all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob e609aa7405a5e1e3b7e2af0bf6a0d8c8f163ad49 324410 bytes (raw)
name: lisp/gnus/message.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
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
 
;;; message.el --- composing mail and news messages -*- lexical-binding: t -*-

;; Copyright (C) 1996-2022 Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: mail, news

;; 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:

;; This mode provides mail-sending facilities from within Emacs.  It
;; consists mainly of large chunks of code from the sendmail.el,
;; gnus-msg.el and rnewspost.el files.

;;; Code:

(require 'cl-lib)
(require 'mailheader)
(require 'gmm-utils)
(require 'mail-utils)
;; Only for the trivial macros mail-header-from, mail-header-date
;; mail-header-references, mail-header-subject, mail-header-id
(eval-when-compile (require 'nnheader))
;; This is apparently necessary even though things are autoloaded.
;; Because we dynamically bind mail-abbrev-mode-regexp, we'd better
;; require mailabbrev here.
(require 'mailabbrev)
(require 'mail-parse)
(require 'mml)
(require 'rfc822)
(require 'dired)
(require 'mm-util)
(require 'rfc2047)
(require 'puny)
(require 'rmc)                          ; read-multiple-choice
(require 'subr-x)
(require 'yank-media)
(require 'mailcap)
(require 'sendmail)

(autoload 'mailclient-send-it "mailclient")

(defvar gnus-message-group-art)
(defvar gnus-list-identifiers) ; gnus-sum is required where necessary
(defvar rmail-enable-mime-composing)

(defgroup message '((user-mail-address custom-variable)
		    (user-full-name custom-variable))
  "Mail and news message composing."
  :link '(custom-manual "(message)Top")
  :group 'mail
  :group 'news)

(defgroup message-various nil
  "Various Message Variables."
  :link '(custom-manual "(message)Various Message Variables")
  :group 'message)

(defgroup message-buffers nil
  "Message Buffers."
  :link '(custom-manual "(message)Message Buffers")
  :group 'message)

(defgroup message-sending nil
  "Message Sending."
  :link '(custom-manual "(message)Sending Variables")
  :group 'message)

(defgroup message-interface nil
  "Message Interface."
  :link '(custom-manual "(message)Interface")
  :group 'message)

(defgroup message-forwarding nil
  "Message Forwarding."
  :link '(custom-manual "(message)Forwarding")
  :group 'message-interface)

(defgroup message-insertion nil
  "Message Insertion."
  :link '(custom-manual "(message)Insertion")
  :group 'message)

(defgroup message-headers nil
  "Message Headers."
  :link '(custom-manual "(message)Message Headers")
  :group 'message)

(defgroup message-news nil
  "Composing News Messages."
  :group 'message)

(defgroup message-mail nil
  "Composing Mail Messages."
  :group 'message)

(defgroup message-faces nil
  "Faces used for message composing."
  :group 'message
  :group 'faces)

(defcustom message-directory "~/Mail/"
  "Directory from which all other mail file variables are derived."
  :group 'message-various
  :type 'directory)

(defcustom message-max-buffers 10
  "How many buffers to keep before starting to kill them off."
  :group 'message-buffers
  :type 'integer)

(defcustom message-send-rename-function #'message-default-send-rename-function
  "Function called to rename the buffer after sending it."
  :group 'message-buffers
  :version "28.1"
  :type 'function)

(defcustom message-fcc-handler-function #'message-output
  "A function called to save outgoing articles.
This function will be called with the name of the file to store the
article in.  The default function is `message-output' which saves in Unix
mailbox format."
  :type '(radio (function-item message-output)
		(function :tag "Other"))
  :group 'message-sending)

(defcustom message-fcc-externalize-attachments nil
  "If non-nil, attachments are included as external parts in Fcc copies."
  :version "22.1"
  :type 'boolean
  :group 'message-sending)

(defcustom message-courtesy-message
  "The following message is a courtesy copy of an article\nthat has been posted to %s as well.\n\n"
  "This is inserted at the start of a mailed copy of a posted message.
If the string contains the format spec \"%s\", the Newsgroups
the article has been posted to will be inserted there.
If this variable is nil, no such courtesy message will be added."
  :group 'message-sending
  :type '(radio string (const nil)))

(defcustom message-ignored-bounced-headers
  "^\\(Received\\|Return-Path\\|Delivered-To\\):"
  "Regexp that matches headers to be removed in resent bounced mail."
  :group 'message-interface
  :type 'regexp)

(defcustom message-from-style 'angles
  "Specifies how \"From\" headers look.

If nil, they contain just the return address like:
	king@grassland.com
If `parens', they look like:
	king@grassland.com (Elvis Parsley)
If `angles', they look like:
	Elvis Parsley <king@grassland.com>

Otherwise, most addresses look like `angles', but they look like
`parens' if `angles' would need quoting and `parens' would not."
  :version "27.1"
  :type '(choice (const :tag "simple" nil)
		 (const parens)
		 (const angles)
		 (const default))
  :group 'message-headers)
(make-obsolete-variable
 'message-from-style
 "Only the `angles' value is valid according to RFC2822" "27.1")


(defcustom message-insert-canlock t
  "Whether to insert a Cancel-Lock header in news postings."
  :version "22.1"
  :group 'message-headers
  :type 'boolean)

(defcustom message-syntax-checks
  (if message-insert-canlock '((sender . disabled)) nil)
  "Controls what syntax checks should not be performed on outgoing posts.
To disable checking of long signatures, for instance, add
 `(signature . disabled)' to this list.

Don't touch this variable unless you really know what you're doing.

See the Message manual for the meanings of the valid syntax check
types."
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(alist
	  :key-type symbol
	  :value-type (const disabled)
	  :options (approved bogus-recipient continuation-headers
		    control-chars empty existing-newsgroups from illegible-text
		    invisible-text long-header-lines long-lines message-id
		    multiple-headers new-text newgroups quoting-style
		    repeated-newsgroups reply-to sender sendsys shoot
		    shorten-followup-to signature size subject subject-cmsg
		    valid-newsgroups)))

(defcustom message-required-headers '((optional . References)
				      From)
  "Headers to be generated or prompted for when sending a message.
Also see `message-required-news-headers' and
`message-required-mail-headers'."
  :version "22.1"
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat sexp))

(defcustom message-draft-headers '(References From)
  "Headers to be generated when saving a draft message."
  :version "28.1"
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat sexp))

(defcustom message-required-news-headers
  '(From Newsgroups Subject Date Message-ID
	 (optional . Organization)
	 (optional . User-Agent))
  "Headers to be generated or prompted for when posting an article.
RFC977 and RFC1036 require From, Date, Newsgroups, Subject,
Message-ID.  Organization, Lines, In-Reply-To, Expires, and
User-Agent are optional.  If you don't want message to insert some
header, remove it from this list."
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat sexp))

(defcustom message-required-mail-headers
  '(From Subject Date (optional . In-Reply-To) Message-ID
	 (optional . User-Agent))
  "Headers to be generated or prompted for when mailing a message.
It is recommended that From, Date, To, Subject and Message-ID be
included.  Organization and User-Agent are optional."
  :group 'message-mail
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat sexp))

(defcustom message-prune-recipient-rules nil
  "Rules for how to prune the list of recipients when doing wide replies.
This is a list of regexps and regexp matches."
  :version "24.1"
  :group 'message-mail
  :group 'message-headers
  :link '(custom-manual "(message)Wide Reply")
  :type '(repeat regexp))

(defcustom message-deletable-headers '(Message-ID Date Lines)
  "Headers to delete if present and previously generated by message."
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat (symbol :tag "Header")))

(defcustom message-ignored-news-headers
  "^NNTP-Posting-Host:\\|^Xref:\\|^[BGF]cc:\\|^Resent-Fcc:\\|^X-Draft-From:\\|^X-Gnus-Agent-Meta-Information:\\|^X-Message-SMTP-Method:\\|^X-Gnus-Delayed:"
  "Regexp of headers to be removed unconditionally before posting."
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-ignored-mail-headers
  "^\\([GF]cc\\|Resent-Fcc\\|Xref\\|X-Draft-From\\|X-Gnus-Agent-Meta-Information\\):"
  "Regexp of headers to be removed unconditionally before mailing."
  :group 'message-mail
  :group 'message-headers
  :link '(custom-manual "(message)Mail Headers")
  :type 'regexp)

(defcustom message-ignored-supersedes-headers "^Path:\\|^Date\\|^NNTP-Posting-Host:\\|^Xref:\\|^Lines:\\|^Received:\\|^X-From-Line:\\|^X-Trace:\\|^X-ID:\\|^X-Complaints-To:\\|Return-Path:\\|^Supersedes:\\|^NNTP-Posting-Date:\\|^X-Trace:\\|^X-Complaints-To:\\|^Cancel-Lock:\\|^Cancel-Key:\\|^X-Hashcash:\\|^X-Payment:\\|^Approved:\\|^Injection-Date:\\|^Injection-Info:"
  "Header lines matching this regexp will be deleted before posting.
It's best to delete old Path and Date headers before posting to avoid
any confusion."
  :group 'message-interface
  :link '(custom-manual "(message)Superseding")
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-subject-re-regexp
  "^[ \t]*\\([Rr][Ee]\\(\\[[0-9]*\\]\\)* ?:[ \t]*\\)*[ \t]*"
  "Regexp matching \"Re: \" in the subject line."
  :group 'message-various
  :link '(custom-manual "(message)Message Headers")
  :type 'regexp)

(defcustom message-screenshot-command '("import" "png:-")
  "Command to take a screenshot.
The command should insert a PNG in the current buffer."
  :group 'message-various
  :type '(repeat string)
  :version "28.1")

;;; Start of variables adopted from `message-utils.el'.

(defcustom message-subject-trailing-was-query t
  "What to do with trailing \"(was: <old subject>)\" in subject lines.
If nil, leave the subject unchanged.  If it is the symbol `ask', query
the user what to do.  In this case, the subject is matched against
`message-subject-trailing-was-ask-regexp'.  If
`message-subject-trailing-was-query' is t, always strip the trailing
old subject.  In this case, `message-subject-trailing-was-regexp' is
used."
  :version "24.1"
  :type '(choice (const :tag "never" nil)
		 (const :tag "always strip" t)
		 (const ask))
  :link '(custom-manual "(message)Message Headers")
  :group 'message-various)

(defcustom message-subject-trailing-was-ask-regexp
  "[ \t]*\\([[(]+[Ww][Aa][Ss].*[])]+\\)"
  "Regexp matching \"(was: <old subject>)\" in the subject line.

The function `message-strip-subject-trailing-was' uses this regexp if
`message-subject-trailing-was-query' is set to the symbol `ask'.  If
the variable is t instead of `ask', use
`message-subject-trailing-was-regexp' instead.

It is okay to create some false positives here, as the user is asked."
  :version "22.1"
  :group 'message-various
  :link '(custom-manual "(message)Message Headers")
  :type 'regexp)

(defcustom message-subject-trailing-was-regexp
  "[ \t]*\\((*[Ww][Aa][Ss]:.*)\\)"
  "Regexp matching \"(was: <old subject>)\" in the subject line.

If `message-subject-trailing-was-query' is set to t, the subject is
matched against `message-subject-trailing-was-regexp' in
`message-strip-subject-trailing-was'.  You should use a regexp creating very
few false positives here."
  :version "22.1"
  :group 'message-various
  :link '(custom-manual "(message)Message Headers")
  :type 'regexp)

;;; marking inserted text

(defcustom message-mark-insert-begin
  "--8<---------------cut here---------------start------------->8---\n"
  "How to mark the beginning of some inserted text."
  :version "22.1"
  :type 'string
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-various)

(defcustom message-mark-insert-end
  "--8<---------------cut here---------------end--------------->8---\n"
  "How to mark the end of some inserted text."
  :version "22.1"
  :type 'string
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-various)

(defcustom message-archive-header "X-No-Archive: Yes\n"
  "Header to insert when you don't want your article to be archived.
Archives \(such as groups.google.com) respect this header."
  :version "22.1"
  :type 'string
  :link '(custom-manual "(message)Header Commands")
  :group 'message-various)

(defcustom message-archive-note
  "X-No-Archive: Yes - save https://groups.google.com/"
  "Note to insert why you wouldn't want this posting archived.
If nil, don't insert any text in the body."
  :version "22.1"
  :type '(radio string (const nil))
  :link '(custom-manual "(message)Header Commands")
  :group 'message-various)

;;; Crossposts and Followups
;; inspired by JoH-followup-to by Jochem Huhman <joh  at gmx.de>
;; new suggestions by R. Weikusat <rw at another.de>

(defvar-local message-cross-post-old-target nil
  "Old target for cross-posts or follow-ups.")

(defcustom message-cross-post-default t
  "When non-nil `message-cross-post-followup-to' will perform a crosspost.
If nil, `message-cross-post-followup-to' will only do a followup.  Note that
you can explicitly override this setting by calling
`message-cross-post-followup-to' with a prefix."
  :version "22.1"
  :type 'boolean
  :group 'message-various)

(defcustom message-cross-post-note "Crosspost & Followup-To: "
  "Note to insert before signature to notify of cross-post and follow-up."
  :version "22.1"
  :type 'string
  :group 'message-various)

(defcustom message-followup-to-note "Followup-To: "
  "Note to insert before signature to notify of follow-up only."
  :version "22.1"
  :type 'string
  :group 'message-various)

(defcustom message-cross-post-note-function #'message-cross-post-insert-note
  "Function to use to insert note about Crosspost or Followup-To.
The function will be called with four arguments.  The function should not only
insert a note, but also ensure old notes are deleted.  See the documentation
for `message-cross-post-insert-note'."
  :version "22.1"
  :type 'function
  :group 'message-various)

;;; End of variables adopted from `message-utils.el'.

(defcustom message-signature-separator "^-- $"
  "Regexp matching the signature separator.
This variable is used to strip off the signature from quoted text
when `message-cite-function' is
`message-cite-original-without-signature'.  Most useful values
are \"^-- $\" (strict) and \"^-- *$\" (loose; allow missing
whitespace)."
  :type '(choice (const :tag "strict" "^-- $")
		 (const :tag "loose" "^-- *$")
		 regexp)
  :version "22.3" ;; Gnus 5.10.12 (changed default)
  :link '(custom-manual "(message)Various Message Variables")
  :group 'message-various)

(defcustom message-elide-ellipsis "\n[...]\n\n"
  "The string which is inserted for elided text.
This is a `format-spec' string, and you can use %l to say how
many lines were removed, and %c to say how many characters were
removed."
  :type 'string
  :link '(custom-manual "(message)Various Commands")
  :group 'message-various)

(defcustom message-interactive mail-interactive
  "Non-nil means when sending a message wait for and display errors.
A value of nil means let mailer mail back a message to report errors."
  :version "23.2"
  :group 'message-sending
  :group 'message-mail
  :link '(custom-manual "(message)Sending Variables")
  :type 'boolean)

(defcustom message-confirm-send nil
  "When non-nil, ask for confirmation when sending a message."
  :group 'message-sending
  :group 'message-mail
  :version "23.1" ;; No Gnus
  :link '(custom-manual "(message)Sending Variables")
  :type 'boolean)

(defcustom message-generate-new-buffers 'unsent
  "Say whether to create a new message buffer to compose a message.
Valid values include:

nil
  Generate the buffer name in the Message way (e.g., *mail*, *news*,
  *mail to whom*, *news on group*, etc.) and continue editing in the
  existing buffer of that name.  If there is no such buffer, it will
  be newly created.

`unique' or t
  Create the new buffer with the name generated in the Message way.

`unsent'
  Similar to `unique' but the buffer name begins with \"*unsent \".

`standard'
  Similar to nil but the buffer name is simpler like *mail message*.

function
  If this is a function, call that function with three parameters:
  The type, the To address and the group name (any of these may be nil).
  The function should return the new buffer name."
  :version "24.1"
  :group 'message-buffers
  :link '(custom-manual "(message)Message Buffers")
  :type '(choice (const nil)
		 (sexp :tag "unique" :format "unique\n" :value unique
		       :match (lambda (widget value) (memq value '(unique t))))
		 (const unsent)
		 (const standard)
		 (function :format "\n    %{%t%}: %v")))

(defcustom message-kill-buffer-on-exit nil
  "Non-nil means that the message buffer will be killed after sending a message."
  :group 'message-buffers
  :link '(custom-manual "(message)Message Buffers")
  :type 'boolean)

(defcustom message-kill-buffer-query t
  "Non-nil means that killing a modified message buffer has to be confirmed.
This is used by `message-kill-buffer'."
  :version "23.1" ;; No Gnus
  :group 'message-buffers
  :type 'boolean)

(defcustom message-user-organization
  (or (getenv "ORGANIZATION") t)
  "String to be used as an Organization header.
If t, use `message-user-organization-file'."
  :group 'message-headers
  :type '(choice string
		 (const :tag "consult file" t)))

(defcustom message-user-organization-file
  (let (orgfile)
    (dolist (f (list "/etc/organization"
		     "/etc/news/organization"
		     "/usr/lib/news/organization"))
      (when (file-readable-p f)
	(setq orgfile f)))
    orgfile)
  "Local news organization file."
  :type '(choice (const nil) file)
  :link '(custom-manual "(message)News Headers")
  :group 'message-headers)

(defcustom message-make-forward-subject-function
  (list #'message-forward-subject-name-subject)
  "List of functions called to generate subject headers for forwarded messages.
The subject generated by the previous function is passed into each
successive function.

The provided functions are:

* `message-forward-subject-author-subject' Source of article (author or
      newsgroup), in brackets followed by the subject
* `message-forward-subject-name-subject' Source of article (name of author
      or newsgroup), in brackets followed by the subject
* `message-forward-subject-fwd' Subject of article with `Fwd:' prepended
      to it."
  :group 'message-forwarding
  :link '(custom-manual "(message)Forwarding")
  :version "27.1"
  :type '(repeat :tag "List of functions"
                 (radio (function-item message-forward-subject-author-subject)
                        (function-item message-forward-subject-fwd)
                        (function-item message-forward-subject-name-subject)
                        (function))))

(defcustom message-forward-as-mime nil
  "Non-nil means forward messages as an inline/rfc822 MIME section.
Otherwise, directly inline the old message in the forwarded
message.

When forwarding as MIME, certain MIME-related headers in the
forwarded message may be removed/altered to ensure that the
resulting mail is syntactically valid."
  :version "27.1"
  :group 'message-forwarding
  :link '(custom-manual "(message)Forwarding")
  :type 'boolean)

(defcustom message-forward-show-mml 'best
  "Non-nil means show forwarded messages as MML (decoded from MIME).
Otherwise, forwarded messages are unchanged.
Can also be the symbol `best' to indicate that MML should be
used, except when it is a bad idea to use MML.  One example where
it is a bad idea is when forwarding a signed or encrypted
message, because converting MIME to MML would invalidate the
digital signature."
  :version "21.1"
  :group 'message-forwarding
  :type '(choice (const :tag "use MML" t)
		 (const :tag "don't use MML " nil)
		 (const :tag "use MML when appropriate" best)))

(defcustom message-forward-before-signature t
  "Non-nil means put forwarded message before signature, else after."
  :group 'message-forwarding
  :type 'boolean)

(defcustom message-wash-forwarded-subjects nil
  "Non-nil means try to remove as much cruft as possible from the subject.
Done before generating the new subject of a forward."
  :group 'message-forwarding
  :link '(custom-manual "(message)Forwarding")
  :type 'boolean)

(defcustom message-ignored-resent-headers
  ;; `Delivered-To' needs to be removed because some mailers use it to
  ;; detect loops, so if you resend a message to an address that ultimately
  ;; comes back to you (e.g. a mailing-list to which you subscribe, in which
  ;; case you may be removed from the list on the grounds that mail to you
  ;; bounced with a "mailing loop" error).
  "^Return-receipt\\|^X-Gnus\\|^Gnus-Warning:\\|^>?From \\|^Delivered-To:\
\\|^X-Content-Length:\\|^X-UIDL:"
  "All headers that match this regexp will be deleted when resending a message."
  :version "24.4"
  :group 'message-interface
  :link '(custom-manual "(message)Resending")
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-forward-ignored-headers "^Content-Transfer-Encoding:\\|^X-Gnus"
  "All headers that match this regexp will be deleted when forwarding a message.
Also see `message-forward-included-headers' -- both variables are applied.
In addition, see `message-forward-included-mime-headers'.

This may also be a list of regexps."
  :version "21.1"
  :group 'message-forwarding
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-forward-included-headers
  '("^From:" "^Subject:" "^Date:" "^To:" "^Cc:")
  "If non-nil, delete non-matching headers when forwarding a message.
Only headers that match this regexp will be included.  This
variable should be a regexp or a list of regexps.

Also see `message-forward-ignored-headers' -- both variables are applied.
In addition, see `message-forward-included-mime-headers'.

When forwarding messages as MIME, but when
`message-forward-show-mml' results in MML not being used,
`message-forward-included-mime-headers' take precedence."
  :version "27.1"
  :group 'message-forwarding
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-forward-included-mime-headers
  '("^Content-Type:" "^MIME-Version:")
  "When forwarding as MIME, but not using MML, don't delete these headers.
Also see `message-forward-ignored-headers' and
`message-forward-ignored-headers'.

When forwarding messages as MIME, but when
`message-forward-show-mml' results in MML not being used,
`message-forward-included-mime-headers' take precedence."
  :version "28.1"
  :group 'message-forwarding
  :type '(repeat :value-to-internal (lambda (widget value)
				      (custom-split-regexp-maybe value))
		 :match (lambda (widget value)
			  (or (stringp value)
			      (widget-editable-list-match widget value)))
		 regexp))

(defcustom message-ignored-cited-headers "."
  "Delete these headers from the messages you yank."
  :group 'message-insertion
  :link '(custom-manual "(message)Insertion Variables")
  :type 'regexp)

(defcustom message-cite-prefix-regexp mail-citation-prefix-regexp
  "Regexp matching the longest possible citation prefix on a line."
  :version "24.1"
  :group 'message-insertion
  :link '(custom-manual "(message)Insertion Variables")
  :type 'regexp
  :set (lambda (symbol value)
	 (prog1
	     (custom-set-default symbol value)
	   (if (boundp 'gnus-message-cite-prefix-regexp)
	       (setq gnus-message-cite-prefix-regexp
		     (concat "^\\(?:" value "\\)"))))))

(defcustom message-cite-level-function (lambda (s) (cl-count ?> s))
  "A function to determine the level of cited text.
The function accepts 1 parameter which is the matched prefix."
  :type 'function
  :version "27.1")

(defcustom message-cancel-message "I am canceling my own article.\n"
  "Message to be inserted in the cancel message."
  :group 'message-interface
  :link '(custom-manual "(message)Canceling News")
  :type 'string)

(defun message-send-mail-function ()
  "Return suitable value for the variable `message-send-mail-function'."
  (declare (obsolete nil "27.1"))
  (require 'sendmail)
  (defvar sendmail-program)
  (cond ((executable-find sendmail-program)
	 #'message-send-mail-with-sendmail)
	((bound-and-true-p smtpmail-default-smtp-server)
	 #'message-smtpmail-send-it)
	(t
	 #'message-send-mail-with-mailclient)))

(defun message-default-send-mail-function ()
  (cond ((eq send-mail-function #'feedmail-send-it) #'feedmail-send-it)
	((eq send-mail-function #'sendmail-query-once) #'sendmail-query-once)
        ((eq send-mail-function #'sendmail-send-it)
         #'message-send-mail-with-sendmail)
	(t #'message-use-send-mail-function)))

(defun message--default-send-mail-function ()
  "Use the setting of `send-mail-function' if applicable."
  (funcall (message-default-send-mail-function)))

;; Useful to set in site-init.el
(defcustom message-send-mail-function #'message--default-send-mail-function
  "Function to call to send the current buffer as mail.
The headers should be delimited by a line whose contents match the
variable `mail-header-separator'.

Valid values include `message-send-mail-with-sendmail'
`message-send-mail-with-mh', `message-send-mail-with-qmail',
`message-smtpmail-send-it', `smtpmail-send-it',
`feedmail-send-it' and `message-send-mail-with-mailclient'.  The
default is system dependent and determined by the function
`message-send-mail-function'.

See also `send-mail-function'."
  :type '(radio (function-item message--default-send-mail-function
		               :tag "Use send-mail-function")
		(function-item message-send-mail-with-sendmail)
		(function-item message-send-mail-with-mh)
		(function-item message-send-mail-with-qmail)
		(function-item message-smtpmail-send-it)
		(function-item smtpmail-send-it)
		(function-item feedmail-send-it)
		(function-item message-send-mail-with-mailclient
			       :tag "Use Mailclient package")
 		(function :tag "Other"))
  :group 'message-sending
  :version "27.1"
  :initialize #'custom-initialize-default
  :link '(custom-manual "(message)Mail Variables")
  :group 'message-mail)

(defcustom message-send-news-function #'message-send-news
  "Function to call to send the current buffer as news.
The headers should be delimited by a line whose contents match the
variable `mail-header-separator'."
  :group 'message-sending
  :group 'message-news
  :link '(custom-manual "(message)News Variables")
  :type 'function)

(defcustom message-reply-to-function #'ignore
  "If non-nil, function that should return a list of headers.
This function should pick out addresses from the To, Cc, and From headers
and respond with new To and Cc headers."
  :group 'message-interface
  :link '(custom-manual "(message)Reply")
  :version "28.1"
  :type 'function)

(defcustom message-wide-reply-to-function #'ignore
  "If non-nil, function that should return a list of headers.
This function should pick out addresses from the To, Cc, and From headers
and respond with new To and Cc headers."
  :group 'message-interface
  :link '(custom-manual "(message)Wide Reply")
  :version "28.1"
  :type 'function)

(defcustom message-followup-to-function #'ignore
  "If non-nil, function that should return a list of headers.
This function should pick out addresses from the To, Cc, and From headers
and respond with new To and Cc headers."
  :group 'message-interface
  :link '(custom-manual "(message)Followup")
  :version "28.1"
  :type 'function)

(defcustom message-extra-wide-headers nil
  "If non-nil, a list of additional address headers.
These are used when composing a wide reply."
  :group 'message-sending
  :type '(repeat string))

(defcustom message-use-followup-to 'ask
  "Specifies what to do with Followup-To header.
If nil, always ignore the header.  If it is t, use its value, but
query before using the \"poster\" value.  If it is the symbol `ask',
always query the user whether to use the value.  If it is the symbol
`use', always use the value."
  :group 'message-interface
  :link '(custom-manual "(message)Followup")
  :type '(choice (const :tag "ignore" nil)
		 (const :tag "use & query" t)
		 (const use)
		 (const ask)))

(defcustom message-use-mail-followup-to 'use
  "Specifies what to do with Mail-Followup-To header.
If nil, always ignore the header.  If it is the symbol `ask', always
query the user whether to use the value.  If it is the symbol `use',
always use the value."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Mailing Lists")
  :type '(choice (const :tag "ignore" nil)
		 (const use)
		 (const ask)))

(defcustom message-subscribed-address-functions nil
  "Specifies functions for determining list subscription.
If nil, do not attempt to determine list subscription with functions.
If non-nil, this variable contains a list of functions which return
regular expressions to match lists.  These functions can be used in
conjunction with `message-subscribed-regexps' and
`message-subscribed-addresses'."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Mailing Lists")
  :type '(repeat sexp))

(defcustom message-subscribed-address-file nil
  "A file containing addresses the user is subscribed to.
If nil, do not look at any files to determine list subscriptions.  If
non-nil, each line of this file should be a mailing list address."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Mailing Lists")
  :type '(radio file (const nil)))

(defcustom message-subscribed-addresses nil
  "Specifies a list of addresses the user is subscribed to.
If nil, do not use any predefined list subscriptions.  This list of
addresses can be used in conjunction with
`message-subscribed-address-functions' and `message-subscribed-regexps'."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Mailing Lists")
  :type '(repeat string))

(defcustom message-subscribed-regexps nil
  "Specifies a list of addresses the user is subscribed to.
If nil, do not use any predefined list subscriptions.  This list of
regular expressions can be used in conjunction with
`message-subscribed-address-functions' and `message-subscribed-addresses'."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Mailing Lists")
  :type '(repeat regexp))

(defcustom message-allow-no-recipients 'ask
  "Specifies what to do when there are no recipients other than Gcc/Fcc.
If it is the symbol `always', the posting is allowed.  If it is the
symbol `never', the posting is not allowed.  If it is the symbol
`ask', you are prompted."
  :version "22.1"
  :group 'message-interface
  :link '(custom-manual "(message)Message Headers")
  :type '(choice (const always)
		 (const never)
		 (const ask)))

(defcustom message-sendmail-f-is-evil
  ;; FIXME: This is related to `mail-specify-envelope-from' but works
  ;; differently (bug#36937).
  nil
  "Non-nil means don't add \"-f username\" to the \"sendmail\" command line.
The \"sendmail\" program has a useful feature to let you set the
envelope FROM address via a command line option, \"-f\".
Unfortunately, it also has a widely disliked default behavior of
disclosing your actual user name anyway by inserting an
unattractive warning in the headers.  It looks something like
this:

  X-Authentication-Warning: u1.example.com: niceguy set
      sender to niceguy@example.com using -f

It is possible to configure \"sendmail\" to not do this, but such a
reconfiguration is not an option for some users.

Note that this user option is mostly useful for actual \"sendmail\"
installations, which are rare these days."
  :group 'message-sending
  :link '(custom-manual "(message)Mail Variables")
  :type 'boolean)

(defcustom message-sendmail-envelope-from
  'obey-mail-envelope-from
  "Envelope-from when sending mail with sendmail.
If this is nil, use `user-mail-address'.  If it is the symbol
`header', use the From: header of the message."
  :version "27.1"
  :type '(choice (string :tag "From name")
		 (const :tag "Use From: header from message" header)
		 (const :tag "Obey `mail-envelope-from'"
		        obey-mail-envelope-from)
		 (const :tag "Use `user-mail-address'" nil))
  :link '(custom-manual "(message)Mail Variables")
  :group 'message-sending)

(defun message--sendmail-envelope-from ()
  (if (eq message-sendmail-envelope-from 'obey-mail-envelope-from)
      (if (boundp 'mail-envelope-from) mail-envelope-from)
    message-sendmail-envelope-from))

(defcustom message-sendmail-extra-arguments nil
  "Additional arguments to `sendmail-program'.
A list of strings, e.g. (\"-a\" \"account\") for msmtp."
  :version "23.1" ;; No Gnus
  :type '(repeat string)
  ;; :link '(custom-manual "(message)Mail Variables")
  :group 'message-sending)

;; qmail-related stuff
(defcustom message-qmail-inject-program "/var/qmail/bin/qmail-inject"
  "Location of the qmail-inject program."
  :group 'message-sending
  :link '(custom-manual "(message)Mail Variables")
  :type 'file)

(defcustom message-qmail-inject-args nil
  "Arguments passed to qmail-inject programs.
This should be a list of strings, one string for each argument.
It may also be a function.

For e.g., if you wish to set the envelope sender address so that bounces
go to the right place or to deal with listserv's usage of that address, you
might set this variable to (\"-f\" \"you@some.where\")."
  :group 'message-sending
  :link '(custom-manual "(message)Mail Variables")
  :type '(choice (function)
		 (repeat string)))

(defvar gnus-post-method)
(defvar gnus-select-method)
(defcustom message-post-method
  (cond ((and (boundp 'gnus-post-method)
	      (listp gnus-post-method)
	      gnus-post-method)
	 gnus-post-method)
	((boundp 'gnus-select-method)
	 gnus-select-method)
	(t '(nnspool "")))
  "Method used to post news.
Note that when posting from inside Gnus, for instance, this
variable isn't used."
  :group 'message-news
  :group 'message-sending
  ;; This should be the `gnus-select-method' widget, but that might
  ;; create a dependence to `gnus.el'.
  :type 'sexp)

(defcustom message-generate-headers-first nil
  "Which headers should be generated before starting to compose a message.
If t, generate all required headers.  This can also be a list of headers to
generate.  The variables `message-required-news-headers' and
`message-required-mail-headers' specify which headers to generate.

Note that the variable `message-deletable-headers' specifies headers which
are to be deleted and then re-generated before sending, so this variable
will not have a visible effect for those headers."
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(choice (const :tag "None" nil)
		 (const :tag "All" t)
		 (repeat (sexp :tag "Header"))))

(defcustom message-fill-column 72
  "Column beyond which automatic line-wrapping should happen.
Local value for message buffers.  If non-nil, also turn on
auto-fill in message buffers."
  :group 'message-various
  ;; :link '(custom-manual "(message)Message Headers")
  :type '(choice (const :tag "Don't turn on auto fill" nil)
		 (integer)))

(defcustom message-setup-hook nil
  "Normal hook, run each time a new outgoing message is initialized.
The function `message-setup' runs this hook."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-cancel-hook nil
  "Hook run when canceling articles."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-signature-setup-hook nil
  "Normal hook, run each time a new outgoing message is initialized.
It is run after the headers have been inserted and before
the signature is inserted."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-mode-hook nil
  "Hook run in message mode buffers."
  :group 'message-various
  :type 'hook)

(defcustom message-header-hook nil
  "Hook run in a message mode buffer narrowed to the headers."
  :group 'message-various
  :type 'hook)

(defcustom message-header-setup-hook nil
  "Hook called narrowed to the headers when setting up a message buffer."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-minibuffer-local-map
  (let ((map (make-sparse-keymap 'message-minibuffer-local-map)))
    (set-keymap-parent map minibuffer-local-map)
    map)
  "Keymap for `message-read-from-minibuffer'."
  ;; FIXME improve type.
  :type '(restricted-sexp :match-alternatives (symbolp keymapp))
  :version "22.1"
  :group 'message-various)

(defcustom message-citation-line-function #'message-insert-citation-line
  "Function called to insert the \"Whomever writes:\" line.

Predefined functions include `message-insert-citation-line' and
`message-insert-formatted-citation-line' (see the variable
`message-citation-line-format').

Note that Gnus provides a feature where the reader can click on
`writes:' to hide the cited text.  If you change this line too much,
people who read your message will have to change their Gnus
configuration.  See the variable `gnus-cite-attribution-suffix'."
  :type '(choice
	  (function-item :tag "plain" message-insert-citation-line)
	  (function-item :tag "formatted" message-insert-formatted-citation-line)
	  (function :tag "Other"))
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-citation-line-format "On %a, %b %d %Y, %N wrote:\n"
  "Format of the \"Whomever writes:\" line.

The string is formatted using `format-spec'.  The following constructs
are replaced:

  %f   The full From, e.g. \"John Doe <john.doe@example.invalid>\".
  %n   The mail address, e.g. \"john.doe@example.invalid\".
  %N   The real name if present, e.g.: \"John Doe\", else fall
       back to the mail address.
  %F   The first name if present, e.g.: \"John\", else fall
       back to the mail address.
  %L   The last name if present, e.g.: \"Doe\".

All other format specifiers are passed to `format-time-string'
which is called using the date from the article your replying to, but
the date in the formatted string will be expressed in the author's
time zone as much as possible.
Extracting the first (%F) and last name (%L) is done heuristically,
so you should always check it yourself.

Please also read the note in the documentation of
`message-citation-line-function'."
  :type '(choice (const :tag "Plain" "%f writes:")
		 (const :tag "Include date" "On %a, %b %d %Y, %n wrote:")
		 string)
  :link '(custom-manual "(message)Insertion Variables")
  :version "23.1" ;; No Gnus
  :group 'message-insertion)

(defcustom message-yank-prefix mail-yank-prefix
  "Prefix inserted on the lines of yanked messages.
Fix `message-cite-prefix-regexp' if it is set to an abnormal value.
See also `message-yank-cited-prefix' and `message-yank-empty-prefix'."
  :version "23.2"
  :type 'string
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-yank-cited-prefix ">"
  "Prefix inserted on cited lines of yanked messages.
Fix `message-cite-prefix-regexp' if it is set to an abnormal value.
See also `message-yank-prefix' and `message-yank-empty-prefix'."
  :version "22.1"
  :type 'string
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-yank-empty-prefix ">"
  "Prefix inserted on empty lines of yanked messages.
See also `message-yank-prefix' and `message-yank-cited-prefix'."
  :version "22.1"
  :type 'string
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-indentation-spaces mail-indentation-spaces
  "Number of spaces to insert at the beginning of each cited line.
Used by `message-yank-original' via `message-yank-cite'."
  :version "23.2"
  :group 'message-insertion
  :link '(custom-manual "(message)Insertion Variables")
  :type 'integer)

(defcustom message-cite-function #'message-cite-original-without-signature
  "Function for citing an original message.
Predefined functions include `message-cite-original' and
`message-cite-original-without-signature'.
Note that these functions use `mail-citation-hook' if that is non-nil."
  :type '(radio (function-item message-cite-original)
		(function-item message-cite-original-without-signature)
		(function-item sc-cite-original)
		(function :tag "Other"))
  :link '(custom-manual "(message)Insertion Variables")
  :version "22.3" ;; Gnus 5.10.12 (changed default)
  :group 'message-insertion)

(defcustom message-indent-citation-function #'message-indent-citation
  "Function for modifying a citation just inserted in the mail buffer.
This can also be a list of functions.  Each function can find the
citation between (point) and (mark t).  And each function should leave
point and mark around the citation text as modified."
  :type 'function
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-signature mail-signature
  "String to be inserted at the end of the message buffer.
If nil, don't insert a signature.
If t, insert `message-signature-file'.
If a function or form, insert its result.
See `mail-signature' for the recommended format of a signature.
Also see `message-signature-insert-empty-line'."
  :version "23.2"
  :type '(choice string
                 (const :tag "None" nil)
                 (const :tag "Contents of signature file" t)
                 function sexp)
  :risky t
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-signature-file mail-signature-file
  "Name of file containing the text inserted at end of message buffer.
Ignored if the named file doesn't exist.
If nil, don't insert a signature.
If a path is specified, the value of `message-signature-directory' is ignored,
even if set."
  :version "23.2"
  :type '(choice file (const :tags "None" nil))
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-signature-directory nil
  "Name of directory containing signature files.
Comes in handy if you have many such files, handled via posting styles for
instance.
If nil, `message-signature-file' is expected to specify the directory if
needed."
  :type '(choice string (const :tags "None" nil))
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-signature-insert-empty-line t
  "If non-nil, insert an empty line before the signature separator."
  :version "22.1"
  :type 'boolean
  :link '(custom-manual "(message)Insertion Variables")
  :group 'message-insertion)

(defcustom message-cite-reply-position 'traditional
  "Where the reply should be positioned.
If `traditional', reply inline.
If `above', reply above quoted text.
If `below', reply below quoted text.

Note: Many newsgroups frown upon nontraditional reply styles.
You probably want to set this variable only for specific groups,
e.g. using `gnus-posting-styles':

  (eval (setq-local message-cite-reply-position \\='above))"
  :version "24.1"
  :type '(choice (const :tag "Reply inline" traditional)
		 (const :tag "Reply above" above)
		 (const :tag "Reply below" below))
  :group 'message-insertion)

(defcustom message-cite-style nil
  "The overall style to be used when yanking cited text.
Value is either nil (no variable overrides) or a let-style list
of pairs (VARIABLE VALUE) that will be bound in
`message-yank-original' to do the quoting.

Presets to impersonate popular mail agents are found in the
message-cite-style-* variables.  This variable is intended for
use in `gnus-posting-styles', such as:

  ((posting-from-work-p) (eval (setq-local message-cite-style
                                           message-cite-style-outlook)))"
  :version "24.1"
  :group 'message-insertion
  :type '(choice (const :tag "Do not override variables" :value nil)
		 (const :tag "MS Outlook" :value message-cite-style-outlook)
		 (const :tag "Mozilla Thunderbird" :value message-cite-style-thunderbird)
		 (const :tag "Gmail" :value message-cite-style-gmail)
		 (variable :tag "User-specified")))

(defconst message-cite-style-outlook
  '((message-cite-function  'message-cite-original)
    (message-citation-line-function  'message-insert-formatted-citation-line)
    (message-cite-reply-position 'above)
    (message-yank-prefix  "")
    (message-yank-cited-prefix  "")
    (message-yank-empty-prefix  "")
    (message-citation-line-format  "\n\n-----------------------\nOn %a, %b %d %Y, %N wrote:\n"))
  "Message citation style used by MS Outlook.  Use with `message-cite-style'.")

