unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob ce788207cf5d8d98cd810b1673915c68427a905c 102412 bytes (raw)
name: lisp/textmodes/flyspell.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
 
;;; flyspell.el --- On-the-fly spell checker  -*- lexical-binding:t -*-

;; Copyright (C) 1998, 2000-2019 Free Software Foundation, Inc.

;; Author: Manuel Serrano <Manuel.Serrano@sophia.inria.fr>
;; Maintainer: emacs-devel@gnu.org
;; Keywords: convenience

;; 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:
;;
;; Flyspell is a minor Emacs mode performing on-the-fly spelling
;; checking.
;;
;; To enable Flyspell minor mode, type M-x flyspell-mode.
;; This applies only to the current buffer.
;;
;; To enable Flyspell in text representing computer programs, type
;; M-x flyspell-prog-mode.
;; In that mode only text inside comments and strings is checked.
;;
;; Some user variables control the behavior of flyspell.  They are
;; those defined under the `User configuration' comment.

;;; Code:

(require 'ispell)
(eval-when-compile (require 'cl-lib))

;;*---------------------------------------------------------------------*/
;;*    Group ...                                                        */
;;*---------------------------------------------------------------------*/
(defgroup flyspell nil
  "Spell checking on the fly."
  :tag "FlySpell"
  :prefix "flyspell-"
  :group 'ispell
  :group 'processes)

;;*---------------------------------------------------------------------*/
;;*    User configuration ...                                           */
;;*---------------------------------------------------------------------*/
(defcustom flyspell-highlight-flag t
  "How Flyspell should indicate misspelled words.
Non-nil means use highlight, nil means use minibuffer messages."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-mark-duplications-flag t
  "Non-nil means Flyspell reports a repeated word as an error.
See `flyspell-mark-duplications-exceptions' to add exceptions to this rule.
Detection of repeated words is not implemented in
\"large\" regions; see variable `flyspell-large-region'."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-case-fold-duplications t
  "Non-nil means Flyspell matches duplicate words case-insensitively."
  :group 'flyspell
  :type 'boolean
  :version "27.1")

(defcustom flyspell-mark-duplications-exceptions
  '((nil . ("that" "had")) ; Common defaults for English.
    ("\\`francais" . ("nous" "vous")))
  "A list of exceptions for duplicated words.
It should be a list of (LANGUAGE . EXCEPTION-LIST).

LANGUAGE is nil, which means the exceptions apply regardless of
the current dictionary, or a regular expression matching the
dictionary name (`ispell-local-dictionary' or
`ispell-dictionary') for which the exceptions should apply.

EXCEPTION-LIST is a list of strings.  The checked word is
downcased before comparing with these exceptions."
  :group 'flyspell
  :type '(alist :key-type (choice (const :tag "All dictionaries" nil)
				  string)
		:value-type (repeat string))
  :version "24.1")

(defcustom flyspell-sort-corrections nil
  "If non-nil, sort the corrections before popping them.
The sorting is controlled by the `flyspell-sort-corrections-function'
variable, and defaults to sorting alphabetically."
  :group 'flyspell
  :version "21.1"
  :type 'boolean)

(defcustom flyspell-sort-corrections-function
  'flyspell-sort-corrections-alphabetically
  "The function used to sort corrections.
This only happens if `flyspell-sort-corrections' is non-nil.  The
function takes three parameters -- the two correction candidates
to be sorted, and the third parameter is the word that's being
corrected."
  :version "26.1"
  :type 'function
  :group 'flyspell)

(defun flyspell-sort-corrections-alphabetically (corr1 corr2 _)
  (string< corr1 corr2))

(defun flyspell-sort (corrs word)
  (if flyspell-sort-corrections
      (sort corrs
            (lambda (c1 c2)
              (funcall flyspell-sort-corrections-function c1 c2 word)))
    corrs))

(defcustom flyspell-duplicate-distance 400000
  "The maximum distance for finding duplicates of unrecognized words.
This applies to the feature that when a word is not found in the dictionary,
if the same spelling occurs elsewhere in the buffer,
Flyspell uses a different face (`flyspell-duplicate') to highlight it.
This variable specifies how far to search to find such a duplicate.
-1 means no limit (search the whole buffer).
0 means do not search for duplicate unrecognized spellings."
  :group 'flyspell
  :version "24.5"			; -1 -> 400000
  :type '(choice (const :tag "no limit" -1)
		 number))

(defcustom flyspell-delay 3
  "The number of seconds to wait before checking, after a \"delayed\" command."
  :group 'flyspell
  :type 'number)

(defcustom flyspell-persistent-highlight t
  "Non-nil means misspelled words remain highlighted until corrected.
If this variable is nil, only the most recently detected misspelled word
is highlighted, and the highlight is turned off as soon as point moves
off the misspelled word.

Make sure this variable is non-nil if you use `flyspell-region'."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-highlight-properties t
  "Non-nil means highlight incorrect words even if a property exists for this word."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-default-delayed-commands
  '(self-insert-command
    delete-backward-char
    backward-or-forward-delete-char
    delete-char
    scrollbar-vertical-drag
    backward-delete-char-untabify)
  "The standard list of delayed commands for Flyspell.
See `flyspell-delayed-commands'."
  :group 'flyspell
  :version "21.1"
  :type '(repeat (symbol)))

(defcustom flyspell-delayed-commands nil
  "List of commands that are \"delayed\" for Flyspell mode.
After these commands, Flyspell checking is delayed for a short time,
whose length is specified by `flyspell-delay'."
  :group 'flyspell
  :type '(repeat (symbol)))

(defcustom flyspell-default-deplacement-commands
  '(next-line previous-line
    handle-switch-frame handle-select-window
    scroll-up
    scroll-down)
  "The standard list of deplacement commands for Flyspell.
See variable `flyspell-deplacement-commands'."
  :group 'flyspell
  :version "21.1"
  :type '(repeat (symbol)))

(defcustom flyspell-deplacement-commands nil
  "List of commands that are \"deplacement\" for Flyspell mode.
After these commands, Flyspell checking is performed only if the previous
command was not the very same command."
  :group 'flyspell
  :version "21.1"
  :type '(repeat (symbol)))

(defcustom flyspell-issue-welcome-flag t
  "Non-nil means that Flyspell should display a welcome message when started."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-issue-message-flag t
  "Non-nil means that Flyspell emits messages when checking words."
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-incorrect-hook nil
  "List of functions to be called when incorrect words are encountered.
Each function is given three arguments.  The first two
arguments are the beginning and the end of the incorrect region.
The third is either the symbol `doublon' or the list
of possible corrections as returned by `ispell-parse-output'.

If any of the functions return non-nil, the word is not highlighted as
incorrect."
  :group 'flyspell
  :version "21.1"
  :type 'hook)

(defcustom flyspell-default-dictionary nil
  "A string that is the name of the default dictionary.
This is passed to the `ispell-change-dictionary' when flyspell is started.
If the variable `ispell-local-dictionary' or `ispell-dictionary' is non-nil
when flyspell is started, the value of that variable is used instead
of `flyspell-default-dictionary' to select the default dictionary.
Otherwise, if `flyspell-default-dictionary' is nil, it means to use
Ispell's ultimate default dictionary."
  :group 'flyspell
  :version "21.1"
  :type '(choice string (const :tag "Default" nil)))

(defcustom flyspell-tex-command-regexp
  "\\(\\(begin\\|end\\)[ \t]*{\\|\\(cite[a-z*]*\\|label\\|ref\\|eqref\\|usepackage\\|documentclass\\)[ \t]*\\(\\[[^]]*\\]\\)?{[^{}]*\\)"
  "A string that is the regular expression that matches TeX commands."
  :group 'flyspell
  :version "21.1"
  :type 'string)

(defcustom flyspell-check-tex-math-command nil
  "Non-nil means check even inside TeX math environment.
TeX math environments are discovered by `texmathp', implemented
inside AUCTeX package.  That package may be found at
URL `https://www.gnu.org/software/auctex/'"
  :group 'flyspell
  :type 'boolean)

(defcustom flyspell-dictionaries-that-consider-dash-as-word-delimiter
  '("francais" "deutsch8" "norsk")
  "List of dictionary names that consider `-' as word delimiter."
  :group 'flyspell
  :version "21.1"
  :type '(repeat (string)))

(defcustom flyspell-abbrev-p
  nil
  "If non-nil, add correction to abbreviation table."
  :group 'flyspell
  :version "21.1"
  :type 'boolean)

(defcustom flyspell-use-global-abbrev-table-p
  nil
  "If non-nil, prefer global abbrev table to local abbrev table."
  :group 'flyspell
  :version "21.1"
  :type 'boolean)

(defcustom flyspell-mode-line-string " Fly"
  "String displayed on the mode line when flyspell is active.
Set this to nil if you don't want a mode line indicator."
  :group 'flyspell
  :type '(choice string (const :tag "None" nil)))

(defcustom flyspell-large-region 1000
  "The threshold that determines if a region is small.
If the region is smaller than this number of characters,
`flyspell-region' checks the words sequentially using regular
flyspell methods.  Else, if the region is large, a new Ispell process is
spawned for speed.

Doubled words are not detected in a large region, because Ispell
does not check for them.

If this variable is nil, all regions are treated as small."
  :group 'flyspell
  :version "21.1"
  :type '(choice number (const :tag "All small" nil)))

(defcustom flyspell-insert-function (function insert)
  "Function for inserting word by flyspell upon correction."
  :group 'flyspell
  :type 'function)

(defcustom flyspell-before-incorrect-word-string nil
  "String used to indicate an incorrect word starting."
  :group 'flyspell
  :type '(choice string (const nil)))

(defcustom flyspell-after-incorrect-word-string nil
  "String used to indicate an incorrect word ending."
  :group 'flyspell
  :type '(choice string (const nil)))

(defvar flyspell-mode-map)

(defcustom flyspell-use-meta-tab t
  "Non-nil means that flyspell uses M-TAB to correct word."
  :group 'flyspell
  :type 'boolean
  :initialize 'custom-initialize-default
  :set (lambda (sym val)
	 (define-key flyspell-mode-map "\M-\t"
	   (if (set sym val)
	       'flyspell-auto-correct-word))))

(defcustom flyspell-auto-correct-binding
  [(control ?\;)]
  "The key binding for flyspell auto correction."
  :type 'key-sequence
  :group 'flyspell)

;;*---------------------------------------------------------------------*/
;;*    Mode specific options                                            */
;;*    -------------------------------------------------------------    */
;;*    Mode specific options enable users to disable flyspell on        */
;;*    certain word depending of the emacs mode. For instance, when     */
;;*    using flyspell with mail-mode add the following expression       */
;;*    in your init file:                                               */
;;*       (add-hook 'mail-mode                                          */
;;*    	     (lambda () (setq flyspell-generic-check-word-predicate     */
;;*    			       'mail-mode-flyspell-verify)))            */
;;*---------------------------------------------------------------------*/

(define-obsolete-variable-alias 'flyspell-generic-check-word-p
  'flyspell-generic-check-word-predicate "25.1")

(defvar flyspell-generic-check-word-predicate nil
  "Function providing per-mode customization over which words are flyspelled.
Returns t to continue checking, nil otherwise.
Flyspell mode sets this variable to whatever is the `flyspell-mode-predicate'
property of the major mode name.")
(make-variable-buffer-local 'flyspell-generic-check-word-predicate)

