def query_view_layout(view, interface=ILayout, name=""):
"""Returns a layout associated to the view's request and context.
"""
assert IView.providedBy(view)
assert interface.isOrExtends(ILayout)
return queryMultiAdapter(
(view.request, view.context), interface, name=name)
def __call__(self, request, obj, stack):
"""Resolves a view.
"""
default_fallback = False
unconsumed_amount = len(stack)
if unconsumed_amount == 0:
default_fallback = True
ns, name = VIEW, self.default_name
elif unconsumed_amount == 1:
ns, name = stack[0]
else:
raise ResolveError(
"Can't resolve view: stack is not fully consumed.")
if ns not in (DEFAULT, VIEW):
raise ResolveError(
"Can't resolve view: namespace %r is not supported." % ns)
# If this is the last node AND if it's a view, we return it.
if default_fallback and IView.providedBy(obj):
return obj
# Else, we need to resolve the model into a view.
view = self.lookup(request, obj, name)
if view is None:
if default_fallback:
raise ResolveError(
"Can't resolve view: no default view on %r." % obj)
else:
if ns == VIEW:
raise ResolveError(
"Can't resolve view: no view `%s` on %r." % (name, obj))
raise ResolveError(
"%r is neither a view nor a model." % name)
return view
def query_view_template(view, interface=ITemplate, name=""):
"""Returns a template associated to a view, or None.
"""
assert IView.providedBy(view)
assert interface.isOrExtends(ITemplate)
return queryMultiAdapter(
(view, view.request), interface, name=name)
def update(self):
#tabs = ITab.all_components(self.context, self.request)
tabs=IView.all_components(self.context, self.request)
predict, _ = getSecurityGuards()
if predict is not None:
tabs = (
(name, tab) for name, tab in tabs
if predict(tab, swallow_errors=True) is not None)
self._tabs = sort_components(tabs, key=sort_key)
self.available = len(self._tabs) > 0
def query_viewlet_manager(view, context=None, request=None,
interface=IViewletManager, name=''):
"""Retrieve a viewlet manager"""
assert IView.providedBy(view), "view must implements IView"
if context is None:
context = view.context
if request is None:
request = view.request
assert interface.isOrExtends(IViewletManager), (
"interface must extends IViewletManager")
assert IRequest.providedBy(request), "request must be an IRequest"
return getMultiAdapter((context, request, view), interface, name)
def get_tabs(self, view=None):
tabs = []
base_url = get_absolute_url(self.context, self.request)
if view is not None:
current = (crom.name.get(view), view.__class__)
for name, klass in sort_components(
IView.all_components(self.context, self.request), key=sorter):
tabs.append({
'id': name,
'title': title.get(klass) or name,
'selected': current == (name, klass),
'url': '%s/%s' % (base_url, name),
})
if len(tabs) == 1 and tabs[0]['selected']:
return []
return tabs
def query_viewlet_manager(view, context=None, request=None,
interface=IViewletManager, name=''):
"""Retrieve a viewlet manager"""
assert IView.providedBy(view), "view must implements IView"
if context is None:
context = view.context
if request is None:
request = view.request
assert interface.isOrExtends(IViewletManager), (
"interface must extends IViewletManager")
assert IRequest.providedBy(request), "request must be an IRequest"
security_predict, security_check = getSecurityGuards()
try:
factory = interface.component(context, request, view, name=name)
if factory is not None and security_predict is not None:
factory = security_predict(factory) # raises if security error
manager = factory(context, request, view)
if security_check is not None:
manager = security_check(manager) # raises if security error
except ComponentLookupError:
pass
else:
return manager
