charset '(ascii latin-jisx0201)))
	    ;; We must exit recursive edit now.
	    (throw 'exit nil))
      ;; Graphic plane 0 is for non-ASCII.
      (if (memq prev-g0-charset '(ascii latin-jisx0201))
	  ;; We must handle keys specially.
	  (let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
	    (recursive-edit))))))

(defun encoded-kbd-handle-8bit ()
  "Handle an 8-bit character entered in Encoded-kbd mode."
  (interactive)
  (cond ((eq encoded-kbd-coding 'iso2022-7)
	 (error "Can't handle the character code %d" last-command-char))

	((eq encoded-kbd-coding 'iso2022-8)
	 (cond ((= last-command-char ?\216)
		(aset encoded-kbd-iso2022-invocations 2 2))

	       ((= last-command-char ?\217)
		(aset encoded-kbd-iso2022-invocations 2 3))

	       ((>= last-command-char ?\240)
		(encoded-kbd-self-insert-iso2022-8bit))

	       (t
		(error "Can't handle the character code %d"
		       last-command-char))))

	((eq encoded-kbd-coding 'sjis)
	 (encoded-kbd-self-insert-sjis))

	(t
	 (encoded-kbd-self-insert-big5))))

(defun encoded-kbd-self-insert-iso2022-7bit ()
  (interactive)
  (let* ((charset (aref encoded-kbd-iso2022-designations
			(or (aref encoded-kbd-iso2022-invocations 2)
			    (aref encoded-kbd-iso2022-invocations 0))))
	 (char (if (= (charset-dimension charset) 1)
		   (make-char charset last-command-char)
		 (make-char charset last-command-char (read-char-exclusive)))))
    (aset encoded-kbd-iso2022-invocations 2 nil)
    (setq unread-command-events (cons char unread-command-events))))

(defun encoded-kbd-self-insert-iso2022-8bit ()
  (interactive)
  (cond
   ((= last-command-char ?\216)		; SS2 (Single Shift 2)
    (aset encoded-kbd-iso2022-invocations 2 2))
   ((= last-command-char ?\217)		; SS3 (Single Shift 3)
    (aset encoded-kbd-iso2022-invocations 2 3))
   (t
  (let* ((charset (aref encoded-kbd-iso2022-designations
			(or (aref encoded-kbd-iso2022-invocations 2)
			    (aref encoded-kbd-iso2022-invocations 1))))
	 (char (if (= (charset-dimension charset) 1)
		   (make-char charset last-command-char)
		   (make-char charset last-command-char
			      (read-char-exclusive)))))
    (aset encoded-kbd-iso2022-invocations 2 nil)
      (setq unread-command-events (cons char unread-command-events))))))

(defun encoded-kbd-self-insert-sjis ()
  (interactive)
  (let ((char (if (or (< last-command-char ?\xA0) (>= last-command-char ?\xE0))
		  (decode-sjis-char (+ (ash last-command-char 8)
				       (read-char-exclusive)))
		(make-char 'katakana-jisx0201 last-command-char))))
    (setq unread-command-events (cons char unread-command-events))))

(defun encoded-kbd-self-insert-big5 ()
  (interactive)
  (let ((char (decode-big5-char (+ (ash last-command-char 8)
				   (read-char-exclusive)))))
    (setq unread-command-events (cons char unread-command-events))))

(defun encoded-kbd-self-insert-ccl ()
  (interactive)
  (let ((str (char-to-string last-command-char))
	(coding (keyboard-coding-system)))
    (setq str (decode-coding-string str coding))
    (setq unread-command-events
	  (append (string-to-list str) unread-command-events))))

(defun encoded-kbd-setup-keymap (coding)
  ;; At first, reset the keymap.
  (setcdr encoded-kbd-mode-map nil)
  ;; Then setup the keymap according to the keyboard coding system.
  (cond
   ((eq encoded-kbd-coding 'sjis)
    (let ((i 128))
      (while (< i 256)
	(define-key encoded-kbd-mode-map
	  (vector i) 'encoded-kbd-self-insert-sjis)
	(setq i (1+ i)))))

