[pitivi] ExportSettings: remember element settings on a per-factory basis

[Edward Hervey <edwardrv src gnome org>]

commit 65d97deb27445bfc130f199f05620b446f8bb7f8
Author: Brandon Lewis <brandon_lewis alum berkeley edu>
Date:   Fri Nov 19 19:19:10 2010 +0000

    ExportSettings: remember element settings on a per-factory basis

 pitivi/settings.py |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/settings.py b/pitivi/settings.py
index 250832a..f1731ad 100644
--- a/pitivi/settings.py
+++ b/pitivi/settings.py
@@ -456,6 +456,10 @@ class ExportSettings(Signallable, Loggable):
     # TODO : Add PAR/DAR for video
     # TODO : switch to using GstFraction internally where appliable
 
+
+    # TODO: initialize this cache from the project file?
+    factory_settings_cache = {}
+
     def __init__(self, **unused_kw):
         Loggable.__init__(self)
         self.videowidth = 720
@@ -585,17 +589,24 @@ class ExportSettings(Signallable, Loggable):
         """ Set the video/audio encoder and muxer """
         changed = False
         if not muxer == "" and not muxer == self.muxer:
+            self._updateSettingsCache(self.muxer, muxer, 'containersettings')
             self.muxer = muxer
             changed = True
         if not vencoder == "" and not vencoder == self.vencoder:
+            self._updateSettingsCache(self.vencoder, vencoder, 'vcodecsettings')
             self.vencoder = vencoder
             changed = True
         if not aencoder == "" and not aencoder == self.aencoder:
+            self._updateSettingsCache(self.aencoder, aencoder, 'acodecsettings')
             self.aencoder = aencoder
             changed = True
         if changed:
             self.emit("encoders-changed")
 
+    def _updateSettingsCache(self, current, new, attr):
+        self.factory_settings_cache[current] = getattr(self, attr)
+        setattr(self, attr, self.factory_settings_cache.get(new, {}))
+
     def getAudioEncoders(self):
         """ Returns the list of audio encoders compatible with the current
         muxer """