% !TeX root = tcolorbox.tex
% include file of tcolorbox.tex (manual of the LaTeX package tcolorbox)
\clearpage
\section{Library \mylib{documentation}}\label{sec:documentation}
This library has the single purpose to support \LaTeX\ package documentations
like this one. Actually, the visual nature follows the approach from
Till Tantau's |pgf| \cite{tantau:2010c} documentation.
Typically, this library is assumed to be used in conjunction with the
class |ltxdoc| or alike.

The library is loaded by a package option or inside the preamble by:
\begin{dispListing}
  \tcbuselibrary{documentation}
\end{dispListing}
This also loads the library \mylib{listings}, see section \ref{sec:listings},
and a bunch of packages, namely
|doc|, |pifont|, |marvosym|, |hyperref|, |makeidx|, and |refcount|.

For UTF-8 support, load:
\begin{dispListing}
  \tcbuselibrary{listingsutf8,documentation}
\end{dispListing}

For |minted| \cite{rudolph:2011a} support, load:
\begin{dispListing}
  \tcbuselibrary{documentation,minted}
  \tcbset{listing engine=minted}
\end{dispListing}


\subsection{Macros of the Library}

\begin{docEnvironment}[doclang/environment content=command description]{docCommand}{\oarg{options}\marg{name}\marg{parameters}}
  Documents a \LaTeX\ macro with given \meta{name} where \meta{name} is
  written without backslash. The given \meta{options} are set with \refCom{tcbset}.
  This macro takes mandatory or optional \meta{parameters}.
  It is automatically indexed and can be referenced with
  \refCom{refCom}\marg{name}.
\begin{dispExample}
\begin{docCommand}{foomakedocSubKey}{\marg{name}\marg{key path}}
  Creates a new environment \meta{name} based on \refEnv{docKey} for the
  documentation of keys with the given \meta{key path}.
\end{docCommand}
\end{dispExample}
\begin{dispExample}
\begin{docCommand}[color definition=blue]{foomakedocSubKey*}%
    {\marg{name}\marg{key path}}
  Creates a new environment \meta{name} based on \refEnv{docKey} for the
  documentation of keys with the given \meta{key path}.
\end{docCommand}
\end{dispExample}
\end{docEnvironment}

\clearpage
{\let\xdocEnvironment\docEnvironment
\let\endxdocEnvironment\enddocEnvironment
\begin{xdocEnvironment}[doclang/environment content=environment description]{docEnvironment}{\oarg{options}\marg{name}\marg{parameters}}
  Documents a \LaTeX\ environment with given \meta{name}.
  The given \meta{options} are set with \refCom{tcbset}.
  This environment takes mandatory or optional \meta{parameters}.
  It is automatically indexed and can be referenced with
  \refCom{refEnv}\marg{name}.
\begin{dispExample}
\begin{docEnvironment}{foocolorbox}{\oarg{options}}
  This is the main environment to create an accentuated colored text box with
  rounded corners and, optionally, two parts.
\end{docEnvironment}
\end{dispExample}
\begin{dispExample}
\begin{docEnvironment}%
    [doclang/environment content=My content text]%
    {foocolorbox*}{\oarg{options}}
  This is the main environment to create an accentuated colored text box with
  rounded corners and, optionally, two parts.
\end{docEnvironment}
\end{dispExample}
\end{xdocEnvironment}}


\begin{docEnvironment}[doclang/environment content=key description]{docKey}{\oarg{key path}\marg{name}\marg{parameters}\marg{description}}
  Documents a key with given \meta{name} and an optional \meta{key path}.
  This key takes mandatory or optional \meta{parameters} as value
  with a short \meta{description}.
  It is automatically indexed and can be referenced with
  \refCom{refKey}\marg{name}.
\begin{dispExample}
\begin{docKey}[foo]{footitle}{=\meta{text}}{no default, initially empty}
  Creates a heading line with \meta{text} as content.
\end{docKey}
\end{dispExample}
\end{docEnvironment}


\begin{docCommand}{docAuxCommand}{\marg{name}}
  Documents an auxiliary or minor \LaTeX\ macro with given \meta{name}
  where \meta{name} is written without backslash.
  This macro is automatically indexed.
\begin{dispExample}
The macro \docAuxCommand{fooaux} holds some interesting data.
\end{dispExample}
\end{docCommand}

