[pitivi] effects: Make sure the displayed names are unique

[Thibault Saunier <tsaunier src gnome org>]

commit 8f491f0d99dcec71e5840e400c2c725508547a41
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Thu Jan 14 14:22:42 2016 +0100

    effects: Make sure the displayed names are unique
    
    Reviewed-by: Thibault Saunier <tsaunier gnome org>
    Differential Revision: https://phabricator.freedesktop.org/D672

 pitivi/effects.py |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/effects.py b/pitivi/effects.py
index 5cae000..d9571bc 100644
--- a/pitivi/effects.py
+++ b/pitivi/effects.py
@@ -180,6 +180,14 @@ class EffectsManager(object):
         uselessRe = re.compile(" |".join(uselessWords))
 
         factories = Gst.Registry.get().get_feature_list(Gst.ElementFactory)
+        longnames = set()
+        duplicate_longnames = set()
+        for factory in factories:
+            longname = factory.get_longname()
+            if longname in longnames:
+                duplicate_longnames.add(longname)
+            else:
+                longnames.add(longname)
         for factory in factories:
             klass = factory.get_klass()
             name = factory.get_name()
@@ -198,7 +206,12 @@ class EffectsManager(object):
                 HIDDEN_EFFECTS.append(name)
                 continue
 
-            human_name = uselessRe.sub("", factory.get_longname()).title()
+            longname = factory.get_longname()
+            if longname in duplicate_longnames:
+                # Workaround https://bugzilla.gnome.org/show_bug.cgi?id=760566
+                # Add name which identifies the element and is unique.
+                longname = "%s %s" % (longname, name)
+            human_name = uselessRe.sub("", longname).title()
             effect = EffectInfo(name,
                                 media_type,
                                 categories=self._getEffectCategories(name),