\LuaTeX-ja inserts glues in all three categories simultaneously inside
|hpack_filter| and |pre_linebreak_filter| callbacks. The reasons of
this specification are to behave like alphabetic characters in \LuaTeX\
-(as described in the first paragraph in this subsection), and to clarify the specification
-for \LuaTeX-ja's process.
+(as described in the first paragraph in this subsection), and to clarify
+the specification for \LuaTeX-ja's process.
\subsection{Insertion of glues/kerns for Japanese typesetting: specification}
\label{ssec-jspec}
\begin{tabular}{llllllll}
\toprule
&\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
-Input &|ã\81\82ã\80\91{}ã\80\90ã\80\99\/ã\80\98| &|い』\/a| &|う）\hbox{}（| &|え］\special{}［|\\\midrule
-\pTeX &ã\81\82ã\80\91\hbox{}ã\80\90ã\80\99\hbox{}ã\80\98&い』\/a &う）\hbox{}（ &え］\hbox{}［\\
-\LuaTeX-ja &ã\81\82ã\80\91{}ã\80\90ã\80\99\/ã\80\98 &い』\/a &う）\hbox{}（ &え］\special{}［\\
+Input &|ã\81\82ã\80\91{}ã\80\90ã\80\95\/ã\80\94| &|い』\/a| &|う）\hbox{}（| &|え］\special{}［|\\\midrule
+\pTeX &ã\81\82ã\80\91\hbox{}ã\80\90ã\80\95\hbox{}ã\80\94&い』\/a &う）\hbox{}（ &え］\hbox{}［\\
+\LuaTeX-ja &ã\81\82ã\80\91{}ã\80\90ã\80\95\/ã\80\94 &い』\/a &う）\hbox{}（ &え］\special{}［\\
\bottomrule
\end{tabular}
\end{center}
\imagfm{\jstrut\kern.5\zw}%
\imagfm{\jstrut\kern.5\zw}%
\imagfm{\jstrut\inhibitglue【}%
-\imagfm{\jstrut ã\80\99\inhibitglue}%
+\imagfm{\jstrut ã\80\95\inhibitglue}%
\imagfm{\jstrut\kern.5\zw}%
\imagfm{\jstrut\kern.5\zw}%
-\imagfm{\jstrut\inhibitglueã\80\98}%
+\imagfm{\jstrut\inhibitglueã\80\94}%
\end{center}
-\caption{Detail of the output of \pTeX in the input~(1) in Table~\ref{tab-jfmglue}.}
+\caption{Detail of the output of \pTeX\ in the input~(1) in Table~\ref{tab-jfmglue}.}
\label{fig-ptexjfm}
\end{figure}
typeset Japanese characters. We look more detail by parts.
\subsection{`Engine extension'}
-The lowest part of \LuaTeX-ja corresponds the \pTeX\ extension as
+The lowest part of \LuaTeX-ja corresponds to the \pTeX\ 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
we are going to explain:
In order to make a match between Japanese fonts and alphabetic fonts,
sometimes shifting the baseline of alphabetic characters may
be needed. \pTeX\ has a dimension |\ybaselineshift|, which
- corresponds the amount of shifting down the baseline of alphabetic
+ corresponds to the amount of shifting down the baseline of alphabetic
characters. This is useful for Japanese-based documents, but
not for documents mainly in languages with alphabetic
characters.
conditions are satisfied:
\begin{itemize}
\item An alphabetic font family named $\langle\hbox{\it arg\/}\rangle$ in
- \emph{some} alphabetic encoding already defined in the document.
+ \emph{some} alphabetic encoding is already defined in the document.
\item There exists an alphabetic encoding $\langle\hbox{\it
enc\/}\rangle$ already defined in the document such that a font
definition file $\langle\hbox{\it enc\/}\rangle\langle\hbox{\it
\begin{itemize}
\item An alphabetic font family named $\langle\hbox{\it arg\/}\rangle$
in the current alphabetic encoding $\langle\hbox{\it
- enc\/}\rangle$ already defined in the document.
+ enc\/}\rangle$ is already defined in the document.
\item A font definition file $\langle\hbox{\it enc\/}\rangle\langle\hbox{\it
arg\/}\rangle$|.fd| (all lowercase) exists.
\end{itemize}
Subsection~\ref{ssec-pol}.
As in Figure~\ref{fig-jfdef}, \LuaTeX-ja uses |\jfont| for defining
-Japanese font, as \pTeX. However, because the information of the current
+Japanese fonts, as \pTeX. However, because the information of the current
Japanese font is stored into an attribute, control sequences defined by
|\jfont| (e.g.,~|\foo| and |\bar| in Figure~\ref{fig-jfdef}) is
not representing a font by the means of \TeX82. In other words, each of
Callbacks by the \emph{luaotfload} package, e.g.,~replacement of glyphs
-according to font features, are executed just after `Examination of
-Stack Level' (see Subsections \ref{ssec-over}~and~\ref{ssec-stack}). Note that calculation of
+according to OpenType font features, are performed just after `Examination of
+stack level' (see Subsections
+\ref{ssec-over}~and~\ref{ssec-stack}). Also note that calculation of
character classes for each Japanese character is done \emph{after} the
these callbacks for now.
horizontal box. Consider a list which represents the content of the box,
then we have:
\begin{itemize}
-\item A \emph{stack\_node} whose value is $x+1$ (because all materials in
- the box are included in a group |\hbox{...}|, the value is at
- least $x+1$) in the list represents an assignment related to the
- stack system in just top-level of the list, like
+\item A \emph{stack\_node} whose value is $x+1$ (because all materials
+ in the box are included in a group |\hbox{...}|, the value of
+ |\currentgrouplevel| inside the box is at least $x+1$) in the list
+ corresponds to an assignment related to the stack system in just
+ top-level of the list, like
\begin{quote}
\begin{verbatim}
\hbox{...(assignment)...}
\end{verbatim}
\end{quote}
In this case, the current stack level is incremented to $y+1$ after the assignment.
-\item A \emph{stack\_node} whose value is more than $x+1$ in the list represents
-an assignment inside another group contained in the box. For example,
+\item A \emph{stack\_node} whose value is more than $x+1$ in the list corresponds
+to an assignment inside another group contained in the box. For example,
the following input creates
a \emph{stack\_node} whose value is $x+3=(x+1)+2$:
\begin{quote}
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