GNU bug report logs - #675
23.0.60; Edebugging track-mouse

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Package: emacs; Severity: minor; Reported by: bojohan+mail@HIDDEN (Johan Bockgård); Keywords: confirmed; dated Fri, 8 Aug 2008 18:05:05 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
References: <yoijk5er1je7.fsf@HIDDEN>
 <87r237g95z.fsf@HIDDEN> <83o8yb65rz.fsf@HIDDEN>
 <87k18zfysb.fsf@HIDDEN> <83ftjn63zz.fsf@HIDDEN>
Date: Sun, 20 Oct 2019 13:49:20 +0200
In-Reply-To: <83ftjn63zz.fsf@HIDDEN> (Eli Zaretskii's message of "Sun, 20 Oct
 2019 14:38:40 +0300")
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 Content preview:  Eli Zaretskii <eliz@HIDDEN> writes: >> Perhaps the manual
 should mention what kind of symbols? > > See subr.el. ; ;
 Don't throw `throw-on-input'
 on those events by default. (setq while-no-input-ignore-events '(focus-in
 focus-out help-echo iconify-frame make-frame-visible selection-request
 buffer-switch))
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Eli Zaretskii <eliz@HIDDEN> writes:

>> Perhaps the manual should mention what kind of symbols?
>
> See subr.el.

;; Don't throw `throw-on-input' on those events by default.
(setq while-no-input-ignore-events
      '(focus-in focus-out help-echo iconify-frame
        make-frame-visible selection-request buffer-switch))

>> Anyway, I can't see that edebug calls while-no-input?
>
> I don't remember the details of the implementation, but if you already
> tried that and it didn't help in this case, I guess that cannot solve
> the issue.

I didn't know what kind of events to bind the variable to to make it
ignore the mouse movements.

I've now tried (in edebug--recursive-edit) to bind it to

              (while-no-input-ignore-events '(mouse-movement))

but it seems to make no difference.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

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To: Lars Ingebrigtsen <larsi@HIDDEN>
In-reply-to: <87k18zfysb.fsf@HIDDEN> (message from Lars Ingebrigtsen on Sun, 
 20 Oct 2019 13:21:08 +0200)
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
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> From: Lars Ingebrigtsen <larsi@HIDDEN>
> Cc: bojohan+mail@HIDDEN,  675 <at> debbugs.gnu.org
> Date: Sun, 20 Oct 2019 13:21:08 +0200
> 
> Eli Zaretskii <eliz@HIDDEN> writes:
> 
> @defvar while-no-input-ignore-events
> This variable allow setting which special events @code{while-no-input}
> should ignore.  It is a list of symbols.
> 
> Perhaps the manual should mention what kind of symbols?

See subr.el.

> Anyway, I can't see that edebug calls while-no-input?

I don't remember the details of the implementation, but if you already
tried that and it didn't help in this case, I guess that cannot solve
the issue.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
References: <yoijk5er1je7.fsf@HIDDEN>
 <87r237g95z.fsf@HIDDEN> <83o8yb65rz.fsf@HIDDEN>
Date: Sun, 20 Oct 2019 13:21:08 +0200
In-Reply-To: <83o8yb65rz.fsf@HIDDEN> (Eli Zaretskii's message of "Sun, 20 Oct
 2019 14:00:16 +0300")
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 Content preview: Eli Zaretskii <eliz@HIDDEN> writes: >> But back to the
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 problem: (input-pending-p) is non-nil here, >> but it's because of a mouse
 movement, which edebug doesn't care about. >> >> I guess edebug really cares
 about unread-command [...] 
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Eli Zaretskii <eliz@HIDDEN> writes:

>> But back to the original problem:  (input-pending-p) is non-nil here,
>> but it's because of a mouse movement, which edebug doesn't care about.
>> 
>> I guess edebug really cares about unread-command-events here?  So
>> changing the call to just examine that instead might be the fix?
>
> Can Edebug bind while-no-input-ignore-events to something appropriate
> to rectify this?

Hm...  I'm completely unfamiliar with that variable.

@defvar while-no-input-ignore-events
This variable allow setting which special events @code{while-no-input}
should ignore.  It is a list of symbols.

Perhaps the manual should mention what kind of symbols?

Anyway, I can't see that edebug calls while-no-input?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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In-reply-to: <87r237g95z.fsf@HIDDEN> (message from Lars Ingebrigtsen on Sun, 
 20 Oct 2019 09:36:56 +0200)
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
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 <87r237g95z.fsf@HIDDEN>
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> From: Lars Ingebrigtsen <larsi@HIDDEN>
> Date: Sun, 20 Oct 2019 09:36:56 +0200
> 
> But back to the original problem:  (input-pending-p) is non-nil here,
> but it's because of a mouse movement, which edebug doesn't care about.
> 
> I guess edebug really cares about unread-command-events here?  So
> changing the call to just examine that instead might be the fix?

Can Edebug bind while-no-input-ignore-events to something appropriate
to rectify this?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: bojohan+mail@HIDDEN, 675 <at> debbugs.gnu.org
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
References: <yoijk5er1je7.fsf@HIDDEN>
Date: Sun, 20 Oct 2019 09:36:56 +0200
In-Reply-To: <yoijk5er1je7.fsf@HIDDEN> ("Johan
 \=\?utf-8\?Q\?\=5C\=22Bockg\=C3\=A5rd\=22's\?\= message of "Fri,
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 Content preview:  bojohan+mail@HIDDEN (Johan "Bockgård)" writes: >
   emacs -Q > > (defun foo () > (track-mouse (ignore) (ignore))) > > Instrument
    the function with C-u C-M-x. > > Move the mouse. (Don't click.) > > Call
   (foo) > > Press "g". Edebug stops at each expres [...] 
 
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bojohan+mail@HIDDEN (Johan "Bockg=C3=A5rd)" writes:

> emacs -Q
>
> (defun foo ()
>   (track-mouse (ignore) (ignore)))
>
> Instrument the function with C-u C-M-x.
>
> Move the mouse. (Don't click.)
>
> Call (foo)
>
> Press "g". Edebug stops at each expresson inside track-mouse (repeat
> "g").
>
> Expected results: "g" should continue without stopping (only at
> breakpoints).
>
> If the last mouse action was a click the problem doesn't happen.

The code that's causing this is

            (when (input-pending-p)
	      (setq edebug-stop t)
	      (setq edebug-execution-mode 'step) ; for `edebug-overlay-arrow'
	      (edebug-stop))

because when you're tracking the mouse (and you move it), you'll have
input pending, I think?  Hm...  No, it's not that simple -- just moving
the mouse before calling (foo) also triggers this.

Hm!

This gets stranger and stranger.  Here's a simple test case:  Move the
mouse (don't click it), and then eval this:

(track-mouse (input-pending-p))

I get t.  If the last mouse action is a click, then it evaluates to nil.

Right.  Move the mouse (don't click) and then evaluate:

(track-mouse (when (input-pending-p) (read-event "foo: ")))
=3D> (mouse-movement (#<window 4824 on *unsent wide reply to Johan "Bockg=
=C3=A5rd*> 892 (863 . 529) 1948101423 nil 892 (57 . 17) nil (398 . 19) (15 =
. 30)))

So `track-mouse' will give you the previous mouse movement?  OK, that's
fine I guess.

But back to the original problem:  (input-pending-p) is non-nil here,
but it's because of a mouse movement, which edebug doesn't care about.

I guess edebug really cares about unread-command-events here?  So
changing the call to just examine that instead might be the fix?

--=20
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.
bug Marked as found in versions 25.0.95. Request was from npostavs@HIDDEN to control <at> debbugs.gnu.org. Full text available.
bug Marked as found in versions 24.5. Request was from npostavs@HIDDEN to control <at> debbugs.gnu.org. Full text available.
bug Marked as found in versions 24.3. Request was from npostavs@HIDDEN to control <at> debbugs.gnu.org. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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From: npostavs@HIDDEN
To: Xue Fuqiao <xfq@HIDDEN>
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
References: <yoijk5er1je7.fsf@HIDDEN>
 <m3ty8jj8xe.fsf@HIDDEN> <87ppmatery.fsf@HIDDEN>
Date: Sun, 10 Jul 2016 17:04:27 -0400
In-Reply-To: <87ppmatery.fsf@HIDDEN> (Xue Fuqiao's message of "Wed, 26 Feb
 2014 17:16:33 +0800")
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Cc: Lars Magne Ingebrigtsen <larsi@HIDDEN>, 675 <at> debbugs.gnu.org,
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found 675 24.3
found 675 24.5
found 675 25.0.95
quit

Xue Fuqiao <xfq@HIDDEN> writes:

> Lars Magne Ingebrigtsen <larsi@HIDDEN> writes:
>>> (defun foo ()
>>>   (track-mouse (ignore) (ignore)))
>>>
>>> Instrument the function with C-u C-M-x.
>>>
>>> Move the mouse. (Don't click.)
>>>
>>> Call (foo)
>>>
>>> Press "g". Edebug stops at each expresson inside track-mouse (repeat
>>> "g").
>>>
>>> Expected results: "g" should continue without stopping (only at
>>> breakpoints).
>>
>> I can confirm that this issue still exists in Emacs 24.
>
> I can't reproduce it with Emacs 24.3.50.  `g' continues without stopping.

