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('direction'); local ltjd = luatexja.direction
17 local Dnode = node.direct or node
19 local nullfunc = function(n) return n end
20 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
21 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
23 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
24 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
25 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
26 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
27 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
28 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
29 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
31 local has_attr = Dnode.has_attribute
32 local set_attr = Dnode.set_attribute
33 local insert_before = Dnode.insert_before
34 local insert_after = Dnode.insert_after
35 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
36 local round = tex.round
37 local ltjf_font_metric_table = ltjf.font_metric_table
38 local ltjf_find_char_class = ltjf.find_char_class
39 local node_new = Dnode.new
40 local node_copy = Dnode.copy
41 local node_remove = luatexja.Dnode_remove -- Dnode.remove
42 local node_tail = Dnode.tail
43 local node_free = Dnode.free
44 local node_end_of_math = Dnode.end_of_math
49 local id_glyph = node.id('glyph')
50 local id_hlist = node.id('hlist')
51 local id_vlist = node.id('vlist')
52 local id_rule = node.id('rule')
53 local id_ins = node.id('ins')
54 local id_mark = node.id('mark')
55 local id_adjust = node.id('adjust')
56 local id_disc = node.id('disc')
57 local id_whatsit = node.id('whatsit')
58 local id_math = node.id('math')
59 local id_glue = node.id('glue')
60 local id_kern = node.id('kern')
61 local id_penalty = node.id('penalty')
63 local id_glue_spec = node.id('glue_spec')
64 local id_jglyph = 512 -- Japanese character
65 local id_box_like = 256 -- vbox, shifted hbox
66 local id_pbox = 257 -- already processed nodes (by \unhbox)
67 local id_pbox_w = 258 -- cluster which consists of a whatsit
68 local sid_user = node.subtype('user_defined')
70 local sid_start_link = node.subtype('pdf_start_link')
71 local sid_start_thread = node.subtype('pdf_start_thread')
72 local sid_end_link = node.subtype('pdf_end_link')
73 local sid_end_thread = node.subtype('pdf_end_thread')
75 local ITALIC = luatexja.icflag_table.ITALIC
76 local PACKED = luatexja.icflag_table.PACKED
77 local KINSOKU = luatexja.icflag_table.KINSOKU
78 local FROM_JFM = luatexja.icflag_table.FROM_JFM
79 local PROCESSED = luatexja.icflag_table.PROCESSED
80 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
81 local BOXBDD = luatexja.icflag_table.BOXBDD
82 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
85 local table_current_stack
88 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
89 local attr_dir = luatexbase.attributes['ltj@dir']
90 local attr_icflag = luatexbase.attributes['ltj@icflag']
92 local function get_attr_icflag(p)
93 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
96 -------------------- Helper functions
98 local function copy_attr(new, old)
102 -- This function is called only for acquiring `special' characters.
103 local function fast_find_char_class(c,m)
104 return m.chars[c] or 0
108 local function slow_find_char_class(c, m, oc)
110 local cls = ltjf_find_char_class(oc, m)
111 if xc ~= oc and cls==0 then cls = ltjf_find_char_class(-xc, m) end
115 local zero_glue = node_new(id_glue)
116 spec_zero_glue = to_node(node_new(id_glue_spec))
117 -- must be public, since mentioned from other sources
118 local spec_zero_glue = to_direct(spec_zero_glue)
119 setfield(spec_zero_glue, 'width', 0)
120 setfield(spec_zero_glue, 'stretch', 0)
121 setfield(spec_zero_glue, 'shrink', 0)
122 setfield(spec_zero_glue, 'stretch_order', 0)
123 setfield(spec_zero_glue, 'shrink_order', 0)
124 setfield(zero_glue, 'spec', spec_zero_glue)
126 local function skip_table_to_spec(n)
127 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
128 setfield(g, 'width', st.width)
129 setfield(g, 'stretch', st.stretch)
130 setfield(g, 'shrink', st.shrink)
131 setfield(g, 'stretch_order', st.stretch_order)
132 setfield(g, 'shrink_order', st.shrink_order)
138 local function add_penalty(p,e)
139 local pp = getfield(p, 'penalty')
141 if e<=-10000 then pp = 0 end
142 elseif pp<=-10000 then
143 if e>=10000 then pp = 0 end
146 if pp>=10000 then setfield(p, 'penalty', 10000)
147 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
148 else setfield(p, 'penalty', pp) end
154 diffmet_rule = math.two_paverage
155 function math.two_add(a,b) return a+b end
156 function math.two_average(a,b) return (a+b)*0.5 end
157 function math.two_paverage(a,b) return (a+b)/2 end
