From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Alberto Luaces Newsgroups: gmane.emacs.help Subject: Re: Modify text appearance (put spaces after commas just for display) Date: Tue, 26 Sep 2017 13:05:41 +0200 Message-ID: <87lgl1wwhm.fsf@eps142.cdf.udc.es> References: <87tvzpx1qo.fsf@eps142.cdf.udc.es> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1506425214 28825 195.159.176.226 (26 Sep 2017 11:26:54 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 26 Sep 2017 11:26:54 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Sep 26 13:26:50 2017 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 1dwo0l-000702-JW for geh-help-gnu-emacs@m.gmane.org; Tue, 26 Sep 2017 13:26:47 +0200 Original-Received: from localhost ([::1]:46797 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwo0r-0005G7-81 for geh-help-gnu-emacs@m.gmane.org; Tue, 26 Sep 2017 07:26:53 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:59552) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwngl-0004Xh-WA for help-gnu-emacs@gnu.org; Tue, 26 Sep 2017 07:06:16 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dwngf-00014G-T5 for help-gnu-emacs@gnu.org; Tue, 26 Sep 2017 07:06:07 -0400 Original-Received: from [195.159.176.226] (port=57131 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dwngf-00013n-MW for help-gnu-emacs@gnu.org; Tue, 26 Sep 2017 07:06:01 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1dwngS-0006yq-Gg for help-gnu-emacs@gnu.org; Tue, 26 Sep 2017 13:05:48 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 40 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:OqkLnrI0rOqWl750eK6EwoLAW+0= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 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:114414 Archived-At: Yuri Khan writes: > On Tue, Sep 26, 2017 at 4:12 PM, Alberto Luaces wrote: > >> So, from the top of your head, what would be the less painful method to >> change every comma to a comma+space, or at least change the color of the >> commas to anything more distinguishable and attach it to the language >> mode hook? > > One imperfect approximation would be to use prettify-symbols-mode. > > $ emacs -Q > > (add-to-list 'prettify-symbols-alist '("," . (?, (Br . Bl) ?\s))) > > M-x prettify-symbols-mode RET > > Limitations: > > * Does not act on commas in comments or string literals. > * If a comma is followed by a space, you will see two spaces. > Nice solution, thanks! The limitations are fine by me, since I do not care about the comments, and having several spaces together does not hinder my reading. I like very much how emacs keeps considering the substituted character as a whole block, so that eases the editing of the file since I know which spaces are real and which ones are not. > If you want to overcome these, you will either want to write some > custom predicates for prettify-symbols-mode, or dive a layer down and > work with ‘font-lock-add-keywords’ directly. > Nice to know. Thanks again! -- Alberto