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 ~= node) and Dnode.getnext or node.next
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 = luatexja.Dnode_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 PROCESSED = luatexja.icflag_table.PROCESSED
77 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
78 local BOXBDD = luatexja.icflag_table.BOXBDD
79 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
82 local table_current_stack
84 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
85 local attr_icflag = luatexbase.attributes['ltj@icflag']
87 local function get_attr_icflag(p)
88 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
91 -------------------- Helper functions
93 local function copy_attr(new, old)
97 -- This function is called only for acquiring `special' characters.
98 local function fast_find_char_class(c,m)
99 return m.chars[c] or 0
103 local function slow_find_char_class(c, m, oc)
105 local cls = ltjf_find_char_class(oc, m)
106 if xc ~= oc and cls==0 then cls = ltjf_find_char_class(-xc, m) end
110 local zero_glue = node_new(id_glue)
111 spec_zero_glue = to_node(node_new(id_glue_spec))
112 -- must be public, since mentioned from other sources
113 local spec_zero_glue = to_direct(spec_zero_glue)
114 setfield(spec_zero_glue, 'width', 0)
115 setfield(spec_zero_glue, 'stretch', 0)
116 setfield(spec_zero_glue, 'shrink', 0)
117 setfield(spec_zero_glue, 'stretch_order', 0)
118 setfield(spec_zero_glue, 'shrink_order', 0)
119 setfield(zero_glue, 'spec', spec_zero_glue)
121 local function skip_table_to_spec(n)
122 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
123 setfield(g, 'width', st.width)
124 setfield(g, 'stretch', st.stretch)
125 setfield(g, 'shrink', st.shrink)
126 setfield(g, 'stretch_order', st.stretch_order)
127 setfield(g, 'shrink_order', st.shrink_order)
133 local function add_penalty(p,e)
134 local pp = getfield(p, 'penalty')
136 if e<=-10000 then pp = 0 end
137 elseif pp<=-10000 then
138 if e>=10000 then pp = 0 end
141 if pp>=10000 then setfield(p, 'penalty', 10000)
142 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
143 else setfield(p, 'penalty', pp) end
149 diffmet_rule = math.two_paverage
150 function math.two_add(a,b) return a+b end
151 function math.two_average(a,b) return (a+b)*0.5 end
152 function math.two_paverage(a,b) return (a+b)/2 end
153 function math.two_pleft(a,b) return a end
154 function math.two_pright(a,b) return b end
156 local head -- the head of current list
159 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
161 local ihb_flag -- JFM グルー挿入抑止用 flag
162 -- on: \inhibitglue 指定時,hlist の周囲
164 -------------------- hlist 内の文字の検索
166 local first_char, last_char, find_first_char
168 local function check_box(box_ptr, box_end)
169 local p = box_ptr; local found_visible_node = false
171 find_first_char = false; last_char = nil
174 while p and p~=box_end do
176 if pid==id_kern and getsubtype(p)==2 then
177 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
179 if pid==id_glyph then
181 if find_first_char then
182 first_char = p; find_first_char = false
184 last_char = p; found_visible_node = true; p=node_next(p)
185 if (not p) or p==box_end then
186 return found_visible_node
188 until getid(p)~=id_glyph
189 pid = getid(p) -- p must be non-nil
192 local pa = get_attr_icflag(p)
193 --if pa==IC_PROCESSED or pa == PACKED then
194 if pa==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 pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
222 elseif not (pid==id_ins or pid==id_mark
223 or pid==id_adjust or pid==id_whatsit
224 or pid==id_penalty) then
225 found_visible_node = true
226 find_first_char = false; last_char = nil
230 return found_visible_node
233 function check_box_high(Nx, box_ptr, box_end)
234 first_char = nil; last_char = nil; find_first_char = true
235 if check_box(box_ptr, box_end) then
236 local first_char = first_char
238 if getid(first_char)==id_glyph then
239 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
240 set_np_xspc_jachar(Nx, first_char)
242 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
245 set_np_xspc_alchar(Nx, -1,first_char)
252 -------------------- Np の計算と情報取得
254 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
255 function (Np, lp, Nq)
256 if Np.nuc then return Np
258 return Np -- your code
261 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
262 function (stat, Nq, Np) return false end)
267 local function set_attr_icflag_processed(p)
268 if get_attr_icflag(p)<= ITALIC then
269 set_attr(p, attr_icflag, PROCESSED)
273 local function check_next_ickern(lp)
274 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
275 set_attr(lp, attr_icflag, IC_PROCESSED)
276 Np.last = lp; return node_next(lp)
278 Np.last = Np.nuc; return lp
282 local function calc_np_pbox(lp, last)
283 Np.first = Np.first or lp; Np.id = id_pbox
284 local lpa, nc = KINSOKU, nil
285 set_attr(lp, attr_icflag, get_attr_icflag(lp));
286 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
287 nc, lp = lp, node_next(lp); lpa = lp and has_attr(lp, attr_icflag) or 0
288 -- get_attr_icflag() ではいけない!
