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
|
if not modules then modules = { } end modules ['strc-tag'] = {
version = 1.001,
comment = "companion to strc-tag.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This is rather experimental code.
local type = type
local insert, remove, unpack, concat = table.insert, table.remove, table.unpack, table.concat
local gsub, find, topattern, format = string.gsub, string.find, string.topattern, string.format
local lpegmatch, P, S, C = lpeg.match, lpeg.P, lpeg.S, lpeg.C
local texattribute = tex.attribute
local allocate = utilities.storage.allocate
local settings_to_hash = utilities.parsers.settings_to_hash
local trace_tags = false trackers.register("structures.tags", function(v) trace_tags = v end)
local report_tags = logs.reporter("structure","tags")
local attributes, structures = attributes, structures
local a_tagged = attributes.private('tagged')
local unsetvalue = attributes.unsetvalue
local codeinjections = backends.codeinjections
local taglist = allocate()
local properties = allocate()
local userproperties = allocate()
local labels = allocate()
local stack = { }
local chain = { }
local ids = { }
local enabled = false
local tagdata = { } -- used in export
local tagmetadata = { } -- used in export
local tagcontext = { }
local tags = structures.tags
tags.taglist = taglist -- can best be hidden
tags.labels = labels
tags.data = tagdata
tags.metadata = tagmetadata
tags.userproperties = userproperties -- used in backend
local properties = allocate {
document = { pdf = "Div", nature = "display" },
division = { pdf = "Div", nature = "display" },
paragraph = { pdf = "P", nature = "mixed" },
p = { pdf = "P", nature = "mixed" },
construct = { pdf = "Span", nature = "inline" },
highlight = { pdf = "Span", nature = "inline" },
section = { pdf = "Sect", nature = "display" },
sectiontitle = { pdf = "H", nature = "mixed" },
sectionnumber = { pdf = "H", nature = "mixed" },
sectioncontent = { pdf = "Div", nature = "display" },
itemgroup = { pdf = "L", nature = "display" },
item = { pdf = "LI", nature = "display" },
itemtag = { pdf = "Lbl", nature = "mixed" },
itemcontent = { pdf = "LBody", nature = "mixed" },
description = { pdf = "Div", nature = "display" },
descriptiontag = { pdf = "Div", nature = "mixed" },
descriptioncontent = { pdf = "Div", nature = "mixed" },
descriptionsymbol = { pdf = "Span", nature = "inline" }, -- note reference
verbatimblock = { pdf = "Code", nature = "display" },
verbatimlines = { pdf = "Code", nature = "display" },
verbatimline = { pdf = "Code", nature = "mixed" },
verbatim = { pdf = "Code", nature = "inline" },
lines = { pdf = "Code", nature = "display" },
line = { pdf = "Code", nature = "mixed" },
synonym = { pdf = "Span", nature = "inline" },
sorting = { pdf = "Span", nature = "inline" },
register = { pdf = "Div", nature = "display" },
registerlocation = { pdf = "Span", nature = "inline" },
registersection = { pdf = "Div", nature = "display" },
registertag = { pdf = "Span", nature = "mixed" },
registerentries = { pdf = "Div", nature = "display" },
registerentry = { pdf = "Div", nature = "display" },
registercontent = { pdf = "Span", nature = "mixed" },
registersee = { pdf = "Span", nature = "mixed" },
registerpages = { pdf = "Span", nature = "mixed" },
registerpage = { pdf = "Span", nature = "mixed" },
registerseparator = { pdf = "Span", nature = "inline" },
registerpagerange = { pdf = "Span", nature = "mixed" },
table = { pdf = "Table", nature = "display" },
tablerow = { pdf = "TR", nature = "display" },
tablecell = { pdf = "TD", nature = "mixed" },
tabulate = { pdf = "Table", nature = "display" },
tabulaterow = { pdf = "TR", nature = "display" },
tabulatecell = { pdf = "TD", nature = "mixed" },
