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 `lf', `crlf', `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 symbol `unix', `dos' or `mac'.
82 They means `lf', `crlf', and `cr' 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 terminal output
155 o default coding system for keyboard input
156 o default coding system for subprocess I/O
157 o default coding system for converting file names."
158 (check-coding-system coding-system)
159 ;;(setq-default buffer-file-coding-system coding-system)
160 (set-default-buffer-file-coding-system coding-system)
161 ;; (if default-enable-multibyte-characters
162 ;; (setq default-file-name-coding-system coding-system))
163 ;; If coding-system is nil, honor that on MS-DOS as well, so
164 ;; that they could reset the terminal coding system.
165 ;; (unless (and (eq window-system 'pc) coding-system)
166 ;; (setq default-terminal-coding-system coding-system))
167 (setq terminal-coding-system coding-system)
168 ;;(setq default-keyboard-coding-system coding-system)
169 (setq keyboard-coding-system coding-system)
170 ;;(setq default-process-coding-system (cons coding-system coding-system))
171 (add-hook 'comint-exec-hook
173 (let ((proc (get-buffer-process (current-buffer))))
174 (set-process-input-coding-system proc ',coding-system)
175 (set-process-output-coding-system proc ',coding-system)))
177 (setq file-name-coding-system coding-system))
179 (defun prefer-coding-system (coding-system)
180 "Add CODING-SYSTEM at the front of the priority list for automatic detection.
181 This also sets the following coding systems:
182 o coding system of a newly created buffer
183 o default coding system for terminal output
184 o default coding system for keyboard input
185 o default coding system for converting file names.
187 If CODING-SYSTEM specifies a certain type of EOL conversion, the coding
188 systems set by this function will use that type of EOL conversion.
190 This command does not change the default value of terminal coding system
191 for MS-DOS terminal, because DOS terminals only support a single coding
192 system, and Emacs automatically sets the default to that coding system at
194 (interactive "zPrefer coding system: ")
195 (if (not (and coding-system (find-coding-system coding-system)))
196 (error "Invalid coding system `%s'" coding-system))
197 (let ((coding-category (coding-system-category coding-system))
198 (base (coding-system-base coding-system))
199 (eol-type (coding-system-eol-type coding-system)))
200 (if (not coding-category)
201 ;; CODING-SYSTEM is no-conversion or undecided.
202 (error "Can't prefer the coding system `%s'" coding-system))
203 (set-coding-category-system coding-category (or base coding-system))
204 ;; (update-coding-systems-internal)
205 (or (eq coding-category (car (coding-category-list)))
206 ;; We must change the order.
207 (set-coding-priority-list (list coding-category)))
208 (if (and base (interactive-p))
209 (message "Highest priority is set to %s (base of %s)"
211 ;; If they asked for specific EOL conversion, honor that.
212 (if (memq eol-type '(lf crlf mac))
214 (coding-system-change-eol-conversion base eol-type))
215 (setq coding-system base))
216 (set-default-coding-systems coding-system)))
218 ;; (defun find-coding-systems-region-subset-p (list1 list2)
219 ;; "Return non-nil if all elements in LIST1 are included in LIST2.
220 ;; Comparison done with EQ."
223 ;; (or (memq (car list1) list2)
225 ;; (setq list1 (cdr list1)))
228 ;; (defun find-coding-systems-region (from to)
229 ;; "Return a list of proper coding systems to encode a text between FROM and TO.
230 ;; All coding systems in the list can safely encode any multibyte characters
233 ;; If the text contains no multibyte characters, return a list of a single
234 ;; element `undecided'."
235 ;; (find-coding-systems-for-charsets (find-charset-region from to)))
237 ;; (defun find-coding-systems-string (string)
238 ;; "Return a list of proper coding systems to encode STRING.
239 ;; All coding systems in the list can safely encode any multibyte characters
242 ;; If STRING contains no multibyte characters, return a list of a single
243 ;; element `undecided'."
244 ;; (find-coding-systems-for-charsets (find-charset-string string)))
246 ;; (defun find-coding-systems-for-charsets (charsets)
247 ;; "Return a list of proper coding systems to encode characters of CHARSETS.
248 ;; CHARSETS is a list of character sets."
249 ;; (if (or (null charsets)
250 ;; (and (= (length charsets) 1)
251 ;; (eq 'ascii (car charsets))))
253 ;; (setq charsets (delq 'composition charsets))
254 ;; (let ((l (coding-system-list 'base-only))
255 ;; (charset-preferred-codings
258 ;; (if (eq x 'unknown)
260 ;; (get-charset-property x 'preferred-coding-system))))
262 ;; (priorities (mapcar (function (lambda (x) (symbol-value x)))
263 ;; coding-category-list))
264 ;; codings coding safe)
265 ;; (if (memq 'unknown charsets)
266 ;; ;; The region contains invalid multibyte characters.
267 ;; (setq l '(raw-text)))
269 ;; (setq coding (car l) l (cdr l))
270 ;; (if (and (setq safe (coding-system-get coding 'safe-charsets))
272 ;; (find-coding-systems-region-subset-p charsets safe)))
273 ;; ;; We put the higher priority to coding systems included
274 ;; ;; in CHARSET-PREFERRED-CODINGS, and within them, put the
275 ;; ;; higher priority to coding systems which support smaller
276 ;; ;; number of charsets.
278 ;; (+ (if (coding-system-get coding 'mime-charset) 4096 0)
279 ;; (lsh (length (memq coding priorities)) 7)
280 ;; (if (memq coding charset-preferred-codings) 64 0)
281 ;; (if (> (coding-system-type coding) 0) 32 0)
282 ;; (if (consp safe) (- 32 (length safe)) 0))))
283 ;; (setq codings (cons (cons priority coding) codings)))))
285 ;; (sort codings (function (lambda (x y) (> (car x) (car y))))))
288 ;; (defun find-multibyte-characters (from to &optional maxcount excludes)
289 ;; "Find multibyte characters in the region specified by FROM and TO.
290 ;; If FROM is a string, find multibyte characters in the string.
291 ;; The return value is an alist of the following format:
292 ;; ((CHARSET COUNT CHAR ...) ...)
294 ;; CHARSET is a character set,
295 ;; COUNT is a number of characters,
296 ;; CHARs are found characters of the character set.
297 ;; Optional 3rd arg MAXCOUNT limits how many CHARs are put in the above list.
