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1 | ;;; mule.el --- basic commands for mulitilingual environment |
2 | ||
4ed46869 KH |
3 | ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN. |
4 | ||
5 | ;; Keywords: mule, multilingual, character set, coding system | |
6 | ||
7 | ;; This file is part of GNU Emacs. | |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
11 | ;; the Free Software Foundation; either version 2, or (at your option) | |
12 | ;; any later version. | |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
369314dc KH |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
21 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | ;; Boston, MA 02111-1307, USA. | |
4ed46869 KH |
23 | |
24 | ;;; Code: | |
25 | ||
26 | (defconst mule-version "3.0 (MOMIJINOGA)" "\ | |
27 | Version number and name of this version of MULE (multilingual environment).") | |
28 | ||
29 | (defconst mule-version-date "1998.1.1" "\ | |
30 | Distribution date of this version of MULE (multilingual environment).") | |
31 | ||
32 | (defun load-with-code-conversion (fullname file &optional noerror nomessage) | |
33 | "Execute a file of Lisp code named FILE whose absolute path is FULLNAME. | |
34 | The FILE is decoded before evaluation if necessary. | |
35 | If optional second arg NOERROR is non-nil, | |
36 | report no error if FILE doesn't exist. | |
37 | Print messages at start and end of loading unless | |
38 | optional third arg NOMESSAGE is non-nil. | |
39 | Return t if file exists." | |
40 | (if (null (file-readable-p fullname)) | |
41 | (and (null noerror) | |
42 | (signal 'file-error (list "Cannot open load file" file))) | |
43 | ;; Read file with code conversion, and then eval. | |
44 | (let* ((buffer | |
45 | ;; To avoid any autoloading, set default-major-mode to | |
46 | ;; fundamental-mode. | |
47 | (let ((default-major-mode 'fundamental-mode)) | |
48 | ;; We can't use `generate-new-buffer' because files.el | |
49 | ;; is not yet loaded. | |
50 | (get-buffer-create (generate-new-buffer-name " *load*")))) | |
51 | (load-in-progress t)) | |
52 | (or nomessage (message "Loading %s..." file)) | |
53 | (unwind-protect | |
54 | (progn | |
55 | (save-excursion | |
56 | (set-buffer buffer) | |
57 | (insert-file-contents fullname) | |
58 | ;; We must set `buffer-file-name' for `eval-buffer' and | |
59 | ;; `load-history'. | |
60 | (setq buffer-file-name file) | |
61 | ;; Make `kill-buffer' quiet. | |
62 | (set-buffer-modified-p nil)) | |
63 | ;; Eval in the original buffer. | |
64 | (eval-buffer buffer)) | |
65 | (kill-buffer buffer)) | |
66 | (let ((hook (assoc file after-load-alist))) | |
67 | (if hook | |
68 | (mapcar (function eval) (cdr hook)))) | |
69 | (or nomessage noninteractive | |
70 | (message "Loading %s...done" file)) | |
71 | t))) | |
72 | ||
73 | ;; API (Application Program Interface) for charsets. | |
74 | ||
75 | ;; Return t if OBJ is a quoted symbol. | |
76 | (defsubst quoted-symbol-p (obj) | |
77 | (and (listp obj) (eq (car obj) 'quote))) | |
78 | ||
79 | (defsubst charsetp (object) | |
80 | "T is OBJECT is a charset." | |
81 | (and (symbolp object) (vectorp (get object 'charset)))) | |
82 | ||
83 | (defsubst charset-info (charset) | |
84 | "Return a vector of information of CHARSET. | |
85 | The elements of the vector are: | |
86 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, | |
87 | LEADING-CODE-BASE, LEADING-CODE-EXT, | |
88 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, | |
89 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, | |
90 | PLIST, | |
91 | where | |
92 | CHARSET-ID (integer) is the identification number of the charset. | |
93 | DIMENSION (integer) is the number of bytes to represent a character of | |
94 | the charset: 1 or 2. | |
95 | CHARS (integer) is the number of characters in a dimension: 94 or 96. | |
96 | BYTE (integer) is the length of multi-byte form of a character in | |
97 | the charset: one of 1, 2, 3, and 4. | |
98 | WIDTH (integer) is the number of columns a character in the charset | |
