nnoo.el: how to update server variables

nnoo.el: how to update server variables

[Nikolaus Rath]

Hello,

I am trying to update a server variable from one of (Gnus') backend
functions. My first attempt was

(defvoo nnimap-my-state nil)
(deffoo nnimap-request-list (&optional server)
  (nnoo-change-server 'nnimap server nil)
  (message "Old state: %s" nnimap-my-state)
  (setq nnimap-my-state 42))

but that did not work (successive invocations would all run with
nnimap-my-state being nil). After studying the nnoo.el sources for a
bit, I concluded that nnoo-change-server updates the declared server
variables to the per-server values, but does not copy any changes back.

However, I wasn't able to figure out how to manually perform these
changes. Can someone point me in the right direction?

Best,
-Nikolaus

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Re: nnoo.el: how to update server variables

[Lars Ingebrigtsen]

Nikolaus Rath <Nikolaus@rath.org> writes:

> I am trying to update a server variable from one of (Gnus') backend
> functions. My first attempt was
>
> (defvoo nnimap-my-state nil)
> (deffoo nnimap-request-list (&optional server)
>   (nnoo-change-server 'nnimap server nil)
>   (message "Old state: %s" nnimap-my-state)
>   (setq nnimap-my-state 42))
>
> but that did not work (successive invocations would all run with
> nnimap-my-state being nil). After studying the nnoo.el sources for a
> bit, I concluded that nnoo-change-server updates the declared server
> variables to the per-server values, but does not copy any changes back.

I don't think that's correct.  When you change the server, nnoo will
stash all the values of all the "defvoo" values, and will copy them back
again when you change back to the original server.

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

Re: nnoo.el: how to update server variables

[Nikolaus Rath]

On Dec 24 2015, Lars Ingebrigtsen <larsi@gnus.org> wrote:
> Nikolaus Rath <Nikolaus@rath.org> writes:
>
>> I am trying to update a server variable from one of (Gnus') backend
>> functions. My first attempt was
>>
>> (defvoo nnimap-my-state nil)
>> (deffoo nnimap-request-list (&optional server)
>>   (nnoo-change-server 'nnimap server nil)
>>   (message "Old state: %s" nnimap-my-state)
>>   (setq nnimap-my-state 42))
>>
>> but that did not work (successive invocations would all run with
>> nnimap-my-state being nil). After studying the nnoo.el sources for a
>> bit, I concluded that nnoo-change-server updates the declared server
>> variables to the per-server values, but does not copy any changes back.
>
> I don't think that's correct.  When you change the server, nnoo will
> stash all the values of all the "defvoo" values, and will copy them back
> again when you change back to the original server.

Ok, so why doesn't the above work then?

Best,
-Nikolaus

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Re: nnoo.el: how to update server variables

[Lars Ingebrigtsen]

Nikolaus Rath <Nikolaus@rath.org> writes:

> Ok, so why doesn't the above work then?

I don't know.  Have you tried edebugging `nnoo-push-server to see
what happens to your variable?

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