1 ;;; mule-cmds.el --- Commands for multilingual environment
3 ;; Copyright (C) 1995,1999 Electrotechnical Laboratory, JAPAN.
4 ;; Licensed to the Free Software Foundation.
5 ;; Copyright (C) 1997 MORIOKA Tomohiko
7 ;; Keywords: mule, multilingual
9 ;; This file is part of XEmacs.
11 ;; XEmacs is free software; you can redistribute it and/or modify it
12 ;; under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; XEmacs is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26 ;; Note: Some of the code here is now in code-cmds.el
30 ;;; MULE related key bindings and menus.
34 ;; Preserve the old name
35 (defvaralias 'mule-keymap 'coding-keymap)
37 (define-key mule-keymap "x" 'set-selection-coding-system)
38 (define-key mule-keymap "X" 'set-next-selection-coding-system)
39 (define-key mule-keymap "\C-\\" 'set-input-method)
40 ;;(define-key mule-keymap "c" 'list-coding-system-briefly) ; XEmacs
41 (define-key mule-keymap "C" 'describe-coding-system) ; XEmacs
42 (define-key mule-keymap "r" 'toggle-display-direction) ; XEmacs
43 (define-key mule-keymap "l" 'set-language-environment)
45 (define-key help-map "L" 'describe-language-environment)
46 (define-key help-map "\C-\\" 'describe-input-method)
47 (define-key help-map "I" 'describe-input-method)
48 (define-key help-map "h" 'view-hello-file)
50 ;; Menu for XEmacs were moved to menubar-items.el.
53 ;; This should be a single character key binding because users use it
54 ;; very frequently while editing multilingual text. Now we can use
55 ;; only two such keys: "\C-\\" and "\C-^", but the latter is not
56 ;; convenient because it requires shifting on most keyboards. An
57 ;; alternative is "\C-\]" which is now bound to `abort-recursive-edit'
58 ;; but it won't be used that frequently.
59 (define-key global-map "\C-\\" 'toggle-input-method)
61 ;;; This is no good because people often type Shift-SPC
62 ;;; meaning to type SPC. -- rms.
63 ;;; ;; Here's an alternative key binding for X users (Shift-SPACE).
64 ;;; (define-key global-map [?\S- ] 'toggle-input-method)
66 (defun coding-system-change-eol-conversion (coding-system eol-type)
67 "Return a coding system which differs from CODING-SYSTEM in eol conversion.
68 The returned coding system converts end-of-line by EOL-TYPE
69 but text as the same way as CODING-SYSTEM.
70 EOL-TYPE should be `lf', `crlf', `cr' or nil.
71 If EOL-TYPE is nil, the returned coding system detects
72 how end-of-line is formatted automatically while decoding.
74 EOL-TYPE can be specified by an symbol `unix', `dos' or `mac'.
75 They means `lf', `crlf', and `cr' respectively."
76 (if (symbolp eol-type)
77 (setq eol-type (cond ((or (eq eol-type 'unix)
80 ((or (eq eol-type 'dos)
83 ((or (eq eol-type 'mac)
87 (let ((orig-eol-type (coding-system-eol-type coding-system)))
88 (if (null orig-eol-type)
91 (coding-system-property coding-system eol-type))
92 (let ((base (coding-system-base coding-system)))
95 (if (eq eol-type orig-eol-type)
97 (setq orig-eol-type (coding-system-eol-type base))
98 (if (null orig-eol-type)
99 (coding-system-property base eol-type))))))))
101 ;; (defun coding-system-change-text-conversion (coding-system coding)
102 ;; "Return a coding system which differs from CODING-SYSTEM in text conversion.
103 ;; The returned coding system converts text by CODING
104 ;; but end-of-line as the same way as CODING-SYSTEM.
105 ;; If CODING is nil, the returned coding system detects
106 ;; how text is formatted automatically while decoding."
108 ;; (coding-system-base coding-system)
109 ;; (let ((eol-type (coding-system-eol-type coding-system)))
110 ;; (coding-system-change-eol-conversion
112 ;; (if (numberp eol-type) (aref [unix dos mac] eol-type))))))
114 (defun view-hello-file ()
115 "Display the HELLO file which list up many languages and characters."
117 ;; We have to decode the file in any environment.
118 (let ((coding-system-for-read 'iso-2022-7bit))
119 (find-file-read-only (expand-file-name "HELLO" data-directory))))
122 ;;; Language support stuff.
124 (defvar language-info-alist nil
125 "Alist of language environment definitions.
126 Each element looks like:
127 (LANGUAGE-NAME . ((KEY . INFO) ...))
128 where LANGUAGE-NAME is a string, the name of the language environment,
129 KEY is a symbol denoting the kind of information, and
130 INFO is the data associated with KEY.
131 Meaningful values for KEY include
133 documentation value is documentation of what this language environment
134 is meant for, and how to use it.
135 charset value is a list of the character sets used by this
136 language environment.
137 sample-text value is one line of text,
138 written using those character sets,
139 appropriate for this language environment.
140 setup-function value is a function to call to switch to this
141 language environment.
142 exit-function value is a function to call to leave this
143 language environment.
144 coding-system value is a list of coding systems that are good
145 for saving text written in this language environment.
