path: root/macros/latex/contrib/lineno/edtable.sty

%% `edtable.sty'---Uwe L"uck, direction Christian Tapp. 
%% LaTeX package for tables with line numbers and 
%% editorial notes. 
%% 
%% Copyright (C) 2003-2005 Uwe L"uck--author-maintained. 
%% 
\def\fileversion{1.3c} \def\filedate{2005/10/03} 
%% 
%% This file can be redistributed and/or modified under 
%% the terms of the LaTeX Project Public License; either 
%% version 1.3 of the License, or any later version.
%% The latest version of this license is in
%%   http://www.latex-project.org/lppl.txt
%% We did our best to help you, but there is NO WARRANTY. 
%% 
%% Please send your comments via 
%% 
%%   http://www.contact-ednotes.sty.de.vu 
%% 
%% * USAGE: * 
% 
% *Requirements/overview:* 
% 
% The package is made for the background of the LaTeX2e macro 
% package and enhances functionality of the following packages: 
% 1.) Stephan I. B"ottcher's `lineno.sty' for printing line 
%     numbers in the margin and a \label version \linelabel 
%     relating labels to line numbers; 
% 2.) our `ednotes.sty' for indicating variant readings and 
%     other editorial remarks in separate footnote apparatuses; 
% 3.) David Carlisle's `longtable.sty' for multi-page tables. 
%                                                 %% TODO: supertabular etc.!? 
% 4.) our `ltabptch.sty' for a patch of `longtable.sty' 
%     (i.e., optionally, see below). 
% 
% Actually, only the first package is necessary for using the 
% present one. The present one needs your line numbering commands 
% according to the first one and its documentation to which we 
% refer here. We likewise refer to the remaining packages for the 
% details of their functionality. 
% 
% `lineno.sty' version 4.1 and (in case it is used) `ednotes.sty' 
% version 0.8 (onwards) are needed. For obtaining recent versions 
% of required packages, see the CTAN folder 
%     /macros/latex/contrib/ednotes. 
% 
% *Install/load:* 
% 1.) To be used, the present file must be put into a folder 
%     that (La)TeX searches. You should have obtained a file 
%     containing more detailed hints about this. 
% 2.) We recommend loading this file *not* by 
%     \usepackage[<options>]{edtable} but by loading `lineno.sty' 
%     or `ednotes.sty' with package option `edtable'. 
% 3.) To use the package options `longtable' and 
%     `nolongtablepatch' that are described below, enter them 
%     as options for `lineno.sty' or `ednotes.sty'. 
% 
% *User Commands:* 
% 
% 1. The package defines an environment `edtable' -- for its 
% syntax we consider two cases: 
% (a) Let <stdtable> be a tabular environment "like `tabular'". 
% "Like" here means: (i) we have tested it with `tabular', but 
% it should work with many more (e.g., from the `array' and 
% `tabularx' packages) -- which share certain properties of 
% implementation and requirements. Sorry, you must try, or we 
% hope you will (and tell us). (For wizards: <stdtable> may 
% probably be anything using a single \halign and \tabskip=0pt.) 
% Definitively: 
% (ii) LaTeX's standard `array' and other environments are *not* 
% "like" `tabular'. Namely, environments that work only in math 
% mode are not meant here. They are considered below in `b.'. 
% (iii) `longtable' from the `longtable' package of the `tools' 
% bundle neither is meant. An option of the present package 
% deals with it as described below. Neither `supertabular' is 
% meant. 
% (iv) In general, usage with tabular environments that can 
% break across pages as in (iii) is not recommended, at least 
% when working with `ednotes.sty'. Even if some worked here, a 
% shortcoming with `ednotes.sty' would be that the footnotes can 
% appear on bad pages. 
% -- Now the syntax is: 
%    \begin{edtable}{<stdtable>}<args><entries>\end{edtable}
% -- where <args> and <entries> are usual arguments and entries 
% for <stdtable>. So an example is: 
%    \begin{edtable}{tabular}{cc} 
%      left upper & right upper \\ left lower & right lower 
%    \end{edtable} 
% This produces just what <stdtable> does in an extra line, 
% only adding line numbers in the margin and processing `ednotes' 
% commands in the entries appropriately. 
