1066 lines
36 KiB
Python
1066 lines
36 KiB
Python
"""
|
|
HTML Widget classes
|
|
"""
|
|
|
|
import copy
|
|
import datetime
|
|
import re
|
|
import warnings
|
|
from itertools import chain
|
|
|
|
from django.conf import settings
|
|
from django.forms.utils import to_current_timezone
|
|
from django.templatetags.static import static
|
|
from django.utils import datetime_safe, formats
|
|
from django.utils.dates import MONTHS
|
|
from django.utils.formats import get_format
|
|
from django.utils.html import format_html, html_safe
|
|
from django.utils.safestring import mark_safe
|
|
from django.utils.translation import gettext_lazy as _
|
|
|
|
from .renderers import get_default_renderer
|
|
|
|
__all__ = (
|
|
'Media', 'MediaDefiningClass', 'Widget', 'TextInput', 'NumberInput',
|
|
'EmailInput', 'URLInput', 'PasswordInput', 'HiddenInput',
|
|
'MultipleHiddenInput', 'FileInput', 'ClearableFileInput', 'Textarea',
|
|
'DateInput', 'DateTimeInput', 'TimeInput', 'CheckboxInput', 'Select',
|
|
'NullBooleanSelect', 'SelectMultiple', 'RadioSelect',
|
|
'CheckboxSelectMultiple', 'MultiWidget', 'SplitDateTimeWidget',
|
|
'SplitHiddenDateTimeWidget', 'SelectDateWidget',
|
|
)
|
|
|
|
MEDIA_TYPES = ('css', 'js')
|
|
|
|
|
|
class MediaOrderConflictWarning(RuntimeWarning):
|
|
pass
|
|
|
|
|
|
@html_safe
|
|
class Media:
|
|
def __init__(self, media=None, css=None, js=None):
|
|
if media is not None:
|
|
css = getattr(media, 'css', {})
|
|
js = getattr(media, 'js', [])
|
|
else:
|
|
if css is None:
|
|
css = {}
|
|
if js is None:
|
|
js = []
|
|
self._css = css
|
|
self._js = js
|
|
|
|
def __repr__(self):
|
|
return 'Media(css=%r, js=%r)' % (self._css, self._js)
|
|
|
|
def __str__(self):
|
|
return self.render()
|
|
|
|
def render(self):
|
|
return mark_safe('\n'.join(chain.from_iterable(getattr(self, 'render_' + name)() for name in MEDIA_TYPES)))
|
|
|
|
def render_js(self):
|
|
return [
|
|
format_html(
|
|
'<script type="text/javascript" src="{}"></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)
|
|
return chain.from_iterable([
|
|
format_html(
|
|
'<link href="{}" type="text/css" media="{}" rel="stylesheet" />',
|
|
self.absolute_path(path), medium
|
|
) for path in self._css[medium]
|
|
] for medium in media)
|
|
|
|
def absolute_path(self, path):
|
|
"""
|
|
Given a relative or absolute path to a static asset, return an absolute
|
|
path. An absolute path will be returned unchanged while a relative path
|
|
will be passed to django.templatetags.static.static().
|
|
"""
|
|
if path.startswith(('http://', 'https://', '/')):
|
|
return path
|
|
return static(path)
|
|
|
|
def __getitem__(self, name):
|
|
"""Return 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)
|
|
|
|
@staticmethod
|
|
def merge(list_1, list_2):
|
|
"""
|
|
Merge two lists while trying to keep the relative order of the elements.
|
|
Warn if the lists have the same two elements in a different relative
|
|
order.
|
|
|
|
For static assets it can be important to have them included in the DOM
|
|
in a certain order. In JavaScript you may not be able to reference a
|
|
global or in CSS you might want to override a style.
