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Filename : sphinxpackagefootnote.sty
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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{sphinxpackagefootnote}%
 [2021/02/04 v1.1d footnotehyper adapted to sphinx (Sphinx team)]
% Provides support for this output mark-up from Sphinx latex writer:
% - footnote environment
% - savenotes environment (table templates)
% - \sphinxfootnotemark
%
%%
%% Package: sphinxpackagefootnote
%% Version: based on footnotehyper.sty 2021/02/04 v1.1d
%% as available at https://www.ctan.org/pkg/footnotehyper
%% License: the one applying to Sphinx
%%
%% Refer to the PDF documentation  at https://www.ctan.org/pkg/footnotehyper for
%% the code comments.
%%
%% Differences:
%% 1. a partial tabulary compatibility layer added (enough for Sphinx mark-up),
%% 2. use of \spx@opt@BeforeFootnote from sphinx.sty,
%% 3. use of \sphinxunactivateextrasandspace from sphinx.sty,
%% 4. macro definition \sphinxfootnotemark,
%% 5. macro definition \sphinxlongtablepatch
%% 6. replaced some \undefined by \@undefined
\newif\iffootnotehyperparse\footnotehyperparsetrue
\DeclareOption*{\PackageWarning{sphinxpackagefootnote}{Option `\CurrentOption' is unknown}}%
\ProcessOptions\relax
\newbox\FNH@notes
\newtoks\FNH@toks % 1.1c
\newdimen\FNH@width
\let\FNH@colwidth\columnwidth
\newif\ifFNH@savingnotes
\AtBeginDocument {%
    \let\FNH@latex@footnote    \footnote
    \let\FNH@latex@footnotetext\footnotetext
    \let\FNH@H@@footnotetext   \@footnotetext
    \let\FNH@H@@mpfootnotetext \@mpfootnotetext
    \newenvironment{savenotes}
        {\FNH@savenotes\ignorespaces}{\FNH@spewnotes\ignorespacesafterend}%
    \let\spewnotes      \FNH@spewnotes
    \let\footnote       \FNH@footnote
    \let\footnotetext   \FNH@footnotetext
    \let\endfootnote    \FNH@endfntext
    \let\endfootnotetext\FNH@endfntext
    \@ifpackageloaded{hyperref}
     {\ifHy@hyperfootnotes
         \let\FNH@H@@footnotetext\H@@footnotetext
         \let\FNH@H@@mpfootnotetext\H@@mpfootnotetext
      \else
         \let\FNH@hyper@fntext\FNH@nohyp@fntext
      \fi}%
     {\let\FNH@hyper@fntext\FNH@nohyp@fntext}%
}%
\def\FNH@hyper@fntext{\FNH@fntext\FNH@hyper@fntext@i}%
\def\FNH@nohyp@fntext{\FNH@fntext\FNH@nohyp@fntext@i}%
\def\FNH@fntext #1{%
  \ifx\ifmeasuring@\@undefined
    \expandafter\@secondoftwo\else\expandafter\@firstofone\fi
% these two lines modified for Sphinx (tabulary compatibility):
    {\ifmeasuring@\expandafter\@gobbletwo\else\expandafter\@firstofone\fi}%
    {\ifx\equation$\expandafter\@gobbletwo\fi #1}%$
}%
\long\def\FNH@hyper@fntext@i#1{%
  \global\setbox\FNH@notes\vbox
  {\unvbox\FNH@notes
   \FNH@startnote
   \@makefntext
    {\rule\z@\footnotesep\ignorespaces
     \ifHy@nesting\expandafter\ltx@firstoftwo
             \else\expandafter\ltx@secondoftwo
     \fi
     {\expandafter\hyper@@anchor\expandafter{\Hy@footnote@currentHref}{#1}}%
     {\Hy@raisedlink
       {\expandafter\hyper@@anchor\expandafter{\Hy@footnote@currentHref}%
       {\relax}}%
      \let\@currentHref\Hy@footnote@currentHref
      \let\@currentlabelname\@empty
      #1}%
     \@finalstrut\strutbox
    }%
   \FNH@endnote
  }%
}%
\long\def\FNH@nohyp@fntext@i#1{%
  \global\setbox\FNH@notes\vbox
  {\unvbox\FNH@notes
   \FNH@startnote
   \@makefntext{\rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}%
