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
16 luatexja.load_module('setwidth'); local ltjw = luatexja.setwidth
19 local Dnode = node.direct or node
21 local nullfunc = function(n) return n end
22 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
23 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
25 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
26 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
27 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
28 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
29 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
30 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
31 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
33 local has_attr = Dnode.has_attribute
34 local set_attr = Dnode.set_attribute
35 local insert_before = Dnode.insert_before
36 local insert_after = Dnode.insert_after
37 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
38 local round = tex.round
39 local ltjd_make_dir_whatsit = ltjd.make_dir_whatsit
40 local ltjf_font_metric_table = ltjf.font_metric_table
41 local ltjf_find_char_class = ltjf.find_char_class
42 local node_new = Dnode.new
43 local node_copy = Dnode.copy
44 local node_remove = Dnode.remove
45 local node_tail = Dnode.tail
46 local node_free = Dnode.free
47 local node_end_of_math = Dnode.end_of_math
49 local id_glyph = node.id('glyph')
50 local id_hlist = node.id('hlist')
51 local id_vlist = node.id('vlist')
52 local id_rule = node.id('rule')
53 local id_ins = node.id('ins')
54 local id_mark = node.id('mark')
55 local id_adjust = node.id('adjust')
56 local id_disc = node.id('disc')
57 local id_whatsit = node.id('whatsit')
58 local id_math = node.id('math')
59 local id_glue = node.id('glue')
60 local id_kern = node.id('kern')
61 local id_penalty = node.id('penalty')
63 local id_glue_spec = node.id('glue_spec')
64 local id_jglyph = 512 -- Japanese character
65 local id_box_like = 256 -- vbox, shifted hbox
66 local id_pbox = 257 -- already processed nodes (by \unhbox)
67 local id_pbox_w = 258 -- cluster which consists of a whatsit
68 local sid_user = node.subtype('user_defined')
70 local sid_start_link = node.subtype('pdf_start_link')
71 local sid_start_thread = node.subtype('pdf_start_thread')
72 local sid_end_link = node.subtype('pdf_end_link')
73 local sid_end_thread = node.subtype('pdf_end_thread')
75 local ITALIC = luatexja.icflag_table.ITALIC
76 local PACKED = luatexja.icflag_table.PACKED
77 local KINSOKU = luatexja.icflag_table.KINSOKU
78 local FROM_JFM = luatexja.icflag_table.FROM_JFM
79 local PROCESSED = luatexja.icflag_table.PROCESSED
80 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
81 local BOXBDD = luatexja.icflag_table.BOXBDD
82 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
85 local table_current_stack
90 local set_np_xspc_jachar
92 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
93 local attr_dir = luatexbase.attributes['ltj@dir']
94 local attr_icflag = luatexbase.attributes['ltj@icflag']
96 local function get_attr_icflag(p)
97 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
100 -------------------- Helper functions
102 local function copy_attr(new, old)
103 -- 仕様が決まるまで off にしておく
106 -- This function is called only for acquiring `special' characters.