|
|
"""
|
|
# Start with a copy of list_1.
|
|
combined_list = list(list_1)
|
|
last_insert_index = len(list_1)
|
|
# Walk list_2 in reverse, inserting each element into combined_list if
|
|
# it doesn't already exist.
|
|
for path in reversed(list_2):
|
|
try:
|
|
# Does path already exist in the list?
|
|
index = combined_list.index(path)
|
|
except ValueError:
|
|
# Add path to combined_list since it doesn't exist.
|
|
combined_list.insert(last_insert_index, path)
|
|
else:
|
|
if index > last_insert_index:
|
|
warnings.warn(
|
|
'Detected duplicate Media files in an opposite order:\n'
|
|
'%s\n%s' % (combined_list[last_insert_index], combined_list[index]),
|
|
MediaOrderConflictWarning,
|
|
)
|
|
# path already exists in the list. Update last_insert_index so
|
|
# that the following elements are inserted in front of this one.
|
|
last_insert_index = index
|
|
return combined_list
|
|
|
|
def __add__(self, other):
|
|
combined = Media()
|
|
combined._js = self.merge(self._js, other._js)
|
|
combined._css = {
|
|
medium: self.merge(self._css.get(medium, []), other._css.get(medium, []))
|
|
for medium in self._css.keys() | other._css.keys()
|
|
}
|
|
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 is 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__(mcs, name, bases, attrs):
|
|
new_class = super(MediaDefiningClass, mcs).__new__(mcs, name, bases, attrs)
|
|
|
|
if 'media' not in attrs:
|
|
new_class.media = media_property(new_class)
|
|
|
|
return new_class
|
|
|
|
|
|
class Widget(metaclass=MediaDefiningClass):
|
|
needs_multipart_form = False # Determines does this widget need multipart form
|
|
is_localized = False
|
|
is_required = False
|
|
supports_microseconds = True
|
|
|
|
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
|
|
|
|
@property
|
|
def is_hidden(self):
|
|
return self.input_type == 'hidden' if hasattr(self, 'input_type') else False
|
|
|
|
def subwidgets(self, name, value, attrs=None):
|
|
context = self.get_context(name, value, attrs)
|
|
yield context['widget']
|
|
|
|
def format_value(self, value):
|
|
"""
|
|
Return a value as it should appear when rendered in a template.
|
|
"""
|
|
if value == '' or value is None:
|
|
return None
|
|
if self.is_localized:
|
|
return formats.localize_input(value)
|
|
return str(value)
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = {}
|
|
context['widget'] = {
|
|
'name': name,
|
|
'is_hidden': self.is_hidden,
|
|
'required': self.is_required,
|
|
'value': self.format_value(value),
|
|
'attrs': self.build_attrs(self.attrs, attrs),
|
|
'template_name': self.template_name,
|
|
}
|
|
return context
|
|
|
|
def render(self, name, value, attrs=None, renderer=None):
|
|
"""Render the widget as an HTML string."""
|
|
context = self.get_context(name, value, attrs)
|
|
return self._render(self.template_name, context, renderer)
|
|
|
|
def _render(self, template_name, context, renderer=None):
|
|
if renderer is None:
|
|
renderer = get_default_renderer()
|
|
return mark_safe(renderer.render(template_name, context))
|
|
|
|
def build_attrs(self, base_attrs, extra_attrs=None):
|
|
"""Build an attribute dictionary."""
|
|
return {**base_attrs, **(extra_attrs or {})}
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
"""
|
|
Given a dictionary of data and this widget's name, return the value
|
|
of this widget or None if it's not provided.
|
|
"""
|
|
return data.get(name)
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
return name not in data
|
|
|
|
def id_for_label(self, id_):
|
|
"""
|
|
Return the HTML ID attribute of this Widget for use by a <label>,
|
|
given the ID of the field. Return 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_
|
|
|
|
def use_required_attribute(self, initial):
|
|
return not self.is_hidden
|
|
|
|
|
|
class Input(Widget):
|
|
"""
|
|
Base class for all <input> widgets.
|
|
"""
|
|
input_type = None # Subclasses must define this.
