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|
-- luatexko.lua
--
-- Copyright (c) 2013-2015 Dohyun Kim <nomos at ktug org>
-- Soojin Nam <jsunam at gmail com>
--
-- This work may be distributed and/or modified under the
-- conditions of the LaTeX Project Public License, either version 1.3c
-- of this license or (at your option) any later version.
-- The latest version of this license is in
-- http://www.latex-project.org/lppl.txt
-- and version 1.3c or later is part of all distributions of LaTeX
-- version 2006/05/20 or later.
luatexbase.provides_module {
name = 'luatexko',
date = '2015/12/10',
version = '1.11',
description = 'Korean linebreaking and font-switching',
author = 'Dohyun Kim, Soojin Nam',
license = 'LPPL v1.3+',
}
luatexko = luatexko or {}
local luatexko = luatexko
local warn = function(...) return luatexbase.module_warning("luatexko", format(...)) end
local dotemphnode,rubynode,ulinebox = {},{},{}
luatexko.dotemphnode = dotemphnode
luatexko.rubynode = rubynode
luatexko.ulinebox = ulinebox
local stringbyte = string.byte
local stringchar = string.char
local stringformat = string.format
local mathfloor = math.floor
local tex_round = tex.round
local tex_sp = tex.sp
local texcount = tex.count
local fontdefine = font.define
local kpse_find_file = kpse.find_file
local fontdata = fonts.hashes.identifiers
local finemathattr = luatexbase.attributes.finemathattr
local cjtypesetattr = luatexbase.attributes.cjtypesetattr
local dotemphattr = luatexbase.attributes.dotemphattr
local autojosaattr = luatexbase.attributes.autojosaattr
local luakorubyattr = luatexbase.attributes.luakorubyattr
local hangulfntattr = luatexbase.attributes.hangulfntattr
local hanjafntattr = luatexbase.attributes.hanjafntattr
local fallbackfntattr = luatexbase.attributes.fallbackfntattr
local hangulpunctsattr = luatexbase.attributes.hangulpunctsattr
local luakoglueattr = luatexbase.new_attribute("luakoglueattr")
local luakounicodeattr = luatexbase.new_attribute("luakounicodeattr")
local add_to_callback = luatexbase.add_to_callback
local gluenode = node.id("glue")
local gluespecnode = node.id("glue_spec")
local glyphnode = node.id("glyph")
local mathnode = node.id("math")
local hlistnode = node.id("hlist")
local vlistnode = node.id("vlist")
local kernnode = node.id("kern")
local penaltynode = node.id("penalty")
local rulenode = node.id("rule")
local whatsitnode = node.id("whatsit")
local whatsitspecial = node.subtype("special")
local nodedirect = node.direct
local d_todirect = nodedirect.todirect
local d_tonode = nodedirect.tonode
local d_getid = nodedirect.getid
local d_getsubtype = nodedirect.getsubtype
local d_getchar = nodedirect.getchar
local d_getfont = nodedirect.getfont
local d_getlist = nodedirect.getlist
local d_getfield = nodedirect.getfield
local d_setfield = nodedirect.setfield
local d_nodeprev = nodedirect.getprev
local d_nodenext = nodedirect.getnext
local d_has_attribute = nodedirect.has_attribute
local d_set_attribute = nodedirect.set_attribute
local d_unset_attribute = nodedirect.unset_attribute
local d_traverse = nodedirect.traverse
local d_traverse_id = nodedirect.traverse_id
local d_insert_before = nodedirect.insert_before
local d_insert_after = nodedirect.insert_after
local d_copy_node = nodedirect.copy
local d_remove_node = nodedirect.remove
local d_nodenew = nodedirect.new
local d_nodecount = nodedirect.count
local d_end_of_math = nodedirect.end_of_math
local d_nodetail = nodedirect.tail
local d_nodedimensions = nodedirect.dimensions
local d_nodefree = nodedirect.free
local emsize = 655360
local cjkclass = {
[0x2018] = 1, -- ‘
[0x201C] = 1, -- “
[0xFF08] = 1, -- (
[0xFE35] = 1, -- ( vert
[0x3014] = 1, -- 〔
[0xFE39] = 1, -- 〔 vert
[0xFF3B] = 1, -- [
[0xFE47] = 1, -- [ vert
[0xFF5B] = 1, -- {
[0xFE37] = 1, -- { vert
[0x3008] = 1, -- 〈
[0xFE3F] = 1, -- 〈 vert
[0x300A] = 1, -- 《
[0xFE3D] = 1, -- 《 vert
[0x300C] = 1, -- 「
[0xFE41] = 1, -- 「 vert
[0x300E] = 1, -- 『
[0xFE43] = 1, -- 『 vert
[0x3010] = 1, -- 【
[0xFE3B] = 1, -- 【 vert
[0x3001] = 2, -- 、
[0xFE11] = 2, -- 、 vert
[0xFF0C] = 2, -- ,
[0xFE10] = 2, -- , vert
[0x2019] = 2, -- ’
[0x201D] = 2, -- ”
[0xFF09] = 2, -- )
[0xFE36] = 2, -- ) vert
[0x3015] = 2, -- 〕
[0xFE3A] = 2, -- 〕 vert
[0xFF3D] = 2, -- ]
[0xFE48] = 2, -- ] vert
[0xFF5D] = 2, -- }
[0xFE38] = 2, -- } vert
[0x3009] = 2, -- 〉
[0xFE40] = 2, -- 〉 vert
[0x300B] = 2, -- 》
[0xFE3E] = 2, -- 》 vert
[0x300D] = 2, -- 」
[0xFE42] = 2, -- 」 vert
[0x300F] = 2, -- 』
[0xFE44] = 2, -- 』 vert
[0x3011] = 2, -- 】
[0xFE3C] = 2, -- 】 vert
[0x00B7] = 3, -- ·
[0x30FB] = 3, -- ・
[0xFF1A] = 3, -- :
[0xFE13] = 3, -- : vert
[0xFF1B] = 3, -- ;
[0xFE14] = 3, -- ; vert
[0x3002] = 4, -- 。
[0xFE12] = 4, -- 。 vert
[0xFF0E] = 4, -- .
[0x2015] = 5, -- ―
[0x2026] = 5, -- …
[0xFE19] = 5, -- … vert
[0x2025] = 5, -- ‥
[0xFE30] = 5, -- ‥ vert
[0xFF1F] = 6, -- ?
[0xFF01] = 6, -- !
}
local inhibitxspcode = {
[0x002D] = 0, -- - hyphen minus
[0x003C] = 0, -- <
[0x003E] = 1, -- >
[0x00B0] = 1,
[0x2015] = 0,
[0x2018] = 2,
[0x2019] = 1,
[0x201C] = 2,
[0x201D] = 1,
[0x2026] = 0,
[0xFE19] = 0,
[0x2032] = 1,
[0x2033] = 1,
[0x3001] = 1,
[0xFE11] = 1,
[0x3002] = 1,
[0xFE12] = 1,
[0x3008] = 2,
[0xFE3F] = 2,
[0x3009] = 1,
[0xFE40] = 1,
[0x300A] = 2,
[0xFE3D] = 2,
[0x300B] = 1,
[0xFE3E] = 1,
[0x300C] = 2,
[0xFE41] = 2,
[0x300D] = 1,
[0xFE42] = 1,
[0x300E] = 2,
[0xFE43] = 2,
[0x300F] = 1,
[0xFE44] = 1,
[0x3010] = 2,
[0xFE3B] = 2,
[0x3011] = 1,
[0xFE3C] = 1,
[0x3012] = 2, -- 〒
[0x3014] = 2,
[0xFE39] = 2,
[0x3015] = 1,
[0xFE3A] = 1,
[0x301C] = 0,
[0xFF08] = 2,
[0xFE35] = 2,
[0xFF09] = 1,
[0xFE36] = 1,
[0xFF0C] = 1,
[0xFE10] = 1,
[0xFF0E] = 1,
[0xFF1B] = 1,
[0xFE14] = 1,
[0xFF1F] = 1,
[0xFF3B] = 2,
[0xFE47] = 2,
[0xFF3D] = 1,
[0xFE48] = 1,
[0xFF5B] = 2,
[0xFE37] = 2,
[0xFF5D] = 1,
[0xFE38] = 1,
[0xFFE5] = 0,
}
local postbreakpenalty = {
[0x0023] = 500,
[0x0024] = 500,
[0x0025] = 500,
[0x0026] = 500,
[0x0028] = 10000,
[0x003C] = 10000, -- <
