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1 ;;; iso-acc.el --- minor mode providing electric accent keys
2
3 ;; Copyright (C) 1993, 1994, 1996, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
5
6 ;; Author: Johan Vromans
7 ;; Maintainer: FSF
8 ;; Keywords: i18n
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 3 of the License, or
15 ;; (at your option) 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
23 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
24
25 ;;; Commentary:
26
27 ;; This file has been obsolete since Emacs 22.1.
28
29 ;; Function `iso-accents-mode' activates a minor mode in which
30 ;; typewriter "dead keys" are emulated. The purpose of this emulation
31 ;; is to provide a simple means for inserting accented characters
32 ;; according to the ISO-8859-1...3 character sets.
33 ;;
34 ;; In `iso-accents-mode', pseudo accent characters are used to
35 ;; introduce accented keys. The pseudo-accent characters are:
36 ;;
37 ;; ' (minute) -> actue accent
38 ;; ` (backtick) -> grave accent
39 ;; " (second) -> diaeresis
40 ;; ^ (caret) -> circumflex
41 ;; ~ (tilde) -> tilde over the character
42 ;; / (slash) -> slash through the character.
43 ;; Also: /A is A-with-ring and /E is AE ligature.
44 ;; These two are enabled only if you set iso-accents-enable
45 ;; to include them:
46 ;; . (period) -> dot over the character (some languages only)
47 ;; , (cedilla) -> cedilla under the character (some languages only)
48 ;;
49 ;; The action taken depends on the key that follows the pseudo accent.
50 ;; In general:
51 ;;
52 ;; pseudo-accent + appropriate letter -> accented letter
53 ;; pseudo-accent + space -> pseudo-accent (except comma and period)
54 ;; pseudo-accent + pseudo-accent -> accent (if available)
55 ;; pseudo-accent + other -> pseudo-accent + other
56 ;;
57 ;; If the pseudo-accent is followed by anything else than a
58 ;; self-insert-command, the dead-key code is terminated, the
59 ;; pseudo-accent inserted 'as is' and the bell is rung to signal this.
60 ;;
61 ;; Function `iso-accents-mode' can be used to enable the iso accents
62 ;; minor mode, or disable it.
63
64 ;; If you want only some of these characters to serve as accents,
65 ;; add a language to `iso-languages' which specifies the accent characters
66 ;; that you want, then select the language with `iso-accents-customize'.
67 \f
68 ;;; Code:
69
70 (provide 'iso-acc)
71
72 (defgroup iso-acc nil
73 "Minor mode providing electric accent keys."
74 :prefix "iso-accents-"
75 :group 'i18n)
76
77 (defcustom iso-accents-insert-offset nonascii-insert-offset
78 "*Offset added by ISO Accents mode to character codes 0200 and above."
79 :type 'integer
80 :group 'iso-acc)
81
82 (defvar iso-languages
83 '(("catalan"
84 ;; Note this includes some extra characters used in Spanish,
85 ;; on the idea that someone who uses Catalan is likely to use Spanish
86 ;; as well.
87 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
88 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
89 (?\ . ?'))
90 (?` (?A . ?\300) (?E . ?\310) (?O . ?\322)
91 (?a . ?\340) (?e . ?\350) (?o . ?\362)
92 (?\ . ?`))
93 (?\" (?I . ?\317) (?U . ?\334) (?i . ?\357) (?u . ?\374)
94 (?\ . ?\"))
95 (?~ (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
96 (?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
97 (?\ . ?\~)))
98
99 ("esperanto"
100 (?^ (?H . ?\246) (?J . ?\254) (?h . ?\266) (?j . ?\274) (?C . ?\306)
101 (?G . ?\330) (?S . ?\336) (?c . ?\346) (?g . ?\370) (?s . ?\376)
102 (?^ . ?^) (?\ . ?^))
103 (?~ (?U . ?\335) (?u . ?\375) (?\ . ?~)))
104
105 ("french"
106 (?' (?E . ?\311) (?C . ?\307) (?e . ?\351) (?c . ?\347)
107 (?\ . ?'))
