884 lines
32 KiB
Python
884 lines
32 KiB
Python
"""
|
|
HTML Widget classes
|
|
"""
|
|
|
|
from __future__ import unicode_literals
|
|
|
|
import copy
|
|
from itertools import chain
|
|
import warnings
|
|
|
|
from django.conf import settings
|
|
from django.forms.utils import flatatt, to_current_timezone
|
|
from django.utils.datastructures import MultiValueDict, MergeDict
|
|
from django.utils.html import conditional_escape, format_html
|
|
from django.utils.translation import ugettext_lazy
|
|
from django.utils.encoding import force_text, python_2_unicode_compatible
|
|
from django.utils.safestring import mark_safe
|
|
from django.utils import datetime_safe, formats, six
|
|
from django.utils.six.moves.urllib.parse import urljoin
|
|
|
|
__all__ = (
|
|
'Media', 'MediaDefiningClass', 'Widget', 'TextInput',
|
|
'EmailInput', 'URLInput', 'NumberInput', 'PasswordInput',
|
|
'HiddenInput', 'MultipleHiddenInput', 'ClearableFileInput',
|
|
'FileInput', 'DateInput', 'DateTimeInput', 'TimeInput', 'Textarea', 'CheckboxInput',
|
|
'Select', 'NullBooleanSelect', 'SelectMultiple', 'RadioSelect',
|
|
'CheckboxSelectMultiple', 'MultiWidget',
|
|
'SplitDateTimeWidget', 'SplitHiddenDateTimeWidget',
|
|
)
|
|
|
|
MEDIA_TYPES = ('css','js')
|
|
|
|
@python_2_unicode_compatible
|
|
class Media(object):
|
|
def __init__(self, media=None, **kwargs):
|
|
if media:
|
|
media_attrs = media.__dict__
|
|
else:
|
|
media_attrs = kwargs
|
|
|
|
self._css = {}
|
|
self._js = []
|
|
|
|
for name in MEDIA_TYPES:
|
|
getattr(self, 'add_' + name)(media_attrs.get(name, None))
|
|
|
|
# Any leftover attributes must be invalid.
|
|
# if media_attrs != {}:
|
|
# raise TypeError("'class Media' has invalid attribute(s): %s" % ','.join(media_attrs.keys()))
|
|
|
|
def __str__(self):
|
|
return self.render()
|
|
|
|
def render(self):
|
|
return mark_safe('\n'.join(chain(*[getattr(self, 'render_' + name)() for name in MEDIA_TYPES])))
|
|
|
|
def render_js(self):
|
|
return [format_html('<script type="text/javascript" src="{0}"></script>', self.absolute_path(path)) for path in self._js]
|
|
|
|
def render_css(self):
|
|
# To keep rendering order consistent, we can't just iterate over items().
|
|
# We need to sort the keys, and iterate over the sorted list.
|
|
media = sorted(self._css.keys())
|
|
return chain(*[
|
|
[format_html('<link href="{0}" type="text/css" media="{1}" rel="stylesheet" />', self.absolute_path(path), medium)
|
|
for path in self._css[medium]]
|
|
for medium in media])
|
|
|
|
def absolute_path(self, path, prefix=None):
|
|
if path.startswith(('http://', 'https://', '/')):
|
|
return path
|
|
if prefix is None:
|
|
if settings.STATIC_URL is None:
|
|
# backwards compatibility
|
|
prefix = settings.MEDIA_URL
|
|
else:
|
|
prefix = settings.STATIC_URL
|
|
return urljoin(prefix, path)
|
|
|
|
def __getitem__(self, name):
|
|
"Returns a Media object that only contains media of the given type"
|
|
if name in MEDIA_TYPES:
|
|
return Media(**{str(name): getattr(self, '_' + name)})
|
|
raise KeyError('Unknown media type "%s"' % name)
|
|
|
|
def add_js(self, data):
|
|
if data:
|
|
for path in data:
|
|
if path not in self._js:
|
|
self._js.append(path)
|
|
|
|
def add_css(self, data):
|
|
if data:
|
|
for medium, paths in data.items():
|
|
for path in paths:
|
|
if not self._css.get(medium) or path not in self._css[medium]:
|
|
self._css.setdefault(medium, []).append(path)
|
|
|
|
def __add__(self, other):