[0x005B] = 10000,
[0x0060] = 10000,
[0x2013] = 50, -- en-dash
[0x2014] = 50, -- em-dash
[0x2018] = 10000,
[0x201C] = 10000,
[0x3008] = 10000,
[0xFE3F] = 10000,
[0x300A] = 10000,
[0xFE3D] = 10000,
[0x300C] = 10000,
[0xFE41] = 10000,
[0x300E] = 10000,
[0xFE43] = 10000,
[0x3010] = 10000,
[0xFE3B] = 10000,
[0x3014] = 10000,
[0xFE39] = 10000,
[0xFF03] = 200,
[0xFF04] = 200,
[0xFF05] = 200,
[0xFF06] = 200,
[0xFF08] = 10000,
[0xFE35] = 10000,
[0xFF3B] = 10000,
[0xFE47] = 10000,
[0xFF40] = 10000,
[0xFF5B] = 10000,
[0xFE37] = 10000,
[0xFF62] = 10000, -- 「
}
local prebreakpenalty = {
[0x0021] = 10000,
[0x0022] = 10000,
[0x0027] = 10000,
[0x0029] = 10000,
[0x002A] = 5000, -- 500, -- *
[0x002B] = 5000, -- 500, -- +
[0x002C] = 10000,
[0x002D] = 10000,
[0x002E] = 10000,
[0x002F] = 5000, -- 500, -- /
[0x003A] = 10000,
[0x003B] = 10000,
[0x003E] = 10000, -- >
[0x003F] = 10000,
[0x005D] = 10000,
[0x00B4] = 10000,
[0x00B7] = 10000, -- ·
[0x2013] = 10000, -- –
[0x2014] = 10000, -- —
[0x2015] = 10000,
[0x2019] = 10000,
[0x201D] = 10000,
[0x2025] = 5000, -- 250, -- ‥
[0xFE30] = 5000, -- 250, -- ︰
[0x2026] = 5000, -- 250, -- …
[0xFE19] = 5000, -- 250, -- ︙
[0x2212] = 5000, -- 200, -- − minus sign
[0x3001] = 10000,
[0xFE11] = 10000,
[0x3002] = 10000,
[0xFE12] = 10000,
[0x3005] = 10000,
[0x3009] = 10000,
[0xFE40] = 10000,
[0x300B] = 10000,
[0xFE3E] = 10000,
[0x300D] = 10000,
[0xFE42] = 10000,
[0x300F] = 10000,
[0xFE44] = 10000,
[0x3011] = 10000,
[0xFE3C] = 10000,
[0x3015] = 10000,
[0xFE3A] = 10000,
[0x3041] = 150,
[0x3043] = 150,
[0x3045] = 150,
[0x3047] = 150,
[0x3049] = 150,
[0x3063] = 150,
[0x3083] = 150,
[0x3085] = 150,
[0x3087] = 150,
[0x308E] = 150,
[0x309B] = 10000,
[0x309C] = 10000,
[0x30A1] = 150,
[0x30A3] = 150,
[0x30A5] = 150,
[0x30A7] = 150,
[0x30A9] = 150,
[0x30C3] = 150,
[0x30E3] = 150,
[0x30E5] = 150,
[0x30E7] = 150,
[0x30EE] = 150,
[0x30F5] = 150,
[0x30F6] = 150,
[0x30FB] = 10000,
[0x30FC] = 10000,
[0xFF01] = 10000,
[0xFF09] = 10000,
[0xFE36] = 10000,
[0xFF0B] = 5000, -- 200, -- +
[0xFF0C] = 10000,
[0xFE10] = 10000,
[0xFF0E] = 10000,
[0xFF1A] = 10000,
[0xFE13] = 10000,
[0xFF1B] = 10000,
[0xFE14] = 10000,
[0xFF1D] = 5000, -- 200, -- =
[0xFF1F] = 10000,
[0xFF3D] = 10000,
[0xFE48] = 10000,
[0xFF5D] = 10000,
[0xFE38] = 10000,
[0xFF63] = 10000, -- 」
}
local xspcode = {
[0x0027] = 2,
[0x0028] = 1,
[0x0029] = 2,
[0x002C] = 2,
[0x002E] = 2,
[0x003B] = 2,
[0x005B] = 1,
[0x005D] = 2,
[0x0060] = 1,
}
local cjk_glue_spec = { [0] =
-- 한자 ( ) · . — ? 한글 초성 중종성 latin
{[0] = nil, {.5,.5}, nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, --한자
{[0] = nil, nil, nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, -- (
{[0] = {.5,.5}, {.5,.5}, nil, {.25,.25},nil, {.5,.5}, {.5,.5}, {.25,.25},{.25,.25},{.25,.25},{.5,.5}, }, -- )
{[0] = {.25,.25},{.25,.25},{.25,.25},{.5,.25}, {.25,.25},{.25,.25},{.25,.25},{.25,.25},{.25,.25},{.25,.25},{.25,.25},}, -- ·
{[0] = {.5,0}, {.5,0}, nil, {.75,.25},nil, {.5,0}, {.5,0}, {.5,0}, {.5,0}, {.5,0}, {.5,0}, }, -- .
{[0] = nil, {.5,.5}, nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, -- —
{[0] = {.5,.5}, {.5,.5}, nil, {.25,.25},nil, nil, nil, {.5,.5}, {.5,.5}, {.5,.5}, {.5,.5}, }, -- ?
--
{[0] = nil, {.25,.25},nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, --한글
{[0] = nil, {.25,.25},nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, --초성
{[0] = nil, {.25,.25},nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, --중종성
{[0] = nil, {.5,.5}, nil, {.25,.25},nil, nil, nil, nil, nil, nil, nil, }, --latin
}
local latin_fullstop = {
[0x2e] = 1, -- .
-- [0x21] = 2, -- !
-- [0x2c] = 2, -- ,
-- [0x3f] = 2, -- ?
-- [0x2026] = 1, -- \ldots
}
local hangulpunctuations = luatexko.hangulpunctuations or {
[0x21] = true, -- !
[0x27] = true, -- '
[0x28] = true, -- (
[0x29] = true, -- )
[0x2C] = true, -- ,
-- [0x2D] = true, -- -
[0x2E] = true, -- .
[0x3A] = true, -- :
[0x3B] = true, -- ;
[0x3C] = true, -- <
[0x3E] = true, -- >
[0x3F] = true, -- ?
[0x5B] = true, -- [
[0x5D] = true, -- ]
[0x60] = true, -- `
[0x7B] = true, -- {
[0x7D] = true, -- }
[0xB7] = true, -- periodcentered
-- [0x2014] = true, -- emdash
-- [0x2015] = true, -- horizontal bar
[0x2018] = true, -- quoteleft
[0x2019] = true, -- quoteright
[0x201C] = true, -- quotedblleft
[0x201D] = true, -- quotedblright
[0x2026] = true, -- ellipsis
[0x203B] = true, -- ※
}
luatexko.hangulpunctuations = hangulpunctuations
local josa_list = {
-- 리을, 중성, 종성
[0xAC00] = {0xC774, 0xAC00, 0xC774}, -- 가 = 이, 가, 이
[0xC740] = {0xC740, 0xB294, 0xC740}, -- 은 = 은, 는, 은
[0xC744] = {0xC744, 0xB97C, 0xC744}, -- 을 = 을, 를, 을
[0xC640] = {0xACFC, 0xC640, 0xACFC}, -- 와 = 과, 와, 과
[0xC73C] = {-1, -1, 0xC73C}, -- 으(로) = , , 으
[0xC774] = {0xC774, -1, 0xC774}, -- 이(라) = 이, , 이
}
local josa_code = {
[0x30] = 3, -- 0
[0x31] = 1, -- 1
[0x33] = 3, -- 3
[0x36] = 3, -- 6
[0x37] = 1, -- 7
[0x38] = 1, -- 8
[0x4C] = 1, -- L
[0x4D] = 3, -- M
[0x4E] = 3, -- N
[0x6C] = 1, -- l
[0x6D] = 3, -- m
[0x6E] = 3, -- n
[0xFB02] = 1, -- fl
[0xFB04] = 1, -- ffl
ng = 3,
ap = 3,
up = 3,
at = 3,
et = 3,
it = 3,
ot = 3,
ut = 3,
ok = 3,
ic = 3,
le = 1,
ime = 3,
ine = 3,
ack = 3,
ick = 3,
oat = 2,
TEX = 3,
-- else 2
}
local function d_get_gluespec (w, st, sh)
local s = d_nodenew(gluespecnode)
d_setfield(s, "width", w or 0)
d_setfield(s, "stretch", st or 0)
d_setfield(s, "shrink", sh or 0)
return s
end
local function d_get_gluenode (...)
local g = d_nodenew(gluenode)
local s = d_get_gluespec(...)
d_setfield(g, "spec", s)
return g
end
local function d_get_penaltynode (n)
local p = d_nodenew(penaltynode)
d_setfield(p,"penalty", n or 0)
return p
end
local function d_get_kernnode (n)
local k = d_nodenew(kernnode,1)
d_setfield(k,"kern", n or 0)
return k
end
local function d_get_rulenode (w,h,d)
local r = d_nodenew(rulenode)
d_setfield(r,"width", w or 0)
d_setfield(r,"height", h or 0)
d_setfield(r,"depth", d or 0)
return r
end
local function d_make_luako_glue(...)
local glue = d_get_gluenode(...)