% (b) Let <stdarray> be an "array environment" like -- standard 
% LaTeX's `array'! "Like" here means (i) ... analogously to 
% <stdtable> above. (ii) "Text" ... oh, sorry, this is not clear 
% to me at present, and I am in a hurry.                 %% TODO 
% (iii) Nothing from the `amsmath' package seems to work here, 
% sorry, I have tried a lot ... (iv) For standard LaTeX's 
% `eqnarray', it is better to try the `linenomath' environment 
% of `lineno.sty' [with package option `mathlines']. Its 
% modifications in `amsmath' produce (at best) a spurious line 
% number with the `linenomath' environment (up to now). 
% -- Now the syntax is: 
%    \begin{edtable}[<$$$>]{<stdarray>}
%      <args><entries>\end{edtable}
% -- where <args> and <entries> are usual arguments and entries 
% for <stdarray>. <$$$> can be one of `$' or `$$'. Indeed, the 
% <stdtable> syntax above (without [<$$$>]) *does not work* 
% inside $...$ or $$...$$. -- An example: 
%    \begin{edtable}[$$]{array}{cc}
%      a_{11} & a_{12} \\ a_{21} & a_{22}
%    \end{edtable}
% Now, this produces just what <stdarray> does in an extra line 
% etc. as with <stdtable>. However, \linelabel and `ednotes.sty' 
% footnotes may need the `mathrefs' option of `lineno.sty'. For 
% the difference between `[$]' and `[$$]', see below. 
% 
% 2. When working with `ednotes.sty', in 
%   \Anote{L1\<L2\>L3}{NOTE}
% L2 may contain &'s and \\'s, but L1, L3 must not! Analogously 
% for \Bnote, etc., \Anotelabel...\donote..., etc. -- Well this 
% holds for <stdtable>, hardly for <stdarray> ...        %% TODO 
% 
% 3. On positioning: You may have wondered about `extra line' 
% above. This means that `edtable' starts a new line at 
% \begin{edtable} and at \end{edtable}.          %% TODO: sure!? 
% (a) It should be placed within a `center', `flushleft', or 
% `flushright' environment for proper (vertical) spacing, but 
% also works without. However, with <stdarray> and optional 
% parameter `$$' of `edtable' (i.e., \begin{edtable}[$$]...), 
% you can obtain the usual math display spacing *within a 
% paragraph*; especially, the vertical space is less when the 
% previous line is short ... and so on. 
% (b) Horizontal positioning of line numbers (usually) needs a 
% second run (after changing a table)! %% TODO: automatic warning. 
% (For wizards: It may fail if some of \leftskip, \rightskip, 
% \linewidth, and \@totalleftmargin are used in an unusual way.) 
% A <dimen> register \ETextraoffset is provided whose value is 
% 0pt by default and which additionally moves line numbers 
% to the left (right) if given a positive (negative) value. 
%                                               %% TODO: any use? 
% 
% *Package options:* 
% 
% 1. Option `longtable' adjusts the `longtable' environment 
% defined by David Carlisle's longtable.sty for use with 
% `lineno.sty' and `ednotes.sty'. The option makes `longtable' 
% environments appear with line numbers in the margin, according 
% to `lineno.sty', and process `ednotes.sty' commands if line 
% numbering is active according to `lineno.sty'. 
% [We maintain an alternative package with just this function 
% in a slightly different implementation.] %% -> ulnltab.sty. 
% Lemmas may go across table entries as with `edtable' (see above). 
% ---There might be options like `supertabular' for adjusting 
% other tabular environments that cannot be handled by the 
% `edtable' environment provided here---they have not been 
% implemented yet!                                             %% TODO 
% 
% 2. Option `nolongtablepatch' avoids loading/asking for 
% `ltabptch.sty'. I.e.: according to LaTeX bugs database, 
% tools/3180 and tools/3485, there have been problems with 
% vertical spacing around `longtable' environments. By default 
% the present package loads our `ltabptch.sty' or asks for it. 
% Option `nolongtablepatch' overrides this. This is useful when 
% you don't want to have the patch, especially when you use an 
% "emergency stop" installation of TeX. 
