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')
69 local lang_ja = token.create('ltj@@japanese')[2]
71 local sid_start_link = node.subtype('pdf_start_link')
72 local sid_start_thread = node.subtype('pdf_start_thread')
73 local sid_end_link = node.subtype('pdf_end_link')
74 local sid_end_thread = node.subtype('pdf_end_thread')
76 local ITALIC = luatexja.icflag_table.ITALIC
77 local PACKED = luatexja.icflag_table.PACKED
78 local KINSOKU = luatexja.icflag_table.KINSOKU
79 local FROM_JFM = luatexja.icflag_table.FROM_JFM
80 local PROCESSED = luatexja.icflag_table.PROCESSED
81 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
82 local BOXBDD = luatexja.icflag_table.BOXBDD
83 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
85 local attr_icflag = luatexbase.attributes['ltj@icflag']
88 local table_current_stack
93 local set_np_xspc_jachar
94 local set_np_xspc_jachar_hbox
96 local ltjs_orig_char_table = ltjs.orig_char_table
98 local function get_attr_icflag(p)
99 return (has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG
102 -------------------- Helper functions
104 -- This function is called only for acquiring `special' characters.
105 local function fast_find_char_class(c,m)
106 return m.chars[c] or 0
110 local slow_find_char_class
112 local start_time_measure = ltjb.start_time_measure
113 local stop_time_measure = ltjb.stop_time_measure
114 slow_find_char_class = function (c, m, oc)
115 local cls = ltjf_find_char_class(oc, m)
116 if oc~=c and c and cls==0 then
117 return ltjf_find_char_class(c, m)
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 setfield(p, 'penalty', 0) end
151 elseif pp<=-10000 then
152 if e>=10000 then setfield(p, 'penalty', 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
162 diffmet_rule = math.two_paverage
163 function math.two_add(a,b) return a+b end
164 function math.two_average(a,b) return (a+b)*0.5 end
165 function math.two_paverage(a,b) return (a+b)/2 end
166 function math.two_pleft(a,b) return a end
167 function math.two_pright(a,b) return b end
169 local head -- the head of current list
172 local widow_Bp, widow_Np -- \jcharwidowpenalty 挿入位置管理用
174 local non_ihb_flag -- JFM グルー挿入抑止用 flag
175 -- false: \inhibitglue 指定時 true: それ以外
177 -------------------- hlist 内の文字の検索
179 local first_char, last_char, find_first_char
181 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
182 local function check_box(box_ptr, box_end)
183 local p = box_ptr; local found_visible_node = false
185 find_first_char = false; last_char = nil
188 while p and p~=box_end do
190 if pid==id_kern and getsubtype(p)==2 then
191 p = node_next(node_next(node_next(p))); pid = getid(p) -- p must be glyph_node
193 if pid==id_glyph then
195 if find_first_char then
196 first_char = p; find_first_char = false
198 last_char = p; found_visible_node = true; p=node_next(p)
199 if (not p) or p==box_end then
200 return found_visible_node
202 until getid(p)~=id_glyph
203 pid = getid(p) -- p must be non-nil
206 local pa = get_attr_icflag(p)
207 if pa==IC_PROCESSED then
209 elseif getsubtype(p)==2 then
210 p = node_next(node_next(p));
211 -- Note that another node_next will be executed outside this if-statement.
213 found_visible_node = true
214 find_first_char = false; last_char = nil
216 elseif pid==id_hlist then
217 if PACKED == get_attr_icflag(p) then
218 local s = ltjd_glyph_from_packed(p)
219 if find_first_char then
220 first_char = s; find_first_char = false
222 last_char = s; found_visible_node = true
224 if getfield(p, 'shift')==0 then
225 if check_box(getlist(p), nil) then found_visible_node = true end
227 find_first_char = false; last_char = nil
230 elseif pid==id_math then
231 if find_first_char then
232 first_char = p; find_first_char = false
234 last_char = p; found_visible_node = true
235 elseif pid==id_rule and get_attr_icflag(p)==PACKED then
237 elseif not (pid==id_ins or pid==id_mark
238 or pid==id_adjust or pid==id_whatsit
239 or pid==id_penalty) then
240 found_visible_node = true
