summaryrefslogtreecommitdiff
path: root/macros/luatex/generic/luatexko/luatexko.lua
blob: 95d8fc1a846461c1fc877d888b627529e537e45c (plain)
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
-- luatexko.lua
--
-- Copyright (c) 2013-2020 Dohyun Kim <nomos at ktug org>
--                         Soojin Nam <jsunam at gmail com>
--
-- This work may be distributed and/or modified under the
-- conditions of the LaTeX Project Public License, either version 1.3c
-- of this license or (at your option) any later version.
-- The latest version of this license is in
--   http://www.latex-project.org/lppl.txt
-- and version 1.3c or later is part of all distributions of LaTeX
-- version 2006/05/20 or later.

luatexbase.provides_module {
  name        = 'luatexko',
  date        = '2020/03/20',
  version     = '2.8',
  description = 'typesetting Korean with LuaTeX',
  author      = 'Dohyun Kim, Soojin Nam',
  license     = 'LPPL v1.3+',
}

luatexko = luatexko or {}
local luatexko = luatexko

local dimensions      = node.dimensions
local end_of_math     = node.end_of_math
local getglue         = node.getglue
local getnext         = node.getnext
local getprev         = node.getprev
local getproperty     = node.getproperty
local has_attribute   = node.has_attribute
local has_glyph       = node.has_glyph
local insert_after    = node.insert_after
local insert_before   = node.insert_before
local nodecopy        = node.copy
local nodecount       = node.count
local nodefree        = node.free
local nodenew         = node.new
local noderemove      = node.remove
local nodeslide       = node.slide
local nodewrite       = node.write
local rangedimensions = node.rangedimensions
local setglue         = node.setglue
local setproperty     = node.setproperty
local unset_attribute = node.unset_attribute

local fontcurrent   = font.current
local fontfonts     = font.fonts
local fontgetfont   = font.getfont
local getparameters = font.getparameters

local texattribute = tex.attribute
local texcount     = tex.count
local texset       = tex.set
local texsp        = tex.sp

local set_macro = token.set_macro

local mathmax = math.max

local stringformat = string.format
local stringunpack = string.unpack

local tableconcat = table.concat
local tableinsert = table.insert
local tableunpack = table.unpack

local add_to_callback       = luatexbase.add_to_callback
local attributes            = luatexbase.attributes
local call_callback         = luatexbase.call_callback
local callback_descriptions = luatexbase.callback_descriptions
local create_callback       = luatexbase.create_callback
local module_warning        = luatexbase.module_warning
local new_user_whatsit      = luatexbase.new_user_whatsit
local registernumber        = luatexbase.registernumber
local remove_from_callback  = luatexbase.remove_from_callback

local function warning (...)
  return module_warning("luatexko", stringformat(...))
end

local dirid     = node.id"dir"
local discid    = node.id"disc"
local glueid    = node.id"glue"
local glyphid   = node.id"glyph"
local hlistid   = node.id"hlist"
local kernid    = node.id"kern"
local mathid    = node.id"math"
local penaltyid = node.id"penalty"
local ruleid    = node.id"rule"
local vlistid   = node.id"vlist"
local whatsitid = node.id"whatsit"
local literal_whatsit = node.subtype"pdf_literal"
local directmode = 2
local fontkern   = 0
local userkern   = 1
local italcorr   = 3
local lua_number = 100
local lua_value  = 108
local spaceskip  = 13
local nohyphen = registernumber"l@nohyphenation" or -1 -- verbatim
local langkor  = registernumber"koreanlanguage"  or 16383

local hangulfontattr   = attributes.luatexkohangulfontattr
local hanjafontattr    = attributes.luatexkohanjafontattr
local fallbackfontattr = attributes.luatexkofallbackfontattr
local autojosaattr     = attributes.luatexkoautojosaattr
local classicattr      = attributes.luatexkoclassicattr
local dotemphattr      = attributes.luatexkodotemphattr
local ulineattr        = attributes.luatexkoulineattr
local rubyattr         = attributes.luatexkorubyattr
local hangulbyhangulattr = attributes.luatexkohangulbyhangulattr
local hanjabyhanjaattr   = attributes.luatexkohanjabyhanjaattr

local vert_classic = 1
local SC_classic   = 2

local stretch_f = 5/100 -- should be consistent for ruby

local function get_font_data (fontid)
  return fontgetfont(fontid) or fontfonts[fontid] or {}
end

local function get_font_param (f, key)
  local t
  if type(f) == "number" then
    t = getparameters(f)
    if t and t[key] then
      return t[key]
    end
    f = get_font_data(f)
  end
  if type(f) == "table" then
    t = f.parameters
    return t and t[key]
  end
end

local function option_in_font (fontdata, optionname)
  if type(fontdata) == "number" then
    fontdata = get_font_data(fontdata)
  end
  if fontdata.specification then
    return fontdata.specification.features.normal[optionname]
  end
end

local function font_opt_dim (fd, optname)
  local dim = option_in_font(fd, optname)
  if dim then
    local params
    if type(fd) == "number" then
      params = getparameters(fd)
    else
      params = fd.parameters
    end
    local m, u = dim:match"^(.+)(e[mx])%s*$"
    if m and u and params then
      if u == "em" then
        dim = m * params.quad
      else
        dim = m * params.x_height
      end
    else
      dim = texsp(dim)
    end
    return dim
  end
end

local function is_harf (f)
  if type(f) == "number" then
    f = get_font_data(f)
  end
  return f.hb
end

local function is_not_harf (f)
  if option_in_font(f, "mode") == "harf" then -- mode=harf with non-luahbtex
    return false
  end
  return not is_harf(f)
end

local function harf_reordered_tonemark (curr)
  if is_harf(curr.font) then
    local props = getproperty(curr) or {}
    local actualtext = props.luaotfload_startactualtext or ""
    return actualtext:find"302[EF]$"
  end
end

local os2tag = luaotfload.harfbuzz and luaotfload.harfbuzz.Tag.new"OS/2"

local font_options = {
  charraise = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local dim = font_opt_dim(fid, "charraise") or false
      t[fid] = dim
      return dim
    end
  end }),

  intercharacter = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local dim = font_opt_dim(fid, "intercharacter") or false
      t[fid] = dim
      return dim
    end
  end }),

  intercharstretch = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local dim = font_opt_dim(fid, "intercharstretch") or false
      t[fid] = dim
      return dim
    end
  end }),

  interhangul = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local dim = font_opt_dim(fid, "interhangul") or false
      t[fid] = dim
      return dim
    end
  end }),

  interlatincjk = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local dim = font_opt_dim(fid, "interlatincjk") or false
      t[fid] = dim
      return dim
    end
  end }),

  en_size = setmetatable( {}, { __index = function(t, fid)
    if fid then
      val = (get_font_param(fid, "quad") or 655360)/2
      t[fid] = val
      return val
    end
    return 327680
  end } ),

  hangulspaceskip = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local newwd
      if is_harf(fid) then
        newwd = getparameters(fid) or false
        if newwd then
          newwd = { newwd.space, newwd.space_stretch, newwd.space_shrink }
        end
      else
        local newsp = nodenew(glyphid)
        newsp.char, newsp.font = 32, fid
        newsp = nodes.simple_font_handler(newsp)
        newwd = newsp and newsp.width or false
        if newwd then
          newwd = { texsp(newwd), texsp(newwd/2), texsp(newwd/3) }
        end
        if newsp then nodefree(newsp) end
      end
      t[fid] = newwd
      return newwd
    end
  end } ),

  monospaced = setmetatable( {}, { __index = function(t, fid)
    if fid then
      -- space_stretch has been set to zero by fontloader
      if get_font_param(fid, "space_stretch") == 0 then
        t[fid] = true; return true
      end
      -- but not in harf mode; so we simply test widths of some glyphs
      if is_harf(fid) then
        local chars = get_font_data(fid).characters or {}
        local i, M = chars[0x69], chars[0x4D]
        if i and M and i.width == M.width then
          t[fid] = true; return true
        end
      end
      t[fid] = false; return false
    end
  end } ),

  tonemarkwidth = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local hwidth
      -- check horizontal width; vertical width is mostly non-zero
      local fontdata     = get_font_data(fid)
      local shared       = fontdata.shared      or {}
      local rawdata      = shared.rawdata       or {}
      local descriptions = rawdata.descriptions or {}
      local description  = descriptions[0x302E] or {}
      hwidth = description.width or 0
      t[fid] = hwidth
      return hwidth
    end
    return 0
  end } ),

