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authorKarl Berry <karl@freefriends.org>2013-02-13 23:22:28 +0000
committerKarl Berry <karl@freefriends.org>2013-02-13 23:22:28 +0000
commit469e41303044d048cec1de7cf5d814b9f2b5e52e (patch)
tree6c5aefbb73aa821e171c8beef63723044c2c5476 /Master/texmf-dist/doc/luatex/spelling
parenta19e8fc23c74d8bb5f11c0fb7c135ab7e108c36a (diff)
spelling (13feb13)
git-svn-id: svn://tug.org/texlive/trunk@29102 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/doc/luatex/spelling')
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/CHANGES47
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/LICENSE416
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/README69
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/spelling-doc.bad6
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/spelling-doc.pdfbin0 -> 106933 bytes
-rw-r--r--Master/texmf-dist/doc/luatex/spelling/spelling-doc.tex690
6 files changed, 1228 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/luatex/spelling/CHANGES b/Master/texmf-dist/doc/luatex/spelling/CHANGES
new file mode 100644
index 00000000000..24dd549ca4b
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/CHANGES
@@ -0,0 +1,47 @@
+This material is subject to the LaTeX Project Public License. See
+<http://www.latex-project.org/lppl/> for the details of that license.
+
+
+### v0.3 (2013-02-12)
+
+New:
+
+ * [LanguageTool][lt] support: LanguageTool error reports in the XML
+ format can be parsed for spelling errors (with the help of the
+ [LuaXML][luaxml] package). LanguageTool is a cross-platform style
+ and grammar checker.
+
+[lt]: http://www.languagetool.org/
+[luaxml]: http://www.ctan.org/pkg/luaxml
+
+Changes:
+
+ * Default file names used by the package have been changed:
+
+ <jobname>.spb => <jobname>.spell.bad
+ <jobname>.spg => <jobname>.spell.good
+ <jobname>.txt => <jobname>.spell.txt
+
+
+### v0.2 (2012-12-04)
+
+Fixes:
+
+ * File `spelling.lua` could not be found by LaTeX style file
+ ([GitHub issue 14][#14]).
+
+[#14]: https://github.com/sh2d/spelling/issues/14
+
+
+### v0.1 (2012-11-30)
+
+First upload to CTAN.
+
+
+
+<!--
+%%% Local Variables:
+%%% coding: utf-8
+%%% mode: markdown
+%%% End:
+-->
diff --git a/Master/texmf-dist/doc/luatex/spelling/LICENSE b/Master/texmf-dist/doc/luatex/spelling/LICENSE
new file mode 100644
index 00000000000..22443139013
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/LICENSE
@@ -0,0 +1,416 @@
+The LaTeX Project Public License
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+LPPL Version 1.3c 2008-05-04
+
+Copyright 1999 2002-2008 LaTeX3 Project
+ Everyone is allowed to distribute verbatim copies of this
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+
+
+PREAMBLE
+========
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diff --git a/Master/texmf-dist/doc/luatex/spelling/README b/Master/texmf-dist/doc/luatex/spelling/README
new file mode 100644
index 00000000000..6489095d30c
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/README
@@ -0,0 +1,69 @@
+This material is subject to the LaTeX Project Public License. See
+<http://www.latex-project.org/lppl/> for the details of that license.
+
+
+
+### Package information
+
+Package name: spelling
+Summary description: Aid spell-checking LuaTeX documents.
+Version: v0.3
+Date: 2013-02-12
+License: [LPPL v1.3c](http://www.latex-project.org/lppl/lppl-1-3c.html)
+Maintenance status: maintained
+Current maintainer: Stephan Hennig, <sh2d@arcor.de>
+
+
+
+### Description
+
+This package aids spell-checking of TeX documents compiled with the
+LuaTeX engine. It can give visual feedback in PDF output similar to
+WYSIWYG word processors. The package relies on an external
+spell-checker application to check spelling of a text file and to output
+a list of bad spellings. The package should work with most
+spell-checkers, even dumb, TeX-unaware ones.
+
+
+
+### Development
+
+The development repository is currently hosted at
+[GitHub](https://github.com/sh2d/spelling/). Code documentation is in
+[LuaDoc](http://keplerproject.github.com/luadoc/) format and can be
+generated via
+
+ luadoc -d API *.lua
+
+Bugs and a wish list can be found in the
+[issue tracker](https://github.com/sh2d/spelling/issues/).
