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|
if not modules then modules = { } end modules ['bibl-bib'] = {
version = 1.001,
comment = "this module is the basis for the lxml-* ones",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[ldx--
<p>This is a prelude to integrated bibliography support. This file just loads
bibtex files and converts them to xml so that the we access the content
in a convenient way. Actually handling the data takes place elsewhere.</p>
--ldx]]--
local utf = unicode.utf8
local lower, format, gsub, concat = string.lower, string.format, string.gsub, table.concat
local next = next
local utfchar = utf.char
local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
local textoutf = characters and characters.tex.toutf
local variables = interfaces and interfaces.variables
local settings_to_hash = utilities.parsers.settings_to_hash
local finalizers = xml.finalizers.tex
local xmlfilter, xmltext, getid = xml.filter, xml.text, lxml.getid
local P, R, S, C, Cc, Cs, Ct = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cc, lpeg.Cs, lpeg.Ct
local trace_bibxml = false trackers.register("publications.bibxml", function(v) trace_bibtex = v end)
local report_xml = logs.reporter("publications","xml")
bibtex = bibtex or { }
local bibtex = bibtex
bibtex.statistics = bibtex.statistics or { }
local bibtexstats = bibtex.statistics
bibtexstats.nofbytes = 0
bibtexstats.nofdefinitions = 0
bibtexstats.nofshortcuts = 0
local defaultshortcuts = {
jan = "1",
feb = "2",
mar = "3",
apr = "4",
may = "5",
jun = "6",
jul = "7",
aug = "8",
sep = "9",
oct = "10",
nov = "11",
dec = "12",
}
local shortcuts = { }
local data = { }
local entries
-- Currently we expand shortcuts and for large ones (like the acknowledgements
-- in tugboat.bib this is not that efficient. However, eventually strings get
-- hashed again.
local function do_shortcut(tag,key,value)
bibtexstats.nofshortcuts = bibtexstats.nofshortcuts + 1
if lower(tag) == "@string" then
shortcuts[key] = value
end
end
local function do_definition(tag,key,tab) -- maybe check entries here (saves memory)
if not entries or entries[key] then
bibtexstats.nofdefinitions = bibtexstats.nofdefinitions + 1
local t = { }
for i=1,#tab,2 do
t[tab[i]] = tab[i+1]
end
local p = data[tag]
if not p then
data[tag] = { [key] = t }
else
p[key] = t
end
end
end
local function resolve(s)
return shortcuts[s] or defaultshortcuts[s] or s -- can be number
end
local percent = P("%")
local start = P("@")
local comma = P(",")
local hash = P("#")
local escape = P("\\")
local single = P("'")
local double = P('"')
local left = P('{')
local right = P('}')
local both = left + right
local lineending = S("\n\r")
local space = S(" \t\n\r\f")
local spacing = space^0
local equal = P("=")
local collapsed = (space^1)/ " "
local function add(a,b) if b then return a..b else return a end end
local keyword = C((R("az","AZ","09") + S("@_:-"))^1) -- C((1-space)^1)
local s_quoted = ((escape*single) + collapsed + (1-single))^0
local d_quoted = ((escape*double) + collapsed + (1-double))^0
local balanced = lpegpatterns.balanced
local s_value = (single/"") * s_quoted * (single/"")
local d_value = (double/"") * d_quoted * (double/"")
local b_value = (left /"") * balanced * (right /"")
local r_value = keyword/resolve
local somevalue = s_value + d_value + b_value + r_value
local value = Cs((somevalue * ((spacing * hash * spacing)/"" * somevalue)^0))
local assignment = spacing * keyword * spacing * equal * spacing * value * spacing
local shortcut = keyword * spacing * left * spacing * (assignment * comma^0)^0 * spacing * right
local definition = keyword * spacing * left * spacing * keyword * comma * Ct((assignment * comma^0)^0) * spacing * right
