save and restore clock modes
[ardour.git] / gtk2_ardour / editor_ops.cc
index 1e5f336e525bb1ef7e89064d9e82948db0f7bd72..e4de1c1e2ea7d528d3247e2255f2266ec5a4b5a9 100644 (file)
@@ -44,6 +44,7 @@
 #include <ardour/audio_track.h>
 #include <ardour/audioplaylist.h>
 #include <ardour/region_factory.h>
+#include <ardour/playlist_factory.h>
 #include <ardour/reverse.h>
 
 #include "ardour_ui.h"
@@ -56,7 +57,6 @@
 #include "rgb_macros.h"
 #include "selection_templates.h"
 #include "selection.h"
-#include "sfdb_ui.h"
 #include "editing.h"
 #include "gtk-custom-hruler.h"
 #include "gui_thread.h"
@@ -90,89 +90,8 @@ Editor::redo (uint32_t n)
        }
 }
 
-void
-Editor::set_meter_hold (int32_t cnt)
-{
-       Config->set_meter_hold_off(false);
-       Config->set_meter_hold_short(false);
-       Config->set_meter_hold_medium(false);
-       Config->set_meter_hold_long(false);
-
-       switch (cnt)
-       {
-               case 0:
-                Config->set_meter_hold_off(true);
-                break;
-               case 40:
-                Config->set_meter_hold_short(true);
-                break;
-               case 100:
-                Config->set_meter_hold_medium(true);
-                break;
-               case 200:
-                Config->set_meter_hold_long(true);
-                break;
-       }
-                
-       if (session) {
-               session->set_meter_hold (cnt);
-       }
-}
-
-void
-Editor::set_meter_falloff (int intval)
-{
-       float val = 0.0f; /* off */
-       std::string str;
-
-       Config->set_meter_falloff_off(false);
-       Config->set_meter_falloff_slowest(false);
-       Config->set_meter_falloff_slow(false);
-       Config->set_meter_falloff_medium(false);
-       Config->set_meter_falloff_fast(false);
-       Config->set_meter_falloff_faster(false);
-       Config->set_meter_falloff_fastest(false);
-       
-       switch (intval)
-       {
-               case 0:
-                val = 0.0f;
-                Config->set_meter_falloff_off(true);
-                break;
-               case 1:
-                val = 0.266f;
-                Config->set_meter_falloff_slowest(true);
-                break;
-               case 2:
-                val = 0.342f;
-                Config->set_meter_falloff_slow(true);
-                break;
-               case 3:
-                val = 0.7f;
-                Config->set_meter_falloff_medium(true);
-                break;
-               case 4:
-                val = 1.1f;
-                Config->set_meter_falloff_fast(true);
-                break;
-               case 5:
-                val = 1.5f;
-                Config->set_meter_falloff_faster(true);
-                break;
-               case 6:
-                val = 2.5f;
-                Config->set_meter_falloff_fastest(true);
-                break;
-       }
-       
-       if (session) {
-               session->set_meter_falloff (val);
-       }
-}
-
-
 int
-Editor::ensure_cursor (jack_nframes_t *pos)
+Editor::ensure_cursor (nframes_t *pos)
 {
        *pos = edit_cursor->current_frame;
        return 0;
@@ -185,13 +104,13 @@ Editor::split_region ()
 }
 
 void
-Editor::split_region_at (jack_nframes_t where)
+Editor::split_region_at (nframes_t where)
 {
        split_regions_at (where, selection->regions);
 }
 
 void
-Editor::split_regions_at (jack_nframes_t where, RegionSelection& regions)
+Editor::split_regions_at (nframes_t where, RegionSelection& regions)
 {
        begin_reversible_command (_("split"));
 
@@ -203,7 +122,7 @@ Editor::split_regions_at (jack_nframes_t where, RegionSelection& regions)
                tmp = a;
                ++tmp;
 
-               Playlist* pl = (*a)->region().playlist();
+               boost::shared_ptr<Playlist> pl = (*a)->region()->playlist();
 
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*a);
                if (arv)
@@ -213,7 +132,7 @@ Editor::split_regions_at (jack_nframes_t where, RegionSelection& regions)
                         XMLNode &before = pl->get_state();
                        pl->split_region ((*a)->region(), where);
                         XMLNode &after = pl->get_state();
-                        session->add_command(new MementoCommand<Playlist>(*pl, before, after));
+                        session->add_command(new MementoCommand<Playlist>(*pl, &before, &after));
                }
 
                a = tmp;
@@ -230,22 +149,22 @@ Editor::remove_clicked_region ()
                return;
        }
 
-       Playlist* playlist = clicked_audio_trackview->playlist();
+       boost::shared_ptr<Playlist> playlist = clicked_audio_trackview->playlist();
        
        begin_reversible_command (_("remove region"));
         XMLNode &before = playlist->get_state();
-       playlist->remove_region (&clicked_regionview->region());
+       playlist->remove_region (clicked_regionview->region());
         XMLNode &after = playlist->get_state();
-       session->add_command(new MementoCommand<Playlist>(*playlist, before, after));
+       session->add_command(new MementoCommand<Playlist>(*playlist, &before, &after));
        commit_reversible_command ();
 }
 
 void
 Editor::destroy_clicked_region ()
 {
-       int32_t selected = selection->regions.size();
+       uint32_t selected = selection->regions.size();
 
-       if (!session || clicked_regionview == 0 && selected == 0) {
+       if (!session || !selected) {
                return;
        }
 
@@ -272,44 +191,39 @@ Do you really want to destroy %1 ?"),
                return;
        }
 
-       if (selected > 0) {
-               list<Region*> r;
+       if (selected) {
+               list<boost::shared_ptr<Region> > r;
 
                for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       r.push_back (&(*i)->region());
+                       r.push_back ((*i)->region());
                }
 
                session->destroy_regions (r);
-
-       } else if (clicked_regionview) {
-               session->destroy_region (&clicked_regionview->region());
        } 
 }
 
-Region *
+boost::shared_ptr<Region>
 Editor::select_region_for_operation (int dir, TimeAxisView **tv)
 {
        RegionView* rv;
-       Region *region;
-       jack_nframes_t start = 0;
+       boost::shared_ptr<Region> region;
+       nframes_t start = 0;
 
        if (selection->time.start () == selection->time.end_frame ()) {
                
                /* no current selection-> is there a selected regionview? */
 
                if (selection->regions.empty()) {
-                       return 0;
+                       return region;
                }
 
        } 
 
-       region = 0;
-
        if (!selection->regions.empty()) {
 
                rv = *(selection->regions.begin());
                (*tv) = &rv->get_time_axis_view();
-               region = &rv->region();
+               region = rv->region();
 
        } else if (!selection->tracks.empty()) {
 
@@ -318,10 +232,10 @@ Editor::select_region_for_operation (int dir, TimeAxisView **tv)
                RouteTimeAxisView* rtv;
 
                if ((rtv = dynamic_cast<RouteTimeAxisView*> (*tv)) != 0) {
-                       Playlist *pl;
+                       boost::shared_ptr<Playlist> pl;
                        
                        if ((pl = rtv->playlist()) == 0) {
-                               return 0;
+                               return region;
                        }
                        
                        region = pl->top_region_at (start);
@@ -335,8 +249,8 @@ void
 Editor::extend_selection_to_end_of_region (bool next)
 {
        TimeAxisView *tv;
-       Region *region;
-       jack_nframes_t start;
+       boost::shared_ptr<Region> region;
+       nframes_t start;
 
        if ((region = select_region_for_operation (next ? 1 : 0, &tv)) == 0) {
                return;
@@ -363,8 +277,8 @@ void
 Editor::extend_selection_to_start_of_region (bool previous)
 {
        TimeAxisView *tv;
-       Region *region;
-       jack_nframes_t end;
+       boost::shared_ptr<Region> region;
+       nframes_t end;
 
        if ((region = select_region_for_operation (previous ? -1 : 0, &tv)) == 0) {
                return;
@@ -391,8 +305,8 @@ Editor::extend_selection_to_start_of_region (bool previous)
 void
 Editor::nudge_forward (bool next)
 {
-       jack_nframes_t distance;
-       jack_nframes_t next_distance;
+       nframes_t distance;
+       nframes_t next_distance;
 
        if (!session) return;
        
@@ -401,18 +315,18 @@ Editor::nudge_forward (bool next)
                begin_reversible_command (_("nudge forward"));
 
                for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       Region& r ((*i)->region());
+                       boost::shared_ptr<Region> r ((*i)->region());
                        
-                       distance = get_nudge_distance (r.position(), next_distance);
+                       distance = get_nudge_distance (r->position(), next_distance);
 
                        if (next) {
                                distance = next_distance;
                        }
 
-                        XMLNode &before = r.playlist()->get_state();
-                       r.set_position (r.position() + distance, this);
-                        XMLNode &after = r.playlist()->get_state();
-                       session->add_command (new MementoCommand<Playlist>(*(r.playlist()), before, after));
+                        XMLNode &before = r->playlist()->get_state();
+                       r->set_position (r->position() + distance, this);
+                        XMLNode &after = r->playlist()->get_state();
+                       session->add_command (new MementoCommand<Playlist>(*(r->playlist()), &before, &after));
                }
 
                commit_reversible_command ();
@@ -426,8 +340,8 @@ Editor::nudge_forward (bool next)
 void
 Editor::nudge_backward (bool next)
 {
-       jack_nframes_t distance;
-       jack_nframes_t next_distance;
+       nframes_t distance;
+       nframes_t next_distance;
 
        if (!session) return;
        
