Source

texinfo / texnfo-upd.el

   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
;;; texnfo-upd.el --- utilities for updating nodes and menus in Texinfo files

;; Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.

;; Author: Robert J. Chassell
;; Maintainer: FSF
;; Keywords: maint, tex, docs

;; This file is part of XEmacs.

;; XEmacs 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 2, or (at your option)
;; any later version.

;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; Known bug: update commands fail to ignore @ignore.

;; Summary: how to use the updating commands

;; The node and menu updating functions automatically

;;   * insert missing `@node' lines,
;;   * insert the `Next', `Previous' and `Up' pointers of a node,
;;   * insert or update the menu for a section,
;;   * create a master menu for a Texinfo source file.
;;
;; With a prefix argument, the `texinfo-update-node' and
;; `texinfo-make-menu' functions do their jobs in the region.
;;
;; In brief, the functions for creating or updating nodes and menus, are:
;;
;;     texinfo-update-node (&optional beginning end)
;;     texinfo-every-node-update ()
;;     texinfo-sequential-node-update (&optional region-p)
;;
;;     texinfo-make-menu (&optional beginning end)
;;     texinfo-all-menus-update ()
;;     texinfo-master-menu ()
;;
;;     texinfo-insert-node-lines  (&optional title-p)
;;
;;     texinfo-indent-menu-description (column &optional region-p)

;; The `texinfo-column-for-description' variable specifies the column to
;; which menu descriptions are indented.

;; Texinfo file structure
;; ----------------------

;; To use the updating commands, you must structure your Texinfo file
;; hierarchically.  Each `@node' line, with the exception of the top
;; node, must be accompanied by some kind of section line, such as an
;; `@chapter' or `@section' line.  Each node-line/section-line
;; combination must look like this:

;;      @node    Lists and Tables, Cross References, Structuring, Top
;;      @comment node-name,        next,             previous,    up
;;      @chapter Making Lists and Tables

;; or like this (without the `@comment' line):

;;      @node    Lists and Tables, Cross References, Structuring, Top
;;      @chapter Making Lists and Tables

;; If the file has a `top' node, it must be called `top' or `Top' and
;; be the first node in the file.


;;; The update node functions described in detail

;; The `texinfo-update-node' command with no prefix argument inserts
;; the correct next, previous and up pointers for the node in which
;; point is located (i.e., for the node preceding point).

;; With prefix argument, the `texinfo-update-node' function inserts the
;; correct next, previous and up pointers for the nodes inside the
;; region.

;; It does not matter whether the  `@node' line has pre-existing
;; `Next', `Previous', or `Up' pointers in it.  They are removed.

;; The `texinfo-every-node-update' function runs `texinfo-update-node'
;; on the whole buffer.

;; The `texinfo-sequential-node-update' function inserts the
;; immediately following and preceding node into the `Next' or
;; `Previous' pointers regardless of their hierarchical level.  This is
;; only useful for certain kinds of text, like a novel, which you go
;; through sequentially.


;;; The menu making functions described in detail

;; The `texinfo-make-menu' function without an argument creates or
;; updates a menu for the section encompassing the node that follows
;; point.  With an argument, it makes or updates menus for the nodes
;; within or part of the marked region.

;; Whenever an existing menu is updated, the descriptions from
;; that menu are incorporated into the new menu.  This is done by copying
;; descriptions from the existing menu to the entries in the new menu
;; that have the same node names.  If the node names are different, the
;; descriptions are not copied to the new menu.

;; Menu entries that refer to other Info files are removed since they
;; are not a node within current buffer.  This is a deficiency.

;; The `texinfo-all-menus-update' function runs `texinfo-make-menu'
;; on the whole buffer.

;; The `texinfo-master-menu' function creates an extended menu located
;; after the top node.  (The file must have a top node.)  The function
;; first updates all the regular menus in the buffer (incorporating the
;; descriptions from pre-existing menus), and then constructs a master
;; menu that includes every entry from every other menu.  (However, the
;; function cannot update an already existing master menu; if one
;; exists, it must be removed before calling the function.)

;; The `texinfo-indent-menu-description' function indents every
;; description in the menu following point, to the specified column.
;; Non-nil argument (prefix, if interactive) means indent every
;; description in every menu in the region.  This function does not
;; indent second and subsequent lines of a multi-line description.

;; The `texinfo-insert-node-lines' function inserts `@node' before the
;; `@chapter', `@section', and such like lines of a region in a Texinfo
;; file where the `@node' lines are missing.
;;
;; With a non-nil argument (prefix, if interactive), the function not
;; only inserts `@node' lines but also inserts the chapter or section
;; titles as the names of the corresponding nodes; and inserts titles
;; as node names in pre-existing `@node' lines that lack names.
;;
;; Since node names should be more concise than section or chapter
;; titles, node names so inserted will need to be edited manually.


;;; Code:

(defvar texinfo-master-menu-header
  " --- The Detailed Node Listing ---\n"
  "String inserted before lower level entries in Texinfo master menu.
It comes after the chapter-level menu entries.")

(defun texinfo-make-menu (&optional beginning end)
  "Without any prefix argument, make or update a menu.
Make the menu for the section enclosing the node found following point.

A prefix argument means make or update menus
for nodes within or part of the marked region.

Whenever a menu exists, and is being updated, the descriptions that
are associated with node names in the pre-existing menu are
incorporated into the new menu.  Otherwise, the nodes' section titles
are inserted as descriptions."

  (interactive
   (if prefix-arg
       (list (point) (mark))))
  (if (null beginning)
      (let ((level (texinfo-hierarchic-level)))
        (texinfo-make-one-menu level)
        (message "Menu updated"))
    ;; else
    (message "Making or updating menus in %s... " (buffer-name))
    (save-excursion
      (goto-char (min beginning end))
      ;; find section type following point
      (let ((level (texinfo-hierarchic-level))
	    (region-end-marker (make-marker)))
	(set-marker region-end-marker (max beginning end))
	(save-restriction
	  (widen)

	  (while (texinfo-find-lower-level-node
		  level (marker-position region-end-marker))
	    (setq level (texinfo-hierarchic-level)) ; new, lower level
	    (texinfo-make-one-menu level))

	  (while (and (< (point) (marker-position region-end-marker))
		      (texinfo-find-higher-level-node
		       level (marker-position region-end-marker)))
	    (setq level (texinfo-hierarchic-level))
	    ;; Don't allow texinfo-find-higher-level-node
	    ;; to find the same node again.
	    (forward-line 1)
	    (while (texinfo-find-lower-level-node
		    level (marker-position region-end-marker))
	      (setq level (texinfo-hierarchic-level)) ; new, lower level
	      (texinfo-make-one-menu level))))))
    (message "Making or updating menus in %s...done" (buffer-name))))

(defun texinfo-make-one-menu (level)
  "Make a menu of all the appropriate nodes in this section.
`Appropriate nodes' are those associated with sections that are
at the level specified by LEVEL.  Point is left at the end of menu."
  (let*
      ((case-fold-search t)
       (beginning
	(save-excursion
	  (goto-char (texinfo-update-menu-region-beginning level))
	  (end-of-line)
	  (point)))
       (end (texinfo-update-menu-region-end level))
       (first (texinfo-menu-first-node beginning end))
       (node-name (progn
                    (goto-char beginning)
                    (beginning-of-line)
                    (texinfo-copy-node-name)))
       (new-menu-list (texinfo-make-menu-list beginning end level)))
    (if (texinfo-old-menu-p beginning first)
        (progn
          (texinfo-incorporate-descriptions new-menu-list)
          (texinfo-incorporate-menu-entry-names new-menu-list)
          (texinfo-delete-old-menu beginning first)))
    (texinfo-insert-menu new-menu-list node-name)))

(defun texinfo-all-menus-update (&optional update-all-nodes-p)
  "Update every regular menu in a Texinfo file.
Update pre-existing master menu, if there is one.

If called with a non-nil argument, this function first updates all the
nodes in the buffer before updating the menus."
  (interactive "P")
  (let ((case-fold-search t)
        master-menu-p)
    (save-excursion
      (push-mark (point-max) t)
      (goto-char (point-min))
      (message "Checking for a master menu in %s ... "(buffer-name))
      (save-excursion
        (if (search-forward texinfo-master-menu-header nil t)
            (progn
              ;; Check if @detailmenu kludge is used;
              ;; if so, leave point before @detailmenu.
              (search-backward "\n@detailmenu"
			       (save-excursion (forward-line -3) (point))
			       t)
	      ;; Remove detailed master menu listing
              (setq master-menu-p t)
              (goto-char (match-beginning 0))
              (let ((end-of-detailed-menu-descriptions
                     (save-excursion     ; beginning of end menu line
                       (goto-char (texinfo-menu-end))
                       (beginning-of-line) (forward-char -1)
                       (point))))
                (delete-region (point) end-of-detailed-menu-descriptions)))))

      (if update-all-nodes-p
	  (progn
	    (message "Updating all nodes in %s ... " (buffer-name))
	    (texinfo-update-node (point-min) (point-max))))

      (message "Updating all menus in %s ... " (buffer-name))
      (texinfo-make-menu (point-max) (point-min))

      (if master-menu-p
	  (progn
	    (message "Updating the master menu in %s... " (buffer-name))
	    (texinfo-master-menu nil))))

    (message "Done...updated all the menus.  You may save the buffer.")))

