2 -- luatexja/jfmglue.lua
4 luatexbase.provides_module({
5 name = 'luatexja.jfmglue',
8 description = 'Insertion process of JFM glues and kanjiskip',
10 module('luatexja.jfmglue', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 luatexja.load_module('stack'); local ltjs = luatexja.stack
14 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
15 luatexja.load_module('pretreat'); local ltjp = luatexja.pretreat
17 local has_attr = node.has_attribute
18 local set_attr = node.set_attribute
19 local insert_before = node.insert_before
20 local node_next = node.next
21 local round = tex.round
22 local ltjs_fast_get_penalty_table = ltjs.fast_get_penalty_table
23 local ltjf_font_metric_table = ltjf.font_metric_table
24 local ltjf_find_char_class = ltjf.find_char_class
25 local node_new = node.new
26 local node_copy = node.copy
28 local ligature_head = 1
29 local ligature_tail = 2
31 local id_glyph = node.id('glyph')
32 local id_hlist = node.id('hlist')
33 local id_vlist = node.id('vlist')
34 local id_rule = node.id('rule')
35 local id_ins = node.id('ins')
36 local id_mark = node.id('mark')
37 local id_adjust = node.id('adjust')
38 local id_disc = node.id('disc')
39 local id_whatsit = node.id('whatsit')
40 local id_math = node.id('math')
41 local id_glue = node.id('glue')
42 local id_kern = node.id('kern')
43 local id_penalty = node.id('penalty')
45 local id_glue_spec = node.id('glue_spec')
46 local id_jglyph = node.id('glyph') + 256 -- Japanese character
47 local id_box_like = node.id('hlist') + 256 -- vbox, shifted hbox
48 local id_pbox = node.id('hlist') + 512 -- already processed nodes (by \unhbox)
49 local id_pbox_w = node.id('hlist') + 513 -- cluster which consists of a whatsit
50 local sid_user = node.subtype('user_defined')
52 local sid_start_link = node.subtype('pdf_start_link')
53 local sid_start_thread = node.subtype('pdf_start_thread')
54 local sid_end_link = node.subtype('pdf_end_link')
55 local sid_end_thread = node.subtype('pdf_end_thread')
59 -- 実装予定: non-packed jchar 3
62 -- FROM_JFM: 4, 5, 6, 7, 8 →優先度高
65 local XKANJI_SKIP = 10
67 local IC_PROCESSED = 12
69 local PROCESSED_BEGIN_FLAG = 32
74 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
75 local attr_icflag = luatexbase.attributes['ltj@icflag']
76 local max_dimen = 1073741823
78 local function get_attr_icflag(p)
79 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
82 -------------------- Helper functions
84 local function copy_attr(new, old)
88 -- This function is called only for acquiring `special' characters.
89 local function fast_find_char_class(c,m)
90 return m.size_cache.chars[c] or 0
94 local function slow_find_char_class(c, m, oc)
96 local cls = ltjf_find_char_class(oc, m)
97 if xc ~= oc and cls==0 then cls, xc = ltjf_find_char_class(-xc, m) end
101 local spec_zero_glue = node_new(id_glue_spec)
102 spec_zero_glue.width = 0; spec_zero_glue.stretch_order = 0; spec_zero_glue.stretch = 0
103 spec_zero_glue.shrink_order = 0; spec_zero_glue.shrink = 0
105 local function skip_table_to_spec(n)
106 local g, st = node_new(id_glue_spec), ltjs.fast_get_skip_table(n)
107 g.width = st.width; g.stretch = st.stretch; g.shrink = st.shrink
108 g.stretch_order = st.stretch_order; g.shrink_order = st.shrink_order
114 local function add_penalty(p,e)
117 if e<=-10000 then pp = 0 end
118 elseif pp<=-10000 then
119 if e>=10000 then pp = 0 end
122 if pp>=10000 then p.penalty = 10000
123 elseif pp<=-10000 then p.penalty = -10000
124 else p.penalty = pp end
130 diffmet_rule = math.two_paverage
131 function math.two_add(a,b) return a+b end
132 function math.two_average(a,b) return (a+b)*0.5 end
133 function math.two_paverage(a,b) return (a+b)*0.5 end
134 function math.two_pleft(a,b) return a end
135 function math.two_pright(a,b) return b end
137 local head -- the head of current list
140 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
