Clipboard.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Clipboard.h
 
  Paul Licameli
 
**********************************************************************/
 
#ifndef __AUDACITY_CLIPBOARD__
#define __AUDACITY_CLIPBOARD__
 
 
 
#include <memory>
 
#include "Observer.h"
 
class AudacityProject;
class TrackList;
 
struct ClipboardChangeMessage {};
 
class AUDACITY_DLL_API Clipboard final
   : public Observer::Publisher<ClipboardChangeMessage>
{
public:
   static Clipboard &Get();
 
   const TrackList &GetTracks() const;
 
   double T0() const { return mT0; }
   double T1() const { return mT1; }
   double Duration() const { return mT1 - mT0; }
 
   const std::weak_ptr<AudacityProject> &Project() const { return mProject; }
 
   void Clear();
   
   void Assign(
     TrackList && newContents, double t0, double t1,
     const std::weak_ptr<AudacityProject> &pProject );
 
   ~Clipboard();
 
   void Swap( Clipboard &other );
 
   struct AUDACITY_DLL_API Scope;
 
private:
   Clipboard();
   Clipboard(const Clipboard &) = delete;
   Clipboard &operator=(const Clipboard &) = delete;
 
   std::shared_ptr<TrackList> mTracks;
   std::weak_ptr<AudacityProject> mProject{};
   double mT0{ 0 };
   double mT1{ 0 };
};
 
struct Clipboard::Scope {
   Scope();
   ~Scope();
private:
   Clipboard mTempClipboard;
};
 
#endif