2 -- luatexja/ltj-pretreat.lua
5 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
8 local floor = math.floor
9 local has_attr = node.has_attribute
10 local set_attr = node.set_attribute
11 local node_traverse = node.traverse
12 local node_type = node.type
13 local node_remove = node.remove
14 local node_next = node.next
15 local node_free = node.free
16 local tex_getcount = tex.getcount
18 local id_glyph = node.id('glyph')
19 local id_math = node.id('math')
20 local id_whatsit = node.id('whatsit')
21 local sid_user = node.subtype('user_defined')
23 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
24 local attr_icflag = luatexbase.attributes['ltj@icflag']
26 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
27 local attr_orig_char = luatexbase.attributes['ltj@origchar']
28 local STCK = luatexja.userid_table.STCK
30 ------------------------------------------------------------------------
31 -- MAIN PROCESS STEP 1: replace fonts
32 ------------------------------------------------------------------------
35 local function suppress_hyphenate_ja(head)
36 local non_math, p = true, head
40 if pid == id_glyph then
41 if (has_attr(p, attr_icflag) or 0)<=0 and ltjc_is_ucs_in_japanese_char(p) then
42 p.font = has_attr(p, attr_curjfnt) or p.font
43 p.subtype = floor(p.subtype*0.5)*2
44 set_attr(p, attr_orig_char, p.char)
46 elseif pid == id_math then
47 p = node_next(p) -- skip math on
48 while p and p.id~=id_math do p = node_next(p) end
49 elseif pid == id_whatsit and p.subtype==sid_user and p.user_id==STCK then
50 wt[#wt+1] = p; head = node_remove(head, p)
58 -- mode: true iff this function is called from hpack_filter
59 local function set_box_stack_level(head, mode)
60 local box_set, cl = 0, tex.currentgrouplevel + 1
61 for _,p in pairs(wt) do
62 if mode and p.value==cl then box_set = 1 end; node_free(p)
64 ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
69 luatexbase.add_to_callback('hpack_filter',
71 return set_box_stack_level(head, true)
72 end,'ltj.hpack_filter_pre',1)
73 luatexbase.add_to_callback('pre_linebreak_filter',
75 return set_box_stack_level(head, false)
76 end,'ltj.pre_linebreak_filter_pre',1)
77 luatexbase.add_to_callback('hyphenate',
79 return suppress_hyphenate_ja(head)
83 set_box_stack_level = set_box_stack_level,