107 local function fast_find_char_class(c,m)
108 return m.chars[c] or 0
112 local slow_find_char_class
114 local start_time_measure = ltjb.start_time_measure
115 local stop_time_measure = ltjb.stop_time_measure
116 slow_find_char_class = function (c, m, oc)
117 local cls = ltjf_find_char_class(oc, m)
118 if oc~=c and cls==0 then
119 return ltjf_find_char_class(-c, m), oc
126 local zero_glue = node_new(id_glue)
127 spec_zero_glue = to_node(node_new(id_glue_spec))
128 -- must be public, since mentioned from other sources
129 local spec_zero_glue = to_direct(spec_zero_glue)
130 setfield(spec_zero_glue, 'width', 0)
131 setfield(spec_zero_glue, 'stretch', 0)
132 setfield(spec_zero_glue, 'shrink', 0)
133 setfield(spec_zero_glue, 'stretch_order', 0)
134 setfield(spec_zero_glue, 'shrink_order', 0)
135 setfield(zero_glue, 'spec', spec_zero_glue)
137 local function skip_table_to_spec(n)
138 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
139 setfield(g, 'width', st.width)
140 setfield(g, 'stretch', st.stretch)
141 setfield(g, 'shrink', st.shrink)
142 setfield(g, 'stretch_order', st.stretch_order)
143 setfield(g, 'shrink_order', st.shrink_order)
149 local function add_penalty(p,e)
150 local pp = getfield(p, 'penalty')
152 if e<=-10000 then pp = 0 end
153 elseif pp<=-10000 then
154 if e>=10000 then pp = 0 end
157 if pp>=10000 then setfield(p, 'penalty', 10000)
158 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
159 else setfield(p, 'penalty', pp) end
165 diffmet_rule = math.two_paverage
166 function math.two_add(a,b) return a+b end
167 function math.two_average(a,b) return (a+b)*0.5 end
168 function math.two_paverage(a,b) return (a+b)/2 end
169 function math.two_pleft(a,b) return a end
170 function math.two_pright(a,b) return b end
172 local head -- the head of current list
175 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
177 local ihb_flag -- JFM グルー挿入抑止用 flag
178 -- on: \inhibitglue 指定時,hlist の周囲
180 -------------------- hlist 内の文字の検索
182 local first_char, last_char, find_first_char
184 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
185 local function check_box(box_ptr, box_end)
186 local p = box_ptr; local found_visible_node = false
188 find_first_char = false; last_char = nil
191 while p and p~=box_end do
193 if pid==id_kern and getsubtype(p)==2 then
194 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
196 if pid==id_glyph then
198 if find_first_char then
199 first_char = p; find_first_char = false
201 last_char = p; found_visible_node = true; p=node_next(p)
202 if (not p) or p==box_end then
203 return found_visible_node
205 until getid(p)~=id_glyph
206 pid = getid(p) -- p must be non-nil
209 local pa = get_attr_icflag(p)
210 if pa==IC_PROCESSED then
212 elseif getsubtype(p)==2 then
213 p = node_next(node_next(p));
214 -- Note that another node_next will be executed outside this if-statement.
216 found_visible_node = true
217 find_first_char = false; last_char = nil
219 elseif pid==id_hlist then
220 if PACKED == get_attr_icflag(p) then
221 local s = ltjd_glyph_from_packed(p)
222 if find_first_char then
223 first_char = s; find_first_char = false
225 last_char = s; found_visible_node = true
227 if getfield(p, 'shift')==0 then
228 if check_box(getlist(p), nil) then found_visible_node = true end
230 find_first_char = false; last_char = nil
233 elseif pid==id_math then
234 if find_first_char then
235 first_char = p; find_first_char = false
237 last_char = p; found_visible_node = true
238 --elseif pid==id_rule and get_attr_icflag(p)==PACKED then -- do nothing
239 elseif not (pid==id_ins or pid==id_mark
240 or pid==id_adjust or pid==id_whatsit
241 or pid==id_penalty) then
242 found_visible_node = true
243 find_first_char = false; last_char = nil
247 return found_visible_node
250 function check_box_high(Nx, box_ptr, box_end)
251 first_char = nil; last_char = nil; find_first_char = true
252 if check_box(box_ptr, box_end) then
253 local first_char = first_char
255 if getid(first_char)==id_glyph then
256 if getfont(first_char) == (has_attr(first_char, attr_curjfnt) or -1) then
257 set_np_xspc_jachar(Nx, first_char)
259 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
262 set_np_xspc_alchar(Nx, -1,first_char)
269 -------------------- Np の計算と情報取得
271 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
272 function (Np, lp, Nq)
273 if Np.nuc then return Np
275 return Np -- your code
278 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
279 function (stat, Nq, Np) return false end)
284 local function set_attr_icflag_processed(p)
285 if get_attr_icflag(p)<= ITALIC then
286 set_attr(p, attr_icflag, PROCESSED)
290 local function check_next_ickern(lp)
291 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
292 set_attr(lp, attr_icflag, IC_PROCESSED)
293 Np.last = lp; return node_next(lp)
295 Np.last = Np.nuc; return lp
299 local function calc_np_pbox(lp, last)
300 local first, lpa, nc = (not Np.first), KINSOKU, nil
301 Np.first = Np.first or lp; Np.id = id_pbox
302 set_attr(lp, attr_icflag, get_attr_icflag(lp));
303 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
304 if getid(lp)==id_hlist or getid(lp)==id_vlist then
305 head, lp, nc = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm pbox')
306 if first then Np.first = nc end
308 nc, lp = lp, node_next(lp)
310 first, lpa = false, (lp and has_attr(lp, attr_icflag) or 0)
311 -- get_attr_icflag() ではいけない!
