Re: how do I know that the buffer is narrowed

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> (<(-(point-max)(point-min))(buffer-size))
> Pfeh!  Is there any good reason to obfuscate the beautiful:
>     (not (and (= (point-min) 1)
>               (= (point-max) (1+ (buffer-size)))))

Yes, there is a very good one: you unnecessarily assume that the buffer
starts at position 1.

Comparing (- (point-max) (point-min)) and (buffer-size) doesn't suffer from
this problem.  And conceptually, it also makes a lot of sense:
(- (point-max) (point-min)) is the amount of text shown and (buffer-size) is
the total mount of text, and the definition of non-narrowed is basically
"shows everything" i.e. "doesn't show less than the total".


        Stefan