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 ltjd_make_dir_node = ltjd.make_dir_node
38 local ltjf_font_metric_table = ltjf.font_metric_table
39 local ltjf_find_char_class = ltjf.find_char_class
40 local node_new = Dnode.new
41 local node_copy = Dnode.copy
42 local node_remove = luatexja.Dnode_remove -- Dnode.remove
43 local node_tail = Dnode.tail
44 local node_free = Dnode.free
45 local node_end_of_math = Dnode.end_of_math
50 local id_glyph = node.id('glyph')
51 local id_hlist = node.id('hlist')
52 local id_vlist = node.id('vlist')
53 local id_rule = node.id('rule')
54 local id_ins = node.id('ins')
55 local id_mark = node.id('mark')
56 local id_adjust = node.id('adjust')
57 local id_disc = node.id('disc')
58 local id_whatsit = node.id('whatsit')
59 local id_math = node.id('math')
60 local id_glue = node.id('glue')
61 local id_kern = node.id('kern')
62 local id_penalty = node.id('penalty')
64 local id_glue_spec = node.id('glue_spec')
65 local id_jglyph = 512 -- Japanese character
66 local id_box_like = 256 -- vbox, shifted hbox
67 local id_pbox = 257 -- already processed nodes (by \unhbox)
68 local id_pbox_w = 258 -- cluster which consists of a whatsit
69 local sid_user = node.subtype('user_defined')
71 local sid_start_link = node.subtype('pdf_start_link')
72 local sid_start_thread = node.subtype('pdf_start_thread')
73 local sid_end_link = node.subtype('pdf_end_link')
74 local sid_end_thread = node.subtype('pdf_end_thread')
76 local ITALIC = luatexja.icflag_table.ITALIC
77 local PACKED = luatexja.icflag_table.PACKED
78 local KINSOKU = luatexja.icflag_table.KINSOKU
79 local FROM_JFM = luatexja.icflag_table.FROM_JFM
80 local PROCESSED = luatexja.icflag_table.PROCESSED
81 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
82 local BOXBDD = luatexja.icflag_table.BOXBDD
83 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
86 local table_current_stack
89 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
90 local attr_dir = luatexbase.attributes['ltj@dir']
91 local attr_icflag = luatexbase.attributes['ltj@icflag']
93 local function get_attr_icflag(p)
94 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
97 -------------------- Helper functions
99 local function copy_attr(new, old)
100 -- 仕様が決まるまで off にしておく
103 -- This function is called only for acquiring `special' characters.
104 local function fast_find_char_class(c,m)
105 return m.chars[c] or 0
109 local function slow_find_char_class(c, m, oc)
111 local cls = ltjf_find_char_class(oc, m)
112 if xc ~= oc and cls==0 then cls = ltjf_find_char_class(-xc, m) end
116 local zero_glue = node_new(id_glue)
117 spec_zero_glue = to_node(node_new(id_glue_spec))
118 -- must be public, since mentioned from other sources
119 local spec_zero_glue = to_direct(spec_zero_glue)
120 setfield(spec_zero_glue, 'width', 0)
121 setfield(spec_zero_glue, 'stretch', 0)
122 setfield(spec_zero_glue, 'shrink', 0)
123 setfield(spec_zero_glue, 'stretch_order', 0)
124 setfield(spec_zero_glue, 'shrink_order', 0)
125 setfield(zero_glue, 'spec', spec_zero_glue)
127 local function skip_table_to_spec(n)
128 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
129 setfield(g, 'width', st.width)
130 setfield(g, 'stretch', st.stretch)
131 setfield(g, 'shrink', st.shrink)
132 setfield(g, 'stretch_order', st.stretch_order)
133 setfield(g, 'shrink_order', st.shrink_order)
139 local function add_penalty(p,e)
140 local pp = getfield(p, 'penalty')
142 if e<=-10000 then pp = 0 end
143 elseif pp<=-10000 then
144 if e>=10000 then pp = 0 end
147 if pp>=10000 then setfield(p, 'penalty', 10000)
148 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
149 else setfield(p, 'penalty', pp) end
155 diffmet_rule = math.two_paverage
156 function math.two_add(a,b) return a+b end
157 function math.two_average(a,b) return (a+b)*0.5 end
158 function math.two_paverage(a,b) return (a+b)/2 end
159 function math.two_pleft(a,b) return a end
160 function math.two_pright(a,b) return b end
162 local head -- the head of current list
165 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
167 local ihb_flag -- JFM グルー挿入抑止用 flag
168 -- on: \inhibitglue 指定時,hlist の周囲
170 -------------------- hlist 内の文字の検索
172 local first_char, last_char, find_first_char
174 local function check_box(box_ptr, box_end)
175 local p = box_ptr; local found_visible_node = false
177 find_first_char = false; last_char = nil
180 while p and p~=box_end do
182 if pid==id_kern and getsubtype(p)==2 then
183 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
185 if pid==id_glyph then
187 if find_first_char then
188 first_char = p; find_first_char = false
190 last_char = p; found_visible_node = true; p=node_next(p)
191 if (not p) or p==box_end then
192 return found_visible_node
194 until getid(p)~=id_glyph
195 pid = getid(p) -- p must be non-nil
198 local pa = get_attr_icflag(p)
199 --if pa==IC_PROCESSED or pa == PACKED then
200 if pa==IC_PROCESSED then
202 elseif getsubtype(p)==2 then
203 p = node_next(node_next(p));
204 -- Note that another node_next will be executed outside this if-statement.
