--- /dev/null
+--
+-- luatexja/ltj-jfmglue.lua
+--
+luatexbase.provides_module({
+ name = 'luatexja.jfmglue',
+ date = '2015/05/03',
+ description = 'Insertion process of JFM glues and kanjiskip',
+})
+module('luatexja.jfmglue', package.seeall)
+local err, warn, info, log = luatexbase .errwarinf(_NAME)
+
+luatexja.load_module('base'); local ltjb = luatexja.base
+luatexja.load_module('stack'); local ltjs = luatexja.stack
+luatexja.load_module('jfont'); local ltjf = luatexja.jfont
+luatexja.load_module('direction'); local ltjd = luatexja.direction
+luatexja.load_module('setwidth'); local ltjw = luatexja.setwidth
+local pairs = pairs
+
+local Dnode = node.direct or node
+
+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 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 has_attr = Dnode.has_attribute
+local set_attr = Dnode.set_attribute
+local insert_before = Dnode.insert_before
+local insert_after = Dnode.insert_after
+local node_next = (Dnode ~= node) and Dnode.getnext or node.next
+local round = tex.round
+local ltjd_make_dir_whatsit = ltjd.make_dir_whatsit
+local ltjf_font_metric_table = ltjf.font_metric_table
+local ltjf_find_char_class = ltjf.find_char_class
+local node_new = Dnode.new
+local node_copy = Dnode.copy
+local node_remove = Dnode.remove
+local node_tail = Dnode.tail
+local node_free = Dnode.free
+local node_end_of_math = Dnode.end_of_math
+
+local id_glyph = node.id('glyph')
+local id_hlist = node.id('hlist')
+local id_vlist = node.id('vlist')
+local id_rule = node.id('rule')
+local id_ins = node.id('ins')
+local id_mark = node.id('mark')
+local id_adjust = node.id('adjust')
+local id_disc = node.id('disc')
+local id_whatsit = node.id('whatsit')
+local id_math = node.id('math')
+local id_glue = node.id('glue')
+local id_kern = node.id('kern')
+local id_penalty = node.id('penalty')
+
+local id_glue_spec = node.id('glue_spec')
+local id_jglyph = 512 -- Japanese character
+local id_box_like = 256 -- vbox, shifted hbox
+local id_pbox = 257 -- already processed nodes (by \unhbox)
+local id_pbox_w = 258 -- cluster which consists of a whatsit
+local sid_user = node.subtype('user_defined')
+local lang_ja = luatexja.lang_ja
+
+local sid_start_link = node.subtype('pdf_start_link')
+local sid_start_thread = node.subtype('pdf_start_thread')
+local sid_end_link = node.subtype('pdf_end_link')
+local sid_end_thread = node.subtype('pdf_end_thread')
+
+local ITALIC = luatexja.icflag_table.ITALIC
+local PACKED = luatexja.icflag_table.PACKED
+local KINSOKU = luatexja.icflag_table.KINSOKU
+local FROM_JFM = luatexja.icflag_table.FROM_JFM
+local PROCESSED = luatexja.icflag_table.PROCESSED
+local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
+local BOXBDD = luatexja.icflag_table.BOXBDD
+local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
+
+local attr_icflag = luatexbase.attributes['ltj@icflag']
+local kanji_skip
+local xkanji_skip
+local table_current_stack
+local list_dir
+local capsule_glyph
+local tex_dir
+local attr_ablshift
+local set_np_xspc_jachar
+local set_np_xspc_jachar_hbox
+
+local ltjs_orig_char_table = ltjs.orig_char_table
+
+local function get_attr_icflag(p)
+ return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
+end
+
+-------------------- Helper functions
+
+-- This function is called only for acquiring `special' characters.
+local function fast_find_char_class(c,m)
+ return m.chars[c] or 0
+end
+
+-- 文字クラスの決定
+local slow_find_char_class
+do
+ local start_time_measure = ltjb.start_time_measure
+ local stop_time_measure = ltjb.stop_time_measure
+ slow_find_char_class = function (c, m, oc)
+ local cls = ltjf_find_char_class(oc, m)
+ if oc~=c and c and cls==0 then
+ return ltjf_find_char_class(c, m)
+ else
+ return cls
+ end
+ end
+end
+
+local zero_glue = node_new(id_glue)
+spec_zero_glue = to_node(node_new(id_glue_spec))
+ -- must be public, since mentioned from other sources
+local spec_zero_glue = to_direct(spec_zero_glue)
+setfield(spec_zero_glue, 'width', 0)
+setfield(spec_zero_glue, 'stretch', 0)
+setfield(spec_zero_glue, 'shrink', 0)
+setfield(spec_zero_glue, 'stretch_order', 0)
+setfield(spec_zero_glue, 'shrink_order', 0)
+setfield(zero_glue, 'spec', spec_zero_glue)
+
+local function skip_table_to_spec(n)
+ local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
+ setfield(g, 'width', st.width)
+ setfield(g, 'stretch', st.stretch)
+ setfield(g, 'shrink', st.shrink)
+ setfield(g, 'stretch_order', st.stretch_order)
+ setfield(g, 'shrink_order', st.shrink_order)
+ return g
+end
+
+
+-- penalty 値の計算
+local function add_penalty(p,e)
+ local pp = getfield(p, 'penalty')
