make Selection::set (TrackViewList*) more efficient and emit less PI::Change signals
[ardour.git] / gtk2_ardour / selection.cc
index da706a34d7a4b344866ebd98cadb1b716616e1b6..ab26bfd48ab484a99e2c1f6cc63ab8aaa90e3a07 100644 (file)
 
 #include <algorithm>
 #include <sigc++/bind.h>
+
 #include "pbd/error.h"
 #include "pbd/stacktrace.h"
 
 #include "ardour/playlist.h"
 #include "ardour/rc_configuration.h"
 
+#include "control_protocol/control_protocol.h"
+
+#include "audio_region_view.h"
+#include "debug.h"
+#include "gui_thread.h"
 #include "midi_cut_buffer.h"
+#include "region_gain_line.h"
 #include "region_view.h"
 #include "selection.h"
 #include "selection_templates.h"
 #include "time_axis_view.h"
 #include "automation_time_axis.h"
 #include "public_editor.h"
+#include "control_point.h"
+#include "vca_time_axis.h"
 
-#include "i18n.h"
+#include "pbd/i18n.h"
 
 using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
 
 struct AudioRangeComparator {
-    bool operator()(AudioRange a, AudioRange b) {
-           return a.start < b.start;
-    }
+       bool operator()(AudioRange a, AudioRange b) {
+               return a.start < b.start;
+       }
 };
 
+Selection::Selection (const PublicEditor* e)
+       : tracks (e)
+       , editor (e)
+       , next_time_id (0)
+{
+       clear ();
+
+       /* we have disambiguate which remove() for the compiler */
+
+       void (Selection::*track_remove)(TimeAxisView*) = &Selection::remove;
+       TimeAxisView::CatchDeletion.connect (*this, MISSING_INVALIDATOR, boost::bind (track_remove, this, _1), gui_context());
+
+       void (Selection::*marker_remove)(ArdourMarker*) = &Selection::remove;
+       ArdourMarker::CatchDeletion.connect (*this, MISSING_INVALIDATOR, boost::bind (marker_remove, this, _1), gui_context());
+
+       void (Selection::*point_remove)(ControlPoint*) = &Selection::remove;
+       ControlPoint::CatchDeletion.connect (*this, MISSING_INVALIDATOR, boost::bind (point_remove, this, _1), gui_context());
+}
+
+#if 0
 Selection&
 Selection::operator= (const Selection& other)
 {
@@ -58,6 +87,7 @@ Selection::operator= (const Selection& other)
        }
        return *this;
 }
+#endif
 
 bool
 operator== (const Selection& a, const Selection& b)
@@ -83,6 +113,42 @@ Selection::clear ()
        clear_playlists ();
        clear_midi_notes ();
        clear_midi_regions ();
+       clear_markers ();
+       pending_midi_note_selection.clear();
+}
+
+void
+Selection::clear_objects (bool with_signal)
+{
+       clear_regions (with_signal);
+       clear_points (with_signal);
+       clear_lines(with_signal);
+       clear_playlists (with_signal);
+       clear_midi_notes (with_signal);
+       clear_midi_regions (with_signal);
+}
+
+void
+Selection::clear_tracks (bool with_signal)
+{
+       if (!tracks.empty()) {
+               PresentationInfo::ChangeSuspender cs;
+
+               for (TrackViewList::iterator x = tracks.begin(); x != tracks.end(); ++x) {
+                       (*x)->set_selected (false);
+               }
+
+               tracks.clear ();
+       }
+}
+
+void
+Selection::clear_time (bool with_signal)
+{
+       time.clear();
+       if (with_signal) {
+               TimeChanged ();
+       }
 }
 
 void
@@ -96,54 +162,56 @@ Selection::dump_region_layers()
 
 
 void
-Selection::clear_regions ()
+Selection::clear_regions (bool with_signal)
 {
        if (!regions.empty()) {
                regions.clear_all ();
-               RegionsChanged();
-       }
-}
-
-void
-Selection::clear_tracks ()
-{
-       if (!tracks.empty()) {
-               tracks.clear ();
-               TracksChanged();
+               if (with_signal) {
+                       RegionsChanged();
+               }
        }
 }
 
 void
-Selection::clear_midi_notes ()
+Selection::clear_midi_notes (bool with_signal)
 {
        if (!midi_notes.empty()) {
                for (MidiNoteSelection::iterator x = midi_notes.begin(); x != midi_notes.end(); ++x) {
                        delete *x;
                }
                midi_notes.clear ();
-               MidiNotesChanged ();
+               if (with_signal) {
+                       MidiNotesChanged ();
+               }
+       }
+
+       // clear note selections for MRV's that have note selections
+       // this will cause the MRV to be removed from the list
+       for (MidiRegionSelection::iterator i = midi_regions.begin();
+            i != midi_regions.end();) {
+               MidiRegionSelection::iterator tmp = i;
+               ++tmp;
+               MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*i);
+               if (mrv) {
+                       mrv->clear_selection();
+               }
+               i = tmp;
        }
 }
 
 void
-Selection::clear_midi_regions ()
+Selection::clear_midi_regions (bool with_signal)
 {
        if (!midi_regions.empty()) {
                midi_regions.clear ();
-               MidiRegionsChanged ();
+               if (with_signal) {
+                       MidiRegionsChanged ();
+               }
        }
 }
 
 void
-Selection::clear_time ()
-{
-       time.clear();
-
-       TimeChanged ();
-}
-
-void
-Selection::clear_playlists ()
+Selection::clear_playlists (bool with_signal)
 {
        /* Selections own their playlists */
 
