% Copyright (c) 2019-2021 Takahiro Ueda
%
% This file may be distributed and/or modified under the conditions of
% the LaTeX Project Public License (LPPL), either version 1.3c of this
% license or (at your option) any later version. The latest version of
% this license is in:
%
%    http://www.latex-project.org/lppl.txt
%
% The latest version can be found in the following repository:
%
%    https://github.com/tueda/beamertheme-naive
%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{beamerthemenaive}[2021/10/26 v0.1f naive beamer theme]

\mode<presentation>

\RequirePackage{anyfontsize}
\RequirePackage{appendixnumberbeamer}
\RequirePackage{bookmark}
\RequirePackage{etoolbox}
\RequirePackage{graphicx}
\RequirePackage{ifluatex}
\RequirePackage{ifpdf}
\RequirePackage{ifthen}
\RequirePackage{ifxetex}
\RequirePackage{tikz}
\RequirePackage{xcolor}

%{{{ Flags

% Flag for (u)p(La)TeX.
\newboolean{naive@ptex}%
\@ifundefined{dtou}{%
  \setboolean{naive@ptex}{false}%
}{%
  \setboolean{naive@ptex}{true}%
}%

% Flag for up(La)TeX.
\newboolean{naive@uptex}%
\@ifundefined{ucs}{%
  \setboolean{naive@uptex}{false}%
}{%
  \setboolean{naive@uptex}{true}%
}%

% Flag for dvipdfmx.
\newboolean{naive@dvipdfmx}
\setboolean{naive@dvipdfmx}{false}

% Flag for Japanese slides.
\newboolean{naive@japanese}
\setboolean{naive@japanese}{false}
\ifthenelse{\boolean{naive@ptex}}{%
  \setboolean{naive@japanese}{true}%
}%

% Flag for checking environment variables.
\newboolean{naive@env}
\setboolean{naive@env}{false}

% Name of the color theme to be used.
\newcommand{\naive@colortheme}{none}

% Flag for the font theme (non-empty of empty).
\newcommand{\naive@font}{1}

%}}}
%{{{ Options

% Use dvipdfmx as the driver.
\DeclareOption{dvipdfmx}{%
  \setboolean{naive@dvipdfmx}{true}%
}
% Use settings for Japanese documents.
\DeclareOption{japanese}{%
  \setboolean{naive@japanese}{true}%
}
% Use environment variables as extra (dynamic) options.
\DeclareOption{env}{%
  \setboolean{naive@env}{true}%
}
% Do not change the color theme.
\DeclareOption{nocolor}{%
  \renewcommand{\naive@colortheme}{nocolor}%
}
% Use the "light" color theme.
\DeclareOption{light}{%
  \renewcommand{\naive@colortheme}{light}%
}
% Use the "dark" color theme.
\DeclareOption{dark}{%
  \renewcommand{\naive@colortheme}{dark}%
}
% Do not change the font theme.
\DeclareOption{nofont}{%
  \let\naive@font\@empty
}
\ExecuteOptions{light}
\ProcessOptions\relax

%}}}
%{{{ Patches

\ifthenelse{\boolean{naive@env}}{%
  \AtEndPreamble{%
    % Handle the FRAME environment variable.
    % If FRAME is not empty, then pass it to \includeonlyframes.
    % Note that labels of frames are automatically generated in below.
    \GetEnv{\GetEnv@FRAME}{FRAME}%
    \ifx\GetEnv@FRAME\empty
    \else
      \expandafter\includeonlyframes\expandafter{\GetEnv@FRAME}%
    \fi
  }%
}{}%

% \naive@patchfail{command-name}
\newcommand{\naive@patchfail}[1]{%
  \PackageError{beamerthemenaive}{Failed to patch \protect#1}{Sorry!}%
}

% Override \maketitle.
\renewcommand{\maketitle}{%
  \ifbeamer@inframe
    \titlepage
  \else
    \frame[plain,noframenumbering]{\titlepage}%
  \fi
}

% Automatically put a "section page" for each section.
\AtBeginSection{%
  \ifbeamer@inframe
    \sectionpage
  \else
    \frame[plain,c,noframenumbering]{%
      \sectionpage
    }%
  \fi
}

