\definecolor{grayx}{gray}{0.85}
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-\title{Development of the \LuaTeX-ja package}
+\title{Development of \LuaTeX-ja package}
\author{Hironori Kitagawa {\normalsize 北川 弘典}}
-\address{The \LuaTeX-ja project team}
+\address{\LuaTeX-ja project team}
\email{h\_kitagawa2001@yahoo.co.jp}
\keywords{\TeX, p\TeX, \LuaTeX, \LuaTeX-ja, Japanese}
\abstract{%
-The \LuaTeX-ja package is a macro package for typesetting Japanese
+\LuaTeX-ja package is a macro package for typesetting Japanese
documents under \LuaTeX. This packages has more flexibility of
typesetting than p\TeX, and corrected some unwanted features of p\TeX.
In this paper, we describe specifications, the current status and some
\LuaTeX-ja package is started initially by the author and Kazuki Maeda, because of
these situations.
-\subsection{Development Policy of \LuaTeX-ja}
+\subsection{Development policy of \LuaTeX-ja}
\label{ssec-pol}
-The first aim of the \LuaTeX-ja project is to implement features (from the
+The first aim of \LuaTeX-ja project is to implement features (from the
'primitive' level) of p\TeX\ as macros under \LuaTeX, so \LuaTeX-ja is
much affected by p\TeX. However, as development proceeds, some
technical/conceptual difficulties are arisen. Hence we changed the aim
\end{itemize}
-\subsection{Overview of the Processes}
+\subsection{Overview of the processes}
\label{ssec-over}
-We describe an outline of the \LuaTeX-ja's process in order.
+We describe an outline of \LuaTeX-ja's process in order.
\begin{itemize}
\item In the |process_input_buffer| callback: treatment of breaking
lines after a Japanese character (in Subsection~\ref{ssec-line}).
above), so we omit it from this paper.
\end{itemize}
-\subsection{Contents of this Paper}
+\subsection{Contents of this paper}
Here we describe the contents of the rest of this paper briefly. In
Section~2, we describe major differences between p\TeX\ and \LuaTeX-ja.
The next section, Section~3, is concentrated on a problem `how we
distinguish between Japanese characters and alphabetic characters'. In
-Section~4, we show rest of features of the \LuaTeX-ja package, and
+Section~4, we show rest of features of \LuaTeX-ja package, and
current status of the package. Finally, in Section~5, we describe some
internal routines of \LuaTeX-ja.
-\subsection*{About the Project}
+\subsection*{About the project}
This \LuaTeX-ja project is hosted by SourceForge.jp. The official wiki
is located on
\url{http://sourceforge.jp/projects/luatex-ja/wiki/FrontPage}. There is
overview of p\TeX, please see Okumura~\cite{ptexjp}.
-\subsection{Names of Control Sequences}
+\subsection{Names of control sequences}
\label{ssec-csname} Because p\TeX\ is an engine modification of Knuth's
original \TeX82 engine, some primitives added by it take a form that is
very difficult to be simulated by a macro. For example, an additional
a string.
\end{itemize}
-\subsection{Line-break after a Japanese Character}
+\subsection{Line-break after a Japanese character}
\label{ssec-line}
Japanese texts can break lines almost everywhere, in contrast with
Japanese character.}\label{fig-linebreak}
\end{figure}
-\subsection{Separation between `real' fonts and Metrics}
+\subsection{Separation between `real' fonts and metrics}
\label{ssec-sepmet}
Traditionally, most Japanese fonts used in typesetting are not
\label{fig-jfdef}
\end{figure}
-\subsection{Insertion of Kerns and/or Glues for Japanese Typesetting: the Timing}
+\subsection{Insertion of glues/kerns for Japanese typesetting: timing}
\label{ssec-jglue}
As described in \cite{luatexref}, \LuaTeX's kerning and ligaturing
(as described in the first paragraph), and to clarify the specification
for \LuaTeX-ja's process.
-\subsection{Insertion of Kerns and/or Glues for Japanese Typesetting: the Spec}
+\subsection{Insertion of glues/kerns for Japanese typesetting: specification}
\begin{table}
\caption{Examples of differences between p\TeX\ and \LuaTeX-ja,}
\label{tab-jfmglue}
\emph{xkanjiskip} that specified in a metric. If the value of
\emph{xkanjiskip} on user side (this is the
\textsf{xkanjiskip} parameter in |\ltjsetparameter|) is
- |\maxdimen|, then the \LuaTeX-ja use the specification from
+ |\maxdimen|, then \LuaTeX-ja use the specification from
the current used metric as the actual value of
\emph{xkanjiskip}.
