% Copyright 2007-2009 by Massimo Redaelli
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/LICENSE for more details.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Bipole label positioning

%% Options
\ctikzset{label/.style = { l=#1 } }
\ctikzset{l/.code = { 
	\pgfkeys{/tikz/circuitikz/bipole/label/name=#1}
	\ctikzsetvalof{bipole/label/unit}{}
	\ifpgf@circ@siunitx 
		\pgf@circ@handleSI{#1}
		\ifpgf@circ@siunitx@res 
			\edef\pgf@temp{\pgf@circ@handleSI@val}
			\pgfkeyslet{/tikz/circuitikz/bipole/label/name}{\pgf@temp}
			\edef\pgf@temp{\pgf@circ@handleSI@unit}
			\pgfkeyslet{/tikz/circuitikz/bipole/label/unit}{\pgf@temp}
		\else
		\fi
	\else
	\fi
}}

\ctikzset{label above/.code = { 
	l=#1, 
	\circuitikzbasekey/bipole/label/position=90 }
}
\ctikzset{l^/.style = { 
	l=#1,
	\circuitikzbasekey/bipole/label/position=90 } 
}

\ctikzset{label below/.code = { 
	l=#1,
	\circuitikzbasekey/bipole/label/position=-90 } 
}
\ctikzset{l_/.style = { 
	l=#1,
	\circuitikzbasekey/bipole/label/position=-90 } 
}



\def\pgf@circ@drawlabel{
		\pgfextra{
			\edef\pgf@temp{\ctikzvalof{label/align}}
			\def\pgf@circ@temp{straight}
		}
		\ifx\pgf@temp\pgf@circ@temp %straight
			\pgf@circ@drawreglabel
		\else
			\pgfextra{\def\pgf@circ@temp{rotate}}
			\ifx\pgf@temp\pgf@circ@temp %rotate
				\pgf@circ@drawrotlabel
			\else % smart
				\pgf@circ@drawsmartlabel				
			\fi
		\fi
}

\def\pgf@circ@drawsmartlabel{
	\pgfextra{
		%\pgfmathadd{\pgf@circ@direction}{360}
		\pgfmathmod{\pgf@circ@direction}{90}
		\edef\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
	}
	\ifnum \pgfcircmathresult > 20 
		\ifnum \pgfcircmathresult < 70 % NON quasi retto
			\pgf@circ@drawrotlabel
		\else
			\pgf@circ@drawreglabel
		\fi
	\else 
		\pgf@circ@drawreglabel
	\fi
}

%% Output routing
%% #1 - node name

\def\pgf@circ@drawrotlabel{
	\pgfextra{
		% calcolo rotazione label
		\def\pgf@circ@temp{\ctikzvalof{bipole/label/position}} %%% àncora label
		\edef\pgfcirclabrot{\pgf@circ@direction} % primo e quarto quadrante
		\edef\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgf@circ@direction\pgf@nil}
		\ifnum \pgfcircmathresult > 90 \ifnum \pgfcircmathresult < 270 % terzo e secondo
			\pgfmathsubtract{\pgf@circ@direction}{180}
			\edef\pgfcirclabrot{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
			\pgfmathadd{\pgf@circ@temp}{180} %%%
			\edef\pgf@circ@temp{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil} %%%
		\fi\fi
		
		\ifnum \ctikzvalof{mirror value} = -1
			\pgfmathadd{\pgf@circ@temp}{180}
			\edef\pgf@circ@temp{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
	}
	coordinate (labelcoor) at ($(\ctikzvalof{bipole/name})!2!(\ctikzvalof{bipole/name}.north)$)
	(labelcoor) node [transform shape, rotate=\pgfcirclabrot] {\pgf@circ@finallabel{}}
}

\def\pgf@circ@drawreglabel{
	\pgfextra{
		\pgfmathsubtract{\pgf@circ@direction}{90}
		\edef\pgf@circ@labanc{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		
		\edef\pgf@circ@temp{\ctikzvalof{bipole/label/position}} %%% àncora label
		\ifnum \pgf@circ@temp < 0
			\pgfmathadd{\pgf@circ@labanc}{180}
			\edef\pgf@circ@labanc{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
		
		\ifnum \ctikzvalof{mirror value} = -1
			\pgfmathadd{\pgf@circ@labanc}{180}
			\edef\pgf@circ@labanc{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
	}
	node [ anchor = \pgf@circ@labanc] 
	  at (\ctikzvalof{bipole/name}.\pgf@circ@temp) {\pgf@circ@finallabel{}}
}


\endinput