   ((eq encoded-kbd-coding 'big5)
    (let ((i 161))
      (while (< i 255)
	(define-key encoded-kbd-mode-map
	  (vector i) 'encoded-kbd-self-insert-big5)
	(setq i (1+ i)))))

   ((eq encoded-kbd-coding 'iso2022-7)
    (define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix))
    
   ((eq encoded-kbd-coding 'iso2022-8)
    (define-key encoded-kbd-mode-map
      (vector ?\216) 'encoded-kbd-self-insert-iso2022-8bit)
    (define-key encoded-kbd-mode-map
      (vector ?\217) 'encoded-kbd-self-insert-iso2022-8bit)
    (let ((i 160))
      (while (< i 256)
	(define-key encoded-kbd-mode-map
	  (vector i) 'encoded-kbd-self-insert-iso2022-8bit)
	(setq i (1+ i)))))

   ((eq encoded-kbd-coding 'ccl)
    (let ((valid-codes (or (coding-system-get coding 'valid-codes)
			   '((128 255))))
	  elt from to)
      (while valid-codes
	(setq elt (car valid-codes) valid-codes (cdr valid-codes))
	(if (consp elt)
	    (setq from (car elt) to (cdr elt))
	  (setq from (setq to elt)))
	(while (<= from to)
	  (if (>= from 128)
	      (define-key encoded-kbd-mode-map
		(vector from) 'encoded-kbd-self-insert-ccl))
	  (setq from (1+ from))))))

   (t
    (error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding))))


;; Input mode at the time Encoded-kbd mode is turned on is saved here.
(defvar saved-input-mode nil)

;;;###autoload
(defun encoded-kbd-mode (&optional arg)
  "Toggle Encoded-kbd minor mode.
With arg, turn Encoded-kbd mode on if and only if arg is positive.

You should not turn this mode on manually, instead use the command
\\[set-keyboard-coding-system] which turns on or off this mode
automatically.

In Encoded-kbd mode, a text sent from keyboard is accepted
as a multilingual text encoded in a coding system set by
\\[set-keyboard-coding-system]."
  (if encoded-kbd-mode
      ;; We must at first reset input-mode to the original.
      (apply 'set-input-mode saved-input-mode))
  (setq encoded-kbd-mode
	(if (null arg) (null encoded-kbd-mode)
	  (> (prefix-numeric-value arg) 0)))
  (if encoded-kbd-mode
      (let ((coding (keyboard-coding-system)))
	(setq saved-input-mode  (current-input-mode))
	(cond ((null coding)
	       (setq encoded-kbd-mode nil) 
	       (error "No coding system for keyboard input is set"))

	      ((= (coding-system-type coding) 1) ; SJIS
	       (set-input-mode
		(nth 0 saved-input-mode) (nth 1 saved-input-mode)
		'use-8th-bit (nth 3 saved-input-mode))	
	       (setq encoded-kbd-coding 'sjis))

	      ((= (coding-system-type coding) 2) ; ISO2022
	       (if (aref (coding-system-flags coding) 7) ; 7-bit only
		   (setq encoded-kbd-coding 'iso2022-7)
		 (set-input-mode
		  (nth 0 saved-input-mode) (nth 1 saved-input-mode)
		  'use-8th-bit (nth 3 saved-input-mode))	
		 (setq encoded-kbd-coding 'iso2022-8))
	       (setq encoded-kbd-iso2022-designations (make-vector 4 nil))
	       (let ((flags (coding-system-flags coding))
		     (i 0))
		 (while (< i 4)
		   (if (charsetp (aref flags i))
		       (aset encoded-kbd-iso2022-designations i
			     (aref flags i))
		     (if (charsetp (car-safe (aref flags i)))
		       (aset encoded-kbd-iso2022-designations i
			     (car (aref flags i)))))
		   (setq i (1+ i))))
	       (setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
	       (aset encoded-kbd-iso2022-invocations 0 0)
	       (aset encoded-kbd-iso2022-invocations 1 1))

