all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob ebc679a8fcd6da0e967413d17a30e9b868034678 176854 bytes (raw)
name: lisp/woman.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
 
;;; woman.el --- browse UN*X manual pages `wo (without) man'

;; Copyright (C) 2000-2020 Free Software Foundation, Inc.

;; Author: Francis J. Wright <F.J.Wright@qmul.ac.uk>
;; Maintainer: emacs-devel@gnu.org
;; Keywords: help, unix
;; Adapted-By: Eli Zaretskii <eliz@gnu.org>
;; Old-Version: 0.551
;; URL: http://centaur.maths.qmul.ac.uk/Emacs/WoMan/

;; 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:

;; WoMan implements a subset of the formatting performed by the Emacs
;; `man' (or `manual-entry') command to format a UN*X manual `page'
;; for display, but without calling any external programs.  It is
;; intended to emulate the whole of the -man macro package, plus those
;; ?roff requests that are most commonly used in man pages.  However,
;; the emulation is modified to include the reformatting done by the
;; Emacs `man' command.  No hyphenation is performed.

;; Advantages

;;   Much more direct, does not require any external programs.
;;   Supports completion on man page names.

;; Disadvantages

;;   Not a complete emulation.  Currently no support for eqn or tbl.
;;   Slightly slower for large man pages (but usually faster for
;;   small- and medium-size pages).

;; This browser works quite well on simple well-written man files.  It
;; works less well on idiosyncratic files that `break the rules' or
;; use the more obscure ?roff requests directly.  Current test results
;; are available in the file woman.status.

;; WoMan supports the use of compressed man files via
;; `auto-compression-mode' by turning it on if necessary.  But you may
;; need to adjust the user option `woman-file-compression-regexp'.

;; Read on for (currently) the only documentation for WoMan!

;; See also the documentation for the WoMan interactive commands and
;; user option variables, all of which begin with the prefix `woman-'.
;; This can be done most easily by loading WoMan and then running the
;; command `woman-mini-help', or selecting the WoMan menu option `Mini
;; Help' when WoMan is running.

;; WoMan is still under development!  Please let me know what doesn't
;; work -- I am adding and improving functionality as testing shows
;; that it is necessary.  See below for guidance on reporting bugs.

;; Recommended use
;; ===============

;; Put this in your .emacs:
;;   (autoload 'woman "woman"
;;             "Decode and browse a UN*X man page." t)
;;   (autoload 'woman-find-file "woman"
;;             "Find, decode and browse a specific UN*X man-page file." t)

;; Then either (1 -- *RECOMMENDED*): If the `MANPATH' environment
;; variable is set then WoMan will use it; otherwise you may need to
;; reset the Lisp variable `woman-manpath', and you may also want to
;; set the Lisp variable `woman-path'.  Please see the online
;; documentation for these variables.  Now you can execute the
;; extended command `woman', enter or select a manual entry topic,
;; using completion, and if necessary select a filename, using
;; completion.  By default, WoMan suggests the word nearest to the
;; cursor in the current buffer as the topic.

;; Or (2): Execute the extended command `woman-find-file' and enter a
;; filename, using completion.  This mode of execution may be useful
;; for temporary files outside the standard UN*X manual directory
;; structure.

;; Or (3): Put the next two sexpr's in your .emacs:
;; (autoload 'woman-dired-find-file "woman"
;;   "In dired, run the WoMan man-page browser on this file." t)
;; (add-hook 'dired-mode-hook
;;          (lambda ()
;;            (define-key dired-mode-map "W" 'woman-dired-find-file)))
;; and open the directory containing the man page file using dired,
;; put the cursor on the file, and press `W'.

;; In each case, the result should (!) be a buffer in Man mode showing
;; a formatted manual entry.  When called from WoMan, Man mode should
;; work as advertised, but modified where necessary in the context of
;; WoMan.  (However, `Man' will still invoke the standard Emacs
;; manual-browsing facility rather than `WoMan' -- this is
;; intentional!)

;; (By default, WoMan will automatically define the dired keys "W" and
;; "w" when it loads, but only if they are not already defined.  This
;; behavior is controlled by the user option `woman-dired-keys'.
;; Note that the `dired-x' (dired extra) package binds
;; `dired-copy-filename-as-kill' to the key "w" (as pointed out by Jim
;; Davidson), although "W" appears to be really unused.  The `dired-x'
;; package will over-write the WoMan binding to "w", whereas (by
;; default) WoMan will not overwrite the `dired-x' binding.)

;; Using the word at point as the default topic
;; ============================================

;; The `woman' command uses the word nearest to point in the current
;; buffer as the default topic to look up if it matches the name of a
;; manual page installed on the system.  The default topic can also be
;; used without confirmation by setting the user-option
;; `woman-use-topic-at-point' to t; thanks to Benjamin Riefenstahl for
;; suggesting this functionality.

;; The variable `woman-use-topic-at-point' can be rebound locally,
;; which may be useful to provide special private key bindings, e.g.

;;  (global-set-key "\C-cw"
;;  		  (lambda ()
;;  		    (interactive)
;;  		    (let ((woman-use-topic-at-point t))
;;  		      (woman)))))


;; Customization, Hooks and Imenu
;; ==============================

;; WoMan supports the GNU Emacs customization facility, and puts
;; a customization group called `WoMan' in the `Help' group under the
;; top-level `Emacs' group.  In order to be able to customize WoMan
;; without first loading it, add the following sexp to your .emacs:

;;  (defgroup woman nil
;;     "Browse UNIX manual pages `wo (without) man'."
;;     :tag "WoMan" :group 'help :load "woman")


;; WoMan currently runs two hooks: `woman-pre-format-hook' immediately
;; before formatting a buffer and `woman-post-format-hook' immediately
;; after formatting a buffer.  These hooks can be used for special
;; customizations that require code to be executed, etc., although
;; most customization should be possible by setting WoMan user option
;; variables, e.g. in `.emacs' and should NOT require the use of the
;; hooks.  `woman-pre-format-hook' might be appropriate for face
;; customization, whereas `woman-post-format-hook' might be
;; appropriate for installing a dynamic menu using `imenu' (although
;; it is better to use the built-in WoMan imenu support).

;; The WoMan menu provides an option to make a contents menu for the
;; current man page (using imenu).  Alternatively, if you set the
;; variable `woman-imenu' to t then WoMan will do it automatically
;; for every man page.  The menu title is the value of the variable
;; `woman-imenu-title', which is "CONTENTS" by default.  By default,
;; the menu shows manual sections and subsections, but you can change
;; this by changing the value of `woman-imenu-generic-expression'.
;; This facility is not yet widely tested and may be fooled by obscure
;; man pages that `break the rules'.

;; WoMan is configured not to replace spaces in an imenu *Completion*
;; buffer.  For further documentation of the use of imenu, such as
;; menu sorting, see the source file imenu.el, which is distributed
;; with GNU Emacs.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; Howard Melman made (essentially) the following suggestions, which
;; are slightly different from the expression that I currently use.
;; You may prefer one of Howard's suggestions, which I think assume
;; that `case-fold-search' is t (which it is by default):

;; (setq woman-imenu-generic-expression
;;       '((nil "^\\(   \\)?\\([A-Z][A-Z ]+[A-Z]\\)[ \t]*$" 2)))

;; will give support for .SH and .SS, though it won't show the heading
;; name hierarchy.  If you just want .SH in the imenu then use:

;; (setq woman-imenu-generic-expression
;;       '((nil "^\\([A-Z][A-Z ]+[A-Z]\\)[ \t]*$" 1)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


;; Vertical spacing and blank lines
;; ================================

;; The number of consecutive blank lines in the formatted buffer
;; should be either 0 or 1.  A blank line should leave a space like
;; .sp 1 (p. 14).  Current policy is to output vertical space only
;; immediately before text is output.


;; Horizontal and vertical spacing and resolution
;; ==============================================

;; WoMan currently assumes 10 characters per inch horizontally, hence
;; a horizontal resolution of 24 basic units, and 5 lines per inch
;; vertically, hence a vertical resolution of 48 basic units.  (nroff
;; uses 240 per inch).


;; The *WoMan-Log* buffer
;; ======================

;; This is modeled on the byte-compiler.  It logs all files formatted
;; by WoMan, and if WoMan finds anything that it cannot handle then it
;; writes a warning to this buffer.  If the variable `woman-show-log'
;; is non-nil (by default it is nil) then WoMan automatically
;; displays this buffer.  Many WoMan warnings can be completely
;; ignored, because they are reporting the fact that WoMan has ignored
;; requests that it is correct to ignore.  In some future version this
;; level of paranoia will be reduced, but not until WoMan is more
;; reliable.  At present, all warnings should be treated with some
;; suspicion.  Uninterpreted escape sequences are also logged (in some
;; cases).

;; Uninterpreted ?roff requests can optionally be left in the
;; formatted buffer to indicate precisely where they occur by
;; resetting the variable `woman-ignore' to nil (by default it is
;; t).

;; Automatic initiation of woman decoding

;; (Probably not a good idea.  If you use it, be careful!)

;; Put something like this in your .emacs.  The call to
;; set-visited-file-name is to avoid font-locking triggered by
;; automatic major mode selection.

;; (autoload 'woman-decode-region "woman")

;; (setq format-alist
;;       (cons
;;        '(man "UN*X man-page source format" "\\.\\(TH\\|ig\\) "
;; 	     woman-decode-region nil nil
;; 	     (lambda (arg)
;; 		set-visited-file-name
;; 		(file-name-sans-extension buffer-file-name)))))
;;       format-alist))


;; Reporting Bugs
;; ==============

;; If WoMan fails completely, or formats a file incorrectly
;; (i.e. obviously wrongly or significantly differently from man) or
;; inelegantly, then please

;; (a) check that you are running the latest version of woman.el
;;     available from my web site (see above),

;; (b) check that the problem is not already described in the file
;;     woman.status, also available from my web site.

;; If both of the above are true then please email me the entry from
;; the *WoMan-Log* buffer relating to the problem file, together with
;; a brief description of the problem.  Please indicate where you got
;; the source file from, but do not send it to me unless I ask you to!
;; Thanks.  (There is at present no automated bug-reporting facility
;; for WoMan.)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; NOTE:

;; CASE-DEPENDENCE OF FILENAMES.  By default, WoMan ignores case in
;; file pathnames only when it seems appropriate.  MS-Windows users
;; who want complete case independence should set the NTEmacs variable
;; `w32-downcase-file-names' to t and use all lower case when
;; setting WoMan file paths.

;; (1) INCOMPATIBLE CHANGE!  WoMan no longer uses a persistent topic
;; cache by default.  (It caused too much confusion!)  Explicitly set
;; the variable `woman-cache-filename' to save the cache between Emacs
;; sessions.  This is recommended only if the command `woman' is too
;; slow the first time that it is run in an Emacs session, while it
;; builds its cache in main memory, which MAY be VERY slow.

;; (2) The user option `woman-cache-level' controls the amount of
;; information cached (in main memory and, optionally, saved to disc).

;; (3) UPDATING THE CACHE.  A prefix argument always causes the
;; `woman' command (only) to rebuild its topic cache, and to re-save
;; it to `woman-cache-filename' if this variable has a non-nil value.
;; This is necessary if the NAMES (not contents) of any of the
;; directories or files in the paths specified by `woman-manpath' or
;; `woman-path' change.  If WoMan user options that affect the cache
;; are changed then WoMan will automatically update its cache file on
;; disc (if one is in use) the next time it is run in a new Emacs
;; session.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


;; TO DO
;; =====

;; Reconsider case sensitivity of file names.
;; MUST PROCESS .if, .nr IN ORDER ENCOUNTERED IN FILE! (rcsfile, mf).
;; Allow general delimiter in `\v', cf. `\h'.
;; Improve major-mode documentation.
;; Pre-process conditionals in macro bodies if possible for speed?
;; Emulate more complete preprocessor support for tbl (.TS/.TE)
;; Emulate some preprocessor support for eqn (.EQ/.EN)
;; Re-write filling and adjusting code!
;; Allow word wrap at comma (for long option lists)?
;; Buffer list handling not quite right.
;; Make 10 or 12 pitch (cpi) optional -- 12 => ll = 78
;; Use unpaddable space for tabbing?
;; Tidy up handling of fonts when filling and adjusting
;;   -- see text/text properties?
;; Improve speed
;; Add font-lock support (for quoted strings, etc.)?
;; Optionally save large files in enriched format?
;; Add apropos facility by searching NAME (?) entry in man files?
;; Documentation -- optional auto-display of formatted WoMan man page?
;; Implement a bug reporter?
;; Support diversion and traps (to some extent) - for Tcl/tk pages?
;; Add a menu of WoMan buffers?
;; Fix .fc properly?


;; Implementation strategy [this description is now well out of date!]
;; -- three main passes, each to process respectively:

;;   1) non-breaking `.' requests including font macros
;;   2) \ escape sequences, mainly special characters and font changes
;;   3) breaking `.' requests, mainly filling and justification

;; For each pass, a control function finds and pre-processes the
;; escape or request and then calls the appropriate function to
;; perform the required formatting.  Based originally on enriched.el
;; and format.el.

;; The background information that made this project possible is
;; freely available courtesy of Bell Labs from
;; http://cm.bell-labs.com/7thEdMan/


;; Acknowledgments
;; ===============

;; For Heather, Kathryn and Madelyn, the women in my life
;; (although they will probably never use it)!

;; I also thank the following for helpful suggestions, bug reports,
;; code fragments, general interest, etc.:
;;   Jari Aalto <jari.aalto@cs.tpu.fi>
;;   Dean Andrews <dean@dra.com>
;;   Juanma Barranquero <lekktu@gmail.com>
;;   Karl Berry <kb@cs.umb.edu>
;;   Jim Chapman <jchapman@netcomuk.co.uk>
;;   Kin Cho <kin@neoscale.com>
;;   Frederic Corne <frederic.corne@erli.fr>
;;   Peter Craft <craft@alacritech.com>
;;   Charles Curley <ccurley@trib.com>
;;   Jim Davidson <jdavidso@teknowledge.com>
;;   Kevin D'Elia <Kevin.DElia@mci.com>
;;   John Fitch <jpff@maths.bath.ac.uk>
;;   Hans Frosch <jwfrosch@rish.b17c.ingr.com>
;;   Guy Gascoigne-Piggford <ggp@informix.com>
;;   Brian Gorka <gorkab@sanchez.com>
;;   Nicolai Henriksen <nhe@lyngso-industri.dk>
;;   Thomas Herchenroeder <the@software-ag.de>
;;   Alexander Hinds <ahinds@thegrid.net>
;;   Stefan Hornburg <sth@hacon.de>
;;   Theodore Jump <tjump@cais.com>
;;   David Kastrup <dak@gnu.org>
;;   Paul Kinnucan <paulk@mathworks.com>
;;   Jonas Linde <jonas@init.se>
;;   Andrew McRae <andrewm@optimation.co.nz>
;;   Howard Melman <howard@silverstream.com>
;;   Dennis Pixton <dennis@math.binghamton.edu>
;;   T. V. Raman <raman@Adobe.COM>
;;   Bruce Ravel <bruce.ravel@nist.gov>
;;   Benjamin Riefenstahl <benny@crocodial.de>
;;   Kevin Ruland <kruland@seistl.com>
;;   Tom Schutter <tom@platte.com>
;;   Wei-Xue Shi <wxshi@ma.neweb.ne.jp>
;;   Fabio Somenzi <fabio@joplin.colorado.edu>
;;   Karel Sprenger <ks@ic.uva.nl>
;;   Chris Szurgot <szurgot@itribe.net>
;;   Paul A. Thompson <pat@po.cwru.edu>
;;   Arrigo Triulzi <arrigo@maths.qmw.ac.uk>
;;   Geoff Voelker <voelker@cs.washington.edu>
;;   Eli Zaretskii <eliz@gnu.org>

\f
;;; Code:

(defvar woman-version "0.551 (beta)" "WoMan version information.")
(make-obsolete-variable 'woman-version nil "28.1")

(require 'man)
(require 'button)
(define-button-type 'WoMan-xref-man-page
  :supertype 'Man-abstract-xref-man-page
  'func (lambda (arg)
	  (woman
	   ;; `woman' cannot deal with arguments that contain a
	   ;; section name, like close(2), so strip the section name.
	   (if (string-match Man-reference-regexp arg)
	       (substring arg 0 (match-end 1))
	     arg))))

(eval-when-compile			; to avoid compiler warnings
  (require 'cl-lib)
  (require 'dired)
  (require 'apropos))

(defun woman-parse-colon-path (paths)
  "Explode search path string PATHS into a list of directory names.
Allow Cygwin colon-separated search paths on Microsoft platforms.
Replace null components by calling `woman-parse-man.conf'.
As a special case, if PATHS is nil then replace it by calling
`woman-parse-man.conf'."
  ;; Based on suggestions by Jari Aalto and Eli Zaretskii.
  ;; parse-colon-path returns nil for a null path component and
  ;; an empty substring of MANPATH denotes the default list.
  (if (memq system-type '(windows-nt ms-dos))
      (cond ((null paths)
	     (mapcar 'woman-Cyg-to-Win (woman-parse-man.conf)))
	    ((string-match-p ";" paths)
	     ;; Assume DOS-style path-list...
	     (mapcan			; splice list into list
	      (lambda (x)
		(if x
		    (list x)
		  (mapcar 'woman-Cyg-to-Win (woman-parse-man.conf))))
	      (parse-colon-path paths)))
	    ((string-match-p "\\`[a-zA-Z]:" paths)
	     ;; Assume single DOS-style path...
	     (list paths))
	    (t
	     ;; Assume UNIX/Cygwin-style path-list...
	     (mapcan			; splice list into list
	      (lambda (x)
		(mapcar 'woman-Cyg-to-Win
			(if x (list x) (woman-parse-man.conf))))
	      (let ((path-separator ":"))
		(parse-colon-path paths)))))
    ;; Assume host-default-style path-list...
    (mapcan				; splice list into list
     (lambda (x) (if x (list x) (woman-parse-man.conf)))
     (parse-colon-path (or paths "")))))

(defun woman-Cyg-to-Win (file)
  "Convert an absolute filename FILE from Cygwin to Windows form."
  ;; MANPATH_MAP conses are not converted since they presumably map
  ;; Cygwin to Cygwin form.
  (if (consp file)
      file
    ;; Code taken from w32-symlinks.el
    (if (eq (aref file 0) ?/)
	;; Try to use Cygwin mount table via `cygpath.exe'.
	(condition-case nil
	    (with-temp-buffer
	      ;; cygpath -m file
	      (call-process "cygpath" nil t nil "-m" file)
	      (buffer-substring 1 (buffer-size)))
	  (error
	   ;; Assume no `cygpath' program available.
	   ;; Hack /cygdrive/x/ or /x/ or (obsolete) //x/ to x:/
	   (when (string-match "\\`\\(/cygdrive\\|/\\)?/./" file)
	     (if (match-beginning 1)		; /cygdrive/x/ or //x/ -> /x/
		 (setq file (substring file (match-end 1))))
	     (aset file 0 (aref file 1))	; /x/ -> xx/
	     (aset file 1 ?:))		; xx/ -> x:/
	   file))
      file)))

\f
;;; User options:

;; NB: Group identifiers must be lowercase!

(defgroup woman nil
  "Browse UNIX manual pages `wo (without) man'."
  :tag "WoMan"
  :link '(custom-manual "(woman) Top")
  :link '(emacs-commentary-link :tag "Commentary" "woman.el")
  :group 'help)

(defcustom woman-show-log nil
  "If non-nil then show the *WoMan-Log* buffer if appropriate.
I.e. if any warning messages are written to it.  Default is nil."
  :type 'boolean
  :group 'woman)

(defcustom woman-pre-format-hook nil
  "Hook run by WoMan immediately before formatting a buffer.
Change only via `Customization' or the function `add-hook'."
  :type 'hook
  :group 'woman)

(defcustom woman-post-format-hook nil
  "Hook run by WoMan immediately after formatting a buffer.
Change only via `Customization' or the function `add-hook'."
  :type 'hook
  :group 'woman)

\f
;; Interface options

(defgroup woman-interface nil
  "Interface options for browsing UNIX manual pages `wo (without) man'."
  :tag "WoMan Interface"
  :group 'woman)

(defcustom woman-man.conf-path
  (let ((path '("/usr/lib" "/etc")))
    (cond ((eq system-type 'windows-nt)
	   (mapcar 'woman-Cyg-to-Win path))
	  ((eq system-type 'darwin)
	   (cons "/usr/share/misc" path))
	  (t path)))
  "List of dirs to search and/or files to try for man config file.
A trailing separator (`/' for UNIX etc.) on directories is
optional, and the filename is used if a directory specified is
the first to start with \"man\" and has an extension starting
with \".conf\".  If MANPATH is not set but a config file is found
then it is parsed instead to provide a default value for
`woman-manpath'."
  :type '(repeat string)
  :group 'woman-interface)

(defun woman-parse-man.conf ()
  "Parse if possible configuration file for man command.
Used only if MANPATH is not set or contains null components.
Look in `woman-man.conf-path' and return a value for `woman-manpath'.
Concatenate data from all lines in the config file of the form
  MANPATH  /usr/man
or
  MANDATORY_MANPATH  /usr/man
or
  OPTIONAL_MANPATH  /usr/man
or
  MANPATH_MAP /opt/bin /opt/man"
  ;; Functionality suggested by Charles Curley.
  (let ((path woman-man.conf-path)
	file manpath)
    (while (and
	    path
	    (not (and
		  (file-readable-p (setq file (car path)))
		  ;; If not a file then find the file:
		  (or (not (file-directory-p file))
		      (and
		       (setq file
			     (directory-files file t "\\`man.*\\.conf[a-z]*\\'" t))
		       (file-readable-p (setq file (car file)))))
		  ;; Parse the file -- if no MANPATH data ignore it:
		  (with-temp-buffer
		    (insert-file-contents file)
		    (while (re-search-forward
			    ;; `\(?: ... \)' is a "shy group"
			    "\
^[ \t]*\\(?:\\(?:MANDATORY_\\|OPTIONAL_\\)?MANPATH[ \t]+\\(\\S-+\\)\\|\
MANPATH_MAP[ \t]+\\(\\S-+\\)[ \t]+\\(\\S-+\\)\\)" nil t)
                      (cl-pushnew (if (match-beginning 1)
                                      (match-string 1)
                                    (cons (match-string 2)
                                          (match-string 3)))
                                  manpath :test #'equal))
		    manpath))
		 ))
      (setq path (cdr path)))
    (nreverse manpath)))

;; Autoload so set-locale-environment can operate on it.
;;;###autoload
(defcustom woman-locale nil
  "String specifying a manual page locale, or nil.
If a manual page is available in the specified locale
\(e.g. \"sv_SE.ISO8859-1\"), it will be offered in preference to the
default version.  Normally, `set-locale-environment' sets this at startup."
  :type '(choice string (const nil))
  :group 'woman-interface
  :version "23.1")

;; FIXME Is this a sensible list of alternatives?
(defun woman-expand-locale (locale)
  "Expand a locale into a list suitable for man page lookup.
Expands a locale of the form LANGUAGE_TERRITORY.CHARSET into the list:
LANGUAGE_TERRITORY.CHARSET LANGUAGE_TERRITORY LANGUAGE.CHARSET LANGUAGE.
The TERRITORY and CHARSET portions may be absent."
  (string-match "\\([^._]*\\)\\(_[^.]*\\)?\\(\\..*\\)?" locale)
  (let ((lang (match-string 1 locale))
        (terr (match-string 2 locale))
        (charset (match-string 3 locale)))
    (delq nil (list locale
                    (and charset terr (concat lang terr))
                    (and charset terr (concat lang charset))
                    (if (or charset terr) lang)))))

(defun woman-manpath-add-locales (manpath)
  "Add locale-specific subdirectories to the elements of MANPATH.
MANPATH is a list of the form of `woman-manpath'.  Returns a list
with those locale-specific subdirectories specified by the action
of `woman-expand-locale' on `woman-locale' added, where they exist."
  (if (zerop (length woman-locale))
      manpath
    (let ((subdirs (woman-expand-locale woman-locale))
          lst dir)
      (dolist (elem manpath (nreverse lst))
        (dolist (sub subdirs)
          (when (file-directory-p
                 (setq dir
                       ;; Use f-n-a-d because parse-colon-path does.
                       (file-name-as-directory
                        (expand-file-name sub (substitute-in-file-name
                                               (if (consp elem)
                                                   (cdr elem)
                                                 elem))))))
            (cl-pushnew (if (consp elem)
                            (cons (car elem) dir)
                          dir)
                        lst :test #'equal)))
        ;; Non-locale-specific has lowest precedence.
        (cl-pushnew elem lst :test #'equal)))))

(defcustom woman-manpath
  ;; Locales could also be added in woman-expand-directory-path.
  (or (woman-manpath-add-locales
       (woman-parse-colon-path (getenv "MANPATH")))
      '("/usr/man" "/usr/share/man" "/usr/local/man"))
  "List of DIRECTORY TREES to search for UN*X manual files.
Each element should be the name of a directory that contains
subdirectories of the form `man?', or more precisely subdirectories
selected by the value of `woman-manpath-man-regexp'.  Non-directory
and unreadable files are ignored.

