Clean up some sourceplaylistinterface logic to hopefully prevent it

saying that a track couldn't be resolved when it gets resolved right
afterwards.

Also, have the latch mode changing (for instance on pause) affect the
source's icon.

src/libtomahawk/audio/audioengine.cpp

@@ -74,6 +74,8 @@ AudioEngine::AudioEngine()
 
     connect( m_audioOutput, SIGNAL( volumeChanged( qreal ) ), SLOT( onVolumeChanged( qreal ) ) );
 
+    connect( this, SIGNAL( sendWaitingNotification() ), SLOT( sendWaitingNotificationSlot() ), Qt::QueuedConnection );
+    
     onVolumeChanged( m_audioOutput->volume() );
 
 #ifndef Q_WS_X11
@@ -178,9 +180,7 @@ AudioEngine::stop()
     map[ Tomahawk::InfoSystem::InfoNowStopped ] = QVariant();
 
     if ( m_waitingOnNewTrack )
-    {
+        emit sendWaitingNotification();
-        sendWaitingNotification();
-    }
     else if ( TomahawkSettings::instance()->verboseNotifications() )
     {
         QVariantMap stopInfo;
@@ -310,8 +310,13 @@ AudioEngine::mute()
 
 
 void
-AudioEngine::sendWaitingNotification() const
+AudioEngine::sendWaitingNotificationSlot() const
 {
+    tDebug( LOGVERBOSE ) << Q_FUNC_INFO;
+    //since it's async, after this is triggered our result could come in, so don't show the popup in that case
+    if ( !m_playlist.isNull() && m_playlist->hasNextItem() )
+        return;
+    
     QVariantMap retryInfo;
     retryInfo["message"] = QString( "The current track could not be resolved. Tomahawk will pick back up with the next resolvable track from this source." );
     Tomahawk::InfoSystem::InfoSystem::instance()->pushInfo(
@@ -538,7 +543,7 @@ AudioEngine::playItem( Tomahawk::playlistinterface_ptr playlist, const Tomahawk:
     {
         m_waitingOnNewTrack = true;
         if ( isStopped() )
-            sendWaitingNotification();
+            emit sendWaitingNotification();
         else
             stop();
     }

src/libtomahawk/audio/audioengine.h

@@ -112,6 +112,8 @@ signals:
 
     void error( AudioEngine::AudioErrorCode errorCode );
 
+    void sendWaitingNotification();
+
 private slots:
     bool loadTrack( const Tomahawk::result_ptr& result );
     void loadPreviousTrack();
@@ -126,13 +128,14 @@ private slots:
     void onNowPlayingInfoReady();
     void onPlaylistNextTrackReady();
 
+    void sendWaitingNotificationSlot() const;
+
 private:
     void setState( AudioState state );
 
     bool isHttpResult( const QString& ) const;
     bool isLocalResult( const QString& ) const;
 
-    void sendWaitingNotification() const;
     void sendNowPlayingNotification();
 
     QSharedPointer<QIODevice> m_input;

src/libtomahawk/playlistinterface.h

@@ -89,6 +89,7 @@ signals:
     void shuffleModeChanged( bool enabled );
     void trackCountChanged( unsigned int tracks );
     void sourceTrackCountChanged( unsigned int tracks );
+    void latchModeChanged( Tomahawk::PlaylistInterface::LatchMode mode );
     void nextTrackReady();
 
 protected:

src/libtomahawk/sourceplaylistinterface.cpp

@@ -61,15 +61,15 @@ Tomahawk::result_ptr
 SourcePlaylistInterface::nextItem()
 {
     tDebug( LOGEXTRA ) << Q_FUNC_INFO;
-    if ( m_source.isNull() || m_source.data()->currentTrack().isNull() || m_source.data()->currentTrack()->results().isEmpty() )
+    if ( !sourceValid() )
     {
-        tDebug( LOGEXTRA ) << Q_FUNC_INFO << " Results were empty for current track or source no longer valid";
+        tDebug( LOGEXTRA ) << Q_FUNC_INFO << " Source no longer valid";
         m_currentItem = Tomahawk::result_ptr();
         return m_currentItem;
     }
-    else if ( !m_gotNextItem )
+    else if ( !hasNextItem() )
     {
-        tDebug( LOGEXTRA ) << Q_FUNC_INFO << " This song was already fetched";
+        tDebug( LOGEXTRA ) << Q_FUNC_INFO << " This song was already fetched or the source isn't playing anything";
         return Tomahawk::result_ptr();
     }
 
@@ -87,10 +87,20 @@ SourcePlaylistInterface::currentItem() const
 
 
 bool
-SourcePlaylistInterface::hasNextItem()
+SourcePlaylistInterface::sourceValid()
 {
     tDebug( LOGEXTRA ) << Q_FUNC_INFO;
-    if ( m_source.isNull() || m_source.data()->currentTrack().isNull() || m_source.data()->currentTrack()->results().isEmpty() )
+    if ( m_source.isNull() || m_source.data()->currentTrack().isNull() )
+        return false;
+
+    return true;
+}
+
+
+bool
+SourcePlaylistInterface::hasNextItem()
+{
+    if ( !sourceValid() )
         return false;
     
     return m_gotNextItem;
@@ -115,10 +125,10 @@ SourcePlaylistInterface::source() const
 void
 SourcePlaylistInterface::reset()
 {
-    if ( !m_currentItem.isNull() )
+    if ( m_currentItem.isNull() )
-        m_gotNextItem = true;
-    else
         m_gotNextItem = false;
+    else
+        m_gotNextItem = true;
 }
 
