Merge branch 'uk-english'
[ardour.git] / gtk2_ardour / editor_ops.cc
index 68240871362cb21cf65749d4d3ea838d3eeb8757..116bc4571d28e2d3bd5ec78283c9a6f118cd6c50 100644 (file)
@@ -24,6 +24,7 @@
 #include <cstdlib>
 #include <cmath>
 #include <string>
+#include <limits>
 #include <map>
 #include <set>
 
@@ -49,6 +50,7 @@
 #include "ardour/playlist_factory.h"
 #include "ardour/profile.h"
 #include "ardour/quantize.h"
+#include "ardour/legatize.h"
 #include "ardour/region_factory.h"
 #include "ardour/reverse.h"
 #include "ardour/session.h"
@@ -63,6 +65,7 @@
 #include "audio_region_view.h"
 #include "audio_streamview.h"
 #include "audio_time_axis.h"
+#include "automation_region_view.h"
 #include "automation_time_axis.h"
 #include "control_point.h"
 #include "debug.h"
 #include "gui_thread.h"
 #include "insert_time_dialog.h"
 #include "interthread_progress_window.h"
+#include "item_counts.h"
 #include "keyboard.h"
 #include "midi_region_view.h"
 #include "mixer_strip.h"
 #include "mouse_cursors.h"
 #include "normalize_dialog.h"
+#include "note.h"
+#include "paste_context.h"
 #include "patch_change_dialog.h"
 #include "quantize_dialog.h"
 #include "region_gain_line.h"
@@ -91,6 +97,7 @@
 #include "strip_silence_dialog.h"
 #include "time_axis_view.h"
 #include "transpose_dialog.h"
+#include "transform_dialog.h"
 
 #include "i18n.h"
 
@@ -115,6 +122,11 @@ Editor::undo (uint32_t n)
        
        if (_session) {
                _session->undo (n);
+               if (_session->undo_depth() == 0) {
+                       undo_action->set_sensitive(false);
+               }
+               redo_action->set_sensitive(true);
+               begin_selection_op_history ();
        }
 }
 
@@ -127,6 +139,11 @@ Editor::redo (uint32_t n)
        
        if (_session) {
                _session->redo (n);
+               if (_session->redo_depth() == 0) {
+                       redo_action->set_sensitive(false);
+               }
+               undo_action->set_sensitive(true);
+               begin_selection_op_history ();
        }
 }
 
@@ -213,14 +230,14 @@ Editor::split_regions_at (framepos_t where, RegionSelection& regions)
                a = tmp;
        }
 
+       latest_regionviews.clear ();
+
        vector<sigc::connection> region_added_connections;
 
        for (list<RouteTimeAxisView*>::iterator i = used_trackviews.begin(); i != used_trackviews.end(); ++i) {
                region_added_connections.push_back ((*i)->view()->RegionViewAdded.connect (sigc::mem_fun(*this, &Editor::collect_new_region_view)));
        }
        
-       latest_regionviews.clear ();
-
        while (used_playlists.size() > 0) {
                list <boost::shared_ptr<Playlist > >::iterator i = used_playlists.begin();
                (*i)->thaw();
@@ -230,22 +247,51 @@ Editor::split_regions_at (framepos_t where, RegionSelection& regions)
        for (vector<sigc::connection>::iterator c = region_added_connections.begin(); c != region_added_connections.end(); ++c) {
                (*c).disconnect ();
        }
-       
-       commit_reversible_command ();
 
        if (frozen){
                EditorThaw(); /* Emit Signal */
        }
 
-       if (ARDOUR::Profile->get_mixbus()) {
-               //IFF we were working on selected regions, try to reinstate the other region selections that existed before the freeze/thaw.
-               _ignore_follow_edits = true;  //a split will change the region selection in mysterious ways;  its not practical or wanted to follow this edit
-               if( working_on_selection ) {
+       if (working_on_selection) {
+               // IFF we were working on selected regions, try to reinstate the other region selections that existed before the freeze/thaw.
+
+               _ignore_follow_edits = true;  // a split will change the region selection in mysterious ways;  it's not practical or wanted to follow this edit
+               RegionSelectionAfterSplit rsas = Config->get_region_selection_after_split();
+               /* There are three classes of regions that we might want selected after
+                  splitting selected regions:
+                   - regions selected before the split operation, and unaffected by it
+                   - newly-created regions before the split
+                   - newly-created regions after the split
+                */
+
+               if (rsas & Existing) {
+                       // region selections that existed before the split.
                        selection->add ( pre_selected_regions );
+               }
+
+               for (RegionSelection::iterator ri = latest_regionviews.begin(); ri != latest_regionviews.end(); ri++) {
+                       if ((*ri)->region()->position() < where) {
+                               // new regions created before the split
+                               if (rsas & NewlyCreatedLeft) {
+                                       selection->add (*ri);
+                               }
+                       } else {
+                               // new regions created after the split
+                               if (rsas & NewlyCreatedRight) {
+                                       selection->add (*ri);
+                               }
+                       }
+               }
+               _ignore_follow_edits = false;
+       } else {
+               _ignore_follow_edits = true;
+               if( working_on_selection ) {
                        selection->add (latest_regionviews);  //these are the new regions created after the split
                }
                _ignore_follow_edits = false;
        }
+
+       commit_reversible_command ();
 }
 
 /** Move one extreme of the current range selection.  If more than one range is selected,
@@ -646,7 +692,7 @@ Editor::build_region_boundary_cache ()
                break;
        default:
                fatal << string_compose (_("build_region_boundary_cache called with snap_type = %1"), _snap_type) << endmsg;
-               /*NOTREACHED*/
+               abort(); /*NOTREACHED*/
                return;
        }
 
@@ -1365,10 +1411,9 @@ Editor::scroll_tracks_up_line ()
 }
 
 bool
-Editor::scroll_down_one_track ()
+Editor::scroll_down_one_track (bool skip_child_views)
 {
-       TrackViewList::reverse_iterator next = track_views.rbegin();
-       std::pair<TimeAxisView*,double> res;
+       TrackViewList::reverse_iterator next = track_views.rend();
        const double top_of_trackviews = vertical_adjustment.get_value();
 
        for (TrackViewList::reverse_iterator t = track_views.rbegin(); t != track_views.rend(); ++t) {
@@ -1376,25 +1421,59 @@ Editor::scroll_down_one_track ()
                        continue;
                }
 
-               next = t;
-               if (next != track_views.rbegin()) {
-                       --next; // moves "next" towards the lower/later tracks since it is a reverse iterator
-               }
-
                /* If this is the upper-most visible trackview, we want to display
-                  the one above it (next)
-               */
-
-               res = (*t)->covers_y_position (top_of_trackviews);
+                * the one above it (next)
+                *
+                * Note that covers_y_position() is recursive and includes child views
+                */
+               std::pair<TimeAxisView*,double> res = (*t)->covers_y_position (top_of_trackviews);
 
                if (res.first) {
+                       if (skip_child_views) {
+                               break;
+                       }
+                       /* automation lane (one level, non-recursive)
+                        *
+                        * - if no automation lane exists -> move to next tack
+                        * - if the first (here: bottom-most) matches -> move to next tack
+                        * - if no y-axis match is found -> the current track is at the top
+                        *     -> move to last (here: top-most) automation lane
+                        */
+                       TimeAxisView::Children kids = (*t)->get_child_list();
+                       TimeAxisView::Children::reverse_iterator nkid = kids.rend();
+
+                       for (TimeAxisView::Children::reverse_iterator ci = kids.rbegin(); ci != kids.rend(); ++ci) {
+                               if ((*ci)->hidden()) {
+                                       continue;
+                               }
+
+                               std::pair<TimeAxisView*,double> dev;
+                               dev = (*ci)->covers_y_position (top_of_trackviews);
+                               if (dev.first) {
+                                       /* some automation lane is currently at the top */
+                                       if (ci == kids.rbegin()) {
+                                               /* first (bottom-most) autmation lane is at the top.
+                                                * -> move to next track
+                                                */
+                                               nkid = kids.rend();
+                                       }
+                                       break;
+                               }
+                               nkid = ci;
+                       }
+
+                       if (nkid != kids.rend()) {
+                               ensure_time_axis_view_is_visible (**nkid, true);
+                               return true;
+                       }
                        break;
                }
+               next = t;
        }
 