d_set_attribute(glue,luakoglueattr,1)
return glue
end
local function is_cjk_k (c)
return (c >= 0x2E80 and c <= 0x9FFF )
or (c >= 0xF900 and c <= 0xFAFF )
or (c >= 0xFE10 and c <= 0xFE1F )
or (c >= 0xFE30 and c <= 0xFE4F )
or (c >= 0xFF00 and c <= 0xFFEF )
or (c >= 0x20000 and c <= 0x2A6DF)
or (c >= 0x2F800 and c <= 0x2FA1F)
or c == 0x00B0 or c == 0x2015
-- or c == 0x2018 or c == 0x2019
-- or c == 0x201C or c == 0x201D
or c == 0x2026 or c == 0x2032
or c == 0x2033
end
local function is_hanja (c)
return (c >= 0x3400 and c <= 0x9FFF )
or (c >= 0xF900 and c <= 0xFAFF )
or (c >= 0x20000 and c <= 0x2A6DF)
or (c >= 0x2F800 and c <= 0x2FA1F)
end
local function is_hangul (c)
return (c >= 0xAC00 and c <= 0xD7A3)
end
local function is_chosong (c)
return (c >= 0x1100 and c <= 0x115F)
or (c >= 0xA960 and c <= 0xA97C)
end
local function is_jungjongsong (c)
return (c >= 0x1160 and c <= 0x11FF)
or (c >= 0xD7B0 and c <= 0xD7Fb)
or c == 0x302E or c == 0x302F -- tone marks
end
local function is_unicode_vs (c)
return (c >= 0xFE00 and c <= 0xFE0F )
or (c >= 0xE0100 and c <= 0xE01EF)
end
local function get_cjk_class (ch, cjtype)
if ch then
if is_hangul(ch) then return 7 end -- hangul = 7
if is_chosong(ch) then return 8 end -- jamo LC = 8
if is_jungjongsong(ch) then return 9 end -- jamo VL, TC, TM = 9
local c = is_cjk_k(ch) and 0 or 10 -- hanja = 0; latin = 10
if cjkclass[ch] then c = cjkclass[ch] end -- cjkclass 1 .. 6
if cjtype then
if cjtype == 2 and
(ch == 0xFF1F or ch == 0xFF01 or ch == 0xFF1A or ch == 0xFF1B) then
c = 4 -- simplified chinese ? !
end
else
if ch == 0x2018 or ch == 0x2019 or ch == 0x201C or ch == 0x201D then
c = 10 -- korean “ ” ‘ ’
end
end
return c
end
end
local function get_font_table (fid)
if fid then
if fontdata[fid] then
return fontdata[fid]
else
return font.fonts[fid]
end
end
end
local function get_font_char (fid, chr)
local f = get_font_table(fid)
return chr and f and f.characters and f.characters[chr]
end
local function get_font_emsize(fid)
local f = get_font_table(fid)
return (f and f.parameters and f.parameters.quad) or emsize
end
local function get_font_feature (fid, name)
local f = get_font_table(fid)
return f and f.shared and f.shared.features and f.shared.features[name]
end
local function get_char_boundingbox(fid, chr)
local f = get_font_table(fid)
local glbox = f and f.shared
glbox = glbox and glbox.rawdata
glbox = glbox and glbox.descriptions
glbox = glbox and glbox[chr] and glbox[chr].boundingbox
if glbox then
local factor, bbox = f.parameters and f.parameters.factor or 655.36, {}
for i,v in ipairs(glbox) do
bbox[i] = v * factor
end
return bbox
end
end
local function d_get_unicode_char(curr)
local uni = d_getchar(curr)
if (uni > 0xFF and uni < 0xE000) or (uni > 0xF8FF and uni < 0xF0000) then
return uni -- no pua. no nanumgtm
end
if uni < 0xE000 or (uni > 0xF8FF and uni < 0xF0000) then -- no pua
local uchr = get_font_char(d_getfont(curr), uni)
uchr = uchr and uchr.tounicode
uchr = uchr and uchr:sub(1,4) -- seems ok for old hangul
if uchr then return tonumber(uchr,16) end
end
local uatt = d_has_attribute(curr, luakounicodeattr)
if uatt then return uatt end
return uni
end
local function d_get_hlist_char_first (hlist)
local curr = d_getlist(hlist)
while curr do
local currid = d_getid(curr)
if currid == glyphnode then
local c,f = d_get_unicode_char(curr), d_getfont(curr)
if c then return c,f end
elseif currid == hlistnode or currid == vlistnode then
local c,f = d_get_hlist_char_first(curr)
if c then return c,f end
elseif currid == gluenode then
local currspec = d_getfield(curr,"spec")
if currspec and d_getfield(currspec,"width") ~= 0 then return end
end
curr = d_nodenext(curr)
end
end
local function d_get_hlist_char_last (hlist,prevchar,prevfont)
local curr = d_nodetail(d_getlist(hlist))
while curr do
local currid = d_getid(curr)
if currid == glyphnode then
local c,f = d_get_unicode_char(curr), d_getfont(curr)
if c and not is_unicode_vs(c) then return c,f end -- bypass VS
elseif currid == hlistnode or currid == vlistnode then
local c,f = d_get_hlist_char_last(curr)
if c then return c,f end
elseif currid == gluenode then
local currspec = d_getfield(curr,"spec")
if currspec and d_getfield(currspec,"width") ~= 0 then return end
end
curr = d_nodeprev(curr)
end
return prevchar, prevfont
end
----------------------------
-- cjk linebreak and spacing
----------------------------
local function kanjiskip (head,curr)
d_insert_before(head,curr,d_make_luako_glue(0, emsize*0.1, emsize*0.02))
end
local function xkanjiskip (head,curr)
if d_has_attribute(curr,finemathattr) == 0 then -- ttfamily
kanjiskip(head,curr)
else
d_insert_before(head,curr,d_make_luako_glue(0.25*emsize, emsize*0.15, emsize*0.06))
end
end
local function interhangulskip (head,curr,currfont,prevfont,was_penalty)
local width = 0
local interhangul = get_font_feature(currfont, "interhangul")
if interhangul and currfont == prevfont then
width = tex_sp(interhangul)
end
if not was_penalty then
d_insert_before(head,curr,d_get_penaltynode(50))
end
d_insert_before(head,curr,d_make_luako_glue(width, emsize*0.04, emsize*0.02))
end
local function interhanjaskip (head,curr,was_penalty)
if not was_penalty then
d_insert_before(head,curr,d_get_penaltynode(50))
end
d_insert_before(head,curr,d_make_luako_glue(0, emsize*0.04, emsize*0.02))
end
local function koreanlatinskip (head,curr,currfont,prevfont,was_penalty)
local width = 0 -- default: 0em
if (d_has_attribute(curr,finemathattr) or 0) > 0 then -- not ttfamily
local latincjk = get_font_feature(currfont, "interlatincjk")
if not latincjk then
latincjk = get_font_feature(prevfont, "interlatincjk")
end
if latincjk then
width = tex_sp(latincjk)
end
end
if not was_penalty then
d_insert_before(head,curr,d_get_penaltynode(50))
end
d_insert_before(head,curr,d_make_luako_glue(width, emsize*0.04, emsize*0.02))
end
local function cjk_insert_nodes(head,curr,currchar,currfont,prevchar,prevfont,was_penalty)
local currentcjtype = d_has_attribute(curr,cjtypesetattr)
local p = get_cjk_class(prevchar, currentcjtype)
local c = get_cjk_class(currchar, currentcjtype)
---[[raise latin puncts
if d_getid(curr) == glyphnode and (d_has_attribute(curr,finemathattr) or 0) > 0 and c < 10 then -- not ttfamily
local nn, raise = d_nodenext(curr), nil
while nn do
local nnid = d_getid(nn)
if nnid == glyphnode and latin_fullstop[d_getchar(nn)] then
if not raise then
raise = get_font_feature(currfont, "punctraise")
raise = raise and tex_sp(raise)
end
if raise then
local yoff = d_getfield(nn,"yoffset") or 0
d_setfield(nn,"yoffset", yoff + raise)
end
nn = d_nodenext(nn)
elseif nnid == kernnode then
nn = d_nodenext(nn)
else
break
end
end
end
--raise latin puncts]]
if c == 5 and p == 5 then -- skip ------ ......
