--
--- luatexja/otf.lua
+-- luatexja/ltj-otf.lua
--
-luatexbase.provides_module({
- name = 'luatexja.otf',
- date = '2011/09/09',
- version = '0.1',
- description = 'The OTF Lua module for LuaTeX-ja',
-})
-module('luatexja.otf', package.seeall)
+require('unicode')
+require('lualibs')
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
luatexja.load_module('rmlgbm'); local ltjr = luatexja.rmlgbm
+luatexja.load_module('charrange'); local ltjc = luatexja.charrange
local id_glyph = node.id('glyph')
local id_whatsit = node.id('whatsit')
local sid_user = node.subtype('user_defined')
-local node_new = node.new
-local node_remove = node.remove
-local node_next = node.next
-local node_free = node.free
-local has_attr = node.has_attribute
-local set_attr = node.set_attribute
-local unset_attr = node.unset_attribute
-local node_insert_after = node.insert_after
+local Dnode = node.direct or node
+
+local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
+local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
+local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
+local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
+--local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
+local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
+local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
+
+local nullfunc = function(n) return n end
+local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
+local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
+
+local node_new = Dnode.new
+local node_remove = luatexja.Dnode_remove -- Dnode.remove
+local node_next = (Dnode ~= node) and Dnode.getnext or node.next
+local node_free = Dnode.free
+local has_attr = Dnode.has_attribute
+local set_attr = Dnode.set_attribute
+local unset_attr = Dnode.unset_attribute
+local node_insert_after = Dnode.insert_after
+local node_write = Dnode.write
+local node_traverse_id = Dnode.traverse_id
+
+local identifiers = fonts.hashes.identifiers
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
-local attr_jchar_class = luatexbase.attributes['ltj@charclass']
local attr_yablshift = luatexbase.attributes['ltj@yablshift']
local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
local ltjf_font_metric_table = ltjf.font_metric_table
local ltjf_find_char_class = ltjf.find_char_class
local ltjr_cidfont_data = ltjr.cidfont_data
+local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
-local OTF = luatexja.userid_table.OTF
+luatexja.userid_table.OTF = luatexbase.newuserwhatsitid('char_by_cid', 'luatexja')
+luatexja.userid_table.VSR = luatexbase.newuserwhatsitid('replace_vs', 'luatexja')
+local OTF, VSR = luatexja.userid_table.OTF, luatexja.userid_table.VSR
-function get_ucs_from_rmlgbm(c)
- local v = ltjr_cidfont_data["Adobe-Japan1"].unicodes["Japan1." .. tostring(c)]
+local function get_ucs_from_rmlgbm(c)
+ local v = ltjr_cidfont_data["Adobe-Japan1"].resources.unicodes["Japan1." .. tostring(c)]
if not v then -- AJ1 範囲外
return 0
elseif v<0xF0000 then -- 素直に Unicode にマップ可能
return 0
end
end
- --print(c, v, w)
end
end
-- Append a whatsit node to the list.
-- This whatsit node will be extracted to a glyph_node
-function append_jglyph(char)
+local function append_jglyph(char)
local p = node_new(id_whatsit,sid_user)
local v = tex.attribute[attr_curjfnt]
- p.user_id=OTF; p.type=100; p.value=char
+ setfield(p, 'user_id', OTF)
+ setfield(p, 'type', 100)
+ setfield(p, 'value', char)
set_attr(p, attr_yablshift, tex.attribute[attr_ykblshift])
- node.write(p)
+ node_write(p)
end
-function cid(key)
- local curjfnt = fonts.ids[tex.attribute[attr_curjfnt]]
+local function cid(key)
+ if key==0 then return append_jglyph(char) end
+ local curjfnt = identifiers[tex.attribute[attr_curjfnt]]
if not curjfnt.cidinfo or
curjfnt.cidinfo.ordering ~= "Japan1" and
curjfnt.cidinfo.ordering ~= "GB1" and
curjfnt.cidinfo.ordering ~= "CNS1" and
curjfnt.cidinfo.ordering ~= "Korea1" then
- ltjb.package_warning('luatexja-otf',
- 'Current Japanese font (or other CJK font) "'
- ..curjfnt.psname..'" is not a CID-Keyed font (Adobe-Japan1 etc.)')
