all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob 69c57e0afdc8b152153427730179c66ba090a38d 76005 bytes (raw)
name: lisp/mh-e/mh-mime.el 	 # note: path name is non-authoritative(*)

   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
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
 
;;; mh-mime.el --- MH-E MIME support

;; Copyright (C) 1993, 1995, 2001-2017 Free Software Foundation, Inc.

;; Author: Bill Wohler <wohler@newt.com>
;; Maintainer: Bill Wohler <wohler@newt.com>
;; Keywords: mail
;; See: mh-e.el

;; 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 <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Message composition of MIME message is done with either MH-style
;; directives for mhn or mhbuild (MH 6.8 or later) or MML (MIME Meta
;; Language) tags.

;; TODO:
;;   Paragraph code should not fill # lines if MIME enabled.
;;   Implement mh-auto-mh-to-mime (if non-nil, \\[mh-send-letter]
;;      invokes mh-mh-to-mime automatically before sending.)
;;      Actually, instead of mh-auto-mh-to-mime,
;;      should read automhnproc from profile.
;;   MIME option to mh-forward command to move to content-description
;;   insertion point.

;;; Change Log:

;;; Code:

(require 'mh-e)
(require 'mh-gnus)                      ;needed because mh-gnus.el not compiled

(require 'font-lock)
(require 'gnus-util)
(require 'mailcap)
(require 'mm-decode)
(require 'mm-view)
(require 'mml)

(autoload 'article-emphasize "gnus-art")
(autoload 'gnus-eval-format "gnus-spec")
(autoload 'mail-content-type-get "mail-parse")
(autoload 'mail-decode-encoded-word-string "mail-parse")
(autoload 'mail-header-parse-content-type "mail-parse")
(autoload 'mail-header-strip-cte "mail-parse")
(autoload 'mail-strip-quoted-names "mail-utils")
(autoload 'message-options-get "message")
(autoload 'message-options-set "message")
(autoload 'message-options-set-recipient "message")
(autoload 'mm-decode-body "mm-bodies")
(autoload 'mm-uu-dissect "mm-uu")
(autoload 'mml-unsecure-message "mml-sec")
(autoload 'rfc2047-decode-region "rfc2047")
(autoload 'widget-convert-button "wid-edit")

\f

;;; Variables

;; This has to be a macro, since we do: (setf (mh-buffer-data) ...)
;;;###mh-autoload
(defmacro mh-buffer-data ()
  "Convenience macro to get the MIME data structures of the current buffer."
  `(gethash (current-buffer) mh-globals-hash))

;; Structure to keep track of MIME handles on a per buffer basis.
(mh-defstruct (mh-buffer-data (:conc-name mh-mime-)
                              (:constructor mh-make-buffer-data))
  (handles ())                          ; List of MIME handles
  (handles-cache (make-hash-table))     ; Cache to avoid multiple decodes of
                                        ; nested messages
  (parts-count 0)                       ; The button number is generated from
                                        ; this number
  (part-index-hash (make-hash-table)))  ; Avoid incrementing the part number
                                        ; for nested messages

(defvar mh-mm-inline-media-tests
  `(("image/jpeg"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'jpeg handle)))
    ("image/png"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'png handle)))
    ("image/gif"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'gif handle)))
    ("image/tiff"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'tiff handle)) )
    ("image/xbm"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'xbm handle)))
    ("image/x-xbitmap"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'xbm handle)))
    ("image/xpm"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'xpm handle)))
    ("image/x-pixmap"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'xpm handle)))
    ("image/bmp"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'bmp handle)))
    ("image/x-portable-bitmap"
     mm-inline-image
     (lambda (handle)
       (mm-valid-and-fit-image-p 'pbm handle)))
    ("text/plain" mm-inline-text identity)
    ("text/enriched" mm-inline-text identity)
    ("text/richtext" mm-inline-text identity)
    ("text/x-patch" mm-display-patch-inline
     (lambda (handle)
       (locate-library "diff-mode")))
    ("application/emacs-lisp" mm-display-elisp-inline identity)
    ("application/x-emacs-lisp" mm-display-elisp-inline identity)
    ("text/html"
     ,(if (fboundp 'mm-inline-text-html) 'mm-inline-text-html 'mm-inline-text)
     (lambda (handle)
       (or (and (boundp 'mm-inline-text-html-renderer)
                mm-inline-text-html-renderer)
           (and (boundp 'mm-text-html-renderer) mm-text-html-renderer))))
    ("text/x-vcard"
     mh-mm-inline-text-vcard
     (lambda (handle)
       (or (featurep 'vcard)
           (locate-library "vcard"))))
    ("message/delivery-status" mm-inline-text identity)
    ("message/rfc822" mh-mm-inline-message identity)
    ;;("message/partial" mm-inline-partial identity)
    ;;("message/external-body" mm-inline-external-body identity)
    ("text/.*" mm-inline-text identity)
    ("audio/wav" mm-inline-audio
     (lambda (handle)
       (and (or (featurep 'nas-sound) (featurep 'native-sound))
            (device-sound-enabled-p))))
    ("audio/au"
     mm-inline-audio
     (lambda (handle)
       (and (or (featurep 'nas-sound) (featurep 'native-sound))
            (device-sound-enabled-p))))
    ("application/pgp-signature" ignore identity)
    ("application/x-pkcs7-signature" ignore identity)
    ("application/pkcs7-signature" ignore identity)
    ("application/x-pkcs7-mime" ignore identity)
    ("application/pkcs7-mime" ignore identity)
    ("multipart/alternative" ignore identity)
    ("multipart/mixed" ignore identity)
    ("multipart/related" ignore identity)
    ;; Disable audio and image
    ("audio/.*" ignore ignore)
    ("image/.*" ignore ignore)
    ;; Default to displaying as text
    (".*" mm-inline-text mh-mm-readable-p))
  "Alist of media types/tests saying whether types can be displayed inline.")

(defvar mh-mime-save-parts-directory nil
  "Default to use for `mh-mime-save-parts-default-directory'.
Set from last use.")

;; Copied from gnus-art.el (should be checked for other cool things that can
;; be added to the buttons)
(defvar mh-mime-button-commands
  '((mh-press-button "\r" "Toggle Display")))
(defvar mh-mime-button-map
  (let ((map (make-sparse-keymap)))
    (unless (>= (string-to-number emacs-version) 21)
      ;; XEmacs doesn't care.
      (set-keymap-parent map mh-show-mode-map))
    (mh-do-in-gnu-emacs
     (define-key map [mouse-2] 'mh-push-button))
    (mh-do-in-xemacs
     (define-key map '(button2) 'mh-push-button))
    (dolist (c mh-mime-button-commands)
      (define-key map (cadr c) (car c)))
    map))
(defvar mh-mime-button-line-format-alist
  '((?T long-type ?s)
    (?d description ?s)
    (?p index ?s)
    (?e dots ?s)))
(defvar mh-mime-button-line-format "%{%([%p. %d%T]%)%}%e\n")
(defvar mh-mime-security-button-pressed nil)
(defvar mh-mime-security-button-line-format "%{%([[%t:%i]%D]%)%}\n")
(defvar mh-mime-security-button-end-line-format "%{%([[End of %t]%D]%)%}\n")
(defvar mh-mime-security-button-line-format-alist
  '((?t type ?s)
    (?i info ?s)
    (?d details ?s)
    (?D pressed-details ?s)))
(defvar mh-mime-security-button-map
  (let ((map (make-sparse-keymap)))
    (unless (>= (string-to-number emacs-version) 21)
      (set-keymap-parent map mh-show-mode-map))
    (define-key map "\r" 'mh-press-button)
    (mh-do-in-gnu-emacs
     (define-key map [mouse-2] 'mh-push-button))
    (mh-do-in-xemacs
     (define-key map '(button2) 'mh-push-button))
    map))

\f

;;; MH-Folder Commands

;; Alphabetical.

;;;###mh-autoload
(defun mh-display-with-external-viewer (part-index)
  "View attachment externally.

If Emacs does not know how to view an attachment, you could save
it into a file and then run some program to open it. It is
easier, however, to launch the program directly from MH-E with
this command. While you'll most likely use this to view
spreadsheets and documents, it is also useful to use your browser
to view HTML attachments with higher fidelity than what Emacs can
provide.

This command displays the attachment associated with the button
under the cursor. If the cursor is not located over a button,
then the cursor first moves to the next button, wrapping to the
beginning of the message if necessary. You can provide a numeric
prefix argument PART-INDEX to view the attachment labeled with
that number.

