1 ;;; mule-cmds.el --- Commands for multilingual environment
3 ;; Copyright (C) 1995,1999 Electrotechnical Laboratory, JAPAN.
4 ;; Licensed to the Free Software Foundation.
5 ;; Copyright (C) 1997 MORIOKA Tomohiko
7 ;; Keywords: mule, multilingual
9 ;; This file is part of XEmacs.
11 ;; XEmacs is free software; you can redistribute it and/or modify it
12 ;; 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 ;; XEmacs is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 ;;; MULE related key bindings and menus.
30 (defvar mule-keymap (make-sparse-keymap "MULE")
31 "Keymap for Mule (Multilingual environment) specific commands.")
33 ;; Keep "C-x C-m ..." for mule specific commands.
34 (define-key ctl-x-map "\C-m" mule-keymap)
36 (define-key mule-keymap "f" 'set-buffer-file-coding-system)
37 (define-key mule-keymap "F" 'set-default-buffer-file-coding-system) ; XEmacs
38 (define-key mule-keymap "t" 'set-terminal-coding-system)
39 (define-key mule-keymap "k" 'set-keyboard-coding-system)
40 (define-key mule-keymap "p" 'set-buffer-process-coding-system)
41 (define-key mule-keymap "x" 'set-selection-coding-system)
42 (define-key mule-keymap "X" 'set-next-selection-coding-system)
43 (define-key mule-keymap "\C-\\" 'set-input-method)
44 (define-key mule-keymap "c" 'universal-coding-system-argument)
45 ;;(define-key mule-keymap "c" 'list-coding-system-briefly) ; XEmacs
46 (define-key mule-keymap "C" 'describe-coding-system) ; XEmacs
47 (define-key mule-keymap "r" 'toggle-display-direction) ; XEmacs
48 (define-key mule-keymap "l" 'set-language-environment)
50 (define-key help-map "\C-L" 'describe-language-support)
51 (define-key help-map "L" 'describe-language-environment)
52 (define-key help-map "\C-\\" 'describe-input-method)
53 (define-key help-map "I" 'describe-input-method)
54 (define-key help-map "C" 'describe-coding-system)
55 (define-key help-map "h" 'view-hello-file)
57 ;; Menu for XEmacs were moved to menubar-items.el.
60 ;; This should be a single character key binding because users use it
61 ;; very frequently while editing multilingual text. Now we can use
62 ;; only two such keys: "\C-\\" and "\C-^", but the latter is not
63 ;; convenient because it requires shifting on most keyboards. An
64 ;; alternative is "\C-\]" which is now bound to `abort-recursive-edit'
65 ;; but it won't be used that frequently.
66 (define-key global-map "\C-\\" 'toggle-input-method)
68 ;;; This is no good because people often type Shift-SPC
69 ;;; meaning to type SPC. -- rms.
70 ;;; ;; Here's an alternative key binding for X users (Shift-SPACE).
71 ;;; (define-key global-map [?\S- ] 'toggle-input-method)
73 (defun coding-system-change-eol-conversion (coding-system eol-type)
74 "Return a coding system which differs from CODING-SYSTEM in eol conversion.
75 The returned coding system converts end-of-line by EOL-TYPE
76 but text as the same way as CODING-SYSTEM.
77 EOL-TYPE should be `unix', `lf', `dos', `crlf', `mac', `cr' or nil.
78 If EOL-TYPE is nil, the returned coding system detects
79 how end-of-line is formatted automatically while decoding.
81 EOL-TYPE can be specified by an integer 0, 1, or 2.
82 They means `unix', `dos', and `mac' respectively."
83 (if (symbolp eol-type)
84 (setq eol-type (cond ((or (eq eol-type 'unix)
87 ((or (eq eol-type 'dos)
90 ((or (eq eol-type 'mac)
94 (let ((orig-eol-type (coding-system-eol-type coding-system)))
95 (if (null orig-eol-type)
98 (coding-system-property coding-system eol-type))
99 (let ((base (coding-system-base coding-system)))
102 (if (= eol-type orig-eol-type)
104 (setq orig-eol-type (coding-system-eol-type base))
105 (if (null orig-eol-type)
106 (coding-system-property base eol-type))))))))
108 ;; (defun coding-system-change-text-conversion (coding-system coding)
109 ;; "Return a coding system which differs from CODING-SYSTEM in text conversion.
110 ;; The returned coding system converts text by CODING
111 ;; but end-of-line as the same way as CODING-SYSTEM.
112 ;; If CODING is nil, the returned coding system detects
113 ;; how text is formatted automatically while decoding."
115 ;; (coding-system-base coding-system)
116 ;; (let ((eol-type (coding-system-eol-type coding-system)))
117 ;; (coding-system-change-eol-conversion
119 ;; (if (numberp eol-type) (aref [unix dos mac] eol-type))))))
121 (defun view-hello-file ()
122 "Display the HELLO file which list up many languages and characters."
124 ;; We have to decode the file in any environment.
125 (let ((coding-system-for-read 'iso-2022-7bit))
126 (find-file-read-only (expand-file-name "HELLO" data-directory))))
128 (defun universal-coding-system-argument ()
129 "Execute an I/O command using the specified coding system."
131 (let* ((default (and buffer-file-coding-system
132 (not (eq (coding-system-type buffer-file-coding-system)
134 (coding-system-name buffer-file-coding-system)))
138 (format "Coding system for following command (default, %s): "
140 "Coding system for following command: ")
142 (keyseq (read-key-sequence
143 (format "Command to execute with %s:" coding-system)))
144 (cmd (key-binding keyseq)))
145 (let ((coding-system-for-read coding-system)
146 (coding-system-for-write coding-system))
148 (call-interactively cmd))))
150 (defun set-default-coding-systems (coding-system)
151 "Set default value of various coding systems to CODING-SYSTEM.
152 This sets the following coding systems:
153 o coding system of a newly created buffer
154 o default coding system for subprocess I/O
155 This also sets the following values:
156 o default value used as file-name-coding-system for converting file names.
157 o default value for the command `set-terminal-coding-system' (not on MSDOS)
158 o default value for the command `set-keyboard-coding-system'."
159 (check-coding-system coding-system)
160 ;;(setq-default buffer-file-coding-system coding-system)
161 (set-default-buffer-file-coding-system coding-system)
162 ;; (if default-enable-multibyte-characters
163 ;; (setq default-file-name-coding-system coding-system))
164 ;; If coding-system is nil, honor that on MS-DOS as well, so
165 ;; that they could reset the terminal coding system.
166 ;; (unless (and (eq window-system 'pc) coding-system)
167 ;; (setq default-terminal-coding-system coding-system))
168 (setq terminal-coding-system coding-system)
169 ;;(setq default-keyboard-coding-system coding-system)
170 (setq keyboard-coding-system coding-system)
171 ;;(setq default-process-coding-system (cons coding-system coding-system))
172 (add-hook 'comint-exec-hook
174 (let ((proc (get-buffer-process (current-buffer))))
175 (set-process-input-coding-system proc ',coding-system)
176 (set-process-output-coding-system proc ',coding-system)))
178 (setq file-name-coding-system coding-system))
180 (defun prefer-coding-system (coding-system)
181 "Add CODING-SYSTEM at the front of the priority list for automatic detection.
