bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

When gnus pauses an hourglass mouse pointer is
expected.

This version doesn't change the mouse pointer to
hourglass icon. There is no visual feedback.

I look at the 'Force Quit Applications' panel and
know to wait because no problem is indicated
there.

This has happened two times. The first time I
waited long enough and 'Force Quit'.


In GNU Emacs 26.2.90 (build 2, x86_64-apple-darwin15.6.0, NS appkit-1404.47 Version 10.11.6 (Build 15G22010))
 of 2019-06-19 built on xxx.yyy
Repository revision: 9473231e0f0e96752447e76217ce8938ddeb00c7
Windowing system distributor 'Apple', version 10.3.1404
Recent messages:
nnimap read 3k from a.b.c
Reading active file from archive via nnfolder...done
Reading active file via nndraft...done
Checking new news...done
Copied https://cdn.i-scmp.com/sites/default/files/styles/1280x720/public/d8/images/methode/2019/06/20/3bc238c4-9322-11e9-a6c8-8445313d8ede_image_hires_142351.jpg?itok=l0VFCkaW
https://www.scmp.com/news/china/politics/article/3015339/chinese-former-interpol-president-meng-hongwei-appears-court
Mark all unread articles as read? (y or n) y
Quit
kill-region: Buffer is read-only: #<buffer *Group*>
gnus-articles-to-read: Command attempted to use minibuffer while in minibuffer
Quit
Configured using:
 'configure CC=/usr/bin/clang --without-compress-install --with-ns
 --enable-ns-self-contained --with-jpeg=no --with-gif=no --with-tiff=no
 --without-x --with-cairo --without-xwidgets --with-mailutils'

Configured features:
RSVG DBUS GLIB NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS XIM NS
THREADS LCMS2

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

Major mode: Group

Minor modes in effect:
  diff-auto-refine-mode: t
  cursor-sensor-mode: t
  gnus-undo-mode: t
  which-key-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  electric-pair-mode: t
  doom-modeline-mode: t
  global-eldoc-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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

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bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Lars Ingebrigtsen]

VanL <van@scratch.space> writes:

> When gnus pauses an hourglass mouse pointer is
> expected.
>
> This version doesn't change the mouse pointer to
> hourglass icon. There is no visual feedback.
>
> I look at the 'Force Quit Applications' panel and
> know to wait because no problem is indicated
> there.
>
> This has happened two times. The first time I
> waited long enough and 'Force Quit'.

Emacs doesn't display any hourglasses, but I see that you're on an Apple
OS, so that probably does when a program hangs/works a long time?

But it doesn't with Emacs?  What happens if you eval

(dotimes (i 100000000))

?

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

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sat, 22 Jun 2019 13:50:13 +0200
> Cc: 36306@debbugs.gnu.org
> 
> VanL <van@scratch.space> writes:
> 
> > When gnus pauses an hourglass mouse pointer is
> > expected.
> >
> > This version doesn't change the mouse pointer to
> > hourglass icon. There is no visual feedback.
> >
> > I look at the 'Force Quit Applications' panel and
> > know to wait because no problem is indicated
> > there.
> >
> > This has happened two times. The first time I
> > waited long enough and 'Force Quit'.
> 
> Emacs doesn't display any hourglasses

Emacs displays a special "hourglass" mouse pointer when it does some
prolonged operation.  By default, we should display that mouse pointer
after 1 sec of doing something.  See start_hourglass in xdisp.c.


> What happens if you eval
> 
> (dotimes (i 100000000))

Here (on MS-Windows) Emacs displays the hourglass mouse pointer.

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> Emacs doesn't display any hourglasses
>
> Emacs displays a special "hourglass" mouse pointer when it does some
> prolonged operation.  By default, we should display that mouse pointer
> after 1 sec of doing something.  See start_hourglass in xdisp.c.
>
>> What happens if you eval
>> 
>> (dotimes (i 100000000))
>
> Here (on MS-Windows) Emacs displays the hourglass mouse pointer.

On Debian GNU/Linux, it looks like this doesn't do anything...  but if I
move the mouse pointer out of the Emacs frame, and then back again, I
get a spinner.  I guess I never noticed before.  :-/  Or perhaps I don't
move the mouse pointer a lot.

But, anyway, is there anything Gnus could be doing that would disable
the hourglass when it's doing some prolonged operation?

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

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

> On 22 Jun 2019, at 21:50, Lars Ingebrigtsen <larsi@gnus.org> wrote:
> 
> Emacs doesn't display any hourglasses, but I see that you're on an Apple
> OS, so that probably does when a program hangs/works a long time?

Native apps on Apple OS display a spinning beachball when they lose control of themselves.

The 'Force Quit' panel is how to know the app is unrecoverable and needs to be killed or force quited or relaunched.

