% \iffalse meta-comment
%
% File: pdfcolparcolumns.dtx
% Version: 2019/12/29 v1.5
% Info: Color stacks for parcolumns
%
% Copyright (C)
%    2007, 2008, 2010 Heiko Oberdiek
%    2016-2019 Oberdiek Package Support Group
%    https://github.com/ho-tex/oberdiek/issues
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any later
% version. This version of this license is in
%    https://www.latex-project.org/lppl/lppl-1-3c.txt
% and the latest version of this license is in
%    https://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 Maintainers of this work are
% Heiko Oberdiek and the Oberdiek Package Support Group
% https://github.com/ho-tex/oberdiek/issues
%
% This work consists of the main source file pdfcolparcolumns.dtx
% and the derived files
%    pdfcolparcolumns.sty, pdfcolparcolumns.pdf, pdfcolparcolumns.ins,
%    pdfcolparcolumns.drv, pdfcolparcolumns-test1.tex.
%
% Distribution:
%    CTAN:macros/latex/contrib/oberdiek/pdfcolparcolumns.dtx
%    CTAN:macros/latex/contrib/oberdiek/pdfcolparcolumns.pdf
%
% Unpacking:
%    (a) If pdfcolparcolumns.ins is present:
%           tex pdfcolparcolumns.ins
%    (b) Without pdfcolparcolumns.ins:
%           tex pdfcolparcolumns.dtx
%    (c) If you insist on using LaTeX
%           latex \let\install=y\input{pdfcolparcolumns.dtx}
%        (quote the arguments according to the demands of your shell)
%
% Documentation:
%    (a) If pdfcolparcolumns.drv is present:
%           latex pdfcolparcolumns.drv
%    (b) Without pdfcolparcolumns.drv:
%           latex pdfcolparcolumns.dtx; ...
%    The class ltxdoc loads the configuration file ltxdoc.cfg
%    if available. Here you can specify further options, e.g.
%    use A4 as paper format:
%       \PassOptionsToClass{a4paper}{article}
%
%    Programm calls to get the documentation (example):
%       pdflatex pdfcolparcolumns.dtx
%       makeindex -s gind.ist pdfcolparcolumns.idx
%       pdflatex pdfcolparcolumns.dtx
%       makeindex -s gind.ist pdfcolparcolumns.idx
%       pdflatex pdfcolparcolumns.dtx
%
% Installation:
%    TDS:tex/latex/oberdiek/pdfcolparcolumns.sty
%    TDS:doc/latex/oberdiek/pdfcolparcolumns.pdf
%    TDS:source/latex/oberdiek/pdfcolparcolumns.dtx
%
%<*ignore>
\begingroup
  \catcode123=1 %
  \catcode125=2 %
  \def\x{LaTeX2e}%
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
         \ifx\csname processbatchFile\endcsname\relax\else1\fi
         \ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: pdfcolparcolumns 2019/12/29 v1.5 Color stacks for parcolumns (HO)}
\Msg{************************************************************************}

\keepsilent
\askforoverwritefalse

\let\MetaPrefix\relax
\preamble

This is a generated file.

Project: pdfcolparcolumns
Version: 2019/12/29 v1.5

Copyright (C)
   2007, 2008, 2010 Heiko Oberdiek
   2016-2019 Oberdiek Package Support Group

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License, either
version 1.3c of this license or (at your option) any later
version. This version of this license is in
   https://www.latex-project.org/lppl/lppl-1-3c.txt
and the latest version of this license is in
   https://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 Maintainers of this work are
Heiko Oberdiek and the Oberdiek Package Support Group
https://github.com/ho-tex/oberdiek/issues


This work consists of the main source file pdfcolparcolumns.dtx
and the derived files
   pdfcolparcolumns.sty, pdfcolparcolumns.pdf, pdfcolparcolumns.ins,
   pdfcolparcolumns.drv, pdfcolparcolumns-test1.tex.

