save collapsed groups between launches

macosx/Controller.m

@@ -580,6 +580,7 @@ void sleepCallBack(void * controller, io_service_t y, natural_t messageType, voi
     
     //save history
     [self updateTorrentHistory];
+    [fTableView saveCollapsedGroups];
     
     //remaining calls the same as dealloc 
     [fInfoController release];

macosx/TorrentTableView.h

@@ -55,6 +55,7 @@
 - (BOOL) isGroupCollapsed: (int) value;
 - (void) removeCollapsedGroup: (int) value;
 - (void) removeAllCollapsedGroups;
+- (void) saveCollapsedGroups;
 
 - (void) removeButtonTrackingAreas;
 - (void) setControlButtonHover: (int) row;

macosx/TorrentTableView.m

@@ -63,7 +63,11 @@
         if (![NSApp isOnLeopardOrBetter])
             [[self tableColumnWithIdentifier: @"Torrent"] setDataCell: fTorrentCell];
         
-        fCollapsedGroups = [[NSMutableIndexSet alloc] init];
+        NSData * groupData = [fDefaults dataForKey: @"CollapsedGroups"];
+        if (groupData)
+            fCollapsedGroups = [[NSUnarchiver unarchiveObjectWithData: groupData] retain];
+        else
+            fCollapsedGroups = [[NSMutableIndexSet alloc] init];
         
         fMouseControlRow = -1;
         fMouseRevealRow = -1;
@@ -113,6 +117,11 @@
     [fCollapsedGroups removeAllIndexes];
 }
 
+- (void) saveCollapsedGroups
+{
+    [fDefaults setObject: [NSArchiver archivedDataWithRootObject: fCollapsedGroups] forKey: @"CollapsedGroups"];
+}
+
 - (BOOL) outlineView: (NSOutlineView *) outlineView isGroupItem: (id) item
 {
     return ![item isKindOfClass: [Torrent class]];