+ if pp>=10000 then
+ if e<=-10000 then setfield(p, 'penalty', 0) end
+ elseif pp<=-10000 then
+ if e>=10000 then setfield(p, 'penalty', 0) end
+ else
+ pp = pp + e
+ if pp>=10000 then setfield(p, 'penalty', 10000)
+ elseif pp<=-10000 then setfield(p, 'penalty', -10000)
+ else setfield(p, 'penalty', pp) end
+ end
+end
+
+-- 「異なる JFM」の間の調整方法
+diffmet_rule = math.two_paverage
+function math.two_add(a,b) return a+b end
+function math.two_average(a,b) return (a+b)*0.5 end
+function math.two_paverage(a,b) return (a+b)/2 end
+function math.two_pleft(a,b) return a end
+function math.two_pright(a,b) return b end
+
+local head -- the head of current list
+
+local Np, Nq, Bp
+local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
+
+local non_ihb_flag -- JFM グルー挿入抑止用 flag
+-- false: \inhibitglue 指定時 true: それ以外
+
+-------------------- hlist 内の文字の検索
+
+local first_char, last_char, find_first_char
+do
+local ltjd_glyph_from_packed = ltjd.glyph_from_packed
+local function check_box(box_ptr, box_end)
+ local p = box_ptr; local found_visible_node = false
+ if not p then
+ find_first_char = false; last_char = nil
+ return true
+ end
+ while p and p~=box_end do
+ local pid = getid(p)
+ if pid==id_kern and getsubtype(p)==2 then
+ p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
+ end
+ if pid==id_glyph then
+ repeat
+ if find_first_char then
+ first_char = p; find_first_char = false
+ end
+ last_char = p; found_visible_node = true; p=node_next(p)
+ if (not p) or p==box_end then
+ return found_visible_node
+ end
+ until getid(p)~=id_glyph
+ pid = getid(p) -- p must be non-nil
+ end
+ if pid==id_kern then
+ local pa = get_attr_icflag(p)
+ if pa==IC_PROCESSED then
+ -- do nothing
+ elseif getsubtype(p)==2 then
+ p = node_next(node_next(p));
+ -- Note that another node_next will be executed outside this if-statement.
+ else
+ found_visible_node = true
+ find_first_char = false; last_char = nil
+ end
+ elseif pid==id_hlist then
+ if PACKED == get_attr_icflag(p) then
+ local s = ltjd_glyph_from_packed(p)
+ if find_first_char then
+ first_char = s; find_first_char = false
+ end
+ last_char = s; found_visible_node = true
+ else
+ if getfield(p, 'shift')==0 then
+ last_char = nil
+ if check_box(getlist(p), nil) then found_visible_node = true end
+ else
+ find_first_char = false; last_char = nil
+ end
+ end
+ elseif pid==id_math then
+ if find_first_char then
+ first_char = p; find_first_char = false
+ end
+ last_char = p; found_visible_node = true
+ elseif pid==id_rule and get_attr_icflag(p)==PACKED then
+ -- do nothing
+ elseif not (pid==id_ins or pid==id_mark
+ or pid==id_adjust or pid==id_whatsit
+ or pid==id_penalty) then
+ found_visible_node = true
+ find_first_char = false; last_char = nil
+ end
+ p = node_next(p)
+ end
+ return found_visible_node
+end
+
+function check_box_high(Nx, box_ptr, box_end)
+ first_char = nil; last_char = nil; find_first_char = true
+ if check_box(box_ptr, box_end) then
+ local first_char = first_char
+ if first_char then
+ if getid(first_char)==id_glyph then
+ if getfield(first_char, 'lang') == lang_ja then
+ set_np_xspc_jachar_hbox(Nx, first_char)
+ else
+ set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
+ end
+ else -- math_node
+ set_np_xspc_alchar(Nx, -1,first_char)
+ end
+ end
+ end
+ return last_char
+end
+end
+-------------------- Np の計算と情報取得
+
+luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
+ function (Np, lp, Nq)
+ if Np.nuc then return Np
+ else
+ return Np -- your code
+ end
+ end)
+luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
+ function (stat, Nq, Np) return false end)
+
+-- calc next Np
+local calc_np
+do
+
+local traverse = Dnode.traverse
+local function check_next_ickern(lp)
+ if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
+ set_attr(lp, attr_icflag, IC_PROCESSED)
+ Np.last = lp; return node_next(lp)
+ else
+ Np.last = Np.nuc; return lp
+ end
+end
+
+local function calc_np_pbox(lp, last)
+ local first, lpa, nc = (not Np.first), KINSOKU, nil
+ Np.first = Np.first or lp; Np.id = id_pbox
+ set_attr(lp, attr_icflag, get_attr_icflag(lp));
+ while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
+ if getid(lp)==id_hlist or getid(lp)==id_vlist then
+ head, lp, nc = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm pbox')
+ Np.first = first and nc or Np.first
+ else
+ nc, lp = lp, node_next(lp)
+ end
+ first, lpa = false, (lp and has_attr(lp, attr_icflag) or 0)
+ -- get_attr_icflag() ではいけない！
+ end
+ Np.nuc = nc
+ lp = check_next_ickern(lp)
+ Np.last_char = check_box_high(Np, Np.first, lp)
+ return lp
+end
+
+local ltjw_apply_ashift_math = ltjw.apply_ashift_math