314 return check_next_ickern(lp)
317 local ltjw_apply_ashift_math = ltjw.apply_ashift_math
318 local function calc_np_aux_glyph_common(lp)
321 if (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1)) then
323 set_np_xspc_jachar(Np, lp)
325 lp, head, npi = capsule_glyph(lp, Np.met, Np.class, head, tex_dir)
326 Np.first = (Np.first~=Np.nuc) and Np.first or npi
330 set_np_xspc_alchar(Np, getchar(lp), lp, 1)
331 set_attr(lp, attr_icflag, PROCESSED)
332 setfield(lp, 'yoffset',
333 getfield(lp, 'yoffset') - (has_attr(lp,attr_ablshift) or 0))
336 return true, check_next_ickern(lp);
338 local calc_np_auxtable = {
339 [id_glyph] = function (lp)
340 Np.first= (Np.first or lp)
341 return calc_np_aux_glyph_common(lp)
343 [id_hlist] = function(lp)
345 head, lp, op, flag = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm hlist')
346 set_attr(op, attr_icflag, PROCESSED)
347 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
348 if (flag or getfield(op, 'shift')~=0) then
352 Np.last_char = check_box_high(Np, getlist(op), nil)
356 [id_vlist] = function(lp)
358 head, lp, op = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm:' .. getid(lp))
359 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
363 box_like = function(lp)
364 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
366 return true, node_next(lp)
369 set_attr(lp, attr_icflag, PROCESSED)
370 return false, node_next(lp)
372 [id_whatsit] = function(lp)
373 local lps = getsubtype(lp)
374 if lps==sid_user then
375 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
376 local lq = node_next(lp);
377 head = node_remove(head, lp); node_free(lp); ihb_flag = true
380 set_attr(lp, attr_icflag, PROCESSED)
381 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
384 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
385 return true, node_next(lp)
387 return false, node_next(lp)
391 -- we do special treatment for these whatsit nodes.
392 if lps == sid_start_link or lps == sid_start_thread then
394 elseif lps == sid_end_link or lps == sid_end_thread then
395 Np.first, Nq.last = nil, lp;
397 set_attr(lp, attr_icflag, PROCESSED)
398 return false, node_next(lp)
401 [id_math] = function(lp)
402 Np.first, Np.nuc = (Np.first or lp), lp;
403 set_attr(lp, attr_icflag, PROCESSED)
404 set_np_xspc_alchar(Np, -1, lp)
405 local end_math = node_end_of_math(lp)
406 ltjw_apply_ashift_math(lp, end_math, attr_ablshift)
407 set_attr(end_math, attr_icflag, PROCESSED)
408 Np.last, Np.id = end_math, id_math;
409 return true, node_next(end_math);
411 discglue = function(lp)
412 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
413 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
414 return true, node_next(lp)
416 [id_kern] = function(lp)
417 Np.first = Np.first or lp
418 if getsubtype(lp)==2 then
419 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
420 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
421 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
422 set_attr(lp, attr_icflag, PROCESSED);
423 return calc_np_aux_glyph_common(lp)
425 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
426 Np.last = lp; return true, node_next(lp)
429 [id_penalty] = function(lp)
430 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
431 return false, node_next(lp)
434 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
435 calc_np_auxtable[13] = calc_np_auxtable.box_like
436 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
437 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
438 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
439 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
440 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
442 function calc_np(lp, last)
444 -- We assume lp = node_next(Np.last)
445 Np, Nq, ihb_flag = Nq, Np, nil
446 -- We clear `predefined' entries of Np before pairs() loop,
447 -- because using only pairs() loop is slower.
