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: Fri, 21 Oct 2016 21:41:21 +0200 Message-ID: <874m45trq6.fsf@mbork.pl> References: <87funqtegs.fsf@mbork.pl> <83lgxirw7k.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1477078933 17903 195.159.176.226 (21 Oct 2016 19:42:13 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 21 Oct 2016 19:42:13 +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 Fri Oct 21 21:42:09 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 1bxfhO-0001w8-Ao for geh-help-gnu-emacs@m.gmane.org; Fri, 21 Oct 2016 21:41:50 +0200 Original-Received: from localhost ([::1]:34074 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxfhQ-0004Lc-Dq for geh-help-gnu-emacs@m.gmane.org; Fri, 21 Oct 2016 15:41:52 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54991) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxfgr-0004LW-QD for help-gnu-emacs@gnu.org; Fri, 21 Oct 2016 15:41:18 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bxfgn-00074i-3e for help-gnu-emacs@gnu.org; Fri, 21 Oct 2016 15:41:17 -0400 Original-Received: from mail.mojserwer.eu ([2a01:5e00:2:52::8]:59755) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxfgm-00074U-Se for help-gnu-emacs@gnu.org; Fri, 21 Oct 2016 15:41:13 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 4282B1D6005; Fri, 21 Oct 2016 21:41:10 +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 Vc4BhZL8vnY2; Fri, 21 Oct 2016 21:41:07 +0200 (CEST) Original-Received: from localhost (static-dwadziewiec-jedenpiec7.echostar.pl [109.232.29.157]) by mail.mojserwer.eu (Postfix) with ESMTPSA id A2FA91D6004; Fri, 21 Oct 2016 21:41:07 +0200 (CEST) In-reply-to: <83lgxirw7k.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2a01:5e00:2:52::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:111586 Archived-At: On 2016-10-21, at 09:35, Eli Zaretskii wrote: >> From: Marcin Borkowski >> Date: Fri, 21 Oct 2016 08:15:31 +0200 >> >> --8<---------------cut here---------------start------------->8--- >> ;; this is a comment >> >> (put-text-property 14 21 'display '(after-string " which is cool!")) >> --8<---------------cut here---------------end--------------->8--- >> >> After C-x C-e with point at the end, I see this: >> >> --8<---------------cut here---------------start------------->8--- >> ;; this is a comment >> >> (put-text-property 14 21 'display '(after-string " which is cool!")) >> --8<---------------cut here---------------end--------------->8--- >> >> but I expected this: >> >> --8<---------------cut here---------------start------------->8--- >> ;; this is a commentcomment >> >> (put-text-property 14 21 'display '(after-string " which is cool!")) >> --8<---------------cut here---------------end--------------->8--- >> >> What am I doing wrong? > > 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? 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;-).) TIA, -- Marcin Borkowski