\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamerx}[2016/02/14 v1.0.0beta, standard scientific slideshows layout for Ecole polytechnique (Palaiseau,France).]

%=======================================================================
% Declaration des options
%=======================================================================
\ProcessOptions*
%=======================================================================
% Package requis
%=======================================================================
\RequirePackage{calc}
\RequirePackage{ifthen} % pour utiliser des booleens
% \RequirePackage{ifpdf} % mode de compilation
% \RequirePackage[pagestyles]{titlesec}
\RequirePackage{graphicx}
% \RequirePackage{geometry}
\RequirePackage{xcolor}
% \RequirePackage{lmodern}
% \RequirePackage{multicol}
% \RequirePackage{amsmath}
% \RequirePackage{amssymb}
% \RequirePackage{mathrsfs}
% \RequirePackage{eso-pic}
% \RequirePackage{transparent}
\RequirePackage{xargs}
\RequirePackage{tikz}
% \RequirePackage{stmaryrd}
\RequirePackage[hideothersubsections]{beamerthemeBerkeley}

%=======================================================================
% Definition des couleurs
%=======================================================================
\definecolor{bleu303}{RGB}{0,62,92}                
\colorlet{darkbleu303}{black!20!bleu303}           
\colorlet{lightbleu303}{white!20!bleu303}          
\colorlet{ultralightbleu303}{white!80!bleu303}     
\definecolor{rouge485}{RGB}{213,43,30}             
\colorlet{darkrouge485}{black!20!rouge485}         
\colorlet{lightrouge485}{white!20!rouge485}        
\colorlet{ultralightrouge485}{white!80!rouge485}   
\definecolor{vert575}{RGB}{107,126,81}             
\colorlet{darkvert575}{black!20!vert575}           
\colorlet{lightvert575}{white!20!vert575}          
\colorlet{ultralightvert575}{white!80!vert575}     

%=======================================================================
% Definition du theme beamer
%=======================================================================
%---------- Couleurs propres au theme
\colorlet{titlecolor}{white}
\colorlet{boxtitle}{white}
\colorlet{fgnormal}{black}
\colorlet{bgnormal}{white}
\colorlet{bglogo}{darkbleu303}
\colorlet{bdyitemize}{black!80!white}
\colorlet{sbdyitemize}{black}

%---------- Parametres generaux
\setbeamercovered{transparent=20}

\usefonttheme{professionalfonts}
\usefonttheme[stillsansseriflarge,stillsansserifsmall]{serif}

\usecolortheme[named=bleu303]{structure}

%---------- Barre laterale
\setbeamertemplate{sidebar canvas left}[default]
\addtobeamertemplate{sidebar left}{}{%
    \raisebox{1mm}{%
        \makebox[16mm]{%
            \color{white}%
            \usebeamerfont{page number in head/foot}%
            \insertframenumber/\inserttotalframenumber%
        }%
    }%
}
\setbeamercolor{sidebar left}{bg=bleu303}
\setbeamercolor{title in sidebar}{fg=white}
\setbeamercolor{author in sidebar}{fg=white}
\setbeamercolor{subsection in sidebar}{bg=lightbleu303,fg=white}
\setbeamercolor{section in sidebar}{bg=lightbleu303,fg=white}

%---------- Couleurs generales
\setbeamercolor{title}{fg=titlecolor}
\setbeamercolor{normal text}{fg=fgnormal,bg=bgnormal}               
\setbeamercolor{alerted text}{fg=rouge485}                          
\setbeamercolor{logo}{bg=bglogo}                                    
\setbeamercolor{itemize/enumerate body}{fg=bdyitemize}              
\setbeamercolor{itemize/enumerate subbody}{fg=sbdyitemize}          
\setbeamertemplate{itemize item}[circle]                            
\setbeamertemplate{itemize subitem}[triangle]                       
\setbeamertemplate{enumerate item}[square]                          
\setbeamertemplate{enumerate subitem}[circle]                       
\setbeamertemplate{navigation symbols}{}                            
\setbeamertemplate{blocks}[shadow=false]                            
\setbeamercolor{block title}{bg=bleu303,fg=boxtitle}                
\setbeamercolor{block body}{bg=ultralightbleu303,fg=black}          
\setbeamercolor{block title alerted}{bg=rouge485,fg=boxtitle}       
\setbeamercolor{block body alerted}{bg=ultralightrouge485,fg=black} 
\setbeamercolor{block title example}{bg=vert575,fg=boxtitle}        
\setbeamercolor{block body example}{bg=ultralightvert575,fg=black}  