% 
% *Wizard interface:* 
% Macros \@ET@makeLineNumber, \@ET@use@outerhook, 
% \@ET@execute@outerhook, \@ET@ampnotes \@ET@startlinewith, 
% \@ET@trivialize@linelabel are provided as tools for adjusting 
% tabular environments for use with `lineno.sty' and 
% `ednotes.sty'. \@ET@step@linenumber is \let \stepLineNumber 
% (from `lineno.sty'), but could be used as a hook for 
% something different. See Environment `edtable' and Option 
% `longtable' below for examples of application. 
%                                        %% TODO: specification here. 
% 
%
%% * Acknowledgements: * 
% 
% Stephan I. B"ottcher told us how to do it in extensive discussion 
% and by providing some first code lines. We changed these essentially 
% in some respects, but kept his general ideas and some parts of his 
% macros, the latter even without knowing what we are doing. 
% 
% v1.3 is due to a request by Martin Brandenburg. 
% 
%  * Now for internals: * 
% 
\NeedsTeXFormat{LaTeX2e}[1994/12/01] 
% 1994/12/01: \newenvironment* etc. %% TODO: more recent needed? 
\ProvidesPackage{edtable}[\filedate\space v\fileversion\space 
  arrays with lineno + ednotes (ul)] 
% 
% Alternative ideas for implementation: 
% 1. There is a German package `TABMAC' enhancing `EDMAC' (cf. 
% documentation of `ednotes.sty'). We could have rewritten its 
% macros so it would work with `lineno.sty' and `ednotes.sty' 
% in place of `EDMAC'. [TODO: "tabmac.sty"] 
% 2. We redefine `longtable' by Option `longtable' because 
% there seems to be only one reasonable use of the `longtable' 
% environment in the course of a critical edition. This may be 
% different for environments like `array' and `tabular' which 
% can be used within text lines. Therefore, these environments 
% are not redefined. 
% 3. One might use \everycr, however: (a) it is executed 
% before the first row, (b) it is executed in fake lines that 
% `longtable' uses. 
% 4. As an alternative to \everycr, there is the approach of 
% redefining \cr and \crcr for setting \noalign. This needs 
% redefining \@tabularcr etc.---not nice. We use this approach 
% here for `longtable' which uses a stretching \tabskip. 
% For \tabskip=0pt, we attach line numbers by a template. 
% 
% \RequirePackage{lineno}[2004/10/06] 
% Wanted to check lineno version--causes unknown option error. 
% See LaTeX bug latex/3730. 

% Options: 

%% TODO: underful page with `longtable.sty'!? 
\let\if@ET@longtable\iffalse % \newif\if@ET@longtable@ 
\DeclareOption{longtable}{\let\if@ET@longtable\iftrue} 
\let\if@ET@ltabptch\iftrue 
\DeclareOption{nolongtablepatch}{\let\if@ET@ltabptch\iffalse}
\ProcessOptions

% Redefine \longtable if option: 
\if@ET@longtable
  % Stephan's direction for attaching a line number to each row 
  % is using \noalign in the course of \\. 
  % However, (1) the user should not worry about closing the table 
  % with \\ or without, and (2) the line number thing should not 
  % happen twice if \\ is the last token before \end{longtable}. 
  % Our solution: attach something to the beginning of \endlongtable 
  % which attaches line number unless an unsucceeded \\ has done it. 
  % This thing is activated by each row start and turned off by \\. 
  % Since the switch at row start may happen to be in a pbox, 
  % let it act globally on \endlongtable. (The \crcr at the beginning 
  % of \endlongtable must not be changed directly, since original 
  % \crcr may be required in table entries using \oalign etc.) 
  % 
  \RequirePackage{longtable}%
%   \IfFileExists{longtable.sty}{\RequirePackage{longtable}}%
%                               {\RequirePackage{longtabl}}%
% For Atari problem, it suffices to rename `longtable.sty' 
% into `longtabl.sty'. 