+-- ltjb.package_warning('luatexja-otf',
+-- 'Current Japanese font (or other CJK font) "'
+-- ..curjfnt.psname..'" is not a CID-Keyed font (Adobe-Japan1 etc.)')
return append_jglyph(get_ucs_from_rmlgbm(key))
end
local char = curjfnt.resources.unicodes[curjfnt.cidinfo.ordering..'.'..tostring(key)]
..tostring(key)..')',
'Use a font including the specified CID character.')
char = 0
- return
end
- append_jglyph(char)
+ return append_jglyph(char)
end
-function extract(head)
+local function extract(head)
+ head = to_direct(head)
local p = head
local v
while p do
- if p.id==id_whatsit then
- if p.subtype==sid_user and p.user_id==OTF then
- local g = node_new(id_glyph)
- g.subtype = 0; g.char = p.value
- v = has_attr(p, attr_curjfnt); g.font = v
- set_attr(g, attr_curjfnt, v)
- v = has_attr(p, attr_yablshift)
- if v then
- set_attr(g, attr_yablshift, v)
- else
- unset_attr(g, attr_yablshift)
- end
- head = node_insert_after(head, p, g)
- head = node_remove(head, p)
- node_free(p); p = g
- end
+ if getid(p)==id_whatsit then
+ if getsubtype(p)==sid_user then
+ local puid = getfield(p, 'user_id')
+ if puid==OTF or puid==VSR then
+ local g = node_new(id_glyph)
+ setfield(g, 'subtype', 0)
+ setfield(g, 'char', getfield(p, 'value'))
+ v = has_attr(p, attr_curjfnt); setfield(g, 'font',v)
+ set_attr(g, attr_curjfnt, puid==OTF and v or -1)
+ -- VSR yields ALchar
+ v = has_attr(p, attr_yablshift)
+ if v then
+ set_attr(g, attr_yablshift, v)
+ else
+ unset_attr(g, attr_yablshift)
+ end
+ head = node_insert_after(head, p, g)
+ head = node_remove(head, p)
+ node_free(p); p = g
+ end
+ end
end
p = node_next(p)
end
- return head
+ return to_node(head)
end
-luatexbase.add_to_callback('hpack_filter',
- function (head) return extract(head) end,'ltj.hpack_filter_otf',
+luatexbase.add_to_callback('hpack_filter', extract,
+ 'ltj.hpack_filter_otf',
luatexbase.priority_in_callback('pre_linebreak_filter',
'ltj.pre_linebreak_filter'))
-luatexbase.add_to_callback('pre_linebreak_filter',
- function (head) return extract(head) end, 'ltj.pre_linebreak_filter_otf',
+luatexbase.add_to_callback('pre_linebreak_filter', extract,
+ 'ltj.pre_linebreak_filter_otf',
luatexbase.priority_in_callback('pre_linebreak_filter',
'ltj.pre_linebreak_filter'))
-- これらの文字指定は，和文フォント定義ごとに，それぞれのフォントの
-- CID <-> グリフ 対応状況による変換テーブルが用意される．
--- フォント読み込み時に，CID
+-- 和文フォント読み込み時に，CID -> unicode 対応をとっておく．
local function cid_to_char(fmtable, fn)
- local fi = fonts.ids[fn]
+ local fi = identifiers[fn]
if fi.cidinfo and fi.cidinfo.ordering == "Japan1" then
fmtable.cid_char_type = {}
for i, v in pairs(fmtable.chars) do
luatexbase.add_to_callback("luatexja.find_char_class",
cid_set_char_class, "ltj.otf.find_char_class", 1)
--------------------- all done
+-------------------- IVS
+local font_ivs_table = {} -- key: fontnumber
+local enable_ivs
+do
+ local is_ivs_enabled = false
+ local ivs -- temp table
+ local sort = table.sort
+ local uniq_flag
+ local function add_ivs_table(tg, unitable, glyphmax)
+ for i = 0, glyphmax-1 do
+ if tg[i] then
+ local gv = tg[i]
+ if gv.altuni then
+ for _,at in pairs(gv.altuni) do
+ local bu, vsel = at.unicode, at.variant
+ if vsel then
+ if vsel>=0xE0100 then vsel = vsel - 0xE0100 end
+ if not ivs[bu] then ivs[bu] = {} end
+ uniq_flag = true
+ for i,_ in pairs(ivs[bu]) do
+ if i==vs then uniq_flag = false; break end
+ end
+ if uniq_flag then
+ ivs[bu][vsel] = unitable[gv.name]
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ local function make_ivs_table(id, fname)
+ ivs = {}
+ local fl = fontloader.open(fname)
+ local unicodes = id.resources.unicodes
+ if fl.glyphs then
+ add_ivs_table(fl.glyphs, id.resources.unicodes, fl.glyphmax)
