bug#14619: 24.3; Daemon mode and NS App could play nicer together

bug#14619: 24.3; Daemon mode and NS App could play nicer together

[Ryan]

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org. Please check that
the From: line contains a valid email address. After a delay of up
to one day, you should receive an acknowledgment at that address.

Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug. If you can, give a recipe
starting from `emacs -Q':

On OS X, if one starts emacs as a daemon and opens up a GUI client 
window and then closes it, the NS App becomes unresponsive. Doing the 
following on OS X will exhibit the bug:

1. Run "emacs --daemon -Q"
2. Run "emacsclient -c" to get a GUI frame
3. Do "C-x C-c" to kill the GUI frame

After this, the Emacs daemon will still be running, and the dock will 
also indicate that the Emacs app is still running. However, the menus 
become nonfunctional. Clicking on "File", "Edit", "View", etc. does not 
pop up any menu at all. Clicking on "Emacs" pops up a menu, but the only 
functional items are "About Emacs" and "Quit Emacs". All keyboard 
shortcuts, even those listed in the menus for functional menu items, are 
nonfunctional.

In short, once the last GUI frame is killed for an Emacs instance, it is 
not possible to have any further interaction with Emacs from the GUI 
other than quitting Emacs entirely. If one creates a new GUI frame by 
running "emacsclient -c" from a terminal, the GUI once again becomes 
responsive.

In any case, I believe that this situation is clearly suboptimal. I can 
think of two reasonable ways for Emacs to handle the closing of the last 
GUI frame. First, Emacs could shut down the NS App, so that OS X would 
think that Emacs had quit and no longer show it as running. Then, when a 
new GUI frame is created via "emacsclient -c", a new NS App instance 
would be created. Second, Emacs could support the behavior of most OS X 
apps, which continue running after the last window is closed, with menus 
and keyboard shortcuts still functional. Either of these is preferable 
to the current behavior.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
`bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/Applications/Emacs.app/Contents/Resources/etc/DEBUG.


In GNU Emacs 24.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.36)
of 2013-03-12 on bob.porkrind.org
Windowing system distributor `Apple', version 10.3.1187
Configured using:
`configure '--host=x86_64-apple-darwin' '--build=i686-apple-darwin'
'--with-ns' 'build_alias=i686-apple-darwin'
'host_alias=x86_64-apple-darwin' 'CC=gcc -mmacosx-version-min=10.7
-isystem
/Users/david/Xcode-10.7_4.5.2/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/
-F/Users/david/Xcode-10.7_4.5.2/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks''

Important settings:
locale-coding-system: nil
default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
recentf-mode: t
bug-reference-prog-mode: t
global-pretty-mode: t
pretty-mode: t
sml-modeline-mode: t
show-paren-mode: t
savehist-mode: t
minibuffer-electric-default-mode: t
minibuffer-depth-indicate-mode: t
ido-yes-or-no-mode: t
ido-ubiquitous-mode: t
icomplete-mode: t
global-undo-tree-mode: t
undo-tree-mode: t
desktop-save-mode: t
delete-selection-mode: t
ido-everywhere: t
shell-dirtrack-mode: t
eldoc-mode: t
autopair-global-mode: t
autopair-mode: t
global-auto-complete-mode: t
auto-complete-mode: t
override-global-mode: t
tooltip-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t

Recent input:
n s _ t e r m _ i n i t <return> C-h f x - o p e n
- <return> <help-echo> <help-echo> M-x f i n d l i
b <right> <return> n s w i n <right> <right> <backspace>
<backspace> <backspace> - w i n <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> C-g
C-g C-g M-x l o a d - l i <return> n o <backspace>
s - w i n C-g C-g <down-mouse-1> <mouse-1> C-x C-f
l i s p <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> e m <return> l i s p / n s
- w i n <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> t e r m / n s w i n <return>
C-s x - o p e n - c o n n e c t i o n C-s <return>
C-x 1 <wheel-up> <double-wheel-up> <triple-wheel-up>
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> C-h f <return> <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> <down-mouse-1>
<mouse-1> s-h <help-echo> <wheel-up> <double-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<help-echo> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1>
<double-down-mouse-1> <double-mouse-1> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-1> <s-down-mouse-1>
<s-mouse-1> <s-down-mouse-1> <s-mouse-1> <down-mouse-1>
<mouse-1> <wheel-down> <double-wheel-down> <wheel-down>
<double-wheel-down> <triple-wheel-down> <wheel-up>
<double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<wheel-down> <double-wheel-down> <triple-wheel-down>
<triple-wheel-down> <wheel-up> <double-wheel-up> <wheel-up>
<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <wheel-down> <wheel-down>
<double-wheel-down> <down-mouse-1> <mouse-1> <wheel-down>
<double-wheel-down> <wheel-up> <double-wheel-up> <triple-wheel-up>
<triple-wheel-up> <wheel-down> <wheel-down> <wheel-down>
<double-wheel-down> <triple-wheel-down> <wheel-up>
<double-wheel-up> <wheel-down> <double-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <wheel-up> <double-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <wheel-up> <double-wheel-up> <triple-wheel-up>
<triple-wheel-up> <wheel-up> <double-wheel-up> <triple-wheel-up>
<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <wheel-up> <double-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <down-mouse-1> <mouse-1> M-x r e
p o r t - e m a c s <return>