(defun texinfo-find-lower-level-node (level region-end)
  "Search forward from point for node at any level lower than LEVEL.
Search is limited to the end of the marked region, REGION-END,
and to the end of the menu region for the level.

Return t if the node is found, else nil.  Leave point at the beginning
of the node if one is found; else do not move point."
  (let ((case-fold-search t))
    (if (and (< (point) region-end)
             (re-search-forward
              (concat
               "\\(^@node\\).*\n"         ; match node line
               "\\(\\(\\(^@c\\).*\n\\)"   ; match comment line, if any
               "\\|"                      ; or
               "\\(^@ifinfo[ ]*\n\\)\\)?" ; ifinfo line, if any
               (eval (cdr (assoc level texinfo-update-menu-lower-regexps))))
              ;; the next higher level node marks the end of this
              ;; section, and no lower level node will be found beyond
              ;; this position even if region-end is farther off
              (texinfo-update-menu-region-end level)
              t))
        (goto-char (match-beginning 1)))))

(defun texinfo-find-higher-level-node (level region-end)
  "Search forward from point for node at any higher level than argument LEVEL.
Search is limited to the end of the marked region, REGION-END.

Return t if the node is found, else nil.  Leave point at the beginning
of the node if one is found; else do not move point.

A `@node' line starting at point does count as a match;
if the match is found there, the value is t and point does not move."

  (let ((case-fold-search t))
    (cond
     ((or (string-equal "top" level) (string-equal "chapter" level))
      (if (re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)" region-end t)
          (progn (beginning-of-line) t)))
     (t
      (if (re-search-forward
           (concat
            "\\(^@node\\).*\n"              ; match node line
            "\\(\\(\\(^@c\\).*\n\\)"        ; match comment line, if any
            "\\|"                           ; or
            "\\(^@ifinfo[ ]*\n\\)\\)?"      ; ifinfo line, if any
            (eval (cdr (assoc level texinfo-update-menu-higher-regexps))))
           region-end t)
          (progn (beginning-of-line) t))))))


;;; Making the list of new menu entries

(defun texinfo-make-menu-list (beginning end level)
  "Make a list of node names and their descriptions.
Point is left at the end of the menu region, but the menu is not inserted.

First argument is position from which to start making menu list;
second argument is end of region in which to try to locate entries;
third argument is the level of the nodes that are the entries.

Node names and descriptions are dotted pairs of strings.  Each pair is
an element of the list.  If the description does not exist, the
element consists only of the node name."
  (goto-char beginning)
  (let (new-menu-list)
    (while (texinfo-menu-locate-entry-p level end)
      (setq new-menu-list
            (cons (cons
                   (texinfo-copy-node-name)
                   (prog1 "" (forward-line 1)))
                   ;; Use following to insert section titles automatically.
                   ;; (texinfo-copy-section-title))
                  new-menu-list)))
    (reverse new-menu-list)))

(defun texinfo-menu-locate-entry-p (level search-end)
  "Find a node that will be part of menu for this section.
First argument is a string such as \"section\" specifying the general
hierarchical level of the menu; second argument is a position
specifying the end of the search.

The function returns t if the node is found, else nil.  It searches
forward from point, and leaves point at the beginning of the node.

The function finds entries of the same type.  Thus `subsections' and
`unnumberedsubsecs' will appear in the same menu."
  (let ((case-fold-search t))
    (if (re-search-forward
         (concat
          "\\(^@node\\).*\n"              ; match node line
          "\\(\\(\\(^@c\\).*\n\\)"        ; match comment line, if any
          "\\|"                           ; or
          "\\(^@ifinfo[ ]*\n\\)\\)?"      ; ifinfo line, if any
          (eval
           (cdr (assoc level texinfo-update-menu-same-level-regexps))))
         search-end
         t)
        (goto-char (match-beginning 1)))))

(defun texinfo-copy-node-name ()
  "Return the node name as a string.

Start with point at the beginning of the node line; copy the text
after the node command up to the first comma on the line, if any, and
return the text as a string.  Leaves point at the beginning of the
line.  If there is no node name, returns an empty string."

  (save-excursion
    (buffer-substring
     (progn (forward-word 1)              ; skip over node command
            (skip-chars-forward " \t")    ; and over spaces
            (point))
     (if (search-forward
          ","
          (save-excursion (end-of-line) (point)) t) ; bound search
         (1- (point))
       (end-of-line) (point)))))

(defun texinfo-copy-section-title ()
  "Return the title of the section as a string.
The title is used as a description line in the menu when one does not
already exist.

Move point to the beginning of the appropriate section line by going
to the start of the text matched by last regexp searched for, which
must have been done by `texinfo-menu-locate-entry-p'."

  ;; could use the same re-search as in `texinfo-menu-locate-entry-p'
  ;; instead of using `match-beginning'; such a variation would be
  ;; more general, but would waste information already collected

  (goto-char (match-beginning 7))       ; match section name

  (buffer-substring
   (progn (forward-word 1)              ; skip over section type
          (skip-chars-forward " \t")    ; and over spaces
          (point))
   (progn (end-of-line) (point))))


;;; Handling the old menu

(defun texinfo-old-menu-p (beginning first)
  "Move point to the beginning of the menu for this section, if any.
Otherwise move point to the end of the first node of this section.
Return t if a menu is found, nil otherwise.

First argument is the position of the beginning of the section in which
the menu will be located; second argument is the position of the first
node within the section.

If no menu is found, the function inserts two newlines just before the
end of the section, and leaves point there where a menu ought to be."
  (goto-char beginning)
  (if (not (re-search-forward "^@menu" first 'goto-end))
      (progn (insert "\n\n") (forward-line -2) nil)
    t))

(defun texinfo-incorporate-descriptions (new-menu-list)
  "Copy the old menu line descriptions that exist to the new menu.

Point must be at beginning of old menu.

If the node-name of the new menu is found in the old menu, insert the
old description into the new entry.

For this function, the new menu is a list made up of lists of dotted
pairs in which the first element of the pair is the node name and the
second element the description.  The new menu is changed destructively.
The old menu is the menu as it appears in the Texinfo file."

  (let ((new-menu-list-pointer new-menu-list)
        (end-of-menu (texinfo-menu-end)))
    (while new-menu-list
      (save-excursion                   ; keep point at beginning of menu
        (if (re-search-forward
             ;; Existing nodes can have the form
             ;;     * NODE NAME:: DESCRIPTION
             ;; or
             ;;     * MENU ITEM: NODE NAME.     DESCRIPTION.
             ;;
             ;; Recognize both when looking for the description.
             (concat "\\* \\("              ; so only menu entries are found
                     (regexp-quote (car (car new-menu-list))) "::"
                     "\\|"
                     ".*: " (regexp-quote (car (car new-menu-list))) "[.,\t\n]"
                     "\\)"
                     )               ; so only complete entries are found
             end-of-menu
             t)
            (setcdr (car new-menu-list)
                    (texinfo-menu-copy-old-description end-of-menu))))
      (setq new-menu-list (cdr new-menu-list)))
    (setq new-menu-list new-menu-list-pointer)))

(defun texinfo-incorporate-menu-entry-names (new-menu-list)
  "Copy any old menu entry names to the new menu.

Point must be at beginning of old menu.

If the node-name of the new menu entry cannot be found in the old
menu, do nothing.

For this function, the new menu is a list made up of lists of dotted
pairs in which the first element of the pair is the node name and the
second element is the description (or nil).

If we find an existing menu entry name, we change the first element of
the pair to be another dotted pair in which the car is the menu entry
name and the cdr is the node name.

NEW-MENU-LIST is changed destructively.  The old menu is the menu as it
appears in the texinfo file."

  (let ((new-menu-list-pointer new-menu-list)
        (end-of-menu (texinfo-menu-end)))
    (while new-menu-list
      (save-excursion                   ; keep point at beginning of menu
	(if (re-search-forward
	     ;; Existing nodes can have the form
	     ;;     * NODE NAME:: DESCRIPTION
	     ;; or
	     ;;     * MENU ITEM: NODE NAME.     DESCRIPTION.
	     ;;
	     ;; We're interested in the second case.
	     (concat "\\* "              ; so only menu entries are found
		     "\\(.*\\): " (regexp-quote (car (car new-menu-list)))
		     "[.,\t\n]")
	     end-of-menu
	     t)
	    (setcar
	      (car new-menu-list)  ; replace the node name
	      (cons (buffer-substring (match-beginning 1) (match-end 1))
		    (car (car new-menu-list)))))
      (setq new-menu-list (cdr new-menu-list))))
    (setq new-menu-list new-menu-list-pointer)))

(defun texinfo-menu-copy-old-description (end-of-menu)
  "Return description field of old menu line as string.
Point must be located just after the node name.  Point left before description.
Single argument, END-OF-MENU, is position limiting search."
  (skip-chars-forward "[:.,\t\n ]+")
  ;; don't copy a carriage return at line beginning with asterisk!
  ;; do copy a description that begins with an `@'!
  ;; !! Known bug: does not copy descriptions starting with ^|\{?* etc.
  (if (and (looking-at "\\(\\w+\\|@\\)")
           (not (looking-at "\\(^\\* \\|^@end menu\\)")))
      (buffer-substring
       (point)
       (save-excursion
         (re-search-forward "\\(^\\* \\|^@end menu\\)" end-of-menu t)
         (forward-line -1)
         (end-of-line)                  ; go to end of last description line
         (point)))
    ""))

(defun texinfo-menu-end ()
  "Return position of end of menu, but don't move point.
Signal an error if not end of menu."
  (save-excursion
    (if (re-search-forward "^@end menu" nil t)
        (point)
      (error "Menu does not have an end."))))