448 Np.post, Np.pre, Np.xspc = nil, nil, nil
449 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
450 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
451 for k in pairs(Np) do Np[k] = nil end
453 for k = 1,#Bp do Bp[k] = nil end
455 local lpa = has_attr(lp, attr_icflag) or 0
458 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
459 local lq = node_next(lp)
460 head = node_remove(head, lp); node_free(lp); lp = lq
462 return calc_np_pbox(lp, last)
465 k, lp = calc_np_auxtable[getid(lp)](lp)
466 if k then return lp end
473 local calc_np = calc_np
475 -- extract informations from Np
476 -- We think that "Np is a Japanese character" if Np.met~=nil,
477 -- "Np is an alphabetic character" if Np.pre~=nil,
478 -- "Np is not a character" otherwise.
479 after_hlist = nil -- global
480 local after_alchar, extract_np
482 local PRE = luatexja.stack_table_index.PRE
483 local POST = luatexja.stack_table_index.POST
484 local KCAT = luatexja.stack_table_index.KCAT
485 local XSP = luatexja.stack_table_index.XSP
486 local dir_tate = luatexja.dir_table.dir_tate
489 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
490 local attr_orig_char = luatexbase.attributes['ltj@origchar']
491 local attr_autospc = luatexbase.attributes['ltj@autospc']
492 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
493 function set_np_xspc_jachar_yoko(Nx, x)
494 local m = ltjf_font_metric_table[getfont(x)]
495 local cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
496 Nx.met, Nx.char = m, c; Nx.class = cls;
497 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
498 Nx.pre = table_current_stack[PRE + c] or 0
499 Nx.post = table_current_stack[POST + c] or 0
500 Nx.xspc = table_current_stack[XSP + c] or 3
501 Nx.kcat = table_current_stack[KCAT + c] or 0
502 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
504 function set_np_xspc_jachar_tate(Nx, x)
505 local m = ltjf_font_metric_table[getfont(x)]
507 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
508 c = has_attr(x, attr_dir) or c1 or c2
509 cls = ltjf_find_char_class(c, m)
510 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
511 Nx.met, Nx.char = m, c; Nx.class = cls;
512 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
513 Nx.pre = table_current_stack[PRE + c] or 0
514 Nx.post = table_current_stack[POST + c] or 0
515 Nx.xspc = table_current_stack[XSP + c] or 3
516 Nx.kcat = table_current_stack[KCAT + c] or 0
517 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
521 local floor = math.floor
522 function set_np_xspc_alchar(Nx, c,x, lig)
524 local f = (lig ==1) and nullfunc or node_tail
525 local xc, xs = getfield(x, 'components'), getsubtype(x)
526 while xc and xs and xs%4>=2 do
527 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
530 Nx.pre = table_current_stack[PRE + c] or 0
531 Nx.post = table_current_stack[POST + c] or 0
532 Nx.xspc = table_current_stack[XSP + c] or 3
535 Nx.pre, Nx.post, Nx.char = 0, 0, -1
536 Nx.xspc = table_current_stack[XSP - 1] or 3
539 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
541 local set_np_xspc_alchar = set_np_xspc_alchar
544 extract_np = function ()
545 local x, i = Np.nuc, Np.id;
546 -- if i == id_jglyph then return set_np_xspc_jachar(Np, x)
547 -- elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
548 -- if i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
549 if i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
550 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
551 -- elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
555 -- change the information for the next loop
556 -- (will be done if Nx is an alphabetic character or a hlist)
557 after_hlist = function (Nx)
558 local s = Nx.last_char
560 if getid(s)==id_glyph then
561 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
562 set_np_xspc_jachar(Nx, s)
564 set_np_xspc_alchar(Nx, getchar(s), s, 2)
567 set_np_xspc_alchar(Nx, -1, s)
570 Nx.pre, Nx.met = nil, nil
574 after_alchar = function (Nx)
576 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
581 -------------------- 最下層の処理
583 -- change penalties (or create a new penalty, if needed)
584 local function handle_penalty_normal(post, pre, g)
585 local a = (pre or 0) + (post or 0)
587 if (a~=0 and not(g and getid(g)==id_kern)) then
588 local p = node_new(id_penalty)
589 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
590 setfield(p, 'penalty', a)
591 head = insert_before(head, Np.first, p)
593 set_attr(p, attr_icflag, KINSOKU)
595 else for _, v in pairs(Bp) do add_penalty(v,a) end
599 local function handle_penalty_always(post, pre, g)
600 local a = (pre or 0) + (post or 0)
602 if not (g and getid(g)==id_glue) or a~=0 then
603 local p = node_new(id_penalty)
604 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
605 setfield(p, 'penalty', a)
606 head = insert_before(head, Np.first, p)
608 set_attr(p, attr_icflag, KINSOKU)
610 else for _, v in pairs(Bp) do add_penalty(v,a) end
614 local function handle_penalty_suppress(post, pre, g)
615 local a = (pre or 0) + (post or 0)
617 if g and getid(g)==id_glue then
618 local p = node_new(id_penalty)
619 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
621 set_attr(p, attr_icflag, KINSOKU)