(defconst message-cite-style-thunderbird
  '((message-cite-function  'message-cite-original)
    (message-citation-line-function  'message-insert-formatted-citation-line)
    (message-cite-reply-position 'above)
    (message-yank-prefix  "> ")
    (message-yank-cited-prefix  ">")
    (message-yank-empty-prefix  ">")
    (message-citation-line-format "On %D %R %p, %N wrote:"))
  "Message citation style used by Mozilla Thunderbird.
Use with `message-cite-style'.")

(defconst message-cite-style-gmail
  '((message-cite-function  'message-cite-original)
    (message-citation-line-function  'message-insert-formatted-citation-line)
    (message-cite-reply-position 'above)
    (message-yank-prefix  "    ")
    (message-yank-cited-prefix  "    ")
    (message-yank-empty-prefix  "    ")
    (message-citation-line-format "On %e %B %Y %R, %f wrote:\n"))
  "Message citation style used by Gmail.  Use with `message-cite-style'.")

(defcustom message-distribution-function nil
  "Function called to return a Distribution header."
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)News Headers")
  :type '(choice function (const nil)))

(defcustom message-expires 14
  "Number of days before your article expires."
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)News Headers")
  :type 'integer)

(defcustom message-user-path nil
  "If nil, use the NNTP server name in the Path header.
If stringp, use this; if non-nil, use no host name (user name only)."
  :group 'message-news
  :group 'message-headers
  :link '(custom-manual "(message)News Headers")
  :type '(choice (const :tag "nntp" nil)
		 (string :tag "name")
		 (sexp :tag "none" :format "%t" t)))

;; This can be the name of a buffer, or a cons cell (FUNCTION . ARGS)
;; for yanking the original buffer.
(defvar message-reply-buffer nil)
(defvar message-reply-headers nil
  "The headers of the current replied article.
It is a vector of the following headers:
[number subject from date id references chars lines xref extra].")
(defvar message-newsreader nil)
(defvar message-mailer nil)
(defvar message-sent-message-via nil)
(defvar message-checksum nil)
(defvar message-send-actions nil
  "A list of actions to be performed upon successful sending of a message.")
(defvar message-return-action nil
  "Action to return to the caller after sending or postponing a message.")
(defvar message-exit-actions nil
  "A list of actions to be performed upon exiting after sending a message.")
(defvar message-kill-actions nil
  "A list of actions to be performed before killing a message buffer.")
(defvar message-postpone-actions nil
  "A list of actions to be performed after postponing a message.")

(define-widget 'message-header-lines 'text
  "All header lines must be LFD terminated."
  :format "%{%t%}:%n%v"
  :valid-regexp "^\\'"
  :error "All header lines must be newline terminated")

(defcustom message-default-headers ""
  "Header lines to be inserted in outgoing messages.
This can be set to a string containing or a function returning
header lines to be inserted before you edit the message, so you
can edit or delete these lines.  If set to a function, it is
called and its result is inserted."
  :version "23.2"
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(choice
          (message-header-lines :tag "String")
          (function :tag "Function")))

(defcustom message-default-mail-headers
  ;; Ease the transition from mail-mode to message-mode.  See bugs#4431, 5555.
  (concat (if (and (boundp 'mail-default-reply-to)
		   (stringp mail-default-reply-to))
	      (format "Reply-To: %s\n" mail-default-reply-to))
	  (if (and (boundp 'mail-self-blind)
		   mail-self-blind)
	      (format "Bcc: %s\n" user-mail-address))
	  (if (and (boundp 'mail-archive-file-name)
		   (stringp mail-archive-file-name))
	      (format "Fcc: %s\n" mail-archive-file-name))
	  mail-default-headers)
  "A string of header lines to be inserted in outgoing mails."
  :version "23.2"
  :group 'message-headers
  :group 'message-mail
  :link '(custom-manual "(message)Mail Headers")
  :type 'message-header-lines)

(defcustom message-default-news-headers ""
  "A string of header lines to be inserted in outgoing news articles."
  :group 'message-headers
  :group 'message-news
  :link '(custom-manual "(message)News Headers")
  :type 'message-header-lines)

;; Note: could use /usr/ucb/mail instead of sendmail;
;; options -t, and -v if not interactive.
(defcustom message-mailer-swallows-blank-line
  (if (and (string-match "sparc-sun-sunos\\(\\'\\|[^5]\\)"
			 system-configuration)
	   (file-readable-p "/etc/sendmail.cf")
	   (with-temp-buffer
             (insert-file-contents "/etc/sendmail.cf")
             (goto-char (point-min))
             (let ((case-fold-search nil))
               (re-search-forward "^OR\\>" nil t))))
      ;; According to RFC 822 and its successors, the field name must
      ;; consist of printable US-ASCII characters other than colon,
      ;; i.e., decimal 33-56 and 59-126.
      '(looking-at "[ \t]\\|[][!\"#$%&'()*+,./0-9;<=>?@A-Z\\^_`a-z{|}~-]+:"))
  "Set this non-nil if the system's mailer runs the header and body together.
\(This problem exists on Sunos 4 when sendmail is run in remote mode.)
The value should be an expression to test whether the problem will
actually occur."
  :group 'message-sending
  :link '(custom-manual "(message)Mail Variables")
  :risky t
  :type 'sexp)

;;;###autoload
(define-mail-user-agent 'message-user-agent
  'message-mail 'message-send-and-exit
  'message-kill-buffer 'message-send-hook)

(defvar message-mh-deletable-headers '(Message-ID Date Lines Sender)
  "If non-nil, delete the deletable headers before feeding to mh.")

(defvar message-send-method-alist
  '((news message-news-p message-send-via-news)
    (mail message-mail-p message-send-via-mail))
  "Alist of ways to send outgoing messages.
Each element has the form

  (TYPE PREDICATE FUNCTION)

where TYPE is a symbol that names the method; PREDICATE is a function
called without any parameters to determine whether the message is
a message of type TYPE; and FUNCTION is a function to be called if
PREDICATE returns non-nil.  FUNCTION is called with one parameter --
the prefix.")

(defcustom message-mail-alias-type 'abbrev
  "What alias expansion type to use in Message buffers.
The default is `abbrev', which uses mailabbrev.  `ecomplete' uses
an electric completion mode.  nil switches mail aliases off.
This can also be a list of values."
  :group 'message
  :link '(custom-manual "(message)Mail Aliases")
  :type '(choice (const :tag "Use Mailabbrev" abbrev)
		 (const :tag "Use ecomplete" ecomplete)
		 (const :tag "No expansion" nil)))

(defcustom message-self-insert-commands '(self-insert-command)
  "List of `self-insert-command's used to trigger ecomplete.
When one of those commands is invoked to enter a character in To or Cc
header, ecomplete will suggest the candidates of recipients (see also
`message-mail-alias-type').  If you use some tool to enter non-ASCII
text and it replaces `self-insert-command' with the other command, e.g.
`egg-self-insert-command', you may want to add it to this list."
  :group 'message-various
  :type '(repeat function))

(defcustom message-auto-save-directory
  (if (file-writable-p message-directory)
      (file-name-as-directory (expand-file-name "drafts" message-directory))
    "~/")
  "Directory where Message auto-saves buffers if Gnus isn't running.
If nil, Message won't auto-save, whether or not Gnus is running."
  :group 'message-buffers
  :link '(custom-manual "(message)Various Message Variables")
  :type '(choice directory (const :tag "Don't auto-save" nil)))

(defcustom message-default-charset (and (not enable-multibyte-characters)
					'iso-8859-1)
  "Default charset used in non-MULE Emacsen.
If nil, you might be asked to input the charset."
  :version "21.1"
  :group 'message
  :link '(custom-manual "(message)Various Message Variables")
  :type 'symbol)
(make-obsolete-variable
 'message-default-charset
 "The default charset comes from the language environment" "26.1")

(defcustom message-dont-reply-to-names mail-dont-reply-to-names
  "Addresses to prune when doing wide replies.
This can be a regexp, a list of regexps or a predicate function.
Also, a value of nil means exclude `user-mail-address' only.

If a function email is passed as the argument."
  :version "24.3"
  :group 'message
  :link '(custom-manual "(message)Wide Reply")
  :type '(choice (const :tag "Yourself" nil)
		 regexp
		 (repeat :tag "Regexp List" regexp)))

(defsubst message-dont-reply-to-names ()
  (if (functionp message-dont-reply-to-names)
      message-dont-reply-to-names
    (gmm-regexp-concat message-dont-reply-to-names)))

(defcustom message-shoot-gnksa-feet nil
  "A list of GNKSA feet you are allowed to shoot.
Gnus gives you all the opportunity you could possibly want for
shooting yourself in the foot.  Also, Gnus allows you to shoot the
feet of Good Net-Keeping Seal of Approval.  The following are foot
candidates:
`empty-article'     Allow you to post an empty article;
`quoted-text-only'  Allow you to post quoted text only;
`multiple-copies'   Allow you to post multiple copies;
`cancel-messages'   Allow you to cancel or supersede messages from
		    your other email addresses;
`canlock-verify'    Allow you to cancel messages without verifying canlock."
  :group 'message
  :type '(set (const empty-article) (const quoted-text-only)
	      (const multiple-copies) (const cancel-messages)
	      (const canlock-verify)))

(defsubst message-gnksa-enable-p (feature)
  (or (not (listp message-shoot-gnksa-feet))
      (memq feature message-shoot-gnksa-feet)))

(defcustom message-hidden-headers '("^References:" "^Face:" "^X-Face:"
				    "^X-Draft-From:" "^In-Reply-To:")
  "Regexp of headers to be hidden when composing new messages.
This can also be a list of regexps to match headers.  Or a list
starting with `not' and followed by regexps."
  :version "29.1"
  :group 'message
  :link '(custom-manual "(message)Message Headers")
  :type '(choice
	  :format "%{%t%}: %[Value Type%] %v"
	  (regexp :menu-tag "regexp" :format "regexp\n%t: %v")
	  (repeat :menu-tag "(regexp ...)" :format "(regexp ...)\n%v%i"
		  (regexp :format "%t: %v"))
	  (cons :menu-tag "(not regexp ...)" :format "(not regexp ...)\n%v"
		(const not)
		(repeat :format "%v%i"
			(regexp :format "%t: %v")))))

(defcustom message-cite-articles-with-x-no-archive t
  "If non-nil, cite text from articles that has X-No-Archive set."
  :group 'message
  :type 'boolean)

;;; Internal variables.
;;; Well, not really internal.

(defvar message-mode-syntax-table
  (let ((table (copy-syntax-table text-mode-syntax-table)))
    (modify-syntax-entry ?% ". " table)
    (modify-syntax-entry ?> ". " table)
    (modify-syntax-entry ?< ". " table)
    table)
  "Syntax table used while in Message mode.")

(defface message-header-to
  '((((class color)
      (background dark))
     :foreground "DarkOliveGreen1" :bold t)
    (((class color)
      (background light))
     :foreground "MidnightBlue" :bold t)
    (t
     :bold t :italic t))
  "Face used for displaying To headers."
  :group 'message-faces)

(defface message-header-cc
  '((((class color)
      (background dark))
     :foreground "chartreuse1" :bold t)
    (((class color)
      (background light))
     :foreground "MidnightBlue")
    (t
     :bold t))
  "Face used for displaying Cc headers."
  :group 'message-faces)

(defface message-header-subject
  '((((class color)
      (background dark))
     :foreground "OliveDrab1")
    (((class color)
      (background light))
     :foreground "navy blue" :bold t)
    (t
     :bold t))
  "Face used for displaying Subject headers."
  :group 'message-faces)

(defface message-header-newsgroups
  '((((class color)
      (background dark))
     :foreground "yellow" :bold t :italic t)
    (((class color)
      (background light))
     :foreground "blue4" :bold t :italic t)
    (t
     :bold t :italic t))
  "Face used for displaying Newsgroups headers."
  :group 'message-faces)

(defface message-header-other
  '((((class color)
      (background dark))
     :foreground "VioletRed1")
    (((class color)
      (background light))
     :foreground "steel blue")
    (t
     :bold t :italic t))
  "Face used for displaying other headers."
  :group 'message-faces)

(defface message-header-name
  '((((class color)
      (background dark))
     :foreground "green")
    (((class color)
      (background light))
     :foreground "cornflower blue")
    (t
     :bold t))
  "Face used for displaying header names."
  :group 'message-faces)

(defface message-header-xheader
  '((((class color)
      (background dark))
     :foreground "DeepSkyBlue1")
    (((class color)
      (background light))
     :foreground "blue")
    (t
     :bold t))
  "Face used for displaying X-Header headers."
  :group 'message-faces)

(defface message-separator
  '((((class color)
      (background dark))
     :foreground "LightSkyBlue1")
    (((class color)
      (background light))
     :foreground "brown")
    (t
     :bold t))
  "Face used for displaying the separator."
  :group 'message-faces)

(defface message-cited-text-1
  '((((class color)
      (background dark))
     (:foreground "LightPink1"))
    (((class color)
      (background light))
     (:foreground "red1"))
    (t
     (:bold t)))
  "Face used for displaying 1st-level cited text."
  :group 'message-faces)

(defface message-cited-text-2
  '((((class color)
      (background dark))
     (:foreground "forest green"))
    (((class color)
      (background light))
     (:foreground "red4"))
    (t
     (:bold t)))
  "Face used for displaying 2nd-level cited text."
  :group 'message-faces)

(defface message-cited-text-3
  '((((class color)
      (background dark))
     (:foreground "goldenrod3"))
    (((class color)
      (background light))
     (:foreground "OliveDrab4"))
    (t
     (:bold t)))
  "Face used for displaying 3rd-level cited text."
  :group 'message-faces)

(defface message-cited-text-4
  '((((class color)
      (background dark))
     (:foreground "chocolate3"))
    (((class color)
      (background light))
     (:foreground "SteelBlue4"))
    (t
     (:bold t)))
  "Face used for displaying 4th-level cited text."
  :group 'message-faces)

;; backward-compatibility alias
(put 'message-cited-text 'face-alias 'message-cited-text-1)
(put 'message-cited-text 'obsolete-face "26.1")

(defface message-mml
  '((((class color)
      (background dark))
     :foreground "MediumSpringGreen")
    (((class color)
      (background light))
     :foreground "ForestGreen")
    (t
     :bold t))
  "Face used for displaying MML."
  :group 'message-faces)

(defface message-signature-separator '((t :bold t))
  "Face used for displaying the signature separator."
  :group 'message-faces
  :version "28.1")

(defun message-match-to-eoh (_limit)
  (let ((start (point)))
    (rfc822-goto-eoh)
    ;; Typical situation: some temporary change causes the header to be
    ;; incorrect, so EOH comes earlier than intended: the last lines of the
    ;; intended headers are now not considered part of the header any more,
    ;; so they don't have the multiline property set.  When the change is
    ;; completed and the header has its correct shape again, the lack of the
    ;; multiline property means we won't rehighlight the last lines of
    ;; the header.
    (if (< (point) start)
        nil                             ;No header within start..limit.
      ;; Here we disregard LIMIT so that we may extend the area again.
      (set-match-data (list start (point)))
      (point))))

(defun message-font-lock-make-cited-text-matcher (level maxlevel)
  "Generate the matcher for cited text.
LEVEL is the citation level to be matched and MAXLEVEL is the
number of levels specified in the faces `message-cited-text-*'."
  (lambda (limit)
    (let (matched)
      ;; Keep search until `message-cite-level-function' returns the level
      ;; we want to match.
      (while (and (re-search-forward (concat "^\\("
                                             message-cite-prefix-regexp
                                             "\\).*")
                                     limit t)
		  (not (setq matched
                             (save-match-data
                               (= (1- level)
				  (mod
                                   (1- (funcall message-cite-level-function
						(match-string 1)))
                                   maxlevel)))))))
      matched)))

(defvar message-font-lock-keywords
  (nconc
   (let ((content "[ \t]*\\(.+\\(\n[ \t].*\\)*\\)\n?"))
     `((message-match-to-eoh
	(,(concat "^\\([Tt]o:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
	 (1 'message-header-name)
	 (2 'message-header-to nil t))
	(,(concat "^\\(^[GBF]?[Cc][Cc]:\\|^[Rr]eply-[Tt]o:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
	 (1 'message-header-name)
	 (2 'message-header-cc nil t))
	(,(concat "^\\([Ss]ubject:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
	 (1 'message-header-name)
	 (2 'message-header-subject nil t))
	(,(concat "^\\([Nn]ewsgroups:\\|Followup-[Tt]o:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
	 (1 'message-header-name)
	 (2 'message-header-newsgroups nil t))
	(,(concat "^\\(X-[A-Za-z0-9-]+:\\|In-Reply-To:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
	 (1 'message-header-name)
	 (2 'message-header-xheader))
	(,(concat "^\\([A-Z][^: \n\t]+:\\)" content)
	 (progn (goto-char (match-beginning 0)) (match-end 0)) nil
         (1 'message-header-name)
         (2 'message-header-other nil t)))
       (,(lambda (limit)
           (and mail-header-separator
		(not (equal mail-header-separator ""))
		(re-search-forward
                 (concat "^" (regexp-quote mail-header-separator) "$")
                 limit t)))
	0 'message-separator)
       ("<#/?\\(?:multipart\\|part\\|external\\|mml\\|secure\\)[^>]*>"
	0 'message-mml)))
   ;; Additional font locks to highlight different levels of cited text
   (let ((maxlevel 1)
         (level 1)
         cited-text-face
         keywords)
     ;; Compute the max level.
     (while (setq cited-text-face
                  (intern-soft (format "message-cited-text-%d" maxlevel)))
       (setq maxlevel (1+ maxlevel)))
     (setq maxlevel (1- maxlevel))
     ;; Generate the keywords.
     (while (setq cited-text-face
                  (intern-soft (format "message-cited-text-%d" level)))
       (setq keywords
             (cons
              `(,(message-font-lock-make-cited-text-matcher level maxlevel)
                (0 ',cited-text-face))
              keywords))
       (setq level (1+ level)))
     keywords)
   ;; Match signature.  This `field' stuff ensures that hitting `RET'
   ;; after the signature separator doesn't remove the trailing space.
   (list
    '(message--match-signature (0 '( face message-signature-separator
                                     rear-nonsticky t
                                     field signature)))))
  "Additional expressions to highlight in Message mode.")

(defun message--match-signature (limit)
  (save-excursion
    (and (re-search-forward message-signature-separator limit t)
         ;; It's the last one in the buffer.
         (not (save-excursion
                (re-search-forward message-signature-separator nil t))))))

(defvar message-face-alist
  '((bold . message-bold-region)
    (underline . underline-region)
    (default . (lambda (b e)
		 (message-unbold-region b e)
		 (ununderline-region b e))))
  "Alist of mail and news faces for facemenu.
The cdr of each entry is a function for applying the face to a region.")

(defcustom message-send-hook nil
  "Hook run before sending messages.
This hook is run quite early when sending."
  :group 'message-various
  :options '(ispell-message)
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-send-mail-hook nil
  "Hook run before sending mail messages.
This hook is run very late -- just before the message is sent as
mail."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-send-news-hook nil
  "Hook run before sending news messages.
This hook is run very late -- just before the message is sent as
news."
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'hook)

(defcustom message-sent-hook nil
  "Hook run after sending messages."
  :group 'message-various
  :type 'hook)

(defvar message-send-coding-system 'binary
  "Coding system to encode outgoing mail.")

(defvar message-draft-coding-system mm-auto-save-coding-system
  "Coding system to compose mail.")

(defcustom message-send-mail-partially-limit nil
  "The limitation of messages sent as message/partial.
The lower bound of message size in characters, beyond which the message
should be sent in several parts.  If it is nil, the size is unlimited."
  :version "24.1"
  :group 'message-buffers
  :link '(custom-manual "(message)Mail Variables")
  :type '(choice (const :tag "unlimited" nil)
		 (integer 1000000)))

(defcustom message-alternative-emails nil
  "Regexp or predicate function matching alternative email addresses.
The first address in the To, Cc or From headers of the original
article matching this variable is used as the From field of
outgoing messages.

If a function, an email string is passed as the argument.

This variable has precedence over posting styles and anything that runs
off `message-setup-hook'."
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(choice (const :tag "Always use primary" nil)
		 regexp
                 function))

(defcustom message-hierarchical-addresses nil
  "A list of hierarchical mail address definitions.

Inside each entry, the first address is the \"top\" address, and
subsequent addresses are subaddresses; this is used to indicate that
mail sent to the first address will automatically be delivered to the
subaddresses.  So if the first address appears in the recipient list
for a message, the subaddresses will be removed (if present) before
the mail is sent.  All addresses in this structure should be
downcased."
  :version "22.1"
  :group 'message-headers
  :type '(repeat (repeat string)))

(defcustom message-mail-user-agent nil
  "Like `mail-user-agent'.
Except if it is nil, use Gnus native MUA; if it is t, use
`mail-user-agent'."
  :version "22.1"
  :type '(radio (const :tag "Gnus native"
		       :format "%t\n"
		       nil)
		(const :tag "`mail-user-agent'"
		       :format "%t\n"
		       t)
		(function-item :tag "Default Emacs mail"
			       :format "%t\n"
			       sendmail-user-agent)
		(function-item :tag "Emacs interface to MH"
			       :format "%t\n"
			       mh-e-user-agent)
		(function :tag "Other"))
  :version "21.1"
  :group 'message)

(defcustom message-wide-reply-confirm-recipients nil
  "Whether to confirm a wide reply to multiple email recipients.
If this variable is nil, don't ask whether to reply to all recipients.
If this variable is non-nil, pose the question \"Reply to all
recipients?\" before a wide reply to multiple recipients.  If the user
answers yes, reply to all recipients as usual.  If the user answers
no, only reply back to the author."
  :version "22.1"
  :group 'message-headers
  :link '(custom-manual "(message)Wide Reply")
  :type 'boolean)

(defcustom message-user-fqdn nil
  "Domain part of Message-IDs."
  :version "22.1"
  :group 'message-headers
  :link '(custom-manual "(message)News Headers")
  :type '(radio (const :format "%v  " nil)
		(string :format "FQDN: %v")))

(defcustom message-use-idna t
  "Whether to encode non-ASCII in domain names into ASCII according to IDNA."
  :version "26.1"
  :group 'message-headers
  :link '(custom-manual "(message)IDNA")
  :type '(choice (const :tag "Ask" ask)
		 (const :tag "Never" nil)
		 (const :tag "Always" t)))

(defcustom message-generate-hashcash (if (executable-find "hashcash") 'opportunistic)
  "Whether to generate X-Hashcash: headers.
If t, always generate hashcash headers.  If `opportunistic',
only generate hashcash headers if it can be done without the user
waiting (i.e., only asynchronously).

You must have the \"hashcash\" binary installed, see `hashcash-path'."
  :version "24.1"
  :group 'message-headers
  :link '(custom-manual "(message)Mail Headers")
  :type '(choice (const :tag "Always" t)
		 (const :tag "Never" nil)
		 (const :tag "Opportunistic" opportunistic)))

;;; Internal variables.

(defvar message-inhibit-body-encoding nil)
(defvar message-sending-message "Sending...")
(defvar message-buffer-list nil)
(defvar message-this-is-news nil)
(defvar message-this-is-mail nil)
(defvar message-draft-article nil)
(defvar message-mime-part nil)
(defvar message-posting-charset nil)
(defvar message-inserted-headers nil)
(defvar message-inhibit-ecomplete nil)

;; Byte-compiler warning
(defvar gnus-active-hashtb)
(defvar gnus-read-active-file)

;;; Regexp matching the delimiter of messages in UNIX mail format
;;; (UNIX From lines), minus the initial ^.  It should be a copy
;;; of rmail.el's rmail-unix-mail-delimiter.
(defvar message-unix-mail-delimiter
  (let ((time-zone-regexp
	 (concat "\\([A-Z]?[A-Z]?[A-Z][A-Z]\\( DST\\)?"
		 "\\|[-+]?[0-9][0-9][0-9][0-9]"
		 "\\|"
		 "\\) *")))
    (concat
     "From "

     ;; Many things can happen to an RFC 822 (or later) mailbox before it is
     ;; put into a `From' line.  The leading phrase can be stripped, e.g.
     ;; `Joe <@w.x:joe@y.z>' -> `<@w.x:joe@y.z>'.  The <> can be stripped, e.g.
     ;; `<@x.y:joe@y.z>' -> `@x.y:joe@y.z'.  Everything starting with a CRLF
     ;; can be removed, e.g.
     ;;		From: joe@y.z (Joe	K
     ;;			User)
     ;; can yield `From joe@y.z (Joe	K Fri Mar 22 08:11:15 1996', and
     ;;		From: Joe User
     ;;			<joe@y.z>
     ;; can yield `From Joe User Fri Mar 22 08:11:15 1996'.
     ;; The mailbox can be removed or be replaced by white space, e.g.
     ;;		From: "Joe User"{space}{tab}
     ;;			<joe@y.z>
     ;; can yield `From {space}{tab} Fri Mar 22 08:11:15 1996',
     ;; where {space} and {tab} represent the Ascii space and tab characters.
     ;; We want to match the results of any of these manglings.
     ;; The following regexp rejects names whose first characters are
     ;; obviously bogus, but after that anything goes.
     "\\([^\0-\b\n-\r\^?].*\\)?"

     ;; The time the message was sent.
     "\\([^\0-\r \^?]+\\) +"		; day of the week
     "\\([^\0-\r \^?]+\\) +"		; month
     "\\([0-3]?[0-9]\\) +"		; day of month
     "\\([0-2][0-9]:[0-5][0-9]\\(:[0-6][0-9]\\)?\\) *" ; time of day

     ;; Perhaps a time zone, specified by an abbreviation, or by a
     ;; numeric offset.
     time-zone-regexp

     ;; The year.
     " \\([0-9][0-9]+\\) *"

     ;; On some systems the time zone can appear after the year, too.
     time-zone-regexp

     ;; Old uucp cruft.
     "\\(remote from .*\\)?"

     "\n"))
  "Regexp matching the delimiter of messages in UNIX mail format.")

(defvar message-unsent-separator
  (concat "^ *---+ +Unsent message follows +---+ *$\\|"
	  "^ *---+ +Returned message +---+ *$\\|"
	  "^Start of returned message$\\|"
	  "^ *---+ +Original message +---+ *$\\|"
	  "^ *--+ +begin message +--+ *$\\|"
	  "^ *---+ +Original message follows +---+ *$\\|"
	  "^ *---+ +Undelivered message follows +---+ *$\\|"
	  "^------ This is a copy of the message, including all the headers. ------ *$\\|"
	  "^|? *---+ +Message text follows: +---+ *|?$")
  "A regexp that matches the separator before the text of a failed message.")

(defvar message-field-fillers
  '((To message-fill-field-address)
    (Cc message-fill-field-address)
    (From message-fill-field-address))
  "Alist of header names/filler functions.")

(defvar message-header-format-alist
  '((From)
    (Newsgroups)
    (To)
    (Cc)
    (Subject)
    (In-Reply-To)
    (Fcc)
    (Bcc)
    (Date)
    (Organization)
    (Distribution)
    (Lines)
    (Expires)
    (Message-ID)
    (References . message-shorten-references)
    (User-Agent))
  "Alist used for formatting headers.")

(defvar-local message-options nil
  "Some saved answers when sending message.")

(defvar message-send-mail-real-function nil
  "Internal send mail function.")

(defvar message-bogus-system-names "\\`localhost\\.\\|\\.local\\'"
  "The regexp of bogus system names.")

(defvar message-encoded-mail-cache nil
  "After sending a message, the encoded version is cached in this variable.")

(autoload 'gnus-alive-p "gnus-util")
(autoload 'gnus-delay-article "gnus-delay")
(autoload 'gnus-extract-address-components "gnus-util")
(autoload 'gnus-find-method-for-group "gnus")
(autoload 'gnus-get-buffer-create "gnus")
(autoload 'gnus-group-name-charset "gnus-group")
(autoload 'gnus-group-name-decode "gnus-group")
(autoload 'gnus-groups-from-server "gnus")
(autoload 'gnus-open-server "gnus-int")
(autoload 'gnus-output-to-mail "gnus-util")
(autoload 'gnus-output-to-rmail "gnus-rmail")
(autoload 'gnus-request-post "gnus-int")
(autoload 'gnus-server-string "gnus")
(autoload 'message-setup-toolbar "messagexmas")
(autoload 'mh-new-draft-name "mh-comp")
(autoload 'mh-send-letter "mh-comp")
(autoload 'nndraft-request-associate-buffer "nndraft")
(autoload 'nndraft-request-expire-articles "nndraft")
(autoload 'nnvirtual-find-group-art "nnvirtual")
(autoload 'rmail-msg-is-pruned "rmail")
(autoload 'rmail-output "rmailout")

(defun message-kill-all-overlays ()
  (mapcar #'delete-overlay (overlays-in (point-min) (point-max))))

\f

;;;
;;; Utility functions.
;;;

(defmacro message-y-or-n-p (question show &rest text)
  "Ask QUESTION, displaying remaining args in a temporary buffer if SHOW."
  `(message-talkative-question 'y-or-n-p ,question ,show ,@text))

(defsubst message-delete-line (&optional n)
  "Delete the current line (and the next N lines)."
  (declare (obsolete delete-line "29.1"))
  (delete-region (progn (beginning-of-line) (point))
		 (progn (forward-line (or n 1)) (point))))

(defun message-mark-active-p ()
  "Non-nil means the mark and region are currently active in this buffer."
  (declare (obsolete mark-active "29.1"))
  mark-active)

(defun message-unquote-tokens (elems)
  "Remove double quotes (\") from strings in list ELEMS."
  (mapcar (lambda (item)
	    (while (string-match "^\\(.*\\)\"\\(.*\\)$" item)
	      (setq item (concat (match-string 1 item)
				 (match-string 2 item))))
	    item)
	  elems))

(defun message-tokenize-header (header &optional separator)
  "Split HEADER into a list of header elements.
SEPARATOR is a string of characters to be used as separators.  \",\"
is used by default."
  (if (not header)
      nil
    (let ((regexp (format "[%s]+" (or separator ",")))
	  (first t)
	  beg quoted elems paren)
      (with-temp-buffer
	(mm-enable-multibyte)
	(setq beg (point-min))
	(insert header)
	(goto-char (point-min))
	(while (not (eobp))
	  (if first
	      (setq first nil)
	    (forward-char 1))
	  (cond ((and (> (point) beg)
		      (or (eobp)
			  (and (looking-at regexp)
			       (not quoted)
			       (not paren))))
		 (push (buffer-substring beg (point)) elems)
		 (setq beg (match-end 0)))
		((eq (char-after) ?\")
		 (setq quoted (not quoted)))
		((and (eq (char-after) ?\()
		      (not quoted))
		 (setq paren t))
		((and (eq (char-after) ?\))
		      (not quoted))
		 (setq paren nil))))
	(nreverse elems)))))

(autoload 'nnheader-insert-file-contents "nnheader")

(defun message-mail-file-mbox-p (file)
  "Say whether FILE looks like a Unix mbox file."
  (when (and (file-exists-p file)
	     (file-readable-p file)
	     (file-regular-p file))
    (with-temp-buffer
      (nnheader-insert-file-contents file)
      (goto-char (point-min))
      (looking-at message-unix-mail-delimiter))))

(defun message-fetch-field (header &optional first)
  "Return the value of the header field named HEADER.
Continuation lines are folded (i.e., newlines are removed).
Surrounding whitespace is also removed.

By default, if there's more than one header field named HEADER,
all the values are returned as one concatenated string, and
values are comma-separated.

If FIRST is non-nil, only the first value is returned.

The buffer is expected to be narrowed to just the header of the message;
see `message-narrow-to-headers-or-head'."
  (let* ((value (mail-fetch-field header nil (not first))))
    (when value
      (while (string-match "\n[\t ]+" value)
	(setq value (replace-match " " t t value)))
      ;; If the initial or final line is blank (just a newline), then
      ;; we have initial or trailing white space; remove it.
      (string-trim value))))

(defun message-field-value (header &optional first)
  "The same as `message-fetch-field', only narrow to the headers first."
  (save-excursion
    (save-restriction
      (message-narrow-to-headers-or-head)
      (message-fetch-field header first))))

(defun message-narrow-to-field ()
  "Narrow the buffer to the header on the current line."
  (beginning-of-line)
  (while (looking-at "[ \t]")
    (forward-line -1))
  (narrow-to-region
   (point)
   (progn
     (forward-line 1)
     (if (re-search-forward "^[^ \n\t]" nil t)
         (line-beginning-position)
       (point-max))))
  (goto-char (point-min)))

(defun message-add-header (&rest headers)
  "Add the HEADERS to the message header, skipping those already present."
  (while headers
    (let (hclean)
      (unless (string-match "^\\([^:]+\\):[ \t]*[^ \t]" (car headers))
	(error "Invalid header `%s'" (car headers)))
      (setq hclean (match-string 1 (car headers)))
      (save-restriction
	(message-narrow-to-headers)
	(unless (re-search-forward (concat "^" (regexp-quote hclean) ":") nil t)
	  (goto-char (point-max))
	  (if (string-match "\n$" (car headers))
	      (insert (car headers))
	    (insert (car headers) ?\n)))))
    (setq headers (cdr headers))))

(defmacro message-with-reply-buffer (&rest forms)
  "Evaluate FORMS in the reply buffer, if it exists."
  (declare (indent 0) (debug t))
  `(when (buffer-live-p message-reply-buffer)
     (with-current-buffer message-reply-buffer
       ,@forms)))

(defun message-fetch-reply-field (header)
  "Fetch field HEADER from the message we're replying to."
  (message-with-reply-buffer
    (save-restriction
      (mail-narrow-to-head)
      (message-fetch-field header))))

(defun message-strip-list-identifiers (subject)
  "Remove list identifiers in `gnus-list-identifiers' from string SUBJECT."
  (require 'gnus-sum)			; for gnus-list-identifiers
  (let ((regexp (if (stringp gnus-list-identifiers)
		    gnus-list-identifiers
		  (mapconcat #'identity gnus-list-identifiers " *\\|"))))
    (if (and (not (equal regexp ""))
             (string-match (concat "\\(\\(\\(Re: +\\)?\\(" regexp
                                   " *\\)\\)+\\(Re: +\\)?\\)")
                           subject))
	(concat (substring subject 0 (match-beginning 1))
		(or (match-string 3 subject)
		    (match-string 5 subject))
		(substring subject
			   (match-end 1)))
      subject)))

(defun message-strip-subject-re (subject)
  "Remove \"Re:\" from subject lines in string SUBJECT."
  (if (string-match message-subject-re-regexp subject)
      (substring subject (match-end 0))
    subject))

(defcustom message-replacement-char "."
  "Replacement character used instead of unprintable or not decodable chars."
  :group 'message-various
  :version "22.1" ;; Gnus 5.10.9
  :type '(choice string
		 (const ".")
		 (const "?")))

;; FIXME: We also should call `message-strip-subject-encoded-words'
;; when forwarding.  Probably in `message-make-forward-subject' and
;; `message-forward-make-body'.

(defun message-strip-subject-encoded-words (subject)
  "Fix non-decodable words in SUBJECT."
  ;; Cf. `gnus-simplify-subject-fully'.
  (let* ((case-fold-search t)
	 (replacement-chars (format "[%s%s%s]"
				    message-replacement-char
				    message-replacement-char
				    message-replacement-char))
	 (enc-word-re "=\\?\\([^?]+\\)\\?\\([QB]\\)\\?\\([^?]+\\)\\(\\?=\\)")
	 cs-string
	 (have-marker
	  (with-temp-buffer
	    (insert subject)
	    (goto-char (point-min))
	    (when (re-search-forward enc-word-re nil t)
	      (setq cs-string (match-string 1)))))
	 cs-coding q-or-b word-beg word-end)
    (if (or (not have-marker) ;; No encoded word found...
	    ;; ... or double encoding was correct:
	    (and (stringp cs-string)
		 (setq cs-string (downcase cs-string))
		 (mm-coding-system-p (intern cs-string))
		 (not (prog1
			  (y-or-n-p
			   (format "\
Decoded Subject \"%s\"
contains a valid encoded word.  Decode again? "
				   subject))
			(setq cs-coding (intern cs-string))))))
	subject
      (with-temp-buffer
	(insert subject)
	(goto-char (point-min))
	(while (re-search-forward enc-word-re nil t)
	  (setq cs-string (downcase (match-string 1))
		q-or-b    (match-string 2)
		word-beg (match-beginning 0)
		word-end (match-end 0))
	  (setq cs-coding
		(if (mm-coding-system-p (intern cs-string))
		    (setq cs-coding (intern cs-string))
		  nil))
	  ;; No double encoded subject? => bogus charset.
	  (unless cs-coding
	    (setq cs-coding
		  (read-coding-system
		   (format-message "\
Decoded Subject \"%s\"
contains an encoded word.  The charset `%s' is unknown or invalid.
Hit RET to replace non-decodable characters with \"%s\" or enter replacement
charset: "
			   subject cs-string message-replacement-char)))
	    (if cs-coding
		(replace-match (concat "=?" (symbol-name cs-coding)
				       "?\\2?\\3\\4\\5"))
	      (save-excursion
		(goto-char word-beg)
		(re-search-forward "=\\?\\([^?]+\\)\\?\\([QB]\\)\\?" word-end t)
		(replace-match "")
		;; QP or base64
		(if (string-match "\\`Q\\'" q-or-b)
		    ;; QP
		    (progn
		      (message "Replacing non-decodable characters with \"%s\"."
			       message-replacement-char)
		      (while (re-search-forward "\\(=[A-F0-9][A-F0-9]\\)+"
						word-end t)
			(replace-match message-replacement-char)))
		  ;; base64
		  (message "Replacing non-decodable characters with \"%s\"."
			   replacement-chars)
		  (re-search-forward "[^?]+" word-end t)
		  (replace-match replacement-chars))
		(re-search-forward "\\?=")
		(replace-match "")))))
	(rfc2047-decode-region (point-min) (point-max))
	(buffer-string)))))

;;; Start of functions adopted from `message-utils.el'.