+Contributions of any kind are warmly welcome!
+
+
+_Happy TeXing!_
+
+
+
+### File list
+
+ CHANGES
+ LICENSE
+ README
+ spelling.lua
+ spelling.sty
+ spelling-doc.bad
+ spelling-doc.tex
+ spelling-recurse.lua
+ spelling-stage-1.lua
+ spelling-stage-2.lua
+ spelling-stage-3.lua
+ spelling-stage-4.lua
+
+
+
+<!--
+%%% Local Variables:
+%%% coding: utf-8
+%%% mode: markdown
+%%% End:
+-->
diff --git a/Master/texmf-dist/doc/luatex/spelling/spelling-doc.bad b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.bad
new file mode 100644
index 00000000000..c5cc1638119
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.bad
@@ -0,0 +1,6 @@
+Ther
+fotenoot
+misspelllings
+spellling
+foo’s
+incorect
diff --git a/Master/texmf-dist/doc/luatex/spelling/spelling-doc.pdf b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.pdf
new file mode 100644
index 00000000000..c1cacbf3c7f
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.pdf
Binary files differ
diff --git a/Master/texmf-dist/doc/luatex/spelling/spelling-doc.tex b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.tex
new file mode 100644
index 00000000000..7a0c1bf3af6
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/spelling/spelling-doc.tex
@@ -0,0 +1,690 @@
+%%% spelling-doc.sty
+%%% Copyright 2012, 2013 Stephan Hennig
+%%
+%% This work may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License, either version 1.3 of this license
+%% or (at your option) any later version. The latest version of this
+%% license is in http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% See file README for more information.
+%%
+\documentclass[11pt]{article}
+\usepackage{fontspec}
+\defaultfontfeatures{Ligatures=TeX}
+\usepackage{multicol}
+\usepackage{listings}
+\lstset{
+ basicstyle=\ttfamily,
+ columns=spaceflexible,
+}
+% Short-cut for non-language code snippets.
+\lstMakeShortInline\|
+% Short-cut for LaTeX code snippets.
+\lstMakeShortInline[
+language={[LaTeX]TeX},
+basicstyle=\ttfamily,
+]°
+\usepackage{xspace}
+\usepackage{array}
+\usepackage{booktabs}
+\usepackage[latin, UKenglish]{babel}
+\usepackage[rgb, x11names]{xcolor}
+\usepackage{hyperref}
+\hypersetup{
+ pdftitle={spelling},
+ pdfauthor={Stephan Hennig},
+ pdfkeywords={spell-checking, spelling, TeX, LuaTeX}
+}
+\hypersetup{
+ english,% For \autoref.
+ pdfstartview={XYZ null null null},% Zoom factor is determined by viewer.
+ colorlinks,
+ linkcolor=RoyalBlue3,
+ urlcolor=Chocolate4,
+ citecolor=DeepPink2
+}
+\usepackage{spelling}
+\spellingreadbad{\jobname.bad}
+\newcommand*{\pkg}{\textsf{spelling}}
+\newcommand*{\acr}[1]{\mbox{\scshape#1}}
+\newcommand*{\descr}[1]{〈\emph{#1}〉}
+\newcommand*{\cmd}[1]{\mbox{\ttfamily\textbackslash#1}}
+\newcommand*{\macro}[1]{\cmd{#1}\marginpar{\cmd{#1}}}
+\newcommand*{\latinphrase}[1]{\foreignlanguage{latin}{\emph{#1}}}
+\newcommand*{\lpcf}{\latinphrase{cf.}\xspace}
+\newcommand*{\lpeg}{\latinphrase{e.\,g.}\xspace}
+\newcommand*{\lpetc}{\latinphrase{etc.}\xspace}
+\newcommand*{\lpie}{\latinphrase{i.\,e.}\xspace}
+\begin{document}
+\author{Stephan Hennig\thanks{sh2d@arcor.de}}
+\title{\pkg\thanks{This document describes the \pkg\ package v0.3.}}
+\maketitle
+
+
+\begin{abstract}
+ This package aids spell-checking of \TeX\ documents compiled with the
+ Lua\TeX\ engine. It can give visual feedback in \acr{pdf} output
+ similar to \acr{wysiwyg} word processors. The package relies on an
+ external spell-checker application to check spelling of a text file
+ and to output a list of bad spellings. The package should work with
+ most spell-checkers, even dumb, \TeX-unaware ones.
