Fix for SMPTE clock text entry
[ardour.git] / gtk2_ardour / editor_ops.cc
index 579b2403c649194e130beef9195edc391d881ee9..ddcf02911ab4a0215e44a33bfdf6e1d79c8167d7 100644 (file)
@@ -28,6 +28,7 @@
 #include <pbd/error.h>
 #include <pbd/basename.h>
 #include <pbd/pthread_utils.h>
+#include <pbd/memento_command.h>
 
 #include <gtkmm2ext/utils.h>
 #include <gtkmm2ext/choice.h>
@@ -43,6 +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"
 #include "audio_time_axis.h"
 #include "automation_time_axis.h"
 #include "streamview.h"
-#include "regionview.h"
+#include "audio_region_view.h"
 #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"
@@ -89,89 +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;
@@ -184,34 +104,35 @@ Editor::split_region ()
 }
 
 void
-Editor::split_region_at (jack_nframes_t where)
+Editor::split_region_at (nframes_t where)
 {
-       split_regions_at (where, selection->audio_regions);
+       split_regions_at (where, selection->regions);
 }
 
 void
-Editor::split_regions_at (jack_nframes_t where, AudioRegionSelection& regions)
+Editor::split_regions_at (nframes_t where, RegionSelection& regions)
 {
        begin_reversible_command (_("split"));
 
        snap_to (where);
-       for (AudioRegionSelection::iterator a = regions.begin(); a != regions.end(); ) {
+       for (RegionSelection::iterator a = regions.begin(); a != regions.end(); ) {
 
-               AudioRegionSelection::iterator tmp;
+               RegionSelection::iterator tmp;
                
                tmp = a;
                ++tmp;
 
-               Playlist* pl = (*a)->region.playlist();
+               boost::shared_ptr<Playlist> pl = (*a)->region()->playlist();
 
-               _new_regionviews_show_envelope = (*a)->envelope_visible();
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*a);
+               if (arv)
+                       _new_regionviews_show_envelope = arv->envelope_visible();
                
                if (pl) {
-                        XMLNode &before, &after;
-                        before = pl->get_state();
-                       pl->split_region ((*a)->region, where);
-                        after = pl->get_state();
-                        session->add_command(MementoCommand<Playlist>(*pl, before, after));
+                        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));
                }
 
                a = tmp;
@@ -228,22 +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(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->audio_regions.size();
+       uint32_t selected = selection->regions.size();
 
-       if (!session || clicked_regionview == 0 && selected == 0) {
+       if (!session || !selected) {
                return;
        }
 
@@ -270,59 +191,54 @@ Do you really want to destroy %1 ?"),
                return;
        }
 
-       if (selected > 0) {
-               list<Region*> r;
+       if (selected) {
+               list<boost::shared_ptr<Region> > r;
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-                       r.push_back (&(*i)->region);
+               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                       r.push_back ((*i)->region());
                }
 
                session->destroy_regions (r);
-
-       } else if (clicked_regionview) {
-               session->destroy_region (&clicked_regionview->region);
        } 
 }
 
-AudioRegion *
+boost::shared_ptr<Region>
 Editor::select_region_for_operation (int dir, TimeAxisView **tv)
 {
-       AudioRegionView* rv;
-       AudioRegion *region;
-       jack_nframes_t start = 0;
+       RegionView* rv;
+       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->audio_regions.empty()) {
-                       return 0;
+               if (selection->regions.empty()) {
+                       return region;
                }
 
        } 
 
-       region = 0;
-
-       if (!selection->audio_regions.empty()) {
+       if (!selection->regions.empty()) {
 
-               rv = *(selection->audio_regions.begin());
+               rv = *(selection->regions.begin());
                (*tv) = &rv->get_time_axis_view();
-               region = &rv->region;
+               region = rv->region();
 
        } else if (!selection->tracks.empty()) {
 
                (*tv) = selection->tracks.front();
 
-               AudioTimeAxisView* atv;
+               RouteTimeAxisView* rtv;
 
-               if ((atv = dynamic_cast<AudioTimeAxisView*> (*tv)) != 0) {
-                       Playlist *pl;
+               if ((rtv = dynamic_cast<RouteTimeAxisView*> (*tv)) != 0) {
+                       boost::shared_ptr<Playlist> pl;
                        
