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
|
if not modules then modules = { } end modules ['lpdf-ini'] = {
version = 1.001,
comment = "companion to lpdf-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local setmetatable, getmetatable, type, next, tostring, tonumber, rawset = setmetatable, getmetatable, type, next, tostring, tonumber, rawset
local char, byte, format, gsub, concat, match, sub, gmatch = string.char, string.byte, string.format, string.gsub, table.concat, string.match, string.sub, string.gmatch
local utfchar, utfvalues = utf.char, utf.values
local sind, cosd = math.sind, math.cosd
local lpegmatch, P, C, R, S, Cc, Cs = lpeg.match, lpeg.P, lpeg.C, lpeg.R, lpeg.S, lpeg.Cc, lpeg.Cs
local formatters = string.formatters
local pdfreserveobject = pdf.reserveobj
local pdfimmediateobject = pdf.immediateobj
local pdfdeferredobject = pdf.obj
local pdfreferenceobject = pdf.refobj
local trace_finalizers = false trackers.register("backend.finalizers", function(v) trace_finalizers = v end)
local trace_resources = false trackers.register("backend.resources", function(v) trace_resources = v end)
local trace_objects = false trackers.register("backend.objects", function(v) trace_objects = v end)
local trace_detail = false trackers.register("backend.detail", function(v) trace_detail = v end)
local report_objects = logs.reporter("backend","objects")
local report_finalizing = logs.reporter("backend","finalizing")
local backends = backends
backends.pdf = backends.pdf or {
comment = "backend for directly generating pdf output",
nodeinjections = { },
codeinjections = { },
registrations = { },
tables = { },
}
lpdf = lpdf or { }
local lpdf = lpdf
local function tosixteen(str) -- an lpeg might be faster (no table)
if not str or str == "" then
return "<feff>" -- not () as we want an indication that it's unicode
else
local r, n = { "<feff" }, 1
for b in utfvalues(str) do
n = n + 1
if b < 0x10000 then
r[n] = format("%04x",b)
else
r[n] = format("%04x%04x",b/1024+0xD800,b%1024+0xDC00)
end
end
n = n + 1
r[n] = ">"
return concat(r)
end
end
lpdf.tosixteen = tosixteen
-- lpeg is some 5 times faster than gsub (in test) on escaping
-- local escapes = {
-- ["\\"] = "\\\\",
-- ["/"] = "\\/", ["#"] = "\\#",
-- ["<"] = "\\<", [">"] = "\\>",
-- ["["] = "\\[", ["]"] = "\\]",
-- ["("] = "\\(", [")"] = "\\)",
-- }
--
-- local escaped = Cs(Cc("(") * (S("\\/#<>[]()")/escapes + P(1))^0 * Cc(")"))
--
-- local function toeight(str)
-- if not str or str == "" then
-- return "()"
-- else
-- return lpegmatch(escaped,str)
-- end
-- end
--
-- -- no need for escaping .. just use unicode instead
-- \0 \t \n \r \f <space> ( ) [ ] { } / %
local function toeight(str)
return "(" .. str .. ")"
end
lpdf.toeight = toeight
--~ local escaped = lpeg.Cs((lpeg.S("\0\t\n\r\f ()[]{}/%")/function(s) return format("#%02X",byte(s)) end + lpeg.P(1))^0)
--~ local function cleaned(str)
--~ return (str and str ~= "" and lpegmatch(escaped,str)) or ""
--~ end
--~ lpdf.cleaned = cleaned -- not public yet
local function merge_t(a,b)
local t = { }
for k,v in next, a do t[k] = v end
for k,v in next, b do t[k] = v end
return setmetatable(t,getmetatable(a))
end
local f_key_value = formatters["/%s %s"]
local f_key_dictionary = formatters["/%s << % t >>"]
local f_dictionary = formatters["<< % t >>"]
local f_key_array = formatters["/%s [ % t ]"]
local f_array = formatters["[ % t ]"]
local tostring_a, tostring_d
tostring_d = function(t,contentonly,key)
if not next(t) then
if contentonly then
return ""
else
return "<< >>"
end
else
local r, rn = { }, 0
for k, v in next, t do
rn = rn + 1
local tv = type(v)
if tv == "string" then
r[rn] = f_key_value(k,toeight(v))
elseif tv == "unicode" then
r[rn] = f_key_value(k,tosixteen(v))
elseif tv == "table" then
local mv = getmetatable(v)
if mv and mv.__lpdftype then
r[rn] = f_key_value(k,tostring(v))
elseif v[1] then