146 This list serves as suggestions to the user;
147 in effect, as a kind of documentation.
148 coding-priority value is a list of coding systems for this language
149 environment, in order of decreasing priority.
150 This is used to set up the coding system priority
151 list when you switch to this language environment.
152 input-method value is a default input method for this language
154 features value is a list of features requested in this
155 language environment.
156 tutorial value is a tutorial file name written in the language.")
158 (defun get-language-info (lang-env key)
159 "Return information listed under KEY for language environment LANG-ENV.
160 KEY is a symbol denoting the kind of information.
161 For a list of useful values for KEY and their meanings,
162 see `language-info-alist'."
163 (if (symbolp lang-env)
164 (setq lang-env (symbol-name lang-env)))
165 (let ((lang-slot (assoc-ignore-case lang-env language-info-alist)))
167 (cdr (assq key (cdr lang-slot))))))
169 (defun set-language-info (lang-env key info)
170 "Modify part of the definition of language environment LANG-ENV.
171 Specifically, this stores the information INFO under KEY
172 in the definition of this language environment.
173 KEY is a symbol denoting the kind of information.
174 INFO is the value for that information.
176 For a list of useful values for KEY and their meanings,
177 see `language-info-alist'."
178 (if (symbolp lang-env)
179 (setq lang-env (symbol-name lang-env)))
180 (let (lang-slot key-slot)
181 (setq lang-slot (assoc lang-env language-info-alist))
182 (if (null lang-slot) ; If no slot for the language, add it.
183 (setq lang-slot (list lang-env)
184 language-info-alist (cons lang-slot language-info-alist)))
185 (setq key-slot (assq key lang-slot))
186 (if (null key-slot) ; If no slot for the key, add it.
188 (setq key-slot (list key))
189 (setcdr lang-slot (cons key-slot (cdr lang-slot)))))
190 (setcdr key-slot info)))
192 (defun set-language-info-alist (lang-env alist &optional parents)
193 "Store ALIST as the definition of language environment LANG-ENV.
194 ALIST is an alist of KEY and INFO values. See the documentation of
195 `set-language-info' for the meanings of KEY and INFO."
196 (if (symbolp lang-env)
197 (setq lang-env (symbol-name lang-env)))
198 (let (; (describe-map describe-language-environment-map)
199 ; (setup-map setup-language-environment-map)
203 ;; map parent-symbol parent)
205 ;; (if (symbolp (setq parent-symbol (car l)))
206 ;; (setq parent (symbol-name parent))
207 ;; (setq parent parent-symbol parent-symbol (intern parent)))
208 ;; (setq map (lookup-key describe-map (vector parent-symbol)))
211 ;; (setq map (intern (format "describe-%s-environment-map"
212 ;; (downcase parent))))
213 ;; (define-prefix-command map)
214 ;; (define-key-after describe-map (vector parent-symbol)
215 ;; (cons parent map) t)))
216 ;; (setq describe-map (symbol-value map))
217 ;; (setq map (lookup-key setup-map (vector parent-symbol)))
220 ;; (setq map (intern (format "setup-%s-environment-map"
221 ;; (downcase parent))))
222 ;; (define-prefix-command map)
223 ;; (define-key-after setup-map (vector parent-symbol)
224 ;; (cons parent map) t)))
225 ;; (setq setup-map (symbol-value map))
226 ;; (setq l (cdr l)))))
228 ;; Set up menu items for this language env.
229 (let ((doc (assq 'documentation alist)))
231 ;; (define-key-after describe-map (vector (intern lang-env))
232 ;; (cons lang-env 'describe-specified-language-support) t)
233 (when (featurep 'menubar)
237 '("%_Edit" "%_Multilingual (\"Mule\")"
238 "%_Describe Language Support")
240 '(describe-language-environment ,lang-env)
243 ;; (define-key-after setup-map (vector (intern lang-env))
244 ;; (cons lang-env 'setup-specified-language-environment) t)
245 (when (featurep 'menubar)
249 '("%_Edit" "%_Multilingual (\"Mule\")"
250 "%_Set Language Environment")
252 '(set-language-environment ,lang-env)
256 (set-language-info lang-env (car (car alist)) (cdr (car alist)))
257 (setq alist (cdr alist)))))
259 (defun read-language-name (key prompt &optional default)
260 "Read a language environment name which has information for KEY.
261 If KEY is nil, read any language environment.
262 Prompt with PROMPT. DEFAULT is the default choice of language environment.
263 This returns a language environment name as a string."
264 (let* ((completion-ignore-case t)
265 (name (completing-read prompt
268 (function (lambda (elm) (assq key elm))))
270 (if (and (> (length name) 0)
272 (get-language-info name key)))
275 ;;; Multilingual input methods.
277 (defconst leim-list-file-name "leim-list.el"
278 "Name of LEIM list file.
279 This file contains a list of libraries of Emacs input methods (LEIM)
280 in the format of Lisp expression for registering each input method.
281 Emacs loads this file at startup time.")
283 (defvar leim-list-header (format
284 ";;; %s -- list of LEIM (Library of Emacs Input Method)
286 ;; This file contains a list of LEIM (Library of Emacs Input Method)
287 ;; in the same directory as this file. Loading this file registers
288 ;; the whole input methods in Emacs.