Elements can also be a cons cell indicating a mapping from PATH
to manual trees: if such an element's car is equal to a path
element of the environment variable PATH, the cdr of the cons
cell is included in the directory tree search.

If not set then the environment variable MANPATH is used.  If no such
environment variable is found, the default list is determined by
consulting the man configuration file if found, which is determined by
the user option `woman-man.conf-path'.  An empty substring of MANPATH
denotes the default list.

Any environment variables (names must have the UN*X-style form $NAME,
e.g. $HOME, $EMACSDATA, $emacs_dir) are evaluated first but each
element must evaluate to a SINGLE directory name.  Trailing `/'s are
ignored.  (Specific directories in `woman-path' are also searched.)

Microsoft platforms:
I recommend including drive letters explicitly, e.g.

  (\"C:/Cygwin/usr/man/\" \"C:/Cygwin/usr/local/man\").

The MANPATH environment variable may be set using DOS semi-colon-
separated or UN*X/Cygwin colon-separated syntax (but not mixed)."
  :type '(repeat (choice string (cons string string)))
  :version "23.1"                    ; added woman-manpath-add-locales
  :group 'woman-interface)

(defcustom woman-manpath-man-regexp "[Mm][Aa][Nn]"
  "Regexp to match man directories UNDER `woman-manpath' directories.
These normally have names of the form `man?'.  Its default value is
\"[Mm][Aa][Nn]\", which is case-insensitive mainly for the benefit of
Microsoft platforms.  Its purpose is to avoid `cat?', `.', `..', etc."
  ;; Based on a suggestion by Wei-Xue Shi.
  :type 'regexp
  :group 'woman-interface)

(defcustom woman-path
  (if (eq system-type 'ms-dos) '("$DJDIR/info" "$DJDIR/man/cat[1-9onlp]"))
  "List of SPECIFIC DIRECTORIES to search for UN*X manual files.
For example

  (\"/emacs/etc\").

These directories are searched in addition to the directory trees
specified in `woman-manpath'.  Each element should be a directory
string or nil, which represents the current directory when the path is
expanded and cached.  However, the last component (only) of each
directory string is treated as a regexp \(Emacs, not shell) and the
string is expanded into a list of matching directories.  Non-directory
and unreadable files are ignored.  The default value is nil.

Any environment variables (which must have the UN*X-style form $NAME,
e.g. $HOME, $EMACSDATA, $emacs_dir) are evaluated first but each
element must evaluate to a SINGLE directory name (regexp, see above).
For example

  (\"$EMACSDATA\") [or equivalently (\"$emacs_dir/etc\")].

Trailing `/'s are discarded.  (The directory trees in `woman-manpath'
are also searched.)  On Microsoft platforms I recommend including
drive letters explicitly."
  :type '(repeat (choice string (const nil)))
  :group 'woman-interface)

(defcustom woman-cache-level 2
  "The level of topic caching.
1 - cache only the topic and directory lists
    (the only level before version 0.34 - only for compatibility);
2 - cache also the directories for each topic
    (faster, without using much more memory);
3 - cache also the actual filenames for each topic
    (fastest, but uses twice as much memory).
The default value is currently 2, a good general compromise.
If the `woman' command is slow to find files then try 3, which may be
particularly beneficial with large remote-mounted man directories.
Run the `woman' command with a prefix argument or delete the cache
file `woman-cache-filename' for a change to take effect.
\(Values < 1 behave like 1; values > 3 behave like 3.)"
  :type '(choice (const :tag "Minimal" 1)
		 (const :tag "Default" 2)
		 (const :tag "Maximal" 3))
  :group 'woman-interface)

(defcustom woman-cache-filename nil
  "The full pathname of the WoMan directory and topic cache file.
It is used to save and restore the cache between sessions.  This is
especially useful with remote-mounted man page files!  The default
value of nil suppresses this action.  The `standard' non-nil
filename is \"~/.wmncach.el\".  Remember that a prefix argument forces
the `woman' command to update and re-write the cache."
  :type '(choice (const :tag "None" nil)
		 (const :tag "~/.wmncach.el" "~/.wmncach.el")
		 file)
  :group 'woman-interface)

(defcustom woman-dired-keys t
  "List of `dired' mode keys to define to run WoMan on current file.
E.g. (\"w\" \"W\"), or any non-null atom to automatically define
\"w\" and \"W\" if they are unbound, or nil to do nothing.
Default is t."
  :type '(choice (const :tag "None" nil)
		 (repeat string)
		 (other :tag "Auto" t))
  :group 'woman-interface)

(defcustom woman-imenu-generic-expression
  '((nil "\n\\([A-Z].*\\)" 1) ; SECTION, but not TITLE
    ("*Subsections*" "^   \\([A-Z].*\\)" 1))
  "Imenu support for Sections and Subsections.
An alist with elements of the form (MENU-TITLE REGEXP INDEX) --
see the documentation for `imenu-generic-expression'."
  :type '(alist :key-type (choice :tag "Title" (const nil) string)
                :value-type (group (choice (regexp :tag "Regexp")
                                           function)
                                   integer))
  :group 'woman-interface)

(defcustom woman-imenu nil
  "If non-nil then WoMan adds a Contents menu to the menubar.
It does this by calling `imenu-add-to-menubar'.  Default is nil."
  :type 'boolean
  :group 'woman-interface)

(defcustom woman-imenu-title "CONTENTS"
  "The title to use if WoMan adds a Contents menu to the menubar.
Default is \"CONTENTS\"."
  :type 'string
  :group 'woman-interface)

(defcustom woman-use-topic-at-point-default nil
  ;; `woman-use-topic-at-point' may be let-bound when woman is loaded,
  ;; in which case its global value does not get defined.
  ;; `woman-file-name' sets it to this value if it is unbound.
  "Default value for `woman-use-topic-at-point'."
  :type '(choice (const :tag "Yes" t)
		 (const :tag "No" nil))
  :group 'woman-interface)

(defcustom woman-use-topic-at-point woman-use-topic-at-point-default
  "Control use of the word at point as the default topic.
If non-nil the `woman' command uses the word at point automatically,
without interactive confirmation, if it exists as a topic."
  :type '(choice (const :tag "Yes" t)
		 (const :tag "No" nil))
  :group 'woman-interface)

(defvar woman-file-regexp nil
  "Regexp used to select (possibly compressed) man source files, e.g.
\"\\.\\([0-9lmnt]\\w*\\)\\(\\.\\(g?z\\|bz2\\|xz\\)\\)?\\\\='\".
Built automatically from the customizable user options
`woman-uncompressed-file-regexp' and `woman-file-compression-regexp'.")

(defvar woman-uncompressed-file-regexp)	; for the compiler
(defvar woman-file-compression-regexp)	; for the compiler

(defun set-woman-file-regexp (symbol value)
  "Bind SYMBOL to VALUE and set `woman-file-regexp' as per user customizations.
Used as :set cookie by Customize when customizing the user options
`woman-uncompressed-file-regexp' and `woman-file-compression-regexp'."
  (set-default symbol value)
  (and (boundp 'woman-uncompressed-file-regexp)
       (boundp 'woman-file-compression-regexp)
       (setq woman-file-regexp
	     (concat woman-uncompressed-file-regexp
		     "\\("
		     (substring woman-file-compression-regexp 0 -2)
		     "\\)?\\'"))))

(defcustom woman-uncompressed-file-regexp
  "\\.\\([0-9lmnt]\\w*\\)"		; disallow no extension
  "Do not change this unless you are sure you know what you are doing!
Regexp used to select man source files (ignoring any compression extension).

The SysV standard man pages use two character suffixes, and this is
becoming more common in the GNU world.  For example, the man pages
in the ncurses package include `toe.1m', `form.3x', etc.

Note: an optional compression regexp will be appended, so this regexp
MUST NOT end with any kind of string terminator such as $ or \\\\='."
  :type 'regexp
  :set 'set-woman-file-regexp
  :group 'woman-interface)

(defcustom woman-file-compression-regexp
  "\\.\\(g?z\\|bz2\\|xz\\)\\'"
  "Do not change this unless you are sure you know what you are doing!
Regexp used to match compressed man file extensions for which
decompressors are available and handled by auto-compression mode,
e.g. \"\\\\.\\\\(g?z\\\\|bz2\\\\|xz\\\\)\\\\\\='\" for `gzip', `bzip2', or `xz'.
Should begin with \\. and end with \\\\=' and MUST NOT be optional."
  ;; Should be compatible with car of
  ;; `jka-compr-file-name-handler-entry', but that is unduly
  ;; complicated, includes an inappropriate extension (.tgz) and is
  ;; not loaded by default!
  :version "24.1"                       ; added xz
  :type 'regexp
  :set 'set-woman-file-regexp
  :group 'woman-interface)

(defcustom woman-use-own-frame nil
  "If non-nil then use a dedicated frame for displaying WoMan windows.
Only useful when run on a graphic display such as X or MS-Windows."
  :type 'boolean
  :group 'woman-interface)

\f
;; Formatting options

(defgroup woman-formatting nil
  "Formatting options for browsing UNIX manual pages `wo (without) man'."
  :tag "WoMan Formatting"
  :group 'woman)

(defcustom woman-fill-column 65
  "Right margin for formatted text -- default is 65."
  :type 'integer
  :group 'woman-formatting)

(defcustom woman-fill-frame nil
  ;; Based loosely on a suggestion by Theodore Jump:
  "If non-nil then most of the window width is used."
  :type 'boolean
  :group 'woman-formatting)

(defcustom woman-default-indent 5
  "Default prevailing indent set by -man macros -- default is 5.
Set this variable to 7 to emulate GNU man formatting."
  :type 'integer
  :group 'woman-formatting)

(defcustom woman-bold-headings t
  "If non-nil then embolden section and subsection headings.  Default is t.
Heading emboldening is NOT standard `man' behavior."
  :type 'boolean
  :group 'woman-formatting)

(defcustom woman-ignore t
  "If non-nil then unrecognized requests etc. are ignored.  Default is t.
This gives the standard ?roff behavior.  If nil then they are left in
the buffer, which may aid debugging."
  :type 'boolean
  :group 'woman-formatting)

(defcustom woman-preserve-ascii t
  "If non-nil, preserve ASCII characters in the WoMan buffer.
Otherwise, to save time, some backslashes and spaces may be
represented differently (as the values of the variables
`woman-escaped-escape-char' and `woman-unpadded-space-char'
respectively) so that the buffer content is strictly wrong even though
it should display correctly.  This should be irrelevant unless the
buffer text is searched, copied or saved to a file."
  ;; This option should probably be removed!
  :type 'boolean
  :group 'woman-formatting)

(defcustom woman-emulation 'nroff
  "WoMan emulation, currently either nroff or troff.  Default is nroff.
Troff emulation is experimental and largely untested.
\(Add groff later?)"
  :type '(choice (const nroff) (const troff))
  :group 'woman-formatting)

\f
;; Faces:

(defgroup woman-faces nil
  "Face options for browsing UNIX manual pages `wo (without) man'."
  :tag "WoMan Faces"
  :group 'woman
  :group 'faces)

(defcustom woman-fontify
  (or (display-color-p)
      (display-graphic-p)
      (x-display-color-p))
  "If non-nil then WoMan assumes that face support is available.
It defaults to a non-nil value if the display supports either colors
or different fonts."
  :type 'boolean
  :group 'woman-faces)

(defface woman-italic
  '((t :inherit italic))
  "Face for italic font in man pages."
  :group 'woman-faces)

(defface woman-bold
  '((t :inherit bold))
  "Face for bold font in man pages."
  :group 'woman-faces)

(defface woman-unknown
  '((t :inherit font-lock-warning-face))
  "Face for all unknown fonts in man pages."
  :group 'woman-faces)

(defface woman-addition
  '((t :inherit font-lock-builtin-face))
  "Face for all WoMan additions to man pages."
  :group 'woman-faces)

(defun woman-default-faces ()
  "Set foreground colors of italic and bold faces to their default values."
  (declare (obsolete "customize the woman-* faces instead." "24.4"))
  (interactive)
  (face-spec-set 'woman-italic (face-user-default-spec 'woman-italic))
  (face-spec-set 'woman-bold (face-user-default-spec 'woman-bold)))

(defun woman-monochrome-faces ()
  "Set foreground colors of italic and bold faces to that of the default face.
This is usually either black or white."
  (declare (obsolete "customize the woman-* faces instead." "24.4"))
  (interactive)
  (set-face-foreground 'woman-italic 'unspecified)
  (set-face-foreground 'woman-bold 'unspecified))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Experimental font support, initially only for MS-Windows.
(defconst woman-font-support
  (eq window-system 'w32)		; Support X later!
  "If non-nil then non-ASCII characters and symbol font supported.")

(defun woman-select-symbol-fonts (fonts)
  "Select symbol fonts from a list FONTS of font name strings."
  (let (symbol-fonts)
    ;; With NTEmacs 20.5, the PATTERN option to `x-list-fonts' does
    ;; not seem to work and fonts may be repeated, so ...
    (dolist (font fonts)
      (and (string-match-p "-Symbol-" font)
	   (not (member font symbol-fonts))
	   (setq symbol-fonts (cons font symbol-fonts))))
    symbol-fonts))

(declare-function x-list-fonts "xfaces.c"
		  (pattern &optional face frame maximum width))

(when woman-font-support
  (make-face 'woman-symbol)

  ;; Set the symbol font only if `woman-use-symbol-font' is true, to
  ;; avoid unnecessarily upsetting the line spacing in NTEmacs 20.5!

  (defcustom woman-use-extended-font t
    "If non-nil then may use non-ASCII characters from the default font."
    :type 'boolean
    :group 'woman-faces)

  (defcustom woman-use-symbol-font nil
    "If non-nil then may use the symbol font.
It is off by default, mainly because it may change the line spacing
\(in NTEmacs 20.5)."
    :type 'boolean
    :group 'woman-faces)

  (defconst woman-symbol-font-list
    (or (woman-select-symbol-fonts (x-list-fonts "*" 'default))
	(woman-select-symbol-fonts (x-list-fonts "*")))
    "Symbol font(s), preferably same size as default when WoMan was loaded.")

  (defcustom woman-symbol-font (car woman-symbol-font-list)
    "A string describing the symbol font to use for special characters.
It should be compatible with, and the same size as, the default text font.
Under MS-Windows, the default is
  \"-*-Symbol-normal-r-*-*-*-*-96-96-p-*-ms-symbol\"."
    :type `(choice
	    ,@(mapcar (lambda (x) (list 'const x))
		      woman-symbol-font-list)
	    string)
    :group 'woman-faces)

  )

;; For non windows-nt ...
(defvar woman-use-extended-font nil)
(defvar woman-use-symbol-font nil)
(defvar woman-symbol-font nil)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

\f
;;; Internal variables:

(defconst woman-justify-styles [left right center full]
  "Justify styles for `fill-region-as-paragraph'.")
(defconst woman-adjust-left 0		; == adjust off, noadjust
  "Adjustment indicator `l' -- adjust left margin only.")
(defconst woman-adjust-right 1
  "Adjustment indicator `r' -- adjust right margin only.")
(defconst woman-adjust-center 2
  "Adjustment indicator `c' -- center.")
(defconst woman-adjust-both 3		; default -- adj,both
  "Adjustment indicator `b' or `n' -- adjust both margins.")

(defvar woman-adjust woman-adjust-both
  "Current adjustment number-register value.")
(defvar woman-adjust-previous woman-adjust
  "Previous adjustment number-register value.")
(defvar woman-justify (aref woman-justify-styles woman-adjust)
  "Current justification style for `fill-region-as-paragraph'.")
(defvar woman-justify-previous woman-justify
  "Previous justification style for `fill-region-as-paragraph'.")

(defvar woman-left-margin woman-default-indent
  "Current left margin.")
(defvar woman-prevailing-indent woman-default-indent
  "Current prevailing indent.")
(defvar woman-interparagraph-distance 1
  "Interparagraph distance in lines.
Set by .PD; used by .SH, .SS, .TP, .LP, .PP, .P, .IP, .HP.")
(defvar woman-leave-blank-lines nil
  "Blank lines to leave as vertical space.")
(defconst woman-tab-width 5
  "Default tab width set by -man macros.")
(defvar woman-nofill nil
  "Current fill mode: nil for filling.")
(defvar woman-RS-left-margin nil
  "Left margin stack for nested use of `.RS/.RE'.")
(defvar woman-RS-prevailing-indent nil
  "Prevailing indent stack for nested use of `.RS/.RE'.")
(defvar woman-nospace nil
  "Current no-space mode: nil for normal spacing.
Set by `.ns' request; reset by any output or `.rs' request")
;; Used for message logging
(defvar WoMan-current-file nil)		; bound in woman-really-find-file
(defvar WoMan-Log-header-point-max nil)

(defsubst woman-reset-nospace ()
  "Set `woman-nospace' to nil."
  (setq woman-nospace nil))

(defconst woman-request-regexp "^[.'][ \t]*\\(\\S +\\) *"
  ;; Was "^\\.[ \t]*\\([a-z0-9]+\\) *" but cvs.1 uses a macro named
  ;; "`" and CGI.man uses a macro named "''"!
  ;; CGI.man uses ' as control character in places -- it *should*
  ;; suppress breaks!
  ;; Could end with "\\( +\\|$\\)" instead of " *"
  "Regexp to match a ?roff request plus trailing white space.")

(defvar woman-imenu-done nil
  "Buffer-local: set to true if function `woman-imenu' has been called.")
(make-variable-buffer-local 'woman-imenu-done)

;; From imenu.el -- needed when reformatting a file in its old buffer.
;; The latest buffer index used to update the menu bar menu.
(eval-when-compile
  (require 'imenu))
(make-variable-buffer-local 'imenu--last-menubar-index-alist)

(defvar woman-buffer-alist nil
  "An alist representing WoMan buffers that are already decoded.
Each element is of the form (FILE-NAME . BUFFER-NAME).")

(defvar woman-buffer-number 0
  "Ordinal number of current buffer entry in `woman-buffer-alist'.
The ordinal numbers start from 0.")

(defvar woman-if-conditions-true '(?n ?e ?o)
  "List of one-character built-in condition names that are true.
Should include ?e, ?o (page even/odd) and either ?n (nroff) or ?t (troff).
Default is (?n ?e ?o).  Set via `woman-emulation'.")

\f
;;; Specialized utility functions:

;;; Fast deletion without saving on the kill ring (cf. simple.el):

(defun woman-delete-line (&optional arg)
  "Delete rest of current line; if all blank then delete thru newline.
With a numeric argument ARG, delete that many lines from point.
Negative arguments delete lines backward."
  ;; This is a non-interactive version of kill-line in simple.el that
  ;; deletes instead of killing and assumes kill-whole-line is nil,
  ;; which is essential!
  (delete-region (point)
		 (progn
		   (if arg
		       (forward-line arg)
		     (if (eobp)
			 (signal 'end-of-buffer nil))
		     (if (looking-at "[ \t]*$")
			 (forward-line 1)
		       (end-of-line)))
		 (point))))

(defsubst woman-delete-whole-line ()
  "Delete current line from beginning including eol."
  (beginning-of-line)
  (woman-delete-line 1))

(defsubst woman-delete-following-space ()
  "Delete all spaces and tabs FOLLOWING point (cf. `delete-horizontal-space')."
  ;; cf. delete-horizontal-space in simple.el:
  (delete-region (point) (progn (skip-chars-forward " \t") (point))))

(defsubst woman-delete-match (subexp)
  "Delete subexpression SUBEXP of buffer text matched by last search."
  (delete-region (match-beginning subexp) (match-end subexp)))

;; delete-char does not kill by default
;; delete-backward-char does not kill by default
;; delete-horizontal-space does not kill
;; delete-blank-lines does not kill

\f
;;; File handling:

(defvar woman-expanded-directory-path nil
  "Expanded directory list cache.  Resetting to nil forces update.")

(defvar woman-topic-all-completions nil
  "Expanded topic alist cache.  Resetting to nil forces update.")

;;;###autoload
(defun woman (&optional topic re-cache)
  "Browse UN*X man page for TOPIC (Without using external Man program).
The major browsing mode used is essentially the standard Man mode.
Choose the filename for the man page using completion, based on the
topic selected from the directories specified in `woman-manpath' and
`woman-path'.  The directory expansions and topics are cached for
speed.  With a prefix argument, force the caches to be
updated (e.g. to re-interpret the current directory).

Used non-interactively, arguments are optional: if given then TOPIC
should be a topic string and non-nil RE-CACHE forces re-caching."
  (interactive (list nil current-prefix-arg))
  ;; The following test is for non-interactive calls via gnudoit etc.
  (if (or (not (stringp topic)) (string-match-p "\\S " topic))
      (let ((file-name (woman-file-name topic re-cache)))
	(if file-name
	    (woman-find-file file-name)
	  (message
	   "WoMan Error: No matching manual files found in search path")
	  (ding)))
    (message "WoMan Error: No topic specified in non-interactive call")
    (ding)))

;; Allow WoMan to be called via the standard Help menu:
(define-key-after menu-bar-manuals-menu [woman]
  '(menu-item "Read Man Page (WoMan)..." woman
	:help "Man-page documentation Without Man") t)

(defvar woman-cached-data nil
  "A list of cached data used to determine cache validity.
Set from the cache by `woman-read-directory-cache'.")

