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
88 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
89 local attr_dir = luatexbase.attributes['ltj@dir']
90 local attr_icflag = luatexbase.attributes['ltj@icflag']
92 local function get_attr_icflag(p)
93 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
96 -------------------- Helper functions
98 local function copy_attr(new, old)
102 -- This function is called only for acquiring `special' characters.
103 local function fast_find_char_class(c,m)
104 return m.chars[c] or 0
108 local slow_find_char_class
110 local start_time_measure = ltjb.start_time_measure
111 local stop_time_measure = ltjb.stop_time_measure
112 slow_find_char_class = function (c, m, oc)
113 start_time_measure('slow_find_chr')
114 local cls = ltjf_find_char_class(oc, m)
115 if not c and cls==0 then
116 stop_time_measure('slow_find_chr')
117 return ltjf_find_char_class(-c, m), oc
119 stop_time_measure('slow_find_chr')
125 local zero_glue = node_new(id_glue)
126 spec_zero_glue = to_node(node_new(id_glue_spec))
127 -- must be public, since mentioned from other sources
128 local spec_zero_glue = to_direct(spec_zero_glue)
129 setfield(spec_zero_glue, 'width', 0)
130 setfield(spec_zero_glue, 'stretch', 0)
131 setfield(spec_zero_glue, 'shrink', 0)
132 setfield(spec_zero_glue, 'stretch_order', 0)
133 setfield(spec_zero_glue, 'shrink_order', 0)
134 setfield(zero_glue, 'spec', spec_zero_glue)
136 local function skip_table_to_spec(n)
137 local g, st = node_new(id_glue_spec), ltjs.fast_get_stack_skip(n)
138 setfield(g, 'width', st.width)
139 setfield(g, 'stretch', st.stretch)
140 setfield(g, 'shrink', st.shrink)
141 setfield(g, 'stretch_order', st.stretch_order)
142 setfield(g, 'shrink_order', st.shrink_order)
148 local function add_penalty(p,e)
149 local pp = getfield(p, 'penalty')
151 if e<=-10000 then pp = 0 end
152 elseif pp<=-10000 then
153 if e>=10000 then pp = 0 end
156 if pp>=10000 then setfield(p, 'penalty', 10000)
157 elseif pp<=-10000 then setfield(p, 'penalty', -10000)
158 else setfield(p, 'penalty', pp) end
164 diffmet_rule = math.two_paverage
165 function math.two_add(a,b) return a+b end
166 function math.two_average(a,b) return (a+b)*0.5 end
167 function math.two_paverage(a,b) return (a+b)/2 end
168 function math.two_pleft(a,b) return a end
169 function math.two_pright(a,b) return b end
171 local head -- the head of current list
174 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
176 local ihb_flag -- JFM グルー挿入抑止用 flag
177 -- on: \inhibitglue 指定時,hlist の周囲
179 -------------------- hlist 内の文字の検索
181 local first_char, last_char, find_first_char
183 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
184 local function check_box(box_ptr, box_end)
185 local p = box_ptr; local found_visible_node = false
187 find_first_char = false; last_char = nil
190 while p and p~=box_end do
192 if pid==id_kern and getsubtype(p)==2 then
193 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
195 if pid==id_glyph then
197 if find_first_char then
198 first_char = p; find_first_char = false
200 last_char = p; found_visible_node = true; p=node_next(p)
201 if (not p) or p==box_end then
202 return found_visible_node
204 until getid(p)~=id_glyph
205 pid = getid(p) -- p must be non-nil
208 local pa = get_attr_icflag(p)
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 local first, lpa, nc = (not Np.first), KINSOKU, nil
300 Np.first = Np.first or lp; Np.id = id_pbox
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')
305 if first then Np.first = nc end
307 nc, lp = lp, node_next(lp)
309 first, lpa = false, (lp and has_attr(lp, attr_icflag) or 0)
310 -- get_attr_icflag() ではいけない!