	      ((= (coding-system-type coding) 3) ; BIG5
	       (set-input-mode
		(nth 0 saved-input-mode) (nth 1 saved-input-mode)
		'use-8th-bit (nth 3 saved-input-mode))	
	       (setq encoded-kbd-coding 'big5))

	      ((= (coding-system-type coding) 4) ; CCL based coding
	       (set-input-mode
		(nth 0 saved-input-mode) (nth 1 saved-input-mode)
		'use-8th-bit (nth 3 saved-input-mode))	
	       (setq encoded-kbd-coding 'ccl))

	      (t
	       (setq encoded-kbd-mode nil)
	       (error "Coding-system `%s' is not supported in Encoded-kbd mode"
		      (keyboard-coding-system))))
	(encoded-kbd-setup-keymap coding)
	(run-hooks 'encoded-kbd-mode-hook))))

;;; encoded-kb.el ends here
Commit	Line	Data
3fdc9c8f	1	;;; encoded-kb.el --- Handler to input multibyte characters encoded somehow
4ed46869	2
4ed46869	3	;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
fa526c4a	4	;; Licensed to the Free Software Foundation.
4ed46869 KH	5
	6	;; This file is part of GNU Emacs.
	7
	8	;; GNU Emacs is free software; you can redistribute it and/or modify
	9	;; it under the terms of the GNU General Public License as published by
	10	;; the Free Software Foundation; either version 2, or (at your option)
	11	;; any later version.
	12
	13	;; GNU Emacs is distributed in the hope that it will be useful,
	14	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	;; GNU General Public License for more details.
	17
	18	;; You should have received a copy of the GNU General Public License
369314dc KH	19	;; along with GNU Emacs; see the file COPYING. If not, write to the
	20	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	21	;; Boston, MA 02111-1307, USA.
4ed46869 KH	22
	23	(defvar encoded-kbd-mode nil
	24	"Non-nil if in Encoded-kbd minor mode.")
	25	(put 'encoded-kbd-mode 'permanent-local t)
	26
068b074e KH	27	(let ((slot (assq 'encoded-kbd-mode minor-mode-alist))
	28	(name " Encoded-kbd"))
	29	(if slot
	30	(setcar (cdr slot) name)
4ed46869	31	(setq minor-mode-alist
068b074e	32	(cons '(encoded-kbd-mode " Encoded-kbd") minor-mode-alist))))
4ed46869	33
068b074e	34	(defconst encoded-kbd-mode-map (make-sparse-keymap)
4ed46869 KH	35	"Keymap for Encoded-kbd minor mode.")
4ed46869 KH	36
068b074e KH	37	(let ((slot (assq 'encoded-kbd-mode minor-mode-map-alist)))
	38	(if slot
	39	(setcdr slot encoded-kbd-mode-map)
4ed46869 KH	40	(setq minor-mode-map-alist
4ed46869 KH	41	(cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
068b074e	42	minor-mode-map-alist))))
4ed46869 KH	43
	44	;; Subsidiary keymaps for handling ISO2022 escape sequences.
	45
	46	(defvar encoded-kbd-iso2022-esc-map
	47	(let ((map (make-sparse-keymap)))
	48	(define-key map "$" 'encoded-kbd-iso2022-esc-dollar-prefix)
	49	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	50	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	51	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	52	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
4ed46869 KH	53	map)
4ed46869 KH	54	"Keymap for handling ESC code in Encoded-kbd mode.")
f61d15a7	55	(fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)
4ed46869 KH	56
	57	(defvar encoded-kbd-iso2022-esc-dollar-map
	58	(let ((map (make-sparse-keymap)))
