% lua-widow-control
% https://github.com/gucci-on-fleek/lua-widow-control
% SPDX-License-Identifier: MPL-2.0+
% SPDX-FileCopyrightText: 2021 Max Chernoff

\wlog{lua-widow-control v1.1.3} %%version

\input ltluatex % \LuaTeX{}Base

\clubpenalty=1
\widowpenalty=1
\displaywidowpenalty=0
\interlinepenalty=0
\brokenpenalty=0

\newdimen\lwcemergencystretch
\lwcemergencystretch=3em

\directlua{require "lua-widow-control"}

% Here, we enable font expansion/contraction. It isn't strictly necessary for
% \lwc/'s functionality; however, it is required for the
% lengthened paragraphs to not have terrible spacing. 
\expandglyphsinfont\the\font 20 20 5
\adjustspacing=2

% Define \TeX{} wrappers for Lua functions
\def\lwcenable{\directlua{lwc.enable_callbacks()}}
\def\lwcdisable{\directlua{lwc.disable_callbacks()}}
\def\iflwc{\directlua{lwc.if_lwc_enabled()}}

% Enable \lwc/ by default when the package is loaded.
\lwcenable

% Expansion of some parts of the document, such as section headings, is quite
% undesirable, so we'll disable \lwc/ for certain commands.
\catcode`@=11

% We should only reenable \lwc/ at the end if it was already enabled.
\newif\iflwc@should@reenable

\def\lwc@patch@pre{\iflwc%
    \lwc@should@reenabletrue%
    \lwcdisable%
\fi}

\def\lwc@patch@post{\iflwc@should@reenable%
    \lwcenable%
\fi}

\def\lwcdisablecmd#1{%
    \ifdefined#1
        \expandafter\def\expandafter#1\expandafter{\lwc@patch@pre #1\lwc@patch@post}
    \fi
}
\catcode`@=12

\begingroup
    \suppressoutererror=1
    \lwcdisablecmd{\beginsection} % Sectioning
\endgroup

\endinput
