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+%% LaTeX2e file `etocsnippet-21-A.tex'
+%% generated by the `filecontentshere' environment
+%% from source `etoc' on 2019/11/17.
+%%
+% 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