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
|
if not modules then modules = { } end modules ['tabl-xtb'] = {
version = 1.001,
comment = "companion to tabl-xtb.mkvi",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[
This table mechanism is a combination between TeX and Lua. We do process
cells at the TeX end and inspect them at the Lua end. After some analysis
we have a second pass using the calculated widths, and if needed cells
will go through a third pass to get the heights right. This last pass is
avoided when possible which is why some code below looks a bit more
complex than needed. The reason for such optimizations is that each cells
is actually a framed instance and because tables like this can be hundreds
of pages we want to keep processing time reasonable.
To a large extend the behaviour is comparable with the way bTABLE/eTABLE
works and there is a module that maps that one onto this one. Eventually
this mechamism will be improved so that it can replace its older cousin.
]]--
-- todo: use linked list instead of r/c array
-- todo: we can use the sum of previously forced widths for column spans
local tonumber, next = tonumber, next
local commands = commands
local context = context
local tex = tex
local implement = interfaces.implement
local texgetcount = tex.getcount
local texsetcount = tex.setcount
local texgetdimen = tex.getdimen
local texsetdimen = tex.setdimen
local texget = tex.get
local format = string.format
local concat = table.concat
local points = number.points
local todimen = string.todimen
local context_beginvbox = context.beginvbox
local context_endvbox = context.endvbox
local context_blank = context.blank
local context_nointerlineskip = context.nointerlineskip
local context_dummyxcell = context.dummyxcell
local variables = interfaces.variables
local setmetatableindex = table.setmetatableindex
local settings_to_hash = utilities.parsers.settings_to_hash
local nuts = nodes.nuts -- here nuts gain hardly nothing
local tonut = nuts.tonut
local tonode = nuts.tonode
local getnext = nuts.getnext
local getprev = nuts.getprev
local getlist = nuts.getlist
local getfield = nuts.getfield
local getbox = nuts.getbox
local setfield = nuts.setfield
local setlink = nuts.setlink
local copy_node_list = nuts.copy_list
local hpack_node_list = nuts.hpack
local flush_node_list = nuts.flush_list
local takebox = nuts.takebox
local nodepool = nuts.pool
local new_glue = nodepool.glue
local new_kern = nodepool.kern
local new_penalty = nodepool.penalty
local new_hlist = nodepool.hlist
local v_stretch = variables.stretch
local v_normal = variables.normal
local v_width = variables.width
local v_height = variables.height
local v_repeat = variables["repeat"]
local v_max = variables.max
local v_fixed = variables.fixed
local v_auto = variables.auto
local v_before = variables.before
local v_after = variables.after
local v_both = variables.both
local v_samepage = variables.samepage
local v_tight = variables.tight
local xtables = { }
typesetters.xtables = xtables
local trace_xtable = false
local report_xtable = logs.reporter("xtable")
trackers.register("xtable.construct", function(v) trace_xtable = v end)
local null_mode = 0
local head_mode = 1
local foot_mode = 2
local more_mode = 3
local body_mode = 4
local namedmodes = { [0] =
"null",
"head",
"foot",
"next",
"body",
}
local stack, data = { }, nil
function xtables.create(settings)
table.insert(stack,data)
local rows = { }
local widths = { }
local heights = { }
local depths = { }
local spans = { }
local distances = { }
local autowidths = { }
local modes = { }
local fixedrows = { }
local fixedcolumns = { }
-- local fixedcspans = { }
local frozencolumns = { }
local options = { }
local rowproperties = { }
data = {
rows = rows,
widths = widths,
heights = heights,
depths = depths,
spans = spans,
distances = distances,
modes = modes,
autowidths = autowidths,
fixedrows = fixedrows,
fixedcolumns = fixedcolumns,
-- fixedcspans = fixedcspans,
frozencolumns = frozencolumns,
options = options,
nofrows = 0,
nofcolumns = 0,
currentrow = 0,
currentcolumn = 0,
settings = settings or { },