298 ;; Optional 4th arg EXCLUDE is a list of character sets to be ignored.
300 ;; For invalid characters, CHARs are actually strings."
303 ;; (if (stringp from)
305 ;; (while (setq idx (string-match "[^\000-\177]" from idx))
306 ;; (setq char (aref from idx)
307 ;; charset (char-charset char))
308 ;; (if (eq charset 'unknown)
309 ;; (setq char (match-string 0)))
310 ;; (if (or (eq charset 'unknown)
311 ;; (not (or (eq excludes t) (memq charset excludes))))
312 ;; (let ((slot (assq charset chars)))
314 ;; (if (not (memq char (nthcdr 2 slot)))
315 ;; (let ((count (nth 1 slot)))
316 ;; (setcar (cdr slot) (1+ count))
317 ;; (if (or (not maxcount) (< count maxcount))
318 ;; (nconc slot (list char)))))
319 ;; (setq chars (cons (list charset 1 char) chars)))))
320 ;; (setq idx (1+ idx))))
323 ;; (while (re-search-forward "[^\000-\177]" to t)
324 ;; (setq char (preceding-char)
325 ;; charset (char-charset char))
326 ;; (if (eq charset 'unknown)
327 ;; (setq char (match-string 0)))
328 ;; (if (or (eq charset 'unknown)
329 ;; (not (or (eq excludes t) (memq charset excludes))))
330 ;; (let ((slot (assq charset chars)))
332 ;; (if (not (member char (nthcdr 2 slot)))
333 ;; (let ((count (nth 1 slot)))
334 ;; (setcar (cdr slot) (1+ count))
335 ;; (if (or (not maxcount) (< count maxcount))
336 ;; (nconc slot (list char)))))
337 ;; (setq chars (cons (list charset 1 char) chars))))))))
338 ;; (nreverse chars)))
340 ;; (defvar last-coding-system-specified nil
341 ;; "Most recent coding system explicitly specified by the user when asked.
342 ;; This variable is set whenever Emacs asks the user which coding system
343 ;; to use in order to write a file. If you set it to nil explicitly,
344 ;; then call `write-region', then afterward this variable will be non-nil
345 ;; only if the user was explicitly asked and specified a coding system.")
347 ;; (defun select-safe-coding-system (from to &optional default-coding-system)
348 ;; "Ask a user to select a safe coding system from candidates.
349 ;; The candidates of coding systems which can safely encode a text
350 ;; between FROM and TO are shown in a popup window.
352 ;; Optional arg DEFAULT-CODING-SYSTEM specifies a coding system to be
353 ;; checked at first. If omitted, buffer-file-coding-system of the
354 ;; current buffer is used.
356 ;; If the text can be encoded safely by DEFAULT-CODING-SYSTEM, it is
357 ;; returned without any user interaction.
359 ;; Kludgy feature: if FROM is a string, the string is the target text,
360 ;; and TO is ignored."
361 ;; (or default-coding-system
362 ;; (setq default-coding-system buffer-file-coding-system))
363 ;; (let* ((charsets (if (stringp from) (find-charset-string from)
364 ;; (find-charset-region from to)))
365 ;; (safe-coding-systems (find-coding-systems-for-charsets charsets)))
366 ;; (if (or (not enable-multibyte-characters)
367 ;; (eq (car safe-coding-systems) 'undecided)
368 ;; (eq default-coding-system 'no-conversion)
369 ;; (and default-coding-system
370 ;; (memq (coding-system-base default-coding-system)
371 ;; safe-coding-systems)))
372 ;; default-coding-system
374 ;; ;; At first, change each coding system to the corresponding
375 ;; ;; mime-charset name if it is also a coding system.
376 ;; (let ((l safe-coding-systems)
379 ;; (setq mime-charset (coding-system-get (car l) 'mime-charset))
380 ;; (if (and mime-charset (coding-system-p mime-charset))
381 ;; (setcar l mime-charset))
382 ;; (setq l (cdr l))))
384 ;; (let ((non-safe-chars (find-multibyte-characters
386 ;; (and default-coding-system
387 ;; (coding-system-get default-coding-system
388 ;; 'safe-charsets))))
389 ;; show-position overlays)
391 ;; ;; Highlight characters that default-coding-system can't encode.
392 ;; (when (integerp from)
394 ;; (let ((found nil))
395 ;; (while (and (not found)
396 ;; (re-search-forward "[^\000-\177]" to t))
397 ;; (setq found (assq (char-charset (preceding-char))
398 ;; non-safe-chars))))
400 ;; (setq show-position (point))
402 ;; (while (and (< (length overlays) 256)
403 ;; (re-search-forward "[^\000-\177]" to t))
404 ;; (let* ((char (preceding-char))
405 ;; (charset (char-charset char)))
406 ;; (when (assq charset non-safe-chars)
407 ;; (setq overlays (cons (make-overlay (1- (point)) (point))
409 ;; (overlay-put (car overlays) 'face 'highlight))))))
411 ;; ;; At last, ask a user to select a proper coding system.
413 ;; (save-window-excursion
414 ;; (when show-position
415 ;; ;; At first, be sure to show the current buffer.
416 ;; (set-window-buffer (selected-window) (current-buffer))
417 ;; (set-window-start (selected-window) show-position))
418 ;; ;; Then, show a helpful message.
419 ;; (with-output-to-temp-buffer "*Warning*"
421 ;; (set-buffer standard-output)
422 ;; (insert "The target text contains the following non ASCII character(s):\n")
423 ;; (let ((len (length non-safe-chars))
425 ;; (while (and non-safe-chars (< shown 3))
426 ;; (when (> (length (car non-safe-chars)) 2)
427 ;; (setq shown (1+ shown))
428 ;; (insert (format "%25s: " (car (car non-safe-chars))))
429 ;; (let ((l (nthcdr 2 (car non-safe-chars))))
431 ;; (if (or (stringp (car l)) (char-valid-p (car l)))
433 ;; (setq l (cdr l))))
434 ;; (if (> (nth 1 (car non-safe-chars)) 3)
437 ;; (setq non-safe-chars (cdr non-safe-chars)))
439 ;; (insert (format "%27s\n" "..."))))
440 ;; (insert (format "\
441 ;; These can't be encoded safely by the coding system %s.