|
|
template_name = 'django/forms/widgets/input.html'
|
|
|
|
def __init__(self, attrs=None):
|
|
if attrs is not None:
|
|
attrs = attrs.copy()
|
|
self.input_type = attrs.pop('type', self.input_type)
|
|
super().__init__(attrs)
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
context['widget']['type'] = self.input_type
|
|
return context
|
|
|
|
|
|
class TextInput(Input):
|
|
input_type = 'text'
|
|
template_name = 'django/forms/widgets/text.html'
|
|
|
|
|
|
class NumberInput(Input):
|
|
input_type = 'number'
|
|
template_name = 'django/forms/widgets/number.html'
|
|
|
|
|
|
class EmailInput(Input):
|
|
input_type = 'email'
|
|
template_name = 'django/forms/widgets/email.html'
|
|
|
|
|
|
class URLInput(Input):
|
|
input_type = 'url'
|
|
template_name = 'django/forms/widgets/url.html'
|
|
|
|
|
|
class PasswordInput(Input):
|
|
input_type = 'password'
|
|
template_name = 'django/forms/widgets/password.html'
|
|
|
|
def __init__(self, attrs=None, render_value=False):
|
|
super().__init__(attrs)
|
|
self.render_value = render_value
|
|
|
|
def get_context(self, name, value, attrs):
|
|
if not self.render_value:
|
|
value = None
|
|
return super().get_context(name, value, attrs)
|
|
|
|
|
|
class HiddenInput(Input):
|
|
input_type = 'hidden'
|
|
template_name = 'django/forms/widgets/hidden.html'
|
|
|
|
|
|
class MultipleHiddenInput(HiddenInput):
|
|
"""
|
|
Handle <input type="hidden"> for fields that have a list
|
|
of values.
|
|
"""
|
|
template_name = 'django/forms/widgets/multiple_hidden.html'
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
final_attrs = context['widget']['attrs']
|
|
id_ = context['widget']['attrs'].get('id')
|
|
|
|
subwidgets = []
|
|
for index, value_ in enumerate(context['widget']['value']):
|
|
widget_attrs = final_attrs.copy()
|
|
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.
|
|
widget_attrs['id'] = '%s_%s' % (id_, index)
|
|
widget = HiddenInput()
|
|
widget.is_required = self.is_required
|
|
subwidgets.append(widget.get_context(name, value_, widget_attrs)['widget'])
|
|
|
|
context['widget']['subwidgets'] = subwidgets
|
|
return context
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
try:
|
|
getter = data.getlist
|
|
except AttributeError:
|
|
getter = data.get
|
|
return getter(name)
|
|
|
|
def format_value(self, value):
|
|
return [] if value is None else value
|
|
|
|
|
|
class FileInput(Input):
|
|
input_type = 'file'
|
|
needs_multipart_form = True
|
|
template_name = 'django/forms/widgets/file.html'
|
|
|
|
def format_value(self, value):
|
|
"""File input never renders a value."""
|
|
return
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
"File widgets take data from FILES, not POST"
|
|
return files.get(name)
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
return name not in files
|
|
|
|
|
|
FILE_INPUT_CONTRADICTION = object()
|
|
|
|
|
|
class ClearableFileInput(FileInput):
|
|
clear_checkbox_label = _('Clear')
|
|
initial_text = _('Currently')
|
|
input_text = _('Change')
|
|
template_name = 'django/forms/widgets/clearable_file_input.html'
|
|
|
|
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 is_initial(self, value):
|
|
"""
|
|
Return whether value is considered to be initial value.
|
|
"""
|
|
return bool(value and getattr(value, 'url', False))
|
|
|
|
def format_value(self, value):
|
|
"""
|
|
Return the file object if it has a defined url attribute.