+
+ \emph{Warning! This package is in a very early state. Everything may
+ change!}
+\end{abstract}
+
+\begin{multicols}{2}
+\small
+% Set toc entries ragged right. Trick taken from tocloft.pdf.
+\makeatletter
+\renewcommand{\@tocrmarg}{2.55em plus1fil}
+\makeatother
+\tableofcontents
+\end{multicols}
+
+
+\section{Introduction}
+\label{sec:intro}
+
+Ther%
+\footnote{A fotenoot containing misspelllings. But note how
+ `misspelllings' currently slips through due to punctuation. Some
+ annoying bugs are listed in \autoref{sec:bugs}.}
+%
+are three main approaches to spell-checking \TeX\ documents:
+
+\begin{enumerate}
+
+\item checking spelling in the |.tex| source file,
+
+\item converting a |.tex| file to another format, for which a proved
+ spell-checking solution exists,
+
+\item checking spelling after a |.tex| file has been processed by \TeX.
+
+\end{enumerate}
+
+All of these approaches have their strengths and weaknesses. This
+package follows the third approach, providing some unique features:
+
+\begin{itemize}
+
+\item In traditional solutions, text is extracted from typeset
+ \acr{dvi}, \acr{ps} or \acr{pdf} files, including hyphenated words.
+ Therefore, to avoid lots of false positives being reported by the
+ spell-checker, hyphenation has to be switched off during the \TeX\
+ run. So, one doesn't work on the original document any more.
+
+ In contrast to that, the \pkg\ package works transparently on the
+ original |.tex| source file. Text is extracted \emph{during}
+ typesetting, after Lua\TeX\ has applied its catcode and macro
+ machinery, but before hyphenation takes place.
+
+\item The \pkg\ package can highlight words with known incorrect
+ spelling in \acr{pdf} output, giving visual feedback similar to
+ \acr{wysiwyg} word processors.%
+ \footnote{Currently, only colouring words is implemented.}
+
+\end{itemize}
+
+
+\section{Usage}
+\label{sec:usage}
+
+The \pkg\ package requires the Lua\TeX\ engine. All functionality of
+the package is implemented in Lua. The \LaTeX\ interface, which is
+described below, is effectively a wrapper around the Lua interface.
+
+\emph{Implementing such wrappers for other formats shouldn't be too
+ difficult. The author is a \LaTeX-only user, though, and therefore
+ grateful for contributions. By the way, the \LaTeX\ package needs
+ some polishing, too, \lpeg, a key-value interface is desirable.}
+
+
+\subsection{Work-flow}
+\label{sec:work-flow}
+
+The work-flow of the \pkg\ package is as follows:
+
+\begin{enumerate}
+
+\item After the package is loaded in the preamble of a |.tex| source
+ file via °\usepackage{spelling}°, a list of bad spellings is read from
+ a file named \descr{jobname}|.spell.bad|, if that file exists.
+
+\item During the Lua\TeX\ run, text is extracted from pages and all
+ words are checked against the list of bad spellings. Words with a
+ known incorrect spelling are highlighted in \acr{pdf} output.
+
+\item At the end of the Lua\TeX\ run, in addition to the \acr{pdf} file,
+ a text file is written, named \descr{jobname}|.spell.txt|, by default.
+ The text file should contain most of the text of the original
+ document.
+
+\item The text file is then checked by your favourite spell-checker
+ application, \lpeg, Aspell or Hunspell. The spell-checker should be
+ able to write a list of bad spellings to a file. Otherwise, visual
+ feedback in \acr{pdf} output won't work. Preferably, the file is
+ named \descr{jobname}|.spell.bad|, but any other file name works just
+ as well.
+
+\item Now, there are two ways to proceed:
+
+ \begin{enumerate}
+
+ \item Visually minded people may just compile their document a second
+ time. This time, file \descr{jobname}|.spell.bad| is read-in again
+ and the words with incorrect spelling found by the spell-checker
+ should now be highlighted in \acr{pdf} output. Checking the
+ \acr{pdf} file, the necessary corrections to the |.tex| source file
+ can be applied.
