%%% assignment.hcls

\newif\iflatex\latexfalse
\newif\ifhtml\htmltrue

% should be built in
\newenvironment{center}
  {\raw{<center>}}
  {\raw{</center>}}

\def\copyrightnotice{\ifauthor\par\raw{<hr>}\copyright~\year~\theauthor\par\fi}
\let\trueenddocument=\enddocument
\def\enddocument{
 \theselfstudy
 \begin{divertoutput}[toc]
  \ifsubsubsec\raw{</table></td></tr>}\fi
  \ifsubsec\raw{</table></td></tr>}\fi
 \end{divertoutput}
 \copyrightnotice\trueenddocument}

\newif\iftitle\titlefalse
\newif\ifdate\datefalse
\newif\ifauthor\authorfalse
\def\title#1{\def\thetitle{#1}\titletrue}
\def\date#1{\def\thedate{#1}\datetrue}
\def\author#1{\def\theauthor{#1}\authortrue}
\def\maketitle{%
\iftitle\raw{<h1>}\thetitle\raw{</h1>}\fi
\ifauthor
 \ifdate
  \raw{<h2>}\theauthor\\\thedate\raw{</h2>}%
 \else
  \raw{<h2>}\theauthor\raw{</h2>}%
 \fi
\else
 \ifdate\raw{<h2>}\thedate\raw{</h2>}\fi
\fi}

%%% table of contents
\newif\ifsubsec\subsecfalse
\newif\ifsubsubsec\subsubsecfalse
\newcommand{\tableofcontents}{
\raw{<table cellpadding=0 cellspacing=0>}
\rawinput{\jobname.htoc}
\raw{</table>}
\openrawfile{toc}{\jobname.htoc}}

% we \let\label=\nolabel within toc entries to avoid inserting
% labels that belong with the labeled entity, not the toc
\def\nolabel#1{}

%%% \section
\newcounter{section}
\renewcommand{\thesection}{\arabic{section}}
\newcommand{\section}[1]{
\refstepcounter{section}
\edef\templabel{\genlab}
\raw{<h3><br>}\label{\templabel}\thesection. #1\raw{</h3>}
\begin{divertoutput}[toc]
\ifsubsubsec\raw{</table></td></tr>}\fi
\subsubsecfalse
\ifsubsec\raw{</table></td></tr>}\fi
\subsecfalse
\raw{<tr><td align="right">}\textbf{\thesection.~}\raw{<td>}\textbf{\href[plain]{\templabel}{{\let\label=\nolabel #1}}}\raw{</td></tr>}
\end{divertoutput}
}

%%% \subsection
\newcounter{subsection}[section]
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}
\newcommand{\subsection}[1]{
\refstepcounter{subsection}
\edef\templabel{\genlab}
\raw{<h4><br>}\label{\templabel}\thesubsection. #1\raw{</h4>}
\begin{divertoutput}[toc]
\ifsubsubsec\raw{</table></td></tr>}\fi
\subsubsecfalse
\ifsubsec\else\raw{<tr><td></td><td><table cellpadding=0 cellspacing=0>}\fi
\subsectrue
\raw{<tr><td>}\textbf{\thesubsection.~}\raw{</td><td>}\textbf{\href[plain]{\templabel}{{\let\label=\nolabel #1}}}\raw{</td></tr>}
\end{divertoutput}
}

%%% \subsubsection
\newcounter{subsubsection}[subsection]
\renewcommand{\thesubsubsection}{\thesubsection.\arabic{subsubsection}}
\newcommand{\subsubsection}[1]{
\refstepcounter{subsubsection}
\edef\templabel{\genlab}
\raw{<h4><br>}\label{\templabel}\thesubsubsection. #1\raw{</h4>}
\begin{divertoutput}[toc]
\ifsubsubsec\else\raw{<tr><td></td><td><table cellpadding=0 cellspacing=0>}\fi
\subsubsectrue
\raw{<tr><td>}\textbf{\thesubsubsection.~}\raw{</td><td>}\textbf{\href[plain]{\templabel}{{\let\label=\nolabel #1}}}\raw{</td></tr>}
\end{divertoutput}
}

%%% figure
\newcounter{figure}
\renewcommand{\thefigure}{\arabic{figure}}
\newcommand{\caption}[1]{\\ Figure \thefigure.~#1}
\newenvironment{figure}
  {\begingroup\refstepcounter{figure}}
  {\endgroup}

%%% exercise
\newcounter{exercise}
\renewcommand{\theexercise}{\arabic{exercise}}
\def\@startexercise{\refstepcounter{exercise}
  \raw{<hr>}
  \textbf{Exercise \theexercise. }}
\newenvironment{exercise}
  {\begingroup\def\newexercise{\@startexercise}\newexercise}
  {\raw{<hr>}}
\newcounter{subexercise}[exercise]
\renewcommand{\thesubexercise}{\theexercise\alph{subexercise}}
\newcommand{\subexercise}{\par\refstepcounter{subexercise}\textbf{\thesubexercise. }}

%%% self-study
\newif\ifselfstudy\selfstudyfalse
\def\selfstudy#1#2{\selfstudytrue}
\def\theselfstudy{\ifselfstudy\realselfstudy\fi}
\def\realselfstudy{\begingroup
  \def\sstudyentry##1##2##3{\raw{<p>}\textbf{##3.} ##1 [see \hyperlink{######2}{here}]\raw{</p>}}
  \section{Questions for self study}\label{section:selfstudy}
  \input{\jobname.sst}
  \endgroup}

%%% alphalist
\newcounter{alphalist}
\def\alphalist{\begingroup\setcounter{alphalist}{0}
 \def\endalphalistitem{}%
 \renewcommand{\item}{\endalphalistitem
  \def\endalphalistiem{\raw{</td></tr>}}%
  \stepcounter{alphalist}%
  \raw{<tr valign=top><td>}\alph{alphalist}.\raw{</td><td>}}
 \raw{<table>}}
\def\endalphalist{\endalphalistitem\raw{</table>}\endgroup}

%%% define our own (compact) description environment
\def\description{\begingroup
 \renewcommand{\item}[1][]{\raw{<dt>}##1\raw{<dd>}}\raw{<dl compact>}}
\def\enddescription{\raw{</dl>}\endgroup}

%%% index
\newcommand{\see}[2]{\emph{see} #1}
\newenvironment{theindex}
  {\begingroup\newcommand{\itemindent}{\raw{<tt>&nbsp;&nbsp;&nbsp;</tt>}}
   \renewcommand{\item}{\raw{<br>}}
   \newcommand{\subitem}{\raw{<br>}\itemindent}
   \newcommand{\subsubitem}{\raw{<br>}\itemindent\itemindent}}
  {\par\endgroup}

\def\parheader#1 {\medskip\noindent{\bf #1.}~~}

%%% grammar support
\newenvironment{grammar}
  {\begingroup
    \def\orbar{&\bar&}
    \def\nobar{&&}
    \def\longis{&$\longrightarrow$&}
   \begin{tabular}{lcl}}
  {\end{tabular}\endgroup}
\def\bar{\raw{|}}
\def\kplus{\raw{<sup>+</sup>}}
\def\kstar{\raw{*}}
\def\ang#1{\raw{&lt;}#1\raw{&gt;}}

\def\mbox#1{#1}

%%% hyperlink support
\newcommand{\hyperlink}[3][]{\raw{<a #1 href="}\url{#2}\raw{">}#3\raw{</a>}}