%%
%% This is file `oxyear.bbx',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% oxref.dtx  (with options: `bbx,y')
%% ----------------------------------------------------------------
%% biblatex-oxref --- Biblatex styles inspired by the Oxford Guide to Style
%% Author:  Alex Ball
%% E-mail:  a.j.ball@bath.ac.uk
%% License: Released under the LaTeX Project Public License v1.3c or later
%% See:     http://www.latex-project.org/lppl.txt
%% ----------------------------------------------------------------
%% 
\def\Version{2019/09/20 v2.0}
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\ProvidesFile{oxyear.bbx}
    [\Version\space Author-year bibliography style inspired by the Oxford Guide to Style]
\RequireBibliographyStyle{oxref}
\ExecuteBibliographyOptions{giveninits,labeldateparts,sorting=nyt,pagetracker,maxcitenames=2}
\DeclareBiblatexOption{global,type,entry}{mergedate}[true]{%
  \ifcsdef{bbx@opt@mergedate@#1}
    {\csuse{bbx@opt@mergedate@#1}}
    {\PackageError{biblatex-oxref}
       {Invalid option 'mergedate=#1'}
       {Valid values are 'maximum', 'compact', 'basic', 'minimum',\MessageBreak
        'year', 'true' (=year), and 'false'.}}}
\providebibmacro*{date+extradate}{}
\DeclareFieldFormat{datelabel}{\mkbibparens{#1}}
\DeclareFieldFormat{labeldate}{%
  \iflabeldateisdate{%
    \def\currentfield{date}%
  }{%
    \iflabeldateisanydate{%
      \def\currentfield{\thefield{labeldatesource}date}%
    }{%
      \def\currentfield{\thefield{labeldatesource}}}}%
  \iffieldannotation{inferred}{\mkbibbrackets{#1}}{#1}%
  \undef\currentfield}
\DeclareLabeldate{%
  \field{origdate}
  \field{date}
  \field{year}
  \field{eventdate}
  \field{pubstate}
  \literal{nodate}
}
\DeclareFieldFormat{extradate}{%
  \iffieldundef{\thefield{labeldatesource}}{%
    \iffieldnums{\thefield{labeldatesource}year}{}{~}%
  }{%
    \iffieldnums{\thefield{labeldatesource}}{}{~}%
  }%
  \mkbibemph{\mknumalph{#1}}}%

\def\iflabeldateisanydate{%
  \ifboolexpr{%
    togl {blx@labeldateparts}
    and not test {\iffieldundef{labeldatesource}}
    and (
      test {\iffieldequalstr{labeldatesource}{year}}
      or not test {\iffieldundef{\thefield{labeldatesource}year}}
    )}}
\def\iflabeldateispubstate{%
  \ifboolexpr{%
    not test {\iffieldundef{labeldatesource}}
    and test {\iffieldequalstr{labeldatesource}{pubstate}}}}
\newtoggle{blx@ox@nonodate}
\DeclareBibliographyOption{nonodate}[true]{%
  \settoggle{blx@ox@nonodate}{#1}}
\DeclareTypeOption{nonodate}[true]{%
  \settoggle{blx@ox@nonodate}{#1}}
\DeclareEntryOption{nonodate}[true]{%
  \settoggle{blx@ox@nonodate}{#1}}
\newbibmacro*{labeldate}{%
  \ifboolexpr{
    test {\iffieldequalstr{labeldatesource}{nodate}}
    and
    togl {blx@ox@nonodate}
  }{}{\printtext[datelabel]{\printlabeldateextra}}}

\def\bbx@opt@mergedate@true{\bbx@opt@mergedate@year}
\def\bbx@opt@mergedate@maximum{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \iflabeldateisdate{%
        \printtext[datelabel]{%
          \printfield{issue}\clearfield{issue}%
          \setunit*{\addspace}%
          \printdateextra}%
        \clearfield{year}\clearfield{season}\clearfield{month}\clearfield{day}%
      }{%
        \iflabeldateisanydate{%
          \printtext[datelabel]{%
            \csuse{print\thefield{labeldatesource}dateextra}}%
          \clearfield{\thefield{labeldatesource}year}%
          \clearfield{\thefield{labeldatesource}season}%
          \clearfield{\thefield{labeldatesource}month}%
          \clearfield{\thefield{labeldatesource}day}%
        }{%
          \usebibmacro{labeldate}%
          \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}}}}}}