241 find_first_char = false; last_char = nil
245 return found_visible_node
248 function check_box_high(Nx, box_ptr, box_end)
249 first_char = nil; last_char = nil; find_first_char = true
250 if check_box(box_ptr, box_end) then
251 local first_char = first_char
253 if getid(first_char)==id_glyph then
254 if getfield(first_char, 'lang') == lang_ja then
255 set_np_xspc_jachar_hbox(Nx, first_char)
257 set_np_xspc_alchar(Nx, getchar(first_char),first_char, 1)
260 set_np_xspc_alchar(Nx, -1,first_char)
267 -------------------- Np の計算と情報取得
269 luatexbase.create_callback("luatexja.jfmglue.whatsit_getinfo", "data",
270 function (Np, lp, Nq)
271 if Np.nuc then return Np
273 return Np -- your code
276 luatexbase.create_callback("luatexja.jfmglue.whatsit_after", "data",
277 function (stat, Nq, Np) return false end)
283 local traverse = Dnode.traverse
284 local function check_next_ickern(lp)
285 if lp and getid(lp) == id_kern and ITALIC == get_attr_icflag(lp) then
286 set_attr(lp, attr_icflag, IC_PROCESSED)
287 Np.last = lp; return node_next(lp)
289 Np.last = Np.nuc; return lp
293 local function calc_np_pbox(lp, last)
294 local first, lpa, nc = (not Np.first), KINSOKU, nil
295 Np.first = Np.first or lp; Np.id = id_pbox
296 set_attr(lp, attr_icflag, get_attr_icflag(lp));
297 while lp ~=last and (lpa>=PACKED) and (lpa<BOXBDD) do
298 if getid(lp)==id_hlist or getid(lp)==id_vlist then
299 head, lp, nc = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm pbox')
300 Np.first = first and nc or Np.first
302 nc, lp = lp, node_next(lp)
304 first, lpa = false, (lp and has_attr(lp, attr_icflag) or 0)
305 -- get_attr_icflag() ではいけない!
308 lp = check_next_ickern(lp)
309 Np.last_char = check_box_high(Np, Np.first, lp)
313 local ltjw_apply_ashift_math = ltjw.apply_ashift_math
314 local ltjw_apply_ashift_disc = ltjw.apply_ashift_disc
315 local min, max = math.min, math.max
316 local function calc_np_aux_glyph_common(lp)
318 Np.first= (Np.first or lp)
319 if getfield(lp, 'lang') == lang_ja then
321 local m, cls = set_np_xspc_jachar(Np, lp)
323 lp, head, npi, npf = capsule_glyph(lp, m, cls, head, tex_dir, lp)
324 Np.first = (Np.first~=Np.nuc) and Np.first or npf or npi
326 return true, check_next_ickern(lp);
329 set_np_xspc_alchar(Np, getchar(lp), lp, 1)
331 local first_glyph, last_glyph = lp
332 set_attr(lp, attr_icflag, PROCESSED); Np.last = lp
333 local y_adjust = has_attr(lp,attr_ablshift) or 0
334 local node_depth = getfield(lp, 'depth') + min(y_adjust, 0)
335 local adj_depth = (y_adjust>0) and (getfield(lp, 'depth') + y_adjust) or 0
336 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
338 for lx in traverse(lp) do
339 local lai = get_attr_icflag(lx)
340 if lx==last or lai>=PACKED then
343 local lid = getid(lx)
344 if lid==id_glyph and getfield(lx, 'lang') ~= lang_ja then
346 last_glyph = lx; set_attr(lx, attr_icflag, PROCESSED); Np.last = lx
347 y_adjust = has_attr(lx,attr_ablshift) or 0
348 node_depth = max(getfield(lx, 'depth') + min(y_adjust, 0), node_depth)
349 adj_depth = (y_adjust>0) and max(getfield(lx, 'depth') + y_adjust, adj_depth) or adj_depth
350 setfield(lx, 'yoffset', getfield(lx, 'yoffset') - y_adjust)
351 elseif lid==id_kern then
352 local ls = getsubtype(lx)
353 if ls==2 then -- アクセント用の kern
354 set_attr(lx, attr_icflag, PROCESSED)
355 lx = node_next(lx) -- lp: アクセント本体
356 setfield(lx, 'yoffset', getfield(lp, 'yoffset') - (has_attr(lx,attr_ablshift) or 0))
357 lx = node_next(node_next(lx))
360 elseif (ls==1 and lai==ITALIC) then
361 Np.last = lx; set_attr(lx, attr_icflag, IC_PROCESSED)
371 if adj_depth>node_depth then
372 r = node_new(id_rule)
373 setfield(r, 'width', 0); setfield(r, 'height', 0)
374 setfield(r, 'depth',adj_depth); setfield(r, 'dir', tex_dir)
375 set_attr(r, attr_icflag, PROCESSED)
378 Np.last_char = last_glyph
379 if r then insert_after(head, first_glyph, r) end
384 local nf, nc = getfont(npn), getchar(npn)
385 local ct = (font.getfont(nf) or font.fonts[nf] ).characters[nc]