return currchar,currfont
end
if p and p < 10 and prebreakpenalty[currchar] then
was_penalty = true
d_insert_before(head,curr,d_get_penaltynode(prebreakpenalty[currchar]))
elseif c and c < 10 and postbreakpenalty[prevchar] then
was_penalty = true
d_insert_before(head,curr,d_get_penaltynode(postbreakpenalty[prevchar]))
end
---[[ kern is a breakpoint if followed by a glue: protrusion and compress_fullwidth_punctuations
if (c and c == 1) or (p and p >= 2 and p <= 6) then was_penalty = true end
--]]
if p and c then
if currentcjtype then
if cjk_glue_spec[p] and cjk_glue_spec[p][c] then
local width = emsize * cjk_glue_spec[p][c][1]
local stretch = 0
local shrink = emsize * cjk_glue_spec[p][c][2]
d_insert_before(head,curr,d_make_luako_glue(width, stretch, shrink))
elseif p < 10 and c < 9 then -- break between chosong and chosong
kanjiskip(head,curr)
elseif (p < 10 and c == 10) or (p == 10 and c < 10) then
if xspcode[currchar] then
if xspcode[currchar] % 2 == 1 then
xkanjiskip(head,curr)
end
elseif xspcode[prevchar] then
if xspcode[prevchar] > 1 then
xkanjiskip(head,curr)
end
elseif inhibitxspcode[currchar] then -- 3, 2
if inhibitxspcode[currchar] > 1 then
xkanjiskip(head,curr)
end
elseif inhibitxspcode[prevchar] then -- 3, 1
if inhibitxspcode[prevchar] % 2 == 1 then
xkanjiskip(head,curr)
end
else
xkanjiskip(head,curr)
end
end
else
if (p < 10 and c == 10) or (p == 10 and c < 10) then
if xspcode[currchar] then
if xspcode[currchar] % 2 == 1 then
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
end
elseif xspcode[prevchar] then
if xspcode[prevchar] > 1 then
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
end
elseif inhibitxspcode[currchar] then -- 3, 2
if inhibitxspcode[currchar] > 1 then
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
end
elseif inhibitxspcode[prevchar] then -- 3, 1
if inhibitxspcode[prevchar] % 2 == 1 then
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
end
else
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
end
elseif cjk_glue_spec[p] and cjk_glue_spec[p][c] then
koreanlatinskip(head,curr,currfont,prevfont,was_penalty)
elseif p == 7 and c == 7 then
interhangulskip(head,curr,currfont,prevfont,was_penalty)
elseif p < 10 and c < 9 then -- break between chosong and chosong
interhanjaskip(head,curr,was_penalty)
end
end
end
return currchar,currfont
end
local function cjk_spacing_linebreak (head)
local prevchar,prevfont,was_penalty,prevfine = nil,nil,nil,nil
local curr = head
while curr do
local currfine = d_has_attribute(curr,finemathattr)
if currfine then
local currid = d_getid(curr)
if currid == gluenode then
prevchar,prevfont,prevfine = nil,nil,nil
d_unset_attribute(curr,finemathattr)
elseif currid == glyphnode then
local currfont = d_getfont(curr)
emsize = get_font_emsize(currfont)
local uni = d_get_unicode_char(curr)
if uni and not is_unicode_vs(uni) then -- bypass VS
if prevfine and prevfine > 0 and currfine == 0 then
d_set_attribute(curr, finemathattr, 1)
end
prevchar,prevfont = cjk_insert_nodes(head,curr,uni,currfont,prevchar,prevfont,was_penalty)
prevfine = currfine
end
d_unset_attribute(curr,finemathattr)
elseif currid == mathnode then
local currchar = 0
local currsurround, currsubtype = d_getfield(curr,"surround"), d_getsubtype(curr)
if currsurround and currsurround > 0 then
currchar = 0x4E00
end
if currsubtype == 0 then
cjk_insert_nodes(head,curr,currchar,nil,prevchar,prevfont,was_penalty)
curr = d_end_of_math(curr)
if not curr then break end
prevchar,prevfont,prevfine = currchar,nil,nil
end
d_unset_attribute(curr,finemathattr)
elseif currid == hlistnode or currid == vlistnode then
local firstchr, firstfid = d_get_hlist_char_first(curr)
if firstchr then
cjk_insert_nodes(head,curr,firstchr,firstfid,prevchar,prevfont,was_penalty)
end
prevchar,prevfont = d_get_hlist_char_last(curr,prevchar,prevfont)
if d_getlist(curr) then prevfine = nil end -- empty box preserves prevfine.
d_unset_attribute(curr,finemathattr)
end
was_penalty = currid == penaltynode
else
if d_getid(curr) == glyphnode and prevfine and prevfine > 0 then -- fitst glyph in verb
d_set_attribute(curr, finemathattr, 1)
cjk_insert_nodes(head,curr,0,nil,prevchar,prevfont,was_penalty)
d_unset_attribute(curr,finemathattr)
end
prevchar,prevfont,prevfine = 0,nil,nil -- treat \verb as latin character.
end
curr = d_nodenext(curr)
end
end
------------------------------------
-- remove japanese/chinese spaceskip
------------------------------------
local function remove_cj_spaceskip (head)
local curr, prevfont = head, nil
while curr do
local currid,currsubtype = d_getid(curr), d_getsubtype(curr)
if currid == mathnode and currsubtype == 0 then
curr = d_end_of_math(curr)
elseif currid == gluenode then
local cjattr = d_has_attribute(curr,cjtypesetattr)
local prv, nxt = d_nodeprev(curr), d_nodenext(curr)
if cjattr and cjattr > 0 and prv and nxt then
local prevclass, prevchar, nextclass
local prvid, nxtid = d_getid(prv), d_getid(nxt)
if prvid == hlistnode or prvid == vlistnode then
prevclass = get_cjk_class(d_get_hlist_char_last(prv), cjattr)
else
-- what is this strange kern before \text??
if prvid == kernnode and d_getfield(prv,"kern") == 0 then
prv = d_nodeprev(prv)
end
if prvid == glyphnode then
prevchar, prevfont = d_getchar(prv), d_getfont(prv)
if is_unicode_vs(prevchar) then prv = d_nodeprev(prv) end -- bypass VS
prevclass = get_cjk_class(d_get_unicode_char(prv), cjattr)
end
end
if nxtid == glyphnode then
nextclass = get_cjk_class(d_get_unicode_char(nxt), cjattr)
elseif nxtid == hlistnode or nxtid == vlistnode then
nextclass = get_cjk_class(d_get_hlist_char_first(nxt), cjattr)
end
if (prevclass and prevclass < 10) or (nextclass and nextclass < 10) then
local subtype = currsubtype
if subtype == 13 then -- do not touch on xspaceskip for now
d_remove_node(head,curr)
d_nodefree(curr)
curr = nxt
elseif subtype == 0 then -- before \text?? spaceskip is replaced by glue type 0
local spec = d_getfield(curr,"spec")
local csp = spec and d_getfield(spec,"width")
local cst = spec and d_getfield(spec,"stretch")
local csh = spec and d_getfield(spec,"shrink")
local fp = get_font_table(prevfont)
fp = fp and fp.parameters
local sp = fp and fp.space
local st = fp and fp.space_stretch
local sh = fp and fp.space_shrink
sp = sp and tex_round(sp)
st = st and tex_round(st)
sh = sh and tex_round(sh)
if prevchar and prevchar >= 65 and prevchar <= 90 then
st = st and mathfloor(st*(999/1000))
sh = sh and mathfloor(sh*(1001/1000))
end
if sp == csp and st == cst and sh == csh then
d_remove_node(head,curr)
d_nodefree(curr)
curr = nxt
end
end
end
end
end
curr = d_nodenext(curr)
end
end
----------------------------------
-- compress fullwidth punctuations
----------------------------------
local function check_next_halt_kern (head, curr)
-- glyph halt_kern glue -> glyph halt_kern rule glue
local nn = d_nodenext(curr)
if nn and d_getid(nn) == kernnode and d_nodenext(nn) then
d_insert_after(head, nn, d_get_rulenode(0))
end
end
local function check_prev_halt_kern (head, curr)
local pn = d_nodeprev(curr)
if pn and d_getid(pn) == kernnode and d_nodeprev(pn) then
-- glue halt_kern glyph -> glue rule halt_kern glyph
head = d_insert_before(head, pn, d_get_rulenode(0))
elseif pn and d_getid(pn) == gluenode and d_has_attribute(pn, luakoglueattr) then
-- halt_kern ko_glue glyph -> ko_glue rule halt_kern glyph
local ppn = d_nodeprev(pn)
if d_getid(ppn) == kernnode then
head = d_remove_node(head, ppn)
head = d_insert_before(head, curr, ppn)
head = d_insert_before(head, ppn, d_get_rulenode(0))
end
end
return head
end
local function compress_fullwidth_punctuations (head)
for curr in d_traverse_id(glyphnode,head) do
local currfont, currchar = d_getfont(curr), d_getchar(curr)
local cjtype = d_has_attribute(curr, cjtypesetattr)
local uni = d_get_unicode_char(curr)
local class = uni and get_cjk_class(uni, cjtype or 0) -- include U+201C ...
local chr = get_font_char(currfont, currchar)
if chr and class and class >= 1 and class <= 4 then
local halt_on = get_font_feature(currfont,'halt') or get_font_feature(currfont,'vhal')
local width = d_getfield(curr,"width") or 655360
emsize = get_font_emsize(currfont)
local ensize = emsize/2
local oneoften = emsize/10
local bbox = get_char_boundingbox(currfont, currchar)
bbox = bbox or {ensize-oneoften, ensize-oneoften, ensize+oneoften, ensize+oneoften}
if class == 2 or class == 4 then
local wd
if get_font_feature(currfont,'vertical') then
wd = ensize<width and ensize-width or 0
else
wd = (bbox[3] < ensize) and ensize-width or bbox[3]-width+oneoften
if not cjtype and wd > 0 then wd = 0 end
end
if chr.right_protruding then
-- kern is a breakpoint if followed by a glue
if not halt_on then
d_insert_after(head, curr, d_get_kernnode(wd))
end
else
if halt_on then
check_next_halt_kern(head, curr)
else
d_insert_after(head, curr, d_get_rulenode(wd))
end
end
elseif class == 1 then
local wd
if get_font_feature(currfont,'vertical') then
wd = ensize<width and ensize-width or 0
else
wd = (width-bbox[1] < ensize) and ensize-width or -bbox[1]+oneoften
if not cjtype and wd > 0 then wd = 0 end
end
if chr.left_protruding then
if not halt_on then
head = d_insert_before(head, curr, d_get_kernnode(wd))
end
else
if halt_on then
head = check_prev_halt_kern(head, curr)
else
head = d_insert_before(head, curr, d_get_rulenode(wd))
end
end
elseif class == 3 then
local lwd, rwd
local quarter, thirdquarter, halfwd = ensize/2, ensize*1.5, width/2
if get_font_feature(currfont,'vertical') then
rwd = quarter<halfwd and quarter-halfwd or 0
lwd = rwd
else
rwd = (bbox[3] < thirdquarter) and quarter-halfwd or bbox[3]-width
lwd = (width-bbox[1] < thirdquarter) and quarter-halfwd or -bbox[1]
end
if chr.left_protruding then
if not halt_on then
head = d_insert_before(head, curr, d_get_kernnode(lwd))
end
else
if halt_on then -- there's already penalty 10000
head = check_prev_halt_kern(head, curr)
else
head = d_insert_before(head, curr, d_get_rulenode(lwd))
end
end
if chr.right_protruding then
if not halt_on then
d_insert_after (head, curr, d_get_kernnode(rwd))
end
else
if halt_on then
check_next_halt_kern(head, curr)
else
d_insert_after (head, curr, d_get_rulenode(rwd))
end
end
end
end
end
return head -- should be returned!