  asc_desc = setmetatable( {}, { __index = function(t, fid)
    if fid then
      local asc, desc
      -- luaharfbuzz's Font:get_h_extents() gets ascender value from hhea table;
      -- Node mode's parameters.ascender is gotten from OS/2 table.
      -- TypoAscender in OS/2 table seems to be more suitable for our purpose.
      local hb = is_harf(fid)
      if hb and os2tag then
        local hbface = hb.shared.face
        local tags = hbface:get_table_tags()
        local hasos2 = false
        for _,v in ipairs(tags) do
          if v == os2tag then
            hasos2 = true
            break
          end
        end
        if hasos2 then
          local os2 = hbface:get_table(os2tag)
          local length = os2:get_length()
          if length > 69 then -- sTypoAscender (int16)
            local data = os2:get_data()
            local typoascender  = stringunpack(">h", data, 69)
            local typodescender = stringunpack(">h", data, 71)
            asc  =  typoascender  * hb.scale
            desc = -typodescender * hb.scale
          end
        end
      end
      asc  = asc  or get_font_param(fid, "ascender")  or false
      desc = desc or get_font_param(fid, "descender") or false
      t[fid] = { asc, desc }
      return { asc, desc }
    end
    return { }
  end } ),
}

local function char_in_font(fontdata, char)
  if type(fontdata) == "number" then
    fontdata = get_font_data(fontdata)
  end
  if fontdata.characters then
    return fontdata.characters[char]
  end
end

local function my_node_props (n)
  local t = getproperty(n)
  if not t then
    t = {}
    setproperty(n, t)
  end
  t.luatexko = t.luatexko or {}
  return t.luatexko
end

local active_processes = {}

local function is_hanja (c)
  return c >= 0x3400 and c <= 0xA4C6
  or     c >= 0xF900 and c <= 0xFAD9
  or     c >= 0x20000 and c <= 0x2FFFD
  or     c >= 0x2E81 and c <= 0x2FD5
end

local function is_hangul (c)
  return c >= 0xAC00 and c <= 0xD7A3
end

local function is_chosong (c)
  return c >= 0x1100 and c <= 0x115F
  or     c >= 0xA960 and c <= 0xA97C
end

local function is_jungsong (c)
  return c >= 0x1160 and c <= 0x11A7
  or     c >= 0xD7B0 and c <= 0xD7C6
end

local function is_jongsong (c)
  return c >= 0x11A8 and c <= 0x11FF
  or     c >= 0xD7CB and c <= 0xD7FB
end

local hangul_tonemark = {
  [0x302E] = true, [0x302F] = true,
}

local function is_compat_jamo (c)
  return c >= 0x3131 and c <= 0x318E
end

local function is_unicode_var_sel (c)
  return c >= 0xFE00  and c <= 0xFE0F
  or     c >= 0xE0100 and c <= 0xE01EF
end

local function is_cjk_combining (c)
  return c >= 0x302A and c <= 0x302F
  or     c >= 0x3099 and c <= 0x309C
  or     c >= 0xFF9E and c <= 0xFF9F
  or     is_unicode_var_sel(c)
end

local function is_noncjk_char (c)
  return c >= 0x30 and c <= 0x39
  or     c >= 0x41 and c <= 0x5A
  or     c >= 0x61 and c <= 0x7A
  or     c >= 0xC0 and c <= 0xD6
  or     c >= 0xD8 and c <= 0xF6
  or     c >= 0xF8 and c <= 0x10FC
  or     c >= 0x1200 and c <= 0x1FFE
  or     c >= 0xA4D0 and c <= 0xA877
  or     c >= 0xAB01 and c <= 0xABBF
  or     c >= 0xFB00 and c <= 0xFDFD
  or     c >= 0xFE70 and c <= 0xFEFC
end

local function is_kana (c)
  return c >= 0x3041 and c <= 0x3096
  or     c >= 0x30A1 and c <= 0x30FA
  or     c >= 0x31F0 and c <= 0x31FF
  or     c >= 0xFF66 and c <= 0xFF6F
  or     c >= 0xFF71 and c <= 0xFF9D
  or     c == 0x309F or c == 0x30FF
  or     c >= 0x1B000 and c <= 0x1B16F
end

local function is_hangul_jamo (c)
  return is_hangul(c)
  or     is_compat_jamo(c)
  or     is_chosong(c)
  or     is_jungsong(c)
  or     is_jongsong(c)
end

-- font fallback

local force_hangul = {
  [0x21] = true, -- !
  [0x27] = true, -- '
  [0x28] = true, -- (
  [0x29] = true, -- )
  [0x2C] = true, -- ,
  [0x2E] = true, -- .
  [0x3A] = true, -- :
  [0x3B] = true, -- ;
  [0x3F] = true, -- ?
  [0x60] = true, -- `
  [0xB7] = true, -- ·
  [0x2014] = true, -- —
  [0x2015] = true, -- ―
  [0x2018] = true, -- ‘
  [0x2019] = true, -- ’
  [0x201C] = true, -- “
  [0x201D] = true, -- ”
  [0x2026] = true, -- …
  [0x203B] = true, -- ※
}
luatexko.forcehangulchars = force_hangul

local forcehf_f, forcehf_id = new_user_whatsit("forcehf","luatexko")

function luatexko.updateforcehangul (value)
  local what = forcehf_f()
  what.type  = lua_value -- function
  what.value = value
  nodewrite(what)
end

local function hangul_space_skip (curr, newfont)
  if curr.lang ~= nohyphen and curr.font ~= newfont then
    local n = getnext(curr)
    if n and n.id == glueid and n.subtype == spaceskip then
      local params = getparameters(curr.font)
      local oldwd, oldst, oldsh, oldsto, oldsho = getglue(n)
      if params
        and oldwd == params.space
        and oldst == params.space_stretch
        and oldsh == params.space_shrink
        and oldsto == 0
        and oldsho == 0 then -- not user's spaceskip

        local newwd = font_options.hangulspaceskip[newfont]
        if newwd then
          setglue(n, newwd[1], newwd[2], newwd[3])
        end
      end
    end
  end
end

local function process_fonts (head)
  local curr = head
  while curr do
    local id = curr.id
    if id == glyphid then
      local props = my_node_props(curr)
      if not props.unicode then

        local c = curr.char

        if is_cjk_combining(c) then
          local p = getprev(curr)
          if p.id == glyphid and curr.font ~= p.font then
            hangul_space_skip(curr, p.font)
            curr.font = p.font
          end

          if not active_processes.reorderTM and
             hangul_tonemark[c] and
             is_not_harf(curr.font) and
             option_in_font(curr.font, "script") == "hang" then
            luatexko.activate("reorderTM") -- activate reorderTM here
          end

        else
          local hf  = has_attribute(curr, hangulfontattr) or false
          local hjf = has_attribute(curr, hanjafontattr)  or false
          local fontdata = get_font_data(curr.font)
          local format   = fontdata.format
          local encode   = fontdata.encodingbytes
          local widefont = encode == 2 or format == "opentype" or format == "truetype"

          if hf and widefont and force_hangul[c] and curr.lang ~= nohyphen and not font_options.monospaced[curr.font] then
            curr.font = hf
          elseif hf and has_attribute(curr, hangulbyhangulattr) and is_hangul_jamo(c) then
            hangul_space_skip(curr, hf)
            curr.font = hf
          elseif hjf and has_attribute(curr, hanjabyhanjaattr) and is_hanja(c) then
            hangul_space_skip(curr, hjf)
            curr.font = hjf
          elseif not char_in_font(fontdata, c) then
            local fbf = has_attribute(curr, fallbackfontattr) or false
            for _,f in ipairs{ hf, hjf, fbf } do
              if f and char_in_font(f, c) then
                hangul_space_skip(curr, f)
                curr.font = f
                break
              end
            end
          end
        end

        props.unicode = c
      end
    elseif id == discid then
      curr.pre     = process_fonts(curr.pre)
      curr.post    = process_fonts(curr.post)
      curr.replace = process_fonts(curr.replace)
    elseif id == mathid then
      curr = end_of_math(curr)
    elseif id      == whatsitid  and
      curr.user_id == forcehf_id and
      curr.type    == lua_value  then

      local value = curr.value
      if type(value) == "function" then
        value()
      end
    end
    curr = getnext(curr)
  end
  return head
end

