% Copyright 2018-2020 by Romano Giannetti
% Copyright 2015-2020 by Stefan Lindner
% Copyright 2013-2020 by Stefan Erhardt
% Copyright 2007-2020 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 files gpl-3.0_license.txt and lppl-1-3c_license.txt for more details.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Quadripoles

\long\def\pgfcircdeclarequadpole#1#2#3{
    \pgfdeclareshape{#1}
    {
        \savedmacro{\ctikzclass}{\edef\ctikzclass{inductors}}
        \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
        % shapename
        \savedmacro{\thisshape}{\def\thisshape{\tikz@fig@name}}
        \anchor{center}{
            \northwest
            \pgf@x=0pt
            \pgf@y=0pt
        }
        \savedmacro{\stretto}{\def\stretto{\ctikzvalof{quadpoles/#1/inner}}}
        \savedanchor\northwest{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/#1/height}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=.5\pgf@circ@scaled@Rlen
            \pgf@x=-\ctikzvalof{quadpoles/#1/width}\pgf@x
        }
        %% we define the upper right (positive coord) dot (which is B1)
        \savedanchor{\innerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            % by default use the cute inductor size
            \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/cuteinductor/height}*\pgf@circ@scaled@Rlen/2}
            % check if it's american
            \edef\pgf@circ@temp{\ctikzvalof{inductor}}
            \edef\pgf@temp{american}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/americaninductor/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            % check if it's european
            \edef\pgf@temp{european}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/fullgeneric/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        \savedanchor{\outerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            % by default use the cute inductor size
            \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/cuteinductor/height}*\pgf@circ@scaled@Rlen/2}
            % check if it's american
            \edef\pgf@circ@temp{\ctikzvalof{inductor}}
            \edef\pgf@temp{american}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/americaninductor/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            % check if it's european
            \edef\pgf@temp{european}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/fullgeneric/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        \anchor{A2}{
            \northwest
            \pgf@y=-\pgf@y
        }
        \anchor{B1}{
            \northwest
            \pgf@x=-\pgf@x
        }
        \anchor{A1}{
            \northwest
        }
        \anchor{B2}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=-\pgf@y
        }
        %% dot's anchors
        \anchor{inner dot A1}{\innerdot\pgf@x=-\pgf@x}
        \anchor{outer dot A1}{\outerdot\pgf@x=-\pgf@x}
        \anchor{inner dot A2}{\innerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{outer dot A2}{\outerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{inner dot B1}{\innerdot}
        \anchor{outer dot B1}{\outerdot}
        \anchor{inner dot B2}{\innerdot\pgf@y=-\pgf@y}
        \anchor{outer dot B2}{\outerdot\pgf@y=-\pgf@y}
        % geographical
        \anchor{north}{
            \northwest
            \pgf@x=0pt
        }
        \anchor{south}{
            \northwest
            \pgf@x=0pt
            \pgf@y=-\pgf@y
        }
        \anchor{west}{
            \northwest
            \pgf@y=0pt
        }
        \anchor{east}{
            \northwest
            \pgf@y=0pt
            \pgf@x=-\pgf@x
        }
        \anchor{south west}{
            \northwest
            \pgf@y=-\pgf@y
        }
        \anchor{north east}{
            \northwest
            \pgf@x=-\pgf@x
        }
        \anchor{north west}{
            \northwest
        }
        \anchor{south east}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=-\pgf@y
        }
        \anchor{base}{
            \northwest
            \pgf@x=0pt
        }
        #3
        \backgroundpath{
            \pgfsetcolor{\ctikzvalof{color}}

            \northwest
            \pgf@circ@res@up = \pgf@y
            \pgf@circ@res@down = -\pgf@y
            \pgf@circ@res@right = -\pgf@x
            \pgf@circ@res@left = \pgf@x
            #2
        }
    }
}


\def\pgf@circ@drawtransformerbasicanchor{
    \ctikzvalof{quadpoles/trans/height}
    \anchor{AA2}{
        \northwest
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=-\pgf@y
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{BB1}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{AA1}{
        \northwest
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{BB2}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=-\pgf@y
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
}

%% Null styles that can be used to change individually the L1 and L2
%% inductors of the transformer.

