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%
% wtref.sty
%

%%%% package declaration
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{wtref}[2016/08/09 v0.3.1]
\def\wtrf@pkgname{WTRef}
\RequirePackage{xkeyval}

%%%% error messages
\def\wtrf@info{\PackageInfo\wtrf@pkgname}
\def\wtrf@error{\PackageError\wtrf@pkgname}

%%%% new ifs and new counts
\newif\if@wtrf@use@scope@
\newif\if@wtrf@use@namespace@
\newif\if@wtrf@set@namespace@
\newcount\wtrf@tempcnta
\newcount\wtrf@tempcntb

%%%% utility
\def\wtrf@name@def#1{\expandafter\def\csname #1\endcsname}
\def\wtrf@name@edef#1{\expandafter\edef\csname #1\endcsname}
\def\wtrf@name@use#1{\csname #1\endcsname}
\def\wtrf@if@option@exist{\@ifnextchar[}
\def\wtrf@if@reftype@not@exist#1{\@ifundefined{wtrf@#1@namespace}}

%%%% check commands
\def\wtrf@check@counter#1{%
  \@ifundefined{c@#1}
    {\wtrf@error{Undefined LaTeX counter '#1'}}
    {}}
\def\wtrf@check@command#1{%
  \@ifundefined{#1}
    {}
    {\wtrf@info{Redefining \expandafter\string\csname#1\endcsname}}}

%%%% trimming spaces
\define@cmdkeys[wtrf]{ts}[wtrf@temp@]{ref@name, label}
\def\wtrf@set@ref@name#1{\setkeys[wtrf]{ts}{ref@name=#1}}
\def\wtrf@set@label#1{\setkeys[wtrf]{ts}{label=#1}}

%%%% define keys for new ref
\define@key[wtrf]{ns}{namespace}{%
  \@wtrf@set@namespace@true
  \def\wtrf@namespace@temp{#1}}
\define@key[wtrf]{ns}{nonamespace}[\@empty]{%
  \@wtrf@use@namespace@false}
\define@key[wtrf]{ns}{scope}{%
  \wtrf@check@counter{#1}%
  \@wtrf@use@scope@true
  \def\wtrf@scope@temp{#1}}