142 local ihb_flag -- JFM グルー挿入抑止用 flag
143 -- on: \inhibitglue 指定時,hlist の周囲
145 -------------------- hlist 内の文字の検索
147 local first_char, last_char, find_first_char
149 local function check_box(box_ptr, box_end)
150 local p = box_ptr; local found_visible_node = false
152 find_first_char = false; first_char = nil; last_char = nil
155 while p and p~=box_end do
157 if pid==id_kern and p.subtype==2 then
158 p = node_next(node_next(node_next(p))); pid = p.id -- p must be glyph_node
160 if pid==id_glyph then
162 if find_first_char then
163 first_char = p; find_first_char = false
165 last_char = p; found_visible_node = true; p=node_next(p)
166 if (not p) or p==box_end then return found_visible_node end
168 pid = p.id -- p must be non-nil
170 if pid==id_kern and get_attr_icflag(p)==IC_PROCESSED then
172 elseif pid==id_hlist then
173 if PACKED == get_attr_icflag(p) then
174 if find_first_char then
175 first_char = p.head; find_first_char = false
177 last_char = p.head; found_visible_node = true
180 if check_box(p.head, nil) then found_visible_node = true end
181 else if find_first_char then
182 find_first_char = false
188 elseif not (pid==id_ins or pid==id_mark
189 or pid==id_adjust or pid==id_whatsit
190 or pid==id_penalty) then
191 found_visible_node = true
192 if find_first_char then
193 find_first_char = false
200 return found_visible_node
203 function check_box_high(Nx, box_ptr, box_end)
204 first_char = nil; last_char = nil; find_first_char = true
205 if check_box(box_ptr, box_end) then
207 if first_char.font == (has_attr(first_char, attr_curjfnt) or -1) then
208 set_np_xspc_jachar(Nx, first_char)
210 set_np_xspc_alchar(Nx, first_char.char,first_char, ligature_head)
217 -------------------- Np の計算と情報取得
219 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
220 function (Np, lp, Nq)
221 if Np.nuc then return Np
223 return Np -- your code
226 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
227 function (stat, Nq, Np) return false end)
232 local function set_attr_icflag_processed(p)
233 if get_attr_icflag(p)<= ITALIC then
234 set_attr(p, attr_icflag, PROCESSED)
238 local function check_next_ickern(lp)
239 if lp.id == id_kern and ITALIC == get_attr_icflag(lp) then
240 set_attr(lp, attr_icflag, IC_PROCESSED)
241 Np.last = lp; return node_next(lp)
243 Np.last = Np.nuc; return lp
247 local function calc_np_pbox(lp, last)
248 Np.first = Np.first or lp; Np.id = id_pbox
249 local lpa = KINSOKU -- dummy=
250 set_attr(lp, attr_icflag, get_attr_icflag(lp));
251 while lp~=last and lpa>=PACKED and lpa<BOXBDD do
253 lp = node_next(lp); lpa = has_attr(lp, attr_icflag) or 0
254 -- get_attr_icflag() ではいけない!
256 return check_next_ickern(lp)
260 local calc_np_auxtable = {
261 [id_glyph] = function (lp)
262 Np.first, Np.nuc = (Np.first or lp), lp;
263 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
264 --set_attr_icflag_processed(lp) treated in ltj-setwidth.lua
265 return true, check_next_ickern(node_next(lp));
267 [id_hlist] = function(lp)
268 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
269 set_attr_icflag_processed(lp)
270 Np.id = (lp.shift~=0) and id_box_like or id_hlist
271 return true, node_next(lp)
273 box_like = function(lp)
274 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
275 Np.id = id_box_like; set_attr_icflag_processed(lp);
276 return true, node_next(lp);
279 set_attr_icflag_processed(lp); return false, node_next(lp)
281 [id_whatsit] = function(lp)
282 if lp.subtype==sid_user then
283 if lp.user_id==30111 then
284 local lq = node_next(lp);
285 head = node.remove(head, lp); node.free(lp); ihb_flag = true
288 set_attr_icflag_processed(lp)
289 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
292 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
293 return true, node_next(lp)
295 return false, node_next(lp)
299 -- we do special treatment for these whatsit nodes.
