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 ltjf_font_metric_table = ltjf.font_metric_table
23 local ltjf_find_char_class = ltjf.find_char_class
24 local node_new = node.new
25 local node_copy = node.copy
27 local ligature_head = 1
28 local ligature_tail = 2
30 local id_glyph = node.id('glyph')
31 local id_hlist = node.id('hlist')
32 local id_vlist = node.id('vlist')
33 local id_rule = node.id('rule')
34 local id_ins = node.id('ins')
35 local id_mark = node.id('mark')
36 local id_adjust = node.id('adjust')
37 local id_disc = node.id('disc')
38 local id_whatsit = node.id('whatsit')
39 local id_math = node.id('math')
40 local id_glue = node.id('glue')
41 local id_kern = node.id('kern')
42 local id_penalty = node.id('penalty')
44 local id_glue_spec = node.id('glue_spec')
45 local id_jglyph = 512 -- Japanese character
46 local id_box_like = 256 -- vbox, shifted hbox
47 local id_pbox = 257 -- already processed nodes (by \unhbox)
48 local id_pbox_w = 258 -- cluster which consists of a whatsit
49 local sid_user = node.subtype('user_defined')
51 local sid_start_link = node.subtype('pdf_start_link')
52 local sid_start_thread = node.subtype('pdf_start_thread')
53 local sid_end_link = node.subtype('pdf_end_link')
54 local sid_end_thread = node.subtype('pdf_end_thread')
56 local ITALIC = luatexja.icflag_table.ITALIC
57 local PACKED = luatexja.icflag_table.PACKED
58 local KINSOKU = luatexja.icflag_table.KINSOKU
59 local FROM_JFM = luatexja.icflag_table.FROM_JFM
60 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
61 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
62 local PROCESSED = luatexja.icflag_table.PROCESSED
63 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
64 local BOXBDD = luatexja.icflag_table.BOXBDD
65 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
68 local table_current_stack
70 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
71 local attr_icflag = luatexbase.attributes['ltj@icflag']
73 local function get_attr_icflag(p)
74 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
77 -------------------- Helper functions
79 local function copy_attr(new, old)
83 -- This function is called only for acquiring `special' characters.
84 local function fast_find_char_class(c,m)
85 return m.chars[c] or 0
89 local function slow_find_char_class(c, m, oc)
91 local cls = ltjf_find_char_class(oc, m)
92 if xc ~= oc and cls==0 then cls, xc = ltjf_find_char_class(-xc, m) end
96 local zero_glue = node_new(id_glue)
97 spec_zero_glue = node_new(id_glue_spec) -- must be public, since mentioned from other sources
98 local spec_zero_glue = spec_zero_glue
99 spec_zero_glue.width = 0; spec_zero_glue.stretch_order = 0; spec_zero_glue.stretch = 0
100 spec_zero_glue.shrink_order = 0; spec_zero_glue.shrink = 0
101 zero_glue.spec = spec_zero_glue
103 local function skip_table_to_spec(n)
104 local g, st = node_new(id_glue_spec), ltjs.fast_get_skip_table(n)
105 g.width = st.width; g.stretch = st.stretch; g.shrink = st.shrink
106 g.stretch_order = st.stretch_order; g.shrink_order = st.shrink_order
112 local function add_penalty(p,e)
115 if e<=-10000 then pp = 0 end
116 elseif pp<=-10000 then
117 if e>=10000 then pp = 0 end
120 if pp>=10000 then p.penalty = 10000
121 elseif pp<=-10000 then p.penalty = -10000
122 else p.penalty = pp end
128 diffmet_rule = math.two_paverage
129 function math.two_add(a,b) return a+b end
130 function math.two_average(a,b) return (a+b)*0.5 end
131 function math.two_paverage(a,b) return (a+b)*0.5 end
132 function math.two_pleft(a,b) return a end
133 function math.two_pright(a,b) return b end
135 local head -- the head of current list
138 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
140 local ihb_flag -- JFM グルー挿入抑止用 flag
141 -- on: \inhibitglue 指定時,hlist の周囲
143 -------------------- hlist 内の文字の検索
145 local first_char, last_char, find_first_char
147 local function check_box(box_ptr, box_end)
148 local p = box_ptr; local found_visible_node = false
150 find_first_char = false; first_char = nil; last_char = nil
153 while p and p~=box_end do
155 if pid==id_kern and p.subtype==2 then
156 p = node_next(node_next(node_next(p))); pid = p.id -- p must be glyph_node
158 if pid==id_glyph then
160 if find_first_char then
161 first_char = p; find_first_char = false
163 last_char = p; found_visible_node = true; p=node_next(p)
164 if (not p) or p==box_end then return found_visible_node end
166 pid = p.id -- p must be non-nil
169 if get_attr_icflag(p)==IC_PROCESSED then
171 elseif p.subtype==2 then
172 p = node_next(node_next(p));
173 -- Note that another node_next will be executed outside this if-statement.
