

% ..............................................................................
% The outer beamer theme accoridng to the FAU corporate style guide 2021, see 
%
% https://www.intern.fau.de/kommunikation-marketing-und-corporate-identity/corporate-identity/
%
%
% Copyright 2022 by Tim Roith <tim.roith@fau.de>
%
% This program can be redistributed and/or modified under the terms
% of the GNU Public License, version 2.
%
% ------------------------------------------------------------------------------

\ProvidesPackage{styles/beamerouterthemefau}
% ..............................................................................
\newdimen\fau@outer@SideBarWidthLeft % width of the left sidbar
\newdimen\fau@outer@HeaderHeight % header height without separation line
\newdimen\fau@outer@HeaderTitleHeight
\newdimen\fau@outer@LineWidthThick % thick linewidth
\newdimen\fau@outer@LineWidthThin % thin linewidth
\newdimen\fau@outer@TitleHeight % title height
\newdimen\fau@outer@TitleSkip
\newdimen\fau@outer@TitleLineHeight
\newdimen\fau@outer@TitleTitleSkip 
\newdimen\fau@outer@FootHeight
\newdimen\fau@outer@FootLineSkip
\newdimen\fau@outer@WordMarkHeight
\newdimen\fau@outer@WordMarkWidth
\newdimen\fau@outer@WordMarkTitleHeight
\newdimen\fau@outer@WordMarkTitleWidth
\newdimen\fau@outer@WordMarkLeftHeight
\newdimen\fau@outer@WordMarkLeftWidth
\newdimen\fau@outer@WordMarkBoxWidth
\newdimen\fau@outer@TitleSkipLeft
%
% dimensions for lobal use
%
\newdimen\FrameHeight
\newdimen\TitleHeight
%
\newif\iffau@outer@InsertTotalFoot\fau@outer@InsertTotalFootfalse
\newif\iffau@outer@InsertSecondLogo\fau@outer@InsertSecondLogofalse
\newif\iffau@outer@InsertThirdLogo\fau@outer@InsertThirdLogofalse
% ..............................................................................
% Dimensions
% -------
%
% We define the relevant dimensions for this template.
% ------------------------------------------------------------------------------
\def\fau@inner@XScale{1.}
\def\fau@inner@YScale{1.}
\DeclareOptionBeamer{XScale}{\def\fau@inner@XScale{#1}} % scale factor for x dimension
\DeclareOptionBeamer{YScale}{\def\fau@inner@YScale{#1}} % scale factor for y dimension

\DeclareOptionBeamer{SideBarWidthLeft}{\fau@outer@SideBarWidthLeft=#1}
\DeclareOptionBeamer{HeaderHeight}{\fau@outer@HeaderHeight=#1}
\DeclareOptionBeamer{HeaderTitleHeight}{\fau@outer@HeaderTitleHeight=#1}
\DeclareOptionBeamer{TitleHeight}{\fau@outer@TitleHeight=#1}
\DeclareOptionBeamer{TitleLineHeight}{\fau@outer@TitleLineHeight=#1}
\DeclareOptionBeamer{TitleSkip}{\fau@outer@TitleSkip=#1}
\DeclareOptionBeamer{TitleTitleSkip}{\fau@outer@TitleTitleSkip=#1}
\DeclareOptionBeamer{TitleSkipLeft}{\fau@outer@TitleSkipLeft=#1}
\DeclareOptionBeamer{LineWidthThick}{\fau@outer@LineWidthThick=#1}
\DeclareOptionBeamer{LineWidthThin}{\fau@outer@LineWidthThin=#1}
\DeclareOptionBeamer{FootHeight}{\fau@outer@FootHeight=#1}
\DeclareOptionBeamer{FootLineSkip}{\fau@outer@FootLineSkip=#1}
\DeclareOptionBeamer{WordMarkHeight}{\fau@outer@WordMarkHeight=#1}
\DeclareOptionBeamer{WordMarkWidth}{\fau@outer@WordMarkWidth=#1}
\DeclareOptionBeamer{WordMarkTitleHeight}{\fau@outer@WordMarkTitleHeight=#1}
\DeclareOptionBeamer{WordMarkTitleWidth}{\fau@outer@WordMarkTitleWidth=#1}
\DeclareOptionBeamer{WordMarkLeftHeight}{\fau@outer@WordMarkLeftHeight=#1}
\DeclareOptionBeamer{WordMarkLeftWidth}{\fau@outer@WordMarkLeftWidth=#1}
\DeclareOptionBeamer{WordMarkBoxWidth}{\fau@outer@WordMarkBoxWidth=#1}
%
\DeclareOptionBeamer{InsertTotalFoot}{\fau@outer@InsertTotalFoottrue}
\DeclareOptionBeamer{WordMark}{\def\fau@outer@WordMark{#1}}
\DeclareOptionBeamer{WordMarkTitle}{\def\fau@outer@WordMarkTitle{#1}}
\DeclareOptionBeamer{WordMarkTitleLeft}{\def\fau@outer@WordMarkTitleLeft{#1}}
\DeclareOptionBeamer{SecondLogo}{%
	\def\fau@outer@SecondLogo{#1}%
	\fau@outer@InsertSecondLogotrue%
}
\DeclareOptionBeamer{ThirdLogo}{%
	\def\fau@outer@ThirdLogo{#1}%
	\fau@outer@InsertThirdLogotrue%
}
% ------------------------------------------------------------------------------

