summaryrefslogtreecommitdiff
path: root/otfl-font-nms.lua
blob: aecdc0b6723e5dc16800933384a47731e7c2f863 (plain)
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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
if not modules then modules = { } end modules ['font-nms'] = {
    version   = 1.002,
    comment   = "companion to luaotfload.lua",
    author    = "Khaled Hosny and Elie Roux",
    copyright = "Luaotfload Development Team",
    license   = "GNU GPL v2"
}

-- This is a patch for otfl-font-def.lua, that defines a reader for ofm fonts,
-- this is necessary if we set the forced field of the specification to 'ofm'
-- we use it only when using luaotfload, not mkluatexfontdb.
if fonts and fonts.tfm and fonts.tfm.readers then
    fonts.tfm.readers.ofm = fonts.tfm.readers.tfm
end

-- This is a necessary initalization in order not to rebuild an existing font.
-- Maybe 600 should be replaced by \pdfpkresolution
-- or texconfig.pk_dpi (and it should be replaced dynamically), but we don't
-- have access (yet) to the texconfig table, so we let it be 600. Anyway, it
-- does still work fine even if \pdfpkresolution is changed.
kpse.init_prog('', 600, '/')

fonts                = fonts       or { }
fonts.names          = fonts.names or { }

local names          = fonts.names
local names_dir      = "/luatex/generic/luaotfload/names/"
names.version        = 2.009 -- not the same as in context
names.data           = nil
names.path           = {
    basename  = "otfl-names.lua",
    localdir  = kpse.expand_var("$TEXMFVAR")    .. names_dir,
    systemdir = kpse.expand_var("$TEXMFSYSVAR") .. names_dir,
}


local splitpath, expandpath = file.split_path, kpse.expand_path
local glob, basename        = dir.glob, file.basename
local upper, lower, format  = string.upper, string.lower, string.format
local gsub, match, rpadd    = string.gsub, string.match, string.rpadd
local utfgsub               = unicode.utf8.gsub

local trace_short    = false --tracing adapted to rebuilding of the database inside a document
local trace_progress = true  --trackers.register("names.progress", function(v) trace_progress = v end)
local trace_search   = false --trackers.register("names.search",   function(v) trace_search   = v end)
local trace_loading  = false --trackers.register("names.loading",  function(v) trace_loading  = v end)


-- Basic function from <http://stackoverflow.com/questions/2282444/how-to-check-if-a-table-contains-an-element-in-lua>
function table.contains(table, element)
  for _, value in pairs(table) do
    if value == element then
      return true
    end
  end
  return false
end


local function sanitize(str)
    if str then
        return utfgsub(lower(str), "[^%a%d]", "")
    else
        return str -- nil
    end
end

local function fontnames_init()
    return {
        mappings  = { },
        status    = { },
        version   = names.version,
    }
end

function names.load()
    -- this sets the output of the database building accordingly.
    names.set_log_level(-1)
    local localpath  = names.path.localdir  .. names.path.basename
    local systempath = names.path.systemdir .. names.path.basename
    local kpsefound  = kpse.find_file(names.path.basename)
    local foundname
    local data
    if kpsefound and file.isreadable(kpsefound) then
        data = dofile(kpsefound)
	foundname = kpsefound
    elseif file.isreadable(localpath)  then
        data = dofile(localpath)
	foundname = localpath
    elseif file.isreadable(systempath) then
        data = dofile(systempath)
	foundname = systempath
    end
    if data then
        logs.report("load font",
            "loaded font names database: %s", foundname)
    else
        logs.report("load font",
            "no font names database found, generating new one")
        data = names.update()
        names.save(data)
    end
    return data
end

local synonyms  = {
    regular = {
        normal = true,
        roman  = true,
        plain  = true,
        book   = true,
        medium = true,
    },
    italic = {
        regularitalic = true,
        normalitalic  = true,
        oblique       = true,
        slant         = true,
    },
    bolditalic = {
        boldoblique   = true,
        boldslant     = true,
    },
}

local loaded   = false
local reloaded = false

function names.resolve(specification)
    local tfm   = resolvers.find_file(specification.name, "tfm")
    local ext = lower(file.extname(specification.name))