This command tries to provide a reasonable default for the viewer
by calling the Emacs function `mailcap-mime-info'. This function
usually reads the file \"/etc/mailcap\"."
  (interactive "P")
  (when (consp part-index) (setq part-index (car part-index)))
  (mh-folder-mime-action
   part-index
   #'(lambda ()
       (let* ((part (get-text-property (point) 'mh-data))
              (type (mm-handle-media-type part))
              (methods (mapcar (lambda (x) (list (cdr (assoc 'viewer x))))
                               (mailcap-mime-info type 'all)))
              (def (caar methods))
              (prompt (format "Viewer%s: " (if def
                                               (format " (default %s)" def)
                                             "")))
              (method (completing-read prompt methods nil nil nil nil def))
              (folder mh-show-folder-buffer)
              (buffer-read-only nil))
         (when (string-match "^[^% \t]+$" method)
           (setq method (concat method " %s")))
         (mh-flet
          ((mm-handle-set-external-undisplayer
            (handle function)
            (mh-handle-set-external-undisplayer folder handle function)))
          (unwind-protect (mm-display-external part method)
            (set-buffer-modified-p nil)))))
   nil))

;;;###mh-autoload
(defun mh-folder-inline-mime-part (part-index)
  "Show attachment verbatim.

You can view the raw contents of an attachment with this command.
This command displays (or hides) the contents of the attachment
associated with the button under the cursor verbatim. If the
cursor is not located over a button, then the cursor first moves
to the next button, wrapping to the beginning of the message if
necessary.

You can also provide a numeric prefix argument PART-INDEX to view
the attachment labeled with that number."
  (interactive "P")
  (when (consp part-index) (setq part-index (car part-index)))
  (mh-folder-mime-action part-index #'mh-mime-inline-part nil))

(defun mh-mime-inline-part ()
  "Toggle display of the raw MIME part."
  (interactive)
  (let* ((buffer-read-only nil)
         (data (get-text-property (point) 'mh-data))
         (inserted-flag (get-text-property (point) 'mh-mime-inserted))
         (displayed-flag (mm-handle-displayed-p data))
         (point (point))
         start end)
    (cond ((and data (not inserted-flag) (not displayed-flag))
           (let ((contents (mm-get-part data)))
             (add-text-properties (mh-line-beginning-position)
                                  (mh-line-end-position) '(mh-mime-inserted t))
             (setq start (point-marker))
             (forward-line 1)
             (mm-insert-inline data contents)
             (setq end (point-marker))
             (add-text-properties
              start (progn (goto-char start) (mh-line-end-position))
              `(mh-region (,start . ,end)))))
          ((and data (or inserted-flag displayed-flag))
           (mh-press-button)
           (message "MIME part already inserted")))
    (goto-char point)
    (set-buffer-modified-p nil)))

;;;###mh-autoload
(defun mh-folder-save-mime-part (part-index)
  "Save (output) attachment.

This command saves the attachment associated with the button under the
cursor. If the cursor is not located over a button, then the cursor
first moves to the next button, wrapping to the beginning of the
message if necessary.

You can also provide a numeric prefix argument PART-INDEX to save the
attachment labeled with that number.

This command prompts you for a filename and suggests a specific name
if it is available."
  (interactive "P")
  (when (consp part-index) (setq part-index (car part-index)))
  (mh-folder-mime-action part-index #'mh-mime-save-part nil))

(defun mh-mime-save-part ()
  "Save MIME part at point."
  (interactive)
  (let ((data (get-text-property (point) 'mh-data)))
    (when data
      (let ((mm-default-directory
             (file-name-as-directory (or mh-mime-save-parts-directory
                                         default-directory))))
        (mh-mm-save-part data)
        (setq mh-mime-save-parts-directory mm-default-directory)))))

;;;###mh-autoload
(defun mh-folder-toggle-mime-part (part-index)
  "View attachment.

This command displays (or hides) the attachment associated with
the button under the cursor. If the cursor is not located over a
button, then the cursor first moves to the next button, wrapping
to the beginning of the message if necessary. This command has
the advantage over related commands of working from the MH-Folder
buffer.

You can also provide a numeric prefix argument PART-INDEX to view
the attachment labeled with that number. If Emacs does not know
how to display the attachment, then Emacs offers to save the
attachment in a file."
  (interactive "P")
  (when (consp part-index) (setq part-index (car part-index)))
  (mh-folder-mime-action part-index #'mh-press-button t))

;;;###mh-autoload
(defun mh-mime-save-parts (prompt)
  "Save attachments.

You can save all of the attachments at once with this command.
The attachments are saved in the directory specified by the
option `mh-mime-save-parts-default-directory' unless you use a
prefix argument PROMPT in which case you are prompted for the
directory. These directories may be superseded by MH profile
components, since this function calls on \"mhstore\" (\"mhn\") to
do the work."
  (interactive "P")
  (let ((msg (if (eq major-mode 'mh-show-mode)
                 (mh-show-buffer-message-number)
               (mh-get-msg-num t)))
        (folder (if (eq major-mode 'mh-show-mode)
                    mh-show-folder-buffer
                  mh-current-folder))
        (command (if (mh-variant-p 'nmh) "mhstore" "mhn"))
        (directory
         (cond
          ((and (or prompt
                    (equal nil mh-mime-save-parts-default-directory)
                    (equal t mh-mime-save-parts-default-directory))
                (not mh-mime-save-parts-directory))
           (read-directory-name "Store in directory: " nil nil t))
          ((and (or prompt
                    (equal t mh-mime-save-parts-default-directory))
                mh-mime-save-parts-directory)
           (read-directory-name (format
                            "Store in directory (default %s): "
                            mh-mime-save-parts-directory)
                           "" mh-mime-save-parts-directory t ""))
          ((stringp mh-mime-save-parts-default-directory)
           mh-mime-save-parts-default-directory)
          (t
           mh-mime-save-parts-directory))))
    (if (and (equal directory "") mh-mime-save-parts-directory)
        (setq directory mh-mime-save-parts-directory))
    (if (not (file-directory-p directory))
        (message "No directory specified")
      (if (equal nil mh-mime-save-parts-default-directory)
          (setq mh-mime-save-parts-directory directory))
      (with-current-buffer (get-buffer-create mh-log-buffer)
        (cd directory)
        (setq mh-mime-save-parts-directory directory)
        (let ((initial-size (mh-truncate-log-buffer)))
          (apply 'call-process
                 (expand-file-name command mh-progs) nil t nil
                 (mh-list-to-string (list folder msg "-auto"
                                          (if (not (mh-variant-p 'nmh))
                                              "-store"))))
          (if (> (buffer-size) initial-size)
              (save-window-excursion
                (switch-to-buffer-other-window mh-log-buffer)
                (sit-for 3))))))))

;;;###mh-autoload
(defun mh-toggle-mh-decode-mime-flag ()
  "Toggle the value of `mh-decode-mime-flag'."
  (interactive)
  (setq mh-decode-mime-flag (not mh-decode-mime-flag))
  (mh-show nil t)
  (message "%s" (if mh-decode-mime-flag
                    "Processing attachments normally"
                  "Displaying raw message")))

;;;###mh-autoload
(defun mh-toggle-mime-buttons ()
  "Toggle option `mh-display-buttons-for-inline-parts-flag'."
  (interactive)
  (setq mh-display-buttons-for-inline-parts-flag
        (not mh-display-buttons-for-inline-parts-flag))
  (mh-show nil t))

\f

;;; MIME Display Routines

(defun mh-mm-inline-message (handle)
  "Display message, HANDLE.
The function decodes the message and displays it. It avoids
decoding the same message multiple times."
  (let ((b (point))
        (clean-message-header mh-clean-message-header-flag)
        (invisible-headers mh-invisible-header-fields-compiled)
        (visible-headers nil))
    (save-excursion
      (save-restriction
        (narrow-to-region b b)
        (mm-insert-part handle)
        (mh-mime-display
         (or (gethash handle (mh-mime-handles-cache (mh-buffer-data)))
             (setf (gethash handle (mh-mime-handles-cache (mh-buffer-data)))
                   (let ((handles (mm-dissect-buffer nil)))
                     (if handles
                         (mh-mm-uu-dissect-text-parts handles)
                       (setq handles (mm-uu-dissect)))
                     (setf (mh-mime-handles (mh-buffer-data))
                           (mh-mm-merge-handles
                            handles (mh-mime-handles (mh-buffer-data))))
                     handles))))

        (goto-char (point-min))
        (mh-show-xface)
        (cond (clean-message-header
               (mh-clean-msg-header (point-min)
                                    invisible-headers
                                    visible-headers)
               (goto-char (point-min)))
              (t
               (mh-start-of-uncleaned-message)))
        (mh-decode-message-header)
        (mh-show-addr)
        ;; The other highlighting types don't need anything special
        (when (eq mh-highlight-citation-style 'gnus)
          (mh-gnus-article-highlight-citation))
        (goto-char (point-min))
        (insert "\n------- Forwarded Message\n\n")
        (mh-display-smileys)
        (mh-display-emphasis)
        (mm-handle-set-undisplayer
         handle
         `(lambda ()
            (let (buffer-read-only)
              (if (fboundp 'remove-specifier)
                  ;; This is only valid on XEmacs.
                  (mapcar (lambda (prop)
                            (remove-specifier
                             (face-property 'default prop) (current-buffer)))
                          '(background background-pixmap foreground)))
              (delete-region ,(point-min-marker) ,(point-max-marker)))))))))