+
+ \item If you're not interested in visual feedback or if your
+ spell-checker doesn't provide a non-interactive mode, you can as
+ well apply the necessary corrections directly to the |.tex| source
+ file(s), either interactively, during the spell-checker run, or by
+ looking at the final list of bad spellings in an editor (whatever
+ file it was saved to). That way, the benefit of this package is,
+ that spell-checker input has already been processed by Lua\TeX, but
+ contains no hyphenated words.
+
+ \end{enumerate}
+
+\end{enumerate}
+
+
+\subsection{Word lists}
+\label{sec:wordlists}
+
+As described above, if a file \descr{jobname}|.spell.bad| exists, it is
+loaded by the \pkg\ package. The words found in the file are stored in
+an internal list of bad spellings and are later used for highlighting
+spelling mistakes in \acr{pdf} output.
+
+Additionally, a second file \descr{jobname}|.spell.good| is read, if
+that file exists. The words found in that file are stored in an
+internal list of good spellings. Words in the list of good spellings
+are never highlighted in \acr{pdf} output. That is, words in the
+Lua\TeX\ document are only considered spelling mistakes if they occur in
+the list of bad spellings, but not in the list of good spellings. The
+list of good spellings can be used to deal with false positives (words
+incorrectly reported as bad spellings by the spell-checker).
+
+Words from additional files can be appended to the internal lists of bad
+and good spellings with the \macro{spellingreadbad} and
+\macro{spellingreadgood} commands. Argument to both macros is a file
+name. File format is one word per line. Letter case is significant.
+The file must be in the \acr{utf-8} encoding. As an example, the
+command
+
+\begin{lstlisting}[language={[LaTeX]TeX}]
+\spellingreadgood{myproject.whitelist}
+\end{lstlisting}
+%
+reads words from a file |myproject.whitelist| and adds them to the list
+of good spellings. Note, most spell-checkers provide means to deal with
+unknown words via additional dictionaries. It is recommended to
+configure your spell-checker to report as few false positives as
+possible.
+
+
+\subsection{Highlighting spellling mistakes}
+\label{sec:highlight}
+
+\paragraph{Enabling/disabling} Highlighting spelling mistakes (words
+with known incorrect spelling) in \acr{pdf} output can be toggled on and
+off with command \macro{spellinghighlight}. If the argument is |on|,
+highlighting is enabled. For other arguments, highlighting is disabled.
+Highlighting is enabled, by default.
+
+\paragraph{Colour} The colour used for highlighting bad spellings can be
+determined by command \cmd{spellinghighlightcolor}. Argument is a
+colour statement in the \acr{pdf} language. As an example, the colour
+red in the \acr{rgb} colour space is represented by the statement %
+|1 0 0 rg|. In the \acr{cmyk} colour space, a reddish colour is
+represented by |0 1 1 0 k|. Default colour used for highlighting is %
+|1 0 0 rg|, \lpie, red in the \acr{rgb} colour space. \emph{Warning:
+ There's currently no error checking. Make sure, you're applying a
+ valid PDF colour statement!}
+
+
+\subsection{Text output}
+\label{sec:textoutput}
+
+\paragraph{Text file} After loading the \pkg\ package, at the end of the
+Lua\TeX\ run, a text file is written that contains most of the document
+text. The text file is no close text rendering of the typeset document,
+but serves as input for your favourite spell-checker application. It
+contains the document text in a simple format: paragraphs separated by
+blank lines. A paragraph is anything that, during typesetting, starts
+with a |local_par| whatsit node in the node list representing a typeset
+page of the original document, \lpeg, paragraphs in running text,
+footnotes, marginal notes, (in-lined) °\parbox° commands or cells from
+°p°-like table columns \lpetc
+
+Paragraphs consist of words separated by spaces. A word is the textual
+representation of a chain of consecutive nodes of type |glyph|, |disc|
+or |kern|. Boxes are processed transparently. That is, the \pkg\
+package (highly imperfectly) tries to recognise as a single word what in
+typeset output looks like a single word. As an example, the \LaTeX\
+code
+
+\begin{center}
+ \begin{tabular}{c}
+\begin{lstlisting}[language={[LaTeX]TeX}]
+foo\mbox{'s bar}s
+\end{lstlisting}
+ \end{tabular}
+\end{center}
+which is typeset as
+
+\begin{center}
+ foo\mbox{'s bar}s
+\end{center}
+is considered two words \textit{foo's} and \textit{bars}, instead of the
+four words \textit{foo}, \textit{'s}, \textit{bar} and~\textit{s}.%
+\footnote{This document has been compiled with a custom list of bad
+ spellings, which is why the word \emph{foo's} should be highlighted.}
+
+\paragraph{Enabling/disabling} Text output can be toggled on and off
+with command \macro{spellingoutput}. If the argument is |on|, text
+output is enabled. For other arguments, text output is disabled. Text
+output is enabled, by default.