    if tfm then
        -- is a tfm font, skip names database
        if ext == 'tfm' then
            return specification.name, false
        else
            return specification.name..'.tfm', false
        end
    elseif resolvers.find_file(specification.name, "ofm") then
        if ext == 'ofm' then
            return specification.name, false
        else
            return specification.name..'.ofm', false
        end
    end

    local name  = sanitize(specification.name)
    local style = sanitize(specification.style) or "regular"

    local size
    if specification.optsize then
        size = tonumber(specification.optsize)
    elseif specification.size then
        size = specification.size / 65536
    end


    if not loaded then
        names.data = names.load()
        loaded     = true
    end

    local data = names.data
    if type(data) == "table" and data.version == names.version then
        if data.mappings then
            -- if the specified name ends like a font file, we first look for
            -- it through kpse, and if we don't find it, we look for it in
            -- the database.
            if table.contains(font_extensions_lc, ext) then
                local fname = specification.name
                -- for absolute and relative path, kpse will find them, so
                -- there shouldn't be any problem
                local path = resolvers.find_file(fname, "opentype fonts")
                if not path then
                    path = resolvers.find_file(fname, "truetype fonts")
                end
                if path then
                    return path -- or fname ?
                else
                    for _,face in ipairs(data.mappings) do
                        if basename(face.filename[1]) == fname then
                            return face.filename[1], face.filename[2]
                        end
                    end
                end
                return specification.name
            end
            local found = { }
            for _,face in ipairs(data.mappings) do
                local family    = sanitize(face.names.family)
                local subfamily = sanitize(face.names.subfamily)
                local fullname  = sanitize(face.names.fullname)
                local psname    = sanitize(face.names.psname)
                local fontname  = sanitize(face.fontname)
                local pfullname = sanitize(face.fullname)
                local optsize, dsnsize, maxsize, minsize
                if #face.size > 0 then
                    optsize = face.size
                    dsnsize = optsize[1] and optsize[1] / 10
                    -- can be nil
                    maxsize = optsize[2] and optsize[2] / 10 or dsnsize
                    minsize = optsize[3] and optsize[3] / 10 or dsnsize
                end
                if name == family then
                    if subfamily == style then
                        if optsize then
                            if dsnsize == size
                            or (size > minsize and size <= maxsize) then
                                found[1] = face
                                break
                            else
                                found[#found+1] = face
                            end
                        else
                            found[1] = face
                            break
                        end
                    elseif synonyms[style] and synonyms[style][subfamily] then
                        if optsize then
                            if dsnsize == size
                            or (size > minsize and size <= maxsize) then
                                found[1] = face
                                break
                            else
                                found[#found+1] = face
                            end
                        else
                            found[1] = face
                            break
                        end
                    else
                        found[1] = face
                    end
                else
                    if name == fullname
                    or name == pfullname
                    or name == fontname
                    or name == psname then
                        if optsize then
                            if dsnsize == size
                            or (size > minsize and size <= maxsize) then
                                found[1] = face
                                break
                            else
                                found[#found+1] = face
                            end
                        else
                            found[1] = face
                            break
                        end
                    end
                end
            end
            if #found == 1 then
                if kpse.lookup(found[1].filename[1]) then
                    logs.report("load font",
                                "font family='%s', subfamily='%s' found: %s",
                                name, style, found[1].filename[1])
                    return found[1].filename[1], found[1].filename[2]
                end
            elseif #found > 1 then
                -- we found matching font(s) but not in the requested optical
                -- sizes, so we loop through the matches to find the one with
                -- least difference from the requested size.
                local closest
                local least = math.huge -- initial value is infinity
                for i,face in ipairs(found) do
                    local dsnsize    = face.size[1]/10
                    local difference = math.abs(dsnsize-size)
                    if difference < least then
                        closest = face
                        least   = difference
                    end
                end
                if kpse.lookup(closest.filename[1]) then
                    logs.report("load font",
                                "font family='%s', subfamily='%s' found: %s",
                                name, style, closest.filename[1])
                    return closest.filename[1], closest.filename[2]
                end
            end
            -- no font found so far
            if not reloaded then
                -- try reloading the database
                names.data = names.update(names.data)
                names.save(names.data)
                reloaded   = true
                return names.resolve(specification)
            else
                -- else, fallback to filename
                return specification.name, false
            end
        end
    else
        if not reloaded then
            names.data = names.update()
            names.save(names.data)
            reloaded   = true
            return names.resolve(specification)
        else
            return specification.name, false
        end
    end
end