313 return check_next_ickern(lp)
317 local function calc_np_aux_glyph_common(lp)
319 local npi = (getfont(lp) == (has_attr(lp, attr_curjfnt) or -1))
320 and id_jglyph or id_glyph
322 if npi==id_jglyph then
323 set_np_xspc_jachar(Np, lp)
325 set_np_xspc_alchar(Np, getchar(lp), lp, 1)
327 return true, check_next_ickern(node_next(lp));
329 local calc_np_auxtable = {
330 [id_glyph] = function (lp)
331 Np.first= (Np.first or lp)
332 return calc_np_aux_glyph_common(lp)
334 [id_hlist] = function(lp)
336 head, lp, op, flag = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm hlist')
337 set_attr(op, attr_icflag, PROCESSED)
338 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
339 local npi = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
341 if npi==id_hlist then
342 Np.last_char = check_box_high(Np, getlist(lp), nil)
346 [id_vlist] = function(lp)
348 head, lp, op = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm:' .. getid(lp))
349 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
353 box_like = function(lp)
354 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
356 return true, node_next(lp)
359 set_attr(lp, attr_icflag, PROCESSED)
360 return false, node_next(lp)
362 [id_whatsit] = function(lp)
363 local lps = getsubtype(lp)
364 if lps==sid_user then
365 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
366 local lq = node_next(lp);
367 head = node_remove(head, lp); node_free(lp); ihb_flag = true
370 set_attr(lp, attr_icflag, PROCESSED)
371 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
374 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
375 return true, node_next(lp)
377 return false, node_next(lp)
381 -- we do special treatment for these whatsit nodes.
382 if lps == sid_start_link or lps == sid_start_thread then
384 elseif lps == sid_end_link or lps == sid_end_thread then
385 Np.first, Nq.last = nil, lp;
387 set_attr(lp, attr_icflag, PROCESSED)
388 return false, node_next(lp)
391 [id_math] = function(lp)
392 Np.first, Np.nuc = (Np.first or lp), lp;
393 set_attr(lp, attr_icflag, PROCESSED)
394 set_np_xspc_alchar(Np, -1, lp)
395 lp = node_end_of_math(lp)
396 set_attr(lp, attr_icflag, PROCESSED)
397 Np.last, Np.id = lp, id_math;
398 return true, node_next(lp);
400 discglue = function(lp)
401 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
402 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
403 return true, node_next(lp)
405 [id_kern] = function(lp)
406 Np.first = Np.first or lp
407 if getsubtype(lp)==2 then
408 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
409 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
410 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
411 set_attr(lp, attr_icflag, PROCESSED);
412 return calc_np_aux_glyph_common(lp)
414 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
415 Np.last = lp; return true, node_next(lp)
418 [id_penalty] = function(lp)
419 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
420 return false, node_next(lp)
423 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
424 calc_np_auxtable[13] = calc_np_auxtable.box_like
425 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
426 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
427 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
428 calc_np_auxtable[id_disc] = calc_np_auxtable.discglue
429 calc_np_auxtable[id_glue] = calc_np_auxtable.discglue
431 function calc_np(lp, last)
433 -- We assume lp = node_next(Np.last)
434 Np, Nq, ihb_flag = Nq, Np, nil
435 -- We clear `predefined' entries of Np before pairs() loop,
436 -- because using only pairs() loop is slower.
437 Np.post, Np.pre, Np.xspc = nil, nil, nil
438 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
439 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
440 for k in pairs(Np) do Np[k] = nil end
442 for k = 1,#Bp do Bp[k] = nil end
444 local lpa = has_attr(lp, attr_icflag) or 0
447 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
448 local lq = node_next(lp)
449 head = node_remove(head, lp); node_free(lp); lp = lq
451 return calc_np_pbox(lp, last)
454 k, lp = calc_np_auxtable[getid(lp)](lp)
455 if k then return lp end
462 local calc_np = calc_np
464 -- extract informations from Np
465 -- We think that "Np is a Japanese character" if Np.met~=nil,
466 -- "Np is an alphabetic character" if Np.pre~=nil,
467 -- "Np is not a character" otherwise.
