%
% Copyright (C) 1998-2023 Javier Bezos http://www.texnia.com
%
% This file may be distributed and/or modified under the conditions of
% the MIT License. A version can be found at the end of this file.
%
% Repository: https://github.com/jbezos/titlesec
%

\ProvidesPackage{titletoc}[2023/10/27 v2.16 TOC entries]

% The following tags are used:
% ttl@  : the generic one, shared with titlesec
% ttlb@ : starting punctuation for block format
% ttlm@ : and middle
% ttle@ : and ending
% ttll@ : section level
% ttlx@ : file extension
% 
% Fistly, comes the
% common stuff with titlesec
% ~~~~~~~~~~~~~~~~~~~~~~~~~~

\newif\ifttl@label
\newif\ifttl@fromblock
\newdimen\ttl@leftsep

\providecommand\titleline{%
  \@ifstar{\ttl@line@i{\hb@xt@\titlewidth}}%
          {\ttl@line@i{}}}

\def\ttl@line@i#1{%
  \@ifnextchar[{\ttl@line{#1}}{\ttl@line{#1}[s]}}

\def\ttl@line#1[#2]#3{%
  \vskip\topskip
  \hrule \@height \z@
  \nobreak
  \vskip-\topskip
  \begingroup
    \parindent\z@
    \everypar{}%
    \leftskip\z@
    \rightskip\z@   %  #1 is either \hb@xt@\titlewidth or empty:
    \@makebox[\hsize][#2]{\ttl@makeline{#1{#3}}}%
    \par
  \endgroup
  \hrule height \z@
  \nobreak}

% Fillers:

\providecommand\titlerule{\@ifstar{\ttl@row}{\ttl@rule}}

\let\ttl@leaders\xleaders

\def\ttl@row{\@ifnextchar[{\ttl@row@i}{\ttl@row@i[\wd\z@]}}
\def\ttl@row@i[#1]#2{%
  \ifvmode\expandafter\titleline\fi
  {\sbox\z@{#2}%
   \hspace{-#1}%
   \hskip\wd\z@
   \ttl@leaders\hb@xt@#1{\hss\box\z@}%
   \hfill\kern\z@}}

\def\ttl@rule{\@ifnextchar[{\ttl@rule@i}{\ttl@rule@i[.4pt]}}
\def\ttl@rule@i[#1]{%
  \ifvmode\expandafter\titleline\fi
  {\leaders\hrule height #1\hfill\kern\z@}}

\providecommand\filright{%
  \gdef\ttl@filleft##1{\hskip##1}%
  \gdef\ttl@filright##1{\hfill}%
  \let\\\@centercr
  \advance\rightskip\z@ \@plus 1fil\relax}
\providecommand\filleft{%
  \gdef\ttl@filleft##1{\hfill}%
  \gdef\ttl@filright##1{\hskip##1}%
  \let\\\@centercr
  \advance\leftskip\z@ \@plus 1fil
  \parfillskip\z@}
\providecommand\filcenter{\filleft\filright
  \gdef\ttl@filleft##1{\hfill}}
\providecommand\fillast{%
  \gdef\ttl@filleft##1{\hfill}%
  \gdef\ttl@filright##1{\hfill}%
  \let\\\@centercr
  \filleft\advance\rightskip\z@ \@plus -1fil
  \parfillskip\z@ \@plus 2fil\relax}

% Now, the specific titletoc part

% User interface
% ~~~~~~~~~~~~~~
% Tools:

\DeclareOption{dotinlabels}{\def\ttl@idot{.}}
\DeclareOption{nodotinlabels}{\let\ttl@idot\@empty}

\DeclareOption{rigidseps}{%
  \def\ttl@contentsstretch{\vskip\z@}}
\DeclareOption{rubberseps}{%
  \def\ttl@contentsstretch{\vskip\z@\@plus.1\p@}}

\DeclareOption{leftlabels}{%
  \renewcommand\numberline[1]{\hb@xt@\@tempdima{#1\ttl@idot\hfil}}%
  \newcommand\contentslabel[2][\thecontentslabel\ttl@idot]{%
%   \let\ttl@a\thecontentslabel   %%%%% For the star variant
%   \def\thecontentslabel{#2}%    %%% To be fully implemented... when?
%   \setbox\z@\hbox{#1}%
%   \dimen@\wd\z@
%   \let\thecontentslabel\ttl@a
%   \hspace*{-\dimen@}\hb@xt@\dimen@{#1\hfil}
%  \show\ttl@b \show\ttl@a
    \hspace*{-#2}\hb@xt@#2{#1\hfil}}}

