394 lines
14 KiB
Python
394 lines
14 KiB
Python
#!/usr/bin/python3
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2018 Marta Marczykowska-Górecka
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# <marmarta@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program; if not, see <http://www.gnu.org/licenses/>.
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#
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#
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from qubesadmin import exc
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from PyQt5 import QtWidgets, QtGui, QtCore # pylint: disable=import-error
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from . import ui_templatemanager # pylint: disable=no-name-in-module
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from . import utils
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column_names = ['State', 'Qube', 'Current template', 'New template']
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class TemplateManagerWindow(
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ui_templatemanager.Ui_MainWindow, QtWidgets.QMainWindow):
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def __init__(self, qt_app, qubes_app, dispatcher, parent=None):
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# pylint: disable=unused-argument
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super(TemplateManagerWindow, self).__init__()
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self.setupUi(self)
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self.qubes_app = qubes_app
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self.qt_app = qt_app
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self.dispatcher = dispatcher
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self.rows_in_table = {}
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self.templates = []
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self.timers = []
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self.prepare_lists()
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self.initialize_table_events()
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self.buttonBox.button(QtWidgets.QDialogButtonBox.Ok).clicked.connect(
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self.apply)
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self.buttonBox.button(
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QtWidgets.QDialogButtonBox.Cancel).clicked.connect(self.cancel)
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self.buttonBox.button(QtWidgets.QDialogButtonBox.Reset).clicked.connect(
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self.reset)
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self.change_all_combobox.currentIndexChanged.connect(
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self.change_all_changed)
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self.clear_selection_button.clicked.connect(self.clear_selection)
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self.vm_list.show()
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def setup_application(self):
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self.qt_app.setApplicationName(self.tr("Template Manager"))
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self.qt_app.setWindowIcon(QtGui.QIcon.fromTheme("qubes-manager"))
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def prepare_lists(self):
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self.templates = [vm.name for vm in self.qubes_app.domains
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if vm.klass == 'TemplateVM']
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self.change_all_combobox.addItem(self.tr('(select template)'))
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for template in self.templates:
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self.change_all_combobox.addItem(template)
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vms_with_templates = [vm for vm in self.qubes_app.domains
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if getattr(vm, 'template', None) and
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vm.klass != 'DispVM']
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self.vm_list.setColumnCount(len(column_names))
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self.vm_list.setRowCount(len(vms_with_templates))
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row_count = 0
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for vm in vms_with_templates:
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row = VMRow(vm, row_count, self.vm_list, column_names,
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self.templates)
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self.rows_in_table[vm.name] = row
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row_count += 1
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self.vm_list.setHorizontalHeaderLabels(
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['', self.tr('Qube'), self.tr('Current'), self.tr('New')])
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self.vm_list.resizeColumnsToContents()
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def initialize_table_events(self):
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self.vm_list.cellDoubleClicked.connect(self.table_double_click)
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self.vm_list.cellClicked.connect(self.table_click)
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self.vm_list.horizontalHeader().sortIndicatorChanged.connect(
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self.sorting_changed)
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self.dispatcher.add_handler('domain-pre-start', self.vm_state_changed)
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self.dispatcher.add_handler('domain-start-failed',
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self.vm_state_changed)
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self.dispatcher.add_handler('domain-stopped', self.vm_state_changed)
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self.dispatcher.add_handler('domain-shutdown', self.vm_state_changed)
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self.dispatcher.add_handler('domain-add', self.vm_added)
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self.dispatcher.add_handler('domain-delete', self.vm_removed)
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def vm_added(self, _submitter, _event, vm, **_kwargs):
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# unfortunately, a VM just in the moment of creation may not have
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# a template it will have in a second - e.g., when cloning
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timer = QtCore.QTimer()
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timer.setSingleShot(True)
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timer.timeout.connect(lambda: self._vm_added(vm, timer))
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self.timers.append(timer)
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timer.start(1000) # 1s
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def _vm_added(self, vm_name, timer):
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self.timers.remove(timer)
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try:
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vm = self.qubes_app.domains[vm_name]
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if not getattr(vm, 'template', None) or vm.klass == 'DispVM':
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return
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except (exc.QubesException, KeyError):
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return # it was a dispVM that crashed on start
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row_no = self.vm_list.rowCount()
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self.vm_list.setRowCount(self.vm_list.rowCount() + 1)
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row = VMRow(vm, row_no, self.vm_list, column_names,
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self.templates)
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self.rows_in_table[vm.name] = row
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self.vm_list.show()
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def vm_removed(self, _submitter, _event, **kwargs):
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if kwargs['vm'] not in self.rows_in_table:
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return
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self.vm_list.removeRow(self.rows_in_table[kwargs['vm']].name_item.row())
