1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
|
;;; mm-util.el --- Utility functions for Mule and low level things
;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
;; 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
;; For Emacs < 22.2.
(eval-and-compile
(unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
(eval-when-compile (require 'cl))
(require 'mail-prsvr)
(eval-and-compile
(if (featurep 'xemacs)
(unless (ignore-errors
(require 'timer-funcs))
(require 'timer))
(require 'timer)))
(defvar mm-mime-mule-charset-alist )
;; Emulate functions that are not available in every (X)Emacs version.
;; The name of a function is prefixed with mm-, like `mm-char-int' for
;; `char-int' that is a native XEmacs function, not available in Emacs.
;; Gnus programs all should use mm- functions, not the original ones.
(eval-and-compile
(mapc
(lambda (elem)
(let ((nfunc (intern (format "mm-%s" (car elem)))))
(if (fboundp (car elem))
(defalias nfunc (car elem))
(defalias nfunc (cdr elem)))))
`(;; `coding-system-list' is not available in XEmacs 21.4 built
;; without the `file-coding' feature.
(coding-system-list . ignore)
;; `char-int' is an XEmacs function, not available in Emacs.
(char-int . identity)
;; `coding-system-equal' is an Emacs function, not available in XEmacs.
(coding-system-equal . equal)
;; `annotationp' is an XEmacs function, not available in Emacs.
(annotationp . ignore)
;; `set-buffer-file-coding-system' is not available in XEmacs 21.4
;; built without the `file-coding' feature.
(set-buffer-file-coding-system . ignore)
;; `read-charset' is an Emacs function, not available in XEmacs.
(read-charset
. ,(lambda (prompt)
"Return a charset."
(intern
(completing-read
prompt
(mapcar (lambda (e) (list (symbol-name (car e))))
mm-mime-mule-charset-alist)
nil t))))
;; `subst-char-in-string' is not available in XEmacs 21.4.
(subst-char-in-string
. ,(lambda (from to string &optional inplace)
;; stolen (and renamed) from nnheader.el
"Replace characters in STRING from FROM to TO.
Unless optional argument INPLACE is non-nil, return a new string."
(let ((string (if inplace string (copy-sequence string)))
(len (length string))
(idx 0))
;; Replace all occurrences of FROM with TO.
(while (< idx len)
(when (= (aref string idx) from)
(aset string idx to))
(setq idx (1+ idx)))
string)))
;; `replace-in-string' is an XEmacs function, not available in Emacs.
(replace-in-string
. ,(lambda (string regexp rep &optional literal)
"See `replace-regexp-in-string', only the order of args differs."
(replace-regexp-in-string regexp rep string nil literal)))
;; `string-as-unibyte' is an Emacs function, not available in XEmacs.
(string-as-unibyte . identity)
;; `string-make-unibyte' is an Emacs function, not available in XEmacs.
(string-make-unibyte . identity)
;; string-as-multibyte often doesn't really do what you think it does.
;; Example:
;; (aref (string-as-multibyte "\201") 0) -> 129 (aka ?\201)
;; (aref (string-as-multibyte "\300") 0) -> 192 (aka ?\300)
;; (aref (string-as-multibyte "\300\201") 0) -> 192 (aka ?\300)
;; (aref (string-as-multibyte "\300\201") 1) -> 129 (aka ?\201)
;; but
;; (aref (string-as-multibyte "\201\300") 0) -> 2240
;; (aref (string-as-multibyte "\201\300") 1) -> <error>
;; Better use string-to-multibyte or encode-coding-string.
;; If you really need string-as-multibyte somewhere it's usually
;; because you're using the internal emacs-mule representation (maybe
;; because you're using string-as-unibyte somewhere), which is
;; generally a problem in itself.
;; Here is an approximate equivalence table to help think about it:
;; (string-as-multibyte s) ~= (decode-coding-string s 'emacs-mule)
;; (string-to-multibyte s) ~= (decode-coding-string s 'binary)
;; (string-make-multibyte s) ~= (decode-coding-string s locale-coding-system)
;; `string-as-multibyte' is an Emacs function, not available in XEmacs.
(string-as-multibyte . identity)
;; `multibyte-string-p' is an Emacs function, not available in XEmacs.
(multibyte-string-p . ignore)
;; `insert-byte' is available only in Emacs 23.1 or greater.
(insert-byte . insert-char)
;; `multibyte-char-to-unibyte' is an Emacs function, not available
;; in XEmacs.
(multibyte-char-to-unibyte . identity)
;; `set-buffer-multibyte' is an Emacs function, not available in XEmacs.
(set-buffer-multibyte . ignore)
;; `special-display-p' is an Emacs function, not available in XEmacs.
(special-display-p
. ,(lambda (buffer-name)
"Returns non-nil if a buffer named BUFFER-NAME gets a special frame."
(and special-display-function
(or (and (member buffer-name special-display-buffer-names) t)
(cdr (assoc buffer-name special-display-buffer-names))
(catch 'return
(dolist (elem special-display-regexps)
(and (stringp elem)
(string-match elem buffer-name)
(throw 'return t))
(and (consp elem)
(stringp (car elem))
(string-match (car elem) buffer-name)
(throw 'return (cdr elem)))))))))
;; `substring-no-properties' is available only in Emacs 22.1 or greater.
(substring-no-properties
. ,(lambda (string &optional from to)
"Return a substring of STRING, without text properties.
It starts at index FROM and ending before TO.
TO may be nil or omitted; then the substring runs to the end of STRING.
If FROM is nil or omitted, the substring starts at the beginning of STRING.
If FROM or TO is negative, it counts from the end.
With one argument, just copy STRING without its properties."
(setq string (substring string (or from 0) to))
(set-text-properties 0 (length string) nil string)
string))
;; `line-number-at-pos' is available only in Emacs 22.1 or greater
;; and XEmacs 21.5.
(line-number-at-pos
. ,(lambda (&optional pos)
"Return (narrowed) buffer line number at position POS.
If POS is nil, use current buffer location.
Counting starts at (point-min), so the value refers
to the contents of the accessible portion of the buffer."
(let ((opoint (or pos (point))) start)
(save-excursion
(goto-char (point-min))
(setq start (point))
(goto-char opoint)
(forward-line 0)
(1+ (count-lines start (point))))))))))
;; `decode-coding-string', `encode-coding-string', `decode-coding-region'
;; and `encode-coding-region' are available in Emacs and XEmacs built with
;; the `file-coding' feature, but the XEmacs versions treat nil, that is
;; given as the `coding-system' argument, as the `binary' coding system.
(eval-and-compile
(if (featurep 'xemacs)
(if (featurep 'file-coding)
(progn
(defun mm-decode-coding-string (str coding-system)
(if coding-system
(decode-coding-string str coding-system)
str))
(defun mm-encode-coding-string (str coding-system)
(if coding-system
(encode-coding-string str coding-system)
str))
(defun mm-decode-coding-region (start end coding-system)
(if coding-system
(decode-coding-region start end coding-system)))
(defun mm-encode-coding-region (start end coding-system)
(if coding-system
(encode-coding-region start end coding-system))))
(defun mm-decode-coding-string (str coding-system) str)
(defun mm-encode-coding-string (str coding-system) str)
(defalias 'mm-decode-coding-region 'ignore)
(defalias 'mm-encode-coding-region 'ignore))
(defalias 'mm-decode-coding-string 'decode-coding-string)
(defalias 'mm-encode-coding-string 'encode-coding-string)
(defalias 'mm-decode-coding-region 'decode-coding-region)
(defalias 'mm-encode-coding-region 'encode-coding-region)))
;; `string-to-multibyte' is available only in Emacs 22.1 or greater.
(defalias 'mm-string-to-multibyte
(cond
((featurep 'xemacs)
'identity)
((fboundp 'string-to-multibyte)
'string-to-multibyte)
(t
(lambda (string)
"Return a multibyte string with the same individual chars as STRING."