468 after_hlist = nil -- global
469 local after_alchar, extract_np
471 local PRE = luatexja.stack_table_index.PRE
472 local POST = luatexja.stack_table_index.POST
473 local KCAT = luatexja.stack_table_index.KCAT
474 local XSP = luatexja.stack_table_index.XSP
475 local dir_tate = luatexja.dir_table.dir_tate
478 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
479 local attr_orig_char = luatexbase.attributes['ltj@origchar']
480 local attr_autospc = luatexbase.attributes['ltj@autospc']
481 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
482 function set_np_xspc_jachar(Nx, x)
483 local m = ltjf_font_metric_table[getfont(x)]
485 if list_dir == dir_tate then
486 local c1, c2 = getchar(x), has_attr(x, attr_orig_char)
487 c = has_attr(x, attr_dir) or c1 or c2
488 cls = ltjf_find_char_class(c, m)
489 if cls==0 then cls = slow_find_char_class(c2, m, c1) end
491 cls, c = slow_find_char_class(has_attr(x, attr_orig_char), m, getchar(x))
493 Nx.met, Nx.char = m, c; Nx.class = cls;
494 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
495 Nx.pre = table_current_stack[PRE + c] or 0
496 Nx.post = table_current_stack[POST + c] or 0
497 Nx.xspc = table_current_stack[XSP + c] or 3
498 Nx.kcat = table_current_stack[KCAT + c] or 0
499 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
501 local set_np_xspc_jachar = set_np_xspc_jachar
504 local floor = math.floor
505 function set_np_xspc_alchar(Nx, c,x, lig)
507 local f = (lig ==1) and nullfunc or node_tail
508 local xc, xs = getfield(x, 'components'), getsubtype(x)
509 while xc and xs and xs%4>=2 do
510 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
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
518 Nx.pre, Nx.post, Nx.char = 0, 0, -1
519 Nx.xspc = table_current_stack[XSP - 1] or 3
522 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
524 local set_np_xspc_alchar = set_np_xspc_alchar
527 extract_np = function ()
528 local x, i = Np.nuc, Np.id;
529 -- if i == id_jglyph then return set_np_xspc_jachar(Np, x)
530 -- elseif i == id_glyph then return set_np_xspc_alchar(Np, getchar(x), x, 1)
531 -- if i == id_hlist then Np.last_char = check_box_high(Np, getlist(x), nil)
532 if i == id_pbox then Np.last_char = check_box_high(Np, Np.first, node_next(Np.last))
533 elseif i == id_disc then Np.last_char = check_box_high(Np, getfield(x, 'replace'), nil)
534 -- elseif i == id_math then return set_np_xspc_alchar(Np, -1, x)
538 -- change the information for the next loop
539 -- (will be done if Nx is an alphabetic character or a hlist)
540 after_hlist = function (Nx)
541 local s = Nx.last_char
543 if getid(s)==id_glyph then
544 if getfont(s) == (has_attr(s, attr_curjfnt) or -1) then
545 set_np_xspc_jachar(Nx, s)
547 set_np_xspc_alchar(Nx, getchar(s), s, 2)
550 set_np_xspc_alchar(Nx, -1, s)
553 Nx.pre, Nx.met = nil, nil
557 after_alchar = function (Nx)
559 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
564 -------------------- 最下層の処理
566 -- change penalties (or create a new penalty, if needed)
567 local function handle_penalty_normal(post, pre, g)
568 local a = (pre or 0) + (post or 0)
570 if (a~=0 and not(g and getid(g)==id_kern)) then
571 local p = node_new(id_penalty)
572 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
573 setfield(p, 'penalty', a)
574 head = insert_before(head, Np.first, p)
576 set_attr(p, attr_icflag, KINSOKU)
578 else for _, v in pairs(Bp) do add_penalty(v,a) end
582 local function handle_penalty_always(post, pre, g)
583 local a = (pre or 0) + (post or 0)
585 if not (g and getid(g)==id_glue) or a~=0 then
586 local p = node_new(id_penalty)
587 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
588 setfield(p, 'penalty', a)
589 head = insert_before(head, Np.first, p)
591 set_attr(p, attr_icflag, KINSOKU)
593 else for _, v in pairs(Bp) do add_penalty(v,a) end
597 local function handle_penalty_suppress(post, pre, g)
598 local a = (pre or 0) + (post or 0)
600 if g and getid(g)==id_glue then
