From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Display of undisplayable characters: \U01F3A8 instead of diamond Date: Sun, 28 Aug 2022 10:07:00 +0000 Message-ID: References: <834jxxymbp.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29326"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Aug 28 12:08:48 2022 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 1oSFDk-0007Wp-7a for ged-emacs-devel@m.gmane-mx.org; Sun, 28 Aug 2022 12:08:48 +0200 Original-Received: from localhost ([::1]:58626 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oSFDi-0005qE-Ju for ged-emacs-devel@m.gmane-mx.org; Sun, 28 Aug 2022 06:08:46 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSFCG-0004Qu-HN for emacs-devel@gnu.org; Sun, 28 Aug 2022 06:07:16 -0400 Original-Received: from mail.muc.de ([193.149.48.3]:11747) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSFCE-0006M4-AZ for emacs-devel@gnu.org; Sun, 28 Aug 2022 06:07:16 -0400 Original-Received: (qmail 8259 invoked by uid 3782); 28 Aug 2022 12:07:01 +0200 Original-Received: from acm.muc.de (p2e5d5a4e.dip0.t-ipconnect.de [46.93.90.78]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Sun, 28 Aug 2022 12:07:00 +0200 Original-Received: (qmail 5644 invoked by uid 1000); 28 Aug 2022 10:07:00 -0000 Content-Disposition: inline In-Reply-To: <834jxxymbp.fsf@gnu.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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:294229 Archived-At: Hello, Eli. On Sun, Aug 28, 2022 at 08:22:02 +0300, Eli Zaretskii wrote: > > From: Richard Stallman > > Cc: emacs-devel@gnu.org > > Date: Sun, 28 Aug 2022 00:04:53 -0400 > > > It disturbs me most whilst reading info. Modern versions of makeinfo > > > generate Unicode punctuation characters, and having them displayed on > > > the screen as \Uxxxx completely screws up the alignment these characters > > > are meant to achieve (for example). > > Can we modify info.el so as to display those characters > > as the curresponding ASCII punctuation characters? > It already does, where an ASCII equivalent exists. See > info-symbols-and-replacements. Alan didn't report any details, so I > don't have any idea why it doesn't work for him (if indeed it doesn't). I didn't actually know about that feature, which you added in October 2019 (commit 8dd18bbb6f3c09a4988cf2e06378aa24b098fb85). It fails on my Linux console because of a guarding clause in the `unless' which surrounds the initialisation of buffer-display-table: (unless (or (display-multi-font-p) (coding-system-equal <==================== (coding-system-base (terminal-coding-system)) <========== 'utf-8)) <==================== (dolist (elt info-symbols-and-replacements) (let ((ch (car elt)) (repl (cdr elt))) (or (char-displayable-p ch) (aset (or buffer-display-table (setq buffer-display-table (make-display-table))) ch (vconcat (mapcar (lambda (c) (make-glyph-code c 'homoglyph)) repl))))))) On my setup that (coding-system-equal .... 'utf-8) returns t, so buffer-display-table never gets initialised. Why is that coding-system-equal form there? I think the mechanism would work on my system if it weren't (though I haven't tried it, yet). -- Alan Mackenzie (Nuremberg, Germany).