1if not modules then modules = { } end modules ['font-hsh'] = {
2 version = 1.001,
3 comment = "companion to font-ini.mkiv",
4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5 copyright = "PRAGMA ADE / ConTeXt Development Team",
6 license = "see context related readme files"
7}
8
9local rawget = rawget
10
11local setmetatableindex = table.setmetatableindex
12local currentfont = font and font.current
13local allocate = utilities.storage.allocate
14
15local fonts = fonts
16local hashes = fonts.hashes or allocate()
17fonts.hashes = hashes
18
19
20
21local identifiers = hashes.identifiers or allocate()
22local characters = hashes.characters or allocate()
23local descriptions = hashes.descriptions or allocate()
24local parameters = hashes.parameters or allocate()
25local mathparameters = hashes.mathparameters or allocate()
26local properties = hashes.properties or allocate()
27local resources = hashes.resources or allocate()
28local spacings = hashes.spacings or allocate()
29local spaces = hashes.spaces or allocate()
30local quads = hashes.quads or allocate()
31local xheights = hashes.xheights or allocate()
32local csnames = hashes.csnames or allocate()
33local features = hashes.features or allocate()
34local marks = hashes.marks or allocate()
35local classes = hashes.classes or allocate()
36local italics = hashes.italics or allocate()
37local lastmathids = hashes.lastmathids or allocate()
38local dynamics = hashes.dynamics or allocate()
39local unicodes = hashes.unicodes or allocate()
40local unislots = hashes.unislots or allocate()
41local originals = hashes.originals or allocate()
42local modes = hashes.modes or allocate()
43local variants = hashes.variants or allocate()
44
45hashes.characters = characters
46hashes.descriptions = descriptions
47hashes.parameters = parameters
48hashes.mathparameters = mathparameters
49hashes.properties = properties
50hashes.resources = resources
51hashes.spacings = spacings
52hashes.spaces = spaces
53hashes.quads = quads hashes.emwidths = quads
54hashes.xheights = xheights hashes.exheights = xheights
55hashes.csnames = csnames
56hashes.features = features
57hashes.marks = marks
58hashes.classes = classes
59hashes.italics = italics
60hashes.lastmathids = lastmathids
61hashes.dynamics = dynamics
62hashes.unicodes = unicodes
63hashes.unislots = unislots
64hashes.originals = originals
65hashes.modes = modes
66hashes.variants = variants
67
68local nodepool = nodes and nodes.pool
69local dummyglyph = nodepool and nodepool.register(nodepool.glyph())
70
71local nulldata = allocate {
72 name = "nullfont",
73 characters = { },
74 descriptions = { },
75 properties = {
76 designsize = 786432,
77 },
78 parameters = {
79 slantperpoint = 0,
80 spacing = {
81 width = 256377,
82 stretch = 128188,
83 shrink = 85459,
84 extra = 85459,
85 },
86 quad = 786432,
87 size = 786432,
88 slant = 0,
89 space = 256377,
90 spacestretch = 128188,
91 spaceshrink = 85459,
92 xheight = 338952,
93 quad = 786432,
94 extraspace = 85459,
95 },
96}
97
98fonts.nulldata = nulldata
99
100fonts.constructors.enhanceparameters(nulldata.parameters)
101
102setmetatableindex(identifiers, function(t,k)
103 return k == true and identifiers[currentfont()] or nulldata
104end)
105
106if font then
107
108
109
110 local define = font.define
111 local setfont = font.setfont
112 local frozen = font.frozen
113
114 function fonts.reserveid(fontdata)
115 return define(fontdata or nulldata)
116 end
117
118 function fonts.enhanceid(id,fontdata)
119 if not frozen(id) then
120 setfont(id,fontdata)
121 end
122 end
123
124end
125
126setmetatableindex(characters, function(t,k)
127 if k == true then
128 return characters[currentfont()]
129 else
130 local characters = identifiers[k].characters
131 t[k] = characters
132 return characters
133 end
134end)
135
136setmetatableindex(descriptions, function(t,k)
137 if k == true then
138 return descriptions[currentfont()]
139 else
140 local descriptions = identifiers[k].descriptions
141 t[k] = descriptions
142 return descriptions
143 end
144end)
145
146setmetatableindex(parameters, function(t,k)
147 if k == true then
148 return parameters[currentfont()]
149 else
150 local parameters = identifiers[k].parameters
151 t[k] = parameters
152 return parameters
153 end
154end)
155
156setmetatableindex(mathparameters, function(t,k)
157 if k == true then
158 return mathparameters[currentfont()]
159 else
160 local mathparameters = identifiers[k].mathparameters
161 t[k] = mathparameters
162 return mathparameters
163 end
164end)
165
166setmetatableindex(properties, function(t,k)
167 if k == true then
168 return properties[currentfont()]
169 else
170 local properties = identifiers[k].properties
171 t[k] = properties
172 return properties
173 end
174end)
175
176setmetatableindex(resources, function(t,k)
177 if k == true then
178 return resources[currentfont()]
179 else
180 local shared = identifiers[k].shared
