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.help Subject: Re: Verticality and future of display engine and lines (bis) [Was: Re: RTL lines] Date: Wed, 27 Oct 2021 19:18:21 +0300 Message-ID: <83wnlyv3ua.fsf@gnu.org> References: <3519414.WYFCpekPd3@galex-713.eu> <2251529.Z2IGfANImH@galex-713.eu> 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="17852"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Oct 27 18:52:47 2021 Return-path: Envelope-to: geh-help-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 1mfmAQ-0004TS-Vi for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 27 Oct 2021 18:52:47 +0200 Original-Received: from localhost ([::1]:35488 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mfmAP-0005r6-Or for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 27 Oct 2021 12:52:45 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49762) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mfld9-000414-J8 for help-gnu-emacs@gnu.org; Wed, 27 Oct 2021 12:18:24 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:42948) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mfld8-0002hD-VS for help-gnu-emacs@gnu.org; Wed, 27 Oct 2021 12:18:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=htAUyj//9qE/7g6Y9ihy6g4oCtSiHnLTDXyTaVswT6Q=; b=jRHzB2oRvPYQjYPXSrqs RHreuWLuUd3/nU0v9X7lSGHIn2hK6/ZRX4VT/AywULOIT8zAVsHCSAcxUUfiX7EyuhYXfVu7oqDN2 YBGTe82m7ixQMmlXMEi0h0ByFn/6v457ROxLsk5w+SxMs6SiXagAjeQBZCerOx2IHoxMwRLZip8vu 9SCZnYke6IKAOp6JeBa69xAB2+7h/JNiSqWA/bg/rfBMXlJqaHW0kcibTs6XjQeduXjfrVKv4g/KY b6VHqtTBR+EGow+N/MyM0E2mgAR73ekGWxeJS63TfPJFkzIbQtLmRfyjdAz9WWfjNpLPteokf4LPA oR2ylkBx/MPwFg==; Original-Received: from [87.69.77.57] (port=3031 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mfld8-0000DX-F7 for help-gnu-emacs@gnu.org; Wed, 27 Oct 2021 12:18:22 -0400 In-Reply-To: <2251529.Z2IGfANImH@galex-713.eu> (message from Alexandre Garreau on Wed, 27 Oct 2021 16:50:17 +0200) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:134233 Archived-At: > From: Alexandre Garreau > Date: Wed, 27 Oct 2021 16:50:17 +0200 > > I just coincidentally ended on a webpage with a vertical script (which > surprisingly to me displayed correctly under firefox): > > https://fr.wikipedia.org/wiki/Sakhaline > > However copypasting that into emacs, or viewing the page with Eww makes > that text incorrectly LTR. Hence I suppose emacs doesn’t yet support > viewing and editing TTB/BBT text as such… > > Have there been an attempt at that? No. > Anyway, what would a such change require and how much would it > overturn the current display engine? The low level of the display engine will need to acquire a set of routines that work very differently from what we have there now. And I don't even understand what is being expected from this. E.g., what happens when the user scrolls the window up or down? Do all the columns change like a snake? > would a solution to that problem possibly cover up with the problem > I raised in the other almost-homonym thread? Which is what?