From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Mon, 2 Sep 2019 13:46:59 +0900
Subject: Initial commit

---
 macros/latex/contrib/showexpl/showexpl.dtx | 764 +++++++++++++++++++++++++++++
 1 file changed, 764 insertions(+)
 create mode 100644 macros/latex/contrib/showexpl/showexpl.dtx

(limited to 'macros/latex/contrib/showexpl/showexpl.dtx')

diff --git a/macros/latex/contrib/showexpl/showexpl.dtx b/macros/latex/contrib/showexpl/showexpl.dtx
new file mode 100644
index 0000000000..a7c3c96677
--- /dev/null
+++ b/macros/latex/contrib/showexpl/showexpl.dtx
@@ -0,0 +1,764 @@
+% \iffalse meta-comment
+%
+% Copyright (C) 2004 -- 2016 by Rolf Niepraschk <Rolf.Niepraschk@gmx.de>
+% --------------------------------------------------------------------
+%
+% This file may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.2
+% 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 1.2 or later is part of all distributions of LaTeX
+% version 1999/12/01 or later.
+%
+% \fi
+%
+% \iffalse
+%<*driver>
+\ProvidesFile{showexpl.dtx}
+%</driver>
+%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
+%<package>\ProvidesPackage{showexpl}
+%<*package>
+    [2016/12/11 v0.3o Typesetting example code (RN)]
+%</package>
+%
+%<*driver>
+\documentclass[a4paper]{ltxdoc}
+\usepackage{showexpl}
+\EnableCrossrefs
+\CodelineIndex
+\RecordChanges
+\begin{document}
+  \DocInput{showexpl.dtx}
+  \PrintChanges
+  \PrintIndex
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{887}
+%
+% \CharacterTable
+%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%   Digits        \0\1\2\3\4\5\6\7\8\9
+%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%   Dollar        \$     Percent       \%     Ampersand     \&
+%   Acute accent  \'     Left paren    \(     Right paren   \)
+%   Asterisk      \*     Plus          \+     Comma         \,
+%   Minus         \-     Point         \.     Solidus       \/
+%   Colon         \:     Semicolon     \;     Less than     \<
+%   Equals        \=     Greater than  \>     Question mark \?
+%   Commercial at \@     Left bracket  \[     Backslash     \\
+%   Right bracket \]     Circumflex    \^     Underscore    \_
+%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%   Right brace   \}     Tilde         \~}
+%
+%
+% \changes{v0.1a}{2004/11/14}{Initial version}
+%
+% \GetFileInfo{showexpl.dtx}
+%
+% \DoNotIndex{\newcommand,\renewcommand,\newenvironment,\renewenvironment}
+% \DoNotIndex{\usepackage,\documentclass,\nofiles,\bibliogaphy}
+% \DoNotIndex{\tiny,\tableofcontens}
+% \DoNotIndex{\newif,\newcounter,\linewidth,\listfiles}
+% \DoNotIndex{\providecommand,\def,\edef,\let,\gdef,\xdef,\global,\newtoks}
+% \DoNotIndex{\RequirePackage,\DeclareOption,\ProcessOptions,\ExecuteOptions}
+% \DoNotIndex{\@nameuse,\value,\input,\InputIfFileExists}
+% \DoNotIndex{\@ifdefinable,\@ifundefined,\@percentchar}
+% \DoNotIndex{\AtBeginDocument,\AtEndOfPackage,\PassOptionsToPackage}
+% \DoNotIndex{\CurrentOption,\jobname}
+% \DoNotIndex{\PackageError,\PackageWarning,\PackageWarningNoLine,\PackageInfo}
+% \DoNotIndex{\MessageBreak,\typeout}
+% \DoNotIndex{\z@,\z@skip,\p@,\@ne,\tw@,\thr@@,\@iv,\two@fourteen,\strip@pt}
+% \DoNotIndex{\the,\if,\else,\or,\fi,\ifnum,\ifdim,\ifcase,\ifodd}
+% \DoNotIndex{\advance,\multiply,\divide,\ht,\dp,\wd,\catcode}
+% \DoNotIndex{\@tfor,\do,\bgroup,\egroup,\ifx,\iftrue,\iffalse}
+% \DoNotIndex{\csname,\endcsname,\begingroup,\endgroup}
+% \DoNotIndex{\expandafter,\afterassignment,\noexpand}
+% \DoNotIndex{\@tempdima,\@tempdimb,\@tempdimc,\@tempcnta,\@tempcntb}
+% \DoNotIndex{\@halfwidth,\@wholewidth,\unitlength}
+% \DoNotIndex{\@clnwd,\@clnht,\@ovdx,\@ovdy,\@ovro,\@ovri,\@ovxx,\@ovyy}
+% \DoNotIndex{\@xarg,\@xdim,\@yarg,\@ydim,\@linelen,\@dashdim,\dimen@}
+% \DoNotIndex{\reserved@a,\relax,\protect,\long,\space}
+% \DoNotIndex{\if@tempswa,\@tempswatrue,\@tempswafalse,\@tempa}
+% \DoNotIndex{\@tempboxa,\@tempboxb,\show}
+% \DoNotIndex{\@empty,\%,\typeout,\vspace,\vskip,\the,\hbox,\par}
+% \DoNotIndex{\minipage,\endminipage,\trivlist,\endtrivlist}
+% \DoNotIndex{\parbox,\setbox,\setlength,\hfill,\item,\number}
+% \DoNotIndex{\x}
+% \DoNotIndex{\SX@put@a,\SX@put@b,\SX@put@l,\SX@put@r,\SX@put@o,\SX@put@i}
+%