175 found_visible_node = true
176 if find_first_char then
177 find_first_char = false
182 elseif pid==id_hlist then
183 if PACKED == get_attr_icflag(p) then
184 if find_first_char then
185 first_char = p.head; find_first_char = false
187 last_char = p.head; found_visible_node = true
190 if check_box(p.head, nil) then found_visible_node = true end
191 else if find_first_char then
192 find_first_char = false
198 elseif pid==id_math then
199 if find_first_char then
200 first_char = p; find_first_char = false
202 last_char = p; found_visible_node = true
203 elseif not (pid==id_ins or pid==id_mark
204 or pid==id_adjust or pid==id_whatsit
205 or pid==id_penalty) then
206 found_visible_node = true
207 if find_first_char then
208 find_first_char = false
215 return found_visible_node
218 function check_box_high(Nx, box_ptr, box_end)
219 first_char = nil; last_char = nil; find_first_char = true
220 if check_box(box_ptr, box_end) then
221 local first_char = first_char
223 if first_char.id==glyph_node then
224 if first_char.font == (has_attr(first_char, attr_curjfnt) or -1) then
225 set_np_xspc_jachar(Nx, first_char)
227 set_np_xspc_alchar(Nx, first_char.char,first_char, ligature_head)
230 set_np_xspc_alchar(Nx, -1,first_char)
237 -------------------- Np の計算と情報取得
239 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
240 function (Np, lp, Nq)
241 if Np.nuc then return Np
243 return Np -- your code
246 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
247 function (stat, Nq, Np) return false end)
252 local function set_attr_icflag_processed(p)
253 if get_attr_icflag(p)<= ITALIC then
254 set_attr(p, attr_icflag, PROCESSED)
258 local function check_next_ickern(lp)
259 if lp.id == id_kern and ITALIC == get_attr_icflag(lp) then
260 set_attr(lp, attr_icflag, IC_PROCESSED)
261 Np.last = lp; return node_next(lp)
263 Np.last = Np.nuc; return lp
267 local function calc_np_pbox(lp, last)
268 Np.first = Np.first or lp; Np.id = id_pbox
269 local lpa = KINSOKU -- dummy=
270 set_attr(lp, attr_icflag, get_attr_icflag(lp));
271 while lp~=last and lpa>=PACKED and lpa<BOXBDD do
273 lp = node_next(lp); lpa = has_attr(lp, attr_icflag) or 0
274 -- get_attr_icflag() ではいけない!
276 return check_next_ickern(lp)
280 local calc_np_auxtable = {
281 [id_glyph] = function (lp)
282 Np.first, Np.nuc = (Np.first or lp), lp;
283 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
284 --set_attr_icflag_processed(lp) treated in ltj-setwidth.lua
285 return true, check_next_ickern(node_next(lp));
287 [id_hlist] = function(lp)
288 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
289 set_attr(lp, attr_icflag, PROCESSED)
290 --set_attr_icflag_processed(lp)
291 Np.id = (lp.shift~=0) and id_box_like or id_hlist
292 return true, node_next(lp)
294 box_like = function(lp)
295 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
296 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
297 -- set_attr_icflag_processed(lp);
298 return true, node_next(lp);
301 set_attr(lp, attr_icflag, PROCESSED)
302 -- set_attr_icflag_processed(lp);
303 return false, node_next(lp)
305 [id_whatsit] = function(lp)
306 if lp.subtype==sid_user then
307 if lp.user_id==30111 then
308 local lq = node_next(lp);
309 head = node.remove(head, lp); node.free(lp); ihb_flag = true
312 set_attr(lp, attr_icflag, PROCESSED)
313 -- set_attr_icflag_processed(lp)
314 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
317 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
318 return true, node_next(lp)
320 return false, node_next(lp)
324 -- we do special treatment for these whatsit nodes.