;;;###mh-autoload
(defun mh-decode-message-header ()
  "Decode RFC2047 encoded message header fields."
  (when mh-decode-mime-flag
    (let ((buffer-read-only nil))
      (rfc2047-decode-region (point-min) (mh-mail-header-end)))))

;;;###mh-autoload
(defun mh-decode-message-subject ()
  "Decode RFC2047 encoded message header fields."
  (when mh-decode-mime-flag
    (save-excursion
      (let ((buffer-read-only nil))
        (rfc2047-decode-region (progn (mh-goto-header-field "Subject:") (point))
                               (progn (mh-header-field-end) (point)))))))

;;;###mh-autoload
(defun mh-mime-display (&optional pre-dissected-handles)
  "Display (and possibly decode) MIME handles.
Optional argument, PRE-DISSECTED-HANDLES is a list of MIME
handles. If present they are displayed otherwise the buffer is
parsed and then displayed."
  (let ((handles ())
        (folder mh-show-folder-buffer)
        (raw-message-data (buffer-string)))
    (mh-flet
     ((mm-handle-set-external-undisplayer
       (handle function)
       (mh-handle-set-external-undisplayer folder handle function)))
     (goto-char (point-min))
     (unless (search-forward "\n\n" nil t)
       (goto-char (point-max))
       (insert "\n\n"))

     (condition-case err
         (progn
           ;; If needed dissect the current buffer
           (if pre-dissected-handles
               (setq handles pre-dissected-handles)
             (if (setq handles (mm-dissect-buffer nil))
                 (mh-mm-uu-dissect-text-parts handles)
               (setq handles (mm-uu-dissect)))
             (setf (mh-mime-handles (mh-buffer-data))
                   (mh-mm-merge-handles handles
                                        (mh-mime-handles (mh-buffer-data))))
             (unless handles
               (mh-decode-message-body)))

           (cond ((and handles
                       (or (not (stringp (car handles)))
                           (cdr handles)))
                  ;; Go to start of message body
                  (goto-char (point-min))
                  (or (search-forward "\n\n" nil t)
                      (goto-char (point-max)))

                  ;; Delete the body
                  (delete-region (point) (point-max))

                  ;; Display the MIME handles
                  (mh-mime-display-part handles))
                 (t
                  (mh-signature-highlight))))
       (error
        (message "Could not display body: %s" (error-message-string err))
        (delete-region (point-min) (point-max))
        (insert raw-message-data))))))

(defun mh-decode-message-body ()
  "Decode message based on charset.
If message has been encoded for transfer take that into account."
  (let (ct charset cte)
    (goto-char (point-min))
    (re-search-forward "\n\n" nil t)
    (save-restriction
      (narrow-to-region (point-min) (point))
      (setq ct (ignore-errors (mail-header-parse-content-type
                               (message-fetch-field "Content-Type" t)))
            charset (mail-content-type-get ct 'charset)
            cte (message-fetch-field "Content-Transfer-Encoding")))
    (when (stringp cte) (setq cte (mail-header-strip-cte cte)))
    (when (or (not ct) (equal (car ct) "text/plain"))
      (save-restriction
        (narrow-to-region (min (1+ (mh-mail-header-end)) (point-max))
                          (point-max))
        (mm-decode-body charset
                        (and cte (intern (downcase cte)))
                        (car ct))))))

(defun mh-mime-display-part (handle)
  "Decides the viewer to call based on the type of HANDLE."
  (cond ((null handle)
         nil)
        ((not (stringp (car handle)))
         (mh-mime-display-single handle))
        ((equal (car handle) "multipart/alternative")
         (mh-mime-display-alternative (cdr handle)))
        ((and mh-pgp-support-flag
              (or (equal (car handle) "multipart/signed")
                  (equal (car handle) "multipart/encrypted")))
         (mh-mime-display-security handle))
        (t
         (mh-mime-display-mixed (cdr handle)))))

(defun mh-mime-display-mixed (handles)
  "Display the list of MIME parts, HANDLES recursively."
  (mapcar #'mh-mime-display-part handles))

(defun mh-mime-display-alternative (handles)
  "Choose among the alternatives, HANDLES the part that will be displayed.
If no part is preferred then all the parts are displayed."
  (let* ((preferred (mm-preferred-alternative handles))
         (others (loop for x in handles unless (eq x preferred) collect x)))
    (cond ((and preferred
                (stringp (car preferred)))
           (mh-mime-display-part preferred)
           (mh-mime-maybe-display-alternatives others))
          (preferred
           (save-restriction
             (narrow-to-region (point) (if (eobp) (point) (1+ (point))))
             (mh-mime-display-single preferred)
             (mh-mime-maybe-display-alternatives others)
             (goto-char (point-max))))
          (t
           (mh-mime-display-mixed handles)))))

(defun mh-mime-maybe-display-alternatives (alternatives)
  "Show buttons for ALTERNATIVES.
If `mh-mime-display-alternatives-flag' is non-nil then display
buttons for alternative parts that are usually suppressed."
  (when (and mh-display-buttons-for-alternatives-flag alternatives)
    (insert "\n----------------------------------------------------\n")
    (insert "Alternatives:\n")
    (dolist (x alternatives)
      (insert "\n")
      (mh-insert-mime-button x (mh-mime-part-index x) nil))
    (insert "\n----------------------------------------------------\n")))

(defun mh-mime-display-security (handle)
  "Display PGP encrypted/signed message, HANDLE."
  (save-restriction
    (narrow-to-region (point) (point))
    (insert "\n")
    (mh-insert-mime-security-button handle)
    (mh-mime-display-mixed (cdr handle))
    (insert "\n")
    (let ((mh-mime-security-button-line-format
           mh-mime-security-button-end-line-format))
      (mh-insert-mime-security-button handle))
    (mh-mm-set-handle-multipart-parameter
     handle 'mh-region (cons (point-min-marker) (point-max-marker)))))

(defun mh-mime-display-single (handle)
  "Display a leaf node, HANDLE in the MIME tree."
  (let* ((type (mm-handle-media-type handle))
         (small-image-flag (mh-small-image-p handle))
         (attachmentp (equal (car (mm-handle-disposition handle))
                             "attachment"))
         (inlinep (and (equal (car (mm-handle-disposition handle)) "inline")
                       (mm-automatic-display-p handle)
                       (mm-inlinable-p handle)
                       (mm-inlined-p handle)))
         (displayp (or inlinep                   ; show if inline OR
                       (mh-inline-vcard-p handle);      inline vcard OR
                       (and (not attachmentp)    ;      if not an attachment
                            (or small-image-flag ;        and small image
                                                 ;        and user wants inline
                                (and (not (equal
                                           (mm-handle-media-supertype handle)
                                           "image"))
                                     (mm-automatic-display-p handle)
                                     (mm-inlinable-p handle)
                                     (mm-inlined-p handle)))))))
    (save-restriction
      (narrow-to-region (point) (if (eobp) (point) (1+ (point))))
      (cond ((and mh-pgp-support-flag
                  (equal type "application/pgp-signature"))
             nil)             ; skip signatures as they are already handled...
            ((not displayp)
             (insert "\n")
             (mh-insert-mime-button handle (mh-mime-part-index handle) nil))
            ((and displayp
                  (not mh-display-buttons-for-inline-parts-flag))
             (or (mm-display-part handle)
                 (mm-display-part handle))
             (mh-signature-highlight handle))
            ((and displayp
                  mh-display-buttons-for-inline-parts-flag)
             (insert "\n")
             (mh-insert-mime-button handle (mh-mime-part-index handle) nil)
             (forward-line -1)
             (mh-mm-display-part handle)))
      (goto-char (point-max)))))

;; There is a bug in Gnus inline image display due to which an extra line
;; gets inserted every time it is viewed. To work around that problem we are
;; using an extra property 'mh-region to remember the region that is added
;; when the button is clicked. The region is then deleted to make sure that
;; no extra lines get inserted.
(defun mh-mm-display-part (handle)
  "Toggle display of button for MIME part, HANDLE."
  (beginning-of-line)
  (let ((id (get-text-property (point) 'mh-part))
        (point (point))
        (window (selected-window))
        (mail-parse-charset 'nil)
        (mail-parse-ignored-charsets nil)
        region buffer-read-only)
    (save-excursion
      (unwind-protect
          (let ((win (get-buffer-window (current-buffer) t)))
            (when win
              (select-window win))
            (goto-char point)

