2 -- luatexja/ltj-jfmglue.lua
4 luatexbase.provides_module({
5 name = 'luatexja.jfmglue',
7 description = 'Insertion process of JFM glues and kanjiskip',
9 module('luatexja.jfmglue', package.seeall)
10 local err, warn, info, log = luatexbase .errwarinf(_NAME)
12 luatexja.load_module('stack'); local ltjs = luatexja.stack
13 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
14 luatexja.load_module('pretreat'); local ltjp = luatexja.pretreat
16 local has_attr = node.has_attribute
17 local set_attr = node.set_attribute
18 local insert_before = node.insert_before
19 local node_next = node.next
20 local round = tex.round
21 local ltjf_font_metric_table = ltjf.font_metric_table
22 local ltjf_find_char_class = ltjf.find_char_class
23 local node_new = node.new
24 local node_copy = node.copy
26 local id_glyph = node.id('glyph')
27 local id_hlist = node.id('hlist')
28 local id_vlist = node.id('vlist')
29 local id_rule = node.id('rule')
30 local id_ins = node.id('ins')
31 local id_mark = node.id('mark')
32 local id_adjust = node.id('adjust')
33 local id_disc = node.id('disc')
34 local id_whatsit = node.id('whatsit')
35 local id_math = node.id('math')
36 local id_glue = node.id('glue')
37 local id_kern = node.id('kern')
38 local id_penalty = node.id('penalty')
40 local id_glue_spec = node.id('glue_spec')
41 local id_jglyph = 512 -- Japanese character
42 local id_box_like = 256 -- vbox, shifted hbox
43 local id_pbox = 257 -- already processed nodes (by \unhbox)
44 local id_pbox_w = 258 -- cluster which consists of a whatsit
45 local sid_user = node.subtype('user_defined')
47 local sid_start_link = node.subtype('pdf_start_link')
48 local sid_start_thread = node.subtype('pdf_start_thread')
49 local sid_end_link = node.subtype('pdf_end_link')
50 local sid_end_thread = node.subtype('pdf_end_thread')
52 local ITALIC = luatexja.icflag_table.ITALIC
53 local PACKED = luatexja.icflag_table.PACKED
54 local KINSOKU = luatexja.icflag_table.KINSOKU
55 local FROM_JFM = luatexja.icflag_table.FROM_JFM
56 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
57 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
58 local PROCESSED = luatexja.icflag_table.PROCESSED
59 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
60 local BOXBDD = luatexja.icflag_table.BOXBDD
61 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
64 local table_current_stack
66 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
67 local attr_icflag = luatexbase.attributes['ltj@icflag']
69 local function get_attr_icflag(p)
70 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
73 -------------------- Helper functions
75 local function copy_attr(new, old)
79 -- This function is called only for acquiring `special' characters.
80 local function fast_find_char_class(c,m)
81 return m.chars[c] or 0
85 local function slow_find_char_class(c, m, oc)
87 local cls = ltjf_find_char_class(oc, m)
88 if xc ~= oc and cls==0 then cls = ltjf_find_char_class(-xc, m) end
92 local zero_glue = node_new(id_glue)
93 spec_zero_glue = node_new(id_glue_spec) -- must be public, since mentioned from other sources
94 local spec_zero_glue = spec_zero_glue
95 spec_zero_glue.width = 0; spec_zero_glue.stretch_order = 0; spec_zero_glue.stretch = 0
96 spec_zero_glue.shrink_order = 0; spec_zero_glue.shrink = 0
97 zero_glue.spec = spec_zero_glue
99 local function skip_table_to_spec(n)
100 local g, st = node_new(id_glue_spec), ltjs.fast_get_skip_table(n)
101 g.width = st.width; g.stretch = st.stretch; g.shrink = st.shrink
102 g.stretch_order = st.stretch_order; g.shrink_order = st.shrink_order
108 local function add_penalty(p,e)
111 if e<=-10000 then pp = 0 end
