From: Eli Zaretskii <eliz@gnu.org>
To: Tomas Hlavaty <tom@logand.com>
Cc: akira@akirakyle.com, emacs-devel@gnu.org
Subject: Re: Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets)
Date: Fri, 04 Dec 2020 10:00:25 +0200 [thread overview]
Message-ID: <834kl2f1ba.fsf@gnu.org> (raw)
In-Reply-To: <87zh2uwq03.fsf@logand.com> (message from Tomas Hlavaty on Thu, 03 Dec 2020 22:15:08 +0100)
> From: Tomas Hlavaty <tom@logand.com>
> Cc: akira@akirakyle.com, emacs-devel@gnu.org
> Date: Thu, 03 Dec 2020 22:15:08 +0100
>
> > Even turning the cursor off doesn't guarantee that Emacs will not
> > trigger overwriting of the images. For example, sometimes Emacs moves
> > the cursor by writing newline characters, which could potentially
> > overwrite the image if the console implements that by writing spaces
> > or clearing each line to EOL.
>
> But that example is a single event and does not cause glitch or
> flickering.
Why do you assume it's a single event? Whenever Emacs decides that
moving the cursor from some coordinates to other coordinates should be
done by writing newlines, it will always do that when it needs to.
That could be every redisplay cycle, depending on the situation.
> Emacs usually does not move the cursor by writing newline characters
> because it feels like it. And it does not do that frequently.
If you build your software on these assumptions, I can assure you it
will break in some use cases.
> If I do not do anything, Emacs will not do anything
That is profoundly incorrect. First, "I do not do anything" doesn't
mean Emacs doesn't: there are timers running in Emacs all the time,
even if it's "emacs -Q". More importantly, what looks to you like
"Emacs doesn't do anything" is the result of redisplay cycles that do
quite a lot of processing, before they decide that nothing should be
redrawn on the glass, and if you assume that processing will never
include moving a cursor, you are building your code on shaky grounds.
next prev parent reply other threads:[~2020-12-04 8:00 UTC|newest]
Thread overview: 210+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 20:58 Rethinking the design of xwidgets Akira Kyle
2020-10-12 22:18 ` joakim
2020-10-13 16:07 ` Akira Kyle
2020-10-13 19:06 ` joakim
2020-10-14 0:33 ` Akira Kyle
2020-10-13 13:36 ` Stefan Monnier
2020-10-13 16:09 ` Akira Kyle
2020-10-13 14:16 ` Eli Zaretskii
2020-10-13 17:05 ` Akira Kyle
2020-10-13 17:24 ` Qiantan Hong
2020-10-13 18:29 ` Akira Kyle
2020-10-13 18:44 ` Qiantan Hong
2020-10-13 19:17 ` Eli Zaretskii
2020-10-13 20:52 ` Akira Kyle
2020-10-14 14:36 ` Eli Zaretskii
2020-10-14 17:01 ` Stefan Monnier
2020-10-15 19:55 ` arthur miller
2020-10-13 18:45 ` Eli Zaretskii
2020-10-13 21:00 ` Akira Kyle
2020-10-14 14:44 ` Eli Zaretskii
2020-10-15 0:35 ` Akira Kyle
2020-10-15 2:07 ` Stefan Monnier
2020-10-15 3:35 ` arthur miller
2020-10-15 15:06 ` Eli Zaretskii
2020-10-15 15:20 ` Arthur Miller
2020-10-15 15:48 ` Eli Zaretskii
2020-10-13 17:55 ` Eli Zaretskii
2020-10-13 18:42 ` Basil L. Contovounesios
