From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#16840: 24.3.50; Jerky motion and up/down asymmetry scrolling images in Eww Date: Thu, 26 Sep 2019 21:50:50 +0300 Message-ID: <837e5ulwmt.fsf@gnu.org> References: <874n3rj4ng.fsf@moondust.localdomain> <83eh2v4kx6.fsf@gnu.org> <87y513rrue.fsf_-_@moondust.localdomain> <83fvnb2fbf.fsf@gnu.org> <87r3ib3rdi.fsf@gnus.org> <831tablzxh.fsf@gnu.org> <87h9j61nb1.fsf@gnus.org> <83fuyqlat2.fsf@gnu.org> <87ziwynyim.fsf@moondust.localdomain> <83ziwyjo6p.fsf@gnu.org> <87ftkjngf9.fsf@gnus.org> <83h84zkmof.fsf@gnu.org> <87muerm0v0.fsf@gnus.org> <83ftkjkkmc.fsf@gnu.org> <8736gjkk9i.fsf@gnus.org> <83blv6lxhf.fsf@gnu.org> <87tv8yj48c.fsf@gnus.org> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="58392"; mail-complaints-to="usenet@blaine.gmane.org" Cc: nljlistbox2@gmail.com, 16840@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Sep 26 21:13:49 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iDZD2-000F1G-Tr for geb-bug-gnu-emacs@m.gmane.org; Thu, 26 Sep 2019 21:13:49 +0200 Original-Received: from localhost ([::1]:43260 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDZD1-0008OD-36 for geb-bug-gnu-emacs@m.gmane.org; Thu, 26 Sep 2019 15:13:47 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46517) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDYs2-0000Ve-8H for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 14:52:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iDYs0-0001Co-8p for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 14:52:06 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:36363) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iDYry-0001BL-0w for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 14:52:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iDYrx-0001IW-UE for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 14:52:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 26 Sep 2019 18:52:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 16840 X-GNU-PR-Package: emacs Original-Received: via spool by 16840-submit@debbugs.gnu.org id=B16840.15695238714921 (code B ref 16840); Thu, 26 Sep 2019 18:52:01 +0000 Original-Received: (at 16840) by debbugs.gnu.org; 26 Sep 2019 18:51:11 +0000 Original-Received: from localhost ([127.0.0.1]:45184 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iDYr9-0001HJ-DG for submit@debbugs.gnu.org; Thu, 26 Sep 2019 14:51:11 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:37880) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iDYr7-0001H6-9E for 16840@debbugs.gnu.org; Thu, 26 Sep 2019 14:51:09 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:42768) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iDYr1-0000US-Un; Thu, 26 Sep 2019 14:51:04 -0400 Original-Received: from [176.228.60.248] (port=2105 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iDYr0-0003Su-Vl; Thu, 26 Sep 2019 14:51:03 -0400 In-reply-to: <87tv8yj48c.fsf@gnus.org> (message from Lars Ingebrigtsen on Thu, 26 Sep 2019 20:34:59 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:167320 Archived-At: > From: Lars Ingebrigtsen > Cc: nljlistbox2@gmail.com, 16840@debbugs.gnu.org > Date: Thu, 26 Sep 2019 20:34:59 +0200 > > Eli Zaretskii writes: > > > This is all as expected, so there's no bug here. > > Well, you may expect it, but this bug report is about how apparently a > lot of other people find it surprising. I don't understand why. Your code generates an image whose height is smaller than the window height, and in that case Emacs scrolls the entire image off the window in one go, because all of the image was already visible once. If I decrease the frame height so that the image becomes taller than the window, the image is scrolled partially until you had a chance to see all of it, then the rest is scrolled away in one large step. This is exactly how the code in simple.el is designed and implemented, so I see no bug here. Once again, the principle is to make sure the user sees all of the image before the image is scrolled off the viewport.