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 require('luatexja.charrange'); local ltjc = luatexja.charrange
14 require('luatexja.jfont'); local ltjf = luatexja.jfont
15 require('luatexja.stack'); local ltjs = luatexja.stack
17 local has_attr = node.has_attribute
18 local set_attr = node.set_attribute
19 local unset_attr = node.unset_attribute
20 local node_remove = node.remove
21 local node_next = node.next
23 local id_glyph = node.id('glyph')
24 local id_whatsit = node.id('whatsit')
25 local sid_user = node.subtype('user_defined')
27 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
28 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
29 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
30 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
32 local lang_ja_token = token.create('ltj@japanese')
33 local lang_ja = lang_ja_token[2]
35 ------------------------------------------------------------------------
36 -- MAIN PROCESS STEP 1: replace fonts
37 ------------------------------------------------------------------------
39 -- This is used in jfmglue.lua.
41 local function suppress_hyphenate_ja(head)
42 for p in node.traverse_id(id_glyph, head) do
43 if ltjc.is_ucs_in_japanese_char(p) then
44 local v = has_attr(p, attr_curjfnt)
47 set_attr(p, attr_jchar_class,
48 ltjf.find_char_class(p.char, ltjf.font_metric_table[v].jfm))
50 v = has_attr(p, attr_ykblshift)
52 set_attr(p, attr_yablshift, v)
54 unset_attr(p, attr_yablshift)
56 if p.subtype%2==1 then p.subtype = p.subtype - 1 end
64 -- mode: true iff this function is called from hpack_filter
65 function set_box_stack_level(head, mode)
68 local cl = tex.currentgrouplevel + 1
69 for p in node.traverse_id(id_whatsit, head) do
70 if p.subtype==sid_user and p.user_id==30112 then
72 if mode and g.value==cl then box_set = true end
73 head, p = node_remove(head, g); break
77 box_stack_level = tex.getcount('ltj@@stack') + 1
79 box_stack_level = tex.getcount('ltj@@stack')
85 luatexbase.add_to_callback('hpack_filter',
87 return set_box_stack_level(head, true)
88 end,'ltj.hpack_filter_pre',1)
89 luatexbase.add_to_callback('pre_linebreak_filter',
91 return set_box_stack_level(head, false)
92 end,'ltj.pre_linebreak_filter_pre',1)
93 luatexbase.add_to_callback('hyphenate',
95 return suppress_hyphenate_ja(head)