From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu Newsgroups: gmane.emacs.devel Subject: Re: Redisplay resets vscroll when window start changes Date: Tue, 16 Nov 2021 08:02:18 +0800 Message-ID: <87tugdnf1x.fsf@yahoo.com> References: <87k0h9pp7t.fsf.ref@yahoo.com> <87k0h9pp7t.fsf@yahoo.com> <83r1bhsdsn.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11913"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.60 (gnu/linux) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Nov 16 01:03:36 2021 Return-path: Envelope-to: ged-emacs-devel@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 1mmlwl-0002qC-8p for ged-emacs-devel@m.gmane-mx.org; Tue, 16 Nov 2021 01:03:35 +0100 Original-Received: from localhost ([::1]:51306 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mmlwj-0003wz-Ez for ged-emacs-devel@m.gmane-mx.org; Mon, 15 Nov 2021 19:03:33 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:41636) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mmlvj-0002px-Er for emacs-devel@gnu.org; Mon, 15 Nov 2021 19:02:31 -0500 Original-Received: from sonic314-21.consmr.mail.ne1.yahoo.com ([66.163.189.147]:39339) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mmlvh-0004Zl-OU for emacs-devel@gnu.org; Mon, 15 Nov 2021 19:02:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1637020947; bh=ni1NpeiMGtAwFIDP3JR7Xk6aTdSyCK0VzC1WQYEyLo4=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From:Subject:Reply-To; b=EhoiGkeeigTAAhZVJ5HfEHx6hA1H4PIvuQiHBCFxAK8HGaN182xy16Ksq13aLa5zPsnSSue7iybHl+nQEDhRtsmXeaCbaBh9EIE3b5hU7E8IyvyCW+BXtKV3hTNvnu6FPTdjkl7/SL+pOjLePNIuRyG5rj9aqPOBEOn10/ST+3X8ZFQiUH83mss5Bbb6ZhIvpNRwCvIXLn1RCJXawq2RCvMVuPvwwxddHH4qDFvZu65num9jazdG0YB4rc/ye3HHfLvhbnlgf0Lr7/mGsrYENVPbdOsTMLcn9TpjmA2ugO32jJ7FgdF4wG73dFS50PvvNd9Bw2UBGLLd2sTXL9y5iA== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1637020947; bh=m/hQTzfDkzfMKMwazCxaCvtKH/B1Jb8ZXyeA0AbPECf=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=MJSTDeqXcJRvMf154eKlIXYf50w7yO6H59HoMXwYdHUV+ny2NkrGeeoOzOtTknQUtgZmmxDVnPsTVDyndLALJJyXtEfyTF3unLA90Pf3sxAntxSV+/3iK/aIXiW+r7dTZsi26JHYtbE+F5BXIWGcetJma4wxyR7M+5P0EeoOBKaIHpoWi/0Em6DsQOVOnAysIXj4ecZB3XeBv9oemClyYqQEPk9jBy8KnePiDJ0YhvFfUiOniIk7i1Ea5oJy47Pb8cjyZ0/0yZMaMu8YT78Cz3A5muQGplcsFMcfcpqNpNCkhhtuHwaXE8LgTQw5pKlB68mTY/sCf15zfG+hMYikmQ== X-YMail-OSG: UyIOgVEVM1lu8Lw72gHu_GIB2XT8yM_FwKx_IdQM19kfzac9dIeeBvGTtQDytmB x2I0wnLKv_dgczlgTqT8A.US.j7J1R75Nqy.5W_4tYJ.enfuazN2Ffnv0Qmz_oSPFf5hKHq_7EGo .mXwh5PHcXYOk67gsulpOXcldtGNqdYXLRafet7HkxI_Rs6D7aMQSsxsPfwDV26j6euijXJSB.YZ 6jjopuLpfFcezu5FjJt0KCXXX_C6_ippeIUAYWveW.vjOv5NubMCzs_4yhNaWSrtFdNvqvF5bSUX OiO6O0wR2v5eruKSsiI6r6oGNo2wrL8r80ahpIaPeYn6vDnVfzIVaQzFYtA57Gpf5rk_sTprDSmU SOjsqPSHeeX1wyajfEgqppTEli5kRHCid1EI7ikTcM_CmlVd7SU65VBNV3ys2KaL8huhO3ZqcTSV d_ABw2yQ9gplR5dfo.01vCSf9DoqgIskbbr7IR7om0RCF2QNklTq9lY2N6t7133l6JIVMQtjXiRj Sw.YMu8UlTgFQyjKQn_EQ6GeTdI336H4yYXWXIkg2XKbN.pxp9oWeX4M6obqBR_JN4GLblGFulis p63j3IBsBS6any5WQoD2AuUwkO5ybu84e44R3roY1cJpciPkz4aetd0h.soSdgx9Sy.mKYQiSH6x oEV4Io9IxO_KvRGvjJXj9nE4Dwtsrz68Pv7W8Yf0aZqfJ8TOndt6abLPbVbhGg5yuHER0JFHRunQ KobunGPbamja3PMtfqwSMEHnOOmUvP4AqNTiWXIR7c1pfqnJpOHvKWz_J_9RbZw7oLkDmpgK7tfg 2444IxkkMyBnYLfwDsZ0NJ1L68keItFnYqmhOkoQLb X-Sonic-MF: Original-Received: from sonic.gate.mail.ne1.yahoo.com by sonic314.consmr.mail.ne1.yahoo.com with HTTP; Tue, 16 Nov 2021 00:02:27 +0000 Original-Received: by kubenode504.mail-prod1.omega.sg3.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 07337f405827bf577d57b6aa22ad4a48; Tue, 16 Nov 2021 00:02:21 +0000 (UTC) In-Reply-To: <83r1bhsdsn.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 15 Nov 2021 16:18:16 +0200") X-Mailer: WebService/1.1.19306 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Received-SPF: pass client-ip=66.163.189.147; envelope-from=luangruo@yahoo.com; helo=sonic314-21.consmr.mail.ne1.yahoo.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:279524 Archived-At: Eli Zaretskii writes: >> It resets the vscroll whenever window start changes, which is annoying >> if you, for example, recenter the window during pixel scroll. > Yes. This is the basis of how scrolling commands work in Emacs: they > set the window-start point. When that happens, vscroll must be reset. I understand that, thanks. >> Is it OK to control whether or not the vscroll is reset there based on a >> variable or a window parameter? It would be very convenient to have >> such a feature. > Are you using scroll commands to implement this? If so, don't: they > are not the right way of having pixel-wise scrolling in Emacs. Uh, no, but I would like to preserve the vscroll across scrolling commands, as that's how pixel-wise scrolling works in other editors. Perhaps some Carbon Emacs people can chime in at this point, as Carbon Emacs does have this option. > Instead, scroll the display by controlling the non-zero vscroll, > without forcing window-start. Yes, that's what I'm doing.