[tex-hyphen] Puzzling hyphenation with polyglossia and xelatex

[Dominik Wujastyk]

I'm sorry not to have a minimal example for this query.  But I'm getting
different hyphenation results depending on the order of language/font
invocation.


Thus, if I say

\usepackage{polyglossia}

\usepackage{xltxtra}

\defaultfontfeatures{Mapping=tex-text,Numbers=OldStyle}
\setmainfont{TeX Gyre Pagella}

\setdefaultlanguage[variant=british]{english}

\setotherlanguage{sanskrit} % for transliterated Sanskrit

\newfontfamily\sanskritfont %[Script=Devanagari]

{TeX Gyre Pagella}

%

% Define \sansk{} which is the same as \emph{}, except that it causes
appropriate
% hyphenation for Sanskrit words.

% Use \sansk{} for Sanskrit and \emph{} for English.
\newcommand{\sansk}[1]{\emph{#1}}

then I get some very wrong hyphenations in the English text.  For example,
s-moothly, and other cases with one letter at the end of the line.  This
means lefthyphenmin is being seen as 1 in the English text, where it
shouldn't be.  lefthyphenmin is indeed 1 for the sanskrit.  Are hyphenmin
settings global and unchangable for a document?  If not, why aren't the
language switching commands changing them?

If I set up the Sanskrit first, and say,


\usepackage{polyglossia}

\usepackage{xltxtra}

\defaultfontfeatures{Mapping=tex-text,Numbers=OldStyle}

\setotherlanguage{sanskrit} % for transliterated Sanskrit

\newfontfamily\sanskritfont %[Script=Devanagari]

{TeX Gyre Pagella}

%

\setmainfont{TeX Gyre Pagella}

\setdefaultlanguage[variant=british]{english}

% Define \sansk{} which is the same as \emph{}, except that it causes
appropriate

% hyphenation

% for Sanskrit words. Use \sansk{} for Sanskrit and \emph{} for English.
\newcommand{\sansk}[1]{\emph{#1}}


Things are okay.  Well, the English is okay.  The Sanskrit has
lefthyphenmins of 2, but that suits me.

NB I'm not using Devanagari, but Roman.  I'd quite like to be able to say
[Script=Latin] (or Roman), to be explicit about this, but it's disallowed.
Anyhow, that's a different topic.

Best,
Dominik


On 4 January 2011 16:25, Dominik Wujastyk <wujastyk at gmail.com> wrote:

> Yup, works perfectly with xltxtra.  Sorry for these elementary questions!
>
> Thanks,
> Dominik
> <https://www.dropbox.com/referrals/NTIzNzI2MTY5>
>
>
> On 4 January 2011 14:19, Jonathan Kew <jfkthame at googlemail.com> wrote:
>
>> On 4 Jan 2011, at 12:44, Dominik Wujastyk wrote:
>>
>> > Minimal example, run with xelatex and TeXlive 2010:
>> >
>> > \documentclass{article}
>> > \usepackage{polyglossia}
>> > \begin{document}
>> > \showhyphens{helicopter}
>> > \end{document}
>> >
>> >
>> > Why does my log file show
>> >
>> > Underfull \hbox (badness 10000) in paragraph at lines 4--4
>> > [] \EU1/lmr/m/n/10 helicopter
>> >
>> > instead of
>> >
>> > Underfull \hbox (badness 10000) in paragraph at lines 4--4
>> > [] \OT1/cmr/m/n/10 he-li-copter
>> >
>>
>> Because the default LaTeX \showhyphens doesn't work with "native" fonts
>> (i.e. those loaded without TFMs, etc) in xetex, and polyglossia loads
>> fontspec which sets the default font to LM loaded as a "native" unicode
>> font.
>>
>> If you try actually using "helicopter" in text, you'll find that it still
>> hyphenates fine.
>>
>> To fix \showhyphens, try loading the xltxtra package.
>>
>> (There's discussion of this somewhere in the list archives, IIRC.)
>>
>> JK
>>
>>
>>
>
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