names.resolvespec = names.resolve

function names.set_log_level(level)
    if level == -1 then
        trace_progress = false
        trace_short = true
    elseif level == 2 then
        trace_progress = false
        trace_loading = true
    elseif level >= 3 then
        trace_progress = false
        trace_loading = true
        trace_search = true
    end
end

local lastislog = 0

function log(fmt, ...)
    lastislog = 1
    texio.write_nl(format("luaotfload | %s", format(fmt,...)))
end

logs        = logs or { }
logs.report = logs.report or log
logs.info   = logs.info or log

local log = names.log

-- The progress bar
local function progress(current, total)
    if trace_progress then
--      local width   = os.getenv("COLUMNS") -2 --doesn't work
        local width   = 78
        local percent = current/total
        local gauge   = format("[%s]", rpadd(" ", width, " "))
        if percent > 0 then
            local done = rpadd("=", (width * percent) - 1, "=") .. ">"
            gauge = format("[%s]", rpadd(done, width, " ") )
        end
        if lastislog == 1 then
            texio.write_nl("")
            lastislog = 0
        end
        io.stderr:write("\r"..gauge)
        io.stderr:flush()
    end
end

local function font_fullinfo(filename, subfont, texmf)
    local t = { }
    local f = fontloader.open(filename, subfont)
    if not f then
        logs.report("error: failed to open %s", filename)
        return nil
    end
    local m = fontloader.to_table(f)
    fontloader.close(f)
    collectgarbage('collect')
    -- see http://www.microsoft.com/typography/OTSPEC/features_pt.htm#size
    if m.fontstyle_name then
        for _,v in pairs(m.fontstyle_name) do
            if v.lang == 1033 then
                t.fontstyle_name = v.name
            end
        end
    end
    if m.names then
        for _,v in pairs(m.names) do
            if v.lang == "English (US)" then
                t.names = {
                    -- see
                    -- http://developer.apple.com/textfonts/
                    -- TTRefMan/RM06/Chap6name.html
                    fullname = v.names.compatfull     or v.names.fullname,
                    family   = v.names.preffamilyname or v.names.family,
                    subfamily= t.fontstyle_name       or v.names.prefmodifiers  or v.names.subfamily,
                    psname   = v.names.postscriptname
                }
            end
        end
    end
    t.fontname    = m.fontname
    t.fullname    = m.fullname
    t.familyname  = m.familyname
    t.filename    = { texmf and basename(filename) or filename, subfont }
    t.weight      = m.pfminfo.weight
    t.width       = m.pfminfo.width
    t.slant       = m.italicangle
    -- don't waste the space with zero values
    t.size = {
        m.design_size         ~= 0 and m.design_size         or nil,
        m.design_range_top    ~= 0 and m.design_range_top    or nil,
        m.design_range_bottom ~= 0 and m.design_range_bottom or nil,
    }
    return t
end

local function load_font(filename, fontnames, newfontnames, texmf)
    local newmappings = newfontnames.mappings
    local newstatus   = newfontnames.status
    local mappings    = fontnames.mappings
    local status      = fontnames.status
    local basefile    = texmf and basename(filename) or filename
    if filename then
        local timestamp, db_timestamp
        db_timestamp        = status[basefile] and status[basefile].timestamp
        timestamp           = lfs.attributes(filename, "modification")

        if newstatus[basefile] then
            -- already indexed in this run
            if newstatus[basefile].timestamp == timestamp then
                return
            end
        end

        newstatus[basefile] = newstatus[basefile] or { }
        newstatus[basefile].timestamp = timestamp
        newstatus[basefile].index     = newstatus[basefile].index or { }

