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+\documentclass[
+ukenglish,%
+twoside=false,%
+fontsize=10pt,%
+bibliography=totoc,%
+numbers=autoenddot,%
+headings=normalsize,%
+overfullrule,%
+headings=optiontotoc,%
+]
+{scrartcl}
+
+\makeatletter
+\providecommand\@ix{9.6}
+\providecommand\@xi{10.4}
+\providecommand\@xiii{13.15}
+\def\subfootnotesize{%
+ \@setfontsize%
+ \subfootnotesize%
+ {7.6}{8}%
+}
+\def\supernormalsize{%
+ \@setfontsize%
+ \supernormalsize%
+ \@xi{12}%
+}
+\def\subnormalsize{%
+ \@setfontsize%
+ \subnormalsize%
+ \@ix{11}%
+}
+\def\sublarge{%
+ \@setfontsize%
+ \sublarge%
+ {11.2}{13}%
+}
+\def\superlarge{%
+ \@setfontsize%
+ \superlarge%
+ \@xiii{16}%
+}
+\makeatother
+
+\newcommand*{\sectionas}{2.3ex plus .2ex}
+\newcommand*{\sectionbs}{-3.5ex plus -1ex minus -.2ex}
+\newcommand*{\sectiontbs}{3.6pt}
+\newcommand*{\subsectiontbs}{1.2pt}
+\newcommand*{\subsectionas}{1.5ex plus .2ex}
+\newcommand*{\subsectionbs}{-3.25ex plus -1ex minus -.2ex}
+\newcommand*{\subsubsectionas}{\subsectionas}
+\newcommand*{\subsubsectionbs}{\subsectionbs}
+\newcommand*{\paragraphas}{-1em}
+\newcommand*{\paragraphbs}{.8\baselineskip}
+
+\newlength{\tnwsection}
+\newlength{\tnwsubsection}
+\newlength{\tnwsubsubsection}
+\newlength{\tnwparagraph}
+\newlength{\tisection}
+\newlength{\tisubsection}
+\newlength{\tisubsubsection}
+\newlength{\tiparagraph}
+
+\setlength{\tnwsection}{1.2em}
+\addtolength{\tnwsection}{.6em}
+\setlength{\tnwsubsection}{\tnwsection}
+\addtolength{\tnwsubsection}{.75em}
+\setlength{\tnwsubsubsection}{\tnwsubsection}
+\addtolength{\tnwsubsubsection}{.75em}
+\setlength{\tnwparagraph}{\tnwsubsubsection}
+\addtolength{\tnwparagraph}{.75em}
+
+\setlength{\tisection}{0em}
+\setlength{\tisubsection}{\tisection}
+\addtolength{\tisubsection}{\tnwsection}
+\setlength{\tisubsubsection}{\tisubsection}
+\addtolength{\tisubsubsection}{\tnwsubsection}
+\setlength{\tiparagraph}{\tisubsubsection}
+\addtolength{\tiparagraph}{\tnwsubsubsection}
+
+\RedeclareSectionCommands[%
+ tocraggedentrytext=true,%
+]%
+{section,subsection,subsubsection,paragraph}
+
+\RedeclareSectionCommand[%
+ tocindent=\tisection,%
+ tocnumwidth=\tnwsection,%
+ tocbeforeskip=\sectiontbs,%
+ tocentryformat=\supernormalsize\sffamily\bfseries,%
+ tocentrynumberformat=\supernormalsize\sffamily\bfseries,%
+ tocpagenumberformat=\supernormalsize\sffamily\bfseries%
+]%
+{section}
+
+\RedeclareSectionCommand[%
+ tocindent=\tisubsection,%
+ tocnumwidth=\tnwsubsection,%
+ tocbeforeskip=\subsectiontbs,%
+ tocentryformat=\subnormalsize,%
+ tocentrynumberformat=\subnormalsize,%
+ tocpagenumberformat=\subnormalsize%
+]%
+{subsection}
+
+\RedeclareSectionCommand[%
+ tocindent=\tisubsubsection,%
+ tocnumwidth=\tnwsubsubsection,%
+ tocbeforeskip=\sectiontbs%
+]%
+{subsubsection}
+
+\RedeclareSectionCommand[%
+ afterskip=\paragraphas,%
+ beforeskip=\paragraphbs,%
+ tocindent=\tiparagraph,%
+ tocnumwidth=\tnwparagraph,%
+ tocbeforeskip=\sectiontbs%
+]%
+{paragraph}
+
+\linespread{1.1}
+
+\newcommand*{\hs}{\hspace{.45em}}
+
+\usepackage{fontspec}
+
+\directlua{
+
+ fonts.handlers.otf.addfeature {
+ name = "onumkern",
+ type = "kern",
+ data = {
+ ["v"] = { ["zero.taboldstyle"] = 80 },
+ ["two.taboldstyle"] = { ["zero.taboldstyle"] = 30, ["/"] = 50 },
+ ["five.taboldstyle"] = { ["/"] = 20 },
+ ["»"] = { ["I"] = 50 },
+ },
+ }
+
+}
+
+\setmainfont{Tangent}[
+ BoldFont = *-Medium,
+ ItalicFont = *-Italic,
+ Ligatures = {Common, TeX},
+ Numbers = OldStyle,
+ RawFeature = +onumkern
+]
+
+\setsansfont{SegoeUI}[
+ BoldFont = seguisb.ttf,
+ Ligatures = {Discretionary, TeX},
+ Numbers = OldStyle