	59	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	60	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	61	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	62	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
	63	(define-key map "@" 'encoded-kbd-iso2022-designation)
	64	(define-key map "A" 'encoded-kbd-iso2022-designation)
	65	(define-key map "B" 'encoded-kbd-iso2022-designation)
4ed46869	66	map)
f61d15a7	67	"Keymap for handling ESC $ sequence in Encoded-kbd mode.")
4ed46869 KH	68	(fset 'encoded-kbd-iso2022-esc-dollar-prefix
	69	encoded-kbd-iso2022-esc-dollar-map)
	70
	71	(defvar encoded-kbd-iso2022-designation-map
	72	(let ((map (make-sparse-keymap))
164edac8 KH	73	(l charset-list)
164edac8 KH	74	final-char)
f61d15a7	75	(while l
164edac8	76	(setq final-char (charset-iso-final-char (car l)))
71b898fe	77	(if (> final-char 0)
164edac8 KH	78	(define-key map (char-to-string final-char)
164edac8 KH	79	'encoded-kbd-iso2022-designation))
f61d15a7	80	(setq l (cdr l)))
4ed46869 KH	81	map)
	82	"Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
	83	(fset 'encoded-kbd-iso2022-designation-prefix
	84	encoded-kbd-iso2022-designation-map)
	85
	86	(defvar encoded-kbd-iso2022-non-ascii-map
	87	(let ((map (make-keymap))
	88	(i 32))
	89	(while (< i 128)
	90	(define-key map (char-to-string i) 'encoded-kbd-self-insert-iso2022-7bit)
	91	(setq i (1+ i)))
f61d15a7	92	(define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
a0d4676a KH	93	(setq i 160)
	94	(while (< i 256)
	95	(define-key map (vector i) 'encoded-kbd-handle-8bit)
	96	(setq i (1+ i)))
4ed46869 KH	97	map)
	98	"Keymap for handling non-ASCII character set in Encoded-kbd mode.")
	99
	100	;; One of the symbols `sjis', `iso2022-7', `iso2022-8', or `big5' to
	101	;; denote what kind of coding-system we are now handling in
	102	;; Encoded-kbd mode.
	103	(defvar encoded-kbd-coding nil)
	104
068b074e KH	105	;; Keep information of designation state of ISO2022 encoding. When
	106	;; Encoded-kbd mode is on, this is set to a vector of length 4, the
	107	;; elements are character sets currently designated to graphic
	108	;; registers 0 thru 3.
4ed46869 KH	109
4ed46869 KH	110	(defvar encoded-kbd-iso2022-designations nil)
4ed46869 KH	111	(put 'encoded-kbd-iso2022-designations 'permanent-local t)
4ed46869 KH	112
068b074e KH	113	;; Keep information of invocation state of ISO2022 encoding. When
	114	;; Encoded-kbd mode is on, this is set to a vector of length 3,
	115	;; graphic register numbers currently invoked to graphic plane 1 and
	116	;; 2, and a single shifted graphic register number.
4ed46869 KH	117
4ed46869 KH	118	(defvar encoded-kbd-iso2022-invocations nil)
4ed46869 KH	119	(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
	120
	121	(defun encoded-kbd-iso2022-designation ()
e8dd0160	122	"Do ISO2022 designation according to the current key in Encoded-kbd mode.
4ed46869 KH	123	The following key sequence may cause multilingual text insertion."
	124	(interactive)
	125	(let ((key-seq (this-command-keys))
a0d4676a KH	126	(prev-g0-charset (aref encoded-kbd-iso2022-designations
a0d4676a KH	127	(aref encoded-kbd-iso2022-invocations 0)))
4ed46869 KH	128	intermediate-char final-char
4ed46869 KH	129	reg dimension chars charset)
f61d15a7 KH	130	(if (= (length key-seq) 4)
	131	;; ESC $ <intermediate-char> <final-char>
	132	(setq intermediate-char (aref key-seq 2)
4ed46869 KH	133	dimension 2