+local ltjw_apply_ashift_disc = ltjw.apply_ashift_disc
+local min, max = math.min, math.max
+local function calc_np_aux_glyph_common(lp)
+ Np.nuc = lp
+ Np.first= (Np.first or lp)
+ if getfield(lp, 'lang') == lang_ja then
+ Np.id = id_jglyph
+ local m, cls = set_np_xspc_jachar(Np, lp)
+ local npi, npf
+ lp, head, npi, npf = capsule_glyph(lp, m, cls, head, tex_dir, lp)
+ Np.first = (Np.first~=Np.nuc) and Np.first or npf or npi
+ Np.nuc = npi
+ return true, check_next_ickern(lp);
+ else
+ Np.id = id_glyph
+ set_np_xspc_alchar(Np, getchar(lp), lp, 1)
+ -- loop
+ local first_glyph, last_glyph = lp
+ set_attr(lp, attr_icflag, PROCESSED); Np.last = lp
+ local y_adjust = has_attr(lp,attr_ablshift) or 0
+ local node_depth = getfield(lp, 'depth') + min(y_adjust, 0)
+ local adj_depth = (y_adjust>0) and (getfield(lp, 'depth') + y_adjust) or 0
+ setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
+ lp = node_next(lp)
+ for lx in traverse(lp) do
+ local lai = get_attr_icflag(lx)
+ if lx==last or lai>=PACKED then
+ lp=lx; break
+ else
+ local lid = getid(lx)
+ if lid==id_glyph and getfield(lx, 'lang') ~= lang_ja then
+ -- 欧文文字
+ last_glyph = lx; set_attr(lx, attr_icflag, PROCESSED); Np.last = lx
+ y_adjust = has_attr(lx,attr_ablshift) or 0
+ node_depth = max(getfield(lx, 'depth') + min(y_adjust, 0), node_depth)
+ adj_depth = (y_adjust>0) and max(getfield(lx, 'depth') + y_adjust, adj_depth) or adj_depth
+ setfield(lx, 'yoffset', getfield(lx, 'yoffset') - y_adjust)
+ elseif lid==id_kern then
+ local ls = getsubtype(lx)
+ if ls==2 then -- アクセント用の kern
+ set_attr(lx, attr_icflag, PROCESSED)
+ lx = node_next(lx) -- lp: アクセント本体
+ setfield(lx, 'yoffset', getfield(lp, 'yoffset') - (has_attr(lx,attr_ablshift) or 0))
+ lx = node_next(node_next(lx))
+ elseif ls==0 then
+ Np.last = lx
+ elseif (ls==1 and lai==ITALIC) then
+ Np.last = lx; set_attr(lx, attr_icflag, IC_PROCESSED)
+ else
+ lp=lx; break
+ end
+ else
+ lp=lx; break
+ end
+ end
+ end
+ local r
+ if adj_depth>node_depth then
+ r = node_new(id_rule)
+ setfield(r, 'width', 0); setfield(r, 'height', 0)
+ setfield(r, 'depth',adj_depth); setfield(r, 'dir', tex_dir)
+ set_attr(r, attr_icflag, PROCESSED)
+ end
+ if last_glyph then
+ Np.last_char = last_glyph
+ if r then insert_after(head, first_glyph, r) end
+ else
+ local npn = Np.nuc
+ Np.last_char = npn
+ if r then
+ local nf, nc = getfont(npn), getchar(npn)
+ local ct = (font.getfont(nf) or font.fonts[nf] ).characters[nc]
+ if not ct then -- variation selector
+ node_free(r)
+ elseif (ct.left_protruding or 0) == 0 then
+ head = insert_before(head, npn, r)
+ Np.first = (Np.first==npn) and r or npn
+ elseif (ct.right_protruding or 0) == 0 then
+ insert_after(head, npn, r); Np.last, lp = r, r
+ else
+ ltjb.package_warning_no_line(
+ 'luatexja',
+ 'Check depth of glyph node ' .. tostring(npn) .. '(font=' .. nf
+ .. ', char=' .. nc .. '), because its \\lpcode is ' .. tostring(ct.left_protruding)
+ .. ' and its \\rpcode is ' .. tostring(ct.right_protruding)
+ ); node_free(r)
+ end
+ end
+ end
+ return true, lp
+ end
+end
+local calc_np_auxtable = {
+ [id_glyph] = calc_np_aux_glyph_common,
+ [id_hlist] = function(lp)
+ local op, flag
+ head, lp, op, flag = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm hlist')
+ set_attr(op, attr_icflag, PROCESSED)
+ Np.first = Np.first or op; Np.last = op; Np.nuc = op;
+ if (flag or getfield(op, 'shift')~=0) then
+ Np.id = id_box_like
+ else
+ Np.id = id_hlist
+ Np.last_char = check_box_high(Np, getlist(op), nil)
+ end
+ return true, lp
+ end,
+ [id_vlist] = function(lp)
+ local op
+ head, lp, op = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm:' .. getid(lp))
+ Np.first = Np.first or op; Np.last = op; Np.nuc = op;
+ Np.id = id_box_like;
+ return true, lp
+ end,
+ box_like = function(lp)
+ Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
+ Np.id = id_box_like;
+ return true, node_next(lp)
+ end,
+ skip = function(lp)
+ set_attr(lp, attr_icflag, PROCESSED)
+ return false, node_next(lp)
+ end,
+ [id_whatsit] = function(lp)
+ local lps = getsubtype(lp)
+ if lps==sid_user then
+ if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
+ local lq = node_next(lp);
+ head = node_remove(head, lp); node_free(lp); non_ihb_flag = false
+ return false, lq;
+ else
+ set_attr(lp, attr_icflag, PROCESSED)
+ luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
+ Np, lp, Nq)
+ if Np.nuc then
+ Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
+ return true, node_next(lp)
+ else
+ return false, node_next(lp)
+ end
+ end
+ else
+ -- we do special treatment for these whatsit nodes.