112 elseif pp<=-10000 then
113 if e>=10000 then pp = 0 end
116 if pp>=10000 then p.penalty = 10000
117 elseif pp<=-10000 then p.penalty = -10000
118 else p.penalty = pp end
124 diffmet_rule = math.two_paverage
125 function math.two_add(a,b) return a+b end
126 function math.two_average(a,b) return (a+b)*0.5 end
127 function math.two_paverage(a,b) return (a+b)*0.5 end
128 function math.two_pleft(a,b) return a end
129 function math.two_pright(a,b) return b end
131 local head -- the head of current list
134 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
136 local ihb_flag -- JFM グルー挿入抑止用 flag
137 -- on: \inhibitglue 指定時,hlist の周囲
139 -------------------- hlist 内の文字の検索
141 local first_char, last_char, find_first_char
143 local function check_box(box_ptr, box_end)
144 local p = box_ptr; local found_visible_node = false
146 find_first_char = false; last_char = nil
149 while p and p~=box_end do
151 if pid==id_kern and p.subtype==2 then
152 p = node_next(node_next(node_next(p))); pid = p.id -- p must be glyph_node
154 if pid==id_glyph then
156 if find_first_char then
157 first_char = p; find_first_char = false
159 last_char = p; found_visible_node = true; p=node_next(p)
160 if (not p) or p==box_end then
161 return found_visible_node
164 pid = p.id -- p must be non-nil
167 if get_attr_icflag(p)==IC_PROCESSED then
169 elseif p.subtype==2 then
170 p = node_next(node_next(p));
171 -- Note that another node_next will be executed outside this if-statement.
173 found_visible_node = true
174 if find_first_char then
175 find_first_char = false
180 elseif pid==id_hlist then
181 if PACKED == get_attr_icflag(p) then
182 if find_first_char then
183 first_char = p.head; find_first_char = false
185 last_char = p.head; found_visible_node = true
188 if check_box(p.head, nil) then found_visible_node = true end
189 else if find_first_char then
190 find_first_char = false
196 elseif pid==id_math then
197 if find_first_char then
198 first_char = p; find_first_char = false
200 last_char = p; found_visible_node = true
201 elseif not (pid==id_ins or pid==id_mark
202 or pid==id_adjust or pid==id_whatsit
203 or pid==id_penalty) then
204 found_visible_node = true
205 if find_first_char then
206 find_first_char = false
213 return found_visible_node
216 function check_box_high(Nx, box_ptr, box_end)
217 first_char = nil; last_char = nil; find_first_char = true
218 if check_box(box_ptr, box_end) then
219 local first_char = first_char
221 if first_char.id==id_glyph then
222 if first_char.font == (has_attr(first_char, attr_curjfnt) or -1) then
223 set_np_xspc_jachar(Nx, first_char)
225 set_np_xspc_alchar(Nx, first_char.char,first_char, 1)
228 set_np_xspc_alchar(Nx, -1,first_char)
235 -------------------- Np の計算と情報取得
237 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
238 function (Np, lp, Nq)
239 if Np.nuc then return Np
241 return Np -- your code
244 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
245 function (stat, Nq, Np) return false end)
250 local function set_attr_icflag_processed(p)
251 if get_attr_icflag(p)<= ITALIC then
252 set_attr(p, attr_icflag, PROCESSED)
256 local function check_next_ickern(lp)
257 if lp.id == id_kern and ITALIC == get_attr_icflag(lp) then
258 set_attr(lp, attr_icflag, IC_PROCESSED)
259 Np.last = lp; return node_next(lp)
261 Np.last = Np.nuc; return lp
265 local function calc_np_pbox(lp, last)
266 Np.first = Np.first or lp; Np.id = id_pbox
267 local lpa = KINSOKU -- dummy=
268 set_attr(lp, attr_icflag, get_attr_icflag(lp));
269 while lp~=last and lpa>=PACKED and lpa<BOXBDD do
271 lp = node_next(lp); lpa = has_attr(lp, attr_icflag) or 0
272 -- get_attr_icflag() ではいけない!
