%%
%% SPDX-FileCopyrightText: 2026 Andre Anjos (github:anjos)
%%
%% SPDX-License-Identifier: LPPL-1.3c
%%
\NeedsTeXFormat{LaTeX2e}[2020/02/02]
\ProvidesPackage{geistserif}
    [2026/11/08 v1.9.2 Geist Serif support for LaTeX]

\RequirePackage{iftex}
\RequirePackage{xkeyval}
%%  Up here because packages cannot be loaded once options are declared.
\ifpdftex\else\RequirePackage{fontspec}\fi

%%  Geist Serif comes as four single-weight fonts that differ only in the shape
%%  of their dots.  variant= picks the one \rmdefault uses; \geistserifvariant
%%  switches locally.  There is no bold and no italic: NFSS falls back to the
%%  upright regular face, with its usual warning, rather than faking either.
\@namedef{geistserif@name@regular}{Regular}
\@namedef{geistserif@name@square}{Square}
\@namedef{geistserif@name@triangle}{Triangle}
\@namedef{geistserif@name@heart}{Heart}
%%  Sets \geistserif@Name to the font-name form of a variant.
\newcommand*{\geistserif@setname}[1]{%
    \@ifundefined{geistserif@name@#1}
        {\PackageError{geistserif}{Unknown variant `#1'}
            {Use regular, square, triangle or heart.}%
         \def\geistserif@Name{Regular}}
        {\edef\geistserif@Name{\@nameuse{geistserif@name@#1}}}}

\newcommand*{\geistserif@variant}{regular}
\DeclareOptionX{variant}{\renewcommand*{\geistserif@variant}{#1}}

\ifpdftex

%%  The pdfTeX branch uses the metrics generated from the TrueType fonts with
%%  autoinst, one NFSS family per variant.  Everything but variant= passes
%%  straight through to geistserif-nfss.sty.
\DeclareOptionX*{\PassOptionsToPackage{\CurrentOption}{geistserif-nfss}}
\ProcessOptionsX\relax
\RequirePackage{geistserif-nfss}

\newcommand*{\geistserifvariant}[1]{%
    \geistserif@setname{#1}%
    \fontfamily{GeistSerif\geistserif@Name-%
        \GeistSerif@figurealign\GeistSerif@figurestyle}\selectfont}
\geistserif@setname{\geistserif@variant}
\edef\rmdefault{GeistSerif\geistserif@Name-%
    \GeistSerif@figurealign\GeistSerif@figurestyle}

\else

%%  XeTeX and LuaTeX read the TrueType fonts directly.
\newcommand*{\geistserif@scale}{1}
\DeclareOptionX{scale}{\renewcommand*{\geistserif@scale}{#1}}
\DeclareOptionX{scaled}{\renewcommand*{\geistserif@scale}{#1}}
\DeclareOptionX{mainfont}{%
    \AtEndOfPackage{\renewcommand*{\familydefault}{\rmdefault}}}
%%  Figure-style options only mean anything to the NFSS branch.  Accept and
%%  ignore them here so one \usepackage line works under any engine.
\DeclareOptionX*{}
\ProcessOptionsX\relax

%%  Expand the variant before fontspec sees it: fontspec keys its font cache on
%%  the feature list as written, so an unexpanded macro there would make every
%%  variant resolve to whichever was loaded first.
\newcommand*{\geistserif@load}[1]{%
    \edef\geistserif@tmp{\noexpand#1{GeistSerif}[
        Extension   = .ttf,
        Scale       = \geistserif@scale,
        UprightFont = *-\geistserif@Name,
    ]}\geistserif@tmp}
\newcommand*{\geistserifvariant}[1]{%
    \geistserif@setname{#1}\geistserif@load\fontspec}
\geistserif@setname{\geistserif@variant}
\geistserif@load\setmainfont

\fi

\endinput