\def\bbx@opt@mergedate@compact{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \iflabeldateisdate{%
        \printtext[datelabel]{\printdateextra}%
        \clearfield{year}\clearfield{season}\clearfield{month}\clearfield{day}%
      }{%
        \iflabeldateisanydate{%
          \printtext[datelabel]{%
            \csuse{print\thefield{labeldatesource}dateextra}}%
          \clearfield{\thefield{labeldatesource}year}%
          \clearfield{\thefield{labeldatesource}season}%
          \clearfield{\thefield{labeldatesource}month}%
          \clearfield{\thefield{labeldatesource}day}%
        }{%
          \usebibmacro{labeldate}%
          \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}}}}}}
\def\bbx@opt@mergedate@year{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \usebibmacro{labeldate}%
      \iflabeldateisdate{%
        \clearfield{year}
      }{%
        \iflabeldateisanydate{%
          \clearfield{\thefield{labeldatesource}year}%
        }{%
          \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}%
        }}}}}
\def\bbx@opt@mergedate@basic{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \usebibmacro{labeldate}%
      \iflabeldateisdate{%
        \ifboolexpr{
          test {\ifdateshavedifferentprecision{label}{}}
          or
          not test {\iffieldundef{issue}}
        }{}{%
          \clearfield{year}}%
      }{%
        \iflabeldateisanydate{%
          \ifdateshavedifferentprecision{label}{\thefield{labeldatesource}}{}{%
            \clearfield{\thefield{labeldatesource}year}}%
        }{%
          \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}%
        }}}}}
\def\bbx@opt@mergedate@minimum{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \usebibmacro{labeldate}%
      \iflabeldateisdate{%
        \ifboolexpr{
          test {\ifdateshavedifferentprecision{label}{}}
          or
          not test {\iffieldundef{extradate}}
          or
          not test {\iffieldundef{issue}}
        }{}{%
          \clearfield{year}}%
      }{%
        \iflabeldateisanydate{%
          \ifboolexpr{
            test {\ifdateshavedifferentprecision{label}{\thefield{labeldatesource}}}
            or
            not test {\iffieldundef{extradate}}
          }{}{%
            \clearfield{\thefield{labeldatesource}year}}%
        }{%
          \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}%
        }}}}}
\def\bbx@opt@mergedate@false{%
  \renewbibmacro*{date+extradate}{%
    \iffieldundef{labelyear}{}{%
      \usebibmacro{labeldate}%
      \iflabeldateisanydate{}{%
        \iflabeldateispubstate{}{\clearfield{\thefield{labeldatesource}}}%
      }}}}
\ExecuteBibliographyOptions{mergedate}
\newrobustcmd*{\mknoyeardaterangefull}[2]{%
  \iffieldundef{#2month}{}{%
    \datecircaprint
    \printtext[#2date]{%
    \iffieldundef{#2season}{%
      \csuse{mkbibdate#1}{}{#2month}{#2day}%
      \blx@printtime{#2}{}%
    }{%
      \csuse{mkbibseasondate#1}{}{#2season}}%
    \dateuncertainprint
    \iffieldundef{#2endmonth}{}{%
      \iffieldequalstr{#2endmonth}{}{%
        \mbox{\bibdaterangesep}%
      }{%
        \bibdaterangesep
        \enddatecircaprint
        \iffieldundef{#2season}{%
          \csuse{mkbibdate#1}{}{#2endmonth}{#2endday}%
          \blx@printtime{#2}{end}%
        }{%
          \csuse{mkbibseasondate#1}{}{#2endseason}}%
        \enddateuncertainprint}}}}}
\newrobustcmd*{\mknoyeardaterangetrunc}[2]{%
  \iffieldundef{#2month}{}{%
    \datecircaprint
    \printtext[#2date]{%
      \iffieldundef{#2season}{%
        \ifboolexpr{
          test {\iffieldsequal{labelyear}{labelendyear}}