206 found_visible_node = true
207 find_first_char = false; last_char = nil
209 elseif pid==id_hlist then
210 if PACKED == get_attr_icflag(p) then
211 if find_first_char then
212 first_char = getlist(p); find_first_char = false
214 last_char = getlist(p); found_visible_node = true
216 if getfield(p, 'shift')==0 then
217 if check_box(getlist(p), nil) then found_visible_node = true end
219 find_first_char = false; last_char = nil
222 elseif pid==id_math then
223 if find_first_char then
224 first_char = p; find_first_char = false
226 last_char = p; found_visible_node = true
227 --elseif pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
228 elseif not (pid==id_ins or pid==id_mark
229 or pid==id_adjust or pid==id_whatsit
230 or pid==id_penalty) then
231 found_visible_node = true
232 find_first_char = false; last_char = nil
236 return found_visible_node
239 function check_box_high(Nx, box_ptr, box_end)
240 first_char = nil; last_char = nil; find_first_char = true
241 if check_box(box_ptr, box_end) then
242 local first_char = first_char
244 if getid(first_char)==id_glyph then
245 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
246 set_np_xspc_jachar(Nx, first_char)
248 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
251 set_np_xspc_alchar(Nx, -1,first_char)
258 -------------------- Np の計算と情報取得
260 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
261 function (Np, lp, Nq)
262 if Np.nuc then return Np
264 return Np -- your code
267 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
268 function (stat, Nq, Np) return false end)
273 local function set_attr_icflag_processed(p)
274 if get_attr_icflag(p)<= ITALIC then
275 set_attr(p, attr_icflag, PROCESSED)
279 local function check_next_ickern(lp)
280 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
281 set_attr(lp, attr_icflag, IC_PROCESSED)
282 Np.last = lp; return node_next(lp)
284 Np.last = Np.nuc; return lp
288 local function calc_np_pbox(lp, last)
289 Np.first = Np.first or lp; Np.id = id_pbox
290 local lpa, nc = KINSOKU, nil
291 set_attr(lp, attr_icflag, get_attr_icflag(lp));
292 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
293 nc, lp = lp, node_next(lp); lpa = lp and has_attr(lp, attr_icflag) or 0
294 -- get_attr_icflag() ではいけない!
297 return check_next_ickern(lp)
301 local calc_np_auxtable = {
302 [id_glyph] = function (lp)
303 Np.first, Np.nuc = (Np.first or lp), lp;
304 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
305 and id_jglyph or id_glyph
306 return true, check_next_ickern(node_next(lp));
308 [id_hlist] = function(lp)
310 head, lp, op, flag = ltjd_make_dir_node(head, lp, list_dir, 'jfm hlist')
311 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
312 Np.id = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
315 box_like = function(lp)
317 head, lp, op = ltjd_make_dir_node(head, lp, list_dir, 'jfm:' .. getid(lp))
318 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
323 set_attr(lp, attr_icflag, PROCESSED)
324 return false, node_next(lp)
326 [id_whatsit] = function(lp)
327 local lps = getsubtype(lp)
328 if lps==sid_user then
329 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
330 local lq = node_next(lp);
331 head = node_remove(head, lp); node_free(lp); ihb_flag = true
334 set_attr(lp, attr_icflag, PROCESSED)
335 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
338 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
339 return true, node_next(lp)
341 return false, node_next(lp)
345 -- we do special treatment for these whatsit nodes.
