2 -- luatexja/ltj-jfmglue.lua
4 luatexbase.provides_module({
5 name = 'luatexja.jfmglue',
7 description = 'Insertion process of JFM glues and kanjiskip',
9 module('luatexja.jfmglue', package.seeall)
10 local err, warn, info, log = luatexbase .errwarinf(_NAME)
12 luatexja.load_module('stack'); local ltjs = luatexja.stack
13 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
16 local Dnode = node.direct or node
18 local nullfunc = function(n) return n end
19 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
20 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
22 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
23 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
24 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
25 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
26 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
27 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
28 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
30 local has_attr = Dnode.has_attribute
31 local set_attr = Dnode.set_attribute
32 local insert_before = Dnode.insert_before
33 local insert_after = Dnode.insert_after
34 local node_next = Dnode.getnext
35 local round = tex.round
36 local ltjf_font_metric_table = ltjf.font_metric_table
37 local ltjf_find_char_class = ltjf.find_char_class
38 local node_new = Dnode.new
39 local node_copy = Dnode.copy
40 local node_remove = Dnode.remove
41 local node_tail = Dnode.tail
42 local node_free = Dnode.free
43 local node_end_of_math = Dnode.end_of_math
46 local id_glyph = node.id('glyph')
47 local id_hlist = node.id('hlist')
48 local id_vlist = node.id('vlist')
49 local id_rule = node.id('rule')
50 local id_ins = node.id('ins')
51 local id_mark = node.id('mark')
52 local id_adjust = node.id('adjust')
53 local id_disc = node.id('disc')
54 local id_whatsit = node.id('whatsit')
55 local id_math = node.id('math')
56 local id_glue = node.id('glue')
57 local id_kern = node.id('kern')
58 local id_penalty = node.id('penalty')
60 local id_glue_spec = node.id('glue_spec')
61 local id_jglyph = 512 -- Japanese character
62 local id_box_like = 256 -- vbox, shifted hbox
63 local id_pbox = 257 -- already processed nodes (by \unhbox)
64 local id_pbox_w = 258 -- cluster which consists of a whatsit
65 local sid_user = node.subtype('user_defined')
67 local sid_start_link = node.subtype('pdf_start_link')
68 local sid_start_thread = node.subtype('pdf_start_thread')
69 local sid_end_link = node.subtype('pdf_end_link')
70 local sid_end_thread = node.subtype('pdf_end_thread')
72 local ITALIC = luatexja.icflag_table.ITALIC
73 local PACKED = luatexja.icflag_table.PACKED
74 local KINSOKU = luatexja.icflag_table.KINSOKU
75 local FROM_JFM = luatexja.icflag_table.FROM_JFM
76 local 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 if get_attr_icflag(p)==IC_PROCESSED then
194 elseif getsubtype(p)==2 then
195 p = node_next(node_next(p));
196 -- Note that another node_next will be executed outside this if-statement.