        if db_timestamp == timestamp and not newstatus[basefile].index[1] then
            for _,v in ipairs(status[basefile].index) do
                local index = #newstatus[basefile].index
                newmappings[#newmappings+1]        = mappings[v]
                newstatus[basefile].index[index+1] = #newmappings
            end
            if trace_loading then
                logs.report("font already indexed: %s", basefile)
            end
            return
        end
        if trace_loading then
            logs.report("loading font: %s", basefile)
        end
        local info = fontloader.info(filename)
        if info then
            if type(info) == "table" and #info > 1 then
                for i in ipairs(info) do
                    local fullinfo = font_fullinfo(filename, i-1, texmf)
                    local index = newstatus[basefile].index[i]
                    if newstatus[basefile].index[i] then
                        index = newstatus[basefile].index[i]
                    else
                        index = #newmappings+1
                    end
                    newmappings[index]           = fullinfo
                    newstatus[basefile].index[i] = index
                end
            else
                local fullinfo = font_fullinfo(filename, false, texmf)
                local index
                if newstatus[basefile].index[1] then
                    index = newstatus[basefile].index[1]
                else
                    index = #newmappings+1
                end
                newmappings[index]           = fullinfo
                newstatus[basefile].index[1] = index
            end
        else
            if trace_loading then
               logs.report("failed to load %s", basefile)
            end
        end
    end
end

local function path_normalize(path)
    --[[
    path normalization:
    - a\b\c  -> a/b/c
    - a/../b -> b
    - /cygdrive/a/b -> a:/b
    --]]
    if os.type == "windows" or os.type == "msdos" or os.name == "cygwin" then
        path = path:gsub('\\', '/')
        path = path:lower()
        -- for cygwin cases...
        path = path:gsub('^/cygdrive/(%a)/', '%1:/')
    end
    path = file.collapse_path(path)
    return path
end

fonts.path_normalize = path_normalize

if os.name == "macosx" then
    -- While Mac OS X 10.6 has a problem with TTC files, ignore them globally:
    font_extensions = {
      "otf", "ttf", "dfont", "OTF", "TTF", "DFONT"
    }
    font_extensions_lc = { "otf", "ttf", "dfont" }
else
    font_extensions = {
      "otf", "ttf", "ttc", "dfont", "OTF", "TTF", "TTC", "DFONT"
    }
    font_extensions_lc = { "otf", "ttf", "ttc", "dfont" }
end

local function scan_dir(dirname, fontnames, newfontnames, texmf)
    --[[
    this function scans a directory and populates the list of fonts
    with all the fonts it finds.
    - dirname is the name of the directory to scan
    - names is the font database to fill
    - texmf is a boolean saying if we are scanning a texmf directory
    --]]
    local list, found = { }, { }
    local nbfound = 0
    if trace_search then
        logs.report("scanning '%s'", dirname)
    end
    for _,ext in ipairs(font_extensions) do
        found = glob(dirname .. "/**." .. ext)
        -- note that glob fails silently on broken symlinks, which happens
        -- sometimes in TeX Live.
        if trace_search then
            logs.report("%s '%s' fonts found", #found, ext)
        end
        nbfound = nbfound + #found
        table.append(list, found)
    end
    if trace_search then
        logs.report("%d fonts found in '%s'", nbfound, dirname)
    end
    list = remove_ignore_fonts(list) -- fixme: general solution required
    for _,fnt in ipairs(list) do
        fnt = path_normalize(fnt)
        load_font(fnt, fontnames, newfontnames, texmf)
    end
end

-- Temporary until a general solution is implemented:
if os.name == "macosx" then
    ignore_fonts = {
      -- this font kills the indexer:
      "/System/Library/Fonts/LastResort.ttf"
    }
    function remove_ignore_fonts(fonts)
        for N,fnt in ipairs(fonts) do
          if table.contains(ignore_fonts,fnt) then
            logs.report("ignoring font '%s'", fnt)
            table.remove(fonts,N)
          end
        end
        return fonts
    end
-- This function is only necessary, for now, on Mac OS X.
else
    function remove_ignore_fonts(fonts)
        return fonts
    end
end

