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% The parnotes package
% Notes after every paragraph, or elsewhere
% Copyright 2012, Michael Hughes
%
% This work is distributed under the LaTeX Project Public License,
% version 1.3 or later, available at
% http://www.latex-project.org/lppl.txt
% I currently maintain this project and will receive error reports at
% mcrh <at> uw <dot> edu
%
% This package was started due to a question at the TeX Stack Exchange:
% http://tex.stackexchange.com/questions/34746/
%
% Thanks to Stack Exchange users Ahmed Musa and Bruno Le Floch
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{parnotes}[2012/01/03 rev. 1 Notes after every paragraph, or elsewhere]
%
% These are the user-modifiable format commands
%
% Format for parnotes - \PN@notes@shape is \rmfamily by default
\providecommand{\parnotefmt}[1]{\footnotesize%
\PN@notes@shape\PN@narrower@optional\noindent #1}
% Format for parnote marks - \PN@mark@set is \arabic by default
\providecommand{\parnotemarkfmt}[1]{\textsuperscript{\PN@mark@set{#1}}}
% Minimum vertical space before and after parnotes
\providecommand{\parnotevskip}{\medskipamount}
% Full command used between parnotes
\providecommand{\parnoteintercmd}{\hspace{1em}}
%
% Internal variables below this line
%
% This holds all the parnote text
\global\def\PN@text{}
% Counter for parnote marks left by \parnote
\global\newcount\c@PN@t
% Counter for parnote marks *within* parnotes
\global\newcount\c@PN@n
% autopn environment name
\def\@PN@autopn{autopn}
% True if currently setting parnotes
\newif\ifPN@inparnotes
% Commands used to disable indentation for the next paragraph
\def\PN@disable@indent{\@afterindentfalse\@afterheading}
%
% Optionally reset the counter within \parnotes
%
\let\PN@reset@optional\relax
\DeclareOption{restart}{\def\PN@reset@optional{%
\global\c@PN@t=\z@
\global\c@PN@n=\z@
}}
%
% Parnote marks are arabic by default, but an option changes them to roman
%
\let\PN@mark@set\arabic
\DeclareOption{roman}{\let\PN@mark@set\roman}
% breakwithin just changes \parnoteintercmd
\DeclareOption{breakwithin}{\renewcommand{\parnoteintercmd}{\\}}
% And indentafter just clears \PN@disable@indent
\DeclareOption{indentafter}{\let\PN@disable@indent\relax}
%
% Set parnotes using \narrower if that option is specified
%
\let\PN@narrower@optional\relax
\DeclareOption{narrower}{\let\PN@narrower@optional\narrower}
%
% Font-changing options
%
\let\PN@notes@shape\rmfamily
\DeclareOption{notesrm}{\let\PN@notes@shape\rmfamily}
\DeclareOption{notessf}{\let\PN@notes@shape\sffamily}
\DeclareOption{notesit}{\let\PN@notes@shape\itshape}
% Finally process the options
\ProcessOptions\relax
\long\def\PN@parnote@real#1{%
% Advance the counter used in TEXT immediately
\global\advance\c@PN@t\@ne
%
% Then add the command's argument to a macro to be called at the end
% of the paragraph (or wherever \parnotes gets called)
%
\g@addto@macro\PN@text{%
% Advance the counter used in the parnotes as the parnotes are set
\global\advance\c@PN@n\@ne
\parnotemarkfmt{PN@n}\nolinebreak\thinspace#1%
%
% This way, if the in-text counter equals the in-note counter, we
% know that we're at the final parnote for this batch and
% \parnoteintercmd shouldn't be executed
%
\unless\ifnum\c@PN@n=\c@PN@t
\parnoteintercmd
\fi
}%
\unskip\parnotemarkfmt{PN@t}%
}
%
% \parnote calls \PN@parnote@real if in typesetting mode, but does nothing
% elsewhere (i.e., in the table of contents) - this is based on the stable
% option of the footmisc package
%
\long\def\parnote{%
\ifx\protect\@typeset@protect
\expandafter\PN@parnote@real
\else
\expandafter\@gobble
\fi
}
\def\PN@parnotes@real{%
% We call \par later, so this avoids recursion with \PN@parnotes@auto
\PN@inparnotestrue
%
% Get into vmode if we aren't already
%
\unless\ifvmode
\par
\fi
% Avoid page breaks between a paragraph and its parnotes
\nopagebreak\addvspace{\parnotevskip}%
% \parnotefmt goes in a separate group to avoid having formatting
% commands and local redefinitions of \parnotemarkfmt contaminate the
% following paragraphs
{\parnotefmt{\PN@text}\par}%
\global\def\PN@text{}%
\addvspace{\parnotevskip}%
%
% These can be enabled or disabled by package options
%
\PN@disable@indent
\PN@reset@optional
\PN@inparnotesfalse
}
\newenvironment{autopn}{%
%
% Insert \PN@parnotes@auto into \par and \@par
% We can't just do \@setpar{\PN@parnotes@auto\@@par} since autopn
% could be nested within a list
%
\let\PN@par\par
\def\par{\PN@parnotes@auto\PN@par}%
\def\@par{\PN@parnotes@auto\@@par}%
}
{\PN@parnotes@auto} % At the environment's end, set any notes we've missed
%
% If a user calls \parnotes, check that there are parnotes to set
%
\def\parnotes{%
\unless\ifx\PN@text\@empty
\expandafter\PN@parnotes@real
\fi
}
%
% If autopn calls parnotes, check for nested environments, and that this
% isn't a call to \par from within \PN@parnotes@real, AND that there are
% parnotes to set
%
\def\PN@parnotes@auto{%
\ifx\@currenvir\@PN@autopn
\unless\ifPN@inparnotes
\unless\ifx\PN@text\@empty
\expandafter\PN@parnotes@real
\fi
\fi
\fi
}
%
% Reset both mark counters to 0
%
\def\parnotereset{%
\global\c@PN@t=\z@
\global\c@PN@n=\z@
}
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