        /* move to the track below the first one that covers the */
        
-       if (next != track_views.rbegin()) {
+       if (next != track_views.rend()) {
                ensure_time_axis_view_is_visible (**next, true);
                return true;
        }
@@ -1403,10 +1482,9 @@ Editor::scroll_down_one_track ()
 }      
 
 bool
-Editor::scroll_up_one_track ()
+Editor::scroll_up_one_track (bool skip_child_views)
 {
        TrackViewList::iterator prev = track_views.end();
-       std::pair<TimeAxisView*,double> res;
        double top_of_trackviews = vertical_adjustment.get_value ();
        
        for (TrackViewList::iterator t = track_views.begin(); t != track_views.end(); ++t) {
@@ -1415,10 +1493,55 @@ Editor::scroll_up_one_track ()
                        continue;
                }
 
-               /* find the trackview at the top of the trackview group */
-               res = (*t)->covers_y_position (top_of_trackviews);
+               /* find the trackview at the top of the trackview group 
+                *
+                * Note that covers_y_position() is recursive and includes child views
+                */
+               std::pair<TimeAxisView*,double> res = (*t)->covers_y_position (top_of_trackviews);
                
                if (res.first) {
+                       if (skip_child_views) {
+                               break;
+                       }
+                       /* automation lane (one level, non-recursive)
+                        *
+                        * - if no automation lane exists -> move to prev tack
+                        * - if no y-axis match is found -> the current track is at the top -> move to prev track 
+                        *     (actually last automation lane of previous track, see below)
+                        * - if first (top-most) lane is at the top -> move to this track
+                        * - else move up one lane
+                        */
+                       TimeAxisView::Children kids = (*t)->get_child_list();
+                       TimeAxisView::Children::iterator pkid = kids.end();
+
+                       for (TimeAxisView::Children::iterator ci = kids.begin(); ci != kids.end(); ++ci) {
+                               if ((*ci)->hidden()) {
+                                       continue;
+                               }
+
+                               std::pair<TimeAxisView*,double> dev;
+                               dev = (*ci)->covers_y_position (top_of_trackviews);
+                               if (dev.first) {
+                                       /* some automation lane is currently at the top */
+                                       if (ci == kids.begin()) {
+                                               /* first (top-most) autmation lane is at the top.
+                                                * jump directly to this track's top
+                                                */
+                                               ensure_time_axis_view_is_visible (**t, true);
+                                               return true;
+                                       }
+                                       else if (pkid != kids.end()) {
+                                               /* some other automation lane is at the top.
+                                                * move up to prev automation lane.
+                                                */
+                                               ensure_time_axis_view_is_visible (**pkid, true);
+                                               return true;
+                                       }
+                                       assert(0); // not reached
+                                       break;
+                               }
+                               pkid = ci;
+                       }
                        break;
                }
 
@@ -1426,7 +1549,23 @@ Editor::scroll_up_one_track ()
        }
        
        if (prev != track_views.end()) {
-               ensure_time_axis_view_is_visible (**prev, true);
+               // move to bottom-most automation-lane of the previous track
+               TimeAxisView::Children kids = (*prev)->get_child_list();
+               TimeAxisView::Children::reverse_iterator pkid = kids.rend();
+               if (!skip_child_views) {
+                       // find the last visible lane
+                       for (TimeAxisView::Children::reverse_iterator ci = kids.rbegin(); ci != kids.rend(); ++ci) {
+                               if (!(*ci)->hidden()) {
+                                       pkid = ci;
+                                       break;
+                               }
+                       }
+               }
+               if (pkid != kids.rend()) {
+                       ensure_time_axis_view_is_visible (**pkid, true);
+               } else  {
+                       ensure_time_axis_view_is_visible (**prev, true);
+               }
                return true;
        }
 
@@ -1533,7 +1672,7 @@ Editor::temporal_zoom (framecnt_t fpp)
        // would be 4147200000 samples, so 2592000 samples per pixel.
 
        nfpp = min (fpp, (framecnt_t) 2592000);
-       nfpp = max ((framecnt_t) 1, fpp);
+       nfpp = max ((framecnt_t) 1, nfpp);
 
        new_page_size = (framepos_t) floor (_visible_canvas_width * nfpp);
        half_page_size = new_page_size / 2;
@@ -1640,14 +1779,14 @@ Editor::calc_extra_zoom_edges(framepos_t &start, framepos_t &end)
        */
 
        GdkScreen* screen = gdk_screen_get_default ();
-       gint pixwidth = gdk_screen_get_width (screen);
-       gint mmwidth = gdk_screen_get_width_mm (screen);
-       double pix_per_mm = (double) pixwidth/ (double) mmwidth;
-       double one_centimeter_in_pixels = pix_per_mm * 10.0;
+       const gint pixwidth = gdk_screen_get_width (screen);
+       const gint mmwidth = gdk_screen_get_width_mm (screen);
+       const double pix_per_mm = (double) pixwidth/ (double) mmwidth;
+       const double one_centimeter_in_pixels = pix_per_mm * 10.0;
 
-       framepos_t range = end - start;
-       double new_fpp = (double) range / (double) _visible_canvas_width;
-       framepos_t extra_samples = (framepos_t) floor (one_centimeter_in_pixels * new_fpp);
+       const framepos_t range = end - start;
+       const framecnt_t new_fpp = (framecnt_t) ceil ((double) range / (double) _visible_canvas_width);
+       const framepos_t extra_samples = (framepos_t) floor (one_centimeter_in_pixels * new_fpp);
 
        if (start > extra_samples) {
                start -= extra_samples;
@@ -1662,7 +1801,6 @@ Editor::calc_extra_zoom_edges(framepos_t &start, framepos_t &end)
        }
 }
 
-
 void
 Editor::temporal_zoom_region (bool both_axes)
 {
@@ -1670,30 +1808,10 @@ Editor::temporal_zoom_region (bool both_axes)
        framepos_t end = 0;
        set<TimeAxisView*> tracks;
 
-       RegionSelection rs = get_regions_from_selection_and_entered ();
-
-       if (rs.empty()) {
+       if ( !get_selection_extents(start, end) )
                return;
-       }
-
-       for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
-
-               if ((*i)->region()->position() < start) {
-                       start = (*i)->region()->position();
-               }
-
-               if ((*i)->region()->last_frame() + 1 > end) {
-                       end = (*i)->region()->last_frame() + 1;
-               }
-
-               tracks.insert (&((*i)->get_time_axis_view()));
-       }
-
-       if ((start == 0 && end == 0) || end < start) {
-               return;
-       }
-
-       calc_extra_zoom_edges(start, end);
+       
+       calc_extra_zoom_edges (start, end);
 
        /* if we're zooming on both axes we need to save track heights etc.
         */
@@ -1729,35 +1847,73 @@ Editor::temporal_zoom_region (bool both_axes)
        redo_visual_stack.push_back (current_visual_state (both_axes));
 }
 