300 if lp.subtype == sid_start_link or lp.subtype == sid_start_thread then
302 elseif lp.subtype == sid_end_link or lp.subtype == sid_end_thread then
303 Np.first, Nq.last = nil, lp;
305 set_attr_icflag_processed(lp); return false, node_next(lp)
308 [id_math] = function(lp)
309 Np.first, Np.nuc = (Np.first or lp), lp;
310 set_attr_icflag_processed(lp); lp = node_next(lp)
311 while lp.id~=id_math do
312 set_attr_icflag_processed(lp); lp = node_next(lp)
314 set_attr_icflag_processed(lp);
315 Np.last, Np.id = lp, id_math;
316 return true, node_next(lp);
318 discglue = function(lp)
319 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
320 Np.id = lp.id; set_attr_icflag_processed(lp); return true, node_next(lp)
322 [id_kern] = function(lp)
323 Np.first = Np.first or lp
324 if lp.subtype==2 then
325 set_attr_icflag_processed(lp); lp = node_next(lp)
326 set_attr_icflag_processed(lp); lp = node_next(lp)
327 set_attr_icflag_processed(lp); lp = node_next(lp)
328 set_attr_icflag_processed(lp); Np.nuc = lp
329 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
330 return true, check_next_ickern(node_next(lp));
332 Np.id = id_kern; set_attr_icflag_processed(lp);
333 Np.last = lp; return true, node_next(lp)
336 [id_penalty] = function(lp)
337 Bp[#Bp+1] = lp; set_attr_icflag_processed(lp);
338 return false, node_next(lp)
341 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
342 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
343 calc_np_auxtable[13] = calc_np_auxtable.box_like
344 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
345 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
346 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
347 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
348 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
351 function calc_np(lp, last)
353 -- We assume lp = node_next(Np.last)
354 Np, Nq, ihb_flag = Nq, Np, false
355 -- We clear `predefined' entries of Np before pairs() loop,
356 -- because using only pairs() loop is slower.
357 Np.post, Np.pre, Np.xspc = nil, nil, nil
358 Np.first, Np.id, Np.last, Np.met = nil, nil, nil
359 Np.auto_kspc, Np.auto_xspc, Np.char, Np.class, Np.nuc = nil, nil, nil, nil, nil
360 for k in pairs(Np) do Np[k] = nil end
362 for k = 1,#Bp do Bp[k] = nil end
364 local lpa = has_attr(lp, attr_icflag) or 0
367 if lpa == BOXBDD then
368 local lq = node_next(lp)
369 head = node.remove(head, lp); node.free(lp); lp = lq
370 else return calc_np_pbox(lp, last)
373 k, lp = calc_np_auxtable[lp.id](lp)
374 if k then return lp end
381 local calc_np = calc_np
383 -- extract informations from Np
384 -- We think that "Np is a Japanese character" if Np.met~=nil,
385 -- "Np is an alphabetic character" if Np.pre~=nil,
386 -- "Np is not a character" otherwise.
