beamerinnerthemetcolorbox.sty

% !TeX root = ./testing/test.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% The tcolorbox inner theme
% A beamer inner theme which reproduces standard beamer blocks using tcolorboxes
% Maintained by samcarter
%
% Project repository and bug tracker:
% https://github.com/samcarter/beamertheme-tcolorbox
%
% Released under the LaTeX Project Public License v1.3c or later
% See https://www.latex-project.org/lppl.txt
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ProvidesPackage{beamerinnerthemetcolorbox}[2025/02/01 version v0.9 Beamer blocks with tcolorboxes]

\RequirePackage{tcolorbox}
\tcbuselibrary{skins,hooks}

\providecommand\@secondofthree[3]{#2}

\tcbset{
  beamer@tcb@if/.code n args = {3}{%  
    \csname #1\endcsname\expandafter\@secondofthree\fi  
    \@secondoftwo{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}%
  }
}
\newif\ifbeamer@tcb@rounded
\newif\ifbeamer@tcb@shadow
\newif\ifbeamer@tcb@shaded
\newif\ifbeamer@tcb@showtitle
\newif\ifbeamer@tcb@inmargin
\newif\ifbeamer@tcb@color
\newif\ifbeamer@tcb@left
\newif\ifbeamer@tcb@right
\newif\ifbeamer@tcb@center
\newif\ifbeamer@tcb@titlepage
\newif\ifbeamer@tcb@blocks
\beamer@tcb@colortrue
\def\beamer@tcb@true{true}

\tikzset{
  /beamer@tcb/.cd,
  wd/.store in = \beamer@tcb@wd,
  wd = \textwidth,
  dp/.code = \relax,
  ht/.code = \relax,
  left/.code = \beamer@tcb@lefttrue,
  right/.code = \beamet@tcb@righttrue,
  center/.code = \beamer@tcb@centertrue,
  leftskip/.store in = \beamer@tcb@leftskip,
  leftskip = 0.05cm,
  rightskip/.store in = \beamer@tcb@rightskip,
  rightskip = 0.05cm,
  sep/.store in = \beamer@tcb@sep,
  sep = 1mm,
  colsep/.code = \relax,
  colsep*/.code = \relax,
  shadow/.code = \relax,
  rounded/.code = \relax,
  ignorebg/.code = \relax,
  vmode/.code = \relax,
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Theme Options
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\DeclareOptionBeamer{shadow}[true]{\csname beamer@tcb@shadow#1\endcsname}
\DeclareOptionBeamer{rounded}[true]{\csname beamer@tcb@rounded#1\endcsname\csname beamer@tcb@shaded#1\endcsname\csname beamer@tcb@showtitlefalse\endcsname}
\DeclareOptionBeamer{shaded}[true]{\csname beamer@tcb@shaded#1\endcsname}
\DeclareOptionBeamer{inmargin}[true]{\csname beamer@tcb@inmargin#1\endcsname}
\DeclareOptionBeamer{showtitle}[true]{\csname beamer@tcb@showtitle#1\endcsname}
\DeclareOptionBeamer{titlepage}[true]{\csname beamer@tcb@titlepage#1\endcsname}
\DeclareOptionBeamer{blocks}[true]{\csname beamer@tcb@blocks#1\endcsname}

\ExecuteOptionsBeamer{shadow=false}
\ExecuteOptionsBeamer{rounded=false}
\ExecuteOptionsBeamer{shaded=false}
\ExecuteOptionsBeamer{inmargin=false}
\ExecuteOptionsBeamer{showtitle=true}
\ExecuteOptionsBeamer{titlepage=true}
\ExecuteOptionsBeamer{blocks=true}

% check options from other themes
\ifdefined\beamer@themerounded@shadow
  \beamer@tcb@roundedtrue
  \beamer@tcb@shadedtrue
  \ifx\beamer@themerounded@shadow\beamer@tcb@true
    \beamer@tcb@shadowtrue
  \fi
  \beamer@tcb@showtitlefalse
\fi

\ifdefined\beamer@putleft
  \beamer@tcb@inmargintrue
\fi

\ProcessOptionsBeamer

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Colours
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newcommand{\beamer@tcb@colini}[1][]{
  \usebeamercolor{block body#1} 
  \colorlet{beamer@tcb@bodybg}{block body#1.bg}
  \colorlet{beamer@tcb@bodyfg}{block body#1.fg}
  \usebeamercolor{block title#1} 
  \colorlet{beamer@tcb@titlebg}{block title#1.bg}
  \colorlet{beamer@tcb@titlefg}{block title#1.fg}  
  \usebeamercolor{normal text}
}
\beamer@tcb@colini