182 This also sets the following coding systems:
183 o coding system of a newly created buffer
184 o default coding system for subprocess I/O
185 This also sets the following values:
186 o default value used as file-name-coding-system for converting file names.
187 o default value for the command `set-terminal-coding-system' (not on MSDOS)
188 o default value for the command `set-keyboard-coding-system'
190 If CODING-SYSTEM specifies a certain type of EOL conversion, the coding
191 systems set by this function will use that type of EOL conversion.
193 This command does not change the default value of terminal coding system
194 for MS-DOS terminal, because DOS terminals only support a single coding
195 system, and Emacs automatically sets the default to that coding system at
197 (interactive "zPrefer coding system: ")
198 (if (not (and coding-system (find-coding-system coding-system)))
199 (error "Invalid coding system `%s'" coding-system))
200 (let ((coding-category (coding-system-category coding-system))
201 (base (coding-system-base coding-system))
202 (eol-type (coding-system-eol-type coding-system)))
203 (if (not coding-category)
204 ;; CODING-SYSTEM is no-conversion or undecided.
205 (error "Can't prefer the coding system `%s'" coding-system))
206 (set-coding-category-system coding-category (or base coding-system))
207 ;; (update-coding-systems-internal)
208 (or (eq coding-category (car (coding-category-list)))
209 ;; We must change the order.
210 (set-coding-priority-list (list coding-category)))
211 (if (and base (interactive-p))
212 (message "Highest priority is set to %s (base of %s)"
214 ;; If they asked for specific EOL conversion, honor that.
215 (if (memq eol-type '(lf crlf mac))
217 (coding-system-change-eol-conversion base eol-type))
218 (setq coding-system base))
219 (set-default-coding-systems coding-system)))
221 ;; (defun find-coding-systems-region-subset-p (list1 list2)
222 ;; "Return non-nil if all elements in LIST1 are included in LIST2.
223 ;; Comparison done with EQ."
226 ;; (or (memq (car list1) list2)
228 ;; (setq list1 (cdr list1)))
231 ;; (defun find-coding-systems-region (from to)
232 ;; "Return a list of proper coding systems to encode a text between FROM and TO.
233 ;; All coding systems in the list can safely encode any multibyte characters
236 ;; If the text contains no multibyte characters, return a list of a single
237 ;; element `undecided'."
238 ;; (find-coding-systems-for-charsets (find-charset-region from to)))
240 ;; (defun find-coding-systems-string (string)
241 ;; "Return a list of proper coding systems to encode STRING.
242 ;; All coding systems in the list can safely encode any multibyte characters
245 ;; If STRING contains no multibyte characters, return a list of a single
246 ;; element `undecided'."
247 ;; (find-coding-systems-for-charsets (find-charset-string string)))
249 ;; (defun find-coding-systems-for-charsets (charsets)
250 ;; "Return a list of proper coding systems to encode characters of CHARSETS.
251 ;; CHARSETS is a list of character sets."
252 ;; (if (or (null charsets)
253 ;; (and (= (length charsets) 1)
254 ;; (eq 'ascii (car charsets))))
256 ;; (setq charsets (delq 'composition charsets))
257 ;; (let ((l (coding-system-list 'base-only))
258 ;; (charset-preferred-codings
261 ;; (if (eq x 'unknown)
263 ;; (get-charset-property x 'preferred-coding-system))))
265 ;; (priorities (mapcar (function (lambda (x) (symbol-value x)))
266 ;; coding-category-list))
267 ;; codings coding safe)
268 ;; (if (memq 'unknown charsets)
269 ;; ;; The region contains invalid multibyte characters.
270 ;; (setq l '(raw-text)))
272 ;; (setq coding (car l) l (cdr l))
273 ;; (if (and (setq safe (coding-system-get coding 'safe-charsets))
275 ;; (find-coding-systems-region-subset-p charsets safe)))
276 ;; ;; We put the higher priority to coding systems included
277 ;; ;; in CHARSET-PREFERRED-CODINGS, and within them, put the
278 ;; ;; higher priority to coding systems which support smaller
279 ;; ;; number of charsets.
281 ;; (+ (if (coding-system-get coding 'mime-charset) 4096 0)
282 ;; (lsh (length (memq coding priorities)) 7)
283 ;; (if (memq coding charset-preferred-codings) 64 0)
284 ;; (if (> (coding-system-type coding) 0) 32 0)
285 ;; (if (consp safe) (- 32 (length safe)) 0))))
286 ;; (setq codings (cons (cons priority coding) codings)))))
288 ;; (sort codings (function (lambda (x y) (> (car x) (car y))))))
291 ;; (defun find-multibyte-characters (from to &optional maxcount excludes)
292 ;; "Find multibyte characters in the region specified by FROM and TO.
293 ;; If FROM is a string, find multibyte characters in the string.
294 ;; The return value is an alist of the following format:
295 ;; ((CHARSET COUNT CHAR ...) ...)
297 ;; CHARSET is a character set,
298 ;; COUNT is a number of characters,
299 ;; CHARs are found characters of the character set.
300 ;; Optional 3rd arg MAXCOUNT limits how many CHARs are put in the above list.
301 ;; Optional 4th arg EXCLUDE is a list of character sets to be ignored.
303 ;; For invalid characters, CHARs are actually strings."
306 ;; (if (stringp from)
308 ;; (while (setq idx (string-match "[^\000-\177]" from idx))
309 ;; (setq char (aref from idx)
310 ;; charset (char-charset char))
311 ;; (if (eq charset 'unknown)
312 ;; (setq char (match-string 0)))
313 ;; (if (or (eq charset 'unknown)
314 ;; (not (or (eq excludes t) (memq charset excludes))))
315 ;; (let ((slot (assq charset chars)))
317 ;; (if (not (memq char (nthcdr 2 slot)))
318 ;; (let ((count (nth 1 slot)))
319 ;; (setcar (cdr slot) (1+ count))
320 ;; (if (or (not maxcount) (< count maxcount))
321 ;; (nconc slot (list char)))))
322 ;; (setq chars (cons (list charset 1 char) chars)))))
323 ;; (setq idx (1+ idx))))
326 ;; (while (re-search-forward "[^\000-\177]" to t)
327 ;; (setq char (preceding-char)
328 ;; charset (char-charset char))
329 ;; (if (eq charset 'unknown)
330 ;; (setq char (match-string 0)))
331 ;; (if (or (eq charset 'unknown)
332 ;; (not (or (eq excludes t) (memq charset excludes))))
333 ;; (let ((slot (assq charset chars)))
335 ;; (if (not (member char (nthcdr 2 slot)))
336 ;; (let ((count (nth 1 slot)))
337 ;; (setcar (cdr slot) (1+ count))
338 ;; (if (or (not maxcount) (< count maxcount))
339 ;; (nconc slot (list char)))))
340 ;; (setq chars (cons (list charset 1 char) chars))))))))
341 ;; (nreverse chars)))
343 ;; (defvar last-coding-system-specified nil
344 ;; "Most recent coding system explicitly specified by the user when asked.
