Usando mdframed para formatar entrada de índice

Question

Estou tentando usar um mdframepara formatar uma entrada de índice. Se eu descomentar \def\UseMdframeForFormatting{}no MWE abaixo (que tenta usar um mdframe), recebo o erro:

O uso de \@index não corresponde à sua definição

Código:

%\def\UseMdframeForFormatting{}%
\documentclass{article}
\usepackage{mdframed}
\usepackage{imakeidx}
\usepackage{xparse}
\usepackage{hyperref}
\usepackage{bookmark}

\newcommand*\lettergroup[1]{\subsection{#1}}

\newcommand*{\IndexWithName}[2]{%
    % #1 = word to index
    % #2 = index name
    \index[#2]{#1}%
}%

\newcommand*{\FormatIndexEntry}[1]{%
    \ifdefined\UseMdframeForFormatting% <--- If this is defined, things no longer work
        \begin{mdframed}[userdefinedwidth=0.5\linewidth]
            \textcolor{red}{#1}%
        \end{mdframed}%
    \else
        \textcolor{red}{#1}%
    \fi
}%


\NewDocumentCommand{\AddIndexEntry}{%
    O{}% #1 = index name
      m% #2 = word to index this under
      m% #3 = indexed term
}{%
    \expandafter\IndexWithName\expandafter{%
        #2!\FormatIndexEntry{#3}%
    }{#1}%
}
\newcommand{\indexopt}[2]{\index[#2]{#1}}

\makeindex[title={Main Index},columns=1,program=texindy]
\makeindex[title={Name Index},columns=1,program=texindy,name=Name]
\indexsetup{level=\section}

\begin{document}

%% This works fine here, but not above to format index entry
\begin{mdframed}[userdefinedwidth=0.5\linewidth]
    \textcolor{red}{foo}%
\end{mdframed}%

\AddIndexEntry[Name]{zero}{zero sum}

\clearpage 
\setcounter{secnumdepth}{0}
%\printindex
\printindex[Name]
\end{document}

Answer 1

Não com, mdframedmas com tcolorbox, isso está funcionando, se \begin{tcolorbox}for \protected. O estilo do tcolorboxdeve ser adaptado na \newtcolorboxverdade.

\def\UseMdframeForFormatting{}%
\documentclass{article}
\usepackage{mdframed}
\usepackage[most]{tcolorbox}

\usepackage{imakeidx}
\usepackage{xparse}
\usepackage{hyperref}
\usepackage{bookmark}

\newcommand*\lettergroup[1]{\subsection{#1}}

\newcommand*{\IndexWithName}[2]{%
  % #1 = word to index
  % #2 = index name
  \index[#2]{#1}%
}%

\makeatletter
\newcommand{\FormatIndexEntry}[1]{%
  \@ifundefined{UseMdframeForFormatting}{% <--- If this is defined, things no longer wor
    \textcolor{red}{#1}%
  }{%
    \protect\begin{tcolorbox}[colframe={gray},nobeforeafter,box align=center,sharp corners,width=0.5\linewidth]%
      \protect\textcolor{red}{#1}%
    \protect\end{tcolorbox}%
  }%
}%
\makeatother

\NewDocumentCommand{\AddIndexEntry}{%
    O{}% #1 = index name
      m% #2 = word to index this under
      m% #3 = indexed term
}{%
  \expandafter\IndexWithName\expandafter{%
    #2!\FormatIndexEntry{#3}%
  }{#1}%
}
\newcommand{\indexopt}[2]{\index[#2]{#1}}


\makeindex[title={Main Index},columns=1,program=texindy]
\makeindex[title={Name Index},columns=1,name=Name,program=texindy]
\indexsetup{level=\section}

\begin{document}

%% This works fine here, but not above to format index entry
\begin{mdframed}[userdefinedwidth=0.5\linewidth]\textcolor{red}{foo}\end{mdframed}%

\AddIndexEntry[Name]{zero}{zero sum}
%\index[Name]{zero}

\clearpage 
\setcounter{secnumdepth}{0}
%\printindex
\printindex[Name]
\end{document}

Atualizar

\documentclass{article}
\usepackage[most]{tcolorbox}

\usepackage{imakeidx}
\usepackage{xparse}
\usepackage{hyperref}
\usepackage{bookmark}


\def\UseMdframeForFormatting{}%

\newcommand*\lettergroup[1]{\subsection{#1}}

\newcommand*{\IndexWithName}[2]{%
  % #1 = word to index
  % #2 = index name
  \index[#2]{#1}%
}%

\newtcolorbox{indexentrybox}[1][]{%
  nobeforeafter,
  boxrule=0.5pt,
  boxsep=0pt,
  width=0.5\linewidth,
  box align=center,
  sharp corners,
  colframe={gray},
  coltext={red},
  colback=white,
  #1,
}%

\makeatletter
\newcommand{\FormatIndexEntry}[1]{%
  \@ifundefined{UseMdframeForFormatting}{% <--- If this is defined, things no longer wor
    \textcolor{red}{#1}%
  }{%
    \protect\begin{indexentrybox}
      #1%
      \protect\end{indexentrybox}
  }%
}%
\makeatother

\NewDocumentCommand{\AddIndexEntry}{%
    O{}% #1 = index name
      m% #2 = word to index this under
      m% #3 = indexed term
    }{%
      \expandafter\IndexWithName\expandafter{%
        #2!\FormatIndexEntry{#3}}{#1}%
    }
\newcommand{\indexopt}[2]{\index[#2]{#1}}


\makeindex[title={Main Index},columns=1,program=texindy]
\makeindex[title={Name Index},columns=1,name=Name,program=texindy]
\indexsetup{level=\section}

\begin{document}
Foo

\AddIndexEntry[Name]{zero}{zero sum}
\clearpage 
\setcounter{secnumdepth}{0}
%\printindex
\printindex[Name]

\end{document}