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|
if not modules then modules = { } end modules ['lang-ini'] = {
version = 1.001,
comment = "companion to lang-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- needs a cleanup (share locals)
-- discard language when redefined
-- 002D : hyphen-minus (ascii)
-- 002D : hyphen-minus (ascii)
-- 2010 : hyphen
-- 2011 : nonbreakable hyphen
-- 2013 : endash (compound hyphen)
-- todo: no foo:bar but foo(bar,...)
-- https://wortschatz.uni-leipzig.de/de/download/German : lots of lists
local type, tonumber, next = type, tonumber, next
local utfbyte, utflength = utf.byte, utf.length
local format, gsub, gmatch, find = string.format, string.gsub, string.gmatch, string.find
local concat, sortedkeys, sortedhash, keys, insert, tohash = table.concat, table.sortedkeys, table.sortedhash, table.keys, table.insert, table.tohash
local setmetatableindex = table.setmetatableindex
local utfvalues, strip, utfcharacters = string.utfvalues, string.strip, utf.characters
local context = context
local commands = commands
local implement = interfaces.implement
local settings_to_array = utilities.parsers.settings_to_array
local settings_to_set = utilities.parsers.settings_to_set
local trace_patterns = false trackers.register("languages.patterns", function(v) trace_patterns = v end)
local trace_goodies = false trackers.register("languages.goodies", function(v) trace_goodies = v end)
local trace_applied = false trackers.register("languages.applied", function(v) trace_applied = v end)
local report_initialization = logs.reporter("languages","initialization")
local report_goodies = logs.reporter("languages","goodies")
local prehyphenchar = language.prehyphenchar -- global per language
local posthyphenchar = language.posthyphenchar -- global per language
local preexhyphenchar = language.preexhyphenchar -- global per language
local postexhyphenchar = language.postexhyphenchar -- global per language
----- lefthyphenmin = language.lefthyphenmin
----- righthyphenmin = language.righthyphenmin
local sethjcode = language.sethjcode
local currentlanguage = language.current -- or function() return tex.normallanguage or tex.language end
local uccodes = characters.uccodes
local lccodes = characters.lccodes
local new_language = language.new
languages = languages or {}
local languages = languages
languages.version = 1.010
languages.registered = languages.registered or { }
local registered = languages.registered
languages.associated = languages.associated or { }
local associated = languages.associated
languages.numbers = languages.numbers or { }
local numbers = languages.numbers
languages.data = languages.data or { }
local data = languages.data
storage.register("languages/registered",registered,"languages.registered")
storage.register("languages/associated",associated,"languages.associated")
storage.register("languages/numbers", numbers, "languages.numbers")
storage.register("languages/data", data, "languages.data")
local variables = interfaces.variables
local v_reset = variables.reset
local v_yes = variables.yes
local nofloaded = 0
local function resolve(tag)
local data, instance = registered[tag], nil
if data then
instance = data.instance
if not instance then
instance = new_language(data.number)
data.instance = instance
end
end
return data, instance
end
local function tolang(what) -- returns lang object
if not what then
what = currentlanguage()
end
if type(what) == "userdata" then
return what
end
local tag = numbers[what]
local data = tag and registered[tag] or registered[what]
if data then
local instance = data.instance -- .lang -- was this ok ?
if not instance then
instance = new_language(data.number)
data.instance = instance
end
return instance
end
end
function languages.getdata(tag) -- or number
if tag then
return registered[tag] or registered[numbers[tag]]
else
return registered[numbers[currentlanguage()]]
end
end
languages.tolang = tolang
-- patterns=en
-- patterns=en,de
local function validdata(loaded,what,tag)
local dataset = loaded[what]
if dataset then
local data = dataset.data
if not data or data == "" then
-- nothing
elseif dataset.compression == "zlib" then
data = zlib.decompress(data)
if dataset.length and dataset.length ~= #data then
report_initialization("compression error in %a for language %a","patterns",what,tag)
end
return data
else
return data
end
end
end
-- languages.hjcounts[unicode].count
-- hjcode: 0 not to be hyphenated
-- 1--31 length
-- 32 zero length
-- > 32 hyphenated with length 1
local function sethjcodes(instance,loaded,what,factor)
local l = loaded[what]
local c = l and l.characters
if c then
local hjcounts = factor and languages.hjcounts or false
--
local h = loaded.codehash
if not h then
h = { }
loaded.codehash = h
end
--
local function setcode(l)
local u = uccodes[l]
local s = l
if hjcounts then
local c = hjcounts[l]
if c then
c = c.count
if not c then
-- error, keep as 1
elseif c <= 0 then
-- counts as 0 i.e. ignored
