% Copyright 2018--2020 Marcel Krueger
%
% 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 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is Marcel Krueger
%
\RequirePackage{expl3}
\ProvidesExplPackage{fontawesome5}{2020/01/15}{5.12.0}{Font Awesome 5}

\RequirePackage{l3keys2e}

\keys_define:nn{fontawesome5}
{
  pro .value_forbidden:n = true,
  pro .tl_set:N = \c__fontawesome_kind_tl,
  pro .default:n = pro,
  free .value_forbidden:n = true,
  free .tl_set:N = \c__fontawesome_kind_tl,
  free .default:n = free,
  fixed .bool_set:N = \c__fontawesome_fixed_bool,
  fixed .default:n = true
}
\keys_set:nn{fontawesome5}{free}

\ProcessKeysOptions{fontawesome5}

\RequirePackage{xparse}

\str_new:N\l_fontawesome_style_str

\str_case:onTF\c_sys_engine_str{
  {luatex}{}
  {xetex}{}
}{
  \RequirePackage{fontawesome5-utex-helper}
}{
  \RequirePackage{fontawesome5-generic-helper}
}

\msg_new:nnnn{fontawesome5}{icon-not-found}
  {The~requested~icon~#1~was~not~found.}
  {Maybe~you~mistyped~the~icon~name~or~you~are~using~the~wrong~version~of~Font~Awesome~5.~
    Please~check~the~Font~Awesome~Cheatsheet~to~verify~the~spelling~of~#1.~
    If~you~want~to~use~a~Pro~icon,~you~need~to~have~Font~Awesome~5~Pro~installed~and~
    use~XeLaTeX~or~LuaLaTeX.~Then~you~can~activate~Pro~with~the~[pro]~option.~
    If~you~use~XeLaTeX~or~LuaLaTeX,~you~can~also~try~updating~the~Font~Awesome~5~font~files~
    to~make~icons~of~newer~versions~of~Font~Awesome~available.}
\msg_new:nnnn{fontawesome5}{style-substitution}
  {The~requested~icon~#1~has~been~replaced~by~the~solid~version}
  {The~icon~#1~is~not~available~in~the~style~#2.~The~solid~version~will~be~used~instead.~
    To~use~a~#2~style~#1~icon,~you~probably~need~Font~Awesome~5~Pro.~
    To~use~Pro,~you~need~to~have~Font~Awesome~5~Pro~installed~and~
    use~XeLaTeX~or~LuaLaTeX.~Then~you~can~activate~Pro~with~the~[pro]~option.}

\NewDocumentCommand\faPreselectedIcon{m s O{\str_use:N\l_fontawesome_style_str}}{
  \fontawesome_use_icon:nn{#3}{#1\IfBooleanT{#2}{-alt}}
}
\NewDocumentCommand\faIcon{s O{\str_use:N\l_fontawesome_style_str} m}{
  \fontawesome_use_icon:nn{#2}{#3\IfBooleanT{#1}{-alt}}
}
\cs_new_protected:Npn\fontawesome_set_style:n{
  \str_set:Nn\l_fontawesome_style_str
}

\NewDocumentCommand\faStyle{m}{
  \fontawesome_set_style:n{#1}
}

\cs_new_protected:Npn\faH#1{\faPreselectedIcon{h#1}}
\NewDocumentCommand\faRepeat{t{1}}{
  \faPreselectedIcon{repeat\IfBooleanT{#1}{-1}}
}
\cs_new_protected:Npn\fa__select_ii:nnn#1#2#3{
  \cs_if_exist_use:cF {fa__#1_#2#3:} {
    \faPreselectedIcon{#1}#2#3
  }
}
\cs_new_protected:Npn\fa__select:nn#1#2{
  \cs_if_exist_use:cF {fa__#1_#2:} {
    \peek_catcode:NTF 0 {
      \fa__select_ii:nnn {#1}{#2}
    }{
      \faPreselectedIcon{#1}#2
    }
  }
}
\cs_new_protected:Npn\fa__select:nw#1{
  \peek_catcode:NTF 0 {\fa__select:nn {#1}} {\faPreselectedIcon{#1}}
}

\cs_new_protected:cpn{fa__dice_1:}{\faPreselectedIcon{dice-one}}
\cs_new_protected:cpn{fa__dice_2:}{\faPreselectedIcon{dice-two}}
\cs_new_protected:cpn{fa__dice_3:}{\faPreselectedIcon{dice-three}}
\cs_new_protected:cpn{fa__dice_4:}{\faPreselectedIcon{dice-four}}
\cs_new_protected:cpn{fa__dice_5:}{\faPreselectedIcon{dice-five}}
\cs_new_protected:cpn{fa__dice_6:}{\faPreselectedIcon{dice-six}}
\RenewDocumentCommand\faDice{}{
  \fa__select:nw {dice}
}

