lua-widow-control (9nov21)

git-svn-id: svn://tug.org/texlive/trunk@61002 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 34 insertions, 2 deletions

diff --git a/Master/texmf-dist/tex/lualatex/lua-widow-control/lua-widow-control.sty b/Master/texmf-dist/tex/lualatex/lua-widow-control/lua-widow-control.sty
index d5ef8194f1b..ff3781944fa 100644
--- a/Master/texmf-dist/tex/lualatex/lua-widow-control/lua-widow-control.sty
+++ b/Master/texmf-dist/tex/lualatex/lua-widow-control/lua-widow-control.sty
@@ -1,11 +1,11 @@
 % lua-widow-control
 % https://github.com/gucci-on-fleek/lua-widow-control
 % SPDX-License-Identifier: MPL-2.0+
-% SPDX-FileCopyrightText: 2021 gucci-on-fleek
+% SPDX-FileCopyrightText: 2021 Max Chernoff
 
 \NeedsTeXFormat{LaTeX2e}[2015/01/01] % Formats built after 2015 include \LuaTeX{}Base
 \ProvidesPackage{lua-widow-control}%
-    [2021/10/09 v1.0.0] %%version %%date
+    [2021/11/08 v1.1.0] %%version %%date
 
 \setlength{\clubpenalty}{1}
 \setlength{\widowpenalty}{1}
@@ -24,10 +24,42 @@
 % lengthened paragraphs to not have terrible spacing. 
 \RequirePackage[final]{microtype}
 
+% Define \TeX{} wrappers for Lua functions
 \newcommand{\lwcenable}{\directlua{lwc.enable_callbacks()}}
 \newcommand{\lwcdisable}{\directlua{lwc.disable_callbacks()}}
+\newcommand{\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.
+\RequirePackage{etoolbox}
+
+\newcommand{\lwc@patch@warning}[1]{\PackageWarning{lua-widow-control}{%
+    Patching the \protect#1 command failed%
+}}
+
+% We should only reenable \lwc/ at the end if it was already enabled.
+\newif\iflwc@should@reenable
+
+\newcommand{\lwc@patch@pre}{\iflwc%
+    \lwc@should@reenabletrue%
+    \lwcdisable%
+\fi}
+
+\newcommand{\lwc@patch@post}{\iflwc@should@reenable%
+    \lwcenable%
+\fi}
+
+\newcommand{\lwcdisablecmd}[1]{%
+    \ifdefined#1
+        \pretocmd{#1}{\lwc@patch@pre}{}{\lwc@patch@warning{#1}}%
+        \apptocmd{#1}{\lwc@patch@post}{}{\lwc@patch@warning{#1}}%
+    \fi
+}
+
+\lwcdisablecmd{\@sect} % Sectioning
+
+
 \endinput