From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Juri Linkov Newsgroups: gmane.emacs.devel Subject: Re: on helm substantial differences Date: Sun, 22 Nov 2020 22:11:01 +0200 Organization: LINKOV.NET Message-ID: <87blfp2luy.fsf@mail.linkov.net> References: <87wnymda5g.fsf@mail.linkov.net> <87ima5he8j.fsf@mail.linkov.net> <87mtzfzt9a.fsf@mail.linkov.net> <87lfezd8r0.fsf@mail.linkov.net> <87k0uj58ub.fsf@mail.linkov.net> <87lfey28us.fsf@tcd.ie> <87ft56h6sr.fsf@mail.linkov.net> <87y2iybe27.fsf@mail.linkov.net> <873614ido7.fsf@mail.linkov.net> <83tutkz1ea.fsf@gnu.org> <83sg94z0ku.fsf@gnu.org> <87zh3aqxa7.fsf@mail.linkov.net> <83sg92xdz6.fsf@gnu.org> <87sg914wlp.fsf@mail.linkov.net> <83lfetxvuv.fsf@gnu.org> 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="30570"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu) Cc: spacibba@aol.com, bugs@gnu.support, andreyk.mad@gmail.com, emacs-devel@gnu.org, contovob@tcd.ie, rudalics@gmx.at, monnier@iro.umontreal.ca, ghe@sdf.org, drew.adams@oracle.com To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Nov 22 21:16:13 2020 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 1kgvmO-0007q1-Um for ged-emacs-devel@m.gmane-mx.org; Sun, 22 Nov 2020 21:16:12 +0100 Original-Received: from localhost ([::1]:48494 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kgvmO-00064t-1Y for ged-emacs-devel@m.gmane-mx.org; Sun, 22 Nov 2020 15:16:12 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43006) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kgvlE-0004vj-Bs for emacs-devel@gnu.org; Sun, 22 Nov 2020 15:15:00 -0500 Original-Received: from relay5-d.mail.gandi.net ([217.70.183.197]:39895) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kgvlC-0007Zp-Eb; Sun, 22 Nov 2020 15:15:00 -0500 X-Originating-IP: 91.129.97.46 Original-Received: from mail.gandi.net (m91-129-97-46.cust.tele2.ee [91.129.97.46]) (Authenticated sender: juri@linkov.net) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 1270B1C0004; Sun, 22 Nov 2020 20:14:44 +0000 (UTC) In-Reply-To: <83lfetxvuv.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 22 Nov 2020 17:19:20 +0200") Received-SPF: pass client-ip=217.70.183.197; envelope-from=juri@linkov.net; helo=relay5-d.mail.gandi.net 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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:259651 Archived-At: >> 𒐫 CUNEIFORM NUMERIC SIGN NINE SHAR2 > > On GUI frames, this depends on the font in use. You cannot really > rely on char-width to solve this. > >> Maybe there is another function that could return the real number of >> tab columns a character takes on the screen? > > There is: font-get-glyphs. But I'd recommend to just use a TAB of a > suitable width instead of dealing with the complexity that > font-get-glyphs requires. I can't find a suitable width for TAB: 5 makes a too wide gap between a character and its name, and with 4 some characters are misaligned. But despite the complexity of font-get-glyphs, is it reasonably fast? I tried to rely on next-line that moves to the beginning of the line on the character wider that a previous character on the previous line, and keep increasing the current column while moving over all character lines: (with-temp-buffer (dotimes (c (max-char)) (insert c ?\n)) (insert "1234567890\n") (goto-char (point-min)) (dotimes (c (max-char)) (when (bolp) (forward-char)) (next-line)) (current-column)) But it takes too much time on all characters.