+
+\paragraph{File name} \hspace{0pt plus 5em} Text output file name can be
+configured via command \macro{spellingoutputname}. Argument is the new
+file name. Default text output file name is
+\descr{jobname}|.spell.txt|.
+
+\paragraph{Line length} In text output, paragraphs can either be put on
+a single line or broken into lines of a fixed length. The behaviour can
+be controlled via command \macro{spellingoutputlinelength}. Argument is
+a number. If the number is~0 or less, paragraphs are put on a single
+line. For larger arguments, the number specifies the maximum line
+length. Note, lines are broken at spaces only. Words longer than
+maximum line length are put on a single line exceeding maximum line
+length. Default line length is~72.
+
+\paragraph{Line ending convention} The end-of-line (\acr{eol}) character
+in text output can be configured via command \macro{spellingoutputeol}.
+Argument is an arbitrary sequence of characters in the \acr{utf-8}
+encoding.
+
+Well, things are a bit more complicated, because in Lua\TeX, as in the
+original \TeX, some characters are treated special. To keep Lua\TeX\
+from messing with our \acr{eol} characters in the input, we need to set
+their category codes accordingly. As an example, to set \acr{eol}
+character to follow \acr{dos} line ending convention (carriage return
+followed by line feed, \TeX\ notation |^^M^^J|), the following code can
+be used:
+
+\begin{lstlisting}[language={[LaTeX]TeX}]
+\begingroup
+\catcode`\^^J=12% make line feed and carriage return
+\catcode`\^^M=12% of category Other
+\spellingoutputeol{^^M^^J}
+\endgroup
+\end{lstlisting}
+%
+For the \acr{unix} line ending convention (a single line feed), just
+leave out |^^M| in the argument to |\spellingoutputeol|.
+
+Default line ending convention depends on the operating system
+determined by Lua\TeX. If |os.type| is either |windows| or |msdos|,
+\acr{dos} line ending convention is used. Otherwise \acr{unix} line
+ending convention is used.
+
+
+\subsection{Text extraction}
+\label{sec:textextraction}
+
+\paragraph{Enabling/disabling} Text extraction can be enabled and
+disabled in the document via command \macro{spellingextract}. If the
+argument is |on|, text extraction is enabled. For other arguments, text
+extraction is disabled. The command should be used in vertical mode,
+\lpie, outside paragraphs. If text extraction is disabled in the
+document preamble, an empty text file is written at the end of the
+Lua\TeX\ run. Text extraction is enabled, by default.
+
+Note, text extraction and visual feedback are orthogonal features. That
+is, if text extraction is disabled for part of a document, \lpeg, a long
+table, words with a known incorrect spelling are still highlighted in
+that part.
+
+
+\subsection{Code point mapping}
+\label{sec:cp-mapping}
+
+As explained in \autoref{sec:textoutput}, the text file written at the
+end of the Lua\TeX\ run is in the \acr{utf-8} encoding. Unicode
+contains a wealth of code points with a special meaning, such as
+ligatures, alternative letters, symbols \lpetc Unfortunately, not all
+spell-checker applications are smart enough to correctly interpret all
+Unicode code points that may occur in a document. For that reason, a
+code point mapping feature has been implemented that allows for mapping
+certain Unicode code points that may appear in a node list to arbitrary
+strings in text output. A typical example is to map ligatures to the
+characters corresponding to their constituting letters. The default
+mappings applied can be found in \autoref{tab:cp-mapping}.
