Dtyjlui

I noticed that the bar and overbar as defined in unicode-math do not yield a centered bar over the letters.

For example for

documentclass{article}



usepackage{amsmath,unicode-math}

unimathsetup{math-style=ISO,bold-style=ISO,sans-style=italic}

setmathfont{texgyrepagella-math.otf}

%setmathfont[range={scr,bfscr}]{texgyredejavu-math.otf}



begin{document}

    begin{align}

    bar{mscrw} overbar{mscrw}

    end{align}

end{document}

I get:

Is there anything I can do about it?

P.S.: I am using texlive 2018 with lualatex.

It seems like a font bug.

If you use bar{{}mscrw} the output is as expected.

documentclass{article}



usepackage{amsmath,unicode-math}



unimathsetup{math-style=ISO,bold-style=ISO,sans-style=italic}



setmathfont{texgyrepagella-math.otf}



begin{document}



begin{gather}

bar{mathscr{a}} overbar{mathscr{a}} wideoverbar{mathscr{a}} \

bar{mathscr{b}} overbar{mathscr{b}} wideoverbar{mathscr{b}} \

bar{mathscr{d}} overbar{mathscr{d}} wideoverbar{mathscr{d}} \

bar{mathscr{g}} overbar{mathscr{g}} wideoverbar{mathscr{g}} \

bar{mathscr{u}} overbar{mathscr{u}} wideoverbar{mathscr{u}} \

bar{mathscr{w}} overbar{mathscr{w}} wideoverbar{mathscr{w}} \

bar{{}mscrw} overbar{{}mscrw} wideoverbar{{}mscrw}

end{gather}



end{document}

It's possible to fix bar (and other accents in the same way):

documentclass{article}



usepackage{amsmath,unicode-math}



unimathsetup{math-style=ISO,bold-style=ISO,sans-style=italic}



setmathfont{texgyrepagella-math.otf}



ExplSyntaxOn

cs_set_protected:Nn bonanza_bar_new:n

 {

  str_case:nnTF { #1 } 

   {

    {mathscr{w}}{}

    {mscrw}{}

   }

   { bonanza_bar_original:n { {}#1 } }

   { bonanza_bar_original:n { #1 } }

 }

AtBeginDocument

 {

  cs_set_eq:NN bonanza_bar_original:n bar

  cs_set_eq:NN bar bonanza_bar_new:n

 }

ExplSyntaxOff



begin{document}



[

bar{mathscr{a}}+

bar{mathscr{b}}+

bar{mathscr{d}}+

bar{mathscr{g}}+

bar{mathscr{u}}+

bar{mathscr{w}}+

bar{mscrw}

]



end{document}

with overline{mscrw} instead of bar

Using widebar from the macro (slightly amended) at this page Can I get a widebar without using the mathabx package?

documentclass{article}

usepackage{amsmath,unicode-math}

unimathsetup{math-style=ISO,bold-style=ISO,sans-style=italic}

setmathfont{texgyrepagella-math.otf}

%setmathfont[range={scr,bfscr}]{texgyredejavu-math.otf}



makeatletter

newcommand*rel@kern[1]{kern#1dimexprmacc@kerna}

newcommand*widebar[1]{%

  begingroup

  defmathaccent##1##2{%

    rel@kern{0.8}%

    overline{rel@kern{-0.8}macc@nucleusrel@kern{-0.1}}%

    rel@kern{-0.3}%

  }%

  macc@depth@ne

  letmath@bgroup@empty letmath@egroupmacc@set@skewchar

  mathsurroundz@ frozen@everymath{mathgroupmacc@grouprelax}%

  macc@set@skewcharrelax

  letmathaccentVmacc@nested@a

  macc@nested@arelax111{#1}%

  endgroup

}

makeatother

begin{document}

$widebar{mscrw}$

end{document}