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 ;; Usually this map is empty (even if Encoded-kbd mode is on), but if
28 ;; the keyboard coding system is iso-2022-based, it defines dummy key
29 ;; bindings for ESC $ ..., etc. so that those bindings in
30 ;; key-translation-map take effect.
31 (defconst encoded-kbd-mode-map
(make-sparse-keymap)
32 "Keymap for Encoded-kbd minor mode.")
34 ;; Subsidiary keymaps for handling ISO2022 escape sequences.
36 (defvar encoded-kbd-iso2022-esc-map
37 (let ((map (make-sparse-keymap)))
38 (define-key map
"$" 'encoded-kbd-iso2022-esc-dollar-prefix
)
39 (define-key map
"(" 'encoded-kbd-iso2022-designation-prefix
)
40 (define-key map
")" 'encoded-kbd-iso2022-designation-prefix
)
41 (define-key map
"," 'encoded-kbd-iso2022-designation-prefix
)
42 (define-key map
"-" 'encoded-kbd-iso2022-designation-prefix
)
44 "Keymap for handling ESC code in Encoded-kbd mode.")
45 (fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map
)
47 (defvar encoded-kbd-iso2022-esc-dollar-map
48 (let ((map (make-sparse-keymap)))
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
)
53 (define-key map
"@" 'encoded-kbd-iso2022-designation
)
54 (define-key map
"A" 'encoded-kbd-iso2022-designation
)
55 (define-key map
"B" 'encoded-kbd-iso2022-designation
)
57 "Keymap for handling ESC $ sequence in Encoded-kbd mode.")
58 (fset 'encoded-kbd-iso2022-esc-dollar-prefix
59 encoded-kbd-iso2022-esc-dollar-map
)
61 (defvar encoded-kbd-iso2022-designation-map
62 (let ((map (make-sparse-keymap))
66 (setq final-char
(charset-iso-final-char (car l
)))
68 (define-key map
(char-to-string final-char
)
69 'encoded-kbd-iso2022-designation
))
72 "Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
73 (fset 'encoded-kbd-iso2022-designation-prefix
74 encoded-kbd-iso2022-designation-map
)
76 ;; Keep information of designation state of ISO2022 encoding. When
77 ;; Encoded-kbd mode is on, this is set to a vector of length 4, the
78 ;; elements are character sets currently designated to graphic
79 ;; registers 0 thru 3.
81 (defvar encoded-kbd-iso2022-designations nil
)
82 (put 'encoded-kbd-iso2022-designations
'permanent-local t
)
84 ;; Keep information of invocation state of ISO2022 encoding. When
85 ;; Encoded-kbd mode is on, this is set to a vector of length 3,
86 ;; graphic register numbers currently invoked to graphic plane 1 and
87 ;; 2, and a single shifted graphic register number.
89 (defvar encoded-kbd-iso2022-invocations nil
)
90 (put 'encoded-kbd-iso2022-invocations
'permanent-local t
)
92 (defsubst encoded-kbd-last-key
()
93 (let ((keys (this-single-command-keys)))
94 (aref keys
(1- (length keys
)))))
96 (defun encoded-kbd-iso2022-designation (ignore)
97 "Do ISO2022 designation according to the current key in Encoded-kbd mode.
98 The following key sequence may cause multilingual text insertion."
99 (let ((key-seq (this-single-command-keys))
100 (prev-g0-charset (aref encoded-kbd-iso2022-designations
101 (aref encoded-kbd-iso2022-invocations
0)))
102 intermediate-char final-char
103 reg dimension chars charset
)
104 (if (= (length key-seq
) 4)
105 ;; ESC $ <intermediate-char> <final-char>
106 (setq intermediate-char
(aref key-seq
2)
108 chars
(if (< intermediate-char ?
,) 94 96)
109 final-char
(aref key-seq
3)
110 reg
(mod intermediate-char
4))
111 (if (= (aref key-seq
1) ?$
)
112 ;; ESC $ <final-char>
115 final-char
(aref key-seq
2)
117 ;; ESC <intermediate-char> <final-char>
118 (setq intermediate-char
(aref key-seq
1)
120 chars
(if (< intermediate-char ?
,) 94 96)
121 final-char
(aref key-seq
2)
122 reg
(mod intermediate-char
4))))
123 (aset encoded-kbd-iso2022-designations reg
124 (iso-charset dimension chars final-char
)))
127 (defun encoded-kbd-iso2022-single-shift (ignore)
128 (let ((char (encoded-kbd-last-key)))
129 (aset encoded-kbd-iso2022-invocations
2 (if (= char ?
\216) 2 3)))
132 (defun encoded-kbd-self-insert-iso2022-7bit (ignore)
133 (let ((char (encoded-kbd-last-key))
134 (charset (aref encoded-kbd-iso2022-designations
135 (or (aref encoded-kbd-iso2022-invocations
2)
136 (aref encoded-kbd-iso2022-invocations
0)))))
137 (aset encoded-kbd-iso2022-invocations
2 nil
)
138 (vector (if (= (charset-dimension charset
) 1)
139 (make-char charset char
)
140 (make-char charset char
(read-char-exclusive))))))
142 (defun encoded-kbd-self-insert-iso2022-8bit (ignore)
143 (let ((char (encoded-kbd-last-key))
144 (charset (aref encoded-kbd-iso2022-designations
145 (or (aref encoded-kbd-iso2022-invocations
2)
146 (aref encoded-kbd-iso2022-invocations
1)))))
147 (aset encoded-kbd-iso2022-invocations
2 nil
)
148 (vector (if (= (charset-dimension charset
) 1)
149 (make-char charset char
)
150 (make-char charset char
(read-char-exclusive))))))
152 (defun encoded-kbd-self-insert-sjis (ignore)
153 (let ((char (encoded-kbd-last-key)))
155 (if (or (< char ?