% ..............................................................................
\ProcessOptionsBeamer
\mode<presentation>
% ..............................................................................
% Scale the dimensions
% -------------------
\fau@outer@SideBarWidthLeft=\fau@inner@XScale\dimexpr\fau@outer@SideBarWidthLeft
\fau@outer@HeaderHeight=\fau@inner@YScale\dimexpr\fau@outer@HeaderHeight
\fau@outer@HeaderTitleHeight=\fau@inner@YScale\dimexpr\fau@outer@HeaderTitleHeight
\fau@outer@LineWidthThick=\fau@inner@YScale\dimexpr\fau@outer@LineWidthThick
\fau@outer@LineWidthThin=\fau@inner@YScale\dimexpr\fau@outer@LineWidthThin
\fau@outer@TitleHeight=\fau@inner@YScale\dimexpr\fau@outer@TitleHeight
\fau@outer@TitleSkip=\fau@inner@YScale\dimexpr\fau@outer@TitleSkip
\fau@outer@TitleLineHeight=\fau@inner@YScale\dimexpr\fau@outer@TitleLineHeight
\fau@outer@TitleTitleSkip=\fau@inner@YScale\dimexpr\fau@outer@TitleTitleSkip
\fau@outer@FootHeight=\fau@inner@YScale\dimexpr\fau@outer@FootHeight
\fau@outer@FootLineSkip=\fau@inner@YScale\dimexpr\fau@outer@FootLineSkip
\fau@outer@WordMarkHeight=\fau@inner@YScale\dimexpr\fau@outer@WordMarkHeight
\fau@outer@WordMarkWidth=\fau@inner@XScale\dimexpr\fau@outer@WordMarkWidth
\fau@outer@WordMarkTitleHeight=\fau@inner@YScale\dimexpr\fau@outer@WordMarkTitleHeight
\fau@outer@WordMarkTitleWidth=\fau@inner@XScale\dimexpr\fau@outer@WordMarkTitleWidth
\fau@outer@WordMarkLeftHeight=\fau@inner@YScale\dimexpr\fau@outer@WordMarkLeftHeight
\fau@outer@WordMarkLeftWidth=\fau@inner@XScale\dimexpr\fau@outer@WordMarkLeftWidth
\fau@outer@WordMarkBoxWidth=\fau@inner@XScale\dimexpr\fau@outer@WordMarkBoxWidth
% ..............................................................................
%
%
%
\setlength{\FrameHeight}{\dimexpr\paperheight-\fau@outer@HeaderHeight-\fau@outer@TitleHeight-\fau@outer@FootHeight-6mm}
\setlength{\TitleHeight}{\fau@outer@TitleHeight}
% ..............................................................................
\RequirePackage{tikz}
\RequirePackage{graphicx}

% ..............................................................................
% Headline
% -------
%
% This section specifies the behaviour of the frame headline.
% ------------------------------------------------------------------------------



\defbeamertemplate{headline}{headline default}{%
\begin{beamercolorbox}[%
	wd=\paperwidth,%
	ht=\fau@outer@HeaderHeight,%
	dp=0ex,sep=0pt]{headline}%
\end{beamercolorbox}%
}%

