\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{Oswald}
    [2021/10/17 (Carl-Clemens Ebinger and autoinst)  Style file for Oswald fonts.]

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

\DeclareOptionX{lining}{\edef\Zeroswald@figurestyle{LF}}
\DeclareOptionX{tabular}{\edef\Zeroswald@figurealign{T}}
\DeclareOptionX{mainfont}{
    \renewcommand{\familydefault}{\sfdefault}
}
\DeclareOptionX{semibold}{\edef\bfseries@rm{semibold}}
\DeclareOptionX{bold}{\edef\bfseries@rm{bold}}
\DeclareOptionX{medium}{\edef\mdseries@rm{medium}}
\DeclareOptionX{regular}{\edef\mdseries@rm{regular}}
\ExecuteOptionsX{lining,tabular}
\ProcessOptionsX\relax

\RequirePackage{fontenc,textcomp}
\RequirePackage{ifthen}
\RequirePackage{mweights}

\IfFileExists{fontaxes.sty}{
    \RequirePackage{fontaxes}
    \fa@naming@exception{figures}{{superior}{proportional}}{Sup}
    \fa@naming@exception{figures}{{superior}{tabular}}{Sup}
    \def\supfigures{\@nomath\supfigures
        \fontfigurestyle{superior}\selectfont}
    \let\sufigures\supfigures
    \DeclareTextFontCommand{\textsup}{\supfigures}
    \let\textsu\textsup
    \let\textsuperior\textsup

}{}

%   Here we implement the scale=MatchLowercase option.
%   If this is given, we must compute the correct value of
%   the "\Zeroswald@scale" parameter before loading the .fd files;
%   but to determine that value we of course need the font's x-height.
%   To avoid triggering the loading of .fd files,
%   we use plain TeX's \font primitive to load the testfont.
%   We then compute the ratio of the current x-height to our font's x-height;
%   this is the "\Zeroswald@scale" we will pass to the .fd files.
\ifthenelse{\equal{\Zeroswald@scale}{MatchLowercase}}
    {   \newlength{\Zeroswald@currentx}
        \settoheight{\Zeroswald@currentx}{x}
        \newlength{\Zeroswald@xheight}
        \settoheight{\Zeroswald@xheight}
            {{\font\testfont=0swald-Regular-tlf-ot1 at \f@size pt\testfont x}}
        \renewcommand*{\Zeroswald@scale}
            {\strip@pt\dimexpr\number\numexpr\number\dimexpr\Zeroswald@currentx\relax*65536/\number\dimexpr\Zeroswald@xheight\relax\relax sp\relax}}
    {}

\renewcommand*
    {\sfdefault}
    {Zeroswald-\Zeroswald@figurealign\Zeroswald@figurestyle}

\endinput
