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From: Eli Zaretskii <eliz@gnu.org>
To: Amin Bandali <bandali@gnu.org>,
	Tak Kunihiro <tkk@misasa.okayama-u.ac.jp>
Cc: 45628@debbugs.gnu.org
Subject: bug#45628: 28.0.50; Scrolling on echo area with pixel-scroll-mode enabled locks up Emacs
Date: Sun, 03 Jan 2021 19:30:33 +0200	[thread overview]
Message-ID: <83ble6c4hy.fsf@gnu.org> (raw)
In-Reply-To: <87zh1qc80k.fsf@gnu.org> (message from Amin Bandali on Sun, 03 Jan 2021 11:14:35 -0500)

> From: Amin Bandali <bandali@gnu.org>
> Date: Sun, 03 Jan 2021 11:14:35 -0500
> 
> As the Subject says, scrolling using the mouse wheel on the echo area
> causes Emacs to freeze/lock up (cursor is changed to spinning circle),
> when pixel-scroll-mode is enabled.
> 
> I can reproduce in emacs -Q after evaluating the following in *scratch*:
> 
> (require 'pixel-scroll)
> (pixel-scroll-mode 1)

Thanks.

Tak, can you please look into this?  The code infloops inside
pixel-scroll-down, here:

        (while (pixel-point-at-bottom-p amt) ; prevent too late (multi tries)
          (vertical-motion -1))              ; move point upward

because the mini-window is normally just one screen line high, so its
top and bottom coincide.

Shouldn't we exit the loop when vertical-motion returns zero, which
means it didn't move?

A similar loop exists in pixel-scroll-up, AFAICS.





  reply	other threads:[~2021-01-03 17:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-03 16:14 bug#45628: 28.0.50; Scrolling on echo area with pixel-scroll-mode enabled locks up Emacs Amin Bandali
2021-01-03 17:30 ` Eli Zaretskii [this message]
2021-01-04  8:57   ` Tak Kunihiro
2021-01-04 15:16     ` Eli Zaretskii
2021-01-06  0:47       ` Tak Kunihiro
2021-01-09  9:22         ` Eli Zaretskii

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