\DeclareOption{rightlabels}{%
  \renewcommand\numberline[1]{\hb@xt@\@tempdima{\hss#1\ttl@idot\enspace}}%
  \let\contentslabel\relax
  \newcommand\contentslabel[2][\thecontentslabel\ttl@idot\enspace]{%
    \hspace*{-#2}\hb@xt@#2{\hfil#1}}}

\newcommand\contentspage[1][\thecontentspage]{%
  \hb@xt@\@pnumwidth{\hfil#1}%
  \hspace*{-\@pnumwidth}}

\newcommand\contentspush[1]{%
  \sbox\z@{#1}%
  \xdef\ttl@b{\advance\leftskip\the\wd\z@}%
  \aftergroup\ttl@b
  \leavevmode\llap{\box\z@}}

% General commands. A level register. Explicit numbers
% because they are used in csnames. Ignored if already defined.

\ifx\ttll@section\@undefined

  \@ifundefined{chapter}
    {\def\ttll@part{0}}
    {\def\ttll@part{-1}%
     \def\ttll@chapter{0}}
  \def\ttll@section{1}
  \def\ttll@subsection{2}
  \def\ttll@subsubsection{3}
  \def\ttll@paragraph{4}
  \def\ttll@subparagraph{5}

\fi

% We make sure that a series of * entries are finished and
% that a \titlecontents in the middle of a document is
% written to the right file. We need ship out floats before;
% that's very tricky.

\newcommand\contentsuse[2]{%
  \expandafter\def\csname ttlx@#1\endcsname{#2}%
  \expandafter\def\csname ttll@#1\endcsname{-1000}%
  \expandafter\def\expandafter\ttl@finishall\expandafter{%
    \ttl@finishall
    \@writefile{#2}{\contentsfinish}}}

\def\ttl@finishall{\@writefile{toc}{\contentsfinish}}

\AtEndDocument{%
  \ttl@startlists
  \let\ttl@newpage\newpage
  \def\newpage{%
    \let\newpage\ttl@newpage
    \newpage
    \if@filesw
      \immediate\write\@mainaux{\string\ttl@finishall}%
    \fi}}

\contentsuse{figure}{lof}
\contentsuse{table}{lot}

\def\contentsfinish{%
  \ifttl@fromblock
    \xdef\ttl@b{-10000}% ships out any saved punctuation
    \ttl@preend
    \@@par
    \endgroup
    \global\ttl@fromblockfalse
  \fi}

% The two basic commands. First \contentsmargin:

\newcommand\contentsmargin[1][\z@]{%
  \def\ttl@corr{#1}\def\@pnumwidth}

% The following is the value of \contentsmargin when
% used inside \ttl@tocenty (ie, \titlecontents).

\newcommand\ttl@margin[2][\z@]{%
  \def\ttl@corr{#1}%
  \advance\rightskip-\@pnumwidth\relax
  \advance\rightskip#2\relax
  \def\@pnumwidth{#2}}

% \titlecontents deals with concepts, not commands; hence no
% escape char

\newcommand\titlecontents{%
  \@ifstar{\ttl@contents{\z@}}%
          {\ttl@contents{\@ne}}}

\def\ttl@contents#1#2{%
  \@ifnextchar[{\ttl@contents@i{#1}{#2}}%
               {\ttl@contents@i{#1}{#2}[\@nil]}}

% A dirty hack to fix wrong destinations with hyperref. But activate
% only if some inline entry is defined (ie, #1 = 0):
\let\ttl@fixhyperref\relax

\def\ttl@contents@i#1#2[#3]#4#5#6#7{%
  \ifcase#1\relax
    \def\ttl@fixhyperref{%
      \ifx\Hy@tocdestname\@undefined\else
        \global\let\Hy@tocdestname\Hy@tocdestname
      \fi}%
  \fi
  \expandafter\def\csname l@#2\endcsname
    {\ttl@tocentry{#1}{#2}{#3}{#4}{{#5}{#6}}{#7}}%
  \@ifnextchar[{\ttl@contents@ii{#1}{#2}}%
               {\ttl@contents@ii{#1}{#2}[]}}

\def\ttl@contents@ii#1#2[#3]{%
  \ifcase#1\relax
    \expandafter\@firstoftwo
  \else
    \expandafter\@secondoftwo
  \fi
  {\@ifnextchar[{\ttl@contents@iii{#1}{#2}{#3}}%
                {\ttl@contents@iii{#1}{#2}{#3}[]}}%
  {\ttl@contents@iv{#1}{#2}{#3}[][]}}

\def\ttl@contents@iii#1#2#3[#4]{%
  \@ifnextchar[{\@tempswatrue\ttl@contents@iv{#1}{#2}{#3}[#4]}%
               {\@tempswafalse\ttl@contents@iv{#1}{#2}{#3}[#4][]}}