\ctikzset{transformer L1/.style={}}
\ctikzset{transformer L2/.style={}}

\def\pgf@circ@drawtransformerbasicbody{
    \pgfscope
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@up}%
            }{%
            \pgfpoint
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@down}%
        }

        \pgfkeys{\circuitikzbasekey/.cd, transformer L1}
        \edef\pgf@circ@temp{\ctikzvalof{inductor}}%
        \def\pgf@temp{european}%
        \ifx\pgf@temp\pgf@circ@temp%
            \pgfnode{fullgenericshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
        \else%
            \def\pgf@temp{cute}
            \ifx\pgf@temp\pgf@circ@temp%
                \pgfnode{cuteinductorshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
            \else%
                \pgfnode{americaninductorshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
            \fi%
        \fi%


    \endpgfscope
    \pgfscope
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@down}%
            }{%
            \pgfpoint
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@up}%
        }

        \pgfkeys{\circuitikzbasekey/.cd, transformer L2}
        \edef\pgf@circ@temp{\ctikzvalof{inductor}}%
        \def\pgf@temp{european}%
        \ifx\pgf@temp\pgf@circ@temp%
            \pgfnode{fullgenericshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
        \else%
            \def\pgf@temp{cute}
            \ifx\pgf@temp\pgf@circ@temp%
                \pgfnode{cuteinductorshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
            \else%
                \pgfnode{americaninductorshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
            \fi%
        \fi%

    \endpgfscope

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-L1}{b}}

    \pgfpathmoveto{\pgfpointanchor{\thisshape-L1}{a}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-L2}{a}}

    \pgfpathmoveto{\pgfpointanchor{\thisshape-L2}{b}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}

    \pgfusepath{draw}

}


\pgfcircdeclarequadpole{transformer}{
    \pgf@circ@drawtransformerbasicbody
}{\pgf@circ@drawtransformerbasicanchor}

\pgfcircdeclarequadpole{transformer core}{

    \pgf@circ@drawtransformerbasicbody

    % use the chocke line thickness
    \pgfsetlinewidth{\ctikzvalof{bipoles/cutechoke/cthick}\pgflinewidth}

    % Find the distance from center for the lines representing the core
    % the 2.5 is for backward compatibility --- the distance was calculated as a fraction
    % of the whole component, now as a fraction of the distance between coils, to be
    % compatible with the quadpoles "inner" style.
    \pgfmathsetlength{\pgf@circ@res@other}{2.5*\stretto*\ctikzvalof{quadpoles/transformer core/core width}*\pgf@circ@res@right}

    \pgfmoveto{\pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
    }
    \pgflineto{
        \pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
    }

    %% this should be just -\pgf@circ@res@other, but in case someone define an asymmetric trafo someday...
    \pgfmathsetlength{\pgf@circ@res@other}{2.5*\stretto*\ctikzvalof{quadpoles/transformer core/core width}*\pgf@circ@res@left}
    \pgfmoveto{\pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
    }
    \pgflineto{
        \pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
    }

    \pgf@circ@setlinewidth{bipoles}{\pgflinewidth}
    \pgfusepath{draw}
}{\pgf@circ@drawtransformerbasicanchor}


\pgfcircdeclarequadpole{gyrator}{

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}

    \pgfusepath{draw}

    \pgf@circ@setlinewidth{quadpoles}{\pgflinewidth}
    \pgfmathsetlength{\pgf@circ@res@other}{min(.7*\stretto*\pgf@circ@res@up, .8*\pgf@circ@res@right)} % radius
    \pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@left}{-\pgf@circ@res@other}}
    \pgfpatharc{-90}{90}{\pgf@circ@res@other}
    \pgfpathclose
    \pgf@circ@draworfill