291 return check_next_ickern(lp)
295 local calc_np_auxtable = {
296 [id_glyph] = function (lp)
297 Np.first, Np.nuc = (Np.first or lp), lp;
298 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
299 and id_jglyph or id_glyph
300 return true, check_next_ickern(node_next(lp));
302 [id_hlist] = function(lp)
303 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
304 set_attr(lp, attr_icflag, PROCESSED)
305 Np.id = (getfield(lp, 'shift')~=0) and id_box_like or id_hlist
306 return true, node_next(lp)
308 box_like = function(lp)
309 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
310 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
311 return true, node_next(lp);
314 set_attr(lp, attr_icflag, PROCESSED)
315 return false, node_next(lp)
317 [id_whatsit] = function(lp)
318 local lps = getsubtype(lp)
319 if lps==sid_user then
320 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
321 local lq = node_next(lp);
322 head = node_remove(head, lp); node_free(lp); ihb_flag = true
325 set_attr(lp, attr_icflag, PROCESSED)
326 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
329 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
330 return true, node_next(lp)
332 return false, node_next(lp)
336 -- we do special treatment for these whatsit nodes.
337 if lps == sid_start_link or lps == sid_start_thread then
339 elseif lps == sid_end_link or lps == sid_end_thread then
340 Np.first, Nq.last = nil, lp;
342 set_attr(lp, attr_icflag, PROCESSED)
343 return false, node_next(lp)
346 [id_math] = function(lp)
347 Np.first, Np.nuc = (Np.first or lp), lp;
348 set_attr(lp, attr_icflag, PROCESSED)
349 lp = node_end_of_math(lp)
350 set_attr(lp, attr_icflag, PROCESSED)
351 Np.last, Np.id = lp, id_math;
352 return true, node_next(lp);
354 discglue = function(lp)
355 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
356 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
357 return true, node_next(lp)
359 [id_kern] = function(lp)
360 Np.first = Np.first or lp
361 if getsubtype(lp)==2 then
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); lp = node_next(lp)
365 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
366 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
367 return true, check_next_ickern(node_next(lp));
369 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
370 Np.last = lp; return true, node_next(lp)
373 [id_penalty] = function(lp)
374 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
375 return false, node_next(lp)
378 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
379 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
380 calc_np_auxtable[13] = calc_np_auxtable.box_like
381 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
382 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
383 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
384 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
385 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
387 function calc_np(lp, last)
389 -- We assume lp = node_next(Np.last)
390 Np, Nq, ihb_flag = Nq, Np, nil
391 -- We clear `predefined' entries of Np before pairs() loop,
392 -- because using only pairs() loop is slower.
