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: Fri, 13 Jun 2014 17:47:59 +0300 Message-ID: <83ha3ox3vk.fsf@gnu.org> References: <831tuvz3n8.fsf@gnu.org> <83ha3qxbcc.fsf@gnu.org> <8361k5xra8.fsf@gnu.org> <83r42tvt0l.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1402670971 12322 80.91.229.3 (13 Jun 2014 14:49:31 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 13 Jun 2014 14:49:31 +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 Fri Jun 13 16:49:22 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 1WvSn6-0000LP-F4 for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 16:49:16 +0200 Original-Received: from localhost ([::1]:59515 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvSn5-0001Te-TS for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 10:49:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58842) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvSmx-0001Rq-OU for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 10:49:12 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WvSms-00015b-GD for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 10:49:07 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55621) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvSms-00015X-DV for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 10:49:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1WvSmr-00049h-TV for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 10:49:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 13 Jun 2014 14:49:01 +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=B17678.140267090915921 (code B ref 17678); Fri, 13 Jun 2014 14:49:01 +0000 Original-Received: (at 17678) by debbugs.gnu.org; 13 Jun 2014 14:48:29 +0000 Original-Received: from localhost ([127.0.0.1]:46771 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvSmH-00048f-8c for submit@debbugs.gnu.org; Fri, 13 Jun 2014 10:48:28 -0400 Original-Received: from mtaout27.012.net.il ([80.179.55.183]:41352) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvSm9-000486-NV for 17678@debbugs.gnu.org; Fri, 13 Jun 2014 10:48:21 -0400 Original-Received: from conversion-daemon.mtaout27.012.net.il by mtaout27.012.net.il (HyperSendmail v2007.08) id <0N7400K002X6H100@mtaout27.012.net.il> for 17678@debbugs.gnu.org; Fri, 13 Jun 2014 17:45:09 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout27.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N7400LUC3N9HS20@mtaout27.012.net.il>; Fri, 13 Jun 2014 17:45:09 +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:90339 Archived-At: > From: Stefan Monnier > Cc: esq@lawlist.com, 17678@debbugs.gnu.org > Date: Fri, 13 Jun 2014 10:14:03 -0400 > > > Not necessarily: there are the w->optional_new_start and > > w-> force_start flags, which determine what redisplay does with > > window-start in these cases. > > Also, the window-start could be set to a value that leaves point out > > of the displayed area, in which case it won't be in effect. > > Right, but these fall back into the case where redisplay performs > a second pass trough the window/buffer, so it's similar to the scrolling > case, right? Not necessarily, AFAIR. Sometimes these situations are detected and handled on the fly. > >> If OTOH redisplay decides to scroll, it won't re-execute > >> pre-redisplay-function, so Elisp doesn't get a chance to react to this > >> new window-start. > > ??? Then what are those calls to run_window_scroll_functions that > > redisplay issues? > > Ah, right, I forgot about this. So maybe window-scroll-functions is the > answer to the OP's needs! Or maybe we should call them in more places during redisplay.