Re: Some NS port changes

Re: Some NS port changes

[Zhang Haijun]

There are still too many flickers on macOS 10.13.6.

Steps to reproduce:
1. emacs -Q
2. (setq redisplay-dont-pause nil)
3. Select text across lines with touchpad

I can see blanks and then refreshing, sometimes just a blank retangle without refreshing.


macOS: 10.13.6
Xcode version: 9.2

Re: Some NS port changes

[Alan Third]

On Sun, Jan 20, 2019 at 06:11:17AM +0000, Zhang Haijun wrote:
> There are still too many flickers on macOS 10.13.6.
> 
> Steps to reproduce:
> 1. emacs -Q
> 2. (setq redisplay-dont-pause nil)
> 3. Select text across lines with touchpad
> 
> I can see blanks and then refreshing, sometimes just a blank retangle without refreshing.

FWIW that’s exactly what I would expect to happen with that setting
set to nil. We can’t really stop the NS toolkit trying to update the
screen, but if you pause redisplay part‐way through then it’s not
going to be able to update the areas already marked as needing
redrawn.

Once it’s tried to redraw those areas, it marks them as drawn whether
it was succesful or not, so the next time round they will be ignored.
There’s not very much I can do about that.

What’s the use‐case for setting this variable?
-- 
Alan Third

Re: Some NS port changes

[Zhang Haijun]

> 在 2019年1月20日，下午7:09，Alan Third <alan@idiocy.org> 写道：
> 
> FWIW that’s exactly what I would expect to happen with that setting
> set to nil. We can’t really stop the NS toolkit trying to update the
> screen, but if you pause redisplay part‐way through then it’s not
> going to be able to update the areas already marked as needing
> redrawn.
> 
> Once it’s tried to redraw those areas, it marks them as drawn whether
> it was succesful or not, so the next time round they will be ignored.
> There’s not very much I can do about that.
> 
> What’s the use‐case for setting this variable?
> -- 
> Alan Third

Because of a bug for CJK: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=+23412

Can the area be marked as drawn after it be redrawn?

Re: Some NS port changes

[Eli Zaretskii]

On January 20, 2019 8:11:17 AM GMT+02:00, Zhang Haijun <ccsmile2008@outlook.com> wrote:
> There are still too many flickers on macOS 10.13.6.
> 
> Steps to reproduce:
> 1. emacs -Q
> 2. (setq redisplay-dont-pause nil)
> 3. Select text across lines with touchpad
> 
> I can see blanks and then refreshing, sometimes just a blank retangle
> without refreshing.
> 
> 
> macOS: 10.13.6
> Xcode version: 9.2

The variable redisplay-dont-pause is deprecated.  Don't use it.

Re: Some NS port changes

[Eli Zaretskii]

On January 20, 2019 1:20:13 PM GMT+02:00, Zhang Haijun <ccsmile2008@outlook.com> wrote:
> 
> 
> > 在 2019年1月20日，下午7:09，Alan Third <alan@idiocy.org> 写道：
> > 
> > FWIW that’s exactly what I would expect to happen with that setting
> > set to nil. We can’t really stop the NS toolkit trying to update the
> > screen, but if you pause redisplay part‐way through then it’s not
> > going to be able to update the areas already marked as needing
> > redrawn.
> > 
> > Once it’s tried to redraw those areas, it marks them as drawn
> whether
> > it was succesful or not, so the next time round they will be
> ignored.
> > There’s not very much I can do about that.
> > 
> > What’s the use‐case for setting this variable?
> > -- 
> > Alan Third
> 
> Because of a bug for CJK:
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=+23412
> 
> Can the area be marked as drawn after it be redrawn?

In that bug report you talk about "shaking".  Did you mean flickering?  Because I don't think I see any shaking in the clip.

In any case, this input method is not from Emacs, right?  So I couldn't try reproducing the problem on my machine.

Re: Some NS port changes(recent 3)

[jun]

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I sent this mail 10 hours ago. But I didn’t see it on http://lists.gnu.org/archive/html/emacs-devel/2019-01/index.html.
So I resent it with another mail provider.


At 2019-01-20 20:26:08, "Eli Zaretskii" <eliz@gnu.org> wrote:
>
>In that bug report you talk about "shaking".  Did you mean flickering?  Because I don't think I see any shaking in the clip.
>

>In any case, this input method is not from Emacs, right?  So I couldn't try reproducing the problem on my machine.


Yes, it should be flickering. The same content is cleared(at the same time, the cursor goes to the beginning of the content area) 
and then redisplayed(and the cursor comes back) during inputing.

Yes, the input method is not from emacs. It is provided by the OS.

That bug only happens on macOS. And other apps(including macVim) on the OS don’t have same problem. So it must be a bug of emacs.


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