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: redisplay-dont-pause Date: Fri, 16 Sep 2011 20:45:15 +0300 Message-ID: <83aaa4v0t0.fsf@gnu.org> References: <83ipovw2z2.fsf@gnu.org> <83obyluf08.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1316195192 4923 80.91.229.12 (16 Sep 2011 17:46:32 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 16 Sep 2011 17:46:32 +0000 (UTC) Cc: emacs-devel@gnu.org To: rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Sep 16 19:46:25 2011 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1R4cUa-0007zZ-Bv for ged-emacs-devel@m.gmane.org; Fri, 16 Sep 2011 19:46:24 +0200 Original-Received: from localhost ([::1]:41256 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R4cUZ-0006Lo-LD for ged-emacs-devel@m.gmane.org; Fri, 16 Sep 2011 13:46:23 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:37932) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R4cUX-0006LW-4F for emacs-devel@gnu.org; Fri, 16 Sep 2011 13:46:21 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1R4cUW-0000wr-5r for emacs-devel@gnu.org; Fri, 16 Sep 2011 13:46:21 -0400 Original-Received: from mtaout23.012.net.il ([80.179.55.175]:43670) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R4cUV-0000wj-Vp; Fri, 16 Sep 2011 13:46:20 -0400 Original-Received: from conversion-daemon.a-mtaout23.012.net.il by a-mtaout23.012.net.il (HyperSendmail v2007.08) id <0LRM00900MNU0M00@a-mtaout23.012.net.il>; Fri, 16 Sep 2011 20:46:18 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([77.126.9.62]) by a-mtaout23.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0LRM00HOKMP5AEA0@a-mtaout23.012.net.il>; Fri, 16 Sep 2011 20:46:18 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-Received-From: 80.179.55.175 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:144070 Archived-At: > Date: Fri, 16 Sep 2011 13:29:42 -0400 > From: Richard Stallman > CC: emacs-devel@gnu.org > > Because the optimizations rely on the display being up to date, which > cannot be assured if redisplay was aborted half way through. > > There is no reason in principle that it can't be assured. > The display code I wrote assured the integrity of the records, > even when it stopped having updated only some of the lines. > And the multi-font display code in Emacs 19 did so too. Perhaps if you describe the design of how the old display engine kept records about up-to-dateness of display portions, we could see if the same design principles can be used with the current display engine, and maybe implement such a feature.