From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#10895: Quirky behaviours with Arabic text Date: Mon, 17 Aug 2020 22:34:35 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34642"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 10895@debbugs.gnu.org To: sergei karhof Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 18 00:35:13 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 1k7nih-0008sX-F5 for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 Aug 2020 00:35:11 +0200 Original-Received: from localhost ([::1]:57036 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7nig-0006sI-Hn for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 17 Aug 2020 18:35:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39632) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7niY-0006rl-FB for bug-gnu-emacs@gnu.org; Mon, 17 Aug 2020 18:35:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50074) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k7niY-0006qI-5k for bug-gnu-emacs@gnu.org; Mon, 17 Aug 2020 18:35:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1k7niX-0004bo-TK for bug-gnu-emacs@gnu.org; Mon, 17 Aug 2020 18:35:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Kangas Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 17 Aug 2020 22:35:01 +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=B10895.159770368317674 (code B ref 10895); Mon, 17 Aug 2020 22:35:01 +0000 Original-Received: (at 10895) by debbugs.gnu.org; 17 Aug 2020 22:34:43 +0000 Original-Received: from localhost ([127.0.0.1]:33384 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k7niF-0004az-37 for submit@debbugs.gnu.org; Mon, 17 Aug 2020 18:34:43 -0400 Original-Received: from mail-yb1-f181.google.com ([209.85.219.181]:43247) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k7niD-0004ab-57 for 10895@debbugs.gnu.org; Mon, 17 Aug 2020 18:34:41 -0400 Original-Received: by mail-yb1-f181.google.com with SMTP id m200so10273394ybf.10 for <10895@debbugs.gnu.org>; Mon, 17 Aug 2020 15:34:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:in-reply-to:references:user-agent :mime-version:date:message-id:subject:to:cc; bh=2loQUDxKzKXZKtCWXNxomzFvcNbzOwTsCSIKzw3FUuY=; b=G/yVeuDCbUimP6u9eDIcHESyQpZqHH8ooxro25sjNnmWktoHHQePz+CVta9/c+XUfk x8juQVMIdupCTsV83GebgobIlMO5rb26e/cDNh6SQ7khxpFI6YZli0XqTzmlkWo0jjN3 jSdmjWpM9vcSz7uWRKx/g920U7Dvjl5m4FcnMrm6hFaoqj0gcTkpz5vmhEQPfNzo2ZU0 PesiCg8jBirFbx7Su2ZO34vVqy0yCxRfKUs+WG7Kw9U9W+dyI0yVqeK7IHv4d0ltFU36 Cs23NpiXNVkpDqdopE/jhnv4PeBgggWo4ATb56IgGAZO/vUXOk4CSc0HjXlSZQAo5yat 3tRw== X-Gm-Message-State: AOAM530JP6IwMbZpvXqjdtCRsmRgQ4Rq+NeJCPOq3NG3PFbXSHnqQPrz NqoinuJx7WPZz8zSGQxrksuk5Ekz3CH8N9hrWceRVkjqNL2Hog== X-Google-Smtp-Source: ABdhPJx8JUy/iq8A0ciokLny95UsA/iLPM79dUc5sjBtURSyfFIvhguDYsTmX0QW9FJWmydqkfcTVnHLmDIpVM9V7UE= X-Received: by 2002:a25:9843:: with SMTP id k3mr23655449ybo.466.1597703675751; Mon, 17 Aug 2020 15:34:35 -0700 (PDT) Original-Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Mon, 17 Aug 2020 22:34:35 +0000 In-Reply-To: (sergei karhof's message of "Mon, 27 Feb 2012 00:47:36 +0100") 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:185421 Archived-At: sergei karhof writes: > I want to report some quirky behaviours of Emacs (devel 24.0.93 version, > running under Windows 7), when dealing with Arabic text: > > 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? Best regards, Stefan Kangas