end
------------------------------
-- ruby: pre-linebreak routine
------------------------------
local function spread_ruby_box(head,extrawidth)
local to_free = {}
for curr in d_traverse_id(gluenode,head) do
local currspec = d_getfield(curr,"spec")
if currspec then
local wd = d_getfield(currspec,"width") or 0
if d_has_attribute(curr,luakoglueattr) then
d_setfield(currspec,"width", wd + extrawidth)
else
head = d_insert_before(head,curr,d_get_kernnode(wd+extrawidth))
head = d_remove_node(head,curr)
to_free[#to_free + 1] = curr
end
end
end
if #to_free > 0 then
for _,v in ipairs(to_free) do d_nodefree(v) end
end
return head
end
local function spread_ruby_base_box (head)
for curr in d_traverse_id(hlistnode,head) do
local attr = d_has_attribute(curr,luakorubyattr)
local rubyoverlap = attr and rubynode[attr][3]
if attr and not rubyoverlap then
local ruby = d_todirect(rubynode[attr][1])
local currwidth, rubywidth = d_getfield(curr,"width"), d_getfield(ruby,"width")
if ruby and rubywidth > currwidth then
local basehead = d_getlist(curr)
local numofglues = d_nodecount(gluenode,basehead)
local extrawidth = (rubywidth - currwidth)/(numofglues + 1)
if numofglues > 0 then
basehead = spread_ruby_box(basehead,extrawidth)
end
local leading = d_get_kernnode(extrawidth/2)
d_setfield(curr,"width", rubywidth)
d_setfield(leading,"next", basehead)
d_setfield(curr,"head", leading)
end
end
end
end
local function get_ruby_side_width (basewidth,rubywidth,adjacent)
local width,margin = (rubywidth-basewidth)/2, 0
if adjacent then
if d_getid(adjacent) == glyphnode then
local uni = d_get_unicode_char(adjacent)
if is_unicode_vs(uni) then -- bypass VS
uni = d_get_unicode_char(d_nodeprev(adjacent))
end
if not is_hanja(uni) then
width = (rubywidth-basewidth-emsize)/2
if width > 0 then
margin = emsize/2
else
width,margin = 0,(rubywidth-basewidth)/2
end
end
end
end
return width,margin
end
local function get_ruby_side_kern (head)
for curr in d_traverse_id(hlistnode,head) do
local attr = d_has_attribute(curr,luakorubyattr)
local rubyoverlap = attr and rubynode[attr][3]
if rubyoverlap then
local currwidth = d_getfield(curr,"width")
local basewidth = currwidth
local ruby = d_todirect(rubynode[attr][1])
local rubywidth = d_getfield(ruby,"width")
if currwidth < rubywidth then
local _,fid = d_get_hlist_char_first(curr)
emsize = get_font_emsize(fid)
local leftwidth,leftmargin = get_ruby_side_width(basewidth,rubywidth,d_nodeprev(curr))
if leftwidth > 0 then
currwidth = currwidth + leftwidth
d_setfield(curr,"width", currwidth)
end
if leftmargin > 0 then
rubynode[attr].leftmargin = leftmargin
end
local rightwidth,rightmargin = get_ruby_side_width(basewidth,rubywidth,d_nodenext(curr))
if rightwidth > 0 then
currwidth = currwidth + rightwidth
d_setfield(curr,"width", currwidth)
end
if rightmargin > 0 then
rubynode[attr].rightmargin = rightmargin
end
rubynode[attr].rightshift = rightwidth - leftwidth
local totalspace = leftwidth+rightwidth
if totalspace > 0 then
local currhead = d_getlist(curr)
local numofglues = d_nodecount(gluenode,currhead)
local extrawidth = totalspace/(numofglues + 1)
if numofglues > 0 then
currhead = spread_ruby_box(currhead,extrawidth)
end
local leading = d_get_kernnode(extrawidth*(leftwidth/totalspace))
d_setfield(leading,"next", currhead)
d_setfield(curr,"head", leading)
end
end
end
end
end
local function zero_width_rule_with_dir (head,curr,before)
local rule = d_get_rulenode(0)
d_setfield(rule,"dir", d_getfield(curr,"dir"))
if before then
head = d_insert_before(head,curr,rule)
else
d_insert_after(head,curr,rule)
end
return head
end
local function no_ruby_at_margin(head)
for curr in d_traverse_id(hlistnode,head) do
local attr = d_has_attribute(curr,luakorubyattr)
if attr then
local margin = rubynode[attr].leftmargin
if margin then
head = d_insert_before(head,curr,d_get_kernnode(-margin))
head = zero_width_rule_with_dir(head,curr,true) -- before
head = d_insert_before(head,curr,d_get_kernnode(margin))
end
margin = rubynode[attr].rightmargin
if margin then
local nn = d_nodenext(curr)
if nn then
local nnid = d_getid(nn)
if nnid == gluenode then
d_insert_after(head,curr,d_get_kernnode(-margin))
head = zero_width_rule_with_dir(head,curr)
d_insert_after(head,curr,d_get_kernnode(margin))
elseif nnid == penaltynode and d_getfield(nn,"penalty") < 10000 then
d_insert_after(head,nn,d_get_kernnode(-margin))
head = zero_width_rule_with_dir(head,curr)
d_insert_after(head,curr,d_get_kernnode(margin))
end
end
end
end
end
return head
end
------------------------------
-- discourage character orphan
------------------------------
local function inject_char_widow_penalty (head,curr,uni,cjattr)
if uni and prebreakpenalty[uni] ~= 10000 then
local class = get_cjk_class(uni, cjattr)
if class and class < 9 then
local pv = cjattr and 500 or 5000
local np = d_nodeprev(curr)
if np and d_getid(np) == rulenode then
curr = np; np = d_nodeprev(curr)
end
if np and d_getid(np) == gluenode then
curr = np; np = d_nodeprev(curr)
end
if np and d_getid(np) == penaltynode then
curr = np
local currpenalty = d_getfield(curr,"penalty")
if currpenalty < pv and currpenalty > 0 then -- bypass \\ case
d_setfield(curr,"penalty", pv)
end
elseif curr and d_getid(curr) == gluenode then
head, curr = d_insert_before(head,curr,d_get_penaltynode(pv))
end
end
end
return curr
end
local function discourage_char_widow (head,curr)
while curr do
if curr == head then return end
local currid = d_getid(curr)
if currid == glyphnode then
emsize = get_font_emsize(d_getfont(curr))
local remwd = d_nodedimensions(curr)
if remwd > 2*emsize then return end
local cjattr = d_has_attribute(curr,cjtypesetattr)
local uni = d_get_unicode_char(curr)
curr = inject_char_widow_penalty(head,curr,uni,cjattr)
elseif currid == hlistnode and currid == vlistnode then
local remwd = d_nodedimensions(curr)
local uni,fid = d_get_hlist_char_first(curr)
emsize = get_font_emsize(fid)
if remwd > 2*emsize then return end
local cjattr = d_has_attribute(curr,cjtypesetattr)
curr = inject_char_widow_penalty(head,curr,uni,cjattr)
end
curr = d_nodeprev(curr)
end
end
---------------------------
-- automatic josa selection
---------------------------
local function syllable2jamo (code)
local code = code - 0xAC00
local L = 0x1100 + mathfloor(code / 588)
local V = 0x1161 + mathfloor((code % 588) / 28)
local T = 0x11A7 + code % 28
if T == 0x11A7 then T = nil end
return L, V, T
end
local function number2josacode (n)
n = n % 10 + stringbyte("0")
if josa_code[n] then return josa_code[n] end
return nil -- 2
end
local function latin2josacode (n)
n = n + stringbyte("a")
if josa_code[n] then return josa_code[n] end
return nil -- 2
end
for c = 0x2160, 0x216B do -- Ⅰ
josa_code[c] = number2josacode(c - 0x215F)
end
for c = 0x2170, 0x217B do -- ⅰ
josa_code[c] = number2josacode(c - 0x216F)
end
for c = 0x2460, 0x2473 do -- ①
josa_code[c] = number2josacode(c - 0x245F)
end
for c = 0x2474, 0x2487 do -- ⑴
josa_code[c] = number2josacode(c - 0x2473)
end
for c = 0x2488, 0x249B do -- ⒈
