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OpenStack Study: base.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright 2012 Nebula, Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from django import template from django.utils.translation import ugettext_lazy as _ from horizon.browsers.breadcrumb import Breadcrumb # noqa from horizon.tables import DataTable # noqa from horizon.utils import html
**** CubicPower OpenStack Study **** class ResourceBrowser(html.HTMLElement): """A class which
**** CubicPower OpenStack Study **** def __init__(self, request, tables_dict=None, attrs=None, **kwargs): super(ResourceBrowser, self).__init__() self.name = self.name or self.__class__.__name__ self.verbose_name = self.verbose_name or self.name.title() self.request = request self.kwargs = kwargs self.has_breadcrumb = getattr(self, "has_breadcrumb") if self.has_breadcrumb: self.breadcrumb_template = getattr(self, "breadcrumb_template") self.breadcrumb_url = getattr(self, "breadcrumb_url") if not self.breadcrumb_url: raise ValueError("You must specify a breadcrumb_url " "if the has_breadcrumb is set to True.") self.attrs.update(attrs or {}) self.check_table_class(self.content_table_class, "content_table_class") self.check_table_class(self.navigation_table_class, "navigation_table_class") if tables_dict: self.set_tables(tables_dict)
**** CubicPower OpenStack Study **** def check_table_class(self, cls, attr_name): if not cls or not issubclass(cls, DataTable): raise ValueError("You must specify a DataTable subclass for " "the %s attribute on %s." % (attr_name, self.__class__.__name__))
**** CubicPower OpenStack Study **** def set_tables(self, tables): """Sets the table instances on the browser from a dictionary mapping table names to table instances (as constructed by MultiTableView). """ self.navigation_table = tables[self.navigation_table_class._meta.name] self.content_table = tables[self.content_table_class._meta.name] navigation_item = self.kwargs.get(self.navigation_kwarg_name) content_path = self.kwargs.get(self.content_kwarg_name) # Tells the navigation table what is selected. self.navigation_table.current_item_id = navigation_item if self.has_breadcrumb: self.prepare_breadcrumb(tables, navigation_item, content_path)
**** CubicPower OpenStack Study **** def prepare_breadcrumb(self, tables, navigation_item, content_path): if self.has_breadcrumb and navigation_item and content_path: for table in tables.values(): table.breadcrumb = Breadcrumb(self.request, self.breadcrumb_template, navigation_item, content_path, self.breadcrumb_url)
**** CubicPower OpenStack Study **** def render(self): browser_template = template.loader.get_template(self.template) extra_context = {self.context_var_name: self} context = template.RequestContext(self.request, extra_context) return browser_template.render(context)
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