158 function math.two_pleft(a,b) return a end
159 function math.two_pright(a,b) return b end
161 local head -- the head of current list
164 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
166 local ihb_flag -- JFM グルー挿入抑止用 flag
167 -- on: \inhibitglue 指定時,hlist の周囲
169 -------------------- hlist 内の文字の検索
171 local first_char, last_char, find_first_char
173 local function check_box(box_ptr, box_end)
174 local p = box_ptr; local found_visible_node = false
176 find_first_char = false; last_char = nil
179 while p and p~=box_end do
181 if pid==id_kern and getsubtype(p)==2 then
182 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
184 if pid==id_glyph then
186 if find_first_char then
187 first_char = p; find_first_char = false
189 last_char = p; found_visible_node = true; p=node_next(p)
190 if (not p) or p==box_end then
191 return found_visible_node
193 until getid(p)~=id_glyph
194 pid = getid(p) -- p must be non-nil
197 local pa = get_attr_icflag(p)
198 --if pa==IC_PROCESSED or pa == PACKED then
199 if pa==IC_PROCESSED then
201 elseif getsubtype(p)==2 then
202 p = node_next(node_next(p));
203 -- Note that another node_next will be executed outside this if-statement.
205 found_visible_node = true
206 find_first_char = false; last_char = nil
208 elseif pid==id_hlist then
209 if PACKED == get_attr_icflag(p) then
210 if find_first_char then
211 first_char = getlist(p); find_first_char = false
213 last_char = getlist(p); found_visible_node = true
215 if getfield(p, 'shift')==0 then
216 if check_box(getlist(p), nil) then found_visible_node = true end
218 find_first_char = false; last_char = nil
221 elseif pid==id_math then
222 if find_first_char then
223 first_char = p; find_first_char = false
225 last_char = p; found_visible_node = true
226 --elseif pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
227 elseif not (pid==id_ins or pid==id_mark
228 or pid==id_adjust or pid==id_whatsit
229 or pid==id_penalty) then
230 found_visible_node = true
231 find_first_char = false; last_char = nil
235 return found_visible_node
238 function check_box_high(Nx, box_ptr, box_end)
239 first_char = nil; last_char = nil; find_first_char = true
240 if check_box(box_ptr, box_end) then
241 local first_char = first_char
243 if getid(first_char)==id_glyph then
244 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
245 set_np_xspc_jachar(Nx, first_char)
247 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
250 set_np_xspc_alchar(Nx, -1,first_char)
257 -------------------- Np の計算と情報取得
259 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
260 function (Np, lp, Nq)
261 if Np.nuc then return Np
263 return Np -- your code
266 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
267 function (stat, Nq, Np) return false end)
272 local function set_attr_icflag_processed(p)
273 if get_attr_icflag(p)<= ITALIC then
274 set_attr(p, attr_icflag, PROCESSED)
278 local function check_next_ickern(lp)
279 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
280 set_attr(lp, attr_icflag, IC_PROCESSED)
281 Np.last = lp; return node_next(lp)
283 Np.last = Np.nuc; return lp
287 local function calc_np_pbox(lp, last)
288 Np.first = Np.first or lp; Np.id = id_pbox
289 local lpa, nc = KINSOKU, nil
290 set_attr(lp, attr_icflag, get_attr_icflag(lp));
291 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
292 nc, lp = lp, node_next(lp); lpa = lp and has_attr(lp, attr_icflag) or 0
293 -- get_attr_icflag() ではいけない!
296 return check_next_ickern(lp)
300 local calc_np_auxtable = {
301 [id_glyph] = function (lp)
302 Np.first, Np.nuc = (Np.first or lp), lp;
303 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
304 and id_jglyph or id_glyph
305 return true, check_next_ickern(node_next(lp));
307 [id_hlist] = function(lp)
309 head, lp, op, flag = ltjd.make_dir_node(head, lp, list_dir)
310 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
311 Np.id = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
314 box_like = function(lp)
316 head, lp, op = ltjd.make_dir_node(head, lp, list_dir)
317 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
322 set_attr(lp, attr_icflag, PROCESSED)
323 return false, node_next(lp)
325 [id_whatsit] = function(lp)
326 local lps = getsubtype(lp)
327 if lps==sid_user then
328 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
329 local lq = node_next(lp);
330 head = node_remove(head, lp); node_free(lp); ihb_flag = true
333 set_attr(lp, attr_icflag, PROCESSED)
334 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
337 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
338 return true, node_next(lp)
340 return false, node_next(lp)
344 -- we do special treatment for these whatsit nodes.