+ if lps == sid_start_link or lps == sid_start_thread then
+ Np.first = lp
+ elseif lps == sid_end_link or lps == sid_end_thread then
+ Np.first, Nq.last = nil, lp;
+ end
+ set_attr(lp, attr_icflag, PROCESSED)
+ return false, node_next(lp)
+ end
+ end,
+ [id_math] = function(lp)
+ Np.first, Np.nuc = (Np.first or lp), lp;
+ set_attr(lp, attr_icflag, PROCESSED)
+ set_np_xspc_alchar(Np, -1, lp)
+ local end_math = node_end_of_math(lp)
+ ltjw_apply_ashift_math(lp, end_math, attr_ablshift)
+ set_attr(end_math, attr_icflag, PROCESSED)
+ Np.last, Np.id = end_math, id_math;
+ return true, node_next(end_math);
+ end,
+ [id_glue] = function(lp)
+ Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
+ Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
+ return true, node_next(lp)
+ end,
+ [id_disc] = function(lp)
+ Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
+ Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
+ ltjw_apply_ashift_disc(lp, (list_dir==dir_tate), tex_dir)
+ Np.last_char = check_box_high(Np, getfield(lp, 'replace'), nil)
+ return true, node_next(lp)
+ end,
+ [id_kern] = function(lp)
+ if getsubtype(lp)==2 then
+ Np.first = Np.first or lp
+ set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
+ set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
+ set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
+ set_attr(lp, attr_icflag, PROCESSED);
+ return calc_np_aux_glyph_common(lp)
+ else
+ Np.first = Np.first or lp
+ Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
+ Np.last = lp; return true, node_next(lp)
+ end
+ end,
+ [id_penalty] = function(lp)
+ Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
+ return false, node_next(lp)
+ end,
+}
+calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
+calc_np_auxtable[13] = calc_np_auxtable.box_like
+calc_np_auxtable[id_ins] = calc_np_auxtable.skip
+calc_np_auxtable[id_mark] = calc_np_auxtable.skip
+calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
+
+function calc_np(last, lp)
+ local k
+ -- We assume lp = node_next(Np.last)
+ Np, Nq, non_ihb_flag = Nq, Np, true
+ -- We clear `predefined' entries of Np before pairs() loop,
+ -- because using only pairs() loop is slower.
+ Np.post, Np.pre, Np.xspc = nil, nil, nil
+ Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
+ Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
+ for k in pairs(Np) do Np[k] = nil end
+
+ for k = 1,#Bp do Bp[k] = nil end
+ while lp ~= last do
+ local lpa = has_attr(lp, attr_icflag) or 0
+ -- unbox 由来ノードの検出
+ if lpa>=PACKED then
+ if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
+ local lq = node_next(lp)
+ head = node_remove(head, lp); node_free(lp); lp = lq
+ else
+ return calc_np_pbox(lp, last)
+ end -- id_pbox
+ else
+ k, lp = calc_np_auxtable[getid(lp)](lp)
+ if k then return lp end
+ end
+ end
+ Np=nil
+end
+end
+
+-- extract informations from Np
+-- We think that "Np is a Japanese character" if Np.met~=nil,
+-- "Np is an alphabetic character" if Np.pre~=nil,
+-- "Np is not a character" otherwise.
+after_hlist = nil -- global
+local after_alchar, extract_np
+do
+ local PRE = luatexja.stack_table_index.PRE
+ local POST = luatexja.stack_table_index.POST
+ local KCAT = luatexja.stack_table_index.KCAT
+ local XSP = luatexja.stack_table_index.XSP
+ local dir_tate = luatexja.dir_table.dir_tate
+
+-- 和文文字のデータを取得
+ local attr_jchar_class = luatexbase.attributes['ltj@charclass']
+ local attr_jchar_code = luatexbase.attributes['ltj@charcode']
+ local attr_autospc = luatexbase.attributes['ltj@autospc']
+ local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
+ --local ltjf_get_vert_glyph = ltjf.get_vert_glyph
+ function set_np_xspc_jachar(Nx, x)
+ local m = ltjf_font_metric_table[getfont(x)]
+ local c, c_glyph = ltjs_orig_char_table[x], getchar(x)
+ c = c or c_glyph
+ local cls = slow_find_char_class(c, m, c_glyph)
+ Nx.met, Nx.class, Nx.char = m, cls, c;
+ if cls~=0 then set_attr(x, attr_jchar_class, cls) end
+ if c~=c_glyph then set_attr(x, attr_jchar_code, c) end
+ Nx.pre = table_current_stack[PRE + c] or 0
+ Nx.post = table_current_stack[POST + c] or 0
+ Nx.xspc = table_current_stack[XSP + c] or 3
+ Nx.kcat = table_current_stack[KCAT + c] or 0
+ Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
+ return m, cls
+ end
+ function set_np_xspc_jachar_hbox(Nx, x)
+ local m = ltjf_font_metric_table[getfont(x)]
+ local c = has_attr(x, attr_jchar_code) or getchar(x)
+ Nx.met, Nx.char = m, c; Nx.class = has_attr(x, attr_jchar_class) or 0;
+ Nx.pre = table_current_stack[PRE + c] or 0
+ Nx.post = table_current_stack[POST + c] or 0
+ Nx.xspc = table_current_stack[XSP + c] or 3
+ Nx.kcat = table_current_stack[KCAT + c] or 0
+ Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
+ end
+
+-- 欧文文字のデータを取得
+ local floor = math.floor
