2 -- luatexja/pretreat.lua
4 luatexbase.provides_module({
5 name = 'luatexja.pretreat',
10 module('luatexja.pretreat', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
14 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
15 luatexja.load_module('stack'); local ltjs = luatexja.stack
17 local floor = math.floor
18 local has_attr = node.has_attribute
19 local set_attr = node.set_attribute
20 local node_traverse = node.traverse
21 local node_type = node.type
22 local node_remove = node.remove
23 local node_next = node.next
24 local node_free = node.free
26 local id_glyph = node.id('glyph')
27 local id_math = node.id('math')
28 local id_whatsit = node.id('whatsit')
29 local sid_user = node.subtype('user_defined')
31 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
32 local attr_icflag = luatexbase.attributes['ltj@icflag']
33 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
34 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
36 local ltjf_font_metric_table = ltjf.font_metric_table
37 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
38 local attr_orig_char = luatexbase.attributes['ltj@origchar']
39 local ltjf_find_char_class = ltjf.find_char_class
41 ------------------------------------------------------------------------
42 -- MAIN PROCESS STEP 1: replace fonts
43 ------------------------------------------------------------------------
45 -- This is used in jfmglue.lua.
47 local function suppress_hyphenate_ja(head)
49 for p in node_traverse(head) do
50 if p.id == id_glyph and non_math then
51 if (has_attr(p, attr_icflag) or 0)<=0 and ltjc_is_ucs_in_japanese_char(p) then
52 p.font = has_attr(p, attr_curjfnt) or p.font
53 set_attr(p, attr_orig_char, p.char)
54 set_attr(p, attr_yablshift, has_attr(p, attr_ykblshift) or 0)
55 p.subtype = floor(p.subtype/2)*2
57 elseif p.id == id_math then
58 non_math = (p.subtype ~= 0)
65 -- mode: true iff this function is called from hpack_filter
66 function set_box_stack_level(head, mode)
69 local cl = tex.currentgrouplevel + 1
70 for p in node.traverse_id(id_whatsit, head) do
71 if p.subtype==sid_user and p.user_id==30112 then
73 if mode and g.value==cl then box_set = true end
74 head, p = node_remove(head, g); node_free(g); break
77 box_stack_level = tex.getcount('ltj@@stack') + (box_set and 1 or 0)
82 luatexbase.add_to_callback('hpack_filter',
84 return set_box_stack_level(head, true)
85 end,'ltj.hpack_filter_pre',1)
86 luatexbase.add_to_callback('pre_linebreak_filter',
88 return set_box_stack_level(head, false)
89 end,'ltj.pre_linebreak_filter_pre',1)
90 luatexbase.add_to_callback('hyphenate',
92 return suppress_hyphenate_ja(head)