\xA0) (>= char ?
\xE0))
156 (decode-sjis-char (+ (ash char
8) (read-char-exclusive)))
157 (make-char 'katakana-jisx0201 char
)))))
159 (defun encoded-kbd-self-insert-big5 (ignore)
160 (let ((char (encoded-kbd-last-key)))
162 (decode-big5-char (+ (ash char
8) (read-char-exclusive))))))
164 (defun encoded-kbd-self-insert-ccl (ignore)
165 (let ((str (char-to-string (encoded-kbd-last-key)))
166 (ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
167 (vec [nil nil nil nil nil nil nil nil nil
])
169 (while (= (length (setq result
(ccl-execute-on-string ccl vec str t
))) 0)
170 (dotimes (i 9) (aset vec i nil
))
171 (setq str
(format "%s%c" str
(read-char-exclusive))))
172 (vector (aref result
0))))
174 (defun encoded-kbd-setup-keymap (coding)
175 ;; At first, reset the keymap.
176 (define-key encoded-kbd-mode-map
"\e" nil
)
177 ;; Then setup the keymap according to the keyboard coding system.
179 ((eq (coding-system-type coding
) 1) ; SJIS
182 (define-key key-translation-map
183 (vector i
) 'encoded-kbd-self-insert-sjis
)
187 ((eq (coding-system-type coding
) 3) ; Big5
190 (define-key key-translation-map
191 (vector i
) 'encoded-kbd-self-insert-big5
)
195 ((eq (coding-system-type coding
) 2) ; ISO-2022
196 (let ((flags (coding-system-flags coding
))
199 nil
; Don't support locking-shift.
200 (setq encoded-kbd-iso2022-designations
(make-vector 4 nil
)
201 encoded-kbd-iso2022-invocations
(make-vector 3 nil
))
204 (if (charsetp (aref flags i
))
205 (aset encoded-kbd-iso2022-designations
207 (setq use-designation t
)
208 (if (charsetp (car-safe (aref flags i
)))
209 (aset encoded-kbd-iso2022-designations
210 i
(car (aref flags i
)))))))
211 (aset encoded-kbd-iso2022-invocations
0 0)
212 (if (aref encoded-kbd-iso2022-designations
1)
213 (aset encoded-kbd-iso2022-invocations
1 1))
214 (when use-designation
215 (define-key encoded-kbd-mode-map
"\e" 'encoded-kbd-iso2022-esc-prefix
)
216 (define-key key-translation-map
"\e" 'encoded-kbd-iso2022-esc-prefix
))
217 (when (or (aref flags
2) (aref flags
3))
218 (define-key key-translation-map
219 [?
\216] 'encoded-kbd-iso2022-single-shift
)
220 (define-key key-translation-map
221 [?
\217] 'encoded-kbd-iso2022-single-shift
))
222 (or (eq (aref flags
0) 'ascii
)
224 (define-key key-translation-map
225 (vector (+ 32 i
)) 'encoded-kbd-self-insert-iso2022-7bit
)))
229 (define-key key-translation-map
230 (vector (+ 160 i
)) 'encoded-kbd-self-insert-iso2022-8bit
))
233 ((eq (coding-system-type coding
) 4) ; CCL-base
234 (let ((valid-codes (or (coding-system-get coding
'valid-codes
)
238 (setq elt
(car valid-codes
) valid-codes
(cdr valid-codes
))
240 (setq from
(car elt
) to
(cdr elt
))
241 (setq from
(setq to elt
)))
244 (define-key key-translation-map
245 (vector from
) 'encoded-kbd-self-insert-ccl
))
246 (setq from
(1+ from
))))
252 ;; key-translation-map at the time Encoded-kbd mode is turned on is
254 (defvar saved-key-translation-map nil
)
256 ;; Input mode at the time Encoded-kbd mode is turned on is saved here.
257 (defvar saved-input-mode nil
)
259 (put 'encoded-kbd-mode
'permanent-local t
)
261 (define-minor-mode encoded-kbd-mode
262 "Toggle Encoded-kbd minor mode.
263 With arg, turn Encoded-kbd mode on if and only if arg is positive.
265 You should not turn this mode on manually, instead use the command
266 \\[set-keyboard-coding-system] which turns on or off this mode
269 In Encoded-kbd mode, a text sent from keyboard is accepted
270 as a multilingual text encoded in a coding system set by
271 \\[set-keyboard-coding-system]."
275 ;; We are turning on Encoded-kbd mode.
276 (let ((coding (keyboard-coding-system))
278 (or saved-key-translation-map
279 (if (keymapp key-translation-map
)
280 (setq saved-key-translation-map
281 (copy-keymap key-translation-map
))
282 (setq key-translation-map
(make-sparse-keymap))))
284 (setq saved-input-mode
285 (current-input-mode)))
286 (setq result
(and coding
(encoded-kbd-setup-keymap coding
)))
290 (nth 0 saved-input-mode
)
291 (nth 1 saved-input-mode
)
293 (nth 3 saved-input-mode
)))
294 (setq encoded-kbd-mode nil
295 saved-key-translation-map nil
296 saved-input-mode nil
)
297 (error "Unsupported coding system in Encoded-kbd mode: %S"
300 ;; We are turning off Encoded-kbd mode.
301 (setq key-translation-map saved-key-translation-map
302 saved-key-translation-map nil
)
303 (apply 'set-input-mode saved-input-mode
)
304 (setq saved-input-mode nil
)))
306 (provide 'encoded-kb
)
308 ;;; arch-tag: 76f0f9b3-65e7-45c3-b692-59509a87ad44
309 ;;; encoded-kb.el ends here