    \pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@other}}
    \pgfpatharc{90}{270}{\pgf@circ@res@other}
    \pgfpathclose
    \pgf@circ@draworfill
}{}

%%%%%%%%%%%%%%%%%%%%
%% Block elements
%%%%%%%%%%%%%%%%%%%%

\pgfdeclareshape{mixer}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \ifpgf@circuit@boxed
            \pgf@y=\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \else
            \pgf@y=\ctikzvalof{tripoles/mixer/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{tripoles/mixer/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \fi
    }
    \anchor{center}{
        \pgfpointorigin
    }
    \anchor{left}{%
        \northwest
        \pgf@y=0pt
    }
    \anchor{1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{3}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{4}{
        \northwest
        \pgf@y=\pgf@y
        \pgf@x=0pt
    }
    \anchor{in 1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in 2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{in2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{out}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{center}{
        \pgf@y=0pt
        \pgf@x=0pt
    }
    \anchor{east}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{west}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{south}{
        \northwest
        \pgf@x=0pt
        \pgf@y=-\pgf@y
    }
    \anchor{north}{
        \northwest
        \pgf@x=0pt
    }
    \anchor{south west}{
        \northwest
        \pgf@y=-\pgf@y
    }
    \anchor{north east}{
        \northwest
        \pgf@x=-\pgf@x
    }
    \anchor{north west}{
        \northwest
    }
    \anchor{south east}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=-\pgf@y
    }
    \backgroundpath{
        \pgfsetcolor{\ctikzvalof{color}}
        \pgf@circ@scaled@Rlen=\scaledRlen

        \pgf@circ@res@step=\ctikzvalof{tripoles/mixer/width}\pgf@circ@scaled@Rlen

        \pgfscope
            \pgfstartlinewidth=\pgflinewidth

            % draw outer box
            \ifpgf@circuit@boxed
                \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
            \fi

            % draw outer circle
            \ifpgf@circuit@boxed
                \pgf@circ@res@step=.7\pgf@circ@res@step
                \pgfsetdash{}{0pt}	% draw solid circle if boxed
            \else
                \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \fi
            \pgfpathcircle{\pgfpoint{0}{0}} {0.5\pgf@circ@res@step}
            \pgf@circ@draworfill

            % draw inner stuff
            \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{135}{0.5\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{-45}{0.5\pgf@circ@res@step}}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{45}{0.5\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{-135}{0.5\pgf@circ@res@step}}
            \pgfusepath{draw}

        \endpgfscope
    }
}

\pgfdeclareshape{adder}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \ifpgf@circuit@boxed
            \pgf@y=\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \else
            \pgf@y=\ctikzvalof{tripoles/adder/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{tripoles/adder/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \fi
    }
    \anchor{center}{
        \pgfpointorigin
    }
    \anchor{left}{%
        \northwest
        \pgf@y=0pt
    }
    \anchor{1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{3}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{4}{
        \northwest
        \pgf@y=\pgf@y
        \pgf@x=0pt
    }
    \anchor{in 1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{in 2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{in2}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{out}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{center}{
        \pgf@y=0pt
        \pgf@x=0pt
    }
    \anchor{east}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{west}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{south}{
        \northwest
        \pgf@x=0pt
        \pgf@y=-\pgf@y
    }
    \anchor{north}{
        \northwest
        \pgf@x=0pt
    }
    \anchor{south west}{
        \northwest
        \pgf@y=-\pgf@y
    }
    \anchor{north east}{
        \northwest
        \pgf@x=-\pgf@x
    }
    \anchor{north west}{
        \northwest
    }
    \anchor{south east}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=-\pgf@y
    }
    \backgroundpath{
        \pgfsetcolor{\ctikzvalof{color}}
        \pgf@circ@scaled@Rlen=\scaledRlen

        \pgf@circ@res@step=\ctikzvalof{tripoles/adder/width}\pgf@circ@scaled@Rlen

        \pgfscope
            \pgfstartlinewidth=\pgflinewidth

            % draw outer box
            \ifpgf@circuit@boxed
                \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
            \fi

