head.tex

\documentclass[\MODE]{beamer}
\usepackage{listings}
\usepackage{pstricks, pst-node}
\usepackage{xifthen}

\mode<presentation>{
	\definecolor{accentcolor}{rgb}{0.94, 0.31, 0.22}
	\definecolor{codecolor}{rgb}{0.95, 0.95, 0.95}
	\setbeamercolor{synopsiscolor}{fg=accentcolor, bg=codecolor}
}

\mode<handout>{
	\definecolor{accentcolor}{rgb}{0, 0, 0}
	\definecolor{codecolor}{rgb}{1, 1, 1}
	\setbeamercolor{synopsiscolor}{fg=black, bg=white}
}

\setbeamercolor{item}{fg=accentcolor}
\setbeamercolor*{frametitle}{fg=accentcolor}
\setbeamertemplate{navigation symbols}{}
\newcommand{\code}[1]{\colorbox{codecolor}{\lstinline{#1}}}

\lstset{
	language=,
	columns=fullflexible,
	basicstyle=\sffamily,
	showstringspaces=false,
	backgroundcolor=\color{codecolor},
	escapechar=\%,
}

% enable to remove psgrid output
%\let\psgrid\relax

\psset{xunit=1cm, yunit=1cm, gridlabels=6pt, gridcolor=gray, griddots=10, subgriddiv=1, gridlabelcolor=gray}

% FIXME: should define set of standard colours to use with pstricks illustrations
% FIXME: should define macro to center and open pspicture environment

\newcommand{\pipe}{$|$}

\newcommand{\debugpsgrid}{}
%\newcommand{\debugpsgrid}{\psgrid}

\newrgbcolor{gitdefault}{0.89 0.43 0.20}
\newrgbcolor{gitshaded}{0.6 0.6 0.6}

% [display-name]{x}{y}{name}
\newcommand{\gitcommit}[4][]{%
	\ifthenelse{\isempty{#1}}{%
		\cnode[fillstyle=solid, fillcolor=gitdefault](#2, #3){0.3}{#4}%
		\rput(#2, #3){#4}
	}{%
		\cnode[fillstyle=solid, fillcolor=gitdefault](#2, #3){0.3}{#4}%
		\rput(#2, #3){#1}
	}
}

% [display-name]{x}{y}{name}
\newcommand{\gitcommitshaded}[4][]{%
	\ifthenelse{\isempty{#1}}{%
		\cnode[linecolor=gitshaded](#2, #3){0.3}{#4}%
		\rput(#2, #3){{\gitshaded #4}}
	}{%
		\cnode[linecolor=gitshaded](#2, #3){0.3}{#4}%
		\rput(#2, #3){{\gitshaded #1}}
	}
}

\newcommand{\gitparent}[2]{%
	\ncline{->}{#1}{#2}
}

\newcommand{\gitparentshaded}[2]{%
	\ncline[linecolor=gitshaded]{->}{#1}{#2}
}

\newcommand{\gitbranch}[2]{%
	\ncarc[arcangle=16]{->}{#1}{#2}
}

\newcommand{\gitbranchshaded}[2]{%
	\ncarc[arcangle=16, linecolor=gitshaded]{->}{#1}{#2}
}

\newcommand{\gittag}[4]{%
	\rput(#1, #2){\rnode{tag#3}{\psframebox{#3}}}%
	\ncline[nodesep=0.4mm]{tag#3}{#4}
}

\newcommand{\gittagshaded}[4]{%
	\rput(#1, #2){\rnode{tagshaded#3}{\psframebox[linecolor=gitshaded]{{\gitshaded #3}}}}%
	\ncline[nodesep=0.4mm, linecolor=gitshaded]{tagshaded#3}{#4}
}

\begin{document}