390 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
391 local attr_orig_char = luatexbase.attributes['ltj@origchar']
392 local attr_autospc = luatexbase.attributes['ltj@autospc']
393 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
394 function set_np_xspc_jachar(Nx, x)
395 local m = ltjf_font_metric_table[x.font]
396 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, x.char)
397 Nx.class = cls; set_attr(x, attr_jchar_class, cls)
398 Nx.met, Nx.char = m, c
399 Nx.pre = ltjs_fast_get_penalty_table('pre', c) or 0
400 Nx.post = ltjs_fast_get_penalty_table('post', c) or 0
401 Nx.xspc = ltjs_fast_get_penalty_table('xsp', c) or 3
402 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
404 local set_np_xspc_jachar = set_np_xspc_jachar
407 local floor = math.floor
408 function set_np_xspc_alchar(Nx, c,x, lig)
410 local xc, xs = x.components and x.subtype
411 if lig == ligature_head then
412 while xc and xs and x%4>=2 do
416 while xc and xs and xs%4>=2 do
417 x = node.tail(xc); c = x.char
420 Nx.pre = ltjs_fast_get_penalty_table('pre', c) or 0
421 Nx.post = ltjs_fast_get_penalty_table('post', c) or 0
424 Nx.pre, Nx.post, Nx.char = 0, 0, -1
427 Nx.xspc = ltjs_fast_get_penalty_table('xsp', c) or 3
428 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
430 local set_np_xspc_alchar = set_np_xspc_alchar
433 function extract_np()
434 local x, i = Np.nuc, Np.id;
435 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
436 elseif i == id_glyph then return set_np_xspc_alchar(Np, x.char, x, ligature_head)
437 elseif i == id_hlist then Np.last_char = check_box_high(Np, x.head, nil)
438 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
439 elseif i == id_disc then Np.last_char = check_box_high(Np, x.replace, nil)
440 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
444 -- change the information for the next loop
445 -- (will be done if Nx is an alphabetic character or a hlist)
446 function after_hlist(Nx)
447 local s = Nx.last_char
449 if s.font == (has_attr(s, attr_curjfnt) or -1) then
450 set_np_xspc_jachar(Nx, s)
452 set_np_xspc_alchar(Nx, s.char, s, ligature_tail)
455 Nx.pre, Nx.met = nil, nil
459 function after_alchar(Nx)
461 return set_np_xspc_alchar(Nx, x.char,x, ligature_tail)
465 local after_hlist, after_alchar, extract_np = after_hlist, after_alchar, extract_np
467 -------------------- 最下層の処理
469 -- change penalties (or create a new penalty, if needed)
470 local function handle_penalty_normal(post, pre, g)
471 local a = (pre or 0) + (post or 0)
473 if (a~=0 and not(g and g.id==id_kern)) then
474 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
475 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
477 head = insert_before(head, Np.first, p)
479 set_attr(p, attr_icflag, KINSOKU)
481 else for _, v in pairs(Bp) do add_penalty(v,a) end
485 local function handle_penalty_always(post, pre, g)
486 local a = (pre or 0) + (post or 0)
488 if not (g and g.id==id_glue) then
489 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
490 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
492 head = insert_before(head, Np.first, p)
494 set_attr(p, attr_icflag, KINSOKU)
496 else for _, v in pairs(Bp) do add_penalty(v,a) end
500 local function handle_penalty_suppress(post, pre, g)
501 local a = (pre or 0) + (post or 0)
503 if g and g.id==id_glue then
504 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
505 p.penalty = 10000; head = insert_before(head, Np.first, p)
507 set_attr(p, attr_icflag, KINSOKU)
509 else for _, v in pairs(Bp) do add_penalty(v,a) end
513 -- 和文文字間の JFM glue を node 化
