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
16 local Dnode = node.direct or node
18 local nullfunc = function(n) return n end
19 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
20 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
22 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
23 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
24 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
25 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
26 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
27 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
28 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
30 local has_attr = Dnode.has_attribute
31 local set_attr = Dnode.set_attribute
32 local insert_before = Dnode.insert_before
33 local insert_after = Dnode.insert_after
34 local node_next = Dnode.getnext
35 local round = tex.round
36 local ltjf_font_metric_table = ltjf.font_metric_table
37 local ltjf_find_char_class = ltjf.find_char_class
38 local node_new = Dnode.new
39 local node_copy = Dnode.copy
40 local node_remove = Dnode.remove
41 local node_tail = Dnode.tail
42 local node_free = Dnode.free
43 local node_end_of_math = Dnode.end_of_math
46 local id_glyph = node.id('glyph')
47 local id_hlist = node.id('hlist')
48 local id_vlist = node.id('vlist')
49 local id_rule = node.id('rule')
50 local id_ins = node.id('ins')
51 local id_mark = node.id('mark')
52 local id_adjust = node.id('adjust')
53 local id_disc = node.id('disc')
54 local id_whatsit = node.id('whatsit')
55 local id_math = node.id('math')
56 local id_glue = node.id('glue')
57 local id_kern = node.id('kern')
58 local id_penalty = node.id('penalty')
60 local id_glue_spec = node.id('glue_spec')
61 local id_jglyph = 512 -- Japanese character
62 local id_box_like = 256 -- vbox, shifted hbox
63 local id_pbox = 257 -- already processed nodes (by \unhbox)
64 local id_pbox_w = 258 -- cluster which consists of a whatsit
65 local sid_user = node.subtype('user_defined')
67 local sid_start_link = node.subtype('pdf_start_link')
68 local sid_start_thread = node.subtype('pdf_start_thread')
69 local sid_end_link = node.subtype('pdf_end_link')
70 local sid_end_thread = node.subtype('pdf_end_thread')
72 local ITALIC = luatexja.icflag_table.ITALIC
73 local PACKED = luatexja.icflag_table.PACKED
74 local KINSOKU = luatexja.icflag_table.KINSOKU
75 local FROM_JFM = luatexja.icflag_table.FROM_JFM
76 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
77 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
78 local PROCESSED = luatexja.icflag_table.PROCESSED
79 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
80 local BOXBDD = luatexja.icflag_table.BOXBDD
81 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
84 local table_current_stack
86 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
87 local attr_icflag = luatexbase.attributes['ltj@icflag']
89 local function get_attr_icflag(p)
90 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
93 -------------------- Helper functions
95 local function copy_attr(new, old)
99 -- This function is called only for acquiring `special' characters.
100 local function fast_find_char_class(c,m)
101 return m.chars[c] or 0
105 local function slow_find_char_class(c, m, oc)
107 local cls = ltjf_find_char_class(oc, m)
108 if xc ~= oc and cls==0 then cls = ltjf_find_char_class(-xc, m) end
112 local zero_glue = node_new(id_glue)
113 spec_zero_glue = to_node(node_new(id_glue_spec))
114 -- must be public, since mentioned from other sources
115 local spec_zero_glue = to_direct(spec_zero_glue)
116 setfield(spec_zero_glue, 'width', 0)
117 setfield(spec_zero_glue, 'stretch', 0)
118 setfield(spec_zero_glue, 'shrink', 0)
119 setfield(spec_zero_glue, 'stretch_order', 0)
120 setfield(spec_zero_glue, 'shrink_order', 0)
121 setfield(zero_glue, 'spec', spec_zero_glue)
123 local function skip_table_to_spec(n)
124 local g, st = node_new(id_glue_spec), ltjs.fast_get_skip_table(n)
125 setfield(g, 'width', st.width)
