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\ProvidesPackage{linebreaker}
\RequirePackage{luatexbase}
\directlua{%
linebreaker = require "linebreaker"
luatexbase.add_to_callback("linebreak_filter", linebreaker.linebreak, "new linebreak callback")
luatexbase.add_to_callback("post_linebreak_filter", linebreaker.post_linebreak, "new linebreak callback")
luatexbase.add_to_callback("hpack_quality", linebreaker.hpack_quality, "Our overfull box reporting function")
}
% linebreaker setup
\ExplSyntaxOn
\keys_define:nn{linebreaker}{
debug .code:n = \directlua{linebreaker.debug=true},
maxtolerance .code:n = \directlua{linebreaker.max_tolerance = tonumber("#1")},
maxemergencystretch .code:n = \directlua{linebreaker.max_emergencystretch = tex.sp("#1")},
maxcycles .code:n = \directlua{linebreaker.max_cycles = tonumber("#1")},
}
\NewDocumentCommand{\linebreakersetup}{m}{
\keys_set:nn {linebreaker} {#1}
}
\ExplSyntaxOff
% enable/disable linebreaker
\NewDocumentCommand{\linebreakerenable}{}{\directlua{linebreaker.active=true}}
\NewDocumentCommand{\linebreakerdisable}{}{\directlua{linebreaker.active=false}}
\endinput
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