uplatexとdipsによるtikzのオプションremember pictureの利用

uppgfmark.tex

\documentclass{ujarticle}

\usepackage{array}
\usepackage{tikz}

\makeatletter
\def\pgfsys@markposition#1{%
  \pdfsavepos%
  \edef\pgf@temp{#1}%
  \expandafter\pgfutil@writetoaux\expandafter{%
    \expandafter\noexpand\expandafter\pgfsyspdfmark\expandafter{\pgf@temp}{\the\pdflastxpos}{\the\pdflastypos}}%
}
\def\pgfsyspdfmark#1#2#3{%
  \expandafter\gdef\csname pgf@sys@pdf@mark@pos@#1\endcsname{\pgfqpoint{#2sp}{#3sp}}%
}
\def\pgfsys@getposition#1#2{%
  \edef\pgf@marshal{\let\noexpand#2=\expandafter\noexpand\csname pgf@sys@pdf@mark@pos@#1\endcsname}%
  \pgf@marshal%
}
\def\pgf@sys@pdf@mark@pos@pgfpageorigin{\pgfpointorigin}
\makeatother

\begin{document}
\begin{tabular}{|c|c|c|}
 \hline
 a & b & c\\
 \omit & \omit\hfill\tikz[remember picture,overlay]\node (n1) {};%
  & \omit\cr
 \hline
 d & & f\\
 \omit & \omit\tikz[remember picture,overlay]\node (n2) {};%
  \tikz[remember picture,overlay]\draw (n2.center)--(n1.center);\hfill
  & \omit\cr
 \hline
 g & h & i\\
 \hline
\end{tabular}
\end{document}