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('base'); local ltjb = luatexja.base
13 luatexja.load_module('stack'); local ltjs = luatexja.stack
14 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
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
47 local id_glyph = node.id('glyph')
48 local id_hlist = node.id('hlist')
49 local id_vlist = node.id('vlist')
50 local id_rule = node.id('rule')
51 local id_ins = node.id('ins')
52 local id_mark = node.id('mark')
53 local id_adjust = node.id('adjust')
54 local id_disc = node.id('disc')
55 local id_whatsit = node.id('whatsit')
56 local id_math = node.id('math')
57 local id_glue = node.id('glue')
58 local id_kern = node.id('kern')
59 local id_penalty = node.id('penalty')
61 local id_glue_spec = node.id('glue_spec')
62 local id_jglyph = 512 -- Japanese character
63 local id_box_like = 256 -- vbox, shifted hbox
64 local id_pbox = 257 -- already processed nodes (by \unhbox)
65 local id_pbox_w = 258 -- cluster which consists of a whatsit
66 local sid_user = node.subtype('user_defined')
68 local sid_start_link = node.subtype('pdf_start_link')
69 local sid_start_thread = node.subtype('pdf_start_thread')
70 local sid_end_link = node.subtype('pdf_end_link')
71 local sid_end_thread = node.subtype('pdf_end_thread')
73 local ITALIC = luatexja.icflag_table.ITALIC
74 local PACKED = luatexja.icflag_table.PACKED
75 local KINSOKU = luatexja.icflag_table.KINSOKU
76 local FROM_JFM = luatexja.icflag_table.FROM_JFM
77 local PROCESSED = luatexja.icflag_table.PROCESSED
78 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
79 local BOXBDD = luatexja.icflag_table.BOXBDD
80 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
83 local table_current_stack
85 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
86 local attr_icflag = luatexbase.attributes['ltj@icflag']
88 local function get_attr_icflag(p)
89 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
92 -------------------- Helper functions
94 local function copy_attr(new, old)
98 -- This function is called only for acquiring `special' characters.
99 local function fast_find_char_class(c,m)
100 return m.chars[c] or 0
104 local slow_find_char_class
106 slow_find_char_class = function (c, m, oc)
107 local cls = ltjf_find_char_class(oc, m)
108 if not c and cls==0 then
109 return ltjf_find_char_class(-c, m), oc
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)
309 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
310 set_attr(lp, attr_icflag, PROCESSED)
311 Np.id = (getfield(lp, 'shift')~=0) and id_box_like or id_hlist
312 return true, node_next(lp)
314 box_like = function(lp)
315 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
316 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
317 return true, node_next(lp);
320 set_attr(lp, attr_icflag, PROCESSED)
321 return false, node_next(lp)
323 [id_whatsit] = function(lp)
324 local lps = getsubtype(lp)
325 if lps==sid_user then
326 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
327 local lq = node_next(lp);
328 head = node_remove(head, lp); node_free(lp); ihb_flag = true
331 set_attr(lp, attr_icflag, PROCESSED)
332 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
335 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
336 return true, node_next(lp)
338 return false, node_next(lp)
342 -- we do special treatment for these whatsit nodes.
343 if lps == sid_start_link or lps == sid_start_thread then
345 elseif lps == sid_end_link or lps == sid_end_thread then
346 Np.first, Nq.last = nil, lp;
348 set_attr(lp, attr_icflag, PROCESSED)
349 return false, node_next(lp)
352 [id_math] = function(lp)
353 Np.first, Np.nuc = (Np.first or lp), lp;
354 set_attr(lp, attr_icflag, PROCESSED)
355 lp = node_end_of_math(lp)
356 set_attr(lp, attr_icflag, PROCESSED)
357 Np.last, Np.id = lp, id_math;
358 return true, node_next(lp);
360 discglue = function(lp)
361 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
362 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
363 return true, node_next(lp)
365 [id_kern] = function(lp)
366 Np.first = Np.first or lp
367 if getsubtype(lp)==2 then
368 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
369 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
370 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
371 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
372 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
373 return true, check_next_ickern(node_next(lp));
375 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
376 Np.last = lp; return true, node_next(lp)
379 [id_penalty] = function(lp)
380 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
381 return false, node_next(lp)
384 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
385 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
386 calc_np_auxtable[13] = calc_np_auxtable.box_like
387 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
388 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
389 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
390 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
391 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
393 function calc_np(lp, last)
395 -- We assume lp = node_next(Np.last)
396 Np, Nq, ihb_flag = Nq, Np, nil
397 -- We clear `predefined' entries of Np before pairs() loop,
398 -- because using only pairs() loop is slower.
