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Diffstat (limited to 'Master/texmf-dist/tex/luatex/luatexja/ltj-charrange.lua')
-rw-r--r-- | Master/texmf-dist/tex/luatex/luatexja/ltj-charrange.lua | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/luatex/luatexja/ltj-charrange.lua b/Master/texmf-dist/tex/luatex/luatexja/ltj-charrange.lua new file mode 100644 index 00000000000..8608300357d --- /dev/null +++ b/Master/texmf-dist/tex/luatex/luatexja/ltj-charrange.lua @@ -0,0 +1,95 @@ +-- +-- luatexja/charrange.lua +-- +luatexbase.provides_module({ + name = 'luatexja.charrange', + date = '2011/04/01', + version = '0.1', + description = 'Handling the range of Japanese characters', +}) +module('luatexja.charrange', package.seeall) +local err, warn, info, log = luatexbase.errwarinf(_NAME) + +luatexja.load_module('base'); local ltjb = luatexja.base + +local floor = math.floor +local has_attr = node.has_attribute + +-- jcr_table_main[chr_code] = index +-- index : internal 0, 1, 2, ..., 216 0: 'other' +-- external 1 2 216, (out of range): 'other' + +-- initialize +local jcr_table_main = {} +local jcr_cjk = 0; local jcr_noncjk = 1; local ucs_out = 0x110000 + +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 + if not ind or ind<0 or ind>216 then + ltjb.package_error('luatexja', + "invalid character range number (" .. ind .. ")", + {"A character range number should be in the range 1..216,", + "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 + local j=b; e=b; b=j + end + for i=math.max(0x80,b),math.min(ucs_out-1,e) do + jcr_table_main[i]=ind + end +end + +function char_to_range(c) -- return the (external) range number + if c<0 or c>0x10FFFF then + ltjb.package_error('luatexja', + 'bad character code (' .. c .. ')', + {'A character number must be between 0 and 0x10ffff.', + 'So I changed this one to zero.'}) + c=0 + elseif c<0x80 then return -1 + else + local i = jcr_table_main[c] or 0 + if i==0 then return 217 else return i end + end +end + +function get_range_setting(i) -- i: internal range number + return floor(tex.getattribute( + luatexbase.attributes['ltj@kcat'..floor(i/31)]) + /math.pow(2, i%31))%2 +end + +-- glyph_node p は和文文字か? +function is_ucs_in_japanese_char(p) + local c = p.char + if c<0x80 then return false + else + local i=jcr_table_main[c] + return (floor( + has_attr(p, luatexbase.attributes['ltj@kcat'..floor(i/31)]) + /math.pow(2, i%31))%2 ~= jcr_noncjk) + end +end + +-- EXT +function toggle_char_range(g, i) -- i: external range number + if i==0 then return + else + local kc + if i>0 then kc=0 else kc=1; i=-i end + if i>216 then i=0 end + local attr = luatexbase.attributes['ltj@kcat'..floor(i/31)] + local a = tex.getattribute(attr) + local k = math.pow(2, i%31) + tex.setattribute(g,attr,(floor(a/k/2)*2+kc)*k+a%k) + end +end + +-- EOF
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