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%
% T A B L S . S T Y (ver 3.5)
%
% Copyright (c) 1989-1996 by Donald Arseneau
%
% These macros may be freely used, transmitted, reproduced, or modified
% provided that this notice is left intact.
%
% Modify LaTeX's array and tabular environments to keep text from touching
% other text or hlines above or below. See instructions after \endinput.
%
%----------------------------------------------------------------------
% create registers and default settings:
\newdimen\tablinesep \tablinesep= 1pt \let\tablineskip=\tablinesep
\newdimen\arraylinesep \arraylinesep= 1pt \let\arraylineskip=\arraylinesep
\newdimen\extrarulesep \extrarulesep= 3pt
\newdimen\@arstdepth \newdimen\@arstheight \newdimen\@skip@bove
\let\@tarlinesep\z@ % so outermost arrays will not act nested
% Change the initializations to create a smaller strut and include
% my macros in the initialization for the preamble.
\def\@array[#1]#2{% remember global variables to allow recursion:
\edef\@unrecurse{\global\@skip@bove\the\@skip@bove
\global\@arstheight\the\@arstheight\global\@arstdepth\the\@arstdepth}%
% Make the strut on the first line be shorter by the linesep outside
\let\@otarlinesep\@tarlinesep \global\@skip@bove-\@otarlinesep
% This setup works for both tabular and array because of this test:
\ifx\@classz\@arrayclassz \let\@tarlinesep\arraylinesep
\else \let\@tarlinesep\tablinesep \fi
\divide\@tarlinesep\tw@ % half sep is applied to height & depth
\let\@seesize\relax \let\@rememsize\relax \@mkpream{#2}%
\@tempdima\arraystretch\ht\strutbox \@tempdimb\arraystretch\dp\strutbox
\ifdim\@tarlinesep>\z@ % (need \protect for \multicolumn)
\def\@rememsize{\protect\@r@m@msize}\let\@seesize\@s@@size
\advance\@tempdima-\@tarlinesep \advance\@tempdimb-\@tarlinesep
\fi \setbox\@arstrutbox\hbox{% set up smaller strut
\vrule \@height\@tempdima \@depth\@tempdimb \@width\z@}%
\let\protect\noexpand
\edef\@preamble{\ialign \noexpand\@halignto \bgroup
\unhcopy\@arstrutbox \@preamble \tabskip\z@skip &\@sharp \cr}%
% I have added an extra column (&\@sharp) to take the smart strut.
\let\@startpbox\@@startpbox \let\@endpbox\@@endpbox
\if#1t\vtop \else \if#1b\vbox \else \vcenter \fi\fi
\bgroup \let\par\@empty
\global\@arstheight\ht\@arstrutbox \global\@arstdepth\dp\@arstrutbox
\advance\extrarulesep.5\arrayrulewidth
\let\@sharp##\let\protect\relax \lineskip\z@skip \baselineskip\z@skip
\@preamble}
% Change the meaning of \\ to do the final strut calculation and
% put in the smart strut
\def\@xtabularcr{\@ifnextchar[{\@argtabularcr}{\@argtabularcr[\z@]}}
\def\@xarraycr{\aftergroup\@argarraycr\@xtabularcr}
\def\@argarraycr{${}}% put this "aftergroup" so we can combine macro streams
% Sense a following \end, and adjust spacing accordingly;
% Sense a rule below, as signalled by "\noalign" after expansion
\def\@argtabularcr[#1]{\ifnum\z@=`{\fi}&\omit % end group, new column
{\ifnum\z@=`}\fi
\global\advance\@arstheight\@skip@bove % use \@skip@bove so it is available
\global\@skip@bove#1\relax % actually, the skip below
\@ifnextchar\end{\global\advance\@arstdepth-\@otarlinesep\@mystrutcr}%
{\expandafter\expandafter\expandafter\@xargarraycr}}
\def\@xargarraycr{\@ifnextchar\noalign
{\global\advance\@arstdepth\extrarulesep \@mystrutcr}%
{\@mystrutcr}}
\def\@mystrutcr{% \@skip@bove is really the parameter for skip below here
\ifdim\@skip@bove>\z@ \advance\@arstdepth\@skip@bove \global\@skip@bove\z@\fi
\advance\@arstheight\@tarlinesep \advance\@arstdepth\@tarlinesep
\vrule \@height\@arstheight \@depth\@arstdepth \@width\z@
\global\@arstheight\ht\@arstrutbox \global\@arstdepth\dp\@arstrutbox
\ifnum\z@=`{\fi}\cr
\ifdim\@skip@bove<\z@ \noalign{\vskip\@skip@bove \global\@skip@bove\z@}\fi}
% Simulate \crcr at the end of the table, assuming that we are not in
% vmode once a line of entries has started. This fails to put in a smart
% strut if the table ends without \\ while in vmode in a column entry.
