Different behavior about kanjiskip and unicode-math

• Reporter: qinglee
• Owner: (None)
• Type: Bugs
• Status: Closed
• Component: (None)
• MileStone: (None)
• Priority: 5 - Medium
• Severity: 5 - Medium
• Resolution: Invalid
• File: None

Details Reply

I provide the following example to illustrate this issue.

 \documentclass{article}
 
 \usepackage{luatexja}[2018/01/21]
 \usepackage{unicode-math}[2018/01/13]
 
 \begin{document}
 
 漢漢\typeout{\ltjgetparameter{kanjiskip}}%
 {\ltjsetkanjiskip 10pt \relax 漢漢}\typeout{\ltjgetparameter{kanjiskip}}%
 漢漢
 
 \end{document}

I get the result as follow.

0.0pt plus 0.4pt minus 0.5pt
10.0pt

If I delete the unicode-math package, I get a different result. The values of kanjiskip are unified as expected.

0.0pt plus 0.4pt minus 0.5pt
0.0pt plus 0.4pt minus 0.5pt

Ticket History (3/7 Histories)

2018-01-27 19:51 Updated by: qinglee

• New Ticket "Different behavior about kanjiskip and unicode-math" created

2018-01-27 19:55 Updated by: qinglee

• Details Updated

2018-01-27 20:45 Updated by: h7k

Comment Reply

In this case, simply using \ltjsetparameter would be fine:

{\ltjsetparameter{kanjiskip=10pt}漢漢\typeout{\ltjgetparameter{kanjiskip}}}%

\ltjsetkanjiskip and \ltjsetkxanjiskip are internal macros. The call of \ltj@setpar@global is needed before using these two commands:

 {\makeatletter\ltj@setpar@global\makeatother
  \ltjsetkanjiskip 10pt \relax 漢漢}\typeout{\ltjgetparameter{kanjiskip}}%

---

\ltj@setpar@global\ltjsetkanjiskip 10pt\relax and \ltjsetparameter{kanjiskip=10pt} has same effect. The latter is more general form, but the former is faster (since the former does not need to parse a key-value list).

2018-01-27 21:17 Updated by: qinglee

Comment Reply

Thank you for your information. As you said, \ltjsetkanjiskip and \ltjsetkxanjiskip are used for performance. Since I need to set kanjiskip and xkanjiskip in \EverySelectfont. I am really sorry for my inattention.

2018-01-27 21:25 Updated by: qinglee

• Status Update from Open to Closed

2018-01-27 21:26 Updated by: qinglee

• Resolution Update from None to Invalid

2018-01-27 23:23 Updated by: qinglee

Comment Reply

There might be an oversight in the definition of \ltj@setpar@global and \ltjglobalsetparameter.

 \protected\def\ltj@setpar@global{%
   \relax\ifnum\globaldefs>0\directlua{luatexja.isglobal='global'}%
     \else\directlua{luatexja.isglobal=''}\fi
 }

Please note that 0 is followed by \directlua{luatexja.isglobal='global'} which will be fully expanded by TeX for a complete number. It means that \directlua{luatexja.isglobal='global'} is always executed. It would be better to append a space or \relax to 0 to terminate the expansion.