-                       if ((pl = atv->playlist()) == 0) {
-                               return 0;
+                       if ((pl = rtv->playlist()) == 0) {
+                               return region;
                        }
                        
-                       region = dynamic_cast<AudioRegion*> (pl->top_region_at (start));
+                       region = pl->top_region_at (start);
                }
        } 
        
@@ -333,8 +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;
@@ -361,8 +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;
@@ -389,28 +305,28 @@ 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;
        
-       if (!selection->audio_regions.empty()) {
+       if (!selection->regions.empty()) {
 
                begin_reversible_command (_("nudge forward"));
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-                       AudioRegion& r ((*i)->region);
+               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                       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 (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 ();
@@ -424,33 +340,33 @@ 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;
        
-       if (!selection->audio_regions.empty()) {
+       if (!selection->regions.empty()) {
 
                begin_reversible_command (_("nudge forward"));
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-                       AudioRegion& r ((*i)->region);
+               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                       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(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 ();
@@ -470,24 +386,23 @@ Editor::nudge_backward (bool next)
 void
 Editor::nudge_forward_capture_offset ()
 {
-       jack_nframes_t distance;
+       nframes_t distance;
 
        if (!session) return;
        
-       if (!selection->audio_regions.empty()) {
+       if (!selection->regions.empty()) {
 
                begin_reversible_command (_("nudge forward"));
 
                distance = session->worst_output_latency();
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-                       AudioRegion& r ((*i)->region);
+               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                       boost::shared_ptr<Region> r ((*i)->region());
                        
-                        XMLNode &before, &after;
-                       before = r.playlist()->get_state();
-                       r.set_position (r.position() + distance, this);
-                       after = r.playlist()->get_state();
-                       session->add_command(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 ();
@@ -498,28 +413,28 @@ Editor::nudge_forward_capture_offset ()
 void
 Editor::nudge_backward_capture_offset ()
 {
-       jack_nframes_t distance;
+       nframes_t distance;
 
        if (!session) return;
        
-       if (!selection->audio_regions.empty()) {
+       if (!selection->regions.empty()) {
 
                begin_reversible_command (_("nudge forward"));
 
                distance = session->worst_output_latency();
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-                       AudioRegion& r ((*i)->region);
+               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                       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(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 ();
@@ -544,9 +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 ();
@@ -600,7 +515,7 @@ Editor::build_region_boundary_cache ()
                        }
                }
 
-               jack_nframes_t rpos;
+               nframes_t rpos;
                
                switch (snap_type) {
                case SnapToRegionStart:
@@ -642,23 +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)
@@ -707,8 +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;
@@ -787,11 +702,11 @@ 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->audio_regions.empty()) {
-                       pos = selection->audio_regions.start();
+               if (!selection->regions.empty()) {
+                       pos = selection->regions.start();
                }
                break;
 
@@ -815,12 +730,12 @@ 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:
-               if (!selection->audio_regions.empty()) {
-                       pos = selection->audio_regions.end_frame();
+               if (!selection->regions.empty()) {
+                       pos = selection->regions.end_frame();
                }
                break;
 
@@ -844,8 +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;
 
@@ -853,15 +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;
@@ -878,8 +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;
 
@@ -887,9 +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);
                }
        }
 
@@ -918,8 +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;
 
@@ -927,15 +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;
@@ -947,8 +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;
 
@@ -956,9 +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);
                }
        }
 
@@ -971,16 +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);
@@ -989,19 +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);
                }
        }
 
@@ -1017,24 +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;
        }
@@ -1111,9 +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);
@@ -1124,17 +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:
@@ -1170,7 +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;
@@ -1198,8 +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");
 }
@@ -1215,7 +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;
 
@@ -1223,7 +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;
@@ -1233,9 +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;
 
@@ -1248,26 +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;
 
@@ -1290,49 +1205,49 @@ 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");
+       Location *location = new Location (start, end, "selection", 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(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();
+       nframes_t where = session->audible_frame();
        
