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 ltjd_glyph_from_packed = ltjd.glyph_from_packed
175 local function check_box(box_ptr, box_end)
176 local p = box_ptr; local found_visible_node = false
178 find_first_char = false; last_char = nil
181 while p and p~=box_end do
183 if pid==id_kern and getsubtype(p)==2 then
184 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
186 if pid==id_glyph then
188 if find_first_char then
189 first_char = p; find_first_char = false
191 last_char = p; found_visible_node = true; p=node_next(p)
192 if (not p) or p==box_end then
193 return found_visible_node
195 until getid(p)~=id_glyph
196 pid = getid(p) -- p must be non-nil
199 local pa = get_attr_icflag(p)
200 --if pa==IC_PROCESSED or pa == PACKED then
201 if pa==IC_PROCESSED then
203 elseif getsubtype(p)==2 then
204 p = node_next(node_next(p));
205 -- Note that another node_next will be executed outside this if-statement.
207 found_visible_node = true
208 find_first_char = false; last_char = nil
210 elseif pid==id_hlist then
211 if PACKED == get_attr_icflag(p) then
212 local s = ltjd_glyph_from_packed(p)
213 if find_first_char then
214 first_char = s; find_first_char = false
216 last_char = s; found_visible_node = true
218 if getfield(p, 'shift')==0 then
219 if check_box(getlist(p), nil) then found_visible_node = true end
221 find_first_char = false; last_char = nil
224 elseif pid==id_math then
225 if find_first_char then
226 first_char = p; find_first_char = false
228 last_char = p; found_visible_node = true
229 --elseif pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
230 elseif not (pid==id_ins or pid==id_mark
231 or pid==id_adjust or pid==id_whatsit
232 or pid==id_penalty) then
233 found_visible_node = true
234 find_first_char = false; last_char = nil
238 return found_visible_node
241 function check_box_high(Nx, box_ptr, box_end)
242 first_char = nil; last_char = nil; find_first_char = true
243 if check_box(box_ptr, box_end) then
244 local first_char = first_char
246 if getid(first_char)==id_glyph then
247 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
248 set_np_xspc_jachar(Nx, first_char)
250 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
253 set_np_xspc_alchar(Nx, -1,first_char)
260 -------------------- Np の計算と情報取得
262 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
263 function (Np, lp, Nq)
264 if Np.nuc then return Np
266 return Np -- your code
269 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
270 function (stat, Nq, Np) return false end)
275 local function set_attr_icflag_processed(p)
276 if get_attr_icflag(p)<= ITALIC then
277 set_attr(p, attr_icflag, PROCESSED)
281 local function check_next_ickern(lp)
282 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
283 set_attr(lp, attr_icflag, IC_PROCESSED)
284 Np.last = lp; return node_next(lp)
286 Np.last = Np.nuc; return lp
290 local function calc_np_pbox(lp, last)
291 Np.first = Np.first or lp; Np.id = id_pbox
292 local lpa, nc = KINSOKU, nil
293 set_attr(lp, attr_icflag, get_attr_icflag(lp));
294 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
295 nc, lp = lp, node_next(lp); lpa = lp and has_attr(lp, attr_icflag) or 0
296 -- get_attr_icflag() ではいけない!
299 return check_next_ickern(lp)
303 local calc_np_auxtable = {
304 [id_glyph] = function (lp)
305 Np.first, Np.nuc = (Np.first or lp), lp;
306 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
307 and id_jglyph or id_glyph
308 return true, check_next_ickern(node_next(lp));
310 [id_hlist] = function(lp)
312 head, lp, op, flag = ltjd_make_dir_node(head, lp, list_dir, 'jfm hlist')
313 set_attr(op, attr_icflag, PROCESSED)
314 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
315 Np.id = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
318 [id_vlist] = function(lp)
320 head, lp, op = ltjd_make_dir_node(head, lp, list_dir, 'jfm:' .. getid(lp))
321 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
325 box_like = function(lp)
326 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
328 return true, node_next(lp)
331 set_attr(lp, attr_icflag, PROCESSED)
332 return false, node_next(lp)
334 [id_whatsit] = function(lp)
335 local lps = getsubtype(lp)
336 if lps==sid_user then
337 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
338 local lq = node_next(lp);
339 head = node_remove(head, lp); node_free(lp); ihb_flag = true
342 set_attr(lp, attr_icflag, PROCESSED)
343 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
346 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
347 return true, node_next(lp)
349 return false, node_next(lp)
353 -- we do special treatment for these whatsit nodes.
