[kupfer] ui: Check that dbus is available when using appindicator

[Ulrik Sverdrup <usverdrup src gnome org>]

commit b669ed8425aa8388e94ec5a3c8f8f6e269c21a25
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Tue Mar 29 16:22:32 2011 +0200

    ui: Check that dbus is available when using appindicator
    
    The appindicator module will abort harshly if no D-Bus connection is
    found. Because of that, we have to look before we leap.

 kupfer/ui/browser.py |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/kupfer/ui/browser.py b/kupfer/ui/browser.py
index 8193580..124fd3c 100644
--- a/kupfer/ui/browser.py
+++ b/kupfer/ui/browser.py
@@ -1836,8 +1836,18 @@ class WindowController (pretty.OutputMixin):
 		menu = self._setup_menu()
 		try:
 			import appindicator
-			return self._setup_appindicator(menu)
 		except ImportError:
+			appindicator = None
+		else:
+			## make sure dbus is available, else appindicator crashes
+			import dbus
+			try:
+				dbus.Bus()
+			except dbus.DBusException:
+				appindicator = None
+		if appindicator:
+			return self._setup_appindicator(menu)
+		else:
 			return self._setup_gtk_status_icon(menu)
 
 	def _setup_gtk_status_icon(self, menu):