(defun texinfo-delete-old-menu (beginning first)
  "Delete the old menu.  Point must be in or after menu.
First argument is position of the beginning of the section in which
the menu will be located; second argument is the position of the first
node within the section."
  ;; No third arg to search, so error if search fails.
  (re-search-backward "^@menu" beginning)
  (delete-region (point)
                 (save-excursion
                   (re-search-forward "^@end menu" first)
                   (point))))


;;; Inserting new menu

;; try 32, but perhaps 24 is better
(defvar texinfo-column-for-description 32
  "*Column at which descriptions start in a Texinfo menu.")

(defun texinfo-insert-menu (menu-list node-name)
  "Insert formatted menu at point.
Indents the first line of the description, if any, to the value of
texinfo-column-for-description.

MENU-LIST has form:

    \(\(\"node-name1\" . \"description\"\)
    \(\"node-name2\" . \"description\"\) ... \)

However, the description field might be nil.

Also, the node-name field might itself be a dotted pair (call it P) of
strings instead of just a string.  In that case, the car of P
is the menu entry name, and the cdr of P is the node name."

  (insert "@menu\n")
  (while menu-list
    ;; Every menu entry starts with a star and a space.
    (insert "* ")

    ;; Insert the node name (and menu entry name, if present).
    (let ((node-part (car (car menu-list))))
      (if (stringp node-part)
          ;; "Double colon" entry line; menu entry and node name are the same,
          (insert (format "%s::" node-part))
        ;; "Single colon" entry line; menu entry and node name are different.
        (insert (format "%s: %s." (car node-part) (cdr node-part)))))

    ;; Insert the description, if present.
    (if (cdr (car menu-list))
        (progn
          ;; Move to right place.
          (indent-to texinfo-column-for-description 2)
          ;; Insert description.
          (insert (format "%s" (cdr (car menu-list))))))

    (insert "\n") ; end this menu entry
    (setq menu-list (cdr menu-list)))
  (insert "@end menu")
  (message
   "Updated \"%s\" level menu following node: %s ... " level node-name))


;;; Starting menu descriptions by inserting titles

(defun texinfo-start-menu-description ()
  "In this menu entry, insert the node's section title as a description.
Position point at beginning of description ready for editing.
Do not insert a title if the line contains an existing description.

You will need to edit the inserted text since a useful description
complements the node name rather than repeats it as a title does."

  (interactive)
  (let (beginning end node-name title)
    (save-excursion
    (beginning-of-line)
      (if (search-forward "* " (save-excursion (end-of-line) (point)) t)
          (progn (skip-chars-forward " \t")
                 (setq beginning (point)))
        (error "This is not a line in a menu!"))

      (cond
        ;; "Double colon" entry line; menu entry and node name are the same,
       ((search-forward "::" (save-excursion (end-of-line) (point)) t)
        (if (looking-at "[ \t]*[^ \t\n]+")
            (error "Descriptive text already exists."))
        (skip-chars-backward ": \t")
        (setq node-name (buffer-substring beginning (point))))

       ;; "Single colon" entry line; menu entry and node name are different.
       ((search-forward ":" (save-excursion (end-of-line) (point)) t)
        (skip-chars-forward " \t")
        (setq beginning (point))
        ;; Menu entry line ends in a period, comma, or tab.
        (if (re-search-forward "[.,\t]"
                               (save-excursion (forward-line 1) (point)) t)
            (progn
              (if (looking-at "[ \t]*[^ \t\n]+")
                  (error "Descriptive text already exists."))
              (skip-chars-backward "., \t")
              (setq node-name (buffer-substring beginning (point))))
          ;; Menu entry line ends in a return.
          (re-search-forward ".*\n"
                           (save-excursion (forward-line 1) (point)) t)
          (skip-chars-backward " \t\n")
          (setq node-name (buffer-substring beginning (point)))
          (if (= 0 (length node-name))
              (error "No node name on this line.")
            (insert "."))))
       (t (error "No node name on this line.")))
      ;; Search for node that matches node name, and copy the section title.
      (if (re-search-forward
	   (concat
	    "^@node[ \t]+"
	    (regexp-quote node-name)
	    ".*\n"                             ; match node line
	    "\\("
	    "\\(\\(^@c \\|^@comment\\).*\n\\)" ; match comment line, if any
	    "\\|"                              ; or
	    "\\(^@ifinfo[ ]*\n\\)"             ; ifinfo line, if any
	    "\\)?")
	   nil t)
	  (progn
	    (setq title
		  (buffer-substring
		   ;; skip over section type
		   (progn (forward-word 1)
			  ;; and over spaces
			  (skip-chars-forward " \t")
			  (point))
		   (progn (end-of-line)
			  (skip-chars-backward " \t")
			  (point)))))
	(error "Cannot find node to match node name in menu entry.")))
    ;; Return point to the menu and insert the title.
    (end-of-line)
    (delete-region
     (point)
     (save-excursion (skip-chars-backward " \t") (point)))
    (indent-to texinfo-column-for-description 2)
    (save-excursion (insert title))))


;;; Handling description indentation

;; Since the make-menu functions indent descriptions, these functions
;; are useful primarily for indenting a single menu specially.

(defun texinfo-indent-menu-description (column &optional region-p)
  "Indent every description in menu following point to COLUMN.
Non-nil argument (prefix, if interactive) means indent every
description in every menu in the region.  Does not indent second and
subsequent lines of a multi-line description."

  (interactive
   "nIndent menu descriptions to (column number): \nP")
  (save-excursion
    (save-restriction
      (widen)
      (if (not region-p)
          (progn
            (re-search-forward "^@menu")
            (texinfo-menu-indent-description column)
            (message
             "Indented descriptions in menu.  You may save the buffer."))
        ;;else
        (message "Indenting every menu description in region... ")
        (goto-char (region-beginning))
        (while (and (< (point) (region-end))
                    (texinfo-locate-menu-p))
          (forward-line 1)
          (texinfo-menu-indent-description column))
        (message "Indenting done.  You may save the buffer.")))))

(defun texinfo-menu-indent-description (to-column-number)
  "Indent the Texinfo file menu description to TO-COLUMN-NUMBER.
Start with point just after the word `menu' in the `@menu' line and
leave point on the line before the `@end menu' line.  Does not indent
second and subsequent lines of a multi-line description."
  (let* ((beginning-of-next-line (point)))
    (while (< beginning-of-next-line
              (save-excursion     ; beginning of end menu line
                (goto-char (texinfo-menu-end))
                (beginning-of-line)
                (point)))

      (if (re-search-forward  "\\* \\(.*::\\|.*: [^.,\t\n]+[.,\t]\\)"
           (texinfo-menu-end)
           t)
          (progn
            (let ((beginning-white-space (point)))
              (skip-chars-forward " \t")  ; skip over spaces
              (if (looking-at "\\(@\\|\\w\\)+") ; if there is text
                  (progn
                    ;; remove pre-existing indentation
                    (delete-region beginning-white-space (point))
                    (indent-to-column to-column-number))))))
      ;; position point at beginning of next line
      (forward-line 1)
      (setq beginning-of-next-line (point)))))


;;; Making the master menu

(defun texinfo-master-menu (update-all-nodes-menus-p)
  "Make a master menu for a whole Texinfo file.
Non-nil argument (prefix, if interactive) means first update all
existing nodes and menus.  Remove pre-existing master menu, if there is one.

This function creates a master menu that follows the top node.  The
master menu includes every entry from all the other menus.  It
replaces any existing ordinary menu that follows the top node.

If called with a non-nil argument, this function first updates all the
menus in the buffer (incorporating descriptions from pre-existing
menus) before it constructs the master menu.

The function removes the detailed part of an already existing master
menu.  This action depends on the pre-existing master menu using the
standard `texinfo-master-menu-header'.

The master menu has the following format, which is adapted from the
recommendation in the Texinfo Manual:

   * The first part contains the major nodes in the Texinfo file: the
     nodes for the chapters, chapter-like sections, and the major
     appendices.  This includes the indices, so long as they are in
     chapter-like sections, such as unnumbered sections.

