From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: redisplay code + non-plain-text-only buffers + scroll-conservatively [Re: Bug: ruler-mode breaks scroll-conservatively (HEAD)] Date: Thu, 02 Jan 2003 13:39:26 -0500 Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: References: <15887.39112.118522.278925@hkn.eecs.berkeley.edu> <20021231103426.CA1B.LEKTU@terra.es> Reply-To: rms@gnu.org NNTP-Posting-Host: main.gmane.org X-Trace: main.gmane.org 1041541337 17315 80.91.224.249 (2 Jan 2003 21:02:17 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Thu, 2 Jan 2003 21:02:17 +0000 (UTC) Cc: quarl@quarl.org Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 18UCSi-0004Op-00 for ; Thu, 02 Jan 2003 22:01:08 +0100 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian)) id 18UCV0-0007xv-00 for ; Thu, 02 Jan 2003 22:03:30 +0100 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 18UAYV-0007Rp-01 for emacs-devel@quimby.gnus.org; Thu, 02 Jan 2003 13:58:59 -0500 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13) id 18UAVg-00071g-00 for emacs-devel@gnu.org; Thu, 02 Jan 2003 13:56:04 -0500 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13) id 18UAUX-0006ZI-00 for emacs-devel@gnu.org; Thu, 02 Jan 2003 13:54:55 -0500 Original-Received: from fencepost.gnu.org ([199.232.76.164]) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 18UAFb-0002Ht-00 for emacs-devel@gnu.org; Thu, 02 Jan 2003 13:39:27 -0500 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.10) id 18UAFa-0004Da-00; Thu, 02 Jan 2003 13:39:26 -0500 Original-To: lektu@terra.es In-reply-to: <20021231103426.CA1B.LEKTU@terra.es> (message from Juanma Barranquero on Tue, 31 Dec 2002 10:52:51 +0100) Original-cc: emacs-devel@gnu.org X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Emacs development discussions. List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:10416 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:10416 Still, there's a difference between scrolling down a buffer with partially visible lines and without. With full lines, if you maintain pressed, the scroll is totally smooth. With a partially-visible last line, the scroll "jumps" slightly every now and then (at more-or-less equally distributed intervals, apparently). That is going to be quite hard to debug, since it can't be reproduced and happens only occasionally in a series of many similar actions. The only technique I can think of is to insert debugging log output code in many places, and record all the output; then, when it fails, go back and find the log output for that failure and see how it differs from the usual log output. I can't afford to do this myself--I am overloaded. Would someone else like to do it? The place to start putting in the debugging printouts is in various places in the function try_scrolling.