\ProvidesPackage{PlayfairDisplay}[%
   2022/09/28 (Bob Tennent)  Supports PlayfairDisplay fonts for all LaTeX engines. ] 

\RequirePackage{ifxetex,ifluatex,textcomp}

\newif\ifplayfair@otf
\ifxetex
  \playfair@otftrue
\else\ifluatex
  \playfair@otftrue
\else  % [pdf]LaTeX
  \playfair@otffalse
\fi\fi

\newcommand*{\PlyfrDisplay@scale}{1}  
\RequirePackage{xkeyval}
\DeclareOptionX{scaled}{\renewcommand*{\PlyfrDisplay@scale}{#1}}
\DeclareOptionX{scale}{\renewcommand*{\PlyfrDisplay@scale}{#1}}

\newif\ifplayfair@black \playfair@blackfalse

\DeclareOptionX{type1}{\playfair@otffalse}
\DeclareOptionX{black}{\playfair@blacktrue}

\newif\ifplayfair@lining \playfair@liningtrue

\DeclareOptionX{lining}[true]{%
\@nameuse{if#1}%
  \playfair@liningtrue
\else
  playfair@liningfalse
\fi
}
\DeclareOptionX{lf}[true]{%
\@nameuse{if#1}%
  \playfair@liningtrue
\else
  playfair@liningfalse
\fi
}
\DeclareOptionX{oldstyle}[true]{%
\@nameuse{if#1}%
  \playfair@liningfalse
\else
  \playfair@liningtrue
\fi
}

\DeclareOptionX{osf}[true]{%
\@nameuse{if#1}%
  \playfair@liningfalse
\else
  \playfair@liningtrue
\fi
}

\ProcessOptionsX\relax

\ifplayfair@otf
  \ifplayfair@lining
    \def\playfair@figurestyle{Lining}
  \else
    \def\playfair@figurestyle{OldStyle}
  \fi
  \ifplayfair@black
    \def\playfair@boldstyle{Black}
  \else
    \def\playfair@boldstyle{Bold}
  \fi

\else % type1

  \ifplayfair@lining
    \def\playfair@figurestyle{LF} 
  \else
    \def\playfair@figurestyle{OsF} 
  \fi
  \ifplayfair@black
    \def\bfseries@rm{black}
  \else
    \def\bfseries@rm{b}
  \fi
\fi


\ifplayfair@otf
  \RequirePackage{fontspec}
\else
  \RequirePackage{fontenc,fontaxes,mweights}
\fi

% Set main and/or sans fonts:
\ifplayfair@otf

  \defaultfontfeatures{
     Ligatures = TeX ,
     Scale     = \PlyfrDisplay@scale ,
     Extension = .otf ,
  }
  \setmainfont
      [ Numbers = {\playfair@figurestyle}, 
        UprightFont    = *-Regular ,
        ItalicFont     = *-Italic ,
        BoldFont       = *-\playfair@boldstyle , 
        BoldItalicFont = *-\playfair@boldstyle Italic ]
      {PlayfairDisplay}
  \newfontfamily\playfairblack
      [ Numbers = {\playfair@figurestyle}, 
        UprightFont    = *-Black ,
        ItalicFont     = *-BlackItalic ,
        BoldFont       = *-\playfair@boldstyle , 
        BoldItalicFont = *-\playfair@boldstyle Italic ]
      {PlayfairDisplay}
   \providecommand\sufigures{\addfontfeatures{VerticalPosition=Superior}}
   \newfontfamily\playfairOsF
      [ Numbers = {OldStyle},
        UprightFont    = *-Regular ,
        ItalicFont     = *-Italic ,
        BoldFont    = *-Regular ,
        BoldItalicFont     = *-Italic ,
      ]
      {PlayfairDisplay}
   \newfontfamily\playfairLF
      [ Numbers = {Lining},
        UprightFont    = *-Regular ,
        ItalicFont     = *-Italic ,
        BoldFont    = *-Regular ,
        BoldItalicFont     = *-Italic ,
      ]
      {PlayfairDisplay}



\else % type1

  \fa@naming@exception{figures}{{superior}{proportional}}{Sup}
  \fa@naming@exception{figures}{{superior}{tabular}}{Sup}
  \def\sufigures{\@nomath\sufigures\fontfigurestyle{superior}\selectfont}

  \def\playfairfamily{PlyfrDisplay-\playfair@figurestyle}

  \renewcommand*\rmdefault{\playfairfamily}

  \newcommand*\playfair{\fontfamily{\playfairfamily}\selectfont}
  \newcommand*\playfairblack{\fontfamily{\playfairfamily}\fontseries{black}\selectfont}
  \newcommand*\playfairOsF{\fontfamily{PlyfrDisplay-OsF}\selectfont}
  \newcommand*\playfairLF{\fontfamily{PlyfrDisplay-LF}\selectfont}


\fi

\DeclareTextFontCommand{\textsu}{\sufigures}
\let\textsuperior\textsu

% turn off defaults in case other fonts are selected:
\ifplayfair@otf
  \defaultfontfeatures{}
\fi

\endinput