;;*--- mail mode -------------------------------------------------------*/
(put 'mail-mode 'flyspell-mode-predicate 'mail-mode-flyspell-verify)
(put 'message-mode 'flyspell-mode-predicate 'mail-mode-flyspell-verify)
(defvar message-signature-separator)
(defun mail-mode-flyspell-verify ()
  "Function used for `flyspell-generic-check-word-predicate' in Mail mode."
  (let* ((header-end (save-excursion
                       (goto-char (point-min))
                       (re-search-forward
                        (concat "^\\(?:"
                                (regexp-quote mail-header-separator)
                                "\\)?$")
                        nil t)
                       (point)))
         (signature-begin
          (if (not (boundp 'message-signature-separator))
              (point-max)
            (save-excursion
              (goto-char (point-max))
              (re-search-backward message-signature-separator
                                  (max header-end (- (point) 4000)) t)
              (point)))))
    (cond ((< (point) header-end)
	   (and (save-excursion (beginning-of-line)
				(looking-at "^Subject:"))
		(> (point) (match-end 0))))
	  ((> (point) signature-begin)
	   nil)
	  (t
	   (save-excursion
	     (beginning-of-line)
	     (not (looking-at "[>}|]\\|To:")))))))

;;*--- texinfo mode ----------------------------------------------------*/
(put 'texinfo-mode 'flyspell-mode-predicate 'texinfo-mode-flyspell-verify)
(defun texinfo-mode-flyspell-verify ()
  "Function used for `flyspell-generic-check-word-predicate' in Texinfo mode."
  (save-excursion
    (forward-word-strictly -1)
    (not (looking-at "@"))))

;;*--- tex mode --------------------------------------------------------*/
(put 'tex-mode 'flyspell-mode-predicate 'tex-mode-flyspell-verify)
(defun tex-mode-flyspell-verify ()
  "Function used for `flyspell-generic-check-word-predicate' in LaTeX mode."
  (and
   (not (save-excursion
	  (re-search-backward "^[ \t]*%%%[ \t]+Local" nil t)))
   (not (save-excursion
	  (let ((this (point)))
	    (beginning-of-line)
	    (and (re-search-forward "\\\\\\(cite\\|label\\|ref\\){[^}]*}"
				    (line-end-position) t)
		 (>= this (match-beginning 0))
		 (<= this (match-end 0))))))))

;;*--- sgml mode -------------------------------------------------------*/
(put 'sgml-mode 'flyspell-mode-predicate 'sgml-mode-flyspell-verify)
(put 'html-mode 'flyspell-mode-predicate 'sgml-mode-flyspell-verify)
(put 'nxml-mode 'flyspell-mode-predicate 'sgml-mode-flyspell-verify)

(autoload 'sgml-lexical-context "sgml-mode")

(defun sgml-mode-flyspell-verify ()
  "Function used for `flyspell-generic-check-word-predicate' in SGML mode.
Tag and attribute names are not spell checked, everything else is.

String values of attributes are checked because they can be text
like <img alt=\"Some thing.\">."

  (not (memq (car (sgml-lexical-context))
	     '(tag pi))))

;;*---------------------------------------------------------------------*/
;;*    Programming mode                                                 */
;;*---------------------------------------------------------------------*/
(defvar flyspell-prog-text-faces
  '(font-lock-string-face font-lock-comment-face font-lock-doc-face)
  "Faces corresponding to text in programming-mode buffers.")

(defun flyspell-generic-progmode-verify ()
  "Used for `flyspell-generic-check-word-predicate' in programming modes."
  (unless (eql (point) (point-min))
    ;; (point) is next char after the word. Must check one char before.
    (let ((f (get-text-property (1- (point)) 'face)))
      (memq f flyspell-prog-text-faces))))

;; Records the binding of M-TAB in effect before flyspell was activated.
(defvar flyspell--prev-meta-tab-binding)

;;;###autoload
(defun flyspell-prog-mode ()
  "Turn on `flyspell-mode' for comments and strings."
  (interactive)
  (setq flyspell-generic-check-word-predicate
        #'flyspell-generic-progmode-verify)
  (setq-local flyspell--prev-meta-tab-binding
              (or (local-key-binding "\M-\t" t)
                  (global-key-binding "\M-\t" t)))
  (flyspell-mode 1)
  (run-hooks 'flyspell-prog-mode-hook))

;;*---------------------------------------------------------------------*/
;;*    Overlay compatibility                                            */
;;*---------------------------------------------------------------------*/
(autoload 'make-overlay            "overlay" "Overlay compatibility kit." t)
(autoload 'overlayp                "overlay" "Overlay compatibility kit." t)
(autoload 'overlays-in             "overlay" "Overlay compatibility kit." t)
(autoload 'delete-overlay          "overlay" "Overlay compatibility kit." t)
(autoload 'overlays-at             "overlay" "Overlay compatibility kit." t)
(autoload 'overlay-put             "overlay" "Overlay compatibility kit." t)
(autoload 'overlay-get             "overlay" "Overlay compatibility kit." t)
(autoload 'previous-overlay-change "overlay" "Overlay compatibility kit." t)

;;*---------------------------------------------------------------------*/
;;*    The minor mode declaration.                                      */
;;*---------------------------------------------------------------------*/
(defvar flyspell-mouse-map
  (let ((map (make-sparse-keymap)))
    (define-key map [mouse-2] 'flyspell-correct-word)
    map)
  "Keymap for Flyspell to put on erroneous words.")

(defvar flyspell-mode-map
  (let ((map (make-sparse-keymap)))
    (if flyspell-use-meta-tab
      (define-key map "\M-\t" 'flyspell-auto-correct-word))
    (define-key map flyspell-auto-correct-binding 'flyspell-auto-correct-previous-word)
    (define-key map [(control ?\,)] 'flyspell-goto-next-error)
    (define-key map [(control ?\.)] 'flyspell-auto-correct-word)
    (define-key map [?\C-c ?$] 'flyspell-correct-word-before-point)
    map)
  "Minor mode keymap for Flyspell mode--for the whole buffer.")

;; dash character machinery
(defvar flyspell-consider-dash-as-word-delimiter-flag nil
  "Non-nil means that the `-' char is considered as a word delimiter.")
(make-variable-buffer-local 'flyspell-consider-dash-as-word-delimiter-flag)
(defvar flyspell-dash-dictionary nil)
(make-variable-buffer-local 'flyspell-dash-dictionary)
(defvar flyspell-dash-local-dictionary nil)
(make-variable-buffer-local 'flyspell-dash-local-dictionary)

;;*---------------------------------------------------------------------*/
;;*    Highlighting                                                     */
;;*---------------------------------------------------------------------*/
(defface flyspell-incorrect
  '((((supports :underline (:style wave)))
     :underline (:style wave :color "Red1"))
    (t
     :underline t :inherit error))
  "Flyspell face for misspelled words."
  :version "24.4"
  :group 'flyspell)

(defface flyspell-duplicate
  '((((supports :underline (:style wave)))
     :underline (:style wave :color "DarkOrange"))
    (t
     :underline t :inherit warning))
  "Flyspell face for words that appear twice in a row.
See also `flyspell-duplicate-distance'."
  :version "24.4"
  :group 'flyspell)

(defvar flyspell-overlay nil)

;;*---------------------------------------------------------------------*/
;;*    flyspell-mode ...                                                */
;;*---------------------------------------------------------------------*/
;;;###autoload(defvar flyspell-mode nil "Non-nil if Flyspell mode is enabled.")
;;;###autoload
(define-minor-mode flyspell-mode
  "Toggle on-the-fly spell checking (Flyspell mode).

Flyspell mode is a buffer-local minor mode.  When enabled, it
spawns a single Ispell process and checks each word.  The default
flyspell behavior is to highlight incorrect words.

Bindings:
\\[ispell-word]: correct words (using Ispell).
\\[flyspell-auto-correct-word]: automatically correct word.
\\[flyspell-auto-correct-previous-word]: automatically correct the last misspelled word.
\\[flyspell-correct-word] (or down-mouse-2): popup correct words.

Hooks:
This runs `flyspell-mode-hook' after flyspell mode is entered or exit.

Remark:
`flyspell-mode' uses `ispell-mode'.  Thus all Ispell options are
valid.  For instance, a different dictionary can be used by
invoking `ispell-change-dictionary'.

Consider using the `ispell-parser' to check your text.  For instance
consider adding:
\(add-hook \\='tex-mode-hook (function (lambda () (setq ispell-parser \\='tex))))
in your init file.

\\[flyspell-region] checks all words inside a region.
\\[flyspell-buffer] checks the whole buffer."
  :lighter flyspell-mode-line-string
  :keymap flyspell-mode-map
  :group 'flyspell
  (if flyspell-mode
      (condition-case err
	  (flyspell-mode-on)
	(error (message "Error enabling Flyspell mode:\n%s" (cdr err))
	       (flyspell-mode -1)))
    (flyspell-mode-off)))

;;;###autoload
(defun turn-on-flyspell ()
  "Unconditionally turn on Flyspell mode."
  (flyspell-mode 1))

;;;###autoload
(defun turn-off-flyspell ()
  "Unconditionally turn off Flyspell mode."
  (flyspell-mode -1))

(custom-add-option 'text-mode-hook 'turn-on-flyspell)

;;*---------------------------------------------------------------------*/
;;*    flyspell-buffers ...                                             */
;;*    -------------------------------------------------------------    */
;;*    For remembering buffers running flyspell                         */
;;*---------------------------------------------------------------------*/
(defvar flyspell-buffers nil)

;;*---------------------------------------------------------------------*/
;;*    flyspell-minibuffer-p ...                                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-minibuffer-p (buffer)
  "Is BUFFER a minibuffer?"
  (let ((ws (get-buffer-window-list buffer t)))
    (and (consp ws) (window-minibuffer-p (car ws)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-accept-buffer-local-defs ...                            */
;;*---------------------------------------------------------------------*/
(defvar flyspell-last-buffer nil
  "The buffer in which the last flyspell operation took place.")

