From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Robert Pluim Newsgroups: gmane.emacs.bugs Subject: bug#57072: [BUG] update-glyphless-char-display and variation selectors Date: Tue, 16 Aug 2022 13:55:52 +0200 Message-ID: <87v8qs8ks7.fsf@gmail.com> References: <83edxpvec4.fsf@gnu.org> <83zggdtmg0.fsf@gnu.org> <83sfm4qm5l.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13694"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 57072@debbugs.gnu.org, Axel Svensson To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 16 13:57:30 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 1oNvCM-0003RZ-BY for geb-bug-gnu-emacs@m.gmane-mx.org; 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Tue, 16 Aug 2022 04:55:53 -0700 (PDT) In-Reply-To: <83sfm4qm5l.fsf@gnu.org> (Eli Zaretskii's message of "Wed, 10 Aug 2022 16:10:46 +0300") 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:239903 Archived-At: >>>>> 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 >>=20 >> > Now, VS16 is almost always composed with preceding characters, so I >> > think you can only see it as acronym if you deliberately force Ema= cs >> > 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. >>=20 >> - Preceding it with U+20DD still produces the empty box >> - Preceding it and following it by U+200C still produces the empty b= ox >> - Disabling auto-composition-mode produces the "VS16" acronym. Eli> Yes, I think this is because of the special composition rules we h= ave 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). =EF=B8=8F Robert --=20