diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
---|---|---|
committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/luatex/generic/luatexja/src/ltj-charrange.lua |
Initial commit
Diffstat (limited to 'macros/luatex/generic/luatexja/src/ltj-charrange.lua')
-rw-r--r-- | macros/luatex/generic/luatexja/src/ltj-charrange.lua | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/macros/luatex/generic/luatexja/src/ltj-charrange.lua b/macros/luatex/generic/luatexja/src/ltj-charrange.lua new file mode 100644 index 0000000000..96fbd885ab --- /dev/null +++ b/macros/luatex/generic/luatexja/src/ltj-charrange.lua @@ -0,0 +1,112 @@ +-- +-- luatexja/charrange.lua +-- +luatexbase.provides_module({ + name = 'luatexja.charrange', + date = '2019/04/01', + description = 'Handling the range of Japanese characters', +}) +luatexja.charrange = {} +luatexja.load_module('base'); local ltjb = luatexja.base + +local getchar = node.direct.getchar +local has_attr = node.direct.has_attribute +local has_attr_node = node.has_attribute +local tex_getattr = tex.getattribute + +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 +for i = 0, 31*ATTR_RANGE-1 do + 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 +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 +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 + local j=b; e=b; b=j + 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 + 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 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])~= jcr_noncjk +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>=7*ATTR_RANGE then i=0 end + local attr = kcat_attr_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 |