   * The second and subsequent parts contain a listing of the other,
     lower level menus, in order.  This way, an inquirer can go
     directly to a particular node if he or she is searching for
     specific information.

Each of the menus in the detailed node listing is introduced by the
title of the section containing the menu."

  (interactive "P")
  (let ((case-fold-search t))
    (widen)
    (goto-char (point-min))

    ;; Move point to location after `top'.
    (if (not (re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)" nil t))
        (error "This buffer needs a Top node!"))

    (let ((first-chapter
           (save-excursion
             (or (re-search-forward "^@node" nil t)
                 (error "Too few nodes for a master menu!"))
             (point))))
      (if (search-forward texinfo-master-menu-header first-chapter t)
          (progn
            ;; Check if @detailmenu kludge is used;
            ;; if so, leave point before @detailmenu.
            (search-backward "\n@detailmenu"
			     (save-excursion (forward-line -3) (point))
			     t)
	    ;; Remove detailed master menu listing
            (goto-char (match-beginning 0))
            (let ((end-of-detailed-menu-descriptions
                   (save-excursion     ; beginning of end menu line
                     (goto-char (texinfo-menu-end))
                     (beginning-of-line) (forward-char -1)
                     (point))))
              (delete-region (point) end-of-detailed-menu-descriptions)))))

    (if update-all-nodes-menus-p
	(progn
	  (message "Making a master menu in %s ...first updating all nodes... "
		   (buffer-name))
	  (texinfo-update-node (point-min) (point-max))

	  (message "Updating all menus in %s ... " (buffer-name))
	  (texinfo-make-menu (point-min) (point-max))))

    (message "Now making the master menu in %s... " (buffer-name))
    (goto-char (point-min))
    (texinfo-insert-master-menu-list
     (texinfo-master-menu-list))

    ;; Remove extra newlines that texinfo-insert-master-menu-list
    ;; may have inserted.

    (save-excursion
      (goto-char (point-min))

      (if (search-forward texinfo-master-menu-header nil t)
          (progn
            (goto-char (match-beginning 0))
            ;; Check if @detailmenu kludge is used;
            ;; if so, leave point before @detailmenu.
            (search-backward "\n@detailmenu"
			     (save-excursion (forward-line -3) (point))
			     t)
            (insert "\n")
            (delete-blank-lines)
            (goto-char (point-min))))

      (re-search-forward "^@menu")
      (forward-line -1)
      (delete-blank-lines)

      (re-search-forward "^@end menu")
      (forward-line 1)
      (delete-blank-lines))

    (message
     "Done...completed making master menu.  You may save the buffer.")))

(defun texinfo-master-menu-list ()
  "Return a list of menu entries and header lines for the master menu.

Start with the menu for chapters and indices and then find each
following menu and the title of the node preceding that menu.

The master menu list has this form:

    \(\(\(... \"entry-1-2\"  \"entry-1\"\) \"title-1\"\)
      \(\(... \"entry-2-2\"  \"entry-2-1\"\) \"title-2\"\)
      ...\)

However, there does not need to be a title field."

  (let (master-menu-list)
    (while (texinfo-locate-menu-p)
      (setq master-menu-list
            (cons (list
                   (texinfo-copy-menu)
                   (texinfo-copy-menu-title))
                  master-menu-list)))
    (reverse master-menu-list)))

(defun texinfo-insert-master-menu-list (master-menu-list)
  "Format and insert the master menu in the current buffer."
  (goto-char (point-min))
  ;; Insert a master menu only after `Top' node and before next node
  ;; \(or include file if there is no next node\).
  (if (not (re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)" nil t))
      (error "This buffer needs a Top node!"))
  (let ((first-chapter
         (save-excursion (re-search-forward "^@node\\|^@include") (point))))
    (if (not (re-search-forward "^@menu" first-chapter t))
        (error
         "Buffer lacks ordinary `Top' menu in which to insert master.")))
  (beginning-of-line)
  (delete-region      ; buffer must have ordinary top menu
   (point)
   (save-excursion (re-search-forward "^@end menu") (point)))

  (save-excursion
    ;; `master-menu-inserted-p' is a kludge to tell
    ;; whether to insert @end detailmenu (see bleow)
    (let (master-menu-inserted-p)
      ;; Handle top of menu
      (insert "\n@menu\n")
      ;; Insert chapter menu entries
      (setq this-very-menu-list (reverse (car (car master-menu-list))))
      ;; Tell user what is going on.
      (message "Inserting chapter menu entry: %s ... " this-very-menu-list)
      (while this-very-menu-list
        (insert "* " (car this-very-menu-list) "\n")
        (setq this-very-menu-list (cdr this-very-menu-list)))

      (setq master-menu-list (cdr master-menu-list))

      ;; Only insert detailed master menu if there is one....
      (if (car (car master-menu-list))
	  (progn (setq master-menu-inserted-p t)
		 (insert (concat "\n@detailmenu\n"
				 texinfo-master-menu-header))))

      ;; @detailmenu added 5 Sept 1996 to `texinfo-master-menu-header'
      ;; at Karl Berry's request to avert a bug in `makeinfo';
      ;; all agree this is a bad kludge and should eventually be removed.
      ;; @detailmenu ... @end detailmenu is a noop in `texinfmt.el'.
      ;; See @end detailmenu below;
      ;; also see `texinfo-all-menus-update' above, `texinfo-master-menu',
      ;; `texinfo-multiple-files-update'.

      ;; Now, insert all the other menus

      ;; The menu master-menu-list has a form like this:
      ;; ((("beta"  "alpha") "title-A")
      ;;  (("delta" "gamma") "title-B"))

      (while master-menu-list

        (message
         "Inserting menu for %s .... " (car (cdr (car master-menu-list))))
        ;; insert title of menu section
        (insert "\n" (car (cdr (car master-menu-list))) "\n\n")

        ;; insert each menu entry
        (setq this-very-menu-list (reverse (car (car master-menu-list))))
        (while this-very-menu-list
          (insert "* " (car this-very-menu-list) "\n")
          (setq this-very-menu-list (cdr this-very-menu-list)))

        (setq master-menu-list (cdr master-menu-list)))

      ;; Finish menu

      ;; @detailmenu (see note above)
      ;; Only insert @end detailmenu if a master menu was inserted.
      (if master-menu-inserted-p
          (insert "\n@end detailmenu"))
      (insert "\n@end menu\n\n"))))

(defun texinfo-locate-menu-p ()
  "Find the next menu in the texinfo file.
If found, leave point after word `menu' on the `@menu' line, and return t.
If a menu is not found, do not move point and return nil."
  (re-search-forward "\\(^@menu\\)" nil t))

(defun texinfo-copy-menu-title  ()
  "Return the title of the section preceding the menu as a string.
If such a title cannot be found, return an empty string.  Do not move
point."
  (let ((case-fold-search t))
    (save-excursion
      (if (re-search-backward
           (concat
            "\\(^@top"
            "\\|"                         ; or
            texinfo-section-types-regexp  ; all other section types
            "\\)")
           nil
           t)
          (progn
            (beginning-of-line)
            (forward-word 1)              ; skip over section type
            (skip-chars-forward " \t")    ; and over spaces
            (buffer-substring
             (point)
             (progn (end-of-line) (point))))
        ""))))

(defun texinfo-copy-menu ()
  "Return the entries of an existing menu as a list.
Start with point just after the word `menu' in the `@menu' line
and leave point on the line before the `@end menu' line."
  (let* (this-menu-list
         (end-of-menu (texinfo-menu-end)) ; position of end of `@end menu'
         (last-entry (save-excursion      ; position of beginning of
                                          ; last `* ' entry
                      (goto-char end-of-menu)
                      ;; handle multi-line description
                      (if (not (re-search-backward "^\\* " nil t))
                          (error "No entries in menu."))
                      (point))))
    (while (< (point) last-entry)
      (if (re-search-forward  "^\\* " end-of-menu t)
          (progn
            (setq this-menu-list
                  (cons
                   (buffer-substring
                    (point)
                    ;; copy multi-line descriptions
                    (save-excursion
                      (re-search-forward "\\(^\\* \\|^@e\\)" nil t)
                      (- (point) 3)))
                   this-menu-list)))))
    this-menu-list))


;;; Determining the hierarchical level in the texinfo file

(defun texinfo-specific-section-type ()
  "Return the specific type of next section, as a string.
For example, \"unnumberedsubsec\".  Return \"top\" for top node.

Searches forward for a section.  Hence, point must be before the
section whose type will be found.  Does not move point.  Signal an
error if the node is not the top node and a section is not found."
  (let ((case-fold-search t))
    (save-excursion
      (cond
       ((re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)"
;;; Following search limit by cph but causes a bug
;;;			 (save-excursion
;;;			   (end-of-line)
;;;			   (point))
                           nil
                           t)
        "top")
       ((re-search-forward texinfo-section-types-regexp nil t)
        (buffer-substring-no-properties
	 (progn (beginning-of-line) ; copy its name
		(1+ (point)))
	 (progn (forward-word 1)
		(point))))
       (t
        (error
         "texinfo-specific-section-type: Chapter or section not found."))))))

