forked from django-cms/django-cms
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placeholdermodel.py
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placeholdermodel.py
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# -*- coding: utf-8 -*-
from cms.utils import get_cms_setting
from cms.utils.compat.dj import python_2_unicode_compatible
from cms.utils.helpers import reversion_register
from cms.utils.i18n import get_language_object
from cms.utils.placeholder import PlaceholderNoAction, get_placeholder_conf
from django.core.urlresolvers import reverse
from django.db import models
from django.forms.widgets import Media
from django.template.defaultfilters import title
from django.utils.encoding import force_text
from django.utils.timezone import get_current_timezone_name
from django.utils.translation import ugettext_lazy as _
from django.conf import settings
import operator
from django.contrib import admin
@python_2_unicode_compatible
class Placeholder(models.Model):
slot = models.CharField(_("slot"), max_length=50, db_index=True, editable=False)
default_width = models.PositiveSmallIntegerField(_("width"), null=True, editable=False)
cache_placeholder = True
class Meta:
app_label = 'cms'
def __str__(self):
return self.slot
def get_label(self):
name = get_placeholder_conf("name", self.slot, default=title(self.slot))
name = _(name)
return name
def get_add_url(self):
return self._get_url('add_plugin')
def get_edit_url(self, plugin_pk):
return self._get_url('edit_plugin', plugin_pk)
def get_move_url(self):
return self._get_url('move_plugin')
def get_delete_url(self, plugin_pk):
return self._get_url('delete_plugin', plugin_pk)
def get_changelist_url(self):
return self._get_url('changelist')
def get_clear_url(self):
return self._get_url('clear_placeholder', self.pk)
def get_copy_url(self):
return self._get_url('copy_plugins')
def get_cache_key(self, lang):
cache_key = '%srender_placeholder:%s.%s' % (get_cms_setting("CACHE_PREFIX"), self.pk, str(lang))
if settings.USE_TZ:
tz_name = force_text(get_current_timezone_name(), errors='ignore')
cache_key += '.%s' % tz_name.encode('ascii', 'ignore').decode('ascii').replace(' ', '_')
return cache_key
def _get_url(self, key, pk=None):
model = self._get_attached_model()
args = []
if pk:
args.append(pk)
if not model:
return reverse('admin:cms_page_%s' % key, args=args)
else:
app_label = model._meta.app_label
model_name = model.__name__.lower()
return reverse('admin:%s_%s_%s' % (app_label, model_name, key), args=args)
def _get_permission(self, request, key):
"""
Generic method to check the permissions for a request for a given key,
the key can be: 'add', 'change' or 'delete'. For each attached object
permission has to be granted either on attached model or on attached object.
"""
if request.user.is_superuser:
return True
found = False
# check all attached models/objects for change permissions
for object in self._get_attached_objects():
model = object.__class__
opts = model._meta
perm_accessor = getattr(opts, 'get_%s_permission' % key)
perm_code = '%s.%s' % (opts.app_label, perm_accessor())
# if they don't have the permission for this attached model or object, bail out
if not (request.user.has_perm(perm_code) or request.user.has_perm(perm_code, object)):
return False
else:
found = True
return found
def has_change_permission(self, request):
return self._get_permission(request, 'change')
def has_add_permission(self, request):
return self._get_permission(request, 'add')
def has_delete_permission(self, request):
return self._get_permission(request, 'delete')
def render(self, context, width, lang=None):
from cms.plugin_rendering import render_placeholder
if not 'request' in context:
return '<!-- missing request -->'
width = width or self.default_width
if width:
context.update({'width': width})
return render_placeholder(self, context, lang=lang)
def get_media(self, request, context):
from cms.utils.plugins import get_plugin_media
media_classes = [get_plugin_media(request, context, plugin) for plugin in self.get_plugins()]
if media_classes:
return reduce(operator.add, media_classes)
return Media()
def _get_attached_fields(self):
"""
Returns an ITERATOR of all non-cmsplugin reverse foreign key related fields.
"""
from cms.models import CMSPlugin
if not hasattr(self, '_attached_fields_cache'):
self._attached_fields_cache = []
for rel in self._meta.get_all_related_objects():
if issubclass(rel.model, CMSPlugin):
continue
from cms.admin.placeholderadmin import PlaceholderAdminMixin
if rel.model in admin.site._registry and isinstance(admin.site._registry[rel.model], PlaceholderAdminMixin):
field = getattr(self, rel.get_accessor_name())
if field.count():
self._attached_fields_cache.append(rel.field)
return self._attached_fields_cache
def _get_attached_field(self):
from cms.models import CMSPlugin, StaticPlaceholder, Page
if not hasattr(self, '_attached_field_cache'):
self._attached_field_cache = None
relations = self._meta.get_all_related_objects()
for rel in relations:
if rel.model == Page or rel.model == StaticPlaceholder:
relations.insert(0, relations.pop(relations.index(rel)))
for rel in relations:
if issubclass(rel.model, CMSPlugin):
continue
from cms.admin.placeholderadmin import PlaceholderAdminMixin
if rel.model in admin.site._registry and isinstance(admin.site._registry[rel.model], PlaceholderAdminMixin):
field = getattr(self, rel.get_accessor_name())
if field.count():
self._attached_field_cache = rel.field
break
return self._attached_field_cache
def _get_attached_field_name(self):
field = self._get_attached_field()
if field:
return field.name
return None
def _get_attached_model(self):
if hasattr(self, '_attached_model_cache'):
return self._attached_model_cache
if self.page or self.page_set.all().count():
from cms.models import Page
self._attached_model_cache = Page
return Page
field = self._get_attached_field()
if field:
self._attached_model_cache = field.model
return field.model
self._attached_model_cache = None
return None
def _get_attached_models(self):
"""
Returns a list of models of attached to this placeholder.
"""
if hasattr(self, '_attached_models_cache'):
return self._attached_models_cache
self._attached_models_cache = [field.model for field in self._get_attached_fields()]
return self._attached_models_cache
def _get_attached_objects(self):
"""
Returns a list of objects attached to this placeholder.
"""
return [obj for field in self._get_attached_fields()
for obj in getattr(self, field.related.get_accessor_name()).all()]
def page_getter(self):
if not hasattr(self, '_page'):
from cms.models.pagemodel import Page
try:
self._page = Page.objects.get(placeholders=self)
except (Page.DoesNotExist, Page.MultipleObjectsReturned,):
self._page = None
return self._page
def page_setter(self, value):
self._page = value
page = property(page_getter, page_setter)
def get_plugins_list(self, language=None):
return list(self.get_plugins(language))
def get_plugins(self, language=None):
if language:
return self.cmsplugin_set.filter(language=language).order_by('tree_id', 'lft')
else:
return self.cmsplugin_set.all().order_by('tree_id', 'lft')
def get_filled_languages(self):
"""
Returns language objects for every language for which the placeholder
has plugins.
This is not cached as it's meant to eb used in the frontend editor.
"""
return [get_language_object(lang_code) for lang_code in set(self.get_plugins().values_list('language', flat=True))]
def get_cached_plugins(self):
return getattr(self, '_plugins_cache', [])
@property
def actions(self):
if not hasattr(self, '_actions_cache'):
field = self._get_attached_field()
self._actions_cache = getattr(field, 'actions', PlaceholderNoAction())
return self._actions_cache
reversion_register(Placeholder) # follow=["cmsplugin_set"] not following plugins since they are a spechial case