Implement 2532: option to show tracks with regions under the playhead.

git-svn-id: svn://localhost/ardour2/branches/3.0@6207 d708f5d6-7413-0410-9779-e7cbd77b26cf

4 files changed, 50 insertions, 0 deletions

diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index 693b2de2dd..3ed32f0984 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -120,6 +120,8 @@ class Playlist : public SessionObject,
 	boost::shared_ptr<Region>  find_next_region (nframes_t frame, RegionPoint point, int dir);
 	nframes64_t                find_next_region_boundary (nframes64_t frame, int dir);
 	bool                       region_is_shuffle_constrained (boost::shared_ptr<Region>);
+	bool                       has_region_at (nframes64_t const) const;
+
 
 	nframes64_t find_next_transient (nframes64_t position, int dir);
 
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 48a7ce7a39..bfbbabe877 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -322,6 +322,8 @@ class Session : public PBD::StatefulDestructible, public boost::noncopyable
 
 	boost::shared_ptr<RouteList> get_routes_with_internal_returns() const;
 
+	boost::shared_ptr<RouteList> get_routes_with_regions_at (nframes64_t const) const;
+
 	uint32_t nroutes() const { return routes.reader()->size(); }
 	uint32_t ntracks () const;
 	uint32_t nbusses () const;
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index aa41bf65d1..bcc4c6061d 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -2521,3 +2521,17 @@ Playlist::set_explicit_relayering (bool e)
 
 	_explicit_relayering = e;
 }
+
+
+bool
+Playlist::has_region_at (nframes64_t const p) const
+{
+	RegionLock (const_cast<Playlist *> (this));
+	
+	RegionList::const_iterator i = regions.begin ();
+	while (i != regions.end() && !(*i)->covers (p)) {
+		++i;
+	}
+
+	return (i != regions.end());
+}
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index f7dfd2111d..598d9b01b5 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -4513,3 +4513,35 @@ Session::get_available_sync_options () const
 
 	return ret;
 }
+
+boost::shared_ptr<RouteList>
+Session::get_routes_with_regions_at (nframes64_t const p) const
+{
+	shared_ptr<RouteList> r = routes.reader ();
+	shared_ptr<RouteList> rl (new RouteList);
+
+	for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+		boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
+		if (!tr) {
+			continue;
+		}
+		
+		boost::shared_ptr<Diskstream> ds = tr->diskstream ();
+		if (!ds) {
+			continue;
+		}
+
+		boost::shared_ptr<Playlist> pl = ds->playlist ();
+		if (!pl) {
+			continue;
+		}
+		
+		if (pl->has_region_at (p)) {
+			rl->push_back (*i);
+		}
+	}
+
+	return rl;
+}
+
+