   \FNH@endnote
  }%
}%
\def\FNH@startnote{%
  \hsize\FNH@colwidth
  \interlinepenalty\interfootnotelinepenalty
  \reset@font\footnotesize
  \floatingpenalty\@MM
  \@parboxrestore
  \protected@edef\@currentlabel{\csname p@\@mpfn\endcsname\@thefnmark}%
  \color@begingroup
}%
\def\FNH@endnote{\color@endgroup}%
\def\FNH@savenotes{%
  \begingroup
  \ifFNH@savingnotes\else
    \FNH@savingnotestrue
    \let\@footnotetext    \FNH@hyper@fntext
    \let\@mpfootnotetext  \FNH@hyper@fntext
    \let\H@@mpfootnotetext\FNH@nohyp@fntext
    \FNH@width\columnwidth
    \let\FNH@colwidth\FNH@width
    \global\setbox\FNH@notes\box\voidb@x
    \let\FNH@thempfn\thempfn
    \let\FNH@mpfn\@mpfn
    \ifx\@minipagerestore\relax\let\@minipagerestore\@empty\fi
    \expandafter\def\expandafter\@minipagerestore\expandafter{%
      \@minipagerestore
      \let\thempfn\FNH@thempfn
      \let\@mpfn\FNH@mpfn
    }%
  \fi
}%
\def\FNH@spewnotes {%
  \if@endpe\ifx\par\@@par\FNH@toks{}\else
     \FNH@toks\expandafter{\expandafter
              \def\expandafter\par\expandafter{\par}\@endpetrue}%
     \expandafter\expandafter\expandafter
     \FNH@toks
     \expandafter\expandafter\expandafter
     {\expandafter\the\expandafter\FNH@toks
      \expandafter\def\expandafter\@par\expandafter{\@par}}%
     \expandafter\expandafter\expandafter
     \FNH@toks
     \expandafter\expandafter\expandafter
     {\expandafter\the\expandafter\FNH@toks
      \expandafter\everypar\expandafter{\the\everypar}}\fi
  \else\FNH@toks{}\fi
  \expandafter
  \endgroup\the\FNH@toks
  \ifFNH@savingnotes\else
   \ifvoid\FNH@notes\else
    \begingroup
     \let\@makefntext\@empty
     \let\@finalstrut\@gobble
     \let\rule\@gobbletwo
     \ifx\@footnotetext\@mpfootnotetext
        \expandafter\FNH@H@@mpfootnotetext
     \else
        \expandafter\FNH@H@@footnotetext
     \fi{\unvbox\FNH@notes}%
    \endgroup
   \fi
  \fi
}%
\def\FNH@footnote@envname    {footnote}%
\def\FNH@footnotetext@envname{footnotetext}%
\def\FNH@footnote{%
% this line added for Sphinx:
    \spx@opt@BeforeFootnote
    \ifx\@currenvir\FNH@footnote@envname
        \expandafter\FNH@footnoteenv
    \else
        \expandafter\FNH@latex@footnote
    \fi
}%
\def\FNH@footnoteenv{%
% this line added for Sphinx (footnotes in parsed literal blocks):
    \catcode13=5 \sphinxunactivateextrasandspace
    \@ifnextchar[%
      \FNH@footnoteenv@i %]
      {\stepcounter\@mpfn
       \protected@xdef\@thefnmark{\thempfn}%
       \@footnotemark
       \def\FNH@endfntext@fntext{\@footnotetext}%
       \FNH@startfntext}%
}%
\def\FNH@footnoteenv@i[#1]{%
    \begingroup
     \csname c@\@mpfn\endcsname #1\relax
     \unrestored@protected@xdef\@thefnmark{\thempfn}%
    \endgroup
    \@footnotemark
    \def\FNH@endfntext@fntext{\@footnotetext}%
    \FNH@startfntext
}%
\def\FNH@footnotetext{%
    \ifx\@currenvir\FNH@footnotetext@envname
        \expandafter\FNH@footnotetextenv
    \else
        \expandafter\FNH@latex@footnotetext
    \fi
}%
\def\FNH@footnotetextenv{%
    \@ifnextchar[%
      \FNH@footnotetextenv@i %]
      {\protected@xdef\@thefnmark{\thempfn}%
       \def\FNH@endfntext@fntext{\@footnotetext}%
       \FNH@startfntext}%
}%
\def\FNH@footnotetextenv@i[#1]{%
    \begingroup
     \csname c@\@mpfn\endcsname #1\relax
     \unrestored@protected@xdef\@thefnmark{\thempfn}%
    \endgroup
