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From: Michael Welsh Duggan <mwd@cert.org>
To: Alan Mackenzie <acm@muc.de>
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: Aborting display.  Is this possible?
Date: Tue, 21 Oct 2014 13:00:46 -0400	[thread overview]
Message-ID: <tntd29ljr29.fsf@watermonitor.yellow.cert.org> (raw)
In-Reply-To: <20141020210819.GE2947@acm.acm> (Alan Mackenzie's message of "Mon, 20 Oct 2014 21:08:19 +0000")

Alan Mackenzie <acm@muc.de> writes:

> On Mon, Oct 20, 2014 at 10:24:54PM +0300, Eli Zaretskii wrote:
>> > Date: Mon, 20 Oct 2014 18:57:57 +0000
>> > From: Alan Mackenzie <acm@muc.de>
>> > Cc: emacs-devel@gnu.org
>> >
>> > So, how about the following strategy: when the (new) variable
>> > `face-instead-of-fontifying' is bound to a face, AND the input queue is
>> > non-empty (or, perhaps, very non-empty), the appropriate subroutine of
>> > window-scroll should deem characters without a `face' (or `fontified' ?)
>> > property to have face `face-instead-of-fontifying'.
>
>> > This should empty the input queue pretty quickly, enabling a current
>> > buffer portion to get displayed frequently enough.
>
>> This would mean we will sometimes wind up in the wrong place after
>> scroll.  IOW, you are sacrificing correctness on behalf of some
>> (questionable for now) speedup.
>
> I'd posit that the absolute correctness isn't all that important after an
> auto-repeating PageDown.  For an individual PageDown keystroke, the
> fontification and scrolling would be done accurately as now.

Please be careful.  If you were to change things such that C-v might
scroll heuristically instead of "correctly", please make sure this
behavior is controlled by a configuration value.  When I am trying to
recreate cc-mode problems in order to make bug reports, it is very
important that I can recreate the problem exactly.  It would be very
strange if C-v run manually ended up in a different location than C-v in
a macro, for example.

-- 
Michael Welsh Duggan
(mwd@cert.org)



  parent reply	other threads:[~2014-10-21 17:00 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-19 14:17 Aborting display. Is this possible? Alan Mackenzie
2014-10-19 14:32 ` David Kastrup
2014-10-19 14:54   ` Eli Zaretskii
2014-10-19 14:50 ` Eli Zaretskii
2014-10-19 15:42   ` Alan Mackenzie
2014-10-19 18:09     ` Eli Zaretskii
2014-10-20 11:09       ` Alan Mackenzie
2014-10-20 11:30         ` David Kastrup
2014-10-20 12:00           ` Alan Mackenzie
2014-10-20 15:15             ` Eli Zaretskii
2014-10-20 15:12         ` Eli Zaretskii
2014-10-20 16:56           ` Stefan Monnier
2014-10-20 17:10             ` Eli Zaretskii
2014-10-20 17:40               ` Eli Zaretskii
2014-10-20 18:57           ` Alan Mackenzie
2014-10-20 19:24             ` Eli Zaretskii
2014-10-20 21:08               ` Alan Mackenzie
2014-10-21  8:09                 ` David Kastrup
2014-10-21 10:58                   ` Alan Mackenzie
2014-10-21 11:04                     ` David Kastrup
2014-10-21 14:25                       ` Stefan Monnier
2014-10-21 14:01                   ` Stefan Monnier
2014-10-21 15:35                     ` Eli Zaretskii
2014-10-21 16:27                       ` Stefan Monnier
2014-10-22 18:28                         ` Stephen Leake
2014-10-22 20:10                           ` Stefan Monnier
2014-10-21 17:14                       ` Alan Mackenzie
2014-10-21 18:00                         ` Eli Zaretskii
2014-10-21 18:38                           ` Alan Mackenzie
2014-10-21 18:43                             ` Eli Zaretskii
2014-10-21 19:42                               ` Eli Zaretskii
2014-10-26 12:43                             ` Unfreezing the display during auto-repeated scrolling. [ Was: Aborting display. Is this possible? ] Alan Mackenzie
2014-10-26 16:45                               ` Eli Zaretskii
2014-10-26 20:03                                 ` Alan Mackenzie
2014-10-26 20:20                                   ` Eli Zaretskii
2014-10-26 20:42                                   ` Stefan Monnier
2014-10-26 22:15                                     ` Unfreezing the display during auto-repeated scrolling Alan Mackenzie
2014-10-27  1:03                                       ` Stefan Monnier
2014-10-27 14:28                                         ` Unfreezing the display during auto-repeated scrolling. Simpler approach Alan Mackenzie
2014-10-27 16:51                                           ` Eli Zaretskii
2014-10-27 19:13                                             ` David Engster
2014-10-27 19:26                                               ` Eli Zaretskii
2014-10-27 19:36                                                 ` David Engster
2014-10-27 19:38                                             ` Alan Mackenzie
2014-10-27 21:38                                               ` Stefan Monnier
2014-10-28 18:10                                                 ` Alan Mackenzie
2014-10-29  0:57                                                   ` Stefan Monnier
2014-10-29 14:14                                                     ` Eli Zaretskii
2014-10-29 14:52                                                       ` Alan Mackenzie
2014-10-29 15:37                                                         ` Eli Zaretskii
2014-10-29 16:59                                                         ` Stefan Monnier
2014-10-29 21:25                                                           ` Alan Mackenzie
2014-10-30  1:49                                                             ` Stefan Monnier
2014-10-30 22:09                                                               ` Alan Mackenzie
2014-10-31  3:06                                                                 ` Stefan Monnier
2014-10-31  7:55                                                                   ` Eli Zaretskii
2014-10-31 14:04                                                                     ` Stefan Monnier
2014-11-21 15:44                                                                       ` Alan Mackenzie
2014-11-23  9:51                                                                         ` Tassilo Horn
2014-11-23 10:40                                                                           ` Alan Mackenzie
2014-11-23 19:44                                                                             ` Tassilo Horn
2014-11-23 22:04                                                                               ` Alan Mackenzie
2014-11-24 11:34                                                                                 ` Tassilo Horn
2014-11-24 11:53                                                                                   ` David Kastrup
2014-11-24 16:00                                                                                     ` Alan Mackenzie
2014-11-24 14:37                                                                                 ` Stefan Monnier
2014-11-24 16:08                                                                                   ` Alan Mackenzie
2014-11-24 17:44                                                                                     ` Stefan Monnier
2014-10-27  3:36                                       ` Unfreezing the display during auto-repeated scrolling Eli Zaretskii
2014-10-27 10:05                                         ` Alan Mackenzie
2014-10-27 16:48                                           ` Eli Zaretskii
2014-10-27 22:46                                             ` Alan Mackenzie
2014-10-28  0:22                                               ` Stefan Monnier
2014-10-27  3:33                                     ` Unfreezing the display during auto-repeated scrolling. [ Was: Aborting display. Is this possible? ] Eli Zaretskii
2014-10-21 18:01                         ` Aborting display. Is this possible? Stefan Monnier
2014-10-21 15:40                 ` Eli Zaretskii
2014-10-21 17:00                 ` Michael Welsh Duggan [this message]
2014-10-21 18:25                   ` Alan Mackenzie
2014-10-20  1:59     ` Stefan Monnier
2014-10-20  2:45       ` Eli Zaretskii
  -- strict thread matches above, loose matches on Subject: below --
2014-10-20 17:18 grischka
2014-10-20 17:23 ` Eli Zaretskii

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