setools/setoolsgui/constraintmodel.py
Chris PeBenito 61613cf3f4 apol: adjust models to handle invalid indices in data().
Infrequently data() is called with an invalid index and then apol crashes.
2016-04-21 10:07:12 -04:00

54 lines
1.8 KiB
Python

# Copyright 2016, 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 collections import defaultdict
from PyQt5.QtCore import Qt
from setools.policyrep.exception import ConstraintUseError
from .models import SEToolsTableModel
class ConstraintTableModel(SEToolsTableModel):
"""A table-based model for constraints."""
headers = defaultdict(str, {0: "Rule Type", 1: "Class", 2: "Permissions", 3: "Expression"})
def data(self, index, role):
if self.resultlist and index.isValid():
row = index.row()
col = index.column()
rule = self.resultlist[row]
if role == Qt.DisplayRole:
if col == 0:
return rule.ruletype
elif col == 1:
return str(rule.tclass)
elif col == 2:
try:
return ", ".join(sorted(rule.perms))
except ConstraintUseError:
return None
elif col == 3:
return rule._expression_str(rule.expression())
elif role == Qt.UserRole:
return rule