/usr/lib/python3/dist-packages/crispy_forms/helper.py is in python3-django-crispy-forms 1.7.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 | # -*- coding: utf-8 -*-
import re
from django.utils.safestring import mark_safe
from crispy_forms.compatibility import string_types
from crispy_forms.exceptions import FormHelpersException
from crispy_forms.layout import Layout
from crispy_forms.layout_slice import LayoutSlice
from crispy_forms.utils import (
TEMPLATE_PACK, flatatt, list_difference, list_intersection, render_field,
)
try:
from django.urls import reverse, NoReverseMatch
except ImportError:
# Django < 1.10
from django.core.urlresolvers import reverse, NoReverseMatch
class DynamicLayoutHandler(object):
def _check_layout(self):
if self.layout is None:
raise FormHelpersException("You need to set a layout in your FormHelper")
def _check_layout_and_form(self):
self._check_layout()
if self.form is None:
raise FormHelpersException("You need to pass a form instance to your FormHelper")
def all(self):
"""
Returns all layout objects of first level of depth
"""
self._check_layout()
return LayoutSlice(self.layout, slice(0, len(self.layout.fields), 1))
def filter(self, *LayoutClasses, **kwargs):
"""
Returns a LayoutSlice pointing to layout objects of type `LayoutClass`
"""
self._check_layout()
max_level = kwargs.pop('max_level', 0)
greedy = kwargs.pop('greedy', False)
filtered_layout_objects = self.layout.get_layout_objects(LayoutClasses, max_level=max_level, greedy=greedy)
return LayoutSlice(self.layout, filtered_layout_objects)
def filter_by_widget(self, widget_type):
"""
Returns a LayoutSlice pointing to fields with widgets of `widget_type`
"""
self._check_layout_and_form()
layout_field_names = self.layout.get_field_names()
# Let's filter all fields with widgets like widget_type
filtered_fields = []
for pointer in layout_field_names:
if isinstance(self.form.fields[pointer[1]].widget, widget_type):
filtered_fields.append(pointer)
return LayoutSlice(self.layout, filtered_fields)
def exclude_by_widget(self, widget_type):
"""
Returns a LayoutSlice pointing to fields with widgets NOT matching `widget_type`
"""
self._check_layout_and_form()
layout_field_names = self.layout.get_field_names()
# Let's exclude all fields with widgets like widget_type
filtered_fields = []
for pointer in layout_field_names:
if not isinstance(self.form.fields[pointer[1]].widget, widget_type):
filtered_fields.append(pointer)
return LayoutSlice(self.layout, filtered_fields)
def __getitem__(self, key):
"""
Return a LayoutSlice that makes changes affect the current instance of the layout
and not a copy.
"""
# when key is a string containing the field name
if isinstance(key, string_types):
# Django templates access FormHelper attributes using dictionary [] operator
# This could be a helper['form_id'] access, not looking for a field
if hasattr(self, key):
return getattr(self, key)
self._check_layout()
layout_field_names = self.layout.get_field_names()
filtered_field = []
for pointer in layout_field_names:
# There can be an empty pointer
if len(pointer) == 2 and pointer[1] == key:
filtered_field.append(pointer)
return LayoutSlice(self.layout, filtered_field)
return LayoutSlice(self.layout, key)
def __setitem__(self, key, value):
self.layout[key] = value
def __delitem__(self, key):
del self.layout.fields[key]
def __len__(self):
if self.layout is not None:
return len(self.layout.fields)
else:
return 0
class FormHelper(DynamicLayoutHandler):
"""
This class controls the form rendering behavior of the form passed to
the `{% crispy %}` tag. For doing so you will need to set its attributes
and pass the corresponding helper object to the tag::
{% crispy form form.helper %}
Let's see what attributes you can set and what form behaviors they apply to:
**form_method**: Specifies form method attribute.
You can see it to 'POST' or 'GET'. Defaults to 'POST'
**form_action**: Applied to the form action attribute:
- Can be a named url in your URLconf that can be executed via the `{% url %}` template tag. \
Example: 'show_my_profile'. In your URLconf you could have something like::
url(r'^show/profile/$', 'show_my_profile_view', name = 'show_my_profile')
- It can simply point to a URL '/whatever/blabla/'.