198 found_visible_node = true
199 find_first_char = false; last_char = nil
201 elseif pid==id_hlist then
202 if PACKED == get_attr_icflag(p) then
203 if find_first_char then
204 first_char = getlist(p); find_first_char = false
206 last_char = getlist(p); found_visible_node = true
208 if getfield(p, 'shift')==0 then
209 if check_box(getlist(p), nil) then found_visible_node = true end
211 find_first_char = false; last_char = nil
214 elseif pid==id_math then
215 if find_first_char then
216 first_char = p; find_first_char = false
218 last_char = p; found_visible_node = true
219 elseif not (pid==id_ins or pid==id_mark
220 or pid==id_adjust or pid==id_whatsit
221 or pid==id_penalty) then
222 found_visible_node = true
223 find_first_char = false; last_char = nil
227 return found_visible_node
230 function check_box_high(Nx, box_ptr, box_end)
231 first_char = nil; last_char = nil; find_first_char = true
232 if check_box(box_ptr, box_end) then
233 local first_char = first_char
235 if getid(first_char)==id_glyph then
236 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
237 set_np_xspc_jachar(Nx, first_char)
239 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
242 set_np_xspc_alchar(Nx, -1,first_char)
249 -------------------- Np の計算と情報取得
251 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
252 function (Np, lp, Nq)
253 if Np.nuc then return Np
255 return Np -- your code
258 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
259 function (stat, Nq, Np) return false end)
264 local function set_attr_icflag_processed(p)
265 if get_attr_icflag(p)<= ITALIC then
266 set_attr(p, attr_icflag, PROCESSED)
270 local function check_next_ickern(lp)
271 if getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
272 set_attr(lp, attr_icflag, IC_PROCESSED)
273 Np.last = lp; return node_next(lp)
275 Np.last = Np.nuc; return lp
279 local function calc_np_pbox(lp)
280 Np.first = Np.first or lp; Np.id = id_pbox
281 local lpa, nc = KINSOKU, nil
282 set_attr(lp, attr_icflag, get_attr_icflag(lp));
283 while lp and (lpa>=PACKED) and (lpa<BOXBDD) do
284 nc, lp = lp, node_next(lp); lpa = has_attr(lp, attr_icflag) or 0
285 -- get_attr_icflag() ではいけない!
288 return check_next_ickern(lp)
292 local calc_np_auxtable = {
293 [id_glyph] = function (lp)
294 Np.first, Np.nuc = (Np.first or lp), lp;
295 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
296 and id_jglyph or id_glyph
297 return true, check_next_ickern(node_next(lp));
299 [id_hlist] = function(lp)
300 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
301 set_attr(lp, attr_icflag, PROCESSED)
302 Np.id = (getfield(lp, 'shift')~=0) and id_box_like or id_hlist
303 return true, node_next(lp)
305 box_like = function(lp)
306 Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
307 Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
308 return true, node_next(lp);
311 set_attr(lp, attr_icflag, PROCESSED)
312 return false, node_next(lp)
314 [id_whatsit] = function(lp)
315 local lps = getsubtype(lp)
316 if lps==sid_user then
317 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
318 local lq = node_next(lp);
319 head = node_remove(head, lp); node_free(lp); ihb_flag = true
322 set_attr(lp, attr_icflag, PROCESSED)
323 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
326 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
327 return true, node_next(lp)
329 return false, node_next(lp)
333 -- we do special treatment for these whatsit nodes.
334 if lps == sid_start_link or lps == sid_start_thread then
336 elseif lps == sid_end_link or lps == sid_end_thread then
337 Np.first, Nq.last = nil, lp;
339 set_attr(lp, attr_icflag, PROCESSED)
340 return false, node_next(lp)
343 [id_math] = function(lp)
344 Np.first, Np.nuc = (Np.first or lp), lp;
345 set_attr(lp, attr_icflag, PROCESSED)
346 lp = node_end_of_math(lp)
347 set_attr(lp, attr_icflag, PROCESSED)
348 Np.last, Np.id = lp, id_math;
349 return true, node_next(lp);
351 discglue = function(lp)
352 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
353 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
354 return true, node_next(lp)
356 [id_kern] = function(lp)
357 Np.first = Np.first or lp
358 if getsubtype(lp)==2 then
359 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
360 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
361 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
362 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
363 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
364 return true, check_next_ickern(node_next(lp));
366 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
367 Np.last = lp; return true, node_next(lp)
370 [id_penalty] = function(lp)
371 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
372 return false, node_next(lp)
375 calc_np_auxtable[id_vlist] = calc_np_auxtable.box_like
376 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
377 calc_np_auxtable[13] = calc_np_auxtable.box_like
378 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
379 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
380 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
381 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
382 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
386 -- We assume lp = node_next(Np.last)
387 Np, Nq, ihb_flag = Nq, Np, nil
388 -- We clear `predefined' entries of Np before pairs() loop,
389 -- because using only pairs() loop is slower.
