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Re: Add a function to test for invisible characters?

From: ken manheimer
Subject: Re: Add a function to test for invisible characters?
Date: Mon, 23 Jun 2008 16:21:29 -0400

On Mon, Jun 23, 2008 at 3:34 PM, Lennart Borgman (gmail)
<address@hidden> wrote:
> Lennart Borgman (gmail) wrote:
>> Stefan Monnier wrote:
>>>> I asked some time ago if a function to test if a character is
>>>> invisible. I think nothing has been done to this, or am I mistaken?
>>> It's called `invisible-p'.
>> Ah, thanks, there it is. Very nice.
> I grepped for "'invisible" to see if there were any places where this
> should/could be used. In some cases I do not understand what should be done.
> For example allout.el has
>  (defsubst allout-hidden-p (&optional pos)
>    "Non-nil if the character after point is invisible."
>    (eq (get-char-property (or pos (point)) 'invisible) 'allout))
> However here are a some that I think maybe should use invisible-p or perhaps
> test a little bit more careful:
> [...]

i think you inferred correctly that i deliberately didn't use
invisible-p.  that's because i needed to detect points that are hidden
specifically by allout, not for some other purpose.  i guess i the
docstring should be clearer about that.


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