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--
-- luatexja/inputbuf.lua
--
luatexbase.provides_module({
name = 'luatexja.inputbuf',
date = '2011/04/01',
version = '0.1',
description = 'Supressing a space by newline after Japanese characters',
})
module('luatexja.inputbuf', package.seeall)
local err, warn, info, log = luatexbase.errwarinf(_NAME)
luatexja.load_module('charrange'); local ltjc = luatexja.charrange
local node_new = node.new
local id_glyph = node.id('glyph')
local getcatcode = tex.getcatcode
local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
--- the following function is modified from jafontspec.lua (by K. Maeda).
--- Instead of "%", we use U+FFFFF for suppressing spaces.
function add_comment(buffer)
local i = utf.len(buffer)
while (i>0) and (getcatcode(utf.byte(buffer, i))==1
or getcatcode(utf.byte(buffer, i))==2) do
i=i-1
end
if i>0 then
local c = utf.byte(buffer, i)
if c>0x80 then
local ct = getcatcode(c)
local te = tex.endlinechar
local ctl = (te ~= -1) and (getcatcode(te)==5) and (getcatcode(0xFFFFF)==14)
-- Is the catcode of endline character is 5 (end-of-line)?
-- Is the catcode of U+FFFFF (new comment char) is 14 (comment)?
if ((ct==11) or (ct==12)) and ctl then
local p = node_new(id_glyph)
p.char = c
if ltjc_is_ucs_in_japanese_char(p) then
buffer = buffer .. string.char(0xF3,0xBF,0xBF,0xBF) -- U+FFFFF
end
node.free(p)
end
end
end
return buffer
end
luatexbase.add_to_callback('process_input_buffer',
add_comment,'ltj.process_input_buffer')
--EOF
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