@@ -436,23 +350,23 @@ Editor::nudge_backward (bool next)
                begin_reversible_command (_("nudge forward"));
 
                for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       Region& r ((*i)->region());
+                       boost::shared_ptr<Region> r ((*i)->region());
 
-                       distance = get_nudge_distance (r.position(), next_distance);
+                       distance = get_nudge_distance (r->position(), next_distance);
                        
                        if (next) {
                                distance = next_distance;
                        }
 
-                        XMLNode &before = r.playlist()->get_state();
+                        XMLNode &before = r->playlist()->get_state();
                        
-                       if (r.position() > distance) {
-                               r.set_position (r.position() - distance, this);
+                       if (r->position() > distance) {
+                               r->set_position (r->position() - distance, this);
                        } else {
-                               r.set_position (0, this);
+                               r->set_position (0, this);
                        }
-                        XMLNode &after = r.playlist()->get_state();
-                       session->add_command(new MementoCommand<Playlist>(*(r.playlist()), before, after));
+                        XMLNode &after = r->playlist()->get_state();
+                       session->add_command(new MementoCommand<Playlist>(*(r->playlist()), &before, &after));
                }
 
                commit_reversible_command ();
@@ -472,7 +386,7 @@ Editor::nudge_backward (bool next)
 void
 Editor::nudge_forward_capture_offset ()
 {
-       jack_nframes_t distance;
+       nframes_t distance;
 
        if (!session) return;
        
@@ -483,12 +397,12 @@ Editor::nudge_forward_capture_offset ()
                distance = session->worst_output_latency();
 
                for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       Region& r ((*i)->region());
+                       boost::shared_ptr<Region> r ((*i)->region());
                        
-                       XMLNode &before = r.playlist()->get_state();
-                       r.set_position (r.position() + distance, this);
-                       XMLNode &after = r.playlist()->get_state();
-                       session->add_command(new MementoCommand<Playlist>(*(r.playlist()), before, after));
+                       XMLNode &before = r->playlist()->get_state();
+                       r->set_position (r->position() + distance, this);
+                       XMLNode &after = r->playlist()->get_state();
+                       session->add_command(new MementoCommand<Playlist>(*(r->playlist()), &before, &after));
                }
 
                commit_reversible_command ();
@@ -499,7 +413,7 @@ Editor::nudge_forward_capture_offset ()
 void
 Editor::nudge_backward_capture_offset ()
 {
-       jack_nframes_t distance;
+       nframes_t distance;
 
        if (!session) return;
        
@@ -510,17 +424,17 @@ Editor::nudge_backward_capture_offset ()
                distance = session->worst_output_latency();
 
                for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       Region& r ((*i)->region());
+                       boost::shared_ptr<Region> r ((*i)->region());
 
-                        XMLNode &before = r.playlist()->get_state();
+                        XMLNode &before = r->playlist()->get_state();
                        
-                       if (r.position() > distance) {
-                               r.set_position (r.position() - distance, this);
+                       if (r->position() > distance) {
+                               r->set_position (r->position() - distance, this);
                        } else {
-                               r.set_position (0, this);
+                               r->set_position (0, this);
                        }
-                        XMLNode &after = r.playlist()->get_state();
-                       session->add_command(new MementoCommand<Playlist>(*(r.playlist()), before, after));
+                        XMLNode &after = r->playlist()->get_state();
+                       session->add_command(new MementoCommand<Playlist>(*(r->playlist()), &before, &after));
                }
 
                commit_reversible_command ();
@@ -545,9 +459,9 @@ Editor::move_to_end ()
 void
 Editor::build_region_boundary_cache ()
 {
-       jack_nframes_t pos = 0;
+       nframes_t pos = 0;
        RegionPoint point;
-       Region *r;
+       boost::shared_ptr<Region> r;
        TrackViewList tracks;
 
        region_boundary_cache.clear ();
@@ -601,7 +515,7 @@ Editor::build_region_boundary_cache ()
                        }
                }
 
-               jack_nframes_t rpos;
+               nframes_t rpos;
                
                switch (snap_type) {
                case SnapToRegionStart:
@@ -643,23 +557,23 @@ Editor::build_region_boundary_cache ()
        }
 }
 
-Region*
-Editor::find_next_region (jack_nframes_t frame, RegionPoint point, int32_t dir, TrackViewList& tracks, TimeAxisView **ontrack)
+boost::shared_ptr<Region>
+Editor::find_next_region (nframes_t frame, RegionPoint point, int32_t dir, TrackViewList& tracks, TimeAxisView **ontrack)
 {
        TrackViewList::iterator i;
-       jack_nframes_t closest = max_frames;
-       Region* ret = 0;
-       jack_nframes_t rpos = 0;
+       nframes_t closest = max_frames;
+       boost::shared_ptr<Region> ret;
+       nframes_t rpos = 0;
 
        float track_speed;
-       jack_nframes_t track_frame;
+       nframes_t track_frame;
        AudioTimeAxisView *atav;
 
        for (i = tracks.begin(); i != tracks.end(); ++i) {
 
-               jack_nframes_t distance;
-               Region* r;
-
+               nframes_t distance;
+               boost::shared_ptr<Region> r;
+               
                track_speed = 1.0f;
                if ( (atav = dynamic_cast<AudioTimeAxisView*>(*i)) != 0 ) {
                        if (atav->get_diskstream()!=0)
@@ -708,8 +622,8 @@ Editor::find_next_region (jack_nframes_t frame, RegionPoint point, int32_t dir,
 void
 Editor::cursor_to_region_point (Cursor* cursor, RegionPoint point, int32_t dir)
 {
-       Region* r;
-       jack_nframes_t pos = cursor->current_frame;
+       boost::shared_ptr<Region> r;
+       nframes_t pos = cursor->current_frame;
 
        if (!session) {
                return;
@@ -788,7 +702,7 @@ Editor::cursor_to_previous_region_point (Cursor* cursor, RegionPoint point)
 void
 Editor::cursor_to_selection_start (Cursor *cursor)
 {
-       jack_nframes_t pos = 0;
+       nframes_t pos = 0;
        switch (mouse_mode) {
        case MouseObject:
                if (!selection->regions.empty()) {
@@ -816,7 +730,7 @@ Editor::cursor_to_selection_start (Cursor *cursor)
 void
 Editor::cursor_to_selection_end (Cursor *cursor)
 {
-       jack_nframes_t pos = 0;
+       nframes_t pos = 0;
 
        switch (mouse_mode) {
        case MouseObject:
@@ -845,8 +759,8 @@ Editor::cursor_to_selection_end (Cursor *cursor)
 void
 Editor::playhead_backward ()
 {
-       jack_nframes_t pos;
-       jack_nframes_t cnt;
+       nframes_t pos;
+       nframes_t cnt;
        float prefix;
        bool was_floating;
 
@@ -854,15 +768,15 @@ Editor::playhead_backward ()
                cnt = 1;
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate ());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate ());
                } else {
-                       cnt = (jack_nframes_t) prefix;
+                       cnt = (nframes_t) prefix;
                }
        }
 
        pos = playhead_cursor->current_frame;
 
-       if ((jack_nframes_t) pos < cnt) {
+       if ((nframes_t) pos < cnt) {
                pos = 0;
        } else {
                pos -= cnt;
@@ -879,8 +793,8 @@ Editor::playhead_backward ()
 void
 Editor::playhead_forward ()
 {
-       jack_nframes_t pos;
-       jack_nframes_t cnt;
+       nframes_t pos;
+       nframes_t cnt;
        bool was_floating;
        float prefix;
 
@@ -888,9 +802,9 @@ Editor::playhead_forward ()
                cnt = 1;
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate ());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate ());
                } else {
-                       cnt = (jack_nframes_t) floor (prefix);
+                       cnt = (nframes_t) floor (prefix);
                }
        }
 
@@ -919,8 +833,8 @@ Editor::cursor_align (bool playhead_to_edit)
 void
 Editor::edit_cursor_backward ()
 {
-       jack_nframes_t pos;
-       jack_nframes_t cnt;
+       nframes_t pos;
+       nframes_t cnt;
        float prefix;
        bool was_floating;
 
@@ -928,15 +842,15 @@ Editor::edit_cursor_backward ()
                cnt = 1;
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate ());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate ());
                } else {
-                       cnt = (jack_nframes_t) prefix;
+                       cnt = (nframes_t) prefix;
                }
        }
 
        pos = edit_cursor->current_frame;
 
-       if ((jack_nframes_t) pos < cnt) {
+       if ((nframes_t) pos < cnt) {
                pos = 0;
        } else {
                pos -= cnt;
@@ -948,8 +862,8 @@ Editor::edit_cursor_backward ()
 void
 Editor::edit_cursor_forward ()
 {
-       jack_nframes_t pos;
-       jack_nframes_t cnt;
+       nframes_t pos;
+       nframes_t cnt;
        bool was_floating;
        float prefix;
 
@@ -957,9 +871,9 @@ Editor::edit_cursor_forward ()
                cnt = 1;
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate ());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate ());
                } else {
-                       cnt = (jack_nframes_t) floor (prefix);
+                       cnt = (nframes_t) floor (prefix);
                }
        }
 
