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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/luatex/generic/luatexja/src/ltj-inputbuf.lua
Initial commit
Diffstat (limited to 'macros/luatex/generic/luatexja/src/ltj-inputbuf.lua')
-rw-r--r--macros/luatex/generic/luatexja/src/ltj-inputbuf.lua53
1 files changed, 53 insertions, 0 deletions
diff --git a/macros/luatex/generic/luatexja/src/ltj-inputbuf.lua b/macros/luatex/generic/luatexja/src/ltj-inputbuf.lua
new file mode 100644
index 0000000000..e901d43891
--- /dev/null
+++ b/macros/luatex/generic/luatexja/src/ltj-inputbuf.lua
@@ -0,0 +1,53 @@
+--
+-- luatexja/ltj-inputbuf.lua
+--
+
+luatexja.load_module('base'); local ltjb = luatexja.base
+luatexja.load_module('charrange'); local ltjc = luatexja.charrange
+
+require("unicode")
+local utflen = utf.len
+local utfbyte = utf.byte
+local utfchar = utf.char
+local node_new = node.new
+local node_free = node.free
+local id_glyph = node.id('glyph')
+local getcatcode, getcount = tex.getcatcode, tex.getcount
+local ltjc_is_japanese_char_curlist = ltjc.is_japanese_char_curlist
+
+--- the following function is modified from jafontspec.lua (by K. Maeda).
+--- Instead of "%", we use U+FFFFF for suppressing spaces.
+--DEBUG require"socket"
+local time_line = 0
+local start_time_measure, stop_time_measure
+ = ltjb.start_time_measure, ltjb.stop_time_measure
+local function add_comment(buffer)
+ start_time_measure('inputbuf')
+ local i = utflen(buffer)
+ while (i>0) and (getcatcode(utfbyte(buffer, i))==1
+ or getcatcode(utfbyte(buffer, i))==2) do
+ i=i-1
+ end
+ if i>0 then
+ local c = utfbyte(buffer, i)
+ if c>=0x80 then
+ local ct = getcatcode(c)
+ local te = tex.endlinechar
+ local ctl = (te ~= -1) and (getcatcode(te)==5) and (getcatcode(getcount('ltjlineendcomment'))==14)
+ -- Is the catcode of endline character is 5 (end-of-line)?
+ -- Is the catcode of \ltjlineendcomment (new comment char) is 14 (comment)?
+ if ((ct==11) or (ct==12)) and ctl then
+ if ltjc_is_japanese_char_curlist(c) then
+ buffer = buffer .. utfchar(getcount('ltjlineendcomment'))
+ end
+ end
+ end
+ end
+ stop_time_measure('inputbuf')
+ return buffer
+end
+
+luatexbase.add_to_callback('process_input_buffer',
+ add_comment,'ltj.process_input_buffer')
+
+--EOF