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% --------------------------------------------------------------------------
% the SNOTEZ package
% 
%   Sidenotes for LaTeX2e
% 
% --------------------------------------------------------------------------
% Clemens Niederberger
% Web:    https://bitbucket.org/cgnieder/snotez/
% E-Mail: contact@mychemistry.eu
% --------------------------------------------------------------------------
% Copyright 2012--2020 Clemens Niederberger
% 
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008/05/04 or later.
% 
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is Clemens Niederberger.
% --------------------------------------------------------------------------
\documentclass[load-preamble+]{cnltx-doc}
\setlength\textwidth{\dimexpr\textwidth-1.2\marginparwidth\relax}
\setlength{\marginparwidth}{2\marginparwidth}

\usepackage[footnote,perpage]{snotez}
\setcnltx{
  package  = snotez ,
  authors  = Clemens Niederberger ,
  email    = contact@mychemistry.eu ,
  url      = https://bitbucket.org/cgnieder/snotez ,
  info     = sidenote support for \LaTeXe ,
  add-cmds = {
    newsnotezfloat ,
    setsidenotes ,
    sidenote ,
    sidenotemark ,
    sidenotetext ,
    thesidenote ,
  } ,
  add-silent-cmds = {
    @captype, @car ,@cdr , @currentlabel , @nil ,
    @the@snotez@mark ,
    @x@sf ,
    cnltx@create@generic@message ,
    ifltxcounter ,
    MakeSorted , MakeSortedPerPage ,
    marginnote ,
    pgfkeys , pgfqkeys ,
    protected@edef , protected@xdef ,
    RaggedRight ,
    snotez@date ,
    snotez@description ,
    snotez@error ,
    snotez@error@message ,
    snotez@format ,
    snotez@if@nblskip ,
    snotez@marginnote , snotez@marginpar ,
    snotez@mark ,
    snotez@new@sidefloat ,
    snotez@note@mark@format ,
    snotez@note@mark@sep ,
    snotez@sidefloat@box ,
    snotez@sidefloat@format ,
    snotez@sidenote@aux ,
    snotez@sidenote@dblarg ,
    snotez@sidenote@dblarg@aux ,
    snotez@sidenote@nodblarg ,
    snotez@sidenote@nodblarg@aux ,
    snotez@sidenotetext@aux ,
    snotez@sidenotetext@dblarg ,
    snotez@sidenotetext@dblarg@aux ,
    snotez@sidenotetext@nodblarg ,
    snotez@sidenotetext@nodblarg@aux ,
    snotez@text ,
    snotez@text@mark@format ,
    snotez@version ,
    snotez@write@mark ,
    snotez@warning ,
    textsu
  } ,
  makeindex-setup = {columns=3, columnsep=1em}
}

\defbibheading{bibliography}[\bibname]{\addsec{References}}

\makeatletter
\newcommand*\defaultsidenotes{%
  \setsidenotes{
    note-mark-format = \@textsuperscript{\normalfont\normalcolor##1},
    text-format      = \normalfont\normalcolor\footnotesize
  }}
\makeatother
\setsidenotes{
  note-mark-format=#1.,
  text-mark-format=\textsu{\hspace*{.04em}#1},
  text-format+=\RaggedRight
}

\renewrobustcmd*\sinceversion[1]{%
  \sidenote{\GetTranslation{cnltx-introduced}~#1}%
}
\renewrobustcmd*\changedversion[1]{%
  \sidenote{\GetTranslation{cnltx-changed}~#1}%
}

\newname\kohm{Markus Kohm}
\newname\tennent{Bob Tennent}
\newname\thomas{Andy Thomas}

\begin{document}

\section{License and Requirements}\label{sec:license}
\license

\snotez\ needs and loads the packages
\pkg{etoolbox}\sidenote(*-2){\textcite{pkg:etoolbox}},
\pkg{pgfopts}\sidenote(*-1){\textcite{pkg:pgfopts}},
\pkg{marginnote}\sidenote{\textcite{pkg:marginnote}} and
\pkg{perpage}\sidenote{\textcite{pkg:perpage}}.

\section{Motivation}\label{sec:motivation}
This has just been an exercise on a lazy
afternoon\sidenote{\url{https://www.youtube.com/watch?v=OU6EyXcFBxA}}.  Well,
in the beginning at least.  Since there already is \thomas' \pkg{sidenotes}
package\sidenote{\textcite{pkg:sidenotes}} there is probably no real need for
\snotez.  Moreover, the tufte classes\sidenote{\textcite{cls:tufte}} as well
as \cls{memoir}\sidenote{\textcite{cls:memoir}} also provide corresponding
mechanisms.  Besides the fun I had my motivation was also based on the fact
that I didn't like some things done by the \pkg{sidenotes} package such as
inserting kerns and superscripted commas for multiple marks.  I prefer to let
my \pkg{fnpct}\sidenote{\textcite{pkg:fnpct}} package handle these things.
Anyways, here it is and it seems to be working as intended so I don't see a
reason why it shouldn't be available for use.