390 Np.post, Np.pre, Np.xspc = nil, nil, nil
391 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
392 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
393 for k in pairs(Np) do Np[k] = nil end
395 for k = 1,#Bp do Bp[k] = nil end
397 local lpa = has_attr(lp, attr_icflag) or 0
400 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
401 local lq = node_next(lp)
402 head = node_remove(head, lp); node_free(lp); lp = lq
403 else return calc_np_pbox(lp)
406 k, lp = calc_np_auxtable[getid(lp)](lp)
407 if k then return lp end
414 local calc_np = calc_np
416 -- extract informations from Np
417 -- We think that "Np is a Japanese character" if Np.met~=nil,
418 -- "Np is an alphabetic character" if Np.pre~=nil,
419 -- "Np is not a character" otherwise.
420 local after_hlist, after_alchar, extract_np
422 local PRE = luatexja.stack_table_index.PRE
423 local POST = luatexja.stack_table_index.POST
424 local KCAT = luatexja.stack_table_index.KCAT
425 local XSP = luatexja.stack_table_index.XSP
428 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
429 local attr_orig_char = luatexbase.attributes['ltj@origchar']
430 local attr_autospc = luatexbase.attributes['ltj@autospc']
431 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
432 function set_np_xspc_jachar(Nx, x)
433 local m = ltjf_font_metric_table[getfont(x)]
434 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
435 Nx.met, Nx.char = m, c; Nx.class = cls;
436 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
437 Nx.pre = table_current_stack[PRE + c] or 0
438 Nx.post = table_current_stack[POST + c] or 0
439 Nx.xspc = table_current_stack[XSP + c] or 3
440 Nx.kcat = table_current_stack[KCAT + c] or 0
441 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
443 local set_np_xspc_jachar = set_np_xspc_jachar
446 local floor = math.floor
447 function set_np_xspc_alchar(Nx, c,x, lig)
449 local f = (lig ==1) and nullfunc or node_tail
450 local xc, xs = getfield(x, 'components'), getsubtype(x)
451 while xc and xs and xs%4>=2 do
452 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
455 Nx.pre = table_current_stack[PRE + c] or 0
456 Nx.post = table_current_stack[POST + c] or 0
457 Nx.xspc = table_current_stack[XSP + c] or 3
460 Nx.pre, Nx.post, Nx.char = 0, 0, -1
461 Nx.xspc = table_current_stack[XSP - 1] or 3
464 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
466 local set_np_xspc_alchar = set_np_xspc_alchar
469 extract_np = function ()
470 local x, i = Np.nuc, Np.id;
471 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
472 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
473 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
474 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
475 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
476 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
480 -- change the information for the next loop
481 -- (will be done if Nx is an alphabetic character or a hlist)
482 after_hlist = function (Nx)
483 local s = Nx.last_char
485 if getid(s)==id_glyph then
486 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
487 set_np_xspc_jachar(Nx, s)
489 set_np_xspc_alchar(Nx, getchar(s), s, 2)
492 set_np_xspc_alchar(Nx, -1, s)
495 Nx.pre, Nx.met = nil, nil
499 after_alchar = function (Nx)
501 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
506 -------------------- 最下層の処理
508 -- change penalties (or create a new penalty, if needed)
509 local function handle_penalty_normal(post, pre, g)
510 local a = (pre or 0) + (post or 0)
512 if (a~=0 and not(g and getid(g)==id_kern)) then
513 local p = node_new(id_penalty)
514 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
515 setfield(p, 'penalty', a)
516 head = insert_before(head, Np.first, p)
518 set_attr(p, attr_icflag, KINSOKU)
520 else for _, v in pairs(Bp) do add_penalty(v,a) end
524 local function handle_penalty_always(post, pre, g)
525 local a = (pre or 0) + (post or 0)
527 if not (g and getid(g)==id_glue) then
528 local p = node_new(id_penalty)
529 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
