% Copyright 2026 by Qrrbrbirlbel
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Free Documentation License.
%
\unless\ifcsname pgfextset\endcsname
  \input tikzext-util.tex
\fi
\pgfextset{
    circle arrow start angle/.initial=,
    circle arrow end angle/.initial=,
    circle arrow delta angle/.initial=,
    circle arrow arrows/.initial=-,
    circle arrow/@turn left/.style={/pgf/ext/circle arrow arrows=->,/pgf/ext/circle arrow delta angle=340},
    circle arrow/@turn right/.style={/pgf/ext/circle arrow arrows=<-,/pgf/ext/circle arrow delta angle=340},
    circle arrow turn left north/.style  = {/pgf/ext/circle arrow/@turn left,  /pgf/ext/circle arrow start angle=100},
    circle arrow turn left east/.style   = {/pgf/ext/circle arrow/@turn left,  /pgf/ext/circle arrow start angle=10},
    circle arrow turn left south/.style  = {/pgf/ext/circle arrow/@turn left,  /pgf/ext/circle arrow start angle=280},
    circle arrow turn left west/.style   = {/pgf/ext/circle arrow/@turn left,  /pgf/ext/circle arrow start angle=190},
    circle arrow turn right north/.style = {/pgf/ext/circle arrow/@turn right, /pgf/ext/circle arrow start angle=100},
    circle arrow turn right east/.style  = {/pgf/ext/circle arrow/@turn right, /pgf/ext/circle arrow start angle=10},
    circle arrow turn right south/.style = {/pgf/ext/circle arrow/@turn right, /pgf/ext/circle arrow start angle=280},
    circle arrow turn right west/.style  = {/pgf/ext/circle arrow/@turn right, /pgf/ext/circle arrow start angle=190},
}
\pgfdeclareshape{ext_circle arrow}{
    \inheritsavedanchors[from=circle]
    \inheritanchorborder[from=circle]
    \inheritanchor[from=circle]{north}
    \inheritanchor[from=circle]{north west}
    \inheritanchor[from=circle]{north east}
    \inheritanchor[from=circle]{center}
    \inheritanchor[from=circle]{west}
    \inheritanchor[from=circle]{east}
    \inheritanchor[from=circle]{mid}
    \inheritanchor[from=circle]{mid west}
    \inheritanchor[from=circle]{mid east}
    \inheritanchor[from=circle]{base}
    \inheritanchor[from=circle]{base west}
    \inheritanchor[from=circle]{base east}
    \inheritanchor[from=circle]{south}
    \inheritanchor[from=circle]{south west}
    \inheritanchor[from=circle]{south east}
    \backgroundpath{
        \pgfkeysgetvalue{/pgf/ext/circle arrow start angle}\pgf@sh@circlearrow@s
        \pgfkeysgetvalue{/pgf/ext/circle arrow end angle}\pgf@sh@circlearrow@e
        \pgfkeysgetvalue{/pgf/ext/circle arrow delta angle}\pgf@sh@circlearrow@d
        \ifx\pgf@sh@circlearrow@s\pgfutil@empty%
            \pgfmathsetmacro\pgf@sh@circlearrow@s{\pgf@sh@circlearrow@e-\pgf@sh@circlearrow@d}%
        \else
            \ifx\pgf@sh@circlearrow@e\pgfutil@empty%
                \pgfmathsetmacro\pgf@sh@circlearrow@e{\pgf@sh@circlearrow@s+\pgf@sh@circlearrow@d}%
            \fi%
        \fi
        \pgfutil@tempdima=\radius
        \pgfmathsetlength{\pgf@xb}{\pgfkeysvalueof{/pgf/outer xsep}}%
        \pgfmathsetlength{\pgf@yb}{\pgfkeysvalueof{/pgf/outer ysep}}%
        \ifdim\pgf@xb<\pgf@yb
          \advance\pgfutil@tempdima by-\pgf@yb
        \else
          \advance\pgfutil@tempdima by-\pgf@xb
        \fi
        \pgfpathmoveto{\pgfpointadd{\centerpoint}{\pgfpointpolar{\pgf@sh@circlearrow@s}{\pgfutil@tempdima}}}%
        \pgfpatharc{\pgf@sh@circlearrow@s}{\pgf@sh@circlearrow@e}{\pgfutil@tempdima}%
        \pgfkeysgetvalue{/pgf/ext/circle arrow arrows}\pgf@temp
        \expandafter\pgfsetarrows\expandafter{\pgf@temp}%
    }
}

%%% Compatibility
\tikzextset{
  /tikz-ext/compat/add library*={shapes.circlearrow}{shapes}{pre 0.6},