4ed46869 KH	134	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	135	final-char (aref key-seq 3)
4ed46869 KH	136	reg (mod intermediate-char 4))
4ed46869 KH	137	(if (= (aref key-seq 1) ?$)
f61d15a7	138	;; ESC $ <final-char>
4ed46869 KH	139	(setq dimension 2
4ed46869 KH	140	chars 94
f61d15a7	141	final-char (aref key-seq 2)
4ed46869	142	reg 0)
f61d15a7 KH	143	;; ESC <intermediate-char> <final-char>
f61d15a7 KH	144	(setq intermediate-char (aref key-seq 1)
4ed46869 KH	145	dimension 1
4ed46869 KH	146	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	147	final-char (aref key-seq 2)
4ed46869 KH	148	reg (mod intermediate-char 4))))
	149	(if (setq charset (iso-charset dimension chars final-char))
	150	(aset encoded-kbd-iso2022-designations reg charset)
	151	(error "Character set of DIMENSION %s, CHARS %s, FINAL-CHAR `%c' is not supported"
	152	dimension chars final-char))
	153
f61d15a7	154	(if (memq (aref encoded-kbd-iso2022-designations
a0d4676a	155	(aref encoded-kbd-iso2022-invocations 0))
f61d15a7	156	'(ascii latin-jisx0201))
4ed46869 KH	157	;; Graphic plane 0 (0x20..0x7f) is for ASCII. We don't have
4ed46869 KH	158	;; to handle characters in this range specially.
a0d4676a	159	(if (not (memq prev-g0-charset '(ascii latin-jisx0201)))
e8dd0160	160	;; We must exit recursive edit now.
a0d4676a	161	(throw 'exit nil))
4ed46869	162	;; Graphic plane 0 is for non-ASCII.
a0d4676a	163	(if (memq prev-g0-charset '(ascii latin-jisx0201))
e8dd0160	164	;; We must handle keys specially.
a0d4676a KH	165	(let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
a0d4676a KH	166	(recursive-edit))))))
4ed46869 KH	167
4ed46869 KH	168	(defun encoded-kbd-handle-8bit ()
e8dd0160	169	"Handle an 8-bit character entered in Encoded-kbd mode."
4ed46869 KH	170	(interactive)
	171	(cond ((eq encoded-kbd-coding 'iso2022-7)
	172	(error "Can't handle the character code %d" last-command-char))
	173
	174	((eq encoded-kbd-coding 'iso2022-8)
	175	(cond ((= last-command-char ?\216)
	176	(aset encoded-kbd-iso2022-invocations 2 2))
	177
	178	((= last-command-char ?\217)
	179	(aset encoded-kbd-iso2022-invocations 2 3))
	180
75c44f31	181	((>= last-command-char ?\240)
4ed46869 KH	182	(encoded-kbd-self-insert-iso2022-8bit))
	183
	184	(t
	185	(error "Can't handle the character code %d"
	186	last-command-char))))
	187
	188	((eq encoded-kbd-coding 'sjis)
	189	(encoded-kbd-self-insert-sjis))
	190
	191	(t
	192	(encoded-kbd-self-insert-big5))))
	193
	194	(defun encoded-kbd-self-insert-iso2022-7bit ()
	195	(interactive)
	196	(let* ((charset (aref encoded-kbd-iso2022-designations
	197	(or (aref encoded-kbd-iso2022-invocations 2)
	198	(aref encoded-kbd-iso2022-invocations 0))))
946fdacf KH	199	(char (if (= (charset-dimension charset) 1)
	200	(make-char charset last-command-char)
	201	(make-char charset last-command-char (read-char-exclusive)))))
4ed46869	202	(aset encoded-kbd-iso2022-invocations 2 nil)
946fdacf	203	(setq unread-command-events (cons char unread-command-events))))
4ed46869 KH	204
	205	(defun encoded-kbd-self-insert-iso2022-8bit ()
	206	(interactive)
068b074e KH	207	(cond
	208	((= last-command-char ?\216) ; SS2 (Single Shift 2)
	209	(aset encoded-kbd-iso2022-invocations 2 2))
	210	((= last-command-char ?\217) ; SS3 (Single Shift 3)
	211	(aset encoded-kbd-iso2022-invocations 2 3))
