""" HTML Widget classes """ try: set except NameError: from sets import Set as set # Python 2.3 fallback import copy from itertools import chain from django.utils.datastructures import MultiValueDict from django.utils.html import escape from django.utils.translation import ugettext from django.utils.encoding import StrAndUnicode, force_unicode from util import flatatt __all__ = ( 'Widget', 'TextInput', 'PasswordInput', 'HiddenInput', 'MultipleHiddenInput', 'FileInput', 'Textarea', 'CheckboxInput', 'Select', 'NullBooleanSelect', 'SelectMultiple', 'RadioSelect', 'CheckboxSelectMultiple', 'MultiWidget', 'SplitDateTimeWidget', ) class Widget(object): is_hidden = False # Determines whether this corresponds to an . needs_multipart_form = False # Determines does this widget need multipart-encrypted form def __init__(self, attrs=None): if attrs is not None: self.attrs = attrs.copy() else: self.attrs = {} def __deepcopy__(self, memo): obj = copy.copy(self) obj.attrs = self.attrs.copy() memo[id(self)] = obj return obj def render(self, name, value, attrs=None): """ Returns this Widget rendered as HTML, as a Unicode string. The 'value' given is not guaranteed to be valid input, so subclass implementations should program defensively. """ raise NotImplementedError def build_attrs(self, extra_attrs=None, **kwargs): "Helper function for building an attribute dictionary." attrs = dict(self.attrs, **kwargs) if extra_attrs: attrs.update(extra_attrs) return attrs def value_from_datadict(self, data, files, name): """ Given a dictionary of data and this widget's name, returns the value of this widget. Returns None if it's not provided. """ return data.get(name, None) def id_for_label(self, id_): """ Returns the HTML ID attribute of this Widget for use by a