/usr/share/virt-manager/virtManager/baseclass.py is in virt-manager 0.9.5-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2010 Red Hat, Inc.
# Copyright (C) 2010 Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#
import os
import sys
import logging
import virtManager
import virtManager.guidiff
from virtManager import util
running_config, gobject, GObject, gtk = virtManager.guidiff.get_imports()
class vmmGObject(GObject):
@staticmethod
def type_register(*args, **kwargs):
if not hasattr(gobject, "type_register"):
return
gobject.type_register(*args, **kwargs)
@staticmethod
def signal_new(klass, signal, args):
if hasattr(gobject, "signal_new"):
gobject.signal_new(signal, klass,
gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
args)
else:
klass.fake_signal_listeners[signal] = []
_leak_check = True
fake_signal_listeners = {}
def __init__(self):
GObject.__init__(self)
self.config = running_config
self._gobject_handles = []
self._gobject_timeouts = []
self._gconf_handles = []
self._signal_id_map = {}
self._next_signal_id = 1
self.object_key = str(self)
# Config might not be available if we error early in startup
if self.config and self._leak_check:
self.config.add_object(self.object_key)
def cleanup(self):
# Do any cleanup required to drop reference counts so object is
# actually reaped by python. Usually means unregistering callbacks
try:
for h in self._gconf_handles[:]:
self.remove_gconf_handle(h)
for h in self._gobject_handles[:]:
self.disconnect(h)
for h in self._gobject_timeouts[:]:
self.remove_gobject_timeout(h)
self._cleanup()
except:
logging.exception("Error cleaning up %s", self)
def _cleanup(self):
raise NotImplementedError("_cleanup must be implemented in subclass")
# Custom signal implementations
# These functions duplicate gobject signal behavior since it's
# needed for some TUI functionality
def _get_signal_listeners(self, signal_name):
return self.fake_signal_listeners[signal_name]
def _add_signal_listener(self, signal_name, cb, *args):
sigid = self._next_signal_id
self._next_signal_id += 1
self._signal_id_map[sigid] = (signal_name, cb, args)
self.fake_signal_listeners[signal_name].append((cb, args))
return sigid
def _remove_signal_listener(self, sigid):
signame, cb, args = self._signal_id_map[sigid]
listener_data = (cb, args)
if listener_data not in self.fake_signal_listeners[signame]:
raise RuntimeError("Didn't find signal listener to remove: %d" %
sigid)
self.fake_signal_listeners[signame].remove(listener_data)
del(self._signal_id_map[sigid])
def connect(self, name, callback, *args):
if hasattr(GObject, "connect"):
ret = GObject.connect(self, name, callback, *args)
self._gobject_handles.append(ret)
return ret
else:
return self._add_signal_listener(name, callback, *args)
def disconnect(self, handle):
if hasattr(GObject, "disconnect"):
ret = GObject.disconnect(self, handle)
self._gobject_handles.remove(handle)
return ret
else:
return self._remove_signal_listener(handle)
def add_gconf_handle(self, handle):
self._gconf_handles.append(handle)
def remove_gconf_handle(self, handle):
self.config.remove_notifier(handle)
self._gconf_handles.remove(handle)
def add_gobject_timeout(self, handle):
self._gobject_timeouts.append(handle)
def remove_gobject_timeout(self, handle):
if not hasattr(gobject, "source_remove"):
return
gobject.source_remove(handle)
self._gobject_timeouts.remove(handle)
def _logtrace(self, msg):
import traceback
logging.debug("%s (%s %s)\n:%s",
msg, self.object_key, self.refcount(),
"".join(traceback.format_stack()))
def refcount(self):
# Function generates 2 temporary refs, so adjust total accordingly
return (sys.getrefcount(self) - 2)
def get_hal_helper(self, init=True):
from virtManager import halhelper
return halhelper.get_hal_helper(init=init)
def connect_once(self, signal, func, *args):
id_list = []
def wrap_func(*wrapargs):
if id_list:
self.disconnect(id_list[0])
return func(*wrapargs)
conn_id = self.connect(signal, wrap_func, *args)
id_list.append(conn_id)
return conn_id
def connect_opt_out(self, signal, func, *args):
id_list = []
def wrap_func(*wrapargs):
ret = func(*wrapargs)
if ret and id_list:
self.disconnect(id_list[0])
conn_id = self.connect(signal, wrap_func, *args)
id_list.append(conn_id)
return conn_id
def idle_emit(self, signal, *args):
"""
Safe wrapper for using 'self.emit' with gobject.idle_add
"""
def emitwrap(_s, *_a):
self.emit(_s, *_a)
return False
self.idle_add(emitwrap, signal, *args)
def idle_add(self, func, *args):
"""
Make sure idle functions are run thread safe
"""
if not hasattr(gobject, "idle_add"):
return func(*args)
return gobject.idle_add(func, *args)
def timeout_add(self, timeout, func, *args):
"""
Make sure timeout functions are run thread safe
"""
if not hasattr(gobject, "timeout_add"):
return
return gobject.timeout_add(timeout, func, *args)
def emit(self, signal_name, *args):
if hasattr(GObject, "emit"):
return GObject.emit(self, signal_name, *args)
else:
for cb, customargs in self._get_signal_listeners(signal_name):
cbargs = (self,) + args + customargs
cb(*cbargs)
return
def __del__(self):
if hasattr(GObject, "__del__"):
getattr(GObject, "__del__")(self)
try:
if self.config and self._leak_check:
self.config.remove_object(self.object_key)
except:
logging.exception("Error removing %s", self.object_key)
class vmmGObjectUI(vmmGObject):
def __init__(self, filename, windowname):
vmmGObject.__init__(self)
self.windowname = windowname
self.window = None
self.topwin = None
self.uifile = None
self.err = None
if filename:
self.uifile = os.path.join(self.config.get_ui_dir(), filename)
self.window = gtk.Builder()
self.window.set_translation_domain("virt-manager")
self.window.add_from_string(
util.sanitize_gtkbuilder(self.uifile))
self.topwin = self.widget(self.windowname)
self.topwin.hide()
self.err = virtManager.error.vmmErrorDialog(self.topwin)
def widget(self, name):
return self.window.get_object(name)
def cleanup(self):
self.close()
vmmGObject.cleanup(self)
self.window = None
self.topwin.destroy()
self.topwin = None
self.uifile = None
self.err = None
def _cleanup(self):
raise NotImplementedError("_cleanup must be implemented in subclass")
def close(self, ignore1=None, ignore2=None):
pass
def bind_escape_key_close(self):
def close_on_escape(src_ignore, event):
if gtk.gdk.keyval_name(event.keyval) == "Escape":
self.close()
self.topwin.connect("key-press-event", close_on_escape)
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