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: [schwab@suse.de: Display bug with miscomputed window-start] Date: Mon, 28 Oct 2002 22:02:11 -0500 Sender: emacs-devel-admin@gnu.org Message-ID: Reply-To: rms@gnu.org NNTP-Posting-Host: main.gmane.org X-Trace: main.gmane.org 1035860576 29049 80.91.224.249 (29 Oct 2002 03:02:56 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Tue, 29 Oct 2002 03:02:56 +0000 (UTC) Cc: emacs-devel@gnu.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 186MeZ-0007YD-00 for ; Tue, 29 Oct 2002 04:02:51 +0100 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian)) id 186Miz-0008Hj-00 for ; Tue, 29 Oct 2002 04:07:25 +0100 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10) id 186MfU-0006kn-00; Mon, 28 Oct 2002 22:03:48 -0500 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10) id 186Mdy-0006Fs-00 for emacs-devel@gnu.org; Mon, 28 Oct 2002 22:02:14 -0500 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10) id 186Mdw-0006Fa-00 for emacs-devel@gnu.org; Mon, 28 Oct 2002 22:02:13 -0500 Original-Received: from fencepost.gnu.org ([199.232.76.164]) by monty-python.gnu.org with esmtp (Exim 4.10) id 186Mdv-0006FU-00 for emacs-devel@gnu.org; Mon, 28 Oct 2002 22:02:11 -0500 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.10) id 186Mdv-0007EB-00; Mon, 28 Oct 2002 22:02:11 -0500 Original-To: gerd@gnu.org Errors-To: emacs-devel-admin@gnu.org X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.0.11 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: Emacs development discussions. List-Unsubscribe: , List-Archive: Xref: main.gmane.org gmane.emacs.devel:8869 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:8869 Since this is in redisplay, could you look at it? ------- Start of forwarded message ------- Envelope-to: rms@gnu.org Delivery-date: Mon, 28 Oct 2002 11:54:08 -0500 X-Authentication-Warning: sykes.suse.de: schwab set sender to schwab@suse.de using -f To: emacs-devel@gnu.org Subject: Display bug with miscomputed window-start X-Yow: I don't think you fellows would do so much RAPING and PILLAGING if you played more PINBALL and watched CABLE TELEVISION!! From: Andreas Schwab Sender: emacs-devel-admin@gnu.org Date: Mon, 28 Oct 2002 17:48:49 +0100 Redisplay does not correctly handle characters that wrap around at the right margin. To reproduce: - - Insert a bunch of ^A (C-q C-a) in a buffer so that the line wraps around - - Go to point-min - - If there is an even number of columns insert a space, so that the last ^A in the line wraps around, i.e the ^ is in the last column and the A appears at the start of the next screen line. - - Do M-1 C-v (scroll-up 1) The cursor will now be somewhere in the middle of the window, maybe not even inside any buffer text. Now click on first visible ^A to move point there and evaluate (list (point) (window-start)). You will get two different numbers that are off by one (`(42 41)' for an 80 column display). Note that if you change the character that wraps around to a TAB this bug does not occur. Andreas. - -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." _______________________________________________ Emacs-devel mailing list Emacs-devel@gnu.org http://mail.gnu.org/mailman/listinfo/emacs-devel ------- End of forwarded message -------