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%%%%%%%%%%%%%%%%%%%%%%%%%%% verses.sty %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% verses.sty
% utility for ArabTeX
% macros for typesetting Arabic verses in two columns
% usage: load as a package, or after loading ArabTeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% (c) Klaus Lagally
% Institut fuer Formale Methoden der Informatik
% Universitaet Stuttgart
% 08.02.2006
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Usage:
% (use within an Arabic environment)
%
% \setversedim #1#2 % define the layout (within a group):
% #1 = length of both half-verses
% #2 = separation distance = length of a connection, if present
% Variant:
% \setversedim #1[#2]#3 % for half-verses of unequal length
% #1 = length of first (=right) half-verse
% #2 = length of second (=left) half-verse
% #3 = separation distance = length of a connection, if present
%
% \halfverses #1#2 % typeset two separated half-verses
% #1 = text of first (=right) half-verse
% #2 = text of second (=left) half-verse
% Variant:
% \halfverses #1[#2]#3 % typeset two connected half-verses
% #1 = text of first (=right) half-verse
% #2 = text of connection
% #3 = text of second (=left) half-verse
%
% Alternative (if preferred):
%
% \connverses #1#2#3 % = \halfverses #1[#2]#3
%
% Note: use keshide to attach the connection, if required
% Note: if the verses do not fit on the line, they will be put on
% two lines, flush to the margins.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifx \verseatcode \undefined \else \expandafter \endinput
\fi % load only once
\chardef \verseatcode = \catcode`\@ \catcode`\@ = 11
\a@ident {verses.sty} {3.12 verses in two columns} {08.02.2006}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% define the layout, verses will be centered
\newdimen \a@hvlen \newdimen \a@hvsep
\newdimen \a@hvind \newdimen \a@@hvlen
\def \setversedim #1#2{% set lengths of half-verse, [separation]
\ifx \LaTeX \undefined \a@hvind \hsize
\else \a@hvind \textwidth \fi
\a@hvlen #1\relax \advance \a@hvind -\a@hvlen
\ifx [#2\def \next {\set@verseI [}\else
\a@@hvlen \a@hvlen \def \next {\set@@verse {#2}}\fi \next }
\def \set@verseI [#1]{% optional parameter
\a@@hvlen #1\relax \set@@verse }
\def \set@@verse #1{% separation
\advance \a@hvind -\a@@hvlen \a@hvsep #1\relax
\advance \a@hvind -\a@hvsep \divide \a@hvind 2 }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def \connverses #1#2#3{% first half-verse, connection, second half-verse
\cond{\ifdim 0pt > \a@hvind }%
{\spreadbox \a@hvlen {#1}\\ \hfill }% first block
{\noindent \hskip \a@hvind \relax \spreadbox \a@hvlen {#1}}\fi
\spreadbox \a@hvsep {#2}% separator
\spreadbox \a@@hvlen {#3}% second block
\tracingmacros 0
\par }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% macro for two half verses
\def \halfverses #1#2{% normal case
\connverses {#1}{\hfill}{#2}}
\def \a@c@halfverses #1#2{% optional parameter?
%\tracingmacros 1
\cond{\ifx [#2}{\half@verses {#1}[}%
{\half@verses {#1}[\hfill]{#2}}\fi }
\def \half@verses #1[#2]#3{% first[mid]second
\test@token \connverses {#1}{#2}{#3}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% define a default layout
% do this within a group!
%\setversedim {2.0in}{0.3in}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% make macros known to ArabTeX
\allowarab \connverses \all@wtw@ \setversedim
\catcode `\@ = \verseatcode
\endinput
%%%%%%%%%%%%%%%%%%%%%%%% EOF %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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