601 local p = node_new(id_penalty)
602 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
604 set_attr(p, attr_icflag, KINSOKU)
606 else for _, v in pairs(Bp) do add_penalty(v,a) end
610 -- 和文文字間の JFM glue を node 化
611 local function new_jfm_glue(m, bc, ac)
612 -- bc, ac: char classes
613 local g, d = m.char_type[bc][ac], 0
616 n,d = node_copy(g[2]), g[3]
618 local f = node_new(id_glue)
619 set_attr(f, attr_icflag, g[4])
620 setfield(f, 'spec', n)
627 -- Nq.last (kern w) .... (glue/kern g) Np.first
628 local function real_insert(g)
630 head = insert_before(head, Np.first, g)
636 -------------------- 和文文字間空白量の決定
640 local get_kanjiskip_normal, get_kanjiskip_jfm
642 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
643 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
644 get_kanjiskip_normal = function ()
645 if Np.auto_kspc or Nq.auto_kspc then
646 return node_copy(kanji_skip)
648 local g = node_copy(zero_glue)
649 set_attr(g, attr_icflag, KANJI_SKIP)
654 get_kanjiskip_jfm = function ()
656 if Np.auto_kspc or Nq.auto_kspc then
657 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
658 local gx = node_new(id_glue_spec);
659 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
660 local pm, qm = Np.met, Nq.met
661 local bk = qm.kanjiskip or {0, 0, 0}
662 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
663 setfield(gx, 'width', bk[1])
664 setfield(gx, 'stretch', bk[2])
665 setfield(gx, 'shrink', bk[3])
667 local ak = pm.kanjiskip or {0, 0, 0}
668 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
669 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
670 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
672 setfield(g, 'spec', gx)
674 g = node_copy(zero_glue)
676 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
683 local bg_ag = 2*id_glue - id_glue
684 local bg_ak = 2*id_glue - id_kern
685 local bk_ag = 2*id_kern - id_glue
686 local bk_ak = 2*id_kern - id_kern
688 calc_ja_ja_aux = function (gb,ga, db, da)
689 local rbb, rab = (1-db)/2, (1-da)/2 -- 「前の文字」由来のグルーの割合
690 local rba, raa = (1+db)/2, (1+da)/2 -- 「前の文字」由来のグルーの割合
691 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
692 and diffmet_rule ~= math.two_paverage then
693 rbb, rab, rba, raa = 1,0,0,1
697 gb = node_new(id_kern); setfield(gb, 'kern', 0)
700 ga = node_new(id_kern); setfield(ga, 'kern', 0)
703 local k = 2*getid(gb) - getid(ga)
705 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
707 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
708 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
709 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
710 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
711 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
712 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
715 elseif k == bk_ak then
717 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
718 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
721 elseif k == bk_ag then
722 local as = getfield(ga, 'spec')
723 -- gb: kern, ga: glue
724 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
725 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
726 ad = getfield(as, 'stretch')
727 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
728 ad = getfield(as, 'shrink')
729 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
733 local bs = getfield(gb, 'spec')
734 -- gb: glue, ga: kern
735 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
736 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
737 bd = getfield(bs, 'stretch')
738 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
739 bd = getfield(bs, 'shrink')
740 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
747 local function calc_ja_ja_glue()
748 if ihb_flag then return nil
750 local qm, pm = Nq.met, Np.met
751 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
752 return new_jfm_glue(qm, Nq.class, Np.class)
754 local npn, nqn = Np.nuc, Nq.nuc
