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.devel Subject: Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it? Date: Thu, 27 Jan 2022 11:55:25 +0200 Message-ID: <83bkzxfqpe.fsf@gnu.org> References: <87sftk49ih.fsf@yahoo.com> <837dawt0h4.fsf@gnu.org> <838rv9plyf.fsf@gnu.org> <837dasntoj.fsf@gnu.org> <834k5tl4a9.fsf@gnu.org> <87mtjkt6m9.fsf@gmail.com> <83ilu8htws.fsf@gnu.org> <87ee4uykli.fsf@igel.home> <83h79pfzrm.fsf@gnu.org> <87y231k34e.fsf@gmail.com> 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="25326"; mail-complaints-to="usenet@ciao.gmane.io" Cc: psainty@orcon.net.nz, luangruo@yahoo.com, schwab@linux-m68k.org, rms@gnu.org, emacs-devel@gnu.org To: =?utf-8?Q?K=C3=A9vin?= Le Gouguec Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Jan 27 11:06:25 2022 Return-path: Envelope-to: ged-emacs-devel@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 1nD1fc-0006JL-3R for ged-emacs-devel@m.gmane-mx.org; Thu, 27 Jan 2022 11:06:24 +0100 Original-Received: from localhost ([::1]:56390 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nD1fa-0006dv-P8 for ged-emacs-devel@m.gmane-mx.org; Thu, 27 Jan 2022 05:06:22 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:49768) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nD1VA-0005zq-Cc for emacs-devel@gnu.org; Thu, 27 Jan 2022 04:55:38 -0500 Original-Received: from [2001:470:142:3::e] (port=52678 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nD1V9-00039w-JC; Thu, 27 Jan 2022 04:55:35 -0500 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=0BSQAlde/VTJxv3Kz9b7ozVFoXjKYbd4UYPXw43vudw=; b=WoVAfdnoejYrrHtyUy2B oQiks50Z29WlDbZ4ZJad7Yg5mOg7Xa8Yxqo5/0FdTtkCussPSqHhMaPpAT7eo+M6Vso/xis/6rZDJ CD5jWF1UZcFSVYiZAF5Q5i3RPGrw4kFhhIacNvXaenF5FzaDuffhRDyGVIEhKYWwUPIBZteFoz4fU YatzESIvVk5QEN7lynuU6BISDlDeeYtU4MfWj9knzh2FQgnnNIchrVNYysIUeEocoCOXOf1zKyJhu EKS8m5kmBjOgr4nbJIU+IIhqULYdHJlip3tUHG6hXilbClXaRAVtnBEComxjmMBXwZD0JmiaHkXv/ ZXrOcLxYyyerdw==; Original-Received: from [87.69.77.57] (port=1045 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 1nD1V7-0002XG-0L; Thu, 27 Jan 2022 04:55:33 -0500 In-Reply-To: <87y231k34e.fsf@gmail.com> (message from =?utf-8?Q?K=C3=A9vin?= Le Gouguec on Thu, 27 Jan 2022 09:13:37 +0100) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:285481 Archived-At: > From: Kévin Le Gouguec > Cc: rms@gnu.org, schwab@linux-m68k.org, psainty@orcon.net.nz, > luangruo@yahoo.com, emacs-devel@gnu.org > Date: Thu, 27 Jan 2022 09:13:37 +0100 > > Reading the documentation of the various glyphless-* knobs, I wonder if > it would make sense to provide another group for > glyphless-char-display-control? 'no-font is not helpful on my TTY, IIUC > because terminal-coding-system says "utf-8-unix"?). > > Maybe 'no-display, meaning (null (char-displayable-p CHAR))? Isn't that what glyphless-char-display-control already does on a TTY for no-font? We just need to set up the table for such characters. But I don't think that displaying the hex code is the best alternative for this particular use case, as displaying the ASCII equivalents is much better.