108 (?` (?A . ?\300) (?E . ?\310) (?U . ?\331)
109 (?a . ?\340) (?e . ?\350) (?u . ?\371)
110 (?\ . ?`))
111 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
112 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
113 (?\ . ?^))
114 (?\" (?E . ?\313) (?I . ?\317)
115 (?e . ?\353) (?i . ?\357)
116 (?\ . ?\"))
117 (?~ (?< . ?\253) (?> . ?\273) (?C . ?\307) (?c . ?\347)
118 (?\ . ?~))
119 (?, (?C . ?\307) (?c . ?\347) (?\ . ?\,)))
120
121 ("german"
122 (?\" (?A . ?\304) (?O . ?\326) (?U . ?\334)
123 (?a . ?\344) (?o . ?\366) (?u . ?\374) (?s . ?\337) (?\ . ?\")))
124
125 ("irish"
126 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
127 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
128 (?\ . ?')))
129
130 ("portuguese"
131 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
132 (?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
133 (?u . ?\372) (?c . ?\347)
134 (?\ . ?'))
135 (?` (?A . ?\300) (?a . ?\340)
136 (?\ . ?`))
137 (?^ (?A . ?\302) (?E . ?\312) (?O . ?\324)
138 (?a . ?\342) (?e . ?\352) (?o . ?\364)
139 (?\ . ?^))
140 (?\" (?U . ?\334) (?u . ?\374)
141 (?\ . ?\"))
142 (?~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365)
143 (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
144 (?\ . ?~))
145 (?, (?c . ?\347) (?C . ?\307) (?, . ?,)))
146
147 ("spanish"
148 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
149 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
150 (?\ . ?'))
151 (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\"))
152 (?\~ (?N . ?\321) (?n . ?\361) (?> . ?\273) (?< . ?\253) (?! . ?\241)
153 (?? . ?\277) (?\ . ?\~)))
154
155 ("latin-1"
156 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
157 (?Y . ?\335) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
158 (?u . ?\372) (?y . ?\375) (?' . ?\264)
159 (?\ . ?'))
160 (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
161 (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
162 (?` . ?`) (?\ . ?`))
163 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
164 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
165 (?^ . ?^) (?\ . ?^))
166 (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
167 (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?s . ?\337)
168 (?u . ?\374) (?y . ?\377)
169 (?\" . ?\250) (?\ . ?\"))
170 (?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
171 (?T . ?\336) (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361)
172 (?o . ?\365) (?t . ?\376)
173 (?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
174 (?\~ . ?\270) (?\ . ?~))
175 (?/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
176 (?o . ?\370)
177 (?/ . ?\260) (?\ . ?/)))
178
179 ("latin-2" latin-iso8859-2
180 (?' (?A . ?\301) (?C . ?\306) (?D . ?\320) (?E . ?\311) (?I . ?\315)
181 (?L . ?\305) (?N . ?\321) (?O . ?\323) (?R . ?\300) (?S . ?\246)
182 (?U . ?\332) (?Y . ?\335) (?Z . ?\254)
183 (?a . ?\341) (?c . ?\346) (?d . ?\360) (?e . ?\351) (?i . ?\355)
184 (?l . ?\345) (?n . ?\361) (?o . ?\363) (?r . ?\340) (?s . ?\266)
185 (?u . ?\372) (?y . ?\375) (?z . ?\274)
186 (?' . ?\264) (?\ . ?'))
187 (?` (?A . ?\241) (?C . ?\307) (?E . ?\312) (?L . ?\243) (?S . ?\252)
188 (?T . ?\336) (?Z . ?\257)
189 (?a . ?\261) (?l . ?\263) (?c . ?\347) (?e . ?\352) (?s . ?\272)
190 (?t . ?\376) (?z . ?\277)
191 (?` . ?\252)
192 (?. . ?\377) (?\ . ?`))
193 (?^ (?A . ?\302) (?I . ?\316) (?O . ?\324)
194 (?a . ?\342) (?i . ?\356) (?o . ?\364)
195 (?^ . ?^) ; no special code?