            (if (mm-handle-displayed-p handle)
                ;; This will remove the part.
                (progn
                  ;; Delete the button and displayed part (if any)
                  (let ((region (get-text-property point 'mh-region)))
                    (when region
                      (mh-funcall-if-exists
                       remove-images (car region) (cdr region)))
                    (mm-display-part handle)
                    (when region
                      (delete-region (car region) (cdr region))))
                  ;; Delete button (if it still remains). This happens for
                  ;; externally displayed parts where the previous step does
                  ;; nothing.
                  (unless (eolp)
                    (delete-region (point) (progn (forward-line) (point)))))
              (save-restriction
                (delete-region (point) (progn (forward-line 1) (point)))
                (narrow-to-region (point) (point))
                ;; Maybe we need another unwind-protect here.
                (when (equal (mm-handle-media-supertype handle) "image")
                  (insert "\n"))
                (when (and (not (eq (ignore-errors (mm-display-part handle))
                                    'inline))
                           (equal (mm-handle-media-supertype handle)
                                  "image"))
                  (goto-char (point-min))
                  (delete-char 1))
                (when (equal (mm-handle-media-supertype handle) "text")
                  (when (eq mh-highlight-citation-style 'gnus)
                    (mh-gnus-article-highlight-citation))
                  (mh-display-smileys)
                  (mh-display-emphasis)
                  (mh-signature-highlight handle))
                (setq region (cons (progn (goto-char (point-min))
                                          (point-marker))
                                   (progn (goto-char (point-max))
                                          (point-marker)))))))
        (when (window-live-p window)
          (select-window window))
        (goto-char point)
        (beginning-of-line)
        (mh-insert-mime-button handle id (mm-handle-displayed-p handle))
        (goto-char point)
        (when region
          (add-text-properties (mh-line-beginning-position)
                               (mh-line-end-position)
                               `(mh-region ,region)))))))

(defun mh-mime-part-index (handle)
  "Generate the button number for MIME part, HANDLE.
Notice that a hash table is used to display the same number when
buttons need to be displayed multiple times (for instance when
nested messages are opened)."
  (or (gethash handle (mh-mime-part-index-hash (mh-buffer-data)))
      (setf (gethash handle (mh-mime-part-index-hash (mh-buffer-data)))
            (incf (mh-mime-parts-count (mh-buffer-data))))))

(defun mh-small-image-p (handle)
  "Decide whether HANDLE is a \"small\" image that can be displayed inline.
This is only useful if a Content-Disposition header is not present."
  (let ((media-test (caddr (assoc (car (mm-handle-type handle))
                                  mh-mm-inline-media-tests)))
        (mm-inline-large-images t))
    (and media-test
         (equal (mm-handle-media-supertype handle) "image")
         (funcall media-test handle) ; Since mm-inline-large-images is T,
                                        ; this only tells us if the image is
                                        ; something that emacs can display
         (let* ((image (mm-get-image handle)))
           (or (mh-do-in-xemacs
                 (and (mh-funcall-if-exists glyphp image)
                      (< (glyph-width image)
                         (or mh-max-inline-image-width (window-pixel-width)))
                      (< (glyph-height image)
                         (or mh-max-inline-image-height
                             (window-pixel-height)))))
               (mh-do-in-gnu-emacs
                 (let ((size (mh-funcall-if-exists image-size image)))
                   (and size
                        (< (cdr size) (or mh-max-inline-image-height
                                          (1- (window-height))))
                        (< (car size) (or mh-max-inline-image-width
                                          (window-width)))))))))))

(defun mh-inline-vcard-p (handle)
  "Decide if HANDLE is a vcard that must be displayed inline."
  (let ((type (mm-handle-type handle)))
    (and (or (featurep 'vcard) (fboundp 'vcard-pretty-print))
         (consp type)
         (equal (car type) "text/x-vcard")
         (save-excursion
           (save-restriction
             (widen)
             (goto-char (point-min))
             (not (mh-signature-separator-p)))))))

(defun mh-signature-highlight (&optional handle)
  "Highlight message signature in HANDLE.
The optional argument, HANDLE is a MIME handle if the function is
being used to highlight the signature in a MIME part."
  (let ((regexp
         (cond ((not handle) "^-- $")
               ((not (and (equal (mm-handle-media-supertype handle) "text")
                          (equal (mm-handle-media-subtype handle) "html")))
                "^-- $")
               ((eq (mh-mm-text-html-renderer) 'lynx) "^   --$")
               (t "^--$"))))
    (save-excursion
      (goto-char (point-max))
      (when (re-search-backward regexp nil t)
        (mh-do-in-gnu-emacs
          (let ((ov (make-overlay (point) (point-max))))
            (overlay-put ov 'face 'mh-show-signature)
            (overlay-put ov 'evaporate t)))
        (mh-do-in-xemacs
          (set-extent-property (make-extent (point) (point-max))
                               'face 'mh-show-signature))))))

\f

;;; Button Display

;; Shush compiler.
(mh-do-in-xemacs
  (defvar dots)
  (defvar type)
  (defvar ov))

(defun mh-insert-mime-button (handle index displayed)
  "Insert MIME button for HANDLE.
INDEX is the part number that will be DISPLAYED. It is also used
by commands like \"K v\" which operate on individual MIME parts."
  ;; The button could be displayed by a previous decode. In that case
  ;; undisplay it if we need a hidden button.
  (when (and (mm-handle-displayed-p handle) (not displayed))
    (mm-display-part handle))
  (let ((name (or (mail-content-type-get (mm-handle-type handle) 'name)
                  (mail-content-type-get (mm-handle-disposition handle)
                                         'filename)
                  (mail-content-type-get (mm-handle-type handle) 'url)
                  ""))
        (type (mm-handle-media-type handle))
        (description (mail-decode-encoded-word-string
                      (or (mm-handle-description handle) "")))
        (dots (if (or displayed (mm-handle-displayed-p handle)) "   " "..."))
        long-type begin end)
    (if (string-match ".*/" name) (setq name (substring name (match-end 0))))
    (setq long-type (concat type (and (not (equal name ""))
                                      (concat "; " name))))
    (unless (equal description "")
      (setq long-type (concat " --- " long-type)))
    (unless (bolp) (insert "\n"))
    (setq begin (point))
    (gnus-eval-format
     mh-mime-button-line-format mh-mime-button-line-format-alist
     `(,@(mh-gnus-local-map-property mh-mime-button-map)
         mh-callback mh-mm-display-part
         mh-part ,index
         mh-data ,handle))
    (setq end (point))
    (widget-convert-button
     'link begin end
     :mime-handle handle
     :action 'mh-widget-press-button
     :button-keymap mh-mime-button-map
     :help-echo
     "Mouse-2 click or press RET (in show buffer) to toggle display")
    (dolist (ov (mh-funcall-if-exists overlays-in begin end))
      (mh-funcall-if-exists overlay-put ov 'evaporate t))))

;; Shush compiler.
(defvar mm-verify-function-alist)       ; < Emacs 22
(defvar mm-decrypt-function-alist)      ; < Emacs 22
(mh-do-in-xemacs
  (defvar pressed-details))

(defun mh-insert-mime-security-button (handle)
  "Display buttons for PGP message, HANDLE."
  (let* ((protocol (mh-mm-handle-multipart-ctl-parameter handle 'protocol))
         (crypto-type (or (nth 2 (assoc protocol mm-verify-function-alist))
                          (nth 2 (assoc protocol mm-decrypt-function-alist))
                          "Unknown"))
         (type (concat crypto-type
                       (if (equal (car handle) "multipart/signed")
                           " Signed" " Encrypted")
                       " Part"))
         (info (or (mh-mm-handle-multipart-ctl-parameter handle 'gnus-info)
                   "Undecided"))
         (details (mh-mm-handle-multipart-ctl-parameter handle 'gnus-details))
         pressed-details begin end face)
    (setq details (if details (concat "\n" details) ""))
    (setq pressed-details (if mh-mime-security-button-pressed details ""))
    (setq face (mh-mime-security-button-face info))
    (unless (bolp) (insert "\n"))
    (setq begin (point))
    (gnus-eval-format
     mh-mime-security-button-line-format
     mh-mime-security-button-line-format-alist
     `(,@(mh-gnus-local-map-property mh-mime-security-button-map)
         mh-button-pressed ,mh-mime-security-button-pressed
         mh-callback mh-mime-security-press-button
         mh-line-format ,mh-mime-security-button-line-format
         mh-data ,handle))
    (setq end (point))
    (widget-convert-button 'link begin end
                           :mime-handle handle
                           :action 'mh-widget-press-button
                           :button-keymap mh-mime-security-button-map
                           :button-face face
                           :help-echo "Mouse-2 click or press RET (in show buffer) to see security details.")
    (dolist (ov (mh-funcall-if-exists overlays-in begin end))
      (mh-funcall-if-exists overlay-put ov 'evaporate t))
    (when (equal info "Failed")
      (let* ((type (if (equal (car handle) "multipart/signed")
                       "verification" "decryption"))
             (warning (if (equal type "decryption")
                          "(passphrase may be incorrect)" "")))
        (message "%s %s failed %s" crypto-type type warning)))))

(defun mh-mime-security-button-face (info)
  "Return the button face to use for encrypted/signed mail based on INFO."
  (cond ((string-match "OK" info)       ;Decrypted mail
         'mh-show-pgg-good)
        ((string-match "Failed" info)   ;Decryption failed or signature invalid
         'mh-show-pgg-bad)
        ((string-match "Undecided" info);Unprocessed mail
         'mh-show-pgg-unknown)
        ((string-match "Untrusted" info);Key not trusted
         'mh-show-pgg-unknown)
        (t
         'mh-show-pgg-good)))

\f

;;; Button Handlers

(defun mh-folder-mime-action (part-index action include-security-flag)
  "Go to PART-INDEX and carry out ACTION.