(defun woman-cached-data ()
  "Generate a list of data used to determine cache validity.
Called both to generate and to check the cache!"
  ;; Must use substituted paths because values of env vars may change!
  (list woman-cache-level
	(let (lst path)
	  (dolist (dir woman-manpath (nreverse lst))
	    (when (consp dir)
	      (unless path
		(setq path
		      (split-string (getenv "PATH") path-separator t)))
	      (setq dir (and (member (car dir) path) (cdr dir))))
	    (when dir
              (cl-pushnew (substitute-in-file-name dir) lst :test #'equal))))
	(mapcar 'substitute-in-file-name woman-path)))

(defun woman-read-directory-cache ()
  "Load the directory and topic cache.
It is loaded from the file named by the variable `woman-cache-filename'.
Return t if the file exists, nil otherwise."
  (and
   woman-cache-filename
   (load woman-cache-filename t nil t)	; file exists
   (equal woman-cached-data (woman-cached-data)))) ; cache valid

(defun woman-write-directory-cache ()
  "Save the directory and topic cache.
It is saved to the file named by the variable `woman-cache-filename'."
  (if woman-cache-filename
      (with-current-buffer (generate-new-buffer "WoMan tmp buffer")
	;; Make a temporary buffer; name starting with space "hides" it.
	(let ((standard-output (current-buffer))
	      (backup-inhibited t))
	  ;; (switch-to-buffer standard-output t) ; only for debugging
	  (buffer-disable-undo standard-output)
	  (princ
	   ";;; WoMan directory and topic cache -- generated automatically\n")
	  (print
	   ;; For data validity check:
	   `(setq woman-cached-data ',(woman-cached-data)))
	  (print
	   `(setq woman-expanded-directory-path
		  ',woman-expanded-directory-path))
	  (print
	   `(setq woman-topic-all-completions
		  ',woman-topic-all-completions))
	  (write-file woman-cache-filename) ; write CURRENT buffer
	  (kill-buffer standard-output)
	  ))))

(defvaralias 'woman-topic-history 'Man-topic-history)
(defvar woman-file-history nil "File-name read history.")

(defun woman-file-name (topic &optional re-cache)
  "Get the name of the UN*X man-page file describing a chosen TOPIC.
When `woman' is called interactively, the word at point may be
automatically used as the topic, if the value of the user option
`woman-use-topic-at-point' is non-nil.  Return nil if no file can
be found.  Optional argument RE-CACHE, if non-nil, forces the
cache to be re-read."
  ;; Handle the caching of the directory and topic lists:
  (unless (and (not re-cache)
	       (or
		(and woman-expanded-directory-path woman-topic-all-completions)
		(woman-read-directory-cache)))
    (message "Building list of manual directory expansions...")
    (setq woman-expanded-directory-path
	  (woman-expand-directory-path woman-manpath woman-path))
    (message "Building completion list of all manual topics...")
    (setq woman-topic-all-completions
	  (woman-topic-all-completions woman-expanded-directory-path))
    (woman-write-directory-cache))
  ;; There is a problem in that I want to offer case-insensitive
  ;; completions, but to return only a case-sensitive match.  This
  ;; does not seem to work properly by default, so I re-do the
  ;; completion if necessary.
  (let (files)
    (or (stringp topic)
	(and (if (boundp 'woman-use-topic-at-point)
		 woman-use-topic-at-point
	       ;; Was let-bound when file loaded, so ...
	       (setq woman-use-topic-at-point woman-use-topic-at-point-default))
	     (setq topic (or (current-word t) "")) ; only within or adjacent to word
	     (test-completion topic woman-topic-all-completions))
	(setq topic
	      (let* ((word-at-point (current-word))
		     (default
		       (when (and word-at-point
				  (test-completion
				   word-at-point woman-topic-all-completions))
			 word-at-point)))
		(completing-read (format-prompt "Manual entry" default)
		                 woman-topic-all-completions nil 1
		                 nil
		                 'woman-topic-history
		                 default))))
    ;; Note that completing-read always returns a string.
    (unless (= (length topic) 0)
      (cond
       ((setq files (woman-file-name-all-completions topic)))
       ;; Complete topic more carefully, i.e. use the completion
       ;; rather than the string entered by the user:
       ((setq files (all-completions topic woman-topic-all-completions))
	(while (/= (length topic) (length (car files)))
	  (setq files (cdr files)))
	(setq files (woman-file-name-all-completions (car files)))))
      (cond
       ((null files) nil)		; no file found for topic.
       ((null (cdr files)) (car (car files))) ; only 1 file for topic.
       (t
	;; Multiple files for topic, so must select 1.
	;; Run the command `minibuffer-complete' in order to automatically
	;; complete the minibuffer contents as far as possible.
        (minibuffer-with-setup-hook
            (lambda () (let ((this-command this-command)) (minibuffer-complete)))
          (completing-read "Manual file: " files nil 1
                           (try-completion "" files) 'woman-file-history)))))))

(defun woman-select (predicate list)
  "Select unique elements for which PREDICATE is true in LIST.
\(Note that this function changes the value of LIST.)"
  ;; Intended to be fast by avoiding recursion and list copying.
  (while (and list
	      (or
	       (member (car list) (cdr list))
	       (not (funcall predicate (car list)))))
    (setq list (cdr list)))
  (if list
      (let ((newlist list) cdr_list)
	(while (setq cdr_list (cdr list))
	  (if (and
	       (not (member (car cdr_list) (cdr cdr_list)))
	       (funcall predicate (car cdr_list)))
	      (setq list cdr_list)
	    (setcdr list (cdr cdr_list))))
	newlist)))

(defun woman-file-readable-p (dir)
  "Return t if DIR is readable, otherwise log a warning."
  (or (file-readable-p dir)
      (WoMan-warn "Ignoring unreadable `manpath' directory tree `%s'!" dir)))

(defun woman-directory-files (head dir)
  "Return a sorted list of files in directory HEAD matching regexp in DIR.
Value is a sorted list of the absolute pathnames of all the files in
directory HEAD, or the current directory if HEAD is nil, that match the
regexp that is the final component of DIR.  Log a warning if list is empty."
  (or (directory-files
       (or head (directory-file-name default-directory)) ; was "."
       t
       (file-name-nondirectory dir))
      (WoMan-warn "No directories match `woman-path' entry `%s'!" dir)))

(defun woman-file-accessible-directory-p (dir)
  "Return t if DIR is accessible, otherwise log a warning."
  (or (file-accessible-directory-p dir)
      (WoMan-warn "Ignoring inaccessible `man-page' directory `%s'!" dir)))

(defun woman-expand-directory-path (path-dirs path-regexps)
  "Expand the manual directories in PATH-DIRS and PATH-REGEXPS.
PATH-DIRS should be a list of general manual directories (like
`woman-manpath'), while PATH-REGEXPS should be a list of specific
manual directory regexps (like `woman-path').
Ignore any paths that are unreadable or not directories."
  ;; Allow each path to be a single string or a list of strings:
  (if (not (listp path-dirs)) (setq path-dirs (list path-dirs)))
  (if (not (listp path-regexps)) (setq path-regexps (list path-regexps)))
  (let (head dirs path)
    (dolist (dir path-dirs)
      (when (consp dir)
	(unless path
	  (setq path (split-string (getenv "PATH") path-separator t)))
	(setq dir (and (member (car dir) path)
		       (cdr dir))))
      (if (and dir (woman-file-readable-p dir))
	  ;; NB: `parse-colon-path' creates null elements for
	  ;; redundant (semi-)colons and trailing `/'s!
	  ;; If does not actually matter here if dir ends with `/'.
	  ;; Need regexp "man" here to avoid "cat?", `.', `..', etc.
	  (setq dir (woman-canonicalize-dir dir)
		dirs (nconc dirs (directory-files
				  dir t woman-manpath-man-regexp)))))
    (dolist (dir path-regexps)
      (if (or (null dir)
	      (null (setq dir (woman-canonicalize-dir dir)
			  head (file-name-directory dir)))
	      (woman-file-readable-p head))
	  (setq dirs
		(if dir
		    (nconc dirs (woman-directory-files head dir))
		  (cons (directory-file-name default-directory) dirs))
		;; was "." -- at head of list for later filtering
		)))
    (woman-select 'woman-file-accessible-directory-p dirs)))

(defun woman-canonicalize-dir (dir)
  "Canonicalize the directory name DIR.
Any UN*X-style environment variables are evaluated first."
  (setq dir (expand-file-name (substitute-in-file-name dir)))
  ;; A path that ends with / matches all directories in it,
  ;; including `.' and `..', so remove any trailing / !!!
  (if (string= (substring dir -1) "/")
      (setq dir (substring dir 0 -1)))
  (if (memq system-type '(windows-nt ms-dos cygwin)) ; what else?
      ;; Match capitalization used by `file-name-directory':
      (setq dir (concat (file-name-directory dir)
			(file-name-nondirectory dir))))
  dir)

(defsubst woman-not-member (dir path)
  "Return t if DIR is not a member of the list PATH, nil otherwise.
If DIR is `.' it is first replaced by the current directory."
  (not (member dir path)))

(defun woman-topic-all-completions (path)
  "Return an alist of the man files in all man directories in the list PATH.
The cdr of each alist element is the path-index / filename."
  ;; Support 3 levels of caching: each element of the alist `files'
  ;; will be a list of the first `woman-cache-level' elements of the
  ;; following list: (topic path-index filename).  This alist `files'
  ;; is re-processed by `woman-topic-all-completions-merge'.
  (let (dir files (path-index 0))	; indexing starts at zero
    (while path
      (setq dir (pop path))
      (if (woman-not-member dir path)	; use each directory only once!
	  (push (woman-topic-all-completions-1 dir path-index)
		files))
      (setq path-index (1+ path-index)))
    ;; Uniquify topics:
    ;; Concatenate all lists with a single nconc call to
    ;; avoid retraversing the first lists repeatedly  -- dak
    (woman-topic-all-completions-merge
     (apply #'nconc files))))

(defun woman-topic-all-completions-1 (dir path-index)
  "Return an alist of the man topics in directory DIR with index PATH-INDEX.
A topic is a filename sans type-related extensions.
Support 3 levels of caching: each element of the alist will be a list
of the first `woman-cache-level' elements from the following list:
\(topic path-index filename)."
  ;; This function used to check that each file in the directory was
  ;; not itself a directory, but this is very slow and should be
  ;; unnecessary.  So let us assume that `woman-file-regexp' will
  ;; filter out any directories, which probably should not be there
  ;; anyway, i.e. it is a user error!
  ;;
  ;; Don't sort files: we do that when merging, anyway.  -- dak
  (let (newlst (lst (directory-files dir nil woman-file-regexp t))
	       ;; Make an explicit regexp for stripping extension and
	       ;; compression extension: file-name-sans-extension is a
	       ;; far too costly function.  -- dak
	       (ext (format "\\(\\.[^.\\/]*\\)?\\(%s\\)?\\'"
			    woman-file-compression-regexp)))
    ;; Use a loop instead of mapcar in order to avoid the speed
    ;; penalty of binding function arguments.  -- dak
      (dolist (file lst newlst)
	(push
	 (cons
	  (if (string-match ext file)
	      (substring file 0 (match-beginning 0))
	    file)
	  (and (> woman-cache-level 1)
	       (cons
		path-index
		(and (> woman-cache-level 2)
		     (list file)))))
	 newlst))))

(defun woman-topic-all-completions-merge (alist)
  "Merge the alist ALIST so that the keys are unique.
Also make each path-info component into a list.
\(Note that this function changes the value of ALIST.)"
  ;; Replaces unreadably "optimized" O(n^2) implementation.
  ;; Instead we use sorting to merge stuff efficiently.  -- dak
  (let (newalist)
    ;; Sort list into reverse order
    (setq alist (sort alist (lambda(x y) (string< (car y) (car x)))))
    ;; merge duplicate keys.
    (if (> woman-cache-level 1)
	(dolist (elt alist)
	  (if (equal (car elt) (caar newalist))
	      (unless (member (cdr elt) (cdar newalist))
		(setcdr (car newalist) (cons (cdr elt)
					     (cdar newalist))))
	    (setcdr elt (list (cdr elt)))
	    (push elt newalist)))
      ;; woman-cache-level = 1 => elements are single-element lists ...
      (dolist (elt alist)
	(unless (equal (car elt) (caar newalist))
	  (push elt newalist))))
    newalist))

(defun woman-file-name-all-completions (topic)
  "Return an alist of the files in all man directories that match TOPIC."
  ;; Support 3 levels of caching: each element of
  ;; woman-topic-all-completions is a list of one of the forms:
  ;;   (topic)
  ;;   (topic (path-index) (path-index) ... )
  ;;   (topic (path-index filename) (path-index filename) ... )
  ;; where there are no duplicates in the value lists.
  ;; Topic must match first `word' of filename, so ...
  (let ((topic-regexp
	 (concat
	  "\\`" (regexp-quote topic)	; first `word'
	  "\\(\\..+\\)*"		; optional subsequent `words'
	  woman-file-regexp))		; extension
	(topics woman-topic-all-completions)
	(path woman-expanded-directory-path)
	dir files)
    (if (cdr (car topics))
	;; Use cached path-info to locate files for each topic:
	(let ((path-info (cdr (assoc topic topics)))
	      filename)
	  (dolist (elt path-info)
	    (setq dir (nth (car elt) path)
		  filename (car (cdr elt))
		  files (nconc files
			       ;; Find the actual file name:
			       (if filename
				   (list (concat dir "/" filename))
				 (directory-files dir t topic-regexp)
				 )))))
      ;; Search path for the files for each topic:
      (while path
	(setq dir (car path)
	      path (cdr path))
	(if (woman-not-member dir path)	; use each directory only once!
	    (setq files (nconc files
			       (directory-files dir t topic-regexp))))))
    (mapcar 'list files)))

\f
;;; dired support

(defun woman-dired-define-key (key)
  "Bind the argument KEY to the command `woman-dired-find-file'."
  (define-key dired-mode-map key 'woman-dired-find-file))

(defsubst woman-dired-define-key-maybe (key)
  "If KEY is undefined in Dired, bind it to command `woman-dired-find-file'."
  (if (or (eq (lookup-key dired-mode-map key) 'undefined)
	  (null (lookup-key dired-mode-map key)))
      (woman-dired-define-key key)))

(defun woman-dired-define-keys ()
  "Define dired keys to run WoMan according to `woman-dired-keys'."
  (if woman-dired-keys
      (if (listp woman-dired-keys)
	  (mapc 'woman-dired-define-key woman-dired-keys)
	(woman-dired-define-key-maybe "w")
	(woman-dired-define-key-maybe "W")))
  (define-key-after (lookup-key dired-mode-map [menu-bar immediate])
    [woman] '("Read Man Page (WoMan)" . woman-dired-find-file) 'view))

(if (featurep 'dired)
    (woman-dired-define-keys)
  (add-hook 'dired-mode-hook 'woman-dired-define-keys))

(declare-function dired-get-filename "dired"
                  (&optional localp no-error-if-not-filep))

;;;###autoload
(defun woman-dired-find-file ()
  "In dired, run the WoMan man-page browser on this file."
  (interactive)
  (woman-find-file (dired-get-filename)))


;;; tar-mode support

(defvar global-font-lock-mode)  ; defined in font-core.el

(defun woman-tar-extract-file ()
  "In tar mode, run the WoMan man-page browser on this file."
  (interactive)
  (or (eq major-mode 'tar-mode)
      (error "`woman-tar-extract-file' can be used only in `tar-mode'"))
  (buffer-disable-undo)
  (let (global-font-lock-mode)
    (funcall (symbol-function 'tar-extract)) ; defined in tar-mode
    (let ((WoMan-current-file buffer-file-name)) ; used for message logging
      (rename-buffer
       (woman-make-bufname (file-name-nondirectory buffer-file-name)))
      (woman-process-buffer)
      (goto-char (point-min)))))

(defvar woman-last-file-name nil
  "The full pathname of the last file formatted by WoMan.")

(defun woman-reformat-last-file ()
  "Reformat last file, e.g. after changing fill column."
  (interactive)
  (if woman-last-file-name
      (woman-find-file woman-last-file-name t)
    (call-interactively 'woman-find-file)))

;;;###autoload
(defun woman-find-file (file-name &optional reformat)
  "Find, decode and browse a specific UN*X man-page source file FILE-NAME.
Use existing buffer if possible; reformat only if prefix arg given.
When called interactively, optional argument REFORMAT forces reformatting
of an existing WoMan buffer formatted earlier.
No external programs are used, except that `gunzip' will be used to
decompress the file if appropriate.  See the documentation for the
`woman' command for further details."
  (interactive "fBrowse UN*X manual file: \nP")
  (setq woman-last-file-name
	(setq file-name (expand-file-name file-name)))	; to canonicalize
  (let ((alist-tail woman-buffer-alist) exists)
    (setq woman-buffer-number 0)
    (while (and alist-tail (not (string= file-name (car (car alist-tail)))))
      (setq alist-tail (cdr alist-tail)
	    woman-buffer-number (1+ woman-buffer-number)))
    (or (and (setq exists
		   (and alist-tail (WoMan-find-buffer))) ; buffer exists
	     (not reformat))
	;; Format new buffer or reformat current buffer:
	(let* ((bufname (file-name-nondirectory file-name))
	       (case-fold-search t)
	       (compressed
		(and (string-match-p woman-file-compression-regexp bufname) t)))
	  (if compressed
	      (setq bufname (file-name-sans-extension bufname)))
	  (setq bufname (if exists
			    (buffer-name)
			  (woman-make-bufname bufname)))
	  (woman-really-find-file file-name compressed bufname)
	  (or exists
	      (setq woman-buffer-alist
		    (cons (cons file-name bufname) woman-buffer-alist)
		    woman-buffer-number 0)))))
  (Man-build-section-list)
  (Man-build-references-alist)
  (goto-char (point-min)))

(defun woman-make-bufname (bufname)
  "Create an unambiguous buffer name from BUFNAME."
  ;; See Bug#5038.  Any compression extension has already been removed.
  ;; Go from eg "host.conf.5" to "5 host.conf".
  (let ((dot (string-match "\\.[^.]*\\'" bufname)))
    (if dot (setq bufname (concat
			   (substring bufname (1+ dot)) " "
			   (substring bufname 0 dot))))
    (generate-new-buffer-name		; ensure uniqueness
     (concat "*WoMan " bufname "*"))))

(defvar woman-frame nil
  "Dedicated frame used for displaying WoMan windows.")

(defun woman-really-find-file (filename compressed bufname)
  "Find, decompress, and decode a UN*X man page FILENAME.
If COMPRESSED is non-nil, turn on auto-compression mode to decompress
the file if necessary.  Set buffer name BUFNAME and major mode.
Do not call directly!"
  (let ((WoMan-current-file filename))	; used for message logging
    (if woman-use-own-frame
	(select-frame
	 (or (and (frame-live-p woman-frame) woman-frame)
	     (setq woman-frame (make-frame)))))
    (set-buffer (get-buffer-create bufname))
    (condition-case nil
        (pop-to-buffer-same-window (current-buffer))
      (error (pop-to-buffer (current-buffer))))
    (buffer-disable-undo)
    (setq buffer-read-only nil)
    (erase-buffer)			; NEEDED for reformat
    (woman-insert-file-contents filename compressed)
    ;; Set buffer's default directory to that of the file.
    (setq default-directory (file-name-directory filename))
    (setq-local backup-inhibited t)
    (set-visited-file-name "")
    (woman-process-buffer)))

(defun woman-process-buffer ()
  "The second half of `woman-really-find-file'!"
  (interactive)
  ;; Check (crudely) that this really is likely to be in UN*X
  ;; man-page source format, assuming we are at point-min:
  (goto-char (point-min))
  (if (re-search-forward "^[.']" 1000 t)
      (woman-decode-buffer)
    (message
     "File appears to be pre-formatted -- using source file may be better.")
    (woman-man-buffer))
  (woman-mode))

(defun woman-man-buffer ()
  "Post-process an nroff-preformatted man buffer."
  ;; Kill all leading whitespace:
  (if (looking-at "\\s-+") (woman-delete-match 0))
  ;; Delete all page footer/header pairs:
  (re-search-forward ".*")		; match header
  ;; Footer conventionally has page number at right, so ...
  (let ((regex (concat
		"^.*[0-9]\n\\s-*"	; footer and following blank lines
		(regexp-quote (match-string 0))	; header
		"\\s-*\n")))		; following blank lines
    (while (re-search-forward regex nil 1) ; finish at eob
      (woman-delete-match 0)))
  ;; Delete last text line (footer) and all following blank lines:
  (re-search-backward "\\S-")
  (beginning-of-line)
  (if (looking-at ".*[0-9]$")
      (delete-region (point) (point-max)))

  ;; Squeeze multiple blank lines:
  (goto-char (point-min))
  (while (re-search-forward "^[ \t]*\n\\([ \t]*\n\\)+" nil t)
    (replace-match "\n" t t))

  ;; CJK characters are underlined by double-sized "__".
  ;; (Code lifted from man.el, with trivial changes.)
  (if (< (buffer-size) (position-bytes (point-max)))
      ;; Multibyte characters exist.
      (progn
	(goto-char (point-min))
	(while (search-forward "__\b\b" nil t)
	  (backward-delete-char 4)
	  (woman-set-face (point) (1+ (point)) 'woman-italic))
	(goto-char (point-min))
	(while (search-forward "\b\b__" nil t)
	  (backward-delete-char 4)
	  (woman-set-face (1- (point)) (point) 'woman-italic))))

  ;; Interpret overprinting to indicate bold face:
  (goto-char (point-min))
  (while (re-search-forward "\\(.\\)\\(\\(\^H+\\1\\)+\\)" nil t)
    (woman-delete-match 2)
    (woman-set-face (1- (point)) (point) 'woman-bold))

  ;; Interpret underlining to indicate italic face:
  ;; (Must be AFTER emboldening to interpret bold _ correctly!)
  (goto-char (point-min))
  (while (search-forward "_\^H" nil t)
    (delete-char -2)
    (woman-set-face (point) (1+ (point)) 'woman-italic))

  ;; Leave any other uninterpreted ^H's in the buffer for now!  (They
  ;; might indicate composite special characters, which could be
  ;; interpreted if I knew what to expect.)

  ;; Optionally embolden section and subsection headings
  ;; (cf. `woman-imenu-generic-expression'):
  (cond
   (woman-bold-headings
    (goto-char (point-min))
    (forward-line)
    (while (re-search-forward "^\\(   \\)?\\([A-Z].*\\)" nil t)
      (woman-set-face (match-beginning 2) (match-end 2) 'woman-bold)))))

(defun woman-insert-file-contents (filename compressed)
  "Insert file FILENAME into the current buffer.
If COMPRESSED is t, or is non-nil and the filename implies compression,
then turn on auto-compression mode to decompress the file.
Leave point at end of new text.  Return length of inserted text."
  ;; Leaves point at end of inserted text in GNU Emacs 20.3, but at
  ;; start in 19.34!
  (save-excursion
    (let ((case-fold-search t))
      ;; Cooperate with auto-compression mode:
      (if (and compressed
	       (or (eq compressed t)
		   (string-match-p woman-file-compression-regexp filename))
	       ;; (not auto-compression-mode)
	       (not (rassq 'jka-compr-handler file-name-handler-alist)) )
	  ;; (error "Compressed file requires Auto File Decompression turned on")
	  (auto-compression-mode 1))
      (nth 1
	   (condition-case ()
	       (insert-file-contents filename nil)
	     (file-error
	      ;; Run find-file-not-found-functions until one returns non-nil.
	      ;; (run-hook-with-args-until-success 'find-file-not-found-functions)
	      (insert "\n***** File " filename " not found! *****\n\n")))))))

\f
;;; Major mode (Man) interface:

(defvar woman-mode-map
  (let ((map (make-sparse-keymap)))
    (set-keymap-parent map Man-mode-map)

    (define-key map "R" 'woman-reformat-last-file)
    (define-key map "w" 'woman)
    (define-key map "\en" 'WoMan-next-manpage)
    (define-key map "\ep" 'WoMan-previous-manpage)
    (define-key map [M-mouse-2] 'woman-follow-word)

    ;; We don't need to call `man' when we are in `woman-mode'.
    (define-key map [remap man] 'woman)
    (define-key map [remap man-follow] 'woman-follow)
    map)
  "Keymap for `woman-mode'.")