623 else for _, v in pairs(Bp) do add_penalty(v,a) end
627 -- 和文文字間の JFM glue を node 化
628 local function new_jfm_glue(m, bc, ac)
629 -- bc, ac: char classes
630 local g, d = m.char_type[bc][ac], 0
633 n,d = node_copy(g[2]), g[3]
635 local f = node_new(id_glue)
636 set_attr(f, attr_icflag, g[4])
637 setfield(f, 'spec', n)
644 -- Nq.last (kern w) .... (glue/kern g) Np.first
645 local function real_insert(g)
647 head = insert_before(head, Np.first, g)
653 -------------------- 和文文字間空白量の決定
657 local get_kanjiskip_normal, get_kanjiskip_jfm
659 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
660 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
661 get_kanjiskip_normal = function ()
662 if Np.auto_kspc or Nq.auto_kspc then
663 return node_copy(kanji_skip)
665 local g = node_copy(zero_glue)
666 set_attr(g, attr_icflag, KANJI_SKIP)
671 get_kanjiskip_jfm = function ()
673 if Np.auto_kspc or Nq.auto_kspc then
674 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
675 local gx = node_new(id_glue_spec);
676 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
677 local pm, qm = Np.met, Nq.met
678 local bk = qm.kanjiskip or {0, 0, 0}
679 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
680 setfield(gx, 'width', bk[1])
681 setfield(gx, 'stretch', bk[2])
682 setfield(gx, 'shrink', bk[3])
684 local ak = pm.kanjiskip or {0, 0, 0}
685 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
686 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
687 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
689 setfield(g, 'spec', gx)
691 g = node_copy(zero_glue)
693 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
700 local bg_ag = 2*id_glue - id_glue
701 local bg_ak = 2*id_glue - id_kern
702 local bk_ag = 2*id_kern - id_glue
703 local bk_ak = 2*id_kern - id_kern
705 calc_ja_ja_aux = function (gb,ga, db, da)
706 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
707 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
708 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
709 and diffmet_rule ~= math.two_paverage then
710 rbb, rab, rba, raa = 1,0,0,1
714 gb = node_new(id_kern); setfield(gb, 'kern', 0)
717 ga = node_new(id_kern); setfield(ga, 'kern', 0)
720 local k = 2*getid(gb) - getid(ga)
722 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
724 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
725 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
726 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
727 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
728 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
729 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
732 elseif k == bk_ak then
734 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
735 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
738 elseif k == bk_ag then
739 local as = getfield(ga, 'spec')
740 -- gb: kern, ga: glue
741 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
742 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
743 ad = getfield(as, 'stretch')
744 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
745 ad = getfield(as, 'shrink')
746 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
750 local bs = getfield(gb, 'spec')
751 -- gb: glue, ga: kern
752 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
753 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
754 bd = getfield(bs, 'stretch')
755 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
756 bd = getfield(bs, 'shrink')
757 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
764 local function calc_ja_ja_glue()
765 if ihb_flag then return nil
767 local qm, pm = Nq.met, Np.met
768 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
769 return new_jfm_glue(qm, Nq.class, Np.class)
771 local npn, nqn = Np.nuc, Nq.nuc
772 local gb, db = new_jfm_glue(qm, Nq.class,
773 slow_find_char_class(has_attr(npn, attr_orig_char),
775 local ga, da = new_jfm_glue(pm,
776 slow_find_char_class(has_attr(nqn, attr_orig_char),
779 return calc_ja_ja_aux(gb, ga, db, da);
784 -------------------- 和欧文間空白量の決定
788 local get_xkanjiskip_normal, get_xkanjiskip_jfm
790 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
791 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
792 get_xkanjiskip_normal = function (Nn)
793 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
794 local f = node_copy(xkanji_skip)
797 local g = node_copy(zero_glue)
798 set_attr(g, attr_icflag, XKANJI_SKIP)
802 get_xkanjiskip_jfm = function (Nn)
804 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
805 g = node_new(id_glue)
806 local gx = node_new(id_glue_spec);
807 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
808 local bk = Nn.met.xkanjiskip or {0, 0, 0}
809 setfield(gx, 'width', bk[1])
810 setfield(gx, 'stretch', bk[2])
811 setfield(gx, 'shrink', bk[3])
812 setfield(g, 'spec', gx)
814 g = node_copy(zero_glue)
816 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
821 -------------------- 隣接した「塊」間の処理
823 local function get_OA_skip()
826 return new_jfm_glue(pm,
827 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
831 local function get_OB_skip()
834 return new_jfm_glue(qm, Nq.class,
835 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