|
|
combined = Media()
|
|
for name in MEDIA_TYPES:
|
|
getattr(combined, 'add_' + name)(getattr(self, '_' + name, None))
|
|
getattr(combined, 'add_' + name)(getattr(other, '_' + name, None))
|
|
return combined
|
|
|
|
def media_property(cls):
|
|
def _media(self):
|
|
# Get the media property of the superclass, if it exists
|
|
sup_cls = super(cls, self)
|
|
try:
|
|
base = sup_cls.media
|
|
except AttributeError:
|
|
base = Media()
|
|
|
|
# Get the media definition for this class
|
|
definition = getattr(cls, 'Media', None)
|
|
if definition:
|
|
extend = getattr(definition, 'extend', True)
|
|
if extend:
|
|
if extend == True:
|
|
m = base
|
|
else:
|
|
m = Media()
|
|
for medium in extend:
|
|
m = m + base[medium]
|
|
return m + Media(definition)
|
|
else:
|
|
return Media(definition)
|
|
else:
|
|
return base
|
|
return property(_media)
|
|
|
|
class MediaDefiningClass(type):
|
|
"Metaclass for classes that can have media definitions"
|
|
def __new__(cls, name, bases, attrs):
|
|
new_class = super(MediaDefiningClass, cls).__new__(cls, name, bases,
|
|
attrs)
|
|
if 'media' not in attrs:
|
|
new_class.media = media_property(new_class)
|
|
return new_class
|
|
|
|
@python_2_unicode_compatible
|
|
class SubWidget(object):
|
|
"""
|
|
Some widgets are made of multiple HTML elements -- namely, RadioSelect.
|
|
This is a class that represents the "inner" HTML element of a widget.
|
|
"""
|
|
def __init__(self, parent_widget, name, value, attrs, choices):
|
|
self.parent_widget = parent_widget
|
|
self.name, self.value = name, value
|
|
self.attrs, self.choices = attrs, choices
|
|
|
|
def __str__(self):
|
|
args = [self.name, self.value, self.attrs]
|
|
if self.choices:
|
|
args.append(self.choices)
|
|
return self.parent_widget.render(*args)
|
|
|
|
class Widget(six.with_metaclass(MediaDefiningClass)):
|
|
is_hidden = False # Determines whether this corresponds to an <input type="hidden">.
|
|
needs_multipart_form = False # Determines does this widget need multipart form
|
|
is_localized = False
|
|
is_required = False
|
|
|
|
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 subwidgets(self, name, value, attrs=None, choices=()):
|
|
"""
|
|
Yields all "subwidgets" of this widget. Used only by RadioSelect to
|
|
allow template access to individual <input type="radio"> buttons.
|
|
|
|
Arguments are the same as for render().
|
|
"""
|
|
yield SubWidget(self, name, value, attrs, choices)
|
|
|
|
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('subclasses of Widget must provide a render() method')
|
|
|
|
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 <label>,
|
|
given the ID of the field. Returns None if no ID is available.
|
|
|
|
This hook is necessary because some widgets have multiple HTML
|
|
elements and, thus, multiple IDs. In that case, this method should
|
|
return an ID value that corresponds to the first ID in the widget's
|
|
tags.
|
|
"""
|
|
return id_
|
|
|
|
class Input(Widget):
|
|
"""
|
|
Base class for all <input> widgets (except type='checkbox' and
|
|
type='radio', which are special).
|
|
"""
|
|
input_type = None # Subclasses must define this.
|
|
|
|
def _format_value(self, value):
|
|
if self.is_localized:
|
|
return formats.localize_input(value)
|
|
return value
|
|
|
|
def render(self, name, value, attrs=None):
|
|
if value is None:
|
|
value = ''
|
|
final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
|
|
if value != '':