@@ -972,16 +886,16 @@ Editor::goto_frame ()
 {
        float prefix;
        bool was_floating;
-       jack_nframes_t frame;
+       nframes_t frame;
 
        if (get_prefix (prefix, was_floating)) {
                return;
        }
 
        if (was_floating) {
-               frame = (jack_nframes_t) floor (prefix * session->frame_rate());
+               frame = (nframes_t) floor (prefix * session->frame_rate());
        } else {
-               frame = (jack_nframes_t) floor (prefix);
+               frame = (nframes_t) floor (prefix);
        }
 
        session->request_locate (frame);
@@ -990,19 +904,19 @@ Editor::goto_frame ()
 void
 Editor::scroll_backward (float pages)
 {
-       jack_nframes_t frame;
-       jack_nframes_t one_page = (jack_nframes_t) rint (canvas_width * frames_per_unit);
+       nframes_t frame;
+       nframes_t one_page = (nframes_t) rint (canvas_width * frames_per_unit);
        bool was_floating;
        float prefix;
-       jack_nframes_t cnt;
+       nframes_t cnt;
        
        if (get_prefix (prefix, was_floating)) {
-               cnt = (jack_nframes_t) floor (pages * one_page);
+               cnt = (nframes_t) floor (pages * one_page);
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate());
                } else {
-                       cnt = (jack_nframes_t) floor (prefix * one_page);
+                       cnt = (nframes_t) floor (prefix * one_page);
                }
        }
 
@@ -1018,24 +932,24 @@ Editor::scroll_backward (float pages)
 void
 Editor::scroll_forward (float pages)
 {
-       jack_nframes_t frame;
-       jack_nframes_t one_page = (jack_nframes_t) rint (canvas_width * frames_per_unit);
+       nframes_t frame;
+       nframes_t one_page = (nframes_t) rint (canvas_width * frames_per_unit);
        bool was_floating;
        float prefix;
-       jack_nframes_t cnt;
+       nframes_t cnt;
        
        if (get_prefix (prefix, was_floating)) {
-               cnt = (jack_nframes_t) floor (pages * one_page);
+               cnt = (nframes_t) floor (pages * one_page);
        } else {
                if (was_floating) {
-                       cnt = (jack_nframes_t) floor (prefix * session->frame_rate());
+                       cnt = (nframes_t) floor (prefix * session->frame_rate());
                } else {
-                       cnt = (jack_nframes_t) floor (prefix * one_page);
+                       cnt = (nframes_t) floor (prefix * one_page);
                }
        }
 
-       if (ULONG_MAX - cnt < leftmost_frame) {
-               frame = ULONG_MAX - cnt;
+       if (max_frames - cnt < leftmost_frame) {
+               frame = max_frames - cnt;
        } else {
                frame = leftmost_frame + cnt;
        }
@@ -1112,9 +1026,9 @@ Editor::temporal_zoom_step (bool coarser)
        nfpu = frames_per_unit;
        
        if (coarser) { 
-               nfpu *= 2.0;
+               nfpu *= 1.61803399;
        } else { 
-               nfpu = max(1.0,(nfpu/2.0));
+               nfpu = max(1.0,(nfpu/1.61803399));
        }
 
        temporal_zoom (nfpu);
@@ -1125,17 +1039,17 @@ Editor::temporal_zoom (gdouble fpu)
 {
        if (!session) return;
        
-       jack_nframes_t current_page = current_page_frames();
-       jack_nframes_t current_leftmost = leftmost_frame;
-       jack_nframes_t current_rightmost;
-       jack_nframes_t current_center;
-       jack_nframes_t new_page;
-       jack_nframes_t leftmost_after_zoom = 0;
+       nframes_t current_page = current_page_frames();
+       nframes_t current_leftmost = leftmost_frame;
+       nframes_t current_rightmost;
+       nframes_t current_center;
+       nframes_t new_page;
+       nframes_t leftmost_after_zoom = 0;
        double nfpu;
 
        nfpu = fpu;
        
-       new_page = (jack_nframes_t) floor (canvas_width * nfpu);
+       new_page = (nframes_t) floor (canvas_width * nfpu);
 
        switch (zoom_focus) {
        case ZoomFocusLeft:
@@ -1171,7 +1085,7 @@ Editor::temporal_zoom (gdouble fpu)
 
        case ZoomFocusEdit:
                /* try to keep the edit cursor in the center */
-               if (edit_cursor->current_frame > leftmost_frame + (new_page/2)) {
+               if (edit_cursor->current_frame > new_page/2) {
                        leftmost_after_zoom = edit_cursor->current_frame - (new_page/2);
                } else {
                        leftmost_after_zoom = 0;
@@ -1199,8 +1113,8 @@ Editor::temporal_zoom_selection ()
                return;
        }
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
 
        temporal_zoom_by_frame (start, end, "zoom to selection");
 }
@@ -1216,7 +1130,7 @@ Editor::temporal_zoom_session ()
 }
 
 void
-Editor::temporal_zoom_by_frame (jack_nframes_t start, jack_nframes_t end, const string & op)
+Editor::temporal_zoom_by_frame (nframes_t start, nframes_t end, const string & op)
 {
        if (!session) return;
 
@@ -1224,7 +1138,7 @@ Editor::temporal_zoom_by_frame (jack_nframes_t start, jack_nframes_t end, const
                return;
        }
 
-       jack_nframes_t range = end - start;
+       nframes_t range = end - start;
 
        double new_fpu = (double)range / (double)canvas_width;
 //     double p2 = 1.0;
@@ -1234,9 +1148,9 @@ Editor::temporal_zoom_by_frame (jack_nframes_t start, jack_nframes_t end, const
 //     }
 //     new_fpu = p2;
        
-       jack_nframes_t new_page = (jack_nframes_t) floor (canvas_width * new_fpu);
-       jack_nframes_t middle = (jack_nframes_t) floor( (double)start + ((double)range / 2.0f ));
-       jack_nframes_t new_leftmost = (jack_nframes_t) floor( (double)middle - ((double)new_page/2.0f));
+       nframes_t new_page = (nframes_t) floor (canvas_width * new_fpu);
+       nframes_t middle = (nframes_t) floor( (double)start + ((double)range / 2.0f ));
+       nframes_t new_leftmost = (nframes_t) floor( (double)middle - ((double)new_page/2.0f));
 
        if (new_leftmost > middle) new_leftmost = 0;
 
@@ -1249,26 +1163,26 @@ Editor::temporal_zoom_by_frame (jack_nframes_t start, jack_nframes_t end, const
 }
 
 void 
-Editor::temporal_zoom_to_frame (bool coarser, jack_nframes_t frame)
+Editor::temporal_zoom_to_frame (bool coarser, nframes_t frame)
 {
        if (!session) return;
        
-       jack_nframes_t range_before = frame - leftmost_frame;
+       double range_before = frame - leftmost_frame;
        double new_fpu;
        
        new_fpu = frames_per_unit;
        
        if (coarser) { 
-               new_fpu *= 2.0;
-               range_before *= 2;
+               new_fpu *= 1.61803399;
+               range_before *= 1.61803399;
        } else { 
-               new_fpu = max(1.0,(new_fpu/2.0));
-               range_before /= 2;
+               new_fpu = max(1.0,(new_fpu/1.61803399));
+               range_before /= 1.61803399;
        }
 
        if (new_fpu == frames_per_unit) return;
 
-       jack_nframes_t new_leftmost = frame - range_before;
+       nframes_t new_leftmost = frame - (nframes_t)range_before;
 
        if (new_leftmost > frame) new_leftmost = 0;
 
@@ -1283,6 +1197,8 @@ Editor::temporal_zoom_to_frame (bool coarser, jack_nframes_t frame)
 void
 Editor::add_location_from_selection ()
 {
+       string rangename;
+
        if (selection->time.empty()) {
                return;
        }
@@ -1291,30 +1207,34 @@ Editor::add_location_from_selection ()
                return;
        }
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
 
-       Location *location = new Location (start, end, "selection");
+       session->locations()->next_available_name(rangename,"selection");
+       Location *location = new Location (start, end, rangename, Location::IsRangeMarker);
 
        session->begin_reversible_command (_("add marker"));
         XMLNode &before = session->locations()->get_state();
        session->locations()->add (location, true);
         XMLNode &after = session->locations()->get_state();
-       session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
 }
 
 void
 Editor::add_location_from_playhead_cursor ()
 {
-       jack_nframes_t where = session->audible_frame();
+       string markername;
+
+       nframes_t where = session->audible_frame();
        
-       Location *location = new Location (where, where, "mark", Location::IsMark);
+       session->locations()->next_available_name(markername,"mark");
+       Location *location = new Location (where, where, markername, Location::IsMark);
        session->begin_reversible_command (_("add marker"));
         XMLNode &before = session->locations()->get_state();
        session->locations()->add (location, true);
         XMLNode &after = session->locations()->get_state();
-       session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
 }
 
@@ -1326,14 +1246,14 @@ Editor::add_location_from_audio_region ()
        }
 
        RegionView* rv = *(selection->regions.begin());
-       Region& region = rv->region();
+       boost::shared_ptr<Region> region = rv->region();
        
-       Location *location = new Location (region.position(), region.last_frame(), region.name());
+       Location *location = new Location (region->position(), region->last_frame(), region->name(), Location::IsRangeMarker);
        session->begin_reversible_command (_("add marker"));
         XMLNode &before = session->locations()->get_state();
        session->locations()->add (location, true);
         XMLNode &after = session->locations()->get_state();
-       session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
 }
 
@@ -1358,6 +1278,9 @@ Editor::select_all_in_track (Selection::Operation op)
        case Selection::Extend:
                /* not defined yet */
                break;
+       case Selection::Add:
+               selection->add (touched);
+               break;
        }
 }
 
@@ -1374,6 +1297,7 @@ Editor::select_all (Selection::Operation op)
        }
        begin_reversible_command (_("select all"));
        switch (op) {
+       case Selection::Add:
        case Selection::Toggle:
                selection->add (touched);
                break;
@@ -1416,7 +1340,7 @@ Editor::invert_selection ()
 }
 
 bool
-Editor::select_all_within (jack_nframes_t start, jack_nframes_t end, double top, double bot, Selection::Operation op)
+Editor::select_all_within (nframes_t start, nframes_t end, double top, double bot, Selection::Operation op)
 {
        list<Selectable *> touched;
        
