From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: "... the window start at a meaningless point within a line." Date: Fri, 16 Oct 2015 20:35:15 +0300 Message-ID: <83a8ri67jg.fsf@gnu.org> References: <20150930204513.GA3174@acm.fritz.box> <83mvw39dp3.fsf@gnu.org> <20151001094138.GA2515@acm.fritz.box> <83h9maao7w.fsf@gnu.org> <20151001110204.GB2515@acm.fritz.box> <83egheaj9e.fsf@gnu.org> <20151015181642.GA6467@acm.fritz.box> <834mhr99e8.fsf@gnu.org> <20151016095535.GA2779@acm.fritz.box> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1445016937 3697 80.91.229.3 (16 Oct 2015 17:35:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 16 Oct 2015 17:35:37 +0000 (UTC) Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 16 19:35:29 2015 Return-path: Envelope-to: ged-emacs-devel@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 1Zn8ua-0001yk-42 for ged-emacs-devel@m.gmane.org; Fri, 16 Oct 2015 19:35:24 +0200 Original-Received: from localhost ([::1]:55155 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn8uY-0002dO-UQ for ged-emacs-devel@m.gmane.org; Fri, 16 Oct 2015 13:35:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45491) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn8uV-0002dJ-EE for emacs-devel@gnu.org; Fri, 16 Oct 2015 13:35:20 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zn8uQ-00036A-EB for emacs-devel@gnu.org; Fri, 16 Oct 2015 13:35:19 -0400 Original-Received: from mtaout27.012.net.il ([80.179.55.183]:57062) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn8uQ-00035y-6L for emacs-devel@gnu.org; Fri, 16 Oct 2015 13:35:14 -0400 Original-Received: from conversion-daemon.mtaout27.012.net.il by mtaout27.012.net.il (HyperSendmail v2007.08) id <0NWB00A00PK5SQ00@mtaout27.012.net.il> for emacs-devel@gnu.org; Fri, 16 Oct 2015 20:31:07 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout27.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NWB005FOPZVGH60@mtaout27.012.net.il>; Fri, 16 Oct 2015 20:31:07 +0300 (IDT) In-reply-to: <20151016095535.GA2779@acm.fritz.box> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.183 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:191781 Archived-At: > Date: Fri, 16 Oct 2015 09:55:35 +0000 > Cc: emacs-devel@gnu.org > From: Alan Mackenzie > > B---WS-----------------A---L2-------------A2---L3---------\nC-------C2--- > > When Fvertical_motion runs, it first sets its struct it "it" to a BOL, then > possibly moves it to the appropriate column. Between these two actions, > maybe_move_to_exact_bol reseats `it' from an xdisp BOL to an exact BOL, or > sometimes from a common BOL to an earlier or later BOL. But why do you need to do that? IOW, what problem does maybe_move_to_exact_bol solve, and how that problem is related to what Fvertical_motion does? Perhaps start by explaining what problems you discovered in Fvertical_motion that required you to make those changes. Thanks.