From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#28312: 25.2; Arabic script changes when scrolling Date: Fri, 01 Sep 2017 11:35:38 +0300 Message-ID: <83h8wm24v9.fsf@gnu.org> References: <83lgly29zf.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1504255051 22446 195.159.176.226 (1 Sep 2017 08:37:31 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 1 Sep 2017 08:37:31 +0000 (UTC) Cc: 28312@debbugs.gnu.org, nick@tenpoint.co.nz To: YAMAMOTO Mitsuharu , Kenichi Handa Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Sep 01 10:37:21 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dnhRv-0004vM-Iz for geb-bug-gnu-emacs@m.gmane.org; Fri, 01 Sep 2017 10:37:11 +0200 Original-Received: from localhost ([::1]:52647 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dnhS2-0007c3-AO for geb-bug-gnu-emacs@m.gmane.org; Fri, 01 Sep 2017 04:37:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47150) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dnhRs-0007a1-IR for bug-gnu-emacs@gnu.org; Fri, 01 Sep 2017 04:37:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dnhRn-0001cI-Ji for bug-gnu-emacs@gnu.org; Fri, 01 Sep 2017 04:37:08 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:58555) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dnhRn-0001bx-GO for bug-gnu-emacs@gnu.org; Fri, 01 Sep 2017 04:37:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1dnhRm-0004DK-D8 for bug-gnu-emacs@gnu.org; Fri, 01 Sep 2017 04:37:03 -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, 01 Sep 2017 08:37:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28312 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 28312-submit@debbugs.gnu.org id=B28312.150425496716136 (code B ref 28312); Fri, 01 Sep 2017 08:37:02 +0000 Original-Received: (at 28312) by debbugs.gnu.org; 1 Sep 2017 08:36:07 +0000 Original-Received: from localhost ([127.0.0.1]:39003 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dnhQs-0004CC-QR for submit@debbugs.gnu.org; Fri, 01 Sep 2017 04:36:07 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:55358) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dnhQq-0004Bf-S3 for 28312@debbugs.gnu.org; Fri, 01 Sep 2017 04:36:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dnhQj-0000vO-R5 for 28312@debbugs.gnu.org; Fri, 01 Sep 2017 04:35:58 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:50758) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dnhQc-0000of-R7; Fri, 01 Sep 2017 04:35:50 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3896 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1dnhQb-00070j-Q1; Fri, 01 Sep 2017 04:35:50 -0400 In-reply-to: (message from YAMAMOTO Mitsuharu on Fri, 01 Sep 2017 16:36:13 +0900) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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: 208.118.235.43 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:136438 Archived-At: > Date: Fri, 01 Sep 2017 16:36:13 +0900 > From: YAMAMOTO Mitsuharu > Cc: Nick Helm , > 28312@debbugs.gnu.org > > 1. emacs -Q & > 2. M-x describe-language-environment RET Arabic RET > 3. Press and release the mouse button around the Arabic sample text. > (say, "Arabic" to the left) > > The appearance of the sample text changes if I press the button, and > it changes back again when I release it. Thanks, I see this, too. And it's a very old problem, I see it in Emacs 24.3 already. Also, the mouse is not necessary, I can see the problem if I scroll the *Help* window created by "C-h L" either via the scroll bar or even with "C-u 1 C-v". I'm guessing that somehow we don't redraw enough characters to give the font shaper a chance to shape them correctly. CC'ing Handa-san, in the hope that he could have some insights on this.