386 if (ct.left_protruding or 0) == 0 then
387 head = insert_before(head, npn, r)
388 Np.first = (Np.first==npn) and r or npn
389 elseif (ct.right_protruding or 0) == 0 then
390 insert_after(head, npn, r); Np.last, lp = r, r
392 ltjb.package_warning_no_line(
394 'Check depth of glyph node ' .. tostring(npn) .. '(font=' .. nf
395 .. ', char=' .. nc .. '), because its \\lpcode is ' .. tostring(ct.left_protruding)
396 .. ' and its \\rpcode is ' .. tostring(ct.right_protruding)
404 local calc_np_auxtable = {
405 [id_glyph] = calc_np_aux_glyph_common,
406 [id_hlist] = function(lp)
408 head, lp, op, flag = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm hlist')
409 set_attr(op, attr_icflag, PROCESSED)
410 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
411 if (flag or getfield(op, 'shift')~=0) then
415 Np.last_char = check_box_high(Np, getlist(op), nil)
419 [id_vlist] = function(lp)
421 head, lp, op = ltjd_make_dir_whatsit(head, lp, list_dir, 'jfm:' .. getid(lp))
422 Np.first = Np.first or op; Np.last = op; Np.nuc = op;
426 box_like = function(lp)
427 Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
429 return true, node_next(lp)
432 set_attr(lp, attr_icflag, PROCESSED)
433 return false, node_next(lp)
435 [id_whatsit] = function(lp)
436 local lps = getsubtype(lp)
437 if lps==sid_user then
438 if getfield(lp, 'user_id')==luatexja.userid_table.IHB then
439 local lq = node_next(lp);
440 head = node_remove(head, lp); node_free(lp); non_ihb_flag = false
443 set_attr(lp, attr_icflag, PROCESSED)
444 luatexbase.call_callback("luatexja.jfmglue.whatsit_getinfo",
447 Np.id = id_pbox_w; Np.first = Np.nuc; Np.last = Np.nuc;
448 return true, node_next(lp)
450 return false, node_next(lp)
454 -- we do special treatment for these whatsit nodes.
455 if lps == sid_start_link or lps == sid_start_thread then
457 elseif lps == sid_end_link or lps == sid_end_thread then
458 Np.first, Nq.last = nil, lp;
460 set_attr(lp, attr_icflag, PROCESSED)
461 return false, node_next(lp)
464 [id_math] = function(lp)
465 Np.first, Np.nuc = (Np.first or lp), lp;
466 set_attr(lp, attr_icflag, PROCESSED)
467 set_np_xspc_alchar(Np, -1, lp)
468 local end_math = node_end_of_math(lp)
469 ltjw_apply_ashift_math(lp, end_math, attr_ablshift)
470 set_attr(end_math, attr_icflag, PROCESSED)
471 Np.last, Np.id = end_math, id_math;
472 return true, node_next(end_math);
474 [id_glue] = function(lp)
475 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
476 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
477 return true, node_next(lp)
479 [id_disc] = function(lp)
480 Np.first, Np.nuc, Np.last = (Np.first or lp), lp, lp;
481 Np.id = getid(lp); set_attr(lp, attr_icflag, PROCESSED)
482 ltjw_apply_ashift_disc(lp, (list_dir==dir_tate), tex_dir)
483 Np.last_char = check_box_high(Np, getfield(lp, 'replace'), nil)
484 return true, node_next(lp)
486 [id_kern] = function(lp)
487 if getsubtype(lp)==2 then
488 Np.first = Np.first or lp
489 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
490 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
491 set_attr(lp, attr_icflag, PROCESSED); lp = node_next(lp)
492 set_attr(lp, attr_icflag, PROCESSED);
493 return calc_np_aux_glyph_common(lp)
495 Np.first = Np.first or lp
496 Np.id = id_kern; set_attr(lp, attr_icflag, PROCESSED)
497 Np.last = lp; return true, node_next(lp)
500 [id_penalty] = function(lp)
501 Bp[#Bp+1] = lp; set_attr(lp, attr_icflag, PROCESSED)
502 return false, node_next(lp)
505 calc_np_auxtable[id_rule] = calc_np_auxtable.box_like
506 calc_np_auxtable[13] = calc_np_auxtable.box_like
507 calc_np_auxtable[id_ins] = calc_np_auxtable.skip
508 calc_np_auxtable[id_mark] = calc_np_auxtable.skip
509 calc_np_auxtable[id_adjust] = calc_np_auxtable.skip
511 function calc_np(last, lp)
513 -- We assume lp = node_next(Np.last)
514 Np, Nq, non_ihb_flag = Nq, Np, true
515 -- We clear `predefined' entries of Np before pairs() loop,
516 -- because using only pairs() loop is slower.