\defbeamertemplate{headline}{headline title}{%
\begin{beamercolorbox}[wd=\paperwidth,
					   ht=\fau@outer@HeaderHeight, dp=0ex,sep=0pt]{headline title}%
\end{beamercolorbox}%
%
}%
\setbeamertemplate{headline}[headline default]
% ..............................................................................
% Frame title
% -----------
%
% ------------------------------------------------------------------------------
\newlength{\titlelength}
\newsavebox{\titlebox}

\newcommand{\frametitlewrapper}[9]{%
\nointerlineskip%
\begin{beamercolorbox}[dp=0cm, sep=0.0cm,left,
					   wd=\dimexpr\paperwidth-\fau@outer@SideBarWidthLeft,
					   ht=\dimexpr\fau@outer@TitleHeight+#8]{frametitle}%
%
\vbox to\dimexpr\fau@outer@TitleHeight+#8{%
%
% hbox for title
%
\hbox to \dimexpr\paperwidth-\fau@outer@SideBarWidthLeft{%
\begin{beamercolorbox}[dp=0cm, sep=0.0cm,left,
					   wd=\dimexpr#9\paperwidth-\fau@outer@SideBarWidthLeft,
					   ht=\dimexpr\fau@outer@TitleHeight-\fau@outer@LineWidthThick]{#1}%
\vbox to\dimexpr\dimexpr\fau@outer@TitleHeight-\fau@outer@LineWidthThick-#7{%
\ifnum#4=0%
	\usebeamerfont{frametitle}\insertframetitle\\%
	%\baselineskip=.3\fau@outer@TitleHeight%
	%
	\ifx\insertframesubtitle\empty\else%
	{\usebeamerfont{framesubtitle}\insertframesubtitle}%
	\fi%
\else%
	\includegraphicsdefault[
		width=2\fau@outer@WordMarkLeftWidth,%
		height=2\fau@outer@WordMarkLeftHeight,%
		keepaspectratio
	]{\fau@outer@WordMarkTitleLeft}%
\fi%
\vfil%
%
}%
\end{beamercolorbox}%
\hfil%
%
% insert additional logo
%
\FPeval{\fau@LogoFactor}{1-#9}%
\ifnum#4=0%
    \FPeval{\fau@WMBFactor}{0.5}%
\else%
    \FPeval{\fau@WMBFactor}{1.0}%
\fi%
%
%
\begin{beamercolorbox}[
	dp=0cm, sep=0.0cm,right,%
	wd=\dimexpr\fau@LogoFactor\paperwidth-\fau@outer@TitleSkipLeft,
	ht=\dimexpr\fau@outer@TitleHeight-\fau@outer@LineWidthThick]{#1}%
%
\vbox to\dimexpr\fau@outer@TitleHeight-\fau@outer@LineWidthThick{%
\hbox to\dimexpr\fau@LogoFactor\paperwidth-\fau@outer@TitleSkipLeft{%
\iffau@outer@InsertThirdLogo%
	\includegraphics[
		width=#5,%
		height=#6,%
		keepaspectratio%
	]{\fau@outer@ThirdLogo}%
	%\fi%
\fi%
%
\hfil
%
\iffau@outer@InsertSecondLogo%
	\includegraphics[
		width=#5,%
		height=#6,%
		keepaspectratio%
	]{\fau@outer@SecondLogo}%
	\hfil%
\fi%
%
% insert fau word mark
%
\includegraphicsdefault[width=#5,%
				        height=#6,%
				        keepaspectratio]{#3}%
}%
\vfil%
}%
%
\end{beamercolorbox}%
%
\begin{beamercolorbox}[dp=0cm, sep=0.0cm,right,%
					   wd=\fau@outer@TitleSkipLeft,%
					   ht=\dimexpr\fau@outer@TitleHeight-\fau@outer@LineWidthThick]{#1}%
\end{beamercolorbox}%
}%
%
% separation line
%
\nointerlineskip%
\begin{beamercolorbox}[dp=0cm,left,sep=0cm,
					   wd=\dimexpr\paperwidth-\fau@outer@SideBarWidthLeft, 
					   ht=\fau@outer@LineWidthThick]{#2}%
\end{beamercolorbox}%
%
% Line height offset
%
\nointerlineskip%
\begin{beamercolorbox}[dp=0cm, sep=0.0cm,right,%
					   wd=\dimexpr\paperwidth-\fau@outer@SideBarWidthLeft,%
					   ht=#8]{#1}%
\end{beamercolorbox}%
}%
\end{beamercolorbox}%
}%
%
%
\defbeamertemplate{frametitle}{frametitle default}{%
\frametitlewrapper{}%1
				  {separation line}%2
				  {\fau@outer@WordMark}%3
				  {0}%4
				  {\fau@outer@WordMarkWidth}%5
				  {\fau@outer@WordMarkHeight}%6
				  {\fau@outer@TitleSkip}%7
				  {0pt}%8
				  {0.65}%9
}%
%
%
%
%
%
\defbeamertemplate{frametitle}{frametitle title}{%
\frametitlewrapper{frametitle title}%1
				  {separation line title}%2
				  {\fau@outer@WordMarkTitle}%3
				  {1}%4
				  {\fau@outer@WordMarkTitleWidth}%5
				  {\fau@outer@WordMarkTitleHeight}%6
				  {\fau@outer@TitleTitleSkip}%7
				  {\fau@outer@TitleLineHeight}%8
				  {.5}%#9
}%
%
%
\setbeamertemplate{frametitle}[frametitle default]%
%------------------------------------------------------------------------------




