From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Vincent Lefevre Newsgroups: gmane.emacs.bugs Subject: bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning Date: Sat, 31 Oct 2020 01:46:17 +0100 Message-ID: <20201031004617.GI27593@zira.vinc17.org> References: <83a6w6cmwe.fsf@gnu.org> <20201030105228.GB27593@zira.vinc17.org> <838sboar11.fsf@gnu.org> <20201030133336.GC27593@zira.vinc17.org> <83pn4zal89.fsf@gnu.org> <20201030163125.GD27593@zira.vinc17.org> <20201030203453.GF27593@zira.vinc17.org> <20201030205702.GG27593@zira.vinc17.org> <83y2jn8lqr.fsf@gnu.org> <20201030230035.GH27593@zira.vinc17.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29162"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/1.14.5+76 (bb407ec3) vl-127292 (2020-06-24) Cc: 44284@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Oct 31 01:47:10 2020 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 1kYf30-0007S9-OJ for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 31 Oct 2020 01:47:10 +0100 Original-Received: from localhost ([::1]:46624 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kYf2z-00021g-Bk for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 30 Oct 2020 20:47:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38748) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kYf2s-00021V-Om for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 20:47:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:48659) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kYf2s-0005Xk-Fw for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 20:47:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kYf2s-0006xO-D4 for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 20:47:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Vincent Lefevre Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 31 Oct 2020 00:47:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44284 X-GNU-PR-Package: emacs Original-Received: via spool by 44284-submit@debbugs.gnu.org id=B44284.160410518226692 (code B ref 44284); Sat, 31 Oct 2020 00:47:02 +0000 Original-Received: (at 44284) by debbugs.gnu.org; 31 Oct 2020 00:46:22 +0000 Original-Received: from localhost ([127.0.0.1]:60205 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kYf2E-0006wR-08 for submit@debbugs.gnu.org; Fri, 30 Oct 2020 20:46:22 -0400 Original-Received: from joooj.vinc17.net ([155.133.131.76]:56640) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kYf2B-0006wI-EA for 44284@debbugs.gnu.org; Fri, 30 Oct 2020 20:46:19 -0400 Original-Received: from smtp-zira.vinc17.net (128.119.75.86.rev.sfr.net [86.75.119.128]) by joooj.vinc17.net (Postfix) with ESMTPSA id A609D3C3; Sat, 31 Oct 2020 01:46:17 +0100 (CET) Original-Received: by zira.vinc17.org (Postfix, from userid 1000) id 45888C233E7; Sat, 31 Oct 2020 01:46:17 +0100 (CET) Content-Disposition: inline In-Reply-To: <20201030230035.GH27593@zira.vinc17.org> X-Mailer-Info: https://www.vinc17.net/mutt/ 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:192225 Archived-At: What happens is the following. In xdisp.c, fucntion redisplay_window: /* Handle case where text has not changed, only point, and it has not moved off the frame, and we are not retrying after hscroll. (current_matrix_up_to_date_p is true when retrying.) */ if (current_matrix_up_to_date_p && (rc = try_cursor_movement (window, startp, &temp_scroll_step), rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) rc is normally 0, but when the last line is reached, rc = 2 (CURSOR_MOVEMENT_MUST_SCROLL). So I assume that the bug occurs somewhere in try_cursor_movement. -- Vincent Lefèvre - Web: 100% accessible validated (X)HTML - Blog: Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)