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.
27 (defconst encoded-kbd-mode-map
(make-sparse-keymap)
28 "Keymap for Encoded-kbd minor mode.")
30 ;; Subsidiary keymaps for handling ISO2022 escape sequences.
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
)
40 "Keymap for handling ESC code in Encoded-kbd mode.")
41 (fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map
)
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
)
53 "Keymap for handling ESC $ sequence in Encoded-kbd mode.")
54 (fset 'encoded-kbd-iso2022-esc-dollar-prefix
55 encoded-kbd-iso2022-esc-dollar-map
)
57 (defvar encoded-kbd-iso2022-designation-map
58 (let ((map (make-sparse-keymap))
62 (setq final-char
(charset-iso-final-char (car l
)))
64 (define-key map
(char-to-string final-char
)
65 'encoded-kbd-iso2022-designation
))
68 "Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
69 (fset 'encoded-kbd-iso2022-designation-prefix
70 encoded-kbd-iso2022-designation-map
)
72 (defvar encoded-kbd-iso2022-non-ascii-map
73 (let ((map (make-keymap))
76 (define-key map
(char-to-string i
) 'encoded-kbd-self-insert-iso2022-7bit
)
78 (define-key map
"\e" 'encoded-kbd-iso2022-esc-prefix
)
81 (define-key map
(vector i
) 'encoded-kbd-handle-8bit
)
84 "Keymap for handling non-ASCII character set in Encoded-kbd mode.")
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
89 (defvar encoded-kbd-coding nil
)
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.
96 (defvar encoded-kbd-iso2022-designations nil
)
97 (put 'encoded-kbd-iso2022-designations
'permanent-local t
)
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.
104 (defvar encoded-kbd-iso2022-invocations nil
)
105 (put 'encoded-kbd-iso2022-invocations
'permanent-local t
)
107 (defun encoded-kbd-iso2022-designation ()
108 "Do ISO2022 designation according to the current key in Encoded-kbd mode.
109 The following key sequence may cause multilingual text insertion."
111 (let ((key-seq (this-command-keys))
112 (prev-g0-charset (aref encoded-kbd-iso2022-designations
113 (aref encoded-kbd-iso2022-invocations
0)))
114 intermediate-char final-char
115 reg dimension chars charset
)
116 (if (= (length key-seq
) 4)
117 ;; ESC $ <intermediate-char> <final-char>
118 (setq intermediate-char
(aref key-seq
2)
120 chars
(if (< intermediate-char ?
,) 94 96)
121 final-char
(aref key-seq
3)
122 reg
(mod intermediate-char
4))
123 (if (= (aref key-seq
1) ?$
)
124 ;; ESC $ <final-char>
127 final-char
(aref key-seq
2)
129 ;; ESC <intermediate-char> <final-char>
130 (setq intermediate-char
(aref key-seq
1)
132 chars
(if (< intermediate-char ?
,) 94 96)
133 final-char
(aref key-seq
2)
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
))
140 (if (memq (aref encoded-kbd-iso2022-designations
141 (aref encoded-kbd-iso2022-invocations
0))
142 '(ascii latin-jisx0201
))
143 ;; Graphic plane 0 (0x20..0x7f) is for ASCII. We don't have
144 ;; to handle characters in this range specially.
145 (if (not (memq prev-g0-charset
'(ascii latin-jisx0201
)))
146 ;; We must exit recursive edit now.
148 ;; Graphic plane 0 is for non-ASCII.
149 (if (memq prev-g0-charset
'(ascii latin-jisx0201
))
150 ;; We must handle keys specially.
151 (let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map
))
152 (recursive-edit))))))
154 (defun encoded-kbd-handle-8bit ()
155 "Handle an 8-bit character entered in Encoded-kbd mode."
157 (cond ((eq encoded-kbd-coding
'iso2022-7
)
158 (error "Can't handle the character code %d" last-command-char
))
160 ((eq encoded-kbd-coding
'iso2022-8
)
161 (cond ((= last-command-char ?
\216)
162 (aset encoded-kbd-iso2022-invocations
2 2))
164 ((= last-command-char ?
\217)
165 (aset encoded-kbd-iso2022-invocations
2 3))
167 ((>= last-command-char ?
\240)
168 (encoded-kbd-self-insert-iso2022-8bit))
171 (error "Can't handle the character code %d"
172 last-command-char
))))
174 ((eq encoded-kbd-coding
'sjis
)
175 (encoded-kbd-self-insert-sjis))
178 (encoded-kbd-self-insert-big5))))
180 (defun encoded-kbd-self-insert-iso2022-7bit ()
182 (let* ((charset (aref encoded-kbd-iso2022-designations
183 (or (aref encoded-kbd-iso2022-invocations
2)
184 (aref encoded-kbd-iso2022-invocations
0))))
185 (char (if (= (charset-dimension charset
) 1)
186 (make-char charset last-command-char
)
187 (make-char charset last-command-char
(read-char-exclusive)))))
188 (aset encoded-kbd-iso2022-invocations
2 nil
)
189 (setq unread-command-events
(cons char unread-command-events
))))
191 (defun encoded-kbd-self-insert-iso2022-8bit ()
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))
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
)
204 (make-char charset last-command-char
205 (read-char-exclusive)))))
206 (aset encoded-kbd-iso2022-invocations
2 nil
)
207 (setq unread-command-events
(cons char unread-command-events
))))))
209 (defun encoded-kbd-self-insert-sjis ()
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
))))
217 (defun encoded-kbd-self-insert-big5 ()
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
))))
223 (defun encoded-kbd-self-insert-ccl ()
225 (let ((str (char-to-string last-command-char
))
226 (ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
227 (vec [nil nil nil nil nil nil nil nil nil
])
229 (while (= (length (setq result
(ccl-execute-on-string ccl vec str t
))) 0)
230 (dotimes (i 9) (aset vec i nil
))
231 (setq str
(format "%s%c" str
(read-char-exclusive))))
232 (setq unread-command-events
233 (append result unread-command-events
))))
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.