rowproperties = rowproperties,
}
local function add_zero(t,k)
t[k] = 0
return 0
end
local function add_table(t,k)
local v = { }
t[k] = v
return v
end
local function add_cell(row,c)
local cell = {
nx = 0,
ny = 0,
list = false,
wd = 0,
ht = 0,
dp = 0,
}
row[c] = cell
if c > data.nofcolumns then
data.nofcolumns = c
end
return cell
end
local function add_row(rows,r)
local row = { }
setmetatableindex(row,add_cell)
rows[r] = row
if r > data.nofrows then
data.nofrows = r
end
return row
end
setmetatableindex(rows,add_row)
setmetatableindex(widths,add_zero)
setmetatableindex(heights,add_zero)
setmetatableindex(depths,add_zero)
setmetatableindex(distances,add_zero)
setmetatableindex(modes,add_zero)
setmetatableindex(fixedrows,add_zero)
setmetatableindex(fixedcolumns,add_zero)
setmetatableindex(options,add_table)
-- setmetatableindex(fixedcspans,add_table)
--
local globaloptions = settings_to_hash(settings.option)
--
settings.columndistance = tonumber(settings.columndistance) or 0
settings.rowdistance = tonumber(settings.rowdistance) or 0
settings.leftmargindistance = tonumber(settings.leftmargindistance) or 0
settings.rightmargindistance = tonumber(settings.rightmargindistance) or 0
settings.options = globaloptions
settings.textwidth = tonumber(settings.textwidth) or texget("hsize")
settings.lineheight = tonumber(settings.lineheight) or texgetdimen("lineheight")
settings.maxwidth = tonumber(settings.maxwidth) or settings.textwidth/8
-- if #stack > 0 then
-- settings.textwidth = texget("hsize")
-- end
data.criterium_v = 2 * data.settings.lineheight
data.criterium_h = .75 * data.settings.textwidth
--
data.tight = globaloptions[v_tight] and true or false
end
function xtables.initialize_reflow_width(option,width)
local r = data.currentrow
local c = data.currentcolumn + 1
local drc = data.rows[r][c]
drc.nx = texgetcount("c_tabl_x_nx")
drc.ny = texgetcount("c_tabl_x_ny")
local distances = data.distances
local distance = texgetdimen("d_tabl_x_distance")
if distance > distances[c] then
distances[c] = distance
end
if option and option ~= "" then
local options = settings_to_hash(option)
data.options[r][c] = options
if options[v_fixed] then
data.frozencolumns[c] = true
end
end
data.currentcolumn = c
end
-- todo: we can better set the cell values in one go
function xtables.set_reflow_width()
local r = data.currentrow
local c = data.currentcolumn
local rows = data.rows
local row = rows[r]
while row[c].span do -- can also be previous row ones
c = c + 1
end
local tb = getbox("b_tabl_x")
local drc = row[c]
--
drc.list = true -- we don't need to keep the content around as we're in trial mode (no: copy_node_list(tb))
--
local width = getfield(tb,"width")
local height = getfield(tb,"height")
local depth = getfield(tb,"depth")
--
local widths = data.widths
local heights = data.heights
local depths = data.depths
local cspan = drc.nx
if cspan < 2 then
if width > widths[c] then
widths[c] = width
end
else
local options = data.options[r][c]
if data.tight then
-- no check
elseif not options then
if width > widths[c] then
widths[c] = width
end
elseif not options[v_tight] then
if width > widths[c] then
widths[c] = width
end
end
end
-- if cspan > 1 then
-- local f = data.fixedcspans[c]
-- local w = f[cspan] or 0
-- if width > w then
-- f[cspan] = width -- maybe some day a solution for autospanmax and so
-- end
-- end
if drc.ny < 2 then
if height > heights[r] then
heights[r] = height
end
if depth > depths[r] then
depths[r] = depth
end
end
--
drc.wd = width
drc.ht = height
drc.dp = depth
--
local dimensionstate = texgetcount("frameddimensionstate")
local fixedcolumns = data.fixedcolumns
local fixedrows = data.fixedrows
if dimensionstate == 1 then
if cspan > 1 then
-- ignore width
elseif width > fixedcolumns[c] then -- how about a span here?
fixedcolumns[c] = width
end
elseif dimensionstate == 2 then
fixedrows[r] = height
elseif dimensionstate == 3 then
fixedrows[r] = height -- width
fixedcolumns[c] = width -- height
elseif width <= data.criterium_h and height >= data.criterium_v then
-- somewhat tricky branch
if width > fixedcolumns[c] then -- how about a span here?