% Use \@unrecurse to simulate grouping of global parameters.
% For nested tables and arrays, the final strut is reduced by the linesep
% that will be added at the outer level.
\def\endtabular{\endarray $\egroup}
\expandafter\let\csname endtabular*\endcsname=\endtabular
\def\endarray{\ifvmode\csname crcr\endcsname % just do \crcr if \\ given
\else \\[\z@ \global\advance\@arstdepth-\@otarlinesep]%
\fi\egroup\@unrecurse\egroup}
% Put \@seesize...\@rememsize in all preamble templates
\def\@tabclassz{\ifcase \@lastchclass \@acolampacol \or \@ampacol \or
\or \or \@addamp \or
\@acolampacol \or \@firstampfalse \@acol \fi
\edef\@preamble{\@preamble{%
\ifcase
\@chnum \hfil\@seesize\ignorespaces\@sharp\unskip\@rememsize \hfil
\or \@seesize\ignorespaces\@sharp\unskip\@rememsize \hfil
\or \hfil\hskip\z@skip\@seesize\ignorespaces\@sharp\unskip\@rememsize
\fi}}}
\def\@arrayclassz{\ifcase \@lastchclass \@acolampacol \or \@ampacol \or
\or \or \@addamp \or
\@acolampacol \or \@firstampfalse \@acol \fi
\edef\@preamble{\@preamble
\ifcase \@chnum
\hfil\@seesize $\relax\@sharp$\@rememsize \hfil
\or \@seesize $\relax\@sharp$\@rememsize \hfil
\or \hfil\@seesize $\relax\@sharp$\@rememsize \fi}}
\def\@classv{\@addtopreamble{\@seesize\@startpbox{\@nextchar}%
\ignorespaces\@sharp\@endpbox\@rememsize}}
% my macros to keep track of the size of entries.
\def\@s@@size{\setbox\z@\hbox\bgroup\bgroup}
\def\@r@m@msize{\egroup\egroup % end the \hbox
\ifdim\ht\z@>\@arstheight \global\@arstheight\ht\z@ \fi
\ifdim\dp\z@>\@arstdepth \global\@arstdepth \dp\z@ \fi
\unhbox\z@}
% Redefine \hline to remove notches and to give extrarulesep and
% optional [] skip
\def\hline{\noalign{\ifnum\z@=`}\fi\kern-.5\arrayrulewidth
\hrule \@height \arrayrulewidth \kern-.5\arrayrulewidth
\global\@skip@bove\extrarulesep
\@ifnextchar[\@yhline{\expandafter\expandafter\expandafter\@zhline}}
\def\@xhline{\ifx\@tempa\noalign \vskip\doublerulesep \fi % may be the opt.