|
|
"""
|
|
if self.is_initial(value):
|
|
return value
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
checkbox_name = self.clear_checkbox_name(name)
|
|
checkbox_id = self.clear_checkbox_id(checkbox_name)
|
|
context['widget'].update({
|
|
'checkbox_name': checkbox_name,
|
|
'checkbox_id': checkbox_id,
|
|
'is_initial': self.is_initial(value),
|
|
'input_text': self.input_text,
|
|
'initial_text': self.initial_text,
|
|
'clear_checkbox_label': self.clear_checkbox_label,
|
|
})
|
|
return context
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
upload = super().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
|
|
|
|
def use_required_attribute(self, initial):
|
|
return super().use_required_attribute(initial) and not initial
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
return (
|
|
super().value_omitted_from_data(data, files, name) and
|
|
self.clear_checkbox_name(name) not in data
|
|
)
|
|
|
|
|
|
class Textarea(Widget):
|
|
template_name = 'django/forms/widgets/textarea.html'
|
|
|
|
def __init__(self, attrs=None):
|
|
# Use slightly better defaults than HTML's 20x2 box
|
|
default_attrs = {'cols': '40', 'rows': '10'}
|
|
if attrs:
|
|
default_attrs.update(attrs)
|
|
super().__init__(default_attrs)
|
|
|
|
|
|
class DateTimeBaseInput(TextInput):
|
|
format_key = ''
|
|
supports_microseconds = False
|
|
|
|
def __init__(self, attrs=None, format=None):
|
|
super().__init__(attrs)
|
|
self.format = format or None
|
|
|
|
def format_value(self, value):
|
|
return formats.localize_input(value, self.format or formats.get_format(self.format_key)[0])
|
|
|
|
|
|
class DateInput(DateTimeBaseInput):
|
|
format_key = 'DATE_INPUT_FORMATS'
|
|
template_name = 'django/forms/widgets/date.html'
|
|
|
|
|
|
class DateTimeInput(DateTimeBaseInput):
|
|
format_key = 'DATETIME_INPUT_FORMATS'
|
|
template_name = 'django/forms/widgets/datetime.html'
|
|
|
|
|
|
class TimeInput(DateTimeBaseInput):
|
|
format_key = 'TIME_INPUT_FORMATS'
|
|
template_name = 'django/forms/widgets/time.html'
|
|
|
|
|
|
# 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(Input):
|
|
input_type = 'checkbox'
|
|
template_name = 'django/forms/widgets/checkbox.html'
|
|
|
|
def __init__(self, attrs=None, check_test=None):
|
|
super().__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 format_value(self, value):
|
|
"""Only return the 'value' attribute if value isn't empty."""
|
|
if value is True or value is False or value is None or value == '':
|
|
return
|
|
return str(value)
|
|
|
|
def get_context(self, name, value, attrs):
|
|
if self.check_test(value):
|
|
if attrs is None:
|
|
attrs = {}
|
|
attrs['checked'] = True
|
|
return super().get_context(name, value, 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, str):
|
|
value = values.get(value.lower(), value)
|
|
return bool(value)
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
# HTML checkboxes don't appear in POST data if not checked, so it's
|
|
# never known if the value is actually omitted.
|
|
return False
|
|
|
|
|
|
class ChoiceWidget(Widget):
|
|
allow_multiple_selected = False
|
|
input_type = None
|
|
template_name = None
|
|
option_template_name = None
|
|
add_id_index = True
|
|
checked_attribute = {'checked': True}
|
|
option_inherits_attrs = True
|
|
|
|
def __init__(self, attrs=None, choices=()):
|
|
super().__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 __deepcopy__(self, memo):
|
|
obj = copy.copy(self)
|
|
obj.attrs = self.attrs.copy()
|
|
obj.choices = copy.copy(self.choices)
|
|
memo[id(self)] = obj
|
|
return obj
|
|
|
|
def subwidgets(self, name, value, attrs=None):
|
|
"""
|
|
Yield all "subwidgets" of this widget. Used to enable iterating
|
|
options from a BoundField for choice widgets.
|
|
"""
|
|
value = self.format_value(value)
|
|
yield from self.options(name, value, attrs)
|
|
|
|
def options(self, name, value, attrs=None):
|
|
"""Yield a flat list of options for this widgets."""
|
|
for group in self.optgroups(name, value, attrs):
|
|
yield from group[1]
|
|
|
|
def optgroups(self, name, value, attrs=None):
|
|
"""Return a list of optgroups for this widget."""