196 (?\ . ?^))
197 (?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334)
198 (?a . ?\344) (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374)
199 (?\" . ?\250)
200 (?\ . ?\"))
201 (?~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
202 (?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
203 (?Z . ?\256)
204 (?a . ?\343) (?c . ?\350) (?d . ?\357) (?l . ?\265) (?n . ?\362)
205 (?o . ?\365) (?r . ?\370) (?s . ?\271) (?t . ?\273) (?u . ?\373)
206 (?z . ?\276)
207 (?v . ?\242) ; v accent
208 (?\~ . ?\242) ; v accent
209 (?\. . ?\270) ; cedilla accent
210 (?\ . ?~)))
211
212 ("latin-3" latin-iso8859-3
213 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
214 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
215 (?' . ?\264) (?\ . ?'))
216 (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
217 (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
218 (?` . ?`) (?\ . ?`))
219 (?^ (?A . ?\302) (?C . ?\306) (?E . ?\312) (?G . ?\330) (?H . ?\246)
220 (?I . ?\316) (?J . ?\254) (?O . ?\324) (?S . ?\336) (?U . ?\333)
221 (?a . ?\342) (?c . ?\346) (?e . ?\352) (?g . ?\370) (?h . ?\266)
222 (?i . ?\356) (?j . ?\274) (?o . ?\364) (?s . ?\376) (?u . ?\373)
223 (?^ . ?^) (?\ . ?^))
224 (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
225 (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?u . ?\374)
226 (?s . ?\337)
227 (?\" . ?\250) (?\ . ?\"))
228 (?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
229 (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361) (?o . ?\365)
230 (?$ . ?\245) (?S . ?\252) (?s . ?\272) (?G . ?\253) (?g . ?\273)
231 (?U . ?\335) (?u . ?\375) (?` . ?\242)
232 (?~ . ?\270) (?\ . ?~))
233 (?/ (?C . ?\305) (?G . ?\325) (?H . ?\241) (?I . ?\251) (?Z . ?\257)
234 (?c . ?\345) (?g . ?\365) (?h . ?\261) (?i . ?\271) (?z . ?\277)
235 (?r . ?\256)
236 (?. . ?\377) (?# . ?\243) (?$ . ?\244)
237 (?/ . ?\260) (?\ . ?/))
238 (?. (?C . ?\305) (?G . ?\325) (?I . ?\251) (?Z . ?\257)
239 (?c . ?\345) (?g . ?\365) (?z . ?\277))))
240 "List of language-specific customizations for the ISO Accents mode.
241
242 Each element of the list is of the form
243
244 (LANGUAGE [CHARSET]
245 (PSEUDO-ACCENT MAPPINGS)
246 (PSEUDO-ACCENT MAPPINGS)
247 ...)
248
249 LANGUAGE is a string naming the language.
250 CHARSET (which may be omitted) is the symbol name
251 of the character set used in this language.
252 If CHARSET is omitted, latin-iso8859-1 is the default.
253 PSEUDO-ACCENT is a char specifying an accent key.
254 MAPPINGS are cons cells of the form (CHAR . ISO-CHAR).
255
256 The net effect is that the key sequence PSEUDO-ACCENT CHAR is mapped
257 to ISO-CHAR on input.")
258
259 (defvar iso-language nil
260 "Language for which ISO Accents mode is currently customized.
261 Change it with the `iso-accents-customize' function.")
262
263 (defvar iso-accents-list nil
264 "Association list for ISO accent combinations, for the chosen language.")
265
266 (defcustom iso-accents-mode nil
267 "*Non-nil enables ISO Accents mode.
268 Setting this variable makes it local to the current buffer.
269 See the function `iso-accents-mode'."
270 :type 'boolean
271 :group 'iso-acc)
272 (make-variable-buffer-local 'iso-accents-mode)
273
274 (defcustom iso-accents-enable '(?' ?` ?^ ?\" ?~ ?/)
275 "*List of accent keys that become prefixes in ISO Accents mode.