530 setfield(p, 'penalty', a)
531 head = insert_before(head, Np.first, p)
533 set_attr(p, attr_icflag, KINSOKU)
535 else for _, v in pairs(Bp) do add_penalty(v,a) end
539 local function handle_penalty_suppress(post, pre, g)
540 local a = (pre or 0) + (post or 0)
542 if g and getid(g)==id_glue then
543 local p = node_new(id_penalty)
544 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
546 set_attr(p, attr_icflag, KINSOKU)
548 else for _, v in pairs(Bp) do add_penalty(v,a) end
552 -- 和文文字間の JFM glue を node 化
553 local function new_jfm_glue(m, bc, ac)
554 -- bc, ac: char classes
555 local g, d = m.char_type[bc][ac], 0
558 n,d = node_copy(g[2]), g[3]
560 local f = node_new(id_glue)
561 set_attr(f, attr_icflag, g[4])
562 setfield(f, 'spec', n)
569 -- Nq.last (kern w) .... (glue/kern g) Np.first
570 local function real_insert(g)
572 head = insert_before(head, Np.first, g)
578 -------------------- 和文文字間空白量の決定
582 local get_kanjiskip_normal, get_kanjiskip_jfm
584 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
585 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
586 get_kanjiskip_normal = function ()
587 if Np.auto_kspc or Nq.auto_kspc then
588 return node_copy(kanji_skip)
590 local g = node_copy(zero_glue)
591 set_attr(g, attr_icflag, KANJI_SKIP)
596 get_kanjiskip_jfm = function ()
598 if Np.auto_kspc or Nq.auto_kspc then
599 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
600 local gx = node_new(id_glue_spec);
601 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
602 local pm, qm = Np.met, Nq.met
603 local bk = qm.kanjiskip or {0, 0, 0}
604 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
605 setfield(gx, 'width', bk[1])
606 setfield(gx, 'stretch', bk[2])
607 setfield(gx, 'shrink', bk[3])
609 local ak = pm.kanjiskip or {0, 0, 0}
610 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
611 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
612 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
614 setfield(g, 'spec', gx)
616 g = node_copy(zero_glue)
618 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
625 local bg_ag = 2*id_glue - id_glue
626 local bg_ak = 2*id_glue - id_kern
627 local bk_ag = 2*id_kern - id_glue
628 local bk_ak = 2*id_kern - id_kern
630 calc_ja_ja_aux = function (gb,ga, db, da)
631 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
632 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
633 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
634 and diffmet_rule ~= math.two_paverage then
635 rbb, rab, rba, raa = 1,0,0,1
639 gb = node_new(id_kern); setfield(gb, 'kern', 0)
642 ga = node_new(id_kern); setfield(ga, 'kern', 0)
645 local k = 2*getid(gb) - getid(ga)
647 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
649 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
650 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
651 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
652 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
653 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
654 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
657 elseif k == bk_ak then
659 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
660 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
663 elseif k == bk_ag then
664 local as = getfield(ga, 'spec')
665 -- gb: kern, ga: glue
666 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
667 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
668 ad = getfield(as, 'stretch')
669 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
670 ad = getfield(as, 'shrink')
671 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
675 local bs = getfield(gb, 'spec')
676 -- gb: glue, ga: kern
677 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
678 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
679 bd = getfield(bs, 'stretch')
680 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
681 bd = getfield(bs, 'shrink')
682 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
689 local function calc_ja_ja_glue()
690 if ihb_flag then return nil
