GNU bug report logs - #37529
27.0.50; last-focus-update is not set on startup from macOS GUI

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Matthew Newton <matt <at> mnewton.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; last-focus-update is not set on startup from macOS GUI
Date: Thu, 26 Sep 2019 13:46:14 -0700

Hi All,

When Emacs is started from the GUI in macOS and receives focus from the window manager, the frame parameter last-focus-update is not set:

(frame-parameter (selected-frame) 'last-focus-update) => nil

If I switch to another macOS window, then back to Emacs, it is then set as expected:

(frame-parameter (selected-frame) 'last-focus-update) => t

Running `emacs` or `emacs -Q` from the command line does not exhibit this problem. I have tried this with no user config at all. Same result.

It seems like there is a focus-in event that either gets lost or is never triggered when macOS starts Emacs and hands off from the GUI. How does Emacs decide whether the frame is focused when it starts up?

Cheers,
Matt


In GNU Emacs 27.0.50 (build 7, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G95))
of 2019-09-20 built on crab
Repository revision: 8b1af4a0bf82a92374d4e8205057880f7d28ede9
Repository branch: master
Windowing system distributor 'Apple', version 10.3.1671
System Description:  Mac OS X 10.14.6

Recent messages:
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Sourcing environment from ‘~/.bin/start-ssh-agent’... done.
Error loading autoloads: (invalid-read-syntax ))
Loading help-at-pt...done
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Emacs started in 0.811 seconds.
Emacs loaded 196 packages in 0.8 seconds.
Starting new Ispell process aspell with default dictionary...
Loading /Users/mn/.emacs.d/recentf...done
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emacs)

Memory information:
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(symbols 48 39623 992)
(strings 32 156533 83500)
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Message #8 received at 37529 <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: Matthew Newton <matt <at> mnewton.com>
Cc: 37529 <at> debbugs.gnu.org
Subject: Re: bug#37529: 27.0.50; last-focus-update is not set on startup
 from macOS GUI
Date: Tue, 31 Aug 2021 20:36:44 +0100

user emacs
usertag 37529 ns
quit

Matthew Newton <matt <at> mnewton.com> writes:

> Hi All,
>
> When Emacs is started from the GUI in macOS and receives focus from the window manager, the frame parameter last-focus-update is not set:
>
> (frame-parameter (selected-frame) 'last-focus-update) => nil
>
> If I switch to another macOS window, then back to Emacs, it is then set as expected:
>
> (frame-parameter (selected-frame) 'last-focus-update) => t
>
> Running `emacs` or `emacs -Q` from the command line does not exhibit this problem. I have tried this with no user config at all. Same result.
>
> It seems like there is a focus-in event that either gets lost or is never triggered when macOS starts Emacs and hands off from the GUI. How does Emacs decide whether the frame is focused when it starts up?

My money is on this being the same cause as bug#47731, etc.
-- 
Alan Third

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