I just experienced a lengthy delay and the lower half article display was missing in blank completely.

> But it doesn't with Emacs?  What happens if you eval
> 
> (dotimes (i 100000000))
> 
> ?

;; C-u C-x C-e in scratch buffer 
(dotimes (i 100000000))nil

No hourglass appears. The summary article panel, at upper half, follows the mouse pointer with highlight between square brackets before nil appears, it seems.

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Lars Ingebrigtsen]

VanL <van@scratch.space> writes:

> ;; C-u C-x C-e in scratch buffer 
> (dotimes (i 100000000))
>
> No hourglass appears. The summary article panel, at upper half,
> follows the mouse pointer with highlight between square brackets
> before nil appears, it seems.

Could you try adding a couple of zeroes before evaling again?  Perhaps
your machine is too fast.  :-)

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

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: van@scratch.space,  36306@debbugs.gnu.org
> Date: Sat, 22 Jun 2019 14:13:59 +0200
> 
> > Here (on MS-Windows) Emacs displays the hourglass mouse pointer.
> 
> On Debian GNU/Linux, it looks like this doesn't do anything...  but if I
> move the mouse pointer out of the Emacs frame, and then back again, I
> get a spinner.  I guess I never noticed before.  :-/  Or perhaps I don't
> move the mouse pointer a lot.

Yes, the hourglass pointer usually appears if you move the mouse
(here, it's enough to move it slightly, I don't need to move it off
the Emacs frame and back).

> But, anyway, is there anything Gnus could be doing that would disable
> the hourglass when it's doing some prolonged operation?

What exactly is the prolonged operation Emacs does in the described
scenario?  Some of them don't cause this pointer to appear for boring
technical reasons.

I'm also not sure, but the original report seemed to imply that
previous versions of Gnus did display the hourglass?

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Eli Zaretskii]

> From: VanL <van@scratch.space>
> Date: Sat, 22 Jun 2019 22:26:22 +1000
> Cc: 36306@debbugs.gnu.org
> 
> > (dotimes (i 100000000))
> > 
> > ?
> 
> ;; C-u C-x C-e in scratch buffer 
> (dotimes (i 100000000))nil
> 
> No hourglass appears. The summary article panel, at upper half, follows the mouse pointer with highlight between square brackets before nil appears, it seems.

If no hourglass pointer appears, even after you move the mouse, then I
think the macOS port simply doesn't support this feature.  Did you see
the hourglass pointer in any other situation in this port?

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

> On 22 Jun 2019, at 22:29, Lars Ingebrigtsen <larsi@gnus.org> wrote:
> 
>> ;; C-u C-x C-e in scratch buffer 
>> (dotimes (i 100000000))
>> 
>> No hourglass appears. The summary article panel, at upper half,
>> follows the mouse pointer with highlight between square brackets
>> before nil appears, it seems.
> 
> Could you try adding a couple of zeroes before evaling again?  Perhaps
> your machine is too fast.  :-)

;; C-u C-x C-e
(dotimes (i (expt 2 45))); is still running after 4m:31s...

The mouse pointer is followed by highlight in both upper and lower panels of gnus as expected.

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Lars Ingebrigtsen]

VanL <van@scratch.space> writes:

> ;; C-u C-x C-e
> (dotimes (i (expt 2 45))); is still running after 4m:31s...
>
> The mouse pointer is followed by highlight in both upper and lower
> panels of gnus as expected.

But no hourglass pointer?  Then it sounds like the Apple port of Emacs
doesn't support that?

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

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

> On 22 Jun 2019, at 22:43, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> If no hourglass pointer appears, even after you move the mouse, then I
> think the macOS port simply doesn't support this feature.  Did you see
> the hourglass pointer in any other situation in this port?

Perhaps the macosx-ns-build doesn't have it.

I have always seen the hourglass in other ports. 

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

> On 22 Jun 2019, at 22:49, Lars Ingebrigtsen <larsi@gnus.org> wrote:
> 
> But no hourglass pointer?  Then it sounds like the Apple port of Emacs
> doesn't support that?

I have only managed to build and run macosx-ns-build. This one doesn't do the hourglass.

Is there a way to interrupt dotimes? After 12m:12s it hasn't stopped.

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[Lars Ingebrigtsen]

VanL <van@scratch.space> writes:

> Is there a way to interrupt dotimes? After 12m:12s it hasn't stopped.

Control-g will always stop whatever Emacs is doing.

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

bug#36306: 26.2.90; gnus pause doesn't show hourglass icon

[VanL]

> On 22 Jun 2019, at 22:56, Lars Ingebrigtsen <larsi@gnus.org> wrote:
> 
> Control-g will always stop whatever Emacs is doing.

Ah. Thanks.