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#ifndef __ardour_gtk_region_selection_h__
#define __ardour_gtk_region_selection_h__

#include <set>
#include <list>
#include <sigc++/signal_system.h>
#include <ardour/types.h>

using std::list;
using std::set;

class AudioRegionView;

struct AudioRegionComparator {
    bool operator() (const AudioRegionView* a, const AudioRegionView* b) const;

class AudioRegionSelection : public set<AudioRegionView*, AudioRegionComparator>, public SigC::Object
      AudioRegionSelection (const AudioRegionSelection&);

      AudioRegionSelection& operator= (const AudioRegionSelection&);

      void add (AudioRegionView*, bool dosort = true);
      bool remove (AudioRegionView*);
      bool contains (AudioRegionView*);

      void clear_all();
      jack_nframes_t start () const {
            return _current_start;

      /* collides with list<>::end */

      jack_nframes_t end_frame () const { 
            return _current_end;

      const list<AudioRegionView *> & by_layer() const { return _bylayer; }
      void  by_position (list<AudioRegionView*>&) const;
      void remove_it (AudioRegionView*);

      void add_to_layer (AudioRegionView *);
      jack_nframes_t _current_start;
      jack_nframes_t _current_end;

      list<AudioRegionView *> _bylayer;

#endif /* __ardour_gtk_region_selection_h__ */

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