又一次合并
This commit is contained in:
ladeng07
@@ -0,0 +1,286 @@
|
||||
# -*- encoding: utf-8 -*-
|
||||
"""
|
||||
@File : widgets.py
|
||||
@Time : 2020/1/3 11:22
|
||||
@Author : chise
|
||||
@Email : chise123@live.com
|
||||
@Software: PyCharm
|
||||
@info :小部件
|
||||
"""
|
||||
import typing
|
||||
import copy
|
||||
import datetime
|
||||
import re
|
||||
import warnings
|
||||
from collections import defaultdict
|
||||
from itertools import chain
|
||||
|
||||
from django.conf import settings
|
||||
from django.forms.renderers import get_default_renderer
|
||||
from django.forms.utils import to_current_timezone
|
||||
from django.forms.widgets import media_property
|
||||
from django.templatetags.static import static
|
||||
from django.utils import datetime_safe, formats
|
||||
from django.utils.datastructures import OrderedSet
|
||||
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.topological_sort import (
|
||||
CyclicDependencyError, stable_topological_sort,
|
||||
)
|
||||
from django.utils.translation import gettext_lazy as _
|
||||
|
||||
__all__ = ('STextInput', 'SPasswordInput',
|
||||
'SURLInput', 'SEmailInput', 'SNumberInput',)
|
||||
|
||||
|
||||
class MediaDefiningClass(type):
|
||||
"""
|
||||
元类：媒体定义。
|
||||
"""
|
||||
|
||||
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 CWidget(metaclass=MediaDefiningClass):
|
||||
needs_multipart_form = False # 确定此小部件是否需要多部件表单
|
||||
is_localized = False
|
||||
is_required = False
|
||||
supports_microseconds = True
|
||||
bind_attr={}
|
||||
def __init__(self, attrs=None):
|
||||
self.attrs = {} if attrs is None else attrs.copy()
|
||||
|
||||
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):
|
||||
"""
|
||||
返回在模板中呈现时应该出现的值。
|
||||
"""
|
||||
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):
|
||||
"""将小部件呈现为HTML字符串。"""
|
||||
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_):
|
||||
"""
|
||||
给定字段的ID，返回此小部件的HTML ID属性，以供<label>使用。
|
||||
如果没有可用的ID，则返回None。
|
||||
这个钩子是必需的，因为一些小部件有多个HTML元素，因此有多个id。
|
||||
在这种情况下，这个方法应该返回一个ID值，该值对应于小部件标记中的第一个ID。
|
||||
"""
|
||||
return id_
|
||||
|
||||
def use_required_attribute(self, initial):
|
||||
return not self.is_hidden
|
||||
|
||||
def get_bind_attr(self, attrs=None):
|
||||
"""
|
||||
获取该控件需要绑定的变量参数
|
||||
:return:
|
||||
"""
|
||||
if not attrs:
|
||||
self.bind_attr={}
|
||||
return
|
||||
for key, value in attrs.items():
|
||||
if key[0] == ":":
|
||||
if isinstance(value, str):
|
||||
self.bind_attr[value] = ''
|
||||
elif isinstance(value, dict):
|
||||
for a, b in value.items():
|
||||
self.bind_attr[a] = b
|
||||
else:
|
||||
continue
|
||||
|
||||
class CInput(CWidget):
|
||||
"""
|
||||
Base class for all <input> widgets.
|
||||
"""
|
||||
input_type = None # Subclasses must define this.
|
||||
template_name = 'forms/widgets/input.html'
|
||||
flag = False
|
||||
|
||||
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']['flag'] = self.flag
|
||||
context['widget']['type'] = self.input_type
|
||||
return context
|
||||
|
||||
|
||||
class STextInput(CInput):
|
||||
input_type = "text"
|
||||
template_name = 'forms/widgets/text.html'
|
||||
|
||||
def __init__(self, attrs: typing.Union[typing.Dict[str, str], None] = None):
|
||||
self.get_bind_attr(attrs)
|
||||
if not attrs :
|
||||
attrs = {}
|
||||
attrs['style'] = "width:180px"
|
||||
else:
|
||||
if not attrs.get('style'):
|
||||
attrs['style'] = "width:180px "
|
||||
super().__init__(attrs)
|
||||
|
||||
|
||||
class SNumberInput(CInput):
|
||||
input_type = 'number'
|
||||
template_name = 'forms/widgets/number.html'
|
||||
def __init__(self, attrs: typing.Union[typing.Dict[str, str], None] = None):
|
||||
self.get_bind_attr(attrs)
|
||||
if not attrs:
|
||||
attrs = {}
|
||||
attrs['style'] = "width:180px"
|
||||
else:
|
||||
if not attrs.get('style'):
|
||||
attrs['style'] = "width:180px "
|
||||
super().__init__(attrs)
|
||||
|
||||
|
||||
class SEmailInput(CInput):
|
||||
input_type = 'email'
|
||||
template_name = 'forms/widgets/email.html'
|
||||
def __init__(self, attrs: typing.Union[typing.Dict[str, str], None] = None):
|
||||
self.get_bind_attr(attrs)
|
||||
if not attrs:
|
||||
attrs = {}
|
||||
attrs['style'] = "width:180px "
|
||||
else:
|
||||
if not attrs.get('style'):
|
||||
attrs['style'] = "width:180px "
|
||||
super().__init__(attrs)
|
||||
|
||||
class SURLInput(CInput):
|
||||
input_type = 'url'
|
||||
template_name = 'forms/widgets/url.html'
|
||||
def __init__(self, attrs: typing.Union[typing.Dict[str, str], None] = None):
|
||||
self.get_bind_attr(attrs)
|
||||
if not attrs:
|
||||
attrs = {}
|
||||
attrs['style'] = "width:180px"
|
||||
else:
|
||||
if not attrs.get('style'):
|
||||
attrs['style'] = "width:180px "
|
||||
super().__init__(attrs)
|
||||
|
||||
class SPasswordInput(CInput):
|
||||
input_type = 'password'
|
||||
template_name = 'forms/widgets/password.html'
|
||||
|
||||
def __init__(self, attrs: typing.Union[typing.Dict[str, str], None] = None,render_value=False):
|
||||
self.get_bind_attr(attrs)
|
||||
if not attrs:
|
||||
attrs = {}
|
||||
attrs['style'] = "width:180px"
|
||||
else:
|
||||
if not attrs.get('style'):
|
||||
attrs['style'] = "width:180px "
|
||||
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)
|
||||
# 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 SCheckboxInput(CInput):
|
||||
"""
|
||||
注意：如果是bool值，会导致渲染之后form表单无法提交该参数，所以要切换到原生的input-checkbox。如果value是有选项的值，再观察
|
||||
"""
|
||||
input_type = 'checkbox'
|
||||
template_name = 'forms/widgets/checkbox.html'
|
||||
|
||||
def __init__(self, attrs=None, check_test=None):
|
||||
super().__init__(attrs)
|
||||
# check_test是一个可调用的函数，它接受一个值，如果复选框被选中，它将返回True。
|
||||
self.check_test = boolean_check if check_test is None else check_test
|
||||
|
||||
def format_value(self, value):
|
||||
"""只有在value不为空时才返回'value'属性。"""
|
||||
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):
|
||||
attrs = {**(attrs or {}), '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):
|
||||
# 如果没有选中，HTML复选框不会出现在POST数据中，因此永远不知道该值是否实际上被省略了。
|
||||
return False
|
||||
Reference in New Issue
Block a user