	212	(t
4ed46869 KH	213	(let* ((charset (aref encoded-kbd-iso2022-designations
	214	(or (aref encoded-kbd-iso2022-invocations 2)
	215	(aref encoded-kbd-iso2022-invocations 1))))
946fdacf KH	216	(char (if (= (charset-dimension charset) 1)
946fdacf KH	217	(make-char charset last-command-char)
068b074e KH	218	(make-char charset last-command-char
068b074e KH	219	(read-char-exclusive)))))
4ed46869	220	(aset encoded-kbd-iso2022-invocations 2 nil)
068b074e	221	(setq unread-command-events (cons char unread-command-events))))))
4ed46869 KH	222
	223	(defun encoded-kbd-self-insert-sjis ()
	224	(interactive)
946fdacf KH	225	(let ((char (if (or (< last-command-char ?\xA0) (>= last-command-char ?\xE0))
	226	(decode-sjis-char (+ (ash last-command-char 8)
	227	(read-char-exclusive)))
	228	(make-char 'katakana-jisx0201 last-command-char))))
	229	(setq unread-command-events (cons char unread-command-events))))
4ed46869 KH	230
	231	(defun encoded-kbd-self-insert-big5 ()
	232	(interactive)
946fdacf KH	233	(let ((char (decode-big5-char (+ (ash last-command-char 8)
	234	(read-char-exclusive)))))
	235	(setq unread-command-events (cons char unread-command-events))))
4ed46869	236
068b074e KH	237	(defun encoded-kbd-self-insert-ccl ()
	238	(interactive)
	239	(let ((str (char-to-string last-command-char))
	240	(coding (keyboard-coding-system)))
	241	(setq str (decode-coding-string str coding))
	242	(setq unread-command-events
	243	(append (string-to-list str) unread-command-events))))
	244
	245	(defun encoded-kbd-setup-keymap (coding)
	246	;; At first, reset the keymap.
	247	(setcdr encoded-kbd-mode-map nil)
	248	;; Then setup the keymap according to the keyboard coding system.
	249	(cond
	250	((eq encoded-kbd-coding 'sjis)
	251	(let ((i 128))
	252	(while (< i 256)
	253	(define-key encoded-kbd-mode-map
	254	(vector i) 'encoded-kbd-self-insert-sjis)
	255	(setq i (1+ i)))))
	256
	257	((eq encoded-kbd-coding 'big5)
	258	(let ((i 161))
	259	(while (< i 255)
	260	(define-key encoded-kbd-mode-map
	261	(vector i) 'encoded-kbd-self-insert-big5)
	262	(setq i (1+ i)))))
	263
	264	((eq encoded-kbd-coding 'iso2022-7)
	265	(define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix))
	266
	267	((eq encoded-kbd-coding 'iso2022-8)
	268	(define-key encoded-kbd-mode-map
	269	(vector ?\216) 'encoded-kbd-self-insert-iso2022-8bit)
	270	(define-key encoded-kbd-mode-map
	271	(vector ?\217) 'encoded-kbd-self-insert-iso2022-8bit)
	272	(let ((i 160))
	273	(while (< i 256)
	274	(define-key encoded-kbd-mode-map
	275	(vector i) 'encoded-kbd-self-insert-iso2022-8bit)
	276	(setq i (1+ i)))))
	277
	278	((eq encoded-kbd-coding 'ccl)
	279	(let ((valid-codes (or (coding-system-get coding 'valid-codes)
	280	'((128 255))))
	281	elt from to)
	282	(while valid-codes
	283	(setq elt (car valid-codes) valid-codes (cdr valid-codes))
	284	(if (consp elt)
	285	(setq from (car elt) to (cdr elt))
	286	(setq from (setq to elt)))
	287	(while (<= from to)
	288	(if (>= from 128)
	289	(define-key encoded-kbd-mode-map
	290	(vector from) 'encoded-kbd-self-insert-ccl))
	291	(setq from (1+ from))))))
	292
	293	(t
	294	(error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding))))
	295
	296
586ec68a KH	297	;; Input mode at the time Encoded-kbd mode is turned on is saved here.