% Fix \appendix.
\renewcommand{\appendixname}{Backup}% removes a pdf warning
\renewcommand{\appendixtotalframenumber}{0}% ensures 0, not empty as in old versions
\newcommand{\footpagenumberingprefix}{}
\apptocmd{\appendix}{%
  \renewcommand{\footpagenumberingprefix}{Appendix - }%
% Add a "section page" for the appendix.
  \section{\appendixname}%
}{}{\naive@patchfail{\appendix}}%
\renewcommand\appendixorig{}% in appendixnumberbeamer

% Put an unique default label (the frame number) to each frame.
% In appendix, they are A1, A2 etc. Frames without numbering get some suffixes.
% See https://tex.stackexchange.com/a/316015
\newcounter{naive@noframenumbering}
\patchcmd{\beamer@@@@frame}{%
  \setkeys{beamerframe}{#2}%
}{%
  \setkeys{beamerframe}{#2}%
  \edef\theframe{\number\numexpr\value{framenumber}+1}%
  \ifnum\mainend>0%  from appendixnumberbeamer
    \edef\theframe{A\theframe}%
  \fi
  \ifbeamer@noframenumbering
    \edef\thelabel{\theframe.\arabic{naive@noframenumbering}}%
    \stepcounter{naive@noframenumbering}%
  \else
    \edef\thelabel{\theframe}%
    \setcounter{naive@noframenumbering}{0}%
  \fi
% \message{framelabel=(\thelabel)}% debug
  \edef\@xargs{{beamerframe}{label=\thelabel}}%
  \expandafter\setkeys\@xargs
}{}{\naive@patchfail{\beamer@@@@frame}}%

% Make PDF bookmarks.
% See https://tex.stackexchange.com/a/66520
\apptocmd{\titlepage}{%
  \only<1>{\bookmark[page=\the\c@page,level=1]{\inserttitle}}%
}{}{\naive@patchfail{\titlepage}}%
\apptocmd{\beamer@@frametitle}{%
  \if\relax\detokenize{#1}\relax
  \else
    \only<1>{\bookmark[page=\the\c@page,level=3]{#1}}%
  \fi
}{}{\naive@patchfail{\beamer@@frametitle}}%

% "Rerun LaTeX" message when the number of slides is changed.
\AtEndDocument{%
  \ifnum\value{framenumber}=\inserttotalframenumber
  \else
    \@latex@warning@no@line{Total frame number changed.%
      \MessageBreak Rerun to get the number correct}%
  \fi
}

% See https://github.com/gdevenyi/phd_thesis/blob/master/presentation/fixpauseincludegraphics.sty
\newcommand{\transparent@value}{100}
\newcommand{\oldincludegraphics}{}
\let\oldincludegraphics\includegraphics
\renewcommand*{\includegraphics}[2][]{%
  \ifcsname tikz@library@external@loaded\endcsname
    \tikzset{external/export next=false}%
  \fi
  \begin{tikzpicture}%
    {\node[opacity=\transparent@value/100] {\oldincludegraphics[#1]{#2}};}%
  \end{tikzpicture}%
}
% override of the original beamer@mixin transparent
\define@key{beamer@mixin}{transparent}[15]{%
    \def\beamer@uncoverbeforeactions{\ignorespaces\opaquenessCustom{#1}}%
    \def\beamer@uncoverafteractions{\ignorespaces\opaquenessCustom{#1}}%
}
% mostly a copy-and-paste of the original code from beamerbaseoverlay.sty
\newcommand{\opaquenessCustom}[1]{%
  \only<1->{%
    \beamer@actions{%
      \gdef\transparent@value{#1}% here we change the custom transparency according to the pauses
      \expandafter\xdef\csname beamer@oldcolorhook%
      \the\beamer@coveringdepth\endcsname{\beamer@colorhook}%
      \expandafter\xdef\csname beamer@oldpgfextension%
      \the\beamer@coveringdepth\endcsname{\beamer@pgfextension}%
      {\globalcolorstrue\colorlet{beamer@freeze\the\beamer@coveringdepth}{bg}}%
      \xdef\beamer@colorhook{!#1!beamer@freeze%
        \the\beamer@coveringdepth\beamer@colorhook}%
      \gdef\beamer@pgfextension{!#1opaque}%
      \color{.}%
    }%
    {%
      \gdef\transparent@value{100}% here we initialize our custom transparency
      \xdef\beamer@colorhook{\csname beamer@oldcolorhook%
      \the\beamer@coveringdepth\endcsname}%
      \xdef\beamer@pgfextension{\csname beamer@oldpgfextension%
      \the\beamer@coveringdepth\endcsname}%
      \color{.}%
    }%
  }%
}%