-void
-Editor::zoom_to_region (bool both_axes)
+
+bool
+Editor::get_selection_extents ( framepos_t &start, framepos_t &end )
 {
-       temporal_zoom_region (both_axes);
+       start = max_framepos;
+       end = 0;
+       bool ret = true;
+       
+       //ToDo:  if notes are selected, set extents to that selection
+
+       //ToDo:  if control points are selected, set extents to that selection
+
+       if ( !selection->regions.empty() ) {
+               RegionSelection rs = get_regions_from_selection_and_entered ();
+
+               for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
+
+                       if ((*i)->region()->position() < start) {
+                               start = (*i)->region()->position();
+                       }
+
+                       if ((*i)->region()->last_frame() + 1 > end) {
+                               end = (*i)->region()->last_frame() + 1;
+                       }
+               }
+
+       } else if (!selection->time.empty()) {
+               start = selection->time.start();
+               end = selection->time.end_frame();
+       } else 
+               ret = false;  //no selection found
+
+       //range check
+       if ((start == 0 && end == 0) || end < start) {
+               ret = false;
+       }
+       
+       return ret;     
 }
 
+
 void
 Editor::temporal_zoom_selection (bool both_axes)
 {
        if (!selection) return;
 
-       //if a range is selected, zoom to that
-       if (!selection->time.empty()) {
+       //ToDo:  if notes are selected, zoom to that
 
-               framepos_t start = selection->time.start();
-               framepos_t end = selection->time.end_frame();
+       //ToDo:  if control points are selected, zoom to that
 
-               calc_extra_zoom_edges(start, end);
+       //if region(s) are selected, zoom to that
+       if ( !selection->regions.empty() )
+               temporal_zoom_region (both_axes);
 
-               temporal_zoom_by_frame (start, end);
+       //if a range is selected, zoom to that
+       if (!selection->time.empty()) {
 
+               framepos_t start,  end;
+               if (get_selection_extents (start, end)) {
+                       calc_extra_zoom_edges(start, end);
+                       temporal_zoom_by_frame (start, end);
+               }
+               
                if (both_axes)
-                       fit_selected_tracks();
-
-       } else {
-               temporal_zoom_region(both_axes);
+                       fit_selection();
        }
 
-
 }
 
 void
@@ -1802,9 +1958,9 @@ Editor::temporal_zoom_by_frame (framepos_t start, framepos_t end)
 
        framepos_t range = end - start;
 
-       double const new_fpp = (double) range / (double) _visible_canvas_width;
-
-       framepos_t new_page = (framepos_t) floor (_visible_canvas_width * new_fpp);
+       const framecnt_t new_fpp = (framecnt_t) ceil ((double) range / (double) _visible_canvas_width);
+       
+       framepos_t new_page = range;
        framepos_t middle = (framepos_t) floor ((double) start + ((double) range / 2.0f));
        framepos_t new_leftmost = (framepos_t) floor ((double) middle - ((double) new_page / 2.0f));
 
@@ -1874,7 +2030,7 @@ Editor::temporal_zoom_to_frame (bool coarser, framepos_t frame)
 bool
 Editor::choose_new_marker_name(string &name) {
 
-       if (!Config->get_name_new_markers()) {
+       if (!ARDOUR_UI::config()->get_name_new_markers()) {
                /* don't prompt user for a new name */
                return true;
        }
@@ -1926,12 +2082,14 @@ Editor::add_location_from_selection ()
        _session->locations()->next_available_name(rangename,"selection");
        Location *location = new Location (*_session, start, end, rangename, Location::IsRangeMarker);
 
-       _session->begin_reversible_command (_("add marker"));
+       begin_reversible_command (_("add marker"));
+       
        XMLNode &before = _session->locations()->get_state();
        _session->locations()->add (location, true);
        XMLNode &after = _session->locations()->get_state();
        _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -1946,12 +2104,14 @@ Editor::add_location_mark (framepos_t where)
                return;
        }
        Location *location = new Location (*_session, where, where, markername, Location::IsMark);
-       _session->begin_reversible_command (_("add marker"));
+       begin_reversible_command (_("add marker"));
+       
        XMLNode &before = _session->locations()->get_state();
        _session->locations()->add (location, true);
        XMLNode &after = _session->locations()->get_state();
        _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -1966,7 +2126,8 @@ Editor::remove_location_at_playhead_cursor ()
        if (_session) {
 
                //set up for undo
-               _session->begin_reversible_command (_("remove marker"));
+               begin_reversible_command (_("remove marker"));
+               
                XMLNode &before = _session->locations()->get_state();
                bool removed = false;
 
@@ -1984,7 +2145,8 @@ Editor::remove_location_at_playhead_cursor ()
                if (removed) {
                        XMLNode &after = _session->locations()->get_state();
                        _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-                       _session->commit_reversible_command ();
+                       
+                       commit_reversible_command ();
                }
        }
 }
@@ -1999,7 +2161,8 @@ Editor::add_locations_from_region ()
                return;
        }
 
-       _session->begin_reversible_command (selection->regions.size () > 1 ? _("add markers") : _("add marker"));
+       begin_reversible_command (selection->regions.size () > 1 ? _("add markers") : _("add marker"));
+       
        XMLNode &before = _session->locations()->get_state();
 
        for (RegionSelection::iterator i = rs.begin (); i != rs.end (); ++i) {
@@ -2013,7 +2176,8 @@ Editor::add_locations_from_region ()
 
        XMLNode &after = _session->locations()->get_state();
        _session->add_command (new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 /** Add a single range marker around all selected regions */
@@ -2026,7 +2190,8 @@ Editor::add_location_from_region ()
                return;
        }
 
-       _session->begin_reversible_command (_("add marker"));
+       begin_reversible_command (_("add marker"));
+       
        XMLNode &before = _session->locations()->get_state();
 
        string markername;
@@ -2049,7 +2214,8 @@ Editor::add_location_from_region ()
 
        XMLNode &after = _session->locations()->get_state();
        _session->add_command (new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 /* MARKS */
@@ -2105,12 +2271,14 @@ void
 Editor::clear_markers ()
 {
        if (_session) {
-               _session->begin_reversible_command (_("clear markers"));
+               begin_reversible_command (_("clear markers"));
+               
                XMLNode &before = _session->locations()->get_state();
                _session->locations()->clear_markers ();
                XMLNode &after = _session->locations()->get_state();
                _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-               _session->commit_reversible_command ();
+               
+               commit_reversible_command ();
        }
 }
 
@@ -2118,27 +2286,30 @@ void
 Editor::clear_ranges ()
 {
        if (_session) {
-               _session->begin_reversible_command (_("clear ranges"));
+               begin_reversible_command (_("clear ranges"));
+               
                XMLNode &before = _session->locations()->get_state();
 
                _session->locations()->clear_ranges ();
 
                XMLNode &after = _session->locations()->get_state();
                _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-               _session->commit_reversible_command ();
+               
+               commit_reversible_command ();
        }
 }
 
 void
 Editor::clear_locations ()
 {
-       _session->begin_reversible_command (_("clear locations"));
+       begin_reversible_command (_("clear locations"));
+       
        XMLNode &before = _session->locations()->get_state();
        _session->locations()->clear ();
        XMLNode &after = _session->locations()->get_state();
        _session->add_command(new MementoCommand<Locations>(*(_session->locations()), &before, &after));
-       _session->commit_reversible_command ();
-       _session->locations()->clear ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -2285,11 +2456,15 @@ Editor::play_from_edit_point_and_return ()
 void
 Editor::play_selection ()
 {
-       if (selection->time.empty()) {
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
                return;
-       }
 
-       _session->request_play_range (&selection->time, true);
+       AudioRange ar (start, end, 0);
+       list<AudioRange> lar;
+       lar.push_back (ar);
+
+       _session->request_play_range (&lar, true);
 }
 
 framepos_t
@@ -2302,7 +2477,7 @@ Editor::get_preroll ()
 void
 Editor::maybe_locate_with_edit_preroll ( framepos_t location )
 {
-       if ( _session->transport_rolling() || !Config->get_follow_edits() || _ignore_follow_edits )
+       if ( _session->transport_rolling() || !ARDOUR_UI::config()->get_follow_edits() || _ignore_follow_edits )
                return;
 
        location -= get_preroll();
@@ -2322,16 +2497,17 @@ Editor::maybe_locate_with_edit_preroll ( framepos_t location )
 void
 Editor::play_with_preroll ()
 {
-       if (selection->time.empty()) {
-               return;
-       } else {
+       {
                framepos_t preroll = get_preroll();
                