Recent messages:
Quit [3 times]
Mark saved where search started
Error during redisplay: (eval (list (sml-modeline-create))) signaled 
(args-out-of-range 1296 1330)
Type C-x 1 to delete the help window.
Source file `/Users/ryan/.emacs.d/elpa/smex-20130421.2153/smex.el' newer 
than byte-compiled file
Quit [6 times]
Mark saved where search started
Error during redisplay: (eval (list (sml-modeline-create))) signaled 
(args-out-of-range 2780 2918)
Type C-x 1 to delete the help window.
scroll-down: Beginning of buffer [14 times]
browse-url-at-point: No URL found

Load-path shadows:
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/Users/ryan/.emacs.d/elpa/fringe-helper-20130519.1641/.dir-locals
~/.emacs.d/el-get/el-get/.dir-locals hides 
/Users/ryan/.emacs.d/elpa/highlight-parentheses-20130523.1752/.dir-locals
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/Users/ryan/.emacs.d/elpa/ido-ubiquitous-20121214.2145/ido-ubiquitous
~/.emacs.d/el-get/el-get/.dir-locals hides 
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Features:
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mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils smex recentf tree-widget wid-edit misearch
multi-isearch cc-langs cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine jka-compr find-func load-dir gitignore-mode
bug-reference vc-git imenu noutline outline pretty-mode conf-mode
bug-reference-github vlfi sh-script smie melpa server face-remap
midnight saveplace uniquify sml-modeline paren savehist minibuf-eldef
mb-depth ido-yes-or-no ido-ubiquitous icomplete undo-tree diff desktop
delsel auto-dim-other-buffers cus-start cus-load ido-speed-hack
.loaddefs ido ess-toolbar ess-mouse mouseme thingatpt browse-url
ess-menu ess-swv ess-noweb ess-noweb-font-lock-mode ess-bugs-l essd-els
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backquote make-network-process ns multi-tty emacs)

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[random832]

If I have Emacs (OSX App) started in daemon mode, and then create a
GUI frame, e.g. emacsclient -c, an instance of Emacs.app starts,
which then does not go away when the frame is closed with C-x C-c.
Most menu items, even ones such as "New Frame (C-x 5 2)" that seem
like they should make sense without a frame, are unresponsive.

The app is also unable to respond to s-q, though it does respond to the
"Quit Emacs (Command-Q)" item in the App menu, which C-h k shows
as sending <ns-power-off> rather than a <menu-bar> sequence.

I'm not sure what behavior should be expected here. In order of my
personal preference:

1. Keep the app open, and most menu commands should open a new
   frame.

2. Somehow (is this possible?) close the app instance without shutting
   down the daemon process, when there are no frames.

3. Somehow create a separate app instance for each emacsclient -c
   process.

In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
 of 2015-04-10 on builder10-9.porkrind.org
Windowing system distributor `Apple', version 10.3.1344
Configured using:
 `configure --with-ns '--enable-locallisppath=/Library/Application
 Support/Emacs/${version}/site-lisp:/Library/Application
 Support/Emacs/site-lisp''

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Starting Emacs daemon.
When done with this frame, type C-x 5 0

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util help-fns mail-prsvr mail-utils server time-date tooltip electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd
fontset image regexp-opt fringe tabulated-list newcomment lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
cocoa ns multi-tty emacs)

Memory information:
((conses 16 72471 4238)
 (symbols 48 17293 0)
 (miscs 40 43 140)
 (strings 32 10183 4263)
 (string-bytes 1 271546)
 (vectors 16 9219)
 (vector-slots 8 376271 16268)
 (floats 8 57 68)
 (intervals 56 173 0)
 (buffers 960 12))

bug#21357: Bug #21357 is a duplicate of #14619

[Random832]

Sorry about this, I had not found the original bug when I searched
before reporting the bug.

bug#21357: Bug #21357 is a duplicate of #14619

[Eli Zaretskii]

> From: Random832 <random832@fastmail.com>
> Date: Tue, 03 Nov 2015 10:39:46 -0500
> 
> 
> Sorry about this, I had not found the original bug when I searched
> before reporting the bug.