% For dvipdfmx.
\ifthenelse{\boolean{naive@dvipdfmx}}{%
  \RequirePackage{bxdpx-beamer}%
  % Fix href + includegraphics in dvipdfmx
  % We need some bounding box: https://ja.stackoverflow.com/a/69667
  % cf. https://tex.stackexchange.com/a/85103
  \newcommand{\@naive@old@href}{}%
  \let\@naive@old@href\href
  \newcommand{\@naive@old@includegraphics}{}%
  \let\@naive@old@includegraphics\includegraphics
  \newcommand{\@naive@new@includegraphics}[2][]{%
    \bxqbd@enghost{\@naive@old@includegraphics[#1]{#2}}%
  }%
  \renewcommand{\href}[2]{%
    {%
      \let\includegraphics\@naive@new@includegraphics
      \@naive@old@href{#1}{#2}%
    }%
  }%
}{}

% For Japanese slides.
\ifthenelse{\boolean{naive@japanese}}{%
  \ifthenelse{\boolean{luatex}}{%
    % LuaLaTeX + LuaTeX-ja
    \RequirePackage{luatexja}%
  }{%
    \ifthenelse{\boolean{xetex}}{%
      % XeLaTeX + zxjatype
      \RequirePackage{zxjatype}%
    }{%
      \ifthenelse{\boolean{pdf}}{%
        \ifthenelse{\boolean{naive@ptex}}{%
        }{%
          % pdfLaTeX + bxcjkjatype
          \RequirePackage[whole,autotilde]{bxcjkjatype}%
        }%
      }{%
        \ifthenelse{\boolean{naive@ptex}}{%
          \ifthenelse{\boolean{naive@dvipdfmx}}{%
            % (u)pLaTeX + dvipdfmx
            \RequirePackage{pxjahyper}%
          }{%
          }%
        }{%
        }%
      }%
    }%
  }%
  % Default date in Japanese.
  \IfFileExists{bxwareki.sty}{%
    \RequirePackage{bxwareki}%
    \date{\warekisettoday\warekicustomdate{}}%
  }{}%
}{}

% pdflatex segfaults when a precompiled format file contains PGF shadings,
% https://tex.stackexchange.com/q/609136.
% For the use case of mylatexformat, postpone
%   \setbeamertemplate{background canvas}[vertical shading][...]
% until the beginning of the document.
% One can also manually call \ApplyBackgroundShading after
%   \csname endofdump\endcsname
% of the idiom for mylatexformat.
\def\naive@setbeamertemplate@backgroundcanvas@verticalshading[#1]{%
  \edef\naive@current@verticalshading{#1}%
}
\def\naive@setbeamertemplate@backgroundcanvas@verticalshading@clear{%
  \let\naive@current@verticalshading\@empty
}
\newcommand{\ApplyBackgroundShading}{%
  \ifx\naive@current@verticalshading\@empty
  \else
    \edef\@tempa{%
      {background canvas}[vertical shading][\naive@current@verticalshading]%
    }%
    \expandafter\setbeamertemplate\@tempa
    \naive@setbeamertemplate@backgroundcanvas@verticalshading@clear
  \fi
}
\naive@setbeamertemplate@backgroundcanvas@verticalshading@clear
\AtBeginDocument{\ApplyBackgroundShading}

%}}}
%{{{ New commands

% \GetEnv{ctl-seq}{env-var-name} gets an environment variable.
% https://tex.stackexchange.com/a/62032
\ifthenelse{\boolean{xetex}}{%
  % NOTE: -shell-escape is necessary.
  \RequirePackage{catchfile}
  \newcommand\GetEnv[2]{%
    \immediate\write18{kpsewhich --var-value #2 > \jobname.tmp}%
    \CatchFileDef{\GetEnv@temp}{\jobname.tmp}{\endlinechar=-1}%
    \if\relax\detokenize{#1}\relax\GetEnv@temp\else\let#1\@GetEnv@temp\fi}
}{\ifthenelse{\boolean{luatex}}{%
  % Old LuaTeX may cause a problem due to \luaescapestring vs.
  % \luatexluaescapestring.
  \newcommand\GetEnv[2]{%
    \edef\GetEnv@temp{\directlua{tex.sprint(
      kpse.var_value("\luaescapestring{#2}") or "" ) }}%
    \if\relax\detokenize{#1}\relax\GetEnv@temp\else\let#1\GetEnv@temp\fi}
}{
  \RequirePackage{catchfile}
  \newcommand{\GetEnv}[2]{%
    \CatchFileEdef{\GetEnv@temp}{"|kpsewhich --var-value #2"}{\endlinechar=-1}%
    \if\relax\detokenize{#1}\relax\GetEnv@temp\else\let#1\GetEnv@temp\fi}
}}

