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\ProvidesFile{ext-authoryear-comp.cbx}
  [2018/03/28 v0.2 extended biblatex authoryear-comp
   citation style (MW)]

\blx@inputonce{ext-biblatex-aux.def}{auxiliary code for ext-biblatex}{}{}{}{}

\RequireCitationStyle{authoryear-comp}

\DeclareOuterCiteDelim{parencite}{\bibopenparen}{\bibcloseparen}

\DeclareInnerCiteDelim{textcite}{\bibopenparen}{\bibcloseparen}

\DeclareFieldFormat{citelabeldate}{#1}
\DeclareFieldFormat{parencitelabeldate}{#1}
\DeclareFieldFormat{textcitelabeldate}{#1}
\DeclareFieldFormat{footcitelabeldate}{#1}

\newcommand*{\extradateonlycompcitedelim}{\addcomma}

\renewbibmacro*{cite}{%
  \iffieldundef{shorthand}
    {\ifboolexpr{test {\ifnameundef{labelname}}
                 or test {\iffieldundef{labelyear}}}
       {\usebibmacro{cite:label}%
        \setunit{%
          \global\booltrue{cbx:parens}%
          \printdelim{nonameyeardelim}%
          \csuse{extblx@citedelim@\blx@delimcontext @inner@open}}%
        \usebibmacro{cite:labeldate+extradate}%
        \usebibmacro{cite:reinit}}
       {\iffieldequals{namehash}{\cbx@lasthash}
          {\ifboolexpr{test {\iffieldequals{labelyear}{\cbx@lastyear}}
                       and (test {\ifnumequal{\value{multicitecount}}{0}}
                            or test {\iffieldundef{postnote}})}
             {\setunit{\extradateonlycompcitedelim}%
              \usebibmacro{cite:extradate}}
             {\setunit{\compcitedelim}%
              \usebibmacro{cite:labeldate+extradate}%
              \savefield{labelyear}{\cbx@lastyear}}}
          {\printnames{labelname}%
           \setunit{%
             \global\booltrue{cbx:parens}%
             \printdelim{nameyeardelim}%
             \csuse{extblx@citedelim@\blx@delimcontext @inner@open}}%
           \usebibmacro{cite:labeldate+extradate}%
           \savefield{namehash}{\cbx@lasthash}%
           \savefield{labelyear}{\cbx@lastyear}}}}
    {\usebibmacro{cite:shorthand}%
     \usebibmacro{cite:reinit}}%
  \setunit{%
    \ifbool{cbx:parens}
      {\csuse{extblx@citedelim@\blx@delimcontext @inner@close}%
       \global\boolfalse{cbx:parens}}
      {}%
    \multicitedelim}}

\renewbibmacro*{cite:labeldate+extradate}{%
  \iffieldundef{labelyear}
    {}
    {\printtext[bibhyperref]{%
       \printtext[\blx@delimcontext labeldate]{%
         \printlabeldateextra}}}}

\renewbibmacro*{cite:extradate}{%
  \iffieldundef{extradate}
    {}
    {\printtext[bibhyperref]{%
       \printtext[\blx@delimcontext labeldate]{%
         \printfield{extradate}}}}}

\newbibmacro*{cite:postnote}{%
  \setunit{}%
  \printtext{%
    \ifbool{cbx:parens}
      {\csuse{extblx@citedelim@\blx@delimcontext @inner@close}%
       \global\boolfalse{cbx:parens}}
      {}}%
  \usebibmacro{postnote}}