-- linebreak

local intercharclass = { [0] =
  { [0] = nil,    {1,1},  nil,    {.5,.5} },
  { [0] = nil,    nil,    nil,    {.5,.5} },
  { [0] = {1,1},  {1,1},  nil,    {.5,.5}, nil,    {1,1},  {1,1} },
  { [0] = {.5,.5},{.5,.5},{.5,.5},{1,.5},  {.5,.5},{.5,.5},{.5,.5} },
  { [0] = {1,0},  {1,0},  nil,    {1.5,.5},nil,    {1,0},  {1,0} },
  { [0] = nil,    {1,1},  nil,    {.5,.5} },
  { [0] = {1,1},  {1,1},  nil,    {.5,.5} },
  { }, -- vertical colon
}

local charclass = setmetatable({
  [0x2018] = 1, [0x201C] = 1, [0x2329] = 1, [0x3008] = 1,
  [0x300A] = 1, [0x300C] = 1, [0x300E] = 1, [0x3010] = 1,
  [0x3014] = 1, [0x3016] = 1, [0x3018] = 1, [0x301A] = 1,
  [0x301D] = 1, [0xFE17] = 1, [0xFE35] = 1, [0xFE37] = 1,
  [0xFE39] = 1, [0xFE3B] = 1, [0xFE3D] = 1, [0xFE3F] = 1,
  [0xFE41] = 1, [0xFE43] = 1, [0xFE47] = 1, [0xFF08] = 1,
  [0xFF3B] = 1, [0xFF5B] = 1, [0xFF5F] = 1, [0xFF62] = 1,
  --
  [0x2019] = 2, [0x201D] = 2, [0x232A] = 2, [0x3001] = 2,
  [0x3009] = 2, [0x300B] = 2, [0x300D] = 2, [0x300F] = 2,
  [0x3011] = 2, [0x3015] = 2, [0x3017] = 2, [0x3019] = 2,
  [0x301B] = 2, [0x301E] = 2, [0x301F] = 2, [0xFE10] = 2,
  [0xFE11] = 2, [0xFE18] = 2, [0xFE36] = 2, [0xFE38] = 2,
  [0xFE3A] = 2, [0xFE3C] = 2, [0xFE3E] = 2, [0xFE40] = 2,
  [0xFE42] = 2, [0xFE44] = 2, [0xFE48] = 2, [0xFF09] = 2,
  [0xFF0C] = 2, [0xFF3D] = 2, [0xFF5D] = 2, [0xFF60] = 2,
  [0xFF63] = 2, [0xFF64] = 2,
  --
  [0x00B7] = 3, [0x30FB] = 3, [0xFF1A] = 3, [0xFF1B] = 3,
  [0xFF65] = 3,
  --
  [0x3002] = 4, [0xFE12] = 4, [0xFF0E] = 4, [0xFF61] = 4,
  --
  [0x2015] = 5, [0x2025] = 5, [0x2026] = 5, [0xFE19] = 5,
  [0xFE30] = 5, [0xFE31] = 5,
  --
  [0xFE15] = 6, [0xFE16] = 6, [0xFF01] = 6, [0xFF1F] = 6,
}, { __index = function() return 0 end })

local SC_charclass = setmetatable({
  [0xFF01] = 4, [0xFF1A] = 4, [0xFF1B] = 4, [0xFF1F] = 4,
}, { __index = charclass })

local vert_charclass = setmetatable({
  [0xFF1A] = 7, -- 0xFE13
  [0xFF1B] = 7, -- 0xFE14
}, { __index = charclass })

local function get_char_class (c, classic)
  if classic == vert_classic then
    return vert_charclass[c]
  elseif classic == SC_classic then
    return SC_charclass[c]
  end
  return charclass[c]
end

local breakable_after = setmetatable({
  [0x21] = true,   [0x22] = true,   [0x25] = true,   [0x27] = true,
  [0x29] = true,   [0x2C] = true,   [0x2D] = true,   [0x2E] = true,
  [0x3A] = true,   [0x3B] = true,   [0x3E] = true,   [0x3F] = true,
  [0x5D] = true,   [0x7D] = true,   [0x7E] = true,   [0xBB] = true,
  [0x2013] = true, [0x2014] = true, [0x25A1] = true, [0x25CB] = true,
  [0x2E80] = true, [0x3003] = true, [0x3005] = true, [0x3007] = true,
  [0x301C] = true, [0x3035] = true, [0x303B] = true, [0x303C] = true,
  [0x309D] = true, [0x309E] = true, [0x30A0] = true, [0x30FC] = true,
  [0x30FD] = true, [0x30FE] = true, [0xFE13] = true, [0xFE14] = true,
  [0xFE32] = true, [0xFE50] = true, [0xFE51] = true, [0xFE52] = true,
  [0xFE54] = true, [0xFE55] = true, [0xFE57] = true, [0xFE57] = true,
  [0xFE58] = true, [0xFE5A] = true, [0xFE5C] = true, [0xFE5E] = true,
  [0xFF1E] = true, [0xFF5E] = true, [0xFF70] = true,
},{ __index = function (_,c)
  return is_hangul_jamo(c) -- chosong also is breakable_after
  or     is_noncjk_char(c)
  or     is_hanja(c)
  or     is_cjk_combining(c)
  or     is_kana(c)
  or     charclass[c] >= 2
end })
luatexko.breakableafter = breakable_after

local breakable_before = setmetatable({
  [0x28] = true,   [0x3C] = true,   [0x5B] = true,   [0x60] = true,
  [0x7B] = true,   [0xAB] = true,   [0x25A1] = true, [0x25CB] = true,
  [0x3007] = true, [0xFE59] = true, [0xFE5B] = true, [0xFE5D] = true,
  [0xFF1C] = true,
  -- small kana
  [0x3041] = 1000, [0x3043] = 1000, [0x3045] = 1000, [0x3047] = 1000,
  [0x3049] = 1000, [0x3063] = 1000, [0x3083] = 1000, [0x3085] = 1000,
  [0x3087] = 1000, [0x308E] = 1000, [0x3095] = 1000, [0x3096] = 1000,
  [0x30A1] = 1000, [0x30A3] = 1000, [0x30A5] = 1000, [0x30A7] = 1000,
  [0x30A9] = 1000, [0x30C3] = 1000, [0x30E3] = 1000, [0x30E5] = 1000,
  [0x30E7] = 1000, [0x30EE] = 1000, [0x30F5] = 1000, [0x30F6] = 1000,
  [0x31F0] = 1000, [0x31F1] = 1000, [0x31F2] = 1000, [0x31F3] = 1000,
  [0x31F4] = 1000, [0x31F5] = 1000, [0x31F6] = 1000, [0x31F7] = 1000,
  [0x31F8] = 1000, [0x31F9] = 1000, [0x31FA] = 1000, [0x31FB] = 1000,
  [0x31FC] = 1000, [0x31FD] = 1000, [0x31FE] = 1000, [0x31FF] = 1000,
  [0xFF67] = 1000, [0xFF68] = 1000, [0xFF69] = 1000, [0xFF6A] = 1000,
  [0xFF6B] = 1000, [0xFF6C] = 1000, [0xFF6D] = 1000, [0xFF6E] = 1000,
  [0xFF6F] = 1000,  [0x1B150] = 1000, [0x1B151] = 1000, [0x1B152] = 1000,
  [0x1B164] = 1000, [0x1B165] = 1000, [0x1B166] = 1000, [0x1B167] = 1000,
},{ __index = function(_,c)
  return is_hangul(c)
  or     is_compat_jamo(c)
  or     is_chosong(c)
  or     is_hanja(c)
  or     is_kana(c)
  or     charclass[c] == 1
end
})
luatexko.breakablebefore = breakable_before

local allowbreak_false_nodes = {
  [hlistid]   = true,
  [vlistid]   = true,
  [ruleid]    = true,
  [discid]    = true,
  [glueid]    = true,
  [penaltyid] = true,
}

local function is_blocking_node (curr)
  local id, subtype = curr.id, curr.subtype
  return allowbreak_false_nodes[id] or id == kernid and subtype == userkern
end

local function hbox_char_font (box, init, glyfonly)
  local mynext = init and getnext  or getprev
  local curr   = init and box.list or nodeslide(box.list)
  while curr do
    local id = curr.id
    if id == glyphid then
      local c = my_node_props(curr).unicode or curr.char
      if c and not is_cjk_combining(c) then
        return c, curr.font
      end
    elseif id == hlistid and curr.list then
      return hbox_char_font(curr, init, glyfonly)
    elseif not glyfonly and is_blocking_node(curr) then
      return
    end
    curr = mynext(curr)
  end
end

local function get_actualtext (curr)
  local actual = my_node_props(curr).startactualtext
  if type(actual) == "table" then
     return actual.init, actual[1], actual[#actual]
  end
end

local function goto_end_actualtext (curr)
  local n = getnext(curr)
  while n do
    if n.id == whatsitid and
       n.mode == directmode and
       my_node_props(n).endactualtext then
      curr = n; break
    end
    n = getnext(n)
  end
  return curr
end

local function insert_glue_before (head, curr, par, br, brb, classic, ict, dim, fid)
  local pn = nodenew(penaltyid)
  if not br then
    pn.penalty = 10000
  elseif type(brb) == "number" then
    pn.penalty = brb
  elseif par and nodecount(glyphid, curr) <= 2 then
    pn.penalty = 1000 -- supress orphan
  else
    pn.penalty = 50
  end

  dim = dim or 0
  local gl = nodenew(glueid)
  local en = font_options.en_size[fid]
  if ict then
    en = classic and en or en/4
    setglue(gl, en * ict[1] + dim, nil, en * ict[2])
  else
    local str = font_options.intercharstretch[fid] or stretch_f*en
    setglue(gl, dim, str, str*0.6)
  end