|
|
# Only add the 'value' attribute if a value is non-empty.
|
|
final_attrs['value'] = force_text(self._format_value(value))
|
|
return format_html('<input{0} />', flatatt(final_attrs))
|
|
|
|
|
|
class TextInput(Input):
|
|
input_type = 'text'
|
|
|
|
def __init__(self, attrs=None):
|
|
if attrs is not None:
|
|
self.input_type = attrs.pop('type', self.input_type)
|
|
super(TextInput, self).__init__(attrs)
|
|
|
|
|
|
class NumberInput(TextInput):
|
|
input_type = 'number'
|
|
|
|
|
|
class EmailInput(TextInput):
|
|
input_type = 'email'
|
|
|
|
|
|
class URLInput(TextInput):
|
|
input_type = 'url'
|
|
|
|
|
|
class PasswordInput(TextInput):
|
|
input_type = 'password'
|
|
|
|
def __init__(self, attrs=None, render_value=False):
|
|
super(PasswordInput, self).__init__(attrs)
|
|
self.render_value = render_value
|
|
|
|
def render(self, name, value, attrs=None):
|
|
if not self.render_value: value=None
|
|
return super(PasswordInput, self).render(name, value, attrs)
|
|
|
|
class HiddenInput(Input):
|
|
input_type = 'hidden'
|
|
is_hidden = True
|
|
|
|
class MultipleHiddenInput(HiddenInput):
|
|
"""
|
|
A widget that handles <input type="hidden"> for fields that have a list
|
|
of values.
|
|
"""
|
|
def __init__(self, attrs=None, choices=()):
|
|
super(MultipleHiddenInput, self).__init__(attrs)
|
|
# choices can be any iterable
|
|
self.choices = choices
|
|
|
|
def render(self, name, value, attrs=None, choices=()):
|
|
if value is None: value = []
|
|
final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
|
|
id_ = final_attrs.get('id', None)
|
|
inputs = []
|
|
for i, v in enumerate(value):
|
|
input_attrs = dict(value=force_text(v), **final_attrs)
|
|
if id_:
|
|
# An ID attribute was given. Add a numeric index as a suffix
|
|
# so that the inputs don't all have the same ID attribute.
|
|
input_attrs['id'] = '%s_%s' % (id_, i)
|
|
inputs.append(format_html('<input{0} />', flatatt(input_attrs)))
|
|
return mark_safe('\n'.join(inputs))
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
if isinstance(data, (MultiValueDict, MergeDict)):
|
|
return data.getlist(name)
|
|
return data.get(name, None)
|
|
|
|
class FileInput(Input):
|
|
input_type = 'file'
|
|
needs_multipart_form = True
|
|
|
|
def render(self, name, value, attrs=None):
|
|
return super(FileInput, self).render(name, None, attrs=attrs)
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
"File widgets take data from FILES, not POST"
|
|
return files.get(name, None)
|
|
|
|
|
|
FILE_INPUT_CONTRADICTION = object()
|
|
|
|
class ClearableFileInput(FileInput):
|
|
initial_text = ugettext_lazy('Currently')
|
|
input_text = ugettext_lazy('Change')
|
|
clear_checkbox_label = ugettext_lazy('Clear')
|
|
|
|
template_with_initial = '%(initial_text)s: %(initial)s %(clear_template)s<br />%(input_text)s: %(input)s'
|
|
|
|
template_with_clear = '%(clear)s <label for="%(clear_checkbox_id)s">%(clear_checkbox_label)s</label>'
|
|
|
|
url_markup_template = '<a href="{0}">{1}</a>'
|
|
|
|
def clear_checkbox_name(self, name):
|
|
"""
|
|
Given the name of the file input, return the name of the clear checkbox
|
|
input.
|
|
"""
|
|
return name + '-clear'
|
|
|
|
def clear_checkbox_id(self, name):
|
|
"""
|
|
Given the name of the clear checkbox input, return the HTML id for it.