443 ;; Please select one from the following safe coding systems:\n"
444 ;; default-coding-system))
445 ;; (let ((pos (point))
446 ;; (fill-prefix " "))
447 ;; (mapcar (function (lambda (x) (princ " ") (princ x)))
448 ;; safe-coding-systems)
449 ;; (fill-region-as-paragraph pos (point)))))
451 ;; ;; Read a coding system.
452 ;; (let* ((safe-names (mapcar (lambda (x) (list (symbol-name x)))
453 ;; safe-coding-systems))
454 ;; (name (completing-read
455 ;; (format "Select coding system (default %s): "
456 ;; (car safe-coding-systems))
457 ;; safe-names nil t nil nil
458 ;; (car (car safe-names)))))
459 ;; (setq last-coding-system-specified (intern name))
460 ;; (if (integerp (coding-system-eol-type default-coding-system))
461 ;; (setq last-coding-system-specified
462 ;; (coding-system-change-eol-conversion
463 ;; last-coding-system-specified
464 ;; (coding-system-eol-type default-coding-system))))
465 ;; last-coding-system-specified))
466 ;; (kill-buffer "*Warning*")
468 ;; (delete-overlay (car overlays))
469 ;; (setq overlays (cdr overlays)))))))))
471 ;; (setq select-safe-coding-system-function 'select-safe-coding-system)
473 ;; (defun select-message-coding-system ()
474 ;; "Return a coding system to encode the outgoing message of the current buffer.
475 ;; It at first tries the first coding system found in these variables
477 ;; (1) local value of `buffer-file-coding-system'
478 ;; (2) value of `sendmail-coding-system'
479 ;; (3) value of `default-buffer-file-coding-system'
480 ;; (4) value of `default-sendmail-coding-system'
481 ;; If the found coding system can't encode the current buffer,
482 ;; or none of them are bound to a coding system,
483 ;; it asks the user to select a proper coding system."
484 ;; (let ((coding (or (and (local-variable-p 'buffer-file-coding-system)
485 ;; buffer-file-coding-system)
486 ;; sendmail-coding-system
487 ;; default-buffer-file-coding-system
488 ;; default-sendmail-coding-system)))
489 ;; (if (eq coding 'no-conversion)
490 ;; ;; We should never use no-conversion for outgoing mails.
491 ;; (setq coding nil))
492 ;; (if (fboundp select-safe-coding-system-function)
493 ;; (funcall select-safe-coding-system-function
494 ;; (point-min) (point-max) coding)
497 ;;; Language support stuff.
499 (defvar language-info-alist nil
500 "Alist of language environment definitions.
501 Each element looks like:
502 (LANGUAGE-NAME . ((KEY . INFO) ...))
503 where LANGUAGE-NAME is a string, the name of the language environment,
504 KEY is a symbol denoting the kind of information, and
505 INFO is the data associated with KEY.
506 Meaningful values for KEY include
508 documentation value is documentation of what this language environment
509 is meant for, and how to use it.
510 charset value is a list of the character sets used by this
511 language environment.
512 sample-text value is one line of text,
513 written using those character sets,
514 appropriate for this language environment.
515 setup-function value is a function to call to switch to this
516 language environment.
517 exit-function value is a function to call to leave this
518 language environment.
519 coding-system value is a list of coding systems that are good
520 for saving text written in this language environment.
521 This list serves as suggestions to the user;
522 in effect, as a kind of documentation.
523 coding-priority value is a list of coding systems for this language
524 environment, in order of decreasing priority.
525 This is used to set up the coding system priority
526 list when you switch to this language environment.
527 input-method value is a default input method for this language
529 features value is a list of features requested in this
530 language environment.
531 tutorial value is a tutorial file name written in the language.")
533 (defun get-language-info (lang-env key)
534 "Return information listed under KEY for language environment LANG-ENV.
535 KEY is a symbol denoting the kind of information.
536 For a list of useful values for KEY and their meanings,
537 see `language-info-alist'."
538 (if (symbolp lang-env)
539 (setq lang-env (symbol-name lang-env)))
540 (let ((lang-slot (assoc-ignore-case lang-env language-info-alist)))
542 (cdr (assq key (cdr lang-slot))))))
544 (defun set-language-info (lang-env key info)
545 "Modify part of the definition of language environment LANG-ENV.
546 Specifically, this stores the information INFO under KEY
547 in the definition of this language environment.
548 KEY is a symbol denoting the kind of information.
549 INFO is the value for that information.
551 For a list of useful values for KEY and their meanings,
552 see `language-info-alist'."
553 (if (symbolp lang-env)
554 (setq lang-env (symbol-name lang-env)))
555 (let (lang-slot key-slot)
556 (setq lang-slot (assoc lang-env language-info-alist))
557 (if (null lang-slot) ; If no slot for the language, add it.
558 (setq lang-slot (list lang-env)
559 language-info-alist (cons lang-slot language-info-alist)))
560 (setq key-slot (assq key lang-slot))
561 (if (null key-slot) ; If no slot for the key, add it.
563 (setq key-slot (list key))
564 (setcdr lang-slot (cons key-slot (cdr lang-slot)))))
565 (setcdr key-slot info)))
567 (defun set-language-info-alist (lang-env alist &optional parents)
568 "Store ALIST as the definition of language environment LANG-ENV.
569 ALIST is an alist of KEY and INFO values. See the documentation of
570 `set-language-info' for the meanings of KEY and INFO."
571 (if (symbolp lang-env)
572 (setq lang-env (symbol-name lang-env)))
573 (let (; (describe-map describe-language-environment-map)
574 ; (setup-map setup-language-environment-map)
578 ;; map parent-symbol parent)
580 ;; (if (symbolp (setq parent-symbol (car l)))
581 ;; (setq parent (symbol-name parent))
582 ;; (setq parent parent-symbol parent-symbol (intern parent)))
583 ;; (setq map (lookup-key describe-map (vector parent-symbol)))
586 ;; (setq map (intern (format "describe-%s-environment-map"
587 ;; (downcase parent))))
588 ;; (define-prefix-command map)
589 ;; (define-key-after describe-map (vector parent-symbol)
590 ;; (cons parent map) t)))
591 ;; (setq describe-map (symbol-value map))
592 ;; (setq map (lookup-key setup-map (vector parent-symbol)))
595 ;; (setq map (intern (format "setup-%s-environment-map"
596 ;; (downcase parent))))
597 ;; (define-prefix-command map)
598 ;; (define-key-after setup-map (vector parent-symbol)
599 ;; (cons parent map) t)))
600 ;; (setq setup-map (symbol-value map))
601 ;; (setq l (cdr l)))))
603 ;; Set up menu items for this language env.