  head = insert_before(head, curr, pn)
  return insert_before(head, curr, gl)
end

local function maybe_linebreak (head, curr, pc, pcl, cc, old, fid, par)
  local ccl = get_char_class(cc, old)
  if pc and cc and curr.lang ~= nohyphen then
    local ict = intercharclass[pcl][ccl]
    local brb = breakable_before[cc]
    local br  = brb and breakable_after[pc]
    local dim = font_options.intercharacter[fid]
    if ict or br or dim and (pcl >= 1 or ccl >= 1) then
      head = insert_glue_before(head, curr, par, br, brb, old, ict, dim, fid)
    end
  end
  return head, cc, ccl
end

local function process_linebreak (head, par)
  local curr, pc, pcl = head, false, 0
  while curr do
    local id = curr.id
    if id == glyphid then
      local c = my_node_props(curr).unicode or curr.char
      if c and not is_unicode_var_sel(c) then
        local old = has_attribute(curr, classicattr)
        head, pc, pcl = maybe_linebreak(head, curr, pc, pcl, c, old, curr.font, par)
      end

    elseif id == hlistid and curr.list then
      local old = has_attribute(curr, classicattr)
      local c, f = hbox_char_font(curr, true)
      if c and f then
        head = maybe_linebreak(head, curr, pc, pcl, c, old, f, par)
      end
      pc = hbox_char_font(curr)
      pcl = pc and get_char_class(pc, old) or 0

    elseif id == whatsitid and curr.mode == directmode then
      local glyf, c, fin = get_actualtext(curr)
      if c and fin and glyf then
        local old = has_attribute(glyf, classicattr)
        head = maybe_linebreak(head, curr, pc, pcl, c, old, glyf.font, par)
        pc, pcl, curr = fin, 0, goto_end_actualtext(curr)
      end

    elseif id == mathid then
      pc, pcl, curr = 0x30, 0, end_of_math(curr)
    elseif id == dirid then
      pc, pcl = curr.dir:sub(1,1) == "-" and 0x30, 0 -- pop dir
    elseif is_blocking_node(curr) then
      pc, pcl = false, 0
    end
    curr = getnext(curr)
  end
  return head
end

-- compress punctuations

local function process_glyph_width (head)
  local curr = head
  while curr do
    local id = curr.id
    if id == glyphid then
      if curr.lang ~= nohyphen
        and option_in_font(curr.font, "compresspunctuations") then

        local cc = my_node_props(curr).unicode or curr.char
        local old = has_attribute(curr, classicattr)
        local class = get_char_class(cc, old)
        if class >= 1 and class <= 4 and
          (old or cc < 0x2000 or cc > 0x202F) then -- exclude general puncts

          -- harf-node always puts kern after the glyph
          local gpos = class == 1 and is_not_harf(curr.font) and getprev(curr) or getnext(curr)
          gpos = gpos and gpos.id == kernid and gpos.subtype == fontkern

          if not gpos then
            local wd = font_options.en_size[curr.font] - curr.width
            if wd ~= 0 then
              local k = nodenew(kernid) -- fontkern (subtype 0) is default
              k.kern = class == 3 and wd/2 or wd
              if class == 1 then
                head = insert_before(head, curr, k)
              elseif class == 2 or class == 4 then
                head, curr = insert_after(head, curr, k)
              else
                local k2 = nodecopy(k)
                head = insert_before(head, curr, k)
                head, curr = insert_after(head, curr, k2)
              end
            end
          end
        end
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  return head
end

-- interhangul & interlatincjk

local function is_cjk_char (c)
  return is_hangul_jamo(c)
  or     is_hanja(c)
  or     is_cjk_combining(c)
  or     is_kana(c)
  or     charclass[c] >= 1
  or     rawget(breakable_before, c) and c >= 0x2000
  or     rawget(breakable_after,  c) and c >= 0x2000
end

local function do_interhangul_option (head, curr, pc, c, fontid, par)
  local cc = (is_hangul(c) or is_compat_jamo(c) or is_chosong(c)) and 1 or 0

  if cc*pc == 1 and curr.lang ~= nohyphen then
    local dim = font_options.interhangul[fontid]
    if dim then
      head = insert_glue_before(head, curr, par, true, true, false, false, dim, fontid)
    end
  end

  return head, cc
end

local function process_interhangul (head, par)
  local curr, pc = head, 0
  while curr do
    local id = curr.id
    if id == glyphid then
      local c = my_node_props(curr).unicode or curr.char
      if c and not is_unicode_var_sel(c) then
        head, pc = do_interhangul_option(head, curr, pc, c, curr.font, par)

        if is_jungsong(c) or is_jongsong(c) or hangul_tonemark[c] then
          pc = 1
        end
      end

    elseif id == hlistid and curr.list then
      local c, f = hbox_char_font(curr, true)
      if c and f then
        head = do_interhangul_option(head, curr, pc, c, f, par)
      end
      c = hbox_char_font(curr)
      pc = c and is_hangul_jamo(c) and 1 or 0

    elseif id == whatsitid and curr.mode == directmode then
      local glyf, c = get_actualtext(curr)
      if c and glyf then
        head = do_interhangul_option(head, curr, pc, c, glyf.font, par)
        pc, curr = 1, goto_end_actualtext(curr)
      end

    elseif id == mathid then
      pc, curr = 0, end_of_math(curr)
    elseif is_blocking_node(curr) or id == dirid then
      pc = 0
    end
    curr = getnext(curr)
  end
  return head
end

local function do_interlatincjk_option (head, curr, pc, pf, pcl, c, cf, par)
  local cc = is_cjk_char(c) and 1 or is_noncjk_char(c) and 2 or 0
  local old = has_attribute(curr, classicattr)
  local ccl = get_char_class(c, old)

  if cc*pc == 2 and curr.lang ~= nohyphen then
    local brb = cc == 2 or breakable_before[c] -- numletter != br_before
    if brb then
      local f = cc == 1 and cf or pf
      local dim = font_options.interlatincjk[f]
      if dim then
        local ict = old and intercharclass[pcl][ccl] -- under classic env. only
        if ict then
          dim = font_options.intercharacter[f] or 0
        end
        head = insert_glue_before(head, curr, par, true, brb, old, ict, dim, f)
      end
    end
  end

  return head, cc, cf, ccl
end

local function process_interlatincjk (head, par)
  local curr, pc, pf, pcl = head, 0, 0, 0
  while curr do
    local id = curr.id
    if id == glyphid then
      local c = my_node_props(curr).unicode or curr.char
      if c and not is_unicode_var_sel(c) then
        head, pc, pf, pcl = do_interlatincjk_option(head, curr, pc, pf, pcl, c, curr.font, par)
        pc = breakable_after[c] and pc or 0
      end

    elseif id == hlistid and curr.list then
      local c, f = hbox_char_font(curr, true)
      if c and f then
        head = do_interlatincjk_option(head, curr, pc, pf, pcl, c, f, par)
      end
      c, f = hbox_char_font(curr)
      if c and breakable_after[c] then
        pc = is_cjk_char(c) and 1 or is_noncjk_char(c) and 2 or 0
      else
        pc = 0
      end
      pcl = c and get_char_class(c, has_attribute(curr, classicattr)) or 0
      pf  = f or 0

    elseif id == whatsitid and curr.mode == directmode then
      local glyf, c = get_actualtext(curr)
      if c and glyf then
        head, pc, pf, pcl = do_interlatincjk_option(head, curr, pc, pf, pcl, c, glyf.font, par)
        curr = goto_end_actualtext(curr)
      end

    elseif id == mathid then
      if pc == 1 then
        head = do_interlatincjk_option(head, curr, pc, pf, pcl, 0x30, pf, par)
      end
      pc, pf, pcl = 2, 0, 0
      curr = end_of_math(curr)

    elseif id == dirid then
      if pc == 1 and curr.dir:sub(1,1) == "+" then
        head = do_interlatincjk_option(head, curr, pc, pf, pcl, 0x30, pf, par)
        pc, pf, pcl = 0, 0, 0
      end

    elseif is_blocking_node(curr) then
      pc, pf, pcl = 0, 0, 0
    end
    curr = getnext(curr)
  end
  return head
end

-- remove classic spaces

local function process_remove_spaces (head)
  local curr, opt_name, to_free = head, "removeclassicspaces", {}
  while curr do
    local id = curr.id
    if id == glueid then
      if curr.subtype == spaceskip and has_attribute(curr, classicattr) then

        for k, v in pairs{ p = getprev(curr), n = getnext(curr) } do
          local ok
          while v do
            local id = v.id
            if id ~= whatsitid -- skip whatsit or kern except userkern
              and ( id ~= kernid or v.subtype == userkern ) then

              local vchar, vfont
              if id == glyphid and v.lang ~= nohyphen then
                local c = my_node_props(v).unicode or v.char or 0
                if is_unicode_var_sel(c) then
                  v = getprev(v) or v
                end
                vchar, vfont = my_node_props(v).unicode or v.char, v.font
              elseif id == hlistid and v.list then
                vchar, vfont = hbox_char_font(v, k == "n")
              end
              if vchar and vfont and option_in_font(vfont, opt_name) then
                ok = is_cjk_char(vchar)
              end

              break
            end
            v = k == "p" and getprev(v) or getnext(v)
          end
          if ok then
            head = noderemove(head, curr)
            tableinsert(to_free, curr)
            break
          end
        end
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  for _,v in ipairs(to_free) do nodefree(v) end
  return head
end