No need to apologize, but please do merge them.

Thanks.

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Lars Ingebrigtsen]

random832@fastmail.com writes:

> If I have Emacs (OSX App) started in daemon mode, and then create a
> GUI frame, e.g. emacsclient -c, an instance of Emacs.app starts,
> which then does not go away when the frame is closed with C-x C-c.
> Most menu items, even ones such as "New Frame (C-x 5 2)" that seem
> like they should make sense without a frame, are unresponsive.

(I'm going through old bug reports that unfortunately weren't
resolved at the time.)

Is this problem still present in recent Emacs versions?

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

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Alan Third]

On Mon, Aug 16, 2021 at 02:57:58PM +0200, Lars Ingebrigtsen wrote:
> random832@fastmail.com writes:
> 
> > If I have Emacs (OSX App) started in daemon mode, and then create a
> > GUI frame, e.g. emacsclient -c, an instance of Emacs.app starts,
> > which then does not go away when the frame is closed with C-x C-c.
> > Most menu items, even ones such as "New Frame (C-x 5 2)" that seem
> > like they should make sense without a frame, are unresponsive.
> 
> (I'm going through old bug reports that unfortunately weren't
> resolved at the time.)
> 
> Is this problem still present in recent Emacs versions?

As far as I'm aware it is.
-- 
Alan Third

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Alan Third]

[-- Attachment #1: Type: text/plain, Size: 1405 bytes --]

On Mon, Aug 16, 2021 at 06:13:03PM +0100, Alan Third wrote:
> On Mon, Aug 16, 2021 at 02:57:58PM +0200, Lars Ingebrigtsen wrote:
> > random832@fastmail.com writes:
> > 
> > > If I have Emacs (OSX App) started in daemon mode, and then create a
> > > GUI frame, e.g. emacsclient -c, an instance of Emacs.app starts,
> > > which then does not go away when the frame is closed with C-x C-c.
> > > Most menu items, even ones such as "New Frame (C-x 5 2)" that seem
> > > like they should make sense without a frame, are unresponsive.
> > 
> > (I'm going through old bug reports that unfortunately weren't
> > resolved at the time.)
> > 
> > Is this problem still present in recent Emacs versions?
> 
> As far as I'm aware it is.

The attached patch "fixes" this by hiding the app icon in the dock and
removing the menus. It's still possible to create a new frame using
emacsclient.

There's still a bug when a terminal frame is open and the last GUI
frame is closed. I've put the code in ns_delete_terminal, which may
not be the best place. Perhaps it should go in the normal frame
closing function and check whether there are any remaining open
frames.

The alternative is to occasionally run the NS run loop even when there
are no NS frames open. I don't know how we could do that but it would
allow us to leave the menu and dock icon available and operative even
without any GUI frames open.
-- 
Alan Third

[-- Attachment #2: 0001-Disable-the-NS-app-when-no-frames-are-left-bug-14619.patch --]
[-- Type: text/x-diff, Size: 1487 bytes --]

From 5dd66d7966d32e8c42e12e16b8682c52d4487d81 Mon Sep 17 00:00:00 2001
From: Alan Third <alan@idiocy.org>
Date: Wed, 25 Aug 2021 21:00:07 +0100
Subject: [PATCH] Disable the NS app when no frames are left (bug#14619,
 bug#21357, bug#23586)

* src/nsfns.m (Fx_create_frame): Enable the app.
* src/nsterm.m (ns_delete_terminal): Disable the app.
---
 src/nsfns.m  | 5 +++++
 src/nsterm.m | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/nsfns.m b/src/nsfns.m
index c40367703d..07bcab1816 100644
--- a/src/nsfns.m
+++ b/src/nsfns.m
@@ -1343,6 +1343,11 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
 
   f->output_data.ns->in_animation = NO;
 
+#ifdef NS_IMPL_COCOA
+  /* If the app has previously been disabled, start it up again.  */
+  [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
+#endif
+
   [[EmacsView alloc] initFrameFromEmacs: f];
 
   ns_icon (f, parms);
diff --git a/src/nsterm.m b/src/nsterm.m
index 1c1f0c8f23..4bdc67c10b 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -5014,6 +5014,12 @@ static Lisp_Object ns_string_to_lispmod (const char *s)
 
   block_input ();
 
+#ifdef NS_IMPL_COCOA
+  /* Rather than try to clean up the NS environment we can just
+     disable the app and leave it waiting for any new frames.  */
+  [NSApp setActivationPolicy:NSApplicationActivationPolicyProhibited];
+#endif
+
   image_destroy_all_bitmaps (dpyinfo);
   ns_delete_display (dpyinfo);
   unblock_input ();
-- 
2.30.2

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Lars Ingebrigtsen]

Alan Third <alan@idiocy.org> writes:

> The attached patch "fixes" this by hiding the app icon in the dock and
> removing the menus. It's still possible to create a new frame using
> emacsclient.

