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

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

;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006
;;   Free Software Foundation, Inc.
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
;;   2005, 2006
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H14PRO021

;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;;; Code:

;; Usually this map is empty (even if Encoded-kbd mode is on), but if
;; the keyboard coding system is iso-2022-based, it defines dummy key
;; bindings for ESC $ ..., etc. so that those bindings in
;; key-translation-map take effect.
(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)

;; 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)

(defsubst encoded-kbd-last-key ()
  (let ((keys (this-single-command-keys)))
    (aref keys (1- (length keys)))))

(defun encoded-kbd-iso2022-designation (ignore)
  "Do ISO2022 designation according to the current key in Encoded-kbd mode.
The following key sequence may cause multilingual text insertion."
  (let ((key-seq (this-single-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))))
    (aset encoded-kbd-iso2022-designations reg
	  (iso-charset dimension chars final-char)))
  "")

(defun encoded-kbd-iso2022-single-shift (ignore)
  (let ((char (encoded-kbd-last-key)))
    (aset encoded-kbd-iso2022-invocations 2 (if (= char ?\216) 2 3)))
  "")

(defun encoded-kbd-self-insert-iso2022-7bit (ignore)
  (let ((char (encoded-kbd-last-key))
	(charset (aref encoded-kbd-iso2022-designations
		       (or (aref encoded-kbd-iso2022-invocations 2)
			   (aref encoded-kbd-iso2022-invocations 0)))))
    (aset encoded-kbd-iso2022-invocations 2 nil)
    (vector (if (= (charset-dimension charset) 1)
		(make-char charset char)
	      (make-char charset char (read-char-exclusive))))))

(defun encoded-kbd-self-insert-iso2022-8bit (ignore)
  (let ((char (encoded-kbd-last-key))
	(charset (aref encoded-kbd-iso2022-designations
		       (or (aref encoded-kbd-iso2022-invocations 2)
			   (aref encoded-kbd-iso2022-invocations 1)))))
    (aset encoded-kbd-iso2022-invocations 2 nil)
    (vector (if (= (charset-dimension charset) 1)
		(make-char charset char)
	      (make-char charset char (read-char-exclusive))))))

(defun encoded-kbd-self-insert-sjis (ignore)
  (let ((char (encoded-kbd-last-key)))
    (vector
     (if (or (< char ?\xA0) (>= char ?\xE0))
	 (decode-sjis-char (+ (ash char 8) (read-char-exclusive)))
       (make-char 'katakana-jisx0201 char)))))

(defun encoded-kbd-self-insert-big5 (ignore)
  (let ((char (encoded-kbd-last-key)))
    (vector 
     (decode-big5-char (+ (ash char 8) (read-char-exclusive))))))

(defun encoded-kbd-self-insert-ccl (ignore)
  (let ((str (char-to-string (encoded-kbd-last-key)))
	(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))))
    (vector (aref result 0))))

(defun encoded-kbd-setup-keymap (coding)
  ;; At first, reset the keymap.
  (define-key encoded-kbd-mode-map "\e" nil)
  ;; Then setup the keymap according to the keyboard coding system.
  (cond
   ((eq (coding-system-type coding) 1)	; SJIS
    (let ((i 128))
      (while (< i 256)
	(define-key key-translation-map
	  (vector i) 'encoded-kbd-self-insert-sjis)
	(setq i (1+ i))))
    8)

   ((eq (coding-system-type coding) 3)	; Big5
    (let ((i 161))
      (while (< i 255)
	(define-key key-translation-map
	  (vector i) 'encoded-kbd-self-insert-big5)
	(setq i (1+ i))))
    8)

   ((eq (coding-system-type coding) 2) ; ISO-2022
    (let ((flags (coding-system-flags coding))
	  use-designation)
      (if (aref flags 8)
	  nil				; Don't support locking-shift.
	(setq encoded-kbd-iso2022-designations (make-vector 4 nil)
	      encoded-kbd-iso2022-invocations (make-vector 3 nil))
	(dotimes (i 4)
	  (if (aref flags i)
	      (if (charsetp (aref flags i))
		  (aset encoded-kbd-iso2022-designations
			i (aref flags i))
		(setq use-designation t)
		(if (charsetp (car-safe (aref flags i)))
		    (aset encoded-kbd-iso2022-designations
			  i (car (aref flags i)))))))
	(aset encoded-kbd-iso2022-invocations 0 0)
	(if (aref encoded-kbd-iso2022-designations 1)
	    (aset encoded-kbd-iso2022-invocations 1 1))
	(when use-designation
	  (define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix)
	  (define-key key-translation-map "\e" 'encoded-kbd-iso2022-esc-prefix))
	(when (or (aref flags 2) (aref flags 3))
	  (define-key key-translation-map
	    [?\216] 'encoded-kbd-iso2022-single-shift)
	  (define-key key-translation-map
	    [?\217] 'encoded-kbd-iso2022-single-shift))
	(or (eq (aref flags 0) 'ascii)
	    (dotimes (i 96)
	      (define-key key-translation-map
		(vector (+ 32 i)) 'encoded-kbd-self-insert-iso2022-7bit)))
	(if (aref flags 7)
	    t
	  (dotimes (i 96)
	    (define-key key-translation-map
	      (vector (+ 160 i)) 'encoded-kbd-self-insert-iso2022-8bit))
	  8))))