% 
% Patch for tools/3180 and tools/3485 of LaTeX bug database:
 \if@ET@ltabptch
  \IfFileExists{ltabptch.sty}{\RequirePackage{ltabptch}}{% 
    \PackageError{edtable}{% 
      ltabptch.sty (for improving spacing around\MessageBreak
      longtable) missing! Be sure to use it always\MessageBreak 
      or never!%
    }{% 
      To omit ltabptch.sty *and* escape this error,\MessageBreak 
      use package option `nolongtablepatch'.%
    }%
 }
 \fi 
  \let\@ET@@longtable\longtable 
  \def\longtable{% 
    \ifLineNumbers 
      \expandafter\@ET@longtable 
    \else 
      \let\@ET@sw@cr\@ET@crcr % ... in \endlongtable. 
      \expandafter\@ET@@longtable 
    \fi 
  } 
  \def\@ET@longtable{% 
  % Since we have made it anyway, we use the method of redefining 
  % \halign for inserting the activating row start as well. 
  % However, redefinition must be repeated before every \LT@bchunk. 
  % \longtable and \LT@get@withs are good places for this. 
    \@ET@startlinewith\@ET@sw@cr@on 
    \@ET@trivialize@linelabel 
    \@ET@use@outerhook 
    \@ET@ampnotes 
    \let\LT@tabularcr\@ET@LT@tabularcr 
    \expandafter\def\expandafter\LT@get@widths\expandafter 
      {\LT@get@widths\@ET@startlinewith\@ET@sw@cr@on}
    % Admittedly, we could make it less of a hack by using @{...} 
    % ---we could then leave \LT@get@widths untouched. 
    \@ET@@longtable 
  } 
  \def\@ET@sw@cr@on{\global\let\@ET@sw@cr\@ET@cr@attach} 
  % We are hacking a longtable version offering 
  %   \def\LT@tabularcr{%
  %     \relax\iffalse{\fi\ifnum0=`}\fi
  %     \@ifstar
  %       {\def\crcr{\LT@crcr\noalign{\nobreak}}\let\cr\crcr
  %        \LT@t@bularcr}%
  %       {\LT@t@bularcr}}
  % We need a redefinition of \cr which is not overridden by \@ifstar: 
  \def\@ET@LT@tabularcr{%
    \relax\iffalse{\fi\ifnum0=`}\fi
    \def\cr{\@ET@sw@cr}% 
    % So \crcr is affected by change of \@ET@sw@cr, cf. below. 
    \let\crcr\cr 
    \@ifstar
      {\gdef\@ET@sw@nobreak{\nobreak 
       \global\let\@ET@sw@nobreak\relax}% 
  %     {\def\cr{\@ET@sw@cr\noalign{\nobreak}}\let\cr\crcr
  % Why didn't this work? %% TODO: try shorter again. 
       \LT@t@bularcr}%
      \LT@t@bularcr 
  %     {\let\cr\@ET@sw@cr \let\crcr\cr
  %      \LT@t@bularcr}% This accompanied \def\cr... above. 
  }
  % Attach \@ET@sw@cr to beginning of \endlongtable: 
  \expandafter\def\expandafter\endlongtable\expandafter 
    {\expandafter\@ET@sw@cr\endlongtable}
  \def\@ET@cr@attach{% Actually attaching line numbers. 
    \@ET@crcr\noalign{% Basically Stephan's approach. 
  % If we were not careful, following box containing line number 
  % could fool interline glue after longtable, even if tools/3485 
  % is repaired in some way. This box should have same depth as 
  % the line composed previously. 
      \nobreak %% \@ET@ex... might cause page break. 2003/10/30. 
      \setbox\z@\@ET@makeLineNumber 
      \ht\z@-\prevdepth \dp\z@\prevdepth \box\z@ 
      \@ET@step@linenumber 
      \global\let\@ET@sw@cr\@ET@crcr % ... if called by \\. 
  % This also resets the \crcr starting \LT@echunk following 
  % \@xargarraycr or \@yargarraycr in \LT@argtabularcr. 
  % \let...\relax seems to suffice at well, but in case ... 
      \@ET@execute@outerhook %% 2003/10/30. 
