%D \module
%D   [       file=typo-brk,
%D        version=2009.03.27, % code moved from core-spa.mkiv
%D          title=\CONTEXT\ Typesetting Macros,
%D       subtitle=Breakpoints,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright=\PRAGMA]
%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 Typesetting Macros / Breakpoints}

\unprotect

\registerctxluafile{typo-brk}{1.001}

\definesystemattribute[breakpoint] \chardef\breakpointattribute \dogetattributeid{breakpoint}

% compound stuff (under construction)

\newbox\breakpointbox

\exhyphenchar\minusone % we use a different order then base tex, so we really need this

\newcount \maxbreakpointsid

\unexpanded\def\definebreakpoints
  {\dosingleargument\dodefinebreakpoints}

\def\dodefinebreakpoints[#1]%
  {\ifcsname\??bp:#1\endcsname \else
     \global\advance\maxbreakpointsid\plusone
     \setxvalue{\??bp:#1}{\the\maxbreakpointsid}%
   \fi}

\def\installbreakpoint
  {\dotripleempty\doinstallbreakpoint}

% hm, we cannot prebuild lists, font dependent
%
% -- type nleft nright language left right middle
%
% -- we might eventually stick to only method 5

\def\doinstallbreakpoint[#1][#2][#3]%
  {\ifcsname\??bp:#1\endcsname
     \begingroup
     \getparameters[\??bp][\c!type=1,\c!nleft=3,\c!nright=3,\s!language=,\c!left=,\c!right=,\c!middle=,#3]%
     \ctxlua{breakpoints.setreplacement(\csname\??bp:#1\endcsname, "#2", "\@@bplanguage", {
            kind =  \@@bptype,
           nleft = "\@@bpnleft",
          nright = "\@@bpnright",
           right = "\@@bpright",
            left = "\@@bpleft",
          middle = "\@@bpmiddle"
     } )}% todo: table
     \endgroup
   \fi}

\def\setbreakpoints
  {\ctxlua{breakpoints.enable()}%
   \gdef\setbreakpoints[##1]{\attribute\breakpointattribute\csname\??bp:##1\endcsname\relax}%
   \setbreakpoints}

\letvalue{\??bp:\s!reset}\attributeunsetvalue

\definebreakpoints[compound]

\installbreakpoint [compound] [+] [\c!nleft=3,\c!nright=3,\c!type=1] % middle=+,left=,right=
\installbreakpoint [compound] [-] [\c!nleft=3,\c!nright=3,\c!type=1] % middle=+,left=,right=
\installbreakpoint [compound] [/] [\c!nleft=3,\c!nright=3,\c!type=1] % middle=+,left=,right=
\installbreakpoint [compound] [(] [\c!nleft=3,\c!nright=3,\c!type=2] % type=5,middle=(,left=(-,right=
\installbreakpoint [compound] [)] [\c!nleft=3,\c!nright=3,\c!type=3] % type=5,middle=),left=,right=-)

% \start \hsize 1.5cm \setbreakpoints[compound]
%     \installbreakpoint [compound] [-] [nleft=3,nright=3,type=5,left=,right={-},middle={-}]
%     \installbreakpoint [compound] [(] [nleft=3,nright=3,type=5,left=,right={(-},middle={(}]
%     \installbreakpoint [compound] [)] [nleft=3,nright=3,type=5,left={-)},right=,middle={)}]
%     composed-word\par composed(word)\par
% \stop

% \mainlanguage[czech]
% \installbreakpoint [compound] [\number`-] [language=cs,nleft=3,nright=3,type=4]
% \setbreakpoints[compound]
% \start \hsize 1mm test-test \par \stop

% \setbreakpoints[compound]

\protect \endinput