\ProvidesPackage{biblatex-ext-oasymb-pict2e}
  [2024/03/24 v0.18 open access symbols with pict2e (MW)]

\RequirePackage{etoolbox}
\RequirePackage{kvoptions}

% Internals called 'extblx@oasymb@pict' instead of
% 'extblx@oasymb@pict2e' to avoid the non-letter "2".

\protected\def\extblx@oasymb@pict@error#1#2{%
  \PackageError{biblatex-ext-oasymb-pict2e}{#1}{#2.}}

\protected\def\extblx@oasymb@pict@warning@noline{%
  \PackageWarningNoLine{biblatex-ext-oasymb-pict2e}}

\let\extblx@oasymb@pict@warning\extblx@oasymb@pict@warning@noline
\AtEndOfPackage{%
  \protected\def\extblx@oasymb@pict@warning{%
    \PackageWarning{biblatex-ext-oasymb-pict2e}}}

\RequirePackage{pict2e}
\RequirePackage{xcolor}

% PLoS Open Access symbol based on
% https://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg
% public domain/CC0 by PLoS & Wikipedia users Nina, Beao and JakobVoss
\definecolor{extblx@oasymb@pict@plos@orange}{HTML}{f68212}
\newcommand*{\extblx@oasymb@pict@plos@pict}{%
  \begingroup
  \setlength{\unitlength}{.1pt}%
  \begin{picture}(64,99)
    \color{extblx@oasymb@pict@plos@orange}%
    \moveto(47,73)\circlearc{32}{73}{15}{000}{180}%
    \lineto(6,73)\circlearc{32}{73}{26}{180}{0}%
    \moveto(47,47)\lineto(58,47)\lineto(58,73)\lineto(47,73)\closepath
    \moveto(64,32)
    \circlearc{32}{32}{32}{000}{360}%
    \circlearc{32}{32}{21}{360}{000}%
    \moveto(41,32)
    \circlearc{32}{32}{09}{000}{360}%
    \fillpath
  \end{picture}%
  \endgroup
}

\newsavebox{\extblx@oasymb@pict@plos@box}
\sbox{\extblx@oasymb@pict@plos@box}{\extblx@oasymb@pict@plos@pict}
\newcommand*{\extblx@oasymb@pict@plos}{%
  \usebox{\extblx@oasymb@pict@plos@box}}

% PLoS symbols is standard
\newcommand*{\oasymbol}{\extblx@oasymb@pict@plos}

% Open-Acess.net Open Acess symbol
% redrawn with pict2e from
% http://open-access.net/fileadmin/logos/oa.svg
% public domain according to
% https://commons.wikimedia.org/wiki/File:Open_access.svg
% might be covered by open-access.net's overall CC-BY 4.0 license
% (https://creativecommons.org/licenses/by/4.0/)
% see https://open-access.net/impressum/
% the site states no specific conditions for use of the logo
% other than
%   "Das Logo der Informationsplattform darf nachgenutzt werden,
%    gerne mit einem Link zu open-access.net"
% on https://open-access.net/ueber-uns/
% see also https://open-access.net/community/materialien/
% logo by
% Medien + Design
% Center for Digital Systems
% Competence Center for E-Learning and Multimedia
% Freie Universität Berlin
\definecolor{extblx@oasymb@pict@oanet@green}{HTML}{356031}
\definecolor{extblx@oasymb@pict@oanet@gold}{HTML}{f9c63a}
\definecolor{extblx@oasymb@pict@oanet@intersect}{HTML}{89923a}

\newcommand*{\extblx@oasymb@pict@oanet@pict}{%
  \begingroup
  \setlength{\unitlength}{1.1pt}%
  \begin{picture}(15,8)
    \color{extblx@oasymb@pict@oanet@green}%
    \moveto(08.3,04)
    \circlearc{04}{04}{4.3}{000}{360}%
    \circlearc{04}{04}{2.7}{360}{000}%
    \fillpath
    \color{extblx@oasymb@pict@oanet@gold}%
    \moveto(15.3,04)
    \circlearc{11}{04}{4.3}{000}{300}%
    \circlearc{11}{04}{2.7}{300}{000}%
    \lineto(13.7,-.1)\lineto(15.3,-.1)
    \fillpath
    \color{extblx@oasymb@pict@oanet@intersect}
    \moveto(8.3,4)
    \circlearc{11}{04}{4.3}{144.5}{215.5}%
    \circlearc{04}{04}{4.3}{-035.5}{035.5}%
    \fillpath
  \end{picture}%
  \endgroup
}

\newsavebox{\extblx@oasymb@pict@oanet@box}
\sbox{\extblx@oasymb@pict@oanet@box}{\extblx@oasymb@pict@oanet@pict}
\newcommand*{\extblx@oasymb@pict@oanet}{%
  \usebox{\extblx@oasymb@pict@oanet@box}}

\protected\def\extblx@oasymb@pict@opt@symbol@process#1{%
  \begingroup
  \edef\extblx@oasymb@pict@tempa{\endgroup
    \noexpand\extblx@oasymb@pict@opt@symbol@process@i{#1}}%
  \extblx@oasymb@pict@tempa}

\def\extblx@oasymb@pict@opt@symbol@process@i#1{%
  \ifcsundef{extblx@oasymb@pict@#1}
    {\extblx@oasymb@pict@error
      {Unknown value\MessageBreak
       \space\space'#1'\MessageBreak
       for option 'symbol'}
      {The symbol '#1' does not exist.\MessageBreak
       Please consult the documentation for a list of valid options}}
    {\edef\oasymbol{%
       \expandonce{\csname extblx@oasymb@pict@#1\endcsname}}}}

\newrobustcmd*{\DefineOASymbol}[1][plos]{%
  \begingroup
  \edef\extblx@oasymb@pict@tempa{\endgroup
    \noexpand\extblx@oasymb@pict@DefineOASymbol@i{#1}}%
  \extblx@oasymb@pict@tempa}

\protected\def\extblx@oasymb@pict@DefineOASymbol@i#1{%
  \ifcsundef{extblx@oasymb@pict@#1}
    {\extblx@oasymb@pict@error
      {Unknown symbol option\MessageBreak
       \space\space'#1'}
      {The symbol '#1' does not exist.\MessageBreak
       Please consult the documentation for a list of valid options}}
    {\edef\oasymbol{%
       \expandonce{\csname extblx@oasymb@pict@#1\endcsname}}}}

\SetupKeyvalOptions{
  family=extblx@oasymb@pict@opt,
  prefix=extblx@oasymb@pict@opt@,
}

\DeclareStringOption[plos]{symbol}
\DeclareVoidOption{plos}{\csdef{extblx@oasymb@pict@opt@symbol}{plos}}
\DeclareVoidOption{oanet}{\csdef{extblx@oasymb@pict@opt@symbol}{oanet}}

\ProcessKeyvalOptions*

\extblx@oasymb@pict@opt@symbol@process{%
  \csuse{extblx@oasymb@pict@opt@symbol}}

\endinput
%
% This file is part of the biblatex-ext bundle.
% biblatex-ext is released under the LaTeX Project Public License v1.3c
% or later.
%
% A complete list of files included in that package can be found in
% README.md or - failing that - in ext-standard.bbx.
%
% Official releases of this package are on CTAN
%   https://www.ctan.org/pkg/biblatex-ext
% development takes place on GitHub
%   https://github.com/moewew/biblatex-ext
%