GNU bug report logs - #71912
30.0.50; Inaccurate window-absolute-pixel-position Values on macOS After Sleep and During Fullscreen Mode

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

From: Jones Stephen <happyojones <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; Inaccurate window-absolute-pixel-position Values on macOS
 After Sleep and During Fullscreen Mode
Date: Wed, 3 Jul 2024 10:38:16 +0800

[Message part 1 (text/plain, inline)]

Dear Emacs Developers,

I am encountering an issue with window-absolute-pixel-position on macOS
that leads to incorrect Y-coordinate values under specific conditions. This
bug appears to manifest in two scenarios: after the system resumes from
sleep, and when Emacs is in fullscreen mode.

Environment:

Emacs Version: (30.0.50)
Operating System: macOS (After 14.00)
Issue Description:

After Sleep: When macOS resumes from sleep, the Y-coordinate value returned
by window-absolute-pixel-position is off by approximately one-fourth of the
screen height.
During Fullscreen Mode: In fullscreen mode, the Y-coordinate is incorrectly
offset by the height of the navbar.
Steps to Reproduce:

Open Emacs and position a window at a known pixel position.
Either put the system to sleep and wake it, or switch Emacs to fullscreen
mode.
Evaluate (window-absolute-pixel-position) and note the Y-coordinate.
Expected Behavior:
The function should return accurate window positions regardless of sleep
mode or fullscreen state, without any unexpected offsets.

Actual Behavior:
The Y-coordinate is inaccurately calculated, showing a significant offset
that seems to be influenced by system sleep and fullscreen transitions.

This issue can be particularly disruptive in workflows that rely on precise
window positioning, such as automated GUI testing or window management
scripts. Any insights or fixes would be greatly appreciated!

Thank you for your attention to this matter.

Best regards,
happyo


In GNU Emacs 30.0.50 (build 2, aarch64-apple-darwin23.3.0, NS
appkit-2487.40 Version 14.3 (Build 23D56)) of 2024-05-14 built on
happyo.local
Windowing system distributor 'Apple', version 10.3.2554
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[Message part 2 (text/html, inline)]

Message #8 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Cc: 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Tue, 23 Jul 2024 13:06:09 +0200

Jones Stephen <happyojones <at> gmail.com> writes:

> Dear Emacs Developers,
>
> I am encountering an issue with window-absolute-pixel-position on macOS that leads to incorrect Y-coordinate values under specific conditions. This
> bug appears to manifest in two scenarios: after the system resumes from sleep, and when Emacs is in fullscreen mode.
>
> Environment:
>
> Emacs Version: (30.0.50)
> Operating System: macOS (After 14.00)
> Issue Description:
>
> After Sleep: When macOS resumes from sleep, the Y-coordinate value returned by window-absolute-pixel-position is off by approximately one-fourth
> of the screen height.
> During Fullscreen Mode: In fullscreen mode, the Y-coordinate is incorrectly offset by the height of the navbar.
> Steps to Reproduce:
>
> Open Emacs and position a window at a known pixel position.
> Either put the system to sleep and wake it, or switch Emacs to fullscreen mode.
> Evaluate (window-absolute-pixel-position) and note the Y-coordinate.
> Expected Behavior:
> The function should return accurate window positions regardless of sleep mode or fullscreen state, without any unexpected offsets.
>
> Actual Behavior:
> The Y-coordinate is inaccurately calculated, showing a significant offset that seems to be influenced by system sleep and fullscreen transitions.
>
> This issue can be particularly disruptive in workflows that rely on precise window positioning, such as automated GUI testing or window management
> scripts. Any insights or fixes would be greatly appreciated!
>
> Thank you for your attention to this matter.
>
> Best regards,
> happyo

I can reproduce this (only tried the fullscreen case), but I don't know
how to fix it. In a fullscreen frame, eval

  (ns-frame-edges (selected-frame) 'native-edges)
  -> (566 39 2290 1107)

That is, both left and top are bogus values. Also,

  (frame-parameter (selected-frame) 'fullscreen)
  -> fullboth
  (frame-parameter (selected-frame) 'top)
  -> 39
  (frame-parameter (selected-frame) 'left)
  -> 566

which is why ns-frame-edges in its current implementation returns these
values for left and top. Don't know what is expected here. Should top
and left frame parameters have been set to 0 somewhere? Or is the
implementation of ns-frame-edges wrong in using top_pos and left_pos of
the frame?

