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.bugs Subject: bug#41454: 28.0.50; [".+" 0 font-shape-gstring] composition rule breaks paren highlighting Date: Sun, 31 May 2020 21:01:44 +0300 Message-ID: <83mu5oj853.fsf@gnu.org> References: <83r1v0j8og.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="18551"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 41454@debbugs.gnu.org To: pipcet@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun May 31 20:02:22 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 1jfSHu-0004mH-0H for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 31 May 2020 20:02:22 +0200 Original-Received: from localhost ([::1]:34958 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jfSHt-0004jp-23 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 31 May 2020 14:02:21 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37980) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jfSHa-0004iu-C6 for bug-gnu-emacs@gnu.org; Sun, 31 May 2020 14:02:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50502) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jfSHa-0001Zg-1v for bug-gnu-emacs@gnu.org; Sun, 31 May 2020 14:02:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jfSHa-0003a3-0A for bug-gnu-emacs@gnu.org; Sun, 31 May 2020 14:02:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 31 May 2020 18:02:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 41454 X-GNU-PR-Package: emacs Original-Received: via spool by 41454-submit@debbugs.gnu.org id=B41454.159094811413749 (code B ref 41454); Sun, 31 May 2020 18:02:01 +0000 Original-Received: (at 41454) by debbugs.gnu.org; 31 May 2020 18:01:54 +0000 Original-Received: from localhost ([127.0.0.1]:33815 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jfSHS-0003Zh-3N for submit@debbugs.gnu.org; Sun, 31 May 2020 14:01:54 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:58716) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jfSHQ-0003ZU-K6 for 41454@debbugs.gnu.org; Sun, 31 May 2020 14:01:52 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:58045) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jfSHL-0001Qy-9T; Sun, 31 May 2020 14:01:47 -0400 Original-Received: from [176.228.60.248] (port=1525 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jfSHI-0008N4-Tz; Sun, 31 May 2020 14:01:46 -0400 In-Reply-To: <83r1v0j8og.fsf@gnu.org> (message from Eli Zaretskii on Sun, 31 May 2020 20:50:07 +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:181312 Archived-At: > Date: Sun, 31 May 2020 20:50:07 +0300 > From: Eli Zaretskii > Cc: 41454@debbugs.gnu.org > > The problem is that the entire sequence of characters that matches > the regexp is passed to the shaper, and the result is stored as a > single composition. And we have special code in the display engine > not to break sequences of potentially-composed characters when > handling faces (see compute_stop_pos). So I think there might be > some bug there which shows when a composition comprises more than a > single grapheme cluster, and some face is applied to them. On second thought, I'm not sure this is the right place to look at. It could be fill_gstring_glyph_string and BUILD_GSTRING_GLYPH_STRING instead (and the respective *term.c display functions).