% LaTeX Beamer outer theme "wuerzburg"
%
% Copyright Christian Gogolin 2011 (beamer@cgogolin.de)
%
% http://www.cgogolin.de
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program.  If not, see <http://www.gnu.org/licenses/>.
%
%   features: - Two info lines at the head and at the bottom
%               that provide information similar to the "infolines" outer
%               theme.
%             - An optional "polished" look (activated by the [glossy]
%               option).
%             - Drop shadows to separate the head/foot line and the
%               frametitle from the frame content.
%             - Suppresses the shadow on and below the frame title if
%               the "frametitle" color is not set and thus respects the
%               intention of some color themes to make the frame title
%               appear as a part of the frame content.
%             - A condensed frame title, that leaves more space for the
%               frame content.
%             - Vertical bars that separate the the items in the head/foot
%               line that can be deactivated by specifying the
%               [noseperators] option.
%             - Exclude frames (for example supplementary material in the 
%               appendix) from the total number of frames by specifying the
%               [lastframe=] option.
%             - The [nofootline] option can be used to suppress drawing of 
%               the foot line.
%
%   problems: - The glossy style does not fit well with all color themes.
%             - This theme does not work well with the "inmargin" inner
%               theme. The dropshadow of the frame title is to long.
%               (I think this could be fixed.)

\newif\ifbeamer@wuerzburg@glossy
\DeclareOptionBeamer{glossy}[true]{\csname beamer@wuerzburg@glossy#1\endcsname}

\newif\ifbeamer@wuerzburg@nofootline
\DeclareOptionBeamer{nofootline}[true]{\csname beamer@wuerzburg@nofootline#1\endcsname}

\newif\ifbeamer@wuerzburg@noseperators
\DeclareOptionBeamer{noseperators}[true]{\csname beamer@wuerzburg@noseperators#1\endcsname}

\newcounter{lastframecounter}
\DeclareOptionBeamer{lastframe}{\setcounter{lastframecounter}{#1}}
%\ExecuteOptionsBeamer{\setcounter{lastframecounter}{0}}


\ProcessOptionsBeamer

\mode<presentation>

\setbeamercolor*{headfoot}{parent=palette tertiary}

\AtBeginDocument{

  \pgfdeclareverticalshading{beamer@topshade}{\paperwidth}{%
    color(0pt)=(bg);
    color(1pt)=(black!55!bg);
    color(3pt)=(black!70!bg)}
  \pgfdeclareverticalshading{beamer@bottomshade}{\paperwidth}{%
    color(0pt)=(black!40!bg);
    color(1pt)=(bg)}
  {\usebeamercolor{frametitle}
    \pgfdeclareverticalshading{beamer@frametitletopmshade}{\paperwidth}{%
      color(0pt)=(bg);
      color(1.5pt)=(black!75!bg)}}
  \pgfdeclareverticalshading{beamer@frametitlebottomshade}{\paperwidth}{%
    color(0pt)=(bg);
    color(1.5pt)=(black!75!bg)}
  {\usebeamercolor{headfoot}\usebeamerfont{author in head/foot}
    \pgfdeclareverticalshading{beamer@headfootshade}{\paperwidth}{%
      color(0.0ex)=(black!30!bg);
      color(0.8ex)=(black!20!bg);
      color(1.0ex)=(bg);
      color(1.2ex)=(white!10!bg);
      color(2.0ex)=(white!20!bg)}}

  \newcommand{\beamerwuerzburgthemeadddelimiter}[1]{%
    \setbox\beamer@tempbox=\hbox{#1}%
    \ifdim\wd\beamer@tempbox>1pt%
    \ifbeamer@wuerzburg@noseperators%
    \hskip1.5ex
    \else%
    {\usebeamercolor[fg]{frametitle}\textbar}
    \fi
    #1
    \fi%
  }
}

\defbeamertemplate*{footline}{wuerzburg theme}
{
  \ifbeamer@wuerzburg@nofootline
  \else
  \leavevmode%
  \pgfuseshading{beamer@bottomshade}
  \ifbeamer@wuerzburg@glossy%
    \pgfuseshading{beamer@headfootshade}
    \vskip-3.5ex
    \hbox{%
      \begin{beamercolorbox}[wd=\paperwidth,ht=2.25ex,dp=1ex,left,ignorebg]{headfoot}%
        {\usebeamerfont{author in head/foot}\hspace*{3.5ex}\insertshortauthor{} \beamerwuerzburgthemeadddelimiter{\insertshortinstitute} \beamerwuerzburgthemeadddelimiter{\insertshortdate}}
      \end{beamercolorbox}\hspace{-12ex}%
      \begin{beamercolorbox}[wd=12ex,ht=2.25ex,dp=1ex,right,ignorebg]{headfoot}%
        {\usebeamerfont{date in head/foot}
%        \insertframenumber{} / \inserttotalframenumber \hspace*{3.5ex} 
        \insertframenumber{} / \if\thelastframecounter0\inserttotalframenumber\else\thelastframecounter\fi \hspace*{3.5ex}}
      \end{beamercolorbox}}
  \else%
    \hbox{%
      \begin{beamercolorbox}[wd=\paperwidth,ht=2.25ex,dp=1ex,left]{headfoot}%
        {\usebeamerfont{author in head/foot}\hspace*{3.5ex}\insertshortauthor{} \beamerwuerzburgthemeadddelimiter{\insertshortinstitute} \beamerwuerzburgthemeadddelimiter{\insertshortdate}}
      \end{beamercolorbox}\hspace{-12ex}%
      \begin{beamercolorbox}[wd=12ex,ht=2.25ex,dp=1ex,right]{headfoot}%
        {\usebeamerfont{date in head/foot}
%        \insertframenumber{} / \inserttotalframenumber\hspace*{3.5ex} 
        \insertframenumber{} / \if\thelastframecounter0\inserttotalframenumber\else\thelastframecounter\fi \hspace*{3.5ex}}
      \end{beamercolorbox}}
    \fi%
  \vskip0pt%
  \fi
}