-- josa

local josa_table = {
    --          리을,   중성,   종성
    [0xAC00] = {0xC774, 0xAC00, 0xC774}, -- 가 = 이, 가, 이
    [0xC740] = {0xC740, 0xB294, 0xC740}, -- 은 = 은, 는, 은
    [0xC744] = {0xC744, 0xB97C, 0xC744}, -- 을 = 을, 를, 을
    [0xC640] = {0xACFC, 0xC640, 0xACFC}, -- 와 = 과, 와, 과
    [0xC73C] = {nil,    nil,    0xC73C}, -- 으(로) =   ,  , 으
    [0xC774] = {0xC774, nil,    0xC774}, -- 이(라) = 이,  , 이
}

local josa_code = setmetatable({
    [0x30] = 3,   [0x31] = 1,   [0x33] = 3,   [0x36] = 3,
    [0x37] = 1,   [0x38] = 1,   [0x4C] = 1,   [0x4D] = 3,
    [0x4E] = 3,   [0x6C] = 1,   [0x6D] = 3,   [0x6E] = 3,
    [0x2160] = 1, [0x2162] = 3, [0x2165] = 3, [0x2166] = 1,
    [0x2167] = 1, [0x2169] = 3, [0x216A] = 1, [0x216C] = 3,
    [0x216D] = 3, [0x216E] = 3, [0x216F] = 3, [0x2170] = 1,
    [0x2172] = 3, [0x2175] = 3, [0x2176] = 1, [0x2177] = 1,
    [0x2179] = 3, [0x217A] = 1, [0x217C] = 3, [0x217D] = 3,
    [0x217E] = 3, [0x217F] = 3, [0x2460] = 1, [0x2462] = 3,
    [0x2465] = 3, [0x2466] = 1, [0x2467] = 1, [0x2469] = 3,
    [0x246A] = 1, [0x246C] = 3, [0x246F] = 3, [0x2470] = 1,
    [0x2471] = 1, [0x2473] = 3, [0x2474] = 1, [0x2476] = 3,
    [0x2479] = 3, [0x247A] = 1, [0x247B] = 1, [0x247D] = 3,
    [0x247E] = 1, [0x2480] = 3, [0x2483] = 3, [0x2484] = 1,
    [0x2485] = 1, [0x2487] = 3, [0x2488] = 1, [0x248A] = 3,
    [0x248D] = 3, [0x248E] = 1, [0x248F] = 1, [0x2491] = 3,
    [0x2492] = 1, [0x2494] = 3, [0x2497] = 3, [0x2498] = 1,
    [0x2499] = 1, [0x249B] = 3, [0x24A7] = 1, [0x24A8] = 3,
    [0x24A9] = 3, [0x24C1] = 1, [0x24C2] = 3, [0x24C3] = 3,
    [0x24DB] = 1, [0x24DC] = 3, [0x24DD] = 3, [0x3139] = 1,
    [0x3203] = 1, [0x3263] = 1, [0xFF10] = 3, [0xFF11] = 1,
    [0xFF13] = 3, [0xFF16] = 3, [0xFF17] = 1, [0xFF18] = 1,
    [0xFF2C] = 1, [0xFF2D] = 3, [0xFF2E] = 3, [0xFF4C] = 1,
    [0xFF4D] = 3, [0xFF4E] = 3,
},{ __index = function(_,c)
  if is_hangul(c) then
    c = (c - 0xAC00) % 28 + 0x11A7
  end
  if is_chosong(c) then
    return c == 0x1105 and 1 or 3
  elseif is_jungsong(c) then
    return c ~= 0x1160 and 2
  elseif is_jongsong(c) then
    return c == 0x11AF and 1 or 3
  elseif is_noncjk_char(c) and c <= 0x7A
    or c >= 0x2160 and c <= 0x217F -- roman
    or c >= 0x2460 and c <= 0x24E9 -- ①
    or c >= 0x314F and c <= 0x3163 or c >= 0x3187 and c <= 0x318E -- ㅏ
    or c >= 0x320E and c <= 0x321E -- ㈎
    or c >= 0x326E and c <= 0x327F -- ㉮
    or c >= 0xFF10 and c <= 0xFF19 -- 0
    or c >= 0xFF21 and c <= 0xFF3A -- A
    or c >= 0xFF41 and c <= 0xFF5A -- a
    then return 2
  elseif c >= 0x3131 and c <= 0x314E or c >= 0x3165 and c <= 0x3186 -- ㄱ
    or c >= 0x3200 and c <= 0x320D -- ㈀
    or c >= 0x3260 and c <= 0x326D -- ㉠
    then return 3
  end
end })

local function prevjosacode (n, parenlevel, ignore_parens)
  local josacode
  while n do
    local id = n.id
    if id == glyphid then
      local c = my_node_props(n).unicode or n.char -- beware hlist/vlist
      if ignore_parens and c == 0x29 then -- )
        parenlevel = parenlevel + 1
      elseif ignore_parens and c == 0x28 then -- (
        parenlevel = parenlevel - 1
      elseif parenlevel <= 0 then
        josacode = josa_code[c]
        if josacode then break end
      end
    elseif id == hlistid or id == vlistid then
      local list = n.list
      if list then
        josacode, parenlevel = prevjosacode(nodeslide(list), parenlevel, ignore_parens)
        if josacode then break end
      end
    end
    n = getprev(n)
  end
  return josacode, parenlevel
end

local function process_josa (head)
  local curr, tofree = head, {}
  while curr do
    local id = curr.id
    if id == glyphid then
      local autojosaattr = has_attribute(curr, autojosaattr)
      if autojosaattr then
        local cc = curr.char
        if cc == 0xC774 then
          local n = getnext(curr)
          if n and n.char and is_hangul(n.char) then
          else
            cc = 0xAC00
          end
        end
        local t = josa_table[cc]
        if t then
          cc = t[prevjosacode(getprev(curr), 0, autojosaattr > 0) or 3]
          if cc then
            curr.char = cc
          else
            head = noderemove(head, curr)
            tableinsert(tofree, curr)
          end
        end
        unset_attribute(curr, autojosaattr)
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  for _,v in ipairs(tofree) do nodefree(v) end
  return head
end

-- dotemph

local function shift_put_top (bot, top)
  local shift = top.shift or 0

  if bot.id == hlistid then
    bot = has_glyph(bot.list) or {}
  end
  local bot_off = bot.yoffset or 0

  if bot_off ~= 0 then
    if top.id == hlistid then
      top = has_glyph(top.list) or {}
    end
    local top_off = top.yoffset or 0

    return shift + top_off - bot_off
  end

  return shift
end

local dotemphbox = {}
luatexko.dotemphbox = dotemphbox

local dotemph_f, dotemph_id = new_user_whatsit("dotemph","luatexko")

function luatexko.dotemphboundary (i)
  local what = dotemph_f()
  what.type  = lua_number
  what.value = i
  nodewrite(what)
end

local function process_dotemph (head)
  local curr = head
  while curr do
    if curr.list then
      curr.list = process_dotemph(curr.list)

    elseif curr.id == glyphid then
      local dotattr = has_attribute(curr, dotemphattr)
      if dotattr then
        local c = my_node_props(curr).unicode or curr.char
        if is_hangul(c)      or
           is_compat_jamo(c) or
           is_chosong(c)     or
           is_hanja(c)       or
           is_kana(c)        then

          -- harf font: skip reordered tone mark
          if harf_reordered_tonemark(curr) then
            curr = getnext(curr)
          end

          local currwd = curr.width
          if currwd >= font_options.en_size[curr.font] then
            local box = nodecopy(dotemphbox[dotattr]).list
            -- bypass unwanted nodes injected by some other packages
            while box.id ~= hlistid do
              warning[[\dotemph should be an hbox]]
              box = getnext(box)
            end

            local shift = (currwd - box.width)/2
            if shift ~= 0 then
              local list = box.list
              local k = nodenew(kernid)
              k.kern = shift
              box.list = insert_before(list, list, k)
            end

            -- consider charraise
            box.shift = shift_put_top(curr, box)

            box.width = 0
            head = insert_before(head, curr, box)
          end
        end
      end

    elseif curr.id == whatsitid  and
      curr.user_id == dotemph_id and
      curr.type    == lua_number then

      local val = curr.value
      nodefree(dotemphbox[val])
      dotemphbox[val] = nil
    end
    curr = getnext(curr)
  end
  return head
end