+ function set_np_xspc_alchar(Nx, c,x, lig)
+ if c~=-1 then
+ local f = (lig ==1) and nullfunc or node_tail
+ local xc, xs = getfield(x, 'components'), getsubtype(x)
+ while xc and xs and xs%4>=2 do
+ x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
+ end
+ c = getchar(x)
+ Nx.pre = table_current_stack[PRE + c] or 0
+ Nx.post = table_current_stack[POST + c] or 0
+ Nx.xspc = table_current_stack[XSP + c] or 3
+ else
+ Nx.pre, Nx.post = 0, 0
+ Nx.xspc = table_current_stack[XSP - 1] or 3
+ end
+ Nx.met = nil
+ Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
+ end
+ local set_np_xspc_alchar = set_np_xspc_alchar
+
+ -- change the information for the next loop
+ -- (will be done if Nx is an alphabetic character or a hlist)
+ after_hlist = function (Nx)
+ local s = Nx.last_char
+ if s then
+ if getid(s)==id_glyph then
+ if getfield(s, 'lang') == lang_ja then
+ set_np_xspc_jachar_hbox(Nx, s)
+ else
+ set_np_xspc_alchar(Nx, getchar(s), s, 2)
+ end
+ else
+ set_np_xspc_alchar(Nx, -1, s)
+ end
+ else
+ Nx.pre, Nx.met = nil, nil
+ end
+ end
+
+ after_alchar = function (Nx)
+ local x = Nx.last_char
+ return set_np_xspc_alchar(Nx, getchar(x), x, 2)
+ end
+
+end
+
+-------------------- 最下層の処理
+
+-- change penalties (or create a new penalty, if needed)
+local function handle_penalty_normal(post, pre, g)
+ local a = (pre or 0) + (post or 0)
+ if #Bp == 0 then
+ if (a~=0 and not(g and getid(g)==id_kern)) then
+ local p = node_new(id_penalty)
+ if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
+ setfield(p, 'penalty', a)
+ head = insert_before(head, Np.first, p)
+ Bp[1]=p;
+ set_attr(p, attr_icflag, KINSOKU)
+ end
+ else for _, v in pairs(Bp) do add_penalty(v,a) end
+ end
+end
+
+local function handle_penalty_always(post, pre, g)
+ local a = (pre or 0) + (post or 0)
+ if #Bp == 0 then
+ if not (g and getid(g)==id_glue) or a~=0 then
+ local p = node_new(id_penalty)
+ if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
+ setfield(p, 'penalty', a)
+ head = insert_before(head, Np.first, p)
+ Bp[1]=p
+ set_attr(p, attr_icflag, KINSOKU)
+ end
+ else for _, v in pairs(Bp) do add_penalty(v,a) end
+ end
+end
+
+local function handle_penalty_suppress(post, pre, g)
+ local a = (pre or 0) + (post or 0)
+ if #Bp == 0 then
+ if g and getid(g)==id_glue then
+ local p = node_new(id_penalty)
+ setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
+ Bp[1]=p
+ set_attr(p, attr_icflag, KINSOKU)
+ end
+ else for _, v in pairs(Bp) do add_penalty(v,a) end
+ end
+end
+
+-- 和文文字間の JFM glue を node 化
+local function new_jfm_glue(m, bc, ac)
+-- bc, ac: char classes
+ local g = m.char_type[bc][ac]
+ if g then
+ if g[1] then
+ local f = node_new(id_glue)
+ set_attr(f, attr_icflag, g[4])
+ setfield(f, 'spec', node_copy(g[2]))
+ return f, g[3]
+ else
+ return node_copy(g[2]), g[3]
+ end
+ end
+ return nil, 0
+end
+
+-- Nq.last (kern w) .... (glue/kern g) Np.first
+local function real_insert(g)
+ if g then
+ head = insert_before(head, Np.first, g)
+ Np.first = g
+ end
+end
+
+
+-------------------- 和文文字間空白量の決定
+local null_skip_table = {0, 0, 0}
+-- get kanjiskip
+local get_kanjiskip
+local get_kanjiskip_normal, get_kanjiskip_jfm
+do
+ local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
+ local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
+ get_kanjiskip_normal = function ()
+ if Np.auto_kspc or Nq.auto_kspc then
+ return node_copy(kanji_skip)
+ else
+ local g = node_copy(zero_glue)
+ set_attr(g, attr_icflag, KANJI_SKIP)
+ return g
+ end
+ end
+
+ get_kanjiskip_jfm = function ()
+ local g
+ if Np.auto_kspc or Nq.auto_kspc then
+ g = node_new(id_glue); --copy_attr(g, Nq.nuc)
+ local gx = node_new(id_glue_spec);
+ setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
+ local pm, qm = Np.met, Nq.met
+ local bk = qm.kanjiskip or null_skip_table
+ if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
+ setfield(gx, 'width', bk[1])
+ setfield(gx, 'stretch', bk[2])
+ setfield(gx, 'shrink', bk[3])
+ else
+ local ak = pm.kanjiskip or null_skip_table
+ setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
+ setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
+ setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
+ end
+ setfield(g, 'spec', gx)
+ else
+ g = node_copy(zero_glue)
+ end
+ set_attr(g, attr_icflag, KANJI_SKIP_JFM)
+ return g
+ end
+end
+
+local calc_ja_ja_aux
+do
+ local bg_ag = 2*id_glue - id_glue
+ local bg_ak = 2*id_glue - id_kern
+ local bk_ag = 2*id_kern - id_glue
+ local bk_ak = 2*id_kern - id_kern
+
+ calc_ja_ja_aux = function (gb,ga, db, da)
+ local rbb, rab = 0.5*(1-db), 0.5*(1-da) -- 「前の文字」由来のグルーの割合
+ local rba, raa = 0.5*(1+db), 0.5*(1+da) -- 「前の文字」由来のグルーの割合
+ if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
+ and diffmet_rule ~= math.two_paverage then
+ rbb, rab, rba, raa = 1,0,0,1
+ end
