From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Markus Triska Newsgroups: gmane.emacs.bugs Subject: bug#34038: 26.1; set-window-start sometimes fails to set window start Date: Fri, 29 Mar 2019 08:16:25 +0100 Message-ID: <87sgv640c6.fsf@metalevel.at> References: <83sgxzhe04.fsf@gnu.org> <87ef9je67i.fsf@metalevel.at> <20190111212357.GA5201@ACM> <87h8edt3kz.fsf@metalevel.at> <5C3AF974.1030906@gmx.at> <5029BB09-30CA-41BE-819D-E15101DCF38C@gnu.org> <5C3B3FCC.8080006@gmx.at> <83tviceg83.fsf@gnu.org> <87wokoa7c4.fsf@metalevel.at> <83ef6wnpvq.fsf@gnu.org> <874l7sxczx.fsf@metalevel.at> <83pnqbj7fi.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="102048"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Emacs/24.5 Cc: 34038@debbugs.gnu.org, acm@muc.de To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 29 08:28:12 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1h9lvu-000QN5-VP for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Mar 2019 08:28:11 +0100 Original-Received: from localhost ([127.0.0.1]:47837 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9lvt-0000nV-Ny for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Mar 2019 03:28:09 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:32784) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9lvi-0000dW-Qb for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 03:27:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h9llB-0000os-3r for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 03:17:05 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49692) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1h9ll8-0000oK-QR for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 03:17:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1h9ll8-00034W-Bq for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 03:17:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Markus Triska Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 29 Mar 2019 07:17:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 34038 X-GNU-PR-Package: emacs Original-Received: via spool by 34038-submit@debbugs.gnu.org id=B34038.155384378911734 (code B ref 34038); Fri, 29 Mar 2019 07:17:02 +0000 Original-Received: (at 34038) by debbugs.gnu.org; 29 Mar 2019 07:16:29 +0000 Original-Received: from localhost ([127.0.0.1]:35003 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1h9lka-00033B-KC for submit@debbugs.gnu.org; Fri, 29 Mar 2019 03:16:28 -0400 Original-Received: from metalevel.at ([78.46.218.83]:45312) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1h9lkY-000330-Jy for 34038@debbugs.gnu.org; Fri, 29 Mar 2019 03:16:27 -0400 Original-Received: by metalevel.at (Postfix, from userid 1000) id 67A45A03CB; Fri, 29 Mar 2019 08:16:25 +0100 (CET) In-Reply-To: <83pnqbj7fi.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 28 Mar 2019 18:21:53 +0200") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:156910 Archived-At: Eli Zaretskii writes: > Can you describe what you are trying to achieve by using > set-window-start? It's somewhat unusual to use that API without also > moving point accordingly. I noticed these issues in a larger application, primarily in an attempt to reliably and fully restore a previous window configuration. The key issue seems to be that point must be set correctly: If point is at a position that is known to be displayable with a given window-start, then if point is again set to that position, set-window-start will also reliably set window-start to that start. Is this correct? Personally, I would appreciate some comment regarding such a guarantee, or the assumptions, in the documentation of set-window-start.