\endpreamble
\let\MetaPrefix\DoubleperCent

\generate{%
  \file{pdfcolparcolumns.ins}{\from{pdfcolparcolumns.dtx}{install}}%
  \file{pdfcolparcolumns.drv}{\from{pdfcolparcolumns.dtx}{driver}}%
  \usedir{tex/latex/oberdiek}%
  \file{pdfcolparcolumns.sty}{\from{pdfcolparcolumns.dtx}{package}}%
%  \usedir{doc/latex/oberdiek/test}%
%  \file{pdfcolparcolumns-test1.tex}{\from{pdfcolparcolumns.dtx}{test1}}%
}

\catcode32=13\relax% active space
\let =\space%
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* file into a directory searched by TeX:}
\Msg{*}
\Msg{*     pdfcolparcolumns.sty}
\Msg{*}
\Msg{* To produce the documentation run the file `pdfcolparcolumns.drv'}
\Msg{* through LaTeX.}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}

\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile{pdfcolparcolumns.drv}%
  [2019/12/29 v1.5 Color stacks for parcolumns (HO)]%
\documentclass{ltxdoc}
\usepackage{holtxdoc}[2011/11/22]
\begin{document}
  \DocInput{pdfcolparcolumns.dtx}%
\end{document}
%</driver>
% \fi
%
%
%
% \GetFileInfo{pdfcolparcolumns.drv}
%
% \title{The \xpackage{pdfcolparcolumns} package}
% \date{2019/12/29 v1.5}
% \author{Heiko Oberdiek\thanks
% {Please report any issues at \url{https://github.com/ho-tex/oberdiek/issues}}}
%
% \maketitle
%
% \begin{abstract}
% Since version 1.40 \pdfTeX\ supports several color stacks.
% This package uses them to fix color problems in
% package \xpackage{parcolumns}.
% \end{abstract}
%
% \tableofcontents
%
% \section{Usage}
%
% \begin{quote}
% |\usepackage{pdfcolparcolumns}|
% \end{quote}
% The package \xpackage{pdfcolparcolumns} loads package \xpackage{parcolums}
% \cite{parcolumns}. If color stacks are available then the
% macros of \xpackage{parcolumns} are patched to add support
% for color stacks.
%
% \subsection{Option \xoption{rulebetweencolor}}
%
% Package \xpackage{pdfcolparcolumns} also fixes the color for the
% rule between columns (if \xoption{rulebetween} is set).
% Default color is \cs{normalcolor}. But this can be changed by using
% option \xoption{rulebetweencolor}. It takes a color specification
% as value. If the value is empty, then the default (\cs{normalcolor})
% is used.
% Examples:
% \begin{quote}
%   |rulebetweencolor=blue|,\\
%   |rulebetweencolor={red}|,\\
%   |rulebetweencolor={}|, \textit{\% \cs{normalcolor} is used}\\
%   |rulebetweencolor=[rgb]{1,0,.5}| \textit{\% see below}
% \end{quote}
% If used inside the optional argument of environment \textsf{parcolumns}
% and the value contains an optional argument, then whole value
% must be put in curly braces:
%\begin{quote}
%\begin{verbatim}
%\begin{parcolumns}[
%  rulebetween,
%  rulebetweencolor={[rgb]{1,0,.5}},
%]{2}
%  ...
%\end{parcolumns}
%\end{verbatim}
%\end{quote}
% This option \xoption{rulebetweencolor} can also be set using
% \cs{setkeys}:
%\begin{quote}
%\begin{verbatim}
%\setkeys{parcolumns}{rulebetweencolor=green}
%\end{verbatim}
%\end{quote}
%
% \subsection{Future}
%
% Currently package \xpackage{parcolumns} does not seem to be
% maintained. Nevertheless if there will be a new version that
% adds support for color stacks, then this package may become
% obsolete.
%
% \StopEventually{
% }
%
% \section{Implementation}
%
% \subsection{Identification}
%
%    \begin{macrocode}
%<*package>
