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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 11.2.1, p. II-67.
% Original source in file "par2.TEX", starting line 956.
\wlog{L: "parv-1.tip" ["par2.TEX," l. 956, p. II-67]}%
% This file DOES belong to format "texip."
\catcode`\@ = 11
\newdimen \Delta@XY
\newskip\@ParListBeforeAfter
\newskip\@ParListBetweenLabels
\newskip\@ParListAfterLabel
\newcount\@LabeledParNesting \@LabeledParNesting = 0
\newcount\@LabelCounter
\def\BeginAList #1#2#3#4#5#6#7{%
\par
\bgroup
\advance\leftskip by #1
\advance\rightskip by #2
\advance \@LabeledParNesting by 1
\@LabelCounter = 0
\Delta@XY = #3
\ifdim\Delta@XY < 0pt
\errmessage{\string\BeginAList: negative Delta{xy},
made positive.}%
\fi
\@ParListBeforeAfter = #4
\@ParListBetweenLabels = #5
\@ParListAfterLabel = #6
\SetParIndent{#7}
}
\def\EndAList{%
\par
\vskip\@ParListBeforeAfter
\egroup
}
\def\@GenLabel #1{%
\par
\advance\@LabelCounter by 1
\ifnum\@LabelCounter = 1
\parskip = \@ParListBeforeAfter
\else
\parskip = \@ParListBetweenLabels
\fi
\noindent
\hbox to 0pt{#1}%
\parskip = \@ParListAfterLabel
\ignorespaces
}
\def\ItemLL #1{%
\@GenLabel{%
\hskip -\Delta@XY
#1%
\hfil
}%
}
\def\ItemLR #1{%
\@GenLabel{%
\hss
#1%
\hskip\Delta@XY
}%
}
\def\ItemRL #1{%
\@GenLabel{%
\hskip\Delta@XY
#1%
\hss
}%
}
\def\ItemRR #1{%
\@GenLabel{%
\hfil
#1%
\hskip -\Delta@XY
}%
}
\catcode`\@ = 12
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