345 ;; This variable is set whenever Emacs asks the user which coding system
346 ;; to use in order to write a file. If you set it to nil explicitly,
347 ;; then call `write-region', then afterward this variable will be non-nil
348 ;; only if the user was explicitly asked and specified a coding system.")
350 ;; (defun select-safe-coding-system (from to &optional default-coding-system)
351 ;; "Ask a user to select a safe coding system from candidates.
352 ;; The candidates of coding systems which can safely encode a text
353 ;; between FROM and TO are shown in a popup window.
355 ;; Optional arg DEFAULT-CODING-SYSTEM specifies a coding system to be
356 ;; checked at first. If omitted, buffer-file-coding-system of the
357 ;; current buffer is used.
359 ;; If the text can be encoded safely by DEFAULT-CODING-SYSTEM, it is
360 ;; returned without any user interaction.
362 ;; Kludgy feature: if FROM is a string, the string is the target text,
363 ;; and TO is ignored."
364 ;; (or default-coding-system
365 ;; (setq default-coding-system buffer-file-coding-system))
366 ;; (let* ((charsets (if (stringp from) (find-charset-string from)
367 ;; (find-charset-region from to)))
368 ;; (safe-coding-systems (find-coding-systems-for-charsets charsets)))
369 ;; (if (or (not enable-multibyte-characters)
370 ;; (eq (car safe-coding-systems) 'undecided)
371 ;; (eq default-coding-system 'no-conversion)
372 ;; (and default-coding-system
373 ;; (memq (coding-system-base default-coding-system)
374 ;; safe-coding-systems)))
375 ;; default-coding-system
377 ;; ;; At first, change each coding system to the corresponding
378 ;; ;; mime-charset name if it is also a coding system.
379 ;; (let ((l safe-coding-systems)
382 ;; (setq mime-charset (coding-system-get (car l) 'mime-charset))
383 ;; (if (and mime-charset (coding-system-p mime-charset))
384 ;; (setcar l mime-charset))
385 ;; (setq l (cdr l))))
387 ;; (let ((non-safe-chars (find-multibyte-characters
389 ;; (and default-coding-system
390 ;; (coding-system-get default-coding-system
391 ;; 'safe-charsets))))
392 ;; show-position overlays)
394 ;; ;; Highlight characters that default-coding-system can't encode.
395 ;; (when (integerp from)
397 ;; (let ((found nil))
398 ;; (while (and (not found)
399 ;; (re-search-forward "[^\000-\177]" to t))
400 ;; (setq found (assq (char-charset (preceding-char))
401 ;; non-safe-chars))))
403 ;; (setq show-position (point))
405 ;; (while (and (< (length overlays) 256)
406 ;; (re-search-forward "[^\000-\177]" to t))
407 ;; (let* ((char (preceding-char))
408 ;; (charset (char-charset char)))
409 ;; (when (assq charset non-safe-chars)
410 ;; (setq overlays (cons (make-overlay (1- (point)) (point))
412 ;; (overlay-put (car overlays) 'face 'highlight))))))
414 ;; ;; At last, ask a user to select a proper coding system.
416 ;; (save-window-excursion
417 ;; (when show-position
418 ;; ;; At first, be sure to show the current buffer.
419 ;; (set-window-buffer (selected-window) (current-buffer))
420 ;; (set-window-start (selected-window) show-position))
421 ;; ;; Then, show a helpful message.
422 ;; (with-output-to-temp-buffer "*Warning*"
424 ;; (set-buffer standard-output)
425 ;; (insert "The target text contains the following non ASCII character(s):\n")
426 ;; (let ((len (length non-safe-chars))
428 ;; (while (and non-safe-chars (< shown 3))
429 ;; (when (> (length (car non-safe-chars)) 2)
430 ;; (setq shown (1+ shown))
431 ;; (insert (format "%25s: " (car (car non-safe-chars))))
432 ;; (let ((l (nthcdr 2 (car non-safe-chars))))
434 ;; (if (or (stringp (car l)) (char-valid-p (car l)))
436 ;; (setq l (cdr l))))
437 ;; (if (> (nth 1 (car non-safe-chars)) 3)
440 ;; (setq non-safe-chars (cdr non-safe-chars)))
442 ;; (insert (format "%27s\n" "..."))))
443 ;; (insert (format "\
444 ;; These can't be encoded safely by the coding system %s.
446 ;; Please select one from the following safe coding systems:\n"
447 ;; default-coding-system))
448 ;; (let ((pos (point))
449 ;; (fill-prefix " "))
450 ;; (mapcar (function (lambda (x) (princ " ") (princ x)))
451 ;; safe-coding-systems)
452 ;; (fill-region-as-paragraph pos (point)))))
454 ;; ;; Read a coding system.
455 ;; (let* ((safe-names (mapcar (lambda (x) (list (symbol-name x)))
456 ;; safe-coding-systems))
457 ;; (name (completing-read
458 ;; (format "Select coding system (default %s): "
459 ;; (car safe-coding-systems))
460 ;; safe-names nil t nil nil
461 ;; (car (car safe-names)))))
462 ;; (setq last-coding-system-specified (intern name))
463 ;; (if (integerp (coding-system-eol-type default-coding-system))
464 ;; (setq last-coding-system-specified
465 ;; (coding-system-change-eol-conversion
466 ;; last-coding-system-specified
467 ;; (coding-system-eol-type default-coding-system))))
468 ;; last-coding-system-specified))
469 ;; (kill-buffer "*Warning*")
471 ;; (delete-overlay (car overlays))
472 ;; (setq overlays (cdr overlays)))))))))
474 ;; (setq select-safe-coding-system-function 'select-safe-coding-system)
476 ;; (defun select-message-coding-system ()
477 ;; "Return a coding system to encode the outgoing message of the current buffer.
478 ;; It at first tries the first coding system found in these variables
480 ;; (1) local value of `buffer-file-coding-system'
481 ;; (2) value of `sendmail-coding-system'
482 ;; (3) value of `default-buffer-file-coding-system'
483 ;; (4) value of `default-sendmail-coding-system'
484 ;; If the found coding system can't encode the current buffer,
485 ;; or none of them are bound to a coding system,
486 ;; it asks the user to select a proper coding system."
487 ;; (let ((coding (or (and (local-variable-p 'buffer-file-coding-system)
488 ;; buffer-file-coding-system)
489 ;; sendmail-coding-system
490 ;; default-buffer-file-coding-system
491 ;; default-sendmail-coding-system)))
492 ;; (if (eq coding 'no-conversion)
493 ;; ;; We should never use no-conversion for outgoing mails.
494 ;; (setq coding nil))
495 ;; (if (fboundp select-safe-coding-system-function)
496 ;; (funcall select-safe-coding-system-function
497 ;; (point-min) (point-max) coding)
500 ;;; Language support stuff.
502 (defvar language-info-alist nil
503 "Alist of language environment definitions.
504 Each element looks like:
505 (LANGUAGE-NAME . ((KEY . INFO) ...))