393 Np.post, Np.pre, Np.xspc = nil, nil, nil
394 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
395 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
396 for k in pairs(Np) do Np[k] = nil end
398 for k = 1,#Bp do Bp[k] = nil end
400 local lpa = has_attr(lp, attr_icflag) or 0
403 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
404 local lq = node_next(lp)
405 head = node_remove(head, lp); node_free(lp); lp = lq
406 else return calc_np_pbox(lp, last)
409 k, lp = calc_np_auxtable[getid(lp)](lp)
410 if k then return lp end
417 local calc_np = calc_np
419 -- extract informations from Np
420 -- We think that "Np is a Japanese character" if Np.met~=nil,
421 -- "Np is an alphabetic character" if Np.pre~=nil,
422 -- "Np is not a character" otherwise.
423 after_hlist = nil -- global
424 local after_alchar, extract_np
426 local PRE = luatexja.stack_table_index.PRE
427 local POST = luatexja.stack_table_index.POST
428 local KCAT = luatexja.stack_table_index.KCAT
429 local XSP = luatexja.stack_table_index.XSP
432 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
433 local attr_orig_char = luatexbase.attributes['ltj@origchar']
434 local attr_autospc = luatexbase.attributes['ltj@autospc']
435 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
436 function set_np_xspc_jachar(Nx, x)
437 local m = ltjf_font_metric_table[getfont(x)]
438 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
439 Nx.met, Nx.char = m, c; Nx.class = cls;
440 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
441 Nx.pre = table_current_stack[PRE + c] or 0
442 Nx.post = table_current_stack[POST + c] or 0
443 Nx.xspc = table_current_stack[XSP + c] or 3
444 Nx.kcat = table_current_stack[KCAT + c] or 0
445 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
447 local set_np_xspc_jachar = set_np_xspc_jachar
450 local floor = math.floor
451 function set_np_xspc_alchar(Nx, c,x, lig)
453 local f = (lig ==1) and nullfunc or node_tail
454 local xc, xs = getfield(x, 'components'), getsubtype(x)
455 while xc and xs and xs%4>=2 do
456 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
459 Nx.pre = table_current_stack[PRE + c] or 0
460 Nx.post = table_current_stack[POST + c] or 0
461 Nx.xspc = table_current_stack[XSP + c] or 3
464 Nx.pre, Nx.post, Nx.char = 0, 0, -1
465 Nx.xspc = table_current_stack[XSP - 1] or 3
468 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
470 local set_np_xspc_alchar = set_np_xspc_alchar
473 extract_np = function ()
474 local x, i = Np.nuc, Np.id;
475 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
476 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
477 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
478 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
479 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
480 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
484 -- change the information for the next loop
485 -- (will be done if Nx is an alphabetic character or a hlist)
486 after_hlist = function (Nx)
487 local s = Nx.last_char
489 if getid(s)==id_glyph then
490 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
491 set_np_xspc_jachar(Nx, s)
493 set_np_xspc_alchar(Nx, getchar(s), s, 2)
496 set_np_xspc_alchar(Nx, -1, s)
499 Nx.pre, Nx.met = nil, nil
503 after_alchar = function (Nx)
505 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
510 -------------------- 最下層の処理
512 -- change penalties (or create a new penalty, if needed)
513 local function handle_penalty_normal(post, pre, g)
514 local a = (pre or 0) + (post or 0)
516 if (a~=0 and not(g and getid(g)==id_kern)) then
517 local p = node_new(id_penalty)
518 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
519 setfield(p, 'penalty', a)
520 head = insert_before(head, Np.first, p)
522 set_attr(p, attr_icflag, KINSOKU)
524 else for _, v in pairs(Bp) do add_penalty(v,a) end
528 local function handle_penalty_always(post, pre, g)
529 local a = (pre or 0) + (post or 0)
531 if not (g and getid(g)==id_glue) then
532 local p = node_new(id_penalty)
533 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
