summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/luatex/luatexja/ltj-direction.lua
blob: 565190be2d3595f166d6b4a4c75fb17cfb7452b5 (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
--
-- src/ltj-direction.lua
--

luatexja.load_module 'base';      local ltjb = luatexja.base
luatexja.load_module 'stack';     local ltjs = luatexja.stack
luatexja.direction = {}

local attr_dir = luatexbase.attributes['ltj@dir']
local attr_icflag = luatexbase.attributes['ltj@icflag']

local cat_lp = luatexbase.catcodetables['latex-package']
local to_node = node.direct.tonode
local to_direct = node.direct.todirect
local has_attr = node.direct.has_attribute
local set_attr = node.direct.set_attribute
local insert_before = node.direct.insert_before
local insert_after = node.direct.insert_after
local getid = node.direct.getid
local getsubtype = node.direct.getsubtype
local getlist = node.direct.getlist
local setfield = node.direct.setfield
local getfield = node.direct.getfield
local node_new = node.direct.new
local node_tail = node.direct.tail
local node_free = node.direct.free
local node_remove = node.direct.remove
local node_next = node.direct.getnext
local traverse = node.direct.traverse
local traverse_id = node.direct.traverse_id
local start_time_measure, stop_time_measure
    = ltjb.start_time_measure, ltjb.stop_time_measure
local abs = math.abs

local id_kern    = node.id 'kern'
local id_hlist   = node.id 'hlist'
local id_vlist   = node.id 'vlist'
local id_whatsit = node.id 'whatsit'
local sid_save   = node.subtype 'pdf_save'
local sid_restore= node.subtype 'pdf_restore'
local sid_matrix = node.subtype 'pdf_setmatrix'
local sid_user   = node.subtype 'user_defined'

local tex_nest = tex.nest
local tex_getcount = tex.getcount
local ensure_tex_attr = ltjb.ensure_tex_attr
local PROCESSED    = luatexja.icflag_table.PROCESSED
local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
local PACKED       = luatexja.icflag_table.PACKED
local DIR  = luatexja.userid_table.DIR
local dir_tate = luatexja.dir_table.dir_tate
local dir_yoko = luatexja.dir_table.dir_yoko
local dir_dtou = luatexja.dir_table.dir_dtou
local dir_utod = luatexja.dir_table.dir_utod
local dir_math_mod    = luatexja.dir_table.dir_math_mod
local dir_node_auto   = luatexja.dir_table.dir_node_auto
local dir_node_manual = luatexja.dir_table.dir_node_manual
local function get_attr_icflag(p)
   return (has_attr(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
end

local page_direction
--
local dir_pool
do
   local node_copy = node.direct.copy
   dir_pool = {}
   for _,i in pairs({dir_tate, dir_yoko, dir_dtou, dir_utod}) do
      local w = node_new(id_whatsit, sid_user)
      set_attr(w, attr_dir, i)
      setfield(w, 'user_id', DIR)
      setfield(w, 'type', 110)
      setfield(w, 'next', nil)
      dir_pool[i] = function () return node_copy(w) end
   end
end

--
local function adjust_badness(hd)
   if not node_next(hd) and getid(hd)==id_whatsit and getsubtype(hd)==sid_user
   and getfield(hd, 'user_id')==DIR then
      -- avoid double whatsit
      luatexja.global_temp=tex.globaldefs; tex.globaldefs=0
      luatexja.hbadness_temp=tex.hbadness; tex.hbadness=10000
      luatexja.vbadness_temp=tex.vbadness; tex.vbadness=10000
   else
      luatexja.global_temp = nil
      luatexja.hbadness_temp=nil
      luatexja.vbadness_temp=nil
   end
end

local get_dir_count, get_adjust_dir_count
do
   local node_attr = node.has_attribute
   local function get_dir_count_inner(h)
      if h then
         if h.id==id_whatsit and h.subtype==sid_user and h.user_id==DIR then
            return ((node_attr(h, attr_icflag) or 0)<PROCESSED_BEGIN_FLAG)
               and (node_attr(h,attr_dir)%dir_node_auto) or 0
         else
            return 0
         end
      else
         return 0
      end
   end
   function get_dir_count()
       for i=tex_nest.ptr, 1, -1 do
           local h = tex_nest[i].head.next
           if h then
               local t = get_dir_count_inner(h)
               if t~=0 then return t end
           end
       end
       return page_direction
   end
   function get_adjust_dir_count()
      for i=tex_nest.ptr, 1, -1 do
         local v = tex_nest[i]
         local h, m = v.head.next, v.mode
         if abs(m)== ltjs.vmode and h then
            local t = get_dir_count_inner(h)
            if t~=0 then return t end
         end
      end
      return page_direction
   end
   luatexja.direction.get_dir_count = get_dir_count
   luatexja.direction.get_adjust_dir_count = get_adjust_dir_count
end


