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-- Copyright 2012 Patrick Gundlach, patrick@gundla.ch
-- Public repository: https://github.com/pgundlach/lua-check-hyphen (issues/pull requests,...)
-- Version: 0.1
-- for debugging purpuse:
-- function w( ... )
-- texio.write_nl(string.format(...))
-- end
local explode = function(s,p)
local t = { }
for s in unicode.utf8.gmatch(s,p) do
if s ~= "" then
t[#t+1] = s
end
end
return t
end
luachekchyphen = {}
luachekchyphen.hyphenattr = luatexbase.new_attribute("hyphenattr")
luachekchyphen.hyphenwords = {}
luachekchyphen.all_hyphenatedwords = {}
luachekchyphen.word_whitelist = {}
luachekchyphen.rectangle = node.new("whatsit","pdf_literal")
luachekchyphen.rectangle.data = string.format("q 0 0 10 10 re f S Q")
luachekchyphen.deligature = function ( glyph_node )
local sln = unicode.utf8
local head = glyph_node.components
local str = ""
while head do
if head.id == 37 then
if head.components then
str = str .. luachekchyphen.deligature(head)
else
str = str .. sln.char(head.char)
end
end
head = head.next
end
return str
end
luachekchyphen.collect_discs = function(head)
local word_start
local word
-- this is where we store all the breakpoints
local thisbreakpoint
local word_with_hyphen
local c
local hyphencounter = #luachekchyphen.hyphenwords + 1
local sln = unicode.utf8
while head do
if head.id == 0 then
elseif head.id == 7 then --disc
word_start = head
word_end = head
while word_start.prev and word_start.prev.id ~= 10 do
word_start = word_start.prev
end
word = ""
c = 0
while word_start and word_start.id ~= 10 do
if word_start == head then -- disc
-- there is a breakpoint after letter c
node.set_attribute(head,luachekchyphen.hyphenattr,hyphencounter)
thisbreakpoint = c
elseif word_start.id == 37 then
c = c + 1
if word_start.components then
word = word .. luachekchyphen.deligature(word_start)
elseif sln.match(sln.char(word_start.char),"%a") then
word = word .. sln.char(word_start.char)
end
end
word_start = word_start.next
end
if thisbreakpoint then
word_with_hyphen = sln.sub(word,1,thisbreakpoint) .. "-" .. sln.sub(word,thisbreakpoint+1,-1)
luachekchyphen.hyphenwords[hyphencounter] = word_with_hyphen
hyphencounter = #luachekchyphen.hyphenwords + 1
end
end
head = head.next
end
return true
end
luachekchyphen.check_discs = function (head,parent)
local c
local word
local tmp
while head do
if head.id < 2 then
luachekchyphen.check_discs(head.list,head)
elseif head.id == 7 and head.next and head.next.id == 10 then -- disc
c = node.has_attribute(head,luachekchyphen.hyphenattr)
word = luachekchyphen.hyphenwords[c]
if luachekchyphen.word_whitelist[word] then
-- word found, but OK (whitelisted)
else
luachekchyphen.all_hyphenatedwords[word] = true
if luachekchyphen.drawmarks then
tmp = node.copy(luachekchyphen.rectangle)
node.insert_after(parent,head,tmp)
end
end
end
head = head.next
end
return true
end
luachekchyphen.listhyphenatedwords = function()
if luachekchyphen.final == "true" then
return
end
local unknown_hyphenation_filename = tex.jobname .. ".uhy"
local unknown_hyphenation_file = io.open(unknown_hyphenation_filename,"w")
texio.write_nl("All words with unknown hyphenation below")
for k,v in pairs(luachekchyphen.all_hyphenatedwords) do
texio.write_nl(k)
unknown_hyphenation_file:write(k .. "\n")
end
unknown_hyphenation_file:close()
texio.write_nl("All words with unknown hyphenation above\n")
end
luachekchyphen.enable = function()
if luachekchyphen.final == "true" then
return
end
local whitelistfile,err
local filecontents
if luachekchyphen.whitelist then
for i,v in ipairs(string.explode(luachekchyphen.whitelist,",")) do
whitelistfile,err = io.open(v)
if not whitelistfile then
texio.write_nl(err)
else
filecontents = whitelistfile:read("*a")
for _,entry in ipairs(explode(filecontents,"[^%s]+")) do
luachekchyphen.word_whitelist[entry] = true
end
end
end
end
if luachekchyphen.mark == "true" then
luachekchyphen.drawmarks = true
end
luatexbase.add_to_callback("pre_linebreak_filter", luachekchyphen.collect_discs,"collect_discs")
luatexbase.add_to_callback("post_linebreak_filter",luachekchyphen.check_discs,"check_discs")
end
return luachekchyphen
-- end of file
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