% uni-math.tex
%%%%%%%%%%%%%%%%%%
% Petr Olsak  2016

\def\unimathversion{May 2016} % Warning: this is at beta testing state

% Macros for loading Unicode math fonts in XeTeX or LuaTeX 

% usage: \def\unimathfont{Font Name} \input uni-math
% \setmathsizes[text/script/scriptscript]\normalmath
% Example: \setmathsizes[12/8.4/6]\normalmath ... loads fonts at given sizes

% Full example:
% \let\loadmathfonts=\relax               % don't load 8bit math fonts
% \input cs-pagella                       % load Pagella Text fonts
% \def\unimathfont{[texgyrepagella-math]} % declare Pagella Math font
% \input uni-math                         % load Pagella Math font
% If you are using OPmac then you can set sizes of math+text fonts as usual:
% \typosize[12/14.4] ...

\ifx\Umathcode\undefined
   \message{uni-math WARNING: Unicoded engine not detected. Macro-file ignored...}
   \endinput\fi

\def\umathname#1#2{"#1:\mfontfeatures#2"}
\def\mfontfeatures{mode=base;script=math;}

\ifx\unimathfont\relax\else % \relax ... font will be declared later
   \ifx\unimathfont\undefined \def\unimathfont{??}\fi
   \suppressfontnotfounderror=1
   \font\mF=\umathname{\unimathfont}{} \relax
   \suppressfontnotfounderror=0
   \ifx\mF\nullfont
      \message{uni-math WARNING: \string\unimathfont{\unimathfont} isn't loadable.}
      \bgroup
      \toks0={Examples:^^J 
           \def\unimathfont{[xits-math]} ... XITS MATH^^J
           \def\unimathfont{[latinmodern-math]} ... Latin Modern Math^^J
           \def\unimathfont{[texgyretermes-math]} ... TeXGyre Termes Math^^J 
           \def\unimathfont{[texgyrebonum-math]} ... TeXGyre Bonum Math^^J 
           \def\unimathfont{[texgyrepagella-math]} ... TeXGyre Pagella Math^^J 
           \def\unimathfont{[texgyreschola-math]} ... TeXGyre Schola Math^^J 
           \def\unimathfont{[Asana-Math]} ... Asana Math^^J
           \let\unimathfont=\relax ... Don't load the font right now.^^J
           Note brackets if direct file name is used. Don't use quotes "...".
      }\newlinechar=`^^J \message{\the\toks0}\message{Macrofile ignored...}
      \egroup
      \endinput\fi 
\fi

\message{FONT: \unimathfont\space - Unicode Math (v. \unimathversion) prepared.}
\let\mathpreloaded=U

\ifx\directlua\undefined \else \ifx\luafonts\undefined \input luafonts
\fi\fi

\def\normalmath{%
   \loadumathfamily 1 {\unimathfont}{} % Base font
   \loadmathfamily  4 rsfs             % script
   \setmathdimens
}
\def\boldmath{%
   \loadumathfamily 1 {\unimathfont}{embolden=1.7;} \fakeboldwarn 
   \loadmathfamily  4 rsfs             % script
   \setmathdimens
}
\def\fakeboldwarn{\ifx\directlua\undefined\else 
   \message{WARNING: Fake-bold font is not supported by LuaTeX.}\fi}

\ifx\regtmf\undefined \input ff-mac \fi

\regtfm rsfs 0 rsfs5 6 rsfs7 8.5 rsfs10 *

\count18=4  % Note: if you want to combine more Math fonts at another math family slots, 
            % don't use family 2 and 3. They are reserved for \fontdimens.