      \@ET@sw@nobreak 
%       \@ET@execute@outerhook 
    }% 
  } 
  \let\@ET@crcr\crcr 
  \global\let\@ET@sw@nobreak\relax % Just to remind ... 
\fi 
 
\let\@ET@step@linenumber\stepLineNumber 
% \def\@ET@step@linenumber{\global\advance\c@linenumber\@ne}
\def\@ET@makeLineNumber{\hb@xt@\z@{\makeLineNumber}} 
%% TODO: export to lineno.sty!? 
% Special \halign: 
% For `array' etc., we insert line numbers by a leftmost template. 
% @{...} in the last argument of `array' etc. is difficult for this 
% since `tabular*' has an additional argument. So we redefine 
% \halign to put something to the right of the next \bgroup. 
% Now, as a macro, \halign would break in an \edef or \xdef. 
% Horribly, this danger has become quite real in longtable.sty's 
% definition of \LT@bchunk. Only its latest version 4.10 has 
% preceded \halign by a \noexpand (for mathtext.sty which 
% redefines \halign as well). We need not rely on such a 
% provision if we let \halign expand to \the<token register> 
% for some token register. However, using \toks@ or \@temptokena 
% is neither very safe---might be filled by macro ahead with 
% something new. So reserve an own token register. 
\newtoks\@ET@toks 
\@ET@toks{\@ET@specialhalign} 
% v1.3: In 'AMSmath', there are \halign's followed by explicit 
% left braces. Thus '\def\@ET@specialhalign#1\bgroup{%' broke. 
%% TODO ... 
\def\@ET@specialhalign{%
  \ifmeasuring@ \expandafter\@firstoftwo 
% v1.3 2005/03/04, for `amsmath'. 
  \else \expandafter\@secondoftwo 
  \fi
  {\let\halign\@ET@@halign \halign}% 
  {\@ifnextchar\bgroup\@ET@replace@arg\@ET@sphalign@to}}
%% TODO: change back, commenting out code above, report 
%%       error with `alignat'. 
%   \@ifnextchar\bgroup\@ET@replace@arg\@ET@sphalign@to}
% If `amsmath' not loaded (v1.3): 
\AtBeginDocument{\@ifundefined{measuring@true}{% 
  \let\ifmeasuring@\iffalse}\relax}
\def\@ET@replace@arg#1{%
  \def\@EN@tempa{#1}\def\@EN@tempb{\bgroup}% Corr. after v1.3b. 
  \ifx\@EN@tempa\@EN@tempb 
    \def\@EN@tempa{\@ET@sphalign@to\bgroup}%
  \else 
    \def\@EN@tempa{\@ET@sphalign@to{#1}}%
% This may be wrong, #1 might be `t' from `to' ... 
  \fi 
  \@EN@tempa}
\def\@ET@sphalign@to#1\bgroup{% 
  \let\halign\@ET@@halign % Reset for nested arrays. 
  \halign#1\bgroup 
%  \ifmeasuring@\else % For `amsmath', moved backwards. 
    \@ET@startline % [Wizard interface, via \@ET@starlinewith.] 
%  \fi 
}
% Wizard interface: 
\def\@ET@startlinewith{% Next token precedes preamble. 
%   \let\@ET@@halign\halign % Or \AtBeginDocument? 
% ... indeed: bad loop with long longtable (\LT@get@widths!?) 
  \def\halign{\the\@ET@toks}% 
  \let\@ET@startline 
} 
\AtBeginDocument{\let\@ET@@halign\halign} 
% Or save it at start of environment only 
% (don't repeat inside longtable). 
% 
% Outer hook for inserts: (wizard interface) 
\def\@ET@execute@outerhook{% To be placed outside inner mode. 
  \@ET@outerhook \global\let\@ET@outerhook\@empty 
} 
\global\let\@ET@outerhook\@empty % Just to remind: global! 
% \@EN@hookfn (ednotes) sends to outer hook: 
\def\@ET@use@outerhook{% Wizard interface. 
  \def\@EN@hookfn{\g@addto@macro\@ET@outerhook}% 
}%% TODO: move last line to `ednotes', \let\@ET@use...\@empty. 
%%        But this requires re-installing both packages 
%%        at the same time. See the `ampnotes' thing as well. 