-- \tate, \yoko,\dtou, \utod
do
   local node_next = node.next
   local node_set_attr = node.set_attribute
   local node_traverse = node.traverse
   local STCK = luatexja.userid_table.STCK
   local IHB = luatexja.userid_table.IHB
   local id_local = node.id 'local_par'
   local id_dir   = node.id 'dir'

   local function test_list(h, lv)
      if not h then
         return 2 -- need to create dir_whatsit
      else
         local flag = 2 -- need to create dir_whatsit
         local w
         for p in node_traverse(h) do
            if p.id==id_whatsit then
               if p.subtype==sid_user then
                  local uid= p.user_id
                  if uid==DIR then
                     flag = 1; w = w or p -- found
                  elseif not(uid==IHB or uid==STCK) then
                     return 0 -- error
                  end
               end
            elseif p.id~=id_local and p.id~=id_dir then
               return 0 -- error
            end
         end
         if flag==1 then -- dir_whatsit already exists
            return 1, w
         else
            return flag
         end
      end
   end
   local node_next_node, node_tail_node = node.next, node.tail
   local insert_after_node = node.insert_after
   function luatexja.direction.set_list_direction_hook(v)
      local lv = tex_nest.ptr -- must be >= 1
      if not v then
         v = get_dir_count()
         if abs(tex_nest[lv-1].mode) == ltjs.mmode and v == dir_tate then
            v = dir_utod
         end
      elseif v=='adj' then
         v = get_adjust_dir_count()
      end
      local h = tex_nest[lv].head
      local hn = node.next(h)
      hn = (hn and hn.id==id_local) and hn or h
      local w = to_node(dir_pool[v]())
      insert_after_node(h, hn, w)
      tex_nest[lv].tail = node_tail_node(w)
      ensure_tex_attr(attr_icflag, 0)
      ensure_tex_attr(attr_dir, 0)
   end

   local function set_list_direction(v, name)
      local lv = tex_nest.ptr
      if not v then
         v,name  = get_dir_count(), nil
         if lv>=1 and abs(tex_nest[lv-1].mode) == ltjs.mmode and v == dir_tate then
            v = dir_utod
         end
      elseif v=='adj' then
         v,name = get_adjust_dir_count(), nil
      end
      local current_nest = tex_nest[lv]
      if tex.currentgrouptype==6 then
         ltjb.package_error(
                 'luatexja',
                 "You can't use `\\" .. name .. "' in an align",
                 "To change the direction in an align, \n"
                 .. "you shold use \\hbox or \\vbox.")
      elseif current_nest.mode == ltjs.hmode or abs(current_nest.mode) == ltjs.mmode then
         ltjb.package_error(
                 'luatexja',
                 "Improper `\\" .. name .. "'",
                 'You cannot change the direction in unrestricted horizontal mode \n'
                 .. 'nor math modes.')
      else
         local h = (lv==0) and tex.lists.page_head or current_nest.head.next
         local flag,w = test_list(h,lv)
         if flag==0 then
            if lv==0 and not page_direction then
               page_direction = v -- for first call of \yoko (in luatexja-core.sty)
            else
              if luatexja.debug then
                luatexja.ext_show_node_list(node.direct.tonode(h),'>> ', texio.write_nl)
              end
              ltjb.package_error(
                 'luatexja',
                 "Use `\\" .. tostring(name) .. "' at top of list",
                 'Direction change command by LuaTeX-ja is available\n'
                    .. 'only when the current list is null.')
            end
         elseif flag==1 then
            node_set_attr(w, attr_dir, v)
            if lv==0 then page_direction = v end
         elseif lv==0 then
            page_direction = v
         else -- flag == 2: need to create dir whatsit.
            local h = current_nest.head
            local hn = node.next(h)
            hn = (hn and hn.id==id_local) and hn or h
            local w = to_node(dir_pool[v]())
            insert_after_node(h,hn,w)
            current_nest.tail = node_tail_node(w)
         end
         ensure_tex_attr(attr_icflag, 0)
      end
      ensure_tex_attr(attr_dir, 0)
   end
   luatexja.direction.set_list_direction = set_list_direction
end

-- ボックスに dir whatsit を追加
local function create_dir_whatsit(hd, gc, new_dir)
   if getid(hd)==id_whatsit and
            getsubtype(hd)==sid_user and getfield(hd, 'user_id')==DIR then
      set_attr(hd, attr_icflag,
               get_attr_icflag(hd) + PROCESSED_BEGIN_FLAG)
      local n =node_next(hd)
      if n then
         set_attr(n, attr_icflag,
                  get_attr_icflag(n) + PROCESSED_BEGIN_FLAG)
      end
      ensure_tex_attr(attr_icflag, 0)
      return hd
   else
      local w = dir_pool[new_dir]()
      set_attr(w, attr_icflag, PROCESSED_BEGIN_FLAG)
      set_attr(hd, attr_icflag,
               get_attr_icflag(hd) + PROCESSED_BEGIN_FLAG)
      ensure_tex_attr(attr_icflag, 0)
      ensure_tex_attr(attr_dir, 0)
      return insert_before(hd, hd, w)
   end
end