|
|
"""
|
|
return name + '_id'
|
|
|
|
def render(self, name, value, attrs=None):
|
|
substitutions = {
|
|
'initial_text': self.initial_text,
|
|
'input_text': self.input_text,
|
|
'clear_template': '',
|
|
'clear_checkbox_label': self.clear_checkbox_label,
|
|
}
|
|
template = '%(input)s'
|
|
substitutions['input'] = super(ClearableFileInput, self).render(name, value, attrs)
|
|
|
|
if value and hasattr(value, "url"):
|
|
template = self.template_with_initial
|
|
substitutions['initial'] = format_html(self.url_markup_template,
|
|
value.url,
|
|
force_text(value))
|
|
if not self.is_required:
|
|
checkbox_name = self.clear_checkbox_name(name)
|
|
checkbox_id = self.clear_checkbox_id(checkbox_name)
|
|
substitutions['clear_checkbox_name'] = conditional_escape(checkbox_name)
|
|
substitutions['clear_checkbox_id'] = conditional_escape(checkbox_id)
|
|
substitutions['clear'] = CheckboxInput().render(checkbox_name, False, attrs={'id': checkbox_id})
|
|
substitutions['clear_template'] = self.template_with_clear % substitutions
|
|
|
|
return mark_safe(template % substitutions)
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
upload = super(ClearableFileInput, self).value_from_datadict(data, files, name)
|
|
if not self.is_required and CheckboxInput().value_from_datadict(
|
|
data, files, self.clear_checkbox_name(name)):
|
|
if upload:
|
|
# If the user contradicts themselves (uploads a new file AND
|
|
# checks the "clear" checkbox), we return a unique marker
|
|
# object that FileField will turn into a ValidationError.
|
|
return FILE_INPUT_CONTRADICTION
|
|
# False signals to clear any existing value, as opposed to just None
|
|
return False
|
|
return upload
|
|
|
|
class Textarea(Widget):
|
|
def __init__(self, attrs=None):
|
|
# The 'rows' and 'cols' attributes are required for HTML correctness.
|
|
default_attrs = {'cols': '40', 'rows': '10'}
|
|
if attrs:
|
|
default_attrs.update(attrs)
|
|
super(Textarea, self).__init__(default_attrs)
|
|
|
|
def render(self, name, value, attrs=None):
|
|
if value is None: value = ''
|
|
final_attrs = self.build_attrs(attrs, name=name)
|
|
return format_html('<textarea{0}>\r\n{1}</textarea>',
|
|
flatatt(final_attrs),
|
|
force_text(value))
|
|
|
|
|
|
class DateInput(TextInput):
|
|
def __init__(self, attrs=None, format=None):
|
|
super(DateInput, self).__init__(attrs)
|
|
if format:
|
|
self.format = format
|
|
self.manual_format = True
|
|
else:
|
|
self.format = formats.get_format('DATE_INPUT_FORMATS')[0]
|
|
self.manual_format = False
|
|
|
|
def _format_value(self, value):
|
|
if self.is_localized and not self.manual_format:
|
|
return formats.localize_input(value)
|
|
elif hasattr(value, 'strftime'):
|
|
value = datetime_safe.new_date(value)
|
|
return value.strftime(self.format)
|
|
return value
|
|
|
|
|
|
class DateTimeInput(TextInput):
|
|
def __init__(self, attrs=None, format=None):
|
|
super(DateTimeInput, self).__init__(attrs)
|
|
if format:
|
|
self.format = format
|
|
self.manual_format = True
|
|
else:
|
|
self.format = formats.get_format('DATETIME_INPUT_FORMATS')[0]
|
|
self.manual_format = False
|
|
|
|
def _format_value(self, value):
|
|
if self.is_localized and not self.manual_format:
|
|
return formats.localize_input(value)
|
|
elif hasattr(value, 'strftime'):
|
|
value = datetime_safe.new_datetime(value)
|
|
return value.strftime(self.format)
|
|
return value
|
|
|
|
|
|
class TimeInput(TextInput):
|
|
def __init__(self, attrs=None, format=None):
|
|
super(TimeInput, self).__init__(attrs)
|
|
if format:
|
|
self.format = format
|
|
self.manual_format = True
|
|
else:
|
|
self.format = formats.get_format('TIME_INPUT_FORMATS')[0]
|
|
self.manual_format = False
|
|
|
|
def _format_value(self, value):
|
|
if self.is_localized and not self.manual_format:
|
|
return formats.localize_input(value)
|
|
elif hasattr(value, 'strftime'):
|
|
return value.strftime(self.format)
|
|
return value
|
|
|
|
|
|
# Defined at module level so that CheckboxInput is picklable (#17976)
|
|
def boolean_check(v):
|
|
return not (v is False or v is None or v == '')
|
|
|
|
|
|
class CheckboxInput(Widget):
|
|
def __init__(self, attrs=None, check_test=None):
|
|
super(CheckboxInput, self).__init__(attrs)
