%D \module
%D   [       file=core-two, % moved from core-uti
%D        version=1997.03.31,
%D          title=\CONTEXT\ Core Macros,
%D       subtitle=Two Pass Data,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 Core Macros / Two Pass Data}

%D This is a rather old mechanism which has not changed much over
%D time, apart from adding a few more selectors. This code used
%D to be part of \type {core-uti}. The following examples demonstrate
%D the interface.
%D
%D \startbuffer
%D \definetwopasslist{test-1}
%D
%D \gettwopassdatalist{test-1} [\twopassdatalist=]
%D \checktwopassdata  {test-1} [\twopassdata=]
%D \checktwopassdata  {test-1} [\twopassdata=]
%D \gettwopassdata    {test-1} [\twopassdata=]
%D \gettwopassdata    {test-1} [\twopassdata=]
%D
%D \definetwopasslist{test-2}
%D
%D \lazysavetwopassdata{test-2}{1}{x}
%D \lazysavetwopassdata{test-2}{2}{y}
%D \lazysavetwopassdata{test-2}{3}{z}
%D
%D \gettwopassdatalist{test-2} [\twopassdatalist=x,y,z]
%D \checktwopassdata  {test-2} [\twopassdata=x]
%D \checktwopassdata  {test-2} [\twopassdata=x]
%D \gettwopassdata    {test-2} [\twopassdata=x]
%D \gettwopassdata    {test-2} [\twopassdata=y]
%D \gettwopassdata    {test-2} [\twopassdata=z]
%D \gettwopassdata    {test-2} [\twopassdata=]
%D
%D \definetwopasslist{test-3}
%D
%D \lazysavetaggedtwopassdata{test-3}{1}{x}{a}
%D \lazysavetaggedtwopassdata{test-3}{2}{y}{b}
%D \lazysavetaggedtwopassdata{test-3}{3}{z}{c}
%D
%D \findtwopassdata{test-3}{x} [\twopassdata=a]
%D \findtwopassdata{test-3}{y} [\twopassdata=b]
%D \findtwopassdata{test-3}{z} [\twopassdata=c]
%D \findtwopassdata{test-3}{w} [\twopassdata=]
%D
%D \definetwopasslist{test-4}
%D
%D \lazysavetwopassdata{test-4}{1}{A}
%D \lazysavetwopassdata{test-4}{2}{B}
%D \lazysavetwopassdata{test-4}{3}{C}
%D
%D \getfirsttwopassdata{test-4}    [\twopassdata=A]
%D \getlasttwopassdata {test-4}    [\twopassdata=C]
%D \getfirsttwopassdata{test-4}    [\twopassdata=A]
%D \getlasttwopassdata {test-4}    [\twopassdata=C]
%D \getfromtwopassdata {test-4}{1} [\twopassdata=A]
%D \getfromtwopassdata {test-4}{3} [\twopassdata=C]
%D \getfromtwopassdata {test-4}{2} [\twopassdata=B]
%D \stopbuffer
%D
%D \getbuffer \typebuffer

\unprotect

\let\twopassdatalist\empty

\newif\iftwopassdatafound

\registerctxluafile{core-two}{1.001}

%D I'm not that sure if this behaves exactly like mkii. This needs a cleanup.

\def\immediatesavetwopassdata   #1#2#3{\normalexpanded{\noexpand\ctxlua    {jobpasses.save('#1',"#3")}}}
\def\savetwopassdata            #1#2#3{\normalexpanded{\noexpand\ctxlatelua{jobpasses.save('#1',"#3")}}}
\def\lazysavetwopassdata        #1#2#3{\normalexpanded{\noexpand\ctxlatelua{jobpasses.save('#1',"#3")}}}
\def\savetaggedtwopassdata    #1#2#3#4{\normalexpanded{\noexpand\ctxlua    {jobpasses.savetagged('#1','#3',"#4")}}}
\def\lazysavetaggedtwopassdata#1#2#3#4{\normalexpanded{\noexpand\ctxlatelua{jobpasses.savetagged('#1','#3',"#4")}}}

% temp hack: needs a proper \starteverytimeluacode

\def\testtwopassdata{\ifx\twopassdata\empty\twopassdatafoundfalse\else\twopassdatafoundtrue\fi}

% todo: move the edef to lua

\def\definetwopasslist        #1{\ctxlua{jobpasses.define('#1')}}
\def\gettwopassdata           #1{\edef\twopassdata{\ctxlua{jobpasses.get("#1")}}\testtwopassdata}
\def\checktwopassdata         #1{\edef\twopassdata{\ctxlua{jobpasses.check("#1")}}\testtwopassdata}
\def\findtwopassdata        #1#2{\edef\twopassdata{\ctxlua{jobpasses.find("#1","#2")}}\testtwopassdata}
\def\getfirsttwopassdata      #1{\edef\twopassdata{\ctxlua{jobpasses.first("#1")}}\testtwopassdata}
\def\getlasttwopassdata       #1{\edef\twopassdata{\ctxlua{jobpasses.last("#1")}}\edef\noftwopassitems{\ctxlua{jobpasses.count("#1")}}\testtwopassdata}
\def\getnamedtwopassdatalist#1#2{\edef#1{\ctxlua{jobpasses.list("#2")}}}
\def\gettwopassdatalist       #1{\edef\twopassdatalist{\ctxlua{jobpasses.list("#1")}}}
\def\doifelseintwopassdata  #1#2{\ctxlua{jobpasses.doifinlistelse("#1","#2")}}

\let\getfromtwopassdata\findtwopassdata

\protect \endinput