Text Formatting ⇒ \kern ruins hyphenation

[Laurentius]

The example is self-explanatory. A solution would be wonderful!

Code: Select all

\documentclass{article}
\usepackage{ucharclasses}

\newXeTeXintercharclass \QuotationMarkClass
\XeTeXcharclass `` = \QuotationMarkClass
\XeTeXcharclass `' = \QuotationMarkClass

\XeTeXinterchartoks \QuotationMarkClass \BasicLatinClass {\kern 1pt}
\XeTeXinterchartoks \BasicLatinClass \QuotationMarkClass {\kern 1pt}

\hyphenation{hair-space}

\begin{document}

\XeTeXinterchartokenstate=0

Between quotation marks and the quoted text there must needs be a `hairspace'.
But using character classes to insert one ruins hyphenation.

\XeTeXinterchartokenstate=1

Between quotation marks and the quoted text there must needs be a `hairspace'.
But using character classes to insert one ruins hyphenation.

\end{document}

[cgnieder]

the same happens when you add the kern manually:

Code: Select all

\documentclass{article}
\hyphenation{hair-space}

\begin{document}

Between quotation marks and the quoted text there must needs be a `hairspace'.
But using character classes to insert one ruins hyphenation.

Between quotation marks and the quoted text there must needs be a `\kern1pt
hairspace\kern1pt'\kern1pt.  But using character classes to insert one ruins
hyphenation.

\end{document}

If you use \hspace or \hskip instead hyphenation is allowed again:

Code: Select all

% arara: xelatex
\documentclass{article}
\usepackage{ucharclasses}

\newXeTeXintercharclass \QuotationMarkClass
\XeTeXcharclass `` = \QuotationMarkClass
\XeTeXcharclass `' = \QuotationMarkClass

\XeTeXinterchartoks \QuotationMarkClass \BasicLatinClass {\hskip1pt\relax}
\XeTeXinterchartoks \BasicLatinClass \QuotationMarkClass {\hskip1pt\relax}

\hyphenation{hair-space}

\begin{document}

\XeTeXinterchartokenstate=0

Between quotation marks and the quoted text there must needs be a `hairspace'.
But using character classes to insert one ruins hyphenation.

\XeTeXinterchartokenstate=1

Between quotation marks and the quoted text there must needs be a `hairspace'.
But using character classes to insert one ruins hyphenation.

\end{document}

Regards

[cgnieder]

Better:

Code: Select all

\XeTeXinterchartoks \QuotationMarkClass \BasicLatinClass {\nobreak\hskip1pt\relax}
\XeTeXinterchartoks \BasicLatinClass \QuotationMarkClass {\nobreak\hskip1pt\relax}

While \kern does not insert a valid break point \hskip does. So you need to disallow breaking there manually.

Regards

[Laurentius]

Thanks. (I eventually did the unnecessarily clever {{\spaceskip=1pt~}}.)

Out of curiosity, do you know why `normal' quotation marks cause no hyphenation problems?

[cgnieder]

Out of curiosity, do you know why `normal' quotation marks cause no hyphenation problems?

I don't understand: why should they? Other punctuation doesn't cause problems either. The problem was the explicit kern.

Regards

[Laurentius]

I meant to ask the cause not the reason. But it's not important.