840 -- (anything) .. jachar
841 local function handle_np_jachar(mode)
843 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
844 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
845 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
846 elseif Nq.met then -- qid==id_hlist
847 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
848 handle_penalty_normal(0, Np.pre, g); real_insert(g)
850 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
851 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
853 local g = get_OA_skip() -- O_A
854 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
855 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
856 else handle_penalty_always(0, Np.pre, g)
860 if mode and Np.kcat%2~=1 then
861 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
866 -- jachar .. (anything)
867 local function handle_nq_jachar()
869 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
870 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
872 local g = get_OB_skip() -- O_B
873 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
874 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
875 else handle_penalty_always(Nq.post, 0, g)
881 -- (anything) .. (和文文字で始まる hlist)
882 local function handle_np_ja_hlist()
884 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
885 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
886 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
887 elseif Nq.met then -- Nq.id==id_hlist
888 local g = get_kanjiskip() -- K
889 handle_penalty_suppress(0, 0, g); real_insert(g)
891 local g = get_xkanjiskip(Np) -- X
892 handle_penalty_suppress(0, 0, g); real_insert(g)
896 -- (和文文字で終わる hlist) .. (anything)
897 local function handle_nq_ja_hlist()
899 local g = get_xkanjiskip(Nq) -- X
900 handle_penalty_suppress(0, 0, g); real_insert(g)
905 -- Nq が前側のクラスタとなることによる修正
907 local adjust_nq_aux = {
908 [id_glyph] = function()
910 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
911 end, -- after_alchar(Nq)
912 [id_hlist] = function() after_hlist(Nq) end,
913 [id_pbox] = function() after_hlist(Nq) end,
914 [id_disc] = function() after_hlist(Nq) end,
915 [id_pbox_w] = function()
916 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
922 local x = adjust_nq_aux[Nq.id]
928 -------------------- 開始・終了時の処理
932 local JWP = luatexja.stack_table_index.JWP
933 local function handle_list_tail(mode)
936 -- the current list is to be line-breaked.
937 -- Insert \jcharwidowpenalty
938 Bp = widow_Bp; Np = widow_Np
940 handle_penalty_normal(0,
941 table_current_stack[JWP] or 0)
944 -- the current list is the contents of a hbox
945 local npi, pm = Np.id, Np.met
946 if npi == id_jglyph or (npi==id_pbox and pm) then
947 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
949 set_attr(g, attr_icflag, BOXBDD)
950 head = insert_after(head, Np.last, g)
957 local function handle_list_head(par_indented)
958 local npi, pm = Np.id, Np.met
959 if npi == id_jglyph or (npi==id_pbox and pm) then
961 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
963 set_attr(g, attr_icflag, BOXBDD)
964 if getid(g)==id_glue and #Bp==0 then
965 local h = node_new(id_penalty)
966 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
968 head = insert_before(head, Np.first, g)
975 -- return value: (the initial cursor lp), (last node)
978 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
979 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
980 local KSK = luatexja.stack_table_index.KSK
981 local XSK = luatexja.stack_table_index.XSK
982 local dir_yoko = luatexja.dir_table.dir_yoko
983 local dir_tate = luatexja.dir_table.dir_tate
984 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
985 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
986 init_var = function (mode,dir)
987 -- 1073741823: max_dimen
988 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
989 table_current_stack = ltjs.table_current_stack
991 list_dir = ltjs.list_dir or dir_yoko
992 local is_dir_tate = list_dir==dir_tate
993 capsule_glyph = is_dir_tate and ltjw.capsule_glyph_tate or ltjw.capsule_glyph_yoko
994 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
995 set_np_xspc_jachar = is_dir_tate and set_np_xspc_jachar_tate or set_np_xspc_jachar_yoko
998 tex_dir = dir or 'TLT'
999 kanji_skip = node_new(id_glue)
1000 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
1001 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
1002 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
1003 and get_kanjiskip_jfm or get_kanjiskip_normal
1005 xkanji_skip = node_new(id_glue)
1006 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
1007 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
1008 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
1009 and get_xkanjiskip_jfm or get_xkanjiskip_normal
1012 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
1013 first=nil, id=nil, last=nil, met=nil, nuc=nil,
1014 post=nil, pre=nil, xspc=nil,
1017 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
1018 first=nil, id=nil, last=nil, met=nil, nuc=nil,
1019 post=nil, pre=nil, xspc=nil,
1022 -- the current list is to be line-breaked:
1023 -- hbox from \parindent is skipped.