s = 32
elseif c >= 31 then
-- counts as 31
s = 31
else
-- count c times
s = c
end
end
end
sethjcode(instance,l,s)
h[l] = s
if u ~= l and type(u) == "number" then
sethjcode(instance,u,s)
h[u] = lccodes[l]
end
end
--
local s = tex.savinghyphcodes
tex.savinghyphcodes = 0
if type(c) == "table" then
if #c > 0 then
-- list: { U, U, U, "chr", "chr", ... }
for i=1,#c do
local v = c[i]
setcode(type(v) == "string" and utfbyte(v) or v)
end
else
-- hash: { ["chr"] = true, ... }
for k, v in next, c do
if v then
setcode(utfbyte(k))
end
end
end
elseif type(c) == "string" then
for l in utfvalues(c) do
setcode(l)
end
end
tex.savinghyphcodes = s
end
end
local function addhjcodestoinstance(instance,characters)
if type(characters) == "table" then
local nofcharacters = #characters
if nofcharacters > 0 then
-- list: { U, U, U, "chr", "chr", ... }
for i=1,nofcharacters do
local v = characters[i]
local h = type(v) == "string" and utfbyte(v) or v
sethjcode(instance,h,h)
end
else
-- hash: { ["chr"] = true, ... }
for k, v in next, characters do
if v then
local h = type(k) == "string" and utfbyte(k) or k
sethjcode(instance,h,h)
end
end
end
elseif type(characters) == "string" then
for h in utfvalues(characters) do
sethjcode(instance,h,h)
end
end
end
-- 2'2 conflicts with 4' ... and luatex barks on it
local P, S, R, C, Cs, Ct, lpegmatch, lpegpatterns = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Cs, lpeg.Ct, lpeg.match, lpeg.patterns
local utfsplit = utf.split
local space = lpegpatterns.space
local whitespace = lpegpatterns.whitespace^1
local nospace = lpegpatterns.utf8char - whitespace
local digit = lpegpatterns.digit
----- endofstring = #whitespace + P(-1)
local endofstring = #whitespace
local word = (digit/"")^0 * (digit/"" * endofstring + digit/" " + nospace)^1
local anyword = (1-whitespace)^1
local analyze = Ct((whitespace + Cs(word))^1)
local function unique(tag,requested,loaded)
local nofloaded = #loaded
if nofloaded == 0 then
return ""
elseif nofloaded == 1 then
return loaded[1]
else
insert(loaded,1," ") -- no need then for special first word
-- insert(loaded, " ")
loaded = concat(loaded," ")
local t = lpegmatch(analyze,loaded) or { }
local h = { }
local b = { }
for i=1,#t do
local ti = t[i]
local hi = h[ti]
if not hi then
h[ti] = 1
elseif hi == 1 then
h[ti] = 2
b[#b+1] = utfsplit(ti," ")
end
end
-- sort
local nofbad = #b
if nofbad > 0 then
local word
for i=1,nofbad do
local bi = b[i]
local p = P(bi[1])
for i=2,#bi do
p = p * digit * P(bi[i])
end
if word then
word = word + p
else
word = p
end
report_initialization("language %a, patterns %a, discarding conflict (0-9)%{[0-9]}t(0-9)",tag,requested,bi)
end
t, h, b = nil, nil, nil -- permit gc
local someword = digit^0 * word * digit^0 * endofstring / ""
-- local strip = Cs(someword^-1 * (someword + anyword + whitespace)^1)
local strip = Cs((someword + anyword + whitespace)^1)
return lpegmatch(strip,loaded) or loaded
else
return loaded
end
end
end
local shared = false
local function loaddefinitions(tag,specification)
statistics.starttiming(languages)
local data, instance = resolve(tag)
local requested = specification.patterns or ""
local definitions = settings_to_array(requested)
if #definitions > 0 then
if trace_patterns then
report_initialization("pattern specification for language %a: %s",tag,specification.patterns)
end
local ploaded = instance:patterns()
local eloaded = instance:hyphenation()
if not ploaded or ploaded == "" then
ploaded = { }
else
ploaded = { ploaded }
end
if not eloaded or eloaded == "" then
eloaded = { }
else
eloaded = { eloaded }
end
local dataused = data.used
local ok = false
local resources = data.resources or { }
data.resources = resources
if not shared then
local found = resolvers.findfile("lang-exc.lua")
if found then
shared = dofile(found)
if type(shared) == "table" then
shared = concat(shared," ")
else
shared = true
end
else
shared = true
end
end
for i=1,#definitions do
local definition = definitions[i]
if definition == "" then
-- error
elseif definition == v_reset then
if trace_patterns then
report_initialization("clearing patterns for language %a",tag)
end
instance:clearpatterns()
instance:clearhyphenation()
ploaded = { }
eloaded = { }
elseif not dataused[definition] then
dataused[definition] = definition
local filename = "lang-" .. definition .. ".lua"
local fullname = resolvers.findfile(filename) or ""
if fullname == "" then
fullname = resolvers.findfile(filename .. ".gz") or ""
end
if fullname ~= "" then
if trace_patterns then
report_initialization("loading definition %a for language %a from %a",definition,tag,fullname)
end
local suffix, gzipped = gzip.suffix(fullname)
local loaded = table.load(fullname,gzipped and gzip.load)
if loaded then -- todo: version test
ok, nofloaded = true, nofloaded + 1
sethjcodes(instance,loaded,"patterns",specification.factor)
sethjcodes(instance,loaded,"exceptions",specification.factor)
local p = validdata(loaded,"patterns",tag)
local e = validdata(loaded,"exceptions",tag)