(defun woman-follow (topic)
  "Get a Un*x manual page of the item under point and put it in a buffer."
  (interactive (list (Man-default-man-entry)))
  (if (or (not topic)
	  (string= topic ""))
      (error "No item under point")
    (woman (if (string-match Man-reference-regexp topic)
	       (substring topic 0 (match-end 1))
	     topic))))

(defun woman-follow-word (event)
  "Run WoMan with word under mouse as topic.
Argument EVENT is the invoking mouse event."
  (interactive "e")			; mouse event
  (goto-char (posn-point (event-start event)))
  (woman (or (current-word t) "")))

;; WoMan menu bar and pop-up menu:
(easy-menu-define
  woman-menu				; (SYMBOL MAPS DOC MENU)
  ;; That comment was moved after the symbol `woman-menu' to make
  ;; find-function-search-for-symbol work. -- rost
 woman-mode-map
 "WoMan Menu"
 `("WoMan"
   ["WoMan..." woman t]			; [NAME CALLBACK ENABLE]
   "--"
   ["Next Section" Man-next-section t]
   ["Previous Section" Man-previous-section t]
   ["Goto Section..." Man-goto-section t]
   ["Goto See-Also Section" Man-goto-see-also-section t]
   ["Follow Reference..." Man-follow-manual-reference t]
   "--"
   ["Previous WoMan Buffer" WoMan-previous-manpage t]
   ["Next WoMan Buffer" WoMan-next-manpage t]
   ["Bury WoMan Buffer" Man-quit t]
   ["Kill WoMan Buffer" Man-kill t]
   "--"
   ;; ["Toggle Fill Frame Width" woman-toggle-fill-frame t]
   ["Use Full Frame Width" woman-toggle-fill-frame
    :active t :style toggle :selected woman-fill-frame]
   ["Reformat Last Man Page" woman-reformat-last-file t]
   ["Make Contents Menu" (woman-imenu t) (not woman-imenu-done)]
   "--"
   ["Describe (Wo)Man Mode" describe-mode t]
   ["Mini Help" woman-mini-help t]
   ,@(if (fboundp 'customize-group)
	 '(["Customize..." (customize-group 'woman) t]))
   "--"
   ("Advanced"
    ["View Source" (view-file woman-last-file-name) woman-last-file-name]
    ["Show Log" (switch-to-buffer-other-window "*WoMan-Log*" t) t]
    ["Extended Font" woman-toggle-use-extended-font
     :included woman-font-support
     :active t :style toggle :selected woman-use-extended-font]
    ["Symbol Font" woman-toggle-use-symbol-font
     :included woman-font-support
     :active t :style toggle :selected woman-use-symbol-font]
    ["Font Map" woman-display-extended-fonts
     :included woman-font-support
     :active woman-use-symbol-font]
   "--"
   "Emulation"
   ["nroff" (woman-reset-emulation 'nroff)
    :active t :style radio :selected (eq woman-emulation 'nroff)]
   ["troff" (woman-reset-emulation 'troff)
    :active t :style radio :selected (eq woman-emulation 'troff)]
   )
   ))

(defun woman-toggle-use-extended-font ()
  "Toggle `woman-use-extended-font' and reformat, for menu use."
  (interactive)
  (setq woman-use-extended-font (not woman-use-extended-font))
  (woman-reformat-last-file))

(defun woman-toggle-use-symbol-font ()
  "Toggle `woman-use-symbol-font' and reformat, for menu use."
  (interactive)
  (setq woman-use-symbol-font (not woman-use-symbol-font))
  (woman-reformat-last-file))

(defun woman-reset-emulation (value)
  "Reset `woman-emulation' to VALUE and reformat, for menu use."
  (interactive)
  (setq woman-emulation value)
  (woman-reformat-last-file))

(defvar bookmark-make-record-function)

(define-derived-mode woman-mode special-mode "WoMan"
  "Turn on (most of) Man mode to browse a buffer formatted by WoMan.
WoMan is an ELisp emulation of much of the functionality of the Emacs
`man' command running the standard UN*X man and ?roff programs.
WoMan author: F.J.Wright@Maths.QMW.ac.uk
See `Man-mode' for additional details.
\\{woman-mode-map}"
  (let ((Man-build-page-list (symbol-function 'Man-build-page-list))
	(Man-strip-page-headers (symbol-function 'Man-strip-page-headers))
	(Man-unindent (symbol-function 'Man-unindent))
	(Man-goto-page (symbol-function 'Man-goto-page)))
    ;; Prevent inappropriate operations:
    (fset 'Man-build-page-list 'ignore)
    (fset 'Man-strip-page-headers 'ignore)
    (fset 'Man-unindent 'ignore)
    (fset 'Man-goto-page 'ignore)
    (unwind-protect
	(delay-mode-hooks (Man-mode))
      ;; Restore the status quo:
      (fset 'Man-build-page-list Man-build-page-list)
      (fset 'Man-strip-page-headers Man-strip-page-headers)
      (fset 'Man-unindent Man-unindent)
      (fset 'Man-goto-page Man-goto-page)
      (setq tab-width woman-tab-width)))
  (setq major-mode 'woman-mode
	mode-name "WoMan")
  ;; Don't show page numbers like Man-mode does.  (Online documents do
  ;; not have pages)
  (kill-local-variable 'mode-line-buffer-identification)
  (use-local-map woman-mode-map)
  ;; Imenu support:
  (setq imenu-generic-expression woman-imenu-generic-expression)
  (setq-local imenu-space-replacement " ")
  ;; Bookmark support.
  (setq-local bookmark-make-record-function 'woman-bookmark-make-record)
  ;; For reformat ...
  ;; necessary when reformatting a file in its old buffer:
  (setq imenu--last-menubar-index-alist nil)
  ;; necessary to avoid re-installing the same imenu:
  (setq woman-imenu-done nil)
  (if woman-imenu (woman-imenu))
  (let ((inhibit-read-only t))
    (Man-highlight-references 'WoMan-xref-man-page)))

(declare-function imenu-add-to-menubar "imenu")

(defun woman-imenu (&optional redraw)
  "Add a \"Contents\" menu to the menubar.
Optional argument REDRAW, if non-nil, forces mode line to be updated."
  (interactive)
  (if woman-imenu-done
      ;; This is PRIMARILY to avoid a bug in imenu-add-to-menubar that
      ;; causes it to corrupt the menu bar if it is run more than once
      ;; in the same buffer.
      ()
    (setq woman-imenu-done t)
    (imenu-add-to-menubar woman-imenu-title)
    (if redraw (force-mode-line-update))))

(defun woman-toggle-fill-frame ()
  "Toggle formatting to fill (most of) the width of the current frame."
  (interactive)
  (setq woman-fill-frame (not woman-fill-frame))
  (message "Woman fill column set to %s."
	   (if woman-fill-frame "frame width" woman-fill-column)))

(declare-function apropos-print "apropos"
                  (do-keys spacing &optional text nosubst))

(defun woman-mini-help ()
  "Display WoMan commands and user options in an `apropos' buffer."
  ;; Based on apropos-command in apropos.el
  (interactive)
  (require 'apropos)
  (let ((message
	 (let ((standard-output (get-buffer-create "*Apropos*")))
	   (help-print-return-message 'identity))))
    (setq apropos-accumulator
	  (apropos-internal "woman"
			    (lambda (symbol)
			      (and
			       (or (commandp symbol)
				   (custom-variable-p symbol))
			       (not (get symbol 'apropos-inhibit))))))
    ;; Find documentation strings:
    (let ((p apropos-accumulator)
	  doc symbol)
      (while p
	(setcar p (list			; must have 3 elements:
		   (setq symbol (car p)) ; 1. name
		   (if (functionp symbol) ; 2. command doc
		       (if (setq doc (documentation symbol t))
			   (substring doc 0 (string-match "\n" doc))
			 "(not documented)"))
		   (if (custom-variable-p symbol)	; 3. variable doc
		       (if (setq doc (documentation-property
				      symbol 'variable-documentation t))
			   (substring doc 0 (string-match "\n" doc))))))
	(setq p (cdr p))))
    ;; Output the result:
    (and (apropos-print t nil)
	 message
	 (message "%s" message))))


(defun WoMan-getpage-in-background (topic)
  "Use TOPIC to start WoMan from `Man-follow-manual-reference'."
  ;; topic is a string, generally of the form "section topic"
  (let ((s (string-match " " topic)))
    (if s (setq topic (substring topic (1+ s))))
    (woman topic)))

(defvar WoMan-Man-start-time nil
  "Used to record formatting time used by the `man' command.")

;; Both advices are disabled because "a file in Emacs should not put
;; advice on a function in Emacs" (see Info node "(elisp)Advising
;; Functions").  Counting the formatting time is useful for
;; developing, but less applicable for daily use.  The advice for
;; `Man-getpage-in-background' can be discarded, because the
;; key-binding in `woman-mode-map' has been remapped to call `woman'
;; but `man'.  Michael Albinus <michael.albinus@gmx.de>

;; (defadvice Man-getpage-in-background
;;   (around Man-getpage-in-background-advice (topic) activate)
;;   "Use WoMan unless invoked outside a WoMan buffer or invoked explicitly.
;; Otherwise use Man and record start of formatting time."
;;   (if (and (eq major-mode 'woman-mode)
;; 	   (not (eq (caar command-history) 'man)))
;;       (WoMan-getpage-in-background topic)
;;     ;; Initiates man processing
;;     (setq WoMan-Man-start-time (current-time))
;;     ad-do-it))

;; (defadvice Man-bgproc-sentinel
;;   (after Man-bgproc-sentinel-advice activate)
;;   ;; Terminates man processing
;;   "Report formatting time."
;;   (message "Man formatting done in %s seconds"
;;            (float-time (time-since WoMan-Man-start-time))))

\f
;;; Buffer handling:

(defun WoMan-previous-manpage ()
  "Find the previous WoMan buffer."
  ;; Assumes currently in a WoMan buffer!
  (interactive)
  (WoMan-find-buffer)			; find current existing buffer
  (if (null (cdr woman-buffer-alist))
      (error "No previous WoMan buffer"))
  (if (>= (setq woman-buffer-number (1+ woman-buffer-number))
	 (length woman-buffer-alist))
      (setq woman-buffer-number 0))
  (if (WoMan-find-buffer)
      ()
    (if (< (setq woman-buffer-number (1- woman-buffer-number)) 0)
	(setq woman-buffer-number (1- (length woman-buffer-alist))))
    (WoMan-previous-manpage)))

(defun WoMan-next-manpage ()
  "Find the next WoMan buffer."
  ;; Assumes currently in a WoMan buffer!
  (interactive)
  (WoMan-find-buffer)			; find current existing buffer
  (if (null (cdr woman-buffer-alist))
      (error "No next WoMan buffer"))
  (if (< (setq woman-buffer-number (1- woman-buffer-number)) 0)
      (setq woman-buffer-number (1- (length woman-buffer-alist))))
  (if (WoMan-find-buffer)
      ()
    (WoMan-next-manpage)))

(defun WoMan-find-buffer ()
  "Switch to buffer corresponding to `woman-buffer-number' and return it.
If such a buffer does not exist then remove its association from the
alist in `woman-buffer-alist' and return nil."
  (if (zerop woman-buffer-number)
      (let ((buffer (get-buffer (cdr (car woman-buffer-alist)))))
	(if buffer
	    (pop-to-buffer-same-window buffer)
	  ;; Delete alist element:
	  (setq woman-buffer-alist (cdr woman-buffer-alist))
	  nil))
    (let* ((prev-ptr (nthcdr (1- woman-buffer-number) woman-buffer-alist))
	   (buffer (get-buffer (cdr (car (cdr prev-ptr))))))
      (if buffer
	  (pop-to-buffer-same-window buffer)
	;; Delete alist element:
	(setcdr prev-ptr (cdr (cdr prev-ptr)))
	(if (>= woman-buffer-number (length woman-buffer-alist))
	    (setq woman-buffer-number 0))
	nil))))

\f
;;; Syntax and display tables:

(defconst woman-escaped-escape-char ?\^\\
  ;; An arbitrary unused control character
  "Internal character representation of escaped escape characters.")
(defconst woman-escaped-escape-string
  (char-to-string woman-escaped-escape-char)
  "Internal string representation of escaped escape characters.")

(defconst woman-unpadded-space-char ?\^\]
  ;; An arbitrary unused control character
  "Internal character representation of unpadded space characters.")
(defconst woman-unpadded-space-string
  (char-to-string woman-unpadded-space-char)
  "Internal string representation of unpadded space characters.")

(defvar woman-syntax-table
  (let ((st (make-syntax-table)))
    ;; The following internal chars must NOT have whitespace syntax:
    (modify-syntax-entry woman-unpadded-space-char "." st)
    (modify-syntax-entry woman-escaped-escape-char "." st)
    st)
  "Syntax table to support special characters used internally by WoMan.")

(defun woman-set-buffer-display-table ()
  "Set up a display table for a WoMan buffer.
This display table is used for displaying internal special characters, but
does not interfere with any existing display table, e.g. for displaying
European characters."
  (setq buffer-display-table
	;; The following test appears to be necessary on some
	;; non-Windows platforms, e.g. Solaris 2.6 when running on a
	;; tty.  Thanks to T. V. Raman <raman@Adobe.COM>.
	;; The MS-DOS terminal also sets standard-display-table to
	;; a non-nil value.
	(if standard-display-table	; default is nil !!!
	    (copy-sequence standard-display-table)
	  (make-display-table)))
  ;; Display the following internal chars correctly:
  (aset buffer-display-table woman-unpadded-space-char [?\s])
  (aset buffer-display-table woman-escaped-escape-char [?\\]))

\f
;;; The main decoding driver:

(defvar font-lock-mode)			; for the compiler

(defun woman-decode-buffer ()
  "Decode a buffer in UN*X man-page source format.
No external programs are used."
  (interactive)				; mainly for testing
  (WoMan-log-begin)
  (run-hooks 'woman-pre-format-hook)
  (and (boundp 'font-lock-mode) font-lock-mode (font-lock-mode -1))
  ;; (fundamental-mode)
  (let ((start-time (current-time))
	time)
    (message "WoMan formatting buffer...")
;  (goto-char (point-min))
;  (cond
;   ((re-search-forward "^\\.[ \t]*TH" nil t) ; wrong format if not found?
;    (beginning-of-line)
;    (delete-region (point-min) (point))) ; potentially dangerous!
;   (t (message "WARNING: .TH request not found -- not man-page format?")))
    (woman-decode-region (point-min) (point-max))
    (setq time (float-time (time-since start-time)))
    (message "WoMan formatting buffer...done in %g seconds" time)
    (WoMan-log-end time))
  (run-hooks 'woman-post-format-hook))

(defvar woman-string-alist		; rebound in woman-decode-region
  '(("S" . "") ("R" . "(Reg.)") ("Tm" . "(TM)")
    ("lq" . "\"") ("rq" . "\"")
    ("''" . "\"")			; needed for gcc.1
    (".T" . "")				; output device from -T option?
    )
  "Alist of strings predefined in the -man macro package `tmac.an'.")

(defvar woman-negative-vertical-space nil ; rebound in woman-decode-region
  "Set to t if .sp N with N < 0 encountered.")

(defun woman-pre-process-region (from to)
  "Pre-process escapes and comments in the region of text between FROM and TO.
To be called on original buffer and any .so insertions."
  ;; Hide escaped escapes \\ and printable escapes \e very early
  ;; (to be re-instated as just \ very late!):
  (goto-char from)
  ;; .eo turns off escape character processing
  (while (re-search-forward "\\(\\\\[\\e]\\)\\|^\\.eo" to t) ; \\
    (if (match-beginning 1)
	(replace-match woman-escaped-escape-string t t)
      (woman-delete-whole-line)
      ;; .ec turns on escape character processing (and sets the
      ;; escape character to its argument, if any, which I'm ignoring
      ;; for now!)
      (while (and (re-search-forward "\\(\\\\\\)\\|^\\.ec" to t) ; \
		  (match-beginning 1))
	(replace-match woman-escaped-escape-string t t))
      ;; ***** Need test for .ec arg and warning here! *****
      (woman-delete-whole-line)))

  ;; Delete comments .\"<anything>, \"<anything> and null requests.
  ;; (However, should null . requests cause a break?)
  (goto-char from)
  (while (re-search-forward "^[.'][ \t]*\\(\\\\\".*\\)?\n\\|\\\\\".*" to t)
    (woman-delete-match 0)))

(defun woman-non-underline-faces ()
  "Prepare non-underlined versions of underlined faces."
  (let ((face-list (face-list)))
    (dolist (face face-list)
      (let ((face-name (symbol-name face)))
	(if (and (string-match-p "\\`woman-" face-name)
		 (face-underline-p face))
	    (let ((face-no-ul (intern (concat face-name "-no-ul"))))
	      (copy-face face face-no-ul)
	      (set-face-underline face-no-ul nil)))))))

;; Preprocessors
;; =============

;; This information is based on documentation for the man command by
;; Graeme W. Wilford <G.Wilford@ee.surrey.ac.uk>

;; First, the environment variable $MANROFFSEQ is interrogated, and if
;; not set then the initial line of the nroff file is parsed for a
;; preprocessor string. To contain a valid preprocessor string, the
;; first line must resemble
;;
;; '\" <string>
;;
;; where string can be any combination of the following letters that
;; specify the sequence of preprocessors to run before nroff or
;; troff/groff.  Not all installations will have a full set of
;; preprocessors.  Some of the preprocessors and the letters used to
;; designate them are: eqn (e), grap (g), pic (p), tbl (t), vgrind
;; (v), refer (r).  This option overrides the $MANROFFSEQ environment
;; variable.  zsoelim is always run as the very first preprocessor.

(defvar woman-emulate-tbl nil
  "True if WoMan should emulate the tbl preprocessor.
This applies to text between .TE and .TS directives.
Currently set only from \\='\\\" t in the first line of the source file.")

(defun woman-decode-region (from _to)
  "Decode the region between FROM and TO in UN*X man-page source format."
  ;; Suitable for use in format-alist.
  ;; But this requires care to control major mode implied font locking.
  ;; Must return the new end of file.  See format.el for details.
  ;; NB: The `to' argument is bogus: it is not currently used, and if
  ;; it were it would need to be a marker rather than a position!
  ;; First force the correct environment:
  (let ((case-fold-search nil)		; This is necessary!
	(woman-string-alist woman-string-alist)
	(woman-fill-column woman-fill-column)
	woman-negative-vertical-space)
    (setq woman-left-margin woman-default-indent
	  woman-prevailing-indent woman-default-indent
	  woman-interparagraph-distance 1
	  woman-leave-blank-lines nil
	  woman-RS-left-margin nil
	  woman-RS-prevailing-indent nil
	  woman-adjust woman-adjust-both
	  woman-justify (aref woman-justify-styles woman-adjust)
	  woman-nofill nil)

    (setq woman-if-conditions-true
	  (cons (string-to-char (symbol-name woman-emulation)) '(?e ?o)))

    ;; Prepare non-underlined versions of underlined faces:
    (woman-non-underline-faces)
    ;; Set font of `woman-symbol' face to `woman-symbol-font' if
    ;; `woman-symbol-font' is well defined.
    (and woman-use-symbol-font
	 (stringp woman-symbol-font)
	 (set-face-font 'woman-symbol woman-symbol-font
			(and (frame-live-p woman-frame) woman-frame)))

    (setq-local adaptive-fill-mode nil) ; No special "%" "#" etc filling.

        ;; Set syntax and display tables:
    (set-syntax-table woman-syntax-table)
    (woman-set-buffer-display-table)

    ;; Based loosely on a suggestion by Theodore Jump:
    (if (or woman-fill-frame
	    (not (and (integerp woman-fill-column) (> woman-fill-column 0))))
	(setq woman-fill-column (- (window-width) woman-default-indent)))

    ;; Check for preprocessor requests:
    (goto-char from)
    (if (looking-at "'\\\\\"[ \t]*\\([a-z]+\\)")
	(let ((letters (append (match-string 1) nil)))
	  (if (memq ?t letters)
	      (setq woman-emulate-tbl t
		    letters (delete ?t letters)))
	  (if letters
	      (WoMan-warn "Unhandled preprocessor request letters %s"
			  (concat letters)))
	  (woman-delete-line 1)))

    (woman-pre-process-region from nil)
    ;; Process ignore requests, macro definitions,
    ;; conditionals and switch source requests:
    (woman0-roff-buffer from)

    ;; Check for macro sets that woman cannot handle.  We can only
    ;; because do this after processing source-switch directives.
    (goto-char (point-min))
    (let ((case-fold-search nil))
      (unless (and (re-search-forward "^\\.SH[ \n]" (point-max) t)
		   (progn (goto-char (point-min))
			  (re-search-forward "^\\.TH[ \n]" (point-max) t))
		   (progn (goto-char (point-min))
			  (not (re-search-forward "^\\.\\([pnil]p\\|sh\\)[ \n]"
						  (point-max) t))))
	(error "WoMan can only format man pages written with the usual `-man' macros")))

    ;; Process \k escapes BEFORE changing tab width (?):
    (goto-char from)
    (woman-mark-horizontal-position)

    ;; Set buffer-local variables:
    (setq fill-column woman-fill-column
	  tab-width woman-tab-width)

    ;; Ignore the \, and \/ kerning operators.  See
    ;; https://www.gnu.org/software/groff/manual/groff.html#Ligatures-and-Kerning
    (goto-char (point-min))
    (while (re-search-forward "\\\\[,/]" nil t)
      (replace-match "" t t))

    ;; Hide unpaddable and digit-width spaces \(space) and \0:
    (goto-char from)
    (while (re-search-forward "\\\\[ 0]" nil t)
      (replace-match woman-unpadded-space-string t t))

    ;; Discard optional hyphen \%; concealed newlines \<newline>;
    ;; point-size change function \sN,\s+N, \s-N:
    (goto-char from)
    (while (re-search-forward "\\\\\\([%\n]\\|s[-+]?[0-9]+\\)" nil t)
      (woman-delete-match 0))

    ;; BEWARE: THIS SHOULD PROBABLY ALL BE DONE MUCH LATER!!!!!
    ;; Process trivial escapes \-, \`, \.
    ;; (\' must be done after tab processing!):
    (goto-char from)
    (while (re-search-forward "\\\\\\([-`.]\\)" nil t)
      (replace-match "\\1"))
    ;; NB: Must keep ALL zero-width characters \&, \|, and \^ until
    ;; ALL requests processed!