-- hpack_filter, vpack_filter, post_line_break_filter
-- の結果を組方向を明示するため,先頭に dir_node を設置
local get_box_dir
do
   local function create_dir_whatsit_hpack(h, gc)
      local hd = to_direct(h)
      if gc=='fin_row' then
         if hd  then
            for p in traverse_id(15, hd) do -- unset
               if get_box_dir(p, 0)==0 then
                  setfield(p, 'head', create_dir_whatsit(getlist(p), 'fin_row', ltjs.list_dir))
               end
            end
            set_attr(hd, attr_icflag, PROCESSED_BEGIN_FLAG)
            ensure_tex_attr(attr_icflag, 0)
         end
         return h
      elseif gc == 'preamble'  then
      else
         adjust_badness(hd)
         return to_node(create_dir_whatsit(hd, gc, ltjs.list_dir))
      end
   end

   ltjb.add_to_callback('hpack_filter',
                              create_dir_whatsit_hpack, 'ltj.create_dir_whatsit', 10000)
end

do
   local function create_dir_whatsit_parbox(h, gc)
      stop_time_measure 'tex_linebreak';
      -- start 側は ltj-debug.lua に
      local new_dir = ltjs.list_dir
      for line in traverse_id(id_hlist, to_direct(h)) do
         setfield(line, 'head', create_dir_whatsit(getlist(line), gc, new_dir) )
      end
      ensure_tex_attr(attr_dir, 0)
      return h
   end
   ltjb.add_to_callback('post_linebreak_filter',
                              create_dir_whatsit_parbox, 'ltj.create_dir_whatsit', 10000)
end

local create_dir_whatsit_vbox
do
   local wh = {}
   local id_glue = node.id 'glue'
   create_dir_whatsit_vbox = function (hd, gc)
      ltjs.list_dir = get_dir_count()
      -- remove dir whatsit
      for x in traverse_id(id_whatsit, hd) do
         if getsubtype(x)==sid_user and getfield(x, 'user_id')==DIR then
            wh[#wh+1]=x
         end
      end
      if hd==wh[1] then
         ltjs.list_dir = has_attr(hd, attr_dir)
         local x = node_next(hd)
         while x and getid(x)==id_glue and getsubtype(x)==3 do
            node_remove(hd,x); node_free(x); x = node_next(hd)
         end
         if #wh==1 then wh[1]=nil else wh[#wh], wh[1]=nil, wh[#wh] end
      end
      for i=1,#wh do
         hd = node_remove(hd, wh[i]); node_free(wh[i]); wh[i] = nil
      end
      if gc=='fin_row' then -- gc == 'preamble' case is treated in dir_adjust_vpack
         if hd then
            set_attr(hd, attr_icflag, PROCESSED_BEGIN_FLAG)
            ensure_tex_attr(attr_icflag, 0)
         end
         return hd
      elseif gc=='vtop' then
         local n = node_next(hd)
         local w = create_dir_whatsit(hd, gc, ltjs.list_dir)
         -- move dir whatsit after hd
         setfield(hd, 'next', w); setfield(w, 'next', n); 
         return hd
      else return create_dir_whatsit(hd, gc, ltjs.list_dir)
      end
   end
end