(mapconcat
(lambda (ch) (mm-string-as-multibyte (char-to-string ch)))
string "")))))
;; `char-or-char-int-p' is an XEmacs function, not available in Emacs.
(eval-and-compile
(defalias 'mm-char-or-char-int-p
(cond
((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
((fboundp 'char-valid-p) 'char-valid-p)
(t 'identity))))
;; `ucs-to-char' is a function that Mule-UCS provides.
(if (featurep 'xemacs)
(cond ((and (fboundp 'unicode-to-char) ;; XEmacs 21.5.
(subrp (symbol-function 'unicode-to-char)))
(if (featurep 'mule)
(defalias 'mm-ucs-to-char 'unicode-to-char)
(defun mm-ucs-to-char (codepoint)
"Convert Unicode codepoint to character."
(or (unicode-to-char codepoint) ?#))))
((featurep 'mule)
(defun mm-ucs-to-char (codepoint)
"Convert Unicode codepoint to character."
(if (fboundp 'ucs-to-char) ;; Mule-UCS is loaded.
(progn
(defalias 'mm-ucs-to-char
(lambda (codepoint)
"Convert Unicode codepoint to character."
(condition-case nil
(or (ucs-to-char codepoint) ?#)
(error ?#))))
(mm-ucs-to-char codepoint))
(condition-case nil
(or (int-to-char codepoint) ?#)
(error ?#)))))
(t
(defun mm-ucs-to-char (codepoint)
"Convert Unicode codepoint to character."
(condition-case nil
(or (int-to-char codepoint) ?#)
(error ?#)))))
(if (let ((char (make-char 'japanese-jisx0208 36 34)))
(eq char (decode-char 'ucs char)))
;; Emacs 23.
(defalias 'mm-ucs-to-char 'identity)
(defun mm-ucs-to-char (codepoint)
"Convert Unicode codepoint to character."
(or (decode-char 'ucs codepoint) ?#))))
;; Fixme: This seems always to be used to read a MIME charset, so it
;; should be re-named and fixed (in Emacs) to offer completion only on
;; proper charset names (base coding systems which have a
;; mime-charset defined). XEmacs doesn't believe in mime-charset;
;; test with
;; `(or (coding-system-get 'iso-8859-1 'mime-charset)
;; (coding-system-get 'iso-8859-1 :mime-charset))'
;; Actually, there should be an `mm-coding-system-mime-charset'.
(eval-and-compile
(defalias 'mm-read-coding-system
(cond
((fboundp 'read-coding-system)
(if (and (featurep 'xemacs)
(<= (string-to-number emacs-version) 21.1))
(lambda (prompt &optional default-coding-system)
(read-coding-system prompt))
'read-coding-system))
(t (lambda (prompt &optional default-coding-system)
"Prompt the user for a coding system."
(completing-read
prompt (mapcar (lambda (s) (list (symbol-name (car s))))
mm-mime-mule-charset-alist)))))))
(defvar mm-coding-system-list nil)
(defun mm-get-coding-system-list ()
"Get the coding system list."
(or mm-coding-system-list
(setq mm-coding-system-list (mm-coding-system-list))))
(defun mm-coding-system-p (cs)
"Return non-nil if CS is a symbol naming a coding system.
In XEmacs, also return non-nil if CS is a coding system object.
If CS is available, return CS itself in Emacs, and return a coding
system object in XEmacs."
(if (fboundp 'find-coding-system)
(and cs (find-coding-system cs))
(if (fboundp 'coding-system-p)
(when (coding-system-p cs)
cs)
;; no-MULE XEmacs:
(car (memq cs (mm-get-coding-system-list))))))
(defun mm-codepage-setup (number &optional alias)
"Create a coding system cpNUMBER.
The coding system is created using `codepage-setup'. If ALIAS is
non-nil, an alias is created and added to
`mm-charset-synonym-alist'. If ALIAS is a string, it's used as
the alias. Else windows-NUMBER is used."
(interactive
(let ((completion-ignore-case t)
(candidates (if (fboundp 'cp-supported-codepages)
(cp-supported-codepages)
;; Removed in Emacs 23 (unicode), so signal an error:
(error "`codepage-setup' not present in this Emacs version"))))
(list (completing-read "Setup DOS Codepage: (default 437) " candidates
nil t nil nil "437"))))
(when alias
(setq alias (if (stringp alias)
(intern alias)
(intern (format "windows-%s" number)))))
(let* ((cp (intern (format "cp%s" number))))
(unless (mm-coding-system-p cp)
(if (fboundp 'codepage-setup) ; silence compiler
(codepage-setup number)
(error "`codepage-setup' not present in this Emacs version")))
(when (and alias
;; Don't add alias if setup of cp failed.
(mm-coding-system-p cp))
(add-to-list 'mm-charset-synonym-alist (cons alias cp)))))
(defvar mm-charset-synonym-alist
`(
;; Not in XEmacs, but it's not a proper MIME charset anyhow.
,@(unless (mm-coding-system-p 'x-ctext)
'((x-ctext . ctext)))
;; ISO-8859-15 is very similar to ISO-8859-1. But it's _different_ in 8
;; positions!
,@(unless (mm-coding-system-p 'iso-8859-15)
'((iso-8859-15 . iso-8859-1)))
;; BIG-5HKSCS is similar to, but different than, BIG-5.
,@(unless (mm-coding-system-p 'big5-hkscs)
'((big5-hkscs . big5)))
;; A Microsoft misunderstanding.
,@(when (and (not (mm-coding-system-p 'unicode))
(mm-coding-system-p 'utf-16-le))
'((unicode . utf-16-le)))
;; A Microsoft misunderstanding.
,@(unless (mm-coding-system-p 'ks_c_5601-1987)
(if (mm-coding-system-p 'cp949)
'((ks_c_5601-1987 . cp949))
'((ks_c_5601-1987 . euc-kr))))
;; Windows-31J is Windows Codepage 932.
,@(when (and (not (mm-coding-system-p 'windows-31j))
(mm-coding-system-p 'cp932))
'((windows-31j . cp932)))
;; Charset name: GBK, Charset aliases: CP936, MS936, windows-936
;; http://www.iana.org/assignments/charset-reg/GBK
;; Emacs 22.1 has cp936, but not gbk, so we alias it:
,@(when (and (not (mm-coding-system-p 'gbk))
(mm-coding-system-p 'cp936))
'((gbk . cp936)))
;; UTF8 is a bogus name for UTF-8
,@(when (and (not (mm-coding-system-p 'utf8))
(mm-coding-system-p 'utf-8))
'((utf8 . utf-8)))
;; ISO8859-1 is a bogus name for ISO-8859-1
,@(when (and (not (mm-coding-system-p 'iso8859-1))
(mm-coding-system-p 'iso-8859-1))
'((iso8859-1 . iso-8859-1)))
;; ISO_8859-1 is a bogus name for ISO-8859-1
,@(when (and (not (mm-coding-system-p 'iso_8859-1))
(mm-coding-system-p 'iso-8859-1))
'((iso_8859-1 . iso-8859-1)))
)
"A mapping from unknown or invalid charset names to the real charset names.
See `mm-codepage-iso-8859-list' and `mm-codepage-ibm-list'.")
(defcustom mm-codepage-iso-8859-list
(list 1250 ;; Windows-1250 is a variant of Latin-2 heavily used by Microsoft
;; Outlook users in Czech republic. Use this to allow reading of
;; their e-mails. cp1250 should be defined by M-x codepage-setup
;; (Emacs 21).
'(1252 . 1) ;; Windows-1252 is a superset of iso-8859-1 (West
;; Europe). See also `gnus-article-dumbquotes-map'.
'(1254 . 9) ;; Windows-1254 is a superset of iso-8859-9 (Turkish).
'(1255 . 8));; Windows-1255 is a superset of iso-8859-8 (Hebrew).
