% -*- coding: utf-8; time-stamp-format: "%02d-%02m-%:y at %02H:%02M:%02S %Z" ; time-stamp-active: nil -*-
% N.B.: this dtx file does NOT use \DocInput.  It does NOT prefix the user
% manual part with percent characters.
%<*none>
\def\etocdtxtimestamp {Time-stamp: <01-03-2023 at 23:38:38 CET>}%
%</none>
%<*!readme>
%%
%% Package: etoc
%% Version: 1.2
%% License: LPPL 1.3c
%% Copyright (C) 2012-2023 Jean-Francois Burnol
%%                         <jfbu at free dot fr>
%</!readme>
%<*none>
\def\etocpkgdate        {2023/03/01}
\def\etocdocdate        {2023/03/01}
\def\etocpkgversion     {1.2}
\def\etocpkgdescription {Completely customisable TOCs (JFB)}
%% Formerly this etoc.dtx also included source for a German translation
%% etoc-DE.pdf.  But all additions since April 2015 had been only in English.
%% Since 1.09f of 2022/08/30 etoc-DE.pdf is not produced anymore and the
%% existing translated sections have been removed from this etoc.dtx.
% Definition of \etocLicense
% --------------------------
\begingroup
    \long\def\firstofone #1{#1}\catcode1=14\catcode2=0
    \catcode`\%=12\catcode`\_=12\endlinechar13\catcode13=13 ^^A
    \catcode32=13\catcode`\\=12^^Brelax^^A
^^Bfirstofone{^^Bendgroup^^Bdef^^BetocLicense^^A
{% Package: etoc
% Version: 1.2
% License: LPPL 1.3c
% Copyright (C) 2012-2023 Jean-Francois Burnol <jfbu at free dot fr>
%
%     This Work may be distributed and/or modified under the
%     conditions of the LaTeX Project Public License, in its
%     version 1.3c. This version of this license is in
%          http://www.latex-project.org/lppl/lppl-1-3c.txt
%     and the latest version of this license is in
%          http://www.latex-project.org/lppl.txt
%     and version 1.3 or later is part of all distributions of
%     LaTeX version 2005/12/01 or later.
%
% The Author of this Work is:
% Jean-Francois Burnol <jfbu at free dot fr>
%
% This Work consists of the main source file etoc.dtx and the derived
% files etoc.sty, etoc.tex, etoc.pdf, etoc.dvi, README.md.
%
% Running etex (or latex or pdflatex) on etoc.dtx extracts etoc.sty,
% etoc.tex and README.md. See README.md for further instructions.
}}%
\bgroup\catcode2 0 \catcode`\\ 12 ^^Biffalse
%</none>
%<*readme>
<!-- -->

    Source:  etoc.dtx (1.2)
    Author:  Jean-Francois Burnol
    Info:    Completely customisable TOCs
    License: LPPL 1.3c
    Copyright (C) 2012-2023 Jean-Francois Burnol.
    <jfbu at free dot fr>

ABSTRACT
========

With `etoc` loaded, `\tableofcontents` can be used multiple times and
an added command `\localtableofcontents` allows to typeset "local"
tables of contents, i.e. having their scope limited to the last
sectioning command encountered.

No auxiliary file is used additionally to the standard `.toc` file.
Release 1.2 provides experimental additions `\locallistoffigures` and
`\locallistoftables` which also use only the `.toc` file.

Such local TOCs or "Lists Of" typically need to adopt a "display
style" (i.e. the way the title is rendered, whether it should add
itself an entry in the `.toc` file, ...) somewhat distinct from the
global TOC.  The release 1.2 default adapts automatically the titles
of local TOCs to their depths in the sectioning hierarchy.  Should the
need arise to customize such "display style", full control is allowed
by package commands.

Regarding how the individual "contents lines" are handled, here again
complete control is given to the user to define from the ground-up how
to use the *name*, *number*, and *page number* for each entry,
according to their "levels" (i.e. part, chapter, section, subsection,
...).  As this requires some LaTeX fluency, many examples which can
serve as starting points are attached to the PDF documentation as
extractible files.

Loading `etoc` per itself modifies nothing to "contents lines"
rendering from the class default or changes from other packages.  But
full usage of the package allows spectacular effects such as displaying
TOCs as trees or mind maps.


INSTALLATION
============

For manual installation do `etex etoc.dtx` to extract files then move
`etoc.sty` to a place where TeX can find it.

    etoc.sty    -> TDS:tex/latex/etoc/etoc.sty
    etoc.dtx    -> TDS:source/latex/etoc/etoc.dtx
    etoc.pdf    -> TDS:doc/latex/etoc/etoc.pdf
    README.md   -> TDS:doc/latex/etoc/README.md

To produce `etoc.pdf` run pdflatex on the extracted file `etoc.tex`
sufficiently many times (`latexmk -pdf etoc` is recommended).


LICENSE
=======

This Work may be distributed and/or modified under the
conditions of the LaTeX Project Public License, in its
version 1.3c. This version of this license is in

> <http://www.latex-project.org/lppl/lppl-1-3c.txt>

and the latest version of this license is in

> <http://www.latex-project.org/lppl.txt>

and version 1.3 or later is part of all distributions of
LaTeX version 2005/12/01 or later.

The Author of this Work is Jean-Francois Burnol <jfbu at free dot fr>

This Work consists of the main source file etoc.dtx and the derived files
etoc.sty, etoc.tex, etoc.pdf, etoc.dvi.


RECENT CHANGES
==============

This is `1.2` of `2023/03/01`.

`1.1a` up to `1.1d` were mainly about refactoring core legacy code
dating back to the earliest versions of the package.  The initial
stimulus came from the necessity to prepare for changes to how
hyperref and the LaTeX kernel will interact in the future.

`1.2` added `\locallistoffigures` and `\locallistoftables`.  One must
pass options `lof` and `lot` to the package to activate these
experimental features.

The initial default rendering of the titles of tables of contents now
uses the emulated document class code only for the global ones
(`\tableofcontents`); for local ones (`localtableofcontents` and the
new "local lists of") it uses by default a context aware title
(such as `\subsection*` if local to a section).  Thus, usage of
`\etocsettocstyle` is now purely optional.  Regarding the
"line styles", the package has always used the unaltered rendering
from the document class, so using the other core customization command
`\etocsetstyle` to truly unleash the package powers has always been
optional.

Shoud they dare to go check the PDF documentations, users will
discover that it has been completely restructured at release `1.2`, to
the extent allowed by random permutations of topics, and that many
commands have been added to facilitate usage of `\etocsettocstyle`.
%</readme>
%<*tex>-------------------------------------------------------------------------
%% To produce the documentation etoc.pdf with source code included:
%%   latexmk -pdf etoc.tex
%% (or sufficiently many times pdflatex etoc.tex)
%% For customizations see comments and classe options below.
\tracinglostchars3
\chardef\Withdvipdfmx 0 % replace 0 by 1 for using latex+dvipdfmx
\chardef\NoSourceCode 0 % replace 0 by 1 for the doc *without* the source code
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile {etoc.tex}[Driver for etoc documentation]%
\PassOptionsToClass   {a4paper,fontsize=10pt,twoside}{scrartcl}
\PassOptionsToPackage {ngerman,english}{babel}
\input etoc.dtx
%%% Local Variables:
%%% mode: latex
%%% End:
%</tex>-------------------------------------------------------------------------
%<*none>------------------------------------------------------------------------
^^Bfi^^Begroup
%
\chardef\noetex 0
\ifx\numexpr\undefined\chardef\noetex 1 \fi
\ifnum\noetex=1 \chardef\extractfiles 0 % extract files, then stop
\else
    \ifx\ProvidesFile\undefined
      \chardef\extractfiles 0 % etex etc.. on etoc.dtx, only file extraction.
    \else % latex/pdflatex on etoc.tex or on etoc.dtx
      \ifx\Withdvipdfmx\undefined
        % latex/pdflatex run is on etoc.dtx
        \chardef\extractfiles 1 % 1 = extract files and typeset manual, 2 = only typeset
        \chardef\Withdvipdfmx 0 % 0 = pdflatex or latex+dvips, 1 = dvipdfmx
        \chardef\NoSourceCode 1 % 0 =  include source code, 1 = do not
        \NeedsTeXFormat {LaTeX2e}%
        \PassOptionsToClass   {a4paper,fontsize=10pt,twoside}{scrartcl}%
        \PassOptionsToPackage {ngerman,english}{babel}%
      \else % latex run is on etoc.tex
        \chardef\extractfiles 2 % do not extract files, only typeset
      \fi
      \ProvidesFile{etoc.dtx}%
        [etoc source and documentation (\etocdtxtimestamp)]%
    \fi
\fi
\ifnum\extractfiles<2 % extract files
\def\MessageDeFin{\newlinechar10 \let\Msg\message
\Msg{********************************************************************^^J}%
\Msg{*^^J}%
\Msg{* To finish the installation you have to move the following^^J}%
\Msg{* file into a directory searched by TeX:^^J}%
\Msg{*^^J}%
\Msg{*\space\space\space\space etoc.sty^^J}%
\Msg{*^^J}%
\Msg{* To produce the documentation with source code included execute^^J}%
\Msg{* latexmk -pdf etoc.tex^^J}%
\Msg{*^^J}%
\Msg{* Happy TeXing!^^J}%
\Msg{*^^J}%
\Msg{********************************************************************^^J}%
}%
\begingroup
    \input docstrip.tex
    \askforoverwritefalse
    \generate{\nopreamble\nopostamble
    \file{README.md}{\from{etoc.dtx}{readme}}%
    \usepostamble\defaultpostamble
    \file{etoc.tex}{\from{etoc.dtx}{tex}}%
    \usepreamble\defaultpreamble
    \file{etoc.sty}{\from{etoc.dtx}{package}}}%
\endgroup
\fi % end of file extraction (from etex/latex/pdflatex run on etoc.dtx)
\ifnum\noetex=1 % warning for README.md
    \expandafter\def\expandafter\MessageDeFin\expandafter 
{\MessageDeFin
\Msg{* warning: to get correct utf-8 encoded README.md ^^J}%
\Msg{* do etex etoc.dtx and not as here tex etoc.dtx   ^^J}%
\Msg{********************************************************************^^J}}%
\fi
\ifnum\extractfiles=0 % tex/etex/xetex/etc on etoc.dtx, files extracted, stop
      \MessageDeFin\expandafter\end
\fi
% From this point on, run is necessarily with e-TeX.
% Check if \MessageDeFin got defined, if yes put it at end of run.
\ifdefined\MessageDeFin\AtEndDocument{\MessageDeFin}\fi
%-------------------------------------------------------------------------------
% START OF USER MANUAL TEX SOURCE
\documentclass{scrartcl}

\makeatletter
%%% START OF CUSTOM doc.sty LOADING (May 21, 2022 in xint.dtx)
%%% (August 26, 2022 here, comments trimmed)
%
% For some legacy reason (because I started like this and it
% worked to my satisfaction) I had used scrdoc.cls all those
% years, without in fact needing most of its features.
%
% It loads ltxdoc class, from which again I need very little.  On
% testing May 20, 2022 the upcoming LaTeX 2022-06-01 I had some
% problems with ltxdoc not having suitable interface for rolling
% back to doc=V2.
%
% ...
%
% Thus it turns out I need very little of doc.sty, and almost
% nothing of ltxdoc.cls and scrdoc.cls.
%
% (maybe provisory, try to see if usage of cross-hyperlinking
%  as in sourcexint.pdf makes sense here for rendering of
%  implementation part - loading time of etoc.pdf in viewer
%  in increased, though. 2022/08/26)
%
% Let's load the doc=V2 version to avoid having to work around
% hypdoc loading interfering with my use of hyperref.
\ifdefined\IfFormatAtLeastTF
  \IfFormatAtLeastTF{2022/06/01}%
  {%
    \IfFileExists{doc-2021-06-01.sty}%
     {\usepackage{doc}[=v2]}%
% Why on earth do I lose my time doing this?
     {\GenericError
          {(etoc build doc)\@spaces}%
          {etoc build error: %
      Your LaTeX installation seems to be broken, format is\MessageBreak
      2022-06-01 or later but `doc' package in its `v2' version\MessageBreak
      seems to not be available. \space Will try with `doc' but if\MessageBreak
      its `v3' is used there will be an option clash error\MessageBreak
      regarding hyperref.}%
          {}%
          {Please make sure `doc' package matches your LaTeX format.}%
      \usepackage{doc}%
     }%
  }%
  {\usepackage{doc}}%
\else
\usepackage{doc}
\fi
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% MACROS OF doc.sty WILL BE HACKED (2022/06/06) FOR THE IMPLEMENTATION PART
%
% First we want to turn CodelineNo into a real LaTeX counter
% This will spare defining an extra counter for the hyperlinks with \hyperref
\begingroup\let\newcount\@gobble\@definecounter{CodelineNo}\endgroup
% Let's now reenact the doc.sty default for \theCodeLineNo
\def\theCodelineNo{\reset@font\scriptsize\arabic{CodelineNo}}
% But as we will reset CodelineNo at each style file we need some unique id
\def\theHCodelineNo{\the\value{section}.\the\value{CodelineNo}}
% This is all for now.
% The further hacks are to be found after the \StopEventually (i.e. a few
% thousands lines down from here if you don't have access to the private
% sources, which is probably the case if you are not the author).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% As explained above I was formerly using scrdoc hence ltxdoc indirectly.
% Let's emulate here the little I appear to need from ltxdoc.cls and
% srcdoc.cls.
%
\AtBeginDocument{\MakeShortVerb{\|}}
\DeclareFontShape{OT1}{cmtt}{bx}{n}{<-> ssub * cmtt/m/n}{}
\DeclareFontFamily{OMS}{cmtt}{\skewchar\font 48}  % '60
\DeclareFontShape{OMS}{cmtt}{m}{n}{<-> ssub * cmsy/m/n}{}
\DeclareFontShape{OMS}{cmtt}{bx}{n}{<-> ssub * cmsy/b/n}{}
\DeclareFontShape{OT1}{cmss}{m}{it}{<->ssub*cmss/m/sl}{}
\ifnum\NoSourceCode=1
  \OnlyDescription
\fi
\CodelineNumbered
\EnableCrossrefs  % but this will be hacked
% \setcounter{StandardModuleDepth}{1} % we don't use this mechanism currently
\def\cmd#1{\cs{\expandafter\cmd@to@cs\string#1}}
\def\cmd@to@cs#1#2{\char\number`#2\relax}
% Here I am loading doc=v2 but formerly I was using ltxdoc via scrdoc
% which I dropped at release 1.4l (2022-05-29) and without much
% thinking I had kept this.
\DeclareRobustCommand\cs[1]{\texttt{\bslash#1}}
% As I may have the * active, or macro names with _ or ^, I should
% add \detokenize.  But see below for a redefinition anyhow.
%
% More urgent is that I am also using hyperref and this definition gives wrong
% bookmarks if \cs is used in section titles.  As I had very very few usags of
% \cs in the whole of xint.dtx, it took me a while to realize the problem
% here.  Turns out that doc=v3 by default loads hypdoc which includes this
% configuation for hyperref compatibility:
\AtBeginDocument{%
\pdfstringdefDisableCommands{\def\cs#1{\textbackslash\detokenize{#1}}}%
}%
% As I have not loaded hyperref yet I must delay it to AtBeginDocument.
\providecommand\marg[1]{%
  {\ttfamily\char`\{}\meta{#1}{\ttfamily\char`\}}}
\providecommand\oarg[1]{%
  {\ttfamily[}\meta{#1}{\ttfamily]}}
\providecommand\parg[1]{%
  {\ttfamily(}\meta{#1}{\ttfamily)}}
% \@addtoreset{CodelineNo}{part}% No need for this here
% \def\partname{File}% \partname is "fixed" somewhere further down anyhow
% No need for this, anyhow I don't build the indices
% \gdef\codeline@wrindex#1{\if@filesw
%       \begingroup
%         \let\protect\noexpand
%         \immediate\write\@indexfile
%             {\string\indexentry{#1}%
%             {\filesep\number\c@CodelineNo}}%
%       \endgroup\fi}
% \let\filesep\@empty

% There is very little we seem to need from the scrdoc extras: page geometry
% is set by geometry package and a4paper option from xint.tex file.  So it
% seems I only need the hologo loading:
\usepackage{hologo}
\DeclareRobustCommand*{\eTeX}{\hologo{eTeX}}%
\DeclareRobustCommand*{\LuaTeX}{\hologo{LuaTeX}}%
%
\makeatother
%%% end of ltxdoc+srcdoc emulation from June 2022 xint.dtx,
%%% copied over almost verbatim to etoc.dtx on 2022/08/26.
%%% See after \StopEventually for doc.sty hacks.

\makeatletter
% pour maintenir les % en début de ligne dans les blocs verbatim
   \let\original@check@percent\check@percent
   \let\check@percent\relax
\makeatother


% We got sensible result with attachfile or attachfile2
% only with pdflatex.  So this is remnant of earlier
% times when etoc.pdf was produced via latex+dvipdfmx

\usepackage{ifpdf}
\ifpdf\chardef\Withdvipdfmx 0 \fi

\makeatletter
\ifnum\Withdvipdfmx=1
   \@for\@tempa:=hyperref,bookmark,graphicx,xcolor,pict2e\do
            {\PassOptionsToPackage{dvipdfmx}\@tempa}
   %
   \PassOptionsToPackage{dvipdfm}{geometry}
   \PassOptionsToPackage{bookmarks=true}{hyperref}
   \PassOptionsToPackage{dvipdfmx-outline-open}{hyperref}
   \PassOptionsToPackage{dvipdfmx-outline-open}{bookmark}
   %
   \def\pgfsysdriver{pgfsys-dvipdfm.def}
\else
   \PassOptionsToPackage{bookmarks=true}{hyperref}
\fi
\makeatother

\usepackage[T1]{fontenc}
\usepackage[hscale=0.66,vscale=0.75]{geometry}

% Some problems with headers
\pagestyle{headings}
% \sectionmark uses \markboth in twoside but
% with an empty right mark!  As a result if a section starts
% on an odd page, it does not appear in the header mark.
% Perhaps there was a subsection of 3 lines on that page
% and it is the subsection which decides what is in the header.

% Some custom \sectionmark to get headers more to my taste.
% But it is hard to find algorithm giving satisfaction in all cases.

\makeatletter
\renewcommand *{\sectionmark }[1]{%
% Que c'est pénible cette syntaxe \markboth/\markright de LaTeX !
% Pourquoi est-ce que \markright n'a pas été définie comme #1#2-> truc avec #2 ??
  \if@twoside \expandafter \markboth \else 
   \expandafter\expandafter\expandafter \markright\expandafter \@firstoftwo
  \fi 
  {\MakeMarkcase {\Ifnumbered {section}{\sectionmarkformat }{}#1}}%
  {\MakeMarkcase {\Ifnumbered {section}{\sectionmarkformat }{}#1}}%
}

% Par ailleurs je vais remplacer \firstmark par \botmark dans \rightmark
% dont la définition par défaut est :

% \rightmark:
% macro:->\expandafter \@rightmark \firstmark \@empty \@empty 

\renewcommand*\rightmark{\expandafter\@rightmark\botmark \@empty\@empty}
% Au passage l'output de latexdef à un : supplémentaire bizarre
% $ latexdef botmark
%
% \botmark:
% \botmark:
%

% Néanmoins pour les \part il ne faut clairement pas utiliser \botmark
% Tous mes \part sont après un \clearpage explicite
% Je crois que le plus simple est encore de faire ceci:
\def\ps@mypartheadings{%
    \ps@headings
    \let\@evenhead\@empty
    \let\@oddhead\@empty
}

% peut-être serait-ce mieux de mettre le \thispagestyle après mon \clearpage,
% explicitement dans la source
\def\part{\thispagestyle{mypartheadings}\scr@startpart {part}}
\makeatother

% pour les environnements verbatim
% uniformisé finalement, avec quelques exceptions, pour dtx du 3 déc 2013
%\def\MacroFont{\ttfamily\small\hyphenchar\font45 \baselineskip11pt\relax}
% Je supprime le small finalement 2023/02/28 mais passe en 10pt
\def\MacroFont{\ttfamily\hyphenchar\font45\relax\setstretch{1}}


%----
% better \verb pour doc.
% 12 octobre 2013, importé de xint.dtx
% je rajoute pour { afin que truc{machin puisse avoir hyphénation
% retire \leavemmode, pas nécessaire pour emploi ici

% NOTE 9 mars 2015. J'ai depuis une version plus aboutie dans xint.dtx
% mais je laisse ici tel quel.

\def\MicroFont{\ttfamily\hyphenchar\font45 }
% modif de \do@noligs: \char`#1} --> \char`#1 }
\makeatletter 
\def\do@noligs #1%
{%
    \catcode `#1\active 
    \begingroup \lccode `\~=`#1\relax 
    \lowercase {\endgroup \def ~{\kern \z@ \char `#1 }}%
}% 
\def\dobackslash
{%
    \catcode92 \active 
    \begingroup \lccode `\~=92\relax 
    \lowercase {\endgroup \def ~{\kern \z@ \char 92 }}%
}% 
\def\dobraces
{%
    \catcode123 \active 
    \begingroup \lccode `\~=123\relax 
    \lowercase {\endgroup \def ~{\hskip \z@\@plus.1pt\@minus.1pt
                                 \char 123 }}%
    \catcode125 \active 
    \begingroup \lccode `\~=125\relax 
    \lowercase {\endgroup \def ~{\char 125 \hskip \z@\@plus.1pt\@minus.1pt }}%
}% 
\def\verb 
{%
  \relax \ifmmode\hbox\else\leavevmode\null\fi
  \bgroup \MicroFont
  \let\do\do@noligs  \verbatim@nolig@list
  \let\do\@makeother \dospecials 
  \catcode32 10 
  \dobackslash \dobraces \makestarlowast 
  \@jfverb 
}% 
\def\@jfverb #1{\catcode`#1\active
                \lccode`\~`#1\lowercase{\def~{\egroup\unskip}}}%
% (\unskip ajouté le 14 octobre)
% \lowast est défini plus loin
\begingroup
   \lccode`\~=`\*
\lowercase{%
\endgroup
\def\makestarlowast {\catcode`\*\active\let~\lowast}}%
\makeatother
%

%%%% FONT CONFIGURATION

\usepackage{txfonts}

% (2013) rescale the monospace font to 92% and allow hyphenation
% (2023) fix the missing rescaling of bold series of txttt
\DeclareFontFamily{T1}{txtt}{\hyphenchar\font 45\relax}
%\DeclareFontFamily{T1}{txtt}{\hyphenchar\font -1\relax}
\DeclareFontShape{T1}{txtt}{m}{n}{  %medium
     <->s*[.96] t1xtt%
}{}
\DeclareFontShape{T1}{txtt}{m}{sc}{ %cap & small cap
     <->s*[.96] t1xttsc%
}{}
\DeclareFontShape{T1}{txtt}{m}{sl}{ %slanted
     <->s*[.96] t1xttsl%
}{}
\DeclareFontShape{T1}{txtt}{m}{it}{ %italic
     <->ssub * txtt/m/sl%
}{}
\DeclareFontShape{T1}{txtt}{m}{ui}{     %unslanted italic
     <->ssub * txtt/m/sl%
}{}
% ---- /added here missing scale factor 2023
\DeclareFontShape{T1}{txtt}{bx}{n}{ %bold extended
     <->s*[.96] t1xbtt%
}{}
% The above s*[.96] added 2023/01/18, next two untested
\DeclareFontShape{T1}{txtt}{bx}{sc}{    %bold extended cap & small cap
     <->s*[.96] t1xbttsc%
}{}
\DeclareFontShape{T1}{txtt}{bx}{sl}{    %bold extended slanted
     <->s*[.96] t1xbttsl%
}{}
% ---- /end of 2023 fix
\DeclareFontShape{T1}{txtt}{bx}{it}{    %bold extended italic
     <->ssub * txtt/bx/sl%
}{}
\DeclareFontShape{T1}{txtt}{bx}{ui}{    %bold extended unslanted italic
     <->ssub * txtt/bx/sl%
}{}
\DeclareFontShape{T1}{txtt}{b}{n}{  %bold
     <->ssub * txtt/bx/n%
}{}
\DeclareFontShape{T1}{txtt}{b}{sc}{ %bold cap & small cap
     <->ssub * txtt/bx/sc%
}{}
\DeclareFontShape{T1}{txtt}{b}{sl}{ %bold slanted
     <->ssub * txtt/bx/sl%
}{}
\DeclareFontShape{T1}{txtt}{b}{it}{     %bold italic
     <->ssub * txtt/bx/it%
}{}
\DeclareFontShape{T1}{txtt}{b}{ui}{     %bold unslanted italic
     <->ssub * txtt/bx/ui%
}{}

% (2023) also rescale the txss sans serif (Helvetica)
\DeclareFontFamily{T1}{txss}{}
\DeclareFontShape{T1}{txss}{m}{n}{	%medium
     <->s * [0.89]t1xss%
}{}
\DeclareFontShape{T1}{txss}{m}{sc}{	%cap & small cap
     <->s * [0.89]t1xsssc%
}{}
\DeclareFontShape{T1}{txss}{m}{sl}{	%slanted
     <->s * [0.89]t1xsssl%
}{}
\DeclareFontShape{T1}{txss}{m}{it}{	%italic
     <->ssub * txss/m/sl%
}{}
\DeclareFontShape{T1}{txss}{m}{ui}{   	%unslanted italic
     <->ssub * txss/m/sl%
}{}
\DeclareFontShape{T1}{txss}{bx}{n}{	%bold extended
     <->s * [0.89]t1xbss%
}{}
\DeclareFontShape{T1}{txss}{bx}{sc}{	%bold extended cap & small cap
     <->s * [0.89]t1xbsssc%
}{}
\DeclareFontShape{T1}{txss}{bx}{sl}{	%bold extended slanted
     <->s * [0.89]t1xbsssl%
}{}
\DeclareFontShape{T1}{txss}{bx}{it}{	%bold extended italic
     <->ssub * txss/bx/sl%
}{}
\DeclareFontShape{T1}{txss}{bx}{ui}{  	%bold extended unslanted italic
     <->ssub * txss/bx/sl%
}{}
\DeclareFontShape{T1}{txss}{b}{n}{	%bold
     <->ssub * txss/bx/n%
}{}
\DeclareFontShape{T1}{txss}{b}{sc}{	%bold cap & small cap
     <->ssub * txss/bx/sc%
}{}
\DeclareFontShape{T1}{txss}{b}{sl}{	%bold slanted
     <->ssub * txss/bx/sl%
}{}
\DeclareFontShape{T1}{txss}{b}{it}{   	%bold italic
     <->ssub * txss/bx/it%
}{}
\DeclareFontShape{T1}{txss}{b}{ui}{   	%bold unslanted italic
     <->ssub * txss/bx/ui%
}{}
%


% Use the Bitter typeface for the romanfamily
\usepackage[scale=0.87]{bitter}

\AddToHook{begin/document/after}{%
    \renewcommand{\familydefault}{\sfdefault}%
    \rmfamily
}

\usepackage{xspace}
% added svgnames 2022/08/26 on occasion of transfer from xint colouring scheme
\usepackage[dvipsnames,svgnames]{xcolor}
\usepackage{graphicx}
\usepackage[inline]{enumitem}
\usepackage{array}
\usepackage{longtable}

\definecolor{joli}{RGB}{225,95,0}
\definecolor{JOLI}{RGB}{225,95,0}
\definecolor{BLUE}{RGB}{0,0,255}
\colorlet{niceone}{green!35!blue!75}
\colorlet{optioncolor}{Maroon}

% These colours mostly used only after stopeventually
\definecolor{etocnamecolor}{RGB}{228,57,0}
\colorlet{verbcolor}{Maroon}
\colorlet{privatecommentcolor}{cyan}
\colorlet{macrocodecommentcolor}{gray}
\colorlet{macrocodenewmacrocolor}{verbcolor}
\colorlet{macrocodelinktouserdoccolor}{etocnamecolor}% and bold face
\colorlet{macrocodelinktosectioncolor}{DarkBlue}% and bold face
\colorlet{macrocodelinktocodelinecolor}{Blue}
\colorlet{macrocodenoncscolor}{Green}

\usepackage {babel} % ngerman and english options have been passed to babel
\AtBeginDocument {%
% this may be obsolete as I don't use scrdoc or ltxdoc classes anymore
  \renewcommand\partname{Part}%
  \addto\captionsenglish {\renewcommand\partname{Part}}
}

\usepackage{tikz}
\usetikzlibrary{trees}    % added for "cyclic" grow function 2013/03/02
\usepackage{forest}[2015/05/04]
% switched from tikz-qtree to forest 2013/09/09
% No problem with hyperlinks then, contrarily to tikz-qtree.



% 12 mars 2015, pour 1.08a, see http://tex.stackexchange.com/a/232584/4686
\usetikzlibrary{mindmap} 
% Vendredi 13 mars 2015 à 18:10:40
% POUR LA TOC DE TITLE PAGE
\usepackage{eso-pic}
\usepackage{picture}
\usepackage{ragged2e}
% setspace usage added February 2023... (to accompany change of document font)
% It must be loaded before hyperref
\usepackage{setspace}

\usepackage{hyperref}% I had used [pdfencoding=pdfdoc] until 1.09f
\hypersetup{%
linktoc=all,%
%%linktoc=none,% STRESS TEST OF 1.1a
%% bookmarksdepth=3,% (not needeed anymore now, 1.07g)
breaklinks=true,%
colorlinks,%   
linkcolor=RoyalBlue,% Orchid
urlcolor=OliveGreen,%
pdfauthor={Jean-François Burnol},% on peut y aller maintenant avec ç en 2022...
pdftitle={The etoc package},%
pdfsubject={Tables of contents with LaTeX},%
pdfkeywords={LaTeX, table of contents},%
pdfstartview=FitH,%
%%pdfpagemode=UseOutlines,% commented-out for 1.09h
}
% added usage of package bookmark 2013/10/10
\usepackage{bookmark} 
\usepackage{varioref}

% Vendredi 16 septembre 2016
% pour rendre accessibles les exemples
% Fait package filecontentsdef le Samedi 17.
\usepackage{filecontentsdef}

%\ifnum\Withdvipdfmx=1
%% Attempts to use attachfile2 for latex+dvipdfmx fail:
%%
%% - 2016: (I did not record which version of attachfile2 was used)
%%         (this \the\value comment presumably refers to how I was using
%%         \attachfile at that time)
%%
%%   I have an issue that with \thesubsection or \the\value{section} in code
%%   snippet filename, the file is not correctly attached, it appears in the
%%   pdf interface but with a wrong filename and one can not obtain the file
%%   from the pdf (tested on Acrobat Reader 11 Vendredi 16 septembre 2016).
%%
%% - 2023 (January, 1.2, with 2019/11/26 v2.11):
%%
%%   I had to comment-out the mimetype, created and modified key settings.
%%   Then latex run passed but dvipdfmx complained with a dozen of
%%      dvipdfmx:warning: Object @atfi_obj_67 used, but not defined. Replaced by null.
%%   The Adobe Reader (same as in 2016...) Attachment panel lists a dozen of
%%      Inconnu in section 39
%%   lines clearly matching the dvipdfmx warnings.
%%
%%   The panel of Comments does display the list.  From there or from the
%%   Attachment panels one can recover the snippets.  The «etocsnippet» name
%%   is displayed in a strange greyed-out rendering, and one has to guess that
%%   CTRL-click gives access to the file.  (not different from pdflatex route)
%%
%%   I also tried with attachfile2.dtx from github at commit 660cea7 of May
%%   19, 2022, and the same problem with the Attachment panel was there.  Only
%%   difference I saw with attachfile2 from TL2022 was the ordering in the
%%   Attachment panel (with TL2022 attachfile2, the «Inconnu» lines were all
%%   grouped together).
%%
%%   So I can still not go via latex+dvipdfmx in 2023.  But the size reduction
%%   which is motivation for dvipdfmx was modest in this renewed testing,
%%   roughly 740Kb vs 840Kb with pdflatex.
%%
%  \usepackage[dvipdfmx]{attachfile2}
%% MEMO: I use \widthof in Linked list of the main package commands in
%%       a \makebox, since August 30, 2022, for 1.09f release.
%%       This requires calc, which is loaded only by attachfile among
%%       used packages; and calc is not loaded by attachfile2.
%  \usepackage{calc}
%\else
  \usepackage{attachfile}% no op with dvipdfmx
%\fi
% 
\def\CEST{+02'00'}\def\CET{+01'00'}
\def\ExtractDateStamp #1<#2-#3-#4 at #5:#6:#7 #8>%
    {D:#4#3#2#5#6#7\csname#8\endcsname}
\edef\DateForSamples {\expandafter\ExtractDateStamp\etocdtxtimestamp}
\attachfilesetup{%icon=Paperclip,% attention Paperclip pas PaperClip !!
                 mimetype=application/x-tex,
                 %appearance=false,
% These comments and next are from November 19, 2022
%                 author={Jean-François Burnol},
%                 author={\pdfescapestring{Jean-François Burnol}},
% TODO: resolve this at some point in my future life
                 author={Jean-Francois Burnol},
% doing this has fixed the date shown in Acrobat annotation panel
% but now some strange seemingly unrelated date is printed in
% the "Comment panel"
                 created=\DateForSamples,
                 modified=\DateForSamples,
% allright this one next sets the dates shown in the "Comment Panel",
% whereas the above two (or only modified) impacts the panel of
% annotations on the left in my (very old) Adobe Reader.  Not yet
% tested with evince
                 date=\DateForSamples
                 }%

\colorlet{etocsnippet}{blue}
\newcommand\marginattach{%
  \noindent Depending on the PDF viewer\normalmarginpar
% syntaxe pénible n'y-a-t-il pas un moyen plus commode
% j'hésite à tester \value{page}
  \marginpar
  [% left
   {\hfill
   \textattachfile[description={in section \the\value{section}}]%
                  {etocsnippet-\snippetno.tex}%
                  {\textcolor{etocsnippet}{etocsnippet-\snippetno.tex}}%
   }%
  ]%
  {% right
   \textattachfile[description={in section \the\value{section}}]%
                  {etocsnippet-\snippetno.tex}%
                  {\textcolor{etocsnippet}{etocsnippet-\snippetno.tex}}%
   \hfill
  }%
  \stepcounter{snippet},
  a click (or CTRL-click) on the filename in the margin may allow to extract
  it.  Or check if an ``attachments'' or ``comments'' panel is available.
}
% Sadly, on non-attachement supporting viewers such as Skim.app,
% the filename is not even searchable : entering "etocsnippet"
% in the PDF viewer search form does not find the margin texts.

% But I did not want to add to the filename the section number,
% or perhaps even the page number (which could have been perilous
% and I did not want to have to test and experiment, as I have
% done enough for today with these code snippets).

% In Acrobat the description field gives rise to some "tooltip"
% display on hover, which displays the description field.

\newcounter{snippet}%[section]
\stepcounter{snippet}
\makeatletter
\newcommand\snippetno{%
  \ifnum\value{snippet}<10 0\fi\the\value{snippet}%
%%%  emulating former manual mark-up (with reset at each section) but I drop this
%%%  \ifnum\value{snippet}>0 -\@Alph{\numexpr\value{snippet}+\@ne\relax}\fi
}
\makeatother

\usepackage{colorframed}% fix color issues with framed.sty (JFB 2022)
\colorlet{shadecolor}{gray!10}
\usepackage{centeredline}% custom macro now in public package
\usepackage{xinttools}% for easier construction of the doubly hyperlinked cs names

\usepackage{etoc}  % (loads multicol)
% There is clearly a bug of \singlespacing to do this \vskip\baselineskip.
% What then if one goes from double to onehalf spacing? no such adjustment
% in \onehalfspacing? Not coherent.  And caused me a lost of half an hour
% to first spot the problem (with "inline" TOCs first), then understand
% that it originated into the setspace.sty commands, then waste time
% canceling the hook locally and finally do this after going into checking
% setspace.sty.
\def\etocbeforetitlehook{\setstretch{1}}

% for etoc's own default line styles. <1.08b had \partname by default but this
% does not work well with babel+frenchb hence the default is now simply Part.
% Here we can use \partname as we do (did) the documentation for English or German.
% Careful with the customization of \partname done by scrdoc class! (obsolete remark)
\renewcommand{\etocpartname}{\partname}
% see the \AtBeginDocument with \addto\captionsngerman etc...

%--------
% 10 octobre 2013:
\AtBeginDocument{\addtocontents{toc}{\protect\hypersetup{hidelinks}}}

%--------
% add-ons for the new section `surprising uses of etoc' (2013/01/24)
% use of \the\value rather than \arabic due to paranoia in 2023.
\newcounter{visibletoc}
\renewcommand{\etocaftertitlehook}
   {\stepcounter{visibletoc}%
    \phantomsection
    \etoctoccontentsline{visibletoc}{\the\value{visibletoc}}}
\etocsetlevel{visibletoc}{6}
%--------
% Statistics on sections and subsections in a part \thispartstats:
% 2 mars 2013
% cette version utilise des box, plutôt que des macros.
% mais on ne peut plus alors changer de police etc...

% 11 octobre 2013, je retire les \color{teal}.

\newsavebox\firstnamei
\newsavebox\firstnumberi
\newsavebox\lastnamei
\newsavebox\lastnumberi
\newsavebox\firstnameii
\newsavebox\firstnumberii
\newsavebox\lastnameii
\newsavebox\lastnumberii
\newcounter{mycounti}
\newcounter{mycountii}

\newcommand*{\thispartstatsauxi}{}
\newcommand*{\thispartstatsauxii}{}
\newcommand*{\oldtocdepth}{}

\newcommand*{\thispartstats}{%
  \setcounter{mycounti}{0}%
  \setcounter{mycountii}{0}%
  \def\thispartstatsauxi{%
         \sbox{\firstnamei}{\footnotesize\etocname}%
         \sbox{\firstnumberi}{\footnotesize\etocnumber}%
         \def\thispartstatsauxi{}}%
  \def\thispartstatsauxii{%
         \sbox{\firstnameii}{\footnotesize\etocname}%
         \sbox{\firstnumberii}{\footnotesize\etocnumber}%
         \def\thispartstatsauxii{}}%
  \begingroup
  \etocsetstyle{subsection}
    {}
    {}
    {\thispartstatsauxii
     \stepcounter{mycountii}%
     \sbox{\lastnameii}{\footnotesize\etocname}%
     \sbox{\lastnumberii}{\footnotesize\etocnumber}}
    {}
  \etocsetstyle{section}
    {}
    {}
    {\thispartstatsauxi
     \stepcounter{mycounti}%
     \sbox{\lastnamei}{\footnotesize\etocname}%
     \sbox{\lastnumberi}{\footnotesize\etocnumber}}
    {{\footnotesize\itshape
      Here are some statistics for this part: it contains \arabic{mycounti}
      section\ifnum\value{mycounti}>1 s\fi{} and
      \ifnum\value{mycountii}>1 \arabic{mycountii} \else no \fi
      subsection\ifnum\value{mycountii}>1 s\fi. The name of
     the first section is 
     ``\unhbox\firstnamei{}'' and the corresponding number is 
     ``\unhbox\firstnumberi''. The name of the last section is 
     ``\unhbox\lastnamei{}'' and its number is
     ``\unhbox\lastnumberi''. 
     \ifnum\value{mycountii}>0 The name of
     the first subsection is 
     ``\unhbox\firstnameii{}'' and the corresponding number is 
     ``\unhbox\firstnumberii''. The name of the last subsection is 
     ``\unhbox\lastnameii{}'' and its number is
     ``\unhbox\lastnumberii''.\fi
     \par}}
  \etocinline 
% october 10, 2013. 
  \etocsetnexttocdepth {2}%
  \etocsettocstyle {\pdfbookmark[1]{Statistics}{\thepart.STATS}}{}
  \localtableofcontents
  \endgroup
}
%--------
% add-ons pour les TOC comme TikZ mind map, tree ou molécules
% hyperlinks to source code... added November 20, 2022
% works in sync with macrocode hacks explained after \StopEventually
% which were added in August 2022
% imported/adapted from code originally added to xint.dtx

% FINALLY, after many hesitations and great suffering with \marginpar
% I decide to simply divide the name into two parts and use two
% distinct hyperlinks, so as to not render the reading to painful.

% use a slightly different colour for second half?
% MEMO: we can change \ttfamily as hyperref uses a scope limiting group.
% Modified 2023/03/20 to devote the left two-thirds to linking to the user manual.
\makeatletter % for \on@line
\DeclareRobustCommand\csb[1]{%
    \edef\nbforuser{\the\numexpr2*\xintLength{#1}/3}%
    \ifcsname r@#1\endcsname
        \hyperref[#1]{\ttfamily\hyphenchar\font45 \char`\\ \xintKeepUnbraced{\nbforuser}{#1}}%
        \ifcsname r@etocmacro-#1\endcsname
          \hyperref[etocmacro-#1]{\ttfamily\hyphenchar\font45 \xintTrim{\nbforuser}{#1}}%
        \else
          % for .toc suffixed macros
          \ifcsname r@etocmacro-\xintTrimUnbraced{-4}{#1}\endcsname
            \hyperref[etocmacro-\xintTrimUnbraced{-4}{#1}]{\ttfamily\hyphenchar\font45 
                                                           \xintTrim{\nbforuser}{#1}}%
          \else
% 2023/02/27 also catch non existing destinations in source code
            {\fboxsep-\fboxrule\color{Orchid}%
              \fbox{\ttfamily\hyphenchar\font45 \xintTrim{\nbforuser}{#1}#1}%
             }%
            \ifcsname r@etocname\endcsname
              \expanded{\noexpand\AtEndDocument
                         {\noexpand\PackageError{etoc}{Pas de référence dans
                             le code à #1\on@line}%
                                                      {Corriger!}
                         }%
                       }%
            \fi
%            \hyperref[#1]{\ttfamily\hyphenchar\font45 \xintTrim{\nbforuser}{#1}}%
          \fi
        \fi
    \else
% 1.1a, updated 2023/01/22 1.2
          {\fboxsep-\fboxrule\color{Orchid}%
           \fbox{\ttfamily\hyphenchar\font45 \char`\\ #1}%
          }%
% make second run of compilation raise an error if macro name has been
% misspelled so target (in the documentation) does not exist ; but this will
% trigger error first time the documentation is added, one has to make
% one compilation after adding the label and before continuing doc edits
% 2023/01/22 1.2
          \ifcsname r@etocname\endcsname
            \expanded{\noexpand\AtEndDocument
                       {\noexpand\PackageError{etoc}{Pas de référence à #1\on@line}%
                                                    {Corriger!}
                       }%
                     }%
          \fi
    \fi
}
\makeatother

\DeclareRobustCommand\csa [1]
                {{\ttfamily\hyphenchar\font45 \char`\\ #1}}

\newcommand\cshyp[1]{\texorpdfstring{\csa{#1}}{\textbackslash #1}}

\newcommand\csbhyp[1]{\texorpdfstring{\csa{#1}}{\textbackslash #1}}

\newcommand\etoc{%
        \texorpdfstring{{\color{joli}\ttfamily\bfseries etoc}}{etoc}\xspace}
\newcommand\toc{\csb{tableofcontents}\xspace}
\newcommand\localtoc{\csb{localtableofcontents}\xspace}
\newcommand\invisiblelocaltoc{\csb{invisiblelocaltableofcontents}\xspace}
\newcommand\localtocwrdp{\csb{localtableofcontentswithrelativedepth}\xspace}

\newcommand\lowast{\raisebox{-.25\height}{*}}
\newcommand\starit[1]{\csa{#1\lowast}}
\newcommand\staritb[1]{\csb{#1}\lowast}

% 2023/01/23, mais pas la peine de s'embêter avec robust et texorpdfstring
\newcommand\etocrelease[1]{\hyperlink{v#1}{\texttt{#1}}}

\DeclareRobustCommand\ctanpkg[1]
      {\texorpdfstring{\href{https://ctan.org/pkg/#1}{#1}}{#1}}


\hyphenation{
table-of-con-tents
local-table-of-con-tents
local-table-of-con-tents-with-rel-a-tive-depth
etoc-local-list-of-ta-bles-hook
etoc-local-list-of-fig-ures-hook
local-list-of-fig-ures
local-list-of-ta-bles
%
toc-depth
sec-num-depth
con-tents-line
%
etoc-stan-dard-lines
etoc-de-fault-lines
etoc-toc-lines
etoc-set-style
etoc-name
etoc-page
etoc-skip-first-pre-fix
etoc-num-ber
etoc-if-first
etoc-x-if-first
etoc-if-num-bered
etoc-x-if-num-bered
etoc-if-was-empty
etoc-x-if-was-empty
etoc-checks-empti-ness
etoc-no-toc-if-no-toc
etoc-the-name
etoc-the-num-ber
etoc-the-page
etoc-link
etoc-the-linked-name
etoc-the-linked-num-ber
etoc-the-linked-page
etoc-the-link
etoc-set-level
etoc-set-toc-depth
etoc-set-next-toc-depth
etoc-set-toc-depth
etoc-obey-toc-toc-depth
etoc-ig-nore-toc-depth
etoc-depth-tag
etoc-set-tag-depth
etoc-obey-depth-tags
etoc-ig-nore-depth-tags
etoc-toc-con-tents-line
etoc-set-local-top
etoc-stan-dard-dis-playstyle
etoc-ar-ti-cle-style
etoc-book-style
etoc-set-toc-style
etoc-mul-ti-col-style
etoc-mul-ti-col
etoc-lo-cal-mul-ti-col
etoc-toc-style
etoc-toc-style-with-marks
etoc-toc-style-with-marks-nouc
etoc-ruled-style
etoc-ruled
etoc-lo-cal-ruled
etoc-framed-style
etoc-framed
etoc-lo-cal-framed
etoc-in-line
etoc-af-ter-ti-tle-hook
etoc-af-ter-con-tents-hook
etoc-af-ter-toc-hook
etoc-skip-first-pre-fix
etoc-only-on-first
% 
etoc-font-mi-nus-two 
etoc-font-mi-nus-one 
etoc-font-zero 
etoc-font-one 
etoc-font-two 
etoc-font-three 
etoc-sep-mi-nus-two 
etoc-sep-mi-nus-one 
etoc-sep-zero 
etoc-sep-one 
etoc-sep-two 
etoc-sep-three 
etoc-mi-nus-two-left-mar-gin 
etoc-mi-nus-two-right-mar-gin 
etoc-mi-nus-one-left-mar-gin 
etoc-mi-nus-one-right-mar-gin 
etoc-base-line-spread-mi-nus-two 
etoc-base-line-spread-mi-nus-one 
etoc-base-line-spread-zero 
etoc-base-line-spread-one 
etoc-base-line-spread-two 
etoc-base-line-spread-three 
etoc-toc-line-lead-ers 
etoc-ab-brev-page-name 
etoc-part-name 
etoc-book-name 
etoc-above-toc-skip 
etoc-be-low-toc-skip 
etoc-column-sep 
etoc-mul-ti-col-sep 
etoc-mul-ti-col-pre-tol-er-ance 
etoc-mul-ti-col-tol-er-ance 
etoc-de-fault-nb-col 
etoc-in-ner-top-sep 
etoc-top-rule 
etoc-top-rule-col-or-cmd 
etoc-in-ner-left-sep 
etoc-in-ner-right-sep 
etoc-in-ner-bot-tom-sep 
etoc-left-rule 
etoc-right-rule 
etoc-bot-tom-rule 
etoc-left-rule-col-or-cmd 
etoc-right-rule-col-or-cmd 
etoc-bot-tom-rule-col-or-cmd 
etoc-bkg-col-or-cmd 
etoc-framed-mp-hook
etoc-keep-orig-i-nal-table-of-con-tents
etoc-im-me-di-ate-set-toc-dep-th
etoc-im-me-di-ate-depth-tag
etoc-im-me-di-ate-toc-con-tents-line
etoc-im-me-di-ate-set-local-top
%
next-toc-with-tags
}

% no more \frenchspacing since 2022/08/26

% for illustration only. Not to be recommended in general.
\setcounter{secnumdepth}{4}

% Usage of microtype added for 1.2 release; now that for some time
% due to the business of attachfile I am tied with pdflatex.
\ifnum\Withdvipdfmx=1
\else
% should I check for xetex/luatex ?
\usepackage{microtype}
\fi

\def\etocoption#1{{\color{optioncolor}\bfseries\texttt{#1}}}

\begin{document}
\marginparsep 6bp
\thispagestyle{empty}

\bookmark[named=FirstPage,level=1]{Title page}
% depth tags for title page toc
\etocsettagdepth {preamble}    {part}
\etocsettagdepth {overview}    {section}
\etocsettagdepth {styling}     {section}
\etocsettagdepth {control}     {section}
\etocsettagdepth {examples}    {section}
\etocsettagdepth {advanced}    {section}
\etocsettagdepth {etocandworld}{part}
\etocsettagdepth {code}        {section}

% pour les TOC à la TikZ
\newtoks\treetok
\newtoks\parttok
\newtoks\sectiontok
\newtoks\subsectiontok
\newtoks\subsubsectiontok
\newtoks\tmptok

\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
  #1\expandafter\expandafter\expandafter{\expandafter\the\expandafter #1#2}}

% 12 et 13 mars 2015 pour la mind map de title page
% pour les Mindmap avec branch color
\def\appendpart #1#2#3{% 
   \edef\tmpstuff {\the#1 child [branch color = #3]{\the#2}}%
   #1\expandafter {\tmpstuff }%
}
% for 1.09f mind map on title page
\def\prependpart #1#2#3{% 
   \edef\tmpstuff {child [branch color = #3]{\the#2} \the#1}%
   #1\expandafter {\tmpstuff }%
}


% TOC MIND MAP ON TITLE PAGE
\newcount\tikznumberofcurrentgrandchild

% copied originally from http://tex.stackexchange.com/a/232914
%

% \newcount\tikzdeltaofcurrentgrandchild % not needed at 1.2

% 1.2 causes quite a few adjustments as the parts have been modified, there
% are now only 8 of them, and it is not same number of sections too.
% As I don't read TikZ well, I had some trouble, but I take this opportunity
% to clean up some complications from recent layouts which handled some
% sections to lie on circular arcs, as exception to the general rectangular
% rule.  This was because not everything could fit, but I could find
% satisfactorily layout this time, simply inhibiting via depth tags a few
% sections.

\def\tikzmycustomgrowth {%
    \pgftransformreset
    \ifnum\tikztreelevel=1
        \pgftransformrotate{(\pgfkeysvalueof{/tikz/sibling angle})
                             *
                             (\tikznumberofcurrentchild-2)}%
        \pgftransformxshift{\the\tikzleveldistance}%
    \fi
    \ifnum\tikztreelevel=2
        \pgfmathsetmacro\tikzoffsetofcurrentchild{%
          (\tikzsiblingdistance)*(\tikznumberofcurrentgrandchild)
        }%
        \ifdim\tikzoffsetofcurrentchild pt<\tikzlevelheight
            \pgftransformxshift{\tikzlevelwidth/2}
            \pgftransformyshift{-\tikzlevelheight/2+\tikzoffsetofcurrentchild}
        \else
        \pgfmathsetmacro\tikzoffsetofcurrentchild{\tikzoffsetofcurrentchild-\tikzlevelheight}%
        \ifdim\tikzoffsetofcurrentchild pt<\tikzlevelwidth
            \pgftransformxshift{\tikzlevelwidth/2-\tikzoffsetofcurrentchild}
            \pgftransformyshift{\tikzlevelheight/2}
        \else
        \pgfmathsetmacro\tikzoffsetofcurrentchild{\tikzoffsetofcurrentchild-\tikzlevelwidth}%
        \ifdim\tikzoffsetofcurrentchild pt<\tikzlevelheight
            \pgftransformxshift{-\tikzlevelwidth/2}
            \pgftransformyshift{\tikzlevelheight/2-\tikzoffsetofcurrentchild}
        \else
        \pgfmathsetmacro\tikzoffsetofcurrentchild{\tikzoffsetofcurrentchild-\tikzlevelheight}%
        \ifdim\tikzoffsetofcurrentchild pt<\tikzlevelwidth

            \pgftransformxshift{-\tikzlevelwidth/2+\tikzoffsetofcurrentchild}
            \pgftransformyshift{-\tikzlevelheight/2}
        \else
        \pgfmathsetmacro\tikzoffsetofcurrentchild{\tikzoffsetofcurrentchild-\tikzlevelwidth}%
            \pgftransformxshift{\tikzlevelwidth/2}
            \pgftransformyshift{-\tikzlevelheight/2+\tikzoffsetofcurrentchild}
        \fi\fi\fi\fi
        \pgftransformrotate {\pgfkeysvalueof{/tikz/sibling angle}
                             *
                             \tikznumberofcurrentgrandchild}%
      \global\advance\tikznumberofcurrentgrandchild by1
    \fi
}

% % % version circulaire utilisée avec les versions 1.08a--1.09e du manuel.
% \def\tikzmycustomgrowth {%
%   \pgftransformreset
%   \ifnum\tikztreelevel=1
%     \pgftransformrotate {126+(\pgfkeysvalueof{/tikz/sibling angle})*(\tikznumberofcurrentchild-1)}%
%   \fi
%   \ifnum\tikztreelevel=2
%     \pgftransformrotate {(\pgfkeysvalueof{/tikz/sibling angle})*(2+\tikznumberofcurrentgrandchild)}%
%     \global\advance\tikznumberofcurrentgrandchild by 1
%  \fi
%  \pgftransformxshift {\the\tikzleveldistance}%
% }

\newcounter{partco}
% 1,2,3,4,5,... -> 1,2,3,1,2,3,1,2,3
\def\pseudomodthree #1{\numexpr #1 + 3 - 3*((#1+1)/3)\relax}


\newbox\TitlePageMindmapTOC

\etocsetstyle{part}
  {\etocskipfirstprefix}
  {\ifcase\pseudomodthree{\value{partco}}%
   \or  \appendpart\treetok\parttok {Dandelion!50}%   first  (was teal!60 until 1.09f)
   \or  \appendpart\treetok\parttok {teal!40}% second (was yellow!80 until 1.2)
   \else\appendpart\treetok\parttok {green!40}%  third
   \fi
   }
  {\stepcounter{partco}%
   \edef\treenode{node
                  {\noexpand\textbf{\etocifnumbered{\unexpanded\expandafter{\etocthelinkednumber}.}{}
                   \unexpanded\expandafter{\etocthelinkedname}}}}%
   \parttok\expandafter{\treenode}}
  {% 1.09f used \prependpart for the last... reverted at 1.2,
   % better to append, avoids overlaps by rays of some balls
   \ifcase\pseudomodthree{\value{partco}}%
   \or  \appendpart\treetok\parttok {Dandelion!50}%   first
   \or  \appendpart\treetok\parttok {teal!40}% second
   \else\appendpart\treetok\parttok {green!40}%  third
   \fi
   }

\etocsetstyle{section}
  {}
  {}
  {% define the section node
     \edef\childnode{child {node
% The Bitter font does not have bold italic
% Adding \baselineskip setting, and \endgraf to activate because \par causes
% ! Paragraph ended before \tikz@collect@child@code was complete.
% There must be some way to configure the TikZ node but I don't have
% the time to go into its documentation.
       {\baselineskip10pt\noexpand\itshape%\noexpand\bfseries
        \unexpanded\expandafter{\etocthelinkedname}\hfil\break
         p. \unexpanded\expandafter{\etocthelinkedpage}\noexpand\endgraf
       }%
                           }%
                    }%
   \appendtotok\parttok\childnode 
   }
  {}

% title page toc
% 1.09f used a prepend for last part so we needed to delay
% the insertion of the root node to after the treetok had
% been finished.
% 1.2 uses append always so we can initialize here
\treetok{\node [root concept]{\normalfont{The \etoc package}\par {\normalsize\textsc
    {Jean-François Burnol}\par \ttfamily jfbu (at) free (dot) fr}\par
    {\normalsize 
     Package version:\par \hyperref[changelog]{\etocpkgversion{} (\etocpkgdate )}\par}}%
   }

\etocsettocstyle
  {\setcounter{partco}{0}}
  {\global\treetok\expandafter{\the\treetok;}}

\etocsetnexttocdepth{section}

% fill in the \treetok
\etocinline
\tableofcontents\label{toc:mindmaptitlepage}

% For debugging
% \newwrite\TOCasTree
% \immediate\openout\TOCasTree=\jobname.toctree
% \immediate\write\TOCasTree{\the\treetok}%
% \immediate\closeout\TOCasTree

\tikzset {branch color/.style={concept color=#1!white,
                               every child/.append style={concept color=#1!white!30!white,
                                                          opacity=0.3, text opacity=1},
                             },
          % ajout pour versions depuis 1.08g
          level width/.store in=\tikzlevelwidth,
          level height/.store in=\tikzlevelheight,
         }%
\global\setbox\TitlePageMindmapTOC\hbox {%
\resizebox{\dimexpr\paperwidth-1cm\relax}!{
\begin{tikzpicture}[mindmap,
                    text width=2cm,
                    align = flush center,
                    % pour 1.09 je reviens à version circulaire simplifiée
                    % pour 1.09f je reviens à version rectangulaire
                    growth function=\tikzmycustomgrowth,
                    nodes={concept},
% trying cyan I get some surprising brutal color change
% much more visible than with orange
                    concept color=yellow!50,% orange!60 until 1.2
                    % root concept/.append style={font=\huge, text width = 6cm},
                    root concept/.append style={font=\Large, text width = 5cm},
                    % level 1/.append style={level distance=7cm, sibling
                    level 1/.append style={level distance=6cm,
                                           sibling angle=360/8},% 8 parties
                    % level 1 concept/.append style={font=\Large, text width = 3cm},
                    % ancienne version circulaire
                    % level 2/.append style={level distance=12.5cm, sibling angle=360/39},% 
        % pour version rectangulaire, par tâtonnements:
        % réactivée pour 1.09f (étonnamment, juste quelques petits ajustements, mais ça
        % a tout de même pris pas mal de temps...)
        level 2/.append style={level width=21cm,
                               level height=30cm,
                               sibling distance=2.12cm,% à ajuster manuellement
                               % 1.09f pour essayer certaines parties en
                               % circulaire; plus besoin pout 1.2
                               % level distance=10cm,% distance depuis le centre !
                               % sibling angle=12,% à ajuster manuellement
                               },
        level 2 concept/.append style={text width=2cm},
                   ]
\the\treetok
\end{tikzpicture}%
}%
}% end of \hbox
% On l'envoie au shipout
\AddToShipoutPictureFG*{\put(.5\paperwidth,.5\paperheight)
                        {\makebox(0,0){\box\TitlePageMindmapTOC}}}
% trigger first page 
\noindent\null\par\vskip-5cm\hbox{\hypertarget{FRONTPAGE}{}}\vskip5cm

% % for standard TOC
% \etocstandardlines
% \etocclasstocstyle
% \tableofcontents

% reset toc global to class default and line styles to etoc default
\etocdefaultlines
\etocclasstocstyle

\clearpage
\etocdepthtag.toc {preamble}

%----
% MAIN TOC
% made invisible at 1.2
\invisibletableofcontents \label{toc:main}


\part*{\etoc}
\addcontentsline{toc}{part}{\etoc (read this first)}

\onehalfspacing

\begin{shaded}\small
  Since \etocrelease{1.08h} (2016/09/25), about 25 code samples
  (especially the longer ones) are incorporated into the PDF file (thanks to
  \textsc{Scott Pakin}'s \href{http://www.ctan.org/pkg/attachfile}{attachfile}
  package) as \textit{file attachement annotations}. Each file is represented
  by its filename in the margin after the verbatim rendering of the
  corresponding code.  Clicking on this filename will on supporting viewers
  trigger some dialog for extracting the file, or perhaps even will extract it
  automatically and open it in some text editor.  This is much better than
  copy-paste which often loses indentation.  In some PDF viewers side panels
  may provide a convenient clickable list of all these \textit{attachments
    annotations}.
  % https://helpx.adobe.com/acrobat/using/comments.html

  \medskip

  Since \etocrelease{1.09h} (2022/11/20), the command names throughout
  the user documentation which are displayed
  {\textcolor{RoyalBlue}{with this colour}} are doubly hyperlinked:
  their left parts hyperlink to the user documentation, their right
  parts hyperlink to the source code.  You can try it out now:
  \csb{localtableofcontents}.  But read this first: if you get lost
  inside the source code, clicking on control sequences displayed
  {\textcolor{macrocodelinktouserdoccolor}{with this colour}} brings
  you back to the part of the user manual discussing that specific
  command.  \ifnum\NoSourceCode=1 (but this PDF does not include the
    source code) \fi As of \etocrelease{1.2} (2023/03/01), the left
  \emph{two-third} of the command name hyperlinks to its user documentation,
  not only the left \emph{half}, as landing by accident in the midst
  of the source code is not recommended for the general public, so the
  dangerous area was made smaller.
\end{shaded}


\section*{Abstract}

%\renewcommand\abstractname{}

%\begin{abstract}
\begingroup
\leftskip1cm
\rightskip1cm

With \etoc loaded, \csb{tableofcontents} can be used multiple times and
an added command \csb{localtableofcontents} allows to typeset ``local''
tables of contents, i.e. having their scope limited to the last
sectioning command encountered.

No auxiliary file is used additionally to the standard \texttt{.toc}
file.  Release \etocrelease{1.2} provides experimental additions
\csb{locallistoffigures} and \csb{locallistoftables} which also use
only the \texttt{.toc} file.