181 local rawdata = shared and shared.rawdata
182 local resources = rawdata and rawdata.resources
183 t[k] = resources or false
184 return resources
185 end
186end)
187
188setmetatableindex(features, function(t,k)
189 if k == true then
190 return features[currentfont()]
191 else
192 local shared = identifiers[k].shared
193 local features = shared and shared.features or { }
194 t[k] = features
195 return features
196 end
197end)
198
199local nospacing = {
200 width = 0,
201 stretch = 0,
202 shrink = 0,
203 extra = 0,
204}
205
206setmetatableindex(spacings, function(t,k)
207 if k == true then
208 return spacings[currentfont()]
209 else
210 local parameters = parameters[k]
211 local spacing = parameters and parameters.spacing or nospacing
212 t[k] = spacing
213 return spacing
214 end
215end)
216
217setmetatableindex(spaces, function(t,k)
218 if k == true then
219 return spaces[currentfont()]
220 else
221 local space = spacings[k].width
222 t[k] = space
223 return space
224 end
225end)
226
227setmetatableindex(marks, function(t,k)
228 if k == true then
229 return marks[currentfont()]
230 else
231 local resources = identifiers[k].resources or { }
232 local marks = resources.marks or { }
233 t[k] = marks
234 return marks
235 end
236end)
237
238setmetatableindex(classes, function(t,k)
239 if k == true then
240 return classes[currentfont()]
241 else
242 local resources = identifiers[k].resources or { }
243 local classes = resources.classes or { }
244 t[k] = classes
245 return classes
246 end
247end)
248
249setmetatableindex(quads, function(t,k)
250 if k == true then
251 return quads[currentfont()]
252 else
253 local parameters = rawget(parameters,k)
254 local quad
255 if parameters then
256 quad = parameters.quad
257 elseif dummyglyph then
258 dummyglyph.font = k
259 dummyglyph.char = 0x2014
260 quad = dummyglyph.width
261 end
262 if not quad or quad == 0 then
263 quad = 655360
264 end
265 t[k] = quad
266 return quad
267 end
268end)
269
270setmetatableindex(xheights, function(t,k)
271 if k == true then
272 return xheights[currentfont()]
273 else
274 local parameters = rawget(parameters,k)
275 local xheight
276 if parameters then
277 xheight = parameters.xheight
278 elseif dummyglyph then
279 dummyglyph.font = k
280 dummyglyph.char = 0x78
281 xheight = dummyglyph.height
282 end
283 if not xheight or xheight == 0 then
284 xheight = 282460
285 end
286 t[k] = xheight
287 return xheight
288 end
289end)
290
291setmetatableindex(italics, function(t,k)
292 if k == true then
293 return italics[currentfont()]
294 else
295 local properties = identifiers[k].properties
296 local hasitalics = properties and properties.hasitalics or (properties.autoitalicamount and properties.autoitalicamount ~= 0)
297 if hasitalics then
298 hasitalics = characters[k]
299 else
300 hasitalics = false
301 end
302 t[k] = hasitalics
303 return hasitalics
304 end
305end)
306
307setmetatableindex(dynamics, function(t,k)
308 if k == true then
309 return dynamics[currentfont()]
310 else
311 local shared = identifiers[k].shared
312 local dynamics = shared and shared.dynamics or false
313 t[k] = dynamics
314 return dynamics
315 end
316end)
317
318setmetatableindex(unicodes, function(t,k)
319 if k == true then
320 return unicodes[currentfont()]
321 else
322 local resources = resources[k]
323 local unicodes = resources and resources.unicodes or { }
324 t[k] = unicodes
325 return unicodes
326 end
327end)
328
329setmetatableindex(originals, function(t,k)
330 if k == true then
331 return originals[currentfont()]
332 else
333 local resolved = { }
334 setmetatableindex(resolved,function(t,name)
335 local u = unicodes[k][name]
336 local d = u and descriptions[k][u]
337 local v = d and d.unicode or u or 0
338 t[name] = u
339 return v
340 end)
341 t[k] = resolved
342 return resolved
343 end
344end)
345
346setmetatableindex(unislots, function(t,k)
347 if k == true then
348 return unislots[currentfont()]
349 else
350 local characters = identifiers[k].characters
351 local resolved = setmetatableindex(function(t,k)
352 local c = characters[k]
353 local v = c and c.unicode or 0xFFFD
354 t[k] = v
355 return v
356 end)
357 t[k] = resolved
358 return resolved
359 end
360end)
361
362setmetatableindex(modes, function(t,k)
363 if k == true then
364 return modes[currentfont()]
365 else
366 local mode = properties[k].mode or "base"
367 t[k] = mode
368 return mode
369 end
370end)
371
372setmetatableindex(variants, function(t,k)
373 if k == true then
374 return variants[currentfont()]
375 else
376 local resources = resources[k]
377 if resources then
378 local variants = resources.variants
379 if variants and next(variants) then
380 t[k] = variants
381 return variants
382 end
383 end
384 t[k] = false
385 return false
386 end
387end)
388
389if font then
390
391 function font.getfont(id)
392 return identifiers[id]
393 end
394
395end
396
397
398 |