99 | occupies on the screen: one of 0, 1, and 2. | |
100 | DIRECTION (integer) is the rendering direction of characters in the | |
101 | charset when rendering. If 0, render from right to left, else | |
102 | render from left to right. | |
103 | LEADING-CODE-BASE (integer) is the base leading-code for the | |
104 | charset. | |
105 | LEADING-CODE-EXT (integer) is the extended leading-code for the | |
106 | charset. All charsets of less than 0xA0 has the value 0. | |
107 | ISO-FINAL-CHAR (character) is the final character of the | |
108 | corresponding ISO 2022 charset. | |
109 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked | |
110 | while encoding to variants of ISO 2022 coding system, one of the | |
111 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). | |
112 | REVERSE-CHARSET (integer) is the charset which differs only in | |
113 | LEFT-TO-RIGHT value from the charset. If there's no such a | |
114 | charset, the value is -1. | |
115 | SHORT-NAME (string) is the short name to refer to the charset. | |
116 | LONG-NAME (string) is the long name to refer to the charset | |
117 | DESCRIPTION (string) is the description string of the charset. | |
118 | PLIST (property list) may contain any type of information a user | |
119 | want to put and get by functions `put-charset-property' and | |
120 | `get-charset-property' respectively." | |
121 | (get charset 'charset)) | |
122 | ||
123 | (defmacro charset-id (charset) | |
124 | "Return charset identification number of CHARSET." | |
125 | (if (and (listp charset) (eq (car charset) 'quote)) | |
126 | (aref (charset-info (nth 1 charset)) 0) | |
127 | `(aref (charset-info ,charset) 0))) | |
128 | ||
129 | (defmacro charset-bytes (charset) | |
130 | (if (quoted-symbol-p charset) | |
131 | (aref (charset-info (nth 1 charset)) 1) | |
132 | `(aref (charset-info ,charset) 1))) | |
133 | ||
134 | (defmacro charset-dimension (charset) | |
135 | (if (quoted-symbol-p charset) | |
136 | (aref (charset-info (nth 1 charset)) 2) | |
137 | `(aref (charset-info ,charset) 2))) | |
138 | ||
139 | (defmacro charset-chars (charset) | |
140 | (if (quoted-symbol-p charset) | |
141 | (aref (charset-info (nth 1 charset)) 3) | |
142 | `(aref (charset-info ,charset) 3))) | |
143 | ||
144 | (defmacro charset-width (charset) | |
145 | (if (quoted-symbol-p charset) | |
146 | (aref (charset-info (nth 1 charset)) 4) | |
147 | `(aref (charset-info ,charset) 4))) | |
148 | ||
149 | (defmacro charset-direction (charset) | |
150 | (if (quoted-symbol-p charset) | |
151 | (aref (charset-info (nth 1 charset)) 5) | |
152 | `(aref (charset-info ,charset) 5))) | |
153 | ||
154 | (defmacro charset-iso-final-char (charset) | |
155 | (if (quoted-symbol-p charset) | |
156 | (aref (charset-info (nth 1 charset)) 8) | |
157 | `(aref (charset-info ,charset) 8))) | |
158 | ||
159 | (defmacro charset-iso-graphic-plane (charset) | |
160 | (if (quoted-symbol-p charset) | |
161 | (aref (charset-info (nth 1 charset)) 9) | |
162 | `(aref (charset-info ,charset) 9))) | |
163 | ||
164 | (defmacro charset-reverse-charset (charset) | |
165 | (if (quoted-symbol-p charset) | |
166 | (aref (charset-info (nth 1 charset)) 10) | |
167 | `(aref (charset-info ,charset) 10))) | |
168 | ||
169 | (defmacro charset-short-name (charset) | |
170 | (if (quoted-symbol-p charset) | |
171 | (aref (charset-info (nth 1 charset)) 11) | |
172 | `(aref (charset-info ,charset) 11))) | |
173 | ||
174 | (defmacro charset-long-name (charset) | |
175 | (if (quoted-symbol-p charset) | |
176 | (aref (charset-info (nth 1 charset)) 12) | |
177 | `(aref (charset-info ,charset) 12))) | |
178 | ||
179 | (defmacro charset-description (charset) | |
180 | (if (quoted-symbol-p charset) | |
181 | (aref (charset-info (nth 1 charset)) 13) | |
182 | `(aref (charset-info ,charset) 13))) | |
183 | ||
184 | (defmacro charset-plist (charset) | |
185 | (if (quoted-symbol-p charset) | |
f98e2797 | 186 | `(aref ,(charset-info (nth 1 charset)) 14) |
4ed46869 KH |
187 | `(aref (charset-info ,charset) 14))) |
188 | ||
189 | (defun set-charset-plist (charset plist) | |