-               framepos_t start = 0;
-               if (selection->time[clicked_selection].start > preroll)
-                       start = selection->time[clicked_selection].start - preroll;
+               framepos_t start, end;
+               if (!get_selection_extents ( start, end))
+                       return;
+
+               if (start > preroll)
+                       start = start - preroll;
                
-               framepos_t end = selection->time[clicked_selection].end + preroll;
+               end = end + preroll;  //"post-roll"
                
                AudioRange ar (start, end, 0);
                list<AudioRange> lar;
@@ -2644,8 +2820,14 @@ Editor::create_region_from_selection (vector<boost::shared_ptr<Region> >& new_re
                return;
        }
 
-       framepos_t start = selection->time[clicked_selection].start;
-       framepos_t end = selection->time[clicked_selection].end;
+       framepos_t start, end;
+       if (clicked_selection) {
+               start = selection->time[clicked_selection].start;
+               end = selection->time[clicked_selection].end;
+       } else {
+               start = selection->time.start();
+               end = selection->time.end_frame();
+       }
 
        TrackViewList ts = selection->tracks.filter_to_unique_playlists ();
        sort_track_selection (ts);
@@ -2704,6 +2886,7 @@ static void
 add_if_covered (RegionView* rv, const AudioRange* ar, RegionSelection* rs)
 {
        switch (rv->region()->coverage (ar->start, ar->end - 1)) {
+       // n.b. -1 because AudioRange::end is one past the end, but coverage expects inclusive ranges
        case Evoral::OverlapNone:
                break;
        default:
@@ -3642,14 +3825,13 @@ Editor::freeze_route ()
 
        pthread_create_and_store (X_("freezer"), &itt.thread, _freeze_thread, this);
 
-       set_canvas_cursor (_cursors->wait);
+       CursorContext::Handle cursor_ctx = CursorContext::create(*this, _cursors->wait);
 
        while (!itt.done && !itt.cancel) {
                gtk_main_iteration ();
        }
 
        current_interthread_info = 0;
-       set_canvas_cursor (current_canvas_cursor);
 }
 
 void
@@ -3829,44 +4011,21 @@ Editor::cut_copy (CutCopyOp op)
                return;
        }
 
-       if (internal_editing()) {
-
-               switch (effective_mouse_mode()) {
-               case MouseObject:
-               case MouseRange:
-                       begin_reversible_command (opname + ' ' + X_("MIDI"));
-                       cut_copy_midi (op);
-                       commit_reversible_command ();
-                       break;
-               default:
-                       break;
-               }
-
+       switch (mouse_mode) {
+       case MouseDraw:
+       case MouseContent:
+               begin_reversible_command (opname + ' ' + X_("MIDI"));
+               cut_copy_midi (op);
+               commit_reversible_command ();
                return;
+       default:
+               break;
        }
 
        bool did_edit = false;
 
-       if (!selection->points.empty()) {
-               begin_reversible_command (opname + _(" points"));
-               did_edit = true;
-               cut_copy_points (op);
-               if (op == Cut || op == Delete) {
-                       selection->clear_points ();
-               }
-       } else if (!selection->regions.empty() || !selection->points.empty()) {
-
-               string thing_name;
-
-               if (selection->regions.empty()) {
-                       thing_name = _("points");
-               } else if (selection->points.empty()) {
-                       thing_name = _("regions");
-               } else {
-                       thing_name = _("objects");
-               }
-       
-               begin_reversible_command (opname + ' ' + thing_name);
+       if (!selection->regions.empty() || !selection->points.empty()) {
+               begin_reversible_command (opname + ' ' + _("objects"));
                did_edit = true;
 
                if (!selection->regions.empty()) {
@@ -3893,7 +4052,7 @@ Editor::cut_copy (CutCopyOp op)
                        selection->set (start, end);
                }
        } else if (!selection->time.empty()) {
-               begin_reversible_command (opname + _(" range"));
+               begin_reversible_command (opname + ' ' + _("range"));
 
                did_edit = true;
                cut_copy_ranges (op);
@@ -3904,6 +4063,9 @@ Editor::cut_copy (CutCopyOp op)
        }
        
        if (did_edit) {
+               /* reset repeated paste state */
+               paste_count    = 0;
+               last_paste_pos = 0;
                commit_reversible_command ();   
        }
        
@@ -3913,10 +4075,11 @@ Editor::cut_copy (CutCopyOp op)
 }
 
 struct AutomationRecord {
-       AutomationRecord () : state (0) {}
-       AutomationRecord (XMLNode* s) : state (s) {}
+       AutomationRecord () : state (0) , line(NULL) {}
+       AutomationRecord (XMLNode* s, const AutomationLine* l) : state (s) , line (l) {}
        
        XMLNode* state; ///< state before any operation
+       const AutomationLine* line; ///< line this came from
        boost::shared_ptr<Evoral::ControlList> copy; ///< copied events for the cut buffer
 };
 
@@ -3924,7 +4087,7 @@ struct AutomationRecord {
  *  @param op Operation (Cut, Copy or Clear)
  */
 void
-Editor::cut_copy_points (CutCopyOp op)
+Editor::cut_copy_points (Editing::CutCopyOp op, Evoral::Beats earliest, bool midi)
 {
        if (selection->points.empty ()) {
                return;
@@ -3939,12 +4102,13 @@ Editor::cut_copy_points (CutCopyOp op)
 
        /* Go through all selected points, making an AutomationRecord for each distinct AutomationList */
        for (PointSelection::iterator i = selection->points.begin(); i != selection->points.end(); ++i) {
-               boost::shared_ptr<AutomationList> al = (*i)->line().the_list();
+               const AutomationLine&                   line = (*i)->line();
+               const boost::shared_ptr<AutomationList> al   = line.the_list();
                if (lists.find (al) == lists.end ()) {
                        /* We haven't seen this list yet, so make a record for it.  This includes
                           taking a copy of its current state, in case this is needed for undo later.
                        */
-                       lists[al] = AutomationRecord (&al->get_state ());
+                       lists[al] = AutomationRecord (&al->get_state (), &line);
                }
        }
 
@@ -3953,21 +4117,46 @@ Editor::cut_copy_points (CutCopyOp op)
                   ControlList for each of our source lists to put the cut buffer data in.
                */
                for (Lists::iterator i = lists.begin(); i != lists.end(); ++i) {
-                       i->second.copy = i->first->create (i->first->parameter ());
+                       i->second.copy = i->first->create (i->first->parameter (), i->first->descriptor());
                }
 
                /* Add all selected points to the relevant copy ControlLists */
+               framepos_t start = std::numeric_limits<framepos_t>::max();
                for (PointSelection::iterator i = selection->points.begin(); i != selection->points.end(); ++i) {
                        boost::shared_ptr<AutomationList> al = (*i)->line().the_list();
-                       AutomationList::const_iterator j = (*i)->model ();
-                       lists[al].copy->add ((*j)->when, (*j)->value);
+                       AutomationList::const_iterator    j  = (*i)->model();
+
+                       lists[al].copy->fast_simple_add ((*j)->when, (*j)->value);
+                       if (midi) {
+                               /* Update earliest MIDI start time in beats */
+                               earliest = std::min(earliest, Evoral::Beats((*j)->when));
+                       } else {
+                               /* Update earliest session start time in frames */
+                               start = std::min(start, (*i)->line().session_position(j));
+                       }
                }
 
