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#45557: 27.1; Incorrect rendering of COMBINING OVERLINE Date: Thu, 31 Dec 2020 17:14:53 +0200 Message-ID: <83r1n6gg7m.fsf@gnu.org> References: <87pn2rmmun.fsf@cam.ac.uk> <834kk2hyxr.fsf@gnu.org> <87v9cixdx2.fsf@cam.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21761"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 45557@debbugs.gnu.org, sje30@cam.ac.uk To: Stephen Eglen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Dec 31 16:16:11 2020 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 1kuzgQ-0005YK-Un for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 31 Dec 2020 16:16:10 +0100 Original-Received: from localhost ([::1]:58416 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kuzgP-00019e-Jd for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 31 Dec 2020 10:16:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53176) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kuzgI-00019O-69 for bug-gnu-emacs@gnu.org; Thu, 31 Dec 2020 10:16:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:58001) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kuzgH-0005Li-VI for bug-gnu-emacs@gnu.org; Thu, 31 Dec 2020 10:16:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kuzgH-0008VH-QI for bug-gnu-emacs@gnu.org; Thu, 31 Dec 2020 10:16:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 31 Dec 2020 15:16:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 45557 X-GNU-PR-Package: emacs Original-Received: via spool by 45557-submit@debbugs.gnu.org id=B45557.160942772732628 (code B ref 45557); Thu, 31 Dec 2020 15:16:01 +0000 Original-Received: (at 45557) by debbugs.gnu.org; 31 Dec 2020 15:15:27 +0000 Original-Received: from localhost ([127.0.0.1]:41311 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kuzfj-0008UC-A5 for submit@debbugs.gnu.org; Thu, 31 Dec 2020 10:15:27 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:59980) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kuzfh-0008Tz-PM for 45557@debbugs.gnu.org; Thu, 31 Dec 2020 10:15:26 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:51056) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kuzfc-00053K-5p; Thu, 31 Dec 2020 10:15:20 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1219 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kuzfV-0004VG-Ps; Thu, 31 Dec 2020 10:15:19 -0500 In-Reply-To: <87v9cixdx2.fsf@cam.ac.uk> (message from Stephen Eglen on Thu, 31 Dec 2020 14:12:25 +0000) 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:197095 Archived-At: > From: Stephen Eglen > Cc: Stephen Eglen , 45557@debbugs.gnu.org > Date: Thu, 31 Dec 2020 14:12:25 +0000 > > > If you move the cursor to x̅, does Emacs display a single cursor block > > that includes both x and the overline, or does it behave as if those > > were 2 separate glyphs? If the latter, what does Emacs show in the > > *Help* buffer if you go to the ̅ glyph and type "C-u C-x ="? > > It appears as two separate glyphs. The first is char "x" (decimal 120) > and then the second is given as below > > position: 86 of 87 (98%), column: 3 > character: ̅ (displayed as ̅) (codepoint 773, #o1405, #x305) > charset: unicode-bmp (Unicode Basic Multilingual Plane (U+0000..U+FFFF)) > code point in charset: 0x0305 > script: latin > syntax: w which means: word > category: ^:Combining > to input: type "C-x 8 RET 305" or "C-x 8 RET COMBINING OVERLINE" > buffer code: #xCC #x85 > file code: #xCC #x85 (encoded by coding system utf-8-unix) > display: by this font (glyph code) > ftcrhb:-UKWN-JuliaMono-normal-normal-normal-*-19-*-*-*-m-0-iso10646-1 (#x1F1D) And the same info about "x" also shows the same font, i.e. ftcrhb:-UKWN-JuliaMono-normal-normal-normal-*-19-*-*-*-m-0-iso10646-1 Anyway, the above means Emacs didn't compose these COMBINING OVERLINE woth "x", for some reason. The question is why.