517 Np.post, Np.pre, Np.xspc = nil, nil, nil
518 Np.first, Np.id, Np.last, Np.met, Np.class= nil, nil, nil, nil
519 Np.auto_kspc, Np.auto_xspc, Np.char, Np.nuc = nil, nil, nil, nil
520 for k in pairs(Np) do Np[k] = nil end
522 for k = 1,#Bp do Bp[k] = nil end
524 local lpa = has_attr(lp, attr_icflag) or 0
527 if lpa%PROCESSED_BEGIN_FLAG == BOXBDD then
528 local lq = node_next(lp)
529 head = node_remove(head, lp); node_free(lp); lp = lq
531 return calc_np_pbox(lp, last)
534 k, lp = calc_np_auxtable[getid(lp)](lp)
535 if k then return lp end
542 -- extract informations from Np
543 -- We think that "Np is a Japanese character" if Np.met~=nil,
544 -- "Np is an alphabetic character" if Np.pre~=nil,
545 -- "Np is not a character" otherwise.
546 after_hlist = nil -- global
547 local after_alchar, extract_np
549 local PRE = luatexja.stack_table_index.PRE
550 local POST = luatexja.stack_table_index.POST
551 local KCAT = luatexja.stack_table_index.KCAT
552 local XSP = luatexja.stack_table_index.XSP
553 local dir_tate = luatexja.dir_table.dir_tate
556 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
557 local attr_jchar_code = luatexbase.attributes['ltj@charcode']
558 local attr_autospc = luatexbase.attributes['ltj@autospc']
559 local attr_autoxspc = luatexbase.attributes['ltj@autoxspc']
560 --local ltjf_get_vert_glyph = ltjf.get_vert_glyph
561 function set_np_xspc_jachar(Nx, x)
562 local m = ltjf_font_metric_table[getfont(x)]
563 local c, c_glyph = ltjs_orig_char_table[x], getchar(x)
565 local cls = slow_find_char_class(c, m, c_glyph)
566 Nx.met, Nx.class, Nx.char = m, cls, c;
567 if cls~=0 then set_attr(x, attr_jchar_class, cls) end
568 if c~=c_glyph then set_attr(x, attr_jchar_code, c) end
569 Nx.pre = table_current_stack[PRE + c] or 0
570 Nx.post = table_current_stack[POST + c] or 0
571 Nx.xspc = table_current_stack[XSP + c] or 3
572 Nx.kcat = table_current_stack[KCAT + c] or 0
573 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
576 function set_np_xspc_jachar_hbox(Nx, x)
577 local m = ltjf_font_metric_table[getfont(x)]
578 local c = has_attr(x, attr_jchar_code) or getchar(x)
579 Nx.met, Nx.char = m, c; Nx.class = has_attr(x, attr_jchar_class) or 0;
580 Nx.pre = table_current_stack[PRE + c] or 0
581 Nx.post = table_current_stack[POST + c] or 0
582 Nx.xspc = table_current_stack[XSP + c] or 3
583 Nx.kcat = table_current_stack[KCAT + c] or 0
584 Nx.auto_kspc, Nx.auto_xspc = (has_attr(x, attr_autospc)==1), (has_attr(x, attr_autoxspc)==1)
588 local floor = math.floor
589 function set_np_xspc_alchar(Nx, c,x, lig)
591 local f = (lig ==1) and nullfunc or node_tail
592 local xc, xs = getfield(x, 'components'), getsubtype(x)
593 while xc and xs and xs%4>=2 do
594 x = f(xc); xc, xs = getfield(x, 'components'), getsubtype(x)
597 Nx.pre = table_current_stack[PRE + c] or 0
598 Nx.post = table_current_stack[POST + c] or 0
599 Nx.xspc = table_current_stack[XSP + c] or 3
601 Nx.pre, Nx.post = 0, 0
602 Nx.xspc = table_current_stack[XSP - 1] or 3
605 Nx.auto_xspc = (has_attr(x, attr_autoxspc)==1)
607 local set_np_xspc_alchar = set_np_xspc_alchar
609 -- change the information for the next loop
610 -- (will be done if Nx is an alphabetic character or a hlist)
611 after_hlist = function (Nx)
612 local s = Nx.last_char
614 if getid(s)==id_glyph then
615 if getfield(s, 'lang') == lang_ja then
616 set_np_xspc_jachar_hbox(Nx, s)
618 set_np_xspc_alchar(Nx, getchar(s), s, 2)
621 set_np_xspc_alchar(Nx, -1, s)
624 Nx.pre, Nx.met = nil, nil
628 after_alchar = function (Nx)
629 local x = Nx.last_char
630 return set_np_xspc_alchar(Nx, getchar(x), x, 2)
635 -------------------- 最下層の処理
637 -- change penalties (or create a new penalty, if needed)
638 local function handle_penalty_normal(post, pre, g)
639 local a = (pre or 0) + (post or 0)
641 if (a~=0 and not(g and getid(g)==id_kern)) then
642 local p = node_new(id_penalty)
643 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
644 setfield(p, 'penalty', a)