274 return check_next_ickern(lp)
278 local calc_np_auxtable = {
279 [id_glyph] = function (lp)
280 Np.first, Np.nuc = (Np.first or lp), lp;
281 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
282 --set_attr_icflag_processed(lp) treated in ltj-setwidth.lua
283 return true, check_next_ickern(node_next(lp));
285 [id_hlist] = function(lp)
286 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
287 set_attr(lp, attr_icflag, PROCESSED)
288 --set_attr_icflag_processed(lp)
289 Np.id = (lp.shift~=0) and id_box_like or id_hlist
290 return true, node_next(lp)
292 box_like = function(lp)
293 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
294 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
295 -- set_attr_icflag_processed(lp);
296 return true, node_next(lp);
299 set_attr(lp, attr_icflag, PROCESSED)
300 -- set_attr_icflag_processed(lp);
301 return false, node_next(lp)
303 [id_whatsit] = function(lp)
304 if lp.subtype==sid_user then
305 if lp.user_id==luatexja.userid_table.IHB then
306 local lq = node_next(lp);
307 head = node.remove(head, lp); node.free(lp); ihb_flag = true
310 set_attr(lp, attr_icflag, PROCESSED)
311 -- set_attr_icflag_processed(lp)
312 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
315 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
316 return true, node_next(lp)
318 return false, node_next(lp)
322 -- we do special treatment for these whatsit nodes.
323 if lp.subtype == sid_start_link or lp.subtype == sid_start_thread then
325 elseif lp.subtype == sid_end_link or lp.subtype == sid_end_thread then
326 Np.first, Nq.last = nil, lp;
328 set_attr(lp, attr_icflag, PROCESSED)
329 -- set_attr_icflag_processed(lp);
330 return false, node_next(lp)
333 [id_math] = function(lp)
334 Np.first, Np.nuc = (Np.first or lp), lp;
335 set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
336 lp = node.end_of_math(lp)
337 set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
338 Np.last, Np.id = lp, id_math;
339 return true, node_next(lp);
341 discglue = function(lp)
342 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
343 Np.id = lp.id; set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
344 return true, node_next(lp)
346 [id_kern] = function(lp)
347 Np.first = Np.first or lp
348 if lp.subtype==2 then
349 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
350 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
351 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
352 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
353 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
354 return true, check_next_ickern(node_next(lp));
356 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED); -- set_attr_icflag_processed(lp);
357 Np.last = lp; return true, node_next(lp)
360 [id_penalty] = function(lp)
361 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED); -- set_attr_icflag_processed(lp);
362 return false, node_next(lp)
365 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
366 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
367 calc_np_auxtable[13] = calc_np_auxtable.box_like
368 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
369 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
370 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
371 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
372 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
375 function calc_np(lp, last)
377 -- We assume lp = node_next(Np.last)
378 Np, Nq, ihb_flag = Nq, Np, nil
379 -- We clear `predefined' entries of Np before pairs() loop,
380 -- because using only pairs() loop is slower.
381 Np.post, Np.pre, Np.xspc = nil, nil, nil
382 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
383 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
384 for k in pairs(Np) do Np[k] = nil end
386 for k = 1,#Bp do Bp[k] = nil end
388 local lpa = has_attr(lp, attr_icflag) or 0
391 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
392 local lq = node_next(lp)
393 head = node.remove(head, lp); node.free(lp); lp = lq
394 else return calc_np_pbox(lp, last)
397 k, lp = calc_np_auxtable[lp.id](lp)
398 if k then return lp end
405 local calc_np = calc_np
407 -- extract informations from Np
408 -- We think that "Np is a Japanese character" if Np.met~=nil,
409 -- "Np is an alphabetic character" if Np.pre~=nil,
410 -- "Np is not a character" otherwise.