\def\ttl@contents@iv#1#2#3[#4][#5]{%
  \ifcase#1\relax
    \if@tempswa
      \ttl@contents@v{#2}{#3}{#4}{#5}%
    \else
      \ttl@contents@v{#2}{}{#3}{#4}%
    \fi
  \else
    \ttl@contents@v{#2}{}{}{#3}%
  \fi}

\def\ttl@contents@v#1#2#3#4{%
  \expandafter\def\csname ttlb@#1\endcsname{#2}%
  \expandafter\def\csname ttlm@#1\endcsname{#3}%
  \expandafter\def\csname ttle@#1\endcsname{#4}}

\begingroup
\catcode`\-=12\catcode`\>=12
\gdef\ttl@strip#1->#2\@@#3{\def#3{#2}}
\endgroup

\AtBeginDocument{%
  \def\ttl@change@i#1#2#3#4#5#6#7{%
    \expandafter\def\csname l@#2\endcsname
      {\ttl@tocentry{#1}{#2}{#3}{#4}{{#5}{#6}}{#7}}}%
  \let\ttl@change@v\ttl@contents@v
  \def\ttl@contents@i#1#2[#3]#4#5#6#7{%
    \def\ttl@a{\ttl@change@i{#1}{#2}{#3}{#4}{#5}{#6}{#7}}%
    \@ifnextchar[{\ttl@contents@ii{#1}{#2}}%
                 {\ttl@contents@ii{#1}{#2}[]}}%
  \def\ttl@contents@v#1#2#3#4{%
    \def\ttl@b{\ttl@change@v{#1}{#2}{#3}{#4}}%
    \expandafter\ttl@strip\meaning\ttl@a\@@\ttl@a
    \expandafter\ttl@strip\meaning\ttl@b\@@\ttl@b
    \edef\ttl@c{%
      \expandafter\ifx\csname ttlx@#2\endcsname\relax
        toc%
      \else
        \csname ttlx@#2\endcsname
      \fi}%
    \addtocontents{\ttl@c}{\ttl@a\relax}%
    \addtocontents{\ttl@c}{\ttl@b\relax}}}

% Printing the toc entry
% ~~~~~~~~~~~~~~~~~~~~~~

\def\ttl@lasttoc{-1000} % An inital dummy assignment

\def\ttl@providettll#1#2{%
  \@ifundefined{ttll@#1#2}%
    {\global\expandafter\let\csname ttll@#1#2\expandafter\endcsname
        \csname ttll@#2\endcsname}%
    {}%
  \@ifundefined{ttll@#1#2}%
    {\PackageWarning{titletoc}%
       {Unknown TOC type #1#2. I'll set it for you with\MessageBreak
        level -1000.}%
     \expandafter\gdef\csname ttll@#1#2\endcsname{-1000}}%
    {}}

% 1 ifblock, 2 sect name, 3 left, 4 before,
% 5 {with}{without}, 6 filler/page, 7  title 8 pageno

\let\ttl@preend\@empty

\def\ttl@outpunct{%
  \ifnum\ttl@c>\ttl@b\relax
    \ttl@preend
  \fi}

\def\ttl@outblock#1#2#3{%
  \ifcase#1\relax
    \ifnum\ttl@b>\ttl@a\relax
      \begingroup
      \protected@edef\ttl@preend{%
        \@nameuse{ttle@#2}%
        \endgroup
        \protect\@namedef{ttl@c}{\ttl@a}%
        \protect\ttl@outpunct}%
      #3%
      \@nameuse{ttlb@#2}%
    \else\ifnum\ttl@b<\ttl@a\relax
      \ttl@preend
      \@nameuse{ttlm@#2}%
    \else
      \@nameuse{ttlm@#2}%
    \fi\fi
  \else
    \ttl@preend
    \@@par
    \endgroup
    \@firstoftwo
  \fi}

\def\ttl@outnoblock#1#2#3{%
  \begingroup
  \ifnum\ttl@b>\ttl@a
    \nobreak
  \else\ifnum\ttl@b<\ttl@a
    \addpenalty{\@secpenalty}%
  \else
    \addpenalty{\z@}% 
  \fi\fi
  \ttl@contentsstretch
  \nobreak
  \ifcase#1\relax\else\interlinepenalty\@M\fi
  \parindent\z@
  \ifx\@nil#2%
    \PackageError{titletoc}{Unimplemented}%
	    {The optional argument is currently mandatory}%
  \else
    \setlength\leftskip{#2}%
  \fi
  \setlength\rightskip{\@pnumwidth}%
  \let\contentsmargin\ttl@margin
  \def\ttl@makeline##1{##1}%
  #3%
  \addtolength{\parfillskip}{-\ttl@corr}%
  \addtolength{\rightskip}{\ttl@corr}%
  \let\ttl@leaders\leaders}

