Clipboard.cpp

Go to the documentation of this file.

/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Clipboard.cpp
 
*//*******************************************************************/
 
#include "Clipboard.h"
#include "BasicUI.h"
#include "Track.h"
 
Clipboard::Clipboard()
: mTracks { TrackList::Create( nullptr ) }
{
}
 
Clipboard::~Clipboard() = default;
 
void Clipboard::Swap( Clipboard &other )
{
   std::swap( mTracks, other.mTracks );
   std::swap( mProject, other.mProject );
   std::swap( mT0, other.mT0 );
   std::swap( mT1, other.mT1 );
}
 
Clipboard &Clipboard::Get()
{
   static Clipboard instance;
   return instance;
}
 
//static
const TrackList &Clipboard::GetTracks() const
{
   return *mTracks;
}
 
void Clipboard::Clear()
{
   mT0 = 0.0;
   mT1 = 0.0;
   mProject.reset();
   mTracks->Clear();
 
   if (this == &Get())
      // Delayed message at idle time
      // Don't need to capture a weak pointer to the global object
      BasicUI::CallAfter([this]{ Publish({}); });
}
 
void Clipboard::Assign( TrackList && newContents,
   double t0, double t1, const std::weak_ptr<AudacityProject> &pProject )
{
   assert(!newContents.GetOwner());
   newContents.Swap( *mTracks );
   newContents.Clear();
   
   mT0 = t0;
   mT1 = t1;
   mProject = pProject;
 
   if (this == &Get())
      // Delayed message at idle time
      // Don't need to capture a weak pointer to the global object
      BasicUI::CallAfter([this]{ Publish({}); });
}
 
Clipboard::Scope::Scope()
{
   Get().Swap(mTempClipboard);
}
 
Clipboard::Scope::~Scope()
{
   Get().Swap(mTempClipboard);
}