def contentHandler(_context, schema, name, title, class_=None,
description='', permission='zope.View',
contenttype=None, ctclass=None,
type=[], contains=(), containers=(), addform=None):
if class_ is None:
type = type + [IInactiveType,]
if IInactiveType in type and IActiveType in type:
type.remove(IActiveType)
# make content type Active if no type is set
if not type:
type.append(IActiveType)
for tp in type:
if tp.isOrExtends(IContentType):
raise ValueError(
'Content type type can not extend IContentType interface.', tp)
# check schema
if class_ is not None and not schema.implementedBy(class_):
raise ValueError(
'Content class should implement content schema.', class_, schema)
# create content type
if ctclass is not None:
if not IContentType.implementedBy(ctclass):
raise ValueError('Custom content type implementation '\
'should implement IContentType interface.')
ct_factory = ctclass
else:
ct_factory = ContentType
ct = ct_factory(
name, schema, class_, title, description, permission, addform)
# set types
interface.alsoProvides(ct, type)
for tp in type:
utility(_context, tp, ct, name=name)
# create unique interface for content type
if contenttype is None:
iname = name
for ch in ('.', '-'):
iname = iname.replace(ch, '_')
contenttype = InterfaceClass(iname, (IContentType,),
__doc__='Content Type: %s' %name,
__module__='zojax.content')
# Add the content type to the `zojax.content` module.
setattr(zojax.content, iname, contenttype)
# register content type as utility
utility(_context, contenttype, ct)
# create named utility for content type
utility(_context, IContentType, ct, name=name)
# adapter that return IContentType object from class instances
adapter(_context, (ClassToTypeAdapter(name),), IContentType, (schema,))
if class_ is not None:
clsifaces = list(interface.implementedBy(class_))
if not IContent.implementedBy(class_):
clsifaces.append(IContent)
clsifaces.extend(type)
interface.classImplements(class_, clsifaces)
# process constraints
_context.action(
discriminator = ('zojax.content:contentTypeConstraints', name),
callable = contentTypeConstraints,
args = (name, contains, containers, _context),
order = 999998)
# added custom interface to contenttype object
_context.action(
discriminator = ('zojax.content:contenttypeInterface', contenttype),
callable = contenttypeInterface,
args = (ct, contenttype))