\clearpage
\begin{docCommand}{docColor}{\marg{name}}
  Documents a color with given \meta{name}. The color is automatically indexed.
\begin{dispExample}
The color \docColor{foocolor} is available.
\end{dispExample}
\end{docCommand}


\begin{docCommand}{cs}{\marg{name}}
  Macro from |ltxdoc| \cite{carlisle:2007a} to typeset a command word \meta{name}
  where the backslash is prefixed. The library overwrites the original macro.
\begin{dispExample}
This is a \cs{foocommand}.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{meta}{\marg{text}}
  Macro from |doc| \cite{mittelbach:2011a} to typeset a meta \meta{text}.
\begin{dispExample}
This is a \meta{text}.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{marg}{\marg{text}}
  Macro from |ltxdoc| \cite{carlisle:2007a} to typeset a \meta{text} with
  curly brackets as a mandatory argument. The library overwrites the original macro.
\begin{dispExample}
This is a mandatory \marg{argument}.
\end{dispExample}
\end{docCommand}


\begin{docCommand}{oarg}{\marg{text}}
  Macro from |ltxdoc| \cite{carlisle:2007a} to typeset a \meta{text} with
  square brackets as an optional argument. The library overwrites the original macro.
\begin{dispExample}
This is an optional \oarg{argument}.
\end{dispExample}
\end{docCommand}


\begin{docCommand}{brackets}{\marg{text}}
  Sets the given \meta{text} with curly brackets.
\begin{dispExample}
  Here we use \brackets{some text}.
\end{dispExample}
\end{docCommand}

\clearpage

{\let\xdispExample\dispExample
  \let\endxdispExample\enddispExample
\begin{docEnvironment}{dispExample}{}
  Creates a colored box based on a \refEnv{tcolorbox}.
  It displays the environment content as source code in the upper part
  and as compiled text in the lower part of the box.
  The appearance is controlled by \refKey{/tcb/documentation listing style}
  and the style \refKey{/tcb/docexample}. It may be
  changed by redefining this style.
{
%\tcbset{before lower app={\tcbset{docexample/.style={docexample original}}}}
%\tcbset{docexample/.style={docexample original}}%
\begin{xdispExample}
\begin{dispExample}
This is a \LaTeX\ example.
\end{dispExample}
\end{xdispExample}
}
\end{docEnvironment}}


{\let\xdispExample\dispExample
  \let\endxdispExample\enddispExample
\begin{docEnvironment}{dispExample*}{\marg{options}}
  The starred version of \refEnv{dispExample} takes \refEnv{tcolorbox} \meta{options}
  as parameter. These \meta{options} are executed after \refKey{/tcb/docexample}.
\begin{xdispExample}
\begin{dispExample*}{sidebyside}
This is a \LaTeX\ example.
\end{dispExample*}
\end{xdispExample}
\end{docEnvironment}}


\clearpage
\begin{docEnvironment}{dispListing}{}
  Creates a colored box based on a \refEnv{tcolorbox}.
  It displays the environment content as source code.
  The appearance is controlled by \refKey{/tcb/documentation listing style}
  and the style \refKey{/tcb/docexample}. It may be
  changed by redefining this style.
\begin{dispExample}
\begin{dispListing}
This is a \LaTeX\ example.
\end{dispListing}
\end{dispExample}
\end{docEnvironment}

\begin{docEnvironment}{dispListing*}{\marg{options}}
  The starred version of \refEnv{dispListing} takes \refEnv{tcolorbox} \meta{options}
  as parameter. These \meta{options} are executed after \refKey{/tcb/docexample}.
\begin{dispExample}
\begin{dispListing*}{title=My listing}
This is a \LaTeX\ example.
\end{dispListing*}
\end{dispExample}
\end{docEnvironment}


\begin{docEnvironment}{absquote}{}
  Used to typeset an abstract as quoted and small text.
\begin{dispExample}
\begin{absquote}
|tcolorbox| provides an environment for colored and framed text boxes with a
heading line. Optionally, such a box can be split in an upper and a lower part.
\end{absquote}
\end{dispExample}
\end{docEnvironment}