Such local TOCs or ``Lists Of'' typically need to adopt a ``display
style'' (i.e. the way the title is rendered, whether it should add
itself an entry in the \texttt{.toc} file, ...) somewhat distinct from
the global TOC.  The release \etocrelease{1.2} default adapts
automatically the titles of local TOCs to their depths in the
sectioning hierarchy.  Should the need arise to customize such
``display style'', full control is allowed by package commands.

Regarding how the individual ``contents lines'' are handled, here again
complete control is given to the user to define from the ground-up how
to use the \emph{name}, \emph{number}, and \emph{page number} for each
entry, according to their ``levels'' (i.e. part, chapter, section,
subsection, ...).  As this requires some \LaTeX{} fluency, many examples
which can serve as starting points are attached to the PDF
documentation as extractible files.

Loading \etoc per itself modifies nothing to ``contents lines''
rendering from the class default or changes from other packages.  But
full usage of the package allows spectacular effects such as displaying
TOCs as trees or mind maps.

%\end{abstract}
\endgroup

\clearpage

\setstretch{1}

\section*{License}
\addcontentsline{toc}{section}{License}

\begingroup
\ttfamily
\hyphenchar\font -1
           \parindent0pt 
           \obeyspaces\obeylines %
\etocLicense\endgroup

\onehalfspacing
\clearpage
\onehalfspacing
\etocignoredepthtags
\etocsettocdepth {subsubsection}

\etocdepthtag.toc{overview}
\part{Overview}\label{part:overview}

\thispartstats

\etocdefaultlines
\etocsettocstyle{}{}
\localtableofcontents \label{toc:overview}

\section[\csbhyp{(local)\-tableofcontents}]{The \csbhyp{tableofcontents},
  \csbhyp{localtableofcontents} and other main package commands}

\begin{description}
\item [\csb{tableofcontents}] can be used arbitrarily many times in the
  document,

\item [\csb{localtableofcontents}] produces tables of contents which are
  limited in scope by the nearest preceding sectioning command,%
%
\footnote{After adding a \localtoc in-between existing ones, the first
  compilation will typeset at its location a pre-existing next one; only at
  second compilation will the contents match the location.  Hence often a
  third compilation is needed for document to stabilize.  And if the ``to toc''
  mechanism is active (see the discussion of \csb{etocsetup} option
  \etocoption{localtoctotoc} and
  similar options), only on second compilation is a new entry made in the
  \texttt{.toc} file so three compilations is always a minimum.  If one
  starts compilations from a given source, and no auxiliary files, the first
  compilation prepares the |.toc| file, the second typesets the main and local
  TOCs, possibly changing page numbers due to added contents, and only at the
  third compilation will things perhaps stabilize, and this third step is
  surely needed in case of \etocoption{localtoctotoc}. \ctanpkg{latexmk} is highly
  recommended.}


\item [\csb{etocsettocstyle}\marg{before\_toc}\marg{after\_toc}] defines
  (from the ground up, completely) the TOC titles, or more generally
  everything either before or after the actual TOC contents,

\item [\csb{etocsetstyle}\marg{levelname}%
  \marg{start}\marg{prefix}\marg{contents}\marg{finish}] defines (completely,
  from the ground up) arbitrarily the way the \csa{contentsline} entries in
  the |.toc| file are rendered, depending on their first argument, which is a
  `level name' such as |part|, |chapter|, |section|, |subsection|, \dots

  It is possible to create new levels or re-assign the numerical level of a
  named one via \csb{etocsetlevel}\marg{levelname}\marg{number}, thus opening
  the way for sophisticated (ab)-uses of the data stored in the |.toc| file.

\item [\csb{etocname}, \csb{etocnumber}, \csb{etocpage}] are free to use
  arbitrarily in the \csb{etocsetstyle} \marg{prefix} and \marg{contents}
  arguments for a given contents line level name, they stand for what will be
  extracted by \etoc from the actual data which is stored in the |.toc| file
  and is a bit entangled there (for the first two).
\end{description}

%% \vskip-\baselineskip\vskip0pt % sigh LaTeX spaces !

Throughout this documentation ``layout'', ``display'', ``TOC style'' always are
synonyms and refer roughly to how the TOC title is typeset.  And ``line
styles'' refer to how each individual entry in the TOC will be rendered
according to its ``level''.  Whenever ``TOC style'' is mentioned it is for the
title related things, else the documentation will say ``line styles''. 

\csb{etocsetstyle} is for line styles and it requires \LaTeX{} fluency.  It is
however absolutely not required to use it: by default \etoc does not intervene
at all into the rendering of the contents lines.  For example, one can use
packages such as \ctanpkg{tocloft} to customize these contents lines as wished.

\csb{etocsettocstyle} is for styling the titles (and all things related to
material before and after the actual TOC contents).  It was originally
conceived mainly for being used after the main document TOC (assuming it comes
first).  By default \etoc renders the main TOC as specified by the class it
knows about.  But for example in a |book|-class document, one does not want to
use a chapter-like heading for a local TOC in a section.  Hence the need for
\csb{etocsettocstyle}.  But if used in the preamble it will apply to the main
TOC too (if it comes first in the document body), hence its usage has to be
delayed or stored into some command, else one has to insert branches in the
original definition to query the kind of TOC it is applied to.

With \etocrelease{1.2} some utilities facilitate using
\csb{etocsettocstyle} only once in the preamble and branch according to
whether it is handling a main document TOC or a local one.  But the macro was
really initially conceived to be used for local TOCs once the main TOC was
typeset (commands are provided to restore the default configuration in time
for a main TOC at end of document).  There is no command to customize the
titles only for local TOCs from the preamble.

With \etocrelease{1.2} an effort has been made to make using
\csb{etocsettocstyle} for local TOCs purely an option: by default the package
adopts a style for local headings which takes into account the local top
level.  This corresponds to the command \csb{etocetoclocaltocstyle}, which is emitted
by default by the package.

Furthermore \etocrelease{1.2} detects \ctanpkg{tocbibind}%
%
\footnote{Support for \ctanpkg{tocloft} customization of contents lines was
  already in place for many years; the compatibility with \ctanpkg{tocbibind}
  was added only at \etocrelease{1.2} and required to update the
  \ctanpkg{tocloft} related code.}
%
and executes a compatilibity layer so that this package can be used with
hopefully the same result as in the main document classes.  Package options
\etocoption{maintoctotoc}, \etocoption{localtoctotoc},
\etocoption{localloftotoc} and \etocoption{locallottotoc} trigger ``to toc''
mechanisms even without \ctanpkg{tocbibind} if desired, directly at \etoc
level.  The starred variants of the table of contents and ``list of'' commands
will ignore the status of these options, as in the \ctanpkg{memoir} class.


\section[\csbhyp{locallistof\-(figures\textbar\-tables)}]{The \protect\etocrelease{1.2}
  \csbhyp{locallistoffigures} and \csbhyp{locallistoftables} commands}
\label{locallistoffigures}
\label{locallistoftables}
\label{etocsetup}

The major novelty with \etocrelease{1.2} is the addition of
\csb{locallistoffigures} and \csb{locallistoftables}.

Please read this:
\begin{itemize}
\item This is experimental code and the user interface as well as the
  output may change.
\item It is mandatory to load \etoc with option \etocoption{lof} for
  \csb{locallistoffigures} and \etocoption{lot} for \csb{locallistoftables}.
\item \etoc does not interfere whatsoever with \csa{listoffigures} and
  \csa{listoftables}, and can not customize them in any way.
\item \etoc still uses no additional auxiliary file, it uses only the
  |.toc| file.
\item This is experimental code and the user interface as well as the
  output may change.
\item The new command \csb{etocsetup} allows to configure at any
  location in the preamble or in the document body the boolean options
  \etocoption{maintoctotoc}, \etocoption{localtoctotoc},
  \etocoption{localloftotoc}, \etocoption{locallottotoc}, and
  \etocoption{ouroboros} which can also be issued as package options.
  The first four default to |false|, except with the \ctanpkg{memoir}
  class, in which case they are set to |true|, or when
  \ctanpkg{tocbibind} is detected, in which case they are set to
  |true| depending on the setting of the \ctanpkg{tocbibind} options.
\item The \etocoption{ouroboros} option defaults to |true|.  When set
  to |false|, local TOCs which have been added to the |.toc| file due
  to \etocoption{localtoctotoc} will \emph{not} list themselves (they
  will still list entries from local TOCs at deeper levels in their
  scope, and the ``lists of'' at their same level, and are listed in
  the main TOC, the only thing is that they don't show themselves in
  themselves).%
%
\footnote{It is complex to try to anticipate all scenarii, but in general, it
  is expected this behavior may cause the |.toc| file to need more time to
  stabilize when a new local TOC is added in the midst of a document having
  already a bunch of them.}
%
The default is that they \emph{do} list themselves, hence the name
\etocoption{ouroboros}.  It has no impact on the main TOCs, use their
starred variant to inhibit the self-display, but then why have issued
\etocoption{maintoctotoc} in the first place?
\item An effort has been made to facilitate as much as possible
  customization by the user, i.e. via commands without |@| letter.
  However this documentation will only list their names with very
  brief comments at the appropriate place and the reader is expected
  to check in the source code to understand better what they are for.
\item This is experimental code and the user interface as well as the
  output may change.
\item For example, the actual figure entries or table entries use by
  default the code from the main LOF or LOT; but one may prefer to
  render them in a way taking into account the local ``list of''
  scope: for example in a section, perhaps use the same style as
  subsections.  This is possible and is explained briefly later.
\item Although the default ``\etoc'' choices for local titles should
  be hopefully satisfactory in most cases, it is also possible to tell
  \etoc to try to use emulation from the document class via the
  command \csb{etocclasstocstyle}.  An effort has been made to obtain
  something which works at one level deeper than the ones under
  \csa{part}.  For example with \ctanpkg{KOMA-script}, we use the
  option |leveldown|.  However this will not really work for deeper
  local ``lists of''.%
%
\footnote{And with \ctanpkg{KOMA-script} at version \texttt{3.30} or later the
  fact that unnumbered sections reset the subsection counter will cause bad
  problems in a \texttt{scrbook} document if a TOC, local to a \csa{subsection}
  uses a title which is un unnumbered section!}
%
But for some document using local ``lists of'' only for chapters or
for sections in classes without chapters, this \csb{etocclasstocstyle}
may be appropriate as it may allow the user to use the class interface
for advanced control of the marks or other details.
\item The \etoc document class agnostic default, from
  \csb{etocetoclocaltocstyle} which is automatically issued at package
  loading time, is completely customizable.
\item This is experimental code and the user interface as well as the
  output may change.
\item If using for example all three of \csb{localtableofcontents},
  \csb{locallistoffigures} and \csb{locallistoftables}, in the same
  location after a division heading, and if the ``to toc'' related
  options either from \etoc or from \ctanpkg{tocbibind} are used, then
  \csb{localtableofcontents} must be the first one in order to be able
  to list the other two (and itself).  It can not see the ``lists of''
  coming before itself at the same division level.
\item Regarding the TOC title style, \etoc knows the standard classes,
  the \ctanpkg{KOMA-script} main classes and the \ctanpkg{memoir}
  class.  In an unknown class it will use the code from the |article|
  class emulation.  For the local TOCs and local ``lists of'' it uses
  as with the known classes its own class-independent code from
  \csb{etocetoclocaltocstyle}.
\item One can tell \etoc to not replace the original
  \csa{tableofcontents} via \csb{etockeeporiginaltableofcontents} (it
  will still be possible to use \csb{etoctableofcontents}), but the
  non-etoc \csa{tableofcontents} is usable only if document does not
  use \csb{locallistoffigures} or \csb{locallistoftables} as the
  latter two insert entries for figures, resp.\@ tables, in the main
  |.toc| file and only \etoc's \csb{tableofcontents} knows to ignore
  them.
\item This is experimental code and the user interface as well as the
  output may change.
\end{itemize}

\section{The \csbhyp{etocsettocstyle} command}
\label{etocsettocstyleintro}

This is a command with two mandatory arguments:
\centeredline{\csb{etocsettocstyle}\marg{before\_toc}\marg{after\_toc}}
The \marg{before\_toc} part is responsible for typesetting the
heading, for example it can be something like
\starit{section}|{\contentsname}|.  Here is an example of input:
\begin{verbatim}
\etocsettocstyle
   {\section*{Local table of contents}}%
   {}% don't do anything special after the toc contents
\end{verbatim}

Once issued it will have an impact on all next usages of \localtoc (or \toc)
until it is used again (or some related command).

Generally speaking the \marg{before\_toc} part should leave \TeX{} in
``vertical mode'': the line styles (either from the standard classes or the
package default ones) all expect to get started in `vertical mode'.

For more documentation of this and related commands see first
\autoref{sec:compatoverview} then 
\autoref{sec:tocstyle} for the more detailed pre-\etocrelease{1.2} documentation.

Only daring people will continue reading documentation as it now starts
telling how to truly activate \etoc power.

\section{The \csbhyp{etocsetstyle} command}
\label{etocsetstyleintro}

A distinction must be made between the \emph{line styles}, \emph{i.e.} the way
the name, number and page numbers (aka \etoc-provided \csb{etocname},
\csb{etocnumber}, and \csb{etocpage}) are used at each level, and the \emph{toc
  display style} (for lack of a better name) which tells how the title should
be set, whether an entry in the |.toc| file should be made, whether the
contents should be typeset with multiple columns, etc... the latter is governed
by the command \csb{etocsettocstyle} (and related commands) which has already
been mentioned, and the former by the command \csb{etocsetstyle} with is the
core of \etoc functionality.

It has five mandatory arguments.
%
\centeredline
{\csb{etocsetstyle}\color{blue}\marg{levelname}%
  \marg{start}\marg{prefix}\marg{contents}\marg{finish}}
%
The first one is the name of the sectional unit: a priori known names are
|book|, |part|, |chapter|, |section|, |subsection|, |subsubsection|,
|paragraph|, and |subparagraph|.  Any other name can be declared and
assigned to a (numeric) level via the \csb{etocsetlevel} command.%
%
\footnote{\etoc issues automatically
  \csb{etocsetlevel}\texttt{\string{appendix\string}\string{0\string}} (or wit
  h |1| if the document has no \csa{chapter} command), since
  \etocrelease{1.2}. Formerly this was done only with class
  \ctanpkg{memoir}.}

The four other arguments of \csb{etocsetstyle} specify: 1) \emph{what to do
  when this level is first encountered, down from a more general one,} then 2)
\& 3) (two arguments, a `prefix' and a `contents') \emph{how to use for this
  level the \csb{etocname}, \csb{etocnumber} and \csb{etocpage} parsed data,}
and 4) \emph{the last argument is the code to execute when a division unit of
  higher importance than the defined level style is encountered.}

Notice that this means that virtually \etoc manages a kind of tree-like
substratum which is abstracted from the `flat' structure of the |.toc| data.

You should now read \autoref{sec:linestyles} for the detailed documentation.

\section{No auxiliary file is used beyond the TOC file}
\label{sec:compatoverview}

An important characteristic of \etoc is that it is allows many different TOCs
in the same document, \emph{using only one} |.toc| \emph{file}!

\begingroup
\setcounter{mycounti}{0}%
  \etocinline
\etocsetlevel{part}{1}
\etocsetlevel{chapter}{1}
\etocsetlevel{visibletoc}{0}
\etocsetstyle{visibletoc}
    {}
    {\stepcounter{mycounti}}
    {}
    {}
\etocsettocstyle{}{}
\etocsetnexttocdepth{0}
\tableofcontents
The present documentation contains \arabic{mycounti} visible tables of
contents (and a few invisible ones) and uses only one |.toc| file!%
%
\footnote{and the counting itself has been achieved by a table of contents
  which was inserted in this paragraph! See \autoref{sec:tocoftocs}.}
\endgroup

However, each \localtoc or \toc command will trigger the execution of the
\emph{full contents} from the |.toc| file.  The effect of \localtoc as well as
the enforcement of the line styles as defined via \csb{etocsetstyle} are
achieved via suitable redefinition of the \csa{contentsline} \LaTeX{} macro.
But everything else present in the |.toc| file will be executed, as it is not
possible for \etoc to control in any way what is present in the |.toc|
file beyond \csa{contentsline} entries.

So one should think twice before adding manually extra commands to the |.toc|
file.  See \autoref{sec:addingtotoc} for further discussion.




\section{Compatibility mode}\label{subs:compat}
\label{etoctoclines}
\label{etocstandardlines}
\label{etocclasstocstyle}
\label{etocetoclocaltocstyle}
\label{etocusertocstyle}
\label{etoclocallistoffigureshook}
\label{etoclocallistoftableshook}

\etoc starts in a ``compatibility mode'', which means that it does not at all
interfere with how the commands from the |.toc| file get executed as long as
it has not been told explicitly to do so.%
%
\footnote{\label{fn:compat}for the ``toc display style'', by this we mean the
  aspects independant from the contents of the \texttt{.toc} file, \etoc checks
  if it knows the class, and then uses emulation code which was added manually
  to its source, and if not it defaults to the |article| class layout.  No
  automated way to recover the global toc display for arbitrary document
  classes is implemented. But \etoc will detect if \ctanpkg{tocloft} has
  customized the TOC title.}

This ``compatibility mode'' stops for matters of the ``toc display style'' as
soon as \csb{etocsettocstyle} is made use of, and for matters of the ``toc
line styles'' as soon as \csb{etocsetstyle} is used for \emph{any} level
(part, chapter, section, ...).  Levels not receiving explicit configurations
will use some pre-defined defaults which are in \etoc source code.

\begin{description}
\item[\csb{etocclasstocstyle}] sets the `main toc layout' to be as without
  |\usepackage{|\etoc\unskip|}|.  Local TOCs will also obey the document class
  style but with an attempt to use a heading one level down.  This tries to
  adapt to being in the top level below \csa{part} (i.e. in a \csa{chapter} or
  \csa{section}) but is not adapted to deeper local TOCs.

  At \etocrelease{1.2}, previously existing \csa{etocstandarddisplaystyle}
  was made into a deprecated synonym to this (the version from earlier
  releases made no attempt to adapt the style of the local TOCs to the level
  where it is located).

\item [\csb{etocetoclocaltocstyle}] (package default) Activates a heading
  style for local tables of contents (and ``lists of'') which tries to adapt
  automatically to the surrounding level.  It thus by-passes the configuration
  done by \csb{etocsettocstyle} which will then apply only to the main TOC.
  Using again \csb{etocsettocstyle} de-activates this behavior.

\item [\csb{etocusertocstyle}] means to obey the \csb{etocsettocstyle}
  configuration as previously in place, not only for the main TOC but also for
  local ones.  If \csb{etocsettocstyle} has never been used, this means that
  we return to the situation from \csb{etocclasstocstyle}.

\item [\csb{etocstandardlines}] (package default) Sets the `content lines' to be as without
  |\usepackage{|\etoc\unskip|}|.

\item [\csb{etoctoclines}] sets the `content lines' to match the last encountered
  \csb{etocsetstyle} specs.

\item [\csb{etocdefaultlines}] sets the `content lines' to use \etoc pre-defined
  ones.  The denomination is a bit confusing as `default' here means that
  these line styles are the ones defined by default, but not used by
  default\dots{} perhaps \csa{etocfallbacklines} would have been a better name.
\end{description}

Naturally \csb{etocsettocstyle} and \csb{etocsetstyle} can be used arbitrarily
many times in the document body (or already in the preamble but there one can
not typeset a TOC; however one can prepare commands which will be activated
later from inside the document body).  And they obey the scope-limiting effect
of \LaTeX{} environments.

For an illustration of using \etoc in compatibility mode see
\autoref{sec:testingcompat}.  And see \autoref{sec:anothercompat} for some
ways to let the line styles use the code from the document class but with some
custom changes.

During expansion  of \csb{locallistoffigures} or
\csb{locallistoftables}, the macros \csb{etoclocallistoffigureshook} resp.\@
\csb{etoclocallistoftableshook} are executed right before typesetting
the entries. (Click on ``hook'' in previous sentence for  advices on their usage).
\begin{verbatim}
\def\etoclocallistoffigureshook{\etocstandardlines}
\def\etoclocallistoftableshook {\etocstandardlines}
\end{verbatim}
Let's simply say here
that if you redefine them to do nothing, the lines will use the style as
appropriate for entries at numerical level one deeper than the ``local top'':
i.e. in a section they will be typeset as if being subsections.  If
you have both \csb{locallistoffigures} and a \localtoc, this may align
better vertically than the \LaTeX{} line style from the global ``Lists Of''.


Note that ``hook'' is used here in a very naive meaning of some macro which is
pre-located somewhere and that one can redefine to obtains various effects.

\section{A list of the commands added at \protect\etocrelease{1.2}}
\label{etocstoretocstyleinto}
\label{etocstorelinestylesinto}
\label{etocstorethislinestyleinto}
\label{etocifislocal}
\label{etocifislocaltoc}
\label{etocifislocallof}
\label{etocifislocallot}
%%\label{etocsettocstyle}
\label{etocifmaintoctotoc}
\label{etociflocaltoctotoc}
\label{etociflocalloftotoc}
\label{etociflocallottotoc}
\label{etocifisstarred}
\label{etoclevel}
\label{etocifunknownlevelTF}
\label{etocdivisionnameatlevel}
\label{etoclocalheadtotoc}
\label{etocglobalheadtotoc}
\label{etocetoclocaltocmaketitle}
%%\label{etocetoclocaltocstyle}
\label{localcontentsname}
\label{locallistfigurename}
\label{locallisttablename}
\label{etocetoclistoffiguresmaketitle}
\label{etocetoclistoftablesmaketitle}
\label{etocclasslocaltocmaketitle}
\label{etocclasslocallofmaketitle}
\label{etocclasslocallotmaketitle}
\label{etocclassmaintocaddtotoc}
\label{etocclasslocaltocaddtotoc}
\label{etocclasslocallofaddtotoc}
\label{etocclasslocallotaddtotoc}

\begin{shaded}\footnotesize
%\setstretch{1}
  One pre-existing command has been modified: \csa{etocstandarddisplaystyle}
  which is now deprecated and replaced by \csb{etocetoclocaltocstyle}.  The
  former behavior was to set also local TOCs to apply the style from the main
  TOC, which basically never works really well.  As explained already one can
  use \csb{etocclasstocstyle} to try to get for top local TOCs a suitable
  behavior, for example in the case of \ctanpkg{KOMA-script} classes, a
  behavior using their |leveldown| option.  But this will not be satisfactory
  for deeper local TOCs or ``lists of''.
\end{shaded}

With \csb{etocsettocstyle} one has complete decision about how the TOCs
typeset their titles.  Thus, this also means that supporting the options such
as \etocoption{localtoctotoc} is entirely up to the provided code.  There is
no real reason for the user to go into this but \etoc does provide
nevertheless generic utilities allowing to write very general styles,
supporting the options if so desired.  We now turn to their descriptions.  The
first few are accompanied with more details, but all hyperlink to their source
code via the right third of their names (some are defined in batches and
receive initial dummy definitions only to provide hyperlink targets).

\begin{description}
\item [\csb{etocstoretocstyleinto}\marg{control\_sequence}] This is a command
  with one mandatory argument which must be a control sequence such as
  \csa{foo}.  The macro \csa{foo} is then overwritten with no check if it
  exists already.  Its effect is to store inside \csa{foo} the data configured
  by the last \csb{etocsettocstyle}.  Then inserting \csa{foo} in the document
  will restore the saved toc style.%
%
\footnote{It is impossible to store the style used by  the
  \csb{etocetoclocaltocstyle} for local TOCs.  Only the one for main TOCs,
  which was configured by last usage of \csb{etocsettocstyle} is saved in
  \csa{foo}.  After \csa{foo} is executed, one needs to again issue
  \csb{etocetoclocaltocstyle} if one wants the latter to be active.}

\item [\csb{etocstorelinestylesinto}\marg{control\_sequence}] Same principle
  but now \csa{foo} will store the line styles for all levels.  And inserting
  \csa{foo} will have the same effect as re-doing all \csb{etocsetstyle} for
  all levels.

\item [\csb{etocstorethislinestyleinto}\marg{name or
    number}\marg{control\_sequence}] Same principle but now \csa{foo} will
  store the line style for the specified level, which can be numerical or a
  name.  And then executing \csa{foo} will have the same effect as re-doing the
  \csb{etocsetstyle} for this level.%
%
\footnote{Absolutely no error check is done on the first argument.  There is no
  interface for re-assigning the style to another level, although it would not
  be difficult to code it.  But the \etoc powers about re-assigning levels are
  things better left to unearthly entities such as the author.}

\DeleteShortVerb\|
 
\item [\csb{etocsetup}\marg{key[=true|false],...}] was already mentioned
  earlier.  Only usable with the five boolean options.  But everywhere in the
  document after the package loading.
\end{description}

\MakeShortVerb\|

Those next will be more briefly described.
\begin{itemize}
\item \csb{etocifislocal}, \csb{etocifislocaltoc}, \csb{etocifislocallof},
  \csb{etocifislocallot} can be used from inside the \csb{etocsettocstyle}
  first or second argument to select either one of the \marg{True} and \marg{False}
  branches.

\item   \csb{etocifmaintoctotoc}, \csb{etociflocaltoctotoc},
  \csb{etociflocalloftotoc}, \csb{etociflocallottotoc}, are conditionals
  matching the options and selecting one of the \marg{True} or \marg{False} branches.

\item \csb{etocifisstarred}\marg{True}\marg{False} says from inside the
  \csb{etocsettocstyle} arguments if the toc or `list of' command was in
  starred form.

  The \csb{etocetoclocaltocstyle} and \csb{etocclasstocstyle} have been configured so
  that when a |*| follows a \toc or \localtoc or local ``lists of'', its ``to
  toc'' behavior (if active from \ctanpkg{tocbibind} or \etoc own options) is
  canceled.  They use \csb{etocifisstarred} to this effect.

\item \csb{etoclocalheadtotoc}\marg{levelname}\marg{text} is a synonym for
  \centeredline{\csa{addcontentsline}|{toc}|\marg{@levelname}\marg{text}}
%
  Pay
  attention to automatically added |@| character.%
%
\footnote{Without this syntax, it would not be possible to have all three of
  \localtoc, \csb{locallistoffigures} and \csb{locallistoftables} one after
  the other following a given document heading, due to deep internals of the
  local TOC \etoc mechanism.  Notice that these internal details are
  susceptible to change with no advance notice and the actual implementation
  of \csb{etoclocalheadtotoc} may change.}


  Use this for example in the second argument of \csb{etoclocalmulticol}.%
%
\footnote{There is currently no analog of \csb{etoclocalmulticol} and similar
  commands which would be related to \csb{locallistoffigures} or
  \csb{locallistoftables} as \csb{etoclocalmulticol} is to \localtoc.}

\item \csb{etocglobalheadtotoc}\marg{levelname}\marg{text} is a synonym for
  \centeredline{\csa{addcontentsline}|{toc}|\marg{levelname}\marg{text}}
% 
  We
  have so many commands we can define another useless one\dots{} for aesthetic
  reasons of coherent names\dots{}

\item \csb{etoclevel}\marg{levelname} expands to a numeric quantity giving
  the level of a given string argument.  For example \csb{etoclevel}|{section}|
  will usually produce a \TeX{} number denotation of value one.  It must be
  prefixed by something such as the \TeX{} primitive \csa{number} to give an
  explicit digit with perhaps a minus sign, but can serve as is in \csa{ifnum}
  tests.

\item \csb{etocifunknownlevelTF}\marg{levelname}\marg{True}\marg{False} is a
  conditional to test if a level is known to \etoc.

\item \csb{etocdivisionnameatlevel}\marg{number} is an expandable construct
  which starts from a numerical level from |-2| to |5| and produces one of
  |book|, |part|, ..., up to |subparagraph|.

\item   \csb{etocetoclocaltocmaketitle} is the command used by
  \csb{etocetoclocaltocstyle} which typesets a local ``list of'' title using
  an un-numbered sectioning appropriate to its scope.  See the source code for
  how it looks.

\item  \csb{etocetoclistoffiguresmaketitle} and
  \csb{etocetoclistoftablesmaketitle} are similar, see the source code.

\item   \csb{localcontentsname}, \csb{locallistfigurename}, \csb{locallisttablename}
  are self-explanatory.

\item   \csb{etocclasslocaltocmaketitle}, \csb{etocclasslocallofmaketitle},
  \csb{etocclasslocallotmaketitle}, \csb{etocclassmaintocaddtotoc},
  \csb{etocclasslocaltocaddtotoc}, \csb{etocclasslocallofaddtotoc},
  \csb{etocclasslocallotaddtotoc}, well again see source code.


\end{itemize}

% {\footnotesize (clearing this page as next display must be on one page
%   only)\par}
% \clearpage

\section{A partial list of the package commands}

%\enlargethispage{2\baselineskip}

%\vskip-\baselineskip\vskip0pt




%\parshape 1 -1.5cm \dimexpr\linewidth+3cm\relax
%\begin{minipage}{\dimexpr\linewidth+3cm\relax}
\begin{multicols}{2}\parindent0pt\relax\setstretch{1}%
  \csb{etocbeforetitlehook}\par
  \csb{etocaftertitlehook}\par
  \csb{etocaftercontentshook}\par
  \csb{etocaftertochook}\par
  \csb{etocsettocstyle}\par
  \csb{etocclasstocstyle}\par
  \csb{etocetoclocaltocstyle}\par
  \csb{etocmulticol}\par
  \csb{etocframed}\par
  \csb{etocruled}\par
  \csb{etocsettocdepth}\par
  \csb{etocsettocdepth.toc}\par
  \csb{etocsetnexttocdepth}\par
  \csb{etocdepthtag.toc}\par
  \csb{etocsettagdepth}\par
  \csb{etocobeydepthtags}\par
  \csb{etocdefaultlines}\par
  \csb{etocstandardlines}\par
  \csb{etoctoclines}\par
  \csb{etocsetlevel}\par\columnbreak
\flushright
  \csb{etocsetstyle}\par
  \csb{etocskipfirstprefix}\par
  \csb{etocifnumbered}\par
  \csb{etociffirst}\par
  \csb{etoclink}\par
  \csb{etocthelink}\par
  \csb{etocname}\par
  \csb{etocnumber}\par
  \csb{etocpage}\par
  \csb{etocthename}\par
  \csb{etocthenumber}\par
  \csb{etocthepage}\par
  \csb{etocthelinkedname}\par
  \csb{etocthelinkednumber}\par
  \csb{etocthelinkedpage}\par
%  \csb{etocdisplay}\par
%  \csb{etocframedstyle}\par
%  \csb{etocignoredepthtags}\par
%  \csb{etocignoretoctocdepth}\par
%  \csb{etocimmediatedepthtag.toc}\par
%  \csb{etocimmediatesettocdepth.toc}\par
%  \csb{etocimmediatetoccontentsline}\par
%  \csb{etocinline}\par
%  \csb{etoclocalframed}\par
%  \csb{etoclocalmulticol}\par
%  \csb{etoclocalruled}\par
%  \csb{etocmulticolstyle}\par
%  \csb{etocobeytoctocdepth}\par
%  \csb{etocruledstyle}\par
%  \csb{etoctoccontentsline}\par
%\flushright
  \csb{localtableofcontents}\par
  \mbox{}\llap{\csb{localtableofcontentswithrelativedepth}}\par
  \csb{locallistoffigures}\par
  \csb{locallistoftables}\par
  \csb{tableofcontents}\par
%\vspace{5\baselineskip}\hrule height 0pt
\end{multicols}
%\end{minipage}\par


{\footnotesize\setstretch{1}
The above is not an exhaustive list of all the package user commands.
For example, it does not include most of those added at \etocrelease{1.2}
and which were listed in the previous section.\par
}

\clearpage


\etocdepthtag.toc {styling}
\part{The \etoc styling commands}
\label{part:styling}

\thispartstats

\etocsetstyle{section}
{\begin{enumerate}[leftmargin=.75cm, label=\etocifnumbered
      {{\fboxrule1pt\fcolorbox{green}{white}{\etocnumber}}}{}]}
{\normalsize\bfseries\rmfamily\item}
{\etocname{} (page \etocpage)}
{\end{enumerate}}

\etocsetstyle{subsection}
{\begin{enumerate}[leftmargin=0cm, label=\etocnumber]}
{\normalfont \item}
{\etocname{} (p.~\etocpage)}
{\end{enumerate}}

\etocsetstyle{subsubsection}
{\par\nobreak\begingroup\normalfont\footnotesize\itshape\etocskipfirstprefix}
{\allowbreak\,--\,}
{\etocname}
{.\hfil\par\endgroup\pagebreak[3]}

% 27 janvier 2013 22:30
% je définis les macros (non protégées) 
% \etocthename, \etocthenumber, \etocthepage

\etocruledstyle[1]{\etocfontminusone\color{green}%
     \fboxrule1pt\fboxsep1ex
     \framebox[\linewidth]
              {\normalcolor\hss Contents of \autoref{part:styling}\hss}}

\localtableofcontents \label{toc:part:styling}

The two main commands \csb{etocsettocstyle} and \csb{etocsetstyle} can be used
anywhere in the document.  Typically one will render the main global TOC in
one style and local tables of contents in another.  So the commands to style
the local tables of contents will be executed after the main \toc (if it is
first in document) either by direct injection in the document source, or
encapsulated in user commands defined in the preamble.

All commands obey the scope limiting effect induced by \LaTeX{} environments
or the core \TeX |\begingroup/\endgroup| (or braces |{...}|) constructs.

\section{The \csbhyp{etocsettocstyle} and related commands}
\label{sec:tocstyle}

\begingroup
\etocsettocstyle{}{}
\etocstandardlines
\DeclareTOCStyleEntry[numwidth=3em,indent=0em]{tocline}{subsection}
\DeclareTOCStyleEntry[numwidth=3.5em,indent=3em]{tocline}{subsubsection}
\localtableofcontents \label{toc:tocstyle}
\endgroup



\subsection{The \csbhyp{etocsettocstyle} command}
\label{etocsettocstyle}

The basics are explained in \autoref{etocsettocstyleintro}.  Recall that the
syntax is
\centeredline{\csb{etocsettocstyle}\marg{before\_toc}\marg{after\_toc}} and
here is a typical example of use:
\begin{verbatim}
\etocsettocstyle
   {\section*{Local table of contents}}%
   {}% don't do anything special after the toc contents
\end{verbatim}

The first argument to \csb{etocsettocstyle} can also contain instructions to
mark the page headings.  Or it could check to see if two-column mode is on,
and switch to one-column style, and the \meta{after\_toc} part would then
reenact the two-column mode.


The commands to be described next \csb{etocmulticolstyle},
\csb{etocruledstyle}, and \csb{etocframedstyle} all call \csb{etocsettocstyle}
as a lower-level routine, to initiate a \texttt{multi\-cols} environment in
\marg{before\_toc} and close it in \marg{after\_toc}.

\subsubsection{The \csbhyp{etocarticlestyle}, \csbhyp{etocbookstyle},
  and others commands}
\label{etocarticlestyle}
\label{etocarticlestylenomarks}
\label{etocbookstyle}
\label{etocbookstylenomarks}
\label{etocreportstyle}
\label{etocreportstylenomarks}

These are the commands used internally by \etoc in compatibility mode
depending on the document class. For example \csb{etocarticlestyle} instructs
\etoc to use |\section*{\contentsname}| (with marks on the page) and
\csb{etocbookstyle} says to use |\chapter*{\contentsname}|. It can prove
useful to issue \csb{etocarticlestyle} for a \csa{localtableofcontents} inside
a chapter, in |book| class and compatibility mode for the global TOC display
style.

Here is the current list:
\begin{itemize}[nosep]
\item \csb{etocarticlestyle}
\item \csb{etocarticlestylenomarks}
\item \csb{etocreportstyle}
\item \csb{etocreportstylenomarks}
\item \csb{etocbookstyle}
\item \csb{etocbookstylenomarks}
\item \csb{etocmemoirstyle}
\item \csb{etocscrartclstyle}
\item \csb{etocscrreprtstyle}
\item \csb{etocscrbookstyle}
\end{itemize}
The command \csb{etocclasstocstyle} will adapt to the document class.
One can not use the \ctanpkg{KOMA-script} related commands or the
\ctanpkg{memoir} one in standard classes.


\subsubsection{The \csbhyp{etocinline} and \csbhyp{etocdisplay} commands}
\label{etocinline}
\label{etocnopar}
\label{etocdisplay}

With \csb{etocinline}, or its synonym |\etocnopar|, the \localtoc command and
its variants do \emph{not} first issue a |\par| to close the previous
paragraph. Hence, the table of contents can be printed in an inline style; or,
if used only for preparing some token list or macro, it will leave nothing in
the token stream on execution.

Issue \csb{etocdisplay} to return to the default situation that \localtoc and
variants issue a |\par| to switch to vertical mode before typesetting the TOC
title and contents.

Here is an example of an \emph{inline} table of contents, which has only
subsections and uses the |itemize*| environment from \ctanpkg{enumitem} for
them.  The code used is
\begin{verbatim}
And the output is:
\begingroup
    \etocglobaldefs
    \etocsetstyle {subsection}
          {\begin{itemize*}[itemjoin={{; }}, itemjoin*={{, and }}]}
          {}
          {\item [{\bfseries\etocnumber.}] \etocname\ (\emph{p. \etocpage })}
          {\end{itemize*}.}%
    \etocsetnexttocdepth {subsection}%
    \etocsettocstyle {a clone of a local table of contents, originally defined in
                      \autoref{sec:tocstyle}, but here rendered completely
                      differently via an inline \ctanpkg{enumitem} list: }{}%
    \etocinline\tableofcontents \ref{toc:tocstyle}
\endgroup
\end{verbatim}

(observe that on executing the above there is no extra space after the colon
beyond what is intended, and the current paragraph is simply continued)
And the output is:
\begingroup
    \etocglobaldefs
    \etocsetstyle {subsection}
          {\begin{itemize*}[itemjoin={{; }}, itemjoin*={{, and }}]}
          {}
          {\item [{\bfseries\etocnumber.}] \etocname\ (\emph{p. \etocpage })}
          {\end{itemize*}.}%
    \etocsetnexttocdepth {subsection}%
    \etocsettocstyle {a clone of a local table of contents, originally defined in 
                      \autoref{sec:tocstyle}, but here rendered completely
                      differently via an inline \ctanpkg{enumitem} list: }{}%
    \etocinline\tableofcontents \ref{toc:tocstyle}
\endgroup

It was needed to use \csb{etocglobaldefs} because the \csa{item} command,
as modified by \ctanpkg{enumitem} closes a group, hence the meaning
of \csb{etocname}, \csb{etocnumber} and \csb{etocpage} would have been lost
after it.

A more impressive example of an inline table of contents (containing the full
contents of this document, which subsections rendered as page footnotes...) is
to be found in \autoref{sec:crazy}.

\subsection{The \csbhyp{etocmulticolstyle}, \csbhyp{etocmulticol},
  and \csbhyp{etoclocalmulticol} commands}
\label{etocmulticolstyle}
\label{etocmulticol}
\label{etoclocalmulticol}

This is a command with one optional and one mandatory argument:
\centeredline{\csb{etocmulticolstyle}\oarg{number\_of\_columns}\marg{heading}}
The
\meta{number\_of\_columns} can go from 1 to 10 (it defaults to 2; if its
value is 1, naturally no |multicols| environment is then created). The
\meta{heading} will typically be some `vertical' material like:
  \meta{heading} = |\section*|\marg{title}
but one may also have horizontal material like |\fbox{Hello World}| (\etoc
adds automatically a |\par| at the end of this ``heading'' argument to
\csb{etocmulticolstyle}). Here is an example:
\begin{verbatim}
\etocmulticolstyle{\noindent\bfseries\Large
                   \leaders\hrule height1pt\hfill
                   \MakeUppercase{Table of Contents}}
\localtableofcontents
\end{verbatim}
After \csb{etocmulticolstyle} all future \csa{tableofcontents} will use the
specified style until modified by renewed usage of \csb{etocsettocstyle} or variants.

A shortcut combining the style specification and the table of contents and not
impacting the styles of later TOCs is:%
%
\centeredline{\csb{etoclocalmulticol}\oarg{number\_of\_columns}\marg{heading}}
%
So the above example can be also obtained using:
\begin{verbatim}
\etoclocalmulticol{\noindent\bfseries\Large
                   \leaders\hrule height1pt\hfill
                   \MakeUppercase{Table of Contents}}
\end{verbatim}
%
It has the advantage that the TOC styling as specified applies only to this
sole local TOC.

And there is also
\csb{etocmulticol}\oarg{number\_of\_columns}\marg{heading} for global TOC.

\subsection{The \csbhyp{etoctocstyle} command}
\label{etoctocstyle}

\centeredline{\csb{etoctocstyle}\oarg{kind}\marg{number\_of\_columns}\marg{title}%
}
%
is the exact equivalent of doing
%
\centeredline{%
\csb{etocmulticolstyle}|[|{\itshape number\_of\_columns}|]|%
|{\kind*{|\itshape title\upshape|}}|}
%
where |kind| is one of |chapter|, |section|, . . . and defaults
to |chapter| or |section| depending on the document class.

As explained above one still has to issue \localtoc to typeset the TOC.  And
the styling, if not enclosed in a scope-limiting group or environment, applies
to subsequent local TOCs.

\subsubsection{The \csbhyp{etoctocstylewithmarks} command}
\label{etoctocstylewithmarks}
\label{etoctocstylewithmarksnouc}

\centeredline{\csb{etoctocstylewithmarks}\oarg{kind}%
              \marg{number\_of\_columns}\marg{title}\marg{mark}%
              }
%
is the exact equivalent of doing
%
\centeredline
{\csb{etocmulticolstyle}|[|{\itshape number\_of\_columns}|]|%
|{\kind*{|\itshape title \ttfamily\upshape\string\markboth%
|{\MakeUppercase{|{\rmfamily\itshape mark}|}}}}|}
%
where |kind| is one of |chapter|, |section|, ... The
actual display of the marks depends on the settings of the
page style.  There is variant \csb{etoctocstylewithmarksnouc}
which does not uppercase.

\paragraph{Do we really want paragraph entries in the TOC?}

\paragraph{really?}

\subsection{The \csbhyp{etocruledstyle}, \csbhyp{etocruled} and
  \csbhyp{etoclocalruled} commands}
\label{etocruledstyle}
\label{etocruled}
\label{etoclocalruled}

The general format of \csb{etocruledstyle} is:
%
\centeredline{\csb{etocruledstyle}%
              \oarg{number of columns}\marg{title of the toc}%
}%
\noindent 
The title is horizontal material (the |LR| mode of 
\emph{\LaTeX{}, a document preparation system}): if it
does not fit on one line it should be put in a \csa{parbox}  of
a given width.
The green frame for the heading of the table of contents at
the \hyperref[toc:part:styling]{the start of this part} was obtained with:
\begin{verbatim}
\etocruledstyle[1]{\etocfontminusone\color{green}%
     \fboxrule1pt\fboxsep1ex
     \framebox[\linewidth]
              {\normalcolor\hss Contents of this part\hss}}
\localtableofcontents
\end{verbatim}

As a shortcut to set the style with \csb{etocruledstyle} and then issue a
\localtoc, all inside a group so that future table of contents will not be
affected, there is:
%
\centeredline{\csb{etoclocalruled}\oarg{number\_of\_columns}\marg{title}}
%
And there is also \csb{etocruled} for the global TOC.

\subsection{The \csbhyp{etocframedstyle}, \csbhyp{etocframed}, and
  \csbhyp{etoclocalframed} commands}
\label{etocframedstyle}
\label{etocframed}
\label{etoclocalframed}

Same mechanism:
%
\centeredline{\csb{etocframedstyle}\oarg{number\_of\_columns}\marg{title}}
%
and the accompanying shortcut:
%
\centeredline{\csb{etoclocalframed}\oarg{number\_of\_columns}\marg{title}}
%
The
shortcut is used if one does not want to modify the style of the next
TOCs (the other way is to put the whole thing inside braces or a
|\begingroup...\endgroup|; there is also \csb{etocframed} for a
global table of contents).

The entire table of contents is framed.  The title itself is not framed:
if one wants a frame one should set it up inside the \meta{title}
argument to \csb{etocframedstyle} or \csb{etocframed}. The colors for
the background and for the components (top, left, right, bottom) of the
border are specified via suitable |\renewcommand|'s (see
\autoref{ssec:customdisplay}).

A |minipage| is used, hence the produced table of contents isn't compatible
with a page break. For allowing page breaks, use of the commands of
\ctanpkg{mdframed} or \ctanpkg{tcolorbox} in the arguments of
\csb{etocsettocstyle} is recommended.

Examples in this document are on pages \pageref{toc:d},
\pageref{toc:floating}, \pageref{toc:b}, and \pageref{toc:clone}.


\subsection{Customizing the pre-defined toc display styles}
\label{ssec:customdisplay}
\label{etocabovetocskip}
\label{etocbelowtocskip}
\label{etoccolumnsep}
\label{etocmulticolsep}
\label{etocmulticolpretolerance}
\label{etocmulticoltolerance}
\label{etocdefaultnbcol}
%\label{etocinnertopsep}% déjà défini
\label{etoctoprule}
\label{etoctoprulecolorcmd}
\label{etocinnerleftsep}
\label{etocinnerrightsep}
\label{etocinnerbottomsep}
\label{etocleftrule}
\label{etocrightrule}
\label{etocbottomrule}
\label{etocleftrulecolorcmd}
\label{etocrightrulecolorcmd}
\label{etocbottomrulecolorcmd}
\label{etocbkgcolorcmd}
\label{etocframedmphook}

We list the relevant macros, what they do should be legible from their
names. Note that dimensions are stored in macros so are modifed using
\csa{renewcommand}'s and not \csa{setlength}'s.  And color related commands
are not color definitions, they execute \csa{color}, and their effect gets canceled
by re-defining them to do \csa{relax} or \csa{empty}.
\begin{verbatim}
\newcommand*\etocabovetocskip{3.5ex plus 1ex minus .2ex} 
\newcommand*\etocbelowtocskip{3.5ex plus 1ex minus .2ex}

\newcommand*\etoccolumnsep{2em}
\newcommand*\etocmulticolsep{0ex}
\newcommand*\etocmulticolpretolerance{-1}
\newcommand*\etocmulticoltolerance{200}
\newcommand*\etocdefaultnbcol{2}
\newcommand*\etocinnertopsep{2ex}
\newcommand*\etoctoprule{\hrule}
\newcommand*\etoctoprulecolorcmd{\relax}

% for the framed style only:
\newcommand*\etocinnerleftsep{2em}
\newcommand*\etocinnerrightsep{2em}
\newcommand*\etocinnerbottomsep{3.5ex}

\newcommand*\etocleftrule{\vrule}
\newcommand*\etocrightrule{\vrule}
\newcommand*\etocbottomrule{\hrule}
\newcommand*\etocleftrulecolorcmd{\relax}
\newcommand*\etocrightrulecolorcmd{\relax}
\newcommand*\etocbottomrulecolorcmd{\relax}

\newcommand*\etocbkgcolorcmd{\relax}

% hooks
\newcommand\etocframedmphook{\relax}
\end{verbatim}

The \csa{etocframedmphook} is positioned immediately
after the beginning of a minipage environment where the
contents of the framed TOC are typeset. 

The \csa{...colorcmd} commands are initially set to expand to
\csa{relax} (hence do not require package |color| or |xcolor|
to be loaded). If one has modified a command such as
\csa{etocbkgcolorcmd} to expand to a color command and wants
to reset it to do nothing, one \emph{must} use
|\renewcommand{\etocbkgcolorcmd}{\relax}| and not
\csa{let}\csa{etocbkgcolorcmd}\csa{relax}.

Regarding the dimensions of the top rule they can be specified
in |ex|'s or |em|'s as in this example:
\centeredline{|\renewcommand{\etoctoprule}{\hrule height 1ex}|} 
The package code is done in such a manner
that it is the font size in instance at the end of typesetting
the title argument to \csb{etocruled} or
\csb{etocframed} which will be used for the meaning of the
`1ex'. Of course also the other rule commands can have their
dimensions in font relative units, but their values are
decided on the basis of the font in effect just before the
table of contents.

The top and bottom rules do not have to be rules and can be
horizontal \emph{leaders} (of a specified height) in the general
\TeX{} sense. However the left and right rules are not
used as (horizontal) leaders but as objects of a given specified
width. Note that \emph{only} the Plain \TeX{} syntax for rules is
accepted here. 


\subsection{Headings, titles, \csbhyp{etocoldpar}, \csbhyp{etocinnertopsep}}
\label{etocinnertopsep}
\label{etocoldpar}

For \csb{etocmulticolstyle} the mandatory \meta{heading} argument can be
either 
vertical mode material like |\section*{\emph{Table of Contents}}| or
horizontal mode material like in the simple |\etocmulticolstyle{Hello World}|.

No explicit |\par| or empty line can be inserted in the mandatory
argument of \csb{etocmulticolstyle}, but \etoc provides \csb{etocoldpar}
as a substitute: it does |\let\etocoldpar\par| before the |multicols|
environment and inserts this |\etocoldpar|\footnote{this command
  \csb{etocoldpar} (= working \csa{par} in the argument to
  \csb{etocmulticolstyle}) is not related to the switch \csb{etocinline}
  whose purpose is to tell \etoc not to do a \csa{par} before the table
  of contents.} at the end of the heading, then does a vertical skip of
value \csb{etocinnertopsep}. The command \csb{etocoldpar} can also be
used explicitely if needed in the mandatory argument to
\csb{etocmulticolstyle} (it is not allowed to insert an empty line
in this argument).

On the other hand the commands \csb{etocruledstyle} and
\csb{etocframedstyle} expect an argument ``in LR mode'' (to use the
terminology from \emph{LaTeX, a document preparation system}). This
means that multiline titles are only possible if enclosing
them inside something like a \csa{parbox}.

An important dimension used by all three of \csb{etocmulticolstyle},
\csb{etocruledstyle} and \csb{etocframedstyle} is
\csb{etocinnertopsep}. It gives the amount of separation
between the heading and the start of the contents. Its default
value is |2ex| and it is changed with
|\renewcommand*{\etocinnertopsep}|\marg{new\_value}, not with
|\setlength|. 


\section{Starred variants and hooks}
\label{tableofcontents*}
\label{localtableofcontents*}
\label{etocbeforetitlehook}
\label{etocaftertitlehook}
\label{etocaftercontentshook}
\label{etocaftertochook}

The \toc, \localtoc, \csb{etocmulticol}, and all their cousins have starred
variants (the star must be before the other arguments). The non-starred
variants execute the \csb{etocaftertitlehook}, whose default definition is to
do nothing. The starred variants do not execute this hook.

For example, imagine you are using |book| class and want \localtoc to use a
section-like title, but unnumbered. Assuming the main \toc comes first in the
document, you can insert this after it:
\begin{verbatim}
  \etocarticlestyle
  \renewcommand{\etocaftertitlehook}{\addcontentsline{toc}{section}{\contentsname}}
\end{verbatim}
This configures the way \localtoc will behave (or \toc) from now on in the
document.

The first line tells essentially to use |\section*{\contentsname}|, and the
second line says to insert the title in the |.toc| file itself (thus to be
displayed by the main table of contents). Notice that \ctanpkg{hyperref} package will
then automatically create suitable anchor and one should \emph{not} use
explicitly \cs{phantomsection} here (it would let the anchor be located below
not above the title).

% problème avec \xspace
With this set-up issuing \localtoc\unskip|*| will ignore the \csb{etocaftertitlehook}
hence not send the local toc title to the |.toc| file. This mimicks the
\ctanpkg{memoir} class behavior, and can also be used with it. For more on \ctanpkg{memoir}
class with \etoc, see \autoref{ssec:memoir}.

There are further hook macros:
\csb{etocaftercontentshook}, \csb{etocbeforetitlehook} and
\csb{etocaftertochook} which are initially defined to do nothing and can be
used for some special effects. They are executed whether or not the table of
contents command was starred.

For example, the present document executed
\begin{verbatim}
\renewcommand{\etocbeforetitlehook}{\setstretch{1}}
\end{verbatim}
as it is globally using the \ctanpkg{setspace} command \csa{onehalfspacing}.
Not using \csa{singlespacing} in the hook as it does a systematic vertical
skip of one baseline, which is unwanted in our usage.

\begin{framed}
  In recent years, the \LaTeX{} kernel has added a general ``hook'' mechanism
  with a user interface of the type |\AddToHook{...}{...}|.

  The \etoc macros with `hook' ending their names are much simpler things
  which are supposed to be manipulated only via \csa{renewcommand} or
  \csa{def} direct overwrites.

  In future, and to the extent the author has time for that addition, with its
  costly documentation updates collaterals, and thoughts about backward
  compatibility, \etoc should arguably tap into the general tools provided by
  recent \LaTeX{} kernels.
\end{framed}

\section{The \csbhyp{etocsetstyle} and related commands}
\label{sec:linestyles}
\label{etocsetstyle}
\label{etocname}
\label{etocpage}

\begingroup
\etocsettocstyle{}{}
\DeclareTOCStyleEntry[numwidth=3.2em,indent=0em]{tocline}{subsection}
\etocstandardlines
\localtableofcontents \label{toc:linestyles}
\endgroup

Let us explain how \etoc was used to produce the table of contents displayed
at the beginning of this \autoref{part:styling}.  This is a local table of
contents, and we used the command \localtoc.


The line styles were (essentially) obtained in the following manner:%
\footnote{the present document has {\ttfamily\string\renewcommand\string{%
      \string\familydefault\string}\string{\string\sfdefault\string}} in its
  preamble, hence \csa{normalfont} switches to the |sans| typeface; so in the
  section line-style, I wrote \csa{rmfamily} instead.}

\begingroup\small
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\etocsetstyle{section}
{\begin{enumerate}}
{\normalsize\bfseries\rmfamily\item}
{\etocname{} (page \etocpage)}
{\end{enumerate}}

\etocsetstyle{subsection}
{\begin{enumerate}}
{\normalfont\item}
{\etocname{} (p.~\etocpage)}
{\end{enumerate}}

\etocsetstyle{subsubsection}
{\par\nobreak\begingroup\normalfont
        \footnotesize\itshape\etocskipfirstprefix}
{\allowbreak\,--\,}
{\etocname}
{.\hfil\par\endgroup\pagebreak[3]}
\end{filecontentshere}
\endgroup
% Note 2023/02/22: pour une raison que je ne vais pas chercher à comprendre
% le etocsnippet-01 était mis du mauvais côté (dans la marge intérieure, pas
% extérieure) lorsque ce \marginattach était avant le \endgroup
\marginattach

These provisory style definitions rely on the automatic
numbering generated by the |enumerate| environments but it is
much better to use the further command \csb{etocnumber} inside
the item label, which gives the real thing. The improved
definitions will thus be explained later.

With this style, one would have 
to be imaginative to design something then for paragraph and
subparagraph entries! perhaps as superscripts? Well, usually
one does not need paragraphs and subparagraphs numbered and
listed in the TOC, so our putative user here chose a design
where no provision is made for them and added the definitive:
\begin{verbatim}
\etocsetstyle{paragraph}{}{}{}{}
\etocsetstyle{subparagraph}{}{}{}{}
\end{verbatim}
This is also the situation with the default package line styles!

Each \csb{etocsetstyle} command has five mandatory arguments:
%
\centeredline{\csb{etocsetstyle}\color{blue}\marg{levelname}\marg{start}\marg{prefix}\marg{contents}\marg{finish}}
%
The initially recognized \meta{levelname}'s are the sectioning
levels of the standard document classes: from \emph{part} (or
\emph{book} which is used by the \ctanpkg{memoir} class) down to
\emph{subparagraph}.

The \meta{start} code is executed when a toc entry of that level is
encountered and the previous one was at a higher level. The
\meta{finish} code is executed when one again encounters a higher
level toc entry. In the meantime all entries for that level are
typeset by executing first the \meta{prefix} code and then the
\meta{contents} code. 

The (robust) commands \csb{etocname}, \csb{etocnumber} and \csb{etocpage} are
provided for use inside the \meta{prefix} and \meta{contents} parts of the
\csb{etocsetstyle} specification. They represent of course, the name, number,
and page number of the corresponding toc entry. If package \ctanpkg{hyperref} is
active in the document and has added hyperlinks to the TOC data, then these
links are kept in the commands \csb{etocname}, \csb{etocnumber} and
\csb{etocpage} (this last one will have a link only if \ctanpkg{hyperref} was passed
either option \emph{linktoc=all} or option \emph{linktoc=page}.)%
%
\footnote{As expected, in case of \emph{linktoc=page}, only \csb{etocpage} is
an hyperlink, not \csb{etocname} nor \csb{etocnumber}.  See \csb{etoclink} on
how to create hyperlinks with the entry target.}
%
In accordance with the \ctanpkg{hyperref} native behavior, no
link gets incorporated into \csb{etocpage} if the page number is empty.

\subsection{The \csbhyp{etocskipfirstprefix} and \csbhyp{etociffirst} commands}
\label{etocskipfirstprefix}
\label{etociffirst}
\label{etocxiffirst}

The chosen |subsubsection| style made use of the command
\csb{etocskipfirstprefix}, which instructs \etoc to \emph{not} use
for the first item the specified \meta{prefix} code.


The command \csb{etociffirst}\marg{YES CODE}\marg{NO CODE}
is a more flexible way to customize the \meta{prefix}
(and \meta{contents}) specifications. It executes the \meta{YES
CODE} branch if this is the first unit at that level (inside a
lower level) and the \meta{NO CODE} if not. This is a robust
command which survives to expansion (for example in an |enumitem| label).

The variant \csb{etocxiffirst} does the same, but is expandable.


\subsection{The \csbhyp{etocnumber} command}
\label{etocnumber}

So far, our specifications would use the numbering generated
by the |enumerate| environments, but of course we generally want
the actual numbers as found in the |.toc| file. This is
available via the \csb{etocnumber} command. To get the labels
in the |enumerate| list to use it we can proceed with the
syntax {\ttfamily label=\char32} from the package |enumitem|:
\begin{verbatim}
\etocsetstyle{section}
{\begin{enumerate}[label=\etocnumber]}
{\normalsize\bfseries\rmfamily\item}
{\etocname{} (page \etocpage)}
{\end{enumerate}}
\end{verbatim}
Rather than just \csb{etocnumber} we then used something like
|\fbox{\etocnumber}|. Note that \csb{etocnumber} is a robust
command which explains why it can be used inside the label specification
without needing an added |\protect|.


\subsection{The \csbhyp{etocifnumbered} switch}
\label{etocifnumbered}
\label{etocxifnumbered}

The \csa{fbox} would give an unaesthetic result in the case of
an unnumbered section (which ended up in the table of
contents via an \csa{addcontentsline} command).\footnote{as
  seen we use \csa{fcolorbox} rather than \csa{fbox}. Due
  to some redefinition made by package |xcolor|, had we used
  \csa{fbox} (and not used \ctanpkg{hyperref}) we would have needed
  \csa{protect}\csa{fbox}.}

The \csb{etocifnumbered}\marg{A}\marg{B} command executes
\meta{A} if the number exists, and \meta{B} if not. So we use
it in the code which was finally chosen for the |section| level:
\begin{verbatim}
\etocsetstyle{section}
{\begin{enumerate}[leftmargin=.75cm, label=\etocifnumbered
      {{\fboxrule1pt\fcolorbox{green}{white}{\etocnumber}}}{}]}
{\normalsize\bfseries\rmfamily\item}
{\etocname{} (page \etocpage)}
{\end{enumerate}}

\etocsetstyle{subsection}
{\begin{enumerate}[leftmargin=0cm, label=\etocnumber]}
{\normalfont \item}
{\etocname{} (p.~\etocpage)}
{\end{enumerate}}
\end{verbatim}

If we had changed only the |section| level, and not the
|subsection| level, an error on compilation would have occurred
because the package style for subsections expects to start `in
vertical mode'. An additional \csa{par} token in the
\meta{contents} part of the |section| level would have fixed
this: |{...(page \etocpage)\par}|.

The command \csb{etocifnumbered} is robust;  \csb{etocxifnumbered}
has the same effect but is expandable.


\subsection{The \csbhyp{etocthename}, \csbhyp{etocthenumber}, and
\csbhyp{etocthepage} commands}
\label{etocthename}
\label{etocthenumber}
\label{etocthepage}

It is sometimes desirable to have access to the name, number and page
number without the hyperref link data: something similar to the starred
variant of the \csa{ref} command, when package \ctanpkg{hyperref} is used. For
example one may wish to use the unit or page number in some kind of
numeric context, or change its formatting. This is provided by
\csb{etocthename}, \csb{etocthenumber}, and \csb{etocthepage}.

These commands are not ``robust'', in fact it is expected they will be often
submitted to one expansion step so that their contents can easily be recovered
and stored perhaps for delayed usage.

\subsection{The \csbhyp{etoclink} command}
\label{etoclink}

The command \csb{etoclink}\marg{text} can be used in the line style
specifications in a manner analogous to \csb{etocname}, \csb{etocnumber} and
\csb{etocpage}.  It creates a link (if \ctanpkg{hyperref} is present%
%
\footnote{Prior to \etocrelease{1.1a}, no such link was added if the \texttt{.toc}
 file entry was encountered
 with  \ctanpkg{hyperref}'s option \texttt{linktoc} set to \texttt{none}.})
%
whose target is the corresponding document unit and
whose name is the given \meta{text} mandatory argument.

Hence |\etoclink{\etocthename}| is under default conditions of \ctanpkg{hyperref} like
the original \csb{etocname}, because the latter is already hyperlinked.  Under
\emph{linktoc=page} context |\etoclink{\etocthename}| adds the hyperlink which
is missing from \csb{etocname}.  Similarly under the default \ctanpkg{hyperref}
condition (i.e.\@ \emph{linktoc=section}) \csb{etocpage} is not an hyperlink, but one
can use |\etoclink{\etocthepage}|.

