% \iffalse meta-comment -------------------------------------------------------
% Copyright (C) 2021 Thomas Lambert <trigon@thl.ovh>
% Other contributors to this theme are listed here:
%     https://gitlab.com/thlamb/beamertheme-trigon/-/graphs/master
%
% The original template was heavily inspired by Metropolis from Matthias
% Vogelgesang.
%
% License CC-BY-SA 4.0
% This work is licensed under a Creative Commons Attribution-ShareAlike 4.0
% International License (https://creativecommons.org/licenses/by-sa/4.0/)
% ------------------------------------------------------------------------- \fi
% \iffalse
%<*package>
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamercolorthemetrigon}[2022/03/19 v0.6.4 Trigon color theme]
%</package>
% \fi
% \CheckSum{0}
% \StopEventually{}
% \iffalse
%<*package>
% ------------------------------------------------------------------------- \fi
%
% \subsection{\themename color theme}
%
% A |beamer| color theme sets the colors used for the different elements of the
% document.
%
% \subsubsection{Package dependencies}
%    \begin{macrocode}
\RequirePackage{pgfopts}
%    \end{macrocode}
%
% \subsubsection{Options}
%
% \begin{macro}{colors}
%  Provides the option to have a dark background and light foreground instead
%  of the reverse.
%    \begin{macrocode}
\pgfkeys{
  /trigon/color/background/.cd,
  .is choice,
  dark/.code=\trigon@colors@dark,
  light/.code=\trigon@colors@light
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{headingcolor}
% Select the color to use for all headings (title, section, frame, etc.).
%    \begin{macrocode}
\def\headcol{tDefaulttxt}
\pgfkeys{
  /trigon/color/headingcolor/.cd,
  .is choice,
  default/.code=\def\headcol{tTxt},
  theme/.code=\def\headcol{tPrim}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{textcolor}
% Select the color to use for all headings (title, section, frame, etc.).
%    \begin{macrocode}
\def\txtcol{black}
\pgfkeys{
  /trigon/color/textcolor/.cd,
  .is choice,
  default/.code=\def\txtcol{tTxt},
  theme/.code=\def\txtcol{tPrim!50!tTxt}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{block}
% Optionally removes the light grey background to block environments like
% |theorem| and |example|.
%    \begin{macrocode}
\pgfkeys{
  /trigon/color/block/.cd,
  .is choice,
  transparent/.code=\trigon@block@transparent,
  fill/.code=\trigon@block@fill
}
%
% \begin{macro}{\trigon@color@setdefaults}
% Sets default values for color theme options.
%    \begin{macrocode}
\newcommand{\trigon@color@setdefaults}{
  \pgfkeys{/trigon/color/.cd,
    background=light,
    block=fill,
    headingcolor=default,
    textcolor=default
  }
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Base colors}
%
%    \begin{macrocode}
\definecolor{tGreenBlue}{HTML}{00707F}
\definecolor{tGreenBlueLight}{HTML}{5FA4B0}
\definecolor{tOrange}{HTML}{F07F3C}
\definecolor{tYellowOrange}{HTML}{F8AA00}
\definecolor{tBeigePale}{HTML}{E6E6E1}
\definecolor{tBeige}{HTML}{C6C0B4}
\definecolor{tDarkBg}{HTML}{232931}
\definecolor{tDarkFg}{HTML}{EEEEEE}
\definecolor{tLightBg}{HTML}{FFFFFF}
%    \end{macrocode}
%
% \subsubsection{Derived elements}
%
% All the elements are set using the base colors defined here above.
%    \begin{macrocode}
\newcommand{\trigon@colors@dark}{
  \colorlet{tPrim}{tGreenBlueLight}
  \colorlet{tSec}{tGreenBlue}
  \colorlet{tAccent}{tYellowOrange}
  \colorlet{tTxt}{tDarkFg}
  \colorlet{tBg}{tDarkBg}
  \colorlet{tGreyBg}{tGrey!7!tBg}
}
\newcommand{\trigon@colors@light}{
  \colorlet{tPrim}{tGreenBlue}
  \colorlet{tSec}{tGreenBlue}
  \colorlet{tAccent}{tOrange}
  \colorlet{tTxt}{black}
  \colorlet{tBg}{tLightBg}
  \colorlet{tGreyBg}{tGrey!25!tBg}
}
\colorlet{tGrey}{tBeige}
\colorlet{tTheme}{tGreenBlue}
\setbeamercolor{background canvas}{bg=tBg}
\setbeamercolor{normal text}{fg=\txtcol, bg=tBg}
\setbeamercolor{example text}{fg=tPrim}
\setbeamercolor{alerted text}{fg=tAccent}

