bigstrut.sty

%
%% bigstrut.sty  V1.0 (31-May-94)
%%
%% Author:  Jerry Leichter <jerrold.leichter@smarts.com>
%%
%% V1.0 Split out as a separate style file.
%%
%% This file may be distributed under the terms of the LaTeX Project Public
%% License, as described in lppl.txt in the base LaTeX distribution.
%% Either version 1 or, at your option, any later version.
%%
% \bigstrut[x] produces a strut which is \bigstrutjot (2pt by default) higher,
% lower, or both than the standard array/table strut.  Use it in table entries
% that are adjacent to \hline's to leave an extra bit of space - according to
% the TeXbook (page 246), "This is a little touch that improves the appearance
% of boxed tables; look for it as a mark of quality."
%
% Although you could use \bigstrut in an array, there isn't normally much
% point since arrays are "opened up" by \jot anyway.
%
% \bigstrut[t] adds height; \bigstrut[b] adds depth.  Just \bigstrut adds
% both.  So:  Use \bigstrut[t] in the row just *after* an \hline; \bigstrut[b]
% in the row just *before*; and \bigstrut if there are \hline's both before
% and after.
%
% Spaces after the \bigstrut are ignored, even if it has an optional argument.
% Spaces before the \bigstrut are generally ignored (by a single \unskip).
%
% Note:  The multirow style file makes use of \bigstrutjot.  If both styles
% are used, they can be used in either order, as each checks to see if the
% other has already defined \bigstrutjot.  However, the default values they
% set are different:  If only multirow is used, \bigstrutjot will be set to
% 3pt.  If bigstrut is used, with or without multirow, \bigstrutjot will be
% 2pt.

\@ifundefined{bigstrutjot}{\newdimen\bigstrutjot}{}\bigstrutjot2pt
\def\bigstrut{\relax\@ifnextchar [{\@bigstrut}{\@bigstrut[x]}}
\def\@bigstrut[#1]{\unskip\@tempdima\ht\@arstrutbox \@tempdimb\dp\@arstrutbox
  \ifx #1b\else \advance\@tempdima by \bigstrutjot\fi
    \ifx #1t\else \advance\@tempdimb by \bigstrutjot\fi
      \hbox{\vrule \@height\@tempdima \@depth\@tempdimb \@width\z@}\ignorespaces}