% Heading.tex copyright 1992 Victor Eijkhout
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%% H E A D I N G S %%%%%%%%%%%%
\@GenericConstruct{Heading}

\newif\if@headed
\add@generic@default{\add@after@command{\@headedno}}
\add@Heading@default{\add@after@command{\@headedyes}}

\add@Heading@default{\def\@afterpenalty{\penalty\@M}
    \default@break@afterno}
\add@Heading@default{\has@marksyes}

\def\@DefineHeading{
    \@DefineStopCommand{\relax}
    \csarg\edef{\@name}%
       {\@gen@open % this contains: \let\CSname{\@name Title}\nxp\tmp@title
        \the\@main@options@list
        \@gen@close}
    }

\@HeadingOption{TwoLines}{\switch {\if\EqualString{#1}}
    {yes} {\add@after@command{\next@paragraph{\clubpenalty\M@
                \next@paragraph{\global\clubpenalty\default@clubpenalty}}}}
    {no}  {\add@after@command{\clubpenalty\default@clubpenalty}}
    {default} {\edef\cs@e{\nxp\add@after@command{\nxp\next@paragraph
                {\clubpenalty\@w@w{#1}\relax\nxp\next@paragraph
                            	{\global\clubpenalty\default@clubpenalty}}}}
            \cs@e}
    \endswitch}