354 if lps == sid_start_link or lps == sid_start_thread then
356 elseif lps == sid_end_link or lps == sid_end_thread then
357 Np.first, Nq.last = nil, lp;
359 set_attr(lp, attr_icflag, PROCESSED)
360 return false, node_next(lp)
363 [id_math] = function(lp)
364 Np.first, Np.nuc = (Np.first or lp), lp;
365 set_attr(lp, attr_icflag, PROCESSED)
366 lp = node_end_of_math(lp)
367 set_attr(lp, attr_icflag, PROCESSED)
368 Np.last, Np.id = lp, id_math;
369 return true, node_next(lp);
371 discglue = function(lp)
372 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
373 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
374 return true, node_next(lp)
376 [id_kern] = function(lp)
377 Np.first = Np.first or lp
378 if getsubtype(lp)==2 then
379 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
380 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
381 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
382 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
383 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
384 return true, check_next_ickern(node_next(lp));
386 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
387 Np.last = lp; return true, node_next(lp)
390 [id_penalty] = function(lp)
391 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
392 return false, node_next(lp)
395 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
396 calc_np_auxtable[13] = calc_np_auxtable.box_like
397 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
398 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
399 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
400 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
401 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
403 function calc_np(lp, last)
405 -- We assume lp = node_next(Np.last)
406 Np, Nq, ihb_flag = Nq, Np, nil
407 -- We clear `predefined' entries of Np before pairs() loop,
408 -- because using only pairs() loop is slower.
409 Np.post, Np.pre, Np.xspc = nil, nil, nil
410 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
411 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
412 for k in pairs(Np) do Np[k] = nil end
414 for k = 1,#Bp do Bp[k] = nil end
416 local lpa = has_attr(lp, attr_icflag) or 0
419 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
420 local lq = node_next(lp)
421 head = node_remove(head, lp); node_free(lp); lp = lq
422 else return calc_np_pbox(lp, last)
425 k, lp = calc_np_auxtable[getid(lp)](lp)
426 if k then return lp end
433 local calc_np = calc_np
435 -- extract informations from Np
436 -- We think that "Np is a Japanese character" if Np.met~=nil,
437 -- "Np is an alphabetic character" if Np.pre~=nil,
438 -- "Np is not a character" otherwise.
439 after_hlist = nil -- global
440 local after_alchar, extract_np
442 local PRE = luatexja.stack_table_index.PRE
443 local POST = luatexja.stack_table_index.POST
444 local KCAT = luatexja.stack_table_index.KCAT
445 local XSP = luatexja.stack_table_index.XSP
448 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
449 local attr_orig_char = luatexbase.attributes['ltj@origchar']
450 local attr_autospc = luatexbase.attributes['ltj@autospc']
451 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
452 function set_np_xspc_jachar(Nx, x)
453 local m = ltjf_font_metric_table[getfont(x)]
455 if list_dir == dir_tate then
456 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
457 c = has_attr(x, attr_dir) or c1 or c2
458 cls = ltjf_find_char_class(c, m)
459 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
461 cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
463 Nx.met, Nx.char = m, c; Nx.class = cls;
464 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
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
468 Nx.kcat = table_current_stack[KCAT + c] or 0
469 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
471 local set_np_xspc_jachar = set_np_xspc_jachar
474 local floor = math.floor
475 function set_np_xspc_alchar(Nx, c,x, lig)
477 local f = (lig ==1) and nullfunc or node_tail
478 local xc, xs = getfield(x, 'components'), getsubtype(x)
479 while xc and xs and xs%4>=2 do
480 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
483 Nx.pre = table_current_stack[PRE + c] or 0
484 Nx.post = table_current_stack[POST + c] or 0
485 Nx.xspc = table_current_stack[XSP + c] or 3
488 Nx.pre, Nx.post, Nx.char = 0, 0, -1
489 Nx.xspc = table_current_stack[XSP - 1] or 3
492 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
494 local set_np_xspc_alchar = set_np_xspc_alchar
497 extract_np = function ()
498 local x, i = Np.nuc, Np.id;
499 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
500 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