@@ -155,31 +223,40 @@ Selection::clear_playlists ()
 
        if (!playlists.empty()) {
                playlists.clear ();
-               PlaylistsChanged();
+               if (with_signal) {
+                       PlaylistsChanged();
+               }
        }
 }
 
 void
-Selection::clear_lines ()
+Selection::clear_lines (bool with_signal)
 {
        if (!lines.empty()) {
                lines.clear ();
-               LinesChanged();
+               if (with_signal) {
+                       LinesChanged();
+               }
        }
 }
 
 void
-Selection::clear_markers ()
+Selection::clear_markers (bool with_signal)
 {
        if (!markers.empty()) {
                markers.clear ();
-               MarkersChanged();
+               if (with_signal) {
+                       MarkersChanged();
+               }
        }
 }
 
 void
 Selection::toggle (boost::shared_ptr<Playlist> pl)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        PlaylistSelection::iterator i;
 
        if ((i = find (playlists.begin(), playlists.end(), pl)) == playlists.end()) {
@@ -195,7 +272,12 @@ Selection::toggle (boost::shared_ptr<Playlist> pl)
 void
 Selection::toggle (const TrackViewList& track_list)
 {
+       PresentationInfo::ChangeSuspender cs;
+
        for (TrackViewList::const_iterator i = track_list.begin(); i != track_list.end(); ++i) {
+               if (dynamic_cast<VCATimeAxisView*> (*i)) {
+                       continue;
+               }
                toggle ((*i));
        }
 }
@@ -203,22 +285,28 @@ Selection::toggle (const TrackViewList& track_list)
 void
 Selection::toggle (TimeAxisView* track)
 {
+       if (dynamic_cast<VCATimeAxisView*> (track)) {
+               return;
+       }
+
        TrackSelection::iterator i;
 
        if ((i = find (tracks.begin(), tracks.end(), track)) == tracks.end()) {
-               void (Selection::*pmf)(TimeAxisView*) = &Selection::remove;
-               track->GoingAway.connect (sigc::bind (sigc::mem_fun (*this, pmf), track));
                tracks.push_back (track);
+               track->set_selected (true);
        } else {
                tracks.erase (i);
+               track->set_selected (false);
        }
 
-       TracksChanged();
 }
 
 void
 Selection::toggle (const MidiNoteSelection& midi_note_list)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        for (MidiNoteSelection::const_iterator i = midi_note_list.begin(); i != midi_note_list.end(); ++i) {
                toggle ((*i));
        }
@@ -244,6 +332,9 @@ Selection::toggle (MidiCutBuffer* midi)
 void
 Selection::toggle (RegionView* r)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        RegionSelection::iterator i;
 
        if ((i = find (regions.begin(), regions.end(), r)) == regions.end()) {
@@ -258,6 +349,9 @@ Selection::toggle (RegionView* r)
 void
 Selection::toggle (MidiRegionView* mrv)
 {
+       clear_time();   //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        MidiRegionSelection::iterator i;
 
        if ((i = find (midi_regions.begin(), midi_regions.end(), mrv)) == midi_regions.end()) {
@@ -272,6 +366,9 @@ Selection::toggle (MidiRegionView* mrv)
 void
 Selection::toggle (vector<RegionView*>& r)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        RegionSelection::iterator i;
 
        for (vector<RegionView*>::iterator x = r.begin(); x != r.end(); ++x) {
@@ -286,24 +383,29 @@ Selection::toggle (vector<RegionView*>& r)
 }
 
 long
-Selection::toggle (nframes_t start, nframes_t end)
+Selection::toggle (framepos_t start, framepos_t end)
 {
+       clear_objects();  //enforce object/range exclusivity
+
        AudioRangeComparator cmp;
 
        /* XXX this implementation is incorrect */
 
-       time.push_back (AudioRange (start, end, next_time_id++));
+       time.push_back (AudioRange (start, end, ++next_time_id));
        time.consolidate ();
        time.sort (cmp);
 
        TimeChanged ();
 
-       return next_time_id - 1;
+       return next_time_id;
 }
 
 void
 Selection::add (boost::shared_ptr<Playlist> pl)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        if (find (playlists.begin(), playlists.end(), pl) == playlists.end()) {
                pl->use ();
                playlists.push_back(pl);
@@ -314,6 +416,9 @@ Selection::add (boost::shared_ptr<Playlist> pl)
 void
 Selection::add (const list<boost::shared_ptr<Playlist> >& pllist)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        bool changed = false;
 
        for (list<boost::shared_ptr<Playlist> >::const_iterator i = pllist.begin(); i != pllist.end(); ++i) {
@@ -330,23 +435,31 @@ Selection::add (const list<boost::shared_ptr<Playlist> >& pllist)
 }
 
 void
-Selection::add (const TrackViewList& track_list)
+Selection::add (TrackViewList const & track_list)
 {
-       TrackViewList added = tracks.add (track_list);
+       clear_objects();  //enforce object/range exclusivity
 
-       for (list<TimeAxisView*>::const_iterator i = added.begin(); i != added.end(); ++i) {
-               void (Selection::*pmf)(TimeAxisView*) = &Selection::remove;
-               (*i)->GoingAway.connect (sigc::bind (sigc::mem_fun (*this, pmf), (*i)));
-       }
+       PresentationInfo::ChangeSuspender cs;
+
+       TrackViewList added = tracks.add (track_list);
 
        if (!added.empty()) {
-               TracksChanged ();
+               for (TrackViewList::iterator x = added.begin(); x != added.end(); ++x) {
+                       if (dynamic_cast<VCATimeAxisView*> (*x)) {
+                               continue;
+                       }
+                       (*x)->set_selected (true);
+               }
        }
 }
 
 void
 Selection::add (TimeAxisView* track)
 {
+       if (dynamic_cast<VCATimeAxisView*> (track)) {
+               return;
+       }
+
        TrackViewList tr;
        tr.push_back (track);
        add (tr);
@@ -355,6 +468,9 @@ Selection::add (TimeAxisView* track)
 void
 Selection::add (const MidiNoteSelection& midi_list)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        const MidiNoteSelection::const_iterator b = midi_list.begin();
        const MidiNoteSelection::const_iterator e = midi_list.end();
 