(defun texinfo-hierarchic-level ()
  "Return the general hierarchal level of the next node in a texinfo file.
Thus, a subheading or appendixsubsec is of type subsection."
  (let ((case-fold-search t))
    (cdr (assoc
          (texinfo-specific-section-type)
          texinfo-section-to-generic-alist))))


;;; Locating the major positions

(defun texinfo-update-menu-region-beginning (level)
  "Locate beginning of higher level section this section is within.
Return position of the beginning of the node line; do not move point.
Thus, if this level is subsection, searches backwards for section node.
Only argument is a string of the general type of section."
  (let ((case-fold-search t))
    ;; !! Known bug: if section immediately follows top node, this
    ;; returns the beginning of the buffer as the beginning of the
    ;; higher level section.
    (cond
     ((or (string-equal "top" level)
          (string-equal "chapter" level))
      (save-excursion
        (goto-char (point-min))
        (re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)" nil t)
        (beginning-of-line)
        (point)))
     (t
      (save-excursion
        (re-search-backward
         (concat
          "\\(^@node\\).*\n"              ; match node line
          "\\(\\(\\(^@c\\).*\n\\)"        ; match comment line, if any
          "\\|"                           ; or
          "\\(^@ifinfo[ ]*\n\\)\\)?"      ; ifinfo line, if any
          (eval
           (cdr (assoc level texinfo-update-menu-higher-regexps))))
         nil
         'goto-beginning)
        (point))))))

(defun texinfo-update-menu-region-end (level)
  "Locate end of higher level section this section is within.
Return position; do not move point.  Thus, if this level is a
subsection, find the node for the section this subsection is within.
If level is top or chapter, returns end of file.  Only argument is a
string of the general type of section."
  (let ((case-fold-search t))
    (save-excursion
      (if (re-search-forward
           (concat
            "\\(^@node\\).*\n"            ; match node line
            "\\(\\(\\(^@c\\).*\n\\)"      ; match comment line, if any
            "\\|"                         ; or
            "\\(^@ifinfo[ ]*\n\\)\\)?"    ; ifinfo line, if any
            (eval
             ;; Never finds end of level above chapter so goes to end.
             (cdr (assoc level texinfo-update-menu-higher-regexps))))
           nil
           'goto-end)
          (match-beginning 1)
        (point-max)))))

(defun texinfo-menu-first-node (beginning end)
  "Locate first node of the section the menu will be placed in.
Return position; do not move point.
The menu will be located just before this position.

First argument is the position of the beginning of the section in
which the menu will be located; second argument is the position of the
end of that region; it limits the search."

  (save-excursion
    (goto-char beginning)
    (forward-line 1)
    (re-search-forward "^@node" end t)
    (beginning-of-line)
    (point)))


;;; Alists and regular expressions for defining hierarchical levels

(defvar texinfo-section-to-generic-alist
  '(("top" . "top")

    ("chapter" . "chapter")
    ("unnumbered" . "chapter")
    ("majorheading" . "chapter")
    ("chapheading" . "chapter")
    ("appendix" . "chapter")

    ("section" . "section")
    ("unnumberedsec" . "section")
    ("heading" . "section")
    ("appendixsec" . "section")

    ("subsection" . "subsection")
    ("unnumberedsubsec" . "subsection")
    ("subheading" . "subsection")
    ("appendixsubsec" . "subsection")

    ("subsubsection" . "subsubsection")
    ("unnumberedsubsubsec" . "subsubsection")
    ("subsubheading" . "subsubsection")
    ("appendixsubsubsec" . "subsubsection"))
  "*An alist of specific and corresponding generic Texinfo section types.
The keys are strings specifying specific types of section; the values
are strings of their corresponding general types.")

;; We used to look for just sub, but that found @subtitle.
(defvar texinfo-section-types-regexp
  "^@\\(chapter \\|sect\\|subs\\|subh\\|unnum\\|major\\|chapheading \\|heading \\|appendix\\)"
  "Regexp matching chapter, section, other headings (but not the top node).")

(defvar texinfo-chapter-level-regexp
  "chapter\\|unnumbered \\|appendix \\|majorheading\\|chapheading"
  "Regular expression matching just the Texinfo chapter level headings.")

(defvar texinfo-section-level-regexp
  "section\\|unnumberedsec\\|heading \\|appendixsec"
  "Regular expression matching just the Texinfo section level headings.")

(defvar texinfo-subsection-level-regexp
  "subsection\\|unnumberedsubsec\\|subheading\\|appendixsubsec"
  "Regular expression matching just the Texinfo subsection level headings.")

(defvar texinfo-subsubsection-level-regexp
  "subsubsection\\|unnumberedsubsubsec\\|subsubheading\\|appendixsubsubsec"
  "Regular expression matching just the Texinfo subsubsection level headings.")

(defvar texinfo-update-menu-same-level-regexps
  '(("top" . "top[ \t]+")
    ("chapter" .
     (concat "\\(^@\\)\\(" texinfo-chapter-level-regexp "\\)[ \t]*"))
    ("section" .
     (concat "\\(^@\\)\\(" texinfo-section-level-regexp "\\)[ \t]*"))
    ("subsection" .
     (concat "\\(^@\\)\\(" texinfo-subsection-level-regexp "\\)[ \t]+"))
    ("subsubsection" .
     (concat "\\(^@\\)\\(" texinfo-subsubsection-level-regexp "\\)[ \t]+")))
  "*Regexps for searching for same level sections in a Texinfo file.
The keys are strings specifying the general hierarchical level in the
document; the values are regular expressions.")

(defvar texinfo-update-menu-higher-regexps
  '(("top" . "^@node [ \t]*DIR")
    ("chapter" . "^@node [ \t]*top[ \t]*\\(,\\|$\\)")
    ("section" .
     (concat
      "\\(^@\\("
      texinfo-chapter-level-regexp
      "\\)[ \t]*\\)"))
    ("subsection" .
     (concat
      "\\(^@\\("
      texinfo-section-level-regexp
      "\\|"
      texinfo-chapter-level-regexp
      "\\)[ \t]*\\)"))
    ("subsubsection" .
     (concat
      "\\(^@\\("
      texinfo-subsection-level-regexp
      "\\|"
      texinfo-section-level-regexp
      "\\|"
      texinfo-chapter-level-regexp
      "\\)[ \t]*\\)")))
  "*Regexps for searching for higher level sections in a Texinfo file.
The keys are strings specifying the general hierarchical level in the
document; the values are regular expressions.")

(defvar texinfo-update-menu-lower-regexps
  '(("top" .
     (concat
      "\\(^@\\("
      texinfo-chapter-level-regexp
      "\\|"
      texinfo-section-level-regexp
      "\\|"
      texinfo-subsection-level-regexp
      "\\|"
      texinfo-subsubsection-level-regexp
      "\\)[ \t]*\\)"))
    ("chapter" .
     (concat
      "\\(^@\\("
      texinfo-section-level-regexp
      "\\|"
      texinfo-subsection-level-regexp
      "\\|"
      texinfo-subsubsection-level-regexp
      "\\)[ \t]*\\)"))
    ("section" .
     (concat
      "\\(^@\\("
      texinfo-subsection-level-regexp
      "\\|"
      texinfo-subsubsection-level-regexp
      "\\)[ \t]+\\)"))
    ("subsection" .
     (concat
      "\\(^@\\("
      texinfo-subsubsection-level-regexp
      "\\)[ \t]+\\)"))
    ("subsubsection" . "nothing lower"))
  "*Regexps for searching for lower level sections in a Texinfo file.
The keys are strings specifying the general hierarchical level in the
document; the values are regular expressions.")


;;; Updating a node

;;;###autoload
(defun texinfo-update-node (&optional beginning end)
  "Without any prefix argument, update the node in which point is located.
Interactively, a prefix argument means to operate on the region.

The functions for creating or updating nodes and menus, and their
keybindings, are:

    texinfo-update-node (&optional beginning end)    \\[texinfo-update-node]
    texinfo-every-node-update ()                \\[texinfo-every-node-update]
    texinfo-sequential-node-update (&optional region-p)

    texinfo-make-menu (&optional region-p)      \\[texinfo-make-menu]
    texinfo-all-menus-update ()                 \\[texinfo-all-menus-update]
    texinfo-master-menu ()

    texinfo-indent-menu-description (column &optional region-p)

The `texinfo-column-for-description' variable specifies the column to
which menu descriptions are indented. Its default value is 32."

  (interactive
   (if prefix-arg
       (list (point) (mark))))
  (if (null beginning)
      ;; Update a single node.
      (let ((auto-fill-function nil) (auto-fill-hook nil))
        (if (not (re-search-backward "^@node" (point-min) t))
            (error "Node line not found before this position"))
        (texinfo-update-the-node)
        (message "Done...updated the node.  You may save the buffer."))
    ;; else
    (let ((auto-fill-function nil)
	  (auto-fill-hook nil))
      (save-excursion
	(save-restriction
	  (narrow-to-region beginning end)
	  (goto-char (point-min))
	  (while (re-search-forward "^@node" (point-max) t)
	    (beginning-of-line)
	    (texinfo-update-the-node))
	  (goto-char (point-max))
	  (message "Done...nodes updated in region.  You may save the buffer."))))))

