% Sample use:
%
%   \begin{boxfigure}{label}{Caption Text}
%     ... body of figure ...
%   \end{boxfigure}
% 
%   Figure~\ref{label} shows ...
%
% To override the default font size (\small) and or make any other
% settings, redefine \boxfigurebegincmd after loading this file, e.g.:
%
%   \usepackage{boxfigure}
%   \renewcommand{\boxfigurebegincmd}{...}

\newcommand{\boxfigurebegincmd}{\small}

\newenvironment{pagewideframe}
  {%
   \hbox\bgroup
     \newdimen{\pagewideframewidth}%
     \setlength{\pagewideframewidth}{\hsize}%
     \addtolength{\pagewideframewidth}{-2\fboxsep}%
     \addtolength{\pagewideframewidth}{-2\fboxrule}%
     \setbox0=\hbox\bgroup
       \begin{minipage}[t]{\pagewideframewidth}%
          \setlength{\parindent}{0pt}%
          \setlength{\parskip}{4pt plus 2pt minus 1pt}%
          \ignorespaces
  }{%
          % Without the following \hrule, if there are not any
          % paragraph lines (e.g., it is a single displayed equation),
          % then the minipage vbox will have the width of the widest
          % thing which may cause the boxed figure to look funny.  The
          % \hrule must be at the end rather than the beginning of the
          % minipage because otherwise extra \parskip glue will be
          % inserted before the first real paragraph.
          \hrule width \hsize height 0pt depth 0pt%
       \end{minipage}%
     \egroup
     %\showboxdepth=9999\relax
     %\showboxbreadth=9999\relax
     %\showbox0\relax
     \fbox{\unhbox0}%
   \egroup
  }

\newenvironment*{boxfigure}[3][htbp]%
  {%
    \begin{figure*}[#1]%
      \newcommand{\boxfigurelabel}{#2}%
      \newcommand{\boxfigurecaption}{#3}%
      \begin{pagewideframe}%
        \boxfigurebegincmd
  }{%
      \end{pagewideframe}%
      \caption{\boxfigurecaption}\label{\boxfigurelabel}%
    \end{figure*}%
  }%

%\newenvironment*{boxfigure}[3][htbp]%
%  {%
%    \begin{figure*}[#1]%
%      \newcommand{\boxfigurelabel}{#2}%
%      \newcommand{\boxfigurecaption}{#3}%
%      \newdimen{\boxfigurewidth}%
%      \setlength{\boxfigurewidth}{\hsize}%
%      \advance \boxfigurewidth by -2\fboxsep
%      \advance \boxfigurewidth by -2\fboxrule
%      \setbox0=\hbox\bgroup
%        \begin{minipage}[t]{\boxfigurewidth}%
%          %\noindent
%          % Without the following \hrule, if there are not any
%          % paragraph lines in the figure (e.g., it is a single
%          % displayed equation), then the minipage vbox will have the
%          % width of the widest thing which may cause the boxed figure
%          % to look funny.
%          \hrule width \hsize height 0pt depth 0pt%
%          \parindent=0pt%
%          \ignorespaces
%          \boxfigurebegincmd
%  }{%
%        \end{minipage}%
%      \egroup
%      \fbox{\unhbox0}%
%      \caption{\boxfigurecaption}\label{\boxfigurelabel}%
%    \end{figure*}%
%  }%

\newcommand{\boxfigurefudgefactor}[1]{\ \par\vskip-#1}

\newcommand{\pagewideframehline}
  {\break
   \hbox
     {\setlength{\dimen0}{\hsize}%
      \addtolength{\dimen0}{2\fboxsep}%
      \kern-\fboxsep
      \vrule width \dimen0 height \fboxrule depth 0pt%
      \kern-\fboxsep}%
   \break}%

\let\boxfigurehline=\pagewideframehline