rework snap

[ardour.git] / libs / ardour / midi_playlist.cc

diff --git a/libs/ardour/midi_playlist.cc b/libs/ardour/midi_playlist.cc
index 67764d66aeefa5880d5c1a6f6ccd6c7336ba1925..20c1c7711146c281bf716357faf1ee68ba5b443d 100644 (file)
--- a/libs/ardour/midi_playlist.cc
+++ b/libs/ardour/midi_playlist.cc
@@ -33,7 +33,9 @@
 #include "ardour/midi_region.h"
 #include "ardour/midi_source.h"
 #include "ardour/midi_state_tracker.h"
+#include "ardour/region_factory.h"
 #include "ardour/session.h"
+#include "ardour/tempo.h"
 #include "ardour/types.h"
 
 #include "pbd/i18n.h"
@@ -381,6 +383,80 @@ MidiPlaylist::destroy_region (boost::shared_ptr<Region> region)
 
        return changed;
 }
+void
+MidiPlaylist::_split_region (boost::shared_ptr<Region> region, MusicFrame playlist_position)
+{
+       if (!region->covers (playlist_position.frame)) {
+               return;
+       }
+
+       if (region->position() == playlist_position.frame ||
+           region->last_frame() == playlist_position.frame) {
+               return;
+       }
+
+       boost::shared_ptr<const MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(region);
+
+       if (mr == 0) {
+               return;
+       }
+
+       boost::shared_ptr<Region> left;
+       boost::shared_ptr<Region> right;
+
+       string before_name;
+       string after_name;
+       const double before_qn = _session.tempo_map().exact_qn_at_frame (playlist_position.frame, playlist_position.division) - region->quarter_note();
+       const double after_qn = mr->length_beats() - before_qn;
+       MusicFrame before (playlist_position.frame - region->position(), playlist_position.division);
+       MusicFrame after (region->length() - before.frame, playlist_position.division);
+
+       /* split doesn't change anything about length, so don't try to splice */
+       bool old_sp = _splicing;
+       _splicing = true;
+
+       RegionFactory::region_name (before_name, region->name(), false);
+
+       {
+               PropertyList plist;
+
+               plist.add (Properties::length, before.frame);
+               plist.add (Properties::length_beats, before_qn);
+               plist.add (Properties::name, before_name);
+               plist.add (Properties::left_of_split, true);
+               plist.add (Properties::layering_index, region->layering_index ());
+               plist.add (Properties::layer, region->layer ());
+
+               /* note: we must use the version of ::create with an offset here,
+                  since it supplies that offset to the Region constructor, which
+                  is necessary to get audio region gain envelopes right.
+               */
+               left = RegionFactory::create (region, MusicFrame (0, 0), plist, true);
+       }
+
+       RegionFactory::region_name (after_name, region->name(), false);
+
+       {
+               PropertyList plist;
+
+               plist.add (Properties::length, after.frame);
+               plist.add (Properties::length_beats, after_qn);
+               plist.add (Properties::name, after_name);
+               plist.add (Properties::right_of_split, true);
+               plist.add (Properties::layering_index, region->layering_index ());
+               plist.add (Properties::layer, region->layer ());
+
+               /* same note as above */
+               right = RegionFactory::create (region, before, plist, true);
+       }
+
+       add_region_internal (left, region->position(), 0, region->quarter_note(), true);
+       add_region_internal (right, region->position() + before.frame, before.division, region->quarter_note() + before_qn, true);
+
+       remove_region_internal (region);
+
+       _splicing = old_sp;
+}
 
 set<Evoral::Parameter>
 MidiPlaylist::contained_automation()