% \iffalse meta-comment
%
% RWTH-CI -- Corporate Design for RWTH Aachen University
% ----------------------------------------------------------------------------
%
%  Copyright (C) 2025–2026 by Marei Peischl <rwth-ci@peitex.de> and Lukas C. Bossert
%
% ============================================================================
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008/05/04 or later.
%
% This work has the LPPL maintenance status `maintained'.
%
% The Current Maintainer of this work is
%   Marei Peischl rwth-ci@peitex.de
%
% The development repository can be found at
% https://gitlab.git.nrw/rwth-it-center/rwth-latex-templates/rwth-ci
% Please use the issue tracker for feedback!
%
% ============================================================================
%
% \fi
% \iffalse
%<*driver>
\ProvidesFile{rwth-fonts.dtx}
  [2026-04-03 v1.2 Fonts for RWTH-CI, Corporate Design of RWTH Aachen University]
%</driver>
%<@@=ptxcd>
%<*identification>
\NeedsTeXFormat{LaTeX2e}[2022-10-01]
%<package>\ProvidesExplPackage{rwth-fonts}{2026-04-03}{1.2}{Fonts for RWTH-CI}
%</identification>
%<*driver>
\providecommand*{\PtxcdDocDTXfiles}{rwth-fonts.dtx}
\providecommand*{\PtxcdDocTitle}{Fonts for RWTH-CI}
\input{rwth-ci.dtx}
%</driver>
% \fi
% \begin{documentation}
% \section{Font configuration – \pkg{rwth-fonts.sty}}
% \end{documentation}
% \begin{implementation}
% \iffalse
%<*initialize>
% \fi
% \begin{variable}{\g_@@_freefonts_bool,\g_@@_font_error_bool}
%   Variables corresponding to \option{freefonts}
%    \begin{macrocode}
\bool_new:N \g_@@_freefonts_bool
\bool_new:N \g_@@_font_error_bool
%    \end{macrocode}
% \end{variable}
% \iffalse
%</initialize>
%<*declareoptions>
% \fi
%    \begin{macrocode}
\keys_define:nn {ptxcd/fonts} {
%    \end{macrocode}
% \iffalse
%</declareoptions>
%<*options>
% \fi
% \end{implementation}
% \begin{documentation}
% \DescribeKeyOption{freefonts=value}{auto}
% The Corporate Design is using commercial fonts.
% To allow editing documents also on computers without a valid font license, the option \option{freefonts} provides a mechanism for this.
% By default the font selection is configured to try to use the official font if available.
% And will create a warning if the official setting is not possible.
%
% Please be aware that chcking font availability slows down the compilation process.
% You probably want to set the value to true or false to speed up.
% \end{documentation}
% \begin{implementation}
% \begin{optionenv}{freefonts}
%    \begin{macrocode}
  freefonts .choice:,
  freefonts / true .code:n = {
      \bool_gset_true:N  \g_@@_freefonts_bool
      \bool_gset_false:N \g_@@_font_error_bool
    },
  freefonts / auto .code:n = {
      \bool_gset_false:N \g_@@_freefonts_bool
      \bool_gset_false:N \g_@@_font_error_bool
    },
  freefonts / false .code:n = {
      \bool_gset_false:N \g_@@_freefonts_bool
      \bool_gset_true:N \g_@@_font_error_bool
    },
  freefonts .initial:n = auto,
  freefonts .default:n = true,
  freefonts .usage:n = load,
%    \end{macrocode}
% \end{optionenv}
% \end{implementation}
% \begin{documentation}
% \DescribeKeyOption{fontdefaults=\meta{boolean}}{false}
% Configure if this package is setting any font defaults or only adds a font family matching the requirements.
% \end{documentation}
% \begin{implementation}
% \begin{optionenv}{fontdefaults}
%    \begin{macrocode}
  fontdefaults .bool_gset:N = \g_@@_fontdefaults_bool,
  fontdefaults .initial:n = false,
  fontdefaults .default:n = true,
  fontdefaults .usage:n = load,
%    \end{macrocode}
% \end{optionenv}
% \iffalse
%</options>
%<*processoptions>
% \fi
%    \begin{macrocode}
}
\ProcessKeyOptions[ptxcd/fonts]
%    \end{macrocode}
% \iffalse
%</processoptions>
%<*body>
% \fi
% Save the sfdefault to avoid interaction with other parts of the document.
%    \begin{macrocode}
\bool_if:NF \g_@@_fontdefaults_bool {
  \let\rwth@cached@fdefault\sfdefault
}

\RequirePackage{iftex}
%    \end{macrocode}
% \changes{v1.2-dev}{2026-04-03}{Fix implementation of font choice to work the same way for all compilers.}
%    \begin{macrocode}
\ifPDFTeX
  \bool_if:NTF \g_@@_freefonts_bool {
    \RequirePackage{arimo}
  } {
    \bool_if:NTF \g_@@_font_error_bool
      {\use_ii:nnn}
      {\use:n}
    {\file_if_exist:nTF {uarial.sty}} {
      \RequirePackage[scaled]{uarial}
    } {
      \RequirePackage{arimo}
    }
  }
  \RequirePackage[T1]{fontenc}
\else
  \RequirePackage{fontspec}
  \bool_if:NTF \g_@@_freefonts_bool {
    \RequirePackage{arimo}
  } {
    \bool_if:NTF \g_@@_font_error_bool
      {\use_ii:nnn}
      {\use:n}
    {
      \fontspec_font_if_exist:nTF {Arial}
    }{
      \setsansfont[
        ItalicFont     = *-Italic ,
        BoldFont       = *-Bold ,
        BoldItalicFont = *-BoldItalic
      ]{Arial}
    }{
      \RequirePackage{arimo}
    }
  }
\fi
\bool_if:NTF \g_@@_fontdefaults_bool {
  \renewcommand*{\familydefault}{\sfdefault}
} {
  \let\rwth@sffamily\sfdefault
  \let\rwth@cached@sfdefault\sfdefault
}
\RequirePackage{anyfontsize}
%    \end{macrocode}
% %^^A\cite[22,24]{rwth-ci-basics}
% The Design Guideline does not allow any use of italic text.
% \cs{emph} is configured to use bold text instead.
%    \begin{macrocode}
\DeclareEmphSequence{\bfseries}

\cs_if_exist:NF \ptxcd@OrigLaTeXLogo {
  \bool_if:NF \g_@@_use_LaTeX_Logo_bool {
    \let\ptxcd@OrigLaTeXLogo\LaTeX
    \let\ptxcd@OrigTeXLogo\TeX
    \renewcommand*\LaTeX{LaTeX}
    \renewcommand*\TeX{TeX}
  }
}
%    \end{macrocode}
% \iffalse
%</body>
% \fi
% \end{implementation}
% \Finale
\endinput