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#57434
28.1.91; Terminal Emacs Mac OS flickering.
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Here's the patch.
On Mon, Aug 29, 2022 at 1:44 PM Dmitrii Kuragin <kuragin <at> google.com> wrote:
> On my remote linux machine `line_is_del_ok` should be false where
> ```
> tty->line_ins_del_ok
> = (((tty->TS_ins_line || tty->TS_ins_multi_lines)
> && (tty->TS_del_line || tty->TS_del_multi_lines))
> || (tty->scroll_region_ok
> && tty->TS_fwd_scroll && tty->TS_rev_scroll));
> ```
> because `tput al` and `tput AL` are both false and `tput sr` and `tput sf`
> are false ("unknown terminfo capability").
>
> So, disabling `line_ins_del_ok` on mac os would lead to the same
> configuration I have on the linux. On the linux machine scroll never caused
> any troubles.
>
> So, would it be ok to disable `line_ins_del_ok` for Mac OS? I would send a
> patch if it's OK.
>
> On Mon, Aug 29, 2022 at 1:25 PM Dmitrii Kuragin <kuragin <at> google.com>
> wrote:
>
>> So far:
>> ```
>> :~/Desktop% tput al; echo $?
>> 0
>> :~/Desktop% tput AL; echo $?
>> 1%dL0
>> :~/Desktop% tput dl; echo $?
>> 0
>> :~/Desktop% tput DL; echo $?
>> 1%dM0
>> :~/Desktop% tput sf; echo $?
>>
>> 0
>> 0~/Desktop% tput sr; echo $?
>> :~/Desktop% tput wi; echo $?
>> tput: unknown terminfo capability 'wi'
>> 4
>> :~/Desktop% tput cs; echo $?
>> %p1%d;%p2%dr0
>> :~/Desktop% tput cS; echo $?
>> tput: unknown terminfo capability 'cS'
>> 4
>> ```
>>
>> Seems like Mac Os doesn't support "wi", but the condition is still going
>> to be true.
>>
>> ```
>> tty->line_ins_del_ok = 0;
>> ```
>>
>> make the emacs really smooth w/o any flickering.
>>
>> On Mon, Aug 29, 2022 at 12:37 PM Eli Zaretskii <eliz <at> gnu.org> wrote:
>>
>>> > From: Dmitrii Kuragin <kuragin <at> google.com>
>>> > Date: Mon, 29 Aug 2022 12:26:07 -0700
>>> > Cc: Gerd Möllmann <gerd.moellmann <at> gmail.com>,
>>> > 57434 <at> debbugs.gnu.org
>>> >
>>> > I tried different terminal emulators, Alacritty, iTerm2, Terminal.app
>>> (stock). All of them show the same issue.
>>> > So, it is not a terminal emulator.
>>>
>>> If this happens with all terminal emulators on macOS, we should reset
>>> the line_ins_del_ok flag for macOS. Look in term.c, where it is
>>> initialized by consulting various terminfo features supported by the
>>> terminal. If all the features it consults indeed work on macOS, then
>>> simply say something like
>>>
>>> #ifdef DARWIN_OS
>>> tty->line_ins_del_ok = 0;
>>> #else
>>> ... the current code...
>>> #endif
>>>
>>> and see if the problem goes away.
>>>
>>> Gerd, do you see the same on your system?
>>>
>>
>>
>> --
>> *If you get an email from me outside of the 9-5 it is *not* because I'm
>> always on or expect an immediate response from you; it is because of work
>> flexibility
>> <http://www.inc.com/john-boitnott/how-flexible-hours-can-create-a-better-work-life-balance.html>
>> . Evening and weekend emails are a sign I allocated some regular
>> working hours for other things (such as family, gym, friends,...). And I
>> encourage you to feel free to do the same.
>>
>>
>
> --
> *If you get an email from me outside of the 9-5 it is *not* because I'm
> always on or expect an immediate response from you; it is because of work
> flexibility
> <http://www.inc.com/john-boitnott/how-flexible-hours-can-create-a-better-work-life-balance.html>
> . Evening and weekend emails are a sign I allocated some regular working
> hours for other things (such as family, gym, friends,...). And I encourage
> you to feel free to do the same.
>
>
--
*If you get an email from me outside of the 9-5 it is *not* because I'm
always on or expect an immediate response from you; it is because of work
flexibility
<http://www.inc.com/john-boitnott/how-flexible-hours-can-create-a-better-work-life-balance.html>
. Evening and weekend emails are a sign I allocated some regular working
hours for other things (such as family, gym, friends,...). And I encourage
you to feel free to do the same.
[Message part 2 (text/html, inline)]
[0001-Fix-terminal-Emacs-flickering-during-scrolling-on-Ma.patch (application/octet-stream, attachment)]
This bug report was last modified 170 days ago.
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