% ..............................................................................
% Sidebar
% -------
%
% This section specifies the behaviour of the sidbar.
% ------------------------------------------------------------------------------

\setbeamersize{sidebar width left=\fau@outer@SideBarWidthLeft}
% ------------------------------------------------------------------------------
\defbeamertemplate{sidebar left}{sidebar title theme}{%
\begin{beamercolorbox}[dp=0pt,sep=0pt,%
					   wd=\fau@outer@SideBarWidthLeft,%
					   ht=\dimexpr\paperheight-\fau@outer@FootHeight-\fau@outer@HeaderHeight]{sidebar title}%
%
\end{beamercolorbox}%
}%

\setbeamertemplate{sidebar left}{}%



% ..............................................................................
% Footline
% ------------------------------------------------------------------------------

\newcommand{\footwrapper}[2]{%
\begin{beamercolorbox}[wd=\paperwidth,ht=\fau@outer@FootHeight]{#1}%
\hbox to \paperwidth{%
\hskip\dimexpr\fau@outer@SideBarWidthLeft%
\vbox to \fau@outer@FootHeight{%
\begin{beamercolorbox}[wd=\dimexpr\paperwidth-\fau@outer@SideBarWidthLeft, 
  					   ht=\fau@outer@LineWidthThin,dp=0pt,sep=0pt]{#2}%
\end{beamercolorbox}%
\nointerlineskip%
\hbox to \dimexpr\paperwidth-\fau@outer@SideBarWidthLeft{%
%
% left side of the footer
%
\begin{beamercolorbox}[dp=0pt,sep = \fau@outer@FootLineSkip,%
					   leftskip= -\fau@outer@FootLineSkip,%
					   wd=\dimexpr.5\paperwidth-\fau@outer@SideBarWidthLeft,%
  					   ht=\dimexpr\fau@outer@FootHeight-\fau@outer@LineWidthThin]{footline}%
\ifx\insertshortinstitute\empty\else%
	\insertshortinstitute\quad%
\fi%
\ifx\insertshortauthor\empty\else%
	\insertshortauthor\quad%
\fi%
\ifx\insertshorttitle\empty\else%
	\insertshorttitle%
\fi%
%
\end{beamercolorbox}%
\hfil%
%
% rigth side of the footer
%
\begin{beamercolorbox}[dp=0pt,sep = \fau@outer@FootLineSkip,%
					   rightskip=\dimexpr\fau@outer@SideBarWidthLeft-\fau@outer@FootLineSkip,%
					   wd=\dimexpr.5\paperwidth,%
  					   ht=\dimexpr\fau@outer@FootHeight-\fau@outer@LineWidthThin]{footline}%
\hfill%
\insertdate\qquad%
\insertframenumber%
\iffau@outer@InsertTotalFoot
/\inserttotalframenumber%
\fi%
\end{beamercolorbox}%
}%
}%
}%
\end{beamercolorbox}%
}%
%
\defbeamertemplate{footline}{footline default}{%
\footwrapper{}{separation line}
}%

\defbeamertemplate{footline}{footline off}{}%

% shaded footline for title/section page
\defbeamertemplate{footline}{footline title}{%
\footwrapper{footline title}{separation line title}
}%
%
\setbeamertemplate{footline}[footline default]
% ------------------------------------------------------------------------------




% ------------------------------------------------------------------------------
\mode<all>