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
15 luatexja.load_module('direction'); local ltjd = luatexja.direction
18 local Dnode = node.direct or node
20 local nullfunc = function(n) return n end
21 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
22 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
24 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
25 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
26 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
27 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
28 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
29 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
30 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
32 local has_attr = Dnode.has_attribute
33 local set_attr = Dnode.set_attribute
34 local insert_before = Dnode.insert_before
35 local insert_after = Dnode.insert_after
36 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
37 local round = tex.round
38 local ltjd_make_dir_whatsit = ltjd.make_dir_whatsit
39 local ltjf_font_metric_table = ltjf.font_metric_table
40 local ltjf_find_char_class = ltjf.find_char_class
41 local node_new = Dnode.new
42 local node_copy = Dnode.copy
43 local node_remove = luatexja.Dnode_remove -- Dnode.remove
44 local node_tail = Dnode.tail
45 local node_free = Dnode.free
46 local node_end_of_math = Dnode.end_of_math
48 local id_glyph = node.id('glyph')
49 local id_hlist = node.id('hlist')
50 local id_vlist = node.id('vlist')
51 local id_rule = node.id('rule')
52 local id_ins = node.id('ins')
53 local id_mark = node.id('mark')
54 local id_adjust = node.id('adjust')
55 local id_disc = node.id('disc')
56 local id_whatsit = node.id('whatsit')
57 local id_math = node.id('math')
58 local id_glue = node.id('glue')
59 local id_kern = node.id('kern')
60 local id_penalty = node.id('penalty')
62 local id_glue_spec = node.id('glue_spec')
63 local id_jglyph = 512 -- Japanese character
64 local id_box_like = 256 -- vbox, shifted hbox
65 local id_pbox = 257 -- already processed nodes (by \unhbox)
66 local id_pbox_w = 258 -- cluster which consists of a whatsit
67 local sid_user = node.subtype('user_defined')
69 local sid_start_link = node.subtype('pdf_start_link')
70 local sid_start_thread = node.subtype('pdf_start_thread')
71 local sid_end_link = node.subtype('pdf_end_link')
72 local sid_end_thread = node.subtype('pdf_end_thread')
74 local ITALIC = luatexja.icflag_table.ITALIC
75 local PACKED = luatexja.icflag_table.PACKED
76 local KINSOKU = luatexja.icflag_table.KINSOKU
77 local FROM_JFM = luatexja.icflag_table.FROM_JFM
78 local PROCESSED = luatexja.icflag_table.PROCESSED
79 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
80 local BOXBDD = luatexja.icflag_table.BOXBDD
81 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
84 local table_current_stack
87 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
88 local attr_dir = luatexbase.attributes['ltj@dir']
89 local attr_icflag = luatexbase.attributes['ltj@icflag']
91 local function get_attr_icflag(p)
92 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
95 -------------------- Helper functions
97 local function copy_attr(new, old)
101 -- This function is called only for acquiring `special' characters.
