2 -- luatexja/charrange.lua
4 luatexbase.provides_module({
5 name = 'luatexja.charrange',
8 description = 'Handling the range of Japanese characters',
10 module('luatexja.charrange', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 luatexja.load_module('base'); local ltjb = luatexja.base
15 local floor = math.floor
16 local has_attr = node.has_attribute
18 -- jcr_table_main[chr_code] = index
19 -- index : internal 0, 1, 2, ..., 216 0: 'other'
20 -- external 1 2 216, (out of range): 'other'
23 local jcr_table_main = {}
24 local jcr_cjk = 0; local jcr_noncjk = 1; local ucs_out = 0x110000
26 for i=0x80 ,0xFF do jcr_table_main[i]=1 end
27 for i=0x100,ucs_out-1 do jcr_table_main[i]=0 end
29 -- EXT: add characters to a range
30 function add_char_range(b,e,ind) -- ind: external range number
31 if not ind or ind<0 or ind>216 then
32 ltjb.package_error('luatexja',
33 "invalid character range number (" .. ind .. ")",
34 {"A character range number should be in the range 1..216,",
37 elseif b<0x80 or e>=ucs_out then
38 ltjb.package_warning('luatexja',
39 'bad character range ([' .. b .. ',' .. e .. ']). ' ..
40 'I take the intersection with [0x80, 0x10ffff].')
44 for i=math.max(0x80,b),math.min(ucs_out-1,e) do
49 function char_to_range(c) -- return the (external) range number
50 if c<0 or c>0x10FFFF then
51 ltjb.package_error('luatexja',
52 'bad character code (' .. c .. ')',
53 {'A character number must be between 0 and 0x10ffff.',
54 'So I changed this one to zero.'})
56 elseif c<0x80 then return -1
58 local i = jcr_table_main[c] or 0
59 if i==0 then return 217 else return i end
63 function get_range_setting(i) -- i: internal range number
64 return floor(tex.getattribute(
65 luatexbase.attributes['ltj@kcat'..floor(i/31)])
69 -- glyph_node p は和文文字か?
70 function is_ucs_in_japanese_char(p)
72 if c<0x80 then return false
74 local i=jcr_table_main[c]
76 has_attr(p, luatexbase.attributes['ltj@kcat'..floor(i/31)])
77 /math.pow(2, i%31))%2 ~= jcr_noncjk)
82 function toggle_char_range(g, i) -- i: external range number
86 if i>0 then kc=0 else kc=1; i=-i end
88 local attr = luatexbase.attributes['ltj@kcat'..floor(i/31)]
89 local a = tex.getattribute(attr)
90 local k = math.pow(2, i%31)
91 tex.setattribute(g,attr,(floor(a/k/2)*2+kc)*k+a%k)