190 | (aset (charset-info charset) 14 plist)) | |
191 | ||
192 | (defmacro make-char (charset &optional c1 c2) | |
f98e2797 KH |
193 | "Return a character of CHARSET and position-codes CODE1 and CODE2. |
194 | CODE1 and CODE2 are optional, but if you don't supply | |
195 | sufficient position-codes, return a generic character which stands for | |
196 | all characters or group of characters in the character sets. | |
a73a8c89 | 197 | A generic character can be used to index a char table (e.g. syntax-table)." |
4ed46869 KH |
198 | (if (quoted-symbol-p charset) |
199 | `(make-char-internal ,(charset-id (nth 1 charset)) ,c1 ,c2) | |
200 | `(make-char-internal (charset-id ,charset) ,c1 ,c2))) | |
201 | ||
69eba008 KH |
202 | (defmacro charset-list () |
203 | "Return list of charsets ever defined." | |
13d5617d KH |
204 | 'charset-list) |
205 | ||
206 | (defsubst generic-char-p (char) | |
207 | "Return t if and only if CHAR is a generic character. | |
208 | See also the documentation of make-char." | |
209 | (let ((l (split-char char))) | |
210 | (and (or (= (nth 1 l) 0) (eq (nth 2 l) 0)) | |
211 | (not (eq (car l) 'composition))))) | |
69eba008 | 212 | |
8057896b | 213 | ;; Coding system staffs |
4ed46869 | 214 | |
8057896b | 215 | ;; Coding system is a symbol that has the property `coding-system'. |
4ed46869 | 216 | ;; |
8057896b KH |
217 | ;; The value of the property `coding-system' is a vector of the |
218 | ;; following format: | |
219 | ;; [TYPE MNEMONIC DOC-STRING NOT-USED-NOW FLAGS] | |
220 | ;; We call this vector as coding-spec. See comments in src/coding.c | |
221 | ;; for more detail. The property value may be another coding system, | |
222 | ;; in which case, the coding-spec should be taken from that | |
223 | ;; coding-system. The 4th element NOT-USED-NOW is kept just for | |
224 | ;; backward compatibility with old version of Mule. | |
225 | ||
226 | (defconst coding-spec-type-idx 0) | |
227 | (defconst coding-spec-mnemonic-idx 1) | |
228 | (defconst coding-spec-doc-string-idx 2) | |
229 | (defconst coding-spec-flags-idx 4) | |
230 | ||
231 | ;; Coding system may have proerpty `eol-type'. The value of the | |
232 | ;; property `eol-type' is integer 0..2 or a vector of three coding | |
233 | ;; systems. The integer value 0, 1, and 2 indicate the format of | |
4ed46869 KH |
234 | ;; end-of-line LF, CRLF, and CR respectively. The vector value |
235 | ;; indicates that the format of end-of-line should be detected | |
8057896b KH |
236 | ;; automatically. Nth element of the vector is the subsidiary coding |
237 | ;; system whose `eol-type' property is N. | |
4ed46869 | 238 | ;; |
8057896b KH |
239 | ;; Coding system may also have properties `post-read-conversion' and |
240 | ;; `pre-write-conversion. Values of these properties are functions. | |
4ed46869 KH |
241 | ;; |
242 | ;; The function in `post-read-conversion' is called after some text is | |
8057896b | 243 | ;; inserted and decoded along the coding system and before any |
4ed46869 KH |
244 | ;; functions in `after-insert-functions' are called. The arguments to |
245 | ;; this function is the same as those of a function in | |
246 | ;; `after-insert-functions', i.e. LENGTH of a text while putting point | |
247 | ;; at the head of the text to be decoded | |
248 | ;; | |
249 | ;; The function in `pre-write-conversion' is called after all | |
250 | ;; functions in `write-region-annotate-functions' and | |
251 | ;; `buffer-file-format' are called, and before the text is encoded by | |
8057896b | 252 | ;; the coding system. The arguments to this function is the same as |
4ed46869 KH |
253 | ;; those of a function in `write-region-annotate-functions', i.e. FROM |
254 | ;; and TO specifying region of a text. | |
255 | ||
8057896b KH |
256 | ;; Return Nth element of coding-spec of CODING-SYSTEM. |
257 | (defun coding-system-spec-ref (coding-system n) | |
258 | (check-coding-system coding-system) | |
259 | (let ((vec (coding-system-spec coding-system))) | |
260 | (and vec (aref vec n)))) | |
4ed46869 | 261 | |