By the way: the \pkg{fnpct} package~v0.2k and later knows about \snotez\ and
automatically adapts the note commands!

\section{Introduction}\label{sec:introduction}
The \snotez\ package introduces a \cs{sidenote} command%
\begingroup\defaultsidenotes
\sidenote{This is an example demonstrating the default appearance.}
\endgroup
that typesets sidenotes the same way \cs*{footnote} typesets footnotes.  It
provides some options that allow formatting the appearance of the
sidenotes\sidenote{In all sidenotes in this document the mark is typeset
  on the baseline and the text is set ragged right.}.  As a default sidenotes
are typeset in a \cs*{marginpar} but there are possibilities using \kohm's
\pkg{marginnote}~\cite{pkg:marginnote} package as well.

As with footnotes it is possible to set mark and text separately using the
equivalent commands \cs{sidenotemark} and \cs{sidenotetext}, respectively.
Instead of lots of code examples this documentation will use the \cs{sidenote}
macro itself extensively.  It is assumend you know how to use \cs*{footnote}
and are able to transfer your knowledge.

\section{Usage}\label{sec:usage}
The basic usage is the very same as with \LaTeX's \cs*{footnote},
\cs*{footnotemark} and \cs*{footnotetext}.  Unsurprisingly the presented
commands are these:
\begin{commands}
  \command{sidenote}[\oarg{mark}\marg{text}]
    The basic command.  The syntax is the very same as for \cs*{footnote}.
  \command{sidenote}[\darg{offset}\oarg{mark}\marg{text}]
    Actually I lied: \cs{sidenote} has a second option that smuggles itself
    before the \meta{mark} option if you use it: an argument for a vertical
    offset that takes a length. An empty second option assumes you want the
    automatic mark.  If you use this argument the note is set with the
    \cs*{marginnote} command\sidenote(*-1){From the \pkg{marginnote}
      package}.  Please see its documentation\sidenote{For example with
      \code{texdoc marginnote} on your command line.}~\cite{pkg:marginnote}
    for the \meta{offset} argument.  \snotez\ only passes the value on.
    
    Actually, this is only part of the truth: while typing this documentation
    I repeatedly found myself shifting notes by multiples of
    \cs*{baselineskip} so the argument accepts a shortcut for this.  A star
    \code{*} followed by a (positive or negative) number denotes a multiple of
    \cs*{baselineskip}.  By the way: a positive value shifts the note
    \emph{down}.
    
    When you're using the \keyis{dblarg}{true} option the \meta{offset}
    argument has square brackets instead of parentheses!
  \command{sidenotemark}[\oarg{marg}]
    This command has the same purpose as \cs*{footnotemark} but for
    sidenotes.
  \command{sidenotetext}[\oarg{mark}\marg{text}]
    The same as \cs*{footnotetext} but for sidenotes.  Beware where you place
    it: it calls \cs*{marginpar} or \cs*{marginnote} and thus determines where
    the actual note is placed.
  \command{sidenotetext}[\darg{offset}\oarg{mark}\marg{text}]
    I lied again: \cs{sidenotetext} also has the second optional argument
    \meta{offset} that again smuggles itself before the \meta{mark} option if
    you use it.  For details see the second description of the \cs{sidenote}
    command.
\end{commands}

Here is one short example of the usage.

\begin{sourcecode}
  % produces a sidenote with automatic number in a
  % \marginpar:
  \sidenote{A note}
 
  % produces a sidenote with mark `a' in a
  % \marginpar:
  \sidenote[a]{A note}
 
  % produces a sidenote with automatic number in a
  % \marginnote:
  \sidenote(){A note}
  % alternative syntax (dblarg=true):
  \sidenote[][]{A note}
 
  % produces a sidenote with automatic number in a
  % \marginnote shifted down by \baselineskip:
  \sidenote(*){A note}
  % alternative syntax (dblarg=true):
  \sidenote[*][]{A note}
 
  % produces a sidenote with automatic number in a
  % \marginnote shifted up by 2ex:
  \sidenote(-2ex){A note}
  % alternative syntax (dblarg=true):
  \sidenote[-2ex][]{A note}
 
  % produces a sidenote with mark `a' in a
  % \marginnote shifted down by 2\baselineskip:
  \sidenote(*2)[a]{A note}
  % alternative syntax (dblarg=true):
  \sidenote[*2][a]{A note}
\end{sourcecode}

\section{Figures in the Margin}\label{sec:figures-margin}
In the case of small figures or tables one might want to place them in the
margin, too.  Especially in a document with a larger margin than it is in the
standard classes.

