%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%          LADDER           %%
%%      Aurélien CADIOU      %%
%% contact@aureliencadiou.fr %%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%% Licence : MIT licence
%% Repository : https://github.com/AurelienC/tex-ladder

\NeedsTeXFormat{LaTeX2e}[1999/01/01]
\ProvidesPackage{ladder}[2017/05/17]


% Packages required
\RequirePackage{tikz}
\RequirePackage{ifthen}
\RequirePackage{calc}


\newcounter{nextY}%
\newcounter{nextYPar}%
\newcounter{nextX}%
\newcounter{currentY}%
\newcounter{currentX}%
\newcounter{tempCurrentY}%
\newcounter{startPar}%
\newcounter{stopPar}%
\newcounter{memCurrentX}%
\newcounter{memCurrentY}%


%%% NEW LINE %%%
\newcommand{\ladderLine}[0]{
	% Updating variables
	\setcounter{currentX}{0}
	\setcounter{nextX}{0}
	\setcounter{currentY}{\value{nextY}}
}


%%% TEXT %%%
\newcommand{\ladderText}[3][]{
	\draw[text centered](\value{currentX}+1,\value{currentY}+1) node {\textbf{#2}};
	\draw[text centered](\value{currentX}+1,\value{currentY}+0.5) node {\textit{#3}};
	\draw[text centered](\value{currentX}+1,\value{currentY}) node {\texttt{\LARGE{#1}}};
}


%%% NO CONTACT %%%
\newcommand{\ladderNO}[3][]{
	% Updating variables
	\setcounter{currentX}{\value{nextX}}
	\setcounter{tempCurrentY}{\value{currentY}-2}
	\ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
	\ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
	\addtocounter{nextX}{2}

	% Drawing
	\draw(\value{currentX}+0.75,\value{currentY}+0.25) -- (\value{currentX}+0.75,\value{currentY}-0.25); % First bar of NO contact
	\draw(\value{currentX}+1.25,\value{currentY}+0.25) -- (\value{currentX}+1.25,\value{currentY}-0.25); % Second bar of NO contact
	\draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.75,\value{currentY}); % Connection
	\draw(\value{currentX}+1.25,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
	\ladderText[#1]{#2}{#3}
}


%%% NC CONTACT %%%
\newcommand{\ladderNC}[3][]{
	% Updating variables
	\setcounter{currentX}{\value{nextX}}
	\setcounter{tempCurrentY}{\value{currentY}-2}
	\ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
	\ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
	\addtocounter{nextX}{2}

	% Drawing
	\draw(\value{currentX}+0.75,\value{currentY}+0.25) -- (\value{currentX}+0.75,\value{currentY}-0.25) -- (\value{currentX}+1.25,\value{currentY}+0.25) -- (\value{currentX}+1.25,\value{currentY}-0.25); % NC contact
	\draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.75,\value{currentY}); % Connection
	\draw(\value{currentX}+1.25,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
	\ladderText[#1]{#2}{#3}
}


%%% COILS %%%
\newcommand{\ladderC}[3][]{
	% Updating variables
	\setcounter{currentX}{\value{nextX}}
	\setcounter{tempCurrentY}{\value{currentY}-2}
	\ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
	\ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
	\addtocounter{nextX}{2}

	% Drawing
	\draw (\value{currentX}+1,\value{currentY}) circle (0.3);
	\draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.7,\value{currentY}); % Connection
	\draw(\value{currentX}+1.3,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
	\ladderText[#1]{#2}{#3}
}



%%% START OF PARALLEL SECTION %%%
\newcommand{\startParallel}[0]{
	\setcounter{startPar}{\value{nextX}} % Store the X of beginning
}



%%% DEBUT PARALLELE %%%
\newcommand{\setParallel}[0]{
  \setcounter{stopPar}{\value{nextX}}%
  \draw(\value{startPar},\value{currentY}) -- (\value{startPar},\value{nextYPar}); % Vertical bar
  \setcounter{memCurrentX}{\value{nextX}}%
  \setcounter{memCurrentY}{\value{currentY}}%
  \setcounter{nextX}{\value{startPar}}%
  \setcounter{currentY}{\value{nextYPar}}%
}


%%% END OF PARALLEL SECTION %%%
\newcommand{\unsetParallel}[0]{
  % Parallel section is more larger than "normal" section test
  \ifthenelse{\value{nextX}>\value{memCurrentX}}{}{\draw(\value{nextX},\value{currentY}) -- (\value{stopPar},\value{currentY}) -- (\value{stopPar},\value{memCurrentY});}
  \ifthenelse{\value{nextX}>\value{memCurrentX}}{\draw (\value{nextX},\value{currentY}) -- (\value{nextX},\value{memCurrentY}) -- (\value{memCurrentX},\value{memCurrentY});}{\setcounter{nextX}{\value{memCurrentX}}}
  \setcounter{currentY}{\value{memCurrentY}}
  \setcounter{nextYPar}{0}
}