    \ifFNH@savingnotes
      \def\FNH@endfntext@fntext{\FNH@nohyp@fntext}%
    \else
      \def\FNH@endfntext@fntext{\FNH@H@@footnotetext}%
    \fi
    \FNH@startfntext
}%
\def\FNH@startfntext{%
  \setbox\z@\vbox\bgroup
    \FNH@startnote
    \FNH@prefntext
    \rule\z@\footnotesep\ignorespaces
}%
\def\FNH@endfntext {%
    \@finalstrut\strutbox
    \FNH@postfntext
    \FNH@endnote
    \egroup
  \begingroup
    \let\@makefntext\@empty\let\@finalstrut\@gobble\let\rule\@gobbletwo
    \FNH@endfntext@fntext {\unvbox\z@}%
  \endgroup
}%
\let\FNH@prefntext\@empty
\let\FNH@postfntext\@empty
\AtBeginDocument{\iffootnotehyperparse\expandafter\FNH@check\fi}%
\def\FNH@safeif#1{%
   \iftrue\csname if#1\endcsname\csname fi\endcsname\expandafter\@firstoftwo
   \else\csname fi\endcsname\expandafter\@secondoftwo
   \fi
}%
\def\FNH@check{%
   \ifx\@makefntextFB\@undefined\expandafter\FNH@check@
                           \else\expandafter\FNH@frenchb@
   \fi
}%
\def\FNH@frenchb@{%
   \def\FNH@prefntext{%
     \localleftbox{}%
     \let\FBeverypar@save\FBeverypar@quote
     \let\FBeverypar@quote\relax
     \FNH@safeif{FB@koma}%
       {\FNH@safeif{FBFrenchFootnotes}%
          {\ifx\footnote\thanks
             \let\@@makefnmark\@@makefnmarkTH
             \@makefntextTH{} % space as in french.ldf
           \else
             \let\@@makefnmark\@@makefnmarkFB
             \@makefntextFB{} % space as in french.ldf
             \fi
          }{\let\@@makefnmark\@@makefnmarkORI
             \@makefntextORI{}% no space as in french.ldf
          }%
       }%
       {\FNH@safeif{FBFrenchFootnotes}%
          {\@makefntextFB{}}%
          {\@makefntextORI{}}%
       }%
   }%
   \def\FNH@postfntext{%
     \let\FBeverypar@quote\FBeverypar@save
     \localleftbox{\FBeveryline@quote}%
   }%
}%
\def\FNH@check@{%
    \expandafter\FNH@check@a\@makefntext{1.2!3?4,}%
                \FNH@@@1.2!3?4,\FNH@@@\relax
}%
\long\def\FNH@check@a #11.2!3?4,#2\FNH@@@#3{%
    \ifx\relax#3\expandafter\FNH@checkagain@
    \else
      \def\FNH@prefntext{#1}\def\FNH@postfntext{#2}%
      \expandafter\FNH@check@b
    \fi
}%
\def\FNH@checkagain@{%
    \expandafter\FNH@checkagain@a
    \detokenize\expandafter{\@makefntext{1.2!3?4,}}\relax\FNH@@@
}%
\edef\FNH@temp{\noexpand\FNH@checkagain@a ##1\string{1.2!3?4,\string}}%
\expandafter\def\FNH@temp#2#3\FNH@@@{%
    \ifx\relax#2%
      \def\FNH@prefntext{\@makefntext{}}%
    \else\FNH@bad@makefntext@alert
    \fi
}%
\def\FNH@check@b #1\relax{%
    \expandafter\expandafter\expandafter\FNH@check@c
    \expandafter\meaning\expandafter\FNH@prefntext
    \meaning\FNH@postfntext1.2!3?4,\FNH@check@c\relax
}%
\def\FNH@check@c #11.2!3?4,#2#3\relax{%
    \ifx\FNH@check@c#2\else\FNH@bad@makefntext@alert\fi
}%
% slight reformulation for Sphinx
\def\FNH@bad@makefntext@alert{%
  \PackageWarningNoLine{sphinxpackagefootnote}%
    {Footnotes will be sub-optimal, sorry. This is due to the document class or^^J
  some package modifying macro \string\@makefntext.^^J
  You can try to report this incompatibility at^^J
  https://github.com/sphinx-doc/sphinx with this info:}%
    \typeout{\meaning\@makefntext}%
    \let\FNH@prefntext\@empty\let\FNH@postfntext\@empty
}%
% this macro from original footnote.sty is not used anymore by Sphinx
% but for simplicity sake let's just keep it as is
\def\makesavenoteenv{\@ifnextchar[\FNH@msne@ii\FNH@msne@i}%]
