Custom action button rights but for other list?

Question

Have list A that is accessible to all participants, and some work flow that produce items on second list B.

All run manually via button on Ribbon on display form on list A.

I would like to disable that button based on user permissions from list B.

Rights mask is just for current list (my list A)? What other options do I have (any without VS?) ?

Answer 1

Custom Action declaration have EnabledScript property, where any valid JS function can be placed, it can check any conditions and should return true or false.

So VisualStudion is needed or direct access to sharepoint filesystem so one can modify proper ribbon xml declarations.