412 local PRE = luatexja.stack_table_index.PRE
413 local POST = luatexja.stack_table_index.POST
414 local KCAT = luatexja.stack_table_index.KCAT
415 local XSP = luatexja.stack_table_index.XSP
418 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
419 local attr_orig_char = luatexbase.attributes['ltj@origchar']
420 local attr_autospc = luatexbase.attributes['ltj@autospc']
421 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
422 function set_np_xspc_jachar(Nx, x)
423 local m = ltjf_font_metric_table[x.font]
424 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, x.char)
425 Nx.met, Nx.char = m, c; Nx.class = cls;
426 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
427 Nx.pre = table_current_stack[PRE + c] or 0
428 Nx.post = table_current_stack[POST + c] or 0
429 Nx.xspc = table_current_stack[XSP + c] or 3
430 Nx.kcat = table_current_stack[KCAT + c] or 0
431 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
433 local set_np_xspc_jachar = set_np_xspc_jachar
436 local floor = math.floor
437 function set_np_xspc_alchar(Nx, c,x, lig)
439 local xc, xs = x.components, x.subtype
441 while xc and xs and xs%4>=2 do
442 x = xc; xc, xs = x.components, x.subtype
446 while xc and xs and xs%4>=2 do
447 x = node.tail(xc); xc, xs = x.components, x.subtype
451 Nx.pre = table_current_stack[PRE + c] or 0
452 Nx.post = table_current_stack[POST + c] or 0
453 Nx.xspc = table_current_stack[XSP + c] or 3
456 Nx.pre, Nx.post, Nx.char = 0, 0, -1
457 Nx.xspc = table_current_stack[XSP - 1] or 3
460 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
462 local set_np_xspc_alchar = set_np_xspc_alchar
465 function extract_np()
466 local x, i = Np.nuc, Np.id;
467 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
468 elseif i == id_glyph then return set_np_xspc_alchar(Np, x.char, x, 1)
469 elseif i == id_hlist then Np.last_char = check_box_high(Np, x.head, nil)
470 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
471 elseif i == id_disc then Np.last_char = check_box_high(Np, x.replace, nil)
472 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
476 -- change the information for the next loop
477 -- (will be done if Nx is an alphabetic character or a hlist)
478 function after_hlist(Nx)
479 local s = Nx.last_char
481 if s.id==id_glyph then
482 if s.font == (has_attr(s, attr_curjfnt) or -1) then
483 set_np_xspc_jachar(Nx, s)
485 set_np_xspc_alchar(Nx, s.char, s, 2)
488 set_np_xspc_alchar(Nx, -1, s)
491 Nx.pre, Nx.met = nil, nil
495 function after_alchar(Nx)
497 return set_np_xspc_alchar(Nx, x.char,x, 2)
501 local after_hlist, after_alchar, extract_np = after_hlist, after_alchar, extract_np
503 -------------------- 最下層の処理
505 -- change penalties (or create a new penalty, if needed)
506 local function handle_penalty_normal(post, pre, g)
507 local a = (pre or 0) + (post or 0)
509 if (a~=0 and not(g and g.id==id_kern)) then
510 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
511 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
513 head = insert_before(head, Np.first, p)
515 set_attr(p, attr_icflag, KINSOKU)
517 else for _, v in pairs(Bp) do add_penalty(v,a) end
521 local function handle_penalty_always(post, pre, g)
522 local a = (pre or 0) + (post or 0)
524 if not (g and g.id==id_glue) then
525 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
526 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
528 head = insert_before(head, Np.first, p)
530 set_attr(p, attr_icflag, KINSOKU)
532 else for _, v in pairs(Bp) do add_penalty(v,a) end
536 local function handle_penalty_suppress(post, pre, g)
537 local a = (pre or 0) + (post or 0)
539 if g and g.id==id_glue then
540 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
541 p.penalty = 10000; head = insert_before(head, Np.first, p)
543 set_attr(p, attr_icflag, KINSOKU)
545 else for _, v in pairs(Bp) do add_penalty(v,a) end
549 -- 和文文字間の JFM glue を node 化
550 local function new_jfm_glue(m, bc, ac)
551 -- bc, ac: char classes
552 local g, d = m.char_type[bc][ac], 0
555 n,d = node_copy(g[2]), g[3];
556 if g[1] then n.spec = node_copy(n.spec) end
561 -- Nq.last (kern w) .... (glue/kern g) Np.first
562 local function real_insert(g)
564 head = insert_before(head, Np.first, g)