|
|
# check_test is a callable that takes a value and returns True
|
|
# if the checkbox should be checked for that value.
|
|
self.check_test = boolean_check if check_test is None else check_test
|
|
|
|
def render(self, name, value, attrs=None):
|
|
final_attrs = self.build_attrs(attrs, type='checkbox', name=name)
|
|
if self.check_test(value):
|
|
final_attrs['checked'] = 'checked'
|
|
if not (value is True or value is False or value is None or value == ''):
|
|
# Only add the 'value' attribute if a value is non-empty.
|
|
final_attrs['value'] = force_text(value)
|
|
return format_html('<input{0} />', flatatt(final_attrs))
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
if name not in data:
|
|
# A missing value means False because HTML form submission does not
|
|
# send results for unselected checkboxes.
|
|
return False
|
|
value = data.get(name)
|
|
# Translate true and false strings to boolean values.
|
|
values = {'true': True, 'false': False}
|
|
if isinstance(value, six.string_types):
|
|
value = values.get(value.lower(), value)
|
|
return bool(value)
|
|
|
|
|
|
class Select(Widget):
|
|
allow_multiple_selected = False
|
|
|
|
def __init__(self, attrs=None, choices=()):
|
|
super(Select, self).__init__(attrs)
|
|
# choices can be any iterable, but we may need to render this widget
|
|
# multiple times. Thus, collapse it into a list so it can be consumed
|
|
# more than once.
|
|
self.choices = list(choices)
|
|
|
|
def render(self, name, value, attrs=None, choices=()):
|
|
if value is None: value = ''
|
|
final_attrs = self.build_attrs(attrs, name=name)
|
|
output = [format_html('<select{0}>', flatatt(final_attrs))]
|
|
options = self.render_options(choices, [value])
|
|
if options:
|
|
output.append(options)
|
|
output.append('</select>')
|
|
return mark_safe('\n'.join(output))
|
|
|
|
def render_option(self, selected_choices, option_value, option_label):
|
|
if option_value == None:
|
|
option_value = ''
|
|
option_value = force_text(option_value)
|
|
if option_value in selected_choices:
|
|
selected_html = mark_safe(' selected="selected"')
|
|
if not self.allow_multiple_selected:
|
|
# Only allow for a single selection.
|
|
selected_choices.remove(option_value)
|
|
else:
|
|
selected_html = ''
|
|
return format_html('<option value="{0}"{1}>{2}</option>',
|
|
option_value,
|
|
selected_html,
|
|
force_text(option_label))
|
|
|
|
def render_options(self, choices, selected_choices):
|
|
# Normalize to strings.
|
|
selected_choices = set(force_text(v) for v in selected_choices)
|
|
output = []
|
|
for option_value, option_label in chain(self.choices, choices):
|
|
if isinstance(option_label, (list, tuple)):
|
|
output.append(format_html('<optgroup label="{0}">', force_text(option_value)))
|
|
for option in option_label:
|
|
output.append(self.render_option(selected_choices, *option))
|
|
output.append('</optgroup>')
|
|
else:
|
|
output.append(self.render_option(selected_choices, option_value, option_label))
|
|
return '\n'.join(output)
|
|
|
|
class NullBooleanSelect(Select):
|
|
"""
|
|
A Select Widget intended to be used with NullBooleanField.