;;;###autoload
(defun texinfo-every-node-update ()
  "Update every node in a Texinfo file."
  (interactive)
  (save-excursion
    (texinfo-update-node (point-min) (point-max))
    (message "Done...updated every node.       You may save the buffer.")))

(defun texinfo-update-the-node ()
  "Update one node.  Point must be at the beginning of node line.
Leave point at the end of the node line."
  (texinfo-check-for-node-name)
  (texinfo-delete-existing-pointers)
  (message "Updating node: %s ... " (texinfo-copy-node-name))
  (save-restriction
    (widen)
    (let*
        ((case-fold-search t)
         (level (texinfo-hierarchic-level))
         (beginning (texinfo-update-menu-region-beginning level))
         (end (texinfo-update-menu-region-end level)))
      (if (string-equal level "top")
          (texinfo-top-pointer-case)
        ;; else
        (texinfo-insert-pointer beginning end level 'next)
        (texinfo-insert-pointer beginning end level 'previous)
        (texinfo-insert-pointer beginning end level 'up)
        (texinfo-clean-up-node-line)))))

(defun texinfo-top-pointer-case ()
  "Insert pointers in the Top node.  This is a special case.

The `Next' pointer is a pointer to a chapter or section at a lower
hierarchical level in the file.  The `Previous' and `Up' pointers are
to `(dir)'.  Point must be at the beginning of the node line, and is
left at the end of the node line."

  (texinfo-clean-up-node-line)
  (insert ", "
          (save-excursion
            ;; There may be an @chapter or other such command between
            ;; the top node line and the next node line, as a title
            ;; for an `ifinfo' section. This @chapter command must
            ;; must be skipped.  So the procedure is to search for
            ;; the next `@node' line, and then copy its name.
            (if (re-search-forward "^@node" nil t)
                (progn
                  (beginning-of-line)
                  (texinfo-copy-node-name))
              " "))
          ", (dir), (dir)"))

(defun texinfo-check-for-node-name ()
  "Determine whether the node has a node name.  Prompt for one if not.
Point must be at beginning of node line.  Does not move point."
  (save-excursion
    (let ((initial (texinfo-copy-next-section-title)))
      ;; This is not clean.  Use `interactive' to read the arg.
      (forward-word 1)                    ; skip over node command
      (skip-chars-forward " \t")          ; and over spaces
      (if (not (looking-at "[^,\t\n ]+")) ; regexp based on what Info looks for
                                          ; alternatively, use "[a-zA-Z]+"
        (let ((node-name
               (read-from-minibuffer
                "Node name (use no @, commas, colons, or apostrophes): "
                initial)))
          (insert " " node-name))))))

(defun texinfo-delete-existing-pointers ()
  "Delete `Next', `Previous', and `Up' pointers.
Starts from the current position of the cursor, and searches forward
on the line for a comma and if one is found, deletes the rest of the
line, including the comma.  Leaves point at beginning of line."
  (let ((eol-point (save-excursion (end-of-line) (point))))
    (if (search-forward "," eol-point t)
        (delete-region (1- (point)) eol-point)))
  (beginning-of-line))

(defun texinfo-find-pointer (beginning end level direction)
  "Move point to section associated with next, previous, or up pointer.
Return type of pointer (either `normal' or `no-pointer').

The first and second arguments bound the search for a pointer to the
beginning and end, respectively, of the enclosing higher level
section.  The third argument is a string specifying the general kind
of section such as \"chapter\" or \"section\".  When looking for the
`Next' pointer, the section found will be at the same hierarchical
level in the Texinfo file; when looking for the `Previous' pointer,
the section found will be at the same or higher hierarchical level in
the Texinfo file; when looking for the `Up' pointer, the section found
will be at some level higher in the Texinfo file.  The fourth argument
\(one of 'next, 'previous, or 'up\) specifies whether to find the
`Next', `Previous', or `Up' pointer."
  (let ((case-fold-search t))
    (cond ((eq direction 'next)
           (forward-line 3)             ; skip over current node
           ;; Search for section commands accompanied by node lines;
           ;; ignore section commands in the middle of nodes.
           (if (re-search-forward
                ;; A `Top' node is never a next pointer, so won't find it.
                (concat
                 ;; Match node line.
                 "\\(^@node\\).*\n"
                 ;; Match comment or ifinfo line, if any
                 "\\(\\(\\(^@c\\).*\n\\)\\|\\(^@ifinfo[ ]*\n\\)\\)?"
                 (eval
                  (cdr (assoc level texinfo-update-menu-same-level-regexps))))
                end
                t)
               'normal
             'no-pointer))
          ((eq direction 'previous)
           (if (re-search-backward
                (concat
                 "\\("
                 ;; Match node line.
                 "\\(^@node\\).*\n"
                 ;; Match comment or ifinfo line, if any
                 "\\(\\(\\(^@c\\).*\n\\)\\|\\(^@ifinfo[ ]*\n\\)\\)?"
                 (eval
                  (cdr (assoc level texinfo-update-menu-same-level-regexps)))
                 "\\|"
                 ;; Match node line.
                 "\\(^@node\\).*\n"
                 ;; Match comment or ifinfo line, if any
                 "\\(\\(\\(^@c\\).*\n\\)\\|\\(^@ifinfo[ ]*\n\\)\\)?"
                 (eval
                  (cdr (assoc level texinfo-update-menu-higher-regexps)))
                 "\\|"
                 ;; Handle `Top' node specially.
                 "^@node [ \t]*top[ \t]*\\(,\\|$\\)"
                 "\\)")
                beginning
                t)
               'normal
             'no-pointer))
          ((eq direction 'up)
           (if (re-search-backward
                (concat
                 "\\("
                 ;; Match node line.
                 "\\(^@node\\).*\n"
                 ;; Match comment or ifinfo line, if any
                 "\\(\\(\\(^@c\\).*\n\\)\\|\\(^@ifinfo[ ]*\n\\)\\)?"
                 (eval (cdr (assoc level texinfo-update-menu-higher-regexps)))
                 "\\|"
                 ;; Handle `Top' node specially.
                 "^@node [ \t]*top[ \t]*\\(,\\|$\\)"
                 "\\)")
                (save-excursion
                  (goto-char beginning)
                  (beginning-of-line)
                  (point))
                t)
               'normal
             'no-pointer))
          (t
           (error "texinfo-find-pointer: lack proper arguments")))))

(defun texinfo-pointer-name (kind)
  "Return the node name preceding the section command.
The argument is the kind of section, either `normal' or `no-pointer'."
  (let (name)
    (cond ((eq kind 'normal)
           (end-of-line)                ; this handles prev node top case
           (re-search-backward          ; when point is already
            "^@node"                    ; at the beginning of @node line
            (save-excursion (forward-line -3))
            t)
           (setq name (texinfo-copy-node-name)))
	  ((eq kind 'no-pointer)
           ;; Don't need to put a blank in the pointer slot,
           ;; since insert "' " always has a space
	   (setq name " ")))	; put a blank in the pointer slot
    name))

(defun texinfo-insert-pointer (beginning end level direction)
  "Insert the `Next', `Previous' or `Up' node name at point.
Move point forward.

The first and second arguments bound the search for a pointer to the
beginning and end, respectively, of the enclosing higher level
section.  The third argument is the hierarchical level of the Texinfo
file, a string such as \"section\".  The fourth argument is direction
towards which the pointer is directed, one of `next', `previous', or `up'."

  (end-of-line)
  (insert
   ", "
   (save-excursion
     (texinfo-pointer-name
      (texinfo-find-pointer beginning end level direction)))))

(defun texinfo-clean-up-node-line ()
  "Remove extra commas, if any, at end of node line."
  (end-of-line)
  (skip-chars-backward ", ")
  (delete-region (point) (save-excursion (end-of-line) (point))))


;;; Updating nodes sequentially
;; These sequential update functions insert `Next' or `Previous'
;; pointers that point to the following or preceding nodes even if they
;; are at higher or lower hierarchical levels.  This means that if a
;; section contains one or more subsections, the section's `Next'
;; pointer will point to the subsection and not the following section.
;; (The subsection to which `Next' points will most likely be the first
;; item on the section's menu.)

;;;###autoload
(defun texinfo-sequential-node-update (&optional region-p)
  "Update one node (or many) in a Texinfo file with sequential pointers.

This function causes the `Next' or `Previous' pointer to point to the
immediately preceding or following node, even if it is at a higher or
lower hierarchical level in the document.  Continually pressing `n' or
`p' takes you straight through the file.

Without any prefix argument, update the node in which point is located.
Non-nil argument (prefix, if interactive) means update the nodes in the
marked region.