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% General Settings
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\tcbset{
  oversize=0mm
}

\tcbsetforeverylayer{
  left=0.05cm,
  right=0.05cm,
  enhanced,
  boxrule=0cm,
  frame hidden,
  top=1.5mm,
  bottom=0.5mm,
  colback=beamer@tcb@bodybg,
  colbacktitle=beamer@tcb@titlebg,
  coltext=beamer@tcb@bodyfg,
  coltitle=beamer@tcb@titlefg,
}

% optional settings
\ifbeamer@tcb@rounded
  \tcbsetforeverylayer{
    arc=1.3mm,
    top=0.8mm,
    toptitle=0.2mm,
    bottom=0mm,
  }
\else
  \tcbsetforeverylayer{sharpish corners}
\fi

\ifbeamer@tcb@shaded
  \tcbsetforeverylayer{
    title code app={
      \shade[top color=beamer@tcb@titlebg,bottom color=beamer@tcb@bodybg] (title.south west) rectangle ([yshift=-0.5mm]title.south east); 
    }    
  }
\fi

\ifbeamer@tcb@shadow
  \tcbsetforeverylayer{drop fuzzy shadow=black!90}
\fi

\ifbeamer@tcb@inmargin
  \tcbsetforeverylayer{
    detach title, 
    overlay={
      \node[anchor=north east,align=right,text width=\dimexpr\beamer@leftsidebar-\beamer@leftmargin-\beamer@rightmargin\relax] at ([xshift=-\beamer@leftmargin]frame.north west) {\tcbtitle};
    }
  }
\fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Defining blocks
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\mode<presentation>

\newtcolorbox{beamer@tcb@block}[1][]{
  code={
    \beamer@tcb@colini[#1]
    \ifx\insertblocktitle\@empty\else
      \beamer@tcb@showtitletrue
    \fi
  },
  colback=beamer@tcb@bodybg,
  colbacktitle=beamer@tcb@titlebg,
  coltext=beamer@tcb@bodyfg,
  coltitle=beamer@tcb@titlefg,
  before title={\usebeamerfont{block title}},
  before upper={\usebeamercolor{block body}\usebeamerfont{block body}},
  beamer@tcb@if={ifbeamer@tcb@showtitle}{title={\insertblocktitle}}{},
}

\ifbeamer@tcb@blocks
  \setbeamertemplate{block begin}{\begin{beamer@tcb@block}} 
  \setbeamertemplate{block end}{\end{beamer@tcb@block}}
  \setbeamertemplate{block alerted begin}{\begin{beamer@tcb@block}[ alerted]} 
  \setbeamertemplate{block alerted end}{\end{beamer@tcb@block}}
  \setbeamertemplate{block example begin}{\begin{beamer@tcb@block}[ example]} 
  \setbeamertemplate{block example end}{\end{beamer@tcb@block}}
\fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% patch title page etc.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newcommand{\beamer@tcb@patchcolorbox}{%
  \renewtcolorbox{beamercolorbox}[2][]{%
    code={%
      \usebeamercolor{##2}% 
      \colorlet{beamer@tcb@bodybg}{##2.bg}%
      \colorlet{beamer@tcb@bodyfg}{##2.fg}%
      \ifbeamercolorempty[bg]{##2}{}{\beamer@tcb@colorfalse}%
      \tikzset{/beamer@tcb/.cd,##1}%      
    },
    colback=beamer@tcb@bodybg,
    coltext=beamer@tcb@bodyfg,
    beamer@tcb@if={ifbeamer@tcb@color}{no shadow}{boxsep=\beamer@tcb@sep},
    width=\beamer@tcb@wd,
    beamer@tcb@if={ifbeamer@tcb@center}{halign=center}{},
    beamer@tcb@if={ifbeamer@tcb@left}{halign=left}{},   
    beamer@tcb@if={ifbeamer@tcb@right}{halign=right}{},    
    left=\beamer@tcb@leftskip,
    right=\beamer@tcb@rightskip,  
    before upper={\strut},
  }%
}

\ifbeamer@tcb@titlepage
  \addtobeamertemplate{title page}{\begingroup\ifx\insertsubtitle\@empty\else\apptocmd{\insertsubtitle}{\strut}{}{}\fi\beamer@tcb@patchcolorbox}{\endgroup}
  \addtobeamertemplate{part page}{\begingroup\beamer@tcb@patchcolorbox}{\endgroup}
  \addtobeamertemplate{section page}{\begingroup\beamer@tcb@patchcolorbox}{\endgroup}
  \addtobeamertemplate{subsection page}{\begingroup\beamer@tcb@patchcolorbox}{\endgroup}
\fi

\mode<all>