325 if lp.subtype == sid_start_link or lp.subtype == sid_start_thread then
327 elseif lp.subtype == sid_end_link or lp.subtype == sid_end_thread then
328 Np.first, Nq.last = nil, lp;
330 set_attr(lp, attr_icflag, PROCESSED)
331 -- set_attr_icflag_processed(lp);
332 return false, node_next(lp)
335 [id_math] = function(lp)
336 Np.first, Np.nuc = (Np.first or lp), lp;
337 set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
339 while lp.id~=id_math do
340 set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
343 set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
344 Np.last, Np.id = lp, id_math;
345 return true, node_next(lp);
347 discglue = function(lp)
348 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
349 Np.id = lp.id; set_attr(lp, attr_icflag, PROCESSED) -- set_attr_icflag_processed(lp);
350 return true, node_next(lp)
352 [id_kern] = function(lp)
353 Np.first = Np.first or lp
354 if lp.subtype==2 then
355 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
356 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
357 set_attr(lp, attr_icflag, PROCESSED); Np = node_next(lp)
358 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
359 Np.id = (lp.font == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
360 return true, check_next_ickern(node_next(lp));
362 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED); -- set_attr_icflag_processed(lp);
363 Np.last = lp; return true, node_next(lp)
366 [id_penalty] = function(lp)
367 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED); -- set_attr_icflag_processed(lp);
368 return false, node_next(lp)
371 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
372 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
373 calc_np_auxtable[13] = calc_np_auxtable.box_like
374 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
375 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
376 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
377 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
378 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
381 function calc_np(lp, last)
383 -- We assume lp = node_next(Np.last)
384 Np, Nq, ihb_flag = Nq, Np, nil
385 -- We clear `predefined' entries of Np before pairs() loop,
386 -- because using only pairs() loop is slower.
387 Np.post, Np.pre, Np.xspc = nil, nil, nil
388 Np.first, Np.id, Np.last, Np.met = nil, nil, nil
389 Np.auto_kspc, Np.auto_xspc, Np.char, Np.class, Np.nuc = nil, nil, nil, nil, nil
390 for k in pairs(Np) do Np[k] = nil end
392 for k = 1,#Bp do Bp[k] = nil end
394 local lpa = has_attr(lp, attr_icflag) or 0
397 if lpa == BOXBDD then
398 local lq = node_next(lp)
399 head = node.remove(head, lp); node.free(lp); lp = lq
400 else return calc_np_pbox(lp, last)
403 k, lp = calc_np_auxtable[lp.id](lp)
404 if k then return lp end
411 local calc_np = calc_np
413 -- extract informations from Np
414 -- We think that "Np is a Japanese character" if Np.met~=nil,
415 -- "Np is an alphabetic character" if Np.pre~=nil,
416 -- "Np is not a character" otherwise.
