1 ;;; mule-cmds.el --- commands for mulitilingual environment -*-coding: iso-2022-7bit -*-
3 ;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 ;; Free Software Foundation, Inc.
5 ;; Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
6 ;; National Institute of Advanced Industrial Science and Technology (AIST)
7 ;; Registration Number H14PRO021
9 ;; Keywords: mule, multilingual
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 2, or (at your option)
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
26 ;; Boston, MA 02110-1301, USA.
34 (autoload 'widget-value
"wid-edit"))
36 (defvar mac-system-coding-system
)
37 (defvar mac-system-locale
)
39 ;;; MULE related key bindings and menus.
41 (defvar mule-keymap
(make-sparse-keymap)
42 "Keymap for Mule (Multilingual environment) specific commands.")
44 ;; Keep "C-x C-m ..." for mule specific commands.
45 (define-key ctl-x-map
"\C-m" mule-keymap
)
47 (define-key mule-keymap
"f" 'set-buffer-file-coding-system
)
48 (define-key mule-keymap
"r" 'revert-buffer-with-coding-system
)
49 (define-key mule-keymap
"F" 'set-file-name-coding-system
)
50 (define-key mule-keymap
"t" 'set-terminal-coding-system
)
51 (define-key mule-keymap
"k" 'set-keyboard-coding-system
)
52 (define-key mule-keymap
"p" 'set-buffer-process-coding-system
)
53 (define-key mule-keymap
"x" 'set-selection-coding-system
)
54 (define-key mule-keymap
"X" 'set-next-selection-coding-system
)
55 (define-key mule-keymap
"\C-\\" 'set-input-method
)
56 (define-key mule-keymap
"c" 'universal-coding-system-argument
)
57 (define-key mule-keymap
"l" 'set-language-environment
)
59 (defvar mule-menu-keymap
60 (make-sparse-keymap "Mule (Multilingual Environment)")
61 "Keymap for Mule (Multilingual environment) menu specific commands.")
63 (defvar describe-language-environment-map
64 (make-sparse-keymap "Describe Language Environment"))
66 (defvar setup-language-environment-map
67 (make-sparse-keymap "Set Language Environment"))
69 (defvar set-coding-system-map
70 (make-sparse-keymap "Set Coding System"))
72 (define-key-after mule-menu-keymap
[set-language-environment
]
73 (list 'menu-item
"Set Language Environment" setup-language-environment-map
74 :help
"Multilingual environment suitable for a specific language"))
75 (define-key-after mule-menu-keymap
[separator-mule
]
78 (define-key-after mule-menu-keymap
[toggle-input-method
]
79 '(menu-item "Toggle Input Method" toggle-input-method
)
81 (define-key-after mule-menu-keymap
[set-input-method
]
82 '(menu-item "Select Input Method..." set-input-method
)
84 (define-key-after mule-menu-keymap
[describe-input-method
]
85 '(menu-item "Describe Input Method" describe-input-method
))
86 (define-key-after mule-menu-keymap
[separator-input-method
]
89 (define-key-after mule-menu-keymap
[set-various-coding-system
]
90 (list 'menu-item
"Set Coding Systems" set-coding-system-map
91 :enable
'default-enable-multibyte-characters
))
92 (define-key-after mule-menu-keymap
[view-hello-file
]
93 '(menu-item "Show Multi-lingual Text" view-hello-file
94 :enable
(file-readable-p
95 (expand-file-name "HELLO" data-directory
))
96 :help
"Display file which says HELLO in many languages")
98 (define-key-after mule-menu-keymap
[separator-coding-system
]
101 (define-key-after mule-menu-keymap
[describe-language-environment
]
102 (list 'menu-item
"Describe Language Environment"
103 describe-language-environment-map
104 :help
"Show multilingual settings for a specific language")
106 (define-key-after mule-menu-keymap
[describe-input-method
]
107 '(menu-item "Describe Input Method..." describe-input-method
108 :help
"Keyboard layout for a specific input method")
110 (define-key-after mule-menu-keymap
[describe-coding-system
]
111 '(menu-item "Describe Coding System..." describe-coding-system
)
113 (define-key-after mule-menu-keymap
[list-character-sets
]
114 '(menu-item "List Character Sets" list-character-sets
115 :help
"Show table of available character sets"))
116 (define-key-after mule-menu-keymap
[mule-diag
]
117 '(menu-item "Show All of Mule Status" mule-diag
118 :help
"Display multilingual environment settings")
121 (define-key-after set-coding-system-map
[universal-coding-system-argument
]
122 '(menu-item "For Next Command" universal-coding-system-argument
123 :help
"Coding system to be used by next command")
125 (define-key-after set-coding-system-map
[separator-1
]
128 (define-key-after set-coding-system-map
[set-buffer-file-coding-system
]
129 '(menu-item "For Saving This Buffer" set-buffer-file-coding-system
130 :help
"How to encode this buffer when saved")
132 (define-key-after set-coding-system-map
[revert-buffer-with-coding-system
]
133 '(menu-item "For Reverting This File Now" revert-buffer-with-coding-system
134 :enable buffer-file-name
135 :help
"Revisit this file immediately using specified coding system")
137 (define-key-after set-coding-system-map
[set-file-name-coding-system
]
138 '(menu-item "For File Name" set-file-name-coding-system
139 :help
"How to decode/encode file names")
141 (define-key-after set-coding-system-map
[separator-2
]
145 (define-key-after set-coding-system-map
[set-keyboard-coding-system
]
146 '(menu-item "For Keyboard" set-keyboard-coding-system
147 :help
"How to decode keyboard input")
149 (define-key-after set-coding-system-map
[set-terminal-coding-system
]
150 '(menu-item "For Terminal" set-terminal-coding-system
151 :enable
(null (memq initial-window-system
'(x w32 mac
)))
152 :help
"How to encode terminal output")
154 (define-key-after set-coding-system-map
[separator-3
]
157 (define-key-after set-coding-system-map
[set-selection-coding-system
]
158 '(menu-item "For X Selections/Clipboard" set-selection-coding-system
159 :visible
(display-selections-p)
160 :help
"How to en/decode data to/from selection/clipboard")
162 (define-key-after set-coding-system-map
[set-next-selection-coding-system
]
163 '(menu-item "For Next X Selection" set-next-selection-coding-system
164 :visible
(display-selections-p)
165 :help
"How to en/decode next selection/clipboard operation")
167 (define-key-after set-coding-system-map
[set-buffer-process-coding-system
]
168 '(menu-item "For I/O with Subprocess" set-buffer-process-coding-system
169 :visible
(fboundp 'start-process
)
170 :enable
(get-buffer-process (current-buffer))
171 :help
"How to en/decode I/O from/to subprocess connected to this buffer")
175 (define-key setup-language-environment-map
176 [Default] '(menu-item "Default" setup-specified-language-environment))
178 (define-key describe-language-environment-map
179 [Default] '(menu-item "Default" describe-specified-language-support
))
181 ;; This should be a single character key binding because users use it
182 ;; very frequently while editing multilingual text. Now we can use
183 ;; only two such keys: "\C-\\" and "\C-^", but the latter is not
184 ;; convenient because it requires shifting on most keyboards. An
185 ;; alternative is "\C-\]" which is now bound to `abort-recursive-edit'
186 ;; but it won't be used that frequently.
187 (define-key global-map
"\C-\\" 'toggle-input-method
)
189 ;; This is no good because people often type Shift-SPC
190 ;; meaning to type SPC. -- rms.
191 ;; ;; Here's an alternative key binding for X users (Shift-SPACE).
192 ;; (define-key global-map [?\S- ] 'toggle-input-method)
194 ;;; Mule related hyperlinks.
195 (defconst help-xref-mule-regexp-template
196 (purecopy (concat "\\(\\<\\("
197 "\\(coding system\\)\\|"
198 "\\(input method\\)\\|"
199 "\\(character set\\)\\|"
202 ;; Note starting with word-syntax character:
203 "`\\(\\sw\\(\\sw\\|\\s_\\)+\\)'")))
205 (defun coding-system-change-eol-conversion (coding-system eol-type
)
206 "Return a coding system which differs from CODING-SYSTEM in eol conversion.
207 The returned coding system converts end-of-line by EOL-TYPE
208 but text as the same way as CODING-SYSTEM.
209 EOL-TYPE should be `unix', `dos', `mac', or nil.
210 If EOL-TYPE is nil, the returned coding system detects
211 how end-of-line is formatted automatically while decoding.
213 EOL-TYPE can be specified by an integer 0, 1, or 2.
214 They means `unix', `dos', and `mac' respectively."
215 (if (symbolp eol-type
)
216 (setq eol-type
(cond ((eq eol-type
'unix
) 0)
217 ((eq eol-type
'dos
) 1)
218 ((eq eol-type
'mac
) 2)
220 (let ((orig-eol-type (coding-system-eol-type coding-system
)))
221 (if (vectorp orig-eol-type
)
224 (aref orig-eol-type eol-type
))
225 (let ((base (coding-system-base coding-system
)))
228 (if (= eol-type orig-eol-type
)
230 (setq orig-eol-type
(coding-system-eol-type base
))
231 (if (vectorp orig-eol-type
)
232 (aref orig-eol-type eol-type
))))))))
234 (defun coding-system-change-text-conversion (coding-system coding
)
235 "Return a coding system which differs from CODING-SYSTEM in text conversion.
236 The returned coding system converts text by CODING
237 but end-of-line as the same way as CODING-SYSTEM.
238 If CODING is nil, the returned coding system detects
239 how text is formatted automatically while decoding."
240 (let ((eol-type (coding-system-eol-type coding-system
)))
241 (coding-system-change-eol-conversion
242 (if coding coding
'undecided
)
243 (if (numberp eol-type
) (aref [unix dos mac
] eol-type
)))))
245 (defun toggle-enable-multibyte-characters (&optional arg
)
246 "Change whether this buffer uses multibyte characters.
247 With arg, use multibyte characters if the arg is positive.
249 Note that this command does not convert the byte contents of
250 the buffer; it only changes the way those bytes are interpreted.
251 In general, therefore, this command *changes* the sequence of
252 characters that the current buffer contains.
254 We suggest you avoid using use this command unless you know what you
255 are doing. If you use it by mistake, and the buffer is now displayed
256 wrong, use this command again to toggle back to the right mode."
259 (if (null arg
) (null enable-multibyte-characters
)
260 (> (prefix-numeric-value arg
) 0))))
261 (set-buffer-multibyte new-flag
))
262 (force-mode-line-update))
264 (defun view-hello-file ()
265 "Display the HELLO file which list up many languages and characters."
267 ;; We have to decode the file in any environment.
268 (let ((default-enable-multibyte-characters t
)
269 (coding-system-for-read 'iso-2022-7bit
))
270 (view-file (expand-file-name "HELLO" data-directory
))))
272 (defun universal-coding-system-argument (coding-system)
273 "Execute an I/O command using the specified coding system."
275 (let ((default (and buffer-file-coding-system
276 (not (eq (coding-system-type buffer-file-coding-system
)
278 buffer-file-coding-system
)))
279 (list (read-coding-system
281 (format "Coding system for following command (default %s): " default
)
282 "Coding system for following command: ")
284 (let* ((keyseq (read-key-sequence
285 (format "Command to execute with %s:" coding-system
)))
286 (cmd (key-binding keyseq
))
289 (when (eq cmd
'universal-argument
)
290 (call-interactively cmd
)
292 ;; Process keys bound in `universal-argument-map'.
294 (setq keyseq
(read-key-sequence nil t
)
295 cmd
(key-binding keyseq t
))
296 (not (eq cmd
'universal-argument-other-key
)))
297 (let ((current-prefix-arg prefix-arg
)
298 ;; Have to bind `last-command-char' here so that
299 ;; `digit-argument', for instance, can compute the
301 (last-command-char (aref keyseq
0)))
302 (call-interactively cmd
)))
304 ;; This is the final call to `universal-argument-other-key', which
305 ;; set's the final `prefix-arg.
306 (let ((current-prefix-arg prefix-arg
))
307 (call-interactively cmd
))
309 ;; Read the command to execute with the given prefix arg.
310 (setq prefix prefix-arg
311 keyseq
(read-key-sequence nil t
)
312 cmd
(key-binding keyseq
)))
314 (let ((coding-system-for-read coding-system
)
315 (coding-system-for-write coding-system
)
316 (coding-system-require-warning t
)
317 (current-prefix-arg prefix
))
319 (call-interactively cmd
))))
321 (defun set-default-coding-systems (coding-system)
322 "Set default value of various coding systems to CODING-SYSTEM.
323 This sets the following coding systems:
324 o coding system of a newly created buffer
325 o default coding system for subprocess I/O
326 This also sets the following values:
327 o default value used as `file-name-coding-system' for converting file names
328 if CODING-SYSTEM is ASCII-compatible.
329 o default value for the command `set-terminal-coding-system' (not on MSDOS)
330 o default value for the command `set-keyboard-coding-system'
331 if CODING-SYSTEM is ASCII-compatible.."
332 (check-coding-system coding-system
)
333 (setq-default buffer-file-coding-system coding-system
)
334 (if (fboundp 'ucs-set-table-for-input
)
335 (dolist (buffer (buffer-list))
336 (or (local-variable-p 'buffer-file-coding-system buffer
)
337 (ucs-set-table-for-input buffer
))))
339 (if (and default-enable-multibyte-characters
(not (eq system-type
'darwin
))
340 (or (not coding-system
)
341 (not (coding-system-get coding-system
'ascii-incompatible
))))
342 ;; The file-name coding system on Darwin systems is always utf-8.