345 if lps == sid_start_link or lps == sid_start_thread then
347 elseif lps == sid_end_link or lps == sid_end_thread then
348 Np.first, Nq.last = nil, lp;
350 set_attr(lp, attr_icflag, PROCESSED)
351 return false, node_next(lp)
354 [id_math] = function(lp)
355 Np.first, Np.nuc = (Np.first or lp), lp;
356 set_attr(lp, attr_icflag, PROCESSED)
357 lp = node_end_of_math(lp)
358 set_attr(lp, attr_icflag, PROCESSED)
359 Np.last, Np.id = lp, id_math;
360 return true, node_next(lp);
362 discglue = function(lp)
363 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
364 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
365 return true, node_next(lp)
367 [id_kern] = function(lp)
368 Np.first = Np.first or lp
369 if getsubtype(lp)==2 then
370 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
371 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
372 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
373 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
374 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
375 return true, check_next_ickern(node_next(lp));
377 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
378 Np.last = lp; return true, node_next(lp)
381 [id_penalty] = function(lp)
382 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
383 return false, node_next(lp)
386 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
387 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
388 calc_np_auxtable[13] = calc_np_auxtable.box_like
389 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
390 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
391 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
392 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
393 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
395 function calc_np(lp, last)
397 -- We assume lp = node_next(Np.last)
398 Np, Nq, ihb_flag = Nq, Np, nil
399 -- We clear `predefined' entries of Np before pairs() loop,
400 -- because using only pairs() loop is slower.
401 Np.post, Np.pre, Np.xspc = nil, nil, nil
402 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
403 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
404 for k in pairs(Np) do Np[k] = nil end
406 for k = 1,#Bp do Bp[k] = nil end
408 local lpa = has_attr(lp, attr_icflag) or 0
411 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
412 local lq = node_next(lp)
413 head = node_remove(head, lp); node_free(lp); lp = lq
414 else return calc_np_pbox(lp, last)
417 k, lp = calc_np_auxtable[getid(lp)](lp)
418 if k then return lp end
425 local calc_np = calc_np
427 -- extract informations from Np
428 -- We think that "Np is a Japanese character" if Np.met~=nil,
429 -- "Np is an alphabetic character" if Np.pre~=nil,
430 -- "Np is not a character" otherwise.
431 after_hlist = nil -- global
432 local after_alchar, extract_np
434 local PRE = luatexja.stack_table_index.PRE
435 local POST = luatexja.stack_table_index.POST
436 local KCAT = luatexja.stack_table_index.KCAT
437 local XSP = luatexja.stack_table_index.XSP
440 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
441 local attr_orig_char = luatexbase.attributes['ltj@origchar']
442 local attr_autospc = luatexbase.attributes['ltj@autospc']
443 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
444 function set_np_xspc_jachar(Nx, x)
445 local m = ltjf_font_metric_table[getfont(x)]
447 if list_dir == dir_tate then
448 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
449 c = has_attr(x, attr_dir) or c1 or c2
450 cls = ltjf_find_char_class(c, m)
451 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
453 cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
455 Nx.met, Nx.char = m, c; Nx.class = cls;
456 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
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
460 Nx.kcat = table_current_stack[KCAT + c] or 0
461 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
463 local set_np_xspc_jachar = set_np_xspc_jachar
466 local floor = math.floor
467 function set_np_xspc_alchar(Nx, c,x, lig)
469 local f = (lig ==1) and nullfunc or node_tail
470 local xc, xs = getfield(x, 'components'), getsubtype(x)
471 while xc and xs and xs%4>=2 do
472 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
475 Nx.pre = table_current_stack[PRE + c] or 0
476 Nx.post = table_current_stack[POST + c] or 0
477 Nx.xspc = table_current_stack[XSP + c] or 3
480 Nx.pre, Nx.post, Nx.char = 0, 0, -1
481 Nx.xspc = table_current_stack[XSP - 1] or 3
484 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
486 local set_np_xspc_alchar = set_np_xspc_alchar
489 extract_np = function ()
490 local x, i = Np.nuc, Np.id;
491 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
492 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