        Location *location = new Location (where, where, "mark", 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(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_audio_region ()
 {
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
-       AudioRegionView* rv = *(selection->audio_regions.begin());
-       Region& region = rv->region;
+       RegionView* rv = *(selection->regions.begin());
+       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(MementoCommand<Locations>(*(session->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
 }
 
@@ -1357,6 +1272,9 @@ Editor::select_all_in_track (Selection::Operation op)
        case Selection::Extend:
                /* not defined yet */
                break;
+       case Selection::Add:
+               selection->add (touched);
+               break;
        }
 }
 
@@ -1373,6 +1291,7 @@ Editor::select_all (Selection::Operation op)
        }
        begin_reversible_command (_("select all"));
        switch (op) {
+       case Selection::Add:
        case Selection::Toggle:
                selection->add (touched);
                break;
@@ -1415,7 +1334,7 @@ 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;
        
@@ -1430,6 +1349,7 @@ 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);
@@ -1453,15 +1373,15 @@ Editor::select_all_within (jack_nframes_t start, jack_nframes_t end, double top,
 void
 Editor::set_selection_from_audio_region ()
 {
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
-       AudioRegionView* rv = *(selection->audio_regions.begin());
-       Region& region = rv->region;
+       RegionView* rv = *(selection->regions.begin());
+       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);
@@ -1509,8 +1429,8 @@ 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;
@@ -1576,8 +1496,8 @@ 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) {
@@ -1607,8 +1527,8 @@ 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;
 
@@ -1726,7 +1646,7 @@ Editor::jump_backward_to_mark ()
 void
 Editor::set_mark ()
 {
-       jack_nframes_t pos;
+       nframes_t pos;
        float prefix;
        bool was_floating;
 
@@ -1734,9 +1654,9 @@ Editor::set_mark ()
                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);
                }
        }
 
@@ -1751,7 +1671,7 @@ Editor::clear_markers ()
                 XMLNode &before = session->locations()->get_state();
                session->locations()->clear_markers ();
                 XMLNode &after = session->locations()->get_state();
-               session->add_command(MementoCommand<Locations>(*(session->locations()), before, after));
+               session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
                session->commit_reversible_command ();
        }
 }
@@ -1772,7 +1692,7 @@ Editor::clear_ranges ()
                if (punchloc) session->locations()->add (punchloc);
                
                 XMLNode &after = session->locations()->get_state();
-               session->add_command(MementoCommand<Locations>(*(session->locations()), before, after));
+               session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
                session->commit_reversible_command ();
        }
 }
@@ -1784,7 +1704,7 @@ Editor::clear_locations ()
         XMLNode &before = session->locations()->get_state();
        session->locations()->clear ();
         XMLNode &after = session->locations()->get_state();
-       session->add_command(MementoCommand<Locations>(*(sessions->locations()), before, after));
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        session->commit_reversible_command ();
        session->locations()->clear ();
 }
@@ -1792,14 +1712,14 @@ Editor::clear_locations ()
 /* 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();
@@ -1829,25 +1749,31 @@ 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(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)
 {
-       AudioTimeAxisView *tv = 0;
-       Playlist *playlist;
+       RouteTimeAxisView *tv = 0;
+       boost::shared_ptr<Playlist> playlist;
 
        if (clicked_audio_trackview != 0) {
                tv = clicked_audio_trackview;
        } else if (!selection->tracks.empty()) {
-               if ((tv = dynamic_cast<AudioTimeAxisView*>(selection->tracks.front())) == 0) {
+               if ((tv = dynamic_cast<RouteTimeAxisView*>(selection->tracks.front())) == 0) {
                        return;
                }
        } else {
@@ -1864,16 +1790,23 @@ 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(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 */
 
@@ -1899,9 +1832,9 @@ 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 */
@@ -1915,8 +1848,8 @@ 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);
@@ -1929,6 +1862,12 @@ 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 ()
 {
@@ -1942,27 +1881,27 @@ Editor::play_selection ()
 void
 Editor::play_selected_region ()
 {
-       if (!selection->audio_regions.empty()) {
-               AudioRegionView *rv = *(selection->audio_regions.begin());
+       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());   
        }
 }
 
 void
 Editor::loop_selected_region ()
 {
-       if (!selection->audio_regions.empty()) {
-               AudioRegionView *rv = *(selection->audio_regions.begin());
+       if (!selection->regions.empty()) {
+               RegionView *rv = *(selection->regions.begin());
                Location* tll;
 
