From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#20180: Missing documentation about redisplay. Date: Mon, 23 Mar 2015 16:08:50 +0000 Message-ID: <20150323160850.GA23576@acm.fritz.box> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1427127470 13381 80.91.229.3 (23 Mar 2015 16:17:50 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 23 Mar 2015 16:17:50 +0000 (UTC) To: 20180@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Mar 23 17:17:38 2015 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 1Ya52k-0007kP-En for geb-bug-gnu-emacs@m.gmane.org; Mon, 23 Mar 2015 17:17:35 +0100 Original-Received: from localhost ([::1]:56954 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya52j-0006Bc-Hf for geb-bug-gnu-emacs@m.gmane.org; Mon, 23 Mar 2015 12:17:33 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39717) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya52K-0005k9-Hx for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:17:16 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ya52E-00079T-OA for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:17:08 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:44247) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya52E-00079P-Lg for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:17:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Ya52E-0003Q5-Cd for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:17:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 23 Mar 2015 16:17:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 20180 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.142712737513085 (code B ref -1); Mon, 23 Mar 2015 16:17:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 23 Mar 2015 16:16:15 +0000 Original-Received: from localhost ([127.0.0.1]:34023 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Ya51T-0003Oz-Dt for submit@debbugs.gnu.org; Mon, 23 Mar 2015 12:16:15 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:37798) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Ya51Q-0003Om-MK for submit@debbugs.gnu.org; Mon, 23 Mar 2015 12:16:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ya51H-00072b-7g for submit@debbugs.gnu.org; Mon, 23 Mar 2015 12:16:07 -0400 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:33882) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya51H-00072W-4r for submit@debbugs.gnu.org; Mon, 23 Mar 2015 12:16:03 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39482) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya51D-0005DC-2X for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:16:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ya517-0006zz-Cr for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:15:59 -0400 Original-Received: from colin.muc.de ([193.149.48.1]:26858 helo=mail.muc.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya517-0006zC-5g for bug-gnu-emacs@gnu.org; Mon, 23 Mar 2015 12:15:53 -0400 Original-Received: (qmail 10152 invoked by uid 3782); 23 Mar 2015 16:09:07 -0000 Original-Received: from acm.muc.de (pD95199EB.dip0.t-ipconnect.de [217.81.153.235]) by colin.muc.de (tmda-ofmipd) with ESMTP; Mon, 23 Mar 2015 17:09:06 +0100 Original-Received: (qmail 23629 invoked by uid 1000); 23 Mar 2015 16:08:50 -0000 Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-Delivery-Agent: TMDA/1.1.12 (Macallan) X-Primary-Address: acm@muc.de X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). 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:100841 Archived-At: Hello, Emacs. The elisp manual doesn't contain adequate documentation about (re)display. The topics not covered include 1. What triggers redisplay. 2. What portions of the frame/all frames get redisplayed when a redisplay occurs, and how does this relate to the answer to 1.. There is a partial answer to 1. on the page "Forcing Redisplay" which states that "Emacs normally tries to redisplay the screen whenever it waits for input.", but this is clearly incomplete - redisplay also happens in the absence of input (e.g. by context fontification). One clearly needs an answer to 2. if one ever wants to cause the redisplay of a particular part of a window or frame. -- Alan Mackenzie (Nuremberg, Germany).