755 local gb, db = new_jfm_glue(qm, Nq.class,
756 slow_find_char_class(has_attr(npn, attr_orig_char),
758 local ga, da = new_jfm_glue(pm,
759 slow_find_char_class(has_attr(nqn, attr_orig_char),
762 return calc_ja_ja_aux(gb, ga, db, da);
767 -------------------- 和欧文間空白量の決定
771 local get_xkanjiskip_normal, get_xkanjiskip_jfm
773 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
774 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
775 get_xkanjiskip_normal = function (Nn)
776 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
777 local f = node_copy(xkanji_skip)
780 local g = node_copy(zero_glue)
781 set_attr(g, attr_icflag, XKANJI_SKIP)
785 get_xkanjiskip_jfm = function (Nn)
787 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
788 g = node_new(id_glue)
789 local gx = node_new(id_glue_spec);
790 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
791 local bk = Nn.met.xkanjiskip or {0, 0, 0}
792 setfield(gx, 'width', bk[1])
793 setfield(gx, 'stretch', bk[2])
794 setfield(gx, 'shrink', bk[3])
795 setfield(g, 'spec', gx)
797 g = node_copy(zero_glue)
799 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
804 -------------------- 隣接した「塊」間の処理
806 local function get_OA_skip()
809 return new_jfm_glue(pm,
810 fast_find_char_class(((Nq.id == id_math and -1) or (type(Nq.char)=='string' and Nq.char or 'jcharbdd')), pm), Np.class)
814 local function get_OB_skip()
817 return new_jfm_glue(qm, Nq.class,
818 fast_find_char_class(((Np.id == id_math and -1) or'jcharbdd'), qm))
823 -- (anything) .. jachar
824 local function handle_np_jachar(mode)
826 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
827 local g = calc_ja_ja_glue() or get_kanjiskip() -- M->K
828 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
829 elseif Nq.met then -- qid==id_hlist
830 local g = get_OA_skip() or get_kanjiskip() -- O_A->K
831 handle_penalty_normal(0, Np.pre, g); real_insert(g)
833 local g = get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
834 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
836 local g = get_OA_skip() -- O_A
837 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
838 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
839 else handle_penalty_always(0, Np.pre, g)
843 if mode and Np.kcat%2~=1 then
844 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
849 -- jachar .. (anything)
850 local function handle_nq_jachar()
852 local g = get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
853 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
855 local g = get_OB_skip() -- O_B
856 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
857 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
858 else handle_penalty_always(Nq.post, 0, g)
864 -- (anything) .. (和文文字で始まる hlist)
865 local function handle_np_ja_hlist()
867 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
868 local g = get_OB_skip() or get_kanjiskip() -- O_B->K
869 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
870 elseif Nq.met then -- Nq.id==id_hlist
871 local g = get_kanjiskip() -- K
872 handle_penalty_suppress(0, 0, g); real_insert(g)
874 local g = get_xkanjiskip(Np) -- X
875 handle_penalty_suppress(0, 0, g); real_insert(g)
879 -- (和文文字で終わる hlist) .. (anything)
880 local function handle_nq_ja_hlist()
882 local g = get_xkanjiskip(Nq) -- X
883 handle_penalty_suppress(0, 0, g); real_insert(g)
888 -- Nq が前側のクラスタとなることによる修正
890 local adjust_nq_aux = {
891 [id_glyph] = function()
893 return set_np_xspc_alchar(Nq, getchar(x),x, 2)
894 end, -- after_alchar(Nq)
895 [id_hlist] = function() after_hlist(Nq) end,
896 [id_pbox] = function() after_hlist(Nq) end,
897 [id_disc] = function() after_hlist(Nq) end,
898 [id_pbox_w] = function()
899 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
905 local x = adjust_nq_aux[Nq.id]
911 -------------------- 開始・終了時の処理
915 local JWP = luatexja.stack_table_index.JWP
916 local function handle_list_tail(mode)
919 -- the current list is to be line-breaked.