290 ;; Each entry has the form:
291 ;; (register-input-method
292 ;; INPUT-METHOD LANGUAGE-NAME ACTIVATE-FUNC
295 ;; See the function `register-input-method' for the meanings of arguments.
297 ;; If this directory is included in load-path, Emacs automatically
298 ;; loads this file at startup time.
302 "Header to be inserted in LEIM list file.")
304 (defvar leim-list-entry-regexp "^(register-input-method"
305 "Regexp matching head of each entry in LEIM list file.
306 See also the variable `leim-list-header'")
308 (defvar update-leim-list-functions
309 '(quail-update-leim-list-file)
310 "List of functions to call to update LEIM list file.
311 Each function is called with one arg, LEIM directory name.")
313 (defun update-leim-list-file (&rest dirs)
314 "Update LEIM list file in directories DIRS."
315 (let ((functions update-leim-list-functions))
317 (apply (car functions) dirs)
318 (setq functions (cdr functions)))))
320 (defvar current-input-method nil
321 "The current input method for multilingual text.
322 If nil, that means no input method is activated now.")
323 (make-variable-buffer-local 'current-input-method)
324 (put 'current-input-method 'permanent-local t)
326 (defvar current-input-method-title nil
327 "Title string of the current input method shown in mode line.")
328 (make-variable-buffer-local 'current-input-method-title)
329 (put 'current-input-method-title 'permanent-local t)
331 (defcustom default-input-method nil
332 "*Default input method for multilingual text (a string).
333 This is the input method activated automatically by the command
334 `toggle-input-method' (\\[toggle-input-method])."
336 :type '(choice (const nil) string))
338 (put 'input-method-function 'permanent-local t)
340 (defvar input-method-history nil
341 "History list for some commands that read input methods.")
342 (make-variable-buffer-local 'input-method-history)
343 (put 'input-method-history 'permanent-local t)
345 (defvar inactivate-current-input-method-function nil
346 "Function to call for inactivating the current input method.
347 Every input method should set this to an appropriate value when activated.
348 This function is called with no argument.
350 This function should never change the value of `current-input-method'.
351 It is set to nil by the function `inactivate-input-method'.")
352 (make-variable-buffer-local 'inactivate-current-input-method-function)
353 (put 'inactivate-current-input-method-function 'permanent-local t)
355 (defvar describe-current-input-method-function nil
356 "Function to call for describing the current input method.
357 This function is called with no argument.")
358 (make-variable-buffer-local 'describe-current-input-method-function)
359 (put 'describe-current-input-method-function 'permanent-local t)
361 (defvar input-method-alist nil
362 "Alist of input method names vs how to use them.
363 Each element has the form:
364 (INPUT-METHOD LANGUAGE-ENV ACTIVATE-FUNC TITLE DESCRIPTION ARGS...)
365 See the function `register-input-method' for the meanings of the elements.")
367 (defun register-input-method (input-method lang-env &rest args)
368 "Register INPUT-METHOD as an input method for language environment ENV.
369 INPUT-METHOD and LANG-ENV are symbols or strings.
371 The remaining arguments are:
372 ACTIVATE-FUNC, TITLE, DESCRIPTION, and ARGS...
373 ACTIVATE-FUNC is a function to call to activate this method.
374 TITLE is a string to show in the mode line when this method is active.
375 DESCRIPTION is a string describing this method and what it is good for.
376 The ARGS, if any, are passed as arguments to ACTIVATE-FUNC.
377 All told, the arguments to ACTIVATE-FUNC are INPUT-METHOD and the ARGS.
379 This function is mainly used in the file \"leim-list.el\" which is
380 created at building time of emacs, registering all quail input methods
381 contained in the emacs distribution.
383 In case you want to register a new quail input method by yourself, be
384 careful to use the same input method title as given in the third
385 parameter of `quail-define-package' (if the values are different, the
386 string specified in this function takes precedence).
388 The commands `describe-input-method' and `list-input-methods' need
389 this duplicated values to show some information about input methods
390 without loading the affected quail packages."
391 (if (symbolp lang-env)
392 (setq lang-env (symbol-name lang-env)))
393 (if (symbolp input-method)
394 (setq input-method (symbol-name input-method)))
395 (let ((info (cons lang-env args))
396 (slot (assoc input-method input-method-alist)))
399 (setq slot (cons input-method info))
400 (setq input-method-alist (cons slot input-method-alist)))))
402 (defun read-input-method-name (prompt &optional default inhibit-null)
403 "Read a name of input method from a minibuffer prompting with PROMPT.
404 If DEFAULT is non-nil, use that as the default,
405 and substitute it into PROMPT at the first `%s'.
406 If INHIBIT-NULL is non-nil, null input signals an error.
408 The return value is a string."
410 (setq prompt (format prompt default)))
411 (let* ((completion-ignore-case t)
412 ;; This binding is necessary because input-method-history is
414 (input-method (completing-read prompt input-method-alist
415 nil t nil 'input-method-history
417 (if (and input-method (symbolp input-method))
418 (setq input-method (symbol-name input-method)))
419 (if (> (length input-method) 0)
422 (error "No valid input method is specified")))))
424 (defun activate-input-method (input-method)
425 "Switch to input method INPUT-METHOD for the current buffer.
