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: Fri, 11 Aug 2023 14:19:23 +0200 Message-ID: <87bkfdkbzo.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> <87wmy4lyol.fsf@dataswamp.org> <837cq2iyyw.fsf@gnu.org> <87zg2yu600.fsf@dataswamp.org> <838rahhl4s.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="40771"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:eurjenSUVeoOf6mMbenEZ+jOhQA= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 11 20:10:08 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 1qUWaN-000AJn-D0 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 11 Aug 2023 20:10:07 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qUWZt-00069W-Rb; Fri, 11 Aug 2023 14:09:38 -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 1qUR7e-0001KI-Sv for help-gnu-emacs@gnu.org; Fri, 11 Aug 2023 08:20:06 -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 1qUR7d-0005xW-3E for help-gnu-emacs@gnu.org; Fri, 11 Aug 2023 08:20:06 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1qUR7a-0009Xk-Pg for help-gnu-emacs@gnu.org; Fri, 11 Aug 2023 14:20:02 +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: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 11 Aug 2023 14:09:33 -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:144755 Archived-At: Eli Zaretskii wrote: > 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. > > So now please explain what you mean by "the state of > scrolling" and how would you determine that "scrolling does > not make any sense"? For example, in this very window I look at right now, the whole lower part of the buffer is displayed - it says "Bottom" in the mode bar - still I can scroll down even more, and - what Emacs calls scroll "up" BTW - by evaluating this (scroll-up 1) to just show more and more empty space. If we can find out from Elisp that we are already at the bottom, we wouldn't do that in a supposed wrapper function. I don't know how to find that out but if possible and anyone knows do tell as then I could write the function easily that I had in mind and show you. -- underground experts united https://dataswamp.org/~incal