418 local PRE = luatexja.stack_table_index.PRE
419 local POST = luatexja.stack_table_index.POST
420 local KCAT = luatexja.stack_table_index.KCAT
421 local XSP = luatexja.stack_table_index.XSP
424 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
425 local attr_orig_char = luatexbase.attributes['ltj@origchar']
426 local attr_autospc = luatexbase.attributes['ltj@autospc']
427 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
428 function set_np_xspc_jachar(Nx, x)
429 local m = ltjf_font_metric_table[x.font]
430 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, x.char)
431 Nx.class = cls; set_attr(x, attr_jchar_class, cls)
432 Nx.met, Nx.char = m, c
433 Nx.pre = table_current_stack[PRE + c] or 0
434 Nx.post = table_current_stack[POST + c] or 0
435 Nx.xspc = table_current_stack[XSP + c] or 3
436 Nx.kcat = table_current_stack[KCAT + c] or 0
437 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
439 local set_np_xspc_jachar = set_np_xspc_jachar
442 local floor = math.floor
443 function set_np_xspc_alchar(Nx, c,x, lig)
445 local xc, xs = x.components, x.subtype
446 if lig == ligature_head then
447 while xc and xs and xs%4>=2 do
448 x = xc; xc, xs = x.components, x.subtype
452 while xc and xs and xs%4>=2 do
453 x = node.tail(xc); xc, xs = x.components, x.subtype
457 Nx.pre = table_current_stack[PRE + c] or 0
458 Nx.post = table_current_stack[POST + c] or 0
459 Nx.xspc = table_current_stack[XSP + c] or 3
462 Nx.pre, Nx.post, Nx.char = 0, 0, -1
463 Nx.xspc = table_current_stack[XSP - 1] or 3
466 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
468 local set_np_xspc_alchar = set_np_xspc_alchar
471 function extract_np()
472 local x, i = Np.nuc, Np.id;
473 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
474 elseif i == id_glyph then return set_np_xspc_alchar(Np, x.char, x, ligature_head)
475 elseif i == id_hlist then Np.last_char = check_box_high(Np, x.head, nil)
476 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
477 elseif i == id_disc then Np.last_char = check_box_high(Np, x.replace, nil)
478 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
482 -- change the information for the next loop
483 -- (will be done if Nx is an alphabetic character or a hlist)
484 function after_hlist(Nx)
485 local s = Nx.last_char
487 if s.id==glyph_node then
488 if s.font == (has_attr(s, attr_curjfnt) or -1) then
489 set_np_xspc_jachar(Nx, s)
491 set_np_xspc_alchar(Nx, s.char, s, ligature_tail)
494 set_np_xspc_alchar(Nx, -1, s)
497 Nx.pre, Nx.met = nil, nil
501 function after_alchar(Nx)
503 return set_np_xspc_alchar(Nx, x.char,x, ligature_tail)
507 local after_hlist, after_alchar, extract_np = after_hlist, after_alchar, extract_np
509 -------------------- 最下層の処理
511 -- change penalties (or create a new penalty, if needed)
512 local function handle_penalty_normal(post, pre, g)
513 local a = (pre or 0) + (post or 0)
515 if (a~=0 and not(g and g.id==id_kern)) then
516 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
517 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
519 head = insert_before(head, Np.first, p)
521 set_attr(p, attr_icflag, KINSOKU)
523 else for _, v in pairs(Bp) do add_penalty(v,a) end
527 local function handle_penalty_always(post, pre, g)
528 local a = (pre or 0) + (post or 0)
530 if not (g and g.id==id_glue) then
531 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
532 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
534 head = insert_before(head, Np.first, p)
536 set_attr(p, attr_icflag, KINSOKU)
538 else for _, v in pairs(Bp) do add_penalty(v,a) end
542 local function handle_penalty_suppress(post, pre, g)
543 local a = (pre or 0) + (post or 0)
545 if g and g.id==id_glue then
546 local p = node_new(id_penalty); --copy_attr(p, Nq.nuc)
547 p.penalty = 10000; head = insert_before(head, Np.first, p)
549 set_attr(p, attr_icflag, KINSOKU)
551 else for _, v in pairs(Bp) do add_penalty(v,a) end
555 -- 和文文字間の JFM glue を node 化
556 local function new_jfm_glue(m, bc, ac)
557 -- bc, ac: char classes
558 local z = m.char_type[bc]
559 local g, d = z.glue[ac], 0
561 g,d = node_copy(g[1]), g[2];
562 g.spec = node_copy(g.spec); -- node_copy は spec をコピーする
566 g = node_new(id_kern); --copy_attr(g, Nn.nuc)
567 g.subtype = 1; g.kern, d = k[1], k[2]
568 set_attr(g, attr_icflag, FROM_JFM);