 
@@ -128,7 +138,7 @@ SourcePlaylistInterface::onSourcePlaybackStarted( const Tomahawk::query_ptr& que
     tDebug( LOGEXTRA ) << Q_FUNC_INFO;
     connect( query.data(), SIGNAL( resolvingFinished( bool ) ), SLOT( resolvingFinished( bool ) ) );
     Pipeline::instance()->resolve( query, true );
-    m_gotNextItem = true;
+    m_gotNextItem = false;
 }
 
 
@@ -137,5 +147,8 @@ SourcePlaylistInterface::resolvingFinished( bool hasResults )
 {
     tDebug( LOGEXTRA ) << Q_FUNC_INFO << " and has results? : " << (hasResults ? "true" : "false");
     if ( hasResults )
+    {
+        m_gotNextItem = true;
         emit nextTrackReady();
+    }
 }

src/libtomahawk/sourceplaylistinterface.h

@@ -44,6 +44,7 @@ public:
     virtual int unfilteredTrackCount() const { return 1; }
 
     virtual Tomahawk::result_ptr siblingItem( int itemsAway );
+    virtual bool sourceValid();
     virtual bool hasNextItem();
     virtual Tomahawk::result_ptr nextItem();
     virtual Tomahawk::result_ptr currentItem() const;
@@ -54,6 +55,8 @@ public:
     virtual PlaylistInterface::RetryMode retryMode() const { return Retry; }
     virtual quint32 retryInterval() const { return 5000; }
 
+    virtual void setLatchMode( PlaylistInterface::LatchMode latchMode ) { m_latchMode = latchMode; emit latchModeChanged( latchMode ); }
+    
     virtual bool shuffled() const { return false; }
     virtual void setFilter( const QString& /*pattern*/ ) {}
 

src/sourcetree/items/sourceitem.cpp

@@ -209,6 +209,7 @@ SourceItem::latchedOff( const source_ptr& from, const source_ptr& to )
     if ( from->isLocal() && ( m_source == to || m_source == from ) )
     {
         m_latchedOn = false;
+        disconnect( m_latchedOnTo->playlistInterface().data(), SIGNAL( latchModeChanged( Tomahawk::PlaylistInterface::LatchMode ) ) );
         m_latchedOnTo.clear();
         emit updated();
     }
@@ -222,11 +223,19 @@ SourceItem::latchedOn( const source_ptr& from, const source_ptr& to )
     {
         m_latchedOn = true;
         m_latchedOnTo = to;
+        connect( m_latchedOnTo->playlistInterface().data(), SIGNAL( latchModeChanged( Tomahawk::PlaylistInterface::LatchMode ) ), SLOT( latchModeChanged( Tomahawk::PlaylistInterface::LatchMode ) ) );
         emit updated();
     }
 }
 
 
+void
+SourceItem::latchModeChanged( Tomahawk::PlaylistInterface::LatchMode mode )
+{
+    Q_UNUSED( mode );
+    emit updated();
+}
+
 
 void
 SourceItem::playlistsAddedInternal( SourceTreeItem* parent, const QList< dynplaylist_ptr >& playlists )

src/sourcetree/items/sourceitem.h

@@ -64,6 +64,7 @@ private slots:
 
     void latchedOn( const Tomahawk::source_ptr&, const Tomahawk::source_ptr& );
     void latchedOff( const Tomahawk::source_ptr&, const Tomahawk::source_ptr& );
+    void latchModeChanged( Tomahawk::PlaylistInterface::LatchMode mode );
 
     void requestExpanding();
 

src/tomahawkapp.cpp

@@ -422,10 +422,12 @@ TomahawkApp::registerMetaTypes()
     qRegisterMetaType< Tomahawk::InfoSystem::InfoType >( "Tomahawk::InfoSystem::InfoType" );
     qRegisterMetaType< Tomahawk::InfoSystem::InfoRequestData >( "Tomahawk::InfoSystem::InfoRequestData" );
     qRegisterMetaType< Tomahawk::InfoSystem::InfoSystemCache* >( "Tomahawk::InfoSystem::InfoSystemCache*" );
-
     qRegisterMetaType< QList< Tomahawk::InfoSystem::InfoStringHash > >("QList< Tomahawk::InfoSystem::InfoStringHash > ");
+    
     qRegisterMetaTypeStreamOperators< QList< Tomahawk::InfoSystem::InfoStringHash > >("QList< Tomahawk::InfoSystem::InfoStringHash > ");
     qRegisterMetaType< QPersistentModelIndex >( "QPersistentModelIndex" );
+
+    qRegisterMetaType< Tomahawk::PlaylistInterface::LatchMode >( "Tomahawk::PlaylistInterface::LatchMode" );
 }