If PART-INDEX is nil then go to the next part in the buffer. The
search for the next buffer wraps around if end of buffer is reached.
If argument INCLUDE-SECURITY-FLAG is non-nil then include security
info buttons when searching for a suitable parts."
  (unless mh-showing-mode
    (mh-show))
  (mh-in-show-buffer (mh-show-buffer)
    (let ((criterion
           (cond (part-index
                  (lambda (p)
                    (let ((part (get-text-property p 'mh-part)))
                      (and (integerp part) (= part part-index)))))
                 (t (lambda (p)
                      (if include-security-flag
                          (get-text-property p 'mh-data)
                        (integerp (get-text-property p 'mh-part)))))))
          (point (point)))
      (cond ((and (get-text-property point 'mh-part)
                  (or (null part-index)
                      (= (get-text-property point 'mh-part) part-index)))
             (funcall action))
            ((and (get-text-property point 'mh-data)
                  include-security-flag
                  (null part-index))
             (funcall action))
            (t
             (mh-goto-next-button nil criterion)
             (if (= (point) point)
                 (message "No matching MIME part found")
               (funcall action)))))))

;;;###mh-autoload
(defun mh-goto-next-button (backward-flag &optional criterion)
  "Search for next button satisfying criterion.

If BACKWARD-FLAG is non-nil search backward in the buffer for a mime
button.
If CRITERION is a function or a symbol which has a function binding
then that function must return non-nil at the button we stop."
  (unless (or (and (symbolp criterion) (fboundp criterion))
              (functionp criterion))
    (setq criterion (lambda (x) t)))
  ;; Move to the next button in the buffer satisfying criterion
  (goto-char (or (save-excursion
                   (beginning-of-line)
                   ;; Find point before current button
                   (let ((point-before-current-button
                          (save-excursion
                            (while (get-text-property (point) 'mh-data)
                              (unless (= (forward-line
                                          (if backward-flag 1 -1))
                                         0)
                                (if backward-flag
                                    (goto-char (point-min))
                                  (goto-char (point-max)))))
                            (point))))
                     ;; Skip over current button
                     (while (and (get-text-property (point) 'mh-data)
                                 (not (if backward-flag (bobp) (eobp))))
                       (forward-line (if backward-flag -1 1)))
                     ;; Stop at next MIME button if any exists.
                     (block loop
                       (while (/= (progn
                                    (unless (= (forward-line
                                                (if backward-flag -1 1))
                                               0)
                                      (if backward-flag
                                          (goto-char (point-max))
                                        (goto-char (point-min)))
                                      (beginning-of-line))
                                    (point))
                                  point-before-current-button)
                         (when (and (get-text-property (point) 'mh-data)
                                    (funcall criterion (point)))
                           (return-from loop (point))))
                       nil)))
                 (point))))

(defun mh-widget-press-button (widget el)
  "Callback for widget, WIDGET.
Parameter EL is unused."
  (goto-char (widget-get widget :from))
  (mh-press-button))

(defun mh-press-button ()
  "View contents of button.

This command is a toggle so if you use it again on the same
attachment, the attachment is hidden."
  (interactive)
  (let ((mm-inline-media-tests mh-mm-inline-media-tests)
        (data (get-text-property (point) 'mh-data))
        (function (get-text-property (point) 'mh-callback))
        (buffer-read-only nil)
        (folder mh-show-folder-buffer))
    (mh-flet
     ((mm-handle-set-external-undisplayer
       (handle function)
       (mh-handle-set-external-undisplayer folder handle function)))
     (when (and function (eolp))
       (backward-char))
     (unwind-protect (and function (funcall function data))
       (set-buffer-modified-p nil)))))

(defun mh-push-button (event)
  "Click MIME button for EVENT.

If the MIME part is visible then it is removed. Otherwise the
part is displayed. This function is called when the mouse is used
to click the MIME button."
  (interactive "e")
  (mh-do-at-event-location event
    (let ((folder mh-show-folder-buffer)
          (mm-inline-media-tests mh-mm-inline-media-tests)
          (data (get-text-property (point) 'mh-data))
          (function (get-text-property (point) 'mh-callback)))
      (mh-flet
       ((mm-handle-set-external-undisplayer
         (handle func)
         (mh-handle-set-external-undisplayer folder handle func)))
       (and function (funcall function data))))))

(defun mh-handle-set-external-undisplayer (folder handle function)
  "Replacement for `mm-handle-set-external-undisplayer'.

This is only called in recent versions of Gnus. The MIME handles
are stored in data structures corresponding to MH-E folder buffer
FOLDER instead of in Gnus (as in the original). The MIME part,
HANDLE is associated with the undisplayer FUNCTION."
  (if (mh-mm-keep-viewer-alive-p handle)
      (let ((new-handle (copy-sequence handle)))
        (mm-handle-set-undisplayer new-handle function)
        (mm-handle-set-undisplayer handle nil)
        (with-current-buffer folder
          (push new-handle (mh-mime-handles (mh-buffer-data)))))
    (mm-handle-set-undisplayer handle function)))

(defun mh-mime-security-press-button (handle)
  "Callback from security button for part HANDLE."
  (if (mh-mm-handle-multipart-ctl-parameter handle 'gnus-info)
      (mh-mime-security-show-details handle)
    (let ((region (mh-mm-handle-multipart-ctl-parameter handle 'mh-region))
          point)
      (setq point (point))
      (goto-char (car region))
      (delete-region (car region) (cdr region))
      (with-current-buffer (mh-mm-handle-multipart-ctl-parameter handle 'buffer)
        (let* ((mm-verify-option 'known)
               (mm-decrypt-option 'known)
               (new (mh-mm-possibly-verify-or-decrypt (cdr handle) handle)))
          (unless (eq new (cdr handle))
            (mh-mm-destroy-parts (cdr handle))
            (setcdr handle new))))
      (mh-mime-display-security handle)
      (goto-char point))))

;; I rewrote the security part because Gnus doesn't seem to ever minimize
;; the button. That is once the mime-security button is pressed there seems
;; to be no way of getting rid of the inserted text.
(defun mh-mime-security-show-details (handle)
  "Toggle display of detailed security info for HANDLE."
  (let ((details (mh-mm-handle-multipart-ctl-parameter handle 'gnus-details)))
    (when details
      (let ((mh-mime-security-button-pressed
             (not (get-text-property (point) 'mh-button-pressed)))
            (mh-mime-security-button-line-format
             (get-text-property (point) 'mh-line-format)))
        (forward-char -1)
        (while (eq (get-text-property (point) 'mh-line-format)
                   mh-mime-security-button-line-format)
          (forward-char -1))
        (forward-char)
        (save-restriction
          (narrow-to-region (point) (point))
          (mh-insert-mime-security-button handle))
        (delete-region
         (point)
         (or (text-property-not-all
              (point) (point-max)
              'mh-line-format mh-mime-security-button-line-format)
             (point-max)))
        (forward-line -1)))))

\f

;;; Miscellaneous Article Washing

;;;###mh-autoload
(defun mh-add-missing-mime-version-header ()
  "Some mail programs don't put a MIME-Version header.
I have seen this only in spam, so maybe we shouldn't fix
this ;-)"
  (save-excursion
    (goto-char (point-min))
    (re-search-forward "\n\n" nil t)
    (save-restriction
      (narrow-to-region (point-min) (point))
      (when (and (message-fetch-field "content-type")
                 (not (message-fetch-field "mime-version")))
        (goto-char (point-min))
        (insert "MIME-Version: 1.0\n")))))

;;;###mh-autoload
(defun mh-display-smileys ()
  "Display smileys."
  (when (and mh-graphical-smileys-flag (mh-small-show-buffer-p))
    (mh-funcall-if-exists smiley-region (point-min) (point-max))))

;;;###mh-autoload
(defun mh-display-emphasis ()
  "Display graphical emphasis."
  (when (and mh-graphical-emphasis-flag (mh-small-show-buffer-p))
    (mh-flet
     ((article-goto-body ()))      ; shadow this function to do nothing
     (save-excursion
       (goto-char (point-min))
       (article-emphasize)))))

(defun mh-small-show-buffer-p ()
  "Check if show buffer is small.
This is used to decide if smileys and graphical emphasis should be
displayed."
  (let ((max nil))
    (when (and (boundp 'font-lock-maximum-size) font-lock-maximum-size)
      (cond ((numberp font-lock-maximum-size)
             (setq max font-lock-maximum-size))
            ((listp font-lock-maximum-size)
             (setq max (cdr (or (assoc 'mh-show-mode font-lock-maximum-size)
                                (assoc t font-lock-maximum-size)))))))
    (or (not (numberp max)) (>= (/ max 8) (buffer-size)))))

\f

;;; MH-Letter Commands

;; MH-E commands are alphabetical; specific support routines follow command.