r[rn] = f_key_value(k,tostring_a(v))
else
r[rn] = f_key_value(k,tostring_d(v))
end
else
r[rn] = f_key_value(k,tostring(v))
end
end
if contentonly then
return concat(r," ")
elseif key then
return f_key_dictionary(key,r)
else
return f_dictionary(r)
end
end
end
tostring_a = function(t,contentonly,key)
local tn = #t
if tn == 0 then
if contentonly then
return ""
else
return "[ ]"
end
else
local r = { }
for k=1,tn do
local v = t[k]
local tv = type(v)
if tv == "string" then
r[k] = toeight(v)
elseif tv == "unicode" then
r[k] = tosixteen(v)
elseif tv == "table" then
local mv = getmetatable(v)
local mt = mv and mv.__lpdftype
if mt then
r[k] = tostring(v)
elseif v[1] then
r[k] = tostring_a(v)
else
r[k] = tostring_d(v)
end
else
r[k] = tostring(v)
end
end
if contentonly then
return concat(r, " ")
elseif key then
return f_key_array(key,r)
else
return f_array(r)
end
end
end
local tostring_x = function(t) return concat(t, " ") end
local tostring_s = function(t) return toeight(t[1]) end
local tostring_u = function(t) return tosixteen(t[1]) end
local tostring_n = function(t) return tostring(t[1]) end -- tostring not needed
local tostring_c = function(t) return t[1] end -- already prefixed (hashed)
local tostring_z = function() return "null" end
local tostring_t = function() return "true" end
local tostring_f = function() return "false" end
local tostring_r = function(t) local n = t[1] return n and n > 0 and (n .. " 0 R") or "NULL" end
local tostring_v = function(t)
local s = t[1]
if type(s) == "table" then
return concat(s,"")
else
return s
end
end
local function value_x(t) return t end -- the call is experimental
local function value_s(t,key) return t[1] end -- the call is experimental
local function value_u(t,key) return t[1] end -- the call is experimental
local function value_n(t,key) return t[1] end -- the call is experimental
local function value_c(t) return sub(t[1],2) end -- the call is experimental
local function value_d(t) return tostring_d(t,true) end -- the call is experimental
local function value_a(t) return tostring_a(t,true) end -- the call is experimental
local function value_z() return nil end -- the call is experimental
local function value_t(t) return t.value or true end -- the call is experimental
local function value_f(t) return t.value or false end -- the call is experimental
local function value_r() return t[1] or 0 end -- the call is experimental -- NULL
local function value_v() return t[1] end -- the call is experimental
local function add_x(t,k,v) rawset(t,k,tostring(v)) end
local mt_x = { __lpdftype = "stream", __tostring = tostring_x, __call = value_x, __newindex = add_x }
local mt_d = { __lpdftype = "dictionary", __tostring = tostring_d, __call = value_d }
local mt_a = { __lpdftype = "array", __tostring = tostring_a, __call = value_a }
local mt_u = { __lpdftype = "unicode", __tostring = tostring_u, __call = value_u }
local mt_s = { __lpdftype = "string", __tostring = tostring_s, __call = value_s }
local mt_n = { __lpdftype = "number", __tostring = tostring_n, __call = value_n }
local mt_c = { __lpdftype = "constant", __tostring = tostring_c, __call = value_c }
local mt_z = { __lpdftype = "null", __tostring = tostring_z, __call = value_z }
local mt_t = { __lpdftype = "true", __tostring = tostring_t, __call = value_t }
local mt_f = { __lpdftype = "false", __tostring = tostring_f, __call = value_f }
local mt_r = { __lpdftype = "reference", __tostring = tostring_r, __call = value_r }
local mt_v = { __lpdftype = "verbose", __tostring = tostring_v, __call = value_v }
local function pdfstream(t) -- we need to add attributes
if t then
for i=1,#t do
t[i] = tostring(t[i])
end
end
return setmetatable(t or { },mt_x)
end
local function pdfdictionary(t)
return setmetatable(t or { },mt_d)
end
local function pdfarray(t)
if type(t) == "string" then
return setmetatable({ t },mt_a)
else
