\NeedsTeXFormat{LaTeX2e}[1994/06/01]

\ProvidesClass{tufte-handout}[2008/02/09 v1.2.2 Tufte-handout class]

%%
% a4paper option

\newif\if@tufteh@afourpaper \@tufteh@afourpaperfalse
\DeclareOption{a4paper}{\@tufteh@afourpapertrue}

% Note: should probably specify options not supported like Mittelbach's aipproc.cls

\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions

\LoadClass[11pt]{article}%

%%
% Set page layout geometry

\if@tufteh@afourpaper
  \RequirePackage[a4paper,includemp,width=170mm,marginparsep=10mm,marginparwidth=50mm]{geometry}
\else
  \RequirePackage[letterpaper,includemp,width=6.5in,marginparsep=0.375in,marginparwidth=2in]{geometry}
\fi

%%
% Separation marginpars by a line's worth of space.

\setlength\marginparpush{\baselineskip}

%%
% Font for margin items

\newcommand{\@tufteh@marginfont}{\normalfont\scriptsize\sffamily}

%%
% Modify \raggedright from latex.ltx to allow hyphenation per Donald Arseneau

\def\@tufteh@raggedright{%
  \let\\\@centercr\@rightskip\z@ plus 0.08\hsize% changed this line
  \rightskip\@rightskip
  \leftskip\z@skip}

%%
% Turn off section numbering

\setcounter{secnumdepth}{-1}

%%
% Tighten up space between displays (e.g., a figure or table) and make symmetric

\setlength\abovedisplayskip{6pt plus 2pt minus 4pt}
\setlength\belowdisplayskip{6pt plus 2pt minus 4pt}

%%
% To accomodate full-width display environments

\RequirePackage{chngpage}

% Compute length used for full-width displays

\newlength{\@tufteh@overhang}
\setlength{\@tufteh@overhang}{\marginparwidth}
\addtolength{\@tufteh@overhang}{\marginparsep}

%%
% Alter \maketitle from article.cls

\renewcommand\maketitle{\par
  \global\let\and\relax
  \begingroup
    \renewcommand\thefootnote{\@fnsymbol\c@footnote}%
    \def\@makefnmark{\rlap{\@textsuperscript{\normalfont\@thefnmark}}}%
    \long\def\@makefntext##1{\parindent 1em\noindent
            \hb@xt@1.8em{%
                \hss\@textsuperscript{\normalfont\@thefnmark}}##1}%
    \newpage
    \global\@topnum\z@
    \@maketitle
    \@thanks
  \endgroup
  \global\let\thanks\relax
  \global\let\maketitle\relax
  \global\let\@maketitle\relax
  \global\let\@thanks\@empty
  \global\let\@author\@empty
  \global\let\@date\@empty
  \global\let\@title\@empty
  \global\let\title\relax
  \global\let\author\relax
  \global\let\date\relax
}
\def\@maketitle{%
  \newpage
  \let\footnote\sidenote
  {\noindent\large\bfseries \@title\par}%
  \vskip 3pt%
  {\small \@date\par}%
  \vskip 3pt%
  {\small \@author\par}
}

%%
% Abstract

\renewenvironment{abstract}%
 {\begin{quotation}
   \begin{sffamily}
    \begin{small}}%
 {  \end{small}
   \end{sffamily}
  \end{quotation}}

%%
% Require paralist package for tigher lists

\RequirePackage{paralist}

% Add rightmargin to compactenum

\def\@compactenum@{%
  \expandafter\list\csname label\@enumctr\endcsname{%
    \usecounter{\@enumctr}%
    \rightmargin=2em% added this
    \parsep\plparsep
    \itemsep\plitemsep
    \topsep\pltopsep
    \partopsep\plpartopsep
    \def\makelabel##1{\hss\llap{##1}}}}

%%
% An environment for paragraph-style section

\providecommand\newthought[1]{\vspace{1.8\baselineskip plus 3pt minus 2pt}%
                           {\noindent\scshape #1}}

%%
% Transform existing \footnotes into \sidenotes
% Sidenote: ``Where God meant footnotes to go.'' ---Tufte

\RequirePackage[side,multiple,marginal]{footmisc}
\setlength{\footnotemargin}{0.8em}
\newcommand{\footnotelayout}{\@tufteh@marginfont\@tufteh@raggedright}
\let\sidenote\footnote

% Set the footnote mark (adjacent to the footnote) in the same typeface as the footenote itself.
\def\@makefnmark{\hbox{\@textsuperscript{\@tufteh@marginfont\tiny\@thefnmark}}}

% TODO Automatically determine the \footnotemargin value based on the width of the footnote mark.

%%
% Sidenote without the footnote mark

\providecommand\marginnote[1]%
  {\marginpar{\@tufteh@marginfont\raggedright #1}}

%%
% Citations should go in the margin as well

\RequirePackage{natbib}
\RequirePackage{bibentry}	% allows bibitems to be typeset outside thebibliography environment
\nobibliography*		% pre-loads the bibliography keys
\renewcommand{\cite}[1]{\sidenote{\bibentry{#1}}}
\providecommand{\doi}[1]{\textsc{doi:} #1} % pre-defining this so it may be used before the \bibliography command it issued

% TODO Rewrite \cite so that you can specify multiple bib keys at once: \cite{Author01,Author02}
% TODO Combine sequences of citations: 2,3,4,6 becomes 2-4,6

%%
% Margin figure -- if anyone can make this an environment instead -- patch welcome!

\newcommand{\marginfigure}[2]%
  [-1.2ex]%
  {\marginpar{\@tufteh@marginfont
              \def\@captype{figure}
              \vspace*{#1}
              \@tufteh@raggedright #2}}

%%
% Margin table

\newcommand{\margintable}[2]%
  [-1.2ex]%
  {\marginpar{\@tufteh@marginfont
              \def\@captype{table}
              \vspace*{#1}
              \@tufteh@raggedright #2}}

%%
% Full-width figure

\renewenvironment{figure*}[1]%
  [htbp]%
  {\@float{figure}[#1]%
   \begin{adjustwidth}{}{-\@tufteh@overhang}%
   \begin{minipage}{\linewidth}}%
  {\end{minipage}%
   \end{adjustwidth}%
   \end@float}

%%
% Full-width table

\renewenvironment{table*}[1]
  [htbp]%
  {\@float{table}[#1]%
   \begin{adjustwidth}{}{-\@tufteh@overhang}%
   \begin{minipage}{\linewidth}}%
  {\end{minipage}%
   \end{adjustwidth}%
   \end@float}

%%
% Full-page-width area

\newenvironment{fullwidth}
  {\begin{adjustwidth}{}{-\@tufteh@overhang}}%
  {\end{adjustwidth}}

%%
% Set raggedright and paragraph indentation for document

\AtBeginDocument{\@tufteh@raggedright\setlength\parindent{1em}}

\endinput