-- -- ltj-charrange.lua -- luatexbase.provides_module({ name = 'luatexja.charrange', date = '2022-08-19', description = 'Handling the range of Japanese characters', }) luatexja.charrange = {} luatexja.load_module 'base'; local ltjb = luatexja.base local getchar = node.direct.getchar local get_attr = node.direct.get_attribute local get_attr_node = node.get_attribute local tex_getattr = tex.getattribute local UNSET = -0x7FFFFFFF local ATTR_RANGE = 7 luatexja.charrange.ATTR_RANGE = ATTR_RANGE local jcr_cjk, jcr_noncjk = 0, 1 local floor = math.floor 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 do local ka = luatexbase.attributes['ltj@kcat0'] for i = 0, 30 do local pw = 2^i; kcat_attr_table[i], pow_table[i] = ka, pw fn_table[i] = function(p) return get_attr(p, ka)&pw==0 end nfn_table[i] = function(p) return get_attr_node(p, ka)&pw==0 end end end for i = 31, 31*ATTR_RANGE-1 do local ka, pw = luatexbase.attributes['ltj@kcat'..floor(i/31)], 2^(i%31) kcat_attr_table[i], pow_table[i] = ka, pw fn_table[i] = function(p) return (get_attr(p, ka) or 0)&pw==0 end nfn_table[i] = function(p) return (get_attr_node(p, ka) or 0)&pw==0 end end fn_table[-1] = function() return false end -- for char --U+007F nfn_table[-1] = function() return false end -- for char --U+007F -- 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 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 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 .. ")", "A character range number should be in the range 1.." .. 31*ATTR_RANGE .. ",\n" .. "ignored.") return elseif b<0x80 or e>=ucs_out then ltjb.package_warning('luatexja', 'bad character range ([' .. b .. ',' .. e .. ']). ' .. 'I take the intersection with [0x80, 0x10ffff].') elseif b>e then b, e = e, b end if ind == 31*ATTR_RANGE then ind=0 end for i=math.max(0x80,b),math.min(ucs_out-1,e) do jcr_table_main[i]=ind end 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 local function get_range_setting(i) -- i: internal range number local a = tex_getattr(kcat_attr_table[i]) return (a==UNSET and 0 or a)&pow_table[i] 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 luatexja.charrange.is_ucs_in_japanese_char_direct(p ,c) return fn_table[jcr_table_main[c or getchar(p)]](p) end function luatexja.charrange.is_japanese_char_curlist(c) -- assume that c>=0x80 return get_range_setting(jcr_table_main[c])==0 end -- EXT 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).. ")", "A character range number must be a number, ignored.") elseif i==0 then return else local kc if i>0 then kc=0 else kc=1; i=-i end; if i>=31*ATTR_RANGE then i=0 end local attr, p = kcat_attr_table[i], pow_table[i] local a = tex_getattr(attr); if a==UNSET then a=0 end a = (a&~p)+kc*p; if a==0 and i>30 then a=UNSET end tex.setattribute(g, attr, a) end end luatexja.charrange.get_range_setting=get_range_setting -- EOF