534 setfield(p, 'penalty', a)
535 head = insert_before(head, Np.first, p)
537 set_attr(p, attr_icflag, KINSOKU)
539 else for _, v in pairs(Bp) do add_penalty(v,a) end
543 local function handle_penalty_suppress(post, pre, g)
544 local a = (pre or 0) + (post or 0)
546 if g and getid(g)==id_glue then
547 local p = node_new(id_penalty)
548 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
550 set_attr(p, attr_icflag, KINSOKU)
552 else for _, v in pairs(Bp) do add_penalty(v,a) end
556 -- 和文文字間の JFM glue を node 化
557 local function new_jfm_glue(m, bc, ac)
558 -- bc, ac: char classes
559 local g, d = m.char_type[bc][ac], 0
562 n,d = node_copy(g[2]), g[3]
564 local f = node_new(id_glue)
565 set_attr(f, attr_icflag, g[4])
566 setfield(f, 'spec', n)
573 -- Nq.last (kern w) .... (glue/kern g) Np.first
574 local function real_insert(g)
576 head = insert_before(head, Np.first, g)
582 -------------------- 和文文字間空白量の決定
586 local get_kanjiskip_normal, get_kanjiskip_jfm
588 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
589 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
590 get_kanjiskip_normal = function ()
591 if Np.auto_kspc or Nq.auto_kspc then
592 return node_copy(kanji_skip)
594 local g = node_copy(zero_glue)
595 set_attr(g, attr_icflag, KANJI_SKIP)
600 get_kanjiskip_jfm = function ()
602 if Np.auto_kspc or Nq.auto_kspc then
603 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
604 local gx = node_new(id_glue_spec);
605 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
606 local pm, qm = Np.met, Nq.met
607 local bk = qm.kanjiskip or {0, 0, 0}
608 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
609 setfield(gx, 'width', bk[1])
610 setfield(gx, 'stretch', bk[2])
611 setfield(gx, 'shrink', bk[3])
613 local ak = pm.kanjiskip or {0, 0, 0}
614 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
615 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
616 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
618 setfield(g, 'spec', gx)
620 g = node_copy(zero_glue)
622 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
629 local bg_ag = 2*id_glue - id_glue
630 local bg_ak = 2*id_glue - id_kern
631 local bk_ag = 2*id_kern - id_glue
632 local bk_ak = 2*id_kern - id_kern
634 calc_ja_ja_aux = function (gb,ga, db, da)
635 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
636 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
637 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
638 and diffmet_rule ~= math.two_paverage then
639 rbb, rab, rba, raa = 1,0,0,1
643 gb = node_new(id_kern); setfield(gb, 'kern', 0)
646 ga = node_new(id_kern); setfield(ga, 'kern', 0)
649 local k = 2*getid(gb) - getid(ga)
651 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
653 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
654 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
655 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
656 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
657 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
658 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
661 elseif k == bk_ak then
663 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
664 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
667 elseif k == bk_ag then
668 local as = getfield(ga, 'spec')
669 -- gb: kern, ga: glue
670 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
671 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
672 ad = getfield(as, 'stretch')
673 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
674 ad = getfield(as, 'shrink')
675 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
679 local bs = getfield(gb, 'spec')
680 -- gb: glue, ga: kern
681 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
682 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
683 bd = getfield(bs, 'stretch')
684 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
685 bd = getfield(bs, 'shrink')
686 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
693 local function calc_ja_ja_glue()
694 if ihb_flag then return nil