+% ^^A\DoNotIndex{\usepackage,\documentclass,\tableofcontens,\printindex}
+%
+% \title{The \textsf{showexpl} package\thanks{This document
+%   corresponds to \textsf{showexpl}~\fileversion, dated \filedate.}}
+% \author{Rolf Niepraschk (\texttt{Rolf.Niepraschk@gmx.de})}
+% \date{\filedate}
+%
+% \maketitle
+%
+% \section{Introduction}
+%
+% The documentation of a \LaTeX{} package is by far more readable if there
+% are examples of the commands' and environments' usage. The best way to do
+% that is to give a comparison of the \LaTeX{} code and the formatted
+% output. \textsf{showexpl} is a package for doing that comparison, it is
+% based on the package \textsf{listings} which provides a good typesetted
+% source code with emphasised keywords and so on.
+%
+% \section{Usage}
+%
+% You can use \textsf{showexpl} like every other package by putting the
+% line
+% \begin{verbatim}
+% \usepackage{showexpl}
+% \end{verbatim}
+% \vspace{-\baselineskip}
+% in your source code. \textsf{showexpl} doesn't know any options by
+% itself, but all options for the underlying packages
+% (\textsf{listings} and \textsf{graphicx}) will be passed to the
+% respective packages.
+%
+% \textsf{showexpl} provides one command and one environment:
+% \begin{itemize}
+% \item |\LTXinputExample| and
+% \item \textsf{LTXexample}
+% \end{itemize}
+%
+% \DescribeMacro{\LTXinputExample}
+% The syntax of |\LTXinputExample| is given by
+% \begin{quote}
+% |\LTXinputExample[|\meta{key val list}|]{|\meta{file}|}|
+% \end{quote}
+%
+% \DescribeEnv{LTXexample}
+% The syntax of the environment \textsf{LTXexample} is given by
+% \begin{quote}
+% |\begin{LTXexample}[|\meta{key val list}|]|\ldots|\end{LTXexample}|
+% \end{quote}
+%
+% The set of options represented by \meta{key val list} is the same for
+% both the command and the environment, the options are described in the
+% following:
+% \begin{description}
+%   \item[attachfile] Boolean valued key, default value: false. If set to
+%   true the sourcecode will be attached to the \textsf{.pdf}
+%   file---presumed that the document is processed by |pdflatex|.
+%   \item[codefile] Name of the (temporary) file that contains the code
+%   which will be formatted as source code. The default value is |\jobname.tmp|.
+%   \item[explpreset] A \meta{key val list} which serves for presetting the
+%   properties of the formatting of the source code, for values see the
+%   documentation of the \textsf{listings} package. The default value is
+%
+%   \item[graphic] Name of a (graphic) file. This file---if present---will
+%   be included and displayed instead of the formatted code. The default value is empty.
+%   \item[hsep] Defines the horizontal distance between the source code and the
+%   formatted text.
+%   \item[justification] Defines the justification of the formatted text:
+%   reasonable values are |\raggedleft|, |\raggedright|, |\centering|. The
+%   default value is |\raggedright|.
+%   \item[overhang] A \textit{dimen}-value that defines the amount by which
+%   the formatted text and the source code can overlap the print space. The
+%   default value is 0\,pt.
+%   \item[pos:] Defines the relative position of the formatted text
+%   relating to the source code. Allowed values are |t|, |b|, |l|, |r|,
+%   |o|, and |i| for top, bottom, left, right, outer, and inner. The last
+%   values give sense only for two-sided printing, where there are outer
+%   and inner margins of a page. The default value is |l|.
+%   \item[preset] Any \TeX\ code executed before the sample code but
+%   not visible in the listings area.
+%   \item[rangeaccept] Boolean valued key, default value is false. If set
+%   to  true, one can define ranges of lines that will be excerpted from
+%   the source code.
+%   \item[rframe] Defines the form of the frame around the formatted
+%   text. With a non-empty value (e.\,g. ``single'') a simple frame
+%   will be drawn. In the future more kinds of frames will be supported.
+%   The default value is empty (no frame).
+%   \item[varwidth] Boolean valued key, default value is false. If set to
+%   true, the formatted text is set with its ``natural'' width instead of a
+%   fixed width as given by the value of the option |width|.
