1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
;;; 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.
(defvar encoded-kbd-mode nil
"Non-nil if in Encoded-kbd minor mode.")
(put 'encoded-kbd-mode 'permanent-local t)
(let ((slot (assq 'encoded-kbd-mode minor-mode-alist))
(name " Encoded-kbd"))
(if slot
(setcar (cdr slot) name)
(setq minor-mode-alist
(cons '(encoded-kbd-mode " Encoded-kbd") minor-mode-alist))))
(defconst encoded-kbd-mode-map (make-sparse-keymap)
"Keymap for Encoded-kbd minor mode.")
(let ((slot (assq 'encoded-kbd-mode minor-mode-map-alist)))
(if slot
(setcdr slot encoded-kbd-mode-map)
(setq minor-mode-map-alist
(cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
minor-mode-map-alist))))
;; 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))
(while l
(define-key map
(char-to-string (charset-iso-final-char (car l)))
'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))
(coding (keyboard-coding-system)))
(setq str (decode-coding-string str coding))
(setq unread-command-events
(append (string-to-list str) 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)
;;;###autoload
(defun encoded-kbd-mode (&optional arg)
"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]."
(if encoded-kbd-mode
;; We must at first reset input-mode to the original.
(apply 'set-input-mode saved-input-mode))
(setq encoded-kbd-mode
(if (null arg) (null encoded-kbd-mode)
(> (prefix-numeric-value arg) 0)))
(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)
(run-hooks 'encoded-kbd-mode-hook))))
;;; encoded-kb.el ends here
|