399 Np.post, Np.pre, Np.xspc = nil, nil, nil
400 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
401 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
402 for k in pairs(Np) do Np[k] = nil end
404 for k = 1,#Bp do Bp[k] = nil end
406 local lpa = has_attr(lp, attr_icflag) or 0
409 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
410 local lq = node_next(lp)
411 head = node_remove(head, lp); node_free(lp); lp = lq
412 else return calc_np_pbox(lp, last)
415 k, lp = calc_np_auxtable[getid(lp)](lp)
416 if k then return lp end
423 local calc_np = calc_np
425 -- extract informations from Np
426 -- We think that "Np is a Japanese character" if Np.met~=nil,
427 -- "Np is an alphabetic character" if Np.pre~=nil,
428 -- "Np is not a character" otherwise.
429 after_hlist = nil -- global
430 local after_alchar, extract_np
432 local PRE = luatexja.stack_table_index.PRE
433 local POST = luatexja.stack_table_index.POST
434 local KCAT = luatexja.stack_table_index.KCAT
435 local XSP = luatexja.stack_table_index.XSP
438 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
439 local attr_orig_char = luatexbase.attributes['ltj@origchar']
440 local attr_autospc = luatexbase.attributes['ltj@autospc']
441 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
442 function set_np_xspc_jachar(Nx, x)
443 local m = ltjf_font_metric_table[getfont(x)]
444 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
445 Nx.met, Nx.char = m, c; Nx.class = cls;
446 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
447 Nx.pre = table_current_stack[PRE + c] or 0
448 Nx.post = table_current_stack[POST + c] or 0
449 Nx.xspc = table_current_stack[XSP + c] or 3
450 Nx.kcat = table_current_stack[KCAT + c] or 0
451 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
453 local set_np_xspc_jachar = set_np_xspc_jachar
456 local floor = math.floor
457 function set_np_xspc_alchar(Nx, c,x, lig)
459 local f = (lig ==1) and nullfunc or node_tail
460 local xc, xs = getfield(x, 'components'), getsubtype(x)
461 while xc and xs and xs%4>=2 do
462 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
465 Nx.pre = table_current_stack[PRE + c] or 0
466 Nx.post = table_current_stack[POST + c] or 0
467 Nx.xspc = table_current_stack[XSP + c] or 3
470 Nx.pre, Nx.post, Nx.char = 0, 0, -1
471 Nx.xspc = table_current_stack[XSP - 1] or 3
474 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
476 local set_np_xspc_alchar = set_np_xspc_alchar
479 extract_np = function ()
480 local x, i = Np.nuc, Np.id;
481 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
482 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
483 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
484 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
485 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
486 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
490 -- change the information for the next loop
491 -- (will be done if Nx is an alphabetic character or a hlist)
492 after_hlist = function (Nx)
493 local s = Nx.last_char
495 if getid(s)==id_glyph then
496 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
497 set_np_xspc_jachar(Nx, s)
499 set_np_xspc_alchar(Nx, getchar(s), s, 2)
502 set_np_xspc_alchar(Nx, -1, s)
505 Nx.pre, Nx.met = nil, nil
509 after_alchar = function (Nx)
511 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
516 -------------------- 最下層の処理
518 -- change penalties (or create a new penalty, if needed)
519 local function handle_penalty_normal(post, pre, g)
520 local a = (pre or 0) + (post or 0)
522 if (a~=0 and not(g and getid(g)==id_kern)) then
523 local p = node_new(id_penalty)
524 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
525 setfield(p, 'penalty', a)
526 head = insert_before(head, Np.first, p)
528 set_attr(p, attr_icflag, KINSOKU)
530 else for _, v in pairs(Bp) do add_penalty(v,a) end
534 local function handle_penalty_always(post, pre, g)
535 local a = (pre or 0) + (post or 0)
537 if not (g and getid(g)==id_glue) or a~=0 then
538 local p = node_new(id_penalty)