return setmetatable(t or { },mt_a)
end
end
local function pdfstring(str,default)
return setmetatable({ str or default or "" },mt_s)
end
local function pdfunicode(str,default)
return setmetatable({ str or default or "" },mt_u)
end
local cache = { } -- can be weak
local function pdfnumber(n,default) -- 0-10
n = n or default
local c = cache[n]
if not c then
c = setmetatable({ n },mt_n)
-- cache[n] = c -- too many numbers
end
return c
end
for i=-1,9 do cache[i] = pdfnumber(i) end
local cache = { } -- can be weak
local forbidden, replacements = "\0\t\n\r\f ()[]{}/%%#\\", { } -- table faster than function
for s in gmatch(forbidden,".") do
replacements[s] = format("#%02x",byte(s))
end
local escaped = Cs(Cc("/") * (S(forbidden)/replacements + P(1))^0)
local function pdfconstant(str,default)
str = str or default or ""
local c = cache[str]
if not c then
-- c = setmetatable({ "/" .. str },mt_c)
c = setmetatable({ lpegmatch(escaped,str) },mt_c)
cache[str] = c
end
return c
end
local p_null = { } setmetatable(p_null, mt_z)
local p_true = { } setmetatable(p_true, mt_t)
local p_false = { } setmetatable(p_false,mt_f)
local function pdfnull()
return p_null
end
--~ print(pdfboolean(false),pdfboolean(false,false),pdfboolean(false,true))
--~ print(pdfboolean(true),pdfboolean(true,false),pdfboolean(true,true))
--~ print(pdfboolean(nil,true),pdfboolean(nil,false))
local function pdfboolean(b,default)
if type(b) == "boolean" then
return b and p_true or p_false
else
return default and p_true or p_false
end
end
local function pdfreference(r)
return setmetatable({ r or 0 },mt_r)
end
local function pdfverbose(t) -- maybe check for type
return setmetatable({ t or "" },mt_v)
end
lpdf.stream = pdfstream -- THIS WILL PROBABLY CHANGE
lpdf.dictionary = pdfdictionary
lpdf.array = pdfarray
lpdf.string = pdfstring
lpdf.unicode = pdfunicode
lpdf.number = pdfnumber
lpdf.constant = pdfconstant
lpdf.null = pdfnull
lpdf.boolean = pdfboolean
lpdf.reference = pdfreference
lpdf.verbose = pdfverbose
-- n = pdf.obj(n, str)
-- n = pdf.obj(n, "file", filename)
-- n = pdf.obj(n, "stream", streamtext, attrtext)
-- n = pdf.obj(n, "streamfile", filename, attrtext)
-- we only use immediate objects
-- todo: tracing
local names, cache = { }, { }
function lpdf.reserveobject(name)
if name == "annot" then
-- catch misuse
return pdfreserveobject("annot")
else
local r = pdfreserveobject()
if name then
names[name] = r
if trace_objects then
report_objects("reserving number %a under name %a",r,name)
end
elseif trace_objects then
report_objects("reserving number %a",r)
end
return r
end
end
function lpdf.reserveannotation()
return pdfreserveobject("annot")
end
-- lpdf.immediateobject = pdfimmediateobject
-- lpdf.deferredobject = pdfdeferredobject
-- lpdf.object = pdfdeferredobject
-- lpdf.referenceobject = pdfreferenceobject
lpdf.pagereference = pdf.pageref or tex.pdfpageref
lpdf.registerannotation = pdf.registerannot
function lpdf.delayedobject(data) -- we will get rid of this one
local n = pdfdeferredobject(data)
pdfreferenceobject(n)
return n
end
function lpdf.flushobject(name,data)
if data then
local named = names[name]
if named then
if not trace_objects then
elseif trace_detail then
report_objects("flushing data to reserved object with name %a, data: %S",name,data)
else
report_objects("flushing data to reserved object with name %a",name)
end
return pdfimmediateobject(named,tostring(data))
else
if not trace_objects then
elseif trace_detail then
report_objects("flushing data to reserved object with number %s, data: %S",name,data)
else
report_objects("flushing data to reserved object with number %s",name)
end
return pdfimmediateobject(name,tostring(data))
end
else
if trace_objects and trace_detail then
report_objects("flushing data: %S",name)
end
return pdfimmediateobject(tostring(name))
end
end
function lpdf.flushstreamobject(data,dict,compressed) -- default compressed
