List of Users Who Have Access to File

Plugin and Widget API Questions
1

I am creating a plugin that I want to allow someone to select from a drop-down to select someone to assign something. In order to make this work, I need a list of people who have access to the file. Is there a way, in a plugin, to get a list of users or people with view/edit access for a particular file? I can get active users, but that would only show folks who are online and actively in the file at the time.

Thanks.

2

No, the plugin API does not provide such info.

3

I figured, but I was hopeful since there is a current user and active user.