343 (setq default-file-name-coding-system coding-system
))
344 ;; If coding-system is nil, honor that on MS-DOS as well, so
345 ;; that they could reset the terminal coding system.
346 (unless (and (eq window-system
'pc
) coding-system
)
347 (setq default-terminal-coding-system coding-system
))
348 (if (or (not coding-system
)
349 (not (coding-system-get coding-system
'ascii-incompatible
)))
350 (setq default-keyboard-coding-system coding-system
))
351 ;; Preserve eol-type from existing default-process-coding-systems.
352 ;; On non-unix-like systems in particular, these may have been set
353 ;; carefully by the user, or by the startup code, to deal with the
354 ;; users shell appropriately, so should not be altered by changing
355 ;; language environment.
357 (coding-system-change-text-conversion
358 (car default-process-coding-system
) coding-system
))
360 (coding-system-change-text-conversion
361 (cdr default-process-coding-system
) coding-system
)))
362 (setq default-process-coding-system
363 (cons output-coding input-coding
))))
365 (defun prefer-coding-system (coding-system)
366 "Add CODING-SYSTEM at the front of the priority list for automatic detection.
367 This also sets the following coding systems:
368 o coding system of a newly created buffer
369 o default coding system for subprocess I/O
370 This also sets the following values:
371 o default value used as `file-name-coding-system' for converting file names.
372 o default value for the command `set-terminal-coding-system' (not on MSDOS)
373 o default value for the command `set-keyboard-coding-system'
375 If CODING-SYSTEM specifies a certain type of EOL conversion, the coding
376 systems set by this function will use that type of EOL conversion.
378 This command does not change the default value of terminal coding system
379 for MS-DOS terminal, because DOS terminals only support a single coding
380 system, and Emacs automatically sets the default to that coding system at
383 A coding system that requires automatic detection of text
384 encoding (e.g. undecided, unix) can't be preferred.
386 See also `coding-category-list' and `coding-system-category'."
387 (interactive "zPrefer coding system: ")
388 (if (not (and coding-system
(coding-system-p coding-system
)))
389 (error "Invalid coding system `%s'" coding-system
))
390 (let ((coding-category (coding-system-category coding-system
))
391 (base (coding-system-base coding-system
))
392 (eol-type (coding-system-eol-type coding-system
)))
393 (if (not coding-category
)
394 ;; CODING-SYSTEM is no-conversion or undecided.
395 (error "Can't prefer the coding system `%s'" coding-system
))
396 (set coding-category
(or base coding-system
))
397 ;; Changing the binding of a coding category requires this call.
398 (update-coding-systems-internal)
399 (or (eq coding-category
(car coding-category-list
))
400 ;; We must change the order.
401 (set-coding-priority (list coding-category
)))
402 (if (and base
(interactive-p))
403 (message "Highest priority is set to %s (base of %s)"
405 ;; If they asked for specific EOL conversion, honor that.
406 (if (memq eol-type
'(0 1 2))
408 (coding-system-change-eol-conversion base eol-type
))
409 (setq coding-system base
))
410 (set-default-coding-systems coding-system
)))
412 (defvar sort-coding-systems-predicate nil
413 "If non-nil, a predicate function to sort coding systems.
415 It is called with two coding systems, and should return t if the first
416 one is \"less\" than the second.
418 The function `sort-coding-systems' use it.")
420 (defun sort-coding-systems (codings)
421 "Sort coding system list CODINGS by a priority of each coding system.
423 If a coding system is most preferred, it has the highest priority.
424 Otherwise, a coding system corresponds to some MIME charset has higher
425 priorities. Among them, a coding system included in `coding-system'
426 key of the current language environment has higher priorities. See
427 also the documentation of `language-info-alist'.
429 If the variable `sort-coding-systems-predicate' (which see) is
430 non-nil, it is used to sort CODINGS in the different way than above."
431 (if sort-coding-systems-predicate
432 (sort codings sort-coding-systems-predicate
)
433 (let* ((from-categories (mapcar #'(lambda (x) (symbol-value x
))
434 coding-category-list
))
435 (most-preferred (car from-categories
))
436 (lang-preferred (get-language-info current-language-environment
440 (let ((base (coding-system-base x
)))
441 ;; We calculate the priority number 0..255 by
442 ;; using the 8 bits PMMLCEII as this:
443 ;; P: 1 iff most preferred.
444 ;; MM: greater than 0 iff mime-charset.
445 ;; L: 1 iff one of the current lang. env.'s codings.
446 ;; C: 1 iff one of codings listed in the category list.
447 ;; E: 1 iff not XXX-with-esc
448 ;; II: if iso-2022 based, 0..3, else 1.
450 (lsh (if (eq base most-preferred
) 1 0) 7)
452 (let ((mime (coding-system-get base
'mime-charset
)))
453 ;; Prefer coding systems corresponding to a
456 ;; Lower utf-16 priority so that we
457 ;; normally prefer utf-8 to it, and put
458 ;; x-ctext below that.
459 (cond ((string-match "utf-16"
462 ((string-match "^x-" (symbol-name mime
))
467 (lsh (if (memq base lang-preferred
) 1 0) 4)
468 (lsh (if (memq base from-categories
) 1 0) 3)
469 (lsh (if (string-match "-with-esc\\'"
472 (if (eq (coding-system-type base
) 2)
473 ;; For ISO based coding systems, prefer
474 ;; one that doesn't use escape sequences.
475 (let ((flags (coding-system-flags base
)))
476 (if (or (consp (aref flags
0))
477 (consp (aref flags
1))
478 (consp (aref flags
2))
479 (consp (aref flags
3)))
480 (if (or (aref flags
8) (aref flags
9))
485 (sort codings
(function (lambda (x y
)
486 (> (funcall func x
) (funcall func y
))))))))
488 (defun find-coding-systems-region (from to
)
489 "Return a list of proper coding systems to encode a text between FROM and TO.
490 If FROM is a string, find coding systems in that instead of the buffer.
491 All coding systems in the list can safely encode any multibyte characters
494 If the text contains no multibyte characters, return a list of a single
495 element `undecided'."
496 (let ((codings (find-coding-systems-region-internal from to
)))
498 ;; The text contains only ASCII characters. Any coding
501 ;; We need copy-sequence because sorting will alter the argument.
502 (sort-coding-systems (copy-sequence codings
)))))
504 (defun find-coding-systems-string (string)
505 "Return a list of proper coding systems to encode STRING.
506 All coding systems in the list can safely encode any multibyte characters
509 If STRING contains no multibyte characters, return a list of a single
510 element `undecided'."
511 (find-coding-systems-region string nil
))
513 (defun find-coding-systems-for-charsets (charsets)
514 "Return a list of proper coding systems to encode characters of CHARSETS.
515 CHARSETS is a list of character sets.
516 It actually checks at most the first 96 characters of each charset.
517 So, if a charset of dimension two is included in CHARSETS, the value may
518 contain a coding system that can't encode all characters of the charset."
519 (cond ((or (null charsets
)
520 (and (= (length charsets
) 1)
521 (eq 'ascii
(car charsets
))))
523 ((or (memq 'eight-bit-control charsets
)
524 (memq 'eight-bit-graphic charsets
))
525 '(raw-text emacs-mule
))
529 (while (and codings charsets
)
530 (setq charset
(car charsets
) charsets
(cdr charsets
))
531 (unless (eq charset
'ascii
)
532 (setq str
(make-string 96 32))
533 (if (= (charset-dimension charset
) 1)
534 (if (= (charset-chars charset
) 96)
536 (aset str i
(make-char charset
(+ i
32))))
538 (aset str i
(make-char charset
(+ i
33)))))
539 (if (= (charset-chars charset
) 96)
541 (aset str i
(make-char charset
32 (+ i
32))))
543 (aset str i
(make-char charset
33 (+ i
33))))))
544 (setq l
(find-coding-systems-string str
))
548 (dolist (elt codings
)
550 (setq ll
(cons elt ll
))))
551 (setq codings ll
)))))
554 (defun find-multibyte-characters (from to
&optional maxcount excludes
)
555 "Find multibyte characters in the region specified by FROM and TO.
556 If FROM is a string, find multibyte characters in the string.
557 The return value is an alist of the following format:
558 ((CHARSET COUNT CHAR ...) ...)
560 CHARSET is a character set,
561 COUNT is a number of characters,
562 CHARs are the characters found from the character set.
563 Optional 3rd arg MAXCOUNT limits how many CHARs are put in the above list.
564 Optional 4th arg EXCLUDE is a list of character sets to be ignored.
566 For invalid characters, CHARs are actually strings."
571 (while (setq idx
(string-match "[^\000-\177]" from idx
))
572 (setq char
(aref from idx
)
573 charset
(char-charset char
))
574 (if (eq charset
'unknown
)
575 (setq char
(match-string 0)))
576 (if (or (memq charset
'(unknown
577 eight-bit-control eight-bit-graphic
))
578 (not (or (eq excludes t
) (memq charset excludes
))))
579 (let ((slot (assq charset chars
)))
581 (if (not (memq char
(nthcdr 2 slot
)))
582 (let ((count (nth 1 slot
)))
583 (setcar (cdr slot
) (1+ count
))
584 (if (or (not maxcount
) (< count maxcount
))
585 (nconc slot
(list char
)))))
586 (setq chars
(cons (list charset
1 char
) chars
)))))
587 (setq idx
(1+ idx
))))
590 (while (re-search-forward "[^\000-\177]" to t
)
591 (setq char
(preceding-char)
592 charset
(char-charset char
))
593 (if (eq charset
'unknown
)
594 (setq char
(match-string 0)))
595 (if (or (memq charset
'(unknown eight-bit-control eight-bit-graphic
))
596 (not (or (eq excludes t
) (memq charset excludes
))))
597 (let ((slot (assq charset chars
)))
599 (if (not (member char
(nthcdr 2 slot
)))
600 (let ((count (nth 1 slot
)))
601 (setcar (cdr slot
) (1+ count
))
602 (if (or (not maxcount
) (< count maxcount
))
603 (nconc slot
(list char
)))))
604 (setq chars
(cons (list charset
1 char
) chars
))))))))
608 (defun search-unencodable-char (coding-system)
609 "Search forward from point for a character that is not encodable.
610 It asks which coding system to check.
611 If such a character is found, set point after that character.
612 Otherwise, don't move point.
614 When called from a program, the value is a position of the found character,
615 or nil if all characters are encodable."
617 (list (let ((default (or buffer-file-coding-system
'us-ascii
)))
619 (format "Coding-system (default %s): " default
)
621 (let ((pos (unencodable-char-position (point) (point-max) coding-system
)))
624 (message "All following characters are encodable by %s" coding-system
))
628 (defvar last-coding-system-specified nil
629 "Most recent coding system explicitly specified by the user when asked.
630 This variable is set whenever Emacs asks the user which coding system
631 to use in order to write a file. If you set it to nil explicitly,
632 then call `write-region', then afterward this variable will be non-nil
633 only if the user was explicitly asked and specified a coding system.")
635 (defvar select-safe-coding-system-accept-default-p nil
636 "If non-nil, a function to control the behavior of coding system selection.
637 The meaning is the same as the argument ACCEPT-DEFAULT-P of the
638 function `select-safe-coding-system' (which see). This variable
639 overrides that argument.")
641 (defun select-safe-coding-system-interactively (from to codings unsafe
642 &optional rejected default
)
643 "Select interactively a coding system for the region FROM ... TO.
644 FROM can be a string, as in `write-region'.
645 CODINGS is the list of base coding systems known to be safe for this region,
646 typically obtained with `find-coding-systems-region'.
647 UNSAFE is a list of coding systems known to be unsafe for this region.
648 REJECTED is a list of coding systems which were safe but for some reason
649 were not recommended in the particular context.
650 DEFAULT is the coding system to use by default in the query."
651 ;; At first, if some defaults are unsafe, record at most 11
652 ;; problematic characters and their positions for them by turning
655 ;; ((CODING (POS . CHAR) (POS . CHAR) ...) ...)
658 (mapcar #'(lambda (coding)
661 (mapcar #'(lambda (pos)
662 (cons pos
(aref from pos
)))
663 (unencodable-char-position
664 0 (length from
) coding
666 (mapcar #'(lambda (pos)
667 (cons pos
(char-after pos
)))
668 (unencodable-char-position
669 from to coding
11)))))
672 ;; Change each safe coding system to the corresponding
673 ;; mime-charset name if it is also a coding system. Such a name
674 ;; is more friendly to users.
678 (setq mime-charset
(coding-system-get (car l
) 'mime-charset
))
679 (if (and mime-charset
(coding-system-p mime-charset
))
680 (setcar l mime-charset
))
683 ;; Don't offer variations with locking shift, which you
684 ;; basically never want.
686 (dolist (elt codings
(setq codings
(nreverse l
)))
687 (unless (or (eq 'coding-category-iso-7-else
688 (coding-system-category elt
))
689 (eq 'coding-category-iso-8-else
690 (coding-system-category elt
)))
693 ;; Remove raw-text, emacs-mule and no-conversion unless nothing
694 ;; else is available.
698 (delq 'no-conversion codings
)))
699 '(raw-text emacs-mule no-conversion
)))
701 (let ((window-configuration (current-window-configuration))
702 (bufname (buffer-name))
705 ;; If some defaults are unsafe, make sure the offending
706 ;; buffer is displayed.
707 (when (and unsafe
(not (stringp from
)))
708 (pop-to-buffer bufname
)
709 (goto-char (apply 'min
(mapcar #'(lambda (x) (car (cadr x
)))
711 ;; Then ask users to select one from CODINGS while showing
712 ;; the reason why none of the defaults are not used.
713 (with-output-to-temp-buffer "*Warning*"
714 (with-current-buffer standard-output
715 (if (and (null rejected
) (null unsafe
))
716 (insert "No default coding systems to try for "
718 (format "string \"%s\"." from
)
719 (format "buffer `%s'." bufname
)))
721 "These default coding systems were tried to encode"
723 (concat " \"" (if (> (length from
) 10)
724 (concat (substring from
0 10) "...\"")
726 (format " text\nin the buffer `%s'" bufname
))
730 (dolist (x (append rejected unsafe
))
731 (princ " ") (princ (car x
)))
733 (fill-region-as-paragraph pos
(point)))
735 (insert "These safely encodes the target text,
736 but it is not recommended for encoding text in this context,
737 e.g., for sending an email message.\n ")
739 (princ " ") (princ x
))
742 (insert (if rejected
"And the others"
743 "However, each of them")
744 " encountered these problematic characters:\n")
745 (dolist (coding unsafe
)
746 (insert (format " %s:" (car coding
)))
749 #'(lambda (bufname pos
)
750 (when (buffer-live-p (get-buffer bufname
))
751 (pop-to-buffer bufname
)
754 #'(lambda (bufname pos coding
)
755 (when (buffer-live-p (get-buffer bufname
))
756 (pop-to-buffer bufname
)
760 (search-unencodable-char coding
)
761 (forward-char -
1))))))
762 (dolist (elt (cdr coding
))
765 (insert (if (< i
10) (cdr elt
) "..."))
771 "mouse-2, RET: jump to this character"
773 'help-args
(list bufname
(car elt
)))
778 "mouse-2, RET: next unencodable character"
780 'help-args
(list bufname
(car elt
)
785 The first problematic character is at point in the displayed buffer,\n"
786 (substitute-command-keys "\
787 and \\[universal-argument] \\[what-cursor-position] will give information about it.\n"))))
789 one of the following safe coding systems, or edit the buffer:\n")
793 (princ " ") (princ x
))
795 (fill-region-as-paragraph pos
(point)))
796 (insert "Or specify any other coding system
797 at the risk of losing the problematic characters.\n")))
799 ;; Read a coding system.
802 (format "Select coding system (default %s): " default
)
804 (setq last-coding-system-specified coding-system
))
806 (kill-buffer "*Warning*")
807 (set-window-configuration window-configuration
)
810 (defun select-safe-coding-system (from to
&optional default-coding-system
811 accept-default-p file
)
812 "Ask a user to select a safe coding system from candidates.
813 The candidates of coding systems which can safely encode a text
814 between FROM and TO are shown in a popup window. Among them, the most
815 proper one is suggested as the default.
817 The list of `buffer-file-coding-system' of the current buffer,
818 the `default-buffer-file-coding-system', and the
819 most preferred coding system (if it corresponds to a MIME charset) is
820 treated as the default coding system list. Among them, the first one
821 that safely encodes the text is normally selected silently and
822 returned without any user interaction. See also the command
823 `prefer-coding-system'.
825 However, the user is queried if the chosen coding system is
826 inconsistent with what would be selected by `find-auto-coding' from
827 coding cookies &c. if the contents of the region were read from a
828 file. (That could lead to data corruption in a file subsequently
829 re-visited and edited.)
831 Optional 3rd arg DEFAULT-CODING-SYSTEM specifies a coding system or a
832 list of coding systems to be prepended to the default coding system
833 list. However, if DEFAULT-CODING-SYSTEM is a list and the first
834 element is t, the cdr part is used as the defualt coding system list,
835 i.e. `buffer-file-coding-system', `default-buffer-file-coding-system',
836 and the most preferred coding system are not used.
838 Optional 4th arg ACCEPT-DEFAULT-P, if non-nil, is a function to
839 determine the acceptability of the silently selected coding system.
840 It is called with that coding system, and should return nil if it
841 should not be silently selected and thus user interaction is required.
843 Optional 5th arg FILE is the file name to use for this purpose.
844 That is different from `buffer-file-name' when handling `write-region'
847 The variable `select-safe-coding-system-accept-default-p', if
848 non-nil, overrides ACCEPT-DEFAULT-P.
850 Kludgy feature: if FROM is a string, the string is the target text,
852 (if (and default-coding-system
853 (not (listp default-coding-system
)))
854 (setq default-coding-system
(list default-coding-system
)))
856 (let ((no-other-defaults nil
)
858 (unless (or (stringp from
) find-file-literally
)
859 ;; Find an auto-coding that is specified for the the current
860 ;; buffer and file from the region FROM and TO.
865 (setq auto-cs
(find-auto-coding (or file buffer-file-name
"")
868 (if (coding-system-p (car auto-cs
))
869 (setq auto-cs
(car auto-cs
))
873 Invalid coding system `%s' is specified
874 for the current buffer/file by the %s.
875 It is highly recommended to fix it before writing to a file."
877 (if (eq (cdr auto-cs
) :coding
) ":coding tag"
878 (format "variable `%s'" (cdr auto-cs
)))))
879 (or (yes-or-no-p "Really proceed with writing? ")
880 (error "Save aborted"))
881 (setq auto-cs nil
))))))
883 (if (eq (car default-coding-system
) t
)
884 (setq no-other-defaults t
885 default-coding-system
(cdr default-coding-system
)))
887 ;; Change elements of the list to (coding . base-coding).
888 (setq default-coding-system
889 (mapcar (function (lambda (x) (cons x
(coding-system-base x
))))
890 default-coding-system
))
892 (if (and auto-cs
(not no-other-defaults
))
893 ;; If the file has a coding cookie, try to use it before anything
894 ;; else (i.e. before default-coding-system which will typically come
895 ;; from file-coding-system-alist).
896 (let ((base (coding-system-base auto-cs
)))
897 (or (memq base
'(nil undecided
))
898 (rassq base default-coding-system
)
899 (push (cons auto-cs base
) default-coding-system
))))
901 ;; From now on, the list of defaults is reversed.
902 (setq default-coding-system
(nreverse default-coding-system
))
904 (unless no-other-defaults
905 ;; If buffer-file-coding-system is not nil nor undecided, append it
907 (if buffer-file-coding-system
908 (let ((base (coding-system-base buffer-file-coding-system
)))
909 (or (eq base
'undecided
)
910 (rassq base default-coding-system
)
911 (push (cons buffer-file-coding-system base
)
912 default-coding-system
))))
914 ;; If default-buffer-file-coding-system is not nil nor undecided,
915 ;; append it to the defaults.
916 (if default-buffer-file-coding-system
917 (let ((base (coding-system-base default-buffer-file-coding-system
)))
918 (or (eq base
'undecided
)
919 (rassq base default-coding-system
)
920 (push (cons default-buffer-file-coding-system base
)
921 default-coding-system
))))
923 ;; If the most preferred coding system has the property mime-charset,
924 ;; append it to the defaults.
925 (let ((tail coding-category-list
)
927 (while (and tail
(not (setq preferred
(symbol-value (car tail
)))))
928 (setq tail
(cdr tail
)))
929 (and (coding-system-p preferred
)
930 (setq base
(coding-system-base preferred
))
931 (coding-system-get preferred
'mime-charset
)
932 (not (rassq base default-coding-system
))
933 (push (cons preferred base
)
934 default-coding-system
))))
936 (if select-safe-coding-system-accept-default-p
937 (setq accept-default-p select-safe-coding-system-accept-default-p
))
939 (let ((codings (find-coding-systems-region from to
))
941 safe rejected unsafe
)
942 (if (eq (car codings
) 'undecided
)
943 ;; Any coding system is ok.
944 (setq coding-system t
)
945 ;; Classify the defaults into safe, rejected, and unsafe.
946 (dolist (elt default-coding-system
)
947 (if (memq (cdr elt
) codings
)
948 (if (and (functionp accept-default-p
)
949 (not (funcall accept-default-p
(cdr elt
))))
950 (push (car elt
) rejected
)
951 (push (car elt
) safe
))
952 (push (car elt
) unsafe
)))
954 (setq coding-system
(car safe
))))
956 ;; If all the defaults failed, ask a user.
957 (when (not coding-system
)
958 (setq coding-system
(select-safe-coding-system-interactively
959 from to codings unsafe rejected
(car codings
))))
961 (if (vectorp (coding-system-eol-type coding-system
))
962 (let ((eol (coding-system-eol-type buffer-file-coding-system
)))
965 (coding-system-change-eol-conversion coding-system eol
)))))
967 (if (eq coding-system t
)
968 (setq coding-system buffer-file-coding-system
))
969 ;; Check we're not inconsistent with what `coding:' spec &c would
970 ;; give when file is re-read.
971 ;; But don't do this if we explicitly ignored the cookie
972 ;; by using `find-file-literally'.
976 (memq (coding-system-type coding-system
) '(0 5)))))
977 ;; Merge coding-system and auto-cs as far as possible.
978 (if (not coding-system
)
979 (setq coding-system auto-cs
)
981 (setq auto-cs coding-system
)
982 (let ((eol-type-1 (coding-system-eol-type coding-system
))
983 (eol-type-2 (coding-system-eol-type auto-cs
)))
984 (if (eq (coding-system-base coding-system
) 'undecided
)
985 (setq coding-system
(coding-system-change-text-conversion
986 coding-system auto-cs
))
987 (if (eq (coding-system-base auto-cs
) 'undecided
)
988 (setq auto-cs
(coding-system-change-text-conversion
989 auto-cs coding-system
))))
990 (if (vectorp eol-type-1
)
991 (or (vectorp eol-type-2
)
992 (setq coding-system
(coding-system-change-eol-conversion
993 coding-system eol-type-2
)))
994 (if (vectorp eol-type-2
)
995 (setq auto-cs
(coding-system-change-eol-conversion
996 auto-cs eol-type-1
)))))))
999 ;; Don't barf if writing a compressed file, say.
1000 ;; This check perhaps isn't ideal, but is probably
1001 ;; the best thing to do.
1002 (not (auto-coding-alist-lookup (or file buffer-file-name
"")))
1003 (not (coding-system-equal coding-system auto-cs
)))
1004 (unless (yes-or-no-p
1005 (format "Selected encoding %s disagrees with \
1006 %s specified by file contents. Really save (else edit coding cookies \
1007 and try again)? " coding-system auto-cs
))
1008 (error "Save aborted"))))
1011 (setq select-safe-coding-system-function
'select-safe-coding-system
)
1013 (defun select-message-coding-system ()
1014 "Return a coding system to encode the outgoing message of the current buffer.
1015 It at first tries the first coding system found in these variables
1017 (1) local value of `buffer-file-coding-system'
1018 (2) value of `sendmail-coding-system'
1019 (3) value of `default-sendmail-coding-system'
1020 (4) value of `default-buffer-file-coding-system'
1021 If the found coding system can't encode the current buffer,
1022 or none of them are bound to a coding system,
1023 it asks the user to select a proper coding system."
1024 (let ((coding (or (and (local-variable-p 'buffer-file-coding-system
)
1025 buffer-file-coding-system
)
1026 sendmail-coding-system
1027 default-sendmail-coding-system
1028 default-buffer-file-coding-system
)))
1029 (if (eq coding
'no-conversion
)
1030 ;; We should never use no-conversion for outgoing mail.
1032 (if (fboundp select-safe-coding-system-function
)
1034 (funcall select-safe-coding-system-function
1035 (point-min) (point-max) coding
1036 (function (lambda (x)
1037 (coding-system-get x
'mime-charset
))))))
1039 ;; Be sure to use LF for end-of-line.
1040 (setq coding
(coding-system-change-eol-conversion coding
'unix
))
1041 ;; No coding system is decided. Usually this is the case that
1042 ;; the current buffer contains only ASCII. So, we hope
1043 ;; iso-8859-1 works.
1044 (setq coding
'iso-8859-1-unix
))
1047 ;;; Language support stuff.
1049 (defvar language-info-alist nil
1050 "Alist of language environment definitions.
1051 Each element looks like:
1052 (LANGUAGE-NAME . ((KEY . INFO) ...))
1053 where LANGUAGE-NAME is a string, the name of the language environment,
1054 KEY is a symbol denoting the kind of information, and
1055 INFO is the data associated with KEY.
1056 Meaningful values for KEY include
1058 documentation value is documentation of what this language environment
1059 is meant for, and how to use it.
1060 charset value is a list of the character sets used by this
1061 language environment.
1062 sample-text value is an expression which is evalled to generate
1063 a line of text written using characters appropriate
1064 for this language environment.
1065 setup-function value is a function to call to switch to this
1066 language environment.
1067 exit-function value is a function to call to leave this
1068 language environment.
1069 coding-system value is a list of coding systems that are good
1070 for saving text written in this language environment.
1071 This list serves as suggestions to the user;
1072 in effect, as a kind of documentation.
1073 coding-priority value is a list of coding systems for this language
1074 environment, in order of decreasing priority.
1075 This is used to set up the coding system priority
1076 list when you switch to this language environment.
1077 nonascii-translation
1078 value is a translation table to be set in the
1079 variable `nonascii-translation-table' in this
1080 language environment, or a character set from
1081 which `nonascii-insert-offset' is calculated.
1082 input-method value is a default input method for this language
1084 features value is a list of features requested in this
1085 language environment.
1086 ctext-non-standard-encodings
1087 value is a list of non-standard encoding
1088 names used in extended segments of CTEXT.
1090 `ctext-non-standard-encodings' for more
1093 The following keys take effect only when multibyte characters are
1094 globally disabled, i.e. the value of `default-enable-multibyte-characters'
1097 unibyte-syntax value is a library name to load to set
1098 unibyte 8-bit character syntaxes for this
1099 language environment.
1101 unibyte-display value is a coding system to encode characters
1102 for the terminal. Characters in the range
1103 of 160 to 255 display not as octal escapes,
1104 but as non-ASCII characters in this language
1107 (defun get-language-info (lang-env key
)
1108 "Return information listed under KEY for language environment LANG-ENV.
1109 KEY is a symbol denoting the kind of information.
1110 For a list of useful values for KEY and their meanings,
1111 see `language-info-alist'."
1112 (if (symbolp lang-env
)
1113 (setq lang-env
(symbol-name lang-env
)))
1114 (let ((lang-slot (assoc-string lang-env language-info-alist t
)))
1116 (cdr (assq key
(cdr lang-slot
))))))
1118 (defun set-language-info (lang-env key info
)
1119 "Modify part of the definition of language environment LANG-ENV.
1120 Specifically, this stores the information INFO under KEY
1121 in the definition of this language environment.
1122 KEY is a symbol denoting the kind of information.
1123 INFO is the value for that information.
1125 For a list of useful values for KEY and their meanings,
1126 see `language-info-alist'."
1127 (if (symbolp lang-env
)
1128 (setq lang-env
(symbol-name lang-env
)))
1129 (let (lang-slot key-slot
)
1130 (setq lang-slot
(assoc lang-env language-info-alist
))
1131 (if (null lang-slot
) ; If no slot for the language, add it.
1132 (setq lang-slot
(list lang-env
)
1133 language-info-alist
(cons lang-slot language-info-alist
)))
1134 (setq key-slot
(assq key lang-slot
))
1135 (if (null key-slot
) ; If no slot for the key, add it.
1137 (setq key-slot
(list key
))
1138 (setcdr lang-slot
(cons key-slot
(cdr lang-slot
)))))
1139 (setcdr key-slot
(purecopy info
))
1140 ;; Update the custom-type of `current-language-environment'.
1141 (put 'current-language-environment
'custom-type
1142 (cons 'choice
(mapcar
1145 (sort (mapcar 'car language-info-alist
) 'string
<))))))
1147 (defun set-language-info-alist (lang-env alist
&optional parents
)
1148 "Store ALIST as the definition of language environment LANG-ENV.
1149 ALIST is an alist of KEY and INFO values. See the documentation of
1150 `language-info-alist' for the meanings of KEY and INFO.
1152 Optional arg PARENTS is a list of parent menu names; it specifies
1153 where to put this language environment in the
1154 Describe Language Environment and Set Language Environment menus.
1155 For example, (\"European\") means to put this language environment
1156 in the European submenu in each of those two menus."
1157 (if (symbolp lang-env
)
1158 (setq lang-env
(symbol-name lang-env
)))
1159 (let ((describe-map describe-language-environment-map
)
1160 (setup-map setup-language-environment-map
))
1163 map parent-symbol parent prompt
)
1165 (if (symbolp (setq parent-symbol
(car l
)))
1166 (setq parent
(symbol-name parent
))
1167 (setq parent parent-symbol parent-symbol
(intern parent
)))
1168 (setq map
(lookup-key describe-map
(vector parent-symbol
)))
1169 ;; This prompt string is for define-prefix-command, so
1170 ;; that the map it creates will be suitable for a menu.
1171 (or map
(setq prompt
(format "%s Environment" parent
)))
1174 (setq map
(intern (format "describe-%s-environment-map"
1175 (downcase parent
))))
1176 (define-prefix-command map nil prompt
)
1177 (define-key-after describe-map
(vector parent-symbol
)
1178 (cons parent map
) t
)))
1179 (setq describe-map
(symbol-value map
))
1180 (setq map
(lookup-key setup-map
(vector parent-symbol
)))
1183 (setq map
(intern (format "setup-%s-environment-map"
1184 (downcase parent
))))
1185 (define-prefix-command map nil prompt
)
1186 (define-key-after setup-map
(vector parent-symbol
)
1187 (cons parent map
) t
)))
1188 (setq setup-map
(symbol-value map
))
1191 ;; Set up menu items for this language env.
1192 (let ((doc (assq 'documentation alist
)))
1194 (define-key-after describe-map
(vector (intern lang-env
))
1195 (cons lang-env
'describe-specified-language-support
) t
)))
1196 (define-key-after setup-map
(vector (intern lang-env
))
1197 (cons lang-env
'setup-specified-language-environment
) t
)
1200 (set-language-info lang-env
(car (car alist
)) (cdr (car alist
)))
1201 (setq alist
(cdr alist
)))))
1203 (defun read-language-name (key prompt
&optional default
)
1204 "Read a language environment name which has information for KEY.
1205 If KEY is nil, read any language environment.
1206 Prompt with PROMPT. DEFAULT is the default choice of language environment.
1207 This returns a language environment name as a string."
1208 (let* ((completion-ignore-case t
)
1209 (name (completing-read prompt
1212 (function (lambda (elm) (and (listp elm
) (assq key elm
)))))
1213 t nil nil default
)))
1214 (if (and (> (length name
) 0)
1216 (get-language-info name key
)))
1219 ;;; Multilingual input methods.
1221 "LEIM: Libraries of Emacs Input Methods."
1224 (defconst leim-list-file-name
"leim-list.el"
1225 "Name of LEIM list file.
1226 This file contains a list of libraries of Emacs input methods (LEIM)
1227 in the format of Lisp expression for registering each input method.
1228 Emacs loads this file at startup time.")
1230 (defvar leim-list-header
(format
1231 ";;; %s -- list of LEIM (Library of Emacs Input Method) -*-coding: iso-2022-7bit;-*-
1233 ;; This file contains a list of LEIM (Library of Emacs Input Method)
1234 ;; methods in the same directory as this file. Loading this file
1235 ;; registers all the input methods in Emacs.
1237 ;; Each entry has the form:
1238 ;; (register-input-method
1239 ;; INPUT-METHOD LANGUAGE-NAME ACTIVATE-FUNC
1240 ;; TITLE DESCRIPTION
1242 ;; See the function `register-input-method' for the meanings of the arguments.
1244 ;; If this directory is included in load-path, Emacs automatically
1245 ;; loads this file at startup time.
1248 leim-list-file-name
)
1249 "Header to be inserted in LEIM list file.")
1251 (defvar leim-list-entry-regexp
"^(register-input-method"
1252 "Regexp matching head of each entry in LEIM list file.
1253 See also the variable `leim-list-header'")
1255 (defvar update-leim-list-functions
1256 '(quail-update-leim-list-file)
1257 "List of functions to call to update LEIM list file.
1258 Each function is called with one arg, LEIM directory name.")
1260 (defun update-leim-list-file (&rest dirs
)
1261 "Update LEIM list file in directories DIRS."
1262 (let ((functions update-leim-list-functions
))
1264 (apply (car functions
) dirs
)
1265 (setq functions
(cdr functions
)))))
1267 (defvar current-input-method nil
1268 "The current input method for multilingual text.
1269 If nil, that means no input method is activated now.")
1270 (make-variable-buffer-local 'current-input-method
)
1271 (put 'current-input-method
'permanent-local t
)
1273 (defvar current-input-method-title nil
1274 "Title string of the current input method shown in mode line.")
1275 (make-variable-buffer-local 'current-input-method-title
)
1276 (put 'current-input-method-title
'permanent-local t
)
1278 (defcustom default-input-method nil
1279 "*Default input method for multilingual text (a string).
1280 This is the input method activated automatically by the command
1281 `toggle-input-method' (\\[toggle-input-method])."
1282 :link
'(custom-manual "(emacs)Input Methods")
1284 :type
'(choice (const nil
) (string
1285 :completion-ignore-case t
1286 :complete-function widget-string-complete
1287 :completion-alist input-method-alist
1288 :prompt-history input-method-history
))
1289 :set-after
'(current-language-environment))
1291 (put 'input-method-function
'permanent-local t
)
1293 (defvar input-method-history nil
1294 "History list for some commands that read input methods.")
1295 (make-variable-buffer-local 'input-method-history
)
1296 (put 'input-method-history
'permanent-local t
)
1298 (defvar inactivate-current-input-method-function nil
1299 "Function to call for inactivating the current input method.
1300 Every input method should set this to an appropriate value when activated.
1301 This function is called with no argument.
1303 This function should never change the value of `current-input-method'.
1304 It is set to nil by the function `inactivate-input-method'.")
1305 (make-variable-buffer-local 'inactivate-current-input-method-function
)
1306 (put 'inactivate-current-input-method-function
'permanent-local t
)
1308 (defvar describe-current-input-method-function nil
1309 "Function to call for describing the current input method.
1310 This function is called with no argument.")
1311 (make-variable-buffer-local 'describe-current-input-method-function
)
1312 (put 'describe-current-input-method-function
'permanent-local t
)
1314 (defvar input-method-alist nil
1315 "Alist of input method names vs how to use them.
1316 Each element has the form:
1317 (INPUT-METHOD LANGUAGE-ENV ACTIVATE-FUNC TITLE DESCRIPTION ARGS...)
1318 See the function `register-input-method' for the meanings of the elements.")
1320 (defun register-input-method (input-method lang-env
&rest args
)
1321 "Register INPUT-METHOD as an input method for language environment LANG-ENV.
1322 INPUT-METHOD and LANG-ENV are symbols or strings.
1324 The remaining arguments are:
1325 ACTIVATE-FUNC, TITLE, DESCRIPTION, and ARGS...
1326 ACTIVATE-FUNC is a function to call to activate this method.
1327 TITLE is a string to show in the mode line when this method is active.
1328 DESCRIPTION is a string describing this method and what it is good for.
1329 The ARGS, if any, are passed as arguments to ACTIVATE-FUNC.
1330 All told, the arguments to ACTIVATE-FUNC are INPUT-METHOD and the ARGS.
1332 This function is mainly used in the file \"leim-list.el\" which is
1333 created at Emacs build time, registering all Quail input methods
1334 contained in the Emacs distribution.
1336 In case you want to register a new Quail input method by yourself, be
1337 careful to use the same input method title as given in the third
1338 parameter of `quail-define-package'. (If the values are different, the
1339 string specified in this function takes precedence.)
1341 The commands `describe-input-method' and `list-input-methods' need
1342 these duplicated values to show some information about input methods
1343 without loading the relevant Quail packages."
1344 (if (symbolp lang-env
)
1345 (setq lang-env
(symbol-name lang-env
)))
1346 (if (symbolp input-method
)
1347 (setq input-method
(symbol-name input-method
)))
1348 (let ((info (cons lang-env args
))
1349 (slot (assoc input-method input-method-alist
)))
1352 (setq slot
(cons input-method info
))
1353 (setq input-method-alist
(cons slot input-method-alist
)))))
1355 (defun read-input-method-name (prompt &optional default inhibit-null
)
1356 "Read a name of input method from a minibuffer prompting with PROMPT.
1357 If DEFAULT is non-nil, use that as the default,
1358 and substitute it into PROMPT at the first `%s'.
1359 If INHIBIT-NULL is non-nil, null input signals an error.
1361 The return value is a string."
1363 (setq prompt
(format prompt default
)))
1364 (let* ((completion-ignore-case t
)
1365 ;; As it is quite normal to change input method in the
1366 ;; minibuffer, we must enable it even if
1367 ;; enable-recursive-minibuffers is currently nil.
1368 (enable-recursive-minibuffers t
)
1369 ;; This binding is necessary because input-method-history is
1371 (input-method (completing-read prompt input-method-alist
1372 nil t nil
'input-method-history
1374 (if (and input-method
(symbolp input-method
))
1375 (setq input-method
(symbol-name input-method
)))
1376 (if (> (length input-method
) 0)
1379 (error "No valid input method is specified")))))
1381 (defun activate-input-method (input-method)
1382 "Switch to input method INPUT-METHOD for the current buffer.
1383 If some other input method is already active, turn it off first.
1384 If INPUT-METHOD is nil, deactivate any current input method."
1385 (if (and input-method
(symbolp input-method
))
1386 (setq input-method
(symbol-name input-method
)))
1387 (if (and current-input-method
1388 (not (string= current-input-method input-method
)))
1389 (inactivate-input-method))
1390 (unless (or current-input-method
(null input-method
))
1391 (let ((slot (assoc input-method input-method-alist
)))
1393 (error "Can't activate input method `%s'" input-method
))
1394 (setq current-input-method-title nil
)
1395 (let ((func (nth 2 slot
)))
1396 (if (functionp func
)
1397 (apply (nth 2 slot
) input-method
(nthcdr 5 slot
))
1398 (if (and (consp func
) (symbolp (car func
)) (symbolp (cdr func
)))
1400 (require (cdr func
))
1401 (apply (car func
) input-method
(nthcdr 5 slot
)))
1402 (error "Can't activate input method `%s'" input-method
))))
1403 (setq current-input-method input-method
)
1404 (or (stringp current-input-method-title
)
1405 (setq current-input-method-title
(nth 3 slot
)))
1407 (run-hooks 'input-method-activate-hook
)
1408 (force-mode-line-update)))))
1410 (defun inactivate-input-method ()
1411 "Turn off the current input method."
1412 (when current-input-method
1413 (if input-method-history
1414 (unless (string= current-input-method
(car input-method-history
))
1415 (setq input-method-history
1416 (cons current-input-method
1417 (delete current-input-method input-method-history
))))
1418 (setq input-method-history
(list current-input-method
)))
1420 (funcall inactivate-current-input-method-function
)
1422 (run-hooks 'input-method-inactivate-hook
)
1423 (setq current-input-method nil
1424 input-method-function nil
1425 current-input-method-title nil
)
1426 (force-mode-line-update)))))
1428 (defun set-input-method (input-method &optional interactive
)
1429 "Select and activate input method INPUT-METHOD for the current buffer.
1430 This also sets the default input method to the one you specify.
1431 If INPUT-METHOD is nil, this function turns off the input method, and
1432 also causes you to be prompted for a name of an input method the next
1433 time you invoke \\[toggle-input-method].
1434 When called interactively, the optional arg INTERACTIVE is non-nil,
1435 which marks the variable `default-input-method' as set for Custom buffers.
1437 To deactivate the input method interactively, use \\[toggle-input-method].
1438 To deactivate it programmatically, use \\[inactivate-input-method]."
1440 (let* ((default (or (car input-method-history
) default-input-method
)))
1441 (list (read-input-method-name
1442 (if default
"Select input method (default %s): " "Select input method: ")
1445 (activate-input-method input-method
)
1446 (setq default-input-method input-method
)
1448 (customize-mark-as-set 'default-input-method
))
1449 default-input-method
)
1451 (defun toggle-input-method (&optional arg interactive
)
1452 "Enable or disable multilingual text input method for the current buffer.
1453 Only one input method can be enabled at any time in a given buffer.
1455 The normal action is to enable an input method if none was
1456 enabled, and disable the current one otherwise. Which input method
1457 to enable can be determined in various ways--either the one most
1458 recently used, or the one specified by `default-input-method', or
1459 as a last resort by reading the name of an input method in the
1462 With a prefix argument, read an input method name with the minibuffer
1463 and enable that one. The default is the most recent input method specified
1464 \(not including the currently active input method, if any).
1466 When called interactively, the optional arg INTERACTIVE is non-nil,
1467 which marks the variable `default-input-method' as set for Custom buffers."
1469 (interactive "P\np")
1470 (if (and current-input-method
(not arg
))
1471 (inactivate-input-method)
1472 (let ((default (or (car input-method-history
) default-input-method
)))
1473 (if (and arg default
(equal current-input-method default
)
1474 (> (length input-method-history
) 1))
1475 (setq default
(nth 1 input-method-history
)))
1476 (activate-input-method
1477 (if (or arg
(not default
))
1479 (read-input-method-name
1480 (if default
"Input method (default %s): " "Input method: " )
1483 (unless default-input-method
1485 (setq default-input-method current-input-method
)
1487 (customize-mark-as-set 'default-input-method
)))))))
1489 (defun describe-input-method (input-method)
1490 "Describe input method INPUT-METHOD."
1492 (list (read-input-method-name
1493 "Describe input method (default current choice): ")))
1494 (if (and input-method
(symbolp input-method
))
1495 (setq input-method
(symbol-name input-method
)))
1496 (help-setup-xref (list #'describe-input-method
1497 (or input-method current-input-method
))
1500 (if (null input-method
)
1501 (describe-current-input-method)
1502 (let ((current current-input-method
))
1506 (activate-input-method input-method
)
1507 (describe-current-input-method))
1508 (activate-input-method current
))
1510 (activate-input-method current
)
1511 (help-setup-xref (list #'describe-input-method input-method
)
1513 (with-output-to-temp-buffer (help-buffer)
1514 (let ((elt (assoc input-method input-method-alist
)))
1516 "Input method: %s (`%s' in mode line) for %s\n %s\n"
1517 input-method
(nth 3 elt
) (nth 1 elt
) (nth 4 elt
))))))))))
1519 (defun describe-current-input-method ()
1520 "Describe the input method currently in use.
1521 This is a subroutine for `describe-input-method'."
1522 (if current-input-method
1523 (if (and (symbolp describe-current-input-method-function
)
1524 (fboundp describe-current-input-method-function
))
1525 (funcall describe-current-input-method-function
)
1526 (message "No way to describe the current input method `%s'"
1527 current-input-method
)
1529 (error "No input method is activated now")))
1531 (defun read-multilingual-string (prompt &optional initial-input input-method
)
1532 "Read a multilingual string from minibuffer, prompting with string PROMPT.
1533 The input method selected last time is activated in minibuffer.
1534 If optional second arg INITIAL-INPUT is non-nil, insert it in the minibuffer
1536 Optional 3rd argument INPUT-METHOD specifies the input method
1537 to be activated instead of the one selected last time. It is a symbol
1541 current-input-method
1542 default-input-method
1543 (read-input-method-name "Input method: " nil t
)))
1544 (if (and input-method
(symbolp input-method
))
1545 (setq input-method
(symbol-name input-method
)))
1546 (let ((prev-input-method current-input-method
))
1549 (activate-input-method input-method
)
1550 (read-string prompt initial-input nil nil t
))
1551 (activate-input-method prev-input-method
))))
1553 ;; Variables to control behavior of input methods. All input methods
1554 ;; should react to these variables.
1556 (defcustom input-method-verbose-flag
'default
1557 "*A flag to control extra guidance given by input methods.
1558 The value should be nil, t, `complex-only', or `default'.
1560 The extra guidance is done by showing list of available keys in echo
1561 area. When you use the input method in the minibuffer, the guidance
1562 is shown at the bottom short window (split from the existing window).
1564 If the value is t, extra guidance is always given, if the value is
1565 nil, extra guidance is always suppressed.
1567 If the value is `complex-only', only complex input methods such as
1568 `chinese-py' and `japanese' give extra guidance.
1570 If the value is `default', complex input methods always give extra
1571 guidance, but simple input methods give it only when you are not in
1574 See also the variable `input-method-highlight-flag'."
1575 :type
'(choice (const :tag
"Always" t
) (const :tag
"Never" nil
)
1576 (const complex-only
) (const default
))
1579 (defcustom input-method-highlight-flag t
1580 "*If this flag is non-nil, input methods highlight partially-entered text.
1581 For instance, while you are in the middle of a Quail input method sequence,
1582 the text inserted so far is temporarily underlined.
1583 The underlining goes away when you finish or abort the input method sequence.
1584 See also the variable `input-method-verbose-flag'."
1588 (defvar input-method-activate-hook nil
1589 "Normal hook run just after an input method is activated.
1591 The variable `current-input-method' keeps the input method name
1594 (defvar input-method-inactivate-hook nil
1595 "Normal hook run just after an input method is inactivated.
1597 The variable `current-input-method' still keeps the input method name
1600 (defvar input-method-after-insert-chunk-hook nil
1601 "Normal hook run just after an input method insert some chunk of text.")
1603 (defvar input-method-exit-on-first-char nil
1604 "This flag controls when an input method returns.
1605 Usually, the input method does not return while there's a possibility
1606 that it may find a different translation if a user types another key.
1607 But, it this flag is non-nil, the input method returns as soon as
1608 the current key sequence gets long enough to have some valid translation.")
1610 (defvar input-method-use-echo-area nil
1611 "This flag controls how an input method shows an intermediate key sequence.
1612 Usually, the input method inserts the intermediate key sequence,
1613 or candidate translations corresponding to the sequence,
1614 at point in the current buffer.
1615 But, if this flag is non-nil, it displays them in echo area instead.")
1617 (defvar input-method-exit-on-invalid-key nil
1618 "This flag controls the behavior of an input method on invalid key input.
1619 Usually, when a user types a key which doesn't start any character
1620 handled by the input method, the key is handled by turning off the
1621 input method temporarily. After that key, the input method is re-enabled.
1622 But, if this flag is non-nil, the input method is never back on.")
1625 (defvar set-language-environment-hook nil
1626 "Normal hook run after some language environment is set.
1628 When you set some hook function here, that effect usually should not
1629 be inherited to another language environment. So, you had better set
1630 another function in `exit-language-environment-hook' (which see) to
1631 cancel the effect.")
1633 (defvar exit-language-environment-hook nil
1634 "Normal hook run after exiting from some language environment.
1635 When this hook is run, the variable `current-language-environment'
1636 is still bound to the language environment being exited.
1638 This hook is mainly used for canceling the effect of
1639 `set-language-environment-hook' (which-see).")
1641 (put 'setup-specified-language-environment
'apropos-inhibit t
)
1643 (defun setup-specified-language-environment ()
1644 "Switch to a specified language environment."
1646 (let (language-name)
1647 (if (and (symbolp last-command-event
)
1648 (or (not (eq last-command-event
'Default
))
1649 (setq last-command-event
'English
))
1650 (setq language-name
(symbol-name last-command-event
)))
1652 (set-language-environment language-name
)
1653 (customize-mark-as-set 'current-language-environment
))
1654 (error "Bogus calling sequence"))))
1656 (defcustom current-language-environment
"English"
1657 "The last language environment specified with `set-language-environment'.
1658 This variable should be set only with \\[customize], which is equivalent
1659 to using the function `set-language-environment'."
1660 :link
'(custom-manual "(emacs)Language Environments")
1661 :set
(lambda (symbol value
) (set-language-environment value
))
1663 (or (car-safe (assoc-string
1664 (if (symbolp current-language-environment
)
1665 (symbol-name current-language-environment
)
1666 current-language-environment
)
1667 language-info-alist t
))
1669 ;; custom type will be updated with `set-language-info'.
1670 :type
(if language-info-alist
1671 (cons 'choice
(mapcar
1674 (sort (mapcar 'car language-info-alist
) 'string
<)))
1676 :initialize
'custom-initialize-default
1679 (defun reset-language-environment ()
1680 "Reset multilingual environment of Emacs to the default status.
1682 The default status is as follows:
1684 The default value of `buffer-file-coding-system' is nil.
1685 The default coding system for process I/O is nil.
1686 The default value for the command `set-terminal-coding-system' is nil.
1687 The default value for the command `set-keyboard-coding-system' is nil.
1689 The order of priorities of coding categories and the coding system
1690 bound to each category are as follows
1691 coding category coding system
1692 --------------------------------------------------
1693 coding-category-iso-8-1 iso-latin-1
1694 coding-category-iso-8-2 iso-latin-1
1695 coding-category-utf-8 mule-utf-8
1696 coding-category-utf-16-be mule-utf-16be-with-signature
1697 coding-category-utf-16-le mule-utf-16le-with-signature
1698 coding-category-iso-7-tight iso-2022-jp
1699 coding-category-iso-7 iso-2022-7bit
1700 coding-category-iso-7-else iso-2022-7bit-lock
1701 coding-category-iso-8-else iso-2022-8bit-ss2
1702 coding-category-emacs-mule emacs-mule
1703 coding-category-raw-text raw-text
1704 coding-category-sjis japanese-shift-jis
1705 coding-category-big5 chinese-big5
1706 coding-category-ccl nil
1707 coding-category-binary no-conversion"
1709 ;; This function formerly set default-enable-multibyte-characters to t,
1710 ;; but that is incorrect. It should not alter the unibyte/multibyte choice.
1712 (setq coding-category-iso-7-tight
'iso-2022-jp
1713 coding-category-iso-7
'iso-2022-7bit
1714 coding-category-iso-8-1
'iso-latin-1
1715 coding-category-iso-8-2
'iso-latin-1
1716 coding-category-iso-7-else
'iso-2022-7bit-lock
1717 coding-category-iso-8-else
'iso-2022-8bit-ss2
1718 coding-category-emacs-mule
'emacs-mule
1719 coding-category-raw-text
'raw-text
1720 coding-category-sjis
'japanese-shift-jis
1721 coding-category-big5
'chinese-big5
1722 coding-category-utf-16-be
'mule-utf-16be-with-signature
1723 coding-category-utf-16-le
'mule-utf-16le-with-signature
1724 coding-category-utf-8
'mule-utf-8
1725 coding-category-ccl nil
1726 coding-category-binary
'no-conversion
)
1728 (set-coding-priority
1729 '(coding-category-iso-8-1
1730 coding-category-iso-8-2
1731 coding-category-utf-8
1732 coding-category-utf-16-be
1733 coding-category-utf-16-le
1734 coding-category-iso-7-tight
1735 coding-category-iso-7
1736 coding-category-iso-7-else
1737 coding-category-iso-8-else
1738 coding-category-emacs-mule
1739 coding-category-raw-text
1740 coding-category-sjis
1741 coding-category-big5
1743 coding-category-binary
))
1745 ;; Changing the binding of a coding category requires this call.
1746 (update-coding-systems-internal)
1748 (set-default-coding-systems nil
)
1749 (setq default-sendmail-coding-system
'iso-latin-1
)
1750 ;; On Darwin systems, this should be utf-8, but when this file is loaded
1751 ;; utf-8 is not yet defined, so we set it in set-locale-environment instead.
1752 (setq default-file-name-coding-system
'iso-latin-1
)
1753 ;; Preserve eol-type from existing default-process-coding-systems.
1754 ;; On non-unix-like systems in particular, these may have been set
1755 ;; carefully by the user, or by the startup code, to deal with the
1756 ;; users shell appropriately, so should not be altered by changing
1757 ;; language environment.
1758 (let ((output-coding
1759 ;; When bootstrapping, coding-systems are not defined yet, so
1760 ;; we need to catch the error from check-coding-system.
1762 (coding-system-change-text-conversion
1763 (car default-process-coding-system
) 'undecided
)
1764 (coding-system-error 'undecided
)))
1767 (coding-system-change-text-conversion
1768 (cdr default-process-coding-system
) 'iso-latin-1
)
1769 (coding-system-error 'iso-latin-1
))))
1770 (setq default-process-coding-system
1771 (cons output-coding input-coding
)))
1773 ;; Don't alter the terminal and keyboard coding systems here.
1774 ;; The terminal still supports the same coding system
1775 ;; that it supported a minute ago.
1776 ;; (set-terminal-coding-system-internal nil)
1777 ;; (set-keyboard-coding-system-internal nil)
1779 (setq nonascii-translation-table nil
1780 nonascii-insert-offset
0)
1782 ;; Don't invoke fontset-related functions if fontsets aren't
1783 ;; supported in this build of Emacs.
1784 (and (fboundp 'fontset-list
)
1785 (set-overriding-fontspec-internal nil
)))
1787 (reset-language-environment)
1789 (defun set-display-table-and-terminal-coding-system (language-name &optional coding-system display
)
1790 "Set up the display table and terminal coding system for LANGUAGE-NAME."
1791 (let ((coding (get-language-info language-name
'unibyte-display
)))
1793 (standard-display-european-internal)
1794 ;; The following 2 lines undo the 8-bit display that we set up
1795 ;; in standard-display-european-internal, which see. This is in
1796 ;; case the user has used standard-display-european earlier in
1797 ;; this session. (The MS-DOS port doesn't use that setup, so it
1798 ;; doesn't need to undo it.)
1799 (when standard-display-table
1801 (aset standard-display-table
(+ i
128) nil
))))
1802 (or (eq window-system
'pc
)
1803 (set-terminal-coding-system (or coding-system coding
) display
))))
1805 (defun set-language-environment (language-name)
1806 "Set up multi-lingual environment for using LANGUAGE-NAME.
1807 This sets the coding system priority and the default input method
1808 and sometimes other things. LANGUAGE-NAME should be a string
1809 which is the name of a language environment. For example, \"Latin-1\"
1810 specifies the character set for the major languages of Western Europe."
1811 (interactive (list (read-language-name
1813 "Set language environment (default English): ")))
1815 (if (symbolp language-name
)
1816 (setq language-name
(symbol-name language-name
)))
1817 (setq language-name
"English"))
1818 (let ((slot (assoc-string language-name language-info-alist t
)))
1820 (error "Language environment not defined: %S" language-name
))
1821 (setq language-name
(car slot
)))
1822 (if current-language-environment
1823 (let ((func (get-language-info current-language-environment
1825 (run-hooks 'exit-language-environment-hook
)
1826 (if (functionp func
) (funcall func
))))
1827 (let ((default-eol-type (coding-system-eol-type
1828 default-buffer-file-coding-system
)))
1829 (reset-language-environment)
1831 ;; The features might set up coding systems.
1832 (let ((required-features (get-language-info language-name
'features
)))
1833 (while required-features
1834 (require (car required-features
))
1835 (setq required-features
(cdr required-features
))))
1837 (setq current-language-environment language-name
)
1838 (set-language-environment-coding-systems language-name default-eol-type
))
1839 (let ((input-method (get-language-info language-name
'input-method
)))
1841 (setq default-input-method input-method
)
1842 (if input-method-history
1843 (setq input-method-history
1845 (delete input-method input-method-history
))))))
1846 (let ((nonascii (get-language-info language-name
'nonascii-translation
))
1848 (if (eq window-system
'pc
)
1850 (format "cp%d-nonascii-translation-table" dos-codepage
)))))
1852 ((char-table-p nonascii
)
1853 (setq nonascii-translation-table nonascii
))
1854 ((and (eq window-system
'pc
) (boundp dos-table
))
1855 ;; DOS terminals' default is to use a special non-ASCII translation
1856 ;; table as appropriate for the installed codepage.
1857 (setq nonascii-translation-table
(symbol-value dos-table
)))
1858 ((charsetp nonascii
)
1859 (setq nonascii-insert-offset
(- (make-char nonascii
) 128)))))
1861 ;; Unibyte setups if necessary.
1862 (unless default-enable-multibyte-characters
1863 ;; Syntax and case table.
1864 (let ((syntax (get-language-info language-name
'unibyte-syntax
)))
1866 (let ((set-case-syntax-set-multibyte nil
))
1867 (load syntax nil t
))
1868 ;; No information for syntax and case. Reset to the defaults.
1869 (let ((syntax-table (standard-syntax-table))
1870 (standard-table (standard-case-table))
1871 (case-table (make-char-table 'case-table
))
1872 (ch (if (eq window-system
'pc
) 128 160)))
1874 (modify-syntax-entry ch
" " syntax-table
)
1877 (aset case-table i
(aref standard-table i
)))
1878 (set-char-table-extra-slot case-table
0 nil
)
1879 (set-char-table-extra-slot case-table
1 nil
)
1880 (set-char-table-extra-slot case-table
2 nil
)
1881 (set-standard-case-table case-table
))
1882 (let ((list (buffer-list)))
1884 (with-current-buffer (car list
)
1885 (set-case-table (standard-case-table)))
1886 (setq list
(cdr list
))))))
1887 (set-display-table-and-terminal-coding-system language-name
))
1889 (let ((required-features (get-language-info language-name
'features
)))
1890 (while required-features
1891 (require (car required-features
))
1892 (setq required-features
(cdr required-features
))))
1894 ;; Don't invoke fontset-related functions if fontsets aren't
1895 ;; supported in this build of Emacs.
1896 (when (fboundp 'fontset-list
)
1897 (let ((overriding-fontspec (get-language-info language-name
1898 'overriding-fontspec
)))
1899 (if overriding-fontspec
1900 (set-overriding-fontspec-internal overriding-fontspec
))))
1902 (let ((func (get-language-info language-name
'setup-function
)))
1903 (if (functionp func
)
1905 (if (and utf-translate-cjk-mode
1906 (not (eq utf-translate-cjk-lang-env language-name
))
1908 (dolist (charset (get-language-info language-name
'charset
))
1909 (if (memq charset utf-translate-cjk-charsets
)
1912 (utf-translate-cjk-load-tables))
1913 (run-hooks 'set-language-environment-hook
)
1914 (force-mode-line-update t
))
1916 (defun standard-display-european-internal ()
1917 ;; Actually set up direct output of non-ASCII characters.
1918 (standard-display-8bit (if (eq window-system
'pc
) 128 160) 255)
1919 ;; Unibyte Emacs on MS-DOS wants to display all 8-bit characters with
1920 ;; the native font, and codes 160 and 146 stand for something very
1922 (or (and (eq window-system
'pc
) (not default-enable-multibyte-characters
))
1924 ;; Most X fonts used to do the wrong thing for latin-1 code 160.
1925 (unless (and (eq window-system
'x
)
1926 ;; XFree86 4 has fixed the fonts.
1927 (string= "The XFree86 Project, Inc" (x-server-vendor))
1928 (> (aref (number-to-string (nth 2 (x-server-version))) 0)
1930 ;; Make non-line-break space display as a plain space.
1931 (aset standard-display-table
160 [32]))
1932 ;; Most Windows programs send out apostrophes as \222. Most X fonts
1933 ;; don't contain a character at that position. Map it to the ASCII
1934 ;; apostrophe. [This is actually RIGHT SINGLE QUOTATION MARK,
1935 ;; U+2019, normally from the windows-1252 character set. XFree 4
1936 ;; fonts probably have the appropriate glyph at this position,
1937 ;; so they could use standard-display-8bit. It's better to use a
1938 ;; proper windows-1252 coding system. --fx]
1939 (aset standard-display-table 146 [39]))))
1941 (defun set-language-environment-coding-systems (language-name
1943 "Do various coding system setups for language environment LANGUAGE-NAME.
1945 The optional arg EOL-TYPE specifies the eol-type of the default value
1946 of `buffer-file-coding-system' set by this function."
1947 (let* ((priority (get-language-info language-name 'coding-priority))
1948 (default-coding (car priority)))
1950 (let ((categories (mapcar 'coding-system-category priority)))
1951 (set-default-coding-systems
1952 (if (memq eol-type '(0 1 2 unix dos mac))
1953 (coding-system-change-eol-conversion default-coding eol-type)
1955 (setq default-sendmail-coding-system default-coding)
1956 (set-coding-priority categories)
1958 (set (car categories) (car priority))
1959 (setq priority (cdr priority) categories (cdr categories)))
1960 ;; Changing the binding of a coding category requires this call.
1961 (update-coding-systems-internal)))))
1963 (defsubst princ-list (&rest args)
1964 "Print all arguments with `princ', then print \"\n\"."
1965 (while args (princ (car args)) (setq args (cdr args)))
1968 (put 'describe-specified-language-support 'apropos-inhibit t)
1970 ;; Print language-specific information such as input methods,
1971 ;; charsets, and coding systems. This function is intended to be
1972 ;; called from the menu:
1973 ;; [menu-bar mule describe-language-environment LANGUAGE]
1974 ;; and should not run it by `M-x describe-current-input-method-function'.
1975 (defun describe-specified-language-support ()
1976 "Describe how Emacs supports the specified language environment."
1978 (let (language-name)
1979 (if (not (and (symbolp last-command-event)
1980 (or (not (eq last-command-event 'Default))
1981 (setq last-command-event 'English))
1982 (setq language-name (symbol-name last-command-event))))
1983 (error "Bogus calling sequence"))
1984 (describe-language-environment language-name)))
1986 (defun describe-language-environment (language-name)
1987 "Describe how Emacs supports language environment LANGUAGE-NAME."
1989 (list (read-language-name
1991 "Describe language environment (default current choice): ")))
1992 (if (null language-name)
1993 (setq language-name current-language-environment))
1994 (if (or (null language-name)
1995 (null (get-language-info language-name 'documentation)))
1996 (error "No documentation for the specified language"))
1997 (if (symbolp language-name)
1998 (setq language-name (symbol-name language-name)))
1999 (dolist (feature (get-language-info language-name 'features))
2001 (let ((doc (get-language-info language-name 'documentation)))
2002 (help-setup-xref (list #'describe-language-environment language-name)
2004 (with-output-to-temp-buffer (help-buffer)
2006 (set-buffer standard-output)
2007 (insert language-name " language environment\n\n")
2009 (insert doc "\n\n"))
2011 (let ((str (eval (get-language-info language-name 'sample-text))))
2013 (insert "Sample text:\n " str "\n\n")))
2015 (let ((input-method (get-language-info language-name 'input-method))
2016 (l (copy-sequence input-method-alist)))
2017 (insert "Input methods")
2019 (insert " (default " input-method ")")
2020 (setq input-method (assoc input-method input-method-alist))
2021 (setq l (cons input-method (delete input-method l))))
2024 (when (string= language-name (nth 1 (car l)))
2025 (insert " " (car (car l)))
2026 (search-backward (car (car l)))
2027 (help-xref-button 0 'help-input-method (car (car l)))
2028 (goto-char (point-max))
2030 (if (stringp (nth 3 (car l)))
2032 (car (nth 3 (car l))))
2033 "\" in mode line)\n"))
2036 (insert "Character sets:\n")
2037 (let ((l (get-language-info language-name 'charset)))
2039 (insert " nothing specific to " language-name "\n")
2041 (insert " " (symbol-name (car l)))
2042 (search-backward (symbol-name (car l)))
2043 (help-xref-button 0 'help-character-set (car l))
2044 (goto-char (point-max))
2045 (insert ": " (charset-description (car l)) "\n")
2048 (insert "Coding systems:\n")
2049 (let ((l (get-language-info language-name 'coding-system)))
2051 (insert " nothing specific to " language-name "\n")
2053 (insert " " (symbol-name (car l)))
2054 (search-backward (symbol-name (car l)))
2055 (help-xref-button 0 'help-coding-system (car l))
2056 (goto-char (point-max))
2058 (coding-system-mnemonic (car l))
2059 "' in mode line):\n\t"
2060 (coding-system-doc-string (car l))
2062 (let ((aliases (coding-system-get (car l)
2063 'alias-coding-systems)))
2065 (insert "\t(alias:")
2067 (insert " " (symbol-name (car aliases)))
2068 (setq aliases (cdr aliases)))
2070 (setq l (cdr l)))))))))
2074 (defvar locale-translation-file-name nil
2075 "File name for the system's file of locale-name aliases, or nil if none.")
2077 ;; The following definitions might as well be marked as constants and
2078 ;; purecopied, since they're normally used on startup, and probably
2079 ;; should reflect the facilities of the base Emacs.
2080 (defconst locale-language-names
2083 ;; Locale names of the form LANGUAGE[_TERRITORY][.CODESET][@MODIFIER]
2084 ;; as specified in the Single Unix Spec, Version 2.
2085 ;; LANGUAGE is a language code taken from ISO 639:1988 (E/F)
2086 ;; with additions from ISO 639/RA Newsletter No.1/1989;
2087 ;; see Internet RFC 2165 (1997-06) and
2088 ;; http://www.evertype.com/standards/iso639/iso639-en.html
2089 ;; TERRITORY is a country code taken from ISO 3166
2090 ;; http://www.din.de/gremien/nas/nabd/iso3166ma/codlstp1/en_listp1.html.
2091 ;; CODESET and MODIFIER are implementation-dependent.
2093 ;; jasonr comments: MS Windows uses three letter codes for
2094 ;; languages instead of the two letter ISO codes that POSIX
2095 ;; uses. In most cases the first two letters are the same, so
2096 ;; most of the regexps in locale-language-names work. Japanese
2097 ;; and Chinese are exceptions, which are listed in the
2098 ;; non-standard section at the bottom of locale-language-names.
2100 ("aa_DJ" . "Latin-1") ; Afar
2103 ("af" . "Latin-1") ; Afrikaans
2104 ("am" "Ethiopic" utf-8) ; Amharic
2105 ("an" . "Latin-9") ; Aragonese
2106 ; ar Arabic glibc uses 8859-6
2109 ("az" . "UTF-8") ; Azerbaijani
2111 ("be" "Belarusian" cp1251) ; Belarusian [Byelorussian until early 1990s]
2112 ("bg" "Bulgarian" cp1251) ; Bulgarian
2115 ("bn" . "UTF-8") ; Bengali, Bangla
2117 ("br" . "Latin-1") ; Breton
2118 ("bs" . "Latin-2") ; Bosnian
2119 ("byn" . "UTF-8") ; Bilin; Blin
2120 ("ca" . "Latin-1") ; Catalan
2122 ("cs" "Czech" iso-8859-2)
2123 ("cy" "Welsh" iso-8859-14)
2124 ("da" . "Latin-1") ; Danish
2125 ("de" "German" iso-8859-1)
2127 ("el" "Greek" iso-8859-7)
2128 ;; Users who specify "en" explicitly typically want Latin-1, not ASCII.
2129 ;; That's actually what the GNU locales define, modulo things like
2131 ("en_IN" "English" utf-8) ; glibc uses utf-8 for English in India
2132 ("en" . "Latin-1") ; English
2133 ("eo" . "Latin-3") ; Esperanto
2134 ("es" "Spanish" iso-8859-1)
2135 ("et" . "Latin-1") ; Estonian
2136 ("eu" . "Latin-1") ; Basque
2137 ("fa" . "UTF-8") ; Persian
2138 ("fi" . "Latin-1") ; Finnish
2139 ("fj" . "Latin-1") ; Fiji
2140 ("fo" . "Latin-1") ; Faroese
2141 ("fr" "French" iso-8859-1) ; French
2142 ("fy" . "Latin-1") ; Frisian
2143 ("ga" . "Latin-1") ; Irish Gaelic (new orthography)
2144 ("gd" . "Latin-9") ; Scots Gaelic
2145 ("gez" "Ethiopic" utf-8) ; Geez
2146 ("gl" . "Latin-1") ; Gallegan; Galician
2148 ("gu" . "UTF-8") ; Gujarati
2149 ("gv" . "Latin-1") ; Manx Gaelic
2151 ("he" "Hebrew" iso-8859-8)
2152 ("hi" "Devanagari" utf-8) ; Hindi
2153 ("hr" "Croatian" iso-8859-2) ; Croatian
2154 ("hu" . "Latin-2") ; Hungarian
2157 ("id" . "Latin-1") ; Indonesian
2160 ("is" . "Latin-1") ; Icelandic
2161 ("it" "Italian" iso-8859-1) ; Italian
2163 ("iw" "Hebrew" iso-8859-8)
2164 ("ja" "Japanese" euc-jp)
2166 ("ka" "Georgian" georgian-ps) ; Georgian
2168 ("kl" . "Latin-1") ; Greenlandic
2170 ("kn" "Kannada" utf-8)
2171 ("ko" "Korean" euc-kr)
2174 ("kw" . "Latin-1") ; Cornish
2176 ("la" . "Latin-1") ; Latin
2177 ("lb" . "Latin-1") ; Luxemburgish
2178 ("lg" . "Laint-6") ; Ganda
2180 ("lo" "Lao" utf-8) ; Laothian
2181 ("lt" "Lithuanian" iso-8859-13)
2182 ("lv" . "Latvian") ; Latvian, Lettish
2184 ("mi" . "Latin-7") ; Maori
2185 ("mk" "Cyrillic-ISO" iso-8859-5) ; Macedonian
2186 ("ml" "Malayalam" utf-8)
2187 ("mn" . "UTF-8") ; Mongolian
2189 ("mr" "Devanagari" utf-8) ; Marathi
2190 ("ms" . "Latin-1") ; Malay
2191 ("mt" . "Latin-3") ; Maltese
2194 ("nb" . "Latin-1") ; Norwegian
2195 ("ne" "Devanagari" utf-8) ; Nepali
2196 ("nl" "Dutch" iso-8859-1)
2197 ("no" . "Latin-1") ; Norwegian
2198 ("oc" . "Latin-1") ; Occitan
2199 ("om_ET" . "UTF-8") ; (Afan) Oromo
2200 ("om" . "Latin-1") ; (Afan) Oromo
2202 ("pa" . "UTF-8") ; Punjabi
2203 ("pl" . "Latin-2") ; Polish
2205 ("pt" . "Latin-1") ; Portuguese
2207 ("rm" . "Latin-1") ; Rhaeto-Romanic
2209 ("ro" "Romanian" iso-8859-2)
2210 ("ru_RU" "Russian" iso-8859-5)
2211 ("ru_UA" "Russian" koi8-u)
2213 ("sa" . "Devanagari") ; Sanskrit
2215 ("se" . "UTF-8") ; Northern Sami
2217 ("sh" . "Latin-2") ; Serbo-Croatian
2219 ("sid" . "UTF-8") ; Sidamo
2220 ("sk" "Slovak" iso-8859-2)
2221 ("sl" "Slovenian" iso-8859-2)
2224 ("so_ET" "UTF-8") ; Somali
2225 ("so" "Latin-1") ; Somali
2226 ("sq" . "Latin-1") ; Albanian
2227 ("sr_YU@cyrillic" . "Cyrillic-ISO") ; Serbian (Cyrillic alphabet)
2228 ("sr" . "Latin-2") ; Serbian (Latin alphabet)
2230 ("st" . "Latin-1") ; Sesotho
2232 ("sv" "Swedish" iso-8859-1) ; Swedish
2233 ("sw" . "Latin-1") ; Swahili
2234 ("ta" "Tamil" utf-8)
2235 ("te" . "UTF-8") ; Telugu
2236 ("tg" "Tajik" koi8-t)
2237 ("th" "Thai" tis-620)
2238 ("ti" "Ethiopic" utf-8) ; Tigrinya
2239 ("tig_ER" . "UTF-8") ; Tigre
2241 ("tl" . "Latin-1") ; Tagalog
2244 ("tr" "Turkish" iso-8859-9)
2246 ("tt" . "UTF-8") ; Tatar
2249 ("uk" "Ukrainian" koi8-u)
2250 ("ur" . "UTF-8") ; Urdu
2251 ("uz_UZ@cyrillic" . "UTF-8"); Uzbek
2252 ("uz" . "Latin-1") ; Uzbek
2253 ("vi" "Vietnamese" utf-8)
2255 ("wa" . "Latin-1") ; Walloon
2257 ("xh" . "Latin-1") ; Xhosa
2258 ("yi" . "Windows-1255") ; Yiddish
2261 ("zh_HK" . "Chinese-Big5")
2262 ("zh_TW" . "Chinese-Big5")
2263 ("zh_CN" . "Chinese-GB")
2264 ("zh" . "Chinese-GB")
2265 ; zh_CN.GB18030/GB18030 \
2267 ; zh_HK/BIG5-HKSCS \
2268 ("zu" . "Latin-1") ; Zulu
2270 ;; ISO standard locales
2272 ("posix$" . "ASCII")
2274 ;; The "IPA" Emacs language environment does not correspond
2275 ;; to any ISO 639 code, so let it stand for itself.
2278 ;; Nonstandard or obsolete language codes
2279 ("cz" . "Czech") ; e.g. Solaris 2.6
2280 ("ee" . "Latin-4") ; Estonian, e.g. X11R6.4
2281 ("iw" . "Hebrew") ; e.g. X11R6.4
2282 ("sp" . "Cyrillic-ISO") ; Serbian (Cyrillic alphabet), e.g. X11R6.4
2283 ("su" . "Latin-1") ; Finnish, e.g. Solaris 2.6
2284 ("jp" . "Japanese") ; e.g. MS Windows
2285 ("chs" . "Chinese-GB") ; MS Windows Chinese Simplified
2286 ("cht" . "Chinese-BIG5") ; MS Windows Chinese Traditional
2288 "Alist of locale regexps vs the corresponding languages and coding systems.
2289 Each element has these form:
2290 \(LOCALE-REGEXP LANG-ENV CODING-SYSTEM)
2291 The first element whose LOCALE-REGEXP matches the start of a
2292 downcased locale specifies the LANG-ENV \(language environtment)
2293 and CODING-SYSTEM corresponding to that locale. If there is no
2294 appropriate language environment, the element may have this form:
2295 \(LOCALE-REGEXP . LANG-ENV)
2296 In this case, LANG-ENV is one of generic language environments for an
2297 specific encoding such as \"Latin-1\" and \"UTF-8\".")
2299 (defconst locale-charset-language-names
2301 '((".*8859[-_]?1\\>" . "Latin-1")
2302 (".*8859[-_]?2\\>" . "Latin-2")
2303 (".*8859[-_]?3\\>" . "Latin-3")
2304 (".*8859[-_]?4\\>" . "Latin-4")
2305 (".*8859[-_]?9\\>" . "Latin-5")
2306 (".*8859[-_]?14\\>" . "Latin-8")
2307 (".*8859[-_]?15\\>" . "Latin-9")
2308 (".*utf\\(?:-?8\\)?\\>" . "UTF-8")
2309 ;; utf-8@euro exists, so put this last. (@euro really specifies
2310 ;; the currency, rather than the charset.)
2311 (".*@euro\\>" . "Latin-9")))
2312 "List of pairs of locale regexps and charset language names.
2313 The first element whose locale regexp matches the start of a downcased locale
2314 specifies the language name whose charset corresponds to that locale.
2315 This language name is used if the locale is not listed in
2316 `locale-language-names'")
2318 (defconst locale-preferred-coding-systems
2320 '((".*8859[-_]?1\\>" . iso-8859-1)
2321 (".*8859[-_]?2\\>" . iso-8859-2)
2322 (".*8859[-_]?3\\>" . iso-8859-3)
2323 (".*8859[-_]?4\\>" . iso-8859-4)
2324 (".*8859[-_]?9\\>" . iso-8859-9)
2325 (".*8859[-_]?14\\>" . iso-8859-14)
2326 (".*8859[-_]?15\\>" . iso-8859-15)
2327 (".*utf\\(?:-?8\\)?" . utf-8)
2328 ;; utf-8@euro exists, so put this after utf-8. (@euro really
2329 ;; specifies the currency, rather than the charset.)
2330 (".*@euro" . iso-8859-15)
2331 ("koi8-?r" . koi8-r)
2332 ("koi8-?u" . koi8-u)
2335 ("euc-?tw" . euc-tw)
2336 ;; We don't support GBK, but as it is upper compatible with
2337 ;; GB-2312, we setup the default coding system to gb2312.
2339 ;; We don't support BIG5-HKSCS, but as it is upper compatible with
2340 ;; BIG5, we setup the default coding system to big5.
2341 ("big5hkscs" . big5)
2342 ("ja.*[._]euc" . japanese-iso-8bit)
2343 ("ja.*[._]jis7" . iso-2022-jp)
2344 ("ja.*[._]pck" . japanese-shift-jis)
2345 ("ja.*[._]sjis" . japanese-shift-jis)
2346 ("jpn" . japanese-shift-jis) ; MS-Windows uses this.
2348 "List of pairs of locale regexps and preferred coding systems.
2349 The first element whose locale regexp matches the start of a downcased locale
2350 specifies the coding system to prefer when using that locale.
2351 This coding system is used if the locale specifies a specific charset.")
2353 (defun locale-name-match (key alist)
2354 "Search for KEY in ALIST, which should be a list of regexp-value pairs.
2355 Return the value corresponding to the first regexp that matches the
2356 start of KEY, or nil if there is no match."
2358 (while (and alist (not element))
2359 (if (string-match (concat "\\`\\(?:" (car (car alist)) "\\)") key)
2360 (setq element (car alist)))
2361 (setq alist (cdr alist)))
2364 (defun locale-charset-match-p (charset1 charset2)
2365 "Whether charset names (strings) CHARSET1 and CHARSET2 are equivalent.