\def\ttl@tocentry#1#2#3#4#5#6#7#8{%
  \ttl@fixhyperref
  \ttl@providettll{}{#2}%
  \xdef\ttl@b{\csname ttll@#2\endcsname}%
  \ifnum\ttl@b>\c@tocdepth\else
    \ifnum\ttl@b<\ttl@toctop\else
      \edef\ttl@a{\ttl@lasttoc}%
      \gdef\thecontentspage{#8}%
      \global\let\thecontentslabel\@empty
      \global\ttl@labelfalse
      \sbox\z@{%  Unused box. It just catch the numberline
        \def\numberline##1{\global\ttl@labeltrue\gdef\thecontentslabel{##1}}%
        #7}%    \ttl@b = current     \ttl@a = previous
      \ifttl@fromblock
        \ttl@outblock{#1}{#2}{#4}%
      \else
        \ttl@outnoblock{#1}{#3}{#4}%
      \fi
      \def\numberline##1{\ignorespaces}%
      \ifttl@label
        {\leavevmode\strut\@firstoftwo#5{#7}\strut\kern\z@}%
      \else
        {\leavevmode\strut\@secondoftwo#5{#7}\strut\kern\z@}%
      \fi
      {#6}%
      \ifcase#1\relax
        \ifttl@fromblock\else
          \protected@edef\ttl@preend{\@nameuse{ttle@#2}}%
        \fi
        \global\ttl@fromblocktrue
      \else
        \@@par
        \nobreak
        \csname ttle@#2\endcsname
        \endgroup
        \global\ttl@fromblockfalse
      \fi
      \xdef\ttl@lasttoc{\csname ttll@#2\endcsname}%
    \fi
  \fi
  \ignorespaces}

\newcommand\dottedcontents{}
\def\dottedcontents#1[#2]#3#4#5{%
  \titlecontents{#1}[#2]{#3}%
    {\contentslabel{#4}}%
    {\hspace*{-#4}}%
    {\titlerule*[#5]{.}\contentspage}}

\ExecuteOptions{leftlabels,nodotinlabels,rubberseps}

\ProcessOptions

% Multiple tocs and lists
% ~~~~~~~~~~~~~~~~~~~~~~~~
% After some attemps to adapt titletoc to minitoc, I decided to
% implement my own solution, because entries as written by minitoc are
% non standard. The new commands provides a good deal of flexibility,
% too.

\let\ttl@startlists\@empty
\let\ttl@writefile\@writefile

\def\ttl@partialtoc{ptc}
\def\ttl@partiallof{plf}
\def\ttl@partiallot{plt}

\def\ttl@writepartial#1#2{%
  \ttl@topartial{toc}{#1}{#2}%
  \ttl@topartial{lof}{#1}{#2}%
  \ttl@topartial{lot}{#1}{#2}%
  \ttl@writefile{#1}{#2}}

\def\ttl@topartial#1#2#3{%
  \def\ttl@a{#1}%
  \def\ttl@b{#2}%
  \ifx\ttl@a\ttl@b
     \ttl@writefile{\csname ttl@partial#2\endcsname}{#3}%
  \fi}

\def\ttl@xstartlist#1{%
  \@ifundefined{ttl@startlist#1}{%
    \global\@namedef{ttl@startlist#1}{%
      \let\@writefile\ttl@writepartial
      \if@filesw
        \expandafter\newwrite\csname tf@#1\endcsname
        \immediate\openout\csname tf@#1\endcsname\jobname.#1\relax
      \fi
      \@nobreakfalse}%
    \expandafter\gdef\expandafter\ttl@startlists\expandafter{%
      \ttl@startlists
      \@nameuse{ttl@startlist#1}}}{}}

\newcommand\startcontents[1][default]{\startlist[#1]{toc}}

\newcommand\startlist[2][default]{%
  \expandafter\ttl@xstartlist\csname ttl@partial#2\endcsname
  \@ifundefined{c@ttl@#2@#1}%
    {\newcounter{ttl@#2@#1}}%
    {\stoplist[#1]{#2}}%  
  \stepcounter{ttl@#2@#1}%
  \resumelist[#1]{#2}}

\newcommand\stopcontents[1][default]{\stoplist[#1]{toc}}

\newcommand\stoplist[2][default]{%
  \protected@write\@auxout{}{%
    \string\ttl@writefile{\csname ttl@partial#2\endcsname}{%
       \string\ttl@stoptoc{#1@\arabic{ttl@#2@#1}}}}}

