From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#34038: 26.1; set-window-start sometimes fails to set window start Date: Fri, 29 Mar 2019 11:29:43 +0300 Message-ID: <83d0majd6w.fsf@gnu.org> 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> <87sgv640c6.fsf@metalevel.at> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="100221"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 34038@debbugs.gnu.org, acm@muc.de To: Markus Triska Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 29 09:30:15 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 1h9mtx-000Pvc-Qm for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Mar 2019 09:30:13 +0100 Original-Received: from localhost ([127.0.0.1]:48491 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9mtw-0008En-OB for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Mar 2019 04:30:12 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:44151) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9mtr-0008Eh-8F for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 04:30:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h9mtp-0004D6-Og for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 04:30:07 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49710) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1h9mto-0004CO-0G for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 04:30:05 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1h9mtn-0005Du-LC for bug-gnu-emacs@gnu.org; Fri, 29 Mar 2019 04:30:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 29 Mar 2019 08:30:03 +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=B34038.155384820120044 (code B ref 34038); Fri, 29 Mar 2019 08:30:03 +0000 Original-Received: (at 34038) by debbugs.gnu.org; 29 Mar 2019 08:30:01 +0000 Original-Received: from localhost ([127.0.0.1]:35021 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1h9mtl-0005DD-DZ for submit@debbugs.gnu.org; Fri, 29 Mar 2019 04:30:01 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:57945) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1h9mtj-0005Cy-0k for 34038@debbugs.gnu.org; Fri, 29 Mar 2019 04:30:00 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:53451) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9mtY-00043S-Px; Fri, 29 Mar 2019 04:29:49 -0400 Original-Received: from [176.228.60.248] (port=2436 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1h9mtS-0007UJ-Et; Fri, 29 Mar 2019 04:29:47 -0400 In-reply-to: <87sgv640c6.fsf@metalevel.at> (message from Markus Triska on Fri, 29 Mar 2019 08:16:25 +0100) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:156912 Archived-At: > From: Markus Triska > Cc: rudalics@gmx.at, acm@muc.de, 34038@debbugs.gnu.org > Date: Fri, 29 Mar 2019 08:16:25 +0100 > > 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? Yes. In fact, that's how set-window-start was intended to work to begin with: for applications that put point at certain location, and also want to control where the window display will start on next redisplay. Scrolling commands behave that way, for example. > Personally, I would appreciate some comment regarding such a guarantee, > or the assumptions, in the documentation of set-window-start. OK, I will add something to that effect, thanks for pointing this out.