+%   \item[vsep] Defines the vertical distance between the source code and the
+%   formatted text.
+%   \item[wide] Boolean valued key, default value is false. If set to
+%   true, the source code and the formatted text overlap the print space
+%   and the margin area.
+%   \item[width] A \meta{dimen} value that defines the width of the
+%   formatted text. The default value depends of the relative positions of
+%   the source code and the formatted text.
+%   \item[scaled] Without a value the formatted text will be scaled to fit
+%   the given width of the result area. With a number as value the formatted
+%   text will be scaled by this number.
+% \end{description}
+% In addition to these options the kind of the result box (default: |\fbox|)
+% can be changed. For example:
+% \begin{verbatim}
+%   \renewcommand\ResultBox{\fcolorbox{green}{lightgray}}
+%   \setlength\ResultBoxSep{5mm}%  default: \fboxsep
+%   \setlength\ResultBoxRule{2mm}% default: \fboxrule
+% \end{verbatim}
+%
+% \StopEventually{}
+%
+% \section{Implementation}
+% \changes{v0.1e}{2004/11/24}{Loading of |showexpl.cfg| added (RN).}
+%    \begin{macrocode}
+\DeclareOption{final}{%
+  \PassOptionsToPackage{\CurrentOption}{graphicx}%
+  \PassOptionsToPackage{\CurrentOption}{listings}%
+}%
+\DeclareOption{draft}{%
+  \PassOptionsToPackage{\CurrentOption}{graphicx}%
+  \PassOptionsToPackage{\CurrentOption}{listings}%
+}%
+%    \end{macrocode}
+% \changes{v0.3h}{2007/02/03}{New Option `attachfiles' (RN).}
+%    \begin{macrocode}
+\DeclareOption{attachfiles}{%
+  \AtBeginDocument{\IfFileExists{attachfile.sty}%
+    {\RequirePackage{attachfile}}{\def\SX@attachfile{}}}
+}%
+\DeclareOption*{\PassOptionsToPackage{\CurrentOption}{listings}}
+\ProcessOptions\relax
+\RequirePackage{listings,calc,ifthen,graphicx,varwidth}
+%    \end{macrocode}
+% We must aktivate code from package \textsf{listings} for writing files.
+%    \begin{macrocode}
+\lst@RequireAspects{writefile}
+%    \end{macrocode}
+% \begin{macro}{\SX@defaultWD}
+% Parameter |#2| is a length or a number. Parameter |#1| is a
+% macro. After a call of \cmd{\SX@defaultWD} this macro contains the value
+% of the length or the value of the number multiplied by \cmd{\linewidth}.
+%    \begin{macrocode}
+\newcommand*\SX@defaultWD[2]{%
+  \afterassignment\SX@def@WD\dimen@#2\linewidth\relax{#1}}
+\newcommand*\SX@def@WD{}
+\def\SX@def@WD#1\relax#2{\edef#2{\the\dimen@}}
+%    \end{macrocode}
+% \end{macro}
+% Additional keys.
+% \changes{v0.1a}{2004/11/14}{``hpos'' and ``vpos'' added,
+% ``pos'' removed (RN).}
+% \changes{v0.1f}{2004/12/06}{``lstpreset'' added. (RN).}
+% \changes{v0.1h}{2005/06/03}{``codefile'' added. (RN).}
+%    \begin{macrocode}
+\lst@Key{pos}\relax{\def\SX@pos{#1}}
+\lst@Key{width}\relax{\def\SX@width{#1}}
+\lst@Key{hsep}\relax{\@tempdima=#1\relax\edef\SX@hsep{\the\@tempdima}}
+\lst@Key{vsep}\relax{\@tempdima=#1\relax\edef\SX@vsep{\the\@tempdima}}
+\lst@Key{overhang}\relax{\def\SX@overhang{#1}}
+\lst@Key{wide}f[t]{\lstKV@SetIf{#1}\if@SX@wide}
+\lst@Key{rframe}\relax{\def\SX@rframe{#1}}
+\lst@Key{preset}\relax{\def\SX@preset{#1}}
+\newcommand*\SX@scaled{}
+\lst@Key{scaled}{?}[!]{\def\SX@scaled{#1}}
+%    \end{macrocode}
+% \changes{v0.1h}{2005/06/03}{``lstpreset'' renamed to ``explpreset''
+% (RN).}
+% \changes{v0.3l}{2014/01/19}{Option ``scaled'' and \cmd{\SX@scaled}
+% added (RN).}
+%    \begin{macrocode}
+\lst@Key{explpreset}\relax{\def\SX@explpreset{#1}}
+\lst@Key{codefile}\relax{\def\SX@codefile{#1}}