574 -- Nq.last (kern w) .... (glue/kern g) Np.first
575 local function real_insert(g)
577 head = insert_before(head, Np.first, g)
583 -------------------- 和文文字間空白量の決定
588 local function get_kanjiskip_normal()
589 if Np.auto_kspc or Nq.auto_kspc then
590 return node_copy(kanji_skip)
592 local g = node_copy(zero_glue)
593 set_attr(g, attr_icflag, KANJI_SKIP)
597 local function get_kanjiskip_jfm()
599 if Np.auto_kspc or Nq.auto_kspc then
600 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
601 local gx = node_new(id_glue_spec);
602 gx.stretch_order, gx.shrink_order = 0, 0
603 local pm, qm = Np.met, Nq.met
604 local bk = qm.kanjiskip or {0, 0, 0}
605 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
606 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
608 local ak = pm.kanjiskip or {0, 0, 0}
609 gx.width = round(diffmet_rule(bk[1], ak[1]))
610 gx.stretch = round(diffmet_rule(bk[2], ak[2]))
611 gx.shrink = -round(diffmet_rule(-bk[3], -ak[3]))
615 g = node_copy(zero_glue)
617 set_attr(g, attr_icflag, KANJI_SKIP)
621 local function calc_ja_ja_aux(gb,ga, db, da)
622 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
623 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
624 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
625 and diffmet_rule ~= math.two_paverage then
626 rbb, rab, rba, raa = 1,0,0,1
629 if ga then gb = node_new(id_kern); gb.kern = 0 else return nil end
631 ga = node_new(id_kern); ga.kern = 0
634 local k = node.type(gb.id) .. node.type(ga.id)
635 if k == 'glueglue' then
637 gb.spec.width = round(diffmet_rule(
638 rbb*gb.spec.width + rba*ga.spec.width,
639 rab*gb.spec.width + raa*ga.spec.width ))
640 gb.spec.stretch = round(diffmet_rule(
641 rbb*gb.spec.stretch + rba*ga.spec.stretch,
642 rab*gb.spec.stretch + raa*ga.spec.stretch ))
643 gb.spec.shrink = -round(diffmet_rule(
644 -rbb*gb.spec.shrink - rba*ga.spec.shrink,
645 -rab*gb.spec.shrink - raa*ga.spec.shrink ))
648 elseif k == 'kernkern' then
650 gb.kern = round(diffmet_rule(
651 rbb*gb.kern + rba*ga.kern,
652 rab*gb.kern + raa*ga.kern ))
655 elseif k == 'kernglue' then
656 -- gb: kern, ga: glue
657 ga.spec.width = round(diffmet_rule(
658 rbb*gb.kern + rba*ga.spec.width,
659 rab*gb.kern + raa*ga.spec.width ))
660 ga.spec.stretch = round(diffmet_rule(
661 rba*ga.spec.stretch, raa*ga.spec.stretch ))
662 ga.spec.shrink = -round(diffmet_rule(
663 -rba*ga.spec.shrink,-raa*ga.spec.shrink ))
667 -- gb: glue, ga: kern
668 gb.spec.width = round(diffmet_rule(
669 rba*ga.kern + rbb*gb.spec.width,
670 raa*ga.kern + rab*gb.spec.width ))
671 gb.spec.stretch = round(diffmet_rule(
672 rbb*gb.spec.stretch, rab*gb.spec.stretch ))
673 gb.spec.shrink = -round(diffmet_rule(
674 -rbb*gb.spec.shrink,-rab*gb.spec.shrink ))
680 local function calc_ja_ja_glue()
681 if ihb_flag then return nil
683 local qm, pm = Nq.met, Np.met
684 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
685 return new_jfm_glue(qm, Nq.class, Np.class)
687 local npn, nqn = Np.nuc, Nq.nuc
688 local gb, db = new_jfm_glue(qm, Nq.class,
689 slow_find_char_class(has_attr(npn, attr_orig_char), qm, npn.char))
690 local ga, da = new_jfm_glue(pm,
691 slow_find_char_class(has_attr(nqn, attr_orig_char), pm, nqn.char),
693 return calc_ja_ja_aux(gb, ga, db, da);
698 -------------------- 和欧文間空白量の決定
702 local function get_xkanjiskip_normal(Nn)
703 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
704 return node_copy(xkanji_skip)
706 local g = node_copy(zero_glue)
707 set_attr(g, attr_icflag, XKANJI_SKIP)
711 local function get_xkanjiskip_jfm(Nn)
713 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
714 g = node_new(id_glue); --copy_attr(g, Nn.nuc)
715 local gx = node_new(id_glue_spec);
716 gx.stretch_order, gx.shrink_order = 0, 0
717 local bk = Nn.met.xkanjiskip or {0, 0, 0}
718 gx.width = bk[1]; gx.stretch = bk[2]; gx.shrink = bk[3]
721 g = node_copy(zero_glue)
723 set_attr(g, attr_icflag, XKANJI_SKIP)
729 -------------------- 隣接した「塊」間の処理
731 local function get_OA_skip()
734 return new_jfm_glue(pm,
735 fast_find_char_class(((Nq.id == id_math and -1) or 'jcharbdd'), pm), Np.class)
739 local function get_OB_skip()
742 return new_jfm_glue(qm, Nq.class,
743 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
748 -- (anything) .. jachar
749 local function handle_np_jachar(mode)