|
|
"""
|
|
def __init__(self, attrs=None):
|
|
choices = (('1', ugettext_lazy('Unknown')),
|
|
('2', ugettext_lazy('Yes')),
|
|
('3', ugettext_lazy('No')))
|
|
super(NullBooleanSelect, self).__init__(attrs, choices)
|
|
|
|
def render(self, name, value, attrs=None, choices=()):
|
|
try:
|
|
value = {True: '2', False: '3', '2': '2', '3': '3'}[value]
|
|
except KeyError:
|
|
value = '1'
|
|
return super(NullBooleanSelect, self).render(name, value, attrs, choices)
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
value = data.get(name, None)
|
|
return {'2': True,
|
|
True: True,
|
|
'True': True,
|
|
'3': False,
|
|
'False': False,
|
|
False: False}.get(value, None)
|
|
|
|
|
|
class SelectMultiple(Select):
|
|
allow_multiple_selected = True
|
|
|
|
def render(self, name, value, attrs=None, choices=()):
|
|
if value is None: value = []
|
|
final_attrs = self.build_attrs(attrs, name=name)
|
|
output = [format_html('<select multiple="multiple"{0}>', flatatt(final_attrs))]
|
|
options = self.render_options(choices, value)
|
|
if options:
|
|
output.append(options)
|
|
output.append('</select>')
|
|
return mark_safe('\n'.join(output))
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
if isinstance(data, (MultiValueDict, MergeDict)):
|
|
return data.getlist(name)
|
|
return data.get(name, None)
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class ChoiceInput(SubWidget):
|
|
"""
|
|
An object used by ChoiceFieldRenderer that represents a single
|
|
<input type='$input_type'>.
|
|
"""
|
|
input_type = None # Subclasses must define this
|
|
|
|
def __init__(self, name, value, attrs, choice, index):
|
|
self.name = name
|
|
self.value = value
|
|
self.attrs = attrs
|
|
self.choice_value = force_text(choice[0])
|
|
self.choice_label = force_text(choice[1])
|
|
self.index = index
|
|
if 'id' in self.attrs:
|
|
self.attrs['id'] += "_%d" % self.index
|
|
|
|
def __str__(self):
|
|
return self.render()
|
|
|
|
def render(self, name=None, value=None, attrs=None, choices=()):
|
|
if self.id_for_label:
|
|
label_for = format_html(' for="{0}"', self.id_for_label)
|
|
else:
|
|
label_for = ''
|
|
return format_html('<label{0}>{1} {2}</label>', label_for, self.tag(), self.choice_label)
|
|
|
|
def is_checked(self):
|
|
return self.value == self.choice_value
|
|
|
|
def tag(self):
|
|
final_attrs = dict(self.attrs, type=self.input_type, name=self.name, value=self.choice_value)
|
|
if self.is_checked():
|
|
final_attrs['checked'] = 'checked'
|
|
return format_html('<input{0} />', flatatt(final_attrs))
|
|
|
|
@property
|
|
def id_for_label(self):
|
|
return self.attrs.get('id', '')
|
|
|
|
|
|
class RadioChoiceInput(ChoiceInput):
|
|
input_type = 'radio'
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(RadioChoiceInput, self).__init__(*args, **kwargs)
|
|
self.value = force_text(self.value)
|
|
|
|
|
|
class RadioInput(RadioChoiceInput):
|
|
def __init__(self, *args, **kwargs):
|
|
msg = "RadioInput has been deprecated. Use RadioChoiceInput instead."
|
|
warnings.warn(msg, DeprecationWarning, stacklevel=2)
|
|
super(RadioInput, self).__init__(*args, **kwargs)
|
|
|
|
|
|
class CheckboxChoiceInput(ChoiceInput):
|
|
input_type = 'checkbox'
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(CheckboxChoiceInput, self).__init__(*args, **kwargs)
|
|
self.value = set(force_text(v) for v in self.value)
|
|
|
|
def is_checked(self):
|
|
return self.choice_value in self.value
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class ChoiceFieldRenderer(object):
|
|
"""
|
|
An object used by RadioSelect to enable customization of radio widgets.
|
|
"""
|
|
|
|
choice_input_class = None
|
|
|
|
def __init__(self, name, value, attrs, choices):
|
|
self.name = name
|
|
self.value = value
|
|
self.attrs = attrs
|
|
self.choices = choices
|
|
|
|
def __getitem__(self, idx):
|
|
choice = self.choices[idx] # Let the IndexError propogate
|
|
return self.choice_input_class(self.name, self.value, self.attrs.copy(), choice, idx)
|
|
|
|
def __str__(self):
|
|
return self.render()
|
|
|
|
def render(self):
|
|
"""
|
|
Outputs a <ul> for this set of choice fields.
|
|
If an id was given to the field, it is applied to the <ul> (each
|
|
item in the list will get an id of `$id_$i`).
