File indexing completed on 2024-05-19 04:49:29

 /****************************************************************************************
  * Copyright (c) 2009 Maximilian Kossick <maximilian.kossick@googlemail.com>            *
  *                                                                                      *
  * This program is free software; you can redistribute it and/or modify it under        *
  * the terms of the GNU General Public License as published by the Free Software        *
  * Foundation; either version 2 of the License, or (at your option) any later           *
  * version.                                                                             *
  *                                                                                      *
  * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
  * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
  *                                                                                      *
  * You should have received a copy of the GNU General Public License along with         *
  * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
  ****************************************************************************************/
 
 #include "core/meta/Meta.h"
 #include "core/playlists/Playlist.h"
 #include "core/playlists/PlaylistProvider.h"
 
 using namespace Playlists;
 
 PlaylistObserver::PlaylistObserver()
     : m_playlistSubscriptionsMutex( QMutex::Recursive )  // prevent deadlocks
 {
 }
 
 PlaylistObserver::~PlaylistObserver()
 {
     QMutexLocker locker( &m_playlistSubscriptionsMutex );
     foreach( PlaylistPtr playlist, m_playlistSubscriptions )
     {
         playlist->unsubscribe( this );
     }
 }
 
 void
 PlaylistObserver::subscribeTo( PlaylistPtr playlist )
 {
     if( playlist )
     {
         QMutexLocker locker( &m_playlistSubscriptionsMutex );
         m_playlistSubscriptions.insert( playlist );
         playlist->subscribe( this );
     }
 }
 
 void
 PlaylistObserver::unsubscribeFrom( PlaylistPtr playlist )
 {
     if( playlist )
     {
         QMutexLocker locker( &m_playlistSubscriptionsMutex );
         m_playlistSubscriptions.remove( playlist );
         playlist->unsubscribe( this );
     }
 }
 
 void PlaylistObserver::metadataChanged( const PlaylistPtr &)
 {
 }
 
 void PlaylistObserver::trackAdded( const PlaylistPtr&, const Meta::TrackPtr&, int )
 {
 }
 
 void PlaylistObserver::trackRemoved( const PlaylistPtr&, int )
 {
 }
 
 void PlaylistObserver::tracksLoaded( PlaylistPtr )
 {
 }
 
 Playlist::Playlist()
     : m_observersMutex( QMutex::Recursive ) // prevent deadlocks
     , m_async( true )
 {
 }
 
 Playlist::~Playlist()
 {
 }
 
 void
 Playlist::setName( const QString & )
 {
 }
 
 void
 Playlist::triggerTrackLoad()
 {
     notifyObserversTracksLoaded();
 }
 
 void Playlist::addTrack( const Meta::TrackPtr&, int )
 {
 }
 
 void Playlist::removeTrack( int )
 {
 }
 
 void
 Playlist::syncTrackStatus( int, const Meta::TrackPtr &)
 {
 }
 
 QStringList
 Playlist::groups()
 {
     return QStringList();
 }
 
 void
 Playlist::setGroups( const QStringList & )
 {
 }
 
 void
 Playlist::notifyObserversMetadataChanged()
 {
     QMutexLocker locker( &m_observersMutex );
     foreach( PlaylistObserver *observer, m_observers )
     {
         if( m_observers.contains( observer ) ) // guard against observers removing themselves in destructors
             observer->metadataChanged( PlaylistPtr( this ) );
     }
 }
 
 void
 Playlist::notifyObserversTracksLoaded()
 {
     QMutexLocker locker( &m_observersMutex );
     foreach( PlaylistObserver *observer, m_observers )
     {
         if( m_observers.contains( observer ) ) // guard against observers removing themselves in destructors
             observer->tracksLoaded( PlaylistPtr( this ) );
     }
 }
 
 void
 Playlist::notifyObserversTrackAdded( const Meta::TrackPtr &track, int position )
 {
     Q_ASSERT( position >= 0 ); // notice bug 293295 early
     QMutexLocker locker( &m_observersMutex );
     foreach( PlaylistObserver *observer, m_observers )
     {
         if( m_observers.contains( observer ) ) // guard against observers removing themselves in destructors
             observer->trackAdded( PlaylistPtr( this ), track, position );
     }
 }
 
 void
 Playlist::notifyObserversTrackRemoved( int position )
 {
     QMutexLocker locker( &m_observersMutex );
     foreach( PlaylistObserver *observer, m_observers )
     {
         if( m_observers.contains( observer ) ) // guard against observers removing themselves in destructors
             observer->trackRemoved( PlaylistPtr( this ), position );
     }
 }
 
 void
 Playlist::subscribe( PlaylistObserver* observer )
 {
     if( observer )
     {
         QMutexLocker locker( &m_observersMutex );
         m_observers.insert( observer );
     }
 }
 
 void
 Playlist::unsubscribe( PlaylistObserver* observer )
 {
     QMutexLocker locker( &m_observersMutex );
     m_observers.remove( observer );
 }