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Filename : lualatex-math.sty
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%%
%% This is file `lualatex-math.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% lualatex-math.dtx  (with options: `package')
%% 
%% This is a generated file.
%% 
%% Copyright 2011, 2012 Philipp Stephani
%% 
%% This file 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 2009/09/24 or later.
%% 
\NeedsTeXFormat{LaTeX2e}[2009/09/24]
\RequirePackage{expl3}[2012/08/14]
\ProvidesExplPackage{lualatex-math}{2013/01/13}{1.2}%
  {Patches for mathematics typesetting with LuaLaTeX}
\RequirePackage { etoolbox } [ 2007/10/08 ]
\RequirePackage { luatexbase } [ 2010/05/27 ]
\RequirePackage { filehook } [ 2011/03/09 ]
\RequireLuaModule { lualatex-math } [ 2011/05/05 ]
\cs_new_nopar:Npn \__lltxmath_restore_catcode:N #1 {
  \char_set_catcode:nn { \int_eval:n { `#1 } }
    { \char_value_catcode:n { `#1 } }
}
\exp_args:Nx \AtEndOfPackage {
  \__lltxmath_restore_catcode:N \$
}
\char_set_catcode_math_toggle:N \$
\msg_new:nnn { lualatex-math } { luatex-required } {
  The~ lualatex-math~ package~ requires~ LuaTeX. \\
  I~ will~ stop~ loading~ now.
}
\msg_new:nnnn { lualatex-math } { different-meanings } {
  I've~ expected~ the~ control~ sequences \\
  #1~ and~ #3 \\
  to~ have~ the~ same~ meaning,~ but~ their~ meanings~ are~ different.
} {
  The~ meaning~ of~ #1~ is: \\
  #2 \\
  The~ meaning~ of~ #3~ is: \\
  #4
}
\msg_new:nnn { lualatex-math } { macro-expected } {
  I've~ expected~ that~ #1~ is~ a~ macro,~ but~ it~ isn't.
}
\msg_new:nnn { lualatex-math } { wrong-meaning } {
  I've~ expected~ #1~ to~ have~ the~ meaning \\
  #3, \\
  but~ it~ has~ the~ meaning \\
  #2.
}
\msg_new:nnn { lualatex-math } { patch-macro } {
  I'm~ going~ to~ patch~ macro~ #1.
}
\luatex_if_engine:F {
  \msg_error:nn { lualatex-math } { luatex-required }
  \endinput
}
\cs_new_eq:NN \__lltxmath_temp:w \prg_do_nothing:
\luatexbase@ensure@primitive { Umathcode }
\luatexbase@ensure@primitive { Umathcodenum }
\luatexbase@ensure@primitive { Umathchardef }
\cs_new_protected_nopar:Npn \__lltxmath_assert_eq:NN #1 #2 {
  \cs_if_eq:NNF #1 #2 {
    \msg_error:nnxxxx { lualatex-math } { different-meanings }
      { \token_to_str:N #1 } { \token_to_meaning:N #1 }
      { \token_to_str:N #2 } { \token_to_meaning:N #2 }
  }
}
\cs_new_protected_nopar:Npn \__lltxmath_patch:NNnnn #1 #2 #3 #4 #5 {
  \cs_if_exist:NT #1 {
    \token_if_macro:NTF #1 {
      \group_begin:
      #2 \__lltxmath_temp:w #3 { #4 }
      \cs_if_eq:NNTF #1 \__lltxmath_temp:w {
        \msg_info:nnx { lualatex-math } { patch-macro }
          { \token_to_str:N #1 }
        \group_end:
        #2 #1 #3 { #5 }
      } {
        \msg_warning:nnxxx { lualatex-math } { wrong-meaning }
          { \token_to_str:N #1 } { \token_to_meaning:N #1 }
          { \token_to_meaning:N \__lltxmath_temp:w }
        \group_end:
      }
    } {
      \msg_warning:nnx { lualatex-math } { macro-expected }
        { \token_to_str:N #1 }
    }
  }
}
\cs_generate_variant:Nn \__lltxmath_patch:NNnnn { c }