+ if not gb then
+ if ga then
+ gb = node_new(id_kern); setfield(gb, 'kern', 0)
+ else return nil end
+ elseif not ga then
+ ga = node_new(id_kern); setfield(ga, 'kern', 0)
+ end
+
+ local k = 2*getid(gb) - getid(ga)
+ if k == bg_ag then
+ local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
+ -- 両方とも glue．
+ local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
+ setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
+ bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
+ setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
+ bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
+ setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
+ node_free(ga)
+ return gb
+ elseif k == bk_ak then
+ -- 両方とも kern．
+ local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
+ setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
+ node_free(ga)
+ return gb
+ elseif k == bk_ag then
+ local as = getfield(ga, 'spec')
+ -- gb: kern, ga: glue
+ local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
+ setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
+ ad = getfield(as, 'stretch')
+ setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
+ ad = getfield(as, 'shrink')
+ setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
+ node_free(gb)
+ return ga
+ else
+ local bs = getfield(gb, 'spec')
+ -- gb: glue, ga: kern
+ local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
+ setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
+ bd = getfield(bs, 'stretch')
+ setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
+ bd = getfield(bs, 'shrink')
+ setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
+ node_free(ga)
+ return gb
+ end
+ end
+end
+
+local function calc_ja_ja_glue()
+ local qm, pm = Nq.met, Np.met
+ if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
+ return new_jfm_glue(qm, Nq.class, Np.class)
+ else
+ local npn, nqn = Np.nuc, Nq.nuc
+ local gb, db = new_jfm_glue(qm, Nq.class,
+ slow_find_char_class(Np.char,
+ qm, getchar(npn)))
+ local ga, da = new_jfm_glue(pm,
+ slow_find_char_class(Nq.char,
+ pm, getchar(nqn)),
+ Np.class)
+ return calc_ja_ja_aux(gb, ga, db, da);
+ end
+end
+
+-------------------- 和欧文間空白量の決定
+
+-- get xkanjiskip
+local get_xkanjiskip
+local get_xkanjiskip_normal, get_xkanjiskip_jfm
+do
+ local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
+ local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
+ get_xkanjiskip_normal = function (Nn)
+ if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
+ return node_copy(xkanji_skip)
+ else
+ local g = node_copy(zero_glue)
+ set_attr(g, attr_icflag, XKANJI_SKIP)
+ return g
+ end
+ end
+ get_xkanjiskip_jfm = function (Nn)
+ local g
+ if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
+ g = node_new(id_glue)
+ local gx = node_new(id_glue_spec);
+ setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
+ local bk = Nn.met.xkanjiskip or null_skip_table
+ setfield(gx, 'width', bk[1])
+ setfield(gx, 'stretch', bk[2])
+ setfield(gx, 'shrink', bk[3])
+ setfield(g, 'spec', gx)
+ else
+ g = node_copy(zero_glue)
+ end
+ set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
+ return g
+ end
+end
+
+-------------------- 隣接した「塊」間の処理
+
+local function get_OA_skip()
+ local pm = Np.met
+ return new_jfm_glue(pm,
+ fast_find_char_class((Nq.id == id_math and -1 or 'jcharbdd'), pm), Np.class)
+end
+local function get_OB_skip()
+ local qm = Nq.met
+ return new_jfm_glue(qm, Nq.class,
+ fast_find_char_class((Np.id == id_math and -1 or'jcharbdd'), qm))
+end
+
+-- (anything) .. jachar
+local function handle_np_jachar(mode)
+ local qid = Nq.id
+ if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
+ local g = non_ihb_flag and calc_ja_ja_glue() or get_kanjiskip() -- M->K
+ handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
+ elseif Nq.met then -- qid==id_hlist
+ local g = non_ihb_flag and get_OA_skip() or get_kanjiskip() -- O_A->K
+ handle_penalty_normal(0, Np.pre, g); real_insert(g)
+ elseif Nq.pre then
+ local g = non_ihb_flag and get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
+ handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
+ else
+ local g = non_ihb_flag and get_OA_skip() -- O_A
+ if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
+ elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
+ else handle_penalty_always(0, Np.pre, g)
+ end
+ real_insert(g)
+ end
+ if mode and Np.kcat%2~=1 then
+ widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
+ end
+end
+
+
+-- jachar .. (anything)
+local function handle_nq_jachar()
+ if Np.pre then
+ local g = non_ihb_flag and get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
+ handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
+ else
+ local g =non_ihb_flag and get_OB_skip() -- O_B