@@ -378,6 +494,9 @@ Selection::add (MidiCutBuffer* midi)
 void
 Selection::add (vector<RegionView*>& v)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        /* XXX This method or the add (const RegionSelection&) needs to go
         */
 
@@ -386,9 +505,6 @@ Selection::add (vector<RegionView*>& v)
        for (vector<RegionView*>::iterator i = v.begin(); i != v.end(); ++i) {
                if (find (regions.begin(), regions.end(), (*i)) == regions.end()) {
                        changed = regions.add ((*i));
-                       if (Config->get_link_region_and_track_selection() && changed) {
-                               add (&(*i)->get_trackview());
-                       }
                }
        }
 
@@ -400,6 +516,9 @@ Selection::add (vector<RegionView*>& v)
 void
 Selection::add (const RegionSelection& rs)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        /* XXX This method or the add (const vector<RegionView*>&) needs to go
         */
 
@@ -408,9 +527,6 @@ Selection::add (const RegionSelection& rs)
        for (RegionSelection::const_iterator i = rs.begin(); i != rs.end(); ++i) {
                if (find (regions.begin(), regions.end(), (*i)) == regions.end()) {
                        changed = regions.add ((*i));
-                       if (Config->get_link_region_and_track_selection() && changed) {
-                               add (&(*i)->get_trackview());
-                       }
                }
        }
 
@@ -422,49 +538,70 @@ Selection::add (const RegionSelection& rs)
 void
 Selection::add (RegionView* r)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        if (find (regions.begin(), regions.end(), r) == regions.end()) {
-               regions.add (r);
-               if (Config->get_link_region_and_track_selection()) {
-                       add (&r->get_trackview());
+               bool changed = regions.add (r);
+               if (changed) {
+                       RegionsChanged ();
                }
-               RegionsChanged ();
        }
 }
 
 void
 Selection::add (MidiRegionView* mrv)
 {
+       DEBUG_TRACE(DEBUG::Selection, string_compose("Selection::add MRV %1\n", mrv));
+
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        if (find (midi_regions.begin(), midi_regions.end(), mrv) == midi_regions.end()) {
                midi_regions.push_back (mrv);
                /* XXX should we do this? */
-#if 0
-               if (Config->get_link_region_and_track_selection()) {
-                       add (&mrv->get_trackview());
-               }
-#endif
                MidiRegionsChanged ();
        }
 }
 
 long
-Selection::add (nframes_t start, nframes_t end)
+Selection::add (framepos_t start, framepos_t end)
 {
+       clear_objects();  //enforce object/range exclusivity
+
        AudioRangeComparator cmp;
 
        /* XXX this implementation is incorrect */
 
-       time.push_back (AudioRange (start, end, next_time_id++));
+       time.push_back (AudioRange (start, end, ++next_time_id));
        time.consolidate ();
        time.sort (cmp);
 
        TimeChanged ();
 
-       return next_time_id - 1;
+       return next_time_id;
+}
+
+void
+Selection::move_time (framecnt_t distance)
+{
+       if (distance == 0) {
+               return;
+       }
+
+       for (list<AudioRange>::iterator i = time.begin(); i != time.end(); ++i) {
+               (*i).start += distance;
+               (*i).end += distance;
+       }
+
+       TimeChanged ();
 }
 
 void
-Selection::replace (uint32_t sid, nframes_t start, nframes_t end)
+Selection::replace (uint32_t sid, framepos_t start, framepos_t end)
 {
+       clear_objects();  //enforce object/range exclusivity
+
        for (list<AudioRange>::iterator i = time.begin(); i != time.end(); ++i) {
                if ((*i).id == sid) {
                        time.erase (i);
@@ -485,17 +622,23 @@ Selection::replace (uint32_t sid, nframes_t start, nframes_t end)
 void
 Selection::add (boost::shared_ptr<Evoral::ControlList> cl)
 {
+       clear_time();  //enforce object/range exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        boost::shared_ptr<ARDOUR::AutomationList> al
                = boost::dynamic_pointer_cast<ARDOUR::AutomationList>(cl);
        if (!al) {
                warning << "Programming error: Selected list is not an ARDOUR::AutomationList" << endmsg;
                return;
-               return;
-       }
-       if (find (lines.begin(), lines.end(), al) == lines.end()) {
-               lines.push_back (al);
-               LinesChanged();
        }
+
+       /* The original may change so we must store a copy (not a pointer) here.
+        * e.g AutomationLine rewrites the list with gain mapping.
+        * the downside is that we can't perfom duplicate checks.
+        * This code was changed in response to #6842
+        */
+       lines.push_back (boost::shared_ptr<ARDOUR::AutomationList> (new ARDOUR::AutomationList(*al)));
+       LinesChanged();
 }
 
 void
@@ -503,27 +646,39 @@ Selection::remove (TimeAxisView* track)
 {
        list<TimeAxisView*>::iterator i;
        if ((i = find (tracks.begin(), tracks.end(), track)) != tracks.end()) {
+               /* erase first, because set_selected() will remove the track
+                  from the selection, invalidating the iterator.
+
+                  In fact, we don't really even need to do the erase, but this is
+                  a hangover of axis view selection being in the GUI.
+               */
                tracks.erase (i);
-               TracksChanged();
+               track->set_selected (false);
        }
 }
 
 void
 Selection::remove (const TrackViewList& track_list)
 {
-       bool changed = false;
+       PresentationInfo::ChangeSuspender cs;
 
        for (TrackViewList::const_iterator i = track_list.begin(); i != track_list.end(); ++i) {
 