+\newif\if@SX@rangeaccept \@SX@rangeacceptfalse
+\newif\if@SX@varwidth \@SX@varwidthfalse
+\newif\if@SX@wide \@SX@widefalse
+\newif\if@SX@attachfile \@SX@attachfilefalse
+%    \end{macrocode}
+% \changes{v0.1j}{2005/06/12}{``rangeaccept'' added (RN).}
+% \changes{v0.1k}{2005/06/13}{Some bug corrections (RN).}
+%    \begin{macrocode}
+\lst@Key{rangeaccept}f[t]{\lstKV@SetIf{#1}\if@SX@rangeaccept}
+%    \end{macrocode}
+% \changes{v0.2a}{2005/07/16}{``varwidth'' and ``justification'' added (RN).}
+% \changes{v0.1l}{2005/06/19}{``graphic'' added (RN).}
+% \changes{v0.3a}{2005/08/20}{``attachfile'' added (RN).}
+% \changes{v0.3n}{2016/11/20}{Define \cmd{\ResultBox} etc.}
+%    \begin{macrocode}
+\lst@Key{varwidth}f[t]{\lstKV@SetIf{#1}\if@SX@varwidth}
+\lst@Key{justification}\relax{\def\SX@justification{#1}}
+\lst@Key{attachfile}f[t]{\lstKV@SetIf{#1}\if@SX@attachfile}
+\newcommand*\SX@graphicname{}%
+\newcommand*\SX@graphicparam{}%
+\lst@Key{graphic}{}[]{%
+  \lstKV@OptArg[width=\linewidth]{#1}{%
+    \edef\SX@graphicparam{##1}\edef\SX@graphicname{##2}%
+  }%
+}%
+\newbox\SX@ResBox
+\newcommand\ResultBox{} \let\ResultBox=\fbox
+\newdimen\ResultBoxSep  \ResultBoxSep=\fboxsep
+\newdimen\ResultBoxRule \ResultBoxRule=\fboxrule
+\newcommand*\SX@pos{}
+\newcommand*\SX@width{}
+\newcommand*\SX@hsep{}
+\newcommand*\SX@vsep{}
+\newcommand*\SX@overhang{}
+\newcommand*\SX@rframe{}
+\newcommand\SX@preset{}
+\newcommand*\SX@explpreset{}
+%    \end{macrocode}
+% \changes{v0.3g}{2006/09/05}{Missing \cmd{\newcommand} for
+%   \cmd{\SX@@explpreset} added (RN).}
+%    \begin{macrocode}
+\newcommand*\SX@@explpreset{}
+\newcommand*\SX@codefile{}\edef\SX@codefile{\jobname.tmp}
+\newcommand*\SX@justification{\raggedright}
+%    \end{macrocode}
+% \begin{macro}{\SX@@preset}
+% Contains some redefinitions of \LaTeX\ macros and environments to do
+% nothing. \cmd{\SX@@preset} will be called just before
+% typesetting the result of the example code. More can be added with
+% the user key ``|preset=...|''.
+% \changes{v0.3e}{2006/04/05}{More redefinitions added (RN).}
+%    \begin{macrocode}
+\newcommand*\SX@@preset{%
+  \renewcommand\documentclass[2][]{\SX@eat@version}%
+  \renewcommand\usepackage[2][]{\SX@eat@version}%
+  \renewenvironment{document}{}{}%
+  \renewenvironment{figure}[1][]{\def\@captype{figure}}{}%
+  \renewenvironment{table}[1][]{\def\@captype{table}}{}%
+  \renewcommand\cite[1][]{}%
+  \let\tableofcontens\relax \let\listoffigures\relax
+  \let\listoftables\relax \let\printindex\relax
+  \let\listfiles\relax \let\nofiles\relax
+  \let\index\@gobble \let\label\@gobble
+  \let\bibliography\@gobble
+  \let\pagestyle\@gobble \let\thispagestyle\@gobble
+  %%\let\immediate\relax \let\write\@gobbletwo
+  %%\let\closeout\@gobble \let\@@input\@gobble
+  \renewcommand\marginpar[2][]{}%
+  \renewcommand\footnote[2][]{}%
+  \let\@footnotetext\@gobble
+  %%\abovedisplayskip=\z@
+  %%\abovedisplayshortskip=\z@
+}
+\newcommand*\SX@eat@version[1][]{}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\isSX@odd}
+%  Parameter |#1| is executed on odd pages, parameter |#2| on
+%  even pages.
+%    \begin{macrocode}
+\newif\ifSX@wasodd
+\if@twoside
+  \newcommand*{\isSX@odd}[2]{%
+    \ifthenelse{\isodd{\pageref{\SX@IDENT}}}%
+      {\SX@wasoddtrue #1}{\SX@wasoddfalse #2}}
+\else
+  \newcommand*{\isSX@odd}[2]{#1}\SX@wasoddtrue
+\fi
+%    \end{macrocode}
+%  The call of \cmd{\isSX@odd} sets also \cmd{\ifSX@wasodd} to true or
+%  false. If it's clear that no page break occurs, \cmd{\ifSX@wasodd}
+%  can be used.
