[Rigo] add support for basic preserved libraries notification

rigo/rigo/controllers/daemon.py

@@ -37,7 +37,8 @@ from rigo.ui.gtk3.widgets.notifications import NotificationBox, \
     PleaseWaitNotificationBox, LicensesNotificationBox, \
     OrphanedAppsNotificationBox, InstallNotificationBox, \
     RemovalNotificationBox, QueueActionNotificationBox, \
-    UpdatesNotificationBox, RepositoriesUpdateNotificationBox
+    UpdatesNotificationBox, RepositoriesUpdateNotificationBox, \
+    PreservedLibsNotificationBox
 
 from rigo.utils import prepare_markup
 
@@ -188,6 +189,7 @@ class RigoServiceController(GObject.Object):
     _NOTICEBOARDS_AVAILABLE_SIGNAL = "noticeboards_available"
     _REPOS_SETTINGS_CHANGED_SIGNAL = "repositories_settings_changed"
     _MIRRORS_OPTIMIZED_SIGNAL = "mirrors_optimized"
+    _PRESERVED_LIBS_AVAILABLE_SIGNAL = "preserved_libraries_available"
     _SUPPORTED_APIS = [6, 7, 8]
 
     def __init__(self, rigo_app, activity_rwsem,
@@ -572,6 +574,21 @@ class RigoServiceController(GObject.Object):
                     self._mirrors_optimized_signal,
                     dbus_interface=self.DBUS_INTERFACE)
 
+                # RigoDaemon talls us that there are preserved libraries
+                # on the system
+                try:
+                    self.__entropy_bus.connect_to_signal(
+                        self._PRESERVED_LIBS_AVAILABLE_SIGNAL,
+                        self._preserved_libraries_signal,
+                        dbus_interface=self.DBUS_INTERFACE)
+                except dbus.exceptions.DBusException as exc:
+                    # signal may not be available, ignore.
+                    const_debug_write(
+                        __name__,
+                        "_entropy_bus: %s signal not available: %s" % (
+                            self._PRESERVED_LIBS_AVAILABLE_SIGNAL,
+                            exc,))
+
             self._execute_mainloop(_init)
             return self.__entropy_bus
 
@@ -1153,6 +1170,21 @@ class RigoServiceController(GObject.Object):
             context_id=self.OPTIMIZE_MIRRORS_CONTEXT_ID)
         self._nc.append(box, timeout=30)
 
+    def _preserved_libraries_signal(self, preserved):
+        """
+        RigoDaemon is signaling that there are preserved libraries on the
+        system.
+        """
+        if self._nc is not None:
+
+            def _on_upgrade(box):
+                self._nc.remove(box)
+                self.upgrade_system()
+
+            box = PreservedLibsNotificationBox(preserved)
+            box.connect("upgrade-request", _on_upgrade)
+            self._nc.append(box)
+
     def _output_signal(self, text, header, footer, back, importance, level,
                count_c, count_t, percent, raw):
         """

rigo/rigo/ui/gtk3/widgets/notifications.py

@@ -1194,3 +1194,40 @@ class RenameRepositoryNotificationBox(NotificationBox):
 
         self.destroy()
         self.emit("renamed")
+
+
+class PreservedLibsNotificationBox(NotificationBox):
+
+    __gsignals__ = {
+        # Update button clicked
+        "upgrade-request" : (GObject.SignalFlags.RUN_LAST,
+                          None,
+                          tuple(),
+                          ),
+    }
+
+    def __init__(self, preserved):
+
+        preserved_len = len(preserved)
+        msg = ngettext("There is <b>%d</b> preserved library on the system",
+                       "There are <b>%d</b> preserved libraries on the system",
+                       preserved_len)
+        msg = msg % (preserved_len,)
+
+        msg += ". " + _("What to do?")
+
+        NotificationBox.__init__(
+            self, prepare_markup(msg),
+            tooltip=prepare_markup(
+                _("Preserved libraries detected on the system.")),
+            message_type=Gtk.MessageType.WARNING,
+            context_id="PreservedLibsNotificationBox")
+
+        self.add_button(_("_Update system now"), self._update)
+        self.add_destroy_button(_("_Ignore"))
+
+    def _update(self, button):
+        """
+        Update button callback from the updates notification box.
+        """
+        self.emit("upgrade-request")