I think that makes sense...

> The alternative is to occasionally run the NS run loop even when there
> are no NS frames open. I don't know how we could do that but it would
> allow us to leave the menu and dock icon available and operative even
> without any GUI frames open.

I would expect there to be nothing in the dock when running an Emacs
daemon (and there's no frames open), but don't really have an opinion on
this.

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

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Alan Third]

On Thu, Aug 26, 2021 at 04:00:12PM +0200, Lars Ingebrigtsen wrote:
> Alan Third <alan@idiocy.org> writes:
> 
> > The attached patch "fixes" this by hiding the app icon in the dock and
> > removing the menus. It's still possible to create a new frame using
> > emacsclient.
> 
> I think that makes sense...

Since I don't think we're likely to get anyone testing this on the
strength of this bug report, I've pushed it to master and we can wait
and see if anyone has any comments.

> > The alternative is to occasionally run the NS run loop even when there
> > are no NS frames open. I don't know how we could do that but it would
> > allow us to leave the menu and dock icon available and operative even
> > without any GUI frames open.
> 
> I would expect there to be nothing in the dock when running an Emacs
> daemon (and there's no frames open), but don't really have an opinion on
> this.

I reckon that many Mac users would expect if they run an application
(in the normal way, not daemon mode) and close all the windows the
application menu and dock icon will still work, allowing them to open
new windows and so on. I don't think it's unreasonable for the app to
just quit, though.
-- 
Alan Third

bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame

[Alan Third]

On Sun, Aug 29, 2021 at 10:27:11AM +0100, Alan Third wrote:
> On Thu, Aug 26, 2021 at 04:00:12PM +0200, Lars Ingebrigtsen wrote:
> > Alan Third <alan@idiocy.org> writes:
> > 
> > > The attached patch "fixes" this by hiding the app icon in the dock and
> > > removing the menus. It's still possible to create a new frame using
> > > emacsclient.
> > 
> > I think that makes sense...
> 
> Since I don't think we're likely to get anyone testing this on the
> strength of this bug report, I've pushed it to master and we can wait
> and see if anyone has any comments.

It's been over a month with no complaints, so I'm closing this bug report.
-- 
Alan Third

bug#14619: closed (Re: bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame)

[Ryan C. Thompson]

Hello,

For some reason (perhaps related to bugs being marked duplicates?) I 
didn't see the email about this patch. I will give it a try and report back.

Regards,

Ryan

On 10/9/21 10:58 AM, GNU bug Tracking System wrote:
> Your bug report
>
> #21357: 24.3; Daemon mode and NS App could play nicer together
>
> which was filed against the emacs package, has been closed.
>
> The explanation is attached below, along with your original report.
> If you require more details, please reply to 14619@debbugs.gnu.org.
>

bug#14619: closed (Re: bug#21357: 24.5; Daemon leaves Mac OSX App open after closing GUI frame)

[Ryan C. Thompson]

On 10/9/21 10:58 AM, GNU bug Tracking System wrote:
> Your bug report
>
> #21357: 24.3; Daemon mode and NS App could play nicer together
>
> which was filed against the emacs package, has been closed.
>
> The explanation is attached below, along with your original report.
> If you require more details, please reply to 14619@debbugs.gnu.org.

Ok, I have tested this a bit, and I think it's an improvement over the 
previous behavior. However, I notice some weird edge cases that would 
need to be fixed before I could recommend this for general use. Try the 
following:


0. Start with no emacs running

1. Run "emacs --daemon". The emacs daemon should launch normally.

2. Try to launch the Emacs app normally. Nothing happens.


I'm not sure exactly what *should* happen when you do this, but doing 
nothing is clearly wrong. Possibly defensible choices include:

- automatically detecting a running daemon and running "emacsclient -c" 
instead of "emacs"

- ignoring the daemon and launching a separate non-daemon instance of Emacs

- Popping up a dialogue box informing the user that there's already an 
emacs daemon running?

- Somehow making this a user preference?


In addition, "emacsclient -c" does indeed create a new frame and 
activate the NS app, but that frame is created behind all other OS 
windows, unless it is the frame created upon launch by "emacsclient -c 
-a ''", in which case it appears in front of all other OS windows. This 
seems like it should be governed by a preference, but the default should 
probably be to appear in front, or else the user might not realize that 
the frame was actually created.