1 ;;; iso-acc.el --- minor mode providing electric accent keys
3 ;; Copyright (C) 1993, 1994, 1996, 2001 Free Software Foundation, Inc.
5 ;; Author: Johan Vromans
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; Function `iso-accents-mode' activates a minor mode in which
29 ;; typewriter "dead keys" are emulated. The purpose of this emulation
30 ;; is to provide a simple means for inserting accented characters
31 ;; according to the ISO-8859-1...3 character sets.
33 ;; In `iso-accents-mode', pseudo accent characters are used to
34 ;; introduce accented keys. The pseudo-accent characters are:
36 ;; ' (minute) -> grave accent
37 ;; ` (backtick) -> acute accent
38 ;; " (second) -> diaeresis
39 ;; ^ (caret) -> circumflex
40 ;; ~ (tilde) -> tilde over the character
41 ;; / (slash) -> slash through the character.
42 ;; Also: /A is A-with-ring and /E is AE ligature.
43 ;; These two are enabled only if you set iso-accents-enable
45 ;; . (period) -> dot over the character (some languages only)
46 ;; , (cedilla) -> cedilla under the character (some languages only)
48 ;; The action taken depends on the key that follows the pseudo accent.
51 ;; pseudo-accent + appropriate letter -> accented letter
52 ;; pseudo-accent + space -> pseudo-accent (except comma and period)
53 ;; pseudo-accent + pseudo-accent -> accent (if available)
54 ;; pseudo-accent + other -> pseudo-accent + other
56 ;; If the pseudo-accent is followed by anything else than a
57 ;; self-insert-command, the dead-key code is terminated, the
58 ;; pseudo-accent inserted 'as is' and the bell is rung to signal this.
60 ;; Function `iso-accents-mode' can be used to enable the iso accents
61 ;; minor mode, or disable it.
63 ;; If you want only some of these characters to serve as accents,
64 ;; add a language to `iso-languages' which specifies the accent characters
65 ;; that you want, then select the language with `iso-accents-customize'.
72 "Minor mode providing electric accent keys."
73 :prefix "iso-accents-"
76 (defcustom iso-accents-insert-offset nonascii-insert-offset
77 "*Offset added by ISO Accents mode to character codes 0200 and above."
83 ;; Note this includes some extra characters used in Spanish,
84 ;; on the idea that someone who uses Catalan is likely to use Spanish
86 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
87 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
89 (?` (?A . ?\300) (?E . ?\310) (?O . ?\322)
90 (?a . ?\340) (?e . ?\350) (?o . ?\362)
92 (?\" (?I . ?\317) (?U . ?\334) (?i . ?\357) (?u . ?\374)
94 (?~ (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
95 (?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
99 (?^ (?H . ?\246) (?J . ?\254) (?h . ?\266) (?j . ?\274) (?C . ?\306)
100 (?G . ?\330) (?S . ?\336) (?c . ?\346) (?g . ?\370) (?s . ?\376)
102 (?~ (?U . ?\335) (?u . ?\375) (?\ . ?~)))
105 (?' (?E . ?\311) (?C . ?\307) (?e . ?\351) (?c . ?\347)
107 (?` (?A . ?\300) (?E . ?\310) (?U . ?\331)
108 (?a . ?\340) (?e . ?\350) (?u . ?\371)
110 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
111 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
113 (?\" (?E . ?\313) (?I . ?\317)
114 (?e . ?\353) (?i . ?\357)
116 (?~ (?< . ?\253) (?> . ?\273) (?C . ?\307) (?c . ?\347)
118 (?, (?C . ?\307) (?c . ?\347) (?\ . ?\~)))
121 (?\" (?A . ?\304) (?O . ?\326) (?U . ?\334)
122 (?a . ?\344) (?o . ?\366) (?u . ?\374) (?s . ?\337) (?\ . ?\")))
125 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
126 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
130 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
131 (?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
132 (?u . ?\372) (?c . ?\347)
134 (?` (?A . ?\300) (?a . ?\340)
136 (?^ (?A . ?\302) (?E . ?\312) (?O . ?\324)
137 (?a . ?\342) (?e . ?\352) (?o . ?\364)
139 (?\" (?U . ?\334) (?u . ?\374)
141 (?~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365)
142 (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