+               /* Snap start time backwards, so copy/paste is snap aligned. */
+               if (midi) {
+                       if (earliest == Evoral::Beats::max()) {
+                               earliest = Evoral::Beats();  // Weird... don't offset
+                       }
+                       earliest.round_down_to_beat();
+               } else {
+                       if (start == std::numeric_limits<double>::max()) {
+                               start = 0;  // Weird... don't offset
+                       }
+                       snap_to(start, RoundDownMaybe);
+               }
+
+               const double line_offset = midi ? earliest.to_double() : start;
                for (Lists::iterator i = lists.begin(); i != lists.end(); ++i) {
-                       /* Correct this copy list so that it starts at time 0 */
-                       double const start = i->second.copy->front()->when;
+                       /* Correct this copy list so that it is relative to the earliest
+                          start time, so relative ordering between points is preserved
+                          when copying from several lists and the paste starts at the
+                          earliest copied piece of data. */
                        for (AutomationList::iterator j = i->second.copy->begin(); j != i->second.copy->end(); ++j) {
-                               (*j)->when -= start;
+                               (*j)->when -= line_offset;
                        }
 
                        /* And add it to the cut buffer */
@@ -4003,13 +4192,27 @@ Editor::cut_copy_points (CutCopyOp op)
 void
 Editor::cut_copy_midi (CutCopyOp op)
 {
+       Evoral::Beats earliest = Evoral::Beats::max();
        for (MidiRegionSelection::iterator i = selection->midi_regions.begin(); i != selection->midi_regions.end(); ++i) {
-               MidiRegionView* mrv = *i;
-               mrv->cut_copy_clear (op);
-       }
-}
+               MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*i);
+               if (mrv) {
+                       if (!mrv->selection().empty()) {
+                               earliest = std::min(earliest, (*mrv->selection().begin())->note()->time());
+                       }
+                       mrv->cut_copy_clear (op);
 
+                       /* XXX: not ideal, as there may be more than one track involved in the selection */
+                       _last_cut_copy_source_track = &mrv->get_time_axis_view();
+               }
+       }
 
+       if (!selection->points.empty()) {
+               cut_copy_points (op, earliest, true);
+               if (op == Cut || op == Delete) {
+                       selection->clear_points ();
+               }
+       }
+}
 
 struct lt_playlist {
     bool operator () (const PlaylistState& a, const PlaylistState& b) {
@@ -4032,6 +4235,8 @@ Editor::remove_clicked_region ()
                return;
        }
 
+       begin_reversible_command (_("remove region"));
+
        boost::shared_ptr<Playlist> playlist = clicked_routeview->playlist();
 
        playlist->clear_changes ();
@@ -4350,14 +4555,8 @@ Editor::paste_internal (framepos_t position, float times)
 {
         DEBUG_TRACE (DEBUG::CutNPaste, string_compose ("apparent paste position is %1\n", position));
 
-       if (internal_editing()) {
-               if (cut_buffer->midi_notes.empty()) {
-                       return;
-               }
-       } else {
-               if (cut_buffer->empty()) {
-                       return;
-               }
+       if (cut_buffer->empty(internal_editing())) {
+               return;
        }
 
        if (position == max_framepos) {
@@ -4365,60 +4564,99 @@ Editor::paste_internal (framepos_t position, float times)
                 DEBUG_TRACE (DEBUG::CutNPaste, string_compose ("preferred edit position is %1\n", position));
        }
 
-       TrackViewList ts;
-       TrackViewList::iterator i;
-       size_t nth;
+       if (position == last_paste_pos) {
+               /* repeated paste in the same position */
+               ++paste_count;
+       } else {
+               /* paste in new location, reset repeated paste state */
+               paste_count = 0;
+               last_paste_pos = position;
+       }
 
        /* get everything in the correct order */
 
-       if (_edit_point == Editing::EditAtMouse && entered_track) {
-               /* With the mouse edit point, paste onto the track under the mouse */
-               ts.push_back (entered_track);
-       } else if (!selection->tracks.empty()) {
-               /* Otherwise, if there are some selected tracks, paste to them */
+       TrackViewList ts;
+       if (!selection->tracks.empty()) {
+               /* If there is a track selection, paste into exactly those tracks and
+                  only those tracks.  This allows the user to be explicit and override
+                  the below "do the reasonable thing" logic. */
                ts = selection->tracks.filter_to_unique_playlists ();
                sort_track_selection (ts);
-       } else if (_last_cut_copy_source_track) {
-               /* Otherwise paste to the track that the cut/copy came from;
-                  see discussion in mantis #3333.
-               */
-               ts.push_back (_last_cut_copy_source_track);
-       }
-
-       if (internal_editing ()) {
+       } else {
+               /* Figure out which track to base the paste at. */
+               TimeAxisView* base_track = NULL;
+               if (_edit_point == Editing::EditAtMouse && entered_track) {
+                       /* With the mouse edit point, paste onto the track under the mouse. */
+                       base_track = entered_track;
+               } else if (_edit_point == Editing::EditAtMouse && entered_regionview) {
+                       /* With the mouse edit point, paste onto the track of the region under the mouse. */
+                       base_track = &entered_regionview->get_time_axis_view();
+               } else if (_last_cut_copy_source_track) {
+                       /* Paste to the track that the cut/copy came from (see mantis #333). */
+                       base_track = _last_cut_copy_source_track;
+               } else {
+                       /* This is "impossible" since we've copied... well, do nothing. */
+                       return;
+               }
 
-               /* undo/redo is handled by individual tracks/regions */
+               /* Walk up to parent if necessary, so base track is a route. */
+               while (base_track->get_parent()) {
+                       base_track = base_track->get_parent();
+               }
 
-               for (nth = 0, i = ts.begin(); i != ts.end(); ++i, ++nth) {
+               /* Add base track and all tracks below it.  The paste logic will select
+                  the appropriate object types from the cut buffer in relative order. */
+               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+                       if ((*i)->order() >= base_track->order()) {
+                               ts.push_back(*i);
+                       }
+               }
 
-                       RegionSelection rs;
-                       RegionSelection::iterator r;
-                       MidiNoteSelection::iterator cb;
+               /* Sort tracks so the nth track of type T will pick the nth object of type T. */
+               sort_track_selection (ts);
 
-                       get_regions_at (rs, position, ts);
+               /* Add automation children of each track in order, for pasting several lines. */
+               for (TrackViewList::iterator i = ts.begin(); i != ts.end();) {
+                       /* Add any automation children for pasting several lines */
+                       RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(*i++);
+                       if (!rtv) {
+                               continue;
+                       }
 
-                       for (cb = cut_buffer->midi_notes.begin(), r = rs.begin();
-                            cb != cut_buffer->midi_notes.end() && r != rs.end(); ++r) {
-                               MidiRegionView* mrv = dynamic_cast<MidiRegionView*> (*r);
-                               if (mrv) {
-                                       mrv->paste (position, times, **cb);
-                                       ++cb;
-                               }
+                       typedef RouteTimeAxisView::AutomationTracks ATracks;
+                       const ATracks& atracks = rtv->automation_tracks();
+                       for (ATracks::const_iterator a = atracks.begin(); a != atracks.end(); ++a) {
+                               i = ts.insert(i, a->second.get());
+                               ++i;
                        }
                }
 
-       } else {
+               /* We now have a list of trackviews starting at base_track, including
+                  automation children, in the order shown in the editor, e.g. R1,
+                  R1.A1, R1.A2, R2, R2.A1, ... */
+       }
 
-               /* we do redo (do you do voodoo?) */
+       begin_reversible_command (Operations::paste);
 
-               begin_reversible_command (Operations::paste);
+       if (ts.size() == 1 && cut_buffer->lines.size() == 1 &&
+           dynamic_cast<AutomationTimeAxisView*>(ts.front())) {
+           /* Only one line copied, and one automation track selected.  Do a
+              "greedy" paste from one automation type to another. */
 
