Dynamic Playlist Simulating Entire Collection in Playlist

[Alejandro Wainzinger]

A user named Raylz in #amarok earlier was mentioning a use case that I
think he currently really would have to dump the entire collection
into the playlist to do.  It is as follows:

The user wants to:
- start listening to a song selected from the Collection Browser
- see the songs contiguous to this song in the playlist (where
contiguous = alphabetically next to)
- be able to simply select and play a contiguous song for play

Currently, the only way I can see to have this happen is to have the
entire collection dumped into the playlist, and to look nearby on it.

Possible solution:

Have something similar to a dynamic playlist which loads the initial
song the user chooses from the CB, and have the populate action use
the criteria that it should pull in all albums of nearby artists
(nearby meaning before alphabetically, and after, and a configurable
number of artists away as a range).  This way, we limit the number of
things in the playlist to being far from the entire collection, while
effectively simulating the experience of playing through your entire
collection alphabetically, and allowing you to repopulate by choosing
another song, after which again nearby artists will be fetched and
shown.

I apologize if there is already a way to do this, and would like to
know of it if so.  And if it is already possible, this might be a nice
built-in type of dynamic playlist or biased playlist for users.  Also,
I posted to the ML because Raylz has not yet, and it seemed a neat
idea I didn't want to forget.