beamer / base / beamerbaseoptions.sty

% Copyright 2003--2007 by Till Tantau
% Copyright 2010 by Vedran Mileti\'c
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/licenses/LICENSE for more details.

\ProvidesPackageRCS $Header$

\RequirePackage{keyval}[1997/11/10]

\def\ProcessOptionsBeamer{%
  \let\@tempa\@empty
  \ifx\@currext\@clsextension%
  \else
  \@for\CurrentOption:=\@classoptionslist\do{%
    \@ifundefined{KV@\@currname @\CurrentOption}%
    {}{\edef\@tempa{\@tempa,\CurrentOption,}}}%
  \fi
  \edef\@tempa{%
    \noexpand\setkeys{\@currname}{\@tempa\@ptionlist{\@currname.\@currext}}}%
  \let\beamer@origkverr\KV@err%
  \ifx\@currext\@clsextension\let\KV@errx=\@gobble\fi% never mind
  \@tempa%
  \let\KV@err\beamer@origkverr%
  \AtEndOfPackage{\let\@unprocessedoptions\relax}}

\def\ExecuteOptionsBeamer#1{%
  \setkeys{\@currname}{#1}}

\def\DeclareOptionBeamer#1{\@ifnextchar[{\beamer@dokv{#1}}{\beamer@dokv{#1}[]}}
\long\def\beamer@dokv#1[#2]#3{\define@key{\@currname}{#1}[{#2}]{#3}}


\def\beamer@filterclassoptions{
  \def\beamer@filteredclassoptionslist{}
  \@for\CurrentOption:=\@classoptionslist\do{%
    \ifx\CurrentOption\@empty\else
    \@expandtwoargs\in@{=}{\CurrentOption}%
    \ifin@
    \else
    \edef\beamer@filteredclassoptionslist{%
      \beamer@filteredclassoptionslist,\CurrentOption}
    \fi
    \fi
  }%
  \let\@classoptionslist=\beamer@filteredclassoptionslist
}



\newcommand\defbeameroption{\define@key{beamer@option}}
\newcommand\setbeameroption{\setkeys{beamer@option}}
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