list = { pdf = "TOC", nature = "display" },
listitem = { pdf = "TOCI", nature = "display" },
listtag = { pdf = "Lbl", nature = "mixed" },
listcontent = { pdf = "P", nature = "mixed" },
listdata = { pdf = "P", nature = "mixed" },
listpage = { pdf = "Reference", nature = "mixed" },
delimitedblock = { pdf = "BlockQuote", nature = "display" },
delimited = { pdf = "Quote", nature = "inline" },
subsentence = { pdf = "Span", nature = "inline" },
label = { pdf = "Span", nature = "mixed" },
number = { pdf = "Span", nature = "mixed" },
float = { pdf = "Div", nature = "display" }, -- Figure
floatcaption = { pdf = "Caption", nature = "mixed" },
floatlabel = { pdf = "Span", nature = "inline" },
floatnumber = { pdf = "Span", nature = "inline" },
floattext = { pdf = "Span", nature = "mixed" },
floatcontent = { pdf = "P", nature = "mixed" },
image = { pdf = "P", nature = "mixed" },
mpgraphic = { pdf = "P", nature = "mixed" },
formulaset = { pdf = "Div", nature = "display" },
formula = { pdf = "Div", nature = "display" }, -- Formula
formulacaption = { pdf = "Span", nature = "mixed" },
formulalabel = { pdf = "Span", nature = "mixed" },
formulanumber = { pdf = "Span", nature = "mixed" },
formulacontent = { pdf = "P", nature = "display" },
subformula = { pdf = "Div", nature = "display" },
link = { pdf = "Link", nature = "inline" },
margintextblock = { pdf = "Span", nature = "inline" },
margintext = { pdf = "Span", nature = "inline" },
math = { pdf = "Div", nature = "inline" }, -- no display
mn = { pdf = "Span", nature = "mixed" },
mi = { pdf = "Span", nature = "mixed" },
mo = { pdf = "Span", nature = "mixed" },
ms = { pdf = "Span", nature = "mixed" },
mrow = { pdf = "Span", nature = "display" },
msubsup = { pdf = "Span", nature = "display" },
msub = { pdf = "Span", nature = "display" },
msup = { pdf = "Span", nature = "display" },
merror = { pdf = "Span", nature = "mixed" },
munderover = { pdf = "Span", nature = "display" },
munder = { pdf = "Span", nature = "display" },
mover = { pdf = "Span", nature = "display" },
mtext = { pdf = "Span", nature = "mixed" },
mfrac = { pdf = "Span", nature = "display" },
mroot = { pdf = "Span", nature = "display" },
msqrt = { pdf = "Span", nature = "display" },
mfenced = { pdf = "Span", nature = "display" },
maction = { pdf = "Span", nature = "display" },
mstacker = { pdf = "Span", nature = "display" }, -- these are only internally used
mstackertop = { pdf = "Span", nature = "display" }, -- these are only internally used
mstackerbot = { pdf = "Span", nature = "display" }, -- these are only internally used
mstackermid = { pdf = "Span", nature = "display" }, -- these are only internally used
mtable = { pdf = "Table", nature = "display" }, -- might change
mtr = { pdf = "TR", nature = "display" }, -- might change
mtd = { pdf = "TD", nature = "display" }, -- might change
ignore = { pdf = "Span", nature = "mixed" },
metadata = { pdf = "Div", nature = "display" },
metavariable = { pdf = "Span", nature = "mixed" },
mid = { pdf = "Span", nature = "inline" },
sub = { pdf = "Span", nature = "inline" },
sup = { pdf = "Span", nature = "inline" },
subsup = { pdf = "Span", nature = "inline" },
combination = { pdf = "Span", nature = "display" },
combinationpair = { pdf = "Span", nature = "display" },
combinationcontent = { pdf = "Span", nature = "mixed" },
combinationcaption = { pdf = "Span", nature = "mixed" },
}
function tags.detailedtag(tag,detail,attribute)
if not attribute then
attribute = texattribute[a_tagged]
end
if attribute >= 0 then
local tl = taglist[attribute]
if tl then
local pattern
if detail and detail ~= "" then
pattern = "^" .. tag .. ":".. detail .. "%-"
else
pattern = "^" .. tag .. "%-"
end
for i=#tl,1,-1 do
local tli = tl[i]
if find(tli,pattern) then
return tli
end
end
end
