From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#20173: 24.4; Rendering misallocates combining marks on ligatures Date: Fri, 27 Mar 2015 12:54:22 +0300 Message-ID: <83619mbwa9.fsf@gnu.org> References: <20150323010626.530d3395@JRWUBU2> <83wq27raer.fsf@gnu.org> <20150323224107.4532b1cc@JRWUBU2> <837fu7qcx1.fsf@gnu.org> <20150324082828.6bad0649@JRWUBU2> <834mpaqqdx.fsf@gnu.org> <20150327090444.322e6639@JRWUBU2> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1427450649 11951 80.91.229.3 (27 Mar 2015 10:04:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 27 Mar 2015 10:04:09 +0000 (UTC) Cc: 20173@debbugs.gnu.org To: Richard Wordingham Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 27 11:03:59 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YbR79-0003fV-6s for geb-bug-gnu-emacs@m.gmane.org; Fri, 27 Mar 2015 11:03:43 +0100 Original-Received: from localhost ([::1]:49212 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YbR78-0004te-JP for geb-bug-gnu-emacs@m.gmane.org; Fri, 27 Mar 2015 06:03:42 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:32912) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YbR71-0004tD-5L for bug-gnu-emacs@gnu.org; Fri, 27 Mar 2015 06:03:39 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YbR6w-0004L9-U7 for bug-gnu-emacs@gnu.org; Fri, 27 Mar 2015 06:03:35 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:48051) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YbQyl-0001DU-9f for bug-gnu-emacs@gnu.org; Fri, 27 Mar 2015 05:55:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1YbQyl-0007O7-1Y for bug-gnu-emacs@gnu.org; Fri, 27 Mar 2015 05:55:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 27 Mar 2015 09:55:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20173 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 20173-submit@debbugs.gnu.org id=B20173.142745007428360 (code B ref 20173); Fri, 27 Mar 2015 09:55:02 +0000 Original-Received: (at 20173) by debbugs.gnu.org; 27 Mar 2015 09:54:34 +0000 Original-Received: from localhost ([127.0.0.1]:37827 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YbQyH-0007NM-KV for submit@debbugs.gnu.org; Fri, 27 Mar 2015 05:54:33 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:53164) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YbQyF-0007N8-6H for 20173@debbugs.gnu.org; Fri, 27 Mar 2015 05:54:32 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0NLV00H0078SRQ00@a-mtaout20.012.net.il> for 20173@debbugs.gnu.org; Fri, 27 Mar 2015 12:54:24 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NLV00HZE7IOKFB0@a-mtaout20.012.net.il>; Fri, 27 Mar 2015 12:54:24 +0300 (IDT) In-reply-to: <20150327090444.322e6639@JRWUBU2> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:100973 Archived-At: > Date: Fri, 27 Mar 2015 09:04:44 +0000 > From: Richard Wordingham > Cc: 20173@debbugs.gnu.org > > On Tue, 24 Mar 2015 19:03:38 +0200 > Eli Zaretskii wrote: > > > > Date: Tue, 24 Mar 2015 08:28:28 +0000 > > > From: Richard Wordingham > > > Cc: 20173@debbugs.gnu.org > > > > You might want to first check whether composed Arabic is > > > usable. Doesn't making each word a grapheme cluster makes editing > > > unpleasant? > > > I don't know; I don't speak or write any of the languages that use the > > Arabic script. I expect the users that do to come up and ask for > > features they miss. We already allow deletion of single codepoints, > > even when they are composed; we might as well provide similar features > > for movement or whatever. > > I forgot that grapheme clustering is done in m17n, not Emacs itself. > The m17n code (in ARAB-OTF.flt) is reasonable - it clusters letters > with combining marks. It *seems* I have a problem with tpu-forward-char > and tpu-backward-char; it's as though there's an initialisation fault > which stops them stepping through the Arabic compositions at first. It > may be an issue with the presumably underlying forward-char and > backward-char; I haven't investigated further. I'll have to record > the exact actions provoking the problem before I formally record a bug. Please try in "emacs -Q" without activating the TPU emulation.