added simple DBUS notification interface

slic/utils/dbusnotify.py

@@ -0,0 +1,79 @@
+import dbus
+
+
+BUS_NAME = "org.freedesktop.Notifications"
+OBJECT_PATH = "/org/freedesktop/Notifications"
+
+
+class DBusNotify:
+
+    def __init__(self):
+        bus = dbus.SessionBus()
+        obj = bus.get_object(BUS_NAME, OBJECT_PATH)
+        self.interface = interface = dbus.Interface(obj, BUS_NAME)
+
+    def notify(self, summary, body="", **kwargs):
+        nid = self._notify(summary=summary, body=body, **kwargs)
+        return Notification(self, nid, summary, body)
+
+    def _notify(self,
+        app_name = "",
+        replaces_id = 0,
+        app_icon = "",
+        summary = "",
+        body = "",
+        actions = (),
+        hints = {}, # mutable, but should not be a problem
+        expire_timeout = 0
+    ):
+        nid = self.interface.Notify(
+            app_name,
+            replaces_id,
+            app_icon,
+            summary,
+            body,
+            actions,
+            hints,
+            expire_timeout
+        )
+        return int(nid)
+
+    def get_capabilities(self):
+        raw = self.interface.GetCapabilities()
+        return convert_dbus_strings(raw)
+
+    def get_server_info(self):
+        raw = self.interface.GetServerInformation()
+        name, vendor, version, spec = convert_dbus_strings(raw)
+        return dict(name=name, vendor=vendor, version=version, spec=spec)
+
+
+
+class Notification:
+
+    def __init__(self, dbn, nid, summary, body):
+        self.dbn = dbn
+        self.nid = nid
+        self.summary = summary
+        self.body = body
+
+    def update(self, **kwargs):
+        kwargs.setdefault("replaces_id", self.nid)
+        kwargs.setdefault("summary", self.summary)
+        kwargs.setdefault("body", self.body)
+        nid = self.dbn._notify(**kwargs)
+        assert self.nid == nid
+        self.summary = kwargs["summary"]
+        self.body = kwargs["body"]
+        return self
+
+    def close(self):
+        self.dbn.interface.CloseNotification(self.nid)
+
+
+
+def convert_dbus_strings(seq):
+    return tuple(str(i) if isinstance(i, dbus.String) else i for i in seq)
+
+
+