4ed46869 | 262 | (defun coding-system-type (coding-system) |
6e9722b0 | 263 | "Return TYPE element in coding-spec of CODING-SYSTEM." |
8057896b | 264 | (coding-system-spec-ref coding-system coding-spec-type-idx)) |
4ed46869 | 265 | |
4ed46869 | 266 | (defun coding-system-mnemonic (coding-system) |
8057896b KH |
267 | "Return MNEMONIC element in coding-spec of CODING-SYSTEM." |
268 | (or (coding-system-spec-ref coding-system coding-spec-mnemonic-idx) | |
269 | ?-)) | |
4ed46869 | 270 | |
8057896b KH |
271 | (defun coding-system-doc-string (coding-system) |
272 | "Return DOC-STRING element in coding-spec of CODING-SYSTEM." | |
273 | (coding-system-spec-ref coding-system coding-spec-doc-string-idx)) | |
4ed46869 | 274 | |
4ed46869 | 275 | (defun coding-system-flags (coding-system) |
8057896b KH |
276 | "Return FLAGS element in coding-spec of CODING-SYSTEM." |
277 | (coding-system-spec-ref coding-system coding-spec-flags-idx)) | |
4ed46869 | 278 | |
8057896b KH |
279 | (defun coding-system-eol-type (coding-system) |
280 | "Return eol-type property of CODING-SYSTEM." | |
69eba008 | 281 | (check-coding-system coding-system) |
4ed46869 KH |
282 | (and coding-system |
283 | (or (get coding-system 'eol-type) | |
8057896b | 284 | (coding-system-eol-type (get coding-system 'coding-system))))) |
4ed46869 | 285 | |
6e9722b0 KH |
286 | (defun coding-system-category (coding-system) |
287 | "Return coding category of CODING-SYSTEM." | |
288 | (and coding-system | |
289 | (symbolp coding-system) | |
290 | (or (get coding-system 'coding-category) | |
291 | (coding-system-category (get coding-system 'coding-system))))) | |
292 | ||
bd882697 KH |
293 | (defun coding-system-parent (coding-system) |
294 | "Return parent of CODING-SYSTEM." | |
295 | (let ((parent (get coding-system 'parent-coding-system))) | |
296 | (and parent | |
297 | (or (coding-system-parent parent) | |
298 | parent)))) | |
299 | ||
6e9722b0 KH |
300 | ;; Make subsidiary coding systems (eol-type variants) of CODING-SYSTEM. |
301 | (defun make-subsidiary-coding-system (coding-system) | |
8057896b KH |
302 | (let ((subsidiaries (vector (intern (format "%s-unix" coding-system)) |
303 | (intern (format "%s-dos" coding-system)) | |
304 | (intern (format "%s-mac" coding-system)))) | |
305 | (i 0)) | |
306 | (while (< i 3) | |
6e9722b0 | 307 | (put (aref subsidiaries i) 'coding-system coding-system) |
8057896b KH |
308 | (put (aref subsidiaries i) 'eol-type i) |
309 | (put (aref subsidiaries i) 'eol-variant t) | |
310 | (setq i (1+ i))) | |
311 | subsidiaries)) | |
4ed46869 | 312 | |
8057896b KH |
313 | (defun make-coding-system (coding-system type mnemonic doc-string |
314 | &optional flags) | |
4ed46869 | 315 | "Define a new CODING-SYSTEM (symbol). |
8057896b KH |
316 | Remaining arguments are TYPE, MNEMONIC, DOC-STRING, and FLAGS (optional) which |
317 | construct a coding-spec of CODING-SYSTEM in the following format: | |
318 | [TYPE MNEMONIC DOC-STRING nil FLAGS] | |
4ed46869 KH |
319 | TYPE is an integer value indicating the type of coding-system as follows: |
320 | 0: Emacs internal format, | |
321 | 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PC, | |
322 | 2: ISO-2022 including many variants, | |
323 | 3: Big5 used mainly on Chinese PC, | |
324 | 4: private, CCL programs provide encoding/decoding algorithm. | |
325 | MNEMONIC is a character to be displayed on mode line for the coding-system. | |
8057896b | 326 | DOC-STRING is a documentation string for the coding-system. |
4ed46869 KH |
327 | FLAGS specifies more precise information of each TYPE. |
328 | If TYPE is 2 (ISO-2022), FLAGS should be a list of: | |
329 | CHARSET0, CHARSET1, CHARSET2, CHARSET3, SHORT-FORM, | |
330 | ASCII-EOL, ASCII-CNTL, SEVEN, LOCKING-SHIFT, SINGLE-SHIFT, | |
a73a8c89 | 331 | USE-ROMAN, USE-OLDJIS, NO-ISO6429, INIT-BOL, DESIGNATION-BOL. |
4ed46869 KH |
332 | CHARSETn are character sets initially designated to Gn graphic registers. |
333 | If CHARSETn is nil, Gn is never used. | |
334 | If CHARSETn is t, Gn can be used but nothing designated initially. | |
