Eclipse autocomplete (content assist) with facelets (jsf) and xhtml

Question

How to activate eclipse (3.5, WTP) content assist in .xhtml pages for JSF (1.2) tags, using facelets? It works in .jsp files, but not xhtml.

I google a lot, and in m

Answer 1

Suggestion: in eclipse Indigo(classic) and working with maven projects

as the picture you can see bellow, can't find Project Facets selection that @mist suggested (because am haven't installed any plugins but m2e I guess).

so, I did this to solve that issue:

Window >> Preference >> General >> Content Types >> XML >> Add file association (*.xhtml)

this work not so well (content stoppage).