(defun flyspell-accept-buffer-local-defs (&optional force)
  ;; When flyspell-word is used inside a loop (e.g. when processing
  ;; flyspell-changes), the calls to `ispell-accept-buffer-local-defs' end
  ;; up dwarfing everything else, so only do it when the buffer has changed.
  (when (or force (not (eq flyspell-last-buffer (current-buffer))))
    (setq flyspell-last-buffer (current-buffer))
    ;; Strange problem:  If buffer in current window has font-lock turned on,
    ;; but SET-BUFFER was called to point to an invisible buffer, this ispell
    ;; call will reset the buffer to the buffer in the current window.
    ;; However, it only happens at startup (fix by Albert L. Ting).
    (save-current-buffer
      (ispell-accept-buffer-local-defs))
    (unless (and (eq flyspell-dash-dictionary ispell-dictionary)
                 (eq flyspell-dash-local-dictionary ispell-local-dictionary))
      ;; The dictionary has changed
      (setq flyspell-dash-dictionary ispell-dictionary)
      (setq flyspell-dash-local-dictionary ispell-local-dictionary)
      (setq flyspell-consider-dash-as-word-delimiter-flag
            (member (or ispell-local-dictionary ispell-dictionary)
                    flyspell-dictionaries-that-consider-dash-as-word-delimiter)))))

(defun flyspell-hack-local-variables-hook ()
  ;; When local variables are loaded, see if the dictionary context
  ;; has changed.
  (flyspell-accept-buffer-local-defs 'force))

(defun flyspell-kill-ispell-hook ()
  (setq flyspell-last-buffer nil)
  (dolist (buf (buffer-list))
    (with-current-buffer buf
      (kill-local-variable 'flyspell-word-cache-word))))

;; Make sure we flush our caches when needed.  Do it here rather than in
;; flyspell-mode-on, since flyspell-region may be used without ever turning
;; on flyspell-mode.
(add-hook 'ispell-kill-ispell-hook 'flyspell-kill-ispell-hook)

;;*---------------------------------------------------------------------*/
;;*    flyspell-mode-on ...                                             */
;;*---------------------------------------------------------------------*/
(defun flyspell-mode-on ()
  "Turn Flyspell mode on.  Do not use this; use `flyspell-mode' instead."
  (ispell-set-spellchecker-params) ; Initialize variables and dicts alists
  (setq ispell-highlight-face 'flyspell-incorrect)
  ;; local dictionaries setup
  (or ispell-local-dictionary ispell-dictionary
      (if flyspell-default-dictionary
	  (ispell-change-dictionary flyspell-default-dictionary)))
  ;; we have to force ispell to accept the local definition or
  ;; otherwise it could be too late, the local dictionary may
  ;; be forgotten!
  ;; Pass the `force' argument for the case where flyspell was active already
  ;; but the buffer's local-defs have been edited.
  (flyspell-accept-buffer-local-defs 'force)
  ;; we put the `flyspell-delayed' property on some commands
  (flyspell-delay-commands)
  ;; we put the `flyspell-deplacement' property on some commands
  (flyspell-deplacement-commands)
  ;; we bound flyspell action to post-command hook
  (add-hook 'post-command-hook (function flyspell-post-command-hook) t t)
  ;; we bound flyspell action to pre-command hook
  (add-hook 'pre-command-hook (function flyspell-pre-command-hook) t t)
  ;; we bound flyspell action to after-change hook
  (add-hook 'after-change-functions 'flyspell-after-change-function nil t)
  ;; we bound flyspell action to hack-local-variables-hook
  (add-hook 'hack-local-variables-hook
	    (function flyspell-hack-local-variables-hook) t t)
  ;; set flyspell-generic-check-word-predicate based on the major mode
  (let ((mode-predicate (get major-mode 'flyspell-mode-predicate)))
    (if mode-predicate
	(setq flyspell-generic-check-word-predicate mode-predicate)))
  ;; the welcome message
  (if (and flyspell-issue-message-flag
	   flyspell-issue-welcome-flag
	   (called-interactively-p 'interactive))
      (let ((binding (where-is-internal 'flyspell-auto-correct-word
					nil 'non-ascii)))
	(message "%s"
	 (if binding
	     (format "Welcome to flyspell. Use %s or Mouse-2 to correct words."
		     (key-description binding))
	   "Welcome to flyspell. Use Mouse-2 to correct words.")))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-delay-commands ...                                      */
;;*---------------------------------------------------------------------*/
(defun flyspell-delay-commands ()
  "Install the standard set of Flyspell delayed commands."
  (mapc 'flyspell-delay-command flyspell-default-delayed-commands)
  (mapc 'flyspell-delay-command flyspell-delayed-commands))

;;*---------------------------------------------------------------------*/
;;*    flyspell-delay-command ...                                       */
;;*---------------------------------------------------------------------*/
(defun flyspell-delay-command (command)
  "Set COMMAND to be delayed, for Flyspell.
When flyspell `post-command-hook' is invoked because a delayed command
has been used, the current word is not immediately checked.
It will be checked only after `flyspell-delay' seconds."
  (interactive "SDelay Flyspell after Command: ")
  (put command 'flyspell-delayed t))

;;*---------------------------------------------------------------------*/
;;*    flyspell-deplacement-commands ...                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-deplacement-commands ()
  "Install the standard set of Flyspell deplacement commands."
  (mapc 'flyspell-deplacement-command flyspell-default-deplacement-commands)
  (mapc 'flyspell-deplacement-command flyspell-deplacement-commands))

;;*---------------------------------------------------------------------*/
;;*    flyspell-deplacement-command ...                                 */
;;*---------------------------------------------------------------------*/
(defun flyspell-deplacement-command (command)
  "Set COMMAND that implement cursor movements, for Flyspell.
When flyspell `post-command-hook' is invoked because a deplacement command
has been used, the current word is not checked."
  (interactive "SDeplacement Flyspell after Command: ")
  (put command 'flyspell-deplacement t))

;;*---------------------------------------------------------------------*/
;;*    flyspell-word-cache ...                                          */
;;*---------------------------------------------------------------------*/
(defvar flyspell-word-cache-start  nil)
(defvar flyspell-word-cache-end    nil)
(defvar flyspell-word-cache-word   nil)
(defvar flyspell-word-cache-result '_)
(make-variable-buffer-local 'flyspell-word-cache-start)
(make-variable-buffer-local 'flyspell-word-cache-end)
(make-variable-buffer-local 'flyspell-word-cache-word)
(make-variable-buffer-local 'flyspell-word-cache-result)

;;*---------------------------------------------------------------------*/
;;*    The flyspell pre-hook, store the current position. In the        */
;;*    post command hook, we will check, if the word at this position   */
;;*    has to be spell checked.                                         */
;;*---------------------------------------------------------------------*/
(defvar flyspell-pre-buffer     nil "Buffer current before `this-command'.")
(defvar flyspell-pre-point      nil "Point before running `this-command'")
(defvar flyspell-pre-column     nil "Column before running `this-command'")
(defvar flyspell-pre-pre-buffer nil)
(defvar flyspell-pre-pre-point  nil)
(make-variable-buffer-local 'flyspell-pre-point) ;Why??  --Stef

;;*---------------------------------------------------------------------*/
;;*    flyspell-previous-command ...                                    */
;;*---------------------------------------------------------------------*/
(defvar flyspell-previous-command nil
  "The last interactive command checked by Flyspell.")

;;*---------------------------------------------------------------------*/
;;*    flyspell-pre-command-hook ...                                    */
;;*---------------------------------------------------------------------*/
(defun flyspell-pre-command-hook ()
  "Save the current buffer and point for Flyspell's post-command hook."
  (interactive)
  (setq flyspell-pre-buffer (current-buffer))
  (setq flyspell-pre-point  (point))
  (setq flyspell-pre-column (current-column)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-mode-off ...                                            */
;;*---------------------------------------------------------------------*/
;;;###autoload
(defun flyspell-mode-off ()
  "Turn Flyspell mode off."
  ;; We remove the hooks.
  (remove-hook 'post-command-hook (function flyspell-post-command-hook) t)
  (remove-hook 'pre-command-hook (function flyspell-pre-command-hook) t)
  (remove-hook 'after-change-functions 'flyspell-after-change-function t)
  (remove-hook 'hack-local-variables-hook
	       (function flyspell-hack-local-variables-hook) t)
  ;; We remove all the flyspell highlightings.
  (flyspell-delete-all-overlays)
  ;; We have to erase pre cache variables.
  (setq flyspell-pre-buffer nil)
  (setq flyspell-pre-point  nil)
  ;; We mark the mode as killed.
  (setq flyspell-mode nil))

;;*---------------------------------------------------------------------*/
;;*    flyspell-check-pre-word-p ...                                    */
;;*---------------------------------------------------------------------*/
(defun flyspell-check-pre-word-p ()
  "Return non-nil if we should check the word before point.
More precisely, it applies to the word that was before point
before the current command."
  (let ((ispell-otherchars (ispell-get-otherchars)))
    (cond
   ((not (and (numberp flyspell-pre-point)
              (eq flyspell-pre-buffer (current-buffer))))
      nil)
     ((and (eq flyspell-pre-pre-point flyspell-pre-point)
	   (eq flyspell-pre-pre-buffer flyspell-pre-buffer))
      nil)
     ((or (and (= flyspell-pre-point (- (point) 1))
	       (or (eq (char-syntax (char-after flyspell-pre-point)) ?w)
		   (and (not (string= "" ispell-otherchars))
			(string-match
			 ispell-otherchars
			 (buffer-substring-no-properties
			  flyspell-pre-point (1+ flyspell-pre-point))))))
	  (= flyspell-pre-point (point))
	  (= flyspell-pre-point (+ (point) 1)))
      nil)
     ((and (symbolp this-command)
	   (not executing-kbd-macro)
	   (or (get this-command 'flyspell-delayed)
	       (and (get this-command 'flyspell-deplacement)
		    (eq flyspell-previous-command this-command)))
	   (or (= (current-column) 0)
	       (= (current-column) flyspell-pre-column)
	       ;; If other post-command-hooks change the buffer,
	       ;; flyspell-pre-point can lie past eob (bug#468).
	       (null (char-after flyspell-pre-point))
	       (or (eq (char-syntax (char-after flyspell-pre-point)) ?w)
		   (and (not (string= "" ispell-otherchars))
			(string-match
			 ispell-otherchars
			 (buffer-substring-no-properties
			  flyspell-pre-point (1+ flyspell-pre-point)))))))
      nil)
     ((not (eq (current-buffer) flyspell-pre-buffer))
      t)
     ((not (and (numberp flyspell-word-cache-start)
		(numberp flyspell-word-cache-end)))
      t)
     (t
      (or (< flyspell-pre-point flyspell-word-cache-start)
	  (> flyspell-pre-point flyspell-word-cache-end))))))

;;*---------------------------------------------------------------------*/
;;*    The flyspell after-change-hook, store the change position. In    */
;;*    the post command hook, we will check, if the word at this        */
;;*    position has to be spell checked.                                */
;;*---------------------------------------------------------------------*/
(defvar flyspell-changes nil)
(make-variable-buffer-local 'flyspell-changes)

;;*---------------------------------------------------------------------*/
;;*    flyspell-after-change-function ...                               */
;;*---------------------------------------------------------------------*/
(defun flyspell-after-change-function (start stop _len)
  "Save the current buffer and point for Flyspell's post-command hook."
  (push (cons start stop) flyspell-changes))

