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