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%% hgbbib.sty
%% Bibliography Setup
%% This file is part of the Hagenberg Thesis package for creating bachelors's and masters's theses
%% Author: Wilhelm Burger (wilhelm.burger@fh-hagenberg.at)
%% GitHub: https://github.com/Digital-Media/HagenbergThesis
%% File encoding: ASCII

\ProvidesPackage{hgbbib}[2019/05/11]

\usepackage{csquotes}				% recommended for biblatex

%Note: biblatex with bibtex backend is frozen at version 1.7.
\usepackage[style=numeric-comp,backend=biber,bibencoding=auto]{biblatex}
\ExecuteBibliographyOptions{
	bibwarn=true,
	sortcites=true,
	defernumbers=true,
	isbn=false,
	doi=false,
	backref=true,
	backrefstyle=three}

%% titles of reference section + 3 categories of references:
\newcommand{\@bibtitle}{Quellenverzeichnis}
\newcommand{\@bibtitleLiteratur}{Literatur}
\newcommand{\@bibtitleAvmedia}{Audiovisuelle Medien}
\newcommand{\@bibtitleOnline}{Online-Quellen}
\newcommand{\@bibtitleSoftware}{Software}	

\ifthenelse{\equal{\hgb@MainLanguage}{english}}{%
	\renewcommand{\@bibtitle}{References}
	\renewcommand{\@bibtitleLiteratur}{Literature}
	\renewcommand{\@bibtitleAvmedia}{Audio-visual media}
	\renewcommand{\@bibtitleOnline}{Online sources}	
	\renewcommand{\@bibtitleSoftware}{Software}
}{}

%% categories for a split bibliography (order of declaration is important!)
\DeclareBibliographyCategory{literature}
\DeclareBibliographyCategory{avmedia}
\DeclareBibliographyCategory{software}
\DeclareBibliographyCategory{online}

%% headings for the bibliography categories
\defbibheading{literature}{%
	\phantomsection%
	\section*{\@bibtitleLiteratur}%
	\addcontentsline{toc}{section}{\@bibtitleLiteratur}%
}

\defbibheading{avmedia}{%
	\pagebreak[3]%
	\phantomsection%
	\section*{\@bibtitleAvmedia}%
	\addcontentsline{toc}{section}{\@bibtitleAvmedia}%
}

\defbibheading{online}{%
	\pagebreak[3]%
	\phantomsection%
	\section*{\@bibtitleOnline}%
	\addcontentsline{toc}{section}{\@bibtitleOnline}%
}

\defbibheading{software}{%
	\pagebreak[3]%
	\phantomsection%
	\section*{\@bibtitleSoftware}%
	\addcontentsline{toc}{section}{\@bibtitleSoftware}%
}

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

%Assign a given bibliography entry to one of the defined categories.
\newcommand{\@AssignToBibCategory}[1]% argument 1: entry key 
{\ifthenelse{%
		\ifentrytype{online}\OR
		\ifentrytype{www}}
	{\addtocategory{online}{#1}}%
{\ifthenelse{%
		\ifentrytype{movie}\OR
		\ifentrytype{video}\OR
		\ifentrytype{music}\OR
		\ifentrytype{audio}\OR
		\ifentrytype{image}}
	{\addtocategory{avmedia}{#1}}%
{\ifthenelse{%
		\ifentrytype{software}\OR
		\ifentrytype{electronic}}
	{\addtocategory{software}{#1}}%
	{\addtocategory{literature}{#1}}% else (default)
}}}

%Hook provided by biblatex.
\AtEveryCitekey{\@AssignToBibCategory{\thefield{entrykey}}}

%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=2%		(default 50)
	 \tolerance=9999%			(default 200)
	 \exhyphenpenalty=2%	(default 50)
	 \linepenalty=1%			(default 10)
	 \setlength{\emergencystretch}{3em}%
	 % allow URL hyphenation at any character (definitions in biblatex.def)
	 \setcounter{biburlnumpenalty}{1}%
	 \setcounter{biburlucpenalty}{1}%
	 \setcounter{biburllcpenalty}{1}%
	 \biburlsetup}%
	{}

% 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={\@bibtitle}]
			\begin{bibhyphenation}	
			\printbibliography[heading=noheader]
			\end{bibhyphenation}
		}
		{% split the bibliography using the predefined categories:
			\printbibheading[heading=bibintoc,title={\@bibtitle}]
			\begin{bibhyphenation}
			\bibbycategory
			\end{bibhyphenation}
		}%
}

% Suppress unusual "In:" within journal article references. 
% see http://tex.stackexchange.com/questions/10682/suppress-in-biblatex
\renewbibmacro{in:}{%
	\ifentrytype{article}{}{%
	\printtext{\bibstring{in}\intitlepunct}}}


% To suppress warnings related to missing biblatex "drivers":
\DeclareBibliographyAlias{video}{misc}
\DeclareBibliographyAlias{movie}{misc}
\DeclareBibliographyAlias{audio}{misc}
\DeclareBibliographyAlias{software}{misc}
\DeclareBibliographyAlias{electronic}{misc}
\DeclareBibliographyAlias{image}{misc}
\DeclareBibliographyAlias{standard}{misc}


% Use a semicolon between multiple entries in \cites
%\renewcommand*{\multicitedelim}{\addsemicolon\space}		%% abandoned, affects regular \cite{a,b,c,..} entries too

% New command for multiple citations with supplementary texts
% usage: \mcite[text1]{key1}[text2]{key2}...[textN]{keyN}
% see https://tex.stackexchange.com/a/132981
\DeclareMultiCiteCommand{\mcite}[\mkbibbrackets]{\cite}{\addsemicolon\space}


% Macro to produce cites with no backref entries
% Modified from http://mirrors.ibiblio.org/CTAN/macros/latex/contrib/biblatex-contrib/biblatex-ieee/ieee.cbx
% See also https://tex.stackexchange.com/questions/344861/biblatex-backref-option-per-entry
\DeclareCiteCommand{\citenobr}%
  {\usebibmacro{cite:init}%
   \bibopenbracket
	 \backtrackerfalse\usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite:comp}}
  {}
  {\usebibmacro{cite:dump}%
   \usebibmacro{postnote}%
   \bibclosebracket
  }