|
|
"""
|
|
id_ = self.attrs.get('id', None)
|
|
start_tag = format_html('<ul id="{0}">', id_) if id_ else '<ul>'
|
|
output = [start_tag]
|
|
for i, choice in enumerate(self.choices):
|
|
choice_value, choice_label = choice
|
|
if isinstance(choice_label, (tuple,list)):
|
|
attrs_plus = self.attrs.copy()
|
|
if id_:
|
|
attrs_plus['id'] += '_{0}'.format(i)
|
|
sub_ul_renderer = ChoiceFieldRenderer(name=self.name,
|
|
value=self.value,
|
|
attrs=attrs_plus,
|
|
choices=choice_label)
|
|
sub_ul_renderer.choice_input_class = self.choice_input_class
|
|
output.append(format_html('<li>{0}{1}</li>', choice_value,
|
|
sub_ul_renderer.render()))
|
|
else:
|
|
w = self.choice_input_class(self.name, self.value,
|
|
self.attrs.copy(), choice, i)
|
|
output.append(format_html('<li>{0}</li>', force_text(w)))
|
|
output.append('</ul>')
|
|
return mark_safe('\n'.join(output))
|
|
|
|
|
|
class RadioFieldRenderer(ChoiceFieldRenderer):
|
|
choice_input_class = RadioChoiceInput
|
|
|
|
|
|
class CheckboxFieldRenderer(ChoiceFieldRenderer):
|
|
choice_input_class = CheckboxChoiceInput
|
|
|
|
|
|
class RendererMixin(object):
|
|
renderer = None # subclasses must define this
|
|
_empty_value = None
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
# Override the default renderer if we were passed one.
|
|
renderer = kwargs.pop('renderer', None)
|
|
if renderer:
|
|
self.renderer = renderer
|
|
super(RendererMixin, self).__init__(*args, **kwargs)
|
|
|
|
def subwidgets(self, name, value, attrs=None, choices=()):
|
|
for widget in self.get_renderer(name, value, attrs, choices):
|
|
yield widget
|
|
|
|
def get_renderer(self, name, value, attrs=None, choices=()):
|
|
"""Returns an instance of the renderer."""
|
|
if value is None:
|
|
value = self._empty_value
|
|
final_attrs = self.build_attrs(attrs)
|
|
choices = list(chain(self.choices, choices))
|
|
return self.renderer(name, value, final_attrs, choices)
|
|
|
|
def render(self, name, value, attrs=None, choices=()):
|
|
return self.get_renderer(name, value, attrs, choices).render()
|
|
|
|
def id_for_label(self, id_):
|
|
# Widgets using this RendererMixin are made of a collection of
|
|
# subwidgets, each with their own <label>, and distinct ID.
|
|
# The IDs are made distinct by y "_X" suffix, where X is the zero-based
|
|
# index of the choice field. Thus, the label for the main widget should
|
|
# reference the first subwidget, hence the "_0" suffix.
|
|
if id_:
|
|
id_ += '_0'
|
|
return id_
|
|
|
|
|
|
class RadioSelect(RendererMixin, Select):
|
|
renderer = RadioFieldRenderer
|
|
_empty_value = ''
|
|
|
|
|
|
class CheckboxSelectMultiple(RendererMixin, SelectMultiple):
|
|
renderer = CheckboxFieldRenderer
|
|
_empty_value = []
|
|
|
|
|
|
class MultiWidget(Widget):
|
|
"""
|
|
A widget that is composed of multiple widgets.
|
|
|
|
Its render() method is different than other widgets', because it has to
|
|
figure out how to split a single value for display in multiple widgets.
|
|
The ``value`` argument can be one of two things:
|
|
|
|
* A list.
|
|
* A normal value (e.g., a string) that has been "compressed" from
|
|
a list of values.
|
|
|
|
In the second case -- i.e., if the value is NOT a list -- render() will
|
|
first "decompress" the value into a list before rendering it. It does so by
|
|
calling the decompress() method, which MultiWidget subclasses must
|
|
implement. This method takes a single "compressed" value and returns a
|
|
list.
|
|
|
|
When render() does its HTML rendering, each value in the list is rendered
|
|
with the corresponding widget -- the first value is rendered in the first
|
|
widget, the second value is rendered in the second widget, etc.