+
+\begin{table}
+ \centering
+
+ \begin{tabular}{>{\ttfamily}l>{\ttfamily}l>{\ttfamily}l}
+ \normalfont Unicode name & \normalfont code point & \normalfont target characters\\
+ \addlinespace
+ \toprule
+ \addlinespace
+
+ LATIN CAPITAL LIGATURE IJ & 0x0132 & IJ\\
+ LATIN SMALL LIGATURE IJ & 0x0133 & ij\\
+ LATIN CAPITAL LIGATURE OE & 0x0152 & OE\\
+ LATIN SMALL LIGATURE OE & 0x0153 & oe\\
+ LATIN SMALL LETTER LONG S & 0x017f & s\\
+ LATIN CAPITAL LETTER SHARP S & 0x1e9e & SS\\
+ LATIN SMALL LIGATURE FF & 0xfb00 & ff\\
+ LATIN SMALL LIGATURE FI & 0xfb01 & fi\\
+ LATIN SMALL LIGATURE FL & 0xfb02 & fl\\
+ LATIN SMALL LIGATURE FFI & 0xfb03 & ffi\\
+ LATIN SMALL LIGATURE FFL & 0xfb04 & ffl\\
+ LATIN SMALL LIGATURE LONG S T & 0xfb05 & st\\
+ LATIN SMALL LIGATURE ST & 0xfb06 & st\\
+ \end{tabular}
+
+ \caption{Default code point mappings.}
+ \label{tab:cp-mapping}
+
+\end{table}
+
+Additional mappings can be declared by command \macro{spellingmapping}.
+This command takes two arguments, a number that refers to the Unicode
+code point, and a sequence of arbitrary characters that is the mapping
+target. The code point number must be in a format that can be parsed by
+Lua. The characters must be in the \acr{utf-8} encoding.
+
+New mappings only have effect on the following document text. The
+command should therefore be used in the document preamble. As an
+example, the character |A| can be mapped to |Z| and \latinphrase{vice
+ versa} with the following code:
+
+\begin{lstlisting}[language={[LaTeX]TeX}]
+\spellingmapping{65}{Z}% A => Z
+\spellingmapping{90}{A}% Z => A
+\end{lstlisting}
+
+Another command \macro{spellingclearallmappings} can be used to remove
+all existing code point mappings.
+
+
+\subsection{Tables}
+\label{sec:tables}
+
+How do tables fit into the simple text file format that has only
+paragraphs and blank lines as described in \autoref{sec:textoutput}?
+What is a paragraph with regards to tables? A whole table? A row? A
+single cell?
+
+By default, only text from cells in °p°(aragraph)-like columns is put on
+their own paragraph, because the corresponding node list branches
+contain a |local_par| whatsit node (\lpcf \autoref{sec:textoutput}).
+The behaviour can be changed with the \macro{spellingtablepar} command.
+This command takes as argument a number. If the argument is~0, the
+behaviour is described as above. If the argument is~1, a blank line is
+inserted before and after every table row (but at most once between
+table rows). If the argument is~2, a blank line is inserted before and
+after every table cell. By default, no blank lines are inserted.
+
+
+\section{LanguageTool support}
+\label{sec:languagetool}
+
+Installing spell-checkers and dictionaries can be a difficult task if
+there are no pre-built packages available for an architecture. That's
+one reason the \pkg\ package is rather spell-checker agnostic and the
+manual doesn't recommend a particular spell-checker application.
+Another reason is, there's no best spell-checker. The only
+recommendation the author makes is not to trust in one spell-checker,
+but to use multiple spell-checkers at the same time, with different
+dictionaries or, better yet, different checking engines under the hood.
+
+Among the set of options available, LanguageTool, a style and grammar
+checker%
+\footnote{\url{http://www.languagetool.org/}}
+%
+that can also check spelling since version~1.8, deserves some notice for
+its portability, ease of installation and active development. For these
+reasons, the \pkg\ package provides explicit LanguageTool support.