-- maybe an image, so let's fix
fixedcolumns[c] = width
end
end
--
-- -- this fails so not good enough predictor
--
-- -- \startxtable
-- -- \startxrow
-- -- \startxcell knuth \stopxcell
-- -- \startxcell \input knuth \stopxcell
-- -- \stopxrow
--
-- else
-- local o = data.options[r][c]
-- if o and o[v_auto] then -- new per 5/5/2014 - removed per 15/07/2014
-- data.autowidths[c] = true
-- else
-- -- no dimensions are set in the cell
-- if width <= data.criterium_h and height >= data.criterium_v then
-- -- somewhat tricky branch
-- if width > fixedcolumns[c] then -- how about a span here?
-- -- maybe an image, so let's fix
-- fixedcolumns[c] = width
-- end
-- else
-- -- safeguard as it could be text that can be recalculated
-- -- and the previous branch could have happened in a previous
-- -- row and then forces a wrong one-liner in a multiliner
-- if width > fixedcolumns[c] then
-- data.autowidths[c] = true -- new per 5/5/2014 - removed per 15/07/2014
-- end
-- end
-- end
-- end
--
--
drc.dimensionstate = dimensionstate
--
local nx, ny = drc.nx, drc.ny
if nx > 1 or ny > 1 then
local spans = data.spans
local self = true
for y=1,ny do
for x=1,nx do
if self then
self = false
else
local ry = r + y - 1
local cx = c + x - 1
if y > 1 then
spans[ry] = true
end
rows[ry][cx].span = true
end
end
end
c = c + nx - 1
end
if c > data.nofcolumns then
data.nofcolumns = c
end
data.currentcolumn = c
end
function xtables.initialize_reflow_height()
local r = data.currentrow
local c = data.currentcolumn + 1
local rows = data.rows
local row = rows[r]
while row[c].span do -- can also be previous row ones
c = c + 1
end
data.currentcolumn = c
local widths = data.widths
local w = widths[c]
local drc = row[c]
for x=1,drc.nx-1 do
w = w + widths[c+x]
end
texsetdimen("d_tabl_x_width",w)
local dimensionstate = drc.dimensionstate or 0
if dimensionstate == 1 or dimensionstate == 3 then
-- width was fixed so height is known
texsetcount("c_tabl_x_skip_mode",1)
elseif dimensionstate == 2 then
-- height is enforced
texsetcount("c_tabl_x_skip_mode",1)
elseif data.autowidths[c] then
-- width has changed so we need to recalculate the height
texsetcount("c_tabl_x_skip_mode",0)
elseif data.fixedcolumns[c] then
texsetcount("c_tabl_x_skip_mode",0) -- new
else
texsetcount("c_tabl_x_skip_mode",1)
end
end
function xtables.set_reflow_height()
local r = data.currentrow
local c = data.currentcolumn
local rows = data.rows
local row = rows[r]
-- while row[c].span do -- we could adapt drc.nx instead
-- c = c + 1
-- end
local tb = getbox("b_tabl_x")
local drc = row[c]
--
local width = getfield(tb,"width")
local height = getfield(tb,"height")
local depth = getfield(tb,"depth")
--
if drc.ny < 2 then
if data.fixedrows[r] == 0 then -- and drc.dimensionstate < 2
local heights = data.heights
local depths = data.depths
if height > heights[r] then
heights[r] = height
end
if depth > depths[r] then
depths[r] = depth
end
end
end
--
drc.wd = width
drc.ht = height
drc.dp = depth
--
-- c = c + drc.nx - 1
-- data.currentcolumn = c
end
function xtables.initialize_construct()
local r = data.currentrow
local c = data.currentcolumn + 1
local rows = data.rows
local row = rows[r]
while row[c].span do -- can also be previous row ones
c = c + 1
end
data.currentcolumn = c
local widths = data.widths
local heights = data.heights
local depths = data.depths
--
local drc = row[c]
local wd = drc.wd
local ht = drc.ht
local dp = drc.dp
--
local width = widths[c]
local height = heights[r]
local depth = depths[r]
--
for x=1,drc.nx-1 do
width = width + widths[c+x]
end