For these cases \snotez\ provides\sinceversion{0.5} these environments:
\begin{environments}
  \environment{sidefigure}
    Places a figure in the margin within a \cs*{marginpar}.  \cs*{caption} can
    be used in the usual way.
  \environment{sidetable}
    Places a table in the margin within a \cs*{marginpar}.  \cs*{caption} can
    be used in the usual way.
\end{environments}

In order to be able to place other floats in the margin, too, \snotez\
provides the following command:
\begin{commands}
  \command{newsnotezfloat}[\oarg{code}\marg{name}]
    This defines a new environment \code{side}\meta{name}.  \meta{code} would
    be placed after the formatting from \option{sidefloat-format} but before
    the environment's contents.
\end{commands}
Both existing environments have been defined with this command.
\begin{sourcecode}
  \newsnotezfloat{figure}
  \newsnotezfloat{table}
\end{sourcecode}

\section{Options}\label{sec:options}
Although all options can be used as package option you can also set all options
(locally) with a setup command:
\begin{commands}
  \command{setsidenotes}[\marg{options}]
    Set options as a comma-separated list of key/value pairs.
\end{commands}
Available options are these:
\begin{options}
  \keybool{dblarg}\Default{false}\label{key:dblarg}%
    Prior to version~0.3 \snotez' \cs{sidenote} and \cs{sidenotetext} had both
    their optional arguments with square brackets where the use of one argument
    referred to the mark but when both were used the first argument referred
    to the offset and the second to the mark.  This syntax is kept with this
    option.  Setting it to \code{true} changes the \darg{offset} argument
    syntax into \oarg{offset}.
  \keybool{marginnote}\Default{false}
    Use \pkg{marginnote}'s \cs*{marginnote}~\cite{pkg:marginnote} for all
    \cs{sidenote}s.  In the default setting \cs{sidenote} uses
    \cs*{marginpar}s to set the sidenote unless you use the \meta{offset}
    argument.  If you use this option \emph{all} sidenotes are set with
    \cs*{marginnote}.  \emph{This option can only be used in the preamble}.
  \keyval{text-format}{code}\Default{\cs*{normalfont}\cs*{footnotesize}}
    The format of the sidenote text.
  \keyval{text-format+}{code}\Default
    Code to be appended to the format set with
    \option{text-format}\sidenote{This document, for example, appends
      \pkg{ragged2e}'s \cs*{RaggedRight}~\cite{pkg:ragged2e} to the
      sidenote's format.}.
  \keybool{perpage}\Default{false}
    \emph{This option can only be set in the preamble}.  Make sidenotes
    counter per page.  It uses package \pkg{perpage}'s~\cite{pkg:perpage}
    \cs*{MakeSortedPerPage} macro for the task.  Otherwise the macro
    \cs*{MakeSorted} is used.  In the default setting sidenotes are counted 
    per chapter.  If you want sidenotes counted document-wise together with a
    class that defines a counter \code{chapter} then use for example the
    package \pkg{chngcntr}~\cite{pkg:chngcntr} and issue
    \cs*{counterwithout}\Marg{sidenote}\Marg{chapter} after loading \snotez.
    This documentation is an example for the use of the option.
  \keyval{note-mark-sep}{code}\Default{\cs*{space}}
    The separator between sidenote mark and sidenote text in the sidenote.
  \keyval{note-mark-format}{code}\Default{\cs*{@textsuperscript}\Marg{\cs*{normalfont}\#1}}
    The format of the sidenote mark in the sidenote.  Please refer to the
    actual mark with \code{\#1}.
  \keyval{text-mark-format}{code}\Default{\cs*{@textsuperscript}\Marg{\cs*{normalfont}\#1}}
    The format of the sidenote mark in the text\sidenote(*-1){This document
      uses \tennent's \pkg{libertine} package~\cite{pkg:libertine} and
      redefines the mark formats to use its \cs*{textsu} command.}.  Please
    refer to the actual mark with \code{\#1}.
  \keybool{footnote}\Default{false}
    \emph{This option can only be used in the preamble}. Let\sidenote{In
      the sense of \cs*{let}} \cs*{footnote} to be \cs{sidenote},
    \cs*{footnotemark} to be \cs{sidenotemark} and \cs*{footnotetext} to be
    \cs{sidenotetext}.
  \keyval{sidefloat-format}{code}\Default{\cs*{raggedright}}
    The format of the contents of a sidefloat environment
    text\sinceversion{0.5}.
  \keyval{sidefloat-format+}{code}
    Code to be appended to the format set with
    \option{sidefloat-format}\sinceversion{0.5}.
\end{options}

\clearpage
As a short example this is how the sidenotes for this document are formatted:
\begin{sourcecode}
  \setsidenotes{
    note-mark-format=#1.,
    text-mark-format=\textsu{\hspace*{.04em}#1},
    text-format+=\RaggedRight,
    perpage=true
  }
\end{sourcecode}


\section{Implementation}
In the following code the lines 1--30 have been omitted. They only repeat the
license statement which has already been mentioned in section~\ref{sec:license}.

\implementation[
  linerange={31-1000},
  firstnumber=31,
  basicstyle=\ttfamily\footnotesize
]{snotez.sty}

\indexprologue{\noindent Package names are indicated {\packageformat sans
    serif}, commands \code{\textbackslash\textcolor{cs}{brown}} and options
  \textcolor{option}{\code{yellow}}.\par\bigskip}
 
% \printindex

\end{document}