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% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 11.5.5, p. II-93.
% Original source in file "par2.TEX", starting line 2264.
\wlog{L: "genhead.tip" ["par2.TEX," l. 2264, p. II-93]}%
% This file DOES belong to format "texip."
\InputD{vsmax.tip}
\InputD{box-mac.tip}
\InputD{parin.tip}
\newtoks\EveryHeading
\EveryHeading = {}
\catcode`\@ = 11
\newcount\@GenericHeadingCount
\newcount\@GenericHeadingIndent
\def\LineBreakHeading{%
\errmessage{%
\string\LineBreakHeading/\string\LineBreakToc:
can only be used inside a heading.}%
}
\let\LineBreakToc = \LineBreakHeading
\def\IgnoreInRunnningHead #1{%
#1%
}
\def\GenericHeading #1#2#3#4#5{%
\par
\the\EveryHeading
\@GenericHeadingCount = #1
\@GenericHeadingIndent = #5
\MaxVskip{#2}%
\ifdim\leftskip = 0pt
\else
\message{\string\GenericHeading: \noexpand\leftskip
is non-zero, forgotten to terminate a list?}%
\fi
\begingroup
\interlinepenalty = 10000
\parindent = 0pt
\parskip = 0pt
\ifnum #4 = 1
\hyphenpenalty = 10000
\fi
\ifnum #3 = 1
\rightskip = 0pt plus 50pt
\fi
\@GenericHeading
}
\def\@GenericHeading #1#2#3#4#5#6#7{%
#3%
\def\LineBreakHeading{\hfil\break}%
\def\LineBreakToc{ }%
\ifdim #4 > 0pt
\ifnum\@GenericHeadingIndent = 0
\hangindent = #4
\hangafter = 1
\leavevmode
\hbox to #4{#5\hfil}%
\else
\leavevmode
\hbox to #4{#5\hfil}%
\fi
\else
\setbox0 = \hbox{#5\hskip -#4}
\ifnum\@GenericHeadingIndent = 0
\hangindent = \wd0
\hangafter = 1
\leavevmode
\box0
\else
\leavevmode
\box0
\fi
\fi
#6%
\if\NameDefinedConditional{WriteToAuxSpecial}%
\def\LineBreakToc{\hfil\break}%
\def\LineBreakHeading{ }%
\WriteToAuxSpecial{toc}{\the\@GenericHeadingCount}%
{#5}{#7}{\PrintCounter{PageNo}}%
\fi
\par
\endgroup
\nobreak
\vskip #1
\ifnum #2 = 0
\SuppressNextParIndent
\fi
}
\catcode`\@ = 12
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