  compat/shapes.circlearrow/warn/.code={%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn left  north}{/pgf/ext/circle arrow turn left  north}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn left   east}{/pgf/ext/circle arrow turn left   east}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn left   west}{/pgf/ext/circle arrow turn left   west}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn left  south}{/pgf/ext/circle arrow turn left  south}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn right north}{/pgf/ext/circle arrow turn right north}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn right  east}{/pgf/ext/circle arrow turn right  east}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn right  west}{/pgf/ext/circle arrow turn right  west}%
    \tikzextutil@compatwarning@key{shapes}{pre 0.6}{/pgf/circle arrow turn right south}{/pgf/ext/circle arrow turn right south}%
    \tikzextutil@compatwarning@valuekey{shapes}{pre 0.6}{/pgf/circle arrow start angle}{/pgf/ext/circle arrow start angle}%
    \tikzextutil@compatwarning@valuekey{shapes}{pre 0.6}{/pgf/circle arrow delta angle}{/pgf/ext/circle arrow delta angle}%
    \tikzextutil@compatwarning@valuekey{shapes}{pre 0.6}{/pgf/circle arrow end   angle}{/pgf/ext/circle arrow end   angle}%
    \tikzextutil@compatwarning@valuekey{shapes}{pre 0.6}{/pgf/circle arrow arrows}     {/pgf/ext/circle arrow arrows}%
    \tikzextutil@compat@cloneshape{circle arrow}{text,north,north west,north east,center,west,east,mid,mid west,mid east,base,base west,base east,south,south west,south east,center}%
    \def\tikzext@temp{\tikzextutil@compatmaybewarning{shape 'circle arrow'}{'ext_circle arrow'}{shapes = pre 0.6}}%
    \expandafter\tikzextutil@prefix@macrotomacro\csname pgf@sh@s@circle arrow\endcsname\tikzext@temp
  },
  compat/shapes.circlearrow/pre 0.6/.code={%
    \pgfkeysdef{/pgf/circle arrow turn left  north}{\pgfkeysvalueof{/pgf/ext/circle arrow turn left  north/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn left   east}{\pgfkeysvalueof{/pgf/ext/circle arrow turn left   east/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn left   west}{\pgfkeysvalueof{/pgf/ext/circle arrow turn left   west/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn left  south}{\pgfkeysvalueof{/pgf/ext/circle arrow turn left  south/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn right north}{\pgfkeysvalueof{/pgf/ext/circle arrow turn right north/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn right  east}{\pgfkeysvalueof{/pgf/ext/circle arrow turn right  east/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn right  west}{\pgfkeysvalueof{/pgf/ext/circle arrow turn right  west/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow turn right south}{\pgfkeysvalueof{/pgf/ext/circle arrow turn right south/.@cmd}##1\pgfeov}%
    \pgfkeysdef{/pgf/circle arrow start angle}{\pgfkeyssetvalue{/pgf/ext/circle arrow start angle}{##1}}%
    \pgfkeysdef{/pgf/circle arrow delta angle}{\pgfkeyssetvalue{/pgf/ext/circle arrow delta angle}{##1}}%
    \pgfkeysdef{/pgf/circle arrow end   angle}{\pgfkeyssetvalue{/pgf/ext/circle arrow end   angle}{##1}}%
    \pgfkeysdef{/pgf/circle arrow arrows}     {\pgfkeyssetvalue{/pgf/ext/circle arrow arrows}{##1}}%
    \pgfkeyssetvalue{/pgf/circle arrow start angle}{\pgfkeysvalueof{/pgf/ext/circle arrow start angle}}%
    \pgfkeyssetvalue{/pgf/circle arrow delta angle}{\pgfkeysvalueof{/pgf/ext/circle arrow delta angle}}%
    \pgfkeyssetvalue{/pgf/circle arrow end   angle}{\pgfkeysvalueof{/pgf/ext/circle arrow end   angle}}%
    \pgfkeyssetvalue{/pgf/circle arrow arrows}     {\pgfkeysvalueof{/pgf/ext/circle arrow arrows}}%
    \tikzextutil@compat@cloneshape{circle arrow}{text,north,north west,north east,center,west,east,mid,mid west,mid east,base,base west,base east,south,south west,south east,center}%
  },
  compat/shapes.circlearrow/\pgfkeysvalueof{/tikz/ext/compat/shapes}/.try%
}