\def\loadumathfamily #1 #2#3 {
  \let\dgsize=\sizemtext    \font\mF=\umathname{#2}{#3} at\dgsize \textfont#1=\mF
  \ifnum#1=1 \textfont2=\mF \textfont3=\mF \fi
  \let\dgsize=\sizemscript  \font\mF=\umathname{#2}{+ssty=0;#3} at\dgsize 
  \scriptfont#1=\mF
  \ifnum#1=1 \scriptfont2=\mF \scriptfont3=\mF \fi
  \let\dgsize=\sizemsscript \font\mF=\umathname{#2}{+ssty=1;#3} at\dgsize 
  \scriptscriptfont#1=\mF
  \ifnum#1=1 \scriptscriptfont2=\mF \scriptscriptfont3=\mF \fi  
  \let\dgsize=\undefined
}
\def\loadmathfamily #1 #2 {\chardef\tmp#1\corrmsizes
  \let\dgsize=\sizemtext    \font\mF=\whichtfm{#2} at\dgsize \textfont#1=\mF
  \let\dgsize=\sizemscript  \font\mF=\whichtfm{#2} at\dgsize \scriptfont#1=\mF
  \let\dgsize=\sizemsscript \font\mF=\whichtfm{#2} at\dgsize \scriptscriptfont#1=\mF
  \let\dgsize=\undefined
}
\def\corrmsizes{\ptmunit=1\ptunit\relax}
\def\setmathsizes[#1/#2/#3]{%
   \def\sizemtext{#1\ptmunit}\def\sizemscript{#2\ptmunit}% 
   \def\sizemsscript{#3\ptmunit}%
}
\ifx\ptuint\undefined  \def\ptunit{pt}\fi
\ifx\ptmunit\undefined \csname newdimen\endcsname\ptmunit\fi \ptmunit=1\ptunit
\ifx\sizemtext\undefined \setmathsizes[10/7/5]\fi

\def\setmathdimens{% PlainTeX sets these dimens for 10pt size only:
  \delimitershortfall=0.5\fontdimen6\textfont3
  \nulldelimiterspace=0.12\fontdimen6\textfont3
  \scriptspace=0.05\fontdimen6\textfont3
  \skewchar\textfont1=127 \skewchar\scriptfont1=127
  \skewchar\scriptscriptfont1=127
  \skewchar\textfont2=48  \skewchar\scriptfont2=48 
  \skewchar\scriptscriptfont2=48 
}
% load the fonts:
\ifx\normalmathloading\relax\else \ifx\unimathfont\relax\else \normalmath \fi\fi 

\newcount\umathnumA  \newcount\umathnumB

\def\umathcorr#1#2{\expandafter#1\expandafter{\the#2}}
\def\umathprepare#1{\def\umathscanholes##1[#1]##2##3\relax{##2}}
\def\umathvalue#1{\expandafter\umathscanholes\umathcharholes[#1]{#1}\relax}

\def\umathcharholes{% holes in math alphabets:
   [119893]{"210E}[119965]{"212C}[119968]{"2130}[119969]{"2131}%
   [119971]{"210B}[119972]{"2110}[119975]{"2112}[119976]{"2133}[119981]{"211B}%
   [119994]{"212F}[119996]{"210A}[120004]{"2134}%
   [120070]{"212D}[120075]{"210C}[120076]{"2111}[120085]{"211C}[120093]{"2128}%
   [120122]{"2102}[120127]{"210D}[120133]{"2115}[120135]{"2119}
   [120136]{"211A}[120137]{"211D}[120145]{"2124}%
}
\def\umathrange#1#2{\umathnumB=#2\relax \umathrangeA#1}
\def\umathrangeA#1-#2{\umathnumA=`#1\relax
   \loop
      \umathcorr\umathprepare\umathnumB
      \Umathcode \umathnumA = 7 1 \umathcorr\umathvalue{\umathnumB}
      \ifnum\umathnumA<`#2\relax
         \advance\umathnumA by1 \advance\umathnumB by1
   \repeat
}
\def\umathrangeGREEK{\begingroup
   \lccode`A="0391 \lccode`Z="03A9
   \lowercase{\endgroup\umathrange{A-Z}}}
\def\umathrangegreek{\begingroup
   \lccode`A="03B1 \lccode`Z="03D6
   \lowercase{\endgroup\umathrange{A-Z}}}
\def\greekdef#1{\ifx#1\relax \else
   \begingroup \lccode`X=\umathnumB \lowercase{\endgroup \def#1{X}}%
   \advance\umathnumB by 1
   \expandafter\greekdef \fi
}
\umathnumB="0391
\greekdef \Alpha \Beta \Gamma \Delta \Epsilon \Zeta \Eta \Theta \Iota \Kappa
   \Lambda \Mu \Nu \Xi \Omicron \Pi \Rho \varTheta \Sigma \Tau \Upsilon \Phi
   \Chi \Psi \Omega \relax