else
-- enabled but not auto
end
return false -- handy as bogus index
end
tags.properties = properties
local lasttags = { }
local userdata = { }
tags.userdata = userdata
function tags.setproperty(tag,key,value)
local p = properties[tag]
if p then
p[key] = value
else
properties[tag] = { [key] = value }
end
end
function tags.registerdata(data)
local fulltag = chain[nstack]
if fulltag then
tagdata[fulltag] = data
end
end
local metadata
function tags.registermetadata(data)
local d = settings_to_hash(data)
if metadata then
table.merge(metadata,d)
else
metadata = d
end
end
local nstack = 0
function tags.start(tag,specification,props)
local label, detail, user
if specification then
label = specification.label
detail = specification.detail
user = specification.userdata
end
if not enabled then
codeinjections.enabletags()
enabled = true
end
--
local fulltag = label ~= "" and label or tag
labels[tag] = fulltag
if detail and detail ~= "" then
fulltag = fulltag .. ":" .. detail
end
--
local t = #taglist + 1
local n = (ids[fulltag] or 0) + 1
ids[fulltag] = n
lasttags[tag] = n
local completetag = fulltag .. "-" .. n
nstack = nstack + 1
chain[nstack] = completetag
stack[nstack] = t
--
tagcontext[tag] = completetag
--
-- a copy as we can add key values for alt and actualtext if needed:
taglist[t] = { unpack(chain,1,nstack) }
--
if user and user ~= "" then
-- maybe we should merge this into taglist or whatever ... anyway there is room to optimize
-- taglist.userdata = settings_to_hash(user)
userdata[completetag] = settings_to_hash(user)
end
if metadata then
tagmetadata[completetag] = metadata
metadata = nil
end
if props then
properties[completetag] = props
end
texattribute[a_tagged] = t
return t
end
function tags.restart(completetag)
local t = #taglist + 1
nstack = nstack + 1
chain[nstack] = completetag
stack[nstack] = t
taglist[t] = { unpack(chain,1,nstack) }
texattribute[a_tagged] = t
return t
end
function tags.stop()
if nstack > 0 then
nstack = nstack -1
end
local t = stack[nstack]
if not t then
-- if trace_tags then
report_tags("ignoring end tag, previous chain: %s",nstack > 0 and concat(chain[nstack],"",1,nstack) or "none")
-- end
t = unsetvalue
end
texattribute[a_tagged] = t
return t
end
function tags.getid(tag,detail)
if detail and detail ~= "" then
return ids[tag .. ":" .. detail] or "?"
else
return ids[tag] or "?"
end
end
function tags.last(tag)
return lasttags[tag] -- or false
end
function tags.lastinchain(tag)
if tag and tag ~= "" then
return tagcontext[tag]
else
return chain[nstack]
end
end
local strip = C((1-S(":-"))^1)
commands.getelementtag = function()
local fulltag = chain[nstack]
if fulltag then
context(lpegmatch(strip,fulltag))
end
end
function tags.setuserproperties(tag,list)
if list then
tag = tagcontext[tag]
else
tag, list = chain[nstack], tag
end
if tag then
local l = settings_to_hash(list)
local p = userproperties[tag]
if p then
for k, v in next, l do
p[k] = v
end
else
userproperties[tag] = l
end
end
end
commands.setelementuserproperties = tags.setuserproperties
function structures.atlocation(str)
local location = gsub(concat(taglist[texattribute[a_tagged]],"-"),"%-%d+","")
return find(location,topattern(str)) ~= nil
end
function tags.handler(head) -- we need a dummy
return head, false
end
statistics.register("structure elements", function()
if enabled then
if nstack > 0 then
return format("%s element chains identified, open chain: %s ",#taglist,concat(chain," => ",1,nstack))
else
return format("%s element chains identified",#taglist)
end
end
end)
directives.register("backend.addtags", function(v)
if not enabled then
codeinjections.enabletags()
enabled = true
end
end)
commands.starttag = tags.start
commands.stoptag = tags.stop
commands.settagproperty = tags.setproperty
|