          and
          test {\iffieldsequal{#2month}{#2endmonth}}
        }{%
          \csuse{mkbibdate#1}{}{}{#2day}%
        }{%
          \csuse{mkbibdate#1}{}{#2month}{#2day}}%
      }{%
        \csuse{mkbibseasondate#1}{}{#2season}}%
      \dateuncertainprint
      \iffieldundef{#2endmonth}{}{%
        \iffieldequalstr{#2endmonth}{}{%
          \mbox{\bibdaterangesep}%
        }{%
          \bibdaterangesep
          \enddatecircaprint
          \iffieldundef{#2season}{%
            \csuse{mkbibdate#1}{}{#2endmonth}{#2endday}%
          }{%
            \csuse{mkbibseasondate#1}{}{#2endseason}}%
          \enddateuncertainprint}}}}}
\xpatchcmd{\mkdaterangefull}{%
  \iffieldundef{#2year} {\blx@nounit}%
}{%
  \iffieldundef{#2year} {\mknoyeardaterangefull{#1}{#2}}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch mkdaterangefull}}
\xpatchcmd{\mkdaterangetrunc@i}{%
  \iffieldundef{#2year} {\blx@nounit}%
}{%
  \iffieldundef{#2year} {\mknoyeardaterangetrunc{#1}{#2}}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch mkdaterangetrunc@i}}
\xpatchcmd{\mkdaterangefullextra}{%
  \iffieldundef{#2year} {\blx@nounit}%
}{%
  \iffieldundef{#2year} {\mknoyeardaterangefull{#1}{#2}}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch mkdaterangefullextra}}
\xpatchcmd{\mkdaterangetruncextra@i}{%
  \iffieldundef{#2year} {\blx@nounit}%
}{%
  \iffieldundef{#2year} {\mknoyeardaterangetrunc{#1}{#2}}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch mkdaterangetruncextra@i}}

\DeclareFieldFormat{shorthandwidth}{#1}
\xpretonameformat{family-given}{%
  \iffieldannotation{inferred}{\ifnumequal{\value{listcount}}{1}{\bibopenbracket}{}}{}%
  \ifitemannotation{inferred}{\bibopenbracket}{}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to prepend to family-given}}
\xpatchnameformat{family-given}{%
  \usebibmacro{name:andothers}%
}{%
  \ifitemannotation{pseudo}{%
    \addspace\printtext[parens]{\bibsstring{pseudo}}%
  }{}%
  \ifitemannotation{inferred}{\bibclosebracket}{}%
  \usebibmacro{name:andothers}%
  \iffieldannotation{inferred}{%
    \ifboolexpr{
      test {\ifnumequal{\value{listcount}}{\value{maxnames}}}
      or
      test {\ifnumequal{\value{listcount}}{\value{listtotal}}}
      or (
        test {\ifnumequal{\value{listcount}}{\value{minnames}}}
        and
        test {\ifnumgreater{\value{listtotal}}{\value{maxnames}}} )
    }{\bibclosebracket}{}%
  }{}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch family-given}}
\DeclareNameAlias{shortauthor}{family-given}
\DeclareNameAlias{shorteditor}{family-given}
\DeclareNameAlias{sortname}{family-given}
\DeclareNameAlias{author}{family-given}
\DeclareNameAlias{editor}{family-given}
\DeclareNameAlias{translator}{family-given}
\defbibenvironment{bibliography}
  {\list
     {}
     {\setlength{\leftmargin}{\bibhang}%
      \setlength{\itemindent}{-\leftmargin}%
      \setlength{\itemsep}{\bibitemsep}%
      \setlength{\parsep}{\bibparsep}}}
  {\endlist}
  {\item}
\defbibenvironment{shorthand}
  {\list
     {\printfield[shorthandwidth]{shorthand}}
     {\setlength{\labelwidth}{\shorthandwidth}%
      \setlength{\leftmargin}{\labelwidth}%
      \setlength{\labelsep}{\biblabelsep}%
      \addtolength{\leftmargin}{\labelsep}%
      \setlength{\itemsep}{\bibitemsep}%
      \setlength{\parsep}{\bibparsep}%
      \renewcommand*{\makelabel}[1]{##1\hss}}}
  {\endlist}
  {\item}
\InitializeBibliographyStyle{\global\undef\bbx@lasthash}
\xapptobibmacro{begrelated}{%
  \booltrue{bbx@inset}}%
{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to append to begrelated}}
\xapptobibmacro{endrelated}{%
