# [texhax] minipage conditional

Vafa Khalighi vafa018 at gmail.com
Tue Jun 21 09:49:42 CEST 2011

The minipage environment accepts b, t, and few others as the position of the
minipage. I want \test macro return "true" if it is used inside minipage
with b position and otherwise return "false". I do not know if there is a
better way but this is what I did:

\documentclass{article}
\makeatletter
\newif\if at test
\long\def\@iiiparbox#1#2[#3]#4#5{%
\leavevmode
\@pboxswfalse
\setlength\@tempdima{#4}%
\@begin at tempboxa\vbox{\hsize\@tempdima\@parboxrestore#5\@@par}%
\ifx\relax#2\else
\setlength\@tempdimb{#2}%
\edef\@parboxto{to\the\@tempdimb}%
\fi
\if#1b\@testtrue\vbox%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% this is where
I made \if at test true
\else\if #1t\vtop
\else\ifmmode\vcenter
\else\@pboxswtrue $\vcenter \fi\fi\fi \@parboxto{\let\hss\vss\let\unhbox\unvbox \csname bm@#3\endcsname}% \if at pboxsw \m at th$\fi
\@end at tempboxa}
\def\test{\if at test true\else false\fi}
\makeatother
\begin{document}
\begin{minipage}[b]{0.5\textwidth}
\test
\end{minipage}
\end{document}

But it returns "false". Why is this? how can I fix it? Is it a better way
for doing what I want to do?

Thanks
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