                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);
                }
@@ -1992,55 +1931,33 @@ 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->audio_regions.empty()) {
-               bool yn = ! (*selection->audio_regions.begin())->region.muted();
-               selection->foreach_audio_region (&AudioRegion::set_muted, yn);
-       }
-}
-
-void
-Editor::toggle_region_opaque ()
-{
-       if (clicked_regionview) {
-               clicked_regionview->region.set_opaque (!clicked_regionview->region.opaque());
-       } else if (!selection->audio_regions.empty()) {
-               bool yn = ! (*selection->audio_regions.begin())->region.opaque();
-               selection->foreach_audio_region (&Region::set_opaque, yn);
-       }
-}
-
 void
 Editor::raise_region ()
 {
-       selection->foreach_audio_region (&Region::raise);
+       selection->foreach_region (&Region::raise);
 }
 
 void
 Editor::raise_region_to_top ()
 {
-       selection->foreach_audio_region (&Region::raise_to_top);
+       selection->foreach_region (&Region::raise_to_top);
 }
 
 void
 Editor::lower_region ()
 {
-       selection->foreach_audio_region (&Region::lower);
+       selection->foreach_region (&Region::lower);
 }
 
 void
 Editor::lower_region_to_bottom ()
 {
-       selection->foreach_audio_region (&Region::lower_to_bottom);
+       selection->foreach_region (&Region::lower_to_bottom);
 }
 
 void
@@ -2061,7 +1978,7 @@ Editor::rename_region ()
        Button ok_button (_("OK"));
        Button cancel_button (_("Cancel"));
 
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
@@ -2092,7 +2009,7 @@ Editor::rename_region ()
        Main::run ();
 
        if (region_renamed) {
-               (*selection->audio_regions.begin())->region.set_name (entry.get_text());
+               (*selection->regions.begin())->region()->set_name (entry.get_text());
                redisplay_regions ();
        }
 }
@@ -2106,7 +2023,7 @@ Editor::rename_region_finished (bool status)
 }
 
 void
-Editor::audition_playlist_region_via_route (AudioRegion& region, Route& route)
+Editor::audition_playlist_region_via_route (boost::shared_ptr<Region> region, Route& route)
 {
        if (session->is_auditioning()) {
                session->cancel_audition ();
@@ -2119,7 +2036,7 @@ Editor::audition_playlist_region_via_route (AudioRegion& 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 ? */
 }
@@ -2127,14 +2044,14 @@ Editor::audition_playlist_region_via_route (AudioRegion& region, Route& route)
 void
 Editor::audition_selected_region ()
 {
-       if (!selection->audio_regions.empty()) {
-               AudioRegionView* rv = *(selection->audio_regions.begin());
-               session->audition_region (rv->region);
+       if (!selection->regions.empty()) {
+               RegionView* rv = *(selection->regions.begin());
+               session->audition_region (rv->region());
        }
 }
 
 void
-Editor::audition_playlist_region_standalone (AudioRegion& region)
+Editor::audition_playlist_region_standalone (boost::shared_ptr<Region> region)
 {
        session->audition_region (region);
 }
@@ -2178,19 +2095,17 @@ 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) {
+               boost::shared_ptr<AudioRegion> current;
+               boost::shared_ptr<Region> current_r;
+               boost::shared_ptr<Playlist> pl;
 
-               AudioRegion *region;
-               AudioRegion *current;
-               Region* current_r;
-               Playlist *pl;
-
-               jack_nframes_t internal_start;
+               nframes_t internal_start;
                string new_name;
 
                if ((pl = (*i)->playlist()) == 0) {
@@ -2201,30 +2116,32 @@ Editor::region_from_selection ()
                        continue;
                }
 
-               if ((current = dynamic_cast<AudioRegion*> (current_r)) != 0) {
+               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) {
@@ -2235,14 +2152,14 @@ 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)));
        }
 }
 
@@ -2251,11 +2168,13 @@ Editor::split_multichannel_region ()
 {
        vector<AudioRegion*> v;
 
