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
|
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 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 = lpeg.match
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.new("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 labels = allocate()
local stack = { }
local chain = { }
local ids = { }
local enabled = false
local tags = structures.tags
tags.taglist = taglist -- can best be hidden
tags.labels = labels
local properties = allocate {
document = { pdf = "Div", nature = "display" },
division = { pdf = "Div", nature = "display" },
paragraph = { pdf = "P", nature = "mixed" },
construct = { 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" },
verbatimline = { pdf = "Code", nature = "display" },
verbatim = { pdf = "Code", nature = "inline" },
register = { pdf = "Div", nature = "display" },
registersection = { pdf = "Div", nature = "display" },
registertag = { pdf = "Span", nature = "mixed" },
registerentries = { pdf = "Div", nature = "display" },
registerentry = { pdf = "Span", nature = "mixed" },
registersee = { pdf = "Span", nature = "mixed" },
registerpages = { pdf = "Span", nature = "mixed" },
registerpage = { 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" },
float = { pdf = "Div", nature = "display" }, -- Figure
floatcaption = { pdf = "Caption", nature = "display" },
floattag = { pdf = "Span", nature = "mixed" },
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
formulatag = { 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 = "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" },
}
tags.properties = properties
function tags.settagproperty(tag,key,value)
local p = properties[tag]
if p then
p[key] = value
else
properties[tag] = { [key] = value }
end
end
local lasttags = { }
local userdata = { }
tags.userdata = userdata
function tags.start(tag,specification)
local label, detail, user
if specification then
label, detail, user = specification.label, specification.detail, specification.userdata
end
if not enabled then
codeinjections.enabletags()
enabled = true
end
labels[tag] = label ~= "" and label or tag
local fulltag
if detail and detail ~= "" then
fulltag = tag .. ":" .. detail
else
fulltag = tag
end
local t = #taglist + 1
local n = (ids[fulltag] or 0) + 1
ids[fulltag] = n
lasttags[tag] = n
--~ print("SETTING",tag,n)
local completetag = fulltag .. "-" .. n
chain[#chain+1] = completetag -- insert(chain,tag .. ":" .. n)
stack[#stack+1] = t -- insert(stack,t)
taglist[t] = { unpack(chain) } -- we can add key values for alt and actualtext if needed
if user and user ~= "" then
-- maybe we should merge this into taglistor or whatever ... anyway there is room to optimize
-- taglist.userdata = settings_to_hash(user)
userdata[completetag] = settings_to_hash(user)
end
texattribute[a_tagged] = t
return t
end
function tags.stop()
local t = stack[#stack] stack[#stack] = nil -- local t = remove(stack)
if not t then
if trace_tags then
report_tags("ignoring end tag, previous chain: %s",#chain > 0 and concat(chain[#chain]) or "none")
end
t = unsetvalue
else
chain[#chain] = nil -- remove(chain)
end
texattribute[a_tagged] = t
return t
end
function tags.last(tag)
return lasttags[tag] -- or false
end
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
return format("%s element chains identified",#taglist)
else
return nil
end
end)
directives.register("backend.addtags", function(v)
if not enabled then
codeinjections.enabletags()
enabled = true
end
end)
|
