% 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 } 
}

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

\ctikzset{annotation above/.code = { 
	a=#1, 
	\circuitikzbasekey/bipole/annotation/position=90 }
}

\ctikzset{a^/.style = { 
	a=#1,
	\circuitikzbasekey/bipole/annotation/position=90 } 
}

\ctikzset{annotation below/.code = { 
	a=#1,
	\circuitikzbasekey/bipole/annotation/position=-90 } 
}
\ctikzset{a_/.style = { 
	a=#1,
	\circuitikzbasekey/bipole/annotation/position=-90 } 
}



\def\pgf@circ@drawlabels#1{
		\pgfextra{
			\edef\pgf@temp{\ctikzvalof{label/align}}
			\def\pgf@circ@temp{straight}
		}
		\ifx\pgf@temp\pgf@circ@temp %straight
			\pgf@circ@drawreglabels{#1}
		\else
			\pgfextra{\def\pgf@circ@temp{rotate}}
			\ifx\pgf@temp\pgf@circ@temp %rotate
				\pgf@circ@drawrotlabels{#1}
			\else % smart
				\pgf@circ@drawsmartlabels{#1}
			\fi
		\fi
}


\def\pgf@circ@drawsmartlabels#1{
	\pgfextra{
		\pgfmathmod{\pgf@circ@direction}{90}
		\edef\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
	}
	\ifnum \pgfcircmathresult > 20	
		\ifnum \pgfcircmathresult < 70
			\pgf@circ@drawrotlabels{#1}
		\else
			\pgf@circ@drawreglabels{#1}
		\fi
	\else
		\pgf@circ@drawreglabels{#1}
	\fi
}


\def\pgf@circ@drawrotlabels#1{
	\pgfextra{
		\def\pgf@circ@temp{\ctikzvalof{bipole/#1/position}} 
		\edef\pgfcirclabrot{\pgf@circ@direction} % first or fourth quadrant
		\edef\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgf@circ@direction\pgf@nil}
		\ifnum \pgfcircmathresult > 90 \ifnum \pgfcircmathresult < 270 % second or third quadrant
			\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
	
		\pgfmathadd{\pgf@circ@direction}{90}
		\edef\pgf@circ@labpos{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		}
		\ifnum \ctikzvalof{mirror value} = -1
			(\ctikzvalof{bipole/name}.south)++(\pgf@circ@labpos:1.5ex) coordinate (labelcoor)
		\else
			(\ctikzvalof{bipole/name}.north)++(\pgf@circ@labpos:1.5ex) coordinate (labelcoor)
		\fi
		(labelcoor) node [rotate=\pgfcirclabrot,anchor=mid] {\pgf@circ@finallabels{#1}} 
}

\def\pgf@circ@drawreglabels#1{
	\pgfextra{
		\pgfmathsubtract{\pgf@circ@direction}{90}
		\edef\pgf@circ@labanc{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		
		\edef\pgf@circ@temp{\ctikzvalof{bipole/#1/position}} 
		\ifnum \pgf@circ@temp < 0
			\pgfmathadd{\pgf@circ@labanc}{180}
			\edef\pgf@circ@labanc{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
		\ifpgf@circuit@bipole@inverted
				\pgfmathadd{\pgf@circ@temp}{180}
				\edef\pgf@circ@temp{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
		
		\ifnum \ctikzvalof{mirror value} = -1
				\pgfmathadd{\pgf@circ@temp}{180}
				\edef\pgf@circ@temp{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
		\fi
		\pgfmathadd{\pgf@circ@direction}{90}
		\edef\pgf@circ@labpos{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}		
	}

	\ifnum \pgf@circ@labanc = -90
		\ifnum \ctikzvalof{mirror value} = -1
			(\ctikzvalof{bipole/name}.south)++(\pgf@circ@labpos:1.5ex) coordinate (labelcoor)
		\else
			(\ctikzvalof{bipole/name}.north)++(\pgf@circ@labpos:1.5ex) coordinate (labelcoor)
		\fi
		(labelcoor) node [anchor=mid] {\pgf@circ@finallabels{#1}} 

	\else
		(\ctikzvalof{bipole/name}.\pgf@circ@temp) node [anchor=\pgf@circ@labanc]{\pgf@circ@finallabels{#1}}
 	 \fi
}

\def\pgf@circ@finallabels#1{%
	\edef\pgf@temp{}%
	\edef\pgf@circ@temp{\ctikzvalof{bipole/#1/unit}}%
	\ifx\pgf@temp\pgf@circ@temp%
	\ctikzvalof{bipole/#1/name}%
	\else%
	$\SI{\ctikzvalof{bipole/#1/name}}{\ctikzvalof{bipole/#1/unit}}$%
	\fi%
}

\ctikzset{text/.style = { t=#1 } }
\ctikzset{t/.code = { 
	\ctikzsetvalof{bipoles/twoport/text}{#1}
}}
\endinput