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{pdfcolparcolumns}%
  [2019/12/29 v1.5 Color stacks for parcolumns (HO)]%
%    \end{macrocode}
%
% \subsection{Load packages}
%
% \subsubsection{Package \xpackage{parcolumns}}
%
%    Currently package \xpackage{parcolumns} does not define options.
%    Thus it is just a precaution that the options of
%    package \xpackage{pdfcolparcolumns} are passed to
%    package \xpackage{parcolumns}.
%    \begin{macrocode}
\DeclareOption*{%
  \PassOptionsToPackage{\CurrentOption}{parcolumns}%
}
\ProcessOptions\relax
\RequirePackage{parcolumns}[2004/11/25]
%    \end{macrocode}
%
% \subsubsection{Package \xpackage{pdfcol}}
%
%    \begin{macrocode}
\RequirePackage{pdfcol}[2007/09/09]
\ifpdfcolAvailable
\else
  \PackageInfo{pdfcolparcolumns}{%
    Loading aborted, because color stacks are not available%
  }%
  \expandafter\endinput
\fi
%    \end{macrocode}
%
% \subsubsection{Package \xpackage{infwarerr}}
%
%    \begin{macrocode}
\RequirePackage{infwarerr}[2007/09/09]
%    \end{macrocode}
%
% \subsection{Color stack macros}
%
%    \begin{macro}{\pcpc@MaxStack}
%    Macro \cs{pcpc@MaxStack} holds the highest number of
%    allocated stacks.
%    \begin{macrocode}
\global\chardef\pcpc@MaxStack=\z@
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\pcpc@InitStacks}
%    Macro \cs{pcpc@InitStacks} takes the number of columns
%    as argument and ensures that there are enough color
%    stacks for all columns.
%    \begin{macrocode}
\def\pcpc@InitStacks#1{%
  \ifnum#1>\pcpc@MaxStack
    \begingroup
      \count@\pcpc@MaxStack
      \loop
        \advance\count@\@ne
        \pdfcolInitStack{pcpc@\the\count@}%
      \ifnum#1>\count@
      \repeat
      \global\chardef\pcpc@MaxStack=\count@
    \endgroup
  \fi
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\pcpc@SwitchStack}
%    \begin{macrocode}
\def\pcpc@SwitchStack#1{%
  \pdfcolSwitchStack{pcpc@\number#1}%
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\pcpc@SetCurrent}
%    \begin{macrocode}
\def\pcpc@SetCurrent#1{%
  \pdfcolSetCurrent{pcpc@\number#1}%
}
%    \end{macrocode}
%    \end{macro}
%
% \subsection{Patches}
%
%     Now the color stack macros are patched into the macros
%     of package \xpackage{parcolumns}.
%
% \subsubsection{Init stacks}
%
%    \cs{pcpc@InitStacks} should go into the definition of
%    environment |parcolumns|. \cs{pc@alloccolumns} is executed
%    there and nowhere else, thus we hook into it.
%    \begin{macrocode}
\g@addto@macro\pc@alloccolumns{%
  \pcpc@InitStacks\pc@columncount
}
%    \end{macrocode}
%
% \subsubsection{Switch stack}
%
%    \cs{pcpc@SwitchStack} should be called by marco \cs{colchunk@}.
%    However it is easier to patch \cs{pc@setcolumnwidth} that
%    is executed in \cs{colchunk@} only.
%    \begin{macrocode}
\g@addto@macro\pc@setcolumnwidth{%
  \pcpc@SwitchStack\pc@columnctr
}
%    \end{macrocode}
%
% \subsubsection{Set current stack color}
%
%    \cs{pcpc@SetCurrent} is set at the begin of each line.
%    It must be inserted into \cs{pc@placeboxes}. Unhappily
%    there is no easy way. Therefore we check and
%    redefine \cs{pc@placeboxes}.
%    \begin{macrocode}
\begingroup
  \def\x{%
    \global\let\@tempa\relax
    \count@\z@
    \hb@xt@\linewidth{%
      \vfuzz30ex %
