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
|
if not modules then modules = { } end modules ['node-dum'] = {
version = 1.001,
comment = "companion to luatex-*.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
nodes = nodes or { }
fonts = fonts or { }
attributes = attributes or { }
nodes.pool = nodes.pool or { }
nodes.handlers = nodes.handlers or { }
local nodecodes = { } for k,v in next, node.types () do nodecodes[string.gsub(v,"_","")] = k end
local whatcodes = { } for k,v in next, node.whatsits() do whatcodes[string.gsub(v,"_","")] = k end
local glyphcodes = { [0] = "character", "glyph", "ligature", "ghost", "left", "right" }
nodes.nodecodes = nodecodes
nodes.whatcodes = whatcodes
nodes.whatsitcodes = whatcodes
nodes.glyphcodes = glyphcodes
local traverse_id = node.traverse_id
local free_node = node.free
local remove_node = node.remove
local new_node = node.new
local glyph_code = nodecodes.glyph
function nodes.simple_font_handler(head)
-- lang.hyphenate(head)
head = nodes.handlers.characters(head)
nodes.injections.handler(head)
nodes.handlers.protectglyphs(head)
head = node.ligaturing(head)
head = node.kerning(head)
return head
end
if tex.attribute[0] ~= 0 then
texio.write_nl("log","!")
texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
texio.write_nl("log","!")
tex.attribute[0] = 0 -- else no features
end
nodes.handlers.protectglyphs = node.protect_glyphs
nodes.handlers.unprotectglyphs = node.unprotect_glyphs
function nodes.handlers.characters(head)
local fontdata = fonts.identifiers
if fontdata then
local usedfonts, done, prevfont = { }, false, nil
for n in traverse_id(glyph_code,head) do
local font = n.font
if font ~= prevfont then
prevfont = font
local used = usedfonts[font]
if not used then
local tfmdata = fontdata[font] --
if tfmdata then
local shared = tfmdata.shared -- we need to check shared, only when same features
if shared then
local processors = shared.processes
if processors and #processors > 0 then
usedfonts[font] = processors
done = true
end
end
end
end
end
end
if done then
for font, processors in next, usedfonts do
for i=1,#processors do
local h, d = processors[i](head,font,0)
head, done = h or head, done or d
end
end
end
return head, true
else
return head, false
end
end
-- helper
function nodes.pool.kern(k)
local n = new_node("kern",1)
n.kern = k
return n
end
function nodes.remove(head, current, free_too)
local t = current
head, current = remove_node(head,current)
if t then
if free_too then
free_node(t)
t = nil
else
t.next, t.prev = nil, nil
end
end
return head, current, t
end
function nodes.delete(head,current)
return nodes.remove(head,current,true)
end
nodes.before = node.insert_before
nodes.after = node.insert_after
-- attributes
attributes.unsetvalue = -0x7FFFFFFF
local numbers, last = { }, 127
function attributes.private(name)
local number = numbers[name]
if not number then
if last < 255 then
last = last + 1
end
number = last
numbers[name] = number
end
return number
end
|