346 if lps == sid_start_link or lps == sid_start_thread then
348 elseif lps == sid_end_link or lps == sid_end_thread then
349 Np.first, Nq.last = nil, lp;
351 set_attr(lp, attr_icflag, PROCESSED)
352 return false, node_next(lp)
355 [id_math] = function(lp)
356 Np.first, Np.nuc = (Np.first or lp), lp;
357 set_attr(lp, attr_icflag, PROCESSED)
358 lp = node_end_of_math(lp)
359 set_attr(lp, attr_icflag, PROCESSED)
360 Np.last, Np.id = lp, id_math;
361 return true, node_next(lp);
363 discglue = function(lp)
364 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
365 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
366 return true, node_next(lp)
368 [id_kern] = function(lp)
369 Np.first = Np.first or lp
370 if getsubtype(lp)==2 then
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); lp = node_next(lp)
374 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
375 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
376 return true, check_next_ickern(node_next(lp));
378 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
379 Np.last = lp; return true, node_next(lp)
382 [id_penalty] = function(lp)
383 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
384 return false, node_next(lp)
387 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
388 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
389 calc_np_auxtable[13] = calc_np_auxtable.box_like
390 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
391 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
392 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
393 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
394 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
396 function calc_np(lp, last)
398 -- We assume lp = node_next(Np.last)
399 Np, Nq, ihb_flag = Nq, Np, nil
400 -- We clear `predefined' entries of Np before pairs() loop,
401 -- because using only pairs() loop is slower.
402 Np.post, Np.pre, Np.xspc = nil, nil, nil
403 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
404 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
405 for k in pairs(Np) do Np[k] = nil end
407 for k = 1,#Bp do Bp[k] = nil end
409 local lpa = has_attr(lp, attr_icflag) or 0
412 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
413 local lq = node_next(lp)
414 head = node_remove(head, lp); node_free(lp); lp = lq
415 else return calc_np_pbox(lp, last)
418 k, lp = calc_np_auxtable[getid(lp)](lp)
419 if k then return lp end
426 local calc_np = calc_np
428 -- extract informations from Np
429 -- We think that "Np is a Japanese character" if Np.met~=nil,
430 -- "Np is an alphabetic character" if Np.pre~=nil,
431 -- "Np is not a character" otherwise.
432 after_hlist = nil -- global
433 local after_alchar, extract_np
435 local PRE = luatexja.stack_table_index.PRE
436 local POST = luatexja.stack_table_index.POST
437 local KCAT = luatexja.stack_table_index.KCAT
438 local XSP = luatexja.stack_table_index.XSP
441 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
442 local attr_orig_char = luatexbase.attributes['ltj@origchar']
443 local attr_autospc = luatexbase.attributes['ltj@autospc']
444 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
445 function set_np_xspc_jachar(Nx, x)
446 local m = ltjf_font_metric_table[getfont(x)]
448 if list_dir == dir_tate then
449 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
450 c = has_attr(x, attr_dir) or c1 or c2
451 cls = ltjf_find_char_class(c, m)
452 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
454 cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
456 Nx.met, Nx.char = m, c; Nx.class = cls;
457 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
458 Nx.pre = table_current_stack[PRE + c] or 0
459 Nx.post = table_current_stack[POST + c] or 0
460 Nx.xspc = table_current_stack[XSP + c] or 3
461 Nx.kcat = table_current_stack[KCAT + c] or 0
462 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
464 local set_np_xspc_jachar = set_np_xspc_jachar
467 local floor = math.floor
468 function set_np_xspc_alchar(Nx, c,x, lig)
470 local f = (lig ==1) and nullfunc or node_tail
471 local xc, xs = getfield(x, 'components'), getsubtype(x)
472 while xc and xs and xs%4>=2 do
473 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
476 Nx.pre = table_current_stack[PRE + c] or 0
477 Nx.post = table_current_stack[POST + c] or 0
478 Nx.xspc = table_current_stack[XSP + c] or 3
481 Nx.pre, Nx.post, Nx.char = 0, 0, -1
482 Nx.xspc = table_current_stack[XSP - 1] or 3
485 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
487 local set_np_xspc_alchar = set_np_xspc_alchar
490 extract_np = function ()
491 local x, i = Np.nuc, Np.id;
492 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
493 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