+%    \begin{macrocode}
+\newcounter{ltxexample}
+\newcommand*{\SX@IDENT}{SX@\number\value{ltxexample}}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\SX@attachfile}
+% \changes{v0.3a}{2005/08/20}{Attach file functionality (with pdf\TeX)
+%   added (RN).}
+%    \begin{macrocode}
+\newcommand*\SX@attachfile{%
+  \if@SX@attachfile
+    \attachfile[mimetype=text/plain,subject={example \theltxexample}]%
+      {\SX@codefile}{}%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\SX@put@t/b/l/r/o/i}
+% Six macros for positioning |#2| (result) and |#3| (code). The result
+% can be
+% \underline{a}bove, \underline{b}elow, \underline{l}eft or
+% \underline{r}ight of the code area or on the \underline{o}uter or
+% \underline{i}nner side. Parameter |#1| is the width of the result.
+% \changes{v0.1b}{2004/11/18}{Positioning the captions more independend
+%   of the result and code area (RN).}
+% \changes{v0.1c}{2004/11/19}{Commands \cmd{\SX@KillAboveCaptionskip} and
+%   \cmd{\SX@KillBelowCaptionskip} added (RN).}
+% \changes{v0.1k}{2005/06/13}{Change [a]bove to [t]op (RN).}
+%    \begin{macrocode}
+\newcommand*\SX@put@t[3]{%
+  \SX@ResultArea{\linewidth}{#2}\endgraf\pagebreak[2]%
+  \setlength\@tempdima{\SX@vsep}\vskip\@tempdima
+  \SX@CodeArea{\linewidth}{#3}%
+}
+\newcommand*\SX@put@b[3]{%
+  \SX@CodeArea{\linewidth}{#3}\endgraf\pagebreak[2]%
+  \setlength\@tempdima{\SX@vsep}\vskip\@tempdima
+  \SX@ResultArea{\linewidth}{#2}%
+}
+\newcommand*\SX@put@l[3]{%
+  \setlength\@tempdimc{\linewidth-#1-\SX@hsep}%
+  \SX@ResultArea{#1}{#2}\hfill\SX@CodeArea{\@tempdimc}{#3}%
+}
+\newcommand*\SX@put@r[3]{%
+  \setlength\@tempdimc{\linewidth-#1-\SX@hsep}%
+  \SX@CodeArea{\@tempdimc}{#3}\hfill\SX@ResultArea{#1}{#2}%
+}
+\newcommand*\SX@put@o[3]{%
+  \@nameuse{SX@put@\ifSX@wasodd r\else l\fi}{#1}{#2}{#3}%
+}
+\newcommand*\SX@put@i[3]{%
+  \@nameuse{SX@put@\ifSX@wasodd l\else r\fi}{#1}{#2}{#3}%
+}
+\newcommand\SX@ResultArea[2]{%
+  \SX@justification\setlength\@tempdima{#1}%
+  %\minipage\@tempdima#2\endminipage
+  \parbox\@tempdima{#2}%
+}
+\newcommand\SX@CodeArea[2]{%
+  \setlength\@tempdima{#1}%
+  \sbox\@tempboxa{\parbox\@tempdima{#2}}%
+  \@tempdima=\dp\@tempboxa\usebox\@tempboxa
+  \rlap{\raisebox{-\@tempdima}[0pt][0pt]{\SX@attachfile}}%
+}
+\newcommand*\SX@KillAboveCaptionskip{%
+  \ifx\lst@caption\@empty\else
+    \lst@IfSubstring t\lst@captionpos
+      {\vskip-\abovecaptionskip}{}%
+  \fi
+}
+\newcommand*\SX@KillBelowCaptionskip{%
+  \ifx\lst@caption\@empty\else
+    \lst@IfSubstring b\lst@captionpos
+      {\vskip-\belowcaptionskip}{}%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \changes{v0.1h}{2005/06/03}{Renamed from ``example'' to ``LTXexample' (RN).}
+% \changes{v0.3n}{2016/11/20}{Prevent utf8 encoding errors}
+% \begin{environment}{LTXexample}
+%    \begin{macrocode}
+\lstnewenvironment{LTXexample}[1][]{%
+  \@temptokena{#1}%
+  \begingroup
+%    \end{macrocode}
+% For "codefile=..."/"graphic=..." if \cmd{\theltxexample} or
+% \cmd{\thelstlisting} is part of the filename.