The command \csb{etoclink} is robust.

%  Since |etoc 1.08j| it contains the link
% destination in an already expanded form, so for example can be used even after
% a |&| in a tabular construction, if \csb{etocglobaldefs} was issued.




\makeatletter\scr@activate@xsection{1}\makeatother
% [] goes to head but {} to toc

% What would really be useful is an option for the length of {} to be measured
% and opt for [] only if does not fit on one header line
\subsection[The \csbhyp{etocthelinkedname} et al.\protect\@{} commands]
  {The \csbhyp{etocthelinkedname}, \csbhyp{etocthelinkednumber},
       \csbhyp{etocthelinkedpage} and \csbhyp{etocthelink} commands}
\label{etocthelinkedname}
\label{etocthelinkednumber}
\label{etocthelinkedpage}
\label{etocthelink}

\makeatletter\scr@activate@xsection{0}\makeatother

The meanings of these commands
can be stored for delayed usage. For example this is
done in the \hyperref[tocastree]{examples with trees}.

There has been a \textbf{breaking change} at \etocrelease{1.1a}.  Here is the behavior
\emph{prior} to this release:
\begin{itemize}[noitemsep]
\item \csb{etocthelinkedname} and \csb{etocthelinkednumber} were hyperlinks
  only if \ctanpkg{hyperref} was configured via |linktoc=all| or
  |linktoc=section| (the default),
\item \csb{etocthelinkedpage} was an hyperlink only if \ctanpkg{hyperref} was
  configured via |linktoc=all| or |linktoc=page| and the page number was not empty.
\end{itemize}
This behavior was coherent with the commands \csb{etocname}, \csb{etocnumber},
and \csb{etocpage} being the robust variants of \csb{etocthelinkedname},
\csb{etocthelinkednumber}, and \csb{etocthelinkedpage}.

At \etocrelease{1.1a} it was decided that the commands should match their denominations.%
%
\footnote{To tell the whole truth, the author in refactoring the code completely at \etocrelease{1.1a} was tricked by the names and forgot to read the old documentation so the new behavior was implemented and it was decided to keep the change.}
%
So they are now \emph{always} hyperlinks independently of |linktoc| \ctanpkg{hyperref}
option (\csb{etocthelinkedpage} has no hyperlink if the page number is empty,
to match \ctanpkg{hyperref} behavior):
\begin{itemize}[noitemsep]
\item \csb{etocthelinkedname} and \csb{etocthelinkednumber} and
  \csb{etocthelinkedpage} are always (in presence of \ctanpkg{hyperref})
  hyperlinks (for \csb{etocthelinkedpage} the page number must not be empty).
\end{itemize}


A further command is provided: \csb{etocthelink}, which wraps%
%
\footnote{Prior to \etocrelease{1.1a}, there was a link added only if \ctanpkg{hyperref} option \texttt{linktoc} was not \texttt{none}.}
%
an hyperlink around its argument: |\etocthelink|\marg{foo} hyperlinks an
arbitrary text \meta{foo} to the target sectioning unit in the document.
The command \csb{etoclink} is its robust variant.



\subsection{The \csbhyp{etocsetlevel} command}
\label{etocsetlevel}

One
can inform \etoc of a level to associate to a given sectioning
command with \csb{etocsetlevel}. For example:
\begin{verbatim}
\etocsetlevel{cell}{0}
\etocsetlevel{molecule}{1}
\etocsetlevel{atom}{2}
\etocsetlevel{nucleus}{3}
\end{verbatim}
In compatibility mode, it will be assumed that the commands |\l@cell|,
|\l@molecule|, ..., have been defined somewhere either by the user or a class:
doing only |\etocsetlevel| is not enough for the corresponding level to work
out-of-the-box in compatibility mode.

However, if no table of contents is typeset in compatibility mode, then all that
matters  is that the various line styles have been set. If, for example
|section| is at level |1|, then there is no need to do some
\csb{etocsetstyle}|{molecule}{..}{..}{..}{..}| after
\csb{etocsetlevel}|{molecule}{1}| if
\csb{etocsetstyle}|{section}{..}{..}{..}{..}| has already been done (and it has
been done by the package itself in its definition of its own line styles).
 
The accepted levels run from |-2| to |6| inclusive.  Anything else is
mapped to |6|, which is a dummy level, never displayed.  The package
does:
\begin{verbatim}
\etocsetlevel{book}{-2}
\etocsetlevel{part}{-1}
\etocsetlevel{chapter}{0}
\etocsetlevel{appendix}{0}% or 1 if document has no \chapter
\etocsetlevel{section}{1}
\etocsetlevel{subsection}{2}
\etocsetlevel{subsubsection}{3}
\etocsetlevel{paragraph}{4}
\etocsetlevel{subparagraph}{5}
\end{verbatim}
\etoc own custom styles are activated by \csb{etocdefaultlines}.

These level assignments can be modified at anytime.  See
\autoref{part:surprising} for various applications of this technique.



\subsection{Using \texttt{enumerate} or \texttt{itemize} environments for
  line styles}

The code for the line styles of the \localtoc of this part was already
reproduced in \autoref{sec:linestyles}.  It is very simple and uses
\texttt{enumerate} environments for sections and subsections, then an
``inline'' paragraph style for subsubsection titles.

Actually, the very first version of \etoc from 2012 was originally motivated
by the aim to do exactly this kind of things, which necessitates to be aware
of when for example after a series of subsections, a section line appears in
the |.toc| file.%
%
\footnote{At the source code level, the legacy method dating back to the
  origins in 2012 was replaced
  by a completely new one at release \etocrelease{1.2}.}
%
Indeed, this should trigger the emission of an |\end{enumerate}|.

With the \marg{start} and \marg{finish} arguments of \csb{etocsetstyle}, \etoc
provides an easy systematic interface to accomplish this kind of task.

But there are some limitations to the use of list environments for typesetting
TOCs.  One of them is intrinsic to the scope limitations created by the groups
associated to the environments: the |.toc| file may contain, besides the
information to be typeset in the TOCs, some other commands, such as language
changing commands from \ctanpkg{babel}, and some such commands do not expect
to see their scope limited in this way by the presence of an environment
(which will not be visible in the |.toc| file itself but enacted dynamically
by the user-specified line styles).

The built-in ``default line styles'' provided with \etoc (see
\autoref{sec:custom}) do not make use of environments.  Actually, in this
user manual, only the \hyperref[toc:part:styling]{table of contents} at the start of this
\autoref{part:styling}, the \autoref{toc:allsubsections} (which is a TOC!) and
examples from \autoref{etocthelink} have their line styles expressed in terms
of \texttt{enumerate} or \texttt{itemize} environments.

\subsection{The\csbhyp{etocglobaldefs} and \csbhyp{etoclocaldefs} commands}
\label{etocglobaldefs}
\label{etoclocaldefs}

In \LaTeX{} the meaning of a command defined via |\newcommand\foo{...}| inside
an environment (or group) vanishes from \TeX's memory on exit from this
environment (or group). At times however it is needed to make definitions with
global scope, for this \TeX{} has the primitive prefix |\global|.

By default \etoc's definitions of \csb{etocname} etc... are local. This causes
problems in certain contexts such as TOC as tables (\autoref{sec:tocastable},
\autoref{ssec:tocastableold}) and also with |enumitem| \emph{inline} variants
of its standard environments, because the command |\item| then closes a group
(see \autoref{etocthelink}).

After \csb{etocglobaldefs} has been issued, the \csb{etocname},
\csb{etocnumber} and \csb{etocpage} will be defined during execution of \toc
and \localtoc with global scope.  For normal use this is not necessary.  It
does not hurt either to activate it systematically.

To return to the default, which lets \etoc only define them locally to the
context in place where the \csa{contentsline} is encountered, execute
\csb{etoclocaldefs}.  Both \csb{etocglobaldefs} and \csb{etoclocaldefs} have
an effect only locally to the environment or group where they are used.

\section{The \etoc fall-back line styles}
\label{sec:custom}

\etocdefaultlines
\renewcommand{\etoctoprule}{\hrule height2pt depth0pt}
\renewcommand{\etoctoprulecolorcmd}{\color{red}}

\etocruledstyle{\normalfont\normalsize\rmfamily\fboxrule1pt\color{red}%
  \fbox{\parbox{.8\linewidth}{\centering\normalcolor This is a table of
      contents for the (few) subsections of this section. It carries the label |toc:c|}}} 

\localtableofcontents \label{toc:c}

\subsection{A demo of a TOC using \csbhyp{etocdefaultlines}}
\label{etocdefaultlines}

These line styles were written at an early stage in the
development of the package; although the next section explains how
to customize the font choicess or vertical spaces, etc\dots, used
by these line styles, most other changes would require copying
them from the sources and modify them directly. Admittedly they
have been written at a rather scary low-\TeX{} level, and will not
serve as a very friendly starting point. 

Activating their use is done via \csb{etocdefaultlines}, or
\csb{etoctoclines} if the line styles have not been modified with
\csb{etocsetstyle}. Sections and sub-sections are printed in
essentially the same manner, except that the leading for
sub-sections is a bit smaller (with document classes lacking a
\csa{chapter} command, the sections are printed in bold typeface;
this is the case in the present document). Sub-sub-sections are
printed inline, in one paragraph, with no numbers or page numbers.
This style was designed and tested with documents having lots of
sub-sub-sections, and should be used on a two-column layout: it
provides (only in that situation with many sub-sub-sections) a
more compact presentation than what is achieved by the \LaTeX{}
default.\footnote{and there will never be a Part or Chapter entry
  alone at the bottom of a column or page (except if it has no
  sub-unit).} On the other hand, used with a one-column layout,
and with few sub-sub-sections, the style is a bit more spread out
vertically than the \LaTeX{} default, sub-sections are not
visually much different from sections (especially for document
classes with a \csa{chapter} command), so the result is less
hierarchical in appearance than in the \LaTeX{} default.

Let us typeset the global table of contents of the present document as if it
had been done with a class having the \csa{chapter} command: we will print
sections as chapters, and subsections as sections. We use \csb{etocsetlevel}
for that, and also we need to change the font style of ``sections'' (which in
truth are our subsections) to use not the bold but the medium series; we
modify the \csb{etocfontone} command for that. Also we use dot leaders which
are less spread out than in the package default.


\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\etocruledstyle[2]{\normalfont\normalsize\rmfamily\itshape
  \fbox{\parbox{.6\linewidth}{
      \leftskip 0pt plus .5fil
      \rightskip 0pt plus -.5fil
      \parfillskip 0pt plus 1fil This is the global table of
      contents on two columns, using \etoc default line styles, but with
      sections as chapters, and subsections as sections.
      }}}
\etocdefaultlines
\etocsetnexttocdepth{1}
\begingroup
\etocsetlevel{section}{0}
\etocsetlevel{subsection}{1}
\renewcommand*{\etocfontone}{\normalfont \normalsize}
\renewcommand*{\etoctoclineleaders}
        {\hbox{\normalfont\normalsize\hbox to 1ex {\hss.\hss}}}
\sloppy
\tableofcontents
\endgroup
\end{filecontentshere}
\marginattach

\filecontentsexec\filecontentsheremacro

\subsection{Customizing  the \etoc pre-defined line styles}
\label{etocfontminustwo}
\label{etocfontminusone}
\label{etocfontzero}
\label{etocfontone}
\label{etocfonttwo}
\label{etocfontthree}
\label{etocsepminustwo}
\label{etocsepminusone}
\label{etocsepzero}
\label{etocsepone}
\label{etocseptwo}
\label{etocsepthree}
\label{etocminustwoleftmargin}
\label{etocminustworightmargin}
\label{etocminusoneleftmargin}
\label{etocminusonerightmargin}
\label{etocbaselinespreadminustwo}
\label{etocbaselinespreadminusone}
\label{etocbaselinespreadzero}
\label{etocbaselinespreadone}
\label{etocbaselinespreadtwo}
\label{etocbaselinespreadthree}
\label{etoctoclineleaders}
\label{etocabbrevpagename}
\label{etocpartname}
\label{etocbookname}


We will simply list the relevant commands as defined in the
package. Customizing them goes through suitable
\csa{renewcommand}s:
\begin{verbatim}
\newcommand*\etocfontminustwo{\normalfont \LARGE \bfseries}
\newcommand*\etocfontminusone{\normalfont \large \bfseries}
\newcommand*\etocfontzero{\normalfont \large \bfseries}
\newcommand*\etocfontone{\normalfont \normalsize \bfseries}
% (in classes with chapter, \etocfontone does not do \bfseries)
\newcommand*\etocfonttwo{\normalfont \normalsize}
\newcommand*\etocfontthree{\normalfont \footnotesize}

\newcommand*\etocsepminustwo{4ex plus .5ex minus .5ex}
\newcommand*\etocsepminusone{4ex plus .5ex minus .5ex}
\newcommand*\etocsepzero{2.5ex plus .4ex minus .4ex}
\newcommand*\etocsepone{1.5ex plus .3ex minus .3ex}
\newcommand*\etocseptwo{.5ex plus .1ex minus .1ex}
\newcommand*\etocsepthree{.25ex plus .05ex minus .05ex}

\newcommand*\etocminustwoleftmargin{1.5em plus 0.5fil}
\newcommand*\etocminustworightmargin{1.5em plus -0.5fil}
\newcommand*\etocminusoneleftmargin{1em}
\newcommand*\etocminusonerightmargin{1em}

\newcommand*\etocbaselinespreadminustwo{1}
\newcommand*\etocbaselinespreadminusone{1}
\newcommand*\etocbaselinespreadzero{1}
\newcommand*\etocbaselinespreadone{1}
\newcommand*\etocbaselinespreadtwo{1}
\newcommand*\etocbaselinespreadthree{.9}
\newcommand*\etoctoclineleaders
    {\hbox{\normalfont\normalsize\hbox to 2ex {\hss.\hss}}}
\newcommand*\etocabbrevpagename{p.~}  % initial of "page"
\newcommand*\etocpartname{Part}  % prior to 1.08b, was \partname
% but this didn't make sense e.g. with babel+frenchb whose \frenchpartname
% takes into account the value of the part counter.
\newcommand*\etocbookname{Book} % to be modified according to language
\end{verbatim}

No customizing of the standard line styles is possible from
within \etoc. As already explained, when
\csb{etocstandardlines} has been issued, the package just makes
itself very discrete and acts only at the global level, and
the TOC entries are (hopefully) formatted as would have
happened in the absence of \etoc.\footnote{with the
  \ctanpkg{KOMA-script} classes, we noticed that
  \csb{etocclasstocstyle} was apparently needed for the
  KOMA options |toc=left| to be active at the level of the line entries.}  


The \csb{etocstandardlines} compatibility mode will work also with
sectioning commands made known to \etoc via \csb{etocsetlevel},
under the condition of course that these sectioning commands
are accompanied with all the relevant definitions for
typesetting toc entries in the \LaTeX{} default manner
(existence of the macros \csa{l@something} . . .).

Using the command \csb{etocsetstyle}, be it in the preamble or
in the body of the document, has the secondary effect of
switching off the compatibility mode.

\section{Summary of the main styling commands}

\subsection{Setting up local styles}

\hbox{\color{green}\fboxrule1pt\fboxsep1em
\setbox0\hbox{\csb{etocthename}, \csb{etocthenumber}, \csb{etocthepage}, \csb{etoclink}\marg{linkname}}%
\framebox[\linewidth][c]
{\vbox{\hsize\wd0\normalcolor\noindent
\csb{etocsetstyle}\marg{levelname}%
  \marg{start}\marg{prefix}\marg{contents}\marg{finish}\\
\csb{etocname}, \csb{etocnumber}, \csb{etocpage},
\csb{etocifnumbered}\marg{A}\marg{B}\\
\csb{etocthename}, \csb{etocthenumber}, \csb{etocthepage}, \csb{etoclink}\marg{linkname}
}}}

\subsection{Setting up toc display styles}

\medskip
\hbox{\color{green}\fboxrule1pt\fboxsep1em
\setbox0\hbox{\csb{etoctocstylewithmarksnouc}\oarg{kind}%
\marg{number\_of\_columns}\marg{title}\marg{mark}}%
\framebox[\linewidth][c]
{\vbox{\hsize\wd0
\normalcolor\noindent
\csb{etocmulticolstyle}\oarg{number\_of\_columns}\marg{heading}\\
\csb{etoctocstyle}\oarg{kind}\marg{number\_of\_columns}\marg{title}\\
\csb{etoctocstylewithmarks}\oarg{kind}\marg{number\_of\_columns}%
\marg{title}\marg{mark}\\
\csb{etoctocstylewithmarksnouc}\oarg{kind}\marg{number\_of\_columns}%
\marg{title}\marg{mark}\\
\csb{etocruledstyle}\oarg{number\_of\_columns}\marg{title}\\
\csb{etocframedstyle}\oarg{number\_of\_columns}\marg{title}\\
\csb{etocsettocstyle}\marg{before\_toc}\marg{after\_toc}}}}

\subsection{Displaying tables of contents}


\medskip \hbox{\color{green}\fboxrule1pt\fboxsep1em
  \setbox0\hbox{\csb{etocname}, \csb{etocnumber},
    \csb{etocpage}, \csb{etocifnumbered}\marg{A}\marg{B}}%
  \framebox[\linewidth][c]
  {\vbox{\hsize\wd0\normalcolor\noindent
      \toc\\
      \localtoc\\
      \csb{etocmulticol}\oarg{number\_of\_columns}\marg{heading}\\
      \csb{etoclocalmulticol}\oarg{number\_of\_columns}\marg{heading}\\
      \csb{etocruled}\oarg{number\_of\_columns}\marg{title}\\
      \csb{etoclocalruled}\oarg{number\_of\_columns}\marg{title}\\
      \csb{etocframed}\oarg{number\_of\_columns}\marg{title}\\
      \csb{etoclocalframed}\oarg{number\_of\_columns}\marg{title}\\
      \hbox{}{\itshape\ttfamily\ \ \ \  and their starred variants}
   }}}

\subsection{Labels and references}
\label{ssec:labelref}

The commands (starred or not) to actually display the table of contents
can be followed with optional labels or references:\par

\medskip \hbox{\color{green}\fboxrule1pt\fboxsep1em
  \setbox0\hbox{\csb{etocname}, \csb{etocnumber},
    \csb{etocpage}, \csb{etocifnumbered}\marg{A}\marg{B}}%
  \framebox[\linewidth][c]
  {\vbox{\hsize\wd0\normalcolor\noindent
      \toc \csa{label}|\{toc:here\}|\\ 
      \toc \csa{ref}|\{toc:far\}| \\
      \toc \csa{label}|\{toc:here\}| \csa{ref}|\{toc:far\}| \\
      \localtoc \csa{label}|\{toc:here\}|\\ 
      \localtoc \csa{ref}|\{toc:far\}| \\
      \localtoc \csa{label}|\{toc:here\}| \csa{ref}|\{toc:far\}| \\
      \hbox{}{\itshape\ttfamily\ \ \ \ similarly with\ }%
      \csb{etocmulticol}{\itshape\ttfamily\ etc . . . }
   }}}


\medskip 

\localtoc \csa{ref}|{toc:far}| acts the same as \toc
\csa{ref}|{toc:far}|.
% <--- car à 1.2 cela permet d'éviter une page quasi vide...
When re-displaying another toc, only its contents are transferred:
both the line styles and the toc display style are the ones
currently defined, not the ones from the cloned toc.


\clearpage
\etocdepthtag.toc {control}
\part{Control of contents}
\label{part:control}

\thispartstats

\etocsettocstyle{}{}% maybe I should use \etocclasstocstyle here ?  
                    % but then I probably need some extra KOMA stuff to
                    % counteract  the setspace effet 
\begingroup
\DeclareTOCStyleEntry[numwidth=2em,indent=0pt]{tocline}{section}
\DeclareTOCStyleEntry[numwidth=2.5em,indent=2em]{tocline}{subsection}
\DeclareTOCStyleEntry[numwidth=3em,indent=4.5em]{tocline}{subsubsection}
\etocstandardlines
\localtableofcontents
\endgroup

\section[The \csbhyp{tableofcontents} et al. commands]{The
  \csbhyp{tableofcontents}, \csbhyp{localtableofcontents} and
  \csbhyp{localtableofcontentswithrelativedepths} commands}
\label{tableofcontents}
\label{etoctableofcontents}
\label{localtableofcontents}
\label{localtableofcontentswithrelativedepth}
\label{etockeeporiginaltableofcontents}

\begin{description}
\item[\toc] can be used arbitrarily many times in the document. Styling either
  globally the TOC or its individual entries is customizable at any time in
  the document.

  \csb{etoctableofcontents} is a synonym to \etoc's \toc.  The \toc command
  reverts to its non-\etoc definition if \csa{etockeeporiginaltableofcontents}
  is issued after loading the package.
%
\footnote{%
  This
  was added to fix a compatiblity issue with \ctanpkg{listings}'s
  \texttt{\string\lstlistoflistings}, as it needs the
  \texttt{\string\tableofcontents} macro to keep its original meaning.}

\item[\localtoc] will print local tables of
contents: \emph{i.e.} all sections and sub-units inside a
given chapter, or all subsubsections and lower inside a given
subsection, etc... (see also \csb{etocsetnexttocdepth}).%
%
\footnote{As is explained in \autoref{sec:labeling} the syntax allows to
  create somewhere a local table of contents and to display it at some other
  location either before or after its origin.}%
\textsuperscript{,}%
\footnote{As is explained in \autoref{sec:tocdepth} \etoc allows at anytime to
  locally redefine the numeric levels associated to named ones, which brings
  great flexibility to achieve special effects, all done using only a single
  auxiliary file, the standard |.toc| file.}
%
\item[\localtocwrdp\marg{number}]
%
\mbox{}\footnote{Thanks to Tony \textsc{Roberts} for feature request.}
% 
  can be used to override the document or
  current tocdepth setting (see \autoref{sec:tocdepth} for a discussion of
  tocdepth) to become relative to where the local TOC originates. For example,
  assuming the default numeric level assignments to standard sectioning units
\begin{verbatim}
\section{This is a section}
\localtableofcontentswithrelativedepth{+2}
\end{verbatim}
  will create a local table of contents taking into account the subsections
  and subsubsections inside this section, independently of what is the value
  of the |tocdepth| counter at this position in the document. If the numeric
  argument had been |3|, the local TOC would have displayed also paragraphs.
  If the section had been a chapter, and again for a relative tocdepth of |2|,
  the taken into account levels would have been sections and subsections.
\end{description}

\section{Labeling and reusing elsewhere}
\label{sec:labeling}

\etoc allows to typeset at some location a local table of contents which is
defined elsewhere.  For this, two simple steps:
\begin{enumerate}
\item insert \localtoc at the distant place, and follow it by some
  |\label{foo}|.
\item insert \toc|\ref{foo}| (or \localtoc|\ref{foo}|, it does the same) at the
  place where you want this distant table of contents to appear.
\item in step \textbf{1}, if you use \invisiblelocaltoc in place of \localtoc,
  there will be no typesetting at its place of definition.
\end{enumerate}
At the place of use of \toc|\ref{foo}|, the layout and looks is entirely
configurable locally.  It may be completely different from how the same
contents are rendered elsewhere by another \toc|\ref{foo}| or by the original
label-decorated \localtoc|\label{foo}|.  The current value of the |tocdepth|
counter is obeyed.

As an example the table of contents corresponding to \autoref{part:styling}
has been cloned here in a
\hyperref[toc:d]{float} which appears \vpageref{toc:d}.
\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begin{figure}[ht!]
  \centering
  \begingroup
  % this is a KOMA-script specific customization
  \DeclareTOCStyleEntry[numwidth=2em,indent=0pt]{tocline}{section}
  \DeclareTOCStyleEntry[numwidth=3.2em,indent=2em]{tocline}{subsection}
  \etocstandardlines % <-- use the defaults from the document class
  \renewcommand{\etocbkgcolorcmd}{\color{green!5}}
  \renewcommand{\etocbelowtocskip}{0pt\relax}
  \fboxsep1ex 
  \etocframedstyle [1]{\fbox{\makebox[.5\linewidth]{\etocfontminusone
        I am from \hyperref[toc:part:styling]{far away}}}}
  \etocsetnexttocdepth{subsection}
  \tableofcontents \label{toc:d} \ref{toc:part:styling}
  \endgroup
\end{figure}
\end{filecontentsdef}
\filecontentsexec\foo
We used this: \filecontentsprintviascan\foo
\marginattach

In the above example, not only did we use |\ref{toc:part:styling}| to print
here the distant (local) table of contents which has been labeled |toc:part:styling| but
we added a (possibly confusing) |\label{toc:d}|.  This is done for the
down-to-earth reason of being able to use, as we did in the previous
paragraph, |\vpageref{toc:d}|.  But if one wants to clone again the original
local table of contents, one must reference its original label:
\toc|\ref{toc:part:styling}|.%
%
\footnote{Why does this author always give
complicated examples rather than down-to-earth ones?}
%
This original local table of contents is to be found \vpageref{toc:part:styling}.

\section[\csbhyp{etocsetlevel}]{A powerful functionality of \etoc: the
  re-assignment of levels with \csbhyp{etocsetlevel}}
\label{sec:tocdepth}

The intrinsic levels manipulated by \etoc are numeric: from
|-2| (which corresponds to |book| in the \ctanpkg{memoir} class)
down (from the big to the small)
to |5| (|subparagraph|). But the assignment of a numeric level
to a given name can be modified at any time with the command
\csb{etocsetlevel}\marg{level\_name}\marg{number}. In conjunction
with the use of the \LaTeX{} |tocdepth| counter, this has
powerful applications: \meta{level\_name} does not have to
coincide with an actual document sectioning command, and \etoc
can be used to print arbitrary ``lists of things'', using no
other auxiliary file than the |.toc| file. This is
explained further in \autoref{part:surprising}.

\begin{framed}
  It is often said that in the standard classes, the sectioning
  level of |\part| is |0| in the classes not having a |\chapter|
  command, and |-1| in classes having a |\chapter| command. This
  is \emph{correct} for what regards the \emph{automatic
    numbering}, as is governed by the value of the |secnumdepth|
  counter; but it is \emph{wrong} for what regards the effect of
  the |tocdepth| counter: setting the |tocdepth| to |-1| in the
  |article| class just before |\tableofcontents| does \emph{not}
  prevent Parts from appearing in the Table of Contents. One has
  to set it to |-2| for that, whether in the |article| or in the
  |book| class.

  The canonical levels, a priori known to \etoc, are those of
  relevance to the \textbf{|tocdepth|} counter in the standard
  classes and are recapitulated in this table: \centeredline{
    \fbox{\begin{tabular}{rc}
        (\ctanpkg{memoir} class) book&-2\\ part&-1\\ chapter&0 \\
        section&1\\ subsection&2 \\
        subsubsection&3 \\ paragraph&4 \\ subparagraph& 5
    \end{tabular}}}

\smallskip With \etoc, the user can easily print a local table of
contents inside a given subsection, where subsubsections will be
printed in the style of sections, paragraphs in the style of
subsections, and subparagraphs in the style of subsubsections, if
so desired. One can also decide to set everything to be at the level
|6| (never displayed by \etoc), except for example
paragraphs, promoted to be at level |1|, and then one obtains a nice
table of contents of all the paragraphs from the document! 
(|tocdepth| at least |1|)\footnotemark
\end{framed}

\footnotetext{and one should naturally not print this TOC of paragraphs in
  compatibility mode, which would insist on inserting a gigantic left
  margin.}

\section{The \csbhyp{etocsettocdepth} and \csbhyp{etocsetnexttocdepth} commands}
\label{etocsettocdepth}
\label{etocsetnexttocdepth}
\label{invisibletableofcontents}

The |tocdepth| counter has no bearing on what gets written to the |.toc| file;
its action is only on the actual typesetting of the table of
contents.\footnote{In the standard classes (at least), it also influences the
  \csa{listoftables} and \csa{listoffigures}, via \csa{@dottedtocline}.} In the
standard classes there is only one |\tableofcontents| possible, whereas with
\etoc, arbitrarily many are allowed, so one may change |tocdepth| to the
appropriate value (which decides the finest sectioning level displayed) again
and again each time a table of contents needs to be typeset.

\etoc provides \csb {etocsettocdepth}\marg{level} whose mandatory argument is
either 
numeric (from |-3| to |5|) or a division name such as |subsection| or
|subsubsection| or any name previously declared to \etoc with
\csb{etocsetlevel} (the keywords |all| and |none| are recognized, although not
corresponding to a document division). 
This does the appropriate |\setcounter{tocdepth}{numeric_level}|.

As is explained in the next subsection, |tocdepth| is used by \ctanpkg{hyperref}, and
one must take steps to prevent its changes from influencing the bookmarks, too.
So, \etoc has \csb {etocsetnexttocdepth}\marg{level} whose influence ceases
immediately after the next table of contents.  The package defines
\csb{invisibletableofcontents}
essentially as
\centeredline{\csb{etocsetnexttocdepth}|{none}|\csb{tableofcontents}}

The simplest organization is probably to have after |\begin{document}| and before the
  first |\tableofcontents| a single instance of the \csb{etocsettocdepth}
  command, with argument the deepest level (or most commonly used deepest level)
  among the tables of contents of the document, and to use locally,
  where needed, \csb{etocsetnexttocdepth} before |\tableofcontents| or
  |\localtableofcontents|.

\begin{framed}
  It is possible to use \csb{etocsettocdepth} inside the first argument of
  \csb{etocsettocstyle} (possibly in conjunction with checking the
  \csb{etoclocaltop} value, \emph{which however will be up-to-date there only if
  \csb{etocchecksemptiness} was executed}). There is no worry then about
  possible impact on hyperref bookmarks later on, because \etoc always resets
  the |tocdepth| counter after typesetting a TOC to the value it had before
  it.

  % Since \etocrelease{1.09}
  The macro \csb{etocsetnexttocdepth} works also if located in
  first argument of \csb{etocsettocstyle}, but there is no reason to use it
  there as \csb{etocsettocdepth} has no durable effet on the |tocdepth|
  counter if executed there.

  Check \csb{localtableofcontentswithrelativedepth} for a simpler way to
  control the depth of local tables of contents. This has the advantage of
  working reliably whether or not the \csb{etocchecksemptiness} is used.
\end{framed}

\subsection{The hyperref option \emph{bookmarksdepth}}
\label{ssec:bookmarksdepth}

When modifying the counter |tocdepth| for the purposes of
multiple uses of \toc or \localtoc, one should be aware that
package \ctanpkg{hyperref} by default takes into account the
\emph{current} value of the |tocdepth| counter to decide
whether the |pdf| file will contain a bookmark corresponding
to sectioning commands encountered in the source file. Thus,
one typically needs to reset |tocdepth| to its previous
value after having temporarily modified it for a given table of
contents.

Or, there is the \emph{bookmarksdepth=n} option of package
\ctanpkg{hyperref}, with \emph{n} the desired document bookmarks
maximal depth, which can be numeric or the name of a level known to
\ctanpkg{hyperref}. This documentation previously passed |bookmarksdepth=3| as
option to \ctanpkg{hyperref}, so even if |tocdepth| was left to |1|
by inadvertance after printing a certain table of contents 
this did not modify the bookmark tree of the |pdf| file. Now that
\csb{etocsetnexttocdepth} has been added to the package, we have used it
systematically and there was no need for  |bookmarksdepth=3| anymore.

\section[The \csbhyp{etocsettocdepth.toc} command]{The
  \csbhyp{etocsettocdepth.toc} and
  \csbhyp{etocimmediatesettocdepth.toc} and commands}
\label{etocsettocdepth.toc}
\label{etocimmediatesettocdepth.toc}

This command \csb{etocsettocdepth.toc} implements some functionality of
\ctanpkg{tocvsec2}%
%
\footnote{I thank Denis \textsc{Bitouzé} for drawing
  my attention to the incompatibility of this package with \etoc.},
%
a package
which however was incompatible with \etoc (it can still be used for its
|secnumdepth|-related commands, but its |toc|-related activities will get
canceled by \etoc) and more-or-less designed for a single table of contents.

The action of \csb{etocsettocdepth.toc} is totally different than the one of
\csb{etocsettocdepth}. Rather than modifying the |tocdepth| counter immediately,
it adds a line to the |.toc| file which, when executed inside a table of
contents will enact this change. 

The command \csb{etocsettocdepth.toc}, like
\csb{etocsettocdepth}, accepts both numeric and named
arguments. In the case of a named argument, the actual numeric
value to be used is not yet decided at the time the |.toc|
file is created; it will be the value currently specified for
the named level at the time each table of contents (not having
done |\etocignoretoctocdepth|) is typeset. 

The |tocdepth| counter will never be set to a value finer than its initial value
at the start of the table of contents: so adding commands
\csb{etocsettocdepth.toc} in the document is a way to \emph{restrict} locally
the depth of the table of contents. For example to prevent inclusion in the
tables of contents of the sub-sub-sections of a given chapter.

This
{\fbox{gets executed in ALL tables of contents.}}

Also \csb{etocimmediatesettocdepth.toc} is provided.  For explanations,
refer to the discussion of \csb{etocimmediatedepthtag.toc} in the
next section.

\subsection{The \csbhyp{etocobeytoctocdepth} and
  \csbhyp{etocignoretoctocdepth} commands}
\label{etocobeytoctocdepth}
\label{etocignoretoctocdepth}


So \csb{etocignoretoctocdepth} is provided to cancel the
\csb{etocsettocdepth.toc} mechanism when
needed; and \csb{etocobeytoctocdepth} will
re-activate it. The package does initially \csb{etocobeytoctocdepth}.

\section[The \csbhyp{etocdepthtag.toc} and \csbhyp{etocsettagdepth} commands]{The
  \csbhyp{etocdepthtag.toc}, \csbhyp{etocimmediatedepthtag.toc} and
  \csbhyp{etocsettagdepth} commands}
\label{etocdepthtag.toc}
\label{etocimmediatedepthtag.toc}
\label{etocsettagdepth}



% Release \etocrelease{1.07h} has a 
The command \csb{etocdepthtag.toc}
allows to control dynamically the which contents end up included in the
displayed TOCs (this documentation also decribed formerly a way
using \csb{etocsettocdepth.toc} with some dummy level name, which got
then set via \csb{etocsetlevel} according to what was locally needed,
but it was too hacky and I am not sure if it was understandable).

It is used as \csb{etocdepthtag.toc}\marg{tag\_name}, where the
\meta{tag\_name} is anything, and this will put the tag in the |.toc|
file. When typesetting a TOC, one issues a series of commands
\csb{etocsettagdepth}\marg{tag\_name}\marg{level} where the
\meta{level} may be either numeric (from |-3| to |5|) or the name of a
division unit known to \etoc, or |none| or |all|. The effect of the tag
inside the |.toc| file will then be to set the |tocdepth| counter to
the desired value, in real time (this can not get finer than the
initial value of |tocdepth| at the start of the TOC).

The added flexibility is thus that \csb{etocsetlevel} has not been used in a
kind of hacky way, that one may use named level depths, and the
keywords |none| and |all|.

As usual, once the tag depths have been set, they remain in effect until getting
redefined or seeing their scope expire via the closing of a group or of a
surrounding 
environment. For an example, see \autoref{sec:tocwithdepthtags}.

When using \csb{etocdepthtag.toc} in combination with \LaTeX's |\include|,
data may not end up in the |.toc| file in the correct order.  For example in
this situation:
\begin{verbatim}
  \clearpage % or anything ending up causing its presence here right before
             % the \etocdepthtag.toc
  \etocdepthtag.toc{sometag}
  \include{some file containing sections}
\end{verbatim}
The tag will end up in the |.toc| file \emph{after} all section headings from
the included file.  The cause is that \LaTeX\ inserts immediately in the
main auxiliary file a command to input the auxiliary file of the included file
(which in turn, contains instructions to add data to the |.toc| file).  But
\csb{etocdepthtag.toc} does not internally use such immediateness, as it uses
the same interface as |\section| and alike commands when they want to write
extra data to the |.toc| file.

So%
%
\footnote{Thanks to Norman \textsc{Ramsey} who reported this problem, together
  with a fix, in July\dots 2016.  Sorry for long delay before updating
  \etoc six years later\dots}
%
% \etocrelease{1.09f} adds 
there is \csb{etocimmediatedepthtag.toc} which will force the tag to be written
immediately to the |.toc| file (well, rather immediately to the |.aux| file,
so before the inclusion of the auxiliary file of the included file).

One should not use this variant systematically.  For example if your document
looks like:
\begin{verbatim}
\clearpage

\section{bbbb}

Some text

\etocdepthtag.toc{sometag}
\etocimmediatedepthtag.toc{someimmediatetag}
\section{cccc}

Some text

\end{document}
\end{verbatim}
then the |someimmediatetag| will end up being inserted in |.toc| file
\emph{before} the |bbbb| section.  This is because \LaTeX's |\section|
uses a \emph{delayed} write, not an \emph{immediate} one.  And
\csb{etocdepthtag.toc} wisely uses a \emph{delayed} write.

As it seems very hard programmatically to identify automatically if the
\emph{immediate} variant of \csb{etocdepthtag.toc} should be used, the package
provides two separate commands and it is up to user to make the correct
choice.


\subsection{The \csbhyp{etocobeydepthtags} and \csbhyp{etocignoredepthtags} commands}
\label{etocobeydepthtags}
\label{etocignoredepthtags}


After \csb{etocignoredepthtags}, the |.toc| depth tags are ignored (but
\csb{etocdepthtag.toc} still works). The package does initially
\csb{etocobeydepthtags} which makes \etoc react to the found tags in the
|.toc| file. 

\section{Adding commands to the \texorpdfstring{\texttt{.toc}}{.toc} file}
\label{sec:addingtotoc}

We described above \csb{etocsettocdepth.toc} and \csb{etocdepthtag.toc} which
both insert commands inside the |.toc| file. An even more general mechanism of
adding ``action tags'' to the |.toc| file could be envisioned, but this would
just be a wrapper for direct use of |\addtocontents{toc}{\something}|.

One should be cautious when adding in this way
things
to the |.toc| file. For example, inserting
\csa{addtocontents}|{toc}{\string\clearpage}|
just
before a \csa{part} to fix the problem when some part entry (in
the table of contents) is isolated at the bottom of one page,
will cause problems with multiple TOCs: this \csa{clearpage}
will be executed by \etoc each time a \toc or \localtoc
command is encountered! The more prudent thing is to do
rather: {\csa{addtocontents}|{toc}{\string\myclearpage}|,}
to have a |\let\myclearpage\relax| at the top level of the
document and  to use where needed something like:
\begin{verbatim}
\let\myclearpage\clearpage
\tableofcontents
\let\myclearpage\relax
\end{verbatim}
The \ctanpkg{memoir} class has the command \csa{settocdepth} which
writes a \csa{changetoc\-depth} command inside the |.toc| file.
This will impact the typesetting by \etoc of \emph{all} tables
of contents, with (possibly) unexpected results: imagine the
document has \csa{settocdepth}|{chapter}| at some point to
avoid having the sections from subsequent chapters be listed
in the main table of contents. Then a local table of contents
in one of these chapters will print a title but will be
without any entry. 

As the \ctanpkg{memoir} class by itself allows multiple\toc
  these issues already arise there,
  independently of \etoc, see page 170 of the \ctanpkg{memoir}
  manual.

For this specific issue, the commands \csb{etocsettocdepth.toc},
\csb{etocignoretoctocdepth} and \csb{etocobeytoctocdepth} are the way to go; or
their variants \csb{etocdepthtag.toc} and \csb{etocsettagdepth}.

As an aside, any |\setcounter{tocdepth}{n}| command added directly to the |.toc|
file will see its effect
% (since release \etocrelease{1.07g})
cease when the end of a table of contents is reached, as \etoc executes a
|\setcounter{tocdepth}{previous_value}| there, to reste the \texttt{tocdepth}
counter to the value it had on entering the table of contents.

\subsection{The hyperref option \emph{hidelinks}}\label{ssec:hidelinks}

The colored links (and also the rectangle links) are a bit
annoying when used in tables of contents, especially when
the document uses \etoc and has plenty of them! One may wish
for having colored links, \emph{except} for those within
table of contents!
Indeed, why would things in TOCs need to be either framed in
rectangles or colored, when the user \emph{already expects
  them to be links}?

I use the following trick:  either in the preamble using
|\AtBeginDocument|, or right after |\begin{document}|, I
  have the command
  \centeredline{|\addtocontents{toc}{\protect\hypersetup{hidelinks}}|}

  \begin{framed}
    All TOCs typeset by \etoc have their contents done
    within a group (as if enclosed in an environment). So
    the command \csa{hypersetup}|{hidelinks}| will be
    executed by \emph{each} TOC, but its effect will be
    limited to that TOC. 
  \end{framed}

  I found out experimentally that the option |hidelinks| could
  indeed be set many times with |\hypersetup| (this is not the
  case of all \ctanpkg{hyperref} options).

\section[The \csbhyp{etocsetlocaltop.toc} command]
        {The \csbhyp{etocsetlocaltop.toc} and
          \csbhyp{etocimmediatesetlocaltop.toc} commands}
\label{etocsetlocaltop.toc}
\label{etocimmediatesetlocaltop.toc}

It is important to understand that \csb{localtableofcontents} works entirely
from data \emph{in the |.toc| file}. If the document, say with |article|
class, contains starred sectioning commands, which are not accompanied
by suitable \csa{addcontentsline}, then these units are completely
transparent to \csb{localtableofcontents}:
\begin{itemize}
\item If \localtoc is issued before |\section*{Foo}|, say locally to a |\section|,
  then the local TOC will include not only the |subsection|s between the
  |\section| and the |\section*{Foo}| but also those following, and it will
  stop only at encountering a later |\section| or |\part| from the document's body.
\item If the command is issued right after |\section*{Foo}| and the later was
  itself subsequent to a (numbered) |\subsection|, then \etoc will think it
  must display a TOC local to the \emph{subsection}.
\end{itemize}

% Since release \etocrelease{1.08k}, \etoc provides the one-argument 
There is the command
\csb{etocsetlocaltop.toc} to insert into the |.toc| file a kind
of ``ghost'' of a given sectioning unit. Here is an example:

\begin{verbatim}
\part*{Extra unnumbered part}
\etocsetlocaltop.toc{part}
\localtableofcontents
\end{verbatim}

So with no |\part| heading inserted into the table of contents via an
|\addcontentsline|, still \localtoc will know it is local to a part.  In this
example the local contents will be delimited by the next numbered |\part|, or
|\part*| with |\addcontentsline|, or also by a later, second,
|\etocsetlocaltop.toc{part}|.

As a (counter)-example consider this document:
\begin{verbatim}
\documentclass{article}
\usepackage{etoc}
\begin{document}
\tableofcontents

\part*{A}
\etocsetlocaltop.toc{part}
\localtableofcontents

\section{I}

\section{II}

\part*{B}

\section{III}

\part*{C}

\section{IV}
\end{document}
\end{verbatim}
It uses only |\part*|.  Thanks to the \csb{etocsetlocaltop.toc} the \localtoc
knows it should report only sections.  But the other |\part*| are invisible to
it as nothing is recorded in the |.toc| file.  So the local table of contents
in this example will list \emph{all} sections not only |I| and |II|.  To fix thix one may
e.g.\@ insert another |\etocsetlocaltop.toc{part}|, this time after |\part*{B}|
(or make this a numbered part, or use |\addcontentsline| for it).

The above document amended with added  |\etocsetlocaltop.toc{part}| after each
unnumbered part will thus have its main TOC without any |Part| heading, but
each |\part| can show a correct \localtoc.  The simpler
approach would be to use |\addcontentsline| with each unnumbered |\part| so
that it ends up in the |.toc| file, but \etoc is keen on allowing the most
diverse point of views.

It should be stressed that the various |\etocsetlocaltop.toc|\marg{sect. unit}
do impact the global \toc: they really act like actual sectioning units,
except for not inducing any typesetting.  In usual document classes, this
would appear to mean that they are completely transparent to the global \toc.
Not the case with \etoc, which adds a virtual assembly of levels: the |.toc|
data originating in |\etocsetlocaltop.toc|\marg{sect. unit} will trigger the
execution of the \marg{finish} parts of the line styles of finer sectioning
units encountered before (either in the global \toc or in an active
\localtoc); and it triggers the \marg{start} parts of the line styles of finer
units encountered after it (again in the global \toc, but also in any
\localtoc which is already activated at a coarser lever).

Depending on how the toc line styles are configured this may translate into
some visual effect; for example with the \etoc own line styles the
\marg{start} and \marg{finish} mostly insert penalties or vertical spaces.

It is a matter of debate if this is good design; a variant serving purely to
influence boundaries of local table of contents with no collateral effects
could be provided.  And the name of the macro was perhaps not so well chosen
as it suggests it acts as would such an hypothetical variant.  In absence of
feature requests we leave the matter standing for now.%
%

Usage of \csb{etocsetlocaltop.toc} interacts with
\csb{etocchecksemptiness} in the expected way: it modifies (as explained
above) the selection made by \csb{localtableofcontents}, hence the decision
whether this local TOC will end up empty or not.

There is also \csb{etocimmediatesetlocaltop.toc}.  This may be useful in some
very special circumstances involving |\include|.  For related discussion see
the documentation of \csb{etocimmediatedepthtag.toc}.


\section{The \csbhyp{etoclocaltop} command}
\label{etoclocaltop}

Within either the TOC style
(\csb{etocsettocstyle}) or the local title styles (\csb{etocsetstyle}), the
control sequence \csb{etoclocaltop} is made equivalent for the duration of
\csb{localtableofcontents} to a numeric (self-delimiting) denotation of the
current top level.

Thus: it will in numeric contexts (|\ifnum|, |\ifcase|, ...) represent zero
for a local TOC corresponding to chapter, or one if in a section, or two if in
a subsection, etc..., assuming of course here that the default levels are
obeyed (see \autoref{sec:tocdepth}).

%\begin{framed}
  \csb{etoclocaltop} from inside the TOC heading (first argument of
  \csb{etocsettocstyle}) has the correct value \emph{only under
    \csb{etocchecksemptiness} regime}. Special circumstances correspond to
  some special values:
  \begin{description}[nolistsep]
  \item[|-3|] (|-\thr@@|)\newline
    signals that \etoc considers the local TOC to be
    ``unknown''; this happens at the last local TOC, for the first \LaTeX\ run
    after adding a new \localtoc to the document. In doubt, \etoc assumes the
    TOC will prove non empty, hence it prints (independently of whether the
    check for emptiness was activated or not) the heading as specified by
    \csb{etocsettocstyle}. Thus, check if \csb{etoclocaltop} gives |-3| as a
    a \meta{number} to detect that situation from within the first argument of
    \csb{etocsettocstyle}, if desired.
  \item[|-1000|](|-\@m|)\newline  is in case of a \localtoc
    being considered ``known'' (although it may still refer to the data in the
    |.toc| file from the previous run) but without the check for emptiness
    having been executed.
  \item[|-10000|](|-\@M|)\newline  is the value when accessed from the title
    of a global TOCs.
  \end{description}
%\end{framed}
%\begin{framed}

  When executed from within a local table of contents \textbf{line styles}
  (\csb{etocsetstyle}), \csb{etoclocaltop} always will hold the correct value,
  whether or not the emptiness check was executed.

  For a global table of contents however, it will always keep the value |-3|.
%\end{framed}

Attention! \cs{etoclocaltop} is only to be queried not set.



\section{Checking TOCs for emptiness}

\subsection{The \csbhyp{etocchecksemptiness} command}
\label{etocchecksemptiness}
\label{etocdoesnotcheckemptiness}

The user needs to issue \csb{etocchecksemptiness} to tell \etoc to check whether
local tables of contents are empty and in case of emptiness to print nothing
at all.\footnote{Thanks to Paul Gaborit who asked for
such a feature.} This
can be useful to authors of \LaTeX{} classes who for example wish to have a
|\chapter| command doing systematically a \localtoc, or for
people producing files via automatic conversions and some of those might have
sectioning commands and others not.

«Emptiness» means that no \csa{contentsline} command would get executed within
the scope of the local table of contents --- empty line styles by themselves do
not make the TOC empty. \etoc always executes the \csb{etocaftertochook}
command; and the test for emptiness itself executes everything else found in
the |.toc| file. See \autoref{sec:addingtotoc} in this context.
\begin{enumerate}
\item the \csb{etocifwasempty} command discussed below can be used from inside
\csb{etocaftertochook}, and even from inside \csb{etocbeforetitlehook}.
\item there is also \csb{etocdoesnotcheckemptiness}.%
% (since \etocrelease{1.08i}.)
\end{enumerate}

The suppression of the heading (more precisely of the toc display style
elements) may be effective only for the final \LaTeX{} runs. For example in
the situation of a \toc|\ref{foo}| where the label |foo| is
not yet recognized, the heading (but not the contents) is printed and the TOC
is declared non-empty. Or, if one adds a \localtoc to a document, on the next
run, the test for emptiness will in fact apply to the next one, and the last
local TOC of the document will have its contents temporarily unknown to \etoc,
hence will be declared non empty, and the heading will be printed.

For a finalized document compiled with initially no auxiliary files, the first
\LaTeX{} run will declare all local TOCs non empty and print for each of them a
heading (and no contents naturally). The second \LaTeX{} run will then
correctly decide which local TOC is empty or not.

\subsection{The \csbhyp{etocnotocifnotoc} command}
\label{etocnotocifnotoc}

The user can then extend the emptiness-checking to the global TOCs with
\csb{etocnotocifnotoc}. May I respectfully give the advice then to rather do
none of |\usepackage{etoc}| nor \toc ? |;-)|. Well, there is always the case
of batch conversions of documents having or not sectioning units.

\subsection{The \csbhyp{etocifwasempty} command}
\label{etocifwasempty}
\label{etocxifwasempty}

The command \csb{etocifwasempty}\marg{YES}\marg{NO} executes \meta{YES} if
the previous TOC was found to be empty and \meta{NO} if its was not so. This
may serve to act appropriately after a truly empty TOC. If
\csb{etocchecksemptiness} has not been issued, this conditional always
executes the \meta{NO} branch.

This command is robust, and \csb{etocxifwasempty} is its expandable
version.

\fbox{Do not forget the second argument: at least an empty pair of braces |{}|
  must be present.}

This conditional may wrongly say that the local TOC is empty or not empty
until \LaTeX{} compilations stabilize. But if it says that a local TOC is
empty, this does mean that \etoc considered the just encountered local table
of contents to be empty (for that run) and thus printed nothing (not even a
|\par|).


\clearpage
\etocdepthtag.toc {examples}
\part{Examples}\label{part:examples}

\thispartstats %% (pas de sous-section)

\etocdefaultlines
\etocsettocstyle {}{}
\localtableofcontents

To understand all code snippets in detail,
one will need to have first browsed through \autoref{sec:linestyles}
and \autoref{sec:tocstyle}.



\section{A first example}
\label{sec:firstexample}
\label{invisiblelocaltableofcontents}

Let us present a first example of specification for line styles.
Immediately after the start of \autoref{part:overview} we inserted in the
source file:
%
\centeredline{\csb{invisiblelocaltableofcontents} |\label{toc:overview}|}
%
This
sets-up the label |toc:overview|, and we can use it at any location in the
document:
%
\centeredline{|\tableofcontents \ref{toc:overview}|}
%
And as we used
|\invisible...|,\footnote{this is a shortcut for setting temporarily the
  |tocdepth| to |-3|, which has the effect to tell \etoc not to print the TOC,
  and not even the heading.} the local TOC will exist only through its clones
elsewhere in the document. 

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begingroup\parindent 0pt \parfillskip 0pt \leftskip 0cm \rightskip 1cm
\etocsetstyle {section}
              {}
              {\leavevmode\leftskip 0cm\relax}
              {\bfseries\normalsize\makebox[.5cm][l]{\etocnumber.}%
               \etocname\nobreak\hfill\nobreak
               \rlap{\makebox[1cm][r]{\mdseries\etocpage}}\par}
              {}
\etocsetstyle {subsection}
              {}
              {\leavevmode\leftskip .5cm\relax }
              {\mdseries\normalsize\makebox[1cm][l]{\etocnumber}%
               \etocname\nobreak\hfill\nobreak
               \rlap{\makebox[1cm][r]{\etocpage}}\par}
              {}
\etocsetstyle {subsubsection}
              {}
              {\leavevmode\leftskip 1.5cm\relax }
              {\mdseries\normalsize\makebox[1cm][l]{\etocnumber}%
               \etocname\nobreak\hfill\nobreak
               \rlap{\makebox[1cm][r]{\etocpage}}\par}
              {}
\etocruledstyle[1]{\bfseries \Large My first \etoc: TOC of
  \autoref{part:overview} (\nameref{part:overview})}
\tableofcontents \ref {toc:overview}
\endgroup
\end{filecontentsdef}

\filecontentsexec\foo

We could have used the line styles defined by \etoc, with
\csb{etocdefaultlines}, or the default document class styles with
\csb{etocstandardlines}, but we were a bit more ambitious here and wanted to
design our own. The technique is a simple one: each heading is in its own
paragraph, which may extend on multiple lines; it is responsible for setting
its own |\leftskip|.

This is a simple design which does not make provisions for page breaks
which should be discouraged in-between a section and a subsection
etc\dots{} as we only used it for the table of contents of this part, thus
with sections as top levels, there was no need to specify a style for
parts too (we defined a subsubsection line style but as it turns
out there are no subsubsections in this part). The two commands used are
\csb{etocsetstyle} for specifying the line styles, and
\csb{etocruledstyle} for the TOC global style.

The |\rightskip| is shared by all, and creates space where the page
numbers get printed. For an elaboration of this technique see the next
\autoref{sec:secondexample} as well as \autoref{sec:tocwithdepthtags}
which provides a TOC with parts and paragraphs. Both allow multi-line
headings and employ a technique for putting page numbers in the right margin
which was inspired from what \LaTeX2e's |\@dottedtocline| macro does.

Here is how it was produced:

\filecontentsprintviascan\foo
\marginattach

\section{A second example}
\label{sec:secondexample}

This second example displays only the contents from
\autoref{sec:linestyles} and \autoref{sec:tocstyle}. This selection
is done via the technique of \emph{depth tags}, described in
\autoref{etocsettagdepth} and \autoref{sec:tocwithdepthtags}.

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begingroup
\newcommand*{\DotsAndPage}
{\nobreak\leaders\hbox{\bfseries\normalsize\hbox to .75ex {\hss.\hss}}%
         \hfill\nobreak
         \makebox[\rightskip][r]{\bfseries\normalsize\etocpage}\par}

\etocsetstyle {part}
{\parindent 0pt
 \nobreak
 \etocskipfirstprefix}
{\pagebreak[3]\bigskip}
{\large\rmfamily\bfseries\centering %\scshape
 \etocifnumbered{Part \etocnumber{} -- }{}\etocname\par}
{}

\etocsetstyle {section}
{\leftskip 0pt \rightskip .75cm \parfillskip-\rightskip
 \nobreak\medskip
 \etocskipfirstprefix}
{\leftskip 0pt \rightskip .75cm \parfillskip-\rightskip
 \pagebreak[1]\smallskip}
{\normalsize\rmfamily\bfseries %\scshape
 \etocnumber. \etocname\DotsAndPage }
{\parfillskip 0pt plus 1fil\relax }

\etocsetstyle {subsection}
{\leftskip1cm\rightskip .75cm \parfillskip 0pt plus 1fil\relax 
 \nobreak\smallskip}
{}
{\footnotesize\sffamily\mdseries\itshape
 \etocname{} (\etocnumber, p. \etocpage). }
{\par\medskip}

\etocsettagdepth {preamble}   {none}
\etocsettagdepth {overview}   {none}
\etocsettagdepth {styling}    {subsection}
\etocsettagdepth {control}    {none}
\etocsettagdepth {examples}   {none}
\etocsettagdepth {advanced}   {none}
\etocsettagdepth {etocandworld}{none}
\etocsettagdepth {code}       {none}

\etocsettocstyle {\centering\LARGE\textsc{\contentsname}\par\nobreak\medskip}{}
\etocsetnexttocdepth {subsection}
\tableofcontents
\endgroup
\end{filecontentsdef}
\filecontentsexec\foo

The code:
\filecontentsprintviascan\foo
\marginattach

\section{A Beautiful Thesis example}

Here is a relatively  simple example of use of the package
functionalities. 
Let us set up some line styles. We choose a style for sections and
sub-sections which would be suitable for, respectively, sections and
sub-sections in an average length memoir. The line style specifications have
some redundancy for clarity, and do not care about what to do at possible page
breaks. Also, they do not worry about potential multi-column use.

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begingroup % we start a group to keep the style changes local
\newlength{\tocleftmargin}    \setlength{\tocleftmargin}{4cm}
\newlength{\tocrightmargin}   \setlength{\tocrightmargin}{1cm}

\etocsetstyle{section}              % will pretend to be a Chapter
{\addvspace{1ex}\parfillskip0pt
 \leftskip\tocleftmargin            % (already done in title)
 \rightskip\the\tocrightmargin plus 1fil
 \parindent0pt\color{cyan}}         % (already done)
{\bfseries\LARGE\upshape\addvspace{1ex}\leavevmode}
{\llap{Chapter\hspace{.5em}{\etocnumber}\hspace{.75cm}}\etocname
 \nobreak\hfill\kern1em\makebox[-\tocrightmargin][l]{\makebox[0pt]{\etocpage}}\par}
{}

\etocsetstyle{subsection}           % will pretend to be a Section
{}
{\mdseries\large\addvspace{.5ex}\leavevmode}
{\llap{\etocnumber\hspace{.75cm}}\textit{\etocname}%
 \hfill\makebox[-\tocrightmargin][l]{\makebox[0pt]{\etocpage}}\par}
{}

\def\tmptitle{My Beautiful Thesis}
\etocsettocstyle{\color{cyan}\parindent0pt \leftskip\tocleftmargin
  \leavevmode\leaders\hrule height 1pt\hfill\ 
  \huge\textit{\tmptitle}\par}{\bigskip}

\tableofcontents \ref{toc:overview}
\endgroup
\end{filecontentsdef}

\filecontentsexec\foo

\filecontentsprintviascan\foo
\marginattach


\section{Testing the compatibility mode}\label{sec:testingcompat}

As a further example we now print the local table of contents
of \autoref{sec:tocstyle}. First we will test the compatibility mode.\footnote{the
present document uses the \ctanpkg{scrartcl} class, and we check here that
the \etoc compatibility mode does respect the customizing done via the
class commands.}   The original is the local table of contents of
\autoref{sec:tocstyle}, to which we allocated the label |toc:tocstyle|.
\begin{verbatim}
\begingroup % to keep in particular toc=left with local effect
\KOMAoptions{toc=left}
\etocclasstocstyle % necessary for the display to obey toc=left
\etocstandardlines
\tableofcontents \ref{toc:tocstyle}
\endgroup
\end{verbatim}
\begingroup
\KOMAoptions{toc=left}
\etocclasstocstyle
\etocstandardlines
\tableofcontents \ref{toc:tocstyle}
\endgroup

\section{Another compatibility mode}
\label{sec:anothercompat}

As explained in \autoref{subs:compat}, the commands \csb{etocstandardlines}
and \csb{etocetoclocaltocstyle} tell \etoc to, essentially, act as an
observer.  And it starts in this state initially.  The document class layout
for the table of contents is then perfectly obeyed (well, hopefully).  There
is no way \emph{if remaining in this compatibility mode} to customize this
standard layout (change fonts, margins, vertical spacings, etc...) from within
the package.

For customizing \emph{while remaining in the compatibility mode}, use some
package dedicated to this task; because \etoc either is (temporarily perhaps)
in compatibility mode with no customization on its part possible, or the user
has specified the layout in \csb{etocsetstyle} commands (and
\csb{etocsettocstyle}) and is supposedly in complete control.

Well, there is actually an alternative. It is possible to use the
\csb{etocsetstyle} commands to recreate an artificial compatibility mode, in
order to achieve effects like the following, all things being otherwise equal
to the document class defaults:
\begin{enumerate}[noitemsep]
\item get the \ctanpkg{hyperref} link to encapsulate only the names, but not the numbers
  of each entry of the table of contents,
\item use the document class style for chapters and sections, but modify it only
  for subsections,
\item do either of the above only for some portions of the table of contents.
\end{enumerate}

One only needs
to use within the arguments of \csb{etocsetstyle} the \LaTeX{} standard
\csa{l@chapter}, \csa{l@section}, etc...  re-constituting their arguments using
\csb{etocname}, \csb{etocnumber}, \csb{etocpage} as one wishes.
Here is an example. Include in the preamble:

\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\makeatletter
\newcommand{\MyLocalTOC}[1][section]{%
  \begingroup
  \etocsetstyle{section}{}{} 
    {\l@section{\numberline{\etocnumber}\etocname}{\etocpage}}{}%
  \etocsetstyle{subsection}{}{}
    {\l@subsection{\numberline{\etocnumber}\etocname}{\etocpage}}{}%
  \etocsetstyle{subsubsection}{}{}
    {\l@subsubsection{\numberline{\etocnumber}\etocname}{\etocpage}}{}%
  % etc... if further sectioning units are needed
  %        (i.e. not excluded by tocdepth and actually there in document)
  % Here #1 defaults to section, meaning this is appropriate
  % for local TOC in a chapter
  \etocsettocstyle{\@nameuse{#1}*{Local contents}}
                  {}
  %
  \localtableofcontents     
  \endgroup}
\makeatother
\end{filecontentshere}
\marginattach

Then use \csa{MyLocalTOC} in the document body.  It is prepared
for being  local to a \csa{chapter}'s as it typesets the heading of the TOC
by default as un unnumbered section.%
%
\footnote{Parts are handled somewhat differently according to whether
one uses the standard or other classes; please check the source of these
classes for what is to emulate here.}

One can add to the above arbitrary text formatting commands, for example
one can replace |\etocpage| in the code above by |\textcolor{blue}{\etocpage}|.