\cs_new_protected_nopar:Npn \__lltxmath_set_mathchar:NN #1 #2 {
  \luatexUmathchardef #1
  \lua_now_x:n {
    lualatex.math.print_class_fam_slot( \int_eval:n { `#2 } )
  }
  \scan_stop:
}
\__lltxmath_assert_eq:NN \newfam \new@mathgroup
\__lltxmath_patch:NNnnn \new@mathgroup \cs_set_nopar:Npn { } {
  \alloc@ 8 \mathgroup \chardef \sixt@@n
} {
  \alloc@ 8 \mathgroup \chardef \c_two_hundred_fifty_six
}
\cs_set_eq:NN \newfam \new@mathgroup
\luatexbase@ensure@primitive { Ustack }
\AtEndPreamble {
  \@ifpackageloaded { amsmath } { } {
    \__lltxmath_patch:NNnnn \frac \cs_set_nopar:Npn { #1 #2 } {
      {
        \begingroup #1 \endgroup \over #2
      }
    } {
      {
        \luatexUstack { \group_begin: #1 \group_end: \over #2 }
      }
    }
  }
}
\luatexbase@ensure@primitive { alignmark }
\luatexbase@ensure@primitive { Ustartmath }
\luatexbase@ensure@primitive { Ustopmath }
\luatexbase@ensure@primitive { Umathstacknumup }
\luatexbase@ensure@primitive { Umathstackdenomdown }
\luatexbase@ensure@primitive { Umathstackvgap }
\int_const:Nn \c__lltxmath_std_minus_mathcode_int { "2200 }
\int_const:Nn \c__lltxmath_std_equal_mathcode_int { "303D }
\cs_new_nopar:Npn \__lltxmath_char_dim:NN #1 #2 {
  #1 \textfont
  \lua_now_x:n {
    lualatex.math.print_fam_slot( \int_eval:n { `#2 } )
  }
}
\tl_new:N \l__lltxmath_minus_mathchar
\tl_new:N \l__lltxmath_equal_mathchar
\AtBeginOfPackageFile { amsmath } {
  \__lltxmath_set_mathchar:NN \l__lltxmath_minus_mathchar \-
  \__lltxmath_set_mathchar:NN \l__lltxmath_equal_mathchar \=
  \char_set_mathcode:nn { `\- } { \c__lltxmath_std_minus_mathcode_int }
  \char_set_mathcode:nn { `\= } { \c__lltxmath_std_equal_mathcode_int }
  \AtEndOfPackageFile { amsmath } {
    \cs_set_eq:NN \std@minus \l__lltxmath_minus_mathchar
    \cs_set_eq:NN \std@equal \l__lltxmath_equal_mathchar
    \luatexUmathcodenum `\- \l__lltxmath_minus_mathchar
    \luatexUmathcodenum `\= \l__lltxmath_equal_mathchar
  }
}
\AtEndOfPackageFile * { amsmath } {
  \tl_replace_once:Nnn \@begindocumenthook {
    \mathchardef \std@minus \mathcode `\- \relax
    \mathchardef \std@equal \mathcode `\= \relax
  } {
    \__lltxmath_set_mathchar:NN \std@minus \-
    \__lltxmath_set_mathchar:NN \std@equal \=
  }
  \__lltxmath_patch:NNnnn \resetMathstrut@ \cs_set_nopar:Npn { } {
    \setbox \z@ \hbox {
      \mathchardef \@tempa \mathcode `\( \relax % \)
      \def \@tempb ##1 "##2 ##3 { \the \textfont "##3 \char" }
      \expandafter \@tempb \meaning \@tempa \relax
    }
    \ht \Mathstrutbox@ \ht \z@
    \dp \Mathstrutbox@ \dp \z@
  } {
    \box_set_ht:Nn \Mathstrutbox@ {
      \__lltxmath_char_dim:NN \fontcharht \( % \)
    }
    \box_set_dp:Nn \Mathstrutbox@ {
      \__lltxmath_char_dim:NN \fontchardp \)
    }
  }
  \__lltxmath_patch:NNnnn \subarray \cs_set:Npn { #1 } {
    \vcenter
    \bgroup
    \Let@
    \restore@math@cr
    \default@tag
    \baselineskip \fontdimen 10~ \scriptfont \tw@
    \advance \baselineskip \fontdimen 12~ \scriptfont \tw@
    \lineskip \thr@@ \fontdimen 8~ \scriptfont \thr@@