"A list of Windows codepage numbers and iso-8859 charset numbers.
If an element is a number corresponding to a supported windows
codepage, appropriate entries to `mm-charset-synonym-alist' are
added by `mm-setup-codepage-iso-8859'. An element may also be a
cons cell where the car is a codepage number and the cdr is the
corresponding number of an iso-8859 charset."
:type '(list (set :inline t
(const 1250 :tag "Central and East European")
(const (1252 . 1) :tag "West European")
(const (1254 . 9) :tag "Turkish")
(const (1255 . 8) :tag "Hebrew"))
(repeat :inline t
:tag "Other options"
(choice
(integer :tag "Windows codepage number")
(cons (integer :tag "Windows codepage number")
(integer :tag "iso-8859 charset number")))))
:version "22.1" ;; Gnus 5.10.9
:group 'mime)
(defcustom mm-codepage-ibm-list
(list 437 ;; (US etc.)
860 ;; (Portugal)
861 ;; (Iceland)
862 ;; (Israel)
863 ;; (Canadian French)
865 ;; (Nordic)
852 ;;
850 ;; (Latin 1)
855 ;; (Cyrillic)
866 ;; (Cyrillic - Russian)
857 ;; (Turkish)
864 ;; (Arabic)
869 ;; (Greek)
874);; (Thai)
;; In Emacs 23 (unicode), cp... and ibm... are aliases.
;; Cf. http://thread.gmane.org/v9lkng5nwy.fsf@marauder.physik.uni-ulm.de
"List of IBM codepage numbers.
The codepage mappings slighly differ between IBM and other vendors.
See \"ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/IBM/README.TXT\".
If an element is a number corresponding to a supported windows
codepage, appropriate entries to `mm-charset-synonym-alist' are
added by `mm-setup-codepage-ibm'."
:type '(list (set :inline t
(const 437 :tag "US etc.")
(const 860 :tag "Portugal")
(const 861 :tag "Iceland")
(const 862 :tag "Israel")
(const 863 :tag "Canadian French")
(const 865 :tag "Nordic")
(const 852)
(const 850 :tag "Latin 1")
(const 855 :tag "Cyrillic")
(const 866 :tag "Cyrillic - Russian")
(const 857 :tag "Turkish")
(const 864 :tag "Arabic")
(const 869 :tag "Greek")
(const 874 :tag "Thai"))
(repeat :inline t
:tag "Other options"
(integer :tag "Codepage number")))
:version "22.1" ;; Gnus 5.10.9
:group 'mime)
(defun mm-setup-codepage-iso-8859 (&optional list)
"Add appropriate entries to `mm-charset-synonym-alist'.
Unless LIST is given, `mm-codepage-iso-8859-list' is used."
(unless list
(setq list mm-codepage-iso-8859-list))
(dolist (i list)
(let (cp windows iso)
(if (consp i)
(setq cp (intern (format "cp%d" (car i)))
windows (intern (format "windows-%d" (car i)))
iso (intern (format "iso-8859-%d" (cdr i))))
(setq cp (intern (format "cp%d" i))
windows (intern (format "windows-%d" i))))
(unless (mm-coding-system-p windows)
(if (mm-coding-system-p cp)
(add-to-list 'mm-charset-synonym-alist (cons windows cp))
(add-to-list 'mm-charset-synonym-alist (cons windows iso)))))))
(defun mm-setup-codepage-ibm (&optional list)
"Add appropriate entries to `mm-charset-synonym-alist'.
Unless LIST is given, `mm-codepage-ibm-list' is used."
(unless list
(setq list mm-codepage-ibm-list))
(dolist (number list)
(let ((ibm (intern (format "ibm%d" number)))
(cp (intern (format "cp%d" number))))
(when (and (not (mm-coding-system-p ibm))
(mm-coding-system-p cp))
(add-to-list 'mm-charset-synonym-alist (cons ibm cp))))))
;; Initialize:
(mm-setup-codepage-iso-8859)
(mm-setup-codepage-ibm)
;; Note: this has to be defined before `mm-charset-to-coding-system'.
(defcustom mm-charset-eval-alist
(if (featurep 'xemacs)
nil ;; I don't know what would be useful for XEmacs.
'(;; Emacs 21 offers 1250 1251 1253 1257. Emacs 22 provides autoloads for
;; 1250-1258 (i.e. `mm-codepage-setup' does nothing).
(windows-1250 . (mm-codepage-setup 1250 t))
(windows-1251 . (mm-codepage-setup 1251 t))
(windows-1253 . (mm-codepage-setup 1253 t))
(windows-1257 . (mm-codepage-setup 1257 t))))
"An alist of (CHARSET . FORM) pairs.
If an article is encoded in an unknown CHARSET, FORM is
evaluated. This allows to load additional libraries providing
charsets on demand. If supported by your Emacs version, you
could use `autoload-coding-system' here."
:version "22.1" ;; Gnus 5.10.9
:type '(list (set :inline t
(const (windows-1250 . (mm-codepage-setup 1250 t)))
(const (windows-1251 . (mm-codepage-setup 1251 t)))
(const (windows-1253 . (mm-codepage-setup 1253 t)))
(const (windows-1257 . (mm-codepage-setup 1257 t)))
(const (cp850 . (mm-codepage-setup 850 nil))))
(repeat :inline t
:tag "Other options"
(cons (symbol :tag "charset")
(symbol :tag "form"))))
:group 'mime)
(put 'mm-charset-eval-alist 'risky-local-variable t)
(defvar mm-charset-override-alist)
;; Note: this function has to be defined before `mm-charset-override-alist'
;; since it will use this function in order to determine its default value
;; when loading mm-util.elc.
(defun mm-charset-to-coding-system (charset &optional lbt
allow-override silent)
"Return coding-system corresponding to CHARSET.
CHARSET is a symbol naming a MIME charset.
If optional argument LBT (`unix', `dos' or `mac') is specified, it is
used as the line break code type of the coding system.
If ALLOW-OVERRIDE is given, use `mm-charset-override-alist' to
map undesired charset names to their replacement. This should
only be used for decoding, not for encoding.
A non-nil value of SILENT means don't issue a warning even if CHARSET
is not available."
;; OVERRIDE is used (only) in `mm-decode-body' and `mm-decode-string'.
(when (stringp charset)
(setq charset (intern (downcase charset))))
(when lbt
(setq charset (intern (format "%s-%s" charset lbt))))
(cond
((null charset)
charset)
;; Running in a non-MULE environment.
((or (null (mm-get-coding-system-list))
(not (fboundp 'coding-system-get)))
charset)
;; Check override list quite early. Should only used for decoding, not for
;; encoding!
((and allow-override
(let ((cs (cdr (assq charset mm-charset-override-alist))))
(and cs (mm-coding-system-p cs) cs))))
;; ascii
((eq charset 'us-ascii)
'ascii)
;; Check to see whether we can handle this charset. (This depends
;; on there being some coding system matching each `mime-charset'
;; property defined, as there should be.)
((and (mm-coding-system-p charset)
;;; Doing this would potentially weed out incorrect charsets.
;;; charset
;;; (eq charset (coding-system-get charset 'mime-charset))
)
charset)
;; Eval expressions from `mm-charset-eval-alist'
((let* ((el (assq charset mm-charset-eval-alist))
(cs (car el))
(form (cdr el)))
(and cs
form
(prog2
;; Avoid errors...
(condition-case nil (eval form) (error nil))
;; (message "Failed to eval `%s'" form))
(mm-coding-system-p cs)
(message "Added charset `%s' via `mm-charset-eval-alist'" cs))
cs)))
;; Translate invalid charsets.
((let ((cs (cdr (assq charset mm-charset-synonym-alist))))
(and cs
(mm-coding-system-p cs)
;; (message
;; "Using synonym `%s' from `mm-charset-synonym-alist' for `%s'"
;; cs charset)
cs)))
;; Last resort: search the coding system list for entries which
;; have the right mime-charset in case the canonical name isn't
;; defined (though it should be).
