\ProvidesFile{ext-authortitle-terse.cbx}
  [2018/03/18 v0.1 extended biblatex authortitle-terse
   citation style (MW)]

\RequireCitationStyle{ext-authortitle}
\ExecuteBibliographyOptions{singletitle,uniquename,uniquelist,autocite=inline}

\renewbibmacro*{cite}{%
  \iffieldundef{shorthand}
    {\ifnameundef{labelname}
       {\usebibmacro{cite:title}}
       {\ifsingletitle
          {\printtext[bibhyperref]{\printnames{labelname}}}
          {\printnames{labelname}%
           \setunit{\printdelim{nametitledelim}}%
           \usebibmacro{cite:title}}}}%
    {\usebibmacro{cite:shorthand}}}

\renewbibmacro*{textcite}{%
  \ifnameundef{labelname}
    {\ifnumequal{\value{citecount}}{1}
       {\usebibmacro{prenote}}
       {}%
     \iffieldundef{shorthand}
       {\usebibmacro{cite:title}}%
       {\usebibmacro{cite:shorthand}}}
    {\ifthenelse{\ifsingletitle\AND
                 \(\iffieldundef{prenote}\OR\value{citecount}>1\)}
       {\printtext[bibhyperref]{\printnames{labelname}}}
       {\printnames{labelname}%
        \setunit{%
          \global\booltrue{cbx:parens}%
          \printdelim{nametitledelim}%
          \csuse{extblx@citedelim@textcite@inner@open}}%
        \ifnumequal{\value{citecount}}{1}
          {\usebibmacro{prenote}}
          {}%
        \iffieldundef{shorthand}
          {\usebibmacro{cite:title}}%
          {\usebibmacro{cite:shorthand}}}}}

\endinput