%%%% new ref
\newcommand{\newref}{%
  \let\wtrf@namespace@temp\@empty
  \@wtrf@use@namespace@true
  \@wtrf@set@namespace@false
  \@wtrf@use@scope@false
  \wtrf@if@option@exist
    {\wtrf@set@namespace}
    {\wtrf@@newref}}
\@onlypreamble\newref
\def\wtrf@set@namespace[#1]{%
  \setkeys[wtrf]{ns}{#1}%
  \wtrf@@newref}
\def\wtrf@@newref#1{%
  \@for\wtrf@member:=#1\do{%
    \expandafter\wtrf@set@ref@name\expandafter{\wtrf@member}%
    \expandafter\wtrf@newref@pre\expandafter{\wtrf@temp@ref@name}}}
\def\wtrf@newref@pre#1{%
  \wtrf@if@reftype@not@exist{#1}%
    {\wtrf@newref{#1}}
    {\wtrf@error{ref type '#1' already exists}}}
\def\wtrf@newref#1{%
  % define namespace
  \if@wtrf@use@namespace@
    \ifx\wtrf@namespace@temp\@empty
      \@wtrf@set@namespace@false
      \def\wtrf@namespace@temp{#1}%
    \fi
    \wtrf@name@edef{wtrf@#1@namespace}{\wtrf@namespace@temp:}%
  \else
    \wtrf@name@def{wtrf@#1@namespace}{}%
  \fi
  % define scope
  \if@wtrf@use@scope@
    \wtrf@name@edef{wtrf@#1@scope@cmd}{the\wtrf@scope@temp}%
    \wtrf@name@def{wtrf@#1@scope}{\csname\wtrf@name@use{wtrf@#1@scope@cmd}\endcsname:}%
  \else
    \wtrf@name@def{wtrf@#1@scope}{}%
  \fi
  % define keys for setting styles
  \define@key[wtrf]{#1@style}{refcmd}{\wtrf@name@def{wtrf@#1@refcmd}####1{##1}}%
  \define@key[wtrf]{#1@style}{last sep}[\wtrf@name@use{wtrf@#1@sep}]{%
    \wtrf@name@def{wtrf@#1@last@sep}{##1}}%
  \define@cmdkeys[wtrf]{#1@style}[wtrf@#1@]{sep, prefix, suffix}%
  % default key settings
  \setkeys[wtrf]{#1@style}{%
    refcmd=\ref{##1},
    sep={,\space}, last sep,
    prefix={}, suffix={}}%
  % define label command
  \wtrf@check@command{#1label}%
  \wtrf@name@def{#1label}{\protect\wtrf@name@use{wtrf@#1label}}
  \wtrf@name@def{wtrf@#1label}##1{%
    \label{\wtrf@name@use{wtrf@#1@namespace}\wtrf@name@use{wtrf@#1@scope}##1}}%
  % define ref command
  \wtrf@check@command{#1ref}%
  \wtrf@name@def{#1ref}{\protect\wtrf@name@use{wtrf@#1ref}}
  \wtrf@name@def{wtrf@#1ref}{%
    \wtrf@if@option@exist
      {\wtrf@name@use{wtrf@#1ref@with@option}}
      {\def\wtrf@scope{\wtrf@name@use{wtrf@#1@scope}}\wtrf@name@use{wtrf@#1@print}}}%
  % when option exist
  \if@wtrf@use@scope@
    \wtrf@name@def{wtrf@#1ref@with@option}[##1]##2{%
      \def\wtrf@scope{##1:}%
      \wtrf@name@use{wtrf@#1@print}{##2}}%
  \else
    \wtrf@name@def{wtrf@#1ref@with@option}[##1]##2{%
      \let\wtrf@scope\@empty
      \wtrf@name@use{wtrf@#1@print}{##2}}%
  \fi
  % print refs
  \wtrf@name@def{wtrf@#1@print}##1{%
    \wtrf@tempcnta\z@
    \@for\wtrf@member:=##1\do{\advance\wtrf@tempcnta\@ne}%
    \ifnum\wtrf@tempcnta<\tw@
      \wtrf@name@use{wtrf@#1@prefix}%
      \wtrf@name@use{wtrf@#1@refcmd}{%
        \wtrf@name@use{wtrf@#1@namespace}\wtrf@scope##1}%
      \wtrf@name@use{wtrf@#1@suffix}%
    \else
      \wtrf@tempcntb\@ne
      \advance\wtrf@tempcnta\m@ne
      \wtrf@name@use{wtrf@#1@prefix}%
      \@for\wtrf@member:=##1\do{%
        \expandafter\wtrf@set@label\expandafter{\wtrf@member}%
        \wtrf@name@use{wtrf@#1@refcmd}{%
          \wtrf@name@use{wtrf@#1@namespace}\wtrf@scope\wtrf@temp@label}%
        \ifnum\wtrf@tempcnta>\wtrf@tempcntb
          \wtrf@name@use{wtrf@#1@sep}%
        \else\ifnum\wtrf@tempcnta=\wtrf@tempcntb
          \wtrf@name@use{wtrf@#1@last@sep}%
        \fi\fi
        \advance\wtrf@tempcntb\@ne}%
      \wtrf@name@use{wtrf@#1@suffix}%
    \fi}%
  % reset \wtrf@namespace@temp
  \if@wtrf@set@namespace@\else
    \let\wtrf@namespace@temp\@empty
  \fi}

%%%% set ref style
\newcommand{\setrefstyle}[2]{%
  \@for\wtrf@member:=#1\do{%
    \expandafter\wtrf@set@ref@name\expandafter{\wtrf@member}%
    \expandafter\wtrf@setrefstyle\expandafter{\wtrf@temp@ref@name}{#2}}}
\def\wtrf@setrefstyle#1#2{%
  \wtrf@if@reftype@not@exist{#1}%
    {\wtrf@error{ref type '#1' does not exist}}
    {\setkeys[wtrf]{#1@style}{#2}}}

%% EOF