if p and p ~= "" then
ploaded[#ploaded+1] = p
end
if e and e ~= "" then
eloaded[#eloaded+1] = e
end
resources[#resources+1] = loaded -- so we can use them otherwise
else
report_initialization("invalid definition %a for language %a in %a",definition,tag,filename)
end
elseif trace_patterns then
report_initialization("invalid definition %a for language %a in %a",definition,tag,filename)
end
elseif trace_patterns then
report_initialization("definition %a for language %a already loaded",definition,tag)
end
end
if #ploaded > 0 then
-- why not always clear
instance:clearpatterns()
instance:patterns(unique(tag,requested,ploaded))
end
if #eloaded > 0 then
-- why not always clear
instance:clearhyphenation()
instance:hyphenation(concat(eloaded," "))
end
if type(shared) == "string" then
instance:hyphenation(shared)
end
return ok
elseif trace_patterns then
report_initialization("no definitions for language %a",tag)
end
statistics.stoptiming(languages)
end
storage.shared.noflanguages = storage.shared.noflanguages or 0
local noflanguages = storage.shared.noflanguages
function languages.define(tag,parent)
noflanguages = noflanguages + 1
if trace_patterns then
report_initialization("assigning number %a to %a",noflanguages,tag)
end
numbers[noflanguages] = tag
registered[tag] = {
tag = tag,
parent = parent or "",
patterns = "",
loaded = false,
used = { },
dirty = true,
number = noflanguages,
instance = nil, -- luatex data structure
synonyms = { },
}
storage.shared.noflanguages = noflanguages
end
function languages.setsynonym(synonym,tag) -- convenience function
local l = registered[tag]
if l then
l.synonyms[synonym] = true -- maybe some day more info
end
end
function languages.installed(separator)
return concat(sortedkeys(registered),separator or ",")
end
function languages.current(n)
return numbers[n and tonumber(n) or currentlanguage()]
end
function languages.associate(tag,script,language) -- not yet used
associated[tag] = { script, language }
end
function languages.association(tag) -- not yet used
if not tag then
tag = numbers[currentlanguage()]
elseif type(tag) == "number" then
tag = numbers[tag]
end
local lat = tag and associated[tag]
if lat then
return lat[1], lat[2]
end
end
function languages.loadable(tag,defaultlanguage) -- hack
local l = registered[tag] -- no synonyms
if l and resolvers.findfile("lang-"..l.patterns..".lua") then
return true
else
return false
end
end
-- a bit messy, we will do all language setting in lua as we can now assign
-- and 'patterns' will go away here.
function languages.unload(tag)
local l = registered[tag]
if l then
l.dirty = true
end
end
-- not that usefull, global values
function languages.prehyphenchar (what) return prehyphenchar (tolang(what)) end
function languages.posthyphenchar (what) return posthyphenchar (tolang(what)) end
function languages.preexhyphenchar (what) return preexhyphenchar (tolang(what)) end
function languages.postexhyphenchar(what) return postexhyphenchar(tolang(what)) end
-------- languages.lefthyphenmin (what) return lefthyphenmin (tolang(what)) end
-------- languages.righthyphenmin (what) return righthyphenmin (tolang(what)) end
-- e['implementer']= 'imple{m}{-}{-}menter'
-- e['manual'] = 'man{}{}{}'
-- e['as'] = 'a-s'
-- e['user-friendly'] = 'user=friend-ly'
-- e['exceptionally-friendly'] = 'excep-tionally=friend-ly'
local invalid = { "{", "}", "(", ")", "-", " " }
local function collecthjcodes(data,str)
local found = data.extras and data.extras.characters or { }
if type(str) == "string" then
for s in utfcharacters(str) do
if not found[s] then
found[s] = true
end
end
elseif type(str) == "table" then
for i=1,#str do
local s = str[i]
if not found[s] then
found[s] = true
end
end
end
for i=1,#invalid do -- less checks this way
local c = invalid[i]
if found[c] then
found[c] = nil
end
end
data.extras = { characters = found }
sethjcodes(data.instance,data,"extras",data.factor)
end
function languages.loadwords(tag,filename)
local data, instance = resolve(tag)
if data then
statistics.starttiming(languages)
local str = io.loaddata(filename) or ""
collecthjcodes(data,str)
instance:hyphenation(str)
statistics.stoptiming(languages)
end
end
function languages.setexceptions(tag,str)
local data, instance = resolve(tag)
if data then
str = strip(str) -- we need to strip leading spaces
collecthjcodes(data,str)
instance:hyphenation(str)
end
end
function languages.setpatterns(tag,str)
local data, instance = resolve(tag)
if data then
str = strip(str) -- we need to strip leading spaces
collecthjcodes(data,str)
instance:patterns(str)
end
end
local function setwordhandler(tag,action)
local data, instance = resolve(tag)
if data then
instance:setwordhandler(action)
end
end
languages.setwordhandler = setwordhandler
function languages.setoptions(tag,str)
languages.addgoodiesdata(tag,{ { words = str } })
-- for now:
languages.setgoodieshandler { tag = tag, goodies = tag }
end
function languages.hyphenate(tag,str)
-- todo: does this still work?
