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% Copyright 2003--2007 by Till Tantau
% Copyright 2010 by Vedran Mileti\'c
% Copyright 2012,2013,2015 by Vedran Mileti\'c, Joseph Wright
% Copyright 2016
% Copyright 2017,2018 by Louis Stuart, Joseph Wright
%
% 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.
% Force e-TeX and provide \patchcmd
\RequirePackage{etoolbox}
% Booleans for options available for both beamer and beamerarticle
\newif\ifbeamer@blocks \beamer@blockstrue
\newif\ifbeamer@ams \beamer@amstrue
\newif\ifbeamer@amssymb \beamer@amssymbtrue
\newif\ifbeamer@countsect \beamer@countsectfalse % A no-op but for clarity
\newif\ifbeamer@keywords \beamer@keywordstrue
% Scratch space
\newbox\beamer@tempbox
\newcount\beamer@tempcount
% The pauses counter is public and global, and required by both
% beamer and beamerarticle
\newcounter{beamerpauses}
\RequirePackage{beamerbasedecode}
%
% Presentation/article stuff
%
% Copyright notice: Part of the following code is taken from the
% package comment.sty by Victor Eijkhout
%
%
% Comment stuff. This will also be needed, if we switch to another
% class, so define it here already.
%
\newif\ifbeamer@inpresentation
\beamer@inpresentationtrue
\def\beamer@startcomment{%
\begingroup
\let\do\@makeother\dospecials
\catcode`\^^L=12 % and whatever other special cases
\endlinechar`\^^M %
\catcode`\^^M=12 %
\beamer@processline}
\begingroup
\catcode`\^^M=12\relax\endlinechar=-1\relax%
\long\gdef\beamer@processline#1^^M{%
\def\beamer@test{#1}%
\ifx\beamer@test\beamer@stopmodestar%
\let\next=\beamer@modeoutsideframe%
\else%
\ifx\beamer@test\beamer@stopmode%
\let\next=\mode%
\else%
\ifx\beamer@test\beamer@stoparticle%
\let\next=\article%
\else%
\ifx\beamer@test\beamer@stoppresentation%
\let\next=\presentation%
\else%
\ifx\beamer@test\beamer@stopcommon%
\let\next=\common%
\else%
\ifx\beamer@test\beamer@stopdocument%
\let\next=\beamer@enddocument%
\else
\ifx\beamer@test\beamer@begindocument%
\let\next=\beamer@startdocument%
\else
\let\next=\beamer@processline%
\fi%
\fi%
\fi%
\fi%
\fi%
\fi%
\fi%
\next}
\endgroup
\def\beamer@enddocument{\beamer@closer\end{document}}
\def\beamer@startdocument{%
\beamer@closer
\begin{document}%
\gdef\beamer@closer{}%
\mode<all>}
\def\beamer@closer{}
\begingroup
\escapechar=-1\relax
\xdef\beamer@stopmode{\string\\mode}
\xdef\beamer@stopmodestar{\string\\mode*}
\xdef\beamer@stoparticle{\string\\article}
\xdef\beamer@stoppresentation{\string\\presentation}
\xdef\beamer@stopcommon{\string\\common}
\xdef\beamer@stopdocument{\string\\end\string\{document\string\}}
\xdef\beamer@begindocument{\string\\begin\string\{document\string\}}
\endgroup
\newbox\beamer@commentbox
\def\beamer@startcommentinframe{%
\begingroup
\xdef\beamer@closer{\egroup\beamer@closer}%
\setbox\beamer@commentbox=\vbox\bgroup\leavevmode}
\def\beamer@outsidemode{\afterassignment\beamer@treat\let\beamer@nexttoken=}
% Deals with the various tokens that need to be 'active' even when skipping
% material outside frames
\def\beamer@treat{%
\ifx\beamer@nexttoken\frame\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\lecture\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\note\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\appendix\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\beamer@appendixwrite\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\againframe\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\section\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\subsection\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\subsubsection\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\part\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\article\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\mode\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\common\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\presentation\let\next=\beamer@stopoutsidemode\fi
\ifx\beamer@nexttoken\begin\let\next=\beamer@checkbeginframe\fi
\ifx\beamer@nexttoken\end\let\next=\beamer@checkenddoc\fi
\next}
\def\beamer@stopoutsidemode{\beamer@nexttoken}
\def\beamer@checkenddoc#1{%
\def\beamer@temp{#1}%
\ifx\beamer@temp\beamer@enddoc
\let\next=\beamer@enddocument
\else
\let\next=\beamer@outsidemode
\fi
\next}
\def\beamer@enddoc{document}
\def\beamer@checkbeginframe#1{%
\def\beamer@temp{#1}%
\ifx\beamer@temp\beamer@frametext
\let\next=\beamer@beginframeenv
\else
\let\next=\beamer@outsidemode
\fi
\next}
\def\beamer@beginframeenv{\begin{frame}}
\def\beamer@modeoutsideframe{%
\beamer@closer
\gdef\beamer@closer{}%
\gdef\beamer@mode{\beamer@modeoutsideframe}%
\ifbeamer@inpresentation
\let\next=\beamer@outsidemode
\else
\let\next=\relax
\fi%
\next}
% Obsolete, do not use!