;;*---------------------------------------------------------------------*/
;;*    flyspell-check-changed-word-p ...                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-check-changed-word-p (start stop)
  "Return non-nil when the changed word has to be checked.
The answer depends of several criteria.
Mostly we check word delimiters."
  (not (and (not (and (memq (char-after start) '(?\n ? )) (> stop start)))
            (numberp flyspell-pre-point)
            (or
             (and (>= flyspell-pre-point start) (<= flyspell-pre-point stop))
             (let ((pos (point)))
               (or (>= pos start) (<= pos stop) (= pos (1+ stop))))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-check-word-p ...                                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-check-word-p ()
  "Return t when the word at `point' has to be checked.
The answer depends of several criteria.
Mostly we check word delimiters."
  (let ((ispell-otherchars (ispell-get-otherchars)))
    (cond
     ((<= (- (point-max) 1) (point-min))
      ;; The buffer is not filled enough.
      nil)
     ((and (and (> (current-column) 0)
		(not (eq (current-column) flyspell-pre-column)))
	   (save-excursion
	     (backward-char 1)
	     (and (looking-at (flyspell-get-not-casechars))
		  (or (string= "" ispell-otherchars)
		      (not (looking-at ispell-otherchars)))
		  (or flyspell-consider-dash-as-word-delimiter-flag
		      (not (looking-at "-"))))))
      ;; Yes because we have reached or typed a word delimiter.
      t)
     ((symbolp this-command)
      (cond
       ((get this-command 'flyspell-deplacement)
	(not (eq flyspell-previous-command this-command)))
       ((get this-command 'flyspell-delayed)
	;; The current command is not delayed, that
	;; is that we must check the word now.
	(and (not unread-command-events)
	     (sit-for flyspell-delay)))
       (t t)))
     (t t))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-debug-signal-no-check ...                               */
;;*---------------------------------------------------------------------*/
(defun flyspell-debug-signal-no-check (msg obj)
  (setq debug-on-error t)
  (with-current-buffer (get-buffer-create "*flyspell-debug*")
    (erase-buffer)
    (insert "NO-CHECK:\n")
    (insert (format "    %S : %S\n" msg obj))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-debug-signal-pre-word-checked ...                       */
;;*---------------------------------------------------------------------*/
(defun flyspell-debug-signal-pre-word-checked ()
  (setq debug-on-error t)
  (with-current-buffer (get-buffer-create "*flyspell-debug*")
    (insert "PRE-WORD:\n")
    (insert (format "  pre-point  : %S\n" flyspell-pre-point))
    (insert (format "  pre-buffer : %S\n" flyspell-pre-buffer))
    (insert (format "  cache-start: %S\n" flyspell-word-cache-start))
    (insert (format "  cache-end  : %S\n" flyspell-word-cache-end))
    (goto-char (point-max))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-debug-signal-word-checked ...                           */
;;*---------------------------------------------------------------------*/
(defun flyspell-debug-signal-word-checked ()
  (setq debug-on-error t)
  (let ((ispell-otherchars (ispell-get-otherchars))
	(oldbuf (current-buffer))
        (point  (point)))
    (with-current-buffer (get-buffer-create "*flyspell-debug*")
      (insert
       "WORD:\n"
       (format "  this-cmd   : %S\n" this-command)
       (format "  delayed    : %S\n" (and (symbolp this-command)
                                          (get this-command
                                               'flyspell-delayed)))
       (format "  point      : %S\n" point)
       (format "  prev-char  : [%c] %S\n"
               (with-current-buffer oldbuf
                 (if (bobp) ?\  (char-before)))
               (with-current-buffer oldbuf
                 (if (bobp)
                     nil
                   (save-excursion
                     (backward-char 1)
                     (and (looking-at (flyspell-get-not-casechars))
                          (or (string= "" ispell-otherchars)
                              (not (looking-at ispell-otherchars)))
                          (or flyspell-consider-dash-as-word-delimiter-flag
                              (not (looking-at "-")))
                          2)))))
       (format "  because    : %S\n"
               (cond
                ((not (and (symbolp this-command)
                           (get this-command 'flyspell-delayed)))
                 ;; The current command is not delayed, that
                 ;; is that we must check the word now.
                 'not-delayed)
                ((with-current-buffer oldbuf
                   (if (bobp)
                       nil
                     (save-excursion
                       (backward-char 1)
                       (and (looking-at (flyspell-get-not-casechars))
                            (or (string= "" ispell-otherchars)
                                (not (looking-at ispell-otherchars)))
                            (or flyspell-consider-dash-as-word-delimiter-flag
                                (not (looking-at "-")))))))
                 ;; Yes because we have reached or typed a word delimiter.
                 'separator)
                ((not (integerp flyspell-delay))
                 ;; Yes because the user set up a no-delay configuration.
                 'no-delay)
                (t
                 'sit-for))))
      (goto-char (point-max)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-debug-signal-changed-checked ...                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-debug-signal-changed-checked ()
  (setq debug-on-error t)
  (let ((point  (point)))
    (with-current-buffer (get-buffer-create "*flyspell-debug*")
      (insert "CHANGED WORD:\n")
      (insert (format "  point   : %S\n" point))
      (goto-char (point-max)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-post-command-hook ...                                   */
;;*    -------------------------------------------------------------    */
;;*    It is possible that we check several words:                      */
;;*    1- the current word is checked if the predicate                  */
;;*       FLYSPELL-CHECK-WORD-P is true                                 */
;;*    2- the word that used to be the current word before the          */
;;*       THIS-COMMAND is checked if:                                   */
;;*        a- the previous word is different from the current word      */
;;*        b- the previous word has not just been checked by the        */
;;*           previous FLYSPELL-POST-COMMAND-HOOK                       */
;;*    3- the words changed by the THIS-COMMAND that are neither the    */
;;*       previous word nor the current word                            */
;;*---------------------------------------------------------------------*/
(defun flyspell-post-command-hook ()
  "The `post-command-hook' used by flyspell to check a word on-the-fly."
  (interactive)
  (when flyspell-mode
    (with-local-quit
      (let ((command this-command)
            ;; Prevent anything we do from affecting the mark.
            deactivate-mark)
        (if (and (eq command 'transpose-chars)
                 flyspell-pre-point)
            (save-excursion
              (goto-char (- flyspell-pre-point 1))
              (flyspell-word)))
        (if (flyspell-check-pre-word-p)
            (save-excursion
              '(flyspell-debug-signal-pre-word-checked)
              (goto-char flyspell-pre-point)
              (flyspell-word)))
        (if (flyspell-check-word-p)
            (progn
              '(flyspell-debug-signal-word-checked)
              ;; FIXME: This should be asynchronous!
              (flyspell-word)
              ;; we remember which word we have just checked.
              ;; this will be used next time we will check a word
              ;; to compare the next current word with the word
              ;; that has been registered in the pre-command-hook
              ;; that is these variables are used within the predicate
              ;; FLYSPELL-CHECK-PRE-WORD-P
              (setq flyspell-pre-pre-buffer (current-buffer))
              (setq flyspell-pre-pre-point  (point)))
          (setq flyspell-pre-pre-buffer nil)
          (setq flyspell-pre-pre-point  nil)
          ;; when a word is not checked because of a delayed command
          ;; we do not disable the ispell cache.
          (when (and (symbolp this-command)
                     (get this-command 'flyspell-delayed))
            (setq flyspell-word-cache-end -1)
            (setq flyspell-word-cache-result '_)))
        (while (and (not (input-pending-p)) (consp flyspell-changes))
          (let ((start (car (car flyspell-changes)))
                (stop  (cdr (car flyspell-changes))))
            (if (flyspell-check-changed-word-p start stop)
                (save-excursion
                  '(flyspell-debug-signal-changed-checked)
                  (goto-char start)
                  (flyspell-word)))
            (setq flyspell-changes (cdr flyspell-changes))))
        (setq flyspell-previous-command command)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-notify-misspell ...                                     */
;;*---------------------------------------------------------------------*/
(defun flyspell-notify-misspell (word poss)
  (let ((replacements (if (stringp poss)
			  poss
			(flyspell-sort (car (cdr (cdr poss))) word))))
    (if flyspell-issue-message-flag
	(message "misspelling `%s'  %S" word replacements))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-word-search-backward ...                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-word-search-backward (word bound &optional ignore-case)
  (save-excursion
    (let* ((r '())
	   (inhibit-point-motion-hooks t)
	   (flyspell-not-casechars (flyspell-get-not-casechars))
	   (bound (if (and bound
			   (> bound (point-min)))
		      (- bound 1)))
	   (word-re (concat
                     "\\(?:" flyspell-not-casechars "\\|\\`\\)"
                     (regexp-quote word)
                     flyspell-not-casechars))
	   p)
      (while
	  (and (not r)
               (setq p
                     (and
                      (re-search-backward word-re bound t)
		      (if (bobp)
			  (point)
                        (forward-char)
                        (point)))))
        (let ((lw (flyspell-get-word)))
          (if (and (consp lw)
                   (if ignore-case
                       (string-equal (downcase (car lw)) (downcase word))
                     (string-equal (car lw) word)))
              (setq r p)
            (goto-char p))))
      r)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-word-search-forward ...                                 */
;;*---------------------------------------------------------------------*/
(defun flyspell-word-search-forward (word bound)
  (save-excursion
    (let* ((r '())
	   (inhibit-point-motion-hooks t)
	   (flyspell-not-casechars (flyspell-get-not-casechars))
	   (bound (if (and bound
			   (< bound (point-max)))
		      (+ bound 1)))
	   (word-re (concat flyspell-not-casechars
                            (regexp-quote word)
                            "\\(?:" flyspell-not-casechars "\\|\\'\\)"))
	   p)
      (while
	  (and (not r)
               (setq p (and
                        (re-search-forward word-re bound t)
                        (if (eobp)
                            (point)
                          (backward-char)
                          (point)))))
        (let ((lw (flyspell-get-word)))
          (if (and (consp lw) (string-equal (car lw) word))
              (setq r p)
            (goto-char (1+ p)))))
      r)))

(defvar flyspell-word) ;Backward compatibility; some predicates made use of it!

;;*---------------------------------------------------------------------*/
;;*    flyspell-word ...                                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-word (&optional following known-misspelling)
  "Spell check a word.
If the optional argument FOLLOWING, or, when called interactively
`ispell-following-word', is non-nil, checks the following (rather
than preceding) word when the cursor is not over a word.  If
optional argument KNOWN-MISSPELLING is non-nil considers word a
misspelling and skips redundant spell-checking step.