    ;; Process no-break requests and macros (including font-change macros):
    (goto-char from)
    (woman1-roff-buffer)

    ;; Process strings and special character escapes \(xx:
    ;; (Must do this BEFORE fontifying!)
    (goto-char from)
    (woman-strings)
    ;; Special chars moved after translation in
    ;; `woman2-process-escapes' (for pic.1):
;    (goto-char from)
;    (woman-special-characters)

    ;; Process standard font-change requests and escapes:
    (goto-char from)
    (woman-change-fonts)

    ;; 1/2 em vertical motion \d, \u and general local vertical motion
    ;; \v'+/-N' simulated using TeX ^ and _ symbols for now.
    (goto-char from)
    (let ((first t))			; assume no nesting!
      (while (re-search-forward "\\\\\\([du]\\|v'[^']*'\\)" nil t)
	(let* ((esc (match-string 1))
	       (repl (if (or (= (aref esc 0) ?u)
			     (and (>= (length esc) 2) (= (aref esc 2) ?-)))
			 "^" "_")))
	  (cond (first
		 (replace-match repl nil t)
		 (put-text-property (1- (point)) (point) 'face 'woman-addition)
		 (WoMan-warn
		  "Initial vertical motion escape \\%s simulated" esc)
		 (WoMan-log
		  "      by TeX `%s' in woman-addition-face!" repl))
		(t
		 (woman-delete-match 0)
		 (WoMan-warn
		  "Terminal vertical motion escape \\%s ignored!" esc)))
	  (setq first (not first)))))

    ;; Process formatting macros
    (goto-char from)
    (woman2-roff-buffer)

    ;; Go back and process negative vertical space if necessary:
    (if woman-negative-vertical-space
	(woman-negative-vertical-space from))

    (when woman-preserve-ascii
      ;; Re-instate escaped escapes to just `\' and unpaddable spaces
      ;; to just `space'.  This is not necessary for display since
      ;; there are display table entries for the escaped chars, but it
      ;; is necessary if the buffer might be saved as ASCII.
      ;;
      ;; `subst-char-in-region' preserves text properties on the
      ;; characters, which is necessary for bold, underline, etc on
      ;; \e.  There's usually no face on spaces, but if there is then
      ;; it's good to keep that too.
      (subst-char-in-region from (point-max)
			    woman-escaped-escape-char ?\\)
      (subst-char-in-region from (point-max)
			    woman-unpadded-space-char ?\s))

    ;; Must return the new end of file if used in format-alist.
    (point-max)))

(defun woman-horizontal-escapes (to)
  "Process \\h'+/-N' local horizontal motion escapes upto TO.
Implements arbitrary forward and non-overlapping backward motion.
Preserves location of `point'."
  ;; Moved from `woman-decode-region' for version 0.50.
  ;; N may include width escape \w'...' (but may already be processed!
  (let ((from (point)))
    (while (re-search-forward
	    ;; Delimiter can be a special char escape sequence \(.. or
	    ;; a single normal char (usually '):
	    "\\\\h\\(\\\\(..\\|.\\)\\(|\\)?"
	    to t)
      (let ((from (match-beginning 0))
	    (delim (regexp-quote (match-string 1)))
	    (absolute (match-beginning 2)) ; absolute position?
	    (N (woman-parse-numeric-arg)) ; distance
	    to
	    msg)			; for warning
	(if (not (looking-at delim))
	    ;; Warn but leave escape in buffer unprocessed:
	    (WoMan-warn
	     "Local horizontal motion (%s) delimiter error!"
	     (buffer-substring from (1+ (point)))) ; point at end of arg
	  (setq to (match-end 0)
		;; For possible warning -- save before deleting:
		msg (buffer-substring from to))
	  (delete-region from to)
	  (if absolute			; make relative
	      (setq N (- N (current-column))))
	  (if (>= N 0)
	      ;; Move forward by inserting hard spaces:
	      (insert-char woman-unpadded-space-char N)
	    ;; Move backwards by deleting space,
	    ;; first backwards then forwards:
	    (while (and
		    (<= (setq N (1+ N)) 0)
		    (cond ((memq (preceding-char) '(?\s ?\t))
			   (delete-char -1) t)
			  ((memq (following-char) '(?\s ?\t))
			   (delete-char 1) t)
			  (t nil))))
	    (if (<= N 0)
		(WoMan-warn
		 "Negative horizontal motion (%s) would overwrite!" msg))))))
    (goto-char from)))


\f
;; Process ignore requests (.ig), conditionals (.if etc.),
;; source-switch (.so), macro definitions (.de etc.) and macro
;; expansions.

(defvar woman0-if-to)			; marker bound in woman0-roff-buffer
(defvar woman0-macro-alist)		; bound in woman0-roff-buffer
(defvar woman0-search-regex)		; bound in woman0-roff-buffer
(defvar woman0-search-regex-start	; bound in woman0-roff-buffer
  "^[.'][ \t]*\\(ig\\|if\\|ie\\|el\\|so\\|rn\\|de\\|am")
(defconst woman0-search-regex-end "\\)\\([ \t]+\\|$\\)")
;; May need other terminal characters, e.g. \, but NOT \n!
;; Alternatively, force maximal match (Posix?)

(defvar woman0-rename-alist)		; bound in woman0-roff-buffer

(defun woman0-roff-buffer (from)
  "Process conditional-type requests and user-defined macros.
Start at FROM and re-scan new text as appropriate."
  (goto-char from)
  (let ((woman0-if-to (make-marker))
	woman-request woman0-macro-alist
	(woman0-search-regex-start woman0-search-regex-start)
	(woman0-search-regex
	 (concat woman0-search-regex-start woman0-search-regex-end))
	processed-first-hunk
	woman0-rename-alist)
    (set-marker-insertion-type woman0-if-to t)
    (while (re-search-forward woman0-search-regex nil t)
      (setq woman-request (match-string 1))

      ;; Process escape sequences prior to first request (Bug#7843).
      (unless processed-first-hunk
	(setq processed-first-hunk t)
	(let ((process-escapes-to-marker (point-marker)))
	  (set-marker-insertion-type process-escapes-to-marker t)
	  (save-match-data
	    (save-excursion
	      (goto-char from)
	      (woman2-process-escapes process-escapes-to-marker)))))

      (cond ((string= woman-request "ig") (woman0-ig))
	    ((string= woman-request "if") (woman0-if "if"))
	    ((string= woman-request "ie") (woman0-if "ie"))
	    ((string= woman-request "el") (woman0-el))
	    ((string= woman-request "so") (woman0-so))
	    ((string= woman-request "rn") (woman0-rn))
	    ((string= woman-request "de") (woman0-de))
	    ((string= woman-request "am") (woman0-de 'append))
	    (t                      (woman0-macro woman-request))))
    (set-marker woman0-if-to nil)
    (woman0-rename)
    ;; Should now re-run `woman0-roff-buffer' if any renaming was
    ;; done, but let's just hope this is not necessary for now!
    ))

(defun woman0-ig ()
  ".ig yy -- Discard input up to `.yy', which defaults to `..')."
  ;; The terminal request MUST begin with . (not ')!
  (looking-at "\\(\\S +\\)?")
  (beginning-of-line)
  (let ((yy (or (match-string 1) "."))
	(from (point)))
    (if (re-search-forward
	 (concat "^\\.[ \t]*" (regexp-quote yy) ".*\n") nil t)
	(delete-region from (point))
      (WoMan-warn
       "ig request ignored -- terminator `.%s' not found!" yy)
      (woman-delete-line 1))))

(defsubst woman0-process-escapes (from to)
  "Process escapes within an if/ie condition between FROM and TO."
  (woman-strings to)
  (goto-char from)			; necessary!
  ;; Strip font-change escapes:
  (while (re-search-forward "\\\\f\\(\\[[^]]+\\]\\|(..\\|.\\)" to t)
    (woman-delete-match 0))
  (goto-char from)			; necessary!
  (woman2-process-escapes to 'numeric))

;; request does not appear to be used dynamically by any callees.
(defun woman0-if (request)
  ".if/ie c anything -- Discard unless c evaluates to true.
Remember condition for use by a subsequent `.el'.
REQUEST is the invoking directive without the leading dot."
  ;; c evaluates to a one-character built-in condition name or
  ;; 'string1'string2' or a number > 0, prefix ! negates.
  ;; \{ ... \} for multi-line use.
  ;; Leaves point at start of new text.
  (woman-delete-match 0)
  ;; (delete-horizontal-space)
  ;; Process escapes in condition:
  (let ((from (point)) negated n (c 0))
    (set-marker woman0-if-to
		(save-excursion (skip-syntax-forward "^ ") (point)))
    ;; Process condition:
    (if (setq negated (= (following-char) ?!)) (delete-char 1))
    (cond
     ;; ((looking-at "[no]") (setq c t))     ; accept n(roff) and o(dd page)
     ;; ((looking-at "[te]") (setq c nil))   ; reject t(roff) and e(ven page)
     ;; Per groff ".if v" is recognized as false (it means -Tversatec).
     ((looking-at "[ntoev]")
      (setq c (memq (following-char) woman-if-conditions-true)))
     ;; Unrecognized letter so reject:
     ((looking-at "[A-Za-z]") (setq c nil)
      (WoMan-warn "%s %s -- unrecognized condition name rejected!"
		  request (match-string 0)))
     ;; Accept strings if identical:
     ((save-restriction
	(narrow-to-region from woman0-if-to)
	;; String delimiter can be any non-numeric character,
	;; including a special character escape:
	(looking-at "\\(\\\\(..\\|[^0-9]\\)\\(.*\\)\\1\\(.*\\)\\1\\'"))
      (let ((end1 (copy-marker (match-end 2) t))) ; End of first string.
	;; Delete 2nd and 3rd delimiters to avoid processing them:
	(delete-region (match-end 3) woman0-if-to)
	(delete-region (match-end 2) (match-beginning 3))
	(goto-char (match-end 1))
	(woman0-process-escapes (point) woman0-if-to)
	(setq c (string= (buffer-substring (point) end1)
			 (buffer-substring end1 woman0-if-to)))
	(set-marker end1 nil)
	(goto-char from)))
     ;; Accept numeric value if > 0:
     ((numberp (setq n (progn
			 (woman0-process-escapes from woman0-if-to)
			 (woman-parse-numeric-arg))))
      (setq c (> n 0))
      (goto-char from)))
    (if (eq c 0)
	(woman-if-ignore woman0-if-to request) ; ERROR!
      (woman-if-body request woman0-if-to (eq c negated)))))

;; request is not used dynamically by any callees.
(defun woman-if-body (request to delete) ; should be reversed as `accept'?
  "Process if-body, including \\{ ... \\}.
REQUEST is the invoking directive without the leading dot.
If TO is non-nil then delete the if-body.
If DELETE is non-nil then delete from point."
  ;; Assume concealed newlines already processed.
  (let ((from (point)))
    (if to (delete-region (point) to))
    (delete-horizontal-space)
    (cond (;;(looking-at "[^{\n]*\\\\{\\s *") ; multi-line
	   ;; allow escaped newlines:
	   (looking-at "[^{\n]*\\(\\\\\n\\)*\\\\{\\s *\\(\\\\\n\\)*") ; multi-line
	   ;; including preceding .if(s) and following newline
	   (let ((from (point)))
	     (woman-delete-match 0)
	     ;; Allow for nested \{ ... \} -- BUT BEWARE that this
	     ;; algorithm only supports one level of nesting!
	     (while
		 (and (re-search-forward
		       ;; "\\(\\\\{\\)\\|\\(\n[.']\\)?[ \t]*\\\\}[ \t]*"
		       ;; Interpret bogus `el \}' as `el \{',
		       ;; especially for Tcl/Tk man pages:
		       "\\(\\\\{\\|el[ \t]*\\\\}\\)\\|\\(\n[.']\\)?[ \t]*\\\\}[ \t]*")
		      (match-beginning 1))
	       (re-search-forward "\\\\}"))
	     (delete-region (if delete from (match-beginning 0)) (point))
	     (if (looking-at "^$") (delete-char 1))
	     ))
	  (delete (woman-delete-line 1))) ; single-line
    ;; Process matching .el anything:
    (cond ((string= request "ie")
	   ;; Discard unless previous .ie c `evaluated to false'.
	   ;; IIUC, an .ie must be followed by an .el.
	   ;; (An if with no else uses .if rather than .ie.)
	   ;; TODO warn if no .el found?
	   ;; The .el should come immediately after the .ie (modulo
	   ;; comments etc), but this searches to eob.
	   (cond ((re-search-forward "^[.'][ \t]*el[ \t]*" nil t)
		  (woman-delete-match 0)
		  (woman-if-body "el" nil (not delete)))))
;;; FIXME neither the comment nor the code here make sense to me.
;;; This branch was executed for an else (any else, AFAICS).
;;; At this point, the else in question has already been processed above.
;;; The re-search will find the _next_ else, if there is one, and
;;; delete it.  If there is one, it belongs to another if block.  (Bug#9447)
;;; woman0-el does not need this bit either.
	  ;; Got here after processing a single-line `.ie' as a body
	  ;; clause to be discarded:
;;;	  ((string= request "el")
;;;	   (cond ((re-search-forward "^[.'][ \t]*el[ \t]*" nil t)
;;;		  (woman-delete-match 0)
;;;		  (woman-if-body "el" nil t)))))
          )
    (goto-char from)))

(defun woman0-el ()
  "Isolated .el request -- should not happen!"
  (WoMan-warn "el request without matching `ie' rejected!")
  (cond (woman-ignore
	 (woman-delete-match 0)
	 (delete-horizontal-space)
	 (woman-if-body "el" nil t))
	(t				; Ignore -- leave in buffer
	 ;; This does not work too well, but it's only for debugging!
	 (skip-chars-forward "^ \t")
	 (if (looking-at "[ \t]*{") (search-forward "}"))
	 (forward-line 1))))

;; request is not used dynamically by any callees.
(defun woman-if-ignore (to request)
  "Ignore but warn about an if request ending at TO, named REQUEST."
  (WoMan-warn-ignored request "ignored -- condition not handled!")
  (if woman-ignore
      (woman-if-body request to t)
    ;; Ignore -- leave in buffer
    ;; This does not work too well, but it's only for debugging!
    (skip-chars-forward "^ \t")
    (if (looking-at "[ \t]*{") (search-forward "}"))
    (forward-line 1)))

(defun woman0-so ()
  ".so filename -- Switch source file.  `.so' requests may be nested."
  ;; Leaves point at start of new text.
  ;; (skip-chars-forward " \t")
  (let* ((beg (point))
	 (end (progn (woman-forward-arg 'unquote) (point)))
	 (name (buffer-substring beg end))
	 (filename name))
    ;; If the specified file does not exist in this ...
    (or (file-exists-p filename)
	;; or the parent directory ...
 	(file-exists-p
 	 (setq filename (concat "../" name)))
	;; then use the WoMan search mechanism to find the filename ...
	(setq filename
	      (woman-file-name
	       (file-name-base name)))
	;; Cannot find the file, so ...
	(kill-buffer (current-buffer))
	(error "File `%s' not found" name))
    (beginning-of-line)
    (woman-delete-line 1)
    (let* ((from (point))
           (length (woman-insert-file-contents filename 0))
           (to (copy-marker (+ from length) t)))
      (woman-pre-process-region from to)
      (set-marker to nil)
      (goto-char from))))

\f
;;; Process macro definitions:

(defun woman0-rn ()
  "Process .rn xx yy -- rename macro xx to yy."
  ;; For now, done backwards AFTER all macro expansion.
  ;; Should also allow requests and strings to be renamed!
  (if (eolp)				; ignore if no argument
      ()
    (let* ((beg (point))
	   (end (progn (woman-forward-arg 'unquote 'concat) (point)))
	   (old (buffer-substring beg end))
	   new)
      (if (eolp)			; ignore if no argument
	  ()
	(setq beg (point)
	      end (progn (woman-forward-arg 'unquote) (point))
	      new (buffer-substring beg end)
	      woman0-rename-alist (cons (cons new old) woman0-rename-alist)))))
  (woman-delete-whole-line))

(defun woman0-rename ()
  "Effect renaming required by .rn requests."
  ;; For now, do this backwards AFTER all macro expansion.
  (dolist (new woman0-rename-alist)
    (let ((old (cdr new))
          (new (car new)))
      (goto-char (point-min))
      (setq new (concat "^[.'][ \t]*" (regexp-quote new)))
      (setq old (concat "." old))
      (while (re-search-forward new nil t)
	(replace-match old nil t)))))

(defconst woman-unescape-regex
  (concat woman-escaped-escape-string
	  "\\(" woman-escaped-escape-string "\\)?"))

(defsubst woman-unescape (macro)
  "Replace escape sequences in the body of MACRO.
Replaces || by |, but | by \\, where | denotes the internal escape."
  (let (start)
    (while (setq start (string-match woman-unescape-regex macro start))
      (setq macro
	    (if (match-beginning 1)
		(replace-match "" t t macro 1)
	      (replace-match "\\" t t macro))
	    start (1+ start)))
    macro))

(defun woman0-de (&optional append)
  "Process .de/am xx yy -- (re)define/append macro xx; end at `..'.
\(Should be up to call of yy, which defaults to `.')
Optional argument APPEND, if non-nil, means append macro."
  ;; Modeled on woman-strings.  BEWARE: Processing of .am is a hack!
  ;; Add support for .rm?
  ;; (skip-chars-forward " \t")
  (if (eolp)				; ignore if no argument
      ()
    (looking-at "[^ \t\n]+")		; macro name
    (let* ((macro (match-string 0)) from
	   (previous (assoc macro woman0-macro-alist)))
      (if (not previous)
	  (setq woman0-search-regex-start
		(concat woman0-search-regex-start "\\|" (regexp-quote macro))
		woman0-search-regex
		(concat woman0-search-regex-start woman0-search-regex-end)
		))
      ;; Macro body runs from start of next line to line
      ;; beginning with `..'."
      ;; The terminal request MUST begin with `.' (not ')!
      (forward-line)
      (setq from (point))
      (re-search-forward "^\\.[ \t]*\\.")
      (beginning-of-line)
      (let ((body (woman-unescape (buffer-substring from (point)))))
	(if (and append previous)
	    (setq previous (cdr previous)
		  body (concat body (cdr previous))
		  append (car previous)
		  ))
	(setq macro (cons macro (cons append body))))
      ;; This should be an update, but consing a new string
      ;; onto the front of the alist has the same effect:
      (setq woman0-macro-alist (cons macro woman0-macro-alist))
      (forward-line)
      (delete-region from (point))
      (backward-char)))			; return to end of .de/am line
  (beginning-of-line)			; delete .de/am line
  (woman-delete-line 1))

;; request may be used dynamically (woman-interpolate-macro calls
;; woman-forward-arg).
(defun woman0-macro (woman-request)
  "Process the macro call named WOMAN-REQUEST."
  ;; Leaves point at start of new text.
  (let ((macro (assoc woman-request woman0-macro-alist)))
    (if macro
	(woman-interpolate-macro (cdr macro))
      ;; SHOULD DELETE THE UNINTERPRETED REQUEST!!!!!
      ;; Output this message once only per call (cf. strings)?
      (WoMan-warn "Undefined macro %s not interpolated!" woman-request))))

(defun woman-interpolate-macro (macro)
  "Interpolate (.de) or append (.am) expansion of MACRO into the buffer."
  ;; Could make this more efficient by checking which arguments are
  ;; actually used in the expansion!
  (skip-chars-forward " \t")
  ;; Process arguments:
  (let ((argno 0) (append (car macro))
	argno-string formal-arg from actual-arg start)
    (setq macro (cdr macro))
    (while (not (eolp))
      ;; Get next actual arg:
      (setq argno (1+ argno))
      (setq argno-string (format "%d" argno))
      (setq formal-arg (concat "\\\\\\$" argno-string)) ; regexp
      (setq from (point))
      (woman-forward-arg 'unquote 'noskip)
      (setq actual-arg (buffer-substring from (point)))
      (skip-chars-forward " \t")  ; now skip following whitespace!
      ;; Replace formal arg with actual arg:
      (setq start nil)
      (while (setq start (string-match formal-arg macro start))
	(setq macro (replace-match actual-arg t t macro))))
    ;; Delete any remaining formal arguments:
    (setq start nil)
    (while
	(setq start (string-match "\\\\\\$." macro start))
      (setq macro (replace-match "" t t macro)))
    ;; Replace .$ number register with actual arg:
    ;; (Do this properly via register mechanism later!)
    (setq start nil)
    (while
	(setq start (string-match "\\\\n(\\.\\$" macro start)) ; regexp
      (setq macro (replace-match argno-string t t macro)))
    (if append
	(forward-char)
      (beginning-of-line)
      (woman-delete-line 1))
    (save-excursion			; leave point at start of new text
      (insert macro))))

\f
;;; Process strings:

(defun woman-match-name ()
  "Match and move over name of form: x, (xx or [xxx...].
Applies to number registers, fonts, strings/macros/diversions, and
special characters."
  (cond ((= (following-char) ?\[ )
	 (forward-char)
	 (re-search-forward "[^]]+")
	 (forward-char))		; skip closing ]
	((= (following-char) ?\( )
	 (forward-char)
	 (re-search-forward ".."))
	(t (re-search-forward "."))))