144 (?, (?c . ?\347) (?C . ?\307) (?, . ?,)))
147 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
148 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
150 (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\"))
151 (?\~ (?N . ?\321) (?n . ?\361) (?> . ?\273) (?< . ?\253) (?! . ?\241)
152 (?? . ?\277) (?\ . ?\~)))
155 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
156 (?Y . ?\335) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
157 (?u . ?\372) (?y . ?\375) (?' . ?\264)
159 (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
160 (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
162 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
163 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
165 (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
166 (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?s . ?\337)
167 (?u . ?\374) (?y . ?\377)
168 (?\" . ?\250) (?\ . ?\"))
169 (?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
170 (?T . ?\336) (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361)
171 (?o . ?\365) (?t . ?\376)
172 (?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
173 (?\~ . ?\270) (?\ . ?~))
174 (?/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
176 (?/ . ?\260) (?\ . ?/)))
178 ("latin-2" latin-iso8859-2
179 (?' (?A . ?\301) (?C . ?\306) (?D . ?\320) (?E . ?\311) (?I . ?\315)
180 (?L . ?\305) (?N . ?\321) (?O . ?\323) (?R . ?\300) (?S . ?\246)
181 (?U . ?\332) (?Y . ?\335) (?Z . ?\254)
182 (?a . ?\341) (?c . ?\346) (?d . ?\360) (?e . ?\351) (?i . ?\355)
183 (?l . ?\345) (?n . ?\361) (?o . ?\363) (?r . ?\340) (?s . ?\266)
184 (?u . ?\372) (?y . ?\375) (?z . ?\274)
185 (?' . ?\264) (?\ . ?'))
186 (?` (?A . ?\241) (?C . ?\307) (?E . ?\312) (?L . ?\243) (?S . ?\252)
187 (?T . ?\336) (?Z . ?\257)
188 (?a . ?\261) (?l . ?\263) (?c . ?\347) (?e . ?\352) (?s . ?\272)
189 (?t . ?\376) (?z . ?\277)
191 (?. . ?\377) (?\ . ?`))
192 (?^ (?A . ?\302) (?I . ?\316) (?O . ?\324)
193 (?a . ?\342) (?i . ?\356) (?o . ?\364)
194 (?^ . ?^) ; no special code?
196 (?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334)
197 (?a . ?\344) (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374)
200 (?~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
201 (?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
203 (?a . ?\343) (?c . ?\350) (?d . ?\357) (?l . ?\265) (?n . ?\362)
204 (?o . ?\365) (?r . ?\370) (?s . ?\271) (?t . ?\273) (?u . ?\373)
206 (?v . ?\242) ; v accent
207 (?\~ . ?\242) ; v accent
208 (?\. . ?\270) ; cedilla accent
211 ("latin-3" latin-iso8859-3
212 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
213 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
214 (?' . ?\264) (?\ . ?'))
215 (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
216 (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
218 (?^ (?A . ?\302) (?C . ?\306) (?E . ?\312) (?G . ?\330) (?H . ?\246)
219 (?I . ?\316) (?J . ?\254) (?O . ?\324) (?S . ?\336) (?U . ?\333)
220 (?a . ?\342) (?c . ?\346) (?e . ?\352) (?g . ?\370) (?h . ?\266)
221 (?i . ?\356) (?j . ?\274) (?o . ?\364) (?s . ?\376) (?u . ?\373)
223 (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
224 (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?u . ?\374)
226 (?\" . ?\250) (?\ . ?\"))
227 (?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
228 (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361) (?o . ?\365)
229 (?$ . ?\245) (?S . ?\252) (?s . ?\272) (?G . ?\253) (?g . ?\273)
230 (?U . ?\335) (?u . ?\375) (?` . ?\242)
231 (?~ . ?\270) (?\ . ?~))
232 (?/ (?C . ?\305) (?G . ?\325) (?H . ?\241) (?I . ?\251) (?Z . ?\257)
233 (?c . ?\345) (?g . ?\365) (?h . ?\261) (?i . ?\271) (?z . ?\277)
235 (?. . ?\377) (?# . ?\243) (?$ . ?\244)
236 (?/ . ?\260) (?\ . ?/))
237 (?. (?C . ?\305) (?G . ?\325) (?I . ?\251) (?Z . ?\257)
238 (?c . ?\345) (?g . ?\365) (?z . ?\277))))
239 "List of language-specific customizations for the ISO Accents mode.
