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add new widgetmanager to mix fields and content providers in forms (m…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| import zope.component | ||
| import zope.interface | ||
| import zope.location | ||
| import zope.schema.interfaces | ||
| from z3c.form.error import MultipleErrors | ||
| from zope.contentprovider.interfaces import IContentProvider | ||
|
|
||
| from z3c.form.field import FieldWidgets | ||
| from z3c.form import interfaces | ||
| from z3c.form.interfaces import IContentProviders | ||
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|
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| class BaseProvider(object): | ||
| __slots__ = ('position') | ||
|
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| lookup_ = BaseProvider() | ||
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|
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| class ContentProviders(dict): | ||
| zope.interface.implements(IContentProviders) | ||
|
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| def __init__(self, names=None): | ||
| super(ContentProviders, self).__init__() | ||
| if names is not None: | ||
| for position, name in enumerate(names): | ||
| self[name] = lookup_ | ||
|
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| def __setitem__(self, key, value): | ||
| factory = ContentProviderFactory(factory=value, name=key) | ||
| super(ContentProviders, self).__setitem__(key, factory) | ||
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|
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| class ContentProviderFactory(object): | ||
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| def __init__(self, factory, name): | ||
| self.factory = factory | ||
| self.name = name | ||
| self.position = getattr(factory, 'position', None) | ||
|
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| def __call__(self, manager): | ||
| if self.factory != lookup_: | ||
| contentProvider = self.factory(manager.content, manager.request, manager.form) | ||
| else: | ||
| contentProvider = zope.component.getMultiAdapter((manager.content, manager.request, manager.form), | ||
| IContentProvider, self.name) | ||
| return contentProvider | ||
|
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|
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| class FieldWidgetsAndProviders(FieldWidgets): | ||
| zope.component.adapts( | ||
| interfaces.IFieldsAndContentProvidersForm, interfaces.IFormLayer, zope.interface.Interface) | ||
| zope.interface.implementsOnly(interfaces.IWidgets) | ||
|
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||
| def update(self): | ||
| super(FieldWidgetsAndProviders, self).update() | ||
| uniqueOrderedKeys = self._data_keys | ||
| for name in self.form.contentProviders: | ||
| factory = self.form.contentProviders[name] | ||
| if factory.position is None: | ||
| raise ValueError("Position of the following" | ||
| " content provider should be an integer: '%s'." % name) | ||
| contentProvider = factory(self) | ||
| shortName = name | ||
| contentProvider.update() | ||
| uniqueOrderedKeys.insert(factory.position, shortName) | ||
| self._data_values.insert(factory.position, contentProvider) | ||
| self._data[shortName] = contentProvider | ||
| zope.location.locate(contentProvider, self, shortName) | ||
| # allways ensure that we add all keys and keep the order given from | ||
| # button items | ||
| self._data_keys = uniqueOrderedKeys | ||
|
|
||
| def extract(self): | ||
| """See interfaces.IWidgets""" | ||
| data = {} | ||
| errors = () | ||
| for name, widget in self.items(): | ||
| if IContentProvider.providedBy(widget): | ||
| continue | ||
| if widget.mode == interfaces.DISPLAY_MODE: | ||
| continue | ||
| value = widget.field.missing_value | ||
| try: | ||
| widget.setErrors = self.setErrors | ||
| raw = widget.extract() | ||
| if raw is not interfaces.NO_VALUE: | ||
| value = interfaces.IDataConverter(widget).toFieldValue(raw) | ||
| zope.component.getMultiAdapter( | ||
| (self.content, | ||
| self.request, | ||
| self.form, | ||
| getattr(widget, 'field', None), | ||
| widget), | ||
| interfaces.IValidator).validate(value) | ||
| except (zope.interface.Invalid, | ||
| ValueError, MultipleErrors), error: | ||
| view = zope.component.getMultiAdapter( | ||
| (error, self.request, widget, widget.field, | ||
| self.form, self.content), interfaces.IErrorViewSnippet) | ||
| view.update() | ||
| if self.setErrors: | ||
| widget.error = view | ||
| errors += (view,) | ||
| else: | ||
| name = widget.__name__ | ||
| data[name] = value | ||
| for error in self.validate(data): | ||
| view = zope.component.getMultiAdapter( | ||
| (error, self.request, None, None, self.form, self.content), | ||
| interfaces.IErrorViewSnippet) | ||
| view.update() | ||
| errors += (view,) | ||
| if self.setErrors: | ||
| self.errors = errors | ||
| return data, errors |
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