102 local function fast_find_char_class(c,m)
103 return m.chars[c] or 0
107 local slow_find_char_class
109 local start_time_measure = ltjb.start_time_measure
110 local stop_time_measure = ltjb.stop_time_measure
111 slow_find_char_class = function (c, m, oc)
112 start_time_measure('slow_find_chr')
113 local cls = ltjf_find_char_class(oc, m)
114 if not c and cls==0 then
115 stop_time_measure('slow_find_chr')
116 return ltjf_find_char_class(-c, m), oc
118 stop_time_measure('slow_find_chr')
124 local zero_glue = node_new(id_glue)
125 spec_zero_glue = to_node(node_new(id_glue_spec))
126 -- must be public, since mentioned from other sources
127 local spec_zero_glue = to_direct(spec_zero_glue)
128 setfield(spec_zero_glue, 'width', 0)
129 setfield(spec_zero_glue, 'stretch', 0)
130 setfield(spec_zero_glue, 'shrink', 0)
131 setfield(spec_zero_glue, 'stretch_order', 0)
132 setfield(spec_zero_glue, 'shrink_order', 0)
133 setfield(zero_glue, 'spec', spec_zero_glue)
135 local function skip_table_to_spec(n)
136 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
137 setfield(g, 'width', st.width)
138 setfield(g, 'stretch', st.stretch)
139 setfield(g, 'shrink', st.shrink)
140 setfield(g, 'stretch_order', st.stretch_order)
141 setfield(g, 'shrink_order', st.shrink_order)
147 local function add_penalty(p,e)
148 local pp = getfield(p, 'penalty')
150 if e<=-10000 then pp = 0 end
151 elseif pp<=-10000 then
152 if e>=10000 then pp = 0 end
155 if pp>=10000 then setfield(p, 'penalty', 10000)
156 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
157 else setfield(p, 'penalty', pp) end
163 diffmet_rule = math.two_paverage
164 function math.two_add(a,b) return a+b end
165 function math.two_average(a,b) return (a+b)*0.5 end
166 function math.two_paverage(a,b) return (a+b)/2 end
167 function math.two_pleft(a,b) return a end
168 function math.two_pright(a,b) return b end
170 local head -- the head of current list
173 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
175 local ihb_flag -- JFM グルー挿入抑止用 flag
176 -- on: \inhibitglue 指定時,hlist の周囲
178 -------------------- hlist 内の文字の検索
180 local first_char, last_char, find_first_char
182 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
183 local function check_box(box_ptr, box_end)
184 local p = box_ptr; local found_visible_node = false
186 find_first_char = false; last_char = nil
189 while p and p~=box_end do
191 if pid==id_kern and getsubtype(p)==2 then
192 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
194 if pid==id_glyph then
196 if find_first_char then
197 first_char = p; find_first_char = false
199 last_char = p; found_visible_node = true; p=node_next(p)
200 if (not p) or p==box_end then
201 return found_visible_node
203 until getid(p)~=id_glyph
204 pid = getid(p) -- p must be non-nil
207 local pa = get_attr_icflag(p)
208 --if pa==IC_PROCESSED or pa == PACKED then
209 if pa==IC_PROCESSED then
211 elseif getsubtype(p)==2 then
212 p = node_next(node_next(p));
213 -- Note that another node_next will be executed outside this if-statement.
215 found_visible_node = true
216 find_first_char = false; last_char = nil
218 elseif pid==id_hlist then
219 if PACKED == get_attr_icflag(p) then
220 local s = ltjd_glyph_from_packed(p)
221 if find_first_char then
222 first_char = s; find_first_char = false
224 last_char = s; found_visible_node = true
226 if getfield(p, 'shift')==0 then
227 if check_box(getlist(p), nil) then found_visible_node = true end
229 find_first_char = false; last_char = nil
232 elseif pid==id_math then
233 if find_first_char then
234 first_char = p; find_first_char = false
236 last_char = p; found_visible_node = true
237 --elseif pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
238 elseif not (pid==id_ins or pid==id_mark
239 or pid==id_adjust or pid==id_whatsit
240 or pid==id_penalty) then
241 found_visible_node = true
242 find_first_char = false; last_char = nil
246 return found_visible_node
249 function check_box_high(Nx, box_ptr, box_end)
250 first_char = nil; last_char = nil; find_first_char = true
251 if check_box(box_ptr, box_end) then
252 local first_char = first_char
254 if getid(first_char)==id_glyph then
255 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
256 set_np_xspc_jachar(Nx, first_char)
258 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
261 set_np_xspc_alchar(Nx, -1,first_char)
268 -------------------- Np の計算と情報取得
270 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
271 function (Np, lp, Nq)
272 if Np.nuc then return Np
274 return Np -- your code
277 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
278 function (stat, Nq, Np) return false end)
283 local function set_attr_icflag_processed(p)
284 if get_attr_icflag(p)<= ITALIC then
285 set_attr(p, attr_icflag, PROCESSED)
289 local function check_next_ickern(lp)
290 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
291 set_attr(lp, attr_icflag, IC_PROCESSED)
292 Np.last = lp; return node_next(lp)
294 Np.last = Np.nuc; return lp
298 local function calc_np_pbox(lp, last)
299 Np.first = Np.first or lp; Np.id = id_pbox
300 local lpa, nc = KINSOKU, nil
301 set_attr(lp, attr_icflag, get_attr_icflag(lp));
302 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
303 if getid(lp)==id_hlist or getid(lp)==id_vlist then
304 head, lp, nc = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm pbox')
306 nc, lp = lp, node_next(lp)
308 lpa = lp and has_attr(lp, attr_icflag) or 0
309 -- get_attr_icflag() ではいけない!