            % draw outer circle
            \ifpgf@circuit@boxed
                \pgf@circ@res@step=.7\pgf@circ@res@step{}
                \pgfsetdash{}{0pt}	% draw solid circle if boxed
            \else
                \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \fi
            \pgfpathcircle{\pgfpoint{0}{0}} {0.5\pgf@circ@res@step}
            \pgf@circ@draworfill

            % draw inner stuff
            \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
            \pgfsetlinewidth{\pgfstartlinewidth}

            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{0}{0.3\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{180}{0.3\pgf@circ@res@step}}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{90}{0.3\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{270}{0.3\pgf@circ@res@step}}
            \pgf@circ@setlinewidth{tripoles}{\pgflinewidth}
            \pgfusepath{draw}

        \endpgfscope
    }
}

\pgfdeclareshape{oscillator}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \ifpgf@circuit@boxed
            \pgf@y=\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
        \else
            \pgf@y=\ctikzvalof{tripoles/oscillator/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{tripoles/oscillator/width}\pgf@circ@scaled@Rlen
        \fi
    }
    \anchor{center}{
        \pgfpointorigin
    }
    \anchor{north}{
        \northwest
        \pgf@x=.5\pgf@x
    }
    \anchor{south}{
        \northwest
        \pgf@x=.5\pgf@x
        \pgf@y=-\pgf@y
    }
    \anchor{east}{
        \northwest
        \pgf@y=0pt
        \pgf@x=0pt
    }
    \anchor{west}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{south west}{ \northwest \pgf@y=-\pgf@y}
    \anchor{north east}{ \northwest \pgf@x=0pt\relax}
    \anchor{north west}{ \northwest }
    \anchor{south east}{ \northwest \pgf@x=0pt \pgf@y=-\pgf@y }
    \anchor{text}{
        \pgf@x=-2\pgf@x
        \advance \pgf@x by -.5\wd\pgfnodeparttextbox
        \advance \pgf@y by -1.5\ht\pgfnodeparttextbox
    }
    \backgroundpath{
        \pgfsetcolor{\ctikzvalof{color}}
        \pgf@circ@scaled@Rlen=\scaledRlen

        \pgf@circ@res@step=\ctikzvalof{tripoles/oscillator/width}\pgf@circ@scaled@Rlen{}

        \pgfscope
            \pgfstartlinewidth=\pgflinewidth

            \pgftransformxshift{-0.5\pgf@circ@res@step} % The oscillator is shifted to the left, so a connection comes out of the anchor "east"

            % draw outer box
            \ifpgf@circuit@boxed{}
                \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
            \fi

            % draw outer circle
            \ifpgf@circuit@boxed
                \pgf@circ@res@step=.7\pgf@circ@res@step{}
                \pgfsetdash{}{0pt}	% draw solid circle if boxed
            \else
                \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \fi
            \pgfpathcircle{\pgfpoint{0}{0}} {0.5\pgf@circ@res@step}
            \pgf@circ@draworfill

            % draw inner sine waves
            \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfsetcornersarced{\pgfpointorigin}% do not use rounded corners!
            \pgfpathmoveto{\pgfpoint{-0.3\pgf@circ@res@step}{0\pgf@circ@res@step}}
            \pgfpathsine{\pgfpoint{.15\pgf@circ@res@step}{.15\pgf@circ@res@step}}
            \pgfpathcosine{\pgfpoint{.15\pgf@circ@res@step}{-.15\pgf@circ@res@step}}
            \pgfpathsine{\pgfpoint{.15\pgf@circ@res@step}{-.15\pgf@circ@res@step}}
            \pgfpathcosine{\pgfpoint{.15\pgf@circ@res@step}{.15\pgf@circ@res@step}}