241 Each element of the list is of the form
244 (PSEUDO-ACCENT MAPPINGS)
245 (PSEUDO-ACCENT MAPPINGS)
248 LANGUAGE is a string naming the language.
249 CHARSET (which may be omitted) is the symbol name
250 of the character set used in this language.
251 If CHARSET is omitted, latin-iso8859-1 is the default.
252 PSEUDO-ACCENT is a char specifying an accent key.
253 MAPPINGS are cons cells of the form (CHAR . ISO-CHAR).
255 The net effect is that the key sequence PSEUDO-ACCENT CHAR is mapped
256 to ISO-CHAR on input.")
258 (defvar iso-language nil
259 "Language for which ISO Accents mode is currently customized.
260 Change it with the `iso-accents-customize' function.")
262 (defvar iso-accents-list nil
263 "Association list for ISO accent combinations, for the chosen language.")
265 (defcustom iso-accents-mode nil
266 "*Non-nil enables ISO Accents mode.
267 Setting this variable makes it local to the current buffer.
268 See the function `iso-accents-mode'."
271 (make-variable-buffer-local 'iso-accents-mode)
273 (defcustom iso-accents-enable '(?' ?` ?^ ?\" ?~ ?/)
274 "*List of accent keys that become prefixes in ISO Accents mode.
275 The default is (?' ?` ?^ ?\" ?~ ?/), which contains all the supported
276 accent keys. If you set this variable to a list in which some of those
277 characters are missing, the missing ones do not act as accents.
279 Note that if you specify a language with `iso-accents-customize',
280 that can also turn off certain prefixes (whichever ones are not needed in
281 the language you choose)."
282 :type '(repeat character)
285 (defun iso-accents-accent-key (prompt)
286 "Modify the following character by adding an accent to it."
287 ;; Pick up the accent character.
288 (if (and iso-accents-mode
289 (memq last-input-char iso-accents-enable))
290 (iso-accents-compose prompt)
291 (char-to-string last-input-char)))
293 (defun iso-accents-compose (prompt)
294 (let* ((first-char last-input-char)
295 (list (assq first-char iso-accents-list))
296 ;; Wait for the second key and look up the combination.
297 (second-char (if (or prompt
298 (not (eq (key-binding "a")
299 'self-insert-command))
300 ;; Not at start of a key sequence.
301 (> (length (this-single-command-keys)) 1)
302 ;; Called from anything but the command loop.
306 (or prompt "Compose with ")
311 (delete-region (1- (point)) (point)))))
312 (entry (cdr (assq second-char list))))
314 ;; Found it: return the mapped char
316 (if (and enable-multibyte-characters
318 (+ iso-accents-insert-offset entry)
320 ;; Otherwise, advance and schedule the second key for execution.
321 (push second-char unread-command-events)
322 (vector first-char))))
324 ;; It is a matter of taste if you want the minor mode indicated
325 ;; in the mode line...
326 ;; If so, uncomment the next four lines.
327 ;; (or (assq 'iso-accents-mode minor-mode-alist)
328 ;; (setq minor-mode-alist
329 ;; (append minor-mode-alist
330 ;; '((iso-accents-mode " ISO-Acc")))))
333 (defun iso-accents-mode (&optional arg)
334 "Toggle ISO Accents mode, in which accents modify the following letter.