	298	(defvar saved-input-mode nil)
	299
f61d15a7	300	;;;###autoload
4ed46869 KH	301	(defun encoded-kbd-mode (&optional arg)
4ed46869 KH	302	"Toggle Encoded-kbd minor mode.
586ec68a	303	With arg, turn Encoded-kbd mode on if and only if arg is positive.
4ed46869	304
a0d4676a	305	You should not turn this mode on manually, instead use the command
f7e5a632	306	\\[set-keyboard-coding-system] which turns on or off this mode
a0d4676a KH	307	automatically.
	308
	309	In Encoded-kbd mode, a text sent from keyboard is accepted
	310	as a multilingual text encoded in a coding system set by
f7e5a632	311	\\[set-keyboard-coding-system]."
586ec68a KH	312	(if encoded-kbd-mode
	313	;; We must at first reset input-mode to the original.
	314	(apply 'set-input-mode saved-input-mode))
4ed46869 KH	315	(setq encoded-kbd-mode
	316	(if (null arg) (null encoded-kbd-mode)
	317	(> (prefix-numeric-value arg) 0)))
	318	(if encoded-kbd-mode
586ec68a KH	319	(let ((coding (keyboard-coding-system)))
586ec68a KH	320	(setq saved-input-mode (current-input-mode))
4ed46869 KH	321	(cond ((null coding)
4ed46869 KH	322	(setq encoded-kbd-mode nil)
586ec68a	323	(error "No coding system for keyboard input is set"))
4ed46869	324
c4ede6a2	325	((= (coding-system-type coding) 1) ; SJIS
586ec68a KH	326	(set-input-mode
	327	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
	328	'use-8th-bit (nth 3 saved-input-mode))
4ed46869 KH	329	(setq encoded-kbd-coding 'sjis))
4ed46869 KH	330
c4ede6a2 KH	331	((= (coding-system-type coding) 2) ; ISO2022
c4ede6a2 KH	332	(if (aref (coding-system-flags coding) 7) ; 7-bit only
4ed46869	333	(setq encoded-kbd-coding 'iso2022-7)
586ec68a KH	334	(set-input-mode
	335	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
	336	'use-8th-bit (nth 3 saved-input-mode))
4ed46869	337	(setq encoded-kbd-coding 'iso2022-8))
4ed46869	338	(setq encoded-kbd-iso2022-designations (make-vector 4 nil))
c4ede6a2	339	(let ((flags (coding-system-flags coding))
4ed46869 KH	340	(i 0))
4ed46869 KH	341	(while (< i 4)
f61d15a7	342	(if (charsetp (aref flags i))
4ed46869	343	(aset encoded-kbd-iso2022-designations i
586ec68a KH	344	(aref flags i))
	345	(if (charsetp (car-safe (aref flags i)))
	346	(aset encoded-kbd-iso2022-designations i
	347	(car (aref flags i)))))
4ed46869	348	(setq i (1+ i))))
f61d15a7 KH	349	(setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
f61d15a7 KH	350	(aset encoded-kbd-iso2022-invocations 0 0)
4ed46869 KH	351	(aset encoded-kbd-iso2022-invocations 1 1))
4ed46869 KH	352
c4ede6a2	353	((= (coding-system-type coding) 3) ; BIG5
586ec68a KH	354	(set-input-mode
	355	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
	356	'use-8th-bit (nth 3 saved-input-mode))
4ed46869 KH	357	(setq encoded-kbd-coding 'big5))
4ed46869 KH	358
068b074e KH	359	((= (coding-system-type coding) 4) ; CCL based coding
	360	(set-input-mode
	361	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
	362	'use-8th-bit (nth 3 saved-input-mode))
	363	(setq encoded-kbd-coding 'ccl))
	364
4ed46869 KH	365	(t
	366	(setq encoded-kbd-mode nil)
	367	(error "Coding-system `%s' is not supported in Encoded-kbd mode"
	368	(keyboard-coding-system))))
068b074e	369	(encoded-kbd-setup-keymap coding)
586ec68a	370	(run-hooks 'encoded-kbd-mode-hook))))
4ed46869 KH	371
4ed46869 KH	372	;;; encoded-kb.el ends here