696 local qm, pm = Nq.met, Np.met
697 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
698 return new_jfm_glue(qm, Nq.class, Np.class)
700 local npn, nqn = Np.nuc, Nq.nuc
701 local gb, db = new_jfm_glue(qm, Nq.class,
702 slow_find_char_class(has_attr(npn, attr_orig_char),
704 local ga, da = new_jfm_glue(pm,
705 slow_find_char_class(has_attr(nqn, attr_orig_char),
708 return calc_ja_ja_aux(gb, ga, db, da);
713 -------------------- 和欧文間空白量の決定
717 local get_xkanjiskip_normal, get_xkanjiskip_jfm
719 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
720 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
721 get_xkanjiskip_normal = function (Nn)
722 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
723 local f = node_copy(xkanji_skip)
726 local g = node_copy(zero_glue)
727 set_attr(g, attr_icflag, XKANJI_SKIP)
731 get_xkanjiskip_jfm = function (Nn)
733 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
734 g = node_new(id_glue)
735 local gx = node_new(id_glue_spec);
736 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
737 local bk = Nn.met.xkanjiskip or {0, 0, 0}
738 setfield(gx, 'width', bk[1])
739 setfield(gx, 'stretch', bk[2])
740 setfield(gx, 'shrink', bk[3])
741 setfield(g, 'spec', gx)
743 g = node_copy(zero_glue)
745 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
750 -------------------- 隣接した「塊」間の処理
752 local function get_OA_skip()
755 return new_jfm_glue(pm,
756 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
760 local function get_OB_skip()
763 return new_jfm_glue(qm, Nq.class,
764 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
769 -- (anything) .. jachar
770 local function handle_np_jachar(mode)
772 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
773 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
774 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
775 elseif Nq.met then -- qid==id_hlist
776 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
777 handle_penalty_normal(0, Np.pre, g); real_insert(g)
779 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
780 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
782 local g = get_OA_skip() -- O_A
783 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
784 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
785 else handle_penalty_always(0, Np.pre, g)
789 if mode and Np.kcat%2~=1 then
790 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
795 -- jachar .. (anything)
796 local function handle_nq_jachar()
798 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
799 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
801 local g = get_OB_skip() -- O_B
802 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
803 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
804 else handle_penalty_always(Nq.post, 0, g)
810 -- (anything) .. (和文文字で始まる hlist)
811 local function handle_np_ja_hlist()
813 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
814 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
815 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
816 elseif Nq.met then -- Nq.id==id_hlist
817 local g = get_kanjiskip() -- K
818 handle_penalty_suppress(0, 0, g); real_insert(g)
820 local g = get_xkanjiskip(Np) -- X
821 handle_penalty_suppress(0, 0, g); real_insert(g)
825 -- (和文文字で終わる hlist) .. (anything)
826 local function handle_nq_ja_hlist()
828 local g = get_xkanjiskip(Nq) -- X
829 handle_penalty_suppress(0, 0, g); real_insert(g)
834 -- Nq が前側のクラスタとなることによる修正
836 local adjust_nq_aux = {
837 [id_glyph] = function()
839 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
840 end, -- after_alchar(Nq)
841 [id_hlist] = function() after_hlist(Nq) end,
842 [id_pbox] = function() after_hlist(Nq) end,
843 [id_disc] = function() after_hlist(Nq) end,
844 [id_pbox_w] = function()
845 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
851 local x = adjust_nq_aux[Nq.id]
857 -------------------- 開始・終了時の処理
861 local JWP = luatexja.stack_table_index.JWP
862 local function handle_list_tail(mode)
865 -- the current list is to be line-breaked.