\umathnumB="03B1
\greekdef \alpha \beta \gamma \delta \epsilon \zeta \eta \theta \iota \kappa
   \lambda \mu \nu \xi \omicron \pi \rho \varsigma \sigma \tau \upsilon
   \varphi \chi \psi \omega \varbeta \vartheta \phi \varpi \relax

\chardef\ncharrmA=`A       \chardef\ncharrma=`a
\chardef\ncharbfA="1D400   \chardef\ncharbfa="1D41A
\chardef\ncharitA="1D434   \chardef\ncharita="1D44E
\chardef\ncharbiA="1D468   \chardef\ncharbia="1D482
\chardef\ncharclA="1D49C   \chardef\ncharcla="1D4B6
\chardef\ncharbcA="1D4D0   \chardef\ncharbca="1D4EA
\chardef\ncharfrA="1D504   \chardef\ncharfra="1D51E
\chardef\ncharbrA="1D56C   \chardef\ncharbra="1D586
\chardef\ncharbbA="1D538   \chardef\ncharbba="1D552
\chardef\ncharsnA="1D5A0   \chardef\ncharsna="1D5BA
\chardef\ncharbsA="1D5D4   \chardef\ncharbsa="1D5EE
\chardef\ncharsiA="1D608   \chardef\ncharsia="1D622
\chardef\ncharsxA="1D63C   \chardef\ncharbsx="1D656
\chardef\ncharttA="1D670   \chardef\nchartta="1D68A

\protected\def\rmvariables     {\umathrange{A-Z}\ncharrmA \umathrange{a-z}\ncharrma}
\protected\def\bfvariables     {\umathrange{A-Z}\ncharbfA \umathrange{a-z}\ncharbfa}
\protected\def\nitvariables    {\umathrange{A-Z}\ncharitA \umathrange{a-z}\ncharita}
\protected\def\bivariables     {\umathrange{A-Z}\ncharbiA \umathrange{a-z}\ncharbia}
\protected\def\calvariables    {\umathrange{A-Z}\ncharclA \umathrange{a-z}\ncharcla}
\protected\def\bcalvariables   {\umathrange{A-Z}\ncharbcA \umathrange{a-z}\ncharbca}
\protected\def\frakvariables   {\umathrange{A-Z}\ncharfrA \umathrange{a-z}\ncharfra}
\protected\def\bfrakvariables  {\umathrange{A-Z}\ncharbrA \umathrange{a-z}\ncharbra}
\protected\def\bbvariables     {\umathrange{A-Z}\ncharbbA \umathrange{a-z}\ncharbba}
\protected\def\sansvariables   {\umathrange{A-Z}\ncharsnA \umathrange{a-z}\ncharsna}
\protected\def\bsansvariables  {\umathrange{A-Z}\ncharbsA \umathrange{a-z}\ncharbsa}
\protected\def\isansvariables  {\umathrange{A-Z}\ncharsiA \umathrange{a-z}\ncharsia}
\protected\def\bisansvariables {\umathrange{A-Z}\ncharsxA \umathrange{a-z}\ncharsxa}
\protected\def\ttvariables     {\umathrange{A-Z}\ncharttA \umathrange{a-z}\nchartta}

\chardef\greekrmA="0391   \chardef\greekrma="03B1
\chardef\greekbfA="1D6A8  \chardef\greekbfa="1D6C2
\chardef\greekitA="1D6E2  \chardef\greekita="1D6FC
\chardef\greekbiA="1D71C  \chardef\greekbia="1D736
\chardef\greeksnA="1D756  \chardef\greeksna="1D770
\chardef\greeksiA="1D790  \chardef\greeksia="1D7AA