Only pay attention to using |\makeatletter/\makeatother| as we are handling
\LaTeX{} macros with the dangerous sign |@| in their names.

To give another example, one sees in \texttt{article.cls} the following
definition:
\begin{verbatim}
\newcommand*\l@subsection{\@dottedtocline{2}{1.5em}{2.3em}}
\end{verbatim}
The first argument is the level, the second the indent, and the third the
numwidth (see the \ctanpkg{tocloft} documentation).  So if we issue in a
document using the \texttt{article} class:
\begin{verbatim}
\makeatletter
\etocsetstyle{subsection}
    {]
    {}
    {\@dottedtocline{2}{1.5em}{2.3em}{\numberline{etocnumber}\etocname}{\etocpage}}
    {}
\makeatother
\end{verbatim}
we then basically reconstitute the default rendering.  Here is more careful
code:
\begin{verbatim}
\makeatletter
\etocsetstyle{subsection}
    {]
    {}
    {\@dottedtocline{2}{1.5em}{2.3em}{\etocifnumbered{\numberline{etocnumber}}{}%
                                      \etocname}{\etocpage}}
    {}
\makeatother
\end{verbatim}
Hence one can very easily without any (additional...) package modify the
hard-coded indent |1.5em| and numwidth |2.3em|.  But in general one has to do
this in a synchronized way also for subsubsections, and for sections.  The
definition of |\l@section| in the \texttt{article} class source is a bit more
complex.

Nevertheless this technique is probably the fastest (but see the example at
start of \autoref{sec:linestyles}) to get going with \etoc even if one is
primarily interested only in its \localtoc, as typesetting local tables of
contents exactly as global tables of contents is not ideal.  For example for a
local TOC in a section, it looks appropriate to modify the above into
\begin{verbatim}
\makeatletter
\etocsetstyle{subsection}
    {]
    {}
    {\@dottedtocline{2}{0}{2.3em}{\etocifnumbered{\numberline{etocnumber}}{}%
                                      \etocname}{\etocpage}}
    {}
\makeatother
\end{verbatim}
to cancel the indentation.  One will have to keep the indents and numwidths in
sync with similar changes to other line styles, if \csa{contentsline}'s of
various levels are to be executed.

%
%
The number and the name of each entry are each separately an \ctanpkg{hyperref}
links, as is always the case with \etoc, when not in compatibility
mode. Replacing \csb{etocnumber} with \csb{etocthenumber} will give a TOC where
the numbers are not links anymore, but the names still are. Or one may decide
to use \csb{etocthename} and keep an hyperlinked number with \csb{etocnumber}.

For a more sophisticated example see \autoref{sec:anothercompatadvanced}.

\begin{shaded}\footnotesize\itshape
  \textcolor{red}{Attention Please!}  The \LaTeX{} kernel is moving towards
  adding \emph{tagging} to the PDF, in a way mostly automated and transparent
  to user.  \etoc will in due time accompany that evolution but this may mean
  that it will use for its own the hooks that \LaTeX{} will place for example
  in \emph{\csa{@dottedtocline}}.  So, if the user explicitly also requires
  usage of \emph{\csa{@dottedtocline}}, this \emph{may} mean that some tagging
  code would be executed twice, possibly causing some havoc.

  My remark is \emph{purely hypothetical}, as a.t.t.o.w.\@ (2023/02/22) I have
  only started looking in the matter, and the \LaTeX{} and \ctanpkg{hyperref}
  TOC related changes have started being visible to developers only a few days
  ago.

  It may be however, that activating tagging could mean that the simple-minded
  recycling techniques described in this section will not work.  I guess \etoc
  will always have the possibility to let the user specify that \etoc should
  not take care itself of the tagging (which it has to do in general, because
  the \LaTeX{} hooks are located in places such as \emph{\csa{@dottedtocline}}
  which \etoc does not execute, except if asked to do so as in the example
  above), so perhaps the techniques here will still work but require some
  \emph{\csa{etocnotagging}} or some \emph{noetoctagging} option to the
  \localtoc or \toc commands.\par
\end{shaded}


\section{Emulating the book class}\label{sec:thirdexample}

As explained in \autoref{subs:compat}: without explicit use of an
\csb{etocsetstyle} command the package will leave to the document class the
hand regarding the ``toc line styles''. It is sometimes asked by users (for
example those using \etoc for its \csb{localtableofcontents}) how to stay
close to but not completely identical with the design implemented by the
standard classes, such as |book|. I can recommend package \ctanpkg{tocloft} for this,
as it is compatible with \etoc (see \autoref{subs:tocloft}) and thus \etoc will
obey the \ctanpkg{tocloft} customizations (as long as no use has been made of
\csb{etocsetstyle}). It is also possible to modify only the style for, say,
sections and leave the parts, chapters, subsections as in the document class,
via the technique from \autoref{sec:anothercompat}.

But for complete control, here is a translation of the |book| class code into
\etoc lingua. It is then easy to modify the relevant lengths or adjust the
used fonts. I thank \textsc{Denis Bitouzé} for prompting me to include this in
the \etoc manual, as it resulted from some conversation we had about this. The
code is not 100\% faithful to the |book| class, and particularly its rendering
of (multi-line) non-numbered units differs (... I think, as I copied pasted as
is the code from where I had stored it and did not do much thinking about it
again). Some proficiency in low-level \TeX\ and \LaTeX\ macros is needed to
understand what the code says, but for modifying fonts or some lengths such
in-depth understanding is not needed.

With some extra code one can \emph{automatically adjust the widths} assigned
to typesetting sectioning numbers in order to prevent overflows, even with for
example \MakeUppercase{\romannumeral 38}; but this is a more advanced feature
which I have moved to \autoref{sec:thirdexampleextra}.

First we set up some lengths. I use macro registers, not real \LaTeX\ lengths.
When using |em|'s however, this means that one must pay attention to when the
actual dimension assignment is made, as this will then depend upon the current
font settings. In the code below, at the location where the \csa{TOCnumwidthB}
and \csa{TOCnumwidthC} will be used, the |1em| from their specification will
be matched to the normal medium series font, not the bold font; this is
deliberate so that one can compare more readily with the other dimensions;
besides, with the \csa{TOCcomputenumwidths} from
\autoref{sec:thirdexampleextra} these macros will actually hold a dimension
using |pt| as dimensional unit.

\begin{filecontentshere}{etocsnippet-\snippetno.tex}
% it will be easy to globally shift the TOC horizontally if needed
\def\TOCleftmargin     {0pt}
\def\TOCrightmargin    {2.55em}% like LaTeX's \@tocrmarg

% this is for dotted leaders
\newbox\TOCleaderbox
\def\TOCleaderboxwidth {0.7777em}% about like what standard classes do

% vertical spacing
\def\TOCverysmallvskip {0pt plus .2pt}
\def\TOCmedvskip       {1em plus 1pt}
\def\TOCbigvskip       {2.25em plus 1pt}

% the ``numwidths'' for typesetting the numbering of division units.
% I don't recall exactly how (and for which fonts) these figures were chosen.
% They quickly prove too small if using Roman numerals (as do too the book
% class defaults even though they are a bit larger).
\def\TOCnumwidthB {1.5em} % chapter
\def\TOCnumwidthC {2.278em}% section, I think default is 2.3em
\def\TOCnumwidthD {3.056em}% analog in standard class is 3.2em
\def\TOCnumwidthE {3.833em}% analog in standard class is 4.1em
\def\TOCnumwidthF {4.611em}% analog in standard class is 5em
\def\TOCnumwidthG {5.389em}% analog in standard class is 6em

% The code for the ``global toc style''.

\newcommand*\TOCglobalstyle {%
\etocsettocstyle
   {\if@twocolumn \@restonecoltrue \onecolumn \else \@restonecolfalse \fi
    \parindent\z@ \leftskip\z@skip \rightskip \z@skip
    \setbox\TOCleaderbox\hbox to \TOCleaderboxwidth{\hss.\hss}%
    \chapter *{\noindent\kern\TOCleftmargin\relax % uses "pt"...
        \contentsname
        \@mkboth {\MakeUppercase \contentsname}{\MakeUppercase \contentsname}}%
    \rightskip    \TOCrightmargin\relax
    \parfillskip -\rightskip % or a smaller value if desired
    \leftskip     \TOCleftmargin \relax }
   {\if@restonecol \twocolumn \fi\cleardoublepage}%
%
\etocsetstyle{part}
 {}
 {\addpenalty {-\@highpenalty}%
  \addvspace \TOCbigvskip
  \leavevmode
   {\large \bfseries % use a group to limit font change
      \interlinepenalty\@M
      \etocifnumbered{\etocnumber\hspace{1em}}{}%
      \etocname
      \nobreak\hfil\makebox[-\parfillskip][r]{\etocpage}}\par
  \nobreak
  }
 {}
 {}%
%
\etocsetstyle{chapter}
 {\advance\leftskip\TOCnumwidthB\relax}
 {\addpenalty {-\@highpenalty }%
  \vskip \TOCmedvskip\relax
  \leavevmode
  {\interlinepenalty\@M
   \etocifnumbered
      {\llap{\makebox[\TOCnumwidthB][l]{\bfseries\etocnumber}}}
      {\advance\leftskip-\TOCnumwidthB\relax}%
   \bfseries\etocname
      \nobreak\hfil\makebox[-\parfillskip][r]{\etocpage}\par }%
  \penalty \@highpenalty 
  }
 {}
 {\advance\leftskip-\TOCnumwidthB\relax}%
%
 \TOCsetlinestyle {section}      {\TOCnumwidthC}%
 \TOCsetlinestyle {subsection}   {\TOCnumwidthD}%
 \TOCsetlinestyle {subsubsection}{\TOCnumwidthE}%
 \TOCsetlinestyle {paragraph}    {\TOCnumwidthF}%
 \TOCsetlinestyle {subparagraph} {\TOCnumwidthG}%
}% end of \TOCglobalstyle

%The common code for line styles is abstracted into a macro:
 
\newcommand\TOCsetlinestyle [2]{% #1= unit, #2= numwidth as macro
\etocsetstyle{#1}
 {\advance\leftskip#2\relax}
 {\vskip \TOCverysmallvskip\relax
  \leavevmode
  {\interlinepenalty\@M
   \etocifnumbered
     {\llap{\makebox[#2][l]{\etocnumber}}}{\advance\leftskip-#2\relax}%
   \etocname
   \nobreak\leaders \copy\TOCleaderbox
   \hfil\makebox[-\parfillskip][r]{\etocpage}%
   \par }%
 }
 {}
 {\advance\leftskip-#2\relax}%
}
\makeatother
\end{filecontentshere}
\marginattach

Nota Bene: the code deliberately handles the non-numbered sectioning units
unlike the way of the standard document classes (particularly regarding the
alignment of multi-line headings.)

The whole thing was encapsulated in \csa{TOCglobalstyle}, because we also want
a \csa{TOClocalstyle} for local tables of contents which typically will want
to use |\section*| rather than |\chapter*| and not insert page marks in the
headers. The \csa{TOClocalstyle} is to be issued once, after the main document
TOC, or rather before using \localtoc. If one wants a full
TOC at end of document one will naturally have to issue again
\csa{TOCglobalstyle} there.

\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\makeatletter
\newcommand*\TOClocalstyle {%
\etocsettocstyle
    {\if@twocolumn \@restonecoltrue \onecolumn \else \@restonecolfalse \fi
     \setbox\TOCleaderbox\hbox to \TOCleaderboxwidth{\hss.\hss}%
     \parindent\z@
     \dimen@ 2.25em % for left indenting
     \section *{\kern\dimen@ % use of \dimen@ works here by sheer luck
       \contentsname
       % un-comment this if marks are wanted:
       %\@mkboth {\MakeUppercase \contentsname}{\MakeUppercase \contentsname}%
       }% end of \section
     \parskip \z@skip
     \vspace{-1.25\baselineskip}% somewhat ad hoc
     \leftskip  2.25em
     \rightskip 4.5em
     \advance\rightskip-\TOCrightmargin\relax
     \leavevmode\leaders\hrule\@height\p@\hfill\kern\z@\par
     \rightskip 4.5em 
     \parfillskip -\TOCrightmargin\relax }
    {\nobreak\vskip-.5\baselineskip
     \leavevmode\leaders\hrule\@height\p@\hfill\kern\z@\par
     \bigskip
     \if@restonecol \twocolumn \fi }%
%
\etocsetstyle{section}
 {\advance\leftskip\TOCnumwidthC\relax}
 {\addpenalty \@secpenalty
  \etociffirst{}{\addvspace{\TOCmedvskip}}%
  \leavevmode
  {\interlinepenalty\@M
   \bfseries\etocifnumbered
      {\llap{\makebox[\TOCnumwidthC][l]{\etocnumber}}}
      {\advance\leftskip-\TOCnumwidthC}%
   \etocname\nobreak\hfil\makebox[-\parfillskip][r]{\etocpage}\par }%
  \penalty \@highpenalty }
 {}
 {\advance\leftskip-\TOCnumwidthC\relax}%
% the rest is identical with code for global tocs:
 \TOCsetlinestyle {subsection}   {\TOCnumwidthD}%
 \TOCsetlinestyle {subsubsection}{\TOCnumwidthE}%
 \TOCsetlinestyle {paragraph}    {\TOCnumwidthF}%
 \TOCsetlinestyle {subparagraph} {\TOCnumwidthG}%
}% end of \TOClocalstyle
\makeatother
\end{filecontentshere}
\marginattach

As mentioned previously, this handles non-numbered (multi-line) sectioning
units somewhat differently from what happens in the standard document classes.

For some reason this code has some hard-coded |2.25em| and |4.5em| which were
not abstracted into macros or lengths. The code inserts horizontal rules above
and below the TOC contents in a non-separable by pagebreak way.

See \autoref{sec:thirdexampleextra} for more.

\section{A framed display}

We now opt for a ``framed'' style, using the package default
line styles and some colors added (it has been put in a float which appears
\vpageref{toc:b}).


\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\etocdefaultlines
\begingroup 
\renewcommand{\etoccolumnsep}{2em}
\renewcommand{\etocinnerleftsep}{1.5em}
\renewcommand{\etocinnerrightsep}{1.5em}
% specify a background color for the toc contents
\renewcommand{\etocbkgcolorcmd}{\color{yellow!10}}
% set up the top and bottom rules 
\renewcommand{\etoctoprule}{\hrule height 1pt}
\renewcommand{\etoctoprulecolorcmd}{\color{red!25}}
\renewcommand{\etocbottomrule}{\hrule height 1pt}
\renewcommand{\etocbottomrulecolorcmd}{\color{red!25}}
% set up the left and right rules
\renewcommand{\etocleftrule}{\vrule width 5pt}
\renewcommand{\etocrightrule}{\vrule width 5pt}
\renewcommand{\etocleftrulecolorcmd}{\color{red!25}}
\renewcommand{\etocrightrulecolorcmd}{\color{red!25}}
% use \fcolorbox to set up a colored frame for the title
\fboxrule1pt
\renewcommand{\etocbelowtocskip}{0pt\relax}
\etocframedstyle {\normalsize\rmfamily\itshape
  \fcolorbox{red}{white}{\parbox{.8\linewidth}{\centering
      This is a table of contents \`a la \etoc, but for
      the subsections and subsubsections of \autoref{sec:tocstyle}.
      As it is put in a frame, it has to be small enough to fit on 
      one page. It has the label |toc:b|.}}}
\begin{figure}[ht!]
  \centering
\tableofcontents \label{toc:b} \ref{toc:tocstyle}
\end{figure}
\endgroup
\end{filecontentshere}
\marginattach

\filecontentsexec\filecontentsheremacro




\section{Another TOC with background color}\label{ssec:again}

Let us now try out some more sophisticated line styles. The display will use
the \csb{etocframedstyle} package command, which requires that the produced
table of contents fits on a single page. We wrap it up in a
\hyperref[toc:floating]{figure environment} showing up
\vpageref{toc:floating}.

This design uses the \etoc `framed' style with a background color. The frame
borders have been set to have the same color as the one serving as background
for the entire thing. It would be advantageous to use rather inside
\csb{etocsettocstyle} commands from a package like |tcolorbox| as this allows
sophisticated breakable boxes (with |TikZ/pgf| for decoration.)

The details of the line styles used here are a bit involved, they were written
by the author at some early stage of this documentation and have only been
slightly revised to use more \LaTeX-commands and less \TeX-primitives. Similar
code is used also for \hyperref[toc:clone]{this other toc}.


\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\begin{figure}[htbp!]\centering
\colorlet{subsecnum}{black}
\colorlet{secbackground}{green!30}
\colorlet{tocbackground}{red!20!green!20}

\renewcommand{\etocbkgcolorcmd}{\color{tocbackground}}
\renewcommand{\etocleftrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etocrightrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etocbottomrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etoctoprulecolorcmd}{\color{tocbackground}}

\renewcommand{\etocleftrule}{\vrule width 3cm}
\renewcommand{\etocrightrule}{\vrule width 1cm}
\renewcommand{\etocbottomrule}{\hrule height 12pt}
\renewcommand{\etoctoprule}{\hrule height 12pt}

\renewcommand{\etocinnertopsep}{0pt}
\renewcommand{\etocinnerbottomsep}{0pt}
\renewcommand{\etocinnerleftsep}{0pt}
\renewcommand{\etocinnerrightsep}{0pt}

\newcommand\shiftedwhiterule[2]{%
    \hbox to \linewidth{\color{white}%
    \hskip#1\leaders\vrule height1pt\hfil}\nointerlineskip
    \vskip#2}

\etocsetstyle{subsubsection}
{\etocskipfirstprefix}
{\shiftedwhiterule{\leftskip}{6pt}}
{\sffamily\footnotesize
  \leftskip2.3cm\hangindent1cm\rightskip.5cm\relax
  \makebox[1cm][l]{\color{subsecnum}\etocnumber}%
  \color{black}\etocname
  \nobreak\leaders\hbox to.2cm{\hss.}\hfill
  \rlap{\makebox[.5cm][r]{\etocpage\hspace{.1cm}}}\par
  \nointerlineskip\vskip3pt}
{}

\etocsetstyle{subsection}
{\etocskipfirstprefix}
{\shiftedwhiterule{1.5cm}{6pt}}
{\sffamily\small
  \leftskip1.5cm\hangindent.8cm\rightskip.5cm\relax
  \makebox[.75cm][l]{\color{subsecnum}\etocnumber}%
  \color{black}\etocname
  \nobreak\leaders\hbox to.2cm{\hss.}\hfill
  \rlap{\makebox[.5cm][r]{\etocpage\hspace{.1cm}}}\par
  \nointerlineskip\vskip3pt}
{}

\newcommand{\coloredstuff}[2]{%
            \leftskip0pt\rightskip0pt\parskip0pt
            \fboxsep0pt % \colorbox uses \fboxsep also when no frame!
       \noindent\colorbox{secbackground}
               {\parbox{\linewidth}{%
                    \vskip5pt
                    {\noindent\color{#1}#2\par}\nointerlineskip
                    \vskip3pt}}%
       \par\nointerlineskip}

\etocsetstyle{section}
{\coloredstuff{blue}{\hfil \bfseries\large Contents of Part One\hfil}}
{\vskip3pt\sffamily\small}
{\coloredstuff{blue}
    {\leftskip1.5cm\rightskip.5cm\parfillskip-\rightskip
     \makebox[0pt][r]{\makebox[.5cm][l]{\etocnumber}}%
     \etocname\nobreak\hfill\makebox[.5cm][r]{\etocpage\hspace{.1cm}}}%
 \vskip6pt}
{}

\etocframedstyle[1]{}
\tableofcontents \label{toc:floating} \ref{toc:part:styling}
\vspace{-\baselineskip}
\centeredline{|\tableofcontents \ref{toc:part:styling}| 
(\emph{cf.} \hyperref[toc:clone]{this other toc})}
\end{figure}
\end{filecontentshere}
\marginattach

\filecontentsexec\filecontentsheremacro
The table of contents produced by this code appears on \vpageref{toc:floating}.

\section{A (crazy) inline display}
\label{sec:crazy}

Let us construct some crazy inline display of the table of
contents of this entire document.  We will typeset the subsections as
footnotes... This kind of style is suitable for a hyperlinked
document, probably not for print! (although I like it, but my personal tastes in
many matters do not seem to be widely shared).

%%%% Note: 27 april 2014 

%%%% except for a miraculous situation depending from the quantity of previous
%%%% material this TOC will have links extending accross pagebreaks, which
%%%% dvipdfmx does not know how to handle completely. Apart from that the output
%%%% is ok, thus no need to try seriously to avoid them. 

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begingroup
\newsavebox{\forsubsections}
\etocsetstyle{part}{\upshape. \etocskipfirstprefix}
                   {. \upshape}
                   {\bfseries\etocname:~~}
                   {}
\etocsetstyle{section}{\itshape\etocskipfirstprefix}
                      {, }
                      {\mdseries\etocname}
                      {}
\etocsetstyle{subsection}
    {\begin{lrbox}{\forsubsections}\footnotesize\upshape\etocskipfirstprefix}
    {; }
    {\etocname}
    {.\end{lrbox}\footnote{\unhbox\forsubsections}}
\etocsetstyle{subsubsection}
    { (\itshape\etocskipfirstprefix}
    {, }
    {\etocname}
    {\/\upshape)}
\etocsettocstyle{Here is the inline table of contents. }{.\par}
\tableofcontents \label{toc:crazyinline}
\endgroup
\end{filecontentsdef}

\filecontentsexec\foo

The code used:
\filecontentsprintviascan\foo
\marginattach

\section{One more example of colored TOC layout}
\label{ssec:tocclone}

The command \csb{etocframedstyle} puts the title on the top
rule in a centered position. This is not very convenient for
this example so we included the title as part of the
\meta{start} code at section level, to get it \emph{inside}
the frame.

\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\begingroup
\definecolor{subsecnum}{RGB}{13,151,225}
\definecolor{secbackground}{RGB}{0,177,235}
\definecolor{tocbackground}{RGB}{212,237,252}

\renewcommand{\etocbkgcolorcmd}{\color{tocbackground}}
\renewcommand{\etocleftrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etocrightrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etocbottomrulecolorcmd}{\color{tocbackground}}
\renewcommand{\etoctoprulecolorcmd}{\color{tocbackground}}

\renewcommand{\etocleftrule}{\vrule width 1cm}
\renewcommand{\etocrightrule}{\vrule width .5cm}
\renewcommand{\etocbottomrule}{\hrule height 12pt}
\renewcommand{\etoctoprule}{\hrule height 12pt}

\renewcommand{\etocinnertopsep}{0pt}
\renewcommand{\etocinnerbottomsep}{0pt}
\renewcommand{\etocinnerleftsep}{0pt}
\renewcommand{\etocinnerrightsep}{0pt}

\newcommand\shiftedwhiterule[2]{%
    \hbox to \linewidth{\color{white}%
    \hskip#1\leaders\vrule height1pt\hfil}\nointerlineskip\vskip#2}

\etocsetstyle{subsubsection}{\etocskipfirstprefix}
  {\shiftedwhiterule{\leftskip}{6pt}}
  {\sffamily\footnotesize
     \leftskip2.5cm\hangindent1cm\rightskip1cm\noindent
     \hbox to 1cm{\color{subsecnum}\etocnumber\hss}%
     \color{black}\etocname\leaders\hbox to .2cm{\hss.}\hfill
     \rlap{\hbox to 1cm{\hss\etocpage\hskip.2cm}}\par
     \nointerlineskip\vskip3pt}
  {}

\etocsetstyle{subsection}{\etocskipfirstprefix}
  {\shiftedwhiterule{1.5cm}{6pt}}
  {\sffamily\small
     \leftskip1.5cm\hangindent1cm\rightskip1cm\noindent
     \hbox to 1cm{\color{subsecnum}\etocnumber\hss}%
     \color{black}\etocname\leaders\hbox to .2cm{\hss.}\hfill
     \rlap{\hbox to 1cm{\hss\etocpage\hskip.2cm}}\par
     \nointerlineskip\vskip6pt}
  {}

\newcommand{\coloredstuff}[2]{%
            \leftskip0pt\rightskip0pt\parskip0pt
            \fboxsep0pt % \colorbox uses \fboxsep also when no frame!
       \noindent\colorbox{secbackground}
               {\parbox{\linewidth}{%
                    \vskip5pt
                    {\noindent\color{#1}#2\par}\nointerlineskip
                    \vskip3pt}}%
       \par\nointerlineskip}

\etocsetstyle{section}
{\coloredstuff{white}
     {\hfil \hyperref[toc:b]{\bfseries\large I am a twin of  
     that other TOC (click me!)}\hfil}}
{\vskip3pt\sffamily\small}
{\coloredstuff{white}
    {\leftskip1.5cm\rightskip.5cm\parfillskip-\rightskip
     \makebox[0pt][r]{\makebox[.5cm][r]{\etocnumber\hspace{.2cm}}}%
     \etocname\hfill\makebox[.5cm][r]{\etocpage\hspace{.2cm}}}%
 \vskip6pt }
{}

\etocframedstyle[1]{}
\tableofcontents \label{toc:clone} \ref{toc:tocstyle}
\endgroup
\end{filecontentshere}
\marginattach

\filecontentsexec\filecontentsheremacro
% 1.07l on the occasion of traduction into German documentation 
     % APRIL 26, 2014 Improvement in the section style for better placement of
     % page number when the section name is more than one line long. Use of
     % \makebox rather than \hbox, to be more LaTeX like.

The TOC has been put in a \hyperref[toc:clone]{float} which appears
\vpageref{toc:clone}. The coding is a bit involved\footnote{and reveals the
  author's preference for the \TeX{} syntax...} as it does not use any
additional package. Also, it was written at some early stage and I have not
revised it since.

A better solution would be to use some package to set
up a background color possibly extending accross pages, as the
framed style (which we used to get this background
color) can only deal with material short enough to fit on one
page.

% 1.2 doc: commenté out to avoid a new page 
% ah non finalement car cause TOC as a tree d'être sur page impaire,
% ce qui est moins bien à cause des overlap.
Regarding colors, generally speaking all color commands inside
\etoc are initially defined to do nothing, and the choice to
use or not colors is left to the user.

\clearpage
\etocdepthtag.toc {advanced}
\part{Advanced examples}
\label{part:surprising}

\thispartstats %% (pas de sous-section)

\etocdefaultlines
\etocsettocstyle {}{}
\localtableofcontents

\section{The TOC of TOCs}
\label{sec:tocoftocs}

\begingroup % \endgroup just after the \tableofcontents command
\etocinline
\etocsetlevel{part}{1}
\etocsetlevel{visibletoc}{0}
\etocsetstyle{visibletoc}
    {\etocskipfirstprefix}
    {, }
    {{\color{niceone}\etocname}}
    {}
\etocsettocstyle{}{}
\etocsetnexttocdepth{visibletoc}


Here is the numbered and linked list of all tables of contents which are
displayed within this document:\footnote{The TOCs put in
  floats may change the order: the numbers are listed
  in the order the TOCs are typeset in the document; but the numbering
  itself is from the order of the TOCs in the \emph{source} of
  this document... }
\tableofcontents
\endgroup. And to obtain
it here we just wrote:\par\smallskip 
{\leftskip1cm\rightskip2cm
  \ttfamily\small\baselineskip11pt \noindent Here is the
  numbered and linked list of all tables of contents which are
  displayed within this
  document:~\string\tableofcontents.\par}

  The preparatory work was the following. First, we defined a
  counter |visibletoc| whose vocation is to get incremented at
  each displayed toc. \etoc has its own private counter but it
  counts all TOCs, even those not displayed because the |tocdepth|
  value was |-2| or |-3|.

  We could have added manually |\refstepcounter{visibletoc}|
  and |\label| commands at all suitable locations in the
  document source, and we would then have used here |\ref|
  commands, but this imposes heavy manual editing of the source.

  There is a much better way: there is a hook
  \csb{etocaftertitlehook} and we told it to increment the
  |visibletoc| counter and to write a line to the |.toc| file,
  in a manner analogous to what sectioning commands such as
  |chapter|, |section|, or |subsection| do. As \etoc
  increments its own private counter even before typesetting
  the title of a table of contents, this provides (most of the
  time) a better link destination than any counter manipulated
  from inside \csb{etocaftertitlehook} (for which the link
  would target the area just after the title). So, rather than
  including |\refstepcounter{visibletoc}| inside
  \csb{etocaftertitlehook}, we just put there
  |\stepcounter{visibletoc}| followed by the command
  \csb{etoctoccontentsline}|{visibletoc}{\thevisibletoc}|. This \etoc
  command \csb{etoctoccontentsline}\marg{level\_name}\marg{name} has the same
  effect as:
  \centeredline{|    ||\addcontentsline{toc}|\marg{level\_name}\marg{name}}
  but its usefulness is to circumvent\footnote{using \csa{addtocontents} rather
    than \csa{addcontentsline}} the patching for automatic creation
  of bookmarks done to \csa{addcontentsline} by the \ctanpkg{hyperref} package, 
  as pdf bookmarks don't make 
  much sense here (and would elicit a complaint
  of \ctanpkg{hyperref} that the bookmark level is `unknown').\footnote{%
  The package provides a starred variant
  \staritb{etoctoccontentsline}, which does allow the creation
  of bookmarks and has a third mandatory argument which is the
  Level to be used by these bookmarks; depending on the context
  the starred as well as the non-starred variants may be
  profitably preceded by \csa{phantomsection}.}

  Finally, the preamble of the document did
  |\etocsetlevel{visibletoc}{6}|. The level |6| (or anything
  with a higher number) is ignored, even if |tocdepth| has
  value |10| for example; this is independently of whether \etoc
  uses the document class default line styles or its own line
  styles, or the ones defined by the user with the
  \csb{etocsetstyle} command. So there is no need to worry that
  something could go wrong. 

  Then, only here we have set |\etocsetlevel{visibletoc}{0}|. And to display
  only this kind of entries we assign temporarily to |part| and |chapter| level
  |1| (or anything higher than zero) and set |tocdepth| to the value |0|. We
  also did%
%
\centeredline{\csb{etocsetstyle}\{visibletoc\}\{\csb{etocskipfirstprefix}\}%
   \{, \}\{\string\etocname\}\{\}}
%
  which defines an inline display with the comma (plus space)
  as separator. Finally, as \etoc issues |\par| automatically by default just
  before typesetting a table of contents, we used the command \csb{etocinline}
  (also known as \cs{etocnopar}) which turns off this behavior.

Here are the implementation details:

\begingroup
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
   < in the preamble >
\newcounter{visibletoc}
\renewcommand{\etocaftertitlehook}
   {\stepcounter{visibletoc}\etoctoccontentsline{visibletoc}{\thevisibletoc}}
\etocsetlevel{visibletoc}{6}
\begin{document}
   < document body >
\subsection{Surprising uses of etoc}
\begingroup
    \etocinline
    \etocsetlevel{part}{1}
    % \etocsetlevel{chapter}{1} % (no chapters in scrartcl class)
    \etocsetlevel{visibletoc}{0}
    \etocsetstyle{visibletoc}
        {\etocskipfirstprefix}{, }{{\color{niceone}\etocname}}{}
    \etocsettocstyle{}{}     % don't set any title, rules or frame or multicol!
    \etocsetnexttocdepth{visibletoc} % display only the `visibletoc' entries from .toc

Here is the numbered and linked list of all tables of contents which are
displayed within this document: \tableofcontents.
\endgroup
\end{filecontentshere}
\marginattach
\endgroup

After |\etocsetstyle{visibletoc}{..}{..}{..}{..}|, all future TOCs (not in
compatibility mode) will use the
defined style for level |0| (which is normally the level for
chapters). To keep these changes strictly local the simplest
manner is to put everything inside a group.

The \autoref{subsec:interverting} gives another use of the
shuffling of levels. 


\section[Arbitrary ``Lists Of...'', \csbhyp{etoctoccontentsline}]{%
         Arbitrary ``Lists Of...'', \csbhyp{etoctoccontentsline} and
         \csbhyp{etocimmediatetoccontentsline}}
\label{etoctoccontentsline}
\label{etocimmediatetoccontentsline}

This idea of interverting the levels is very powerful and allows
to let \etoc display lists of arbitrary things contained in the
document. All of that still
using nothing else than the |.toc| file! 
Example: imagine a document with dozens of
exercises, perhaps defined as |\newtheorem{exercise}{}[section]|. Let
us explain how to instruct \etoc to display an hyperlinked list
of all these exercises. For this we put in the preamble:
\begin{verbatim}
 \newtheorem{exerci}{}[section] 
    % the exercice number will be recoverable via \etocname: v--here--v
 \newcommand*{\exercisetotoc}{\etoctoccontentsline{exercise}{\theexerci}}
 \newenvironment{exercise}{\begin{exerci}\exercisetotoc}{\end{exerci}}
 \etocsetlevel{exercise}{6}
\end{verbatim}
In this way, \csb{etocname} will give the exercise number (but \csb{etocnumber}
will be empty). Had we used instead
\begin{verbatim}
 \newcommand*{\exercisetotoc}
    {\etoctoccontentsline{exercise}{\protect\numberline{\theexerci}}}
\end{verbatim}
the exercise number would then have been available via \csb{etocnumber}, and
\csb{etocname} would have been empty. It doesn't matter which one of the two
methods is used. The \etoc command \csb{etoctoccontentsline}|{..}{..}| is
provided as a substitute to \csa{addcon\-tentsline}|{toc}{..}{..}|: this is to
avoid the patching which is done by \ctanpkg{hyperref} to \csa{addcontentsline} in its
process of creation of bookmarks. If one wants to authorize \ctanpkg{hyperref} to create
bookmarks at a specific level \meta{n}, one can use (here with \meta{n}$=$|2|)
the starred variant \starit{etoctoccontentsline} which has an additional
argument:
\begin{verbatim}
\newcommand{\exercisetotoc}{\etoctoccontentsline*{exercise}{\theexerci}{2}}
\end{verbatim}

The counter |exerci| is already
incremented by the |exerci| theorem environment, and
provides the correct destination for the link added by package
\ctanpkg{hyperref}. The command \csa{exercisetotoc} adds for each exercise a line
to the |.toc| file, corresponding to a fictitious document
unit with name `|exercise|'. A
four-column list, including the sections, can then be
typeset with the following code:
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
  \etocsetnexttocdepth{2}     % sections are at level 1 and will show up
\begingroup
  \etocsetlevel{exercise}{2}   % but:
  \etocsetlevel{chapter}{3}    %     no chapters
  \etocsetlevel{subsection}{3} %     no subsections
  \etocsetlevel{part}{3}       %     no parts
  \etocsetstyle{exercise}{}{}  % \etocname = exercise number
    {\noindent\etocname\strut\leaders\etoctoclineleaders\hfill\etocpage\par}
    {\pagebreak[2]\vskip\baselineskip}
  \etocsetstyle{section}{}{}
    {\noindent\strut{\bfseries\large\etocnumber\hskip.5em\etocname}\par
     \nopagebreak[3]}{}
  \etocruledstyle[4]{\Large\bfseries List of the exercises}
  \setlength{\columnseprule}{.4pt}
  \tableofcontents
\endgroup
\end{filecontentshere}
\marginattach

A related command \csb{etocimmediatetoccontentsline} (and its starred version)
is also provided.  For discussion and the meaning of ``immediate'', refer to
the analogous case of \csb{etocimmediatedepthtag.toc}.

\section{The TOC as a tree}\label{tocastree}

Using \ctanpkg{tikz} and the package \ctanpkg{forest} we shall display the
table of contents of \autoref{part:styling} as a tree. The technique is to use
the \etoc modified command \toc not for typesetting, but to prepare a macro,
or rather here a \csa{toks} variable, with all the instructions to be executed
later. \textsc{Leslie Lamport}'s book has no mention whatsoever of such token
lists registers, and \LaTeX{} gives the impression to not really expect the
general user to ever hear about them (or delimited macros); this whole section
and the next are thus for advanced users.

Putting the \csb{etocnumber} and \csb{etocname} commands in \csa{treetok}
would be of no use: to which number or name would they then refer to, in a
delayed execution?

We need to store, not the macro names, but the macro contents. And also we wish
to maintain the correct \ctanpkg{hyperref} hyperlinks.
The
commands \csb{etocname}, etc\dots, are robust, it is easier to work with 
\csb{etocthelinkednumber}, \csb{etocthelinkedname}, and \csb{etocthelinkedpage}
which contain the same information in an easier accessible form.%
%
\normalmarginpar\marginpar{\footnotesize\rmfamily\itshape\RaggedRight
At \etocrelease{1.1a} the commands \csa{etocthelinkedname}, etc\dots, are
always providing an hyperlink, so it is not true that \csb{etocname}, etc\dots,
are always simply their robust variants.}

For this |forest| tree we have designed very special \etoc styles for sections
and subsections. They use a token list register called |\treetok| and a
macro |\appendtotok| whose r\^ole is to append to a given token list variable
the contents of a macro given as second argument. All this will happen in
reaction to a |\tableofcontents| command, but \emph{nothing} has yet been
printed in the process.\footnote{There is always a \csa{par}, which here is not
a problem, but can be suppressed if need be via the command \csb{etocinline} or
its synonym \csb{etocnopar}.} This is the later job of a |forest| environment
which will be given the contents of |\treetok|.



\let\appendtotok\relax

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
% \newtoks\treetok % put this (uncommented) preferably in the preamble
% \newtoks\tmptok  % (idem)
\begingroup
\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
  #1\expandafter\expandafter\expandafter
    {\expandafter\the\expandafter #1#2}}

\newcommand*\PrepareSectionNode{%
  \tmptok {\centering\bfseries}%
  \appendtotok\tmptok\etocthelinkedname
  \edef\foresttreenode{ [{\noexpand\parbox{2cm}{\the\tmptok}}}% 
}

\newcommand*{\PrepareSubsectionNode}{%
  \tmptok {\raggedright}%
  \appendtotok\tmptok\etocthelinkedname
  \edef\foresttreenode{ [{\noexpand\parbox{6cm}{\the\tmptok}}}%
}

\etocsetstyle{section}
  {\etocskipfirstprefix}
  {\appendtotok\treetok{ ]}}
  {\PrepareSectionNode \appendtotok\treetok\foresttreenode}
  {\appendtotok\treetok{ ]}}

\etocsetstyle{subsection}
  {\etocskipfirstprefix}
  {\appendtotok\treetok{ ]}}
  {\PrepareSubsectionNode \appendtotok\treetok\foresttreenode}
  {\appendtotok\treetok{ ]}}

\etocsettocstyle
    {\treetok{[{\hyperref[part:styling]{The \etoc styling commands}}}}
    {\global\appendtotok\treetok{ ]}}

% forest does not like @\the\treetok if \treetok is empty. On first latex
% run, this will be the case because the TOC style defined above will not
% have been executed, as the label {toc:overview} does not refer to a valid 
% TOC yet. So we must give a safe default value to \treetok
\treetok{[{run latex again}]}

\begin{figure}[htbp!]
\centering
     \etocsetnexttocdepth{subsection}
     \tableofcontents \label{toc:forest}\ref{toc:part:styling}
     \hypersetup{hidelinks}%
     \bracketset{action character=@}
% manual adjustments to fit the printed page
% \kern-1cm
\noindent\kern-3cm
     \begin{forest} 
                  for tree={anchor=center,child anchor=west,
                            grow'=east,draw,thick,
                            edge={draw,thick,dashed,color=teal}},
                  where={level()==1}{circle,thick,fill=blue!5,
                                    before computing xy={l=6cm}}{},
                  where={level()==2}{fill=red!5,
                                    before computing xy={l=6cm}}{},
                  rectangle, thick, fill=cyan!5, inner sep=6pt,
     @\the\treetok 
     \end{forest}
\end{figure}
\endgroup
\end{filecontentsdef}
\filecontentsexec\foo

The resulting tree has been put in a \hyperref[toc:forest]{float}, which
appears \vpageref[above]{toc:forest}.  Here is the code used for its
production: \filecontentsprintviascan\foo \marginattach

Why |\hypersetup{hidelinks}|? as explained in
\autoref{ssec:hidelinks}, I prefer the links in TOCs not to be
colorized, nor framed, so this document inserts a command
%\csa{hypersetup}\texttt{\{hidelinks\}} % ok pour hyphénation
%\csa{hypersetup}|{hidelinks}| % pas ok
|\hypersetup{hidelinks}| % ok maintenant 12 octobre 2013
 in the |.toc| file. But at the time the
|\treetok| contents are unpacked the |\hyperlink| commands
originating in
|\etocthelinkedname|, etc\dots{} will be executed in the normal
environment for links (which, in this document, is to colorize
them). Rather than having \etoc's code try to guess what the current ``style''
for links is (a concept not really provided by \ctanpkg{hyperref} it
seems) and store it in |\etocthelinkedname|, etc\dots, I opted for
the simpler solution to leave it up to the user to recreate
whatever conditions are desired. So here  it is necessary to re-issue
|\hypersetup{hidelinks}| in the |figure| environment.

There are some other examples in this documentation where
|\tableofcontents| is used to prepare material for later
typesetting:
\begin{itemize}
\item printing the statistics at the start of each Part (see
  \autoref{ssec:statistics}) is done using save boxes (so the problem of the
  appearance of the links does not arise then).
\item typesetting of the TOC as a table without benefiting from
  \csb{etocglobaldefs} (see \autoref{ssec:tocastableold}).
\item and the examples in the next section.
\end{itemize}


\section{The TOC as a molecule}\label{sec:molecule}

It is also possible to construct a TOC tree obeying the TikZ
syntax for trees: but this is a more complicated task for the
\etoc line styles for reasons related to the way braces are
handled by \TeX{} (they need, when filling up the token list to be
always balanced at each step, else complicated tricks must be
employed.)

The simplest strategy is to allocate a token list (or use a macro) for each
level used: we may need a \csa{parttok}, a \csa{chaptertok}, a
\csa{sectiontok} and a \csa{subsectiontok}, to help in the task of filling
up the total \csa{treetok}. As we are interested here in the table of
contents of this (or another) document part, only a \csa{sectiontok} and a
\csa{subsectiontok} will be needed.

\let\appendtotok\relax
\let\treenode\relax
\let\appendchildtree\relax
\let\preparetreenode\relax
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
% \newtoks\treetok % put this (uncommented) preferably in the preamble
% \newtoks\subsectiontok 
% \newtoks\subsubsectiontok
% Attention: this code has been prepared only for subsections
% and subsubsections.

\newcommand*{\treenode}{}% only to make sure our \edef's do not overwrite
                         % an existing command

% expands 2nd argument (macro) and appends it to 1st argument (toks)
\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
  #1\expandafter\expandafter\expandafter
    {\expandafter\the\expandafter #1#2}}

% appends 2nd argument contents (toks) as child of first argument (toks)
\newcommand*{\appendchildtree}[2]{% token list t1 becomes: t1 child {t2}
   \edef\tmp{\the#1 child {\the#2}}%
   #1\expandafter{\tmp}%
}
% prepare the (hyperlinked) number in the "node (number)" shape
\newcommand*{\preparetreenode}{%
  \tmptok\expandafter{\etocthelinkednumber}% expanded once (needed)
  \edef\treenode{node {\the\tmptok}}%
}

\etocsetstyle{subsection}
  {\etocskipfirstprefix}
  {\appendchildtree\treetok\subsectiontok}
  {\preparetreenode
   \subsectiontok\expandafter{\treenode}}
  {\appendchildtree\treetok\subsectiontok}

\etocsetstyle{subsubsection}
  {\etocskipfirstprefix}
  {\appendchildtree\subsectiontok\subsubsectiontok}
  {\preparetreenode
   \subsubsectiontok\expandafter{\treenode}}
  {\appendchildtree\subsectiontok\subsubsectiontok}

\etocsettocstyle
  {\treetok{\node {\hyperref[sec:linestyles]{Line styles}}}}
  {\global\appendtotok\treetok{ ;}}

\centeredline{% from package centeredline (limits scope of \hypersetup)
   \etocsetnexttocdepth{subsubsection}
   \etocinline\tableofcontents \label{toc:molecule} \ref{toc:tocstyle}
   \hypersetup{hidelinks}% 
   \begin{tikzpicture}
              [grow cyclic,
               level 1/.style={level distance=4cm,sibling angle=72},
               level 2/.style={level distance=2cm,sibling angle=60},
               every node/.style={ball color=red,circle,text=SkyBlue},
               edge from parent path={[dashed,very thick,color=cyan]
                           (\tikzparentnode) --(\tikzchildnode)}]
   \the\treetok
   \end{tikzpicture}%
}
\end{filecontentshere}
\marginattach

\filecontentsexec\filecontentsheremacro



The |\tableofcontents| command is executed prior to the |tikzpicture|
environment which will actually typeset it via insertion of the accumulated
data in the \csa{toks} register \csa{treetok}.  This
\hyperref[toc:molecule]{TikZ TOC} is fully hyperlinked, like the previous
\hyperref[toc:forest]{Forest TOC}.

% Mercredi 01 mars 2023 à 23:27:29
% arrrrrrgggghhh
% desperate attempt to avoid an annoying varioref "may loop" error.
% at last minute, arose from a suppression of a paragraph a few
% dozen pages earlier.
% [76]

% ! Package varioref Error: \vref or \vpageref at page boundary 65-66 (may loop).

% See the varioref package documentation for explanation.
% Type  H <return>  for immediate help.
%  ...                                              
                                                  
% l.6114 appears \vpageref{toc:mindmap}

% mais ça n'a pas suffit.  Bon 10 minutes de perdues je vais déplacer la ligne.

\enlargethispage{3\baselineskip}
Another example:

\etocsettocstyle
  {\treetok{\node {\autoref{sec:tocstyle}}}}
  {\global\appendtotok\treetok{ ;}}

\etocsetnexttocdepth {subsubsection}
\tableofcontents \ref{toc:tocstyle}

\centeredline{%  
\hypersetup{hidelinks}
    \begin{tikzpicture}
              [grow cyclic,
               level 1/.style={level distance=2.5cm,sibling angle=60},
               level 2/.style={level distance=1cm,sibling angle=45},
               every node/.style={ball color=red!50,circle,text=black},
               edge from parent path={[very thick,color=cyan]
                       (\tikzparentnode) --(\tikzchildnode)}] 
     \the\treetok
   \end{tikzpicture}
}%
%
The above is the fully hyperlinked table of contents of
\autoref{sec:tocstyle}.

\section{The TOC as a TikZ mind map}
\label{sec:mindmap}

This is in the same spirit as the ``molecule'' example. The use of the \eTeX{}
primitive \csa{unexpanded} will simplify the code.%
%


\let\partnode\relax
\let\childnode\relax
\let\appendtotok\relax
\let\appendchildtree\relax
\expandafter\let\csname c@partco\endcsname\relax

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
% \newtoks\treetok % done in preamble
% \newtoks\parttok
\newcommand*\partnode {}  % check with \newcommand we will not overwrite something
\newcommand*\childnode {}

\newcommand*\tmprotate {} % (idem)
\newcommand*\tmpoption {} %
\newcommand*\tmpstuff  {} %

\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
   #1\expandafter\expandafter\expandafter{\expandafter\the\expandafter #1#2}}

\newcommand*{\appendchildtree}[3]{% 
% this is to construct "t1 child [#3]{t2}" from #1=t1 and #2=t2
% t1 and t2 are two toks variable (not macros)
% #3 = for example teal!60
   \edef\tmpstuff {\the#1 child [#3]{\the#2}}%
   #1\expandafter {\tmpstuff }%
}

\newcounter{partco}

% 1,2,3,4,5,... -> 1,2,3,1,2,3,1,2,3
\def\pseudomodthree #1{\numexpr #1 + 3 - 3*((#1+1)/3)\relax}

\etocsetstyle{part}
  {\etocskipfirstprefix}
% This updates the global tree with the data  from the previous
% part and all its children sections. Moved here because for some parts the
% sections are not displayed due to depth tags.
  {\ifnum\value{partco}=3
     \appendchildtree\treetok\parttok {branch color= green!50,level distance=10cm}%
   \else
\ifcase\pseudomodthree{\value{partco}}%
   \or \appendchildtree\treetok\parttok {branch color= teal!30}%   first
   \or \appendchildtree\treetok\parttok {branch color= yellow!80}% second
   \else\appendchildtree\treetok\parttok {branch color= green!50}% third and next ...
   \fi\fi
   }
  {\stepcounter{partco}%
% customize manually  some TikZ set-up (should be done inside the TikZ thing I guess)
   \def\tmpoption {}%
   \def\tmprotate {}% first
   %\ifnum\value{partco}=5 \def\tmprotate {[counterclockwise from =-40]}\fi
   %\ifnum\value{partco}=8 \def\tmprotate {[counterclockwise from =-50]}\fi
% define the part node
   \edef\partnode{node \tmpoption 
                  {\unexpanded\expandafter{\etocthelinkednumber}. 
                   \unexpanded\expandafter{\etocthelinkedname}}\tmprotate }%
% this is a starting point which will be filled it by the section children
   \parttok\expandafter{\partnode}}
  {\ifcase\pseudomodthree{\value{partco}}%
   \or \appendchildtree\treetok\parttok {branch color= teal!60}%   first
   \or \appendchildtree\treetok\parttok {branch color= yellow!80}% second
   \else\appendchildtree\treetok\parttok {branch color= green!50}% third and next ...
   \fi
   }

\etocsetstyle{section}
  {}
  {}
  {% define the section node
   \edef\childnode{child {node {\unexpanded\expandafter{\etocthelinkednumber} 
                        \unexpanded\expandafter{\etocthelinkedname}}}}%
   % append it to the current \parttok
   \appendtotok\parttok\childnode
    }
  {}

\etocsettocstyle
  {\setcounter{partco}{0}%
   \treetok{\node [root concept]{\textbf{The \etoc documentation}}}}
  {\global\appendtotok\treetok{ ;}}
% The \global above is mandatory because etoc always typesets TOC inside a group

\etocsetnexttocdepth{section}
% use of depth tags to cut out sections for most parts, the sections
% are too numerous to fit well with the circular growth
\etocsettagdepth {preamble}   {part}
\etocsettagdepth {overview}   {part}
\etocsettagdepth {styling}    {part}
\etocsettagdepth {control}    {part}
\etocsettagdepth {examples}   {part}
\etocsettagdepth {advanced}   {part}
\etocsettagdepth {etocandworld}{part}
\etocsettagdepth {code}       {section}

\tikzset{
    branch color/.style={
        concept color=#1!white,
        every child/.append style={concept color=#1!white!30!white, font=\normalsize},
    }
}%

\begin{figure}[htbp!]
\etocobeydepthtags % obey the depth tags restrictions (which is default anyhow)
\tableofcontents\label{toc:mindmap}%
\centeredline{\resizebox{.85\paperwidth}{!}%
{\begin{tikzpicture}[mindmap,
                    grow cyclic, 
                    text width=2cm, 
                    align=flush center, 
                    nodes={concept}, 
                    concept color=orange!60,
                    root concept/.append style={text width=4cm, font=\Large},
   level 1/.append style={level distance=5cm,sibling angle=45, text width=3cm},
   level 2/.append style={level distance=7cm,sibling angle=30, text width=3cm},
   level 1 concept/.append style={font=\normalsize},
                    ]
\the\treetok
\end{tikzpicture}}}
\end{figure}
\end{filecontentsdef}
\filecontentsexec\foo

It is difficult to get everything to fit on one page. However \csa{resizebox}
comes to the rescue. And it preserves hyperlinks. Nevertheless for this
example I excluded some sections from the display, using the technique of the
\etoc \hyperref[etocdepthtag.toc]{depth tags}.

%  The fully hyperlinked TOC
% appears \vpageref{toc:mindmap}.

\filecontentsprintviascan\foo
\marginattach

The fully hyperlinked TOC appears \vpageref{toc:mindmap}.

An interesting alternative is to use \etoc rather to convert the entire TOC
into a TikZ tree (perhaps excluding some parts) and print it out to a file
from which it can be recovered and manipulated directly by the author of the
document. Things written to the |.log| file get broken into lines. Here is a
technique to get non-broken output. Once the \csa{treetok} has been computed
by \etoc (as in the \hyperref[toc:molecule]{molecule} example, or the current
example), this demo will write it out to file with extension
|.toctree|:
\begin{verbatim}
  \newwrite\TOCasTree
  \immediate\openout\TOCasTree=\jobname.toctree
  \immediate\write\TOCasTree{\the\treetok}%
\end{verbatim}


\section{The TOC as a (long) table}
\label{sec:tocastable}

% With release \etocrelease{1.08} it is easier to typeset a TOC as a table.
It is possible to open a \texttt{tabular} (or \texttt{longtable}) in the title part of the TOC
(first argument to \csb{etocsettocstyle}) and then close it after the contents
(second argument to \csb{etocsettocstyle}), and specify in the line styles how
to use the tabulation |&| and tabular end of row |\\|.

But there are some conditions and a few caveats:
\begin{enumerate}
\item it is \textbf{mandatory} to issue \csb{etocglobaldefs} for \etoc's
  definitions of  \csb{etocname} et al. to have global scope, i.e. not be
  extinguished on encountering a |&|,
\item it is impossible to start one of the \meta{start}, \meta{prefix},
  \meta{contents} or \meta{finish} specification with a sole |\hline|,
  \emph{i.e.} one not preceded by a |\\|,
 % (it is however possible to put
 %  |\\| at the end of \meta{prefix} and the |\hline| at the start of
 %  \meta{contents}).
\item as is explained next, it is recommended to put the
  |\\| at the start of the \meta{prefix} or \meta{contents}
  specifications in order to close the \emph{previous} row, rather
  that at the end with the idea to close the \emph{current} row;
  and when the TOC is a partial one (a \csa{localtableofcontents}) this
  is (in almost all situations) mandatory.
\end{enumerate}

Here is an example of a TOC as a |longtable|. Yes this is only \emph{one} table!
The code follows.

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begingroup
\etocglobaldefs % necessary for \etocname etc... to survive &
\makeatletter
% hack into longtable \hline to avoid annoying (here) stray lines at top
\def\LT@@hline{%
  \ifx\@let@token\hline
    \global\let\@gtempa\@gobble
    \global\let\@gtempb\@firstofone %%% ADDED
    \gdef\LT@sep{\penalty-\@medpenalty\vskip\doublerulesep}%
  \else
    \global\let\@gtempa\@empty 
    \global\let\@gtempb\@gobble     %%% ADDED
    \gdef\LT@sep{\penalty-\@lowpenalty\vskip-\arrayrulewidth}%
  \fi
  \ifnum0=`{\fi}%
  \multispan\LT@cols
     \unskip\leaders\hrule\@height\arrayrulewidth\hfill\cr
  \@gtempb{%                        %%% ADDED
  \noalign{\LT@sep}%
  \multispan\LT@cols
     \unskip\leaders\hrule\@height\arrayrulewidth\hfill\cr
  \noalign{\penalty\@M}%
  }%                                %%% ADDED
  \@gtempa}
\makeatother

% observe the locations of the \\
\etocsetstyle{part}
  {}
  {}
  {\\\hline\multicolumn{3}{c}{\bfseries\vrule height6ex depth3ex width0pt
                              \makebox[0pt]{\etocifnumbered{\etocnumber. }{}\etocname}}}
  {}

\etocsetstyle{section}
  {}
  {\etociffirst{\\\hline}{\\}}
  {\etocnumber&\etocname &\etocpage }
  {}

\etocsetstyle{subsection}
  {}
  {\\}
  {&\makebox[1cm][c]{\etocnumber}%
    \parbox[t]{\dimexpr6cm-\tabcolsep\relax}{\sloppy\itshape\etocname\strut}%
   &\itshape\etocpage }
  {}

\etocsettocstyle
    {\hypersetup{hidelinks}%
     \begin{longtable}{|>{\bfseries}c|p{7cm}|r|}
     \hline
     \multicolumn{3}{|c|}{\Large\bfseries\strut\strut TABLE OF CONTENTS}%
     }
    {\\\hline\end{longtable}}

\etocsetnexttocdepth {subsection}

\tableofcontents
\endgroup
\end{filecontentsdef}

\filecontentsexec\foo

\filecontentsprintviascan\foo
\marginattach

Examining the code above the reader will wonder why the |\\| are
always given first in \meta{prefix+contents} and not, as is more
intuitive, rather last. In some favorable cases (but almost never
for local tables of contents) one may indeed construct
TOC-as-tables with the |\\| located at the end of the style
specifications. The problem in the previous example was with the
positioning of the |\hline|'s.

Due to technical aspects of how \TeX{} constructs alignments any
definition or assignment done after an |\\| starts a new row, and
thus makes |\hline| an illegal token (this shows as a |misplaced
\noalign| error.) Not only does \etoc have to do such definitions
to construct \csb{etocname} etc..., it is furthermore the case that
some packages put things in the |.toc| file and as a result there
is never any guarantee that between two \csa{contentsline} there
will not be such a token like |\relax| which in the contexts of
alignments forces \TeX{} to start a cell and thus makes it
impossible then to insert an |\hline|.

The safest way is thus to start with an |\\| each line style
specification in order to close the \emph{previous} table row. We
had a little problem with the fact that we wanted parts not only
to have a rule above them (easy, they do |\\\hline|) but also
below them: after each part there is a section, and it is these
sections which are used to insert the missing |\hline|
(this is done with the help of the \csb{etociffirst}
conditional). 


Last technical note: because we put the |\\\hline| inside the branches, there
was no need to employ the expandable variants \csb{etocxiffirst} and
\csb{etocxifnumbered}.

For the hardliner's old way see \autoref{ssec:tocastableold}.

Here is also a much simpler example. It is a local table of
contents.