+LanguageTool uses Hunspell as the spell-checking engine, augmenting
+results with a rule based engine and a morphological analyser (depending
+on the language). The \pkg\ package can parse LanguageTool's error
+reports in the \acr{xml} format, pick those errors that are spelling
+related and use them to highlight bad spellings.%
+\footnote{Support for style and grammar errors found by LanguageTool
+ should be possible, but requires major restructuring of the \pkg\
+ package that won't happen any time soon.}
+
+
+\subsection{Installation}
+\label{sec:lt-installation}
+
+Here are some brief installation instructions for the stand-alone
+version of LanguageTool (tested with LanguageTool~2.0). The stand-alone
+version contains a \acr{gui} as well as a command-line interface. For
+the \pkg\ package, the latter is needed.
+
+\begin{enumerate}
+
+\item LanguageTool is primarily written in Java. Make sure a recent
+ Java Runtime Environment (\acr{jre}) is installed.
+
+\item\label{enum:run-java} Open a command-line and type
+
+\begin{lstlisting}
+java -version
+\end{lstlisting}
+%
+ If you get an error message, find out the full path to the Java
+ executable (called |java.exe| on Windows) for later reference.
+
+\item Download the stand-alone version of LanguageTool (should be a
+ \acr{zip} archive).
+
+\item Uncompress the downloaded archive to a location of your choice.
+
+\item Open a command-line in the directory containing file
+ |LanguageTool.jar| and type
+
+\begin{lstlisting}[escapeinside=°°]
+°\descr{path to}°/java -jar LanguageTool.jar --help
+\end{lstlisting}
+%
+ Prepending the path to the Java executable is optional, depending on
+ the result in step~\ref{enum:run-java}. If you now see a list of
+ LanguageTool's command-line options rush by, all is well.
+
+\item For easier access to LanguageTool, create a small batch script and
+ put that somewhere into the |PATH|.
+
+ \begin{itemize}
+
+ \item For users of Unixoid systems, the script might look like
+
+\begin{lstlisting}[escapeinside=°°]
+#!/bin/sh
+°\descr{path to}°/java -jar °\descr{path to}°/LanguageTool.jar $*
+\end{lstlisting}
+%
+ where \texttt{\descr{path to}} should point to the Java executable
+ (optional) and file |LanguageTool.jar| (mandatory). If the script
+ is named |lt.sh|, you should be able to run LanguageTool on the
+ command shell by typing, \lpeg,
+
+\begin{lstlisting}
+sh lt.sh --version
+\end{lstlisting}
+%
+ Don't forget to put the script into the |PATH|! For other ways of
+ making scripts executable, please consult the operating system
+ documentation.
+
+ \item For Windows users, the script might look like
+
+\begin{lstlisting}[escapeinside=°°]
+@echo off
+°\descr{path to}°\java -jar °\descr{path to}°\LanguageTool.jar %*
+\end{lstlisting}
+%
+ where \texttt{\descr{path to}} should point to the Java executable
+ (optional) and file |LanguageTool.jar| (mandatory). If the script
+ is named |lt.bat|, you should be able to run LanguageTool on the
+ command-line by typing, \lpeg,
+
+\begin{lstlisting}
+lt --version
+\end{lstlisting}
+%
+ Don't forget to put the script into the |PATH|!
+
+ \end{itemize}
+
+\end{enumerate}
+
+
+\subsection{Usage}
+\label{sec:lt-usage}
+
+The results of checking a text file with LanguageTool are written to an
+error report, either in a human readable format or in a machine friendly
+\acr{xml} format. The \pkg\ package can only parse the latter format.
+When it was said in \autoref{sec:wordlists} that the \pkg\ package reads
+files \descr{jobname}|.spell.bad| and \descr{jobname}|.spell.good|, if
+they exist, that was not the whole truth. Additionally, a file
+\descr{jobname}|.spell.xml| is read, if it exists. This file should
+contain a LanguageTool error report in the \acr{xml} format. Additional
+LanguageTool \acr{xml} error reports can be loaded via the
+\macro{spellingreadLT} command. Argument is a file name. Macros
+|\spellingreadLT|, |\spellingreadbad| and |\spellingreadgood| can be
+used in combination in a \TeX\ file.