240 ((eq encoded-kbd-coding
'sjis
)
243 (define-key encoded-kbd-mode-map
244 (vector i
) 'encoded-kbd-self-insert-sjis
)
247 ((eq encoded-kbd-coding
'big5
)
250 (define-key encoded-kbd-mode-map
251 (vector i
) 'encoded-kbd-self-insert-big5
)
254 ((eq encoded-kbd-coding
'iso2022-7
)
255 (define-key encoded-kbd-mode-map
"\e" 'encoded-kbd-iso2022-esc-prefix
))
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
)
264 (define-key encoded-kbd-mode-map
265 (vector i
) 'encoded-kbd-self-insert-iso2022-8bit
)
268 ((eq encoded-kbd-coding
'ccl
)
269 (let ((valid-codes (or (coding-system-get coding
'valid-codes
)
273 (setq elt
(car valid-codes
) valid-codes
(cdr valid-codes
))
275 (setq from
(car elt
) to
(cdr elt
))
276 (setq from
(setq to elt
)))
279 (define-key encoded-kbd-mode-map
280 (vector from
) 'encoded-kbd-self-insert-ccl
))
281 (setq from
(1+ from
))))))
284 (error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding
))))
287 ;; Input mode at the time Encoded-kbd mode is turned on is saved here.
288 (defvar saved-input-mode nil
)
290 (put 'encoded-kbd-mode
'permanent-local t
)
292 (define-minor-mode encoded-kbd-mode
293 "Toggle Encoded-kbd minor mode.
294 With arg, turn Encoded-kbd mode on if and only if arg is positive.
296 You should not turn this mode on manually, instead use the command
297 \\[set-keyboard-coding-system] which turns on or off this mode
300 In Encoded-kbd mode, a text sent from keyboard is accepted
301 as a multilingual text encoded in a coding system set by
302 \\[set-keyboard-coding-system]."
304 ;; We must at first reset input-mode to the original.
305 (if saved-input-mode
(apply 'set-input-mode saved-input-mode
))
307 (let ((coding (keyboard-coding-system)))
308 (setq saved-input-mode
(current-input-mode))
310 (setq encoded-kbd-mode nil
)
311 (error "No coding system for keyboard input is set"))
313 ((= (coding-system-type coding
) 1) ; SJIS
315 (nth 0 saved-input-mode
) (nth 1 saved-input-mode
)
316 'use-8th-bit
(nth 3 saved-input-mode
))
317 (setq encoded-kbd-coding
'sjis
))
319 ((= (coding-system-type coding
) 2) ; ISO2022
320 (if (aref (coding-system-flags coding
) 7) ; 7-bit only
321 (setq encoded-kbd-coding
'iso2022-7
)
323 (nth 0 saved-input-mode
) (nth 1 saved-input-mode
)
324 'use-8th-bit
(nth 3 saved-input-mode
))
325 (setq encoded-kbd-coding
'iso2022-8
))
326 (setq encoded-kbd-iso2022-designations
(make-vector 4 nil
))
327 (let ((flags (coding-system-flags coding
))
330 (if (charsetp (aref flags i
))
331 (aset encoded-kbd-iso2022-designations i
333 (if (charsetp (car-safe (aref flags i
)))
334 (aset encoded-kbd-iso2022-designations i
335 (car (aref flags i
)))))
337 (setq encoded-kbd-iso2022-invocations
(make-vector 3 nil
))
338 (aset encoded-kbd-iso2022-invocations
0 0)
339 (aset encoded-kbd-iso2022-invocations
1 1))
341 ((= (coding-system-type coding
) 3) ; BIG5
343 (nth 0 saved-input-mode
) (nth 1 saved-input-mode
)
344 'use-8th-bit
(nth 3 saved-input-mode
))
345 (setq encoded-kbd-coding
'big5
))
347 ((= (coding-system-type coding
) 4) ; CCL based coding
349 (nth 0 saved-input-mode
) (nth 1 saved-input-mode
)
350 'use-8th-bit
(nth 3 saved-input-mode
))
351 (setq encoded-kbd-coding
'ccl
))
354 (setq encoded-kbd-mode nil
)
355 (error "Coding-system `%s' is not supported in Encoded-kbd mode"
356 (keyboard-coding-system))))
357 (encoded-kbd-setup-keymap coding
))))
359 (provide 'encoded-kb
)
361 ;;; encoded-kb.el ends here