-               for (nth = 0, i = ts.begin(); i != ts.end(); ++i, ++nth) {
-                       (*i)->paste (position, times, *cut_buffer, nth);
-               }
+           PasteContext ctx(paste_count, times, ItemCounts(), true);
+           ts.front()->paste (position, *cut_buffer, ctx);
 
-               commit_reversible_command ();
+       } else {
+
+               /* Paste into tracks */
+
+               PasteContext ctx(paste_count, times, ItemCounts(), false);
+               for (TrackViewList::iterator i = ts.begin(); i != ts.end(); ++i) {
+                       (*i)->paste (position, *cut_buffer, ctx);
+               }
        }
+
+       commit_reversible_command ();
 }
 
 void
@@ -4454,11 +4692,11 @@ Editor::duplicate_some_regions (RegionSelection& regions, float times)
                foo.insert (foo.end(), latest_regionviews.begin(), latest_regionviews.end());
        }
 
-       commit_reversible_command ();
-
        if (!foo.empty()) {
                selection->set (foo);
        }
+
+       commit_reversible_command ();
 }
 
 void
@@ -4489,7 +4727,13 @@ Editor::duplicate_selection (float times)
                        continue;
                }
                playlist->clear_changes ();
-               playlist->duplicate (*ri, selection->time[clicked_selection].end, times);
+               framepos_t end;
+               if (clicked_selection) {
+                       end = selection->time[clicked_selection].end;
+               } else {
+                       end = selection->time.end_frame();
+               }
+               playlist->duplicate (*ri, end, times);
                _session->add_command (new StatefulDiffCommand (playlist));
 
                ++ri;
@@ -4631,7 +4875,7 @@ Editor::normalize_region ()
                return;
        }
 
-       set_canvas_cursor (_cursors->wait);
+       CursorContext::Handle cursor_ctx = CursorContext::create(*this, _cursors->wait);
        gdk_flush ();
 
        /* XXX: should really only count audio regions here */
@@ -4650,7 +4894,6 @@ Editor::normalize_region ()
 
                        if (a == -1) {
                                /* the user cancelled the operation */
-                               set_canvas_cursor (current_canvas_cursor);
                                return;
                        }
 
@@ -4681,7 +4924,6 @@ Editor::normalize_region ()
        }
 
        commit_reversible_command ();
-       set_canvas_cursor (current_canvas_cursor);
 }
 
 
@@ -4796,39 +5038,35 @@ Editor::strip_region_silence ()
 Command*
 Editor::apply_midi_note_edit_op_to_region (MidiOperator& op, MidiRegionView& mrv)
 {
-       Evoral::Sequence<Evoral::MusicalTime>::Notes selected;
+       Evoral::Sequence<Evoral::Beats>::Notes selected;
        mrv.selection_as_notelist (selected, true);
 
-       vector<Evoral::Sequence<Evoral::MusicalTime>::Notes> v;
+       vector<Evoral::Sequence<Evoral::Beats>::Notes> v;
        v.push_back (selected);
 
-       framepos_t pos_frames = mrv.midi_region()->position() - mrv.midi_region()->start();
-       double     pos_beats  = _session->tempo_map().framewalk_to_beats(0, pos_frames);
+       framepos_t    pos_frames = mrv.midi_region()->position() - mrv.midi_region()->start();
+       Evoral::Beats pos_beats  = _session->tempo_map().framewalk_to_beats(0, pos_frames);
 
        return op (mrv.midi_region()->model(), pos_beats, v);
 }
 
 void
-Editor::apply_midi_note_edit_op (MidiOperator& op)
+Editor::apply_midi_note_edit_op (MidiOperator& op, const RegionSelection& rs)
 {
-       Command* cmd;
-
-       RegionSelection rs = get_regions_from_selection_and_entered ();
-
        if (rs.empty()) {
                return;
        }
 
        begin_reversible_command (op.name ());
 
-       for (RegionSelection::iterator r = rs.begin(); r != rs.end(); ) {
-               RegionSelection::iterator tmp = r;
+       for (RegionSelection::const_iterator r = rs.begin(); r != rs.end(); ) {
+               RegionSelection::const_iterator tmp = r;
                ++tmp;
 
                MidiRegionView* const mrv = dynamic_cast<MidiRegionView*> (*r);
 
                if (mrv) {
-                       cmd = apply_midi_note_edit_op_to_region (op, *mrv);
+                       Command* cmd = apply_midi_note_edit_op_to_region (op, *mrv);
                        if (cmd) {
                                (*cmd)();
                                _session->add_command (cmd);
@@ -4852,7 +5090,7 @@ Editor::fork_region ()
 
        begin_reversible_command (_("Fork Region(s)"));
 
-       set_canvas_cursor (_cursors->wait);
+       CursorContext::Handle cursor_ctx = CursorContext::create(*this, _cursors->wait);
        gdk_flush ();
 
        for (RegionSelection::iterator r = rs.begin(); r != rs.end(); ) {
@@ -4879,48 +5117,81 @@ Editor::fork_region ()
        }
 
        commit_reversible_command ();
-
-       set_canvas_cursor (current_canvas_cursor);
 }
 
 void
 Editor::quantize_region ()
 {
-       int selected_midi_region_cnt = 0;
+       if (_session) {
+               quantize_regions(get_regions_from_selection_and_entered ());
+       }
+}
 
-       if (!_session) {
+void
+Editor::quantize_regions (const RegionSelection& rs)
+{
+       if (rs.n_midi_regions() == 0) {
                return;
        }
 
-       RegionSelection rs = get_regions_from_selection_and_entered ();
+       QuantizeDialog* qd = new QuantizeDialog (*this);
 
-       if (rs.empty()) {
+       qd->present ();
+       const int r = qd->run ();
+       qd->hide ();
+
+       if (r == Gtk::RESPONSE_OK) {
+               Quantize quant (qd->snap_start(), qd->snap_end(),
+                               qd->start_grid_size(), qd->end_grid_size(),
+                               qd->strength(), qd->swing(), qd->threshold());
+
+               apply_midi_note_edit_op (quant, rs);
+       }
+}
+
+void
+Editor::legatize_region (bool shrink_only)
+{
+       if (_session) {
+               legatize_regions(get_regions_from_selection_and_entered (), shrink_only);
+       }
+}
+
+void
+Editor::legatize_regions (const RegionSelection& rs, bool shrink_only)
+{
+       if (rs.n_midi_regions() == 0) {
                return;
        }
 
-       for (RegionSelection::iterator r = rs.begin(); r != rs.end(); ++r) {
-               MidiRegionView* const mrv = dynamic_cast<MidiRegionView*> (*r);
-               if (mrv) {
-                       selected_midi_region_cnt++;
-               }
+       Legatize legatize(shrink_only);
+       apply_midi_note_edit_op (legatize, rs);
+}
+
+void
+Editor::transform_region ()
+{
+       if (_session) {
+               transform_regions(get_regions_from_selection_and_entered ());
        }
+}
 
-       if (selected_midi_region_cnt == 0) {
+void
+Editor::transform_regions (const RegionSelection& rs)
+{
+       if (rs.n_midi_regions() == 0) {
                return;
        }
 
-       QuantizeDialog* qd = new QuantizeDialog (*this);
+       TransformDialog* td = new TransformDialog();
 
-       qd->present ();
-       const int r = qd->run ();
-       qd->hide ();
+       td->present();
+       const int r = td->run();
+       td->hide();
 
        if (r == Gtk::RESPONSE_OK) {
-               Quantize quant (*_session, qd->snap_start(), qd->snap_end(),
-                               qd->start_grid_size(), qd->end_grid_size(),
-                               qd->strength(), qd->swing(), qd->threshold());
-
-               apply_midi_note_edit_op (quant);
+               Transform transform(td->get());
+               apply_midi_note_edit_op(transform, rs);
        }
 }
 
@@ -4941,7 +5212,7 @@ Editor::insert_patch_change (bool from_context)
        */
        MidiRegionView* first = dynamic_cast<MidiRegionView*> (rs.front ());
 