--
local total = height + depth
local ny = drc.ny
if ny > 1 then
for y=1,ny-1 do
local nxt = r + y
total = total + heights[nxt] + depths[nxt]
end
end
--
texsetdimen("d_tabl_x_width",width)
texsetdimen("d_tabl_x_height",total)
texsetdimen("d_tabl_x_depth",0) -- for now
end
function xtables.set_construct()
local r = data.currentrow
local c = data.currentcolumn
local rows = data.rows
local row = rows[r]
-- while row[c].span do -- can also be previous row ones
-- c = c + 1
-- end
local drc = row[c]
-- this will change as soon as in luatex we can reset a box list without freeing
drc.list = takebox("b_tabl_x")
-- c = c + drc.nx - 1
-- data.currentcolumn = c
end
local function showwidths(where,widths,autowidths)
local result = { }
for i=1,#widths do
result[#result+1] = format("%12s%s",points(widths[i]),autowidths[i] and "*" or " ")
end
return report_xtable("%s widths: %s",where,concat(result," "))
end
function xtables.reflow_width()
local nofrows = data.nofrows
local nofcolumns = data.nofcolumns
local rows = data.rows
for r=1,nofrows do
local row = rows[r]
for c=1,nofcolumns do
local drc = row[c]
if drc.list then
-- flush_node_list(drc.list)
drc.list = false
end
end
end
-- spread
local settings = data.settings
local options = settings.options
local maxwidth = settings.maxwidth
-- calculate width
local widths = data.widths
local heights = data.heights
local depths = data.depths
local distances = data.distances
local autowidths = data.autowidths
local fixedcolumns = data.fixedcolumns
local frozencolumns = data.frozencolumns
local width = 0
local distance = 0
local nofwide = 0
local widetotal = 0
local available = settings.textwidth - settings.leftmargindistance - settings.rightmargindistance
if trace_xtable then
showwidths("stage 1",widths,autowidths)
end
local noffrozen = 0
-- inspect(data.fixedcspans)
if options[v_max] then
for c=1,nofcolumns do
width = width + widths[c]
if width > maxwidth then
autowidths[c] = true
nofwide = nofwide + 1
widetotal = widetotal + widths[c]
end
if c < nofcolumns then
distance = distance + distances[c]
end
if frozencolumns[c] then
noffrozen = noffrozen + 1 -- brr, should be nx or so
end
end
else
for c=1,nofcolumns do -- also keep track of forced
local fixedwidth = fixedcolumns[c]
if fixedwidth > 0 then
widths[c] = fixedwidth
width = width + fixedwidth
else
local wc = widths[c]
width = width + wc
-- if width > maxwidth then
if wc > maxwidth then -- per 2015-08-09
autowidths[c] = true
nofwide = nofwide + 1
widetotal = widetotal + wc
end
end
if c < nofcolumns then
distance = distance + distances[c]
end
if frozencolumns[c] then
noffrozen = noffrozen + 1 -- brr, should be nx or so
end
end
end
if trace_xtable then
showwidths("stage 2",widths,autowidths)
end
local delta = available - width - distance - (nofcolumns-1) * settings.columndistance
if delta == 0 then
-- nothing to be done
if trace_xtable then
report_xtable("perfect fit")
end
elseif delta > 0 then
-- we can distribute some
if not options[v_stretch] then
-- not needed
if trace_xtable then
report_xtable("too wide but no stretch, delta %p",delta)
end
elseif options[v_width] then
local factor = delta / width
if trace_xtable then
report_xtable("proportional stretch, delta %p, width %p, factor %a",delta,width,factor)
end
for c=1,nofcolumns do
widths[c] = widths[c] + factor * widths[c]
end
else
-- frozen -> a column with option=fixed will not stretch
local extra = delta / (nofcolumns - noffrozen)
if trace_xtable then
report_xtable("normal stretch, delta %p, extra %p",delta,extra)
end
for c=1,nofcolumns do