((let (cs)
;; mm-get-coding-system-list returns a list of cs without lbt.
;; Do we need -lbt?
(dolist (c (mm-get-coding-system-list))
(if (and (null cs)
(eq charset (or (coding-system-get c :mime-charset)
(coding-system-get c 'mime-charset))))
(setq cs c)))
(unless (or silent cs)
;; Warn the user about unknown charset:
(if (fboundp 'gnus-message)
(gnus-message 7 "Unknown charset: %s" charset)
(message "Unknown charset: %s" charset)))
cs))))
;; Note: `mm-charset-to-coding-system' has to be defined before this.
(defcustom mm-charset-override-alist
;; Note: pairs that cannot be used in the Emacs version currently running
;; will be removed.
'((gb2312 . gbk)
(iso-8859-1 . windows-1252)
(iso-8859-8 . windows-1255)
(iso-8859-9 . windows-1254))
"A mapping from undesired charset names to their replacement.
You may add pairs like (iso-8859-1 . windows-1252) here,
i.e. treat iso-8859-1 as windows-1252. windows-1252 is a
superset of iso-8859-1."
:type
'(list
:convert-widget
(lambda (widget)
(let ((defaults
(delq nil
(mapcar (lambda (pair)
(if (mm-charset-to-coding-system (cdr pair)
nil nil t)
pair))
'((gb2312 . gbk)
(iso-8859-1 . windows-1252)
(iso-8859-8 . windows-1255)
(iso-8859-9 . windows-1254)
(undecided . windows-1252)))))
(val (copy-sequence (default-value 'mm-charset-override-alist)))
pair rest)
(while val
(push (if (and (prog1
(setq pair (assq (caar val) defaults))
(setq defaults (delq pair defaults)))
(equal (car val) pair))
`(const ,pair)
`(cons :format "%v"
(const :format "(%v" ,(caar val))
(symbol :size 3 :format " . %v)\n" ,(cdar val))))
rest)
(setq val (cdr val)))
(while defaults
(push `(const ,(pop defaults)) rest))
(widget-convert
'list
`(set :inline t :format "%v" ,@(nreverse rest))
`(repeat :inline t :tag "Other options"
(cons :format "%v"
(symbol :size 3 :format "(%v")
(symbol :size 3 :format " . %v)\n")))))))
;; Remove pairs that cannot be used in the Emacs version currently
;; running. Note that this section will be evaluated when loading
;; mm-util.elc.
:set (lambda (symbol value)
(custom-set-default
symbol (delq nil
(mapcar (lambda (pair)
(if (mm-charset-to-coding-system (cdr pair)
nil nil t)
pair))
value))))
:version "22.1" ;; Gnus 5.10.9
:group 'mime)
(defvar mm-binary-coding-system
(cond
((mm-coding-system-p 'binary) 'binary)
((mm-coding-system-p 'no-conversion) 'no-conversion)
(t nil))
"100% binary coding system.")
(defvar mm-text-coding-system
(or (if (memq system-type '(windows-nt ms-dos ms-windows))
(and (mm-coding-system-p 'raw-text-dos) 'raw-text-dos)
(and (mm-coding-system-p 'raw-text) 'raw-text))
mm-binary-coding-system)
"Text-safe coding system (For removing ^M).")
(defvar mm-text-coding-system-for-write nil
"Text coding system for write.")
(defvar mm-auto-save-coding-system
(cond
((mm-coding-system-p 'utf-8-emacs) ; Mule 7
(if (memq system-type '(windows-nt ms-dos ms-windows))
(if (mm-coding-system-p 'utf-8-emacs-dos)
'utf-8-emacs-dos mm-binary-coding-system)
'utf-8-emacs))
((mm-coding-system-p 'emacs-mule)
(if (memq system-type '(windows-nt ms-dos ms-windows))
(if (mm-coding-system-p 'emacs-mule-dos)
'emacs-mule-dos mm-binary-coding-system)
'emacs-mule))
((mm-coding-system-p 'escape-quoted) 'escape-quoted)
(t mm-binary-coding-system))
"Coding system of auto save file.")
(defvar mm-universal-coding-system mm-auto-save-coding-system
"The universal coding system.")
;; Fixme: some of the cars here aren't valid MIME charsets. That
;; should only matter with XEmacs, though.
(defvar mm-mime-mule-charset-alist
`((us-ascii ascii)
(iso-8859-1 latin-iso8859-1)
(iso-8859-2 latin-iso8859-2)
(iso-8859-3 latin-iso8859-3)
(iso-8859-4 latin-iso8859-4)
(iso-8859-5 cyrillic-iso8859-5)
;; Non-mule (X)Emacs uses the last mule-charset for 8bit characters.
;; The fake mule-charset, gnus-koi8-r, tells Gnus that the default
;; charset is koi8-r, not iso-8859-5.
(koi8-r cyrillic-iso8859-5 gnus-koi8-r)
(iso-8859-6 arabic-iso8859-6)
(iso-8859-7 greek-iso8859-7)
(iso-8859-8 hebrew-iso8859-8)
(iso-8859-9 latin-iso8859-9)
(iso-8859-14 latin-iso8859-14)
(iso-8859-15 latin-iso8859-15)
(viscii vietnamese-viscii-lower)
(iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
(euc-kr korean-ksc5601)
(gb2312 chinese-gb2312)
(gbk chinese-gbk)
(gb18030 gb18030-2-byte
gb18030-4-byte-bmp gb18030-4-byte-smp
gb18030-4-byte-ext-1 gb18030-4-byte-ext-2)
(big5 chinese-big5-1 chinese-big5-2)
(tibetan tibetan)
(thai-tis620 thai-tis620)
(windows-1251 cyrillic-iso8859-5)
(iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
(iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
korean-ksc5601 japanese-jisx0212)
(iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
korean-ksc5601 japanese-jisx0212
chinese-cns11643-1 chinese-cns11643-2)
(iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
cyrillic-iso8859-5 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
korean-ksc5601 japanese-jisx0212
chinese-cns11643-1 chinese-cns11643-2
chinese-cns11643-3 chinese-cns11643-4
chinese-cns11643-5 chinese-cns11643-6
chinese-cns11643-7)
(iso-2022-jp-3 latin-jisx0201 japanese-jisx0208-1978 japanese-jisx0208
japanese-jisx0213-1 japanese-jisx0213-2)
(shift_jis latin-jisx0201 katakana-jisx0201 japanese-jisx0208)
,(cond ((fboundp 'unicode-precedence-list)
(cons 'utf-8 (delq 'ascii (mapcar 'charset-name
(unicode-precedence-list)))))
((or (not (fboundp 'charsetp)) ;; non-Mule case
(charsetp 'unicode-a)
(not (mm-coding-system-p 'mule-utf-8)))
'(utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e))
(t ;; If we have utf-8 we're in Mule 5+.
(append '(utf-8)
(delete 'ascii
(coding-system-get 'mule-utf-8 'safe-charsets))))))
"Alist of MIME-charset/MULE-charsets.")
(defun mm-enrich-utf-8-by-mule-ucs ()
"Make the `utf-8' MIME charset usable by the Mule-UCS package.
This function will run when the `un-define' module is loaded under
XEmacs, and fill the `utf-8' entry in `mm-mime-mule-charset-alist'
with Mule charsets. It is completely useless for Emacs."
