libsaria: Filter queue

Filtering lists makes it easier to find specific songs.

libsaria/sources/queue/__init__.py

@@ -21,10 +21,11 @@ def walk_queue(*attrs):
 def filter(text):
 	global visible, filtered
 	if len(text) > 0:
+		song_set = queue.as_set()
 		visible  = song_set.intersection(library.test_filter(text))
 		filtered = True
 	else:
-		visible  = song_set
+		visible  = None
 		filtered = False
 
 def is_visible(id):

libsaria/sources/queue/queue.py

@@ -37,3 +37,9 @@ def reset():
 	lock_queue()
 	queue_list = []
 	unlock_queue()
+
+def as_set():
+	lock_queue()
+	song_set = set(queue_list)
+	unlock_queue()
+	return song_set