%%
%% acmnewbst.sty
%%
%% This file gives citations and bibliography in the style of ACM
%% Transactions.  It is based on esub2acm, the SGML generating style for ACM
%% submissions.
%%
% Bibliographic cite forms needed:
%
%  \cite{key}
%    which produces citations with full author list and year.
%    eg. [Brown 1978; Jarke, Turner, Stohl, et al. 1985]
%  \citeA{key}
%    which produces citations with only the full author list.
%    eg. [Brown; Jarke, Turner and Stohl]
%  \citeN{key}
%    which produces citations with the full author list and year, but
%    can be used as nouns in a sentence; no brackets appear around
%    the author names, but only around the year.
%      eg. Shneiderman [1978] states that......
%    \citeN should only be used for a single citation.
%  \shortcite{key}
%    which produces citations with abbreviated author list and year.
%  \shortciteA{key}
%    which produces only the abbreviated author list.
%  \shortciteN{key}
%    which produces the abbreviated author list and year, with only the
%    year in brackets. Use with only one citation.
%  \citeyear{key}
%    which produces the year information only, within brackets.
%
% Abbreviated author lists use the ``et al.'' construct.
%

\let\@xrefdiagnose\typeout
\DeclareOption{silent}{\let\@xrefdiagnose\@gobble}
\DeclareOption{diagnose}{\let\@xrefdiagnose\typeout}
\ProcessOptions
\typeout{Using author/year ACM bibliography style}
\newcommand\bibyear[2]{%
    \unskip\quad\ignorespaces#1\unskip
    \if#2..\quad \else \quad#2 \fi
}
\newcommand{\bibemph}[1]{{\em#1}}
\newcommand{\bibemphic}[1]{{\em#1\/}}
\newcommand{\bibsc}[1]{{\sc#1}}
\def\@normalcite{%
    \def\@cite##1##2{[##1\if@tempswa , ##2\fi]}%
}
\def\@citeNB{%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
}
\def\@citeRB{%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi]}%
}
\def\start@cite#1#2{%
    \edef\citeauthoryear##1##2##3{%
        ###1%
        \ifnum#2=\z@ \else\ ###2\fi
    }%
    \ifnum#1=\thr@@
        \let\@@cite\@citeyear
    \else
        \let\@@cite\@citenormal
    \fi
    \@ifstar{\@citeNB\@@cite}{\@normalcite\@@cite}%
}
\def\cite{\start@cite23}
\def\citeNP{\cite*}
\def\citeA{\start@cite10}
\def\citeANP{\citeA*}
\def\shortcite{\start@cite23}
\def\shortciteNP{\shortcite*}
\def\shortciteA{\start@cite20}
\def\shortciteANP{\shortciteA*}
\def\citeyear{\start@cite30}
\def\citeyearNP{\citeyear*}
\def\citeN{%
    \@citeRB
    \def\citeauthoryear##1##2##3{##1\ [##3%
        \def\reserved@a{##1}%
        \def\citeauthoryear####1####2####3{%
            \def\reserved@b{####1}%
            \ifx\reserved@a\reserved@b
                ####3%
            \else
                \errmessage{Package acmart Error: author mismatch
                         in \string\citeN^^J^^J%
                    See the acmart package documentation for explanation}%
            \fi
        }%
    }%
    \@ifstar\@citeyear\@citeyear
}
\def\shortciteN{%
    \@citeRB
    \def\citeauthoryear##1##2##3{##2\ [##3%
        \def\reserved@a{##2}%
        \def\citeauthoryear####1####2####3{%
          \def\reserved@b{####2}%
            \ifx\reserved@a\reserved@b
                ####3%
            \else
                \errmessage{Package acmart Error: author mismatch
                         in \string\shortciteN^^J^^J%
                    See the acmart package documentation for explanation}%
            \fi
        }%
    }%
    \@ifstar\@citeyear\@citeyear
}
\def\@citenormal{%
    \@ifnextchar [{\@tempswatrue\@citex;}
                  {\@tempswafalse\@citex;[]}%
}
\def\@citeyear{%
    \@ifnextchar [{\@tempswatrue\@citex,}%
                  {\@tempswafalse\@citex,[]}%
}
\def\@citex#1[#2]#3{%
    \let\@citea\@empty
    \@cite{%
        \@for\@citeb:=#3\do{%
            \@citea
            \def\@citea{#1 }%
            \edef\@citeb{\expandafter\@iden\@citeb}%
            \if@filesw
                \immediate\write\@auxout{\string\citation{\@citeb}}%
            \fi
            \@ifundefined{b@\@citeb}{%
                {\bf ?}%
                \@warning{%
                    Citation `\@citeb' on page \thepage\space undefined%
                }%
            }%
            {\csname b@\@citeb\endcsname}%
        }%
    }{#2}%
}
\let\@biblabel\@gobble
\newdimen\bibindent
\bibindent=1.5em
\def\thebibliography#1{%
  \chapter*{Bibliography\@mkboth{Bibliography}{Bibliography}}
  \addcontentsline{toc}{chapter}{Bibliography}
% \list {\@biblabel{\arabic{enumi}}}{\settowidth\labelwidth{\@biblabel{#1}}
% \leftmargin\labelwidth
% \advance\leftmargin\labelsep
% \usecounter{enumi}}
  \list{[\arabic{enumi}]}{%
    \settowidth\labelwidth{[#1]}%
    \leftmargin\labelwidth
    \advance\leftmargin\labelsep
%    \advance\leftmargin\bibindent
    \itemindent -\bibindent
    \listparindent \itemindent
    \parsep \z@
    \usecounter{enumi}%
    }%
  \let\newblock\@empty
%  \def\newblock{\hskip .11em plus .33em minus -.07em}
  \sloppy
  \sfcode`\.=1000\relax}
%%
%%
%% The following allows us to have xrefs...
%%
%%
\let\prev@cite=\cite
\def\cite{\@ifnextchar[{\@pgcitetrue[\prev@cite]}{\@pgcitefalse[\prev@cite]}}
\let\prev@citeN=\citeN
\def\citeN{\@ifnextchar[{\@pgcitetrue[\prev@citeN]}{\@pgcitefalse[\prev@citeN]}}
\let\prev@citeNP=\citeNP
\def\citeNP{\@ifnextchar[{\@pgcitetrue[\prev@citeNP]}{\@pgcitefalse[\prev@citeNP]}}
\let\prev@citeA=\citeA
\def\citeA{\@ifnextchar[{\@pgcitetrue[\prev@citeA]}{\@pgcitefalse[\prev@citeA]}}
\let\prev@citeANP=\citeANP
\def\citeANP{\@ifnextchar[{\@pgcitetrue[\prev@citeANP]}{\@pgcitefalse[\prev@citeANP]}}
\let\prev@citeyear=\citeyear
\def\citeyear{\@ifnextchar[{\@pgcitetrue[\prev@citeyear]}{\@pgcitefalse[\prev@citeyear]}}
\let\prev@citeyearNP=\citeyearNP
\def\citeyearNP{\@ifnextchar[{\@pgcitetrue[\prev@citeyearNP]}{\@pgcitefalse[\prev@citeyearNP]}}
\let\prev@scite=\shortcite
\def\shortcite{\@ifnextchar[{\@pgcitetrue[\prev@scite]}{\@pgcitefalse[\prev@scite]}}
\let\prev@sciteN=\shortciteN
\def\shortciteN{\@ifnextchar[{\@pgcitetrue[\prev@sciteN]}{\@pgcitefalse[\prev@sciteN]}}
\let\prev@sciteNP=\shortciteNP
\def\shortciteNP{\@ifnextchar[{\@pgcitetrue[\prev@sciteNP]}{\@pgcitefalse[\prev@sciteNP]}}
\let\prev@sciteA=\shortciteA
\def\shortciteA{\@ifnextchar[{\@pgcitetrue[\prev@sciteA]}{\@pgcitefalse[\prev@sciteA]}}
\let\prev@sciteANP=\shortciteANP
\def\shortciteANP{\@ifnextchar[{\@pgcitetrue[\prev@sciteANP]}{\@pgcitefalse[\prev@sciteANP]}}

