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.help Subject: Re: Make scroll-{up, down} move point to {start, end} of newly visible text Date: Tue, 08 Aug 2023 15:41:02 +0300 Message-ID: <83y1iln1up.fsf@gnu.org> References: <83mszb0w9l.fsf@gnu.org> <83il9y22e8.fsf@gnu.org> <834jli1uhb.fsf@gnu.org> <83msz7wez5.fsf@gnu.org> <87h6pcj5x1.fsf@dataswamp.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16184"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 08 14:41:10 2023 Return-path: Envelope-to: geh-help-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 1qTM1O-00042l-7c for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 08 Aug 2023 14:41:10 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qTM12-0003Ol-Vx; Tue, 08 Aug 2023 08:40:49 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qTM11-0003Jm-3z for help-gnu-emacs@gnu.org; Tue, 08 Aug 2023 08:40:47 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qTM10-0004aa-Rg for help-gnu-emacs@gnu.org; Tue, 08 Aug 2023 08:40:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=U+sjvKGLDCE/oeFiIXb6121+E5SERp3XwJepD4hTx1o=; b=Q/eRvehqd31G 9UK3BKnPENbfF1E+jWIq4OBe2Iuaq6SFxppvAFL9hpmnq1HBmmTs40NFLVf2Pguksv3MTRaoy2x8n Ih3vGkvCLq10aKsku9kM4hRgEsNyODXlzOUUKC2TVaNOoQma+oTY8503qftaAwlPgFVclAoDvjfmF quSps59R7wlVh7716/kefo643AU1OWuRBwph8eoN1eWdUuNzIQBGpohinBzuk9QZ8pmZZW6wn5RXp 98/4j5zuHHchUEjz9v4QBCtXLYn/O/ynN8F+Mvi8wtDPugpRpgnERH+ObDi3s24g4EYoKaWawY6FP VpyMIc81zS/oQ55pDISr8Q==; In-Reply-To: <87h6pcj5x1.fsf@dataswamp.org> (message from Emanuel Berg on Sun, 06 Aug 2023 22:02:18 +0200) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:144692 Archived-At: > From: Emanuel Berg > Date: Sun, 06 Aug 2023 22:02:18 +0200 > > Eli Zaretskii wrote: > > > We have this only for scrolling with the scroll bar: see > > scroll-bar-adjust-thumb-portion. Implementing this for every > > possible kind of scrolling would need changes to C code, > > I think, since scrolling is actually performed by the > > display engine. > > If one can get the state of scrolling in a window in Elisp one > could solve this in Elisp only since then one could write > a new scroll function on top of the old, and what it would do > is - based on that information - it would either scroll > normally or not call the function at all, if scrolling was > determined not to make any sense. I think your mental model of how scrolling works in Emacs is not accurate. What do you think "scrolling functions" do in Emacs?