\usepackage{listings}
\usepackage[usenames,dvipsnames]{xcolor}

\colorlet{blockKeywordColor}{blue}
\colorlet{blockBaseFunctionsColor}{black}
\colorlet{blockStringColor}{Maroon!100!black!50!}
\colorlet{blockCommentColor}{ForestGreen}
\colorlet{nbKeywordColor}{blue}
\colorlet{nbBaseFunctionsColor}{black}
\colorlet{nbStringColor}{Maroon!50!black!50!}
\colorlet{nbCommentColor}{gray} % Changed from ForestGreen

%% DEFINE LANGUAGE %%
% Adapted from jub0bs in StackOverflow, see
% https://tex.stackexchange.com/questions/212793/how-can-i-typeset-julia-code-with-the-listings-package
\lstdefinelanguage{Julia}%
  {morekeywords=[1]{abstract,break,case,catch,const,continue,do,else,elseif,%
      end,export,false,for,function,immutable,import,importall,if,in,%
      macro,module,otherwise,quote,return,switch,true,try,type,typealias,%
      using,while},%
   sensitive=true,%
   alsoother={\$},%
   morekeywords=[2]{exp,sum,plot,optimize,minimizer},
   morecomment=[l]\#,%
   morecomment=[n]{\#=}{=\#},%
   morestring=[s]{"}{"},%
   morestring=[m]{'}{'},%
}[keywords,comments,strings]%

%% STYLES
% Adapted from Marco Daniel in StackOverflow, see
% https://tex.stackexchange.com/questions/34688/lstlisting-how-to-set-code-color-and-frame-color
\lstdefinestyle{blockJuliaStyle}{
    language        = Julia,
    %columns=flexible,
    %keepspaces      =true,
    columns         = fullflexible,
    basicstyle      = \fontfamily{pcr}\selectfont\footnotesize, %need pcr (Courier) to bold letters
    keywordstyle    = {[1]\bfseries\color{blockKeywordColor}},
    keywordstyle    = {[2]\bfseries\color{blockBaseFunctionsColor}},
    stringstyle     = \bfseries\color{blockStringColor},
    commentstyle    = \slshape\color{blockCommentColor},
    showstringspaces = false,
    numbers=none, % where to put the line-numbers
    numberstyle=\tiny, % the size of the fonts that are used for the line-numbers     
    showspaces=false, % show spaces adding particular underscores
    showstringspaces=false, % underline spaces within strings
    showtabs=false, % show tabs within strings adding particular underscores
    frame=tb, % rule at top and bottom of code listing
    captionpos=b, % sets the caption-position to bottom
    breaklines=true, % sets automatic line breaking
    tabsize=2, % sets default tabsize to 2 spaces
    rulesepcolor=\color{gray},
    rulecolor=\color{black},
    breakatwhitespace=false, 
}

% See how to define style in tcblisting
% https://tex.stackexchange.com/questions/247608/problem-with-gobble-listing-option-inside-a-tcblisting
\lstdefinestyle{nbJuliaStyle}{
    language        = Julia,
    basicstyle      =  \fontfamily{pcr}\selectfont\scriptsize, % Changed from \footnotesize
    %\fontfamily{pcr}\selectfont\footnotesize, 
    keywordstyle    = {[1]\bfseries\color{nbKeywordColor}},
    keywordstyle    = {[2]\bfseries\color{nbBaseFunctionsColor}},
    stringstyle     = \bfseries\color{nbStringColor},
    commentstyle   = \slshape\color{nbCommentColor},
    showstringspaces = false,
    keywordstyle    = {[3]\itshape\color{RedOrange}},
    breaklines=true, % sets automatic line breaking
}

 \lstset{literate=
    {*}{{\char42}}1
    {-}{{\char45}}1
    {\ }{{\copyablespace}}1
}

%% COPY AND PASTABLE CODE from PDF %%
% Make code so it is copy and pastable from PDF, see
% https://www.monperrus.net/martin/copy-pastable-listings-in-pdf-from-latex
% Also
% https://tex.stackexchange.com/questions/142617/copy-pasting-leading-whitespace-and-blank-lines-in-listings-package-pdf/142765#142765
% https://tex.stackexchange.com/questions/563803/how-make-a-latex-document-that-generates-a-pdf-from-which-copy-paste-works-corre
%%%%

\usepackage[space=true]{accsupp}
% Copy spacing at beginning and end
\newcommand{\copyablespace}{\BeginAccSupp{method=hex,unicode,ActualText=00A0}\ \EndAccSupp{}}


%% NOTEBOOK CELL STYLING %%
% See below for tcolorbox examples
% https://tex.stackexchange.com/questions/223465/ipython-notebook-cells-with-listings
% https://tex.stackexchange.com/questions/340700/ipython-notebook-input-and-output-cells-with-listings
%%%%%
% See for styling tcblistings
% https://tex.stackexchange.com/questions/247608/problem-with-gobble-listing-option-inside-a-tcblisting
%%%%%
\usepackage[many]{tcolorbox}
\tcbuselibrary{listings}

\newlength\inwd
\setlength\inwd{1.3cm}
\definecolor{cell-background-light-gray}{RGB}{251, 251, 251}
\colorlet{nbInColor}{blue!50!black}

\newtcblisting[auto counter]{nbCell}{
  sharp corners,
  enlarge left by=\inwd,
  width=\linewidth-\inwd,
  %width=\linewidth,
  enhanced,
  boxrule=0.4pt,
  colback=cell-background-light-gray,
  listing only,
  top=0pt,
  bottom=0pt,
  overlay={
    \node[
      anchor=north east,
      text width=\inwd,
      font=\footnotesize\ttfamily\color{nbInColor},
      inner ysep=2mm,
      inner xsep=0pt,
      outer sep=0pt
      ] 
      at (frame.north west)
    %   {\stepcounter{ipythcntr}In [#1]:};
      {In [\thetcbcounter]:};
  },
  listing options={
    style   = nbJuliaStyle,
  },
}