See `flyspell-get-word' for details of how this finds the word to
spell-check."
  (interactive (list ispell-following-word))
  (ispell-set-spellchecker-params)    ; Initialize variables and dicts alists
  (save-excursion
    ;; use the correct dictionary
    (flyspell-accept-buffer-local-defs)
    (let* ((cursor-location (point))
           (flyspell-word (flyspell-get-word following))
           start end poss word ispell-filter)
      (if (or (eq flyspell-word nil)
              (and (functionp flyspell-generic-check-word-predicate)
                   (not (funcall flyspell-generic-check-word-predicate))))
	  t
	(progn
	  ;; destructure return flyspell-word info list.
	  (setq start (car (cdr flyspell-word))
		end (car (cdr (cdr flyspell-word)))
		word (car flyspell-word))
	  ;; before checking in the directory, we check for doublons.
	  (cond
	   ((and (or (not (eq ispell-parser 'tex))
		     (and (> start (point-min))
			  (not (memq (char-after (1- start)) '(?\} ?\\)))))
		 flyspell-mark-duplications-flag
		 (not (catch 'exception
			(let ((dict (or ispell-local-dictionary
					ispell-dictionary)))
			  (dolist (except flyspell-mark-duplications-exceptions)
			    (and (or (null (car except))
				     (and (stringp dict)
					  (string-match (car except) dict)))
				 (member (downcase word) (cdr except))
				 (throw 'exception t))))))
		 (save-excursion
		   (goto-char start)
		   (let* ((bound
			   (- start
			      (- end start)
			      (- (save-excursion
                                   (skip-chars-backward " \t\n\f")))))
			  (p (when (>= bound (point-min))
			       (flyspell-word-search-backward
                                word bound flyspell-case-fold-duplications))))
		     (and p (/= p start)))))
	    ;; yes, this is a doublon
	    (flyspell-highlight-incorrect-region start end 'doublon)
	    nil)
	   ((and (eq flyspell-word-cache-start start)
		 (eq flyspell-word-cache-end end)
		 (string-equal flyspell-word-cache-word word))
	    ;; this word had been already checked, we skip
	    flyspell-word-cache-result)
	   ((and (eq ispell-parser 'tex)
		 (flyspell-tex-command-p flyspell-word))
	    ;; this is a correct word (because a tex command)
	    (flyspell-unhighlight-at start)
	    (if (> end start)
		(flyspell-unhighlight-at (- end 1)))
	    t)
	   (t
	    ;; we setup the cache
	    (setq flyspell-word-cache-start start)
	    (setq flyspell-word-cache-end end)
	    (setq flyspell-word-cache-word word)
	    ;; now check spelling of word.
            (if (not known-misspelling)
                (progn
                  (ispell-send-string "%\n")
                  ;; put in verbose mode
                  (ispell-send-string (concat "^" word "\n"))
                  ;; we mark the ispell process so it can be killed
                  ;; when emacs is exited without query
		  (set-process-query-on-exit-flag ispell-process nil)
                  ;; Wait until ispell has processed word.
                  (while (progn
                           (accept-process-output ispell-process)
                           (not (string= "" (car ispell-filter)))))
                  ;; (ispell-send-string "!\n")
                  ;; back to terse mode.
                  ;; Remove leading empty element
                  (setq ispell-filter (cdr ispell-filter))
                  ;; ispell process should return something after word is sent.
                  ;; Tag word as valid (i.e., skip) otherwise
                  (or ispell-filter
                      (setq ispell-filter '(*)))
                  (if (consp ispell-filter)
                      (setq poss (ispell-parse-output (car ispell-filter)))))
              ;; Else, this was a known misspelling to begin with, and
              ;; we should forge an ispell return value.
              (setq poss (list word 1 nil nil)))
	    (let ((res (cond ((eq poss t)
			      ;; correct
			      (setq flyspell-word-cache-result t)
			      (flyspell-unhighlight-at start)
			      (if (> end start)
				  (flyspell-unhighlight-at (- end 1)))
			      t)
			     ((and (stringp poss) flyspell-highlight-flag)
			      ;; correct
			      (setq flyspell-word-cache-result t)
			      (flyspell-unhighlight-at start)
			      (if (> end start)
				  (flyspell-unhighlight-at (- end 1)))
			      t)
			     ((null poss)
			      (setq flyspell-word-cache-result t)
			      (flyspell-unhighlight-at start)
			      (if (> end start)
				  (flyspell-unhighlight-at (- end 1)))
			      t)
			     ((or (and (< flyspell-duplicate-distance 0)
				       (or (save-excursion
					     (goto-char start)
					     (flyspell-word-search-backward
					      word
					      (point-min)))
					   (save-excursion
					     (goto-char end)
					     (flyspell-word-search-forward
					      word
					      (point-max)))))
				  (and (> flyspell-duplicate-distance 0)
				       (or (save-excursion
					     (goto-char start)
					     (flyspell-word-search-backward
					      word
					      (- start
						 flyspell-duplicate-distance)))
					   (save-excursion
					     (goto-char end)
					     (flyspell-word-search-forward
					      word
					      (+ end
						 flyspell-duplicate-distance))))))
			      ;; This is a misspelled word which occurs
			      ;; twice within flyspell-duplicate-distance.
			      (setq flyspell-word-cache-result nil)
			      (if flyspell-highlight-flag
				  (flyspell-highlight-duplicate-region
				   start end poss)
				(message "duplicate `%s'" word))
			      nil)
			     (t
			      (setq flyspell-word-cache-result nil)
			      ;; Highlight the location as incorrect,
			      ;; including offset specified in POSS.
			      (if flyspell-highlight-flag
				  (flyspell-highlight-incorrect-region
				   (if (and (consp poss)
					    (integerp (nth 1 poss)))
				       (+ start (nth 1 poss) -1)
				     start)
				   end poss)
				(flyspell-notify-misspell word poss))
			      nil))))
	      ;; return to original location
	      (goto-char cursor-location)
	      (if ispell-quit (setq ispell-quit nil))
	      res))))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-math-tex-command-p ...                                  */
;;*    -------------------------------------------------------------    */
;;*    This function uses the texmathp package to check if point        */
;;*    is within a TeX math environment. `texmathp' can yield errors    */
;;*    if the document is currently not valid TeX syntax.               */
;;*---------------------------------------------------------------------*/
(defun flyspell-math-tex-command-p ()
  (when (fboundp 'texmathp)
    (if flyspell-check-tex-math-command
        nil
      (condition-case nil
          (texmathp)
        (error nil)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-tex-command-p ...                                       */
;;*---------------------------------------------------------------------*/
(defun flyspell-tex-command-p (word)
  "Return t if WORD is a TeX command."
  (or (save-excursion
	(let ((b  (car (cdr word))))
	  (and (re-search-backward "\\\\" (- (point) 100) t)
	       (or (= (match-end 0) b)
		   (and (goto-char (match-end 0))
			(looking-at flyspell-tex-command-regexp)
			(>= (match-end 0) b))))))
      (flyspell-math-tex-command-p)))

(defalias 'flyspell-get-casechars 'ispell-get-casechars)
(defalias 'flyspell-get-not-casechars 'ispell-get-not-casechars)

;;*---------------------------------------------------------------------*/
;;*    flyspell-get-word ...                                            */
;;*---------------------------------------------------------------------*/
(defun flyspell-get-word (&optional following extra-otherchars)
  "Return the word for spell-checking according to Ispell syntax.
Optional argument FOLLOWING non-nil means to get the following
\(rather than preceding) word when the cursor is not over a word.
Optional second argument EXTRA-OTHERCHARS is a regexp of characters
that may be included as part of a word (see `ispell-dictionary-alist').

This finds the word to spell-check by searching for CASECHARS defined
in `ispell-dictionary-alist' for the current dictionary.  Thus, the
word could be far away from point if point is inside whitespace or
punctuation characters, or in text that belongs to a different
language."
  (let* ((flyspell-casechars (flyspell-get-casechars))
	 (flyspell-not-casechars (flyspell-get-not-casechars))
	 (ispell-otherchars (ispell-get-otherchars))
	 (ispell-many-otherchars-p (ispell-get-many-otherchars-p))
	 (word-regexp (concat flyspell-casechars
			      "+\\("
			      (if (not (string= "" ispell-otherchars))
				  (concat ispell-otherchars "?"))
			      (if extra-otherchars
				  (concat extra-otherchars "?"))
			      flyspell-casechars
			      "+\\)"
			      (if (or ispell-many-otherchars-p
				      extra-otherchars)
				  "*" "?")))
	 did-it-once prevpt
	 start end word)
    ;; find the word
    (if (not (looking-at flyspell-casechars))
	(if following
	    (re-search-forward flyspell-casechars nil t)
	  (re-search-backward flyspell-casechars nil t)))
    ;; move to front of word
    (re-search-backward flyspell-not-casechars nil 'start)
    (while (and (or (and (not (string= "" ispell-otherchars))
			 (looking-at ispell-otherchars))
		    (and extra-otherchars (looking-at extra-otherchars)))
		(not (bobp))
		(or (not did-it-once)
		    ispell-many-otherchars-p)
		(not (eq prevpt (point))))
      (if (and extra-otherchars (looking-at extra-otherchars))
	  (progn
	    (backward-char 1)
	    (if (looking-at flyspell-casechars)
		(re-search-backward flyspell-not-casechars nil 'move)))
	(setq did-it-once t
	      prevpt (point))
	(backward-char 1)
	(if (looking-at flyspell-casechars)
	    (re-search-backward flyspell-not-casechars nil 'move)
	  (backward-char -1))))
    ;; Now mark the word and save to string.
    (if (not (re-search-forward word-regexp nil t))
	nil
      (progn
	(setq start (match-beginning 0)
	      end (point)
	      word (buffer-substring-no-properties start end))
	(list word start end)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-small-region ...                                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-small-region (beg end)
  "Flyspell text between BEG and END.

This function is intended to work on small regions, as
determined by `flyspell-large-region'."
  (save-excursion
    (if (> beg end)
	(let ((old beg))
	  (setq beg end)
	  (setq end old)))
    (goto-char beg)
    (let ((count 0))
      (while (< (point) end)
	(if (and flyspell-issue-message-flag (= count 100))
	    (progn
	      (message "Spell Checking...%d%%"
		       (floor (* 100.0 (- (point) beg)) (- end beg)))
	      (setq count 0))
	  (setq count (+ 1 count)))
	(flyspell-word)
	(sit-for 0)
	(let ((cur (point)))
	  (forward-word 1)
	  (if (and (< (point) end) (> (point) (+ cur 1)))
	      (backward-char 1)))))
    (backward-char 1)
    (if flyspell-issue-message-flag (message "Spell Checking completed."))
    (flyspell-word)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-external-ispell-process ...                             */
;;*---------------------------------------------------------------------*/
(defvar flyspell-external-ispell-process '()
  "The external Flyspell Ispell process.")

;;*---------------------------------------------------------------------*/
;;*    flyspell-external-ispell-buffer ...                              */
;;*---------------------------------------------------------------------*/
(defvar flyspell-external-ispell-buffer '())
(defvar flyspell-large-region-buffer '())
(defvar flyspell-large-region-beg (point-min))
(defvar flyspell-large-region-end (point-max))