335 | If CHARSETn is a list of character sets, those character sets are | |
336 | designated to Gn on output, but nothing designated to Gn initially. | |
337 | SHORT-FORM non-nil means use short designation sequence on output. | |
338 | ASCII-EOL non-nil means designate ASCII to g0 at end of line on output. | |
339 | ASCII-CNTL non-nil means designate ASCII to g0 before control codes and | |
340 | SPACE on output. | |
341 | SEVEN non-nil means use 7-bit code only on output. | |
342 | LOCKING-SHIFT non-nil means use locking-shift. | |
343 | SINGLE-SHIFT non-nil means use single-shift. | |
344 | USE-ROMAN non-nil means designate JIS0201-1976-Roman instead of ASCII. | |
345 | USE-OLDJIS non-nil means designate JIS0208-1976 instead of JIS0208-1983. | |
346 | NO-ISO6429 non-nil means not use ISO6429's direction specification. | |
69eba008 KH |
347 | INIT-BOL non-nil means any designation state is assumed to be reset |
348 | to initial at each beginning of line on output. | |
349 | DESIGNATION-BOL non-nil means designation sequences should be placed | |
350 | at beginning of line on output. | |
4ed46869 KH |
351 | If TYPE is 4 (private), FLAGS should be a cons of CCL programs, |
352 | for encoding and decoding. See the documentation of CCL for more detail." | |
353 | ||
354 | ;; At first, set a value of `coding-system' property. | |
6e9722b0 KH |
355 | (let ((coding-spec (make-vector 5 nil)) |
356 | coding-category) | |
8057896b KH |
357 | (if (or (not (integerp type)) (< type 0) (> type 4)) |
358 | (error "TYPE argument must be 0..4")) | |
359 | (if (or (not (integerp mnemonic)) (<= mnemonic ? ) (> mnemonic 127)) | |
360 | (error "MNEMONIC arguemnt must be a printable character.")) | |
361 | (aset coding-spec 0 type) | |
362 | (aset coding-spec 1 mnemonic) | |
363 | (aset coding-spec 2 (if (stringp doc-string) doc-string "")) | |
364 | (aset coding-spec 3 nil) ; obsolete element | |
6e9722b0 KH |
365 | (cond ((= type 0) |
366 | (setq coding-category 'coding-category-emacs-mule)) | |
367 | ((= type 1) | |
368 | (setq coding-category 'coding-category-sjis)) | |
369 | ((= type 2) ; ISO2022 | |
4ed46869 | 370 | (let ((i 0) |
6e9722b0 KH |
371 | (vec (make-vector 32 nil)) |
372 | (no-initial-designation t) | |
373 | (g1-designation nil)) | |
4ed46869 KH |
374 | (while (< i 4) |
375 | (let ((charset (car flags))) | |
6e9722b0 KH |
376 | (if (and no-initial-designation |
377 | (> i 0) | |
378 | (or (charsetp charset) | |
379 | (and (consp charset) | |
380 | (charsetp (car charset))))) | |
381 | (setq no-initial-designation nil)) | |
382 | (if (charsetp charset) | |
383 | (if (= i 1) (setq g1-designation charset)) | |
384 | (if (consp charset) | |
385 | (let ((tail charset) | |
386 | elt) | |
387 | (while tail | |
388 | (setq elt (car tail)) | |
69eba008 KH |
389 | (or (not elt) (eq elt t) (charsetp elt) |
390 | (error "Invalid charset: %s" elt)) | |
6e9722b0 KH |
391 | (setq tail (cdr tail))) |
392 | (setq g1-designation (car charset))) | |
393 | (if (and charset (not (eq charset t))) | |
394 | (error "Invalid charset: %s" charset)))) | |
4ed46869 KH |
395 | (aset vec i charset)) |
396 | (setq flags (cdr flags) i (1+ i))) | |
397 | (while (and (< i 32) flags) | |
398 | (aset vec i (car flags)) | |
399 | (setq flags (cdr flags) i (1+ i))) | |
6e9722b0 KH |
400 | (aset coding-spec 4 vec) |
401 | (if no-initial-designation | |
402 | (put coding-system 'no-initial-designation t)) | |
403 | (setq coding-category | |
404 | (if (aref vec 8) ; Use locking-shift. | |
405 | 'coding-category-iso-else | |
406 | (if (aref vec 7) ; 7-bit only. | |
407 | (if (aref vec 9) ; Use single-shift. | |
408 | 'coding-category-iso-else | |
409 | 'coding-category-iso-7) | |
410 | (if no-initial-designation | |
411 | 'coding-category-iso-else | |
412 | (if (and (charsetp g1-designation) | |
413 | (= (charset-dimension g1-designation) 2)) | |
414 | 'coding-category-iso-8-2 | |
415 | 'coding-category-iso-8-1))))))) | |
416 | ((= type 3) | |
417 | (setq coding-category 'coding-category-big5)) | |