This command makes it awkward to navigate among sections and
subsections; it should be used only for those documents that are meant
to be read like a novel rather than a reference, and for which the
Info `g*' command is inadequate."

  (interactive "P")
  (if (not region-p)
      ;; update a single node
      (let ((auto-fill-function nil) (auto-fill-hook nil))
        (if (not (re-search-backward "^@node" (point-min) t))
            (error "Node line not found before this position."))
        (texinfo-sequentially-update-the-node)
        (message
         "Done...sequentially updated the node .  You may save the buffer."))
    ;; else
    (let ((auto-fill-function nil)
	  (auto-fill-hook nil)
          (beginning (region-beginning))
          (end (region-end)))
      (if (= end beginning)
          (error "Please mark a region!"))
      (save-restriction
        (narrow-to-region beginning end)
        (goto-char beginning)
        (push-mark (point) t)
        (while (re-search-forward "^@node" (point-max) t)
          (beginning-of-line)
          (texinfo-sequentially-update-the-node))
        (message
         "Done...updated the nodes in sequence.  You may save the buffer.")))))

(defun texinfo-sequentially-update-the-node ()
  "Update one node such that the pointers are sequential.
A `Next' or `Previous' pointer points to any preceding or following node,
regardless of its hierarchical level."

        (texinfo-check-for-node-name)
        (texinfo-delete-existing-pointers)
        (message
         "Sequentially updating node: %s ... " (texinfo-copy-node-name))
        (save-restriction
          (widen)
          (let*
              ((case-fold-search t)
               (level (texinfo-hierarchic-level)))
            (if (string-equal level "top")
                (texinfo-top-pointer-case)
              ;; else
              (texinfo-sequentially-insert-pointer level 'next)
              (texinfo-sequentially-insert-pointer level 'previous)
              (texinfo-sequentially-insert-pointer level 'up)
              (texinfo-clean-up-node-line)))))

(defun texinfo-sequentially-find-pointer (level direction)
  "Find next or previous pointer sequentially in Texinfo file, or up pointer.
Move point to section associated with the pointer.  Find point even if
it is in a different section.

Return type of pointer (either `normal' or `no-pointer').

The first argument is a string specifying the general kind of section
such as \"chapter\" or \"section\".  The section found will be at the
same hierarchical level in the Texinfo file, or, in the case of the up
pointer, some level higher.  The second argument (one of `next',
`previous', or `up') specifies whether to find the `Next', `Previous',
or `Up' pointer."
  (let ((case-fold-search t))
    (cond ((eq direction 'next)
           (forward-line 3)             ; skip over current node
           (if (re-search-forward
                texinfo-section-types-regexp
                (point-max)
                t)
               'normal
             'no-pointer))
          ((eq direction 'previous)
           (if (re-search-backward
                texinfo-section-types-regexp
                (point-min)
                t)
               'normal
             'no-pointer))
          ((eq direction 'up)
           (if (re-search-backward
                (eval (cdr (assoc level texinfo-update-menu-higher-regexps)))
                beginning
                t)
               'normal
             'no-pointer))
          (t
           (error "texinfo-sequential-find-pointer: lack proper arguments")))))

(defun texinfo-sequentially-insert-pointer (level direction)
  "Insert the `Next', `Previous' or `Up' node name at point.
Move point forward.

The first argument is the hierarchical level of the Texinfo file, a
string such as \"section\".  The second argument is direction, one of
`next', `previous', or `up'."

  (end-of-line)
  (insert
   ", "
   (save-excursion
     (texinfo-pointer-name
      (texinfo-sequentially-find-pointer level direction)))))


;;; Inserting `@node' lines
;; The `texinfo-insert-node-lines' function inserts `@node' lines as needed
;; before the `@chapter', `@section', and such like lines of a region
;; in a Texinfo file.

(defun texinfo-insert-node-lines (beginning end &optional title-p)
  "Insert missing `@node' lines in region of Texinfo file.
Non-nil argument (prefix, if interactive) means also to insert the
section titles as node names; and also to insert the section titles as
node names in pre-existing `@node' lines that lack names."
  (interactive "r\nP")

  ;; Use marker; after inserting node lines, leave point at end of
  ;; region and mark at beginning.

  (let (beginning-marker end-marker title last-section-position)

    ;; Save current position on mark ring and set mark to end.
    (push-mark end t)
    (setq end-marker (mark-marker))

    (goto-char beginning)
    (while (re-search-forward
            texinfo-section-types-regexp
            end-marker
            'end)
      ;; Copy title if desired.
      (if title-p
          (progn
            (beginning-of-line)
            (forward-word 1)
            (skip-chars-forward " \t")
            (setq title (buffer-substring
                         (point)
                         (save-excursion (end-of-line) (point))))))
      ;; Insert node line if necessary.
      (if (re-search-backward
           "^@node"
           ;; Avoid finding previous node line if node lines are close.
           (or last-section-position
               (save-excursion (forward-line -2) (point))) t)
          ;;  @node is present, and point at beginning of that line
          (forward-word 1)          ; Leave point just after @node.
        ;; Else @node missing; insert one.
        (beginning-of-line)         ; Beginning of `@section' line.
        (insert "@node\n")
        (backward-char 1))          ; Leave point just after `@node'.
      ;; Insert title if desired.
      (if title-p
          (progn
            (skip-chars-forward " \t")
            ;; Use regexp based on what info looks for
            ;; (alternatively, use "[a-zA-Z]+");
            ;; this means we only insert a title if none exists.
            (if (not (looking-at "[^,\t\n ]+"))
                (progn
                  (beginning-of-line)
                  (forward-word 1)
                  (insert " " title)
                  (message "Inserted title %s ... " title)))))
      ;; Go forward beyond current section title.
      (re-search-forward texinfo-section-types-regexp
                         (save-excursion (forward-line 3) (point)) t)
      (setq last-section-position (point))
      (forward-line 1))

    ;; Leave point at end of region, mark at beginning.
    (set-mark beginning)

    (if title-p
      (message
       "Done inserting node lines and titles.  You may save the buffer.")
    (message "Done inserting node lines.  You may save the buffer."))))


;;; Update and create menus for multi-file Texinfo sources

;;  1. M-x texinfo-multiple-files-update
;;
;;     Read the include file list of an outer Texinfo file and
;;     update all highest level nodes in the files listed and insert a
;;     main menu in the outer file after its top node.

;;  2. C-u M-x texinfo-multiple-files-update
;;
;;     Same as 1, but insert a master menu.  (Saves reupdating lower
;;     level menus and nodes.)  This command simply reads every menu,
;;     so if the menus are wrong, the master menu will be wrong.
;;     Similarly, if the lower level node pointers are wrong, they
;;     will stay wrong.

;;  3. C-u 2 M-x texinfo-multiple-files-update
;;
;;     Read the include file list of an outer Texinfo file and
;;     update all nodes and menus in the files listed and insert a
;;     master menu in the outer file after its top node.

;;; Note: these functions:
;;;
;;;   * Do not save or delete any buffers.  You may fill up your memory.
;;;   * Do not handle any pre-existing nodes in outer file.
;;;     Hence, you may need a file for indices.


;;; Auxiliary functions for multiple file updating

(defun texinfo-multi-file-included-list (outer-file)
  "Return a list of the included files in OUTER-FILE."
  (let ((included-file-list (list outer-file))
        start)
    (save-excursion
      (switch-to-buffer (find-file-noselect outer-file))
      (widen)
      (goto-char (point-min))
      (while (re-search-forward "^@include" nil t)
        (skip-chars-forward " \t")
        (setq start (point))
        (end-of-line)
        (skip-chars-backward " \t")
        (setq included-file-list
              (cons (buffer-substring start (point))
                    included-file-list)))
      (nreverse included-file-list))))

(defun texinfo-copy-next-section-title ()
  "Return the name of the immediately following section as a string.

Start with point at the beginning of the node line.  Leave point at the
same place.  If there is no title, returns an empty string."

  (save-excursion
    (end-of-line)
    (let ((node-end (or
                        (save-excursion
                          (if (re-search-forward "\\(^@node\\)" nil t)
                              (match-beginning 0)))
                        (point-max))))
      (if (re-search-forward texinfo-section-types-regexp node-end t)
          (progn
            (beginning-of-line)
            ;; copy title
            (let ((title
                   (buffer-substring
                    (progn (forward-word 1)           ; skip over section type
                           (skip-chars-forward " \t") ; and over spaces
                           (point))
                    (progn (end-of-line) (point)))))
              title))
        ""))))

(defun texinfo-multi-file-update (files &optional update-everything)
  "Update first node pointers in each file in FILES.
Return a list of the node names.

The first file in the list is an outer file; the remaining are
files included in the outer file with `@include' commands.

If optional arg UPDATE-EVERYTHING non-nil, update every menu and
pointer in each of the included files.

Also update the `Top' level node pointers of the outer file.

Requirements:

  * the first file in the FILES list must be the outer file,
  * each of the included files must contain exactly one highest
    hierarchical level node,
  * this node must be the first node in the included file,
  * each highest hierarchical level node must be of the same type.

