2 -- luatexja/charrange.lua
4 luatexbase.provides_module({
5 name = 'luatexja.charrange',
7 description = 'Handling the range of Japanese characters',
9 luatexja.charrange = {}
10 luatexja.load_module('base'); local ltjb = luatexja.base
12 local getchar = node.direct.getchar
13 local has_attr = node.direct.has_attribute
14 local has_attr_node = node.has_attribute
15 local tex_getattr = tex.getattribute
18 luatexja.charrange.ATTR_RANGE = ATTR_RANGE
19 local jcr_cjk, jcr_noncjk = 0, 1
20 local floor = math.floor
22 local kcat_attr_table = {}
24 local fn_table = {} -- used in is_ucs_in_japanese_char_direct
25 local nfn_table = {} -- used in is_ucs_in_japanese_char_node
26 for i = 0, 31*ATTR_RANGE-1 do
27 local ka, pw = luatexbase.attributes['ltj@kcat'..floor(i/31)], 1/pow(2, i%31)
28 local jcr_noncjk = jcr_noncjk
29 kcat_attr_table[i], pow_table[i] = ka, pow(2, i%31)
30 fn_table[i] = function(p) return floor(has_attr(p, ka)*pw)%2 ~= jcr_noncjk end
31 nfn_table[i] = function(p) return floor(has_attr_node(p, ka)*pw)%2 ~= jcr_noncjk end
33 fn_table[-1] = function() return false end -- for char --U+007F
34 nfn_table[-1] = function() return false end -- for char --U+007F
35 pow_table[31*ATTR_RANGE] = pow(2, 31)
37 -- jcr_table_main[chr_code] = index
38 -- index : internal 0, 1, 2, ..., 216 0: 'other'
39 -- external 217, 1 2 216, 217 and (out of range): 'other'
42 local jcr_table_main = {}
43 local ucs_out = 0x110000
45 for i=0x0 ,0x7F do jcr_table_main[i]=-1 end
46 for i=0x80 ,0xFF do jcr_table_main[i]=1 end
47 for i=0x100,ucs_out-1 do jcr_table_main[i]=0 end
49 -- EXT: add characters to a range
50 function luatexja.charrange.add_char_range(b,e,ind) -- ind: external range number
51 if not ind or ind<0 or ind>31*ATTR_RANGE then -- 0 はエラーにしない(隠し)
52 ltjb.package_error('luatexja',
53 "invalid character range number (" .. ind .. ")",
54 "A character range number should be in the range 1.."
55 .. 31*ATTR_RANGE .. ",\n" ..
58 elseif b<0x80 or e>=ucs_out then
59 ltjb.package_warning('luatexja',
60 'bad character range ([' .. b .. ',' .. e .. ']). ' ..
61 'I take the intersection with [0x80, 0x10ffff].')
65 if ind == 31*ATTR_RANGE then ind=0 end
66 for i=math.max(0x80,b),math.min(ucs_out-1,e) do
71 function luatexja.charrange.char_to_range(c) -- return the external range number
72 local r = jcr_table_main[ltjb.in_unicode(c, false)] or 217
73 return (r~=0) and r or 217
76 local function get_range_setting(i) -- i: internal range number
77 return floor(tex_getattr(kcat_attr_table[i])/pow_table[i])%2
80 -- glyph_node p は和文文字か?
81 function luatexja.charrange.is_ucs_in_japanese_char(p)
82 return nfn_table[jcr_table_main[c or p.char]](p)
85 function luatexja.charrange.is_ucs_in_japanese_char_direct(p ,c)
86 return fn_table[jcr_table_main[c or getchar(p)]](p)
89 function luatexja.charrange.is_japanese_char_curlist(c) -- assume that c>=0x80
90 return get_range_setting(jcr_table_main[c])~= jcr_noncjk
94 function luatexja.charrange.toggle_char_range(g, i) -- i: external range number
95 if type(i)~='number' then
96 ltjb.package_error('luatexja',
97 "invalid character range number (" .. tostring(i).. ")",
98 "A character range number must be a number, ignored.")
99 elseif i==0 then return
102 if i>0 then kc=0 else kc=1; i=-i end
103 if i>=7*ATTR_RANGE then i=0 end
104 local attr = kcat_attr_table[i]
105 local a = tex_getattr(attr)
106 tex.setattribute(g, attr,
107 (floor(a/pow_table[i+1])*2+kc)*pow_table[i]+a%pow_table[i])
111 luatexja.charrange.get_range_setting=get_range_setting