Message #11 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Cc: Alan Third <alan <at> idiocy.org>, 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Thu, 25 Jul 2024 09:39:16 +0200

[Message part 1 (text/plain, inline)]

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> Jones Stephen <happyojones <at> gmail.com> writes:
>
>> Dear Emacs Developers,
>>
>> I am encountering an issue with window-absolute-pixel-position on macOS that leads to incorrect Y-coordinate values under specific conditions. This
>> bug appears to manifest in two scenarios: after the system resumes from sleep, and when Emacs is in fullscreen mode.
>>
>> Environment:
>>
>> Emacs Version: (30.0.50)
>> Operating System: macOS (After 14.00)
>> Issue Description:
>>
>> After Sleep: When macOS resumes from sleep, the Y-coordinate value returned by window-absolute-pixel-position is off by approximately one-fourth
>> of the screen height.
>> During Fullscreen Mode: In fullscreen mode, the Y-coordinate is incorrectly offset by the height of the navbar.
>> Steps to Reproduce:
>>
>> Open Emacs and position a window at a known pixel position.
>> Either put the system to sleep and wake it, or switch Emacs to fullscreen mode.
>> Evaluate (window-absolute-pixel-position) and note the Y-coordinate.
>> Expected Behavior:
>> The function should return accurate window positions regardless of sleep mode or fullscreen state, without any unexpected offsets.
>>
>> Actual Behavior:
>> The Y-coordinate is inaccurately calculated, showing a significant offset that seems to be influenced by system sleep and fullscreen transitions.
>>
>> This issue can be particularly disruptive in workflows that rely on precise window positioning, such as automated GUI testing or window management
>> scripts. Any insights or fixes would be greatly appreciated!
>>
>> Thank you for your attention to this matter.
>>
>> Best regards,
>> happyo
>
> I can reproduce this (only tried the fullscreen case), but I don't know
> how to fix it. In a fullscreen frame, eval
>
>   (ns-frame-edges (selected-frame) 'native-edges)
>   -> (566 39 2290 1107)
>
> That is, both left and top are bogus values. Also,
>
>   (frame-parameter (selected-frame) 'fullscreen)
>   -> fullboth
>   (frame-parameter (selected-frame) 'top)
>   -> 39
>   (frame-parameter (selected-frame) 'left)
>   -> 566
>
> which is why ns-frame-edges in its current implementation returns these
> values for left and top. Don't know what is expected here. Should top
> and left frame parameters have been set to 0 somewhere? Or is the
> implementation of ns-frame-edges wrong in using top_pos and left_pos of
> the frame?

The following patch for master addresses this at least partially. Part
of the problem is, it appears to me, is that windowDidMove is not called
when entering/exiting fullscreen mode, so that a frame's left_pos and
top_pos are not adjusted. The patch tries to fix that. I haven't found
out what to do with the frame parameters top and left.

(Alan Third CC'd)

[0001-macOS-adjust-frame-position-when-entering-exiting-fu.patch (text/x-patch, attachment)]

Message #14 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: Jones Stephen <happyojones <at> gmail.com>, 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Fri, 26 Jul 2024 20:24:56 +0100

On Thu, Jul 25, 2024 at 09:39:16AM +0200, Gerd Möllmann wrote:
> Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
> 
> The following patch for master addresses this at least partially. Part
> of the problem is, it appears to me, is that windowDidMove is not called
> when entering/exiting fullscreen mode, so that a frame's left_pos and
> top_pos are not adjusted. The patch tries to fix that. I haven't found
> out what to do with the frame parameters top and left.

If you look at toggleFullScreen it creates a new NSWindow for
switching to fullscreen, or re-uses the old non-fullscreen NSWindow
when switching out of fullscreen, so the windows don't move.

You can actually just call windowDidMove directly. I'd suggest doing
it at the end of toggleFullScreen.