426 If some other input method is already active, turn it off first.
427 If INPUT-METHOD is nil, deactivate any current input method."
428 (if (and input-method (symbolp input-method))
429 (setq input-method (symbol-name input-method)))
430 (if (and current-input-method
431 (not (string= current-input-method input-method)))
432 (inactivate-input-method))
433 (unless (or current-input-method (null input-method))
434 (let ((slot (assoc input-method input-method-alist)))
436 (error "Can't activate input method `%s'" input-method))
437 (let ((func (nth 2 slot)))
439 (apply (nth 2 slot) input-method (nthcdr 5 slot))
440 (if (and (consp func) (symbolp (car func)) (symbolp (cdr func)))
443 (apply (car func) input-method (nthcdr 5 slot)))
444 (error "Can't activate input method `%s'" input-method))))
445 (setq current-input-method input-method)
446 (setq current-input-method-title (nth 3 slot))
448 (run-hooks 'input-method-activate-hook)
449 (force-mode-line-update)))))
451 (defun inactivate-input-method ()
452 "Turn off the current input method."
453 (when current-input-method
454 (if input-method-history
455 (unless (string= current-input-method (car input-method-history))
456 (setq input-method-history
457 (cons current-input-method
458 (delete current-input-method input-method-history))))
459 (setq input-method-history (list current-input-method)))
461 (funcall inactivate-current-input-method-function)
463 (run-hooks 'input-method-inactivate-hook)
464 (setq current-input-method nil
465 current-input-method-title nil)
466 (force-mode-line-update)))))
468 (defun set-input-method (input-method)
469 "Select and activate input method INPUT-METHOD for the current buffer.
470 This also sets the default input method to the one you specify."
472 (let* ((default (or (car input-method-history) default-input-method)))
473 (list (read-input-method-name
474 (if default "Select input method (default %s): " "Select input method: ")
476 (activate-input-method input-method)
477 (setq default-input-method input-method))
479 (defun toggle-input-method (&optional arg)
480 "Turn on or off a multilingual text input method for the current buffer.
482 With no prefix argument, if an input method is currently activated,
483 turn it off. Otherwise, activate an input method -- the one most
484 recently used, or the one specified in `default-input-method', or
485 the one read from the minibuffer.
487 With a prefix argument, read an input method from the minibuffer and
490 The default is to use the most recent input method specified
491 \(not including the currently active input method, if any)."
493 (if (and current-input-method (not arg))
494 (inactivate-input-method)
495 (let ((default (or (car input-method-history) default-input-method)))
496 (if (and arg default (equal current-input-method default)
497 (> (length input-method-history) 1))
498 (setq default (nth 1 input-method-history)))
499 (activate-input-method
500 (if (or arg (not default))
502 (read-input-method-name
503 (if default "Input method (default %s): " "Input method: " )
506 (or default-input-method
507 (setq default-input-method current-input-method)))))
509 (defun describe-input-method (input-method)
510 "Describe input method INPUT-METHOD."
512 (list (read-input-method-name
513 "Describe input method (default, current choice): ")))
514 (if (and input-method (symbolp input-method))
515 (setq input-method (symbol-name input-method)))
516 (if (null input-method)
517 (describe-current-input-method)
518 (with-output-to-temp-buffer "*Help*"
519 (let ((elt (assoc input-method input-method-alist)))
520 (princ (format "Input method: %s (`%s' in mode line) for %s\n %s\n"
521 input-method (nth 3 elt) (nth 1 elt) (nth 4 elt)))))))
523 (defun describe-current-input-method ()
524 "Describe the input method currently in use."
525 (if current-input-method
526 (if (and (symbolp describe-current-input-method-function)
527 (fboundp describe-current-input-method-function))
528 (funcall describe-current-input-method-function)
529 (message "No way to describe the current input method `%s'"
530 current-input-method)
532 (error "No input method is activated now")))
534 (defun read-multilingual-string (prompt &optional initial-input input-method)
535 "Read a multilingual string from minibuffer, prompting with string PROMPT.
536 The input method selected last time is activated in minibuffer.
537 If optional second arg INITIAL-INPUT is non-nil, insert it in the minibuffer
539 Optional 3rd argument INPUT-METHOD specifies the input method
540 to be activated instead of the one selected last time. It is a symbol
546 (read-input-method-name "Input method: " nil t)))
547 (if (and input-method (symbolp input-method))
548 (setq input-method (symbol-name input-method)))
549 (let ((prev-input-method current-input-method))
552 (activate-input-method input-method)
554 ;; (read-string prompt initial-input nil nil t)
555 (read-string prompt initial-input nil))
556 (activate-input-method prev-input-method))))
558 ;; Variables to control behavior of input methods. All input methods
559 ;; should react to these variables.
561 (defcustom input-method-verbose-flag 'default
562 "*A flag to control extra guidance given by input methods.
563 The value should be nil, t, `complex-only', or `default'.
565 The extra guidance is done by showing list of available keys in echo
566 area. When you use the input method in the minibuffer, the guidance
567 is shown at the bottom short window (split from the existing window).