-       if (!clicked_regionview || clicked_regionview->region.n_channels() < 2) {
+       AudioRegionView* clicked_arv = dynamic_cast<AudioRegionView*>(clicked_regionview);
+       
+       if (!clicked_arv || clicked_arv->audio_region()->n_channels() < 2) {
                return;
        }
 
-       clicked_regionview->region.separate_by_channel (*session, v);
+       clicked_arv->audio_region()->separate_by_channel (*session, v);
 
        /* nothing else to do, really */
 }
@@ -2276,7 +2195,7 @@ 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) {
 
@@ -2291,20 +2210,20 @@ Editor::separate_region_from_selection ()
                                                begin_reversible_command (_("separate"));
                                                doing_undo = true;
                                        }
-                                        XMLNode &before, &after;
+                                        XMLNode *before;
                                        if (doing_undo) 
-                                            before = playlist->get_state();
+                                            before = &(playlist->get_state());
                        
                                        /* XXX need to consider musical time selections here at some point */
 
                                        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(MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
+                                            session->add_command(new MementoCommand<Playlist>(*playlist, before, &playlist->get_state()));
                                }
                        }
                }
@@ -2322,7 +2241,7 @@ 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 
@@ -2339,13 +2258,13 @@ Editor::separate_regions_using_location (Location& loc)
                        if (atv->is_audio_track()) {
                                        
                                if ((playlist = atv->playlist()) != 0) {
-                                        XMLNode &before, &after;
+                                        XMLNode *before;
                                        if (!doing_undo) {
                                                begin_reversible_command (_("separate"));
                                                doing_undo = true;
                                        }
                                        if (doing_undo) 
-                                            before = playlist->get_state();
+                                            before = &(playlist->get_state());
                                             
                        
                                        /* XXX need to consider musical time selections here at some point */
@@ -2353,9 +2272,9 @@ 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(MementoCommand<Playlist>(*playlist, before, playlist->get_state()));
+                                            session->add_command(new MementoCommand<Playlist>(*playlist, before, &playlist->get_state()));
                                }
                        }
                }
@@ -2371,8 +2290,8 @@ 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) {
 
@@ -2402,15 +2321,15 @@ 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();
 
@@ -2429,7 +2348,7 @@ Editor::crop_region_to_selection ()
                         XMLNode &before = (*i)->get_state();
                        region->trim_to (start, cnt, this);
                         XMLNode &after = (*i)->get_state();
-                       session->add_command (MementoCommand<Playlist>(*(*i), before, after));
+                       session->add_command (new MementoCommand<Playlist>(*(*i), &before, &after));
                }
 
                commit_reversible_command ();
@@ -2439,9 +2358,9 @@ Editor::crop_region_to_selection ()
 void
 Editor::region_fill_track ()
 {
-       jack_nframes_t end;
+       nframes_t end;
 
-       if (!session || selection->audio_regions.empty()) {
+       if (!session || selection->regions.empty()) {
                return;
        }
 
@@ -2449,24 +2368,30 @@ Editor::region_fill_track ()
 
        begin_reversible_command (_("region fill"));
 
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+
+               boost::shared_ptr<Region> region ((*i)->region());
+               
+               // FIXME
+               boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(region);
+               if (!ar)
+                       continue;
 
-               AudioRegion& region ((*i)->region);
-               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 (region)), region.last_frame(), times);
-               session->add_command (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 ();
@@ -2483,7 +2408,6 @@ Editor::region_fill_selection ()
                return;
        }
 
-       Region *region;
 
        Glib::RefPtr<TreeSelection> selected = region_list_display.get_selection();
 
@@ -2492,18 +2416,18 @@ 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"));
@@ -2515,26 +2439,26 @@ Editor::region_fill_selection ()
                }               
                
                 XMLNode &before = playlist->get_state();
-               playlist->add_region (*(createRegion (*region)), start, times);
-               session->add_command (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(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 ();
 }
 
@@ -2545,17 +2469,17 @@ 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(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 ();
 }
 
