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% Kale Ewasiuk (kalekje@gmail.com)
% 2023-07-22
% Copyright (C) 2021-2023 Kale Ewasiuk
%
% Permission is hereby granted, free of charge, to any person obtaining a copy
% of this software and associated documentation files (the "Software"), to deal
% in the Software without restriction, including without limitation the rights
% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
% copies of the Software, and to permit persons to whom the Software is
% furnished to do so, subject to the following conditions:
%
% The above copyright notice and this permission notice shall be included in
% all copies or substantial portions of the Software.
%
% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
% ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
% TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
% PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT
% SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
% ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
% ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
% OR OTHER DEALINGS IN THE SOFTWARE.


\documentclass[11pt,parskip=half]{scrartcl}
\setlength{\parindent}{0ex}
\newcommand{\llcmd}[1]{\leavevmode\llap{\texttt{\detokenize{#1}}}}
\newcommand{\cmd}[1]{\texttt{\detokenize{#1}}}
\newcommand{\qcmd}[1]{``\cmd{#1}''}
\usepackage{url}
\usepackage{xcolor}
\usepackage{showexpl}
\lstset{explpreset={justification=\raggedright,pos=r,wide=true}}
\setlength\ResultBoxRule{0mm}
\lstset{
	language=[LaTeX]TeX,
	basicstyle=\ttfamily\small,
	commentstyle=\ttfamily\small\color{gray},
	frame=none,
	numbers=left,
	numberstyle=\ttfamily\small\color{gray},
	prebreak=\raisebox{0ex}[0ex][0ex]{\color{gray}\ensuremath{\hookleftarrow}},
	extendedchars=true,
	breaklines=true,
	tabsize=4,
}
\addtokomafont{title}{\raggedright}
\addtokomafont{author}{\raggedright}
\addtokomafont{date}{\raggedright}
\author{Kale Ewasiuk (\url{kalekje@gmail.com})}
\usepackage[yyyymmdd]{datetime}\renewcommand{\dateseparator}{--}
\date{\today}


\RequirePackage{penlightplus}

\title{penlightplus}
\subtitle{Additions to the Penlight Lua Libraries}

\begin{document}
%

\maketitle

This package first loads the \cmd{[import]penlight} package.\\
The \texttt{pl} option may be passed to this package to create an alias for \cmd{penlight}.\\
\texttt{globals} option may be used to make several of the functions global (as discussed below).

\subsection*{texlua usage}
If you want to use penlightplus.lua  with the \texttt{texlua} interpreter
(no document is made, but useful for testing your Lua code),
you can access it by setting \cmd{__SKIP_TEX__ = true} before loading. For example:
 \begin{verbatim}
package.path = package.path .. ';'..'path/to/texmf/tex/latex/penlightplus/?.lua'
package.path = package.path .. ';'..'path/to/texmf/tex/latex/penlight/?.lua'
penlight = require'penlight'

__SKIP_TEX__ = true  --only required if you want to use
                     --penlightplus without a LaTeX run
__PL_GLOBALS__ = true -- optional, include global definitions
require'penlightplus'
\end{verbatim}






\subsection*{}

The following global variables are defined:

\llcmd{__SKIP_TEX__} If using the \cmd{penlightplus} package with \cmd{texlua} (good for troubleshooting), set this global before loading \cmd{penlight}\\
The gloals flags below are taken care of in the package options:\\
\llcmd{__PL_}\cmd{GLOBALS__} If using package with \cmd{texlua} and you don't want to set some globals (described in next sections), set this global before to \cmd{true} loading \cmd{penlight}\\
\cmd{__PL_NO_HYPERREF__} a flag used to change the behaviour of a function, depending on if you don't use the hyperref package\\

\subsubsection*{penlight additions}

Some functionality is added to penlight/lua.

\llcmd{pl.hasval(x)} Python-like boolean testing\\
\llcmd{COMP'xyz'()} Python-like comprehensions:\\\url{https://lunarmodules.github.io/Penlight/libraries/pl.comprehension.html}\\
\llcmd{math.mod(n,d)}, \cmd{math.mod2(n)} math modulous\\
\llcmd{string.}\cmd{totable(s)} string a table of characters\\
\llcmd{string.}\cmd{delspace(s)} clear spaces from string\\
\llcmd{pl.}\cmd{char(n)} return letter corresponding to 1=a, 2=b, etc.\\
\llcmd{pl.}\cmd{Char(n)} return letter corresponding to 1=A, 2=B, etc.\\

\llcmd{pl.utils.}\cmd{filterfiles}\cmd{(dir,filt,rec)} Get files from dir and apply glob-like filters. Set rec to \cmd{true} to include sub directories\\