;;*---------------------------------------------------------------------*/
;;*    flyspell-external-point-words ...                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-external-point-words ()
  "Mark words from a buffer listing incorrect words in order of appearance.
The list of incorrect words should be in `flyspell-external-ispell-buffer'.
\(We finish by killing that buffer and setting the variable to nil.)
The buffer to mark them in is `flyspell-large-region-buffer'."
  (let* (words-not-found
         (flyspell-casechars (flyspell-get-casechars))
         (ispell-otherchars (ispell-get-otherchars))
         (ispell-many-otherchars-p (ispell-get-many-otherchars-p))
         (word-chars (concat flyspell-casechars
                             "+\\("
                             (if (not (string= "" ispell-otherchars))
                                 (concat ispell-otherchars "?"))
                             flyspell-casechars
                             "+\\)"
                             (if ispell-many-otherchars-p
                                 "*" "?")))
         (buffer-scan-pos flyspell-large-region-beg)
         case-fold-search)
    (with-current-buffer flyspell-external-ispell-buffer
      (goto-char (point-min))
      ;; Loop over incorrect words, in the order they were reported,
      ;; which is also the order they appear in the buffer being checked.
      (while (re-search-forward "\\([^\n]+\\)\n" nil t)
	;; Bind WORD to the next one.
	(let ((word (match-string 1)) (wordpos (point)))
	  ;; Here there used to be code to see if WORD is the same
	  ;; as the previous iteration, and count the number of consecutive
	  ;; identical words, and the loop below would search for that many.
	  ;; That code seemed to be incorrect, and on principle, should
	  ;; be unnecessary too. -- rms.
	  (if flyspell-issue-message-flag
	      (message "Spell Checking...%d%% [%s]"
		       (floor (* 100.0 (point)) (point-max))
		       word))
	  (with-current-buffer flyspell-large-region-buffer
	    (goto-char buffer-scan-pos)
	    (let ((keep t))
	      ;; Iterate on string search until string is found as word,
	      ;; not as substring.
	      (while keep
		(if (search-forward word
				    flyspell-large-region-end t)
		    (let* ((found-list
			    (save-excursion
			      ;; Move back into the match
			      ;; so flyspell-get-word will find it.
			      (forward-char -1)
                              ;; Is this a word that matches the
                              ;; current dictionary?
                              (if (looking-at word-chars)
			          (flyspell-get-word))))
			   (found (car found-list))
			   (found-length (length found))
			   (misspell-length (length word)))
		      (when (or
                             ;; Misspelled word is not from the
                             ;; language supported by the current
                             ;; dictionary.
                             (null found)
			     ;; Size matches, we really found it.
			     (= found-length misspell-length)
			     ;; Matches as part of a boundary-char separated
			     ;; word.
			     (member word
				     (split-string found ispell-otherchars))
			     ;; Misspelling has higher length than
			     ;; what flyspell considers the word.
                             ;; Caused by boundary-chars mismatch.
                             ;; Validating seems safe.
			     (< found-length misspell-length)
			     ;; ispell treats beginning of some TeX
			     ;; commands as nroff control sequences
			     ;; and strips them in the list of
			     ;; misspelled words thus giving a
			     ;; non-existent word.  Skip if ispell
			     ;; is used, string is a TeX command
			     ;; (char before beginning of word is
			     ;; backslash) and none of the previous
			     ;; conditions match.
			     (and (not ispell-really-aspell)
                                  (not ispell-really-hunspell)
                                  (not ispell-really-enchant)
				  (save-excursion
				    (goto-char (- (nth 1 found-list) 1))
				    (if (looking-at "[\\]" )
					t
				      nil))))
			(setq keep nil)
                        ;; Don't try spell-checking words whose
                        ;; characters don't match CASECHARS, because
                        ;; flyspell-word will then consider as
                        ;; misspelling the preceding word that matches
                        ;; CASECHARS.
                        (or (null found)
			    (flyspell-word nil t))
			;; Search for next misspelled word will begin from
			;; end of last validated match.
			(setq buffer-scan-pos (point))))
		  ;; Record if misspelling is not found and try new one
		  (cl-pushnew (concat " -> " word " - "
				       (int-to-string wordpos))
                              words-not-found :test #'equal)
		  (setq keep nil)))))))
      ;; we are done
      (if flyspell-issue-message-flag (message "Spell Checking completed.")))
    ;; Warn about not found misspellings
    (dolist (word words-not-found)
      (message "%s: word not found" word))
    ;; Kill and forget the buffer with the list of incorrect words.
    (kill-buffer flyspell-external-ispell-buffer)
    (setq flyspell-external-ispell-buffer nil)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-process-localwords ...                                  */
;;*    -------------------------------------------------------------    */
;;*    This function is used to prevent marking of words explicitly     */
;;*    declared correct.                                                */
;;*---------------------------------------------------------------------*/
(defun flyspell-process-localwords (misspellings-buffer)
  (let ((localwords ispell-buffer-session-localwords)
	case-fold-search
	(ispell-casechars (ispell-get-casechars)))
    ;; Get localwords from the original buffer
    (save-excursion
      (goto-char (point-min))
      ;; Localwords parsing copied from ispell.el.
      (while (search-forward ispell-words-keyword nil t)
	(let ((end (point-at-eol))
	      string)
	  ;; buffer-local words separated by a space, and can contain
	  ;; any character other than a space.  Not rigorous enough.
	  (while (re-search-forward " *\\([^ ]+\\)" end t)
	    (setq string (buffer-substring-no-properties (match-beginning 1)
							 (match-end 1)))
	    ;; This can fail when string contains a word with invalid chars.
	    ;; Error handling needs to be added between Ispell and Emacs.
	    (if (and (< 1 (length string))
		     (equal 0 (string-match ispell-casechars string)))
		(push string localwords))))))
    ;; Remove localwords matches from misspellings-buffer.
    ;; The usual mechanism of communicating the local words to ispell
    ;; does not affect the special ispell process used by
    ;; flyspell-large-region.
    (with-current-buffer misspellings-buffer
      (save-excursion
	(dolist (word localwords)
	  (goto-char (point-min))
	  (let ((regexp (concat "^" word "\n")))
	    (while (re-search-forward regexp nil t)
	      (delete-region (match-beginning 0) (match-end 0)))))))))

;;* ---------------------------------------------------------------
;;*     flyspell-check-region-doublons
;;* ---------------------------------------------------------------
(defun flyspell-check-region-doublons (beg end)
  "Check for adjacent duplicated words (doublons) in the given region."
  (save-excursion
    (goto-char beg)
    (flyspell-word)     ; Make sure current word is checked
    (backward-word 1)
    (while (and (< (point) end)
		(re-search-forward "\\<\\(\\w+\\)\\>[ \n\t\f]+\\1\\>"
				   end 'move))
      (flyspell-word)
      (backward-word 1))
    (flyspell-word)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-large-region ...                                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-large-region (beg end)
  (let* ((curbuf  (current-buffer))
	 (buffer  (get-buffer-create "*flyspell-region*")))
    (setq flyspell-external-ispell-buffer buffer)
    (setq flyspell-large-region-buffer curbuf)
    (setq flyspell-large-region-beg beg)
    (setq flyspell-large-region-end end)
    (flyspell-accept-buffer-local-defs)
    (set-buffer buffer)
    (erase-buffer)
    ;; this is done, we can start checking...
    (if flyspell-issue-message-flag (message "Checking region..."))
    (set-buffer curbuf)
    (ispell-set-spellchecker-params)  ; Initialize variables and dicts alists
    ;; Local dictionary becomes the global dictionary in use.
    (setq ispell-current-dictionary
	  (or ispell-local-dictionary ispell-dictionary))
    (setq ispell-current-personal-dictionary
	  (or ispell-local-pdict ispell-personal-dictionary))
    (let ((args (ispell-get-ispell-args))
	  (encoding (ispell-get-coding-system))
	  c)
      (if (and ispell-current-dictionary  ; use specified dictionary
	       (not (member "-d" args)))  ; only define if not overridden
	  (setq args
		(append (list "-d" ispell-current-dictionary) args)))
      (if ispell-current-personal-dictionary ; use specified pers dict
	  (setq args
		(append args
			(list "-p"
			      (expand-file-name
			       ispell-current-personal-dictionary)))))

      ;; Check for extended character mode
      (let ((extended-char-mode (ispell-get-extended-character-mode)))
        (and extended-char-mode          ; ~ extended character mode
	     (string-match "[^~]+$" extended-char-mode)
	     (cl-pushnew (concat "-T" (match-string 0 extended-char-mode))
                         args :test #'equal)))

      ;; Add ispell-extra-args
      (setq args (append args ispell-extra-args))

      ;; If we are using recent aspell or hunspell, make sure we use the right encoding
      ;; for communication. ispell or older aspell/hunspell does not support this
      (if ispell-encoding8-command
	  (setq args
		(append args
			(if ispell-really-hunspell
			    (list ispell-encoding8-command
				  (upcase (symbol-name encoding)))
			  (list (concat ispell-encoding8-command
					(symbol-name encoding)))))))

      (let ((process-coding-system-alist (list (cons "\\.*" encoding))))
	(setq c (apply 'ispell-call-process-region beg
		       end
		       ispell-program-name
		       nil
		       buffer
		       nil
		       (if ispell-really-aspell "list" "-l")
		       args)))
      (if (eq c 0)
	  (progn
	    (flyspell-process-localwords buffer)
	    (with-current-buffer curbuf
	      (flyspell-delete-region-overlays beg end)
	      (flyspell-check-region-doublons beg end))
	    (flyspell-external-point-words))
	(error "Can't check region")))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-region ...                                              */
;;*    -------------------------------------------------------------    */
;;*    Because `ispell -a' is too slow, it is not possible to use       */
;;*    it on large region. Then, when ispell is invoked on a large      */
;;*    text region, a new `ispell -l' process is spawned. The           */
;;*    pointed out words are then searched in the region a checked with */
;;*    regular flyspell means.                                          */
;;*---------------------------------------------------------------------*/
;;;###autoload
(defun flyspell-region (beg end)
  "Flyspell text between BEG and END.

Make sure `flyspell-mode' is turned on if you want the highlight
of a misspelled word removed when you've corrected it."
  (interactive "r")
  (ispell-set-spellchecker-params)  ; Initialize variables and dicts alists
  (if (= beg end)
      ()
    (save-excursion
      (if (> beg end)
	  (let ((old beg))
	    (setq beg end)
	    (setq end old)))
      (if (and flyspell-large-region (> (- end beg) flyspell-large-region))
	  (flyspell-large-region beg end)
	(flyspell-small-region beg end)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-buffer ...                                              */
;;*---------------------------------------------------------------------*/
;;;###autoload
(defun flyspell-buffer ()
  "Flyspell whole buffer."
  (interactive)
  (flyspell-region (point-min) (point-max)))

;;*---------------------------------------------------------------------*/
;;*    old next error position ...                                      */
;;*---------------------------------------------------------------------*/
(defvar flyspell-old-buffer-error nil)
(defvar flyspell-old-pos-error nil)

;;*---------------------------------------------------------------------*/
;;*    flyspell-goto-next-error ...                                     */
;;*---------------------------------------------------------------------*/
(defun flyspell-goto-next-error ()
  "Go to the next previously detected error.
In general FLYSPELL-GOTO-NEXT-ERROR must be used after
FLYSPELL-BUFFER."
  (interactive)
  (let ((pos (point))
	(max (point-max)))
    (if (and (eq (current-buffer) flyspell-old-buffer-error)
	     (eq pos flyspell-old-pos-error))
	(progn
	  (if (= flyspell-old-pos-error max)
	      ;; goto beginning of buffer
	      (progn
		(message "Restarting from beginning of buffer")
		(goto-char (point-min)))
	    (forward-word 1))
	  (setq pos (point))))
    ;; seek the next error
    (while (and (< pos max)
		(let ((ovs (overlays-at pos))
		      (r '()))
		  (while (and (not r) (consp ovs))
		    (if (flyspell-overlay-p (car ovs))
			(setq r t)
		      (setq ovs (cdr ovs))))
		  (not r)))
      (setq pos (1+ pos)))
    ;; save the current location for next invocation
    (setq flyspell-old-pos-error pos)
    (setq flyspell-old-buffer-error (current-buffer))
    (goto-char pos)
    (if (= pos max)
	(message "No more miss-spelled word!"))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-overlay-p ...                                           */
;;*---------------------------------------------------------------------*/
(defun flyspell-overlay-p (o)
  "Return true if O is an overlay used by flyspell."
  (and (overlayp o) (overlay-get o 'flyspell-overlay)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-delete-region-overlays, flyspell-delete-all-overlays    */
;;*    -------------------------------------------------------------    */
;;*    Remove overlays introduced by flyspell.                          */
;;*---------------------------------------------------------------------*/
(defun flyspell-delete-region-overlays (beg end)
  "Delete overlays used by flyspell in a given region."
  (remove-overlays beg end 'flyspell-overlay t))

(defun flyspell-delete-all-overlays ()
  "Delete all the overlays used by flyspell."
  (flyspell-delete-region-overlays (point-min) (point-max)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-unhighlight-at ...                                      */
;;*---------------------------------------------------------------------*/
(defun flyspell-unhighlight-at (pos)
  "Remove the flyspell overlay that are located at POS."
  (if flyspell-persistent-highlight
      (let ((overlays (overlays-at pos)))
	(while (consp overlays)
	  (if (flyspell-overlay-p (car overlays))
	      (delete-overlay (car overlays)))
	  (setq overlays (cdr overlays))))
    (if (flyspell-overlay-p flyspell-overlay)
        (delete-overlay flyspell-overlay))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-properties-at-p ...                                     */
;;*    -------------------------------------------------------------    */
;;*    Is there a highlight property at position pos?                   */
;;*---------------------------------------------------------------------*/
(defun flyspell-properties-at-p (pos)
  "Return t if there is a text property at POS, not counting `local-map'.
If variable `flyspell-highlight-properties' is set to nil,
text with properties are not checked.  This function is used to discover
if the character at POS has any other property."
  (let ((prop (text-properties-at pos))
	(keep t))
    (while (and keep (consp prop))
      (if (and (eq (car prop) 'local-map) (consp (cdr prop)))
	  (setq prop (cdr (cdr prop)))
	(setq keep nil)))
    (consp prop)))

