From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#57072: [BUG] update-glyphless-char-display and variation selectors Date: Tue, 16 Aug 2022 15:01:22 +0300 Message-ID: <83wnb8fld9.fsf@gnu.org> References: <83edxpvec4.fsf@gnu.org> <83zggdtmg0.fsf@gnu.org> <83sfm4qm5l.fsf@gnu.org> <87v8qs8ks7.fsf@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="39146"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 57072@debbugs.gnu.org, svenssonaxel@gmail.com To: Robert Pluim Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 16 14:02:14 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1oNvGw-000A28-1t for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 14:02:14 +0200 Original-Received: from localhost ([::1]:53038 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oNvGu-0004vk-Sn for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 08:02:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46678) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNvGk-0004rr-MG for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 08:02:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:55403) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oNvGk-0006aT-B4 for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 08:02:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oNvGj-0007SA-VW for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 08:02:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 16 Aug 2022 12:02:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 57072 X-GNU-PR-Package: emacs Original-Received: via spool by 57072-submit@debbugs.gnu.org id=B57072.166065130228621 (code B ref 57072); Tue, 16 Aug 2022 12:02:01 +0000 Original-Received: (at 57072) by debbugs.gnu.org; 16 Aug 2022 12:01:42 +0000 Original-Received: from localhost ([127.0.0.1]:45152 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oNvGP-0007RZ-Pm for submit@debbugs.gnu.org; Tue, 16 Aug 2022 08:01:42 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:33660) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oNvGO-0007RN-1u for 57072@debbugs.gnu.org; Tue, 16 Aug 2022 08:01:40 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:37954) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNvGI-0006Wi-R0; Tue, 16 Aug 2022 08:01:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=tj5o0jmIIzD05cKlTeh1449BPi9d5L2nCaOGXbk6yR8=; b=hcOELtGq152F FbKD9FfD3StZXcKOLD8joJgcqmTxykhFQ3APdPtj7R20FpRE9IhG4O0GMcLoyFHNyK3Szw11V3Mb0 F5TsjVVpdN7Jh8aerP3LszV+upbmDNymVeQKFSCZuchROBhhWi8nigP4FubisBnPLjiFyma7afe9u GBkY4DmBVQrwsgiKwEQ+hclQ0DRK29Z4cvSbK6vo2S2K6UcVpu+AYTGIdEcqJLYZfcomADAbdw6io cy4x+cT+zBS/EYCPhSadkEBTXkM0+RfIDEqQZjhl72YX4a4lgjWmGlSUde9teX6C7S8BgATcgFZ2A uAiAEeFTff6peJpQoUprFw==; Original-Received: from [87.69.77.57] (port=1282 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNvGI-0008P7-78; Tue, 16 Aug 2022 08:01:34 -0400 In-Reply-To: <87v8qs8ks7.fsf@gmail.com> (message from Robert Pluim on Tue, 16 Aug 2022 13:55:52 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:239905 Archived-At: > From: Robert Pluim > Cc: Axel Svensson , 57072@debbugs.gnu.org > Date: Tue, 16 Aug 2022 13:55:52 +0200 > > >>>>> On Wed, 10 Aug 2022 16:10:46 +0300, Eli Zaretskii said: > > >> From: Axel Svensson > >> Date: Tue, 9 Aug 2022 22:33:40 +0200 > >> Cc: 57072@debbugs.gnu.org > >> > >> > Now, VS16 is almost always composed with preceding characters, so I > >> > think you can only see it as acronym if you deliberately force Emacs > >> > not to compose it, e.g. by preceding it with U+20DD COMBINING > >> > ENCLOSING CIRCLE, or precede it and follow it by U+200C ZERO WIDTH > >> > NON-JOINER, or disable auto-composition-mode. > >> > >> - Preceding it with U+20DD still produces the empty box > >> - Preceding it and following it by U+200C still produces the empty box > >> - Disabling auto-composition-mode produces the "VS16" acronym. > > Eli> Yes, I think this is because of the special composition rules we have > Eli> for VS16 (which are required to display Emoji sequences correctly). > > I guess we could adjust the composition rules for U+FE0F, but getting > that right could be tricky (there are many of them, and there will be > ordering dependencies). We could, but I'm not sure it's worth the hassle. There's no particular reason for people to want to display VS-16 as an acronym, of all the ways, since it almost always should be composed.