[gnome-music] view: show No Music view if XDG user dirs are not set

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit 0444ce2f79534729f126ac83de53506a3320f67a
Author: Vadim Rutkovsky <vrutkovs redhat com>
Date:   Tue Jan 6 12:10:39 2015 +0100

    view: show No Music view if XDG user dirs are not set
    
    https://bugzilla.gnome.org/show_bug.cgi?id=731613

 gnomemusic/query.py  |   28 +++++++++++++++++-----------
 gnomemusic/window.py |   29 +++++++++++++++++------------
 2 files changed, 34 insertions(+), 23 deletions(-)
---
diff --git a/gnomemusic/query.py b/gnomemusic/query.py
index a208a41..dd7f4fa 100644
--- a/gnomemusic/query.py
+++ b/gnomemusic/query.py
@@ -33,18 +33,24 @@ logger = logging.getLogger(__name__)
 
 
 class Query():
-    music_folder = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_MUSIC)
-    MUSIC_URI = Tracker.sparql_escape_string(GLib.filename_to_uri(music_folder))
-    download_folder = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_DOWNLOAD)
-    DOWNLOAD_URI = Tracker.sparql_escape_string(GLib.filename_to_uri(download_folder))
-
-    for folder in [music_folder, download_folder]:
-        if os.path.islink(folder):
-            logger.warn("%s is a symlink, this folder will be omitted" % folder)
-        else:
-            i = len(next(os.walk(folder))[2])
-            logger.debug("Found %d files in %s" % (i, folder))
+    music_folder = None
+    MUSIC_URI = None
+    download_folder = None
+    DOWNLOAD_URI = None
+    try:
+        music_folder = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_MUSIC)
+        MUSIC_URI = Tracker.sparql_escape_string(GLib.filename_to_uri(music_folder))
+        download_folder = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_DOWNLOAD)
+        DOWNLOAD_URI = Tracker.sparql_escape_string(GLib.filename_to_uri(download_folder))
 
+        for folder in [music_folder, download_folder]:
+            if os.path.islink(folder):
+                logger.warn("%s is a symlink, this folder will be omitted" % folder)
+            else:
+                i = len(next(os.walk(folder))[2])
+                logger.debug("Found %d files in %s" % (i, folder))
+    except TypeError:
+        logger.warn("XDG user dirs are not set")
 
     @staticmethod
     def order_by_statement(attr):
diff --git a/gnomemusic/window.py b/gnomemusic/window.py
index 6edbe97..b98b341 100644
--- a/gnomemusic/window.py
+++ b/gnomemusic/window.py
@@ -197,20 +197,25 @@ class Window(Gtk.ApplicationWindow):
         self.add(self._box)
         count = 1
         cursor = None
-        try:
-            cursor = tracker.query(Query.all_songs_count(), None)
-        except Exception as e:
-            logger.error("Tracker query crashed: %s" % e)
-            count = 0
 
-        if cursor is not None and cursor.next(None):
-            count = cursor.get_integer(0)
-        if count > 0:
-            self._switch_to_player_view()
-        # To revert to the No Music View when no songs are found
+        if Query.music_folder and Query.download_folder:
+            try:
+                cursor = tracker.query(Query.all_songs_count(), None)
+            except Exception as e:
+                logger.error("Tracker query crashed: %s" % e)
+                count = 0
+
+            if cursor is not None and cursor.next(None):
+                count = cursor.get_integer(0)
+            if count > 0:
+                self._switch_to_player_view()
+            # To revert to the No Music View when no songs are found
+            else:
+                if self.toolbar._selectionMode is False:
+                    self._switch_to_empty_view()
         else:
-            if self.toolbar._selectionMode is False:
-                self._switch_to_empty_view()
+            # Revert to No Music view if XDG dirs are not set
+            self._switch_to_empty_view()
 
         self.toolbar._search_button.connect('toggled', self._on_search_toggled)
         self.toolbar.connect('selection-mode-changed', self._on_selection_mode_changed)