                TrackViewList::iterator x = find (tracks.begin(), tracks.end(), *i);
+
                if (x != tracks.end()) {
                        tracks.erase (x);
-                       changed = true;
+                       (*i)->set_selected (false);
                }
        }
+}
 
-       if (changed) {
-               TracksChanged();
+void
+Selection::remove (ControlPoint* p)
+{
+       PointSelection::iterator i = find (points.begin(), points.end(), p);
+       if (i != points.end ()) {
+               points.erase (i);
        }
 }
 
@@ -596,31 +751,21 @@ Selection::remove (RegionView* r)
        if (regions.remove (r)) {
                RegionsChanged ();
        }
-
-       if (Config->get_link_region_and_track_selection() && !regions.involves (r->get_trackview())) {
-               remove (&r->get_trackview());
-       }
 }
 
 void
 Selection::remove (MidiRegionView* mrv)
 {
+       DEBUG_TRACE(DEBUG::Selection, string_compose("Selection::remove MRV %1\n", mrv));
+
        MidiRegionSelection::iterator x;
 
        if ((x = find (midi_regions.begin(), midi_regions.end(), mrv)) != midi_regions.end()) {
                midi_regions.erase (x);
                MidiRegionsChanged ();
        }
-
-#if 0
-       /* XXX fix this up ? */
-       if (Config->get_link_region_and_track_selection() && !regions.involves (r->get_trackview())) {
-               remove (&r->get_trackview());
-       }
-#endif
 }
 
-
 void
 Selection::remove (uint32_t selection_id)
 {
@@ -639,7 +784,7 @@ Selection::remove (uint32_t selection_id)
 }
 
 void
-Selection::remove (nframes_t /*start*/, nframes_t /*end*/)
+Selection::remove (framepos_t /*start*/, framepos_t /*end*/)
 {
 }
 
@@ -656,42 +801,92 @@ Selection::remove (boost::shared_ptr<ARDOUR::AutomationList> ac)
 void
 Selection::set (TimeAxisView* track)
 {
-       clear_tracks ();
+       if (dynamic_cast<VCATimeAxisView*> (track)) {
+               return;
+       }
+       clear_objects ();  //enforce object/range exclusivity
+
+       PresentationInfo::ChangeSuspender cs;
+
+       if (!tracks.empty()) {
+
+               if (tracks.size() == 1 && tracks.front() == track) {
+                       /* already single selection: nothing to do */
+                       return;
+               }
+
+               for (TrackViewList::iterator x = tracks.begin(); x != tracks.end(); ++x) {
+                       (*x)->set_selected (false);
+               }
+
+               tracks.clear ();
+       }
+
        add (track);
 }
 
 void
 Selection::set (const TrackViewList& track_list)
 {
-       clear_tracks ();
-       add (track_list);
+       clear_objects();  //enforce object/range exclusivity
+
+
+       TrackViewList to_be_added;
+       TrackViewList to_be_removed;
+
+       for (TrackViewList::const_iterator x = tracks.begin(); x != tracks.end(); ++x) {
+               if (find (track_list.begin(), track_list.end(), *x) == track_list.end()) {
+                       to_be_removed.push_back (*x);
+               }
+       }
+
+       for (TrackViewList::const_iterator x = track_list.begin(); x != track_list.end(); ++x) {
+               if (dynamic_cast<VCATimeAxisView*> (*x)) {
+                       continue;
+               }
+               if (find (tracks.begin(), tracks.end(), *x) == tracks.end()) {
+                       to_be_added.push_back (*x);
+               }
+       }
+
+       PresentationInfo::ChangeSuspender cs;
+       remove (to_be_removed);
+       add (to_be_added);
+
 }
 
 void
 Selection::set (const MidiNoteSelection& midi_list)
 {
-       clear_midi_notes ();
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects ();
        add (midi_list);
 }
 
 void
 Selection::set (boost::shared_ptr<Playlist> playlist)
 {
-       clear_playlists ();
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects ();
        add (playlist);
 }
 
 void
 Selection::set (const list<boost::shared_ptr<Playlist> >& pllist)
 {
-       clear_playlists ();
+       clear_time();  //enforce region/object exclusivity
+       clear_objects ();
        add (pllist);
 }
 
 void
 Selection::set (const RegionSelection& rs)
 {
-       clear_regions();
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects();
        regions = rs;
        RegionsChanged(); /* EMIT SIGNAL */
 }
@@ -699,29 +894,28 @@ Selection::set (const RegionSelection& rs)
 void
 Selection::set (MidiRegionView* mrv)
 {
-       clear_midi_regions ();
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects ();
        add (mrv);
 }
 
 void
-Selection::set (RegionView* r, bool also_clear_tracks)
+Selection::set (RegionView* r, bool /*also_clear_tracks*/)
 {
-       clear_regions ();
-       if (also_clear_tracks) {
-               clear_tracks ();
-       }
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects ();
        add (r);
 }
 
 void
 Selection::set (vector<RegionView*>& v)
 {
-       clear_regions ();
-       if (Config->get_link_region_and_track_selection()) {
-               clear_tracks ();
-               // make sure to deselect any automation selections
-               clear_points();
-       }
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects();
+
        add (v);
 }
 
@@ -729,14 +923,17 @@ Selection::set (vector<RegionView*>& v)
  *  the list of tracks it applies to.
  */
 long
-Selection::set (nframes_t start, nframes_t end)
+Selection::set (framepos_t start, framepos_t end)
 {
+       clear_objects();  //enforce region/object exclusivity
+       clear_time();
+
        if ((start == 0 && end == 0) || end < start) {
                return 0;
        }
 
        if (time.empty()) {
-               time.push_back (AudioRange (start, end, next_time_id++));
+               time.push_back (AudioRange (start, end, ++next_time_id));
        } else {
                /* reuse the first entry, and remove all the rest */
 