1024 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
1025 while lp and ((lpi==id_whatsit and lps~=sid_user)
1026 or ((lpi==id_hlist) and (lps==3))) do
1027 if (lpi==id_hlist) and (lps==3) then
1028 Np.char, par_indented = 'parbdd', 'parbdd'
1029 Np.width = getfield(lp, 'width')
1031 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
1032 return lp, node_tail(head), par_indented
1034 return head, nil, 'boxbdd'
1039 local tex_set_attr = tex.setattribute
1040 local function cleanup(mode)
1041 -- adjust attr_icflag for avoiding error
1042 tex_set_attr('global', attr_icflag, 0)
1043 node_free(kanji_skip); node_free(xkanji_skip)
1045 local h = node_next(head)
1046 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
1048 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
1055 -------------------- 外部から呼ばれる関数
1058 function main(ahead, mode, dir)
1059 if not ahead then return ahead end
1061 local lp, last, par_indented = init_var(mode,dir)
1062 lp = calc_np(lp, last)
1064 extract_np(); handle_list_head(par_indented)
1066 return cleanup(mode)
1068 lp = calc_np(lp, last)
1072 local pid, pm = Np.id, Np.met
1074 if pid == id_jglyph then
1075 handle_np_jachar(mode)
1077 if pid==id_hlist then handle_np_ja_hlist()
1078 else handle_np_jachar() end
1080 if Nq.id==id_hlist then handle_nq_ja_hlist()
1081 else handle_nq_jachar() end
1083 lp = calc_np(lp, last)
1085 handle_list_tail(mode)
1086 return cleanup(mode)
1091 local IHB = luatexja.userid_table.IHB
1092 local BPAR = luatexja.userid_table.BPAR
1093 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1094 local node_write = Dnode.write
1097 function create_inhibitglue_node()
1098 local tn = node_new(id_whatsit, sid_user)
1099 setfield(tn, 'user_id', IHB)
1100 setfield(tn, 'type', 100)
1101 setfield(tn, 'value', 1)
1105 -- Node for indicating beginning of a paragraph
1106 -- (for ltjsclasses)
1107 function create_beginpar_node()
1108 local tn = node_new(id_whatsit, sid_user)
1109 setfield(tn, 'user_id', BPAR)
1110 setfield(tn, 'type', 100)
1111 setfield(tn, 'value', 1)
1115 local function whatsit_callback(Np, lp, Nq)
1116 if Np and Np.nuc then return Np
1117 elseif Np and getfield(lp, 'user_id') == BPAR then
1118 Np.first = lp; Np.nuc = lp; Np.last = lp
1121 Np.pre = 0; Np.post = 0
1123 Np.auto_xspc = false
1128 local function whatsit_after_callback(s, Nq, Np)
1129 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1130 local x, y = node_prev(Nq.nuc), Nq.nuc
1131 Nq.first, Nq.nuc, Nq.last = x, x, x
1132 head = node_remove(head, y)
1138 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1139 "luatexja.beginpar.np_info", 1)
1140 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1141 "luatexja.beginpar.np_info_after", 1)