(defun woman-strings (&optional to)
  "Process ?roff string requests and escape sequences up to buffer position TO.
Strings are defined/updated by `.ds xx string' requests and
interpolated by `\\*x' and `\\*(xx' escapes."
  ;; Add support for .as and .rm?
  (while
      ;; Find .ds requests and \* escapes:
      (re-search-forward "\\(^[.'][ \t]*ds\\)\\|\\\\\\*" to t)
    (cond ((match-beginning 1)		; .ds
	   (skip-chars-forward " \t")
	   (if (eolp)			; ignore if no argument
	       ()
	     (re-search-forward "[^ \t\n]+")
	     (let ((string (match-string 0)))
	       (skip-chars-forward " \t")
	       (if (= ?\" (following-char))
		   ;; Double-quote starts a string, eg.
		   ;;   .ds foo "blah...
		   ;; is value blah... through to newline.  There's no
		   ;; closing " (per the groff manual), but rather any
		   ;; further " is included literally in the string.  Eg.
		   ;;   .ds foo ""
		   ;; sets foo to a single " character.
		   (forward-char))
	       (setq string (cons string
				  (buffer-substring (point)
						    (line-end-position))))
	       ;; This should be an update, but consing a new string
	       ;; onto the front of the alist has the same effect:
	       (setq woman-string-alist (cons string woman-string-alist))
	       ))
	   (beginning-of-line)
	   (woman-delete-line 1))
	  (t				; \*
	   (let ((beg (match-beginning 0)))
	     (woman-match-name)
	     (let* ((stringname (match-string 0))
		   (string (assoc stringname woman-string-alist)))
	       (cond (string
		      (delete-region beg (point))
		      ;; Temporary hack in case string starts with a
		      ;; control character:
		      (if (bolp) (insert-before-markers "\\&"))
		      (insert-before-markers (cdr string)))
		     (t
		      (WoMan-warn "Undefined string %s not interpolated!"
			       stringname)
		      (cond (woman-ignore
			     ;; Output above message once only per call
			     (delete-region beg (point))
			     (setq woman-string-alist
				   (cons (cons stringname "")
					 woman-string-alist))))))))))))

\f
;;; Process special character escapes \(xx:

(defconst woman-special-characters
  ;; To be built heuristically as required!
  ;; MUST insert all characters as strings for correct conversion to
  ;; multibyte representation!
  '(("em" "--"  "\276" . t)		; 3/4 Em dash
    ("bu" "*"   "\267" . t)		; bullet
    ("fm" "'")				; foot mark
    ("co" "(C)" "\251")			; copyright

    ("pl" "+"      "+" . t)		; math plus
    ("mi" "-"      "-" . t)		; math minus
    ("**" "*"      "*" . t)		; math star
    ("aa" "'"   "\242" . t)		; acute accent
    ("ul" "_")				; underrule

    ("*S" "Sigma"  "S" . t)		; Sigma

    (">=" ">="  "\263" . t)		; >=
    ("<=" "<="  "\243" . t)		; <=
    ("->" "->"  "\256" . t)		; right arrow
    ("<-" "<-"  "\254" . t)		; left arrow
    ("mu" " x " "\264" . t)		; multiply
    ("+-" "+/-" "\261" . t)		; plus-minus
    ("bv" "|")				; bold vertical

    ;; groff etc. extensions:
    ;; List these via eg man -Tdvi groff_char > groff_char.dvi.
    ("lq" "\"")
    ("rq" "\"")
    ("aq" "'")
    ("ha" "^")
    ("ti" "~")
    ("oq" "‘")                          ; u2018
    ("cq" "’")                          ; u2019
    ("hy" "‐")                          ; u2010
    )
  "Alist of special character codes with ASCII and extended-font equivalents.
Each alist elements has the form
   (input-string ascii-string extended-font-string . use-symbol-font)
where
 * `\\(input-string' is the ?roff encoding,
 * `ascii-string' is the (multi-character) ASCII simulation,
 * `extended-font-string' is the single-character string representing
    the character position in the extended 256-character font, and
 * `use-symbol-font' is t to indicate use of the symbol font or nil,
    i.e. omitted, to indicate use of the default font.
Any element may be nil.  Avoid control character codes (0 to \\37, \\180
to \\237) in `extended-font-string' for now, since they can be
displayed only with a modified display table.

Use the WoMan command `woman-display-extended-fonts' or a character
map accessory to help construct this alist.")

(defsubst woman-replace-match (newtext &optional face)
  "Replace text matched by last search with NEWTEXT and return t.
Set NEWTEXT in face FACE if specified."
  (woman-delete-match 0)
  (insert-before-markers newtext)
  (if face (put-text-property (1- (point)) (point) 'face 'woman-symbol))
  t)

(defun woman-special-characters (to)
  "Process special character escapes \\(xx, \\[xxx] up to buffer position TO.
\(This must be done AFTER translation, which may use special characters.)"
  (while (re-search-forward "\\\\\\(?:(\\(..\\)\\|\\[\\([[^]]+\\)\\]\\)" to t)
    (let* ((name (or (match-string-no-properties 1)
		     (match-string-no-properties 2)))
	   (replacement (assoc name woman-special-characters)))
      (unless
	  (and
	   replacement
	   (cond ((and (cddr replacement)
		       (if (nthcdr 3 replacement)
			   ;; Need symbol font:
			   (if woman-use-symbol-font
			       (woman-replace-match (nth 2 replacement)
						    'woman-symbol))
			 ;; Need extended font:
			 (if woman-use-extended-font
			     (woman-replace-match (nth 2 replacement))))))
		 ((cadr replacement)	; Use ASCII simulation
		  (woman-replace-match (cadr replacement)))))
	(WoMan-warn (concat "Special character "
			    (if (match-beginning 1) "\\(%s" "\\[%s]")
			    " not interpolated!") name)
	(if woman-ignore (woman-delete-match 0))))))

(defun woman-display-extended-fonts ()
  "Display table of glyphs of graphic characters and their octal codes.
All the octal codes in the ranges [32..127] and [160..255] are displayed
together with the corresponding glyphs from the default and symbol fonts.
Useful for constructing the alist variable `woman-special-characters'."
  (interactive)
  (with-output-to-temp-buffer "*WoMan Extended Font Map*"
    (with-current-buffer standard-output
      (let ((i 32))
	(while (< i 256)
	  (insert (format "\\%03o " i) (string i) " " (string i))
	  (put-text-property (1- (point)) (point)
			     'face 'woman-symbol)
	  (insert "   ")
	  (setq i (1+ i))
	  (when (= i 128) (setq i 160) (insert "\n"))
	  (if (zerop (% i 8)) (insert "\n")))))
    (help-print-return-message)))

\f
;;; Formatting macros that do not cause a break:

;; Bound locally by woman[012]-roff-buffer, and also, annoyingly and
;; confusingly, as a function argument.  Use dynamically in
;; woman-unquote and woman-forward-arg.
(defvar woman-request)

(defun woman-unquote (to)
  "Delete any double-quote characters between point and TO.
Leave point at TO (which should be a marker)."
  (let (in-quote)
    (while (search-forward "\"" to 1)
      (if (and in-quote (looking-at "\""))
	  ;; Repeated double-quote represents single double-quote
	  (delete-char 1)
	(if (or in-quote (looking-at ".*\"")) ; paired
	    (delete-char -1))
	(setq in-quote (not in-quote))
	))
    (if in-quote
	(WoMan-warn "Unpaired \" in .%s arguments." woman-request))))

(defsubst woman-unquote-args ()
  "Delete any double-quote characters up to the end of the line."
  (woman-unquote (save-excursion (end-of-line) (point-marker))))

(defvar woman1-unquote)          ; bound locally by woman1-roff-buffer

(defun woman1-roff-buffer ()
  "Process non-breaking requests."
  (let ((case-fold-search t)
	woman-request fn woman1-unquote)
    (while
	;; Find next control line:
	(re-search-forward woman-request-regexp nil t)
      (cond
       ;; Construct woman function to call:
       ((setq fn (intern-soft
		  (concat "woman1-"
			  (setq woman-request (match-string 1)))))
	(if (get fn 'notfont)		; not a font-change request
	    (funcall fn)
	  ;; Delete request or macro name:
	  (woman-delete-match 0)
	  ;; If no args then apply to next line else unquote args
	  ;; (woman1-unquote is used by called function):
	  (setq woman1-unquote (not (eolp)))
	  (if (eolp) (delete-char 1))
;	    ;; Hide leading control character in unquoted argument:
;	    (cond ((memq (following-char) '(?. ?'))
;		   (insert "\\&")
;		   (beginning-of-line)))
	  ;; Call the appropriate function:
	  (funcall fn)
	  ;; Hide leading control character in quoted argument (only):
	  (if (and woman1-unquote (memq (following-char) '(?. ?')))
	      (insert "\\&"))))))))

;;; Font-changing macros:

(defun woman1-B ()
  ".B -- Set words of current line in bold font."
  (woman1-B-or-I ".ft B\n"))

(defun woman1-I ()
  ".I -- Set words of current line in italic font."
  (woman1-B-or-I ".ft I\n"))

(defun woman1-B-or-I (B-or-I)
  ".B/I -- Set words of current line in bold/italic font.
B-OR-I is the appropriate complete control line."
  ;; Should NOT concatenate the arguments!
  (insert B-or-I) ; because it might be a control line
  ;; Return to bol to process .SM/.B, .B/.if etc.
  ;; or start of first arg to hide leading control char.
  (save-excursion
    (if woman1-unquote
	(woman-unquote-args)
      (while (looking-at "^[.']") (forward-line))
      (end-of-line)
      (delete-horizontal-space))
    (insert "\\fR")))

(defun woman1-SM ()
  ".SM -- Set the current line in small font, i.e. IGNORE!"
  nil)

(defalias 'woman1-SB 'woman1-B)
;; .SB -- Set the current line in small bold font, i.e. just embolden!
;; (This is what /usr/local/share/groff/tmac/tmac.an does.  The
;; Linux man.7 is wrong about this!)

(defun woman1-BI ()
  ".BI -- Join words of current line alternating bold and italic fonts."
  (woman1-alt-fonts (list "\\fB" "\\fI")))

(defun woman1-BR ()
  ".BR -- Join words of current line alternating bold and Roman fonts."
  (woman1-alt-fonts (list "\\fB" "\\fR")))

(defun woman1-IB ()
  ".IB -- Join words of current line alternating italic and bold fonts."
  (woman1-alt-fonts (list "\\fI" "\\fB")))

(defun woman1-IR ()
   ".IR -- Join words of current line alternating italic and Roman fonts."
 (woman1-alt-fonts (list "\\fI" "\\fR")))

(defun woman1-RB ()
   ".RB -- Join words of current line alternating Roman and bold fonts."
  (woman1-alt-fonts (list "\\fR" "\\fB")))

(defun woman1-RI ()
   ".RI -- Join words of current line alternating Roman and italic fonts."
  (woman1-alt-fonts (list "\\fR" "\\fI")))

(defun woman1-alt-fonts (fonts)
  "Join words using alternating fonts in FONTS, which MUST be a dynamic list."
  (nconc fonts fonts)			; circular list!
  (insert (car fonts))
  ;; Return to start of first arg to hide leading control char:
  (save-excursion
    (setq fonts (cdr fonts))
    ;; woman1-unquote is bound in woman1-roff-buffer.
    (woman-forward-arg woman1-unquote 'concat)
    (while (not (eolp))
      (insert (car fonts))
      (setq fonts (cdr fonts))
      (woman-forward-arg woman1-unquote 'concat))
    (insert "\\fR")))

(defun woman-forward-arg (&optional unquote concat)
  "Move forward over one ?roff argument, optionally unquoting and/or joining.
If optional arg UNQUOTE is non-nil then delete any argument quotes.
If optional arg CONCAT is non-nil then join arguments."
  (if (eq (following-char) ?\")
      (progn
	(if unquote (delete-char 1) (forward-char))
	(re-search-forward "\"\\|$")
	;; Repeated double-quote represents single double-quote
	(while (eq (following-char) ?\") ; paired
	  (if unquote (delete-char 1) (forward-char))
	  (re-search-forward "\"\\|$"))
	(if (eq (preceding-char) ?\")
	    (if unquote (delete-char -1))
	  (WoMan-warn "Unpaired \" in .%s arguments." woman-request)))
    ;; (re-search-forward "[^\\\n] \\|$")	; inconsistent
    (skip-syntax-forward "^ "))
  (cond ((null concat) (skip-chars-forward " \t")) ; don't skip eol!
	((eq concat 'noskip))  ; do not skip following whitespace
	(t (woman-delete-following-space))))


;; The following requests are not explicit font-change requests and
;; so are flagged `notfont' to turn off automatic request deletion
;; and further processing.

(put 'woman1-TP 'notfont t)
(defun woman1-TP ()
  ".TP -- After tag line, reset font to Roman for paragraph body."
  ;; Same for .IP, but forward only 1 line?
  (save-excursion
    ;; May be an `irrelevant' control line in the way, so ...
    (forward-line)
    (forward-line (if (looking-at "\\.\\S-+[ \t]*$") 2 1))
    ;; May be looking at control line, so ...
    (insert ".ft R\n")))

(put 'woman1-ul 'notfont t)
(defun woman1-ul ()
  ".ul N -- Underline (italicize) the next N input lines, default N = 1."
  (let ((N (if (eolp) 1 (woman-parse-numeric-arg)))) ; woman-get-numeric-arg ?
    (woman-delete-whole-line)
    (insert ".ft I\n")
    (forward-line N)
    (insert ".ft R\n")))

;;; Other non-breaking requests:

;; Hyphenation
;; Warnings commented out.

(put 'woman1-nh 'notfont t)
(defun woman1-nh ()
  ".nh -- No hyphenation, i.e. IGNORE!"
  ;; Must be handled here to avoid breaking!
  ;; (WoMan-log-1 ".nh request ignored -- hyphenation not supported!")
  (woman-delete-whole-line))

(put 'woman1-hy 'notfont t)
(defun woman1-hy ()
  ".hy N -- Set hyphenation mode to N, i.e. IGNORE!"
  ;; (WoMan-log-1 ".hy request ignored -- hyphenation not supported!")
  (woman-delete-whole-line))

(put 'woman1-hc 'notfont t)
(defun woman1-hc ()
  ".hc c -- Set hyphenation character to c, i.e. delete it!"
  (let ((c (char-to-string (following-char))))
    ;; (WoMan-log
     ;; "Hyphenation character %s deleted -- hyphenation not supported!" c)
    (woman-delete-whole-line)
    (setq c (concat "\\(" c "\\)\\|^[.'][ \t]*hc"))
    (save-excursion
      (while (and (re-search-forward c nil t)
		  (match-beginning 1))
	(delete-char -1)))))

(put 'woman1-hw 'notfont t)
(defun woman1-hw ()
  ".hw words -- Set hyphenation exception words, i.e. IGNORE!"
  ;; (WoMan-log-1 ".hw request ignored -- hyphenation not supported!")
  (woman-delete-whole-line))

;;; Other non-breaking requests correctly ignored by nroff:

(put 'woman1-ps 'notfont t)
(defalias 'woman1-ps 'woman-delete-whole-line)
  ;; .ps -- Point size -- IGNORE!

(put 'woman1-ss 'notfont t)
(defalias 'woman1-ss 'woman-delete-whole-line)
  ;; .ss -- Space-character size -- IGNORE!

(put 'woman1-cs 'notfont t)
(defalias 'woman1-cs 'woman-delete-whole-line)
  ;; .cs -- Constant character space (width) mode -- IGNORE!

(put 'woman1-ne 'notfont t)
(defalias 'woman1-ne 'woman-delete-whole-line)
  ;; .ne -- Need vertical space -- IGNORE!

(put 'woman1-vs 'notfont t)
(defalias 'woman1-vs 'woman-delete-whole-line)
  ;; .vs -- Vertical base line spacing -- IGNORE!

(put 'woman1-bd 'notfont t)
(defalias 'woman1-bd 'woman-delete-whole-line)
  ;; .bd -- Embolden font -- IGNORE!

;;; Non-breaking SunOS-specific macros:

(defun woman1-TX ()
  ".TX t p -- Resolve SunOS abbrev t and join to p (usually punctuation)."
  (insert "SunOS ")
  (woman-forward-arg 'unquote 'concat))

(put 'woman1-IX 'notfont t)
(defalias 'woman1-IX 'woman-delete-whole-line)
  ;; .IX -- Index macro, for Sun internal use -- IGNORE!

\f
;;; Direct font selection:

(defconst woman-font-alist
  '(("R" . default)
    ("I" . woman-italic)
    ("B" . woman-bold)
    ("P" . previous)
    ("1" . default)
    ("2" . woman-italic)
    ("3" . woman-bold)			; used in bash.1
    )
  "Alist of ?roff font indicators and woman font variables and names.")

(defun woman-change-fonts ()
  "Process font changes."
  ;; ***** NEEDS REVISING IF IT WORKS OK *****
  ;; Paragraph .LP/PP/HP/IP/TP and font .B/.BI etc. macros reset font.
  ;; Should .SH/.SS reset font?
  ;; Font size setting macros (?) should reset font.
  (let ((font-alist woman-font-alist) ; for local updating
	(previous-pos (point))
	(previous-font 'default)
	(current-font 'default))
    (while
	;; Find font requests, paragraph macros and font escapes:
	(re-search-forward
	 "^[.'][ \t]*\\(\\(ft\\)\\|\\(.P\\)\\)\\|\\(\\\\f\\)" nil 1)
      (let (font beg notfont fescape)
	;; Match font indicator and leave point at end of sequence:
	(cond ((match-beginning 2)
	       ;; .ft request found
	       (setq beg (match-beginning 0))
	       (skip-chars-forward " \t")
	       (if (eolp)		; default is previous font
		   (setq font previous-font)
		 (looking-at "[^ \t\n]+"))
	       (forward-line))		; end of control line and \n
	      ((match-beginning 3)
	       ;; Macro that resets font found
	       (setq font 'default))
	      ((match-beginning 4)
	       ;; \f escape found
	       (setq beg (match-beginning 0)
                     fescape t)
	       (woman-match-name))
	      (t (setq notfont t)))
	(unless notfont
	  ;; Get font name:
	  (or font
	      (let ((fontstring (match-string 0)))
		(setq font (assoc fontstring font-alist)
		      ;; NB: font-alist contains VARIABLE NAMES.
		      font (if font
			       (cdr font)
			     (WoMan-warn "Unknown font %s." fontstring)
			     ;; Output this message once only per call ...
			     (setq font-alist
				   (cons (cons fontstring 'woman-unknown)
					 font-alist))
			     'woman-unknown)
		      )))
	  ;; Delete font control line or escape sequence:
	  (cond (beg (delete-region beg (point))
		     (if (eq font 'previous) (setq font previous-font))))
          ;; Deal with things like \fB.cvsrc\fR at the start of a line.
          ;; After removing the font control codes, this would
          ;; otherwise match woman-request-regexp. The "\\&" which is
          ;; inserted to prevent this is removed by woman2-process-escapes.
          (and fescape
               (looking-at woman-request-regexp)
               (insert "\\&"))
	  (woman-set-face previous-pos (point) current-font)
	  (if beg
	      ;; Explicit font control
	      (setq previous-pos (point)
		    previous-font current-font)
	    ;; Macro that resets font
	    ;; (forward-line)		; DOES NOT WORK!  but unnecessary?
	    ;; Must process font changes in any paragraph tag!
	    (setq previous-pos (point)
		  previous-font 'default))
	  (setq current-font font)
	  )))
    ;; Set font after last request up to eob:
    (woman-set-face previous-pos (point) current-font)))

(defun woman-set-face (from to face)
  "Set the face of the text from FROM to TO to face FACE.
Ignore the default face and underline only word characters."
  (or (eq face 'default)		; ignore
      (not woman-fontify)
      (if (face-underline-p face)
	  (save-excursion
	    (let ((face-no-ul (intern (concat (symbol-name face) "-no-ul"))))
	      (goto-char from)
	      (while (< (point) to)
		(skip-syntax-forward "w" to)
		(put-text-property from (point) 'face face)
		(setq from (point))
		(skip-syntax-forward "^w" to)
		(put-text-property from (point) 'face face-no-ul)
		(setq from (point))
		)))
	(put-text-property from to 'face face))))

\f
;;; Output translation:

;; This is only set by woman2-tr.  It is bound locally in woman2-roff-buffer.
;; It is also used by woman-translate.  woman-translate may be called
;; outside the scope of woman2-roff-buffer (by experiment).  Therefore
;; this used to be globally bound to nil, to avoid an error.  Instead
;; we can use bound-and-true-p in woman-translate.
(defvar woman-translations)
;; A list of the form (\"[ace]\" (a . b) (c . d) (e . ?\s)) or nil.

(defun woman-get-next-char ()
  "Return and delete next char in buffer, including special chars."
  (if ;;(looking-at "\\\\(\\(..\\)")
      ;; Match special \(xx and strings \*[xxx], \*(xx, \*x:
      (looking-at "\\\\\\((..\\|\\*\\(\\[[^]]+\\]\\|(..\\|.\\)\\)")
      (prog1 (match-string 0)
	(woman-delete-match 0))
    (prog1 (char-to-string (following-char))
      (delete-char 1))))

(defun woman2-tr (to)
  ".tr abcde -- Translate a -> b, c -> d, ..., e -> space.
Format paragraphs upto TO.  Supports special chars.
\(Breaks, but should not.)"
  ;; This should be an update, but consing onto the front of the alist
  ;; has the same effect and match duplicates should not matter.
  ;; Initialize translation data structures:
  (let ((matches (car woman-translations))
	(alist (cdr woman-translations))
	a b)
    ;; `matches' must be a string:
    (setq matches
	  (concat (if matches (substring matches 1 -1)) "]"))
    ;; Process .tr arguments:
    (while (not (eolp))			; (looking-at "[ \t]*$") ???
      (setq a (woman-get-next-char))
      (if (eolp)
	  (setq b " ")
	(setq b (woman-get-next-char)))
      (setq matches
	    (if (= (length a) 1)
		(concat a matches)
	      (concat matches "\\|\\" a))
	    alist (cons (cons a b) alist)))
    (delete-char 1)			; no blank line
    ;; Rebuild translations list:
    (setq matches
	  (if (= (string-to-char matches) ?\])
	      (substring matches 3)
	    (concat "[" matches))
	  woman-translations (cons matches alist))
    ;; Format any following text:
    (woman2-format-paragraphs to)))

(defsubst woman-translate (to)
  "Translate up to marker TO.  Do this last of all transformations."
  (if (bound-and-true-p woman-translations)
      (let ((matches (car woman-translations))
	    (alist (cdr woman-translations))
	    ;; Translations are case-sensitive, eg ".tr ab" does not
	    ;; affect "A" (bug#6849).
	    (case-fold-search nil))
	(while (re-search-forward matches to t)
	  ;; Done like this to retain text properties and
	  ;; support translation of special characters:
	  (insert-before-markers-and-inherit
	   (cdr (assoc
		 (buffer-substring-no-properties
		  (match-beginning 0) (match-end 0))
		 alist)))
	  (woman-delete-match 0)))))

\f
;;; Registers:

(defvar woman-registers			; these are all read-only
  '((".H" 24) (".V" 48)			; resolution in basic units
    (".g" 0)				; not groff
    ;; (Iff emulating groff need to implement groff italic correction
    ;; \/, e.g. for pic.1)
    (".i" left-margin)			; current indent
    (".j" woman-adjust)			; current adjustment
    (".l" fill-column)			; current line length
    (".s" 12)				; current point size
    (".u" (if woman-nofill 0 1))	; 1/0 in fill/nofill mode
    (".v" 48)				; current vertical line spacing
    )
  "Register alist: the key is the register name as a string.
Each element has the form (KEY VALUE . INC) -- inc may be nil.
Also bound locally in `woman2-roff-buffer'.")