|
|
groups = []
|
|
has_selected = False
|
|
|
|
for index, (option_value, option_label) in enumerate(self.choices):
|
|
if option_value is None:
|
|
option_value = ''
|
|
|
|
subgroup = []
|
|
if isinstance(option_label, (list, tuple)):
|
|
group_name = option_value
|
|
subindex = 0
|
|
choices = option_label
|
|
else:
|
|
group_name = None
|
|
subindex = None
|
|
choices = [(option_value, option_label)]
|
|
groups.append((group_name, subgroup, index))
|
|
|
|
for subvalue, sublabel in choices:
|
|
selected = (
|
|
str(subvalue) in value and
|
|
(not has_selected or self.allow_multiple_selected)
|
|
)
|
|
has_selected |= selected
|
|
subgroup.append(self.create_option(
|
|
name, subvalue, sublabel, selected, index,
|
|
subindex=subindex, attrs=attrs,
|
|
))
|
|
if subindex is not None:
|
|
subindex += 1
|
|
return groups
|
|
|
|
def create_option(self, name, value, label, selected, index, subindex=None, attrs=None):
|
|
index = str(index) if subindex is None else "%s_%s" % (index, subindex)
|
|
if attrs is None:
|
|
attrs = {}
|
|
option_attrs = self.build_attrs(self.attrs, attrs) if self.option_inherits_attrs else {}
|
|
if selected:
|
|
option_attrs.update(self.checked_attribute)
|
|
if 'id' in option_attrs:
|
|
option_attrs['id'] = self.id_for_label(option_attrs['id'], index)
|
|
return {
|
|
'name': name,
|
|
'value': value,
|
|
'label': label,
|
|
'selected': selected,
|
|
'index': index,
|
|
'attrs': option_attrs,
|
|
'type': self.input_type,
|
|
'template_name': self.option_template_name,
|
|
}
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
context['widget']['optgroups'] = self.optgroups(name, context['widget']['value'], attrs)
|
|
context['wrap_label'] = True
|
|
return context
|
|
|
|
def id_for_label(self, id_, index='0'):
|
|
"""
|
|
Use an incremented id for each option where the main widget
|
|
references the zero index.
|
|
"""
|
|
if id_ and self.add_id_index:
|
|
id_ = '%s_%s' % (id_, index)
|
|
return id_
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
getter = data.get
|
|
if self.allow_multiple_selected:
|
|
try:
|
|
getter = data.getlist
|
|
except AttributeError:
|
|
pass
|
|
return getter(name)
|
|
|
|
def format_value(self, value):
|
|
"""Return selected values as a list."""
|
|
if not isinstance(value, (tuple, list)):
|
|
value = [value]
|
|
return [str(v) if v is not None else '' for v in value]
|
|
|
|
|
|
class Select(ChoiceWidget):
|
|
input_type = 'select'
|
|
template_name = 'django/forms/widgets/select.html'
|
|
option_template_name = 'django/forms/widgets/select_option.html'
|
|
add_id_index = False
|
|
checked_attribute = {'selected': True}
|
|
option_inherits_attrs = False
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
if self.allow_multiple_selected:
|
|
context['widget']['attrs']['multiple'] = 'multiple'
|
|
return context
|
|
|
|
@staticmethod
|
|
def _choice_has_empty_value(choice):
|
|
"""Return True if the choice's value is empty string or None."""
|
|
value, _ = choice
|
|
return value is None or value == ''
|
|
|
|
def use_required_attribute(self, initial):
|
|
"""
|
|
Don't render 'required' if the first <option> has a value, as that's
|
|
invalid HTML.
|
|
"""
|
|
use_required_attribute = super().use_required_attribute(initial)
|
|
# 'required' is always okay for <select multiple>.
|
|
if self.allow_multiple_selected:
|
|
return use_required_attribute
|
|
|
|
first_choice = next(iter(self.choices), None)
|
|
return use_required_attribute and first_choice is not None and self._choice_has_empty_value(first_choice)
|
|
|
|
|
|
class NullBooleanSelect(Select):
|
|
"""
|
|
A Select Widget intended to be used with NullBooleanField.