692 local qm, pm = Nq.met, Np.met
693 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
694 return new_jfm_glue(qm, Nq.class, Np.class)
696 local npn, nqn = Np.nuc, Nq.nuc
697 local gb, db = new_jfm_glue(qm, Nq.class,
698 slow_find_char_class(has_attr(npn, attr_orig_char),
700 local ga, da = new_jfm_glue(pm,
701 slow_find_char_class(has_attr(nqn, attr_orig_char),
704 return calc_ja_ja_aux(gb, ga, db, da);
709 -------------------- 和欧文間空白量の決定
713 local get_xkanjiskip_normal, get_xkanjiskip_jfm
715 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
716 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
717 get_xkanjiskip_normal = function (Nn)
718 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
719 local f = node_copy(xkanji_skip)
722 local g = node_copy(zero_glue)
723 set_attr(g, attr_icflag, XKANJI_SKIP)
727 get_xkanjiskip_jfm = function (Nn)
729 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
730 g = node_new(id_glue)
731 local gx = node_new(id_glue_spec);
732 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
733 local bk = Nn.met.xkanjiskip or {0, 0, 0}
734 setfield(gx, 'width', bk[1])
735 setfield(gx, 'stretch', bk[2])
736 setfield(gx, 'shrink', bk[3])
737 setfield(g, 'spec', gx)
739 g = node_copy(zero_glue)
741 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
746 -------------------- 隣接した「塊」間の処理
748 local function get_OA_skip()
751 return new_jfm_glue(pm,
752 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
756 local function get_OB_skip()
759 return new_jfm_glue(qm, Nq.class,
760 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
765 -- (anything) .. jachar
766 local function handle_np_jachar(mode)
768 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
769 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
770 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
771 elseif Nq.met then -- qid==id_hlist
772 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
773 handle_penalty_normal(0, Np.pre, g); real_insert(g)
775 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
776 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
778 local g = get_OA_skip() -- O_A
779 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
780 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
781 else handle_penalty_always(0, Np.pre, g)
785 if mode and Np.kcat%2~=1 then
786 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
791 -- jachar .. (anything)
792 local function handle_nq_jachar()
794 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
795 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
797 local g = get_OB_skip() -- O_B
798 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
799 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
800 else handle_penalty_always(Nq.post, 0, g)
806 -- (anything) .. (和文文字で始まる hlist)
807 local function handle_np_ja_hlist()
809 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
810 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
811 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
812 elseif Nq.met then -- Nq.id==id_hlist
813 local g = get_kanjiskip() -- K
814 handle_penalty_suppress(0, 0, g); real_insert(g)
816 local g = get_xkanjiskip(Np) -- X
817 handle_penalty_suppress(0, 0, g); real_insert(g)
821 -- (和文文字で終わる hlist) .. (anything)
822 local function handle_nq_ja_hlist()
824 local g = get_xkanjiskip(Nq) -- X
825 handle_penalty_suppress(0, 0, g); real_insert(g)
830 -- Nq が前側のクラスタとなることによる修正
832 local adjust_nq_aux = {
833 [id_glyph] = function()
835 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
836 end, -- after_alchar(Nq)
837 [id_hlist] = function() after_hlist(Nq) end,
838 [id_pbox] = function() after_hlist(Nq) end,
839 [id_disc] = function() after_hlist(Nq) end,
840 [id_pbox_w] = function()
841 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
847 local x = adjust_nq_aux[Nq.id]
853 -------------------- 開始・終了時の処理
857 local JWP = luatexja.stack_table_index.JWP
858 local function handle_list_tail(mode)
861 -- the current list is to be line-breaked.