494 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
495 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
496 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
497 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
501 -- change the information for the next loop
502 -- (will be done if Nx is an alphabetic character or a hlist)
503 after_hlist = function (Nx)
504 local s = Nx.last_char
506 if getid(s)==id_glyph then
507 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
508 set_np_xspc_jachar(Nx, s)
510 set_np_xspc_alchar(Nx, getchar(s), s, 2)
513 set_np_xspc_alchar(Nx, -1, s)
516 Nx.pre, Nx.met = nil, nil
520 after_alchar = function (Nx)
522 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
527 -------------------- 最下層の処理
529 -- change penalties (or create a new penalty, if needed)
530 local function handle_penalty_normal(post, pre, g)
531 local a = (pre or 0) + (post or 0)
533 if (a~=0 and not(g and getid(g)==id_kern)) then
534 local p = node_new(id_penalty)
535 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
536 setfield(p, 'penalty', a)
537 head = insert_before(head, Np.first, p)
539 set_attr(p, attr_icflag, KINSOKU)
541 else for _, v in pairs(Bp) do add_penalty(v,a) end
545 local function handle_penalty_always(post, pre, g)
546 local a = (pre or 0) + (post or 0)
548 if not (g and getid(g)==id_glue) then
549 local p = node_new(id_penalty)
550 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
551 setfield(p, 'penalty', a)
552 head = insert_before(head, Np.first, p)
554 set_attr(p, attr_icflag, KINSOKU)
556 else for _, v in pairs(Bp) do add_penalty(v,a) end
560 local function handle_penalty_suppress(post, pre, g)
561 local a = (pre or 0) + (post or 0)
563 if g and getid(g)==id_glue then
564 local p = node_new(id_penalty)
565 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
567 set_attr(p, attr_icflag, KINSOKU)
569 else for _, v in pairs(Bp) do add_penalty(v,a) end
573 -- 和文文字間の JFM glue を node 化
574 local function new_jfm_glue(m, bc, ac)
575 -- bc, ac: char classes
576 local g, d = m.char_type[bc][ac], 0
579 n,d = node_copy(g[2]), g[3]
581 local f = node_new(id_glue)
582 set_attr(f, attr_icflag, g[4])
583 setfield(f, 'spec', n)
590 -- Nq.last (kern w) .... (glue/kern g) Np.first
591 local function real_insert(g)
593 head = insert_before(head, Np.first, g)
599 -------------------- 和文文字間空白量の決定
603 local get_kanjiskip_normal, get_kanjiskip_jfm
605 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
606 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
607 get_kanjiskip_normal = function ()
608 if Np.auto_kspc or Nq.auto_kspc then
609 return node_copy(kanji_skip)
611 local g = node_copy(zero_glue)
612 set_attr(g, attr_icflag, KANJI_SKIP)
617 get_kanjiskip_jfm = function ()
619 if Np.auto_kspc or Nq.auto_kspc then
620 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
621 local gx = node_new(id_glue_spec);
622 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
623 local pm, qm = Np.met, Nq.met
624 local bk = qm.kanjiskip or {0, 0, 0}
625 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
626 setfield(gx, 'width', bk[1])
627 setfield(gx, 'stretch', bk[2])
628 setfield(gx, 'shrink', bk[3])
630 local ak = pm.kanjiskip or {0, 0, 0}
631 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
632 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
633 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
635 setfield(g, 'spec', gx)
637 g = node_copy(zero_glue)
639 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
646 local bg_ag = 2*id_glue - id_glue
647 local bg_ak = 2*id_glue - id_kern
648 local bk_ag = 2*id_kern - id_glue
649 local bk_ak = 2*id_kern - id_kern
651 calc_ja_ja_aux = function (gb,ga, db, da)
652 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
653 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
654 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
655 and diffmet_rule ~= math.two_paverage then
656 rbb, rab, rba, raa = 1,0,0,1
660 gb = node_new(id_kern); setfield(gb, 'kern', 0)
663 ga = node_new(id_kern); setfield(ga, 'kern', 0)
666 local k = 2*getid(gb) - getid(ga)
668 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
670 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
671 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
672 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
673 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
674 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
675 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
678 elseif k == bk_ak then
680 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
681 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
684 elseif k == bk_ag then
685 local as = getfield(ga, 'spec')
686 -- gb: kern, ga: glue