-- dir_node に包む方法を書いたテーブル
local dir_node_aux
do
   local floor = math.floor
   local get_h =function (w,h,d) return h end
   local get_d =function (w,h,d) return d end
   local get_h_d =function (w,h,d) return h+d end
   local get_h_d_neg =function (w,h,d) return -h-d end
   local get_d_neg =function (w,h,d) return -d end
   local get_w_half =function (w,h,d) return floor(0.5*w) end
   local get_w_half_rem =function (w,h,d) return w-floor(0.5*w) end
   local get_w_neg =function (w,h,d) return -w end
   local get_w =function (w,h,d) return w end
   local zero = function() return 0 end
   dir_node_aux = {
      [dir_yoko] = { -- yoko を
         [dir_tate] = { -- tate 中で組む
            width  = get_h_d,
            height = get_w_half,
            depth  = get_w_half_rem,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 1 -1 0' },
               { 'kern', function(w,h,d,nw,nh,nd) return -nd end },
               { 'box' , get_h},
               { 'kern', function(w,h,d,nw,nh,nd) return nd-w end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 1 -1 0' },
               { 'kern' , zero },
               { 'box' , function(w,h,d,nw,nh,nd) return -nh-nd end },
               { 'kern', get_h_d_neg},
               { 'whatsit', sid_restore },
            },
         },
         [dir_dtou] = { -- dtou 中で組む
            width  = get_h_d,
            height = get_w,
            depth  = zero,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 -1 1 0' },
               { 'kern', function(w,h,d,nw,nh,nd) return -nh end },
               { 'box', get_d_neg },
               { 'kern', function(w,h,d,nw,nh,nd) return nh-w end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 -1 1 0' },
               { 'kern', get_h_d_neg },
               { 'box', zero },
               { 'whatsit', sid_restore },
            },
         },
      },
      [dir_tate] = { -- tate を
         [dir_yoko] = { -- yoko 中で組む
            width  = get_h_d,
            height = get_w,
            depth  = zero,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 -1 1 0' },
               { 'kern', function (w,h,d,nw,nh,nd) return -nh end },
               { 'box' , get_d_neg },
               { 'kern', function (w,h,d,nw,nh,nd) return nh-w end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 -1 1 0' },
               { 'kern', get_h_d_neg },
               { 'box', zero },
               { 'whatsit', sid_restore },
            },
         },
         [dir_dtou] = { -- dtou 中で組む
            width  = get_w,
            height = get_d,
            depth  = get_h,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '-1 0 0 -1' },
               { 'kern', get_w_neg },
               { 'box',  function (w,h,d,nw,nh,nd) return h-nd end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '-1 0 0 -1' },
               { 'kern', get_h_d_neg },
               { 'box', get_w_neg },
               { 'whatsit', sid_restore },
            },
         },
      },
      [dir_dtou] = { -- dtou を
         [dir_yoko] = { -- yoko 中で組む
            width  = get_h_d,
            height = get_w,
            depth  = zero,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '0 1 -1 0' },
               { 'kern', function (w,h,d,nw,nh,nd) return -nd end },
               { 'box', get_h },
               { 'kern', function (w,h,d,nw,nh,nd) return nd-w end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'kern', zero },
               { 'whatsit', sid_save },
               { 'rotate', '0 1 -1 0' },
               { 'box', function (w,h,d,nw,nh,nd) return -nd-nh end },
               { 'kern', get_h_d_neg },
               { 'whatsit', sid_restore },
            },
         },
         [dir_tate] = { -- tate 中で組む
            width  = get_w,
            height = get_d,
            depth  = get_h,
            [id_hlist] = {
               { 'whatsit', sid_save },
               { 'rotate', '-1 0 0 -1' },
               { 'kern', get_w_neg },
               { 'box', function (w,h,d,nw,nh,nd) return h-nd end },
               { 'whatsit', sid_restore },
            },
            [id_vlist] = {
               { 'whatsit', sid_save },
               { 'rotate', ' -1 0 0 -1' },
               { 'kern', function (w,h,d,nw,nh,nd) return -nh-nd end },
               { 'box', get_w_neg },
               { 'kern', function (w,h,d,nw,nh,nd) return nh+nd-h-d end },
               { 'whatsit', sid_restore },
            },
         },
      },
   }
end

-- 1st ret val: b の組方向
-- 2nd ret val はその DIR whatsit
function get_box_dir(b, default)
   start_time_measure 'get_box_dir'
   local dir = has_attr(b, attr_dir) or 0
   local bh = getfield(b,'head')
   -- b は insert node となりうるので getlist() は使えない
   local c
   if bh~=0 then -- bh != nil
      for bh in traverse_id(id_whatsit, bh) do
         if getsubtype(bh)==sid_user and getfield(bh, 'user_id')==DIR then
            c = bh; dir = (dir==0) and has_attr(bh, attr_dir) or dir
         end
      end
   end
   stop_time_measure 'get_box_dir'
   return (dir==0 and default or dir), c
end

do
   local getbox = tex.getbox
   local dir_backup
   function luatexja.direction.unbox_check_dir(is_copy)
      start_time_measure 'box_primitive_hook'
      local list_dir = get_dir_count()%dir_math_mod
      local b = getbox(tex_getcount 'ltj@tempcnta')
      if b and getlist(to_direct(b)) then
         local box_dir = get_box_dir(to_direct(b), dir_yoko)
         if box_dir%dir_math_mod ~= list_dir then
            ltjb.package_error(
               'luatexja',
               "Incompatible direction list can't be unboxed",
               'I refuse to unbox a box in differrent direction.')
            tex.sprint(cat_lp, '\\@gobbletwo')
         else
            dir_backup = nil
            local bd = to_direct(b)
            local hd = getlist(bd)
            local nh = hd
            while hd do
               if getid(hd)==id_whatsit and getsubtype(hd)==sid_user
                  and getfield(hd, 'user_id')==DIR then
                     local d = hd
                     nh, hd = node_remove(nh, hd)
                     if is_copy==true and (not dir_backup) then
                        dir_backup = d; setfield(dir_backup, 'next', nil)
                     else
                        node_free(d)
                     end
               else
                  hd = node_next(hd)
               end
            end
            setfield(bd, 'head', nh)
         end
      end
      if luatexja.global_temp and tex.globaldefs~=luatexja.global_temp then
         tex.globaldefs = luatexja.global_temp
      end
      stop_time_measure 'box_primitive_hook'
   end
   function luatexja.direction.uncopy_restore_whatsit()
      local b = getbox(tex_getcount 'ltj@tempcnta')
      if b then
         local bd = to_direct(b)
         if dir_backup then
            setfield(dir_backup, 'next', getlist(bd))
            setfield(bd, 'head', dir_backup)
            dir_backup = nil
         end
      end
   end
end

-- dir_node に包まれている「本来の中身」を取り出し,
-- dir_node を全部消去
local function unwrap_dir_node(b, head, box_dir)
   -- b: dir_node, head: the head of list, box_dir:
   -- return values are (new head), (next of b), (contents), (dir of contents)
   local bh = getlist(b)
   local nh, nb
   if head then
      nh = insert_before(head, b, bh)
      nh, nb = node_remove(nh, b)
      setfield(b, 'next', nil)
      node_free(b)
   end
   local shift_old, b_dir, wh = nil, get_box_dir(bh, 0)
   if wh then
      node.direct.flush_list(getfield(wh, 'value'))
      setfield(wh, 'value', nil)
   end
   return nh, nb, bh, b_dir
end