866 -- Insert \jcharwidowpenalty
867 Bp = widow_Bp; Np = widow_Np
869 handle_penalty_normal(0,
870 table_current_stack[JWP] or 0)
873 -- the current list is the contents of a hbox
874 local npi, pm = Np.id, Np.met
875 if npi == id_jglyph or (npi==id_pbox and pm) then
876 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
878 set_attr(g, attr_icflag, BOXBDD)
879 head = insert_after(head, Np.last, g)
886 local function handle_list_head(par_indented)
887 local npi, pm = Np.id, Np.met
888 if npi == id_jglyph or (npi==id_pbox and pm) then
890 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
892 set_attr(g, attr_icflag, BOXBDD)
893 if getid(g)==id_glue and #Bp==0 then
894 local h = node_new(id_penalty)
895 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
897 head = insert_before(head, Np.first, g)
904 -- return value: (the initial cursor lp), (last node)
907 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
908 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
909 local KSK = luatexja.stack_table_index.KSK
910 local XSK = luatexja.stack_table_index.XSK
911 init_var = function (mode)
912 -- 1073741823: max_dimen
913 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
914 table_current_stack = ltjs.table_current_stack
916 kanji_skip = node_new(id_glue)
917 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
918 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
919 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
920 and get_kanjiskip_jfm or get_kanjiskip_normal
922 xkanji_skip = node_new(id_glue)
923 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
924 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
925 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
926 and get_xkanjiskip_jfm or get_xkanjiskip_normal
929 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
930 first=nil, id=nil, last=nil, met=nil, nuc=nil,
931 post=nil, pre=nil, xspc=nil,
934 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
935 first=nil, id=nil, last=nil, met=nil, nuc=nil,
936 post=nil, pre=nil, xspc=nil,
939 -- the current list is to be line-breaked:
940 -- hbox from \parindent is skipped.
941 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
942 while lp and ((lpi==id_whatsit and lps~=sid_user)
943 or ((lpi==id_hlist) and (lps==3))) do
944 if (lpi==id_hlist) and (lps==3) then
945 Np.char, par_indented = 'parbdd', 'parbdd'
946 Np.width = getfield(lp, 'width')
948 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
949 return lp, node_tail(head), par_indented
951 return head, nil, 'boxbdd'
956 local function cleanup(mode)
957 -- adjust attr_icflag for avoiding error
958 tex.setattribute('global', attr_icflag, 0)
959 node_free(kanji_skip); node_free(xkanji_skip)
961 local h = node_next(head)
962 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
964 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
970 set_attr(head, attr_icflag,
971 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
975 -------------------- 外部から呼ばれる関数
978 function main(ahead, mode)
979 if not ahead then return ahead end
981 local lp, last, par_indented = init_var(mode)
982 lp = calc_np(lp, last)
984 extract_np(); handle_list_head(par_indented)
988 lp = calc_np(lp, last)
992 local pid, pm = Np.id, Np.met
994 if pid == id_jglyph then
995 handle_np_jachar(mode)
997 if pid==id_hlist then handle_np_ja_hlist()
998 else handle_np_jachar() end
1000 if Nq.id==id_hlist then handle_nq_ja_hlist()
1001 else handle_nq_jachar() end
1003 lp = calc_np(lp, last)
1005 handle_list_tail(mode)
1006 return cleanup(mode)
1011 local IHB = luatexja.userid_table.IHB
1012 local BPAR = luatexja.userid_table.BPAR
1013 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1014 local node_write = Dnode.write
1017 function create_inhibitglue_node()
1018 local tn = node_new(id_whatsit, sid_user)
1019 setfield(tn, 'user_id', IHB)
1020 setfield(tn, 'type', 100)
1021 setfield(tn, 'value', 1)
1025 -- Node for indicating beginning of a paragraph
1026 -- (for ltjsclasses)
1027 function create_beginpar_node()
1028 local tn = node_new(id_whatsit, sid_user)
1029 setfield(tn, 'user_id', BPAR)
1030 setfield(tn, 'type', 100)
1031 setfield(tn, 'value', 1)
1035 local function whatsit_callback(Np, lp, Nq)
1036 if Np and Np.nuc then return Np
1037 elseif Np and getfield(lp, 'user_id') == BPAR then
1038 Np.first = lp; Np.nuc = lp; Np.last = lp
1041 Np.pre = 0; Np.post = 0
1043 Np.auto_xspc = false
1048 local function whatsit_after_callback(s, Nq, Np)
1049 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1050 local x, y = node_prev(Nq.nuc), Nq.nuc
1051 Nq.first, Nq.nuc, Nq.last = x, x, x
1052 head = node_remove(head, y)
1058 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1059 "luatexja.beginpar.np_info", 1)
1060 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1061 "luatexja.beginpar.np_info_after", 1)