\protected\def\nitgreek   {\umathrangeGREEK\greekrmA \umathrangegreek\greekita}
\protected\def\rmgreek    {\umathrangeGREEK\greekrmA \umathrangegreek\greekrma}
\protected\def\bfgreek    {\umathrangeGREEK\greekbfA \umathrangegreek\greekbfa}
\protected\def\bigreek    {\umathrangeGREEK\greekbfA \umathrangegreek\greekbia}
\protected\def\sansgreek  {\umathrangeGREEK\greeksnA \umathrangegreek\greeksna}
\protected\def\isansgreek {\umathrangeGREEK\greeksnA \umathrangegreek\greeksia}

% Another possibility (slanted capitals in \nitgreek, \bigreek, \isansgreek):
%\protected\def\nitgreek   {\umathrangeGREEK\greekitA \umathrangegreek\greekita}
%\protected\def\rmgreek    {\umathrangeGREEK\greekrmA \umathrangegreek\greekrma}
%\protected\def\bfgreek    {\umathrangeGREEK\greekbfA \umathrangegreek\greekbfa}
%\protected\def\bigreek    {\umathrangeGREEK\greekbiA \umathrangegreek\greekbia}
%\protected\def\sansgreek  {\umathrangeGREEK\greeksnA \umathrangegreek\greeksna}
%\protected\def\isansgreek {\umathrangeGREEK\greeksiA \umathrangegreek\greeksia}

\chardef\digitrmO=`0
\chardef\digitbfO="1D7CE
\chardef\digitbbO="1D7D8
\chardef\digitsnO="1D7E2
\chardef\digitbsO="1D7EC
\chardef\digitttO="1D7F6

\protected\def\rmdigits    {\umathrange{0-9}\digitrmO}
\protected\def\bfdigits    {\umathrange{0-9}\digitbfO}
\protected\def\bbdigits    {\umathrange{0-9}\digitbbO}
\protected\def\sansdigits  {\umathrange{0-9}\digitsnO}
\protected\def\bsansdigits {\umathrange{0-9}\digitbsO}
\protected\def\ttdigits    {\umathrange{0-9}\digitttO}

\protected\def\inmath#1{\relax \ifmmode#1\fi} % to keep off \loop processing in text mode

% You can redefine these macros to follow your wishes.
% For example you need upgright lowercase greek letters, you don't need
% \bf and \bi behaves as sans serif in math, ...

\def\rm {\tenrm \inmath{\rmvariables \rmdigits}}
\def\it {\tenit \inmath{\nitvariables}}
\def\bf {\tenbf \inmath{\bsansvariables \sansgreek \bsansdigits}}
\def\bi {\tenbi \inmath{\bisansvariables \isansgreek \bsansdigits}}
\def\tt {\tentt \inmath{\ttvariables \ttdigits}}
\def\bbchar  {\bbvariables \bbdigits}
\def\cal     {\calvariables}
\def\frak    {\frakvariables}
\def\misans  {\isansvariables \isansgreek \sansdigits}
\def\mbisans {\bisansvariables \isansgreek \bsansdigits}
\def\script  {\rmvariables \fam4 }

% Math codes: 

\begingroup  % \input MathClass.txt:
   \def\p#1;#2{\edef\tmp{\pB#2}\ifx\tmp\empty \else\pA#1....\end#2\fi}
   \def\pA#1..#2..#3\end#4{%
      \ifx\relax#2\relax \pset{"#1}{#4}\else
         \umathnumA="#1
         \loop
            \pset{\umathnumA}{#4}%
            \ifnum\umathnumA<"#2 \advance\umathnumA by1
         \repeat 
      \fi
   }
   \def\pB#1{\if#1L1\fi \if#1B2\fi \if#1V2\fi \if#1R3\fi \if#1N0\fi \if#1U0\fi
             \if#1F0\fi \if#1O4\fi \if#1C5\fi \if#1P6\fi \if#1A7\fi}
   \def\pset#1#2{\global\Umathcode#1=\tmp\space 1 #1\relax
      \if#2O\global\Udelcode#1=1 #1\relax\fi
      \if#2C\global\Udelcode#1=1 #1\relax\fi
      \if#2F\global\Udelcode#1=1 #1\relax\fi
   }
   \catcode`#=14
   \everypar={\setbox0=\lastbox \par \p}
   \input MathClass.txt
\endgroup

