From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#10895: Quirky behaviours with Arabic text Date: Tue, 18 Aug 2020 07:32:53 +0300 Message-ID: <83v9hgfua2.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="6563"; mail-complaints-to="usenet@ciao.gmane.io" Cc: karhof21@gmail.com, 10895@debbugs.gnu.org To: Stefan Kangas Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 18 06:38:35 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k7tON-0001cN-Gq for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 Aug 2020 06:38:35 +0200 Original-Received: from localhost ([::1]:53418 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7tOM-0000Qv-H9 for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 Aug 2020 00:38:34 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:52998) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7tJy-0007e7-Sz for bug-gnu-emacs@gnu.org; Tue, 18 Aug 2020 00:34:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50425) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k7tJy-00085S-Id for bug-gnu-emacs@gnu.org; Tue, 18 Aug 2020 00:34:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1k7tJy-000313-Eq for bug-gnu-emacs@gnu.org; Tue, 18 Aug 2020 00:34:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 18 Aug 2020 04:34:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 10895 X-GNU-PR-Package: emacs Original-Received: via spool by 10895-submit@debbugs.gnu.org id=B10895.159772519511537 (code B ref 10895); Tue, 18 Aug 2020 04:34:02 +0000 Original-Received: (at 10895) by debbugs.gnu.org; 18 Aug 2020 04:33:15 +0000 Original-Received: from localhost ([127.0.0.1]:33738 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k7tJC-000300-Tv for submit@debbugs.gnu.org; Tue, 18 Aug 2020 00:33:15 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:42744) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k7tJB-0002zo-MD for 10895@debbugs.gnu.org; Tue, 18 Aug 2020 00:33:14 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:45274) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7tJ6-00081O-DR; Tue, 18 Aug 2020 00:33:08 -0400 Original-Received: from [176.228.60.248] (port=2246 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1k7tJ5-0003sz-3u; Tue, 18 Aug 2020 00:33:07 -0400 In-Reply-To: (message from Stefan Kangas on Mon, 17 Aug 2020 22:34:35 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:185435 Archived-At: > From: Stefan Kangas > Date: Mon, 17 Aug 2020 22:34:35 +0000 > Cc: 10895@debbugs.gnu.org > > > 1) in some fonts (e.g. courier New), the vowel marks (harakaat) are > > not displayed, despite the fact that the texts contains them. However, > > if the cursor passes over the relevant text, moving in the > > right-to-left direction, the vowel marks become visible. Curiously, if > > the cursor passes back on the text, moving in the left-to-right > > direction, the vowel marks disappear. > > This problem manifests itself in different ways according to the font used. > > With other fonts, the problem is only partial: only part of the > > diacritic signs is visible, and by passing over them with the cursor > > (from right to left), they become fully visible. When passing over the > > text in the opposite direction, they again become half-visible. > > > > 2) the rendering of the vowel marks is poor even when they are > > displayed. For instance, vowel marks partially overlap some of the > > letters, e.g. the kasrah sign overlaps the two dots of the letter yaa. > > > > 3) vowel marks are not always in synch with the main text, so that > > they sometimes appear in a displaced position (e.g. on the previous > > letter). This is totally unacceptable, of course. > > > > Bottomline: there are multiple problems with the visual rendering of > > the diacritics. > > (That was 8 years ago.) > > Do you still see this on a recent version of Emacs, such as the recently > released version 27.1? > > Would this have been fixed by the recent addition of harfbuzz support? I think those problems were fixed long ago, but let's wait for the OP to confirm, if possible.