Automatic Paragraph Numbering

Question

I am trying to create a LaTeX document that will automatically number paragraphs without the need to use \paragraph - the reason for this is that I am processing text that will be written by others who do not use LaTeX.

Edit: this is why the solution at paragraph numbering does not address my particular problem as it requires that \paragraph is replaced by \item. This gives me the same problem as far as I can tell.

I have searched for several solutions which have helped me make progress and also warned that the use of \everypar can be problematic... The current situation is that I almost have a solution but a new \section or \subsection causes the subsequent paragraph to drop the numbering as shown in the attached image. Further paragraphs are numbered correctly.

Alternative numbering solutions would be acceptable to me - I have no real preference for whether the paragraph numbers flow consecutively through all sections or follow a within-section pattern.

My minimal working example is as follows (note I have a need to use the \titlesec package to make the document look pretty). I am really scratching my head about this one - any help or pointers will be gratefully received!

\documentclass[11pt]{article}
\usepackage{lipsum}
\usepackage{titlesec}    
\setcounter{secnumdepth}{3}

\newcounter{para}
\newcommand*{\numberedparagraph}{%
\refstepcounter{para}
\textbf{\thepara.\space}
}

\let\oldep\everypar\newtoks\everypar  
\oldep{\the\everypar\everypar{\numberedparagraph}}

\begin{document}

\everypar{\numberedparagraph}

\section{Section 1}

\lipsum[1-2]

\section{Section 2}

\lipsum[4-5]

\subsection{A Subsection}

\lipsum[6-7]

\end{document}

See question https://tex.stackexchange.com/questions/305220/paragraph-numbering?rq=1 — bmv, Dec 21 '17 at 12:48
Thanks for having a look at this. I had already looked at that question and I think my situation is different. The solution linked to just seems to replace the need to use \paragraph with a need to use \item so it gives me the same problem really...? — quabbage, Dec 21 '17 at 12:55
Perhaps Non-Hierarchical Paragraph Numbering may help. It uses \everypar but addresses \section etc. — Nicola Talbot, Dec 21 '17 at 13:09
I don't think it's a dup since OP wants an automated method (that is, use \everypar without interruption by sectioning commands). — Nicola Talbot, Dec 21 '17 at 13:12
@NicolaTalbot that link looks promising - thank you. It seems that I have to redefine \@afterheading. This sounds a bit scary but I will try to figure it out :) — quabbage, Dec 21 '17 at 13:21

score 5 · Accepted Answer · answered Dec 21 '17 at 13:34

Thank you to @NicolaTalbot for pointing me in the right direction.

The solution was to redefine \@afterheading. This then wasn't quite right as the indentation of paragraph numbers was a bit awry so I solved that by setting the paragraph indentation to 0.

Corrected code and image follow:

\documentclass[11pt]{article}
\usepackage{lipsum}
\usepackage{titlesec}
\setcounter{secnumdepth}{3}

\setlength{\parindent}{0em} % indent subsequent paragraphs

\newcounter{para}
\newcommand*{\numberedparagraph}{%
    \refstepcounter{para}
    \textbf{\thepara.\space}
}

\let\oldep\everypar\newtoks\everypar  
\oldep{\the\everypar\everypar{\numberedparagraph}}


\makeatletter %
\renewcommand{\@afterheading}{%
  \@nobreaktrue
\everypar{%
    \if@nobreak
      \@nobreakfalse
      \clubpenalty\@M
      \if@afterindent
      \else
    {\setbox\z@\lastbox}%
  \fi
\else
  \clubpenalty\@clubpenalty
  \everypar{\numberedparagraph}% <- modification
\fi
\numberedparagraph% <- modification
  }%
}


\begin{document}



\everypar{\numberedparagraph}

\section{Section 1}

\lipsum[1-2]

\section{Section 2}

\lipsum[4-5]

\subsection{A Subsection}

\lipsum[6-7]

\end{document}

You have extra spaced because of line endings without percent: → https://tex.stackexchange.com/questions/7453/what-is-the-use-of-percent-signs-at-the-end-of-lines — Schweinebacke, Dec 21 '17 at 19:14
@Schweinebacke thanks for the tip. This isn't something I currently understand but I will read the link, cheers. — quabbage, Dec 22 '17 at 11:14

Automatic Paragraph Numbering

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