514 local function new_jfm_glue(Nn, bc, ac)
515 -- bc, ac: char classes
516 local z = Nn.met.size_cache.char_type[bc]
517 local g, d = z.glue[ac], 0
519 g,d = node_copy(g[1]), g[2];
520 g.spec = node.copy(g.spec); -- node_copy は spec を copy しない(参照を増やすのみ)
524 g = node_new(id_kern); --copy_attr(g, Nn.nuc)
525 g.subtype = 1; g.kern, d = k[1], k[2]
526 set_attr(g, attr_icflag, FROM_JFM);
532 -- Nq.last (kern w) .... (glue/kern g) Np.first
533 local function real_insert(w, g)
535 head = insert_before(head, Np.first, g)
541 -------------------- 和文文字間空白量の決定
546 local function get_kanjiskip_normal()
547 if Np.auto_kspc or Nq.auto_kspc then
548 return node_copy(kanji_skip)
550 local g = node_new(id_glue); --copy_attr(g, Nq.nuc)
551 g.spec = node_copy(spec_zero_glue)
552 set_attr(g, attr_icflag, KANJI_SKIP)
556 local function get_kanjiskip_jfm()
557 local g = node_new(id_glue); --copy_attr(g, Nq.nuc)
558 if Np.auto_kspc or Nq.auto_kspc then
559 local gx = node_new(id_glue_spec);
560 gx.stretch_order, gx.shrink_order = 0, 0
561 local pm, qm = Np.met, Nq.met
562 local bk = qm.size_cache.kanjiskip or {0, 0, 0}
563 if (pm.size_cache==qm.size_cache) and (qm.var==pm.var) then
564 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
566 local ak = pm.size_cache.kanjiskip or {0, 0, 0}
567 gx.width = round(diffmet_rule(bk[1], ak[1]))
568 gx.stretch = round(diffmet_rule(bk[2], ak[2]))
569 gx.shrink = -round(diffmet_rule(-bk[3], -ak[3]))
573 g.spec = node_copy(spec_zero_glue)
575 set_attr(g, attr_icflag, KANJI_SKIP)
579 local function calc_ja_ja_aux(gb,ga, db, da)
580 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
581 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
582 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
583 and diffmet_rule ~= math.two_paverage then
584 rbb, rab, rba, raa = 1,0,0,1
587 if ga then gb = node_new(id_kern); gb.kern = 0 else return nil end
589 ga = node_new(id_kern); ga.kern = 0
592 local k = node.type(gb.id) .. node.type(ga.id)
593 if k == 'glueglue' then
595 gb.spec.width = round(diffmet_rule(
596 rbb*gb.spec.width + rba*ga.spec.width,
597 rab*gb.spec.width + raa*ga.spec.width ))
598 gb.spec.stretch = round(diffmet_rule(
599 rbb*gb.spec.stretch + rba*ga.spec.stretch,
600 rab*gb.spec.stretch + raa*ga.spec.stretch ))
601 gb.spec.shrink = -round(diffmet_rule(
602 -rbb*gb.spec.shrink - rba*ga.spec.shrink,
603 -rab*gb.spec.shrink - raa*ga.spec.shrink ))
606 elseif k == 'kernkern' then
608 gb.kern = round(diffmet_rule(
609 rbb*gb.kern + rba*ga.kern,
610 rab*gb.kern + raa*ga.kern ))
613 elseif k == 'kernglue' then
614 -- gb: kern, ga: glue
615 ga.spec.width = round(diffmet_rule(
616 rbb*gb.kern + rba*ga.spec.width,
617 rab*gb.kern + raa*ga.spec.width ))
618 ga.spec.stretch = round(diffmet_rule(
619 rba*ga.spec.stretch, raa*ga.spec.stretch ))
620 ga.spec.shrink = -round(diffmet_rule(
621 -rba*ga.spec.shrink,-raa*ga.spec.shrink ))
625 -- gb: glue, ga: kern
626 gb.spec.width = round(diffmet_rule(
627 rba*ga.kern + rbb*gb.spec.width,
628 raa*ga.kern + rab*gb.spec.width ))
629 gb.spec.stretch = round(diffmet_rule(
630 rbb*gb.spec.stretch, rab*gb.spec.stretch ))
631 gb.spec.shrink = -round(diffmet_rule(
632 -rbb*gb.spec.shrink,-rab*gb.spec.shrink ))
638 local function calc_ja_ja_glue()
639 if ihb_flag then return nil
641 local qm, pm = Nq.met, Np.met
642 if (qm.size_cache==pm.size_cache) and (qm.var==pm.var) then
643 return new_jfm_glue(Nq, Nq.class, Np.class)
645 local gb, db = new_jfm_glue(Nq, Nq.class, ltjf_find_char_class(Np.char, qm))
