% \iffalse meta-comment
%
%% File: fancytm.dtx
%
% Copyright (C) 2022 Maximilian Keßler
%
% It may be distributed and/or modified under the conditions of the
% LaTeX Project Public License (LPPL), either version 1.3c of this
% license or (at your option) any later version.  The latest version
% of this license is in the file
%
%    https://www.latex-project.org/lppl.txt
%
% -----------------------------------------------------------------------
%<package>\ProvidesExplPackage{fancythm}{2022/01/17}{0.0.1}{Grouped theorems.}
%
%<*driver>
\documentclass[full,kernel]{l3doc}
\usepackage{mkessler-todo}
\begin{document}
  \DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \title{^^A
%   The \pkg{fancythm} package^^A
% }
%
% \author{^^A
%      Maximilian Keßler
% }
%
% \date{Released 2022-01-12}
%
% \maketitle
%
% \begin{documentation}
% \end{documentation}
% 
% 
% \begin{implementation}
% 
% \section{\pkg{fancythm} implementation}
%
%    \begin{macrocode}
%<*package>
%    \end{macrocode}
%
%    \begin{macrocode}
%<@@=fancythm>
%    \end{macrocode}
%
%
%  \subsection{Dependencies}
%    \begin{macrocode}
\RequirePackage{l3keys2e}
%    \end{macrocode}
%
%  \subsection{Counter management}
%
%
% Wrappers for \LaTeX2e counter manipulation
%
%
% \begin{macro}{\arabic:n, \counter_new:n, \counter_within:nn,\counter_new:nn}
%		 
%   Obvious meanings.     
%
%    \begin{macrocode}
\cs_set_eq:NN \arabic:n \arabic
\cs_set_eq:NN \counter_new:n \newcounter
\cs_set_eq:NN \counter_within:nn \counterwithin
\cs_new:Npn \counter_new:nn #1 #2
  {
    \counter_new:n { #1 }
    \counter_within:nn { #1 } { #2 }
  }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
% \begin{macro}
%   {
%     \counter_if_exist_p:n,
%     \counter_if_exist:nT,
%     \counter_if_exist:F,
%     \counter_if_exist:nTF,
%   }
%		 
%     
%
%    \begin{macrocode}
\cs_new:Npn \counter_if_exist_p:n #1 
  {
    \cs_if_exist_p:c { c@ #1 }
  }
\cs_new:Npn \counter_if_exist:nT #1
  {
    \cs_if_exist:cT { c@ #1 }
  }
\cs_new:Npn \counter_if_exist:nF #1
  {
    \cs_if_exist:cF { c@ #1 }
  }
\cs_new:Npn \counter_if_exist:nTF #1
  {
    \cs_if_exist:cTF { c@ #1 }
  }
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\counter_undefined_error:n}
%		 
%     Standard counter error message.     
%
%    \begin{macrocode}
\cs_set_eq:Nc \counter_undefined_error:n { @nocounterr }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
% \begin{macro}{\counter_ensure_exist:n}
%		 
%     
%
%    \begin{macrocode}
\cs_new:Npn \counter_ensure_exist:n #1 
  {
    \counter_if_exist:nF { #1 }
      {
        \counter_undefined_error:n { #1 }
      }
  }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
%
% \begin{macro}{\counter_the:n, \counter_set_the:nn}
%     
%
%    \begin{macrocode}
\cs_new:Npn \counter_the:n #1
  {
    \use:c { the #1 }
  }
\cs_new:Npn \counter_set_the:nn #1 #2
  {
    \counter_ensure_exist:n { #1 }
    \exp_args:Nc \renewcommand { the #1 } { #2 }
  }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
% \begin{macro}{\counter_sub:nn}
%    \begin{syntax}
%       \cs{counter_sub:nn}\marg{counter_1}\marg{counter_2}
%    \end{syntax}
%		 
%     
%
%    \begin{macrocode}
\cs_new:Npn \counter_sub:nn #1 #2
  {
    \counter_within:nn { #1 } { #2 }
    \counter_set_the:nn { #1 } 
    {
      \counter_the:n { #2 } . \arabic:n { #1 }
    }
  }
%    \end{macrocode}
% \end{macro}
% 
%
% \begin{macro}{\counter_new_sub:nn #1 #2}
%		 
%     
%
%    \begin{macrocode}
\cs_new:Npn \counter_new_sub:nn #1 #2
  {
    \counter_new:n { #1 }
    \counter_sub:nn { #1 } { #2 }
  }