-- uline

function luatexko.get_strike_out_down (box)
  local c, f = hbox_char_font(box, true, true) -- ignore blocking nodes
  if c and f then
    local down
    local ex = get_font_param(f, "x_height") or texsp"1ex"
    if is_cjk_char(c) then
      local ascender, descender = tableunpack(font_options.asc_desc[f])
      if ascender and descender then
        down = descender - (ascender + descender)/2
      else
        down = -0.667*ex
      end
    else
      down = -0.5*ex
    end
    local raise = font_options.charraise[f] or 0
    return down - raise
  end
  return -texsp"0.5ex"
end

local uline_f, uline_id = new_user_whatsit("uline","luatexko")

function luatexko.ulboundary (i, n, subtype)
  local what = uline_f()
  if n then
    while n.id ~= ruleid and n.id ~= hlistid and n.id ~= vlistid do
      warning[[\markoverwith should be a rule or a box]]
      n = getnext(n)
    end
    what.type  = lua_value -- table
    what.value = { i, nodecopy(n), subtype }
  else
    what.type  = lua_number
    what.value = i
  end
  nodewrite(what)
end

local white_nodes = {
  [glueid]    = true,
  [penaltyid] = true,
  [kernid]    = true,
  [whatsitid] = true,
}

local function skip_white_nodes (n, ltr)
  local nextnode = ltr and getnext or getprev
  while n do
    if not white_nodes[n.id] then break end
    n = nextnode(n)
  end
  return n
end

local function draw_uline (head, curr, parent, t, final)
  local start, list, subtype = t.start or head, t.list, t.subtype
  start = skip_white_nodes(start, true)
  if final and start then
    nodeslide(start) -- to get correct getprev.
  end
  curr  = skip_white_nodes(curr)
  if start and curr then
    curr = getnext(curr) or curr
    local len = parent and rangedimensions(parent, start, curr)
                       or  dimensions(start, curr)
    if len and len ~= 0 then
      local g = nodenew(glueid)
      setglue(g, len)
      g.subtype = subtype
      g.leader  = final and list or nodecopy(list)
      local k = nodenew(kernid)
      k.kern = -len
      head = insert_before(head, start, g)
      head = insert_before(head, start, k)
    end
  end
  return head
end

local ulitems = {}

local function process_uline (head, parent, level)
  local curr, level, attr = head, level or 0
  while curr do
    if curr.list then
      curr.list = process_uline(curr.list, curr, level+1)

    elseif curr.id == whatsitid and curr.user_id == uline_id then

      local value = curr.value
      if curr.type == lua_value then
        local count, list, subtype = tableunpack(value)
        ulitems[count] = {
          list    = list,
          subtype = subtype,
          level   = level,
        }
      else
        local item = ulitems[value]
        if item then
          head = draw_uline(head, curr, parent, item, true)
          ulitems[value] = nil
          attr = nil
        end
      end

    else
      local currattr = has_attribute(curr, ulineattr)
      if currattr then
        local item = ulitems[currattr]
        if item and not item.start then
          item.start = curr
          attr = currattr
        end
      end

    end
    curr = getnext(curr)
  end

  if attr then
    local item = ulitems[attr]
    if item and item.level == level then
      head = draw_uline(head, nodeslide(head), parent, item)
      item.start = nil
    end
  end

  return head
end

-- ruby

local rubybox = {}
luatexko.rubybox = rubybox

function luatexko.getrubystretchfactor (box)
  local _, fid = hbox_char_font(box, true, true)
  local str = font_options.intercharstretch[fid]
  if str then
    local em = font_options.en_size[fid] * 2
    set_macro("luatexkostretchfactor", stringformat("%.4f", str/em/2))
  end
end

local function process_ruby_pre_linebreak (head)
  local curr = head
  while curr do
    local id = curr.id
    if id == hlistid then
      local rubyid = has_attribute(curr, rubyattr)
      if rubyid then
        local ruby_t = rubybox[rubyid]
        if ruby_t[3] then -- rubyoverlap
          local side = (ruby_t[1].width - curr.width)/2
          if side > 0 then -- ruby is wide
            local k, r = nodenew(kernid), nodenew(ruleid)
            k.subtype, k.kern = userkern, -side
            r.width, r.height, r.depth = side, 0, 0
            local k2, r2 = nodecopy(k), nodecopy(r)
            head = insert_before(head, curr, k)
            head = insert_before(head, curr, r)
            head, curr = insert_after(head, curr, r2)
            head, curr = insert_after(head, curr, k2)
          end
          ruby_t[3] = false
        end
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  return head
end

local function process_ruby_post_linebreak (head)
  local curr = head
  while curr do
    if curr.id == hlistid then
      local rubyid = has_attribute(curr, rubyattr)
      if rubyid then
        local ruby_t = rubybox[rubyid]
        local ruby = ruby_t and ruby_t[1]
        if ruby then
          local side = (curr.width - ruby.width)/2
          if side ~= 0 then
            local list = ruby.list
            local k = nodenew(kernid)
            k.kern = side
            ruby.list = insert_before(list, list, k)
          end
          ruby.width = 0

          -- consider charraise
          local shift = shift_put_top(curr, ruby)

          local _, f = hbox_char_font(curr, true, true)
          local ascender = tableunpack(font_options.asc_desc[f]) or curr.height
          ruby.shift = shift - ascender - ruby.depth - ruby_t[2] -- rubysep
          head = insert_before(head, curr, ruby)
        end
        ruby_t = nil
      elseif curr.list then
        curr.list = process_ruby_post_linebreak(curr.list)
      end
    elseif curr.list then
      curr.list = process_ruby_post_linebreak(curr.list)
    end
    curr = getnext(curr)
  end
  return head
end

-- reorder tone marks

local function conv_tounicode (uni)
  if uni < 0x10000 then
    return stringformat("%04X", uni)
  else -- surrogate
    uni = uni - 0x10000
    local high = uni // 0x400 + 0xD800
    local low  = uni %  0x400 + 0xDC00
    return stringformat("%04X%04X", high, low)
  end
end

local function pdfliteral_direct_actual (syllable)
  local data
  if syllable then
    local t = {}
    for _,v in ipairs(syllable) do
      t[#t + 1] = conv_tounicode(v)
    end
    data = stringformat("/Span<</ActualText<FEFF%s>>>BDC", tableconcat(t))
  else
    data = "EMC"
  end
  local what = nodenew(whatsitid, literal_whatsit)
  what.mode = directmode
  what.data = data
  if syllable then
    my_node_props(what).startactualtext = syllable
  else
    my_node_props(what).endactualtext = true
  end
  return what
end

local function process_reorder_tonemarks (head)
  local curr, init = head
  while curr do
    local id = curr.id
    if id == glyphid and
       is_not_harf(curr.font) and
       option_in_font(curr.font, "script") == "hang" then

      local fontdata = get_font_data(curr.font)
      local uni = my_node_props(curr).unicode or curr.char
      if is_hangul(uni) or is_chosong(uni) or uni == 0x25CC then
        init = curr
      elseif is_jungsong(uni) or is_jongsong(uni) then
      elseif hangul_tonemark[uni] then
        if init then
          local n, syllable = init, { init = init }
          while n do
            if n.id == glyphid then
              local u = my_node_props(n).unicode or n.char
              if u then tableinsert(syllable, u) end
            end
            if n == curr then break end
            n = getnext(n)
          end

          if #syllable > 1 and font_options.tonemarkwidth[curr.font] ~= 0 then
            local TM = curr

            local actual    = pdfliteral_direct_actual(syllable)
            local endactual = pdfliteral_direct_actual()
            head = insert_before(head, init, actual)
            head, curr = insert_after(head, curr, endactual)

            head = noderemove(head, TM)
            head = insert_before(head, init, TM)
          end

          init = nil
        elseif char_in_font(fontdata, 0x25CC) then -- isolated tone mark
          local dotcircle = nodecopy(curr)
          dotcircle.char = 0x25CC
          if font_options.tonemarkwidth[curr.font] ~= 0 then
            local actual    = pdfliteral_direct_actual{ init = curr, uni }
            local endactual = pdfliteral_direct_actual()
            head = insert_before(head, curr, actual)
            head, curr = insert_after(head, curr, dotcircle)
            head, curr = insert_after(head, curr, endactual)
          else
            head = insert_before(head, curr, dotcircle)
          end
        end

      else
        init = nil
      end
    elseif id == kernid and curr.subtype ~= userkern then -- skip
    elseif id == whatsitid then
      if curr.mode == directmode and my_node_props(curr).startactualtext then
        curr, init = goto_end_actualtext(curr), nil
      end
    else
      init = nil
      if id == mathid then curr = end_of_math(curr) end
    end
    curr = getnext(curr)
  end
  return head
end