-- is_manual: 寸法変更に伴うものか?
local function create_dir_node(b, b_dir, new_dir, is_manual)
   local info = dir_node_aux[b_dir%dir_math_mod][new_dir%dir_math_mod]
   local w = getfield(b, 'width')
   local h = getfield(b, 'height')
   local d = getfield(b, 'depth')
   local db = node_new(getid(b)) -- dir_node
   set_attr(db, attr_dir,
            new_dir + (is_manual and dir_node_manual or dir_node_auto))
   set_attr(db, attr_icflag, PROCESSED)
   set_attr(b, attr_icflag, PROCESSED)
   ensure_tex_attr(attr_dir, 0)
   ensure_tex_attr(attr_icflag, 0)
   setfield(db, 'dir', getfield(b, 'dir'))
   setfield(db, 'shift', 0)
   setfield(db, 'width',  info.width(w,h,d))
   setfield(db, 'height', info.height(w,h,d))
   setfield(db, 'depth',  info.depth(w,h,d))
   return db
end

-- 異方向のボックスの処理
local make_dir_whatsit, process_dir_node
do
   make_dir_whatsit = function (head, b, new_dir, origin)
      new_dir = new_dir%dir_math_mod
      -- head: list head, b: box
      -- origin: コール元 (for debug)
      -- return value: (new head), (next of b), (new b), (is_b_dir_node)
      -- (new b): b か dir_node に被せられた b
      local bh = getlist(b)
      local box_dir, dn =  get_box_dir(b, ltjs.list_dir)
      -- 既に b の中身にあるwhatsit
      if (box_dir<dir_node_auto) and (not dn) then
        bh = create_dir_whatsit(bh, 'make_dir_whatsit', dir_yoko)
        dn = bh; setfield(b, 'head', bh)
      end
      if box_dir%dir_math_mod==new_dir then
         if box_dir>=dir_node_auto then
            -- dir_node としてカプセル化されている
            local _, dnc = get_box_dir(b, 0)
            if dnc then -- free all other dir_node
               node.direct.flush_list(getfield(dnc, 'value'))
               setfield(dnc, 'value', nil)
            end
            set_attr(b, attr_dir, box_dir%dir_math_mod + dir_node_auto)
            return head, node_next(b), b, true
         else
            -- 組方向が一緒 (up to math dir) のボックスなので,何もしなくて良い
            return head, node_next(b), b, false
         end
      else
         -- 組方向を合わせる必要あり
         local nh, nb, ret, flag
         if box_dir>= dir_node_auto then -- unwrap
            local b_dir
            head, nb, b, b_dir = unwrap_dir_node(b, head, box_dir)
            bh = getlist(b)
            if b_dir%dir_math_mod==new_dir then
               -- dir_node の中身が周囲の組方向とあっている
               return head, nb, b, false
            else box_dir = b_dir end
         end
         box_dir = box_dir%dir_math_mod
         local db
         local dnh = getfield(dn, 'value')
         for x in traverse(dnh) do
            if has_attr(x, attr_dir)%dir_math_mod == new_dir then
               setfield(dn, 'value', to_node(node_remove(dnh, x)))
               db=x; break
            end
         end
         node.direct.flush_list(getfield(dn, 'value'))
         setfield(dn, 'value', nil)
         db = db or create_dir_node(b, box_dir, new_dir, false)
         local w = getfield(b, 'width')
         local h = getfield(b, 'height')
         local d = getfield(b, 'depth')
         local dn_w = getfield(db, 'width')
         local dn_h = getfield(db, 'height')
         local dn_d = getfield(db, 'depth')
         nh, nb =  insert_before(head, b, db), nil
         nh, nb = node_remove(nh, b)
         setfield(b, 'next', nil); setfield(db, 'head', b)
         ret, flag = db, true
         return nh, nb, ret, flag
      end
   end
   process_dir_node = function (hd, gc)
      local x, new_dir = hd, ltjs.list_dir or dir_yoko
      while x do
         local xid = getid(x)
         if (xid==id_hlist and get_attr_icflag(x)~=PACKED)
         or xid==id_vlist then
            hd, x = make_dir_whatsit(hd, x, new_dir, 'process_dir_node:' .. gc)
         else
            x = node_next(x)
         end
      end
      return hd
   end