645 head = insert_before(head, Np.first, p)
647 set_attr(p, attr_icflag, KINSOKU)
649 else for _, v in pairs(Bp) do add_penalty(v,a) end
653 local function handle_penalty_always(post, pre, g)
654 local a = (pre or 0) + (post or 0)
656 if not (g and getid(g)==id_glue) or a~=0 then
657 local p = node_new(id_penalty)
658 if a<-10000 then a = -10000 elseif a>10000 then a = 10000 end
659 setfield(p, 'penalty', a)
660 head = insert_before(head, Np.first, p)
662 set_attr(p, attr_icflag, KINSOKU)
664 else for _, v in pairs(Bp) do add_penalty(v,a) end
668 local function handle_penalty_suppress(post, pre, g)
669 local a = (pre or 0) + (post or 0)
671 if g and getid(g)==id_glue then
672 local p = node_new(id_penalty)
673 setfield(p, 'penalty', 10000); head = insert_before(head, Np.first, p)
675 set_attr(p, attr_icflag, KINSOKU)
677 else for _, v in pairs(Bp) do add_penalty(v,a) end
681 -- 和文文字間の JFM glue を node 化
682 local function new_jfm_glue(m, bc, ac)
683 -- bc, ac: char classes
684 local g = m.char_type[bc][ac]
687 local f = node_new(id_glue)
688 set_attr(f, attr_icflag, g[4])
689 setfield(f, 'spec', node_copy(g[2]))
692 return node_copy(g[2]), g[3]
698 -- Nq.last (kern w) .... (glue/kern g) Np.first
699 local function real_insert(g)
701 head = insert_before(head, Np.first, g)
707 -------------------- 和文文字間空白量の決定
708 local null_skip_table = {0, 0, 0}
711 local get_kanjiskip_normal, get_kanjiskip_jfm
713 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
714 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
715 get_kanjiskip_normal = function ()
716 if Np.auto_kspc or Nq.auto_kspc then
717 return node_copy(kanji_skip)
719 local g = node_copy(zero_glue)
720 set_attr(g, attr_icflag, KANJI_SKIP)
725 get_kanjiskip_jfm = function ()
727 if Np.auto_kspc or Nq.auto_kspc then
728 g = node_new(id_glue); --copy_attr(g, Nq.nuc)
729 local gx = node_new(id_glue_spec);
730 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
731 local pm, qm = Np.met, Nq.met
732 local bk = qm.kanjiskip or null_skip_table
733 if (pm.char_type==qm.char_type) and (qm.var==pm.var) then
734 setfield(gx, 'width', bk[1])
735 setfield(gx, 'stretch', bk[2])
736 setfield(gx, 'shrink', bk[3])
738 local ak = pm.kanjiskip or null_skip_table
739 setfield(gx, 'width', round(diffmet_rule(bk[1], ak[1])))
740 setfield(gx, 'stretch', round(diffmet_rule(bk[2], ak[2])))
741 setfield(gx, 'shrink', -round(diffmet_rule(-bk[3], -ak[3])))
743 setfield(g, 'spec', gx)
745 g = node_copy(zero_glue)
747 set_attr(g, attr_icflag, KANJI_SKIP_JFM)
754 local bg_ag = 2*id_glue - id_glue
755 local bg_ak = 2*id_glue - id_kern
756 local bk_ag = 2*id_kern - id_glue
757 local bk_ak = 2*id_kern - id_kern
759 calc_ja_ja_aux = function (gb,ga, db, da)
760 local rbb, rab = 0.5*(1-db), 0.5*(1-da) -- 「前の文字」由来のグルーの割合
761 local rba, raa = 0.5*(1+db), 0.5*(1+da) -- 「前の文字」由来のグルーの割合
762 if diffmet_rule ~= math.two_pleft and diffmet_rule ~= math.two_pright
763 and diffmet_rule ~= math.two_paverage then
764 rbb, rab, rba, raa = 1,0,0,1
768 gb = node_new(id_kern); setfield(gb, 'kern', 0)
771 ga = node_new(id_kern); setfield(ga, 'kern', 0)
774 local k = 2*getid(gb) - getid(ga)
776 local bs, as = getfield(gb, 'spec'), getfield(ga, 'spec')
778 local bd, ad = getfield(bs, 'width'), getfield(as, 'width')
779 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
780 bd, ad = getfield(bs, 'stretch'), getfield(as, 'stretch')
781 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
782 bd, ad = getfield(bs, 'shrink'), getfield(as, 'shrink')
783 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd - rba*ad, -rab*bd - raa*ad)))
786 elseif k == bk_ak then
788 local bd, ad = getfield(gb, 'kern'), getfield(ga, 'kern')
789 setfield(gb, 'kern', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
792 elseif k == bk_ag then
793 local as = getfield(ga, 'spec')
794 -- gb: kern, ga: glue
795 local bd, ad = getfield(gb, 'kern'), getfield(as, 'width')