@@ -1431,6 +1355,7 @@ Editor::select_all_within (jack_nframes_t start, jack_nframes_t end, double top,
 
        begin_reversible_command (_("select all within"));
        switch (op) {
+       case Selection::Add:
        case Selection::Toggle:
                cerr << "toggle\n";
                selection->add (touched);
@@ -1459,10 +1384,10 @@ Editor::set_selection_from_audio_region ()
        }
 
        RegionView* rv = *(selection->regions.begin());
-       Region& region = rv->region();
+       boost::shared_ptr<Region> region = rv->region();
        
        begin_reversible_command (_("set selection from region"));
-       selection->set (0, region.position(), region.last_frame());
+       selection->set (0, region->position(), region->last_frame());
        commit_reversible_command ();
 
        set_mouse_mode (Editing::MouseRange, false);
@@ -1510,8 +1435,8 @@ Editor::select_all_selectables_using_time_selection ()
                return;
        }
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
 
        if (end - start < 1)  {
                return;
@@ -1577,8 +1502,8 @@ Editor::select_all_selectables_using_loop()
 void
 Editor::select_all_selectables_using_cursor (Cursor *cursor, bool after)
 {
-        jack_nframes_t start;
-       jack_nframes_t end;
+        nframes_t start;
+       nframes_t end;
        list<Selectable *> touched;
 
        if (after) {
@@ -1608,8 +1533,8 @@ Editor::select_all_selectables_using_cursor (Cursor *cursor, bool after)
 void
 Editor::select_all_selectables_between_cursors (Cursor *cursor, Cursor *other_cursor)
 {
-        jack_nframes_t start;
-       jack_nframes_t end;
+        nframes_t start;
+       nframes_t end;
        list<Selectable *> touched;
        bool  other_cursor_is_first = cursor->current_frame > other_cursor->current_frame;
 
@@ -1727,21 +1652,23 @@ Editor::jump_backward_to_mark ()
 void
 Editor::set_mark ()
 {
-       jack_nframes_t pos;
+       nframes_t pos;
        float prefix;
        bool was_floating;
+       string markername;
 
        if (get_prefix (prefix, was_floating)) {
                pos = session->audible_frame ();
        } else {
                if (was_floating) {
-                       pos = (jack_nframes_t) floor (prefix * session->frame_rate ());
+                       pos = (nframes_t) floor (prefix * session->frame_rate ());
                } else {
-                       pos = (jack_nframes_t) floor (prefix);
+                       pos = (nframes_t) floor (prefix);
                }
        }
 
-       session->locations()->add (new Location (pos, 0, "mark", Location::IsMark), true);
+       session->locations()->next_available_name(markername,"mark");
+       session->locations()->add (new Location (pos, 0, markername, Location::IsMark), true);
 }
 
 void
@@ -1752,7 +1679,7 @@ Editor::clear_markers ()
                 XMLNode &before = session->locations()->get_state();
                session->locations()->clear_markers ();
                 XMLNode &after = session->locations()->get_state();
-               session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+               session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
                session->commit_reversible_command ();
        }
 }
@@ -1773,7 +1700,7 @@ Editor::clear_ranges ()
                if (punchloc) session->locations()->add (punchloc);
                
                 XMLNode &after = session->locations()->get_state();
-               session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+               session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
                session->commit_reversible_command ();
        }
 }
@@ -1785,22 +1712,44 @@ Editor::clear_locations ()
         XMLNode &before = session->locations()->get_state();
        session->locations()->clear ();
         XMLNode &after = session->locations()->get_state();
-       session->add_command(new MementoCommand<Locations>(*(session->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
        session->locations()->clear ();
 }
 
+void
+Editor::unhide_markers ()
+{
+       for (LocationMarkerMap::iterator i = location_markers.begin(); i != location_markers.end(); ++i) {
+               Location *l = (*i).first;
+               if (l->is_hidden() && l->is_mark()) {
+                       l->set_hidden(false, this);
+               }
+       }
+}
+
+void
+Editor::unhide_ranges ()
+{
+       for (LocationMarkerMap::iterator i = location_markers.begin(); i != location_markers.end(); ++i) {
+               Location *l = (*i).first;
+               if (l->is_hidden() && l->is_range_marker()) { 
+                       l->set_hidden(false, this);
+               }
+       }
+}
+
 /* INSERT/REPLACE */
 
 void
-Editor::insert_region_list_drag (AudioRegion& region, int x, int y)
+Editor::insert_region_list_drag (boost::shared_ptr<AudioRegion> region, int x, int y)
 {
        double wx, wy;
        double cx, cy;
        TimeAxisView *tv;
-       jack_nframes_t where;
+       nframes_t where;
        AudioTimeAxisView *atv = 0;
-       Playlist *playlist;
+       boost::shared_ptr<Playlist> playlist;
        
        track_canvas.window_to_world (x, y, wx, wy);
        wx += horizontal_adjustment.get_value();
@@ -1830,20 +1779,26 @@ Editor::insert_region_list_drag (AudioRegion& region, int x, int y)
                return;
        }
        
+       cerr << "drop target playlist, UC  = " << playlist.use_count() << endl;
+
        snap_to (where);
        
        begin_reversible_command (_("insert dragged region"));
         XMLNode &before = playlist->get_state();
-       playlist->add_region (*(new AudioRegion (region)), where, 1.0);
-       session->add_command(new MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
+       cerr << "pre add target playlist, UC  = " << playlist.use_count() << endl;
+       playlist->add_region (RegionFactory::create (region), where, 1.0);
+       cerr << "post add target playlist, UC  = " << playlist.use_count() << endl;
+       session->add_command(new MementoCommand<Playlist>(*playlist, &before, &playlist->get_state()));
        commit_reversible_command ();
+
+       cerr << "post drop target playlist, UC  = " << playlist.use_count() << endl;
 }
 
 void
 Editor::insert_region_list_selection (float times)
 {
        RouteTimeAxisView *tv = 0;
-       Playlist *playlist;
+       boost::shared_ptr<Playlist> playlist;
 
        if (clicked_audio_trackview != 0) {
                tv = clicked_audio_trackview;
@@ -1865,16 +1820,23 @@ Editor::insert_region_list_selection (float times)
                return;
        }
        
-       TreeModel::iterator i = region_list_display.get_selection()->get_selected();
-       Region* region = (*i)[region_list_columns.region];
+       TreeView::Selection::ListHandle_Path rows = selected->get_selected_rows ();
 
-       begin_reversible_command (_("insert region"));
-        XMLNode &before = playlist->get_state();
-       playlist->add_region (*(createRegion (*region)), edit_cursor->current_frame, times);
-       session->add_command(new MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
-       commit_reversible_command ();
-}
+       /* only one row selected, so rows.begin() is it */
+
+       TreeIter iter;
 
+       if ((iter = region_list_model->get_iter (*rows.begin()))) {
+
+               boost::shared_ptr<Region> region = (*iter)[region_list_columns.region];
+               
+               begin_reversible_command (_("insert region"));
+               XMLNode &before = playlist->get_state();
+               playlist->add_region ((RegionFactory::create (region)), edit_cursor->current_frame, times);
+               session->add_command(new MementoCommand<Playlist>(*playlist, &before, &playlist->get_state()));
+               commit_reversible_command ();
+       } 
+}
 
 /* BUILT-IN EFFECTS */
 
@@ -1900,9 +1862,9 @@ Editor::toggle_playback (bool with_abort)
                return;
        }
 
-       switch (session->slave_source()) {
-       case Session::None:
-       case Session::JACK:
+       switch (Config->get_slave_source()) {
+       case None:
+       case JACK:
                break;
        default:
                /* transport controlled by the master */
@@ -1916,8 +1878,8 @@ Editor::toggle_playback (bool with_abort)
        
        if (session->transport_rolling()) {
                session->request_stop (with_abort);
-               if (session->get_auto_loop()) {
-                       session->request_auto_loop (false);
+               if (session->get_play_loop()) {
+                       session->request_play_loop (false);
                }
        } else {
                session->request_transport_speed (1.0f);
@@ -1930,6 +1892,12 @@ Editor::play_from_start ()
        session->request_locate (session->current_start_frame(), true);
 }
 
+void
+Editor::play_from_edit_cursor ()
+{
+       session->request_locate (edit_cursor->current_frame, true);
+}
+
 void
 Editor::play_selection ()
 {
@@ -1946,7 +1914,7 @@ Editor::play_selected_region ()
        if (!selection->regions.empty()) {
                RegionView *rv = *(selection->regions.begin());
 
-               session->request_bounded_roll (rv->region().position(), rv->region().last_frame());     
+               session->request_bounded_roll (rv->region()->position(), rv->region()->last_frame());   
        }
 }
 
@@ -1959,11 +1927,11 @@ Editor::loop_selected_region ()
 
                if ((tll = transport_loop_location()) != 0)  {
 
-                       tll->set (rv->region().position(), rv->region().last_frame());
+                       tll->set (rv->region()->position(), rv->region()->last_frame());
                        
                        // enable looping, reposition and start rolling
 
-                       session->request_auto_loop (true);
+                       session->request_play_loop (true);
                        session->request_locate (tll->start(), false);
                        session->request_transport_speed (1.0f);
                }
@@ -1993,33 +1961,11 @@ Editor::loop_location (Location& location)
                tll->set (location.start(), location.end());
 
                // enable looping, reposition and start rolling
-               session->request_auto_loop (true);
+               session->request_play_loop (true);
                session->request_locate (tll->start(), true);
        }
 }
 