604 (let ((doc (assq 'documentation alist)))
606 ;; (define-key-after describe-map (vector (intern lang-env))
607 ;; (cons lang-env 'describe-specified-language-support) t)
608 (when (featurep 'menubar)
612 '("Mule" "Describe Language Support")
614 '(describe-language-environment ,lang-env)
617 ;; (define-key-after setup-map (vector (intern lang-env))
618 ;; (cons lang-env 'setup-specified-language-environment) t)
619 (when (featurep 'menubar)
623 '("Mule" "Set Language Environment")
625 '(set-language-environment ,lang-env)
629 (set-language-info lang-env (car (car alist)) (cdr (car alist)))
630 (setq alist (cdr alist)))))
632 (defun read-language-name (key prompt &optional default)
633 "Read a language environment name which has information for KEY.
634 If KEY is nil, read any language environment.
635 Prompt with PROMPT. DEFAULT is the default choice of language environment.
636 This returns a language environment name as a string."
637 (let* ((completion-ignore-case t)
638 (name (completing-read prompt
641 (function (lambda (elm) (assq key elm))))
643 (if (and (> (length name) 0)
645 (get-language-info name key)))
648 ;;; Multilingual input methods.
650 (defconst leim-list-file-name "leim-list.el"
651 "Name of LEIM list file.
652 This file contains a list of libraries of Emacs input methods (LEIM)
653 in the format of Lisp expression for registering each input method.
654 Emacs loads this file at startup time.")
656 (defvar leim-list-header (format
657 ";;; %s -- list of LEIM (Library of Emacs Input Method)
659 ;; This file contains a list of LEIM (Library of Emacs Input Method)
660 ;; in the same directory as this file. Loading this file registers
661 ;; the whole input methods in Emacs.
663 ;; Each entry has the form:
664 ;; (register-input-method
665 ;; INPUT-METHOD LANGUAGE-NAME ACTIVATE-FUNC
668 ;; See the function `register-input-method' for the meanings of arguments.
670 ;; If this directory is included in load-path, Emacs automatically
671 ;; loads this file at startup time.
675 "Header to be inserted in LEIM list file.")
677 (defvar leim-list-entry-regexp "^(register-input-method"
678 "Regexp matching head of each entry in LEIM list file.
679 See also the variable `leim-list-header'")
681 (defvar update-leim-list-functions
682 '(quail-update-leim-list-file)
683 "List of functions to call to update LEIM list file.
684 Each function is called with one arg, LEIM directory name.")
686 (defun update-leim-list-file (&rest dirs)
687 "Update LEIM list file in directories DIRS."
688 (let ((functions update-leim-list-functions))
690 (apply (car functions) dirs)
691 (setq functions (cdr functions)))))
693 (defvar current-input-method nil
694 "The current input method for multilingual text.
695 If nil, that means no input method is activated now.")
696 (make-variable-buffer-local 'current-input-method)
697 (put 'current-input-method 'permanent-local t)
699 (defvar current-input-method-title nil
700 "Title string of the current input method shown in mode line.")
701 (make-variable-buffer-local 'current-input-method-title)
702 (put 'current-input-method-title 'permanent-local t)
704 (defcustom default-input-method nil
705 "*Default input method for multilingual text (a string).
706 This is the input method activated automatically by the command
707 `toggle-input-method' (\\[toggle-input-method])."
709 :type '(choice (const nil) string))
711 (put 'input-method-function 'permanent-local t)
713 (defvar input-method-history nil
714 "History list for some commands that read input methods.")
715 (make-variable-buffer-local 'input-method-history)
716 (put 'input-method-history 'permanent-local t)
718 (defvar inactivate-current-input-method-function nil
719 "Function to call for inactivating the current input method.
720 Every input method should set this to an appropriate value when activated.
721 This function is called with no argument.
723 This function should never change the value of `current-input-method'.
724 It is set to nil by the function `inactivate-input-method'.")
725 (make-variable-buffer-local 'inactivate-current-input-method-function)
726 (put 'inactivate-current-input-method-function 'permanent-local t)
728 (defvar describe-current-input-method-function nil
729 "Function to call for describing the current input method.
730 This function is called with no argument.")
731 (make-variable-buffer-local 'describe-current-input-method-function)
732 (put 'describe-current-input-method-function 'permanent-local t)
734 (defvar input-method-alist nil
735 "Alist of input method names vs how to use them.
736 Each element has the form:
737 (INPUT-METHOD LANGUAGE-ENV ACTIVATE-FUNC TITLE DESCRIPTION ARGS...)
738 See the function `register-input-method' for the meanings of the elements.")
740 (defun register-input-method (input-method lang-env &rest args)
741 "Register INPUT-METHOD as an input method for language environment ENV.
742 INPUT-METHOD and LANG-ENV are symbols or strings.
744 The remaining arguments are:
745 ACTIVATE-FUNC, TITLE, DESCRIPTION, and ARGS...
746 ACTIVATE-FUNC is a function to call to activate this method.
747 TITLE is a string to show in the mode line when this method is active.
748 DESCRIPTION is a string describing this method and what it is good for.
749 The ARGS, if any, are passed as arguments to ACTIVATE-FUNC.
750 All told, the arguments to ACTIVATE-FUNC are INPUT-METHOD and the ARGS.
752 This function is mainly used in the file \"leim-list.el\" which is
753 created at building time of emacs, registering all quail input methods
754 contained in the emacs distribution.
756 In case you want to register a new quail input method by yourself, be
757 careful to use the same input method title as given in the third
758 parameter of `quail-define-package' (if the values are different, the
759 string specified in this function takes precedence).
761 The commands `describe-input-method' and `list-input-methods' need
762 this duplicated values to show some information about input methods
763 without loading the affected quail packages."
764 (if (symbolp lang-env)
765 (setq lang-env (symbol-name lang-env)))
766 (if (symbolp input-method)
767 (setq input-method (symbol-name input-method)))
768 (let ((info (cons lang-env args))
769 (slot (assoc input-method input-method-alist)))
772 (setq slot (cons input-method info))
773 (setq input-method-alist (cons slot input-method-alist)))))
775 (defun read-input-method-name (prompt &optional default inhibit-null)
776 "Read a name of input method from a minibuffer prompting with PROMPT.
