def available(self):
"""
Condition on the content types wanted for the gallery viewlet
(it was first meant only for Organizations), now it is also used for
folderish content types (collective.folderish)
"""
context = self.context
return IOrganization.providedBy(context) or IFolderishType.providedBy(context)
def available(self):
return not self.anonymous and IFolderishType.providedBy(self.context)
def _enabled_for_archetypes(self):
""" Returns True if discussion is enabled for this conversation.
This method checks five different settings in order to figure out if
discussion is enable on a specific content object:
1) Check if discussion is enabled globally in the plone.app.discussion
registry/control panel.
2) If the current content object is a folder, always return False,
since we don't allow comments on a folder. This setting is used to
allow/ disallow comments for all content objects inside a folder,
not for the folder itself. This does not apply to IFolderishType
objects.
3) Check if the allow_discussion boolean flag on the content object is
set. If it is set to True or False, return the value. If it set to
None, try further.
4) Traverse to a folder with allow_discussion set to either True or
False. If allow_discussion is not set (None), traverse further until
we reach the PloneSiteRoot.
5) Check if discussion is allowed for the content type.
"""
context = aq_inner(self.context)
# Fetch discussion registry
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings, check=False)
# Check if discussion is allowed globally
if not settings.globally_enabled:
return False
# Always return False if object is a folder, except for folderish types
if (not IFolderishType.providedBy(context)
and IFolderish.providedBy(context)
and not INonStructuralFolder.providedBy(context)):
return False
def traverse_parents(context):
# Run through the aq_chain of obj and check if discussion is
# enabled in a parent folder.
for obj in aq_chain(context):
if not IPloneSiteRoot.providedBy(obj):
if (IFolderish.providedBy(obj)
and not INonStructuralFolder.providedBy(obj)):
flag = getattr(obj, 'allow_discussion', None)
if flag is not None:
return flag
return None
# If discussion is disabled for the object, bail out
obj_flag = getattr(aq_base(context), 'allow_discussion', None)
if obj_flag is False:
return False
# Check if traversal returned a folder with discussion_allowed set
# to True or False.
folder_allow_discussion = traverse_parents(context)
if folder_allow_discussion:
if not getattr(self, 'allow_discussion', None):
return True
else:
if obj_flag:
return True
# Check if discussion is allowed on the content type
portal_types = getToolByName(self, 'portal_types')
document_fti = getattr(portal_types, context.portal_type)
if not document_fti.getProperty('allow_discussion'):
# If discussion is not allowed on the content type,
# check if 'allow discussion' is overridden on the content object.
if not obj_flag:
return False
return True
def has_folderish_default(self):
if not IFolderishType.providedBy(self.context):
return False
return isDefaultPage(self.context, self.request)