\def\FNH@msne@i #1{%
  \expandafter\let\csname FNH$#1\expandafter\endcsname %$
                  \csname #1\endcsname
  \expandafter\let\csname endFNH$#1\expandafter\endcsname %$
                  \csname end#1\endcsname
  \FNH@msne@ii[#1]{FNH$#1}%$
}%
\def\FNH@msne@ii[#1]#2{%
  \expandafter\edef\csname#1\endcsname{%
    \noexpand\savenotes
    \expandafter\noexpand\csname#2\endcsname
  }%
  \expandafter\edef\csname end#1\endcsname{%
    \expandafter\noexpand\csname end#2\endcsname
    \noexpand\expandafter
    \noexpand\spewnotes
    \noexpand\if@endpe\noexpand\@endpetrue\noexpand\fi
  }%
}%
%
% some extras for Sphinx :
% \sphinxfootnotemark: usable in section titles and silently removed from TOCs.
\def\sphinxfootnotemark [#1]%
   {\ifx\thepage\relax\else\sphinxfootref{#1}\fi}%
% \sphinxfootref:
% - \spx@opt@BeforeFootnote is from BeforeFootnote sphinxsetup option
% - \ref:
%     the latex.py writer inserts a \phantomsection\label{<scope>.<num>}
%     whenever
%     - the footnote was explicitly numbered in sources,
%     - or it was in restrained context and is rendered using footnotetext
%
%     These are the two types of footnotes that \sphinxfootnotemark must
%     handle. But for explicitly numbered footnotes the same number
%     can be found in document. So a secondary part in  <scope> is updated
%     at each novel such footnote to know what is the target from then on
%     for \sphinxfootnotemark and already encountered [1], or [2],...
%
% LaTeX package varioref is not supported by hyperref (from its doc: "There
% are too many problems with varioref. Nobody has time to sort them out.
% Therefore this package is now unsupported.") So we will simply use our own
% macros to access the page number of footnote text and decide whether to print
% it. \pagename is internationalized by latex-babel.
\def\spx@thefnmark#1#2{%
  % #1=label for reference, #2=page where footnote was printed
  \ifx\spx@tempa\spx@tempb
     % same page
     #1%
  \else
    \sphinxthefootnotemark{#1}{#2}%
  \fi
}%
\def\sphinxfootref@get #1#2#3#4#5\relax{%
    \def\sphinxfootref@label{#1}%
    \def\sphinxfootref@page {#2}%
    \def\sphinxfootref@Href {#4}%
}%
\protected\def\sphinxfootref#1{% #1 always explicit number in Sphinx usage
  \spx@opt@BeforeFootnote
  \ltx@ifundefined{r@\thesphinxscope.#1}%
    {\gdef\@thefnmark{?}\H@@footnotemark}%
    {\expandafter\expandafter\expandafter\sphinxfootref@get
                 \csname r@\thesphinxscope.#1\endcsname\relax
     \edef\spx@tempa{\thepage}\edef\spx@tempb{\sphinxfootref@page}%
     \protected@xdef\@thefnmark{\spx@thefnmark{\sphinxfootref@label}{\sphinxfootref@page}}%
     \let\spx@@makefnmark\@makefnmark
     \def\@makefnmark{%
       \hyper@linkstart{link}{\sphinxfootref@Href}%
       \spx@@makefnmark
       \hyper@linkend
     }%
     \H@@footnotemark
     \let\@makefnmark\spx@@makefnmark
    }%
}%
\AtBeginDocument{%
   % let hyperref less complain
   \pdfstringdefDisableCommands{\def\sphinxfootnotemark [#1]{}}%
   % to obtain hyperlinked footnotes in longtable environment we must replace
   % hyperref's patch of longtable's patch of \@footnotetext by our own
   \let\LT@p@ftntext\FNH@hyper@fntext
   % this *requires* longtable to be used always wrapped in savenotes environment
}%
\endinput
%%
%% End of file `sphinxpackagefootnote.sty'.