126 setfield(g, 'stretch', st.stretch)
127 setfield(g, 'shrink', st.shrink)
128 setfield(g, 'stretch_order', st.stretch_order)
129 setfield(g, 'shrink_order', st.shrink_order)
135 local function add_penalty(p,e)
136 local pp = getfield(p, 'penalty')
138 if e<=-10000 then pp = 0 end
139 elseif pp<=-10000 then
140 if e>=10000 then pp = 0 end
143 if pp>=10000 then setfield(p, 'penalty', 10000)
144 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
145 else setfield(p, 'penalty', pp) end
151 diffmet_rule = math.two_paverage
152 function math.two_add(a,b) return a+b end
153 function math.two_average(a,b) return (a+b)*0.5 end
154 function math.two_paverage(a,b) return (a+b)/2 end
155 function math.two_pleft(a,b) return a end
156 function math.two_pright(a,b) return b end
158 local head -- the head of current list
161 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
163 local ihb_flag -- JFM グルー挿入抑止用 flag
164 -- on: \inhibitglue 指定時,hlist の周囲
166 -------------------- hlist 内の文字の検索
168 local first_char, last_char, find_first_char
170 local function check_box(box_ptr, box_end)
171 local p = box_ptr; local found_visible_node = false
173 find_first_char = false; last_char = nil
176 while p and p~=box_end do
178 if pid==id_kern and getsubtype(p)==2 then
179 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
181 if pid==id_glyph then
183 if find_first_char then
184 first_char = p; find_first_char = false
186 last_char = p; found_visible_node = true; p=node_next(p)
187 if (not p) or p==box_end then
188 return found_visible_node
190 until getid(p)~=id_glyph
191 pid = getid(p) -- p must be non-nil
194 if get_attr_icflag(p)==IC_PROCESSED then
196 elseif getsubtype(p)==2 then
197 p = node_next(node_next(p));
198 -- Note that another node_next will be executed outside this if-statement.
200 found_visible_node = true
201 find_first_char = false; last_char = nil
203 elseif pid==id_hlist then
204 if PACKED == get_attr_icflag(p) then
205 if find_first_char then
206 first_char = getlist(p); find_first_char = false
208 last_char = getlist(p); found_visible_node = true
210 if getfield(p, 'shift')==0 then
211 if check_box(getlist(p), nil) then found_visible_node = true end
213 find_first_char = false; last_char = nil
216 elseif pid==id_math then
217 if find_first_char then
218 first_char = p; find_first_char = false
220 last_char = p; found_visible_node = true
221 elseif not (pid==id_ins or pid==id_mark
222 or pid==id_adjust or pid==id_whatsit
223 or pid==id_penalty) then
224 found_visible_node = true
225 find_first_char = false; last_char = nil
229 return found_visible_node
232 function check_box_high(Nx, box_ptr, box_end)
233 first_char = nil; last_char = nil; find_first_char = true
234 if check_box(box_ptr, box_end) then
235 local first_char = first_char
237 if getid(first_char)==id_glyph then
238 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
239 set_np_xspc_jachar(Nx, first_char)
241 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
244 set_np_xspc_alchar(Nx, -1,first_char)
251 -------------------- Np の計算と情報取得
253 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
254 function (Np, lp, Nq)
255 if Np.nuc then return Np
257 return Np -- your code
260 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
261 function (stat, Nq, Np) return false end)
266 local function set_attr_icflag_processed(p)
267 if get_attr_icflag(p)<= ITALIC then
268 set_attr(p, attr_icflag, PROCESSED)
272 local function check_next_ickern(lp)
273 if getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
274 set_attr(lp, attr_icflag, IC_PROCESSED)
275 Np.last = lp; return node_next(lp)
277 Np.last = Np.nuc; return lp
281 local function calc_np_pbox(lp)
282 Np.first = Np.first or lp; Np.id = id_pbox
283 local lpa, nc = KINSOKU, nil
284 set_attr(lp, attr_icflag, get_attr_icflag(lp));
285 while lp and (lpa>=PACKED) and (lpa<BOXBDD) do
286 nc, lp = lp, node_next(lp); lpa = has_attr(lp, attr_icflag) or 0
287 -- get_attr_icflag() ではいけない!