\renewbibmacro*{textcite}{%
  \iffieldequals{namehash}{\cbx@lasthash}
    {\iffieldundef{shorthand}
       {\ifboolexpr{test {\iffieldequals{labelyear}{\cbx@lastyear}}
                    and (test {\ifnumequal{\value{multicitecount}}{0}}
                         or test {\iffieldundef{postnote}})}
          {\setunit{\extradateonlycompcitedelim}%
           \usebibmacro{cite:extradate}}
          {\setunit{\compcitedelim}%
           \usebibmacro{cite:labeldate+extradate}%
           \savefield{labelyear}{\cbx@lastyear}}}
       {\setunit{\compcitedelim}%
        \usebibmacro{cite:shorthand}%
        \global\undef\cbx@lastyear}}
    {\ifnameundef{labelname}
       {\iffieldundef{shorthand}
          {\usebibmacro{cite:label}%
           \setunit{%
             \global\booltrue{cbx:parens}%
             \printdelim{nonameyeardelim}%
             \csuse{extblx@citedelim@textcite@inner@open}}%
           \ifnumequal{\value{citecount}}{1}
             {\usebibmacro{prenote}}
             {}%
           \usebibmacro{cite:labeldate+extradate}}
          {\usebibmacro{cite:shorthand}}}
       {\printnames{labelname}%
        \setunit{%
          \global\booltrue{cbx:parens}%
          \printdelim{nameyeardelim}%
          \csuse{extblx@citedelim@textcite@inner@open}}%
        \ifnumequal{\value{citecount}}{1}
          {\usebibmacro{prenote}}
          {}%
        \iffieldundef{shorthand}
          {\iffieldundef{labelyear}
             {\usebibmacro{cite:label}}
             {\usebibmacro{cite:labeldate+extradate}}%
           \savefield{labelyear}{\cbx@lastyear}}
          {\usebibmacro{cite:shorthand}%
           \global\undef\cbx@lastyear}}%
     \stepcounter{textcitecount}%
     \savefield{namehash}{\cbx@lasthash}}%
  \setunit{%
    \ifbool{cbx:parens}
      {\csuse{extblx@citedelim@textcite@inner@close}%
       \global\boolfalse{cbx:parens}}
      {}%
    \textcitedelim}}

\renewbibmacro*{textcite:postnote}{%
  \usebibmacro{postnote}%
  \ifnumequal{\value{multicitecount}}{\value{multicitetotal}}
    {\setunit{}%
     \printtext{%
       \ifbool{cbx:parens}
         {\csuse{extblx@citedelim@textcite@inner@close}%
          \global\boolfalse{cbx:parens}}
         {}}}
    {\setunit{%
       \ifbool{cbx:parens}
         {\csuse{extblx@citedelim@textcite@inner@close}%
          \global\boolfalse{cbx:parens}}
         {}%
       \textcitedelim}}}

\DeclareCiteCommand{\cite}[\mkoutercitedelim]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand*{\cite}[\mkoutercitedelim]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{citeyear}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand{\parencite}[\mkouterparencitedelim]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand*{\parencite}[\mkouterparencitedelim]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{citeyear}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand{\footcite}[\mkbibfootnote]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand{\footcitetext}[\mkbibfootnotetext]
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {}
  {\usebibmacro{cite:postnote}}

% smartcite's delimcontext needs special attention (see ext-biblatex-aux.def)
\DeclareCiteCommand{\smartcite}[\mksmartcite]
  {\delimcontext{\extblx@thisdelimcontext}%
   \usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {}
  {\usebibmacro{cite:postnote}}

\DeclareCiteCommand{\cbx@textcite}[\mkoutertextcitedelim]
  {\usebibmacro{cite:init}}
  {\usebibmacro{citeindex}%
   \usebibmacro{textcite}}
  {}
  {\usebibmacro{textcite:postnote}}

\DeclareMultiCiteCommand{\cbx@textcites}[\mkoutertextcitedelim]
  {\cbx@textcite}{}

\DeclareMultiCiteCommand{\cites}[\mkoutercitedelim]
  {\cite}{\setunit{\multicitedelim}}
\DeclareMultiCiteCommand{\parencites}[\mkouterparencitedelim]
  {\parencite}{\setunit{\multicitedelim}}
\DeclareMultiCiteCommand{\smartcites}[\mksmartcite]
  {\smartcite}{\setunit{\multicitedelim}}

\DeclareCiteCommand{\bbx@cite@inxref}[\mkouterbibinxrefcitedelim]
  {\boolfalse{citetracker}%
   \boolfalse{pagetracker}%
   \boolfalse{backtracker}%
   \usebibmacro{cite:init}}
  {\usebibmacro{bbx:cite:inxref}}
  {}
  {\usebibmacro{cite:postnote}}

\renewbibmacro*{bbx:introcite}{%
  \usebibmacro{cite}%
  \clearfield{postnote}%
  \usebibmacro{cite:postnote}}

\endinput