501 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
502 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
503 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
504 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
508 -- change the information for the next loop
509 -- (will be done if Nx is an alphabetic character or a hlist)
510 after_hlist = function (Nx)
511 local s = Nx.last_char
513 if getid(s)==id_glyph then
514 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
515 set_np_xspc_jachar(Nx, s)
517 set_np_xspc_alchar(Nx, getchar(s), s, 2)
520 set_np_xspc_alchar(Nx, -1, s)
523 Nx.pre, Nx.met = nil, nil
527 after_alchar = function (Nx)
529 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
534 -------------------- 最下層の処理
536 -- change penalties (or create a new penalty, if needed)
537 local function handle_penalty_normal(post, pre, g)
538 local a = (pre or 0) + (post or 0)
540 if (a~=0 and not(g and getid(g)==id_kern)) then
541 local p = node_new(id_penalty)
542 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
543 setfield(p, 'penalty', a)
544 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 local function handle_penalty_always(post, pre, g)
553 local a = (pre or 0) + (post or 0)
555 if not (g and getid(g)==id_glue) then
556 local p = node_new(id_penalty)
557 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
558 setfield(p, 'penalty', a)
559 head = insert_before(head, Np.first, p)
561 set_attr(p, attr_icflag, KINSOKU)
563 else for _, v in pairs(Bp) do add_penalty(v,a) end
567 local function handle_penalty_suppress(post, pre, g)
568 local a = (pre or 0) + (post or 0)
570 if g and getid(g)==id_glue then
571 local p = node_new(id_penalty)
572 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
574 set_attr(p, attr_icflag, KINSOKU)
576 else for _, v in pairs(Bp) do add_penalty(v,a) end
580 -- 和文文字間の JFM glue を node 化
581 local function new_jfm_glue(m, bc, ac)
582 -- bc, ac: char classes
583 local g, d = m.char_type[bc][ac], 0
586 n,d = node_copy(g[2]), g[3]
588 local f = node_new(id_glue)
589 set_attr(f, attr_icflag, g[4])
590 setfield(f, 'spec', n)
597 -- Nq.last (kern w) .... (glue/kern g) Np.first
598 local function real_insert(g)
600 head = insert_before(head, Np.first, g)
606 -------------------- 和文文字間空白量の決定
610 local get_kanjiskip_normal, get_kanjiskip_jfm
612 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
613 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
614 get_kanjiskip_normal = function ()
615 if Np.auto_kspc or Nq.auto_kspc then
616 return node_copy(kanji_skip)
618 local g = node_copy(zero_glue)
619 set_attr(g, attr_icflag, KANJI_SKIP)
624 get_kanjiskip_jfm = function ()
626 if Np.auto_kspc or Nq.auto_kspc then
627 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
628 local gx = node_new(id_glue_spec);
629 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
630 local pm, qm = Np.met, Nq.met
631 local bk = qm.kanjiskip or {0, 0, 0}
632 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
633 setfield(gx, 'width', bk[1])
634 setfield(gx, 'stretch', bk[2])
635 setfield(gx, 'shrink', bk[3])
637 local ak = pm.kanjiskip or {0, 0, 0}
638 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
639 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
640 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
642 setfield(g, 'spec', gx)
644 g = node_copy(zero_glue)
646 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
653 local bg_ag = 2*id_glue - id_glue
654 local bg_ak = 2*id_glue - id_kern
655 local bk_ag = 2*id_kern - id_glue
656 local bk_ak = 2*id_kern - id_kern
658 calc_ja_ja_aux = function (gb,ga, db, da)
659 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
660 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
661 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
662 and diffmet_rule ~= math.two_paverage then
663 rbb, rab, rba, raa = 1,0,0,1
667 gb = node_new(id_kern); setfield(gb, 'kern', 0)
670 ga = node_new(id_kern); setfield(ga, 'kern', 0)
673 local k = 2*getid(gb) - getid(ga)
675 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
677 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
678 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
679 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
680 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
681 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
682 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
685 elseif k == bk_ak then
687 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
688 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
691 elseif k == bk_ag then
692 local as = getfield(ga, 'spec')
693 -- gb: kern, ga: glue
694 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