            \pgfusepath{draw}

        \endpgfscope
    }
}

\pgfdeclareshape{circulator}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \ifpgf@circuit@boxed
            \pgf@y=\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \else
            \pgf@y=\ctikzvalof{tripoles/circulator/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{tripoles/circulator/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \fi
    }
    \anchor{center}{
        \pgfpointorigin
    }
    \anchor{left}{%
        \northwest
        \pgf@y=0pt
    }
    \anchor{1}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{2}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{3}{
        \northwest
        \pgf@y=-\pgf@y
        \pgf@x=0pt
    }
    \anchor{east}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{west}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{south}{
        \northwest
        \pgf@x=0pt
        \pgf@y=-\pgf@y
    }
    \anchor{north}{
        \northwest
        \pgf@x=0pt
    }
    \anchor{south west}{
        \northwest
        \pgf@y=-\pgf@y
    }
    \anchor{north east}{
        \northwest
        \pgf@x=-\pgf@x
    }
    \anchor{north west}{
        \northwest
    }
    \anchor{south east}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=-\pgf@y
    }
    \backgroundpath{
        \pgfsetcolor{\ctikzvalof{color}}
        \pgf@circ@scaled@Rlen=\scaledRlen

        \pgf@circ@res@step=\ctikzvalof{tripoles/circulator/width}\pgf@circ@scaled@Rlen

        \pgfscope
            \pgfstartlinewidth=\pgflinewidth

            % draw outer box
            \ifpgf@circuit@boxed
                \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
            \fi

            % draw outer circle
            \ifpgf@circuit@boxed{}
                \pgf@circ@res@step=.7\pgf@circ@res@step{}
                \pgfsetdash{}{0pt}	% draw solid circle if boxed
            \else
                \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \fi
            \pgfpathcircle{\pgfpoint{0}{0}} {0.5\pgf@circ@res@step}
            \pgf@circ@draworfill

            % inner arrow
            \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
            \pgfsetlinewidth{\pgfstartlinewidth}

            \pgfsetarrowsend{latex}
            \pgfpathmoveto{\pgfpoint{-0.25\pgf@circ@res@step}{0}}
            \pgfpatharc{180}{-90} {0.25\pgf@circ@res@step}
            \pgfpathlineto{\pgfpoint{-5pt}{-0.2\pgf@circ@res@step}}
            \pgfusepath{draw}

            \endpgfscope
        }
    }


% Wilkinson divider
\pgfdeclareshape{wilkinson}{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{%
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \pgf@y=\ctikzvalof{tripoles/wilkinson/height}\pgf@circ@scaled@Rlen
        \pgf@y=.5\pgf@y
        \pgf@x= \pgf@circ@scaled@Rlen
        \pgf@x=.5\pgf@x
        \pgf@x=-\ctikzvalof{tripoles/wilkinson/width}\pgf@x
    }
    \anchor{center}{
        \northwest
        \pgf@x=0pt
        \pgf@y=0pt
    }
    \anchor{north}{
        \northwest
        \pgf@x=0pt
    }
    \anchor{south}{
        \northwest
        \pgf@x=0pt
        \pgf@y=-\pgf@y
    }
    \anchor{west}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{east}{
        \northwest
        \pgf@y=0pt
        \pgf@x=-\pgf@x
    }
    \anchor{south west}{
        \northwest
        \pgf@y=-\pgf@y
    }
    \anchor{north east}{
        \northwest
        \pgf@x=-\pgf@x
    }
    \anchor{north west}{
        \northwest
    }
    \anchor{south east}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=-\pgf@y
    }
    \anchor{in}{
        \northwest
        \pgf@y=0pt
    }
    \anchor{out1}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=-0.5\pgf@y
    }
    \anchor{out2}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@y=0.5\pgf@y
    }
    \anchor{text}{
        \northwest
        \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
        \pgf@x=-.5\wd\pgfnodeparttextbox
    }
    \backgroundpath{
        \pgfsetcolor{\ctikzvalof{color}}
        \pgf@circ@scaled@Rlen=\scaledRlen