local comment = keyword * spacing * left * (1-right)^0 * spacing * right
local forget = percent^1 * (1-lineending)^0
-- todo \%
local grammar = (space + forget + shortcut/do_shortcut + definition/do_definition + comment + 1)^0
function bibtex.convert(session,content)
statistics.starttiming(bibtex)
data, shortcuts, entries = session.data, session.shortcuts, session.entries
bibtexstats.nofbytes = bibtexstats.nofbytes + #content
session.nofbytes = session.nofbytes + #content
lpegmatch(grammar,content or "")
statistics.stoptiming(bibtex)
end
function bibtex.load(session,filename)
local filename = resolvers.findfile(filename,"bib")
if filename ~= "" then
local data = io.loaddata(filename) or ""
if data == "" then
report_xml("empty file '%s', no conversion to xml",filename)
elseif trace_bibxml then
report_xml("converting file '%s' to xml",filename)
end
bibtex.convert(session,data)
end
end
function bibtex.new()
return {
data = { },
shortcuts = { },
xml = xml.convert("<?xml version='1.0' standalone='yes'?>\n<bibtex></bibtex>"),
nofbytes = 0,
entries = nil,
loaded = false,
}
end
local escaped_pattern = lpegpatterns.xml.escaped
local ihatethis = {
f = "\\f",
n = "\\n",
r = "\\r",
s = "\\s",
t = "\\t",
v = "\\v",
z = "\\z",
}
local command = P("\\")/"" * Cc("\\bibtexcommand{") * (R("az","AZ")^1) * Cc("}")
local any = P(1)
local done = P(-1)
local one_l = P("{") / ""
local one_r = P("}") / ""
local two_l = P("{{") / ""
local two_r = P("}}") / ""
local filter = Cs(
two_l * (command + any - two_r - done)^0 * two_r * done +
one_l * (command + any - one_r - done)^0 * one_r * done +
(command + any )^0
)
function bibtex.toxml(session,options)
if session.loaded then
return
else
session.loaded = true
end
-- we can always speed this up if needed
-- format slows down things a bit but who cares
statistics.starttiming(bibtex)
local result, r = { }, 0
local options = settings_to_hash(options)
local convert = options.convert -- todo: interface
local strip = options.strip -- todo: interface
local entries = session.entries
r = r + 1 ; result[r] = format("<?xml version='1.0' standalone='yes'?>")
r = r + 1 ; result[r] = format("<bibtex>")
for id, categories in next, session.data do
id = lower(gsub(id,"^@",""))
for name, entry in next, categories do
if not entries or entries[name] then
r = r + 1 ; result[r] = format("<entry tag='%s' category='%s'>",lower(name),id)
for key, value in next, entry do
value = gsub(value,"\\(.)",ihatethis)
value = lpegmatch(escaped_pattern,value)
if value ~= "" then
if convert then
value = textoutf(value,true)
end
if strip then
-- as there is no proper namespace in bibtex we need this
-- kind of hackery ... bibtex databases are quite unportable
value = lpegmatch(filter,value) or value
end
r = r + 1 ; result[r] = format(" <field name='%s'>%s</field>",key,value)
end
end
r = r + 1 ; result[r] = format("</entry>")
end
end
end
r = r + 1 ; result[r] = format("</bibtex>")
result = concat(result,"\n")
-- alternatively we could use lxml.convert
session.xml = xml.convert(result, {
resolve_entities = true,
resolve_predefined_entities = true, -- in case we have escaped entities
-- unify_predefined_entities = true, -- & -> &
utfize_entities = true,
} )
session.data = nil
session.shortcuts = nil
statistics.stoptiming(bibtex)
end
statistics.register("bibtex load time", function()
local nofbytes = bibtexstats.nofbytes
if nofbytes > 0 then
return format("%s seconds (%s bytes, %s definitions, %s shortcuts)",
statistics.elapsedtime(bibtex),nofbytes,bibtexstats.nofdefinitions,bibtexstats.nofshortcuts)
else
return nil
end
end)
--~ str = [[
--~ @COMMENT { CRAP }