312 return check_next_ickern(lp)
316 local calc_np_auxtable = {
317 [id_glyph] = function (lp)
318 Np.first, Np.nuc = (Np.first or lp), lp;
319 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
320 and id_jglyph or id_glyph
321 return true, check_next_ickern(node_next(lp));
323 [id_hlist] = function(lp)
325 head, lp, op, flag = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm hlist')
326 set_attr(op, attr_icflag, PROCESSED)
327 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
328 Np.id = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
331 [id_vlist] = function(lp)
333 head, lp, op = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm:' .. getid(lp))
334 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
338 box_like = function(lp)
339 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
341 return true, node_next(lp)
344 set_attr(lp, attr_icflag, PROCESSED)
345 return false, node_next(lp)
347 [id_whatsit] = function(lp)
348 local lps = getsubtype(lp)
349 if lps==sid_user then
350 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
351 local lq = node_next(lp);
352 head = node_remove(head, lp); node_free(lp); ihb_flag = true
355 set_attr(lp, attr_icflag, PROCESSED)
356 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
359 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
360 return true, node_next(lp)
362 return false, node_next(lp)
366 -- we do special treatment for these whatsit nodes.
367 if lps == sid_start_link or lps == sid_start_thread then
369 elseif lps == sid_end_link or lps == sid_end_thread then
370 Np.first, Nq.last = nil, lp;
372 set_attr(lp, attr_icflag, PROCESSED)
373 return false, node_next(lp)
376 [id_math] = function(lp)
377 Np.first, Np.nuc = (Np.first or lp), lp;
378 set_attr(lp, attr_icflag, PROCESSED)
379 lp = node_end_of_math(lp)
380 set_attr(lp, attr_icflag, PROCESSED)
381 Np.last, Np.id = lp, id_math;
382 return true, node_next(lp);
384 discglue = function(lp)
385 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
386 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
387 return true, node_next(lp)
389 [id_kern] = function(lp)
390 Np.first = Np.first or lp
391 if getsubtype(lp)==2 then
392 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
393 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
394 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
395 set_attr(lp, attr_icflag, PROCESSED); Np.nuc = lp
396 Np.id = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) and id_jglyph or id_glyph
397 return true, check_next_ickern(node_next(lp));
399 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
400 Np.last = lp; return true, node_next(lp)
403 [id_penalty] = function(lp)
404 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
405 return false, node_next(lp)
408 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
409 calc_np_auxtable[13] = calc_np_auxtable.box_like
410 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
411 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
412 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
413 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
414 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
416 function calc_np(lp, last)
418 -- We assume lp = node_next(Np.last)
419 Np, Nq, ihb_flag = Nq, Np, nil
420 -- We clear `predefined' entries of Np before pairs() loop,
421 -- because using only pairs() loop is slower.
422 Np.post, Np.pre, Np.xspc = nil, nil, nil
423 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
424 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
425 for k in pairs(Np) do Np[k] = nil end
427 for k = 1,#Bp do Bp[k] = nil end
429 local lpa = has_attr(lp, attr_icflag) or 0
432 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
433 local lq = node_next(lp)
434 head = node_remove(head, lp); node_free(lp); lp = lq
435 else return calc_np_pbox(lp, last)
438 k, lp = calc_np_auxtable[getid(lp)](lp)
439 if k then return lp end
446 local calc_np = calc_np
448 -- extract informations from Np
449 -- We think that "Np is a Japanese character" if Np.met~=nil,
450 -- "Np is an alphabetic character" if Np.pre~=nil,
451 -- "Np is not a character" otherwise.