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\begin{center}
\etocsetstyle{section}
             {}
             {\etociffirst{\\\hline\hline}{\\\hline}}
             {\etocname & \etocnumber & \etocpage }
             {}

\etocsettocstyle
   {\hypersetup{hidelinks}\begin{tabular}{|>{\RaggedRight}p{4.5cm}|c|c|}\hline
    \multicolumn{1}{|c|}{\bfseries Section title}&
    \bfseries number&
    \bfseries page}
   {\\\hline\end{tabular}}

\etocglobaldefs % MANDATORY !!
\etocsetnexttocdepth{1}

\tableofcontents\ref{toc:overview}
\end{center}
\end{filecontentsdef}

\filecontentsexec\foo

\filecontentsprintviascan\foo
\marginattach

\section{A TOC self-adjusting widths for its typesetting}
\label{sec:thirdexampleextra}

This is a continuation of \autoref{sec:thirdexample}. The goal is to adjust
automatically the ``numwidths'' used for typesetting the unit numbers in the
(local) tables of contents.
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\makeatletter
\newcommand*\TOCcompute@numwidths [2]{% #1=empty/"local", #2=minimal indent
  \begingroup
    \def\TOCnumwidthB {0pt}%
    \def\TOCnumwidthC {0pt}%
    \def\TOCnumwidthD {0pt}%
    \def\TOCnumwidthE {0pt}%
    \def\TOCnumwidthF {0pt}%
    \def\TOCnumwidthG {0pt}%
    \etocsetstyle{part}{}{}{}{}%
    \etocsetstyle{chapter}{}
      {\setbox0\hbox{\bfseries\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthB\edef\TOCnumwidthB{\the\wd0}\fi}{}%
    \etocsetstyle{section}{}
      {\setbox0\hbox{\bfseries\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthC\edef\TOCnumwidthC{\the\wd0}\fi}{}%
    \etocsetstyle{subsection}{}
      {\setbox0\hbox{\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthD\edef\TOCnumwidthD{\the\wd0}\fi}{}%
    \etocsetstyle{subsubsection}{}
      {\setbox0\hbox{\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthE\edef\TOCnumwidthE{\the\wd0}\fi}{}%
    \etocsetstyle{paragraph}{}
      {\setbox0\hbox{\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthF\edef\TOCnumwidthF{\the\wd0}\fi}{}%
    \etocsetstyle{subparagraph}{}
      {\setbox0\hbox{\etocthenumber\kern#2}}
      {\ifdim\wd0>\TOCnumwidthG\edef\TOCnumwidthG{\the\wd0}\fi}{}%
    %
    \etocsettocstyle
     {}
     {\global\let\TOCnumwidthB\TOCnumwidthB
      \global\let\TOCnumwidthC\TOCnumwidthC
      \global\let\TOCnumwidthD\TOCnumwidthD
      \global\let\TOCnumwidthE\TOCnumwidthE
      \global\let\TOCnumwidthF\TOCnumwidthF
      \global\let\TOCnumwidthG\TOCnumwidthG
     }% make the found maximal widths have global scope
    \etocnopar
    \csname #1tableofcontents\endcsname
\typeout{Next TOCs will use \TOCnumwidthB\space for chapter number width}%
\typeout{Next TOCs will use \TOCnumwidthC\space for section number width}%
\typeout{Next TOCs will use \TOCnumwidthD\space for subsection number width}%
\typeout{Next TOCs will use \TOCnumwidthE\space for subsubsection number width}%
\typeout{Next TOCs will use \TOCnumwidthF\space for paragraph number width}%
\typeout{Next TOCs will use \TOCnumwidthG\space for subparagraph number width}%
  \endgroup % matches \begingroup at start of definition
}%
\newcommand*\TOCcomputenumwidths [1][0.5em]{%
  \TOCcompute@numwidths {}{#1}%
}%
\newcommand*\TOCcomputelocalnumwidths [1][0.5em]{%
  \TOCcompute@numwidths {local}{#1}%
}%
\makeatother
\end{filecontentshere}
\marginattach

The optional parameter to \csa{TOCcomputenumwidths} specifies the minimal
indent. In case nothing is numbered you may wish a higher value than |0.5em|.
For each local table of contents to have its own width computations, the macro
\csa{TOCcomputelocalnumwidths} is provided. As the code makes global
assignments, either use (once) \csa{TOCcomputenumwidths} or do
\csa{TOCcomputelocalnumwidths} for each local table of contents.
\begin{verbatim}
  \TOCcomputelocalnumwidths  % may use optional argument to replace 0.5em
  \localtableofcontents
\end{verbatim}
Notes:
\begin{enumerate}[nosep]
\item naturally these are only suggestions. For example one could put
  everything in single macros \csa{TOCtoc} and \csa{TOClocaltoc} to
  simultaneously compute the numwidths and then typeset the (local) table of
  contents.
\item if you want to adjust the |tocdepth| recall from
  \autoref{ssec:bookmarksdepth} that it influences \ctanpkg{hyperref} hence you may
  need to use a group |\begingroup...\endgroup|. Or, one can use
  \csb{etocsetnexttocdepth}\marg{level} but (with the code as here) this must
  then be issued twice, once for \csa{TOCcomputelocalnumwidths}, once for
  \csa{localtableofcontents}.
\item the bold font serves above for both chapter and section numwidth
  computations, but the code from \autoref{sec:thirdexample} uses |\bfseries|
  only in local TOCs. Thus the \csa{TOCcomputenumwidth} will set the parameter
  \csa{TOCnumwidthC} to a value slightly larger than needed in the main TOC.
  Hence the section style in \csa{TOCcompute@numwidths} should possibly insert
  the |\bfseries| in the box only after testing for the optional parameter
  |local|.
\end{enumerate}



\section{Interverting the levels}
\label{subsec:interverting}

Let us display and count all subsections occurring in this
document (see \autoref{part:surprising} for other uses of
this technique):  
\begin{verbatim}
\etocsetnexttocdepth{2}
\begingroup
\etocsetlevel{part}{3}
\etocsetlevel{section}{3}
\etocsetstyle{subsection}
    {\small\begin{enumerate}[itemsep=0pt,label=,leftmargin=0pt]}
    {\normalfont\bfseries\item}
    {\roman{enumi}. \mdseries\etocname{} (\etocnumber, p.~\etocpage)}
    {\end{enumerate}}
\renewcommand{\etoccolumnsep}{2.75em}
\renewcommand{\columnseprule}{1pt}
\etocmulticol[3]{\subsection{All subsections of this document}}
\endgroup
\end{verbatim}

\etocsetnexttocdepth{2}

\begingroup
\etocdefaultlines
\etocclasstocstyle
\etocsetlevel{book}{3}
\etocsetlevel{part}{3}
\etocsetlevel{chapter}{3}
\etocsetlevel{section}{3}
\etocsetstyle{subsection}{\small
\begin{enumerate}[itemsep=0pt,label=,leftmargin=0pt]}
{\normalfont\bfseries\item}
{\roman{enumi}. \mdseries\etocname{} (\etocnumber, p.~\etocpage)}
{\end{enumerate}}

\renewcommand{\etoccolumnsep}{2.75em}
\renewcommand{\columnseprule}{1pt}

%%\etocmarkbothnouc{List of all subsections}
%% le mark (\markright) est fait par \subsection

\etocmulticol[3]{\subsection{All subsections of this document}\label{toc:allsubsections}}

\endgroup

\section{Displaying statistics}\label{ssec:statistics}

Each part of this document starts with a paragraph telling how many
sections and subsections it has. Well, each one of this paragraph is a
table of contents! We designed a macro \csa{thispartstats} to do that.
It uses ``storage'' boxes to keep the information about the first and
last section or subsection. Using boxes is the simplest manner to
encapsulate the \ctanpkg{hyperref} link for later use (whether there is one or
none). However, one cannot modify then the font or the color.
%  (using the
% \TeX{} primitive \csa{setbox} rather than the \LaTeX{} \csa{sbox} would
% allow to change the color of the un-boxed saved box)
If such a need
arises, one must switch from using boxes to using macros, and store the
\ctanpkg{hyperref} data for later use as was done in the code presented in
\autoref{sec:molecule}. We present also this second method.

But first, the code of \csa{thispartstats}:\par
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\newsavebox\firstnamei  \newsavebox\firstnumberi
\newsavebox\lastnamei   \newsavebox\lastnumberi
\newsavebox\firstnameii \newsavebox\firstnumberii
\newsavebox\lastnameii  \newsavebox\lastnumberii
\newcounter{mycounti}   \newcounter{mycountii}
\newcommand*{\thispartstatsauxi}{} \newcommand*{\thispartstatsauxii}{}
\newcommand*{\oldtocdepth}{}
\newcommand*{\thispartstats}{%
  \setcounter{mycounti}{0}%
  \setcounter{mycountii}{0}%
  \def\thispartstatsauxi{%
         \sbox{\firstnamei}{\footnotesize\etocname}%
         \sbox{\firstnumberi}{\footnotesize\etocnumber}%
         \def\thispartstatsauxi{}}%
  \def\thispartstatsauxii{%
         \sbox{\firstnameii}{\footnotesize\etocname}%
         \sbox{\firstnumberii}{\footnotesize\etocnumber}%
         \def\thispartstatsauxii{}}%
  \begingroup
  \etocsetstyle{subsection} {} {}
    {\thispartstatsauxii
     \stepcounter{mycountii}%
     \sbox{\lastnameii}{\footnotesize\etocname}%
     \sbox{\lastnumberii}{\footnotesize\etocnumber}} {}%
  \etocsetstyle{section} {} {}
    {\thispartstatsauxi
     \stepcounter{mycounti}%
     \sbox{\lastnamei}{\footnotesize\etocname}%
     \sbox{\lastnumberi}{\footnotesize\etocnumber}}
    {{\footnotesize\itshape
    Here are some statistics for this part: it contains \arabic{mycounti}
    section\ifnum\value{mycounti}>1 s\fi{} and \arabic{mycountii}
    subsection\ifnum\value{mycountii}>1 s\fi. The name of the first section is
    \unhbox\firstnamei{} and the corresponding number is \unhbox\firstnumberi. 
    The name of the last section is \unhbox\lastnamei{} and its number is
    \unhbox\lastnumberi. The name of the first subsection is \unhbox\firstnameii{}
    and the corresponding number is \unhbox\firstnumberii. The name of the last
    subsection is \unhbox\lastnameii{} and its number is \unhbox\lastnumberii.\par}}%
  \etocinline % cancels the automatic \par automatically before the TOC
  \etocsettocstyle {}{}
  \etocsetnexttocdepth{2}%
  \localtableofcontents  % to be used at the top level of a Part.
  \endgroup
}
\end{filecontentshere}
\marginattach

And now, the variant with macros rather than boxes (this variant as it
stands here is for using within a section).
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\makeatletter
\newcommand*\firstsubname   {}  \newcommand*\lastsubname    {}
\newcommand*\firstsubnumber {}  \newcommand*\lastsubnumber  {}
\newcommand*\thisspecialstatsaux{}
\newcommand*{\thisspecialstats}{%
  \setcounter{mycounti}{0}%
  \def\thisspecialstatsaux{%
         \let\firstsubname\etocthelinkedname
         \let\firstsubnumber\etocthelinkednumber
         \def\thisspecialstatsaux{}}
  \begingroup
  \etocsetstyle{subsection} {} {}
    {\thisspecialstatsaux
     \stepcounter{mycounti}%
     \let\lastsubname\etocthelinkedname
     \let\lastsubnumber\etocthelinkednumber }
    {Here are some statistics for this section. It contains \arabic{mycounti}
      subsections. The name of its first is \emph{\firstsubname{}} and the 
      corresponding number is {\firstsubnumber}. The name of the last 
      subsection is \emph{\lastsubname{}} and its number is {\lastsubnumber}.}% 
   \etocsettocstyle {}{}
   \etocinline
   \etocsetnexttocdepth {1}%
   \localtableofcontents % to be used within a section
  \endgroup
}
\makeatother
\end{filecontentshere}
\marginattach

\section{Using depth tags}
\label{sec:tocwithdepthtags}

We want a TOC which will have a heading for each |\part| (except
the last part with the code source, which we decide not to
include), and will additionally open up \autoref{sec:tocstyle}
up to paragraphs. To achieve this we added to this source various
\csb{etocdepthtag.toc} commands, and it remains now to set the
levels for each tag using \csb{etocsettagdepth} (this was used
earlier in this document, in \autoref{sec:secondexample}, within a
group hence it did not affect the other tables of contents).

However, the package line styles do not display paragraphs, and the
standard line styles of the document class give too much vertical
spacing (in this context) when displaying a Part heading in the TOC. So
we cook up our own, quickly designed line styles, in the style of
\autoref{sec:firstexample} (but with a way to put page numbers on the
right which is more like the method used by \LaTeX2e's
|\@dottedtocline|; and multi-line headings now leave empty the area
underneath the numbers contrarily to the code from
\autoref{sec:firstexample}). And after a few minutes for choosing
lengths (now that this has been done once, it can be recycled easily) we
get:

\begin{filecontentsdef}{etocsnippet-\snippetno.tex}{\foo}
\etocsetnexttocdepth {all}
\begingroup 
\parindent 0pt \leftskip 0cm \rightskip .75cm \parfillskip -\rightskip
\newcommand*{\EndParWithPagenoInMargin}
    {\nobreak\hfill
     \makebox[0.75cm][r]{\mdseries\normalsize\etocpage}%
     \par}
\renewcommand*\etoctoclineleaders
    {\hbox{\normalfont\normalsize\hbox to .75ex {\hss.\hss}}}
\newcommand*{\EndParWithPagenoInMarginAndLeaders}
    {\nobreak\leaders\etoctoclineleaders\hfill
     \makebox[0.75cm][r]{\mdseries\normalsize\etocpage}%
     \par }
\etocsetstyle {part}
              {}
              {\leavevmode\leftskip 1cm\relax}
              {\bfseries\large\llap{\makebox[1cm][r]{\etocnumber\ \ }}%
               \etocname\EndParWithPagenoInMargin\smallskip}
              {}
\etocsetstyle {section}
              {}
              {\leavevmode\leftskip 1.75cm\relax}
              {\bfseries\normalsize\llap{\makebox[.75cm][l]{\etocnumber}}%
               \etocname\EndParWithPagenoInMarginAndLeaders}
              {}
\etocsetstyle {subsection}
              {}
              {\leavevmode\leftskip 2.75cm\relax }
              {\mdseries\normalsize\llap{\makebox[1cm][l]{\etocnumber}}%
               \etocname\EndParWithPagenoInMarginAndLeaders}
              {}
\etocsetstyle {subsubsection}
              {}
              {\leavevmode\leftskip 4cm\relax }
              {\mdseries\normalsize\llap{\makebox[1.25cm][l]{\etocnumber}}%
               \etocname\EndParWithPagenoInMarginAndLeaders}
              {}
\etocsetstyle {paragraph}
              {}
              {\leavevmode\leftskip 5.5cm\relax }
              {\mdseries\normalsize\llap{\makebox[1.5cm][l]{\etocnumber}}%
               \etocname\EndParWithPagenoInMarginAndLeaders}
              {}
\etocsettagdepth {preamble}    {all}
\etocsettagdepth {overview}    {part}
\etocsettagdepth {styling}     {subsection}
\etocsettagdepth {control}     {subsubsection}
\etocsettagdepth {examples}    {part}
\etocsettagdepth {advanced}    {part}
\etocsettagdepth {etocandworld}{all}
\etocsettagdepth {code}        {all}
\renewcommand\etoctoprule {\hrule height 3pt\relax }
\renewcommand\etoctoprulecolorcmd {\color{blue}}
\renewcommand\etocaftercontentshook 
   {\medskip\begingroup \color{blue}\hrule height 3pt \endgroup }
\etocruledstyle [1]{\Large\bfseries 
                    \fbox{\makebox[8cm]{A TOC using depth tags}}}
\sloppy
\etocobeydepthtags % let's not forget to activate this (default anyhow)
\tableofcontents
\endgroup
\end{filecontentsdef}

\filecontentsexec\foo

\filecontentsprintviascan\foo
\marginattach

\section{Sections styling subsections}
\label{sec:anothercompatadvanced}

Here is a subtler example where one only marginally modifies the sections
(adding color to the number, removing the \ctanpkg{hyperref} link, changing
the color for one specific section) but let them decide almost one by one
of the style which will be followed by their subsections.  Furthermore one
configures some sections to decide they will not display subsections at all or
only count how many there are!

% modified for 1.2 doc to make the argument optional and update number
% of exceptional section

\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\makeatletter
\newcommand*{\MyQuasiStandardTOC}[2][]{%
  % #1 is an optional "\ref{somelabeltoanothertoc}"
  % #2 is the number of some exceptional section
  \begingroup
  \etocsetstyle{section}
    {}
    {\etociffirst{% Suppress display of subsections for the first section!
                  \etocsetlevel{subsection}{6}}
                 {\etocsetlevel{subsection}{2}}%
     \ifnum\etocthenumber=#2 % Handle especially section number #2 ! 
      \etocsetstyle{subsection}
        {\def\foo{}\par\nopagebreak\begingroup
         \leftskip2em \rightskip\@tocrmarg
         \parfillskip \@flushglue 
         \parindent 0pt
         \normalfont\normalsize\rmfamily\itshape
         \etocskipfirstprefix}
        {\allowbreak\,--\,}
        {\edef\foo{\the\numexpr\foo+1}\etocname\ \textup{(\etocnumber)}}
        {.\par \upshape My AI counted circa \foo\space subsections,
                        was it right?\par\endgroup}%
     \else
      \ifnum\etocthenumber>#2 % Only count subsections in those sections !
        \etocsetstyle{subsection}
        {\def\foo{}}%
        {\edef\foo{\the\numexpr\foo+1}}%
        {}%
        {\leftskip2em \emph{There are \foo\space subsections here,
                      but I will need payment to display them.}\par}%
      \else
        \etocsetstyle{subsection}
        {}%
        {}%
        {\l@subsection{\numberline{\etocnumber}\etocname}{\etocpage}}%
        {}%
      \fi
    \fi
    }%
    {% Display in a special color the number of the special section!
     \l@section{\numberline{{\ifnum\etocthenumber=#2 
                             \color{red}\else\color{cyan}\fi\etocthenumber}}%
                \etociffirst{\etocname\space (SUBSECTIONS SKIPPED)}{\etocname}}
               {\etocpage}}%
    {}%
  \etocclasstocstyle % will use the ambient document class
     % special KOMA-script customization as this document uses scrartcl
     % and we need to enlarge numwidth for some subsections
     \DeclareTOCStyleEntry[numwidth=2em,indent=0pt]{tocline}{section}
     \DeclareTOCStyleEntry[numwidth=2.5em,indent=2em]{tocline}{subsection}
  \etocsetnexttocdepth {subsection}%
  \tableofcontents #1
  \endgroup
}
\makeatother
\end{filecontentshere}

\marginattach
\filecontentsexec\filecontentsheremacro

The optional argument stands for a suitable |\ref|, see \autoref{sec:labeling}. 
Here is what
\begin{verbatim}
\MyQuasiStandardTOC[\ref{toc:part:styling}]{11}% treat especially section 11
\end{verbatim}
gives:
\MyQuasiStandardTOC[\ref{toc:part:styling}]{11}%

\vskip.5\baselineskip

The page heading (on the page where this TOC appears) may have been modified
as is expected from usage of \csb{etocclasstocstyle} in the code.

Sections are printed exactly as in the default, \emph{except} that a special
section number is displayed especially and that its subsections are then
displayed inline! And other sections may only count subsections or
ignore them altogether!

Note: for this code to work the macro \csa{thesection} \emph{must} not have
been modified from its default which produces simply arabic digits.  In other
terms it must be usable as \TeX{} number denotation.  Typically this would
fail if we were handling subsections as their number in the |.toc| file will
be typically something like |3.7| which does not work in a \TeX{} integer-only
context.  But it is possible to use a counter and configure the line styles to
increment it, and use its value.



\section{The TOC as a (long) table (alternative)}
\label{ssec:tocastableold}

Due to, among other things, the fact that alignment cells create and close
groups, and that by default definitions of \csb{etocname}, \csb{etocnumber},
\csb{etocpage} made by \etoc are local, it was not easy to typeset a TOC as
table with \etoc, prior to release to the addition of \csb{etocglobaldefs} at
\etocrelease{1.08}. 

Not only \csb{etocname} etc... caused a problem, but also the basic
redefinition of \csa{contentsline} was made by \etoc only after the
first argument to \csb{etocsettocstyle} had been executed, hence if this
argument were to open a tabular, the \etoc redefinition of
\csa{contentsline} would be done in the first cell of the first row and
get lost thereafter.

Thus one had to resort to the technique explained in \autoref{tocastree}
of using the execution of \csa{tableofcontents} as a way to store data
which was then displayed later.

For the record, here is how the TOC from \autoref{sec:tocastable} was
coded in the old days.%
%
\footnote{At release \etocrelease{1.09f} the design anb contents of the TOC
  from \autoref{sec:tocastable} were modified; the code here, if executed,
  which will not, reproduces the
  former looks.}
%
We don't have here the problems with the
positioning of |\hline|'s we face with the newer method; on the other
hand we must manipulate token registers which are not familiar to most
\LaTeX{} users (macros could be used, but would be more cumbersome,
except perhaps if using the \eTeX{} \csa{unexpanded}).

The method here is the most powerful because it filters out of the
|.toc| file only the data we want (the other things are not ignored,
they are executed but hopefully do not create havoc; typically they are
language changing instructions, etc...),
and we are less susceptible to fall potential victims of various
external macros inserted in the |.toc| file by other packages.

Note: rather than |\toks| registers it would be easier here to use \eTeX{}
\csa{unexpanded} primitive. See for example \autoref{sec:mindmap}.

\let\appendtotok\relax
\let\PreparePart\relax
\let\PrepareSection\relax
\let\PrepareSubsection\relax
\begin{filecontentshere}{etocsnippet-\snippetno.tex}
\newtoks\toctabletok
\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
  #1\expandafter\expandafter\expandafter {\expandafter\the\expandafter #1#2}}

\newcommand*\PreparePart{%
  \toks0 \expandafter{\etocthelinkednumber}%
  \toks2 \expandafter{\etocthelinkedname}%
  \toks4 \expandafter{\etocthelinkedpage}%
  \edef\toctablepiece {\noexpand\hline
                      \noexpand\strut\the\toks0 &\noexpand\bfseries\the\toks2 
                                 &\the\toks4 \noexpand\\\noexpand\hline}% 
}
\newcommand*\PrepareSection{%
  \toks0 \expandafter{\etocthelinkednumber}%
  \toks2 \expandafter{\etocthelinkedname}%
  \toks4 \expandafter{\etocthelinkedpage}%
  \edef\toctablepiece {\the\toks0 &\the\toks2 &\the\toks4 \noexpand\\}% 
}
%
\newcommand*{\PrepareSubsection}{%
  \toks0 \expandafter{\etocthelinkednumber}%
  \toks2 \expandafter{\expandafter\itshape\etocthelinkedname\strut}%
  \toks4 \expandafter{\expandafter\itshape\etocthelinkedpage}%
  \edef\toctablepiece{&\noexpand\makebox[1cm][c]{\the\toks0}%
                      \noexpand\parbox[t]{\dimexpr6cm-\tabcolsep\relax}
                                         {\noexpand\sloppy\the\toks2}%
                      &\the\toks4 \noexpand\\}%
}

\begingroup
\etocsetstyle{part}{}{}{\PreparePart \appendtotok\toctabletok\toctablepiece}{}

\etocsetstyle{section}{}{}{\PrepareSection \appendtotok\toctabletok\toctablepiece}{}

\etocsetstyle{subsection}{}{}{\PrepareSubsection\appendtotok\toctabletok\toctablepiece}{}

\etocsettocstyle
    {\toctabletok{\hypersetup{hidelinks}%
                 \begin{longtable}{|>{\bfseries}c|p{7cm}|r|}\hline
                 \multicolumn{3}{|c|}{\Large\bfseries\strut TABLE OF CONTENTS}%
                 \\\hline\hline}}
    {\global\toctabletok\expandafter{\the\toctabletok\hline\end{longtable}}}
\etocsettocdepth {subsection}
\tableofcontents
\the\toctabletok
\endgroup
\end{filecontentshere}
\marginattach

\clearpage
\etocdepthtag.toc {etocandworld}
\part{\etoc and the world}

\etocsettocstyle{}{}
\etocdefaultlines % etoc own default
\localtableofcontents

\section{Constraints on the \texttt{.toc} file constitution}

The contents of the |.toc| file (if it already exists) are read into memory by
\etoc once, at the time of |\begin{document}|.%
%
\footnote{%
    Versions earlier than \etocrelease{1.07m} read the |.toc| file at the time of
    \csa{usepackage\{etoc\}}. Thanks to Denis Bitouzé who signaled a Babel
    related problem, which turned out to be caused by this.}

The |.toc| file remains available
  to other packages for read operations until the location of the first table
  of contents at which time a write stream is opened by \etoc and from that
  point the file is erased until its contents are again written to the disk by
  \LaTeX{} at the end of the compilation.

Don't use |\if<condition> stuff \tableofcontents\fi|, but:
\centeredline{|\if<condition> stuff \expandafter\tableofcontents\fi|}
Also a |\else| immediately following \csa{tableofcontents} or
\csa{localtableofcontents} requires a previous \csa{expandafter}.


\etoc can not really cohabit with packages modifying the \csa{tableofcontents}
  command: some sort of truce can be achieved if \etoc is loaded last, hence is
  the winner. 

\begin{framed}
    Do not modify the |\tableofcontents| command like this:
    \centeredline{|\let\oldtableofcontents\tableofcontents|}
    \centeredline{|\renewcommand\tableofcontents{\oldtableofcontents foo}|}
    as this will make the |\label/\ref| mechanism impossible. 

    Rather, redefine  \csb{etocaftertochook}
\centeredline{|\renewcommand\etocaftertochook{foo}|} and there
    is also \csb{etocaftercontentshook} which is executed a bit
    earlier\footnotemark{} just before the closing part of the toc display
    style (and thus still within a group.)

    Prepending is less of a problem (and anyhow there is also
    \csb{etocbeforetitlehook} available to the user).

    Under certain circumstances \etoc imposes its views on
    \csa{tableofcontents} at the time of |\begin{document}|. You may thus have
    to use \csa{AtBeginDocument} to delay your (necessarily ugly and
    non-recommendable) patches. Patching after |\begin{document}| is
    naturally possible but I feel almost a rebel to mention this to \LaTeX{} users!
\end{framed}
\footnotetext{Contrarily to \csb{etocaftertochook},
      \csb{etocaftercontentshook} is not executed if the |tocdepth| did not
      allow the printing of the TOC.}

\etoc \textbf{requires} the |.toc| file to use the \csa{contentsline}
    macro. It \textbf{can not} work if there is no |.toc| file or if the
    |.toc| file does
    not use the \csa{contentsline} macro or if the \csa{contentsline} macro
    second argument mixes number and name in a manner unexpected by \etoc.%
%
\footnote{Prior to \etocrelease{1.1a}, \etoc required the \csa{contentsline} macro
  expansion to invoke \csa{l@section} et al.  It now does not expand
  \csa{contentsline} hence is immune to whatever would happen during this
  expansion, and does not use nor modify the \csa{l@section} et al.\@ macros.}

\section{Compatibility with document classes}

\etoc has mainly been tested with the |article| and |book| standard classes.
Some compatibility layer with the \ctanpkg{KOMA-script} and \ctanpkg{memoir} classes was added at
\etocrelease{1.05} of |2012/12/01|.%
%
\footnote{That this is still in the doc on \texttt{2023/02/22} shows
  the frequency of \etoc syncing with upstream changes... but let me reassure
  the reader there has
  been indeed some occasional, although admittedly rare, internal updates
  in the more than ten years elapsed since.}
%
A compatibility layer is required for what this
document designates as the ``global display style'': \etoc tries to emulate the
default behaviour of the document class when \csb{etocsettocstyle} has not
been used, so that it is still in ``compatibility mode''.  There does not seem
to be an easy
way to extract this in an automated manner dynamically, so it is basically
some manual work which the author initiated in 2012 and which got sporadically
updated since.

\subsection{Compatibility with the \ctanpkg{KOMA-script} classes}
\label{etocscrartclstyle}
\label{etocscrbookstyle}
\label{etocscrreprtstyle}

Not really tested... well, tested by this document with its dozens of \etoc
TOCs and which uses \ctanpkg{scrartcl}!  The package code contains
\begin{verbatim}
\@ifclassloaded{scrartcl}
    {\renewcommand*\etocclasstocstyle{\etocscrartclstyle}}{}
\end{verbatim}
with \cs{etocscrartclstyle} trying to emulate the global display style of the
\cs{tableofcontents} within the class \ctanpkg{scrartcl}.  Thus \etoc is ready
for basic usage in compatibility mode.  See further \autoref{ssec:tocbasic}.

\subsection{Compatibility with the \ctanpkg{memoir} class}
\label{ssec:memoir}
\label{etocmemoirtoctotocfmt}
\label{etocmemoirstyle}

Release \etocrelease{1.07l} has also improved the compatibility with the \ctanpkg{memoir} class: its
|appendix| level has been made known to \etoc. It is at the same level as
|chapter|, thus the chapter line style should possibly do a test for some user
defined boolean whose activation may be added to the |.toc| file at the suitable
location via |\addtocontents{toc}{..}|, if one needs to distinguish the two
kinds of divisions.

The \ctanpkg{memoir} mechanism relative to \toc versus \toc|*| is obeyed
automatically, and applies with \localtoc too.

With release \etocrelease{1.2} some issues which were previously described here
when the ``to toc'' feature of \ctanpkg{memoir} was left acting on local TOCs
have been resolved, as an after-effect of the support for
\etocoption{localtoctotoc} etc..., see \csb{etocsetup}.

\subsection{Compatibility with \ctanpkg{beamer}}

For the reasons mentioned already regarding the constraints on the |.toc| file
constitution, \etoc is incompatible with the
\ctanpkg{beamer} class. However, if \ctanpkg{beamer} is used in an article mode, i.e., with
the article class in conjunction with the \ctanpkg{beamerarticle} package, then \etoc
should work.

\section{Compatibility with other packages}

\subsection{Compatibility with \ctanpkg{babel}}

\begin{framed}
  One must load \etoc \emph{after} \ctanpkg{babel}. This is in order for
  \ctanpkg{babel}'s shorthands to be active at the time when \etoc loads the |.toc|
  file.
\end{framed}

\subsection{Compatibility with \ctanpkg{hyperref}}

Please inform the author in case of issues: \etoc was from the start designed
to be |100%| compatible with package \ctanpkg{hyperref}.

The macros \csb{etocname}, \csb{etocnumber}, and \csb{etocpage} contain the
\ctanpkg{hyperref} links, if present (note that the \emph{linktoc=all} option of
\ctanpkg{hyperref} tells it to put a link also in the page number corresponding to a
given toc entry). For example, the tables of contents of the present document
are all fully linked. It doesn't matter whether \etoc or \ctanpkg{hyperref} is loaded
first.

% 2015/11/12
% Pour une raison que j'ignore dans la TOC principale j'ai un problème avec
% cette sous-section.
% \subsection{Com\-pat\-i\-bil\-ity with \ctanpkg{multicol}}

\subsection{Compatibility with \ctanpkg{multicol}}

\etoc loads the package \ctanpkg{multicol}.

\subsection{Compatibility with \ctanpkg{tocloft}}\label{subs:tocloft}

Release \etocrelease{1.07k} added compatibility with package
\ctanpkg{tocloft}: steps are
taken to prevent the redefinition of |\tableofcontents| done by
\ctanpkg{tocloft} at |\begin{document}|.
%
As long as \etoc is left in compatibility mode the customization done by
\ctanpkg{tocloft} will be obeyed, for both the line styles and the TOC title.
One may still benefit from the \emph{depth tags} management by \etoc,
from its |\localtableofcontents|, from its |\label+\ref| mechanism. One
may use |\etocsetstyle| to define via \etoc the layout for one TOC and
then use rather \ctanpkg{tocloft} for another one, if |\tableofcontents| follows
\csb{etocstandardlines} and \csb{etocclasstocstyle}. In this
compatibility mode |\etocsetlevel{division unit}{6}| will render
invisible the chosen division level, but exchanging levels is otherwise
not possible.

\begin{framed}
  One should load \etoc \emph{after} \ctanpkg{tocloft}. A warning is
  issued if otherwise, because if \etoc is loaded before it will realize that at
  the time of |\begin{document}| and trick \ctanpkg{tocloft} into believing
  having been loaded with the |titles| option.
\end{framed}

It is possible to modify midway in the document the macros \csa{l@section},
\csa{l@subsection} ... but the effect will be seen only in table of contents
typeset by \etoc in compatibility mode (and of course after those
customizations).  It will have no effect on true \etoc TOCs.

\subsection{Compatibility with \ctanpkg{tocbibind}}\label{subs:tocbibind}

Added at \etocrelease{1.2}. See also \csb{etocsetup} for a discussion of the
  package options which are all related to this (they will achieve the
  \ctanpkg{tocbibind} ``to toc'' features without requiring the package).

Thanks to Denis Bitouzé for feature request.

\subsection{Compatibility with \ctanpkg{tocvsec2}}

  \etoc used to be incompatible with package
  \ctanpkg{tocvsec2}; it now cohabits, sort
  of, as it deactivates \ctanpkg{tocvsec2}'s modification of |\tableofcontents|
  and also cancels its other |toc|-related macros, but
  reimplements partially their functionality with \csb{etocsettocdepth.toc}. By
  the way, at least two latex runs are necessary for new uses of this command in
  a document to have an effect in tables of contents.

\subsection{Compatibility with \ctanpkg{tableof}}

It is possible to use simultaneously \etoc and
\ctanpkg{tableof}. Release
\etocrelease{1.08} of \etoc requires at least version |1.4a| of \ctanpkg{tableof}. If
\csb{etocglobaldefs} is put in the preamble, this must be after the loading of
package \ctanpkg{tableof}. {\color{niceone}\ctanpkg{tableof}} command \csa{nexttocwithtags}
should work as expected. 

\ctanpkg{tableof} commands \csa{tableof}, \csa{tablenotof}, ... will
typeset the (a priori global) table of contents according to the document
class defaults, obeying the \etoc depth tags; as explained in the \ctanpkg{tableof}
documentation they do not typeset a TOC title. They should \emph{not} be used
in case \csb{etocglobaldefs} was issued before, except if its scope has been
terminated since then, or \csb{etoclocaldefs} has cancelled its influence.

\subsection{Compatibility with \ctanpkg{tocbasic}}
\label{ssec:tocbasic}

(doc last updated for \etocrelease{1.2})

This has only been tested to the extent of production of this PDF file (which
does have dozens of TOCs, among them a few in compatibility mode).  I
noticed that some things required the global display style to also be set
to compatiblity mode for some \ctanpkg{KOMA-script} user interface to produce
the desired effect.  As an example, the local table of contents of
\autoref{sec:testingcompat} uses |\KOMAoptions{toc=left}| and
\csb{etocstandardlines} but it had to use also \csb{etocclasstocstyle}:
\begin{verbatim}
\begingroup % to keep in particular toc=left with local effect
\KOMAoptions{toc=left}
\etocclasstocstyle % necessary for the display to obey toc=left
\etocstandardlines
\tableofcontents \ref{toc:tocstyle}
\endgroup
\end{verbatim}
On the other hand I could use some other interface without having to activate
the compatibility for the global display style.  See \hyperref[toc:d]{the example} from
\autoref{sec:labeling} or the one from the \autoref{part:control} which uses
\begin{verbatim}
\begingroup
\etocsettocstyle{}{}
\DeclareTOCStyleEntry[numwidth=2em,indent=0pt]{tocline}{section}
\DeclareTOCStyleEntry[numwidth=2.5em,indent=2em]{tocline}{subsection}
\DeclareTOCStyleEntry[numwidth=3em,indent=4.5em]{tocline}{subsubsection}
\etocstandardlines
\localtableofcontents
\endgroup
\end{verbatim}
and demonstrates that this interface works also when not using the
compatibility mode from \csb{etocclasstocstyle}.  Of course, here the
display style is a bit plain... but the \hyperref[toc:d]{example} of
\autoref{sec:labeling} less so; it uses about the same TOCStyleEntry lines as
above with some more width for the numbers of subsections.

\section{\TeX nical matters}

The \csb{etocname}, \csb{etocnumber}, \csb{etocpage} commands are protected
against premature expansion. They are hyperlinks if package \ctanpkg{hyperref}
is loaded and depending on its option |linktoc| value; under the default
|linktoc=section|, only name and number are hyperlinked, not the page
number.

On the other hand \csb{etocthename}, \csb{etocthenumber}, \csb{etocthepage}
are \emph{not} protected against expansion. And neither are
\csb{etocthelinkedname}, \csb{etocthelinkednumber}, \csb{etocthelinkedpage}.
They were modified at \etocrelease{1.1a} and now are always hyperlinks (except for the
latter if the page number is empty), if
\ctanpkg{hyperref} is present, independently of |linktoc| status.

The commands \csb{etoclink} and \csb{etocifnumbered} are also
protected against premature expansion. Also \csb{etociffirst} and
\csb{etoctoccontentsline}.

Commands such as \csb{etocsetstyle}, \csb{etocsetlevel},
\csb{etocsettocstyle}, \csb{etocmulticolstyle},
\csb{etocruledstyle}, \csb{etocframedstyle} obey \LaTeX{}'s
groups. All TOCs are typeset inside groups.

When a \localtoc is inserted by the user in the document, a
line containing an \etoc inner command and an identification
number is added to the |.toc| file on first subsequent compilation.
The correct local table of
contents will be displayed only on the second compilation.


%%% de-\section this for matters of avoiding too cramped mindmap TOC
%%%\section{Errors and catastrophes}

  After using \csb{etocsetstyle} for one level, the remaining
  uncustomized levels use the \etoc default styles (those
  which are activated by \csb{etocdefaultlines}). One has to
  make sure that \textbf{all levels} needed for the next table of
  contents are mutually compatible: in particular the \etoc
  default line styles expect each to be started in ``vertical mode''.

  When using multiple \toc commands in a document, one should beware from
  adding typesetting instructions directly in the |.toc| file, as they will be
  executed by \etoc for \textbf{all TOCs}: even for a \localtoc it doesn't
  matter if that instruction seems to concern material outside of its scope,
  it will get executed nevertheless. If absolutely necessary to add extra
  commands to the |.toc| file, make it in such a way that they can be
  activated or deactivated easily from the document source, e.g.\@ via some
  booleans.

  As is usual with toc and labels, after each change, one has
  to run latex a certain number of times to let the produced
  document get its final appearance (at least twice).\par

\clearpage
\etocdepthtag.toc {code}
\normalmarginpar\marginparwidth72bp
\part{The code}

% return to single spacing
\setstretch{1}

\etocdefaultlines
\etocsettocstyle{}{}

\localtableofcontents

% IL FAUT METTRE AVANT \section{Timestamps} SINON FOUTU
% (non plus maintenant puisque j'utilise \botmark pas \firstmark
%  dans le \rightmark)
% Que c'est pénible cette syntaxe \markboth/\markright de LaTeX !
% Pourquoi est-ce que \markright n'a pas été définie comme #1#2-> truc avec #2 ??
\makeatletter
\if@twoside 
\renewcommand *{\sectionmark }[1]{%
  \markboth
         {\unexpanded{\ifodd\value{page}(\hyperref[imp]{implementation},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[changelog]{\thesection. Change history}%
          \ifodd\value{page}\else\hfill(\hyperref[imp]{implementation},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi}}%
         {\unexpanded{\ifodd\value{page}(\hyperref[imp]{implementation},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[changelog]{\thesection. Change history}%
          \ifodd\value{page}\else\hfill(\hyperref[imp]{implementation},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi}}%
}
\else\error
% faudrait cependant que je réfléchisse à quoi faire exactement en oneside
% mais comme ceci ne peut arriver que si quelqu'un customise etoc.tex
% ce qui n'arrivera JAMAIS, je laisse tomber
\renewcommand *{\sectionmark }[1]{%
  \markright
         {\unexpanded{\ifodd\value{page}(\hyperref[imp]{implementation},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[changelog]{\thesection. Change history}%
          \ifodd\value{page}\else\hfill(\hyperref[imp]{implementation},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi}}%
}
\fi
\makeatother

\section{Timestamp}

This is the documentation as of \texttt{\etocdocdate}, printed from the
source file with the time stamp \texttt{\etocdtxtimestamp}. The package
version is \texttt{\etocpkgversion}, of \texttt{\etocpkgdate}.

\catcode1 13

\begingroup
\renewcommand\lowast{{\normalsize\raisebox{-.4\height}{*}}}
\small

    \section{Change history}\label{changelog}

\setlength{\columnsep}{\etoccolumnsep}

\makeatletter

% 27 avril 2014 un petit hack pour hyphénation (éventuelle) en allemand
% j'ai déjà ~ qui sera de catcode 0, cependant il faudrait aussi les accolades,
% donc finalement pour aller vite, je rends le + actif. Je modifie aussi le test
% fait par \jfverbaspace (n'ayant pas commenté mon code, j'ai dû réfléchir pour
% me rappeler à peu près ce que c'était censé faire).

\def\jfverbatim{\@beginparpenalty \predisplaypenalty 
  \parindent \z@ 
  \parfillskip \@flushglue 
  \parskip \tw@\p@ plus 1fil\relax
  \let \do \@makeother
  \dospecials
  \makestarlowast
  \catcode`$ \active
  \begingroup\lccode`~`$
  \lowercase{\endgroup\def~[##1]{\foreignlanguage{ngerman}{##1}}}%
  \catcode`^ \active
  \begingroup\lccode`~`^
  \lowercase{\endgroup\def~{\nopagebreak}}% ajouté 2014/04/28, oblige à un peu
                                % plus de mark-up cependant
  \catcode`\~\z@ 
  \footnotesize\normalfont\baselineskip10pt\relax
%  \def\v{\vskip\baselineskip v}% ajouté 2015/05/09; faudra trouver mieux.
% 2022/08/30, I remove all "v"'s from version numbers.
% 2023/01/25, creating hypertargets
  \begingroup\lccode`~32
  \lowercase{\endgroup
             \def\1##1~{\vskip\baselineskip\hypertarget{v1##1}{1##1}~}}%
% 2022/08/26, stop using \frenchspacing
  % \frenchspacing
% 2023/01/14
  \def\2##1.{\ctanpkg{##1}}%
% 2022/08/26.  I realized that rendering was broken, and finally identified
% the bad commit to be in LaTeX 2022/06/01 release.  Its \obeyspaces not only
% makes the ascii32 \active but it also redefines it!  Solution could be to
% actually use \obeyedspace in the definition of active space about 20 lines
% below but this would tie to LaTeX 2022/06/01 or later for building etoc.pdf
  \catcode`\ \active %  was \obeyspaces
  \jf@xverbatim
}

\begingroup 
\catcode `|=0 \catcode `[= 1 \catcode`]=2 
\catcode `\{=12 \catcode `\}=12 \catcode`\\=12 
|long|gdef|jf@xverbatim#1\end{jfverbatim}[#1|end[jfverbatim]]
|endgroup

\def\endjfverbatim{} 

\newdimen\jfverbadim
\makeatother

\begin{multicols}{2}
% un \raggedcolumns ne fonctionne pas vraiment pour faire de l'alignement
% de grid à cause du \parskip
\makeatletter
\everypar{\leftskip\jfverbadim\bgroup
          \def\par{\egroup\jfverbadim\z@\@@par}%
          \def\jfverbaspace#1{\if\@sptoken\string#1\unskip\else\ \fi#1}}
%
% see 2022/08/26 above note
\begingroup\obeyspaces\def\x{\endgroup%
\def {\ifvmode\advance\jfverbadim.5em\relax\else\expandafter\jfverbaspace\fi}}\x
\makeatother
\vskip-\baselineskip
\begin{jfverbatim}
~1.2 [2023/03/01]^

    \locallistoffigures and \locallistoftables.

    It is for time being required to pass options `lof', resp. `lot'
    at package loading time to activate these features.  Whether or
    not these features are enabled, etoc interferes in absolutely no
    way with \listoffigures and \listoftables and their respective
    auxiliary files.

    Boolean options (and utility \etocsetup) `maintoctotoc',
    `localtoctotoc', `localloftotoc', `locallottotoc', and
    `ouroboros'.  For above reasons, no `mainloftotoc' or
    `mainlottotoc'.  With `ouroboros=false` local TOCs whose heading
    has been added to the `.toc' file due to `localtoctotoc` will show
    deeper ones and the local `lists of' from their own level, but not
    themselves.
    
    Compatibility layer with `tocbibind'.  Thanks to Denis Bitouzé for
    feature request many years ago.  Sorry for the delay!

    New feature (and breaking change): local tables of contents
    in the default package configuration auto-adapt their titles
    to use the appropriate unnumbered division heading (for example
    a \subsection* if inside a \section).

    Formerly, it was intended one would use \etocsettocstyle (or
    higher level commands), else local TOCs were rendered using the
    same emulation of the document class as for the main TOC.  One can
    still require this document class emulation but then etoc tries at
    least to adapt to the division unit one level below \part (i.e.
    \chapter or \section).  E.g., for KOMA-script the option
    `leveldown' is used.  But this is not appropriate for deeper
    levels in general.

    Ultimate control of toc titling can still be achieved via
    \etocsettocstyle.  Many commands have been added to ease its
    usage.  It is also possible to customize the default behavior
    without \etocsettocstyle.

    Details of the user interface and produced output from these novel
    commands and options are susceptible to change.  Use at own risk.

    Bugfix: the emptiness check could fail for
    \localtableofcontentswithrelativedepth as it ignored tocdepth changes
    originating from inside the .toc file, contrarily to the actual
    typesetting (and behavior with other local tocs)

    Bugfix: the \tableofcontents\ref{foo} syntax caused a
    ``Missing number'' after \vpageref{foo} from package varioref
    in certain circumstances due to \r@foo having then acquired a
    value with an unexpected non-numerical first chunk.

    Breaking change: the \etocsavedsectiontocline et al. macros
    which raised a deprecation warning since 1.1a now use an
    error message.

    \expanded primitive is required.

~1.1d (not released, part of 1.2)^

    Complete internal refactoring of the legacy core code behind
    the concept of ``start'' and ``finish'' parts for line styles.

    \etocifunknownlevelTF and \etoclevel abstract away some
    internals and may be useful for class or package authors.

    \etocsetlevel filters out forbidden keywords `all', `none' and
    others.  Its second argument can be an expression.

    \etocsetstyle checks and warns appropriately if the level is
    unknown to etoc or has a non-accepted numerical value.

    Extensive refactoring of the documentation.

~1.1c [2023/01/20]^

    Fix a brace removal bug in the construction of \etocname.  It
    remained without visible effects in documents using hyperref and
    default settings, thanks to the hyperlink wrapper, but e.g.
    \section{{\color{blue}Blue}} in a document not using hyperref,
    and not using etoc only in "compatibility mode", could cause a
    color leak in the table of contents.

    With the KOMA-script numberline toc feature, unnumbered entries in
    TOCs typeset via etoc user-defined or package provided line styles
    but using compatibility mode for the global display style were
    (knowingly) considered to be numbered with an empty number.  They
    are now considered by \etocifnumbered to be not numbered and the
    empty \etocnumber will carry no hyperlink.

    Fix a 1.1a regression in the context of KOMA-script unnumbered TOC
    entries: \etocthelinkedname could lose its hyperlink.

    Continue internal trimming of old code branches which became
    un-needed after the 1.1a refactoring.  Add relatively decent
    code comments to accompany the 1.1a-c refactoring.  Update
    warning messages to use more consistently LaTeX's templates.

~1.1b [2023/01/15]^

    Documentation fix, 1.1a forgot to mention the following change:
    \etocthelinkedname, \etocthelinkednumber, \etocthelinkedpage
    are now always hyperlinks independently of linktoc status.

~1.1a [2023/01/14]^

    This version brings no new functionality, despite the number bump.
    It implements a complete rewrite of old legacy core internals.
    Formerly, etoc waited for ~2hyperref. (if present) to have added
    hyperlinks via its patch to LaTeX's \contentsline.
    etoc examined the arguments of \l@section and other commands to extract
    hyperlinking information, if any.
    With this release etoc decides earlier according to
    ~2hyperref. linktoc status whether section names and page numbers
    should be hyperlinked, and adds links itself via \hyperlink.  etoc
    is thus now immune to the details of how ~2hyperref. patches the
    \contentsline command, which is not executed anymore.
    Overall, the code is greatly simplified.

    \etoclink now wraps its argument in an hyperlink even if
    ~2hyperref. is configured via
    linktoc=none.  Formerly no hyperlink was added then.

    Deprecation of \etocsavedsectiontocline and similarly named
    commands.  They are not needed as \l@section et al. are with this
    release left unmodified during the table of contents typesetting.

    ~LaTeX kernel from 2020/10/01 or later is required (to allow
    assuming the \contentsline entries in the TOC file always have
    four arguments).

~1.09i [2022/11/21]^

   Fix bug showing when a document uses both \etocchecksemptiness and
   \etocsetlocaltop.toc: the start and finish parts of some levels were
   executed possibly causing extra printed output.

   More hyperlinking in the implementation part of the documentation.

~1.09h [2022/11/20]^

   Documentation improvements.  In particular, attached code snippets
   are now visible via their filenames in the page margins.  Also,
   command names are doubly hyperlinked: first half links to the devoted
   part of the user manual, second half links to the implementation part.

~1.09g [2022/11/17]^

   Compatibility hotfix with recent hyperref 7.00u of 2022-11-13.
   Thanks to Denis Bitouzé for signaling the breakage to the author.

~1.09f [2022/08/30]^

   No more shipping of a German translation of the documentation,
   as it was last updated in April 2015.

   (etoc.pdf) User level commands hyperlink from their code source definitions
   to their descriptions in the documentation part.  Macros used in the code
   source hyperlink to where they first got defined there.

   Wrap the \etocpartname (from etoc's package provided toc line style)
   together with the part number in a potential common hyperlink.

   Try to sync the emulation of the global display style with KOMA-script
   v3.37 (in particular regarding the noparskipfake KOMA toc feature).

   Improve documentation of some aspects under memoir class.

   Remove the \nonumberline token, even though empty, from the meaning of
   \etocthename (KOMA-script classes).

   Add \etocimmediatedepthtag.toc to work around problems related to
   \include (see user doc).  Thanks to Norman Ramsey who reported the problem
   and proposed a work-around in July 2016.  Apologies for the somewhat longish
   delay in incorporating it...

   Also add \etocimmediatesettocdepth.toc.

   Also add \etocimmediatetoccontentsline and its starred variant.

   Also add \etocimmediatesetlocaltop.toc.

   Fix an obscure bug (see source code comments) in the
   \etocsetlocaltop.toc mechanism.

~1.09e [2021/09/23]^

   Needed (if etoc is used without hyperref) updates to
   internal macros to prepare for the upcoming LaTeX November
   2021 change to \contentsline.

   Related updates to the user macro \etoctoccontentsline.

~1.09d [2021/07/13]^

   Some minor synching with tableof 1.4c. 

   Add \etockeeporiginaltableofcontents to provide a work-around to a
   compatibility issue with listings's \lstlistoflistings, which abuses
   \tableofcontents for doing something unrelated to the actual contents.
   Thanks to Denis Bitouzé for report.

   Usage: \usepackage{etoc}\etockeeporiginal-tableofcontents, then
   however you must employ \etoctableofcontents, not \tableofcontents.

~1.09c [2020/05/15]^

   Syncs with KOMA-script deprecation of \iftocfeature.

~1.09b [2019/11/17]^~par~nobreak~vskip-~parskip~vskip-~baselineskip
~1.09a ^

   Sync with memoir v3.7i which has a better location of the TOC
   hyperref anchor. The \etocaftertitlehook can now freely be
   used also with memoir class (formerly its usage in case of
   memoir class was preempted by etoc itself). For more details
   refer to the section "Compatibility with the memoir class".

~1.09 [2019/03/09]^

   New features: \etoclocaltop, \localtableofcontentswithrelativedepth. Thanks
   to Tony Roberts for feature request.

   Note to hackers: internal control sequence \Etoc@localtop is gone.

   etoc now requires e-TeX (\numexpr, \unless).

~1.08p [2018/07/04]^

   Fixed bug surfacing in case of linktoc=page option of hyperref.
   Thanks to Denis Bitouzé for report. Cf:~\
   https://github.com/ho-tex/hyperref/issues/65~\
   https://github.com/dbitouze/yathesis/issues/61

~1.08o [2018/06/15]^

   Fixed bug showing up if an unnumbered TOC entry starts with a brace,
   and document uses hyperref. Caused by a typo in a macro name at
   previous release.


~1.08n [2018/02/23]^

   Refactoring of core macros detecting \numberline and its variants.


~1.08m [2018/02/07]^

   Fix to 1.08k's introduced incompatibility with KOMA-script
   and tocbasic's \nonumberline.


~1.08l [2017/10/23]^

   Workaround an issue with Emacs/AUCTeX wrongly reporting about
   actually non-existent LaTeX errors, which was triggered by some
   strings written (indirectly) to log file by etoc under some
   circumstances.


~1.08k [2017/09/28]^

   Adds \etocsetlocaltop.toc. See corresponding manual section for
   details.

   Adds \etocsavedparttocline, \etocsavedchaptertocline,
   \etocsavedsectiontocline, ... They can be used in the context of
   the technique explained in section "Another compatibility mode".

   Formerly, etoc redefined for the duration of the TOC the memoir
   macro \chapternumberline and its likes to have same meaning as
   \numberline (of course, not when executed in compatibility mode),
   for the sake of extraction of \etocnumber.

   New method detects presence of any \<foo>numberline macro without
   any change to originals; they can thus be used as is when applying
   the approach of "Another compatibility mode" section from manual.


~1.08j [2017/09/21]^

   Since 1.08a-2015/03/13 \etocname, \etocnumber, \etocpage
   contain, if hyperref is present and configured for using
   hyperlinks in the TOC, the link destination in already expanded
   form. This means one can use them even if the style closes a
   group (for example from a & in a tabular), if \etocglobaldefs
   was issued; also one can save their meaning for delayed usage
   (with for example \LetLtxMacro as they are robust).

   But for some legacy reason \etoclink, contrarily to
   \etocthelink, was handled differently. Now, \etoclink also
   contains the link destination in already expanded form, and can
   thus be used even if the line style issues a &, as long as
   \etocglobaldefs is issued.

   Also, bugs dating back to the early days of the package, but
   surfacing only under relatively rare conditions such as usage
   of hyperref with its option "linktoc=page" got fixed.


~1.08i [2016/09/29]^

   This fixes an issue dating back to 1.08e-2015/04/17: under
   \etocchecksemptiness regime, some circumstances (such as
   adding to an already compiled document a \localtableofcontents
   before the main \tableofcontents) created an "Undefined
   control sequence \Etoc@localtop" error. Thanks to Denis Bitouzé
   for reporting the problem.

   On this occasion, \etocdoesnotcheckemptiness
   has been added to unset the flag.

   A rather more exotic issue was fixed: the emptiness check for
   local tocs could get confused if the tocdepth counter was varying
   in some specific ways from inside the toc file.

   After adding to a document a \localtableofcontents, two LaTeX
   passes are needed for etoc to get a chance to print the
   correct local contents. Formerly, etoc issued a Warning on
   the first pass; it now also induces LaTeX into
   announcing "There were undefined references", as this is nearer
   to the end of the log file and console output.


~1.08h [2016/09/25]^

   New functioning of \etocsetnexttocdepth: the tocdepth counter is
   modified only at the time of the table of contents, not before.
   This fixes an issue which arose when \etocsetnexttocdepth was
   used multiple times with no intervening table of contents.
   Thanks to Denis Bitouzé for reporting the problem.

   The PDF documentation includes about 25 LaTeX code snippets also
   as file attachment annotations, additionally to their verbatim
   typesetting. The ordering of the documentation contents has been
   slightly re-organized.

   A previous documentation-only update on 2016/09/09 added a new
   section with the (approximate) translation into etoc lingua of the
   book class toc style, for easy customizability.


~1.08g [2015/08/29]^

   Downgraded to a mere info message the etoc-issued warning
   (relative to \settocdepth/\maxtocdepth) under class memoir.


~1.08f [2015/04/28]^

   Minor changes to the documentation. \etocsetlevel more economical.


~1.08e [2015/04/17]^

   The command \etocchecksemptiness tells etoc to not print, from
   that point on, the headings of the local tables of contents if
   they have empty contents. This is mainly for class authors who
   might want to have their \section or \chapter automatically do
   a \localtableofcontents. Could prove also useful for batch
   conversions of documents. Thanks to Paul Gaborit who asked for 
   such a feature.

   The command \etocnotocifnotoc extends this behaviour to global
   TOCs: indeed why should documents with no sectioning units take
   this as an excuse not to use package etoc ?

   The command \etocifwasempty{yes}{no} can be used for
   suitable extra action.

   A \tableofcontents\ref{foo} now expects foo to be a label to a
   _local_ TOC. The use with foo a label to a _global_ TOC is not
   supported anymore as it had no utility and made the code more
   complex.

   The syntax \localtableofcontents\ref{foo} is now accepted as a
   synonym to the earlier syntax \tableofcontents\ref{foo}.


~1.08d [2015/04/09]^

   Translation into German of the additions made to the documentation
   for the 1.08x series of releases.

   Thanks to Christine Römer!


~1.08c [2015/03/30]^

   - removed a few unneeded \long from the code.
  
   - removed use of \arabic at one location of the code, as it may get
  redefined by some language modules for babel or polyglossia.


~1.08b [2015/03/18]^

   Bug fixes: 

   - extra space token removed from `\localtableofcontents` (showed
   only for inline TOCs.)

   - \etocpartname (a macro used by the package own default line
   styles) was defined to be \partname, but this is not compatible
   at least with babel+french context. Now simply expands to Part.

   - some problems fixed in the German documentation.

   - [2015/03/28] some more problems fixed in the documentation. Added
   mention of \etocarticlestyle and \etocbookstyle.


~1.08a [2015/03/13]^

   \etocname, \etocnumber and \etocpage are now the robust
   variants of \etocthelinkedname, \etocthelinkednumber and
   \etocthelinkedpage. This should arguably have been done since
   the addition of the latter to etoc with 1.07f [2013/03/07].
   The earlier robust commands \etocname etc... contained
   the hyperlink destination only in an unexpanded form.

   The documentation has a brand new title page and a new section
   The TOC as a TikZ mind map both illustrating further uses of
   etoc to display tables of contents as trees in an automatic 
   manner.


~1.08 [2015/03/10]^

   \etocskipfirstprefix may now appear anywhere in the <start>
   part of a level style. 

   New commands \etociffirst, \etocxiffirst, \etocxifnumbered,
   \etocglobaldefs and \etoclocaldefs.

   It is now possible to issue line style specifications directly
   with & and \\ tokens, in order to typeset a TOC as a tabular
   or longtable with the opening for example in the first
   argument of \etocsettocstyle and the closing in its second
   argument.

   It is mandatory for such uses to issue \etocglobaldefs which
   tells etoc to proceed globally for certain definitions. This
   is also useful in the context of the inline environments of
   package enumitem.

   On this occasion, various old parts of the code have been
   improved.


~1.07n [2015/03/05]^

   No more use of \toks@ when etoc constructs \etocthelinkedname
   etc... Thus \toks@ can be put in the line styles in order to
   accumulate information. Only useful if it is certain nothing
   else will change \toks@ either.

   In the documentation: list of main commands now in alphabetic
   order.


~1.07m [2015/01/23]^

   Reading of .toc file is delayed to \begin{document} to account for
   possible Babel active characters used therein. Thanks to Denis
   Bitouzé who reported a Babel related problem.

   Improved global toc display emulation under KOMA-script classes.

   New command \etocbeforetitlehook. New command \etocdisplay.


~1.07l [doc of 2014/04/29]^

   Added to the documentation an example of use of \etocthelinkedname together
   with an enumitem inline itemize* environment; moved main TOC to immediately
   after the title, and license to the first pages.

   Incorporation of the translation into German done on the initiative of
   $[Christine Römer] by $[Felix Baral-Weber, Jenny Rothkrämer-Vogt, Daniel
   Büttner, Claudia Dahl, Christian Otto and Christine Römer (FSU Jena).] My
   grateful thanks to all!


~vskip~baselineskip1.07l [2014/04/22]^

   Fixes a bug with the 1.07k compatibility layer with tocloft which had broken
   the 1.07k (sic) compatibility with memoir (yes, memoir class 1.07k testing
   had been done before adding the tocloft thing to the source code . . . ).
   Also, etoc when detecting tocvsec2 now checks if this is under the memoir
   class, as then nothing special needs to be done to rescue \tableofcontents,
   contrarily to the situation with the native tocvsec2. 


~1.07k [2014/03/06]^

   Compatibility with package tocloft; and improved compatibility with
   class memoir. Novel TOC example in Overview.


~1.07j [2013/12/03]^

   Some issues with the documentation formatting (now two-sided) have been
   addressed, and a novel documentation section ``Typesetting the TOC as a
   table'' has been added. Very minor code change (\Etoc@readtoc).


~1.07i [2013/10/21]^

   Changes to the \etocmulticolstyle and \etocruledstyle codes 
   to lessen the risk of a page break after the title (in the one-column case).


~1.07h [2013/10/16]^

   New commands \etocdepthtag.toc, \etocsettagdepth, \etocobeydepthtags,
   \etocignoredepthtags. 


~1.07g [2013/10/13]^

   New commands \etocsettocdepth, \etocsettocdepth.toc,
   \etocobeytoctocdepth, \etoc~-ignoretoctocdepth which
   emulate part of tocvsec2 functionality ; measures to
   make tocvsec2 partially compatible with etoc.

   New commands \etocsetnexttocdepth, \invisibletableofcontents,
   \invisiblelocaltableofcontents.

   Switched from tikz-qtree to forest for the first `toc as
   tree' example. 

   Command names are linked to their descriptions, and many
   other changes in the documentation.

   Removed printing of temporary message when the local toc
   id is not yet stabilized; indeed \localtableofcontents
   can have many uses, such as filling up some token list
   register and one may wish to not have anything typeset, 
   even in an intermediate run. 

   All of tex etoc.dtx, etex etoc.dtx, xetex etoc.dtx, latex
   etoc.dtx, pdflatex etoc.dtx are now possible, and the
   extracted file etoc.tex allows easy customization of
   compilation options for the documentation (default is via
   dvipdfmx which produces the smallest file).


~1.07f [2013/03/07]^

   New macros \etocthelinkedname, \etocthelinkednumber,
   \etocthelinkedpage, and \etocthelink.


~1.07e [2013/03/01]^

   Improvements in the package own line styles with
   regards to penalties and vertical spaces. 

   Addition to the documentation of an example of
   a tree-like table of contents (uses tikz).

   More such examples added 2013/03/03.


~1.07d [2013/02/24]^

   Minor code improvements and new documentation 
   section ``Another compatibility mode''.


~1.07b [2013/02/02]^

   Removal of the \xspace from the macros \etocname, 
   \etocnumber, \etocpage.

   Additional examples in the documentation.


~1.07 [2013/01/29]^

   New commands:

      \etocthename, \etocthenumber, \etocthe~-page, \etoclink, 

      \etoctoccontentsline, \etoctoccontentsline~lowast

      \etocnopar, \etocaftercontentshook

   Modified command: \etocmulticolstyle

   New documentation section ``Surprising uses of etoc'' which
   explains how to do  ``Lists of arbitrary things'', in
   addition to the tables of contents.


~1.06 [2012/12/07]^

   The standard macros \l@section etc... are modified only
   during the calls to \tableofcontents; they can thus be
   customized as will by the user (with the help of a
   package like tocloft) and this will be taken into account
   by etoc for the TOCs typeset in compatibility mode.


~1.05 [2012/12/01]^

   \localtableofcontents replaces \tableofcontents~lowast (for
   compatibility with the memoir class).

   Compatibility with KOMA-script and memoir document
   classes.


~1.04 [2012/11/24]^

   A (possibly local) table of contents can be labeled:

       \tableofcontents \label{toc:1}

   and reproduced elsewhere in the document (with a possibly
   completely different layout):

       \tableofcontents \ref{toc:1}


~1.02 [2012/11/18]^

   Initial version.