**form_id**: Generates a form id for dom identification.
If no id provided then no id attribute is created on the form.
**form_class**: String containing separated CSS classes to be applied
to form class attribute. The form will always have by default
'uniForm' class.
**form_group_wrapper_class**: String containing separated CSS classes to be applied
to each row of inputs.
**form_tag**: It specifies if <form></form> tags should be rendered when using a Layout.
If set to False it renders the form without the <form></form> tags. Defaults to True.
**form_error_title**: If a form has `non_field_errors` to display, they
are rendered in a div. You can set title's div with this attribute.
Example: "Oooops!" or "Form Errors"
**formset_error_title**: If a formset has `non_form_errors` to display, they
are rendered in a div. You can set title's div with this attribute.
**form_style**: Uni-form has two built in different form styles. You can choose
your favorite. This can be set to "default" or "inline". Defaults to "default".
**include_media**: Whether to automatically include form media. Set to False if
you want to manually include form media outside the form. Defaults to True.
Public Methods:
**add_input(input)**: You can add input buttons using this method. Inputs
added using this method will be rendered at the end of the form/formset.
**add_layout(layout)**: You can add a `Layout` object to `FormHelper`. The Layout
specifies in a simple, clean and DRY way how the form fields should be rendered.
You can wrap fields, order them, customize pretty much anything in the form.
Best way to add a helper to a form is adding a property named helper to the form
that returns customized `FormHelper` object::
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Submit
class MyForm(forms.Form):
title = forms.CharField(_("Title"))
@property
def helper(self):
helper = FormHelper()
helper.form_id = 'this-form-rocks'
helper.form_class = 'search'
helper.add_input(Submit('save', 'save'))
[...]
return helper
You can use it in a template doing::
{% load crispy_forms_tags %}
{% crispy form %}
"""
_form_method = 'post'
_form_action = ''
_form_style = 'default'
form = None
form_id = ''
form_class = ''
form_group_wrapper_class = ''
layout = None
form_tag = True
form_error_title = None
formset_error_title = None
form_show_errors = True
render_unmentioned_fields = False
render_hidden_fields = False
render_required_fields = False
_help_text_inline = False
_error_text_inline = True
html5_required = False
form_show_labels = True
template = None
field_template = None
disable_csrf = False
label_class = ''
field_class = ''
include_media = True
def __init__(self, form=None):
self.attrs = {}
self.inputs = []
if form is not None:
self.form = form
self.layout = self.build_default_layout(form)
def build_default_layout(self, form):
return Layout(*form.fields.keys())
@property
def form_method(self):
return self._form_method
@form_method.setter
def form_method(self, method):
if method.lower() not in ('get', 'post'):
raise FormHelpersException('Only GET and POST are valid in the \
form_method helper attribute')
self._form_method = method.lower()
@property
def form_action(self):
try:
return reverse(self._form_action)
except NoReverseMatch:
return self._form_action
@form_action.setter
def form_action(self, action):
self._form_action = action
@property
def form_style(self):
if self._form_style == "default":
return ''
if self._form_style == "inline":
return 'inlineLabels'
@form_style.setter
def form_style(self, style):
if style.lower() not in ('default', 'inline'):
raise FormHelpersException('Only default and inline are valid in the \
form_style helper attribute')
self._form_style = style.lower()
@property
def help_text_inline(self):
return self._help_text_inline
@help_text_inline.setter
def help_text_inline(self, flag):
self._help_text_inline = flag
self._error_text_inline = not flag