418 | ((= type 4) ; private | |
419 | (setq coding-category 'coding-category-binary) | |
4ed46869 KH |
420 | (if (and (consp flags) |
421 | (vectorp (car flags)) | |
422 | (vectorp (cdr flags))) | |
8057896b | 423 | (aset coding-spec 4 flags) |
6e9722b0 KH |
424 | (error "Invalid FLAGS argument for TYPE 4 (CCL)")))) |
425 | (put coding-system 'coding-system coding-spec) | |
426 | (put coding-system 'coding-category coding-category) | |
427 | (put coding-category 'coding-systems | |
428 | (cons coding-system (get coding-category 'coding-systems)))) | |
4ed46869 KH |
429 | |
430 | ;; Next, set a value of `eol-type' property. The value is a vector | |
6e9722b0 | 431 | ;; of subsidiary coding systems, each corresponds to a coding system |
4ed46869 | 432 | ;; for the detected end-of-line format. |
8057896b KH |
433 | (put coding-system 'eol-type |
434 | (if (<= type 3) | |
6e9722b0 | 435 | (make-subsidiary-coding-system coding-system) |
8057896b KH |
436 | 0))) |
437 | ||
438 | (defun define-coding-system-alias (coding-system alias) | |
439 | "Define ALIAS as an alias coding system of CODING-SYSTEM." | |
440 | (check-coding-system coding-system) | |
6e9722b0 KH |
441 | (let ((parent (coding-system-parent coding-system))) |
442 | (if parent | |
443 | (setq coding-system parent))) | |
8057896b | 444 | (put alias 'coding-system coding-system) |
6e9722b0 KH |
445 | (put alias 'parent-coding-system coding-system) |
446 | (put coding-system 'alias-coding-systems | |
447 | (cons alias (get coding-system 'alias-coding-systems))) | |
448 | (let ((eol-variants (coding-system-eol-type coding-system)) | |
449 | subsidiaries) | |
450 | (if (vectorp eol-variants) | |
451 | (let ((i 0)) | |
452 | (setq subsidiaries (make-subsidiary-coding-system alias)) | |
453 | (while (< i 3) | |
454 | (put (aref subsidiaries i) 'parent-coding-system | |
455 | (aref eol-variants i)) | |
456 | (put (aref eol-variants i) 'alias-coding-systems | |
457 | (cons (aref subsidiaries i) (get (aref eol-variants i) | |
458 | 'alias-coding-systems))) | |
459 | (setq i (1+ i))))))) | |
4ed46869 KH |
460 | |
461 | (defun set-buffer-file-coding-system (coding-system &optional force) | |
462 | "Set buffer-file-coding-system of the current buffer to CODING-SYSTEM. | |
463 | If eol-type of the current buffer-file-coding-system is an integer value N, and | |
a73a8c89 | 464 | eol-type of CODING-SYSTEM is a vector, the Nth element of the vector is used |
4ed46869 KH |
465 | instead of CODING-SYSTEM itself. |
466 | Optional prefix argument FORCE non-nil means CODING-SYSTEM is set | |
467 | regardless of eol-type of the current buffer-file-coding-system." | |
468 | (interactive "zBuffer-file-coding-system: \nP") | |
469 | (check-coding-system coding-system) | |
470 | (if (null force) | |
8057896b KH |
471 | (let ((x (coding-system-eol-type buffer-file-coding-system)) |
472 | (y (coding-system-eol-type coding-system))) | |
4ed46869 KH |
473 | (if (and (numberp x) (>= x 0) (<= x 2) (vectorp y)) |
474 | (setq coding-system (aref y x))))) | |
475 | (setq buffer-file-coding-system coding-system) | |
476 | (set-buffer-modified-p t) | |
477 | (force-mode-line-update)) | |
478 | ||
df100398 KH |
479 | (defun set-terminal-coding-system (coding-system) |
480 | "Set coding system of your terminal to CODING-SYSTEM. | |
481 | All outputs to terminal are encoded by the specified coding system." | |
482 | (interactive "zCoding-system for terminal display: ") | |
483 | (set-terminal-coding-system-internal coding-system) | |
484 | (redraw-frame (selected-frame))) | |
485 | ||
486 | (defun set-keyboard-coding-system (coding-system) | |
487 | "Set coding system of codes sent from terminal keyboard to CODING-SYSTEM. | |
488 | In addition, this command toggles Encoded-kbd minor mode. | |
489 | If the specified coding system is nil, Encoded-bkd mode is turned off, | |
490 | else it is turned on so that user inputs are decoded by the | |
491 | specified coding system." | |
492 | (interactive "zCoding-system for keyboard input: ") | |