506 where LANGUAGE-NAME is a string, the name of the language environment,
507 KEY is a symbol denoting the kind of information, and
508 INFO is the data associated with KEY.
509 Meaningful values for KEY include
511 documentation value is documentation of what this language environment
512 is meant for, and how to use it.
513 charset value is a list of the character sets used by this
514 language environment.
515 sample-text value is one line of text,
516 written using those character sets,
517 appropriate for this language environment.
518 setup-function value is a function to call to switch to this
519 language environment.
520 exit-function value is a function to call to leave this
521 language environment.
522 coding-system value is a list of coding systems that are good
523 for saving text written in this language environment.
524 This list serves as suggestions to the user;
525 in effect, as a kind of documentation.
526 coding-priority value is a list of coding systems for this language
527 environment, in order of decreasing priority.
528 This is used to set up the coding system priority
529 list when you switch to this language environment.
530 input-method value is a default input method for this language
532 features value is a list of features requested in this
533 language environment.
534 tutorial value is a tutorial file name written in the language.")
536 (defun get-language-info (lang-env key)
537 "Return information listed under KEY for language environment LANG-ENV.
538 KEY is a symbol denoting the kind of information.
539 For a list of useful values for KEY and their meanings,
540 see `language-info-alist'."
541 (if (symbolp lang-env)
542 (setq lang-env (symbol-name lang-env)))
543 (let ((lang-slot (assoc-ignore-case lang-env language-info-alist)))
545 (cdr (assq key (cdr lang-slot))))))
547 (defun set-language-info (lang-env key info)
548 "Modify part of the definition of language environment LANG-ENV.
549 Specifically, this stores the information INFO under KEY
550 in the definition of this language environment.
551 KEY is a symbol denoting the kind of information.
552 INFO is the value for that information.
554 For a list of useful values for KEY and their meanings,
555 see `language-info-alist'."
556 (if (symbolp lang-env)
557 (setq lang-env (symbol-name lang-env)))
558 (let (lang-slot key-slot)
559 (setq lang-slot (assoc lang-env language-info-alist))
560 (if (null lang-slot) ; If no slot for the language, add it.
561 (setq lang-slot (list lang-env)
562 language-info-alist (cons lang-slot language-info-alist)))
563 (setq key-slot (assq key lang-slot))
564 (if (null key-slot) ; If no slot for the key, add it.
566 (setq key-slot (list key))
567 (setcdr lang-slot (cons key-slot (cdr lang-slot)))))
568 (setcdr key-slot info)))
570 (defun set-language-info-alist (lang-env alist &optional parents)
571 "Store ALIST as the definition of language environment LANG-ENV.
572 ALIST is an alist of KEY and INFO values. See the documentation of
573 `set-language-info' for the meanings of KEY and INFO."
574 (if (symbolp lang-env)
575 (setq lang-env (symbol-name lang-env)))
576 (let (; (describe-map describe-language-environment-map)
577 ; (setup-map setup-language-environment-map)
581 ;; map parent-symbol parent)
583 ;; (if (symbolp (setq parent-symbol (car l)))
584 ;; (setq parent (symbol-name parent))
585 ;; (setq parent parent-symbol parent-symbol (intern parent)))
586 ;; (setq map (lookup-key describe-map (vector parent-symbol)))
589 ;; (setq map (intern (format "describe-%s-environment-map"
590 ;; (downcase parent))))
591 ;; (define-prefix-command map)
592 ;; (define-key-after describe-map (vector parent-symbol)
593 ;; (cons parent map) t)))
594 ;; (setq describe-map (symbol-value map))
595 ;; (setq map (lookup-key setup-map (vector parent-symbol)))
598 ;; (setq map (intern (format "setup-%s-environment-map"
599 ;; (downcase parent))))
600 ;; (define-prefix-command map)
601 ;; (define-key-after setup-map (vector parent-symbol)
602 ;; (cons parent map) t)))
603 ;; (setq setup-map (symbol-value map))
604 ;; (setq l (cdr l)))))
606 ;; Set up menu items for this language env.
607 (let ((doc (assq 'documentation alist)))
609 ;; (define-key-after describe-map (vector (intern lang-env))
610 ;; (cons lang-env 'describe-specified-language-support) t)
611 (when (featurep 'menubar)
615 '("Mule" "Describe Language Support")
617 '(describe-language-environment ,lang-env)
620 ;; (define-key-after setup-map (vector (intern lang-env))
621 ;; (cons lang-env 'setup-specified-language-environment) t)
622 (when (featurep 'menubar)
626 '("Mule" "Set Language Environment")
628 '(set-language-environment ,lang-env)
632 (set-language-info lang-env (car (car alist)) (cdr (car alist)))
633 (setq alist (cdr alist)))))
635 (defun read-language-name (key prompt &optional default)
636 "Read a language environment name which has information for KEY.
637 If KEY is nil, read any language environment.
638 Prompt with PROMPT. DEFAULT is the default choice of language environment.
639 This returns a language environment name as a string."
640 (let* ((completion-ignore-case t)
641 (name (completing-read prompt
644 (function (lambda (elm) (assq key elm))))
646 (if (and (> (length name) 0)
648 (get-language-info name key)))
651 ;;; Multilingual input methods.
653 (defconst leim-list-file-name "leim-list.el"
654 "Name of LEIM list file.
655 This file contains a list of libraries of Emacs input methods (LEIM)
656 in the format of Lisp expression for registering each input method.
657 Emacs loads this file at startup time.")
659 (defvar leim-list-header (format
660 ";;; %s -- list of LEIM (Library of Emacs Input Method)
662 ;; This file contains a list of LEIM (Library of Emacs Input Method)
663 ;; in the same directory as this file. Loading this file registers
664 ;; the whole input methods in Emacs.
666 ;; Each entry has the form:
667 ;; (register-input-method
668 ;; INPUT-METHOD LANGUAGE-NAME ACTIVATE-FUNC
671 ;; See the function `register-input-method' for the meanings of arguments.
673 ;; If this directory is included in load-path, Emacs automatically
674 ;; loads this file at startup time.
678 "Header to be inserted in LEIM list file.")
680 (defvar leim-list-entry-regexp "^(register-input-method"
681 "Regexp matching head of each entry in LEIM list file.
682 See also the variable `leim-list-header'")
684 (defvar update-leim-list-functions
685 '(quail-update-leim-list-file)
686 "List of functions to call to update LEIM list file.
687 Each function is called with one arg, LEIM directory name.")
689 (defun update-leim-list-file (&rest dirs)
690 "Update LEIM list file in directories DIRS."
691 (let ((functions update-leim-list-functions))
693 (apply (car functions) dirs)
694 (setq functions (cdr functions)))))
696 (defvar current-input-method nil
697 "The current input method for multilingual text.
698 If nil, that means no input method is activated now.")
699 (make-variable-buffer-local 'current-input-method)
700 (put 'current-input-method 'permanent-local t)
702 (defvar current-input-method-title nil
703 "Title string of the current input method shown in mode line.")
704 (make-variable-buffer-local 'current-input-method-title)
705 (put 'current-input-method-title 'permanent-local t)
707 (defcustom default-input-method nil
708 "*Default input method for multilingual text (a string).
