bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

[Helmut Eller]

1.) It would be nice if the register machinery could also be used for
switching to buffers that aren't connected to a file but have
more-or-less fixed names like *shell*, *Backtrace*, or *scratch*.

E.g. (set-register ?s '(buffer "*scratch*")) could set up things so that
C-x r j s would switch to the *scratch* buffer.

2.) Similarly, it would be useful to have a way to switch to a buffer
based on the buffer's mode.

E.g. (set-register ?l '(mode emacs-lisp)) could switch to the last
recently used buffer in emacs-lisp mode.

I suppose I could implement this myself with registerv-make, but maybe
those two use cases should be standardized and documented.

Helmut

bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

[Lars Ingebrigtsen]

Helmut Eller <eller.helmut@gmail.com> writes:

> 1.) It would be nice if the register machinery could also be used for
> switching to buffers that aren't connected to a file but have
> more-or-less fixed names like *shell*, *Backtrace*, or *scratch*.
>
> E.g. (set-register ?s '(buffer "*scratch*")) could set up things so that
> C-x r j s would switch to the *scratch* buffer.

Can you use registers today to jump to buffers that are connected to
files?  I'm wondering why you're singling out non-file buffers here...

But in general, it seems to me that these keystrokes aren't that much
more efficient than just C-x b scr RET or something.

> 2.) Similarly, it would be useful to have a way to switch to a buffer
> based on the buffer's mode.
>
> E.g. (set-register ?l '(mode emacs-lisp)) could switch to the last
> recently used buffer in emacs-lisp mode.

Hm...  I don't quite see the utility here.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

[Helmut Eller]

On Thu, Jul 11 2019, Lars Ingebrigtsen wrote:

> Helmut Eller <eller.helmut@gmail.com> writes:
>
>> 1.) It would be nice if the register machinery could also be used for
>> switching to buffers that aren't connected to a file but have
>> more-or-less fixed names like *shell*, *Backtrace*, or *scratch*.
>>
>> E.g. (set-register ?s '(buffer "*scratch*")) could set up things so that
>> C-x r j s would switch to the *scratch* buffer.
>
> Can you use registers today to jump to buffers that are connected to
> files?  I'm wondering why you're singling out non-file buffers here...

Yes, I have (set-register ?e '(file . "~/.emacs")) in .emacs.

> But in general, it seems to me that these keystrokes aren't that much
> more efficient than just C-x b scr RET or something.
>
>> 2.) Similarly, it would be useful to have a way to switch to a buffer
>> based on the buffer's mode.
>>
>> E.g. (set-register ?l '(mode emacs-lisp)) could switch to the last
>> recently used buffer in emacs-lisp mode.
>
> Hm...  I don't quite see the utility here.

Well, you can close this bug.

Helmut

bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

[Lars Ingebrigtsen]

Helmut Eller <eller.helmut@gmail.com> writes:

>> Helmut Eller <eller.helmut@gmail.com> writes:
>>
>>> 1.) It would be nice if the register machinery could also be used for
>>> switching to buffers that aren't connected to a file but have
>>> more-or-less fixed names like *shell*, *Backtrace*, or *scratch*.
>>>
>>> E.g. (set-register ?s '(buffer "*scratch*")) could set up things so that
>>> C-x r j s would switch to the *scratch* buffer.
>>
>> Can you use registers today to jump to buffers that are connected to
>> files?  I'm wondering why you're singling out non-file buffers here...
>
> Yes, I have (set-register ?e '(file . "~/.emacs")) in .emacs.

Ah, I see.  Yes, then it makes sense to add a `buffer' form, too, I
think?

Does anybody object to this?  It seems about as useful as the `file'
form...  And looking at the implementation in register.el, it looks
pretty trivial to add.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#33033: 27.0.50; [wishlist] Registers for non-file buffers

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Ah, I see.  Yes, then it makes sense to add a `buffer' form, too, I
> think?
>
> Does anybody object to this?  It seems about as useful as the `file'
> form...  And looking at the implementation in register.el, it looks
> pretty trivial to add.

I've now added this to Emacs 29.

As for the:

> E.g. (set-register ?l '(mode emacs-lisp)) could switch to the last
> recently used buffer in emacs-lisp mode.

I don't think that sounds generally useful enough, so I've not added
that.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no