493 | (set-keyboard-coding-system-internal coding-system) | |
494 | (encoded-kbd-mode (if coding-system 1 0))) | |
495 | ||
496 | (defun set-buffer-process-coding-system (decoding encoding) | |
497 | "Set coding systems to the process associated with the current buffer. | |
498 | DECODING is the coding system to be used to decode input from the process, | |
499 | ENCODING is to be used to encode output to the process." | |
4ed46869 KH |
500 | (interactive |
501 | "zCoding-system for process input: \nzCoding-system for process output: ") | |
502 | (let ((proc (get-buffer-process (current-buffer)))) | |
503 | (if (null proc) | |
504 | (error "no process") | |
df100398 KH |
505 | (check-coding-system decoding) |
506 | (check-coding-system encoding) | |
507 | (set-process-coding-system proc decoding encoding))) | |
4ed46869 KH |
508 | (force-mode-line-update)) |
509 | ||
4ed46869 KH |
510 | (defun set-coding-priority (arg) |
511 | "Set priority of coding-category according to LIST. | |
512 | LIST is a list of coding-categories ordered by priority." | |
513 | (let (l) | |
514 | ;; Put coding-categories listed in ARG to L while checking the | |
515 | ;; validity. We assume that `coding-category-list' contains whole | |
516 | ;; coding-categories. | |
517 | (while arg | |
518 | (if (null (memq (car arg) coding-category-list)) | |
519 | (error "Invalid element in argument: %s" (car arg))) | |
520 | (setq l (cons (car arg) l)) | |
521 | (setq arg (cdr arg))) | |
522 | ;; Put coding-category not listed in ARG to L. | |
523 | (while coding-category-list | |
524 | (if (null (memq (car coding-category-list) l)) | |
525 | (setq l (cons (car coding-category-list) l))) | |
526 | (setq coding-category-list (cdr coding-category-list))) | |
527 | ;; Update `coding-category-list' and return it. | |
528 | (setq coding-category-list (nreverse l)))) | |
529 | ||
530 | ;;; FILE I/O | |
531 | ||
532 | ;; Set buffer-file-coding-system of the current buffer after some text | |
533 | ;; is inserted. | |
534 | (defun after-insert-file-set-buffer-file-coding-system (inserted) | |
535 | (if last-coding-system-used | |
536 | (let ((coding-system | |
537 | (find-new-buffer-file-coding-system last-coding-system-used)) | |
538 | (modified-p (buffer-modified-p))) | |
539 | (if coding-system | |
540 | (set-buffer-file-coding-system coding-system)) | |
541 | (set-buffer-modified-p modified-p))) | |
542 | nil) | |
543 | ||
544 | (setq after-insert-file-functions | |
545 | (cons 'after-insert-file-set-buffer-file-coding-system | |
546 | after-insert-file-functions)) | |
547 | ||
8057896b | 548 | ;; The coding-spec and eol-type of coding-system returned is decided |
4ed46869 KH |
549 | ;; independently in the following order. |
550 | ;; 1. That of buffer-file-coding-system locally bound. | |
551 | ;; 2. That of CODING. | |
552 | ||
553 | (defun find-new-buffer-file-coding-system (coding) | |
554 | "Return a coding system for a buffer when a file of CODING is inserted. | |
a73a8c89 KH |
555 | The local variable `buffer-file-coding-system' of the current buffer |
556 | is set to the returned value. | |
df100398 | 557 | Return nil if there's no need of setting new buffer-file-coding-system." |
4ed46869 KH |
558 | (let (local-coding local-eol |
559 | found-eol | |
560 | new-coding new-eol) | |
561 | (if (null coding) | |
562 | ;; Nothing found about coding. | |
563 | nil | |
564 | ||
565 | ;; Get information of the current local value of | |
566 | ;; `buffer-file-coding-system' in LOCAL-EOL and LOCAL-CODING. | |
567 | (if (local-variable-p 'buffer-file-coding-system) | |
568 | ;; Something already set locally. | |
569 | (progn | |
8057896b | 570 | (setq local-eol (coding-system-eol-type buffer-file-coding-system)) |
4ed46869 KH |
571 | (if (null (numberp local-eol)) |
572 | ;; But eol-type is not yet set. | |
573 | (setq local-eol nil)) | |
574 | (if (null (eq (coding-system-type buffer-file-coding-system) t)) | |
13d5617d | 575 | ;; This is not `undecided'. |
4ed46869 KH |
576 | (progn |
577 | (setq local-coding buffer-file-coding-system) | |