-void 
-Editor::toggle_region_mute ()
-{
-       if (clicked_regionview) {
-               clicked_regionview->region().set_muted (!clicked_regionview->region().muted());
-       } else if (!selection->regions.empty()) {
-               bool yn = ! (*selection->regions.begin())->region().muted();
-               selection->foreach_region (&Region::set_muted, yn);
-       }
-}
-
-void
-Editor::toggle_region_opaque ()
-{
-       if (clicked_regionview) {
-               clicked_regionview->region().set_opaque (!clicked_regionview->region().opaque());
-       } else if (!selection->regions.empty()) {
-               bool yn = ! (*selection->regions.begin())->region().opaque();
-               selection->foreach_region (&Region::set_opaque, yn);
-       }
-}
-
 void
 Editor::raise_region ()
 {
@@ -2093,7 +2039,7 @@ Editor::rename_region ()
        Main::run ();
 
        if (region_renamed) {
-               (*selection->regions.begin())->region().set_name (entry.get_text());
+               (*selection->regions.begin())->region()->set_name (entry.get_text());
                redisplay_regions ();
        }
 }
@@ -2107,7 +2053,7 @@ Editor::rename_region_finished (bool status)
 }
 
 void
-Editor::audition_playlist_region_via_route (Region& region, Route& route)
+Editor::audition_playlist_region_via_route (boost::shared_ptr<Region> region, Route& route)
 {
        if (session->is_auditioning()) {
                session->cancel_audition ();
@@ -2120,7 +2066,7 @@ Editor::audition_playlist_region_via_route (Region& region, Route& route)
 
        route.set_solo (true, this);
        
-       session->request_bounded_roll (region.position(), region.position() + region.length());
+       session->request_bounded_roll (region->position(), region->position() + region->length());
        
        /* XXX how to unset the solo state ? */
 }
@@ -2135,7 +2081,7 @@ Editor::audition_selected_region ()
 }
 
 void
-Editor::audition_playlist_region_standalone (Region& region)
+Editor::audition_playlist_region_standalone (boost::shared_ptr<Region> region)
 {
        session->audition_region (region);
 }
@@ -2179,18 +2125,17 @@ Editor::region_from_selection ()
                return;
        }
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
 
-       jack_nframes_t selection_cnt = end - start + 1;
+       nframes_t selection_cnt = end - start + 1;
        
        for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-               AudioRegion *region;
-               AudioRegion *current;
-               Region* current_r;
-               Playlist *pl;
+               boost::shared_ptr<AudioRegion> current;
+               boost::shared_ptr<Region> current_r;
+               boost::shared_ptr<Playlist> pl;
 
-               jack_nframes_t internal_start;
+               nframes_t internal_start;
                string new_name;
 
                if ((pl = (*i)->playlist()) == 0) {
@@ -2201,32 +2146,32 @@ Editor::region_from_selection ()
                        continue;
                }
 
-               current = dynamic_cast<AudioRegion*> (current_r);
+               current = boost::dynamic_pointer_cast<AudioRegion> (current_r);
                // FIXME: audio only
                if (current != 0) {
                        internal_start = start - current->position();
                        session->region_name (new_name, current->name(), true);
-                       region = new AudioRegion (*current, internal_start, selection_cnt, new_name);
+                       boost::shared_ptr<Region> region (RegionFactory::create (current, internal_start, selection_cnt, new_name));
                }
        }
 }      
 
 void
-Editor::create_region_from_selection (vector<AudioRegion *>& new_regions)
+Editor::create_region_from_selection (vector<boost::shared_ptr<AudioRegion> >& new_regions)
 {
        if (selection->time.empty() || selection->tracks.empty()) {
                return;
        }
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
        
        for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
 
-               AudioRegion* current;
-               Region* current_r;
-               Playlist* playlist;
-               jack_nframes_t internal_start;
+               boost::shared_ptr<AudioRegion> current;
+               boost::shared_ptr<Region> current_r;
+               boost::shared_ptr<Playlist> playlist;
+               nframes_t internal_start;
                string new_name;
 
                if ((playlist = (*i)->playlist()) == 0) {
@@ -2237,14 +2182,14 @@ Editor::create_region_from_selection (vector<AudioRegion *>& new_regions)
                        continue;
                }
 
-               if ((current = dynamic_cast<AudioRegion*>(current_r)) == 0) {
+               if ((current = boost::dynamic_pointer_cast<AudioRegion>(current_r)) == 0) {
                        continue;
                }
        
                internal_start = start - current->position();
                session->region_name (new_name, current->name(), true);
                
-               new_regions.push_back (new AudioRegion (*current, internal_start, end - start + 1, new_name));
+               new_regions.push_back (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (current, internal_start, end - start + 1, new_name)));
        }
 }
 
@@ -2255,11 +2200,11 @@ Editor::split_multichannel_region ()
 
        AudioRegionView* clicked_arv = dynamic_cast<AudioRegionView*>(clicked_regionview);
        
-       if (!clicked_arv || clicked_arv->audio_region().n_channels() < 2) {
+       if (!clicked_arv || clicked_arv->audio_region()->n_channels() < 2) {
                return;
        }
 
-       clicked_arv->audio_region().separate_by_channel (*session, v);
+       clicked_arv->audio_region()->separate_by_channel (*session, v);
 
        /* nothing else to do, really */
 }
@@ -2280,7 +2225,7 @@ Editor::separate_region_from_selection ()
                return;
        }
 
-       Playlist *playlist;
+       boost::shared_ptr<Playlist> playlist;
                
        for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
 
@@ -2304,11 +2249,11 @@ Editor::separate_region_from_selection ()
                                        double speed = atv->get_diskstream()->speed();
 
                                        for (list<AudioRange>::iterator t = selection->time.begin(); t != selection->time.end(); ++t) {
-                                               playlist->partition ((jack_nframes_t)((*t).start * speed), (jack_nframes_t)((*t).end * speed), true);
+                                               playlist->partition ((nframes_t)((*t).start * speed), (nframes_t)((*t).end * speed), true);
                                        }
 
                                        if (doing_undo) 
-                                            session->add_command(new MementoCommand<Playlist>(*playlist, *before, playlist->get_state()));
+                                            session->add_command(new MementoCommand<Playlist>(*playlist, before, &playlist->get_state()));
                                }
                        }
                }
@@ -2326,7 +2271,7 @@ Editor::separate_regions_using_location (Location& loc)
                return;
        }
 
-       Playlist *playlist;
+       boost::shared_ptr<Playlist> playlist;
 
        /* XXX i'm unsure as to whether this should operate on selected tracks only 
           or the entire enchillada. uncomment the below line to correct the behaviour 
@@ -2357,9 +2302,9 @@ Editor::separate_regions_using_location (Location& loc)
                                        double speed = atv->get_diskstream()->speed();
 
 
-                                       playlist->partition ((jack_nframes_t)(loc.start() * speed), (jack_nframes_t)(loc.end() * speed), true);
+                                       playlist->partition ((nframes_t)(loc.start() * speed), (nframes_t)(loc.end() * speed), true);
                                        if (doing_undo) 
-                                            session->add_command(new MementoCommand<Playlist>(*playlist, *before, playlist->get_state()));
+                                            session->add_command(new MementoCommand<Playlist>(*playlist, before, &playlist->get_state()));
                                }
                        }
                }
@@ -2375,8 +2320,8 @@ Editor::crop_region_to_selection ()
                return;
        }
 
-       vector<Playlist*> playlists;
-       Playlist *playlist;
+       vector<boost::shared_ptr<Playlist> > playlists;
+       boost::shared_ptr<Playlist> playlist;
 
        if (clicked_trackview != 0) {
 
@@ -2406,15 +2351,15 @@ Editor::crop_region_to_selection ()
 
        if (!playlists.empty()) {
 
-               jack_nframes_t start;
-               jack_nframes_t end;
-               jack_nframes_t cnt;
+               nframes_t start;
+               nframes_t end;
+               nframes_t cnt;
 
                begin_reversible_command (_("trim to selection"));
 
-               for (vector<Playlist*>::iterator i = playlists.begin(); i != playlists.end(); ++i) {
+               for (vector<boost::shared_ptr<Playlist> >::iterator i = playlists.begin(); i != playlists.end(); ++i) {
                        
-                       Region *region;
+                       boost::shared_ptr<Region> region;
                        
                        start = selection->time.start();
 
@@ -2433,7 +2378,7 @@ Editor::crop_region_to_selection ()
                         XMLNode &before = (*i)->get_state();
                        region->trim_to (start, cnt, this);
                         XMLNode &after = (*i)->get_state();
-                       session->add_command (new MementoCommand<Playlist>(*(*i), before, after));
+                       session->add_command (new MementoCommand<Playlist>(*(*i), &before, &after));
                }
 
                commit_reversible_command ();
@@ -2443,7 +2388,7 @@ Editor::crop_region_to_selection ()
 void
 Editor::region_fill_track ()
 {
-       jack_nframes_t end;
+       nframes_t end;
 
        if (!session || selection->regions.empty()) {
                return;
@@ -2455,28 +2400,28 @@ Editor::region_fill_track ()
 
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
 
-               Region& region ((*i)->region());
+               boost::shared_ptr<Region> region ((*i)->region());
                
                // FIXME
-               AudioRegion* const ar = dynamic_cast<AudioRegion*>(&region);
+               boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(region);
                if (!ar)
                        continue;
 
-               Playlist* pl = region.playlist();
+               boost::shared_ptr<Playlist> pl = region->playlist();
 
-               if (end <= region.last_frame()) {
+               if (end <= region->last_frame()) {
                        return;
                }
 
