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#42562: Problem with rendering Persian text still exists in minibuffer and dired Date: Fri, 31 Jul 2020 15:56:24 +0300 Message-ID: <83ime3etc7.fsf@gnu.org> References: <835za8gyth.fsf@gnu.org> <83ime6f9zp.fsf@gnu.org> <83zh7hdt9x.fsf@gnu.org> <83sgd8e06s.fsf@gnu.org> <83o8nwdxrg.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32295"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 42562@debbugs.gnu.org To: Sineau Gh Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jul 31 14:57:16 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 1k1Ub3-0008F9-U5 for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 31 Jul 2020 14:57:13 +0200 Original-Received: from localhost ([::1]:60854 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k1Ub2-0001Yx-Rs for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 31 Jul 2020 08:57:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59784) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k1Uas-0001Yb-Ti for bug-gnu-emacs@gnu.org; Fri, 31 Jul 2020 08:57:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:54259) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k1Uas-0004EB-Ky for bug-gnu-emacs@gnu.org; Fri, 31 Jul 2020 08:57:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1k1Uas-0003Hl-Fi for bug-gnu-emacs@gnu.org; Fri, 31 Jul 2020 08:57:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 31 Jul 2020 12:57:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 42562 X-GNU-PR-Package: emacs Original-Received: via spool by 42562-submit@debbugs.gnu.org id=B42562.159620021012612 (code B ref 42562); Fri, 31 Jul 2020 12:57:02 +0000 Original-Received: (at 42562) by debbugs.gnu.org; 31 Jul 2020 12:56:50 +0000 Original-Received: from localhost ([127.0.0.1]:37572 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k1Uag-0003HL-BN for submit@debbugs.gnu.org; Fri, 31 Jul 2020 08:56:50 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:49666) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k1Uae-0003H6-Cv for 42562@debbugs.gnu.org; Fri, 31 Jul 2020 08:56:49 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:41330) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k1UaZ-0004Dq-2o; Fri, 31 Jul 2020 08:56:43 -0400 Original-Received: from [176.228.60.248] (port=1441 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1k1UaX-0003F7-Ci; Fri, 31 Jul 2020 08:56:42 -0400 In-Reply-To: (message from Sineau Gh on Fri, 31 Jul 2020 11:02:44 +0430) 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:183730 Archived-At: > From: Sineau Gh > Date: Fri, 31 Jul 2020 11:02:44 +0430 > Cc: 42562@debbugs.gnu.org > > تحقیق > تست > مدرن.txt > تحقیق.org > - visit a file using C-x C-f. > - use TAB for *Completion Buffer*. > - first character of all file names are disjointed. > - type ت to filter the filenames, now the second characters are > disjointed. > - now open one of the files. in modeline first and last characters of > the filename are disjointed. Thanks. Now everything is clear: this is due to the basic limitation of how Emacs displays text with different faces: we render each run of character in the same face separately from characters in a different face. So if the face changes in the middle of a word, we render the two parts of the word separately, and that breaks Arabic shaping. Fixing this would need significant changes in the low-level code that handles text layout, which is one of the basics of the current display engine. Patches are welcome.