1 ;;; encoded-kb.el --- Handler to input multibyte characters encoded somehow
3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
4 ;; Licensed to the Free Software Foundation.
6 ;; This file is part of GNU Emacs.
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)
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.
18 ;; You should have received a copy of the GNU General Public License
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.
23 (defvar encoded-kbd-mode nil
24 "Non-nil if in Encoded-kbd minor mode.")
25 (put 'encoded-kbd-mode 'permanent-local t)
27 (let ((slot (assq 'encoded-kbd-mode minor-mode-alist))
28 (name " Encoded-kbd"))
30 (setcar (cdr slot) name)
31 (setq minor-mode-alist
32 (cons '(encoded-kbd-mode " Encoded-kbd") minor-mode-alist))))
34 (defconst encoded-kbd-mode-map (make-sparse-keymap)
35 "Keymap for Encoded-kbd minor mode.")
37 (let ((slot (assq 'encoded-kbd-mode minor-mode-map-alist)))
39 (setcdr slot encoded-kbd-mode-map)
40 (setq minor-mode-map-alist
41 (cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
42 minor-mode-map-alist))))
44 ;; Subsidiary keymaps for handling ISO2022 escape sequences.
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)
54 "Keymap for handling ESC code in Encoded-kbd mode.")
55 (fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)
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)
67 "Keymap for handling ESC $ sequence in Encoded-kbd mode.")
68 (fset 'encoded-kbd-iso2022-esc-dollar-prefix
69 encoded-kbd-iso2022-esc-dollar-map)
71 (defvar encoded-kbd-iso2022-designation-map
72 (let ((map (make-sparse-keymap))
76 (setq final-char (charset-iso-final-char (car l)))
78 (define-key map (char-to-string final-char)
79 'encoded-kbd-iso2022-designation))
82 "Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
83 (fset 'encoded-kbd-iso2022-designation-prefix
84 encoded-kbd-iso2022-designation-map)
86 (defvar encoded-kbd-iso2022-non-ascii-map
87 (let ((map (make-keymap))
90 (define-key map (char-to-string i) 'encoded-kbd-self-insert-iso2022-7bit)
92 (define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
95 (define-key map (vector i) 'encoded-kbd-handle-8bit)
98 "Keymap for handling non-ASCII character set in Encoded-kbd mode.")
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
103 (defvar encoded-kbd-coding nil)
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.
110 (defvar encoded-kbd-iso2022-designations nil)
111 (put 'encoded-kbd-iso2022-designations 'permanent-local t)
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.
118 (defvar encoded-kbd-iso2022-invocations nil)
119 (put 'encoded-kbd-iso2022-invocations 'permanent-local t)
121 (defun encoded-kbd-iso2022-designation ()
122 "Do ISO2022 designation according to the current key in Encoded-kbd mode.
123 The following key sequence may cause multilingual text insertion."
125 (let ((key-seq (this-command-keys))
126 (prev-g0-charset (aref encoded-kbd-iso2022-designations
127 (aref encoded-kbd-iso2022-invocations 0)))
128 intermediate-char final-char
129 reg dimension chars charset)
130 (if (= (length key-seq) 4)
131 ;; ESC $ <intermediate-char> <final-char>
132 (setq intermediate-char (aref key-seq 2)
134 chars (if (< intermediate-char ?,) 94 96)
135 final-char (aref key-seq 3)
136 reg (mod intermediate-char 4))
137 (if (= (aref key-seq 1) ?$)
138 ;; ESC $ <final-char>
141 final-char (aref key-seq 2)
143 ;; ESC <intermediate-char> <final-char>
144 (setq intermediate-char (aref key-seq 1)
146 chars (if (< intermediate-char ?,) 94 96)
147 final-char (aref key-seq 2)
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))
154 (if (memq (aref encoded-kbd-iso2022-designations
155 (aref encoded-kbd-iso2022-invocations 0))
156 '(ascii latin-jisx0201))
157 ;; Graphic plane 0 (0x20..0x7f) is for ASCII. We don't have
158 ;; to handle characters in this range specially.
159 (if (not (memq prev-g0-charset '(ascii latin-jisx0201)))
160 ;; We must exit recursive edit now.
162 ;; Graphic plane 0 is for non-ASCII.
163 (if (memq prev-g0-charset '(ascii latin-jisx0201))
164 ;; We must handle keys specially.
165 (let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
166 (recursive-edit))))))
168 (defun encoded-kbd-handle-8bit ()
169 "Handle an 8-bit character entered in Encoded-kbd mode."