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def vm_state_changed(self, vm, event, **_kwargs):
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try:
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if vm.name not in self.rows_in_table:
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return
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except exc.QubesException:
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return # it was a crashing DispVM or closed DispVM
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if event == 'domain-pre-start':
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self.rows_in_table[vm.name].vm_state_change(is_running=True)
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elif event == 'domain-start-failed':
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self.rows_in_table[vm.name].vm_state_change(is_running=False)
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elif event == 'domain-stopped':
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self.rows_in_table[vm.name].vm_state_change(is_running=False)
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elif event == 'domain-shutdown':
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self.rows_in_table[vm.name].vm_state_change(is_running=False)
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def sorting_changed(self, index, _order):
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# this is very much not perfect, but QTableWidget does not
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# want to be sorted on custom widgets
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if index == column_names.index('New template') or \
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index == column_names.index('State'):
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self.vm_list.horizontalHeader().setSortIndicator(
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-1, QtCore.Qt.AscendingOrder)
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def clear_selection(self):
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for row in self.rows_in_table.values():
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if row.checkbox:
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row.checkbox.setChecked(False)
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def change_all_changed(self):
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if self.change_all_combobox.currentIndex() == 0:
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return
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selected_template = self.change_all_combobox.currentText()
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for row in self.rows_in_table.values():
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if row.checkbox and row.checkbox.isChecked():
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row.new_item.setCurrentIndex(
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row.new_item.findText(selected_template))
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self.change_all_combobox.setCurrentIndex(0)
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def table_double_click(self, row, column):
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template_column = column_names.index('Current template')
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if column != template_column:
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return
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template_name = self.vm_list.item(row, column).text()
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for row_number in range(0, self.vm_list.rowCount()):
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if self.vm_list.item(
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row_number, template_column).text() == template_name:
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checkbox = self.vm_list.cellWidget(
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row_number, column_names.index('State'))
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if checkbox:
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if row_number == row:
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# this is because double click registers as a
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# single click and a double click
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checkbox.setChecked(False)
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else:
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checkbox.setChecked(True)
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def table_click(self, row, column):
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if column == column_names.index('New template'):
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return
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checkbox = self.vm_list.cellWidget(row, column_names.index('State'))
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if not checkbox:
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return
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checkbox.setChecked(not checkbox.isChecked())
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def reset(self):
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for row in self.rows_in_table.values():
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if row.new_item:
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row.new_item.reset_choice()
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if row.checkbox:
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row.checkbox.setChecked(False)
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def cancel(self):
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self.close()
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def apply(self):
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errors = {}
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for vm, row in self.rows_in_table.items():
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if row.new_item and row.new_item.changed:
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try:
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setattr(self.qubes_app.domains[vm],
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'template', row.new_item.currentText())
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except Exception as ex: # pylint: disable=broad-except
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errors[vm] = str(ex)
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if errors:
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error_messages = [vm + ": " + errors[vm] for vm in errors]
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QtWidgets.QMessageBox.warning(
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self,
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self.tr("Errors encountered!"),
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self.tr(
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"Errors encountered on template change in the following "
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"qubes: <br> {}.").format("<br> ".join(error_messages)))
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self.close()
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class VMNameItem(QtWidgets.QTableWidgetItem):
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# pylint: disable=too-few-public-methods
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def __init__(self, vm):
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super(VMNameItem, self).__init__()
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self.vm = vm
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self.setText(self.vm.name)
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self.setIcon(QtGui.QIcon.fromTheme(vm.label.icon))
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class StatusItem(QtWidgets.QTableWidgetItem):
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def __init__(self, vm):
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super(StatusItem, self).__init__()
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self.vm = vm
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self.state = None
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def set_state(self, is_running):
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self.state = is_running
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if self.state:
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self.setIcon(QtGui.QIcon.fromTheme('dialog-warning'))
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self.setToolTip(QtCore.QCoreApplication.translate(
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"template-manager", "Cannot change template on a running VM."))