+%    \begin{macrocode}
+  \advance\c@ltxexample\@ne \advance\c@lstlisting\@ne
+  \expandafter\lstset\expandafter{\SX@explpreset,#1}%
+  \edef\x{\endgroup
+    \def\noexpand\SX@codefile{\SX@codefile}%
+    \def\noexpand\SX@graphicname{\SX@graphicname}%
+    \def\noexpand\SX@graphicparam{\SX@graphicparam}}%
+  \x
+  \xdef\SX@@explpreset{\the\@temptokena,codefile=\SX@codefile,%
+    graphic={[\SX@graphicparam]{\SX@graphicname}}}%
+  \setbox\@tempboxa=\hbox\bgroup
+  \lst@BeginWriteFile{\SX@codefile}%
+}
+{%
+  \lst@EndWriteFile\egroup
+  \SX@put@code@result
+}
+%    \end{macrocode}
+% \end{environment}
+% \changes{v0.1i}{2005/06/07}{Better caption positioning and
+%   correct distance between the parts (RN).}
+% \changes{v0.1m}{2005/06/25}{Problem related to \cmd{\label}/\cmd{\ref}
+%   solved (RN).}
+% \changes{v0.2a}{2005/07/16}{``varwidth'' package used (RN).}
+% \changes{v0.2b}{2005/07/30}{Check if \cmd{\SX@put@}\texttt{?}
+%   is defined (RN).}
+% \begin{macro}{\SX@put@code@result}
+%    \begin{macrocode}
+\newcommand*\SX@put@code@result{%
+  \begingroup
+    \expandafter\lstset\expandafter{\SX@explpreset}%
+    \let\lst@float=\relax\let\SX@float=\relax
+%    \end{macrocode}
+% Without the following call \cmd{\lst@beginfloat} is undefined.
+%    \begin{macrocode}
+    \expandafter\lstset\expandafter{\SX@@explpreset}%
+    \ifx\lst@float\relax\else
+%    \end{macrocode}
+% \cmd{\lst@float} must be \cmd{\relax} because the whole ``example''
+% should float but not the listings part in addition.
+%    \begin{macrocode}
+      \let\SX@float=\lst@float\let\lst@float=\relax
+      \g@addto@macro\SX@@explpreset{,float=false}%
+      \edef\@tempa{\noexpand\lst@beginfloat{lstlisting}[\SX@float]}%
+      \expandafter\@tempa
+    \fi
+    \ifx\lst@caption\@empty
+      \lstset{nolol=true}%
+    \fi
+    \if@SX@wide\def\SX@overhang{\marginparwidth+\marginparsep}\fi
+    \trivlist\item\relax
+      \stepcounter{ltxexample}\label{\SX@IDENT}%
+%    \end{macrocode}
+% Make \cmd{\SX@width} a real dimension if the unit is missing.
+%    \begin{macrocode}
+      \SX@defaultWD\SX@width{\SX@width}%
+%    \end{macrocode}
+% Set the default width if necessary.
+%    \begin{macrocode}
+      \ifdim\SX@width<\z@
+        \@tempswatrue
+        \def\@tempa{t}%
+        \ifx\@tempa\SX@pos\@tempswafalse\fi
+        \def\@tempa{b}%
+        \ifx\@tempa\SX@pos\@tempswafalse\fi
+        \setlength\@tempdima{\linewidth+\SX@overhang}%
+        \if@tempswa\@tempdima=.5\@tempdima\fi%
+        \edef\SX@width{\the\@tempdima}%
+      \fi
+%    \end{macrocode}
+% Correct \cmd{\SX@width} if a frame is requested.
+% \changes{v0.3n}{2016/11/20}{Use \cmd{\ResultBox}}
+%    \begin{macrocode}
+      \ifx\SX@rframe\@empty
+        \long\def\SX@frame##1{##1}%
+      \else
+        \let\SX@frame\ResultBox
+        \setlength\@tempdima{\SX@width-2\ResultBoxSep-2\ResultBoxRule}%
+        \edef\SX@width{\the\@tempdima}%
+      \fi
+      \isSX@odd{\def\@tempa{l}}{\def\@tempa{r}}%
+      \makebox[\linewidth][\@tempa]{%
+        \parbox{\linewidth+\SX@overhang}{%
+%    \end{macrocode}
+% \cmd{\SX@codefile} (|\jobname.tmp|) is not nessesary for the filelist.
+% \changes{v0.3m}{2016/08/05}{Wrong assignement for \cmd{\lst@belowskip} (RN).}
+%    \begin{macrocode}
+          \let\@addtofilelist\@gobble
+          \let\lst@ifdisplaystyle=\iftrue
+          \SX@KillAboveCaptionskip\lst@MakeCaption{t}%
+%    \end{macrocode}
+% Use the ``natural'' width of the result code if ``varwidth'' is
+% true.
+% \changes{v0.3k}{2013/03/21}{Setting \cmd{\lst@MakeCaption} to \cmd{\@gobble}
+%    again (prevent multiply defined labels; label key)}.