    \lineskiplimit \lineskip
    \ialign
    \bgroup
    \ifx c #1 \hfil \fi
    $ \m@th \scriptstyle ## $
    \hfil
    \crcr
  } {
    \vcenter
    \c_group_begin_token
    \Let@
    \restore@math@cr
    \default@tag
    \skip_set:Nn \baselineskip {
      \luatexUmathstacknumup \scriptstyle
      + \luatexUmathstackdenomdown \scriptstyle
    }
    \lineskip \luatexUmathstackvgap \scriptstyle
    \lineskiplimit \lineskip
    \ialign
    \c_group_begin_token
    \token_if_eq_meaning:NNT c #1 { \hfil }
    \luatexUstartmath
    \m@th
    \scriptstyle
    \luatexalignmark \luatexalignmark
    \luatexUstopmath
    \hfil
    \crcr
  }
  \__lltxmath_patch:cNnnn { frac~ } \cs_set:Npn { #1 #2 } {
    {
      \begingroup #1 \endgroup \@@over #2
    }
  } {
    {
      \luatexUstack { \group_begin: #1 \group_end: \@@over #2 }
    }
  }
  \__lltxmath_patch:NNnnn \@genfrac \cs_set_nopar:Npn {
    #1 #2 #3 #4 #5
  } {
    {
      #1 { \begingroup #4 \endgroup #2 #3 \relax #5 }
    }
  } {
    {
      #1 {
        \luatexUstack {
          \group_begin: #4 \group_end: #2 #3 \scan_stop: #5
        }
      }
    }
  }
}
\group_begin:
\char_set_catcode_other:N \"
\AtEndOfPackageFile * { amsopn } {
  \__lltxmath_patch:NNnnn \newmcodes@ \cs_gset_nopar:Npn { } {
    \mathcode `\' 39
    \mathcode `\* 42
    \mathcode `\. "613A
    \ifnum \mathcode `\- = 45 ~ \else
      \mathchardef \std@minus \mathcode `\- \relax
    \fi
    \mathcode `\- 45
    \mathcode `\/ 47
    \mathcode `\: "603A \relax
  } {
    \char_set_mathcode:nn { `\' } { 39 }
    \char_set_mathcode:nn { `\* } { 42 }
    \char_set_mathcode:nn { `\. } { "613A }
    \int_compare:nNnF { \luatexUmathcodenum `\- } = { 45 } {
      \__lltxmath_set_mathchar:NN \std@minus \-
    }
    \char_set_mathcode:nn { `\- } { 45 }
    \char_set_mathcode:nn { `\/ } { 47 }
    \char_set_mathcode:nn { `\: } { "603A }
  }
}
\group_end:
\luatexbase@ensure@primitive { crampeddisplaystyle }
\luatexbase@ensure@primitive { crampedtextstyle }
\luatexbase@ensure@primitive { crampedscriptstyle }
\luatexbase@ensure@primitive { crampedscriptscriptstyle }
\AtEndOfPackageFile * { mathtools } {
  \__lltxmath_patch:NNnnn \MT_cramped_internal:Nn
    \cs_set_nopar:Npn { #1 #2 } {
    \sbox \z@ {
      $
      \m@th
      #1
      \nulldelimiterspace = \z@
      \radical \z@ { #2 }
      $
    }
    \ifx #1 \displaystyle
      \dimen@ = \fontdimen 8 \textfont 3
      \advance \dimen@ .25 \fontdimen 5 \textfont 2
    \else
      \dimen@ = 1.25 \fontdimen 8
      \ifx #1 \textstyle
        \textfont
      \else
        \ifx #1 \scriptstyle
          \scriptfont
        \else
          \scriptscriptfont
        \fi
      \fi
      3
    \fi
    \advance \dimen@ -\ht\z@
    \ht\z@ = -\dimen@
    \box\z@
  } {
    {
      \use:c { luatexcramped \cs_to_str:N #1 } #2
    }
  }
}
\AtEndOfPackageFile * { icomma } {
  \tl_replace_once:Nnn \@begindocumenthook {
    \mathchardef \mathcomma \mathcode `\,
  } {
    \__lltxmath_set_mathchar:NN \mathcomma \,
  }
}
\endinput
%%
%% End of file `lualatex-math.sty'.