On 9/27/2017 5:53 PM, Ulrike Fischer wrote:
Am Wed, 27 Sep 2017 15:10:33 +0200 schrieb Tomas Hala:
From this point of view, Auf{}lage seems better.
This doesn't prevent the ligature:
\starttext
Auflage Auf{}lage Auf\/lage
\stoptext
This also documented: "The most important change is that adding a
brace group in the middle of a word (like in of{}fice) does not
prevent ligature creation."
With pdftex it does avoid ligatures, but not reliably. There are
cases where the brace group disappear when pdftex tries out
hyphenation points.
in traditional tex hyphenation is integrated in the par builder which
comes after ligaturing and kerning and tex only hyphenated where it
'makes sense' and in the process (multi-pass, going into disc nodes) it
will consult (deconstruct / reconstruct) ligatures and at that point
it's not known that the input had a {}. Tricks like inserting something
in between is also unreliable when done at the wrong time and it can
also prevent for instance kerns of hyphenation.
Anyway, in addition to Thomas answer ... we already have this
\blockligatures[fi,ff] \blockligatures[fl]
\blockligatures[u:fl:age]
\definefontfeature[default:nolig][default][blockligatures=yes]
\startTEXpage[offset=1em]
\definedfont[Serif*default:nolig]
fi ff fl auflage
\definedfont[Serif*default]
fi ff fl auflage
\stopTEXpage
The \blockligatures[u:fl:age] is new and something of a joke experiment
... I can probably come up with a real advanced and robust mechanism if
motivated enough
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
