paper.cls

\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{paper}

\LoadClass[
    10pt,
    a4paper,
    twocolumn,
    twoside
]{article}

\RequirePackage[
    includefoot,
    margin=1cm
]{geometry}

\RequirePackage{biblatex}
\setcounter{biburlnumpenalty}{1000}
\setcounter{biburlucpenalty}{1000}
\setcounter{biburllcpenalty}{3000}
\setcounter{biburlbigbreakpenalty}{1000}
\setcounter{biburlbreakpenalty}{2000}
\nocite{*}

\RequirePackage[
    hidelinks
]{hyperref}

\RequirePackage{verbatim}

\RequirePackage{float}
\floatstyle{ruled}
\newfloat{listing}{tbph}{lst}
\floatname{listing}{Listing}
\newfloat{figure}{tbph}{fig}
\floatname{figure}{Figure}
\newfloat{table}{tbph}{tbl}
\floatname{table}{Table}

\RequirePackage{titlesec}
\titleformat\section{\rmfamily\bfseries\large}{\thesection}{1em}{}
\titlespacing*\section{0pt}{4pt plus 2pt minus 2pt}{2pt plus 1pt minus 0pt}
\titleformat\subsection{\rmfamily\bfseries\large}{\thesubsection}{1em}{}
\titlespacing*\subsection{0pt}{4pt plus 2pt minus 2pt}{2pt plus 1pt minus 0pt}
\titleformat\subsubsection{\rmfamily\bfseries}{\thesubsubsection}{1em}{}
\titlespacing*\subsubsection{0pt}{4pt plus 2pt minus 2pt}{2pt plus 1pt minus 0pt}

\RequirePackage{etoolbox}
\preto{\@verbatim}{\topsep=0pt\partopsep=0pt}

\renewcommand{\arraystretch}{1.25}

\RequirePackage{nopageno}

% https://arxiv.org/pdf/2107.02270.pdf
\RequirePackage{xcolor}
\definecolor{p0}{RGB}{63,144,218} % blue
\definecolor{p1}{RGB}{255,169,14} % orange
\definecolor{p2}{RGB}{189,31,1} % red
\definecolor{p3}{RGB}{148,164,162} % gray
\definecolor{p4}{RGB}{131,45,182} % purple
\definecolor{p5}{RGB}{169,107,89} % brown
\definecolor{p6}{RGB}{231,99,0} % dark orange
\definecolor{p7}{RGB}{185,172,112} % tan
\definecolor{p8}{RGB}{113,117,129} % dark gray
\definecolor{p9}{RGB}{146,218,221} % light blue

\RequirePackage{amssymb}
\RequirePackage{amsthm}
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\theoremstyle{definition}
\newtheorem{definition}{Definition}

\RequirePackage[hang]{footmisc}
\setlength\footnotemargin{0em}

\RequirePackage{varwidth}


\def\title#1{\def\@title{#1}}
\def\author[#1]#2{\expandafter\def\csname @author#1\endcsname{#2}}
\def\email[#1]#2{\expandafter\def\csname @email#1\endcsname{#2}}
\def\homepage[#1]#2{\expandafter\def\csname @homepage#1\endcsname{#2}}
\def\abstract#1{\def\@abstract{#1}}
\def\keywords#1{\def\@keywords{#1}}
\def\doi#1{\def\@doi{#1}}
\def\arxiv#1{\def\@arxiv{#1}}
\def\uri#1{\def\@uri{#1}}


\AtBeginDocument{
    \newcounter{@n}
    \loop
        \stepcounter{@n}
        \ifcsname @author\the@n \endcsname
            \ifnum \value{@n}=1
                \edef\@authors{\@nameuse{@author\the@n}}
            \else
                \edef\@authors{\@authors, \@nameuse{@author\the@n}}
            \fi
        \fi
        \ifnum\value{@n}<4\repeat
        \let\c@@n\undefined
    \hypersetup{
        pdftitle=\@title,
        pdfauthor=\@authors,
        pdfsubject=\@abstract,
        pdfkeywords=\@keywords
    }
}

\def\@maketitle{
    \hrule
    \vspace{1em}
    {
        \sffamily
        \bfseries
        \LARGE
        \@title
        \par
    }
    \vspace{.5em}
    \newcounter{@n}
    \loop
        \stepcounter{@n}
        \begin{varwidth}[t]{\linewidth}
            {
                \ifcsname @author\the@n \endcsname
                \sffamily
                \Large
                \@nameuse{@author\the@n}
                \par
                \fi
            }
            {
                \ifcsname @email\the@n \endcsname
                \sffamily
                \small
                \href{mailto:\@nameuse{@email\the@n}}{\@nameuse{@email\the@n}}
                \par
                \fi
            }
            {
                \ifcsname @homepage\the@n \endcsname
                \sffamily
                \small
                \href{https://\@nameuse{@homepage\the@n}}{\@nameuse{@homepage\the@n}}
                \par
                \fi
            }
        \end{varwidth}
        \ifnum\value{@n}<4\repeat
        \let\c@@n\undefined
    \vspace{.5em}
    \hrule
    \vspace{.5em}
    {
        \textbf{Abstract:}
        \@abstract
        \par
    }
    {
        \textbf{Keywords:}
        \textsc{\@keywords}
        \par
    }
    {
        \ifdefined\@doi
        \textbf{doi:}
        \href{https://doi.org/\@doi}{\@doi}
        \fi
    }
    {
        \ifdefined\@arxiv
        \textbf{arXiv:}
        \href{https://arxiv.org/abs/\@arxiv}{\@arxiv}
        \fi
    }
    {
        \ifdefined\@uri
        \href{https://\@uri}{\texttt{\@uri}}
        \fi
    }
    \hrule
    \vspace{.5em}
    \thispagestyle{empty}
}