Hi Thanh
removing those features is trivial. The question is:
- is it worthwhile to have them, at least with some limitations?
i think that, since they're in there, they are used; that has always been the problem with pdftex being a front runner ... eager users start using things; however, we can make a remark that in pdftex 2 these features may become obsolete and be replaced by more controllable generic mechanisms ; and also a remark that side effects will not be dealt with; this permits usage in controlled situations after all, hz and protruding also have side effects (due to global font data) ; users cannot expect wonders from you within the current tex
- are they already used and hence removing them can cause trouble?
AFAIK only Robert Schlicht and Ulrich Dirr have been playing with them a little bit, but nobody has made any use of those in serious work. Please correct me if I am wrong.
i do support them but i dunno if users use them
Of course I am happy to play with those features when luatex is ready for that.
that will be the case in a couple of months (taco is now going to open up the font mechanisms) by that time all font extensions that you made need to be revised anyway (hz and protruding and such) , so you'll have a busy future ahead -) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------