(defun message-strip-subject-trailing-was (subject)
  "Remove trailing \"(was: <old subject>)\" from SUBJECT lines.
Leading \"Re: \" is not stripped by this function.  Use the function
`message-strip-subject-re' for this."
  (or
   (let ((query message-subject-trailing-was-query) new)
     (and query
          (string-match (if (eq query 'ask)
                            message-subject-trailing-was-ask-regexp
                          message-subject-trailing-was-regexp)
                        subject)
          (setq new (substring subject 0 (match-beginning 0)))
          (or (not (eq query 'ask))
              (message-y-or-n-p
               "Strip `(was: <old subject>)' in subject? " t
               (concat
                "Strip `(was: <old subject>)' in subject "
                "and use the new one instead?\n\n"
                "Current subject is:   \"" subject "\"\n\n"
                "New subject would be: \"" new "\"\n\n"
                "See the variable `message-subject-trailing-was-query' "
                "to get rid of this query.")))
          new))
   subject))

;;; Suggested by Jonas Steverud  @  www.dtek.chalmers.se/~d4jonas/

(defun message-change-subject (new-subject)
  "Ask for NEW-SUBJECT header, append (was: <Old Subject>)."
  (interactive
   (list
    (read-from-minibuffer "New subject: "))
   message-mode)
  (cond ((and (not (or (null new-subject) ; new subject not empty
		       (zerop (string-width new-subject))
		       (string-match "^[ \t]*$" new-subject))))
	 (save-excursion
	   (let ((old-subject
		  (save-restriction
		    (message-narrow-to-headers)
		    (message-fetch-field "Subject"))))
	     (cond ((not old-subject)
		    (error "No current subject"))
		   ((not (string-match
			  (concat "^[ \t]*"
				  (regexp-quote new-subject)
				  "[ \t]*$")
			  old-subject))  ; yes, it really is a new subject
		    ;; delete eventual Re: prefix
		    (setq old-subject
			  (message-strip-subject-re old-subject))
		    (message-goto-subject)
		    (delete-line)
		    (insert (concat "Subject: "
				    new-subject
				    " (was: "
				    old-subject ")\n")))))))))

(defun message-mark-inserted-region (beg end &optional verbatim)
  "Mark some region in the current article with enclosing tags.
See `message-mark-insert-begin' and `message-mark-insert-end'.
If VERBATIM, use slrn style verbatim marks (\"#v+\" and \"#v-\")."
  (interactive "r\nP" message-mode)
  (save-excursion
    ;; add to the end of the region first, otherwise end would be invalid
    (goto-char end)
    (unless (bolp)
      (insert "\n"))
    (insert (if verbatim "#v-\n" message-mark-insert-end))
    (goto-char beg)
    (insert (if verbatim "#v+\n" message-mark-insert-begin))))

(defun message-mark-insert-file (file &optional verbatim)
  "Insert FILE at point, marking it with enclosing tags.
See `message-mark-insert-begin' and `message-mark-insert-end'.
If VERBATIM, use slrn style verbatim marks (\"#v+\" and \"#v-\")."
  (interactive "fFile to insert: \nP" message-mode)
    ;; reverse insertion to get correct result.
  (let ((p (point)))
    (insert (if verbatim "#v-\n" message-mark-insert-end))
    (goto-char p)
    (insert-file-contents file)
    (goto-char p)
    (insert (if verbatim "#v+\n" message-mark-insert-begin))))

(defun message-add-archive-header ()
  "Insert \"X-No-Archive: Yes\" in the header and a note in the body.
The note can be customized using `message-archive-note'.  When called with a
prefix argument, ask for a text to insert.  If you don't want the note in the
body, set  `message-archive-note' to nil."
  (interactive nil message-mode)
  (if current-prefix-arg
      (setq message-archive-note
	    (read-from-minibuffer "Reason for No-Archive: "
				  (cons message-archive-note 0))))
    (save-excursion
      (if (message-goto-signature)
	  (re-search-backward message-signature-separator))
      (when message-archive-note
	(insert message-archive-note)
	(newline))
      (message-add-header message-archive-header)
      (message-sort-headers)))

(defun message-cross-post-followup-to-header (target-group)
  "Mangles FollowUp-To and Newsgroups header to point to TARGET-GROUP.
With prefix-argument just set Follow-Up, don't cross-post."
  (interactive
   (list				; Completion based on Gnus
    (replace-regexp-in-string
     "\\`.*:" ""
     (completing-read "Followup To: "
		      (if (boundp 'gnus-newsrc-alist)
			  gnus-newsrc-alist)
		      nil nil '("poster" . 0)
		      (if (boundp 'gnus-group-history)
			  'gnus-group-history))))
   message-mode)
  (message-remove-header "Follow[Uu]p-[Tt]o" t)
  (message-goto-newsgroups)
  (beginning-of-line)
  ;; if we already did a crosspost before, kill old target
  (if (and message-cross-post-old-target
	   (re-search-forward
	    (regexp-quote (concat "," message-cross-post-old-target))
	    nil t))
      (replace-match ""))
  ;; unless (followup is to poster or user explicitly asked not
  ;; to cross-post, or target-group is already in Newsgroups)
  ;; add target-group to Newsgroups line.
  (cond ((and (or
	       ;; def: cross-post, req:no
	       (and message-cross-post-default (not current-prefix-arg))
	       ;; def: no-cross-post, req:yes
	       (and (not message-cross-post-default) current-prefix-arg))
	      (not (string-match "poster" target-group))
	      (not (string-match (regexp-quote target-group)
				 (message-fetch-field "Newsgroups"))))
	 (end-of-line)
	 (insert (concat "," target-group))))
  (end-of-line) ; ensure Followup: comes after Newsgroups:
  ;; unless new followup would be identical to Newsgroups line
  ;; make a new Followup-To line
  (if (not (string-match (concat "^[ \t]*"
				 target-group
				 "[ \t]*$")
			 (message-fetch-field "Newsgroups")))
      (insert (concat "\nFollowup-To: " target-group)))
  (setq message-cross-post-old-target target-group))

(defun message-cross-post-insert-note (target-group cross-post in-old
						    _old-groups)
  "Insert a in message body note about a set Followup or Crosspost.
If there have been previous notes, delete them.  TARGET-GROUP specifies the
group to Followup-To.  When CROSS-POST is t, insert note about
crossposting.  IN-OLD specifies whether TARGET-GROUP is a member of
OLD-GROUPS.  OLD-GROUPS lists the old-groups the posting would have
been made to before the user asked for a Crosspost."
  ;; start scanning body for previous uses
  (message-goto-signature)
  (let ((head (re-search-backward
	       (concat "^" mail-header-separator)
	       nil t))) ; just search in body
    (message-goto-signature)
    (while (re-search-backward
	    (concat "^" (regexp-quote message-cross-post-note) ".*")
	    head t)
      (delete-line))
    (message-goto-signature)
    (while (re-search-backward
	    (concat "^" (regexp-quote message-followup-to-note) ".*")
	    head t)
      (delete-line))
    ;; insert new note
    (if (message-goto-signature)
	(re-search-backward message-signature-separator))
    (if (or in-old
	    (not cross-post)
	    (string-match "^[ \t]*poster[ \t]*$" target-group))
	(insert (concat message-followup-to-note target-group "\n"))
      (insert (concat message-cross-post-note target-group "\n")))))

(defun message-cross-post-followup-to (target-group)
  "Crossposts message and set Followup-To to TARGET-GROUP.
With prefix-argument just set Follow-Up, don't cross-post."
  (interactive
   (list				; Completion based on Gnus
    (replace-regexp-in-string
     "\\`.*:" ""
     (completing-read "Followup To: "
		      (if (boundp 'gnus-newsrc-alist)
			  gnus-newsrc-alist)
		      nil nil '("poster" . 0)
		      (if (boundp 'gnus-group-history)
			  'gnus-group-history))))
   message-mode)
  (when (fboundp 'gnus-group-real-name)
    (setq target-group (gnus-group-real-name target-group)))
  (cond ((not (or (null target-group) ; new subject not empty
		  (zerop (string-width target-group))
		  (string-match "^[ \t]*$" target-group)))
	 (save-excursion
	   (let* ((old-groups (message-fetch-field "Newsgroups"))
		  (in-old (string-match
			   (regexp-quote target-group)
			   (or old-groups ""))))
	     ;; check whether target exactly matches old Newsgroups
	     (cond ((not old-groups)
		    (error "No current newsgroup"))
		   ((or (not in-old)
			(not (string-match
			      (concat "^[ \t]*"
				      (regexp-quote target-group)
				      "[ \t]*$")
			      old-groups)))
		    ;; yes, Newsgroups line must change
		    (message-cross-post-followup-to-header target-group)
		    ;; insert note whether we do cross-post or followup-to
		    (funcall message-cross-post-note-function
			     target-group
			     (if (or (and message-cross-post-default
					  (not current-prefix-arg))
				     (and (not message-cross-post-default)
					  current-prefix-arg)) t)
			     in-old old-groups))))))))

;;; Reduce To: to Cc: or Bcc: header

(defun message-reduce-to-to-cc ()
 "Replace contents of To: header with contents of Cc: or Bcc: header."
 (interactive nil message-mode)
 (let ((cc-content
	(save-restriction (message-narrow-to-headers)
			  (message-fetch-field "cc")))
       (bcc nil))
   (if (and (not cc-content)
	    (setq cc-content
		  (save-restriction
		    (message-narrow-to-headers)
		    (message-fetch-field "bcc"))))
       (setq bcc t))
   (cond (cc-content
	  (save-excursion
	    (message-goto-to)
	    (delete-line)
	    (insert (concat "To: " cc-content "\n"))
	    (save-restriction
	      (message-narrow-to-headers)
	      (message-remove-header (if bcc
					 "bcc"
				       "cc"))))))))

;;; End of functions adopted from `message-utils.el'.

(defun message-remove-header (header &optional is-regexp first reverse)
  "Remove HEADER in the narrowed buffer.
If IS-REGEXP, HEADER is a regular expression.
If FIRST, only remove the first instance of the header.
If REVERSE, remove headers that doesn't match HEADER.
Return the number of headers removed."
  (goto-char (point-min))
  (let ((regexp (if is-regexp header (concat "^" (regexp-quote header) ":")))
	(number 0)
	(case-fold-search t)
	last)
    (while (and (not (eobp))
		(not last))
      (if (if reverse
	      (and (not (looking-at regexp))
		   ;; Don't remove things not looking like header.
		   (looking-at "[!-9;-~]+:"))
	    (looking-at regexp))
	  (progn
	    (cl-incf number)
	    (when first
	      (setq last t))
	    (delete-region
	     (point)
	     ;; There might be a continuation header, so we have to search
	     ;; until we find a new non-continuation line.
	     (progn
	       (forward-line 1)
	       (if (re-search-forward "^[^ \t]" nil t)
		   (goto-char (match-beginning 0))
		 (point-max)))))
	(forward-line 1)
	(if (re-search-forward "^[^ \t]" nil t)
	    (goto-char (match-beginning 0))
	  (goto-char (point-max)))))
    number))

(defun message-remove-first-header (header)
  "Remove the first instance of HEADER if there is more than one."
  (let ((count 0)
	(regexp (concat "^" (regexp-quote header) ":")))
    (save-excursion
      (goto-char (point-min))
      (while (re-search-forward regexp nil t)
	(cl-incf count)))
    (while (> count 1)
      (message-remove-header header nil t)
      (cl-decf count))))

(defun message-narrow-to-headers ()
  "Narrow the buffer to the head of the message."
  (widen)
  (narrow-to-region
   (goto-char (point-min))
   (if (re-search-forward
	(concat "^" (regexp-quote mail-header-separator) "\n") nil t)
       (match-beginning 0)
     (point-max)))
  (goto-char (point-min)))

(defun message-narrow-to-head-1 ()
  "Like `message-narrow-to-head'.  Don't widen."
  (narrow-to-region
   (goto-char (point-min))
   (if (search-forward "\n\n" nil 1)
       (1- (point))
     (point-max)))
  (goto-char (point-min)))

;; FIXME: clarify difference: message-narrow-to-head,
;; message-narrow-to-headers-or-head, message-narrow-to-headers
(defun message-narrow-to-head ()
  "Narrow the buffer to the head of the message.
Point is left at the beginning of the narrowed-to region."
  (widen)
  (message-narrow-to-head-1))

(defun message-narrow-to-headers-or-head ()
  "Narrow the buffer to the head of the message."
  (widen)
  (narrow-to-region
   (goto-char (point-min))
   (if (re-search-forward (concat "\\(\n\\)\n\\|^\\("
				  (regexp-quote mail-header-separator)
				  "\n\\)")
			  nil t)
       (or (match-end 1) (match-beginning 2))
     (point-max)))
  (goto-char (point-min)))

(defun message-news-p ()
  "Say whether the current buffer contains a news message."
  (and (not message-this-is-mail)
       (or message-this-is-news
	   (save-excursion
	     (save-restriction
	       (message-narrow-to-headers)
	       (and (message-fetch-field "newsgroups")
		    (not (message-fetch-field "posted-to"))))))))

(defun message-mail-p ()
  "Say whether the current buffer contains a mail message."
  (and (not message-this-is-news)
       (or message-this-is-mail
	   (save-excursion
	     (save-restriction
	       (message-narrow-to-headers)
	       (or (message-fetch-field "to")
		   (message-fetch-field "cc")
		   (message-fetch-field "bcc")))))))

(defun message-subscribed-p ()
  "Say whether we need to insert a MFT header."
  (or message-subscribed-regexps
      message-subscribed-addresses
      message-subscribed-address-file
      message-subscribed-address-functions))

(defun message-next-header ()
  "Go to the beginning of the next header."
  (beginning-of-line)
  (or (eobp) (forward-char 1))
  (not (if (re-search-forward "^[^ \t]" nil t)
	   (beginning-of-line)
	 (goto-char (point-max)))))

(defun message-sort-headers-1 ()
  "Sort the buffer as headers using `message-rank' text props."
  (goto-char (point-min))
  (require 'sort)
  (sort-subr
   nil 'message-next-header
   (lambda ()
     (message-next-header)
     (unless (bobp)
       (forward-char -1)))
   (lambda ()
     (or (get-text-property (point) 'message-rank)
	 10000))))

(defun message-sort-headers ()
  "Sort headers of the current message according to `message-header-format-alist'."
  (interactive nil message-mode)
  (save-excursion
    (save-restriction
      (let ((max (1+ (length message-header-format-alist))))
	(message-narrow-to-headers)
	(while (re-search-forward "^[^ \n]+:" nil t)
	  (put-text-property
	   (match-beginning 0) (1+ (match-beginning 0))
	   'message-rank
           (- max (length
                   (memq (assq (intern (buffer-substring
					(match-beginning 0) (1- (match-end 0))))
			       message-header-format-alist)
			 message-header-format-alist))))))
      (message-sort-headers-1))))

(defun message-kill-address ()
  "Kill the address under point."
  (interactive nil message-mode)
  (let ((start (point)))
    (message-skip-to-next-address)
    (kill-region start (if (bolp) (1- (point)) (point)))))


(autoload 'Info-goto-node "info")
(defvar mml2015-use)

(defun message-info (&optional arg)
  "Display the Message manual.

Prefixed with one \\[universal-argument], display the Emacs MIME
manual.  With two \\[universal-argument]'s, display the EasyPG or
PGG manual, depending on the value of `mml2015-use'."
  (interactive "p")
  (info (format "(%s)Top"
		(cond ((eq arg 16)
		       (require 'mml2015)
		       mml2015-use)
		      ((eq arg  4) 'emacs-mime)
		      ((and (not (booleanp arg))
			    (symbolp arg))
		       arg)
		      (t
		       'message)))))

(defun message-all-recipients ()
  "Return a list of all recipients in the message, looking at TO, Cc and Bcc.

Each recipient is in the format of `mail-extract-address-components'."
  (mapcan (lambda (header)
            (let ((header-value (message-fetch-field header)))
              (and
               header-value
               (mail-extract-address-components header-value t))))
          '("To" "Cc" "Bcc")))

(defun message-all-epg-keys-available-p ()
  "Return non-nil if the pgp keyring has a public key for each recipient."
  (require 'epa)
  (let ((context (epg-make-context epa-protocol)))
    (catch 'break
      (dolist (recipient (message-all-recipients))
        (let ((recipient-email (cadr recipient)))
          (when (and recipient-email (not (epg-list-keys context recipient-email)))
            (throw 'break nil))))
      t)))

(defun message-sign-encrypt-if-all-keys-available ()
  "Add MML tag to encrypt message when there is a key for each recipient.

Consider adding this function to `message-send-hook' to
systematically send encrypted emails when possible."
  (when (message-all-epg-keys-available-p)
    (mml-secure-message-sign-encrypt)))

(defcustom message-openpgp-header nil
  "Specification for the \"OpenPGP\" header of outgoing messages.

The value must be a list of three elements, all strings:
- Key ID, in hexadecimal form;
- Key URL or ASCII armoured key; and
- Protection preference, one of: \"unprotected\", \"sign\",
  \"encrypt\" or \"signencrypt\".

Each of the elements may be nil, in which case its part in the
OpenPGP header will be left out.  If all the values are nil,
or `message-openpgp-header' is itself nil, the OpenPGP header
will not be inserted."
  :type '(choice
	  (const :tag "Don't add OpenPGP header" nil)
	  (list :tag "Use OpenPGP header"
		(choice (string :tag "ID")
			(const :tag "No ID" nil))
		(choice (string :tag "Key")
			(const :tag "No Key" nil))
		(choice (other :tag "None" nil)
			(const :tag "Unprotected" "unprotected")
			(const :tag "Sign" "sign")
			(const :tag "Encrypt" "encrypt")
			(const :tag "Sign and Encrypt" "signencrypt"))))
  :version "28.1")

(defun message-add-openpgp-header ()
  "Add OpenPGP header to point to public key.

Header will be constructed as specified in `message-openpgp-header'.

Consider adding this function to `message-header-setup-hook'"
  ;; See https://tools.ietf.org/html/draft-josefsson-openpgp-mailnews-header
  (when (and message-openpgp-header
	     (or (nth 0 message-openpgp-header)
		 (nth 1 message-openpgp-header)
		 (nth 2 message-openpgp-header)))
    (message-add-header
     (with-temp-buffer
       (insert "OpenPGP: ")
       ;; add ID
       (let (need-sep)
	 (when (nth 0 message-openpgp-header)
	   (insert "id=" (nth 0 message-openpgp-header))
	   (setq need-sep t))
	 ;; add URL
	 (when (nth 1 message-openpgp-header)
	   (when need-sep (insert "; "))
	   (insert "url=\"" (nth 1 message-openpgp-header) "\"")
	   (setq need-sep t))
	 ;; add preference
	 (when (nth 2 message-openpgp-header)
	   (when need-sep (insert "; "))
	   (insert "preference=" (nth 2 message-openpgp-header))))
       ;; insert header
       (buffer-string)))
    (message-sort-headers)))

\f

;;;
;;; Message mode
;;;

;;; Set up keymap.

(defvar-keymap message-mode-map
  :full t :parent text-mode-map
  :doc "Message Mode keymap."
  "C-c ?" #'describe-mode

  "C-c C-f C-t" #'message-goto-to
  "C-c C-f C-o" #'message-goto-from
  "C-c C-f C-b" #'message-goto-bcc
  "C-c C-f C-w" #'message-goto-fcc
  "C-c C-f C-c" #'message-goto-cc
  "C-c C-f C-s" #'message-goto-subject
  "C-c C-f C-r" #'message-goto-reply-to
  "C-c C-f C-n" #'message-goto-newsgroups
  "C-c C-f C-d" #'message-goto-distribution
  "C-c C-f C-f" #'message-goto-followup-to
  "C-c C-f C-m" #'message-goto-mail-followup-to
  "C-c C-f C-k" #'message-goto-keywords
  "C-c C-f C-u" #'message-goto-summary
  "C-c C-f C-i" #'message-insert-or-toggle-importance
  "C-c C-f C-a" #'message-generate-unsubscribed-mail-followup-to

  ;; modify headers (and insert notes in body)
  "C-c C-f s"    #'message-change-subject
  ;;
  "C-c C-f x"    #'message-cross-post-followup-to
  ;; prefix+message-cross-post-followup-to = same w/o cross-post
  "C-c C-f t"    #'message-reduce-to-to-cc
  "C-c C-f a"    #'message-add-archive-header
  ;; mark inserted text
  "C-c M-m" #'message-mark-inserted-region
  "C-c M-f" #'message-mark-insert-file

  "C-c C-b" #'message-goto-body
  "C-c C-i" #'message-goto-signature

  "C-c C-t" #'message-insert-to
  "C-c C-f w" #'message-insert-wide-reply
  "C-c C-n" #'message-insert-newsgroups
  "C-c C-l" #'message-to-list-only
  "C-c C-f C-e" #'message-insert-expires
  "C-c C-u" #'message-insert-or-toggle-importance
  "C-c M-n" #'message-insert-disposition-notification-to

  "C-c C-y" #'message-yank-original
  "C-c C-M-y" #'message-yank-buffer
  "C-c C-q" #'message-fill-yanked-message
  "C-c C-w" #'message-insert-signature
  "C-c M-h" #'message-insert-headers
  "C-c C-r" #'message-caesar-buffer-body
  "C-c C-o" #'message-sort-headers
  "C-c M-r" #'message-rename-buffer

  "C-c C-c" #'message-send-and-exit
  "C-c C-s" #'message-send
  "C-c C-k" #'message-kill-buffer
  "C-c C-d" #'message-dont-send
  "C-c C-j" #'gnus-delay-article

  "C-c M-k" #'message-kill-address
  "C-c C-e" #'message-elide-region
  "C-c C-v" #'message-delete-not-region
  "C-c C-z" #'message-kill-to-signature
  "M-RET" #'message-newline-and-reformat
  "<remap> <split-line>"  #'message-split-line

  "C-c C-a" #'mml-attach-file
  "C-c C-p" #'message-insert-screenshot

  "C-a" #'message-beginning-of-line
  "TAB" #'message-tab

  "M-n" #'message-display-abbrev)

(easy-menu-define
  message-mode-menu message-mode-map "Message Menu."
  '("Message"
    ["Yank Original" message-yank-original message-reply-buffer]
    ["Fill Yanked Message" message-fill-yanked-message t]
    ["Insert Signature" message-insert-signature t]
    ["Caesar (rot13) Message" message-caesar-buffer-body t]
    ["Caesar (rot13) Region" message-caesar-region mark-active]
    ["Elide Region" message-elide-region
     :active mark-active
     :help "Replace text in region with an ellipsis"]
    ["Delete Outside Region" message-delete-not-region
     :active mark-active
     :help "Delete all quoted text outside region"]
    ["Kill To Signature" message-kill-to-signature t]
    ["Newline and Reformat" message-newline-and-reformat t]
    ["Rename buffer" message-rename-buffer t]
    ["Spellcheck" ispell-message :help "Spellcheck this message"]
    "----"
    ["Insert Region Marked" message-mark-inserted-region
     :active mark-active :help "Mark region with enclosing tags"]
    ["Insert File Marked..." message-mark-insert-file
     :help "Insert file at point marked with enclosing tags"]
    ["Attach File..." mml-attach-file t]
    ["Insert Screenshot" message-insert-screenshot t]
    "----"
    ["Send Message" message-send-and-exit :help "Send this message"]
    ["Postpone Message" message-dont-send
     :help "File this draft message and exit"]
    ["Send at Specific Time..." gnus-delay-article
     :help "Ask, then arrange to send message at that time"]
    ["Kill Message" message-kill-buffer
     :help "Delete this message without sending"]
    "----"
    ["Message manual" message-info :help "Display the Message manual"]))

(easy-menu-define
  message-mode-field-menu message-mode-map ""
  '("Field"
    ["To" message-goto-to t]
    ["From" message-goto-from t]
    ["Subject" message-goto-subject t]
    ["Change subject..." message-change-subject t]
    ["Cc" message-goto-cc t]
    ["Bcc" message-goto-bcc t]
    ["Fcc" message-goto-fcc t]
    ["Reply-To" message-goto-reply-to t]
    ["Flag As Important" message-insert-importance-high
     :help "Mark this message as important"]
    ["Flag As Unimportant" message-insert-importance-low
     :help "Mark this message as unimportant"]
    ["Request Receipt"
     message-insert-disposition-notification-to
     :help "Request a receipt notification"]
    "----"
    ;; (typical) news stuff
    ["Summary" message-goto-summary t]
    ["Keywords" message-goto-keywords t]
    ["Newsgroups" message-goto-newsgroups t]
    ["Fetch Newsgroups" message-insert-newsgroups t]
    ["Followup-To" message-goto-followup-to t]
    ;; ["Followup-To (with note in body)" message-cross-post-followup-to t]
    ["Crosspost / Followup-To..." message-cross-post-followup-to t]
    ["Distribution" message-goto-distribution t]
    ["Expires" message-insert-expires t ]
    ["X-No-Archive" message-add-archive-header t ]
    "----"
    ;; (typical) mailing-lists stuff
    ["Fetch To" message-insert-to
     :help "Insert a To header that points to the author."]
    ["Fetch To and Cc" message-insert-wide-reply
     :help "Insert To and Cc headers as if you were doing a wide reply."]
    "----"
    ["Send to list only" message-to-list-only t]
    ["Mail-Followup-To" message-goto-mail-followup-to t]
    ["Unsubscribed list post" message-generate-unsubscribed-mail-followup-to
     :help "Insert a reasonable `Mail-Followup-To:' header."]
    ["Reduce To: to Cc:" message-reduce-to-to-cc t]
    "----"
    ["Sort Headers" message-sort-headers t]
    ["Encode non-ASCII domain names" message-idna-to-ascii-rhs t]
    ;; We hide `message-hidden-headers' by narrowing the buffer.
    ["Show Hidden Headers" message-widen-and-recenter t]
    ["Goto Body" message-goto-body t]
    ["Goto Signature" message-goto-signature t]))

(defvar message-tool-bar-map nil)

(defvar facemenu-add-face-function)
(defvar facemenu-remove-face-function)

;;; Forbidden properties
;;
;; We use `after-change-functions' to keep special text properties
;; that interfere with the normal function of message mode out of the
;; buffer.

(defcustom message-strip-special-text-properties t
  "Strip special properties from the message buffer.

Emacs has a number of special text properties which can break message
composing in various ways.  If this option is set, message will strip
these properties from the message composition buffer.  However, some
packages requires these properties to be present in order to work.
If you use one of these packages, turn this option off, and hope the
message composition doesn't break too bad."
  :version "22.1"
  :group 'message-various
  :link '(custom-manual "(message)Various Message Variables")
  :type 'boolean)

(defvar message-forbidden-properties
  ;; No reason this should be clutter up customize.  We make it a
  ;; property list (rather than a list of property symbols), to be
  ;; directly useful for `remove-text-properties'.
  '(field nil read-only nil invisible nil intangible nil
	  mouse-face nil modification-hooks nil insert-in-front-hooks nil
	  insert-behind-hooks nil point-entered nil point-left nil)
  ;; Other special properties:
  ;; category, face, display: probably doesn't do any harm.
  ;; fontified: is used by font-lock.
  ;; syntax-table, local-map: I dunno.
  "Property list of with properties forbidden in message buffers.
The values of the properties are ignored, only the property names are used.")

(defun message-tamago-not-in-use-p (pos)
  "Return t when tamago version 4 is not in use at the cursor position.
Tamago version 4 is a popular input method for writing Japanese text.
It uses the properties `intangible', `invisible', `modification-hooks'
and `read-only' when translating ascii or kana text to kanji text.
These properties are essential to work, so we should never strip them."
  (not (and (boundp 'egg-modefull-mode)
	    (symbol-value 'egg-modefull-mode)
	    (or (memq (get-text-property pos 'intangible)
		      '(its-part-1 its-part-2))
		(get-text-property pos 'egg-end)
		(get-text-property pos 'egg-lang)
		(get-text-property pos 'egg-start)))))

(defsubst message-mail-alias-type-p (type)
  (if (atom message-mail-alias-type)
      (eq message-mail-alias-type type)
    (memq type message-mail-alias-type)))

(defun message-strip-forbidden-properties (begin end &optional _old-length)
  "Strip forbidden properties between BEGIN and END, ignoring the third arg.
This function is intended to be called from `after-change-functions'.
See also `message-forbidden-properties'."
  (when (and (message-mail-alias-type-p 'ecomplete)
	     (memq this-command message-self-insert-commands))
    (message-display-abbrev))
  (when (and message-strip-special-text-properties
	     (message-tamago-not-in-use-p begin))
    (let ((inhibit-read-only t))
      (remove-text-properties begin end message-forbidden-properties))))

(defvar message-smileys '(":-)" ":)"
                          ":-(" ":("
                          ";-)" ";)")
  "A list of recognized smiley faces in `message-mode'.")

(defun message--syntax-propertize (beg end)
  "Syntax-propertize certain message text specially."
  (with-syntax-table message-mode-syntax-table
    (let ((citation-regexp (concat "^" message-cite-prefix-regexp ".*$"))
          (smiley-regexp (regexp-opt message-smileys)))
      (goto-char beg)
      (while (search-forward-regexp citation-regexp
                                    end 'noerror)
	(let ((start (match-beginning 0))
              (end (match-end 0)))
          (add-text-properties start (1+ start)
                               `(syntax-table ,(string-to-syntax "<")))
          (add-text-properties end (min (1+ end) (point-max))
                               `(syntax-table ,(string-to-syntax ">")))))
      (goto-char beg)
      (while (search-forward-regexp smiley-regexp
				    end 'noerror)
	(add-text-properties (match-beginning 0) (match-end 0)
                             `(syntax-table ,(string-to-syntax ".")))))))

;;;###autoload
(define-derived-mode message-mode text-mode "Message"
  "Major mode for editing mail and news to be sent.
Like `text-mode', but with these additional commands:

\\{message-mode-map}"
  (setq-local message-reply-buffer nil)
  (setq-local message-inserted-headers nil)
  (setq-local message-send-actions nil)
  (setq-local message-return-action nil)
  (setq-local message-exit-actions nil)
  (setq-local message-kill-actions nil)
  (setq-local message-postpone-actions nil)
  (setq-local message-draft-article nil)
  (setq buffer-offer-save t)
  (setq-local facemenu-add-face-function
       (lambda (face end)
	 (let ((face-fun (cdr (assq face message-face-alist))))
	   (if face-fun
	       (funcall face-fun (point) end)
	     (error "Face %s not configured for %s mode" face mode-name)))
	 ""))
  (setq-local facemenu-remove-face-function t)
  (setq-local message-reply-headers nil)
  (make-local-variable 'message-newsreader)
  (make-local-variable 'message-mailer)
  (make-local-variable 'message-post-method)
  (setq-local message-sent-message-via nil)
  (setq-local message-checksum nil)
  (setq-local message-mime-part 0)
  (message-setup-fill-variables)
  (yank-media-handler "image/.*" #'message--yank-media-image-handler)
  (when message-fill-column
    (setq fill-column message-fill-column)
    (turn-on-auto-fill))
  ;; Allow using comment commands to add/remove quoting.
  ;; (setq-local comment-start message-yank-prefix)
  (when message-yank-prefix
    (setq-local comment-start message-yank-prefix)
    (setq-local comment-start-skip
                (concat "^" (regexp-quote message-yank-prefix) "[ \t]*")))
  (setq-local font-lock-defaults '(message-font-lock-keywords t))
  (if (boundp 'tool-bar-map)
      (setq-local tool-bar-map (message-make-tool-bar)))
  ;; Mmmm... Forbidden properties...
  (add-hook 'after-change-functions #'message-strip-forbidden-properties
	    nil 'local)
  ;; Allow mail alias things.
  (cond
   ((message-mail-alias-type-p 'abbrev)
    (mail-abbrevs-setup))
   ((message-mail-alias-type-p 'ecomplete)
    (ecomplete-setup)))
  (add-hook 'completion-at-point-functions #'eudc-capf-complete -1 t)
  (add-hook 'completion-at-point-functions #'message-completion-function nil t)
  (unless buffer-file-name
    (message-set-auto-save-file-name))
  (unless (buffer-base-buffer)
    ;; Don't enable multibyte on an indirect buffer.  Maybe enabling
    ;; multibyte is not necessary at all. -- zsh
    (mm-enable-multibyte))
  (setq-local indent-tabs-mode nil) ; No tabs for indentation.
  (mml-mode)
  ;; Syntactic fontification. Helps `show-paren-mode',
  ;; `electric-pair-mode', and C-M-* navigation by syntactically
  ;; excluding citations and other artifacts.
  ;;
  (setq-local syntax-propertize-function #'message--syntax-propertize)
  (setq-local parse-sexp-ignore-comments t)
  (setq-local message-encoded-mail-cache nil)
  (setq-local image-crop-buffer-text-function #'message--update-image-crop))

(defun message-setup-fill-variables ()
  "Setup message fill variables."
  (setq-local fill-paragraph-function #'message-fill-paragraph)
  (let ((quote-prefix-regexp
	 ;; User should change message-cite-prefix-regexp if
	 ;; message-yank-prefix is set to an abnormal value.
	 (concat "\\(" message-cite-prefix-regexp "\\)[ \t]*")))
    (setq-local paragraph-start
                (concat
                 (regexp-quote mail-header-separator) "$\\|"
                 "[ \t]*$\\|"			; blank lines
                 "-- $\\|"			; signature delimiter
                 "---+$\\|"		   ; delimiters for forwarded messages
                 page-delimiter "$\\|"	; spoiler warnings
                 ".*wrote:$\\|"		; attribution lines
                 quote-prefix-regexp "$\\|"	; empty lines in quoted text
                                        ; mml tags
                 "<#!*/?\\(multipart\\|part\\|external\\|mml\\|secure\\)"))
    (setq-local paragraph-separate paragraph-start)
    (setq-local adaptive-fill-regexp
                (concat quote-prefix-regexp "\\|" adaptive-fill-regexp))
    (setq-local adaptive-fill-first-line-regexp
                (concat quote-prefix-regexp "\\|"
                        adaptive-fill-first-line-regexp)))
  (setq-local auto-fill-inhibit-regexp nil)
  (setq-local normal-auto-fill-function #'message-do-auto-fill))

\f

;;;
;;; Message mode commands
;;;

;;; Movement commands

(defun message-goto-to ()
  "Move point to the To header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "To"))

(defun message-goto-from ()
  "Move point to the From header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "From"))

(defun message-goto-subject ()
  "Move point to the Subject header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Subject"))

(defun message-goto-cc ()
  "Move point to the Cc header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Cc" "To"))

(defun message-goto-bcc ()
  "Move point to the Bcc  header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Bcc" "Cc" "To"))

(defun message-goto-fcc ()
  "Move point to the Fcc header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Fcc" "To" "Newsgroups"))

(defun message-goto-reply-to ()
  "Move point to the Reply-To header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Reply-To" "Subject"))

(defun message-goto-newsgroups ()
  "Move point to the Newsgroups header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Newsgroups"))

(defun message-goto-distribution ()
  "Move point to the Distribution header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Distribution"))

(defun message-goto-followup-to ()
  "Move point to the Followup-To header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Followup-To" "Newsgroups"))

(defun message-goto-mail-followup-to ()
  "Move point to the Mail-Followup-To header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Mail-Followup-To" "To"))

(defun message-goto-keywords ()
  "Move point to the Keywords header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Keywords" "Subject"))

(defun message-goto-summary ()
  "Move point to the Summary header."
  (interactive nil message-mode)
  (push-mark)
  (message-position-on-field "Summary" "Subject"))

(define-obsolete-function-alias 'message-goto-body-1 #'message-goto-body "27.1")
(defun message-goto-body (&optional interactive)
  "Move point to the beginning of the message body.
Returns point."
  (interactive "p" message-mode)
  (when interactive
    (when (looking-at "[ \t]*\n")
    (expand-abbrev))
    (push-mark))
  (goto-char (point-min))
  (or (search-forward (concat "\n" mail-header-separator "\n") nil t)
      ;; If the message is mangled, find the end of the headers the
      ;; hard way.
      (progn
	;; Skip past all headers and continuation lines.
	(while (looking-at "[^\t\n :]+:\\|[\t ]+[^\t\n ]")
	  (forward-line 1))
	;; We're now at the first empty line, so perhaps move past it.
	(when (and (eolp)
		   (not (eobp)))
	  (forward-line 1))
	(point))))

(defun message-in-body-p ()
  "Return t if point is in the message body."
  (>= (point)
      (save-excursion
	(message-goto-body))))

(defun message-goto-eoh (&optional interactive)
  "Move point to the end of the headers."
  (interactive "p" message-mode)
  (message-goto-body interactive)
  (forward-line -1))

(defun message-goto-signature ()
  "Move point to the beginning of the message signature.
If there is no signature in the article, go to the end and
return nil."
  (interactive nil message-mode)
  (push-mark)
  (goto-char (point-min))
  (if (re-search-forward message-signature-separator nil t)
      (forward-line 1)
    (goto-char (point-max))
    nil))

(defun message-generate-unsubscribed-mail-followup-to (&optional include-cc)
  "Insert a reasonable MFT header in a post to an unsubscribed list.
When making original posts to a mailing list you are not subscribed to,
you have to type in a MFT header by hand.  The contents, usually, are
the addresses of the list and your own address.  This function inserts
such a header automatically.  It fetches the contents of the To: header
in the current mail buffer, and appends the current `user-mail-address'.

If the optional argument INCLUDE-CC is non-nil, the addresses in the
Cc: header are also put into the MFT."

  (interactive "P" message-mode)
  (let* (cc tos)
    (save-restriction
      (message-narrow-to-headers)
      (message-remove-header "Mail-Followup-To")
      (setq cc (and include-cc (message-fetch-field "Cc")))
      (setq tos (if cc
		    (concat (message-fetch-field "To") "," cc)
		  (message-fetch-field "To"))))
    (message-goto-mail-followup-to)
    (insert (concat tos ", " user-mail-address))))

\f

(defun message-insert-to (&optional force)
  "Insert a To header that points to the author of the article being replied to.
If the original author requested not to be sent mail, don't insert unless the
prefix FORCE is given."
  (interactive "P" message-mode)
  (let* ((mct (message-fetch-reply-field "mail-copies-to"))
	 (dont (and mct (or (equal (downcase mct) "never")
			    (equal (downcase mct) "nobody"))))
	 (to (or (message-fetch-reply-field "mail-reply-to")
		 (message-fetch-reply-field "reply-to")
		 (message-fetch-reply-field "from"))))
    (when (and dont to)
      (message
       (if force
	   "Ignoring the user request not to have copies sent via mail"
	 "Complying with the user request not to have copies sent via mail")))
    (when (and force (not to))
      (error "No mail address in the article"))
    (when (and to (or force (not dont)))
      (message-carefully-insert-headers (list (cons 'To to))))))

(defun message-insert-wide-reply ()
  "Insert To and Cc headers as if you were doing a wide reply."
  (interactive nil message-mode)
  (let ((headers (message-with-reply-buffer
		   (message-get-reply-headers t))))
    (message-carefully-insert-headers headers)))

(defcustom message-header-synonyms
  '((To Cc Bcc)
    (Original-To))
  "List of lists of header synonyms.
E.g., if this list contains a member list with elements `Cc' and `To',
then `message-carefully-insert-headers' will not insert a `To' header
when the message is already `Cc'ed to the recipient."
  :version "22.1"
  :group 'message-headers
  :link '(custom-manual "(message)Message Headers")
  :type '(repeat sexp))

(defun message-carefully-insert-headers (headers)
  "Insert the HEADERS, an alist, into the message buffer.
Does not insert the headers when they are already present there
or in the synonym headers, defined by `message-header-synonyms'."
  ;; FIXME: Should compare only the address and not the full name.  Comparison
  ;; should be done case-folded (and with `string=' rather than
  ;; `string-match').
  ;; (mail-strip-quoted-names "Foo Bar <foo@bar>, bla@fasel (Bla Fasel)")
  (dolist (header headers)
    (let* ((header-name (symbol-name (car header)))
	   (new-header (cdr header))
	   (synonyms (cl-loop for synonym in message-header-synonyms
			      when (memq (car header) synonym) return synonym))
	   (old-header
	    (cl-loop for synonym in synonyms
		     for old-header = (mail-fetch-field (symbol-name synonym))
		     when (and old-header (string-match new-header old-header))
		     return synonym)))
      (if old-header
	  (message "already have `%s' in `%s'" new-header old-header)
	(when (and (message-position-on-field header-name)
		   (setq old-header (mail-fetch-field header-name))
		   (not (string-match "\\` *\\'" old-header)))
	  (insert ", "))
	(insert new-header)))))

(defun message-widen-reply ()
  "Widen the reply to include maximum recipients."
  (interactive nil message-mode)
  (let ((follow-to
         (and (buffer-live-p message-reply-buffer)
	      (with-current-buffer message-reply-buffer
		(message-get-reply-headers t)))))
    (save-excursion
      (save-restriction
	(message-narrow-to-headers)
	(dolist (elem follow-to)
	  (message-remove-header (symbol-name (car elem)))
	  (goto-char (point-min))
	  (insert (symbol-name (car elem)) ": "
		  (cdr elem) "\n"))))))

(defun message-insert-newsgroups ()
  "Insert the Newsgroups header from the article being replied to."
  (interactive nil message-mode)
  (let ((old-newsgroups (mail-fetch-field "newsgroups"))
	(new-newsgroups (message-fetch-reply-field "newsgroups"))
	(first t)
	insert-newsgroups)
    (message-position-on-field "Newsgroups")
    (cond
     ((not new-newsgroups)
      (error "No Newsgroups to insert"))
     ((not old-newsgroups)
      (insert new-newsgroups))
     (t
      (setq new-newsgroups (split-string new-newsgroups "[, ]+")
	    old-newsgroups (split-string old-newsgroups "[, ]+"))
      (dolist (group new-newsgroups)
	(unless (member group old-newsgroups)
	  (push group insert-newsgroups)))
      (if (null insert-newsgroups)
	  (error "Newgroup%s already in the header"
		 (if (> (length new-newsgroups) 1)
		     "s" ""))
	(when old-newsgroups
	  (setq first nil))
	(dolist (group insert-newsgroups)
	  (unless first
	    (insert ","))
	  (setq first nil)
	  (insert group)))))))

\f

;;; Various commands

(defun message-widen-and-recenter ()
  "Widen the buffer and go to the start."
  (interactive nil message-mode)
  (widen)
  (goto-char (point-min)))

(defun message-delete-not-region (beg end)
  "Delete everything in the body of the current message outside of the region."
  (interactive "r" message-mode)
  (let (citeprefix)
    (save-excursion
      (goto-char beg)
      ;; snarf citation prefix, if appropriate
      (unless (eq (point) (progn (beginning-of-line) (point)))
	(when (looking-at message-cite-prefix-regexp)
	  (setq citeprefix (match-string 0))))
      (goto-char end)
      (delete-region (point) (if (not (message-goto-signature))
				 (point)
			       (forward-line -2)
			       (point)))
      (insert "\n")
      (goto-char beg)
      (delete-region beg (progn (message-goto-body)
				(forward-line 2)
				(point)))
      (when citeprefix
	(insert citeprefix))))
  (when (message-goto-signature)
    (forward-line -2)))

(defun message-kill-to-signature (&optional arg)
  "Kill all text up to the signature.
If a numeric argument or prefix arg is given, leave that number
of lines before the signature intact."
  (interactive "P" message-mode)
  (save-excursion
    (save-restriction
      (let ((point (point)))
	(narrow-to-region point (point-max))
	(message-goto-signature)
	(unless (eobp)
	  (if (and arg (numberp arg))
	      (forward-line (- -1 arg))
	    (end-of-line -1)))
	(unless (= point (point))
	  (kill-region point (point))
	  (unless (bolp)
	    (insert "\n")))))))

(defun message-newline-and-reformat (&optional arg not-break)
  "Insert four newlines, and then reformat if inside quoted text.
Prefix arg means justify as well.

