From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: esq@lawlist.com, 17678@debbugs.gnu.org
Subject: bug#17678: 24.4.50; Feature Request -- calculate new `window-start` & `window-end` before visual redisplay
Date: Fri, 13 Jun 2014 08:34:59 -0400 [thread overview]
Message-ID: <jwv8up17zym.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <8361k5xra8.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 13 Jun 2014 09:22:23 +0300")
>> I know of code that does that from outside of redisplay, but within
>> redisplay I only know of the "move point back into view".
> Why does it matter if the trigger comes from outside redisplay or as
> part of redisplay?
If it's done outside of redisplay, then pre-redisplay-function already
gets the right window-start and the problem is already solved.
If OTOH redisplay decides to scroll, it won't re-execute
pre-redisplay-function, so Elisp doesn't get a chance to react to this
new window-start.
> Anyway, one situation of the latter kind is when the text at
> window-start changed. Another one is when the window-start was in a
> continuation line, and the window width changed, see
> compute_window_start_on_continuation_line and its callers.
Ah, right, that makes sense.
Stefan
next prev parent reply other threads:[~2014-06-13 12:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-03 17:48 bug#17678: 24.4.50; Feature Request -- calculate new `window-start` & `window-end` before visual redisplay Keith David Bershatsky
2014-06-11 18:00 ` Stefan Monnier
2014-06-11 18:45 ` Eli Zaretskii
2014-06-11 21:58 ` Stefan Monnier
2014-06-12 17:54 ` Eli Zaretskii
2014-06-13 2:11 ` Stefan Monnier
2014-06-13 6:22 ` Eli Zaretskii
2014-06-13 12:34 ` Stefan Monnier [this message]
2014-06-13 13:27 ` Eli Zaretskii
2014-06-13 14:14 ` Stefan Monnier
2014-06-13 14:47 ` Eli Zaretskii
2014-06-13 18:47 ` Stefan Monnier
2014-06-13 20:21 ` Keith David Bershatsky
2014-06-13 20:59 ` Eli Zaretskii
2014-06-14 9:45 ` Eli Zaretskii
2014-06-14 17:10 ` Keith David Bershatsky
2014-06-15 2:24 ` Stefan Monnier
2014-06-13 16:22 ` Keith David Bershatsky
2014-06-13 17:55 ` Eli Zaretskii
2014-06-13 18:24 ` Keith David Bershatsky
2014-06-13 20:54 ` Eli Zaretskii
2014-06-13 21:19 ` Keith David Bershatsky
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