-- vertical font

local streamreader = utilities.files
local openfile     = streamreader.open
local closefile    = streamreader.close
local readstring   = streamreader.readstring
local readulong    = streamreader.readcardinal4
local readushort   = streamreader.readcardinal2
local readfixed    = streamreader.readfixed4
local readshort    = streamreader.readinteger2
local setpos       = streamreader.setposition

local function get_otf_tables (f, subfont)
  if f then
    local sfntversion = readstring(f,4)
    if sfntversion == "ttcf" then
      local ttcversion = readfixed(f)
      local numfonts   = readulong(f)
      if subfont >= 1 and subfont <= numfonts then
        local offsets = {}
        for i = 1, numfonts do
          offsets[i] = readulong(f)
        end
        setpos(f, offsets[subfont])
        sfntversion = readstring(f,4)
      end
    end
    if sfntversion == "OTTO" or sfntversion == "true" or sfntversion == "\0\1\0\0" then
      local numtables     = readushort(f)
      local searchrange   = readushort(f)
      local entryselector = readushort(f)
      local rangeshift    = readushort(f)
      local tables        = {}
      for i= 1, numtables do
        local tag = readstring(f,4)
        tables[tag] = {
          checksum = readulong(f),
          offset   = readulong(f),
          length   = readulong(f),
        }
      end
      return tables
    end
  end
end

local function read_maxp (f, t)
  if f and t then
    setpos(f, t.offset)
    return {
      version   = readfixed(f),
      numglyphs = readushort(f),
    }
  end
end

local function read_vhea (f, t)
  if f and t then
    setpos(f, t.offset)
    return {
      version               = readfixed(f),
      ascent                = readshort(f),
      descent               = readshort(f),
      lineGap               = readshort(f),
      advanceheightmax      = readshort(f),
      mintopsidebearing     = readshort(f),
      minbottomsidebrearing = readshort(f),
      ymaxextent            = readshort(f),
      caretsloperise        = readshort(f),
      caretsloperun         = readshort(f),
      caretoffset           = readshort(f),
      reserved1             = readshort(f),
      reserved2             = readshort(f),
      reserved3             = readshort(f),
      reserved4             = readshort(f),
      metricdataformat      = readshort(f),
      numheights            = readushort(f),
    }
  end
end

local function read_vmtx (f, t, numofheights, numofglyphs)
  if f and t and numofheights and numofglyphs then
    setpos(f, t.offset)
    local vmtx = {}
    local height = 0
    for i = 0, numofheights-1 do
      height = readushort(f)
      vmtx[i] = {
        ht  = height,
        tsb = readshort(f),
      }
    end
    for i = numofheights, numofglyphs-1 do
      vmtx[i] = {
        ht  = height,
        tsb = readshort(f),
      }
    end
    return vmtx
  end
end

local tsb_font_data = {}

local function get_tsb_table (filename, subfont)
  subfont = tonumber(subfont) or 1
  local key = stringformat("%s::%s", filename, subfont)
  if tsb_font_data[key] then
    return tsb_font_data[key]
  end
  local f = openfile(filename, true) -- true: zero-based
  if f then
    local vmtx
    local tables = get_otf_tables(f, subfont)
    if tables then
      local vhea = read_vhea(f, tables.vhea)
      local numofheights = vhea and vhea.numheights
      local maxp = read_maxp(f, tables.maxp)
      local numofglyphs = maxp and maxp.numglyphs
      vmtx = read_vmtx(f, tables.vmtx, numofheights, numofglyphs)
    end
    closefile(f)
    tsb_font_data[key] = vmtx
    return vmtx
  end
end

local function fontdata_warning(activename, ...)
  if not active_processes[activename] then
    warning(...)
    active_processes[activename] = true
  end
end

local function process_vertical_font (fontdata)
  local subfont = fontdata.specification and fontdata.specification.sub
  local tsb_tab = get_tsb_table(fontdata.filename, subfont)

  if not tsb_tab then
    local fullname = fontdata.fullname
    fontdata_warning("vertical."..fullname,
    "Vertical metrics table (vmtx) not found in the font\n`%s'", fullname)
    return
  end

  local shared       = fontdata.shared or {}
  local descriptions = shared.rawdata and shared.rawdata.descriptions or {}
  local parameters   = fontdata.parameters or {}
  local scale    = parameters.factor or 655.36
  local quad     = parameters.quad or 655360
  local ascender = parameters.ascender or quad*0.8

  local goffset = font_opt_dim(fontdata, "charraise") or
                  (parameters.x_height or quad/2)/2
  -- declare shift amount of horizontal box inside vertical env.
  fontdata.horizboxmoveleftamount = quad/2-goffset

  for i,v in pairs(fontdata.characters) do
    local voff = goffset - (v.width or 0)/2
    local bbox = descriptions[i] and descriptions[i].boundingbox or {0,0,0,0}
    local gid  = v.index
    local tsb  = tsb_tab[gid].tsb
    local hoff = tsb and (bbox[4] + tsb) * scale or ascender
    v.commands = {
      { "down", -voff },
      { "right", hoff },
      { "pdf", "q 0 1 -1 0 0 0 cm" },
      { "push" },
      { "char", i },
      { "pop" },
      { "pdf", "Q" },
    }
    local vw = tsb_tab[gid].ht
    v.width  = vw and vw * scale or quad
    local ht = bbox[3] * scale + voff
    local dp = bbox[1] * scale + voff
    v.height = ht > 0 and  ht or nil
    v.depth  = dp < 0 and -dp or nil
  end
  local spacechar = char_in_font(fontdata, 32)
  if spacechar then
    parameters.space         = spacechar.width
    parameters.space_stretch = spacechar.width/2
    parameters.space_shrink  = spacechar.width/2
  end

  local res = fontdata.resources or {}
  local fea = shared.features or {}
  fea.kern = nil  -- only for horizontal writing
  fea.vert = true -- should be activated by default
  local seq = res.sequences or {}
  for _,v in ipairs(seq) do
    local fea = v.features or {}
    if fea.vhal or fea.vkrn or fea.valt or fea.vpal or fea.vert then
      if v.type == "gpos_single" then
        for _,vv in pairs(v.steps or {}) do
          for _,vvv in pairs(vv.coverage or {}) do
            if type(vvv) == "table" and #vvv == 4 then
              vvv[1], vvv[2], vvv[3], vvv[4], vvv[5] =
              -vvv[2], vvv[1], vvv[4], vvv[3], 0 -- last 0 to avoid multiple run
            end
          end
        end
      elseif v.type == "gpos_pair" then
        for _,vv in pairs(v.steps or {}) do
          for _,vvv in pairs(vv.coverage or {}) do
            for _,vvvv in pairs(vvv) do
              for _,vvvvv in pairs(vvvv) do
                if type(vvvvv) == "table" and #vvvvv == 4 then
                  vvvvv[1], vvvvv[2], vvvvv[3], vvvvv[4], vvvvv[5] =
                  -vvvvv[2], vvvvv[1], vvvvv[4], vvvvv[3], 0
                end
              end
            end
          end
        end
      end
    end
  end
end

function luatexko.gethorizboxmoveleft ()
  for _, v in ipairs{ fontcurrent(),
                      texattribute.luatexkohangulfontattr,
                      texattribute.luatexkohanjafontattr,
                      texattribute.luatexkofallbackfontattr } do
    if v and v > 0 then
      local amount = get_font_data(v).horizboxmoveleftamount
      if amount then
        set_macro("luatexkohorizboxmoveleft", texsp(amount).."sp")
        break
      end
    end
  end
end

-- charraise

local function process_charraise (head)
  local curr = head
  while curr do
    if curr.id == glyphid then
      local f = curr.font
      local raise = font_options.charraise[f]
      if raise and not option_in_font(f, "vertical") then
        local props = my_node_props(curr)
        if not props.charraised then
          curr.yoffset = (curr.yoffset or 0) + raise
          props.charraised = true
        end
      end
    end
    curr = getnext(curr)
  end
  return head
end

