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
|
if not modules then modules = { } end modules ['typo-chr'] = {
version = 1.001,
comment = "companion to typo-bld.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- A historic intermediate version can be found in the mkiv variant. The code
-- can probably be improved but performance etc is not really an issue here.
local insert, remove = table.insert, table.remove
local context = context
local ctx_doifelse = commands.doifelse
local nodecodes = nodes.nodecodes
local boundarycodes = nodes.boundarycodes
local subtypes = nodes.subtypes
local glyph_code = nodecodes.glyph
local par_code = nodecodes.par
local boundary_code = nodecodes.boundary
local wordboundary_code = boundarycodes.word
local texgetnest = tex.getnest -- to be used
local texsetcount = tex.setcount
local flushnode = nodes.flushnode
local flushlist = nodes.flushlist
local settexattribute = tex.setattribute
local punctuation = characters.is_punctuation
local variables = interfaces.variables
local v_all = variables.all
local v_reset = variables.reset
local stack = { }
local a_marked = attributes.numbers['marked']
local lastmarked = 0
local marked = {
[v_all] = 1,
[""] = 1,
[v_reset] = attributes.unsetvalue,
}
local function pickup()
local list = texgetnest()
if list then
local tail = list.tail
if tail and tail.id == glyph_code and punctuation[tail.char] then
local prev = tail.prev
list.tail = prev
if prev then
prev.next = nil
end
list.tail = prev
tail.prev = nil
return tail
end
end
end
local actions = {
remove = function(specification)
local n = pickup()
if n then
flushnode(n)
end
end,
push = function(specification)
local n = pickup()
if n then
insert(stack,n or false)
end
end,
pop = function(specification)
local n = remove(stack)
if n then
context(n)
end
end,
}
local function pickuppunctuation(specification)
local action = actions[specification.action or "remove"]
if action then
action(specification)
end
end
-- I played with nested marked content but it makes no sense and gives
-- complex code. Also, it's never needed so why bother.
local function pickup(head,tail,str)
local attr = marked[str]
local last = tail
if last[a_marked] == attr then
local first = last
while true do
local prev = first.prev
if prev and prev[a_marked] == attr then
if prev.id == par_code then -- and startofpar(prev)
break
else
first = prev
end
else
break
end
end
return first, last
end
end
local function found(str)
local list = texgetnest()
if list then
local tail = list.tail
return tail and tail[a_marked] == marked[str]
end
end
local actions = {
remove = function(specification)
local list = texgetnest()
if list then
local head = list.head
local tail = list.tail
local first, last = pickup(head,tail,specification.mark)
if first then
if first == head then
list.head = nil
list.tail = nil
else
local prev = first.prev
list.tail = prev
prev.next = nil
end
flushlist(first)
end
end
end,
}
local function pickupmarkedcontent(specification)
local action = actions[specification.action or "remove"]
if action then
action(specification)
end
end
local function markcontent(str)
local currentmarked = marked[str or v_all]
if not currentmarked then
lastmarked = lastmarked + 1
currentmarked = lastmarked
marked[str] = currentmarked
end
settexattribute(a_marked,currentmarked)
end
interfaces.implement {
name = "pickuppunctuation",
actions = pickuppunctuation,
arguments = {
{
{ "action" }
}
}
}
interfaces.implement {
name = "pickupmarkedcontent",
actions = pickupmarkedcontent,
arguments = {
{
{ "action" },
{ "mark" }
}
}
}
interfaces.implement {
name = "markcontent",
actions = markcontent,
arguments = "string",
}
interfaces.implement {
name = "doifelsemarkedcontent",
actions = function(str) ctx_doifelse(found(str)) end,
arguments = "string",
}
-- We just put these here.
interfaces.implement {
name = "lastnodeidstring",
public = true,
actions = function()
local list = texgetnest() -- "top"
local okay = false
if list then
local tail = list.tail
if tail then
okay = nodecodes[tail.id]
end
end
context(okay or "")
end,
}
-- local t_lastnodeid = token.create("c_syst_last_node_id")
--
-- interfaces.implement {
-- name = "lastnodeid",
-- public = true,
-- actions = function()
-- ...
-- tex.setcount("c_syst_last_node_id",okay)
-- context.sprint(t_lastnodeid)
-- end,
-- }
-- not needed in lmtx ...
interfaces.implement {
name = "lastnodeid",
actions = function()
local list = texgetnest() -- "top"
local okay = -1
if list then
local tail = list.tail
if tail then
okay = tail.id
end
end
texsetcount("c_syst_last_node_id",okay)
end,
}
interfaces.implement {
name = "lastnodesubtypestring",
public = true,
actions = function()
local list = texgetnest() -- "top"
local okay = false
if list then
local tail = list.tail
if head then
okay = subtypes[tail.id][tail.subtype]
end
end
context(okay or "")
end,
}
local function lastnodeequals(id,subtype)
local list = texgetnest() -- "top"
local okay = false
if list then
local tail = list.tail
if tail then
local i = tail.id
okay = i == id or i == nodecodes[id]
if subtype then
local s = tail.subtype
okay = s == subtype or s == subtypes[i][subtype]
end
end
end
ctx_doifelse(okay)
end
interfaces.implement {
name = "lastnodeequals",
arguments = "2 strings",
actions = lastnodeequals,
}
interfaces.implement {
name = "atwordboundary",
actions = function()
lastnodeequals(boundary_code,wordboundary_code)
end,
}
|