\subsubsection*{A \cmd{pl.tex.} module is added}
\llcmd{add_bkt}\cmd{_cnt(n), }\cmd{close_bkt_cnt(n), reset_bkt_cnt} functions to keep track of adding curly brackets as strings. \cmd{add} will return \cmd{n} (default 1) \{'s and increment a counter. \cmd{close} will return \cmd{n} \}'s (default will close all brackets) and decrement.\\
\llcmd{_NumBkts} internal integer for tracking the number of brackets\\
\llcmd{opencmd(cs)} prints \cmd{\cs}\{ and adds to the bracket counters.\\
\\
\llcmd{_xNoValue,}\cmd{_xTrue,_xFalse}: \cmd{xparse} equivalents for commands\\
\\
\llcmd{prt(x),prtn(x)} print without or with a newline at end. Tries to help with special characters or numbers printing.\\
\llcmd{prtl(l),prtt(t)} print a literal string, or table\\
\llcmd{wrt(x), wrtn(x)} write to log\\
\llcmd{help_wrt}\cmd{(s1, s2)} pretty-print something to console. S2 is a flag to help you find.\\
\llcmd{prt_array2d(tt)} pretty print a 2d array\\
\\
\llcmd{pkgwarn}\cmd{(pkg, msg1, msg2)} throw a package warning\\
\llcmd{pkgerror}\cmd{(pkg, msg1, msg2, stop)} throw a package error. If stop is true, immediately ceases compile.\\
\\
\llcmd{defcmd}\cmd{(cs, val)} like \cmd{\gdef}\\
\llcmd{newcmd}\cmd{(cs, val)} like \cmd{\newcommand}\\
\llcmd{renewcmd}\cmd{(cs, val)} like \cmd{\renewcommand}\\
\llcmd{prvcmd}\cmd{(cs, val)} like \cmd{\providecommand}\\
\llcmd{deccmd}\cmd{(cs, dft, overwrite)} declare a command. If \cmd{dft} (default) is \cmd{nil}, \cmd{cs} is set
to a package warning saying \cmd{'cs' was declared and used in document, but never set}. If \cmd{overwrite}
is true, it will overwrite an existing command (using \cmd{defcmd}), otherwise, it will throw error like \cmd{newcmd}.\\
\llcmd{get_ref_info(l)}accesses the \cmd{\r@label} and returns a table\\



\subsubsection*{global extras}
If \cmd{extrasglobals} is used and NOT \cmd{extras}, many additional globals are set for shortcuts\\
All \cmd{pl.tex} modules are made global.\\
\cmd{pl.hasval}, \cmd{pl.COMP}, \cmd{pl.utils.kpairs}, \cmd{pl.utils.npairs} become globals with the function name.\\



\subsection*{Macro helpers}
\cmd{\MakeluastringCommands[def]{spec}} will let \cmd{\plluastring(A|B|C..)} be \cmd{\luastring(N|O|T|F)}
based on the letters that \cmd{spec} is set to (or \cmd{def} if nothing is provided)
This is useful if you want to write a command with flexibility on argument expansion.
The user can specify \cmd{n}, \cmd{o}, \cmd{t}, and \cmd{f} (case insensitve) if they want
no, once, twice, or full expansion.

%   BELOW IS FOR TROUBLESHOOTING ABOVE
%\def\NOTexp{\ONEexp}
%\def\ONEexp{\TWOexp}
%\def\TWOexp{\TREexp}
%\def\TREexp{Fully expanded}
%
%\NewDocumentCommand{\luastringExpTest}{m m}{
%  \MakeluastringCommands{#1}
%  \luadirect{texio.write_nl('VVVVVVVVVVVVVVVVVVVVVVVVVVVVV')}
%  \luadirect{texio.write_nl(\plluastringA{#2}..' | Not')}
%  \luadirect{texio.write_nl(\plluastringB{#2}..' | Once')}
%  \luadirect{texio.write_nl(\plluastringC{#2}..' | Twice')}
%  \luadirect{texio.write_nl(\plluastringD{#2}..' | Full')}
%  \luadirect{texio.write_nl('VVVVVVVVVVVVVVVVVVVVVVVVVVVVV')}
%}
%
%\luastringExpTest{ n o t f }{\NOTexp}




\subsection*{Split stuff}
Splitting text (or a cmd) into oxford comma format via:
\cmd{\splitToComma[expansion level]{text}{text to split on}}:

\begin{LTXexample}

-\splitToComma{  j doe  }{\and}-\\
-\splitToComma{  j doe \and s else  }{\and}-\\
-\splitToComma{  j doe \and s else \and a per }{\and}-\\
-\splitToComma{  j doe \and s else \and a per \and f guy}{\and}-

\def\authors{j doe \and s else \and a per \and f guy}
\splitToComma[o]{\authors}{\and}
\end{LTXexample}

The expansion level is up to two characters, \cmd{n|o|t|f}, to control teh expasion of each argument.

\begin{LTXexample}
spliToItems:
\begin{itemize}
  \splitToItems{kale\and john}{\and}
  \splitToItems{kale -john -someone else}{-}
\end{itemize}
\end{LTXexample}






%  \tblfrkv{tbl_def}{kale=cool,paul=gay,craig=fun}
%  \tblfrkv{tbl}{kale,paul=gay} %[naked_as_value=true]
%
%  \tblget{tbl}{kale}%
%  \tblget{tbl}{paul}%
%  \tblget{tbl}{craig}%
%
%  \tblupd{tbl_def}{tbl}%
%
%  \tblfrkvII{tbl}{kale=cool,paul=gay,craig=fun}{kale=weak,paul=sad}
%  \tblget{tbl}{craig}%
%  \tblget{tbl}{paul}%
%  \tblget{tbl}{kale}%
%
%  \NewDocumentCommand{\THINg}{ O{} m}{%
%    \tblfrkvII{setti}{color=red,size=small}{#1} % make settings and update based on [arg=]
%    {\color{\tblget{setti}{color}}\tblget{setti}{size} #2}
%  }
%
%  \THINg[color=blue,size=tiny]{Kale}
  
\end{document}