\setbeamercolor{title}{fg=\headcol, bg= , parent=normal text}
\setbeamercolor{titlelike}{use=title, parent=title}
\setbeamercolor{author}{use=normal text, bg= , parent=normal text}
\setbeamercolor{date}{use=normal text, bg= , parent=normal text}
\setbeamercolor{institute}{use=normal text, parent=normal text}
\setbeamercolor{structure}{use=normal text, fg=normal text.fg}

\setbeamercolor{palette primary}{use=titlelike, parent=titlelike}
\setbeamercolor{frametitle}{use=titlelike, parent=titlelike}
%    \end{macrocode}
%
%
% Block environments such as |theorem| and |example| have a grey-tinted background
% color by default. The option |block=transparent| removes the background color.
%    \begin{macrocode}
\newcommand{\trigon@block@transparent}{
  \setbeamercolor{block title}{%
    use=normal text,
    fg=normal text.fg,
    bg=normal text.bg!96!fg
  }
  \setbeamercolor{block body}{
    use={block title, normal text},
    bg=block title.bg!35!normal text.bg
  }
}
\newcommand{\trigon@block@fill}{
  \setbeamercolor{block title}{%
    use=normal text,
    fg=normal text.fg,
    bg=normal text.bg!80!normal text.fg
  }
  \setbeamercolor{block body}{
    use={block title, normal text},
    bg=block title.bg!50!normal text.bg
  }
}

\setbeamercolor{block title alerted}{%
  use={block title, alerted text},
  bg=block title.bg,
  fg=alerted text.fg
}
\setbeamercolor{block title example}{%
  use={block title, example text},
  bg=block title.bg,
  fg=example text.fg
}
\setbeamercolor{block body alerted}{use=block body, parent=block body}
\setbeamercolor{block body example}{use=block body, parent=block body}
%    \end{macrocode}
%
% The color of other smaller elements is defined as follows
%    \begin{macrocode}
\setbeamercolor{footnote}{fg=normal text.fg!90!normal text.bg}
\setbeamercolor{footnote mark}{fg=.}
\setbeamercolor{footline}{fg=normal text.fg!50!normal text.bg, parent=normal text}
\setbeamercolor{caption}{fg=normal text.fg!60!normal text.bg, parent=normal text}

\setbeamercolor{itemize item}{use=example text, parent=example text}
\setbeamercolor{itemize subitem}{use=itemize item, parent=itemize item}
\setbeamercolor{itemize subsubitem}{use=itemize item, parent=itemize item}
\setbeamercolor{enumerate item}{use=example text, parent=example text}
\setbeamercolor{enumerate subitem}{use=enumerate item, parent=enumerate item}
\setbeamercolor{enumerate subsubitem}{use=enumerate item, parent=enumerate item}
\setbeamercolor{description item}{use=example text, parent=example text}
%    \end{macrocode}
%
% \subsubsection{Process package options}
%
%    \begin{macrocode}
\trigon@color@setdefaults
\ProcessPgfPackageOptions{/trigon/color}
%    \end{macrocode}
%
% \iffalse
%</package>
% \fi
% \Finale
\endinput