josa_code[c] = number2josacode(c - 0x2487)
end
for c = 0x249C, 0x24B5 do -- ⒜
josa_code[c] = latin2josacode(c - 0x249C)
end
for c = 0x24B6, 0x24CF do -- Ⓐ
josa_code[c] = latin2josacode(c - 0x24B6)
end
for c = 0x24D0, 0x24E9 do -- ⓐ
josa_code[c] = latin2josacode(c - 0x24D0)
end
for c = 0x3131, 0x314E do -- ㄱ
josa_code[c] = 3
end
josa_code[0x3139] = 1 -- ㄹ
for c = 0x3165, 0x3186 do
josa_code[c] = 3
end
for c = 0x3200, 0x320D do -- ㈀
josa_code[c] = 3
end
josa_code[0x3203] = 1 -- ㈃
for c = 0x3260, 0x327F do -- ㉠
josa_code[c] = 3
end
josa_code[0x3263] = 1 -- ㉣
for c = 0xFF10, 0xFF19 do -- 0
josa_code[c] = number2josacode(c - 0xFF10)
end
for c = 0xFF21, 0xFF3A do -- A
josa_code[c] = latin2josacode(c - 0xFF21)
end
for c = 0xFF41, 0xFF5A do -- a
josa_code[c] = latin2josacode(c - 0xFF41)
end
local function jamo2josacode(code)
if code and code > 0x11A7 then
if code == 0x11AF then return 1 end
return 3
end
return 2
end
local function get_hanja_hangul_table (table,file,init)
local i = 0
local file = kpse_find_file(file)
if not file then return table end
file = io.open(file, "r")
if not file then return table end
while true do
local d = file:read("*number")
if not d then break end
table[init + i] = d
i = i + 1
end
file:close()
return table
end
local hanja2hangul
local function initialize_hanja2hangul ()
hanja2hangul = {}
hanja2hangul = get_hanja_hangul_table(hanja2hangul,"hanja_hangul.tab",0x4E00)
hanja2hangul = get_hanja_hangul_table(hanja2hangul,"hanjaexa_hangul.tab",0x3400)
hanja2hangul = get_hanja_hangul_table(hanja2hangul,"hanjacom_hangul.tab",0xF900)
end
-- 1 : 리을, 2 : 중성, 3 : 종성
local function get_josacode (prevs)
local code = prevs[1] -- last char
if not code then return 2 end
if is_hangul(code) then -- hangul syllable
local _, _, T = syllable2jamo(code)
return jamo2josacode(T)
end
if is_jungjongsong(code) then return jamo2josacode(code) end
if (code >= 0x3400 and code <= 0x9FA5)
or (code >= 0xF900 and code <= 0xFA2D) then
if not hanja2hangul then initialize_hanja2hangul() end
local _, _, T = syllable2jamo(hanja2hangul[code])
return jamo2josacode(T)
end
-- latin
if prevs[1] < 0x80
and prevs[2] and prevs[2] < 0x80
and prevs[3] and prevs[3] < 0x80 then
local liii = stringchar(prevs[3], prevs[2], prevs[1])
if josa_code[liii] then return josa_code[liii] end
end
if prevs[1] < 0x80
and prevs[2] and prevs[2] < 0x80 then
local lii = stringchar(prevs[2], prevs[1])
if josa_code[lii] then return josa_code[lii] end
end
if josa_code[code] then return josa_code[code] end
return 2
end
local function get_josaprevs(curr,josaprev,ignoreparens,halt)
if type(halt) ~= "number" then halt = 0 end
while curr do
local currid = d_getid(curr)
if currid == glyphnode then
local chr = d_get_unicode_char(curr)
-- ignore chars inside parentheses (KTS workshop 2013.11.09)
if ignoreparens and chr == 0x29 then -- right parenthesis
halt = halt + 1
elseif ignoreparens and chr == 0x28 then -- left parenthesis
halt = halt - 1
elseif xspcode[chr]
or inhibitxspcode[chr]
or prebreakpenalty[chr]
or postbreakpenalty[chr]
or is_unicode_vs(chr) -- bypass VS
or chr == 0x302E -- tone mark
or chr == 0x302F then -- tone mark
--skip
elseif halt <= 0 then
josaprev[#josaprev + 1] = chr
end
elseif currid == hlistnode or currid == vlistnode then
josaprev = get_josaprevs(d_nodetail(d_getlist(curr)),josaprev,ignoreparens,halt)
end
if #josaprev == 3 then break end
curr = d_nodeprev(curr)
end
return josaprev
end
local function korean_autojosa (head)
local to_free = {}
for curr in d_traverse_id(glyphnode,head) do
local josaattr = d_has_attribute(curr,autojosaattr)
if josaattr and d_has_attribute(curr,finemathattr) then
local ignoreparens = josaattr > 1 and true or false
local josaprev = {}
josaprev = get_josaprevs(d_nodeprev(curr),josaprev,ignoreparens)
local josacode = get_josacode(josaprev)
local thischar = d_get_unicode_char(curr)
if thischar == 0xC774 then
local nn = d_nodenext(curr)
if nn and d_getid(nn) == glyphnode and d_get_unicode_char(nn) == 0xB77C then
d_setfield(curr,"char", josa_list[0xC774][josacode])
else
d_setfield(curr,"char", josa_list[0xAC00][josacode])
end
elseif thischar and josa_list[thischar] then
d_setfield(curr,"char", josa_list[thischar][josacode])
end
end
if d_getchar(curr) < 0 then
d_remove_node(head,curr)
to_free[#to_free + 1] = curr
end
end
if #to_free > 0 then
for _,v in ipairs(to_free) do d_nodefree(v) end
end
end
------------------------------
-- switch to hangul/hanja font
------------------------------
local function hangulspaceskip (engfont, hfontid, spec)
local eng = engfont.parameters
if not eng then return end
if not spec then return end
if d_getfield(spec,"stretch_order") ~= 0 or d_getfield(spec,"shrink_order") ~= 0 then return end
local gsp, gst, gsh = d_getfield(spec,"width"), d_getfield(spec,"stretch"), d_getfield(spec,"shrink")
local esp, est, esh = eng.space, eng.space_stretch, eng.space_shrink
esp = esp and tex_round(esp)
est = est and tex_round(est)
esh = esh and tex_round(esh)
if esp == gsp and est == gst and esh == gsh then else return end
local hf = get_font_table(hfontid)
if not hf then return end
local hp = hf.parameters
if not hp then return end
local hsp,hst,hsh = hp.space,hp.space_stretch,hp.space_shrink
if hsp and hst and hsh then else return end
return tex_round(hsp), tex_round(hst), tex_round(hsh)
end
local type1fonts = {} -- due to too verbose log
local function nanumtype1font(curr)
local currchar, currfont = d_getchar(curr), d_getfont(curr)
if currchar > 0xFFFF then return end
local fnt_t = get_font_table(currfont)
local family = (d_has_attribute(curr,finemathattr) or 0) > 1 and not is_hanja(currchar) and "nanummj" or "nanumgt"
local series = fnt_t.shared and fnt_t.shared.rawdata.metadata.pfminfo.weight
if series then
series = series > 500 and "b" or "m"
else
series = fnt_t.name:find("^cmb") and "b" or "m"
end
local shape = fnt_t.parameters.slant > 0 and "o" or ""
local subfnt = stringformat("%s%s%s%02x",family,series,shape,currchar/256)
local fsize = fnt_t.size or 655360
local fspec = stringformat("%s@%d",subfnt,fsize)
local newfnt = type1fonts[fspec]
if newfnt == false then return end
local newchr = currchar % 256
local function ital_corr (curr,chr_t)
if shape ~= "o" then return end
local nxt = d_nodenext(curr)
if nxt and d_getid(nxt) == kernnode and d_getsubtype(nxt) == 1 and d_getfield(nxt,"kern") == 0 then
d_setfield(nxt,"kern", chr_t.italic or 0)
end
end
if newfnt then
local fntchr = get_font_char(newfnt,newchr)
if fntchr then
d_setfield(curr,"font", newfnt)
d_setfield(curr,"char", newchr)
ital_corr(curr,fntchr)
end
elseif kpse_find_file(subfnt,"tfm") then
local ft, id = fonts.constructors.readanddefine(subfnt,fsize)
local fntchr = ft and ft.characters[newchr]
if id and fntchr then
type1fonts[fspec] = id
d_setfield(curr,"font", id)
d_setfield(curr,"char", newchr)
ital_corr(curr,fntchr)
end
else
type1fonts[fspec] = false
end
end
local function font_substitute(head)
local curr = head
while curr do