+]
+
+\setmonofont{Consolas}[
+ ItalicFont = *-Italic,
+ Numbers = OldStyle
+]
+
+\newcommand*{\mono}[1]{%
+ {\subnormalsize\texttt{#1}}%
+}
+
+\usepackage{babel}
+\usepackage[paper=a4paper,marginratio={2:1,3:4}]{geometry}
+\usepackage{spacekern}
+\usepackage{hyperref}
+\usepackage{bookmark}
+\usepackage{microtype}
+
+\hypersetup{%
+ pdflang=en,%
+ unicode=true,%
+ pdfborder={0 0 0},%
+ bookmarksopen=true,%
+ bookmarksopenlevel=0,%
+ bookmarksnumbered=true,%
+ pdftitle={The spacekern package},
+ pdfsubject={Kerning between words and against space},
+ pdfauthor={Thomas Kelkel},
+ pdfkeywords={tex, latex, kerning}
+}
+
+\setlength{\parindent}{0pt}
+\setlength{\parskip}{.4\baselineskip}
+
+\newcommand*{\q}[1]{%
+ ›%
+ #1%
+ ‹%
+}
+\newcommand*{\qq}[1]{%
+ »%
+ #1%
+ «%
+}
+
+\newcommand*{\textnote}[1]{%
+ {%
+ \ttfamily%
+ \char174{}%
+ #1%
+ \char174{}%
+ }%
+}
+
+\usepackage{luacode}
+
+\begin{luacode}
+
+local FLOOR = math.floor
+
+local function round ( num, dec )
+ return FLOOR ( num * 10^dec + 0.5 ) / 10^dec
+end
+
+local p_array = {false, false, false, false, false}
+local p_counter = 0
+local ID = node.id
+local NEW = node.new
+local COPY = node.copy
+local REM = node.remove
+local PREV = node.prev
+local NEXT = node.next
+local TAIL = node.tail
+local T_ID = node.traverse_id
+local T_GLYPH = node.traverse_glyph
+local INS_B = node.insert_before
+local GLYPH = ID ( "glyph" )
+local GLUE = ID ( "glue" )
+local KERN = ID ( "kern" )
+local HLIST = ID ( "hlist" )
+local SWAPPED = table.swapped
+local SUBTYPES = node.subtypes
+local SPACESKIP = SWAPPED ( SUBTYPES ("glue") )["spaceskip"]
+local WIDTH = round ( tex.sp ( "1.6em" ), 0 )
+local ipairs = ipairs
+local page_counter = 0
+local INS_A = node.insert_after
+local p_counter_x = 0
+local ATC = luatexbase.add_to_callback
+
+local function make_marks ( head, char, id, array, counter )
+ for n in T_GLYPH ( head ) do
+ if n.char == char then
+ counter = counter + 1
+ array[counter] = {false, false, false}
+ head = INS_B ( head, n, NEW ( GLYPH ) )
+ PREV ( n ).data = id
+ local NEXT = n.next
+ local inside_counter = 0
+ while NEXT.char ~= char do
+ inside_counter = inside_counter + 1
+ array[counter][inside_counter] = COPY ( NEXT )
+ NEXT = NEXT.next
+ REM ( head, NEXT.prev )
+ end
+ head = REM ( head, NEXT )
+ head = REM ( head, n )
+ end
+ end
+ return head, array, counter
+end
+
+local function mark_notes ( head )
+ head, p_array, p_counter = make_marks ( head, 174, 427956, p_array, p_counter )
+ return head
+end
+
+local function make_margin_notes ( head, id, array, counter )
+ for n in T_ID ( HLIST, head ) do
+ local first_kern = 0
+ local first_width = 0
+ for glyph_node in T_GLYPH ( n.head ) do
+ if glyph_node.data == id then
+ counter = counter + 1
+ local tail_node = TAIL ( n.head )
+ local glue_node = NEW ( GLUE )
+ glue_node.subtype = SPACESKIP
+ glue_node.width = WIDTH
+ local NEXT
+ local switch_counter = 1 -- page_counter
+ n.head = INS_A ( n.head, TAIL ( n.head ), glue_node )
+ if ( switch_counter % 2 == 0 ) then
+ NEXT = glue_node
+ else
+ NEXT = tail_node
+ end
+ local kern_value = 0
+ for _, value in ipairs ( array[counter] ) do
+ if value ~= false then
+ local NUMBER = COPY ( value )
+ n.head = INS_A ( n.head, NEXT, NUMBER)
+ if NEXT.next then
+ NEXT = NEXT.next
+ end
+ if NUMBER.width then
+ kern_value = kern_value - NUMBER.width
+ end
+ end
+ end
+ local kern_node = NEW ( KERN )
+ kern_node.kern = kern_value - glue_node.width
+ if switch_counter % 2 ~= 0 then
+ kern_node.kern = kern_node.kern - tex.hsize + first_kern
+ n.head = INS_A ( n.head, tail_node, kern_node )
+ end