2366 Matching is done ignoring case and any hyphens and underscores in the
2367 names. E.g. `ISO_8859-1' and `iso88591' both match `iso-8859-1'."
2368 (setq charset1 (replace-regexp-in-string "[-_]" "" charset1))
2369 (setq charset2 (replace-regexp-in-string "[-_]" "" charset2))
2370 (eq t (compare-strings charset1 nil nil charset2 nil nil t)))
2372 (defvar locale-charset-alist nil
2373 "Coding system alist keyed on locale-style charset name.
2374 Used by `locale-charset-to-coding-system'.")
2376 (defun locale-charset-to-coding-system (charset)
2377 "Find coding system corresponding to CHARSET.
2378 CHARSET is any sort of non-Emacs charset name, such as might be used
2379 in a locale codeset, or elsewhere. It is matched to a coding system
2380 first by case-insensitive lookup in `locale-charset-alist'. Then
2381 matches are looked for in the coding system list, treating case and
2382 the characters `-' and `_' as insignificant. The coding system base
2383 is returned. Thus, for instance, if charset \"ISO8859-2\",
2384 `iso-latin-2' is returned."
2385 (or (car (assoc-string charset locale-charset-alist t))
2386 (let ((cs coding-system-alist)
2388 (while (and (not c) cs)
2389 (if (locale-charset-match-p charset (caar cs))
2390 (setq c (intern (caar cs)))
2392 (if c (coding-system-base c)))))
2394 ;; Fixme: This ought to deal with the territory part of the locale
2395 ;; too, for setting things such as calendar holidays, ps-print paper
2396 ;; size, spelling dictionary.
2398 (defun set-locale-environment (&optional locale-name display)
2399 "Set up multi-lingual environment for using LOCALE-NAME.
2400 This sets the language environment, the coding system priority,
2401 the default input method and sometimes other things.
2403 LOCALE-NAME should be a string which is the name of a locale supported
2404 by the system. Often it is of the form xx_XX.CODE, where xx is a
2405 language, XX is a country, and CODE specifies a character set and
2406 coding system. For example, the locale name \"ja_JP.EUC\" might name
2407 a locale for Japanese in Japan using the `japanese-iso-8bit'
2408 coding-system. The name may also have a modifier suffix, e.g. `@euro'
2411 If LOCALE-NAME is nil, its value is taken from the environment
2412 variables LC_ALL, LC_CTYPE and LANG (the first one that is set).
2414 The locale names supported by your system can typically be found in a
2415 directory named `/usr/share/locale' or `/usr/lib/locale'. LOCALE-NAME
2416 will be translated according to the table specified by
2417 `locale-translation-file-name'.
2419 If DISPLAY is non-nil, only set the keyboard coding system and
2420 the terminal coding system for the given display, and don't touch
2421 session-global parameters like the language environment. DISPLAY
2422 may be a display id or a frame.
2424 See also `locale-charset-language-names', `locale-language-names',
2425 `locale-preferred-coding-systems' and `locale-coding-system'."
2426 (interactive "sSet environment for locale: ")
2428 ;; Do this at runtime for the sake of binaries possibly transported
2429 ;; to a system without X.
2430 (setq locale-translation-file-name
2432 '("/usr/lib/X11/locale/locale.alias" ; e.g. X11R6.4
2433 "/usr/X11R6/lib/X11/locale/locale.alias" ; XFree86, e.g. RedHat 4.2
2434 "/usr/openwin/lib/locale/locale.alias" ; e.g. Solaris 2.6
2436 ;; The following name appears after the X-related names above,
2437 ;; since the X-related names are what X actually uses.
2438 "/usr/share/locale/locale.alias" ; GNU/Linux sans X
2440 (while (and files (not (file-exists-p (car files))))
2441 (setq files (cdr files)))
2444 (let ((locale locale-name))
2447 ;; Use the first of these three environment variables
2448 ;; that has a nonempty value.
2449 (let ((vars '("LC_ALL" "LC_CTYPE" "LANG")))
2451 (= 0 (length locale))) ; nil or empty string
2452 (setq locale (terminal-getenv (pop vars))))))
2455 ;; The two tests are kept separate so the byte-compiler sees
2456 ;; that mac-get-preference is only called after checking its existence.
2457 (when (fboundp 'mac-get-preference)
2458 (setq locale (mac-get-preference "AppleLocale"))
2460 (let ((languages (mac-get-preference "AppleLanguages")))
2461 (unless (= (length languages) 0) ; nil or empty vector
2462 (setq locale (aref languages 0)))))))
2463 (unless (or locale (not (boundp 'mac-system-locale)))
2464 (setq locale mac-system-locale))
2468 ;; Translate "swedish" into "sv_SE.ISO8859-1", and so on,
2469 ;; using the translation file that many systems have.
2470 (when locale-translation-file-name
2472 (insert-file-contents locale-translation-file-name)
2473 (when (re-search-forward
2474 (concat "^" (regexp-quote locale) ":?[ \t]+") nil t)
2475 (setq locale (buffer-substring (point) (line-end-position))))))
2477 ;; Leave the system locales alone if the caller did not specify
2478 ;; an explicit locale name, as their defaults are set from
2479 ;; LC_MESSAGES and LC_TIME, not LC_CTYPE, and the user might not
2480 ;; want to set them to the same value as LC_CTYPE.
2482 (setq system-messages-locale locale)
2483 (setq system-time-locale locale))
2485 (setq locale (downcase locale))
2487 (let ((language-name
2488 (locale-name-match locale locale-language-names))
2489 (charset-language-name
2490 (locale-name-match locale locale-charset-language-names))
2492 (or (locale-name-match locale locale-preferred-coding-systems)
2494 (if (string-match "\\.\\([^@]+\\)" locale)
2495 (locale-charset-to-coding-system
2496 (match-string 1 locale))))
2497 (and (eq system-type 'macos) mac-system-coding-system))))
2499 (if (consp language-name)
2500 ;; locale-language-names specify both lang-env and coding.
2501 ;; But, what specified in locale-preferred-coding-systems
2502 ;; has higher priority.
2503 (setq coding-system (or coding-system
2504 (nth 1 language-name))
2505 language-name (car language-name))
2506 ;; Otherwise, if locale is not listed in locale-language-names,
2507 ;; use what listed in locale-charset-language-names.
2508 (if (not language-name)
2509 (setq language-name charset-language-name)))
2513 ;; Set up for this character set. This is now the right way
2514 ;; to do it for both unibyte and multibyte modes.
2516 (set-language-environment language-name))
2518 ;; If default-enable-multibyte-characters is nil,
2519 ;; we are using single-byte characters,
2520 ;; so the display table and terminal coding system are irrelevant.
2521 (when default-enable-multibyte-characters
2522 (set-display-table-and-terminal-coding-system
2523 language-name coding-system display))
2525 ;; Set the `keyboard-coding-system' if appropriate (tty
2526 ;; only). At least X and MS Windows can generate
2527 ;; multilingual input.
2528 ;; XXX This was disabled unless `window-system', but that
2529 ;; leads to buggy behaviour when a tty frame is opened
2530 ;; later. Setting the keyboard coding system has no adverse
2531 ;; effect on X, so let's do it anyway. -- Lorentey
2532 (let ((kcs (or coding-system
2533 (car (get-language-info language-name
2535 (if kcs (set-keyboard-coding-system kcs display)))
2538 (setq locale-coding-system
2539 (car (get-language-info language-name 'coding-priority)))))
2541 (when (and (not display)
2543 (not (coding-system-equal coding-system
2544 locale-coding-system)))
2545 (prefer-coding-system coding-system)
2546 (setq locale-coding-system coding-system))))
2548 ;; On Windows, override locale-coding-system,
2549 ;; keyboard-coding-system with system codepage. Note:
2550 ;; selection-coding-system is already set in w32select.c.
2551 (when (boundp 'w32-ansi-code-page)
2552 (let ((code-page-coding (intern (format "cp%d" w32-ansi-code-page))))
2553 (when (coding-system-p code-page-coding)
2554 (unless display (setq locale-coding-system code-page-coding))
2555 (set-keyboard-coding-system code-page-coding display)
2556 (set-terminal-coding-system code-page-coding display))))
2558 (when (eq system-type 'darwin)
2559 ;; On Darwin, file names are always encoded in utf-8, no matter
2561 (setq default-file-name-coding-system 'utf-8)
2562 ;; Mac OS X's Terminal.app by default uses utf-8 regardless of
2564 (when (and (null window-system)
2565 (equal (terminal-getenv "TERM_PROGRAM") "Apple_Terminal"))
2566 (set-terminal-coding-system 'utf-8)
2567 (set-keyboard-coding-system 'utf-8)))
2569 ;; Default to A4 paper if we're not in a C, POSIX or US locale.
2570 ;; (See comments in Flocale_info.)
2572 (let ((locale locale)
2573 (paper (locale-info 'paper)))
2575 ;; This will always be null at the time of writing.
2577 ((equal paper '(216 279))
2578 (setq ps-paper-type 'letter))
2579 ((equal paper '(210 297))
2580 (setq ps-paper-type 'a4)))
2581 (let ((vars '("LC_ALL" "LC_PAPER" "LANG")))
2582 (while (and vars (= 0 (length locale)))
2583 (setq locale (terminal-getenv (pop vars)))))
2585 ;; As of glibc 2.2.5, these are the only US Letter locales,
2586 ;; and the rest are A4.
2588 (or (locale-name-match locale '(("c$" . letter)
2593 ("enu$" . letter) ; Windows
2600 ;;; Charset property
2602 (defun get-charset-property (charset propname)
2603 "Return the value of CHARSET's PROPNAME property.
2604 This is the last value stored with
2605 (put-charset-property CHARSET PROPNAME VALUE)."
2606 (and (not (eq charset 'composition))
2607 (plist-get (charset-plist charset) propname)))
2609 (defun put-charset-property (charset propname value)
2610 "Store CHARSETS's PROPNAME property with value VALUE.
2611 It can be retrieved with `(get-charset-property CHARSET PROPNAME)'."
2612 (or (eq charset 'composition)
2613 (set-charset-plist charset
2614 (plist-put (charset-plist charset) propname value))))
2616 ;;; Character code property
2617 (put 'char-code-property-table 'char-table-extra-slots 0)
2619 (defvar char-code-property-table
2620 (make-char-table 'char-code-property-table)
2621 "Char-table containing a property list of each character code.
2623 See also the documentation of `get-char-code-property' and
2624 `put-char-code-property'.")
2626 (defun get-char-code-property (char propname)
2627 "Return the value of CHAR's PROPNAME property in `char-code-property-table'."
2628 (let ((plist (aref char-code-property-table char)))
2630 (car (cdr (memq propname plist))))))
2632 (defun put-char-code-property (char propname value)
2633 "Store CHAR's PROPNAME property with VALUE in `char-code-property-table'.
2634 It can be retrieved with `(get-char-code-property CHAR PROPNAME)'."
2635 (let ((plist (aref char-code-property-table char)))
2637 (let ((slot (memq propname plist)))
2639 (setcar (cdr slot) value)
2640 (nconc plist (list propname value))))
2641 (aset char-code-property-table char (list propname value)))))
2644 ;; Pretty description of encoded string
2646 ;; Alist of ISO 2022 control code vs the corresponding mnemonic string.
2647 (defvar iso-2022-control-alist
2655 (defun encoded-string-description (str coding-system)
2656 "Return a pretty description of STR that is encoded by CODING-SYSTEM."
2657 (setq str (string-as-unibyte str))
2659 (if (and coding-system (eq (coding-system-type coding-system) 2))
2660 ;; Try to get a pretty description for ISO 2022 escape sequences.
2661 (function (lambda (x) (or (cdr (assq x iso-2022-control-alist))
2662 (format "0x%02X" x))))
2663 (function (lambda (x) (format "0x%02X" x))))
2666 (defun encode-coding-char (char coding-system)
2667 "Encode CHAR by CODING-SYSTEM and return the resulting string.
2668 If CODING-SYSTEM can't safely encode CHAR, return nil."
2669 (let ((str1 (string-as-multibyte (char-to-string char)))
2670 (str2 (string-as-multibyte (make-string 2 char)))
2671 (safe-chars (and coding-system
2672 (coding-system-get coding-system 'safe-chars)))
2673 (charset (char-charset char))
2675 (when (or (eq safe-chars t)
2677 (and safe-chars (aref safe-chars char)))
2678 ;; We must find the encoded string of CHAR. But, just encoding
2679 ;; CHAR will put extra control sequences (usually to designate
2680 ;; ASCII charset) at the tail if type of CODING is ISO 2022.
2681 ;; To exclude such tailing bytes, we at first encode one-char
2682 ;; string and two-char string, then check how many bytes at the
2683 ;; tail of both encoded strings are the same.
2685 (setq enc1 (encode-coding-string str1 coding-system)
2687 enc2 (encode-coding-string str2 coding-system)
2689 (while (and (> i1 0) (= (aref enc1 (1- i1)) (aref enc2 (1- i2))))
2690 (setq i1 (1- i1) i2 (1- i2)))
2692 ;; Now (substring enc1 i1) and (substring enc2 i2) are the same,
2693 ;; and they are the extra control sequences at the tail to
2695 (substring enc2 0 i2))))
2698 ;; arch-tag: b382c432-4b36-460e-bf4c-05efd0bb18dc
2699 ;;; mule-cmds.el ends here