--~ @STRING{ hans = "h a n s" }
--~ @STRING{ taco = "t a c o" }
--~ @SOMETHING{ key1, abc = "t a c o" , def = "h a n s" }
--~ @SOMETHING{ key2, abc = hans # taco }
--~ @SOMETHING{ key3, abc = "hans" # taco }
--~ @SOMETHING{ key4, abc = hans # "taco" }
--~ @SOMETHING{ key5, abc = hans # taco # "hans" # "taco"}
--~ @SOMETHING{ key6, abc = {oeps {oeps} oeps} }
--~ ]]
--~ local session = bibtex.new()
--~ bibtex.convert(session,str)
--~ bibtex.toxml(session)
--~ print(session.nofbytes,statistics.elapsedtime(bibtex))
--~ local session = bibtex.new()
--~ bibtex.load(session,"IEEEabrv.bib")
--~ bibtex.load(session,"IEEEfull.bib")
--~ bibtex.load(session,"IEEEexample.bib")
--~ bibtex.toxml(session)
--~ print(session.nofbytes,statistics.elapsedtime(bibtex))
--~ local session = bibtex.new()
--~ bibtex.load(session,"gut.bib")
--~ bibtex.load(session,"komoedie.bib")
--~ bibtex.load(session,"texbook1.bib")
--~ bibtex.load(session,"texbook2.bib")
--~ bibtex.load(session,"texbook3.bib")
--~ bibtex.load(session,"texgraph.bib")
--~ bibtex.load(session,"texjourn.bib")
--~ bibtex.load(session,"texnique.bib")
--~ bibtex.load(session,"tugboat.bib")
--~ bibtex.toxml(session)
--~ print(session.nofbytes,statistics.elapsedtime(bibtex))
--~ print(table.serialize(session.data))
--~ print(table.serialize(session.shortcuts))
--~ print(xml.serialize(session.xml))
if not characters then dofile(resolvers.findfile("char-def.lua")) end
local chardata = characters.data
local concat = table.concat
local lpeg = lpeg
local P, Ct, lpegmatch, lpegpatterns = lpeg.P, lpeg.Ct, lpeg.match, lpeg.patterns
local space, comma = P(" "), P(",")
local andsplitter = lpeg.tsplitat(space^1 * "and" * space^1)
local commasplitter = lpeg.tsplitat(space^0 * comma * space^0)
local spacesplitter = lpeg.tsplitat(space^1)
local firstcharacter = lpegpatterns.utf8byte
local function is_upper(str)
local first = lpegmatch(firstcharacter,str)
local okay = chardata[first]
return okay and okay.category == "lu"
end
local function splitauthors(str)
local authors = lpegmatch(andsplitter,str)
for i=1,#authors do
local firstnames, vons, surnames, initials, juniors, words
local author = authors[i]
local split = lpegmatch(commasplitter,author)
local n = #split
if n == 1 then
--~ First von Last
words = lpegmatch(spacesplitter,author)
firstnames, vons, surnames = { }, { }, { }
local i, n = 1, #words
while i <= n do
local w = words[i]
if is_upper(w) then
firstnames[#firstnames+1], i = w, i + 1
else
break
end
end
while i <= n do
local w = words[i]
if is_upper(w) then
break
else
vons[#vons+1], i = w, i + 1
end
end
while i <= n do
surnames[#surnames+1], i = words[i], i + 1
end
elseif n == 2 then
--~ von Last, First
words = lpegmatch(spacesplitter,split[2])
surnames = lpegmatch(spacesplitter,split[1])
firstnames, vons = { }, { }
local i, n = 1, #words
while i <= n do
local w = words[i]
if is_upper(w) then
firstnames[#firstnames+1], i = w, i + 1
else
break
end
end
while i <= n do
vons[#vons+1], i = words[i], i + 1
end
else
--~ von Last, Jr ,First
firstnames = lpegmatch(spacesplitter,split[1])
juniors = lpegmatch(spacesplitter,split[2])
surnames = lpegmatch(spacesplitter,split[3])
if n > 3 then
-- error
end
end
if #surnames == 0 then
surnames[1] = firstnames[#firstnames]
firstnames[#firstnames] = nil
end
if firstnames then
initials = { }
for i=1,#firstnames do
initials[i] = utfchar(lpegmatch(firstcharacter,firstnames[i]))
end
end
authors[i] = {
original = author,
firstnames = firstnames,
vons = vons,
surnames = surnames,
initials = initials,
juniors = juniors,
}
end
authors.original = str
return authors
end
local function the_initials(initials,symbol)
local t, symbol = { }, symbol or "."
