%% ---------------------------------------------------------------
%% biblatex-ieee --- A biblatex implementation of the IEEE 
%%   bibliography style
%% Maintained by Joseph Wright
%% E-mail: joseph.wright@morningstar2.co.uk
%% Released under the LaTeX Project Public License v1.3c or later
%% See http://www.latex-project.org/lppl.txt
%% ---------------------------------------------------------------
%% 

\ProvidesFile{ieee.cbx}[2012/12/17 v1.1f biblatex citation style]

\RequireCitationStyle{numeric-comp}

\ExecuteBibliographyOptions{
    maxcitenames = 3,
    minnames     = 3,
    sorting      = none
}

% Putting brackets around each citation number is a two-part
% operation. First, remove them from around the whole citation by
% redeclaring here.
\DeclareCiteCommand{\cite}%
  {\usebibmacro{cite:init}%
   \usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite:comp}}
  {}
  {\usebibmacro{cite:dump}%
   \usebibmacro{postnote}}

% The second part if more awkward. To add brackets, we cannot use labelnumber
% as the biblatex kernel does not do a great job on the difference between it
% and labelnumberwidth! So instead we tackle the issue here, but that means
% a bit of copy-paste work.
\renewbibmacro*{cite:comp:comp}{%
  \ifboolexpr{
    ( test {\iffieldundef{prefixnumber}} and test {\ifundef\cbx@lastprefix} )
    or
    test {\iffieldequals{prefixnumber}{\cbx@lastprefix}}
  }
    {\ifnumequal{\thefield{labelnumber}}{\value{cbx@tempcntb}}
       {\savefield{entrykey}{\cbx@lastkey}%
	\savefield{labelnumber}{\cbx@lastnumber}%
	\addtocounter{cbx@tempcnta}{1}}
       {\ifnumequal{\thefield{labelnumber}}{\value{cbx@tempcntb}-1}
	  {}
	  {\usebibmacro{cite:dump}%
	   \ifnumgreater{\value{cbx@tempcntb}}{-1}
	     {\multicitedelim}
	     {}%
	   \printtext[brackets]{\printtext[bibhyperref]{%
	     \printfield{prefixnumber}%
	     \printfield{labelnumber}}}}}}
    {\usebibmacro{cite:comp:end}}%
  \setcounter{cbx@tempcntb}{\thefield{labelnumber}}%
  \savefield{prefixnumber}{\cbx@lastprefix}}

\renewbibmacro*{cite:comp:end}{%
  \usebibmacro{cite:dump}%
  \ifnumgreater{\value{cbx@tempcntb}}{-1}
    {\multicitedelim}
    {}%
  \printtext[brackets]{\printtext[bibhyperref]{%
    \printfield{prefixnumber}%
    \printfield{labelnumber}}}}

\renewbibmacro*{cite:comp:inset}{%
  \usebibmacro{cite:dump}%
  \ifnumgreater{\value{cbx@tempcntb}}{-1}
    {\multicitedelim}
    {}%
  \printtext[brackets]{\printtext[bibhyperref]{%
    \printfield{prefixnumber}%
    \printfield{labelnumber}%
    \printfield{entrysetcount}}}%
  \setcounter{cbx@tempcntb}{-1}}

\renewbibmacro*{cite:dump}{%
  \ifnumgreater{\value{cbx@tempcnta}}{0}
    {\ifnumgreater{\value{cbx@tempcnta}}{1}
       {\bibrangedash}
       {\multicitedelim}%
     \bibhyperref[\cbx@lastkey]{%
       \ifdef\cbx@lastprefix
         {\printtext[prefixnumber]{\cbx@lastprefix}}
	 {}%
       \printtext[brackets]{\cbx@lastnumber}}}
    {}%
  \setcounter{cbx@tempcnta}{0}%
  \global\undef\cbx@lastprefix}
  
% More fun, this time with \textcite, which has brackets hard-coded in
% the original
\renewbibmacro*{textcite}{%
  \iffieldequals{namehash}{\cbx@lasthash}
    {\usebibmacro{cite:comp}}
    {\usebibmacro{cite:dump}\cbx@tempa
     \usebibmacro{cite:init}%
     \ifnameundef{labelname}
       {\printfield[citetitle]{labeltitle}}
       {\printnames{labelname}}%
     \addspace
     \ifnumequal{\value{citecount}}{1}
       {\usebibmacro{prenote}}
       {}%
     \usebibmacro{cite:comp}}%
  \savefield{namehash}{\cbx@lasthash}%
  \gdef\cbx@tempa{\multicitedelim}}
  
\DeclareCiteCommand{\textcite}
  {\usebibmacro{cite:init}}
  {\usebibmacro{citeindex}%
   \usebibmacro{textcite}}
  {}
  {\usebibmacro{postnote}}

%% 
%% Copyright (C) 2011,2012 by
%%   Joseph Wright <joseph.wright@morningstar2.co.uk>
%% 
%% It may be distributed and/or modified under the conditions of
%% the LaTeX Project Public License (LPPL), either version 1.3c of
%% this license or (at your option) any later version.  The latest
%% version of this license is in the file:
%% 
%%    http://www.latex-project.org/lppl.txt
%% 
%% This work is "maintained" (as per LPPL maintenance status) by
%%   Joseph Wright.
%% 
%% This work consists of the files biblatex-ieee.bib,
%%                                 biblatex-ieee.tex,
%%                                 ieee.bbx,
%%                                 ieee.cbx,
%%                                 ieee-alphabetic.bbx and
%%                                 ieee-alphabetic.cbx,
%%           and the derived files biblatex-ieee.pdf and
%%                                 biblatex-ieee-alphabetic.pdf.
%% 
%%
%% End of file `ieee.cbx'.