(defun woman-mark-horizontal-position ()
  "\\kx -- Store current horizontal position in INPUT LINE in register x."
  (while (re-search-forward "\\\\k\\(.\\)" nil t)
    (goto-char (match-beginning 0))
    (setq woman-registers
	  (cons (list (match-string 1) (current-column))
		woman-registers))
    (woman-delete-match 0)))

(defsubst woman2-process-escapes-to-eol (&optional numeric)
  "Process remaining escape sequences up to eol.
Handle numeric arguments specially if optional argument NUMERIC is non-nil."
  (woman2-process-escapes (copy-marker (line-end-position) t) numeric))

(defun woman2-nr (to)
  ".nr R +/-N M -- Assign +/-N (wrt to previous value, if any) to register R.
The increment for auto-incrementing is set to M.
Format paragraphs upto TO.  (Breaks, but should not!)"
  (let* ((name (buffer-substring
		(point)
		(progn (skip-syntax-forward "^ ") (point))))
	 (pm (progn			; increment
	       (skip-chars-forward " \t")
	       (when (memq (char-after) '(?+ ?-))
		 (forward-char) (char-before))))
	 (value (if (eolp)		; no value
		    nil			; to be interpreted as zero
		  (woman2-process-escapes-to-eol 'numeric)
		  (woman-parse-numeric-arg)))
	 (inc (progn			; auto-increment
		(skip-chars-forward " \t")
		(if (eolp)		; no value
		    nil			; to be interpreted as zero ???
		  (woman-parse-numeric-arg))))
	 (oldvalue (assoc name woman-registers)))
    (when oldvalue
      (setq oldvalue (cdr oldvalue))	; (value . inc)
      (unless inc (setq inc (cdr oldvalue))))
    (cond ((null value)
	   (setq value 0)		; correct?
	   (WoMan-warn "nr %s -- null value assigned as zero!" name))
	  ((symbolp value)
	   (setq value (list 'quote value))))
    (if pm				; increment old value
	(setq oldvalue (if oldvalue (car oldvalue) 0)
	      value (if (eq pm ?+)
			(+ oldvalue value)
		      (- oldvalue value))))
    (setq woman-registers
	  (cons (cons name (cons value inc)) woman-registers))
    (woman-delete-whole-line)
    (woman2-format-paragraphs to)))

\f
;;; Numeric (and "non-text") request arguments:

(defsubst woman-get-numeric-arg ()
  "Get the value of a numeric argument at or after point.
The argument can include the width function and scale indicators.
Assumes 10 characters per inch.  Does not move point."
  (woman2-process-escapes-to-eol 'numeric)
  (save-excursion (woman-parse-numeric-arg)))

(defun woman-parse-numeric-arg ()
  "Get the value of a numeric expression at or after point.
Unlike `woman-get-numeric-arg', leaves point after the argument.
The expression may be an argument in quotes."
  (if (= (following-char) ?\") (forward-char))
  ;; Allow leading +/-:
  (let ((value (if (looking-at "[+-]") 0 (woman-parse-numeric-value)))
	op)
    (while (cond
	    ((looking-at "[+/*%-]")	; arithmetic operators
	     (forward-char)
	     (setq op (intern-soft (match-string 0)))
	     (setq value (funcall op value (woman-parse-numeric-value))))
	    ((looking-at "[<=>]=?")	; relational operators
	     (goto-char (match-end 0))
	     (setq op (intern-soft
                       (if (string-equal (match-string 0) "==")
                           "="
                         (match-string 0))))
	     (setq value (if (funcall op value (woman-parse-numeric-value))
			     1 0)))
	    ((memq (setq op (following-char)) '(?& ?:)) ; Boolean and / or
	     (forward-char)
	     (setq value
		   ;; and / or are special forms, not functions, in ELisp
		   (if (eq op ?&)
		       ;; and
		       (if (> value 0)
			   (if (> (woman-parse-numeric-value) 0) 1 0)
			 ;; skip second operand
			 (prog1 0 (woman-parse-numeric-value)))
		     ;; or
		     (if (> value 0)
			 ;; skip second operand
			 (prog1 1 (woman-parse-numeric-value))
		       (if (> (woman-parse-numeric-value) 0) 1 0))
		     )))
	    ))
;    (if (looking-at "[ \t\nRC)\"]")	; R, C are tab types
;	()
;      (WoMan-warn "Unimplemented numerical operator `%c' in %s"
;		  (following-char)
;		  (buffer-substring
;		   (line-beginning-position)
;		   (line-end-position)))
;      (skip-syntax-forward "^ "))
    value
    ))

(defun woman-parse-numeric-value ()
  "Get a single numeric value at or after point.
The value can be a number register or width function (which assumes 10
characters per inch) and can include scale indicators.  It may be an
expression in parentheses.  Leaves point after the value."
  ;; Must replace every \' by some different single character first
  ;; before calling this function by calling
  ;; (woman2-process-escapes-to-eol 'numeric)
  (if (eq (following-char) ?\()
      ;; Treat parenthesized expression as a single value.
      (let (n)
	(forward-char)
	(setq n (woman-parse-numeric-arg))
	(skip-syntax-forward " " (line-end-position))
	(if (eq (following-char) ?\))
	    (forward-char)
	  (WoMan-warn "Parenthesis confusion in numeric expression!"))
	n)
    (let ((n (cond ((looking-at "[-+]?[.0-9]+")	; single number
		    ;; currently needed to set match-end, even though
		    ;; string-to-number returns 0 if number not parsed.
		    (string-to-number (match-string 0)))
		   ((looking-at "\\\\n\\([-+]\\)?\\(?:\
\\[\\([^]]+\\)\\]\\|(\\(..\\)\\|\\(.\\)\\)")
		    ;; interpolate number register, maybe auto-incremented
		    (let* ((pm (match-string-no-properties 1))
			   (name (or (match-string-no-properties 2)
				     (match-string-no-properties 3)
				     (match-string-no-properties 4)))
			   (value (assoc name woman-registers)))
		      (if value
			  (let (inc)
			    (setq value (cdr value) ; (value . inc)
				  inc (cdr value)
				  ;; eval internal (.X) registers
				  ;; stored as lisp variable names:
				  value (eval (car value)))
			    (if (and pm inc) ; auto-increment
				(setq value
				      (funcall (intern-soft pm) value inc)
				      woman-registers
				      (cons (cons name (cons value inc))
					    woman-registers)))
			    value)
			(WoMan-warn "Undefined register %s defaulted to 0."
				    name)
			0)		; default to zero
		      ))
		   ((re-search-forward
		     ;; Delimiter can be special char escape \[xxx],
		     ;; \(xx or single normal char (usually '):
		     "\\=\\\\w\\(\\\\\\[[^]]+\\]\\|\\\\(..\\|.\\)" nil t)
		    (let ((from (match-end 0))
			  (delim (regexp-quote (match-string 1))))
		      (if (re-search-forward delim nil t)
			  ;; Return width of string:
			  (- (match-beginning 0) from)
			(WoMan-warn "Width escape delimiter error!")))))))
      (if (null n)
	  ;; ERROR -- should handle this better!
	  (progn
	    (WoMan-warn "Numeric/register argument error: %s"
			(buffer-substring
			 (point)
			 (line-end-position)))
	    (skip-syntax-forward "^ " (line-end-position))
	    0)
	(goto-char (match-end 0))
	;; Check for scale factor:
	(if
	    (cond
	     ((looking-at "\\s ") nil)	; stay put!
	     ((looking-at "[mnuv]"))	; ignore for now
	     ((looking-at "i") (setq n (* n 10))) ; inch
	     ((looking-at "c") (setq n (* n 3.9))) ; cm
	     ((let ((case-fold-search nil))
		(looking-at "P"))
	      (setq n (* n 1.7))) ; Pica
	     ((looking-at "p") (setq n (* n 0.14))) ; point
	     ;; NB: May be immediately followed by + or -, etc.,
	     ;; in which case do nothing and return nil.
	     )
	    (goto-char (match-end 0)))
	(if (numberp n) (round n) n)))))

\f
;;; VERTICAL FORMATTING -- Formatting macros that cause a break:

;; Vertical spacing philosophy:
;; Delete all vertical space as it is encountered.  Then insert
;; vertical space only before text, as required.

(defun woman2-roff-buffer ()
  "Process breaks.  Format paragraphs and headings."
  (let ((case-fold-search t)
	(to (make-marker))
	(canonically-space-region
	 (symbol-function 'canonically-space-region))
	(insert-and-inherit (symbol-function 'insert-and-inherit))
	(set-text-properties (symbol-function 'set-text-properties))
	(woman-registers woman-registers)
	fn woman-request woman-translations
	tab-stop-list)
    (set-marker-insertion-type to t)
    ;; ?roff does not squeeze multiple spaces, but does fill, so...
    (fset 'canonically-space-region 'ignore)
    ;; Try to avoid spaces inheriting underlines from preceding text!
    (fset 'insert-and-inherit (symbol-function 'insert))
    (fset 'set-text-properties 'ignore)
    (unwind-protect
        (progn
          (while
              ;; Find next control line:
              (re-search-forward woman-request-regexp nil t)
            (cond
             ;; Construct woman function to call:
             ((setq fn (intern-soft
                        (concat "woman2-"
                                (setq woman-request (match-string 1)))))
              ;; Delete request or macro name:
              (woman-delete-match 0))
             ;; Unrecognized request:
             ((prog1 nil
                ;; (WoMan-warn ".%s request ignored!" woman-request)
                (WoMan-warn-ignored woman-request "ignored!")
                ;; (setq fn 'woman2-LP)
                ;; AVOID LEAVING A BLANK LINE!
                ;; (setq fn 'woman2-format-paragraphs)
                ))
             ;; .LP assumes it is at eol and leaves a (blank) line,
             ;; so leave point at end of line before paragraph:
             ((or (looking-at "[ \t]*$") ; no argument
                  woman-ignore)          ; ignore all
              ;; (beginning-of-line) (kill-line)
              ;; AVOID LEAVING A BLANK LINE!
              (beginning-of-line) (woman-delete-line 1))
             (t (end-of-line) (insert ?\n)))
            (if (not (or fn
                         (and (not (memq (following-char) '(?. ?')))
                              (setq fn 'woman2-format-paragraphs))))
                ()
              ;; Find next control line:
              (if (equal woman-request "TS")
                  (set-marker to (woman-find-next-control-line "TE"))
                (set-marker to (woman-find-next-control-line)))
              ;; Call the appropriate function:
              (funcall fn to)))
          (if (not (eobp))             ; This should not happen, but ...
              (woman2-format-paragraphs (copy-marker (point-max) t)
                                        woman-left-margin)))
      (fset 'canonically-space-region canonically-space-region)
      (fset 'set-text-properties set-text-properties)
      (fset 'insert-and-inherit insert-and-inherit)
      (set-marker to nil))))

(defun woman-find-next-control-line (&optional pat)
  "Find and return start of next control line.
PAT, if non-nil, specifies an additional component of the control
line regexp to search for, which is appended to the default
regexp, \"\\(\\\\c\\)?\\n[.\\=']\"."
  (let ((pattern (concat "\\(\\\\c\\)?\n[.']" pat))
        to)
    (save-excursion
      ;; Must handle
      ;; ...\c
      ;; .br (and other requests?)
      ;; by deleting both the \c and the following request.
      ;; BEWARE THAT THIS CODE MAY BE UNRELIABLE!!!!!
      (while
	  (and
	   (setq to (re-search-forward pattern nil t))
	   (match-beginning 1)
	   (looking-at "br"))
	(goto-char (match-beginning 0))
	(woman-delete-line 2)))
    (if to
	(- to (+ 1 (length pat)))
      (point-max))))

(defun woman2-PD (to)
  ".PD d -- Set the interparagraph distance to d.
Round to whole lines, default 1 line.  Format paragraphs upto TO.
\(Breaks, but should not.)"
  ;; .ie \\n[.$] .nr PD (v;\\$1)
  ;; .el .nr PD .4v>?\n[.V]
  (woman-set-interparagraph-distance)
  (woman2-format-paragraphs to))

(defun woman-set-interparagraph-distance ()
  "Set the interparagraph distance from a .PD request at point."
  (setq woman-interparagraph-distance
	(if (eolp) 1 (woman-get-numeric-arg)))
  ;; Should allow .PD 0 to set zero line spacing
  (woman-delete-line 1))		; ignore remaining args

(defsubst woman-interparagraph-space ()
  "Set variable `woman-leave-blank-lines' from `woman-interparagraph-distance'."
  (setq woman-leave-blank-lines woman-interparagraph-distance))

(defun woman2-TH (to)
  ".TH n c x v m -- Begin a man page.  Format paragraphs upto TO.
n is the name of the page in chapter c; x is extra commentary;
v alters page foot left; m alters page head center.
\(Should set prevailing indent and tabs to 5.)"
  (woman-forward-arg 'unquote 'concat)
  (insert ?\()
  (woman-forward-arg 'unquote 'concat)
  (insert ?\))
  (let ((start (point)) here)
    (while (not (eolp))
      (cond ((looking-at "\"\"[ \t]")
	     (delete-char 2)))
      (delete-horizontal-space)
      (setq here (point))
      (insert " -- ")
      (woman-forward-arg 'unquote 'concat)
      ;; Delete repeated arguments:
      (if (string-equal (buffer-substring here (point))
			(buffer-substring start here))
	  (delete-region here (point)))))
  ;; Embolden heading (point is at end of heading):
  (woman-set-face (line-beginning-position) (point) 'woman-bold)
  (forward-line)
  (delete-blank-lines)
  (setq woman-left-margin woman-default-indent)
  (setq woman-prevailing-indent woman-default-indent)
  (woman2-format-paragraphs to woman-left-margin))

(defun woman2-SH (to)
  ".SH -- Sub-head.  Leave blank line and subhead.
Format paragraphs upto TO.  Set prevailing indent to 5."
  (if (eolp)				; If no args then
      (delete-char 1)			; apply to next line
    (woman-unquote-args)		; else unquote to end of heading
    (beginning-of-line))
  (woman2-process-escapes-to-eol)
  (woman-leave-blank-lines woman-interparagraph-distance)
  (setq woman-leave-blank-lines nil)
  ;; Optionally embolden heading (point is at beginning of heading):
  (if woman-bold-headings
      (woman-set-face (point) (line-end-position) 'woman-bold))
  (forward-line)
  (setq woman-left-margin woman-default-indent
	woman-nofill nil)		; fill output lines
  (setq woman-prevailing-indent woman-default-indent)
  (woman2-format-paragraphs to woman-left-margin))

(defun woman2-SS (to)
  ".SS -- Sub-sub-head.  Like .SH but indent heading 3 spaces.
Format paragraphs upto TO."
  (if (eolp)				; If no args then
      (delete-char 1))			; apply to next line.
  (insert "   ")
  (beginning-of-line)
  (woman2-SH to))

(defun woman2-LP (to)
  ".LP,.PP -- Begin paragraph.  Set prevailing indent to 5.
Leave 1 blank line.  Format paragraphs upto TO."
  (woman-delete-line 1)			; ignore any arguments
  (woman-interparagraph-space)
  (setq woman-prevailing-indent woman-default-indent)
  (woman2-format-paragraphs to woman-left-margin))

(defalias 'woman2-PP 'woman2-LP)
(defalias 'woman2-P 'woman2-LP)

(defun woman2-ns (to)
  ".ns -- Turn on no-space mode.  Format paragraphs upto TO."
  ;; Should not cause a break!
  (woman-delete-line 1)			; ignore argument(s)
  (setq woman-nospace t)
  (woman2-format-paragraphs to))

(defun woman2-rs (to)
  ".rs -- Turn off no-space mode.  Format paragraphs upto TO."
  ;; Should not cause a break!
  (woman-delete-line 1)			; ignore argument(s)
  (setq woman-nospace nil)
  (woman2-format-paragraphs to))

(defun woman2-sp (to)
  ".sp N -- If N > 0 then leave 1 blank line.  Format paragraphs upto TO."
  (let ((N (if (eolp) 1 (woman-get-numeric-arg))))
    (if (>= N 0)
	(woman-delete-line 1)		; ignore argument(s)
      (setq woman-negative-vertical-space t)
      (insert ".sp ")
      (forward-line))
    (setq woman-leave-blank-lines N)
    (woman2-format-paragraphs to)))

(defun woman-negative-vertical-space (from)
  ".sp N with N < 0 => overlap following with preceding lines at FROM."
  ;; Run by woman-decode-region if necessary -- not usually required.
  (WoMan-warn "Negative vertical spacing support is experimental!")
  (goto-char from)
  (while
      ;; Find next control line:
      (re-search-forward "^\\.sp " nil t)
    (let ((N (woman-get-numeric-arg))
	  overlap overwritten)
      (woman-delete-whole-line)
      (setq from (point)
	    overlap (buffer-substring from
				      (progn (forward-line (- N)) (point))))
      (delete-region from (point))
      (forward-line N)
      (let ((imax (length overlap))
	    (i 0) c)
	(while (< i imax)
	  (setq c (aref overlap i))
	  (cond ((eq c ?\n)		; skip
		 (forward-line))
		((eolp)			; extend line
		 ;; Insert character INCLUDING TEXT PROPERTIES:
		 ;; (insert (substring overlap i (1+ i)))
		 (let ((eol (string-match "\n" overlap i)))
		   (insert (substring overlap i eol))
		   (setq i (or eol imax)))
		 )
		((eq c ?\s)		; skip
		 (forward-char))
		((eq c ?\t)		; skip
		 (if (eq (following-char) ?\t)
		     (forward-char)	; both tabs, just skip
		   (dotimes (_ woman-tab-width)
                     (if (eolp)
                         (insert ?\s)	; extend line
                       (forward-char)) ; skip
		     )))
		(t
		 (if (or (eq (following-char) ?\s) ; overwrite OK
			 overwritten) ; warning only once per ".sp -"
		     ()
		   (setq overwritten t)
		   (WoMan-warn
		    "Character(s) overwritten by negative vertical spacing in line %d"
		    (count-lines 1 (point))))
		 (delete-char 1) (insert (substring overlap i (1+ i)))))
	  (setq i (1+ i)))))))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; The following function should probably do ALL width and number
;; register interpolation.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defun woman2-process-escapes (to &optional numeric)
  "Process remaining escape sequences up to marker TO, preserving point.
Optional argument NUMERIC, if non-nil, means the argument is numeric."
  (cl-assert (and (markerp to) (marker-insertion-type to)))
  ;; The first two cases below could be merged (maybe)!
  (let ((from (point)))
    ;; Discard zero width filler character used to hide leading dots
    ;; and zero width characters.
    (while (re-search-forward "\\\\[&|^]" to t)
      (woman-delete-match 0)
      ;; If on a line by itself, consume newline as well (Bug#3651).
      ;; But not in a .nf region, preserve all newlines in that case.
      (and (not woman-nofill)
	   (eq (char-before (match-beginning 0)) ?\n)
	   (eq (char-after (match-beginning 0)) ?\n)
	   (delete-char 1)))

    (goto-char from)
    ;; Interrupt text processing -- CONTINUE current text with the
    ;; next text line (after any control lines, unless processing to
    ;; eol):
    (while (re-search-forward "\\\\c.*\n?" to t)
      (woman-delete-match 0))
    ;; but do not delete the final newline ...
    (if (and (or (eobp) (= (point) to)) (not (bolp)))
	(insert-before-markers ?\n))
    (goto-char from)
    (woman-translate to)
    (goto-char from)
    (woman-special-characters to)
    (goto-char from)
    ;; Printable version of the current escape character, ASSUMED to be `\'
    ;; This must be done LAST of all escape processing!
    ;; Done like this to preserve any text properties of the `\'
    (while (search-forward "\\" to t)
      (let ((c (following-char)))
	;; Some other escapes, such as \f, are handled in
	;; `woman0-process-escapes'.
	(cond ((eq c ?')		; \' -> '
	       (delete-char -1)
	       (cond (numeric		; except in numeric args, \' -> `
		      (delete-char 1)
		      (insert ?`))))
	      ((eq c ?\( ))		; uninterpreted special character
    					; \(.. -- do nothing
	      ((eq c ?t)		; non-interpreted tab \t
	       (delete-char 1)
	       (delete-char -1)
	       (insert "\t"))
	      ((and numeric
		    (memq c '(?w ?n ?h)))) ; leave \w, \n, \h (?????)
	      ((eq c ?l) (woman-horizontal-line)))))
    (goto-char from)
    ;; Process non-default tab settings:
    (cond (tab-stop-list
	   (while (search-forward "\t" to t)
	     (woman-tab-to-tab-stop))
	   (goto-char from)))

    ;; Must replace \' by something before processing \w, done above.

    ;; Replace all `\w' and `\n' escapes:
    ;; (This may be a bit too recursive!)
    (while (re-search-forward "\\\\[nw]" to t)
      (let ((from (match-beginning 0)) N)
	(goto-char from)
	(setq N (woman-parse-numeric-value))
	(delete-region from (point))
	;; Interpolate value:
	(insert-before-markers (number-to-string N))))
    (goto-char from)))

(defun woman-horizontal-line ()
  "\\l\\='Nc\\=' -- Draw a horizontal line of length N using character c, default _."
  (delete-char -1)
  (delete-char 1)
  (looking-at "\\(.\\)\\(.*\\)\\1")
  (forward-char 1)
  (let* ((to (match-end 2))
         (from (match-beginning 0))
         (N (woman-parse-numeric-arg))
         (c (if (< (point) to) (following-char) ?_)))
    (delete-region from to)
    (delete-char 1)
    (insert (make-string N c))))

;;; 4. Text Filling, Adjusting, and Centering

(defun woman2-br (to)
  ".br -- Break.  Leave no blank line.  Format paragraphs upto TO."
  (woman-delete-line 1)			; ignore any arguments
  (woman2-format-paragraphs to))

(defun woman2-fi (to)
  ".fi -- Fill subsequent output lines.  Leave no blank line.
Format paragraphs upto TO."
  (setq woman-nofill nil)
  (woman-delete-line 1)			; ignore any arguments
  ;; Preserve any final blank line in the nofill region:
  (save-excursion
    (forward-line -1)
    (if (looking-at "[ \t]*$") (setq woman-leave-blank-lines 1)))
  (woman2-format-paragraphs to))

(defun woman2-nf (to)
  ".nf -- Nofill.  Subsequent lines are neither filled nor adjusted.
Input text lines are copied directly to output lines without regard
for the current line length.  Format paragraphs up to TO."
  (setq woman-nofill t)
  (woman-delete-line 1)			; ignore any arguments
  (woman2-format-paragraphs to))

(defun woman2-ad (to)
  ".ad c -- Line adjustment is begun (once fill mode is on).
Set justification mode to c if specified.
Format paragraphs upto TO.  (Breaks, but should not.)"
  ;; c = l -- left, r -- right, c -- center, b or n -- both,
  ;; absent -- unchanged.  Initial mode adj,both.
  (setq woman-adjust
	(cond ((eolp) woman-adjust-previous)
	      ((eq (following-char) ?l) woman-adjust-left)
	      ((eq (following-char) ?r) woman-adjust-right)
	      ((eq (following-char) ?c) woman-adjust-center)
	      ((memq (following-char) '(?b ?n)) woman-adjust-both)
	      (t (woman-get-numeric-arg))
	      )
	woman-justify (aref woman-justify-styles woman-adjust))
  (woman-delete-line 1)			; ignore any remaining arguments
  (woman2-format-paragraphs to))

(defun woman2-na (to)
  ".na -- No adjusting.  Format paragraphs upto TO.
\(Breaks, but should not.)"
  (setq woman-adjust-previous woman-adjust
	woman-justify-previous woman-justify
	woman-adjust woman-adjust-left	; fill but do not adjust
	woman-justify (aref woman-justify-styles woman-adjust))
  (woman-delete-line 1)			; ignore any arguments
  (woman2-format-paragraphs to))

;;; The main formatting functions:

(defun woman-leave-blank-lines (&optional leave)
  "Delete all blank lines around point.
Leave one blank line if optional argument LEAVE is non-nil and
non-zero, or if LEAVE is nil and variable `woman-leave-blank-lines' is
non-nil and non-zero."
  ;; ***** It may suffice to delete only lines ABOVE point! *****
  ;; NOTE: Function arguments are evaluated left to right
  ;; (*note (elisp)Function Forms::.).
  (delete-region
   (save-excursion
     (if (not (eq (skip-syntax-backward " ") 0))
	 (forward-line))			; forward-char ?
     (point))
   (progn (skip-syntax-forward " ")
	  (beginning-of-line)
	  (point)))
  (unless woman-nospace
    (if (or (null leave) (eq leave 0))
	;; output any `pending' vertical space ...
	(setq leave woman-leave-blank-lines))
    (if (and leave (> leave 0)) (insert-before-markers ?\n)))
  (setq woman-leave-blank-lines nil))

;; `fill-region-as-paragraph' in `fill.el' appears to be the principal
;; text filling function, so that is what I use here.