569 If the value is t, extra guidance is always given, if the value is
570 nil, extra guidance is always suppressed.
572 If the value is `complex-only', only complex input methods such as
573 `chinese-py' and `japanese' give extra guidance.
575 If the value is `default', complex input methods always give extra
576 guidance, but simple input methods give it only when you are not in
579 See also the variable `input-method-highlight-flag'."
580 :type '(choice (const t) (const nil) (const complex-only) (const default))
583 (defcustom input-method-highlight-flag t
584 "*If this flag is non-nil, input methods highlight partially-entered text.
585 For instance, while you are in the middle of a Quail input method sequence,
586 the text inserted so far is temporarily underlined.
587 The underlining goes away when you finish or abort the input method sequence.
588 See also the variable `input-method-verbose-flag'."
592 (defvar input-method-activate-hook nil
593 "Normal hook run just after an input method is activated.
595 The variable `current-input-method' keeps the input method name
598 (defvar input-method-inactivate-hook nil
599 "Normal hook run just after an input method is inactivated.
601 The variable `current-input-method' still keeps the input method name
604 (defvar input-method-after-insert-chunk-hook nil
605 "Normal hook run just after an input method insert some chunk of text.")
607 (defvar input-method-exit-on-first-char nil
608 "This flag controls a timing when an input method returns.
609 Usually, the input method does not return while there's a possibility
610 that it may find a different translation if a user types another key.
611 But, it this flag is non-nil, the input method returns as soon as
612 the current key sequence gets long enough to have some valid translation.")
614 (defvar input-method-use-echo-area nil
615 "This flag controls how an input method shows an intermediate key sequence.
616 Usually, the input method inserts the intermediate key sequence,
617 or candidate translations corresponding to the sequence,
618 at point in the current buffer.
619 But, if this flag is non-nil, it displays them in echo area instead.")
621 (defvar input-method-exit-on-invalid-key nil
622 "This flag controls the behavior of an input method on invalid key input.
623 Usually, when a user types a key which doesn't start any character
624 handled by the input method, the key is handled by turning off the
625 input method temporarily. After that key, the input method is re-enabled.
626 But, if this flag is non-nil, the input method is never back on.")
629 (defvar set-language-environment-hook nil
630 "Normal hook run after some language environment is set.
632 When you set some hook function here, that effect usually should not
633 be inherited to another language environment. So, you had better set
634 another function in `exit-language-environment-hook' (which see) to
637 (defvar exit-language-environment-hook nil
638 "Normal hook run after exiting from some language environment.
639 When this hook is run, the variable `current-language-environment'
640 is still bound to the language environment being exited.
642 This hook is mainly used for canceling the effect of
643 `set-language-environment-hook' (which-see).")
645 (put 'setup-specified-language-environment 'apropos-inhibit t)
647 (defun setup-specified-language-environment ()
648 "Switch to a specified language environment."
651 (if (and (symbolp last-command-event)
652 (or (not (eq last-command-event 'Default))
653 (setq last-command-event 'English))
654 (setq language-name (symbol-name last-command-event)))
655 (set-language-environment language-name)
656 (error "Bogus calling sequence"))))
658 (defcustom current-language-environment "English"
659 "The last language environment specified with `set-language-environment'.
660 This variable should be set only with \\[customize], which is equivalent
661 to using the function `set-language-environment'."
662 :link '(custom-manual "(emacs)Language Environments")
663 :set (lambda (symbol value) (set-language-environment value))
665 (or (car-safe (assoc-ignore-case
666 (if (symbolp current-language-environment)
667 (symbol-name current-language-environment)
668 current-language-environment)
669 language-info-alist))
671 :type (cons 'choice (mapcar (lambda (lang)
672 (list 'const (car lang)))
673 language-info-alist))
674 :initialize 'custom-initialize-default
678 (defun reset-language-environment ()
679 "Reset multilingual environment of Emacs to the default status.
681 The default status is as follows:
683 The default value of `buffer-file-coding-system' is nil.
684 The default coding system for process I/O is nil.
685 The default value for the command `set-terminal-coding-system' is nil.
686 The default value for the command `set-keyboard-coding-system' is nil.
688 The order of priorities of coding categories and the coding system
689 bound to each category are as follows
690 coding category coding system
691 --------------------------------------------------
693 no-conversion raw-text
696 iso-8-2 ctext (iso-8859-1 alias)
697 iso-8-designate ctext (iso-8859-1 alias)
698 iso-lock-shift iso-2022-lock
701 ucs-4 iso-10646-ucs-4
703 ;; The old table (from FSF synch?) was not what we use (cf mule-coding.el),
704 ;; and as documented iso-8-designate is inconsistent with iso-2022-8bit-ss2.
