[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.

;;; Commentary:

;;; Code:

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

;; 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))
	(ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
	(vec [nil nil nil nil nil nil nil nil nil])
	result)
    (while (= (length (setq result (ccl-execute-on-string ccl vec str t))) 0)
      (dotimes (i 9) (aset vec i nil))
      (setq str (format "%s%c" str (read-char-exclusive))))
    (setq unread-command-events
	  (append result 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)

(put 'encoded-kbd-mode 'permanent-local t)
;;;###autoload
(define-minor-mode encoded-kbd-mode
  "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]."
  :global t
  ;; We must at first reset input-mode to the original.
  (if saved-input-mode (apply 'set-input-mode saved-input-mode))
  (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))))

(provide 'encoded-kb)

;;; encoded-kb.el ends here
Commit	Line	Data
60370d40	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	22
60370d40 PJ	23	;;; Commentary:
	24
	25	;;; Code:
	26
068b074e	27	(defconst encoded-kbd-mode-map (make-sparse-keymap)
4ed46869 KH	28	"Keymap for Encoded-kbd minor mode.")
4ed46869 KH	29
4ed46869 KH	30	;; Subsidiary keymaps for handling ISO2022 escape sequences.
	31
	32	(defvar encoded-kbd-iso2022-esc-map
	33	(let ((map (make-sparse-keymap)))
	34	(define-key map "$" 'encoded-kbd-iso2022-esc-dollar-prefix)
	35	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	36	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	37	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	38	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
4ed46869 KH	39	map)
4ed46869 KH	40	"Keymap for handling ESC code in Encoded-kbd mode.")
f61d15a7	41	(fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)
4ed46869 KH	42
	43	(defvar encoded-kbd-iso2022-esc-dollar-map
	44	(let ((map (make-sparse-keymap)))
	45	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	46	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	47	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	48	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
	49	(define-key map "@" 'encoded-kbd-iso2022-designation)
	50	(define-key map "A" 'encoded-kbd-iso2022-designation)
	51	(define-key map "B" 'encoded-kbd-iso2022-designation)
4ed46869	52	map)
f61d15a7	53	"Keymap for handling ESC $ sequence in Encoded-kbd mode.")
4ed46869 KH	54	(fset 'encoded-kbd-iso2022-esc-dollar-prefix
	55	encoded-kbd-iso2022-esc-dollar-map)
	56
	57	(defvar encoded-kbd-iso2022-designation-map
	58	(let ((map (make-sparse-keymap))
164edac8 KH	59	(l charset-list)
164edac8 KH	60	final-char)
f61d15a7	61	(while l
164edac8	62	(setq final-char (charset-iso-final-char (car l)))
71b898fe	63	(if (> final-char 0)
164edac8 KH	64	(define-key map (char-to-string final-char)
164edac8 KH	65	'encoded-kbd-iso2022-designation))
f61d15a7	66	(setq l (cdr l)))
4ed46869 KH	67	map)
	68	"Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
	69	(fset 'encoded-kbd-iso2022-designation-prefix
	70	encoded-kbd-iso2022-designation-map)
	71
	72	(defvar encoded-kbd-iso2022-non-ascii-map
	73	(let ((map (make-keymap))
	74	(i 32))
	75	(while (< i 128)
	76	(define-key map (char-to-string i) 'encoded-kbd-self-insert-iso2022-7bit)
	77	(setq i (1+ i)))
f61d15a7	78	(define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
a0d4676a KH	79	(setq i 160)
	80	(while (< i 256)
	81	(define-key map (vector i) 'encoded-kbd-handle-8bit)
	82	(setq i (1+ i)))
4ed46869 KH	83	map)
	84	"Keymap for handling non-ASCII character set in Encoded-kbd mode.")
	85
	86	;; One of the symbols `sjis', `iso2022-7', `iso2022-8', or `big5' to
	87	;; denote what kind of coding-system we are now handling in
	88	;; Encoded-kbd mode.
	89	(defvar encoded-kbd-coding nil)
	90