%}}}
%{{{ Color

% cf. https://material.io/tools/color

\definecolor{NaiveBlue}  {HTML}{1976D2}% Blue 700
\definecolor{NaiveCyan}  {HTML}{00BCD4}% Cyan 500
\definecolor{NaiveGreen} {HTML}{00695C}% Green 800
\definecolor{NaiveRed}   {HTML}{FF5252}% Red A200
\definecolor{NaiveYellow}{HTML}{F9A825}% Yellow 800

\definecolor{NaiveLightBlue}  {HTML}{E3F2FD}% Blue 50
\definecolor{NaiveLightLime}  {HTML}{F9FBE7}% Lime 50
\definecolor{NaiveLightOrange}{HTML}{FFF3E0}% Orange 50

\definecolor{NaiveDarkBrown} {HTML}{3E2723}% Brown 900
\definecolor{NaiveDarkIndigo}{HTML}{1A237E}% Indigo 900
\definecolor{NaiveDarkTeal}  {HTML}{004D40}% Teal 900

\def\naive@knownaccents{%
  NaiveBlue,%
  NaiveCyan,%
  NaiveGreen,%
  NaiveRed,%
  NaiveYellow%
}

\def\@tempa{white}
\@for\@tempb:=\naive@knownaccents\do{%
  \edef\@tempa{\@tempa,\@tempb,\@tempb!75!white}%
}
\let\naive@knownaccents\@tempa

% \ColorDistanceSq{<color1>}{<color2>}{<result-cmd>} gives the color distance
% between two colors.
\newcommand{\ColorDistanceSq}[3]{%
  \extractcolorspec{#1}{\@tempa}%
  \expandafter\convertcolorspec\@tempa{rgb}{\@tempa}%
  \extractcolorspec{#2}{\@tempb}%
  \expandafter\convertcolorspec\@tempb{rgb}{\@tempb}%
  \edef\@tempa{\@tempa,\@tempb}%
  \expandafter\@ColorDistanceSq\@tempa,{#3}%
}
\newcommand{\@ColorDistanceSq}{}
\def\@ColorDistanceSq#1,#2,#3,#4,#5,#6,#7{%
  % I found this "approximation" in Wikipedia...
  % 0.0 <= d^2 <= 9.0.
  \pgfmathsetmacro{\@tempa}{(#1+#4)/2}%
  \pgfmathsetmacro{#7}{(2+\@tempa)*(#1-#4)^2+4*(#2-#5)^2+(3-\@tempa)*(#3-#6)^2}%
}

% \FarthestColor{<candidate-list>}{<fg-list>}{<bg-list>}{<bg-factor>}{<result-cmd>}
% finds a color that are farthest from the given foreground and background
% colors. Background colors get a weight (0 < w <= 1) for the distance.
\newcommand{\FarthestColor}[5]{%
  \let\@tempc\relax
  \edef\@tempd{-1}%
  \@for\@tempe:=#1\do{%
    \ifx\@tempe\@empty
    \else
      \edef\@tempg{10}%
      \@for\@tempf:=#2\do{%
        \ifx\@tempf\@empty
        \else
          \ifdim\@tempg\p@>\@tempd\p@
            \ColorDistanceSq{\@tempe}{\@tempf}{\@temph}%
            \pgfmathsetmacro{\@tempg}{min(\@tempg,\@temph)}%
          \fi
        \fi
      }%
      \@for\@tempf:=#3\do{%
        \ifx\@tempf\@empty
        \else
          \ifdim\@tempg\p@>\@tempd\p@
            \ColorDistanceSq{\@tempe}{\@tempf}{\@temph}%
            \pgfmathsetmacro{\@tempg}{min(\@tempg,#4*\@temph)}%
          \fi
        \fi
      }%
      \ifdim\@tempg\p@>\@tempd\p@
        \let\@tempc\@tempe
        \let\@tempd\@tempg
      \fi
    \fi
  }%
  \let#5\@tempc
}