290 return check_next_ickern(lp)
294 local calc_np_auxtable = {
295 [id_glyph] = function (lp)
296 Np.first, Np.nuc = (Np.first or lp), lp;
297 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
298 and id_jglyph or id_glyph
299 return true, check_next_ickern(node_next(lp));
301 [id_hlist] = function(lp)
302 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
303 set_attr(lp, attr_icflag, PROCESSED)
304 Np.id = (getfield(lp, 'shift')~=0) and id_box_like or id_hlist
305 return true, node_next(lp)
307 box_like = function(lp)
308 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
309 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
310 return true, node_next(lp);
313 set_attr(lp, attr_icflag, PROCESSED)
314 return false, node_next(lp)
316 [id_whatsit] = function(lp)
317 local lps = getsubtype(lp)
318 if lps==sid_user then
319 if getsubtype(lp, 'user_id')==luatexja.userid_table.IHB then
320 local lq = node_next(lp);
321 head = node_remove(head, lp); node_free(lp); ihb_flag = true
324 set_attr(lp, attr_icflag, PROCESSED)
325 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
328 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
329 return true, node_next(lp)
331 return false, node_next(lp)
335 -- we do special treatment for these whatsit nodes.
336 if lps == sid_start_link or lps == sid_start_thread then
338 elseif lps == sid_end_link or lps == sid_end_thread then
339 Np.first, Nq.last = nil, lp;
341 set_attr(lp, attr_icflag, PROCESSED)
342 return false, node_next(lp)
345 [id_math] = function(lp)
346 Np.first, Np.nuc = (Np.first or lp), lp;
347 set_attr(lp, attr_icflag, PROCESSED)
348 lp = node_end_of_math(lp)
349 set_attr(lp, attr_icflag, PROCESSED)
350 Np.last, Np.id = lp, id_math;
351 return true, node_next(lp);
353 discglue = function(lp)
354 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
355 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
356 return true, node_next(lp)
358 [id_kern] = function(lp)
359 Np.first = Np.first or lp
360 if getsubtype(lp)==2 then
361 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
362 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
363 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
364 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
365 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
366 return true, check_next_ickern(node_next(lp));
368 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
369 Np.last = lp; return true, node_next(lp)
372 [id_penalty] = function(lp)
373 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
374 return false, node_next(lp)
377 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
378 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
379 calc_np_auxtable[13] = calc_np_auxtable.box_like
380 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
381 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
382 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
383 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
384 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
388 -- We assume lp = node_next(Np.last)
389 Np, Nq, ihb_flag = Nq, Np, nil
390 -- We clear `predefined' entries of Np before pairs() loop,
391 -- because using only pairs() loop is slower.
392 Np.post, Np.pre, Np.xspc = nil, nil, nil
393 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
394 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
395 for k in pairs(Np) do Np[k] = nil end
397 for k = 1,#Bp do Bp[k] = nil end
399 local lpa = has_attr(lp, attr_icflag) or 0
402 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
403 local lq = node_next(lp)
404 head = node_remove(head, lp); node_free(lp); lp = lq
405 else return calc_np_pbox(lp)
408 k, lp = calc_np_auxtable[getid(lp)](lp)
409 if k then return lp end
416 local calc_np = calc_np
418 -- extract informations from Np
419 -- We think that "Np is a Japanese character" if Np.met~=nil,
420 -- "Np is an alphabetic character" if Np.pre~=nil,
421 -- "Np is not a character" otherwise.
422 local after_hlist, after_alchar, extract_np
424 local PRE = luatexja.stack_table_index.PRE
425 local POST = luatexja.stack_table_index.POST
426 local KCAT = luatexja.stack_table_index.KCAT
427 local XSP = luatexja.stack_table_index.XSP
430 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
431 local attr_orig_char = luatexbase.attributes['ltj@origchar']
432 local attr_autospc = luatexbase.attributes['ltj@autospc']
433 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
434 function set_np_xspc_jachar(Nx, x)
435 local m = ltjf_font_metric_table[getfont(x)]
436 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
437 Nx.met, Nx.char = m, c; Nx.class = cls;
438 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
439 Nx.pre = table_current_stack[PRE + c] or 0
440 Nx.post = table_current_stack[POST + c] or 0
