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
25 local tex_getcount = tex.getcount
27 local id_glyph = node.id('glyph')
28 local id_math = node.id('math')
29 local id_whatsit = node.id('whatsit')
30 local sid_user = node.subtype('user_defined')
32 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
33 local attr_icflag = luatexbase.attributes['ltj@icflag']
35 local ltjf_font_metric_table = ltjf.font_metric_table
36 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
37 local attr_orig_char = luatexbase.attributes['ltj@origchar']
39 ------------------------------------------------------------------------
40 -- MAIN PROCESS STEP 1: replace fonts
41 ------------------------------------------------------------------------
44 local function suppress_hyphenate_ja(head)
45 local non_math, p = true, head
49 if pid == id_glyph then
50 if (has_attr(p, attr_icflag) or 0)<=0 and ltjc_is_ucs_in_japanese_char(p) then
51 p.font = has_attr(p, attr_curjfnt) or p.font
52 p.subtype = floor(p.subtype*0.5)*2
53 set_attr(p, attr_orig_char, p.char)
55 elseif pid == id_math then
56 p = node_next(p) -- skip math on
57 while p and p.id~=id_math do p = node_next(p) end
58 elseif pid == id_whatsit and p.subtype==sid_user and p.user_id==30112 then
59 wt[#wt+1] = p; head = node_remove(head, p)
67 -- mode: true iff this function is called from hpack_filter
68 function set_box_stack_level(head, mode)
69 local box_set, cl = 0, tex.currentgrouplevel + 1
70 for _,p in pairs(wt) do
71 if mode and p.value==cl then box_set = 1 end; node_free(p)
73 ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
78 luatexbase.add_to_callback('hpack_filter',
80 return set_box_stack_level(head, true)
81 end,'ltj.hpack_filter_pre',1)
82 luatexbase.add_to_callback('pre_linebreak_filter',
84 return set_box_stack_level(head, false)
85 end,'ltj.pre_linebreak_filter_pre',1)
86 luatexbase.add_to_callback('hyphenate',
88 return suppress_hyphenate_ja(head)