\NeedsTeXFormat{LaTeX2e}

%\traceon
%Package to simplify loading of newpxmath with a text font family such as newpxtext for all LaTeX engines, or for newpxtext and an otf math package.
\def\fileversion{1.551}
\def\filedate{2025/10/30}
\ProvidesPackage{newpx}[%
\filedate\space v\fileversion\space  LaTeX and unicode LaTeX support for newpxmath and newpxtext, or for newpxtext and an otf math package (Michael Sharpe)]

\message{`newpx'v\fileversion,\space\filedate\space Integrated\space loading\space of\space newpxmath\space and\space a\space text\space font
\space for\space all\space latex\space engines\space (msharpe)}

\RequirePackage{fontenc,fontaxes}
\RequirePackage{ifthen,iftex,etoolbox,scalefnt,trimspaces}

\forcsvlist{\listadd\zpl@mathlst}{vecsep,amsthm,nosubscriptcorrection,subscriptcorrection,varbb,vvarbb,nosymbolsc,noamssymbols,amssymbols,uprightscript,uprightGreek,slantedGreek,frenchmath,upint,smallerops,useBImacros,varg,varvw,noOT1,fracspacing,subscriptcorrectionfile,curlybraces,boldermath}

\RequirePackage{kvoptions}
\def\zpl@scale{1}
\def\newpx@helvratio{1}
\DeclareDefaultOption{
\xifinlist{\CurrentOptionKey}{\zpl@mathlst}
{% true branch for xifinlist
\expandafter\PassOptionsToPackage\expandafter{\CurrentOption}{newpxmath}}
{%  false branch for xifinlist
%\xdef\zpl@Topt{\zpl@Topt \CurrentOption,}
\expandafter\PassOptionsToPackage\expandafter%
{\CurrentOption}{newpxtext}}
\ifthenelse{\equal{scale}{\CurrentOptionKey} \OR \equal{scaled}{\CurrentOptionKey}}
{% true branch for ifthenelse
\xdef\zpl@scale{\CurrentOptionValue}
\xdef\npxmath@scaled{\CurrentOptionValue}
}{ % false branch for ifthenelse
\ifthenelse{\equal{helvratio}{\CurrentOptionKey}}
{% true branch
\xdef\newpx@helvratio{\CurrentOptionValue}
}{}}}
  \def\zpl@scaled{s*[\zpl@scale]}% used in fd files

%\newif\ifnewpx@otfmath %\zpl@otfmathfalse % default is type1 math
\DeclareBoolOption{otfmath}% creates and inits \ifnewpx@otfmath 
{\@nameuse{if#1}\iftutex\newpx@otfmathtrue\fi}
\DeclareBoolOption{nohelv}% creates and inits \ifnewpx@nohelv 
\DeclareBoolOption{nott}% creates and inits \ifnewpx@nott 

\DeclareBoolOption{type1}%[true]{}% no effect now
%{%\@nameuse{if#1}\zpl@otftextfalse\fi}

\DeclareBoolOption{type1text}%[true]{} %no effect now
%{% same as type1--use type1 for text
%\@nameuse{if#1}\zpl@otftextfalse\fi}

\DeclareBoolOption{nofontspec}%[true]{} % no effect
%{\@nameuse{if#1}\zpl@nofontspectrue\fi}

\ProcessKeyvalOptions{newpx}

\RequirePackage{xstring}% must load this after \@for
% Needed for \StrLeft and \StrRight

%Enginecheck
%iftex's \iftutex is true for LuaTeX and XeTeX
\newif\ifzpl@otftext
\iftutex\zpl@otftexttrue\fi 

%\newcommand{\PassMathScale}{\ifzpl@iszero\gdef\zpltext@scale{\zplmath@scale}\gdef\zpltext@scaled{s*[\zpltext@scale]}\fi
%\PassOptionsToPackage{scaled=\zpltext@scale}{\zpl@TF}
%}

\ifnewpx@otfmath
\else % t1 math
   \ifthenelse{\not\equal{\sfdefault}{cmss}}%
      {\newpx@nohelvtrue}{}
    \ifthenelse{\not\equal{\ttdefault}{cmtt}}%
      {\newpx@notttrue}{}
    \ifnewpx@nohelv
    \else
      \renewcommand*{\sfdefault}{qhv}
      \@tempdima=\zpl@scale\p@
      \@tempdima=\newpx@helvratio\@tempdima%
      \edef\qhv@scale{\strip@pt\@tempdima}
    \fi %\ifnewpx@nohelv
    \ifnewpx@nott\else%
      \renewcommand*{\ttdefault}{npxtt}
    \fi
\fi %\ifnewpx@otfmath

\ifthenelse{\boolean{zpl@otftext}}
	{%then clause ( otf text )
	\ifthenelse{\boolean{newpx@otfmath}}
		{% then clause (otf math and text)
		\typeout{I}
    	\usepackage[]{newpxtext} %may not load fontspec
    	\usepackage{unicode-math} %loads amsmath
		}
		{% else clause (t1 math, otf text)
		\typeout{II}
    	\renewcommand*{\rmdefault}{minzpl} % Roman and Bold text for math
    	\usepackage[]{newpxmath} % options will be as passed from newpx
    	\usepackage[no-math]{fontspec}
    	\usepackage{newpxtext}
		}
	}
    {%else clause  (type1 text and math)
    \typeout{IV}
    \renewcommand*{\rmdefault}{minzpl}% Roman and Bold for math
    \usepackage{newpxmath} % options will be as passed from newpx
    \usepackage{newpxtext} % should load tt and sans math before newpx
    }

%\ifzpl@otftext\else % not otftext so type1 tex and math
%    \typeout{IV}
%    \renewcommand*{\rmdefault}{minzpl}% Roman and Bold for math
%    \usepackage{newpxmath} % options will be as passed from newpx
%    \usepackage{newpxtext} % should load tt and sans math before newpx
%\fi
%% The above covers the non-tutex case
%\ifzpl@otftext
%  \ifnewpx@otfmath %
%    \typeout{I}
%    \usepackage[]{newpxtext} %may not load fontspec
%    \usepackage{unicode-math} %loads amsmath
%  \else %II: type1 math, otftext
%    \typeout{II}
%    \renewcommand*{\rmdefault}{minzpl} % Roman and Bold text for math
%    \usepackage[]{newpxmath} % options will be as passed from newpx
%    \usepackage[no-math]{fontspec}
%    \usepackage{newpxtext}
%  \fi %ifzpl@otfmath
%\fi %ifzpl@otftext


\endinput