695 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
696 ad = getfield(as, 'stretch')
697 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
698 ad = getfield(as, 'shrink')
699 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
703 local bs = getfield(gb, 'spec')
704 -- gb: glue, ga: kern
705 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
706 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
707 bd = getfield(bs, 'stretch')
708 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
709 bd = getfield(bs, 'shrink')
710 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
717 local function calc_ja_ja_glue()
718 if ihb_flag then return nil
720 local qm, pm = Nq.met, Np.met
721 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
722 return new_jfm_glue(qm, Nq.class, Np.class)
724 local npn, nqn = Np.nuc, Nq.nuc
725 local gb, db = new_jfm_glue(qm, Nq.class,
726 slow_find_char_class(has_attr(npn, attr_orig_char),
728 local ga, da = new_jfm_glue(pm,
729 slow_find_char_class(has_attr(nqn, attr_orig_char),
732 return calc_ja_ja_aux(gb, ga, db, da);
737 -------------------- 和欧文間空白量の決定
741 local get_xkanjiskip_normal, get_xkanjiskip_jfm
743 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
744 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
745 get_xkanjiskip_normal = function (Nn)
746 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
747 local f = node_copy(xkanji_skip)
750 local g = node_copy(zero_glue)
751 set_attr(g, attr_icflag, XKANJI_SKIP)
755 get_xkanjiskip_jfm = function (Nn)
757 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
758 g = node_new(id_glue)
759 local gx = node_new(id_glue_spec);
760 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
761 local bk = Nn.met.xkanjiskip or {0, 0, 0}
762 setfield(gx, 'width', bk[1])
763 setfield(gx, 'stretch', bk[2])
764 setfield(gx, 'shrink', bk[3])
765 setfield(g, 'spec', gx)
767 g = node_copy(zero_glue)
769 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
774 -------------------- 隣接した「塊」間の処理
776 local function get_OA_skip()
779 return new_jfm_glue(pm,
780 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
784 local function get_OB_skip()
787 return new_jfm_glue(qm, Nq.class,
788 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
793 -- (anything) .. jachar
794 local function handle_np_jachar(mode)
796 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
797 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
798 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
799 elseif Nq.met then -- qid==id_hlist
800 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
801 handle_penalty_normal(0, Np.pre, g); real_insert(g)
803 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
804 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
806 local g = get_OA_skip() -- O_A
807 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
808 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
809 else handle_penalty_always(0, Np.pre, g)
813 if mode and Np.kcat%2~=1 then
814 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
819 -- jachar .. (anything)
820 local function handle_nq_jachar()
822 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
823 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
825 local g = get_OB_skip() -- O_B
826 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
827 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
828 else handle_penalty_always(Nq.post, 0, g)
834 -- (anything) .. (和文文字で始まる hlist)
835 local function handle_np_ja_hlist()
837 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
838 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
839 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
840 elseif Nq.met then -- Nq.id==id_hlist
841 local g = get_kanjiskip() -- K
842 handle_penalty_suppress(0, 0, g); real_insert(g)
844 local g = get_xkanjiskip(Np) -- X
845 handle_penalty_suppress(0, 0, g); real_insert(g)
849 -- (和文文字で終わる hlist) .. (anything)
850 local function handle_nq_ja_hlist()
852 local g = get_xkanjiskip(Nq) -- X
853 handle_penalty_suppress(0, 0, g); real_insert(g)
858 -- Nq が前側のクラスタとなることによる修正
860 local adjust_nq_aux = {
861 [id_glyph] = function()
863 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
864 end, -- after_alchar(Nq)
865 [id_hlist] = function() after_hlist(Nq) end,
866 [id_pbox] = function() after_hlist(Nq) end,
867 [id_disc] = function() after_hlist(Nq) end,
868 [id_pbox_w] = function()
869 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
875 local x = adjust_nq_aux[Nq.id]
881 -------------------- 開始・終了時の処理
885 local JWP = luatexja.stack_table_index.JWP
886 local function handle_list_tail(mode)
889 -- the current list is to be line-breaked.