;;;###mh-autoload
(defun mh-compose-forward (&optional description folder range)
  "Add tag to forward a message.

You are prompted for a content DESCRIPTION, the name of the
FOLDER in which the messages to forward are located, and a RANGE
of messages, which defaults to the current message in that
folder. Check the documentation of `mh-interactive-range' to see
how RANGE is read in interactive use.

The option `mh-compose-insertion' controls what type of tags are inserted."
  (interactive
   (let* ((description
           (mml-minibuffer-read-description))
          (folder
           (mh-prompt-for-folder "Message from"
                                 mh-sent-from-folder nil))
          (default
            (if (and (equal folder mh-sent-from-folder)
                     (numberp mh-sent-from-msg))
                mh-sent-from-msg
              (nth 0 (mh-translate-range folder "cur"))))
          (range
           (mh-read-range "Forward" folder
                          (or (and default
                                   (number-to-string default))
                              t)
                          t t)))
     (list description folder range)))
  (let ((messages (mapconcat 'identity (mh-list-to-string range) " ")))
    (dolist (message (mh-translate-range folder messages))
      (if (equal mh-compose-insertion 'mml)
          (mh-mml-forward-message description folder (format "%s" message))
        (mh-mh-forward-message description folder (format "%s" message))))))

;;;###mh-autoload
(defun mh-mml-forward-message (description folder message)
  "Forward a message as attachment.

The function will prompt the user for a DESCRIPTION, a FOLDER and
MESSAGE number."
  (let ((msg (if (and (equal message "") (numberp mh-sent-from-msg))
                 mh-sent-from-msg
               (string-to-number message))))
    (cond ((integerp msg)
           (mml-attach-file (format "%s%s/%d"
                                    mh-user-path (substring folder 1) msg)
                            "message/rfc822"
                            (if (string= "" description) nil description)
                            "inline"))
          (t (error "The message number, %s, is not a integer" msg)))))

(defun mh-mh-forward-message (&optional description folder messages)
  "Add tag to forward a message.
You are prompted for a content DESCRIPTION, the name of the
FOLDER in which the messages to forward are located, and the
MESSAGES' numbers.

See also \\[mh-mh-to-mime]."
  (interactive (list
                (mml-minibuffer-read-description)
                (mh-prompt-for-folder "Message from" mh-sent-from-folder nil)
                (read-string (concat "Messages"
                                     (if (numberp mh-sent-from-msg)
                                         (format " (default %d): "
                                                 mh-sent-from-msg)
                                       ": ")))))
  (beginning-of-line)
  (insert "#forw [")
  (and description
       (not (string= description ""))
       (insert description))
  (insert "]")
  (and folder
       (not (string= folder ""))
       (insert " " folder))
  (if (and messages
           (not (string= messages "")))
      (let ((start (point)))
        (insert " " messages)
        (subst-char-in-region start (point) ?, ? ))
    (if (numberp mh-sent-from-msg)
        (insert " " (int-to-string mh-sent-from-msg))))
  (insert "\n"))

;;;###mh-autoload
(defun mh-compose-insertion (&optional inline)
  "Add tag to include a file such as an image or sound.

You are prompted for the filename containing the object, the
media type if it cannot be determined automatically, and a
content description. If you're using MH-style directives, you
will also be prompted for additional attributes.

The option `mh-compose-insertion' controls what type of tags are
inserted. Optional argument INLINE means make it an inline
attachment."
  (interactive "P")
  (if (equal mh-compose-insertion 'mml)
      (if inline
          (mh-mml-attach-file "inline")
        (mh-mml-attach-file))
    (call-interactively 'mh-mh-attach-file)))

(defun mh-mml-attach-file (&optional disposition)
  "Add a tag to insert a MIME message part from a file.

You are prompted for the filename containing the object, the
media type if it cannot be determined automatically, a content
description and the DISPOSITION of the attachment.

This is basically `mml-attach-file' from Gnus, modified such that a prefix
argument yields an \"inline\" disposition and Content-Type is determined
automatically."
  (let* ((file (mml-minibuffer-read-file "Attach file: "))
         (type (mh-minibuffer-read-type file))
         (description (mml-minibuffer-read-description))
         (dispos (or disposition
                     (mh-mml-minibuffer-read-disposition type))))
    (mml-insert-empty-tag 'part 'type type 'filename file
                          'disposition dispos 'description description)))

(defun mh-mh-attach-file (filename type description attributes)
  "Add a tag to insert a MIME message part from a file.
You are prompted for the FILENAME containing the object, the
media TYPE if it cannot be determined automatically, and a
content DESCRIPTION. In addition, you are also prompted for
additional ATTRIBUTES.

See also \\[mh-mh-to-mime]."
  (interactive (let ((filename (mml-minibuffer-read-file "Attach file: ")))
                 (list
                  filename
                  (mh-minibuffer-read-type filename)
                  (mml-minibuffer-read-description)
                  (read-string "Attributes: "
                               (concat "name=\""
                                       (file-name-nondirectory filename)
                                       "\"")))))
  (mh-mh-compose-type filename type description attributes))

(defun mh-mh-compose-type (filename type
                                     &optional description attributes comment)
  "Insert an MH-style directive to insert a file.
The file specified by FILENAME is encoded as TYPE. An optional
DESCRIPTION is used as the Content-Description field, optional
set of ATTRIBUTES and an optional COMMENT can also be included."
  (beginning-of-line)
  (insert "#" type)
  (and attributes
       (insert "; " attributes))
  (and comment
       (insert " (" comment ")"))
  (insert " [")
  (and description
       (insert description))
  (insert "] " (expand-file-name filename))
  (insert "\n"))

;;;###mh-autoload
(defun mh-mh-compose-anon-ftp (host filename type description)
  "Add tag to include anonymous ftp reference to a file.

You can have your message initiate an \"ftp\" transfer when the
recipient reads the message. You are prompted for the remote HOST
and FILENAME, the media TYPE, and the content DESCRIPTION.

See also \\[mh-mh-to-mime]."
  (interactive (list
                (read-string "Remote host: ")
                (read-string "Remote filename: ")
                (mh-minibuffer-read-type "DUMMY-FILENAME")
                (mml-minibuffer-read-description)))
  (mh-mh-compose-external-type "anon-ftp" host filename
                               type description))

;;;###mh-autoload
(defun mh-mh-compose-external-compressed-tar (host filename description)
  "Add tag to include anonymous ftp reference to a compressed tar file.

In addition to retrieving the file via anonymous \"ftp\" as per
the command \\[mh-mh-compose-anon-ftp], the file will also be
uncompressed and untarred. You are prompted for the remote HOST
and FILENAME and the content DESCRIPTION.

See also \\[mh-mh-to-mime]."
  (interactive (list
                (read-string "Remote host: ")
                (read-string "Remote filename: ")
                (mml-minibuffer-read-description)))
  (mh-mh-compose-external-type "anon-ftp" host filename
                               "application/octet-stream"
                               description
                               "type=tar; conversions=x-compress"
                               "mode=image"))

;; RFC 2045 - Multipurpose Internet Mail Extensions (MIME) Part One:
;;            Format of Internet Message Bodies.
;; RFC 2046 - Multipurpose Internet Mail Extensions (MIME) Part Two:
;;            Media Types.
;; RFC 2049 - Multipurpose Internet Mail Extensions (MIME) Part Five:
;;            Conformance Criteria and Examples.
;; RFC 2017 - Definition of the URL MIME External-Body Access-Type
;; RFC 1738 - Uniform Resource Locators (URL)
(defvar mh-access-types
  '(("anon-ftp")        ; RFC2046 Anonymous File Transfer Protocol
    ("file")            ; RFC1738 Host-specific file names
    ("ftp")             ; RFC2046 File Transfer Protocol
    ("gopher")          ; RFC1738 The Gopher Protocol
    ("http")            ; RFC1738 Hypertext Transfer Protocol
    ("local-file")      ; RFC2046 Local file access
    ("mail-server")     ; RFC2046 mail-server Electronic mail address
    ("mailto")          ; RFC1738 Electronic mail address
    ("news")            ; RFC1738 Usenet news
    ("nntp")            ; RFC1738 Usenet news using NNTP access
    ("prospero")        ; RFC1738 Prospero Directory Service
    ("telnet")          ; RFC1738 Telnet
    ("tftp")            ; RFC2046 Trivial File Transfer Protocol
    ("url")             ; RFC2017 URL scheme MIME access-type Protocol
    ("wais"))           ; RFC1738 Wide Area Information Servers
  "Valid MIME access-type values.")

