# 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/>.
#
import logging
from PyQt5.QtCore import Qt, QSortFilterProxyModel, QStringListModel, QThread
from PyQt5.QtGui import QPalette, QTextCursor
from PyQt5.QtWidgets import QCompleter, QHeaderView, QMessageBox, QProgressDialog, QScrollArea
from setools import ObjClassQuery
from ..logtosignal import LogHandlerToSignal
from ..models import PermListModel, SEToolsListModel, invert_list_selection
from ..objclassmodel import ObjClassTableModel, class_detail
from ..widget import SEToolsWidget
from .queryupdater import QueryResultsUpdater
from .workspace import load_checkboxes, load_lineedits, load_listviews, load_textedits, \
save_checkboxes, save_lineedits, save_listviews, save_textedits
class ObjClassQueryTab(SEToolsWidget, QScrollArea):
"""ObjClass browser and query tab."""
def __init__(self, parent, policy, perm_map):
super(ObjClassQueryTab, self).__init__(parent)
self.log = logging.getLogger(__name__)
self.policy = policy
self.query = ObjClassQuery(policy)
self.setupUi()
def __del__(self):
self.thread.quit()
self.thread.wait(5000)
logging.getLogger("setools.objclassquery").removeHandler(self.handler)
def setupUi(self):
self.load_ui("objclassquery.ui")
# populate class list
self.class_model = SEToolsListModel(self)
self.class_model.item_list = sorted(c for c in self.policy.classes())
self.classes.setModel(self.class_model)
# populate commons list
self.common_model = SEToolsListModel(self)
self.common_model.item_list = sorted(c for c in self.policy.commons())
self.common.setModel(self.common_model)
# populate perm list
self.perms_model = PermListModel(self, self.policy)
self.perms.setModel(self.perms_model)
# set up results
self.table_results_model = ObjClassTableModel(self)
self.sort_proxy = QSortFilterProxyModel(self)
self.sort_proxy.setSourceModel(self.table_results_model)
self.table_results.setModel(self.sort_proxy)
self.table_results.sortByColumn(0, Qt.AscendingOrder)
# setup indications of errors on level/range
self.orig_palette = self.name.palette()
self.error_palette = self.name.palette()
self.error_palette.setColor(QPalette.Base, Qt.red)
self.clear_name_error()
# set up processing thread
self.thread = QThread()
self.worker = QueryResultsUpdater(self.query, self.table_results_model)
self.worker.moveToThread(self.thread)
self.worker.raw_line.connect(self.raw_results.appendPlainText)
self.worker.finished.connect(self.update_complete)
self.worker.finished.connect(self.thread.quit)
self.thread.started.connect(self.worker.update)
# create a "busy, please wait" dialog
self.busy = QProgressDialog(self)
self.busy.setModal(True)
self.busy.setRange(0, 0)
self.busy.setMinimumDuration(0)
self.busy.canceled.connect(self.thread.requestInterruption)
self.busy.reset()
# update busy dialog from query INFO logs
self.handler = LogHandlerToSignal()
self.handler.message.connect(self.busy.setLabelText)
logging.getLogger("setools.objclassquery").addHandler(self.handler)
# Ensure settings are consistent with the initial .ui state
self.notes.setHidden(not self.notes_expander.isChecked())
# connect signals
self.classes.doubleClicked.connect(self.get_detail)
self.classes.get_detail.triggered.connect(self.get_detail)
self.name.textEdited.connect(self.clear_name_error)
self.name.editingFinished.connect(self.set_name)
self.name_regex.toggled.connect(self.set_name_regex)
self.common.selectionModel().selectionChanged.connect(self.set_common)
self.perms.selectionModel().selectionChanged.connect(self.set_perms)
self.invert_perms.clicked.connect(self.invert_perms_selection)
self.buttonBox.clicked.connect(self.run)
#
# Class browser
#
def get_detail(self):
# .ui is set for single item selection.
index = self.classes.selectedIndexes()[0]
item = self.class_model.data(index, Qt.UserRole)
self.log.debug("Generating detail window for {0}".format(item))
class_detail(self, item)
#
# Name criteria
#
def clear_name_error(self):
self.name.setToolTip("Match the object class name.")
self.name.setPalette(self.orig_palette)
def set_name(self):
try:
self.query.name = self.name.text()
except Exception as ex:
self.log.error("Object class name error: {0}".format(ex))
self.name.setToolTip("Error: " + str(ex))
self.name.setPalette(self.error_palette)
def set_name_regex(self, state):
self.log.debug("Setting name_regex {0}".format(state))
self.query.name_regex = state
self.clear_name_error()
self.set_name()
#
# Common criteria
#
def set_common(self):
for index in self.common.selectionModel().selectedIndexes():
self.query.common = self.common_model.data(index, Qt.UserRole)
break
else:
self.query.common = None
#
# Permissions criteria
#
def set_perms(self):
selected_perms = []
for index in self.perms.selectionModel().selectedIndexes():
selected_perms.append(self.perms_model.data(index, Qt.UserRole))
self.query.perms = selected_perms
def invert_perms_selection(self):
invert_list_selection(self.perms.selectionModel())
#
# Save/Load tab
#
def save(self):
"""Return a dictionary of settings."""
settings = {}
save_checkboxes(self, settings, ["criteria_expander", "notes_expander", "name_regex",
"perms_equal"])
save_lineedits(self, settings, ["name"])
save_listviews(self, settings, ["common", "perms"])
save_textedits(self, settings, ["notes"])
return settings
def load(self, settings):
load_checkboxes(self, settings, ["criteria_expander", "notes_expander", "name_regex",
"perms_equal"])
load_lineedits(self, settings, ["name"])
load_listviews(self, settings, ["common", "perms"])
load_textedits(self, settings, ["notes"])
#
# Results runner
#
def run(self, button):
# right now there is only one button.
self.query.perms_equal = self.perms_equal.isChecked()
# start processing
self.busy.setLabelText("Processing query...")
self.busy.show()
self.raw_results.clear()
self.thread.start()
def update_complete(self, count):
self.log.info("{0} object class(es) found.".format(count))
# update sizes/location of result displays
if not self.busy.wasCanceled():
self.busy.setLabelText("Resizing the result table's columns; GUI may be unresponsive")
self.busy.repaint()
self.table_results.resizeColumnsToContents()
# If the permissions column width is too long, pull back
# to a reasonable size
header = self.table_results.horizontalHeader()
if header.sectionSize(1) > 400:
header.resizeSection(1, 400)
if not self.busy.wasCanceled():
self.busy.setLabelText("Resizing the result table's rows; GUI may be unresponsive")
self.busy.repaint()
self.table_results.resizeRowsToContents()
if not self.busy.wasCanceled():
self.busy.setLabelText("Moving the raw result to top; GUI may be unresponsive")
self.busy.repaint()
self.raw_results.moveCursor(QTextCursor.Start)
self.busy.reset()