   -- lastbox
   local node_prev = (node.direct~=node) and node.direct.getprev or node.prev
   local id_glue = node.id 'glue'
   local function lastbox_hook()
      start_time_measure 'box_primitive_hook'
      local bn = tex_nest[tex_nest.ptr].tail
      if bn then
         local b, head = to_direct(bn), to_direct(tex_nest[tex_nest.ptr].head)
         local bid = getid(b)
         if bid==id_hlist or bid==id_vlist then
            local p = getlist(b)
            -- alignment の各行の中身が入ったボックス
            if p and getid(p)==id_glue and getsubtype(p)==12 then -- tabskip
               local np = node_next(p); local npid = getid(np)
               if npid==id_hlist or npid==id_vlist then
                  setfield(b, 'head', create_dir_whatsit(p, 'align', get_box_dir(np, 0)))
               end
            end
            local box_dir =  get_box_dir(b, 0)
            if box_dir>= dir_node_auto then -- unwrap dir_node
               local p = node_prev(b)
               local dummy1, dummy2, nb = unwrap_dir_node(b, nil, box_dir)
               setfield(p, 'next', nb);  tex_nest[tex_nest.ptr].tail = to_node(nb)
               setfield(b, 'next', nil); setfield(b, 'head', nil)
               node_free(b); b = nb
            end
            local _, wh =  get_box_dir(b, 0) -- clean dir_node attached to the box
            if wh then
               node.direct.flush_list(getfield(wh, 'value'))
               setfield(wh, 'value', nil)
            end
         end
      end
      stop_time_measure 'box_primitive_hook'
   end

   luatexja.direction.make_dir_whatsit = make_dir_whatsit
   luatexja.direction.lastbox_hook = lastbox_hook
end

-- \wd, \ht, \dp の代わり
do
   local getbox, setdimen = tex.getbox, tex.setdimen
   local function get_box_dim_common(key, s, l_dir)
      -- s: not dir_node.
      local s_dir, wh = get_box_dir(s, dir_yoko)
      s_dir = s_dir%dir_math_mod
      if s_dir ~= l_dir then
         local not_found = true
         for x in traverse(getfield(wh, 'value')) do
            if l_dir == has_attr(x, attr_dir)%dir_node_auto then
               setdimen('ltj@tempdima', getfield(x, key))
               not_found = false; break
            end
         end
         if not_found then
            local w = getfield(s, 'width')
            local h = getfield(s, 'height')
            local d = getfield(s, 'depth')
            setdimen('ltj@tempdima',
                         dir_node_aux[s_dir][l_dir][key](w,h,d))
         end
      else
         setdimen('ltj@tempdima', getfield(s, key))
      end
   end
   local function get_box_dim(key, n)
      local gt = tex.globaldefs; tex.globaldefs = 0
      local s = getbox(n)
      if s then
         local l_dir = (get_dir_count())%dir_math_mod
         s = to_direct(s)
         local b_dir = get_box_dir(s,dir_yoko)
         if b_dir<dir_node_auto then
            get_box_dim_common(key, s, l_dir)
         elseif b_dir%dir_math_mod==l_dir then
            setdimen('ltj@tempdima', getfield(s, key))
         else
            get_box_dim_common(key, getlist(s), l_dir)
         end
      else
         setdimen('ltj@tempdima', 0)
      end
      tex.sprint(cat_lp, '\\ltj@tempdima')
      tex.globaldefs = gt
   end
   luatexja.direction.get_box_dim = get_box_dim

   -- return value: (changed dimen of box itself?)
   local scan_dimen, scan_int = token.scan_dimen, token.scan_int
   local scan_keyword = token.scan_keyword
   local function set_box_dim_common(key, s, l_dir)
      local s_dir, wh = get_box_dir(s, dir_yoko)
      s_dir = s_dir%dir_math_mod
      if s_dir ~= l_dir then
         if not wh then
            wh = create_dir_whatsit(getlist(s), 'set_box_dim', s_dir)
            setfield(s, 'head', wh)
         end
         local db
         local dnh = getfield(wh, 'value')
         for x in traverse(dnh) do
            if has_attr(x, attr_dir)%dir_node_auto==l_dir then
               db = x; break
            end
         end
         if not db then
            db = create_dir_node(s, s_dir, l_dir, true)
            setfield(db, 'next', dnh)
            setfield(wh, 'value',to_node(db))
         end
         setfield(db, key, scan_dimen())
         return false
      else
         setfield(s, key, scan_dimen())
         if wh then
            -- change dimension of dir_nodes which are created "automatically"
               local bw, bh, bd
                  = getfield(s,'width'), getfield(s, 'height'), getfield(s, 'depth')
            for x in traverse(getfield(wh, 'value')) do
               local x_dir = has_attr(x, attr_dir)
               if x_dir<dir_node_manual then
                  local info = dir_node_aux[s_dir][x_dir%dir_node_auto]
                  setfield(x, 'width',  info.width(bw,bh,bd))
                  setfield(x, 'height', info.height(bw,bh,bd))
                  setfield(x, 'depth',  info.depth(bw,bh,bd))
               end
            end
         end
         return true
      end
   end
   local function set_box_dim(key)
      local s = getbox(scan_int()); scan_keyword('=')
      if s then
         local l_dir = (get_dir_count())%dir_math_mod
         s = to_direct(s)
         local b_dir = get_box_dir(s,dir_yoko)
         if b_dir<dir_node_auto then
            set_box_dim_common(key, s, l_dir)
         elseif b_dir%dir_math_mod == l_dir then
            -- s is dir_node
            setfield(s, key, scan_dimen())
            if b_dir<dir_node_manual then
               set_attr(s, attr_dir, b_dir%dir_node_auto + dir_node_manual)
            end
         else
            local sid, b = getid(s), getlist(s)
            local info = dir_node_aux[get_box_dir(b,dir_yoko)%dir_math_mod][b_dir%dir_node_auto]
            local bw, bh, bd
               = getfield(b,'width'), getfield(b, 'height'), getfield(b, 'depth')
            local sw, sh, sd
               = getfield(s,'width'), getfield(s, 'height'), getfield(s, 'depth')
            if set_box_dim_common(key, b, l_dir) and b_dir<dir_node_manual then
               -- re-calculate dimension of s, if s is created "automatically"
               if b_dir<dir_node_manual then
                  setfield(s, 'width',  info.width(bw,bh,bd))
                  setfield(s, 'height', info.height(bw,bh,bd))
                  setfield(s, 'depth',  info.depth(bw,bh,bd))
               end
            end
         end
      end
   end
   luatexja.direction.set_box_dim = set_box_dim
end