709 This is the input method activated automatically by the command
710 `toggle-input-method' (\\[toggle-input-method])."
712 :type '(choice (const nil) string))
714 (put 'input-method-function 'permanent-local t)
716 (defvar input-method-history nil
717 "History list for some commands that read input methods.")
718 (make-variable-buffer-local 'input-method-history)
719 (put 'input-method-history 'permanent-local t)
721 (defvar inactivate-current-input-method-function nil
722 "Function to call for inactivating the current input method.
723 Every input method should set this to an appropriate value when activated.
724 This function is called with no argument.
726 This function should never change the value of `current-input-method'.
727 It is set to nil by the function `inactivate-input-method'.")
728 (make-variable-buffer-local 'inactivate-current-input-method-function)
729 (put 'inactivate-current-input-method-function 'permanent-local t)
731 (defvar describe-current-input-method-function nil
732 "Function to call for describing the current input method.
733 This function is called with no argument.")
734 (make-variable-buffer-local 'describe-current-input-method-function)
735 (put 'describe-current-input-method-function 'permanent-local t)
737 (defvar input-method-alist nil
738 "Alist of input method names vs how to use them.
739 Each element has the form:
740 (INPUT-METHOD LANGUAGE-ENV ACTIVATE-FUNC TITLE DESCRIPTION ARGS...)
741 See the function `register-input-method' for the meanings of the elements.")
743 (defun register-input-method (input-method lang-env &rest args)
744 "Register INPUT-METHOD as an input method for language environment ENV.
745 INPUT-METHOD and LANG-ENV are symbols or strings.
747 The remaining arguments are:
748 ACTIVATE-FUNC, TITLE, DESCRIPTION, and ARGS...
749 ACTIVATE-FUNC is a function to call to activate this method.
750 TITLE is a string to show in the mode line when this method is active.
751 DESCRIPTION is a string describing this method and what it is good for.
752 The ARGS, if any, are passed as arguments to ACTIVATE-FUNC.
753 All told, the arguments to ACTIVATE-FUNC are INPUT-METHOD and the ARGS.
755 This function is mainly used in the file \"leim-list.el\" which is
756 created at building time of emacs, registering all quail input methods
757 contained in the emacs distribution.
759 In case you want to register a new quail input method by yourself, be
760 careful to use the same input method title as given in the third
761 parameter of `quail-define-package' (if the values are different, the
762 string specified in this function takes precedence).
764 The commands `describe-input-method' and `list-input-methods' need
765 this duplicated values to show some information about input methods
766 without loading the affected quail packages."
767 (if (symbolp lang-env)
768 (setq lang-env (symbol-name lang-env)))
769 (if (symbolp input-method)
770 (setq input-method (symbol-name input-method)))
771 (let ((info (cons lang-env args))
772 (slot (assoc input-method input-method-alist)))
775 (setq slot (cons input-method info))
776 (setq input-method-alist (cons slot input-method-alist)))))
778 (defun read-input-method-name (prompt &optional default inhibit-null)
779 "Read a name of input method from a minibuffer prompting with PROMPT.
780 If DEFAULT is non-nil, use that as the default,
781 and substitute it into PROMPT at the first `%s'.
782 If INHIBIT-NULL is non-nil, null input signals an error.
784 The return value is a string."
786 (setq prompt (format prompt default)))
787 (let* ((completion-ignore-case t)
788 ;; This binding is necessary because input-method-history is
790 (input-method (completing-read prompt input-method-alist
791 nil t nil 'input-method-history
793 (if (> (length input-method) 0)
796 (error "No valid input method is specified")))))
798 (defun activate-input-method (input-method)
799 "Switch to input method INPUT-METHOD for the current buffer.
800 If some other input method is already active, turn it off first.
801 If INPUT-METHOD is nil, deactivate any current input method."
802 (if (and input-method (symbolp input-method))
803 (setq input-method (symbol-name input-method)))
804 (if (and current-input-method
805 (not (string= current-input-method input-method)))
806 (inactivate-input-method))
807 (unless (or current-input-method (null input-method))
808 (let ((slot (assoc input-method input-method-alist)))
810 (error "Can't activate input method `%s'" input-method))
811 (let ((func (nth 2 slot)))
813 (apply (nth 2 slot) input-method (nthcdr 5 slot))
814 (if (and (consp func) (symbolp (car func)) (symbolp (cdr func)))
817 (apply (car func) input-method (nthcdr 5 slot)))
818 (error "Can't activate input method `%s'" input-method))))
819 (setq current-input-method input-method)
820 (setq current-input-method-title (nth 3 slot))
822 (run-hooks 'input-method-activate-hook)
823 (force-mode-line-update)))))
825 (defun inactivate-input-method ()
826 "Turn off the current input method."
827 (when current-input-method
828 (if input-method-history
829 (unless (string= current-input-method (car input-method-history))
830 (setq input-method-history
831 (cons current-input-method
832 (delete current-input-method input-method-history))))
833 (setq input-method-history (list current-input-method)))
835 (funcall inactivate-current-input-method-function)
837 (run-hooks 'input-method-inactivate-hook)
838 (setq current-input-method nil
839 current-input-method-title nil)
840 (force-mode-line-update)))))
842 (defun set-input-method (input-method)
843 "Select and activate input method INPUT-METHOD for the current buffer.
844 This also sets the default input method to the one you specify."
846 (let* ((default (or (car input-method-history) default-input-method)))
847 (list (read-input-method-name
848 (if default "Select input method (default %s): " "Select input method: ")
850 (activate-input-method input-method)
851 (setq default-input-method input-method))
853 (defun toggle-input-method (&optional arg)
854 "Turn on or off a multilingual text input method for the current buffer.
856 With no prefix argument, if an input method is currently activated,
857 turn it off. Otherwise, activate an input method -- the one most
858 recently used, or the one specified in `default-input-method', or
859 the one read from the minibuffer.
861 With a prefix argument, read an input method from the minibuffer and
864 The default is to use the most recent input method specified
865 \(not including the currently active input method, if any)."
867 (if (and current-input-method (not arg))
868 (inactivate-input-method)
869 (let ((default (or (car input-method-history) default-input-method)))
870 (if (and arg default (equal current-input-method default)
871 (> (length input-method-history) 1))
872 (setq default (nth 1 input-method-history)))
873 (activate-input-method
874 (if (or arg (not default))
876 (read-input-method-name
877 (if default "Input method (default %s): " "Input method: " )
880 (or default-input-method
881 (setq default-input-method current-input-method)))))
883 (defun describe-input-method (input-method)
884 "Describe input method INPUT-METHOD."
886 (list (read-input-method-name
887 "Describe input method (default, current choice): ")))
888 (if (and input-method (symbolp input-method))
889 (setq input-method (symbol-name input-method)))
890 (if (null input-method)
891 (describe-current-input-method)
892 (with-output-to-temp-buffer "*Help*"
893 (let ((elt (assoc input-method input-method-alist)))
894 (princ (format "Input method: %s (`%s' in mode line) for %s\n %s\n"
895 input-method (nth 3 elt) (nth 1 elt) (nth 4 elt)))))))
897 (defun describe-current-input-method ()
898 "Describe the input method currently in use."