\clearpage
\begin{docCommand}{tcbmakedocSubKey}{\marg{name}\marg{key path}}
  Creates a new environment \meta{name} based on \refEnv{docKey} for the
  documentation of keys with the given \meta{key path} as default.
  The new environment \meta{name} takes the same para\-meters as \refEnv{docKey} itself.
\begin{dispExample}
\tcbmakedocSubKey{docFooKey}{foo}

\begin{docFooKey}{foodummy}{=\meta{nothing}}{no default, initially empty}
Some key.
\end{docFooKey}
\end{dispExample}
\end{docCommand}


\begin{docCommand}{refCom}{\marg{name}}
  References a documented \LaTeX\ macro with given \meta{name} where \meta{name} is
  written without backslash. The page reference is suppressed if it links
  to the same page.
\begin{dispExample}
We have created \refCom{foomakedocSubKey} as an example.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{refCom*}{\marg{name}}
  References a documented \LaTeX\ macro with given \meta{name} where \meta{name} is
  written without backslash. There is no page reference.
\begin{dispExample}
We have created \refCom*{foomakedocSubKey} as an example.
\end{dispExample}
\end{docCommand}


\begin{docCommand}{refEnv}{\marg{name}}
  References a documented \LaTeX\ environment with given \meta{name}.
  The page reference is suppressed if it links to the same page.
\begin{dispExample}
We have created \refEnv{foocolorbox} as an example.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{refEnv*}{\marg{name}}
  References a documented \LaTeX\ environment with given \meta{name}.
  There is no page reference.
\begin{dispExample}
We have created \refEnv*{foocolorbox} as an example.
\end{dispExample}
\end{docCommand}

\clearpage
\begin{docCommand}{refKey}{\marg{name}}
  References a documented key with given \meta{name} where \meta{name}
  is the full path name of the key.
  The page reference is suppressed if it links to the same page.
\begin{dispExample}
We have created \refKey{/foo/footitle} as an example.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{refKey*}{\marg{name}}
  References a documented key with given \meta{name} where \meta{name}
  is the full path name of the key.
  There is no page reference.
\begin{dispExample}
We have created \refKey*{/foo/footitle} as an example.
\end{dispExample}
\end{docCommand}

%
\begin{docCommand}{colDef}{\marg{text}}
Sets \meta{text} with the definition color, see \refKey{/tcb/color definition}.
\begin{dispExample}
This is my \colDef{text}.
\end{dispExample}
\end{docCommand}

\begin{docCommand}{colOpt}{\marg{text}}
  Sets \meta{text} with the option color, see \refKey{/tcb/color option}.
\begin{dispExample}
This is my \colOpt{text}.
\end{dispExample}
\end{docCommand}


\clearpage
\subsection{Option Keys of the Library}

\begin{docTcbKey}{docexample}{}{style, no value}
  Sets the style for \refEnv{dispExample} and \refEnv{dispListing}
  with the colors |ExampleBack| and |ExampleFrame|.
  To change the appearance of the examples, this style can be
  redefined.
\end{docTcbKey}

\begin{docTcbKey}{documentation listing style}{=\meta{listing style}}{no default, initially |tcbdocumentation|}
  Sets a \meta{listing style} for the |listings| package \cite{heinz:2007a}.
  It is used inside \refEnv{dispExample} and \refEnv{dispListing} to typeset
  the listings. Note that this is not identical to the key
  \refKey{/tcb/listing style} which is used for 'normal' listings.
\end{docTcbKey}

\begin{docTcbKey}{documentation minted style}{=\meta{key list}}{no default, initially unset}
  Sets a \meta{style} known to |Pygments| \cite{pygments:2013} for
  the package |minted| \cite{rudolph:2011a}, if used.
  Note that this is not identical to the key
  \refKey{/tcb/minted style} which is used for 'normal' listings.
\end{docTcbKey}


\begin{docTcbKey}{documentation minted options}{=\meta{minted style}}{no default, initially |tabsize=2,fontsize=\textbackslash small|}
  Sets the options from the package |minted| \cite{rudolph:2011a}
  which are used during typesetting of the listing, if used.
  Note that this is not identical to the key
  \refKey{/tcb/minted options} which is used for 'normal' listings.
\end{docTcbKey}

\begin{docTcbKey}{color definition}{=\meta{color}}{no default, initially |Definition|}
  Sets the highlight color used by macro and key definitions.
\end{docTcbKey}

\begin{docTcbKey}{color option}{=\meta{color}}{no default, initially |Option|}
  Sets the color used for optional arguments.
\end{docTcbKey}