\ifnum`{=\z@\fi}}
\def\@yhline[#1]{\doublerulesep#1\global\advance\@skip@bove#1\relax
\expandafter\expandafter\expandafter\@zhline}
\def\@zhline{\futurelet\@tempa\@xhline}%
% make \cline give the \extrarulesep below
\let\TB@cline\cline
\def\cline#1{\noalign{\kern-.5\arrayrulewidth}%
\TB@cline{#1}%
\noalign{\global\@skip@bove\extrarulesep \kern.5\arrayrulewidth}}%
\endinput
% -----------------------------------------------------------------
%
% Modify LaTeX's array and tabular environments to keep text from touching
% other text or hlines above or below. There are three new parameters:
%
% \tablinesep (or \tablelineskip): minimum space between text on successive
% lines in a tabular environment. Negative distances are
% treated as zero. The default value is 1pt. 0pt turns off
% checking for touching text. Text given in an @{ }
% specification is never checked for overlap.
%
% \arraylinesep (or \arraylineskip): like \tablinesep, but for arrays.
%
% \extrarulesep : extra space to add above and below each \hline and \cline.
% There will be at least \extrarulesep + 0.5\tablinesep
% between an \hline and a line of text. Negative values can
% be used, but only until some text touches the line.
% The default value is 3pt.
%
% To ensure interline separations in tables but not arrays, declare
% \setlength\arraylinesep{0pt}
% The appearance of normal LaTeX tables can be had with
% \setlength\tablinesep{0pt}
% \setlength\arraylinesep{0pt}
% \setlength\extrarulesep{0pt}
% but it would be better to not use tabls in this situation.
%
% \hline[dimen]:
%
% \hline has been changed to take an optional length argument just like \\
% giving the space to insert below. This space is in addition to the
% \extrarulesep and linesep. A negative value will reduce the space until
% the hline touches some text below, and then will have no further effect.
% E.g., \hline[-9in] draws a horizontal line while suppressing the extrarulesep
% beneath. Also, the new \hline FIXES THE NOTCHES that used to appear at the
% junction between horizontal and vertical lines.
%
% How it works:
% There are no struts in the preamble entries (lie), rather, there are
% tests to measure the maximum height and depth of all entries on a line.
% The maximum values start at the size of LaTeX's \@arstrut minus the
% appropriate linesep. At the \\, a strut is inserted (in its own
% column) which is that maximum size plus the linesep plus any additional
% space for separation from \hline s.
%
% The Downside:
% Building a table will be slower than before because the entries have to
% be boxed twice (by \@seesize and by \halign itself) instead of just once.
% \setlength\tablinesep{0pt} will recover most of this speed, with
% \extrarulesep still partially in effect--extra space will still be added
% around hlines, but it may be taken up by very tall or very deep table
% entries; thus text may still touch the lines. Because of the speed penalty,
% if your computer is slow, it is probably best to omit the TABLS option
% until producing a final copy.
%
% (2.2) \endtabular* is defined (it was left out before. oops!)
% change some \z@ to \z@skip. Thanks to Michael Downes.
% Create alias \tablinesep = \tablelineskip for consistency with
% \tabcolsep nomenclature. \def\\{\crcr} used in ver 2.1 didn't work right,
% so use \csname crcr\endcsname.
%
% (3.0) Arrays are included! The very top and bottom struts of nested
% arrays are reduced by the lesser of the inner and outer lineseps so space
% doesn't accumulate with each level of nesting.
%
% (3.1 & 3.2 & 3.3) Minor changes to match LaTeX updates.
%
% (3.4) More extensive changes, prompted by LaTeX updates. You can now hide
% \hline in another macro, and it is still recognized. [Similar commands that
% add \extrarulesep must begin with \noalign.] \hline[3pt]\hline is now
% reasonable. (Also try \hline[0pt]\hline!)
%
% (3.5) Fix several (non-crashing) bugs introduced in 3.4
%
% Send problem reports to asnd@triumf.ca
%
% Test integrity of file:
% brackets: round, square, curly, angle: () [] {} <>
% backslash, slash, vertical, at, dollar, and: \ / | @ $ &
% hat, grave, acute (apostrophe), quote, tilde: ^ ` ' " ~
|