(when (boundp 'unicode-basic-translation-charset-order-list)
(condition-case nil
(let ((val (delq
'ascii
(copy-sequence
(symbol-value
'unicode-basic-translation-charset-order-list))))
(elem (assq 'utf-8 mm-mime-mule-charset-alist)))
(if elem
(setcdr elem val)
(setq mm-mime-mule-charset-alist
(nconc mm-mime-mule-charset-alist
(list (cons 'utf-8 val))))))
(error))))
;; Correct by construction, but should be unnecessary for Emacs:
(if (featurep 'xemacs)
(eval-after-load "un-define" '(mm-enrich-utf-8-by-mule-ucs))
(when (and (fboundp 'coding-system-list)
(fboundp 'sort-coding-systems))
(let ((css (sort-coding-systems (coding-system-list 'base-only)))
cs mime mule alist)
(while css
(setq cs (pop css)
mime (or (coding-system-get cs :mime-charset); Emacs 23 (unicode)
(coding-system-get cs 'mime-charset)))
(when (and mime
(not (eq t (setq mule
(coding-system-get cs 'safe-charsets))))
(not (assq mime alist)))
(push (cons mime (delq 'ascii mule)) alist)))
(setq mm-mime-mule-charset-alist (nreverse alist)))))
(defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
"A list of special charsets.
Valid elements include:
`iso-8859-15' convert ISO-8859-1, -9 to ISO-8859-15 if ISO-8859-15 exists.
`iso-2022-jp-2' convert ISO-2022-jp to ISO-2022-jp-2 if ISO-2022-jp-2 exists."
)
(defvar mm-iso-8859-15-compatible
'((iso-8859-1 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE")
(iso-8859-9 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE\xD0\xDD\xDE\xF0\xFD\xFE"))
"ISO-8859-15 exchangeable coding systems and inconvertible characters.")
(defvar mm-iso-8859-x-to-15-table
(and (fboundp 'coding-system-p)
(mm-coding-system-p 'iso-8859-15)
(mapcar
(lambda (cs)
(if (mm-coding-system-p (car cs))
(let ((c (string-to-char
(decode-coding-string "\341" (car cs)))))
(cons (char-charset c)
(cons
(- (string-to-char
(decode-coding-string "\341" 'iso-8859-15)) c)
(string-to-list (decode-coding-string (car (cdr cs))
(car cs))))))
'(gnus-charset 0)))
mm-iso-8859-15-compatible))
"A table of the difference character between ISO-8859-X and ISO-8859-15.")
(defcustom mm-coding-system-priorities
(let ((lang (if (boundp 'current-language-environment)
(symbol-value 'current-language-environment))))
(cond (;; XEmacs without Mule but with `file-coding'.
(not lang) nil)
;; In XEmacs 21.5 it may be the one like "Japanese (UTF-8)".
((string-match "\\`Japanese" lang)
;; Japanese users prefer iso-2022-jp to euc-japan or
;; shift_jis, however iso-8859-1 should be used when
;; there are only ASCII text and Latin-1 characters.
'(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8))))
"Preferred coding systems for encoding outgoing messages.
More than one suitable coding system may be found for some text.
By default, the coding system with the highest priority is used
to encode outgoing messages (see `sort-coding-systems'). If this
variable is set, it overrides the default priority."
:version "21.2"
:type '(repeat (symbol :tag "Coding system"))
:group 'mime)
;; ??
(defvar mm-use-find-coding-systems-region
(fboundp 'find-coding-systems-region)
"Use `find-coding-systems-region' to find proper coding systems.
Setting it to nil is useful on Emacsen supporting Unicode if sending
mail with multiple parts is preferred to sending a Unicode one.")
;;; Internal variables:
;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
"Return the MIME charset corresponding to the given Mule CHARSET."
(if (and (fboundp 'find-coding-systems-for-charsets)
(fboundp 'sort-coding-systems))
(let ((css (sort (sort-coding-systems
(find-coding-systems-for-charsets (list charset)))
'mm-sort-coding-systems-predicate))
cs mime)
(while (and (not mime)
css)
(when (setq cs (pop css))
(setq mime (or (coding-system-get cs :mime-charset)
(coding-system-get cs 'mime-charset)))))
mime)
(let ((alist (mapcar (lambda (cs)
(assq cs mm-mime-mule-charset-alist))
(sort (mapcar 'car mm-mime-mule-charset-alist)
'mm-sort-coding-systems-predicate)))
out)
(while alist
(when (memq charset (cdar alist))
(setq out (caar alist)
alist nil))
(pop alist))
out)))
(eval-and-compile
(defvar mm-emacs-mule (and (not (featurep 'xemacs))
(boundp 'enable-multibyte-characters)
(default-value 'enable-multibyte-characters)
(fboundp 'set-buffer-multibyte))
"True in Emacs with Mule.")
(if mm-emacs-mule
(defun mm-enable-multibyte ()
"Set the multibyte flag of the current buffer.
Only do this if the default value of `enable-multibyte-characters' is
non-nil. This is a no-op in XEmacs."
(set-buffer-multibyte 'to))
(defalias 'mm-enable-multibyte 'ignore))
(if mm-emacs-mule
(defun mm-disable-multibyte ()
"Unset the multibyte flag of in the current buffer.
This is a no-op in XEmacs."
(set-buffer-multibyte nil))
(defalias 'mm-disable-multibyte 'ignore)))
(defun mm-preferred-coding-system (charset)
;; A typo in some Emacs versions.
(or (get-charset-property charset 'preferred-coding-system)
(get-charset-property charset 'prefered-coding-system)))
;; Mule charsets shouldn't be used.
(defsubst mm-guess-charset ()
"Guess Mule charset from the language environment."
(or
mail-parse-mule-charset ;; cached mule-charset
(progn
(setq mail-parse-mule-charset
(and (boundp 'current-language-environment)
(car (last
(assq 'charset
(assoc current-language-environment
language-info-alist))))))
(if (or (not mail-parse-mule-charset)
(eq mail-parse-mule-charset 'ascii))
(setq mail-parse-mule-charset
(or (car (last (assq mail-parse-charset
mm-mime-mule-charset-alist)))
;; default
'latin-iso8859-1)))
mail-parse-mule-charset)))
(defun mm-charset-after (&optional pos)
"Return charset of a character in current buffer at position POS.
If POS is nil, it defauls to the current point.
If POS is out of range, the value is nil.
If the charset is `composition', return the actual one."
(let ((char (char-after pos)) charset)
(if (< (mm-char-int char) 128)
(setq charset 'ascii)
;; charset-after is fake in some Emacsen.
(setq charset (and (fboundp 'char-charset) (char-charset char)))
(if (eq charset 'composition) ; Mule 4
(let ((p (or pos (point))))
(cadr (find-charset-region p (1+ p))))
(if (and charset (not (memq charset '(ascii eight-bit-control
eight-bit-graphic))))
charset
(mm-guess-charset))))))
(defun mm-mime-charset (charset)
"Return the MIME charset corresponding to the given Mule CHARSET."
(if (eq charset 'unknown)
(error "The message contains non-printable characters, please use attachment"))
(if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
;; This exists in Emacs 20.
(or
(and (mm-preferred-coding-system charset)
(or (coding-system-get
(mm-preferred-coding-system charset) :mime-charset)
(coding-system-get
(mm-preferred-coding-system charset) 'mime-charset)))
(and (eq charset 'ascii)
'us-ascii)
(mm-preferred-coding-system charset)
(mm-mule-charset-to-mime-charset charset))
;; This is for XEmacs.
(mm-mule-charset-to-mime-charset charset)))
(if (fboundp 'delete-dups)
(defalias 'mm-delete-duplicates 'delete-dups)
(defun mm-delete-duplicates (list)
"Destructively remove `equal' duplicates from LIST.
Store the result in LIST and return it. LIST must be a proper list.
Of several `equal' occurrences of an element in LIST, the first
one is kept.
This is a compatibility function for Emacsen without `delete-dups'."
;; Code from `subr.el' in Emacs 22:
(let ((tail list))
(while tail
(setcdr tail (delete (car tail) (cdr tail)))
(setq tail (cdr tail))))
list))
;; Fixme: This is used in places when it should be testing the
;; default multibyteness. See mm-default-multibyte-p.