687 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
688 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
689 ad = getfield(as, 'stretch')
690 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
691 ad = getfield(as, 'shrink')
692 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
696 local bs = getfield(gb, 'spec')
697 -- gb: glue, ga: kern
698 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
699 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
700 bd = getfield(bs, 'stretch')
701 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
702 bd = getfield(bs, 'shrink')
703 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
710 local function calc_ja_ja_glue()
711 if ihb_flag then return nil
713 local qm, pm = Nq.met, Np.met
714 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
715 return new_jfm_glue(qm, Nq.class, Np.class)
717 local npn, nqn = Np.nuc, Nq.nuc
718 local gb, db = new_jfm_glue(qm, Nq.class,
719 slow_find_char_class(has_attr(npn, attr_orig_char),
721 local ga, da = new_jfm_glue(pm,
722 slow_find_char_class(has_attr(nqn, attr_orig_char),
725 return calc_ja_ja_aux(gb, ga, db, da);
730 -------------------- 和欧文間空白量の決定
734 local get_xkanjiskip_normal, get_xkanjiskip_jfm
736 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
737 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
738 get_xkanjiskip_normal = function (Nn)
739 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
740 local f = node_copy(xkanji_skip)
743 local g = node_copy(zero_glue)
744 set_attr(g, attr_icflag, XKANJI_SKIP)
748 get_xkanjiskip_jfm = function (Nn)
750 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
751 g = node_new(id_glue)
752 local gx = node_new(id_glue_spec);
753 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
754 local bk = Nn.met.xkanjiskip or {0, 0, 0}
755 setfield(gx, 'width', bk[1])
756 setfield(gx, 'stretch', bk[2])
757 setfield(gx, 'shrink', bk[3])
758 setfield(g, 'spec', gx)
760 g = node_copy(zero_glue)
762 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
767 -------------------- 隣接した「塊」間の処理
769 local function get_OA_skip()
772 return new_jfm_glue(pm,
773 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
777 local function get_OB_skip()
780 return new_jfm_glue(qm, Nq.class,
781 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
786 -- (anything) .. jachar
787 local function handle_np_jachar(mode)
789 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
790 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
791 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
792 elseif Nq.met then -- qid==id_hlist
793 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
794 handle_penalty_normal(0, Np.pre, g); real_insert(g)
796 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
797 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
799 local g = get_OA_skip() -- O_A
800 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
801 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
802 else handle_penalty_always(0, Np.pre, g)
806 if mode and Np.kcat%2~=1 then
807 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
812 -- jachar .. (anything)
813 local function handle_nq_jachar()
815 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
816 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
818 local g = get_OB_skip() -- O_B
819 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
820 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
821 else handle_penalty_always(Nq.post, 0, g)
827 -- (anything) .. (和文文字で始まる hlist)
828 local function handle_np_ja_hlist()
830 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
831 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
832 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
833 elseif Nq.met then -- Nq.id==id_hlist
834 local g = get_kanjiskip() -- K
835 handle_penalty_suppress(0, 0, g); real_insert(g)
837 local g = get_xkanjiskip(Np) -- X
838 handle_penalty_suppress(0, 0, g); real_insert(g)
842 -- (和文文字で終わる hlist) .. (anything)
843 local function handle_nq_ja_hlist()
845 local g = get_xkanjiskip(Nq) -- X
846 handle_penalty_suppress(0, 0, g); real_insert(g)
851 -- Nq が前側のクラスタとなることによる修正
853 local adjust_nq_aux = {
854 [id_glyph] = function()
856 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
857 end, -- after_alchar(Nq)
858 [id_hlist] = function() after_hlist(Nq) end,
859 [id_pbox] = function() after_hlist(Nq) end,
860 [id_disc] = function() after_hlist(Nq) end,
861 [id_pbox_w] = function()
862 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
868 local x = adjust_nq_aux[Nq.id]
874 -------------------- 開始・終了時の処理
878 local JWP = luatexja.stack_table_index.JWP
879 local function handle_list_tail(mode)
882 -- the current list is to be line-breaked.