890 -- Insert \jcharwidowpenalty
891 Bp = widow_Bp; Np = widow_Np
893 handle_penalty_normal(0,
894 table_current_stack[JWP] or 0)
897 -- the current list is the contents of a hbox
898 local npi, pm = Np.id, Np.met
899 if npi == id_jglyph or (npi==id_pbox and pm) then
900 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
902 set_attr(g, attr_icflag, BOXBDD)
903 head = insert_after(head, Np.last, g)
910 local function handle_list_head(par_indented)
911 local npi, pm = Np.id, Np.met
912 if npi == id_jglyph or (npi==id_pbox and pm) then
914 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
916 set_attr(g, attr_icflag, BOXBDD)
917 if getid(g)==id_glue and #Bp==0 then
918 local h = node_new(id_penalty)
919 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
921 head = insert_before(head, Np.first, g)
928 -- return value: (the initial cursor lp), (last node)
931 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
932 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
933 local KSK = luatexja.stack_table_index.KSK
934 local XSK = luatexja.stack_table_index.XSK
935 local DIR = luatexja.stack_table_index.DIR
936 init_var = function (mode)
937 -- 1073741823: max_dimen
938 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
939 table_current_stack = ltjs.table_current_stack
941 list_dir = ltjs.list_dir or dir_yoko
942 kanji_skip = node_new(id_glue)
943 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
944 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
945 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
946 and get_kanjiskip_jfm or get_kanjiskip_normal
948 xkanji_skip = node_new(id_glue)
949 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
950 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
951 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
952 and get_xkanjiskip_jfm or get_xkanjiskip_normal
955 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
956 first=nil, id=nil, last=nil, met=nil, nuc=nil,
957 post=nil, pre=nil, xspc=nil,
960 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
961 first=nil, id=nil, last=nil, met=nil, nuc=nil,
962 post=nil, pre=nil, xspc=nil,
965 -- the current list is to be line-breaked:
966 -- hbox from \parindent is skipped.
967 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
968 while lp and ((lpi==id_whatsit and lps~=sid_user)
969 or ((lpi==id_hlist) and (lps==3))) do
970 if (lpi==id_hlist) and (lps==3) then
971 Np.char, par_indented = 'parbdd', 'parbdd'
972 Np.width = getfield(lp, 'width')
974 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
975 return lp, node_tail(head), par_indented
977 return head, nil, 'boxbdd'
982 local function cleanup(mode)
983 -- adjust attr_icflag for avoiding error
984 tex.setattribute('global', attr_icflag, 0)
985 node_free(kanji_skip); node_free(xkanji_skip)
987 local h = node_next(head)
988 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
990 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
996 set_attr(head, attr_icflag,
997 get_attr_icflag(head) + PROCESSED_BEGIN_FLAG);
1001 -------------------- 外部から呼ばれる関数
1004 function main(ahead, mode)
1005 if not ahead then return ahead end
1007 local lp, last, par_indented = init_var(mode)
1008 lp = calc_np(lp, last)
1010 extract_np(); handle_list_head(par_indented)
1012 return cleanup(mode)
1014 lp = calc_np(lp, last)
1018 local pid, pm = Np.id, Np.met
1020 if pid == id_jglyph then
1021 handle_np_jachar(mode)
1023 if pid==id_hlist then handle_np_ja_hlist()
1024 else handle_np_jachar() end
1026 if Nq.id==id_hlist then handle_nq_ja_hlist()
1027 else handle_nq_jachar() end
1029 lp = calc_np(lp, last)
1031 handle_list_tail(mode)
1032 return cleanup(mode)
1037 local IHB = luatexja.userid_table.IHB
1038 local BPAR = luatexja.userid_table.BPAR
1039 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1040 local node_write = Dnode.write
1043 function create_inhibitglue_node()
1044 local tn = node_new(id_whatsit, sid_user)
1045 setfield(tn, 'user_id', IHB)
1046 setfield(tn, 'type', 100)
1047 setfield(tn, 'value', 1)
1051 -- Node for indicating beginning of a paragraph
1052 -- (for ltjsclasses)
1053 function create_beginpar_node()
1054 local tn = node_new(id_whatsit, sid_user)
1055 setfield(tn, 'user_id', BPAR)
1056 setfield(tn, 'type', 100)
1057 setfield(tn, 'value', 1)
1061 local function whatsit_callback(Np, lp, Nq)
1062 if Np and Np.nuc then return Np
1063 elseif Np and getfield(lp, 'user_id') == BPAR then
1064 Np.first = lp; Np.nuc = lp; Np.last = lp
1067 Np.pre = 0; Np.post = 0
1069 Np.auto_xspc = false
1074 local function whatsit_after_callback(s, Nq, Np)
1075 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1076 local x, y = node_prev(Nq.nuc), Nq.nuc
1077 Nq.first, Nq.nuc, Nq.last = x, x, x
1078 head = node_remove(head, y)
1084 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1085 "luatexja.beginpar.np_info", 1)
1086 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1087 "luatexja.beginpar.np_info_after", 1)