      \vbadness\@M
      \splittopskip\z@skip
      \loop
      \ifnum\count@<\pc@columncount
        \advance\count@\@ne
        \expandafter\ifvoid\csname pc@column@\number\count@\endcsname
          \hskip\csname pc@column@width@\number\count@\endcsname
        \else
          \expandafter\setbox\expandafter\@tempboxa\expandafter
          \vsplit\csname pc@column@\number\count@\endcsname
              to \dp\strutbox
          \vbox{%
            \unvbox\@tempboxa
          }%
        \fi
        \expandafter\ifvoid\csname pc@column@\number\count@\endcsname
        \else
          \global\let\@tempa\pc@placeboxes
        \fi
        \ifnum\count@<\pc@columncount
          \strut
          \hfill
          \ifpc@rulebetween
            \vrule
            \hfill
          \fi
        \fi
      \repeat
    }%
    \@tempa
  }%
  \ifx\x\pc@placeboxes
  \else
    \@PackageWarningNoLine{pdfcolparcolumns}{%
      Command \string\pc@placeboxes\space has changed.\MessageBreak
      Supported versions of package `parcolumns':\MessageBreak
      \space\space 2004/08/05.\MessageBreak
      The redefinition of \string\pc@placeboxes\space may not%
      \MessageBreak
      behave correctly depending on the changes%
    }%
  \fi
\endgroup
%    \end{macrocode}
%    \begin{macro}{\pc@placeboxes}
%    \begin{macrocode}
\renewcommand*{\pc@placeboxes}{%
  \global\let\@tempa\relax
  \count@\z@
  \hb@xt@\linewidth{%
    \vfuzz30ex %
    \vbadness\@M
    \splittopskip\z@skip
    \loop
    \ifnum\count@<\pc@columncount
      \advance\count@\@ne
      \expandafter\ifvoid\csname pc@column@\number\count@\endcsname
        \hskip\csname pc@column@width@\number\count@\endcsname
      \else
        \expandafter\setbox\expandafter\@tempboxa\expandafter
        \vsplit\csname pc@column@\number\count@\endcsname
            to \dp\strutbox
        \vbox{%
          \pcpc@SetCurrent\count@
          \unvbox\@tempboxa
        }%
      \fi
      \expandafter\ifvoid\csname pc@column@\number\count@\endcsname
      \else
        \global\let\@tempa\pc@placeboxes
      \fi
      \ifnum\count@<\pc@columncount
        \strut
        \hfill
        \ifpc@rulebetween
          \begingroup
            \pcpc@RuleBetweenColor
            \vrule
          \endgroup
          \hfill
        \fi
      \fi
    \repeat
  }%
  \@tempa
}
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\pcpc@RuleBetweenColorDefault}
%    \begin{macrocode}
\def\pcpc@RuleBetweenColorDefault{%
  \normalcolor
}
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\pcpc@RuleBetweenColor}
%    \begin{macrocode}
\let\pcpc@RuleBetweenColor\pcpc@RuleBetweenColorDefault
%    \end{macrocode}
%    \end{macro}
%    \begin{macrocode}
\define@key{parcolumns}{rulebetweencolor}{%
  \edef\pcpc@temp{#1}%
  \ifx\pcpc@temp\@empty
    \let\pcpc@RuleBetweenColor\pcpc@RuleBetweenColorDefault
  \else
    \edef\pcpc@temp{%
      \noexpand\@ifnextchar[{%
        \def\noexpand\pcpc@RuleBetweenColor{%
          \noexpand\color\pcpc@temp
        }%
        \noexpand\pcpc@GobbleNil
      }{%
        \def\noexpand\pcpc@RuleBetweenColor{%
          \noexpand\color{\pcpc@temp}%
        }%
        \noexpand\pcpc@GobbleNil
      }%
      \pcpc@temp\noexpand\@nil
    }%
    \pcpc@temp
  \fi
}
%    \end{macrocode}