796 setfield(as, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
797 ad = getfield(as, 'stretch')
798 setfield(bs, 'stretch', round(diffmet_rule(rba*ad, raa*ad)))
799 ad = getfield(as, 'shrink')
800 setfield(bs, 'shrink', -round(diffmet_rule(-rba*ad, -raa*ad)))
804 local bs = getfield(gb, 'spec')
805 -- gb: glue, ga: kern
806 local bd, ad = getfield(bs, 'width'), getfield(ga, 'kern')
807 setfield(bs, 'width', round(diffmet_rule(rbb*bd + rba*ad, rab*bd + raa*ad)))
808 bd = getfield(bs, 'stretch')
809 setfield(bs, 'stretch', round(diffmet_rule(rbb*bd, rab*bd)))
810 bd = getfield(bs, 'shrink')
811 setfield(bs, 'shrink', -round(diffmet_rule(-rbb*bd, -rab*bd)))
818 local function calc_ja_ja_glue()
819 local qm, pm = Nq.met, Np.met
820 if (qm.char_type==pm.char_type) and (qm.var==pm.var) then
821 return new_jfm_glue(qm, Nq.class, Np.class)
823 local npn, nqn = Np.nuc, Nq.nuc
824 local gb, db = new_jfm_glue(qm, Nq.class,
825 slow_find_char_class(Np.char,
827 local ga, da = new_jfm_glue(pm,
828 slow_find_char_class(Nq.char,
831 return calc_ja_ja_aux(gb, ga, db, da);
835 -------------------- 和欧文間空白量の決定
839 local get_xkanjiskip_normal, get_xkanjiskip_jfm
841 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
842 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
843 get_xkanjiskip_normal = function (Nn)
844 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
845 return node_copy(xkanji_skip)
847 local g = node_copy(zero_glue)
848 set_attr(g, attr_icflag, XKANJI_SKIP)
852 get_xkanjiskip_jfm = function (Nn)
854 if (Nq.xspc>=2) and (Np.xspc%2==1) and (Nq.auto_xspc or Np.auto_xspc) then
855 g = node_new(id_glue)
856 local gx = node_new(id_glue_spec);
857 setfield(gx, 'stretch_order', 0); setfield(gx, 'shrink_order', 0)
858 local bk = Nn.met.xkanjiskip or null_skip_table
859 setfield(gx, 'width', bk[1])
860 setfield(gx, 'stretch', bk[2])
861 setfield(gx, 'shrink', bk[3])
862 setfield(g, 'spec', gx)
864 g = node_copy(zero_glue)
866 set_attr(g, attr_icflag, XKANJI_SKIP_JFM)
871 -------------------- 隣接した「塊」間の処理
873 local function get_OA_skip()
875 return new_jfm_glue(pm,
876 fast_find_char_class((Nq.id == id_math and -1 or 'jcharbdd'), pm), Np.class)
878 local function get_OB_skip()
880 return new_jfm_glue(qm, Nq.class,
881 fast_find_char_class((Np.id == id_math and -1 or'jcharbdd'), qm))
884 -- (anything) .. jachar
885 local function handle_np_jachar(mode)
887 if qid==id_jglyph or ((qid==id_pbox or qid==id_pbox_w) and Nq.met) then
888 local g = non_ihb_flag and calc_ja_ja_glue() or get_kanjiskip() -- M->K
889 handle_penalty_normal(Nq.post, Np.pre, g); real_insert(g)
890 elseif Nq.met then -- qid==id_hlist
891 local g = non_ihb_flag and get_OA_skip() or get_kanjiskip() -- O_A->K
892 handle_penalty_normal(0, Np.pre, g); real_insert(g)
894 local g = non_ihb_flag and get_OA_skip() or get_xkanjiskip(Np) -- O_A->X
895 handle_penalty_normal((qid==id_hlist and 0 or Nq.post), Np.pre, g); real_insert(g)
897 local g = non_ihb_flag and get_OA_skip() -- O_A
898 if qid==id_glue then handle_penalty_normal(0, Np.pre, g)
899 elseif qid==id_kern then handle_penalty_suppress(0, Np.pre, g)
900 else handle_penalty_always(0, Np.pre, g)
904 if mode and Np.kcat%2~=1 then
905 widow_Np.first, widow_Bp, Bp = Np.first, Bp, widow_Bp
910 -- jachar .. (anything)
911 local function handle_nq_jachar()
913 local g = non_ihb_flag and get_OB_skip() or get_xkanjiskip(Nq) -- O_B->X
914 handle_penalty_normal(Nq.post, (Np.id==id_hlist and 0 or Np.pre), g); real_insert(g)
916 local g =non_ihb_flag and get_OB_skip() -- O_B
917 if Np.id==id_glue then handle_penalty_normal(Nq.post, 0, g)
918 elseif Np.id==id_kern then handle_penalty_suppress(Nq.post, 0, g)
919 else handle_penalty_always(Nq.post, 0, g)
925 -- (anything) .. (和文文字で始まる hlist)
926 local function handle_np_ja_hlist()
928 if qid==id_jglyph or ((qid==id_pbox or Nq.id == id_pbox_w) and Nq.met) then
929 local g = non_ihb_flag and get_OB_skip() or get_kanjiskip() -- O_B->K