068b074e KH	91	;; Keep information of designation state of ISO2022 encoding. When
	92	;; Encoded-kbd mode is on, this is set to a vector of length 4, the
	93	;; elements are character sets currently designated to graphic
	94	;; registers 0 thru 3.
4ed46869 KH	95
4ed46869 KH	96	(defvar encoded-kbd-iso2022-designations nil)
4ed46869 KH	97	(put 'encoded-kbd-iso2022-designations 'permanent-local t)
4ed46869 KH	98
068b074e KH	99	;; Keep information of invocation state of ISO2022 encoding. When
	100	;; Encoded-kbd mode is on, this is set to a vector of length 3,
	101	;; graphic register numbers currently invoked to graphic plane 1 and
	102	;; 2, and a single shifted graphic register number.
4ed46869 KH	103
4ed46869 KH	104	(defvar encoded-kbd-iso2022-invocations nil)
4ed46869 KH	105	(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
	106
	107	(defun encoded-kbd-iso2022-designation ()
e8dd0160	108	"Do ISO2022 designation according to the current key in Encoded-kbd mode.
4ed46869 KH	109	The following key sequence may cause multilingual text insertion."
	110	(interactive)
	111	(let ((key-seq (this-command-keys))
a0d4676a KH	112	(prev-g0-charset (aref encoded-kbd-iso2022-designations
a0d4676a KH	113	(aref encoded-kbd-iso2022-invocations 0)))
4ed46869 KH	114	intermediate-char final-char
4ed46869 KH	115	reg dimension chars charset)
f61d15a7 KH	116	(if (= (length key-seq) 4)
	117	;; ESC $ <intermediate-char> <final-char>
	118	(setq intermediate-char (aref key-seq 2)
4ed46869 KH	119	dimension 2
4ed46869 KH	120	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	121	final-char (aref key-seq 3)
4ed46869 KH	122	reg (mod intermediate-char 4))
4ed46869 KH	123	(if (= (aref key-seq 1) ?$)
f61d15a7	124	;; ESC $ <final-char>
4ed46869 KH	125	(setq dimension 2
4ed46869 KH	126	chars 94
f61d15a7	127	final-char (aref key-seq 2)
4ed46869	128	reg 0)
f61d15a7 KH	129	;; ESC <intermediate-char> <final-char>
f61d15a7 KH	130	(setq intermediate-char (aref key-seq 1)
4ed46869 KH	131	dimension 1
4ed46869 KH	132	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	133	final-char (aref key-seq 2)
4ed46869 KH	134	reg (mod intermediate-char 4))))
	135	(if (setq charset (iso-charset dimension chars final-char))
	136	(aset encoded-kbd-iso2022-designations reg charset)
	137	(error "Character set of DIMENSION %s, CHARS %s, FINAL-CHAR `%c' is not supported"
	138	dimension chars final-char))
	139
f61d15a7	140	(if (memq (aref encoded-kbd-iso2022-designations
a0d4676a	141	(aref encoded-kbd-iso2022-invocations 0))
f61d15a7	142	'(ascii latin-jisx0201))
4ed46869 KH	143	;; Graphic plane 0 (0x20..0x7f) is for ASCII. We don't have
4ed46869 KH	144	;; to handle characters in this range specially.
a0d4676a	145	(if (not (memq prev-g0-charset '(ascii latin-jisx0201)))
e8dd0160	146	;; We must exit recursive edit now.
a0d4676a	147	(throw 'exit nil))
4ed46869	148	;; Graphic plane 0 is for non-ASCII.
a0d4676a	149	(if (memq prev-g0-charset '(ascii latin-jisx0201))
e8dd0160	150	;; We must handle keys specially.
a0d4676a KH	151	(let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
a0d4676a KH	152	(recursive-edit))))))
4ed46869 KH	153
4ed46869 KH	154	(defun encoded-kbd-handle-8bit ()
e8dd0160	155	"Handle an 8-bit character entered in Encoded-kbd mode."
4ed46869 KH	156	(interactive)
	157	(cond ((eq encoded-kbd-coding 'iso2022-7)
	158	(error "Can't handle the character code %d" last-command-char))
	159
	160	((eq encoded-kbd-coding 'iso2022-8)
	161	(cond ((= last-command-char ?\216)
	162	(aset encoded-kbd-iso2022-invocations 2 2))
	163
	164	((= last-command-char ?\217)
	165	(aset encoded-kbd-iso2022-invocations 2 3))
	166
75c44f31	167	((>= last-command-char ?\240)
4ed46869 KH	168	(encoded-kbd-self-insert-iso2022-8bit))
	169
	170	(t
	171	(error "Can't handle the character code %d"
	172	last-command-char))))
	173
	174	((eq encoded-kbd-coding 'sjis)
	175	(encoded-kbd-self-insert-sjis))
	176
	177	(t
