Implement setupMain()

[cyfung1031]

• Implement setupMain()
• Fix getSongInfoNodes()

close #22

@cvzi

[cvzi]

It doesn't work for me. It doesn't register a song change reliably.
One problem seems to be that in getYoutubeMainVideo() the src attribute is not set, when the first media event fires, removing [src] from the selector makes it better, but it's still unreliable.

[cyfung1031]

OK. Reason is found. I have updated the PR code change.

1. Song Info DOM is updated after video is changed.

So this is why song change detection is unreliable.

setTimeout / mutationObserver can help. I chose mutationObserver to ensure the change must be captured.

You can confirm the song detection is working through checking the console log.

console.log('debug: Youtube Music Genius Lyrics - Song Info', songInfoNodes, nodeString)

2. Media element is updated even after Song Info DOM is changed

Now I detect the activeMedia that found in the media events. I have checked that this is the case that src is not set.

So the PR code has been changed such that the detection would not check the src if activeElement is presented.

You can confirm the video element detection is working through checking the console log.

console.log('debug: Youtube Music Genius Lyrics - getYoutubeMainVideo()', video)

However, lyrics is not changing.

From the console logging, the song change detection (song info + video element) is successful.

There are some other reasons that the song lyrics process could not start.

@cvzi Could you please check ?

[cvzi]

Thanks for you work!!
I think this line is the problem: const musicIsPlaying = video && !video.paused
video.paused is still true here. Probably it could be fixed with a delay, but I don't think this line is necessary. It prevents the lyrics from showing, when a song is in the queue but the song is paused. I probably copied it from Spotify script, it can happen on Spotify if you pause the music and then open a new Spotify tab. I don't think it can happen on Youtube Music though, because a new tab starts playing even if it was paused in another tab.