452 after_hlist = nil -- global
453 local after_alchar, extract_np
455 local PRE = luatexja.stack_table_index.PRE
456 local POST = luatexja.stack_table_index.POST
457 local KCAT = luatexja.stack_table_index.KCAT
458 local XSP = luatexja.stack_table_index.XSP
459 local dir_tate = luatexja.dir_table.dir_tate
462 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
463 local attr_orig_char = luatexbase.attributes['ltj@origchar']
464 local attr_autospc = luatexbase.attributes['ltj@autospc']
465 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
466 function set_np_xspc_jachar(Nx, x)
467 local m = ltjf_font_metric_table[getfont(x)]
469 if list_dir == dir_tate then
470 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
471 c = has_attr(x, attr_dir) or c1 or c2
472 cls = ltjf_find_char_class(c, m)
473 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
475 cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
477 Nx.met, Nx.char = m, c; Nx.class = cls;
478 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
479 Nx.pre = table_current_stack[PRE + c] or 0
480 Nx.post = table_current_stack[POST + c] or 0
481 Nx.xspc = table_current_stack[XSP + c] or 3
482 Nx.kcat = table_current_stack[KCAT + c] or 0
483 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
485 local set_np_xspc_jachar = set_np_xspc_jachar
488 local floor = math.floor
489 function set_np_xspc_alchar(Nx, c,x, lig)
491 local f = (lig ==1) and nullfunc or node_tail
492 local xc, xs = getfield(x, 'components'), getsubtype(x)
493 while xc and xs and xs%4>=2 do
494 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
497 Nx.pre = table_current_stack[PRE + c] or 0
498 Nx.post = table_current_stack[POST + c] or 0
499 Nx.xspc = table_current_stack[XSP + c] or 3
502 Nx.pre, Nx.post, Nx.char = 0, 0, -1
503 Nx.xspc = table_current_stack[XSP - 1] or 3
506 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
508 local set_np_xspc_alchar = set_np_xspc_alchar
511 extract_np = function ()
512 local x, i = Np.nuc, Np.id;
513 if i == id_jglyph then return set_np_xspc_jachar(Np, x)
514 elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
515 elseif i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
516 elseif i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
517 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
518 elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
522 -- change the information for the next loop
523 -- (will be done if Nx is an alphabetic character or a hlist)
524 after_hlist = function (Nx)
525 local s = Nx.last_char
527 if getid(s)==id_glyph then
528 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
529 set_np_xspc_jachar(Nx, s)
531 set_np_xspc_alchar(Nx, getchar(s), s, 2)
534 set_np_xspc_alchar(Nx, -1, s)
537 Nx.pre, Nx.met = nil, nil
541 after_alchar = function (Nx)
543 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
548 -------------------- 最下層の処理
550 -- change penalties (or create a new penalty, if needed)
551 local function handle_penalty_normal(post, pre, g)
552 local a = (pre or 0) + (post or 0)
554 if (a~=0 and not(g and getid(g)==id_kern)) then
555 local p = node_new(id_penalty)
556 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
557 setfield(p, 'penalty', a)
558 head = insert_before(head, Np.first, p)
560 set_attr(p, attr_icflag, KINSOKU)
562 else for _, v in pairs(Bp) do add_penalty(v,a) end
566 local function handle_penalty_always(post, pre, g)
567 local a = (pre or 0) + (post or 0)
569 if not (g and getid(g)==id_glue) then
570 local p = node_new(id_penalty)
571 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
572 setfield(p, 'penalty', a)
573 head = insert_before(head, Np.first, p)
575 set_attr(p, attr_icflag, KINSOKU)
577 else for _, v in pairs(Bp) do add_penalty(v,a) end
581 local function handle_penalty_suppress(post, pre, g)
582 local a = (pre or 0) + (post or 0)
584 if g and getid(g)==id_glue then
585 local p = node_new(id_penalty)
586 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
588 set_attr(p, attr_icflag, KINSOKU)
590 else for _, v in pairs(Bp) do add_penalty(v,a) end
594 -- 和文文字間の JFM glue を node 化
595 local function new_jfm_glue(m, bc, ac)
596 -- bc, ac: char classes
597 local g, d = m.char_type[bc][ac], 0
600 n,d = node_copy(g[2]), g[3]
602 local f = node_new(id_glue)
603 set_attr(f, attr_icflag, g[4])
604 setfield(f, 'spec', n)
611 -- Nq.last (kern w) .... (glue/kern g) Np.first
612 local function real_insert(g)
614 head = insert_before(head, Np.first, g)
620 -------------------- 和文文字間空白量の決定
624 local get_kanjiskip_normal, get_kanjiskip_jfm
626 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