I managed to reproduce with 24.3, 24.4, 24.5, and 25.0.95; though not
with 23.4, 24.1, or 24.2.  What's a bit unclear in the OP, is that I had
to move the mouse while (foo) is being called, i.e., M-: (foo) {while
moving mouse hit RET}.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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From: Xue Fuqiao <xfq@HIDDEN>
To: Lars Magne Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#675: 23.0.60; Edebugging track-mouse
Organization: The Church of Emacs
References: <yoijk5er1je7.fsf@HIDDEN>
 <m3ty8jj8xe.fsf@HIDDEN>
Date: Wed, 26 Feb 2014 17:16:33 +0800
In-Reply-To: <m3ty8jj8xe.fsf@HIDDEN> (Lars Magne Ingebrigtsen's
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Lars Magne Ingebrigtsen <larsi@HIDDEN> writes:
>> (defun foo ()
>>   (track-mouse (ignore) (ignore)))
>>
>> Instrument the function with C-u C-M-x.
>>
>> Move the mouse. (Don't click.)
>>
>> Call (foo)
>>
>> Press "g". Edebug stops at each expresson inside track-mouse (repeat
>> "g").
>>
>> Expected results: "g" should continue without stopping (only at
>> breakpoints).
>
> I can confirm that this issue still exists in Emacs 24.

I can't reproduce it with Emacs 24.3.50.  `g' continues without stopping.

-- 
http://www.gnu.org/software/emacs/
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.

Message received at 675 <at> debbugs.gnu.org:


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From: Lars Magne Ingebrigtsen <larsi@HIDDEN>
To: bojohan+mail@HIDDEN (Johan =?iso-8859-1?Q?Bockg=E5rd?=)
Subject: Re: 23.0.60; Edebugging track-mouse
In-Reply-To: <yoijk5er1je7.fsf@HIDDEN> ("Johan
	\=\?iso-8859-1\?Q\?Bockg\=E5rd\=22's\?\= message of "Fri,
	08 Aug 2008 19:55:28 +0200")
Date: Sun, 11 Sep 2011 19:17:01 +0200
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References: <yoijk5er1je7.fsf@HIDDEN>
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bojohan+mail@HIDDEN (Johan Bockg=E5rd) writes:

> (defun foo ()
>   (track-mouse (ignore) (ignore)))
>
> Instrument the function with C-u C-M-x.
>
> Move the mouse. (Don't click.)
>
> Call (foo)
>
> Press "g". Edebug stops at each expresson inside track-mouse (repeat
> "g").
>
> Expected results: "g" should continue without stopping (only at
> breakpoints).

I can confirm that this issue still exists in Emacs 24.

--=20
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/
Information forwarded to owner <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN:
bug#675; Package emacs. Full text available.
Added tag(s) confirmed. Request was from Lars Magne Ingebrigtsen <larsi@HIDDEN> to control <at> debbugs.gnu.org. Full text available.
Severity set to 'minor' from 'normal' Request was from Lars Magne Ingebrigtsen <larsi@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: bojohan+mail@HIDDEN (Johan =?utf-8?Q?Bockg=C3=A5rd?=)
To: emacs-pretest-bug@HIDDEN
Subject: 23.0.60; Edebugging track-mouse
Date: Fri, 08 Aug 2008 19:55:28 +0200
Message-ID: <yoijk5er1je7.fsf@HIDDEN>
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emacs -Q

(defun foo ()
  (track-mouse (ignore) (ignore)))

Instrument the function with C-u C-M-x.

Move the mouse. (Don't click.)

Call (foo)

Press "g". Edebug stops at each expresson inside track-mouse (repeat
"g").

Expected results: "g" should continue without stopping (only at
breakpoints).

If the last mouse action was a click the problem doesn't happen.

--=20
Johan Bockg=C3=A5rd
Acknowledgement sent to bojohan+mail@HIDDEN (Johan Bockgård):
New bug report received and forwarded. Copy sent to Emacs Bugs <bug-gnu-emacs@HIDDEN>. Full text available.
Report forwarded to bug-submit-list@HIDDEN, Emacs Bugs <bug-gnu-emacs@HIDDEN>:
bug#675; Package emacs. Full text available.
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