|
|
"""
|
|
def __init__(self, attrs=None):
|
|
choices = (
|
|
('1', _('Unknown')),
|
|
('2', _('Yes')),
|
|
('3', _('No')),
|
|
)
|
|
super().__init__(attrs, choices)
|
|
|
|
def format_value(self, value):
|
|
try:
|
|
return {True: '2', False: '3', '2': '2', '3': '3'}[value]
|
|
except KeyError:
|
|
return '1'
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
value = data.get(name)
|
|
return {
|
|
'2': True,
|
|
True: True,
|
|
'True': True,
|
|
'3': False,
|
|
'False': False,
|
|
False: False,
|
|
}.get(value)
|
|
|
|
|
|
class SelectMultiple(Select):
|
|
allow_multiple_selected = True
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
try:
|
|
getter = data.getlist
|
|
except AttributeError:
|
|
getter = data.get
|
|
return getter(name)
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
# An unselected <select multiple> doesn't appear in POST data, so it's
|
|
# never known if the value is actually omitted.
|
|
return False
|
|
|
|
|
|
class RadioSelect(ChoiceWidget):
|
|
input_type = 'radio'
|
|
template_name = 'django/forms/widgets/radio.html'
|
|
option_template_name = 'django/forms/widgets/radio_option.html'
|
|
|
|
|
|
class CheckboxSelectMultiple(ChoiceWidget):
|
|
allow_multiple_selected = True
|
|
input_type = 'checkbox'
|
|
template_name = 'django/forms/widgets/checkbox_select.html'
|
|
option_template_name = 'django/forms/widgets/checkbox_option.html'
|
|
|
|
def use_required_attribute(self, initial):
|
|
# Don't use the 'required' attribute because browser validation would
|
|
# require all checkboxes to be checked instead of at least one.
|
|
return False
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
# HTML checkboxes don't appear in POST data if not checked, so it's
|
|
# never known if the value is actually omitted.
|
|
return False
|
|
|
|
def id_for_label(self, id_, index=None):
|
|
""""
|
|
Don't include for="field_0" in <label> because clicking such a label
|
|
would toggle the first checkbox.
|
|
"""
|
|
if index is None:
|
|
return ''
|
|
return super().id_for_label(id_, index)
|
|
|
|
|
|
class MultiWidget(Widget):
|
|
"""
|
|
A widget that is composed of multiple widgets.
|
|
|
|
In addition to the values added by Widget.get_context(), this widget
|
|
adds a list of subwidgets to the context as widget['subwidgets'].
|
|
These can be looped over and rendered like normal widgets.
|
|
|
|
You'll probably want to use this class with MultiValueField.
|
|
"""
|
|
template_name = 'django/forms/widgets/multiwidget.html'
|
|
|
|
def __init__(self, widgets, attrs=None):
|
|
self.widgets = [w() if isinstance(w, type) else w for w in widgets]
|
|
super().__init__(attrs)
|
|
|
|
@property
|
|
def is_hidden(self):
|
|
return all(w.is_hidden for w in self.widgets)
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
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)
|
|
|
|
final_attrs = context['widget']['attrs']
|
|
input_type = final_attrs.pop('type', None)
|
|
id_ = final_attrs.get('id')
|
|
subwidgets = []
|
|
for i, widget in enumerate(self.widgets):
|
|
if input_type is not None:
|
|
widget.input_type = input_type
|
|
widget_name = '%s_%s' % (name, i)
|
|
try:
|
|
widget_value = value[i]
|
|
except IndexError:
|
|
widget_value = None
|
|
if id_:
|
|
widget_attrs = final_attrs.copy()
|
|
widget_attrs['id'] = '%s_%s' % (id_, i)
|
|
else:
|
|
widget_attrs = final_attrs
|
|
subwidgets.append(widget.get_context(widget_name, widget_value, widget_attrs)['widget'])
|
|
context['widget']['subwidgets'] = subwidgets
|
|
return context
|
|
|
|
def id_for_label(self, id_):
|
|
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 value_omitted_from_data(self, data, files, name):
|
|
return all(
|
|
widget.value_omitted_from_data(data, files, name + '_%s' % i)
|
|
for i, widget in enumerate(self.widgets)
|
|
)
|
|
|
|
def decompress(self, value):
|
|
"""
|
|
Return 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().__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.