   ((eq (coding-system-type coding) 4)	; CCL-base
    (let ((valid-codes (or (coding-system-get coding 'valid-codes)
			   '((128 . 255))))
	  elt from to valid)
      (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 key-translation-map
		(vector from) 'encoded-kbd-self-insert-ccl))
	  (setq from (1+ from))))
      8))

   (t
    nil)))

;; key-translation-map at the time Encoded-kbd mode is turned on is
;; saved here.
(defvar saved-key-translation-map nil)

;; 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 :group 'keyboard :group 'mule

  (if encoded-kbd-mode
      ;; We are turning on Encoded-kbd mode.
      (let ((coding (keyboard-coding-system))
	    result)
	(or saved-key-translation-map
	    (if (keymapp key-translation-map)
		(setq saved-key-translation-map
		      (copy-keymap key-translation-map))
	      (setq key-translation-map (make-sparse-keymap))))
	(or saved-input-mode
	    (setq saved-input-mode
		  (current-input-mode)))
	(setq result (and coding (encoded-kbd-setup-keymap coding)))
	(if result
	    (if (eq result 8)
		(set-input-mode
		 (nth 0 saved-input-mode) 
		 (nth 1 saved-input-mode)
		 'use-8th-bit
		 (nth 3 saved-input-mode)))
	  (setq encoded-kbd-mode nil
		saved-key-translation-map nil
		saved-input-mode nil)
	  (error "Unsupported coding system in Encoded-kbd mode: %S"
		 coding)))

    ;; We are turning off Encoded-kbd mode.
    (setq key-translation-map saved-key-translation-map
	  saved-key-translation-map nil)
    (apply 'set-input-mode saved-input-mode)
    (setq saved-input-mode nil)))

(provide 'encoded-kb)