;;*---------------------------------------------------------------------*/
;;*    make-flyspell-overlay ...                                        */
;;*---------------------------------------------------------------------*/
(defun make-flyspell-overlay (beg end face mouse-face)
  "Allocate an overlay to highlight an incorrect word.
BEG and END specify the range in the buffer of that word.
FACE and MOUSE-FACE specify the `face' and `mouse-face' properties
for the overlay."
  (let ((overlay (make-overlay beg end nil t nil)))
    (overlay-put overlay 'face face)
    (overlay-put overlay 'mouse-face mouse-face)
    (overlay-put overlay 'flyspell-overlay t)
    (overlay-put overlay 'evaporate t)
    (overlay-put overlay 'help-echo "mouse-2: correct word at point")
    ;; If misspelled text has a 'keymap' property, let that remain in
    ;; effect for the bindings that flyspell-mouse-map doesn't override.
    (set-keymap-parent flyspell-mouse-map (get-char-property beg 'keymap))
    (overlay-put overlay 'keymap flyspell-mouse-map)
    (when (eq face 'flyspell-incorrect)
      (and (stringp flyspell-before-incorrect-word-string)
           (overlay-put overlay 'before-string
                        flyspell-before-incorrect-word-string))
      (and (stringp flyspell-after-incorrect-word-string)
           (overlay-put overlay 'after-string
                        flyspell-after-incorrect-word-string)))
    overlay))

;;*---------------------------------------------------------------------*/
;;*    flyspell-highlight-incorrect-region ...                          */
;;*---------------------------------------------------------------------*/
(defun flyspell-highlight-incorrect-region (beg end poss)
  "Set up an overlay on a misspelled word, in the buffer from BEG to END.
POSS is usually a list of possible spelling/correction lists,
as returned by `ispell-parse-output'.
It can also be the symbol `doublon', in the case where the word
is itself incorrect, but suspiciously repeated."
  (let ((inhibit-read-only t))
    (unless (run-hook-with-args-until-success
	     'flyspell-incorrect-hook beg end poss)
      (if (or flyspell-highlight-properties
	      (not (flyspell-properties-at-p beg)))
	  (progn
	    ;; we cleanup all the overlay that are in the region, not
	    ;; beginning at the word start position
	    (if (< (1+ beg) end)
		(let ((os (overlays-in (1+ beg) end)))
		  (while (consp os)
		    (if (flyspell-overlay-p (car os))
			(delete-overlay (car os)))
		    (setq os (cdr os)))))
	    ;; we cleanup current overlay at the same position
            (flyspell-unhighlight-at beg)
	    ;; now we can use a new overlay
	    (setq flyspell-overlay
		  (make-flyspell-overlay
		   beg end
		   (if (eq poss 'doublon) 'flyspell-duplicate 'flyspell-incorrect)
		   'highlight)))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-highlight-duplicate-region ...                          */
;;*---------------------------------------------------------------------*/
(defun flyspell-highlight-duplicate-region (beg end poss)
  "Set up an overlay on a duplicate misspelled word, in the buffer from BEG to END.
POSS is a list of possible spelling/correction lists,
as returned by `ispell-parse-output'."
  (let ((inhibit-read-only t))
    (unless (run-hook-with-args-until-success
	     'flyspell-incorrect-hook beg end poss)
      (if (or flyspell-highlight-properties
	      (not (flyspell-properties-at-p beg)))
	  (progn
	    ;; we cleanup current overlay at the same position
            (flyspell-unhighlight-at beg)
	    ;; now we can use a new overlay
	    (setq flyspell-overlay
		  (make-flyspell-overlay beg end
					 'flyspell-duplicate
					 'highlight)))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-auto-correct-cache ...                                  */
;;*---------------------------------------------------------------------*/
(defvar flyspell-auto-correct-pos nil)
(defvar flyspell-auto-correct-region nil)
(defvar flyspell-auto-correct-ring nil)
(defvar flyspell-auto-correct-word nil)
(make-variable-buffer-local 'flyspell-auto-correct-pos)
(make-variable-buffer-local 'flyspell-auto-correct-region)
(make-variable-buffer-local 'flyspell-auto-correct-ring)
(make-variable-buffer-local 'flyspell-auto-correct-word)

;;*---------------------------------------------------------------------*/
;;*    flyspell-check-previous-highlighted-word ...                     */
;;*---------------------------------------------------------------------*/
(defun flyspell-check-previous-highlighted-word (&optional arg)
  "Correct the closest previous word that is highlighted as misspelled.
This function scans for a word which starts before point that has been
highlighted by Flyspell as misspelled.  If it finds one, it proposes
a replacement for that word.  With prefix arg N, check the Nth word
before point that's highlighted as misspelled."
  (interactive "P")
  (let ((pos1 (point))
	(pos  (point))
	(arg  (if (or (not (numberp arg)) (< arg 1)) 1 arg))
	ov ovs)
    (if (catch 'exit
	  (while (and (setq pos (previous-overlay-change pos))
		      (not (= pos pos1)))
	    (setq pos1 pos)
	    (if (> pos (point-min))
		(progn
		  (setq ovs (overlays-at pos))
		  (while (consp ovs)
		    (setq ov (car ovs))
		    (setq ovs (cdr ovs))
		    (if (and (flyspell-overlay-p ov)
			     (= 0 (setq arg (1- arg))))
			(throw 'exit t)))))))
	(save-excursion
	  (goto-char pos)
	  (ispell-word)
	  (setq flyspell-word-cache-word nil) ;; Force flyspell-word re-check
	  (flyspell-word))
      (error "No word to correct before point"))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-display-next-corrections ...                            */
;;*---------------------------------------------------------------------*/
(defun flyspell-display-next-corrections (corrections)
  (let ((string "Corrections:")
	(l corrections)
	(pos '()))
    (while (< (length string) 80)
      (if (equal (car l) flyspell-auto-correct-word)
	  (setq pos (cons (+ 1 (length string)) pos)))
      (setq string (concat string " " (car l)))
      (setq l (cdr l)))
    (while (consp pos)
      (let ((num (car pos)))
	(put-text-property num
			   (+ num (length flyspell-auto-correct-word))
			   'face 'flyspell-incorrect
			   string))
      (setq pos (cdr pos)))
    (if (fboundp 'display-message)
	(display-message 'no-log string)
      (message "%s" string))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-abbrev-table ...                                        */
;;*---------------------------------------------------------------------*/
(defun flyspell-abbrev-table ()
  (if flyspell-use-global-abbrev-table-p
      global-abbrev-table
    (or local-abbrev-table global-abbrev-table)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-define-abbrev ...                                       */
;;*---------------------------------------------------------------------*/
(defun flyspell-define-abbrev (name expansion)
  (let ((table (flyspell-abbrev-table)))
    (when table
      (define-abbrev table (downcase name) expansion))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-auto-correct-word ...                                   */
;;*---------------------------------------------------------------------*/
(defun flyspell-auto-correct-word ()
  "Correct the current word.
This command proposes various successive corrections for the
current word.  If invoked repeatedly on the same position, it
cycles through the possible corrections of the current word.

See `flyspell-get-word' for details of how this finds the word to
spell-check."
  (interactive)
  ;; If we are not in the construct where flyspell should be active,
  ;; invoke the original binding of M-TAB, if that was recorded.
  (if (and (local-variable-p 'flyspell--prev-meta-tab-binding)
           (commandp flyspell--prev-meta-tab-binding t)
           (functionp flyspell-generic-check-word-predicate)
           (not (funcall flyspell-generic-check-word-predicate))
           (equal (where-is-internal 'flyspell-auto-correct-word nil t)
                  [?\M-\t]))
      (call-interactively flyspell--prev-meta-tab-binding)
    (let ((pos     (point))
          (old-max (point-max)))
      ;; Flush a possibly stale cache from previous invocations of
      ;; flyspell-auto-correct-word/flyspell-auto-correct-previous-word.
      (if (not (memq last-command '(flyspell-auto-correct-word
                                    flyspell-auto-correct-previous-word)))
          (setq flyspell-auto-correct-region nil))
      ;; Use the correct dictionary.
      (flyspell-accept-buffer-local-defs)
      (if (and (eq flyspell-auto-correct-pos pos)
               (consp flyspell-auto-correct-region))
          ;; We have already been using the function at the same location.
          (let* ((start (car flyspell-auto-correct-region))
                 (len   (cdr flyspell-auto-correct-region)))
            (flyspell-unhighlight-at start)
            (delete-region start (+ start len))
            (setq flyspell-auto-correct-ring (cdr flyspell-auto-correct-ring))
            (let* ((word (car flyspell-auto-correct-ring))
                   (len  (length word)))
              (rplacd flyspell-auto-correct-region len)
              (goto-char start)
              (if flyspell-abbrev-p
                  (if (flyspell-already-abbrevp (flyspell-abbrev-table)
                                                flyspell-auto-correct-word)
                      (flyspell-change-abbrev (flyspell-abbrev-table)
                                              flyspell-auto-correct-word
                                              word)
                    (flyspell-define-abbrev flyspell-auto-correct-word word)))
              (funcall flyspell-insert-function word)
              (flyspell-word)
              (flyspell-display-next-corrections flyspell-auto-correct-ring))
            (flyspell-adjust-cursor-point pos (point) old-max)
            (setq flyspell-auto-correct-pos (point)))
        ;; Fetch the word to be checked.
        (let ((word (flyspell-get-word)))
          (if (consp word)
              (let ((start (car (cdr word)))
                    (end (car (cdr (cdr word))))
                    (word (car word))
                    poss ispell-filter)
                (setq flyspell-auto-correct-word word)
                ;; Now check spelling of word..
                (ispell-send-string "%\n") ;Put in verbose mode.
                (ispell-send-string (concat "^" word "\n"))
                ;; Wait until ispell has processed word.
                (while (progn
                         (accept-process-output ispell-process)
                         (not (string= "" (car ispell-filter)))))
                ;; Remove leading empty element.
                (setq ispell-filter (cdr ispell-filter))
                ;; Ispell process should return something after word is sent.
                ;; Tag word as valid (i.e., skip) otherwise.
                (or ispell-filter
                    (setq ispell-filter '(*)))
                (if (consp ispell-filter)
                    (setq poss (ispell-parse-output (car ispell-filter))))
                (cond
                 ((or (eq poss t) (stringp poss))
                  ;; Don't correct word.
                  t)
                 ((null poss)
                  ;; Ispell error.
                  (error "Ispell: error in Ispell process"))
                 (t
                  ;; The word is incorrect, we have to propose a replacement.
                  (let ((replacements (flyspell-sort (car (cdr (cdr poss)))
                                                     word)))
                    (setq flyspell-auto-correct-region nil)
                    (if (consp replacements)
                        (progn
                          (let ((replace (car replacements)))
                            (let ((new-word replace))
                              (if (not (equal new-word (car poss)))
                                  (progn
                                    ;; then save the current replacements
                                    (setq flyspell-auto-correct-region
                                          (cons start (length new-word)))
                                    (let ((l replacements))
                                      (while (consp (cdr l))
                                        (setq l (cdr l)))
                                      (rplacd l (cons (car poss) replacements)))
                                    (setq flyspell-auto-correct-ring
                                          replacements)
                                    (flyspell-unhighlight-at start)
                                    (delete-region start end)
                                    (funcall flyspell-insert-function new-word)
                                    (if flyspell-abbrev-p
                                        (if (flyspell-already-abbrevp
                                             (flyspell-abbrev-table) word)
                                            (flyspell-change-abbrev
                                             (flyspell-abbrev-table)
                                             word
                                             new-word)
                                          (flyspell-define-abbrev word
                                                                  new-word)))
                                    (flyspell-word)
                                    (flyspell-display-next-corrections
                                     (cons new-word flyspell-auto-correct-ring))
                                    (flyspell-adjust-cursor-point pos
                                                                 (point)
                                                                 old-max))))))))))
                (setq flyspell-auto-correct-pos (point))
                (ispell-pdict-save t))))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-auto-correct-previous-pos ...                           */
;;*---------------------------------------------------------------------*/
(defvar flyspell-auto-correct-previous-pos nil
  "Holds the start of the first incorrect word before point.")