+
+To check a text file and create an error report in the \acr{xml} format,
+LanguageTool can be called on the command-line like this
+\begin{lstlisting}[escapeinside=°°]
+lt °\descr{options}° °\descr{input file}° > °\descr{error report}°
+\end{lstlisting}
+where \texttt{\descr{options}} is a list of options described below,
+\texttt{\descr{input file}} is the text file written by the \pkg\
+package in the first Lua\TeX\ run and \texttt{\descr{error report}} is
+the file containing the error report. Note, how standard output is
+redirected to a file via the |>| operator. By default, LanguageTool
+writes error reports to standard output, that is, the command-line.
+Redirection is a feature most operating systems provide.
+
+\begin{itemize}
+
+\item Option |-l| determines the language (variant) of the file to
+ check. As an example, language variant US English can be selected via
+ |-l en-US|. The full list of languages supported by LanguageTool can
+ be requested via option |--list|.
+
+\item Option |-c| determines the encoding of the input file. Since the
+ text file written by the \pkg\ package is in the \acr{utf-8} encoding,
+ this part should be |-c utf-8|.
+
+\item By default, LanguageTool outputs error reports in a human readable
+ format. The \pkg\ package can only parse error reports in the
+ \acr{xml} format. If the |--api| option is present, LanguageTool
+ outputs \acr{xml} data.
+
+\item Users that don't want to highlight bad spellings, but prefer to
+ study the list of bad spellings themselves, should refer to the |-u|
+ option. But note, that with the latter option present, LanguageTool
+ doesn't output pure \acr{xml} any more, even if the |--api| option is
+ present. Make sure such error reports aren't read by the \pkg\
+ package.
+
+\item If the |--help| option is present, LanguageTool shows more
+ information about command-line options.
+
+\end{itemize}
+
+As an example, to compile a \LaTeX\ file |myletter.tex| written in
+French that uses the \pkg\ package with standard settings to highlight
+bad spellings and to use LanguageTool as a spell-checker, the following
+commands should be typed on the command-line:
+
+\begin{lstlisting}
+lualatex myproject
+lt --api -c utf-8 -l fr myletter.spell.txt > myletter.spell.xml
+lualatex myproject
+\end{lstlisting}
+
+
+\section{Bugs}
+\label{sec:bugs}
+
+Note, this package is in a very early state. Expect bugs! Package
+development is hosted at
+\href{http://github.com/sh2d/spelling/}{\bfseries GitHub}. The full
+list of known bugs and feature requests can be found in the
+\href{http://github.com/sh2d/spelling/issues/}{\bfseries issue tracker}.
+New bugs should be reported there.
+
+The most user-visible issues are listed below:
+
+\begin{itemize}
+
+\item There's no support for the Plain \TeX\ or Con\TeX\ formats other
+ than the \acr{API} of the package's Lua modules, yet
+ (\href{https://github.com/sh2d/spelling/issues/1}{issue~1}).
+
+\item Macros provided by the \LaTeX\ package have very long names. A
+ \emph{key-value} package option interface would be much more
+ user-friendly
+ (\href{https://github.com/sh2d/spelling/issues/2}{issue~2}).
+
+\item There are a couple of issues with text extraction and highlighting
+ incorrect spellings:
+
+ \begin{itemize}
+
+ \item Text in head and foot lines is neither extracted nor highlighted
+ (\href{https://github.com/sh2d/spelling/issues/7}{issue~7}).
+
+ \item Punctuation characters are currently not stripped from words.
+ For that reason, misspellings of words with leading or trailing
+ punctuation will currently slip through. This affects at least one
+ word per sentence, the last one
+ (\href{https://github.com/sh2d/spelling/issues/8}{issue~8}).
+
+ \item The first word starting right after an |hlist|, \lpeg, the first
+ word within an |\mbox|, is never highlighted. It is extracted and
+ written to the text file, though. This might affect acronyms, names
+ \lpetc (\href{https://github.com/sh2d/spelling/issues/6}{issue~6}).
+
+ \item Bad spellings that are hyphenated at a page break are not
+ highlighted
+ (\href{https://github.com/sh2d/spelling/issues/10}{issue~10}).
+
+ \end{itemize}
+
+
+\end{itemize}
+
+Any contributions are warmly welcome!
+
+\bigskip
+\emph{Happy \TeX ing!}
+
+
+\end{document}
+
+
+
+%%% Local Variables:
+%%% mode: latex
+%%% TeX-PDF-mode: t
+%%% TeX-master: t
+%%% coding: utf-8
+%%% End: