From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: How to use display text property with after-string? Date: Sat, 22 Oct 2016 05:57:09 +0200 Message-ID: <8737jpt4ru.fsf@mbork.pl> References: <87funqtegs.fsf@mbork.pl> <83lgxirw7k.fsf@gnu.org> <874m45trq6.fsf@mbork.pl> <83vawlqxin.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1477113229 19968 195.159.176.226 (22 Oct 2016 05:13:49 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 22 Oct 2016 05:13:49 +0000 (UTC) User-Agent: mu4e 0.9.17; emacs 26.0.50.1 Cc: help-gnu-emacs@gnu.org To: Eli Zaretskii Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Oct 22 07:13:45 2016 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 1bxocg-0003Fm-3M for geh-help-gnu-emacs@m.gmane.org; Sat, 22 Oct 2016 07:13:34 +0200 Original-Received: from localhost ([::1]:35578 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxoci-0006lS-CO for geh-help-gnu-emacs@m.gmane.org; Sat, 22 Oct 2016 01:13:36 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48265) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxocI-0006lA-Pv for help-gnu-emacs@gnu.org; Sat, 22 Oct 2016 01:13:11 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bxocH-0007SK-TC for help-gnu-emacs@gnu.org; Sat, 22 Oct 2016 01:13:10 -0400 Original-Received: from mail.mojserwer.eu ([195.110.48.8]:56188) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxocB-0007Qf-Pb; Sat, 22 Oct 2016 01:13:03 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 36D001D6005; Sat, 22 Oct 2016 05:57:02 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yPzA89iHDqgK; Sat, 22 Oct 2016 05:56:55 +0200 (CEST) Original-Received: from localhost (static-dwadziewiec-jedenpiec7.echostar.pl [109.232.29.157]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 80FF91D6004; Sat, 22 Oct 2016 05:56:55 +0200 (CEST) In-reply-to: <83vawlqxin.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 195.110.48.8 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:111590 Archived-At: On 2016-10-21, at 22:04, Eli Zaretskii wrote: >> From: Marcin Borkowski >> Cc: help-gnu-emacs@gnu.org >> Date: Fri, 21 Oct 2016 21:41:21 +0200 >> >> > The 'display' property doesn't support after-string, only the overlay >> > properties do. >> >> I see. I was a bit afraid that is the case. >> >> Is there any other way to put some nonexistent text in the buffer? > > What's wrong with 'display' text property? Just make its value be a > string, not '(after-string "something"). OK. >> Overlays are not very good that, since I hear many overlays in a buffer >> may slow things down. My use case is as follows: I want to write >> a function which will find all the dates in the US format (M/D/Y) in the >> buffer and put a date in a sane format (maybe together with something >> like "3 days ago" or "tomorrow") next to them. (That would be very >> useful for me, since I sometimes get emails from Americans, and dealing >> with dates in M/D/Y format is a huge cognitive load for me;-).) > > The 'display' text property whose value is a string causes that string > be displayed _instead_ of the text covered by the text property. > Which sounds exactly what you want. One caveat: you cannot move > cursor through the display string (the same is true for > after-strings). Thanks. It was not exactly what I wanted: I wanted a fragment of buffer containing e.g. 10/25/16 to display as 10/25/16 [2016-10-25, 3 days from today] Of course, I can include the original text in the `display' property, but as you have pointed out, this is not the same (though I'm not even shure whether it's not actually _better_). Thanks a lot, -- Marcin Borkowski