\end{jfverbatim}
\end{multicols}
\endgroup  % group for modified verbatim printing of the changes log

\makeatletter
    \let\check@percent\original@check@percent
\makeatother

\small

% Que c'est pénible cette syntaxe \markboth/\markright de LaTeX !
% Pourquoi est-ce que \markright n'a pas été définie comme #1#2-> truc avec #2 ??
\makeatletter
\if@twoside 
\renewcommand *{\sectionmark }[1]{%
  \markboth
         {\unexpanded{{%
% counteract some changes done by my macrocode hooks
% so we must make sure it is in a scope limiting context
% (perhaps it is already, will not check, wasted already
% too much time on this header matter) November 2022
          \hypersetup{linkcolor=RoyalBlue}%
          \ifodd\value{page}(\hyperref[changelog]{change log},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[imp]{\thesection. Implementation}%
          \ifodd\value{page}\else\hfill(\hyperref[changelog]{change log},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi
          }}%
         }
         {\unexpanded{{%
          \hypersetup{linkcolor=RoyalBlue}%
          \ifodd\value{page}(\hyperref[changelog]{change log},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[imp]{\thesection. Implementation}%
          \ifodd\value{page}\else\hfill(\hyperref[changelog]{change log},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi
           }}%
          }%
}
\else
% faudrait cependant que je réfléchisse à quoi faire exactement en oneside
% mais comme ceci ne peut arriver que si quelqu'un customise etoc.tex
% ce qui n'arrivera JAMAIS, je laisse tomber
\renewcommand *{\sectionmark }[1]{%
  \markright
         {\unexpanded{{%
          \hypersetup{linkcolor=RoyalBlue}%
          \ifodd\value{page}(\hyperref[changelog]{change log},
                                         \hyperlink{FRONTPAGE}{user manual
                                           front page})\hfill\fi
          \hyperref[imp]{\thesection. Implementation}%
          \ifodd\value{page}\else\hfill(\hyperref[changelog]{change log},
                                        \hyperlink{FRONTPAGE}{user manual
                                          front page})\fi
          }}%
         }%
}
\fi
\makeatother

\section{Implementation}\label{imp}

% ce \noindent est obsolète 2022/08/26 à cause des hooks à macrocode plus bas
% transférés depuis xint.dtx.  Il est doublement obsolète car je rajoute un
% paragraphe de texte de toute façon avant le premier macrocode.
% \indent % !!!!!!!!!!!!!!!!! Lundi 09 mars 2015 à 09:32:22
% il faut faire un paragraphe après \section sinon pas d'espacement
% vertical en sortie de blocs macrocode. Pas évident à trouver, vu que
% je customisais différentes choses qui pouvaient affecter macrocode.

% 9 mars 2015
% Pour rappel on avait dans le préambule:
% \def\MacroFont{\ttfamily\small\hyphenchar\font45 \baselineskip11pt\relax}
% 28 février 2023
% Mis à jour
% \def\MacroFont{\ttfamily\hyphenchar\font45\relax\setstretch{1}}
% ce qui donne donc le \macro@font qui sera utilisé.
% J'ai déjà fait \setstretch{1} au déput de la partie The code, donc
% je peux le supprimer ici
\def\macro@font{\ttfamily\hyphenchar\font45\relax}

% 26 septembre 2021
\catcode1 14 % pour pouvoir utiliser ^^A, car je l'avais mis à \active

\StopEventually{\normalsize
  \ifnum\NoSourceCode=1
     \texttt{\parindent 0pt\rightskip 1cm minus 1cm
     This documentation has been compiled without inclusion of the source
     code. To produce the documentation with source code included:\endgraf
     \ \ \ \ run etex on etoc.dtx to produce etoc.tex,\endgraf
     \ \ \ \ then thrice pdflatex on etoc.tex.\endgraf
}%
  \fi
\end{document}}

%%%%%%%%%%%%
% 26 août 2022, transfert depuis xint de hack de doc
%
% This worked remarkably well with almost no changes! Particularly for
% hyperlinking to the documentation part from the macro definitions! But
% also for internall cross-links in implementation part despite no usage
% there of any sectioning mark-up (so I don't need the \@sect hack, and
% related \csa, \csan, \csh, \cshn, \cshintitle, \cshnintitle macros).
% I noticed in passing that I never used any \begin{macro} mark-up here
% in the etoc.dtx. Perhaps I should and should one day look at what doc=V3
% brings...
%
% See xint.dtx for comments, as I have removed most when copying.
\makeatletter
\def\odef #1{\expandafter\def\expandafter#1\expandafter}% needed from xintkernel

%%% xint.dtx does \def\macro@font {\ttfamily }% (with a font allowing hyphenation)
%%% Our \macro@font has been defined earlier from \MacroFont in preamble and
%%% is \ttfamily\small\hyphenchar\font45 \baselineskip11pt\relax
%%% etoc.dtx: see further below for how the * is handled in \macro@finish
\renewcommand\lowast{{\iflabelmacro@allowed\xintdocMacrocodeFallbackColorCmd\fi
                      \raisebox{-.25\height}{*}}}
\AddToHook{env/macrocode/begin}{\makestarlowast}
% https://github.com/latex3/latex2e/issues/563
% (but I don't use sectioning commands in implementation part of etoc.dtx so far)
\AddToHook{env/macrocode/after}{\@nobreakfalse}
\AddToHook{env/macrocode/begin}{\partopsep0pt\relax}
\begingroup
\catcode`\|=\z@ \catcode`\[=\@ne \catcode`\]=\tw@
\catcode`\{=12 \catcode`\}=12
% Let % be active to use a color for it and gray-out
% comments left in code (there are few)
\catcode`\%=13 \catcode`\ =\active \catcode`\\=\active
|gdef|xmacro@code#1%    \end{macrocode}[#1|end[macrocode]]
|endgroup
%%% 2022/08/27: for etoc.dtx try to really use comment color in comments
%%%             this is not a complete solution, but enough for use case
\begingroup\catcode`\%=\active\catcode`\^^M 13
\gdef%{\begingroup\color{macrocodecommentcolor}^^A
                  \let\xintdocMacrocodeFallbackColorCmd\@empty^^A
       \@percentchar\odef
{\expandafter\endgroup
}}\endgroup
\begingroup\let\newcount\@gobble\@definecounter{CodelineNo}\endgroup
\def\theCodelineNo{\reset@font\scriptsize\arabic{CodelineNo}}
\def\theHCodelineNo{\the\value{section}.\the\value{CodelineNo}}
%%% not needed for etoc.dtx
%%%%%%% attention j'utilise plus bas \MakePrivateLetters pour
%%%%%%% problème de straight quotes depuis 2023/01/18 (1.1c)
%%% \def\xintMakePrivateLetters{\catcode`: 11 \catcode`? 11 \catcode`@ 11 
%%%                             \catcode`^ 11 \catcode`_ 11 }
%%% \def\xintexprMakePrivateLetters{\xintMakePrivateLetters \catcode`! 11 }
%%% \let\MakePrivateLetters\xintMakePrivateLetters
% \definecolor{etocnamecolor}{RGB}{228,57,0}
% \colorlet{verbcolor}{Maroon}
%
% \colorlet{privatecommentcolor}{cyan}
% \colorlet{macrocodecommentcolor}{gray}
% \colorlet{macrocodenewmacrocolor}{verbcolor}
% \colorlet{macrocodelinktouserdoccolor}{etocnamecolor}% and bold face
% \colorlet{macrocodelinktosectioncolor}{DarkBlue}% and bold face
% \colorlet{macrocodelinktocodelinecolor}{DarkBlue}
% \colorlet{macrocodenoncscolor}{Green}
\def\xintdocMacrocodeFallbackColorCmd{\normalcolor}
\odef\init@crossref{\init@crossref%
     \everypar{\refstepcounter{CodelineNo}%
               \llap{{\xintdocMacrocodeFallbackColorCmd\theCodelineNo}\
                      \hskip\@totalleftmargin}%
               }%
     \catcode`\%\active
}%
\def\scan@macro{%
   % we do not insert it yet
   % \special@escape@char
   \step@checksum
%   \ifscan@allowed
      \let\macro@namepart\@empty
      % we need this for reasons explained below
      \let\macro@spacepart\@empty
      \def\next{\futurelet\next\macro@switch}%
%   \else \let\next\@empty \fi
   \next
}
% unchanged:
% \def\macro@switch{\ifcat\noexpand\next a%
%      \let\next\macro@name
%      \else \let\next\short@macro  \fi
%    \next}
\def\short@macro#1{\special@escape@char#1}
% \def\macro@name#1{\edef\macro@namepart{\macro@namepart#1}%
%      \futurelet\next\more@macroname}
% \def\more@macroname{\ifcat\noexpand\next a%
%      \let\next\macro@name
%      \else \let\next\macro@finish \fi
%      \next}
\def\more@macroname{\ifcat\noexpand\next a%
     \expandafter\macro@name
     % we keep the \next for usage later and start filtering out of the way spaces
     % this is caused by necessity of handling things such as \let<space>\foo\bar
     % but also not be fooled by \let<space>#6\macro
     \else \expandafter\macro@gatherspaces \fi
     }
\def\macro@gatherspaces{%
    \ifx\next\@xobeysp
        \expandafter\macro@gatherspaces@i
    \else
        \expandafter\macro@finish
    \fi}%
\def\macro@gatherspaces@i#1{%
    \odef\macro@spacepart{\macro@spacepart#1}% #1 = active space
    \futurelet\next\macro@gatherspaces}%
\newif\iflabelmacro@allowed
\newcounter{xintMacroCnt}
%%% pour l'instant pas relevant pour etoc, pas de mark-up par \subsection etc...
\def\xintimplabelprefix{src-}
\let\xintdoclabelprefix\empty
%%% next thing is used in xint.dtx in a hack of \@sect but we don't have so
%%% far sectioning mark-up in etoc.dtx implementation part
%%% \let\xintlabelprefix\xintimplabelprefix
\catcode`_ 11 \catcode`* 11
\def\macro@finish{%
  \iflabelmacro@allowed
   \expandafter\in@\expandafter{\expandafter.\macro@namepart,}%
   {.csname,.expandafter,.noexpand,.else,%
    %.t,.w,.x,.y,.z,.XINT_x,.XINT_y,%
    %.XINT_tmpa,.XINT_tmpb,.XINT_tmpc,.XINT_tmpd,.XINT_tmpe,% _ is letter here
    %.XINT_expr_defbin_b,.XINT_expr_defbin_c,.XINT_expr_defbin_d,%
    .empty,.space,.protect,}%
   \ifin@
     {\xintdocMacrocodeFallbackColorCmd\special@escape@char\macro@namepart}%
   \else
     \ifcsname alreadydefined-\macro@namepart\endcsname
       \hyperref[etocmacro-\macro@namepart]{\special@escape@char\macro@namepart}%
     \else
       % this will make a rather large number of macro names in the string pool...
       \global\expandafter\let\csname alreadydefined-\macro@namepart\endcsname\@empty
       \label{etocmacro-\macro@namepart}%
       \stepcounter{xintMacroCnt}%
       % try to link to a labeled reference in the user documentation (xint-all.pdf)
       \ifcsname r@\xintdoclabelprefix\macro@namepart\endcsname
          {\hypersetup{linkcolor=macrocodelinktouserdoccolor}%
           \hyperref[\xintdoclabelprefix\macro@namepart]%
                    {\textbf{\special@escape@char\macro@namepart}}}%
       \else
       % try to link to a labeled section in implementation part
       %% THIS BRANCH WILL NEVER BE USED IN etoc.dtx FROM ABSENCE OF
       %% ASSOCIATED MARK-UP
       \ifcsname r@\xintimplabelprefix\macro@namepart\endcsname
          {\hypersetup{linkcolor=macrocodelinktosectioncolor}%
           \hyperref[\xintimplabelprefix\macro@namepart]%
                    {\textbf{\special@escape@char\macro@namepart}}}%
       \else
          \textcolor{macrocodenewmacrocolor}{\textbf{\special@escape@char\macro@namepart}}%
       \fi\fi
     \fi
   \fi
   \labelmacro@allowedfalse
   \expandafter\in@\expandafter{\expandafter.\macro@namepart,}{.expandafter,}%
   \ifin@
      \ifx\next\scan@macro\labelmacro@allowedtrue\fi
   \fi
  \else % end of labelmacro@allowedtrue branch
%%% etoc.dtx adds complications to handle \newcommand*
    \if0\ifx\next\scan@macro0\else\ifx\next\lowast0\else1\fi\fi
      \expandafter\in@\expandafter{\expandafter.\macro@namepart,}%
                {.def,.edef,.let,.gdef,.xdef,%.odef,.oodef,.fdef,
                 .chardef,.newif,.newtoks,.newcommand,.DeclareRobustCommand,%
                 .newread,.newwrite,}%
      \ifin@\labelmacro@allowedtrue\fi
    \fi
    \ifcsname r@etocmacro-\macro@namepart\endcsname
      \hyperref[etocmacro-\macro@namepart]{\special@escape@char\macro@namepart}%
    \else
      {\xintdocMacrocodeFallbackColorCmd\special@escape@char\macro@namepart}%
    \fi
  \fi
  % \ifnot@excluded
  %    \edef\@tempa{\noexpand\SpecialIndex{\bslash\macro@namepart}}%
  %    \@tempa  
  % \fi
  \macro@spacepart
}%
\catcode`_ 8 \catcode`* 11
%%% In order mainly to colorize #1, #2, etc... we do this rather
%%% non-economical thing of colorizing all of macrocode with
%%% the "non control sequence color", hence this means all
%%% control sequences will have their own color command...
%%% This is because when doing this in June 2022 for xint, I did
%%% not want to hack more doc.sty scanning process of tokens,
%%% but perhaps I should, it would be more economical.  Kept as is
%%% when transferring to etoc.dtx 2022/08/26
{\sbox0{\color{macrocodenoncscolor}\xdef\foo{\current@color}}}
\ifpdf
   \edef\xintdoc@macrocode@pushcolor
      {\pdfcolorstack\noexpand\@pdfcolorstack push{\foo}\relax}
   \def\xintdoc@macrocode@popcolor{\pdfcolorstack\@pdfcolorstack pop\relax}
\else
\ifxetex
   \edef\xintdoc@macrocode@pushcolor{\special{color push \foo}}
   \def\xintdoc@macrocode@popcolor{\special{color pop}}
\else
\ifnum\Withdvipdfmx=1
     \edef\xintdoc@macrocode@pushcolor{\special{color push \foo}}
     \def\xintdoc@macrocode@popcolor{\special{color pop}}
\fi\fi\fi
%%% 2022/08/26 \par added for etoc.dtx
\AddToHook{env/macrocode/before}{\xintdoc@macrocode@pushcolor\par}
\AddToHook{env/macrocode/end}{\xintdoc@macrocode@popcolor}
% let's use some more quiet color for links inside the code
\AddToHook{env/macrocode/begin}{\hypersetup{linkcolor=macrocodelinktocodelinecolor}}
% let code line numbers really be fully in the margin
\MacroIndent\z@

% 2023/02/22, 1.2 uses setspace
% 2023/02/27, I return to single line spacing finally
%\AddToHook{env/macrocode/before}{\vskip.5\baselineskip}

\makeatother

% 18 janvier 2023 fix d'un problème de guillements courbes et d'inutilité de upquote,
% import de mon code de lgrmath de novembre 2022
% useless with doc.sty as \verb, verbatim and macrocode do not use \@noligs
% \usepackage{upquote}
% 
\begingroup
\catcode`\'\active\catcode`\`\active
\gdef\MakePrivateLetters{\makeatletter\def`{\textasciigrave}\def'{\textquotesingle}}
\endgroup
% https://github.com/latex3/latex2e/issues/953, for the record

% will be used in code comments
% I could re-define \csb, but perhaps better as the mark-up is not yet there
% when I define this to opt for a new name
\makeatletter
\DeclareRobustCommand\csbc[1]{{\hypersetup{linkcolor=macrocodelinktocodelinecolor}%
    \ifcsname r@etocmacro-#1\endcsname
       \hyperref[etocmacro-#1]{\ttfamily\hyphenchar\font45 \char`\\ #1}%
    \else
       % for .toc suffixed macros
       \ifcsname r@etocmacro-\xintTrimUnbraced{-4}{#1}\endcsname
          \hyperref[etocmacro-\xintTrimUnbraced{-4}{#1}]
                   {\ttfamily\hyphenchar\font45 \char`\\ #1}%
       \else
% red color was not enough for me to identify misspelled macro names
% but I should have a warning mechanism, the problem is how to
% have it activated only at right time?
          {\fboxsep-\fboxrule\color{Orchid}%
           %\fbox{\textcolor{red}{\ttfamily\hyphenchar\font45 \char`\\ #1}}%
           \fbox{\ttfamily\hyphenchar\font45 \char`\\ #1}%
          }%
% ah ok let's do this (2023/01/22, 1.2)
          \ifcsname r@etocmacro-etocname\endcsname
            \expanded{\noexpand\AtEndDocument
                       {\noexpand\PackageError{etoc}{Pas de référence à #1\on@line}%
                                                    {Corriger!}
                       }%
                     }%
          \fi
       \fi
    \fi }%
}
\makeatother

\setcounter{secnumdepth}{3}

\paragraph{About the syntax highlighting of the code:}
Control\normalmarginpar\marginpar{\footnotesize\rmfamily\itshape\RaggedRight
  The ``syntax highlighting'' was added at release \etocrelease{1.09f} of 2022/08/30.\par}
sequences are mostly hyperlinks.  When a user level command gets defined it
hyperlinks to the user documentation with bold face and
\textbf{\textcolor{macrocodelinktouserdoccolor}{using this colour}}.  Further
instances if they occur will use \textcolor{macrocodelinktocodelinecolor}{this
  colour} to link to their place of first definition inside the code lines.
Package macros with no user level documentation hyperlink to their first
place of definition in the code.
And such non-user level macros, at the location of
their first definitions will have their names displayed using bold face and
\textbf{\textcolor{macrocodenewmacrocolor}{this colour}} (it is not
an hyperlink then). Comments located \emph{inside} the code source (very little are
left at \etocrelease{1.1a}) have been configured
\textcolor{macrocodecommentcolor}{to be rendered in their own colour}, and
\textcolor{macrocodenoncscolor}{non commented-out and non-control sequences
  tokens use this colour}.  Other tokens use the fall-back normal colour.
A package macro mentioned in code comments also hyperlinks
to the location of its first definition  using
{\textcolor{macrocodelinktocodelinecolor}{this colour}}.

Known limitations:
\begin{enumerate}[nosep]
\item The location of first definition may be disappointing as it may be a
  provisory definition.
\item Macros such as \csbc{Etoc@next} are there for matters of code branching
  only, and the first encountered definition has no relevant significance.
\item Macros defined using |\csname...\endcsname| or alike constructs are not
  detected by the syntax highlighting automatization.  Apart from manual
  intervention, this appears complex to solve as moreover the macro name may be
  there indirectly as an argument such as |#1|.
%%%% This was caused by a ... 2013 oversight in my way of customizing txtt,
%%%% see in preamble near loading of txfonts... fixed 2023/01/18
%%%% \item Bold face has an increased character width, somewhat offsetting the
%%%%   codelines alignment.
\end{enumerate}

\paragraph{An apology:}
the code comments served mainly as a record for the author's benefit
of the historical evolution of the package and rarely as a description of what
the macros do.  At \etocrelease{1.1a} I have removed almost all code comments which had
accumulated as in a palimpsest.  As a result, very few comments actually
remain.  \etocrelease{1.1c} re-added comments to those parts of the code which
got refactored at and since \etocrelease{1.1a}, revigorating the palimpsest stratification.

\paragraph{About \etoc and the processing of \texttt{.toc} file data:}
\etoc,%
%
\normalmarginpar\marginpar{\footnotesize\rmfamily\itshape\RaggedRight
  This paragraph and the next were added very late in the history of the
  package, at \etocrelease{1.09h} and later.\par}
%
when not left in compatibility mode, hijacks the \csa{contentsline} expansion
so as to not execute \csa{l@chapter}, \csa{l@section} etc..., but rather to
parse the data and extract from it the \emph{name}, \emph{number}, and
\emph{page number}.
%
The \LaTeX{} |.toc| data
is \emph{not structured}, but contains already typesetting mark-up.
The
\etoc maneuvers to disentangle \emph{name} and \emph{number} are somewhat
fragile as they expect the |.toc| file to contain the
\csa{contentsline} arguments to be arranged in a certain manner.
Of course \etoc can be easily broken if changes happen to how data is stored
there. Things would have been much easier for \etoc in 2012 if the
\csa{contentsline} arguments had considered the section titles (aka
\emph{name} for \etoc) and their numbers (which are not numbers in the sense
of things with which \TeX\ can compute, in general) separately, each providing
an argument to \csa{contentsline}.  But some mix is prepared, which may depend
on the document class also, and besides usually handles \csa{part} levels very
differently.  Fortunately upstream changes happen rarely.%
%
\normalmarginpar\marginpar{\footnotesize\rmfamily\itshape\RaggedRight
  Prior to \etocrelease{1.1a}, \etoc aliased \csa{l@chapter},
  \csa{l@section}, etc... (at the time of TOC typesetting only)
  to its own \csbc{Etoc@lxyz} in order to leave time to
  \ctanpkg{hyperref} to add its mark-up.  Thus the disentangling
  of name from number
  was more complex than it is now.  With \etocrelease{1.1a}, \etoc
  leaves \csa{l@chapter} etc... unmodified (and unused) and
  only hijacks \csa{contentsline}.}
%

The other core part of \etoc present from day one of the package is that it
creates a tree-like structure of the sectioning levels present in the |.toc|
file.  But this is purely virtual, and handled via a notion of ``level'' and
\TeX\ conditionals.  It could be fun to implement officially such a tree
(where the children of a sectioning title are the sectioning levels at a
greater depth such as subsections versus a section).  Let us recall that
\LaTeX{} provides zero means to know from a subsection for example, what is
the title of the section containing it, or chapter, or part.  To do this one
has to create a really structured document which neither core \LaTeX{} nor the
main document classes do.  This remark was given for document body, but it
also applies to the |.toc| data.  But \etoc adds at least some kind of
follow-up to the successive encountered sectioning titles, and is thus able,
to ``on-the-fly'' add some kind of structure and follow the chaining of
levels.  Ultimately this is why the \csbc{etocsetstyle} offers \marg{start}
and \marg{finish} parts in additions to \marg{contents} (which I divided into
a \marg{prefix} and a \marg{contents}).  At some point one could imagine that
a really \emph{structured} document (in opposition to what core \LaTeX{} from
thirty years ago up to nowadays realizes) would store in the |.toc| data
directly a tree structure, where each node would have attributes name, number,
page number, completely separated from any typesetting.  Once this exists then
basically \etoc disappears.  In brief, once \etoc ideas will have permeated
the society, it will disappear as its was born only to palliate the absence of
real structure in the |.toc| file (which is sort of inherited from the absence
of real structure in a \LaTeX{} document body).

%  9 avril 2015 (1.08d) pour forcer indentation après macrocode
% par un effet particulier si avant macrocode un enumerate, inefficient,
% mais vraiment pas envie d'investiguer.
%
% l'esthétique est un peu douteuse mais je laisse ? 

% non finalement je supprime

% \makeatletter
% \def\endmacrocode{%
%                  \ifpm@module \endgroup \pm@modulefalse \fi
%                  \everypar{}%
%                  \global\@inlabelfalse
%                  \endtrivlist\@endpefalse % <<-- ajouté 
%                  \close@crossref}
% \makeatother


% This is obsolete as 1.09g of 2022/11/17 has removed this hack, also
% for colorizing reasons from 1.09n.
% November 2012
% I don't want to have to type at this location (far from the top of the
% file) explicitly the package version or version date, as it is
% inconvenient to have to remember to do this when updating the package.
% Also, I prefer not to add macros to the |.sty| file giving the package
% date, name, or version. So I extracted this from the real macrocode
% environment (leaving out the \init@crossref.)

% The catcode hackery next is to avoid to have <*package> to be listed
% in the commented source code...
% (c) 2012/11/19 jf burnol ;-)

\MakePercentIgnore

%
% \catcode`\<=0 \catcode`\>=11 \catcode`\*=11 \catcode`\/=11
% \let</none>\relax
% \def<*package>{\catcode`\<=12 \catcode`\>=12 \catcode`\*=12 \catcode`\/=12}
%
%</none>
%<*package>
% \etocrelease{1.1a} implements a radical change to legacy core internals for compatibility
% with some (future) \ctanpkg{hyperref} changes.  In order to facilitate this
% overhaul, we require \LaTeX{} 2020/10/01 for the fourth argument to
% \cs{contentsline} lines in the |.toc| file to be always present.
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}[2020/10/01]
\ProvidesPackage{etoc}
[2023/03/01 v1.2 Completely customisable TOCs (JFB)]
%    \end{macrocode}
% \etocrelease{1.2} adds experimental support (only tested with standard
% classes and few packages) for \csbc{locallistoffigures} and
% \csbc{locallistoftables}.  Did I say this is experimental? When \LaTeX{}
% will have added official hook to \csa{addcontentsline}, I will probably
% revise the way \etoc hacks into it for this \emph{experimental}
% functionality.
%
% As it is \textbf{experimental}, I think we can all agree I don't have
% to spend too much space documenting it in user manual.  So I shall be
% brief when I will get to it.  And I will remain brief here too.
%
% Now that \etoc uses package options, I will use \ctanpkg{kvoptions} as I am
% familiar with it.  I understand upstream \LaTeX{} now has support for
% key-value input, put I simply have had no time to read the interface.
% Besides not sure it was there for the |2020/10/01| required release.
%    \begin{macrocode}
\RequirePackage{kvoptions}
\SetupKeyvalOptions{prefix=Etoc@}
\newif\ifEtoc@lof
\DeclareVoidOption{lof}{\Etoc@loftrue
  \PackageInfo{etoc}{Experimental support for \string\locallistoffigures.\MessageBreak
                     Barely tested, use at own risk}%
}
\newif\ifEtoc@lot
\DeclareVoidOption{lot}{\Etoc@lottrue
  \PackageInfo{etoc}{Experimental support for \string\locallistoftables.\MessageBreak
                     Barely tested, use at own risk}%
}
\@ifclassloaded{memoir}{
\PackageInfo{etoc}
   {As this is with memoir class, all `...totoc' options\MessageBreak
    are set true by default.  Reported}
\DeclareBoolOption[true]{maintoctotoc}
\DeclareBoolOption[true]{localtoctotoc}
\DeclareBoolOption[true]{localloftotoc}
\DeclareBoolOption[true]{locallottotoc}
}{
\DeclareBoolOption[false]{maintoctotoc}
\DeclareBoolOption[false]{localtoctotoc}
\DeclareBoolOption[false]{localloftotoc}
\DeclareBoolOption[false]{locallottotoc}
}
\DeclareBoolOption[true]{ouroboros}
\DeclareDefaultOption{\PackageWarning{etoc}{Option `\CurrentOption' is unknown.}}
\ProcessKeyvalOptions*
\DisableKeyvalOption[action=error,package=etoc]{etoc}{lof}
\DisableKeyvalOption[action=error,package=etoc]{etoc}{lot}
\def\etocsetup#1{\setkeys{etoc}{#1}}
\def\etocifmaintoctotoc{\ifEtoc@maintoctotoc
                           \expandafter\@firstoftwo
                         \else
                           \expandafter\@secondoftwo
                         \fi}
\def\etociflocaltoctotoc{\ifEtoc@localtoctotoc
                           \expandafter\@firstoftwo
                         \else
                           \expandafter\@secondoftwo
                         \fi}
\def\etociflocalloftotoc{\ifEtoc@localloftotoc
                           \expandafter\@firstoftwo
                         \else
                           \expandafter\@secondoftwo
                         \fi}
\def\etociflocallottotoc{\ifEtoc@locallottotoc
                           \expandafter\@firstoftwo
                         \else
                           \expandafter\@secondoftwo
                         \fi}
\RequirePackage{multicol}
\def\etoc@{\etoc@}
\long\def\Etoc@gobtoetoc@ #1\etoc@{}
\newtoks\Etoc@toctoks
\def\Etoc@par{\par}
\def\etocinline{\def\Etoc@par{}}
\let\etocnopar\etocinline
\def\etocdisplay{\def\Etoc@par{\par}}
%    \end{macrocode}
% \csbc{etocglobaldefs} should be used only for special things such as TOC as a
% table; it should be put in a group to limit its scope. If used in the
% preamble, it must come \emph{after} \ctanpkg{tableof} if the latter is loaded too.
%    \begin{macrocode}
\let\Etoc@global\@empty
\def\etocglobaldefs{\let\Etoc@global\global\let\tof@global\global}
\def\etoclocaldefs {\let\Etoc@global\@empty\let\tof@global\@empty}
%    \end{macrocode}
% Some have been renamed at \etocrelease{1.2}.
%    \begin{macrocode}
\newif\ifEtoc@numbered
\newif\ifEtoc@hyperref
\newif\ifEtoc@parskip
\newif\ifEtoc@tocwithid
\newif\ifEtoc@standardlines
%    \end{macrocode}
% These next three added at \etocrelease{1.2}.  The latter two for handling
% compatibility layer with \ctanpkg{tocloft}
% and \ctanpkg{tocbibind}.\par^^A encore ce problème de ligne supp si plein!
%    \begin{macrocode}
\newif\ifEtoc@etocstyle
\newif\ifEtoc@classstyle
\newif\ifEtoc@keeporiginaltoc
\newif\ifEtoc@skipprefix
\newif\ifEtoc@isfirst
\newif\ifEtoc@localtoc
\newif\ifEtoc@skipthisone
\newif\ifEtoc@stoptoc
\newif\ifEtoc@notactive
\newif\ifEtoc@mustclosegroup
\newif\ifEtoc@isemptytoc
\newif\ifEtoc@checksemptiness
\def\etocchecksemptiness       {\Etoc@checksemptinesstrue }
\def\etocdoesnotcheckemptiness {\Etoc@checksemptinessfalse }
\newif\ifEtoc@notocifnotoc
\def\etocnotocifnotoc {\Etoc@checksemptinesstrue\Etoc@notocifnotoctrue }
\newcounter{etoc@tocid}
\def\Etoc@tocext{toc}
\def\Etoc@lofext{lof}
\def\Etoc@lotext{lot}
\let\Etoc@currext\Etoc@tocext
\def\etocifislocal{\ifEtoc@localtoc\expandafter\@firstoftwo\else
                                   \expandafter\@secondoftwo\fi
                  }
\def\etocifislocaltoc{\etocifislocal{\ifx\Etoc@currext\Etoc@tocext
                                     \expandafter\@firstoftwo\else
                                     \expandafter\@secondoftwo\fi}%
                                    {\@secondoftwo}%
                     }
\def\etocifislocallof{\etocifislocal{\ifx\Etoc@currext\Etoc@lofext
                                     \expandafter\@firstoftwo\else
                                     \expandafter\@secondoftwo\fi}%
                                    {\@secondoftwo}%
                     }
\def\etocifislocallot{\etocifislocal{\ifx\Etoc@currext\Etoc@lotext
                                     \expandafter\@firstoftwo\else
                                     \expandafter\@secondoftwo\fi}%
                                    {\@secondoftwo}%
                     }
%    \end{macrocode}
% Formerly a \LaTeX{} counter |etoc@tocdepth| was declared here but at
% \etocrelease{1.2} it has been replaced by macro storage.
%    \begin{macrocode}
\expandafter\def\csname Etoc@-3@@\endcsname {-\thr@@}
\expandafter\def\csname Etoc@-2@@\endcsname {-\tw@}
\expandafter\let\csname Etoc@-1@@\endcsname \m@ne
\expandafter\let\csname Etoc@0@@\endcsname  \z@
\expandafter\let\csname Etoc@1@@\endcsname  \@ne
\expandafter\let\csname Etoc@2@@\endcsname  \tw@
\expandafter\let\csname Etoc@3@@\endcsname  \thr@@
\expandafter\chardef\csname Etoc@4@@\endcsname  4
\expandafter\chardef\csname Etoc@5@@\endcsname  5
\expandafter\chardef\csname Etoc@6@@\endcsname  6
\expandafter\let\expandafter\Etoc@@six@@\csname Etoc@6@@\endcsname
\@ifclassloaded{memoir}{\def\Etoc@minf{-\thr@@}}{\def\Etoc@minf{-\tw@}}
\let\Etoc@none@@  \Etoc@minf
\expandafter\let\expandafter\Etoc@all@@ \csname Etoc@5@@\endcsname
\let\Etoc@dolevels\@empty
\def\Etoc@newlevel #1{\expandafter\def\expandafter\Etoc@dolevels\expandafter
        {\Etoc@dolevels\Etoc@do{#1}}}
%    \end{macrocode}
% \etocrelease{1.2} has done some refactoring here (and above), reducing
% the number of definitions.  Formerly each defined sectioning level got two
% macros assigned to it: one holding the numerical level (as chardef or count,
% or even tokens for |-\tw@|), the other in a textual representation such as
% |minusone|.  The latter do not get defined anymore.
%
% MEMO: the name space here is poor and I should definitely have used
% something such as \csa{Etoc@level@section}, not \csa{Etoc@section@@}.
%
% So \etocrelease{1.2} adds here \csbc{etocifunknownlevelTF} and
% \csbc{etoclevel} for a higher level interface, which may be used by third
% parties such as the \ctanpkg{yathesis} class and will allow \etoc at some
% point to modify its internal naming conventions.
%
% The |-\tw@| case needed for \csbc{Etoc@minf} (or for \ctanpkg{memoir}) means
% that two expansions of \csbc{etoclevel} do not always deliver a single
% token, it is at any rate always self-delimiting in assignments and
% \csa{ifnum} tests.  I hesitated using only explicit digit tokens by the way.
%
% The dummy sectioning levels ``all'' and ``none'' play a special role and
% will be declared by \csbc{etocifunknownlevelTF} as ``known''.  They should
% not be used as first argument of \csbc{etocsetlevel}...\par^^A TO FIX WHITELINE
%    \begin{macrocode}
\def\etocsetlevel#1#2{\expanded{\noexpand\etoc@setlevel{#1}{#2}}}%
\def\etoc@setlevel#1#2{%
   \edef\Etoc@tmp{\the\numexpr#2}%
   \if1\ifnum\Etoc@tmp>\Etoc@@six@@0\fi\ifnum\Etoc@tmp<-\tw@0\fi1%
      \in@{.#1,}{.none,.all,.figure,.table,.-3,.-2,.-1,.0,.1,.2,.3,.4,.5,.6,}%
%    \end{macrocode}
% Letter or other agnostic test.  First time I ever use \csa{@car} as I never
% paid attention to its existence and in more macro-coding intensive context
% such as \ctanpkg{xint} I use my own.
%    \begin{macrocode}
      \ifin@\else\if\@car#1\@nil @\in@true\fi\fi
      \ifin@
         \PackageWarning{etoc}
            {Sorry, but `#1' is forbidden as level name.\MessageBreak
             \if\@car#1\@nil @%
                (because of the @, especially as first character)\MessageBreak\fi
             Reported}%
      \else
        \etocifunknownlevelTF{#1}{\Etoc@newlevel{#1}}{}%
        \expandafter\let\csname Etoc@#1@@\expandafter\endcsname
                        \csname Etoc@\Etoc@tmp @@\endcsname
%    \end{macrocode}
% This is a mechanism to allow ``to toc'' entries to not break the core
% mechanism for local tables of contents (now also lists of) to correctly
% know their scope, when for example we have in a row
% \csbc{localtableofcontents}, \csbc{locallistoffigures},
% \csbc{locallistoftables} and each has created its ``to toc'' entry:
% main TOC will handle the |@<division>| as aliases to |<division>| and local
% TOCs and Lists Of will ignoer them.
%    \begin{macrocode}
        \expandafter\edef\csname Etoc@@#1@@\endcsname
                         {\expandafter\noexpand\csname Etoc@#1@@\endcsname}%
%    \end{macrocode}
% As ``to toc'' will use some \csa{addcontentsline}, we must make
% \ctanpkg{hyperref} happy.
%    \begin{macrocode}
        \expandafter\edef\csname toclevel@@#1\endcsname
                         {\expandafter\noexpand\csname toclevel@#1\endcsname}%
%    \end{macrocode}
% But we don't let \csa{toclevel\string#1} to \csa{Etoc@tmp}, with some
% hesitation.  The level defined by \csbc{etocsetlevel} should only be
% for interpretation for the contents of the |.toc| file.  If for some reason
% user wants to set all levels to six (i.e. not taken into account) except for
% some special ones, then modifying \csa{toclevel\string#1} could prevent the
% local TOC title to find a place in the bookmarks.
%    \begin{macrocode}
      \fi
   \else
      \PackageWarning{etoc}
         {Argument `\detokenize{#2}' of \string\etocsetlevel\space should
          represent\MessageBreak
          -2, -1, 0, 1, 2, 3, 4, 5, or 6 but evaluates to \Etoc@tmp.\MessageBreak
          The level of `#1' will be set to 6.\MessageBreak
          Tables of contents will ignore `#1' as long\MessageBreak
          as its level is 6.\MessageBreak
          Reported}%
      \etocifunknownlevelTF{#1}{\Etoc@newlevel{#1}}{}%
      \expandafter\let\csname Etoc@#1@@\endcsname\Etoc@@six@@
   \fi
}
%    \end{macrocode}
% Maybe let it first use \csbc{etocifunknownlevelTF} and raise in the
% ``unknown'' branch a suitable expandable error message (and return say |-3|)?
%
% I may also need for internal usage a variant for only numerical |#1| which be
% submitted to a \csa{the}\csa{numexpr}.  Not so far.
%    \begin{macrocode}
\def\etoclevel#1{\csname Etoc@#1@@\endcsname}
\def\etocifunknownlevelTF#1{\@ifundefined{Etoc@#1@@}}
\etocsetlevel{book}{-2}
\etocsetlevel{part}{-1}
\etocsetlevel{chapter}{0}
\etocsetlevel{section}{1}
\etocsetlevel{subsection}{2}
\etocsetlevel{subsubsection}{3}
\etocsetlevel{paragraph}{4}
\etocsetlevel{subparagraph}{5}
%    \end{macrocode}
% Prior to \etocrelease{1.2}, only under class \ctanpkg{memoir} was
% \csbc{etocsetlevel} used with |appendix|.  It does not seem to hurt to do it
% generally, with a check whether document class provides chapters.
%    \begin{macrocode}
\ifdefined\c@chapter
  \etocsetlevel{appendix}{0}
\else
  \etocsetlevel{appendix}{1}
\fi
\def\Etoc@do#1{\@namedef{l@@#1}{\csname l@#1\endcsname}}
\Etoc@dolevels
%    \end{macrocode}
% We do not do a formal \csbc{etocsetlevel}|{figure}{6}| and anyhow the user
% level interface forbids |figure| and |table| as first argument.
%    \begin{macrocode}
\let\Etoc@figure@@\Etoc@@six@@
\let\Etoc@table@@\Etoc@@six@@
%    \end{macrocode}
% \etocrelease{1.09g} adapts to \ctanpkg{hyperref} depending on whether the
% latter is at |7.00u| or earlier.  Indeed internal changes to
% \ctanpkg{hyperref} at |7.00u| broke \etoc.  Thanks to Denis~\textsc{Bitouzé}
% for reporting the issue.
%
% \etocrelease{1.1a} radically simplifies matters at \etoc core, and if these
% changes had been in place earlier there would have been no incompatibility
% with the \ctanpkg{hyperref} |7.00u| release.
%    \begin{macrocode}
\AtBeginDocument{%
\@ifpackageloaded{parskip}{\Etoc@parskiptrue}{}%
\@ifpackageloaded{hyperref}{\Etoc@hyperreftrue}{}%
}
\def\etocskipfirstprefix {\global\Etoc@skipprefixtrue }
%    \end{macrocode}
% Start of heart of \etoc's hacks into the execution of the |.toc| file
% commands.  It goes via a redefinition of \csa{contentsline} which will
% launch an extraction process leading to the construction of \csbc{etocname},
% \csbc{etocnumber}, and \csbc{etocpage}, then the styles as defined by user
% via \csbc{etocsetstyle} get executed in accordance to the levels.
%
% In passing \etoc is witness to the linear succession of sectioning levels
% and executes the \marg{start} and \marg{finish} parts of each used level at
% the right time (they are rather called ``|begin|'' and ``|end|'' in the code
% though).
%
% \etocrelease{1.2} did a complete rewrite of how \etoc creates virtually
% a nesting structure out of the flat succession of the \csa{contentsline}'s
% for various levels.  Ever since the first release this was based on using
% boolean flags, one for each level.  The flag was on if the level had been
% seen, hence its ``begin'' macro executed, but not yet its ``end'' macro.
% This is now replaced by a stack storage \csbc{Etoc@stackofends} which is
% simply, e.g. |{2}{0}{-3}{}|, to mean that first a chapter (|0|) was seen
% then a subsection (|2|).  The |{-3}{}| trail is for matters of avoiding
% brace removal in the implementation next (I could have replaced it by a
% single token being numerically |-3|).
%
% When a new level is encountered and set in \csbc{Etoc@level}, it is compared
% to the left most entry in the stack.  If higher, the ``begin'' macro is
% executed and the \csbc{Etoc@level} is pushed (as a digit with possibly a
% minus sign) to the left of the stack to record that the ``end'' macro is now
% on the queue for execution (sic).  If equal, nothing has to be done, if
% lower, the ``end'' macro of the left-most stored level is executed then this
% level is removed, and one proceeds with the next one, etc... legacy code was
% using a bunch of TeX conditionals rather, and I recall how in 2012 I was
% unfamiliar with its strange syntax and had lots of troubles; once I got
% something working it got frozen and basically did not change since then.
% The \etocrelease{1.2} implementation has replaced all of this by
% maintenance of a single ``stack'', which is more economical in terms of
% used macros and potentially more scalable too.
%
% About \csbc{Etoc@level} I have hesitated using only digit and sign tokens,
% but it is currently let to some \csa{chardef} (in exceptional
% \ctanpkg{memoir} case of |book| level it can expand to |-\tw@|, and there is
% also the \csa{m@ne} count).  \etocrelease{1.2} thus keeps defining such
% \csa{chardef}'s but has at least dropped auxiliary macros (see the
% definitions prior to \csbc{etocsetlevel}) which held some alphabetical
% denotations such as ``minusone'' or ``zero'', and the \emph{begin},
% \emph{prefix}, \emph{content} and \emph{end} macros associated with each
% level now use a digit (and sign perhaps) (see \csbc{etocsetstyle}).  With
% \csbc{Etoc@level} already storing directly such a digit, one would avoid a
% \csa{number} or \csa{the}\csa{numexpr} at some places, but would have to be
% more careful in the various \csa{ifnum}.
%
% This (always globally defined) \csbc{Etoc@level} must now never be set to
% the numerical value \texttt{6}: it is legal to add to the |.toc| file dummy
% sectioning levels associated to the numerical level \texttt{6} (such dummy
% sectioning will be ignored but can be assigned locally a non-ignored level
% for special effects) and if \csbc{Etoc@level} was, as prior to
% \etocrelease{1.2}, systematically set to the numerical level of the
% last seen \csa{contentsline}, this could cause \csbc{Etoc@@startlocaltoc} to
% fail to correctly set the ``local top''.  Indeed it now only has
% \csbc{Etoc@level} at his disposal, the legacy boolean flags being gone.
%
% The \csa{Etoc@isfirsttrue} was formally incorporated as last token of the
% ``begin'' macros as defined by \csbc{etocsetstyle}, but has been displaced
% by \etocrelease{1.2} to the code below.
%    \begin{macrocode}
\def\Etoc@updatestackofends#1\etoc@{\gdef\Etoc@stackofends{#1}}
\def\Etoc@stackofends{{-3}{}}
\def\Etoc@doendsandbegin{%
    \expandafter\Etoc@traversestackofends\Etoc@stackofends\etoc@
}
%    \end{macrocode}
% We compare the new level with those for which the \marg{start} parts of the
% \csbc{etocsetstyle} declarations have been executed to decide if it is time
% to execute their \marg{finish} parts.  In passing we set the boolean
% \csbc{ifEtoc@isfirst} which is needed for \csbc{etociffirst} and
% \csbc{etocxiffirst}.
%    \begin{macrocode}
\def\Etoc@traversestackofends#1{%
  \ifnum#1>\Etoc@level\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
  {\csname Etoc@end@#1\endcsname
   \Etoc@traversestackofends
  }%
  {\ifnum#1<\Etoc@level
     \csname Etoc@begin@\the\numexpr\Etoc@level\endcsname
     \Etoc@global\Etoc@isfirsttrue
     \edef\Etoc@tmp{{\the\numexpr\Etoc@level}}%
   \else
     \Etoc@global\Etoc@isfirstfalse
     \let\Etoc@tmp\@empty
   \fi
   \expandafter\Etoc@updatestackofends\Etoc@tmp{#1}%
  }%
}
%    \end{macrocode}
% Ever since the first release of \etoc, the code has to be careful that the
% |\Etoc@end@<level>| user defined macros may close groups. This is the reason
% why some assignments have to be done globally (|2015/03/08|).
%
% \etocrelease{1.1a} of |2023/01/14| implements a radical change to legacy
% core internals for compatibility with (attow future) \ctanpkg{hyperref}.
% Formerly \csbc{Etoc@etoccontentsline@} fetched only the first argument.  It
% now also fetches all four (the fourth argument of \csa{contentsline} is
% always present since \LaTeX{} |2020/10/01|).  The \csbc{Etoc@lxyz} used to
% receive only the two arguments (possibly hacked by \ctanpkg{hyperref}) of
% \csa{l@chapter}, \csa{l@section}, etc..., (these macros had been |\let| to
% \csbc{Etoc@lxyz}), and examined them to see if they were carrying
% hyperlinking data.  The \etocrelease{1.1a} and later version receives as
% third argument the fourth one of \csa{contentsline}, i.e.\@ the hyperlinking
% target, and adds the hyperlinking according to the status of
% \ctanpkg{hyperref}'s \csa{Hy@linktoc}.
%
% This is a breaking change if a user hacked \csa{contentsline} to do some
% specific pre-processing of the data, as this extra will now be ignored.  The
% kind of hack one can think of is perhaps to pre-process the section title to
% turn it into uppercase, this kind of things, but why do such things when one
% is using \etoc which precisely provides a general interface for such
% customization? Besides as the \LaTeX{} legacy set-up already mixes up in
% various ways name and number in the second argument of \csa{contentsline},
% doing such hacks in a non-breaking way was not easy, and could have broken
% \etoc easily anyhow.
%
% The major hacker was \ctanpkg{hyperref}...  Indeed in 2012 when I started
% work on \etoc, it was not clear to me how \ctanpkg{hyperref} would end up
% using the fourth argument of \csa{contentsline} and I did not want to spend
% too much time tracing hyperref code.  So I simply let \ctanpkg{hyperref} do
% its stuff, and added specific post-processing branches to unravel it.
% It looks quite dumb in retrospect (at this time the |.toc| file lines
% with \csa{contentsline} had either three or four arguments which contributed
% for the design decisions back then).
%
% All \ctanpkg{hyperref} specific branches are now gone, replaced by extra
% code added depending on the status of the \csbc{ifEtoc@hyperref} boolean.
% We also check the \csa{Hy@linktoc} \csa{chardef} status and, imitating
% \ctanpkg{hyperref}, do not hyperlink the page number argument if it turns out
% empty.  This maintains backwards-compatibility with earlier releases of
% \etoc.
%    \begin{macrocode}
\def\Etoc@etoccontentsline #1{%
  \let\Etoc@next\@gobblefour
  \ifnum\csname Etoc@#1@@\endcsname=\Etoc@@six@@
  \else
   \Etoc@skipthisonefalse
%    \end{macrocode}
% MEMO: the mechanism added to make
% added toc entries from ``list of'' titles invisible to the local tocs,
% will be with |#1| starting with an |@|.  In that case \csa{Etoc@\string#1@@}
% is not a \csa{chardef} but expands to one (or to a count or |-\tw@| perhaps,
% or a |\numexpr...\relax|).
%    \begin{macrocode}
   \global\expandafter\let\expandafter\Etoc@level\csname Etoc@#1@@\endcsname
%    \end{macrocode}
% The trick goes through a slight overhead here to filter out such special
% level names and do not make them update what will serve as top level for
% local tocs or listsof.  Formerly this was managed by booleans, then for
% \etocrelease{1.1d} (released as \etocrelease{1.2}) it got replaced by
% sole usage of \csbc{Etoc@level}, and finally a specific
% \csbc{Etoc@virtualtop} which gets its updates here.
%    \begin{macrocode}
   \if @\@car#1\@nil\else\global\let\Etoc@virtualtop\Etoc@level\fi
   \ifEtoc@localtoc
    \ifEtoc@stoptoc
      \Etoc@skipthisonetrue
    \else
     \ifEtoc@notactive
       \Etoc@skipthisonetrue
     \else
      \unless\ifnum\Etoc@level>\etoclocaltop
        \Etoc@skipthisonetrue
        \global\Etoc@stoptoctrue
      \fi
     \fi
    \fi
   \fi
   \ifEtoc@skipthisone
   \else
    \unless\ifnum\Etoc@level>\c@tocdepth
     \ifEtoc@standardlines
         \let\Etoc@next\Etoc@savedcontentsline
     \else
         \let\Etoc@next\Etoc@etoccontentsline@
     \fi
    \fi
   \fi
  \fi
  \Etoc@next{#1}%
}
%    \end{macrocode}
% Hesitation at \etocrelease{1.2} about having \csbc{Etoc@level} being
% always explicit digit and perhaps negative sign.  For now is a
% \csa{chardef} or \csa{m@ne} \csa{count} (perhaps |-\tw@| also).
%    \begin{macrocode}
\def\Etoc@etoccontentsline@ #1#2#3#4{%
    \Etoc@doendsandbegin
    \Etoc@global\edef\Etoc@prefix  {\expandafter\noexpand
         \csname Etoc@prefix@\the\numexpr\Etoc@level\endcsname }%
    \Etoc@global\edef\Etoc@contents{\expandafter\noexpand
         \csname Etoc@contents@\the\numexpr\Etoc@level\endcsname }%
    \ifEtoc@skipprefix \Etoc@global\def\Etoc@prefix{\@empty}\fi
    \global\Etoc@skipprefixfalse
    \Etoc@lxyz{#2}{#3}{#4}%
    \Etoc@prefix
    \Etoc@contents
}
%    \end{macrocode}
% A \textbf{breaking change} is made at \etocrelease{1.1a}: \csbc{etoclink}
% will always create an hyperlink, even in case of \ctanpkg{hyperref} being
% (possibly locally) configured to obey |linktoc=none|.  Formerly, in such
% case, \csbc{etoclink} added no hyperlink because \etoc identified the
% hyperlink target from the \ctanpkg{hyperref} hacked arguments of
% \csa{l@section} et al, rather than picking it from the fourth argument of
% \csa{contentsline}.
%
% Another \textbf{breaking change} (documented only at \etocrelease{1.1b}):
% all three of \csbc{etocthelinkedname}, \csbc{etocthelinkednumber}, and
% \csbc{etocthelinkedpage} are always hyperlinks (for the latter, only if page
% number is not empty to match \ctanpkg{hyperref} ways).  Formerly they obeyed
% the |linktoc| status, somewhat counterintuitively, but this meant that
% \csbc{etocname} etc...  were their robust variants, which meant one could
% store easily for later usage (see the documentation examples with
% ``treetoks'') their precise meaning.  The breaking change happened in part
% because I was fooled myself by the macro names, and refactored the code in
% two steps separated by months so in second step I forgot I had only
% provisory code.  And I decided finally to keep the breaking change.
%
% Under |linktoc=page| option, \ctanpkg{hyperref} has a ``feature'' to add one
% level of bracing to first argument of the \csa{l@section} etc macros.  So
% for \etoc |<1.1a| this meant some extra work to dig into such a possible
% brace pair to check if the entry was numbered.  At \etocrelease{1.1a}, the
% \ctanpkg{hyperref} modified \csa{contentsline} is not executed, hence there
% is no such complication.  But the trimming of the now unneeded branches was
% not yet done at \etocrelease{1.1a}, \etocrelease{1.1b}, and got completed
% only at \etocrelease{1.1c}, together with some renamings and refactoring.
%    \begin{macrocode}
\def\Etoc@lxyz #1#2#3{%
    \ifEtoc@hyperref
       \Etoc@global\def\etocthelink##1{\hyperlink{#3}{##1}}%
    \else
       \Etoc@global\let\etocthelink\@firstofone
    \fi
    \Etoc@global\def\etocthepage {#2}%
%    \end{macrocode}
% Prior to \etocrelease{1.1a} an hyperlink was incorporated into
% \csbc{etocthelinkedpage} only if \ctanpkg{hyperref} added an hyperlink to
% the page number, i.e.\@ under |linktoc=page| or |linktoc=all| (and a non
% empty page number).  With \etocrelease{1.1a}, the hyperlink is always added
% (if a non empty page number).
%    \begin{macrocode}
    \ifEtoc@hyperref
       \ifx\etocthepage\@empty
         \Etoc@global\let\etocthelinkedpage\@empty
       \else
         \Etoc@global\def\etocthelinkedpage{\hyperlink {#3}{#2}}%
       \fi
    \else
       \Etoc@global\let\etocthelinkedpage\etocthepage
    \fi
%    \end{macrocode}
% Define \csbc{etocthename} but this will perhaps be adjusted later if it is
% found out that the entry was numbered.
%    \begin{macrocode}
    \Etoc@global\def\etocthename{#1}%
%    \end{macrocode}
% Now we check if the entry is numbered and disentangle the number from the
% name to define correctly \csbc{etocthename} and \csbc{etocthenumber}.  The
% delimiter tokens were modified at \etocrelease{1.1c} for a slight
% optimization.  And secondary macros have less to do since the
% \etocrelease{1.1a} initiated refactoring.
%    \begin{macrocode}
    \futurelet\Etoc@getnb@token\Etoc@@getnb #1\hspace\etoc@
%    \end{macrocode}
% Even if \csbc{etocthenumber} was let to \csa{@empty}, it may happen in
% special circumstances (related to KOMA-script, see below) that
% \csbc{etocthename} got redefined.  We will thus use its current contents to
% define appropriately \csbc{etocthelinkedname}.
%
% In presence of \ctanpkg{hyperref} we let always \csbc{etocthelinkedname} and
% \csbc{etocthelinkednumber} (for a numbered entry) carry an hyperlink.  This
% is a \textbf{breaking change} at \etocrelease{1.1a}: formerly if the TOC (or
% the specific entry in the |.toc| file, as it is always possibly to inject
% \csa{hypersetup}) was typeset under |linktoc=none| or |linktoc=page| status,
% then no hyperlinks were incorporated.  This is how \csbc{etocthename} and
% \csbc{etocthenumber} are configured, but \csbc{etocthelinkedname} and
% \csbc{etocthelinkednumber} will since \etocrelease{1.1a} always be
% hyperlinked in presence of \ctanpkg{hyperref}.
%    \begin{macrocode}
    \ifEtoc@hyperref
      \def\Etoc@tmp##1##2{\Etoc@global\def##2{\hyperlink{#3}{##1}}}%
      \expandafter\Etoc@tmp\expandafter{\etocthename}\etocthelinkedname
      \ifEtoc@numbered
         \expandafter\Etoc@tmp\expandafter{\etocthenumber}\etocthelinkednumber
      \else
         \Etoc@global\let\etocthelinkednumber\@empty
      \fi
    \else
      \Etoc@global\let\etocthelinkedname  \etocthename
      \Etoc@global\let\etocthelinkednumber\etocthenumber
    \fi
%    \end{macrocode}
% Defaults in absence of \ctanpkg{hyperref}.  We externalize to another
% macro the \ctanpkg{hyperref} case switch.
%    \begin{macrocode}
    \Etoc@global\expandafter\let\csname etoclink \endcsname  \etocthelink
    \Etoc@global\expandafter\let\csname etocname \endcsname  \etocthename
    \Etoc@global\expandafter\let\csname etocnumber \endcsname\etocthenumber
    \Etoc@global\expandafter\let\csname etocpage \endcsname  \etocthepage
    \ifEtoc@hyperref
      \Etoc@lxyz@linktoc
    \fi
}
%    \end{macrocode}
% In presence of \ctanpkg{hyperref}, \etoc \etocrelease{1.1a} imports the
% \ctanpkg{hyperref} own logic and tests \csa{Hy@linktoc} to decide if
% \emph{name}, \emph{number} and \emph{page} get hyperlinks.  This adds a
% dependency that \csa{Hy@linktoc} should exist and have the expected
% interpretation.
% \begin{shaded}
% \setstretch{1}%
% \textbf{MEMO:} \emph{Matters of tagging will have to wait for \LaTeX\ itself
% to show me what it does in \csa{l@section} etc... so that I can imitate.}
%
% Updated 2023/02/26: this is now partly available and gave me an idea of
% what will be needed here.  As the \etoc way goes through none of the
% \LaTeX{} hook points, I will have to add the suitable \csa{UseHook} at
% various places, after having stored the \csa{contentsline} original
% arguments in the same macros as the \LaTeX{} new kernel code will do.
%
% Some difficulties though in perspective as \etoc separates name and number
% and has no concept akin to \csa{@dottedtocline}.  Also if the user employs
% \csbc{etocsetstyle} with \csa{l@section}, hooks may be executed twice if I
% put them not in \csbc{etocname} but in the \marg{prefix} and \marg{content}
% parts for each level.\par
% \end{shaded}
%    \begin{macrocode}
\def\Etoc@lxyz@linktoc{%
    \ifcase\Hy@linktoc
        % none: nothing to do
    \or % section (aka name for etoc): link name and number
      \Etoc@global\expandafter\let\csname etocname   \endcsname\etocthelinkedname
      \Etoc@global\expandafter\let\csname etocnumber \endcsname\etocthelinkednumber
    \or % page
      \Etoc@global\expandafter\let\csname etocpage   \endcsname\etocthelinkedpage
    \else % all
      \Etoc@global\expandafter\let\csname etocname   \endcsname\etocthelinkedname
      \Etoc@global\expandafter\let\csname etocnumber \endcsname\etocthelinkednumber
      \Etoc@global\expandafter\let\csname etocpage   \endcsname\etocthelinkedpage
    \fi
}
%    \end{macrocode}
% Now for the disentangling of the ``number'' from the ``name''.
%
% At some point we will pick up the first token and check if it is
% \csa{numberline} or like token to identify a numbered entry.
% But this step can cause brace removal so we \csa{futurelet} to
% peek ahead.
%
% Prior to \etocrelease{1.1a} it could be possible that the first token following
% \csbc{Etoc@@getnb} was an opening brace and nevertheless the entry was
% numbered, because of a \ctanpkg{hyperref} ``feature'' in case of
% |linktoc=page| option.  But at \etocrelease{1.1a}, \etoc handles directly the argument
% of \csa{contentsline} so the presence of an opening brace implies the entry
% is not numbered.  For some reason \etocrelease{1.1a} kept the extra code to check in
% case the next token was an opening brace whether the whole entry was braced,
% which would have been indicative in the past (but not at \etocrelease{1.1a}) of a
% |linktoc=page| context (\etoc prior to \etocrelease{1.1a} never tested the value of
% \csa{Hy@linktoc} as it did not want to be dependent on details of
% \ctanpkg{hyperref} handling of options).  This legacy, now superfluous, code
% branch is removed at \etocrelease{1.1c}, bringing some simplification here, in
% particular the removal of an \csa{ifEtoc@bracedname} boolean.  Also, when
% branching from here to the \csbc{Etoc@getnb@nonbr}, we won't need to check
% if the entry had a special ``Part'' syntax, which is another simplification.
%
% The |@nonbr| means ``no number'', and is not to be misinterpreted as
% ``non braced''... (this was more confusing to the author on return to
% \etoc code, when it still had branches
% handling issues described above with an extra brace pair).
%    \begin{macrocode}
\def\Etoc@@getnb {%
    \let\Etoc@next\Etoc@getnb
    \ifx\Etoc@getnb@token\@sptoken\let\Etoc@next\Etoc@getnb@nonbr\fi
    \ifx\Etoc@getnb@token\bgroup  \let\Etoc@next\Etoc@getnb@nonbr\fi
    \Etoc@next
}
%    \end{macrocode}
% \etocrelease{1.08n} tries to handle reasonably the \csa{nonumberline} of
% \ctanpkg{KOMA-script}.  If it expands to |\numberline{}|, \etoc will
% consider the line numbered with an empty number (afaict, the meaning of
% \csa{nonumberline} is either empty or \csa{numberline}|{}|).  This got
% modified at \etocrelease{1.1c} (see below).
%
% At \etocrelease{1.09f} we get rid of the \csa{nonumberline} from inside
% \csbc{etocthename} when it has empty meaning, so the expansion of the latter
% can safely be delayed by custom section styles (for example if the build up
% some token list to be executed later not immediately).  \etocrelease{1.1c} fixes a
% regression committed at \etocrelease{1.1a}: for a \csa{nonumberline} with empty
% meaning the \csbc{etocthelinkedname} did not end up hyperlinked.
%
% A change, almost a bug fix, but the former behavior was actually
% deliberate, at \etocrelease{1.1c} regarding the KOMA-script \csa{nonumberline}
% token: formerly, when it expanded to \csa{numberline}|{}| (this
% can happen only when the TOC is typeset in compatibility mode for
% the global display) then \csbc{ifEtoc@numbered} was set to true.
% But this is only a KOMA-script typesetting thing, and should not
% have influenced \etoc's decisions when its (user or package) own
% line styles are used: at \etocrelease{1.1c} it is thus decided that in such
% circumstances the \csbc{etocifnumbered} will pick the false
% branch, and the empty \csbc{etocthelinkednumber} will not be
% hyperlinked.
%
% No brace removal of the |#1| here a priori possible because we took care to
% check that \csbc{Etoc@getnb} was not followed by either a space or an
% opening brace.
%
% The \csbc{Etoc@@getit} branch for ``Parts'' used to be executed from inside
% \csbc{Etoc@lxyz}.  At \etocrelease{1.1c} we jump directly to it from here.
%    \begin{macrocode}
\def\Etoc@getnb #1{%
    \in@{#1}{\numberline\chapternumberline\partnumberline\booknumberline}%
    \ifin@
       \let\Etoc@next\Etoc@getnb@nmbrd
    \else
       \ifnum\Etoc@level=\m@ne
           \let\Etoc@next\Etoc@@getit
       \else
           \let\Etoc@next\Etoc@getnb@nonbr
       \fi
%    \end{macrocode}
% Remove a KOMA-script \csa{nonumberline} token if present and process the
% entry always as not numbered (see above comments).  Prior to \etocrelease{1.1c}, the
% code branched according to the meaning of the \csa{nonumberline} token,
% which was a bit silly.
%    \begin{macrocode}
       \in@{#1}{\nonumberline}%
       \ifin@
         \let\Etoc@next\Etoc@getnb@nonumberline
       \fi
    \fi
    \Etoc@next #1%
}
%    \end{macrocode}
% Prior to \etocrelease{1.1a}, \csbc{etocthelinkedname} and \csbc{etocthelinkednumber}
% (for a numberd entry) were defined to carry links only if an hyperlink was
% actually found, now they are defined in \csbc{Etoc@lxyz} to always provide
% the hyperlinking to the target title in the document.
%
% \etocrelease{1.1a} and \etocrelease{1.1b} still had here some superfluous code which was trimmed at
% \etocrelease{1.1c}.
%
% Also, \etocrelease{1.1c} fixes here a brace removal bug (which had always been there I
% guess): if the numbered heading title was braced one level of bracing was
% removed.  The bug had no effect in a document using \ctanpkg{hyperref} (and
% its default |linktoc| setting) as the \csa{hyperlink} wrapper limited the
% scope.  But in a document without hyperref it would have been seen with
% input such as |\section{{\color{blue}Stuff}}|.
%    \begin{macrocode}
\def\Etoc@getnb@nmbrd #1#2{%
    \Etoc@global\Etoc@numberedtrue
    \Etoc@global\def\etocthenumber {#2}%
    \Etoc@getnb@nmbrd@getname\@empty
}%
%    \end{macrocode}
% We added an \csa{@empty} token to prevent brace removal.
%    \begin{macrocode}
\def\Etoc@getnb@nmbrd@getname #1\hspace\etoc@ {%
    \Etoc@global\expandafter\def\expandafter\etocthename\expandafter{#1}%
}
%    \end{macrocode}
% Not numbered entry.
%    \begin{macrocode}
\def\Etoc@getnb@nonbr #1\etoc@ {%
    \Etoc@global\Etoc@numberedfalse
    \Etoc@global\let\etocthenumber \@empty
}
%    \end{macrocode}
% Special KOMA branch: |#1| starts with \csa{nonumberline} (prior to \etocrelease{1.1c}
% the |#1| would have already lost this token, and this branch was executed
% only in case \csa{nonumberline} had empty meaning).  We need to remove this
% token from |#1| and redefine \csbc{etocthename}.
%
% \etocrelease{1.1a} code still had here some complications with a ``braced name'' branch
% which was in fact never executed at \etocrelease{1.1a}, as the \ctanpkg{hyperref} hacks
% into the expansion of \csa{contentsline} were not executed.  These now
% unneeded complications got removed at \etocrelease{1.1c}.
%
% \etocrelease{1.1c} also fixes a regression caused by \etocrelease{1.1a} in this branch: the
% \csbc{etocthelinkedname} had lost its hyperlink.
%
% The \csa{nonumberline} extra token guarantees no brace stripping here.
%    \begin{macrocode}
\def\Etoc@getnb@nonumberline #1\hspace\etoc@ {%
    \Etoc@global\Etoc@numberedfalse
    \Etoc@global\let\etocthenumber \@empty
    \Etoc@global\expandafter\def\expandafter\etocthename\expandafter{\@gobble#1}%
}
%    \end{macrocode}
% This branch handles the peculiar ``Part'' syntax.  No brace stripping
% possible here when grabbing |#1|, due to previous checks that it does
% not start by a space token or an opening brace.
%
% \etocrelease{1.1c} handles this as a sub-branch from \csbc{Etoc@@getnb} which brings
% simplifications.  Also the code has been somewhat strengthened so as to
% avoid in later processing a brace removal issue on the name (which was a bug
% of legacy earlier code), when it turns our we are handling a numbered Part
% indeed.
%
% The whole thing is anyhow quite fragile due to \LaTeX{}'s handling by
% standard classes of |.toc| file entries for parts being even more already
% pre-formatted for typesetting than for other levels.
%    \begin{macrocode}
\def\Etoc@@getit #1\hspace#2{%
    \ifx\etoc@#2%
      \Etoc@global\Etoc@numberedfalse
      \Etoc@global\let\etocthenumber \@empty
    \else
      \Etoc@global\Etoc@numberedtrue
      \Etoc@global\def\etocthenumber {#1}%
      \expandafter\Etoc@getit@getname \expandafter\@empty
    \fi
}
%    \end{macrocode}
% Chain of \csa{expandafter}'s to get rid of the added \csa{@empty} token to
% avoid a brace removal.  And this is the end of the \etocrelease{1.1a} refactoring,
% completed at \etocrelease{1.1c}.
%    \begin{macrocode}
\def\Etoc@getit@getname #1\hspace\etoc@ {%
    \Etoc@global\expandafter\def\expandafter\etocthename\expandafter{#1}%
}
%    \end{macrocode}
% place-holder
%    \begin{macrocode}
\let\etocthename   \@empty
\let\etocthenumber \@empty
\let\etocthepage   \@empty
\let\etocthelinkedname   \@empty
\let\etocthelinkednumber \@empty
\let\etocthelinkedpage   \@empty
\let\etocthelink   \@firstofone
\DeclareRobustCommand*{\etocname}  {}
\DeclareRobustCommand*{\etocnumber}{}
\DeclareRobustCommand*{\etocpage}  {}
\DeclareRobustCommand*{\etoclink}  {\@firstofone}
\DeclareRobustCommand*{\etocifnumbered}
   {\ifEtoc@numbered\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi}
\expandafter\let\expandafter\etocxifnumbered\csname etocifnumbered \endcsname
\DeclareRobustCommand*{\etociffirst}
   {\ifEtoc@isfirst\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi}
\expandafter\let\expandafter\etocxiffirst\csname etociffirst \endcsname
\def\Etoc@readtoc {%
  \ifeof \Etoc@tf
  \else
     \read \Etoc@tf to \Etoc@buffer
     \Etoc@toctoks=\expandafter\expandafter\expandafter
       {\expandafter\the\expandafter\Etoc@toctoks\Etoc@buffer}%
     \expandafter\Etoc@readtoc
  \fi
}
%    \end{macrocode}
% \etocrelease{1.07m} moves the reading of the toc file At Begin Document. Needed for
% Babel activated characters.\par^^A extra \par needed to avoid empty line...
%    \begin{macrocode}
\Etoc@toctoks {}% (superfluous, but for clarity)
\AtBeginDocument{\IfFileExists{\jobname.toc}
    {{\endlinechar=\m@ne
      \makeatletter
      \newread\Etoc@tf
      \openin\Etoc@tf\@filef@und
      \Etoc@readtoc
      \global\Etoc@toctoks=\expandafter{\the\Etoc@toctoks}%
      \closein\Etoc@tf}}
    {\typeout{No file \jobname.toc.}}}
\def\Etoc@openouttoc{%
  \ifEtoc@hyperref
   \ifx\hyper@last\@undefined
    \IfFileExists{\jobname .toc}
      {\Hy@WarningNoLine
         {old toc file detected; run LaTeX again (cheers from `etoc')}%
       \global\Etoc@toctoks={}%
      }
      {}%
   \fi
  \fi
  \if@filesw
   \newwrite \tf@toc
   \immediate \openout \tf@toc \jobname .toc\relax
  \fi
  \global\let\Etoc@openouttoc\empty
}
%    \end{macrocode}
% The |\gdef\Etoc@stackofends{{-3}{}}| is in theory superfluous as normally
% this stack should always have been restored on exit to its initial state,
% but...
%
% It would perhaps be better to issue here \csa{Etoc@notactivetrue}, prior to
% |\the\Etoc@toctoks| but it is up to the caller macros to do it.
% \csbc{Etoc@minf} is a level which is lower (i.e. more encompassing than all
% others), so numerically \texttt{-2} for standard classes and \texttt{-3} for
% \ctanpkg{memoir} class.
%
% The \csbc{Etoc@doendsandbegin} will not try to execute a (non-existing)
% ``begin'' macro for the level \texttt{-3}.
%    \begin{macrocode}
\def\Etoc@toctoc{%
  \gdef\Etoc@stackofends{{-3}{}}%
  \global\let\Etoc@level\Etoc@minf
  \global\let\Etoc@virtualtop\Etoc@minf
  \the\Etoc@toctoks
  \ifEtoc@notactive
  \else
   \gdef\Etoc@level{-\thr@@}%
   \Etoc@doendsandbegin
  \fi
}
%    \end{macrocode}
% Memo: \csbc{etoclocaltop} has only meaningful meaning when the toc is local
% and is ``active''. Except that I used a "notactive" flag to torture myself,
% so: has the \csbc{ifEtoc@notactive} flag set to |false|.
%
% The \etocrelease{1.2} removal of usage of boolean flags associated to
% the levels has made the next definition more succinct.  Their former r\^ole is
% picked up by \csbc{Etoc@level}.
%
% MEMO: the \csbc{etoclocaltableofcontentshook} has been added during development
% \etocrelease{1.2} probably for reasons of symmetry with handling of the
% local ``lists of'' code, but at time of release I can't remember clearly.
% Hesitation where to put it exactly.
%
% \etocrelease{1.2} adds a \csbc{Etoc@@startlocaltochook} for a refactoring of
% \csbc{localtableofcontentswithrelativedepth}.  It also serves to make the
% emptiness check with local ``lists of'', as will be seen further down.
%    \begin{macrocode}
\def\Etoc@@startlocaltoc#1#2{%
    \ifEtoc@localtoc
       \ifnum #1=#2\relax
          \global\let\etoclocaltop\Etoc@virtualtop
          \Etoc@@startlocaltochook
          \etoclocaltableofcontentshook
%    \end{macrocode}
% The \csbc{ifEtoc@etocstyle} boolean is true when \etoc is left in its default
% mode (no usage of \csbc{etocsettocstyle} or \csbc{etocclasstocstyle}).  It
% inhibits \csbc{Etoc@tableofcontents} from using the specified
% \marg{before\string_toc} and \marg{after\string_toc} from usage of
% \csbc{etocsettocstyle}.  And here we can insert the code we wish to do the
% title.
%
% \begin{shaded}
% \setstretch{1}%
% \textbf{MEMO}: for legacy reason \etoc shares a lot of code between global TOC and
% local TOCs.  But it would probably have been better to separate the two and
% provide an \csa{etocsetlocaltocstyle} that the user can use in preamble.
% As it stands \csbc{etocsettocstyle} if used in preamble also influences the
% global TOC, so basically one has to use it again after it (if it comes first
% in the document).
% \end{shaded}
%
% The \csa{ifEtoc@ouroboros} mechanism when it is set to false appears rather
% audacious.
%    \begin{macrocode}
          \ifEtoc@etocstyle
              \etocetoclocaltocmaketitle
          \fi
          \ifx\Etoc@aftertitlehook\@empty
          \else
            \ifEtoc@localtoctotoc
              \ifEtoc@ouroboros
              \else
                \let\Etoc@tmp\contentsline
                \def\contentsline{\let\contentsline\Etoc@tmp\@gobblefour}%
              \fi
            \fi
          \fi
          \global\Etoc@notactivefalse
       \fi
    \fi
}
\let\etoc@startlocaltoc\@gobble
\let\Etoc@@startlocaltoc@toc\Etoc@@startlocaltoc
\let\Etoc@@startlocaltochook\@empty
\def\etocdivisionnameatlevel#1{%
    \ifcase\numexpr#1\relax
             \ifdefined\c@chapter chapter\else section\fi%
         \or section%
         \or subsection%
         \or subsubsection%
         \or paragraph%
         \or subparagraph%
         \or empty%
    \else\ifnum\numexpr#1<\m@ne
             book%
         \else
             part%
         \fi
    \fi
}
\def\etoclocalheadtotoc#1#2{\addcontentsline{toc}{@#1}{#2}}
\def\etocglobalheadtotoc{\addcontentsline{toc}}
%    \end{macrocode}
% I have coded this so that it can be copied pasted to a user document and
% customized at will.  The \csa{par} is in case of a local TOC in a
% subsubsection or deeper, the heading will then be rendered as a paragraph
% heading...\par^^A sigh with extra line if full here
%    \begin{macrocode}
\providecommand*\UseName{\@nameuse}
\def\etocetoclocaltocmaketitle{%
    \UseName{\etocdivisionnameatlevel{\etoclocaltop+1}}*{\localcontentsname}%
    \ifnum\etoclocaltop>\tw@\mbox{}\par\fi
    \etociflocaltoctotoc
      {\etocifisstarred
         {}% star variant, do not add to toc
         {\etoclocalheadtotoc
           {\etocdivisionnameatlevel{\etoclocaltop+1}}%
           {\localcontentsname}%
         }%
      }%
      {}%
}%
%    \end{macrocode}
% In dev, I used \csa{etoc} prefix for the next two, but I
% decided to drop it for release.
%    \begin{macrocode}
\def\localcontentsname  {\contentsname}%
\let\etoclocaltableofcontentshook\@empty
%    \end{macrocode}
% The big thing at \etocrelease{1.2}: experimental support code for
% \csbc{locallistoffigures} and \csbc{locallistoftables}!  There were two
% possibilities to implement the `localtoc' mechanism: either add some extra
% things to the |.lof| and |.lot| files, or get their data duplicated in the
% |.toc| file.  I have chosen for time being the latter path, hence this goes
% via hacking into \csa{addcontentsline} and it must be the case that the
% document class uses it (from \csa{caption}).  If some package has modified
% the implementation of captions of figures and tables and insertes data in
% the |.lof| or |.lot| files directly via \csa{addtocontents} for example
% and not via \csa{addcontentsline}, then the \etoc mechanism will fail.
%    \begin{macrocode}
\if1\ifEtoc@lof0\fi\ifEtoc@lot0\fi1%
\else
\AtBeginDocument{%
  \let\Etoc@originaladdcontentsline\addcontentsline
  \def\addcontentsline{\Etoc@hackedaddcontentsline}%
}%
\fi
%    \end{macrocode}
% \csa{expanded} is by now available in all engines, I think.
%    \begin{macrocode}
\def\Etoc@hackedaddcontentsline#1{%
  \expanded{\noexpand\in@{.#1,}{\ifEtoc@lof.lof,\fi\ifEtoc@lot.lot,\fi}}%
  \ifin@\expandafter\Etoc@hackedaddcontentsline@i
   \else\expandafter\Etoc@originaladdcontentsline
  \fi
  {#1}%
}
%    \end{macrocode}
% This business of \csa{protected@file@percent} is not really needed as anyhow
% \etoc reads the |.toc| file with no space token from end of lines.