;;; arch-tag: 76f0f9b3-65e7-45c3-b692-59509a87ad44
;;; encoded-kb.el ends here
Commit	Line	Data
60370d40	1	;;; encoded-kb.el --- handler to input multibyte characters encoded somehow
4ed46869	2
d4877ac1 GM	3	;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006
d4877ac1 GM	4	;; Free Software Foundation, Inc.
7976eda0 KH	5	;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
7976eda0 KH	6	;; 2005, 2006
2fd125a3 KH	7	;; National Institute of Advanced Industrial Science and Technology (AIST)
2fd125a3 KH	8	;; Registration Number H14PRO021
4ed46869 KH	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 2, or (at your option)
	15	;; 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
369314dc	23	;; along with GNU Emacs; see the file COPYING. If not, write to the
3a35cf56 LK	24	;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
3a35cf56 LK	25	;; Boston, MA 02110-1301, USA.
4ed46869	26
60370d40 PJ	27	;;; Commentary:
	28
	29	;;; Code:
	30
5dda46a3 KH	31	;; Usually this map is empty (even if Encoded-kbd mode is on), but if
	32	;; the keyboard coding system is iso-2022-based, it defines dummy key
	33	;; bindings for ESC $ ..., etc. so that those bindings in
	34	;; key-translation-map take effect.
068b074e	35	(defconst encoded-kbd-mode-map (make-sparse-keymap)
4ed46869 KH	36	"Keymap for Encoded-kbd minor mode.")
4ed46869 KH	37
4ed46869 KH	38	;; Subsidiary keymaps for handling ISO2022 escape sequences.
	39
	40	(defvar encoded-kbd-iso2022-esc-map
	41	(let ((map (make-sparse-keymap)))
	42	(define-key map "$" 'encoded-kbd-iso2022-esc-dollar-prefix)
	43	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	44	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	45	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	46	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
4ed46869 KH	47	map)
4ed46869 KH	48	"Keymap for handling ESC code in Encoded-kbd mode.")
f61d15a7	49	(fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)
4ed46869 KH	50
	51	(defvar encoded-kbd-iso2022-esc-dollar-map
	52	(let ((map (make-sparse-keymap)))
	53	(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
	54	(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
	55	(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
	56	(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
	57	(define-key map "@" 'encoded-kbd-iso2022-designation)
	58	(define-key map "A" 'encoded-kbd-iso2022-designation)
	59	(define-key map "B" 'encoded-kbd-iso2022-designation)
4ed46869	60	map)
f61d15a7	61	"Keymap for handling ESC $ sequence in Encoded-kbd mode.")
4ed46869 KH	62	(fset 'encoded-kbd-iso2022-esc-dollar-prefix
	63	encoded-kbd-iso2022-esc-dollar-map)
	64
	65	(defvar encoded-kbd-iso2022-designation-map
	66	(let ((map (make-sparse-keymap))
164edac8 KH	67	(l charset-list)
164edac8 KH	68	final-char)
f61d15a7	69	(while l
164edac8	70	(setq final-char (charset-iso-final-char (car l)))
71b898fe	71	(if (> final-char 0)
164edac8 KH	72	(define-key map (char-to-string final-char)
164edac8 KH	73	'encoded-kbd-iso2022-designation))
f61d15a7	74	(setq l (cdr l)))
4ed46869 KH	75	map)
	76	"Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
	77	(fset 'encoded-kbd-iso2022-designation-prefix
	78	encoded-kbd-iso2022-designation-map)
	79
068b074e KH	80	;; Keep information of designation state of ISO2022 encoding. When
	81	;; Encoded-kbd mode is on, this is set to a vector of length 4, the
	82	;; elements are character sets currently designated to graphic
	83	;; registers 0 thru 3.
4ed46869 KH	84
4ed46869 KH	85	(defvar encoded-kbd-iso2022-designations nil)
4ed46869 KH	86	(put 'encoded-kbd-iso2022-designations 'permanent-local t)
4ed46869 KH	87
068b074e KH	88	;; Keep information of invocation state of ISO2022 encoding. When
	89	;; Encoded-kbd mode is on, this is set to a vector of length 3,
	90	;; graphic register numbers currently invoked to graphic plane 1 and
	91	;; 2, and a single shifted graphic register number.
4ed46869 KH	92
4ed46869 KH	93	(defvar encoded-kbd-iso2022-invocations nil)
4ed46869 KH	94	(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
4ed46869 KH	95
5dda46a3 KH	96	(defsubst encoded-kbd-last-key ()
	97	(let ((keys (this-single-command-keys)))
	98	(aref keys (1- (length keys)))))
	99
	100	(defun encoded-kbd-iso2022-designation (ignore)