930 handle_penalty_normal(Nq.post, 0, g); real_insert(g)
931 elseif Nq.met then -- Nq.id==id_hlist
932 local g = get_kanjiskip() -- K
933 handle_penalty_suppress(0, 0, g); real_insert(g)
935 local g = get_xkanjiskip(Np) -- X
936 handle_penalty_suppress(0, 0, g); real_insert(g)
940 -- (和文文字で終わる hlist) .. (anything)
941 local function handle_nq_ja_hlist()
943 local g = get_xkanjiskip(Nq) -- X
944 handle_penalty_suppress(0, 0, g); real_insert(g)
949 -- Nq が前側のクラスタとなることによる修正
951 local adjust_nq_aux = {
952 [id_glyph] = function() after_alchar(Nq) end, -- after_alchar(Nq)
953 [id_hlist] = function() after_hlist(Nq) end,
954 [id_pbox] = function() after_hlist(Nq) end,
955 [id_disc] = function() after_hlist(Nq) end,
956 [id_pbox_w] = function()
957 luatexbase.call_callback("luatexja.jfmglue.whatsit_after",
963 local x = adjust_nq_aux[Nq.id]
969 -------------------- 開始・終了時の処理
973 local JWP = luatexja.stack_table_index.JWP
974 local function handle_list_tail(mode)
977 -- the current list is to be line-breaked.
978 -- Insert \jcharwidowpenalty
979 Bp = widow_Bp; Np = widow_Np
981 handle_penalty_normal(0, table_current_stack[JWP] or 0)
984 -- the current list is the contents of a hbox
985 local npi, pm = Np.id, Np.met
986 if npi == id_jglyph or (npi==id_pbox and pm) then
987 local g = new_jfm_glue(pm, Np.class, fast_find_char_class('boxbdd', pm))
989 set_attr(g, attr_icflag, BOXBDD)
990 head = insert_after(head, Np.last, g)
997 local function handle_list_head(par_indented)
998 local npi, pm = Np.id, Np.met
999 if npi == id_jglyph or (npi==id_pbox and pm) then
1000 if non_ihb_flag then
1001 local g = new_jfm_glue(pm, fast_find_char_class(par_indented, pm), Np.class)
1003 set_attr(g, attr_icflag, BOXBDD)
1004 if getid(g)==id_glue and #Bp==0 then
1005 local h = node_new(id_penalty)
1006 setfield(h, 'penalty', 10000); set_attr(h, attr_icflag, BOXBDD)
1008 head = insert_before(head, Np.first, g)
1015 -- return value: (the initial cursor lp), (last node)
1018 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
1019 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
1020 local KSK = luatexja.stack_table_index.KSK
1021 local XSK = luatexja.stack_table_index.XSK
1022 local dir_yoko = luatexja.dir_table.dir_yoko
1023 local dir_tate = luatexja.dir_table.dir_tate
1024 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
1025 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
1026 local table_pool = {
1027 {}, {}, {first=nil},
1028 { auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
1029 first=nil, id=nil, last=nil, met=nil, nuc=nil,
1030 post=nil, pre=nil, xspc=nil, },
1031 { auto_kspc=nil, auto_xspc=nil, char=nil, class=nil,
1032 first=nil, id=nil, last=nil, met=nil, nuc=nil,
1033 post=nil, pre=nil, xspc=nil, },
1035 init_var = function (mode,dir)
1036 -- 1073741823: max_dimen
1037 Bp, widow_Bp, widow_Np, Np, Nq
1038 = table_pool[1], table_pool[2], table_pool[3], table_pool[4], table_pool[5]
1039 for i=1,5 do for j,_ in pairs(table_pool[i]) do table_pool[i][j]=nil end end
1040 table_current_stack = ltjs.table_current_stack
1042 list_dir, tex_dir = (ltjs.list_dir or dir_yoko), (dir or 'TLT')
1043 local is_dir_tate = list_dir==dir_tate
1044 capsule_glyph = is_dir_tate and ltjw.capsule_glyph_tate or ltjw.capsule_glyph_yoko
1045 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
1048 kanji_skip = node_new(id_glue); set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
1049 local s = skip_table_to_spec(KSK)
1050 setfield(kanji_skip, 'spec', s)
1051 get_kanjiskip = (getfield(s, 'width') == 1073741823)
1052 and get_kanjiskip_jfm or get_kanjiskip_normal
1056 xkanji_skip = node_new(id_glue); set_attr(xkanji_skip, attr_icflag, XKANJI_SKIP)
1057 local s = skip_table_to_spec(XSK)
1058 setfield(xkanji_skip, 'spec', s)
1059 get_xkanjiskip = (getfield(s, 'width') == 1073741823)
1060 and get_xkanjiskip_jfm or get_xkanjiskip_normal
1064 -- the current list is to be line-breaked:
1065 -- hbox from \parindent is skipped.