if not frozencolumns[c] then
widths[c] = widths[c] + extra
end
end
end
elseif nofwide > 0 then
while true do
done = false
local available = (widetotal + delta) / nofwide
if trace_xtable then
report_xtable("shrink check, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available)
end
for c=1,nofcolumns do
if autowidths[c] and available >= widths[c] then
autowidths[c] = nil
nofwide = nofwide - 1
widetotal = widetotal - widths[c]
done = true
end
end
if not done then
break
end
end
-- maybe also options[v_width] here but tricky as width does not say
-- much about amount
if options[v_width] then -- not that much (we could have a clever vpack loop balancing .. no fun)
local factor = (widetotal + delta) / width
if trace_xtable then
report_xtable("proportional shrink used, total %p, delta %p, columns %s, factor %s",widetotal,delta,nofwide,factor)
end
for c=1,nofcolumns do
if autowidths[c] then
widths[c] = factor * widths[c]
end
end
else
local available = (widetotal + delta) / nofwide
if trace_xtable then
report_xtable("normal shrink used, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available)
end
for c=1,nofcolumns do
if autowidths[c] then
widths[c] = available
end
end
end
end
if trace_xtable then
showwidths("stage 3",widths,autowidths)
end
--
data.currentrow = 0
data.currentcolumn = 0
--
-- inspect(data)
end
function xtables.reflow_height()
data.currentrow = 0
data.currentcolumn = 0
local settings = data.settings
--
-- analyze ny
--
local nofrows = data.nofrows
local nofcolumns = data.nofcolumns
local widths = data.widths
local heights = data.heights
local depths = data.depths
--
for r=1,nofrows do
for c=1,nofcolumns do
local drc = data.rows[r][c]
if drc then
local ny = drc.ny
if ny > 1 then
local height = heights[r]
local depth = depths[r]
local total = height + depth
local htdp = drc.ht + drc.dp
for y=1,ny-1 do
local nxt = r + y
total = total + heights[nxt] + depths[nxt]
end
local delta = htdp - total
if delta > 0 then
delta = delta / ny
for y=0,ny-1 do
local nxt = r + y
heights[nxt] = heights[nxt] + delta
end
end
end
end
end
end
--
if settings.options[v_height] then
local totalheight = 0
local totaldepth = 0
for i=1,nofrows do
totalheight = totalheight + heights[i]
totalheight = totalheight + depths [i]
end
local total = totalheight + totaldepth
local leftover = settings.textheight - total
if leftover > 0 then
local leftheight = (totalheight / total) * leftover / #heights
local leftdepth = (totaldepth / total) * leftover / #depths
for i=1,nofrows do
heights[i] = heights[i] + leftheight
depths [i] = depths [i] + leftdepth
end
end
end
--
-- inspect(data)
end
local function showspans(data)
local rows = data.rows
local modes = data.modes
local nofcolumns = data.nofcolumns
local nofrows = data.nofrows
for r=1,nofrows do
local line = { }
local row = rows[r]
for c=1,nofcolumns do
local cell =row[c]
if cell.list then
line[#line+1] = "list"
elseif cell.span then
line[#line+1] = "span"
else
line[#line+1] = "none"
end
end
report_xtable("%3d : %s : % t",r,namedmodes[modes[r]] or "----",line)
end
end
function xtables.construct()
local rows = data.rows
local heights = data.heights
local depths = data.depths
local widths = data.widths
local spans = data.spans
local distances = data.distances
local modes = data.modes
local settings = data.settings
local nofcolumns = data.nofcolumns
local nofrows = data.nofrows
local columndistance = settings.columndistance
local rowdistance = settings.rowdistance
local leftmargindistance = settings.leftmargindistance
local rightmargindistance = settings.rightmargindistance
