Rejigger shuffle list generator for albums mode, to insert the current album at the start of the list, starting from the current track

Playlist/PlaylistController.m

@@ -809,6 +809,39 @@
 
 	if (currentEntry && currentEntry.index >= 0)
 	{
+        if ([self shuffle] == ShuffleAlbums) {
+            NSString * currentAlbum = currentEntry.album;
+            if (!currentAlbum)
+                currentAlbum = @"";
+            
+            NSArray * wholeAlbum = [self filterPlaylistOnAlbum:currentAlbum];
+            
+            // First prune the shuffle list of the currently playing album
+            int i, j;
+            for (i = 0; i < [shuffleList count];) {
+                if ([wholeAlbum containsObject:[shuffleList objectAtIndex:i]]) {
+                    [shuffleList removeObjectAtIndex:i];
+                }
+                else {
+                    ++i;
+                }
+            }
+            
+            // Then insert the playing album at the start, beginning with
+            // the current track
+            BOOL found = NO;
+            for (i = 0, j = 0; i < [wholeAlbum count]; i++) {
+                if (!found && [wholeAlbum objectAtIndex:i] == currentEntry) {
+                    found = YES;
+                }
+                if (found) {
+                    [shuffleList insertObject:[wholeAlbum objectAtIndex:i] atIndex:j];
+                    ++j;
+                }
+            }
+            
+        }
+        else {
             [shuffleList insertObject:currentEntry atIndex:0];
             [currentEntry setShuffleIndex:0];
 
@@ -828,6 +861,7 @@
             }
         }
 	}
+}
 
 - (void)setCurrentEntry:(PlaylistEntry *)pe
 {