This function tries to guess what the quote prefix is based on
the text on the current line before point.  If point is at the
start of the line, the formatted text (if any) is filled without
a quote prefix."
  (interactive (list (if current-prefix-arg 'full)) message-mode)
  (unless (message-in-body-p)
    (error "This command only works in the body of the message"))
  (let (quoted point beg end leading-space bolp fill-paragraph-function)
    (setq point (point))
    (beginning-of-line)
    (setq beg (point))
    (setq bolp (= beg point))
    ;; Find first line of the paragraph.
    (if not-break
	(while (and (not (eobp))
		    (not (looking-at message-cite-prefix-regexp))
		    (looking-at paragraph-start))
	  (forward-line 1)))
    ;; Find the prefix
    (when (looking-at message-cite-prefix-regexp)
      (setq quoted (match-string 0))
      (goto-char (match-end 0))
      (let ((after (point)))
        ;; This is a line with no text after the cite prefix.  In that
        ;; case, the trailing space is commonly not present, so look
        ;; around for other lines that have some data.
        (when (looking-at-p "\n")
          (let ((regexp (concat "^" message-cite-prefix-regexp "[ \t]")))
            (when (or (re-search-backward regexp nil t)
                      (re-search-forward regexp nil t))
              (goto-char (1- (match-end 0))))))
        (looking-at "[ \t]*")
        (setq leading-space (match-string 0))
        (goto-char after)))
    (if (and quoted
	     (not not-break)
	     (not bolp)
	     (< (- point beg) (length quoted)))
	;; break inside the cite prefix.
	(setq quoted nil
	      end nil))
    (if quoted
	(progn
	  (forward-line 1)
	  (while (and (not (eobp))
		      (not (looking-at paragraph-separate))
		      (looking-at message-cite-prefix-regexp)
		      (equal quoted (match-string 0)))
	    (goto-char (match-end 0))
	    (looking-at "[ \t]*")
	    (when (> (length leading-space) (length (match-string 0)))
	      (setq leading-space (match-string 0)))
	    (forward-line 1))
	  (setq end (point))
	  (goto-char beg)
	  (while (and (if (bobp) nil (forward-line -1) t)
		      (not (looking-at paragraph-start))
		      (looking-at message-cite-prefix-regexp)
		      (equal quoted (match-string 0)))
	    (setq beg (point))
	    (goto-char (match-end 0))
	    (looking-at "[ \t]*")
	    (if (> (length leading-space) (length (match-string 0)))
		(setq leading-space (match-string 0)))))
      (while (and (not (eobp))
		  (not (looking-at paragraph-separate))
		  (not (looking-at message-cite-prefix-regexp)))
	(forward-line 1))
      (setq end (point))
      (goto-char beg)
      (while (and (if (bobp) nil (forward-line -1) t)
		  (not (looking-at paragraph-start))
		  (not (looking-at message-cite-prefix-regexp)))
	(setq beg (point))))
    (goto-char point)
    (save-restriction
      (narrow-to-region beg end)
      (if not-break
	  (setq point nil)
	(if bolp
	    (newline)
	  (newline)
	  (newline))
	(setq point (point))
	;; (newline 2) doesn't mark both newline's as hard, so call
	;; newline twice. -jas
	(newline)
	(newline)
	(delete-region (point) (re-search-forward "[ \t]*"))
	(when (and quoted (not bolp))
	  (insert quoted leading-space)))
      (undo-boundary)
      (if quoted
	  (let* ((adaptive-fill-regexp
		  (regexp-quote (concat quoted leading-space)))
		 (adaptive-fill-first-line-regexp
		  adaptive-fill-regexp ))
	    (fill-paragraph arg))
	(fill-paragraph arg))
      (if point (goto-char point)))))

(defun message-fill-paragraph (&optional arg)
  "Message specific function to fill a paragraph.
This function is used as the value of `fill-paragraph-function' in
Message buffers and is not meant to be called directly."
  (interactive (list (if current-prefix-arg 'full)) message-mode)
  (if (message-point-in-header-p)
      (message-fill-field)
    (message-newline-and-reformat arg t))
  t)

(defun message-point-in-header-p ()
  "Return t if point is in the header."
  (save-excursion
    (save-restriction
      (widen)
      (let ((bound (+ (line-end-position) 1)) case-fold-search)
        (goto-char (point-min))
        (not (search-forward (concat "\n" mail-header-separator "\n")
                             bound t))))))

(defun message-do-auto-fill ()
  "Like `do-auto-fill', but don't fill in message header."
  (unless (message-point-in-header-p)
    (let ((paragraph-separate (default-value 'paragraph-separate)))
      (do-auto-fill))))

(defun message-insert-signature (&optional force)
  "Insert a signature at the end of the buffer.

See the documentation for the `message-signature' variable for
more information.

If FORCE is 0 (or when called interactively), the global values
of the signature variables will be consulted if the local ones
are null."
  (interactive (list 0) message-mode)
  (let ((message-signature message-signature)
	(message-signature-file message-signature-file))
    ;; If called interactively and there's no signature to insert,
    ;; consult the global values to see whether there's anything they
    ;; have to say for themselves.  This can happen when using
    ;; `gnus-posting-styles', for instance.
    (when (and (null message-signature)
	       (null message-signature-file)
	       (eq force 0))
      (setq message-signature (default-value 'message-signature)
	    message-signature-file (default-value 'message-signature-file)))
    (let* ((signature
	    (cond
	     ((and (null message-signature)
		   (eq force 0))
	      (save-excursion
		(goto-char (point-max))
		(not (re-search-backward message-signature-separator nil t))))
	     ((and (null message-signature)
		   force)
	      t)
	     ((functionp message-signature)
	      (funcall message-signature))
	     ((listp message-signature)
	      (eval message-signature t))
	     (t message-signature)))
	   signature-file)
      (setq signature
	    (cond ((stringp signature)
		   signature)
		  ((and (eq t signature) message-signature-file)
		   (setq signature-file
			 (if (and message-signature-directory
				  ;; don't actually use the signature directory
				  ;; if message-signature-file contains a path.
				  (not (file-name-directory
					message-signature-file)))
			     (expand-file-name message-signature-file
					       message-signature-directory)
			   message-signature-file))
		   (file-exists-p signature-file))))
      (when signature
	(goto-char (point-max))
	;; Insert the signature.
	(unless (bolp)
	  (newline))
	(when message-signature-insert-empty-line
	  (newline))
	(insert "-- ")
	(newline)
	(if (eq signature t)
	    (insert-file-contents signature-file)
	  (insert signature))
	(goto-char (point-max))
	(or (bolp) (newline))))))

(defun message-insert-importance-high ()
  "Insert header to mark message as important."
  (interactive nil message-mode)
  (save-excursion
    (save-restriction
      (message-narrow-to-headers)
      (message-remove-header "Importance"))
    (message-goto-eoh)
    (insert "Importance: high\n")))

(defun message-insert-importance-low ()
  "Insert header to mark message as unimportant."
  (interactive nil message-mode)
  (save-excursion
    (save-restriction
      (message-narrow-to-headers)
      (message-remove-header "Importance"))
    (message-goto-eoh)
    (insert "Importance: low\n")))

(defun message-insert-or-toggle-importance ()
  "Insert a \"Importance: high\" header, or cycle through the header values.
The three allowed values according to RFC 1327 are `high', `normal'
and `low'."
  (interactive nil message-mode)
  (save-excursion
    (let ((new "high")
	  cur)
      (save-restriction
	(message-narrow-to-headers)
	(when (setq cur (message-fetch-field "Importance"))
	  (message-remove-header "Importance")
	  (setq new (cond ((string= cur "high")
			   "low")
			  ((string= cur "low")
			   "normal")
			  (t
			   "high")))))
      (message-goto-eoh)
      (insert (format "Importance: %s\n" new)))))

(defun message-insert-disposition-notification-to ()
  "Request a disposition notification (return receipt) to this message.
Note that this should not be used in newsgroups."
  (interactive nil message-mode)
  (save-excursion
    (save-restriction
      (message-narrow-to-headers)
      (message-remove-header "Disposition-Notification-To"))
    (message-goto-eoh)
    (insert (format "Disposition-Notification-To: %s\n"
		    (or (message-field-value "Reply-To")
			(message-field-value "From")
			(message-make-from))))))

(defun message-elide-region (b e)
  "Elide the text in the region.
An ellipsis (from `message-elide-ellipsis') will be inserted where the
text was killed."
  (interactive "r" message-mode)
  (let ((lines (count-lines b e))
        (chars (- e b)))
    (kill-region b e)
    (insert (format-spec message-elide-ellipsis
                         `((?l . ,lines)
                           (?c . ,chars))))))

(defvar message-caesar-translation-table nil)

(defun message-caesar-region (b e &optional n)
  "Caesar rotate region B to E by N, default 13, for decrypting netnews."
  (interactive
   (list
    (min (point) (or (mark t) (point)))
    (max (point) (or (mark t) (point)))
    (when current-prefix-arg
      (prefix-numeric-value current-prefix-arg)))
   message-mode)

  (setq n (if (numberp n) (mod n 26) 13)) ;canonize N
  (unless (or (zerop n)		        ; no action needed for a rot of 0
	      (= b e))			; no region to rotate
    ;; We build the table, if necessary.
    (when (or (not message-caesar-translation-table)
	      (/= (aref message-caesar-translation-table ?a) (+ ?a n)))
      (setq message-caesar-translation-table
	    (message-make-caesar-translation-table n)))
    (translate-region b e message-caesar-translation-table)))

(defun message-make-caesar-translation-table (n)
  "Create a rot table with offset N."
  (let ((i -1)
	(table (make-string 256 0)))
    (while (< (cl-incf i) 256)
      (aset table i i))
    (concat
     (substring table 0 ?A)
     (substring table (+ ?A n) (+ ?A n (- 26 n)))
     (substring table ?A (+ ?A n))
     (substring table (+ ?A 26) ?a)
     (substring table (+ ?a n) (+ ?a n (- 26 n)))
     (substring table ?a (+ ?a n))
     (substring table (+ ?a 26) 255))))

(defun message-caesar-buffer-body (&optional rotnum wide)
  "Caesar rotate all letters in the current buffer by 13 places.
Used to encode/decode possibly offensive messages (commonly in rec.humor).
With prefix arg, specifies the number of places to rotate each letter forward.
Mail and Usenet news headers are not rotated unless WIDE is non-nil."
  (interactive (if current-prefix-arg
		   (list (prefix-numeric-value current-prefix-arg))
		 (list nil))
	       message-mode)
  (save-excursion
    (save-restriction
      (when (and (not wide) (message-goto-body))
	(narrow-to-region (point) (point-max)))
      (message-caesar-region (point-min) (point-max) rotnum))))

(defun message-pipe-buffer-body (program)
  "Pipe the message body in the current buffer through PROGRAM."
  (save-excursion
    (save-restriction
      (when (message-goto-body)
	(narrow-to-region (point) (point-max)))
      (shell-command-on-region
       (point-min) (point-max) program nil t))))

(defun message-rename-buffer (&optional enter-string)
  "Rename the *message* buffer to \"*message* RECIPIENT\".
If the function is run with a prefix, it will ask for a new buffer
name, rather than giving an automatic name."
  (interactive "Pbuffer name: " message-mode)
  (save-excursion
    (save-restriction
      (goto-char (point-min))
      (narrow-to-region (point)
			(search-forward mail-header-separator nil 'end))
      (let* ((mail-to (or
		       (if (message-news-p) (message-fetch-field "Newsgroups")
			 (message-fetch-field "To"))
		       ""))
	     (mail-trimmed-to
	      (if (string-match "," mail-to)
		  (concat (substring mail-to 0 (match-beginning 0)) ", ...")
		mail-to))
	     (name-default (concat "*message* " mail-trimmed-to))
	     (name (if enter-string
		       (read-string "New buffer name: " name-default)
		     name-default)))
	(rename-buffer name t)))))

(defun message-fill-yanked-message (&optional justifyp)
  "Fill the paragraphs of a message yanked into this one.
Numeric argument means justify as well."
  (interactive "P" message-mode)
  (save-excursion
    (goto-char (point-min))
    (search-forward (concat "\n" mail-header-separator "\n") nil t)
    (let ((fill-prefix message-yank-prefix))
      (fill-individual-paragraphs (point) (point-max) justifyp))))

(defun message-indent-citation (&optional start end yank-only)
  "Modify text just inserted from a message to be cited.
The inserted text should be the region.
When this function returns, the region is again around the modified text.

Normally, indent each nonblank line `message-indentation-spaces' spaces.
However, if `message-yank-prefix' is non-nil, insert that prefix on each line."
  (unless start (setq start (point)))
  (unless yank-only
    ;; Remove unwanted headers.
    (when message-ignored-cited-headers
      (let (all-removed)
	(save-restriction
	  (narrow-to-region
	   (goto-char start)
	   (if (search-forward "\n\n" nil t)
	       (1- (point))
	     (point)))
	  (message-remove-header message-ignored-cited-headers t)
	  (when (= (point-min) (point-max))
	    (setq all-removed t))
	  (goto-char (point-max)))
	(if all-removed
	    (goto-char start)
	  (forward-line 1))))
    ;; Delete blank lines at the start of the cited text.
    (while (and (eolp) (not (eobp)))
      (delete-line))
    ;; Delete blank lines at the end of the buffer.
    (goto-char (point-max))
    (unless (eq (preceding-char) ?\n)
      (insert "\n"))
    (while (and (zerop (forward-line -1))
		(looking-at "$"))
      (delete-line)))
  ;; Do the indentation.
  (if (null message-yank-prefix)
      (indent-rigidly start (or end (mark t)) message-indentation-spaces)
    (save-excursion
      (goto-char start)
      (while (< (point) (or end (mark t)))
	(cond ((looking-at ">")
	       (insert message-yank-cited-prefix))
	      ((looking-at "^$")
	       (insert message-yank-empty-prefix))
	      (t
	       (insert message-yank-prefix)))
	(forward-line 1))))
  (goto-char start))

(defun message-remove-blank-cited-lines (&optional remove)
  "Remove cited lines containing only blanks.
If REMOVE is non-nil, remove newlines, too.

To use this automatically, you may add this function to
`gnus-message-setup-hook'."
  (interactive "P" message-mode)
  (let ((citexp (concat "^\\("
			(concat message-yank-cited-prefix "\\|")
			message-yank-prefix
			"\\)+ *\n")))
    (message "Removing `%s'" citexp)
    (save-excursion
      (message-goto-body)
      (while (re-search-forward citexp nil t)
	(replace-match (if remove "" "\n"))))))

(defun message--yank-original-internal (arg)
  (let ((modified (buffer-modified-p))
	body-text)
	(when (and message-reply-buffer
		   message-cite-function)
	  (when (equal message-cite-reply-position 'above)
	    (save-excursion
	      (setq body-text
		    (buffer-substring (message-goto-body)
				      (point-max)))
	      (delete-region (message-goto-body) (point-max))))
	  (if (bufferp message-reply-buffer)
	      (delete-windows-on message-reply-buffer t))
	  (push-mark (save-excursion
		       (cond
			((bufferp message-reply-buffer)
			 (insert-buffer-substring message-reply-buffer))
			((and (consp message-reply-buffer)
			      (functionp (car message-reply-buffer)))
			 (apply (car message-reply-buffer)
				(cdr message-reply-buffer))))
		       (unless (bolp)
			 (insert ?\n))
		       (point)))
	  (unless arg
	    (funcall message-cite-function)
	    (unless (eq (char-before (mark t)) ?\n)
	      (let ((pt (point)))
		(goto-char (mark t))
		(insert-before-markers ?\n)
		(goto-char pt))))
	  (pcase message-cite-reply-position
	    ('above
	     (message-goto-body)
	     (insert body-text)
	     (insert (if (bolp) "\n" "\n\n"))
	     (message-goto-body))
	    ('below
	     (message-goto-signature)))
	  ;; Add a `message-setup-very-last-hook' here?
	  ;; Add `gnus-article-highlight-citation' here?
	  (unless modified
        (setq message-checksum (message-checksum))))))

(defun message-yank-original (&optional arg)
  "Insert the message being replied to, if any.
Puts point before the text and mark after.
Normally indents each nonblank line ARG spaces (default 3).  However,
if `message-yank-prefix' is non-nil, insert that prefix on each line.

This function uses `message-cite-function' to do the actual citing.

Just \\[universal-argument] as argument means don't indent, insert no
prefix, and don't delete any headers."
  (interactive "P" message-mode)
  ;; eval the let forms contained in message-cite-style
  (let ((bindings (if (symbolp message-cite-style)
	              (symbol-value message-cite-style)
	            message-cite-style)))
    (cl-progv (mapcar #'car bindings)
        (mapcar (lambda (binding) (eval (cadr binding) t)) bindings)
      (message--yank-original-internal arg))))

(defun message-yank-buffer (buffer)
  "Insert BUFFER into the current buffer and quote it."
  (interactive "bYank buffer: " message-mode)
  (let ((message-reply-buffer (get-buffer buffer)))
    (save-window-excursion
      (message-yank-original))))

(defun message-buffers ()
  "Return a list of active message buffers."
  (let (buffers)
    (save-current-buffer
      (dolist (buffer (buffer-list t))
	(set-buffer buffer)
	(when (and (derived-mode-p 'message-mode)
		   (null message-sent-message-via))
	  (push (buffer-name buffer) buffers))))
    (nreverse buffers)))

(defun message-cite-original-1 (strip-signature)
  "Cite an original message.
If STRIP-SIGNATURE is non-nil, strips off the signature from the
original message.

This function uses `mail-citation-hook' if that is non-nil."
  (if (and (boundp 'mail-citation-hook)
	   mail-citation-hook)
      (run-hooks 'mail-citation-hook)
    (let* ((start (point))
	   (end (mark t))
	   (x-no-archive nil)
	   (functions
	    (when message-indent-citation-function
	      (if (listp message-indent-citation-function)
		  message-indent-citation-function
		(list message-indent-citation-function))))
	   ;; This function may be called by `gnus-summary-yank-message' and
	   ;; may insert a different article from the original.  So, we will
	   ;; modify the value of `message-reply-headers' with that article.
	   (message-reply-headers
	    (save-restriction
	      (narrow-to-region start end)
	      (message-narrow-to-head-1)
	      (setq x-no-archive (message-fetch-field "x-no-archive"))
	      (make-full-mail-header
               0
	       (or (message-fetch-field "subject") "none")
	       (or (message-fetch-field "from") "nobody")
	       (message-fetch-field "date")
	       (message-fetch-field "message-id" t)
	       (message-fetch-field "references")
	       0 0 ""))))
      (mml-quote-region start end)
      (when strip-signature
	;; Allow undoing.
	(undo-boundary)
	(goto-char end)
	(when (re-search-backward message-signature-separator start t)
	  ;; Also peel off any blank lines before the signature.
	  (forward-line -1)
	  (while (looking-at "^[ \t]*$")
	    (forward-line -1))
	  (forward-line 1)
	  (delete-region (point) end)
	  (unless (search-backward "\n\n" start t)
	    ;; Insert a blank line if it is peeled off.
	    (insert "\n"))))
      (goto-char start)
      (mapc #'funcall functions)
      (when message-citation-line-function
	(unless (bolp)
	  (insert "\n"))
	(funcall message-citation-line-function))
      (when (and x-no-archive
		 (not message-cite-articles-with-x-no-archive)
		 (string-match "yes" x-no-archive))
	(undo-boundary)
	(delete-region (point) (mark t))
	(insert "> [Quoted text removed due to X-No-Archive]\n")
	(push-mark)
	(forward-line -1)))))

(defun message-cite-original ()
  "Cite function in the standard Message manner."
  (message-cite-original-1 nil))

(autoload 'gnus-date-get-time "gnus-util")

(defun message-insert-formatted-citation-line (&optional from date tz)
  "Function that inserts a formatted citation line.
The optional FROM, and DATE are strings containing the contents of
the From header and the Date header respectively.

The optional TZ is omitted or nil for Emacs local time, t for
Universal Time, `wall' for system wall clock time, or a string as
in the TZ environment variable.  It can also be a list (as from
`current-time-zone') or an integer (as from `decode-time')
applied without consideration for daylight saving time.

See `message-citation-line-format'."
  ;; The optional args are for testing/debugging.  They will disappear later.
  ;; Example:
  ;; (with-temp-buffer
  ;;   (message-insert-formatted-citation-line
  ;;    "John Doe <john.doe@example.invalid>"
  ;;    (message-make-date))
  ;;   (buffer-string))
  (when (or message-reply-headers (and from date))
    (unless from
      (setq from (mail-header-from message-reply-headers)))
    (let* ((data (ignore-errors
                   (funcall (or (bound-and-true-p
                                 gnus-extract-address-components)
                                #'mail-extract-address-components)
                            from)))
	   (name (car data))
	   (fname name)
	   (lname name)
           (net (cadr data))
           (name-or-net (or name net from))
	   (time
            (when (string-match-p "%[^FLNfn]" message-citation-line-format)
	      (cond ((numberp (car-safe date)) date) ;; backward compatibility
		    (date (gnus-date-get-time date))
		    (t
		     (gnus-date-get-time
		      (setq date (mail-header-date message-reply-headers)))))))
	   (tz (or tz
		   (when (stringp date)
		     (nth 8 (parse-time-string date)))))
           spec)
      (when (stringp name)
        ;; Guess first name and last name:
        (let* ((names (seq-filter
                       (lambda (s)
                         (string-match-p (rx bos (+ (in word ?. ?-)) eos) s))
                       (split-string name "[ \t]+")))
               (count (length names)))
          (cond ((= count 1)
                 (setq fname (car names)
                       lname ""))
                ((or (= count 2) (= count 3))
                 (setq fname (car names)
                       lname (string-join (cdr names) " ")))
                ((> count 3)
                 (setq fname (string-join (take 2 names) " ")
                       lname (string-join (nthcdr 2 names) " "))))
          (when (string-match "\\(.*\\),\\'" fname)
            (let ((newlname (match-string 1 fname)))
              (setq fname lname lname newlname)))))
      ;; The following letters are not used in `format-time-string':
      (push (cons ?E "<E>") spec)
      (push (cons ?F (or fname name-or-net)) spec)
      ;; We might want to use "" instead of "<X>" later.
      (push (cons ?J "<J>") spec)
      (push (cons ?K "<K>") spec)
      (push (cons ?L lname) spec)
      (push (cons ?N name-or-net) spec)
      (push (cons ?O "<O>") spec)
      (push (cons ?P "<P>") spec)
      (push (cons ?Q "<Q>") spec)
      (push (cons ?f from) spec)
      (push (cons ?i "<i>") spec)
      (push (cons ?n net) spec)
      (push (cons ?o "<o>") spec)
      (push (cons ?q "<q>") spec)
      (push (cons ?t "<t>") spec)
      (push (cons ?v "<v>") spec)
      ;; Delegate the rest to `format-time-string':
      (dolist (c (nconc (number-sequence ?A ?Z)
                        (number-sequence ?a ?z)))
        (unless (assq c spec)
          (push (cons c (condition-case nil
                            (format-time-string (format "%%%c" c) time tz)
                          (error (format ">%c<" c))))
                spec)))
      (insert (format-spec message-citation-line-format spec)))
    (newline)))

(defun message-cite-original-without-signature ()
  "Cite function in the standard Message manner.
This function strips off the signature from the original message."
  (message-cite-original-1 t))

(defun message-insert-citation-line ()
  "Insert a simple citation line."
  (when message-reply-headers
    (insert (mail-header-from message-reply-headers) " writes:")
    (newline)
    (newline)))

(defun message-position-on-field (header &rest afters)
  (let ((case-fold-search t))
    (save-restriction
      (narrow-to-region
       (goto-char (point-min))
       (progn
	 (re-search-forward
	  (concat "^" (regexp-quote mail-header-separator) "$"))
	 (match-beginning 0)))
      (goto-char (point-min))
      (if (re-search-forward (concat "^" (regexp-quote header) ":") nil t)
	  (progn
	    (re-search-forward "^[^ \t]" nil 'move)
	    (beginning-of-line)
	    (skip-chars-backward "\n")
	    t)
	(while (and afters
		    (not (re-search-forward
			  (concat "^" (regexp-quote (car afters)) ":")
			  nil t)))
	  (pop afters))
	(when afters
	  (re-search-forward "^[^ \t]" nil 'move)
	  (beginning-of-line))
	(insert header ": \n")
	(forward-char -1)
	nil))))

\f

;;;
;;; Sending messages
;;;

(defun message-send-and-exit (&optional arg)
  "Send message like `message-send', then, if no errors, exit from mail buffer.
The usage of ARG is defined by the instance that called Message.
It should typically alter the sending method in some way or other."
  (interactive "P" message-mode)
  (let ((buf (current-buffer))
	(position (point-marker))
	(actions message-exit-actions))
    (when (and (message-send arg)
               (buffer-live-p buf))
      (if message-kill-buffer-on-exit
	  (kill-buffer buf)
	;; Restore the point in the message buffer.
	(save-window-excursion
	  (switch-to-buffer buf)
	  (set-window-point nil position)
	  (set-marker position nil))
	(message-bury buf))
      (message-do-actions actions)
      t)))

(defun message-dont-send ()
  "Don't send the message you have been editing.
Instead, just auto-save the buffer and then bury it."
  (interactive nil message-mode)
  (set-buffer-modified-p t)
  (save-buffer)
  (let ((actions message-postpone-actions))
    (message-bury (current-buffer))
    (message-do-actions actions)))

(defun message-kill-buffer ()
  "Kill the current buffer."
  (interactive nil message-mode)
  (when (or (not (buffer-modified-p))
	    (not message-kill-buffer-query)
	    (yes-or-no-p "Message modified; kill anyway? "))
    (let ((actions message-kill-actions)
	  (draft-article message-draft-article)
	  (auto-save-file-name buffer-auto-save-file-name)
	  (file-name buffer-file-name)
	  (modified (buffer-modified-p)))
      (setq buffer-file-name nil)
      (kill-buffer (current-buffer))
      (when (and (or (and auto-save-file-name
			  (file-exists-p auto-save-file-name))
		     (and file-name
			  (file-exists-p file-name)))
		 (progn
		   ;; If the message buffer has lived in a dedicated window,
		   ;; `kill-buffer' has killed the frame.  Thus the
		   ;; `yes-or-no-p' may show up in a lowered frame.  Make sure
		   ;; that the user can see the question by raising the
		   ;; current frame:
		   (raise-frame)
		   (yes-or-no-p (format "Remove the backup file%s? "
					(if modified " too" "")))))
	(ignore-errors
	  (delete-file auto-save-file-name))
	(let ((message-draft-article draft-article))
	  (message-disassociate-draft)))
      (message-do-actions actions))))

(defun message-bury (buffer)
  "Bury this mail BUFFER."
  ;; Note that this is not quite the same as (bury-buffer buffer),
  ;; since bury-buffer does extra stuff with a nil argument.
  ;; Eg https://lists.gnu.org/r/emacs-devel/2014-01/msg00539.html
  (with-current-buffer buffer (bury-buffer))
  (if message-return-action
      (apply (car message-return-action) (cdr message-return-action))))

(autoload 'mml-secure-bcc-is-safe "mml-sec")

(defcustom message-server-alist nil
  "Alist of rules to generate \"X-Message-SMTP-Method\" header.
The header will be inserted just before the message is sent.
Elements should be of the form (COND . METHOD).
If COND is a string, METHOD will be inserted if the \"From\"
address compares equal with COND.
If COND is a function, METHOD will be inserted if COND returns
a non-nil value when called in the message buffer without any
arguments.  If METHOD is nil in this case, the return value of
the function will be inserted instead.
If the buffer already has a\"X-Message-SMTP-Method\" header,
it is left unchanged."
  :type '(alist :key-type (choice
                           (string :tag "From Address")
                           (function :tag "Predicate"))
                :value-type string)
  :version "29.1"
  :group 'message-sending)

(defun message-update-smtp-method-header ()
  "Insert an X-Message-SMTP-Method header according to `message-server-alist'."
  (unless (message-fetch-field "X-Message-SMTP-Method")
    (let ((from (cadr (mail-extract-address-components
                       (save-restriction
                         (widen)
                         (message-narrow-to-headers-or-head)
                         (message-fetch-field "From")))))
          method)
      (catch 'exit
        (dolist (server message-server-alist)
          (cond ((functionp (car server))
                 (let ((res (funcall (car server))))
                   (when res
                     (setq method (or (cdr server) res))
                     (throw 'exit nil))))
                ((and (stringp (car server))
                      (string-equal-ignore-case (car server) from))
                 (setq method (cdr server))
                 (throw 'exit nil)))))
      (when method
        (message-add-header (concat "X-Message-SMTP-Method: " method))))))

(defun message-send (&optional arg)
  "Send the message in the current buffer.
If `message-interactive' is non-nil, wait for success indication or
error messages, and inform user.
Otherwise any failure is reported in a message back to the user from
the mailer.
The usage of ARG is defined by the instance that called Message.
It should typically alter the sending method in some way or other."
  (interactive "P" message-mode)
  ;; Make it possible to undo the coming changes.
  (undo-boundary)
  (let ((inhibit-read-only t))
    (put-text-property (point-min) (point-max) 'read-only nil))
  (message-update-smtp-method-header)
  (message-fix-before-sending)
  (run-hooks 'message-send-hook)
  (mml-secure-bcc-is-safe)
  (when message-confirm-send
    (or (y-or-n-p "Send message? ")
	(keyboard-quit)))
  (when (and (not (mml-secure-is-encrypted-p))
	     (mml-secure-is-encrypted-p 'anywhere)
	     (not (yes-or-no-p "This message has a <#secure tag, but is not going to be encrypted.  Send anyway?")))
    (error "Aborting sending"))
  (message message-sending-message)
  (let ((alist message-send-method-alist)
	(success t)
	elem sent dont-barf-on-no-method
	(message-options message-options))
    (message-options-set-recipient)
    (while (and success
		(setq elem (pop alist)))
      (when (funcall (cadr elem))
	(when (and (or (not (memq (car elem)
				  message-sent-message-via))
		       (message-fetch-field "supersedes")
		       (if (or (message-gnksa-enable-p 'multiple-copies)
			       (not (eq (car elem) 'news)))
			   (y-or-n-p
			    (format
			     "Already sent message via %s; resend? "
			     (car elem)))
			 (error "Denied posting -- multiple copies")))
		   (setq success (funcall (caddr elem) arg)))
	  (setq sent t))))
    (unless (or sent
		(not success)
		(let ((fcc (message-fetch-field "Fcc"))
		      (gcc (message-fetch-field "Gcc")))
		  (when (or fcc gcc)
		    (setq dont-barf-on-no-method
			  (or (eq message-allow-no-recipients 'always)
			      (and (not (eq message-allow-no-recipients 'never))
				   (y-or-n-p
				    (format "No receiver, perform %s anyway? "
					    (cond ((and fcc gcc) "Fcc and Gcc")
						  (fcc "Fcc")
						  (t "Gcc"))))))))))
      (error "No methods specified to send by"))
    (when (or dont-barf-on-no-method
	      (and success sent))
      (message-do-fcc)
      (save-excursion
	(run-hooks 'message-sent-hook))
      (message "Sending...done")
      ;; Do ecomplete address snarfing.
      (when (and (message-mail-alias-type-p 'ecomplete)
		 (not message-inhibit-ecomplete))
	(message-put-addresses-in-ecomplete))
      ;; Mark the buffer as unmodified and delete auto-save.
      (set-buffer-modified-p nil)
      (delete-auto-save-file-if-necessary t)
      (message-disassociate-draft)
      ;; Delete other mail buffers and stuff.
      (message-do-send-housekeeping)
      (message-do-actions message-send-actions)
      ;; Return success.
      t)))

(defun message-send-via-mail (arg)
  "Send the current message via mail."
  (message-send-mail arg))

(defun message-send-via-news (arg)
  "Send the current message via news."
  (funcall message-send-news-function arg))

(defmacro message-check (type &rest forms)
  "Eval FORMS if TYPE is to be checked."
  (declare (indent 1) (debug t))
  `(or (message-check-element ,type)
       (save-excursion
	 ,@forms)))

(defun message-text-with-property (prop &optional start end reverse)
  "Return a list of start and end positions where the text has PROP.
START and END bound the search, they default to `point-min' and
`point-max' respectively.  If REVERSE is non-nil, find text which does
not have PROP."
  (unless start
    (setq start (point-min)))
  (unless end
    (setq end (point-max)))
  (let (next regions)
    (if reverse
	(while (and start
		    (setq start (text-property-any start end prop nil)))
	  (setq next (next-single-property-change start prop nil end))
	  (push (cons start (or next end)) regions)
	  (setq start next))
      (while (and start
		  (or (get-text-property start prop)
		      (and (setq start (next-single-property-change
					start prop nil end))
			   (get-text-property start prop))))
	(setq next (text-property-any start end prop nil))
	(push (cons start (or next end)) regions)
	(setq start next)))
    (nreverse regions)))

(defcustom message-bogus-addresses
  '("noreply" "nospam" "invalid" "@.*@" "[^[:ascii:]].*@" "[ \t]")
  "List of regexps of potentially bogus mail addresses.
See `message-check-recipients' how to setup checking.

This list should make it possible to catch typos or warn about
spam-trap addresses.  It doesn't aim to verify strict RFC
conformance."
  :version "26.1"			; @@ -> @.*@
  :group 'message-headers
  :type '(choice
	  (const :tag "None" nil)
	  (list
	   (set :inline t
		(const "noreply")
		(const "nospam")
		(const "invalid")
		(const :tag "duplicate @" "@.*@")
		(const :tag "non-ascii local part" "[^[:ascii:]].*@")
		(const :tag "`_' in domain part" "@.*_")
		(const :tag "whitespace" "[ \t]"))
	   (repeat :inline t
		   :tag "Other"
		   (regexp)))))

(defun message-fix-before-sending ()
  "Do various things to make the message nice before sending it."
  ;; Make sure there's a newline at the end of the message.
  (goto-char (point-max))
  (unless (bolp)
    (insert "\n"))
  ;; Make the hidden headers visible.
  (widen)
  ;; Sort headers before sending the message.
  (message-sort-headers)
  ;; Make invisible text visible.
  ;; It doesn't seem as if this is useful, since the invisible property
  ;; is clobbered by an after-change hook anyhow.
  (message-check 'invisible-text
    (let ((regions (message-text-with-property 'invisible))
	  from to)
      (when regions
	(while regions
	  (setq from (caar regions)
		to (cdar regions)
		regions (cdr regions))
	  (put-text-property from to 'invisible nil)
	  (overlay-put (make-overlay from to) 'face 'highlight))
	(unless (yes-or-no-p
		 "Invisible text found and made visible; continue sending? ")
	  (error "Invisible text found and made visible")))))
  (message-check 'illegible-text
    (let (char found choice nul-chars)
      (goto-char (point-min))
      (setq nul-chars (save-excursion
			(search-forward "\000" nil t)))
      (while (progn
	       (skip-chars-forward mm-7bit-chars)
	       (when (get-text-property (point) 'no-illegible-text)
		 ;; There is a signed or encrypted raw message part
		 ;; that is considered to be safe.
		 (goto-char (or (next-single-property-change
				 (point) 'no-illegible-text)
				(point-max))))
	       (setq char (char-after)))
	(when (or (< char 128)
		  (and enable-multibyte-characters
		       (memq (char-charset char)
			     '(eight-bit-control eight-bit-graphic
						 ;; Emacs 23, Bug#1770:
						 eight-bit
						 control-1))
		       (not (get-text-property
			     (point) 'untranslated-utf-8))))
	  (overlay-put (make-overlay (point) (1+ (point))) 'face 'highlight)
	  (setq found t))
	(forward-char))
      (when found
	(setq choice
	      (car
	       (read-multiple-choice
		(if nul-chars
		    "NUL characters found, which may cause problems.  Continue sending?"
		  "Non-printable characters found.  Continue sending?")
		`((?d "delete" "Remove non-printable characters and send")
		  (?r "replace"
		      ,(format
			"Replace non-printable characters with \"%s\" and send"
			message-replacement-char))
		  (?u "url-encode" "Use URL %hex encoding")
		  (?s "send" "Send as is without removing anything")
		  (?e "edit" "Continue editing")))))
	(if (eq choice ?e)
	  (error "Non-printable characters"))
	(goto-char (point-min))
	(skip-chars-forward mm-7bit-chars)
	(while (not (eobp))
	  (when (let ((char (char-after)))
		  (or (< char 128)
		      (and enable-multibyte-characters
			   ;; FIXME: Wrong for Emacs 23 (unicode) and for
			   ;; things like undecodable utf-8 (in Emacs 21?).
			   ;; Should at least use find-coding-systems-region.
			   ;; -- fx
			   (memq (char-charset char)
				 '(eight-bit-control eight-bit-graphic
						     ;; Emacs 23, Bug#1770:
						     eight-bit
						     control-1))
			   (not (get-text-property
				 (point) 'untranslated-utf-8)))))
	    (cond
	     ((eq choice ?i)
	      (message-kill-all-overlays))
	     ((eq choice ?u)
	      (let ((char (get-byte (point))))
		(delete-char 1)
		(insert (format "%%%x" char))))
	     (t
	      (delete-char 1)
	      (when (eq choice ?r)
		(insert message-replacement-char)))))
	  (forward-char)
	  (skip-chars-forward mm-7bit-chars)))))
  (message-check 'bogus-recipient
    ;; Warn before sending a mail to an invalid address.
    (message-check-recipients)))

(defun message-bogus-recipient-p (recipients)
  "Check if a mail address in RECIPIENTS looks bogus.

