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
|
if not modules then modules = { } end modules ['luatex-fonts-cbk'] = {
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"
}
if context then
texio.write_nl("fatal error: this module is not for context")
os.exit()
end
local fonts = fonts
local nodes = nodes
-- Fonts: (might move to node-gef.lua)
local traverse_id = node.traverse_id
local free_node = node.free
local remove_node = node.remove
local glyph_code = nodes.nodecodes.glyph
local disc_code = nodes.nodecodes.disc
-- from now on we apply ligaturing and kerning here because it might interfere with complex
-- opentype discretionary handling where the base ligature pass expect some weird extra
-- pointers (which then confuse the tail slider that has some checking built in)
local ligaturing = node.ligaturing
local kerning = node.kerning
local basepass = true
local function l_warning() texio.write_nl("warning: node.ligaturing called directly") l_warning = nil end
local function k_warning() texio.write_nl("warning: node.kerning called directly") k_warning = nil end
function node.ligaturing(...)
if basepass and l_warning then
l_warning()
end
return ligaturing(...)
end
function node.kerning(...)
if basepass and k_warning then
k_warning()
end
return kerning(...)
end
function nodes.handlers.setbasepass(v)
basepass = v
end
function nodes.handlers.nodepass(head)
local fontdata = fonts.hashes.identifiers
if fontdata then
local usedfonts = { }
local basefonts = { }
local prevfont = nil
local basefont = nil
local variants = nil
local redundant = nil
for n in traverse_id(glyph_code,head) do
local font = n.font
if font ~= prevfont then
if basefont then
basefont[2] = n.prev
end
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
elseif basepass then
basefont = { n, nil }
basefonts[#basefonts+1] = basefont
end
end
local resources = tfmdata.resources
variants = resources and resources.variants
variants = variants and next(variants) and variants or false
end
else
local tfmdata = fontdata[prevfont]
if tfmdata then
local resources = tfmdata.resources
variants = resources and resources.variants
variants = variants and next(variants) and variants or false
end
end
end
if variants then
local char = n.char
if char >= 0xFE00 and (char <= 0xFE0F or (char >= 0xE0100 and char <= 0xE01EF)) then
local hash = variants[char]
if hash then
local p = n.prev
if p and p.id == glyph_code then
local variant = hash[p.char]
if variant then
p.char = variant
if not redundant then
redundant = { n }
else
redundant[#redundant+1] = n
end
end
end
end
end
end
end
if redundant then
for i=1,#redundant do
local n = redundant[i]
remove_node(head,n)
free_node(n)
end
end
for d in traverse_id(disc_code,head) do
local r = d.replace
if r then
for n in traverse_id(glyph_code,r) 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
end
end
end
end
end
end
end
end
if next(usedfonts) then
for font, processors in next, usedfonts do
for i=1,#processors do
head = processors[i](head,font,0) or head
end
end
end
if basepass and #basefonts > 0 then
for i=1,#basefonts do
local range = basefonts[i]
local start = range[1]
local stop = range[2]
-- maybe even: if start and start ~= stop then
if start or stop then
local prev = nil
local next = nil
local front = start == head
if stop then
next = stop.next
start, stop = ligaturing(start,stop)
start, stop = kerning(start,stop)
elseif start then
prev = start.prev
start = ligaturing(start)
start = kerning(start)
end
if prev then
start.prev = prev
prev.next = start
end
if next then
stop.next = next
next.prev = stop
end
if front then
head = start
end
end
end
end
return head, true
else
return head, false
end
end
function nodes.handlers.basepass(head)
if basepass then
head = ligaturing(head)
head = kerning(head)
end
return head, true
end
local nodepass = nodes.handlers.nodepass
local basepass = nodes.handlers.basepass
local injectpass = nodes.injections.handler
local protectpass = nodes.handlers.protectglyphs
function nodes.simple_font_handler(head)
if head then
head = nodepass(head)
head = injectpass(head)
head = basepass(head)
protectpass(head)
return head, true
else
return head, false
end
end
|
