\NeedsTeXFormat{LaTeX2e}[1994/06/01]
\ProvidesPackage{DUStyle}[2018/02/25 DUStyle Package]

% The macro can be used to create your own style :
% the style will apply by declaring a custom class :

%\createIconifiedDUStyle{warning}{orange}{!}{large}
%\createIconifiedDUStyle{note}{blue}{}{large}

% .. admonition:: Title
%   :class: warning

% .. sidebar:: Title
%  :class: note

\RequirePackage{tikz}
\RequirePackage{mdframed}
\RequirePackage{xcolor}
\RequirePackage{ifthen}

% Background color for the frame.
\definecolor{DUStyle@lightGray}{RGB}{245, 245, 245}

% arg1 : The circle backround color
% arg2 : The dot content
% arg3 : The title environment
% arg4 : The title
\newcommand{\DUStyle@iconizedTitle}[4]{%
  \begin{#3}%
  \ifthenelse{\equal{#2}{}}
    {}
    {%
      \tikz[baseline]{%
        \node[circle,fill=#1,inner sep=3pt,anchor=base] at (0, 0)%
        {\color{DUStyle@lightGray}#2};
      }%
    }
  {#4}
  \end{#3}
}

\newcommand{\DUStyle@colorBox}[2]{%
  \begin{mdframed}[topline=false,
    bottomline=false,
    rightline=false,
    linecolor=#1,
    linewidth=3pt,
    skipabove=0.5cm,
    backgroundcolor=DUStyle@lightGray]%
    #2
  \end{mdframed}
}

% Create two commands with the same style :
% - for the admonition colored box
% - for the titles in styles (sidebar, admonitions...)
\newcommand\createIconifiedDUStyle[4]{%
  \expandafter\newcommand\csname DUadmonition#1\endcsname[1]{\DUStyle@colorBox{#2}{##1}}
  \expandafter\newcommand\csname DUtitle#1\endcsname[1]{\DUStyle@iconizedTitle{#2}{#3}{#4}{##1}}
}