@@ -2563,12 +2487,12 @@ 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(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 ();
        }
 }
@@ -2576,15 +2500,15 @@ Editor::remove_region_sync ()
 void
 Editor::naturalize ()
 {
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
        begin_reversible_command (_("naturalize"));
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_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 (MementoCommand<AudioRegion>((*i)->region, before, after));
+       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().get()), &before, &after));
        }
        commit_reversible_command ();
 }
@@ -2603,36 +2527,36 @@ 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->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
-       jack_nframes_t distance;
-       jack_nframes_t pos = 0;
+       nframes_t distance;
+       nframes_t pos = 0;
        int dir;
 
-       list<AudioRegionView*> sorted;
-       selection->audio_regions.by_position (sorted);
-       Region& r ((*sorted.begin())->region);
+       list<RegionView*> sorted;
+       selection->regions.by_position (sorted);
+       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;  
        }
 
@@ -2646,20 +2570,20 @@ Editor::align_selection_relative (RegionPoint point, jack_nframes_t position)
 
        begin_reversible_command (_("align selection (relative)"));
 
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
+       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(MementoCommand<Playlist>(*(region.playlist()), before, after));
+                XMLNode &after = region->playlist()->get_state();
+               session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
 
        }
 
@@ -2667,23 +2591,23 @@ 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->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
        begin_reversible_command (_("align selection"));
 
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               align_region_internal ((*i)->region, point, position);
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               align_region_internal ((*i)->region(), point, position);
        }
 
        commit_reversible_command ();
 }
 
 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);
@@ -2691,29 +2615,28 @@ 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, &after;
-       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;
        }
 
-       after = region.playlist()->get_state();
-       session->add_command(MementoCommand<Playlist>(*(region.playlist()), before, after));
+       XMLNode &after = region->playlist()->get_state();
+       session->add_command(new MementoCommand<Playlist>(*(region->playlist()), &before, &after));
 }      
 
 void
@@ -2723,7 +2646,7 @@ 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;
@@ -2735,10 +2658,10 @@ 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(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 ();
 }
 
@@ -2749,7 +2672,7 @@ 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;
@@ -2761,10 +2684,10 @@ 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(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 ();
 }
 
@@ -2850,9 +2773,9 @@ 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"));
 
@@ -2864,7 +2787,7 @@ Editor::bounce_range_selection ()
                        continue;
                }
                
-               Playlist* playlist;
+               boost::shared_ptr<Playlist> playlist;
                
                if ((playlist = atv->playlist()) == 0) {
                        return;
@@ -2879,7 +2802,7 @@ 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 (MementoCommand<Playlist> (*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist> (*playlist, &before, &after));
        }
        
        commit_reversible_command ();
@@ -2922,16 +2845,16 @@ Editor::cut_copy (CutCopyOp op)
 
        switch (current_mouse_mode()) {
        case MouseObject: 
-               if (!selection->audio_regions.empty() || !selection->points.empty()) {
+               if (!selection->regions.empty() || !selection->points.empty()) {
 
                        begin_reversible_command (opname + _(" objects"));
 
-                       if (!selection->audio_regions.empty()) {
+                       if (!selection->regions.empty()) {
                                
                                cut_copy_regions (op);
                                
                                if (op == Cut) {
-                                       selection->clear_audio_regions ();
+                                       selection->clear_regions ();
                                }
                        }
 
@@ -2979,35 +2902,53 @@ 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;
 
-       for (AudioRegionSelection::iterator x = selection->audio_regions.begin(); x != selection->audio_regions.end(); ++x) {
-               first_position = min ((*x)->region.position(), first_position);
+       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);
 
                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_undo (pl->get_memento());
                                }
                        }
                }
        }
 
-       for (AudioRegionSelection::iterator x = selection->audio_regions.begin(); x != selection->audio_regions.end(); ) {
+       for (RegionSelection::iterator x = selection->regions.begin(); x != selection->regions.end(); ) {
 
-               AudioPlaylist *pl = dynamic_cast<AudioPlaylist*>((*x)->region.playlist());
-               AudioPlaylist* npl;
-               AudioRegionSelection::iterator tmp;
+               boost::shared_ptr<AudioPlaylist> pl = boost::dynamic_pointer_cast<AudioPlaylist>((*x)->region()->playlist());
+               boost::shared_ptr<AudioPlaylist> npl;
+               RegionSelection::iterator tmp;
                
                tmp = x;
                ++tmp;
@@ -3017,25 +2958,31 @@ 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 {
                                npl = pi->second;
                        }
 
