From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#17678: 24.4.50; Feature Request -- calculate new `window-start` & `window-end` before visual redisplay Date: Thu, 12 Jun 2014 20:54:27 +0300 Message-ID: <83ha3qxbcc.fsf@gnu.org> References: <831tuvz3n8.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1402595724 17316 80.91.229.3 (12 Jun 2014 17:55:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 12 Jun 2014 17:55:24 +0000 (UTC) Cc: esq@lawlist.com, 17678@debbugs.gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Jun 12 19:55:16 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Wv9DY-00082s-A7 for geb-bug-gnu-emacs@m.gmane.org; Thu, 12 Jun 2014 19:55:16 +0200 Original-Received: from localhost ([::1]:55077 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wv9DX-0007aG-Tc for geb-bug-gnu-emacs@m.gmane.org; Thu, 12 Jun 2014 13:55:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60167) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wv9DQ-0007WB-0q for bug-gnu-emacs@gnu.org; Thu, 12 Jun 2014 13:55:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wv9DK-0007CW-PH for bug-gnu-emacs@gnu.org; Thu, 12 Jun 2014 13:55:07 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54681) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wv9DK-0007BV-LH for bug-gnu-emacs@gnu.org; Thu, 12 Jun 2014 13:55:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Wv9DK-0002ob-1p for bug-gnu-emacs@gnu.org; Thu, 12 Jun 2014 13:55:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 12 Jun 2014 17:55:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 17678 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 17678-submit@debbugs.gnu.org id=B17678.140259569110795 (code B ref 17678); Thu, 12 Jun 2014 17:55:01 +0000 Original-Received: (at 17678) by debbugs.gnu.org; 12 Jun 2014 17:54:51 +0000 Original-Received: from localhost ([127.0.0.1]:45831 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wv9D9-0002o3-0Z for submit@debbugs.gnu.org; Thu, 12 Jun 2014 13:54:51 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:43289) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wv9D5-0002nj-QW for 17678@debbugs.gnu.org; Thu, 12 Jun 2014 13:54:49 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0N7200D00HQN8M00@a-mtaout21.012.net.il> for 17678@debbugs.gnu.org; Thu, 12 Jun 2014 20:54:40 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N7200DKWHR43B60@a-mtaout21.012.net.il>; Thu, 12 Jun 2014 20:54:40 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:90296 Archived-At: > From: Stefan Monnier > Cc: esq@lawlist.com, 17678@debbugs.gnu.org > Date: Wed, 11 Jun 2014 17:58:11 -0400 > > > The display engine changes window-start for several reasons, only one > > of them being that point moved off screen. > > Is there a comment somewhere that documents the cases where it can happen? Not that I know of. In general, there are functions that set the window-start forcibly. > > I think follow-mode also needs to know when the window-end changes > > (which could happen with no changes in window-start). This is > > normally known only at the end of window redisplay, IIRC. > > In the case of follow-mode, I think the best way to handle that is to > make it possible for follow-mode to force redisplay to go through the > windows in a particular order. That'd require some infrastructure that doesn't exist.