578 | (while (symbolp (get local-coding 'coding-system)) | |
579 | (setq local-coding (get local-coding 'coding-system)))) | |
580 | ))) | |
581 | ||
582 | (if (and local-eol local-coding) | |
583 | ;; The current buffer has already set full coding-system, we | |
584 | ;; had better not change it. | |
585 | nil | |
586 | ||
8057896b | 587 | (setq found-eol (coding-system-eol-type coding)) |
4ed46869 KH |
588 | (if (null (numberp found-eol)) |
589 | ;; But eol-type is not found. | |
590 | (setq found-eol nil)) | |
591 | (if (eq (coding-system-type coding) t) | |
13d5617d KH |
592 | ;; This is `undecided', which means nothing found except |
593 | ;; for eol-type. | |
4ed46869 KH |
594 | (setq coding nil)) |
595 | ||
596 | ;; The local setting takes precedence over the found one. | |
597 | (setq new-coding (or local-coding coding)) | |
598 | (setq new-eol (or local-eol found-eol)) | |
599 | (if (and (numberp new-eol) | |
8057896b | 600 | (vectorp (coding-system-eol-type new-coding))) |
4ed46869 | 601 | (setq new-coding |
8057896b | 602 | (aref (coding-system-eol-type new-coding) new-eol))) |
4ed46869 KH |
603 | new-coding)))) |
604 | ||
a73a8c89 KH |
605 | (defun make-unification-table (&rest args) |
606 | "Make a unification table (char table) from arguments. | |
13d5617d KH |
607 | Each argument is a list of the form (FROM . TO), |
608 | where FROM is a character to be unified to TO. | |
609 | ||
610 | FROM can be a generic character (see make-char). In this case, TO is | |
611 | a generic character containing the same number of charcters or a | |
612 | oridinal character. If FROM and TO are both generic characters, all | |
613 | characters belonging to FROM are unified to characters belonging to TO | |
614 | without changing their position code(s)." | |
a73a8c89 KH |
615 | (let ((table (make-char-table 'character-unification-table)) |
616 | revlist) | |
617 | (while args | |
618 | (let ((elts (car args))) | |
619 | (while elts | |
13d5617d KH |
620 | (let* ((from (car (car elts))) |
621 | (from-i 0) ; degree of freedom of FROM | |
622 | (from-rev (nreverse (split-char from))) | |
623 | (to (cdr (car elts))) | |
624 | (to-i 0) ; degree of freedom of TO | |
625 | (to-rev (nreverse (split-char to)))) | |
626 | ;; Check numbers of heading 0s in FROM-REV and TO-REV. | |
627 | (while (eq (car from-rev) 0) | |
628 | (setq from-i (1+ from-i) from-rev (cdr from-rev))) | |
629 | (while (eq (car to-rev) 0) | |
630 | (setq to-i (1+ to-i) to-rev (cdr to-rev))) | |
631 | (if (and (/= from-i to-i) (/= to-i 0)) | |
632 | (error "Invalid character pair (%d . %d)" from to)) | |
633 | ;; If we have already unified TO to TO-ALT, FROM should | |
634 | ;; also be unified to TO-ALT. But, this is only if TO is | |
635 | ;; a generic character or TO-ALT is not a generic | |
636 | ;; character. | |
637 | (let ((to-alt (aref table to))) | |
638 | (if (and to-alt | |
639 | (or (> to-i 0) (not (generic-char-p to-alt)))) | |
640 | (setq to to-alt))) | |
641 | (if (> from-i 0) | |
642 | (set-char-table-default table from to) | |
643 | (aset table from to)) | |
a73a8c89 KH |
644 | ;; If we have already unified some chars to FROM, they |
645 | ;; should also be unified to TO. | |
646 | (let ((l (assq from revlist))) | |
647 | (if l | |
648 | (let ((ch (car l))) | |
649 | (setcar l to) | |
650 | (setq l (cdr l)) | |
651 | (while l | |
652 | (aset table ch to) | |
653 | (setq l (cdr l)) )))) | |
654 | ;; Now update REVLIST. | |
655 | (let ((l (assq to revlist))) | |
656 | (if l | |
657 | (setcdr l (cons from (cdr l))) | |
658 | (setq revlist (cons (list to from) revlist))))) | |
659 | (setq elts (cdr elts)))) | |
660 | (setq args (cdr args))) | |
661 | ;; Return TABLE just created. | |
662 | table)) | |
663 | ||
69eba008 KH |
664 | ;;; Initialize some variables. |
665 | ||
666 | (put 'use-default-ascent 'char-table-extra-slots 0) | |
667 | (setq use-default-ascent (make-char-table 'use-default-ascent)) | |
668 | ||
669 | ;;; | |
4ed46869 KH |
670 | (provide 'mule) |
671 | ||
672 | ;;; mule.el ends here |