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 02:13:50 +0100 Message-ID: <20201031011350.GJ27593@zira.vinc17.org> References: <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> <20201031004617.GI27593@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="18451"; 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 02:14:09 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 1kYfT7-0004iR-34 for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 31 Oct 2020 02:14:09 +0100 Original-Received: from localhost ([::1]:48678 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kYfT6-0004fk-5g for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 30 Oct 2020 21:14:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41776) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kYfT0-0004fe-Tj for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 21:14:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:48670) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kYfT0-0008Kw-L3 for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 21:14:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kYfT0-0007ax-H3 for bug-gnu-emacs@gnu.org; Fri, 30 Oct 2020 21:14:02 -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 01:14:02 +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=B44284.160410683329174 (code B ref 44284); Sat, 31 Oct 2020 01:14:02 +0000 Original-Received: (at 44284) by debbugs.gnu.org; 31 Oct 2020 01:13:53 +0000 Original-Received: from localhost ([127.0.0.1]:60216 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kYfSr-0007aU-Ja for submit@debbugs.gnu.org; Fri, 30 Oct 2020 21:13:53 -0400 Original-Received: from joooj.vinc17.net ([155.133.131.76]:56654) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kYfSq-0007aL-EK for 44284@debbugs.gnu.org; Fri, 30 Oct 2020 21:13:52 -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 EAEF03D8; Sat, 31 Oct 2020 02:13:50 +0100 (CET) Original-Received: by zira.vinc17.org (Postfix, from userid 1000) id 99FCBC233E7; Sat, 31 Oct 2020 02:13:50 +0100 (CET) Content-Disposition: inline In-Reply-To: <20201031004617.GI27593@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:192227 Archived-At: On 2020-10-31 01:46:17 +0100, Vincent Lefevre wrote: > So I assume that the bug occurs somewhere in try_cursor_movement. In try_cursor_movement, one has: if (MATRIX_ROW_BOTTOM_Y (row) > last_y || PT > MATRIX_ROW_END_CHARPOS (row) /* Line is completely visible last line in window and PT is to be set in the next line. */ || (MATRIX_ROW_BOTTOM_Y (row) == last_y && PT == MATRIX_ROW_END_CHARPOS (row) && !row->ends_at_zv_p && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) With the culprit font, MATRIX_ROW_BOTTOM_Y (row) > last_y becomes 1 when the cursor reaches the last line. With a working font, the value is still 0. More precisely, with size 13, MATRIX_ROW_BOTTOM_Y (row) and last_y are: 27 442 40 442 53 442 ... 417 442 430 442 443 442 <-- line 34 (last visible line) and with size 14: 28 476 42 476 56 476 ... 448 476 462 476 476 476 <-- line 34 (last visible line) The issue with size 13 is that MATRIX_ROW_BOTTOM_Y (row) is 13*n+1 instead of 13*n. That's all for today. -- Vincent Lefèvre - Web: 100% accessible validated (X)HTML - Blog: Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)