\newrobustcmd*\presentation{\mode<presentation>}
\newrobustcmd*\article{\mode<article>}
\newrobustcmd*\common{\mode<all>}
%
% Mode command
%
\newrobustcmd*\mode{\@ifstar\beamer@modeoutsideframe\beamer@@@mode}
\def\beamer@@@mode<#1>{%
\beamer@closer
\@ifnextchar\bgroup
{\beamer@modeinline<#1>}%
{\beamer@switchmode<#1>}}
\long\def\beamer@modeinline<#1>#2{%
\gdef\beamer@closer{}%
\gdef\beamer@doifnotinframe{\@gobble}%
\def\beamer@doifinframe{\@firstofone}%
\begingroup
\beamer@saveanother
\beamer@slideinframe=1\relax%
\beamer@masterdecode{#1}%
\beamer@restoreanother
\endgroup
\beamer@donow{#2}%
\beamer@mode\par}
\def\beamer@switchmode<#1>{%
\gdef\beamer@mode{\beamer@switchmode<#1>}%
\gdef\beamer@doifnotinframe{%
\let\next=\beamer@startcomment
\gdef\beamer@closer{\endgroup}%
}%
\def\beamer@doifinframe{%
\let\next=\relax
\gdef\beamer@closer{}%
}%
\begingroup
\beamer@saveanother
\beamer@slideinframe=1\relax%
\beamer@masterdecode{#1}%
\beamer@restoreanother
\endgroup
\beamer@donow
\next}
\def\beamer@saveanother{\let\beamer@savedif=\ifbeamer@anotherslide}
\def\beamer@restoreanother{\global\let\ifbeamer@anotherslide=\beamer@savedif}
\mode
<all>
\newcount\beamer@modecount
\def\beamer@pushmode#1{%
\expandafter\gdef\csname beamer@savedmode@\the\beamer@modecount\endcsname{#1}%
\global\advance\beamer@modecount by1\relax}
\def\beamer@popmode{
\global\advance\beamer@modecount by-1\relax%
\csname beamer@savedmode@\the\beamer@modecount\endcsname}
\def\beamer@savemode{\expandafter\beamer@pushmode\expandafter{\beamer@mode}}
\def\beamer@resumemode{\beamer@popmode}
%
% Stuff needed in both article and presentation version
%
\newcommand*\jobnamebeamerversion{}
\newrobustcmd*\includeslide[2][]{%
\ifx\jobnamebeamerversion\@empty
\ClassError{beamer}{Invoke macro "setjobnamebeamerversion" first}\@ehc
\else
\edef\beamer@args
{[{#1,page=\csname beamer@slide#2\endcsname}]{\jobnamebeamerversion}}%
\expandafter\pgfimage\beamer@args
\fi}
\newrobustcmd*\setjobnamebeamerversion[1]{%
\gdef\jobnamebeamerversion{#1}%
\begingroup
\makeatletter
\@input{\jobnamebeamerversion.snm}%
\endgroup}
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