|
|
|
|
Subclasses may implement format_output(), which takes the list of rendered
|
|
widgets and returns a string of HTML that formats them any way you'd like.
|
|
|
|
You'll probably want to use this class with MultiValueField.
|
|
"""
|
|
def __init__(self, widgets, attrs=None):
|
|
self.widgets = [w() if isinstance(w, type) else w for w in widgets]
|
|
super(MultiWidget, self).__init__(attrs)
|
|
|
|
def render(self, name, value, attrs=None):
|
|
if self.is_localized:
|
|
for widget in self.widgets:
|
|
widget.is_localized = self.is_localized
|
|
# value is a list of values, each corresponding to a widget
|
|
# in self.widgets.
|
|
if not isinstance(value, list):
|
|
value = self.decompress(value)
|
|
output = []
|
|
final_attrs = self.build_attrs(attrs)
|
|
id_ = final_attrs.get('id', None)
|
|
for i, widget in enumerate(self.widgets):
|
|
try:
|
|
widget_value = value[i]
|
|
except IndexError:
|
|
widget_value = None
|
|
if id_:
|
|
final_attrs = dict(final_attrs, id='%s_%s' % (id_, i))
|
|
output.append(widget.render(name + '_%s' % i, widget_value, final_attrs))
|
|
return mark_safe(self.format_output(output))
|
|
|
|
def id_for_label(self, id_):
|
|
# See the comment for RadioSelect.id_for_label()
|
|
if id_:
|
|
id_ += '_0'
|
|
return id_
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
return [widget.value_from_datadict(data, files, name + '_%s' % i) for i, widget in enumerate(self.widgets)]
|
|
|
|
def format_output(self, rendered_widgets):
|
|
"""
|
|
Given a list of rendered widgets (as strings), returns a Unicode string
|
|
representing the HTML for the whole lot.
|
|
|
|
This hook allows you to format the HTML design of the widgets, if
|
|
needed.
|
|
"""
|
|
return ''.join(rendered_widgets)
|
|
|
|
def decompress(self, value):
|
|
"""
|
|
Returns a list of decompressed values for the given compressed value.
|
|
The given value can be assumed to be valid, but not necessarily
|
|
non-empty.
|
|
"""
|
|
raise NotImplementedError('Subclasses must implement this method.')
|
|
|
|
def _get_media(self):
|
|
"Media for a multiwidget is the combination of all media of the subwidgets"
|
|
media = Media()
|
|
for w in self.widgets:
|
|
media = media + w.media
|
|
return media
|
|
media = property(_get_media)
|
|
|
|
def __deepcopy__(self, memo):
|
|
obj = super(MultiWidget, self).__deepcopy__(memo)
|
|
obj.widgets = copy.deepcopy(self.widgets)
|
|
return obj
|
|
|
|
@property
|
|
def needs_multipart_form(self):
|
|
return any(w.needs_multipart_form for w in self.widgets)
|
|
|
|
|
|
class SplitDateTimeWidget(MultiWidget):
|
|
"""
|
|
A Widget that splits datetime input into two <input type="text"> boxes.
|
|
"""
|
|
|
|
def __init__(self, attrs=None, date_format=None, time_format=None):
|
|
widgets = (DateInput(attrs=attrs, format=date_format),
|
|
TimeInput(attrs=attrs, format=time_format))
|
|
super(SplitDateTimeWidget, self).__init__(widgets, attrs)
|
|
|
|
def decompress(self, value):
|
|
if value:
|
|
value = to_current_timezone(value)
|
|
return [value.date(), value.time().replace(microsecond=0)]
|
|
return [None, None]
|
|
|
|
class SplitHiddenDateTimeWidget(SplitDateTimeWidget):
|
|
"""
|
|
A Widget that splits datetime input into two <input type="hidden"> inputs.
|
|
"""
|
|
is_hidden = True
|
|
|
|
def __init__(self, attrs=None, date_format=None, time_format=None):
|
|
super(SplitHiddenDateTimeWidget, self).__init__(attrs, date_format, time_format)
|
|
for widget in self.widgets:
|
|
widget.input_type = 'hidden'
|
|
widget.is_hidden = True
|