627 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
628 get_kanjiskip_normal = function ()
629 if Np.auto_kspc or Nq.auto_kspc then
630 return node_copy(kanji_skip)
632 local g = node_copy(zero_glue)
633 set_attr(g, attr_icflag, KANJI_SKIP)
638 get_kanjiskip_jfm = function ()
640 if Np.auto_kspc or Nq.auto_kspc then
641 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
642 local gx = node_new(id_glue_spec);
643 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
644 local pm, qm = Np.met, Nq.met
645 local bk = qm.kanjiskip or {0, 0, 0}
646 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
647 setfield(gx, 'width', bk[1])
648 setfield(gx, 'stretch', bk[2])
649 setfield(gx, 'shrink', bk[3])
651 local ak = pm.kanjiskip or {0, 0, 0}
652 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
653 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
654 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
656 setfield(g, 'spec', gx)
658 g = node_copy(zero_glue)
660 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
667 local bg_ag = 2*id_glue - id_glue
668 local bg_ak = 2*id_glue - id_kern
669 local bk_ag = 2*id_kern - id_glue
670 local bk_ak = 2*id_kern - id_kern
672 calc_ja_ja_aux = function (gb,ga, db, da)
673 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
674 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
675 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
676 and diffmet_rule ~= math.two_paverage then
677 rbb, rab, rba, raa = 1,0,0,1
681 gb = node_new(id_kern); setfield(gb, 'kern', 0)
684 ga = node_new(id_kern); setfield(ga, 'kern', 0)
687 local k = 2*getid(gb) - getid(ga)
689 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
691 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
692 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
693 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
694 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
695 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
696 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
699 elseif k == bk_ak then
701 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
702 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
705 elseif k == bk_ag then
706 local as = getfield(ga, 'spec')
707 -- gb: kern, ga: glue
708 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
709 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
710 ad = getfield(as, 'stretch')
711 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
712 ad = getfield(as, 'shrink')
713 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
717 local bs = getfield(gb, 'spec')
718 -- gb: glue, ga: kern
719 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
720 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
721 bd = getfield(bs, 'stretch')
722 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
723 bd = getfield(bs, 'shrink')
724 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
731 local function calc_ja_ja_glue()
732 if ihb_flag then return nil
734 local qm, pm = Nq.met, Np.met
735 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
736 return new_jfm_glue(qm, Nq.class, Np.class)
738 local npn, nqn = Np.nuc, Nq.nuc
739 local gb, db = new_jfm_glue(qm, Nq.class,
740 slow_find_char_class(has_attr(npn, attr_orig_char),
742 local ga, da = new_jfm_glue(pm,
743 slow_find_char_class(has_attr(nqn, attr_orig_char),
746 return calc_ja_ja_aux(gb, ga, db, da);
751 -------------------- 和欧文間空白量の決定
755 local get_xkanjiskip_normal, get_xkanjiskip_jfm
757 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
758 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
759 get_xkanjiskip_normal = function (Nn)
760 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
761 local f = node_copy(xkanji_skip)
764 local g = node_copy(zero_glue)
765 set_attr(g, attr_icflag, XKANJI_SKIP)
769 get_xkanjiskip_jfm = function (Nn)
771 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
772 g = node_new(id_glue)
773 local gx = node_new(id_glue_spec);
774 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
775 local bk = Nn.met.xkanjiskip or {0, 0, 0}
776 setfield(gx, 'width', bk[1])
777 setfield(gx, 'stretch', bk[2])
778 setfield(gx, 'shrink', bk[3])
779 setfield(g, 'spec', gx)
781 g = node_copy(zero_glue)
783 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
788 -------------------- 隣接した「塊」間の処理
790 local function get_OA_skip()
793 return new_jfm_glue(pm,
794 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
798 local function get_OB_skip()
801 return new_jfm_glue(qm, Nq.class,
802 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
807 -- (anything) .. jachar