335 This permits easy insertion of accented characters according to ISO-8859-1.
336 When Iso-accents mode is enabled, accent character keys
337 \(`, ', \", ^, / and ~) do not self-insert; instead, they modify the following
338 letter key so that it inserts an ISO accented letter.
340 You can customize ISO Accents mode to a particular language
341 with the command `iso-accents-customize'.
343 Special combinations: ~c gives a c with cedilla,
344 ~d gives an Icelandic eth (d with dash).
345 ~t gives an Icelandic thorn.
346 \"s gives German sharp s.
347 /a gives a with ring.
348 /e gives an a-e ligature.
349 ~< and ~> give guillemots.
350 ~! gives an inverted exclamation mark.
351 ~? gives an inverted question mark.
353 With an argument, a positive argument enables ISO Accents mode,
354 and a negative argument disables it."
359 ;; Negative arg means switch it off.
360 (<= (prefix-numeric-value arg) 0)
361 ;; No arg means toggle.
363 (setq iso-accents-mode nil)
365 ;; Enable electric accents.
366 (setq iso-accents-mode t)))
368 (defun iso-accents-customize (language)
369 "Customize the ISO accents machinery for a particular language.
370 It selects the customization based on the specifications in the
371 `iso-languages' variable."
372 (interactive (list (completing-read "Language: " iso-languages nil t)))
373 (let ((table (cdr (assoc language iso-languages)))
376 (error "Unknown language `%s'" language)
377 (setq iso-accents-insert-offset (- (make-char (if (symbolp (car table))
381 (if (symbolp (car table))
382 (setq table (cdr table)))
383 (setq iso-language language
384 iso-accents-list table)
385 (if key-translation-map
386 (substitute-key-definition
387 'iso-accents-accent-key nil key-translation-map)
388 (setq key-translation-map (make-sparse-keymap)))
389 ;; Set up translations for all the characters that are used as
390 ;; accent prefixes in this language.
391 (setq tail iso-accents-list)
393 (define-key key-translation-map (vector (car (car tail)))
394 'iso-accents-accent-key)
395 (setq tail (cdr tail))))))
397 (defun iso-accentuate (start end)
398 "Convert two-character sequences in region into accented characters.
399 Noninteractively, this operates on text from START to END.
400 This uses the same conversion that ISO Accents mode uses for type-in."
404 (narrow-to-region start end)
408 (while (< (point) end)
409 (if (and (memq (preceding-char) iso-accents-enable)
410 (setq entry (cdr (assq (following-char) (assq (preceding-char) iso-accents-list)))))
416 (forward-char 1)))))))
418 (defun iso-accent-rassoc-unit (value alist)
420 (while (and alist (not elt))
421 (setq acc (car (car alist))
422 elt (car (rassq value (cdr (car alist))))
427 (defun iso-unaccentuate (start end)
428 "Convert accented characters in the region into two-character sequences.
429 Noninteractively, this operates on text from START to END.
430 This uses the opposite of the conversion done by ISO Accents mode for type-in."
434 (narrow-to-region start end)
437 (while (< (point) end)
438 (if (and (> (following-char) 127)
439 (setq entry (iso-accent-rassoc-unit (following-char)
443 (insert (car entry) (cdr entry))
445 (forward-char 1)))))))
447 (defun iso-deaccentuate (start end)
448 "Convert accented characters in the region into unaccented characters.
449 Noninteractively, this operates on text from START to END."
453 (narrow-to-region start end)
456 (while (< (point) end)
457 (if (and (> (following-char) 127)
458 (setq entry (iso-accent-rassoc-unit (following-char)
462 (insert (cdr entry)))
463 (forward-char 1)))))))
465 ;; Set up the default settings.
466 (iso-accents-customize "latin-1")
468 ;; Use Iso-Accents mode in the minibuffer
469 ;; if it was in use in the previous buffer.
470 (defun iso-acc-minibuf-setup ()
471 (setq iso-accents-mode
473 (set-buffer (window-buffer minibuffer-scroll-window))
476 (add-hook 'minibuffer-setup-hook 'iso-acc-minibuf-setup)
478 ;;; iso-acc.el ends here