%    \begin{macrocode}
\def\Etoc@hackedaddcontentsline@i#1#2#3{%
    \expanded{\noexpand\in@{.#1;#2,}}{.lof;figure,.lot;table,}%
    \ifin@
    \addtocontents {toc}{%
      \protect\contentsline{#2}{#3}{\thepage}{\ifEtoc@hyperref\@currentHref\fi}%
      \ifdefined\protected@file@percent\protected@file@percent\fi
    }%
    \fi
    \Etoc@originaladdcontentsline{#1}{#2}{#3}%
}
%    \end{macrocode}
% We will simply let \csbc{locallistoffigures} and \csbc{locallistoftables}
% use \csbc{localtableofcontents}.  We need some dedicated variant of
% \csbc{Etoc@@startlocaltoc}.  Hesitation where to put
% \csbc{Etoc@@startlocaltochook} which has multiple usages.
%    \begin{macrocode}
\def\Etoc@@startlocallistof#1#2#3{%
    \ifEtoc@localtoc
       \ifnum #2=#3\relax
          \global\let\etoclocaltop\Etoc@virtualtop
          \global\Etoc@notactivefalse
          \Etoc@@startlocaltochook
          \csname etoclocallistof#1shook\endcsname
          \ifEtoc@etocstyle
              \csname etocetoclistof#1smaketitle\endcsname
          \fi
       \fi
    \fi
}
\def\Etoc@@startlocallistof@setlevels#1{%
%    \end{macrocode}
% |#1| is |figure| or |table|.
%
% \csbc{etoclocaltop} represents the level which will stop the local ``list
% of'' contents.  I hesitated whether local ``lists of'' should obey the
% |tocdepth|, especially a varying one.  Finally at last minute I opted for
% ``Yes'', so in the end no alteration of |tocdepth| will be done here.  We
% will set the level to have value
% \centeredline{|min(1, |\csbc{etoclocaltop}|+1)|}
% At least |1|, because it really would not make
% sense to show figure entries as chapter entries for a local list of figures
% in a Part (if the user has for example set the
% \csbc{etoclocallistoffigureshook} to do nothing, so that the line styles as
% configured via \csbc{etocsetstyle} are not avoided).  And it must be greater
% than \csbc{etoclocaltop} else such an entry would terminate the scope of the
% local contents.
%
% In the default context which has issued via
% \csbc{etoclocallistoffigureshook} a local \csbc{etocstandardlines}, the
% actual value of the level only has a ``all or nothing'' meaning: if it is
% greater than |tocdepth| then the \csbc{Etoc@etoccontentsline} will not call
% \csa{contentsline}, else it will and then the code from document class will
% kick in.  The |article| class defines \csa{l@figure} as
% \centeredline{|\@dottedtocline {1}{1.5em}{2.3em}|}
% And we are here in a context where necessarily |tocdepth| is at least |1|
% (if it was |0| or less, as the level has been set to at least |1|, the entry
% would have been filtered out earlier by \csbc{Etoc@etoccontentsline}), so
% the line will show.  And if \csbc{etoclocallistoffigureshook} was modified
% and did not issue \csbc{etocstandardlines} and we are in this situation that
% the |tocdepth| comparison did not inhibit the entry, then it will show too,
% at least if the line style does not say to do nothing (notice that the \etoc
% fall-back line styles are configured to do nothing for paragraph and
% subparagraph entries).
%
% On the other hand if the |tocdepth| inhibits entries of level
% \csbc{etoclocaltop}|+1|, then a \csbc{localtableofcontents} at this level
% would display no contents, so why should it not also mute
% \csbc{locallistoffigures}?
%
% This change to the level \csbc{Etoc@figure@@} or \csbc{Etoc@table@@} is done
% only locally, no need to worry about collaterals after the ``List of''.
%    \begin{macrocode}
          \ifnum\etoclocaltop<\z@
              \expandafter\let\csname Etoc@#1@@\endcsname\@ne
          \else
              \expandafter\let\csname Etoc@#1@@\expandafter\endcsname
                              \csname Etoc@\the\numexpr\etoclocaltop+\@ne @@\endcsname
          \fi
%    \end{macrocode}
% We now make invisible all level names whose numerical level would have
% allowed them to show in these contents.  |figure| and |table| are never
% included in the \csbc{Etoc@dolevels} no danger to cancel them out.  The
% special level names |@section| etc... which are inserted by headings of
% local ``lists of'' or local TOCs under \etocoption{localloftotoc} and other
% options have been made invisible by \csbc{Etoc@listofhook}, no need to do
% anything about them here.
%    \begin{macrocode}
          \def\Etoc@do##1{%
              \ifnum\etoclevel{##1}>\etoclocaltop
                     \expandafter\let\csname Etoc@##1@@\endcsname\Etoc@@six@@
              \fi}%
          \Etoc@dolevels
}
%    \end{macrocode}
% Let's for time being configure the figure and table lines to be rendered as
% in class default.
%
% Ah, I remember why I added \csbc{etoclocaltableofcontentshook} above.  It is
% by symmetry as I had defined those next two already.
%    \begin{macrocode}
\def\etoclocallistoffigureshook{\etocstandardlines}
\def\etoclocallistoftableshook {\etocstandardlines}
%    \end{macrocode}
% Here is some info about usage of \csbc{etoclocallistoffigureshook}, for
% those who end up here from having clicked on the name from the user
% manual.  Its default as above means to use the class default for lines in
% \csa{listoffigures}.  If you redefine it to be empty, the effect is that
% (except of course if \csbc{etocstandardlines} has been issued globally) the
% figure lines will adopt the style configured for level
% \csbc{etoclocaltop}|+1| (or more precisely the minimum of that and of |1|).
% You can definitely put into the hook some
% \centeredline{\csbc{etocsetstyle}|{\number\etoclevel{figure}}{}{}{...}{}|}
% where the dots represent some code with \csbc{etocnumber}, \csbc{etocname},
% \csbc{etocpage}, itself possibly querying \csbc{etoclevel}|{figure}|, or
% perhaps \csbc{etoclocaltop} to know the actual depth (which may the one of a
% Part which can thus be distinguished from being in a Chapter, whereas 
% \csa{number}\csbc{etoclevel}|{figure}| will give |1| in both cases).
%
% There is variant which is to maintain the default \csbc{etocstandardlines}
% in the hook and then re-define the kernel macro \csa{l@figure} to do the
% desired thing.  For example the default with |article| is for \csa{l@figure}
% to do {|\@dottedtocline {1}{1.5em}{2.3em}|} so you can do some
% variant where the second and third argument (numwidth and indent) are set
% according to \csbc{etoclocaltop}.
%
% I hope the above explanations help, they appear too advanced for inclusion
% in the user manual so I give them here.
%
% In dev, I used \csa{etoc} prefix here, but I decided to drop it for release.
%    \begin{macrocode}
\def\locallistfigurename{\listfigurename}
\def\locallisttablename {\listtablename}
%    \end{macrocode}
% Same observations as for \csbc{etocetoclocaltocmaketitle}.
%    \begin{macrocode}
\def\etocetoclistoffiguresmaketitle{%
    \UseName{\etocdivisionnameatlevel{\etoclocaltop+1}}*{\locallistfigurename}%
    \ifnum\etoclocaltop>\tw@\mbox{}\par\fi
    \etociflocalloftotoc
      {\etocifisstarred
         {}% star variant, do not add to toc
         {\etoclocalheadtotoc
           {\etocdivisionnameatlevel{\etoclocaltop+1}}%
           {\locallistfigurename}%
         }%
      }%
      {}%
}%
\def\etocetoclistoftablesmaketitle{%
    \UseName{\etocdivisionnameatlevel{\etoclocaltop+1}}*{\locallisttablename}%
    \ifnum\etoclocaltop>\tw@\mbox{}\par\fi
    \etociflocallottotoc
      {\etocifisstarred
         {}% star variant, do not add to toc
         {\etoclocalheadtotoc
           {\etocdivisionnameatlevel{\etoclocaltop+1}}%
           {\locallisttablename}%
         }%
      }%
      {}%
}%
%    \end{macrocode}
% The local lists of do support the |\label/\ref| syntax as we are careful
% here to position \csbc{localtableofcontents} as last token.
%
% The reset to \csa{@empty} of the \csa{Etoc@listofreset} is not strictly
% needed as the other things can always be done with no harm.
%    \begin{macrocode}
\let\Etoc@listofreset\@empty
%    \end{macrocode}
% Memo: \csa{ext@toc} defined in KOMA and memoir but not in the standard classes.
%    \begin{macrocode}
\def\locallistoffigures{%
    \ifEtoc@lof
      \def\Etoc@listofreset{%
          \let\Etoc@currext\Etoc@tocext
          \let\Etoc@@startlocaltoc\Etoc@@startlocaltoc@toc
          \let\Etoc@@startlocaltochook\@empty
          \let\Etoc@listofreset\@empty
%    \end{macrocode}
% The \csbc{Etoc@listofhook} is executed by \csbc{localtableofcontents}.  It
% will be used here to let local ``lists of'' ignore all the special |.toc|
% entries whose level names start with a |@|.  This is to avoid the scope
% limiting detection of the local list of figures or tables from being
% influenced by another list of, such as a list of tables following a list of
% figures which has put its title inside the |.toc| due to |locallottotoc|
% option of \etoc.
%    \begin{macrocode}
          \let\Etoc@listofhook\@empty
          }%
      \let\Etoc@currext\Etoc@lofext
      \def\Etoc@@startlocaltoc{\Etoc@@startlocallistof{figure}}%
      \def\Etoc@@startlocaltochook{\Etoc@@startlocallistof@setlevels{figure}}%
      \def\Etoc@listofhook{%
        \def\Etoc@do####1{%
          \expandafter\let\csname Etoc@@####1@@\endcsname\Etoc@@six@@
        }%
        \Etoc@dolevels
      }%
      \expandafter\localtableofcontents
    \else
      \PackageError{etoc}{%
        \string\locallistoffigures \on@line\space but\MessageBreak
        package was loaded without `lof' option}%
        {Try again with \string\usepackage[lof]{etoc}}%
    \fi
}
\def\locallistoftables{%
    \ifEtoc@lot
      \def\Etoc@listofreset{%
          \let\Etoc@currext\Etoc@tocext
          \let\Etoc@@startlocaltoc\Etoc@@startlocaltoc@toc
          \let\Etoc@@startlocaltochook\@empty
          \let\Etoc@listofreset\@empty
          \let\Etoc@listofhook\@empty
          }%
      \let\Etoc@currext\Etoc@lotext
      \def\Etoc@@startlocaltoc{\Etoc@@startlocallistof{table}}%
      \def\Etoc@@startlocaltochook{\Etoc@@startlocallistof@setlevels{table}}%
      \def\Etoc@listofhook{%
        \def\Etoc@do####1{%
          \expandafter\let\csname Etoc@@####1@@\endcsname\Etoc@@six@@
        }%
        \Etoc@dolevels
      }%
      \expandafter\localtableofcontents
    \else
      \PackageError{etoc}{%
        \string\locallistoftable \on@line\space but\MessageBreak
        package was loaded without `lot' option}%
        {Try again with \string\usepackage[lot]{etoc}}%
    \fi
}
%    \end{macrocode}
% \csbc{Etoc@tocid} is the number of the toc (possibly gotten via a |\ref|
% following a \csbc{tableofcontents}), or it is |\z@| if the emptiness test is
% from a global toc. Until the compilations stabilize, some local TOCs can get
% printed at wrong locations naturally and emptiness tests can not be trusted
% either.
%
% Note: (\etocrelease{1.08i} |2016/09/29|) the code has to handle both local
% and total toc.  Hence the flag \csbc{ifEtoc@notactive} has to be set prior
% to it. For a global toc, the \csbc{Etoc@tocid} was set to |\z@|, and the
% |\ifnum| in \csbc{etoc@startlocaltoc} did always fail, but I now prefer to
% simply nullify the \csbc{etoc@startlocaltoc}. As its default fallback is
% |\@gobble| I simply test here for the \csbc{ifEtoc@localtoc} flag. The
% \csbc{Etoc@tocid} will be undefined for a global toc but it is not tested
% anymore.
%
% The initialization such as |\global\let\Etoc@level\Etoc@minf| is needed in
% case the |.toc| file contains an \csbc{etoc@startlocaltoc} before any
% \csa{contentsline}.
%
% Local list of figures and tables set especially the tocdepth and a hook is
% added here for emptiness check to work correctly with them.
%
% MEMO: Should I also execute \csbc{etoclocaltableofcontentshook}?
% Then I would need to set \csbc{etoclocallistoffigureshook} to redefine it,
% rather than be inserted as itself. 
%    \begin{macrocode}
\def\Etoc@checkifempty {%
    \global\Etoc@isemptytoctrue
    \global\Etoc@stoptocfalse
    \global\let\Etoc@level\Etoc@minf
    \global\let\Etoc@virtualtop\Etoc@minf
    \gdef\Etoc@stackofends{{-3}{}}%
    \begingroup
      \ifEtoc@localtoc
        \def\etoc@startlocaltoc##1{%
          \ifnum##1=\Etoc@tocid\relax
              \global\let\etoclocaltop\Etoc@virtualtop
              \Etoc@@startlocaltochook
              \global\Etoc@notactivefalse
          \fi
        }%
%    \end{macrocode}
% The mechanism is to check if any \csa{contentsline} triggers execution.
% For this we replace the \etoc replacement by another replacement.
%    \begin{macrocode}
        \let\contentsline\Etoc@testingcontentslinelocal
      \else
        \let\contentsline\Etoc@testingcontentsline
      \fi
      \Etoc@storetocdepth
%    \end{macrocode}
% This here is a \etocrelease{1.09i} added work-around to avoid usage of
% \csbc{etocsetlocaltop.toc} which could cause the test of emptiness of a
% global TOC to actually execute some start and finish parts in some cases.
%    \begin{macrocode}
        \let\Etoc@setlocaltop@doendsandbegin\@empty
        \the\Etoc@toctoks
      \Etoc@restoretocdepth
    \endgroup
}
\DeclareRobustCommand*\etocifwasempty
  {\ifEtoc@isemptytoc\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi }
\expandafter\let\expandafter\etocxifwasempty\csname etocifwasempty \endcsname
\def\Etoc@testingcontentslinelocal #1{%
  \ifEtoc@stoptoc
  \else
   \ifnum\csname Etoc@#1@@\endcsname=\Etoc@@six@@
   \else
    \global\expandafter\let\expandafter\Etoc@level\csname Etoc@#1@@\endcsname
    \if @\@car#1\@nil\else\global\let\Etoc@virtualtop\Etoc@level\fi
    \ifEtoc@notactive
    \else
%    \end{macrocode}
% \csbc{ifEtoc@notactive} is \csa{iffalse} in case of a local TOC once it has
% encountered the \csbc{etoc@startlocaltoc} with matching id.  So here
% \csbc{etoclocaltop} has been set by \csbc{Etoc@@startlocaltoc} and we
% compare to the new level encountered.  If the latter is at most equal to
% \csbc{etoclocaltop} this means the local TOC ends there and is empty, so we
% set the \csbc{ifEtoc@stoptoc} to true, which will cause the subsequent
% parsing to abort immediately.  If it is greater we check how it compares to
% the local required toc depth.  If lower or equal we conclude the toc is not
% empty, and toggle the flag to stop the parsing; if greater, we are still in
% doubt and must continue.
%    \begin{macrocode}
     \ifnum\Etoc@level>\etoclocaltop
      \unless\ifnum\Etoc@level>\c@tocdepth
       \global\Etoc@isemptytocfalse
       \global\Etoc@stoptoctrue
      \fi
     \else
      \global\Etoc@stoptoctrue
     \fi
    \fi
   \fi
  \fi
%    \end{macrocode}
% The \csa{@gobblethree} was added to the \LaTeX{} kernel for its 2020-02-02
% PL 5 release and we require 2020-10-01 since \etocrelease{1.1a}.
%    \begin{macrocode}
  \@gobblethree
}
%    \end{macrocode}
% Test of emptiness of the global TOC (according to current setting of the
% levels and a possibly evolving tocdepth).
%    \begin{macrocode}
\def\Etoc@testingcontentsline #1{%
  \ifEtoc@stoptoc
  \else
   \ifnum\csname Etoc@#1@@\endcsname=\Etoc@@six@@
   \else
    \unless\ifnum\csname Etoc@#1@@\endcsname>\c@tocdepth
     \global\Etoc@isemptytocfalse
     \global\Etoc@stoptoctrue
    \fi
   \fi
  \fi
  \@gobblethree
}
%    \end{macrocode}
% |2015/03/16|: \etocrelease{1.08e} lets \csbc{localtableofcontents} do a
% first scan of the |.toc| file (as stored in \csbc{Etoc@toctoks}) to
% determine if the table of contents will in fact end up empty.
%
% Update (|2023/02/26|): the actual \etocrelease{1.08e} of |2015/04/17| had
% \csbc{etocchecksemptiness} to tell \etoc to do the emptiness check, it is
% not done automatically.
% 
% In that case, nothing is typeset. The
% command \csbc{etocaftertochook} is still executed though. Other ways were
% envisioned (like delimited macros) to determine this potential emptiness, but
% in the end I opted for execution of the |.toc| file with suitable definitions
% for \csa{contentsline} and \csbc{etoc@startlocaltoc}. Notice though that if
% emptiness would result from empty line styles, this can not be detected.
% Emptiness means ``no executed \csa{contentsline}''.
%
% For this detection of emptiness, assignments (here and in
% \csbc{Etoc@testingcontentsline}) are made globally, I think this is the best
% (just in case some portions of the |.toc| file turn out to be inside some
% groups --- perhaps for some silly color assignments, etc... --- whose
% boundaries do not necessarily respect unit levels).
%
% The flag \csbc{ifEtoc@tocwithid} discriminates between a \localtoc and a
% \toc|\ref{foo}|; the latter could so far possibly refer to a local or also to
% a global table of contents but release \etocrelease{1.08e} has deprecated the latter use
% as it complicated the code, for something truly silly. Thus |\ref{foo}| must
% now be with |foo| a label of a local TOC. As a result \csbc{ifEtoc@tocwithid} is
% less used now.
%
% In the case of a |\ref|ed-to toc whose label was just added hence is not yet
% in the |.aux| file, \csbc{Etoc@tocid} is |0|. \etoc used to issue a warning to
% run latex again and did no printing at all. Release \etocrelease{1.08e} in such cases
% prints the heading (this may gain one compilation step). Emptiness test is
% not executed as it would necessarily turn out positive and can not be
% trusted anyhow. The TOC is declared non empty, which it probably is...
%
% Emptiness detection for local tables of contents (either from a
% \csbc{localtableofcontents} or from a \csbc{tableofcontents}|\ref{localtoc}|)
% can be trusted only when the |.toc| file has stabilized.The emptiness status
% of a local TOC whose Id is not yet in the |.toc| is by necessity undecided
% yet (and not to be trusted really as the numbering may have changed; only
% when compilation runs settle is the emptiness status to be trusted). The
% code declares the TOC non empty, as it will be in 95\% of use cases.
%
% Dropping support for \toc|\ref{globaltoc}| means here that when a TOC id is
% not found in the |.toc| file we can assume it definitely has to be a local
% TOC needing more compilations. The emptiness status is undecided, the code
% declares the TOC non empty.
%
% \etocrelease{1.08i} |2016/09/29| now does \csa{Etoc@localtoctrue} right at the start (the
% earlier code could have to handle table of contents which were actually
% global, via the |\label/\ref| mechanism.) It does not rely on the |\ifnum|
% automatically false in \csbc{Etoc@@startlocaltoc} due to the special values |0|
% or |\z@| for \csbc{Etoc@tocid}, but simply leaves \csbc{etoc@startlocaltoc} to its
% default |\@gobble|. The \csa{Etoc@isemptytocfalse} is upfront in case some
% code using \csbc{etocifwasempty} is in user hooks. The default is to assume the
% TOC non-empty as its contents are actually still unknown. Under the
% \csa{Etoc@stoptoctrue} flag, the \csbc{Etoc@etoccontentsline} is more efficient now.
%
% The \csbc{ifEtoc@notactive} flag needs to be set before calling
% \csbc{Etoc@checkifempty}.
%
% I hesitated with \etocrelease{1.08i} to write something to aux file in order to let
% \LaTeX\ prompt the user for extra pass, after insertion of some new
% \csa{localtableofcontents}, but finally I prefer to only trick \LaTeX\ into
% telling about undefined references.
%
% The \csa{PackageWarning} approach has the advantage
% that at least in Emacs/AUCTeX the |C-cC-c| will propose |LaTeX|, not |View|.
% But perhaps some automated scripts checking |aux| file will not like the
% extra line which is then removed in next pass, and could possibly do one
% extra unneeded compilation to check |aux| file remains identical. Hence the
% second approach. (edit |2017/10/23|: good thing I documented that! I had
% completely forgotten that rationale, but I wonder if it is correct.)
%
% Also the \csa{PackageWarning} does not trigger a visible message
% near the end of the log file or console output, contrarily to a
% \centeredline{|LaTeX Warning: There were undefined references.|}
% followed by a 
% \centeredline{|LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.|}
%
% Method used here seems to work fine also with |latexmk|: it does not seem to
% induce it into making too many runs.
%    \begin{macrocode}
\def\Etoc@localtableofcontents#1{%
    \gdef\etoclocaltop{-\@m}%
    \Etoc@localtoctrue
    \global\Etoc@isemptytocfalse
    \edef\Etoc@tocid{#1}%
    \ifnum\Etoc@tocid<\@ne
      \setbox0\hbox{\ref{Unknown toc ref \@secondoftwo#1. \space Rerun LaTeX}}%
%    \end{macrocode}
% Do only heading, skip all the rest.
%    \begin{macrocode}
      \global\Etoc@stoptoctrue
      \gdef\etoclocaltop{-\thr@@}%
      \Etoc@tableofcontents
      \expandafter\Etoc@gobtoetoc@
    \fi
    \global\Etoc@notactivetrue
    \ifEtoc@checksemptiness
       \Etoc@checkifempty
    \fi
    \ifEtoc@isemptytoc
       \ifEtoc@notactive
         \setbox0\hbox{\ref{Unknown toc ID \number\Etoc@tocid. \space Rerun LaTeX}}%
%    \end{macrocode}
% Assume real one will be non-empty and print only heading for this pass.
%    \begin{macrocode}
         \global\Etoc@isemptytocfalse
         \global\Etoc@stoptoctrue
         \gdef\etoclocaltop{-\thr@@}%
         \Etoc@tableofcontents
         \expandafter\expandafter\expandafter\Etoc@gobtoetoc@
       \fi
    \else
       \global\Etoc@stoptocfalse
       \global\Etoc@notactivetrue
%    \end{macrocode}
% We can end up here either if the emptiness check was done and turned
% negative (then \csbc{etoclocaltop} has the correct level for usage in first
% argument of \csbc{etocsettocstyle}), or if the emptiness check was not done.
% For the latter case \csbc{etoclocaltop} has setting |-\@m|.
%    \begin{macrocode}
       \edef\etoc@startlocaltoc##1%
           {\noexpand\Etoc@@startlocaltoc{##1}{\Etoc@tocid}}%
       \Etoc@tableofcontents
    \fi
    \@gobble\etoc@
    \endgroup\ifEtoc@mustclosegroup\endgroup\fi
    \Etoc@tocdepthreset
    \Etoc@listofreset
    \etocaftertochook
}% \Etoc@localtableofcontents
%    \end{macrocode}
% |2013/03/07|: I discover a \csa{@namedef} trick to construct the
% \csbc{Etoc@again} space delimited macro:\\
% |    \@namedef {Etoc@again} {...stuff...}|\\
%  Original version was (copied from analogous stuff in |source2e|):\\
% |    {\def\1{\Etoc@again}\expandafter\gdef\1 {...stuff...}}|\\
% and in the end (now that I think about it) I simply use \csa{@firstofone}.
%
% \etocrelease{1.2} has a removed a \csa{Etoc@getrefno} as the author now
% knows about \csa{@car} so need to define a similar utility here!
%
% Much more importantly (and embarrassingly) \etocrelease{1.2} fixes a bug
% which had been here for ever. The code in its innocence 2012 birth year
% assumed that the first entry of \csa{r@foo}, if the latter is defined, is
% always numerical! But this is broken by \ctanpkg{varioref} if one used for
% example \csa{vpageref}|{foo}| before!  The first brace pair will then be
% |{??}|... causing in \etoc a ``Missing number'' error.
%
% About the current fixed code, there is no strong reason that
% \csbc{Etoc@getref} should work expandably.  Later
% \csbc{Etoc@localtableofcontents} does
% \centeredline{|\edef\Etoc@tocid{#1}\iffnum\Etoc@tocid<\@ne|} but I certainly
% could organize things differently.
%
% Maybe I should investigate more on what nasty things car be in
% first argument.  Or submit it to an \csa{expanded}?
%    \begin{macrocode}
\def\Etoc@getref #1{%
    \@ifundefined{r@#1}
         {0}
         {\expandafter\Etoc@getref@i\romannumeral-`0%
          \expandafter\expandafter\expandafter
          \@car\csname r@#1\endcsname0\@nil\@etoc
         }%
}
\def\Etoc@getref@i#1#2\@etoc{\ifnum9<1\string#1 #1#2\else 0\fi}
\def\Etoc@ref#1{\Etoc@localtableofcontents{\Etoc@getref{#1}}}
\def\Etoc@label#1{\label{#1}\futurelet\Etoc@nexttoken\Etoc@t@bleofcontents}
\@firstofone{\def\Etoc@again} {\futurelet\Etoc@nexttoken\Etoc@t@bleofcontents}
%    \end{macrocode}
% |\ref{foo}| expects |foo| to be a label to a \emph{local} TOC.
%
% The syntax \csbc{localtableofcontents}|\ref{foo}| is supported.
%    \begin{macrocode}
\def\Etoc@dothis #1#2\etoc@ {\fi #1}
\def\Etoc@t@bleofcontents{%
    \gdef\etoclocaltop{-\@M}%
    \ifx\Etoc@nexttoken\label\Etoc@dothis{\expandafter\Etoc@label\@gobble}\fi
    \ifx\Etoc@nexttoken\@sptoken\Etoc@dothis{\Etoc@again}\fi
%    \end{macrocode}
% \csbc{Etoc@ref} will hand over directly to \csbc{Etoc@localtableofcontents}.
% Argument will be (or rather expand to) zero if the reference is non-existent
% yet.
%    \begin{macrocode}
    \ifx\Etoc@nexttoken\ref\Etoc@dothis{\expandafter\Etoc@ref\@gobble}\fi
%    \end{macrocode}
% Flag to check if we were called from a \csbc{localtableofcontents}.
%    \begin{macrocode}
    \ifEtoc@tocwithid\Etoc@dothis{\Etoc@localtableofcontents{\c@etoc@tocid}}\fi
%    \end{macrocode}
% From now on we are handling a global TOC. Earlier, I used the trick of
% setting \csbc{Etoc@tocid} to |\z@| for compatibility with expansion of
% \csbc{etoc@startlocaltoc}. But since \etocrelease{1.08i} \csbc{etoc@startlocaltoc} is left to be
% |\@gobble|, and \csbc{Etoc@tocid} is never tested. We don't need to set the
% \csbc{ifEtoc@notactive} flag as now \csbc{Etoc@testingcontentsline} tests first the
% \csbc{ifEtoc@localtoc} flag (was already the case of \csbc{Etoc@etoccontentsline}). I change
% a bit the style of conditionals here for clarity of code.
%    \begin{macrocode}
    \global\Etoc@isemptytocfalse
    \ifEtoc@checksemptiness\Etoc@checkifempty\fi
    \ifEtoc@isemptytoc
     \ifEtoc@notocifnotoc
      \expandafter\expandafter\expandafter\@gobble
     \fi
    \fi
    \Etoc@tableofcontents
    \endgroup
    \ifEtoc@mustclosegroup\endgroup\fi
    \Etoc@tocdepthreset
    \Etoc@listofreset
    \etocaftertochook
    \@gobble\etoc@
    }% \Etoc@t@bleofcontents
%    \end{macrocode}
% \etocrelease{1.08c} does not use |\arabic| in the \csa{addtocontents} since I have seen
% that in some circumstances (for some right to left languages with
% polyglossia or babel), one can not rely on |\arabic| having its default
% definition. As the number written here will be used later in an \csa{ifnum}, I
% should not have used it in the first place (done |2015/03/30|).
%    \begin{macrocode}
\def\Etoc@table@fcontents{%
    \refstepcounter{etoc@tocid}%
    \Etoc@tocwithidfalse
    \futurelet\Etoc@nexttoken\Etoc@t@bleofcontents
}
\def\Etoc@localtable@fcontents{%
    \refstepcounter{etoc@tocid}%
    \addtocontents{toc}{\string\etoc@startlocaltoc{\the\c@etoc@tocid}}%
    \Etoc@tocwithidtrue
    \futurelet\Etoc@nexttoken\Etoc@t@bleofcontents
}
%    \end{macrocode}
% Attention that there could be a |\ref| following, thus we don't yet know
% whether this is a local or global table of contents.
%
% The \csbc{Etoc@tocdepthset} is for \csbc{etocsetnexttocdepth} mechanism.
%    \begin{macrocode}
\def\etoctableofcontents{%
   \Etoc@openouttoc
   \Etoc@tocdepthset
   \begingroup
%    \end{macrocode}
% This group will be closed in \csbc{Etoc@t@bleofcontents} or
% \csbc{Etoc@localtableofcontents}.
%
% Prior to its release |1.4c|, \ctanpkg{tableof} added a group pair via \csa{tof@begin}
% and \csa{tof@finish}. It was removed at |1.4c|, so no need to do anything now
% here about silencing \csa{tof@begingroup} and \csa{tof@endgroup}: they are
% inserted only in the \ctanpkg{tableof} private copy of the |.toc| file which is
% used by its own table of contents typesetting command.
%
% \etocrelease{1.09b} uses a |\def| in non-starred variant for allowing tricks to
% recognize later on if we are in a starred or non-starred case, whatever the
% user definition of \csbc{etocaftertitlehook} may be.
%    \begin{macrocode}
      \@ifstar
      {\let\Etoc@aftertitlehook\@empty\Etoc@table@fcontents}
      {\def\Etoc@aftertitlehook{\etocaftertitlehook}\Etoc@table@fcontents}%
}% \etoctableofcontents
\def\etocifisstarred{\ifx\Etoc@aftertitlehook\@empty
                         \expandafter\@firstoftwo\else
                         \expandafter\@secondoftwo
                     \fi}
\let\etocoriginaltableofcontents\tableofcontents
\let\tableofcontents\etoctableofcontents
%    \end{macrocode}
% The \csbc{Etoc@listofhook} is configured by \csbc{locallistoffigures} and
% \csbc{locallistoftables}.  The latter two use hooks rather than
% |\begingroup...\endgroup| to manage local configuration, in part because
% they want to support the |\label/\ref| special \etoc mechanism, so need to
% issue \csbc{localtableofcontents} last for it to be able to pick up a
% following |\label| or |\ref|.
%    \begin{macrocode}
\let\Etoc@listofhook\@empty
\newcommand*\localtableofcontents{%
   \Etoc@openouttoc
   \Etoc@tocdepthset
%    \end{macrocode}
% This group closed in \csbc{Etoc@t@bleofcontents} or \csbc{Etoc@localtableofcontents}.
% Same comment relative to \ctanpkg{tableof}. No need to do anything here.
%    \begin{macrocode}
   \begingroup
      \Etoc@listofhook
      \@ifstar
      {\let\Etoc@aftertitlehook\@empty\Etoc@localtable@fcontents}
      {\def\Etoc@aftertitlehook{\etocaftertitlehook}\Etoc@localtable@fcontents}%
}% \localtableofcontents
%    \end{macrocode}
% \etocrelease{1.09} adds \localtocwrdp.  Note that changes to the tocdepth
% from inside the |.toc| file during duration of local toc will remain without
% effect as a substitute is used which gets a frozen non-dynamical value.
%
% It seems \etocrelease{1.09} actually forgot a change to
% \csbc{Etoc@etoccontentsline} and the previous sentence was false and
% described only what happened during the emptiness check which thus could
% give false positives or false negatives.  But if I had done the needed
% change in \csbc{Etoc@etoccontentsline} to keep the two in sync, even if
% |tocdepth| evolves from the |.toc| file, I would have created a divergence
% between local TOCs (not only the
% \csbc{localtableofcontentswithrelativedepth} ones) under
% \csbc{etocstandardlines} and those not with standard lines.
%
% Redoing the whole thing at \etocrelease{1.2}.  I needed to insert a suitable
% hook in \csbc{Etoc@@startlocaltoc} (and also in the version used by
% \csbc{Etoc@checkifempty}).  And I have now at my disposal
% \csbc{Etoc@listofreset} to reset it (it will be expanded after both the
% emptiness check and the typesetting are completed, and at same grouping
% level as the trigger command defined here).  I do not want to add tokens
% after \csbc{localtableofcontents} to not break the |\label/\ref| thing,
% which is one reason for this way of proceeding.
%    \begin{macrocode}
\newcommand*\localtableofcontentswithrelativedepth[1]{%
   \def\Etoc@@startlocaltochook{%
       \global\c@tocdepth\numexpr\etoclocaltop+#1\relax
   }%
   \def\Etoc@listofreset{\let\Etoc@@startlocaltochook\@empty
                         \let\Etoc@listofreset\@empty}%
   \localtableofcontents
}% \localtableofcontentswithrelativedepth
%    \end{macrocode}
% Prior to \etocrelease{1.2}, \csbc{Etoc@tableofcontents} was constructed
% by \csbc{etocsettocstyle} as one big macro where |#1| and |#2| had been
% inserted.  It now simply stores |#1| and |#2| each in a macro and
% \csbc{Etoc@tableofcontents} is defined once and for all.  Also the boolean
% \csbc{ifEtoc@etocstyle} is added which helps keeping the emulation of
% the document class only for the global document TOC but use a better choice
% for local tables of contents (especially those in deeper sub-levels),
% which is activated via \csbc{etocetoclocaltocstyle} (near end of code).
%
% \csbc{etocstoretocstyleinto} added at \etocrelease{1.2}.  Too lazy
% to check if |#1| pre-exists.  Well, rather, too annoying to do this check
% as one may want to redefine |#1| without further ado.
%    \begin{macrocode}
\newcommand\etocsettocstyle[2]{%
   \Etoc@etocstylefalse
   \Etoc@classstylefalse
   \def\Etoc@tableofcontents@user@before{#1}%
   \def\Etoc@tableofcontents@user@after {#2}%
}%
\def\etocstoretocstyleinto#1{%
%%    \@ifdefinable#1{%
      \edef#1{\noexpand\Etoc@etocstylefalse\noexpand\Etoc@classstylefalse
              \def\noexpand\Etoc@tableofcontents@user@before{%
                  \unexpanded\expandafter{\Etoc@tableofcontents@user@before}%
                }%
              \def\noexpand\Etoc@tableofcontents@user@after{%
                  \unexpanded\expandafter{\Etoc@tableofcontents@user@after}%
                }%
             }%
%%    }%
}%
%    \end{macrocode}
% The macro names added here at \etocrelease{1.2} are provisory.  Next
% release will probably do a complete renaming of various internals because
% this is currently a complete mess with some names differing only by an |@|
% versus a voyel, but not necessarily being at a deeper level of expansion the
% more |@|'s they have... the deepest one being this \csbc{Etoc@tableofcontents}...
%    \begin{macrocode}
\def\Etoc@tableofcontents {%
    \Etoc@tableofcontents@etoc@before
    \ifEtoc@localtoc\ifEtoc@etocstyle\expandafter\expandafter\expandafter\@gobble\fi\fi
    \Etoc@tableofcontents@user@before
    \Etoc@tableofcontents@contents
    \ifEtoc@localtoc\ifEtoc@etocstyle\expandafter\expandafter\expandafter\@gobble\fi\fi
    \Etoc@tableofcontents@user@after
    \Etoc@tableofcontents@etoc@after
    \@gobble\etoc@
}
\def\Etoc@tableofcontents@etoc@before{%
    \ifnum\c@tocdepth>\Etoc@minf
    \else
     \expandafter\Etoc@gobtoetoc@
    \fi
    \Etoc@par
    \Etoc@beforetitlehook
    \etocbeforetitlehook
    \Etoc@storetocdepth
    \let\Etoc@savedcontentsline\contentsline
    \let\contentsline\Etoc@etoccontentsline
    \ifEtoc@standardlines
    \else
%    \end{macrocode}
% \etocrelease{1.1a}'s \csbc{Etoc@lxyz} now fetches 3 not 2 arguments and the
% \csa{l@section} etc... are not |\let| to it anymore, as they used to be here
% formerly.
%
% For backwards compatibility the \csa{etocsavedchaptertocline}
% etc... are still defined but issue a warning since \etocrelease{1.1a}
% and an error since \etocrelease{1.2}.
%    \begin{macrocode}
        \def\Etoc@do##1{%
            \expandafter\def\csname etocsaved##1tocline\endcsname
             {\PackageError{etoc}{%
              \expandafter\string\csname etocsaved##1tocline\endcsname\space
              has been deprecated\MessageBreak
              at 1.1a and is removed at 1.2.\MessageBreak
              Use \expandafter\string\csname l@##1\endcsname\space directly.\MessageBreak
              Reported \on@line}%
                                {I will use \expandafter\string
              \csname l@##1\endcsname\space myself for this time.%
                               }%
              \csname l@##1\endcsname
            }%
        }%
        \Etoc@dolevels
    \fi
}%
%    \end{macrocode}
% \etocrelease{1.09} makes \csbc{etocsetnexttocdepth} usable in |#1| (but this
% is not 100\% compatible with the emptiness check).  It makes an
% \csbc{etoclocaltop} usable in |#1| if under checksemptiness regime.
%
% (|#1| above now means \csbc{Etoc@tableofcontents@user@before} since \etocrelease{1.2})
%    \begin{macrocode}
\def\Etoc@tableofcontents@contents{%
    \Etoc@tocdepthset
    \ifEtoc@parskip\parskip\z@skip\fi
    \Etoc@aftertitlehook
%    \end{macrocode}
% \etocrelease{1.09} has replaced former \csa{Etoc@localtop} (\emph{minus one}) by
% \csbc{etoclocaltop}. Under checksemptinesstrue regime its value is already
% known, but it will be obtained again from the toc file execution. As it is
% used only if TOC is active, resetting it here this way is decorative and
% could be removed.
%    \begin{macrocode}
    \gdef\etoclocaltop{-\thr@@}%
    \Etoc@toctoc
    \etocaftercontentshook
}%
\def\Etoc@tableofcontents@etoc@after{%
    \@nobreakfalse
    \Etoc@restoretocdepth
%    \end{macrocode}
% \csa{contentsline} was set to \csbc{Etoc@etoccontentsline} by a non-global |\let|,
% and it will recover its normal value from exiting a scope limiting group.
% But \ctanpkg{tableof} (since |1.4a|) under \csbc{etocglobaldefs} does a global
% redefinition of \csa{contentsline}.  Its \csa{tof@finish} then does a global
% restore of \csa{contentsline}, but it will be to the \etoc set
% value. \csa{tof@finish} is active only if either the table of contents was
% typeset using \csa{tableof}, \csa{tablenotof}, \csa{tableoftaggedcontents}, or
% \csa{nextocwithtags} was used.  If not active it is either undefined (no
% package \ctanpkg{tableof}) or |\@empty|. Prior to \ctanpkg{tableof} |1.4c|, the
% \csa{tof@finish} closed a group and could be undefined as well, but not if
% \csbc{etocglobaldefs}.
%
% If rather than |\@empty| the \csa{tof@finish} fall-back was |\relax| we could
% use here \csa{@ifundefined} to check in one go (matters of speaking because
% expansion of \csa{@ifundefined} is not in "one-go"). Maybe I should update
% \ctanpkg{tableof}, but for time being I will simply add an extra test. All this is
% probably lots of time on irrelevant issue.
%    \begin{macrocode}
    \ifx\Etoc@global\global
     \@ifundefined{tof@finish}
     {}
     {\ifx\tof@finish\@empty
      \else
       \global\let\contentsline\Etoc@savedcontentsline
      \fi
     }%
    \fi
}
%    \end{macrocode}
% Refactored at \etocrelease{1.2} to check if the style is actually known
% and its level is from |-1| (|-2| in memoir class) to |5| inclusive.
% If not raise a warning.
%    \begin{macrocode}
\def\etocsetstyle#1{\ifcsname Etoc@#1@@\endcsname
                      \expandafter\Etoc@setstyle@a
                    \else
                      \expandafter\Etoc@setstyle@error
                    \fi {#1}%
}
\def\Etoc@setstyle@error #1{%
    \PackageWarning{etoc}{`#1' is unknown to etoc. \space Did you\MessageBreak
                    forget some \string\etocsetlevel{#1}{<level>}?\MessageBreak
                    Reported}%
    \@gobblefour
}
\def\Etoc@setstyle@a #1{%
    \edef\Etoc@tmp{\the\numexpr\csname Etoc@#1@@\endcsname}%
    \if1\unless\ifnum\Etoc@tmp<\Etoc@@six@@ 0\fi\unless\ifnum\Etoc@tmp>\Etoc@minf 0\fi1%
      \Etoc@standardlinesfalse
      \expandafter\Etoc@setstyle@b\expandafter\Etoc@tmp
    \else
      \PackageWarning{etoc}{Sorry, but you can not set the style of `#1',\MessageBreak
                     as its level \Etoc@tmp\space is either \number\Etoc@minf\space
                     or 6.\MessageBreak
                     Consider using \string\etocsetlevel\space first, but note
                     that `all',\MessageBreak
                     `none', `figure' and `table' are forbidden there. \space
                     Check\MessageBreak
                     the documentation about how to proceed for customizing\MessageBreak
                     figure and table entries in \string\listoffigures/tables.\MessageBreak
                     Reported}%
      \expandafter\@gobblefour
    \fi
}
%    \end{macrocode}
% Prior to \etocrelease{1.2} the |#1| here was some alphabetical string
% such as |minusone|.  We now use digit tokens (and minus sign) in the macro
% names.  The ``begin'' macros formerly incorporated
% \csa{Etoc@global}\csa{Etoc@isfirsttrue}.  They are now located in
% \csbc{Etoc@traversestackofends}.
%
% \etocrelease{1.2} adds \csbc{etocstorelinestylesinto}.  And
% \csbc{etocstorethislinestyleinto}.  No error check on the level.
%    \begin{macrocode}
\long\def\Etoc@setstyle@b#1#2#3#4#5{%
     \expandafter\def\csname Etoc@begin@#1\endcsname    {#2}%
     \expandafter\def\csname Etoc@prefix@#1\endcsname   {#3}%
     \expandafter\def\csname Etoc@contents@#1\endcsname {#4}%
     \expandafter\def\csname Etoc@end@#1\endcsname      {#5}%
}
\def\Etoc@storelines@a#1{%
   \noexpand\Etoc@setstyle@b{#1}%
     {\expandafter\Etoc@expandonce\csname Etoc@begin@#1\endcsname}%
     {\expandafter\Etoc@expandonce\csname Etoc@prefix@#1\endcsname}%
     {\expandafter\Etoc@expandonce\csname Etoc@contents@#1\endcsname}%
     {\expandafter\Etoc@expandonce\csname Etoc@end@#1\endcsname}%
}
\def\Etoc@expandonce#1{\unexpanded\expandafter{#1}}
\def\etocstorelinestylesinto#1{%
    \edef#1{\Etoc@storelines@a{-2}\Etoc@storelines@a{-1}\Etoc@storelines@a{0}%
            \Etoc@storelines@a {1}\Etoc@storelines@a {2}\Etoc@storelines@a{3}%
            \Etoc@storelines@a {4}\Etoc@storelines@a {5}}%
}
\def\etocstorethislinestyleinto#1#2{%
    \edef#2{\expandafter\Etoc@storelines@a\expandafter{\number\etoclevel{#1}}}%
}%  
%    \end{macrocode}
% Customization macros of the package default line styles.
%    \begin{macrocode}
\def\etocfontminustwo {\normalfont \LARGE \bfseries}
\def\etocfontminusone {\normalfont \large \bfseries}
\def\etocfontzero     {\normalfont \large \bfseries}
\def\etocfontone      {\normalfont \normalsize \bfseries}
\def\etocfonttwo      {\normalfont \normalsize}
\def\etocfontthree    {\normalfont \footnotesize}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\def\etocsepminustwo  {4ex \@plus .5ex \@minus .5ex}
\def\etocsepminusone  {4ex \@plus .5ex \@minus .5ex}
\def\etocsepzero      {2.5ex \@plus .4ex \@minus .4ex}
\def\etocsepone       {1.5ex \@plus .3ex \@minus .3ex}
\def\etocseptwo       {.5ex \@plus .1ex \@minus .1ex}
\def\etocsepthree     {.25ex \@plus .05ex \@minus .05ex}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\def\etocbaselinespreadminustwo {1}
\def\etocbaselinespreadminusone {1}
\def\etocbaselinespreadzero     {1}
\def\etocbaselinespreadone      {1}
\def\etocbaselinespreadtwo      {1}
\def\etocbaselinespreadthree    {.9}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\def\etocminustwoleftmargin  {1.5em plus 0.5fil}
\def\etocminustworightmargin {1.5em plus -0.5fil}
\def\etocminusoneleftmargin  {1em}
\def\etocminusonerightmargin {1em}
\def\etoctoclineleaders
        {\hbox{\normalfont\normalsize\hb@xt@2ex {\hss.\hss}}}
\def\etocabbrevpagename {p.~}
%    \end{macrocode}
% Versions earlier than \etocrelease{1.08b} (and since \etocrelease{1.05} |2012/12/01|) defined
% \csbc{etocpartname} (for use by \etoc's own line styles) to expand to
% \csa{partname}. But this didn't make sense in the context for example of
% \ctanpkg{babel} and \ctanpkg{babel-french}, because \csa{frenchpartname} does things depending on
% the current value of the counter |part|. The code in recent \ctanpkg{babel-french} (but
% not yet |v2.5a| when \csbc{etocpartname} was introduced) constructs control
% sequences \csa{ordinali}, etc... If the part counter is zero, this gives
% \csa{ordinal}. Usually this is not defined, hence no error happens (as it is
% constructed via |\csname|), but under class \ctanpkg{memoir} the bug showed up. All
% this to explain that I found out about this long lasting problem only on
% |2015/03/14|. Probably a sign that \etoc's own line styles are rarely
% used...
%    \begin{macrocode}
\def\etocpartname       {Part}
\def\etocbookname       {Book}
%    \end{macrocode}
% The macro \csbc{etocdefaultlines} was initially called \csbc{etoctoclines}. Now
% \csbc{etoctoclines} just does \csa{Etoc@standardlinesfalse}.
%
% Version \etocrelease{1.09f} wraps \csbc{etocbookname}, respectively
% \csbc{etocpartname}, in the book, resp. part, line styles inside a
% (potential) hyperlink together with the number.
%    \begin{macrocode}
\def\etocdefaultlines{\Etoc@standardlinesfalse
%% `book':
\Etoc@setstyle@b
  {-2}%
  {\addpenalty\@M\etocskipfirstprefix}
  {\addpenalty\@secpenalty}
  {\begingroup
   \etocfontminustwo
   \addvspace{\etocsepminustwo}%
   \parindent \z@
   \leftskip  \etocminustwoleftmargin
   \rightskip \etocminustworightmargin
   \parfillskip \@flushglue
   \vbox{\etocifnumbered{\etoclink{\etocbookname\enspace\etocthenumber:\quad}}{}%
         \etocname
         \baselineskip\etocbaselinespreadminustwo\baselineskip
         \par}%
   \addpenalty\@M\addvspace{\etocsepminusone}%
   \endgroup}
  {}%
%% `part':
\Etoc@setstyle@b
  {-1}%
  {\addpenalty\@M\etocskipfirstprefix}
  {\addpenalty\@secpenalty}
  {\begingroup
   \etocfontminusone
   \addvspace{\etocsepminusone}%
   \parindent \z@
   \leftskip  \etocminusoneleftmargin
   \rightskip \etocminusonerightmargin
   \parfillskip \@flushglue
   \vbox{\etocifnumbered{\etoclink{\etocpartname\enspace\etocthenumber.\quad}}{}%
         \etocname
         \baselineskip\etocbaselinespreadminusone\baselineskip
         \par}%
   \addpenalty\@M\addvspace{\etocsepzero}%
   \endgroup}
  {}%
%% `chapter':
\Etoc@setstyle@b
  {0}%
  {\addpenalty\@M\etocskipfirstprefix}
  {\addpenalty\@itempenalty}
  {\begingroup
   \etocfontzero
   \addvspace{\etocsepzero}%
   \parindent \z@ \parfillskip \@flushglue
   \vbox{\etocifnumbered{\etocnumber.\enspace}{}\etocname
         \baselineskip\etocbaselinespreadzero\baselineskip
         \par}%
   \endgroup}
  {\addpenalty{-\@highpenalty}\addvspace{\etocsepminusone}}%
%% `section':
\Etoc@setstyle@b
  {1}%
  {\addpenalty\@M\etocskipfirstprefix}
  {\addpenalty\@itempenalty}
  {\begingroup
   \etocfontone
   \addvspace{\etocsepone}%
   \parindent \z@ \parfillskip \z@
   \setbox\z@\vbox{\parfillskip\@flushglue
                   \etocname\par
                   \setbox\tw@\lastbox
                   \global\setbox\@ne\hbox{\unhbox\tw@\ }}%
   \dimen\z@=\wd\@ne
   \setbox\z@=\etoctoclineleaders
   \advance\dimen\z@\wd\z@
   \etocifnumbered
     {\setbox\tw@\hbox{\etocnumber, \etocabbrevpagename\etocpage}}
     {\setbox\tw@\hbox{\etocabbrevpagename\etocpage}}%
   \advance\dimen\z@\wd\tw@
   \ifdim\dimen\z@ < \linewidth
       \vbox{\etocname~%
             \leaders\box\z@\hfil\box\tw@
             \baselineskip\etocbaselinespreadone\baselineskip
             \par}%
   \else
       \vbox{\etocname~%
             \leaders\copy\z@\hfil\break
             \hbox{}\leaders\box\z@\hfil\box\tw@
             \baselineskip\etocbaselinespreadone\baselineskip
             \par}%
   \fi
   \endgroup}
  {\addpenalty\@secpenalty\addvspace{\etocsepzero}}%
%% `subsection':
\Etoc@setstyle@b
  {2}%
  {\addpenalty\@medpenalty\etocskipfirstprefix}
  {\addpenalty\@itempenalty}
  {\begingroup
   \etocfonttwo
   \addvspace{\etocseptwo}%
   \parindent \z@ \parfillskip \z@
   \setbox\z@\vbox{\parfillskip\@flushglue
                   \etocname\par\setbox\tw@\lastbox
                   \global\setbox\@ne\hbox{\unhbox\tw@}}%
   \dimen\z@=\wd\@ne
   \setbox\z@=\etoctoclineleaders
   \advance\dimen\z@\wd\z@
   \etocifnumbered
     {\setbox\tw@\hbox{\etocnumber, \etocabbrevpagename\etocpage}}
     {\setbox\tw@\hbox{\etocabbrevpagename\etocpage}}%
   \advance\dimen\z@\wd\tw@
   \ifdim\dimen\z@ < \linewidth
       \vbox{\etocname~%
             \leaders\box\z@\hfil\box\tw@
             \baselineskip\etocbaselinespreadtwo\baselineskip
             \par}%
   \else
       \vbox{\etocname~%
             \leaders\copy\z@\hfil\break
             \hbox{}\leaders\box\z@\hfil\box\tw@
             \baselineskip\etocbaselinespreadtwo\baselineskip
             \par}%
   \fi
   \endgroup}
  {\addpenalty\@secpenalty\addvspace{\etocsepone}}%
%% `subsubsection':
\Etoc@setstyle@b
  {3}%
  {\addpenalty\@M
   \etocfontthree
   \vspace{\etocsepthree}%
   \noindent
   \etocskipfirstprefix}
  {\allowbreak\,--\,}
  {\etocname}
  {.\hfil
    \begingroup
     \baselineskip\etocbaselinespreadthree\baselineskip
     \par
    \endgroup
   \addpenalty{-\@highpenalty}}%
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\Etoc@setstyle@b{4}{}{}{}{}%
\Etoc@setstyle@b{5}{}{}{}{}%
}% end of \etocdefaultlines definition
%    \end{macrocode}
% The \csbc{etocinnertopsep} default value is too big as well as \csbc{etocbelowtocskip}
% and \csbc{etocabovetocskip}, I guess, but if I am remember correctly I chose them
% to mimick the standard TOC spacings in |article| class.
%    \begin{macrocode}
\def\etocabovetocskip{3.5ex \@plus 1ex \@minus .2ex}
\def\etocbelowtocskip{3.5ex \@plus 1ex \@minus .2ex}
\def\etoccolumnsep{2em}
\def\etocmulticolsep{0ex}
\def\etocmulticolpretolerance{-1}
\def\etocmulticoltolerance{200}
\def\etocdefaultnbcol{2}
\def\etocinnertopsep{2ex}
\newcommand\etocmulticolstyle[2][\etocdefaultnbcol]{%
\etocsettocstyle
   {\let\etocoldpar\par
    \addvspace{\etocabovetocskip}%
    \ifnum #1>\@ne
          \expandafter\@firstoftwo
    \else \expandafter\@secondoftwo
    \fi
    {\multicolpretolerance\etocmulticolpretolerance
    \multicoltolerance\etocmulticoltolerance
    \setlength{\columnsep}{\etoccolumnsep}%
    \setlength{\multicolsep}{\etocmulticolsep}%
    \begin{multicols}{#1}[#2\etocoldpar\addvspace{\etocinnertopsep}]}