493 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
494 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
495 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
496 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
500 -- change the information for the next loop
501 -- (will be done if Nx is an alphabetic character or a hlist)
502 after_hlist = function (Nx)
503 local s = Nx.last_char
505 if getid(s)==id_glyph then
506 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
507 set_np_xspc_jachar(Nx, s)
509 set_np_xspc_alchar(Nx, getchar(s), s, 2)
512 set_np_xspc_alchar(Nx, -1, s)
515 Nx.pre, Nx.met = nil, nil
519 after_alchar = function (Nx)
521 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
526 -------------------- 最下層の処理
528 -- change penalties (or create a new penalty, if needed)
529 local function handle_penalty_normal(post, pre, g)
530 local a = (pre or 0) + (post or 0)
532 if (a~=0 and not(g and getid(g)==id_kern)) then
533 local p = node_new(id_penalty)
534 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
535 setfield(p, 'penalty', a)
536 head = insert_before(head, Np.first, p)
538 set_attr(p, attr_icflag, KINSOKU)
540 else for _, v in pairs(Bp) do add_penalty(v,a) end
544 local function handle_penalty_always(post, pre, g)
545 local a = (pre or 0) + (post or 0)
547 if not (g and getid(g)==id_glue) then
548 local p = node_new(id_penalty)
549 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
550 setfield(p, 'penalty', a)
551 head = insert_before(head, Np.first, p)
553 set_attr(p, attr_icflag, KINSOKU)
555 else for _, v in pairs(Bp) do add_penalty(v,a) end
559 local function handle_penalty_suppress(post, pre, g)
560 local a = (pre or 0) + (post or 0)
562 if g and getid(g)==id_glue then
563 local p = node_new(id_penalty)
564 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
566 set_attr(p, attr_icflag, KINSOKU)
568 else for _, v in pairs(Bp) do add_penalty(v,a) end
572 -- 和文文字間の JFM glue を node 化
573 local function new_jfm_glue(m, bc, ac)
574 -- bc, ac: char classes
575 local g, d = m.char_type[bc][ac], 0
578 n,d = node_copy(g[2]), g[3]
580 local f = node_new(id_glue)
581 set_attr(f, attr_icflag, g[4])
582 setfield(f, 'spec', n)
589 -- Nq.last (kern w) .... (glue/kern g) Np.first
590 local function real_insert(g)
592 head = insert_before(head, Np.first, g)
598 -------------------- 和文文字間空白量の決定
602 local get_kanjiskip_normal, get_kanjiskip_jfm
604 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
605 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
606 get_kanjiskip_normal = function ()
607 if Np.auto_kspc or Nq.auto_kspc then
608 return node_copy(kanji_skip)
610 local g = node_copy(zero_glue)
611 set_attr(g, attr_icflag, KANJI_SKIP)
616 get_kanjiskip_jfm = function ()
618 if Np.auto_kspc or Nq.auto_kspc then
619 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
620 local gx = node_new(id_glue_spec);
621 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
622 local pm, qm = Np.met, Nq.met
623 local bk = qm.kanjiskip or {0, 0, 0}
624 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
625 setfield(gx, 'width', bk[1])
626 setfield(gx, 'stretch', bk[2])
627 setfield(gx, 'shrink', bk[3])
629 local ak = pm.kanjiskip or {0, 0, 0}
630 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
631 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
632 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
634 setfield(g, 'spec', gx)
636 g = node_copy(zero_glue)
638 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
645 local bg_ag = 2*id_glue - id_glue
646 local bg_ak = 2*id_glue - id_kern
647 local bk_ag = 2*id_kern - id_glue
648 local bk_ak = 2*id_kern - id_kern
650 calc_ja_ja_aux = function (gb,ga, db, da)
651 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
652 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
653 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
654 and diffmet_rule ~= math.two_paverage then
655 rbb, rab, rba, raa = 1,0,0,1
659 gb = node_new(id_kern); setfield(gb, 'kern', 0)
662 ga = node_new(id_kern); setfield(ga, 'kern', 0)
665 local k = 2*getid(gb) - getid(ga)
667 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
669 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
670 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
671 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
672 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
673 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
674 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
677 elseif k == bk_ak then
679 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
680 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
683 elseif k == bk_ag then
684 local as = getfield(ga, 'spec')
685 -- gb: kern, ga: glue