-               double times = (double) (end - region.last_frame()) / (double) region.length();
+               double times = (double) (end - region->last_frame()) / (double) region->length();
 
                if (times == 0) {
                        return;
                }
 
                 XMLNode &before = pl->get_state();
-               pl->add_region (*(new AudioRegion (*ar)), ar->last_frame(), times);
-               session->add_command (new MementoCommand<Playlist>(*pl, before, pl->get_state()));
+               pl->add_region (RegionFactory::create (ar), ar->last_frame(), times);
+               session->add_command (new MementoCommand<Playlist>(*pl, &before, &pl->get_state()));
        }
 
        commit_reversible_command ();
@@ -2493,7 +2438,6 @@ Editor::region_fill_selection ()
                return;
        }
 
-       Region *region;
 
        Glib::RefPtr<TreeSelection> selected = region_list_display.get_selection();
 
@@ -2502,18 +2446,18 @@ Editor::region_fill_selection ()
        }
 
        TreeModel::iterator i = region_list_display.get_selection()->get_selected();
-       region = (*i)[region_list_columns.region];
+       boost::shared_ptr<Region> region = (*i)[region_list_columns.region];
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
 
-       Playlist *playlist; 
+       boost::shared_ptr<Playlist> playlist; 
 
        if (selection->tracks.empty()) {
                return;
        }
 
-       jack_nframes_t selection_length = end - start;
+       nframes_t selection_length = end - start;
        float times = (float)selection_length / region->length();
        
        begin_reversible_command (_("fill selection"));
@@ -2525,26 +2469,26 @@ Editor::region_fill_selection ()
                }               
                
                 XMLNode &before = playlist->get_state();
-               playlist->add_region (*(createRegion (*region)), start, times);
-               session->add_command (new MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
+               playlist->add_region (RegionFactory::create (region), start, times);
+               session->add_command (new MementoCommand<Playlist>(*playlist, &before, &playlist->get_state()));
        }
        
        commit_reversible_command ();                   
 }
 
 void
-Editor::set_a_regions_sync_position (Region& region, jack_nframes_t position)
+Editor::set_a_regions_sync_position (boost::shared_ptr<Region> region, nframes_t position)
 {
 
-       if (!region.covers (position)) {
+       if (!region->covers (position)) {
          error << _("Programming error. that region doesn't cover that position") << __FILE__ << " +" << __LINE__ << endmsg;
                return;
        }
        begin_reversible_command (_("set region sync position"));
-        XMLNode &before = region.playlist()->get_state();
-       region.set_sync_position (position);
-        XMLNode &after = region.playlist()->get_state();
-       session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+        XMLNode &before = region->playlist()->get_state();
+       region->set_sync_position (position);
+        XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
        commit_reversible_command ();
 }
 
@@ -2555,17 +2499,17 @@ Editor::set_region_sync_from_edit_cursor ()
                return;
        }
 
-       if (!clicked_regionview->region().covers (edit_cursor->current_frame)) {
+       if (!clicked_regionview->region()->covers (edit_cursor->current_frame)) {
                error << _("Place the edit cursor at the desired sync point") << endmsg;
                return;
        }
 
-       Region& region (clicked_regionview->region());
+       boost::shared_ptr<Region> region (clicked_regionview->region());
        begin_reversible_command (_("set sync from edit cursor"));
-        XMLNode &before = region.playlist()->get_state();
-       region.set_sync_position (edit_cursor->current_frame);
-        XMLNode &after = region.playlist()->get_state();
-       session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+        XMLNode &before = region->playlist()->get_state();
+       region->set_sync_position (edit_cursor->current_frame);
+        XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
        commit_reversible_command ();
 }
 
@@ -2573,12 +2517,12 @@ void
 Editor::remove_region_sync ()
 {
        if (clicked_regionview) {
-               Region& region (clicked_regionview->region());
+               boost::shared_ptr<Region> region (clicked_regionview->region());
                begin_reversible_command (_("remove sync"));
-                XMLNode &before = region.playlist()->get_state();
-               region.clear_sync_position ();
-                XMLNode &after = region.playlist()->get_state();
-               session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+                XMLNode &before = region->playlist()->get_state();
+               region->clear_sync_position ();
+                XMLNode &after = region->playlist()->get_state();
+               session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
                commit_reversible_command ();
        }
 }
@@ -2591,10 +2535,10 @@ Editor::naturalize ()
        }
        begin_reversible_command (_("naturalize"));
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                XMLNode &before = (*i)->region().get_state();
-               (*i)->region().move_to_natural_position (this);
-                XMLNode &after = (*i)->region().get_state();
-               session->add_command (new MementoCommand<Region>((*i)->region(), before, after));
+                XMLNode &before = (*i)->region()->get_state();
+               (*i)->region()->move_to_natural_position (this);
+                XMLNode &after = (*i)->region()->get_state();
+               session->add_command (new MementoCommand<Region>(*((*i)->region().get()), &before, &after));
        }
        commit_reversible_command ();
 }
@@ -2613,36 +2557,36 @@ Editor::align_relative (RegionPoint what)
 
 struct RegionSortByTime {
     bool operator() (const AudioRegionView* a, const AudioRegionView* b) {
-           return a->region().position() < b->region().position();
+           return a->region()->position() < b->region()->position();
     }
 };
 
 void
-Editor::align_selection_relative (RegionPoint point, jack_nframes_t position)
+Editor::align_selection_relative (RegionPoint point, nframes_t position)
 {
        if (selection->regions.empty()) {
                return;
        }
 
-       jack_nframes_t distance;
-       jack_nframes_t pos = 0;
+       nframes_t distance;
+       nframes_t pos = 0;
        int dir;
 
        list<RegionView*> sorted;
        selection->regions.by_position (sorted);
-       Region& r ((*sorted.begin())->region());
+       boost::shared_ptr<Region> r ((*sorted.begin())->region());
 
        switch (point) {
        case Start:
-               pos = r.first_frame ();
+               pos = r->first_frame ();
                break;
 
        case End:
-               pos = r.last_frame();
+               pos = r->last_frame();
                break;
 
        case SyncPoint:
-               pos = r.adjust_to_sync (r.first_frame());
+               pos = r->adjust_to_sync (r->first_frame());
                break;  
        }
 
@@ -2658,18 +2602,18 @@ Editor::align_selection_relative (RegionPoint point, jack_nframes_t position)
 
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
 
-               Region& region ((*i)->region());
+               boost::shared_ptr<Region> region ((*i)->region());
 
-                XMLNode &before = region.playlist()->get_state();
+                XMLNode &before = region->playlist()->get_state();
                
                if (dir > 0) {
-                       region.set_position (region.position() + distance, this);
+                       region->set_position (region->position() + distance, this);
                } else {
-                       region.set_position (region.position() - distance, this);
+                       region->set_position (region->position() - distance, this);
                }
 
-                XMLNode &after = region.playlist()->get_state();
-               session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+                XMLNode &after = region->playlist()->get_state();
+               session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
 
        }
 
@@ -2677,7 +2621,7 @@ Editor::align_selection_relative (RegionPoint point, jack_nframes_t position)
 }
 
 void
-Editor::align_selection (RegionPoint point, jack_nframes_t position)
+Editor::align_selection (RegionPoint point, nframes_t position)
 {
        if (selection->regions.empty()) {
                return;
@@ -2693,7 +2637,7 @@ Editor::align_selection (RegionPoint point, jack_nframes_t position)
 }
 
 void
-Editor::align_region (Region& region, RegionPoint point, jack_nframes_t position)
+Editor::align_region (boost::shared_ptr<Region> region, RegionPoint point, nframes_t position)
 {
        begin_reversible_command (_("align region"));
        align_region_internal (region, point, position);
@@ -2701,28 +2645,28 @@ Editor::align_region (Region& region, RegionPoint point, jack_nframes_t position
 }
 
 void
-Editor::align_region_internal (Region& region, RegionPoint point, jack_nframes_t position)
+Editor::align_region_internal (boost::shared_ptr<Region> region, RegionPoint point, nframes_t position)
 {
-       XMLNode &before = region.playlist()->get_state();
+       XMLNode &before = region->playlist()->get_state();
 
        switch (point) {
        case SyncPoint:
-               region.set_position (region.adjust_to_sync (position), this);
+               region->set_position (region->adjust_to_sync (position), this);
                break;
 
        case End:
-               if (position > region.length()) {
-                       region.set_position (position - region.length(), this);
+               if (position > region->length()) {
+                       region->set_position (position - region->length(), this);
                }
                break;
 
        case Start:
-               region.set_position (position, this);
+               region->set_position (position, this);
                break;
        }
 
-       XMLNode &after = region.playlist()->get_state();
-       session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+       XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
 }      
 
 void
@@ -2732,7 +2676,7 @@ Editor::trim_region_to_edit_cursor ()
                return;
        }
 
-       Region& region (clicked_regionview->region());
+       boost::shared_ptr<Region> region (clicked_regionview->region());
 
        float speed = 1.0f;
        AudioTimeAxisView *atav;
@@ -2744,10 +2688,10 @@ Editor::trim_region_to_edit_cursor ()
        }
 
        begin_reversible_command (_("trim to edit"));
-        XMLNode &before = region.playlist()->get_state();
-       region.trim_end( session_frame_to_track_frame(edit_cursor->current_frame, speed), this);
-        XMLNode &after = region.playlist()->get_state();
-       session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+        XMLNode &before = region->playlist()->get_state();
+       region->trim_end( session_frame_to_track_frame(edit_cursor->current_frame, speed), this);
+        XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
        commit_reversible_command ();
 }
 
@@ -2758,7 +2702,7 @@ Editor::trim_region_from_edit_cursor ()
                return;
        }
 