\newcommand{\naive@bgfactor}{0.25}

\newcommand{\UpdateNormalColor}{%
  % from beamerbasecolor.sty
  \usebeamercolor*{alerted text}
  \usebeamercolor*{example text}
  \usebeamercolor*{structure}
  \usebeamercolor{normal text}
  \color{fg}
  \def\normalcolor{\color{normal text.fg}}
}%

% \ChangeColorScheme{<options>} changes the color scheme for the color theme.
\pgfkeys{
  /naive/color/scheme/.cd,
  fg/.code={%
    \edef\naive@colorscheme@fg{#1}%
  },
  bg/.code={%
    \edef\naive@colorscheme@bg{#1}%
  },
  accent/.code={%
    \edef\naive@colorscheme@accent{#1}%
  },
  structure/.code={%
    \edef\naive@colorscheme@structure{#1}%
  },
  alert/.code={%
    \edef\naive@colorscheme@alert{#1}%
  },
  example/.code={%
    \edef\naive@colorscheme@example{#1}%
  },
  shading/.is choice,
  shading/none/.code={%
    \edef\naive@colorscheme@shading{}%
  },
  shading/vertical/.code={%
    \edef\naive@colorscheme@shading{vertical}%
  },
  top/.code={%
    \edef\naive@colorscheme@top{#1}%
  },
  bottom/.code={%
    \edef\naive@colorscheme@bottom{#1}%
  },
  middle/.code={%
    \edef\naive@colorscheme@middle{#1}%
  },
  midpoint/.code={%
    \edef\naive@colorscheme@midpoint{#1}%
  },
}
\newcommand{\ChangeColorScheme}[1]{%
  \pgfkeys{
    /naive/color/scheme/.cd,
    fg=black,
    bg=white,
    accent=,
    structure=,
    alert=,
    example=,
    shading=none,
    top=,
    bottom=,
    middle=,
    midpoint=0.5,
    #1
  }%

  % If the accent color is not specified, then use the foreground color for it.
  \ifx\naive@colorscheme@accent\@empty
    \let\naive@colorscheme@accent\naive@colorscheme@fg
  \fi

  % Foreground and background.

  \colorlet{NaiveForeground}{\naive@colorscheme@fg}%
  \colorlet{NaiveBackground}{\naive@colorscheme@bg}%
  \colorlet{NaiveAccent}{\naive@colorscheme@accent}%

  \edef\naive@colorscheme@fglist{NaiveForeground,NaiveAccent}%

  \ifx\naive@colorscheme@shading\@empty
    \edef\naive@colorscheme@bglist{NaiveBackground}%

    \ColorDistanceSq{NaiveBackground}{white}{\@tempa}%
    \ifdim\@tempa\p@>\z@%
      \setbeamercolor{normal text}{fg=NaiveForeground,bg=NaiveBackground}
    \else
      \setbeamercolor{normal text}{fg=NaiveForeground,bg=}
    \fi
    \setbeamertemplate{background canvas}[default]
    \naive@setbeamertemplate@backgroundcanvas@verticalshading@clear
  \else
    \edef\naive@colorscheme@bglist{}%

    \setbeamercolor{normal text}{fg=NaiveForeground,bg=}

    \ifthenelse{\equal{\naive@colorscheme@shading}{vertical}}{%
      \ifx\naive@colorscheme@top\@empty
        \let\naive@colorscheme@top\naive@colorscheme@bg
      \fi
      \ifx\naive@colorscheme@bottom\@empty
        \let\naive@colorscheme@bottom\naive@colorscheme@bg
      \fi

      \ifx\naive@colorscheme@middle\@empty
        \edef\naive@colorscheme@bglist{\naive@colorscheme@bglist,%
          \naive@colorscheme@top,%
          \naive@colorscheme@top!50!\naive@colorscheme@bottom,%
          \naive@colorscheme@bottom}%