do
   local getbox = tex.getbox
   local function get_register_dir(n)
      local s = getbox(n)
      if s then
         s = to_direct(s)
         local b_dir = get_box_dir(s, dir_yoko)
         if b_dir<dir_node_auto then
            return b_dir
         else
            local b_dir = get_box_dir(
               node_next(node_next(node_next(getlist(s)))), dir_yoko)
            return b_dir
         end
      else
         return 0
      end
   end
   luatexja.direction.get_register_dir = get_register_dir
end

do
   local getbox, setbox, copy_list = tex.getbox, tex.setbox, node.direct.copy_list
   -- raise, lower
   function luatexja.direction.raise_box()
      start_time_measure 'box_primitive_hook'
      local list_dir = get_dir_count()
      local s = getbox 'ltj@afbox'
      if s then
         local sd = to_direct(s)
         local box_dir = get_box_dir(sd, dir_yoko)
         if box_dir%dir_math_mod ~= list_dir then
            setbox('ltj@afbox',
               to_node(copy_list(make_dir_whatsit(sd, sd, list_dir, 'box_move')))
               -- copy_list しないとリストの整合性が崩れる……?
            )
         end
      end
      stop_time_measure 'box_primitive_hook'
   end
end

-- PACKED の hbox から文字を取り出す
-- luatexja.jfmglue.check_box などで使用
do
   local function glyph_from_packed(h)
      local b = getlist(h)
      return (getid(b)==id_kern or (getid(b)==id_whatsit and getsubtype(b)==sid_save) )
         and node_next(node_next(node_next(b))) or b
   end
   luatexja.direction.glyph_from_packed = glyph_from_packed
end

-- adjust
do
   local id_adjust = node.id 'adjust'
   local scan_keyword = token.scan_keyword
   function luatexja.direction.adjust_begin()
      if scan_keyword 'pre' then tex.sprint(cat_lp, '\\ltj@@vadjust@pre')
      else tex.sprint(cat_lp, '\\ltj@@vadjust@post') end
   end
   function luatexja.direction.check_adjust_direction()
      start_time_measure 'box_primitive_hook'
      local list_dir = get_adjust_dir_count()
      local a = tex_nest[tex_nest.ptr].tail
      local ad = to_direct(a)
      if a and getid(ad)==id_adjust then
         local adj_dir = get_box_dir(ad)
         if list_dir~=adj_dir then
            ltjb.package_error(
               'luatexja',
               'Direction Incompatible',
               "\\vadjust's argument and outer vlist must have same direction.")
            node.direct.last_node()
         end
      end
      stop_time_measure 'box_primitive_hook'
   end
end

-- insert
do
   local id_ins  = node.id 'ins'
   local id_rule = node.id 'rule'
   function luatexja.direction.populate_insertion_dir_whatsit()
      start_time_measure 'box_primitive_hook'
      local list_dir = get_dir_count()
      local a = tex_nest[tex_nest.ptr].tail
      local ad = to_direct(a)
      if (not a) or getid(ad)~=id_ins then
          a = node.tail(tex.lists.page_head); ad = to_direct(a)
      end
      if a and getid(ad)==id_ins then
         local h = getfield(ad, 'head')
         if getid(h)==id_whatsit and
            getsubtype(h)==sid_user and getfield(h, 'user_id')==DIR then
               local n = h; h = node_remove(h,h)
               node_free(n)
         end
         for box_rule in traverse(h) do
            if getid(box_rule)<id_rule then
               h = insert_before(h, box_rule, dir_pool[list_dir]())
            end
         end
         ensure_tex_attr(attr_dir, 0)
         setfield(ad, 'head', h)
      end
      stop_time_measure 'box_primitive_hook'
   end
end

