\ProvidesPackage{hcar}

\newif\ifhcarfinal
\hcarfinalfalse
\DeclareOption{final}{\hcarfinaltrue}
\ProcessOptions

\RequirePackage{keyval}
\RequirePackage{color}
\RequirePackage{array}

\ifhcarfinal
  \RequirePackage[T1]{fontenc}
  \RequirePackage{lmodern}
  \RequirePackage{tabularx}
  \RequirePackage{booktabs}
  \RequirePackage{framed}
  \RequirePackage[obeyspaces,T1]{url}
  \RequirePackage
    [bookmarks=true,colorlinks=true,
     urlcolor=urlcolor,
     linkcolor=linkcolor,
     breaklinks=true,
     pdftitle={Haskell Communities and Activities Report}]%
    {hyperref}
\else
  \RequirePackage[obeyspaces]{url}
\fi
\urlstyle{sf}

\definecolor{urlcolor}{rgb}{0.1,0.3,0}
\definecolor{linkcolor}{rgb}{0.3,0,0}
\definecolor{shadecolor}{rgb}{0.9,0.95,1}%{0.98,1.0,0.95}
\definecolor{framecolor}{gray}{0.9}
\definecolor{oldgray}{gray}{0.7}

\newcommand{\Contact}{\subsubsection*{Contact}}
\newcommand{\FurtherReading}{\subsubsection*{Further reading}}
\newcommand{\FuturePlans}{\subsubsection*{Future plans}}
\newcommand{\Separate}{\smallskip\noindent}
\newcommand{\FinalNote}{\smallskip\noindent}

\newcommand{\urlpart}{\begingroup\urlstyle{sf}\Url}
\newcommand{\email}[1]{\href{mailto:\EMailRepl{#1}{ at }}{$\langle$\urlpart{#1}$\rangle$}}
\newcommand{\cref}[1]{($\rightarrow\,$\ref{#1})}

\ifhcarfinal
  \let\hcarshaded=\shaded
  \let\endhcarshaded=\endshaded
\else
  \newsavebox{\shadedbox}
  \newlength{\shadedboxwidth}
  \def\hcarshaded
    {\begingroup
     \setlength{\shadedboxwidth}{\linewidth}%
     \addtolength{\shadedboxwidth}{-2\fboxsep}%
     \begin{lrbox}{\shadedbox}%
     \begin{minipage}{\shadedboxwidth}\ignorespaces}
  \def\endhcarshaded
    {\end{minipage}%
     \end{lrbox}%
     \noindent
     \colorbox{shadecolor}{\usebox{\shadedbox}}%
     \endgroup}
\fi

\ifhcarfinal
  \newenvironment{hcartabularx}
    {\tabularx{\linewidth}{l>{\raggedleft}X}}
    {\endtabularx}
\else
  \newenvironment{hcartabularx}
    {\begin{tabular}{@{}m{.3\linewidth}@{}>{\raggedleft}p{.7\linewidth}@{}}}
    {\end{tabular}}
\fi

\ifhcarfinal
  \let\hcartoprule=\toprule
  \let\hcarbottomrule=\bottomrule
\else
  \let\hcartoprule=\hline
  \let\hcarbottomrule=\hline
\fi

\define@key{hcarentry}{chapter}[]{\let\level\chapter}
\define@key{hcarentry}{section}[]{\let\level\section}
\define@key{hcarentry}{subsection}[]{\let\level\subsection}
\define@key{hcarentry}{subsubsection}[]{\let\level\subsubsection}
\define@key{hcarentry}{level}{\let\level=#1}
%\define@key{hcarentry}{label}{\def\entrylabel{\label{#1}}}
\define@key{hcarentry}{new}[]%
  {\let\startnew=\hcarshaded\let\stopnew=\endhcarshaded
   \def\startupdated{\let\orig@addv\addvspace\let\addvspace\@gobble}%
   \def\stopupdated{\let\addvspace\orig@addv}}
\define@key{hcarentry}{old}[]{\def\normalcolor{\color{oldgray}}\color{oldgray}}%
\define@key{hcarentry}{updated}[]%
  {\def\startupdated
    {\leavevmode\let\orig@addv\addvspace\let\addvspace\@gobble\hcarshaded}%
   \def\stopupdated{\endhcarshaded\let\addvspace\orig@addv}}

\def\@makeheadererror{\PackageError{hcar}{hcarentry without header}{}}

\newenvironment{hcarentry}[2][]%
{\let\level\subsection
 \let\startupdated=\empty\let\stopupdated=\empty
 \let\startnew=\empty\let\stopnew=\empty
%\let\entrylabel=\empty
 \global\let\@makeheaderwarning\@makeheadererror
 \setkeys{hcarentry}{#1}%
 \startnew\startupdated
 \level{#2}%
 % test:
 \global\let\@currentlabel\@currentlabel
%\stopupdated
 \let\report@\empty
 \let\groupleaders@\empty
 \let\members@\empty
 \let\contributors@\empty
 \let\participants@\empty
 \let\developers@\empty
 \let\maintainer@\empty
 \let\status@\empty
 \let\release@\empty
 \let\portability@\empty
 \let\entry@\empty}%
{\stopnew\@makeheaderwarning}%

\renewcommand{\labelitemi}{$\circ$}
\settowidth{\leftmargini}{\labelitemi}
\addtolength{\leftmargini}{\labelsep}

\newcommand*\MakeKey[2]%
  {\expandafter\def\csname #1\endcsname##1%
     {\expandafter\def\csname #1@\endcsname{\Key@{#2}{##1}}\ignorespaces}}
\MakeKey{report}{Report by:}
\MakeKey{status}{Status:}
\MakeKey{groupleaders}{Group leaders:}
\MakeKey{members}{Members:}
\MakeKey{contributors}{Contributors:}
\MakeKey{participants}{Participants:}
\MakeKey{developers}{Developers:}
\MakeKey{maintainer}{Maintainer:}
\MakeKey{release}{Current release:}
\MakeKey{portability}{Portability:}
\MakeKey{entry}{Entry:}

\newcommand\Key@[2]{#1 & #2\tabularnewline}

\newcommand\makeheader
{\smallskip
 \begingroup
 \sffamily
 \small
 \noindent
 \let\ohrule\hrule
 \def\hrule{\color{framecolor}\ohrule}%
 \begin{hcartabularx}
 \hline
 \report@
 \groupleaders@
 \members@
 \participants@
 \developers@
 \contributors@
 \maintainer@
 \status@
 \release@
 \portability@
 \hcarbottomrule
 \end{hcartabularx}
 \endgroup
 \stopupdated
 \global\let\@makeheaderwarning\empty
 \@afterindentfalse
 \@xsect\smallskipamount}

% columns/linebreaks, interchanged
\newcommand\NCi{&\let\NX\NCii}%
\newcommand\NCii{&\let\NX\NL}%
\newcommand\NL{\\\let\NX\NCi}%
\let\NX\NCi
\newcommand\hcareditor[1]{&#1 (ed.)&\\}
\newcommand\hcarauthor[1]{#1\NX}%
\newcommand\hcareditors[1]{\multicolumn{3}{c}{#1 (eds.)}\\[2ex]}