  \usebibmacro*{bbx:savehash}}%
{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to append to endrelated}}
\xpatchbibmacro{author}{%
  \iffieldundef{authortype}%
}{%
  \usebibmacro{date+extradate}%
  \setunit*{\addspace}%
  \iffieldundef{authortype}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch author (authortype)}}%
\xpatchbibmacro{author}{%
  \global\undef\bbx@lasthash
}{%
  \global\undef\bbx@lasthash
  \usebibmacro{labeltitle}%
  \setunit*{\addspace}%
  \usebibmacro{date+extradate}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch author (lasthash)}}%
\xpatchbibmacro{namepairs}{%
  \printnames[by#1]%
}{%
  \printnames[#1]%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch namepairs}}
\xpatchbibmacro{author+altauthor}{%
  \printnames{author}%
}{%
  \ifboolexpr{%
    ( not test {\ifnameundef{shortauthor}} )
    and
    test {\ifnumequal{\value{shortauthor}}{\value{author}}}
  }{%
    \usebibmacro{namepairs}{author}{shortauthor}%
  }{%
    \printnames{author}%
  }%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch author+altauthor}}%
\xpatchbibmacro{bbx:editor}{%
  \usebibmacro{#1}%
}{%
  \usebibmacro{date+extradate}%
  \setunit*{\addspace}%
  \usebibmacro{#1}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch bbx:editor}}%
\xpatchbibmacro{bbx:editor}{%
  \global\undef\bbx@lasthash
}{%
  \global\undef\bbx@lasthash
  \usebibmacro{labeltitle}%
  \setunit*{\addspace}%
  \usebibmacro{date+extradate}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch bbx:editor (lasthash)}}%
\xpatchbibmacro{editor+alteditor}{%
  \printnames[byeditor]%
}{%
  \printnames[editor]%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch editor+alteditor}}
\xpatchbibmacro{editor+alteditor}{%
  \printnames{editor}%
}{%
  \ifboolexpr{%
    ( not test {\ifnameundef{shorteditor}} )
    and
    test {\ifnumequal{\value{shorteditor}}{\value{editor}}}
  }{%
    \usebibmacro{namepairs}{editor}{shorteditor}%
  }{%
    \printnames{editor}%
  }%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch editor+alteditor (shorteditor)}}%
\xpatchbibmacro{bbx:translator}{%
  \global\undef\bbx@lasthash
}{%
  \global\undef\bbx@lasthash
  \usebibmacro{labeltitle}%
  \setunit*{\addspace}%
  \usebibmacro{date+extradate}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch bbx:translator (lasthash)}}%
\xpatchbibmacro{bbx:translator}{%
  \usebibmacro{#1}%
}{%
  \usebibmacro{date+extradate}%
  \setunit*{\addspace}%
  \usebibmacro{#1}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch bbx:translator}}%
\newtoggle{blx@ox@clearedtitle}
\newbibmacro*{labeltitle}{%
  \iffieldundef{label}{%
    \iffieldundef{shorttitle}{%
      \ifboolexpr{
        test {\iffieldundef{title}}
        and
        test {\iffieldundef{subtitle}}
      }{%
        \printfield{library}%
        \clearfield{library}%
      }{%
        \printtext[title]{%
          \printfield[titlecase]{title}%
          \setunit{\subtitlepunct}%
          \printfield[titlecase]{subtitle}}%
        \clearfield{title}%
        \clearfield{subtitle}%
        \toggletrue{blx@ox@clearedtitle}%
        \setunit{\addspace}%
      }%
    }{%
      \printtext[title]{\printfield[titlecase]{shorttitle}}%
    }%
  }{%
    \printfield{label}%
  }%
}
\xpretobibmacro{maintitle+title}{%
  \iftoggle{blx@ox@clearedtitle}{%
    \usebibmacro{maintitle+volume}%
    \clearfield{maintitle}%
    \clearfield{volume}%
  }{}%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to prepend to maintitle+title}}
\DeclareFieldFormat[mvbook,mvcollection,mvreference,proceedings,mvproceedings]{maintitle+volume}{#1}
\xpatchbibdriver{online}{%