e8dd0160	101	"Do ISO2022 designation according to the current key in Encoded-kbd mode.
4ed46869	102	The following key sequence may cause multilingual text insertion."
5dda46a3	103	(let ((key-seq (this-single-command-keys))
a0d4676a KH	104	(prev-g0-charset (aref encoded-kbd-iso2022-designations
a0d4676a KH	105	(aref encoded-kbd-iso2022-invocations 0)))
4ed46869 KH	106	intermediate-char final-char
4ed46869 KH	107	reg dimension chars charset)
f61d15a7 KH	108	(if (= (length key-seq) 4)
	109	;; ESC $ <intermediate-char> <final-char>
	110	(setq intermediate-char (aref key-seq 2)
4ed46869 KH	111	dimension 2
4ed46869 KH	112	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	113	final-char (aref key-seq 3)
4ed46869 KH	114	reg (mod intermediate-char 4))
4ed46869 KH	115	(if (= (aref key-seq 1) ?$)
f61d15a7	116	;; ESC $ <final-char>
4ed46869 KH	117	(setq dimension 2
4ed46869 KH	118	chars 94
f61d15a7	119	final-char (aref key-seq 2)
4ed46869	120	reg 0)
f61d15a7 KH	121	;; ESC <intermediate-char> <final-char>
f61d15a7 KH	122	(setq intermediate-char (aref key-seq 1)
4ed46869 KH	123	dimension 1
4ed46869 KH	124	chars (if (< intermediate-char ?,) 94 96)
f61d15a7	125	final-char (aref key-seq 2)
4ed46869	126	reg (mod intermediate-char 4))))
5dda46a3 KH	127	(aset encoded-kbd-iso2022-designations reg
	128	(iso-charset dimension chars final-char)))
	129	"")
	130
	131	(defun encoded-kbd-iso2022-single-shift (ignore)
	132	(let ((char (encoded-kbd-last-key)))
e1a050dc	133	(aset encoded-kbd-iso2022-invocations 2 (if (= char ?\216) 2 3)))
5dda46a3 KH	134	"")
	135
	136	(defun encoded-kbd-self-insert-iso2022-7bit (ignore)
	137	(let ((char (encoded-kbd-last-key))
	138	(charset (aref encoded-kbd-iso2022-designations
	139	(or (aref encoded-kbd-iso2022-invocations 2)
	140	(aref encoded-kbd-iso2022-invocations 0)))))
4ed46869	141	(aset encoded-kbd-iso2022-invocations 2 nil)
5dda46a3 KH	142	(vector (if (= (charset-dimension charset) 1)
	143	(make-char charset char)
	144	(make-char charset char (read-char-exclusive))))))
	145
	146	(defun encoded-kbd-self-insert-iso2022-8bit (ignore)
	147	(let ((char (encoded-kbd-last-key))
	148	(charset (aref encoded-kbd-iso2022-designations
	149	(or (aref encoded-kbd-iso2022-invocations 2)
	150	(aref encoded-kbd-iso2022-invocations 1)))))
	151	(aset encoded-kbd-iso2022-invocations 2 nil)
	152	(vector (if (= (charset-dimension charset) 1)
	153	(make-char charset char)
	154	(make-char charset char (read-char-exclusive))))))
	155
	156	(defun encoded-kbd-self-insert-sjis (ignore)
	157	(let ((char (encoded-kbd-last-key)))
	158	(vector
	159	(if (or (< char ?\xA0) (>= char ?\xE0))
	160	(decode-sjis-char (+ (ash char 8) (read-char-exclusive)))
	161	(make-char 'katakana-jisx0201 char)))))
	162
	163	(defun encoded-kbd-self-insert-big5 (ignore)
	164	(let ((char (encoded-kbd-last-key)))
	165	(vector
	166	(decode-big5-char (+ (ash char 8) (read-char-exclusive))))))
	167
	168	(defun encoded-kbd-self-insert-ccl (ignore)
	169	(let ((str (char-to-string (encoded-kbd-last-key)))
4c8d5b4b	170	(ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
81a23e88	171	(vec [nil nil nil nil nil nil nil nil nil])
4c8d5b4b KH	172	result)
4c8d5b4b KH	173	(while (= (length (setq result (ccl-execute-on-string ccl vec str t))) 0)
81a23e88 KH	174	(dotimes (i 9) (aset vec i nil))
81a23e88 KH	175	(setq str (format "%s%c" str (read-char-exclusive))))
5dda46a3	176	(vector (aref result 0))))
068b074e KH	177
	178	(defun encoded-kbd-setup-keymap (coding)
	179	;; At first, reset the keymap.
5dda46a3	180	(define-key encoded-kbd-mode-map "\e" nil)
068b074e KH	181	;; Then setup the keymap according to the keyboard coding system.
068b074e KH	182	(cond
5dda46a3	183	((eq (coding-system-type coding) 1) ; SJIS
068b074e KH	184	(let ((i 128))
068b074e KH	185	(while (< i 256)
af1781ac	186	(define-key key-translation-map
068b074e	187	(vector i) 'encoded-kbd-self-insert-sjis)
5dda46a3 KH	188	(setq i (1+ i))))
5dda46a3 KH	189	8)
068b074e	190
5dda46a3	191	((eq (coding-system-type coding) 3) ; Big5
068b074e KH	192	(let ((i 161))
068b074e KH	193	(while (< i 255)
af1781ac	194	(define-key key-translation-map
068b074e	195	(vector i) 'encoded-kbd-self-insert-big5)
5dda46a3 KH	196	(setq i (1+ i))))
	197	8)
	198
	199	((eq (coding-system-type coding) 2) ; ISO-2022