(eval-and-compile
(if (and (not (featurep 'xemacs))
(boundp 'enable-multibyte-characters))
(defun mm-multibyte-p ()
"Non-nil if multibyte is enabled in the current buffer."
enable-multibyte-characters)
(defun mm-multibyte-p () (featurep 'mule))))
(defun mm-default-multibyte-p ()
"Return non-nil if the session is multibyte.
This affects whether coding conversion should be attempted generally."
(if (featurep 'mule)
(if (boundp 'enable-multibyte-characters)
(default-value 'enable-multibyte-characters)
t)))
(defun mm-iso-8859-x-to-15-region (&optional b e)
(if (fboundp 'char-charset)
(let (charset item c inconvertible)
(save-restriction
(if e (narrow-to-region b e))
(goto-char (point-min))
(skip-chars-forward "\0-\177")
(while (not (eobp))
(cond
((not (setq item (assq (char-charset (setq c (char-after)))
mm-iso-8859-x-to-15-table)))
(forward-char))
((memq c (cdr (cdr item)))
(setq inconvertible t)
(forward-char))
(t
(insert-before-markers (prog1 (+ c (car (cdr item)))
(delete-char 1)))))
(skip-chars-forward "\0-\177")))
(not inconvertible))))
(defun mm-sort-coding-systems-predicate (a b)
(let ((priorities
(mapcar (lambda (cs)
;; Note: invalid entries are dropped silently
(and (setq cs (mm-coding-system-p cs))
(coding-system-base cs)))
mm-coding-system-priorities)))
(and (setq a (mm-coding-system-p a))
(if (setq b (mm-coding-system-p b))
(> (length (memq (coding-system-base a) priorities))
(length (memq (coding-system-base b) priorities)))
t))))
(eval-when-compile
(autoload 'latin-unity-massage-name "latin-unity")
(autoload 'latin-unity-maybe-remap "latin-unity")
(autoload 'latin-unity-representations-feasible-region "latin-unity")
(autoload 'latin-unity-representations-present-region "latin-unity"))
(defvar latin-unity-coding-systems)
(defvar latin-unity-ucs-list)
(defun mm-xemacs-find-mime-charset-1 (begin end)
"Determine which MIME charset to use to send region as message.
This uses the XEmacs-specific latin-unity package to better handle the
case where identical characters from diverse ISO-8859-? character sets
can be encoded using a single one of the corresponding coding systems.
It treats `mm-coding-system-priorities' as the list of preferred
coding systems; a useful example setting for this list in Western
Europe would be '(iso-8859-1 iso-8859-15 utf-8), which would default
to the very standard Latin 1 coding system, and only move to coding
systems that are less supported as is necessary to encode the
characters that exist in the buffer.
Latin Unity doesn't know about those non-ASCII Roman characters that
are available in various East Asian character sets. As such, its
behavior if you have a JIS 0212 LATIN SMALL LETTER A WITH ACUTE in a
buffer and it can otherwise be encoded as Latin 1, won't be ideal.
But this is very much a corner case, so don't worry about it."
(let ((systems mm-coding-system-priorities) csets psets curset)
;; Load the Latin Unity library, if available.
(when (and (not (featurep 'latin-unity)) (locate-library "latin-unity"))
(require 'latin-unity))
;; Now, can we use it?
(if (featurep 'latin-unity)
(progn
(setq csets (latin-unity-representations-feasible-region begin end)
psets (latin-unity-representations-present-region begin end))
(catch 'done
;; Pass back the first coding system in the preferred list
;; that can encode the whole region.
(dolist (curset systems)
(setq curset (latin-unity-massage-name 'buffer-default curset))
;; If the coding system is a universal coding system, then
;; it can certainly encode all the characters in the region.
(if (memq curset latin-unity-ucs-list)
(throw 'done (list curset)))
;; If a coding system isn't universal, and isn't in
;; the list that latin unity knows about, we can't
;; decide whether to use it here. Leave that until later
;; in `mm-find-mime-charset-region' function, whence we
;; have been called.
(unless (memq curset latin-unity-coding-systems)
(throw 'done nil))
;; Right, we know about this coding system, and it may
;; conceivably be able to encode all the characters in
;; the region.
(if (latin-unity-maybe-remap begin end curset csets psets t)
(throw 'done (list curset))))
;; Can't encode using anything from the
;; `mm-coding-system-priorities' list.
;; Leave `mm-find-mime-charset' to do most of the work.
nil))
;; Right, latin unity isn't available; let `mm-find-charset-region'
;; take its default action, which equally applies to GNU Emacs.
nil)))
(defmacro mm-xemacs-find-mime-charset (begin end)
(when (featurep 'xemacs)
`(and (featurep 'mule) (mm-xemacs-find-mime-charset-1 ,begin ,end))))
(declare-function mm-delete-duplicates "mm-util" (list))
(defun mm-find-mime-charset-region (b e &optional hack-charsets)
"Return the MIME charsets needed to encode the region between B and E.
nil means ASCII, a single-element list represents an appropriate MIME
charset, and a longer list means no appropriate charset."
(let (charsets)
;; The return possibilities of this function are a mess...
(or (and (mm-multibyte-p)
mm-use-find-coding-systems-region
;; Find the mime-charset of the most preferred coding
;; system that has one.
(let ((systems (find-coding-systems-region b e)))
(when mm-coding-system-priorities
(setq systems
(sort systems 'mm-sort-coding-systems-predicate)))
(setq systems (delq 'compound-text systems))
(unless (equal systems '(undecided))
(while systems
(let* ((head (pop systems))
(cs (or (coding-system-get head :mime-charset)
(coding-system-get head 'mime-charset))))
;; The mime-charset (`x-ctext') of
;; `compound-text' is not in the IANA list. We
;; shouldn't normally use anything here with a
;; mime-charset having an `x-' prefix.
;; Fixme: Allow this to be overridden, since
;; there is existing use of x-ctext.
;; Also people apparently need the coding system
;; `iso-2022-jp-3' (which Mule-UCS defines with
;; mime-charset, though it's not valid).
(if (and cs
(not (string-match "^[Xx]-" (symbol-name cs)))
;; UTF-16 of any variety is invalid for
;; text parts and, unfortunately, has
;; mime-charset defined both in Mule-UCS
;; and versions of Emacs. (The name
;; might be `mule-utf-16...' or
;; `utf-16...'.)
(not (string-match "utf-16" (symbol-name cs))))
(setq systems nil
charsets (list cs))))))
charsets))
;; If we're XEmacs, and some coding system is appropriate,
;; mm-xemacs-find-mime-charset will return an appropriate list.
;; Otherwise, we'll get nil, and the next setq will get invoked.
(setq charsets (mm-xemacs-find-mime-charset b e))
;; Fixme: won't work for unibyte Emacs 23:
;; We're not multibyte, or a single coding system won't cover it.
(setq charsets
(mm-delete-duplicates
(mapcar 'mm-mime-charset
(delq 'ascii
(mm-find-charset-region b e))))))
(if (and (> (length charsets) 1)
(memq 'iso-8859-15 charsets)
(memq 'iso-8859-15 hack-charsets)
(save-excursion (mm-iso-8859-x-to-15-region b e)))
(dolist (x mm-iso-8859-15-compatible)
(setq charsets (delq (car x) charsets))))
(if (and (memq 'iso-2022-jp-2 charsets)
(memq 'iso-2022-jp-2 hack-charsets))
(setq charsets (delq 'iso-2022-jp charsets)))
;; Attempt to reduce the number of charsets if utf-8 is available.
(if (and (featurep 'xemacs)
(> (length charsets) 1)
(mm-coding-system-p 'utf-8))
(let ((mm-coding-system-priorities
(cons 'utf-8 mm-coding-system-priorities)))
(setq charsets
(mm-delete-duplicates
(mapcar 'mm-mime-charset
(delq 'ascii
(mm-find-charset-region b e)))))))
charsets))
(defmacro mm-with-unibyte-buffer (&rest forms)
"Create a temporary buffer, and evaluate FORMS there like `progn'.
