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%
% gentombow.sty
% written by Hironobu Yamashita (@aminophen)
%
% This package is part of the gentombow bundle.
% https://github.com/aminophen/gentombow
%

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{gentombow}
    [2018/03/16 v0.9e Generate crop mark 'tombow']
\def\pxgtmb@emu@pkgname{gentombow}

%% error status (shared with pxgentombow.sty)
\ifx\pxgtmb@errlevel\@undefined
  \chardef\pxgtmb@errlevel=\z@
\fi

%% supported engines
\ifx\pfmtversion\@undefined
  \@ifpackageloaded{luatexja}{}{\chardef\pxgtmb@errlevel=\@ne}
\fi
\ifnum\pxgtmb@errlevel>\z@\else
  \PackageInfo{\pxgtmb@emu@pkgname}{%
    pLaTeX, upLaTeX and LuaTeX-ja are natively\MessageBreak
    supported by `pxgentombow' package;\MessageBreak
    there is no need for this package.}
  \RequirePackageWithOptions{pxgentombow}
  \expandafter\endinput
\fi

%%%%% EMULATION BEGIN

% required for patching \@outputpage
\RequirePackage{etoolbox}

% patch \@outputpage
\begingroup
\def\pxgtmb@emu@status{0}
\let\pxgtmb@emu@outputpage\@outputpage
\patchcmd\pxgtmb@emu@outputpage % try first patch
  {\reset@font\normalsize\normalsfcodes}%
  {%
     \@@topmargin\topmargin
     \iftombow
       \@@paperwidth\paperwidth \advance\@@paperwidth 6mm\relax
       \@@paperheight\paperheight \advance\@@paperheight 16mm\relax
       \advance\@@topmargin 1in\relax \advance\@themargin 1in\relax
     \fi
   \reset@font\normalsize\normalsfcodes}
  {}{\def\pxgtmb@emu@status{1}}
\patchcmd\pxgtmb@emu@outputpage % try second patch
  {\@begindvi \vskip \topmargin}%
  {\@begindvi \@outputtombow \vskip \@@topmargin}%
  {}{\def\pxgtmb@emu@status{1}}
% commit the change only when successful; otherwise
% tombow feature is never enabled, exit right away
\if 0\pxgtmb@emu@status\relax
  \global\let\@outputpage\pxgtmb@emu@outputpage
\else
  \PackageError{\pxgtmb@emu@pkgname}{%
    Failed in patching \string\@outputpage!\MessageBreak
    Sorry, I can't proceed anymore...}\@ehc
  \expandafter\expandafter\expandafter\endinput\expandafter
\fi
\endgroup
%

% provides equivalent for plcore.ltx
\newif\iftombow \tombowfalse
\newif\iftombowdate \tombowdatetrue
\newdimen\@tombowwidth
\setlength{\@tombowwidth}{.1\p@}
\newbox\@TL\newbox\@Tl
\newbox\@TC
\newbox\@TR\newbox\@Tr
\newbox\@BL\newbox\@Bl
\newbox\@BC
\newbox\@BR\newbox\@Br
\newbox\@CL
\newbox\@CR
\font\@bannerfont=cmtt9
\newtoks\@bannertoken
\@bannertoken{}
\def\maketombowbox{% removed \yoko from all boxes
  \setbox\@TL\hbox to\z@{\hss
      \vrule width13mm height\@tombowwidth depth\z@
      \vrule height10mm width\@tombowwidth depth\z@
      \iftombowdate
        \raise4pt\hbox to\z@{\hskip5mm\@bannerfont\the\@bannertoken\hss}%
      \fi}%
  \setbox\@Tl\hbox to\z@{\hss
      \vrule width10mm height\@tombowwidth depth\z@
      \vrule height13mm width\@tombowwidth depth\z@}%
  \setbox\@TC\hbox{%
      \vrule width10mm height\@tombowwidth depth\z@
      \vrule height10mm width\@tombowwidth depth\z@
      \vrule width10mm height\@tombowwidth depth\z@}%
  \setbox\@TR\hbox to\z@{%
      \vrule height10mm width\@tombowwidth depth\z@
      \vrule width13mm height\@tombowwidth depth\z@\hss}%
  \setbox\@Tr\hbox to\z@{%
      \vrule height13mm width\@tombowwidth depth\z@
      \vrule width10mm height\@tombowwidth depth\z@\hss}%
  \setbox\@BL\hbox to\z@{\hss
      \vrule width13mm depth\@tombowwidth height\z@
      \vrule depth10mm width\@tombowwidth height\z@}%
  \setbox\@Bl\hbox to\z@{\hss
      \vrule width10mm depth\@tombowwidth height\z@
      \vrule depth13mm width\@tombowwidth height\z@}%
  \setbox\@BC\hbox{%
      \vrule width10mm depth\@tombowwidth height\z@
      \vrule depth10mm width\@tombowwidth height\z@
      \vrule width10mm depth\@tombowwidth height\z@}%
  \setbox\@BR\hbox to\z@{%
      \vrule depth10mm width\@tombowwidth height\z@
      \vrule width13mm depth\@tombowwidth height\z@\hss}%
  \setbox\@Br\hbox to\z@{%
      \vrule depth13mm width\@tombowwidth height\z@
      \vrule width10mm depth\@tombowwidth height\z@\hss}%
  \setbox\@CL\hbox to\z@{\hss
      \vrule width10mm height.5\@tombowwidth depth.5\@tombowwidth
      \vrule height10mm depth10mm width\@tombowwidth}%
  \setbox\@CR\hbox to\z@{%
      \vrule height10mm depth10mm width\@tombowwidth
      \vrule height.5\@tombowwidth depth.5\@tombowwidth width10mm\hss}%
}
\def\@outputtombow{%
  \iftombow
  \vbox to\z@{\kern-13mm\relax
    \boxmaxdepth\maxdimen
    \moveleft3mm\vbox to\@@paperheight{%
      \hbox to\@@paperwidth{\hskip3mm\relax
         \copy\@TL\hfill\copy\@TC\hfill\copy\@TR\hskip3mm}%
      \kern-10mm
      \hbox to\@@paperwidth{\copy\@Tl\hfill\copy\@Tr}%
      \vfill
      \hbox to\@@paperwidth{\copy\@CL\hfill\copy\@CR}%
      \vfill
      \hbox to\@@paperwidth{\copy\@Bl\hfill\copy\@Br}%
      \kern-10mm
      \hbox to\@@paperwidth{\hskip3mm\relax
         \copy\@BL\hfill\copy\@BC\hfill\copy\@BR\hskip3mm}%
    }\vss
  }%
  \fi
}
\newdimen\@@paperheight
\newdimen\@@paperwidth
\newdimen\@@topmargin
\newcount\hour
\newcount\minute

%%%%% EMULATION END

%% load it
\RequirePackageWithOptions{pxgentombow}

\endinput