From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: "Basil L. Contovounesios" Newsgroups: gmane.emacs.bugs Subject: bug#35721: 27.0.50; Strange Arabic shaping behavior Date: Mon, 20 May 2019 20:07:55 +0100 Message-ID: <87v9y5q704.fsf@tcd.ie> References: <87h89ycpnw.fsf@tcd.ie> <83mujp9in8.fsf@gnu.org> <83d0kkao99.fsf@gnu.org> <83v9yacyvp.fsf@gnu.org> <20190516134508.GH1802@macbook.localdomain> <83imuacx00.fsf@gnu.org> <20190516142000.GI1802@macbook.localdomain> <83bm02cvp3.fsf@gnu.org> <87y336ce8d.fsf@tcd.ie> <83woipbnih.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="118920"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: dr.khaled.hosny@gmail.com, behdad@behdad.org, 35721@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon May 20 21:09:14 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hSneq-000Un0-RL for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 May 2019 21:09:12 +0200 Original-Received: from localhost ([127.0.0.1]:40680 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hSnep-0001BY-PM for geb-bug-gnu-emacs@m.gmane.org; Mon, 20 May 2019 15:09:11 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:57514) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hSnei-0001AE-N4 for bug-gnu-emacs@gnu.org; Mon, 20 May 2019 15:09:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hSneg-0000KX-Sy for bug-gnu-emacs@gnu.org; Mon, 20 May 2019 15:09:04 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:52615) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hSneg-0000KD-N9 for bug-gnu-emacs@gnu.org; Mon, 20 May 2019 15:09:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1hSneg-0004rd-GA for bug-gnu-emacs@gnu.org; Mon, 20 May 2019 15:09:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Basil L. Contovounesios" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 20 May 2019 19:09:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 35721 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: notabug Original-Received: via spool by 35721-submit@debbugs.gnu.org id=B35721.155837928618617 (code B ref 35721); Mon, 20 May 2019 19:09:02 +0000 Original-Received: (at 35721) by debbugs.gnu.org; 20 May 2019 19:08:06 +0000 Original-Received: from localhost ([127.0.0.1]:37924 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hSndl-0004q9-VN for submit@debbugs.gnu.org; Mon, 20 May 2019 15:08:06 -0400 Original-Received: from mail-ed1-f65.google.com ([209.85.208.65]:38019) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hSndj-0004p3-Bs for 35721@debbugs.gnu.org; Mon, 20 May 2019 15:08:03 -0400 Original-Received: by mail-ed1-f65.google.com with SMTP id w11so25404654edl.5 for <35721@debbugs.gnu.org>; Mon, 20 May 2019 12:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tcd-ie.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:references:date:in-reply-to:message-id :user-agent:mime-version; bh=itT6wnxJk2ttsCUtkHDURkSgU0M849JKUfwqw4fquxk=; b=u8L/UNgnZdRJcmU+AbncAVdcbHUsApYJtSSYkFHgrX6xdiqJH9ssvTRJByquVTsGiL +Ml6HKzwwr+supdUtVs+J67jl+GXjZQnqamJlubhE8BC9ifk90kUEUT3dSFhiK8LBhFC dpdqipL1A0lX/vHa130/hm8k8rEs1PSJybtug3+zqnvskvWy8SgiLcOWebKtRgM3W4uP uEqa48DkxMVPAUt7OaIG4ulcCnS3TV8GBG4sEKbuaKH6KaQPRmBhnoTx7kQO73xrBNdq HSUXKdaRkD0rN0aX/j8OI361f8KvtYiKjR2dl0T45FBoap7F8vNfD8fsolEt2XZx8FPt EuZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:references:date:in-reply-to :message-id:user-agent:mime-version; bh=itT6wnxJk2ttsCUtkHDURkSgU0M849JKUfwqw4fquxk=; b=J/bJFet+jlKd6AdLHLw1ekZfyVkke7XV4qEQMUwFN1OkrCeEmdtLXBGdMOY2WpP44B 997E5JFlxMOvUaEYP8swD6+/eDQhl+hgaPHOh8zO1P9w4K+2rM+PRRP9SrKBIhu00xYe SR5qGnYL+mV/nQX8uSDV2qZ9JIeYzeqnxAlKxenJpRSQW39U72L9uhEeU4BTjkO/KGaE gxC8fV+qspfSRElY5AsCdxWex+B7kx9ALPFWLw5KKVHxy0b4cXRpXiXzGqmXYEYp9gAE nmJNfG4xSu3P5+FjfOBBN2nEMrGBNFdNZWTqWpjIOko4qHatVoAerYzkcXjIisFLhsmn ruBA== X-Gm-Message-State: APjAAAWYOdWOXp9IBv7hUNmsABa9MGtHhaJDcHPLULiHYCjimNcI8vP+ ER5AAPeXkuxpS9WzgS2PUKVX/Q== X-Google-Smtp-Source: APXvYqyqK0U9kAVF1xKhFOulgiuwuuTWp1Rj+WE8lScPbG/9AUdipHYSL1z5uX6ehRXrjMTCCIgoTg== X-Received: by 2002:a17:906:4a45:: with SMTP id a5mr39033449ejv.172.1558379277540; Mon, 20 May 2019 12:07:57 -0700 (PDT) Original-Received: from localhost ([2a02:8084:20e2:c380:8cad:ae29:555d:852d]) by smtp.gmail.com with ESMTPSA id c7sm1663301ejz.71.2019.05.20.12.07.56 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 20 May 2019 12:07:56 -0700 (PDT) In-Reply-To: <83woipbnih.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 17 May 2019 09:31:18 +0300") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 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" Xref: news.gmane.org gmane.emacs.bugs:159589 Archived-At: close 35721 quit Eli Zaretskii writes: >> From: "Basil L. Contovounesios" >> Cc: Khaled Hosny , , , <35721@debbugs.gnu.org> >> Date: Thu, 16 May 2019 21:54:10 +0100 >> >> The issue that prompted this report, however, is the alternating >> toggling of certain character compositions while typing in a separate >> part of the buffer (steps 9 and 10 in the OP), where no face change is >> involved. I'm sorry for not making this clearer from the outset. >> >> If you think this is unsurprising behaviour given the display engine's >> current implementation, I don't mind if you close this issue. > > I'm quite sure it is the result of how the display of complex scripts > is implemented. However, ... > >> Otherwise, perhaps either this issue can be retitled, or I can submit a >> new issue focussing only on that part of the OP. > > ... I think it would be best to file a new bug report, which is _only_ > about the above-mentioned alternations in display of composed > characters, with specific examples only for that issue. Then these > examples could be analyzed, and either (1) we find some bug that will > then be fixed, or (2) we conclude that these are artifacts of the > current implementation of the display engine, and make this a wishlist > bug report. Filed as bug#35811[1], so I'm closing this report. [1]: https://debbugs.gnu.org/35811 Thanks, -- Basil