	200	(let ((flags (coding-system-flags coding))
	201	use-designation)
	202	(if (aref flags 8)
	203	nil ; Don't support locking-shift.
	204	(setq encoded-kbd-iso2022-designations (make-vector 4 nil)
	205	encoded-kbd-iso2022-invocations (make-vector 3 nil))
	206	(dotimes (i 4)
	207	(if (aref flags i)
	208	(if (charsetp (aref flags i))
	209	(aset encoded-kbd-iso2022-designations
	210	i (aref flags i))
	211	(setq use-designation t)
	212	(if (charsetp (car-safe (aref flags i)))
	213	(aset encoded-kbd-iso2022-designations
	214	i (car (aref flags i)))))))
	215	(aset encoded-kbd-iso2022-invocations 0 0)
	216	(if (aref encoded-kbd-iso2022-designations 1)
	217	(aset encoded-kbd-iso2022-invocations 1 1))
	218	(when use-designation
	219	(define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix)
	220	(define-key key-translation-map "\e" 'encoded-kbd-iso2022-esc-prefix))
	221	(when (or (aref flags 2) (aref flags 3))
	222	(define-key key-translation-map
	223	[?\216] 'encoded-kbd-iso2022-single-shift)
	224	(define-key key-translation-map
	225	[?\217] 'encoded-kbd-iso2022-single-shift))
	226	(or (eq (aref flags 0) 'ascii)
	227	(dotimes (i 96)
	228	(define-key key-translation-map
	229	(vector (+ 32 i)) 'encoded-kbd-self-insert-iso2022-7bit)))
	230	(if (aref flags 7)
	231	t
	232	(dotimes (i 96)
	233	(define-key key-translation-map
	234	(vector (+ 160 i)) 'encoded-kbd-self-insert-iso2022-8bit))
	235	8))))
	236
	237	((eq (coding-system-type coding) 4) ; CCL-base
068b074e	238	(let ((valid-codes (or (coding-system-get coding 'valid-codes)
4c8d5b4b	239	'((128 . 255))))
5dda46a3	240	elt from to valid)
068b074e KH	241	(while valid-codes
	242	(setq elt (car valid-codes) valid-codes (cdr valid-codes))
	243	(if (consp elt)
	244	(setq from (car elt) to (cdr elt))
	245	(setq from (setq to elt)))
	246	(while (<= from to)
	247	(if (>= from 128)
5dda46a3	248	(define-key key-translation-map
068b074e	249	(vector from) 'encoded-kbd-self-insert-ccl))
5dda46a3 KH	250	(setq from (1+ from))))
5dda46a3 KH	251	8))
068b074e KH	252
068b074e KH	253	(t
5dda46a3	254	nil)))
068b074e	255
5dda46a3 KH	256	;; key-translation-map at the time Encoded-kbd mode is turned on is
	257	;; saved here.
	258	(defvar saved-key-translation-map nil)
068b074e	259
586ec68a KH	260	;; Input mode at the time Encoded-kbd mode is turned on is saved here.
	261	(defvar saved-input-mode nil)
	262
ff14aafb	263	(put 'encoded-kbd-mode 'permanent-local t)
f61d15a7	264	;;;###autoload
ff14aafb	265	(define-minor-mode encoded-kbd-mode
4ed46869	266	"Toggle Encoded-kbd minor mode.
586ec68a	267	With arg, turn Encoded-kbd mode on if and only if arg is positive.
4ed46869	268
a0d4676a	269	You should not turn this mode on manually, instead use the command
f7e5a632	270	\\[set-keyboard-coding-system] which turns on or off this mode
a0d4676a KH	271	automatically.
	272
	273	In Encoded-kbd mode, a text sent from keyboard is accepted
	274	as a multilingual text encoded in a coding system set by
f7e5a632	275	\\[set-keyboard-coding-system]."
64a2e5ca	276	:global t :group 'keyboard :group 'mule
5dda46a3	277
4ed46869	278	(if encoded-kbd-mode
5dda46a3 KH	279	;; We are turning on Encoded-kbd mode.
	280	(let ((coding (keyboard-coding-system))
	281	result)
	282	(or saved-key-translation-map
	283	(if (keymapp key-translation-map)
	284	(setq saved-key-translation-map
	285	(copy-keymap key-translation-map))
	286	(setq key-translation-map (make-sparse-keymap))))
	287	(or saved-input-mode
	288	(setq saved-input-mode
	289	(current-input-mode)))
	290	(setq result (and coding (encoded-kbd-setup-keymap coding)))
	291	(if result
	292	(if (eq result 8)
	293	(set-input-mode
	294	(nth 0 saved-input-mode)
	295	(nth 1 saved-input-mode)
	296	'use-8th-bit
	297	(nth 3 saved-input-mode)))
	298	(setq encoded-kbd-mode nil
	299	saved-key-translation-map nil
	300	saved-input-mode nil)
	301	(error "Unsupported coding system in Encoded-kbd mode: %S"
	302	coding)))
	303
	304	;; We are turning off Encoded-kbd mode.
	305	(setq key-translation-map saved-key-translation-map
	306	saved-key-translation-map nil)
	307	(apply 'set-input-mode saved-input-mode)
	308	(setq saved-input-mode nil)))
4ed46869	309
9c93c95a MR	310	(provide 'encoded-kb)
9c93c95a MR	311
ab5796a9	312	;;; arch-tag: 76f0f9b3-65e7-45c3-b692-59509a87ad44
4ed46869	313	;;; encoded-kb.el ends here