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: Sat, 05 Feb 2022 16:06:42 +0200 Message-ID: <83iltt1k7h.fsf@gnu.org> References: <837dasntoj.fsf@gnu.org> <834k5tl4a9.fsf@gnu.org> <87mtjkt6m9.fsf@gmail.com> <83ilu8htws.fsf@gnu.org> <3E718CA2-889F-4AEE-B79C-EB3A221D1CB2@gnu.org> <83o83wc7gs.fsf@gnu.org> <8335l5brov.fsf@gnu.org> <83mtjc838i.fsf@gnu.org> <83zgna7hyd.fsf@gnu.org> <83ee4l78rw.fsf@gnu.org> <87ee4jhezi.fsf@logand.com> <8735kxe7ug.fsf@logand.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="29880"; mail-complaints-to="usenet@ciao.gmane.io" Cc: psainty@orcon.net.nz, luangruo@yahoo.com, kevin.legouguec@gmail.com, rms@gnu.org, emacs-devel@gnu.org To: Tomas Hlavaty Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Feb 05 15:08:45 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 1nGLk4-0007bL-GV for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Feb 2022 15:08:44 +0100 Original-Received: from localhost ([::1]:35222 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nGLk1-0003tw-3F for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Feb 2022 09:08:41 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:48238) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nGLiW-0002LN-Ax for emacs-devel@gnu.org; Sat, 05 Feb 2022 09:07:08 -0500 Original-Received: from [2001:470:142:3::e] (port=34820 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 1nGLiU-0002WJ-42; Sat, 05 Feb 2022 09:07:06 -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=YrjVMJsaW8BM81KeIAIArxqwJ3Kvyx9KsCra5WhEs0A=; b=j8BVc3jLCR7kjDaPjd+U GgTBTRZSvkykfr447CaV6FPrPbEAK0x1W+Mfffr2Ze79iERY87NAl4skKH8mrMRk0RJmZ/1/wIXjh PfuH5c9jz4aC73xx9kJ1zCWauJSPldHV9FPV0RrTUKLyF4suTliZDEPWbV5N3DUMzI7wPxmjnrIIb 8424nv3uItV72PxW6HFwhAD6sREzItwYZ9Et2W9hnzEIqPiG0DC5HbvaPqURz0PdneF+BswW5i3Bo EOO7S1waCzyp0buyRUD/TXFcytkNcS1AkpVixfovUaCQCTWC+L8eaYseewnWbvWwfObrChUiCg4Z+ 3VBPZdyER3vi3w==; Original-Received: from [87.69.77.57] (port=4360 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 1nGLiQ-0003yE-5t; Sat, 05 Feb 2022 09:07:02 -0500 In-Reply-To: <8735kxe7ug.fsf@logand.com> (message from Tomas Hlavaty on Sat, 05 Feb 2022 14:55:19 +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:285901 Archived-At: > From: Tomas Hlavaty > Cc: eliz@gnu.org, psainty@orcon.net.nz, luangruo@yahoo.com, > emacs-devel@gnu.org, kevin.legouguec@gmail.com > Date: Sat, 05 Feb 2022 14:55:19 +0100 > > char-displayable-p returns non-nil even though I see boxes. Is this the Linux console or is this a terminal emulator? If it's a console, does it support the ioctl issued by calculate_glyph_code_table? Also, these calls are incorrect: (char-displayable-p ?ã¯) (char-displayable-p ?ã˘) char-displayable-p accepts a single character, not 2.