%    \begin{macro}{\pcpc@GobbleNil}
%    \begin{macrocode}
\long\def\pcpc@GobbleNil#1\@nil{}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macrocode}
%</package>
%    \end{macrocode}
%% \section{Installation}
%
% \subsection{Download}
%
% \paragraph{Package.} This package is available on
% CTAN\footnote{\CTANpkg{pdfcolparcolumns}}:
% \begin{description}
% \item[\CTAN{macros/latex/contrib/oberdiek/pdfcolparcolumns.dtx}] The source file.
% \item[\CTAN{macros/latex/contrib/oberdiek/pdfcolparcolumns.pdf}] Documentation.
% \end{description}
%
%
% \paragraph{Bundle.} All the packages of the bundle `oberdiek'
% are also available in a TDS compliant ZIP archive. There
% the packages are already unpacked and the documentation files
% are generated. The files and directories obey the TDS standard.
% \begin{description}
% \item[\CTANinstall{install/macros/latex/contrib/oberdiek.tds.zip}]
% \end{description}
% \emph{TDS} refers to the standard ``A Directory Structure
% for \TeX\ Files'' (\CTANpkg{tds}). Directories
% with \xfile{texmf} in their name are usually organized this way.
%
% \subsection{Bundle installation}
%
% \paragraph{Unpacking.} Unpack the \xfile{oberdiek.tds.zip} in the
% TDS tree (also known as \xfile{texmf} tree) of your choice.
% Example (linux):
% \begin{quote}
%   |unzip oberdiek.tds.zip -d ~/texmf|
% \end{quote}
%
% \subsection{Package installation}
%
% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
% \docstrip\ archive. The files are extracted by running the
% \xfile{.dtx} through \plainTeX:
% \begin{quote}
%   \verb|tex pdfcolparcolumns.dtx|
% \end{quote}
%
% \paragraph{TDS.} Now the different files must be moved into
% the different directories in your installation TDS tree
% (also known as \xfile{texmf} tree):
% \begin{quote}
% \def\t{^^A
% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}}
%   pdfcolparcolumns.sty & tex/latex/oberdiek/pdfcolparcolumns.sty\\
%   pdfcolparcolumns.pdf & doc/latex/oberdiek/pdfcolparcolumns.pdf\\
%   pdfcolparcolumns.dtx & source/latex/oberdiek/pdfcolparcolumns.dtx\\
% \end{tabular}^^A
% }^^A
% \sbox0{\t}^^A
% \ifdim\wd0>\linewidth
%   \begingroup
%     \advance\linewidth by\leftmargin
%     \advance\linewidth by\rightmargin
%   \edef\x{\endgroup
%     \def\noexpand\lw{\the\linewidth}^^A
%   }\x
%   \def\lwbox{^^A
%     \leavevmode
%     \hbox to \linewidth{^^A
%       \kern-\leftmargin\relax
%       \hss
%       \usebox0
%       \hss
%       \kern-\rightmargin\relax
%     }^^A
%   }^^A
%   \ifdim\wd0>\lw
%     \sbox0{\small\t}^^A
%     \ifdim\wd0>\linewidth
%       \ifdim\wd0>\lw
%         \sbox0{\footnotesize\t}^^A
%         \ifdim\wd0>\linewidth
%           \ifdim\wd0>\lw
%             \sbox0{\scriptsize\t}^^A
%             \ifdim\wd0>\linewidth
%               \ifdim\wd0>\lw
%                 \sbox0{\tiny\t}^^A
%                 \ifdim\wd0>\linewidth
%                   \lwbox
%                 \else
%                   \usebox0
%                 \fi
%               \else
%                 \lwbox
%               \fi
%             \else
%               \usebox0
%             \fi
%           \else
%             \lwbox
%           \fi
%         \else
%           \usebox0
%         \fi
%       \else
%         \lwbox
%       \fi
%     \else
%       \usebox0
%     \fi