@@ -754,31 +951,70 @@ Selection::set (nframes_t start, nframes_t end)
        return time.front().id;
 }
 
+/** Set the start and end of the range selection.  If more than one range
+ *  is currently selected, the start of the earliest range and the end of the
+ *  latest range are set.  If no range is currently selected, this method
+ *  selects a single range from start to end.
+ *
+ *  @param start New start time.
+ *  @param end New end time.
+ */
+void
+Selection::set_preserving_all_ranges (framepos_t start, framepos_t end)
+{
+       clear_objects();  //enforce region/object exclusivity
+
+       if ((start == 0 && end == 0) || (end < start)) {
+               return;
+       }
+
+       if (time.empty ()) {
+               time.push_back (AudioRange (start, end, ++next_time_id));
+       } else {
+               time.sort (AudioRangeComparator ());
+               time.front().start = start;
+               time.back().end = end;
+       }
+
+       time.consolidate ();
+
+       TimeChanged ();
+}
+
 void
 Selection::set (boost::shared_ptr<Evoral::ControlList> ac)
 {
-       lines.clear();
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects();
+
        add (ac);
 }
 
 bool
-Selection::selected (Marker* m)
+Selection::selected (ArdourMarker* m) const
 {
        return find (markers.begin(), markers.end(), m) != markers.end();
 }
 
 bool
-Selection::selected (TimeAxisView* tv)
+Selection::selected (TimeAxisView* tv) const
 {
-       return find (tracks.begin(), tracks.end(), tv) != tracks.end();
+       return tv->selected ();
 }
 
 bool
-Selection::selected (RegionView* rv)
+Selection::selected (RegionView* rv) const
 {
        return find (regions.begin(), regions.end(), rv) != regions.end();
 }
 
+bool
+Selection::selected (ControlPoint* cp) const
+{
+       return find (points.begin(), points.end(), cp) != points.end();
+}
+
 bool
 Selection::empty (bool internal_selection)
 {
@@ -801,43 +1037,58 @@ Selection::empty (bool internal_selection)
           as a cut buffer.
        */
 
-       return object_level_empty && midi_notes.empty();
+       return object_level_empty && midi_notes.empty() && points.empty();
 }
 
 void
-Selection::toggle (const vector<AutomationSelectable*>& autos)
+Selection::toggle (ControlPoint* cp)
 {
-       for (vector<AutomationSelectable*>::const_iterator x = autos.begin(); x != autos.end(); ++x) {
-               if ((*x)->get_selected()) {
-                       points.remove (**x);
-               } else {
-                       points.push_back (**x);
-               }
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
 
-               delete *x;
+       cp->set_selected (!cp->selected ());
+       PointSelection::iterator i = find (points.begin(), points.end(), cp);
+       if (i == points.end()) {
+               points.push_back (cp);
+       } else {
+               points.erase (i);
        }
 
        PointsChanged (); /* EMIT SIGNAL */
 }
 
 void
-Selection::toggle (list<Selectable*>& selectables)
+Selection::toggle (vector<ControlPoint*> const & cps)
 {
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
+       for (vector<ControlPoint*>::const_iterator i = cps.begin(); i != cps.end(); ++i) {
+               toggle (*i);
+       }
+}
+
+void
+Selection::toggle (list<Selectable*> const & selectables)
+{
+       clear_time();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        RegionView* rv;
-       AutomationSelectable* as;
+       ControlPoint* cp;
        vector<RegionView*> rvs;
-       vector<AutomationSelectable*> autos;
+       vector<ControlPoint*> cps;
 
-       for (std::list<Selectable*>::iterator i = selectables.begin(); i != selectables.end(); ++i) {
+       for (std::list<Selectable*>::const_iterator i = selectables.begin(); i != selectables.end(); ++i) {
                if ((rv = dynamic_cast<RegionView*> (*i)) != 0) {
                        rvs.push_back (rv);
-               } else if ((as = dynamic_cast<AutomationSelectable*> (*i)) != 0) {
-                       autos.push_back (as);
+               } else if ((cp = dynamic_cast<ControlPoint*> (*i)) != 0) {
+                       cps.push_back (cp);
                } else {
                        fatal << _("programming error: ")
                              << X_("unknown selectable type passed to Selection::toggle()")
                              << endmsg;
-                       /*NOTREACHED*/
+                       abort(); /*NOTREACHED*/
                }
        }
 
@@ -845,38 +1096,53 @@ Selection::toggle (list<Selectable*>& selectables)
                toggle (rvs);
        }
 
-       if (!autos.empty()) {
-               toggle (autos);
+       if (!cps.empty()) {
+               toggle (cps);
        }
 }
 
 void
-Selection::set (list<Selectable*>& selectables)
+Selection::set (list<Selectable*> const & selectables)
 {
-       clear_regions();
-       clear_points ();
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       clear_objects ();
+
        add (selectables);
 }
 
+void
+Selection::add (PointSelection const & s)
+{
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
+       for (PointSelection::const_iterator i = s.begin(); i != s.end(); ++i) {
+               points.push_back (*i);
+       }
+}
 
 void
-Selection::add (list<Selectable*>& selectables)
+Selection::add (list<Selectable*> const & selectables)
 {
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        RegionView* rv;
-       AutomationSelectable* as;
+       ControlPoint* cp;
        vector<RegionView*> rvs;
-       vector<AutomationSelectable*> autos;
+       vector<ControlPoint*> cps;
 