+ if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
+ elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
+ else handle_penalty_always(Nq.post, 0, g)
+ end
+ real_insert(g)
+ end
+end
+
+-- (anything) .. (和文文字で始まる hlist)
+local function handle_np_ja_hlist()
+ local qid = Nq.id
+ if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
+ local g = non_ihb_flag and get_OB_skip() or get_kanjiskip() -- O_B->K
+ handle_penalty_normal(Nq.post, 0, g); real_insert(g)
+ elseif Nq.met then -- Nq.id==id_hlist
+ local g = get_kanjiskip() -- K
+ handle_penalty_suppress(0, 0, g); real_insert(g)
+ elseif Nq.pre then
+ local g = get_xkanjiskip(Np) -- X
+ handle_penalty_suppress(0, 0, g); real_insert(g)
+ end
+end
+
+-- (和文文字で終わる hlist) .. (anything)
+local function handle_nq_ja_hlist()
+ if Np.pre then
+ local g = get_xkanjiskip(Nq) -- X
+ handle_penalty_suppress(0, 0, g); real_insert(g)
+ end
+end
+
+
+-- Nq が前側のクラスタとなることによる修正
+do
+ local adjust_nq_aux = {
+ [id_glyph] = function() after_alchar(Nq) end, -- after_alchar(Nq)
+ [id_hlist] = function() after_hlist(Nq) end,
+ [id_pbox] = function() after_hlist(Nq) end,
+ [id_disc] = function() after_hlist(Nq) end,
+ [id_pbox_w] = function()
+ luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
+ false, Nq, Np)
+ end,
+ }
+
+ function adjust_nq()
+ local x = adjust_nq_aux[Nq.id]
+ if x then x() end
+ end
+end
+
+
+-------------------- 開始・終了時の処理
+do
+
+-- リスト末尾の処理
+local JWP = luatexja.stack_table_index.JWP
+local function handle_list_tail(mode)
+ adjust_nq(); Np = Nq
+ if mode then
+ -- the current list is to be line-breaked.
+ -- Insert \jcharwidowpenalty
+ Bp = widow_Bp; Np = widow_Np
+ if Np.first then
+ handle_penalty_normal(0, table_current_stack[JWP] or 0)
+ end
+ else
+ -- the current list is the contents of a hbox
+ local npi, pm = Np.id, Np.met
+ if npi == id_jglyph or (npi==id_pbox and pm) then
+ local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
+ if g then
+ set_attr(g, attr_icflag, BOXBDD)
+ head = insert_after(head, Np.last, g)
+ end
+ end
+ end
+end
+
+-- リスト先頭の処理
+local function handle_list_head(par_indented)
+ local npi, pm = Np.id, Np.met
+ if npi == id_jglyph or (npi==id_pbox and pm) then
+ if non_ihb_flag then
+ local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
+ if g then
+ set_attr(g, attr_icflag, BOXBDD)
+ if getid(g)==id_glue and #Bp==0 then
+ local h = node_new(id_penalty)
+ setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
+ end
+ head = insert_before(head, Np.first, g)
+ end
+ end
+ end
+end
+
+-- initialize
+-- return value: (the initial cursor lp), (last node)
+local init_var
+do
+ local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
+ local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
+ local KSK = luatexja.stack_table_index.KSK
+ local XSK = luatexja.stack_table_index.XSK
+ local dir_yoko = luatexja.dir_table.dir_yoko
+ local dir_tate = luatexja.dir_table.dir_tate
+ local attr_yablshift = luatexbase.attributes['ltj@yablshift']
+ local attr_tablshift = luatexbase.attributes['ltj@tablshift']
+ local table_pool = {
+ {}, {}, {first=nil},
+ { auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
+ first=nil, id=nil, last=nil, met=nil, nuc=nil,
+ post=nil, pre=nil, xspc=nil, },
+ { auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
+ first=nil, id=nil, last=nil, met=nil, nuc=nil,
+ post=nil, pre=nil, xspc=nil, },
+ }
+ init_var = function (mode,dir)
+ -- 1073741823: max_dimen
+ Bp, widow_Bp, widow_Np, Np, Nq
+ = table_pool[1], table_pool[2], table_pool[3], table_pool[4], table_pool[5]
+ for i=1,5 do for j,_ in pairs(table_pool[i]) do table_pool[i][j]=nil end end
+ table_current_stack = ltjs.table_current_stack
+
+ list_dir, tex_dir = (ltjs.list_dir or dir_yoko), (dir or 'TLT')
+ local is_dir_tate = list_dir==dir_tate
+ capsule_glyph = is_dir_tate and ltjw.capsule_glyph_tate or ltjw.capsule_glyph_yoko
+ attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
+ local TEMP = node_new(id_glue)
+ -- TEMP is a dummy node, which will be freed at the end of the callback.
+ -- ithout this node, set_attr(kanji_skip, ...) somehow creates an "orphaned" attribute list.
+
+ do
+ kanji_skip = node_new(id_glue); set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
+ local s = skip_table_to_spec(KSK)
+ setfield(kanji_skip, 'spec', s)
+ get_kanjiskip = (getfield(s, 'width') == 1073741823)
+ and get_kanjiskip_jfm or get_kanjiskip_normal
+ end
+
+ do
+ xkanji_skip = node_new(id_glue); set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
+ local s = skip_table_to_spec(XSK)
+ setfield(xkanji_skip, 'spec', s)
+ get_xkanjiskip = (getfield(s, 'width') == 1073741823)
+ and get_xkanjiskip_jfm or get_xkanjiskip_normal
+ end
+
+ if mode then
+ -- the current list is to be line-breaked:
+ -- hbox from \parindent is skipped.