;;*---------------------------------------------------------------------*/
;;*    flyspell-auto-correct-previous-hook ...                          */
;;*---------------------------------------------------------------------*/
(defun flyspell-auto-correct-previous-hook ()
  "Hook to track successive calls to `flyspell-auto-correct-previous-word'.
Sets `flyspell-auto-correct-previous-pos' to nil."
  (interactive)
  (remove-hook 'pre-command-hook (function flyspell-auto-correct-previous-hook) t)
  (unless (eq this-command (function flyspell-auto-correct-previous-word))
    (setq flyspell-auto-correct-previous-pos nil)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-auto-correct-previous-word ...                          */
;;*---------------------------------------------------------------------*/
(defun flyspell-auto-correct-previous-word (position)
  "Auto correct the first misspelled word that occurs before point.
But don't look beyond what's visible on the screen."
  (interactive "d")

  (let ((top (window-start))
	(bot (window-end)))
    (save-excursion
      (save-restriction
	(narrow-to-region top bot)
	(overlay-recenter (point))

	(add-hook 'pre-command-hook
		  (function flyspell-auto-correct-previous-hook) t t)

	(unless flyspell-auto-correct-previous-pos
	  ;; only reset if a new overlay exists
	  (setq flyspell-auto-correct-previous-pos nil)

	  (let ((overlay-list (overlays-in (point-min) position))
		(new-overlay 'dummy-value))

	    ;; search for previous (new) flyspell overlay
	    (while (and new-overlay
			(or (not (flyspell-overlay-p new-overlay))
			    ;; check if its face has changed
			    (not (eq (get-char-property
				      (overlay-start new-overlay) 'face)
				     'flyspell-incorrect))))
	      (setq new-overlay (car-safe overlay-list))
	      (setq overlay-list (cdr-safe overlay-list)))

	    ;; if nothing new exits new-overlay should be nil
	    (if new-overlay ;; the length of the word may change so go to the start
		(setq flyspell-auto-correct-previous-pos
		      (overlay-start new-overlay)))))

	(when flyspell-auto-correct-previous-pos
	  (save-excursion
	    (goto-char flyspell-auto-correct-previous-pos)
	    (let ((ispell-following-word t)) ;; point is at start
	      (if (numberp flyspell-auto-correct-previous-pos)
		  (goto-char flyspell-auto-correct-previous-pos))
	      (flyspell-auto-correct-word))
	    ;; the point may have moved so reset this
	    (setq flyspell-auto-correct-previous-pos (point))))))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-correct-word ...                                        */
;;*---------------------------------------------------------------------*/

(defun flyspell-correct-word (event)
  "Pop up a menu of possible corrections for a misspelled word.
The word checked is the word at the mouse position."
  (interactive "e")
  (let ((save (point)))
    (mouse-set-point event)
    (flyspell-correct-word-before-point event save)))

(defun flyspell-correct-word-before-point (&optional event opoint)
  "Pop up a menu of possible corrections for misspelled word before point.
If EVENT is non-nil, it is the mouse event that invoked this operation;
that controls where to put the menu.
If OPOINT is non-nil, restore point there after adjusting it for replacement."
  (interactive)
  ;; use the correct dictionary
  (flyspell-accept-buffer-local-defs)
  (or opoint (setq opoint (point)))
  (let ((cursor-location (point))
	(word (flyspell-get-word)))
    (if (consp word)
	(let ((start (car (cdr word)))
	      (end (car (cdr (cdr word))))
	      (word (car word))
	      poss ispell-filter)
	  ;; now check spelling of word.
	  (ispell-send-string "%\n")	;put in verbose mode
	  (ispell-send-string (concat "^" word "\n"))
	  ;; wait until ispell has processed word
	  (while (progn
		   (accept-process-output ispell-process)
		   (not (string= "" (car ispell-filter)))))
	  ;; Remove leading empty element
	  (setq ispell-filter (cdr ispell-filter))
	  ;; ispell process should return something after word is sent.
	  ;; Tag word as valid (i.e., skip) otherwise
	  (or ispell-filter
	      (setq ispell-filter '(*)))
	  (if (consp ispell-filter)
	      (setq poss (ispell-parse-output (car ispell-filter))))
	  (cond
	   ((or (eq poss t) (stringp poss))
	    ;; don't correct word
	    t)
	   ((null poss)
	    ;; ispell error
	    (error "Ispell: error in Ispell process"))
           (t
	    ;; The word is incorrect, we have to propose a replacement.
	    (flyspell-do-correct (flyspell-emacs-popup event poss word)
				 poss word cursor-location start end opoint)))
	  (ispell-pdict-save t)))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-do-correct ...                                      */
;;*---------------------------------------------------------------------*/
(defun flyspell-do-correct (replace poss word cursor-location start end save)
  "The popup menu callback."
  (cond ((eq replace 'ignore)
         (goto-char save)
	 nil)
	((eq replace 'save)
         (goto-char save)
	 (ispell-send-string (concat "*" word "\n"))
	 (ispell-send-string "#\n")
	 (flyspell-unhighlight-at cursor-location)
	 (setq ispell-pdict-modified-p '(t)))
	((or (eq replace 'buffer) (eq replace 'session))
	 (ispell-send-string (concat "@" word "\n"))
	 (add-to-list 'ispell-buffer-session-localwords word)
	 (or ispell-buffer-local-name ; session localwords might conflict
	     (setq ispell-buffer-local-name (buffer-name)))
	 (flyspell-unhighlight-at cursor-location)
	 (if (null ispell-pdict-modified-p)
	     (setq ispell-pdict-modified-p
		   (list ispell-pdict-modified-p)))
         (goto-char save)
	 (if (eq replace 'buffer)
	     (ispell-add-per-file-word-list word)))
	(replace
         (flyspell-unhighlight-at cursor-location)
	 (let ((old-max (point-max))
	       (new-word (if (atom replace)
			     replace
			   (car replace)))
	       (cursor-location (+ (- (length word) (- end start))
				   cursor-location)))
	   (unless (equal new-word (car poss))
             (delete-region start end)
             (goto-char start)
             (funcall flyspell-insert-function new-word)
             (if flyspell-abbrev-p
                 (flyspell-define-abbrev word new-word)))
           (flyspell-adjust-cursor-point save cursor-location old-max)))
        (t
         (goto-char save)
         nil)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-adjust-cursor-point ...                                  */
;;*---------------------------------------------------------------------*/
(defun flyspell-adjust-cursor-point (save cursor-location old-max)
  (if (>= save cursor-location)
      (let ((new-pos (+ save (- (point-max) old-max))))
	(goto-char (cond
		    ((< new-pos (point-min))
		     (point-min))
		    ((> new-pos (point-max))
		     (point-max))
		    (t new-pos))))
    (goto-char save)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-emacs-popup ...                                         */
;;*---------------------------------------------------------------------*/
(defun flyspell-emacs-popup (event poss word)
  "The Emacs popup menu."
  (if (and (not event)
           (display-mouse-p))
      (let* ((mouse-pos  (mouse-position))
	     (mouse-pos  (if (nth 1 mouse-pos)
			     mouse-pos
			   (set-mouse-position (car mouse-pos)
				 	       (/ (frame-width) 2) 2)
			   (mouse-position))))
	(setq event (list (list (car (cdr mouse-pos))
				(1+ (cdr (cdr mouse-pos))))
			  (car mouse-pos)))))
  (let* ((corrects   (flyspell-sort (car (cdr (cdr poss))) word))
	 (cor-menu   (if (consp corrects)
			 (mapcar (lambda (correct)
				   (list correct correct))
				 corrects)
		       '()))
	 (affix      (car (cdr (cdr (cdr poss)))))
	 show-affix-info
	 (base-menu  (let ((save (if (and (consp affix) show-affix-info)
				     (list
				      (list (concat "Save affix: " (car affix))
					    'save)
				      '("Accept (session)" session)
				      '("Accept (buffer)" buffer))
				   '(("Save word" save)
				     ("Accept (session)" session)
				     ("Accept (buffer)" buffer)))))
		       (if (consp cor-menu)
			   (append cor-menu (cons "" save))
			 save)))
	 (menu       (cons "flyspell correction menu" base-menu)))
    (car (x-popup-menu event
		       (list (format "%s [%s]" word (or ispell-local-dictionary
							ispell-dictionary))
			     menu)))))

;;*---------------------------------------------------------------------*/
;;*    Some example functions for real autocorrecting                   */
;;*---------------------------------------------------------------------*/
(defun flyspell-maybe-correct-transposition (beg end poss)
  "Check replacements for transposed characters.

If the text between BEG and END is equal to a correction suggested by
Ispell, after transposing two adjacent characters, correct the text,
and return t.

The third arg POSS is either the symbol `doublon' or a list of
possible corrections as returned by `ispell-parse-output'.

This function is meant to be added to `flyspell-incorrect-hook'."
  (when (consp poss)
    (catch 'done
      (let ((str (buffer-substring beg end))
	    (i 0) (len (- end beg)) tmp)
	(while (< (1+ i) len)
	  (setq tmp (aref str i))
	  (aset str i (aref str (1+ i)))
	  (aset str (1+ i) tmp)
          (when (member str (nth 2 poss))
	    (save-excursion
	      (goto-char (+ beg i 1))
	      (transpose-chars 1))
	    (throw 'done t))
	  (setq tmp (aref str i))
	  (aset str i (aref str (1+ i)))
	  (aset str (1+ i) tmp)
	  (setq i (1+ i))))
      nil)))

(defun flyspell-maybe-correct-doubling (beg end poss)
  "Check replacements for doubled characters.

If the text between BEG and END is equal to a correction suggested by
Ispell, after removing a pair of doubled characters, correct the text,
and return t.

The third arg POSS is either the symbol `doublon' or a list of
possible corrections as returned by `ispell-parse-output'.

This function is meant to be added to `flyspell-incorrect-hook'."
  (when (consp poss)
    (catch 'done
      (let ((str (buffer-substring beg end))
	    (i 0) (len (- end beg)))
	(while (< (1+ i) len)
	  (when (and (= (aref str i) (aref str (1+ i)))
		     (member (concat (substring str 0 (1+ i))
				     (substring str (+ i 2)))
			     (nth 2 poss)))
	    (goto-char (+ beg i))
	    (delete-char 1)
	    (throw 'done t))
	  (setq i (1+ i))))
      nil)))

;;*---------------------------------------------------------------------*/
;;*    flyspell-already-abbrevp ...                                     */
;;*---------------------------------------------------------------------*/
(defun flyspell-already-abbrevp (table word)
  (let ((sym (abbrev-symbol word table)))
    (and sym (symbolp sym))))

;;*---------------------------------------------------------------------*/
;;*    flyspell-change-abbrev ...                                       */
;;*---------------------------------------------------------------------*/
(defun flyspell-change-abbrev (table old new)
  (set (abbrev-symbol old table) new))

(provide 'flyspell)

;;; flyspell.el ends here

debug log:

solving ce788207cf ...
found ce788207cf in https://git.savannah.gnu.org/cgit/emacs.git

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

Code repositories for project(s) associated with this public inbox

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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).