2020-10-13 19:10 ` Eli Zaretskii
2020-10-13 20:37 ` Akira Kyle
2020-10-14 14:33 ` Eli Zaretskii
2020-10-14 15:04 ` Arthur Miller
2020-10-14 15:32 ` Eli Zaretskii
2020-10-15 13:20 ` Arthur Miller
2020-10-17 4:26 ` Kai Ma
2020-10-17 4:42 ` Qiantan Hong
2020-11-14 5:40 ` Richard Stallman
2020-10-14 16:53 ` Stefan Monnier
2020-10-14 18:56 ` Aiko Kyle
2020-10-15 12:48 ` Arthur Miller
2020-10-15 16:25 ` Akira Kyle
2020-10-15 12:35 ` Arthur Miller
2020-10-16 4:02 ` Richard Stallman
2020-10-16 13:03 ` Arthur Miller
2020-10-16 18:38 ` Dmitry Gutov
2020-10-17 4:19 ` Richard Stallman
2020-10-17 4:21 ` Richard Stallman
2020-10-17 6:30 ` Arthur Miller
2020-10-17 13:35 ` Stefan Monnier
2020-10-17 19:15 ` Arthur Miller
2020-10-19 3:44 ` Richard Stallman
2020-10-18 4:17 ` Richard Stallman
2020-10-18 4:17 ` Richard Stallman
2020-10-18 9:31 ` Dmitry Gutov
2020-10-19 3:44 ` Richard Stallman
2020-10-19 12:37 ` Dmitry Gutov
2020-10-19 13:43 ` Arthur Miller
2020-10-20 5:13 ` Richard Stallman
2020-10-20 5:47 ` Arthur Miller
2020-10-20 12:58 ` Stefan Monnier
2020-10-20 13:40 ` Arthur Miller
2020-10-21 4:42 ` Richard Stallman
2020-10-21 4:46 ` Richard Stallman
2020-10-20 5:14 ` Richard Stallman
2020-10-20 5:56 ` Arthur Miller
2020-10-20 10:45 ` Dmitry Gutov
2020-10-20 13:49 ` Arthur Miller
2020-10-21 4:46 ` Richard Stallman
2020-10-19 13:34 ` Arthur Miller
2020-10-19 14:04 ` Stefan Monnier
2020-10-20 5:13 ` Richard Stallman
2020-10-18 14:41 ` Arthur Miller
2020-10-19 3:48 ` Richard Stallman
2020-10-19 13:48 ` Arthur Miller
2020-10-16 14:54 ` Dmitry Gutov
2020-10-14 18:07 ` Akira Kyle
2020-10-14 18:32 ` Eli Zaretskii
2020-10-14 19:10 ` Akira Kyle
2020-10-13 18:36 ` Tomas Hlavaty
2020-10-13 18:38 ` Tomas Hlavaty
2020-10-13 21:20 ` Aiko Kyle
2020-10-14 0:12 ` Corwin Brust
2020-10-14 19:16 ` Akira Kyle
2020-10-14 7:32 ` Tomas Hlavaty
2020-10-14 15:02 ` Eli Zaretskii
2020-10-14 16:35 ` Tomas Hlavaty
2020-10-14 19:22 ` Akira Kyle
2020-10-14 21:29 ` Tomas Hlavaty
2020-10-16 4:02 ` Richard Stallman
2020-10-16 13:09 ` Arthur Miller
2020-10-14 19:24 ` Mingde (Matthew) Zeng
2020-10-14 21:46 ` Akira Kyle
2020-10-15 5:17 ` Mingde (Matthew) Zeng
2020-10-14 4:38 ` Richard Stallman
2020-10-14 6:36 ` Akira Kyle
2020-11-22 3:35 ` Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets) Akira Kyle
2020-11-22 12:01 ` Jean Louis
2020-11-22 12:04 ` Jean Louis
2020-11-22 12:18 ` tomas
2020-11-22 12:57 ` Jean Louis
2020-11-22 16:24 ` tomas
2020-11-22 17:18 ` Jean Louis
2020-11-22 17:48 ` tomas
2020-11-22 18:40 ` Akira Kyle
2020-11-22 19:58 ` Jean Louis
2020-11-22 20:29 ` Akira Kyle
2020-11-22 20:38 ` Jean Louis
2020-11-22 15:27 ` Arthur Miller
2020-11-22 12:50 ` Jean Louis
2020-11-22 18:33 ` Akira Kyle
2020-11-22 18:04 ` Eli Zaretskii
2020-11-22 18:46 ` Akira Kyle
2020-11-22 21:20 ` Vasilij Schneidermann
2020-11-22 22:04 ` Akira Kyle
2020-11-22 18:29 ` T.V Raman
2020-11-22 18:53 ` Akira Kyle
2020-11-22 19:35 ` T.V Raman
2020-11-22 20:26 ` Akira Kyle
2020-11-23 0:46 ` T.V Raman
2020-11-23 3:44 ` Akira Kyle
