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%% LaTeX package xassoccnt - version 1.7 (2018/12/28 -- 06:45:16)
%% 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}
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