From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Kenichi Handa Newsgroups: gmane.emacs.bugs Subject: bug#3452: 23.0.94; display Date: Mon, 08 Jun 2009 17:10:27 +0900 Message-ID: References: <877hzoogc1.fsf@cyd.mit.edu> Reply-To: Kenichi Handa , 3452@emacsbugs.donarmstrong.com NNTP-Posting-Host: lo.gmane.org X-Trace: ger.gmane.org 1244449058 13127 80.91.229.12 (8 Jun 2009 08:17:38 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 8 Jun 2009 08:17:38 +0000 (UTC) Cc: 3452@emacsbugs.donarmstrong.com, cyd@stupidchicken.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Jun 08 10:17:35 2009 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MDa2w-00057H-QX for geb-bug-gnu-emacs@m.gmane.org; Mon, 08 Jun 2009 10:17:35 +0200 Original-Received: from localhost ([127.0.0.1]:40761 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MDa2v-00029m-Kt for geb-bug-gnu-emacs@m.gmane.org; Mon, 08 Jun 2009 04:17:33 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MDa2p-000263-9f for bug-gnu-emacs@gnu.org; Mon, 08 Jun 2009 04:17:27 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MDa2k-0001x3-R2 for bug-gnu-emacs@gnu.org; Mon, 08 Jun 2009 04:17:26 -0400 Original-Received: from [199.232.76.173] (port=44124 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MDa2k-0001wW-Ie for bug-gnu-emacs@gnu.org; Mon, 08 Jun 2009 04:17:22 -0400 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:50700) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MDa2k-0001OR-3y for bug-gnu-emacs@gnu.org; Mon, 08 Jun 2009 04:17:22 -0400 Original-Received: from rzlab.ucr.edu (rzlab.ucr.edu [127.0.0.1]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id n588HJPv008878; Mon, 8 Jun 2009 01:17:19 -0700 Original-Received: (from debbugs@localhost) by rzlab.ucr.edu (8.14.3/8.14.3/Submit) id n588F3r5008184; Mon, 8 Jun 2009 01:15:03 -0700 X-Loop: owner@emacsbugs.donarmstrong.com Resent-From: Kenichi Handa Resent-To: bug-submit-list@donarmstrong.com Resent-CC: Emacs Bugs Resent-Date: Mon, 08 Jun 2009 08:15:03 +0000 Resent-Message-ID: Resent-Sender: owner@emacsbugs.donarmstrong.com X-Emacs-PR-Message: followup 3452 X-Emacs-PR-Package: emacs X-Emacs-PR-Keywords: Original-Received: via spool by 3452-submit@emacsbugs.donarmstrong.com id=B3452.12444486368026 (code B ref 3452); Mon, 08 Jun 2009 08:15:03 +0000 Original-Received: (at 3452) by emacsbugs.donarmstrong.com; 8 Jun 2009 08:10:36 +0000 X-Spam-Bayes: score:0.5 Bayes not run. spammytokens:Tokens not available. hammytokens:Tokens not available. Original-Received: from mx1.aist.go.jp (mx1.aist.go.jp [150.29.246.133]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id n588ATVk008018 for <3452@emacsbugs.donarmstrong.com>; Mon, 8 Jun 2009 01:10:31 -0700 Original-Received: from rqsmtp2.aist.go.jp (rqsmtp2.aist.go.jp [150.29.254.123]) by mx1.aist.go.jp with ESMTP id n588ASgn005070; Mon, 8 Jun 2009 17:10:28 +0900 (JST) env-from (handa@m17n.org) Original-Received: from smtp2.aist.go.jp by rqsmtp2.aist.go.jp with ESMTP id n588ASu8018615; Mon, 8 Jun 2009 17:10:28 +0900 (JST) env-from (handa@m17n.org) Original-Received: by smtp2.aist.go.jp with ESMTP id n588ARO5017662; Mon, 8 Jun 2009 17:10:27 +0900 (JST) env-from (handa@m17n.org) Original-Received: from handa by etlken with local (Exim 4.69) (envelope-from ) id 1MDZw3-0002b5-Gq; Mon, 08 Jun 2009 17:10:27 +0900 In-reply-to: (message from Eli Zaretskii on Mon, 08 Jun 2009 00:48:53 -0400) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 2) Resent-Date: Mon, 08 Jun 2009 04:17:26 -0400 X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:28549 Archived-At: In article , Eli Zaretskii writes: > > On terminal, if a zero-width character doesn't follow a base > > character, Emacs composes that character by prepending SPACE > > hoping that the terminal treats that zero-width character as > > zero-width too. > So these characters should be currently displayed as SPACE? Yes, that's my intention. > Is it a good idea to rely on the terminal in this situation? Do we > know for a fact that many (most?) terminals indeed behave like that > with zero-width characters? I'm not sure but I thought that it's reasonable to assume that a character defined as zero-width by Unicode does not occupy a screen column by itself. Not for U+202D, but such combining characters as U+0300 are treated correctly by xterm (not by gnome-terminal). > > To conclude, I think there's not that much we can do for > > this situation. I think the current behaviour of > > gnome-terminal (displaying standalone U+202D as a space of > > width 1) is a bug. > If other terminals behave correctly, I would agree. But if not, > perhaps we need to work around this, if possible. For example, we > could have an entry in display tables for these characters. It seems xterm, gnome-terminal, GNU/Linux console, and mlterm treat U+202D as spacing character, but, Konsole (KDE's terminal) and kterm treats it as non-spacing character. --- Kenichi Handa handa@m17n.org