Narrow: How to hide a specific part?

Narrow: How to hide a specific part?

[Marius Hofert]

Hi,

I recently discovered narrowing (C-x n n). Say I have three
consecutive paragraphs...

A
B
C

... and I want to hide the 'middle' one, that is, B, while keeping A
and C visible. Can this be done with narrowing? (or in any similar
way?). As far as I know, with narrowing, I can only narrow down to A
or C but can't make them both visible simultaneously.

Cheers,

Marius

Re: Narrow: How to hide a specific part?

[daniel]

You could create an overlay in the B area and make it invisible, I think...
I did that one time.

But most emacs function, like search, will continue to see the hidden part.


2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>

> Hi,
>
> I recently discovered narrowing (C-x n n). Say I have three
> consecutive paragraphs...
>
> A
> B
> C
>
> ... and I want to hide the 'middle' one, that is, B, while keeping A
> and C visible. Can this be done with narrowing? (or in any similar
> way?). As far as I know, with narrowing, I can only narrow down to A
> or C but can't make them both visible simultaneously.
>
> Cheers,
>
> Marius
>
>

Re: Narrow: How to hide a specific part?

[Marius Hofert]

Hi Daniel,

Thanks for your quick reply.

You mean selecting B? But how do you make it invisible? AFAIK,
narrowing only makes regions visible, not invisible (?)

Cheers,

Marius

On Mon, Jun 10, 2013 at 2:59 PM, daniel <idnael@gmail.com> wrote:
> You could create an overlay in the B area and make it invisible, I think...
> I did that one time.
>
> But most emacs function, like search, will continue to see the hidden part.
>
>
> 2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>
>>
>> Hi,
>>
>> I recently discovered narrowing (C-x n n). Say I have three
>> consecutive paragraphs...
>>
>> A
>> B
>> C
>>
>> ... and I want to hide the 'middle' one, that is, B, while keeping A
>> and C visible. Can this be done with narrowing? (or in any similar
>> way?). As far as I know, with narrowing, I can only narrow down to A
>> or C but can't make them both visible simultaneously.
>>
>> Cheers,
>>
>> Marius
>>
>

Re: Narrow: How to hide a specific part?

[daniel]

hi! that was an elisp programming answear, not an user answear!

But you can load this elisp and then use functions hide-region and
unhide-region


(defun hide-region ()
  (interactive)
  (setq ov (make-overlay (region-beginning) (region-end)))
  (overlay-put ov 'invisible t)
  (overlay-put ov 'my-overlay t)
  )

(defun unhide-region ()
  (interactive)
  (loop for ov in (overlays-in (region-beginning) (region-end))
if (overlay-get ov 'my-overlay)
 do (delete-overlay ov)
)
  )



2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>

> Hi Daniel,
>
> Thanks for your quick reply.
>
> You mean selecting B? But how do you make it invisible? AFAIK,
> narrowing only makes regions visible, not invisible (?)
>
> Cheers,
>
> Marius
>
> On Mon, Jun 10, 2013 at 2:59 PM, daniel <idnael@gmail.com> wrote:
> > You could create an overlay in the B area and make it invisible, I
> think...
> > I did that one time.
> >
> > But most emacs function, like search, will continue to see the hidden
> part.
> >
> >
> > 2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>
> >>
> >> Hi,
> >>
> >> I recently discovered narrowing (C-x n n). Say I have three
> >> consecutive paragraphs...
> >>
> >> A
> >> B
> >> C
> >>
> >> ... and I want to hide the 'middle' one, that is, B, while keeping A
> >> and C visible. Can this be done with narrowing? (or in any similar
> >> way?). As far as I know, with narrowing, I can only narrow down to A
> >> or C but can't make them both visible simultaneously.
> >>
> >> Cheers,
> >>
> >> Marius
> >>
> >
>

Re: Narrow: How to hide a specific part?

[Bastien]

daniel <idnael@gmail.com> writes:

> hi! that was an elisp programming answear, not an user answear!

Mhh... deserves a new entry for the Urban Dictionary:

Answear: like an answer, but with the promise that it is true.

  "- Did you cheat on me?
   - What do you think?
   - Don't espace, answear me!"

      -- Harold Pinter, The Lover

(No offense Daniel, of course!)

:)

-- 
 Bastien

Re: Narrow: How to hide a specific part?

[Marius Hofert]

Hi,

hide-region works, unhide-region does not (no matter whether I first
select the 'hidden region' or not)

Cheers,

Marius

On Mon, Jun 10, 2013 at 3:48 PM, Bastien <bzg@altern.org> wrote:
> daniel <idnael@gmail.com> writes:
>
>> hi! that was an elisp programming answear, not an user answear!
>
> Mhh... deserves a new entry for the Urban Dictionary:
>
> Answear: like an answer, but with the promise that it is true.
>
>   "- Did you cheat on me?
>    - What do you think?
>    - Don't espace, answear me!"
>
>       -- Harold Pinter, The Lover
>
> (No offense Daniel, of course!)
>
> :)
>
> --
>  Bastien

Re: Narrow: How to hide a specific part?

[daniel]

2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>

> Hi,
>
> hide-region works, unhide-region does not (no matter whether I first
> select the 'hidden region' or not)



unhide-region should make visible all the areas that are inside the current
region

Or try this:

(defun unhide-all ()
  (interactive)
  (loop for ov in (overlays-in (point-min) (point-max))
if (overlay-get ov 'my-overlay)
 do (delete-overlay ov)
)
  )

Re: Narrow: How to hide a specific part?

[Marius Hofert]

Okay, thanks a lot!

Cheers,

Marius

On Mon, Jun 10, 2013 at 5:04 PM, daniel <idnael@gmail.com> wrote:
> 2013/6/10 Marius Hofert <marius.hofert@math.ethz.ch>
>>
>> Hi,
>>
>> hide-region works, unhide-region does not (no matter whether I first
>> select the 'hidden region' or not)
>
>
>
> unhide-region should make visible all the areas that are inside the current
> region
>
> Or try this:
>
> (defun unhide-all ()
>   (interactive)
>   (loop for ov in (overlays-in (point-min) (point-max))
> if (overlay-get ov 'my-overlay)
> do (delete-overlay ov)
> )
>   )
>