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: The unwarranted scrolling assumption Date: Fri, 18 Jun 2010 10:39:57 +0300 Message-ID: <83aaqsiyb6.fsf@gnu.org> References: <87ocfcj7r4.fsf@mail.jurta.org> <87631jvpzg.fsf@gmail.com> <4C18211C.3070106@harpegolden.net> <87vd9j5neu.fsf@kfs-lx.rd.rdm> <83sk4misf2.fsf@gnu.org> <83iq5hiiin.fsf@gnu.org> <83fx0lihov.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1276846850 21562 80.91.229.12 (18 Jun 2010 07:40:50 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 18 Jun 2010 07:40:50 +0000 (UTC) Cc: emacs-devel@gnu.org To: Lennart Borgman Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jun 18 09:40:45 2010 connect(): No such file or directory Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OPWBw-0003fW-Qt for ged-emacs-devel@m.gmane.org; Fri, 18 Jun 2010 09:40:45 +0200 Original-Received: from localhost ([127.0.0.1]:42274 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OPWBw-0004WE-1Q for ged-emacs-devel@m.gmane.org; Fri, 18 Jun 2010 03:40:44 -0400 Original-Received: from [140.186.70.92] (port=53797 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OPWBp-0004Sl-Ng for emacs-devel@gnu.org; Fri, 18 Jun 2010 03:40:38 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OPWBo-0000Bz-OK for emacs-devel@gnu.org; Fri, 18 Jun 2010 03:40:37 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:48881) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OPWBo-0000Bu-HK for emacs-devel@gnu.org; Fri, 18 Jun 2010 03:40:36 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0L4700K0099A6900@a-mtaout22.012.net.il> for emacs-devel@gnu.org; Fri, 18 Jun 2010 10:39:52 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([77.127.88.125]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0L4700A619AFIQR0@a-mtaout22.012.net.il>; Fri, 18 Jun 2010 10:39:52 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:126130 Archived-At: > From: Lennart Borgman > Date: Thu, 17 Jun 2010 21:35:51 +0200 > Cc: emacs-devel@gnu.org > > > What parts of the above condition prevented > > reconsider_clip_changes from resetting b->clip_changed to zero? > > Sorry, I thought I did tell that, but maybe I deleted that from some message. > > It is !NILP (w->window_end_valid). ??? How can this be? The code says: if (b->clip_changed && !NILP (w->window_end_valid) && w->current_matrix->buffer == b && w->current_matrix->zv == BUF_ZV (b) && w->current_matrix->begv == BUF_BEGV (b)) b->clip_changed = 0; So if w->window_end_valid is non-nil, this code should reset b->clip_changed to zero. And you say it does _not_ reset it to zero. So what prevents b->clip_changed from being reset to zero? > But it is not this that normally gives the "jumping scrolling". I am > not sure it is a problem at all. Then what _is_ the problem?