276 The default is (?' ?` ?^ ?\" ?~ ?/), which contains all the supported
277 accent keys. If you set this variable to a list in which some of those
278 characters are missing, the missing ones do not act as accents.
279
280 Note that if you specify a language with `iso-accents-customize',
281 that can also turn off certain prefixes (whichever ones are not needed in
282 the language you choose)."
283 :type '(repeat character)
284 :group 'iso-acc)
285
286 (defun iso-accents-accent-key (prompt)
287 "Modify the following character by adding an accent to it."
288 ;; Pick up the accent character.
289 (if (and iso-accents-mode
290 (memq last-input-event iso-accents-enable))
291 (iso-accents-compose prompt)
292 (vector last-input-event)))
293
294
295 ;; The iso-accents-compose function is called deep inside Emacs' read
296 ;; key sequence machinery, so the call to read-event below actually
297 ;; recurses into that machinery. Doing that does not cause any
298 ;; problem on its own, but read-event will have marked the window's
299 ;; display matrix to be accurate -- which is broken by the subsequent
300 ;; call to delete-region. Therefore, we must call force-window-update
301 ;; after delete-region to explicitly clear the accurate state of the
302 ;; window's display matrix.
303
304 (defun iso-accents-compose (prompt)
305 (let* ((first-char last-input-event)
306 (list (assq first-char iso-accents-list))
307 ;; Wait for the second key and look up the combination.
308 (second-char (if (or prompt
309 (not (eq (key-binding "a")
310 'self-insert-command))
311 ;; Not at start of a key sequence.
312 (> (length (this-single-command-keys)) 1)
313 ;; Called from anything but the command loop.
314 this-command)
315 (progn
316 (message "%s%c"
317 (or prompt "Compose with ")
318 first-char)
319 (read-event))
320 (insert first-char)
321 (prog1 (read-event)
322 (delete-region (1- (point)) (point))
323 ;; Display is no longer up-to-date.
324 (force-window-update (selected-window)))))
325 (entry (cdr (assq second-char list))))
326 (if entry
327 ;; Found it: return the mapped char
328 (vector
329 (if (and enable-multibyte-characters
330 (>= entry ?\200))
331 (+ iso-accents-insert-offset entry)
332 entry))
333 ;; Otherwise, advance and schedule the second key for execution.
334 (push second-char unread-command-events)
335 (vector first-char))))
336
337 ;; It is a matter of taste if you want the minor mode indicated
338 ;; in the mode line...
339 ;; If so, uncomment the next four lines.
340 ;; (or (assq 'iso-accents-mode minor-mode-alist)
341 ;; (setq minor-mode-alist
342 ;; (append minor-mode-alist
343 ;; '((iso-accents-mode " ISO-Acc")))))
344
345 ;;;###autoload
346 (defun iso-accents-mode (&optional arg)
347 "Toggle ISO Accents mode, in which accents modify the following letter.
348 This permits easy insertion of accented characters according to ISO-8859-1.
349 When Iso-accents mode is enabled, accent character keys
350 \(`, ', \", ^, / and ~) do not self-insert; instead, they modify the following
351 letter key so that it inserts an ISO accented letter.
352
353 You can customize ISO Accents mode to a particular language
354 with the command `iso-accents-customize'.
355
356 Special combinations: ~c gives a c with cedilla,
357 ~d gives an Icelandic eth (d with dash).
358 ~t gives an Icelandic thorn.
359 \"s gives German sharp s.
360 /a gives a with ring.
361 /e gives an a-e ligature.
362 ~< and ~> give guillemots.
363 ~! gives an inverted exclamation mark.
364 ~? gives an inverted question mark.
365
366 With an argument, a positive argument enables ISO Accents mode,
367 and a negative argument disables it."
368
369 (interactive "P")
370
371 (if (if arg
372 ;; Negative arg means switch it off.
373 (<= (prefix-numeric-value arg) 0)
374 ;; No arg means toggle.
375 iso-accents-mode)
376 (setq iso-accents-mode nil)
377
378 ;; Enable electric accents.