  \iffieldundef{year}%
}{%
  \ifboolexpr{
    test {\iffieldundef{season}}
    and
    test {\iffieldundef{month}}
  }%
}{}{\wlog{WARNING: biblatex-oxref (oxyear) failed to patch online}}
\DeclareFieldFormat[bookinbook]{citetitle}{%
  \ifboolexpr{
    test {\iffieldequalstr{entrysubtype}{poem}}
    or
    test {\iffieldequalstr{entrysubtype}{play}}
  }{%
    \mkbibemph{#1}%
  }{%
    \mkbibquote{#1\isdot}}}
\DeclareFieldFormat[suppperiodical,inaudio,inmusic,inmovie,invideo,online,%
    image,manuscript,unpublished]{citetitle}{%
  \def\currentfield{title}%
  \ifboolexpr{
    test {\iffieldannotation{descriptor}}
    or (
      test {\iffieldundef{shorttitle}}
      and
      test {\iffieldundef{title}}
    )
  }{#1}{\mkbibquote{#1\isdot}}%
  \undef\currentfield}
\DeclareFieldFormat[suppperiodical,inaudio,inmusic,inmovie,invideo,online,%
    image,manuscript,unpublished]{citetitle}{%
  \def\currentfield{title}%
  \ifboolexpr{
    test {\iffieldannotation{descriptor}}
    or (
      test {\iffieldundef{shorttitle}}
      and
      test {\iffieldundef{title}}
    )
  }{#1}{\mkbibquote{#1\isdot}}%
  \undef\currentfield}
\DeclareFieldFormat[audio,music]{citetitle}{%
  \def\currentfield{title}%
  \ifboolexpr{
    test {\iffieldannotation{descriptor}}
    or (
      test {\iffieldundef{shorttitle}}
      and
      test {\iffieldundef{title}}
    )
  }{#1}{%
    \iffieldequalstr{entrysubtype}{podcast}{%
      \mkbibquote{#1\isdot}%
    }{%
      \mkbibemph{#1}}}%
  \undef\currentfield}
\DeclareFieldFormat[movie,video]{citetitle}{%
  \def\currentfield{title}%
  \ifboolexpr{
    test {\iffieldannotation{descriptor}}
    or (
      test {\iffieldundef{shorttitle}}
      and
      test {\iffieldundef{title}}
    )
  }{#1}{%
    \ifboolexpr{
      test {\iffieldequalstr{entrysubtype}{episode}}
      or
      test {\iffieldequalstr{entrysubtype}{clip}}
      or
      test {\iffieldequalstr{entrysubtype}{webcast}}
    }{%
      \mkbibquote{#1\isdot}%
    }{%
      \mkbibemph{#1}}}%
  \undef\currentfield}
\DeclareFieldFormat[legislation,legal]{citetitle}{#1}
\DeclareFieldFormat[misc]%
    {citetitle}{%
  \def\currentfield{title}%
  \ifboolexpr{
    test {\iffieldannotation{descriptor}}
    or (
      test {\iffieldundef{shorttitle}}
      and
      test {\iffieldundef{title}}
    )
  }{#1}{%
    \iffieldequalstr{relatedtype}{in}{%
      \mkbibquote{#1\isdot}%
    }{%
      \mkbibemph{#1}%
    }}%
  \undef\currentfield}

\renewcommand*{\bibpagespunct}{%
  \ifboolexpr{
    test {\ifentrytype{article}}
    or
    test {\ifentrytype{suppperiodical}}
    or
    test {\ifentrytype{review}}
  }{%
    \addcolon\space
  }{%
    \addcomma\space
  }%
}
\renewbibmacro{manuscript:date}{%
  \ifboolexpr{
    test {\ifnameundef{author}}
    and
    not togl {blx@ox@clearedtitle}
    and
    test {\iffieldundef{label}}
  }{}{\usebibmacro{date}}}
\DeclareLabeltitle{%
  \field{shorttitle}
  \field{title}
  \field{maintitle}
  \field{library}
}
\DeclareStyleSourcemap{%
  \maps[datatype=bibtex]{%
    \map[overwrite=true]{
      \step[notmatch=\regexp{nonodate}, fieldsource=options, final]
      \step[fieldsource=sortyear, final]
      \step[fieldset=options, append, fieldvalue={,nonodate}]
    }
    \map[overwrite=true]{
      \step[notfield=options, final]
      \step[fieldsource=sortyear, final]
      \step[fieldset=options, fieldvalue={nonodate}]
    }
    \map[overwrite=false]{
      \pertype{standard}
      \step[notfield=author,
            fieldsource=number,
            fieldtarget=label]
    }
}}

%% 
%% Copyright (C) 2016–2019 Alex Ball
%%
%% End of file `oxyear.bbx'.