899 (if current-input-method
900 (if (and (symbolp describe-current-input-method-function)
901 (fboundp describe-current-input-method-function))
902 (funcall describe-current-input-method-function)
903 (message "No way to describe the current input method `%s'"
904 current-input-method)
906 (error "No input method is activated now")))
908 (defun read-multilingual-string (prompt &optional initial-input input-method)
909 "Read a multilingual string from minibuffer, prompting with string PROMPT.
910 The input method selected last time is activated in minibuffer.
911 If optional second arg INITIAL-INPUT is non-nil, insert it in the minibuffer
913 Optional 3rd argument INPUT-METHOD specifies the input method
914 to be activated instead of the one selected last time. It is a symbol
920 (read-input-method-name "Input method: " nil t)))
921 (if (and input-method (symbolp input-method))
922 (setq input-method (symbol-name input-method)))
923 (let ((prev-input-method current-input-method))
926 (activate-input-method input-method)
928 ;; (read-string prompt initial-input nil nil t)
929 (read-string prompt initial-input nil))
930 (activate-input-method prev-input-method))))
932 ;; Variables to control behavior of input methods. All input methods
933 ;; should react to these variables.
935 (defcustom input-method-verbose-flag 'default
936 "*A flag to control extra guidance given by input methods.
937 The value should be nil, t, `complex-only', or `default'.
939 The extra guidance is done by showing list of available keys in echo
940 area. When you use the input method in the minibuffer, the guidance
941 is shown at the bottom short window (split from the existing window).
943 If the value is t, extra guidance is always given, if the value is
944 nil, extra guidance is always suppressed.
946 If the value is `complex-only', only complex input methods such as
947 `chinese-py' and `japanese' give extra guidance.
949 If the value is `default', complex input methods always give extra
950 guidance, but simple input methods give it only when you are not in
953 See also the variable `input-method-highlight-flag'."
954 :type '(choice (const t) (const nil) (const complex-only) (const default))
957 (defcustom input-method-highlight-flag t
958 "*If this flag is non-nil, input methods highlight partially-entered text.
959 For instance, while you are in the middle of a Quail input method sequence,
960 the text inserted so far is temporarily underlined.
961 The underlining goes away when you finish or abort the input method sequence.
962 See also the variable `input-method-verbose-flag'."
966 (defvar input-method-activate-hook nil
967 "Normal hook run just after an input method is activated.
969 The variable `current-input-method' keeps the input method name
972 (defvar input-method-inactivate-hook nil
973 "Normal hook run just after an input method is inactivated.
975 The variable `current-input-method' still keeps the input method name
978 (defvar input-method-after-insert-chunk-hook nil
979 "Normal hook run just after an input method insert some chunk of text.")
981 (defvar input-method-exit-on-first-char nil
982 "This flag controls a timing when an input method returns.
983 Usually, the input method does not return while there's a possibility
984 that it may find a different translation if a user types another key.
985 But, it this flag is non-nil, the input method returns as soon as
986 the current key sequence gets long enough to have some valid translation.")
988 (defvar input-method-use-echo-area nil
989 "This flag controls how an input method shows an intermediate key sequence.
990 Usually, the input method inserts the intermediate key sequence,
991 or candidate translations corresponding to the sequence,
992 at point in the current buffer.
993 But, if this flag is non-nil, it displays them in echo area instead.")
995 (defvar input-method-exit-on-invalid-key nil
996 "This flag controls the behaviour of an input method on invalid key input.
997 Usually, when a user types a key which doesn't start any character
998 handled by the input method, the key is handled by turning off the
999 input method temporarily. After that key, the input method is re-enabled.
1000 But, if this flag is non-nil, the input method is never back on.")
1003 (defvar set-language-environment-hook nil
1004 "Normal hook run after some language environment is set.
1006 When you set some hook function here, that effect usually should not
1007 be inherited to another language environment. So, you had better set
1008 another function in `exit-language-environment-hook' (which see) to
1009 cancel the effect.")
1011 (defvar exit-language-environment-hook nil
1012 "Normal hook run after exiting from some language environment.
1013 When this hook is run, the variable `current-language-environment'
1014 is still bound to the language environment being exited.
1016 This hook is mainly used for canceling the effect of
1017 `set-language-environment-hook' (which-see).")
1019 (put 'setup-specified-language-environment 'apropos-inhibit t)
1021 (defun setup-specified-language-environment ()
1022 "Switch to a specified language environment."
1024 (let (language-name)
1025 (if (and (symbolp last-command-event)
1026 (or (not (eq last-command-event 'Default))
1027 (setq last-command-event 'English))
1028 (setq language-name (symbol-name last-command-event)))
1029 (set-language-environment language-name)
1030 (error "Bogus calling sequence"))))
1032 (defcustom current-language-environment "English"
1033 "The last language environment specified with `set-language-environment'.
1034 This variable should be set only with \\[customize], which is equivalent
1035 to using the function `set-language-environment'."
1036 :link '(custom-manual "(emacs)Language Environments")
1037 :set (lambda (symbol value) (set-language-environment value))
1039 (or (car-safe (assoc-ignore-case
1040 (if (symbolp current-language-environment)
1041 (symbol-name current-language-environment)
1042 current-language-environment)
1043 language-info-alist))
1045 :type (cons 'choice (mapcar (lambda (lang)
1046 (list 'const (car lang)))
1047 language-info-alist))
1048 :initialize 'custom-initialize-default
1052 (defun reset-language-environment ()
1053 "Reset multilingual environment of Emacs to the default status.
1055 The default status is as follows:
1057 The default value of buffer-file-coding-system is nil.
1058 The default coding system for process I/O is nil.
1059 The default value for the command `set-terminal-coding-system' is nil.
1060 The default value for the command `set-keyboard-coding-system' is nil.
1062 The order of priorities of coding categories and the coding system
1063 bound to each category are as follows
1064 coding category coding system
1065 --------------------------------------------------
1069 iso-lock-shift iso-2022-lock
1070 iso-8-designate iso-2022-8bit-ss2
1071 no-conversion raw-text
1078 ;; This function formerly set default-enable-multibyte-characters to t,
1079 ;; but that is incorrect. It should not alter the unibyte/multibyte choice.
1081 (set-coding-category-system 'iso-7 'iso-2022-7bit)
1082 (set-coding-category-system 'iso-8-1 'iso-8859-1)
1083 (set-coding-category-system 'iso-8-2 'iso-8859-1)
1084 (set-coding-category-system 'iso-lock-shift 'iso-2022-lock)
1085 (set-coding-category-system 'iso-8-designate 'iso-2022-8bit-ss2)
1086 (set-coding-category-system 'no-conversion 'raw-text)
1087 (set-coding-category-system 'shift-jis 'shift_jis)
1088 (set-coding-category-system 'big5 'big5)
1089 (set-coding-category-system 'ucs-4 'binary)
1090 (set-coding-category-system 'utf-8 'raw-text)
1092 (set-coding-priority-list
1102 ;; (update-coding-systems-internal)
1104 (set-default-coding-systems nil)
1105 ;; Don't alter the terminal and keyboard coding systems here.