\def\@pgcitetrue[#1][#2]#3{%
  \@for\pagecitekey:=#3\do{\@delaycite{\pagecitekey}}%
  #1[#2]{#3}}

\def\@pgcitefalse[#1]#2{%
  \@for\pagecitekey:=#2\do{\@delaycite{\pagecitekey}}%
  #1{#2}}

% Kish Shen's hack from \label code to get page numbers right
\def\@delaycite#1{\@bsphack\if@filesw {\let\thepage\relax
   \def\protect{\noexpand\noexpand\noexpand}%
   \xdef\@gtempa{\write\@auxout{\string
   \pagecite{#1}{\thepage}}}}\@gtempa
   \if@nobreak \ifvmode\nobreak\fi\fi\fi\@esphack}

% ----------------------------------------------------------------------
% Define the pagelist for each bibkey. 
%
% Defs and labels:
%
% \def\c@<BibTeX key>    List of pages on which <key> is cited
% \def\n@<BibTeX key>    Last page on which <key> was cited

\def\namexdef#1{\expandafter\xdef\csname #1\endcsname}

% pagecite{<KEY>}{<PAGE>} =
%  ifundefined c@<KEY>
%     c@<KEY> := <PAGE>
%  else
%     if n@<KEY> := <PAGE>
%        c@<KEY> := c@<KEY> , <PAGE>
%  n@<KEY> := <PAGE>
%
\def\pagecite#1#2{
  \@ifundefined{c@#1}{
    \namexdef{c@#1}{#2}
  }{
    \namexdef{tp}{#2}
    \namexdef{tn}{\@nameuse{n@#1}}
    \ifx\tp\tn\else
      \namexdef{c@#1}{\@nameuse{c@#1}, #2}
    \fi
  }
  \namexdef{n@#1}{#2}    
% \typeout{Pagecite `#1' at page #2 (\@nameuse{c@#1}) }
}

% ----------------------------------------------------------------------
% Define what \citepages{<BibTeX key>} does when it is planted by the
% BibTeX style after the reference for key.

\def\citepages#1{
  \@ifundefined{c@#1}{%
    \typeout{Bib-XRef Warning: No page list for reference `#1'.}
  }{%
    \newblock                            % newline if "open" format used
    \namexdef{tn}{\@nameuse{n@#1}}
    \namexdef{tc}{\@nameuse{c@#1}}
    {\ifx\tn\tc
%     \typeout{Reference `#1'\space cited on page \@nameuse{c@#1}}%
      \small (p.\,%
    \else
%     \typeout{Reference `#1'\space cited on pages \@nameuse{c@#1}}%
      \small (pp.\,%
     \fi%
     \@nameuse{c@#1})%
    }
  }
}
\endinput