+%    \begin{macrocode}
+          \let\SX@MakeCaption\lst@MakeCaption
+          \let\lst@MakeCaption\@gobble{}
+%    \end{macrocode}
+% \changes{v0.3j}{2012/09/22}{Setting \cmd{\lst@MakeCaption} to
+%    was a bad idea for hyperlinks. Group added to
+%   varwidth environment. (Suggestions by Ulrike Fischer.).}
+%    \begin{macrocode}
+          \setbox\SX@ResBox\hbox{%
+            \fboxsep=\ResultBoxSep
+            \fboxrule=\ResultBoxRule
+            \SX@frame{%
+              \@nameuse{\if@SX@varwidth varwidth\else minipage\fi}%
+                  \SX@width\relax
+                \begingroup
+                  \SX@resultInput
+                \endgroup
+              \@nameuse{end\if@SX@varwidth varwidth\else minipage\fi}}}%
+          \edef\SX@width{\the\wd\SX@ResBox}%
+          \@ifundefined{SX@put@\SX@pos}%
+            {\@latex@error{Parameter `\SX@pos' undefined}\@ehd}%
+          {\@nameuse{SX@put@\SX@pos}%
+            {\SX@width}{\box\SX@ResBox}{\SX@codeInput}}%
+          \let\lst@MakeCaption\SX@MakeCaption
+          \lst@MakeCaption{b}\SX@KillBelowCaptionskip
+        }%
+      }%
+    \endtrivlist
+    \ifx\SX@float\relax\else\expandafter\lst@endfloat\fi
+    \gdef\SX@@explpreset{}%
+  \endgroup
+}
+%    \end{macrocode}
+% \end{macro}
+% \changes{v0.3g}{2006/09/05}{\cmd{\SX@ProcessResult} is now working
+% correctly
+% using \cmd{\readline} and \cmd{\scantokens}. Thanks to Ulrich Diez
+% for help (RN).}
+%    \begin{macrocode}
+\newcommand\SX@SkipToFirst{%
+  \ifeof\@inputcheck\else
+    \ifnum \lst@lineno=\lst@firstline\else
+      \readline\@inputcheck to\SX@tempa
+      \typeout{IGNORE (\the\lst@lineno)}%
+      \global\advance\lst@lineno\@ne
+      \SX@SkipToFirst
+    \fi
+  \fi
+}
+\newcommand\SX@ProcessResult{%
+  \ifeof\@inputcheck
+    \let\SX@tempb\relax
+  \else
+    \let\SX@tempb\SX@ProcessResult
+    \ifnum \lst@lineno>\lst@lastline\relax
+      \ifx\lst@linerange\@empty
+        \let\SX@tempb\relax
+      \else
+        \lst@GetLineInterval
+        \SX@SkipToFirst
+      \fi
+    \else
+      \readline\@inputcheck to\SX@tempa
+      \typeout{READ (\the\lst@lineno)}%
+      \expandafter\g@addto@macro
+        \expandafter\SX@lines\expandafter{\SX@tempa^^J}%
+      \global\advance\lst@lineno\@ne
+    \fi
+  \fi
+  \SX@tempb
+}
+%    \end{macrocode}
+% \begin{macro}{\SX@input}
+% \changes{v0.1j}{2005/06/12}{For ranges of lines (RN).}
+%    \begin{macrocode}
+\newcommand\SX@input[1]{%
+  \begingroup
+    \IfFileExists{#1}{}%
+    {%
+      \filename@parse{#1}%
+      \ifx\filename@ext\relax \def\filename@ext{tex}\fi
+      \@latexerr{File
+        `\filename@area\filename@base.\filename@ext' not found.^^J^^J}\@ehd%
+    }%
+    \openin\@inputcheck#1
+    \lsthk@PreSet\let\lst@linerange\@empty\global\lst@lineno\@ne
+    \expandafter\lstset\expandafter{\SX@@explpreset}%
+    \ifx\lst@linerange\@empty
+      \edef\lst@linerange{{\lst@firstline}-{\lst@lastline},}%
+    \fi
+    \lst@GetLineInterval
+    \SX@Info
+    \newlinechar=`\^^J\relax
+    \SX@SkipToFirst\let\SX@lines\@empty
+    \SX@ProcessResult
+    \closein\@inputcheck
+    \scantokens\expandafter{\SX@lines}%
+  \endgroup
+}
+%    \end{macrocode}
+% \end{macro}
+%    \begin{macrocode}
+\newcommand*\SX@Info{%
+  \typeout{--------------------------------}%
+  \typeout{pos=\SX@pos}%
+  \typeout{width=\SX@width}%
+  \typeout{hsep=\SX@hsep}%
+  \typeout{vsep=\SX@vsep}%
+  \typeout{overhang=\SX@overhang}%
+  \typeout{rframe=\SX@rframe}%
+  \typeout{codefile=\SX@codefile}%
+  \@ifundefined{lst@firstline}{}%
+    {\typeout{\string\lst@firstline=\lst@firstline}}%
+  \@ifundefined{lst@lastline}{}%
+    {\typeout{\string\lst@lastline=\lst@lastline}}%
+  \@ifundefined{lst@linerange}{}%
+    {\typeout{\string\lst@linerange=\lst@linerange}}%