-       for (std::list<Selectable*>::iterator i = selectables.begin(); i != selectables.end(); ++i) {
+       for (std::list<Selectable*>::const_iterator i = selectables.begin(); i != selectables.end(); ++i) {
                if ((rv = dynamic_cast<RegionView*> (*i)) != 0) {
                        rvs.push_back (rv);
-               } else if ((as = dynamic_cast<AutomationSelectable*> (*i)) != 0) {
-                       autos.push_back (as);
+               } else if ((cp = dynamic_cast<ControlPoint*> (*i)) != 0) {
+                       cps.push_back (cp);
                } else {
                        fatal << _("programming error: ")
                              << X_("unknown selectable type passed to Selection::add()")
                              << endmsg;
-                       /*NOTREACHED*/
+                       abort(); /*NOTREACHED*/
                }
        }
 
@@ -884,39 +1150,76 @@ Selection::add (list<Selectable*>& selectables)
                add (rvs);
        }
 
-       if (!autos.empty()) {
-               add (autos);
+       if (!cps.empty()) {
+               add (cps);
        }
 }
 
 void
-Selection::clear_points ()
+Selection::clear_points (bool with_signal)
 {
        if (!points.empty()) {
                points.clear ();
-               PointsChanged ();
+               if (with_signal) {
+                       PointsChanged ();
+               }
+       }
+}
+
+void
+Selection::add (ControlPoint* cp)
+{
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
+       cp->set_selected (true);
+       points.push_back (cp);
+       PointsChanged (); /* EMIT SIGNAL */
+}
+
+void
+Selection::add (vector<ControlPoint*> const & cps)
+{
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
+       for (vector<ControlPoint*>::const_iterator i = cps.begin(); i != cps.end(); ++i) {
+               (*i)->set_selected (true);
+               points.push_back (*i);
        }
+       PointsChanged (); /* EMIT SIGNAL */
 }
 
 void
-Selection::add (vector<AutomationSelectable*>& autos)
+Selection::set (ControlPoint* cp)
 {
-       for (vector<AutomationSelectable*>::iterator i = autos.begin(); i != autos.end(); ++i) {
-               points.push_back (**i);
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
+       if (cp->selected () && points.size () == 1) {
+               return;
+       }
+
+       for (uint32_t i = 0; i < cp->line().npoints(); ++i) {
+               cp->line().nth (i)->set_selected (false);
        }
 
-       PointsChanged ();
+       clear_objects ();
+       add (cp);
 }
 
 void
-Selection::set (Marker* m)
+Selection::set (ArdourMarker* m)
 {
-       clear_markers ();
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+       markers.clear ();
+
        add (m);
 }
 
 void
-Selection::toggle (Marker* m)
+Selection::toggle (ArdourMarker* m)
 {
        MarkerSelection::iterator i;
 
@@ -928,7 +1231,7 @@ Selection::toggle (Marker* m)
 }
 
 void
-Selection::remove (Marker* m)
+Selection::remove (ArdourMarker* m)
 {
        MarkerSelection::iterator i;
 
@@ -939,32 +1242,34 @@ Selection::remove (Marker* m)
 }
 
 void
-Selection::add (Marker* m)
+Selection::add (ArdourMarker* m)
 {
-       if (find (markers.begin(), markers.end(), m) == markers.end()) {
-
-               /* disambiguate which remove() for the compiler */
-
-               void (Selection::*pmf)(Marker*) = &Selection::remove;
-
-               m->GoingAway.connect (sigc::bind (sigc::mem_fun (*this, pmf), m));
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
 
+       if (find (markers.begin(), markers.end(), m) == markers.end()) {
                markers.push_back (m);
                MarkersChanged();
        }
 }
 
 void
-Selection::add (const list<Marker*>& m)
+Selection::add (const list<ArdourMarker*>& m)
 {
+       clear_time ();  //enforce region/object exclusivity
+       clear_tracks();  //enforce object/track exclusivity
+
        markers.insert (markers.end(), m.begin(), m.end());
+       markers.sort ();
+       markers.unique ();
+
        MarkersChanged ();
 }
 
 void
-MarkerSelection::range (nframes64_t& s, nframes64_t& e)
+MarkerSelection::range (framepos_t& s, framepos_t& e)
 {
-       s = max_frames;
+       s = max_framepos;
        e = 0;
 