+ if ( switch_counter % 2 == 0 ) and ( first_kern < 0 ) then
+ kern_node.kern = kern_node.kern - first_kern + first_width - kern_value
+ n.head = INS_A ( n.head, tail_node, kern_node )
+ end
+ first_kern = kern_node.kern
+ first_width = kern_value
+ end
+ end
+ end
+ return head, counter
+end
+
+local function make_text_notes ( head )
+ page_counter = page_counter + 1
+ head, p_counter_x = make_margin_notes ( head, 427956, p_array, p_counter_x )
+ return head
+end
+
+ ATC ( "ligaturing", mark_notes , "mark notes" )
+ ATC ( "pre_output_filter", make_text_notes , "count pages" )
+
+\end{luacode}
+
+\flushbottom
+
+\RedeclareSectionCommand[%
+ afterskip=1.3ex plus .2ex,%
+ beforeskip=-2.5ex plus -1ex minus -.2ex,%
+ font=\superlarge%
+]%
+{section}
+
+\begin{document}
+
+\title{The spacekern package\vspace{.25\baselineskip}\\\superlarge{}Kerning between words and against space}%
+\author{\sublarge{}Thomas Kelkel\vspace{-.25\baselineskip}\\\sublarge{}kelkel@emaileon.de\vspace{-.25\baselineskip}}%
+\date{\addfontfeature{LetterSpace=2}\sublarge{}2022/06/11\quad{}v0.1a}%
+\maketitle
+
+\section{Introduction}
+
+For typesetting a short space, \LaTeX{} provides the \mono{\textbackslash{},} macro. However, there are several issues with it. First, the following word is not hyphenated. Furthermore, kerning against space is not applied. And finally, the inserted space is non-breaking, which may not be desirable in many cases.
+
+For this reason, the \mono{spacekern} package provides shorthands for typesetting breaking and non-breaking short spaces where both hyphenation and kerning against space are correctly applied. By default, the \mono{\textbackslash{},} macro is redefined accordingly.
+
+The other main feature of this package is the application of interword kerning.
+
+Please note that this does not necessarily lead to better results in all cases. For example, if kerning against space is defined for a glyph, interword kerning might be superfluous and result in too little spacing. Also, you should be aware that interword kerning regularly deals with glyph combinations that do not occur within words and for which the font therefore does not provide kerning.
+
+\section{Basic usage}
+
+To load the package, simply add the following line to the preamble of the document:
+
+\begin{quote}
+ \mono{\textbackslash{}usepackage\{spacekern\}}
+\end{quote}
+
+\section{Package options}
+
+Options can be loaded by adding them comma separated within square brackets:
+
+\begin{quote}
+ \mono{\textbackslash{}usepackage[\textit{<option1>,<option2>,…}]\{spacekern\}}
+\end{quote}
+
+\addcontentsline{toc}{subsection}{noiwkern}
+
+\textnote{noiwkern}By default, interword kerning is applied. This option disables it.
+
+\addcontentsline{toc}{subsection}{noredef}
+
+\textnote{noredef}Disables the redefinition of \mono{\textbackslash{},}.
+
+\section{Shorthands and Macros}
+
+\addcontentsline{toc}{subsection}{;;}
+
+\textnote{\semicolon\semicolon}Typesets a small breaking space.
+
+\addcontentsline{toc}{subsection}{;;;}
+
+\textnote{\semicolon\semicolon\semicolon}Typesets a small non-breaking space.
+
+\addcontentsline{toc}{subsection}{semicolon}
+
+\textnote{\textbackslash{}semicolon}This macro allows the user to typeset consecutive semicolons.
+
+\section{License}
+
+This package is copyright © 2022 Thomas Kelkel. It may be distributed and/or modified under the conditions of the LaTeX Project Public License, either version 1.3c of this license or (at your option) any later version. This work has the LPPL maintenance status \qq{author maintained}.
+
+\end{document} \ No newline at end of file