%=======================================================================
% Commandes de mise en page utilisateur
%=======================================================================
%---------- Informations sur le document
\def\polytitresave{}
\def\polysoustitresave{}
\def\polyauteursave{}
\def\polydatesave{\today}
\def\polylogotitresave{}
\def\polylogopersosave{}

%---------- Mise en page
\let\oldtitle=\title
\renewcommandx\title[3][1={},3={}]{
    % use: \title[sous-titre]{titre}[titre court]
    \renewcommand\polytitresave{#2}
    \renewcommand\polysoustitresave{#1}
    \oldtitle[#3]{#2}
    \subtitle{#1}
}

\let\oldauthor=\author
\renewcommandx\author[2][1={}]{
    % use: \author[auteur court]{auteur}
    \renewcommand\polyauteursave{#2}
    \oldauthor{\rmfamily\bfseries #1}
}

% \let\olddate=\date
\renewcommand\date[1]{
    \renewcommand\polydatesave{#1}
}

\let\oldlogo=\logo
\renewcommand\logo[1]{
    \renewcommand\polylogopersosave{
        \includegraphics[width=30mm,height=14mm,keepaspectratio]{#1}
    }
}

\oldlogo{%
    \hspace*{\paperwidth}%
    \hspace*{-16mm}%
    \makebox[\paperwidth]{%
        \makebox[16mm]{%
            \includegraphics[height=14mm]{beamerxwhitelogo}%
        }%
        \hfill%
        \makebox[32mm][r]{%
            \polylogopersosave{}%
        }%
        \hspace*{1mm}%
    }%
}

%---------- Maketitle
\AtBeginDocument{
    \renewcommand\maketitle{
        {
            \setlength{\unitlength}{0.1\paperheight}
            \setbeamertemplate{background canvas}{%
                \color{white}%
                \begin{picture}(10,10)% fond
                    \includegraphics[height=\paperheight,keepaspectratio]{beamerxbackground}
                \end{picture}%
                \hspace*{-\paperheight}
                \begin{minipage}[b]{\paperwidth}\sffamily
                    \footnotesize \hspace*{0mm}\raisebox{1mm}{\polyauteursave}\hspace*{\fill}\raisebox{1mm}{\polydatesave{}}\hspace*{3mm}
                \end{minipage}
                \hspace*{-\paperwidth}
                \tikz\node[remember picture, overlay, right] at (current page.west) {\includegraphics[height=0.33\paperheight]{beamerxwhitelogo}};
            }%
            \begin{frame}[plain,c]
                \color{white}
                \begin{flushright}\sffamily
                    \begin{picture}(9,6)
                        \put(0,2.95){% titre
                            \makebox(9,3.05)[br]{%
                                $\text{%
                                    \bfseries%
                                    \begin{minipage}{9\unitlength}%
                                        \Large%
                                        \setlength{\baselineskip}{0.7\baselineskip}%
                                        \begin{flushright}%
                                            \polytitresave%
                                        \end{flushright}%
                                    \end{minipage}%
                                }$%
                            }%
                        }
                        \put(0,0){% sous-titre
                            \makebox(9,2.75)[tr]{%
                                $\text{%
                                    \begin{minipage}{9\unitlength}%
                                        \setlength{\baselineskip}{0.7\baselineskip}%
                                        \begin{flushright}%
                                            \polysoustitresave%
                                        \end{flushright}%
                                    \end{minipage}%
                                }$%
                            }%
                        }
                    \end{picture}
                \end{flushright}
            \end{frame}
        }
    }
    \setbeamertemplate{background canvas}{}
}