Use unibyte mode for this."
`(with-temp-buffer
(mm-disable-multibyte)
,@forms))
(put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
(put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
(defmacro mm-with-multibyte-buffer (&rest forms)
"Create a temporary buffer, and evaluate FORMS there like `progn'.
Use multibyte mode for this."
`(with-temp-buffer
(mm-enable-multibyte)
,@forms))
(put 'mm-with-multibyte-buffer 'lisp-indent-function 0)
(put 'mm-with-multibyte-buffer 'edebug-form-spec '(body))
(defmacro mm-with-unibyte-current-buffer (&rest forms)
"Evaluate FORMS with current buffer temporarily made unibyte.
Also bind the default-value of `enable-multibyte-characters' to nil.
Equivalent to `progn' in XEmacs
NOTE: Use this macro with caution in multibyte buffers (it is not
worth using this macro in unibyte buffers of course). Use of
`(set-buffer-multibyte t)', which is run finally, is generally
harmful since it is likely to modify existing data in the buffer.
For instance, it converts \"\\300\\255\" into \"\\255\" in
Emacs 23 (unicode)."
(let ((multibyte (make-symbol "multibyte"))
(buffer (make-symbol "buffer")))
`(if mm-emacs-mule
(let ((,multibyte enable-multibyte-characters)
(,buffer (current-buffer)))
(unwind-protect
(letf (((default-value 'enable-multibyte-characters) nil))
(set-buffer-multibyte nil)
,@forms)
(set-buffer ,buffer)
(set-buffer-multibyte ,multibyte)))
(letf (((default-value 'enable-multibyte-characters) nil))
,@forms))))
(put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
(put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
(defun mm-find-charset-region (b e)
"Return a list of Emacs charsets in the region B to E."
(cond
((and (mm-multibyte-p)
(fboundp 'find-charset-region))
;; Remove composition since the base charsets have been included.
;; Remove eight-bit-*, treat them as ascii.
(let ((css (find-charset-region b e)))
(dolist (cs
'(composition eight-bit-control eight-bit-graphic control-1)
css)
(setq css (delq cs css)))))
(t
;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
(save-excursion
(save-restriction
(narrow-to-region b e)
(goto-char (point-min))
(skip-chars-forward "\0-\177")
(if (eobp)
'(ascii)
(let (charset)
(setq charset
(and (boundp 'current-language-environment)
(car (last (assq 'charset
(assoc current-language-environment
language-info-alist))))))
(if (eq charset 'ascii) (setq charset nil))
(or charset
(setq charset
(car (last (assq mail-parse-charset
mm-mime-mule-charset-alist)))))
(list 'ascii (or charset 'latin-iso8859-1)))))))))
(defun mm-auto-mode-alist ()
"Return an `auto-mode-alist' with only the .gz (etc) thingies."
(let ((alist auto-mode-alist)
out)
(while alist
(when (listp (cdar alist))
(push (car alist) out))
(pop alist))
(nreverse out)))
(defvar mm-inhibit-file-name-handlers
'(jka-compr-handler image-file-handler epa-file-handler)
"A list of handlers doing (un)compression (etc) thingies.")
(defun mm-insert-file-contents (filename &optional visit beg end replace
inhibit)
"Like `insert-file-contents', but only reads in the file.
A buffer may be modified in several ways after reading into the buffer due
to advanced Emacs features, such as file-name-handlers, format decoding,
`find-file-hooks', etc.
If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'.
This function ensures that none of these modifications will take place."
(letf* ((format-alist nil)
(auto-mode-alist (if inhibit nil (mm-auto-mode-alist)))
((default-value 'major-mode) 'fundamental-mode)
(enable-local-variables nil)
(after-insert-file-functions nil)
(enable-local-eval nil)
(inhibit-file-name-operation (if inhibit
'insert-file-contents
inhibit-file-name-operation))
(inhibit-file-name-handlers
(if inhibit
(append mm-inhibit-file-name-handlers
inhibit-file-name-handlers)
inhibit-file-name-handlers))
(ffh (if (boundp 'find-file-hook)
'find-file-hook
'find-file-hooks))
(val (symbol-value ffh)))
(set ffh nil)
(unwind-protect
(insert-file-contents filename visit beg end replace)
(set ffh val))))
(defun mm-append-to-file (start end filename &optional codesys inhibit)
"Append the contents of the region to the end of file FILENAME.
When called from a function, expects three arguments,
START, END and FILENAME. START and END are buffer positions
saying what text to write.
Optional fourth argument specifies the coding system to use when
encoding the file.
If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'."
(let ((coding-system-for-write
(or codesys mm-text-coding-system-for-write
mm-text-coding-system))
(inhibit-file-name-operation (if inhibit
'append-to-file
inhibit-file-name-operation))
(inhibit-file-name-handlers
(if inhibit
(append mm-inhibit-file-name-handlers
inhibit-file-name-handlers)
inhibit-file-name-handlers)))
(write-region start end filename t 'no-message)
(message "Appended to %s" filename)))
(defun mm-write-region (start end filename &optional append visit lockname
coding-system inhibit)
"Like `write-region'.
If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'."
(let ((coding-system-for-write
(or coding-system mm-text-coding-system-for-write
mm-text-coding-system))
(inhibit-file-name-operation (if inhibit
'write-region
inhibit-file-name-operation))
(inhibit-file-name-handlers
(if inhibit
(append mm-inhibit-file-name-handlers
inhibit-file-name-handlers)
inhibit-file-name-handlers)))
(write-region start end filename append visit lockname)))
(autoload 'gmm-write-region "gmm-utils")
;; It is not a MIME function, but some MIME functions use it.
(if (and (fboundp 'make-temp-file)
(ignore-errors
(let ((def (symbol-function 'make-temp-file)))
(and (byte-code-function-p def)
(setq def (if (fboundp 'compiled-function-arglist)
;; XEmacs
(eval (list 'compiled-function-arglist def))
(aref def 0)))
(>= (length def) 4)
(eq (nth 3 def) 'suffix)))))
(defalias 'mm-make-temp-file 'make-temp-file)
;; Stolen (and modified for XEmacs) from Emacs 22.
(defun mm-make-temp-file (prefix &optional dir-flag suffix)
"Create a temporary file.
The returned file name (created by appending some random characters at the end
of PREFIX, and expanding against `temporary-file-directory' if necessary),
is guaranteed to point to a newly created empty file.
You can then use `write-region' to write new data into the file.
If DIR-FLAG is non-nil, create a new empty directory instead of a file.
If SUFFIX is non-nil, add that at the end of the file name."
(let ((umask (default-file-modes))
file)
(unwind-protect
(progn
;; Create temp files with strict access rights. It's easy to
;; loosen them later, whereas it's impossible to close the
;; time-window of loose permissions otherwise.
(set-default-file-modes 448)
(while (condition-case err
(progn
(setq file
(make-temp-name
(expand-file-name
prefix
(if (fboundp 'temp-directory)
;; XEmacs
(temp-directory)
temporary-file-directory))))
(if suffix
(setq file (concat file suffix)))
(if dir-flag
(make-directory file)
;; NOTE: This is unsafe if Emacs 20
;; users and XEmacs users don't use
;; a secure temp directory.
(gmm-write-region "" nil file nil 'silent
nil 'excl))
nil)
(file-already-exists t)
;; The XEmacs version of `make-directory' issues
;; `file-error'.
(file-error (or (and (featurep 'xemacs)
(file-exists-p file))
(signal (car err) (cdr err)))))
;; the file was somehow created by someone else between
;; `make-temp-name' and `write-region', let's try again.
nil)
file)
;; Reset the umask.
