//========================================================================================
// Methods
//========================================================================================
/// <summary>
/// Asynchronously searches for the lyrics of the given song.
/// </summary>
/// <param name="song">An ISong specifying both the artist and title of the song.</param>
public void RetrieveLyrics(ISong song)
{
// song could be null if we called this method just when switching tracks
// yes a very small window but nonetheless..
if (!isConnected || (song == null))
{
return;
}
int hash = song.GetHashCode();
lock (engine)
{
if (!queue.ContainsKey(hash))
{
var worker = new BackgroundWorker();
worker.DoWork += RetrieveLyrics;
worker.RunWorkerCompleted += LyricsRetrieved;
worker.WorkerSupportsCancellation = true;
queue.Add(song.GetHashCode(), worker);
worker.RunWorkerAsync(song);
}
}
}
private void DoLyricsProgressReport(ISong song, int stage)
{
if (!Dispatcher.CheckAccess())
{
Dispatcher.BeginInvoke((Action) delegate
{
DoLyricsProgressReport(song, stage);
});
return;
}
ITrack track = controller.CurrentTrack;
if (track?.GetHashCode() == song.GetHashCode())
{
if ((stage >= 0) && (stage <= 5))
{
taskPanel.LyricsState = stage.ToString();
}
else
{
taskPanel.LyricsState = string.Empty;
}
}
}
/// <summary>
/// BackgroundWorker RunWorkerCompleted method.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void LyricsRetrieved(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
{
return;
}
if (e.Error != null)
{
// when the Preferences dialog is open, iTunes does not response to COM interops
return;
}
ISong song = e.Result as ISong;
if (song == null)
{
return;
}
var hash = song.GetHashCode();
lock (engine)
{
// when iTunes forces a shutdown of iTuner, Dispose might have
// run immediately prior to this lock, so we need to check for null
if (queue != null)
{
if (queue.ContainsKey(hash))
{
queue.Remove(hash);
}
}
}
// signal regardless of whether lyrics is empty so we can update the UI
LyricsUpdated?.Invoke(song as Track);
}
//========================================================================================
// Methods
//========================================================================================
/// <summary>
/// Asynchronously searches for the lyrics of the given song.
/// </summary>
/// <param name="song">An ISong specifying both the artist and title of the song.</param>
public void RetrieveLyrics(ISong song)
{
// song could be null if we called this method just when switching tracks
// yes a very small window but nonetheless..
if (!isConnected || (song == null))
{
return;
}
int hash = song.GetHashCode();
lock (engine)
{
if (!queue.ContainsKey(hash))
{
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(RetrieveLyrics);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(LyricsRetrieved);
worker.WorkerSupportsCancellation = true;
queue.Add(song.GetHashCode(), worker);
worker.RunWorkerAsync(song);
}
}
}