	178	(encoded-kbd-self-insert-big5))))
	179
	180	(defun encoded-kbd-self-insert-iso2022-7bit ()
	181	(interactive)
	182	(let* ((charset (aref encoded-kbd-iso2022-designations
	183	(or (aref encoded-kbd-iso2022-invocations 2)
	184	(aref encoded-kbd-iso2022-invocations 0))))
946fdacf KH	185	(char (if (= (charset-dimension charset) 1)
	186	(make-char charset last-command-char)
	187	(make-char charset last-command-char (read-char-exclusive)))))
4ed46869	188	(aset encoded-kbd-iso2022-invocations 2 nil)
946fdacf	189	(setq unread-command-events (cons char unread-command-events))))
4ed46869 KH	190
	191	(defun encoded-kbd-self-insert-iso2022-8bit ()
	192	(interactive)
068b074e KH	193	(cond
	194	((= last-command-char ?\216) ; SS2 (Single Shift 2)
	195	(aset encoded-kbd-iso2022-invocations 2 2))
	196	((= last-command-char ?\217) ; SS3 (Single Shift 3)
	197	(aset encoded-kbd-iso2022-invocations 2 3))
	198	(t
33182c8a SM	199	(let* ((charset (aref encoded-kbd-iso2022-designations
	200	(or (aref encoded-kbd-iso2022-invocations 2)
	201	(aref encoded-kbd-iso2022-invocations 1))))
	202	(char (if (= (charset-dimension charset) 1)
	203	(make-char charset last-command-char)
068b074e KH	204	(make-char charset last-command-char
068b074e KH	205	(read-char-exclusive)))))
33182c8a	206	(aset encoded-kbd-iso2022-invocations 2 nil)
068b074e	207	(setq unread-command-events (cons char unread-command-events))))))
4ed46869 KH	208
	209	(defun encoded-kbd-self-insert-sjis ()
	210	(interactive)
946fdacf KH	211	(let ((char (if (or (< last-command-char ?\xA0) (>= last-command-char ?\xE0))
	212	(decode-sjis-char (+ (ash last-command-char 8)
	213	(read-char-exclusive)))
	214	(make-char 'katakana-jisx0201 last-command-char))))
	215	(setq unread-command-events (cons char unread-command-events))))
4ed46869 KH	216
	217	(defun encoded-kbd-self-insert-big5 ()
	218	(interactive)
946fdacf KH	219	(let ((char (decode-big5-char (+ (ash last-command-char 8)
	220	(read-char-exclusive)))))
	221	(setq unread-command-events (cons char unread-command-events))))
4ed46869	222
068b074e KH	223	(defun encoded-kbd-self-insert-ccl ()
	224	(interactive)
	225	(let ((str (char-to-string last-command-char))
4c8d5b4b	226	(ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
81a23e88	227	(vec [nil nil nil nil nil nil nil nil nil])
4c8d5b4b KH	228	result)
4c8d5b4b KH	229	(while (= (length (setq result (ccl-execute-on-string ccl vec str t))) 0)
81a23e88 KH	230	(dotimes (i 9) (aset vec i nil))
81a23e88 KH	231	(setq str (format "%s%c" str (read-char-exclusive))))
068b074e	232	(setq unread-command-events
17fd77dd	233	(append result unread-command-events))))
068b074e KH	234
	235	(defun encoded-kbd-setup-keymap (coding)
	236	;; At first, reset the keymap.
	237	(setcdr encoded-kbd-mode-map nil)
	238	;; Then setup the keymap according to the keyboard coding system.
	239	(cond
	240	((eq encoded-kbd-coding 'sjis)
	241	(let ((i 128))
	242	(while (< i 256)
	243	(define-key encoded-kbd-mode-map
	244	(vector i) 'encoded-kbd-self-insert-sjis)
	245	(setq i (1+ i)))))
	246
	247	((eq encoded-kbd-coding 'big5)
	248	(let ((i 161))
	249	(while (< i 255)
	250	(define-key encoded-kbd-mode-map
	251	(vector i) 'encoded-kbd-self-insert-big5)
	252	(setq i (1+ i)))))
	253
	254	((eq encoded-kbd-coding 'iso2022-7)
	255	(define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix))
a1506d29	256
068b074e KH	257	((eq encoded-kbd-coding 'iso2022-8)
	258	(define-key encoded-kbd-mode-map
	259	(vector ?\216) 'encoded-kbd-self-insert-iso2022-8bit)
	260	(define-key encoded-kbd-mode-map
	261	(vector ?\217) 'encoded-kbd-self-insert-iso2022-8bit)
	262	(let ((i 160))
	263	(while (< i 256)
	264	(define-key encoded-kbd-mode-map
	265	(vector i) 'encoded-kbd-self-insert-iso2022-8bit)
	266	(setq i (1+ i)))))
	267
	268	((eq encoded-kbd-coding 'ccl)
	269	(let ((valid-codes (or (coding-system-get coding 'valid-codes)
4c8d5b4b	270	'((128 . 255))))