\begingroup  % \input unicode-math-table.tex:
   \def\UnicodeMathSymbol #1#2#3#4{%
      \global\Umathcharnumdef#2=\Umathcodenum#1\relax
      \ifx#3\mathopen   \gdef#2{\Udelimiter 4 1 #1 }\fi
      \ifx#3\mathclose  \gdef#2{\Udelimiter 5 1 #1 }\fi
      \ifx#3\mathaccent \gdef#2{\Umathaccent fixed 7 1 #1 }\fi
   }
   \input unicode-math-table
\endgroup

\nitgreek \nitvariables \rmdigits   % default setting

\Umathcode `- = 2 1 "2212
\let\{=\lbrace \let\}=\rbrace

\def\sqrt       {\Uradical 1 "0221A }
\def\cuberoot   {\Uradical 1 "0221B }
\def\fourthroot {\Uradical 1 "0221C }

\def\intwithnolimits#1{\ifx#1\relax \escapechar=`\\ \else \escapechar=-1
   \expandafter\let\csname\string#1op\endcsname=#1%
   \expandafter\def\expandafter#1\expandafter{\csname\string#1op\endcsname \nolimits}%
   \expandafter \intwithnolimits \fi
}
\intwithnolimits \int \iint \iiint \oint \oiint \oiiint \intclockwise
   \varointclockwise \ointctrclockwise \sumint \iiiint \intbar \intBar \fint
   \pointint \sqint \intlarhk \intx \intcap \intcup \upint \lowint \relax

\def\vert  {\Udelimiter 0 1 "07C }
\def\Vert  {\Udelimiter 0 1 "02016 }
\def\Vvert {\Udelimiter 0 1 "02980 }

\def\overbrace    #1{\mathop {\Umathaccent  7 1 "023DE{#1}}\limits}
\def\underbrace   #1{\mathop {\Umathaccent bottom 7 1 "023DF{#1}}\limits}
\def\overparen    #1{\mathop {\Umathaccent  7 1 "023DC{#1}}\limits}
\def\underparen   #1{\mathop {\Umathaccent bottom 7 1 "023DD{#1}}\limits}
\def\overbracket  #1{\mathop {\Umathaccent  7 1 "023B4{#1}}\limits}
\def\underbracket #1{\mathop {\Umathaccent bottom 7 1 "023B5{#1}}\limits}

\def\widehat            {\Umathaccent 7 1 "00302 }
\def\widetilde          {\Umathaccent 7 1 "00303 }
\def\overleftharpoon    {\Umathaccent 7 1 "020D0 }
\def\overrightharpoon   {\Umathaccent 7 1 "020D1 }
\def\overleftarrow      {\Umathaccent 7 1 "020D6 }
\def\overrightarrow     {\Umathaccent 7 1 "020D7 }
\def\overleftrightarrow {\Umathaccent 7 1 "020E1 }

\let\loadmathfonts=\relax  % we need no more 8bit math fonts

\endinput

--------------------------------------------

You can combine more fonts, if you register them to another
math families (5, 6, 7, etc.) in \normalmath macro.

The default value of \normalmath shows a combination of base Unicode Math
font with 8bit Math font at family 4. See definition of \script macro where
\fam4 is used. Of course, we need to set \rmvariables too, because 8bit font
accepts only codes less than 255.

See http://tex.stackexchange.com/questions/308749/ for more technical details.

The poor bold is used for complete bold vaiant of the font. If the selected
font has its bold vaiant (like xits-math), you can re-define \boldmath macro
by:

\def\boldmath{%
   \loadumathfamily 1 {[xits-mathbold]}{} % Base font
   \loadmathfamily  4 rsfs                % script
   \setmathdimens
}