%    \end{macrocode}
% \end{macro}
%
% \subsection{Counter management}
% 
% 
%
% \begin{macro}{\@@_counter_sub_if_exist:n}
%		 
%     
%
%    \begin{macrocode}
\cs_new:Npn \@@_counter_sub_if_exist:n #1
  {
    \counter_if_exist:nT { #1 }
      {
        \counter_new_sub:nn { in #1 } { #1 }
      }
  }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
% 
%
% \begin{macro}{\counter_alias:nn, \counter_alias:nx}
%    \begin{syntax}
%       \cs{counter_alias:nn}\marg{counter_1}\marg{counter_2}
%    \end{syntax}
%		 
%     
%
%    \begin{macrocode}
\cs_set_eq:Nc \counter_alias:nn { @counteralias }
\cs_generate_variant:Nn \counter_alias:nn { n x }
%    \end{macrocode}
% \end{macro}
% 
% 
% 
% 
% 
% 
%   \subsection{Initialization}
% 
% 
%
% \begin{variable}{indocument, insection, insubsection, inchapter, inpart}
%		 
%     
%
%    \begin{macrocode}
\counter_new:n { indocument }
\@@_counter_sub_if_exist:n { section }
\@@_counter_sub_if_exist:n { subsection }
\@@_counter_sub_if_exist:n { chapter }
\@@_counter_sub_if_exist:n { part }
%    \end{macrocode}
% \end{variable}
%
% \begin{variable}{toplevel, sublevel, subsublevel, subsubsublevel}
%		 
%     Note that the \texttt{toplevel} counter will be potentially redefined
%     by the given package options.
%
%    \begin{macrocode}
\counter_alias:nn   { toplevel       } { indocument  }
\counter_new_sub:nn { sublevel       } { toplevel    }
\counter_new_sub:nn { subsublevel    } { sublevel    }
\counter_new_sub:nn { subsubsublevel } { subsublevel }
%    \end{macrocode}
% \end{variable}
% 
% 
% \begin{variable}{\g_@@_style_str}
%		 
%     This will hold the style information of the package.
%
%    \begin{macrocode}
\str_new:N \g_@@_style_str
%    \end{macrocode}
% \end{variable}
% 
% \begin{variable}{\g_@@_translator_bool}
%		 
%     
%
%    \begin{macrocode}
\bool_new:N \g_@@_translator_bool
%    \end{macrocode}
% \end{variable}
% 
% 
% \begin{variable}{\g_@@_generate_defaults_bool}
%		 
%     
%
%    \begin{macrocode}
\bool_new:N \g_@@_generate_defaults_bool
%    \end{macrocode}
% \end{variable}
% 
%    \subsection{Key interface}
% 
%  Note that unfortunately, none of the keynames really containes a space.
%  \LaTeX2e strips spaces before loading a package, so introducing them here
%  would make them inaccessible.
%
%
%    \begin{macrocode}
\keys_define:nn { fancythm }
  {
    translator        .bool_set:N   = \g_@@_translator_bool        ,
    translator        .default:n    = { true }                            ,
    generate defaults .bool_set:N   = \g_@@_generate_defaults_bool ,
    generate defaults .default:n    = { true }                            ,
    number in         .choices:nn   =
      { document, section, subsection, chapter, part }
      {
        \counter_alias:nx { toplevel } { in \tl_use:N \l_keys_choice_tl }
      }                                                                   ,
    number in         .default:n    = { document }                        ,
    style             .choices:nn   =
      { fancy, plain, classic }
      { 
        \str_set:Nn \g_@@_style_str { \tl_use:N \l_keys_choice_tl }
      }                                                                   ,
    style             .default:n    = { fancy }                           ,
  }
%    \end{macrocode}
% 
% 
%  Process the given keys:
%
%
%    \begin{macrocode}
\ProcessKeysOptions{ fancythm }
%    \end{macrocode}
% 
% 
%    \begin{macrocode}
%


%    \end{macrocode}
% 
% 
% 
%    \begin{macrocode}
%</package>
%    \end{macrocode}
%
%   \end{implementation}
% 
% 
% 
% \newpage