(set-default-file-modes umask)))))
(defun mm-image-load-path (&optional package)
(let (dir result)
(dolist (path load-path (nreverse result))
(when (and path
(file-directory-p
(setq dir (concat (file-name-directory
(directory-file-name path))
"etc/images/" (or package "gnus/")))))
(push dir result))
(push path result))))
;; Fixme: This doesn't look useful where it's used.
(if (fboundp 'detect-coding-region)
(defun mm-detect-coding-region (start end)
"Like `detect-coding-region' except returning the best one."
(let ((coding-systems
(detect-coding-region start end)))
(or (car-safe coding-systems)
coding-systems)))
(defun mm-detect-coding-region (start end)
(let ((point (point)))
(goto-char start)
(skip-chars-forward "\0-\177" end)
(prog1
(if (eq (point) end) 'ascii (mm-guess-charset))
(goto-char point)))))
(declare-function mm-detect-coding-region "mm-util" (start end))
(if (fboundp 'coding-system-get)
(defun mm-detect-mime-charset-region (start end)
"Detect MIME charset of the text in the region between START and END."
(let ((cs (mm-detect-coding-region start end)))
(or (coding-system-get cs :mime-charset)
(coding-system-get cs 'mime-charset))))
(defun mm-detect-mime-charset-region (start end)
"Detect MIME charset of the text in the region between START and END."
(let ((cs (mm-detect-coding-region start end)))
cs)))
(eval-when-compile
(unless (fboundp 'coding-system-to-mime-charset)
(defalias 'coding-system-to-mime-charset 'ignore)))
(defun mm-coding-system-to-mime-charset (coding-system)
"Return the MIME charset corresponding to CODING-SYSTEM.
To make this function work with XEmacs, the APEL package is required."
(when coding-system
(or (and (fboundp 'coding-system-get)
(or (coding-system-get coding-system :mime-charset)
(coding-system-get coding-system 'mime-charset)))
(and (featurep 'xemacs)
(or (and (fboundp 'coding-system-to-mime-charset)
(not (eq (symbol-function 'coding-system-to-mime-charset)
'ignore)))
(and (condition-case nil
(require 'mcharset)
(error nil))
(fboundp 'coding-system-to-mime-charset)))
(coding-system-to-mime-charset coding-system)))))
(eval-when-compile
(require 'jka-compr))
(defun mm-decompress-buffer (filename &optional inplace force)
"Decompress buffer's contents, depending on jka-compr.
Only when FORCE is t or `auto-compression-mode' is enabled and FILENAME
agrees with `jka-compr-compression-info-list', decompression is done.
Signal an error if FORCE is neither nil nor t and compressed data are
not decompressed because `auto-compression-mode' is disabled.
If INPLACE is nil, return decompressed data or nil without modifying
the buffer. Otherwise, replace the buffer's contents with the
decompressed data. The buffer's multibyteness must be turned off."
(when (and filename
(if force
(prog1 t (require 'jka-compr))
(and (fboundp 'jka-compr-installed-p)
(jka-compr-installed-p))))
(let ((info (jka-compr-get-compression-info filename)))
(when info
(unless (or (memq force (list nil t))
(jka-compr-installed-p))
(error ""))
(let ((prog (jka-compr-info-uncompress-program info))
(args (jka-compr-info-uncompress-args info))
(msg (format "%s %s..."
(jka-compr-info-uncompress-message info)
filename))
(err-file (jka-compr-make-temp-name))
(cur (current-buffer))
(coding-system-for-read mm-binary-coding-system)
(coding-system-for-write mm-binary-coding-system)
retval err-msg)
(message "%s" msg)
(mm-with-unibyte-buffer
(insert-buffer-substring cur)
(condition-case err
(progn
(unless (memq (apply 'call-process-region
(point-min) (point-max)
prog t (list t err-file) nil args)
jka-compr-acceptable-retval-list)
(erase-buffer)
(insert (mapconcat
'identity
(delete "" (split-string
(prog2
(insert-file-contents err-file)
(buffer-string)
(erase-buffer))))
" ")
"\n")
(setq err-msg
(format "Error while executing \"%s %s < %s\""
prog (mapconcat 'identity args " ")
filename)))
(setq retval (buffer-string)))
(error
(setq err-msg (error-message-string err)))))
(when (file-exists-p err-file)
(ignore-errors (jka-compr-delete-temp-file err-file)))
(when inplace
(unless err-msg
(delete-region (point-min) (point-max))
(insert retval))
(setq retval nil))
(message "%s" (or err-msg (concat msg "done")))
retval)))))
(eval-when-compile
(unless (fboundp 'coding-system-name)
(defalias 'coding-system-name 'ignore))
(unless (fboundp 'find-file-coding-system-for-read-from-filename)
(defalias 'find-file-coding-system-for-read-from-filename 'ignore))
(unless (fboundp 'find-operation-coding-system)
(defalias 'find-operation-coding-system 'ignore)))
(defun mm-find-buffer-file-coding-system (&optional filename)
"Find coding system used to decode the contents of the current buffer.
This function looks for the coding system magic cookie or examines the
coding system specified by `file-coding-system-alist' being associated
with FILENAME which defaults to `buffer-file-name'. Data compressed by
gzip, bzip2, etc. are allowed."
(unless filename
(setq filename buffer-file-name))
(save-excursion
(let ((decomp (unless ;; No worth to examine charset of tar files.
(and filename
(string-match
"\\.\\(?:tar\\.[^.]+\\|tbz\\|tgz\\)\\'"
filename))
(mm-decompress-buffer filename nil t))))
(when decomp
(set-buffer (letf (((default-value 'enable-multibyte-characters) nil))
(generate-new-buffer " *temp*")))
(insert decomp)
(setq filename (file-name-sans-extension filename)))
(goto-char (point-min))
(prog1
(cond
((boundp 'set-auto-coding-function) ;; Emacs
(if filename
(or (funcall (symbol-value 'set-auto-coding-function)
filename (- (point-max) (point-min)))
(car (find-operation-coding-system 'insert-file-contents
filename)))
(let (auto-coding-alist)
(condition-case nil
(funcall (symbol-value 'set-auto-coding-function)
nil (- (point-max) (point-min)))
(error nil)))))
((and (featurep 'xemacs) (featurep 'file-coding)) ;; XEmacs
(let ((case-fold-search t)
(end (point-at-eol))
codesys start)
(or
(and (re-search-forward "-\\*-+[\t ]*" end t)
(progn
(setq start (match-end 0))
(re-search-forward "[\t ]*-+\\*-" end t))
(progn
(setq end (match-beginning 0))
(goto-char start)
(or (looking-at "coding:[\t ]*\\([^\t ;]+\\)")
(re-search-forward
"[\t ;]+coding:[\t ]*\\([^\t ;]+\\)"
end t)))
(find-coding-system (setq codesys
(intern (match-string 1))))
codesys)
(and (re-search-forward "^[\t ]*;+[\t ]*Local[\t ]+Variables:"
nil t)
(progn
(setq start (match-end 0))
(re-search-forward "^[\t ]*;+[\t ]*End:" nil t))
(progn
(setq end (match-beginning 0))
(goto-char start)
(re-search-forward
"^[\t ]*;+[\t ]*coding:[\t ]*\\([^\t\n\r ]+\\)"
end t))
(find-coding-system (setq codesys
(intern (match-string 1))))
codesys)
(and (progn
(goto-char (point-min))
(setq case-fold-search nil)
(re-search-forward "^;;;coding system: "
;;(+ (point-min) 3000) t))
nil t))
(looking-at "[^\t\n\r ]+")
(find-coding-system
(setq codesys (intern (match-string 0))))
codesys)
(and filename
(setq codesys
(find-file-coding-system-for-read-from-filename
filename))
(coding-system-name (coding-system-base codesys)))))))
(when decomp
(kill-buffer (current-buffer)))))))
(provide 'mm-util)
;; arch-tag: 94dc5388-825d-4fd1-bfa5-2100aa351238
;;; mm-util.el ends here
|