local currid = d_getid(curr)
if currid == mathnode and d_getsubtype(curr) == 0 then
curr = d_end_of_math(curr)
elseif currid == glyphnode then
local currchar, currfont = d_getchar(curr), d_getfont(curr)
if currchar then
if is_unicode_vs(currchar) then -- ideograph variation selectors
local prev = d_nodeprev(curr)
local prevfont = d_getid(prev) == glyphnode and d_getfont(prev)
if prevfont ~= currfont then
d_setfield(curr, "font", prevfont) -- sync font
end
else
local myfontchar
local eng = currfont and get_font_table(currfont)
if eng and eng.encodingbytes and eng.encodingbytes == 2 -- exclude type1
and hangulpunctuations[currchar] and d_has_attribute(curr, hangulpunctsattr)
and (d_has_attribute(curr, finemathattr) or 0) > 0 -- not ttfamily
and not get_font_char(currfont, 0xAC00) then -- exclude hangul font
else
myfontchar = get_font_char(currfont, currchar)
end
if not myfontchar then
local hangul = d_has_attribute(curr, hangulfntattr)
local hanja = d_has_attribute(curr, hanjafntattr)
local fallback = d_has_attribute(curr, fallbackfntattr)
local ftable = {hangul, hanja, fallback}
if luatexko.hanjafontforhanja then
local uni = d_get_unicode_char(curr)
uni = uni and get_cjk_class(uni)
if uni and uni < 7 then ftable = {hanja, hangul, fallback} end
end
for i = 1,3 do
local fid = ftable[i]
myfontchar = fid and get_font_char(fid, currchar)
if myfontchar then
d_setfield(curr,"font",fid)
--- charraise option charraise
local charraise = get_font_feature(fid, "charraise")
if charraise then
charraise = tex_sp(charraise)
local curryoffset = d_getfield(curr,"yoffset") or 0
d_setfield(curr,"yoffset", charraise + curryoffset)
end
---
local nxt = d_nodenext(curr)
local nxtid = nxt and d_getid(nxt)
if nxtid == glyphnode and is_unicode_vs(d_getchar(nxt)) then
nxt = d_nodenext(nxt)
nxtid = nxt and d_getid(nxt)
end
if eng and nxtid then
local nxtsubtype = d_getsubtype(nxt)
-- adjust next glue by hangul font space
if nxtid == gluenode and nxtsubtype and nxtsubtype == 0 then
local nxtspec = d_getfield(nxt,"spec")
if nxtspec and d_getfield(nxtspec,"writable") and get_font_char(fid,32) then
local sp,st,sh = hangulspaceskip(eng, fid, nxtspec)
if sp and st and sh then
local s = d_get_gluespec(sp, st, sh)
d_setfield(nxt, "spec", s)
d_nodefree(nxtspec)
end
end
-- adjust next italic correction kern
elseif nxtid == kernnode and nxtsubtype == 1 and d_getfield(nxt,"kern") == 0 then
local ksl = get_font_table(fid).parameters.slant
if ksl and ksl > 0 then
d_setfield(nxt,"kern", myfontchar.italic or 0)
end
end
end
break
end
end
if not myfontchar then
nanumtype1font(curr)
end
end
end
end
end
curr = d_nodenext(curr)
end
end
-----------------------------
-- reserve unicode code point
-----------------------------
local function assign_unicode_codevalue (head)
for curr in d_traverse_id(glyphnode, head) do
d_set_attribute(curr, luakounicodeattr, d_getchar(curr))
end
end
-----------------------------
-- reorder hangul tone marks
-----------------------------
local function reorderTM (head)
local curr = d_nodetail(head)
while curr do
if d_getid(curr) == glyphnode then
local uni = d_get_unicode_char(curr)
if uni == 0x302E or uni == 0x302F then
local done = false
local unichar = get_font_char(d_getfont(curr), uni)
if unichar and unichar.width > 0 then
local p = d_nodeprev(curr)
while p and d_getid(p) == glyphnode do
local pc = get_cjk_class(d_get_unicode_char(p))
if pc == 9 then
elseif pc == 7 or pc == 8 then
head = d_remove_node(head,curr)
d_setfield(curr, "prev", nil) -- prev might survive!
head, curr = d_insert_before(head,p,curr)
done = true
break
else
break
end
p = d_nodeprev(p)
end
end
if not done and get_font_char(d_getfont(curr), 0x25CC) then
local u_25CC = d_copy_node(curr)
d_setfield(u_25CC, "char", 0x25CC)
d_insert_after(head, curr, u_25CC)
end
end
end
curr = d_nodeprev(curr)
end
return head
end
----------------------------------
-- add to callback : pre-linebreak
----------------------------------
add_to_callback("hpack_filter", function(head)
head = d_todirect(head)
assign_unicode_codevalue(head)
korean_autojosa(head)
remove_cj_spaceskip(head)
font_substitute(head)
return d_tonode(head)
end, 'luatexko.hpack_filter_first', 1)
add_to_callback('hpack_filter', function(head)
head = d_todirect(head)
if texcount["luakorubyattrcnt"]>0 then get_ruby_side_kern(head) end
cjk_spacing_linebreak(head)
if texcount["luakorubyattrcnt"]>0 then spread_ruby_base_box(head) end
head = compress_fullwidth_punctuations(head)
-- head = no_ruby_at_margin(head)
head = reorderTM(head)
return d_tonode(head)
end, 'luatexko.hpack_filter')
add_to_callback('pre_linebreak_filter', function(head)
head = d_todirect(head)
assign_unicode_codevalue(head)
korean_autojosa(head)
remove_cj_spaceskip(head)
font_substitute(head)
return d_tonode(head)
end, 'luatexko.pre_linebreak_filter_first', 1)
add_to_callback('pre_linebreak_filter', function(head)
head = d_todirect(head)
if texcount["luakorubyattrcnt"]>0 then get_ruby_side_kern(head) end
cjk_spacing_linebreak(head)
if texcount["luakorubyattrcnt"]>0 then spread_ruby_base_box(head) end
head = compress_fullwidth_punctuations(head)
discourage_char_widow(head, d_nodetail(head))
if texcount["luakorubyattrcnt"]>0 then head = no_ruby_at_margin(head) end
head = reorderTM(head)
return d_tonode(head)
end, 'luatexko.pre_linebreak_filter')
--------------------------
-- dot emphasis (드러냄표)
--------------------------
local function after_linebreak_dotemph (head, to_free)
local outer = not to_free
to_free = to_free or {}
for curr in d_traverse(head) do
local currid = d_getid(curr)
if currid == hlistnode then -- hlist may be nested!!!
d_setfield(curr,"head", after_linebreak_dotemph(d_getlist(curr), to_free))
elseif currid == glyphnode then
local attr = d_has_attribute(curr,dotemphattr)
if attr and attr > 0 then
local cc = get_cjk_class(d_get_unicode_char(curr))
if cc and (cc == 0 or cc == 7 or cc == 8) then
local basewd = d_getfield(curr,"width") or 0
if cc == 8 then -- check next char for old hangul jung/jongseong
local nn = d_nodenext(curr)
while nn do
if d_getid(nn) ~= glyphnode then break end
local uni = d_get_unicode_char(nn)
local nc = get_cjk_class(uni)
if nc and nc == 9 and uni ~= 0x302E and uni ~= 0x302F then
basewd = basewd + (d_getfield(nn,"width") or 0)
else
break
end
nn = d_nodenext(nn)
end
end
local dbox = d_todirect(dotemphnode[attr])
local d = d_copy_node(dbox)
local dwidth = d_getfield(d,"width")
local dot = d_get_kernnode(basewd/2-dwidth/2)
d_setfield(dot,"next", d_getlist(d))
d_setfield(d,"head", dot)
d_setfield(d,"width", 0)
head = d_insert_before(head,curr,d)
to_free[dbox] = true
end
d_unset_attribute(curr,dotemphattr)
end
end
end
if outer then
for k in pairs(to_free) do d_nodefree(k) end
end
return head
end
-------------------------------
-- ruby: post-linebreak routine
-------------------------------
local function after_linebreak_ruby (head)
for curr in d_traverse_id(hlistnode,head) do
after_linebreak_ruby(d_getlist(curr)) -- hlist may be nested!!!
