From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Making vertical-border char defcustom? Date: Tue, 21 Jan 2020 17:30:39 +0200 Message-ID: <83lfq0x1wg.fsf@gnu.org> References: <2E19AE9F-891D-42D9-9BD4-9B355804C189@paulwrankin.com> <8336cbzcft.fsf@gnu.org> <135AF6D0-B520-496B-92F6-531CEDF2C932@paulwrankin.com> <83tv4qvw5b.fsf@gnu.org> <03C83895-EF8F-4379-B41F-EF33926F376F@paulwrankin.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="37619"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: "Paul W. Rankin" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Jan 21 16:39:37 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1itvcu-0009aq-PB for ged-emacs-devel@m.gmane-mx.org; Tue, 21 Jan 2020 16:39:36 +0100 Original-Received: from localhost ([::1]:56878 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1itvct-0002Qo-RS for ged-emacs-devel@m.gmane-mx.org; Tue, 21 Jan 2020 10:39:35 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55272) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1itvU8-0000EZ-0I for emacs-devel@gnu.org; Tue, 21 Jan 2020 10:30:35 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:47213) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1itvU7-0004LH-Sa; Tue, 21 Jan 2020 10:30:31 -0500 Original-Received: from [176.228.60.248] (port=1443 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1itvU3-0003v1-Kn; Tue, 21 Jan 2020 10:30:28 -0500 In-reply-to: <03C83895-EF8F-4379-B41F-EF33926F376F@paulwrankin.com> (hello@paulwrankin.com) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:244461 Archived-At: > From: "Paul W. Rankin" > Date: Tue, 21 Jan 2020 16:25:52 +1000 > Cc: emacs-devel@gnu.org > > On 21 Jan 2020, at 4:08 am, Eli Zaretskii wrote: > > We don't offer customization of the display tables via defcustom, most > > probably because it is "tricky" (as you yourself discovered). I > > hesitate to offer just this one slot of the display table, and the > > fact that it only affects TTY frames and requires UTF-8 capable > > terminal on top of that doesn't provide additional motivation... > > Do you mean tricky from an implementation or user perspective? The former. This is a low-level facility that Emacs itself uses on a very low level. Naïvely customizing it will have global session-wide effect, something many users won't want, and then they will want to have user-level access to buffer- and window-local display tables, something that is not trivial to get right. > > display-fill-column-indicator-character is an entirely different > > matter, it's a minor mode which lets users specify an indicator glyph. > > This I mean more from a user perspective, as in, "Oh I see I can customise this vertical line but I can't customise this vertical line next to it..." The other one was never meant to be customized, not really.