2020-11-23 3:01 ` T.V Raman
2020-11-23 3:47 ` Akira Kyle
2020-11-23 16:29 ` Jose A. Ortega Ruiz
2020-11-23 9:39 ` Lars Ingebrigtsen
2020-11-23 13:26 ` joakim
2020-11-24 6:21 ` Lars Ingebrigtsen
2020-11-23 14:59 ` Arthur Miller
2020-11-23 23:47 ` Alan Third
2020-11-24 3:58 ` Akira Kyle
2020-11-24 8:06 ` Arthur Miller
2020-11-24 5:51 ` Richard Stallman
2020-11-24 6:24 ` Lars Ingebrigtsen
2020-11-26 4:49 ` Richard Stallman
2020-11-26 5:25 ` Arthur Miller
2020-11-26 8:27 ` tomas
2020-11-26 14:55 ` Arthur Miller
2020-11-26 19:11 ` Tomas Hlavaty
2020-11-26 19:34 ` arthur miller
2020-11-27 8:04 ` Tomas Hlavaty
2020-11-27 8:44 ` Arthur Miller
2020-11-27 13:35 ` Richard Stallman
2020-11-27 19:22 ` Arthur Miller
2020-11-27 20:01 ` Eli Zaretskii
2020-11-27 21:22 ` Arthur Miller
2020-11-27 20:07 ` Stefan Monnier
2020-11-27 21:09 ` Arthur Miller
2020-11-27 21:35 ` Stefan Monnier
2020-11-27 23:23 ` Arthur Miller
2020-11-28 0:28 ` Stefan Monnier
2020-11-28 8:48 ` Arthur Miller
2020-11-27 21:22 ` Akira Kyle
2020-11-28 7:31 ` Eli Zaretskii
2020-11-28 5:55 ` Richard Stallman
2020-11-28 8:50 ` Arthur Miller
2020-11-29 5:24 ` Richard Stallman
2020-11-24 7:50 ` Arthur Miller
2020-11-24 8:47 ` tomas
2020-11-24 9:04 ` Arthur Miller
2020-11-25 5:38 ` Richard Stallman
2020-11-25 8:46 ` tomas
2020-11-25 15:26 ` Arthur Miller
2020-11-25 16:15 ` Eric S Fraga
2020-11-24 15:43 ` T.V Raman
2020-11-25 5:38 ` Richard Stallman
2020-11-25 8:54 ` tomas
2020-11-24 6:23 ` Lars Ingebrigtsen
2020-11-24 3:33 ` Akira Kyle
2020-11-24 6:27 ` Lars Ingebrigtsen
2020-11-25 1:36 ` Akira Kyle
2020-11-25 15:11 ` Eli Zaretskii
2020-11-27 20:56 ` Akira Kyle
2020-11-28 8:38 ` Eli Zaretskii
2020-11-28 8:57 ` Arthur Miller
2020-11-28 9:19 ` Eli Zaretskii
2020-11-29 0:22 ` Arthur Miller
2020-11-29 1:29 ` Akira Kyle
2020-11-29 8:22 ` martin rudalics
2020-11-29 19:01 ` Eli Zaretskii
2020-11-30 3:54 ` Akira Kyle
2020-11-30 15:39 ` Eli Zaretskii
2020-11-30 17:03 ` Akira Kyle
2020-11-30 18:11 ` Eli Zaretskii
2020-11-30 18:30 ` Akira Kyle
2020-12-01 7:44 ` Tomas Hlavaty
2020-12-03 0:24 ` Akira Kyle
2020-12-03 8:07 ` Tomas Hlavaty
2020-12-03 20:34 ` Arthur Miller
2020-12-03 20:53 ` Stefan Monnier
2020-12-01 8:01 ` Tomas Hlavaty
2020-12-01 15:36 ` Arthur Miller
2020-12-01 16:48 ` Tomas Hlavaty
2020-12-01 15:58 ` Eli Zaretskii
2020-12-01 17:33 ` Tomas Hlavaty
2020-12-01 19:41 ` Eli Zaretskii
2020-12-02 20:37 ` Tomas Hlavaty
2020-12-03 14:39 ` Eli Zaretskii
2020-12-03 21:02 ` Tomas Hlavaty
2020-12-04 7:48 ` Eli Zaretskii
2020-12-03 0:37 ` Akira Kyle
2020-12-03 8:15 ` Tomas Hlavaty
2020-12-03 15:13 ` Eli Zaretskii
2020-12-03 21:15 ` Tomas Hlavaty
2020-12-04 8:00 ` Eli Zaretskii [this message]
2020-11-30 9:05 ` martin rudalics
2020-11-30 16:10 ` Eli Zaretskii
2020-11-23 22:12 ` Alexander Adolf
2020-11-24 1:30 ` T.V Raman
2020-11-24 8:13 ` Arthur Miller
2020-11-24 3:51 ` Akira Kyle
-- strict thread matches above, loose matches on Subject: below --
2020-12-02 2:58 arthur miller
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