        for (MarkerSelection::iterator i = begin(); i != end(); ++i) {
@@ -981,3 +1286,314 @@ MarkerSelection::range (nframes64_t& s, nframes64_t& e)
        s = std::min (s, e);
        e = std::max (s, e);
 }
+
+XMLNode&
+Selection::get_state () const
+{
+       /* XXX: not complete; just sufficient to get track selection state
+          so that re-opening plugin windows for editor mixer strips works
+       */
+
+       char buf[32];
+       XMLNode* node = new XMLNode (X_("Selection"));
+
+       for (TrackSelection::const_iterator i = tracks.begin(); i != tracks.end(); ++i) {
+               RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (*i);
+               AutomationTimeAxisView* atv = dynamic_cast<AutomationTimeAxisView*> (*i);
+               if (rtv) {
+                       XMLNode* t = node->add_child (X_("RouteView"));
+                       t->add_property (X_("id"), atoi (rtv->route()->id().to_s().c_str()));
+               } else if (atv) {
+                       XMLNode* t = node->add_child (X_("AutomationView"));
+                       t->add_property (X_("id"), atoi (atv->parent_route()->id().to_s().c_str()));
+                       t->add_property (X_("parameter"), EventTypeMap::instance().to_symbol (atv->parameter ()));
+               }
+       }
+
+       for (RegionSelection::const_iterator i = regions.begin(); i != regions.end(); ++i) {
+               XMLNode* r = node->add_child (X_("Region"));
+               r->add_property (X_("id"), atoi ((*i)->region ()->id ().to_s ().c_str()));
+       }
+
+       /* midi region views have thir own internal selection. */
+       list<pair<PBD::ID, std::set<boost::shared_ptr<Evoral::Note<Evoral::Beats> > > > > rid_notes;
+       editor->get_per_region_note_selection (rid_notes);
+
+       list<pair<PBD::ID, std::set<boost::shared_ptr<Evoral::Note<Evoral::Beats> > > > >::iterator rn_it;
+       for (rn_it = rid_notes.begin(); rn_it != rid_notes.end(); ++rn_it) {
+               XMLNode* n = node->add_child (X_("MIDINotes"));
+               n->add_property (X_("region-id"), atoi((*rn_it).first.to_s().c_str()));
+
+               for (std::set<boost::shared_ptr<Evoral::Note<Evoral::Beats> > >::iterator i = (*rn_it).second.begin(); i != (*rn_it).second.end(); ++i) {
+                       XMLNode* nc = n->add_child(X_("note"));
+
+                       snprintf(buf, sizeof(buf), "%d", (*i)->id());
+                       nc->add_property (X_("note-id"), string(buf));
+               }
+       }
+
+       for (PointSelection::const_iterator i = points.begin(); i != points.end(); ++i) {
+               AutomationTimeAxisView* atv = dynamic_cast<AutomationTimeAxisView*> (&(*i)->line().trackview);
+               if (atv) {
+
+                       XMLNode* r = node->add_child (X_("ControlPoint"));
+                       r->add_property (X_("type"), "track");
+                       r->add_property (X_("route-id"), atoi (atv->parent_route()->id ().to_s ().c_str()));
+                       r->add_property (X_("automation-list-id"), atoi ((*i)->line().the_list()->id ().to_s ().c_str()));
+                       r->add_property (X_("parameter"), EventTypeMap::instance().to_symbol ((*i)->line().the_list()->parameter ()));
+
+                       snprintf(buf, sizeof(buf), "%d", (*i)->view_index());
+                       r->add_property (X_("view-index"), string(buf));
+                       continue;
+               }
+
+               AudioRegionGainLine* argl = dynamic_cast<AudioRegionGainLine*> (&(*i)->line());
+               if (argl) {
+                       XMLNode* r = node->add_child (X_("ControlPoint"));
+                       r->add_property (X_("type"), "region");
+                       r->add_property (X_("region-id"), atoi (argl->region_view ().region ()->id ().to_s ().c_str()));
+                       snprintf(buf, sizeof(buf), "%d", (*i)->view_index());
+                       r->add_property (X_("view-index"), string(buf));
+               }
+
+       }
+
+       for (TimeSelection::const_iterator i = time.begin(); i != time.end(); ++i) {
+               XMLNode* t = node->add_child (X_("AudioRange"));
+               snprintf(buf, sizeof(buf), "%" PRId64, (*i).start);
+               t->add_property (X_("start"), string(buf));
+               snprintf(buf, sizeof(buf), "%" PRId64, (*i).end);
+               t->add_property (X_("end"), string(buf));
+       }
+
+       for (MarkerSelection::const_iterator i = markers.begin(); i != markers.end(); ++i) {
+               XMLNode* t = node->add_child (X_("Marker"));
+
+               bool is_start;
+               Location* loc = editor->find_location_from_marker (*i, is_start);
+
+               t->add_property (X_("id"), atoi (loc->id().to_s().c_str()));
+               t->add_property (X_("start"), is_start ? X_("yes") : X_("no"));
+       }
+
+       return *node;
+}
+
+int
+Selection::set_state (XMLNode const & node, int)
+{
+       if (node.name() != X_("Selection")) {
+               return -1;
+       }
+
+       clear_regions ();
+       clear_midi_notes ();
+       clear_points ();
+       clear_time ();
+       clear_tracks ();
+       clear_markers ();
+
+       XMLNodeList children = node.children ();
+       for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
+               if ((*i)->name() == X_("RouteView")) {
+
+                       XMLProperty const * prop_id = (*i)->property (X_("id"));
+                       assert (prop_id);
+                       PBD::ID id (prop_id->value ());
+                       RouteTimeAxisView* rtv = editor->get_route_view_by_route_id (id);
+                       if (rtv) {
+                               add (rtv);
+                       }
+
+               } else if ((*i)->name() == X_("Region")) {
+                       XMLProperty const * prop_id = (*i)->property (X_("id"));
+                       assert (prop_id);
+                       PBD::ID id (prop_id->value ());
+
+                       RegionSelection rs;
+                       editor->get_regionviews_by_id (id, rs);
+
+                       if (!rs.empty ()) {
+                               add (rs);
+                       } else {
+                               /*
+                                 regionviews haven't been constructed - stash the region IDs
+                                 so we can identify them in Editor::region_view_added ()
+                               */
+                               regions.pending.push_back (id);
+                       }
+
+               } else if ((*i)->name() == X_("MIDINotes")) {
+                       XMLProperty const * prop_region_id = (*i)->property (X_("region-id"));
+
+                       assert (prop_region_id);
+
+                       PBD::ID const id (prop_region_id->value ());
+                       RegionSelection rs;
+
+                       editor->get_regionviews_by_id (id, rs); // there could be more than one
+
+                       std::list<Evoral::event_id_t> notes;
+                       XMLNodeList children = (*i)->children ();
+
+                       for (XMLNodeList::const_iterator ci = children.begin(); ci != children.end(); ++ci) {
+                               XMLProperty const * prop_id = (*ci)->property (X_("note-id"));
+                               if (prop_id) {
+                                       Evoral::event_id_t id = atoi(prop_id->value());
+                                       notes.push_back (id);
+                               }
+                       }
+
+                       for (RegionSelection::iterator rsi = rs.begin(); rsi != rs.end(); ++rsi) {
