%% rulerbox.sty
%% Copyright 2019 Yuchang Yang < yang.yc.allium@gmail.com >
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is Yuchang Yang.
%
% This work consists of the files rulerbox.sty, rulerbox.tex and 
% the generated manual file rulerbox.pdf.
%%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{rulerbox}[2019/04/18 v1.01 package rulerbox]
\makeatletter
\def\vb@xt@{\vbox to}
\newdimen\rulerunit
         \rulerunit=1mm
\newdimen\rulerwidth
         \rulerwidth=7pt
\newdimen\rulersep
         \rulersep=3pt
\newdimen\rtickrule
         \rtickrule=.4pt
\newdimen\dim@margin
\newdimen\dim@total@height
\newdimen\dim@depth
\def\ruler@vcells#1#2{%
    \leaders\vb@xt@#1\rulerunit{%
        \kern-.5\rtickrule
        \hrule\@height\rtickrule\@width#2\rulerwidth
        \vss}%
    \vfill\kern-#1\rulerunit}
\def\ruler@hcells#1#2{%
    \leaders\hb@xt@#1\rulerunit{%
        \kern-.5\rtickrule
        \vrule\@width\rtickrule\@height#2\rulerwidth
        \hss}%
    \hfill\kern-#1\rulerunit}
\newif\ifrulertop
        \rulertoptrue
\newif\ifrulerbottom
        \rulerbottomtrue
\newif\ifrulerleft
        \rulerlefttrue
\newif\ifrulerright
        \rulerrighttrue
\newif\ifruler@t
\newif\ifruler@b
\newif\ifruler@l
\newif\ifruler@r
\newbox\box@content
\newbox\box@ruler@left
\newbox\box@ruler@right
\newbox\box@ruler@top
\newbox\box@ruler@bottom
\def\rulerbox{%
    \let\ifruler@t\ifrulertop
    \let\ifruler@b\ifrulerbottom
    \let\ifruler@l\ifrulerleft
    \let\ifruler@r\ifrulerright
    \@ifnextchar[%]
    {\ruler@box@option}{\ruler@box}}
\def\ruler@box@option[#1]{%
    \ruler@tfalse
    \ruler@bfalse
    \ruler@lfalse
    \ruler@rfalse
    \@tfor\@iterator:=#1\do{\csname ruler@\@iterator true\endcsname}%
    \ruler@box}
\long\def\ruler@box#1{%
    \leavevmode
    \setbox\box@content=\hbox{#1}%
    \dim@margin=\rulerwidth
        \advance\dim@margin\rulersep
    \dim@total@height=\ht\box@content
        \advance\dim@total@height\dp\box@content
    \dim@depth=\dp\box@content
        \ifruler@b
            \advance\dim@depth\dim@margin
        \fi
    \rulers@prepare
    \ruler@box@
}
\def\rulers@prepare{%
    \ifruler@l\setbox\box@ruler@left=\hbox{\lower\dp\box@content\hbox{%
        \ooalign{%
                      \vb@xt@\dim@total@height{\ruler@vcells{10}{1.  }}\cr
            \hidewidth\vb@xt@\dim@total@height{\ruler@vcells{ 5}{ .75}}\cr
            \hidewidth\vb@xt@\dim@total@height{\ruler@vcells{ 1}{ .5 }}\cr
        }%
    }}\fi%
    \ifruler@r\setbox\box@ruler@right=\hbox{\lower\dp\box@content\hbox{%
        \ooalign{%
            \vb@xt@\dim@total@height{\ruler@vcells{10}{1.  }}\cr
            \vb@xt@\dim@total@height{\ruler@vcells{ 5}{ .75}}\hidewidth\cr
            \vb@xt@\dim@total@height{\ruler@vcells{ 1}{ .5 }}\hidewidth\cr
        }%
    }}\fi%
    \ifruler@t\setbox\box@ruler@top=\hbox{%
        \ooalign{%
            \hb@xt@\wd\box@content{\ruler@hcells{10}{1   }}\cr
            \hb@xt@\wd\box@content{\ruler@hcells{ 5}{ .75}}\cr
            \hb@xt@\wd\box@content{\ruler@hcells{ 1}{ .5 }}\cr
        }%
    }\fi%
    \ifruler@b\setbox\box@ruler@bottom=\hbox{%
        \ooalign{%
            \vb@xt@\rulerwidth{\hb@xt@\wd\box@content{\ruler@hcells{10}{1   }}\vss}\cr
            \vb@xt@\rulerwidth{\hb@xt@\wd\box@content{\ruler@hcells{ 5}{ .75}}\vss}\cr
            \vb@xt@\rulerwidth{\hb@xt@\wd\box@content{\ruler@hcells{ 1}{ .5 }}\vss}\cr
        }%
    }\fi}
\def\ruler@box@{%
    \lower\dim@depth\hbox{%
        \ifruler@l\kern\dim@margin\fi
        \vbox{%
            \ifruler@t
                \box\box@ruler@top
                \nointerlineskip
                \kern\rulersep
            \fi
            \hbox{%
                \ifruler@l
                    \kern-\dim@margin
                        \box\box@ruler@left
                    \kern\rulersep
                \fi
                \box\box@content
                \ifruler@r
                    \kern\rulersep
                        \box\box@ruler@right
                    \kern-\dim@margin
                \fi
            }%
            \ifruler@b
                \nointerlineskip
                \kern\rulersep
                \box\box@ruler@bottom
            \fi
            \kern\z@
        }%
        \ifruler@r\kern\dim@margin\fi
    }}
\makeatother
%%
%% End of file `rulerbox.sty'