;;;###mh-autoload
(defun mh-mh-compose-external-type (access-type host filename type
                                                &optional description
                                                attributes parameters
                                                comment)
  "Add tag to refer to a remote file.

This command is a general utility for referencing external files.
In fact, all of the other commands that insert directives to
access external files call this command. You are prompted for the
ACCESS-TYPE, remote HOST and FILENAME, and content TYPE. If you
provide a prefix argument, you are also prompted for a content
DESCRIPTION, ATTRIBUTES, PARAMETERS, and a COMMENT.

See also \\[mh-mh-to-mime]."
  (interactive (list
                (completing-read "Access type: " mh-access-types)
                (read-string "Remote host: ")
                (read-string "Remote filename: ")
                (mh-minibuffer-read-type "DUMMY-FILENAME")
                (if current-prefix-arg (mml-minibuffer-read-description))
                (if current-prefix-arg (read-string "Attributes: "))
                (if current-prefix-arg (read-string "Parameters: "))
                (if current-prefix-arg (read-string "Comment: "))))
  (beginning-of-line)
  (insert "#@" type)
  (and attributes
       (insert "; " attributes))
  (and comment
       (insert " (" comment ") "))
  (insert " [")
  (and description
       (insert description))
  (insert "] ")
  (insert "access-type=" access-type "; ")
  (insert "site=" host)
  (insert "; name=" (file-name-nondirectory filename))
  (let ((directory (file-name-directory filename)))
    (and directory
         (insert "; directory=\"" directory "\"")))
  (and parameters
       (insert "; " parameters))
  (insert "\n"))

(defvar mh-mh-to-mime-args nil
  "Extra arguments for \\[mh-mh-to-mime] to pass to the \"mhbuild\" command.
The arguments are passed to \"mhbuild\" if \\[mh-mh-to-mime] is
given a prefix argument. Normally default arguments to
\"mhbuild\" are specified in the MH profile.")

;;;###mh-autoload
(defun mh-mh-to-mime (&optional extra-args)
  "Compose MIME message from MH-style directives.

Typically, you send a message with attachments just like any other
message. However, you may take a sneak preview of the MIME encoding if
you wish by running this command.

If you wish to pass additional arguments to \"mhbuild\" (\"mhn\")
to affect how it builds your message, use the option
`mh-mh-to-mime-args'. For example, you can build a consistency
check into the message by setting `mh-mh-to-mime-args' to
\"-check\". The recipient of your message can then run \"mhbuild
-check\" on the message--\"mhbuild\" (\"mhn\") will complain if
the message has been corrupted on the way. This command only
consults this option when given a prefix argument EXTRA-ARGS.

The hook `mh-mh-to-mime-hook' is called after the message has been
formatted.

The effects of this command can be undone by running
\\[mh-mh-to-mime-undo]."
  (interactive "*P")
  (mh-mh-quote-unescaped-sharp)
  (save-buffer)
  (message "Running %s..." (if (mh-variant-p 'nmh) "mhbuild" "mhn"))
  (cond
   ((mh-variant-p 'nmh)
    (mh-exec-cmd-error nil
                       "mhbuild"
                       (if extra-args mh-mh-to-mime-args)
                       buffer-file-name))
   (t
    (mh-exec-cmd-error (format "mhdraft=%s" buffer-file-name)
                       "mhn"
                       (if extra-args mh-mh-to-mime-args)
                       buffer-file-name)))
  (revert-buffer t t t)
  (message "Running %s...done" (if (mh-variant-p 'nmh) "mhbuild" "mhn"))
  (run-hooks 'mh-mh-to-mime-hook))

(defun mh-mh-quote-unescaped-sharp ()
  "Quote \"#\" characters that haven't been quoted for \"mhbuild\".
If the \"#\" character is present in the first column, but it isn't
part of a MH-style directive then \"mhbuild\" gives an error.
This function will quote all such characters."
  (save-excursion
    (goto-char (point-min))
    (while (re-search-forward "^#" nil t)
      (beginning-of-line)
      (unless (mh-mh-directive-present-p (point) (mh-line-end-position))
        (insert "#"))
      (goto-char (mh-line-end-position)))))

;;;###mh-autoload
(defun mh-mh-to-mime-undo (noconfirm)
  "Undo effects of \\[mh-mh-to-mime].

It does this by reverting to a backup file. You are prompted to
confirm this action, but you can avoid the confirmation by adding
a prefix argument NOCONFIRM."
  (interactive "*P")
  (if (null buffer-file-name)
      (error "Buffer does not seem to be associated with any file"))
  (let ((backup-strings '("," "#"))
        backup-file)
    (while (and backup-strings
                (not (file-exists-p
                      (setq backup-file
                            (concat (file-name-directory buffer-file-name)
                                    (car backup-strings)
                                    (file-name-nondirectory buffer-file-name)
                                    ".orig")))))
      (setq backup-strings (cdr backup-strings)))
    (or backup-strings
        (error "Backup file for %s no longer exists" buffer-file-name))
    (or noconfirm
        (yes-or-no-p (format "Revert buffer from file %s? "
                             backup-file))
        (error "Revert not confirmed"))
    (let ((buffer-read-only nil))
      (erase-buffer)
      (insert-file-contents backup-file))
    (after-find-file nil nil nil nil t)))

;; Shush compiler.
(defvar mh-identity-pgg-default-user-id)

;;;###mh-autoload
(defun mh-mml-secure-message-encrypt (method)
  "Add tag to encrypt the message.

A proper multipart message is created for you when you send the
message. Use the command \\[mh-mml-unsecure-message] to remove
this tag. Use a prefix argument METHOD to be prompted for one of
the possible security methods (see `mh-mml-method-default')."
  (interactive (list (mh-mml-query-cryptographic-method)))
  (mh-secure-message method "encrypt" mh-identity-pgg-default-user-id))

;;;###mh-autoload
(defun mh-mml-secure-message-sign (method)
  "Add tag to sign the message.

A proper multipart message is created for you when you send the
message. Use the command \\[mh-mml-unsecure-message] to remove
this tag. Use a prefix argument METHOD to be prompted for one of
the possible security methods (see `mh-mml-method-default')."
  (interactive (list (mh-mml-query-cryptographic-method)))
  (mh-secure-message method "sign" mh-identity-pgg-default-user-id))

;;;###mh-autoload
(defun mh-mml-secure-message-signencrypt (method)
  "Add tag to encrypt and sign the message.

A proper multipart message is created for you when you send the
message. Use the command \\[mh-mml-unsecure-message] to remove
this tag. Use a prefix argument METHOD to be prompted for one of
the possible security methods (see `mh-mml-method-default')."
  (interactive (list (mh-mml-query-cryptographic-method)))
  (mh-secure-message method "signencrypt" mh-identity-pgg-default-user-id))

(defvar mh-mml-cryptographic-method-history ())

(defun mh-mml-query-cryptographic-method ()
  "Read the cryptographic method to use."
  (if current-prefix-arg
      (let ((def (or (car mh-mml-cryptographic-method-history)
                     mh-mml-method-default)))
        (completing-read (format "Method (default %s): " def)
                         '(("pgp") ("pgpmime") ("smime"))
                         nil t nil 'mh-mml-cryptographic-method-history def))
    mh-mml-method-default))

(defun mh-secure-message (method mode &optional identity)
  "Add tag to encrypt or sign message.

METHOD should be one of: \"pgpmime\", \"pgp\", \"smime\".
MODE should be one of: \"sign\", \"encrypt\", \"signencrypt\", \"none\".
IDENTITY is optionally the default-user-id to use."
  (if (not mh-pgp-support-flag)
      (error "Your version of Gnus does not support PGP/GPG")
    ;; Check the arguments
    (let ((valid-methods (list "pgpmime" "pgp" "smime"))
          (valid-modes (list "sign" "encrypt" "signencrypt" "none")))
      (if (not (member method valid-methods))
          (error "Method %s is invalid" method))
      (if (not (member mode valid-modes))
          (error "Mode %s is invalid" mode))
      (mml-unsecure-message)
      (if (not (string= mode "none"))
        (save-excursion
          (goto-char (point-min))
          (mh-goto-header-end 1)
          (if mh-identity-pgg-default-user-id
              (mml-insert-tag 'secure 'method method 'mode mode
                              'sender mh-identity-pgg-default-user-id)
            (mml-insert-tag 'secure 'method method 'mode mode)))))))

;;;###mh-autoload
(defun mh-mml-to-mime ()
  "Compose MIME message from MML tags.