751 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
752 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
753 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
754 elseif Nq.met then -- qid==id_hlist
755 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
756 handle_penalty_normal(0, Np.pre, g); real_insert(g)
758 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
759 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
761 local g = get_OA_skip() -- O_A
762 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
763 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
764 else handle_penalty_always(0, Np.pre, g)
768 if mode and Np.kcat%2~=1 then
769 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
774 -- jachar .. (anything)
775 local function handle_nq_jachar()
777 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
778 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
780 local g = get_OB_skip() -- O_B
781 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
782 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
783 else handle_penalty_always(Nq.post, 0, g)
789 -- (anything) .. (和文文字で始まる hlist)
790 local function handle_np_ja_hlist()
792 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
793 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
794 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
795 elseif Nq.met then -- Nq.id==id_hlist
796 local g = get_kanjiskip() -- K
797 handle_penalty_suppress(0, 0, g); real_insert(g)
799 local g = get_xkanjiskip(Np) -- X
800 handle_penalty_suppress(0, 0, g); real_insert(g)
804 -- (和文文字で終わる hlist) .. (anything)
805 local function handle_nq_ja_hlist()
807 local g = get_xkanjiskip(Nq) -- X
808 handle_penalty_suppress(0, 0, g); real_insert(g)
813 -- Nq が前側のクラスタとなることによる修正
815 local adjust_nq_aux = {
816 [id_glyph] = function()
818 return set_np_xspc_alchar(Nq, x.char,x, 2)
819 end, -- after_alchar(Nq)
820 [id_hlist] = function() after_hlist(Nq) end,
821 [id_pbox] = function() after_hlist(Nq) end,
822 [id_disc] = function() after_hlist(Nq) end,
823 [id_pbox_w] = function()
824 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
830 local x = adjust_nq_aux[Nq.id]
836 -------------------- 開始・終了時の処理
839 local JWP = luatexja.stack_table_index.JWP
840 local function handle_list_tail(mode)
843 -- the current list is to be line-breaked.
844 -- Insert \jcharwidowpenalty
845 Bp = widow_Bp; Np = widow_Np
847 handle_penalty_normal(0,
848 table_current_stack[JWP] or 0)
851 -- the current list is the contents of a hbox
852 local npi, pm = Np.id, Np.met
853 if npi == id_jglyph or (npi==id_pbox and pm) then
854 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
856 set_attr(g, attr_icflag, BOXBDD)
857 head = node.insert_after(head, Np.last, g)
864 local function handle_list_head(par_indented)
865 local npi, pm = Np.id, Np.met
866 if npi == id_jglyph or (npi==id_pbox and pm) then
868 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
870 set_attr(g, attr_icflag, BOXBDD)
871 if g.id==id_glue and #Bp==0 then
872 local h = node_new(id_penalty); --copy_attr(h, Np.nuc)
873 h.penalty = 10000; set_attr(h, attr_icflag, BOXBDD)
875 head = insert_before(head, Np.first, g)
882 -- return value: (the initial cursor lp), (last node)
883 local function init_var(mode)
884 -- 1073741823: max_dimen
885 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
886 table_current_stack = ltjs.table_current_stack
888 kanji_skip = node_new(id_glue)
889 kanji_skip.spec = skip_table_to_spec('kanjiskip')
890 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
891 get_kanjiskip = (kanji_skip.spec.width == 1073741823)
892 and get_kanjiskip_jfm or get_kanjiskip_normal
894 xkanji_skip = node_new(id_glue)
895 xkanji_skip.spec = skip_table_to_spec('xkanjiskip')
896 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
897 get_xkanjiskip = (xkanji_skip.spec.width == 1073741823)
898 and get_xkanjiskip_jfm or get_xkanjiskip_normal
901 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
902 first=nil, id=nil, last=nil, met=nil, nuc=nil,
903 post=nil, pre=nil, xspc=nil,
906 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
907 first=nil, id=nil, last=nil, met=nil, nuc=nil,
908 post=nil, pre=nil, xspc=nil,
911 -- the current list is to be line-breaked:
912 -- hbox from \parindent is skipped.