+                       // FIXME
+                       boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>((*x)->region());
                        switch (op) {
                        case Cut:
-                               npl->add_region (*(new AudioRegion ((*x)->region)), (*x)->region.position() - first_position);
-                               pl->remove_region (&((*x)->region));
+                               if (!ar) break;
+
+                               npl->add_region (RegionFactory::create (ar), (*x)->region()->position() - first_position);
+                               pl->remove_region (((*x)->region()));
                                break;
 
                        case Copy:
-                               npl->add_region (*(new AudioRegion ((*x)->region)), (*x)->region.position() - first_position);
+                               if (!ar) break;
+
+                               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;
                        }
                }
@@ -3043,7 +2990,7 @@ 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);
@@ -3053,9 +3000,9 @@ 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_redo_no_execute ((*pl)->get_memento());
+       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()));
        }
 }
 
@@ -3089,13 +3036,13 @@ 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;
 
@@ -3140,8 +3087,8 @@ 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();
                
@@ -3150,8 +3097,8 @@ 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;
@@ -3160,8 +3107,8 @@ 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;
                }
 
@@ -3169,8 +3116,8 @@ Editor::paste_named_selection (float times)
                ++tmp;
 
                 XMLNode &before = apl->get_state();
-               apl->paste (**chunk, edit_cursor->current_frame, times);
-               session->add_command(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;
@@ -3181,27 +3128,27 @@ Editor::paste_named_selection (float times)
 }
 
 void
-Editor::duplicate_some_regions (AudioRegionSelection& regions, float times)
+Editor::duplicate_some_regions (RegionSelection& regions, float times)
 {
-       Playlist *playlist; 
-       AudioRegionSelection sel = regions; // clear (below) will clear the argument list
+       boost::shared_ptr<Playlist> playlist; 
+       RegionSelection sel = regions; // clear (below) will clear the argument list
                
        begin_reversible_command (_("duplicate region"));
 
-       selection->clear_audio_regions ();
+       selection->clear_regions ();
 
-       for (AudioRegionSelection::iterator i = sel.begin(); i != sel.end(); ++i) {
+       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->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+               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(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 ();
 
@@ -3221,9 +3168,9 @@ 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);
 
@@ -3240,9 +3187,9 @@ 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 (MementoCommand<Playlist>(*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist>(*playlist, &before, &after));
 
                ++ri;
                if (ri == new_regions.end()) {
@@ -3287,23 +3234,23 @@ 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 (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;
@@ -3330,7 +3277,7 @@ 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 (MementoCommand<Playlist>(*playlist, before, after));
+               session->add_command (new MementoCommand<Playlist>(*playlist, &before, &after));
        }
        
        commit_reversible_command ();                   
@@ -3371,7 +3318,7 @@ Editor::normalize_region ()
                return;
        }
 
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
@@ -3380,11 +3327,13 @@ Editor::normalize_region ()
        track_canvas.get_window()->set_cursor (*wait_cursor);
        gdk_flush ();
 
-       for (AudioRegionSelection::iterator r = selection->audio_regions.begin(); r != selection->audio_regions.end(); ++r) {
-                XMLNode &before = (*r)->region.get_state();
-               (*r)->region.normalize_to (0.0f);
-                XMLNode &after = (*r)->region.get_state();
-               session->add_command (MementoCommand<AudioRegion>((*r)->region, before, after));
+       for (RegionSelection::iterator r = selection->regions.begin(); r != selection->regions.end(); ++r) {
+               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().get()), &before, &arv->region()->get_state()));
        }
 
        commit_reversible_command ();
@@ -3399,17 +3348,19 @@ Editor::denormalize_region ()
                return;
        }
 
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
        begin_reversible_command ("denormalize");
 
-       for (AudioRegionSelection::iterator r = selection->audio_regions.begin(); r != selection->audio_regions.end(); ++r) {
-                XMLNode &before = (*r)->region.get_state();
-               (*r)->region.set_scale_amplitude (1.0f);
-                XMLNode &after = (*r)->region.get_state();
-               session->add_command (MementoCommand<AudioRegion>((*r)->region, before, after));
+       for (RegionSelection::iterator r = selection->regions.begin(); r != selection->regions.end(); ++r) {
+               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().get()), &before, &arv->region()->get_state()));
        }
 
        commit_reversible_command ();
@@ -3430,7 +3381,7 @@ Editor::reverse_region ()
 void
 Editor::apply_filter (AudioFilter& filter, string command)
 {
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                return;
        }
 