171 (cond ((eq encoded-kbd-coding 'iso2022-7)
172 (error "Can't handle the character code %d" last-command-char))
174 ((eq encoded-kbd-coding 'iso2022-8)
175 (cond ((= last-command-char ?\216)
176 (aset encoded-kbd-iso2022-invocations 2 2))
178 ((= last-command-char ?\217)
179 (aset encoded-kbd-iso2022-invocations 2 3))
181 ((>= last-command-char ?\240)
182 (encoded-kbd-self-insert-iso2022-8bit))
185 (error "Can't handle the character code %d"
186 last-command-char))))
188 ((eq encoded-kbd-coding 'sjis)
189 (encoded-kbd-self-insert-sjis))
192 (encoded-kbd-self-insert-big5))))
194 (defun encoded-kbd-self-insert-iso2022-7bit ()
196 (let* ((charset (aref encoded-kbd-iso2022-designations
197 (or (aref encoded-kbd-iso2022-invocations 2)
198 (aref encoded-kbd-iso2022-invocations 0))))
199 (char (if (= (charset-dimension charset) 1)
200 (make-char charset last-command-char)
201 (make-char charset last-command-char (read-char-exclusive)))))
202 (aset encoded-kbd-iso2022-invocations 2 nil)
203 (setq unread-command-events (cons char unread-command-events))))
205 (defun encoded-kbd-self-insert-iso2022-8bit ()
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))
213 (let* ((charset (aref encoded-kbd-iso2022-designations
214 (or (aref encoded-kbd-iso2022-invocations 2)
215 (aref encoded-kbd-iso2022-invocations 1))))
216 (char (if (= (charset-dimension charset) 1)
217 (make-char charset last-command-char)
218 (make-char charset last-command-char
219 (read-char-exclusive)))))
220 (aset encoded-kbd-iso2022-invocations 2 nil)
221 (setq unread-command-events (cons char unread-command-events))))))
223 (defun encoded-kbd-self-insert-sjis ()
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))))
231 (defun encoded-kbd-self-insert-big5 ()
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))))
237 (defun encoded-kbd-self-insert-ccl ()
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))))
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.
250 ((eq encoded-kbd-coding 'sjis)
253 (define-key encoded-kbd-mode-map
254 (vector i) 'encoded-kbd-self-insert-sjis)
257 ((eq encoded-kbd-coding 'big5)
260 (define-key encoded-kbd-mode-map
261 (vector i) 'encoded-kbd-self-insert-big5)
264 ((eq encoded-kbd-coding 'iso2022-7)
265 (define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix))
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)
274 (define-key encoded-kbd-mode-map
275 (vector i) 'encoded-kbd-self-insert-iso2022-8bit)
278 ((eq encoded-kbd-coding 'ccl)
279 (let ((valid-codes (or (coding-system-get coding 'valid-codes)
283 (setq elt (car valid-codes) valid-codes (cdr valid-codes))
285 (setq from (car elt) to (cdr elt))
286 (setq from (setq to elt)))
289 (define-key encoded-kbd-mode-map
290 (vector from) 'encoded-kbd-self-insert-ccl))
291 (setq from (1+ from))))))
294 (error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding))))
297 ;; Input mode at the time Encoded-kbd mode is turned on is saved here.
298 (defvar saved-input-mode nil)
301 (defun encoded-kbd-mode (&optional arg)
302 "Toggle Encoded-kbd minor mode.
303 With arg, turn Encoded-kbd mode on if and only if arg is positive.
305 You should not turn this mode on manually, instead use the command
306 \\[set-keyboard-coding-system] which turns on or off this mode
309 In Encoded-kbd mode, a text sent from keyboard is accepted
310 as a multilingual text encoded in a coding system set by
311 \\[set-keyboard-coding-system]."
313 ;; We must at first reset input-mode to the original.
314 (apply 'set-input-mode saved-input-mode))
315 (setq encoded-kbd-mode
316 (if (null arg) (null encoded-kbd-mode)
317 (> (prefix-numeric-value arg) 0)))
319 (let ((coding (keyboard-coding-system)))
320 (setq saved-input-mode (current-input-mode))
322 (setq encoded-kbd-mode nil)
323 (error "No coding system for keyboard input is set"))
325 ((= (coding-system-type coding) 1) ; SJIS
327 (nth 0 saved-input-mode) (nth 1 saved-input-mode)
328 'use-8th-bit (nth 3 saved-input-mode))
329 (setq encoded-kbd-coding 'sjis))
331 ((= (coding-system-type coding) 2) ; ISO2022
332 (if (aref (coding-system-flags coding) 7) ; 7-bit only
333 (setq encoded-kbd-coding 'iso2022-7)
335 (nth 0 saved-input-mode) (nth 1 saved-input-mode)
336 'use-8th-bit (nth 3 saved-input-mode))
337 (setq encoded-kbd-coding 'iso2022-8))
338 (setq encoded-kbd-iso2022-designations (make-vector 4 nil))
339 (let ((flags (coding-system-flags coding))
342 (if (charsetp (aref flags i))
343 (aset encoded-kbd-iso2022-designations i
345 (if (charsetp (car-safe (aref flags i)))
346 (aset encoded-kbd-iso2022-designations i
347 (car (aref flags i)))))
349 (setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
350 (aset encoded-kbd-iso2022-invocations 0 0)
351 (aset encoded-kbd-iso2022-invocations 1 1))
353 ((= (coding-system-type coding) 3) ; BIG5
355 (nth 0 saved-input-mode) (nth 1 saved-input-mode)
356 'use-8th-bit (nth 3 saved-input-mode))
357 (setq encoded-kbd-coding 'big5))
359 ((= (coding-system-type coding) 4) ; CCL based coding
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))
366 (setq encoded-kbd-mode nil)
367 (error "Coding-system `%s' is not supported in Encoded-kbd mode"
368 (keyboard-coding-system))))
369 (encoded-kbd-setup-keymap coding)
370 (run-hooks 'encoded-kbd-mode-hook))))
372 ;;; encoded-kb.el ends here