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Linux: Fix long startup delay on systems that do not have a desktop notification service running

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This commit is contained in:
Kovid Goyal 2017-10-20 13:41:11 +05:30
parent def1417d22
commit 7f29ced61a
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 17 additions and 13 deletions
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30
src/calibre/gui2/notify.py
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@ -31,15 +31,16 @@ class DBUSNotifier(Notifier):
ICON = I('lt.png')
def __init__(self, server, path, interface):
def __init__(self, session_bus):
self.ok, self.err = True, None
server, path, interface = self.SERVICE
if DEBUG:
start = time.time()
prints('Looking for desktop notifier support from:', server)
try:
import dbus
self.dbus = dbus
self._notify = dbus.Interface(dbus.SessionBus().get_object(server, path), interface)
self._notify = dbus.Interface(session_bus.get_object(server, path), interface)
except Exception as err:
self.ok = False
self.err = str(err)
@ -49,9 +50,7 @@ class DBUSNotifier(Notifier):
class KDENotifier(DBUSNotifier):
def __init__(self):
DBUSNotifier.__init__(self, 'org.kde.VisualNotifications',
'/VisualNotifications', 'org.kde.VisualNotifications')
SERVICE = 'org.kde.VisualNotifications', '/VisualNotifications', 'org.kde.VisualNotifications'
def __call__(self, body, summary=None, replaces_id=None, timeout=0):
if replaces_id is None:
@ -69,9 +68,7 @@ class KDENotifier(DBUSNotifier):
class FDONotifier(DBUSNotifier):
def __init__(self):
DBUSNotifier.__init__(self, 'org.freedesktop.Notifications',
'/org/freedesktop/Notifications', 'org.freedesktop.Notifications')
SERVICE = 'org.freedesktop.Notifications', '/org/freedesktop/Notifications', 'org.freedesktop.Notifications'
def __call__(self, body, summary=None, replaces_id=None, timeout=0):
if replaces_id is None:
@ -86,6 +83,17 @@ class FDONotifier(DBUSNotifier):
traceback.print_exc()
def get_dbus_notifier():
import dbus
session_bus = dbus.SessionBus()
names = frozenset(session_bus.list_names())
for srv in KDENotifier, FDONotifier:
if srv.SERVICE[0] in names:
ans = srv(session_bus)
if ans.ok:
return ans
class QtNotifier(Notifier):
def __init__(self, systray=None):
@ -159,11 +167,7 @@ class AppleNotifier(Notifier):
def get_notifier(systray=None):
ans = None
if islinux:
ans = KDENotifier()
if not ans.ok:
ans = FDONotifier()
if not ans.ok:
ans = None
ans = get_dbus_notifier()
elif isosx:
if get_osx_version() >= (10, 8, 0):
ans = AppleNotifier()