for i=1,#initials do
t[i] = initials[i] .. symbol
end
return t
end
-- authors
bibtex.authors = bibtex.authors or { }
local authors = bibtex.authors
local defaultsettings = {
firstnamesep = " ",
vonsep = " ",
surnamesep = " ",
juniorsep = " ",
surnamejuniorsep = ", ",
juniorjuniorsep = ", ",
surnamefirstnamesep = ", ",
surnameinitialsep = ", ",
namesep = ", ",
lastnamesep = " and ",
finalnamesep = " and ",
}
function authors.normal(author,settings)
local firstnames, vons, surnames, juniors = author.firstnames, author.vons, author.surnames, author.juniors
local result, settings = { }, settings or defaultsettings
if firstnames and #firstnames > 0 then
result[#result+1] = concat(firstnames," ")
result[#result+1] = settings.firstnamesep or defaultsettings.firstnamesep
end
if vons and #vons > 0 then
result[#result+1] = concat(vons," ")
result[#result+1] = settings.vonsep or defaultsettings.vonsep
end
if surnames then
result[#result+1] = concat(surnames," ")
end
if juniors and #juniors > 0 then
result[#result+1] = concat(juniors," ")
result[#result+1] = settings.surnamesep or defaultsettings.surnamesep
end
return concat(result)
end
function authors.normalshort(author,settings)
local firstnames, vons, surnames, juniors = author.firstnames, author.vons, author.surnames, author.juniors
local result, settings = { }, settings or defaultsettings
if firstnames and #firstnames > 0 then
result[#result+1] = concat(firstnames," ")
result[#result+1] = settings.firstnamesep or defaultsettings.firstnamesep
end
if vons and #vons > 0 then
result[#result+1] = concat(vons," ")
result[#result+1] = settings.vonsep or defaultsettings.vonsep
end
if surnames then
result[#result+1] = concat(surnames," ")
end
if juniors and #juniors > 0 then
result[#result+1] = concat(juniors," ")
result[#result+1] = settings.surnamejuniorsep or defaultsettings.surnamejuniorsep
end
return concat(result)
end
function authors.inverted(author,settings)
local firstnames, vons, surnames, juniors = author.firstnames, author.vons, author.surnames, author.juniors
local result, settings = { }, settings or defaultsettings
if vons and #vons > 0 then
result[#result+1] = concat(vons," ")
result[#result+1] = settings.vonsep or defaultsettings.vonsep
end
if surnames then
result[#result+1] = concat(surnames," ")
end
if juniors and #juniors > 0 then
result[#result+1] = settings.juniorjuniorsep or defaultsettings.juniorjuniorsep
result[#result+1] = concat(juniors," ")
end
if firstnames and #firstnames > 0 then
result[#result+1] = settings.surnamefirstnamesep or defaultsettings.surnamefirstnamesep
result[#result+1] = concat(firstnames," ")
end
return concat(result)
end
function authors.invertedshort(author,settings)
local vons, surnames, initials, juniors = author.vons, author.surnames, author.initials, author.juniors
local result, settings = { }, settings or defaultsettings
if vons and #vons > 0 then
result[#result+1] = concat(vons," ")
result[#result+1] = settings.vonsep or defaultsettings.vonsep
end
if surnames then
result[#result+1] = concat(surnames," ")
end
if juniors and #juniors > 0 then
result[#result+1] = settings.juniorjuniorsep or defaultsettings.juniorjuniorsep
result[#result+1] = concat(juniors," ")
end
if initials and #initials > 0 then
result[#result+1] = settings.surnameinitialsep or defaultsettings.surnameinitialsep
result[#result+1] = concat(the_initials(initials)," ")
end
return concat(result)
end
local lastconcatsize = 1
local function bibtexconcat(t,settings)
local namesep = settings.namesep or defaultsettings.namesep or ", "
local lastnamesep = settings.lastnamesep or defaultsettings.lastnamesep or namesep
local finalnamesep = settings.finalnamesep or defaultsettings.finalnamesep or lastnamesep
local lastconcatsize = #t
if lastconcatsize > 2 then
local s = { }
for i=1,lastconcatsize-2 do
s[i] = t[i] .. namesep
end
s[lastconcatsize-1], s[lastconcatsize] = t[lastconcatsize-1] .. finalnamesep, t[lastconcatsize]
return concat(s)
elseif lastconcatsize > 1 then
return concat(t,lastnamesep)
elseif lastconcatsize > 0 then
return t[1]
else
return ""
end
end
function authors.concat(author,combiner,what,settings)
if type(combiner) == "string" then
combiner = authors[combiner or "normal"] or authors.normal
end
local split = splitauthors(author)
local setting = settings[what]
local etallimit, etaldisplay, etaltext = 1000, 1000, ""
if setting then
etallimit = settings.etallimit or 1000
etaldisplay = settings.etaldisplay or etallimit
etalltext = settings.etaltext or ""
end
local max = #split
if max > etallimit and etaldisplay < max then
max = etaldisplay
end
for i=1,max do
split[i] = combiner(split[i],settings)
end
local result = bibtexconcat(split,settings)
if max < #split then
return result
else
return result .. etaltext
end
end
function authors.short(author,year)
local result = { }
if author then
local authors = splitauthors(author)
for a=1,#authors do
local aa = authors[a]
local initials = aa.initials
for i=1,#initials do
result[#result+1] = initials[i]
end
local surnames = aa.surnames
for s=1,#surnames do
result[#result+1] = utfchar(lpegmatch(firstcharacter,surnames[s]))
end
end
end
if year then
result[#result+1] = year
end
return concat(result)
end
-- We can consider creating a hashtable key -> entry but I wonder if
-- pays off.
local function collectauthoryears(id,list)
list = settings_to_hash(list)
id = getid(id)
local found = { }
for e in xml.collected(id,"/bibtex/entry") do
if list[e.at.tag] then
local year = xmlfilter(e,"xml:///field[@name='year']/text()")
local author = xmlfilter(e,"xml:///field[@name='author']/text()")
if author and year then
local a = found[author]
if not a then
a = { }
found[author] = a
end
local y = a[year]
if not y then
y = { }
a[year] = y
end
y[#y+1] = e
end
end
end
-- found = { author = { year_1 = { e1, e2, e3 } } }
local done = { }
for author, years in next, found do
local yrs = { }
for year, entries in next, years do
if subyears then
-- -- add letters to all entries of an author and if so shouldn't
-- -- we tag all years of an author as soon as we do this?