if trace_objects then
report_objects("flushing stream object of %s bytes",#data)
end
local dtype = type(dict)
return pdfdeferredobject {
immediate = true,
compresslevel = compressed == false and 0 or nil,
type = "stream",
string = data,
attr = (dtype == "string" and dict) or (dtype == "table" and dict()) or nil,
}
end
function lpdf.flushstreamfileobject(filename,dict,compressed) -- default compressed
if trace_objects then
report_objects("flushing stream file object %a",filename)
end
local dtype = type(dict)
return pdfdeferredobject {
immediate = true,
compresslevel = compressed == false and 0 or nil,
type = "stream",
file = filename,
attr = (dtype == "string" and dict) or (dtype == "table" and dict()) or nil,
}
end
local shareobjectcache, shareobjectreferencecache = { }, { }
function lpdf.shareobject(content)
content = tostring(content)
local o = shareobjectcache[content]
if not o then
o = pdfimmediateobject(content)
shareobjectcache[content] = o
end
return o
end
function lpdf.shareobjectreference(content)
content = tostring(content)
local r = shareobjectreferencecache[content]
if not r then
local o = shareobjectcache[content]
if not o then
o = pdfimmediateobject(content)
shareobjectcache[content] = o
end
r = pdfreference(o)
shareobjectreferencecache[content] = r
end
return r
end
--~ local d = lpdf.dictionary()
--~ local e = lpdf.dictionary { ["e"] = "abc", x = lpdf.dictionary { ["f"] = "ABC" } }
--~ local f = lpdf.dictionary { ["f"] = "ABC" }
--~ local a = lpdf.array { lpdf.array { lpdf.string("xxx") } }
--~ print(a)
--~ os.exit()
--~ d["test"] = lpdf.string ("test")
--~ d["more"] = "more"
--~ d["bool"] = true
--~ d["numb"] = 1234
--~ d["oeps"] = lpdf.dictionary { ["hans"] = "ton" }
--~ d["whow"] = lpdf.array { lpdf.string("ton") }
--~ a[#a+1] = lpdf.string("xxx")
--~ a[#a+1] = lpdf.string("yyy")
--~ d.what = a
--~ print(e)
--~ local d = lpdf.dictionary()
--~ d["abcd"] = { 1, 2, 3, "test" }
--~ print(d)
--~ print(d())
--~ local d = lpdf.array()
--~ d[#d+1] = 1
--~ d[#d+1] = 2
--~ d[#d+1] = 3
--~ d[#d+1] = "test"
--~ print(d)
--~ local d = lpdf.array()
--~ d[#d+1] = { 1, 2, 3, "test" }
--~ print(d)
--~ local d = lpdf.array()
--~ d[#d+1] = { a=1, b=2, c=3, d="test" }
--~ print(d)
--~ local s = lpdf.constant("xx")
--~ print(s) -- fails somehow
--~ print(s()) -- fails somehow
--~ local s = lpdf.boolean(false)
--~ s.value = true
--~ print(s)
--~ print(s())
-- three priority levels, default=2
local pagefinalizers, documentfinalizers = { { }, { }, { } }, { { }, { }, { } }
local pageresources, pageattributes, pagesattributes
local function resetpageproperties()
pageresources = pdfdictionary()
pageattributes = pdfdictionary()
pagesattributes = pdfdictionary()
end
resetpageproperties()
local function setpageproperties()
pdf.pageresources = pageresources ()
pdf.pageattributes = pageattributes ()
pdf.pagesattributes = pagesattributes()
end
local function addtopageresources (k,v) pageresources [k] = v end
local function addtopageattributes (k,v) pageattributes [k] = v end
local function addtopagesattributes(k,v) pagesattributes[k] = v end
lpdf.addtopageresources = addtopageresources
lpdf.addtopageattributes = addtopageattributes
lpdf.addtopagesattributes = addtopagesattributes
local function set(where,what,f,when,comment)
if type(when) == "string" then
when, comment = 2, when
elseif not when then
when = 2
end
local w = where[when]
w[#w+1] = { f, comment }
if trace_finalizers then
report_finalizing("%s set: [%s,%s]",what,when,#w)
end
end
local function run(where,what)
if trace_finalizers then
report_finalizing("start backend, category %a, n %a",what,#where)
end
for i=1,#where do
local w = where[i]
for j=1,#w do
local wj = w[j]
if trace_finalizers then
report_finalizing("%s finalizer: [%s,%s] %s",what,i,j,wj[2] or "")
end
wj[1]()
end
end
if trace_finalizers then
report_finalizing("stop finalizing")