% 
% Trivialize \linelabel: (wizard interface) 
\def\@ET@trivialize@linelabel{\let\linelabel\@ET@linelabel}
\def\@ET@linelabel{% 
  \protected@edef\@currentlabel{\theLineNumber}% 
  \label
}
% Change ampersand at \Anote etc.: (wizard interface) 
%% 2003/10/31. 
% & is changed by \Anote etc. No \begin...\endgroup, 
% next \\ or & after % note/donote command switches back. 
% ---Global change seems to break table setup. 
\begingroup 
\gdef\@ET@hideamps{\catcode`\&\active}
\@ET@hideamps 
\gdef\@ET@ampnotes{% 
  \let&\@ET@hideamp 
  %% & would be undefined after \\ in lemma. 
  \let\@ET@EN@rnote\@EN@note 
  \def\@EN@note{\@ET@hideamps\@ET@EN@rnote}%
  \let\@ET@EN@rnotelb\@EN@notelabel 
  \def\@EN@notelabel{\@ET@hideamps\@ET@EN@rnotelb}%
} 
%% TODO: & and \\ in \@EN@lemmaexpands!? 
\endgroup 
\def\@ET@hideamp{&}

\newenvironment*{edtable}[2][]{% 
% #1 $ or $$, #2 standard environment name. 
%% TODO: star version!? cf. lineno.sty's `numquote'. 
  \def\@ET@mode{#1}% 
  \def\@ET@currenvir{#2}% 
  \ifhmode \ifnum\the\lastpenalty=-\@M\else 
% \par must be executed for printing/stopping line numbers: 
    \@centercr\relax \noindent 
  \fi \fi 
  \ifvmode \noindent \fi % Otherwise linenumbers are indented 
% -- however, not recommended. 
  \@ET@use@outerhook 
  \@ET@trivialize@linelabel 
  \@ET@ampnotes 
  \@ET@startlinewith\@ET@normal@startline 
  \global\advance\c@linenumber\m@ne % Stepping correction. 
% (Must come after closing previous paragraph.)
% Calculate offset: 
  \global\advance\c@ET@array\@ne 
% Saving/calling width of table (`longtable's algorithm). 
% Test if there is \@flushglue on the left (center or flushleft): 
  \edef\@EN@tempa{\the\@flushglue}% 
% ... v1.3: fool this for "$$". 
  \in@{$$}{#1\@nil}% \in@{#1}{#2} searches #1 in #2#1 ... 
  \edef\@EN@tempb{\the\ifin@\@flushglue\else\leftskip\fi}% 
  \ifx\@EN@tempa\@EN@tempb 
% Assume \@ET@offset is 0pt else here. 
    \@ET@offset\linewidth 
    \advance\@ET@offset-% 
      \@ifundefined\@ET@arraywidth@csn % Shortened for v1.3. 
        {\linewidth\G@refundefinedtrue 
         \PackageWarningNoLine{edtab}{^^JLine numbers at 
           \@ET@currenvir\space need \jobname.aux}}% 
        {\csname\@ET@arraywidth@csn\endcsname}% 
% Test if \@flushglue on the right (center): 
% ... v1.3: fool it again. Repeat \in@ in case ... 
    \in@{$$}{#1\@nil}%
    \edef\@EN@tempb{\the\ifin@\@flushglue\else\rightskip\fi}% 
    \ifx\@EN@tempa\@EN@tempb \divide\@ET@offset\tw@ \fi 
  \fi 
  \advance\@ET@offset\@totalleftmargin 
  \advance\@ET@offset\ETextraoffset % Offset ready. 
  \setbox\@tempboxa\hbox\bgroup 
% v1.3: `alignat' complains later when this is \vbox instead. 
%    \vbox\bgroup % Tried in vain. 
    \ifx\@ET@mode\@empty\else $\fi 
    \csname#2\endcsname 
}{% 
    \csname end\@ET@currenvir \endcsname 
    \ifx\@ET@mode\@empty\else $\fi 
  \egroup 
  \@ET@step@linenumber % Stepping correction. 
