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 16:27:54 +0300 Message-ID: <83r42tvt0l.fsf@gnu.org> References: <831tuvz3n8.fsf@gnu.org> <83ha3qxbcc.fsf@gnu.org> <8361k5xra8.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1402666165 16502 80.91.229.3 (13 Jun 2014 13:29:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 13 Jun 2014 13:29:25 +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 15:29:18 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 1WvRXh-0001tJ-P9 for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 15:29:17 +0200 Original-Received: from localhost ([::1]:59085 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvRXh-0004Nv-DS for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 09:29:17 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40493) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvRXY-0004Gw-U2 for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 09:29:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WvRXS-0004vJ-SF for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 09:29:08 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55155) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvRXS-0004vF-Pl for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 09:29:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1WvRXS-0001Pe-0Q for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 09:29:02 -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 13:29:01 +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=B17678.14026660975359 (code B ref 17678); Fri, 13 Jun 2014 13:29:01 +0000 Original-Received: (at 17678) by debbugs.gnu.org; 13 Jun 2014 13:28:17 +0000 Original-Received: from localhost ([127.0.0.1]:46303 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvRWi-0001OK-PD for submit@debbugs.gnu.org; Fri, 13 Jun 2014 09:28:17 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:35574) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvRWe-0001Nw-IC for 17678@debbugs.gnu.org; Fri, 13 Jun 2014 09:28:13 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0N7300600ZWNU900@a-mtaout20.012.net.il> for 17678@debbugs.gnu.org; Fri, 13 Jun 2014 16:28:05 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N74006YD02TDT80@a-mtaout20.012.net.il>; Fri, 13 Jun 2014 16:28:05 +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:90328 Archived-At: > From: Stefan Monnier > Cc: esq@lawlist.com, 17678@debbugs.gnu.org > Date: Fri, 13 Jun 2014 08:34:59 -0400 > > >> I know of code that does that from outside of redisplay, but within > >> redisplay I only know of the "move point back into view". > > Why does it matter if the trigger comes from outside redisplay or as > > part of redisplay? > > If it's done outside of redisplay, then pre-redisplay-function already > gets the right window-start and the problem is already solved. 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. > 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?