@@ -3439,22 +3390,24 @@ Editor::apply_filter (AudioFilter& filter, string command)
        track_canvas.get_window()->set_cursor (*wait_cursor);
        gdk_flush ();
 
-       for (AudioRegionSelection::iterator r = selection->audio_regions.begin(); r != selection->audio_regions.end(); ) {
+       for (RegionSelection::iterator r = selection->regions.begin(); r != selection->regions.end(); ) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*r);
+               if (!arv)
+                       continue;
 
-               AudioRegion& region ((*r)->region);
-               Playlist* playlist = region.playlist();
+               boost::shared_ptr<Playlist> playlist = arv->region()->playlist();
 
-               AudioRegionSelection::iterator tmp;
+               RegionSelection::iterator tmp;
                
                tmp = r;
                ++tmp;
 
-               if (region.apply (filter) == 0) {
+               if (arv->audio_region()->apply (filter) == 0) {
 
                         XMLNode &before = playlist->get_state();
-                       playlist->replace_region (region, *(filter.results.front()), region.position());
+                       playlist->replace_region (arv->region(), filter.results.front(), arv->region()->position());
                         XMLNode &after = playlist->get_state();
-                       session->add_command(MementoCommand<Playlist>(*playlist, before, after));
+                       session->add_command(new MementoCommand<Playlist>(*playlist, &before, &after));
                } else {
                        goto out;
                }
@@ -3463,7 +3416,7 @@ Editor::apply_filter (AudioFilter& filter, string command)
        }
 
        commit_reversible_command ();
-       selection->audio_regions.clear ();
+       selection->regions.clear ();
 
   out:
        track_canvas.get_window()->set_cursor (*current_canvas_cursor);
@@ -3472,8 +3425,9 @@ Editor::apply_filter (AudioFilter& filter, string command)
 void
 Editor::region_selection_op (void (Region::*pmf)(void))
 {
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               ((*i)->region.*pmf)();
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               Region* region = (*i)->region().get();
+               (region->*pmf)();
        }
 }
 
@@ -3481,16 +3435,18 @@ Editor::region_selection_op (void (Region::*pmf)(void))
 void
 Editor::region_selection_op (void (Region::*pmf)(void*), void *arg)
 {
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               ((*i)->region.*pmf)(arg);
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               Region* region = (*i)->region().get();
+               (region->*pmf)(arg);
        }
 }
 
 void
 Editor::region_selection_op (void (Region::*pmf)(bool), bool yn)
 {
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               ((*i)->region.*pmf)(yn);
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               Region* region = (*i)->region().get();
+               (region->*pmf)(yn);
        }
 }
 
@@ -3505,41 +3461,115 @@ Editor::external_edit_region ()
 }
 
 void
-Editor::brush (jack_nframes_t pos)
+Editor::brush (nframes_t pos)
 {
-       AudioRegionSelection sel;
+       RegionSelection sel;
        snap_to (pos);
 
-       if (selection->audio_regions.empty()) {
+       if (selection->regions.empty()) {
                /* XXX get selection from region list */
        } else { 
-               sel = selection->audio_regions;
+               sel = selection->regions;
        }
 
        if (sel.empty()) {
                return;
        }
 
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
                mouse_brush_insert_region ((*i), 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 (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               (*i)->set_envelope_visible (!(*i)->envelope_visible());
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               if (arv) {
+                       bool x = region_envelope_visible_item->get_active();
+                       if (x != arv->envelope_visible()) {
+                               arv->set_envelope_visible (x);
+                       }
+               }
        }
 }
 
 void
 Editor::toggle_gain_envelope_active ()
 {
-       for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
-               AudioRegion* ar = dynamic_cast<AudioRegion*>(&(*i)->region);
-               if (ar) {
-                       ar->set_envelope_active (true);
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+               AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+               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);
+                       }
                }
        }
 }