539 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
540 setfield(p, 'penalty', a)
541 head = insert_before(head, Np.first, p)
543 set_attr(p, attr_icflag, KINSOKU)
545 else for _, v in pairs(Bp) do add_penalty(v,a) end
549 local function handle_penalty_suppress(post, pre, g)
550 local a = (pre or 0) + (post or 0)
552 if g and getid(g)==id_glue then
553 local p = node_new(id_penalty)
554 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
556 set_attr(p, attr_icflag, KINSOKU)
558 else for _, v in pairs(Bp) do add_penalty(v,a) end
562 -- 和文文字間の JFM glue を node 化
563 local function new_jfm_glue(m, bc, ac)
564 -- bc, ac: char classes
565 local g, d = m.char_type[bc][ac], 0
568 n,d = node_copy(g[2]), g[3]
570 local f = node_new(id_glue)
571 set_attr(f, attr_icflag, g[4])
572 setfield(f, 'spec', n)
579 -- Nq.last (kern w) .... (glue/kern g) Np.first
580 local function real_insert(g)
582 head = insert_before(head, Np.first, g)
588 -------------------- 和文文字間空白量の決定
592 local get_kanjiskip_normal, get_kanjiskip_jfm
594 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
595 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
596 get_kanjiskip_normal = function ()
597 if Np.auto_kspc or Nq.auto_kspc then
598 return node_copy(kanji_skip)
600 local g = node_copy(zero_glue)
601 set_attr(g, attr_icflag, KANJI_SKIP)
606 get_kanjiskip_jfm = function ()
608 if Np.auto_kspc or Nq.auto_kspc then
609 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
610 local gx = node_new(id_glue_spec);
611 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
612 local pm, qm = Np.met, Nq.met
613 local bk = qm.kanjiskip or {0, 0, 0}
614 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
615 setfield(gx, 'width', bk[1])
616 setfield(gx, 'stretch', bk[2])
617 setfield(gx, 'shrink', bk[3])
619 local ak = pm.kanjiskip or {0, 0, 0}
620 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
621 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
622 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
624 setfield(g, 'spec', gx)
626 g = node_copy(zero_glue)
628 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
635 local bg_ag = 2*id_glue - id_glue
636 local bg_ak = 2*id_glue - id_kern
637 local bk_ag = 2*id_kern - id_glue
638 local bk_ak = 2*id_kern - id_kern
640 calc_ja_ja_aux = function (gb,ga, db, da)
641 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
642 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
643 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
644 and diffmet_rule ~= math.two_paverage then
645 rbb, rab, rba, raa = 1,0,0,1
649 gb = node_new(id_kern); setfield(gb, 'kern', 0)
652 ga = node_new(id_kern); setfield(ga, 'kern', 0)
655 local k = 2*getid(gb) - getid(ga)
657 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
659 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
660 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
661 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
662 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
663 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
664 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
667 elseif k == bk_ak then
669 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
670 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
673 elseif k == bk_ag then
674 local as = getfield(ga, 'spec')
675 -- gb: kern, ga: glue
676 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
677 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
678 ad = getfield(as, 'stretch')
679 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
680 ad = getfield(as, 'shrink')
681 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
685 local bs = getfield(gb, 'spec')
686 -- gb: glue, ga: kern
687 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
688 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
689 bd = getfield(bs, 'stretch')
690 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
691 bd = getfield(bs, 'shrink')
692 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
699 local function calc_ja_ja_glue()
700 if ihb_flag then return nil