local rowproperties = data.rowproperties
-- ranges can be mixes so we collect
if trace_xtable then
showspans(data)
end
local ranges = {
[head_mode] = { },
[foot_mode] = { },
[more_mode] = { },
[body_mode] = { },
}
for r=1,nofrows do
local m = modes[r]
if m == 0 then
m = body_mode
end
local range = ranges[m]
range[#range+1] = r
end
-- todo: hook in the splitter ... the splitter can ask for a chunk of
-- a certain size ... no longer a split memory issue then and header
-- footer then has to happen here too .. target height
local function packaged_column(r)
local row = rows[r]
local start = nil
local stop = nil
if leftmargindistance > 0 then
start = new_kern(leftmargindistance)
stop = start
end
local hasspan = false
for c=1,nofcolumns do
local drc = row[c]
if not hasspan then
hasspan = drc.span
end
local list = drc.list
if list then
setfield(list,"shift",getfield(list,"height") + getfield(list,"depth"))
-- list = hpack_node_list(list) -- is somehow needed
-- setfield(list,"width",0)
-- setfield(list,"height",0)
-- setfield(list,"depth",0)
-- faster:
local h = new_hlist(list)
list = h
--
if start then
setlink(stop,list)
else
start = list
end
stop = list
end
local step = widths[c]
if c < nofcolumns then
step = step + columndistance + distances[c]
end
local kern = new_kern(step)
if stop then
setlink(stop,kern)
else -- can be first spanning next row (ny=...)
start = kern
end
stop = kern
end
if start then
if rightmargindistance > 0 then
local kern = new_kern(rightmargindistance)
setlink(stop,kern)
-- stop = kern
end
return start, heights[r] + depths[r], hasspan
end
end
local function collect_range(range)
local result, nofr = { }, 0
local nofrange = #range
for i=1,#range do
local r = range[i]
-- local row = rows[r]
local list, size, hasspan = packaged_column(r)
if list then
if hasspan and nofr > 0 then
result[nofr][4] = true
end
nofr = nofr + 1
local rp = rowproperties[r]
-- we have a direction issue here but hpack_node_list(list,0,"exactly","TLT") cannot be used
-- due to the fact that we need the width
local hbox = hpack_node_list(list)
setfield(hbox,"dir","TLT")
result[nofr] = {
hbox,
size,
i < nofrange and rowdistance > 0 and rowdistance or false, -- might move
false,
rp and rp.samepage or false,
}
end
end
if nofr > 0 then
-- the [5] slot gets the after break
result[1] [5] = false
result[nofr][5] = false
for i=2,nofr-1 do
local r = result[i]
if r == v_both or r == v_before then
result[i-1][5] = true
elseif r == v_after then
result[i][5] = true
end
end
end
return result
end
local body = collect_range(ranges[body_mode])
data.results = {
[head_mode] = collect_range(ranges[head_mode]),
[foot_mode] = collect_range(ranges[foot_mode]),
[more_mode] = collect_range(ranges[more_mode]),
[body_mode] = body,
}
if #body == 0 then
texsetcount("global","c_tabl_x_state",0)
texsetdimen("global","d_tabl_x_final_width",0)
else
texsetcount("global","c_tabl_x_state",1)
texsetdimen("global","d_tabl_x_final_width",getfield(body[1][1],"width"))
end
end
-- todo: join as that is as efficient as fushing multiple
local function inject(row,copy,package)
local list = row[1]
if copy then
row[1] = copy_node_list(list)
end
if package then
context_beginvbox()
context(tonode(list))
context(tonode(new_kern(row[2])))
context_endvbox()
context_nointerlineskip() -- figure out a better way
if row[4] then
-- nothing as we have a span
elseif row[5] then
if row[3] then
context_blank { v_samepage, row[3] .. "sp" }
else
context_blank { v_samepage }
end
elseif row[3] then
context_blank { row[3] .. "sp" } -- why blank ?