808 local function handle_np_jachar(mode)
810 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
811 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
812 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
813 elseif Nq.met then -- qid==id_hlist
814 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
815 handle_penalty_normal(0, Np.pre, g); real_insert(g)
817 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
818 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
820 local g = get_OA_skip() -- O_A
821 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
822 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
823 else handle_penalty_always(0, Np.pre, g)
827 if mode and Np.kcat%2~=1 then
828 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
833 -- jachar .. (anything)
834 local function handle_nq_jachar()
836 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
837 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
839 local g = get_OB_skip() -- O_B
840 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
841 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
842 else handle_penalty_always(Nq.post, 0, g)
848 -- (anything) .. (和文文字で始まる hlist)
849 local function handle_np_ja_hlist()
851 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
852 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
853 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
854 elseif Nq.met then -- Nq.id==id_hlist
855 local g = get_kanjiskip() -- K
856 handle_penalty_suppress(0, 0, g); real_insert(g)
858 local g = get_xkanjiskip(Np) -- X
859 handle_penalty_suppress(0, 0, g); real_insert(g)
863 -- (和文文字で終わる hlist) .. (anything)
864 local function handle_nq_ja_hlist()
866 local g = get_xkanjiskip(Nq) -- X
867 handle_penalty_suppress(0, 0, g); real_insert(g)
872 -- Nq が前側のクラスタとなることによる修正
874 local adjust_nq_aux = {
875 [id_glyph] = function()
877 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
878 end, -- after_alchar(Nq)
879 [id_hlist] = function() after_hlist(Nq) end,
880 [id_pbox] = function() after_hlist(Nq) end,
881 [id_disc] = function() after_hlist(Nq) end,
882 [id_pbox_w] = function()
883 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
889 local x = adjust_nq_aux[Nq.id]
895 -------------------- 開始・終了時の処理
899 local JWP = luatexja.stack_table_index.JWP
900 local function handle_list_tail(mode)
903 -- the current list is to be line-breaked.
904 -- Insert \jcharwidowpenalty
905 Bp = widow_Bp; Np = widow_Np
907 handle_penalty_normal(0,
908 table_current_stack[JWP] or 0)
911 -- the current list is the contents of a hbox
912 local npi, pm = Np.id, Np.met
913 if npi == id_jglyph or (npi==id_pbox and pm) then
914 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
916 set_attr(g, attr_icflag, BOXBDD)
917 head = insert_after(head, Np.last, g)
924 local function handle_list_head(par_indented)
925 local npi, pm = Np.id, Np.met
926 if npi == id_jglyph or (npi==id_pbox and pm) then
928 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
930 set_attr(g, attr_icflag, BOXBDD)
931 if getid(g)==id_glue and #Bp==0 then
932 local h = node_new(id_penalty)
933 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
935 head = insert_before(head, Np.first, g)
942 -- return value: (the initial cursor lp), (last node)
945 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
946 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
947 local KSK = luatexja.stack_table_index.KSK
948 local XSK = luatexja.stack_table_index.XSK
949 local dir_yoko = luatexja.dir_table.dir_yoko
950 init_var = function (mode)
951 -- 1073741823: max_dimen
952 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
953 table_current_stack = ltjs.table_current_stack
955 list_dir = ltjs.list_dir or dir_yoko
956 kanji_skip = node_new(id_glue)
957 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
958 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
959 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
960 and get_kanjiskip_jfm or get_kanjiskip_normal
962 xkanji_skip = node_new(id_glue)
963 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
964 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
965 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
966 and get_xkanjiskip_jfm or get_xkanjiskip_normal
969 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
970 first=nil, id=nil, last=nil, met=nil, nuc=nil,
971 post=nil, pre=nil, xspc=nil,
974 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
975 first=nil, id=nil, last=nil, met=nil, nuc=nil,
976 post=nil, pre=nil, xspc=nil,
979 -- the current list is to be line-breaked:
980 -- hbox from \parindent is skipped.