%   \else
%     \lwbox
%   \fi
% \else
%   \usebox0
% \fi
% \end{quote}
% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
% TDS installing feature, then some files can already be in the right
% place, see the documentation of \docstrip.
%
% \subsection{Refresh file name databases}
%
% If your \TeX~distribution
% (\TeX\,Live, \mikTeX, \dots) relies on file name databases, you must refresh
% these. For example, \TeX\,Live\ users run \verb|texhash| or
% \verb|mktexlsr|.
%
% \subsection{Some details for the interested}
%
% \paragraph{Unpacking with \LaTeX.}
% The \xfile{.dtx} chooses its action depending on the format:
% \begin{description}
% \item[\plainTeX:] Run \docstrip\ and extract the files.
% \item[\LaTeX:] Generate the documentation.
% \end{description}
% If you insist on using \LaTeX\ for \docstrip\ (really,
% \docstrip\ does not need \LaTeX), then inform the autodetect routine
% about your intention:
% \begin{quote}
%   \verb|latex \let\install=y\input{pdfcolparcolumns.dtx}|
% \end{quote}
% Do not forget to quote the argument according to the demands
% of your shell.
%
% \paragraph{Generating the documentation.}
% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
% the documentation. The process can be configured by the
% configuration file \xfile{ltxdoc.cfg}. For instance, put this
% line into this file, if you want to have A4 as paper format:
% \begin{quote}
%   \verb|\PassOptionsToClass{a4paper}{article}|
% \end{quote}
% An example follows how to generate the
% documentation with pdf\LaTeX:
% \begin{quote}
%\begin{verbatim}
%pdflatex pdfcolparcolumns.dtx
%makeindex -s gind.ist pdfcolparcolumns.idx
%pdflatex pdfcolparcolumns.dtx
%makeindex -s gind.ist pdfcolparcolumns.idx
%pdflatex pdfcolparcolumns.dtx
%\end{verbatim}
% \end{quote}
%
% \begin{thebibliography}{9}
%
% \bibitem{parcolumns}
%   Jonathan Sauer: \textit{The \xpackage{parcolumns} package};
%   2004/11/25;\\
%   \CTANpkg{parcolumns}.
%
% \bibitem{pdfcol}
%   Heiko Oberdiek: \textit{The \xpackage{pdfcol} package};
%   2007/09/09;\\
%   \CTANpkg{pdfcol}.
%
% \end{thebibliography}
%
% \begin{History}
%   \begin{Version}{2007/07/26 v1.0}
%   \item
%     First version, published in the newsgroup \xnewsgroup{comp.text.tex}
%     with the name \xpackage{parcolumns-colorstacks}: ^^A no line break
%     \URL{``\link{Re: \xpackage{xcolor} glitches}''}^^A
%     {https://groups.google.com/group/comp.text.tex/msg/56bd897b11bca414}
%   \end{Version}
%   \begin{Version}{2007/09/09 v1.1}
%   \item
%     CTAN version, package name renamed to \xpackage{pdfcolparcolumns}.
%   \item
%     Uses package \xpackage{pdfcol}.
%   \item
%     Documentation added.
%   \item
%     Test file added.
%   \end{Version}
%   \begin{Version}{2008/08/11 v1.2}
%   \item
%     Code is not changed.
%   \item
%     URLs updated.
%   \end{Version}
%   \begin{Version}{2010/01/11 v1.3}
%   \item
%     Fix for rule color.
%   \item
%     New option \xoption{rulebetweencolor} for environment |parcolumns|.
%   \end{Version}
%   \begin{Version}{2016/05/16 v1.4}
%   \item
%     Documentation updates.
%   \end{Version}
%   \begin{Version}{2019/12/29 v1.5}
%   \item
%     \cs{PassOptionsToPackage} not \cs{PassoptionsToPackage}
%   \end{Version}
% \end{History}
%
% \PrintIndex
%
% \Finale
\endinput