\newcommand\resumecontents[1][default]{\resumelist[#1]{toc}}

\newcommand\resumelist[2][default]{%
  \protected@write\@auxout{}{%
    \string\ttl@writefile{\csname ttl@partial#2\endcsname}{%
       \string\ttl@starttoc{#1@\arabic{ttl@#2@#1}}}}}

\def\ttl@starttoc#1{%
  \ifx\@writefile\@gobbletwo\else % Is this test necessary?
    \def\ttl@a{#1}%
    \ifx\ttl@a\ttl@ptoc
      \let\contentsline\ttl@contentsline
    \fi
  \fi
  \ignorespaces}

\def\ttl@stoptoc#1{%
  \ifx\@writefile\@gobbletwo\else % Is this test necessary?
    \def\ttl@a{#1}%
    \ifx\ttl@a\ttl@ptoc
      \let\contentsline\ttl@gobblecontents
    \fi
  \fi
  \ignorespaces}

\newcommand\printcontents[3][default]{%
  \def\ttl@a{[#1]{toc}{#2}{#3}}%
  \ttl@preprint}

\newcommand\printlist[3][default]{%
  \def\ttl@a{[#1]{#2}{#3}{-1001}}%
  \ttl@preprint}

\newcommand\ttl@preprint[2][\c@tocdepth]{%
  \expandafter\ttl@printlist\ttl@a{#1}{#2}}

% 1:name 2:list 3:prefix 4:startlevel 5:depth 6:toccode
\newcommand\ttl@printlist[6][default]{%
  \begingroup
    \@ifundefined{c@ttl@#2@#1}%
      {\PackageError{titletoc}{No partial #2 named #1}%
          {You must start before a partial toc/list\MessageBreak
          with \string/startcontents/\string\startlist.}}{}%
    \edef\ttl@ptoc{#1@\arabic{ttl@#2@#1}}%
    \def\ttl@toctop{#4}%
    \c@tocdepth=#5\relax
    #6%
    \let\ttl@xcontentsline\contentsline
    \let\contentsline\ttl@gobblecontents
    \def\ttl@contentsline##1{%
      \ttl@providettll{#3}{##1}%
      \@ifundefined{l@#3##1}%
        {\ttl@xcontentsline{##1}}%
        {\ttl@xcontentsline{#3##1}}}%
    \makeatletter
    \@input{\jobname.\csname ttl@partial#2\endcsname}%
    \makeatother
    \@nobreakfalse
  \endgroup}

\AtBeginDocument{%
  \ifx\ttl@gobblecontents\@undefined
    \def\ttl@gobblecontents#1#2#3#4{\ignorespaces}%
  \fi}

\def\ttl@toctop{-1000}

% Now the we add \contentsfinish to the current definitions and a
% "selector" for partial tocs with a wrapper for the original
% definitions (saved as \ttl@savel@#1).

\def\ttl@lselect#1{%
  \ttl@fixhyperref
  \ifnum\csname ttll@#1\endcsname>\c@tocdepth\else
    \contentsfinish
  \fi
  \ifnum\csname ttll@#1\endcsname<\ttl@toctop\relax
    \expandafter\@gobbletwo
  \else
    \expandafter\expandafter\csname ttl@savel@#1\endcsname
  \fi}

\let\ttl@savel@part\l@part
\def\l@part{\ttl@lselect{part}}

\let\ttl@savel@chapter\l@chapter
\def\l@chapter{\ttl@lselect{chapter}}

\let\ttl@savel@section\l@section
\def\l@section{\ttl@lselect{section}}

\let\ttl@savel@subsection\l@subsection
\def\l@subsection{\ttl@lselect{subsection}}

\let\ttl@savel@subsubsection\l@subsubsection
\def\l@subsubsection{\ttl@lselect{subsubsection}}

\let\ttl@savel@paragraph\l@paragraph
\def\l@paragraph{\ttl@lselect{paragraph}}

\let\ttl@savel@subparagraph\l@subparagraph
\def\l@subparagraph{\ttl@lselect{subparagraph}}

\let\ttl@savel@figure\l@figure
\def\l@figure{\ttl@lselect{figure}}

\let\ttl@savel@table\l@table
\def\l@table{\ttl@lselect{table}}

\@tempskipa\@pnumwidth
\edef\@pnumwidth{\the\@tempskipa}
\advance\@tempskipa-\@tocrmarg
\edef\ttl@corr{-\the\@tempskipa}

\endinput

MIT License
-----------

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.