    {#2\ifvmode\else\begingroup\interlinepenalty\@M\parskip\z@skip
                    \@@par\endgroup
       \fi
       \nobreak\addvspace{\etocinnertopsep}%
       \pretolerance\etocmulticolpretolerance
       \tolerance\etocmulticoltolerance}%
   }%
   {\ifnum #1>\@ne
          \expandafter\@firstofone
    \else \expandafter\@gobble
    \fi
    {\end{multicols}}%
    \addvspace{\etocbelowtocskip}}%
}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\def\etocinnerbottomsep{3.5ex}
\def\etocinnerleftsep{2em}
\def\etocinnerrightsep{2em}
\def\etoctoprule{\hrule}
\def\etocleftrule{\vrule}
\def\etocrightrule{\vrule}
\def\etocbottomrule{\hrule}
\def\etoctoprulecolorcmd{\relax}
\def\etocbottomrulecolorcmd{\relax}
\def\etocleftrulecolorcmd{\relax}
\def\etocrightrulecolorcmd{\relax}
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\etoc@ruledheading #1{%
   \hb@xt@\linewidth{\color@begingroup
          \hss #1\hss\hskip-\linewidth
          \etoctoprulecolorcmd\leaders\etoctoprule\hss
          \phantom{#1}%
          \leaders\etoctoprule\hss\color@endgroup}%
          \nointerlineskip\nobreak\vskip\etocinnertopsep}
\newcommand*\etocruledstyle[2][\etocdefaultnbcol]{%
\etocsettocstyle
   {\addvspace{\etocabovetocskip}%
    \ifnum #1>\@ne
          \expandafter\@firstoftwo
    \else \expandafter\@secondoftwo
    \fi
       {\multicolpretolerance\etocmulticolpretolerance
        \multicoltolerance\etocmulticoltolerance
        \setlength{\columnsep}{\etoccolumnsep}%
        \setlength{\multicolsep}{\etocmulticolsep}%
        \begin{multicols}{#1}[\etoc@ruledheading{#2}]}
       {\etoc@ruledheading{#2}%
         \pretolerance\etocmulticolpretolerance
         \tolerance\etocmulticoltolerance}}
   {\ifnum #1>\@ne\expandafter\@firstofone
         \else \expandafter\@gobble
    \fi
    {\end{multicols}}%
    \addvspace{\etocbelowtocskip}}}
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\etocframedmphook{\relax}
\long\def\etocbkgcolorcmd{\relax}
\long\def\Etoc@relax{\relax}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\newbox\etoc@framed@titlebox
\newbox\etoc@framed@contentsbox
\newcommand*\etocframedstyle[2][\etocdefaultnbcol]{%
\etocsettocstyle{%
    \addvspace{\etocabovetocskip}%
    \sbox\z@{#2}%
    \dimen\z@\dp\z@
    \ifdim\wd\z@<\linewidth \dp\z@\z@ \else \dimen\z@\z@ \fi
    \setbox\etoc@framed@titlebox=\hb@xt@\linewidth{\color@begingroup
        \hss
        \ifx\etocbkgcolorcmd\Etoc@relax
        \else
            \sbox\tw@{\color{white}%
            \vrule\@width\wd\z@\@height\ht\z@\@depth\dimen\z@}%
            \ifdim\wd\z@<\linewidth \dp\tw@\z@\fi
            \box\tw@
            \hskip-\wd\z@
        \fi
        \copy\z@
        \hss
        \hskip-\linewidth
        \etoctoprulecolorcmd\leaders\etoctoprule\hss
        \hskip\wd\z@
        \etoctoprulecolorcmd\leaders\etoctoprule\hss\color@endgroup}%
    \setbox\z@\hbox{\etocleftrule\etocrightrule}%
    \dimen\tw@\linewidth\advance\dimen\tw@-\wd\z@
        \advance\dimen\tw@-\etocinnerleftsep
        \advance\dimen\tw@-\etocinnerrightsep
    \setbox\etoc@framed@contentsbox=\vbox\bgroup
        \hsize\dimen\tw@
        \kern\dimen\z@
        \vskip\etocinnertopsep
        \hbox\bgroup
        \begin{minipage}{\hsize}%
        \etocframedmphook
    \ifnum #1>\@ne
          \expandafter\@firstoftwo
    \else \expandafter\@secondoftwo
    \fi
        {\multicolpretolerance\etocmulticolpretolerance
        \multicoltolerance\etocmulticoltolerance
        \setlength{\columnsep}{\etoccolumnsep}%
        \setlength{\multicolsep}{\etocmulticolsep}%
        \begin{multicols}{#1}}
        {\pretolerance\etocmulticolpretolerance
         \tolerance\etocmulticoltolerance}}
    {\ifnum #1>\@ne\expandafter\@firstofone
         \else \expandafter\@gobble
     \fi
      {\end{multicols}\unskip }%
    \end{minipage}%
    \egroup
    \vskip\etocinnerbottomsep
    \egroup
    \vbox{\hsize\linewidth
        \ifx\etocbkgcolorcmd\Etoc@relax
        \else
            \kern\ht\etoc@framed@titlebox
            \kern\dp\etoc@framed@titlebox
            \hb@xt@\linewidth{\color@begingroup
            \etocleftrulecolorcmd\etocleftrule
            \etocbkgcolorcmd
            \leaders\vrule
                   \@height\ht\etoc@framed@contentsbox
                   \@depth\dp\etoc@framed@contentsbox
            \hss
            \etocrightrulecolorcmd\etocrightrule
            \color@endgroup}\nointerlineskip
            \vskip-\dp\etoc@framed@contentsbox
            \vskip-\ht\etoc@framed@contentsbox
            \vskip-\dp\etoc@framed@titlebox
            \vskip-\ht\etoc@framed@titlebox
        \fi
    \box\etoc@framed@titlebox\nointerlineskip
    \hb@xt@\linewidth{\color@begingroup
    {\etocleftrulecolorcmd\etocleftrule}%
    \hss\box\etoc@framed@contentsbox\hss
    \etocrightrulecolorcmd\etocrightrule\color@endgroup}
    \nointerlineskip
    \vskip\ht\etoc@framed@contentsbox
    \vskip\dp\etoc@framed@contentsbox
    \hb@xt@\linewidth{\color@begingroup\etocbottomrulecolorcmd
          \leaders\etocbottomrule\hss\color@endgroup}}
    \addvspace{\etocbelowtocskip}}}
%    \end{macrocode}
% For time being I will not however add the versions for ``lists of'', as
% anyhow probably nobody apart myself ever uses these things.
%
% It is impossible to know what kind of division heading |#2| uses, so there
% is not much I can do here at \etocrelease{1.2} apart from providing a
% user interface for adding the suitable thing to the |.toc| file.  And I
% discover at time of writing (finishing the \etocrelease{1.2}
% documentation) that I already have \csbc{etoclocalheadtotoc}.  I only need to
% add \csbc{etocglobalheadtotoc}.
%    \begin{macrocode}
\newcommand\etoc@multicoltoc[2][\etocdefaultnbcol]{%
    \etocmulticolstyle[#1]{#2}%
    \tableofcontents}
\newcommand\etoc@multicoltoci[2][\etocdefaultnbcol]{%
    \etocmulticolstyle[#1]{#2}%
    \tableofcontents*}
\newcommand\etoc@local@multicoltoc[2][\etocdefaultnbcol]{%
    \etocmulticolstyle[#1]{#2}%
    \localtableofcontents}
\newcommand\etoc@local@multicoltoci[2][\etocdefaultnbcol]{%
    \etocmulticolstyle[#1]{#2}%
    \localtableofcontents*}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\newcommand*\etoc@ruledtoc[2][\etocdefaultnbcol]{%
    \etocruledstyle[#1]{#2}%
    \tableofcontents}
\newcommand*\etoc@ruledtoci[2][\etocdefaultnbcol]{%
    \etocruledstyle[#1]{#2}%
    \tableofcontents*}
\newcommand*\etoc@local@ruledtoc[2][\etocdefaultnbcol]{%
    \etocruledstyle[#1]{#2}%
    \localtableofcontents}
\newcommand*\etoc@local@ruledtoci[2][\etocdefaultnbcol]{%
    \etocruledstyle[#1]{#2}%
    \localtableofcontents*}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\newcommand*\etoc@framedtoc[2][\etocdefaultnbcol]{%
    \etocframedstyle[#1]{#2}%
    \tableofcontents}
\newcommand*\etoc@framedtoci[2][\etocdefaultnbcol]{%
    \etocframedstyle[#1]{#2}%
    \tableofcontents*}
\newcommand*\etoc@local@framedtoc[2][\etocdefaultnbcol]{%
    \etocframedstyle[#1]{#2}%
    \localtableofcontents}
\newcommand*\etoc@local@framedtoci[2][\etocdefaultnbcol]{%
    \etocframedstyle[#1]{#2}%
    \localtableofcontents*}
%    \end{macrocode}
% placeholder for comments
%    \begin{macrocode}
\def\etocmulticol{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@multicoltoci}
    {\etoc@multicoltoc}}
\def\etocruled{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@ruledtoci}
    {\etoc@ruledtoc}}
\def\etocframed{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@framedtoci}
    {\etoc@framedtoc}}
\def\etoclocalmulticol{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@local@multicoltoci}
    {\etoc@local@multicoltoc}}
\def\etoclocalruled{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@local@ruledtoci}
    {\etoc@local@ruledtoc}}
\def\etoclocalframed{\begingroup
    \Etoc@mustclosegrouptrue
    \@ifstar
    {\etoc@local@framedtoci}
    {\etoc@local@framedtoc}}
%    \end{macrocode}
% \etocrelease{1.2} makes local TOCs in compatibility display style use
% |\subsection*| rather than |\section*|.  This is not good for local TOCs to
% a |\part| but anyhow the default is via \csbc{etocetoclocaltocstyle} which
% will do the right thing and the change here is irrelevant.  More comments
% below about handling \ctanpkg{memoir} and \ctanpkg{KOMA-script}.
%
% The macros next will be modified if under |book| or \ctanpkg{memoir} class.
% The \ctanpkg{KOMA-script} case uses rather the |leveldown| mechanism.
% These local TOCs things are used only under \csbc{etocclasstocstyle}.
% With \csbc{etocetoclocaltocstyle}, they are not used.
%    \begin{macrocode}
\def\etocmemoirtoctotocfmt #1#2{%
    \PackageWarning{etoc}
        {\string\etocmemoirtoctotocfmt\space is deprecated.\MessageBreak
         Use in its place \string\etocsettoclineforclasstoc,\MessageBreak
         and \string\etocsettoclineforclasslistof{toc} (or {lof}, {lot}).
         I will do this now.\MessageBreak
         Reported}%
    \etocsettoclineforclasstoc{#1}{#2}%
    \etocsettoclineforclasslistof{toc}{#1}{#2}%
}
\def\etocsettoclineforclasstoc #1#2{%
    \def\etocclassmaintocaddtotoc{\etocglobalheadtotoc{#1}{#2}}%
}
\def\etocsettoclineforclasslistof #1#2#3{%
    \@namedef{etocclasslocal#1addtotoc}{\etoclocalheadtotoc{#2}{#3}}%
}
\let\etocclasslocaltocaddtotoc\@empty
\let\etocclasslocallofaddtotoc\@empty
\let\etocclasslocallotaddtotoc\@empty
\ifdefined\c@chapter
  \def\etocclasslocaltocmaketitle{\section*{\localcontentsname}}
  \def\etocclasslocallofmaketitle{\section*{\locallistfigurename}}
  \def\etocclasslocallotmaketitle{\section*{\locallisttablename}}
  \etocsettoclineforclasstoc        {chapter}{\contentsname}
  \etocsettoclineforclasslistof{toc}{section}{\localcontentsname}
  \etocsettoclineforclasslistof{lof}{section}{\locallistfigurename}
  \etocsettoclineforclasslistof{lot}{section}{\locallisttablename}
\else
  \def\etocclasslocaltocmaketitle{\subsection*{\localcontentsname}}%
  \def\etocclasslocallofmaketitle{\subsection*{\locallistfigurename}}%
  \def\etocclasslocallotmaketitle{\subsection*{\locallisttablename}}%
  \etocsettoclineforclasstoc        {section}{\contentsname}
  \etocsettoclineforclasslistof{toc}{subsection}{\localcontentsname}
  \etocsettoclineforclasslistof{lof}{subsection}{\locallistfigurename}
  \etocsettoclineforclasslistof{lot}{subsection}{\locallisttablename}
\fi
%    \end{macrocode}
% This is moved to a macro to localize complications with conditionals.
%    \begin{macrocode}
\def\etocclasslocalperhapsaddtotoc #1{%
    \etocifisstarred
      {}
      {\csname ifEtoc@local#1totoc\endcsname
         \csname etocclasslocal#1addtotoc\endcsname
       \fi
      }%
}
%    \end{macrocode}
% No need for a \csa{phantomsection} if the \csa{addcontentsline} is after
% |\section*|.  For the standard classes, I make no effort to adjust level
% used for the local heading if it is local to a \csa{part}, not a
% \csa{section}.  Anyhow this code will not be used by default for
% local TOCs due to \csbc{etocetoclocaltocstyle}.
%    \begin{macrocode}
\def\etocarticlestyle{%
    \etocsettocstyle
    {\ifEtoc@localtoc
       \@nameuse{etocclasslocal\Etoc@currext maketitle}%
       \etocclasslocalperhapsaddtotoc\Etoc@currext
     \else
       \section *{\contentsname
                  \@mkboth {\MakeUppercase \contentsname}
                           {\MakeUppercase \contentsname}}%
       \etocifisstarred{}{\etocifmaintoctotoc{\etocclassmaintocaddtotoc}{}}%
     \fi
    }
    {}%
}
\def\etocarticlestylenomarks{%
    \etocsettocstyle
    {\ifEtoc@localtoc
       \@nameuse{etocclasslocal\Etoc@currext maketitle}%
       \etocclasslocalperhapsaddtotoc\Etoc@currext
     \else
       \section *{\contentsname}%
       \etocifisstarred{}{\etocifmaintoctotoc{\etocclassmaintocaddtotoc}{}}%
     \fi
    }
    {}%
}
%    \end{macrocode}
% Make definitions with |book| in the macro names or redefine them
% for |book|? Chose the latter.
%    \begin{macrocode}
\def\etocbookstyle{%
    \etocsettocstyle
    {\if@twocolumn \@restonecoltrue \onecolumn \else \@restonecolfalse \fi
     \ifEtoc@localtoc
       \@nameuse{etocclasslocal\Etoc@currext maketitle}%
       \etocclasslocalperhapsaddtotoc\Etoc@currext
     \else
       \chapter *{\contentsname
                  \@mkboth {\MakeUppercase \contentsname}
                           {\MakeUppercase \contentsname}}%
       \etocifisstarred{}{\etocifmaintoctotoc{\etocclassmaintocaddtotoc}{}}%
     \fi
    }%
    {\if@restonecol \twocolumn \fi}%
}
\def\etocbookstylenomarks{%
    \etocsettocstyle
    {\if@twocolumn \@restonecoltrue \onecolumn \else \@restonecolfalse \fi
     \ifEtoc@localtoc
       \@nameuse{etocclasslocal\Etoc@currext maketitle}%
       \etocclasslocalperhapsaddtotoc\Etoc@currext
     \else
       \chapter *{\contentsname}%
       \etocifisstarred{}{\etocifmaintoctotoc{\etocclassmaintocaddtotoc}{}}%
     \fi
    }%
    {\if@restonecol \twocolumn \fi}%
}
\let\etocreportstyle\etocbookstyle
\let\etocreportstylenomarks\etocbookstylenomarks
%    \end{macrocode}
% |v3.7i| of memoir has moved the \csa{phantomsection} to a better location,
% before typesetting the title and we follow suit at \etocrelease{1.09a}, and
% at \etocrelease{1.09b}.  Formerly \etoc used \csbc{etocaftertitlehook} to
% mimick the memoir code but as its name indicate, it is supposedly executed
% after the title... and this also had the defect of making
% \csbc{etocaftertitlehook} not anymore a user command.  Thus we here use some
% refactoring of the \csbc{Etoc@aftertitlehook} internal mechanism to help
% recognize if we are in the starred case or not.
%
% \csa{phantomsection} is always defined by memoir, empty if hyperref absent.
%
% Updates at \etocrelease{1.2} for the standard display style inherited
% from the class to actually be usable with local table of contents.
% Unfortunately the printing of the title rigidly hard-codes a
% |\thispagestyle{chapter}|:
% \begin{verbatim}
% \@lofmaketitle ->\@nameuse {lofheadstart} {\parindent \z@ \parskip \z@ \interli
% nepenalty \@M \@nameuse {printlofnonum}\@nameuse {printloftitle}{\listfigurenam
% e }\@nameuse {lofmark}\thispagestyle {chapter}\@nameuse {afterloftitle} } \@aft
% erheading
% \end{verbatim}
% \vskip-\baselineskip
% Oh well I discover there is a \csa{chapterheadstart} but not
% \csa{sectionheadstart}...
%
% Actually now \etoc will by default not use the class inherited style for the
% local TOC titles, so maybe I should have not wasted time on this.  From the
% \csbc{etocsettocstyle} arguments one can know if this is for a local TOC,
% but one can not know the level, which is inferred from the actual execution
% of the TOC data.  There is a problem though that the \ctanpkg{memoir}
% default would be usable for a local TOC in a |\part|.  Although one can
% argue if it makes sense to display a TOC as prominently as a chapter anyway.
% Again, the default with \etoc will anyhow not use this as
% \csbc{etocetoclocaltocstyle} deactivates the \csbc{etocsettocstyle} for
% local TOCs.
%
% MEMO: would it make sense to have an \csa{etocsetlocaltocstyle}?  As
% explained above this would however induced dramatic internal \etoc changes as one
% would have to wait for title insertion until the time one knows the local
% level.  Which is exactly what \csbc{etocetoclocaltocstyle}  via the
% \csbc{ifEtoc@etocstyle} does.
%
% Update at \etocrelease{1.2} to account for \csbc{locallistoffigures} and
% \csbc{locallistoftables}.
%    \begin{macrocode}
\def\etocmemoirstyle{%
    \etocsettocstyle
        {\ensureonecol \par \begingroup \phantomsection
         \ifx\Etoc@aftertitlehook\@empty
         \else
%    \end{macrocode}
% This branch executed for the non-starred variant
%    \begin{macrocode}
           \ifmem@em@starred@listof
           \else
%    \end{macrocode}
% Global case is only for \csa{tableofcontents} as \etoc does not hack into
% \csa{listofpictures} and \csa{listoftables}.
%
% Local case will not be executed in default configurations (cf
% \csbc{etocetoclocaltocstyle}).
%
% \csbc{etocclasslocalperhapsaddtotoc} is to avoid worries with conditionals.
%    \begin{macrocode}
             \ifEtoc@localtoc
                  \etocclasslocalperhapsaddtotoc\Etoc@currext
             \else
               \ifEtoc@maintoctotoc
                  \etocclassmaintocaddtotoc
               \fi
             \fi
           \fi
         \fi
         \ifEtoc@localtoc
         % trying to mimick a section title but there is no \sectionheadstart
         % there is no \printsectiontitle etc... Oh well I will be more
         % radical then
            \@namedef{@\Etoc@currext maketitle}{%
               \@nameuse{etocclasslocal\Etoc@currext maketitle}%
            }%
         \fi
         \@nameuse {@\Etoc@currext maketitle} %<< space token here from memoir code
         \ifx\Etoc@aftertitlehook\@empty
          \else
%    \end{macrocode}
% Execute etoc hook before the \csa{cfttocbeforelisthook} and keep distinction
% between starred and non-starred contexts for other hooks (by testing if
% \csbc{Etoc@aftertitlehook} is empty or not). Notice that the memoir class
% way of implementing \csbc{tableofcontents} leaves no way for code executed
% by the TOC code to know if it is executed in starred or non-starred context.
%    \begin{macrocode}         
          \Etoc@aftertitlehook \let \Etoc@aftertitlehook \relax
         \fi
         \parskip \cftparskip \@nameuse {cft\Etoc@currext beforelisthook}%
        }%
        {\@nameuse {cft\Etoc@currext afterlisthook}%
         \endgroup\restorefromonecol
        }%
}
%    \end{macrocode}
% Compatibility layer for the \ctanpkg{KOMA-script} classes:
%
% \etocrelease{1.09c} (|2020/05/15|) did an update as \ctanpkg{KOMA-script}
% deprecated \csa{iftocfeature}.  Thanks to Bilel Omrani for report.  I
% did not check if cloning of KOMA code required some further updates.
% \etocrelease{1.09f} added more updates.
%
% At \etocrelease{1.2} this is further updated to be usable also for list
% of figures and tables.  However, this update is somewhat theoretical because
% \etoc does not interfere at all with \csa{listoffigures} and
% \csa{listoftables}: the update is useful only to make \etoc's
% \csbc{locallistoffigures} and \csbc{locallistoftables} usable in display
% style compatibility mode.
%
% But during development on this I became aware that \ctanpkg{KOMA-script}
% since its |3.30| release has the feature that an unnumbered section resets
% the counters of subsections.  This creates a problem (whose description I
% have moved to the user manual) which can be alleviated for local TOCs at the
% highest level below global one by using KOMA's |\setuptoc{toc}{leveldown}|.
% So I decided to do this systematically, as in the code next via a new
% private hook, but the problem will remain for local TOCs at lower levels,
% and there does not seem to be any way to tell KOMA to use say
% |\subsubsection*|, barring, from what I understand from the manual, usage of
% its \csa{deftocheading}.  So in a second stage I decided that per default
% \etoc would rather use for local TOCs, and not only for KOMA classes but all
% classes, an adaptive heading fitted to the ``local top''.  As this ``local
% top'' can only be determined from inside the expansion of \csbc{Etoc@toctoc}
% which contains the |.toc| file data, the boolean \csbc{ifEtoc@etocstyle}
% was added which will make \csbc{etocsettocstyle} configuration ignored.  In
% this way, with \csbc{etocetoclocaltocstyle}, the document class emulation
% will apply to the global TOC whereas local TOCs will use the adaptive
% scheme.  To avoid duplication other relevant info is moved to the user
% manual.
%
% We put the trigger of |leveldown| for KOMA classes in
% \csbc{Etoc@beforetitlehook}.  So there will be no test with
% \csbc{ifEtoc@localtoc} here contrarily to the case of standard classes
% and memoir.  Again, all of this normally is not relevant as by default \etoc
% \etocrelease{1.2} will use its \csbc{etocetoclocaltocstyle} which
% for local TOCs ignores the emulation code of the main TOC.
%    \begin{macrocode}
\let\Etoc@beforetitlehook\@empty
\if1\@ifclassloaded{scrartcl}0{\@ifclassloaded{scrbook}0{\@ifclassloaded{scrreprt}01}}%
\expandafter\@gobble
\else
%    \end{macrocode}
% Surely paranoid here but I don't have time to go through KOMA documentation
% (I am not really familiar with these classes).
%
% MEMO: I do not know if \ctanpkg{KOMA-script}'s \csa{setuptoc} sets options
% locally or globally.  If globally the code below must be modifed to unset
% the |totoc| option depending on at time of use status of the \etoc own
% |totoc| options.
%    \begin{macrocode}
   \ifdefined\setuptoc
     \def\Etoc@beforetitlehook{%
         \ifEtoc@localtoc
            \etocclasslocalperhapsaddtotoc\Etoc@currext
            \setuptoc{\Etoc@currext}{leveldown}%
         \else
            \etocifisstarred{}{\etocifmaintoctotoc{\setuptoc{toc}{totoc}}}%
         \fi
     }%
   \fi
\expandafter\@firstofone
\fi
{\def\etocclasslocalperhapsaddtotoc #1{%
    \etocifisstarred
    {}%
    {\csname ifEtoc@local#1totoc\endcsname
      \setuptoc{\Etoc@currext}{totoc}%
     \fi
    }% 
  }%
}
\ifdefined\Iftocfeature
  \def\etoc@Iftocfeature{\Iftocfeature}%
\else
  \def\etoc@Iftocfeature{\iftocfeature}%
\fi
%    \end{macrocode}
% Peut-être en fait je devrais toujours faire |\let\if@dynlist\if@tocleft|?
% Mais je ne l'ai pas vu dans le code de KOMA pour les LOF et LOT (globales,
% évidemment).  Mais cela m'obligerait à lire vraiment le code source de KOMA.
% Pas le temps.
%    \begin{macrocode}
\def\etocscrartclstyle{%
    \etocsettocstyle
        {\ifx\Etoc@currext\Etoc@tocext
             \expandafter\@firstofone
         \else
             \expandafter\@gobble
         \fi
         {\let\if@dynlist\if@tocleft}%
         \edef\@currext{\Etoc@currext}%
         \@ifundefined{listof\@currext name}%
            {\def\list@fname{\listofname~\@currext}}%
            {\expandafter\let\expandafter\list@fname
                         \csname listof\@currext name\endcsname}%
         \etoc@Iftocfeature {\@currext}{onecolumn}
             {\etoc@Iftocfeature {\@currext}{leveldown}
              {}
              {\if@twocolumn \aftergroup \twocolumn \onecolumn \fi }}
             {}%
         \etoc@Iftocfeature {\@currext}{numberline}%
                            {\def \nonumberline {\numberline {}}}{}%
         \expandafter\tocbasic@listhead\expandafter {\list@fname}%
         \begingroup \expandafter \expandafter \expandafter
         \endgroup \expandafter
         \ifx
             \csname microtypesetup\endcsname \relax
         \else
             \etoc@Iftocfeature {\@currext}{noprotrusion}{}
                 {\microtypesetup {protrusion=false}%
                  \PackageInfo {tocbasic}%
                  {character protrusion at \@currext\space deactivated}}%
         \fi
         \etoc@Iftocfeature{\@currext}{noparskipfake}{}{%
               \ifvmode \@tempskipa\lastskip \vskip-\lastskip
               \addtolength{\@tempskipa}{\parskip}\vskip\@tempskipa\fi
               }%
         \setlength {\parskip }{\z@ }%
         \setlength {\parindent }{\z@ }%
         \setlength {\parfillskip }{\z@ \@plus 1fil}%
         \csname tocbasic@@before@hook\endcsname
         \csname tb@\@currext @before@hook\endcsname
      }% end of before_toc
      {% start of after_toc
%    \end{macrocode}
% (This next discussion has not been revised at \etocrelease{1.2} so let's
% hope it is fine).
%
% At \etocrelease{1.09f} I considered adding this \csa{BeforeClosingMainAux} hunk
% to the second argument of \csbc{etocsettocstyle}-emulation of \ctanpkg{KOMA-script}.
% But:
% \begin{itemize}
% \item there seems to be no interface to \csa{tocbasic@end@toc@file},
%
% \item
%   it defaults to issuing a \csa{par}, but we want etoc to still be able
%   to produce other TOCs, possibly inline, and they should not be
%   influenced by it and I don't want at this stage to add an interface
%   to enable/disable and have to document it,
%
% \item
%   the whole thing appears to me to be ill-conceived in so far as it
%   sort of implies the \csbc{tableofcontents} is used only once, as each
%   instance will again add this \csa{tocbasic@end@toc@file} to end of
%   toc file, which may thus end up being executed multiple times.
% \end{itemize}
% So rather than putting the thing in the |.toc| file, we will execute
% it here.  This way it will not impact other TOCs typeset via etoc
% design facilities in the document.
%    \begin{macrocode}
%          \BeforeClosingMainAux
%          {\addtocontents
%            {toc}{\string\providecommand\string\tocbasic@end@toc@file{}%
%                  \string\tocbasic@end@toc@file}%
%          }%
         \providecommand\tocbasic@end@toc@file{}\tocbasic@end@toc@file
         \edef\@currext{\Etoc@currext}%
         \csname tb@\@currext @after@hook\endcsname
         \csname tocbasic@@after@hook\endcsname
     }% end of after_toc
}
\let\etocscrbookstyle\etocscrartclstyle
\let\etocscrreprtstyle\etocscrartclstyle
%    \end{macrocode}
% The \csbc{etocclasstocstyle} will be redefined according to document
% class.  Then, later, it will be extended with an
% \csa{Etoc@classstyletrue}.
%    \begin{macrocode}
\def\etocclasstocstyle{\etocarticlestyle}
\newcommand*\etocmarkboth[1]{%
    \@mkboth{\MakeUppercase{#1}}{\MakeUppercase{#1}}}
\newcommand*\etocmarkbothnouc[1]{\@mkboth{#1}{#1}}
\newcommand\etoctocstyle[3][section]{\etocmulticolstyle[#2]%
    {\csname #1\endcsname *{#3}}}
\newcommand\etoctocstylewithmarks[4][section]{\etocmulticolstyle[#2]%
    {\csname #1\endcsname *{#3\etocmarkboth{#4}}}}
\newcommand\etoctocstylewithmarksnouc[4][section]{\etocmulticolstyle[#2]%
    {\csname #1\endcsname *{#3\etocmarkbothnouc{#4}}}}
\def\Etoc@redefetocstylesforchapters{%
    \renewcommand\etoctocstylewithmarks[4][chapter]{%
          \etocmulticolstyle[##2]{\csname ##1\endcsname *{##3\etocmarkboth{##4}}}%
    }
    \renewcommand\etoctocstylewithmarksnouc[4][chapter]{%
          \etocmulticolstyle[##2]{\csname ##1\endcsname *{##3\etocmarkbothnouc{##4}}}%
    }
    \renewcommand\etoctocstyle[3][chapter]{%
          \etocmulticolstyle[##2]{\csname ##1\endcsname *{##3}}
    }
}
\@ifclassloaded{scrartcl}
    {\renewcommand*\etocclasstocstyle{\etocscrartclstyle}}{}
\@ifclassloaded{book}
    {\renewcommand*\etocfontone{\normalfont\normalsize}
     \renewcommand*\etocclasstocstyle{\etocbookstyle}
     \Etoc@redefetocstylesforchapters}{}
\@ifclassloaded{report}
    {\renewcommand*\etocfontone{\normalfont\normalsize}
     \renewcommand*\etocclasstocstyle{\etocreportstyle}
     \Etoc@redefetocstylesforchapters}{}
\@ifclassloaded{scrbook}
    {\renewcommand*\etocfontone{\normalfont\normalsize}
     \renewcommand*\etocclasstocstyle{\etocscrbookstyle}
     \Etoc@redefetocstylesforchapters}{}
\@ifclassloaded{scrreprt}
    {\renewcommand*\etocfontone{\normalfont\normalsize}
     \renewcommand*\etocclasstocstyle{\etocscrreprtstyle}
     \Etoc@redefetocstylesforchapters}{}
\@ifclassloaded{memoir}
    {\renewcommand*\etocfontone{\normalfont\normalsize}
     \renewcommand*\etocclasstocstyle{\etocmemoirstyle}
     \Etoc@redefetocstylesforchapters}{}
\def\etoctocloftstyle {%
    \etocsettocstyle{%
      \@cfttocstart
      \par
      \begingroup
        \parindent\z@ \parskip\cftparskip
%    \end{macrocode}
% I don't feel like redefining \csa{@cftmaketoctitle} etc to apply ``level
% down''.  Up to the user to use the tocloft interface after the main TOC
% to do appropriate actions.  I consider emitting a warning, but then if
% the user has customize \csa{@cftmaketoctitle} or variant, how to know?
% (apart from numerous ifx tests).
%    \begin{macrocode}
        \@nameuse{@cftmake\Etoc@currext title}%
%    \end{macrocode}
% But for adding an appropriate entry to the toc file I can intervene silently.
% I can remove the test \csa{if@cfttocbibind} here as anyhow I have to test
% status of \etoc `to toc' options.
%    \begin{macrocode}
        \ifEtoc@localtoc
           \etoctocloftlocalperhapsaddtotoc\Etoc@currext
        \else
           \etocifisstarred {}{\ifEtoc@maintoctotoc\@cftdobibtoc\fi}%
        \fi
    }%
    {%
      \endgroup
      \@cfttocfinish 
    }%
}
\def\etoctocloftlocalperhapsaddtotoc#1{%
    \etocifisstarred
      {}%
      {\csname ifEtoc@local#1totoc\endcsname
        \ifdefined\c@chapter\def\@tocextra{@section}\else\def\@tocextra{@subsection}\fi
        \csname @cftdobib#1\endcsname
       \fi 
      }%
}
%    \end{macrocode}
% This is active only if \ctanpkg{tocbibind} boolean \csa{if@dotoctoc} is found
% true at begin document and there was no use of \csbc{etocsettocstyle} in the
% preamble.  The part on local TOC also applies to local LOF and LOT but is
% executed only if \csbc{etocclasstocstyle} was present in the preamble.  Under
% the default \csbc{etocetoclocaltocstyle}, only the global TOC is under
% influence of this (assuming thus that \ctanpkg{tocbibind} was loaded without
% its |nottoc| or |none| option).
%    \begin{macrocode}
\def\etoctocbibindstyle {%
    \etocsettocstyle {%
      \toc@start
      \ifEtoc@localtoc
          \@nameuse{etocclasslocal\Etoc@currext maketitle}%
          \etocclasslocalperhapsaddtotoc\Etoc@currext
      \else
          \etoc@tocbibind@dotoctitle
      \fi
      }%
    {\toc@finish}%
}
\def\etoc@tocbibind@dotoctitle {%
%    \end{macrocode}
% If \ctanpkg{tocbibind} is loaded but later between |\begin{document}| and
% \csa{tableofcontents} the user does \csbc{etocsetup}|{maintoctotoc=afalse}|
% we have to catch this.
%    \begin{macrocode}
       \if@bibchapter
        \etocifisstarred
          {\chapter*{\contentsname}\prw@mkboth{\contentsname} % id.
          }%
          {\ifEtoc@maintoctotoc
             \toc@chapter{\contentsname} %<-space from original
           \else
             \chapter*{\contentsname}\prw@mkboth{\contentsname} % id.
           \fi
           }%
       \else
        \etocifisstarred
          {\@nameuse{\@tocextra}*{\contentsname\prw@mkboth{\contentsname}} %<-space
          }
          {\ifEtoc@maintoctotoc
             \toc@section{\@tocextra}{\contentsname} %<-space from original
           \else
             \@nameuse{\@tocextra}*{\contentsname\prw@mkboth{\contentsname}} % id.
          \fi
          }%
       \fi
}%
\@ifclassloaded{memoir}
{}
{% memoir not loaded
 \@ifpackageloaded{tocloft}
    {\if@cftnctoc\else
                 \ifEtoc@keeporiginaltoc
                   \else
                   \let\tableofcontents\etoctableofcontents
                 \fi
     \fi }
    {\AtBeginDocument
      {\@ifpackageloaded{tocloft}
       {\if@cftnctoc\else
         \PackageWarningNoLine {etoc}
         {Package `tocloft' was loaded after `etoc'.\MessageBreak
          To prevent it from overwriting \protect\tableofcontents, it will\MessageBreak
          be tricked into believing to have been loaded with its\MessageBreak
          option `titles'. \space But this will cause the `tocloft'\MessageBreak
          customization of the titles of the main list of figures\MessageBreak
          and list of tables to not apply either.\MessageBreak
          You should load `tocloft' before `etoc'.}%
        \AtEndDocument{\PackageWarning{etoc}
                       {Please load `tocloft' before `etoc'!\@gobbletwo}}%
        \fi
        \@cftnctoctrue }%
       {}%
      }%
     }%
}
\@ifclassloaded{memoir}
{}
{% memoir not loaded
  \AtBeginDocument{%
  \@ifpackageloaded{tocloft}
   {%
     \def\etocclasstocstyle{%
       \etoctocloftstyle
       \Etoc@classstyletrue
     }%
     \ifEtoc@etocstyle
        \ifEtoc@classstyle
          \etocclasstocstyle
          \Etoc@etocstyletrue
        \fi
     \else
        \ifEtoc@classstyle
          \etocclasstocstyle
        \fi
     \fi
   }%
   {% no tocloft
    \@ifpackageloaded {tocbibind}
     {\if@dotoctoc
        \def\etocclasstocstyle{%
          \etoctocbibindstyle
          \Etoc@classstyletrue
         }%
        \ifEtoc@etocstyle
           \ifEtoc@classstyle
             \etocclasstocstyle
             \Etoc@etocstyletrue
           \fi
        \else
           \ifEtoc@classstyle
             \etocclasstocstyle
           \fi
        \fi
%    \end{macrocode}
% Not clear if I should interpret \csa{Etoc@keeporiginaltoctrue} in this sense
% to not modify \ctanpkg{tocbibind} overwrite of \csbc{tableofcontents}.  But
% let's obey this interpretation.
%    \begin{macrocode}
        \ifEtoc@keeporiginaltoc
        \else
           \let\tableofcontents\etoctableofcontents
        \fi
     }%
     {}%
   }%  
%    \end{macrocode}
% Maybe I should check if the options were already set.  I will simply
% make the message more generic.
%    \begin{macrocode}
   \@ifpackageloaded{tocbibind}
   {% tocbibind, perhaps with tocloft
      \if@dotoctoc
                 \ifEtoc@keeporiginaltoc
                   \else
                   \let\tableofcontents\etoctableofcontents
                 \fi
        \etocsetup{maintoctotoc,localtoctotoc}%
         \PackageInfo{etoc}{%
            Setting (or re-setting) the options `maintoctotoc' and\MessageBreak
            `localtoctotoc' to true as tocbibind was detected and\MessageBreak
            found to be configured for `TOC to toc'.\MessageBreak
            Reported at begin document}%
      \fi
      \if@dotoclof
       \ifEtoc@lof
        \etocsetup{localloftotoc}%
        \PackageInfo{etoc}{%
            Setting (or re-setting) `localloftotoc=true' as the\MessageBreak
            package tocbibind was detected and is configured for\MessageBreak
            `LOF to toc'. Reported at begin document}%
       \fi
      \fi
      \if@dotoclot
       \ifEtoc@lot
        \etocsetup{locallottotoc}%
        \PackageInfo{etoc}{%
            Setting (or re-setting) `locallottotoc=true' as the\MessageBreak
            package tocbibind was detected and is configured for\MessageBreak
            `LOT to toc'. Reported at begin document}%
       \fi
      \fi
   }% end of tocbibind branch
   {}%
  }% end of at begin document
}% end of not with memoir branch
%    \end{macrocode}
% \LaTeX\ 2021 fall release lets \csa{contentsline} always grab four
% arguments, so with \etocrelease{1.09e} |2021/09/23| we make sure our
% \csa{addtocontents} will always provide \csa{contentsline} with four
% arguments. This extra |{}| is done without checking LaTeX's version by
% laziness, as an impact on documents compiled with former LaTeX could be
% visible only with very special contexts that only the author himself would
% ever consider.
%
% Let's also add \csa{protected@file@percent} at \etocrelease{1.09e} although
% this is a priori of no relevance as \etoc reads the toc file with
% |\endlinechar=-1| regime.
%
% When using \csa{addcontentsline} nothing needs to be done as both things are
% handled by \LaTeX\ upstream.
%
% \etocrelease{1.2} executes the \csbc{ifEtoc@hyperref} test inside the fourth
% argument, rather than using one \csa{addtocontents} in each branch.
%    \begin{macrocode}
\def\Etoc@addtocontents #1#2{%
    \addtocontents {toc}{%
      \protect\contentsline{#1}{#2}{\thepage}{\ifEtoc@hyperref\@currentHref\fi}%
      \ifdefined\protected@file@percent\protected@file@percent\fi
    }%
}
\def\Etoc@addcontentsline@ #1#2#3{%
    \@namedef{toclevel@#1}{#3}\addcontentsline {toc}{#1}{#2}%
}
\DeclareRobustCommand*{\etoctoccontentsline}
    {\@ifstar{\Etoc@addcontentsline@}{\Etoc@addtocontents}}
\def\Etoc@addtocontents@immediately#1#2{%
    \begingroup
       \let\Etoc@originalwrite\write
       \def\write{\immediate\Etoc@originalwrite}%
       \Etoc@addtocontents{#1}{#2}%
    \endgroup
}
\def\Etoc@addcontentsline@@immediately#1#2#3{%
    \begingroup
       \let\Etoc@originalwrite\write
       \def\write{\immediate\Etoc@originalwrite}%
       \Etoc@addcontentsline@{#1}{#2}{#3}%
    \endgoroup
}
\DeclareRobustCommand*{\etocimmediatetoccontentsline}
    {\@ifstar{\Etoc@addcontentsline@@immediately}{\Etoc@addtocontents@immediately}}
%    \end{macrocode}
% Formerly a \LaTeX{} counter |etoc@tocdepth| was used but at
% \etocrelease{1.2} it has been replaced by macro-storage.
%    \begin{macrocode}
\def\Etoc@storetocdepth   {\xdef\Etoc@savedtocdepth{\number\c@tocdepth}}
\def\Etoc@restoretocdepth {\global\c@tocdepth\Etoc@savedtocdepth\relax}
\def\etocobeytoctocdepth {\def\etoc@settocdepth
                          {\afterassignment\Etoc@@nottoodeep \global\c@tocdepth}}
\def\Etoc@@nottoodeep {\ifnum\Etoc@savedtocdepth<\c@tocdepth
                          \global\c@tocdepth\Etoc@savedtocdepth\relax\fi }
\def\etocignoretoctocdepth {\let\etoc@settocdepth\@gobble }
\def\etocsettocdepth   {\futurelet\Etoc@nexttoken\Etoc@set@tocdepth }
\def\Etoc@set@tocdepth {\ifx\Etoc@nexttoken\bgroup
                            \expandafter\Etoc@set@tocdepth@
                       \else\expandafter\Etoc@set@toctocdepth
                       \fi }
\def\Etoc@set@tocdepth@ #1{\@ifundefined {Etoc@#1@@}
      {\PackageWarning{etoc}
          {Unknown sectioning unit #1, \protect\etocsettocdepth\space ignored}}
      {\global\c@tocdepth\csname Etoc@#1@@\endcsname}%
}
\def\Etoc@set@toctocdepth  #1#{\Etoc@set@toctocdepth@ }
\def\Etoc@set@toctocdepth@ #1{%
  \@ifundefined{Etoc@#1@@}%
   {\PackageWarning{etoc}
        {Unknown sectioning depth #1, \protect\etocsettocdepth.toc ignored}}%
   {\addtocontents {toc}
   {\protect\etoc@settocdepth\expandafter\protect\csname Etoc@#1@@\endcsname}}%
}
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\etocimmediatesettocdepth #1#{\Etoc@set@toctocdepth@immediately}
\def\Etoc@set@toctocdepth@immediately #1{%
  \@ifundefined{Etoc@#1@@}%
   {\PackageWarning{etoc}
        {Unknown sectioning depth #1, \protect\etocimmediatesettocdepth.toc ignored}}%
   {\begingroup
      \let\Etoc@originalwrite\write
      \def\write{\immediate\Etoc@originalwrite}%
      \addtocontents {toc}
      {\protect\etoc@settocdepth\expandafter\protect
       \csname Etoc@#1@@\endcsname}%
    \endgroup
   }%
}
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\etocdepthtag   #1#{\Etoc@depthtag }
\def\Etoc@depthtag  #1{\addtocontents {toc}{\protect\etoc@depthtag {#1}}}
%    \end{macrocode}
% \etocrelease{1.09f} adds \csbc{etocimmediatedepthtag.toc}.  This can serve in some
% circumstances, see user documentation.  Apologies for long delay to Norman
% Ramsey who reported problem and his fix in July... 2016!
%    \begin{macrocode}
\def\etocimmediatedepthtag   #1#{\Etoc@depthtag@immediately }
\def\Etoc@depthtag@immediately #1{%
  \begingroup
    \let\Etoc@originalwrite\write
    \def\write{\immediate\Etoc@originalwrite}%
    \addtocontents {toc}{\protect\etoc@depthtag {#1}}%
  \endgroup
}
\def\etocignoredepthtags {\let\etoc@depthtag \@gobble }
\def\etocobeydepthtags   {\let\etoc@depthtag \Etoc@depthtag@ }
\def\Etoc@depthtag@ #1{\@ifundefined{Etoc@depthof@#1}%
       {}% ignore in silence if tag has no associated depth
       {\afterassignment\Etoc@@nottoodeep
                 \global\c@tocdepth\csname Etoc@depthof@#1\endcsname}%
}
\def\etocsettagdepth #1#2{\@ifundefined{Etoc@#2@@}%
       {\PackageWarning{etoc}
         {Unknown sectioning depth #2, \protect\etocsettagdepth\space ignored}}%
       {\@namedef{Etoc@depthof@#1}{\@nameuse{Etoc@#2@@}}}%
}
%    \end{macrocode}
% We must cancel all \ctanpkg{tocvsec2} toc-related actions. But a check must be done
% for the memoir class, as its \ctanpkg{tocvsec2} emulation does not have the
% incompatible things etoc needs to revert.
%    \begin{macrocode}
\def\Etoc@tocvsec@err #1{\PackageError {etoc}
        {The command \protect#1\space is incompatible with `etoc'}
        {Use \protect\etocsettocdepth.toc as replacement}%
}%
\AtBeginDocument {%
  \@ifclassloaded{memoir}
    {\PackageInfo {etoc}
     {Regarding `memoir' class command \protect\settocdepth, consider\MessageBreak
     \protect\etocsettocdepth.toc as a drop-in replacement with more\MessageBreak
     capabilities (see `etoc' manual). \space
     Also, \protect\etocsettocdepth\MessageBreak
     and \protect\etocsetnexttocdepth\space should be used in place of\MessageBreak
     `memoir' command \protect\maxtocdepth\@gobble}%
    }%
    {\@ifpackageloaded {tocvsec2}{%
      \def\maxtocdepth  #1{\Etoc@tocvsec@err \maxtocdepth   }%
      \def\settocdepth  #1{\Etoc@tocvsec@err \settocdepth   }%
      \def\resettocdepth  {\@ifstar {\Etoc@tocvsec@err \resettocdepth }%
                                    {\Etoc@tocvsec@err \resettocdepth }%
                          }%
%    \end{macrocode}
% If \etoc is added to a \LaTeX{} document using already \ctanpkg{tocvsec2}.
%    \begin{macrocode}
      \def\save@tocdepth #1#2#3{}%
      \let\reset@tocdepth\relax
      \let\remax@tocdepth\relax
      \let\tableofcontents\etoctableofcontents
      \PackageWarningNoLine {etoc}
      {Package `tocvsec2' detected and its modification of\MessageBreak
       \protect\tableofcontents\space reverted. \space Use
       \protect\etocsettocdepth.toc\MessageBreak as a replacement
       for `tocvsec2' toc-related commands}%
     }% tocvsec2 loaded
     {}% tocvsec2 not loaded
    }%
}%
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\invisibletableofcontents {\etocsetnexttocdepth {-3}\tableofcontents }%
\def\invisiblelocaltableofcontents
                         {\etocsetnexttocdepth {-3}\localtableofcontents }%
\def\etocsetnexttocdepth #1{%
    \@ifundefined{Etoc@#1@@}
     {\PackageWarning{etoc}
       {Unknown sectioning unit #1, \protect\etocsetnextocdepth\space ignored}}
     {\Etoc@setnexttocdepth{\csname Etoc@#1@@\endcsname}}%
}%
\def\Etoc@setnexttocdepth#1{%
    \def\Etoc@tocdepthset{%
        \Etoc@tocdepthreset
        \edef\Etoc@tocdepthreset {%
               \global\c@tocdepth\the\c@tocdepth\space
               \global\let\noexpand\Etoc@tocdepthreset\noexpand\@empty
         }%
        \global\c@tocdepth#1%
        \global\let\Etoc@tocdepthset\@empty
    }%
}%
\let\Etoc@tocdepthreset\@empty
\let\Etoc@tocdepthset  \@empty
\def\etocsetlocaltop #1#{\Etoc@set@localtop}%
\def\Etoc@set@localtop #1{%
  \@ifundefined{Etoc@#1@@}%
   {\PackageWarning{etoc}
        {Unknown sectioning depth #1, \protect\etocsetlocaltop.toc ignored}}%
   {\addtocontents {toc}
   {\protect\etoc@setlocaltop\expandafter\protect\csname Etoc@#1@@\endcsname}}%
}%
%    \end{macrocode}
% placeholder
%    \begin{macrocode}
\def\etocimmediatesetlocaltop #1#{\Etoc@set@localtop@immediately}%
\def\Etoc@set@localtop@immediately #1{%
  \@ifundefined{Etoc@#1@@}%
   {\PackageWarning{etoc}
        {Unknown sectioning depth #1, \protect\etocimmediatesetlocaltop.toc ignored}}%
   {\begingroup
       \let\Etoc@originalwrite\write
       \def\write{\immediate\Etoc@originalwrite}%
       \addtocontents {toc}
           {\protect\etoc@setlocaltop\expandafter\protect
                                     \csname Etoc@#1@@\endcsname}%
    \endgroup
   }%
}%
%    \end{macrocode}
% \etocrelease{1.09i} would like to rename this to \csa{Etoc@setlocaltop}, for
% consistency with internal macros, but too late it is already in user |.toc| files.
%    \begin{macrocode}
\def\etoc@setlocaltop #1{%
  \ifnum#1=\Etoc@@six@@
   \Etoc@skipthisonetrue
  \else
   \Etoc@skipthisonefalse
%    \end{macrocode}
% MEMO: the \csbc{Etoc@level} thus continues receiving updates from various
% \csbc{etoc@setlocaltop} present in the |.toc| file even once the local toc
% is already done, but this has no importance, as the code in
% \csbc{Etoc@toctoc} after executing the code contents is not influenced by
% this but only by the final status of \csbc{Etoc@stackofends} remains the
% same.  And this gets updated via \csbc{Etoc@setlocaltop@doendsandbegin} (see
% below).
%
% I should check if not worthwile to move the \csbc{ifEtoc@stoptoc} test
% earlier.
%
% There should be two notions of local top.  One for a potential barrier,
% stopping a toc, the other for setting a local top.  These two should be
% distinct.  Or at least additional to this one which does both.  But then I
% would have to document.  And test.  And implement first.
%    \begin{macrocode}
   \global\let\Etoc@level #1%
   \global\let\Etoc@virtualtop #1%   
   \ifEtoc@localtoc
    \ifEtoc@stoptoc
     \Etoc@skipthisonetrue
    \else
     \ifEtoc@notactive
      \Etoc@skipthisonetrue
     \else
      \unless\ifnum\Etoc@level>\etoclocaltop
       \Etoc@skipthisonetrue
       \global\Etoc@stoptoctrue
      \fi
     \fi
    \fi
   \fi
  \fi
  \let\Etoc@next\@empty
  \ifEtoc@skipthisone
  \else
   \ifnum\Etoc@level>\c@tocdepth
   \else
    \ifEtoc@standardlines
    \else
%    \end{macrocode}
% So here the \csbc{etocsetlocaltop}|.toc| will cause various starts and
% finish parts to get executed, even for the somewhat fictitious levels.  But
% this may cause collaterals, in particular we have to be careful about the
% \csbc{ifEtoc@skipprefix} Boolean, which may be set to \csa{iftrue} in
% the \marg{start} part of the level style and thus needs to be reset to
% \csa{iffalse}.  This is done automatically in \csbc{Etoc@etoccontentsline@}
% but here we are not executing it so we need to add somewhere a
% |\global\Etoc@skipprefixfalse| (else we may impact rendering of subsequent
% level).  So we put it together with \csbc{Etoc@doendsandbegin} in a wrapper.
% This wrapper is also there to avoid a problem when the TOC is checked for
% emptiness, as we need then to be able to tell \csbc{etoc@setlocaltop} to
% not execute anything.
%
% This also stresses
% that the name of the macro is a bit of a misnomer, yes it serves to delimit
% local table of contents, but really it is implemented as a ghost of a
% sectioning unit which does have an impact (on the global TOC or local TOCs
% from encompassing levels), as it triggers when encountered the \marg{finish}
% portions of previous finer levels (and the \marg{finish} code of its own
% level will be executed sooner or later), and the \marg{start} code of
% subsequent finer levels (as well as its own \marg{start} code at least once,
% depending on how levels are nested).
%    \begin{macrocode}
     \let\Etoc@next\Etoc@setlocaltop@doendsandbegin
    \fi
   \fi
  \fi
  \Etoc@next
}%
%    \end{macrocode}
% It is important to reset the \csbc{ifEtoc@skipprefix} boolean, as is done in
% \csbc{Etoc@etoccontentsline@}.\par
%    \begin{macrocode}
\def\Etoc@setlocaltop@doendsandbegin{%
    \Etoc@doendsandbegin
    \global\Etoc@skipprefixfalse
}
\addtocontents {toc}{\protect\@ifundefined{etoctocstyle}%
           {\let\protect\etoc@startlocaltoc\protect\@gobble
            \let\protect\etoc@settocdepth\protect\@gobble
            \let\protect\etoc@depthtag\protect\@gobble
            \let\protect\etoc@setlocaltop\protect\@gobble}{}}%
%    \end{macrocode}
% Initializations.
%    \begin{macrocode}
\def\etocstandardlines {\Etoc@standardlinestrue}
\def\etoctoclines      {\Etoc@standardlinesfalse}
\etocdefaultlines
\etocstandardlines
\def\etocstandarddisplaystyle{%
    \PackageWarningNoLine{etoc}{%
      \string\etocstandarddisplaystyle \on@line\MessageBreak
      is deprecated. \space Please use \string\etocclasstocstyle}%
}
\expandafter\def\expandafter\etocclasstocstyle\expandafter{%
    \etocclasstocstyle
    \Etoc@classstyletrue
}
\def\etocetoclocaltocstyle{\Etoc@etocstyletrue}
\def\etocusertocstyle{\Etoc@etocstylefalse}
\etocclasstocstyle
\etocetoclocaltocstyle
\etocobeytoctocdepth
\etocobeydepthtags
\let\etocbeforetitlehook   \@empty
\let\etocaftertitlehook    \@empty
\let\etocaftercontentshook \@empty
\let\etocaftertochook      \@empty
%    \end{macrocode}
% |listings| abuses \csa{tableofcontents} for its \csa{lstlistoflistings}. It
% doesn't seem worth to let my version of \csbc{tableofcontents} have to check for
% this special circumstance. So at \etocrelease{1.09d}, simply add this (the
% boolean was added at \etocrelease{1.2}):
%    \begin{macrocode}
\def\etockeeporiginaltableofcontents
   {\Etoc@keeporiginaltoctrue\let\tableofcontents\etocoriginaltableofcontents}%
\endinput
%    \end{macrocode}
% \MakePercentComment
\Finale
%%
%% End of file `etoc.dtx'.
