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%D \module
%D [ file=page-par, % copied from page-lin
%D version=1997.03.31,
%D title=\CONTEXT\ Page Macros,
%D subtitle=Line Numbering,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Page Macros / Paragraph Numbering}
\unprotect
\installcorenamespace {paragraphnumbering}
\installcorenamespace {paragraphnumberingvariants}
\installsimplecommandhandler \??paragraphnumbering {paragraphnumbering} \??paragraphnumbering
\definecounter[\v!paragraph]
\let\showparagraphnumber\relax
\appendtoks
\page_par_check_state
\to \everysetupparagraphnumbering
\unexpanded\def\page_par_check_state
{\rawprocesscommacommand[\paragraphnumberingparameter\c!state]\page_par_check_state_step}
\def\page_par_check_state_step#1%
{\ifcsname\??paragraphnumberingvariants#1\endcsname
\csname\??paragraphnumberingvariants#1\endcsname
\fi}
\setvalue{\??paragraphnumberingvariants\v!start}%
{\let\showparagraphnumber\page_par_show_number_normal}
\setvalue{\??paragraphnumberingvariants\v!stop}%
{\let\showparagraphnumber\relax}
\setvalue{\??paragraphnumberingvariants\v!line}%
{\let\showparagraphnumber\page_par_show_number_lines}
\setvalue{\??paragraphnumberingvariants\v!reset}%
{\strc_counters_reset\v!paragraph
\let\showparagraphnumber\page_par_show_number_normal}
\unexpanded\def\page_par_show_number_normal
{\strc_counters_increment\v!paragraph
\inleftmargin % todo: \c!location, only a few make sense
{\hfill % no complaints
\tf % \tf normalizes em
\useparagraphnumberingstyleandcolor\c!style\c!color
\convertedcounter[\v!paragraph]%
\kern\paragraphnumberingparameter\c!distance}}
\unexpanded\def\page_par_show_number_lines
{\ifnumberinglines
\page_par_show_number_normal
\fi}
\setupparagraphnumbering
[\c!state=\v!stop,
%\c!location,
%\c!style=,
%\c!color=,
\c!distance=\ifcase\c_page_lines_location2\emwidth\else\zeropoint\fi] % will change
\protect \endinput
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