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# Copyright 2015, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools. If not, see
# <http://www.gnu.org/licenses/>.
#
from PyQt5 import QtCore
from PyQt5.QtCore import QAbstractListModel, QModelIndex, QStringListModel, Qt
from setools.policyrep.exception import NoCommon
class SEToolsListModel(QAbstractListModel):
"""
The purpose of this model is to have the
objects return their string representations
for Qt.DisplayRole and return the object
for Qt.UserRole.
"""
def __init__(self, parent):
super(SEToolsListModel, self).__init__(parent)
self._item_list = None
@property
def item_list(self):
return self._item_list
@item_list.setter
def item_list(self, item_list):
self.beginResetModel()
self._item_list = item_list
self.endResetModel()
def rowCount(self, parent=QModelIndex()):
if self.item_list:
return len(self.item_list)
else:
return 0
def columnCount(self, parent=QModelIndex()):
return 1
def data(self, index, role):
if self.item_list:
row = index.row()
if role == Qt.DisplayRole:
return str(self.item_list[row])
elif role == Qt.UserRole:
return self.item_list[row]
class PermListModel(SEToolsListModel):
"""
A model that will return the intersection of permissions
for the selected classes. If no classes are
set, all permissions in the policy will be returned.
"""
def __init__(self, parent, policy):
super(PermListModel, self).__init__(parent)
self.policy = policy
self.set_classes()
def set_classes(self, classes=[]):
permlist = set()
# start will all permissions.
for cls in self.policy.classes():
permlist.update(cls.perms)
try:
permlist.update(cls.common.perms)
except NoCommon:
pass
# create intersection
for cls in classes:
cls_perms = cls.perms
try:
cls_perms.update(cls.common.perms)
except NoCommon:
pass
permlist.intersection_update(cls_perms)
self.item_list = sorted(permlist)
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