777 If DEFAULT is non-nil, use that as the default,
778 and substitute it into PROMPT at the first `%s'.
779 If INHIBIT-NULL is non-nil, null input signals an error.
781 The return value is a string."
783 (setq prompt (format prompt default)))
784 (let* ((completion-ignore-case t)
785 ;; This binding is necessary because input-method-history is
787 (input-method (completing-read prompt input-method-alist
788 nil t nil 'input-method-history
790 (if (> (length input-method) 0)
793 (error "No valid input method is specified")))))
795 (defun activate-input-method (input-method)
796 "Switch to input method INPUT-METHOD for the current buffer.
797 If some other input method is already active, turn it off first.
798 If INPUT-METHOD is nil, deactivate any current input method."
799 (if (and input-method (symbolp input-method))
800 (setq input-method (symbol-name input-method)))
801 (if (and current-input-method
802 (not (string= current-input-method input-method)))
803 (inactivate-input-method))
804 (unless (or current-input-method (null input-method))
805 (let ((slot (assoc input-method input-method-alist)))
807 (error "Can't activate input method `%s'" input-method))
808 (let ((func (nth 2 slot)))
810 (apply (nth 2 slot) input-method (nthcdr 5 slot))
811 (if (and (consp func) (symbolp (car func)) (symbolp (cdr func)))
814 (apply (car func) input-method (nthcdr 5 slot)))
815 (error "Can't activate input method `%s'" input-method))))
816 (setq current-input-method input-method)
817 (setq current-input-method-title (nth 3 slot))
819 (run-hooks 'input-method-activate-hook)
820 (force-mode-line-update)))))
822 (defun inactivate-input-method ()
823 "Turn off the current input method."
824 (when current-input-method
825 (if input-method-history
826 (unless (string= current-input-method (car input-method-history))
827 (setq input-method-history
828 (cons current-input-method
829 (delete current-input-method input-method-history))))
830 (setq input-method-history (list current-input-method)))
832 (funcall inactivate-current-input-method-function)
834 (run-hooks 'input-method-inactivate-hook)
835 (setq current-input-method nil
836 current-input-method-title nil)
837 (force-mode-line-update)))))
839 (defun set-input-method (input-method)
840 "Select and activate input method INPUT-METHOD for the current buffer.
841 This also sets the default input method to the one you specify."
843 (let* ((default (or (car input-method-history) default-input-method)))
844 (list (read-input-method-name
845 (if default "Select input method (default %s): " "Select input method: ")
847 (activate-input-method input-method)
848 (setq default-input-method input-method))
850 (defun toggle-input-method (&optional arg)
851 "Turn on or off a multilingual text input method for the current buffer.
853 With no prefix argument, if an input method is currently activated,
854 turn it off. Otherwise, activate an input method -- the one most
855 recently used, or the one specified in `default-input-method', or
856 the one read from the minibuffer.
858 With a prefix argument, read an input method from the minibuffer and
861 The default is to use the most recent input method specified
862 \(not including the currently active input method, if any)."
864 (if (and current-input-method (not arg))
865 (inactivate-input-method)
866 (let ((default (or (car input-method-history) default-input-method)))
867 (if (and arg default (equal current-input-method default)
868 (> (length input-method-history) 1))
869 (setq default (nth 1 input-method-history)))
870 (activate-input-method
871 (if (or arg (not default))
873 (read-input-method-name
874 (if default "Input method (default %s): " "Input method: " )
877 (or default-input-method
878 (setq default-input-method current-input-method)))))
880 (defun describe-input-method (input-method)
881 "Describe input method INPUT-METHOD."
883 (list (read-input-method-name
884 "Describe input method (default, current choice): ")))
885 (if (and input-method (symbolp input-method))
886 (setq input-method (symbol-name input-method)))
887 (if (null input-method)
888 (describe-current-input-method)
889 (with-output-to-temp-buffer "*Help*"
890 (let ((elt (assoc input-method input-method-alist)))
891 (princ (format "Input method: %s (`%s' in mode line) for %s\n %s\n"
892 input-method (nth 3 elt) (nth 1 elt) (nth 4 elt)))))))
894 (defun describe-current-input-method ()
895 "Describe the input method currently in use."
896 (if current-input-method
897 (if (and (symbolp describe-current-input-method-function)
898 (fboundp describe-current-input-method-function))
899 (funcall describe-current-input-method-function)
900 (message "No way to describe the current input method `%s'"
901 current-input-method)
903 (error "No input method is activated now")))
905 (defun read-multilingual-string (prompt &optional initial-input input-method)
906 "Read a multilingual string from minibuffer, prompting with string PROMPT.
907 The input method selected last time is activated in minibuffer.
908 If optional second arg INITIAL-INPUT is non-nil, insert it in the minibuffer
910 Optional 3rd argument INPUT-METHOD specifies the input method
911 to be activated instead of the one selected last time. It is a symbol
917 (read-input-method-name "Input method: " nil t)))
918 (if (and input-method (symbolp input-method))
919 (setq input-method (symbol-name input-method)))
920 (let ((prev-input-method current-input-method))
923 (activate-input-method input-method)
925 ;; (read-string prompt initial-input nil nil t)
926 (read-string prompt initial-input nil))
927 (activate-input-method prev-input-method))))
929 ;; Variables to control behavior of input methods. All input methods
930 ;; should react to these variables.
932 (defcustom input-method-verbose-flag 'default
933 "*A flag to control extra guidance given by input methods.
934 The value should be nil, t, `complex-only', or `default'.
936 The extra guidance is done by showing list of available keys in echo
937 area. When you use the input method in the minibuffer, the guidance
938 is shown at the bottom short window (split from the existing window).
940 If the value is t, extra guidance is always given, if the value is
941 nil, extra guidance is always suppressed.
943 If the value is `complex-only', only complex input methods such as
944 `chinese-py' and `japanese' give extra guidance.
946 If the value is `default', complex input methods always give extra
947 guidance, but simple input methods give it only when you are not in
950 See also the variable `input-method-highlight-flag'."
951 :type '(choice (const t) (const nil) (const complex-only) (const default))
954 (defcustom input-method-highlight-flag t
955 "*If this flag is non-nil, input methods highlight partially-entered text.
956 For instance, while you are in the middle of a Quail input method sequence,
957 the text inserted so far is temporarily underlined.