-       Evoral::PatchChange<Evoral::MusicalTime> empty (0, 0, 0, 0);
+       Evoral::PatchChange<Evoral::Beats> empty (Evoral::Beats(), 0, 0, 0);
         PatchChangeDialog d (0, _session, empty, first->instrument_info(), Gtk::Stock::ADD);
 
        if (d.run() == RESPONSE_CANCEL) {
@@ -4969,7 +5240,7 @@ Editor::apply_filter (Filter& filter, string command, ProgressReporter* progress
 
        begin_reversible_command (command);
 
-       set_canvas_cursor (_cursors->wait);
+       CursorContext::Handle cursor_ctx = CursorContext::create(*this, _cursors->wait);
        gdk_flush ();
 
        int n = 0;
@@ -5022,7 +5293,7 @@ Editor::apply_filter (Filter& filter, string command, ProgressReporter* progress
                                
                                _session->add_command(new StatefulDiffCommand (playlist));
                        } else {
-                               goto out;
+                               return;
                        }
 
                        if (progress) {
@@ -5035,9 +5306,6 @@ Editor::apply_filter (Filter& filter, string command, ProgressReporter* progress
        }
 
        commit_reversible_command ();
-
-  out:
-       set_canvas_cursor (current_canvas_cursor);
 }
 
 void
@@ -5055,8 +5323,8 @@ Editor::reset_region_gain_envelopes ()
                return;
        }
 
-       _session->begin_reversible_command (_("reset region gain"));
-
+       begin_reversible_command (_("reset region gain"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
                if (arv) {
@@ -5067,8 +5335,8 @@ Editor::reset_region_gain_envelopes ()
                        _session->add_command (new MementoCommand<AutomationList>(*arv->audio_region()->envelope().get(), &before, &alist->get_state()));
                }
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5108,8 +5376,8 @@ Editor::toggle_gain_envelope_active ()
                return;
        }
 
-       _session->begin_reversible_command (_("region gain envelope active"));
-
+       begin_reversible_command (_("region gain envelope active"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
                if (arv) {
@@ -5118,8 +5386,8 @@ Editor::toggle_gain_envelope_active ()
                        _session->add_command (new StatefulDiffCommand (arv->region()));
                }
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5135,15 +5403,15 @@ Editor::toggle_region_lock ()
                return;
        }
 
-       _session->begin_reversible_command (_("toggle region lock"));
-
+       begin_reversible_command (_("toggle region lock"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                (*i)->region()->clear_changes ();
                (*i)->region()->set_locked (!(*i)->region()->locked());
                _session->add_command (new StatefulDiffCommand ((*i)->region()));
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5159,15 +5427,15 @@ Editor::toggle_region_video_lock ()
                return;
        }
 
-       _session->begin_reversible_command (_("Toggle Video Lock"));
-
+       begin_reversible_command (_("Toggle Video Lock"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                (*i)->region()->clear_changes ();
                (*i)->region()->set_video_locked (!(*i)->region()->video_locked());
                _session->add_command (new StatefulDiffCommand ((*i)->region()));
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5183,16 +5451,16 @@ Editor::toggle_region_lock_style ()
                return;
        }
 
-       _session->begin_reversible_command (_("region lock style"));
-
+       begin_reversible_command (_("region lock style"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                (*i)->region()->clear_changes ();
                PositionLockStyle const ns = (*i)->region()->position_lock_style() == AudioTime ? MusicTime : AudioTime;
                (*i)->region()->set_position_lock_style (ns);
                _session->add_command (new StatefulDiffCommand ((*i)->region()));
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5208,15 +5476,15 @@ Editor::toggle_opaque_region ()
                return;
        }
 
-       _session->begin_reversible_command (_("change region opacity"));
-
+       begin_reversible_command (_("change region opacity"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
                (*i)->region()->clear_changes ();
                (*i)->region()->set_opaque (!(*i)->region()->opaque());
                _session->add_command (new StatefulDiffCommand ((*i)->region()));
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -5614,27 +5882,33 @@ Editor::set_playhead_cursor ()
                }
        }
 
-       if ( Config->get_follow_edits() )
+       if (ARDOUR_UI::config()->get_follow_edits()) {
                cancel_time_selection();
+       }
 }
 
 void
 Editor::split_region ()
 {
+       //if a range is selected, separate it
        if ( !selection->time.empty()) {
                separate_regions_between (selection->time);
                return;
        }
 
-       RegionSelection rs = get_regions_from_selection_and_edit_point ();
+       //if no range was selected, try to find some regions to split
+       if (current_mouse_mode() == MouseObject) {  //don't try this for Internal Edit, Stretch, Draw, etc.
+       
+               RegionSelection rs = get_regions_from_selection_and_edit_point ();
 
-       framepos_t where = get_preferred_edit_position ();
+               framepos_t where = get_preferred_edit_position ();
 
-       if (rs.empty()) {
-               return;
-       }
+               if (rs.empty()) {
+                       return;
+               }
 
-       split_regions_at (where, rs);
+               split_regions_at (where, rs);
+       }
 }
 
 struct EditorOrderRouteSorter {
@@ -5708,64 +5982,28 @@ Editor::select_prev_route()
 
 void
 Editor::set_loop_from_selection (bool play)
-{
-       if (_session == 0 || selection->time.empty()) {
-               return;
-       }
-
-       framepos_t start = selection->time[clicked_selection].start;
-       framepos_t end = selection->time[clicked_selection].end;
-
-       set_loop_range (start, end,  _("set loop range from selection"));
-
-       if (play) {
-               _session->request_locate (start, true);
-               _session->request_play_loop (true);
-       }
-}
-
-void
-Editor::set_loop_from_edit_range (bool play)
 {
        if (_session == 0) {
                return;
        }
 
-       framepos_t start;
-       framepos_t end;
-
-       if (!get_edit_op_range (start, end)) {
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
                return;
-       }
 
-       set_loop_range (start, end,  _("set loop range from edit range"));
+       set_loop_range (start, end,  _("set loop range from selection"));
 
        if (play) {
-               _session->request_locate (start, true);
-               _session->request_play_loop (true);
+               _session->request_play_loop (true, true);
        }
 }
 
 void
 Editor::set_loop_from_region (bool play)
 {
-       framepos_t start = max_framepos;
-       framepos_t end = 0;
-
-       RegionSelection rs = get_regions_from_selection_and_entered ();
-
-       if (rs.empty()) {
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
                return;
-       }
-
-       for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
-               if ((*i)->region()->position() < start) {
-                       start = (*i)->region()->position();
-               }
-               if ((*i)->region()->last_frame() + 1 > end) {
-                       end = (*i)->region()->last_frame() + 1;
-               }
-       }
 
        set_loop_range (start, end, _("set loop range from region"));
 
@@ -5778,53 +6016,52 @@ Editor::set_loop_from_region (bool play)
 void
 Editor::set_punch_from_selection ()
 {
-       if (_session == 0 || selection->time.empty()) {
+       if (_session == 0) {
                return;
        }
 
-       framepos_t start = selection->time[clicked_selection].start;
-       framepos_t end = selection->time[clicked_selection].end;
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
+               return;
 
        set_punch_range (start, end,  _("set punch range from selection"));
 }
 
 void
-Editor::set_punch_from_edit_range ()
+Editor::set_session_extents_from_selection ()
 {
        if (_session == 0) {
                return;
        }
+       
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
+               return;
 
-       framepos_t start;
-       framepos_t end;
+       begin_reversible_command (_("set session start/end from selection"));
 
-       if (!get_edit_op_range (start, end)) {
-               return;
-       }
+       Location* loc;
+       if ((loc = _session->locations()->session_range_location()) == 0) {
+               _session->set_session_extents ( start, end );  // this will create a new session range;  no need for UNDO
+       } else {
+               XMLNode &before = loc->get_state();
+
+               _session->set_session_extents ( start, end );
+
+               XMLNode &after = loc->get_state();
+
+               _session->add_command (new MementoCommand<Location>(*loc, &before, &after));
 