RECIPIENTS is a mail header.  Return a list of potentially bogus
addresses.  If none is found, return nil.

An address might be bogus if there's a matching entry in
`message-bogus-addresses'."
  ;; FIXME: How about "foo@subdomain", when the MTA adds ".domain.tld"?
  (let (found)
    (mapc (lambda (address)
	    (setq address (or (cadr address) ""))
	    (when (or (string= "" address)
		      (and message-bogus-addresses
			   (let ((re
				  (if (listp message-bogus-addresses)
				      (mapconcat #'identity
						 message-bogus-addresses
						 "\\|")
				    message-bogus-addresses)))
			     (string-match re address))))
              (push address found)))
	  (mail-extract-address-components recipients t))
    found))

(defun message-check-recipients ()
  "Warn before composing or sending a mail to an invalid address.

This function could be useful in `message-setup-hook'."
  (interactive nil message-mode)
  (save-restriction
    (message-narrow-to-headers)
    (dolist (hdr '("To" "Cc" "Bcc"))
      (let ((addr (message-fetch-field hdr)))
	(when (stringp addr)
	  ;; First check for syntactically invalid addresses.
	  (dolist (address (mail-header-parse-addresses addr t))
	    (unless (mail-header-parse-addresses address)
	      (unless (y-or-n-p
		       (format "Email address %s looks invalid; send anyway?"
			       address))
		(user-error "Invalid address %s" address))))
	  ;; Then check for likely-bogus addresses.
	  (dolist (bog (message-bogus-recipient-p addr))
	    (and bog
		 (not (y-or-n-p
		       (format-message
			"Address `%s'%s might be bogus.  Continue? "
			bog
			;; If the encoded version of the email address
			;; is different from the unencoded version,
			;; then we likely have invisible characters or
			;; the like.  Display the encoded version,
			;; too.
			(let ((encoded (rfc2047-encode-string bog)))
			  (if (string= encoded bog)
			      ""
			    (format " (%s)" encoded))))))
		 (user-error "Bogus address"))))))))

(custom-add-option 'message-setup-hook 'message-check-recipients)

(defun message-add-action (action &rest types)
  "Add ACTION to be performed when doing an exit of type TYPES.
Valid types are `send', `return', `exit', `kill' and `postpone'."
  (while types
    (add-to-list (intern (format "message-%s-actions" (pop types)))
		 action)))

(defun message-delete-action (action &rest types)
  "Delete ACTION from lists of actions performed when doing an exit of type TYPES."
  (let (var)
    (while types
      (set (setq var (intern (format "message-%s-actions" (pop types))))
	   (delq action (symbol-value var))))))

(defun message-do-actions (actions)
  "Perform all actions in ACTIONS."
  ;; Now perform actions on successful sending.
  (dolist (action actions)
    (ignore-errors
      (cond
       ;; A simple function.
       ((functionp action)
	(funcall action))
       ;; Something to be evalled.
       (t
	(eval action t))))))

(defun message-send-mail-partially ()
  "Send mail as message/partial."
  ;; replace the header delimiter with a blank line
  (goto-char (point-min))
  (re-search-forward
   (concat "^" (regexp-quote mail-header-separator) "\n"))
  (replace-match "\n")
  (run-hooks 'message-send-mail-hook)
  (let ((p (goto-char (point-min)))
	(tembuf (message-generate-new-buffer-clone-locals " message temp"))
	(curbuf (current-buffer))
	(id (message-make-message-id)) (n 1)
        plist total header)
    (while (not (eobp))
      (if (< (point-max) (+ p message-send-mail-partially-limit))
	  (goto-char (point-max))
	(goto-char (+ p message-send-mail-partially-limit))
	(beginning-of-line)
	(if (<= (point) p) (forward-line 1))) ;; In case of bad message.
      (push p plist)
      (setq p (point)))
    (setq total (length plist))
    (push (point-max) plist)
    (setq plist (nreverse plist))
    (unwind-protect
	(save-excursion
	  (setq p (pop plist))
	  (while plist
	    (set-buffer curbuf)
	    (copy-to-buffer tembuf p (car plist))
	    (set-buffer tembuf)
	    (goto-char (point-min))
	    (if header
		(progn
		  (goto-char (point-min))
		  (narrow-to-region (point) (point))
		  (insert header))
	      (message-goto-eoh)
	      (setq header (buffer-substring (point-min) (point)))
	      (goto-char (point-min))
	      (narrow-to-region (point) (point))
	      (insert header)
	      (message-remove-header "Mime-Version")
	      (message-remove-header "Content-Type")
	      (message-remove-header "Content-Transfer-Encoding")
	      (message-remove-header "Message-ID")
	      (message-remove-header "Lines")
	      (goto-char (point-max))
	      (insert "Mime-Version: 1.0\n")
	      (setq header (buffer-string)))
	    (goto-char (point-max))
	    (insert (format "Content-Type: message/partial; id=\"%s\"; number=%d; total=%d\n\n"
			    id n total))
	    (forward-char -1)
	    (let ((mail-header-separator ""))
	      (when (memq 'Message-ID message-required-mail-headers)
		(insert "Message-ID: " (message-make-message-id) "\n"))
	      (when (memq 'Lines message-required-mail-headers)
		(insert "Lines: " (message-make-lines) "\n"))
	      (message-goto-subject)
	      (end-of-line)
	      (insert (format " (%d/%d)" n total))
	      (widen)
	      (if message-send-mail-real-function
		  (funcall message-send-mail-real-function)
		(message-multi-smtp-send-mail)))
	    (setq n (+ n 1))
	    (setq p (pop plist))
	    (erase-buffer)))
      (kill-buffer tembuf))))

(declare-function hashcash-wait-async "hashcash" (&optional buffer))

(defun message--check-continuation-headers ()
  (message-check 'continuation-headers
    (goto-char (point-min))
    (while (re-search-forward "^[^ \t\n][^ \t\n:]*[ \t\n]" nil t)
      (goto-char (match-beginning 0))
      (if (y-or-n-p "Fix continuation lines? ")
          (insert " ")
        (forward-line 1)
        (unless (y-or-n-p "Send anyway? ")
          (error "Failed to send the message"))))))

(defun message--send-mail-maybe-partially ()
  (if (or (not message-send-mail-partially-limit)
          (< (buffer-size) message-send-mail-partially-limit)
          (not (message-y-or-n-p
                "The message size is too large, split? "
                t
                "\
The message size, "
                (/ (buffer-size) 1000)
                (substitute-command-keys "KB, is too large.

Some mail gateways (MTA's) bounce large messages.  To avoid the
problem, answer \\`y', and the message will be split into several
smaller pieces, the size of each is about ")
                (/ message-send-mail-partially-limit 1000)
                (substitute-command-keys
                 "KB except the last
one.

However, some mail readers (MUA's) can't read split messages, i.e.,
mails in message/partially format.  Answer \\`n', and the message
will be sent in one piece.

The size limit is controlled by `message-send-mail-partially-limit'.
If you always want Gnus to send messages in one piece, set
`message-send-mail-partially-limit' to nil.
"))))
      (progn
        (message "Sending via mail...")
        (if message-send-mail-real-function
            (funcall message-send-mail-real-function)
          (message-multi-smtp-send-mail)))
    (message-send-mail-partially)))

(defun message-send-mail (&optional _)
  (require 'mail-utils)
  (let* ((tembuf (message-generate-new-buffer-clone-locals " message temp"))
	 (case-fold-search nil)
	 (news (message-news-p))
	 (mailbuf (current-buffer))
	 (message-this-is-mail t)
	 ;; gnus-setup-posting-charset is autoloaded in mml.el (FIXME
	 ;; maybe it should not be), which this file requires.  Hence
	 ;; the fboundp test is always true.  Loading it from gnus-msg
	 ;; loads many Gnus files (Bug#5642).  If
	 ;; gnus-group-posting-charset-alist hasn't been customized,
	 ;; this is just going to return nil anyway.  FIXME it would
	 ;; be good to improve this further, because even if g-g-p-c-a
	 ;; has been customized, that is likely to just be for news.
	 ;; Eg either move the definition from gnus-msg, or separate out
	 ;; the mail and news parts.
	 (message-posting-charset
	  (if (and (fboundp 'gnus-setup-posting-charset)
		   (boundp 'gnus-group-posting-charset-alist))
	      (gnus-setup-posting-charset nil)
	    message-posting-charset))
	 (headers message-required-mail-headers)
	 options)
    (when (and message-generate-hashcash
	       (not (eq message-generate-hashcash 'opportunistic)))
      (message "Generating hashcash...")
      (require 'hashcash)
      ;; Wait for calculations already started to finish...
      (hashcash-wait-async)
      ;; ...and do calculations not already done.  mail-add-payment
      ;; will leave existing X-Hashcash headers alone.
      (mail-add-payment)
      (message "Generating hashcash...done"))
    (save-restriction
      (message-narrow-to-headers)
      ;; Generate the Mail-Followup-To header if the header is not there...
      (if (and (message-subscribed-p)
	       (not (mail-fetch-field "mail-followup-to")))
	  (setq headers
		(cons
		 (cons "Mail-Followup-To" (message-make-mail-followup-to))
		 message-required-mail-headers))
	;; otherwise, delete the MFT header if the field is empty
	(when (equal "" (mail-fetch-field "mail-followup-to"))
	  (message-remove-header "^Mail-Followup-To:")))
      ;; Insert some headers.
      (let ((message-deletable-headers
	     (if news nil message-deletable-headers)))
	(message-generate-headers headers))
      ;; Check continuation headers.
      (message--check-continuation-headers)
      (message--fold-long-headers)
      ;; Let the user do all of the above.
      (run-hooks 'message-header-hook))
    (setq options message-options)
    (unwind-protect
	(with-current-buffer tembuf
	  (erase-buffer)
	  (setq message-options options)
	  ;; Avoid copying text props (except hard newlines).
	  (insert (with-current-buffer mailbuf
		    (mml-buffer-substring-no-properties-except-some
		     (point-min) (point-max))))
	  (message-encode-message-body)
	  (message--cache-encoded mailbuf)
	  (save-restriction
	    (message-narrow-to-headers)
	    ;; We (re)generate the Lines header.
	    (when (memq 'Lines message-required-mail-headers)
	      (message-generate-headers '(Lines)))
	    ;; Remove some headers.
	    (message-remove-header message-ignored-mail-headers t)
            (mail-encode-encoded-word-buffer)
	    ;; Then check for suspicious addresses.
            (dolist (hdr '("To" "Cc" "Bcc"))
              (let ((addr (message-fetch-field hdr)))
	        (when (stringp addr)
	          (dolist (address (mail-header-parse-addresses addr t))
	            (when-let ((warning (textsec-suspicious-p
                                         address 'email-address-header)))
	              (unless (y-or-n-p
		               (format "Suspicious address: %s; send anyway?"
                                       warning))
		        (user-error "Suspicious address %s" address))))))))
	  (goto-char (point-max))
	  ;; require one newline at the end.
	  (or (= (preceding-char) ?\n)
	      (insert ?\n))
	  (message-cleanup-headers)
	  ;; FIXME: we're inserting the courtesy copy after encoding.
	  ;; This is wrong if the courtesy copy string contains
	  ;; non-ASCII characters. -- jh
	  (when
	      (save-restriction
		(message-narrow-to-headers)
		(and news
		     (not (message-fetch-field "List-Post"))
		     (not (message-fetch-field "List-ID"))
		     (or (message-fetch-field "cc")
			 (message-fetch-field "bcc")
			 (message-fetch-field "to"))
		     (let ((content-type (message-fetch-field
					  "content-type")))
		       (and
			(or
			 (not content-type)
			 (string= "text/plain"
				  (car
				   (mail-header-parse-content-type
				    content-type))))
			(not
			 (string= "base64"
				  (message-fetch-field
				   "content-transfer-encoding")))))))
	    (message-insert-courtesy-copy
	     (with-current-buffer mailbuf
	       message-courtesy-message)))
          ;; If this was set, `sendmail-program' takes care of encoding.
          (unless message-inhibit-body-encoding
            ;; Let's make sure we encoded everything in the buffer.
            (cl-assert (save-excursion
                         (goto-char (point-min))
                         (not (re-search-forward "[^\000-\377]" nil t)))))
          (mm-disable-multibyte)
          (message--send-mail-maybe-partially)
	  (setq options message-options))
      (kill-buffer tembuf))
    (set-buffer mailbuf)
    (setq message-options options)
    (push 'mail message-sent-message-via)))

(defun message--cache-encoded (mailbuf)
  ;; Store the encoded buffer data for possible reuse later
  ;; when doing Fcc/Gcc handling.  This avoids having to do
  ;; things like re-GPG-encoding secure parts.
  (let ((encoded (buffer-string)))
    (with-current-buffer mailbuf
      (setq message-encoded-mail-cache encoded))))

(defun message--fold-long-headers ()
  "Fold too-long header lines.
Each line should be no more than 79 characters long."
  (goto-char (point-min))
  (while (not (eobp))
    (if (and (looking-at "[^:]+:")
             (> (- (line-end-position) (point)) 79))
	(goto-char (mail-header-fold-field))
      (forward-line 1))))

(defvar sendmail-program)
(defvar smtpmail-smtp-server)
(defvar smtpmail-smtp-service)
(defvar smtpmail-smtp-user)
(defvar smtpmail-stream-type)
(defvar smtpmail-store-queue-variables)

(defun message-multi-smtp-send-mail ()
  "Send the current buffer to `message-send-mail-function'.
Or, if there's a header that specifies a different method, use
that instead."
  (let ((method (message-field-value "X-Message-SMTP-Method")))
    (if (not method)
	(funcall message-send-mail-function)
      (message-remove-header "X-Message-SMTP-Method")
      (setq method (split-string method))
      (cond
       ((equal (car method) "sendmail")
	(message-send-mail-with-sendmail))
       ((equal (car method) "smtp")
	(require 'smtpmail)
	(let* ((smtpmail-store-queue-variables t)
               (smtpmail-smtp-server (nth 1 method))
	       (service (nth 2 method))
	       (port (string-to-number service))
	       ;; If we're talking to the TLS SMTP port, then force a
	       ;; TLS connection.
	       (smtpmail-stream-type (if (= port 465)
					 'tls
				       smtpmail-stream-type))
	       (smtpmail-smtp-service (if (> port 0) port service))
	       (smtpmail-smtp-user (or (nth 3 method) smtpmail-smtp-user)))
	  (message-smtpmail-send-it)))
       (t
	(error "Unknown method %s" method))))))

(defun message-send-mail-with-sendmail ()
  "Send off the prepared buffer with sendmail."
  (require 'sendmail)
  (let ((errbuf (if message-interactive
		    (message-generate-new-buffer-clone-locals
		     " sendmail errors")
		  0))
	resend-to-addresses delimline)
    (unwind-protect
	(progn
	  (let ((case-fold-search t))
	    (save-restriction
	      (message-narrow-to-headers)
	      (setq resend-to-addresses (message-fetch-field "resent-to")))
	    ;; Change header-delimiter to be what sendmail expects.
	    (goto-char (point-min))
	    (re-search-forward
	     (concat "^" (regexp-quote mail-header-separator) "\n"))
	    (replace-match "\n")
	    (backward-char 1)
	    (setq delimline (point-marker))
	    (run-hooks 'message-send-mail-hook)
	    ;; Insert an extra newline if we need it to work around
	    ;; Sun's bug that swallows newlines.
	    (goto-char (1+ delimline))
	    (when (eval message-mailer-swallows-blank-line t)
	      (newline))
	    (when message-interactive
	      (with-current-buffer errbuf
		(erase-buffer))))
	  (let* ((default-directory "/")
		 (coding-system-for-write message-send-coding-system)
		 (cpr (apply
		       #'call-process-region
		       (append
			(list (point-min) (point-max) sendmail-program
			      nil errbuf nil "-oi")
			message-sendmail-extra-arguments
			;; Always specify who from,
			;; since some systems have broken sendmails.
			;; But some systems are more broken with -f, so
			;; we'll let users override this.
			(and (null message-sendmail-f-is-evil)
			     (list "-f" (message-sendmail-envelope-from)))
			;; These mean "report errors by mail"
			;; and "deliver in background".
			(if (null message-interactive) '("-oem" "-odb"))
			;; Get the addresses from the message
			;; unless this is a resend.
			;; We must not do that for a resend
			;; because we would find the original addresses.
			;; For a resend, include the specific addresses.
			(if resend-to-addresses
			    (list resend-to-addresses)
			  '("-t"))))))
	    (unless (or (null cpr) (and (numberp cpr) (zerop cpr)))
	      (when errbuf
		(pop-to-buffer errbuf)
		(setq errbuf nil))
	      (error "Sending...failed with exit value %d" cpr)))
	  (when message-interactive
	    (with-current-buffer errbuf
	      (goto-char (point-min))
	      (while (re-search-forward "\n+ *" nil t)
		(replace-match "; "))
	      (if (not (zerop (buffer-size)))
		  (error "Sending...failed to %s"
			 (buffer-string))))))
      (when (buffer-live-p errbuf)
	(kill-buffer errbuf)))))

(defun message-send-mail-with-qmail ()
  "Pass the prepared message buffer to qmail-inject.
Refer to the documentation for the variable `message-send-mail-function'
to find out how to use this."
  ;; replace the header delimiter with a blank line
  (goto-char (point-min))
  (re-search-forward
   (concat "^" (regexp-quote mail-header-separator) "\n"))
  (replace-match "\n")
  (run-hooks 'message-send-mail-hook)
  ;; send the message
  (pcase
      (let ((coding-system-for-write message-send-coding-system))
	(apply
	 #'call-process-region (point-min) (point-max)
	 message-qmail-inject-program nil nil nil
	 ;; qmail-inject's default behavior is to look for addresses on the
	 ;; command line; if there're none, it scans the headers.
	 ;; yes, it does The Right Thing w.r.t. Resent-To and its kin.
	 ;;
	 ;; in general, ALL of qmail-inject's defaults are perfect for simply
	 ;; reading a formatted (i. e., at least a To: or Resent-To header)
	 ;; message from stdin.
	 ;;
	 ;; qmail also has the advantage of not having been raped by
	 ;; various vendors, so we don't have to allow for that, either --
	 ;; compare this with message-send-mail-with-sendmail and weep
	 ;; for sendmail's lost innocence.
	 ;;
	 ;; all this is way cool coz it lets us keep the arguments entirely
	 ;; free for -inject-arguments -- a big win for the user and for us
	 ;; since we don't have to play that double-guessing game and the user
	 ;; gets full control (no gestapo'ish -f's, for instance).  --sj
	 (if (functionp message-qmail-inject-args)
	     (funcall message-qmail-inject-args)
	   message-qmail-inject-args)))
    ;; qmail-inject doesn't say anything on its stdout/stderr,
    ;; we have to look at the retval instead
    (0 nil)
    (100 (error "qmail-inject reported permanent failure"))
    (111 (error "qmail-inject reported transient failure"))
    ;; should never happen
    (_   (error "qmail-inject reported unknown failure"))))

(defvar mh-previous-window-config)

(defun message-send-mail-with-mh ()
  "Send the prepared message buffer with mh."
  (let ((mh-previous-window-config nil)
	(name (mh-new-draft-name)))
    (setq buffer-file-name name)
    ;; MH wants to generate these headers itself.
    (when message-mh-deletable-headers
      (let ((headers message-mh-deletable-headers))
	(while headers
	  (goto-char (point-min))
	  (when (re-search-forward
		 (concat "^" (symbol-name (car headers)) ": *") nil t)
	    (delete-line))
	  (pop headers))))
    (run-hooks 'message-send-mail-hook)
    ;; Pass it on to mh.
    (mh-send-letter)))

(defun message-use-send-mail-function ()
  (run-hooks 'message-send-mail-hook)
  (funcall send-mail-function))

(defun message-smtpmail-send-it ()
  "Send the prepared message buffer with `smtpmail-send-it'.
The only difference from `smtpmail-send-it' is that this command
evaluates `message-send-mail-hook' just before sending a message.
It is useful if your ISP requires the POP-before-SMTP
authentication.  See the Gnus manual for details."
  (declare (obsolete message-use-send-mail-function "27.1"))
  (run-hooks 'message-send-mail-hook)
  (smtpmail-send-it))

(defun message-send-mail-with-mailclient ()
  "Send the prepared message buffer with `mailclient-send-it'.
The only difference from `mailclient-send-it' is that this
command evaluates `message-send-mail-hook' just before sending a message."
  (declare (obsolete message-use-send-mail-function "27.1"))
  (run-hooks 'message-send-mail-hook)
  (mailclient-send-it))

(defun message-canlock-generate ()
  "Return a string that is non-trivial to guess.
Do not use this for anything important, it is cryptographically weak."
  (secure-hash 'sha1 'iv-auto 128))

(defvar canlock-password)
(defvar canlock-password-for-verify)

(defun message-canlock-password ()
  "The password used by message for cancel locks.
This is the value of `canlock-password', if that option is non-nil.
Otherwise, generate and save a value for `canlock-password' first."
  (require 'canlock)
  (unless canlock-password
    (customize-save-variable 'canlock-password (message-canlock-generate))
    (setq canlock-password-for-verify canlock-password))
  canlock-password)

(defun message-insert-canlock ()
  (when message-insert-canlock
    (message-canlock-password)
    (canlock-insert-header)))

(autoload 'nnheader-get-report "nnheader")

(declare-function gnus-setup-posting-charset "gnus-msg" (group))

(defun message-send-news (&optional arg)
  (require 'gnus-msg)
  (let* ((tembuf (message-generate-new-buffer-clone-locals " *message temp*"))
	 (case-fold-search nil)
	 (method (if (functionp message-post-method)
		     (funcall message-post-method arg)
		   message-post-method))
	 (newsgroups-field (save-restriction
			    (message-narrow-to-headers-or-head)
			    (message-fetch-field "Newsgroups")))
	 (followup-field (save-restriction
			   (message-narrow-to-headers-or-head)
			   (message-fetch-field "Followup-To")))
	 ;; BUG: We really need to get the charset for each name in the
	 ;; Newsgroups and Followup-To lines to allow crossposting
	 ;; between group names with incompatible character sets.
	 ;; -- Per Abrahamsen <abraham@dina.kvl.dk> 2001-10-08.
	 (group-field-charset
	  (gnus-group-name-charset method newsgroups-field))
	 (followup-field-charset
	  (gnus-group-name-charset method (or followup-field "")))
	 (rfc2047-header-encoding-alist
	  (append (when group-field-charset
		    (list (cons "Newsgroups" group-field-charset)))
		  (when followup-field-charset
		    (list (cons "Followup-To" followup-field-charset)))
		  rfc2047-header-encoding-alist))
	 (messbuf (current-buffer))
	 (message-syntax-checks
	  (if (and arg
		   (listp message-syntax-checks))
	      (cons '(existing-newsgroups . disabled)
		    message-syntax-checks)
	    message-syntax-checks))
	 (message-this-is-news t)
	 (message-posting-charset
	  (gnus-setup-posting-charset newsgroups-field))
	 result)
    (if (not (message-check-news-body-syntax))
	nil
      (save-restriction
	(message-narrow-to-headers)
	;; Insert some headers.
	(message-generate-headers message-required-news-headers)
	(message-insert-canlock)
	;; Let the user do all of the above.
	(run-hooks 'message-header-hook))
      ;; Note: This check will be disabled by the ".*" default value for
      ;; gnus-group-name-charset-group-alist. -- Pa 2001-10-07.
      (when (and group-field-charset
		 (listp message-syntax-checks))
	(setq message-syntax-checks
	      (cons '(valid-newsgroups . disabled)
		    message-syntax-checks)))
      (message-cleanup-headers)
      (if (not (let ((message-post-method method))
		 (message-check-news-syntax)))
	  nil
	(unwind-protect
	    (with-current-buffer tembuf
	      (buffer-disable-undo)
	      (erase-buffer)
	      ;; Avoid copying text props (except hard newlines).
	      (insert
	       (with-current-buffer messbuf
		 (mml-buffer-substring-no-properties-except-some
		  (point-min) (point-max))))
	      (message-encode-message-body)
	      (message--cache-encoded messbuf)
	      ;; Remove some headers.
	      (save-restriction
		(message-narrow-to-headers)
		;; We (re)generate the Lines header.
		(when (memq 'Lines message-required-mail-headers)
		  (message-generate-headers '(Lines)))
		;; Remove some headers.
		(message-remove-header message-ignored-news-headers t)
                (mail-encode-encoded-word-buffer))
	      (goto-char (point-max))
	      ;; require one newline at the end.
	      (or (= (preceding-char) ?\n)
		  (insert ?\n))
	      (let ((case-fold-search t))
		;; Remove the delimiter.
		(goto-char (point-min))
		(re-search-forward
		 (concat "^" (regexp-quote mail-header-separator) "\n"))
		(replace-match "\n")
		(backward-char 1))
	      (run-hooks 'message-send-news-hook)
	      (gnus-open-server method)
	      (message "Sending news via %s..." (gnus-server-string method))
	      (setq result (let ((mail-header-separator ""))
			     (gnus-request-post method))))
	  (kill-buffer tembuf))
	(set-buffer messbuf)
	(if result
	    (push 'news message-sent-message-via)
	  (message "Couldn't send message via news: %s"
		   (nnheader-get-report (car method)))
	  nil)))))

;;;
;;; Header generation & syntax checking.
;;;

(defun message-check-element (type)
  "Return non-nil if this TYPE is not to be checked."
  (if (eq message-syntax-checks 'dont-check-for-anything-just-trust-me)
      t
    (let ((able (assq type message-syntax-checks)))
      (and (consp able)
	   (eq (cdr able) 'disabled)))))

(defun message-check-news-syntax ()
  "Check the syntax of the message."
  (save-excursion
    (save-restriction
      (widen)
      ;; We narrow to the headers and check them first.
      (save-excursion
	(save-restriction
	  (message-narrow-to-headers)
	  (message-check-news-header-syntax))))))

(defun message-check-news-header-syntax ()
  (and
   ;; Check Newsgroups header.
   (message-check 'newsgroups
     (let ((group (message-fetch-field "newsgroups")))
       (or
	(and group
	     (not (string-match "\\`[ \t]*\\'" group)))
	(ignore
	 (message
	  "The newsgroups field is empty or missing.  Posting is denied.")))))
   ;; Check the Subject header.
   (message-check 'subject
     (let* ((case-fold-search t)
	    (subject (message-fetch-field "subject")))
       (or
	(and subject
	     (not (string-match "\\`[ \t]*\\'" subject)))
	(ignore
	 (message
	  "The subject field is empty or missing.  Posting is denied.")))))
   ;; Check for commands in Subject.
   (message-check 'subject-cmsg
     (if (string-match "^cmsg " (message-fetch-field "subject"))
	 (y-or-n-p
	  "The control code \"cmsg\" is in the subject.  Really post? ")
       t))
   ;; Check long header lines.
   (message-check 'long-header-lines
     (let ((header nil)
	   (length 0)
	   found)
       (while (and (not found)
		   (re-search-forward "^\\([^ \t:]+\\): " nil t))
	 (if (> (- (point) (match-beginning 0)) 998)
	     (setq found t
		   length (- (point) (match-beginning 0)))
	   (setq header (match-string-no-properties 1)))
	 (forward-line 1))
       (if found
	   (y-or-n-p (format "Your %s header is too long (%d).  Really post? "
			     header length))
	 t)))
   ;; Check for multiple identical headers.
   (message-check 'multiple-headers
     (let (found)
       (while (and (not found)
		   (re-search-forward "^[^ \t:]+: " nil t))
	 (save-excursion
	   (or (re-search-forward
		(concat "^"
			(regexp-quote
			 (setq found
			       (buffer-substring
				(match-beginning 0) (- (match-end 0) 2))))
			":")
		nil t)
	       (setq found nil))))
       (if found
	   (y-or-n-p (format "Multiple %s headers.  Really post? " found))
	 t)))
   ;; Check for Version and Sendsys.
   (message-check 'sendsys
     (if (re-search-forward "^Sendsys:\\|^Version:" nil t)
	 (y-or-n-p
	  (format "The article contains a %s command.  Really post? "
		  (buffer-substring (match-beginning 0)
				    (1- (match-end 0)))))
       t))
   ;; See whether we can shorten Followup-To.
   (message-check 'shorten-followup-to
     (let ((newsgroups (message-fetch-field "newsgroups"))
	   (followup-to (message-fetch-field "followup-to"))
	   to)
       (when (and newsgroups
		  (string-search "," newsgroups)
		  (not followup-to)
		  (not
		   (zerop
		    (length
		     (setq to (completing-read
                               (format-prompt "Followups to" "no Followup-To header")
			       (mapcar #'list
				       (cons "poster"
					     (message-tokenize-header
					      newsgroups)))))))))
	 (goto-char (point-min))
	 (insert "Followup-To: " to "\n"))
       t))
   ;; Check "Shoot me".
   (message-check 'shoot
     (if (re-search-forward
	  "Message-ID.*.mail-host-address-is-not-set" nil t)
	 (y-or-n-p "You appear to have a misconfigured system.  Really post? ")
       t))
   ;; Check for Approved.
   (message-check 'approved
     (if (re-search-forward "^Approved:" nil t)
	 (y-or-n-p "The article contains an Approved header.  Really post? ")
       t))
   ;; Check the Message-ID header.
   (message-check 'message-id
     (let* ((case-fold-search t)
	    (message-id (message-fetch-field "message-id" t)))
       (or (not message-id)
	   ;; Is there an @ in the ID?
	   (and (string-search "@" message-id)
		;; Is there a dot in the ID?
		(string-match "@[^.]*\\." message-id)
		;; Does the ID end with a dot?
		(not (string-search ".>" message-id)))
	   (y-or-n-p
	    (format "The Message-ID looks strange: \"%s\".  Really post? "
		    message-id)))))
   ;; Check the Newsgroups & Followup-To headers.
   (message-check 'existing-newsgroups
     (let* ((case-fold-search t)
	    (newsgroups (message-fetch-field "newsgroups"))
	    (followup-to (message-fetch-field "followup-to"))
	    (groups (message-tokenize-header
		     (if followup-to
			 (concat newsgroups "," followup-to)
		       newsgroups)))
	    (post-method (if (functionp message-post-method)
			     (funcall message-post-method)
			   message-post-method))
	    ;; KLUDGE to handle nnvirtual groups.  Doing this right
	    ;; would probably involve a new nnoo function.
	    ;; -- Per Abrahamsen <abraham@dina.kvl.dk>, 2001-10-17.
	    (method (if (and (consp post-method)
			     (eq (car post-method) 'nnvirtual)
			     gnus-message-group-art)
			(let ((group (car (nnvirtual-find-group-art
					   (car gnus-message-group-art)
					   (cdr gnus-message-group-art)))))
			  (gnus-find-method-for-group group))
		      post-method))
	    (known-groups
	     (mapcar (lambda (n)
		       (gnus-group-name-decode
			(gnus-group-real-name n)
			(gnus-group-name-charset method n)))
		     (gnus-groups-from-server method)))
	    errors)
       (while groups
	 (when (and (not (equal (car groups) "poster"))
		    (not (member (car groups) known-groups))
		    (not (member (car groups) errors)))
	   (push (car groups) errors))
	 (pop groups))
       (cond
	;; Gnus is not running.
	((or (not (and (boundp 'gnus-active-hashtb)
		       gnus-active-hashtb))
	     (not (boundp 'gnus-read-active-file)))
	 t)
	;; We don't have all the group names.
	((and (or (not gnus-read-active-file)
		  (eq gnus-read-active-file 'some))
	      errors)
	 (y-or-n-p
	  (format
	   "Really use %s possibly unknown group%s: %s? "
	   (if (= (length errors) 1) "this" "these")
	   (if (= (length errors) 1) "" "s")
	   (mapconcat #'identity errors ", "))))
	;; There were no errors.
	((not errors)
	 t)
	;; There are unknown groups.
	(t
	 (y-or-n-p
	  (format
	   "Really post to %s unknown group%s: %s? "
	   (if (= (length errors) 1) "this" "these")
	   (if (= (length errors) 1) "" "s")
	   (mapconcat #'identity errors ", ")))))))
   (progn (message--check-continuation-headers) t)
   ;; Check the Newsgroups & Followup-To headers for syntax errors.
   (message-check 'valid-newsgroups
     (let ((case-fold-search t)
	   (headers '("Newsgroups" "Followup-To"))
	   header error)
       (while (and headers (not error))
	 (when (setq header (mail-fetch-field (car headers)))
	   (if (or
		(not
		 (string-match
		  "\\`\\([-+_&.a-zA-Z0-9]+\\)?\\(,[-+_&.a-zA-Z0-9]+\\)*\\'"
		  header))
		(memq
		 nil (mapcar
		      (lambda (g)
			(not (string-match "\\.\\'\\|\\.\\." g)))
		      (message-tokenize-header header ","))))
	       (setq error t)))
	 (unless error
	   (pop headers)))
       (if (not error)
	   t
	 (y-or-n-p
	  (format "The %s header looks odd: \"%s\".  Really post? "
		  (car headers) header)))))
   (message-check 'repeated-newsgroups
     (let ((case-fold-search t)
	   (headers '("Newsgroups" "Followup-To"))
	   header error groups group)
       (while (and headers
		   (not error))
	 (when (setq header (mail-fetch-field (pop headers)))
	   (setq groups (message-tokenize-header header ","))
	   (while (setq group (pop groups))
	     (when (member group groups)
	       (setq error group
		     groups nil)))))
       (if (not error)
	   t
	 (y-or-n-p
	  (format "Group %s is repeated in headers.  Really post? " error)))))
   ;; Check the From header.
   (message-check 'from
     (let* ((case-fold-search t)
	    (from (message-fetch-field "from"))
	    ad)
       (cond
	((not from)
	 (message "There is no From line.  Posting is denied.")
	 nil)
	((or (not (string-match
		   "@[^\\.]*\\."
		   (setq ad (nth 1 (mail-extract-address-components
				    from))))) ;larsi@ifi
	     (string-search ".." ad)	;larsi@ifi..uio
	     (string-search "@." ad)	;larsi@.ifi.uio
	     (string-match "\\.$" ad)	;larsi@ifi.uio.
	     (not (string-match "^[^@]+@[^@]+$" ad)) ;larsi.ifi.uio
	     (string-match "(.*).*(.*)" from)) ;(lars) (lars)
	 (message
	  "Denied posting -- the From looks strange: \"%s\"." from)
	 nil)
	((let ((addresses (rfc822-addresses from)))
	   ;; `rfc822-addresses' returns a string if parsing fails.
	   (while (and (consp addresses)
		       (not (eq (string-to-char (car addresses)) ?\()))
	     (setq addresses (cdr addresses)))
	   addresses)
	 (message
	  "Denied posting -- bad From address: \"%s\"." from)
	 nil)
	(t t))))
   ;; Check the Reply-To header.
   (message-check 'reply-to
     (let* ((case-fold-search t)
	    (reply-to (message-fetch-field "reply-to"))
	    ad)
       (cond
	((not reply-to)
	 t)
	((string-search "," reply-to)
	 (y-or-n-p
	  (format "Multiple Reply-To addresses: \"%s\". Really post? "
		  reply-to)))
	((or (not (string-match
		   "@[^\\.]*\\."
		   (setq ad (nth 1 (mail-extract-address-components
				    reply-to))))) ;larsi@ifi
	     (string-search ".." ad)	;larsi@ifi..uio
	     (string-search "@." ad)	;larsi@.ifi.uio
	     (string-match "\\.$" ad)	;larsi@ifi.uio.
	     (not (string-match "^[^@]+@[^@]+$" ad)) ;larsi.ifi.uio
	     (string-match "(.*).*(.*)" reply-to)) ;(lars) (lars)
	 (y-or-n-p
	  (format
	   "The Reply-To looks strange: \"%s\". Really post? "
	   reply-to)))
	(t t))))))

(defun message-check-news-body-syntax ()
  (and
   ;; Check for long lines.
   (message-check 'long-lines
     (goto-char (point-min))
     (re-search-forward
      (concat "^" (regexp-quote mail-header-separator) "$"))
     (forward-line 1)
     (while (and
	     (or (looking-at
		  "<#\\(/\\)?\\(multipart\\|part\\|external\\|mml\\)")
		 (let ((p (point)))
		   (end-of-line)
		   (< (- (point) p) 80)))
	     (zerop (forward-line 1))))
     (or (bolp)
	 (eobp)
	 (y-or-n-p
	  "You have lines longer than 79 characters.  Really post? ")))
   ;; Check whether the article is empty.
   (message-check 'empty
     (goto-char (point-min))
     (re-search-forward
      (concat "^" (regexp-quote mail-header-separator) "$"))
     (forward-line 1)
     (let ((b (point)))
       (goto-char (point-max))
       (re-search-backward message-signature-separator nil t)
       (beginning-of-line)
       (or (re-search-backward "[^ \n\t]" b t)
	   (if (message-gnksa-enable-p 'empty-article)
	       (y-or-n-p "Empty article.  Really post? ")
	     (message "Denied posting -- Empty article.")
	     nil))))
   ;; Check for control characters.
   (message-check 'control-chars
     (if (re-search-forward
	  (eval-when-compile
            (decode-coding-string "[\000-\007\013\015-\032\034-\037\200-\237]"
                                  'binary))
	  nil t)
	 (y-or-n-p
	  "The article contains control characters.  Really post? ")
       t))
   ;; Check excessive size.
   (message-check 'size
     (if (> (buffer-size) 60000)
	 (y-or-n-p
	  (format "The article is %d octets long.  Really post? "
		  (buffer-size)))
       t))
   ;; Check whether any new text has been added.
   (message-check 'new-text
     (or
      (not message-checksum)
      (not (equal (message-checksum) message-checksum))
      (if (message-gnksa-enable-p 'quoted-text-only)
	  (y-or-n-p
	   "It looks like no new text has been added.  Really post? ")
	(message "Denied posting -- no new text has been added.")
	nil)))
   ;; Check the length of the signature.
   (message-check 'signature
     (let (sig-start sig-end)
       (goto-char (point-max))
       (if (not (re-search-backward message-signature-separator nil t))
	   t
         (setq sig-start (1+ (line-end-position)))
	 (setq sig-end
	       (if (re-search-forward
		    "<#/?\\(multipart\\|part\\|external\\|mml\\)" nil t)
                   (- (line-beginning-position) 1)
		 (point-max)))
	 (if (>= (count-lines sig-start sig-end) 5)
	     (if (message-gnksa-enable-p 'signature)
		 (y-or-n-p
		  (format "Signature is excessively long (%d lines).  Really post? "
			  (count-lines sig-start sig-end)))
	       (message "Denied posting -- Excessive signature.")
	       nil)
	   t))))
   ;; Ensure that text follows last quoted portion.
   (message-check 'quoting-style
     (goto-char (point-max))
     (let ((no-problem t))
       (when (search-backward-regexp "^>[^\n]*\n" nil t)
	 (setq no-problem (search-forward-regexp "^[ \t]*[^>\n]" nil t)))
       (if no-problem
	   t
	 (if (message-gnksa-enable-p 'quoted-text-only)
	     (y-or-n-p "Your text should follow quoted text.  Really post? ")
	   ;; Ensure that
	   (goto-char (point-min))
	   (re-search-forward
	    (concat "^" (regexp-quote mail-header-separator) "$"))
	   (if (search-forward-regexp "^[ \t]*[^>\n]" nil t)
	       (y-or-n-p "Your text should follow quoted text.  Really post? ")
	     (message "Denied posting -- only quoted text.")
	     nil)))))))

(defun message--rotate-fixnum-left (n)
  "Rotate the fixnum N left by one bit in a fixnum word.
The result is a fixnum."
  (logior (if (natnump n) 0 1)
	  (ash (cond ((< (ash most-positive-fixnum -1) n)
		      (logior n most-negative-fixnum))
		     ((< n (ash most-negative-fixnum -1))
		      (logand n most-positive-fixnum))
		     (n))
	       1)))

(defun message-checksum ()
  "Return a \"checksum\" for the current buffer."
  (let ((sum 0))
    (save-excursion
      (goto-char (point-min))
      (re-search-forward
       (concat "^" (regexp-quote mail-header-separator) "$"))
      (while (not (eobp))
	(when (not (looking-at "[ \t\n]"))
	  (setq sum (logxor (message--rotate-fixnum-left sum)
			    (char-after))))
	(forward-char 1)))
    sum))

(defun message-do-fcc ()
  "Process Fcc headers in the current buffer."
  (let ((case-fold-search t)
	(buf (current-buffer))
	(encoded-cache message-encoded-mail-cache)
	(mml-externalize-attachments message-fcc-externalize-attachments)
	(file (message-field-value "fcc" t))
	list)
    (when file
      (with-temp-buffer
	(insert-buffer-substring buf)
	(message-clone-locals buf)
	;; Avoid re-doing things like GPG-encoding secret parts.
	(if (not encoded-cache)
	    (message-encode-message-body)
	  (erase-buffer)
	  (insert encoded-cache))
	(save-restriction
	  (message-narrow-to-headers)
	  (while (setq file (message-fetch-field "fcc" t))
	    (push file list)
	    (message-remove-header "fcc" nil t))
          (let ((rfc2047-header-encoding-alist
		 (cons '("Newsgroups" . default)
		       rfc2047-header-encoding-alist)))
	    (mail-encode-encoded-word-buffer)))
	(goto-char (point-min))
	(when (re-search-forward
	       (concat "^" (regexp-quote mail-header-separator) "$")
	       nil t)
	  (replace-match "" t t ))
	;; Process Fcc operations.
	(while list
	  (setq file (pop list))
	  (if (string-match "^[ \t]*|[ \t]*\\(.*\\)[ \t]*$" file)
	      ;; Pipe the article to the program in question.
	      (call-shell-region (point-min) (point-max) (match-string 1 file))
	    ;; Save the article.
	    (setq file (expand-file-name file))
	    (unless (file-exists-p (file-name-directory file))
	      (make-directory (file-name-directory file) t))
	    (if (and message-fcc-handler-function
		     (not (eq message-fcc-handler-function 'rmail-output)))
		(funcall message-fcc-handler-function file)
	      ;; FIXME this option, rmail-output (also used if
	      ;; message-fcc-handler-function is nil) is not
	      ;; documented anywhere AFAICS.  It should work in Emacs
	      ;; 23; I suspect it does not work in Emacs 22.
	      ;; FIXME I don't see the need for the two different cases here.
	      ;; mail-use-rfc822 makes no difference (in Emacs 23),and
	      ;; the third argument just controls \"Wrote file\" message.
	      (if (and (file-readable-p file) (mail-file-babyl-p file))
		  (rmail-output file 1 nil t)
		(let ((mail-use-rfc822 t))
		  (rmail-output file 1 t t))))))))))

(defun message-output (filename)
  "Append this article to Unix/babyl mail file FILENAME."
  (if (or (and (file-readable-p filename)
	       (mail-file-babyl-p filename))
	  ;; gnus-output-to-mail does the wrong thing with live, mbox
	  ;; Rmail buffers in Emacs 23.
          ;; https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=597255
	  (let ((buff (find-buffer-visiting filename)))
	    (and buff (with-current-buffer buff
			(eq major-mode 'rmail-mode)))))
      (gnus-output-to-rmail filename t)
    (gnus-output-to-mail filename t)))

(defun message-cleanup-headers ()
  "Do various automatic cleanups of the headers."
  ;; Remove empty lines in the header.
  (save-restriction
    (message-narrow-to-headers)
    ;; Remove blank lines.
    (while (re-search-forward "^[ \t]*\n" nil t)
      (replace-match "" t t))

    ;; Correct Newsgroups and Followup-To headers:  Change sequence of
    ;; spaces to comma and eliminate spaces around commas.  Eliminate
    ;; embedded line breaks.
    (goto-char (point-min))
    (while (re-search-forward "^\\(Newsgroups\\|Followup-To\\): +" nil t)
      (save-restriction
	(narrow-to-region
	 (point)
	 (if (re-search-forward "^[^ \t]" nil t)
	     (match-beginning 0)
	   (forward-line 1)
	   (point)))
	(goto-char (point-min))
	(while (re-search-forward "\n[ \t]+" nil t)
	  (replace-match " " t t))     ;No line breaks (too confusing)
	(goto-char (point-min))
	(while (re-search-forward "[ \t\n]*,[ \t\n]*\\|[ \t]+" nil t)
	  (replace-match "," t t))
	(goto-char (point-min))
	;; Remove trailing commas.
	(when (re-search-forward ",+$" nil t)
	  (replace-match "" t t))))))

(defun message-make-date (&optional now)
  "Make a valid data header.
If NOW, use that time instead."
  (let ((system-time-locale "C"))
    (format-time-string "%a, %d %b %Y %T %z" now)))

(defun message-insert-expires (days)
  "Insert the Expires header.  Expiry in DAYS days."
  (interactive "NExpire article in how many days? " message-mode)
  (save-excursion
    (message-position-on-field "Expires" "X-Draft-From")
    (insert (message-make-expires-date days))))

(defun message-make-expires-date (days)
  "Make date string for the Expires header.  Expiry in DAYS days.

