--
--- luatexja/charrange.lua
+-- ltj-charrange.lua
--
luatexbase.provides_module({
name = 'luatexja.charrange',
- date = '2014/01/19',
+ date = '2019/09/26',
description = 'Handling the range of Japanese characters',
})
-module('luatexja.charrange', package.seeall)
-local err, warn, info, log = luatexbase.errwarinf(_NAME)
-
+luatexja.charrange = {}
luatexja.load_module('base'); local ltjb = luatexja.base
-local Dnode = node.direct or node
-local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
-local has_attr = Dnode.has_attribute
+local getchar = node.direct.getchar
+local has_attr = node.direct.has_attribute
local has_attr_node = node.has_attribute
+local tex_getattr = tex.getattribute
-ATTR_RANGE = 7
+local ATTR_RANGE = 7
+luatexja.charrange.ATTR_RANGE = ATTR_RANGE
+local jcr_cjk, jcr_noncjk = 0, 1
local floor = math.floor
-local pow = math.pow
local kcat_attr_table = {}
local pow_table = {}
+local fn_table = {} -- used in is_ucs_in_japanese_char_direct
+local nfn_table = {} -- used in is_ucs_in_japanese_char_node
for i = 0, 31*ATTR_RANGE-1 do
- kcat_attr_table[i] = luatexbase.attributes['ltj@kcat'..floor(i/31)]
- pow_table[i] = pow(2, i%31)
+ local ka, pw = luatexbase.attributes['ltj@kcat'..floor(i/31)], 1/(2^(i%31))
+ local jcr_noncjk = jcr_noncjk
+ kcat_attr_table[i], pow_table[i] = ka, 2^(i%31)
+ fn_table[i] = function(p) return floor(has_attr(p, ka)*pw)%2 ~= jcr_noncjk end
+ nfn_table[i] = function(p) return floor(has_attr_node(p, ka)*pw)%2 ~= jcr_noncjk end
end
-pow_table[31*ATTR_RANGE] = pow(2, 31)
+fn_table[-1] = function() return false end -- for char --U+007F
+nfn_table[-1] = function() return false end -- for char --U+007F
+pow_table[31*ATTR_RANGE] = 2^31
-- jcr_table_main[chr_code] = index
-- index : internal 0, 1, 2, ..., 216 0: 'other'
-- external 217, 1 2 216, 217 and (out of range): 'other'
-- initialize
-jcr_table_main = {}
-local jcr_table_main = jcr_table_main
-local jcr_cjk = 0; local jcr_noncjk = 1; local ucs_out = 0x110000
+local jcr_table_main = {}
+local ucs_out = 0x110000
+for i=0x0 ,0x7F do jcr_table_main[i]=-1 end
for i=0x80 ,0xFF do jcr_table_main[i]=1 end
for i=0x100,ucs_out-1 do jcr_table_main[i]=0 end
-- EXT: add characters to a range
-function add_char_range(b,e,ind) -- ind: external range number
+function luatexja.charrange.add_char_range(b,e,ind) -- ind: external range number
if not ind or ind<0 or ind>31*ATTR_RANGE then -- 0 はエラーにしない（隠し）
ltjb.package_error('luatexja',
"invalid character range number (" .. ind .. ")",
end
end
-function char_to_range(c) -- return the external range number
- c=ltjb.in_unicode(c, false)
- if c<0x80 then return -1
- else
- local r = jcr_table_main[c] or 217
- return (r and r~=0) and r or 217
- end
+function luatexja.charrange.char_to_range(c) -- return the external range number
+ local r = jcr_table_main[ltjb.in_unicode(c, false)] or 217
+ return (r~=0) and r or 217
end
-function get_range_setting(i) -- i: internal range number
- return floor(tex.getattribute(kcat_attr_table[i])/pow_table[i])%2
+local function get_range_setting(i) -- i: internal range number
+ return floor(tex_getattr(kcat_attr_table[i])/pow_table[i])%2
end
-- glyph_node p は和文文字か？
+function luatexja.charrange.is_ucs_in_japanese_char(p)
+ return nfn_table[jcr_table_main[c or p.char]](p)
+end
-function is_ucs_in_japanese_char_node(p)
- local c = p.char
- if c<0x80 then
- return false
- else
- local i=jcr_table_main[c]
- return (floor(
- has_attr_node(p, kcat_attr_table[i])/pow_table[i])%2 ~= jcr_noncjk)
- end
+function luatexja.charrange.is_ucs_in_japanese_char_direct(p ,c)
+ return fn_table[jcr_table_main[c or getchar(p)]](p)
end
-is_ucs_in_japanese_char = is_ucs_in_japanese_char_node
-function is_ucs_in_japanese_char_direct(p)
- local c = getchar(p)
- if c<0x80 then
- return false
- else
- local i=jcr_table_main[c]
- return (floor(
- has_attr(p, kcat_attr_table[i])/pow_table[i])%2 ~= jcr_noncjk)
- end
+function luatexja.charrange.is_japanese_char_curlist(c) -- assume that c>=0x80
+ return get_range_setting(jcr_table_main[c])~= jcr_noncjk
end
-- EXT
-function toggle_char_range(g, i) -- i: external range number
+function luatexja.charrange.toggle_char_range(g, i) -- i: external range number
if type(i)~='number' then
ltjb.package_error('luatexja',
"invalid character range number (" .. tostring(i).. ")",
else
local kc
if i>0 then kc=0 else kc=1; i=-i end
- if i>=7*ATTR_RANGE then i=0 end
+ if i>=31*ATTR_RANGE then i=0 end
local attr = kcat_attr_table[i]
- local a = tex.getattribute(attr)
- tex.setattribute(g,attr,(floor(a/pow_table[i+1])*2+kc)*pow_table[i]+a%pow_table[i])
+ local a = tex_getattr(attr)
+ tex.setattribute(g, attr,
+ (floor(a/pow_table[i+1])*2+kc)*pow_table[i]+a%pow_table[i])
end
end
+luatexja.charrange.get_range_setting=get_range_setting
+
-- EOF
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