379 (setq iso-accents-mode t)))
380
381 (defun iso-accents-customize (language)
382 "Customize the ISO accents machinery for a particular language.
383 It selects the customization based on the specifications in the
384 `iso-languages' variable."
385 (interactive (list (completing-read "Language: " iso-languages nil t)))
386 (let ((table (cdr (assoc language iso-languages)))
387 all-accents tail)
388 (if (not table)
389 (error "Unknown language `%s'" language)
390 (setq iso-accents-insert-offset (- (make-char (if (symbolp (car table))
391 (car table)
392 'latin-iso8859-1))
393 128))
394 (if (symbolp (car table))
395 (setq table (cdr table)))
396 (setq iso-language language
397 iso-accents-list table)
398 (if key-translation-map
399 (substitute-key-definition
400 'iso-accents-accent-key nil key-translation-map)
401 (setq key-translation-map (make-sparse-keymap)))
402 ;; Set up translations for all the characters that are used as
403 ;; accent prefixes in this language.
404 (setq tail iso-accents-list)
405 (while tail
406 (define-key key-translation-map (vector (car (car tail)))
407 'iso-accents-accent-key)
408 (setq tail (cdr tail))))))
409
410 (defun iso-accentuate (start end)
411 "Convert two-character sequences in region into accented characters.
412 Noninteractively, this operates on text from START to END.
413 This uses the same conversion that ISO Accents mode uses for type-in."
414 (interactive "r")
415 (save-excursion
416 (save-restriction
417 (narrow-to-region start end)
418 (goto-char start)
419 (forward-char 1)
420 (let (entry)
421 (while (< (point) end)
422 (if (and (memq (preceding-char) iso-accents-enable)
423 (setq entry (cdr (assq (following-char) (assq (preceding-char) iso-accents-list)))))
424 (progn
425 (forward-char -1)
426 (delete-char 2)
427 (insert entry)
428 (setq end (1- end)))
429 (forward-char 1)))))))
430
431 (defun iso-accent-rassoc-unit (value alist)
432 (let (elt acc)
433 (while (and alist (not elt))
434 (setq acc (car (car alist))
435 elt (car (rassq value (cdr (car alist))))
436 alist (cdr alist)))
437 (if elt
438 (cons acc elt))))
439
440 (defun iso-unaccentuate (start end)
441 "Convert accented characters in the region into two-character sequences.
442 Noninteractively, this operates on text from START to END.
443 This uses the opposite of the conversion done by ISO Accents mode for type-in."
444 (interactive "r")
445 (save-excursion
446 (save-restriction
447 (narrow-to-region start end)
448 (goto-char start)
449 (let (entry)
450 (while (< (point) end)
451 (if (and (> (following-char) 127)
452 (setq entry (iso-accent-rassoc-unit (following-char)
453 iso-accents-list)))
454 (progn
455 (delete-char 1)
456 (insert (car entry) (cdr entry))
457 (setq end (1+ end)))
458 (forward-char 1)))))))
459
460 (defun iso-deaccentuate (start end)
461 "Convert accented characters in the region into unaccented characters.
462 Noninteractively, this operates on text from START to END."
463 (interactive "r")
464 (save-excursion
465 (save-restriction
466 (narrow-to-region start end)
467 (goto-char start)
468 (let (entry)
469 (while (< (point) end)
470 (if (and (> (following-char) 127)
471 (setq entry (iso-accent-rassoc-unit (following-char)
472 iso-accents-list)))
473 (progn
474 (delete-char 1)
475 (insert (cdr entry)))
476 (forward-char 1)))))))
477
478 ;; Set up the default settings.
479 (iso-accents-customize "latin-1")
480
481 ;; Use Iso-Accents mode in the minibuffer
482 ;; if it was in use in the previous buffer.
483 (defun iso-acc-minibuf-setup ()
484 (setq iso-accents-mode
485 (with-current-buffer (window-buffer minibuffer-scroll-window)
486 iso-accents-mode)))
487
488 (add-hook 'minibuffer-setup-hook 'iso-acc-minibuf-setup)
489
490 ;;; iso-acc.el ends here