This description also applies for \emph{kanjiskip}.
\end{description}
-\section{Distinction of Characters}
+\section{Distinction of characters}
Since \LuaTeX\ can handle Unicode characters natively, it is a major
problem that how we distinguish Japanese characters and alphabetic
characters. For example, the multiplication sign (U+00D7) exists both in
character is treated as an alphabetic char, because this symbol is often
used in the sense of `negative' in Japan.
-\subsection{Character Ranges}
+\subsection{Character ranges}
Before we describe the approach taken is \LuaTeX-ja, we review the
approach taken by up\TeX. up\TeX\ extends the |\kcatcode| primitive in
p\TeX, to use this primitive for setting how a character is treated
the argument is more than or equal to 128) and |\ltjalchar| always
yields an alphabetic character, regardless of the argument.
-\subsection{Default Setting of Ranges}
+\subsection{Default setting of ranges}
Patches for plain \TeX\ and \LaTeXe of \LuaTeX-ja predefines 8~character
ranges, as shown in Table~\ref{tab-chrrng}. Almost of these ranges are
just the union of Unicode blocks, and determined from the Adobe-Japan1-6
\end{center}
\end{table}
-\subsection{Control Sequences Producing Unicode Characters}
+\subsection{Control sequences producing Unicode characters}
\label{ssec-unichar}
The \emph{fontspec} package\footnote{Preciously
We would like to extend treatments described in this section to 8-bit
font encodings, but we leave it to further development too.
-\section{Current Status of Development}
+\section{Current status of development}
At the moment, \LuaTeX-ja can be used under plain \TeX, and under
\LaTeXe. Generally speaking, one only has to read |luatexja.sty|, by
|\input| command or |\usepackage| (in~\LaTeXe), if you merely want to
typeset Japanese characters. We look more detail by parts.
-\subsection{`Engine Extension'}
+\subsection{`Engine extension'}
The lowest part of \LuaTeX-ja corresponds the p\TeX\ extension as
\emph{an engine extension of \TeX}. We, the project menbers, think that
this part is almost done. There is one more feature of \LuaTeX-ja which
-\subsection{Classes for Japanese Documents}
+\subsection{Classes for Japanese documents}
To produce `high-quality' Japanese documents, we need not only that
Japanese characters are correctly placed, but also class files for
Japanese documents. In p\TeX, there are two major families of classes:
better to stay as an example of porting of class files for \pTeX\ to
\LuaTeX-ja.
-\subsection{Patches for Packages}
+\subsection{Patches for packages}
Apart from patches for the \LaTeXe~kernel and classes for Japanese
documents, we need to make patches for several packages. At the present,
we considered the following packages, and made patches or porting for
\section{Implementation}
-\subsection{Handling of Japanese Fonts}
+\subsection{Handling of Japanese fonts}
In p\TeX, there are three slots for maintaining current fonts, namely
|\font| for alphabetic fonts, |\jfont| for Japanese font (in horizontal
direction) and |\tfont| for Japanese font (in vertical direction). With
character classes for each Japanese character is done \emph{after} the
these callbacks for now.
-\subsection{Stack Management}
+\subsection{Stack management}
\label{ssec-stack}
As we noted in Subsection~\ref{ssec-csname}, parameters that the values
$y+1$, if and only if there is a \emph{stack\_node} whose value is
$x+1$. Otherwise, the stack level is just $y$.
-\subsection{Adjustment of the Position of Japanese Characters}
+\subsection{Adjustment of the position of Japanese characters}
\label{ssec-width}
The size of a glyph specified in a metric and that of a real font
The author would like to thank Ken Nakano and Hideaki Togashi for their
development of ASCII p\TeX. The author is very grateful to Haruhiko
Okumura for his leadership in the Japanese \TeX\ community. The author
-is also very grateful to members of the \LuaTeX-ja project team for their
+is also very grateful to members of \LuaTeX-ja project team for their
valuable cooperation in development.
%%% The style of the bibiliogrphy is `amsplain'.
\url{http://www.luatex.org/svn/trunk/manual/luatexref-t.pdf} (snapshot of SVN trunk)
\bibitem{man}
-The \LuaTeX-ja project team, \emph{The \LuaTeX-ja package}.
+\LuaTeX-ja project team, \emph{The \LuaTeX-ja package}.
Not completed for now. Available at |doc/man-en.pdf| (in English) or
|doc/man-ja.pdf| (in Japanese)
in the Git repository.
OSDN Git Service