920 -- Insert \jcharwidowpenalty
921 Bp = widow_Bp; Np = widow_Np
923 handle_penalty_normal(0,
924 table_current_stack[JWP] or 0)
927 -- the current list is the contents of a hbox
928 local npi, pm = Np.id, Np.met
929 if npi == id_jglyph or (npi==id_pbox and pm) then
930 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
932 set_attr(g, attr_icflag, BOXBDD)
933 head = insert_after(head, Np.last, g)
940 local function handle_list_head(par_indented)
941 local npi, pm = Np.id, Np.met
942 if npi == id_jglyph or (npi==id_pbox and pm) then
944 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
946 set_attr(g, attr_icflag, BOXBDD)
947 if getid(g)==id_glue and #Bp==0 then
948 local h = node_new(id_penalty)
949 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
951 head = insert_before(head, Np.first, g)
958 -- return value: (the initial cursor lp), (last node)
961 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
962 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
963 local KSK = luatexja.stack_table_index.KSK
964 local XSK = luatexja.stack_table_index.XSK
965 local dir_yoko = luatexja.dir_table.dir_yoko
966 init_var = function (mode)
967 -- 1073741823: max_dimen
968 Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
969 table_current_stack = ltjs.table_current_stack
971 list_dir = ltjs.list_dir or dir_yoko
972 kanji_skip = node_new(id_glue)
973 setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
974 set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
975 get_kanjiskip = (getfield(getfield(kanji_skip, 'spec'), 'width') == 1073741823)
976 and get_kanjiskip_jfm or get_kanjiskip_normal
978 xkanji_skip = node_new(id_glue)
979 setfield(xkanji_skip, 'spec', skip_table_to_spec(XSK))
980 set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
981 get_xkanjiskip = (getfield(getfield(xkanji_skip, 'spec'), 'width') == 1073741823)
982 and get_xkanjiskip_jfm or get_xkanjiskip_normal
985 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
986 first=nil, id=nil, last=nil, met=nil, nuc=nil,
987 post=nil, pre=nil, xspc=nil,
990 auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
991 first=nil, id=nil, last=nil, met=nil, nuc=nil,
992 post=nil, pre=nil, xspc=nil,
995 -- the current list is to be line-breaked:
996 -- hbox from \parindent is skipped.
997 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
998 while lp and ((lpi==id_whatsit and lps~=sid_user)
999 or ((lpi==id_hlist) and (lps==3))) do
1000 if (lpi==id_hlist) and (lps==3) then
1001 Np.char, par_indented = 'parbdd', 'parbdd'
1002 Np.width = getfield(lp, 'width')
1004 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
1005 return lp, node_tail(head), par_indented
1007 return head, nil, 'boxbdd'
1012 local tex_set_attr = tex.setattribute
1013 local function cleanup(mode)
1014 -- adjust attr_icflag for avoiding error
1015 tex_set_attr('global', attr_icflag, 0)
1016 node_free(kanji_skip); node_free(xkanji_skip)
1018 local h = node_next(head)
1019 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
1021 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
1028 -------------------- 外部から呼ばれる関数
1031 function main(ahead, mode)
1032 if not ahead then return ahead end
1034 local lp, last, par_indented = init_var(mode)
1035 lp = calc_np(lp, last)
1037 extract_np(); handle_list_head(par_indented)
1039 return cleanup(mode)
1041 lp = calc_np(lp, last)
1045 local pid, pm = Np.id, Np.met
1047 if pid == id_jglyph then
1048 handle_np_jachar(mode)
1050 if pid==id_hlist then handle_np_ja_hlist()
1051 else handle_np_jachar() end
1053 if Nq.id==id_hlist then handle_nq_ja_hlist()
1054 else handle_nq_jachar() end
1056 lp = calc_np(lp, last)
1058 handle_list_tail(mode)
1059 return cleanup(mode)
1064 local IHB = luatexja.userid_table.IHB
1065 local BPAR = luatexja.userid_table.BPAR
1066 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1067 local node_write = Dnode.write
1070 function create_inhibitglue_node()
1071 local tn = node_new(id_whatsit, sid_user)
1072 setfield(tn, 'user_id', IHB)
1073 setfield(tn, 'type', 100)
1074 setfield(tn, 'value', 1)
1078 -- Node for indicating beginning of a paragraph
1079 -- (for ltjsclasses)
1080 function create_beginpar_node()
1081 local tn = node_new(id_whatsit, sid_user)
1082 setfield(tn, 'user_id', BPAR)
1083 setfield(tn, 'type', 100)
1084 setfield(tn, 'value', 1)
1088 local function whatsit_callback(Np, lp, Nq)
1089 if Np and Np.nuc then return Np
1090 elseif Np and getfield(lp, 'user_id') == BPAR then
1091 Np.first = lp; Np.nuc = lp; Np.last = lp
1094 Np.pre = 0; Np.post = 0
1096 Np.auto_xspc = false
1101 local function whatsit_after_callback(s, Nq, Np)
1102 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1103 local x, y = node_prev(Nq.nuc), Nq.nuc
1104 Nq.first, Nq.nuc, Nq.last = x, x, x
1105 head = node_remove(head, y)
1111 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1112 "luatexja.beginpar.np_info", 1)
1113 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1114 "luatexja.beginpar.np_info_after", 1)