570 -------------------- 和文文字間空白量の決定
575 local function get_kanjiskip_normal()
576 if Np.auto_kspc or Nq.auto_kspc then
577 return node_copy(kanji_skip)
579 local g = node_copy(zero_glue)
580 set_attr(g, attr_icflag, KANJI_SKIP)
584 local function get_kanjiskip_jfm()
586 if Np.auto_kspc or Nq.auto_kspc then
587 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
588 local gx = node_new(id_glue_spec);
589 gx.stretch_order, gx.shrink_order = 0, 0
590 local pm, qm = Np.met, Nq.met
591 local bk = qm.kanjiskip or {0, 0, 0}
592 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
593 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
595 local ak = pm.kanjiskip or {0, 0, 0}
596 gx.width = round(diffmet_rule(bk[1], ak[1]))
597 gx.stretch = round(diffmet_rule(bk[2], ak[2]))
598 gx.shrink = -round(diffmet_rule(-bk[3], -ak[3]))
602 g = node_copy(zero_glue)
604 set_attr(g, attr_icflag, KANJI_SKIP)
608 local function calc_ja_ja_aux(gb,ga, db, da)
609 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
610 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
611 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
612 and diffmet_rule ~= math.two_paverage then
613 rbb, rab, rba, raa = 1,0,0,1
616 if ga then gb = node_new(id_kern); gb.kern = 0 else return nil end
618 ga = node_new(id_kern); ga.kern = 0
621 local k = node.type(gb.id) .. node.type(ga.id)
622 if k == 'glueglue' then
624 gb.spec.width = round(diffmet_rule(
625 rbb*gb.spec.width + rba*ga.spec.width,
626 rab*gb.spec.width + raa*ga.spec.width ))
627 gb.spec.stretch = round(diffmet_rule(
628 rbb*gb.spec.stretch + rba*ga.spec.stretch,
629 rab*gb.spec.stretch + raa*ga.spec.stretch ))
630 gb.spec.shrink = -round(diffmet_rule(
631 -rbb*gb.spec.shrink - rba*ga.spec.shrink,
632 -rab*gb.spec.shrink - raa*ga.spec.shrink ))
635 elseif k == 'kernkern' then
637 gb.kern = round(diffmet_rule(
638 rbb*gb.kern + rba*ga.kern,
639 rab*gb.kern + raa*ga.kern ))
642 elseif k == 'kernglue' then
643 -- gb: kern, ga: glue
644 ga.spec.width = round(diffmet_rule(
645 rbb*gb.kern + rba*ga.spec.width,
646 rab*gb.kern + raa*ga.spec.width ))
647 ga.spec.stretch = round(diffmet_rule(
648 rba*ga.spec.stretch, raa*ga.spec.stretch ))
649 ga.spec.shrink = -round(diffmet_rule(
650 -rba*ga.spec.shrink,-raa*ga.spec.shrink ))
654 -- gb: glue, ga: kern
655 gb.spec.width = round(diffmet_rule(
656 rba*ga.kern + rbb*gb.spec.width,
657 raa*ga.kern + rab*gb.spec.width ))
658 gb.spec.stretch = round(diffmet_rule(
659 rbb*gb.spec.stretch, rab*gb.spec.stretch ))
660 gb.spec.shrink = -round(diffmet_rule(
661 -rbb*gb.spec.shrink,-rab*gb.spec.shrink ))
667 local function calc_ja_ja_glue()
668 if ihb_flag then return nil
670 local qm, pm = Nq.met, Np.met
671 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
672 return new_jfm_glue(qm, Nq.class, Np.class)
674 local npn, nqn = Np.nuc, Nq.nuc
675 local gb, db = new_jfm_glue(qm, Nq.class,
676 slow_find_char_class(has_attr(npn, attr_orig_char), qm, npn.char))
677 local ga, da = new_jfm_glue(pm,
678 slow_find_char_class(has_attr(nqn, attr_orig_char), pm, nqn.char),
680 return calc_ja_ja_aux(gb, ga, db, da);
685 -------------------- 和欧文間空白量の決定
689 local function get_xkanjiskip_normal(Nn)
690 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
691 return node_copy(xkanji_skip)
693 local g = node_copy(zero_glue)
694 set_attr(g, attr_icflag, XKANJI_SKIP)
698 local function get_xkanjiskip_jfm(Nn)
700 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
701 g = node_new(id_glue); --copy_attr(g, Nn.nuc)
702 local gx = node_new(id_glue_spec);
703 gx.stretch_order, gx.shrink_order = 0, 0
704 local bk = Nn.met.xkanjiskip or {0, 0, 0}
705 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
708 g = node_copy(zero_glue)
710 set_attr(g, attr_icflag, XKANJI_SKIP)
716 -------------------- 隣接した「塊」間の処理
718 local function get_OA_skip()
721 return new_jfm_glue(pm,
722 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
726 local function get_OB_skip()
729 return new_jfm_glue(qm, Nq.class,
730 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
735 -- (anything) .. jachar
736 local function handle_np_jachar(mode)
738 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
739 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