Typically, you send a message with attachments just like any
other message. However, you may take a sneak preview of the MIME
encoding if you wish by running this command.

This action can be undone by running \\[undo]."
  (interactive)
  (require 'message)
  (when mh-pgp-support-flag
    ;; PGP requires actual e-mail addresses, not aliases.
    ;; Parse the recipients and sender from the message.
    (message-options-set-recipient)
    ;; Do an alias lookup on sender (if From field is present).
    (when (message-options-get 'message-sender)
      (message-options-set 'message-sender
                           (mail-strip-quoted-names
                            (mh-alias-expand
                             (message-options-get 'message-sender)))))
    ;; Do an alias lookup on recipients
    (message-options-set 'message-recipients
                         (mapconcat
                          (lambda (ali)
                            (mail-strip-quoted-names (mh-alias-expand ali)))
                          (split-string (message-options-get 'message-recipients) "[, ]+")
                          ", ")))
  (let ((saved-text (buffer-string))
        (buffer (current-buffer))
        (modified-flag (buffer-modified-p)))
    (condition-case err (mml-to-mime)
      (error
       (with-current-buffer buffer
         (delete-region (point-min) (point-max))
         (insert saved-text)
         (set-buffer-modified-p modified-flag))
       (error (error-message-string err))))))

;;;###mh-autoload
(defun mh-mml-unsecure-message ()
  "Remove any secure message tags."
  (interactive)
  (if (not mh-pgp-support-flag)
      (error "Your version of Gnus does not support PGP/GPG")
    (mml-unsecure-message)))

\f

;;; Support Routines for MH-Letter Commands

;;;###mh-autoload
(defun mh-mml-tag-present-p ()
  "Check if the current buffer has text which may be a MML tag."
  (save-excursion
    (goto-char (point-min))
    (re-search-forward
     (concat
      "\\(<#\\(mml\\|part\\)\\(.\\|\n\\)*>[ \n\t]*<#/\\(mml\\|part\\)>\\|"
      "^<#secure.+>$\\)")
     nil t)))

(defvar mh-media-type-regexp
  (concat (regexp-opt '("text" "image" "audio" "video" "application"
                        "multipart" "message") t)
          "/[-.+a-zA-Z0-9]+")
  "Regexp matching valid media types used in MIME attachment compositions.")

;;;###mh-autoload
(defun mh-mh-directive-present-p (&optional begin end)
  "Check if the text between BEGIN and END might be a MH-style directive.
The optional argument BEGIN defaults to the beginning of the
buffer, while END defaults to the end of the buffer."
  (unless begin (setq begin (point-min)))
  (unless end (setq end (point-max)))
  (save-excursion
    (block search-for-mh-directive
      (goto-char begin)
      (while (re-search-forward "^#" end t)
        (let ((s (buffer-substring-no-properties
                  (point) (mh-line-end-position))))
          (cond ((equal s ""))
                ((string-match "^forw[ \t\n]+" s)
                 (return-from search-for-mh-directive t))
                (t (let ((first-token (car (split-string s "[ \t;@]"))))
                     (when (and first-token
                                (string-match mh-media-type-regexp
                                              first-token))
                       (return-from search-for-mh-directive t)))))))
      nil)))

(defun mh-minibuffer-read-type (filename &optional default)
  "Return the content type associated with the given FILENAME.
If the \"file\" command exists and recognizes the given file,
then its value is returned; otherwise, the user is prompted for
a type (see `mailcap-mime-types').
Optional argument DEFAULT is returned if a type isn't entered."
  (mailcap-parse-mimetypes)
  (let* ((default (or default
                      (mm-default-file-encoding filename)
                      "application/octet-stream"))
         (probed-type (mh-file-mime-type filename))
         (type (or (and (not (equal probed-type "application/octet-stream"))
                        probed-type)
                   (completing-read
                    (format "Content type (default %s): " default)
                    (mapcar 'list (mailcap-mime-types))))))
    (if (not (equal type ""))
        type
      default)))

;;;###mh-autoload
(defun mh-file-mime-type (filename)
  "Return MIME type of FILENAME from file command.
Returns nil if file command not on system."
  (cond
   ((not (mh-have-file-command))
    nil)                                ;no file command, exit now
   ((not (and (file-exists-p filename)
              (file-readable-p filename)))
    nil)                               ;no file or not readable, ditto
   (t
    (let ((tmp-buffer (get-buffer-create mh-temp-buffer)))
      (with-current-buffer tmp-buffer
        (unwind-protect
            (progn
              (call-process "file" nil '(t nil) nil "-b" "-i"
                            (expand-file-name filename))
              (goto-char (point-min))
              (if (not (re-search-forward mh-media-type-regexp nil t))
                  nil
                (mh-file-mime-type-substitute (match-string 0) filename)))
          (kill-buffer tmp-buffer)))))))

(defvar mh-file-mime-type-substitutions
  '(("application/msword" "\\.xls" "application/ms-excel")
    ("application/msword" "\\.ppt" "application/ms-powerpoint")
    ("text/plain" "\\.vcf" "text/x-vcard")
    ("text/rtf" "\\.rtf" "application/rtf")
    ("application/x-zip" "\\.sxc" "application/vnd.sun.xml.calc")
    ("application/x-zip" "\\.sxd" "application/vnd.sun.xml.draw")
    ("application/x-zip" "\\.sxi" "application/vnd.sun.xml.impress")
    ("application/x-zip" "\\.sxw" "application/vnd.sun.xml.writer")
    ("application/x-zip" "\\.odg" "application/vnd.oasis.opendocument.graphics")
    ("application/x-zip" "\\.odi" "application/vnd.oasis.opendocument.image")
    ("application/x-zip" "\\.odp"
     "application/vnd.oasis.opendocument.presentation")
    ("application/x-zip" "\\.ods"
     "application/vnd.oasis.opendocument.spreadsheet")
    ("application/x-zip" "\\.odt" "application/vnd.oasis.opendocument.text"))
  "Substitutions to make for Content-Type returned from file command.
The first element is the Content-Type returned by the file command.
The second element is a regexp matching the file name, usually the
extension.
The third element is the Content-Type to replace with.")

(defun mh-file-mime-type-substitute (content-type filename)
  "Return possibly changed CONTENT-TYPE on the FILENAME.
Substitutions are made from the `mh-file-mime-type-substitutions'
variable."
  (let ((subst mh-file-mime-type-substitutions)
        (type) (match) (answer content-type)
        (case-fold-search t))
    (while subst
      (setq type (car (car subst))
            match (elt (car subst) 1))
      (if (and (string-equal content-type type)
               (string-match match filename))
          (setq answer (elt (car subst) 2)
                subst nil)
        (setq subst (cdr subst))))
    answer))

(defvar mh-have-file-command 'undefined
  "Cached value of function `mh-have-file-command'.
Do not reference this variable directly as it might not have been
initialized. Always use the command `mh-have-file-command'.")

;;;###mh-autoload
(defun mh-have-file-command ()
  "Return t if `file' command is on the system.
'file -i' is used to get MIME type of composition insertion."
  (when (eq mh-have-file-command 'undefined)
    (setq mh-have-file-command
          (and (fboundp 'executable-find)
               (executable-find "file") ; file command exists
                                        ;   and accepts -i and -b args.
               (zerop (call-process "file" nil nil nil "-i" "-b"
                                    (expand-file-name "inc" mh-progs))))))
  mh-have-file-command)

\f

;;; MIME Cleanup

;;;###mh-autoload
(defun mh-mime-cleanup ()
  "Free the decoded MIME parts."
  (let ((mime-data (gethash (current-buffer) mh-globals-hash)))
    ;; This is for Emacs, what about XEmacs?
    (mh-funcall-if-exists remove-images (point-min) (point-max))
    (when mime-data
      (mh-mm-destroy-parts (mh-mime-handles mime-data))
      (remhash (current-buffer) mh-globals-hash))))

;;;###mh-autoload
(defun mh-destroy-postponed-handles ()
  "Free MIME data for externally displayed MIME parts."
  (let ((mime-data (mh-buffer-data)))
    (when mime-data
      (mh-mm-destroy-parts (mh-mime-handles mime-data)))
    (remhash (current-buffer) mh-globals-hash)))

(provide 'mh-mime)

;; Local Variables:
;; indent-tabs-mode: nil
;; sentence-end-double-space: nil
;; End:

;;; mh-mime.el ends here

debug log:

solving 69c57e0 ...
found 69c57e0 in https://git.savannah.gnu.org/cgit/emacs.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.