        \naive@setbeamertemplate@backgroundcanvas@verticalshading[
          top=\naive@colorscheme@top,
          bottom=\naive@colorscheme@bottom,
          midpoint=\naive@colorscheme@midpoint,
        ]%
      \else
        \edef\naive@colorscheme@bglist{\naive@colorscheme@bglist,%
          \naive@colorscheme@top,%
          \naive@colorscheme@top!50!\naive@colorscheme@middle,%
          \naive@colorscheme@middle,%
          \naive@colorscheme@middle!50!\naive@colorscheme@bottom,%
          \naive@colorscheme@bottom}%

        \naive@setbeamertemplate@backgroundcanvas@verticalshading[
          top=\naive@colorscheme@top,
          middle=\naive@colorscheme@middle,
          bottom=\naive@colorscheme@bottom,
          midpoint=\naive@colorscheme@midpoint,
        ]%
      \fi
    }{}%
  \fi

  \ifx\naive@colorscheme@structure\@empty
  \else
    \edef\naive@colorscheme@fglist{\naive@colorscheme@fglist,\naive@colorscheme@structure}%
  \fi

  \ifx\naive@colorscheme@alert\@empty
  \else
    \edef\naive@colorscheme@fglist{\naive@colorscheme@fglist,\naive@colorscheme@alert}%
  \fi

  \ifx\naive@colorscheme@example\@empty
  \else
    \edef\naive@colorscheme@fglist{\naive@colorscheme@fglist,\naive@colorscheme@example}%
  \fi

  % If the structure color is not specified, then use the accent color for it.
  \ifx\naive@colorscheme@structure\@empty
    \colorlet{NaiveStructure}{NaiveAccent}%
  \else
    \colorlet{NaiveStructure}{\naive@colorscheme@structure}%
  \fi

  % Choose the title color. Preference is given for brighter colors (not black).
  \FarthestColor{NaiveAccent,NaiveStructure,NaiveForeground}{\naive@colorscheme@bglist}{black}{\naive@bgfactor}{\@tempa}%
  \colorlet{NaiveTitle}{\@tempa}%

  % If the alert color is not specified, then choose a color from our list.
  % Preference is given for brighter colors (not black) and reddish colors
  % (not lime).
  \ifx\naive@colorscheme@alert\@empty
    \FarthestColor{\naive@knownaccents}{\naive@colorscheme@fglist}{\naive@colorscheme@bglist}{\naive@bgfactor}{\naive@colora}%
    \FarthestColor{\naive@knownaccents}{\naive@colorscheme@fglist,\naive@colora}{\naive@colorscheme@bglist}{\naive@bgfactor}{\naive@colorb}%
    \FarthestColor{\naive@colora,\naive@colorb}{lime}{black}{\naive@bgfactor}{\@tempa}%
    \colorlet{NaiveAlert}{\@tempa}%
    \edef\naive@colorscheme@fglist{\naive@colorscheme@fglist,\@tempa}%
  \else
    \colorlet{NaiveAlert}{\naive@colorscheme@alert}%
  \fi

  % If the example color is not specified, then choose a color from our list.
  \ifx\naive@colorscheme@example\@empty
    \FarthestColor{\naive@knownaccents}{\naive@colorscheme@fglist}{\naive@colorscheme@bglist}{\naive@bgfactor}{\@tempa}%
    \colorlet{NaiveExample}{\@tempa}%
    \edef\naive@colorscheme@fglist{\naive@colorscheme@fglist,\@tempa}%
  \else
    \colorlet{NaiveExample}{\naive@colorscheme@example}%
  \fi

  \setbeamercolor{structure}{fg=NaiveStructure}%
  \setbeamercolor{alerted text}{fg=NaiveAlert}%
  \setbeamercolor{example text}{fg=NaiveExample}%
  \setbeamercolor{titlelike}{parent=structure,fg=NaiveTitle}%
  \setbeamercolor{item}{parent=local structure,fg=NaiveTitle}%

  % Need to update the current color when not in the preamble.
  \ifx\@onlypreamble\@notprerr
    \UpdateNormalColor
  \fi
}