-       Region& region (clicked_regionview->region());
+       boost::shared_ptr<Region> region (clicked_regionview->region());
 
        float speed = 1.0f;
        AudioTimeAxisView *atav;
@@ -2770,10 +2714,10 @@ Editor::trim_region_from_edit_cursor ()
        }
 
        begin_reversible_command (_("trim to edit"));
-        XMLNode &before = region.playlist()->get_state();
-       region.trim_front ( session_frame_to_track_frame(edit_cursor->current_frame, speed), this);
-        XMLNode &after = region.playlist()->get_state();
-       session->add_command(new MementoCommand<Playlist>(*(region.playlist()), before, after));
+        XMLNode &before = region->playlist()->get_state();
+       region->trim_front ( session_frame_to_track_frame(edit_cursor->current_frame, speed), this);
+        XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
        commit_reversible_command ();
 }
 
@@ -2859,9 +2803,9 @@ Editor::bounce_range_selection ()
 
        TrackViewList *views = get_valid_views (selection->time.track, selection->time.group);
 
-       jack_nframes_t start = selection->time[clicked_selection].start;
-       jack_nframes_t end = selection->time[clicked_selection].end;
-       jack_nframes_t cnt = end - start + 1;
+       nframes_t start = selection->time[clicked_selection].start;
+       nframes_t end = selection->time[clicked_selection].end;
+       nframes_t cnt = end - start + 1;
        
        begin_reversible_command (_("bounce range"));
 
@@ -2873,7 +2817,7 @@ Editor::bounce_range_selection ()
                        continue;
                }
                
-               Playlist* playlist;
+               boost::shared_ptr<Playlist> playlist;
                
                if ((playlist = atv->playlist()) == 0) {
                        return;
@@ -2888,7 +2832,7 @@ Editor::bounce_range_selection ()
                 XMLNode &before = playlist->get_state();
                atv->audio_track()->bounce_range (start, cnt, itt);
                 XMLNode &after = playlist->get_state();
-               session->add_command (new MementoCommand<Playlist> (*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist> (*playlist, &before, &after));
        }
        
        commit_reversible_command ();
@@ -2988,25 +2932,43 @@ Editor::cut_copy_points (CutCopyOp op)
        }
 }
 
+struct PlaylistState {
+    boost::shared_ptr<Playlist> playlist;
+    XMLNode*  before;
+};
+
+struct lt_playlist {
+    bool operator () (const PlaylistState& a, const PlaylistState& b) {
+           return a.playlist < b.playlist;
+    }
+};
+       
 void
 Editor::cut_copy_regions (CutCopyOp op)
 {
-        typedef std::map<AudioPlaylist*,AudioPlaylist*> PlaylistMapping;
+        typedef std::map<boost::shared_ptr<AudioPlaylist>,boost::shared_ptr<AudioPlaylist> > PlaylistMapping;
        PlaylistMapping pmap;
-       jack_nframes_t first_position = max_frames;
-       set<Playlist*> freezelist;
-       pair<set<Playlist*>::iterator,bool> insert_result;
+       nframes_t first_position = max_frames;
+
+       set<PlaylistState, lt_playlist> freezelist;
+       pair<set<PlaylistState, lt_playlist>::iterator,bool> insert_result;
 
        for (RegionSelection::iterator x = selection->regions.begin(); x != selection->regions.end(); ++x) {
-               first_position = min ((*x)->region().position(), first_position);
+               first_position = min ((*x)->region()->position(), first_position);
 
                if (op == Cut || op == Clear) {
-                       AudioPlaylist *pl = dynamic_cast<AudioPlaylist*>((*x)->region().playlist());
+                       boost::shared_ptr<AudioPlaylist> pl = boost::dynamic_pointer_cast<AudioPlaylist>((*x)->region()->playlist());
+
                        if (pl) {
-                               insert_result = freezelist.insert (pl);
+
+                               PlaylistState before;
+                               before.playlist = pl;
+                               before.before = &pl->get_state();
+                               
+                               insert_result = freezelist.insert (before);
+
                                if (insert_result.second) {
                                        pl->freeze ();
-                                        session->add_command (new MementoUndoCommand<Playlist>(*pl, pl->get_state()));
                                }
                        }
                }
@@ -3014,8 +2976,8 @@ Editor::cut_copy_regions (CutCopyOp op)
 
        for (RegionSelection::iterator x = selection->regions.begin(); x != selection->regions.end(); ) {
 
-               AudioPlaylist *pl = dynamic_cast<AudioPlaylist*>((*x)->region().playlist());
-               AudioPlaylist* npl;
+               boost::shared_ptr<AudioPlaylist> pl = boost::dynamic_pointer_cast<AudioPlaylist>((*x)->region()->playlist());
+               boost::shared_ptr<AudioPlaylist> npl;
                RegionSelection::iterator tmp;
                
                tmp = x;
@@ -3026,7 +2988,7 @@ Editor::cut_copy_regions (CutCopyOp op)
                        PlaylistMapping::iterator pi = pmap.find (pl);
                        
                        if (pi == pmap.end()) {
-                               npl = new AudioPlaylist (*session, "cutlist", true);
+                               npl = boost::dynamic_pointer_cast<AudioPlaylist> (PlaylistFactory::create (*session, "cutlist", true));
                                npl->freeze();
                                pmap[pl] = npl;
                        } else {
@@ -3034,23 +2996,23 @@ Editor::cut_copy_regions (CutCopyOp op)
                        }
 
                        // FIXME
-                       AudioRegion* const ar = dynamic_cast<AudioRegion*>(&(*x)->region());
+                       boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>((*x)->region());
                        switch (op) {
                        case Cut:
                                if (!ar) break;
 
-                               npl->add_region (*(new AudioRegion (*ar)), (*x)->region().position() - first_position);
-                               pl->remove_region (&((*x)->region()));
+                               npl->add_region (RegionFactory::create (ar), (*x)->region()->position() - first_position);
+                               pl->remove_region (((*x)->region()));
                                break;
 
                        case Copy:
                                if (!ar) break;
 
-                               npl->add_region (*(new AudioRegion (*ar)), (*x)->region().position() - first_position);
+                               npl->add_region (RegionFactory::create (ar), (*x)->region()->position() - first_position);
                                break;
 
                        case Clear:
-                               pl->remove_region (&((*x)->region()));
+                               pl->remove_region (((*x)->region()));
                                break;
                        }
                }
@@ -3058,7 +3020,7 @@ Editor::cut_copy_regions (CutCopyOp op)
                x = tmp;
        }
 
-       list<Playlist*> foo;
+       list<boost::shared_ptr<Playlist> > foo;
 
        for (PlaylistMapping::iterator i = pmap.begin(); i != pmap.end(); ++i) {
                foo.push_back (i->second);
@@ -3068,9 +3030,9 @@ Editor::cut_copy_regions (CutCopyOp op)
                cut_buffer->set (foo);
        }
        
-       for (set<Playlist*>::iterator pl = freezelist.begin(); pl != freezelist.end(); ++pl) {
-               (*pl)->thaw ();
-               session->add_command (new MementoRedoCommand<Playlist>(*(*pl), (*pl)->get_state()));
+       for (set<PlaylistState, lt_playlist>::iterator pl = freezelist.begin(); pl != freezelist.end(); ++pl) {
+               (*pl).playlist->thaw ();
+               session->add_command (new MementoCommand<Playlist>(*(*pl).playlist, (*pl).before, &(*pl).playlist->get_state()));
        }
 }
 
@@ -3104,13 +3066,13 @@ Editor::mouse_paste ()
        event.button.x = wx;
        event.button.y = wy;
        
-       jack_nframes_t where = event_frame (&event, 0, 0);
+       nframes_t where = event_frame (&event, 0, 0);
        snap_to (where);
        paste_internal (where, 1);
 }
 
 void
-Editor::paste_internal (jack_nframes_t position, float times)
+Editor::paste_internal (nframes_t position, float times)
 {
        bool commit = false;
 
@@ -3155,8 +3117,8 @@ Editor::paste_named_selection (float times)
        TreeModel::iterator i = selected->get_selected();
        NamedSelection* ns = (*i)[named_selection_columns.selection];
 
-       list<Playlist*>::iterator chunk;
-       list<Playlist*>::iterator tmp;
+       list<boost::shared_ptr<Playlist> >::iterator chunk;
+       list<boost::shared_ptr<Playlist> >::iterator tmp;
 
        chunk = ns->playlists.begin();
                
@@ -3165,8 +3127,8 @@ Editor::paste_named_selection (float times)
        for (t = selection->tracks.begin(); t != selection->tracks.end(); ++t) {
                
                AudioTimeAxisView* atv;
-               Playlist* pl;
-               AudioPlaylist* apl;
+               boost::shared_ptr<Playlist> pl;
+               boost::shared_ptr<AudioPlaylist> apl;
 
                if ((atv = dynamic_cast<AudioTimeAxisView*> (*t)) == 0) {
                        continue;
@@ -3175,8 +3137,8 @@ Editor::paste_named_selection (float times)
                if ((pl = atv->playlist()) == 0) {
                        continue;
                }
-
-               if ((apl = dynamic_cast<AudioPlaylist*> (pl)) == 0) {
+               
+               if ((apl = boost::dynamic_pointer_cast<AudioPlaylist> (pl)) == 0) {
                        continue;
                }
 
@@ -3184,8 +3146,8 @@ Editor::paste_named_selection (float times)
                ++tmp;
 
