blob: ff3781944fab3ee0913d9072e4ff85559a77cffd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
% lua-widow-control
% https://github.com/gucci-on-fleek/lua-widow-control
% SPDX-License-Identifier: MPL-2.0+
% SPDX-FileCopyrightText: 2021 Max Chernoff
\NeedsTeXFormat{LaTeX2e}[2015/01/01] % Formats built after 2015 include \LuaTeX{}Base
\ProvidesPackage{lua-widow-control}%
[2021/11/08 v1.1.0] %%version %%date
\setlength{\clubpenalty}{1}
\setlength{\widowpenalty}{1}
\setlength{\displaywidowpenalty}{0}
\setlength{\interlinepenalty}{0}
\setlength{\brokenpenalty}{0}
% We can't use \\newlength since that makes a \TeX{} "skip", not a "dimen"
\newdimen\lwcemergencystretch
\setlength{\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.
\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
|