981 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
982 while lp and ((lpi==id_whatsit and lps~=sid_user)
983 or ((lpi==id_hlist) and (lps==3))) do
984 if (lpi==id_hlist) and (lps==3) then
985 Np.char, par_indented = 'parbdd', 'parbdd'
986 Np.width = getfield(lp, 'width')
988 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
989 return lp, node_tail(head), par_indented
991 return head, nil, 'boxbdd'
996 local function cleanup(mode)
997 -- adjust attr_icflag for avoiding error
998 tex.setattribute('global', attr_icflag, 0)
999 node_free(kanji_skip); node_free(xkanji_skip)
1001 local h = node_next(head)
1002 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
1004 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
1011 -------------------- 外部から呼ばれる関数
1014 function main(ahead, mode)
1015 if not ahead then return ahead end
1017 local lp, last, par_indented = init_var(mode)
1018 lp = calc_np(lp, last)
1020 extract_np(); handle_list_head(par_indented)
1022 return cleanup(mode)
1024 lp = calc_np(lp, last)
1028 local pid, pm = Np.id, Np.met
1030 if pid == id_jglyph then
1031 handle_np_jachar(mode)
1033 if pid==id_hlist then handle_np_ja_hlist()
1034 else handle_np_jachar() end
1036 if Nq.id==id_hlist then handle_nq_ja_hlist()
1037 else handle_nq_jachar() end
1039 lp = calc_np(lp, last)
1041 handle_list_tail(mode)
1042 return cleanup(mode)
1047 local IHB = luatexja.userid_table.IHB
1048 local BPAR = luatexja.userid_table.BPAR
1049 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1050 local node_write = Dnode.write
1053 function create_inhibitglue_node()
1054 local tn = node_new(id_whatsit, sid_user)
1055 setfield(tn, 'user_id', IHB)
1056 setfield(tn, 'type', 100)
1057 setfield(tn, 'value', 1)
1061 -- Node for indicating beginning of a paragraph
1062 -- (for ltjsclasses)
1063 function create_beginpar_node()
1064 local tn = node_new(id_whatsit, sid_user)
1065 setfield(tn, 'user_id', BPAR)
1066 setfield(tn, 'type', 100)
1067 setfield(tn, 'value', 1)
1071 local function whatsit_callback(Np, lp, Nq)
1072 if Np and Np.nuc then return Np
1073 elseif Np and getfield(lp, 'user_id') == BPAR then
1074 Np.first = lp; Np.nuc = lp; Np.last = lp
1077 Np.pre = 0; Np.post = 0
1079 Np.auto_xspc = false
1084 local function whatsit_after_callback(s, Nq, Np)
1085 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1086 local x, y = node_prev(Nq.nuc), Nq.nuc
1087 Nq.first, Nq.nuc, Nq.last = x, x, x
1088 head = node_remove(head, y)
1094 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1095 "luatexja.beginpar.np_info", 1)
1096 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1097 "luatexja.beginpar.np_info_after", 1)