listofsymb.tex

\makeatletter
\usepackage{auxhook}
\AddLineBeginAux{%
  \string\providecommand\string\new@aux@symb[3]{}%
}
\newcommand*{\symb@list}{}
\newlength{\symb@maxwidth}
\newlength{\symb@meaning}
\newcommand*{\new@aux@symb}[3]{%
  \g@addto@macro{\symb@list}{\symb@do{#1}{#2}{#3}}%
  \@newl@bel{SYMB}{#1}{#2}%
  \begingroup
    \settowidth{\dimen@}{#2}%
    \ifdim\dimen@>\symb@maxwidth
      \global\symb@maxwidth=\dimen@
    \fi
  \endgroup
}
\newcommand*{\new@symb}[3]{%
  \@bsphack
  \if@filesw
    \protected@write\@auxout{}{%
      \string\new@aux@symb{#1}{%
        \detokenize\expandafter{\unexpanded{#2}}%
      }{%
        \detokenize\expandafter{\unexpanded{#3}}%
      }%
    }%
  \fi
  \label{symb:#1}%
%  \@ifundefined{SYMB@#1}{%
%    \expandafter\gdef\csname SYMB@#1\endcsname{#2}%
%  }{}%
  \@esphack
}
\newcommand*{\newmathsymb}[3]{%
  \new@symb{#1}{\ensuremath{#2}}{#3}%
}
\newcommand*{\newtextsymb}{%
  \@dblarg\symb@newtext
}
\def\symb@newtext[#1]#2#3{%
  \new@symb{#1}{#2}{#3}%
}
\newcommand*{\symb}[1]{%
  \@ifundefined{SYMB@#1}{%
    \@latex@warning{Symbol `#1' is undefined}%
    \nfss@text{\textbf{??}}%
  }{%
    \csname SYMB@#1\endcsname
  }%
}
% List of symbols
\newcommand*{\symb@head}[1]{\textbf{\large#1}}
\newcommand*{\printsymblist}{%
  \twocolumn[%
    \section*{%
      \centering
      Lista dei simboli e abbreviazioni %
    }%
  ]%
  \thispagestyle{empty}% optional
  \renewcommand*{\arraystretch}{1.1}%
  \settowidth{\dimen@}{\symb@head{Symbol}}%
  \ifdim\dimen@>\symb@maxwidth
    \global\symb@maxwidth\dimen@
  \fi
  \setlength{\symb@meaning}{\linewidth}%
  \addtolength{\symb@meaning}{-\symb@maxwidth}%
  \settowidth{\dimen@}{\symb@head{Page}}%
  \addtolength{\symb@meaning}{-\dimen@}%
  \addtolength{\symb@meaning}{-4\tabcolsep}%
  \tablehead{%
    \symb@head{Simbolo} & \symb@head{Significato} & \symb@head{Pag.}\\[.5ex]%
  }%
  \begin{supertabular}{@{}p{\symb@maxwidth}p{\symb@meaning}c@{}}%
    \symb@list
  \end{supertabular}%
  \clearpage
  \onecolumn
}
\newcommand*{\symb@do}[3]{%
  #2&%
  \sbox0{%
    \renewcommand*{\arraystretch}{1}%
    \begin{tabular}[t]{@{}p{\symb@meaning}@{}}%
      \raggedright
      #3%
    \end{tabular}%
  }%
  \sbox2{%
    \renewcommand*{\arraystretch}{1}%
    \begin{tabular}[b]{@{}b{\symb@meaning}@{}}%
      \raggedright
      #3%
    \end{tabular}%
  }%
  \usebox0 %
  \xdef\symb@raise{\the\dimexpr\ht0-\ht2}%
  &\raisebox{\symb@raise}{\pageref{symb:#1}}\tabularnewline
}
\makeatother


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