(defvar woman-temp-indent nil)

(defun woman2-format-paragraphs (to &optional new-left)
  "Indent, fill and adjust paragraphs upto TO to current left margin.
If optional arg NEW-LEFT is non-nil then reset current left margin.
If `woman-nofill' is non-nil then indent without filling or adjusting."
  ;; Blank space should only ever be output before text.
  (if new-left (setq left-margin new-left))
  (if (looking-at "^\\s *$")
      ;; A blank line should leave a space like .sp 1 (p. 14).
      (setq woman-leave-blank-lines 1))
  (skip-syntax-forward " ")
  ;; Successive control lines are sufficiently common to be worth a
  ;; special case (maybe):
  (unless (>= (point) to)
    (woman-reset-nospace)
    (woman2-process-escapes to 'numeric)
    (if woman-nofill
	;; Indent without filling or adjusting ...
	(progn
	  (woman-leave-blank-lines)
	  (when woman-temp-indent
	    (indent-to woman-temp-indent)
	    (forward-line))
	  (indent-rigidly (point) to left-margin)
	  (woman-horizontal-escapes to))
      ;; Fill and justify ...
      ;; Blank lines and initial spaces cause a break.
      (while (< (point) to)
	(woman-leave-blank-lines)
	(let ((from (point)))
	  ;; Indent first lin  of paragraph:
	  (indent-to (or woman-temp-indent left-margin))
	  (woman-horizontal-escapes to) ; 7 October 1999
	  ;; Find the beginning of the next paragraph:
	  (forward-line)
	  (and (re-search-forward "\\(^\\s *$\\)\\|\\(^\\s +\\)" to 1)
	       ;; A blank line should leave a space like .sp 1 (p. 14).
	       (eolp)
	       (skip-syntax-forward " ")
	       (setq woman-leave-blank-lines 1))
	  ;; This shouldn't happen, but in case it does (e.g. for
	  ;; badly-formatted manfiles with no terminating newline),
	  ;; avoid an infinite loop.
	  (unless (and (eolp) (eobp))
	    (beginning-of-line))
	  ;; If a single short line then just leave it.
	  ;; This is necessary to preserve some table layouts.
	  ;; PROBABLY NOT NECESSARY WITH SQUEEZE MODIFICATION !!!!!
	  (when (or (> (count-lines from (point)) 1)
		    (save-excursion
		      (backward-char)
		      (> (current-column) fill-column)))
	    ;; NOSQUEEZE has no effect if JUSTIFY is full, so redefine
	    ;; canonically-space-region, see above.
	    (if (and woman-temp-indent (< woman-temp-indent left-margin))
		(let ((left-margin woman-temp-indent))
		  (fill-region-as-paragraph from (point) woman-justify)
		  (save-excursion
		    (goto-char from)
		    (forward-line)
		    (setq from (point)))))
	    (fill-region-as-paragraph from (point) woman-justify)))))
    (setq woman-temp-indent nil)))

\f
;;; Tagged, indented and hanging paragraphs:

(defun woman2-TP (to)
  ".TP i -- Set prevailing indent to i.  Format paragraphs upto TO.
Begin indented paragraph with hanging tag given by next text line.
If tag doesn't fit, place it on a separate line."
  (let ((i (woman2-get-prevailing-indent)))
    (woman-leave-blank-lines woman-interparagraph-distance)
    (woman2-tagged-paragraph to i)))

(defun woman2-IP (to)
  ".IP x i -- Same as .TP with tag x.  Format paragraphs upto TO."
  (woman-interparagraph-space)
  (if (eolp)				; no args
      ;; Like LP without resetting prevailing indent
      (woman2-format-paragraphs to (+ woman-left-margin
				      woman-prevailing-indent))
    (woman-forward-arg 'unquote)
    (let ((i (woman2-get-prevailing-indent 'leave-eol)))
      (beginning-of-line)
      (woman-leave-blank-lines)		; must be here,
      ;;
      ;; The cvs.1 manpage contains some (possibly buggy) syntax that
      ;; confuses woman, although the man program displays it ok.
      ;; Most problems are caused by IP followed by another request on
      ;; the next line. Without the following hack, the second request
      ;; gets displayed raw in the output. Note that
      ;; woman2-tagged-paragraph also contains a hack for similar
      ;; issues (eg IP followed by SP).
      ;;
      ;; i) For IP followed by one or more IPs, we ignore all but the
      ;; last (mimic man). The hack in w-t-p would only work for two
      ;; consecutive IPs, and would use the first.
      ;; ii) For IP followed by SP followed by one or more requests,
      ;; do nothing. At least in cvs.1, there is usually another IP in
      ;; there somewhere.
      (unless (or (looking-at "^\\.IP")
                  (and (looking-at "^\\.sp")
                       (save-excursion
                         (and (zerop (forward-line 1))
                              (looking-at woman-request-regexp)))))
        (woman2-tagged-paragraph to i)))))

(defun woman-find-next-control-line-carefully ()
  "Find and return start of next control line, even if already there!"
  (if (looking-at "^[.']")
      (point)
    (woman-find-next-control-line)))

(defun woman2-tagged-paragraph (to i)
  "Begin indented paragraph with hanging tag given by current text line.
If tag doesn't fit, leave it on separate line.
Format paragraphs upto TO.  Set prevailing indent to I."
  (if (not (looking-at "\\s *$"))	; non-empty tag
      (setq woman-leave-blank-lines nil))

  ;; Temporary hack for bash.1, cvs.1 and groff_mmse.7 until code is revised
  ;; to process all requests uniformly.
  ;; This hack deals with IP requests followed by other requests (eg
  ;; SP) on the very next line. We skip over the SP, otherwise it gets
  ;; inserted raw in the rendered output.
  (cond ((and (= (point) to)
              (looking-at "^[.'][ \t]*\\(PD\\|br\\|ta\\|sp\\) *"))
         (if (member (match-string 1) '("br" "sp"))
             (woman-delete-line 1)
           (woman-delete-match 0)
           (if (string= (match-string 1) "ta") ; for GetInt.3
               (woman2-ta to)
             (woman-set-interparagraph-distance)))
         (set-marker to (woman-find-next-control-line-carefully))))

  (let ((tag (point)))
    (woman-reset-nospace)
    ;; Format the tag:
    (woman2-process-escapes-to-eol)
    ;; TIDY UP THE FOLLOWING CODE
    ;; (indent-to woman-left-margin)
    (setq left-margin woman-left-margin)
    (forward-line)
    (fill-region-as-paragraph (save-excursion (forward-line -1) (point))
			      (point) woman-justify)

    ;; Temporary hack for bash.1 until all requests processed uniformly:
    (cond ((and (= (point) to) (looking-at "^[.'][ \t]*PD *"))
	   (woman-delete-match 0)
	   (woman-set-interparagraph-distance)
	   (set-marker to (woman-find-next-control-line-carefully))
	   ))

    ;; Format the paragraph body, if there is one!  Set indented left
    ;; margin anyway, because the paragraph body may begin with a
    ;; control line:
    (setq left-margin (+ woman-left-margin i))
    (cond ((< (point) to)
	   (woman2-format-paragraphs to)
	   (goto-char tag)  (end-of-line)
	   (cond ((> (setq i (- left-margin (current-column))) 0)
		  (delete-char 1)
		  (delete-horizontal-space)
		  ;; Necessary to avoid spaces inheriting underlines.
		  ;; Cannot simply delete (current-column) whitespace
		  ;; characters because some may be tabs!
		  (insert-char ?\s i)))
	   (goto-char to)))))

(defun woman2-HP (to)
  ".HP i -- Set prevailing indent to i.  Format paragraphs upto TO.
Begin paragraph with hanging indent."
  (let ((i (woman2-get-prevailing-indent)))
    (woman-interparagraph-space)
    (setq woman-temp-indent woman-left-margin)
    (woman2-format-paragraphs to (+ woman-left-margin i))))

(defun woman2-get-prevailing-indent (&optional leave-eol)
  "Set prevailing indent to integer argument at point, and return it.
If no argument then return the existing prevailing indent.
Delete line from point and eol unless LEAVE-EOL is non-nil."
  (if (eolp)
      (or leave-eol (delete-char 1))
    (let ((i (woman-get-numeric-arg)))
      (woman-delete-line) (or leave-eol (delete-char 1))
      ;; i = 0 if the argument was not a number
      ;; FIXME should this be >= 0? How else to reset to 0 indent?
      (if (> i 0) (setq woman-prevailing-indent i))))
  woman-prevailing-indent)

(defun woman2-RS (to)
  ".RS i -- Start relative indent, move left margin in distance i.
Set prevailing indent to 5 for nested indents.  Format paragraphs upto TO."
  (push woman-left-margin woman-RS-left-margin)
  (push woman-prevailing-indent woman-RS-prevailing-indent)
  (setq woman-left-margin (+ woman-left-margin
			     (woman2-get-prevailing-indent))
	woman-prevailing-indent woman-default-indent)
  (woman2-format-paragraphs to woman-left-margin))

(defun woman2-RE (to)
  ".RE -- End of relative indent.  Format paragraphs upto TO.
Set prevailing indent to amount of starting .RS."
  (when woman-RS-left-margin
    (setq woman-left-margin (pop woman-RS-left-margin)))
  (when woman-RS-prevailing-indent
    (setq woman-prevailing-indent (pop woman-RS-prevailing-indent)))
  (woman-delete-line 1)			; ignore any arguments
  (woman2-format-paragraphs to woman-left-margin))

\f
;;; Line Length and Indenting:

(defun woman-set-arg (arg &optional previous)
  "Reset, increment or decrement argument ARG, which must be quoted.
If no argument then use value of optional arg PREVIOUS if non-nil,
otherwise set PREVIOUS.  Delete the whole remaining control line."
  (if (eolp)				; space already skipped
      (set arg (if previous (eval previous) 0))
    (if previous (set previous (eval arg)))
    (woman2-process-escapes-to-eol 'numeric)
    (let ((pm (if (looking-at "[+-]")
		(prog1 (following-char)
		  (forward-char 1))))
	(i (woman-parse-numeric-arg)))
    (cond ((null pm) (set arg i))
	  ((= pm ?+) (set arg (+ (eval arg) i)))
	  ((= pm ?-) (set arg (- (eval arg) i)))
	  ))
    (beginning-of-line))
  (woman-delete-line 1))		; ignore any remaining arguments

;; NEED TO RATIONALIZE NAMES FOR PREVIOUS VALUES!
(defvar woman-ll-fill-column woman-fill-column)
(defvar woman-in-left-margin woman-left-margin)

(defun woman2-ll (to)
  ".ll +/-N -- Set, increment or decrement line length.
Format paragraphs upto TO.  (Breaks, but should not.)"
  (woman-set-arg 'fill-column 'woman-ll-fill-column)
  (woman2-format-paragraphs to))

(defun woman2-in (to)
  ".in +/-N -- Set, increment or decrement the indent.
Format paragraphs upto TO."
  (woman-set-arg 'left-margin 'woman-in-left-margin)
  (woman2-format-paragraphs to))

(defun woman2-ti (to)
  ".ti +/-N -- Temporary indent.  Format paragraphs upto TO."
  ;; Ignore if no argument.
  ;; Indent next output line only wrt current indent.
  ;; Current indent is not changed.
  (setq woman-temp-indent left-margin)
  (woman-set-arg 'woman-temp-indent)
  (woman2-format-paragraphs to nil))

\f
;;; Tabs, Leaders, and Fields:

(defun woman2-ta (to)
  ".ta Nt ... -- Set tabs, left type, unless t=R(right), C(centered).
\(Breaks, but should not.)  The tab stops are separated by spaces;
a value preceded by + represents an increment to the previous stop value.
Format paragraphs upto TO."
  (setq tab-stop-list nil)
  (woman2-process-escapes-to-eol 'numeric)
  (save-excursion
    (let ((tab-stop 0))
      (while (not (eolp))
	(let ((plus (cond ((eq (following-char) ?+) (forward-char 1) t)))
	      (i (woman-parse-numeric-arg)))
	  (setq tab-stop (if plus (+ tab-stop i) i)))
	(if (memq (following-char) '(?R ?C))
	    (setq tab-stop (cons tab-stop (following-char))))
	(setq tab-stop-list (cons tab-stop tab-stop-list))
	(skip-syntax-forward "^ ")	; skip following R, C, `;', etc.
	(skip-chars-forward " \t")
	)))
  (woman-delete-line 1)			; ignore any remaining arguments
  (setq tab-stop-list (reverse tab-stop-list))
  (woman2-format-paragraphs to))

(defsubst woman-get-tab-stop (tab-stops)
  "If TAB-STOPS is a cons, return its car, else return TAB-STOPS."
  (if (consp tab-stops) (car tab-stops) tab-stops))

(defun woman-tab-to-tab-stop ()
  "Insert spaces to next defined tab-stop column.
The variable `tab-stop-list' is a list whose elements are either left
tab stop columns or pairs (COLUMN . TYPE) where TYPE is R or C."
  ;; Based on tab-to-tab-stop in indent.el.
  ;; R & C tabs probably not quite right!
  (delete-char -1)
  (let ((tabs tab-stop-list))
    (while (and tabs (>= (current-column)
			 (woman-get-tab-stop (car tabs))))
      (setq tabs (cdr tabs)))
    (if tabs
	(let* ((tab (car tabs))
	       (type (and (consp tab) (cdr tab)))
	       eol n)
	  (if type
	      (setq tab (woman-get-tab-stop tab)
		    eol (line-end-position)
		    n (save-excursion
			(search-forward "\t" eol t))
		    n (- (if n (1- n) eol) (point))
		    tab (- tab (if (eq type ?C) (/ n 2) n))) )
	  (setq n (- tab (current-column)))
	  (insert-char ?\s n))
      (insert ?\s))))

(defun woman2-DT (to)
  ".DT -- Restore default tabs.  Format paragraphs upto TO.
\(Breaks, but should not.)"
  ;; Currently just terminates special tab processing.
  (setq tab-stop-list nil)
  (woman-delete-line 1)			; ignore any arguments
  (woman2-format-paragraphs to))

(defun woman2-fc (to)
  ".fc a b -- Set field delimiter a and pad character b.
Format paragraphs upto TO.
A VERY FIRST ATTEMPT to make fields at least readable!
Needs doing properly!"
  (if (eolp)
      (woman-delete-whole-line)		; ignore!
    (let ((delim (following-char))
	  (pad ?\s) end)		; pad defaults to space
      (forward-char)
      (skip-chars-forward " \t")
      (or (eolp) (setq pad (following-char)))
      (woman-delete-whole-line)
      (save-excursion
	(if (re-search-forward "^[.'][ \t]*fc\\s " nil t)
	    (setq end (match-beginning 0))))
      ;; A field is contained between a pair of field delimiter
      ;; characters and consists of sub-strings separated by padding
      ;; indicator characters:
      (setq delim (string delim ?\[ ?^ delim ?\] ?* delim))
      (save-excursion
	(while (re-search-forward delim end t)
	  (goto-char (match-beginning 0))
	  (delete-char 1)
	  (insert woman-unpadded-space-char)
	  (goto-char (match-end 0))
	  (delete-char -1)
	  (insert-before-markers woman-unpadded-space-char)
	  (subst-char-in-region
	   (match-beginning 0) (match-end 0)
	   pad woman-unpadded-space-char t)))))
  (woman2-format-paragraphs to))

\f
;;; Preliminary table support (.TS/.TE)

(defun woman2-TS (to)
  ".TS -- Start of table code for the tbl processor.
Format paragraphs upto TO."
  (when woman-emulate-tbl
    ;; Assumes column separator is \t and intercolumn spacing is 3.
    ;; The first line may optionally be a list of options terminated by
    ;; a semicolon.  Currently, just delete it:
    (if (looking-at ".*;[ \t]*$") (woman-delete-line 1)) ;
    ;; The following lines must specify the format of each line of the
    ;; table and end with a period.  Currently, just delete them:
    (while (not (looking-at ".*\\.[ \t]*$")) (woman-delete-line 1))
    (woman-delete-line 1)
    ;; For each column, find its width and align it:
    (let ((start (point)) (col 1))
      (WoMan-log "%s" (buffer-substring start (+ start 40)))
      ;; change T{ T} to tabs
      (while (search-forward "T{\n" to t)
	(replace-match "")
	(catch 'end
	  (while (search-forward "\n" to t)
	    (replace-match " ")
	    (if (looking-at "T}")
		(progn
		  (delete-char 2)
		  (throw 'end t))))))
      (goto-char start)
      ;; strip space and headers
      (while (re-search-forward "^\\.TH\\|\\.sp" to t)
	(woman-delete-whole-line))
      (goto-char start)
      (while (prog1 (search-forward "\t" to t) (goto-char start))
	;; Find current column width:
	(while (< (point) to)
	  (when (search-forward "\t" to t)
	    (backward-char)
	    (if (> (current-column) col) (setq col (current-column))))
	  (forward-line))
	;; Align current column:
	(goto-char start)
	(setq col (+ col 3))		; intercolumn space
	(while (< (point) to)
	  (when (search-forward "\t" to t)
	    (delete-char -1)
	    (insert-char ?\s (- col (current-column))))
	  (forward-line))
	(goto-char start))
      ;; find maximum width
      (let ((max-col 0))
	(while (search-forward "\n" to t)
	  (backward-char)
	  (if (> (current-column) max-col)
	      (setq max-col (current-column)))
	  (forward-char))
	(goto-char start)
	;; break lines if they are too long
	(when (and (> max-col woman-fill-column)
		   (> woman-fill-column col))
	  (setq max-col woman-fill-column)
	  (woman-break-table col to start)
	  (goto-char start))
	(while (re-search-forward "^_$" to t)
	  (replace-match (make-string max-col ?_)))
	(goto-char start))))
  ;; Format table with no filling or adjusting (cf. woman2-nf):
  (setq woman-nofill t)
  (woman2-format-paragraphs to))

(defalias 'woman2-TE 'woman2-fi)
  ;; ".TE -- End of table code for the tbl processor."
  ;; Turn filling and adjusting back on.

(defun woman-break-table (start-column to start)
  (while (< (point) to)
    (move-to-column woman-fill-column)
    (if (eolp)
	(forward-line)
      (if (and (search-backward " " start t)
	       (> (current-column) start-column))
	  (progn
	    (insert-char ?\n 1)
	    (insert-char ?\s (- start-column 5)))
	(forward-line)))))
\f
;;; WoMan message logging:

;; The basis for this logging code was shamelessly pirated from bytecomp.el
;; by Jamie Zawinski <jwz@lucid.com> & Hallvard Furuseth <hbf@ulrik.uio.no>

(defun WoMan-log-begin ()
  "Log the beginning of formatting in *WoMan-Log*."
  (let ((WoMan-current-buffer (buffer-name)))
    (with-current-buffer (get-buffer-create "*WoMan-Log*")
      (or (eq major-mode 'view-mode) (view-mode 1))
      (setq buffer-read-only nil)
      (goto-char (point-max))
      (insert "\n\^L\nFormatting "
	      (if (stringp WoMan-current-file)
		  (concat "file " WoMan-current-file)
		(concat "buffer " WoMan-current-buffer))
	      " at " (current-time-string) "\n")
      (setq WoMan-Log-header-point-max (point-max)))))

(defun WoMan-log (format &rest args)
  "Log a message out of FORMAT control string and optional ARGS."
  (WoMan-log-1 (apply #'format-message format args)))

(defun WoMan-warn (format &rest args)
  "Log a warning message out of FORMAT control string and optional ARGS."
  (setq format (apply #'format-message format args))
  (WoMan-log-1 (concat "**  " format)))

;; request is not used dynamically by any callees.
(defun WoMan-warn-ignored (request ignored)
  "Log a warning message about ignored directive REQUEST.
IGNORED is a string appended to the log message."
  (let ((tail
	 (buffer-substring (point)
			   (line-end-position))))
    (if (and (> (length tail) 0)
	     (/= (string-to-char tail) ?\s))
	(setq tail (concat " " tail)))
    (WoMan-log-1
     (concat "**  " request tail "  request " ignored))))

(defun WoMan-log-end (time)
  "Log the end of formatting in *WoMan-Log*.
TIME specifies the time it took to format the man page, to be printed
with the message."
  (WoMan-log-1 (format "Formatting time %g seconds." time) 'end))

(defun WoMan-log-1 (string &optional end)
  "Log a message STRING in *WoMan-Log*.
If optional argument END is non-nil then make buffer read-only after
logging the message."
  (with-current-buffer (get-buffer-create "*WoMan-Log*")
    (setq buffer-read-only nil)
    (goto-char (point-max))
    (or end (insert "  "))  (insert string "\n")
    (if end
	(setq buffer-read-only t)
      (if woman-show-log
	  (select-window			; to return to
	   (prog1 (selected-window)	; WoMan window
	     (select-window (display-buffer (current-buffer)))
	     (cond (WoMan-Log-header-point-max
		    (goto-char WoMan-Log-header-point-max)
		    (forward-line -1)
		    (recenter 0))))))))
  nil)					; for woman-file-readable-p etc.

;;; Bookmark Woman support.
(declare-function bookmark-make-record-default
                  "bookmark" (&optional no-file no-context posn))
(declare-function bookmark-prop-get "bookmark" (bookmark prop))
(declare-function bookmark-default-handler "bookmark" (bmk))
(declare-function bookmark-get-bookmark-record "bookmark" (bmk))

;; FIXME: woman.el and man.el should be better integrated so, for
;; example, bookmarks of one can be used with the other.

(defun woman-bookmark-make-record ()
  "Make a bookmark entry for a Woman buffer."
  `(,(Man-default-bookmark-title)
    ,@(bookmark-make-record-default 'no-file)
    (location . ,(concat "woman " woman-last-file-name))
    ;; Use the same form as man's bookmarks, as much as possible.
    (man-args . ,woman-last-file-name)
    (handler . woman-bookmark-jump)))

;;;###autoload
(defun woman-bookmark-jump (bookmark)
  "Default bookmark handler for Woman buffers."
  (let* ((file (bookmark-prop-get bookmark 'man-args))
         ;; FIXME: we need woman-find-file-noselect, since
         ;; save-window-excursion can't protect us from the case where
         ;; woman-find-file creates a new frame.
         (buf  (save-window-excursion
                 (woman-find-file file) (current-buffer))))
    (bookmark-default-handler
     `("" (buffer . ,buf) . ,(bookmark-get-bookmark-record bookmark)))))

(provide 'woman)

;;; woman.el ends here

debug log:

solving ebc679a8fc ...
found ebc679a8fc in https://yhetil.org/emacs/2132208036.623612.1605407968985@ichabod.co-bxl/
found 96ae7fe579 in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 96ae7fe5794ded081c0fbb8724ed65c594fe28b0	lisp/woman.el

applying [1/1] https://yhetil.org/emacs/2132208036.623612.1605407968985@ichabod.co-bxl/
diff --git a/lisp/woman.el b/lisp/woman.el
index 96ae7fe579..ebc679a8fc 100644

Checking patch lisp/woman.el...
Applied patch lisp/woman.el cleanly.

index at:
100644 ebc679a8fcd6da0e967413d17a30e9b868034678	lisp/woman.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.