%% --------------- Bibliography setup --------------------------------------

\usepackage{csquotes}	% recommended for biblatex

%\usepackage[babel,german=quotes]{csquotes}	% utf8-change ??

%utf8-change

%Note: biblatex with bibtex backend is frozen at version 1.7.

\usepackage[style=numeric-comp,backend=biber,bibencoding=auto]{biblatex}[2013/01/10] %utf8-change

\ExecuteBibliographyOptions{bibwarn=true,sortcites=true,defernumbers=true,isbn=false,doi=false,backref=true}

%% titles of reference section + 3 categories of references:

\newcommand{\@bibtitle}{Quellenverzeichnis}

\newcommand{\@bibtitleLiteratur}{Literatur}

\newcommand{\@bibtitleAvmedia}{Filme und audiovisuelle Medien}

\newcommand{\@bibtitleOnline}{Online-Quellen}	

\ifthenelse{\equal{\hgb@MainLanguage}{english}}{%

	\renewcommand{\@bibtitle}{References}

	\renewcommand{\@bibtitleLiteratur}{Literature}

	\renewcommand{\@bibtitleAvmedia}{Films and audio-visual media}

	\renewcommand{\@bibtitleOnline}{Online sources}	

}{}

\defbibfilter{literature}{

	not ( type=movie or type=video or type=music or type=audio or 

				type=online or type=electronic or type=www or type=software )}

\defbibfilter{avmedia}{%

	( type=movie or type=video or type=music or type=audio or type=software )}

\defbibfilter{online}{%

	( type=online or type=electronic or type=www )}

\defbibheading{noheader}[]{}	% 'none' should be defined but isn't

% utf8-change (deactivated):

% German format in biblatex is flawed: it adds wrong spaces and prohibits

% line breaking within date strings. Corrected by Wilbur as follows.

% Taken from german.lbx: replaced \thinspace by breaking zero space \hskip0pt 

%\DefineBibliographyExtras{ngerman}{% 

  %\def\mkbibdatelong#1#2#3{%

    %\iffieldundef{#3}

      %{\hskip0pt}

      %{\mkbibordinal{\thefield{#3}}%

       %\iffieldundef{#2}{}{\space}}%	%was: \nobreakspace

    %\iffieldundef{#2}

      %{\hskip0pt}

      %{\mkbibmonth{\thefield{#2}}%

       %\iffieldundef{#1}{\hskip0pt}{\space}}%

    %\stripzeros{\thefield{#1}}}%

%%

  %\def\mkbibdateshort#1#2#3{%

    %\iffieldundef{#3}

      %{\hskip0pt}

      %{\mkdatezeros{\thefield{#3}}\adddot

       %\iffieldundef{#2}{}{\hskip0pt}}%

    %\iffieldundef{#2}

      %{\hskip0pt}

      %{\mkdatezeros{\thefield{#2}}%

       %\iffieldundef{#1}

	 %{\hskip0pt}

	 %{\iffieldundef{#3}{/}{\adddot\hskip0pt}}}%

    %\mkdatezeros{\thefield{#1}}}%

%}

% utf8-change (deactivated):

% Similar problem with badly braking date strings in english.

% Taken from english.lbx: added breaking zero space \hskip0pt to /

%\DefineBibliographyExtras{english}{% 

  %\def\mkbibdatelong#1#2#3{%

    %\iffieldundef{#2}

      %{}

      %{\mkbibmonth{\thefield{#2}}%

       %\iffieldundef{#3}

         %{\iffieldundef{#1}{}{\space}}

	 %{\space}}%	%was: \nobreakspace

    %\iffieldundef{#3}

      %{}

      %{\stripzeros{\thefield{#3}}%

       %\iffieldundef{#1}{}{,\space}}%

    %\stripzeros{\thefield{#1}}}%

%%

  %\def\mkbibdateshort#1#2#3{%

    %\iffieldundef{#2}

      %{}

      %{\mkdatezeros{\thefield{#2}}%

       %\iffieldundef{#3}

         %{\iffieldundef{#1}{}{/{\hskip0pt}}}

	 %{/{\hskip0pt}}}%

    %\iffieldundef{#3}

      %{}

      %{\mkdatezeros{\thefield{#3}}%

       %\iffieldundef{#1}{}{/{\hskip0pt}}}%

    %\mkdatezeros{\thefield{#1}}}%

%}

%This is only a wrapper to \addbibresource to allow the use

%of the classic bibtex-workflow in the future.

\newcommand{\AddBibFile}[1]{

	\addbibresource{#1}%

}

%See http://www.jr-x.de/publikationen/latex/tipps/zeilenumbruch.html

\newenvironment{bibhyphenation}% 

	{\hyphenpenalty=20%		(50)

	 \tolerance=9999%				(200)

	 \exhyphenpenalty=0%		(50)

	 \linepenalty=0%				(10)

	 \setlength{\emergencystretch}{3em}}%

	{}

% Currently the only public macro:

% \MakeBibliography ... creates a reference section split subsections (default)

% \MakeBibliography[nosplit] ... creates a one-piece reference section

\newcommand{\MakeBibliography}[1][]{

	% opt. arg (#1): optional argument "nosplit" to get a 1-piece bibliography

	\clearpage

	\ifthenelse{\equal{#1}{nosplit}}%

		{% create a single bibliography with all entries:

			%\printbibheading[heading=bibintoc,title={#2}]

			\printbibheading[heading=bibintoc,title={\@bibtitle}]

			\begin{bibhyphenation}	

			\printbibliography[heading=noheader]

			\end{bibhyphenation}

		}

		{% split the bibliography using the predefined categories:

			%\printbibheading[heading=bibintoc,title={#2}]

			\printbibheading[heading=bibintoc,title={\@bibtitle}]

			\begin{bibhyphenation}

			\printbibliography[filter=literature,heading=subbibintoc,title={\@bibtitleLiteratur}]

			\printbibliography[filter=avmedia,heading=subbibintoc,title={\@bibtitleAvmedia}]

			\printbibliography[filter=online,heading=subbibintoc,title={\@bibtitleOnline}]

			\end{bibhyphenation}

		}%

}