%% LaTeX package xassoccnt - version 1.6a (2018/06/10 -- 12:59:40)
%% Example file for determing the parent counter of a counter and referring to it file for xassoccnt.sty
%%
%%
%% -------------------------------------------------------------------------------------------
%% Copyright (c) 2017 -- 2018 by Dr. Christian Hupfer <typography dot with dot latex at gmail dot com>
%% -------------------------------------------------------------------------------------------
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%% 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.
%%
%%
%% This work has the LPPL maintenance status `author-maintained`
%%
%%


% Source was a question on TeX.SE by user gigabytes: http://tex.stackexchange.com/questions/353491/how-to-show-also-the-name-of-the-parent-counter-with-cleveref
% The provided answer by Christian Hupfer did not use xassoccnt but the features were incorporated in the package. 

\documentclass{book}
\usepackage{lipsum}
\usepackage{xassoccnt}
\usepackage{xpatch}
\usepackage{hyperref}
\usepackage[user,counter,hyperref]{zref}
\usepackage{cleveref}

\makeatletter
\AtEndPreamble{
  \newif\if@hyperrefloaded

\@ifpackageloaded{hyperref}{%
  \@hyperrefloadedtrue
}{
  \@hyperrefloadedfalse
}
}
\makeatother

\usepackage{xparse}



\makeatletter

\ExplSyntaxOn
\prop_new:N \g_latex_parentcounters_prop 
\seq_new:N  \g_latex_counters_seq

\cs_generate_variant:Nn \str_head:n {x,o,V}
\cs_generate_variant:Nn \str_tail:n {x,o,V}
\cs_generate_variant:Nn \str_upper_case:n {x,o,V}
\cs_generate_variant:Nn \str_set:Nn {Nx,No}

% Store all reset lists and make a property list for each counter and its possible parent counter

% Make the first character of a word upper case
\newcommand{\FirstUpcase}[1]{%
  \str_set:Nx \l_tmpa_str {#1}%
  \str_upper_case:x {\str_head:N \l_tmpa_str}\str_tail:V {\l_tmpa_str}%
}

\ExplSyntaxOff




% Define new properties
\zref@newprop{childcountervalue}{\arabic{\LastRefSteppedCounter}}% This is the naked value
\zref@newprop{parentcountervalue}{\csname the\GetParentCounter{\LastRefSteppedCounter}\endcsname}
\zref@newprop{parentcountername}{\GetParentCounter{\LastRefSteppedCounter}}

% Add the new properties to the main property list stored with \zlabel
\zref@addprops{main}{childcountervalue,parentcountervalue,parentcountername}

% Command for uppercase output
\NewDocumentCommand{\parentCref}{m}{%
  \zref@ifrefundefined{#1}{%
    \Cref{#1}%
  }{%
    \edef\@tmpb@{\zref@extract{#1}{parentcountervalue}}%
    \edef\@tmpa@{\csname the\zref@extract{#1}{parentcountername}\endcsname}%
    \ifx\@tmpb@\@tmpa@
    \Cref{#1}%
    \else
    \if@hyperrefloaded
    \FirstUpcase{\zref@extract{#1}{counter}} \hyperlink{\zref@extract{#1}{anchor}}{\zref@extract{#1}{childcountervalue}} of \FirstUpcase{\zref@extract{#1}{parentcountername}} \hyperlink{\zref@extract{#1}{anchor}}{\zref@extract{#1}{parentcountervalue}}%
    \else
    \FirstUpcase{\zref@extract{#1}{counter}} \zref@extract{#1}{childcountervalue} of \FirstUpcase{\zref@extract{#1}{parentcountername}} \zref@extract{#1}{parentcountervalue}%
    \fi
    \fi
  }%
}

% Command for lowercase output
\NewDocumentCommand{\parentcref}{m}{%
  \zref@ifrefundefined{#1}{%
    \cref{#1}%
  }{%
    \edef\@tmpb@{\zref@extract{#1}{parentcountervalue}}%
    \edef\@tmpa@{\csname the\zref@extract{#1}{parentcountername}\endcsname}%
    \ifx\@tmpb@\@tmpa@
    \Cref{#1}%
    \else
    \if@hyperrefloaded
    \zref@extract{#1}{counter} \hyperlink{\zref@extract{#1}{anchor}}{\zref@extract{#1}{childcountervalue}} of \zref@extract{#1}{parentcountername} \hyperlink{\zref@extract{#1}{anchor}}{\zref@extract{#1}{parentcountervalue}}%
    \else
    \zref@extract{#1}{counter} \zref@extract{#1}{childcountervalue} of \zref@extract{#1}{parentcountername} \zref@extract{#1}{parentcountervalue}%
    \fi
    \fi
  }%
}

\makeatother


\GetAllResetLists
\RegisterPostLabelHook{\zlabel}



\begin{document}
\chapter{Chapter One}
  Please look at \parentCref{othersection} or at \parentCref{foosubsection} or at \parentcref{foosubsection}


  \section{Section One.One}
  \label{mysection}
  \lipsum

  \section{Section One.Two}

  \subsection{A subsection} \label{foosubsection}
  Please ignore \parentCref{mysection}.
  
  \chapter{Chapter Two}
  \section{Section Two.One}

  As you may have noticed, \parentCref{mysection} is useless.
  

  \chapter{Chapter Three}
  \section{Section Three.One}   %
  \section{Section Three.Two}\label{othersection}

\end{document}

