% Cut Here - line.tex

% These macros maintain the box of lines used for the leaders

\newbox\@linbox
\global\setbox\@linbox\hbox{}
\def\@uplinbox{\global\setbox\@linbox\hbox{}\global\n@l=0\relax
\@uplinboxes}
\def\@uplinboxes{\ifnum\n@l<4\relax\selectligne{\n@l}\ifnum
\l@s=0\relax\else\up@linbox\fi
\global\advance\n@l by 1\relax\@uplinboxes\else\fi}%
\def\up@linbox{\y@ii\l@z\advance\y@ii by-\linthick\relax
\global\setbox\@linbox\hbox{\unhbox\@linbox
\kern-\tenboxwidth\vrule width\tenboxwidth height\l@z depth-\y@ii\relax}}

% This macro makes the leaders
\def\@tenleader#1{\@tenuskip=#1\advance\@tenuskip by2\tenboxwidth\relax
\nobreak\kern-\tenboxwidth\nobreak\cleaders\hbox{\unhcopy\@linbox
\unhcopy\@tenubox}\hskip\@tenuskip\kern-\tenboxwidth\nobreak}

% Everything that follows is similar to the tie macros, except that there is
% no need to place a special character at each end of a line.

% positions x et z de debut des lignes
\newdimen\l@xi\newdimen\l@zi
\newdimen\l@xii\newdimen\l@zii
\newdimen\l@xiii\newdimen\l@ziii
\newdimen\l@xiv\newdimen\l@ziv
% etat des lignes (0= inactive, 1= actif)
%
\newcount\l@si
\newcount\l@sii
\newcount\l@siii
\newcount\l@siv
\newdimen\linthick\linthick0.2pt
%
\def\selectligne#1{{\n@i=#1\relax
\ifnum\n@i<1\relax\n@i=4\fi
\xdef\l@x{\csname l@x\romannumeral\n@i\endcsname}%
\xdef\l@z{\csname l@z\romannumeral\n@i\endcsname}%
\xdef\l@s{\csname l@s\romannumeral\n@i\endcsname}}%
}%
%
% continuation des lignes
\def\clignes{\locx@skip=\x@skip\advance\locx@skip by \n@skip\global\n@l
=0\relax\c@lignes}%
\def\c@lignes{\ifnum\n@l<5\relax\selectligne{\n@l}\ifnum
\l@s=0\relax\else\c@ligne\fi
\global\advance\n@l by 1\relax\c@lignes\fi}%
%
\def\ilin#1#2#3{\selectligne{#1}\global\l@s=1\relax
 \global\l@x=\locx@skip\global\advance\l@x by#2\relax
 \global\l@z=#3\global\advance\l@z by\altportee\relax\up@linbox}
\def\tlin#1{\selectligne{#1}\t@ligne\global\l@s=0\@uplinbox\relax}
%
\def\c@ligne{\y@ii=\x@skip\advance\y@ii by -\l@x
\ifnum\l@s=1\relax
      \raise\l@z\llap{\hbox to\y@ii{\leaders
      \hrule height\z@ depth\linthick\hss}}\relax
      \global\l@x=-1pt
\fi}
%
\def\t@ligne{\y@i=\l@z\relax
\advance\y@i by -\altportee\relax
\y@ii=\locx@skip\advance\y@ii by-\wd@skip\relax
\advance\y@ii by -\l@x\relax
  \ifnum\l@s=1\relax
    \raise\y@i\llap{\vrule height\z@ depth\linthick width\y@ii\hskip\wd@skip}%
\fi}

% The lines are activated by adding \clignes to the \ctenuti macro.

\let\ctenuti@=\ctenuti\def\ctenuti{\ctenuti@\clignes}