\begin{docTcbKey}{color hyperlink}{=\meta{color}}{no default, initially |Hyperlink|}
  Sets the color for all hyper-links, i.\,e. all internal and external links.
\end{docTcbKey}

\begin{docTcbKey}{before example}{=\meta{macros}}{no default, initially \cs{par}\cs{smallskip}}
  Sets the \meta{macros} which are executed before \refEnv{dispExample} and \refEnv{dispListing}
  additional to \refKey{/tcb/before}.
\end{docTcbKey}

\begin{docTcbKey}{after example}{=\meta{macros}}{no default, initially empty}
  Sets the \meta{macros} which are executed after \refEnv{dispExample} and \refEnv{dispListing}
  additional to \refKey{/tcb/after}.
\end{docTcbKey}

\begin{docTcbKey}{index format}{=\meta{format}}{no default, initially |pgf|}
  Determines the basic \meta{format} of the generated index.
  Feasible values are:
  \begin{itemize}
  \item |pgf|: The index is formatted like in the |pgf| documentation.
  \item |doc|: The index assumed to be formatted by |doc|/|ltxdoc|. A usage of |makeindex|
    with |-s gind.ist| is assumed. The package |hypdoc| has to be loaded
    \emph{before} |tcolorbox|.
  \end{itemize}
\end{docTcbKey}

\begin{docTcbKey}{index actual}{=\meta{character}}{no default, initially |@|}
  Sets the character for 'actual' in automatic indexing.
\end{docTcbKey}

\begin{docTcbKey}{index quote}{=\meta{character}}{no default, initially |"|}
  Sets the character for 'quote' in automatic indexing.
\end{docTcbKey}

\begin{docTcbKey}{index level}{=\meta{character}}{no default, initially |!|}
  Sets the character for 'level' in automatic indexing.
\end{docTcbKey}

\begin{docTcbKey}{index default settings}{}{style, no value}
  Sets the |makeindex| default values for
  \refKey{/tcb/index actual},
  \refKey{/tcb/index quote}, and
  \refKey{/tcb/index level}.
\end{docTcbKey}

\enlargethispage*{20mm}
\begin{docTcbKey}{index german settings}{}{style, no value}
  Sets the |makeindex| values recommended for German language texts.
  This is identical to setting the following:
\begin{dispListing}
\tcbset{index actual={=},index quote={!},index level={>}}
\end{dispListing}
\end{docTcbKey}

\clearpage
The following keys are provided for language specific settings.
The English language is predefined.

\begin{docTcbKey}{english language}{}{style, no value}
  Sets all language specific settings to English.
\end{docTcbKey}

\begin{langTcbKey}{color}{=\meta{text}}{no default, initially |color|}
  Text used in the index for colors.
\end{langTcbKey}

\begin{langTcbKey}{colors}{=\meta{text}}{no default, initially |Colors|}
  Heading text in the index for colors.
\end{langTcbKey}

\begin{langTcbKey}{environment content}{=\meta{text}}{no default, initially |environment content|}
  Text used in \refEnv{docEnvironment}.
\end{langTcbKey}

\begin{langTcbKey}{environment}{=\meta{text}}{no default, initially |environment|}
  Text used in the index for environments.
\end{langTcbKey}

\begin{langTcbKey}{environments}{=\meta{text}}{no default, initially |Environments|}
  Heading text in the index for environments.
\end{langTcbKey}

\begin{langTcbKey}{key}{=\meta{text}}{no default, initially |key|}
  Text used in the index for keys.
\end{langTcbKey}

\begin{langTcbKey}{index}{=\meta{text}}{no default, initially |Index|}
  Heading text for the index.
\end{langTcbKey}

\begin{langTcbKey}{pageshort}{=\meta{text}}{no default, initially |P.|}
  Short text for page references.
\end{langTcbKey}


\subsection{Predefined Colors of the Library}
The following colors are predefined. They are used as default colors
in some library commands.

\def\dispColor#1{\docColor{#1}~\tikz[baseline=1mm]\path[fill=#1,draw] (0,0) rectangle (0.4,0.4);~}

\dispColor{Option},
\dispColor{Definition},
\dispColor{ExampleFrame},
\dispColor{ExampleBack},
\dispColor{Hyperlink}.