Thus, normally, each included file contains one, and only one, chapter."

;; The menu-list has the form:
;;
;;     \(\(\"node-name1\" . \"title1\"\)
;;       \(\"node-name2\" . \"title2\"\) ... \)
;;
;; However, there does not need to be a title field and this function
;; does not fill it; however a comment tells you how to do so.
;; You would use the title field if you wanted to insert titles in the
;; description slot of a menu as a description.

  (let ((case-fold-search t)
        menu-list)

    ;; Find the name of the first node of the first included file.
    (switch-to-buffer (find-file-noselect (car (cdr files))))
    (widen)
    (goto-char (point-min))
    (if (not (re-search-forward "^@node" nil t))
        (error "No `@node' line found in %s !" (buffer-name)))
    (beginning-of-line)
    (texinfo-check-for-node-name)
    (setq next-node-name (texinfo-copy-node-name))

    (setq menu-list
          (cons (cons
                 next-node-name
                 (prog1 "" (forward-line 1)))
                ;; Use following to insert section titles automatically.
                ;; (texinfo-copy-next-section-title)
                menu-list))

    ;; Go to outer file
    (switch-to-buffer (find-file-noselect (car files)))
    (goto-char (point-min))
    (if (not (re-search-forward "^@node [ \t]*top[ \t]*\\(,\\|$\\)" nil t))
        (error "This buffer needs a Top node!"))
    (beginning-of-line)
    (texinfo-delete-existing-pointers)
    (end-of-line)
    (insert ", " next-node-name ", (dir), (dir)")
    (beginning-of-line)
    (setq previous-node-name "Top")
    (setq files (cdr files))

    (while files

      (if (not (cdr files))
          ;; No next file
          (setq next-node-name "")
        ;; Else,
        ;; find the name of the first node in the next file.
        (switch-to-buffer (find-file-noselect (car (cdr files))))
        (widen)
        (goto-char (point-min))
        (if (not (re-search-forward "^@node" nil t))
            (error "No `@node' line found in %s !" (buffer-name)))
        (beginning-of-line)
        (texinfo-check-for-node-name)
        (setq next-node-name (texinfo-copy-node-name))
        (setq menu-list
              (cons (cons
                     next-node-name
                     (prog1 "" (forward-line 1)))
                    ;; Use following to insert section titles automatically.
                    ;; (texinfo-copy-next-section-title)
                    menu-list)))

      ;; Go to node to be updated.
      (switch-to-buffer (find-file-noselect (car files)))
      (goto-char (point-min))
      (if (not (re-search-forward "^@node" nil t))
          (error "No `@node' line found in %s !" (buffer-name)))
      (beginning-of-line)

      ;; Update other menus and nodes if requested.
      (if update-everything (texinfo-all-menus-update t))

      (beginning-of-line)
      (texinfo-delete-existing-pointers)
      (end-of-line)
      (insert ", " next-node-name ", " previous-node-name ", " up-node-name)

      (beginning-of-line)
      (setq previous-node-name (texinfo-copy-node-name))

      (setq files (cdr files)))
    (nreverse menu-list)))

(defun texinfo-multi-files-insert-main-menu (menu-list)
  "Insert formatted main menu at point.
Indents the first line of the description, if any, to the value of
`texinfo-column-for-description'."

  (insert "@menu\n")
  (while menu-list
    ;; Every menu entry starts with a star and a space.
    (insert "* ")

    ;; Insert the node name (and menu entry name, if present).
    (let ((node-part (car (car menu-list))))
      (if (stringp node-part)
          ;; "Double colon" entry line; menu entry and node name are the same,
          (insert (format "%s::" node-part))
        ;; "Single colon" entry line; menu entry and node name are different.
        (insert (format "%s: %s." (car node-part) (cdr node-part)))))

    ;; Insert the description, if present.
    (if (cdr (car menu-list))
        (progn
          ;; Move to right place.
          (indent-to texinfo-column-for-description 2)
          ;; Insert description.
          (insert (format "%s" (cdr (car menu-list))))))

    (insert "\n") ; end this menu entry
    (setq menu-list (cdr menu-list)))
  (insert "@end menu"))

(defun texinfo-multi-file-master-menu-list (files-list)
  "Return master menu list from files in FILES-LIST.
Menu entries in each file collected using `texinfo-master-menu-list'.

The first file in FILES-LIST must be the outer file; the others must
be the files included within it.  A main menu must already exist."
  (save-excursion
    (let (master-menu-list)
      (while files-list
        (switch-to-buffer (find-file-noselect (car files-list)))
        (message "Working on: %s " (current-buffer))
        (goto-char (point-min))
        (setq master-menu-list
              (append master-menu-list (texinfo-master-menu-list)))
        (setq files-list (cdr files-list)))
      master-menu-list)))


;;; The multiple-file update function

(defun texinfo-multiple-files-update
  (outer-file &optional update-everything make-master-menu)
  "Update first node pointers in each file included in OUTER-FILE;
create or update the `Top' level node pointers and the main menu in
the outer file that refers to such nodes.  This does not create or
update menus or pointers within the included files.

With optional MAKE-MASTER-MENU argument (prefix arg, if interactive),
insert a master menu in OUTER-FILE in addition to creating or updating
pointers in the first @node line in each included file and creating or
updating the `Top' level node pointers of the outer file.  This does
not create or update other menus and pointers within the included
files.

With optional UPDATE-EVERYTHING argument (numeric prefix arg, if
interactive), update all the menus and all the `Next', `Previous', and
`Up' pointers of all the files included in OUTER-FILE before inserting
a master menu in OUTER-FILE.  Also, update the `Top' level node
pointers of OUTER-FILE.

Notes:

  * this command does NOT save any files--you must save the
    outer file and any modified, included files.

  * except for the `Top' node, this command does NOT handle any
    pre-existing nodes in the outer file; hence, indices must be
    enclosed in an included file.

Requirements:

  * each of the included files must contain exactly one highest
    hierarchical level node,
  * this highest node must be the first node in the included file,
  * each highest hierarchical level node must be of the same type.

Thus, normally, each included file contains one, and only one,
chapter."

  (interactive (cons
                (read-string
                 "Name of outer `include' file: "
                 (buffer-file-name))
                (cond ((not current-prefix-arg)
                       '(nil nil))
                      ((listp current-prefix-arg)
                       '(t nil))   ; make-master-menu
                      ((numberp current-prefix-arg)
                       '(t t))     ; update-everything
                      )))

  (let* ((included-file-list (texinfo-multi-file-included-list outer-file))
         (files included-file-list)
         main-menu-list
         next-node-name
         previous-node-name
         (up-node-name "Top"))

;;; Update the pointers
;;; and collect the names of the nodes and titles
    (setq main-menu-list (texinfo-multi-file-update files update-everything))

;;; Insert main menu

  ;; Go to outer file
  (switch-to-buffer (find-file-noselect (car included-file-list)))
  (if (texinfo-old-menu-p
       (point-min)
       (save-excursion
         (re-search-forward "^@include")
         (beginning-of-line)
         (point)))

      ;; If found, leave point after word `menu' on the `@menu' line.
      (progn
        (texinfo-incorporate-descriptions main-menu-list)
        ;; Delete existing menu.
        (beginning-of-line)
        (delete-region
         (point)
         (save-excursion (re-search-forward "^@end menu") (point)))
        ;; Insert main menu
        (texinfo-multi-files-insert-main-menu main-menu-list))

    ;; Else no current menu; insert it before `@include'
    (texinfo-multi-files-insert-main-menu main-menu-list))

;;; Insert master menu

  (if make-master-menu
      (progn
        ;; First, removing detailed part of any pre-existing master menu
        (goto-char (point-min))
        (if (search-forward texinfo-master-menu-header nil t)
            (progn
              (goto-char (match-beginning 0))
	      ;; Check if @detailmenu kludge is used;
	      ;; if so, leave point before @detailmenu.
	      (search-backward "\n@detailmenu"
			       (save-excursion (forward-line -3) (point))
			       t)
	      ;; Remove detailed master menu listing
              (let ((end-of-detailed-menu-descriptions
                     (save-excursion     ; beginning of end menu line
                       (goto-char (texinfo-menu-end))
                       (beginning-of-line) (forward-char -1)
                       (point))))
                (delete-region (point) end-of-detailed-menu-descriptions))))

        ;; Create a master menu and insert it
        (texinfo-insert-master-menu-list
         (texinfo-multi-file-master-menu-list
          included-file-list)))))

  ;; Remove unwanted extra lines.
  (save-excursion
    (goto-char (point-min))

    (re-search-forward "^@menu")
    (forward-line -1)
    (insert  "\n") ; Ensure at least one blank line.
    (delete-blank-lines)

    (re-search-forward "^@end menu")
    (forward-line 1)
    (insert  "\n") ; Ensure at least one blank line.
    (delete-blank-lines))

  (message "Multiple files updated."))


;;; Place `provide' at end of file.
(provide 'texnfo-upd)

;;; texnfo-upd.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.