end
end
local function registerpagefinalizer(f,when,comment)
set(pagefinalizers,"page",f,when,comment)
end
local function registerdocumentfinalizer(f,when,comment)
set(documentfinalizers,"document",f,when,comment)
end
lpdf.registerpagefinalizer = registerpagefinalizer
lpdf.registerdocumentfinalizer = registerdocumentfinalizer
function lpdf.finalizepage()
if not environment.initex then
-- resetpageproperties() -- maybe better before
run(pagefinalizers,"page")
setpageproperties()
resetpageproperties() -- maybe better before
end
end
function lpdf.finalizedocument()
if not environment.initex then
run(documentfinalizers,"document")
function lpdf.finalizedocument()
report_finalizing("serious error: the document is finalized multiple times")
function lpdf.finalizedocument() end
end
end
end
backends.pdf.codeinjections.finalizepage = lpdf.finalizepage -- will go when we have hook
--~ callbacks.register("finish_pdfpage", lpdf.finalizepage)
callbacks.register("finish_pdffile", lpdf.finalizedocument)
-- some minimal tracing, handy for checking the order
local function trace_set(what,key)
if trace_resources then
report_finalizing("setting key %a in %a",key,what)
end
end
local function trace_flush(what)
if trace_resources then
report_finalizing("flushing %a",what)
end
end
lpdf.protectresources = true
local catalog = pdfdictionary { Type = pdfconstant("Catalog") } -- nicer, but when we assign we nil the Type
local info = pdfdictionary { Type = pdfconstant("Info") } -- nicer, but when we assign we nil the Type
local names = pdfdictionary { Type = pdfconstant("Names") } -- nicer, but when we assign we nil the Type
local function flushcatalog() if not environment.initex then trace_flush("catalog") catalog.Type = nil pdf.catalog = catalog() end end
local function flushinfo () if not environment.initex then trace_flush("info") info .Type = nil pdf.info = info () end end
local function flushnames () if not environment.initex then trace_flush("names") names .Type = nil pdf.names = names () end end
function lpdf.addtocatalog(k,v) if not (lpdf.protectresources and catalog[k]) then trace_set("catalog",k) catalog[k] = v end end
function lpdf.addtoinfo (k,v) if not (lpdf.protectresources and info [k]) then trace_set("info", k) info [k] = v end end
function lpdf.addtonames (k,v) if not (lpdf.protectresources and names [k]) then trace_set("names", k) names [k] = v end end
local dummy = pdfreserveobject() -- else bug in hvmd due so some internal luatex conflict
-- Some day I will implement a proper minimalized resource management.
local r_extgstates, d_extgstates = pdfreserveobject(), pdfdictionary() local p_extgstates = pdfreference(r_extgstates)
local r_colorspaces, d_colorspaces = pdfreserveobject(), pdfdictionary() local p_colorspaces = pdfreference(r_colorspaces)
local r_patterns, d_patterns = pdfreserveobject(), pdfdictionary() local p_patterns = pdfreference(r_patterns)
local r_shades, d_shades = pdfreserveobject(), pdfdictionary() local p_shades = pdfreference(r_shades)
local function checkextgstates () if next(d_extgstates ) then addtopageresources("ExtGState", p_extgstates ) end end
local function checkcolorspaces() if next(d_colorspaces) then addtopageresources("ColorSpace",p_colorspaces) end end
local function checkpatterns () if next(d_patterns ) then addtopageresources("Pattern", p_patterns ) end end
local function checkshades () if next(d_shades ) then addtopageresources("Shading", p_shades ) end end
local function flushextgstates () if next(d_extgstates ) then trace_flush("extgstates") pdfimmediateobject(r_extgstates, tostring(d_extgstates )) end end
local function flushcolorspaces() if next(d_colorspaces) then trace_flush("colorspaces") pdfimmediateobject(r_colorspaces,tostring(d_colorspaces)) end end
local function flushpatterns () if next(d_patterns ) then trace_flush("patterns") pdfimmediateobject(r_patterns, tostring(d_patterns )) end end