        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x

        \pgfstartlinewidth=\pgflinewidth

        % draw outer box
        \pgf@circ@twoportbox

        % draw inner stuff
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}

        \pgfusepath{draw}

        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        % draw inner resisitor - european or american style is recognised
        {
            \pgftransformshift{\pgfpoint{0.5\pgf@circ@res@right}{0pt}}
            \pgftransformrotate{90}

            % calculate size of resistor
            \ifpgf@circuit@europeanresistor
                \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/generic/width} / 2}
                \pgftransformscale{\pgfmathresult}
                \pgfnode{genericshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
            \else
                \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/resistor/width} / 2}
                \pgftransformscale{\pgfmathresult}
                \pgfnode{resistorshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
            \fi
        }

        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpointanchor{wilk@int@R}{right}}

        \pgfpathmoveto{\pgfpointanchor{wilk@int@R}{left}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfusepath{draw}

    }
}

%% couplers generics
\long\def\pgfcircdeclarefourport#1#2{

    \pgfdeclareshape{#1}{
        \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
        \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
        \anchor{center}{
            \northwest
            \pgf@x=0pt
            \pgf@y=0pt
        }
        \savedanchor\northwest{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/#1/height}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=.5\pgf@circ@scaled@Rlen
            \pgf@x=-\ctikzvalof{quadpoles/#1/width}\pgf@x
        }
        \anchor{north}{
            \northwest
            \pgf@x=0pt
        }
        \anchor{south}{
            \northwest
            \pgf@x=0pt
            \pgf@y=-\pgf@y
        }
        \anchor{west}{
            \northwest
            \pgf@y=0pt
        }
        \anchor{east}{
            \northwest
            \pgf@y=0pt
            \pgf@x=-\pgf@x
        }
        \anchor{south west}{
            \northwest
            \pgf@y=-\pgf@y
        }
        \anchor{north east}{
            \northwest
            \pgf@x=-\pgf@x
        }
        \anchor{north west}{
            \northwest
        }
        \anchor{south east}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=-\pgf@y
        }
        \anchor{port1}{
            \northwest
            \pgf@y=-0.5\pgf@y
        }
        \anchor{port2}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=-0.5\pgf@y
        }
        \anchor{port3}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=0.5\pgf@y
        }
        \anchor{port4}{
            \northwest
            \pgf@y=0.5\pgf@y
        }
        \anchor{1}{
            \northwest
            \pgf@y=-0.5\pgf@y
        }
        \anchor{2}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=-0.5\pgf@y
        }
        \anchor{3}{
            \northwest
            \pgf@x=-\pgf@x
            \pgf@y=0.5\pgf@y
        }
        \anchor{4}{
            \northwest
            \pgf@y=0.5\pgf@y
        }

        \anchor{text}{
            \northwest
            \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
            \pgf@x=-.5\wd\pgfnodeparttextbox
        }
        \backgroundpath{
            \pgfsetcolor{\ctikzvalof{color}}

            \northwest
            \pgf@circ@res@up = \pgf@y
            \pgf@circ@res@down = -\pgf@y
            \pgf@circ@res@right = -\pgf@x
            \pgf@circ@res@left = \pgf@x
            \pgf@circ@scaled@Rlen=\scaledRlen

            \pgfstartlinewidth=\pgflinewidth

            % draw outer box
            \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \pgfpathrectanglecorners{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
            \pgf@circ@draworfill

            % draw inner stuff
            #2

            % draw inner text
            \pgftext[center,x=-0.15\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
        }
    }
}

% four-port
\pgfcircdeclarefourport{fourport}{}

% straight coupler
\pgfcircdeclarefourport{coupler}{
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
    \pgfusepath{draw}

    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfsetarrows{latex-latex}
    \pgfusepath{draw}
    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@down}}
    \pgfsetarrows{latex-latex}
    \pgfusepath{draw}
}

% "bended" coupler
\pgfcircdeclarefourport{coupler2}{
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
    \pgfusepath{draw}

    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
        \pgfpatharc{0}{90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
        \pgfpatharc{0}{-90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
        \pgfpatharc{180}{90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
        \pgfpatharc{-180}{-90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
}