local function scan_texmf_tree(fontnames, newfontnames)
    --[[
    The function that scans all fonts in the texmf tree, through kpathsea
    variables OPENTYPEFONTS and TTFONTS of texmf.cnf
    --]]
    if trace_progress then
        if expandpath("$OSFONTDIR"):is_empty() then
            logs.report("scanning TEXMF fonts:")
        else
            logs.report("scanning TEXMF and OS fonts:")
        end
    end
    if trace_short then
        if expandpath("$OSFONTDIR"):is_empty() then
            logs.info("scanning TEXMF fonts...")
        else
            logs.info("scanning TEXMF and OS fonts...")
        end
    end
    local fontdirs = expandpath("$OPENTYPEFONTS"):gsub("^\.", "")
    fontdirs = fontdirs .. expandpath("$TTFONTS"):gsub("^\.", "")
    if not fontdirs:is_empty() then
        fontdirs = splitpath(fontdirs)
        count = 0
        for _,d in ipairs(fontdirs) do
            count = count + 1
            progress(count, #fontdirs)
            scan_dir(d, fontnames, newfontnames, true)
        end
    end
end

local function read_fcdata(data)
    --[[
    this function takes raw data returned by fc-list, parses it, normalizes the
    paths and makes a list out of it.
    --]]
    local list = { }
    for line in data:lines() do
        line = line:gsub(": ", "")
        local ext = match(line,"^.+%.([^/\\]-)$") or ""
        ext = lower(ext)
        if table.contains(font_extensions_lc, ext) then
            list[#list+1] = path_normalize(line:gsub(": ", ""))
        end
    end
    return list
end

--[[
  Under Mac OSX, fc-list does not exist and there is no guaranty that OSFONTDIR
  is correctly filled, so for now we use static paths.
]]

local static_osx_dirs = {
    kpse.expand_path('~') .. "/Library/Fonts",
    "/Library/Fonts",
    "/System/Library/Fonts",
    "/Network/Library/Fonts",
}

local function scan_os_fonts(fontnames, newfontnames)
    --[[
    This function scans the OS fonts through fontcache (fc-list), it executes
    only if OSFONTDIR is empty (which is the case under most Unix by default).
    If OSFONTDIR is non-empty, this means that the system fonts it contains have
    already been scanned, and thus we don't scan them again.
    --]]
    if expandpath("$OSFONTDIR"):is_empty() then 
        if trace_progress then
            logs.report("scanning OS fonts:")
        end
        if trace_short then
            logs.info("scanning OS fonts...")
        end
        -- under OSX, we don't rely on fc-list, we rely on some static
        -- directories instead
        if os.name == "macosx" then
            if trace_search then
                logs.info("searching in static system directories...")
            end
            count = 0
            for _,d in ipairs(static_osx_dirs) do
                count = count + 1
                progress(count, #static_osx_dirs)
                scan_dir(d, fontnames, newfontnames, false)
            end
        else
            if trace_search then
                logs.info("executing 'fc-list : file' and parsing its result...")
            end
            local data = io.popen("fc-list : file", 'r')
            if data then
                local list = read_fcdata(data)
                data:close()
                if trace_search then
                    logs.report("%d fonts found", #list)
                end
                count = 0
                for _,fnt in ipairs(list) do
                    count = count + 1
                    progress(count, #list)
                    load_font(fnt, fontnames, newfontnames, false)
                end
            end
        end
    end
end

local function update_names(fontnames, force)
    --[[
    The main function, scans everything
    - fontnames is the final table to return
    - force is whether we rebuild it from scratch or not
    --]]
    if trace_short then
        logs.info("Updating the font names database:")
    end
    if force then
        fontnames = fontnames_init()
    else
        if not fontnames
        or not fontnames.version
        or fontnames.version ~= names.version then
            fontnames = fontnames_init()
            if trace_search then
                logs.report("no font names database or old one found, "
                          .."generating new one")
            end
        end
    end
    local newfontnames = fontnames_init()
    scan_texmf_tree(fontnames, newfontnames)
    scan_os_fonts  (fontnames, newfontnames)
    return newfontnames
end

local function save_names(fontnames)
    local savepath  = names.path.localdir
    if not lfs.isdir(savepath) then
        dir.mkdirs(savepath)
    end
    io.savedata(savepath .. names.path.basename,
                table.serialize(fontnames, true))
end

names.scan   = scan_dir
names.update = update_names
names.save   = save_names