local function flushshades () if next(d_shades ) then trace_flush("shades") pdfimmediateobject(r_shades, tostring(d_shades )) end end
function lpdf.collectedresources()
local ExtGState = next(d_extgstates ) and p_extgstates
local ColorSpace = next(d_colorspaces) and p_colorspaces
local Pattern = next(d_patterns ) and p_patterns
local Shading = next(d_shades ) and p_shades
if ExtGState or ColorSpace or Pattern or Shading then
local collected = pdfdictionary {
ExtGState = ExtGState,
ColorSpace = ColorSpace,
Pattern = Pattern,
Shading = Shading,
-- ProcSet = pdfarray { pdfconstant("PDF") },
}
return collected()
else
return ""
end
end
function lpdf.adddocumentextgstate (k,v) d_extgstates [k] = v end
function lpdf.adddocumentcolorspace(k,v) d_colorspaces[k] = v end
function lpdf.adddocumentpattern (k,v) d_patterns [k] = v end
function lpdf.adddocumentshade (k,v) d_shades [k] = v end
registerdocumentfinalizer(flushextgstates,3,"extended graphic states")
registerdocumentfinalizer(flushcolorspaces,3,"color spaces")
registerdocumentfinalizer(flushpatterns,3,"patterns")
registerdocumentfinalizer(flushshades,3,"shades")
registerdocumentfinalizer(flushcatalog,3,"catalog")
registerdocumentfinalizer(flushinfo,3,"info")
registerdocumentfinalizer(flushnames,3,"names") -- before catalog
registerpagefinalizer(checkextgstates,3,"extended graphic states")
registerpagefinalizer(checkcolorspaces,3,"color spaces")
registerpagefinalizer(checkpatterns,3,"patterns")
registerpagefinalizer(checkshades,3,"shades")
-- in strc-bkm: lpdf.registerdocumentfinalizer(function() structures.bookmarks.place() end,1)
function lpdf.rotationcm(a)
local s, c = sind(a), cosd(a)
return format("%0.6f %0.6f %0.6f %0.6f 0 0 cm",c,s,-s,c)
end
-- ! -> universaltime
local timestamp = os.date("%Y-%m-%dT%X") .. os.timezone(true)
function lpdf.timestamp()
return timestamp
end
function lpdf.pdftimestamp(str)
local Y, M, D, h, m, s, Zs, Zh, Zm = match(str,"^(%d%d%d%d)%-(%d%d)%-(%d%d)T(%d%d):(%d%d):(%d%d)([%+%-])(%d%d):(%d%d)$")
return Y and format("D:%s%s%s%s%s%s%s%s'%s'",Y,M,D,h,m,s,Zs,Zh,Zm)
end
function lpdf.id()
return format("%s.%s",tex.jobname,timestamp)
end
function lpdf.checkedkey(t,key,variant)
local pn = t and t[key]
if pn then
local tn = type(pn)
if tn == variant then
if variant == "string" then
return pn ~= "" and pn or nil
elseif variant == "table" then
return next(pn) and pn or nil
else
return pn
end
elseif tn == "string" and variant == "number" then
return tonumber(pn)
end
end
end
function lpdf.checkedvalue(value,variant) -- code not shared
if value then
local tv = type(value)
if tv == variant then
if variant == "string" then
return value ~= "" and value
elseif variant == "table" then
return next(value) and value
else
return value
end
elseif tv == "string" and variant == "number" then
return tonumber(value)
end
end
end
function lpdf.limited(n,min,max,default)
if not n then
return default
else
n = tonumber(n)
if not n then
return default
elseif n > max then
return max
elseif n < min then
return min
else
return n
end
end
end
-- lpdf.addtoinfo("ConTeXt.Version", tex.contextversiontoks)
-- lpdf.addtoinfo("ConTeXt.Time", os.date("%Y.%m.%d %H:%M")) -- :%S
-- lpdf.addtoinfo("ConTeXt.Jobname", environment.jobname)
-- lpdf.addtoinfo("ConTeXt.Url", "www.pragma-ade.com")
if not pdfreferenceobject then
local delayed = { }
local function flush()
local n = 0
for k,v in next, delayed do
pdfimmediateobject(k,v)
n = n + 1
end
if trace_objects then
report_objects("%s objects flushed",n)
end
delayed = { }
end
lpdf.registerdocumentfinalizer(flush,3,"objects") -- so we need a final flush too
lpdf.registerpagefinalizer (flush,3,"objects") -- somehow this lags behind .. I need to look into that some day
function lpdf.delayedobject(data)
local n = pdfreserveobject()
delayed[n] = data
return n
end
end
|