                 XMLNode &before = apl->get_state();
-               apl->paste (**chunk, edit_cursor->current_frame, times);
-               session->add_command(new MementoCommand<AudioPlaylist>(*apl, before, apl->get_state()));
+               apl->paste (*chunk, edit_cursor->current_frame, times);
+               session->add_command(new MementoCommand<AudioPlaylist>(*apl, &before, &apl->get_state()));
 
                if (tmp != ns->playlists.end()) {
                        chunk = tmp;
@@ -3198,7 +3160,7 @@ Editor::paste_named_selection (float times)
 void
 Editor::duplicate_some_regions (RegionSelection& regions, float times)
 {
-       Playlist *playlist; 
+       boost::shared_ptr<Playlist> playlist; 
        RegionSelection sel = regions; // clear (below) will clear the argument list
                
        begin_reversible_command (_("duplicate region"));
@@ -3207,16 +3169,16 @@ Editor::duplicate_some_regions (RegionSelection& regions, float times)
 
        for (RegionSelection::iterator i = sel.begin(); i != sel.end(); ++i) {
 
-               Region& r ((*i)->region());
+               boost::shared_ptr<Region> r ((*i)->region());
 
                TimeAxisView& tv = (*i)->get_time_axis_view();
                AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (&tv);
                sigc::connection c = atv->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
                
-               playlist = (*i)->region().playlist();
+               playlist = (*i)->region()->playlist();
                 XMLNode &before = playlist->get_state();
-               playlist->duplicate (r, r.last_frame(), times);
-               session->add_command(new MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
+               playlist->duplicate (r, r->last_frame(), times);
+               session->add_command(new MementoCommand<Playlist>(*playlist, &before, &playlist->get_state()));
 
                c.disconnect ();
 
@@ -3236,9 +3198,9 @@ Editor::duplicate_selection (float times)
                return;
        }
 
-       Playlist *playlist; 
-       vector<AudioRegion*> new_regions;
-       vector<AudioRegion*>::iterator ri;
+       boost::shared_ptr<Playlist> playlist; 
+       vector<boost::shared_ptr<AudioRegion> > new_regions;
+       vector<boost::shared_ptr<AudioRegion> >::iterator ri;
                
        create_region_from_selection (new_regions);
 
@@ -3255,9 +3217,9 @@ Editor::duplicate_selection (float times)
                        continue;
                }
                 XMLNode &before = playlist->get_state();
-               playlist->duplicate (**ri, selection->time[clicked_selection].end, times);
+               playlist->duplicate (*ri, selection->time[clicked_selection].end, times);
                 XMLNode &after = playlist->get_state();
-               session->add_command (new MementoCommand<Playlist>(*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist>(*playlist, &before, &after));
 
                ++ri;
                if (ri == new_regions.end()) {
@@ -3302,23 +3264,23 @@ Editor::center_edit_cursor ()
 }
 
 void
-Editor::clear_playlist (Playlist& playlist)
+Editor::clear_playlist (boost::shared_ptr<Playlist> playlist)
 {
        begin_reversible_command (_("clear playlist"));
-        XMLNode &before = playlist.get_state();
-       playlist.clear ();
-        XMLNode &after = playlist.get_state();
-       session->add_command (new MementoCommand<Playlist>(playlist, before, after));
+        XMLNode &before = playlist->get_state();
+       playlist->clear ();
+        XMLNode &after = playlist->get_state();
+       session->add_command (new MementoCommand<Playlist>(*playlist.get(), &before, &after));
        commit_reversible_command ();
 }
 
 void
 Editor::nudge_track (bool use_edit_cursor, bool forwards)
 {
-       Playlist *playlist; 
-       jack_nframes_t distance;
-       jack_nframes_t next_distance;
-       jack_nframes_t start;
+       boost::shared_ptr<Playlist> playlist; 
+       nframes_t distance;
+       nframes_t next_distance;
+       nframes_t start;
 
        if (use_edit_cursor) {
                start = edit_cursor->current_frame;
@@ -3345,7 +3307,7 @@ Editor::nudge_track (bool use_edit_cursor, bool forwards)
                 XMLNode &before = playlist->get_state();
                playlist->nudge_after (start, distance, forwards);
                 XMLNode &after = playlist->get_state();
-               session->add_command (new MementoCommand<Playlist>(*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist>(*playlist, &before, &after));
        }
        
        commit_reversible_command ();                   
@@ -3399,9 +3361,9 @@ Editor::normalize_region ()
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*r);
                if (!arv)
                        continue;
-               XMLNode &before = arv->region().get_state();
-               arv->audio_region().normalize_to (0.0f);
-               session->add_command (new MementoCommand<Region>(arv->region(), before, arv->region().get_state()));
+               XMLNode &before = arv->region()->get_state();
+               arv->audio_region()->normalize_to (0.0f);
+               session->add_command (new MementoCommand<Region>(*(arv->region().get()), &before, &arv->region()->get_state()));
        }
 
        commit_reversible_command ();
@@ -3426,9 +3388,9 @@ Editor::denormalize_region ()
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*r);
                if (!arv)
                        continue;
-               XMLNode &before = arv->region().get_state();
-               arv->audio_region().set_scale_amplitude (1.0f);
-               session->add_command (new MementoCommand<Region>(arv->region(), before, arv->region().get_state()));
+               XMLNode &before = arv->region()->get_state();
+               arv->audio_region()->set_scale_amplitude (1.0f);
+               session->add_command (new MementoCommand<Region>(*(arv->region().get()), &before, &arv->region()->get_state()));
        }
 
        commit_reversible_command ();
@@ -3463,19 +3425,19 @@ Editor::apply_filter (AudioFilter& filter, string command)
                if (!arv)
                        continue;
 
-               Playlist* playlist = arv->region().playlist();
+               boost::shared_ptr<Playlist> playlist = arv->region()->playlist();
 
                RegionSelection::iterator tmp;
                
                tmp = r;
                ++tmp;
 
-               if (arv->audio_region().apply (filter) == 0) {
+               if (arv->audio_region()->apply (filter) == 0) {
 
                         XMLNode &before = playlist->get_state();
-                       playlist->replace_region (arv->region(), *(filter.results.front()), arv->region().position());
+                       playlist->replace_region (arv->region(), filter.results.front(), arv->region()->position());
                         XMLNode &after = playlist->get_state();
-                       session->add_command(new MementoCommand<Playlist>(*playlist, before, after));
+                       session->add_command(new MementoCommand<Playlist>(*playlist, &before, &after));
                } else {
                        goto out;
                }
@@ -3494,7 +3456,8 @@ void
 Editor::region_selection_op (void (Region::*pmf)(void))
 {
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-               ((*i)->region().*pmf)();
+               Region* region = (*i)->region().get();
+               (region->*pmf)();
        }
 }
 
@@ -3503,7 +3466,8 @@ void
 Editor::region_selection_op (void (Region::*pmf)(void*), void *arg)
 {
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-               ((*i)->region().*pmf)(arg);
+               Region* region = (*i)->region().get();
+               (region->*pmf)(arg);
        }
 }
 
@@ -3511,7 +3475,8 @@ void
 Editor::region_selection_op (void (Region::*pmf)(bool), bool yn)
 {
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-               ((*i)->region().*pmf)(yn);
+               Region* region = (*i)->region().get();
+               (region->*pmf)(yn);
        }
 }
 
@@ -3526,7 +3491,7 @@ Editor::external_edit_region ()
 }
 
 void
-Editor::brush (jack_nframes_t pos)
+Editor::brush (nframes_t pos)
 {
        RegionSelection sel;
        snap_to (pos);
@@ -3546,13 +3511,40 @@ Editor::brush (jack_nframes_t pos)
        }
 }
 
+void
+Editor::reset_region_gain_envelopes ()
+{
+       if (!session || selection->regions.empty()) {
+               return;
+       }
+
+       session->begin_reversible_command (_("reset region gain"));
+
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               if (arv) {
+                       AutomationList& alist (arv->audio_region()->envelope());
+                       XMLNode& before (alist.get_state());
+
+                       arv->audio_region()->set_default_envelope ();
+                       session->add_command (new MementoCommand<AutomationList>(arv->audio_region()->envelope(), &before, &alist.get_state()));
+               }
+       }
+
+       session->commit_reversible_command ();
+}
+
 void
 Editor::toggle_gain_envelope_visibility ()
 {
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
-               if (arv)
-                       arv->set_envelope_visible (!arv->envelope_visible());
+               if (arv) {
+                       bool x = region_envelope_visible_item->get_active();
+                       if (x != arv->envelope_visible()) {
+                               arv->set_envelope_visible (x);
+                       }
+               }
        }
 }
 
@@ -3561,7 +3553,53 @@ Editor::toggle_gain_envelope_active ()
 {
        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
-               if (arv)
-                       arv->audio_region().set_envelope_active (true);
+               if (arv) {
+                       bool x = region_envelope_active_item->get_active();
+                       if (x != arv->audio_region()->envelope_active()) {
+                               arv->audio_region()->set_envelope_active (x);
+                       }
+               }
+       }
+}
+
+void
+Editor::toggle_region_lock ()
+{
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               if (arv) {
+                       bool x = region_lock_item->get_active();
+                       if (x != arv->audio_region()->locked()) {
+                               arv->audio_region()->set_locked (x);
+                       }
+               }
+       }
+}
+
+void
+Editor::toggle_region_mute ()
+{
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               if (arv) {
+                       bool x = region_mute_item->get_active();
+                       if (x != arv->audio_region()->muted()) {
+                               arv->audio_region()->set_muted (x);
+                       }
+               }
+       }
+}
+
+void
+Editor::toggle_region_opaque ()
+{
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               if (arv) {
+                       bool x = region_opaque_item->get_active();
+                       if (x != arv->audio_region()->opaque()) {
+                               arv->audio_region()->set_opaque (x);
+                       }
+               }
        }
 }