Narrowing

Narrowing

[Dr. F.C.Caner]

Hello everyone,

I have a file where I have several routines. Recently I wanted to
split the Emacs window into two parts by C-x 2, and tried to
narrow-to-region where region was one of the routines in one window,
and another one in the other window.

However, I did not succeed in narrowing to two different parts of the
same file in the two different windows.

Any idea as to how this can be done?

Thanks in advance,

FCC

Re: Narrowing

[Johan Bockgård]

ferhun_caner@yahoo.com (Dr. F.C.Caner) writes:

> However, I did not succeed in narrowing to two different parts of the
> same file in the two different windows.
>
> Any idea as to how this can be done?

Investigate `make-indirect-buffer'.

Re: Narrowing

[Greg Hill]

At 2:08 PM +0200 4/3/03, Johan Bockgård wrote:
>ferhun_caner@yahoo.com (Dr. F.C.Caner) writes:
>
>>  However, I did not succeed in narrowing to two different parts of the
>>  same file in the two different windows.
>>
>>  Any idea as to how this can be done?
>
>Investigate `make-indirect-buffer'.

Didn't know about that.  Nice function.  Just added this to my
.emacs, with a convenient key binding.

(defun narrow-to-region-other-window (start end)
   "Make an indirect buffer for current buffer in \"other\" window.
Select it, and narrow it to the current region."
   (interactive "r")
   (switch-to-buffer-other-window
    (make-indirect-buffer
       (current-buffer)
       (concat (buffer-name) "<ind>")
       t ) )
   (if mark-active (narrow-to-region start end)) )

--Greg

Re: Narrowing

[Stefan Monnier]

>>>>> "Greg" == Greg Hill <ghill@synergymicro.com> writes:
> (defun narrow-to-region-other-window (start end)
>    "Make an indirect buffer for current buffer in \"other\" window.
> Select it, and narrow it to the current region."
>    (interactive "r")
>    (switch-to-buffer-other-window
>     (make-indirect-buffer
>        (current-buffer)
>        (concat (buffer-name) "<ind>")
>        t ) )
>    (if mark-active (narrow-to-region start end)) )

Check out clone-indirect-buffer.


        Stefan

Re: Narrowing

[Greg Hill]

At 5:05 PM -0500 4/3/03, Stefan Monnier wrote:
>Check out clone-indirect-buffer.

Thanks.  Now it's:

(defun narrow-to-region-other-window (start end)
   "Make an indirect buffer for current buffer in \"other\" window.
Select it, and narrow it to the current region."
   (interactive "r")
   (clone-indirect-buffer-other-window (current-buffer))
   (if mark-active (narrow-to-region start end)) )

The clone-... functions (I see there's four of them) oughta be in the 
Reference Manual, but they're not.  One of these days I'll have to 
take a closer look at simple.el and see what else I've missed.

--Greg

Re: Narrowing

[Stefan Monnier]

> The clone-... functions (I see there's four of them) oughta be in the
> Reference Manual, but they're not.  One of these days I'll have to take
> a closer look at simple.el and see what else I've missed.

It's in C-h N which is always a good thing to read.


        Stefan

Re: Narrowing

[Johan Bockgård]

"Stefan Monnier" <monnier+gnu.emacs.help/news/@flint.cs.yale.edu> writes:

>> The clone-... functions (I see there's four of them) oughta be in the
>> Reference Manual, but they're not.  One of these days I'll have to take
>> a closer look at simple.el and see what else I've missed.
>
> It's in C-h N which is always a good thing to read.

I see it is in the Emacs manual, too:

(info "(emacs)Indirect Buffers")