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else:
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self.setIcon(QtGui.QIcon())
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self.setToolTip("")
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def __lt__(self, other):
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if self.state == other.state:
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return self.vm.name < other.vm.name
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return self.state < other.state
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class CurrentTemplateItem(QtWidgets.QTableWidgetItem):
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# pylint: disable=too-few-public-methods
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def __init__(self, vm):
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super(CurrentTemplateItem, self).__init__()
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self.vm = vm
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self.setText(self.vm.template.name)
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def __lt__(self, other):
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if self.text() == other.text():
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return self.vm.name < other.vm.name
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return self.text() < other.text()
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class NewTemplateItem(QtWidgets.QComboBox):
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def __init__(self, vm, templates, table_widget):
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super(NewTemplateItem, self).__init__()
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self.vm = vm
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self.table_widget = table_widget
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self.changed = False
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for template in templates:
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self.addItem(template)
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self.setCurrentIndex(self.findText(vm.template.name))
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self.start_value = self.currentText()
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self.currentIndexChanged.connect(self.choice_changed)
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def choice_changed(self):
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if self.currentText() != self.start_value:
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self.changed = True
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self.setStyleSheet('font-weight: bold')
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else:
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self.changed = False
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self.setStyleSheet('font-weight: normal')
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def reset_choice(self):
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self.setCurrentIndex(self.findText(self.start_value))
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class VMRow:
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# pylint: disable=too-few-public-methods
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def __init__(self, vm, row_no, table_widget, columns, templates):
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self.vm = vm
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self.table_widget = table_widget
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self.templates = templates
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# state
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self.state_item = StatusItem(self.vm)
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table_widget.setItem(row_no, columns.index('State'), self.state_item)
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self.checkbox = QtWidgets.QCheckBox()
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# icon and name
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self.name_item = VMNameItem(self.vm)
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table_widget.setItem(row_no, columns.index('Qube'), self.name_item)
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# current template
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self.current_item = CurrentTemplateItem(self.vm)
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table_widget.setItem(row_no, columns.index('Current template'),
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self.current_item)
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# new template
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self.dummy_new_item = QtWidgets.QTableWidgetItem(
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QtCore.QCoreApplication.translate("TemplateManager",
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"qube is running"))
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self.new_item = NewTemplateItem(self.vm, templates, table_widget)
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table_widget.setItem(row_no, columns.index('New template'),
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self.dummy_new_item)
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self.vm_state_change(self.vm.is_running(), row_no)
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def vm_state_change(self, is_running, row=None):
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self.state_item.set_state(is_running)
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if not row:
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row = 0
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while row < self.table_widget.rowCount():
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if self.table_widget.item(
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row, column_names.index('Qube')).text() == \
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self.name_item.text():
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break
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row += 1
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# hiding cellWidgets does not work in a qTableWidget
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if not is_running:
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self.new_item = NewTemplateItem(self.vm, self.templates,
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self.table_widget)
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self.checkbox = QtWidgets.QCheckBox()
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self.table_widget.setCellWidget(
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row, column_names.index('New template'), self.new_item)
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self.table_widget.setCellWidget(
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row, column_names.index('State'), self.checkbox)
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else:
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new_template = self.table_widget.cellWidget(
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row, column_names.index('New template'))
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if new_template:
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self.table_widget.removeCellWidget(
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row, column_names.index('New template'))
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self.new_item = None
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checkbox = self.table_widget.cellWidget(
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row, column_names.index('State'))
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if checkbox:
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self.table_widget.removeCellWidget(
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row, column_names.index('State'))
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self.checkbox = None
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def main():
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utils.run_asynchronous(TemplateManagerWindow)
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if __name__ == "__main__":
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main()
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