686 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
687 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
688 ad = getfield(as, 'stretch')
689 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
690 ad = getfield(as, 'shrink')
691 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
695 local bs = getfield(gb, 'spec')
696 -- gb: glue, ga: kern
697 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
698 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
699 bd = getfield(bs, 'stretch')
700 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
701 bd = getfield(bs, 'shrink')
702 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
709 local function calc_ja_ja_glue()
710 if ihb_flag then return nil
712 local qm, pm = Nq.met, Np.met
713 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
714 return new_jfm_glue(qm, Nq.class, Np.class)
716 local npn, nqn = Np.nuc, Nq.nuc
717 local gb, db = new_jfm_glue(qm, Nq.class,
718 slow_find_char_class(has_attr(npn, attr_orig_char),
720 local ga, da = new_jfm_glue(pm,
721 slow_find_char_class(has_attr(nqn, attr_orig_char),
724 return calc_ja_ja_aux(gb, ga, db, da);
729 -------------------- 和欧文間空白量の決定
733 local get_xkanjiskip_normal, get_xkanjiskip_jfm
735 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
736 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
737 get_xkanjiskip_normal = function (Nn)
738 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
739 local f = node_copy(xkanji_skip)
742 local g = node_copy(zero_glue)
743 set_attr(g, attr_icflag, XKANJI_SKIP)
747 get_xkanjiskip_jfm = function (Nn)
749 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
750 g = node_new(id_glue)
751 local gx = node_new(id_glue_spec);
752 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
753 local bk = Nn.met.xkanjiskip or {0, 0, 0}
754 setfield(gx, 'width', bk[1])
755 setfield(gx, 'stretch', bk[2])
756 setfield(gx, 'shrink', bk[3])
757 setfield(g, 'spec', gx)
759 g = node_copy(zero_glue)
761 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
766 -------------------- 隣接した「塊」間の処理
768 local function get_OA_skip()
771 return new_jfm_glue(pm,
772 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
776 local function get_OB_skip()
779 return new_jfm_glue(qm, Nq.class,
780 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
785 -- (anything) .. jachar
786 local function handle_np_jachar(mode)
788 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
789 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
790 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
791 elseif Nq.met then -- qid==id_hlist
792 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
793 handle_penalty_normal(0, Np.pre, g); real_insert(g)
795 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
796 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
798 local g = get_OA_skip() -- O_A
799 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
800 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
801 else handle_penalty_always(0, Np.pre, g)
805 if mode and Np.kcat%2~=1 then
806 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
811 -- jachar .. (anything)
812 local function handle_nq_jachar()
814 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
815 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
817 local g = get_OB_skip() -- O_B
818 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
819 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
820 else handle_penalty_always(Nq.post, 0, g)
826 -- (anything) .. (和文文字で始まる hlist)
827 local function handle_np_ja_hlist()
829 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
830 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
831 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
832 elseif Nq.met then -- Nq.id==id_hlist
833 local g = get_kanjiskip() -- K
834 handle_penalty_suppress(0, 0, g); real_insert(g)
836 local g = get_xkanjiskip(Np) -- X
837 handle_penalty_suppress(0, 0, g); real_insert(g)
841 -- (和文文字で終わる hlist) .. (anything)
842 local function handle_nq_ja_hlist()
844 local g = get_xkanjiskip(Nq) -- X
845 handle_penalty_suppress(0, 0, g); real_insert(g)
850 -- Nq が前側のクラスタとなることによる修正
852 local adjust_nq_aux = {
853 [id_glyph] = function()
855 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
856 end, -- after_alchar(Nq)
857 [id_hlist] = function() after_hlist(Nq) end,
858 [id_pbox] = function() after_hlist(Nq) end,
859 [id_disc] = function() after_hlist(Nq) end,
860 [id_pbox_w] = function()
861 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
867 local x = adjust_nq_aux[Nq.id]
873 -------------------- 開始・終了時の処理
877 local JWP = luatexja.stack_table_index.JWP
878 local function handle_list_tail(mode)
881 -- the current list is to be line-breaked.
