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
|
if not modules then modules = { } end modules ['font-otd'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type = type
local match = string.match
local sequenced = table.sequenced
local trace_dynamics = false trackers.register("otf.dynamics", function(v) trace_dynamics = v end)
local trace_applied = false trackers.register("otf.applied", function(v) trace_applied = v end)
local report_otf = logs.reporter("fonts","otf loading")
local report_process = logs.reporter("fonts","otf process")
local fonts = fonts
local otf = fonts.handlers.otf
local hashes = fonts.hashes
local definers = fonts.definers
local constructors = fonts.constructors
local specifiers = fonts.specifiers
local fontdata = hashes.identifiers
----- fontresources = hashes.resources -- not yet defined
local contextsetups = specifiers.contextsetups
local contextnumbers = specifiers.contextnumbers
local contextmerged = specifiers.contextmerged
local setmetatableindex = table.setmetatableindex
local otffeatures = fonts.constructors.newfeatures("otf")
local registerotffeature = otffeatures.register
local fontdynamics = { }
hashes.dynamics = fontdynamics
local a_to_script = { }
local a_to_language = { }
setmetatableindex(fontdynamics, function(t,font)
local d = fontdata[font].shared.dynamics or false
t[font] = d
return d
end)
function otf.setdynamics(font,attribute)
local features = contextsetups[contextnumbers[attribute]] -- can be moved to caller
if features then
local dynamics = fontdynamics[font]
local script = features.script or 'dflt'
local language = features.language or 'dflt'
if script == "auto" then
-- checkedscript and resources are defined later so we cannot shortcut them
script = definers.checkedscript(fontdata[font],hashes.resources[font],features)
end
local ds = dynamics[script] -- can be metatable magic (less testing)
if not ds then
ds = { }
dynamics[script] = ds
end
local dsl = ds[language]
if not dsl then
dsl = { }
ds[language] = dsl
end
local dsla = dsl[attribute]
if not dsla then
local tfmdata = fontdata[font]
a_to_script [attribute] = script
a_to_language[attribute] = language
-- we need to save some values
local properties = tfmdata.properties
local shared = tfmdata.shared
local s_script = properties.script
local s_language = properties.language
local s_mode = properties.mode
local s_features = shared.features
properties.mode = "node"
properties.language = language
properties.script = script
properties.dynamics = true -- handy for tracing
shared.features = { }
-- end of save
local set = constructors.checkedfeatures("otf",features)
set.mode = "node" -- really needed
dsla = otf.setfeatures(tfmdata,set)
if trace_dynamics then
report_otf("setting dynamics %s: attribute %s, script %s, language %s, set: %s",contextnumbers[attribute],attribute,script,language,sequenced(set))
end
-- we need to restore some values
properties.script = s_script
properties.language = s_language
properties.mode = s_mode
shared.features = s_features
-- end of restore
dynamics[script][language][attribute] = dsla -- cache
elseif trace_dynamics then
-- report_otf("using dynamics %s: attribute %s, script %s, language %s",contextnumbers[attribute],attribute,script,language)
end
return dsla
end
end
function otf.scriptandlanguage(tfmdata,attr)
local properties = tfmdata.properties
if attr and attr > 0 then
return a_to_script[attr] or properties.script or "dflt", a_to_language[attr] or properties.language or "dflt"
else
return properties.script or "dflt", properties.language or "dflt"
end
end
-- we reimplement the dataset resolver
local constants = fonts.analyzers.constants
local resolved = { } -- we only resolve a font,script,language,attribute pair once
local wildcard = "*"
local default = "dflt"
local function initialize(sequence,script,language,s_enabled,a_enabled,font,attr,dynamic)
local features = sequence.features
if features then
for kind, scripts in next, features do
local s_e = s_enabled and s_enabled[kind] -- the value
local a_e = a_enabled and a_enabled[kind] -- the value
local e_e = s_e or a_e -- todo: when one of them is true and the other is a value
if e_e then
local languages = scripts[script] or scripts[wildcard]
if languages then
local valid, what = false
-- not languages[language] or languages[default] or languages[wildcard] because we want tracing
-- only first attribute match check, so we assume simple fina's
-- default can become a font feature itself
if languages[language] then
valid = e_e -- was true
what = language
-- elseif languages[default] then
-- valid = true
-- what = default
elseif languages[wildcard] then
valid = e_e -- was true
what = wildcard
end
if valid then
local attribute = constants[kind] or false
if a_e and dynamic < 0 then
valid = false
end
if trace_applied then
local typ, action = match(sequence.type,"(.*)_(.*)") -- brrr
report_process(
"%s font: %03i, dynamic: %03i, kind: %s, script: %-4s, language: %-4s (%-4s), type: %s, action: %s, name: %s",
(valid and "+") or "-",font,attr or 0,kind,script,language,what,typ,action,sequence.name)
end
return { valid, attribute, sequence.chain or 0, kind, sequence }
end
end
end
end
return false -- { valid, attribute, chain, "generic", sequence } -- false anyway, could be flag instead of table
else
return false -- { false, false, chain, false, sequence } -- indirect lookup, part of chain (todo: make this a separate table)
end
end
-- local contextresolved = { }
--
-- setmetatableindex(contextresolved, function(t,k)
-- local v = contextsetups[contextnumbers[k]]
-- t[k] = v
-- return v
-- end)
function otf.dataset(tfmdata,font,attr) -- attr only when explicit (as in special parbuilder)
local script, language, s_enabled, a_enabled, dynamic
if attr and attr ~= 0 then
local features = contextsetups[contextnumbers[attr]] -- could be a direct list
-- local features = contextresolved[attr]
language = features.language or "dflt"
script = features.script or "dflt"
a_enabled = features
dynamic = contextmerged[attr] or 0
if dynamic == 2 or dynamic == -2 then
-- font based
s_enabled = tfmdata.shared.features
end
else
local properties = tfmdata.properties
language = properties.language or "dflt"
script = properties.script or "dflt"
s_enabled = tfmdata.shared.features -- can be made local to the resolver
dynamic = 0
end
local res = resolved[font]
if not res then
res = { }
resolved[font] = res
end
local rs = res[script]
if not rs then
rs = { }
res[script] = rs
end
local rl = rs[language]
if not rl then
rl = { }
rs[language] = rl
end
local ra = rl[attr]
if ra == nil then -- attr can be false
ra = {
-- indexed but we can also add specific data by key in:
}
rl[attr] = ra
local sequences = tfmdata.resources.sequences
setmetatableindex(ra, function(t,k)
if type(k) == "number" then
local v = initialize(sequences[k],script,language,s_enabled,a_enabled,font,attr,dynamic)
t[k] = v or false
return v
end
end)
end
return ra
end
|
