2 -- luatexja/charrange.lua
4 luatexbase.provides_module({
5 name = 'luatexja.charrange',
7 description = 'Handling the range of Japanese characters',
9 module('luatexja.charrange', package.seeall)
10 local err, warn, info, log = luatexbase.errwarinf(_NAME)
12 luatexja.load_module('base'); local ltjb = luatexja.base
14 local getchar = node.direct.getchar
15 local has_attr = node.direct.has_attribute
16 local has_attr_node = node.has_attribute
17 local tex_getattr = tex.getattribute
20 local jcr_cjk, jcr_noncjk = 0, 1
21 local floor = math.floor
23 local kcat_attr_table = {}
25 local fn_table = {} -- used in is_ucs_in_japanese_char_direct
26 local nfn_table = {} -- used in is_ucs_in_japanese_char_node
27 for i = 0, 31*ATTR_RANGE-1 do
28 local ka, pw = luatexbase.attributes['ltj@kcat'..floor(i/31)], 1/pow(2, i%31)
29 local jcr_noncjk = jcr_noncjk
30 kcat_attr_table[i], pow_table[i] = ka, pow(2, i%31)
31 fn_table[i] = function(p) return floor(has_attr(p, ka)*pw)%2 ~= jcr_noncjk end
32 nfn_table[i] = function(p) return floor(has_attr_node(p, ka)*pw)%2 ~= jcr_noncjk end
34 fn_table[-1] = function() return false end -- for char --U+007F
35 nfn_table[-1] = function() return false end -- for char --U+007F
36 pow_table[31*ATTR_RANGE] = pow(2, 31)
38 -- jcr_table_main[chr_code] = index
39 -- index : internal 0, 1, 2, ..., 216 0: 'other'
40 -- external 217, 1 2 216, 217 and (out of range): 'other'
44 local jcr_table_main = jcr_table_main
45 local ucs_out = 0x110000
47 for i=0x0 ,0x7F do jcr_table_main[i]=-1 end
48 for i=0x80 ,0xFF do jcr_table_main[i]=1 end
49 for i=0x100,ucs_out-1 do jcr_table_main[i]=0 end
51 -- EXT: add characters to a range
52 function add_char_range(b,e,ind) -- ind: external range number
53 if not ind or ind<0 or ind>31*ATTR_RANGE then -- 0 はエラーにしない(隠し)
54 ltjb.package_error('luatexja',
55 "invalid character range number (" .. ind .. ")",
56 "A character range number should be in the range 1.."
57 .. 31*ATTR_RANGE .. ",\n" ..
60 elseif b<0x80 or e>=ucs_out then
61 ltjb.package_warning('luatexja',
62 'bad character range ([' .. b .. ',' .. e .. ']). ' ..
63 'I take the intersection with [0x80, 0x10ffff].')
67 if ind == 31*ATTR_RANGE then ind=0 end
68 for i=math.max(0x80,b),math.min(ucs_out-1,e) do
73 function char_to_range(c) -- return the external range number
74 local r = jcr_table_main[ltjb.in_unicode(c, false)] or 217
75 return (r~=0) and r or 217
78 function get_range_setting(i) -- i: internal range number
79 return floor(tex_getattr(kcat_attr_table[i])/pow_table[i])%2
82 -- glyph_node p は和文文字か?
83 function is_ucs_in_japanese_char_node(p)
84 return nfn_table[jcr_table_main[c or p.char]](p)
86 is_ucs_in_japanese_char = is_ucs_in_japanese_char_node
87 -- only ltj-otf.lua uses this version
89 function is_ucs_in_japanese_char_direct(p ,c)
90 return fn_table[jcr_table_main[c or getchar(p)]](p)
93 function is_japanese_char_curlist(c) -- assume that c>=0x80
94 return get_range_setting(jcr_table_main[c])~= jcr_noncjk
98 function toggle_char_range(g, i) -- i: external range number
99 if type(i)~='number' then
100 ltjb.package_error('luatexja',
101 "invalid character range number (" .. tostring(i).. ")",
102 "A character range number must be a number, ignored.")
103 elseif i==0 then return
106 if i>0 then kc=0 else kc=1; i=-i end
107 if i>=7*ATTR_RANGE then i=0 end
108 local attr = kcat_attr_table[i]
109 local a = tex_getattr(attr)
110 tex.setattribute(g, attr,
111 (floor(a/pow_table[i+1])*2+kc)*pow_table[i]+a%pow_table[i])