def formatter_for_field(field, name=''):
'''Get a proper formatter for a zope.schema.Field instance.
'''
assert isinstance(field, zope.schema.Field)
# Build adaptee vector
adaptee = build_adaptee(field, expand_collection=True)
# Lookup
candidates = ['format']
if name:
candidates.insert(0, 'format:%s' % (name))
formatter = None
while adaptee:
for candidate in candidates:
formatter = adapter_registry.queryMultiAdapter(
adaptee, IFormatter, candidate)
if formatter:
break
if formatter:
break
# Fallback to a more general version of this adaptee
adaptee.pop()
if formatter:
formatter.requested_name = name
return formatter
def formatter_for_field(field, name=''):
'''Get a proper formatter for a zope.schema.Field instance.
'''
assert isinstance(field, zope.schema.Field)
# Build adaptee vector
adaptee = build_adaptee(field, expand_collection=True)
# Lookup
candidates = ['format']
if name:
candidates.insert(0, 'format:%s' % (name))
formatter = None
while adaptee:
for candidate in candidates:
formatter = adapter_registry.queryMultiAdapter(
adaptee, IFormatter, candidate)
if formatter:
break
if formatter:
break
# Fallback to a more general version of this adaptee
adaptee.pop()
if formatter:
formatter.requested_name = name
return formatter
def widget_for_field(qualified_action, field, errors={}):
'''Find and instantiate a widget to adapt a field to a widget interface.
The given field should be a bound instance of zope.schema.Field.
'''
# Build a list with candidate names
q = qualified_action
if isinstance(q, basestring):
q = QualAction.from_string(q)
candidates = list(reversed(q.parents() + [q]))
# Build adaptee vector
adaptee = build_adaptee(field, expand_collection=True)
# Lookup registry
widget = None
while len(adaptee):
for candidate in candidates:
name = candidate.to_string()
widget = adapter_registry.queryMultiAdapter(
adaptee, IFieldWidget, name)
logger.debug('Trying to adapt [%s] to widget for action %s: %r',
', '.join([type(x).__name__ for x in adaptee]), name,
widget if widget else None)
if widget:
break
if widget:
break
# Fall back to a more general version of this adaptee
adaptee.pop()
if widget:
widget.context = LookupContext(requested=q, provided=candidate)
widget.errors = errors
else:
raise WidgetNotFound(qualified_action, field)
# Found
assert zope.interface.verify.verifyObject(IFieldWidget, widget)
return widget
def widget_for_field(qualified_action, field, errors={}):
'''Find and instantiate a widget to adapt a field to a widget interface.
The given field should be a bound instance of zope.schema.Field.
'''
# Build a list with candidate names
q = qualified_action
if isinstance(q, basestring):
q = QualAction.from_string(q)
candidates = list(reversed(q.parents() + [q]))
# Build adaptee vector
adaptee = build_adaptee(field, expand_collection=True)
# Lookup registry
widget = None
while len(adaptee):
for candidate in candidates:
name = candidate.to_string()
widget = adapter_registry.queryMultiAdapter(adaptee, IFieldWidget, name)
logger.debug('Trying to adapt [%s] to widget for action %s: %r',
', '.join([type(x).__name__ for x in adaptee]), name,
widget if widget else None)
if widget:
break
if widget:
break
# Fall back to a more general version of this adaptee
adaptee.pop()
if widget:
widget.context = LookupContext(requested=q, provided=candidate)
widget.errors = errors
else:
raise WidgetNotFound(qualified_action, field)
# Found
assert zope.interface.verify.verifyObject(IFieldWidget, widget)
return widget
