bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Rasmus]

Hi,

I think focus-out-hook doesn't work as expected when used with other
emacsclient that belong to the same daemon.  Of course I could be
misunderstanding the meaning of "input focus" cf. the docstring.

Try the following.  Start a new emacsclient.  Let's call its first GTK
frame 'A' (informally).  Do

1. Make (new-frame).  Let's call this frame 'B' (informally).
2. Make a new buffer in B and eval:
   (set (make-local-variable (quote focus-out-hook)) (quote delete-frame))
3. Switch focus to frame A.  I do so by clicking on A or using
   Super/M-TAB.  Notice that nothing happens
4. Now try this with another program that's not an emacsclient.  The
   Frame is closed as expected.

The real use case for this is an org-agenda desktop file that I use to
integrate the Org calendar with the system calendar button.

Thanks,
Ramus

GNU Emacs 25.0.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.8) of 2015-02-06 on x200s

-- 
When in doubt, do it!

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Monnier]

> I think focus-out-hook doesn't work as expected when used with other
> emacsclient that belong to the same daemon.  Of course I could be
> misunderstanding the meaning of "input focus" cf. the docstring.

`focus-out-hook' is run when focus moved away from Emacs (at least,
that's the intention).

If you want a hook run when switching between frames, then I think
you'll need to catch the `switch-frame' event (yes, this sucks: one is
a hook, the other is an event), which is normally handled by
handle-switch-frame via a binding in the global-map.

So IIUC I think that what you're seeing is not a bug.  But I'm not sure IUC.


        Stefan

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Rasmus]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> I think focus-out-hook doesn't work as expected when used with other
>> emacsclient that belong to the same daemon.  Of course I could be
>> misunderstanding the meaning of "input focus" cf. the docstring.
>
> `focus-out-hook' is run when focus moved away from Emacs (at least,
> that's the intention).
>
> If you want a hook run when switching between frames, then I think
> you'll need to catch the `switch-frame' event (yes, this sucks: one is
> a hook, the other is an event), which is normally handled by
> handle-switch-frame via a binding in the global-map.
>
> So IIUC I think that what you're seeing is not a bug.  But I'm not sure IUC.

Okay.  That's a shame...

—Rasmus

-- 
You people at the NSA are becoming my new best friends!

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Kangas]

Rasmus <rasmus@gmx.us> writes:

> Stefan Monnier <monnier@iro.umontreal.ca> writes:
>
>>> I think focus-out-hook doesn't work as expected when used with other
>>> emacsclient that belong to the same daemon.  Of course I could be
>>> misunderstanding the meaning of "input focus" cf. the docstring.
>>
>> `focus-out-hook' is run when focus moved away from Emacs (at least,
>> that's the intention).
>>
>> If you want a hook run when switching between frames, then I think
>> you'll need to catch the `switch-frame' event (yes, this sucks: one is
>> a hook, the other is an event), which is normally handled by
>> handle-switch-frame via a binding in the global-map.
>>
>> So IIUC I think that what you're seeing is not a bug.  But I'm not sure IUC.
>
> Okay.  That's a shame...

Does anyone else have an opinion here?  If I don't hear anything else
within a couple of weeks, I'll assume Stefan Monnier is correct, and
close this as notabug.

Best regards,
Stefan Kangas

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Monnier]

> Does anyone else have an opinion here?  If I don't hear anything else
> within a couple of weeks, I'll assume Stefan Monnier is correct, and
> close this as notabug.

You could turn it into a feature request, of course.


        Stefan

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Kangas]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Does anyone else have an opinion here?  If I don't hear anything else
>> within a couple of weeks, I'll assume Stefan Monnier is correct, and
>> close this as notabug.
>
> You could turn it into a feature request, of course.

Thanks.  If I understand correctly, the feature request is then to add
a new hook to be run when switching frames.

Best regards,
Stefan Kangas

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Monnier]

> Thanks.  If I understand correctly, the feature request is then to add
> a new hook to be run when switching frames.

I guess so, yes.  But please clarify exactly what you mean by "switching
frame".  E.g. consider the difference between
- changing focus from the window manager
- selecting another frame with `select-frame`.
- hitting M-x in a minibuffer-free frame (which lends you in the
  minibuffer of another frame, e.g. in a minibuffer-only frame).


        Stefan

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Kangas]

retitle 20097 Add new hook to be run when switching frames
thanks

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Thanks.  If I understand correctly, the feature request is then to add
>> a new hook to be run when switching frames.
>
> I guess so, yes.  But please clarify exactly what you mean by "switching
> frame".  E.g. consider the difference between
> - changing focus from the window manager
> - selecting another frame with `select-frame`.
> - hitting M-x in a minibuffer-free frame (which lends you in the
>   minibuffer of another frame, e.g. in a minibuffer-only frame).

Thanks.  I guess figuring out the precise semantics will have to be
left as an exercise for whoever decides to implement this.

Best regards,
Stefan Kangas

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Monnier]

> Thanks.  I guess figuring out the precise semantics will have to be
> left as an exercise for whoever decides to implement this.

Yes, but it's up to you to describe your use case with enough info that
the semantics that they choose is useful for you.


        Stefan

bug#20097: 25.0.50; focus-out-hook doesn't work w/other emacsclient frame

[Stefan Kangas]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Thanks.  I guess figuring out the precise semantics will have to be
>> left as an exercise for whoever decides to implement this.
>
> Yes, but it's up to you to describe your use case with enough info that
> the semantics that they choose is useful for you.

I'm just triaging bugs, and don't have any use case to provide.
Perhaps the OP will be able to provide us with more details.

Best regards,
Stefan Kangas

bug#20097: focus-out-hook doesn't work w/other emacsclient frame

[Rasmus Pank Roulund]

Stefan Kangas <stefan@marxist.se> writes:

> Stefan Monnier <monnier@iro.umontreal.ca> writes:
>
>>> Thanks.  I guess figuring out the precise semantics will have to be
>>> left as an exercise for whoever decides to implement this.
>>
>> Yes, but it's up to you to describe your use case with enough info that
>> the semantics that they choose is useful for you.
>
> I'm just triaging bugs, and don't have any use case to provide.
> Perhaps the OP will be able to provide us with more details.

I hardly remember at this point.

I think I wanted to use it for opening an Org Agenda view via Gnome Shell
and (type <Super> agenda, opening an emacsclient) and get rid of the
window once I click somewhere else.

Feel free to close.

Rasmus

--
The right to be left alone is a human right

bug#20097: focus-out-hook doesn't work w/other emacsclient frame

[Stefan Kangas]

Rasmus Pank Roulund <rasmus@gmx.us> writes:

>>> Yes, but it's up to you to describe your use case with enough info that
>>> the semantics that they choose is useful for you.
>>
>> I'm just triaging bugs, and don't have any use case to provide.
>> Perhaps the OP will be able to provide us with more details.
>
> I hardly remember at this point.
>
> I think I wanted to use it for opening an Org Agenda view via Gnome Shell
> and (type <Super> agenda, opening an emacsclient) and get rid of the
> window once I click somewhere else.
>
> Feel free to close.

Thanks, it seems to be that it will be hard to make any progress here
without having a specific use-case.

I'm therefore closing this bug report.

Best regards,
Stefan Kangas