740 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
741 elseif Nq.met then -- qid==id_hlist
742 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
743 handle_penalty_normal(0, Np.pre, g); real_insert(g)
745 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
746 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
748 local g = get_OA_skip() -- O_A
749 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
750 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
751 else handle_penalty_always(0, Np.pre, g)
755 if mode and Np.kcat%2~=1 then
756 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
761 -- jachar .. (anything)
762 local function handle_nq_jachar()
764 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
765 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
767 local g = get_OB_skip() -- O_B
768 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
769 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
770 else handle_penalty_always(Nq.post, 0, g)
776 -- (anything) .. (和文文字で始まる hlist)
777 local function handle_np_ja_hlist()
779 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
780 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
781 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
782 elseif Nq.met then -- Nq.id==id_hlist
783 local g = get_kanjiskip() -- K
784 handle_penalty_suppress(0, 0, g); real_insert(g)
786 local g = get_xkanjiskip(Np) -- X
787 handle_penalty_suppress(0, 0, g); real_insert(g)
791 -- (和文文字で終わる hlist) .. (anything)
792 local function handle_nq_ja_hlist()
794 local g = get_xkanjiskip(Nq) -- X
795 handle_penalty_suppress(0, 0, g); real_insert(g)
800 -- Nq が前側のクラスタとなることによる修正
802 local adjust_nq_aux = {
803 [id_glyph] = function()
805 return set_np_xspc_alchar(Nq, x.char,x, 2)
806 end, -- after_alchar(Nq)
807 [id_hlist] = function() after_hlist(Nq) end,
808 [id_pbox] = function() after_hlist(Nq) end,
809 [id_disc] = function() after_hlist(Nq) end,
810 [id_pbox_w] = function()
811 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
817 local x = adjust_nq_aux[Nq.id]
823 -------------------- 開始・終了時の処理
826 local JWP = luatexja.stack_table_index.JWP
827 local function handle_list_tail(mode)
830 -- the current list is to be line-breaked.
831 -- Insert \jcharwidowpenalty
832 Bp = widow_Bp; Np = widow_Np
834 handle_penalty_normal(0,
835 table_current_stack[JWP] or 0)
838 -- the current list is the contents of a hbox
839 local npi, pm = Np.id, Np.met
840 if npi == id_jglyph or (npi==id_pbox and pm) then
841 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
843 set_attr(g, attr_icflag, BOXBDD)
844 head = node.insert_after(head, Np.last, g)
851 local function handle_list_head(par_indented)
852 local npi, pm = Np.id, Np.met
853 if npi == id_jglyph or (npi==id_pbox and pm) then
855 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
857 set_attr(g, attr_icflag, BOXBDD)
858 if g.id==id_glue and #Bp==0 then
859 local h = node_new(id_penalty); --copy_attr(h, Np.nuc)
860 h.penalty = 10000; set_attr(h, attr_icflag, BOXBDD)
862 head = insert_before(head, Np.first, g)
869 -- return value: (the initial cursor lp), (last node)
870 local function init_var(mode)
871 -- 1073741823: max_dimen
872 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
873 table_current_stack = ltjs.table_current_stack
875 kanji_skip = node_new(id_glue)
876 kanji_skip.spec = skip_table_to_spec('kanjiskip')
877 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
878 get_kanjiskip = (kanji_skip.spec.width == 1073741823)
879 and get_kanjiskip_jfm or get_kanjiskip_normal
881 xkanji_skip = node_new(id_glue)
882 xkanji_skip.spec = skip_table_to_spec('xkanjiskip')
883 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
884 get_xkanjiskip = (xkanji_skip.spec.width == 1073741823)
885 and get_xkanjiskip_jfm or get_xkanjiskip_normal
888 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
889 first=nil, id=nil, last=nil, met=nil, nuc=nil,
890 post=nil, pre=nil, xspc=nil,
893 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
894 first=nil, id=nil, last=nil, met=nil, nuc=nil,
895 post=nil, pre=nil, xspc=nil,
898 -- the current list is to be line-breaked:
899 -- hbox from \parindent is skipped.
