From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier 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 08:34:59 -0400 Message-ID: References: <831tuvz3n8.fsf@gnu.org> <83ha3qxbcc.fsf@gnu.org> <8361k5xra8.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1402662991 9154 80.91.229.3 (13 Jun 2014 12:36:31 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 13 Jun 2014 12:36:31 +0000 (UTC) Cc: esq@lawlist.com, 17678@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jun 13 14:36:23 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 1WvQiV-0000qA-8q for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 14:36:23 +0200 Original-Received: from localhost ([::1]:58847 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvQiU-00012Z-SW for geb-bug-gnu-emacs@m.gmane.org; Fri, 13 Jun 2014 08:36:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56532) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvQiI-0000x8-NU for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 08:36:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WvQiA-0001Dn-B5 for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 08:36:10 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55125) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WvQiA-0001Dj-8x for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 08:36:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1WvQi9-00083X-Nx for bug-gnu-emacs@gnu.org; Fri, 13 Jun 2014 08:36:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 13 Jun 2014 12:36:01 +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=B17678.140266291930890 (code B ref 17678); Fri, 13 Jun 2014 12:36:01 +0000 Original-Received: (at 17678) by debbugs.gnu.org; 13 Jun 2014 12:35:19 +0000 Original-Received: from localhost ([127.0.0.1]:46275 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvQhO-000822-8m for submit@debbugs.gnu.org; Fri, 13 Jun 2014 08:35:18 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:1093) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WvQhH-00081R-6h for 17678@debbugs.gnu.org; Fri, 13 Jun 2014 08:35:12 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArYGAIDvNVNLd+D9/2dsb2JhbABZgwaDSr0vgw6BFxd0giUBAQEBAgFWIwULCzQHCxQYDSSIBAjSGReOegeEOASpGYFqgXGBWyE X-IPAS-Result: ArYGAIDvNVNLd+D9/2dsb2JhbABZgwaDSr0vgw6BFxd0giUBAQEBAgFWIwULCzQHCxQYDSSIBAjSGReOegeEOASpGYFqgXGBWyE X-IronPort-AV: E=Sophos;i="4.97,753,1389762000"; d="scan'208";a="66764987" Original-Received: from 75-119-224-253.dsl.teksavvy.com (HELO pastel.home) ([75.119.224.253]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 13 Jun 2014 08:35:00 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id C640260370; Fri, 13 Jun 2014 08:34:59 -0400 (EDT) In-Reply-To: <8361k5xra8.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 13 Jun 2014 09:22:23 +0300") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) 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:90322 Archived-At: >> 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. 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. > Anyway, one situation of the latter kind is when the text at > window-start changed. Another one is when the window-start was in a > continuation line, and the window width changed, see > compute_window_start_on_continuation_line and its callers. Ah, right, that makes sense. Stefan