-- 
Alan Third

Message #17 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Alan Third <alan <at> idiocy.org>
Cc: Jones Stephen <happyojones <at> gmail.com>, 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Fri, 26 Jul 2024 21:27:12 +0200

Alan Third <alan <at> idiocy.org> writes:

> On Thu, Jul 25, 2024 at 09:39:16AM +0200, Gerd Möllmann wrote:
>> Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
>> 
>> The following patch for master addresses this at least partially. Part
>> of the problem is, it appears to me, is that windowDidMove is not called
>> when entering/exiting fullscreen mode, so that a frame's left_pos and
>> top_pos are not adjusted. The patch tries to fix that. I haven't found
>> out what to do with the frame parameters top and left.
>
> If you look at toggleFullScreen it creates a new NSWindow for
> switching to fullscreen, or re-uses the old non-fullscreen NSWindow
> when switching out of fullscreen, so the windows don't move.
>
> You can actually just call windowDidMove directly. I'd suggest doing
> it at the end of toggleFullScreen.

Thanks, I'll give that a try tomorrow.

Message #20 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Alan Third <alan <at> idiocy.org>
Cc: Jones Stephen <happyojones <at> gmail.com>, 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Fri, 26 Jul 2024 22:32:20 +0200

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> Alan Third <alan <at> idiocy.org> writes:
>
>> On Thu, Jul 25, 2024 at 09:39:16AM +0200, Gerd Möllmann wrote:
>>> Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
>>> 
>>> The following patch for master addresses this at least partially. Part
>>> of the problem is, it appears to me, is that windowDidMove is not called
>>> when entering/exiting fullscreen mode, so that a frame's left_pos and
>>> top_pos are not adjusted. The patch tries to fix that. I haven't found
>>> out what to do with the frame parameters top and left.
>>
>> If you look at toggleFullScreen it creates a new NSWindow for
>> switching to fullscreen, or re-uses the old non-fullscreen NSWindow
>> when switching out of fullscreen, so the windows don't move.
>>
>> You can actually just call windowDidMove directly. I'd suggest doing
>> it at the end of toggleFullScreen.
>
> Thanks, I'll give that a try tomorrow.

Tried it today :-).

And it looks like toggleFullScreen is somehow not being used. When I
press the green button to go into fullscreen, I land in
windowDidEnterFullscreen, but it's called directly from AppKit. Similar
for exiting fullscreen.

* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 8.1
    frame #0: 0x0000000100365e54 emacs`-[EmacsView windowDidEnterFullScreen](self=0x000000014860f930, _cmd="windowDidEnterFullScreen") at nsterm.m:8350:4
    frame #1: 0x0000000100365e30 emacs`-[EmacsView windowDidEnterFullScreen:](self=0x000000014860f930, _cmd="windowDidEnterFullScreen:", notification=@"NSWindowDidEnterFullScreenNotification") at nsterm.m:8344:3
  frame #2: 0x0000000191b4f144 CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 148
  frame #3: 0x0000000191be33d8 CoreFoundation`___CFXRegistrationPost_block_invoke + 88
  frame #4: 0x0000000191be3320 CoreFoundation`_CFXRegistrationPost + 440
  frame #5: 0x0000000191b1d678 CoreFoundation`_CFXNotificationPost + 768
  frame #6: 0x0000000192c3a4e4 Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 88
  frame #7: 0x00000001961742b8 AppKit`-[NSWindow(NSFullScreen) _didEnterFullScreen] + 92
  frame #8: 0x0000000195f568d8 AppKit`-[_NSEnterFullScreenTransitionController doAfterEnterFullScreen] + 208
  frame #9: 0x0000000195f57710 AppKit`-[_NSEnterFullScreenTransitionController _performFinalTransitionCleanup] + 56
  frame #10: 0x0000000195f5767c AppKit`__68-[_NSEnterFullScreenTransitionController _startFullScreenTransition]_block_invoke + 236
  frame #11: 0x00000001918c8750 libdispatch.dylib`_dispatch_call_block_and_release + 32
  frame #12: 0x00000001918ca3e8 libdispatch.dylib`_dispatch_client_callout + 20
  frame #13: 0x00000001918d8bb8 libdispatch.dylib`_dispatch_main_queue_drain + 988
  frame #14: 0x00000001918d87cc libdispatch.dylib`_dispatch_main_queue_callback_4CF + 44
  frame #15: 0x0000000191b9bad4 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
  frame #16: 0x0000000191b59258 CoreFoundation`__CFRunLoopRun + 1996
  frame #17: 0x0000000191b58434 CoreFoundation`CFRunLoopRunSpecific + 608
  frame #18: 0x000000019c2fc19c HIToolbox`RunCurrentEventLoopInMode + 292
  frame #19: 0x000000019c2fbfd8 HIToolbox`ReceiveNextEventCommon + 648
  frame #20: 0x000000019c2fbd30 HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 76
  frame #21: 0x00000001953b7d68 AppKit`_DPSNextEvent + 660
  frame #22: 0x0000000195bad808 AppKit`-[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 700
  frame #23: 0x00000001953ab09c AppKit`-[NSApplication run] + 476
    frame #24: 0x000000010035b4bc emacs`-[EmacsApp run](self=0x0000000149005bf0, _cmd="run") at nsterm.m:5952:7
    frame #25: 0x0000000100359b38 emacs`ns_select_1(nfds=0, readfds=0x000000016fdfd24c, writefds=0x000000016fdfd1cc, exceptfds=0x0000000000000000, timeout=0x000000016fdfd1a0, sigmask=0x0000000000000000, run_loop_only=NO) at nsterm.m:4964:3
    frame #26: 0x00000001003596f8 emacs`ns_select(nfds=0, readfds=0x000000016fdfd24c, writefds=0x000000016fdfd1cc, exceptfds=0x0000000000000000, timeout=0x000000016fdfd1a0, sigmask=0x0000000000000000) at nsterm.m:5016:10
    frame #27: 0x00000001002cc594 emacs`wait_reading_process_output(time_limit=0, nsecs=0, read_kbd=-1, do_display=true, wait_for_cell=(struct Lisp_Symbol *) $0 = 0x0000000100a840d0, wait_proc=0x0000000000000000, just_wait_proc=0) at process.c:5748:18

Message #23 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Cc: Alan Third <alan <at> idiocy.org>, 71912 <at> debbugs.gnu.org
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Tue, 30 Jul 2024 06:06:33 +0200

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> The following patch for master addresses this at least partially. Part
> of the problem is, it appears to me, is that windowDidMove is not called
> when entering/exiting fullscreen mode, so that a frame's left_pos and
> top_pos are not adjusted. The patch tries to fix that. I haven't found
> out what to do with the frame parameters top and left.

I've pushed this to emacs-30.

Frame parameters are handled automatically, and it also fixes weird
non-system tooltip placement on fullscreen frames where the tooltip
opens in another workspace.

Closing.

Message #28 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: 71912 <at> debbugs.gnu.org
Cc: Jones Stephen <happyojones <at> gmail.com>
Subject: [Gerd Möllmann] Re: bug#71912: 30.0.50; Inaccurate
 window-absolute-pixel-position Values on macOS After Sleep and During
 Fullscreen Mode
Date: Sun, 11 Aug 2024 08:49:13 +0200

[Message part 1 (text/plain, inline)]

Forwarded to bug list to keep it informed.

-------------------- Start of forwarded message --------------------
From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Subject: Re: bug#71912: 30.0.50; Inaccurate window-absolute-pixel-position
 Values on macOS After Sleep and During Fullscreen Mode
Date: Sun, 11 Aug 2024 08:41:49 +0200

[Message part 2 (text/plain, inline)]

Jones Stephen <happyojones <at> gmail.com> writes:

> Thank you for the recent patch. I wanted to let you know that after
> using the latest version of Emacs, I found that the fullscreen issue
> has been resolved, which is great news—thank you for that!
>
> However, I’m still encountering an issue with the frame position after
> the system wakes from sleep. Here’s how to reproduce it:
>
> 1. Open Emacs.
> 2. Use a window management tool like Rectangle to position Emacs on one side of the screen.
> 3. Put macOS to sleep.
> 4. Wait for a while, approximately 30 minutes.
> 5. Wake up macOS, enter the login password, and then focus back on Emacs.
>
> At this point, the frame position seems to be incorrect.

