2 -- luatexja/inputbuf.lua
4 luatexbase.provides_module({
5 name = 'luatexja.inputbuf',
8 description = 'Supressing a space by newline after Japanese characters',
10 module('luatexja.inputbuf', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
15 local utf = unicode.utf8
16 local node_new = node.new
17 local id_glyph = node.id('glyph')
18 local getcatcode = tex.getcatcode
19 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
21 --- the following function is modified from jafontspec.lua (by K. Maeda).
22 --- Instead of "%", we use U+FFFFF for suppressing spaces.
23 function add_comment(buffer)
24 local i = utf.len(buffer)
25 while (i>0) and (getcatcode(utf.byte(buffer, i))==1
26 or getcatcode(utf.byte(buffer, i))==2) do
30 local c = utf.byte(buffer, i)
32 local ct = getcatcode(c)
33 local te = tex.endlinechar
34 local ctl = (te ~= -1) and (getcatcode(te)==5) and (getcatcode(0xFFFFF)==14)
35 -- Is the catcode of endline character is 5 (end-of-line)?
36 -- Is the catcode of U+FFFFF (new comment char) is 14 (comment)?
37 if ((ct==11) or (ct==12)) and ctl then
38 local p = node_new(id_glyph)
40 if ltjc_is_ucs_in_japanese_char(p) then
41 buffer = buffer .. string.char(0xF3,0xBF,0xBF,0xBF) -- U+FFFFF
50 luatexbase.add_to_callback('process_input_buffer',
51 add_comment,'ltj.process_input_buffer')