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 has_attr = node.has_attribute
18 local set_attr = node.set_attribute
19 local unset_attr = node.unset_attribute
20 local node_type = node.type
21 local node_remove = node.remove
22 local node_next = node.next
23 local node_free = node.free
25 local id_glyph = node.id('glyph')
26 local id_math = node.id('math')
27 local id_whatsit = node.id('whatsit')
28 local sid_user = node.subtype('user_defined')
30 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
31 local attr_icflag = luatexbase.attributes['ltj@icflag']
32 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
33 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
35 local ltjf_font_metric_table = ltjf.font_metric_table
37 ------------------------------------------------------------------------
38 -- MAIN PROCESS STEP 1: replace fonts
39 ------------------------------------------------------------------------
41 -- This is used in jfmglue.lua.
43 local function suppress_hyphenate_ja(head)
45 for p in node.traverse(head) do
46 if p.id == id_glyph and non_math then
47 local i = has_attr(p, attr_icflag) or 0
48 if i==0 and ltjc.is_ucs_in_japanese_char(p) then
49 local v = has_attr(p, attr_curjfnt)
53 v = has_attr(p, attr_ykblshift)
55 set_attr(p, attr_yablshift, v)
57 unset_attr(p, attr_yablshift)
59 if p.subtype%2==1 then p.subtype = p.subtype - 1 end
62 elseif p.id == id_math then
63 non_math = (p.subtype ~= 0)
70 -- mode: true iff this function is called from hpack_filter
71 function set_box_stack_level(head, mode)
74 local cl = tex.currentgrouplevel + 1
75 for p in node.traverse_id(id_whatsit, head) do
76 if p.subtype==sid_user and p.user_id==30112 then
78 if mode and g.value==cl then box_set = true end
79 head, p = node_remove(head, g); node_free(g); break
83 box_stack_level = tex.getcount('ltj@@stack') + 1
85 box_stack_level = tex.getcount('ltj@@stack')
91 luatexbase.add_to_callback('hpack_filter',
93 return set_box_stack_level(head, true)
94 end,'ltj.hpack_filter_pre',1)
95 luatexbase.add_to_callback('pre_linebreak_filter',
97 return set_box_stack_level(head, false)
98 end,'ltj.pre_linebreak_filter_pre',1)
99 luatexbase.add_to_callback('hyphenate',
101 return suppress_hyphenate_ja(head)