else
context(tonode(new_glue(0)))
end
else
context(tonode(list))
context(tonode(new_kern(row[2])))
if row[3] then
context(tonode(new_glue(row[3])))
end
end
end
local function total(row,distance)
local n = #row > 0 and rowdistance or 0
for i=1,#row do
local ri = row[i]
n = n + ri[2] + (ri[3] or 0)
end
return n
end
-- local function append(list,what)
-- for i=1,#what do
-- local l = what[i]
-- list[#list+1] = l[1]
-- local k = l[2] + (l[3] or 0)
-- if k ~= 0 then
-- list[#list+1] = new_kern(k)
-- end
-- end
-- end
local function spanheight(body,i)
local height, n = 0, 1
while true do
local bi = body[i]
if bi then
height = height + bi[2] + (bi[3] or 0)
if bi[4] then
n = n + 1
i = i + 1
else
break
end
else
break
end
end
return height, n
end
function xtables.flush(directives) -- todo split by size / no inbetween then .. glue list kern blank
local height = directives.height
local method = directives.method or v_normal
local settings = data.settings
local results = data.results
local rowdistance = settings.rowdistance
local head = results[head_mode]
local foot = results[foot_mode]
local more = results[more_mode]
local body = results[body_mode]
local repeatheader = settings.header == v_repeat
local repeatfooter = settings.footer == v_repeat
if height and height > 0 then
context_beginvbox()
local bodystart = data.bodystart or 1
local bodystop = data.bodystop or #body
if bodystart > 0 and bodystart <= bodystop then
local bodysize = height
local footsize = total(foot,rowdistance)
local headsize = total(head,rowdistance)
local moresize = total(more,rowdistance)
local firstsize, firstspans = spanheight(body,bodystart)
if bodystart == 1 then -- first chunk gets head
bodysize = bodysize - headsize - footsize
if headsize > 0 and bodysize >= firstsize then
for i=1,#head do
inject(head[i],repeatheader)
end
if rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
if not repeatheader then
results[head_mode] = { }
end
end
elseif moresize > 0 then -- following chunk gets next
bodysize = bodysize - footsize - moresize
if bodysize >= firstsize then
for i=1,#more do
inject(more[i],true)
end
if rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
end
elseif headsize > 0 and repeatheader then -- following chunk gets head
bodysize = bodysize - footsize - headsize
if bodysize >= firstsize then
for i=1,#head do
inject(head[i],true)
end
if rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
end
else -- following chunk gets nothing
bodysize = bodysize - footsize
end
if bodysize >= firstsize then
local i = bodystart
while i <= bodystop do -- room for improvement
local total, spans = spanheight(body,i)
local bs = bodysize - total
if bs > 0 then
bodysize = bs
for s=1,spans do
inject(body[i])
body[i] = nil
i = i + 1
end
bodystart = i
else
break
end
end
if bodystart > bodystop then
-- all is flushed and footer fits
if footsize > 0 then
if rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
for i=1,#foot do
inject(foot[i])
end
results[foot_mode] = { }
end
results[body_mode] = { }
texsetcount("global","c_tabl_x_state",0)
else
-- some is left so footer is delayed
-- todo: try to flush a few more lines
if repeatfooter and footsize > 0 then
if rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
for i=1,#foot do
inject(foot[i],true)
end
else
-- todo: try to fit more of body
end
texsetcount("global","c_tabl_x_state",2)
end
else
if firstsize > height then
-- get rid of the too large cell
for s=1,firstspans do
inject(body[bodystart])
body[bodystart] = nil
bodystart = bodystart + 1
end
end
texsetcount("global","c_tabl_x_state",2) -- 1
end
else
texsetcount("global","c_tabl_x_state",0)
end
data.bodystart = bodystart
data.bodystop = bodystop
context_endvbox()
else
if method == variables.split then
-- maybe also a non float mode with header/footer repeat although
-- we can also use a float without caption
for i=1,#head do
inject(head[i],false,true)
end