862 -- Insert \jcharwidowpenalty
863 Bp = widow_Bp; Np = widow_Np
865 handle_penalty_normal(0,
866 table_current_stack[JWP] or 0)
869 -- the current list is the contents of a hbox
870 local npi, pm = Np.id, Np.met
871 if npi == id_jglyph or (npi==id_pbox and pm) then
872 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
874 set_attr(g, attr_icflag, BOXBDD)
875 head = insert_after(head, Np.last, g)
882 local function handle_list_head(par_indented)
883 local npi, pm = Np.id, Np.met
884 if npi == id_jglyph or (npi==id_pbox and pm) then
886 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
888 set_attr(g, attr_icflag, BOXBDD)
889 if getid(g)==id_glue and #Bp==0 then
890 local h = node_new(id_penalty)
891 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
893 head = insert_before(head, Np.first, g)
900 -- return value: (the initial cursor lp), (last node)
903 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
904 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
905 local KSK = luatexja.stack_table_index.KSK
906 local XSK = luatexja.stack_table_index.XSK
907 init_var = function (mode)
908 -- 1073741823: max_dimen
909 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
910 table_current_stack = ltjs.table_current_stack
912 kanji_skip = node_new(id_glue)
913 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
914 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
915 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
916 and get_kanjiskip_jfm or get_kanjiskip_normal
918 xkanji_skip = node_new(id_glue)
919 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
920 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
921 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
922 and get_xkanjiskip_jfm or get_xkanjiskip_normal
925 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
926 first=nil, id=nil, last=nil, met=nil, nuc=nil,
927 post=nil, pre=nil, xspc=nil,
930 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
931 first=nil, id=nil, last=nil, met=nil, nuc=nil,
932 post=nil, pre=nil, xspc=nil,
935 -- the current list is to be line-breaked:
936 -- hbox from \parindent is skipped.
937 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
938 while lp and ((lpi==id_whatsit and lps~=sid_user)
939 or ((lpi==id_hlist) and (lps==3))) do
940 if (lpi==id_hlist) and (lps==3) then par_indented = 'parbdd' end
941 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
942 return lp, par_indented
944 return head, 'boxbdd'
949 local function cleanup(mode)
950 -- adjust attr_icflag for avoiding error
951 tex.setattribute('global', attr_icflag, 0)
952 node_free(kanji_skip); node_free(xkanji_skip)
954 local h = node_next(head)
955 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
957 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
963 set_attr(head, attr_icflag,
964 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
968 -------------------- 外部から呼ばれる関数
971 function main(ahead, mode)
972 if not ahead then return ahead end
974 local lp, par_indented = init_var(mode);
975 lp = calc_np(lp, last)
977 extract_np(); handle_list_head(par_indented)
979 return cleanup(mode, last)
985 local pid, pm = Np.id, Np.met
987 if pid == id_jglyph then
988 handle_np_jachar(mode)
990 if pid==id_hlist then handle_np_ja_hlist()
991 else handle_np_jachar() end
993 if Nq.id==id_hlist then handle_nq_ja_hlist()
994 else handle_nq_jachar() end
998 handle_list_tail(mode)
1004 local IHB = luatexja.userid_table.IHB
1005 local BPAR = luatexja.userid_table.BPAR
1006 local node_prev = Dnode.getprev
1007 local node_write = Dnode.write
1010 function create_inhibitglue_node()
1011 local tn = node_new(id_whatsit, sid_user)
1012 setfield(tn, 'user_id', IHB)
1013 setfield(tn, 'type', 100)
1014 setfield(tn, 'value', 1)
1018 -- Node for indicating beginning of a paragraph
1019 -- (for ltjsclasses)
1020 function create_beginpar_node()
1021 local tn = node_new(id_whatsit, sid_user)
1022 setfield(tn, 'user_id', BPAR)
1023 setfield(tn, 'type', 100)
1024 setfield(tn, 'value', 1)
1028 local function whatsit_callback(Np, lp, Nq)
1029 if Np and Np.nuc then return Np
1030 elseif Np and getfield(lp, 'user_id') == BPAR then
1031 Np.first = lp; Np.nuc = lp; Np.last = lp
1034 Np.pre = 0; Np.post = 0
1036 Np.auto_xspc = false
1041 local function whatsit_after_callback(s, Nq, Np)
1042 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1043 local x, y = node_prev(Nq.nuc), Nq.nuc
1044 Nq.first, Nq.nuc, Nq.last = x, x, x
1045 head = node_remove(head, y)
1051 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1052 "luatexja.beginpar.np_info", 1)
1053 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1054 "luatexja.beginpar.np_info_after", 1)