fix for most (all? we can dream ...) issues involved in #4399 (editing multiply-applies operations to playlists used more than once), and as a side-issue, fix playlist selection which broke when we hid Diskstreams inside Tracks by using orig_track_id() rather than orig_diskstream_id()

git-svn-id: svn://localhost/ardour2/branches/3.0@10968 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 27 insertions, 0 deletions

diff --git a/gtk2_ardour/time_axis_view.cc b/gtk2_ardour/time_axis_view.cc
index 56dd2b746d..e71bbe4778 100644
--- a/gtk2_ardour/time_axis_view.cc
+++ b/gtk2_ardour/time_axis_view.cc
@@ -1304,3 +1304,30 @@ TimeAxisView::reset_visual_state ()
 		set_height (preset_height (HeightNormal));
 	}
 }
+
+TrackViewList
+TrackViewList::filter_to_unique_playlists ()
+{
+	std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists;
+	TrackViewList ts;
+
+	for (iterator i = begin(); i != end(); ++i) {
+		RouteTimeAxisView* rtav = dynamic_cast<RouteTimeAxisView*> (*i);
+		if (!rtav) {
+			/* not a route: include it anyway */
+			ts.push_back (*i);
+		} else {
+			boost::shared_ptr<ARDOUR::Track> t = rtav->track();
+			if (t) {
+				if (playlists.insert (t->playlist()).second) {
+					/* playlist not seen yet */
+					ts.push_back (*i);
+				}
+			} else {
+				/* not a track: include it anyway */
+				ts.push_back (*i);
+			}
+		}
+	}
+	return ts;
+}