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
|
if not modules then modules = { } end modules ['typo-ovl'] = {
version = 1.001,
comment = "companion to typo-ovl.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This is dubious code. If you needed it your source is probably bad. We only used
-- in when we had to mark bad content but when cleaning up some project code I decided
-- that it is easier to maintain in the distribution then in a project style. After all,
-- we have hardly any private code. For convenience I hooked it into the existing
-- replacement module (as it used the same code anyway). I did some cleanup.
local next, type = next, type
local context = context
local nuts = nodes.nuts
local tonut = nodes.tonut
local tonode = nodes.tonode
local nodecodes = nodes.nodecodes
local glyph_code = nodecodes.glyph
local disc_code = nodecodes.disc
local getnext = nuts.getnext
local getid = nuts.getid
local getdisc = nuts.getdisc
local getattr = nuts.getattr
local setattr = nuts.setattr
local getattrlist = nuts.getattrlist
local setattrlist = nuts.setattrlist
local getfield = nuts.getfield
local setfont = nuts.setfont
local unsetvalue = attributes.unsetvalue
local prvattribute = attributes.private
local texgetbox = tex.getbox
local currentfont = font.current
local a_overloads = attributes.private("overloads")
local n_overloads = 0
local t_overloads = { }
local overloaded = { }
local function markasoverload(a)
local n = prvattribute(a)
if n then
overloaded[n] = a
end
end
attributes.markasoverload = markasoverload
markasoverload("color")
markasoverload("colormodel")
markasoverload("transparency")
markasoverload("case")
markasoverload("negative")
markasoverload("effect")
markasoverload("ruled")
markasoverload("shifted")
markasoverload("kernchars")
markasoverload("kern")
markasoverload("noligature")
markasoverload("viewerlayer")
local function tooverloads(n)
local current = tonut(n)
local a = getattrlist(current)
local s = { }
while a do
local n = getfield(a,"number")
local o = overloaded[n]
if o then
local v = getfield(a,"value")
if v ~= unsetvalue then
s[n] = v
-- print(o,n,v)
end
end
a = getnext(a)
end
return s
end
attributes.tooverloads = tooverloads
function attributes.applyoverloads(specification,start,stop)
local current = tonut(start)
local processor = specification.processor
local overloads = specification.processor or getattr(current,a_overloads)
if overloads and overloads ~= unsetvalue then
overloads = t_overloads[overloads]
if not overloads then
return
end
else
return
end
local last = stop and tonut(stop)
local oldlist = nil
local newlist = nil
local newfont = overloads.font
local function apply()
local a = getattrlist(current)
if a == oldlist then
setattrlist(current,newlist)
else
oldlist = getattrlist(current)
for k, v in next, overloads do
if type(v) == "number" then
setattr(current,k,v)
else
-- can be: ["font"] = number
end
end
newlist = current -- getattrlist(current)
end
if newfont then
setfont(current,newfont)
end
end
while current do
local id = getid(current)
if id == glyph_code then
apply()
elseif id == disc_code then
apply()
if pre then
while pre do
if getid(pre) == glyph_code then
apply()
end
pre = getnext(pre)
end
end
if post then
while post do
if getid(post) == glyph_code then
apply()
end
post = getnext(post)
end
end
if replace then
while replace do
if getid(replace) == glyph_code then
apply()
end
replace = getnext(replace)
end
end
end
if current == last then
break
end
current = getnext(current)
end
end
-- we assume the same highlight so we're global
interfaces.implement {
name = "overloadsattribute",
arguments = { "string", "integer", "integer" },
actions = function(name,font,box)
local samplebox = texgetbox(box)
local sample = samplebox and samplebox.list
local overloads = sample and tooverloads(sample)
if overloads then
overloads.font = font > 0 and font or false
n_overloads = n_overloads + 1
t_overloads[n_overloads] = overloads
t_overloads[name] = overloads
context(n_overloads)
else
context(unsetvalue)
end
end
}
|
