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: Sat, 12 Aug 2023 16:30:21 +0300 Message-ID: <83edk8e6c2.fsf@gnu.org> References: <83mszb0w9l.fsf@gnu.org> <83il9y22e8.fsf@gnu.org> <834jli1uhb.fsf@gnu.org> <83msz7wez5.fsf@gnu.org> <87h6pcj5x1.fsf@dataswamp.org> <83y1iln1up.fsf@gnu.org> <87wmy4lyol.fsf@dataswamp.org> <837cq2iyyw.fsf@gnu.org> <87zg2yu600.fsf@dataswamp.org> <838rahhl4s.fsf@gnu.org> <87bkfdkbzo.fsf@dataswamp.org> <83ttt5fmmn.fsf@gnu.org> <87jzu1iev5.fsf@dataswamp.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21204"; 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 Sat Aug 12 15:30:33 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 1qUohN-0005Kq-5T for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 12 Aug 2023 15:30:33 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qUogi-0004Ok-7M; Sat, 12 Aug 2023 09:29:52 -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 1qUogg-0004LA-BK for help-gnu-emacs@gnu.org; Sat, 12 Aug 2023 09:29:50 -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 1qUogg-0005BG-2c for help-gnu-emacs@gnu.org; Sat, 12 Aug 2023 09:29:50 -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=0QoRCrZcrTWVw22F73Y9rTJi8UJGkbKglqlsWBs6fd8=; b=TqNVmtYl9jRQ XIsKBBc2uJZrEXaqcUgXIphWVNBMUIsfVzWl84/ssFbQoWloSQ5WOUNlc/yq59KZgpswoL4yRjVcK q0YB1oS+qxQvJBUbTthsNYWBC6dgyP8ZsmxxzF3Qh0GvUAVsPPh095tbhE8RPf1bGiKM9TYf+SoxK ZWCZx5IftYAtpZDCJyd/CDJfGqhqJ3sQvr9JgLJ/fRPqp95l8RNnQgQCPU4IPMzZyQZYwIMW805sn VhYH3zyf11dOJJTSUttMWDCXK+JkoxKkwgN5pS7tBJ+DR+/yE0fRe6xqxMDI12/QW+3fEKqs4zGFW xG1SOGqUc2n1hjtyvbet1g==; In-Reply-To: <87jzu1iev5.fsf@dataswamp.org> (message from Emanuel Berg on Fri, 11 Aug 2023 21:00:14 +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:144778 Archived-At: > From: Emanuel Berg > Date: Fri, 11 Aug 2023 21:00:14 +0200 > > Eli Zaretskii wrote: > > > You can find it in the simple cases like the one you > > describe, but not in general. For example, if you scroll by > > N window-fulls , it is usually impossible to know in advance > > whether the last window will show EOB with empty space > > after it. > > Only one thing to do then, get the scroll state from C to > Lisp, then do the check in Lisp, then sometimes make the > scroll in C ... You can't. I tried to explain why.