702 local qm, pm = Nq.met, Np.met
703 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
704 return new_jfm_glue(qm, Nq.class, Np.class)
706 local npn, nqn = Np.nuc, Nq.nuc
707 local gb, db = new_jfm_glue(qm, Nq.class,
708 slow_find_char_class(has_attr(npn, attr_orig_char),
710 local ga, da = new_jfm_glue(pm,
711 slow_find_char_class(has_attr(nqn, attr_orig_char),
714 return calc_ja_ja_aux(gb, ga, db, da);
719 -------------------- 和欧文間空白量の決定
723 local get_xkanjiskip_normal, get_xkanjiskip_jfm
725 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
726 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
727 get_xkanjiskip_normal = function (Nn)
728 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
729 local f = node_copy(xkanji_skip)
732 local g = node_copy(zero_glue)
733 set_attr(g, attr_icflag, XKANJI_SKIP)
737 get_xkanjiskip_jfm = function (Nn)
739 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
740 g = node_new(id_glue)
741 local gx = node_new(id_glue_spec);
742 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
743 local bk = Nn.met.xkanjiskip or {0, 0, 0}
744 setfield(gx, 'width', bk[1])
745 setfield(gx, 'stretch', bk[2])
746 setfield(gx, 'shrink', bk[3])
747 setfield(g, 'spec', gx)
749 g = node_copy(zero_glue)
751 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
756 -------------------- 隣接した「塊」間の処理
758 local function get_OA_skip()
761 return new_jfm_glue(pm,
762 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
766 local function get_OB_skip()
769 return new_jfm_glue(qm, Nq.class,
770 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
775 -- (anything) .. jachar
776 local function handle_np_jachar(mode)
778 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
779 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
780 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
781 elseif Nq.met then -- qid==id_hlist
782 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
783 handle_penalty_normal(0, Np.pre, g); real_insert(g)
785 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
786 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
788 local g = get_OA_skip() -- O_A
789 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
790 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
791 else handle_penalty_always(0, Np.pre, g)
795 if mode and Np.kcat%2~=1 then
796 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
801 -- jachar .. (anything)
802 local function handle_nq_jachar()
804 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
805 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
807 local g = get_OB_skip() -- O_B
808 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
809 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
810 else handle_penalty_always(Nq.post, 0, g)
816 -- (anything) .. (和文文字で始まる hlist)
817 local function handle_np_ja_hlist()
819 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
820 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
821 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
822 elseif Nq.met then -- Nq.id==id_hlist
823 local g = get_kanjiskip() -- K
824 handle_penalty_suppress(0, 0, g); real_insert(g)
826 local g = get_xkanjiskip(Np) -- X
827 handle_penalty_suppress(0, 0, g); real_insert(g)
831 -- (和文文字で終わる hlist) .. (anything)
832 local function handle_nq_ja_hlist()
834 local g = get_xkanjiskip(Nq) -- X
835 handle_penalty_suppress(0, 0, g); real_insert(g)
840 -- Nq が前側のクラスタとなることによる修正
842 local adjust_nq_aux = {
843 [id_glyph] = function()
845 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
846 end, -- after_alchar(Nq)
847 [id_hlist] = function() after_hlist(Nq) end,
848 [id_pbox] = function() after_hlist(Nq) end,
849 [id_disc] = function() after_hlist(Nq) end,
850 [id_pbox_w] = function()
851 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
857 local x = adjust_nq_aux[Nq.id]
863 -------------------- 開始・終了時の処理
867 local JWP = luatexja.stack_table_index.JWP
868 local function handle_list_tail(mode)
871 -- the current list is to be line-breaked.