+ local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
+ while lp and ((lpi==id_whatsit and lps~=sid_user)
+ or ((lpi==id_hlist) and (lps==3))) do
+ if (lpi==id_hlist) and (lps==3) then
+ Np.char, par_indented = 'parbdd', 'parbdd'
+ Np.width = getfield(lp, 'width')
+ end
+ lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
+ return lp, node_tail(head), par_indented, TEMP
+ else
+ return head, nil, 'boxbdd', TEMP
+ end
+ end
+end
+
+local ensure_tex_attr = ltjb.ensure_tex_attr
+local function cleanup(mode, TEMP)
+ -- adjust attr_icflag for avoiding error
+ if tex.getattribute(attr_icflag)~=0 then ensure_tex_attr(attr_icflag, 0) end
+ node_free(kanji_skip); node_free(xkanji_skip); node_free(TEMP)
+
+ if mode then
+ local h = node_next(head)
+ if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
+ h = node_next(h)
+ if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
+ return false
+ end
+ end
+ end
+ return head
+end
+-------------------- 外部から呼ばれる関数
+
+-- main interface
+function main(ahead, mode, dir)
+ if not ahead then return ahead end
+ head = ahead;
+ local lp, last, par_indented, TEMP = init_var(mode,dir)
+ lp = calc_np(last, lp)
+ if Np then
+ handle_list_head(par_indented)
+ lp = calc_np(last,lp); while Np do
+ adjust_nq();
+ local pid, pm = Np.id, Np.met
+ -- 挿入部
+ if pid == id_jglyph then
+ handle_np_jachar(mode)
+ elseif pm then
+ if pid==id_hlist then handle_np_ja_hlist()
+ else handle_np_jachar() end
+ elseif Nq.met then
+ if Nq.id==id_hlist then handle_nq_ja_hlist()
+ else handle_nq_jachar() end
+ end
+ lp = calc_np(last,lp)
+ end
+ handle_list_tail(mode)
+ end
+ return cleanup(mode, TEMP)
+end
+end
+
+do
+ local IHB = luatexja.userid_table.IHB
+ local JGH = luatexja.userid_table.JGH
+ local BPAR = luatexja.userid_table.BPAR
+ local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
+ local node_write = Dnode.write
+ local scan_int = luatexja.token.scan_int
+
+ -- \inhibitglue
+ function create_inhibitglue_node()
+ local tn = node_new(id_whatsit, sid_user)
+ setfield(tn, 'user_id', IHB)
+ setfield(tn, 'type', 100)
+ setfield(tn, 'value', 1)
+ node_write(tn)
+ end
+
+ -- \ltjghost<char_code>
+ function create_inhibitglue_node()
+ local tn = node_new(id_whatsit, sid_user)
+ setfield(tn, 'user_id', JGH)
+ setfield(tn, 'type', 100)
+ setfield(tn, 'value', scan_int())
+ node_write(tn)
+ end
+
+ -- Node for indicating beginning of a paragraph
+ -- (for ltjsclasses)
+ function create_beginpar_node()
+ local tn = node_new(id_whatsit, sid_user)
+ setfield(tn, 'user_id', BPAR)
+ setfield(tn, 'type', 100)
+ setfield(tn, 'value', 1)
+ node_write(tn)
+ end
+
+ local function whatsit_callback(Np, lp, Nq)
+ if Np and Np.nuc then return Np
+ elseif Np and getfield(lp, 'user_id') == BPAR then
+ Np.first = lp; Np.nuc = lp; Np.last = lp
+ return Np
+ elseif Np and getfield(lp, 'user_id') == JGH then
+ Nq.first = lp; Np.nuc = lp; Np.last = lp
+ Np.met, Np.pre, Np.post = Nq.met, 0, 0
+ return Np
+ end
+ end
+
+ local function whatsit_after_callback(s, Nq, Np)
+ if not s then
+ if getfield(Nq.nuc, 'user_id') == BPAR then
+ local x, y = node_prev(Nq.nuc), Nq.nuc
+ Nq.first, Nq.nuc, Nq.last = x, x, x
+ if Np then
+ if Np.met then
+ Nq.class = fast_find_char_class('parbdd', Np.met)
+ end
+ Nq.met = Np.met; Nq.pre = 0; Nq.post = 0; Nq.xspc = 0
+ Nq.auto_xspc = false
+ end
+ head = node_remove(head, y)
+ node_free(y)
+ elseif getfield(Nq.nuc, 'user_id') == JGH then
+ local x, y = node_prev(Nq.nuc), Nq.nuc
+ Nq.first, Nq.nuc, Nq.last = x, x, x
+ if Np then
+ if Np.met then
+ Nq.class = fast_find_char_class('parbdd', Np.met)
+ end
+ Nq.met = Np.met; Nq.pre = 0; Nq.post = 0; Nq.xspc = 0
+ Nq.auto_xspc = false
+ end
+ head = node_remove(head, y)
+ node_free(y)
+ return Np
+ end
+ end
+ return s
+ end
+
+ luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
+ "luatexja.beginpar.np_info", 1)
+ luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
+ "luatexja.beginpar.np_info_after", 1)
+
+end
\ No newline at end of file
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