1106 ;; The terminal still supports the same coding system
1107 ;; that it supported a minute ago.
1108 ;;; (set-terminal-coding-system-internal nil)
1109 ;;; (set-keyboard-coding-system-internal nil)
1111 ;; (setq nonascii-translation-table nil
1112 ;; nonascii-insert-offset 0)
1115 (defun set-language-environment (language-name)
1116 "Set up multi-lingual environment for using LANGUAGE-NAME.
1117 This sets the coding system priority and the default input method
1118 and sometimes other things. LANGUAGE-NAME should be a string
1119 which is the name of a language environment. For example, \"Latin-1\"
1120 specifies the character set for the major languages of Western Europe."
1121 (interactive (list (read-language-name
1123 "Set language environment (default, English): ")))
1125 (if (symbolp language-name)
1126 (setq language-name (symbol-name language-name)))
1127 (setq language-name "English"))
1128 (or (assoc-ignore-case language-name language-info-alist)
1129 (error "Language environment not defined: %S" language-name))
1130 (if current-language-environment
1131 (let ((func (get-language-info current-language-environment
1133 (run-hooks 'exit-language-environment-hook)
1134 (if (fboundp func) (funcall func))))
1135 (let ((default-eol-type (coding-system-eol-type
1136 default-buffer-file-coding-system)))
1137 (reset-language-environment)
1139 (setq current-language-environment language-name)
1140 (set-language-environment-coding-systems language-name default-eol-type))
1141 (let ((input-method (get-language-info language-name 'input-method)))
1143 (setq default-input-method input-method)
1144 (if input-method-history
1145 (setq input-method-history
1147 (delete input-method input-method-history))))))
1148 ;; (let ((nonascii (get-language-info language-name 'nonascii-translation))
1150 ;; (if (eq window-system 'pc)
1152 ;; (concat "cp" dos-codepage "-nonascii-translation-table")))))
1154 ;; ((char-table-p nonascii)
1155 ;; (setq nonascii-translation-table nonascii))
1156 ;; ((and (eq window-system 'pc) (boundp dos-table))
1157 ;; ;; DOS terminals' default is to use a special non-ASCII translation
1158 ;; ;; table as appropriate for the installed codepage.
1159 ;; (setq nonascii-translation-table (symbol-value dos-table)))
1160 ;; ((charsetp nonascii)
1161 ;; (setq nonascii-insert-offset (- (make-char nonascii) 128)))))
1163 ;; (setq charset-origin-alist
1164 ;; (get-language-info language-name 'charset-origin-alist))
1166 ;; Unibyte setups if necessary.
1167 ;; (unless default-enable-multibyte-characters
1168 ;; ;; Syntax and case table.
1169 ;; (let ((syntax (get-language-info language-name 'unibyte-syntax)))
1171 ;; (let ((set-case-syntax-set-multibyte nil))
1172 ;; (load syntax nil t))
1173 ;; ;; No information for syntax and case. Reset to the defaults.
1174 ;; (let ((syntax-table (standard-syntax-table))
1175 ;; (case-table (standard-case-table))
1176 ;; (ch (if (eq window-system 'pc) 128 160)))
1177 ;; (while (< ch 256)
1178 ;; (modify-syntax-entry ch " " syntax-table)
1179 ;; (aset case-table ch ch)
1180 ;; (setq ch (1+ ch)))
1181 ;; (set-char-table-extra-slot case-table 0 nil)
1182 ;; (set-char-table-extra-slot case-table 1 nil)
1183 ;; (set-char-table-extra-slot case-table 2 nil))
1184 ;; (set-standard-case-table (standard-case-table))
1185 ;; (let ((list (buffer-list)))
1187 ;; (with-current-buffer (car list)
1188 ;; (set-case-table (standard-case-table)))
1189 ;; (setq list (cdr list))))))
1190 ;; ;; Display table and coding system for terminal.
1191 ;; (let ((coding (get-language-info language-name 'unibyte-display)))
1193 ;; (standard-display-european-internal)
1194 ;; (standard-display-default (if (eq window-system 'pc) 128 160) 255)
1195 ;; (aset standard-display-table 146 nil))
1196 ;; (or (eq window-system 'pc)
1197 ;; (set-terminal-coding-system coding))))
1199 (let ((required-features (get-language-info language-name 'features)))
1200 (while required-features
1201 (require (car required-features))
1202 (setq required-features (cdr required-features))))
1203 (let ((func (get-language-info language-name 'setup-function)))
1206 (run-hooks 'set-language-environment-hook)
1207 (force-mode-line-update t))
1209 ;; (defun standard-display-european-internal ()
1210 ;; ;; Actually set up direct output of non-ASCII characters.
1211 ;; (standard-display-8bit (if (eq window-system 'pc) 128 160) 255)
1212 ;; ;; Unibyte Emacs on MS-DOS wants to display all 8-bit characters with
1213 ;; ;; the native font, and codes 160 and 146 stand for something very
1214 ;; ;; different there.
1215 ;; (or (and (eq window-system 'pc) (not default-enable-multibyte-characters))
1217 ;; ;; Make non-line-break space display as a plain space.
1218 ;; ;; Most X fonts do the wrong thing for code 160.
1219 ;; (aset standard-display-table 160 [32])
1220 ;; ;; Most Windows programs send out apostrophe's as \222. Most X fonts
1221 ;; ;; don't contain a character at that position. Map it to the ASCII
1223 ;; (aset standard-display-table 146 [39]))))
1225 (defun set-language-environment-coding-systems (language-name
1227 "Do various coding system setups for language environment LANGUAGE-NAME.
1229 The optional arg EOL-TYPE specifies the eol-type of the default value
1230 of buffer-file-coding-system set by this function."
1231 (let* ((priority (get-language-info language-name 'coding-priority))
1232 (default-coding (car priority)))
1234 (let ((categories (mapcar 'coding-system-category priority))
1235 category checked-categories)
1236 (set-default-coding-systems
1237 (if (memq eol-type '(lf crlf cr unix dos mac))
1238 (coding-system-change-eol-conversion default-coding eol-type)
1240 ;; (setq default-sendmail-coding-system default-coding)
1242 (unless (memq (setq category (car categories)) checked-categories)
1243 (set-coding-category-system category (car priority))
1244 (setq checked-categories (cons category checked-categories)))
1245 (setq priority (cdr priority)
1246 categories (cdr categories)))
1247 (set-coding-priority-list (nreverse checked-categories))
1248 ;; (update-coding-systems-internal)
1251 ;; Print all arguments with `princ', then print "\n".
1252 (defsubst princ-list (&rest args)
1253 (while args (princ (car args)) (setq args (cdr args)))
1256 (put 'describe-specified-language-support 'apropos-inhibit t)
1258 ;; Print a language specific information such as input methods,
1259 ;; charsets, and coding systems. This function is intended to be
1260 ;; called from the menu:
1261 ;; [menu-bar mule describe-language-environment LANGUAGE]
1262 ;; and should not run it by `M-x describe-current-input-method-function'.
