From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t Date: Sun, 14 Feb 2021 20:50:08 +0200 Message-ID: <837dnabi1r.fsf@gnu.org> References: <86wnvds38h.fsf@gmail.com> <83czx4c7dt.fsf@gnu.org> <86tuqefye3.fsf@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16128"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 46316@debbugs.gnu.org To: ynyaaa@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Feb 14 20:20:00 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lBMw4-00045N-8t for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 14 Feb 2021 20:20:00 +0100 Original-Received: from localhost ([::1]:43914 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lBMw3-0001dc-A4 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 14 Feb 2021 14:19:59 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44586) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lBMU4-0002Lv-64 for bug-gnu-emacs@gnu.org; Sun, 14 Feb 2021 13:51:04 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:53371) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lBMU2-0006dT-J4 for bug-gnu-emacs@gnu.org; Sun, 14 Feb 2021 13:51:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lBMU2-0003iu-DT for bug-gnu-emacs@gnu.org; Sun, 14 Feb 2021 13:51:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 14 Feb 2021 18:51:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 46316 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: notabug Original-Received: via spool by 46316-submit@debbugs.gnu.org id=B46316.161332862814268 (code B ref 46316); Sun, 14 Feb 2021 18:51:02 +0000 Original-Received: (at 46316) by debbugs.gnu.org; 14 Feb 2021 18:50:28 +0000 Original-Received: from localhost ([127.0.0.1]:36684 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lBMTU-0003i4-3t for submit@debbugs.gnu.org; Sun, 14 Feb 2021 13:50:28 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:54738) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lBMTS-0003ht-D2 for 46316@debbugs.gnu.org; Sun, 14 Feb 2021 13:50:26 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:42898) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lBMTN-0006NR-4Z; Sun, 14 Feb 2021 13:50:21 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4511 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lBMT8-0004pt-Kf; Sun, 14 Feb 2021 13:50:09 -0500 In-Reply-To: <86tuqefye3.fsf@gmail.com> (ynyaaa@gmail.com) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:200027 Archived-At: > From: ynyaaa@gmail.com > Cc: 46316@debbugs.gnu.org > Date: Mon, 15 Feb 2021 00:43:32 +0900 > > >> (let ((buf (generate-new-buffer "tmp"))) > >> (switch-to-buffer buf) > >> (setq truncate-lines t) > >> (dotimes (i 200) > >> (insert (format ":%03d" i)) > >> (when (= 0 (% (1+ i) 100)) (insert ?\n))) > >> (forward-char -1) > >> (sit-for 1) > >> (set-window-hscroll nil (window-hscroll)) > >> (save-excursion > >> (forward-char -100) > >> (insert-char ?\n 10) > >> )) > > > > Sorry, I don't think I follow: what exactly is the bug here? What did > > you expect to happen ,and what did actually happen? > > The expression '(set-window-hscroll nil (window-hscroll))' should not > have any effect That's not true: calling set-window-hscroll inhibits automatic hscrolling, until point moves for some reason. > but if it is deleted from the form, auto-hscroll-mode works > correctly. I think this is expected: the text your recipe adds is not around point, so we don't re-enable auto-hscroll. > Not only point motion but also buffer modification should be checked for > auto-hscroll-mode. If you want this to happen, don't call set-window-hscroll.