-- fake italic correctioin

local function process_fake_slant_corr (head) -- for font fallback
  local curr = head
  while curr do
    local id = curr.id
    if id == kernid then
      if curr.subtype == italcorr and curr.kern == 0 then
        local p, t = getprev(curr), {}
        while p do
          if p.id == glyphid then
            -- harf font: break before reordered tone mark
            if harf_reordered_tonemark(p) then
              break
            end

            local slant = option_in_font(p.font, "slant")
            if slant and slant > 0 then
              tableinsert(t, char_in_font(p.font, p.char).italic or 0)
            end

            local c = my_node_props(p).unicode or p.char
            if is_jungsong(c) or is_jongsong(c) or hangul_tonemark[c] then
            else
              break
            end
          else
            break
          end
          p = getprev(p)
        end

        if p.id == glyphid and #t > 0 then
          local italic = mathmax(tableunpack(t))
          if italic > 0 then
            curr.kern = italic
          end
        end
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  return head
end

local function process_fake_slant_font (fontdata)
  local fsl = fontdata.slant
  if fsl and fsl > 0 then
    fsl = fsl/1000
    local hb = is_harf(fontdata)

    local params = fontdata.parameters or {}
    if not hb then -- hb done by luaotfload
      params.slant = (params.slant or 0) + fsl*65536 -- slant per point
    end

    local scale  = hb and hb.scale or params.factor or 655.36

    local shared = fontdata.shared or {}
    local descrs = shared.rawdata and shared.rawdata.descriptions or {}

    for i, v in pairs(fontdata.characters) do
      local ht   = v.height and v.height > 0 and v.height or 0
      local wd   = v.width  and v.width  > 0 and v.width  or 0
      local rbearing = 0

      if wd > 0 then -- or, jong/jung italic could by very large value
        if hb then
          local extents = hb.shared.font:get_glyph_extents(v.index)
          if extents then
            rbearing = wd - (extents.x_bearing + extents.width)*scale
          end
        else
          local bbox = descrs[i] and descrs[i].boundingbox
          if bbox then
            rbearing = wd - bbox[3]*scale
          end
        end
      end

      local italic = ht * fsl - rbearing
      if italic > 0 then
        v.italic = italic
      end
    end
  end
end

-- wrap up

local pass_fun = function(...) return ... end
create_callback("luatexko_hpack_first",         "data", pass_fun)
create_callback("luatexko_prelinebreak_first",  "data", pass_fun)
create_callback("luatexko_hpack_second",        "data", pass_fun)
create_callback("luatexko_prelinebreak_second", "data", pass_fun)
create_callback("luatexko_do_atbegshi",         "data", pass_fun)

function luatexko.process_atbegshi (box)
  if box and box.list then
    box.list = call_callback("luatexko_do_atbegshi", box.list)
  end
end

add_to_callback("hpack_filter", function(h)
  h = process_fonts(h)
  h = call_callback("luatexko_hpack_first", h)
  h = call_callback("luatexko_hpack_second", h)
  return process_linebreak(h)
end, "luatexko.hpack_filter.pre_rendering", 1)

add_to_callback("pre_linebreak_filter", function(h)
  h = process_fonts(h)
  h = call_callback("luatexko_prelinebreak_first", h, true)
  h = call_callback("luatexko_prelinebreak_second", h, true)
  return process_linebreak(h, true)
end, "luatexko.pre_linebreak_filter.pre_rendering", 1)

local font_opt_procs = {
  removeclassicspaces = {
    luatexko_hpack_first        = process_remove_spaces,
    luatexko_prelinebreak_first = process_remove_spaces,
  },
  interhangul = {
    luatexko_hpack_second        = process_interhangul,
    luatexko_prelinebreak_second = process_interhangul,
  },
  interlatincjk = {
    luatexko_hpack_second        = process_interlatincjk,
    luatexko_prelinebreak_second = process_interlatincjk,
  },
  charraise = {
    hpack_filter         = process_charraise,
    pre_linebreak_filter = process_charraise,
  },
  compresspunctuations = {
    hpack_filter         = process_glyph_width,
    pre_linebreak_filter = process_glyph_width,
  },
  slant = {
    hpack_filter         = process_fake_slant_corr,
    pre_linebreak_filter = process_fake_slant_corr,
  },
}

local font_opt_procs_single = {
  expansion = function(fontdata)
    if is_harf(fontdata) then -- for now, no support in harf mode
      local val   = option_in_font(fontdata, "expansion")
      local setup = fonts.expansions.setups[val] or {}
      fontdata.stretch = fontdata.stretch or (setup.stretch or 2)*10
      fontdata.shrink  = fontdata.shrink  or (setup.shrink  or 2)*10
      fontdata.step    = fontdata.step    or (setup.step    or .5)*10
    end
    if tex.adjustspacing == 0 then
      texset("global", "adjustspacing", 2)
    end
  end,

  protrusion = function(fontdata)
    if is_harf(fontdata) then -- for now, no support in harf mode
      local val   = option_in_font(fontdata, "protrusion")
      local setup = fonts.protrusions.setups[val] or {}
      local quad  = fontdata.parameters.quad
      for i, v in pairs(setup) do
        local chr = fontdata.characters[i]
        if chr then
          local wdq = chr.width/quad
          chr.left_protruding  = chr.left_protruding  or wdq*v[1]*1000
          chr.right_protruding = chr.right_protruding or wdq*v[2]*1000
        end
      end
    end
    if tex.protrudechars == 0 then
      texset("global", "protrudechars", 2)
    end
    if option_in_font(fontdata, "compresspunctuations") then
      local fullname = fontdata.fullname
      fontdata_warning("protrude."..fullname,
      "Both `compresspunctuations' and `protrusion' are\nenabled for `%s'.\n"..
      "Beware bad justifications.", fullname)
    end
  end,

  slant = process_fake_slant_font,

  vertical = function(fontdata)
    local fullname = fontdata.fullname
    if is_harf(fontdata) then
      fontdata_warning("vertical."..fullname,
      "Currently, vertical writing is not supported\nby harf mode."..
      "`Renderer=Node' option is needed for\n`%s'", fullname)
    elseif fontdata.type == "virtual" then
      fontdata_warning("vitrual."..fullname,
      "Virtual font `%s' cannot be\nused for vertical writing.", fullname)
    else
      process_vertical_font(fontdata)
    end
  end,
}

local function process_patch_font (fontdata)
  if type(fontdata) ~= "table" or
     fontdata.format ~= "opentype" and fontdata.format ~= "truetype" then
    return
  end -- as we have called patch_font_unsafe for hb fonts

  for name, procs in pairs( font_opt_procs ) do
    if not active_processes[name] and option_in_font(fontdata, name) then
      if name == "charraise" and option_in_font(fontdata, "vertical") then
      else
        for cbnam, cbfun in pairs( procs ) do
          add_to_callback(cbnam, cbfun, "luatexko."..cbnam.."."..name)
        end
        active_processes[name] = true
      end
    end
  end

  for name, func in pairs( font_opt_procs_single ) do
    if option_in_font(fontdata, name) then
      func(fontdata)
    end
  end
end

add_to_callback("luaotfload.patch_font", process_patch_font,
"luatexko.patch_font")
add_to_callback("luaotfload.patch_font_unsafe", process_patch_font,
"luatexko.patch_font")

local auxiliary_procs = {
  dotemph = {
    luatexko_do_atbegshi = process_dotemph,
  },
  uline   = {
    luatexko_do_atbegshi = process_uline,
  },
  ruby    = {
    pre_linebreak_filter = process_ruby_pre_linebreak,
    luatexko_do_atbegshi = process_ruby_post_linebreak,
  },
  autojosa = {
    luatexko_hpack_first        = process_josa,
    luatexko_prelinebreak_first = process_josa,
  },
  reorderTM = {
    luatexko_hpack_first        = process_reorder_tonemarks,
    luatexko_prelinebreak_first = process_reorder_tonemarks,
  },
}

function luatexko.activate (name)
  for cbnam, cbfun in pairs( auxiliary_procs[name] ) do
    add_to_callback(cbnam, cbfun, "luatexko."..cbnam.."."..name)
  end
  active_processes[name] = true
end

add_to_callback ("hyphenate",
function(head)
  local curr = head
  while curr do
    local id = curr.id
    if id == glyphid and curr.subtype == 1 and curr.lang ~= nohyphen then
      local c = curr.char
      if c then
        if is_unicode_var_sel(c) then
          local p = getprev(curr)
          if p.id == glyphid then
            curr.lang = p.lang
          end
        elseif is_cjk_char(c) then
          curr.lang = langkor
        end
      end
    elseif id == mathid then
      curr = end_of_math(curr)
    end
    curr = getnext(curr)
  end
  lang.hyphenate(head)
end,
"luatexko.hyphenate.prevent_disc_nodes")

-- aux functions

function luatexko.deactivateall (str)
  luatexko.deactivated = {}
  for _, name in ipairs{ "hpack_filter",
                         "pre_linebreak_filter",
                         "hyphenate",
                         "luatexko_do_atbegshi", -- might not work properly
                         "luaotfload.patch_font_unsafe", -- added for harf
                         "luaotfload.patch_font" } do
    local t = {}
    for i, v in ipairs( callback_descriptions(name) ) do
      if v:find(str or "^luatexko%.") then
        local ff, dd = remove_from_callback(name, v)
        tableinsert(t, { ff, dd, i })
      end
    end
    luatexko.deactivated[name] = t
  end
end

function luatexko.reactivateall ()
  for name, v in pairs(luatexko.deactivated or {}) do
    for _, vv in ipairs(v) do
      add_to_callback(name, tableunpack(vv))
    end
  end
  luatexko.deactivated = nil
end

function luatexko.currenthashangulchars (cnt)
  texcount[cnt] = char_in_font(fontcurrent(), 0xAC00) and 1 or 0
end