local attr = d_has_attribute(curr,luakorubyattr)
if attr then
local ruby = rubynode[attr] and d_todirect(rubynode[attr][1])
if ruby then
local currwidth, rubywidth = d_getfield(curr,"width"), d_getfield(ruby,"width")
local currheight = d_getfield(curr,"height")
if rubywidth < currwidth then
local rubyhead = d_getlist(ruby)
local numofglues = d_nodecount(gluenode,rubyhead)
local extrawidth = (currwidth - rubywidth)/(numofglues + 1)
d_setfield(ruby,"width", currwidth - extrawidth/2)
if numofglues > 0 then
d_setfield(ruby,"head", spread_ruby_box(rubyhead,extrawidth))
end
else
local right = rubynode[attr].rightshift or 0
d_setfield(ruby,"width", currwidth + (rubywidth-currwidth+right)/2)
end
d_setfield(ruby,"shift", -currheight-rubynode[attr][2])
d_insert_after(head,curr,ruby)
d_insert_after(head,curr,d_get_kernnode(-d_getfield(ruby,"width")))
end
rubynode[attr] = nil
d_unset_attribute(curr,luakorubyattr)
end
end
end
---------------------
-- underline emphasis
---------------------
local function draw_underline(head,curr,width,ubox,ulstart)
if width and width > 0 then
local glue = d_get_gluenode(width)
d_setfield(glue,"subtype", 101) -- cleaders
d_setfield(glue,"leader", d_copy_node(ubox))
head = d_insert_before(head, ulstart, glue)
head = d_insert_before(head, ulstart, d_get_kernnode(-width))
end
for _,nd in ipairs({ulstart,curr}) do
if d_getid(nd) == whatsitnode and d_getsubtype(nd) == whatsitspecial then
local nddata = d_getfield(nd,"data")
if nddata and nddata:find("luako:uline") then
head = d_remove_node(head,nd)
d_nodefree(nd)
end
end
end
return head
end
local function after_linebreak_underline(head,glueorder,glueset,gluesign,ulinenum)
local ulstart = ulinenum and head or false
if ulstart and d_getid(ulstart) == gluenode then
ulstart = d_nodenext(ulstart)
end
for curr in d_traverse(head) do
local currid = d_getid(curr)
if currid == hlistnode then
local newhead
newhead,ulinenum = after_linebreak_underline(
d_getlist(curr),
d_getfield(curr,"glue_order"),
d_getfield(curr,"glue_set"),
d_getfield(curr,"glue_sign"),
ulinenum)
d_setfield(curr,"head", newhead)
elseif currid == whatsitnode and d_getsubtype(curr) == whatsitspecial then
local currdata = d_getfield(curr,"data")
if currdata then
if currdata:find("luako:ulinebegin=") then
ulinenum = tonumber(currdata:match("(%d+)"))
ulstart = curr
elseif ulstart and ulinenum and currdata:find('luako:ulineend') then
local ubox = d_todirect(ulinebox[ulinenum])
local wd = d_nodedimensions(glueset,gluesign,glueorder,ulstart,curr)
head = draw_underline(head,curr,wd,ubox,ulstart)
d_nodefree(ubox)
ulinebox[ulinenum] = nil
ulinenum = nil
end
end
end
if ulstart and ulinenum and curr == d_nodetail(head) then
local ubox = d_todirect(ulinebox[ulinenum])
local wd = d_nodedimensions(glueset,gluesign,glueorder,ulstart,curr)
head = draw_underline(head,curr,wd,ubox,ulstart)
end
end
return head, ulinenum
end
-----------------------------------
-- add to callback : post-linebreak
-----------------------------------
add_to_callback('vpack_filter', function(head)
head = d_todirect(head)
if texcount["luakodotemphcnt"]>0 then head = after_linebreak_dotemph(head) end
if texcount["luakorubyattrcnt"]>0 then after_linebreak_ruby(head) end
if texcount["luakoulineboxcnt"]>0 then head = after_linebreak_underline(head) end
return d_tonode(head)
end, 'luatexko.vpack_filter')
add_to_callback("post_linebreak_filter", function(head)
head = d_todirect(head)
if texcount["luakodotemphcnt"]>0 then head = after_linebreak_dotemph(head) end
if texcount["luakorubyattrcnt"]>0 then after_linebreak_ruby(head) end
if texcount["luakoulineboxcnt"]>0 then head = after_linebreak_underline(head) end
return d_tonode(head)
end, 'luatexko.post_linebreak_filter')
------------------------------------
-- vertical typesetting: EXPERIMENTAL
------------------------------------
local tsbtable, mytime, currtime, cachedir, fontloader, lfs, lfsattributes, lfstouch
local function get_vwidth_tsb_table (filename,fontname)
if tsbtable[fontname] then return tsbtable[fontname] end
local cachefile = stringformat("%s/luatexko_vertical_metrics_%s.lua",
cachedir,fontname:gsub("%W","_"))
local cattr = lfs.isfile(cachefile) and lfsattributes(cachefile)
local fonttime = lfsattributes(filename,"modification")
if cattr and cattr.access > mytime and cattr.modification == fonttime then
tsbtable[fontname] = dofile(cachefile)
return tsbtable[fontname]
end
local fnt = fontloader.open(filename,fontname)
if fnt then
local fnt_t = fontloader.to_table(fnt) -- for tsidebearing
fontloader.close(fnt)
local glyph_t = {}
local subfonts = fnt_t.subfonts or {fnt_t}
for _,subfont in ipairs(subfonts) do
local glyphs = subfont.glyphs or {}
for i, gl in pairs(glyphs) do
local id = gl.orig_pos or i
local name = gl.name
if name then
glyph_t[id] = { ht = gl.vwidth, tsb = gl.tsidebearing, vk = gl.vkerns }
glyph_t[name] = id
end
end
end
if lfstouch then
table.tofile(cachefile,glyph_t,"return")
if not lfstouch(cachefile,currtime,fonttime) then
warn("Writing cache file '%s' failed!",cachefile)
end
end
tsbtable[fontname] = glyph_t
return glyph_t
end
end
local function cjk_vertical_font (vf)
if not vf.shared then return end
if not vf.shared.features then return end
if not vf.shared.features["vertical"] then return end
if vf.type == "virtual" then return end
local tsbtable = get_vwidth_tsb_table(vf.filename,vf.fontname)
if not tsbtable then return end
local id = fontdefine(table.copy(vf)) -- fastcopy takes time too long.
vf.type = 'virtual'
vf.fonts = {{ id = id }}
local params = vf.parameters or {}
local shared = vf.shared or {}
local quad = params.quad or 655360
local ascender = params.ascender or quad*0.8
local factor = params.factor or 655.36
local xheight = params.x_height or quad/2
local goffset = xheight/2 - quad/2
local descriptions = shared.rawdata and shared.rawdata.descriptions
local vkrn_tab, id2uni_tab = {}, {}
for i,v in pairs(vf.characters) do
local dsc = descriptions[i]
local gl = v.index
local tsb_gl = tsbtable and tsbtable[gl]
local vw = tsb_gl and tsb_gl.ht; vw = vw and vw * factor or quad
local tsb = tsb_gl and tsb_gl.tsb
local bb4 = dsc and dsc.boundingbox and dsc.boundingbox[4]
local asc = bb4 and tsb and (bb4+tsb)*factor or ascender
local hw = v.width or quad
local offset = hw/2 + goffset
local vh = hw > 0 and hw/2 or nil
v.commands = {
{'right', asc}, -- bbox4 + top_side_bearing
{'down', offset},
{'special', 'pdf: q 0 1 -1 0 0 0 cm'},
{'push'},
{'char', i},
{'pop'},
{'special', 'pdf: Q'},
}
v.width = vw
v.height = vh
v.depth = vh
v.italic = nil
-- for vkrn
local t = id2uni_tab[gl] or {}
t[#t + 1] = i
id2uni_tab[gl] = t
local vk = tsb_gl.vk
if vk then
for _,vv in ipairs(vk) do
local index, off = vv.char, vv.off
index = index and tsbtable and tsbtable[index]
if index and off then
vkrn_tab[i] = vkrn_tab[i] or {}
vkrn_tab[i][index] = off
end
end
end
end
--- vertical gpos
local res = vf.resources or {}
if res.verticalgposhack then
return vf -- avoid multiple running
end
local fea = shared.features or {}
fea.kern = nil -- only for horizontal typesetting
fea.vert = true -- should be activated by default
local vposkeys = {}
local seq = res.sequences or {}
for _,v in ipairs(seq) do
if (v.type == "gpos_single" or v.type == "gpos_pair") and v.subtables then
local feature = v.features or {}
if feature.vhal or feature.vkrn or feature.valt or feature.vpal or feature.vert then
for _,vv in ipairs(v.subtables) do
vposkeys[#vposkeys+1] = vv
end
end
end
end
local lookups = res.lookuphash or {}
for _,v in ipairs(vposkeys) do
local vp = lookups[v]
if vp then
for i,vv in pairs(vp) do
if #vv == 4 then
vp[i] = { -vv[2], vv[1], vv[4], vv[3] }
end
end
else -- vkrn
local t = {}
for first,idofftab in pairs(vkrn_tab) do
for id,off in pairs(idofftab) do
local unis = id2uni_tab[id]
if unis then
for _,second in ipairs(unis) do
t[first] = t[first] or {}
t[first][second] = off
end
end
end
end
lookups[v] = t
end
end
res.verticalgposhack = true
return vf
end
local function activate_vertical_virtual (tfmdata,value)
if value and not tsbtable then
fontloader = require "fontloader"
lfs = require "lfs"
lfstouch = lfs.touch
lfsattributes = lfs.attributes
tsbtable = {}
currtime = os.time()
mytime = kpse_find_file("luatexko.lua")
mytime = mytime and lfsattributes(mytime,"modification")
cachedir = caches.getwritablepath("..","luatexko")
add_to_callback("luaotfload.patch_font",
cjk_vertical_font,
"luatexko.vertical_virtual_font")
end
end
local otffeatures = fonts.constructors.newfeatures("otf")
otffeatures.register {
name = "vertical",
description = "vertical typesetting",
initializers = {
node = activate_vertical_virtual,
}
}
------------------------------------
-- no embedding
------------------------------------
local function dontembedthisfont (tfmdata, value)
if value == "no" then
fonts.constructors.dontembed[tfmdata.properties.filename] = 1
end
end
otffeatures.register {
name = "embedding",
description = "dont embed this font",
initializers = {
base = dontembedthisfont,
node = dontembedthisfont,
}
}
------------------------------------
-- italic correction for fake-slant font
------------------------------------
local function fakeslant_itlc (tfmdata)
local slfactor = tfmdata.parameters.slantfactor
if slfactor and slfactor > 0 then else return end
tfmdata.parameters.slant = slfactor * 65536
local factor = tfmdata.parameters.factor or 655.36
local itlcoff = (tfmdata.shared.rawdata.metadata.uwidth or 40)/2 * factor
local chrs = tfmdata.characters
for i,v in pairs(chrs) do
local italic = v.height * slfactor - itlcoff
if italic > 0 then
chrs[i].italic = italic
end
end
end
add_to_callback("luaotfload.patch_font", fakeslant_itlc, "luatexko.fakeslant_itlc")
------------------------------------
-- Actual Text
------------------------------------
local function actualtext (str)
local t = {}
for uni in string.utfvalues(str) do
if uni < 0x10000 then
t[#t+1] = stringformat("%04X",uni)
else -- surrogate
uni = uni - 0x10000
t[#t+1] = stringformat("%04X%04X", uni/0x400+0xD800, uni%0x400+0xDC00)
end
end
tex.sprint(stringformat("<FEFF%s>", table.concat(t)))
end
luatexko.actualtext = actualtext
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