@property
def error_text_inline(self):
return self._error_text_inline
@error_text_inline.setter
def error_text_inline(self, flag):
self._error_text_inline = flag
self._help_text_inline = not flag
def add_input(self, input_object):
self.inputs.append(input_object)
def add_layout(self, layout):
self.layout = layout
def render_layout(self, form, context, template_pack=TEMPLATE_PACK):
"""
Returns safe html of the rendering of the layout
"""
form.rendered_fields = set()
form.crispy_field_template = self.field_template
# This renders the specified Layout strictly
html = self.layout.render(
form,
self.form_style,
context,
template_pack=template_pack
)
# Rendering some extra fields if specified
if self.render_unmentioned_fields or self.render_hidden_fields or self.render_required_fields:
fields = set(form.fields.keys())
left_fields_to_render = fields - form.rendered_fields
for field in left_fields_to_render:
if (
self.render_unmentioned_fields or
self.render_hidden_fields and form.fields[field].widget.is_hidden or
self.render_required_fields and form.fields[field].widget.is_required
):
html += render_field(
field,
form,
self.form_style,
context,
template_pack=template_pack
)
# If the user has Meta.fields defined, not included in the layout,
# we suppose they need to be rendered
if hasattr(form, 'Meta'):
if hasattr(form.Meta, 'fields'):
current_fields = tuple(getattr(form, 'fields', {}).keys())
meta_fields = getattr(form.Meta, 'fields')
fields_to_render = list_intersection(current_fields, meta_fields)
left_fields_to_render = list_difference(fields_to_render, form.rendered_fields)
for field in left_fields_to_render:
# We still respect the configuration of the helper
# regarding which fields to render
if (
self.render_unmentioned_fields or
(self.render_hidden_fields and
form.fields[field].widget.is_hidden) or
(self.render_required_fields and
form.fields[field].widget.is_required)
):
html += render_field(field, form, self.form_style, context)
return mark_safe(html)
def get_attributes(self, template_pack=TEMPLATE_PACK):
"""
Used by crispy_forms_tags to get helper attributes
"""
items = {
'form_method': self.form_method.strip(),
'form_tag': self.form_tag,
'form_style': self.form_style.strip(),
'form_show_errors': self.form_show_errors,
'help_text_inline': self.help_text_inline,
'error_text_inline': self.error_text_inline,
'html5_required': self.html5_required,
'form_show_labels': self.form_show_labels,
'disable_csrf': self.disable_csrf,
'label_class': self.label_class,
'field_class': self.field_class,
'include_media': self.include_media
}
bootstrap_size_match = re.findall('col-(lg|md|sm|xs)-(\d+)', self.label_class)
if bootstrap_size_match:
items['bootstrap_checkbox_offsets'] = ['col-%s-offset-%s' % m for m in bootstrap_size_match]
items['attrs'] = {}
if self.attrs:
items['attrs'] = self.attrs.copy()
if self.form_action:
items['attrs']['action'] = self.form_action.strip()
if self.form_id:
items['attrs']['id'] = self.form_id.strip()
if self.form_class:
# uni_form TEMPLATE PACK has a uniForm class by default
if template_pack == 'uni_form':
items['attrs']['class'] = "uniForm %s" % self.form_class.strip()
else:
items['attrs']['class'] = self.form_class.strip()
else:
if template_pack == 'uni_form':
items['attrs']['class'] = self.attrs.get('class', '') + " uniForm"
if self.form_group_wrapper_class:
items['attrs']['form_group_wrapper_class'] = self.form_group_wrapper_class
items['flat_attrs'] = flatatt(items['attrs'])
if self.inputs:
items['inputs'] = self.inputs
if self.form_error_title:
items['form_error_title'] = self.form_error_title.strip()
if self.formset_error_title:
items['formset_error_title'] = self.formset_error_title.strip()
for attribute_name, value in self.__dict__.items():
if attribute_name not in items and attribute_name not in ['layout', 'inputs'] and not attribute_name.startswith('_'):
items[attribute_name] = value
return items
|