Disable ribbon button at specific folder level in document library

I have the following folder structure in my document library:

Library
  |----- Folder 1
  |         |----- Sub-folder 1
  |
  |----- Folder 2
            |----- Sub-folder 2

I have a requirement in which when user is at library level, some of the ribbon buttons are disabled but not at folder 1 level (where user is looking at sub-folder 1 or sub-folder 2).

I understand that it can be done via javascript or C# but the examples I found don't really meet my requirement.

How can I go about doing this?