EVOLUTION-MANAGER

Edit File: chemarr.sty

%%
%% This is file `chemarr.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% chemarr.dtx  (with options: `package')
%% 
%% This is a generated file.
%% 
%% Project: chemarr
%% Version: 2006/02/20 v1.2
%% 
%% Copyright (C) 2001, 2006 by
%%    Heiko Oberdiek <heiko.oberdiek at googlemail.com>
%% 
%% This work 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. This version of this license is in
%%    http://www.latex-project.org/lppl/lppl-1-3c.txt
%% and the latest version of this license is in
%%    http://www.latex-project.org/lppl.txt
%% and version 1.3 or later is part of all distributions of
%% LaTeX version 2005/12/01 or later.
%% 
%% This work has the LPPL maintenance status "maintained".
%% 
%% This Current Maintainer of this work is Heiko Oberdiek.
%% 
%% This work consists of the main source file chemarr.dtx
%% and the derived files
%%    chemarr.sty, chemarr.pdf, chemarr.ins, chemarr.drv,
%%    chemarr-example.tex.
%% 
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{chemarr}%
  [2006/02/20 v1.2 Arrows for chemical reactions (HO)]
\RequirePackage{amsmath}
\newcommand{\xrightleftharpoons}[2][]{%
  \ensuremath{%
    \mathrel{%
      \settoheight{\dimen@}{\raise 2pt\hbox{$\rightharpoonup$}}%
      \setlength{\dimen@}{-\dimen@}%
      \edef\CA@temp{\the\dimen@}%
      \settoheight\dimen@{$\rightleftharpoons$}%
      \addtolength{\dimen@}{\CA@temp}%
      \raisebox{\dimen@}{%
        \rlap{%
          \raisebox{2pt}{%
            $%
            \ext@arrow 0359\rightharpoonupfill@{\hphantom{#1}}{#2}%
            $%
          }%
        }%
        \hbox{%
          $%
          \ext@arrow 3095\leftharpoondownfill@{#1}{\hphantom{#2}}%
          $%
        }%
      }%
    }%
  }%
}
\newcommand*{\leftharpoondownfill@}{%
  \arrowfill@\leftharpoondown\relbar\relbar
}
\newcommand*{\rightharpoonupfill@}{%
  \arrowfill@\relbar\relbar\rightharpoonup
}
\endinput
%%
%% End of file `chemarr.sty'.