+  \typeout{\string\if@SX@wide=\if@SX@wide TRUE\else FALSE\fi}%
+  \typeout{\string\if@SX@rangeaccept=\if@SX@rangeaccept TRUE\else FALSE\fi}%
+  \typeout{\string\if@SX@varwidth=\if@SX@varwidth TRUE\else FALSE\fi}%
+  \typeout{graphicfile=\SX@graphicname, graphicparameter=[\SX@graphicparam]}%
+  \typeout{--------------------------------}%
+}
+\providecommand*\MakePercentIgnore{\catcode`\%9\relax}
+\providecommand*\MakePercentComment{\catcode`\%14\relax}
+%    \end{macrocode}
+% \begin{macro}{\SX@resultInput}
+% \changes{v0.3b}{2005/10/15}{Input of result code now inside a group;
+% \cmd{\makeatother} added (RN).}
+% \changes{v0.3c}{2005/10/15}{Wrong catcode for newline char corrected (RN).}
+% \changes{v0.3d}{2005/12/06}{Missing \cs{par} added (RN).}
+% \changes{v0.3l}{2014/01/19}{Code for ``scaled'' option (RN).}
+%    \begin{macrocode}
+\newcommand*\SX@resultInput{%
+  \ifx\SX@graphicname\@empty
+    \begingroup
+      \MakePercentComment\makeatother\catcode`\^^M=5\relax
+      \SX@@preset\SX@preset
+      \if@SX@rangeaccept
+       \let\SX@tempa=\SX@input
+      \else
+       \let\SX@tempa=\input
+      \fi
+      \if\SX@scaled ?%
+        \let\SX@tempb=\@firstofone
+      \else
+        \if\SX@scaled !%
+          \def\SX@tempb##1{\resizebox{\SX@width}{!}{##1}}%
+        \else
+          \def\SX@tempb##1{\scalebox{\SX@scaled}{##1}}%
+        \fi
+      \fi
+      \SX@tempb{\SX@tempa{\SX@codefile}}\par
+    \endgroup
+  \else
+    \expandafter\includegraphics\expandafter[\SX@graphicparam]%
+      {\SX@graphicname}%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\SX@codeInput}
+%    \begin{macrocode}
+\newcommand*\SX@codeInput{%
+%    \end{macrocode}
+% Without a caption entry the command \cmd{\lstinputlisting} adds the
+% filename to the ``list of listings'' (lol). This should be avoided.
+% \changes{v0.1d}{2004/11/20}{\cmd{\lstset}|{nolol}| and
+%   \cmd{\lstset}|{float=false}| added (RN).}
+% \changes{v0.1h}{2005/06/03}{\cmd{\lstset}|{float=false}| removed (RN).}
+%    \begin{macrocode}
+  \begingroup
+%    \end{macrocode}
+% The default parameters for all examples.
+%    \begin{macrocode}
+  \expandafter\lstset\expandafter{\SX@explpreset}%
+%    \end{macrocode}
+% If "numbers=none" then margin dimensions should be zero.
+%    \begin{macrocode}
+    \expandafter\lstset\expandafter{\SX@@explpreset}%
+    \ifx\lst@PlaceNumber\@empty
+      \g@addto@macro\SX@@explpreset{,xleftmargin=0pt,xrightmargin=0pt}%
+    \fi
+    \SX@Info
+    \expandafter\lstinputlisting\expandafter[\SX@@explpreset,nolol=true,%
+      caption={},belowskip=\z@,aboveskip=\z@]{\SX@codefile}%
+  \endgroup
+}%
+%    \end{macrocode}
+% \end{macro}
+% \changes{v0.1h}{2005/06/03}{New macro \cmd{\LTXinputExample} (RN).}
+%    \begin{macrocode}
+\newcommand*\LTXinputExample[2][]{%
+  \g@addto@macro\SX@@explpreset{#1,codefile=#2}%
+  \SX@put@code@result}%
+%    \end{macrocode}
+% All the default values.
+%    \begin{macrocode}
+\lstset{explpreset={numbers=left,numberstyle=\tiny,numbersep=.3em,
+%    \end{macrocode}
+% Negative width means defaults.
+%    \begin{macrocode}
+  xleftmargin=1em,columns=flexible,language=[LaTeX]TEX},pos=l,width=-99pt,
+  overhang=0pt,hsep=\columnsep,vsep=\bigskipamount,rframe=single}
+%    \end{macrocode}
+% \changes{v0.3k}{2013/03/21}{Definition for ``hyperref''
+%   (suggested by Heiko Oberdiek)}.
+%    \begin{macrocode}
+\AtBeginDocument{%
+  \def\theHlstnumber{\thelstlisting.\arabic{lstnumber}.\lst@neglisting}%
+}
+%    \end{macrocode}
+% \changes{v0.1g}{2004/12/10}{Loading of |showexpl.cfg| now at end of
+%   package (RN).}
+% Changing the defaults possible in |showexpl.cfg|.
+%    \begin{macrocode}
+\InputIfFileExists{showexpl.cfg}{}{}
+%    \end{macrocode}
+%
+% \Finale
+\endinput
-- 
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