958 The underlining goes away when you finish or abort the input method sequence.
959 See also the variable `input-method-verbose-flag'."
963 (defvar input-method-activate-hook nil
964 "Normal hook run just after an input method is activated.
966 The variable `current-input-method' keeps the input method name
969 (defvar input-method-inactivate-hook nil
970 "Normal hook run just after an input method is inactivated.
972 The variable `current-input-method' still keeps the input method name
975 (defvar input-method-after-insert-chunk-hook nil
976 "Normal hook run just after an input method insert some chunk of text.")
978 (defvar input-method-exit-on-first-char nil
979 "This flag controls a timing when an input method returns.
980 Usually, the input method does not return while there's a possibility
981 that it may find a different translation if a user types another key.
982 But, it this flag is non-nil, the input method returns as soon as
983 the current key sequence gets long enough to have some valid translation.")
985 (defvar input-method-use-echo-area nil
986 "This flag controls how an input method shows an intermediate key sequence.
987 Usually, the input method inserts the intermediate key sequence,
988 or candidate translations corresponding to the sequence,
989 at point in the current buffer.
990 But, if this flag is non-nil, it displays them in echo area instead.")
992 (defvar input-method-exit-on-invalid-key nil
993 "This flag controls the behaviour of an input method on invalid key input.
994 Usually, when a user types a key which doesn't start any character
995 handled by the input method, the key is handled by turning off the
996 input method temporarily. After that key, the input method is re-enabled.
997 But, if this flag is non-nil, the input method is never back on.")
1000 (defvar set-language-environment-hook nil
1001 "Normal hook run after some language environment is set.
1003 When you set some hook function here, that effect usually should not
1004 be inherited to another language environment. So, you had better set
1005 another function in `exit-language-environment-hook' (which see) to
1006 cancel the effect.")
1008 (defvar exit-language-environment-hook nil
1009 "Normal hook run after exiting from some language environment.
1010 When this hook is run, the variable `current-language-environment'
1011 is still bound to the language environment being exited.
1013 This hook is mainly used for canceling the effect of
1014 `set-language-environment-hook' (which-see).")
1016 (put 'setup-specified-language-environment 'apropos-inhibit t)
1018 (defun setup-specified-language-environment ()
1019 "Switch to a specified language environment."
1021 (let (language-name)
1022 (if (and (symbolp last-command-event)
1023 (or (not (eq last-command-event 'Default))
1024 (setq last-command-event 'English))
1025 (setq language-name (symbol-name last-command-event)))
1026 (set-language-environment language-name)
1027 (error "Bogus calling sequence"))))
1029 (defcustom current-language-environment "English"
1030 "The last language environment specified with `set-language-environment'.
1031 This variable should be set only with \\[customize], which is equivalent
1032 to using the function `set-language-environment'."
1033 :link '(custom-manual "(emacs)Language Environments")
1034 :set (lambda (symbol value) (set-language-environment value))
1036 (or (car-safe (assoc-ignore-case
1037 (if (symbolp current-language-environment)
1038 (symbol-name current-language-environment)
1039 current-language-environment)
1040 language-info-alist))
1042 :type (cons 'choice (mapcar (lambda (lang)
1043 (list 'const (car lang)))
1044 language-info-alist))
1045 :initialize 'custom-initialize-default
1049 (defun reset-language-environment ()
1050 "Reset multilingual environment of Emacs to the default status.
1052 The default status is as follows:
1054 The default value of buffer-file-coding-system is nil.
1055 The default coding system for process I/O is nil.
1056 The default value for the command `set-terminal-coding-system' is nil.
1057 The default value for the command `set-keyboard-coding-system' is nil.
1059 The order of priorities of coding categories and the coding system
1060 bound to each category are as follows
1061 coding category coding system
1062 --------------------------------------------------
1066 iso-lock-shift iso-2022-lock
1067 iso-8-designate iso-2022-8bit-ss2
1068 no-conversion raw-text
1075 ;; This function formerly set default-enable-multibyte-characters to t,
1076 ;; but that is incorrect. It should not alter the unibyte/multibyte choice.
1078 (set-coding-category-system 'iso-7 'iso-2022-7bit)
1079 (set-coding-category-system 'iso-8-1 'iso-8859-1)
1080 (set-coding-category-system 'iso-8-2 'iso-8859-1)
1081 (set-coding-category-system 'iso-lock-shift 'iso-2022-lock)
1082 (set-coding-category-system 'iso-8-designate 'iso-2022-8bit-ss2)
1083 (set-coding-category-system 'no-conversion 'raw-text)
1084 (set-coding-category-system 'shift-jis 'shift_jis)
1085 (set-coding-category-system 'big5 'big5)
1086 (cond ((eq (coding-system-type (coding-category-system 'utf-8)) 'utf-8)
1087 (set-coding-category-system 'ucs-4 'iso-10646-ucs-4)
1088 (set-coding-category-system 'utf-8 'utf-8)
1089 (set-coding-priority-list
1102 (set-coding-priority-list
1113 ;; (update-coding-systems-internal)
1115 (set-default-coding-systems nil)
1116 ;; Don't alter the terminal and keyboard coding systems here.
1117 ;; The terminal still supports the same coding system
1118 ;; that it supported a minute ago.
1119 ;;; (set-terminal-coding-system-internal nil)
1120 ;;; (set-keyboard-coding-system-internal nil)
1122 ;; (setq nonascii-translation-table nil
1123 ;; nonascii-insert-offset 0)
1126 (defun set-language-environment (language-name)
1127 "Set up multi-lingual environment for using LANGUAGE-NAME.
1128 This sets the coding system priority and the default input method
1129 and sometimes other things. LANGUAGE-NAME should be a string
1130 which is the name of a language environment. For example, \"Latin-1\"
1131 specifies the character set for the major languages of Western Europe."
