def update(self):
"""See interfaces.IWidgets"""
# Create a unique prefix.
prefix = util.expandPrefix(self.form.prefix)
prefix += util.expandPrefix(self.prefix)
# Walk through each field, making a widget out of it.
uniqueOrderedKeys = []
for field in self.form.fields.values():
# Step 0. Determine whether the context should be ignored.
#-------------------------------------------------------------------
if self.draftable:
ignoreContext = False
else:
ignoreContext = self.ignoreContext
if field.ignoreContext is not None:
ignoreContext = field.ignoreContext
#-------------------------------------------------------------------
# Step 1: Determine the mode of the widget.
mode = self.mode
if field.mode is not None:
mode = field.mode
elif field.field.readonly and not self.ignoreReadonly:
mode = interfaces.DISPLAY_MODE
elif not ignoreContext:
# If we do not have enough permissions to write to the
# attribute, then switch to display mode.
#try:
dm = zope.component.getMultiAdapter(
(self.content, field.field), interfaces.IDataManager)
if not dm.canWrite():
mode = interfaces.DISPLAY_MODE
#except TypeError:
# # If datamanager can not adapt, then we can't write and
# # must ignore context (since it could not adapt)
# ignoreContext = True
# Step 2: Get the widget for the given field.
shortName = field.__name__
newWidget = True
if shortName in self._data:
# reuse existing widget
widget = self._data[shortName]
newWidget = False
elif field.widgetFactory.get(mode) is not None:
factory = field.widgetFactory.get(mode)
widget = factory(field.field, self.request)
else:
widget = zope.component.getMultiAdapter(
(field.field, self.request), interfaces.IFieldWidget)
# Step 2.5: If widget is draftable and no widget exists, create draft
if self.draftable == False and IDraftable.providedBy(widget):
proxy = zope.component.queryMultiAdapter((self.content,
self.request,
self.form), IZ3cFormDataContext)
if proxy is not None:
proxy.createDraft = True
self.content = proxy.adapt()
if IZ3cDraft.providedBy(self.content):
self.draftable = True
ignoreContext = False
# Step 3: Set the prefix for the widget
widget.name = prefix + shortName
widget.id = (prefix + shortName).replace('.', '-')
# Step 4: Set the context
widget.context = self.content
# Step 5: Set the form
widget.form = self.form
# Optimization: Set both interfaces here, rather in step 4 and 5:
# ``alsoProvides`` is quite slow
zope.interface.alsoProvides(
widget, interfaces.IContextAware, interfaces.IFormAware)
# Step 6: Set some variables
widget.ignoreContext = ignoreContext
widget.ignoreRequest = self.ignoreRequest
# Step 7: Set the mode of the widget
widget.mode = mode
# Step 8: Update the widget
widget.update()
#-------------------------------------------------------------------
# Save converted widget value on draft if it different from what is
# already stored on draft
if self.draftable and self.draftWritable == True and ignoreContext == False:
dm = zope.component.getMultiAdapter(
(self.content, field.field), interfaces.IDataManager)
try:
value = interfaces.IDataConverter(widget).toFieldValue(widget.value)
#if getattr(self.content, field.__name__, None) != value:
if dm.query() != value:
dm.set(value)
except ValueError:
pass
#-------------------------------------------------------------------
zope.event.notify(AfterWidgetUpdateEvent(widget))
# Step 9: Add the widget to the manager
if widget.required:
self.hasRequiredFields = True
uniqueOrderedKeys.append(shortName)
if newWidget:
self._data_values.append(widget)
self._data[shortName] = widget
zope.location.locate(widget, self, shortName)
# allways ensure that we add all keys and keep the order given from
# button items
self._data_keys = uniqueOrderedKeys
def adapt(self):
"""If we are drafting a content item, record form data information to the
draft, but read existing data from the underlying object.
"""
# Check to see if we have a cahced copy already
if IZ3cDraft.providedBy(self.request):
return self.request.DRAFT.context
if IDraftable.providedBy(self.request):
self.createDraft = True
# Set up the draft (sets cookies, markers, etc)
draft = getCurrentDraft(self.request, create=False)
if not draft and not self.createDraft:
return self.content
if not draft:
beginDrafting(self.content, self.form)
draft = getCurrentDraft(self.request, create=self.createDraft)
if draft is None:
return self.content # return contnet, not context
context = getattr(draft, 'context', None)
# Initial draft; populate initial values
if context is None:
context = PersistentDict()
# Get all fields from from, including groups so we can store them
# on draft
_fields = []
for field in self.form.fields.items():
_fields.append(field)
if hasattr(self.form, 'groups'):
for group in self.form.groups:
for field in group.fields.items():
_fields.append(field)
for name, field in _fields:
# Provide default value on draft
dm = zope.component.getMultiAdapter(
(self.content, field.field), interfaces.IDataManager)
try:
value = dm.query(field)
except TypeError:
value = field.field.default or field.field.missing_value
context[field.field.__name__] = value
zope.interface.alsoProvides(context, IZ3cDraft)
zope.interface.alsoProvides(context, IDrafting)
setattr(draft, 'context', context)
zope.interface.alsoProvides(draft, IZ3cDraft)
zope.interface.alsoProvides(self.request, IZ3cDraft)
# Cache draft
self.request['DRAFT'] = draft
return context
