From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Make scroll-{up, down} move point to {start, end} of newly visible text Date: Wed, 09 Aug 2023 22:59:22 +0200 Message-ID: <87wmy4lyol.fsf@dataswamp.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> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10284"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:an4FhguCK/7lBik5xS+lHviuxYU= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Aug 10 17:22:16 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 1qU7UO-0002VW-Ou for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 10 Aug 2023 17:22:16 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qU7Tn-0008Hi-Oj; Thu, 10 Aug 2023 11:21:40 -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 1qTqHE-0001PB-Kd for help-gnu-emacs@gnu.org; Wed, 09 Aug 2023 16:59:32 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qTqHC-0000Uy-Te for help-gnu-emacs@gnu.org; Wed, 09 Aug 2023 16:59:32 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1qTqHB-0006bc-4E for help-gnu-emacs@gnu.org; Wed, 09 Aug 2023 22:59:29 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 10 Aug 2023 11:21:37 -0400 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:144729 Archived-At: 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. [...] That can be helped, (defun scroll-up-1 () (interactive) (scroll-down 1) ) (defun scroll-down-1 () (interactive) (scroll-up 1) ) -- underground experts united https://dataswamp.org/~incal