883 -- Insert \jcharwidowpenalty
884 Bp = widow_Bp; Np = widow_Np
886 handle_penalty_normal(0,
887 table_current_stack[JWP] or 0)
890 -- the current list is the contents of a hbox
891 local npi, pm = Np.id, Np.met
892 if npi == id_jglyph or (npi==id_pbox and pm) then
893 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
895 set_attr(g, attr_icflag, BOXBDD)
896 head = insert_after(head, Np.last, g)
903 local function handle_list_head(par_indented)
904 local npi, pm = Np.id, Np.met
905 if npi == id_jglyph or (npi==id_pbox and pm) then
907 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
909 set_attr(g, attr_icflag, BOXBDD)
910 if getid(g)==id_glue and #Bp==0 then
911 local h = node_new(id_penalty)
912 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
914 head = insert_before(head, Np.first, g)
921 -- return value: (the initial cursor lp), (last node)
924 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
925 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
926 local KSK = luatexja.stack_table_index.KSK
927 local XSK = luatexja.stack_table_index.XSK
928 local DIR = luatexja.stack_table_index.DIR
929 init_var = function (mode)
930 -- 1073741823: max_dimen
931 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
932 table_current_stack = ltjs.table_current_stack
934 list_dir = table_current_stack[DIR] or dir_yoko
935 kanji_skip = node_new(id_glue)
936 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
937 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
938 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
939 and get_kanjiskip_jfm or get_kanjiskip_normal
941 xkanji_skip = node_new(id_glue)
942 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
943 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
944 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
945 and get_xkanjiskip_jfm or get_xkanjiskip_normal
948 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
949 first=nil, id=nil, last=nil, met=nil, nuc=nil,
950 post=nil, pre=nil, xspc=nil,
953 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
954 first=nil, id=nil, last=nil, met=nil, nuc=nil,
955 post=nil, pre=nil, xspc=nil,
958 -- the current list is to be line-breaked:
959 -- hbox from \parindent is skipped.
960 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
961 while lp and ((lpi==id_whatsit and lps~=sid_user)
962 or ((lpi==id_hlist) and (lps==3))) do
963 if (lpi==id_hlist) and (lps==3) then
964 Np.char, par_indented = 'parbdd', 'parbdd'
965 Np.width = getfield(lp, 'width')
967 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
968 return lp, node_tail(head), par_indented
970 return head, nil, 'boxbdd'
975 local function cleanup(mode)
976 -- adjust attr_icflag for avoiding error
977 tex.setattribute('global', attr_icflag, 0)
978 node_free(kanji_skip); node_free(xkanji_skip)
980 local h = node_next(head)
981 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
983 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
989 set_attr(head, attr_icflag,
990 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
994 -------------------- 外部から呼ばれる関数
997 function main(ahead, mode)
998 if not ahead then return ahead end
1000 local lp, last, par_indented = init_var(mode)
1001 lp = calc_np(lp, last)
1003 extract_np(); handle_list_head(par_indented)
1005 return cleanup(mode)
1007 lp = calc_np(lp, last)
1011 local pid, pm = Np.id, Np.met
1013 if pid == id_jglyph then
1014 handle_np_jachar(mode)
1016 if pid==id_hlist then handle_np_ja_hlist()
1017 else handle_np_jachar() end
1019 if Nq.id==id_hlist then handle_nq_ja_hlist()
1020 else handle_nq_jachar() end
1022 lp = calc_np(lp, last)
1024 handle_list_tail(mode)
1025 return cleanup(mode)
1030 local IHB = luatexja.userid_table.IHB
1031 local BPAR = luatexja.userid_table.BPAR
1032 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1033 local node_write = Dnode.write
1036 function create_inhibitglue_node()
1037 local tn = node_new(id_whatsit, sid_user)
1038 setfield(tn, 'user_id', IHB)
1039 setfield(tn, 'type', 100)
1040 setfield(tn, 'value', 1)
1044 -- Node for indicating beginning of a paragraph
1045 -- (for ltjsclasses)
1046 function create_beginpar_node()
1047 local tn = node_new(id_whatsit, sid_user)
1048 setfield(tn, 'user_id', BPAR)
1049 setfield(tn, 'type', 100)
1050 setfield(tn, 'value', 1)
1054 local function whatsit_callback(Np, lp, Nq)
1055 if Np and Np.nuc then return Np
1056 elseif Np and getfield(lp, 'user_id') == BPAR then
1057 Np.first = lp; Np.nuc = lp; Np.last = lp
1060 Np.pre = 0; Np.post = 0
1062 Np.auto_xspc = false
1067 local function whatsit_after_callback(s, Nq, Np)
1068 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1069 local x, y = node_prev(Nq.nuc), Nq.nuc
1070 Nq.first, Nq.nuc, Nq.last = x, x, x
1071 head = node_remove(head, y)
1077 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1078 "luatexja.beginpar.np_info", 1)
1079 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1080 "luatexja.beginpar.np_info_after", 1)