|
|
"""
|
|
supports_microseconds = False
|
|
template_name = 'django/forms/widgets/splitdatetime.html'
|
|
|
|
def __init__(self, attrs=None, date_format=None, time_format=None, date_attrs=None, time_attrs=None):
|
|
widgets = (
|
|
DateInput(
|
|
attrs=attrs if date_attrs is None else date_attrs,
|
|
format=date_format,
|
|
),
|
|
TimeInput(
|
|
attrs=attrs if time_attrs is None else time_attrs,
|
|
format=time_format,
|
|
),
|
|
)
|
|
super().__init__(widgets)
|
|
|
|
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.
|
|
"""
|
|
template_name = 'django/forms/widgets/splithiddendatetime.html'
|
|
|
|
def __init__(self, attrs=None, date_format=None, time_format=None, date_attrs=None, time_attrs=None):
|
|
super().__init__(attrs, date_format, time_format, date_attrs, time_attrs)
|
|
for widget in self.widgets:
|
|
widget.input_type = 'hidden'
|
|
|
|
|
|
class SelectDateWidget(Widget):
|
|
"""
|
|
A widget that splits date input into three <select> boxes.
|
|
|
|
This also serves as an example of a Widget that has more than one HTML
|
|
element and hence implements value_from_datadict.
|
|
"""
|
|
none_value = (0, '---')
|
|
month_field = '%s_month'
|
|
day_field = '%s_day'
|
|
year_field = '%s_year'
|
|
template_name = 'django/forms/widgets/select_date.html'
|
|
input_type = 'select'
|
|
select_widget = Select
|
|
date_re = re.compile(r'(\d{4}|0)-(\d\d?)-(\d\d?)$')
|
|
|
|
def __init__(self, attrs=None, years=None, months=None, empty_label=None):
|
|
self.attrs = attrs or {}
|
|
|
|
# Optional list or tuple of years to use in the "year" select box.
|
|
if years:
|
|
self.years = years
|
|
else:
|
|
this_year = datetime.date.today().year
|
|
self.years = range(this_year, this_year + 10)
|
|
|
|
# Optional dict of months to use in the "month" select box.
|
|
if months:
|
|
self.months = months
|
|
else:
|
|
self.months = MONTHS
|
|
|
|
# Optional string, list, or tuple to use as empty_label.
|
|
if isinstance(empty_label, (list, tuple)):
|
|
if not len(empty_label) == 3:
|
|
raise ValueError('empty_label list/tuple must have 3 elements.')
