On 2018-05-30, M Kelly wrote:
> > Another way would be to check the fold regions.
> 
> Any pointer/info/tip on how to determine the non-fold region is empty ?

I think this will do it.

    if foldclosedend(1) == line("$")
        " Entire buffer is a closed fold
    endif

See

    :help foldclosedend()

Regards,
Gary

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