local data, instance = resolve(tag)
if data then
return instance:hyphenate(str)
else
return str
end
end
-- This code is here for some testing (and discussion) but it might end up in its
-- own module. I wrote it after listening to the end March 2021 live concert of
-- Mandoki Soulmates: Hungarian Pictures (music is the greatest unifier) with his
-- usual incredible international lineup. After that, and realizing that we needed
-- to deal better with some language issues as follow up on a mailing list thread, I
-- needed only a few loops of relistening the concert to implement it. In
-- restrospect this was a language feature that should have been there a while ago.
do
local nuts = nodes.nuts
local nextglyph = nuts.traversers.glyph
local setoptions = nuts.setoptions
local getnext = nuts.getnext
local getprev = nuts.getprev
local setchar = nuts.setchar
local setnext = nuts.setnext
local setlink = nuts.setlink
local setfield = nuts.setfield
local setdisc = nuts.setdisc
local getprop = nuts.getprop
local setprop = nuts.setprop
local setattrlist = nuts.setattrlist
local new_disc = nuts.pool.disc
local new_glyph = nuts.pool.glyph
local copy_node = nuts.copy
local flushlist = nuts.flushlist
local glyphoptioncodes = tex.glyphoptioncodes
local lower = characters.lower
local replacer = utf.replacer
local utfchartabletopattern = lpeg.utfchartabletopattern
local report = logs.reporter("languages","goodies")
-- can be shared
local goodiesdata = setmetatableindex(function(t,k)
local v = {
properties = { },
replacements = { },
characters = { },
exceptions = { },
}
t[k] = v
return v
end)
-- can be a helper
local compound_disc_code = tex.discoptioncodes.preword | tex.discoptioncodes.postword
local function setcompound(current,id,first,last,lh,rh,hyphen)
local prev = getprev(current)
-- local language = tolang(id)
-- local prechar = prehyphenchar(language)
-- local postchar = posthyphenchar(language)
local prechar = prehyphenchar(id)
local postchar = posthyphenchar(id)
local pre = prechar and copy_node(current)
local post = postchar and copy_node(current)
local replace = hyphen and prechar and copy_node(current)
local disc = new_disc()
if pre then
setchar(pre,prechar)
end
if post then
setchar(post,postchar)
end
if replace then
setchar(replace,prechar)
end
setattrlist(disc,current)
setoptions(disc,0x3) -- todo foo_code
setdisc(disc,pre,post,replace)
setlink(prev,disc,current)
if lh then
setfield(first,"rhmin",rh)
end
if rh then
setfield(current,"lhmin",lh)
end
end
local setcompounds = setmetatableindex(function(t,l)
local v = setmetatableindex(function(t,r)
local v = function(current,id,first,last) return setcompound(current,id,first,last,l,r) end
t[r] = v
return v
end)
t[l] = v
return v
end)
local sethyphens = setmetatableindex(function(t,l)
local v = setmetatableindex(function(t,r)
local v = function(current,id,first,last) return setcompound(current,id,first,last,l,r,true) end
t[r] = v
return v
end)
t[l] = v
return v
end)
local function replaceword(first,last,old,new,oldlen)
local oldlen = utflength(old)
local newlen = utflength(new)
if newlen == 0 then
-- forget about it
elseif newlen <= oldlen then
for s in utfvalues(new) do
setchar(first,s)
first = getnext(first)
end
if newlen < oldlen then
-- first is one ahead
local after = getnext(last)
local before = getprev(first)
setnext(last)
setlink(before,after)
flushlist(first)
end
else