646 local ga, da = new_jfm_glue(Np, ltjf_find_char_class(Nq.char, pm), Np.class)
647 return calc_ja_ja_aux(gb, ga, db, da);
652 -------------------- 和欧文間空白量の決定
656 local function get_xkanjiskip_normal(Nn)
657 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
658 return node_copy(xkanji_skip)
660 local g = node_new(id_glue); --copy_attr(g, Nn.nuc)
661 g.spec = node_copy(spec_zero_glue)
662 set_attr(g, attr_icflag, XKANJI_SKIP)
666 local function get_xkanjiskip_jfm(Nn)
667 local g = node_new(id_glue); --copy_attr(g, Nn.nuc)
668 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
669 local gx = node_new(id_glue_spec);
670 gx.stretch_order, gx.shrink_order = 0, 0
671 local bk = Nn.met.size_cache.xkanjiskip or {0, 0, 0}
672 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
675 g.spec = node_copy(spec_zero_glue)
677 set_attr(g, attr_icflag, XKANJI_SKIP)
683 -------------------- 隣接した「塊」間の処理
685 local function get_OA_skip()
687 return new_jfm_glue(Np,
688 fast_find_char_class(((Nq.id == id_math and -1) or 'jcharbdd'), Np.met), Np.class)
692 local function get_OB_skip()
694 return new_jfm_glue(Nq, Nq.class,
695 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), Nq.met))
700 -- (anything) .. jachar
701 local function handle_np_jachar(mode)
703 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
704 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
705 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(0, g)
706 elseif Nq.met then -- qid==id_hlist
707 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
708 handle_penalty_normal(0, Np.pre, g); real_insert(0, g)
710 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
711 if qid==id_hlist then Nq.post = 0 end
712 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(0, g)
714 local g = get_OA_skip() -- O_A
715 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
716 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
717 else handle_penalty_always(0, Np.pre, g)
721 if mode and (ltjs_fast_get_penalty_table('kcat', Np.char) or 0)%2~=1 then
722 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
727 -- jachar .. (anything)
728 local function handle_nq_jachar()
730 if Np.id==id_hlist then Np.pre = 0 end
731 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
732 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(0, g)
734 local g = get_OB_skip() -- O_B
735 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
736 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
737 else handle_penalty_always(Nq.post, 0, g)
743 -- (anything) .. (和文文字で始まる hlist)
744 local function handle_np_ja_hlist()
746 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
747 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
748 handle_penalty_normal(Nq.post, 0, g); real_insert(0, g)
749 elseif Nq.met then -- Nq.id==id_hlist
750 local g = get_kanjiskip() -- K
751 handle_penalty_suppress(0, 0, g); real_insert(0, g)
753 local g = get_xkanjiskip(Np) -- X
754 handle_penalty_suppress(0, 0, g); real_insert(0, g)
758 -- (和文文字で終わる hlist) .. (anything)
759 local function handle_nq_ja_hlist()
761 local g = get_xkanjiskip(Nq) -- X
762 handle_penalty_suppress(0, 0, g); real_insert(0, g)
766 -- Nq が前側のクラスタとなることによる修正
767 local function adjust_nq()
768 if Nq.id==id_glyph then after_alchar(Nq)
769 elseif Nq.id==id_hlist or Nq.id==id_pbox or Nq.id==id_disc then after_hlist(Nq)
770 elseif Nq.id == id_pbox_w then
771 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
776 -------------------- 開始・終了時の処理
779 local function handle_list_tail(mode)
782 -- the current list is to be line-breaked.
