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"""
Monitor.py
by Jason Conti
February 19, 2010
Monitors DBUS for org.freedesktop.Notifications.Notify messages, parses them,
and notifies listeners when they arrive.
"""
import dbus
import glib
import gobject
import gtk
import logging
import time
from dbus.mainloop.glib import DBusGMainLoop
from Icon import load_icon, load_icon_from_file
class Message(gobject.GObject):
"""Parses a DBUS message in the Notify format specified at:
http://www.galago-project.org/specs/notification/0.9/index.html"""
# Message urgency
LOW = 0
NORMAL = 1
CRITICAL = 2
def __init__(self, dbus_message, timestamp):
gobject.GObject.__init__(self)
self.timestamp = timestamp
args = dbus_message.get_args_list()
self.app_name = str(args[0])
self.replaces_id = args[1]
self.app_icon = args[2]
self.summary = str(args[3])
self.body = str(args[4])
self.actions = args[5]
self.hints = dict(args[6])
self.expire_timeout = args[7]
if "urgency" in self.hints:
urgency = self.hints["urgency"]
if urgency == 0:
self.urgency = Message.LOW
elif urgency == 2:
self.urgency = Message.CRITICAL
else:
self.urgency = Message.NORMAL
else:
self.urgency = Message.NORMAL
self.log_message()
def get_icon(self):
"""Loads the icon into a pixbuf. Adapted from the load_icon code in
bubble.c of notify-osd."""
icon_name = str(self.app_icon)
# Try to load the pixbuf from a file
if icon_name.startswith("file://") or icon_name.startswith("/"):
icon = load_icon_from_file(icon_name)
if icon != None:
return icon
# Try to load the pixbuf from the current icon theme
else:
icon = load_icon(icon_name)
if icon != None:
return icon
return self.get_default_icon()
def get_default_icon(self):
"""Attempts to load the default message icon, returns None on failure."""
if self.urgency == Message.LOW:
return load_icon("notification-low")
elif self.urgency == Message.CRITICAL:
return load_icon("notification-critical")
else:
return load_icon("notification-normal")
def formatted_timestamp(self):
"""Returned the timestamp in a different format."""
return time.strftime("%B %d, %Y at %I:%M:%S %p", self.timestamp)
def log_message(self):
"""Write debug info about a message."""
logging.debug("-" * 50)
logging.debug("Message created at: " + self.formatted_timestamp())
logging.debug("app_name: " + repr(self.app_name))
logging.debug("replaces_id: " + repr(self.replaces_id))
logging.debug("app_icon: " + repr(self.app_icon))
logging.debug("summary: " + repr(self.summary))
logging.debug("body: " + repr(self.body))
logging.debug("actions: " + repr(self.actions))
logging.debug("hints: " + repr(self.hints))
logging.debug("expire_timeout: " + repr(self.expire_timeout))
logging.debug("-" * 50)
class Monitor(gobject.GObject):
"""Monitors DBUS for org.freedesktop.Notifications.Notify messages, parses them,
and notifies listeners when they arrive."""
__gsignals__ = {
"message-received": (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, [Message])
}
def __init__(self):
gobject.GObject.__init__(self)
self._match_string = "type='method_call',interface='org.freedesktop.Notifications',member='Notify'"
DBusGMainLoop(set_as_default=True)
self._bus = dbus.SessionBus()
self._bus.add_match_string(self._match_string)
self._bus.add_message_filter(self._message_filter)
def close(self):
self._bus.close()
def _message_filter(self, connection, dbus_message):
if dbus_message.get_member() == "Notify" and dbus_message.get_interface() == "org.freedesktop.Notifications":
glib.idle_add(self.emit, "message-received", Message(dbus_message, time.localtime()))
def test_receiver(w, m):
print "-"*50
print "timestamp", m.formatted_timestamp()
print "app_name", repr(m.app_name)
print "replaces_id", repr(m.replaces_id)
print "app_icon", repr(m.app_icon)
print "summary", repr(m.summary)
print "body", repr(m.body)
print "actions", repr(m.actions)
print "hints", repr(m.hints)
print "expire_timeout", repr(m.expire_timeout)
print "-"*50
def main():
x = Monitor()
x.connect("message-received", test_receiver)
gtk.main()
if gtk.pygtk_version < (2, 8, 0):
gobject.type_register(Message)
gobject.type_register(Monitor)
if __name__ == '__main__':
main()
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