913 local lp, par_indented, lpi, lps = head, 'boxbdd', head.id, head.subtype
914 while lp and ((lpi==id_whatsit and lps~=sid_user)
915 or ((lpi==id_hlist) and (lps==3))) do
916 if (lpi==id_hlist) and (lps==3) then par_indented = 'parbdd' end
917 lp=node_next(lp); lpi, lps = lp.id, lp.subtype end
918 return lp, node.tail(head), par_indented
920 -- the current list is the contents of a hbox:
922 local g = node_new(id_kern)
923 node.insert_after(head, node.tail(head), g); last = g
924 return head, g, 'boxbdd'
928 local function cleanup(mode, last)
929 -- adjust attr_icflag for avoiding error
930 tex.setattribute('global', attr_icflag, 0)
931 node.free(kanji_skip); node.free(xkanji_skip)
933 local h = node_next(head)
934 if h.id == id_penalty and h.penalty == 10000 then
936 if h.id == id_glue and h.subtype == 15 and not h.next then
942 head = node.remove(head, last); node.free(last);-- remove the sentinel
943 set_attr(head, attr_icflag,
944 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
948 -------------------- 外部から呼ばれる関数
951 function main(ahead, mode)
952 if not ahead then return ahead end
954 local lp, last, par_indented = init_var(mode);
955 lp = calc_np(lp, last)
957 extract_np(); handle_list_head(par_indented)
959 return cleanup(mode, last)
961 lp = calc_np(lp, last)
963 extract_np(); adjust_nq()
964 local pid, pm = Np.id, Np.met
966 if pid == id_jglyph then
967 handle_np_jachar(mode)
969 if pid==id_hlist then handle_np_ja_hlist()
970 else handle_np_jachar() end
972 if Nq.id==id_hlist then handle_nq_ja_hlist()
973 else handle_nq_jachar() end
975 lp = calc_np(lp, last)
977 handle_list_tail(mode)
978 return cleanup(mode, last)
983 function create_inhibitglue_node()
984 local tn = node_new(id_whatsit, sid_user)
985 tn.user_id=30111; tn.type=100; tn.value=1
989 -- Node for indicating beginning of a paragraph
991 function create_beginpar_node()
992 local tn = node_new(id_whatsit, sid_user)
993 tn.user_id=30114; tn.type=100; tn.value=1
999 local function whatsit_callback(Np, lp, Nq)
1000 if Np and Np.nuc then return Np
1001 elseif Np and lp.user_id == 30114 then
1002 Np.first = lp; Np.nuc = lp; Np.last = lp
1005 Np.pre = 0; Np.post = 0
1007 Np.auto_xspc = false
1013 local function whatsit_after_callback(s, Nq, Np)
1014 if not s and Nq.nuc.user_id == 30114 then
1015 local x, y = node.prev(Nq.nuc), Nq.nuc
1016 Nq.first, Nq.nuc, Nq.last = x, x, x
1017 head = node.remove(head, y)
1022 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1023 "luatexja.beginpar.np_info", 1)
1024 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1025 "luatexja.beginpar.np_info_after", 1)