900 local lp, par_indented, lpi, lps = head, 'boxbdd', head.id, head.subtype
901 while lp and ((lpi==id_whatsit and lps~=sid_user)
902 or ((lpi==id_hlist) and (lps==3))) do
903 if (lpi==id_hlist) and (lps==3) then par_indented = 'parbdd' end
904 lp=node_next(lp); lpi, lps = lp.id, lp.subtype end
905 return lp, node.tail(head), par_indented
907 -- the current list is the contents of a hbox:
909 local g = node_new(id_kern)
910 node.insert_after(head, node.tail(head), g); last = g
911 return head, g, 'boxbdd'
915 local function cleanup(mode, last)
916 -- adjust attr_icflag for avoiding error
917 tex.setattribute('global', attr_icflag, 0)
918 node.free(kanji_skip); node.free(xkanji_skip)
920 local h = node_next(head)
921 if h.id == id_penalty and h.penalty == 10000 then
923 if h.id == id_glue and h.subtype == 15 and not h.next then
929 head = node.remove(head, last); node.free(last);-- remove the sentinel
930 set_attr(head, attr_icflag,
931 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
935 -------------------- 外部から呼ばれる関数
938 function main(ahead, mode)
939 if not ahead then return ahead end
941 local lp, last, par_indented = init_var(mode);
942 lp = calc_np(lp, last)
944 extract_np(); handle_list_head(par_indented)
946 return cleanup(mode, last)
948 lp = calc_np(lp, last)
952 local pid, pm = Np.id, Np.met
954 if pid == id_jglyph then
955 handle_np_jachar(mode)
957 if pid==id_hlist then handle_np_ja_hlist()
958 else handle_np_jachar() end
960 if Nq.id==id_hlist then handle_nq_ja_hlist()
961 else handle_nq_jachar() end
963 lp = calc_np(lp, last)
965 handle_list_tail(mode)
966 return cleanup(mode, last)
970 local IHB = luatexja.userid_table.IHB
971 local BPAR = luatexja.userid_table.BPAR
974 function create_inhibitglue_node()
975 local tn = node_new(id_whatsit, sid_user)
976 tn.user_id=IHB; tn.type=100; tn.value=1
980 -- Node for indicating beginning of a paragraph
982 function create_beginpar_node()
983 local tn = node_new(id_whatsit, sid_user)
984 tn.user_id=BPAR; tn.type=100; tn.value=1
988 local function whatsit_callback(Np, lp, Nq)
989 if Np and Np.nuc then return Np
990 elseif Np and lp.user_id == BPAR then
991 Np.first = lp; Np.nuc = lp; Np.last = lp
994 Np.pre = 0; Np.post = 0
1001 local function whatsit_after_callback(s, Nq, Np)
1002 if not s and Nq.nuc.user_id == BPAR then
1003 local x, y = node.prev(Nq.nuc), Nq.nuc
1004 Nq.first, Nq.nuc, Nq.last = x, x, x
1005 head = node.remove(head, y)
1010 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1011 "luatexja.beginpar.np_info", 1)
1012 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1013 "luatexja.beginpar.np_info_after", 1)