705 ;; The order of priorities of coding categories and the coding system
706 ;; bound to each category are as follows
707 ;; coding category coding system
708 ;; --------------------------------------------------
709 ;; iso-8-2 iso-8859-1
710 ;; iso-8-1 iso-8859-1
711 ;; iso-7 iso-2022-7bit
712 ;; iso-lock-shift iso-2022-lock
713 ;; iso-8-designate iso-2022-8bit-ss2
714 ;; no-conversion raw-text
715 ;; shift-jis shift_jis
721 (set-coding-category-system 'iso-7 'iso-2022-7)
722 (set-coding-category-system 'iso-8-1 'iso-8859-1)
723 (set-coding-category-system 'iso-8-2 'ctext)
724 (set-coding-category-system 'iso-lock-shift 'iso-2022-lock)
725 (set-coding-category-system 'iso-8-designate 'ctext)
726 (set-coding-category-system 'no-conversion 'raw-text)
727 (set-coding-category-system 'shift-jis 'shift_jis)
728 (set-coding-category-system 'big5 'big5)
729 ;; #### Can we now assume the existence of the 10646 coding systems?
730 ;; #### These lists need to be synched with the ones in mule-coding.el.
731 (cond ((eq (coding-system-type (coding-category-system 'utf-8)) 'utf-8)
732 (set-coding-category-system 'utf-8 'utf-8)
733 (cond ((eq (coding-system-type (coding-category-system 'ucs-4))
735 (set-coding-category-system 'ucs-4 'iso-10646-ucs-4)
736 (set-coding-priority-list
749 (set-coding-priority-list
762 (set-coding-priority-list
773 ;; (update-coding-systems-internal)
775 (set-default-coding-systems nil)
776 ;; Don't alter the terminal and keyboard coding systems here.
777 ;; The terminal still supports the same coding system
778 ;; that it supported a minute ago.
779 ;;; (set-terminal-coding-system-internal nil)
780 ;;; (set-keyboard-coding-system-internal nil)
782 ;; (setq nonascii-translation-table nil
783 ;; nonascii-insert-offset 0)
786 (defun set-language-environment (language-name)
787 "Set up multi-lingual environment for using LANGUAGE-NAME.
788 This sets the coding system priority and the default input method
789 and sometimes other things. LANGUAGE-NAME should be a string
790 which is the name of a language environment. For example, \"Latin-1\"
791 specifies the character set for the major languages of Western Europe."
792 (interactive (list (read-language-name
794 "Set language environment (default, English): ")))
796 (if (symbolp language-name)
797 (setq language-name (symbol-name language-name)))
798 (setq language-name "English"))
799 (or (assoc-ignore-case language-name language-info-alist)
800 (error "Language environment not defined: %S" language-name))
801 (if current-language-environment
802 (let ((func (get-language-info current-language-environment
804 (run-hooks 'exit-language-environment-hook)
805 (if (fboundp func) (funcall func))))
806 (let ((default-eol-type (coding-system-eol-type
807 default-buffer-file-coding-system)))
808 (reset-language-environment)
810 (setq current-language-environment language-name)
811 (set-language-environment-coding-systems language-name default-eol-type))
812 (let ((input-method (get-language-info language-name 'input-method)))
814 (setq default-input-method input-method)
815 (if input-method-history
816 (setq input-method-history
818 (delete input-method input-method-history))))))
819 ;; (let ((nonascii (get-language-info language-name 'nonascii-translation))
821 ;; (if (eq window-system 'pc)
823 ;; (concat "cp" dos-codepage "-nonascii-translation-table")))))
825 ;; ((char-table-p nonascii)
826 ;; (setq nonascii-translation-table nonascii))
827 ;; ((and (eq window-system 'pc) (boundp dos-table))
828 ;; ;; DOS terminals' default is to use a special non-ASCII translation
829 ;; ;; table as appropriate for the installed codepage.
830 ;; (setq nonascii-translation-table (symbol-value dos-table)))
831 ;; ((charsetp nonascii)
832 ;; (setq nonascii-insert-offset (- (make-char nonascii) 128)))))
834 ;; (setq charset-origin-alist
835 ;; (get-language-info language-name 'charset-origin-alist))
837 ;; Unibyte setups if necessary.
838 ;; (unless default-enable-multibyte-characters
839 ;; ;; Syntax and case table.
840 ;; (let ((syntax (get-language-info language-name 'unibyte-syntax)))
842 ;; (let ((set-case-syntax-set-multibyte nil))
843 ;; (load syntax nil t))
844 ;; ;; No information for syntax and case. Reset to the defaults.
845 ;; (let ((syntax-table (standard-syntax-table))
846 ;; (case-table (standard-case-table))
847 ;; (ch (if (eq window-system 'pc) 128 160)))
849 ;; (modify-syntax-entry ch " " syntax-table)
850 ;; (aset case-table ch ch)
851 ;; (setq ch (1+ ch)))
852 ;; (set-char-table-extra-slot case-table 0 nil)
853 ;; (set-char-table-extra-slot case-table 1 nil)
854 ;; (set-char-table-extra-slot case-table 2 nil))
855 ;; (set-standard-case-table (standard-case-table))
856 ;; (let ((list (buffer-list)))
858 ;; (with-current-buffer (car list)
859 ;; (set-case-table (standard-case-table)))
860 ;; (setq list (cdr list))))))
861 ;; ;; Display table and coding system for terminal.