1132 (interactive (list (read-language-name
1134 "Set language environment (default, English): ")))
1136 (if (symbolp language-name)
1137 (setq language-name (symbol-name language-name)))
1138 (setq language-name "English"))
1139 (or (assoc-ignore-case language-name language-info-alist)
1140 (error "Language environment not defined: %S" language-name))
1141 (if current-language-environment
1142 (let ((func (get-language-info current-language-environment
1144 (run-hooks 'exit-language-environment-hook)
1145 (if (fboundp func) (funcall func))))
1146 (let ((default-eol-type (coding-system-eol-type
1147 default-buffer-file-coding-system)))
1148 (reset-language-environment)
1150 (setq current-language-environment language-name)
1151 (set-language-environment-coding-systems language-name default-eol-type))
1152 (let ((input-method (get-language-info language-name 'input-method)))
1154 (setq default-input-method input-method)
1155 (if input-method-history
1156 (setq input-method-history
1158 (delete input-method input-method-history))))))
1159 ;; (let ((nonascii (get-language-info language-name 'nonascii-translation))
1161 ;; (if (eq window-system 'pc)
1163 ;; (concat "cp" dos-codepage "-nonascii-translation-table")))))
1165 ;; ((char-table-p nonascii)
1166 ;; (setq nonascii-translation-table nonascii))
1167 ;; ((and (eq window-system 'pc) (boundp dos-table))
1168 ;; ;; DOS terminals' default is to use a special non-ASCII translation
1169 ;; ;; table as appropriate for the installed codepage.
1170 ;; (setq nonascii-translation-table (symbol-value dos-table)))
1171 ;; ((charsetp nonascii)
1172 ;; (setq nonascii-insert-offset (- (make-char nonascii) 128)))))
1174 ;; (setq charset-origin-alist
1175 ;; (get-language-info language-name 'charset-origin-alist))
1177 ;; Unibyte setups if necessary.
1178 ;; (unless default-enable-multibyte-characters
1179 ;; ;; Syntax and case table.
1180 ;; (let ((syntax (get-language-info language-name 'unibyte-syntax)))
1182 ;; (let ((set-case-syntax-set-multibyte nil))
1183 ;; (load syntax nil t))
1184 ;; ;; No information for syntax and case. Reset to the defaults.
1185 ;; (let ((syntax-table (standard-syntax-table))
1186 ;; (case-table (standard-case-table))
1187 ;; (ch (if (eq window-system 'pc) 128 160)))
1188 ;; (while (< ch 256)
1189 ;; (modify-syntax-entry ch " " syntax-table)
1190 ;; (aset case-table ch ch)
1191 ;; (setq ch (1+ ch)))
1192 ;; (set-char-table-extra-slot case-table 0 nil)
1193 ;; (set-char-table-extra-slot case-table 1 nil)
1194 ;; (set-char-table-extra-slot case-table 2 nil))
1195 ;; (set-standard-case-table (standard-case-table))
1196 ;; (let ((list (buffer-list)))
1198 ;; (with-current-buffer (car list)
1199 ;; (set-case-table (standard-case-table)))
1200 ;; (setq list (cdr list))))))
1201 ;; ;; Display table and coding system for terminal.
1202 ;; (let ((coding (get-language-info language-name 'unibyte-display)))
1204 ;; (standard-display-european-internal)
1205 ;; (standard-display-default (if (eq window-system 'pc) 128 160) 255)
1206 ;; (aset standard-display-table 146 nil))
1207 ;; (or (eq window-system 'pc)
1208 ;; (set-terminal-coding-system coding))))
1210 (let ((required-features (get-language-info language-name 'features)))
1211 (while required-features
1212 (require (car required-features))
1213 (setq required-features (cdr required-features))))
1214 (let ((func (get-language-info language-name 'setup-function)))
1217 (run-hooks 'set-language-environment-hook)
1218 (force-mode-line-update t))
1220 ;; (defun standard-display-european-internal ()
1221 ;; ;; Actually set up direct output of non-ASCII characters.
1222 ;; (standard-display-8bit (if (eq window-system 'pc) 128 160) 255)
1223 ;; ;; Unibyte Emacs on MS-DOS wants to display all 8-bit characters with
1224 ;; ;; the native font, and codes 160 and 146 stand for something very
1225 ;; ;; different there.
1226 ;; (or (and (eq window-system 'pc) (not default-enable-multibyte-characters))
1228 ;; ;; Make non-line-break space display as a plain space.
1229 ;; ;; Most X fonts do the wrong thing for code 160.
1230 ;; (aset standard-display-table 160 [32])
1231 ;; ;; Most Windows programs send out apostrophe's as \222. Most X fonts
1232 ;; ;; don't contain a character at that position. Map it to the ASCII
1234 ;; (aset standard-display-table 146 [39]))))
1236 (defun set-language-environment-coding-systems (language-name
1238 "Do various coding system setups for language environment LANGUAGE-NAME.
1240 The optional arg EOL-TYPE specifies the eol-type of the default value
1241 of buffer-file-coding-system set by this function."
1242 (let* ((priority (get-language-info language-name 'coding-priority))
1243 (default-coding (car priority)))
1245 (let ((categories (mapcar 'coding-system-category priority))
1246 category checked-categories)
1247 (set-default-coding-systems
1248 (if (memq eol-type '(lf crlf cr unix dos mac))
1249 (coding-system-change-eol-conversion default-coding eol-type)
1251 ;; (setq default-sendmail-coding-system default-coding)
1253 (unless (memq (setq category (car categories)) checked-categories)
1254 (set-coding-category-system category (car priority))
1255 (setq checked-categories (cons category checked-categories)))
1256 (setq priority (cdr priority)
1257 categories (cdr categories)))
1258 (set-coding-priority-list (nreverse checked-categories))
1259 ;; (update-coding-systems-internal)
1262 ;; Print all arguments with `princ', then print "\n".
1263 (defsubst princ-list (&rest args)
1264 (while args (princ (car args)) (setq args (cdr args)))
1267 (put 'describe-specified-language-support 'apropos-inhibit t)
1269 ;; Print a language specific information such as input methods,
1270 ;; charsets, and coding systems. This function is intended to be
1271 ;; called from the menu:
1272 ;; [menu-bar mule describe-language-environment LANGUAGE]
1273 ;; and should not run it by `M-x describe-current-input-method-function'.
1274 (defun describe-specified-language-support ()
1275 "Describe how Emacs supports the specified language environment."
1277 (let (language-name)
1278 (if (not (and (symbolp last-command-event)
1279 (setq language-name (symbol-name last-command-event))))
1280 (error "Bogus calling sequence"))
1281 (describe-language-environment language-name)))
1283 (defun describe-language-environment (language-name)
1284 "Describe how Emacs supports language environment LANGUAGE-NAME."