783 -- Insert \jcharwidowpenalty
784 Bp = widow_Bp; Np = widow_Np
786 handle_penalty_normal(0,
787 ltjs_fast_get_penalty_table('jwp', 0) or 0)
790 -- the current list is the contents of a hbox
791 if Np.id == id_jglyph or (Np.id==id_pbox and Np.met) then
792 local g = new_jfm_glue(Np, Np.class, fast_find_char_class('boxbdd',Np.met))
794 set_attr(g, attr_icflag, BOXBDD)
795 head = node.insert_after(head, Np.last, g)
802 local function handle_list_head(par_indented)
803 if Np.id == id_jglyph or (Np.id==id_pbox and Np.met) then
805 local g = new_jfm_glue(Np, fast_find_char_class(par_indented, Np.met), Np.class)
807 set_attr(g, attr_icflag, BOXBDD)
808 if g.id==id_glue and #Bp==0 then
809 local h = node_new(id_penalty); --copy_attr(h, Np.nuc)
810 h.penalty = 10000; set_attr(h, attr_icflag, BOXBDD)
812 head = insert_before(head, Np.first, g)
819 -- return value: (the initial cursor lp), (last node)
820 local function init_var(mode)
821 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
823 kanji_skip = node_new(id_glue)
824 kanji_skip.spec = skip_table_to_spec('kanjiskip')
825 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
826 get_kanjiskip = (kanji_skip.spec.width == max_dimen)
827 and get_kanjiskip_jfm or get_kanjiskip_normal
829 xkanji_skip = node_new(id_glue)
830 xkanji_skip.spec = skip_table_to_spec('xkanjiskip')
831 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
832 get_xkanjiskip = (xkanji_skip.spec.width == max_dimen)
833 and get_xkanjiskip_jfm or get_xkanjiskip_normal
836 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
837 first=nil, id=nil, last=nil, met=nil, nuc=nil,
838 post=nil, pre=nil, xspc=nil,
841 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
842 first=nil, id=nil, last=nil, met=nil, nuc=nil,
843 post=nil, pre=nil, xspc=nil,
846 -- the current list is to be line-breaked:
847 -- hbox from \parindent is skipped.
848 local lp, par_indented, lpi, lps = head, 'boxbdd', head.id, head.subtype
849 while lp and ((lpi==id_whatsit and lps~=sid_user)
850 or ((lpi==id_hlist) and (lps==3))) do
851 if (lpi==id_hlist) and (lps==3) then par_indented = 'parbdd' end
852 lp=node_next(lp); lpi, lps = lp.id, lp.subtype end
853 return lp, node.tail(head), par_indented
855 -- the current list is the contents of a hbox:
857 local g = node_new(id_kern)
858 node.insert_after(head, node.tail(head), g); last = g
859 return head, g, 'boxbdd'
863 local function cleanup(mode, last)
864 -- adjust attr_icflag for avoiding error
865 tex.setattribute('global', attr_icflag, 0)
866 node.free(kanji_skip); node.free(xkanji_skip)
868 local h = node_next(head)
869 if h.id == id_penalty and h.penalty == 10000 then
871 if h.id == id_glue and h.subtype == 15 and not h.next then
877 head = node.remove(head, last); node.free(last);-- remove the sentinel
878 set_attr(head, attr_icflag,
879 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
883 -------------------- 外部から呼ばれる関数
886 function main(ahead, mode)
887 if not ahead then return ahead end
889 local lp, last, par_indented = init_var(mode);
890 lp = calc_np(lp, last)
892 extract_np(); handle_list_head(par_indented)
894 return cleanup(mode, last)
896 lp = calc_np(lp, last)
898 extract_np(); adjust_nq()
899 local pid, pm = Np.id, Np.met
901 if pid == id_jglyph then
902 handle_np_jachar(mode)
904 if pid==id_hlist then handle_np_ja_hlist()
905 else handle_np_jachar() end
907 if Nq.id==id_hlist then handle_nq_ja_hlist()
908 else handle_nq_jachar() end
910 lp = calc_np(lp, last)
912 handle_list_tail(mode)
913 return cleanup(mode, last)
918 function create_inhibitglue_node()
919 local tn = node_new(id_whatsit, sid_user)
920 tn.user_id=30111; tn.type=100; tn.value=1
924 -- Node for indicating beginning of a paragraph
926 function create_beginpar_node()
927 local tn = node_new(id_whatsit, sid_user)
928 tn.user_id=30114; tn.type=100; tn.value=1
934 local function whatsit_callback(Np, lp, Nq)
935 if Np and Np.nuc then return Np
936 elseif Np and lp.user_id == 30114 then
937 Np.first = lp; Np.nuc = lp; Np.last = lp
940 Np.pre = 0; Np.post = 0
948 local function whatsit_after_callback(s, Nq, Np)
949 if not s and Nq.nuc.user_id == 30114 then
950 local x, y = node.prev(Nq.nuc), Nq.nuc
951 Nq.first, Nq.nuc, Nq.last = x, x, x
952 head = node.remove(head, y)
957 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
958 "luatexja.beginpar.np_info", 1)
959 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
960 "luatexja.beginpar.np_info_after", 1)