\cs_new_protected:cpn{fa__dice-d_4:}{\faPreselectedIcon{dice-d4}}
\cs_new_protected:cpn{fa__dice-d_6:}{\faPreselectedIcon{dice-d6}}
\cs_new_protected:cpn{fa__dice-d_8:}{\faPreselectedIcon{dice-d8}}
\cs_new_protected:cpn{fa__dice-d_10:}{\faPreselectedIcon{dice-d10}}
\cs_new_protected:cpn{fa__dice-d_12:}{\faPreselectedIcon{dice-d12}}
\cs_new_protected:cpn{fa__dice-d_20:}{\faPreselectedIcon{dice-d20}}
\NewDocumentCommand\faDiceD{}{
  \fa__select:nw {dice-d}
}

\cs_new_protected:cpn{fa__wifi_0:}{\faPreselectedIcon{wifi-slash}}
\cs_new_protected:cpn{fa__wifi_1:}{\faPreselectedIcon{wifi-1}}
\cs_new_protected:cpn{fa__wifi_2:}{\faPreselectedIcon{wifi-2}}
\cs_new_protected:cpn{fa__wifi_3:}{\faPreselectedIcon{wifi}}
\NewDocumentCommand\faWifi{}{
  \fa__select:nw {wifi}
}

\cs_new_protected:cpn{fa__signal_0:}{\faPreselectedIcon{signal-slash}}
\cs_new_protected:cpn{fa__signal_1:}{\faPreselectedIcon{signal-1}}
\cs_new_protected:cpn{fa__signal_2:}{\faPreselectedIcon{signal-2}}
\cs_new_protected:cpn{fa__signal_3:}{\faPreselectedIcon{signal-3}}
\cs_new_protected:cpn{fa__signal_4:}{\faPreselectedIcon{signal-4}}
\cs_new_protected:cpn{fa__signal_5:}{\faPreselectedIcon{signal}}

\cs_new_protected:cpn{fa__signal-alt_0:}{\faPreselectedIcon{signal-alt-slash}}
\cs_new_protected:cpn{fa__signal-alt_1:}{\faPreselectedIcon{signal-alt-1}}
\cs_new_protected:cpn{fa__signal-alt_2:}{\faPreselectedIcon{signal-alt-2}}
\cs_new_protected:cpn{fa__signal-alt_3:}{\faPreselectedIcon{signal-alt-3}}
\cs_new_protected:cpn{fa__signal-alt_4:}{\faPreselectedIcon{signal-alt}}

\NewDocumentCommand\faSignalAlt{}{
  \fa__select:nw {signal-alt}
}
\NewDocumentCommand\faSignal{s}{
  \fa__select:nw {signal\IfBooleanT{#1}{-alt}}
}

% The following list is special: These are icons which are *not* part of the free version,
% but their -alt version is free.
\cs_set_protected:Npn\faArrows{\faPreselectedIcon{arrows}}
\cs_set_protected:Npn\faCloudDownload{\faPreselectedIcon{cloud-download}}
\cs_set_protected:Npn\faCloudUpload{\faPreselectedIcon{cloud-upload}}
\cs_set_protected:Npn\faExchange{\faPreselectedIcon{exchange}}
\cs_set_protected:Npn\faExpandArrows{\faPreselectedIcon{expand-arrows}}
\cs_set_protected:Npn\faExternalLink{\faPreselectedIcon{external-link}}
\cs_set_protected:Npn\faExternalLinkSquare{\faPreselectedIcon{external-link-square}}
\cs_set_protected:Npn\faLevelDown{\faPreselectedIcon{level-down}}
\cs_set_protected:Npn\faLevelUp{\faPreselectedIcon{level-up}}
\cs_set_protected:Npn\faPencil{\faPreselectedIcon{pencil}}
\cs_set_protected:Npn\faShield{\faPreselectedIcon{shield}}
\cs_set_protected:Npn\faSignIn{\faPreselectedIcon{sign-in}}
\cs_set_protected:Npn\faSignOut{\faPreselectedIcon{sign-out}}
\cs_set_protected:Npn\faSquareRoot{\faPreselectedIcon{square-root}}
\cs_set_protected:Npn\faTachometer{\faPreselectedIcon{tachometer}}
\cs_set_protected:Npn\faTicket{\faPreselectedIcon{ticket}}
% The following list is even more special: These are icons which do *not* actually exists, not even in pro,
% but they still have a free -alt version???
\cs_set_protected:Npn\faCompressArrows{\faPreselectedIcon{compress-arrows}}

\fontawesome_set_style:n{solid}
