From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: Bidirectional text and URLs Date: Sun, 30 Nov 2014 04:38:04 -0500 Message-ID: References: <87zjbbdt0u.fsf@igel.home> <833892aq3m.fsf@gnu.org> Reply-To: rms@gnu.org NNTP-Posting-Host: plane.gmane.org Content-Type: text/plain; charset=ISO-8859-15 X-Trace: ger.gmane.org 1417340309 19233 80.91.229.3 (30 Nov 2014 09:38:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 30 Nov 2014 09:38:29 +0000 (UTC) Cc: larsi@gnus.org, schwab@linux-m68k.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Nov 30 10:38:24 2014 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xv0xS-0002RX-Bo for ged-emacs-devel@m.gmane.org; Sun, 30 Nov 2014 10:38:22 +0100 Original-Received: from localhost ([::1]:50008 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xv0xR-0001Zg-VM for ged-emacs-devel@m.gmane.org; Sun, 30 Nov 2014 04:38:21 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34078) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xv0xE-0001YO-0A for emacs-devel@gnu.org; Sun, 30 Nov 2014 04:38:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xv0xC-0006Rb-P0 for emacs-devel@gnu.org; Sun, 30 Nov 2014 04:38:07 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:58085) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xv0xC-0006RQ-MJ for emacs-devel@gnu.org; Sun, 30 Nov 2014 04:38:06 -0500 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1Xv0xA-0003cv-C5; Sun, 30 Nov 2014 04:38:04 -0500 In-reply-to: <833892aq3m.fsf@gnu.org> (message from Eli Zaretskii on Sat, 29 Nov 2014 19:11:57 +0200) X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:178499 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > This suggests we need to provide a primitive to tell Lisp programs a > > guaranteed answer for which direction the text at a certain point is > > displayed in. > The directionality of the text is determined by the display engine, > and by design is not subject to control by Lisp programs, I think we are talking about different issues. You're talking about whether Lisp programs control the directionality. I'm talking about providing a way for them to inquire what display will do. > > Also, a primitive to verify that a certain region of text has no > > bidi strangeness within it. > We need to have a good instrumental definition of "bidi strangeness" > for that. I suggest the definition: whatever would cause the displayed order of characters to be perhaps misleading if the text is interpreted as a URL or anything else with programatic significance. -- Dr Richard Stallman President, Free Software Foundation 51 Franklin St Boston MA 02110 USA www.fsf.org www.gnu.org Skype: No way! That's nonfree (freedom-denying) software. Use Ekiga or an ordinary phone call.