diff options
Diffstat (limited to 'tex/context/base/font-map.lua')
| -rw-r--r-- | tex/context/base/font-map.lua | 333 |
1 files changed, 260 insertions, 73 deletions
diff --git a/tex/context/base/font-map.lua b/tex/context/base/font-map.lua index ce724b973..449a00f2e 100644 --- a/tex/context/base/font-map.lua +++ b/tex/context/base/font-map.lua @@ -6,12 +6,13 @@ if not modules then modules = { } end modules ['font-map'] = { license = "see context related readme files" } -local tonumber = tonumber +local tonumber, next, type = tonumber, next, type local match, format, find, concat, gsub, lower = string.match, string.format, string.find, table.concat, string.gsub, string.lower local P, R, S, C, Ct, Cc, lpegmatch = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Ct, lpeg.Cc, lpeg.match local utfbyte = utf.byte local floor = math.floor +local formatters = string.formatters local trace_loading = false trackers.register("fonts.loading", function(v) trace_loading = v end) local trace_mapping = false trackers.register("fonts.mapping", function(v) trace_unimapping = v end) @@ -22,6 +23,8 @@ local fonts = fonts or { } local mappings = fonts.mappings or { } fonts.mappings = mappings +local allocate = utilities.storage.allocate + --[[ldx-- <p>Eventually this code will disappear because map files are kind of obsolete. Some code may move to runtime or auxiliary modules.</p> @@ -66,26 +69,14 @@ local function makenameparser(str) end end --- local parser = makenameparser("Japan1") --- local parser = makenameparser() --- local function test(str) --- local b, a = lpegmatch(parser,str) --- print((a and table.serialize(b)) or b) --- end --- test("a.sc") --- test("a") --- test("uni1234") --- test("uni1234.xx") --- test("uni12349876") --- test("u123400987600") --- test("index1234") --- test("Japan1.123") +local f_single = formatters["%04X"] +local f_double = formatters["%04X%04X"] local function tounicode16(unicode,name) if unicode < 0x10000 then - return format("%04X",unicode) + return f_single(unicode) elseif unicode < 0x1FFFFFFFFF then - return format("%04X%04X",floor(unicode/1024),unicode%1024+0xDC00) + return f_double(floor(unicode/1024),unicode%1024+0xDC00) else report_fonts("can't convert %a in %a into tounicode",unicode,name) end @@ -94,18 +85,46 @@ end local function tounicode16sequence(unicodes,name) local t = { } for l=1,#unicodes do - local unicode = unicodes[l] - if unicode < 0x10000 then - t[l] = format("%04X",unicode) + local u = unicodes[l] + if u < 0x10000 then + t[l] = f_single(u) elseif unicode < 0x1FFFFFFFFF then - t[l] = format("%04X%04X",floor(unicode/1024),unicode%1024+0xDC00) + t[l] = f_double(floor(u/1024),u%1024+0xDC00) else - report_fonts ("can't convert %a in %a into tounicode",unicode,name) + report_fonts ("can't convert %a in %a into tounicode",u,name) + return end end return concat(t) end +local function tounicode(unicode,name) + if type(unicode) == "table" then + local t = { } + for l=1,#unicode do + local u = unicode[l] + if u < 0x10000 then + t[l] = f_single(u) + elseif u < 0x1FFFFFFFFF then + t[l] = f_double(floor(u/1024),u%1024+0xDC00) + else + report_fonts ("can't convert %a in %a into tounicode",u,name) + return + end + end + return concat(t) + else + if unicode < 0x10000 then + return f_single(unicode) + elseif unicode < 0x1FFFFFFFFF then + return f_double(floor(unicode/1024),unicode%1024+0xDC00) + else + report_fonts("can't convert %a in %a into tounicode",unicode,name) + end + end +end + + local function fromunicode16(str) if #str == 4 then return tonumber(str,16) @@ -151,6 +170,7 @@ end mappings.loadlumtable = loadlumtable mappings.makenameparser = makenameparser +mappings.tounicode = tounicode mappings.tounicode16 = tounicode16 mappings.tounicode16sequence = tounicode16sequence mappings.fromunicode16 = fromunicode16 @@ -164,6 +184,8 @@ local namesplitter = Ct(C((1 - ligseparator - varseparator)^1) * (ligseparator * -- print(string.formatters["%s: [% t]"](name,split)) -- end +-- maybe: ff fi fl ffi ffl => f_f f_i f_l f_f_i f_f_l + -- test("i.f_") -- test("this") -- test("this.that") @@ -171,33 +193,54 @@ local namesplitter = Ct(C((1 - ligseparator - varseparator)^1) * (ligseparator * -- test("such_so_more") -- test("such_so_more.that") +-- to be completed .. for fonts that use unicodes for ligatures which +-- is a actually a bad thing and should be avoided in the first place + +local overloads = allocate { + IJ = { name = "I_J", unicode = { 0x49, 0x4A }, mess = 0x0132 }, + ij = { name = "i_j", unicode = { 0x69, 0x6A }, mess = 0x0133 }, + ff = { name = "f_f", unicode = { 0x66, 0x66 }, mess = 0xFB00 }, + fi = { name = "f_i", unicode = { 0x66, 0x69 }, mess = 0xFB01 }, + fl = { name = "f_l", unicode = { 0x66, 0x6C }, mess = 0xFB02 }, + ffi = { name = "f_f_i", unicode = { 0x66, 0x66, 0x69 }, mess = 0xFB03 }, + ffl = { name = "f_f_l", unicode = { 0x66, 0x66, 0x6C }, mess = 0xFB04 }, + fj = { name = "f_j", unicode = { 0x66, 0x6A } }, + fk = { name = "f_k", unicode = { 0x66, 0x6B } }, +} + +for k, v in next, overloads do + local name = v.name + local mess = v.mess + if name then + overloads[name] = v + end + if mess then + overloads[mess] = v + end +end + +mappings.overloads = overloads + function mappings.addtounicode(data,filename) local resources = data.resources local properties = data.properties local descriptions = data.descriptions local unicodes = resources.unicodes + local lookuptypes = resources.lookuptypes if not unicodes then return end -- we need to move this code - unicodes['space'] = unicodes['space'] or 32 - unicodes['hyphen'] = unicodes['hyphen'] or 45 - unicodes['zwj'] = unicodes['zwj'] or 0x200D - unicodes['zwnj'] = unicodes['zwnj'] or 0x200C - -- the tounicode mapping is sparse and only needed for alternatives + unicodes['space'] = unicodes['space'] or 32 + unicodes['hyphen'] = unicodes['hyphen'] or 45 + unicodes['zwj'] = unicodes['zwj'] or 0x200D + unicodes['zwnj'] = unicodes['zwnj'] or 0x200C local private = fonts.constructors.privateoffset - local unknown = format("%04X",utfbyte("?")) local unicodevector = fonts.encodings.agl.unicodes -- loaded runtime in context - local tounicode = { } - local originals = { } - resources.tounicode = tounicode - resources.originals = originals + ----- namevector = fonts.encodings.agl.names -- loaded runtime in context + local missing = { } local lumunic, uparser, oparser local cidinfo, cidnames, cidcodes, usedmap - if false then -- will become an option - lumunic = loadlumtable(filename) - lumunic = lumunic and lumunic.tounicode - end -- cidinfo = properties.cidinfo usedmap = cidinfo and fonts.cid.getmap(cidinfo) @@ -212,12 +255,16 @@ function mappings.addtounicode(data,filename) for unic, glyph in next, descriptions do local index = glyph.index local name = glyph.name - if unic == -1 or unic >= private or (unic >= 0xE000 and unic <= 0xF8FF) or unic == 0xFFFE or unic == 0xFFFF then + local r = overloads[name] + if r then + -- get rid of weird ligatures + -- glyph.name = r.name + glyph.unicode = r.unicode + elseif unic == -1 or unic >= private or (unic >= 0xE000 and unic <= 0xF8FF) or unic == 0xFFFE or unic == 0xFFFF then local unicode = lumunic and lumunic[name] or unicodevector[name] if unicode then - originals[index] = unicode - tounicode[index] = tounicode16(unicode,name) - ns = ns + 1 + glyph.unicode = unicode + ns = ns + 1 end -- cidmap heuristics, beware, there is no guarantee for a match unless -- the chain resolves @@ -226,9 +273,8 @@ function mappings.addtounicode(data,filename) if foundindex then unicode = cidcodes[foundindex] -- name to number if unicode then - originals[index] = unicode - tounicode[index] = tounicode16(unicode,name) - ns = ns + 1 + glyph.unicode = unicode + ns = ns + 1 else local reference = cidnames[foundindex] -- number to name if reference then @@ -236,23 +282,20 @@ function mappings.addtounicode(data,filename) if foundindex then unicode = cidcodes[foundindex] if unicode then - originals[index] = unicode - tounicode[index] = tounicode16(unicode,name) - ns = ns + 1 + glyph.unicode = unicode + ns = ns + 1 end end if not unicode or unicode == "" then local foundcodes, multiple = lpegmatch(uparser,reference) if foundcodes then - originals[index] = foundcodes + glyph.unicode = foundcodes if multiple then - tounicode[index] = tounicode16sequence(foundcodes) - nl = nl + 1 - unicode = true + nl = nl + 1 + unicode = true else - tounicode[index] = tounicode16(foundcodes,name) - ns = ns + 1 - unicode = foundcodes + ns = ns + 1 + unicode = foundcodes end end end @@ -299,11 +342,9 @@ function mappings.addtounicode(data,filename) if n == 0 then -- done then -- nothing elseif n == 1 then - originals[index] = t[1] - tounicode[index] = tounicode16(t[1],name) + glyph.unicode = t[1] else - originals[index] = t - tounicode[index] = tounicode16sequence(t) + glyph.unicode = t end nl = nl + 1 end @@ -311,32 +352,163 @@ function mappings.addtounicode(data,filename) if not unicode or unicode == "" then local foundcodes, multiple = lpegmatch(uparser,name) if foundcodes then + glyph.unicode = foundcodes if multiple then - originals[index] = foundcodes - tounicode[index] = tounicode16sequence(foundcodes,name) - nl = nl + 1 - unicode = true + nl = nl + 1 + unicode = true else - originals[index] = foundcodes - tounicode[index] = tounicode16(foundcodes,name) - ns = ns + 1 - unicode = foundcodes + ns = ns + 1 + unicode = foundcodes end end end - -- if not unicode then - -- originals[index] = 0xFFFD - -- tounicode[index] = "FFFD" + -- check using substitutes and alternates + local r = overloads[unicode] + if r then + unicode = r.unicode + glyph.unicode = unicode + end + -- + if not unicode then + missing[name] = true + end + end + end + if next(missing) then + local guess = { } + -- helper + local function check(gname,code,unicode) + local description = descriptions[code] + -- no need to add a self reference + local variant = description.name + if variant == gname then + return + end + -- the variant already has a unicode (normally that resultrs in a default tounicode to self) + local unic = unicodes[variant] + if unic == -1 or unic >= private or (unic >= 0xE000 and unic <= 0xF8FF) or unic == 0xFFFE or unic == 0xFFFF then + -- no default mapping and therefore maybe no tounicode yet + else + return + end + -- the variant already has a tounicode + if descriptions[code].unicode then + return + end + -- add to the list + local g = guess[variant] + -- local r = overloads[unicode] + -- if r then + -- unicode = r.unicode -- end + if g then + g[gname] = unicode + else + guess[variant] = { [gname] = unicode } + end + end + -- + for unicode, description in next, descriptions do + local slookups = description.slookups + if slookups then + local gname = description.name + for tag, data in next, slookups do + local lookuptype = lookuptypes[tag] + if lookuptype == "alternate" then + for i=1,#data do + check(gname,data[i],unicode) + end + elseif lookuptype == "substitution" then + check(gname,data,unicode) + end + end + end + local mlookups = description.mlookups + if mlookups then + local gname = description.name + for tag, list in next, mlookups do + local lookuptype = lookuptypes[tag] + if lookuptype == "alternate" then + for i=1,#list do + local data = list[i] + for i=1,#data do + check(gname,data[i],unicode) + end + end + elseif lookuptype == "substitution" then + for i=1,#list do + check(gname,list[i],unicode) + end + end + end + end + end + -- resolve references + local done = true + while done do + done = false + for k, v in next, guess do + if type(v) ~= "number" then + for kk, vv in next, v do + if vv == -1 or vv >= private or (vv >= 0xE000 and vv <= 0xF8FF) or vv == 0xFFFE or vv == 0xFFFF then + local uu = guess[kk] + if type(uu) == "number" then + guess[k] = uu + done = true + end + else + guess[k] = vv + done = true + end + end + end + end + end + -- wrap up + local orphans = 0 + local guessed = 0 + for k, v in next, guess do + if type(v) == "number" then + descriptions[unicodes[k]].unicode = descriptions[v].unicode or v -- can also be a table + guessed = guessed + 1 + else + local t = nil + local l = lower(k) + local u = unicodes[l] + if not u then + orphans = orphans + 1 + elseif u == -1 or u >= private or (u >= 0xE000 and u <= 0xF8FF) or u == 0xFFFE or u == 0xFFFF then + local unicode = descriptions[u].unicode + if unicode then + descriptions[unicodes[k]].unicode = unicode + guessed = guessed + 1 + else + orphans = orphans + 1 + end + else + orphans = orphans + 1 + end + end + end + if trace_loading and orphans > 0 or guessed > 0 then + report_fonts("%s glyphs with no related unicode, %s guessed, %s orphans",guessed+orphans,guessed,orphans) end end if trace_mapping then for unic, glyph in table.sortedhash(descriptions) do - local name = glyph.name - local index = glyph.index - local toun = tounicode[index] - if toun then - report_fonts("internal slot %U, name %a, unicode %U, tounicode %a",index,name,unic,toun) + local name = glyph.name + local index = glyph.index + local unicode = glyph.unicode + if unicode then + if type(unicode) == "table" then + local unicodes = { } + for i=1,#unicode do + unicodes[i] = formatters("%U",unicode[i]) + end + report_fonts("internal slot %U, name %a, unicode %U, tounicode % t",index,name,unic,unicodes) + else + report_fonts("internal slot %U, name %a, unicode %U, tounicode %U",index,name,unic,unicode) + end else report_fonts("internal slot %U, name %a, unicode %U",index,name,unic) end @@ -346,3 +518,18 @@ function mappings.addtounicode(data,filename) report_fonts("%s tounicode entries added, ligatures %s",nl+ns,ns) end end + +-- local parser = makenameparser("Japan1") +-- local parser = makenameparser() +-- local function test(str) +-- local b, a = lpegmatch(parser,str) +-- print((a and table.serialize(b)) or b) +-- end +-- test("a.sc") +-- test("a") +-- test("uni1234") +-- test("uni1234.xx") +-- test("uni12349876") +-- test("u123400987600") +-- test("index1234") +-- test("Japan1.123") |