In posting styles use `(\"Expires\" (make-expires-date 30))'."
  (let* ((cur (decode-time nil nil 'integer))
	 (nday (+ days (decoded-time-day cur))))
    (setf (decoded-time-day cur) nday)
    (message-make-date (encode-time cur))))

(defun message-make-message-id ()
  "Make a unique Message-ID."
  (concat "<" (message-unique-id)
	  (let ((psubject (save-excursion (message-fetch-field "subject")))
		(psupersedes
		 (save-excursion (message-fetch-field "supersedes"))))
	    (if (or
		 (and message-reply-headers
		      (mail-header-references message-reply-headers)
		      (mail-header-subject message-reply-headers)
		      psubject
		      (not (string=
			    (message-strip-subject-re
			     (mail-header-subject message-reply-headers))
			    (message-strip-subject-re psubject))))
		 (and psupersedes
		      (string-search "_-_@" psupersedes)))
		"_-_" ""))
	  "@" (message-make-fqdn) ">"))

(defvar message-unique-id-char nil)

;; If you ever change this function, make sure the new version
;; cannot generate IDs that the old version could.
;; You might for example insert a "." somewhere (not next to another dot
;; or string boundary), or modify the "fsf" string.
(defun message-unique-id ()
  ;; Don't use fractional seconds from timestamp; they may be unsupported.
  ;; Instead we use this randomly inited counter.
  (setq message-unique-id-char
	;; 2^16 * 25 just fits into 4 digits i base 36.
	(let ((base (* 25 25)))
	  (if message-unique-id-char
	      (% (1+ message-unique-id-char) base)
	    (random base))))
  (let ((tm (time-convert nil 'integer)))
    (concat
     (if (or (eq system-type 'ms-dos)
	     ;; message-number-base36 doesn't handle bigints.
	     (floatp (user-uid)))
	 (let ((user (downcase (user-login-name))))
	   (while (string-match "[^a-z0-9_]" user)
	     (aset user (match-beginning 0) ?_))
	   user)
       (message-number-base36 (user-uid) -1))
     (message-number-base36 (+ (ash tm -16)
			       (ash (% message-unique-id-char 25) 16))
			    4)
     (message-number-base36 (+ (logand tm #xffff)
			       (ash (/ message-unique-id-char 25) 16))
			    4)
     ;; Append a given name, because while the generated ID is unique
     ;; to this newsreader, other newsreaders might otherwise generate
     ;; the same ID via another algorithm.
     ".fsf")))

(defun message-number-base36 (num len)
  (if (if (< len 0)
	  (<= num 0)
	(= len 0))
      ""
    (concat (message-number-base36 (/ num 36) (1- len))
	    (char-to-string (aref "zyxwvutsrqponmlkjihgfedcba9876543210"
				  (% num 36))))))

(defun message-make-organization ()
  "Make an Organization header."
  (let* ((organization
	  (when message-user-organization
	    (if (functionp message-user-organization)
		(funcall message-user-organization)
	      message-user-organization))))
    (with-temp-buffer
      (mm-enable-multibyte)
      (cond ((stringp organization)
	     (insert organization))
	    ((and (eq t organization)
		  message-user-organization-file
		  (file-exists-p message-user-organization-file))
	     (insert-file-contents message-user-organization-file)))
      (goto-char (point-min))
      (while (re-search-forward "[\t\n]+" nil t)
	(replace-match "" t t))
      (unless (zerop (buffer-size))
	(buffer-string)))))

(defun message-make-lines ()
  "Count the number of lines and return numeric string."
  (save-excursion
    (save-restriction
      (widen)
      (message-goto-body)
      (int-to-string (count-lines (point) (point-max))))))

(defun message-make-references ()
  "Return the References header for this message."
  (when message-reply-headers
    (let ((message-id (mail-header-id message-reply-headers))
	  (references (mail-header-references message-reply-headers)))
      (if (or references message-id)
	  (concat (or references "") (and references " ")
		  (or message-id ""))
	nil))))

(defun message-make-in-reply-to ()
  "Return the In-Reply-To header for this message."
  (when message-reply-headers
    (let ((from (mail-header-from message-reply-headers))
	  (date (mail-header-date message-reply-headers))
	  (msg-id (mail-header-id message-reply-headers)))
      (when from
	(let ((name (mail-extract-address-components from)))
	  (concat
	   msg-id (if msg-id " (")
	   (if (car name)
	       (if (string-match "[^[:ascii:]]" (car name))
		   ;; Quote a string containing non-ASCII characters.
		   ;; It will make the RFC2047 encoder cause an error
		   ;; if there are special characters.
                   (mm-with-multibyte-buffer
                     (insert (car name))
                     (goto-char (point-min))
                     (while (search-forward "\"" nil t)
                       (when (prog2
                                 (backward-char)
                                 (zerop (% (skip-chars-backward "\\\\") 2))
                               (goto-char (match-beginning 0)))
                         (insert "\\"))
                       (forward-char))
                     ;; Those quotes will be removed by the RFC2047 encoder.
                     (concat "\"" (buffer-string) "\""))
		 (car name))
	     (nth 1 name))
	   "'s message of \""
	   (if (or (not date) (string= date ""))
	       "(unknown date)" date)
	   "\"" (if msg-id ")")))))))

(defun message-make-distribution ()
  "Make a Distribution header."
  (let ((orig-distribution (message-fetch-reply-field "distribution")))
    (cond ((functionp message-distribution-function)
	   (funcall message-distribution-function))
	  (t orig-distribution))))

(defun message-make-expires ()
  "Return an Expires header based on `message-expires'."
  (let ((future (* 60 60 24 message-expires)))
    ;; Add the future to current.
    (message-make-date (time-add nil future))))

(defun message-make-path ()
  "Return uucp path."
  (let ((login-name (user-login-name)))
    (cond ((null message-user-path)
	   (concat (system-name) "!" login-name))
	  ((stringp message-user-path)
	   ;; Support GENERICPATH.  Suggested by vixie@decwrl.dec.com.
	   (concat message-user-path "!" login-name))
	  (t login-name))))

(defun message-make-from (&optional name address)
  "Make a From header."
  (let* ((style message-from-style)
	 (login (or address (message-make-address)))
	 (fullname (or name user-full-name (user-full-name))))
    (when (string= fullname "&")
      (setq fullname (user-login-name)))
    (with-temp-buffer
      (mm-enable-multibyte)
      (cond
       ((or (null style)
	    (equal fullname ""))
	(insert login))
       ((or (eq style 'angles)
	    (and (not (eq style 'parens))
		 ;; Use angles if no quoting is needed, or if parens would
		 ;; need quoting too.
		 (or (not (string-match "[^- !#-'*+/-9=?A-Z^-~]" fullname))
		     (let ((tmp (concat fullname nil)))
		       (while (string-match "([^()]*)" tmp)
			 (aset tmp (match-beginning 0) ?-)
			 (aset tmp (1- (match-end 0)) ?-))
		       (string-match "[\\()]" tmp)))))
	(insert fullname)
	(goto-char (point-min))
	;; Look for a character that cannot appear unquoted
	;; according to RFC 822 (or later).
	(when (re-search-forward "[^- !#-'*+/-9=?A-Z^-~]" nil 1)
	  ;; Quote fullname, escaping specials.
	  (goto-char (point-min))
	  (insert "\"")
	  (while (re-search-forward "[\"\\]" nil 1)
	    (replace-match "\\\\\\&" t))
	  (insert "\""))
	(insert " <" login ">"))
       (t				; 'parens or default
	(insert login " (")
	(let ((fullname-start (point)))
	  (insert fullname)
	  (goto-char fullname-start)
	  ;; \ and nonmatching parentheses must be escaped in comments.
	  ;; Escape every instance of ()\ ...
	  (while (re-search-forward "[()\\]" nil 1)
	    (replace-match "\\\\\\&" t))
	  ;; ... then undo escaping of matching parentheses,
	  ;; including matching nested parentheses.
	  (goto-char fullname-start)
	  (while (re-search-forward
		  "\\(\\=\\|[^\\]\\(\\\\\\\\\\)*\\)\\\\(\\(\\([^\\]\\|\\\\\\\\\\)*\\)\\\\)"
		  nil 1)
	    (replace-match "\\1(\\3)" t)
	    (goto-char fullname-start)))
	(insert ")")))
      (buffer-string))))

(defun message-make-sender ()
  "Return the \"real\" user address.
This function tries to ignore all user modifications, and
give as trustworthy answer as possible."
  (concat (user-login-name) "@" (system-name)))

(defun message-make-address ()
  "Make the address of the user."
  (or (message-user-mail-address)
      (concat (user-login-name) "@" (message-make-domain))))

(defun message-user-mail-address ()
  "Return the pertinent part of `user-mail-address'."
  (when (and user-mail-address
	     (string-match "@.*\\." user-mail-address))
    (if (string-search " " user-mail-address)
	(nth 1 (mail-extract-address-components user-mail-address))
      user-mail-address)))

(defun message-sendmail-envelope-from ()
  "Return the envelope from."
  (cond ((eq (message--sendmail-envelope-from) 'header)
	 (nth 1 (mail-extract-address-components
		 (message-fetch-field "from"))))
	((stringp (message--sendmail-envelope-from))
	 (message--sendmail-envelope-from))
	(t
	 (message-make-address))))

(defun message-make-fqdn ()
  "Return user's fully qualified domain name."
  (let* ((sysname (system-name))
	 (user-mail (message-user-mail-address))
	 (user-domain
	  (if (and user-mail
		   (string-match "@\\(.*\\)\\'" user-mail))
	      (match-string 1 user-mail)))
	 (case-fold-search t))
    (cond
     ((and message-user-fqdn
	   (stringp message-user-fqdn)
	   (not (string-match message-bogus-system-names message-user-fqdn)))
      ;; `message-user-fqdn' seems to be valid
      message-user-fqdn)
     ;; A system name without any dots is unlikely to be a good fully
     ;; qualified domain name.
     ((and (string-search "." sysname)
	   (not (string-match message-bogus-system-names sysname)))
      ;; `system-name' returned the right result.
      sysname)
     ;; Try `mail-host-address'.
     ((and (stringp mail-host-address)
	   (not (string-match message-bogus-system-names mail-host-address)))
      mail-host-address)
     ;; We try `user-mail-address' as a backup.
     ((and user-domain
	   (stringp user-domain)
	   (not (string-match message-bogus-system-names user-domain)))
      user-domain)
     ;; Default to this bogus thing.
     (t
      (concat sysname ".mail-host-address-is-not-set")))))

(defun message-make-domain ()
  "Return the domain name."
  (or mail-host-address
      (message-make-fqdn)))

(defun message-to-list-only ()
  "Send a message to the list only.
Remove all addresses but the list address from To and Cc headers."
  (interactive nil message-mode)
  (let ((listaddr (message-make-mail-followup-to t)))
    (when listaddr
      (save-excursion
	(message-remove-header "to")
	(message-remove-header "cc")
	(message-position-on-field "To" "X-Draft-From")
	(insert listaddr)))))

(defun message-make-mail-followup-to (&optional only-show-subscribed)
  "Return the Mail-Followup-To header.
If passed the optional argument ONLY-SHOW-SUBSCRIBED only return the
subscribed address (and not the additional To and Cc header contents)."
  (let* ((case-fold-search t)
	 (to (message-fetch-field "To"))
	 (cc (message-fetch-field "cc"))
	 (msg-recipients (concat to (and to cc ", ") cc))
	 (recipients
	  (mapcar #'mail-strip-quoted-names
		  (message-tokenize-header msg-recipients)))
	 (file-regexps
	  (if message-subscribed-address-file
	      (let (begin end item re)
		(save-excursion
		  (with-temp-buffer
		    (insert-file-contents message-subscribed-address-file)
		    (while (not (eobp))
		      (setq begin (point))
		      (forward-line 1)
		      (setq end (point))
		      (if (bolp) (setq end (1- end)))
		      (setq item (regexp-quote (buffer-substring begin end)))
		      (if re (setq re (concat re "\\|" item))
			(setq re (concat "\\`\\(" item))))
		    (and re (list (concat re "\\)\\'"))))))))
	 (mft-regexps (apply #'append message-subscribed-regexps
			     (mapcar #'regexp-quote
				     message-subscribed-addresses)
			     file-regexps
			     (mapcar #'funcall
				     message-subscribed-address-functions))))
    (save-match-data
      (let ((list
	     (cl-loop for recipient in recipients
	              when (cl-loop for regexp in mft-regexps
		                    thereis (string-match regexp recipient))
	              return recipient)))
	(when list
	  (if only-show-subscribed
	      list
	    msg-recipients))))))

(defun message-idna-to-ascii-rhs-1 (header)
  "Interactively potentially IDNA encode domain names in HEADER."
  (let ((field (message-fetch-field header))
        ace)
    (when field
      (dolist (rhs
	       (delete-dups
		(mapcar (lambda (rhs) (or (cadr (split-string rhs "@")) ""))
			(mapcar #'downcase
				(mapcar
				 (lambda (elem)
				   (or (cadr elem)
				       ""))
				 (mail-extract-address-components field t))))))
	;; Note that `rhs' will be "" if the address does not have
	;; the domain part, i.e., if it is a local user's address.
	(setq ace (if (string-match "\\`[[:ascii:]]*\\'" rhs)
		      rhs
		    (downcase (puny-encode-domain rhs))))
	(when (and (not (equal rhs ace))
		   (or (not (eq message-use-idna 'ask))
		       (y-or-n-p (format "Replace %s with %s in %s:? "
					 rhs ace header))))
	  (goto-char (point-min))
	  (while (re-search-forward (concat "^" header ":") nil t)
	    (message-narrow-to-field)
	    (while (search-forward (concat "@" rhs) nil t)
	      (replace-match (concat "@" ace) t t))
	    (goto-char (point-max))
	    (widen)))))))

(defun message-idna-to-ascii-rhs ()
  "Possibly IDNA encode non-ASCII domain names in From:, To: and Cc: headers.
See `message-idna-encode'."
  (interactive nil message-mode)
  (when message-use-idna
    (save-excursion
      (save-restriction
	;; `message-narrow-to-head' that recognizes only the first empty
	;; line as the message header separator used to be used here.
	;; However, since there is the "--text follows this line--" line
	;; normally, it failed in narrowing to the headers and potentially
	;; caused the IDNA encoding on lines that look like headers in
	;; the message body.
	(message-narrow-to-headers-or-head)
	(message-idna-to-ascii-rhs-1 "From")
	(message-idna-to-ascii-rhs-1 "To")
	(message-idna-to-ascii-rhs-1 "Reply-To")
	(message-idna-to-ascii-rhs-1 "Mail-Reply-To")
	(message-idna-to-ascii-rhs-1 "Mail-Followup-To")
	(message-idna-to-ascii-rhs-1 "Cc")))))

(defun message-generate-headers (headers)
  "Prepare article HEADERS.
Headers already prepared in the buffer are not modified."
  (setq headers (append headers message-required-headers))
  (save-restriction
    (message-narrow-to-headers)
    (let* ((header-values
	    (list 'Date (message-make-date)
		  'Message-ID (message-make-message-id)
		  'Organization (message-make-organization)
		  'From (message-make-from)
		  'Path (message-make-path)
		  'Subject nil
		  'Newsgroups nil
		  'In-Reply-To (message-make-in-reply-to)
		  'References (message-make-references)
		  'To nil
		  'Distribution (message-make-distribution)
		  'Lines (message-make-lines)
		  'User-Agent message-newsreader
		  'Expires (message-make-expires)))
	   (case-fold-search t)
	   (optionalp nil)
	   header value elem header-string)
      ;; First we remove any old generated headers.
      (let ((headers message-deletable-headers))
	(unless (buffer-modified-p)
	  (setq headers (delq 'Message-ID (copy-sequence headers))))
	(while headers
	  (goto-char (point-min))
	  (and (re-search-forward
		(concat "^" (symbol-name (car headers)) ": *") nil t)
	       (get-text-property (1+ (match-beginning 0)) 'message-deletable)
	       (delete-line))
	  (pop headers)))
      ;; Go through all the required headers and see if they are in the
      ;; articles already.  If they are not, or are empty, they are
      ;; inserted automatically - except for Subject, Newsgroups and
      ;; Distribution.
      (while headers
	(goto-char (point-min))
	(setq elem (pop headers))
	(if (consp elem)
	    (if (eq (car elem) 'optional)
		(setq header (cdr elem)
		      optionalp t)
	      (setq header (car elem)))
	  (setq header elem))
	(setq header-string  (if (stringp header)
				 header
			       (symbol-name header)))
	(when (or (not (re-search-forward
			(concat "^"
				(regexp-quote (downcase header-string))
				":")
			nil t))
		  (progn
		    ;; The header was found.  We insert a space after the
		    ;; colon, if there is none.
		    (if (/= (char-after) ? ) (insert " ") (forward-char 1))
		    ;; Find out whether the header is empty.
		    (looking-at "[ \t]*\n[^ \t]")))
	  ;; So we find out what value we should insert.
	  (setq value
		(cond
		 ((and (consp elem)
		       (eq (car elem) 'optional)
		       (not (member header-string message-inserted-headers)))
		  ;; This is an optional header.  If the cdr of this
		  ;; is something that is nil, then we do not insert
		  ;; this header.
		  (setq header (cdr elem))
		  (or (and (functionp (cdr elem))
			   (funcall (cdr elem)))
		      (and (symbolp (cdr elem))
			   (plist-get header-values (cdr elem)))))
		 ((consp elem)
		  ;; The element is a cons.  Either the cdr is a
		  ;; string to be inserted verbatim, or it is a
		  ;; function, and we insert the value returned from
		  ;; this function.
		  (or (and (stringp (cdr elem))
			   (cdr elem))
		      (and (functionp (cdr elem))
			   (funcall (cdr elem)))))
		 ((and (symbolp header)
		       (plist-member header-values header))
		  ;; The element is a symbol.  We insert the value of
		  ;; this symbol, if any.
		  (plist-get header-values header))
		 ((not (message-check-element
			(intern (downcase (symbol-name header)))))
		  ;; We couldn't generate a value for this header,
		  ;; so we just ask the user.
		  (read-from-minibuffer
		   (format "Empty header for %s; enter value: " header)))))
	  ;; Finally insert the header.
	  (when (and value
		     (not (equal value "")))
	    (save-excursion
	      (if (bolp)
		  (progn
		    ;; This header didn't exist, so we insert it.
		    (goto-char (point-max))
		    (let ((formatter
			   (cdr (assq header message-header-format-alist))))
		      (if formatter
			  (funcall formatter header value)
			(insert header-string ": " value))
		      (push header-string message-inserted-headers)
		      (goto-char (message-fill-field))
		      ;; We check whether the value was ended by a
		      ;; newline.  If not, we insert one.
		      (unless (bolp)
			(insert "\n"))
		      (forward-line -1)))
		;; The value of this header was empty, so we clear
		;; totally and insert the new value.
                (delete-region (point) (line-end-position))
		;; If the header is optional, and the header was
		;; empty, we can't insert it anyway.
		(unless optionalp
		  (push header-string message-inserted-headers)
		  (insert value)
		  (message-fill-field)))
	      ;; Add the deletable property to the headers that require it.
	      (and (memq header message-deletable-headers)
		   (progn (beginning-of-line) (looking-at "[^:]+: "))
		   (add-text-properties
		    (point) (match-end 0)
		    '(message-deletable t face italic) (current-buffer)))))))
      ;; Insert new Sender if the From is strange.
      (let ((from (message-fetch-field "from"))
	    (sender (message-fetch-field "sender"))
	    (secure-sender (message-make-sender)))
	(when (and from
		   (not (message-check-element 'sender))
		   (not (string=
			 (downcase
			  (cadr (mail-extract-address-components from)))
			 (downcase secure-sender)))
		   (or (null sender)
		       (not
			(string=
			 (downcase
			  (cadr (mail-extract-address-components sender)))
			 (downcase secure-sender)))))
	  (goto-char (point-min))
	  ;; Rename any old Sender headers to Original-Sender.
	  (when (re-search-forward "^\\(Original-\\)*Sender:" nil t)
	    (beginning-of-line)
	    (insert "Original-")
	    (beginning-of-line))
	  (when (or (message-news-p)
		    (string-match "@.+\\.." secure-sender))
	    (insert "Sender: " secure-sender "\n"))))
      ;; Check for IDNA
      (message-idna-to-ascii-rhs))))

(defun message-insert-courtesy-copy (message)
  "Insert a courtesy message in mail copies of combined messages."
  (let (newsgroups)
    (save-excursion
      (save-restriction
	(message-narrow-to-headers)
	(when (setq newsgroups (message-fetch-field "newsgroups"))
	  (goto-char (point-max))
	  (insert "Posted-To: " newsgroups "\n")))
      (forward-line 1)
      (when message
	(cond
	 ((string-match "%s" message)
	  (insert (format message newsgroups)))
	 (t
	  (insert message)))))))

;;;
;;; Setting up a message buffer
;;;

(defun message-skip-to-next-address ()
  (let ((end (save-excursion
	       (message-next-header)
	       (point)))
	quoted char)
    (when (looking-at ",")
      (forward-char 1))
    (while (and (not (= (point) end))
		(or (not (eq char ?,))
		    quoted))
      (skip-chars-forward "^,\"" end)
      (when (eq (setq char (following-char)) ?\")
	(setq quoted (not quoted)))
      (unless (= (point) end)
	(forward-char 1)))
    (skip-chars-forward " \t\n")))

(defun message-split-line ()
  "Split current line, moving portion beyond point vertically down.
If the current line has `message-yank-prefix', insert it on the new line."
  (interactive "*" message-mode)
  (split-line message-yank-prefix))

(defun message-insert-header (header value)
  (insert (capitalize (symbol-name header))
	  ": "
	  (if (consp value) (car value) value)))

(defun message-field-name ()
  (save-excursion
    (goto-char (point-min))
    (when (looking-at "\\([^:]+\\):")
      (intern (capitalize (match-string 1))))))

(defun message-fill-field ()
  (save-excursion
    (save-restriction
      (message-narrow-to-field)
      (let ((field-name (message-field-name)))
	(funcall (or (cadr (assq field-name message-field-fillers))
		     'message-fill-field-general)))
      (point-max))))

(defun message-fill-field-address ()
  (let (end last)
    (while (not end)
      (message-skip-to-next-address)
      (cond ((bolp)
	     (end-of-line 0)
	     (setq end 1))
	    ((eobp)
	     (setq end 0)))
      (when (and (> (current-column) 78)
		 last)
	(save-excursion
	  (goto-char last)
	  (delete-char (- (skip-chars-backward " \t")))
	  (insert "\n\t")))
      (setq last (point)))
    (forward-line end)))

(defun message-fill-field-general ()
  (let ((begin (point))
	(fill-column 78)
	(fill-prefix "\t"))
    (while (and (search-forward "\n" nil t)
		(not (eobp)))
      (replace-match " " t t))
    (fill-region-as-paragraph begin (point-max))
    ;; Tapdance around looong Message-IDs.
    (forward-line -1)
    (when (looking-at "[ \t]*$")
      (delete-line))
    (goto-char begin)
    (search-forward ":" nil t)
    (when (looking-at "\n[ \t]+")
      (replace-match " " t t))
    (goto-char (point-max))))

(defun message-shorten-1 (list cut surplus)
  "Cut SURPLUS elements out of LIST, beginning with CUTth one."
  (setcdr (nthcdr (- cut 2) list)
	  (nthcdr (+ (- cut 2) surplus 1) list)))

(defun message-shorten-references (header references)
  "Trim REFERENCES to be 21 Message-ID long or less, and fold them.
When sending via news, also check that the REFERENCES are less
than 988 characters long, and if they are not, trim them until
they are."
  ;; 21 is the number suggested by USAGE.
  (let ((maxcount 21)
	(count 0)
	(cut 2)
	refs)
    (with-temp-buffer
      (insert references)
      (goto-char (point-min))
      ;; Cons a list of valid references.  GNKSA says we must not include MIDs
      ;; with whitespace or missing brackets (7.a "Does not propagate broken
      ;; Message-IDs in original References").
      (while (re-search-forward "<[^ <]+@[^ <]+>" nil t)
	(push (match-string 0) refs))
      (setq refs (nreverse refs)
	    count (length refs)))

    ;; If the list has more than MAXCOUNT elements, trim it by
    ;; removing the CUTth element and the required number of
    ;; elements that follow.
    (when (> count maxcount)
      (let ((surplus (- count maxcount)))
	(message-shorten-1 refs cut surplus)
	(cl-decf count surplus)))

    ;; When sending via news, make sure the total folded length will
    ;; be less than 998 characters.  This is to cater to broken INN
    ;; 2.3 which counts the total number of characters in a header
    ;; rather than the physical line length of each line, as it should.
    ;;
    ;; This hack should be removed when it's believed than INN 2.3 is
    ;; no longer widely used.
    ;;
    ;; At this point the headers have not been generated, thus we use
    ;; message-this-is-news directly.
    (when message-this-is-news
      (while (< 998
		(with-temp-buffer
		  (message-insert-header
		   header (mapconcat #'identity refs " "))
		  (buffer-size)))
	(message-shorten-1 refs cut 1)))
    ;; Finally, collect the references back into a string and insert
    ;; it into the buffer.
    (message-insert-header header (mapconcat #'identity refs " "))))

(defun message-position-point ()
  "Move point to where the user probably wants to find it."
  (message-narrow-to-headers)
  (cond
   ((re-search-forward "^[^:]+:[ \t]*$" nil t)
    (search-backward ":" )
    (widen)
    (forward-char 1)
    (if (eq (char-after) ? )
	(forward-char 1)
      (insert " ")))
   (t
    (goto-char (point-max))
    (widen)
    (forward-line 1)
    (unless (looking-at "$")
      (forward-line 2)))
   (sit-for 0)))

(defcustom message-beginning-of-line t
  "Whether \\<message-mode-map>\\[message-beginning-of-line]\
 goes to beginning of header values."
  :version "22.1"
  :group 'message-buffers
  :link '(custom-manual "(message)Movement")
  :type 'boolean)

(defvar visual-line-mode)
(declare-function beginning-of-visual-line "simple" (&optional n))

(defun message-beginning-of-header (handle-folded)
  "Move point to beginning of header's value.

When point is at the first header line, moves it after the colon
and spaces separating header name and header value.

When point is in a continuation line of a folded header (i.e. the
line starts with a space), the behavior depends on HANDLE-FOLDED
argument.  If it's nil, function moves the point to the start of
the header continuation; otherwise, function locates the
beginning of the header and moves point past the colon as is the
case of single-line headers.

No check whether point is inside of a header or body of the
message is performed.

Returns point or nil if beginning of header's value could not be
found.  In the latter case, the point is still moved to the
beginning of line (possibly after attempting to move it to the
beginning of a folded header)."
  ;; https://www.rfc-editor.org/rfc/rfc2822.txt, section 2.2.3. says that when
  ;; unfolding a single WSP should be consumed.  WSP is defined as a space
  ;; character or a horizontal tab.
  (beginning-of-line)
  (when handle-folded
    (while (and (> (point) (point-min))
                (or (eq (char-after) ?\s) (eq (char-after) ?\t)))
      (beginning-of-line 0)))
  (when (or (eq (char-after) ?\s) (eq (char-after) ?\t)
            (search-forward ":" (line-end-position) t))
    ;; We are a bit more lacks than the RFC and allow any positive number of WSP
    ;; characters.
    (skip-chars-forward " \t" (line-end-position))
    (point)))

(defun message-beginning-of-line (&optional n)
  "Move point to beginning of header value or to beginning of line.
The prefix argument N is passed directly to `beginning-of-line'.

This command is identical to `beginning-of-line' if point is
outside the message header or if the option
`message-beginning-of-line' is nil.

If point is in the message header and on a header line, move
point to the beginning of the header value or the beginning of
line, whichever is closer.  If point is already at beginning of
line, move point to beginning of header value.  Therefore,
repeated calls will toggle point between beginning of field and
beginning of line.

When called without a prefix argument, header value spanning
multiple lines is treated as a single line.  Otherwise, even if
N is 1, when point is on a continuation header line, it will be
moved to the beginning "
  (interactive "^p" message-mode)
  (cond
   ;; Go to beginning of header or beginning of line.
   ((and message-beginning-of-line (message-point-in-header-p))
    (let* ((point (point))
           (bol (progn (beginning-of-line n) (point)))
           (boh (message-beginning-of-header visual-line-mode)))
      (goto-char (if (and boh (or (< boh point) (= bol point))) boh bol))))
   ;; Go to beginning of visual line
   (visual-line-mode
    (beginning-of-visual-line n))
   ;; Go to beginning of line.
   ((beginning-of-line n))))

(defun message-buffer-name (type &optional to group)
  "Return a new (unique) buffer name based on TYPE and TO."
  (cond
   ;; Generate a new buffer name The Message Way.
   ((memq message-generate-new-buffers '(unique t))
    (generate-new-buffer-name
     (concat "*" type
	     (if to
		 (concat " to "
			 (or (car (mail-extract-address-components to))
			     to))
	       "")
	     (if (and group (not (string= group ""))) (concat " on " group) "")
	     "*")))
   ;; Check whether `message-generate-new-buffers' is a function,
   ;; and if so, call it.
   ((functionp message-generate-new-buffers)
    (funcall message-generate-new-buffers type to group))
   ((eq message-generate-new-buffers 'unsent)
    (generate-new-buffer-name
     (concat "*unsent " type
	     (if to
		 (concat " to "
			 (or (car (mail-extract-address-components to))
			     to))
	       "")
	     (if (and group (not (string= group ""))) (concat " on " group) "")
	     "*")))
   ;; Search for the existing message buffer with the specified name.
   (t
    (let* ((new (if (eq message-generate-new-buffers 'standard)
		    (generate-new-buffer-name (concat "*" type " message*"))
		  (let ((message-generate-new-buffers 'unique))
		    (message-buffer-name type to group))))
	   (regexp (concat "\\`"
			   (regexp-quote
			    (if (string-match "<[0-9]+>\\'" new)
				(substring new 0 (match-beginning 0))
			      new))
			   "\\(?:<\\([0-9]+\\)>\\)?\\'"))
	   (case-fold-search nil))
      (or (cdar
	   (last
	    (sort
	     (delq nil
		   (mapcar
		    (lambda (b)
		      (when (and (string-match regexp (setq b (buffer-name b)))
				 (eq (with-current-buffer b major-mode)
				     'message-mode))
			(cons (string-to-number (or (match-string 1 b) "1"))
			      b)))
		    (buffer-list)))
	     #'car-less-than-car)))
	  new)))))

(defun message-pop-to-buffer (name &optional switch-function)
  "Pop to buffer NAME, and warn if it already exists and is modified."
  (let ((buffer (get-buffer name)))
    (if (buffer-live-p buffer)
	(let ((window (get-buffer-window buffer 0)))
	  (if window
	      ;; Raise the frame already displaying the message buffer.
	      (progn
		(select-frame-set-input-focus (window-frame window))
		(select-window window))
	    (funcall (or switch-function #'pop-to-buffer) buffer)
	    (set-buffer buffer))
	  (when (and (buffer-modified-p)
		     (not (prog1
			      (y-or-n-p
			       "Message already being composed; erase? ")
			    (message nil))))
	    (error "Message being composed")))
      (funcall (or switch-function 'pop-to-buffer-same-window)
	       name)
      (set-buffer name))
    (erase-buffer)
    (message-mode)))

(defun message-do-send-housekeeping ()
  "Kill old message buffers."
  ;; We might have sent this buffer already.  Delete it from the
  ;; list of buffers.
  (setq message-buffer-list (delq (current-buffer) message-buffer-list))
  (while (and message-max-buffers
	      message-buffer-list
	      (>= (length message-buffer-list) message-max-buffers))
    ;; Kill the oldest buffer -- unless it has been changed.
    (let ((buffer (pop message-buffer-list)))
      (when (and (buffer-live-p buffer)
		 (not (buffer-modified-p buffer)))
	(kill-buffer buffer))))
  ;; Rename the buffer.
  (funcall (or message-send-rename-function
               #'message-default-send-rename-function))
  ;; Push the current buffer onto the list.
  (when message-max-buffers
    (setq message-buffer-list
	  (nconc message-buffer-list (list (current-buffer))))))

(defun message-default-send-rename-function ()
  ;; Note: mail-abbrevs of XEmacs renames buffer name behind Gnus.
  (when (string-match
	 "\\`\\*\\(sent \\|unsent \\)?\\(.+\\)\\*[^\\*]*\\|\\`mail to "
	 (buffer-name))
    (let ((name (match-string 2 (buffer-name)))
	  to group)
      (if (not (or (null name)
		   (string-equal name "mail")
		   (string-equal name "posting")))
	  (setq name (concat "*sent " name "*"))
	(message-narrow-to-headers)
	(setq to (message-fetch-field "to"))
	(setq group (message-fetch-field "newsgroups"))
	(widen)
	(setq name
	      (cond
	       (to (concat "*sent mail to "
			   (or (car (mail-extract-address-components to))
			       to) "*"))
	       ((and group (not (string= group "")))
		(concat "*sent posting on " group "*"))
	       (t "*sent mail*"))))
      (unless (string-equal name (buffer-name))
	(rename-buffer name t)))))

(defun message-mail-user-agent ()
  (let ((mua (cond
	      ((not message-mail-user-agent) nil)
	      ((eq message-mail-user-agent t) mail-user-agent)
	      (t message-mail-user-agent))))
    (if (memq mua '(message-user-agent gnus-user-agent))
	nil
      mua)))

;; YANK-ACTION, if non-nil, can be a buffer or a yank action of the
;; form (FUNCTION . ARGS).
(defun message-setup (headers &optional yank-action actions
			      continue switch-function return-action)
  (let ((mua (message-mail-user-agent))
	subject to field)
    (if (not (and message-this-is-mail mua))
	(message-setup-1 headers yank-action actions return-action)
      (setq headers (copy-sequence headers))
      (setq field (assq 'Subject headers))
      (when field
	(setq subject (cdr field))
	(setq headers (delq field headers)))
      (setq field (assq 'To headers))
      (when field
	(setq to (cdr field))
	(setq headers (delq field headers)))
      (let ((mail-user-agent mua))
	(compose-mail to subject
		      (mapcar (lambda (item)
				(cons
				 (format "%s" (car item))
				 (cdr item)))
			      headers)
		      continue switch-function
		      (if (bufferp yank-action)
			  (list 'insert-buffer yank-action)
			yank-action)
		      actions)))))

(defun message-headers-to-generate (headers included-headers excluded-headers)
  "Return a list that includes all headers from HEADERS.
If INCLUDED-HEADERS is a list, just include those headers.  If it is
t, include all headers.  In any case, headers from EXCLUDED-HEADERS
are not included."
  (let ((result nil)
	header-name)
    (dolist (header headers)
      (setq header-name (cond
			 ((and (consp header)
			       (eq (car header) 'optional))
			  ;; On the form (optional . Header)
			  (cdr header))
			 ((consp header)
			  ;; On the form (Header . function)
			  (car header))
			 (t
			  ;; Just a Header.
			  header)))
      (when (and (not (memq header-name excluded-headers))
		 (or (eq included-headers t)
		     (memq header-name included-headers)))
	(push header result)))
    (nreverse result)))