-- vsplit
do
   local split_dir_whatsit, split_dir_head
   local cat_lp = luatexbase.catcodetables['latex-package']
   local sprint, scan_int, tex_getbox = tex.sprint, token.scan_int, tex.getbox
   function luatexja.direction.vsplit()
      local n = scan_int();
      local p = to_direct(tex_getbox(n))
      split_dir_head = nil
      if p then
         local bh = getlist(p)
         if getid(bh)==id_whatsit and getsubtype(bh)==sid_user and getfield(bh, 'user_id')==DIR 
            and node_next(bh) then
            ltjs.list_dir = has_attr(bh, attr_dir)
            local q = node_next(p)
            setfield(p, 'head', node_remove(bh,bh,bh))
            split_dir_head = bh
         end
      end
      sprint(cat_lp, '\\ltj@@orig@vsplit' .. tostring(n))
   end        
   local function dir_adjust_vpack(h, gc)
      start_time_measure 'direction_vpack'
      local hd = to_direct(h)
      if gc=='split_keep' then
         -- supply dir_whatsit
         hd = create_dir_whatsit_vbox(hd, gc)
         split_dir_whatsit = hd
      elseif gc=='split_off'  then
         if split_dir_head then
            ltjs.list_dir = has_attr(split_dir_head, attr_dir)
            hd = insert_before(hd, hd, split_dir_head)
            split_dir_head=nil
         end
         if split_dir_whatsit then
            -- adjust direction of 'split_keep'
            set_attr(split_dir_whatsit, attr_dir, ltjs.list_dir)
         end
         split_dir_whatsit=nil
      elseif gc=='preamble' then
         split_dir_whatsit=nil
      else
         adjust_badness(hd)
         -- hd = process_dir_node(create_dir_whatsit_vbox(hd, gc), gc)
         -- done in append_to_vpack callback
         hd = create_dir_whatsit_vbox(hd, gc)
         split_dir_whatsit=nil
      end
      stop_time_measure 'direction_vpack'
      return to_node(hd)
   end
   ltjb.add_to_callback('vpack_filter',
                        dir_adjust_vpack,
                        'ltj.direction', 10000)
end

do
   local function dir_adjust_pre_output(h, gc)
      return to_node(create_dir_whatsit_vbox(to_direct(h), gc))
   end
   ltjb.add_to_callback('pre_output_filter', dir_adjust_pre_output, 
                        'ltj.direction', 10000)
end

-- append_to_vlist filter: done in ltj-lineskip.lua

-- finalize (executed just before \shipout)
-- we supply correct pdfsavematrix nodes etc. inside dir_node
do
   local finalize_inner
   local function finalize_dir_node(db,new_dir)
      local b = getlist(db)
      while b and ((getid(b)~=id_hlist) and (getid(b)~=id_vlist)) do
         local ob = b; b = node_remove(b,b); setfield(db, 'head', b);
         node_free(ob)
      end
      finalize_inner(b)
      local w = getfield(b, 'width')
      local h = getfield(b, 'height')
      local d = getfield(b, 'depth')
      local dn_w = getfield(db, 'width')
      local dn_h = getfield(db, 'height')
      local dn_d = getfield(db, 'depth')
      local db_head, db_tail
      local t = dir_node_aux[get_box_dir(b, dir_yoko)%dir_math_mod][new_dir]
      t = t and t[getid(b)]; if not t then return end
      for _,v in ipairs(t) do
         local cmd, arg, nn = v[1], v[2]
         if cmd=='kern' then
            nn = node_new(id_kern, 1)
            setfield(nn, 'kern', arg(w, h, d, dn_w, dn_h, dn_d))
         elseif cmd=='whatsit' then
            nn = node_new(id_whatsit, arg)
         elseif cmd=='rotate' then
            nn = node_new(id_whatsit, sid_matrix)
            setfield(nn, 'data', arg)
         elseif cmd=='box' then
            nn = b; setfield(b, 'next', nil)
            setfield(nn, 'shift', arg(w, h, d, dn_w, dn_h, dn_d))
         end
         if db_head then
            insert_after(db_head, db_tail, nn)
            db_tail = nn
         else
            setfield(db, 'head', nn)
            db_head, db_tail = nn, nn
         end
      end
   end

   tex.setattribute(attr_dir, dir_yoko)
   local shipout_temp =  node_new(id_hlist)
   tex.setattribute(attr_dir, 0)

   finalize_inner = function (box)
      for n in traverse(getlist(box)) do
         local nid = getid(n)
         if (nid==id_hlist or nid==id_vlist) then
            local ndir = get_box_dir(n, dir_yoko)
            if ndir>=dir_node_auto then -- n is dir_node
               finalize_dir_node(n, ndir%dir_math_mod)
            else
               finalize_inner(n)
            end
         end
      end
   end
   local copy = node.direct.copy
   function luatexja.direction.shipout_lthook (head)
      start_time_measure 'box_primitive_hook'
      local a = to_direct(head)
      local a_dir = get_box_dir(a, dir_yoko)
      if a_dir~=dir_yoko then
         local b = create_dir_node(a, a_dir, dir_yoko, false)
         setfield(b, 'head', a); a = b
      end
      setfield(shipout_temp, 'head', a); finalize_inner(shipout_temp)
      a = copy(getlist(shipout_temp)); setfield(shipout_temp, 'head',nil)
      stop_time_measure 'box_primitive_hook'
      return to_node(a)
   end
end