if #head > 0 and rowdistance > 0 then
context_blank { rowdistance .. "sp" }
end
for i=1,#body do
inject(body[i],false,true)
end
if #foot > 0 and rowdistance > 0 then
context_blank { rowdistance .. "sp" }
end
for i=1,#foot do
inject(foot[i],false,true)
end
else -- normal
context_beginvbox()
for i=1,#head do
inject(head[i])
end
if #head > 0 and rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
for i=1,#body do
inject(body[i])
end
if #foot > 0 and rowdistance > 0 then
context(tonode(new_glue(rowdistance)))
end
for i=1,#foot do
inject(foot[i])
end
context_endvbox()
end
results[head_mode] = { }
results[body_mode] = { }
results[foot_mode] = { }
texsetcount("global","c_tabl_x_state",0)
end
end
function xtables.cleanup()
for mode, result in next, data.results do
for _, r in next, result do
flush_node_list(r[1])
end
end
-- local rows = data.rows
-- for i=1,#rows do
-- local row = rows[i]
-- for i=1,#row do
-- local cell = row[i]
-- local list = cell.list
-- if list then
-- cell.width = getfield(list,"width")
-- cell.height = getfield(list,"height")
-- cell.depth = getfield(list,"depth")
-- cell.list = true
-- end
-- end
-- end
-- data.result = nil
-- inspect(data)
data = table.remove(stack)
end
function xtables.next_row(specification)
local r = data.currentrow + 1
data.modes[r] = texgetcount("c_tabl_x_mode")
data.currentrow = r
data.currentcolumn = 0
data.rowproperties[r] = specification
end
function xtables.finish_row()
local n = data.nofcolumns - data.currentcolumn
if n > 0 then
-- message
for i=1,n do
context_dummyxcell()
end
end
end
-- eventually we might only have commands
implement {
name = "x_table_create",
actions = xtables.create,
arguments = {
{
{ "option" },
{ "textwidth", "dimen" },
{ "textheight", "dimen" },
{ "maxwidth", "dimen" },
{ "lineheight", "dimen" },
{ "columndistance", "dimen" },
{ "leftmargindistance", "dimen" },
{ "rightmargindistance", "dimen" },
{ "rowdistance", "dimen" },
{ "header" },
{ "footer" },
}
}
}
implement {
name = "x_table_flush",
actions = xtables.flush,
arguments = {
{
{ "method" },
{ "height", "dimen" }
}
}
}
implement { name = "x_table_reflow_width", actions = xtables.reflow_width }
implement { name = "x_table_reflow_height", actions = xtables.reflow_height }
implement { name = "x_table_construct", actions = xtables.construct }
implement { name = "x_table_cleanup", actions = xtables.cleanup }
implement { name = "x_table_next_row", actions = xtables.next_row }
implement { name = "x_table_next_row_option", actions = xtables.next_row, arguments = "string" }
implement { name = "x_table_finish_row", actions = xtables.finish_row }
implement { name = "x_table_init_reflow_width", actions = xtables.initialize_reflow_width }
implement { name = "x_table_init_reflow_height", actions = xtables.initialize_reflow_height }
implement { name = "x_table_init_reflow_width_option", actions = xtables.initialize_reflow_width, arguments = "string" }
implement { name = "x_table_init_reflow_height_option", actions = xtables.initialize_reflow_height, arguments = "string" }
implement { name = "x_table_init_construct", actions = xtables.initialize_construct }
implement { name = "x_table_set_reflow_width", actions = xtables.set_reflow_width }
implement { name = "x_table_set_reflow_height", actions = xtables.set_reflow_height }
implement { name = "x_table_set_construct", actions = xtables.set_construct }
implement { name = "x_table_r", actions = function() context(data.currentrow or 0) end }
implement { name = "x_table_c", actions = function() context(data.currentcolumn or 0) end }
-- experiment:
do
local context = context
local startxtable = context.startxtable
local stopxtable = context.stopxtable
local startcollecting = context.startcollecting
local stopcollecting = context.stopcollecting
function context.startxtable(...)
startcollecting()
startxtable(...)
end
function context.stopxtable()
stopxtable()
stopcollecting()
end
end
|