registry vocabulary

rvocabulary.py

from zope import component
from zope import interface
from zope.schema.vocabulary import SimpleVocabulary, SimpleTerm
from zope.schema.interfaces import IVocabularyFactory
from plone.i18n.normalizer.base import baseNormalize


class RegistryVocabulary(object):
    """vocabulary to use with plone.app.registry"""
    interface.implements(IVocabularyFactory)

    def __init__(self, key):
        self.key = key

    def __call__(self, context):

        registry = component.queryUtility(IRegistry)
        if registry is None:
            return []
        categories = registry[self.key]
        terms = [SimpleTerm(baseNormalize(category),
                            baseNormalize(category),
                            category) for category in categories]
        return SimpleVocabulary(terms)