-- if #entries > 1 then
-- for i=1,#years do
-- local entry = years[i]
-- -- years[i] = year .. string.char(i + string.byte("0") - 1)
-- end
-- end
else
yrs[#yrs+1] = year
end
end
done[author] = yrs
end
return done
end
local method, settings = "normal", { }
function authors.setsettings(s)
settings = s or settings
end
if commands then
local sessions = { }
function commands.definebibtexsession(name)
sessions[name] = bibtex.new()
end
function commands.preparebibtexsession(name,xmlname,options)
bibtex.toxml(sessions[name],options)
lxml.register(xmlname,sessions[name].xml)
end
function commands.registerbibtexfile(name,filename)
bibtex.load(sessions[name],filename)
end
function commands.registerbibtexentry(name,entry)
local session = sessions[name]
local entries = session.entries
if not entries then
session.entries = { [entry] = true } -- here we can keep more info
else
entries[entry] = true
end
end
-- commands.bibtexconcat = bibtexconcat
-- finalizers can be rather dumb as we have just text and no embedded xml
function finalizers.bibtexconcat(collected,method,what)
if collected then
local author = collected[1].dt[1] or ""
if author ~= "" then
context(authors.concat(author,method,what,settings))
end
end
end
function finalizers.bibtexshort(collected)
if collected then
local c = collected[1]
local year = xmlfilter(c,"xml://field[@name='year']/text()")
local author = xmlfilter(c,"xml://field[@name='author']/text()")
context(authors.short(author,year))
end
end
-- experiment:
--~ -- alternative approach: keep data at the tex end
--~ local function xbibtexconcat(t,sep,finalsep,lastsep)
--~ local n = #t
--~ if n > 0 then
--~ context(t[1])
--~ if n > 1 then
--~ if n > 2 then
--~ for i=2,n-1 do
--~ context.bibtexpublicationsparameter("sep")
--~ context(t[i])
--~ end
--~ context.bibtexpublicationsparameter("finalsep")
--~ else
--~ context.bibtexpublicationsparameter("lastsep")
--~ end
--~ context(t[n])
--~ end
--~ end
--~ end
-- todo : sort
-- todo: choose between bibtex or commands namespace
function bibtex.authorref(id,list)
local result = collectauthoryears(id,list,method,what)
for author, years in next, result do
context(authors.concat(author,method,what,settings))
end
end
function bibtex.authoryearref(id,list)
local result = collectauthoryears(id,list,method,what)
for author, years in next, result do
context("%s (%s)",authors.concat(author,method,what,settings),concat(years,", "))
end
end
function bibtex.authoryearsref(id,list)
local result = collectauthoryears(id,list,method,what)
for author, years in next, result do
context("(%s, %s)",authors.concat(author,method,what,settings),concat(years,", "))
end
end
function bibtex.singularorplural(singular,plural)
if lastconcatsize and lastconcatsize > 1 then
context(plural)
else
context(singular)
end
end
end
--~ local function test(sample)
--~ local authors = splitauthors(sample)
--~ print(table.serialize(authors))
--~ for i=1,#authors do
--~ local author = authors[i]
--~ print(normalauthor (author,settings))
--~ print(normalshortauthor (author,settings))
--~ print(invertedauthor (author,settings))
--~ print(invertedshortauthor(author,settings))
--~ end
--~ print(concatauthors(sample,settings,normalauthor))
--~ print(concatauthors(sample,settings,normalshortauthor))
--~ print(concatauthors(sample,settings,invertedauthor))
--~ print(concatauthors(sample,settings,invertedshortauthor))
--~ end
--~ local sample_a = "Hagen, Hans and Hoekwater, Taco Whoever T. Ex. and Henkel Hut, Hartmut Harald von der"
--~ local sample_b = "Hans Hagen and Taco Whoever T. Ex. Hoekwater and Hartmut Harald von der Henkel Hut"
--~ test(sample_a)
--~ test(sample_b)
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