068b074e KH	271	elt from to)
	272	(while valid-codes
	273	(setq elt (car valid-codes) valid-codes (cdr valid-codes))
	274	(if (consp elt)
	275	(setq from (car elt) to (cdr elt))
	276	(setq from (setq to elt)))
	277	(while (<= from to)
	278	(if (>= from 128)
	279	(define-key encoded-kbd-mode-map
	280	(vector from) 'encoded-kbd-self-insert-ccl))
	281	(setq from (1+ from))))))
	282
	283	(t
	284	(error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding))))
	285
	286
586ec68a KH	287	;; Input mode at the time Encoded-kbd mode is turned on is saved here.
	288	(defvar saved-input-mode nil)
	289
ff14aafb	290	(put 'encoded-kbd-mode 'permanent-local t)
f61d15a7	291	;;;###autoload
ff14aafb	292	(define-minor-mode encoded-kbd-mode
4ed46869	293	"Toggle Encoded-kbd minor mode.
586ec68a	294	With arg, turn Encoded-kbd mode on if and only if arg is positive.
4ed46869	295
a0d4676a	296	You should not turn this mode on manually, instead use the command
f7e5a632	297	\\[set-keyboard-coding-system] which turns on or off this mode
a0d4676a KH	298	automatically.
	299
	300	In Encoded-kbd mode, a text sent from keyboard is accepted
	301	as a multilingual text encoded in a coding system set by
f7e5a632	302	\\[set-keyboard-coding-system]."
ff14aafb SM	303	:global t
	304	;; We must at first reset input-mode to the original.
	305	(if saved-input-mode (apply 'set-input-mode saved-input-mode))
4ed46869	306	(if encoded-kbd-mode
586ec68a KH	307	(let ((coding (keyboard-coding-system)))
586ec68a KH	308	(setq saved-input-mode (current-input-mode))
4ed46869	309	(cond ((null coding)
a1506d29	310	(setq encoded-kbd-mode nil)
586ec68a	311	(error "No coding system for keyboard input is set"))
4ed46869	312
c4ede6a2	313	((= (coding-system-type coding) 1) ; SJIS
586ec68a KH	314	(set-input-mode
586ec68a KH	315	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
a1506d29	316	'use-8th-bit (nth 3 saved-input-mode))
4ed46869 KH	317	(setq encoded-kbd-coding 'sjis))
4ed46869 KH	318
c4ede6a2 KH	319	((= (coding-system-type coding) 2) ; ISO2022
c4ede6a2 KH	320	(if (aref (coding-system-flags coding) 7) ; 7-bit only
4ed46869	321	(setq encoded-kbd-coding 'iso2022-7)
586ec68a KH	322	(set-input-mode
586ec68a KH	323	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
a1506d29	324	'use-8th-bit (nth 3 saved-input-mode))
4ed46869	325	(setq encoded-kbd-coding 'iso2022-8))
4ed46869	326	(setq encoded-kbd-iso2022-designations (make-vector 4 nil))
c4ede6a2	327	(let ((flags (coding-system-flags coding))
4ed46869 KH	328	(i 0))
4ed46869 KH	329	(while (< i 4)
f61d15a7	330	(if (charsetp (aref flags i))
4ed46869	331	(aset encoded-kbd-iso2022-designations i
586ec68a KH	332	(aref flags i))
	333	(if (charsetp (car-safe (aref flags i)))
	334	(aset encoded-kbd-iso2022-designations i
	335	(car (aref flags i)))))
4ed46869	336	(setq i (1+ i))))
f61d15a7 KH	337	(setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
f61d15a7 KH	338	(aset encoded-kbd-iso2022-invocations 0 0)
4ed46869 KH	339	(aset encoded-kbd-iso2022-invocations 1 1))
4ed46869 KH	340
c4ede6a2	341	((= (coding-system-type coding) 3) ; BIG5
586ec68a KH	342	(set-input-mode
586ec68a KH	343	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
a1506d29	344	'use-8th-bit (nth 3 saved-input-mode))
4ed46869 KH	345	(setq encoded-kbd-coding 'big5))
4ed46869 KH	346
068b074e KH	347	((= (coding-system-type coding) 4) ; CCL based coding
	348	(set-input-mode
	349	(nth 0 saved-input-mode) (nth 1 saved-input-mode)
a1506d29	350	'use-8th-bit (nth 3 saved-input-mode))
068b074e KH	351	(setq encoded-kbd-coding 'ccl))
068b074e KH	352
4ed46869 KH	353	(t
	354	(setq encoded-kbd-mode nil)
	355	(error "Coding-system `%s' is not supported in Encoded-kbd mode"
	356	(keyboard-coding-system))))
ff14aafb	357	(encoded-kbd-setup-keymap coding))))
4ed46869	358
9c93c95a MR	359	(provide 'encoded-kb)
9c93c95a MR	360
4ed46869	361	;;; encoded-kb.el ends here