\defbeamertemplate*{headline}{wuerzburg theme}
{
  \leavevmode%
  \ifbeamer@wuerzburg@glossy%
    \pgfuseshading{beamer@headfootshade}
    \vskip-3.5ex
    \hbox{%
      \begin{beamercolorbox}[wd=1.0\paperwidth,ht=2.25ex,dp=1ex,left,ignorebg]{headfoot}%
        \usebeamerfont{section in head/foot}\hspace*{3.5ex}%
        \insertshorttitle\ %
        \beamerwuerzburgthemeadddelimiter{\insertsection}%
        \beamerwuerzburgthemeadddelimiter{\insertsubsection}%
        \beamerwuerzburgthemeadddelimiter{\insertsubsubsection}%
      \end{beamercolorbox}%
      \ifbeamer@wuerzburg@nofootline%
      \hspace{-12ex}%
      \begin{beamercolorbox}[wd=12ex,ht=2.25ex,dp=1ex,right,ignorebg]{headfoot}%
        {\usebeamerfont{date in head/foot}
          % \insertframenumber{} / \inserttotalframenumber \hspace*{3.5ex} 
          \insertframenumber{} / \if\thelastframecounter0\inserttotalframenumber\else\thelastframecounter\fi \hspace*{3.5ex}}
      \end{beamercolorbox}\fi}%
  \else%
    \hbox{%
      \begin{beamercolorbox}[wd=1.0\paperwidth,ht=2.25ex,dp=1ex,left]{headfoot}%
        \usebeamerfont{section in head/foot}\hspace*{3.5ex}%
        \insertshorttitle\ %
        \beamerwuerzburgthemeadddelimiter{\insertsection}%
        \beamerwuerzburgthemeadddelimiter{\insertsubsection}%
        \beamerwuerzburgthemeadddelimiter{\insertsubsubsection}%
      \end{beamercolorbox}%
      \ifbeamer@wuerzburg@nofootline%
      \hspace{-12ex}%
      \begin{beamercolorbox}[wd=12ex,ht=2.25ex,dp=1ex,right,ignorebg]{headfoot}%
        {\usebeamerfont{date in head/foot}
          % \insertframenumber{} / \inserttotalframenumber \hspace*{3.5ex} 
          \insertframenumber{} / \if\thelastframecounter0\inserttotalframenumber\else\thelastframecounter\fi \hspace*{3.5ex}}
      \end{beamercolorbox}\fi}%
  \fi%
  \vskip0pt%
  \pgfuseshading{beamer@topshade}
  \vskip-3pt
}

\defbeamertemplate*{frametitle}{wuerzburg theme}[1][left]
{
  \nointerlineskip
  \ifbeamercolorempty[bg]{frametitle}{\vskip0.5ex}{%
    \hbox to\textwidth{\hskip-\Gm@lmargin\pgfuseshading{beamer@frametitletopmshade}\hskip-\Gm@rmargin}
    \nointerlineskip%
  }%
  \@tempdima=\textwidth%
  \advance\@tempdima by\beamer@leftmargin%
  \advance\@tempdima by\beamer@rightmargin%
  \begin{beamercolorbox}[sep=0.3cm,#1,wd=\the\@tempdima]{frametitle}
    \usebeamerfont{frametitle}%
    \vbox{}\vskip-1.7ex%
    \if@tempswa\else\csname beamer@fte#1\endcsname\fi%
    \strut\insertframetitle\strut\par%
    {%
      \ifx\insertframesubtitle\@empty%
      \else%
      {\usebeamerfont{framesubtitle}\usebeamercolor[fg]{framesubtitle}\insertframesubtitle\strut\par}%
      \fi
    }%
    \vskip-1.3ex%
    \if@tempswa\else\vskip-.3cm\fi% set inside beamercolorbox... evil here...
  \end{beamercolorbox}%
  \nointerlineskip
  \ifbeamercolorempty[bg]{frametitle}{}{%
    \hbox to\textwidth{\hskip-\Gm@lmargin\pgfuseshading{beamer@frametitlebottomshade}\hskip-\Gm@rmargin}%
    \vskip-1.5pt%
  }%
}

\setbeamersize{text margin left=1em,text margin right=1em}

\mode
<all>