Pregunta de seguimiento a la modificación del estilo APA de biblatex

Question

Para mi tesis final necesito utilizar una versión ligeramente modificada del estilo APA. Antes de entrar en más detalles, me gustaría mostrarles un MWE:

\documentclass[12pt]{scrreprt} 
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc} 
\usepackage[ngerman]{babel}
\usepackage{csquotes} 
\usepackage[%
backend=biber,
style=authoryear-comp,
bibstyle=apa]{biblatex}   
\DeclareLanguageMapping{ngerman}{ngerman-apa}
\DefineBibliographyStrings{ngerman}{andothers={et\ \addabbrvspace al\adddot}}

\usepackage{filecontents} 
\begin{filecontents}{literatur.bib} 
@book{XYZ2010, 
 author = {Andrew Alphason and Bertram Betason and Christian Gammason}, 
 year = {2010}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart}
}
@book{XYZ2011,
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2011},
 title = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2012,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2012},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart}, 
}
@incollection{XYZ2013,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2013},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart}, 
}
@book{XYZ2014a, 
 author = {Phil Phison and Bertram Betason}, 
 year = {2014}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
} 
@book{XYZ2014b, 
 author = {{Fictional Institution}}, 
 year = {2014}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2014c,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason and Ezra Epsilonson},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2014},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
\end{filecontents} 
\bibliography{literatur} 

\begin{document} 
\parencite{XYZ2010,XYZ2011,XYZ2012,XYZ2013,XYZ2014a,XYZ2014b,XYZ2014c}
\printbibliography 
\end{document}

Lo que necesito cambiar es:

1. Debe haber una coma antes de "&" en caso de 2 Y más de 2 autores/editores en la posición inicial de la entrada de bibliografía.
2. En caso de que los editores aparezcan después, como en las entradas 3 y 4 del MWE, solo debe haber una coma antes de "&" en caso de que haya más de 2 editores. Aquí no hay coma para solo 2 editores. ¡No me preguntes por qué, solo tengo que hacerlo así!
3. La APA normalmente imprime un período entre los autores/editores/institución y el año (entre paréntesis). No se me permite insertar un punto allí. ¿Como puedo quitarlo? En el ejemplo, no se permitiría el punto en la entrada número 2 después de "(Hrsg.)".

He insertado una imagen de la salida. Utilicé el rojo para indicar lo que estaba mal y el verde para mostrar lo que estaba bien.

Ver tambiénModificación del estilo APA de biblatex..

Answer 1

Creo que este código debería satisfacer sus requisitos:

\documentclass[12pt]{scrreprt}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage{csquotes}
\usepackage[%
backend=biber,
style=authoryear-comp,
bibstyle=apa]{biblatex}
\DeclareLanguageMapping{ngerman}{ngerman-apa}
\DefineBibliographyStrings{ngerman}{andothers={et\ \addabbrvspace al\adddot}}

\usepackage{filecontents}
\begin{filecontents}{literatur.bib}
@book{XYZ2010,
 author = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2010},
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart}
}
@book{XYZ2011,
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2011},
 title = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2012,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2012},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2013,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2013},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@book{XYZ2014a,
 author = {Phil Phison and Bertram Betason},
 year = {2014},
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
}
@book{XYZ2014b,
 author = {{Fictional Institution}},
 year = {2014},
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2014c,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason and Ezra Epsilonson},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2014},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
\end{filecontents}
\bibliography{literatur}

    \usepackage{xpatch}

     \DefineBibliographyExtras{ngerman}{\def\finalandcomma{\addcomma}}

    \xpatchbibmacro{editorinauthpos}{%
           \clearname{editor}%
           \setunit{\adddot\addspace}%
    }{%
           \clearname{editor}%
           \setunit{\addspace}%
    }{}{}
\AtBeginBibliography{\renewcommand*{\finalnamedelim}{%
    \ifthenelse{\value{listcount}>\maxprtauth}
      {}
      {\finalandcomma\addspace\&\space}
         }}

\renewbibmacro*{author}{%
  \ifnameundef{author}
    {\usebibmacro{labeltitle}}
    {\printnames[apaauthor][-\value{listtotal}]{author}%
     \setunit*{\addspace}%
     \printfield{nameaddon}%
     \ifnameundef{with}
       {}
       {\setunit{}\addspace\mkbibparens{\printtext{\bibstring{with}\addspace}%
        \printnames[apaauthor][-\value{listtotal}]{with}}
        \setunit*{\addspace}}}%
  \setunit{\addspace}\newblock%
  \usebibmacro{labelyear+extrayear}}

\xpretobibmacro{editor+trans}{\renewcommand*{\finalnamedelim}{%
  \ifnumgreater{\value{liststop}}{2}{\finalandcomma}{}%
  \addspace\&\space}}


\begin{document}
\parencite{XYZ2010,XYZ2011,XYZ2012,XYZ2013,XYZ2014a,XYZ2014b,XYZ2014c}
\printbibliography
\end{document}