441 Nx.xspc = table_current_stack[XSP + c] or 3
442 Nx.kcat = table_current_stack[KCAT + c] or 0
443 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
445 local set_np_xspc_jachar = set_np_xspc_jachar
448 local floor = math.floor
449 function set_np_xspc_alchar(Nx, c,x, lig)
451 local f = (lig ==1) and nullfunc or node_tail
452 local xc, xs = getfield(x, 'components'), getsubtype(x)
453 while xc and xs and xs%4>=2 do
454 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
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 extract_np = function ()
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, getchar(x), x, 1)
475 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), 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, getfield(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 after_hlist = function (Nx)
485 local s = Nx.last_char
487 if getid(s)==id_glyph then
488 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
489 set_np_xspc_jachar(Nx, s)
491 set_np_xspc_alchar(Nx, getchar(s), s, 2)
494 set_np_xspc_alchar(Nx, -1, s)
497 Nx.pre, Nx.met = nil, nil
501 after_alchar = function (Nx)
503 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
508 -------------------- 最下層の処理
510 -- change penalties (or create a new penalty, if needed)
511 local function handle_penalty_normal(post, pre, g)
512 local a = (pre or 0) + (post or 0)
514 if (a~=0 and not(g and getid(g)==id_kern)) then
515 local p = node_new(id_penalty)
516 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
517 setfield(p, 'penalty', a)
518 head = insert_before(head, Np.first, p)
520 set_attr(p, attr_icflag, KINSOKU)
522 else for _, v in pairs(Bp) do add_penalty(v,a) end
526 local function handle_penalty_always(post, pre, g)
527 local a = (pre or 0) + (post or 0)
529 if not (g and getid(g)==id_glue) then
530 local p = node_new(id_penalty)
531 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
532 setfield(p, 'penalty', a)
533 head = insert_before(head, Np.first, p)
535 set_attr(p, attr_icflag, KINSOKU)
537 else for _, v in pairs(Bp) do add_penalty(v,a) end
541 local function handle_penalty_suppress(post, pre, g)
542 local a = (pre or 0) + (post or 0)
544 if g and getid(g)==id_glue then
545 local p = node_new(id_penalty)
546 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
548 set_attr(p, attr_icflag, KINSOKU)
550 else for _, v in pairs(Bp) do add_penalty(v,a) end
554 -- 和文文字間の JFM glue を node 化
555 local function new_jfm_glue(m, bc, ac)
556 -- bc, ac: char classes
557 local g, d = m.char_type[bc][ac], 0
560 n,d = node_copy(g[2]), g[3]
562 local f = node_new(id_glue)
563 set_attr(f, attr_icflag, g[4])
564 setfield(f, 'spec', n)
571 -- Nq.last (kern w) .... (glue/kern g) Np.first
572 local function real_insert(g)
574 head = insert_before(head, Np.first, g)
580 -------------------- 和文文字間空白量の決定
585 local function get_kanjiskip_normal()
586 if Np.auto_kspc or Nq.auto_kspc then
587 return node_copy(kanji_skip)
589 local g = node_copy(zero_glue)
590 set_attr(g, attr_icflag, KANJI_SKIP)
595 local function get_kanjiskip_jfm()
597 if Np.auto_kspc or Nq.auto_kspc then
598 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
599 local gx = node_new(id_glue_spec);
600 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
601 local pm, qm = Np.met, Nq.met
602 local bk = qm.kanjiskip or {0, 0, 0}
603 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
604 setfield(gx, 'width', bk[1])
605 setfield(gx, 'stretch', bk[2])
606 setfield(gx, 'shrink', bk[3])
608 local ak = pm.kanjiskip or {0, 0, 0}
609 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
610 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
611 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
613 setfield(g, 'spec', gx)
615 g = node_copy(zero_glue)
617 set_attr(g, attr_icflag, KANJI_SKIP)
623 local bg_ag = 2*id_glue - id_glue
624 local bg_ak = 2*id_glue - id_kern
625 local bk_ag = 2*id_kern - id_glue
626 local bk_ak = 2*id_kern - id_kern
628 calc_ja_ja_aux = function (gb,ga, db, da)
629 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
630 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
631 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
632 and diffmet_rule ~= math.two_paverage then
633 rbb, rab, rba, raa = 1,0,0,1
637 gb = node_new(id_kern); setfield(gb, 'kern', 0)
640 ga = node_new(id_kern); setfield(ga, 'kern', 0)
643 local k = 2*getid(gb) - getid(ga)
645 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
647 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
648 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
649 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
650 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
651 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
652 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