(defun message-setup-1 (headers &optional yank-action actions return-action)
  (dolist (action actions)
    (condition-case nil
        ;; FIXME: Use functions rather than expressions!
	(add-to-list 'message-send-actions
		     `(apply #',(car action) ',(cdr action)))))
  (setq message-return-action return-action)
  (setq message-reply-buffer
	(if (and (consp yank-action)
		 (eq (car yank-action) 'insert-buffer))
	    (nth 1 yank-action)
	  yank-action))
  (goto-char (point-min))
  ;; Insert all the headers.
  (mail-header-format
   (let ((h headers)
	 (alist message-header-format-alist))
     (while h
       (unless (assq (caar h) message-header-format-alist)
	 (push (list (caar h)) alist))
       (pop h))
     alist)
   headers)
  (delete-region (point) (progn (forward-line -1) (point)))
  (when message-default-headers
    (insert
     (if (functionp message-default-headers)
         (funcall message-default-headers)
       message-default-headers))
    (or (bolp) (insert ?\n)))
  (insert (concat mail-header-separator "\n"))
  (forward-line -1)
  ;; If a crash happens while replying, the auto-save file would *not*
  ;; have a `References:' header if `message-generate-headers-first'
  ;; was nil.  Therefore, always generate it first.  (And why not
  ;; include the `In-Reply-To' header as well.)
  (let ((message-generate-headers-first
         (if (eq message-generate-headers-first t)
             t
           (append message-generate-headers-first '(References In-Reply-To)))))
    (when (message-news-p)
      (when message-default-news-headers
        (insert message-default-news-headers)
        (or (bolp) (insert ?\n)))
      (message-generate-headers
       (message-headers-to-generate
        (append message-required-news-headers
                message-required-headers)
        message-generate-headers-first
        '(Lines Subject))))
    (when (message-mail-p)
      (when message-default-mail-headers
        (insert message-default-mail-headers)
        (or (bolp) (insert ?\n)))
      (message-generate-headers
       (message-headers-to-generate
        (append message-required-mail-headers
                message-required-headers)
        message-generate-headers-first
        '(Lines Subject)))))
  (run-hooks 'message-signature-setup-hook)
  (message-insert-signature)
  (save-restriction
    (message-narrow-to-headers)
    (run-hooks 'message-header-setup-hook))
  (setq buffer-undo-list nil)
  (when message-generate-hashcash
    ;; Generate hashcash headers for recipients already known
    (mail-add-payment-async))
  ;; Gnus posting styles are applied via buffer-local `message-setup-hook'
  ;; values.
  (run-hooks 'message-setup-hook)
  ;; Do this last to give it precedence over posting styles, etc.
  (when (message-mail-p)
    (save-restriction
      (message-narrow-to-headers)
      (if message-alternative-emails
	  (message-use-alternative-email-as-from))))
  (message-position-point)
  ;; Allow correct handling of `message-checksum' in `message-yank-original':
  (set-buffer-modified-p nil)
  (undo-boundary)
  ;; rmail-start-mail expects message-mail to return t (Bug#9392)
  t)

(defun message-set-auto-save-file-name ()
  "Associate the message buffer with a file in the drafts directory."
  (when message-auto-save-directory
    (unless (file-directory-p
	     (directory-file-name message-auto-save-directory))
      (make-directory message-auto-save-directory t))
    (if (gnus-alive-p)
	(setq message-draft-article
	      (nndraft-request-associate-buffer "drafts"))

      ;; If Gnus were alive, draft messages would be saved in the drafts folder.
      ;; But Gnus is not alive, so arrange to save the draft message in a
      ;; regular file in message-auto-save-directory.  Append a unique
      ;; time-based suffix to the filename to allow multiple drafts to be saved
      ;; simultaneously without overwriting each other (which mimics the
      ;; functionality of the Gnus drafts folder).
      (setq buffer-file-name (expand-file-name
			      (concat
			      (if (memq system-type
					'(ms-dos windows-nt cygwin))
				  "message"
				"*message*")
			       (format-time-string "-%Y%m%d-%H%M%S"))
			      message-auto-save-directory))
      (setq buffer-auto-save-file-name (make-auto-save-file-name)))
    (clear-visited-file-modtime)
    (setq buffer-file-coding-system message-draft-coding-system)))

(defun message-disassociate-draft ()
  "Disassociate the message buffer from the drafts directory."
  (when message-draft-article
    (nndraft-request-expire-articles
     (list message-draft-article) "drafts" nil t)))

(defun message-insert-headers ()
  "Generate the headers for the article."
  (interactive nil message-mode)
  (save-excursion
    (save-restriction
      (message-narrow-to-headers)
      (when (message-news-p)
	(message-generate-headers
	 (delq 'Lines
	       (delq 'Subject
		     (copy-sequence message-required-news-headers)))))
      (when (message-mail-p)
	(message-generate-headers
	 (delq 'Lines
	       (delq 'Subject
		     (copy-sequence message-required-mail-headers))))))))

\f

;;;
;;; Commands for interfacing with message
;;;

;;;###autoload
(defun message-mail (&optional to subject other-headers continue
			       switch-function yank-action send-actions
			       return-action &rest _)
  "Start editing a mail message to be sent.
OTHER-HEADERS is an alist of header/value pairs.  CONTINUE says whether
to continue editing a message already being composed.  SWITCH-FUNCTION
is a function used to switch to and display the mail buffer."
  (interactive)
  (let ((message-this-is-mail t)
	message-buffers)
    ;; Search for the existing message buffer if `continue' is non-nil.
    (if (and continue
	     (setq message-buffers (message-buffers)))
	(pop-to-buffer (car message-buffers))
      ;; Start a new buffer.
      (unless (message-mail-user-agent)
	(message-pop-to-buffer (message-buffer-name "mail" to) switch-function))
      (message-setup
       (nconc
	`((To . ,(or to "")) (Subject . ,(or subject "")))
	;; C-h f compose-mail says that headers should be specified as
	;; (string . value); however all the rest of message expects
	;; headers to be symbols, not strings (eg message-header-format-alist).
	;; https://lists.gnu.org/r/emacs-devel/2011-01/msg00337.html
	;; We need to convert any string input, eg from rmail-start-mail.
	(dolist (h other-headers other-headers)
	  (when (stringp (car h))
            (setcar h (intern (capitalize (car h)))))
          ;; Firefox sends us In-Reply-To headers that are Message-IDs
          ;; without <> around them.  Fix that.
          (when (and (eq (car h) 'In-Reply-To)
                     (stringp (cdr h))
                     ;; Looks like a Message-ID.
                     (string-match-p "\\`[^ @]+@[^ @]+\\'" (cdr h))
                     (not (string-match-p "\\`<.*>\\'" (cdr h))))
            (setcdr h (concat "<" (cdr h) ">")))))
       yank-action send-actions continue switch-function
       return-action))))

;;;###autoload
(defun message-news (&optional newsgroups subject)
  "Start editing a news article to be sent."
  (interactive)
  (let ((message-this-is-news t))
    (message-pop-to-buffer (message-buffer-name "posting" nil newsgroups))
    (message-setup `((Newsgroups . ,(or newsgroups ""))
		     (Subject . ,(or subject ""))))))

(defun message-alter-recipients-discard-bogus-full-name (addrcell)
  "Discard mail address in full names.
When the full name in reply headers contains the mail
address (e.g. \"foo@bar <foo@bar>\"), discard full name.
ADDRCELL is a cons cell where the car is the mail address and the
cdr is the complete address (full name and mail address)."
  (if (string-match (concat (regexp-quote (car addrcell)) ".*"
			    (regexp-quote (car addrcell)))
		    (cdr addrcell))
      (cons (car addrcell) (car addrcell))
    addrcell))

(defcustom message-alter-recipients-function nil
  "Function called to allow alteration of reply header structures.
It is called in `message-get-reply-headers' for each recipient.
The function is called with one parameter, a cons cell ..."
  :type '(choice (const :tag "None" nil)
		 (const :tag "Discard bogus full name"
			message-alter-recipients-discard-bogus-full-name)
		 function)
  :version "23.1" ;; No Gnus
  :group 'message-headers)

(defun message-get-reply-headers (wide &optional to-address address-headers)
  (let (follow-to mct never-mct to cc author mft recipients extra)
    ;; Find all relevant headers we need.
    (save-restriction
      (message-narrow-to-headers-or-head)
      ;; Gmane renames "To".  Look at "Original-To", too, if it is present in
      ;; message-header-synonyms.
      (setq to (or (message-fetch-field "to")
		   (and (cl-loop for synonym in message-header-synonyms
			         when (memq 'Original-To synonym)
			         return t)
			(message-fetch-field "original-to")))
	    cc (message-fetch-field "cc")
	    extra (when message-extra-wide-headers
		    (mapconcat #'identity
			       (mapcar #'message-fetch-field
				       message-extra-wide-headers)
			       ", "))
	    mct (message-fetch-field "mail-copies-to")
	    author (or (message-fetch-field "mail-reply-to")
		       (message-fetch-field "reply-to"))
	    mft (and message-use-mail-followup-to
		     (message-fetch-field "mail-followup-to")))
      ;; Make sure this message goes to the author if this is a wide
      ;; reply, since Reply-To address may be a list address a mailing
      ;; list server added.
      (when (and wide author)
	(setq cc (concat author ", " cc)))
      (when (or wide (not author))
	(setq author (or (message-fetch-field "from") ""))))

    ;; Handle special values of Mail-Copies-To.
    (when mct
      (cond ((or (equal (downcase mct) "never")
		 (equal (downcase mct) "nobody"))
	     (setq never-mct t)
	     (setq mct nil))
	    ((or (equal (downcase mct) "always")
		 (equal (downcase mct) "poster"))
	     (setq mct author))))

    (save-match-data
      ;; Build (textual) list of new recipient addresses.
      (cond
       (to-address
	(setq recipients (concat ", " to-address))
	;; If the author explicitly asked for a copy, we don't deny it to them.
	(if mct (setq recipients (concat recipients ", " mct))))
       ((not wide)
	(setq recipients (concat ", " author)))
       (address-headers
	(dolist (header address-headers)
	  (let ((value (message-fetch-field header)))
	    (when value
	      (setq recipients (concat recipients ", " value))))))
       ((and mft
	     (string-match "[^ \t,]" mft)
	     (or (not (eq message-use-mail-followup-to 'ask))
		 (message-y-or-n-p "Obey Mail-Followup-To? " t "\
You should normally obey the Mail-Followup-To: header.  In this
article, it has the value of

" mft "

which directs your response to " (if (string-search "," mft)
				     "the specified addresses"
				   "that address only") ".

Most commonly, Mail-Followup-To is used by a mailing list poster to
express that responses should be sent to just the list, and not the
poster as well.

If a message is posted to several mailing lists, Mail-Followup-To may
also be used to direct the following discussion to one list only,
because discussions that are spread over several lists tend to be
fragmented and very difficult to follow.

Also, some source/announcement lists are not intended for discussion;
responses here are directed to other addresses.

You may customize the variable `message-use-mail-followup-to', if you
want to get rid of this query permanently.")))
	(setq recipients (concat ", " mft)))
       (t
	(setq recipients (if never-mct "" (concat ", " author)))
	(if to (setq recipients (concat recipients ", " to)))
	(if cc (setq recipients (concat recipients ", " cc)))
	(if extra (setq recipients (concat recipients ", " extra)))
	(if mct (setq recipients (concat recipients ", " mct)))))
      (if (>= (length recipients) 2)
	  ;; Strip the leading ", ".
	  (setq recipients (substring recipients 2)))
      ;; Squeeze whitespace.
      (while (string-match "[ \t][ \t]+" recipients)
	(setq recipients (replace-match " " t t recipients)))
      ;; Remove addresses that match `message-dont-reply-to-names'.
      (setq recipients
            (cond ((functionp message-dont-reply-to-names)
                   (mapconcat
                    #'identity
                    (delq nil
                          (mapcar (lambda (mail)
                                    (unless (funcall message-dont-reply-to-names
                                                     (mail-strip-quoted-names mail))
                                      mail))
                                  (message-tokenize-header recipients)))
                    ", "))
                  (t (let ((mail-dont-reply-to-names (message-dont-reply-to-names)))
                       (mail-dont-reply-to recipients)))))
      ;; Perhaps "Mail-Copies-To: never" removed the only address?
      (if (string-equal recipients "")
	  (setq recipients author))
      ;; Convert string to a list of (("foo@bar" . "Name <Foo@BAR>") ...).
      (setq recipients
	    (mapcar
	     (lambda (addr)
	       (if message-alter-recipients-function
		   (funcall message-alter-recipients-function
			    (cons (downcase (mail-strip-quoted-names addr))
				  addr))
		 (cons (downcase (mail-strip-quoted-names addr)) addr)))
	     (message-tokenize-header recipients)))
      ;; Remove all duplicates.
      (let ((s recipients))
	(while s
	  (let ((address (car (pop s))))
	    (while (assoc address s)
	      (setq recipients (delq (assoc address s) recipients)
		    s (delq (assoc address s) s))))))

      ;; Remove hierarchical lists that are contained within each other,
      ;; if message-hierarchical-addresses is defined.
      (when message-hierarchical-addresses
	(let ((plain-addrs (mapcar #'car recipients))
	      subaddrs recip)
	  (while plain-addrs
	    (setq subaddrs (assoc (car plain-addrs)
				  message-hierarchical-addresses)
		  plain-addrs (cdr plain-addrs))
	    (when subaddrs
	      (setq subaddrs (cdr subaddrs))
	      (while subaddrs
		(setq recip (assoc (car subaddrs) recipients)
		      subaddrs (cdr subaddrs))
		(if recip
		    (setq recipients (delq recip recipients))))))))

      (setq recipients (message-prune-recipients recipients))
      (setq recipients
	    (cl-loop for (id . address) in recipients
		     collect (cons id (message--alter-repeat-address address))))

      ;; Build the header alist.  Allow the user to be asked whether
      ;; or not to reply to all recipients in a wide reply.
      (when (or (< (length recipients) 2)
		(not message-wide-reply-confirm-recipients)
		(y-or-n-p "Reply to all recipients? "))
	(if never-mct
	    ;; The author has requested never to get a (wide)
	    ;; response, so put everybody else into the To header.
	    ;; This avoids looking as if we're To-in somebody else in
	    ;; specific, and just Cc-in the rest.
	    (setq follow-to (list
			     (cons 'To
				   (mapconcat #'cdr recipients ", "))))
	  ;; Put the first recipient in the To header.
	  (setq follow-to (list (cons 'To (cdr (pop recipients)))))
	  ;; Put the rest of the recipients in Cc.
	  (when recipients
	    (setq recipients (mapconcat #'cdr recipients ", "))
	    (if (string-match "^ +" recipients)
		(setq recipients (substring recipients (match-end 0))))
	    (push (cons 'Cc recipients) follow-to)))))
    follow-to))

(defun message-prune-recipients (recipients)
  (dolist (rule message-prune-recipient-rules)
    (let ((match (car rule))
	  dup-match
	  address)
      (dolist (recipient recipients)
	(setq address (car recipient))
	(when (string-match match address)
	  (setq dup-match (replace-match (cadr rule) nil nil address))
	  (dolist (recipient recipients)
	    ;; Don't delete the address that triggered this.
	    (when (and (not (eq address (car recipient)))
		       (string-match dup-match (car recipient)))
	      (setq recipients (delq recipient recipients))))))))
  recipients)

(defun message--alter-repeat-address (address)
  "Transform an address on the form \"\"foo@bar.com\"\" <foo@bar.com>\".
The first bit will be elided if a match is made."
  (let ((bits (gnus-extract-address-components address)))
    (if (equal (car bits) (cadr bits))
	(car bits)
      ;; Return the original address if we don't have repetition.
      address)))

(defcustom message-simplify-subject-functions
  '(message-strip-list-identifiers
    message-strip-subject-re
    message-strip-subject-trailing-was
    message-strip-subject-encoded-words)
  "List of functions taking a string argument that simplify subjects.
The functions are applied when replying to a message.

Useful functions to put in this list include:
`message-strip-list-identifiers', `message-strip-subject-re',
`message-strip-subject-trailing-was', and
`message-strip-subject-encoded-words'."
  :version "22.1" ;; Gnus 5.10.9
  :group 'message-various
  :type '(repeat function))

(defun message-simplify-subject (subject &optional functions)
  "Return simplified SUBJECT.
Do so by calling each one-argument function in the list of functions
specified by FUNCTIONS, if non-nil, or by the variable
`message-simplify-subject-functions' otherwise."
  (dolist (fun (or functions message-simplify-subject-functions) subject)
    (setq subject (funcall fun subject))))

;;;###autoload
(defun message-reply (&optional to-address wide switch-function)
  "Start editing a reply to the article in the current buffer."
  (interactive)
  (require 'gnus-sum)			; for gnus-list-identifiers
  (let ((cur (current-buffer))
	from subject date
	references message-id follow-to
	(message-this-is-mail t)
	gnus-warning)
    (save-restriction
      (message-narrow-to-head-1)
      ;; Allow customizations to have their say.
      (if (not wide)
	  ;; This is a regular reply.
	  (when (functionp message-reply-to-function)
	    (save-excursion
	      (setq follow-to (funcall message-reply-to-function))))
	;; This is a followup.
	(when (functionp message-wide-reply-to-function)
	  (save-excursion
	    (setq follow-to
		  (funcall message-wide-reply-to-function)))))
      (setq message-id (message-fetch-field "message-id" t)
	    references (message-fetch-field "references")
	    date (message-fetch-field "date")
	    from (or (message-fetch-field "from") "nobody")
	    subject (or (message-fetch-field "subject") "none"))

      ;; Strip list identifiers, "Re: ", and "was:"
      (setq subject (concat "Re: " (message-simplify-subject subject)))

      (when (and (setq gnus-warning (message-fetch-field "gnus-warning"))
		 (string-match "<[^>]+>" gnus-warning))
	(setq message-id (match-string 0 gnus-warning)))

      (unless follow-to
	(setq follow-to (message-get-reply-headers wide to-address))))

    (let ((headers
	   `((Subject . ,subject)
	     ,@follow-to)))
      (unless (message-mail-user-agent)
	(message-pop-to-buffer
	 (message-buffer-name
	  (if wide "wide reply" "reply") from
	  (if wide to-address nil))
	 switch-function))
      (setq message-reply-headers
	    (make-full-mail-header 0 (cdr (assq 'Subject headers))
		                   from date message-id references 0 0 ""))
      (message-setup headers cur))))

;;;###autoload
(defun message-wide-reply (&optional to-address)
  "Make a \"wide\" reply to the message in the current buffer."
  (interactive)
  (message-reply to-address t))

;;;###autoload
(defun message-followup (&optional to-newsgroups)
  "Follow up to the message in the current buffer.
If TO-NEWSGROUPS, use that as the new Newsgroups line."
  (interactive)
  (require 'gnus-sum)			; for gnus-list-identifiers
  (let ((cur (current-buffer))
	from subject date reply-to mrt mct
	references message-id follow-to
	(message-this-is-news t)
	followup-to distribution newsgroups gnus-warning posted-to)
    (save-restriction
      (narrow-to-region
       (goto-char (point-min))
       (if (search-forward "\n\n" nil t)
	   (1- (point))
	 (point-max)))
      (when (functionp message-followup-to-function)
	(setq follow-to
	      (funcall message-followup-to-function)))
      (setq from (message-fetch-field "from")
	    date (message-fetch-field "date")
	    subject (or (message-fetch-field "subject") "none")
	    references (message-fetch-field "references")
	    message-id (message-fetch-field "message-id" t)
	    followup-to (message-fetch-field "followup-to")
	    newsgroups (message-fetch-field "newsgroups")
	    posted-to (message-fetch-field "posted-to")
	    reply-to (message-fetch-field "reply-to")
	    mrt (message-fetch-field "mail-reply-to")
	    distribution (message-fetch-field "distribution")
	    mct (message-fetch-field "mail-copies-to"))
      (when (and (setq gnus-warning (message-fetch-field "gnus-warning"))
		 (string-match "<[^>]+>" gnus-warning))
	(setq message-id (match-string 0 gnus-warning)))
      ;; Remove bogus distribution.
      (when (and (stringp distribution)
		 (let ((case-fold-search t))
		   (string-match "world" distribution)))
	(setq distribution nil))
      ;; Strip list identifiers, "Re: ", and "was:"
      (setq subject (concat "Re: " (message-simplify-subject subject)))
      (widen))

    (message-pop-to-buffer (message-buffer-name "followup" from newsgroups))

    (setq message-reply-headers
	  (make-full-mail-header
           0 subject from date message-id references 0 0 ""))

    (message-setup
     `((Subject . ,subject)
       ,@(cond
	  (to-newsgroups
	   (list (cons 'Newsgroups to-newsgroups)))
	  (follow-to follow-to)
	  ((and followup-to message-use-followup-to)
	   (list
	    (cond
	     ((equal (downcase followup-to) "poster")
	      (if (or (eq message-use-followup-to 'use)
		      (message-y-or-n-p "Obey Followup-To: poster? " t "\
You should normally obey the Followup-To: header.

`Followup-To: poster' sends your response via e-mail instead of news.

A typical situation where `Followup-To: poster' is used is when the poster
does not read the newsgroup, so he wouldn't see any replies sent to it.

You may customize the variable `message-use-followup-to', if you
want to get rid of this query permanently."))
		  (progn
		    (setq message-this-is-news nil)
		    (cons 'To (or mrt reply-to from "")))
		(cons 'Newsgroups newsgroups)))
	     (t
	      (if (or (equal followup-to newsgroups)
		      (not (eq message-use-followup-to 'ask))
		      (message-y-or-n-p
		       (concat "Obey Followup-To: " followup-to "? ") t "\
You should normally obey the Followup-To: header.

	`Followup-To: " followup-to "'
directs your response to " (if (string-search "," followup-to)
			       "the specified newsgroups"
			     "that newsgroup only") ".

If a message is posted to several newsgroups, Followup-To is often
used to direct the following discussion to one newsgroup only,
because discussions that are spread over several newsgroup tend to
be fragmented and very difficult to follow.

Also, some source/announcement newsgroups are not intended for discussion;
responses here are directed to other newsgroups.

You may customize the variable `message-use-followup-to', if you
want to get rid of this query permanently."))
		  (cons 'Newsgroups followup-to)
		(cons 'Newsgroups newsgroups))))))
	  (posted-to
	   `((Newsgroups . ,posted-to)))
	  (t
	   `((Newsgroups . ,newsgroups))))
       ,@(and distribution (list (cons 'Distribution distribution)))
       ,@(when (and mct
		    (not (or (equal (downcase mct) "never")
			     (equal (downcase mct) "nobody"))))
	   (list (cons 'Cc (if (or (equal (downcase mct) "always")
				   (equal (downcase mct) "poster"))
			       (or mrt reply-to from "")
			     mct)))))

     cur)))

(defun message-is-yours-p ()
  "Non-nil means current article is yours.
If you have added `cancel-messages' to `message-shoot-gnksa-feet', all articles
are yours except those that have Cancel-Lock header not belonging to you.
Instead of shooting GNKSA feet, you should modify `message-alternative-emails'
to match all of yours addresses."
  ;; Canlock-logic as suggested by Per Abrahamsen
  ;; <abraham@dina.kvl.dk>
  ;;
  ;; IF article has cancel-lock THEN
  ;;   IF we can verify it THEN
  ;;     issue cancel
  ;;   ELSE
  ;;     error: cancellock: article is not yours
  ;; ELSE
  ;;   Use old rules, comparing sender...
  (save-excursion
    (save-restriction
      (message-narrow-to-head-1)
      (if (and (message-fetch-field "Cancel-Lock")
	       (message-gnksa-enable-p 'canlock-verify))
	  (if (null (canlock-verify))
	      t
	    (error "Failed to verify Cancel-lock: This article is not yours"))
	(let (sender from)
	  (or
	   (message-gnksa-enable-p 'cancel-messages)
	   (and (setq sender (message-fetch-field "sender"))
		(string-equal (downcase sender)
			      (downcase (message-make-sender))))
	   ;; Email address in From field equals to our address
	   (and (setq from (message-fetch-field "from"))
		(string-equal
		 (downcase (car (mail-header-parse-address from)))
		 (downcase (car (mail-header-parse-address
				 (message-make-from))))))
	   ;; Email address in From field matches
	   ;; 'message-alternative-emails' regexp or function.
	   (and from
		message-alternative-emails
                (cond ((functionp message-alternative-emails)
                       (funcall message-alternative-emails
                                (mail-header-parse-address from)))
                      (t (string-match message-alternative-emails
                                       (car (mail-header-parse-address from))))))))))))

;;;###autoload
(defun message-cancel-news (&optional arg)
  "Cancel an article you posted.
If ARG, allow editing of the cancellation message."
  (interactive "P")
  (unless (message-news-p)
    (error "This is not a news article; canceling is impossible"))
  (let (from newsgroups message-id distribution buf)
    (save-excursion
      ;; Get header info from original article.
      (save-restriction
	(message-narrow-to-head-1)
	(setq from (message-fetch-field "from")
	      newsgroups (message-fetch-field "newsgroups")
	      message-id (message-fetch-field "message-id" t)
	      distribution (message-fetch-field "distribution")))
      ;; Make sure that this article was written by the user.
      (unless (message-is-yours-p)
	(error "This article is not yours"))
      (when (yes-or-no-p "Do you really want to cancel this article? ")
	;; Make control message.
	(if arg
	    (message-news)
	  (setq buf (set-buffer (gnus-get-buffer-create " *message cancel*"))))
	(erase-buffer)
	(insert "Newsgroups: " newsgroups "\n"
		"From: " from "\n"
		"Subject: cancel " message-id "\n"
		"Control: cancel " message-id "\n"
		(if distribution
		    (concat "Distribution: " distribution "\n")
		  "")
		mail-header-separator "\n"
		message-cancel-message)
	(run-hooks 'message-cancel-hook)
	(unless arg
	  (message "Canceling your article...")
	  (if (let ((message-syntax-checks
		     'dont-check-for-anything-just-trust-me))
		(funcall message-send-news-function))
	      (message "Canceling your article...done"))
	  (kill-buffer buf))))))

;;;###autoload
(defun message-supersede ()
  "Start composing a message to supersede the current message.
This is done simply by taking the old article and adding a Supersedes
header line with the old Message-ID."
  (interactive)
  (let ((cur (current-buffer)))
    ;; Check whether the user owns the article that is to be superseded.
    (unless (message-is-yours-p)
      (error "This article is not yours"))
    ;; Get a normal message buffer.
    (message-pop-to-buffer (message-buffer-name "supersede"))
    (insert-buffer-substring cur)
    (mime-to-mml)
    (message-narrow-to-head-1)
    ;; Remove unwanted headers.
    (when message-ignored-supersedes-headers
      (message-remove-header message-ignored-supersedes-headers t))
    (goto-char (point-min))
    (if (not (re-search-forward "^Message-ID: " nil t))
	(error "No Message-ID in this article")
      (replace-match "Supersedes: " t t))
    (goto-char (point-max))
    (insert mail-header-separator)
    (widen)
    (forward-line 1)))

;;;###autoload
(defun message-recover ()
  "Reread contents of current buffer from its last auto-save file."
  (interactive)
  (let ((file-name (make-auto-save-file-name)))
    (cond ((save-window-excursion
	     (with-output-to-temp-buffer "*Directory*"
	       (with-current-buffer standard-output
		 (fundamental-mode))
	       (buffer-disable-undo standard-output)
	       (let ((default-directory "/"))
		 (call-process
		  "ls" nil standard-output nil "-l" file-name)))
	     (yes-or-no-p (format "Recover auto save file %s? " file-name)))
	   (let ((buffer-read-only nil))
	     (erase-buffer)
	     (insert-file-contents file-name nil)))
	  (t (error "message-recover canceled")))))

;;; Washing Subject:

(defun message-wash-subject (subject)
  "Remove junk like \"Re:\", \"(fwd)\", etc. added to subject string SUBJECT.
Previous forwarders, repliers, etc. may add it."
  (with-temp-buffer
    (insert subject)
    (goto-char (point-min))
    ;; strip Re/Fwd stuff off the beginning
    (while (re-search-forward
	    "\\([Rr][Ee]:\\|[Ff][Ww][Dd]\\(\\[[0-9]*\\]\\)?:\\|[Ff][Ww]:\\)" nil t)
      (replace-match ""))

    ;; and gnus-style forwards [foo@bar.com] subject
    (goto-char (point-min))
    (while (re-search-forward "\\[[^ \t]*\\(@\\|\\.\\)[^ \t]*\\]" nil t)
      (replace-match ""))

    ;; and off the end
    (goto-char (point-max))
    (while (re-search-backward "([Ff][Ww][Dd])" nil t)
      (replace-match ""))

    ;; and finally, any whitespace that was left-over
    (goto-char (point-min))
    (while (re-search-forward "^[ \t]+" nil t)
      (replace-match ""))
    (goto-char (point-max))
    (while (re-search-backward "[ \t]+$" nil t)
      (replace-match ""))

    (buffer-string)))

;;; Forwarding messages.

(defvar message-forward-decoded-p nil
  "Non-nil means the original message is decoded.")

(defun message-forward-subject-name-subject (subject)
  "Generate a SUBJECT for a forwarded message.
The form is: [Source] Subject, where if the original message was mail,
Source is the name of the sender, and if the original message was
news, Source is the list of newsgroups is was posted to."
  (let* ((group (message-fetch-field "newsgroups"))
	 (from (message-fetch-field "from"))
	 (prefix
	  (or group
	      (or (and from (or
			     (car (gnus-extract-address-components from))
			     (cadr (gnus-extract-address-components from))))
		  "(nowhere)"))))
    (concat "["
	    (if message-forward-decoded-p
		prefix
	      (mail-decode-encoded-word-string prefix))
	    "] " subject)))

(defun message-forward-subject-author-subject (subject)
  "Generate a SUBJECT for a forwarded message.
The form is: [Source] Subject, where if the original message was mail,
Source is the sender, and if the original message was news, Source is
the list of newsgroups is was posted to."
  (let* ((group (message-fetch-field "newsgroups"))
	 (prefix
	  (or group
	      (or (message-fetch-field "from")
		  "(nowhere)"))))
    (concat "["
	    (if message-forward-decoded-p
		prefix
	      (mail-decode-encoded-word-string prefix))
	    "] " subject)))

(defun message-forward-subject-fwd (subject)
  "Generate a SUBJECT for a forwarded message.
The form is: Fwd: Subject, where Subject is the original subject of
the message."
  (if (string-match "^Fwd: " subject)
      subject
    (concat "Fwd: " subject)))

(defun message-make-forward-subject ()
  "Return a Subject header suitable for the message in the current buffer."
  (save-excursion
    (save-restriction
      (message-narrow-to-head-1)
      (let ((funcs message-make-forward-subject-function)
	    (subject (message-fetch-field "Subject")))
	(setq subject
	      (if subject
		  (if message-forward-decoded-p
		      subject
		    (mail-decode-encoded-word-string subject))
		""))
	(when message-wash-forwarded-subjects
	  (setq subject (message-wash-subject subject)))
	;; Make sure funcs is a list.
	(and funcs
	     (not (listp funcs))
	     (setq funcs (list funcs)))
	;; Apply funcs in order, passing subject generated by previous
	;; func to the next one.
	(dolist (func funcs)
	  (when (functionp func)
	    (setq subject (funcall func subject))))
	subject))))

(defvar gnus-article-decoded-p)


;;;###autoload
(defun message-forward (&optional news digest)
  "Forward the current message via mail.
Optional NEWS will use news to forward instead of mail.
Optional DIGEST will use digest to forward."
  (interactive "P")
  (let* ((cur (current-buffer))
	 (message-forward-decoded-p
	  (if (local-variable-p 'gnus-article-decoded-p (current-buffer))
	      gnus-article-decoded-p ;; In an article buffer.
	    message-forward-decoded-p))
	 (subject (message-make-forward-subject)))
    (if news
	(message-news nil subject)
      (message-mail nil subject))
    (message-forward-make-body cur digest)))

(defun message-forward-make-body-plain (forward-buffer)
  (insert
   "\n-------------------- Start of forwarded message --------------------\n")
  (let ((b (point))
	(contents (with-current-buffer forward-buffer (buffer-string)))
	e)
    (unless (multibyte-string-p contents)
      (error "Attempt to insert unibyte string from the buffer \"%s\"\
 to the multibyte buffer \"%s\""
             forward-buffer
	     (buffer-name)))
    (insert (mm-with-multibyte-buffer
	      (insert contents)
	      (mime-to-mml)
	      (goto-char (point-min))
	      (when (looking-at "From ")
		(replace-match "X-From-Line: "))
	      (buffer-string)))
    (unless (bolp) (insert "\n"))
    (setq e (point))
    (insert
     "-------------------- End of forwarded message --------------------\n")
    (message-remove-ignored-headers b e)))

(defun message-remove-ignored-headers (b e &optional preserve-mime)
  (when (or message-forward-ignored-headers
	    message-forward-included-headers)
    (let ((saved-headers nil))
    (save-restriction
      (narrow-to-region b e)
      (goto-char b)
      (narrow-to-region (point)
			(or (search-forward "\n\n" nil t) (point)))
      ;; When forwarding as MIME, preserve some MIME headers.
      (when preserve-mime
	(let ((headers (buffer-string)))
	  (with-temp-buffer
	    (insert headers)
	    (message-remove-header
	     (if (listp message-forward-included-mime-headers)
		 (mapconcat
		  #'identity (cons "^$" message-forward-included-mime-headers)
		  "\\|")
	       message-forward-included-mime-headers)
	     t nil t)
	    (setq saved-headers (string-lines (buffer-string) t)))))
      (when message-forward-ignored-headers
	(let ((ignored (if (stringp message-forward-ignored-headers)
			   (list message-forward-ignored-headers)
			 message-forward-ignored-headers)))
	  (dolist (elem ignored)
	    (message-remove-header elem t))))
      (when message-forward-included-headers
	(message-remove-header
	 (if (listp message-forward-included-headers)
	     (mapconcat #'identity (cons "^$" message-forward-included-headers)
			"\\|")
	   message-forward-included-headers)
	 t nil t))
      ;; Insert the MIME headers, if any.
      (goto-char (point-max))
      (forward-line -1)
      (dolist (header saved-headers)
	(insert header "\n"))))))

(defun message-forward-make-body-mime (forward-buffer &optional beg end)
  (let ((b (point)))
    (insert "\n\n<#part type=message/rfc822 disposition=inline raw=t>\n")
    (save-restriction
      (narrow-to-region (point) (point))
      (insert-buffer-substring forward-buffer beg end)
      (mml-quote-region (point-min) (point-max))
      (goto-char (point-min))
      (when (looking-at "From ")
	(replace-match "X-From-Line: "))
      (message-remove-ignored-headers (point-min) (point-max) t)
      (goto-char (point-max)))
    (insert "<#/part>\n")
    ;; Consider there is no illegible text.
    (add-text-properties
     b (point)
     '(no-illegible-text t rear-nonsticky t))))

(defun message-forward-make-body-mml (forward-buffer)
  (insert "\n\n<#mml type=message/rfc822 disposition=inline>\n")
  (let ((b (point)) e)
    (if (not message-forward-decoded-p)
	(let ((contents (with-current-buffer forward-buffer (buffer-string))))
	  (unless (multibyte-string-p contents)
	    (error "Attempt to insert unibyte string from the buffer \"%s\"\
 to the multibyte buffer \"%s\""
                   forward-buffer
		   (buffer-name)))
	  (insert (mm-with-multibyte-buffer
		    (insert contents)
		    (mime-to-mml)
		    (goto-char (point-min))
		    (when (looking-at "From ")
		      (replace-match "X-From-Line: "))
		    (buffer-string))))
      (save-restriction
	(narrow-to-region (point) (point))
	(mml-insert-buffer forward-buffer)
	(goto-char (point-min))
	(when (looking-at "From ")
	  (replace-match "X-From-Line: "))
	(goto-char (point-max))))
    (setq e (point))
    (insert "<#/mml>\n")
    (when (not message-forward-decoded-p)
      (message-remove-ignored-headers b e))))

(defun message-forward-make-body-digest-plain (forward-buffer)
  (insert
   "\n-------------------- Start of forwarded message --------------------\n")
  (mml-insert-buffer forward-buffer)
  (insert
   "\n-------------------- End of forwarded message --------------------\n"))

(defun message-forward-make-body-digest-mime (forward-buffer)
  (insert "\n<#multipart type=digest>\n")
  (let ((b (point)) e)
    (insert-buffer-substring forward-buffer)
    (setq e (point))
    (insert "<#/multipart>\n")
    (save-restriction
      (narrow-to-region b e)
      (goto-char b)
      (narrow-to-region (point)
			(or (search-forward "\n\n" nil t) (point)))
      (delete-region (point-min) (point-max)))))

(defun message-forward-make-body-digest (forward-buffer)
  (if message-forward-as-mime
      (message-forward-make-body-digest-mime forward-buffer)
    (message-forward-make-body-digest-plain forward-buffer)))

(autoload 'mm-uu-dissect-text-parts "mm-uu")
(autoload 'mm-uu-dissect "mm-uu")

(defun message-signed-or-encrypted-p (&optional dont-emulate-mime handles)
  "Say whether the current buffer contains signed or encrypted message.
If DONT-EMULATE-MIME is nil, this function does the MIME emulation on
messages that don't conform to PGP/MIME described in RFC2015.  HANDLES
is for the internal use."
  (unless handles
    (let ((mm-decrypt-option 'never)
	  (mm-verify-option 'never))
      (if (setq handles (mm-dissect-buffer nil t))
	  (unless dont-emulate-mime
	    (mm-uu-dissect-text-parts handles))
	(unless dont-emulate-mime
	  (setq handles (mm-uu-dissect))))))
  ;; Check text/plain message in which there is a signed or encrypted
  ;; body that has been encoded by B or Q.
  (unless (or handles dont-emulate-mime)
    (let ((cur (current-buffer))
	  (mm-decrypt-option 'never)
	  (mm-verify-option 'never))
      (with-temp-buffer
	(insert-buffer-substring cur)
	(when (setq handles (mm-dissect-buffer t t))
	  (if (and (bufferp (car handles))
		   (equal (mm-handle-media-type handles) "text/plain"))
	      (progn
		(erase-buffer)
		(insert-buffer-substring (car handles))
		(mm-decode-content-transfer-encoding
		 (mm-handle-encoding handles))
		(mm-destroy-parts handles)
		(setq handles (mm-uu-dissect)))
	    (mm-destroy-parts handles)
	    (setq handles nil))))))
  (when handles
    (prog1
	(catch 'found
	  (dolist (handle (if (stringp (car handles))
			      (if (member (car handles)
					  '("multipart/signed"
					    "multipart/encrypted"))
				  (throw 'found t)
				(cdr handles))
			    (list handles)))
	    (if (stringp (car handle))
		(when (message-signed-or-encrypted-p dont-emulate-mime handle)
		  (throw 'found t))
	      (when (and (bufferp (car handle))
			 (equal (mm-handle-media-type handle)
				"message/rfc822"))
		(with-current-buffer (mm-handle-buffer handle)
		  (when (message-signed-or-encrypted-p dont-emulate-mime)
		    (throw 'found t)))))))
      (mm-destroy-parts handles))))