1286 (list (read-language-name
1288 "Describe language environment (default, current choice): ")))
1289 (if (null language-name)
1290 (setq language-name current-language-environment))
1291 (if (or (null language-name)
1292 (null (get-language-info language-name 'documentation)))
1293 (error "No documentation for the specified language"))
1294 (if (symbolp language-name)
1295 (setq language-name (symbol-name language-name)))
1296 (let ((doc (get-language-info language-name 'documentation)))
1297 (with-output-to-temp-buffer "*Help*"
1298 (princ-list language-name " language environment" "\n")
1303 (let ((str (get-language-info language-name 'sample-text)))
1306 (princ "Sample text:\n")
1307 (princ-list " " str)
1309 (let ((input-method (get-language-info language-name 'input-method))
1310 (l (copy-sequence input-method-alist)))
1311 (princ "Input methods")
1313 (princ (format " (default, %s)" input-method))
1314 (setq input-method (assoc input-method input-method-alist))
1315 (setq l (cons input-method (delete input-method l))))
1318 (if (string= language-name (nth 1 (car l)))
1319 (princ-list " " (car (car l))
1320 (format " (`%s' in mode line)" (nth 3 (car l)))))
1323 (princ "Character sets:\n")
1324 (let ((l (get-language-info language-name 'charset)))
1326 (princ-list " nothing specific to " language-name)
1328 (princ-list " " (car l) ": "
1329 (charset-description (car l)))
1332 (princ "Coding systems:\n")
1333 (let ((l (get-language-info language-name 'coding-system)))
1335 (princ-list " nothing specific to " language-name)
1337 (princ ; (format " %s (`%c' in mode line):\n\t%s\n"
1338 ;; In XEmacs, `coding-system-mnemonic' returns string.
1339 (format " %s (`%s' in mode line):\n\t%s\n"
1341 (coding-system-mnemonic (car l))
1342 (coding-system-doc-string (car l))))
1343 ;; (let ((aliases (coding-system-get (car l) 'alias-coding-systems)))
1346 ;; (princ (cons 'alias: (cdr aliases)))
1348 (setq l (cdr l))))))))
1350 ;;; Charset property
1352 ;; (defsubst get-charset-property (charset propname)
1353 ;; "Return the value of CHARSET's PROPNAME property.
1354 ;; This is the last value stored with
1355 ;; `(put-charset-property CHARSET PROPNAME VALUE)'."
1356 ;; (plist-get (charset-plist charset) propname))
1358 ;; (defsubst put-charset-property (charset propname value)
1359 ;; "Store CHARSETS's PROPNAME property with value VALUE.
1360 ;; It can be retrieved with `(get-charset-property CHARSET PROPNAME)'."
1361 ;; (set-charset-plist charset
1362 ;; (plist-put (charset-plist charset) propname value)))
1364 (defvar char-code-property-table
1365 (make-char-table 'generic)
1366 "Char-table containing a property list of each character code.
1368 See also the documentation of `get-char-code-property' and
1369 `put-char-code-property'")
1370 ;; (let ((plist (aref char-code-property-table char)))
1371 (defun get-char-code-property (char propname)
1372 "Return the value of CHAR's PROPNAME property in `char-code-property-table'."
1373 (let ((plist (get-char-table char char-code-property-table)))
1375 (car (cdr (memq propname plist))))))
1377 (defun put-char-code-property (char propname value)
1378 "Store CHAR's PROPNAME property with VALUE in `char-code-property-table'.
1379 It can be retrieved with `(get-char-code-property CHAR PROPNAME)'."
1380 (let ((plist (get-char-table char char-code-property-table)))
1382 (let ((slot (memq propname plist)))
1384 (setcar (cdr slot) value)
1385 (nconc plist (list propname value))))
1386 (put-char-table char (list propname value) char-code-property-table)
1390 ;; Pretty description of encoded string
1392 ;; Alist of ISO 2022 control code vs the corresponding mnemonic string.
1393 ;; (defvar iso-2022-control-alist
1394 ;; '((?\x1b . "ESC")
1399 ;; (?\x9b . "CSI")))
1401 ;; (defun encoded-string-description (str coding-system)
1402 ;; "Return a pretty description of STR that is encoded by CODING-SYSTEM."
1403 ;; (setq str (string-as-unibyte str))
1404 ;; (let ((char (aref str 0))
1406 ;; (when (< char 128)
1407 ;; (setq desc (or (cdr (assq char iso-2022-control-alist))
1408 ;; (char-to-string char)))
1410 ;; (len (length str)))
1412 ;; (setq char (aref str i))
1413 ;; (if (>= char 128)
1414 ;; (setq desc nil i len)
1415 ;; (setq desc (concat desc " "
1416 ;; (or (cdr (assq char iso-2022-control-alist))
1417 ;; (char-to-string char)))
1420 ;; (mapconcat (function (lambda (x) (format "0x%02x" x))) str " "))))
1422 ;; (defun encode-coding-char (char coding-system)
1423 ;; "Encode CHAR by CODING-SYSTEM and return the resulting string.
1424 ;; If CODING-SYSTEM can't safely encode CHAR, return nil."
1425 ;; (if (cmpcharp char)
1426 ;; (setq char (car (decompose-composite-char char 'list))))
1427 ;; (let ((str1 (char-to-string char))
1428 ;; (str2 (make-string 2 char))
1429 ;; (safe-charsets (and coding-system
1430 ;; (coding-system-get coding-system 'safe-charsets)))
1432 ;; (when (or (eq safe-charsets t)
1433 ;; (memq (char-charset char) safe-charsets))
1434 ;; ;; We must find the encoded string of CHAR. But, just encoding
1435 ;; ;; CHAR will put extra control sequences (usually to designate
1436 ;; ;; ASCII charaset) at the tail if type of CODING is ISO 2022.
1437 ;; ;; To exclude such tailing bytes, we at first encode one-char
1438 ;; ;; string and two-char string, then check how many bytes at the
1439 ;; ;; tail of both encoded strings are the same.
1441 ;; (setq enc1 (string-as-unibyte (encode-coding-string str1 coding-system))
1443 ;; enc2 (string-as-unibyte (encode-coding-string str2 coding-system))
1444 ;; i2 (length enc2))
1445 ;; (while (and (> i1 0) (= (aref enc1 (1- i1)) (aref enc2 (1- i2))))
1446 ;; (setq i1 (1- i1) i2 (1- i2)))
1448 ;; ;; Now (substring enc1 i1) and (substring enc2 i2) are the same,
1449 ;; ;; and they are the extra control sequences at the tail to
1451 ;; (substring enc2 0 i2))))
1454 ;;; mule-cmds.el ends here