655 elseif k == bk_ak then
657 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
658 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
661 elseif k == bk_ag then
662 local as = getfield(ga, 'spec')
663 -- gb: kern, ga: glue
664 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
665 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
666 ad = getfield(as, 'stretch')
667 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
668 ad = getfield(as, 'shrink')
669 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
673 local bs = getfield(gb, 'spec')
674 -- gb: glue, ga: kern
675 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
676 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
677 bd = getfield(bs, 'stretch')
678 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
679 bd = getfield(bs, 'shrink')
680 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
687 local function calc_ja_ja_glue()
688 if ihb_flag then return nil
690 local qm, pm = Nq.met, Np.met
691 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
692 return new_jfm_glue(qm, Nq.class, Np.class)
694 local npn, nqn = Np.nuc, Nq.nuc
695 local gb, db = new_jfm_glue(qm, Nq.class,
696 slow_find_char_class(has_attr(npn, attr_orig_char),
698 local ga, da = new_jfm_glue(pm,
699 slow_find_char_class(has_attr(nqn, attr_orig_char),
702 return calc_ja_ja_aux(gb, ga, db, da);
707 -------------------- 和欧文間空白量の決定
711 local function get_xkanjiskip_normal(Nn)
712 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
713 local f = node_copy(xkanji_skip)
716 local g = node_copy(zero_glue)
717 set_attr(g, attr_icflag, XKANJI_SKIP)
721 local function get_xkanjiskip_jfm(Nn)
723 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
724 g = node_new(id_glue)
725 local gx = node_new(id_glue_spec);
726 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
727 local bk = Nn.met.xkanjiskip or {0, 0, 0}
728 setfield(gx, 'width', bk[1])
729 setfield(gx, 'stretch', bk[2])
730 setfield(gx, 'shrink', bk[3])
731 setfield(g, 'spec', gx)
733 g = node_copy(zero_glue)
735 set_attr(g, attr_icflag, XKANJI_SKIP)
739 -------------------- 隣接した「塊」間の処理
741 local function get_OA_skip()
744 return new_jfm_glue(pm,
745 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
749 local function get_OB_skip()
752 return new_jfm_glue(qm, Nq.class,
753 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
758 -- (anything) .. jachar
759 local function handle_np_jachar(mode)
761 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
762 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
763 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
764 elseif Nq.met then -- qid==id_hlist
765 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
766 handle_penalty_normal(0, Np.pre, g); real_insert(g)
768 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
769 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
771 local g = get_OA_skip() -- O_A
772 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
773 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
774 else handle_penalty_always(0, Np.pre, g)
778 if mode and Np.kcat%2~=1 then
779 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
784 -- jachar .. (anything)
785 local function handle_nq_jachar()
787 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
788 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
790 local g = get_OB_skip() -- O_B
791 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
792 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
793 else handle_penalty_always(Nq.post, 0, g)
799 -- (anything) .. (和文文字で始まる hlist)
800 local function handle_np_ja_hlist()
802 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
803 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
804 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
805 elseif Nq.met then -- Nq.id==id_hlist
806 local g = get_kanjiskip() -- K
807 handle_penalty_suppress(0, 0, g); real_insert(g)
809 local g = get_xkanjiskip(Np) -- X
810 handle_penalty_suppress(0, 0, g); real_insert(g)
814 -- (和文文字で終わる hlist) .. (anything)
815 local function handle_nq_ja_hlist()
817 local g = get_xkanjiskip(Nq) -- X
818 handle_penalty_suppress(0, 0, g); real_insert(g)
823 -- Nq が前側のクラスタとなることによる修正
825 local adjust_nq_aux = {
826 [id_glyph] = function()
828 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
829 end, -- after_alchar(Nq)
830 [id_hlist] = function() after_hlist(Nq) end,
831 [id_pbox] = function() after_hlist(Nq) end,
832 [id_disc] = function() after_hlist(Nq) end,
833 [id_pbox_w] = function()
834 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
840 local x = adjust_nq_aux[Nq.id]
846 -------------------- 開始・終了時の処理
850 local JWP = luatexja.stack_table_index.JWP
851 local function handle_list_tail(mode)
854 -- the current list is to be line-breaked.