|
|
|
|
self.year_none_value = (0, empty_label[0])
|
|
self.month_none_value = (0, empty_label[1])
|
|
self.day_none_value = (0, empty_label[2])
|
|
else:
|
|
if empty_label is not None:
|
|
self.none_value = (0, empty_label)
|
|
|
|
self.year_none_value = self.none_value
|
|
self.month_none_value = self.none_value
|
|
self.day_none_value = self.none_value
|
|
|
|
def get_context(self, name, value, attrs):
|
|
context = super().get_context(name, value, attrs)
|
|
date_context = {}
|
|
year_choices = [(i, str(i)) for i in self.years]
|
|
if not self.is_required:
|
|
year_choices.insert(0, self.year_none_value)
|
|
year_attrs = context['widget']['attrs'].copy()
|
|
year_name = self.year_field % name
|
|
year_attrs['id'] = 'id_%s' % year_name
|
|
date_context['year'] = self.select_widget(attrs, choices=year_choices).get_context(
|
|
name=year_name,
|
|
value=context['widget']['value']['year'],
|
|
attrs=year_attrs,
|
|
)
|
|
month_choices = list(self.months.items())
|
|
if not self.is_required:
|
|
month_choices.insert(0, self.month_none_value)
|
|
month_attrs = context['widget']['attrs'].copy()
|
|
month_name = self.month_field % name
|
|
month_attrs['id'] = 'id_%s' % month_name
|
|
date_context['month'] = self.select_widget(attrs, choices=month_choices).get_context(
|
|
name=month_name,
|
|
value=context['widget']['value']['month'],
|
|
attrs=month_attrs,
|
|
)
|
|
day_choices = [(i, i) for i in range(1, 32)]
|
|
if not self.is_required:
|
|
day_choices.insert(0, self.day_none_value)
|
|
day_attrs = context['widget']['attrs'].copy()
|
|
day_name = self.day_field % name
|
|
day_attrs['id'] = 'id_%s' % day_name
|
|
date_context['day'] = self.select_widget(attrs, choices=day_choices,).get_context(
|
|
name=day_name,
|
|
value=context['widget']['value']['day'],
|
|
attrs=day_attrs,
|
|
)
|
|
subwidgets = []
|
|
for field in self._parse_date_fmt():
|
|
subwidgets.append(date_context[field]['widget'])
|
|
context['widget']['subwidgets'] = subwidgets
|
|
return context
|
|
|
|
def format_value(self, value):
|
|
"""
|
|
Return a dict containing the year, month, and day of the current value.
|
|
Use dict instead of a datetime to allow invalid dates such as February
|
|
31 to display correctly.
|
|
"""
|
|
year, month, day = None, None, None
|
|
if isinstance(value, (datetime.date, datetime.datetime)):
|
|
year, month, day = value.year, value.month, value.day
|
|
elif isinstance(value, str):
|
|
if settings.USE_L10N:
|
|
input_format = get_format('DATE_INPUT_FORMATS')[0]
|
|
try:
|
|
d = datetime.datetime.strptime(value, input_format)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
year, month, day = d.year, d.month, d.day
|
|
match = self.date_re.match(value)
|
|
if match:
|
|
year, month, day = [int(val) for val in match.groups()]
|
|
return {'year': year, 'month': month, 'day': day}
|
|
|
|
@staticmethod
|
|
def _parse_date_fmt():
|
|
fmt = get_format('DATE_FORMAT')
|
|
escaped = False
|
|
for char in fmt:
|
|
if escaped:
|
|
escaped = False
|
|
elif char == '\\':
|
|
escaped = True
|
|
elif char in 'Yy':
|
|
yield 'year'
|
|
elif char in 'bEFMmNn':
|
|
yield 'month'
|
|
elif char in 'dj':
|
|
yield 'day'
|
|
|
|
def id_for_label(self, id_):
|
|
for first_select in self._parse_date_fmt():
|
|
return '%s_%s' % (id_, first_select)
|
|
return '%s_month' % id_
|
|
|
|
def value_from_datadict(self, data, files, name):
|
|
y = data.get(self.year_field % name)
|
|
m = data.get(self.month_field % name)
|
|
d = data.get(self.day_field % name)
|
|
if y == m == d == "0":
|
|
return None
|
|
if y and m and d:
|
|
if settings.USE_L10N:
|
|
input_format = get_format('DATE_INPUT_FORMATS')[0]
|
|
try:
|
|
date_value = datetime.date(int(y), int(m), int(d))
|
|
except ValueError:
|
|
return '%s-%s-%s' % (y, m, d)
|
|
else:
|
|
date_value = datetime_safe.new_date(date_value)
|
|
return date_value.strftime(input_format)
|
|
else:
|
|
return '%s-%s-%s' % (y, m, d)
|
|
return data.get(name)
|
|
|
|
def value_omitted_from_data(self, data, files, name):
|
|
return not any(
|
|
('{}_{}'.format(name, interval) in data)
|
|
for interval in ('year', 'month', 'day')
|
|
)
|