1066 local lp, par_indented, lpi, lps = head, 'boxbdd', getid(head), getsubtype(head)
1067 while lp and ((lpi==id_whatsit and lps~=sid_user)
1068 or ((lpi==id_hlist) and (lps==3))) do
1069 if (lpi==id_hlist) and (lps==3) then
1070 Np.char, par_indented = 'parbdd', 'parbdd'
1071 Np.width = getfield(lp, 'width')
1073 lp=node_next(lp); lpi, lps = getid(lp), getsubtype(lp) end
1074 return lp, node_tail(head), par_indented
1076 return head, nil, 'boxbdd'
1081 local ensure_tex_attr = ltjb.ensure_tex_attr
1082 local function cleanup(mode)
1083 -- adjust attr_icflag for avoiding error
1084 if tex.getattribute(attr_icflag)~=0 then ensure_tex_attr(attr_icflag, 0) end
1085 node_free(kanji_skip); node_free(xkanji_skip)
1088 local h = node_next(head)
1089 if getid(h) == id_penalty and getfield(h, 'penalty') == 10000 then
1091 if getid(h) == id_glue and getsubtype(h) == 15 and not node_next(h) then
1098 -------------------- 外部から呼ばれる関数
1101 function main(ahead, mode, dir)
1102 if not ahead then return ahead end
1104 local lp, last, par_indented = init_var(mode,dir)
1105 lp = calc_np(last, lp)
1107 handle_list_head(par_indented)
1108 lp = calc_np(last,lp); while Np do
1110 local pid, pm = Np.id, Np.met
1112 if pid == id_jglyph then
1113 handle_np_jachar(mode)
1115 if pid==id_hlist then handle_np_ja_hlist()
1116 else handle_np_jachar() end
1118 if Nq.id==id_hlist then handle_nq_ja_hlist()
1119 else handle_nq_jachar() end
1121 lp = calc_np(last,lp)
1123 handle_list_tail(mode)
1125 return cleanup(mode)
1130 local IHB = luatexja.userid_table.IHB
1131 local BPAR = luatexja.userid_table.BPAR
1132 local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
1133 local node_write = Dnode.write
1136 function create_inhibitglue_node()
1137 local tn = node_new(id_whatsit, sid_user)
1138 setfield(tn, 'user_id', IHB)
1139 setfield(tn, 'type', 100)
1140 setfield(tn, 'value', 1)
1144 -- Node for indicating beginning of a paragraph
1145 -- (for ltjsclasses)
1146 function create_beginpar_node()
1147 local tn = node_new(id_whatsit, sid_user)
1148 setfield(tn, 'user_id', BPAR)
1149 setfield(tn, 'type', 100)
1150 setfield(tn, 'value', 1)
1154 local function whatsit_callback(Np, lp, Nq)
1155 if Np and Np.nuc then return Np
1156 elseif Np and getfield(lp, 'user_id') == BPAR then
1157 Np.first = lp; Np.nuc = lp; Np.last = lp
1162 local function whatsit_after_callback(s, Nq, Np)
1163 if not s and getfield(Nq.nuc, 'user_id') == BPAR then
1164 local x, y = node_prev(Nq.nuc), Nq.nuc
1165 Nq.first, Nq.nuc, Nq.last = x, x, x
1168 Nq.class = fast_find_char_class('parbdd', Np.met)
1170 Nq.met = Np.met; Nq.pre = 0; Nq.post = 0; Nq.xspc = 0
1171 Nq.auto_xspc = false
1173 head = node_remove(head, y)
1179 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_getinfo", whatsit_callback,
1180 "luatexja.beginpar.np_info", 1)
1181 luatexbase.add_to_callback("luatexja.jfmglue.whatsit_after", whatsit_after_callback,
1182 "luatexja.beginpar.np_info_after", 1)