862 ;; (let ((coding (get-language-info language-name 'unibyte-display)))
864 ;; (standard-display-european-internal)
865 ;; (standard-display-default (if (eq window-system 'pc) 128 160) 255)
866 ;; (aset standard-display-table 146 nil))
867 ;; (or (eq window-system 'pc)
868 ;; (set-terminal-coding-system coding))))
870 (let ((required-features (get-language-info language-name 'features)))
871 (while required-features
872 (require (car required-features))
873 (setq required-features (cdr required-features))))
874 (let ((func (get-language-info language-name 'setup-function)))
877 (run-hooks 'set-language-environment-hook)
878 (force-mode-line-update t))
880 ;; (defun standard-display-european-internal ()
881 ;; ;; Actually set up direct output of non-ASCII characters.
882 ;; (standard-display-8bit (if (eq window-system 'pc) 128 160) 255)
883 ;; ;; Unibyte Emacs on MS-DOS wants to display all 8-bit characters with
884 ;; ;; the native font, and codes 160 and 146 stand for something very
885 ;; ;; different there.
886 ;; (or (and (eq window-system 'pc) (not default-enable-multibyte-characters))
888 ;; ;; Make non-line-break space display as a plain space.
889 ;; ;; Most X fonts do the wrong thing for code 160.
890 ;; (aset standard-display-table 160 [32])
891 ;; ;; Most Windows programs send out apostrophe's as \222. Most X fonts
892 ;; ;; don't contain a character at that position. Map it to the ASCII
894 ;; (aset standard-display-table 146 [39]))))
896 (defun set-language-environment-coding-systems (language-name
898 "Do various coding system setups for language environment LANGUAGE-NAME.
900 The optional arg EOL-TYPE specifies the eol-type of the default value
901 of buffer-file-coding-system set by this function.
903 Note that `coding-priority-list' is not reset first; thus changing language
904 environment allows recognition of coding systems from previously set language
905 environments. (This will not work if the desired coding systems are from the
906 same category. E.g., starting with a Hebrew language environment, ISO 8859-8
907 will be recognized. If you shift to Russian, ISO 8859-8 will be shadowed by
908 ISO 8859-5, and cannot be automatically recognized without resetting the
909 language environment to Hebrew. However, if you shift from Japanese to
910 Russian, ISO-2022-JP will continue to be automatically recognized, since
911 ISO-8859-5 and ISO-2022-JP are different coding categories.)"
912 (let* ((priority (get-language-info language-name 'coding-priority))
913 (default-coding (car priority)))
915 (let ((categories (mapcar 'coding-system-category priority))
916 category checked-categories)
917 (set-default-coding-systems
918 (if (memq eol-type '(lf crlf cr unix dos mac))
919 (coding-system-change-eol-conversion default-coding eol-type)
921 ;; (setq default-sendmail-coding-system default-coding)
923 (unless (memq (setq category (car categories)) checked-categories)
924 (set-coding-category-system category (car priority))
925 (setq checked-categories (cons category checked-categories)))
926 (setq priority (cdr priority)
927 categories (cdr categories)))
928 (set-coding-priority-list (nreverse checked-categories))
929 ;; (update-coding-systems-internal)
932 ;; Print all arguments with `princ', then print "\n".
933 (defsubst princ-list (&rest args)
934 (while args (princ (car args)) (setq args (cdr args)))
937 (put 'describe-specified-language-support 'apropos-inhibit t)
939 ;; Print a language specific information such as input methods,
940 ;; charsets, and coding systems. This function is intended to be
941 ;; called from the menu:
942 ;; [menu-bar mule describe-language-environment LANGUAGE]
943 ;; and should not run it by `M-x describe-current-input-method-function'.
944 (defun describe-specified-language-support ()
945 "Describe how Emacs supports the specified language environment."
948 (if (not (and (symbolp last-command-event)
949 (setq language-name (symbol-name last-command-event))))
950 (error "Bogus calling sequence"))
951 (describe-language-environment language-name)))
953 (defun describe-language-environment (language-name)
954 "Describe how Emacs supports language environment LANGUAGE-NAME."
956 (list (read-language-name
958 "Describe language environment (default, current choice): ")))
959 (if (null language-name)
960 (setq language-name current-language-environment))
961 (if (or (null language-name)
962 (null (get-language-info language-name 'documentation)))
963 (error "No documentation for the specified language"))
964 (if (symbolp language-name)
965 (setq language-name (symbol-name language-name)))
966 (let ((doc (get-language-info language-name 'documentation)))
967 (with-output-to-temp-buffer "*Help*"
968 (princ-list language-name " language environment" "\n")
973 (let ((str (get-language-info language-name 'sample-text)))
976 (princ "Sample text:\n")
979 (let ((input-method (get-language-info language-name 'input-method))
980 (l (copy-sequence input-method-alist)))
981 (princ "Input methods")
983 (princ (format " (default, %s)" input-method))
984 (setq input-method (assoc input-method input-method-alist))
985 (setq l (cons input-method (delete input-method l))))
988 (if (string= language-name (nth 1 (car l)))
989 (princ-list " " (car (car l))
990 (format " (`%s' in mode line)" (nth 3 (car l)))))
993 (princ "Character sets:\n")
994 (let ((l (get-language-info language-name 'charset)))
996 (princ-list " nothing specific to " language-name)
998 (princ-list " " (car l) ": "
999 (charset-description (car l)))
1002 (princ "Coding systems:\n")
1003 (let ((l (get-language-info language-name 'coding-system)))
1005 (princ-list " nothing specific to " language-name)
1007 (princ ; (format " %s (`%c' in mode line):\n\t%s\n"
1008 ;; In XEmacs, `coding-system-mnemonic' returns string.
