4 luatexbase.provides_module({
5 name = 'luatexja.math',
8 description = 'Handling routines for Japanese characters in math mode',
10 module('luatexja.math', package.seeall)
12 require('luatexja.base'); local ltjb = luatexja.base
13 require('luatexja.charrange'); local ltjc = luatexja.charrange
14 require('luatexja.jfont'); local ltjf = luatexja.jfont
15 require('luatexja.stack'); local ltjs = luatexja.stack
16 require('luatexja.setwidth'); local ltjw = luatexja.setwidth
18 local node_new = node.new
19 local node_next = node.next
20 local node_free = node.free
21 local has_attr = node.has_attribute
22 local set_attr = node.set_attribute
24 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
25 local attr_icflag = luatexbase.attributes['ltj@icflag']
26 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
27 local attr_jfam = luatexbase.attributes['jfam']
28 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
30 local id_glyph = node.id('glyph')
31 local id_hlist = node.id('hlist')
32 local id_vlist = node.id('vlist')
33 local id_mchar = node.id('math_char')
34 local id_sub_box = node.id('sub_box')
35 local id_radical = node.id('radical')
36 local id_choice = node.id('choice')
37 local id_accent = node.id('accent')
38 local id_style = node.id('style')
39 local id_frac = node.id('fraction')
40 local id_simple = node.id('noad')
41 local id_sub_mlist = node.id('sub_mlist')
45 local conv_jchar_to_hbox_A
47 -- sty : 0 (display or text), 1 (script), >=2 (scriptscript)
48 local function conv_jchar_to_hbox(head, sty)
52 if p.id == id_simple or p.id == id_accent then
53 p.nucleus = conv_jchar_to_hbox_A(p.nucleus, sty)
54 p.sub = conv_jchar_to_hbox_A(p.sub, sty + 1)
55 p.sup = conv_jchar_to_hbox_A(p.sup, sty + 1)
56 elseif p.id == id_choice then
57 p.text = conv_jchar_to_hbox(p.text, 0)
58 p.script = conv_jchar_to_hbox(p.script, 1)
59 p.scriptscript = conv_jchar_to_hbox(p.scriptscript, 2)
60 elseif p.id == id_frac then
61 p.num = conv_jchar_to_hbox_A(p.num, sty + 1)
62 p.denom = conv_jchar_to_hbox_A(p.denom, sty + 1)
63 elseif p.id == id_radical then
64 p.nucleus = conv_jchar_to_hbox_A(p.nucleus, sty)
65 p.sub = conv_jchar_to_hbox_A(p.sub, sty + 1)
66 p.sup = conv_jchar_to_hbox_A(p.sup, sty + 1)
68 p.degree = conv_jchar_to_hbox_A(p.degree, sty + 1)
70 elseif p.id == id_style then
71 if p.style == "display'" or p.style == 'display'
72 or p.style == "text'" or p.style == 'text' then
74 elseif p.style == "script'" or p.style == 'script' then
84 conv_jchar_to_hbox_A =
86 if not p then return nil
87 elseif p.id == id_sub_mlist then
89 p.head = conv_jchar_to_hbox(p.head, sty)
91 elseif p.id == id_mchar then
92 local fam = has_attr(p, attr_jfam) or -1
93 if ltjc.is_ucs_in_japanese_char(p) and fam>=0 then
95 if sty == 0 then mode = 'mjtext'
96 elseif sty == 1 then mode = 'mjscr'
98 local f = ltjs.get_penalty_table(mode, fam, -1, tex.getcount('ltj@@stack'))
100 local q = node_new(id_sub_box)
101 local r = node_new(id_glyph); r.next = nil
102 r.char = p.char; r.font = f; r.subtype = 256
103 set_attr(r, attr_icflag, PROCESSED)
104 set_attr(r, attr_yablshift, 0)
105 local class = ltjf.find_char_class(p.char, ltjf.font_metric_table[f].jfm)
106 set_attr(r, attr_jchar_class, class)
107 local met = ltjf.font_metric_table[f]
108 ltjw.char_data = ltjf.metrics[met.jfm].size_cache[met.size].char_type[class]
109 ltjw.head = r; ltjw.capsule_glyph(r, tex.mathdir , true);
110 q.head = ltjw.head; node_free(p); p=q;
117 luatexbase.add_to_callback('mlist_to_hlist',
118 function (n, display_type, penalties)
119 local head = conv_jchar_to_hbox(n, 0);
120 head = node.mlist_to_hlist(head, display_type, penalties)
122 end,'ltj.mlist_to_hlist', 1)