;;;###autoload
(defun message-forward-make-body (forward-buffer &optional digest)
  ;; Put point where we want it before inserting the forwarded
  ;; message.
  (if message-forward-before-signature
      (message-goto-body)
    (goto-char (point-max)))
  (if digest
      (message-forward-make-body-digest forward-buffer)
    (if message-forward-as-mime
	(if (and message-forward-show-mml
		 (not (and (eq message-forward-show-mml 'best)
			   ;; Use the raw form in the body if it contains
			   ;; signed or encrypted message so as not to be
			   ;; destroyed by re-encoding.
			   (with-current-buffer forward-buffer
			     (condition-case nil
				 (message-signed-or-encrypted-p)
			       (error t))))))
	    (message-forward-make-body-mml forward-buffer)
	  (message-forward-make-body-mime forward-buffer))
      (message-forward-make-body-plain forward-buffer)))
  (message-position-point))

(declare-function rmail-toggle-header "rmail" (&optional arg))

;;;###autoload
(defun message-forward-rmail-make-body (forward-buffer)
  (save-window-excursion
    (set-buffer forward-buffer)
    (when (rmail-msg-is-pruned)
      (rmail-toggle-header 0)))
  (message-forward-make-body forward-buffer))

;; Fixme: Should have defcustom.
;;;###autoload
(defun message-insinuate-rmail ()
  "Let RMAIL use message to forward."
  (interactive)
  (setq rmail-enable-mime-composing t)
  (setq rmail-insert-mime-forwarded-message-function
	#'message-forward-rmail-make-body))

;;;###autoload
(defun message-resend (address)
  "Resend the current article to ADDRESS."
  (interactive
   (list (message-read-from-minibuffer "Resend message to: ")))
  (message "Resending message to %s..." address)
  (save-excursion
    (let ((cur (current-buffer))
	  gcc beg)
      ;; We first set up a normal mail buffer.
      (unless (message-mail-user-agent)
	(set-buffer (gnus-get-buffer-create " *message resend*"))
	(let ((inhibit-read-only t))
	  (erase-buffer)))
      (let ((message-this-is-mail t)
	    message-generate-hashcash
	    message-setup-hook)
	(message-setup `((To . ,address))))
      ;; Insert our usual headers.
      (message-generate-headers '(From Date To Message-ID))
      (message-narrow-to-headers)
      (when (setq gcc (mail-fetch-field "gcc" nil t))
	(message-remove-header "gcc"))
      ;; Remove X-Draft-From header etc.
      (message-remove-header message-ignored-mail-headers t)
      ;; Rename them all to "Resent-*".
      (goto-char (point-min))
      (while (re-search-forward "^[A-Za-z]" nil t)
	(forward-char -1)
	(insert "Resent-"))
      (widen)
      (forward-line)
      (let ((inhibit-read-only t))
	(delete-region (point) (point-max)))
      (setq beg (point))
      ;; Insert the message to be resent.
      (insert-buffer-substring cur)
      (goto-char (point-min))
      (search-forward "\n\n")
      (forward-char -1)
      (save-restriction
	(narrow-to-region beg (point))
	(message-remove-header message-ignored-resent-headers t)
	(goto-char (point-max)))
      (insert mail-header-separator)
      ;; Rename all old ("Also-")Resent headers.
      (while (re-search-backward "^\\(Also-\\)*Resent-" beg t)
	(beginning-of-line)
	(insert "Also-"))
      ;; Quote any "From " lines at the beginning.
      (goto-char beg)
      (when (looking-at "From ")
	(replace-match "X-From-Line: "))
      ;; Send it.
      (let ((message-inhibit-body-encoding
	     ;; Don't do any further encoding if it looks like the
	     ;; message has already been encoded.
	     (let ((case-fold-search t))
	       (re-search-forward "^mime-version:" nil t)))
	    (message-inhibit-ecomplete t)
	    ;; We don't want smtpmail.el to encode anything, either.
	    (sendmail-coding-system 'raw-text)
	    (select-safe-coding-system-function nil)
	    message-required-mail-headers
	    message-generate-hashcash
	    rfc2047-encode-encoded-words
            ;; If `message-sendmail-envelope-from' is `header' then
            ;; the envelope-from will be the original sender's
            ;; address, not the resender's.  But when resending, the
            ;; envelope-from should be the resender's address.  Defuse
            ;; that particular case.
            (message-sendmail-envelope-from
             (and (not (and (eq message-sendmail-envelope-from
                                'obey-mail-envelope-from)
                            (eq mail-envelope-from 'header)))
                  (not (eq message-sendmail-envelope-from 'header))
                  message-sendmail-envelope-from)))
	(message-send-mail))
      (when gcc
	(message-goto-eoh)
	(insert "Gcc: " gcc "\n"))
      (run-hooks 'message-sent-hook)
      (kill-buffer (current-buffer)))
    (message "Resending message to %s...done" address)))

;;;###autoload
(defun message-bounce ()
  "Re-mail the current message.
This only makes sense if the current message is a bounce message that
contains some mail you have written which has been bounced back to
you."
  (interactive)
  (let ((handles (mm-dissect-buffer t))
	boundary)
    (message-pop-to-buffer (message-buffer-name "bounce"))
    (if (stringp (car handles))
	;; This is a MIME bounce.
	(mm-insert-part (car (last handles)))
      ;; This is a non-MIME bounce, so we try to remove things
      ;; manually.
      (mm-insert-part handles)
      (undo-boundary)
      (goto-char (point-min))
      (re-search-forward "\n\n+" nil t)
      (setq boundary (point))
      ;; We remove everything before the bounced mail.
      (if (or (re-search-forward message-unsent-separator nil t)
	      (progn
		(search-forward "\n\n" nil 'move)
		(re-search-backward "^Return-Path:.*\n" boundary t)))
	  (progn
	    (forward-line 1)
	    (delete-region (point-min)
			   (if (re-search-forward "^[^ \n\t]+:" nil t)
			       (match-beginning 0)
			     (point))))
	(goto-char boundary)
	(when (re-search-backward "^.?From .*\n" nil t)
	  (delete-region (match-beginning 0) (match-end 0)))))
    (mime-to-mml)
    (save-restriction
      (message-narrow-to-head-1)
      (message-remove-header message-ignored-bounced-headers t)
      (goto-char (point-max))
      (insert mail-header-separator))
    (message-position-point)))

;;;
;;; Interactive entry points for new message buffers.
;;;

;;;###autoload
(defun message-mail-other-window (&optional to subject)
  "Like `message-mail' command, but display mail buffer in another window."
  (interactive)
  (unless (message-mail-user-agent)
    (message-pop-to-buffer (message-buffer-name "mail" to)
			   'switch-to-buffer-other-window))
  (let ((message-this-is-mail t))
    (message-setup `((To . ,(or to "")) (Subject . ,(or subject "")))
		   nil nil nil 'switch-to-buffer-other-window)))

;;;###autoload
(defun message-mail-other-frame (&optional to subject)
  "Like `message-mail' command, but display mail buffer in another frame."
  (interactive)
  (unless (message-mail-user-agent)
    (message-pop-to-buffer (message-buffer-name "mail" to)
			   'switch-to-buffer-other-frame))
  (let ((message-this-is-mail t))
    (message-setup `((To . ,(or to "")) (Subject . ,(or subject "")))
		   nil nil nil 'switch-to-buffer-other-frame)))

;;;###autoload
(defun message-news-other-window (&optional newsgroups subject)
  "Start editing a news article to be sent."
  (interactive)
  (message-pop-to-buffer (message-buffer-name "posting" nil newsgroups)
			 'switch-to-buffer-other-window)
  (let ((message-this-is-news t))
    (message-setup `((Newsgroups . ,(or newsgroups ""))
		     (Subject . ,(or subject ""))))))

;;;###autoload
(defun message-news-other-frame (&optional newsgroups subject)
  "Start editing a news article to be sent."
  (interactive)
  (message-pop-to-buffer (message-buffer-name "posting" nil newsgroups)
			 'switch-to-buffer-other-frame)
  (let ((message-this-is-news t))
    (message-setup `((Newsgroups . ,(or newsgroups ""))
		     (Subject . ,(or subject ""))))))

;;; underline.el

;; This code should be moved to underline.el (from which it is stolen).

;;;###autoload
(defun message-bold-region (start end)
  "Bold all nonblank characters in the region.
Works by overstriking characters.
Called from program, takes two arguments START and END
which specify the range to operate on."
  (interactive "r")
  (save-excursion
    (let ((end1 (make-marker)))
      (move-marker end1 (max start end))
      (goto-char (min start end))
      (while (< (point) end1)
	(or (looking-at "[_\^@- ]")
	    (insert (char-after) "\b"))
	(forward-char 1)))))

;;;###autoload
(defun message-unbold-region (start end)
  "Remove all boldness (overstruck characters) in the region.
Called from program, takes two arguments START and END
which specify the range to operate on."
  (interactive "r")
  (save-excursion
    (let ((end1 (make-marker)))
      (move-marker end1 (max start end))
      (goto-char (min start end))
      (while (search-forward "\b" end1 t)
	(if (eq (char-after) (char-after (- (point) 2)))
	    (delete-char -2))))))

(defun message-exchange-point-and-mark ()
  "Exchange point and mark, but don't activate region if it was inactive."
  (goto-char (prog1 (mark t)
	       (set-marker (mark-marker) (point)))))

;; Support for toolbar
(defvar tool-bar-mode)

(defcustom message-tool-bar
  '((ispell-message "spell" nil
		    :vert-only t
		    :visible (not flyspell-mode))
    (flyspell-buffer "spell" t
		     :vert-only t
		     :visible flyspell-mode
		     :help "Flyspell whole buffer")
    (message-send-and-exit "mail/send" t :label "Send")
    (message-dont-send "mail/save-draft")
    (mml-attach-file "attach" mml-mode-map :vert-only t)
    (mml-preview "mail/preview" mml-mode-map)
    (mml-secure-message-sign-encrypt "lock" mml-mode-map :visible nil)
    (message-insert-importance-high "important" nil :visible nil)
    (message-insert-importance-low "unimportant" nil :visible nil)
    (message-insert-disposition-notification-to "receipt" nil :visible nil))
  "Specifies the message mode tool bar.

It can be either a list or a symbol referring to a list.  See
`gmm-tool-bar-from-list' for the format of the list.  The
default key map is `message-mode-map'."
  :type '(repeat gmm-tool-bar-list-item)
  :type '(choice (repeat :tag "User defined list" gmm-tool-bar-item)
		 (symbol))
  :version "29.1"
  :group 'message)

(defvar message-tool-bar-gnome nil)
(make-obsolete-variable 'message-tool-bar-gnome nil "29.1")
(defvar message-tool-bar-retro nil)
(make-obsolete-variable 'message-tool-bar-gnome nil "29.1")
(defvar message-tool-bar-zap-list t)
(make-obsolete-variable 'message-tool-bar-zap-list nil "29.1")

(defvar image-load-path)
(declare-function image-load-path-for-library "image"
		  (library image &optional path no-error))

(defun message-make-tool-bar (&optional force)
  "Make a message mode tool bar from `message-tool-bar'.
When FORCE, rebuild the tool bar."
  (when (and (boundp 'tool-bar-mode)
	     tool-bar-mode
	     (or (not message-tool-bar-map) force))
    (setq message-tool-bar-map
	  (let* ((load-path
		  (image-load-path-for-library
		   "message" "mail/save-draft.xpm" nil t))
		 (image-load-path (cons (car load-path) image-load-path)))
	    (gmm-tool-bar-from-list message-tool-bar
				    message-tool-bar-zap-list
				    'message-mode-map))))
  message-tool-bar-map)

;;; Group name and email address completion.

(defcustom message-newgroups-header-regexp
  "^\\(Newsgroups\\|Followup-To\\|Posted-To\\|Gcc\\):"
  "Regexp matching headers that list groups."
  :group 'message
  :type 'regexp)

(defcustom message-email-recipient-header-regexp
  "^\\([^ :]*-\\)?\\(To\\|B?Cc\\|From\\|Reply-to\\|Mail-Followup-To\\|Mail-Copies-To\\):"
  "Regexp matching headers that list email addresses."
  :version "29.1"
  :type 'regexp)

(defcustom message-completion-alist
  `((,message-newgroups-header-regexp . ,#'message-expand-group)
    (,message-email-recipient-header-regexp . ,#'message-expand-name))
  "Alist of (RE . FUN).  Use FUN for completion on header lines matching RE.
FUN should be a function that obeys the same rules as those
of `completion-at-point-functions'."
  :version "27.1"
  :group 'message
  :type '(alist :key-type regexp :value-type function))

(defcustom message-expand-name-databases
  '(bbdb eudc)
  "List of databases to try for name completion (`message-expand-name').
Each element can be the symbol `bbdb', the symbol `eudc', or a function."
  :group 'message
  :version "29.1"
  :type '(repeat
          (choice (const bbdb) (const eudc) function)))

(defcustom message-tab-body-function nil
  "Function to execute when `message-tab' (TAB) is executed in the body.
If nil, the function bound in `text-mode-map' or `global-map' is executed."
  :version "22.1"
  :group 'message
  :link '(custom-manual "(message)Various Commands")
  :type '(choice (const nil)
		 function))

(declare-function mail-abbrev-in-expansion-header-p "mailabbrev" ())

(defun message-tab ()
  "Complete names according to `message-completion-alist'.
Execute function specified by `message-tab-body-function' when
not in those headers.  If that variable is nil, indent with the
regular text mode tabbing command."
  (interactive nil message-mode)
  (cond
   ((let ((completion-fail-discreetly t))
      (completion-at-point))
    ;; Completion was performed; nothing else to do.
    nil)
   (message-tab-body-function (funcall message-tab-body-function))
   (t (funcall (or (lookup-key text-mode-map "\t")
                   (lookup-key global-map "\t")
                   'indent-relative)))))

(defvar mail-abbrev-mode-regexp)

(defvar message--old-style-completion-functions nil)

(defun message-completion-function ()
  (let ((alist message-completion-alist))
    (while (and alist
		(let ((mail-abbrev-mode-regexp (caar alist)))
		  (not (mail-abbrev-in-expansion-header-p))))
      (setq alist (cdr alist)))
    (when (cdar alist)
      (let ((fun (cdar alist)))
        (if (member fun message--old-style-completion-functions)
            (lambda ()
              (funcall fun)
              ;; Even if completion fails, return a non-nil value, so as to
              ;; avoid falling back to message-tab-body-function.
              'completion-attempted)
          (let ((ticks-before (buffer-chars-modified-tick))
                (data (funcall fun)))
            (if (and (eq ticks-before (buffer-chars-modified-tick))
                     (or (null data)
                         (integerp (car-safe data))))
                data
              (push fun message--old-style-completion-functions)
              ;; Completion was already performed, so just return a dummy
              ;; function that prevents trying any further.
              (lambda () 'completion-attempted))))))))

(defun message-expand-group ()
  "Expand the group name under point."
  (let ((b (save-excursion
	     (save-restriction
	       (narrow-to-region
		(save-excursion
		  (beginning-of-line)
		  (skip-chars-forward "^:")
		  (1+ (point)))
		(point))
	       (skip-chars-backward "^, \t\n") (point))))
	(completion-ignore-case t)
	(e (progn (skip-chars-forward "^,\t\n ") (point)))
	(collection (when (and (boundp 'gnus-active-hashtb)
			       gnus-active-hashtb)
		      (hash-table-keys gnus-active-hashtb))))
    (when collection
      ;; FIXME: Add `category' metadata to the collection, so we can use
      ;; substring matching on it.
      (list b e collection))))

(defcustom message-expand-name-standard-ui nil
  "If non-nil, use the standard completion UI in `message-expand-name'.
E.g. this means it will obey `completion-styles' and other such settings.

If this variable is non-nil and `message-mail-alias-type' is
`ecomplete', `message-self-insert-commands' should probably be
set to nil."
  :version "27.1"
  :type 'boolean)

(defun message-expand-name ()
  (cond (message-expand-name-standard-ui
	 (let ((beg (save-excursion
                      (skip-chars-backward "^\n:,") (skip-chars-forward " \t")
                      (point)))
               (end (save-excursion
                      (skip-chars-forward "^\n,") (skip-chars-backward " \t")
                      (point))))
           (when (< beg end)
             (list beg end (message--name-table (buffer-substring beg end))))))
	((and (memq 'eudc message-expand-name-databases)
		    (boundp 'eudc-protocol)
		    eudc-protocol)
	 (eudc-expand-inline))
	((and (memq 'bbdb message-expand-name-databases)
	      (fboundp 'bbdb-complete-name))
         (let ((starttick (buffer-modified-tick)))
           (or (bbdb-complete-name)
               ;; Apparently, bbdb-complete-name can return nil even when
               ;; completion took place.  So let's double check the buffer was
               ;; not modified.
               (/= starttick (buffer-modified-tick)))))
        ((and (functionp (car message-expand-name-databases))
              (funcall (car message-expand-name-databases))))
	(t
	 (expand-abbrev))))

(add-to-list 'completion-category-defaults '(email (styles substring
                                                           partial-completion)))

(defun message--bbdb-query-with-words (words)
  ;; FIXME: This (or something like this) should live on the BBDB side.
  (when (fboundp 'bbdb-records)
    (require 'bbdb)           ;FIXME: `bbdb-records' is incorrectly autoloaded!
    (bbdb-records)            ;Make sure BBDB and its database is initialized.
    (defvar bbdb-hashtable)
    (declare-function bbdb-record-mail "bbdb" (record))
    (declare-function bbdb-dwim-mail "bbdb-com" (record &optional mail))
    (declare-function bbdb-completion-predicate "bbdb-com" (key records))
    (let ((records '())
          (responses '()))
      (dolist (word words)
	(dolist (c (all-completions word bbdb-hashtable
	                            #'bbdb-completion-predicate))
	  (dolist (record (gethash c bbdb-hashtable))
	    (cl-pushnew record records))))
      (dolist (record records)
	(dolist (mail (bbdb-record-mail record))
	  (push (bbdb-dwim-mail record mail) responses)))
      responses)))

(defun message--name-table (orig-string)
  (let ((orig-words (split-string orig-string "[ \t]+"))
        database-responses)
    (lambda (string pred action)
      (pcase action
        ('metadata '(metadata (category . email)))
        ('lambda t)
        ((or 'nil 't)
         (when orig-words
           (dolist (db message-expand-name-databases)
             (push
              (pcase db
                ((and `eudc (guard (bound-and-true-p eudc-protocol)))
                 (eudc-query-with-words orig-words))
                (`bbdb (message--bbdb-query-with-words orig-words))
                ((pred functionp) (funcall db orig-words)))
              database-responses))
	   (ecomplete-setup)
	   (setq orig-words nil))
         (let ((candidates
	        ;; FIXME: Add `expand-abbrev'!
	        (append (mapcan (lambda (resp)
                                  (all-completions string resp pred))
                                database-responses)
	                (when (and (bound-and-true-p ecomplete-database)
	                           (fboundp 'ecomplete-completion-table))
                          (all-completions string
                                           (ecomplete-completion-table 'mail)
                                           pred)))))
	   (if action candidates (try-completion string candidates))))))))

;;; Help stuff.

(defun message-talkative-question (ask question show &rest text)
  "Call FUNCTION with argument QUESTION; optionally display TEXT... args.
If SHOW is non-nil, the arguments TEXT... are displayed in a temp buffer.
The following arguments may contain lists of values."
  (if (and show
	   (setq text (flatten-tree text)))
      (save-window-excursion
        (with-output-to-temp-buffer " *MESSAGE information message*"
          (with-current-buffer " *MESSAGE information message*"
	    (fundamental-mode)
	    (mapc #'princ text)
	    (goto-char (point-min))))
	(funcall ask question))
    (funcall ask question)))

(define-obsolete-function-alias 'message-flatten-list #'flatten-tree "27.1")

(defun message-generate-new-buffer-clone-locals (name &optional varstr)
  "Create and return a buffer with name based on NAME using `generate-new-buffer'.
Then clone the local variables and values from the old buffer to the
new one, cloning only the locals having a substring matching the
regexp VARSTR."
  (let ((oldbuf (current-buffer)))
    (with-current-buffer (generate-new-buffer name)
      (message-clone-locals oldbuf varstr)
      (current-buffer))))

(defun message-clone-locals (buffer &optional varstr)
  "Clone the local variables from BUFFER to the current buffer."
  (let ((locals (with-current-buffer buffer (buffer-local-variables)))
	(regexp "^gnus\\|^nn\\|^message\\|^sendmail\\|^smtp\\|^user-mail-address"))
    (mapcar
     (lambda (local)
       (when (and (consp local)
		  (car local)
		  (string-match regexp (symbol-name (car local)))
		  (or (null varstr)
		      (string-match varstr (symbol-name (car local)))))
	 (ignore-errors
	   ;; Cloning message-default-charset could cause an already
	   ;; encoded text to be encoded again, yielding raw bytes
	   ;; instead of characters in the message.
	   (unless (eq 'message-default-charset (car local))
	     (set (make-local-variable (car local))
		  (cdr local))))))
     locals)))

;;;
;;; MIME functions
;;;

(defun message-encode-message-body ()
  (unless message-inhibit-body-encoding
    (let ((case-fold-search t)
	  lines content-type-p)
      (message-goto-body)
      (save-restriction
	(narrow-to-region (point) (point-max))
	(let ((new (mml-generate-mime nil
				      (save-restriction
					(message-narrow-to-headers)
					(mail-fetch-field "content-type")))))
	  (when new
	    (delete-region (point-min) (point-max))
	    (insert new)
	    (goto-char (point-min))
	    (if (eq (aref new 0) ?\n)
		(delete-char 1)
	      (search-forward "\n\n")
	      (setq lines (buffer-substring (point-min) (1- (point))))
	      (delete-region (point-min) (point))))))
      (save-restriction
	(message-narrow-to-headers-or-head)
	(message-remove-header "Mime-Version")
	(goto-char (point-max))
	(insert "MIME-Version: 1.0\n")
	(when lines
	  (insert lines))
	(setq content-type-p
	      (or mml-boundary
		  (re-search-backward "^Content-Type:" nil t))))
      (save-restriction
	(message-narrow-to-headers-or-head)
	(message-remove-first-header "Content-Type")
	(message-remove-first-header "Content-Transfer-Encoding"))
      ;; We always make sure that the message has a Content-Type
      ;; header.  This is because some broken MTAs and MUAs get
      ;; awfully confused when confronted with a message with a
      ;; MIME-Version header and without a Content-Type header.  For
      ;; instance, Solaris' /usr/bin/mail.
      (unless content-type-p
	(goto-char (point-min))
	;; For unknown reason, MIME-Version doesn't exist.
	(when (re-search-forward "^MIME-Version:" nil t)
	  (forward-line 1)
	  (insert "Content-Type: text/plain; charset=us-ascii\n"))))))

(defun message-read-from-minibuffer (prompt &optional initial-contents)
  "Read from the minibuffer while providing abbrev expansion."
  (let ((minibuffer-setup-hook 'mail-abbrevs-setup)
	(minibuffer-local-map message-minibuffer-local-map))
    (read-from-minibuffer prompt initial-contents)))

(defun message-use-alternative-email-as-from ()
  "Set From field of the outgoing message to the first matching
address in `message-alternative-emails', looking at To, Cc and
From headers in the original article."
  (require 'mail-utils)
  (let* ((fields '("To" "Cc" "From"))
	 (emails
	  (message-tokenize-header
	   (mail-strip-quoted-names
	    (mapconcat
	     #'identity
	     (cl-loop for field in fields
		      for value = (message-fetch-reply-field field)
		      when value
		      collect value)
	     ","))))
	 (email
          (cond ((functionp message-alternative-emails)
                 (car (cl-remove-if-not message-alternative-emails emails)))
                (t (cl-loop for email in emails
                            if (string-match-p message-alternative-emails email)
                            return email)))))
    (unless (or (not email) (equal email user-mail-address))
      (message-remove-header "From")
      (goto-char (point-max))
      (insert "From: " (let ((user-mail-address email)) (message-make-from))
	      "\n"))))

(defun message-options-get (symbol)
  (cdr (assq symbol message-options)))

(defun message-options-set (symbol value)
  (let ((the-cons (assq symbol message-options)))
    (if the-cons
	(if value
	    (setcdr the-cons value)
	  (setq message-options (delq the-cons message-options)))
      (and value
	   (push (cons symbol value) message-options))))
  value)

(defun message-options-set-recipient ()
  (save-restriction
    (message-narrow-to-headers-or-head)
    (message-options-set 'message-sender
			 (mail-strip-quoted-names
			  (message-fetch-field "from")))
    (message-options-set 'message-recipients
			 (mail-strip-quoted-names
			  (let ((to (message-fetch-field "to"))
				(cc (message-fetch-field "cc"))
				(bcc (message-fetch-field "bcc")))
			    (concat
			     (or to "")
			     (if (and to cc) ", ")
			     (or cc "")
			     (if (and (or to cc) bcc) ", ")
			     (or bcc "")))))))

(defun message-hide-headers ()
  "Hide headers based on the `message-hidden-headers' variable."
  (let ((regexps (if (stringp message-hidden-headers)
		     (list message-hidden-headers)
		   message-hidden-headers))
	(inhibit-modification-hooks t)
	end-of-headers)
    (when regexps
      (save-excursion
	(save-restriction
	  (message-narrow-to-headers)
          (setq end-of-headers (point-min-marker))
	  (goto-char (point-min))
	  (while (not (eobp))
	    (if (not (message-hide-header-p regexps))
		(message-next-header)
	      (let ((begin (point)))
		(message-next-header)
                (let ((header (delete-and-extract-region begin (point))))
                  (save-excursion
                    (goto-char end-of-headers)
                    (insert-before-markers header))))))))
      (narrow-to-region end-of-headers (point-max)))))

(defun message-hide-header-p (regexps)
  (let ((result nil)
	(reverse nil))
    (when (eq (car regexps) 'not)
      (setq reverse t)
      (pop regexps))
    (dolist (regexp regexps)
      (setq result (or result (looking-at regexp))))
    (if reverse
	(not result)
      result)))

(declare-function ecomplete-add-item "ecomplete" (type key text))
(declare-function ecomplete-save "ecomplete" ())

(defun message-put-addresses-in-ecomplete ()
  (require 'ecomplete)
  (dolist (header '("to" "cc" "from" "reply-to"))
    (let ((value (message-field-value header)))
      (dolist (string (mail-header-parse-addresses value 'raw))
	(setq string
	      (string-replace
	       "\n" ""
	       (replace-regexp-in-string "^ +\\| +$" "" string)))
	(ecomplete-add-item 'mail (car (mail-header-parse-address string))
			    string))))
  (ecomplete-save))

(autoload 'ecomplete-display-matches "ecomplete")

(defun message--in-tocc-p ()
  (and (memq (char-after (line-beginning-position)) '(?C ?T ?\t ? ))
       (message-point-in-header-p)
       (save-excursion
	 (beginning-of-line)
	 (while (and (memq (char-after) '(?\t ? ))
		     (zerop (forward-line -1))))
	 (looking-at "To:\\|Cc:"))))

(defun message-display-abbrev (&optional choose)
  "Display the next possible abbrev for the text before point."
  (interactive (list t) message-mode)
  (when (message--in-tocc-p)
    (let* ((end (point))
	   (start (save-excursion
		    (and (re-search-backward "[\n\t ]" nil t)
			 (1+ (point)))))
	   (word (when start (buffer-substring start end)))
	   (match (when (and word
			     (not (zerop (length word))))
		    (ecomplete-display-matches 'mail word choose))))
      (when (and choose match)
	(delete-region start end)
	(insert match)))))

(defun message-ecomplete-capf ()
  "Return completion data for email addresses in Ecomplete.
Meant for use on `completion-at-point-functions'."
  (when (and (bound-and-true-p ecomplete-database)
             (fboundp 'ecomplete-completion-table)
             (message--in-tocc-p))
    (let ((end (save-excursion
                 (skip-chars-forward "^, \t\n")
                 (point)))
	  (start (save-excursion
                   (skip-chars-backward "^, \t\n")
                   (point))))
      `(,start ,end ,(ecomplete-completion-table 'mail)))))

;; To send pre-formatted letters like the example below, you can use
;; `message-send-form-letter':
;; --8<---------------cut here---------------start------------->8---
;; To: alice@invalid.invalid
;; Subject: Verification of your contact information
;; From: Contact verification <admin@foo.invalid>
;; --text follows this line--
;; Hi Alice,
;; please verify that your contact information is still valid:
;; Alice A, A avenue 11, 1111 A town, Austria
;; ----------next form letter message follows this line----------
;; To: bob@invalid.invalid
;; Subject: Verification of your contact information
;; From: Contact verification <admin@foo.invalid>
;; --text follows this line--
;; Hi Bob,
;; please verify that your contact information is still valid:
;; Bob, B street 22, 22222 Be town, Belgium
;; ----------next form letter message follows this line----------
;; To: charlie@invalid.invalid
;; Subject: Verification of your contact information
;; From: Contact verification <admin@foo.invalid>
;; --text follows this line--
;; Hi Charlie,
;; please verify that your contact information is still valid:
;; Charlie Chaplin, C plaza 33, 33333 C town, Chile
;; --8<---------------cut here---------------end--------------->8---

;; FIXME: What is the most common term (circular letter, form letter, serial
;; letter, standard letter) for such kind of letter?  See also
;; <https://en.wikipedia.org/wiki/Form_letter>

;; FIXME: Maybe extent message-mode's font-lock support to recognize
;; `message-form-letter-separator', i.e. highlight each message like a single
;; message.

(defcustom message-form-letter-separator
  "\n----------next form letter message follows this line----------\n"
  "Separator for `message-send-form-letter'."
  ;; :group 'message-form-letter
  :group 'message-various
  :version "23.1" ;; No Gnus
  :type 'string)

(defcustom message-send-form-letter-delay 1
  "Delay in seconds when sending a message with `message-send-form-letter'.
Only used when `message-send-form-letter' is called with non-nil
argument `force'."
  ;; :group 'message-form-letter
  :group 'message-various
  :version "23.1" ;; No Gnus
  :type 'integer)

(defun message-send-form-letter (&optional force)
  "Sent all form letter messages from current buffer.
Unless FORCE, prompt before sending.

The messages are separated by `message-form-letter-separator'.
Header and body are separated by `mail-header-separator'."
  (interactive "P" message-mode)
  (let ((sent 0) (skipped 0)
	start end text
	buff
	to done)
    (goto-char (point-min))
    (while (not done)
      (setq start (point)
	    end (if (search-forward message-form-letter-separator nil t)
		    (- (point) (length message-form-letter-separator) -1)
		  (setq done t)
		  (point-max)))
      (setq text
	    (buffer-substring-no-properties start end))
      (setq buff (generate-new-buffer "*mail - form letter*"))
      (with-current-buffer buff
	(insert text)
	(message-mode)
	(setq to (message-fetch-field "To"))
	(switch-to-buffer buff)
	(when force
	  (sit-for message-send-form-letter-delay))
	(if (or force
		  (y-or-n-p (format-message "Send message to `%s'? " to)))
	    (progn
	      (setq sent (1+ sent))
	      (message-send-and-exit))
	  (message "Message to `%s' skipped." to)
	  (setq skipped (1+ skipped)))
	(when (buffer-live-p buff)
	  (kill-buffer buff))))
    (message "%s message(s) sent, %s skipped." sent skipped)))

(defun message-replace-header (header new-value &optional after force)
  "Remove HEADER and insert the NEW-VALUE.
If AFTER, insert after this header.  AFTER may be a list of
headers.  If FORCE, insert new field even if NEW-VALUE is empty."
  ;; Similar to `nnheader-replace-header' but for message buffers.
  (save-excursion
    (save-restriction
      (message-narrow-to-headers)
      (message-remove-header header))
    (when (or force (> (length new-value) 0))
      (apply #'message-position-on-field header
             (if (listp after)
                 after
               (list after)))
      (insert new-value))))

(make-obsolete-variable
 'message-recipients-without-full-name
 "Recipients are simplified by default" "27.1")
(defcustom message-recipients-without-full-name
  (list "ding@gnus.org"
	"bugs@gnus.org"
	"emacs-devel@gnu.org"
	"emacs-pretest-bug@gnu.org"
	"bug-gnu-emacs@gnu.org")
  "Mail addresses that have no full name.
Used in `message-simplify-recipients'."
  ;; Maybe the addresses could be extracted from
  ;; `gnus-parameter-to-list-alist'?
  :type '(choice (const :tag "None" nil)
		 (repeat string))
  :version "23.1" ;; No Gnus
  :group 'message-headers)

(make-obsolete 'message-simplify-recipients nil "27.1")
(defun message-simplify-recipients ()
  (interactive nil message-mode)
  (dolist (hdr '("Cc" "To"))
    (message-replace-header
     hdr
     (mapconcat
      (lambda (addrcomp)
	(if (and message-recipients-without-full-name
		 (string-match
		  (regexp-opt message-recipients-without-full-name)
		  (cadr addrcomp)))
	    (cadr addrcomp)
	  (if (car addrcomp)
	      (message-make-from (car addrcomp) (cadr addrcomp))
	    (cadr addrcomp))))
      (when (message-fetch-field hdr)
	(mail-extract-address-components
	 (message-fetch-field hdr) t))
      ", "))))

;;; multipart/related and HTML support.

(defun message-make-html-message-with-image-files (files)
  "Make a message containing the current dired-marked image files."
  (interactive (list (dired-get-marked-files nil current-prefix-arg))
	       dired-mode)
  (message-mail)
  (message-goto-body)
  (insert "<#part type=text/html>\n\n")
  (dolist (file files)
    (insert (format "<img src=%S>\n\n" file)))
  (message-toggle-image-thumbnails)
  (message-goto-to))

(defun message-toggle-image-thumbnails ()
  "For any included image files, insert a thumbnail of that image."
  (interactive nil message-mode)
  (let ((displayed nil))
    (save-excursion
      (goto-char (point-min))
      (while (not (eobp))
	(when-let* ((props (get-text-property (point) 'display)))
	  (when (and (consp props)
		     (eq (car props) 'image))
	    (put-text-property (point) (1+ (point)) 'display nil)
	    (setq displayed t)))
	(forward-char 1)))
    (unless displayed
      (save-excursion
	(goto-char (point-min))
	(while (re-search-forward "<img.*src=\"\\([^\"]+\\).*>" nil t)
	  (let ((string (match-string 0))
		(file (match-string 1))
		(edges (window-inside-pixel-edges
			(get-buffer-window (current-buffer)))))
	    (delete-region (match-beginning 0) (match-end 0))
	    (insert-image
	     (create-image
	      file 'imagemagick nil
	      :max-width (truncate
			  (* 0.7 (- (nth 2 edges) (nth 0 edges))))
	      :max-height (truncate
			   (* 0.5 (- (nth 3 edges) (nth 1 edges)))))
	     string)))))))

(defun message-insert-screenshot (delay)
  "Take a screenshot and insert in the current buffer.
DELAY (the numeric prefix) says how many seconds to wait before
starting the screenshotting process.

The `message-screenshot-command' variable says what command is
used to take the screenshot."
  (interactive "p" message-mode)
  (unless (executable-find (car message-screenshot-command))
    (error "Can't find %s to take the screenshot"
	   (car message-screenshot-command)))
  (cl-decf delay)
  (unless (zerop delay)
    (dotimes (i delay)
      (message "Sleeping %d second%s..."
	       (- delay i)
	       (if (= (- delay i) 1)
		   ""
		 "s"))
      (sleep-for 1)))
  (message "Take screenshot")
  (let ((image
	 (with-temp-buffer
	   (set-buffer-multibyte nil)
	   (apply #'call-process
		  (car message-screenshot-command) nil (current-buffer) nil
		  (cdr message-screenshot-command))
	   (buffer-string))))
    (message--yank-media-image-handler 'image/png image)
    (message "")))

(defun message--yank-media-image-handler (type image)
  (set-mark (point))
  (insert-image
   (create-image image (mailcap-mime-type-to-extension type) t
		 :max-width (truncate (* (frame-pixel-width) 0.8))
		 :max-height (truncate (* (frame-pixel-height) 0.8))
		 :scale 1)
   (message--image-part-string type image)
   nil nil t)
  (insert "\n\n"))

(defun message--image-part-string (type image)
  (format "<#part type=\"%s\" disposition=inline data-encoding=base64 raw=t>\n%s\n<#/part>"
          type
	  ;; Get a base64 version of the image -- this avoids later
	  ;; complications if we're auto-saving the buffer and
	  ;; restoring from a file.
	  (with-temp-buffer
	    (set-buffer-multibyte nil)
	    (insert image)
	    (base64-encode-region (point-min) (point-max) t)
	    (buffer-string))))

(declare-function image-crop--content-type "image-crop")
(defun message--update-image-crop (_text image)
  (message--image-part-string (image-crop--content-type image) image))

(declare-function gnus-url-unhex-string "gnus-util")

(defun message-parse-mailto-url (url)
  "Parse a mailto: url."
  (setq url (string-replace "\n" " " url))
  (when (string-match "mailto:/*\\(.*\\)" url)
    (setq url (substring url (match-beginning 1) nil)))
  (setq url (if (string-match "^\\?" url)
		(substring url 1)
	      (if (string-match "^\\([^?]+\\)\\?\\(.*\\)" url)
		  (concat "to=" (match-string 1 url) "&"
			  (match-string 2 url))
		(concat "to=" url))))
  (let (retval pairs cur key val)
    (setq pairs (split-string url "&"))
    (while pairs
      (setq cur (car pairs)
	    pairs (cdr pairs))
      (if (not (string-match "=" cur))
	  nil                           ; Grace
	(setq key (downcase (gnus-url-unhex-string
			     (substring cur 0 (match-beginning 0))))
	      val (gnus-url-unhex-string (substring cur (match-end 0) nil) t))
	(setq cur (assoc key retval))
	(if cur
	    (setcdr cur (cons val (cdr cur)))
	  (setq retval (cons (list key val) retval)))))
    retval))

;;;###autoload
(defun message-mailto (&optional url)
  "Command to parse command line mailto: links.
This is meant to be used for MIME handlers: Setting the handler
for \"x-scheme-handler/mailto;\" to \"emacs -f message-mailto %u\"
will then start up Emacs ready to compose mail.  For emacsclient use
  emacsclient -e \\='(message-mailto \"%u\")'"
  (interactive)
  ;; <a href="mailto:someone@example.com?subject=This%20is%20the%20subject&cc=someone_else@example.com&body=This%20is%20the%20body">Send email</a>
  (message-mail)
  (message-mailto-1 (or url (pop command-line-args-left))))

(defun message-mailto-1 (url)
  (let ((args (message-parse-mailto-url url)))
    (dolist (arg args)
      (unless (equal (car arg) "body")
	(message-position-on-field (capitalize (car arg)))
	(insert (string-replace
		 "\r\n" "\n"
		 (mapconcat #'identity (reverse (cdr arg)) ", ")))))
    (when (assoc "body" args)
      (message-goto-body)
      (dolist (body (cdr (assoc "body" args)))
	(insert body "\n")))
    (if (assoc "subject" args)
	(message-goto-body)
      (message-goto-subject))))

(provide 'message)

(make-obsolete-variable 'message-load-hook
                        "use `with-eval-after-load' instead." "28.1")
(run-hooks 'message-load-hook)

;; Local Variables:
;; coding: utf-8
;; End:

;;; message.el ends here

debug log:

solving e609aa7405 ...
found e609aa7405 in https://yhetil.org/emacs/87sfhzko9s.fsf@ericabrahamsen.net/ ||
	https://yhetil.org/emacs/87sfigx58k.fsf@ericabrahamsen.net/
found 3bbd68bdcd in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 3bbd68bdcd7e9473c79da50158298bb3ae17b515	lisp/gnus/message.el

applying [1/1] https://yhetil.org/emacs/87sfhzko9s.fsf@ericabrahamsen.net/
diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index 3bbd68bdcd..e609aa7405 100644

Checking patch lisp/gnus/message.el...
Applied patch lisp/gnus/message.el cleanly.

skipping https://yhetil.org/emacs/87sfigx58k.fsf@ericabrahamsen.net/ for e609aa7405
index at:
100644 e609aa7405a5e1e3b7e2af0bf6a0d8c8f163ad49	lisp/gnus/message.el

(*) 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.