+                               MidiRegionView* mrv = dynamic_cast<MidiRegionView*> (*rsi);
+                               if (mrv) {
+                                       mrv->select_notes(notes);
+                               }
+                       }
+
+                       if (rs.empty()) {
+                               /* regionviews containing these notes don't yet exist on the canvas.*/
+                               pending_midi_note_selection.push_back (make_pair (id, notes));
+                       }
+
+               } else if  ((*i)->name() == X_("ControlPoint")) {
+                       XMLProperty const * prop_type = (*i)->property (X_("type"));
+
+                       assert(prop_type);
+
+                       if (prop_type->value () == "track") {
+
+                               XMLProperty const * prop_route_id = (*i)->property (X_("route-id"));
+                               XMLProperty const * prop_alist_id = (*i)->property (X_("automation-list-id"));
+                               XMLProperty const * prop_parameter = (*i)->property (X_("parameter"));
+                               XMLProperty const * prop_view_index = (*i)->property (X_("view-index"));
+
+                               assert (prop_route_id);
+                               assert (prop_alist_id);
+                               assert (prop_parameter);
+                               assert (prop_view_index);
+
+                               PBD::ID route_id (prop_route_id->value ());
+                               RouteTimeAxisView* rtv = editor->get_route_view_by_route_id (route_id);
+                               vector <ControlPoint *> cps;
+
+                               if (rtv) {
+                                       boost::shared_ptr<AutomationTimeAxisView> atv = rtv->automation_child (EventTypeMap::instance().from_symbol (prop_parameter->value ()));
+                                       if (atv) {
+                                               list<boost::shared_ptr<AutomationLine> > lines = atv->lines();
+                                               for (list<boost::shared_ptr<AutomationLine> > ::iterator li = lines.begin(); li != lines.end(); ++li) {
+                                                       if ((*li)->the_list()->id() == prop_alist_id->value()) {
+                                                               ControlPoint* cp = (*li)->nth(atol(prop_view_index->value().c_str()));
+                                                               if (cp) {
+                                                                       cps.push_back (cp);
+                                                                       cp->show();
+                                                               }
+                                                       }
+                                               }
+                                       }
+                               }
+                               if (!cps.empty()) {
+                                       add (cps);
+                               }
+                       } else if (prop_type->value () == "region") {
+                               XMLProperty const * prop_region_id = (*i)->property (X_("region-id"));
+                               XMLProperty const * prop_view_index = (*i)->property (X_("view-index"));
+
+                               if (!prop_region_id || !prop_view_index) {
+                                       continue;
+                               }
+
+                               PBD::ID region_id (prop_region_id->value ());
+                               RegionSelection rs;
+                               editor->get_regionviews_by_id (region_id, rs);
+
+                               if (!rs.empty ()) {
+                                       vector <ControlPoint *> cps;
+                                       for (RegionSelection::iterator rsi = rs.begin(); rsi != rs.end(); ++rsi) {
+                                               AudioRegionView* arv = dynamic_cast<AudioRegionView*> (*rsi);
+                                               if (arv) {
+                                                       boost::shared_ptr<AudioRegionGainLine> gl = arv->get_gain_line ();
+                                                       ControlPoint* cp = gl->nth(atol(prop_view_index->value().c_str()));
+                                                       if (cp) {
+                                                               cps.push_back (cp);
+                                                               cp->show();
+                                                       }
+                                               }
+                                       }
+                                       if (!cps.empty()) {
+                                               add (cps);
+                                       }
+                               }
+                       }
+
+               } else if  ((*i)->name() == X_("AudioRange")) {
+                       XMLProperty const * prop_start = (*i)->property (X_("start"));
+                       XMLProperty const * prop_end = (*i)->property (X_("end"));
+
+                       assert (prop_start);
+                       assert (prop_end);
+
+                       framepos_t s (atol (prop_start->value ().c_str()));
+                       framepos_t e (atol (prop_end->value ().c_str()));
+
+                       set_preserving_all_ranges (s, e);
+
+               } else if ((*i)->name() == X_("AutomationView")) {
+
+                       XMLProperty const * prop_id = (*i)->property (X_("id"));
+                       XMLProperty const * prop_parameter = (*i)->property (X_("parameter"));
+
+                       assert (prop_id);
+                       assert (prop_parameter);
+
+                       PBD::ID id (prop_id->value ());
+                       RouteTimeAxisView* rtv = editor->get_route_view_by_route_id (id);
+
+                       if (rtv) {
+                               boost::shared_ptr<AutomationTimeAxisView> atv = rtv->automation_child (EventTypeMap::instance().from_symbol (prop_parameter->value ()));
+
+                               /* the automation could be for an entity that was never saved
+                                  in the session file. Don't freak out if we can't find
+                                  it.
+                               */
+
+                               if (atv) {
+                                       add (atv.get());
+                               }
+                       }
+
+               } else if ((*i)->name() == X_("Marker")) {
+
+                       XMLProperty const * prop_id = (*i)->property (X_("id"));
+                       XMLProperty const * prop_start = (*i)->property (X_("start"));
+                       assert (prop_id);
+                       assert (prop_start);
+
+                       PBD::ID id (prop_id->value ());
+                       ArdourMarker* m = editor->find_marker_from_location_id (id, string_is_affirmative (prop_start->value ()));
+                       if (m) {
+                               add (m);
+                       }
+
+               }
+
+       }
+
+       return 0;
+}
+
+void
+Selection::remove_regions (TimeAxisView* t)
+{
+       RegionSelection::iterator i = regions.begin();
+       while (i != regions.end ()) {
+               RegionSelection::iterator tmp = i;
+               ++tmp;
+
+               if (&(*i)->get_time_axis_view() == t) {
+                       remove (*i);
+               }
+
+               i = tmp;
+       }
+}