+ end
+ if fl.subfonts then
+ for _,v in pairs(fl.subfonts) do
+ add_ivs_table(v.glyphs, id.resources.unicodes, v.glyphmax)
+ end
+ end
+ fontloader.close(fl)
+ return ivs
+ end
+
+-- loading and saving
+ local font_ivs_basename = {} -- key: basename
+ local cache_ver = 4
+ local checksum = file.checksum
+
+ local function prepare_ivs_data(n, id)
+ -- test if already loaded
+ if type(id)=='number' then -- sometimes id is an integer
+ font_ivs_table[n] = font_ivs_table[id]; return
+ elseif not id then return
+ end
+ local fname = id.filename
+ local bname = file.basename(fname)
+ if not fname then
+ font_ivs_table[n] = {}; return
+ elseif font_ivs_basename[bname] then
+ font_ivs_table[n] = font_ivs_basename[bname]; return
+ end
+
+ -- if the cache is present, read it
+ local newsum = checksum(fname) -- MD5 checksum of the fontfile
+ local v = "ivs_" .. string.lower(file.nameonly(fname))
+ local dat = ltjb.load_cache(v,
+ function (t) return (t.version~=cache_ver) or (t.chksum~=newsum) end
+ )
+ -- if the cache is not found or outdated, save the cache
+ if dat then
+ font_ivs_basename[bname] = dat[1] or {}
+ else
+ dat = make_ivs_table(id, fname)
+ font_ivs_basename[bname] = dat or {}
+ ltjb.save_cache( v,
+ {
+ chksum = checksum(fname),
+ version = cache_ver,
+ dat,
+ })
+ end
+ font_ivs_table[n] = font_ivs_basename[bname]
+ end
+
+-- 組版時
+ local function ivs_jglyph(char, bp, pf, uid)
+ local p = node_new(id_whatsit,sid_user)
+ setfield(p, 'user_id', uid)
+ setfield(p, 'type', 100)
+ setfield(p, 'value', char)
+ set_attr(p, attr_curjfnt, pf)
+ set_attr(p, attr_yablshift, has_attr(bp, attr_ykblshift) or 0)
+ return p
+ end
+
+ local function do_ivs_repr(head)
+ head = to_direct(head)
+ local p, r = head
+ while p do
+ local pid = getid(p)
+ if pid==id_glyph then
+ local pf = getfont(p)
+ local q = node_next(p) -- the next node of p
+ if q and getid(q)==id_glyph then
+ local qc = getchar(q)
+ if (qc>=0xFE00 and qc<=0xFE0F) or (qc>=0xE0100 and qc<0xE01F0) then
+ -- q is a variation selector
+ if qc>=0xE0100 then qc = qc - 0xE0100 end
+ local pt = font_ivs_table[pf]
+ pt = pt and pt[getchar(p)]; pt = pt and pt[qc]
+ head, r = node_remove(head,q)
+ node_free(q)
+ if pt then
+ local np = ivs_jglyph(pt, p, pf,
+ (has_attr(p,attr_curjfnt) or 0)==pf and OTF or VSR)
+ head = node_insert_after(head, p, np)
+ head = node_remove(head,p)
+ node_free(p)
+ end
+ p = r
+ else
+ p = q
+ end
+ else
+ p = node_next(p)
+ end
+ else
+ p = node_next(p)
+ end
+ end
+ return to_node(head)
+ end
+
+ -- font define
+ local function font_callback(name, size, id, fallback)
+ local d = fallback(name, size, id)
+ prepare_ivs_data(id, d)
+ return d
+ end
+
+ enable_ivs = function ()
+ if is_ivs_enabled then
+ ltjb.package_warning('luatexja-otf',
+ 'luatexja.otf.enable_ivs() was already called, so this call is ignored', '')
+ else
+ luatexbase.add_to_callback('hpack_filter',
+ do_ivs_repr,'do_ivs', 1)
+ luatexbase.add_to_callback('pre_linebreak_filter',
+ do_ivs_repr, 'do_ivs', 1)
+ local ivs_callback = function (name, size, id)
+ return font_callback(
+ name, size, id,
+ function (name, size, id) return luatexja.font_callback(name, size, id) end
+ )
+ end
+ luatexbase.add_to_callback('define_font',ivs_callback,"luatexja.ivs_font_callback", 1)
+ for i=1,font.nextid()-1 do
+ if identifiers[i] then prepare_ivs_data(i, identifiers[i]) end
+ end
+ is_ivs_enabled = true
+ end
+ end
+end
+
+luatexja.otf = {
+ append_jglyph = append_jglyph,
+ enable_ivs = enable_ivs, -- 隠し機能: IVS
+ font_ivs_table = font_ivs_table,
+ cid = cid,
+}
+
-- EOF
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