  \if@filesw
    \immediate\write\@auxout{%
      \gdef\expandafter\noexpand
        \csname\@ET@arraywidth@csn\endcsname
          {\the\wd\@tempboxa}}%
%% TODO: warning if changed!? 
  \fi
% No automatic line number at array line: 
  \nolinenumbers 
  \@ET@mode\ensuremath{\vcenter{\box\@tempboxa}}\@ET@mode % v1.3. 
  \@ET@execute@outerhook
  \ifhmode \@centercr\relax \fi 
% \par must be executed for proper restart of printing line numbers 
% (think so). 
  \@endpetrue % Outside \@flushglue environment, avoid indent ahead. 
%% TODO: slightly change for math mode around? Or give an error 
%%       in math mode. 
} 
%% TODO: make \edtable \outer!? 
\def\@ET@normal@startline{%
  \@ET@step@linenumber 
  \llap{\@ET@makeLineNumber \hskip\@ET@offset}% 
} 
\newdimen\@ET@offset 
\newdimen\ETextraoffset 
%% TODO: export to lineno.sty!? 
\newcount\c@ET@array 
\def\@ET@arraywidth@csn{ET@a@\romannumeral\c@ET@array}
% 
%% TODO: .dtx 
\endinput 

%% VERSION HISTORY: 
v0.22 2003/01/13  First version, named `edtab02.sty', sent around, 
                  together with ednotes.sty. 
v0.23 2003/01/22  Added version history. 
v0.24 2003/01/27  Copyright notice. 
%%% v0.3  2003/03/03  Requires linenox0.sty. %% RETREATED 
%% TODO: reconsider,  see `lineno[x].sty'. 
v0.25 2003/03/05  Added <ednotes.sty@web.de>. 
v0.26 2003/03/23  Added \@ET@startlinewith to wizard command list; 
                  moved redefinition \LT@get@widths from option code 
                  into \@ET@longtable so this really happens in 
                  line number mode only; moved \let\@ET@@halign\halign 
                  from \@ET@startlinewith to \AtBeginDocument. 
v0.27 2003/06/02  Added \ifvmode \noindent \fi to `edtable' definition; 
      2003/06/10  added `lemma cannot run' to instructions. 
v0.28 2003/10/31  \@ET@cr@attach: moved \@ET@execu..., added \nobreak. 
                  Added \@ET@ampnotes and documentation: now working 
                  across entries. 
v1.0  2004/05/13  `ednotes.sty' etc., updated copyright. Renamed as 
                  `edtable.sty' for TUGboat article. 
                  \RequirePackage{lineno}, changed doc. accordingly. 
                  Removed `may be released under different name'. 
v1.10 2004/07/27  Looking for `longtabl.sty' for my Atari! 
      2004/08/22  Added warning (screen/documentation) concerning 
                  ltabptch.sty. 
      2004/08/23  Added suggestion of option `nolongtablepatch'; 
                  LPPL v1.3. 
v1.2  2004/08/31  Rearranged preamble concerning maintenance, 
                  removed `preliminary release'. 
      2004/10/06  \newif -> \let...; option `nolongtablepatch'; 
                  changed documentation accordingly and for 
                  loading edtable.sty by lineno/ednotes option; 
                  \let\@ET@step@linenumber\stepLineNumber; use 
                  \ifLineNumbers. 
      2004/10/07  Needed version numbers. 
      2004/10/08  ltabptch warning -> error! 
      2004/10/11  Disabled \RequirePackage{lineno}[...]; undid 
                  the `longtabl.sty' thing from 2004/07/27. 
      2004/10/12  latex/3730. 
v1.2a 2004/11/07  LPPL v1.3a. 
v1.2b 2005/01/10  Contact via http. 
v1.3b 2005/03/04  Support for environments like `array' 
                  environment. The description of `edtable' was 
                  wrong in this respect! 
v1.3  2005/03/07  Adaptations in documentation, and extended usage 
                  instructions very much, correcting some 
                  errors as well. Acknowledgement to M. B. 
v1.3a 2005/03/09  Corrected numbering in `usage'. 
v1.3c 2005/03/15  \@centercr\relax, TODO on math mode. 
      2005/04/09  `editory' -> `editorial'.