From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Keith David Bershatsky Newsgroups: gmane.emacs.devel Subject: Re: Test to determine character left-overhangs a tab stretch. Date: Wed, 14 Nov 2018 10:25:28 -0800 Message-ID: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Trace: blaine.gmane.org 1542219863 16086 195.159.176.226 (14 Nov 2018 18:24:23 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 14 Nov 2018 18:24:23 +0000 (UTC) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Nov 14 19:24:19 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gMzpq-00044l-JL for ged-emacs-devel@m.gmane.org; Wed, 14 Nov 2018 19:24:19 +0100 Original-Received: from localhost ([::1]:33697 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gMzrw-0002L8-Km for ged-emacs-devel@m.gmane.org; Wed, 14 Nov 2018 13:26:28 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53240) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gMzrN-0002Kw-Il for emacs-devel@gnu.org; Wed, 14 Nov 2018 13:25:54 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gMzrI-00068n-J3 for emacs-devel@gnu.org; Wed, 14 Nov 2018 13:25:53 -0500 Original-Received: from gateway32.websitewelcome.com ([192.185.145.123]:19717) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gMzrE-0005tR-2q for emacs-devel@gnu.org; Wed, 14 Nov 2018 13:25:46 -0500 Original-Received: from cm14.websitewelcome.com (cm14.websitewelcome.com [100.42.49.7]) by gateway32.websitewelcome.com (Postfix) with ESMTP id 24A9E5732 for ; Wed, 14 Nov 2018 12:25:30 -0600 (CST) Original-Received: from gator3053.hostgator.com ([50.87.144.69]) by cmsmtp with SMTP id MzqzgqKVgkBj6MzqzgpIPk; Wed, 14 Nov 2018 12:25:30 -0600 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lawlist.com ; s=default; h=Content-Type:MIME-Version:Subject:Cc:To:From:Message-ID:Date: Sender:Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=2icxiYyckhArThcqMLXzYT1IQK6wGC90iywOThv5jPY=; b=jLi/0DehmOhedFcN5LN5qbaEMe 9vWTLZj6TRPqVACCsgInZOzyh6bvIRr2JrRiYsHf7z4f2miITo9qNU8X9AqEjHEvsqjaxphmrO1Y0 Dm2ZO1UwCETQI3JVhlooh2xjJSmmj7jIebSUXEIPUKF125xUPQ+DUY3lzKBNRXxv5NUq2xYUrJUKf KdlUu0RRcTcqHsVXjgmFvDaS5N4Vs+5RZI34lSFvU5yCjdv3ip2SJuxvihH7nLC/f4XwqRphUbP4C oEsmsB4Wv4sLqG5EnuJZemOwrpEjL8Sd8hDAJ0/1Av4Pfc3EyvmHJbbDwervT/q0sRD9rZo9/Gmn/ p4VFAkOw==; Original-Received: from cpe-45-48-239-195.socal.res.rr.com ([45.48.239.195]:49941 helo=server.local) by gator3053.hostgator.com with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.91) (envelope-from ) id 1gMzqz-003SAV-BR; Wed, 14 Nov 2018 12:25:29 -0600 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator3053.hostgator.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lawlist.com X-BWhitelist: no X-Source-IP: 45.48.239.195 X-Source-L: No X-Exim-ID: 1gMzqz-003SAV-BR X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: cpe-45-48-239-195.socal.res.rr.com (server.local) [45.48.239.195]:49941 X-Source-Auth: lawlist X-Email-Count: 1 X-Source-Cap: bGF3bGlzdDtsYXdsaXN0O2dhdG9yMzA1My5ob3N0Z2F0b3IuY29t X-Local-Domain: yes X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 192.185.145.123 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:231144 Archived-At: Thank you very much for solving the mystery as to the segfault -- greatly appreciated!!! I agree that merely skipping over that section of code in this situation is not a good idea. Now that a reliable test exists, I can begin working on devising a method to redraw the fake cursors along the tab stretch after it gets drawn anew. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > Date: [11-14-2018 07:33:56] <14 Nov 2018 17:33:56 +0200> > From: Eli Zaretskii > To: Keith David Bershatsky > CC: emacs-devel@gnu.org > Subject: Re: Test to determine character left-overhangs a tab stretch. > > * * * > > Stepping back, I'm not sure what you do is a good idea. Redrawing > neighboring glyphs due to overhanging is done for a reason, so > skipping it might well produce incorrect display. I advice against > that.