From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Making a non-ASCII space character visible Date: Sun, 17 Jun 2018 09:00:54 +0300 Message-ID: <83muvux889.fsf@gnu.org> References: NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1529215177 1394 195.159.176.226 (17 Jun 2018 05:59:37 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 17 Jun 2018 05:59:37 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Jun 17 07:59:33 2018 Return-path: Envelope-to: geh-help-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 1fUQin-0000CI-Rz for geh-help-gnu-emacs@m.gmane.org; Sun, 17 Jun 2018 07:59:29 +0200 Original-Received: from localhost ([::1]:53945 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUQku-0001kU-Qx for geh-help-gnu-emacs@m.gmane.org; Sun, 17 Jun 2018 02:01:40 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57741) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUQkL-0001kO-HA for help-gnu-emacs@gnu.org; Sun, 17 Jun 2018 02:01:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fUQkI-0004wh-B2 for help-gnu-emacs@gnu.org; Sun, 17 Jun 2018 02:01:05 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:45973) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUQkI-0004wd-79 for help-gnu-emacs@gnu.org; Sun, 17 Jun 2018 02:01:02 -0400 Original-Received: from [176.228.60.248] (port=4850 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fUQkH-0008Cw-CD for help-gnu-emacs@gnu.org; Sun, 17 Jun 2018 02:01:01 -0400 In-reply-to: (message from Will Parsons on Sat, 16 Jun 2018 16:15:59 -0400) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:117180 Archived-At: > From: Will Parsons > Date: Sat, 16 Jun 2018 16:15:59 -0400 > > I have a desire to use the Unicode character A007 (FIGURE SPACE) in a > document and to be able to distinguish it visually from a regular ASCII > space. This seems to be already done in the case of 00A0 (NO-BREAK > SPACE) which appears as an underscore with a distinctive face. > > It *looks* like I should be able to do this via the customization > option "Whitespace Display Mappings", but no matter what I do, > attempting to "Apply" the changes results in an error message, "This > field should contain a single character". (This message occurs even > if I try to change one of the display characters of an existing entry > in the list and apply.) Whitespace Display Mappings only has effect if you turn on whitespace-mode. The special display of u+00A0 does not require whitespace-mode, it is implemented directly in the display engine. Maybe we should extend that built-in treatment to the other "space-like" characters. > Feeling desperate, I copied the existing value of > whitespace-display-mappings directly into my custom.el file, and > manually added a new entry for A007 (8199) on the model of the > existing entry for 00A0 (160), but this seems to have no effect on the > display. Did you also turn on whitespace-mode?