The "Add to playlist" dialog will show checkmark behind a playlist if the song is already part of that playlist.
This feature will only be shown if the playlist dialog is opened and only one song is selected.

By adding a breakpoint the time needed for checking the playlists for the song can be accessed.

Add Upstream Commits

Merge Updates from kabouzeid/master.

At the end of the playlist name a checkmark is displayed if all songs are in the playlist. If only some of the songs are in the playlist, the checkmark is in brackets.

When adding songs to a playlist duplicates will be filtered out.

Changed and added functions in PlaylistUtil to improve the efficiency of the AddToPlaylistDialog. It will only be checked once which song is in which playlist. This information is also used to make sure no songs will be added twice to the same playlist (instead of checking again).

Fixed issue #4.

doPlaylistContainsAllSongs returned true if the playlist was empty. That's a wrong result, hence fixed with this commit.

First Prototype:
Working check box menu.
Only two state-check-boxes (All or nothing)

Removed "Add Playlist" from the checkbox area and transformed it into a button.

The cancel button is removed as it takes up a lot of space and is not strictly necessary. (The same action can be performed by tapping next to the dialog.)