local i = 0
local l = getnext(last)
for s in utfvalues(new) do
i = i + 1
if i > oldlen then
local g = copy_node(first)
setlink(first,g,l)
setchar(g,s)
first = g
elseif i == oldlen then
setchar(first,s)
else
setchar(first,s)
first = getnext(first)
end
end
end
end
-- local optioncodes = table.copy(glyphoptioncodes)
--
-- optioncodes.nokerns = optioncodes.noleftkern | optioncodes.norightkern
-- optioncodes.noligatures = optioncodes.noleftligature | optioncodes.norightligature
local lh, rh = false, false
local cache = setmetatableindex(function(t,k)
local v = 0
if k == "compound" then
v = setcompounds[lh][rh]
elseif k == "hyphen" then
v = sethyphens[lh][rh]
else
v = 0
for s in gmatch(k,"%w+") do
local o = glyphoptioncodes[s]
-- local o = optioncodes[s]
if o then
v = v | o
end
end
end
t[k] = v
return v
end)
local function checkglyphproperties(options)
-- we sort, just to be sure
for word, list in sortedhash(options) do
if type(list) == "string" then
options[word] = options[list]
else
for index, option in sortedhash(list) do
if type(option) == "string" then
list[index] = cache[option]
end
end
end
end
end
-- statistics.starttiming(languages)
-- statistics.stoptiming(languages)
-- 1: restart 2: exceptions+patterns 3: patterns *: next word
local sequencers = utilities.sequencers
local newsequencer = sequencers.new
local appendgroup = sequencers.appendgroup
local appendaction = sequencers.appendaction
local enableaction = sequencers.enableaction
local disableaction = sequencers.disableaction
local template = {
arguments = "s",
returnvalues = "r,i",
results = "r,i",
}
local registeredactions = setmetatableindex ( function(t,tag)
local actions = newsequencer(template)
appendgroup(actions,"user")
t[tag] = actions
return actions
end )
languages.registeredactions = registeredactions
function languages.installhandler(tag,func)
local todo = not rawget(registeredactions,tag)
local actions = registeredactions[tag]
appendaction(actions,"user",func)
enableaction(actions,func)
report("installing handler %a for language %a",func,tag)
if todo then
setwordhandler(tag,function(n,original,remapped,length,first,last)
local runner = actions.runner
if runner then
if getprop(first,"replaced") then
-- maybe some deadcycles
else
local r, result = runner(original)
if not r or original == r then
return result or 0
else
setprop(first,"replaced",true)
replaceword(first,last,original,r,length)
return 1
end
end
end
return 2
end)
end
end
local appliedoptions = setmetatableindex("table")
languages.appliedoptions = appliedoptions
languages.setgoodieshandler = function(specification) -- will become a table specifier
if type(specification) == "table" then
local tag = specification.tag
local goodies = specification.goodies or tag
local result = specification.result or 2
local data = goodiesdata[goodies]
local properties = data.properties
local replacements = data.replacements
local characters = data.characters
local exceptions = data.exceptions
local replacer = nil
local d, instance = resolve(tag)
local done = false
-- check if something at all
if type(characters) == "table" and characters and next(characters) then
addhjcodestoinstance(instance,characters)
if trace_goodies then
report_goodies("registering %a characters for %a",goodies,tag)
end
done = true
end
if type(properties) == "table" and next(properties) then
checkglyphproperties(properties) -- checks in place!
if trace_goodies then
report_goodies("registering %a properties for %a",goodies,tag)
end
done = true
end
if type(replacements) == "table" and next(replacements) then
replacer = Cs((utfchartabletopattern(replacements) / replacements + 1)^0)
if trace_goodies then
report_goodies("registering %a replacer for %a",goodies,tag)
end
done = true
end
if type(exceptions) == "table" and next(exceptions) then
done = true
else
exceptions = false
end
if done then
local registered = registeredactions[tag]
local applied = appliedoptions[tag]
setwordhandler(tag,function(n,original,remapped,length,first,last)
local runner = registered.runner
if runner then
if getprop(first,"replaced") then
-- maybe some deadcycles
else
local r, result = runner(original)
if not r then
if trace_goodies then
report_goodies("kept by runner: %s => %s, result %i",original,remapped, result or 0)
end
return result or 0
elseif original == r then
if result then
if trace_goodies then
report_goodies("kept by runner: %s => %s, result %i",original,remapped, result)
end
return result
else
if trace_goodies then
report_goodies("kept by runner: %s => %s, continue",original,remapped)
end
end
else
if trace_goodies then
report_goodies("replaced by runner: %s => %s => %s, restart",original,remapped,r)
end
setprop(first,"replaced",true)
replaceword(first,last,original,r,length)
return 1
end
end
end
local result = 2
local o = properties[remapped]
if o then
if trace_goodies then
report("properties: %s %s",original,remapped)
end
if trace_applied then
applied[original] = (applied[original] or 0) + 1
end
local index = 0
for g, c in nextglyph, first do
index = index + 1
local oi = o[index]
if oi then
if type(oi) == "function" then
oi(g,n,first,last) -- maybe return value
result = 1
else
setoptions(g,oi)
end
end
if g == last then
break
end
end
elseif replacer then
-- todo: check lengths so that we can avoid a check
if getprop(first,"replaced") then
-- maybe some deadcycles
else
local r = lpegmatch(replacer,original)
if original == r then
if trace_goodies then
report_goodies("kept: %s => %s",original,remapped)
end
else
if trace_goodies then
report_goodies("replaced: %s => %s => %s",original,remapped,r)
end
setprop(first,"replaced",true)
replaceword(first,last,original,r,length)
result = 1
end
end
elseif exceptions then
local exception = exceptions[original]
if exception then
if trace_goodies then
report_goodies("exception: %s => %s",original,exception)
end
result = exception
else
result = 3
end
else
if trace_goodies then
report_goodies("ignored: %s => %s",original,remapped)
end
end
return result
end)
elseif trace_goodies then
report_goodies("nothing useable in %a for %a",goodies,tag)
end
else
setwordhandler(tag)
end
end
local norightligature_option = glyphoptioncodes.norightligature
local noleftligature_option = glyphoptioncodes.noleftligature
local norightkern_option = glyphoptioncodes.norightkern
local noleftkern_option = glyphoptioncodes.noleftkern
local function applyaction(oc,v,n)
if oc == "noligature" then
if n > 0 then
local vv = v[n-1]
if vv then
v[n-1] = vv | norightligature_option
else
v[n-1] = norightligature_option
end
end
v[n] = noleftligature_option
elseif oc == "compound" then
if n > 1 then
-- v[n] = setcompound
v[n] = setcompounds[lh][rh]
return true
end
elseif oc == "hyphen" then
if n > 1 then
v[n] = sethyphens[lh][rh]
return true
end
elseif oc == "nokern" then
if n > 0 then
local vv = v[n-1]
if vv then
v[n-1] = vv | norightkern_option
else
v[n-1] = norightkern_option
end
end
v[n] = noleftkern_option
elseif oc == "noleftkern" then
v[n] = noleftkern_option
elseif oc == "norightkern" then
if n > 0 then
local vv = v[n-1]
if vv then
v[n-1] = vv | norightkern_option
else
v[n-1] = norightkern_option
end
end
else
for s in gmatch(oc,"%w+") do
if applyaction(s,v,n) then
return
end
end
end
end
-- a|b : a:norightligature b:noleftligature
-- a=b : a:norightkern b:noleftkern
-- a<b : b:noleftkern
-- a>b : a:norightkern
-- a-b : hyphen
-- a+b : compound
local actions = {
["|"] = "noligature",
["="] = "nokern",
["<"] = "noleftkern",
[">"] = "norightkern",
["+"] = "compound",
["-"] = "hyphen",
}
local function analyzed(m,a,t,k)
local v = { }
local n = 1
if m == true then
for c in gmatch(k,".") do
local ac = a[c]
if not ac then
n = n + 1
else
applyaction(ac,v,n)
end
end
elseif type(m) == "number" then
local i = 0
for c in gmatch(k,".") do
local ac = a[c]
if not ac then
n = n + 1
else
i = i + 1
if i == m then
applyaction(ac,v,n)
break
end
end
end
elseif type(m) == "table" then
-- happens here, otherwise no stable caching key, we could hash these too
m = tohash(m)
local i = 0
for c in gmatch(k,".") do
local ac = a[c]
if not ac then
n = n + 1
else
i = i + 1
if m[i] then
applyaction(ac,v,n)
end
end
end
else
-- error
end
t[k] = v
return v
end
local cache = setmetatableindex(function(t,m)
local v = setmetatableindex(function(t,a)
local v = setmetatableindex(function(t,k)
return analyzed(m,a,t,k)
end)
t[m] = v
return v
end)
t[m] = v
return v
end)
-- maybe also a skip symbol
local replace1 = Cs ( ( S("|=<>+-.0123456789")/"" + lpegpatterns.utf8character )^0 )
local replace2 = Cs ( ( S("|=<>+-.0123456789") + lpegpatterns.utf8character/".")^0 )
local function stripped(str)
-- todo : lpeg
str = gsub(str,"%-%-[^\n]*\n","")
str = gsub(str,"%%[^\n]*\n","")
str = gsub(str,"%s+"," ")
str = gsub(str,"^%s+","")
str = gsub(str,"%s+$","")
return str
end
local registerexceptions do
local lbrace = P("{")
local rbrace = P("}")
local lbracket = P("[")
local rbracket = P("]")
local lparent = P("(")
local rparent = P(")")
local hyphen = P("-")
local p = Cs ( (
lbrace * ((1-rbrace)^0) * rbrace
* lbrace * ((1-rbrace)^0) * rbrace
* lbrace * C((1-rbrace)^0) * rbrace * (lparent * C((1-rparent)^0) * rparent)^0 / function(a,b) return b or a end
+ (lbracket * (1-rbracket)^0 * rbracket) / ""
+ hyphen / ""
+ lpegpatterns.utf8character
)^0 )
registerexceptions = function(target,str)
local kind = type(str)
if kind == "string" then
for v in gmatch(stripped(str),"%S+") do
local k = lpegmatch(p,v)
if k ~= v then
target[k] = v
end
end
elseif kind == "table" then
local n = #str
if n > 0 then
for i=1,n do
local v = str[i]
local k = lpegmatch(p,v)
if k ~= v then
target[k] = v
end
end
else
-- maybe check for sanity
for k, v in next, str do
target[k] = v
end
end
end
end
end
function languages.strippedgoodiewords(str)
return lpegmatch(replace1,stripped(str))
end
local splitter = lpeg.tsplitat(" ")
local function addgoodies(tag,list,filename)
local np = 0
local nd = 0
local nw = 0
local nl = #list
--
local data = goodiesdata[tag]
local properties = data.properties
local replacements = data.replacements
local characters = data.characters
local exceptions = data.exceptions
if filename then
if not data.goodies then
data.goodies = { }
end
insert(data.goodies,filename)
end
--
lh = false
rh = false
--
for i=1,nl do
local l = list[i]
if type(l) == "table" then
local w = l.words
local p = l.patterns
local c = l.characters
local e = l.exceptions
lh = l.left or false -- for practical reasons these are semi-global
rh = l.right or false -- for practical reasons these are semi-global
if c then
for v in utfvalues(c) do
characters[v] = true
end
end
if w then
local prefixes = l.prefixes
local nofprefixes = 0
local suffixes = l.suffixes
local nofsuffixes = 0
if prefixes then
prefixes = lpegmatch(splitter,lower(stripped(prefixes)))
nofprefixes = #prefixes
end
if suffixes then
suffixes = lpegmatch(splitter,lower(stripped(suffixes)))
nofsuffixes = #suffixes
end
w = lower(stripped(w))
if p then
local pattern = Cs((utfchartabletopattern(p) / p + 1)^0)
w = lpegmatch(pattern,w)
np = np + 1
else
nd = nd + 1
end
local m = l.matches
if not m then
m = true
end
local a = l.actions
if a then
setmetatableindex(a,actions)
else
a = actions
end
local cach = cache[m][a]
if nofprefixes > 0 then
if nofsuffixes > 0 then
for wrd in gmatch(w,"%S+") do
properties[lpegmatch(replace1,wrd)] = cach[lpegmatch(replace2,wrd)]
nw = nw + 1
for i=1,nofprefixes do
local tmp = prefixes[i] .. wrd
for i=1,nofsuffixes do
local str = tmp .. suffixes[i]
properties[lpegmatch(replace1,str)] = cach[lpegmatch(replace2,str)]
nw = nw + 1
end
end
end
else
for wrd in gmatch(w,"%S+") do
properties[lpegmatch(replace1,wrd)] = cach[lpegmatch(replace2,wrd)]
nw = nw + 1
for i=1,nofprefixes do
local str = prefixes[i] .. wrd
properties[lpegmatch(replace1,str)] = cach[lpegmatch(replace2,str)]
nw = nw + 1
end
end
end
elseif nofsuffixes > 0 then
for wrd in gmatch(w,"%S+") do
properties[lpegmatch(replace1,wrd)] = cach[lpegmatch(replace2,wrd)]
nw = nw + 1
for i=1,nofsuffixes do
local str = wrd .. suffixes[i]
properties[lpegmatch(replace1,str)] = cach[lpegmatch(replace2,str)]
nw = nw + 1
end
end
else
for wrd in gmatch(w,"%S+") do
properties[lpegmatch(replace1,wrd)] = cach[lpegmatch(replace2,wrd)]
nw = nw + 1
end
end
elseif p then
for k, v in next, p do
-- todo: warning overload
replacements[k] = v
end
elseif e then
registerexceptions(exceptions,e)
end
end
end
lh = false
rh = false
return { np = np, nd = nd, nw = nw, nl = nl }
end
function languages.goodiefiles(tag)
local d = goodiesdata[tag]
return d and d.goodies
end
function languages.addgoodiesfile(tag,filename)
local fullname = resolvers.findfile(file.addsuffix(filename,"llg")) or ""
if fullname == "" then
report_goodies("file %a is not found",filename)
else
local list = table.load(fullname)
if not list then
report_goodies("file %a is invalid",fullname)
else
list = list.options
if not list then
report_goodies("file %a has no options",fullname)
else
local ok = addgoodies(tag,list,filename)
report_goodies("tag %a, file %a loaded, %i lists, %i via patterns, %i direct, %i words",
tag,fullname,ok.nl,ok.np,ok.nd,ok.nw)
end
end
end
end
function languages.addgoodiesdata(tag,list)
local ok = addgoodies(tag,list)
report_goodies("tag %a, data loaded, %i lists, %i via patterns, %i direct, %i words",
tag,ok.nl,ok.np,ok.nd,ok.nw)
end
end
if environment.initex then
function languages.getnumber()
return 0
end
else
function languages.getnumber(tag,default,patterns,goodies,factor)
local l = registered[tag]
if l then
if l.dirty then
l.factor = factor == v_yes and true or false
if trace_patterns then
report_initialization("checking patterns for %a with default %a",tag,default)
end
-- patterns is already resolved to parent patterns if applicable
if patterns and patterns ~= "" then
if l.patterns ~= patterns then
l.patterns = patterns
if trace_patterns then
report_initialization("loading patterns for %a using specification %a",tag,patterns)
end
loaddefinitions(tag,l)
else
-- unchanged
end
elseif l.patterns == "" then
l.patterns = tag
if trace_patterns then
report_initialization("loading patterns for %a using tag",tag)
end
local ok = loaddefinitions(tag,l)
if not ok and tag ~= default then
l.patterns = default
if trace_patterns then
report_initialization("loading patterns for %a using default",tag)
end
loaddefinitions(tag,l)
end
end
if goodies and goodies ~= "" then
goodies = settings_to_array(goodies)
for i=1,#goodies do
local goodie = goodies[i]
-- we can cache this but it doesn't pay off to do so
languages.addgoodiesfile(tag,goodie)
end
languages.setgoodieshandler {
tag = tag,
goodies = tag,
}
end
l.loaded = true
l.dirty = false
end
return l.number
else
return 0
end
end
numbers[0] = "null"
registered.null = {
number = 0,
instance = new_language(0),
}
end
-- hyphenation.define ("zerolanguage")
-- hyphenation.loadpatterns ("zerolanguage") -- else bug
-- hyphenation.loadexceptions("zerolanguage") -- else bug
languages.logger = languages.logger or { }
function languages.logger.report()
local result, r = { }, 0
for tag, l in sortedhash(registered) do
if l.loaded then
r = r + 1
result[r] = format("%s:%s:%s",tag,l.parent,l.number)
end
end
return r > 0 and concat(result," ") or "none"
end
-- must happen at the tex end .. will use lang-def.lua
languages.associate('en','latn','eng')
languages.associate('uk','latn','eng')
languages.associate('nl','latn','nld')
languages.associate('de','latn','deu')
languages.associate('fr','latn','fra')
statistics.register("loaded patterns", function()
local result = languages.logger.report()
if result ~= "none" then
-- return result
return format("%s, load time: %s",result,statistics.elapsedtime(languages))
end
end)
-- statistics.register("language load time", function()
-- -- often zero so we can merge that in the above
-- return statistics.elapsedseconds(languages, format(", nofpatterns: %s",nofloaded))
-- end)
-- interface
implement {
name = "languagenumber",
actions = { languages.getnumber, context },
arguments = "5 strings"
}
implement {
name = "installedlanguages",
actions = { languages.installed, context },
}
implement {
name = "definelanguage",
actions = languages.define,
arguments = "2 strings"
}
implement {
name = "setlanguagesynonym",
actions = languages.setsynonym,
arguments = "2 strings"
}
implement {
name = "unloadlanguage",
actions = languages.unload,
arguments = "string"
}
implement {
name = "setlanguageexceptions",
actions = languages.setexceptions,
arguments = "2 strings"
}
implement {
name = "setlanguagepatterns",
actions = languages.setpatterns,
arguments = "2 strings"
}
implement {
name = "setlanguageoptions",
actions = languages.setoptions,
arguments = "2 strings"
}
implement {
name = "currentprehyphenchar",
actions = function()
local c = prehyphenchar(tolang())
if c and c > 0 then
context.char(c)
end
end
}
implement {
name = "currentposthyphenchar",
actions = function()
local c = posthyphenchar(tolang())
if c and c > 0 then
context.char(c)
end
end
}
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