1009 (format " %s (`%s' in mode line):\n\t%s\n"
1011 (coding-system-mnemonic (car l))
1012 (coding-system-doc-string (car l))))
1013 ;; (let ((aliases (coding-system-get (car l) 'alias-coding-systems)))
1016 ;; (princ (cons 'alias: (cdr aliases)))
1018 (setq l (cdr l))))))))
1020 ;;; Charset property
1022 ;; (defsubst get-charset-property (charset propname)
1023 ;; "Return the value of CHARSET's PROPNAME property.
1024 ;; This is the last value stored with
1025 ;; `(put-charset-property CHARSET PROPNAME VALUE)'."
1026 ;; (plist-get (charset-plist charset) propname))
1028 ;; (defsubst put-charset-property (charset propname value)
1029 ;; "Store CHARSETS's PROPNAME property with value VALUE.
1030 ;; It can be retrieved with `(get-charset-property CHARSET PROPNAME)'."
1031 ;; (set-charset-plist charset
1032 ;; (plist-put (charset-plist charset) propname value)))
1034 (defvar char-code-property-table
1035 (make-char-table 'generic)
1036 "Char-table containing a property list of each character code.
1038 See also the documentation of `get-char-code-property' and
1039 `put-char-code-property'")
1040 ;; (let ((plist (aref char-code-property-table char)))
1041 (defun get-char-code-property (char propname)
1042 "Return the value of CHAR's PROPNAME property in `char-code-property-table'."
1043 (let ((plist (get-char-table char char-code-property-table)))
1045 (car (cdr (memq propname plist))))))
1047 (defun put-char-code-property (char propname value)
1048 "Store CHAR's PROPNAME property with VALUE in `char-code-property-table'.
1049 It can be retrieved with `(get-char-code-property CHAR PROPNAME)'."
1050 (let ((plist (get-char-table char char-code-property-table)))
1052 (let ((slot (memq propname plist)))
1054 (setcar (cdr slot) value)
1055 (nconc plist (list propname value))))
1056 (put-char-table char (list propname value) char-code-property-table)
1060 ;; Pretty description of encoded string
1062 ;; Alist of ISO 2022 control code vs the corresponding mnemonic string.
1063 ;; (defvar iso-2022-control-alist
1064 ;; '((?\x1b . "ESC")
1069 ;; (?\x9b . "CSI")))
1071 ;; (defun encoded-string-description (str coding-system)
1072 ;; "Return a pretty description of STR that is encoded by CODING-SYSTEM."
1073 ;; (setq str (string-as-unibyte str))
1074 ;; (let ((char (aref str 0))
1076 ;; (when (< char 128)
1077 ;; (setq desc (or (cdr (assq char iso-2022-control-alist))
1078 ;; (char-to-string char)))
1080 ;; (len (length str)))
1082 ;; (setq char (aref str i))
1083 ;; (if (>= char 128)
1084 ;; (setq desc nil i len)
1085 ;; (setq desc (concat desc " "
1086 ;; (or (cdr (assq char iso-2022-control-alist))
1087 ;; (char-to-string char)))
1090 ;; (mapconcat (function (lambda (x) (format "0x%02x" x))) str " "))))
1092 ;; (defun encode-coding-char (char coding-system)
1093 ;; "Encode CHAR by CODING-SYSTEM and return the resulting string.
1094 ;; If CODING-SYSTEM can't safely encode CHAR, return nil."
1095 ;; (if (cmpcharp char)
1096 ;; (setq char (car (decompose-composite-char char 'list))))
1097 ;; (let ((str1 (char-to-string char))
1098 ;; (str2 (make-string 2 char))
1099 ;; (safe-charsets (and coding-system
1100 ;; (coding-system-get coding-system 'safe-charsets)))
1102 ;; (when (or (eq safe-charsets t)
1103 ;; (memq (char-charset char) safe-charsets))
1104 ;; ;; We must find the encoded string of CHAR. But, just encoding
1105 ;; ;; CHAR will put extra control sequences (usually to designate
1106 ;; ;; ASCII charset) at the tail if type of CODING is ISO 2022.
1107 ;; ;; To exclude such tailing bytes, we at first encode one-char
1108 ;; ;; string and two-char string, then check how many bytes at the
1109 ;; ;; tail of both encoded strings are the same.
1111 ;; (setq enc1 (string-as-unibyte (encode-coding-string str1 coding-system))
1113 ;; enc2 (string-as-unibyte (encode-coding-string str2 coding-system))
1114 ;; i2 (length enc2))
1115 ;; (while (and (> i1 0) (= (aref enc1 (1- i1)) (aref enc2 (1- i2))))
1116 ;; (setq i1 (1- i1) i2 (1- i2)))
1118 ;; ;; Now (substring enc1 i1) and (substring enc2 i2) are the same,
1119 ;; ;; and they are the extra control sequences at the tail to
1121 ;; (substring enc2 0 i2))))
1124 ;;; mule-cmds.el ends here