882 -- Insert \jcharwidowpenalty
883 Bp = widow_Bp; Np = widow_Np
885 handle_penalty_normal(0,
886 table_current_stack[JWP] or 0)
889 -- the current list is the contents of a hbox
890 local npi, pm = Np.id, Np.met
891 if npi == id_jglyph or (npi==id_pbox and pm) then
892 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
894 set_attr(g, attr_icflag, BOXBDD)
895 head = insert_after(head, Np.last, g)
902 local function handle_list_head(par_indented)
903 local npi, pm = Np.id, Np.met
904 if npi == id_jglyph or (npi==id_pbox and pm) then
906 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
908 set_attr(g, attr_icflag, BOXBDD)
909 if getid(g)==id_glue and #Bp==0 then
910 local h = node_new(id_penalty)
911 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
913 head = insert_before(head, Np.first, g)
920 -- return value: (the initial cursor lp), (last node)
923 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
924 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
925 local KSK = luatexja.stack_table_index.KSK
926 local XSK = luatexja.stack_table_index.XSK
927 local DIR = luatexja.stack_table_index.DIR
928 init_var = function (mode)
929 -- 1073741823: max_dimen
930 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
931 table_current_stack = ltjs.table_current_stack
933 list_dir = table_current_stack[DIR] or dir_yoko
934 kanji_skip = node_new(id_glue)
935 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
936 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
937 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
938 and get_kanjiskip_jfm or get_kanjiskip_normal
940 xkanji_skip = node_new(id_glue)
941 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
942 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
943 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
944 and get_xkanjiskip_jfm or get_xkanjiskip_normal
947 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
948 first=nil, id=nil, last=nil, met=nil, nuc=nil,
949 post=nil, pre=nil, xspc=nil,
952 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
953 first=nil, id=nil, last=nil, met=nil, nuc=nil,
954 post=nil, pre=nil, xspc=nil,
957 -- the current list is to be line-breaked:
958 -- hbox from \parindent is skipped.
959 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
960 while lp and ((lpi==id_whatsit and lps~=sid_user)
961 or ((lpi==id_hlist) and (lps==3))) do
962 if (lpi==id_hlist) and (lps==3) then
963 Np.char, par_indented = 'parbdd', 'parbdd'
964 Np.width = getfield(lp, 'width')
966 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
967 return lp, node_tail(head), par_indented
969 return head, nil, 'boxbdd'
974 local function cleanup(mode)
975 -- adjust attr_icflag for avoiding error
976 tex.setattribute('global', attr_icflag, 0)
977 node_free(kanji_skip); node_free(xkanji_skip)
979 local h = node_next(head)
980 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
982 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
988 set_attr(head, attr_icflag,
989 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
993 -------------------- 外部から呼ばれる関数
996 function main(ahead, mode)
997 if not ahead then return ahead end
999 local lp, last, par_indented = init_var(mode)
1000 lp = calc_np(lp, last)
1002 extract_np(); handle_list_head(par_indented)
1004 return cleanup(mode)
1006 lp = calc_np(lp, last)
1010 local pid, pm = Np.id, Np.met
1012 if pid == id_jglyph then
1013 handle_np_jachar(mode)
1015 if pid==id_hlist then handle_np_ja_hlist()
1016 else handle_np_jachar() end
1018 if Nq.id==id_hlist then handle_nq_ja_hlist()
1019 else handle_nq_jachar() end
1021 lp = calc_np(lp, last)
1023 handle_list_tail(mode)
1024 return cleanup(mode)
1029 local IHB = luatexja.userid_table.IHB
1030 local BPAR = luatexja.userid_table.BPAR
1031 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1032 local node_write = Dnode.write
1035 function create_inhibitglue_node()
1036 local tn = node_new(id_whatsit, sid_user)
1037 setfield(tn, 'user_id', IHB)
1038 setfield(tn, 'type', 100)
1039 setfield(tn, 'value', 1)
1043 -- Node for indicating beginning of a paragraph
1044 -- (for ltjsclasses)
1045 function create_beginpar_node()
1046 local tn = node_new(id_whatsit, sid_user)
1047 setfield(tn, 'user_id', BPAR)
1048 setfield(tn, 'type', 100)
1049 setfield(tn, 'value', 1)
1053 local function whatsit_callback(Np, lp, Nq)
1054 if Np and Np.nuc then return Np
1055 elseif Np and getfield(lp, 'user_id') == BPAR then
1056 Np.first = lp; Np.nuc = lp; Np.last = lp
1059 Np.pre = 0; Np.post = 0
1061 Np.auto_xspc = false
1066 local function whatsit_after_callback(s, Nq, Np)
1067 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1068 local x, y = node_prev(Nq.nuc), Nq.nuc
1069 Nq.first, Nq.nuc, Nq.last = x, x, x
1070 head = node_remove(head, y)
1076 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1077 "luatexja.beginpar.np_info", 1)
1078 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1079 "luatexja.beginpar.np_info_after", 1)