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%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}{\number\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{typesetters.breakpoints.setreplacement(\csname\??bp:#1\endcsname, "#2", "\reallanguagetag\@@bplanguage", {
kind = \@@bptype,
nleft = "\@@bpnleft",
nright = "\@@bpnright",
right = "\@@bpright",
left = "\@@bpleft",
middle = "\@@bpmiddle"
} )}% todo: table
\endgroup
\fi}
\unexpanded\def\setbreakpoints[#1]%
{\ctxlua{typesetters.breakpoints.set(\number\csname\??bp:#1\endcsname)}}
\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
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