% \ChangeColorTheme{<name>} changes the coloring to the given preset.
\newcommand{\ChangeColorTheme}[1]{%
  \@nameuse{naive@colortheme@init@#1}%
}
\newcommand{\naive@colortheme@init@nocolor}{%
}
\newcommand{\naive@colortheme@init@light}{%
  \ChangeColorScheme{%
    fg=NaiveDarkTeal!75!black,
    bg=white,
    accent=NaiveBlue,
    alert=NaiveRed,
  }%
}
\newcommand{\naive@colortheme@init@dark}{%
  \colorlet{shading top}{black}%
  \definecolor{shading middle}{rgb}{0.14,0.14,0.20}%
  \definecolor{shading bottom}{rgb}{0.39,0.39,0.45}%
  \ChangeColorScheme{%
    fg=white,
    accent=NaiveBlue!75!white,
    alert=NaiveRed!75!white,
    shading=vertical,
    top=shading top,
    bottom=shading bottom,
    middle=shading middle,
  }%
}

\ChangeColorTheme{\naive@colortheme}

%}}}
%{{{ Font

\ifx\naive@font\@empty
\else
  \RequirePackage[T1]{fontenc}
  %\RequirePackage[sfdefault]{FiraSans}
  \RequirePackage[sfdefault]{roboto}
  \beamer@suppressreplacementstrue
  \RequirePackage{fouriernc}

  \newcommand{\titlefont}{\robotocondensed}

  \ifthenelse{\boolean{naive@japanese}}{%
    \ifthenelse{\boolean{luatex}}{%
      % LuaLaTeX
      \RequirePackage[ipaex]{luatexja-preset}%
      \renewcommand{\kanjifamilydefault}{\gtdefault}%
      \renewcommand{\titlefont}{\robotocondensed\gtfamily}%
    }{%
      \ifthenelse{\boolean{xetex}}{%
        % XeLaTeX
        \RequirePackage[ipaex]{zxjafont}%
      }{%
        \ifthenelse{\boolean{naive@ptex}}{%
          \ifthenelse{\boolean{naive@uptex}}{%
          }{%
            % pLaTeX
            \usepackage{minijs}%
          }%
          % (u)pLaTeX
          \renewcommand{\kanjifamilydefault}{\gtdefault}%
          \renewcommand{\titlefont}{\robotocondensed\gtfamily}%
        }{%
        }%
      }%
    }%
  }{}

  \setbeamerfont{title}{family=\titlefont,series=\bfseries,size=\LARGE}
  \setbeamerfont{date}{size=\scriptsize}
  \setbeamerfont{frametitle}{family=\titlefont,series=\bfseries,size=\Large}
\fi

%}}}
%{{{ Outer

\setbeamertemplate{frametitle}[default][center]
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{footline}{%
  \hfill
  \footpagenumberingprefix\insertframenumber/\inserttotalframenumber
  \hspace{7pt}%
  \vspace{7pt}%
}

% Space between the title and text.
\addtobeamertemplate{frametitle}{}{\vspace*{1ex plus 1ex minus 0.5ex}}

%}}}
%{{{ Inner

% Space between paragraphs.
\setlength{\parskip}{3ex plus 2ex minus 2ex}% default: 0pt

% Use the default \parskip in the title page.
\pretocmd{\titlepage}{%
  \setlength{\parskip}{0pt}%
}{}{\naive@patchfail{\titlepage}}%

% Space between items.
\apptocmd{\@listi}{%
  \setlength{\itemsep}{\parskip}%
}{}{\naive@patchfail{\@listi}}%
\apptocmd{\@listii}{%
  \setlength{\topsep}{2ex plus 0.5ex minus 0.5ex}%
  \setlength{\itemsep}{2ex plus 1ex minus 1ex}%
}{}{\naive@patchfail{\@listii}}%
\let\@listI\@listi

% Space before/after verbatim.
\preto{\@verbatim}{%
  \setlength{\partopsep}{\topsep}%
  \setlength{\topsep}{-0.5ex plus 0.5ex minus 0ex}%
}

% Bigger bullet size for itemize.
\newcommand{\mybullet}{\LARGE\raise-0.3ex\hbox{\textbullet}}
\defbeamertemplate{itemize item}{mybullet}{\mybullet}
\setbeamertemplate{itemize item}[mybullet]

% "section page" template.
\defbeamertemplate{section page}{naive}[1][]{%
  \begingroup
  \centering
  \begin{beamercolorbox}[sep=12pt,center,#1]{section title}%
    \usebeamerfont{section title}\insertsection\par
  \end{beamercolorbox}%
  \endgroup
}
\setbeamertemplate{section page}[naive]

%}}}

\mode<all>
% latest-raw-url: https://raw.githubusercontent.com/tueda/beamertheme-naive/master/beamerthemenaive.sty