I can reproduce this here.

> Interestingly, when I use Rectangle to move Emacs to the other side of
> the screen, the position issue is resolved.
>
> I believe this could be related to missing a system wake notification.
> Perhaps adding something like:
>
> ```swift
> NotificationCenter.default.addObserver(
>     self,
>     selector: #selector(systemDidWake),
>     name: NSWorkspace.didWakeNotification,
>     object: nil
> )
> ```
>
> and calling `adjustEmacsFrameRect` in the callback could address this
> issue. Alternatively, calling `adjustEmacsFrameRect` whenever
> `windowDidBecomeKey` is triggered might also work.
>

Indeed, that seems to work, although I find it strage that something
like that is necessary. But what do I know.

Could you please try the attached patch?

[0001-macOS-Wrong-frame-rectangle-after-wake-bug-71912.patch (text/x-patch, attachment)]

[Message part 4 (text/plain, inline)]

-------------------- End of forwarded message --------------------

Message #31 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Cc: 71912 <at> debbugs.gnu.org
Subject: Re: [Gerd Möllmann] Re: bug#71912: 30.0.50;
 Inaccurate
 window-absolute-pixel-position Values on macOS After Sleep and During
 Fullscreen Mode
Date: Sun, 11 Aug 2024 13:25:04 +0200

[Message part 1 (text/plain, inline)]

Jones Stephen <happyojones <at> gmail.com> writes:

> Thank you for the patch. I’ve tested it, and it does help, but I
> noticed there’s still a slight issue.
>
> Here’s what I found: if I leave my Mac idle for a while and it enters
> sleep mode, when I wake up the Mac and click to focus on Emacs, the
> frame position sometimes appears to be incorrect. However, if I put
> the Mac to sleep again and then immediately wake it up, the frame
> position is correct when I return to Emacs.
>
> Interestingly, when I moved the `adjustEmacsFrameRect` call to the
> `windowDidBecomeKey` method, the issue was completely resolved. After
> making this adjustment, the frame position remains correct regardless
> of the sleep duration or how the system is woken up.
>

(Please keep the list in CC, I've added it for this reply.)

Thanks. So an a complete patch would look like the attached patch,
right? Could you please confirm?

[0001-macOS-Wrong-frame-rectangle-after-wake-bug-71912.patch (text/x-patch, attachment)]

Message #34 received at 71912 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Jones Stephen <happyojones <at> gmail.com>
Cc: 71912 <at> debbugs.gnu.org
Subject: Re: [Gerd Möllmann] Re: bug#71912: 30.0.50;
 Inaccurate
 window-absolute-pixel-position Values on macOS After Sleep and During
 Fullscreen Mode
Date: Mon, 12 Aug 2024 05:16:54 +0200

Jones Stephen <happyojones <at> gmail.com> writes:

> Yes, I can confirm that the attached patch resolves the issue.

Pushed to emacs-30. Thanks for testing!


>
> Gerd Möllmann <gerd.moellmann <at> gmail.com> 于2024年8月11日周日 19:25写道：
>
>  Jones Stephen <happyojones <at> gmail.com> writes:
>
>  > Thank you for the patch. I’ve tested it, and it does help, but I
>  > noticed there’s still a slight issue.
>  >
>  > Here’s what I found: if I leave my Mac idle for a while and it enters
>  > sleep mode, when I wake up the Mac and click to focus on Emacs, the
>  > frame position sometimes appears to be incorrect. However, if I put
>  > the Mac to sleep again and then immediately wake it up, the frame
>  > position is correct when I return to Emacs.
>  >
>  > Interestingly, when I moved the `adjustEmacsFrameRect` call to the
>  > `windowDidBecomeKey` method, the issue was completely resolved. After
>  > making this adjustment, the frame position remains correct regardless
>  > of the sleep duration or how the system is woken up.
>  >
>
>  (Please keep the list in CC, I've added it for this reply.)
>
>  Thanks. So an a complete patch would look like the attached patch,
>  right? Could you please confirm?

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