Text/overlay property to hide buffer contents from lisp?

Text/overlay property to hide buffer contents from lisp?

[Tom]

I know there are the `invisible' and `intangible' properties to
hide parts of the buffer from the user, but these hidden regions
are apparently not hidden from lisp commands like
query-replace-regexp.

Is there a property which can hide buffer contents like narrow
does, so that lisp commands can't access it either? 

Re: Text/overlay property to hide buffer contents from lisp?

[Stefan Monnier]

> I know there are the `invisible' and `intangible' properties to
> hide parts of the buffer from the user, but these hidden regions
> are apparently not hidden from lisp commands like
> query-replace-regexp.

> Is there a property which can hide buffer contents like narrow
> does, so that lisp commands can't access it either? 

Other than delete-region, no.


        Stefan

Re: Text/overlay property to hide buffer contents from lisp?

[Tom]

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> 
> > Is there a property which can hide buffer contents like narrow
> > does, so that lisp commands can't access it either? 
> 
> Other than delete-region, no.
> 

It's pity, because it could be useful.

I don't know if emacs maintainers plan to implement this feature someday,
but if they don't they should.

Re: Text/overlay property to hide buffer contents from lisp?

[Andreas Röhler]

Am 10.04.2011 10:49, schrieb Tom:
> I know there are the `invisible' and `intangible' properties to
> hide parts of the buffer from the user, but these hidden regions
> are apparently not hidden from lisp commands like
> query-replace-regexp.
>

If query-replacs goes into `intangible' sounds like a bug for me.

Whilst with `invisible' it seems reasonable. Emacs don't need eyes... :)

Cheers

Andreas

> Is there a property which can hide buffer contents like narrow
> does, so that lisp commands can't access it either?
>
>
>
>

Re: Text/overlay property to hide buffer contents from lisp?

[Perry Smith]

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On Apr 10, 2011, at 11:02 AM, Andreas Röhler wrote:

> Am 10.04.2011 10:49, schrieb Tom:
>> I know there are the `invisible' and `intangible' properties to
>> hide parts of the buffer from the user, but these hidden regions
>> are apparently not hidden from lisp commands like
>> query-replace-regexp.
>> 
> 
> If query-replacs goes into `intangible' sounds like a bug for me.
> 
> Whilst with `invisible' it seems reasonable. Emacs don't need eyes... :)

`intangible' is a new concept to me.  For anyone else trying to follow along, intangible is documented in the Elisp manual (but not in Emacs' Concept Index which is the first place I looked).

One thing it mentions:

>      When the variable `inhibit-point-motion-hooks' is non-`nil', the
>      `intangible' property is ignored.


I assume that is not set but it might be.

From grep'ing the source and looking at what is in the Elisp manual and the comments in the code, I too would expect searches to not enter intangible areas.  The code also mentioned "sticky forward" and "sticky backward" -- not sure what that is (yet) but that might be affecting things too.


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