872 -- Insert \jcharwidowpenalty
873 Bp = widow_Bp; Np = widow_Np
875 handle_penalty_normal(0,
876 table_current_stack[JWP] or 0)
879 -- the current list is the contents of a hbox
880 local npi, pm = Np.id, Np.met
881 if npi == id_jglyph or (npi==id_pbox and pm) then
882 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
884 set_attr(g, attr_icflag, BOXBDD)
885 head = insert_after(head, Np.last, g)
892 local function handle_list_head(par_indented)
893 local npi, pm = Np.id, Np.met
894 if npi == id_jglyph or (npi==id_pbox and pm) then
896 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
898 set_attr(g, attr_icflag, BOXBDD)
899 if getid(g)==id_glue and #Bp==0 then
900 local h = node_new(id_penalty)
901 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
903 head = insert_before(head, Np.first, g)
910 -- return value: (the initial cursor lp), (last node)
913 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
914 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
915 local KSK = luatexja.stack_table_index.KSK
916 local XSK = luatexja.stack_table_index.XSK
917 init_var = function (mode)
918 -- 1073741823: max_dimen
919 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
920 table_current_stack = ltjs.table_current_stack
922 kanji_skip = node_new(id_glue)
923 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
924 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
925 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
926 and get_kanjiskip_jfm or get_kanjiskip_normal
928 xkanji_skip = node_new(id_glue)
929 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
930 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
931 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
932 and get_xkanjiskip_jfm or get_xkanjiskip_normal
935 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
936 first=nil, id=nil, last=nil, met=nil, nuc=nil,
937 post=nil, pre=nil, xspc=nil,
940 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
941 first=nil, id=nil, last=nil, met=nil, nuc=nil,
942 post=nil, pre=nil, xspc=nil,
945 -- the current list is to be line-breaked:
946 -- hbox from \parindent is skipped.
947 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
948 while lp and ((lpi==id_whatsit and lps~=sid_user)
949 or ((lpi==id_hlist) and (lps==3))) do
950 if (lpi==id_hlist) and (lps==3) then
951 Np.char, par_indented = 'parbdd', 'parbdd'
952 Np.width = getfield(lp, 'width')
954 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
955 return lp, node_tail(head), par_indented
957 return head, nil, 'boxbdd'
962 local function cleanup(mode)
963 -- adjust attr_icflag for avoiding error
964 tex.setattribute('global', attr_icflag, 0)
965 node_free(kanji_skip); node_free(xkanji_skip)
967 local h = node_next(head)
968 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
970 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
976 set_attr(head, attr_icflag,
977 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
981 -------------------- 外部から呼ばれる関数
984 function main(ahead, mode)
985 if not ahead then return ahead end
987 local lp, last, par_indented = init_var(mode)
988 lp = calc_np(lp, last)
990 extract_np(); handle_list_head(par_indented)
994 lp = calc_np(lp, last)
998 local pid, pm = Np.id, Np.met
1000 if pid == id_jglyph then
1001 handle_np_jachar(mode)
1003 if pid==id_hlist then handle_np_ja_hlist()
1004 else handle_np_jachar() end
1006 if Nq.id==id_hlist then handle_nq_ja_hlist()
1007 else handle_nq_jachar() end
1009 lp = calc_np(lp, last)
1011 handle_list_tail(mode)
1012 return cleanup(mode)
1017 local IHB = luatexja.userid_table.IHB
1018 local BPAR = luatexja.userid_table.BPAR
1019 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1020 local node_write = Dnode.write
1023 function create_inhibitglue_node()
1024 local tn = node_new(id_whatsit, sid_user)
1025 setfield(tn, 'user_id', IHB)
1026 setfield(tn, 'type', 100)
1027 setfield(tn, 'value', 1)
1031 -- Node for indicating beginning of a paragraph
1032 -- (for ltjsclasses)
1033 function create_beginpar_node()
1034 local tn = node_new(id_whatsit, sid_user)
1035 setfield(tn, 'user_id', BPAR)
1036 setfield(tn, 'type', 100)
1037 setfield(tn, 'value', 1)
1041 local function whatsit_callback(Np, lp, Nq)
1042 if Np and Np.nuc then return Np
1043 elseif Np and getfield(lp, 'user_id') == BPAR then
1044 Np.first = lp; Np.nuc = lp; Np.last = lp
1047 Np.pre = 0; Np.post = 0
1049 Np.auto_xspc = false
1054 local function whatsit_after_callback(s, Nq, Np)
1055 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1056 local x, y = node_prev(Nq.nuc), Nq.nuc
1057 Nq.first, Nq.nuc, Nq.last = x, x, x
1058 head = node_remove(head, y)
1064 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1065 "luatexja.beginpar.np_info", 1)
1066 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1067 "luatexja.beginpar.np_info_after", 1)