-       set_punch_range (start, end,  _("set punch range from edit range"));
+               commit_reversible_command ();
+       }
 }
 
 void
 Editor::set_punch_from_region ()
 {
-       framepos_t start = max_framepos;
-       framepos_t end = 0;
-
-       RegionSelection rs = get_regions_from_selection_and_entered ();
-
-       if (rs.empty()) {
+       framepos_t start, end;
+       if (!get_selection_extents ( start, end))
                return;
-       }
-
-       for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ++i) {
-               if ((*i)->region()->position() < start) {
-                       start = (*i)->region()->position();
-               }
-               if ((*i)->region()->last_frame() + 1 > end) {
-                       end = (*i)->region()->last_frame() + 1;
-               }
-       }
 
        set_punch_range (start, end, _("set punch range from region"));
 }
@@ -5996,8 +6233,8 @@ Editor::split_region_at_transients ()
                return;
        }
 
-       _session->begin_reversible_command (_("split regions"));
-
+       begin_reversible_command (_("split regions"));
+       
        for (RegionSelection::iterator i = rs.begin(); i != rs.end(); ) {
 
                RegionSelection::iterator tmp;
@@ -6014,8 +6251,8 @@ Editor::split_region_at_transients ()
 
                i = tmp;
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 
 }
 
@@ -6203,14 +6440,14 @@ Editor::place_transient()
 
        framepos_t where = get_preferred_edit_position();
 
-       _session->begin_reversible_command (_("place transient"));
-
+       begin_reversible_command (_("place transient"));
+       
        for (RegionSelection::iterator r = rs.begin(); r != rs.end(); ++r) {
                framepos_t position = (*r)->region()->position();
                (*r)->region()->add_transient(where - position);
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -6238,8 +6475,8 @@ Editor::snap_regions_to_grid ()
                return;
        }
 
-       _session->begin_reversible_command (_("snap regions to grid"));
-
+       begin_reversible_command (_("snap regions to grid"));
+       
        for (RegionSelection::iterator r = rs.begin(); r != rs.end(); ++r) {
 
                boost::shared_ptr<Playlist> pl = (*r)->region()->playlist();
@@ -6262,8 +6499,8 @@ Editor::snap_regions_to_grid ()
                (*i)->thaw();
                used_playlists.pop_front();
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -6321,8 +6558,8 @@ Editor::close_region_gaps ()
 
        /* Iterate over the region list and make adjacent regions overlap by crossfade_len_ms */
 
-       _session->begin_reversible_command (_("close region gaps"));
-
+       begin_reversible_command (_("close region gaps"));
+       
        int idx = 0;
        boost::shared_ptr<Region> last_region;
 
@@ -6361,8 +6598,8 @@ Editor::close_region_gaps ()
                (*i)->thaw();
                used_playlists.pop_front();
        }
-
-       _session->commit_reversible_command ();
+       
+       commit_reversible_command ();
 }
 
 void
@@ -6455,7 +6692,7 @@ Editor::playhead_forward_to_grid ()
        framepos_t pos = playhead_cursor->current_frame ();
        if (pos < max_framepos - 1) {
                pos += 2;
-               snap_to_internal (pos, 1, false);
+               snap_to_internal (pos, RoundUpAlways, false);
                _session->request_locate (pos);
        }
 }
@@ -6471,7 +6708,7 @@ Editor::playhead_backward_to_grid ()
        framepos_t pos = playhead_cursor->current_frame ();
        if (pos > 2) {
                pos -= 2;
-               snap_to_internal (pos, -1, false);
+               snap_to_internal (pos, RoundDownAlways, false);
                _session->request_locate (pos);
        }
 }
@@ -6512,6 +6749,23 @@ Editor::toggle_tracks_active ()
 
 void
 Editor::remove_tracks ()
+{
+       /* this will delete GUI objects that may be the subject of an event
+          handler in which this method is called. Defer actual deletion to the
+          next idle callback, when all event handling is finished.
+       */
+       Glib::signal_idle().connect (sigc::mem_fun (*this, &Editor::idle_remove_tracks));
+}
+
+bool
+Editor::idle_remove_tracks ()
+{
+       _remove_tracks ();
+       return false; /* do not call again */
+}
+
+void
+Editor::_remove_tracks ()
 {
        TrackSelection& ts (selection->tracks);
 
@@ -6567,19 +6821,9 @@ edit your ardour.rc file to set the\n\
                return;
        }
 
-       // XXX should be using gettext plural forms, maybe?
-       if (ntracks > 1) {
-               trackstr = _("tracks");
-       } else {
-               trackstr = _("track");
-       }
-
-       if (nbusses > 1) {
-               busstr = _("busses");
-       } else {
-               busstr = _("bus");
-       }
-
+       trackstr = P_("track", "tracks", ntracks);
+       busstr = P_("bus", "busses", nbusses);
+       
        if (ntracks) {
                if (nbusses) {
                        prompt  = string_compose (_("Do you really want to remove %1 %2 and %3 %4?\n"
@@ -6776,7 +7020,7 @@ Editor::insert_time (
 }
 
 void
-Editor::fit_selected_tracks ()
+Editor::fit_selection ()
 {
         if (!selection->tracks.empty()) {
                 fit_tracks (selection->tracks);
@@ -6842,7 +7086,7 @@ Editor::fit_tracks (TrackViewList & tracks)
        }
 
        undo_visual_stack.push_back (current_visual_state (true));
-       no_save_visual = true;
+       PBD::Unwinder<bool> nsv (no_save_visual, true);
 
        /* build a list of all tracks, including children */
 
@@ -6855,36 +7099,36 @@ Editor::fit_tracks (TrackViewList & tracks)
                }
        }
 
-       bool prev_was_selected = false;
-       bool is_selected = tracks.contains (all.front());
-       bool next_is_selected;
-
-       for (TrackViewList::iterator t = all.begin(); t != all.end(); ++t) {
-
-               TrackViewList::iterator next;
-
-               next = t;
-               ++next;
 
-               if (next != all.end()) {
-                       next_is_selected = tracks.contains (*next);
-               } else {
-                       next_is_selected = false;
+       // find selection range.
+       // if someone knows how to user TrackViewList::iterator for this
+       // I'm all ears.
+       int selected_top = -1;
+       int selected_bottom = -1;
+       int i = 0;
+       for (TrackViewList::iterator t = all.begin(); t != all.end(); ++t, ++i) {
+               if ((*t)->marked_for_display ()) {
+                       if (tracks.contains(*t)) {
+                               if (selected_top == -1) {
+                                       selected_top = i;
+                               }
+                               selected_bottom = i;
+                       }
                }
+       }
 
+       i = 0;
+       for (TrackViewList::iterator t = all.begin(); t != all.end(); ++t, ++i) {
                if ((*t)->marked_for_display ()) {
-                       if (is_selected) {
+                       if (tracks.contains(*t)) {
                                (*t)->set_height (h);
                                first_y_pos = std::min ((*t)->y_position (), first_y_pos);
                        } else {
-                               if (prev_was_selected && next_is_selected) {
+                               if (i > selected_top && i < selected_bottom) {
                                        hide_track_in_display (*t);
                                }
                        }
                }
-
-               prev_was_selected = is_selected;
-               is_selected = next_is_selected;
        }
 
        /*
@@ -6970,7 +7214,7 @@ Editor::toggle_region_mute ()
 
                (*i)->region()->playlist()->clear_changes ();
                (*i)->region()->set_muted (!(*i)->region()->muted ());
-               _session->add_command (new StatefulDiffCommand ((*i)->region()->playlist()));
+               _session->add_command (new StatefulDiffCommand ((*i)->region()));
 
        }