1263 (defun describe-specified-language-support ()
1264 "Describe how Emacs supports the specified language environment."
1266 (let (language-name)
1267 (if (not (and (symbolp last-command-event)
1268 (setq language-name (symbol-name last-command-event))))
1269 (error "Bogus calling sequence"))
1270 (describe-language-environment language-name)))
1272 (defun describe-language-environment (language-name)
1273 "Describe how Emacs supports language environment LANGUAGE-NAME."
1275 (list (read-language-name
1277 "Describe language environment (default, current choice): ")))
1278 (if (null language-name)
1279 (setq language-name current-language-environment))
1280 (if (or (null language-name)
1281 (null (get-language-info language-name 'documentation)))
1282 (error "No documentation for the specified language"))
1283 (if (symbolp language-name)
1284 (setq language-name (symbol-name language-name)))
1285 (let ((doc (get-language-info language-name 'documentation)))
1286 (with-output-to-temp-buffer "*Help*"
1287 (princ-list language-name " language environment" "\n")
1292 (let ((str (get-language-info language-name 'sample-text)))
1295 (princ "Sample text:\n")
1296 (princ-list " " str)
1298 (let ((input-method (get-language-info language-name 'input-method))
1299 (l (copy-sequence input-method-alist)))
1300 (princ "Input methods")
1302 (princ (format " (default, %s)" input-method))
1303 (setq input-method (assoc input-method input-method-alist))
1304 (setq l (cons input-method (delete input-method l))))
1307 (if (string= language-name (nth 1 (car l)))
1308 (princ-list " " (car (car l))
1309 (format " (`%s' in mode line)" (nth 3 (car l)))))
1312 (princ "Character sets:\n")
1313 (let ((l (get-language-info language-name 'charset)))
1315 (princ-list " nothing specific to " language-name)
1317 (princ-list " " (car l) ": "
1318 (charset-description (car l)))
1321 (princ "Coding systems:\n")
1322 (let ((l (get-language-info language-name 'coding-system)))
1324 (princ-list " nothing specific to " language-name)
1326 (princ ; (format " %s (`%c' in mode line):\n\t%s\n"
1327 ;; In XEmacs, `coding-system-mnemonic' returns string.
1328 (format " %s (`%s' in mode line):\n\t%s\n"
1330 (coding-system-mnemonic (car l))
1331 (coding-system-doc-string (car l))))
1332 ;; (let ((aliases (coding-system-get (car l) 'alias-coding-systems)))
1335 ;; (princ (cons 'alias: (cdr aliases)))
1337 (setq l (cdr l))))))))
1339 ;;; Charset property
1341 ;; (defsubst get-charset-property (charset propname)
1342 ;; "Return the value of CHARSET's PROPNAME property.
1343 ;; This is the last value stored with
1344 ;; `(put-charset-property CHARSET PROPNAME VALUE)'."
1345 ;; (plist-get (charset-plist charset) propname))
1347 ;; (defsubst put-charset-property (charset propname value)
1348 ;; "Store CHARSETS's PROPNAME property with value VALUE.
1349 ;; It can be retrieved with `(get-charset-property CHARSET PROPNAME)'."
1350 ;; (set-charset-plist charset
1351 ;; (plist-put (charset-plist charset) propname value)))
1353 (defvar char-code-property-table
1354 (make-char-table 'generic)
1355 "Char-table containing a property list of each character code.
1357 See also the documentation of `get-char-code-property' and
1358 `put-char-code-property'")
1359 ;; (let ((plist (aref char-code-property-table char)))
1360 (defun get-char-code-property (char propname)
1361 "Return the value of CHAR's PROPNAME property in `char-code-property-table'."
1362 (let ((plist (get-char-table char char-code-property-table)))
1364 (car (cdr (memq propname plist))))))
1366 (defun put-char-code-property (char propname value)
1367 "Store CHAR's PROPNAME property with VALUE in `char-code-property-table'.
1368 It can be retrieved with `(get-char-code-property CHAR PROPNAME)'."
1369 (let ((plist (get-char-table char char-code-property-table)))
1371 (let ((slot (memq propname plist)))
1373 (setcar (cdr slot) value)
1374 (nconc plist (list propname value))))
1375 (put-char-table char (list propname value) char-code-property-table)
1379 ;; Pretty description of encoded string
1381 ;; Alist of ISO 2022 control code vs the corresponding mnemonic string.
1382 ;; (defvar iso-2022-control-alist
1383 ;; '((?\x1b . "ESC")
1388 ;; (?\x9b . "CSI")))
1390 ;; (defun encoded-string-description (str coding-system)
1391 ;; "Return a pretty description of STR that is encoded by CODING-SYSTEM."
1392 ;; (setq str (string-as-unibyte str))
1393 ;; (let ((char (aref str 0))
1395 ;; (when (< char 128)
1396 ;; (setq desc (or (cdr (assq char iso-2022-control-alist))
1397 ;; (char-to-string char)))
1399 ;; (len (length str)))
1401 ;; (setq char (aref str i))
1402 ;; (if (>= char 128)
1403 ;; (setq desc nil i len)
1404 ;; (setq desc (concat desc " "
1405 ;; (or (cdr (assq char iso-2022-control-alist))
1406 ;; (char-to-string char)))
1409 ;; (mapconcat (function (lambda (x) (format "0x%02x" x))) str " "))))
1411 ;; (defun encode-coding-char (char coding-system)
1412 ;; "Encode CHAR by CODING-SYSTEM and return the resulting string.
1413 ;; If CODING-SYSTEM can't safely encode CHAR, return nil."
1414 ;; (if (cmpcharp char)
1415 ;; (setq char (car (decompose-composite-char char 'list))))
1416 ;; (let ((str1 (char-to-string char))
1417 ;; (str2 (make-string 2 char))
1418 ;; (safe-charsets (and coding-system
1419 ;; (coding-system-get coding-system 'safe-charsets)))
1421 ;; (when (or (eq safe-charsets t)
1422 ;; (memq (char-charset char) safe-charsets))
1423 ;; ;; We must find the encoded string of CHAR. But, just encoding
1424 ;; ;; CHAR will put extra control sequences (usually to designate
1425 ;; ;; ASCII charaset) at the tail if type of CODING is ISO 2022.
1426 ;; ;; To exclude such tailing bytes, we at first encode one-char
1427 ;; ;; string and two-char string, then check how many bytes at the
1428 ;; ;; tail of both encoded strings are the same.
1430 ;; (setq enc1 (string-as-unibyte (encode-coding-string str1 coding-system))
1432 ;; enc2 (string-as-unibyte (encode-coding-string str2 coding-system))
1433 ;; i2 (length enc2))
1434 ;; (while (and (> i1 0) (= (aref enc1 (1- i1)) (aref enc2 (1- i2))))
1435 ;; (setq i1 (1- i1) i2 (1- i2)))
1437 ;; ;; Now (substring enc1 i1) and (substring enc2 i2) are the same,
1438 ;; ;; and they are the extra control sequences at the tail to
1440 ;; (substring enc2 0 i2))))
1443 ;;; mule-cmds.el ends here