855 -- Insert \jcharwidowpenalty
856 Bp = widow_Bp; Np = widow_Np
858 handle_penalty_normal(0,
859 table_current_stack[JWP] or 0)
862 -- the current list is the contents of a hbox
863 local npi, pm = Np.id, Np.met
864 if npi == id_jglyph or (npi==id_pbox and pm) then
865 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
867 set_attr(g, attr_icflag, BOXBDD)
868 head = insert_after(head, Np.last, g)
875 local function handle_list_head(par_indented)
876 local npi, pm = Np.id, Np.met
877 if npi == id_jglyph or (npi==id_pbox and pm) then
879 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
881 set_attr(g, attr_icflag, BOXBDD)
882 if getid(g)==id_glue and #Bp==0 then
883 local h = node_new(id_penalty)
884 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
886 head = insert_before(head, Np.first, g)
893 -- return value: (the initial cursor lp), (last node)
894 local function init_var(mode)
895 -- 1073741823: max_dimen
896 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
897 table_current_stack = ltjs.table_current_stack
899 kanji_skip = node_new(id_glue)
900 setfield(kanji_skip, 'spec', skip_table_to_spec('kanjiskip'))
901 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
902 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
903 and get_kanjiskip_jfm or get_kanjiskip_normal
905 xkanji_skip = node_new(id_glue)
906 setfield(xkanji_skip, 'spec', skip_table_to_spec('xkanjiskip'))
907 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
908 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
909 and get_xkanjiskip_jfm or get_xkanjiskip_normal
912 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
913 first=nil, id=nil, last=nil, met=nil, nuc=nil,
914 post=nil, pre=nil, xspc=nil,
917 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
918 first=nil, id=nil, last=nil, met=nil, nuc=nil,
919 post=nil, pre=nil, xspc=nil,
922 -- the current list is to be line-breaked:
923 -- hbox from \parindent is skipped.
924 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
925 while lp and ((lpi==id_whatsit and lps~=sid_user)
926 or ((lpi==id_hlist) and (lps==3))) do
927 if (lpi==id_hlist) and (lps==3) then par_indented = 'parbdd' end
928 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
929 return lp, par_indented
930 -- return lp, node_tail(head), par_indented
932 -- the current list is the contents of a hbox:
933 return head, 'boxbdd'
937 local function cleanup(mode)
938 -- adjust attr_icflag for avoiding error
939 tex.setattribute('global', attr_icflag, 0)
940 node_free(kanji_skip); node_free(xkanji_skip)
942 local h = node_next(head)
943 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
945 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
951 set_attr(head, attr_icflag,
952 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
956 -------------------- 外部から呼ばれる関数
959 function main(ahead, mode)
960 if not ahead then return ahead end
962 local lp, par_indented = init_var(mode);
963 lp = calc_np(lp, last)
965 extract_np(); handle_list_head(par_indented)
967 return cleanup(mode, last)
973 local pid, pm = Np.id, Np.met
975 if pid == id_jglyph then
976 handle_np_jachar(mode)
978 if pid==id_hlist then handle_np_ja_hlist()
979 else handle_np_jachar() end
981 if Nq.id==id_hlist then handle_nq_ja_hlist()
982 else handle_nq_jachar() end
986 handle_list_tail(mode)
992 local IHB = luatexja.userid_table.IHB
993 local BPAR = luatexja.userid_table.BPAR
994 local node_prev = Dnode.getprev
995 local node_write = Dnode.write
998 function create_inhibitglue_node()
999 local tn = node_new(id_whatsit, sid_user)
1000 setfield(tn, 'user_id', IHB)
1001 setfield(tn, 'type', 100)
1002 setfield(tn, 'value', 1)
1006 -- Node for indicating beginning of a paragraph
1007 -- (for ltjsclasses)
1008 function create_beginpar_node()
1009 local tn = node_new(id_whatsit, sid_user)
1010 setfield(tn, 'user_id', BPAR)
1011 setfield(tn, 'type', 100)
1012 setfield(tn, 'value', 1)
1016 local function whatsit_callback(Np, lp, Nq)
1017 if Np and Np.nuc then return Np
1018 elseif Np and getfield(lp, 'user_id') == BPAR then
1019 Np.first = lp; Np.nuc = lp; Np.last = lp
1022 Np.pre = 0; Np.post = 0
1024 Np.auto_xspc = false
1029 local function whatsit_after_callback(s, Nq, Np)
1030 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1031 local x, y = node_prev(Nq.nuc), Nq.nuc
1032 Nq.first, Nq.nuc, Nq.last = x, x, x
1033 head = node_remove(head, y)
1039 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1040 "luatexja.beginpar.np_info", 1)
1041 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1042 "luatexja.beginpar.np_info_after", 1)