From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Entering emojis Date: Sat, 30 Oct 2021 14:25:47 +0200 Message-ID: <87r1c2r96c.fsf@gnus.org> References: <87cznths5j.fsf@gnus.org> <87ilxi7531.fsf@gnus.org> <875yth7bjr.fsf@gnus.org> <8335oltgyd.fsf@gnu.org> <837ddws6p5.fsf@gnu.org> <87zgqrsdwg.fsf@gnus.org> <87v91fschk.fsf@gnus.org> <83mtmrox0k.fsf@gnu.org> <83k0hvow7b.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2773"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: mardani29@yahoo.es, stefankangas@gmail.com, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Oct 30 14:28:37 2021 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 1mgnTQ-0000VS-UD for ged-emacs-devel@m.gmane-mx.org; Sat, 30 Oct 2021 14:28:36 +0200 Original-Received: from localhost ([::1]:55892 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mgnTO-000692-Pn for ged-emacs-devel@m.gmane-mx.org; Sat, 30 Oct 2021 08:28:34 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39598) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mgnQr-0004gH-9R for emacs-devel@gnu.org; Sat, 30 Oct 2021 08:25:58 -0400 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:46932) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mgnQo-0005Fj-Tq; Sat, 30 Oct 2021 08:25:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=EkFUvJEIRUqy2xl3ZkB5ir12KCNssQEBwjYqu05FS/0=; b=PVCHb/uunR6Hzc18GeiE7bpfPD qVqiIXvT6SC7QgHSnvOBBJh9Aknpm9MLbWhquV7xhqNSucyH6lVdH718A8JHWwhsnHjEHC8bxLyuS yTP1etRu0c7UXo8todlf1ZrIduVO3F/w1fb1nGBGW/bKc1FsbOX1tYUrClVH15LSz8gw=; Original-Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mgnQj-0001DV-6R; Sat, 30 Oct 2021 14:25:52 +0200 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAMAAABg3Am1AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAM1BMVEVrV1d+gIKdk5zJ u8GEe4x6c4tSQD7l18lPNjXSsZvw2qeZalrNoGjfmmfKdEQeGR////8FrYCZAAAAAWJLR0QQlbIN LAAAAAd0SU1FB+UKGw0wJkJmyPMAAAFNSURBVEjHtdThroMgDAVgUEQQlPd/20sLaEEK7sc9ycwW zwfFLROiipTLKDJWlq+RUuKaK2TYVJgNUwBrnuoLrPPlAegH8ILuQAEr4iAbnhfBvk6Iqg4dwV6R lQEbBY0ZPlaTQUUGgoD901gU7D8DIizzqFQNHjIExxGbB15R2BQWHJAE8K21I1EAiWXEopxaxoAK hcK5rwC6mDGwX4C1PeFYUPetX7yHB8QB0vTxFa8QRxJ/3hyImQJonhC4+hLXgPwFH7l3p1fHM+xZ nFX82Wm7+D9QwNn0IderzQJ/QTp1oY149a+Sdx0Bmf/qdenyMQCwO6vrHCOGSzdtBBdNr66rEMCv bUoQBEMCN3W6o0s33MHbItAY3aRZzLyBgGl0mamja5DZM/J7tx5IJlTknowB1V6lnmYO4QMxRcxB eMrp0xS0/t/B/AzNBvoPMJFHWqlJmBgAAAAldEVYdGRhdGU6Y3JlYXRlADIwMjEtMTAtMjdUMTM6 NDg6MzgrMDA6MDBpvaaMAAAAJXRFWHRkYXRlOm1vZGlmeQAyMDIxLTEwLTI3VDEzOjQ4OjM4KzAw OjAwGOAeMAAAAABJRU5ErkJggg== X-Now-Playing: Tyme's _To the Dawn_: "Morning Light (Klute Remix)" In-Reply-To: <83k0hvow7b.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 30 Oct 2021 09:36:40 +0300") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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:278272 Archived-At: Eli Zaretskii writes: > And I see that there is, indeed, a bug (or a missing feature) in > truncate-string-to-width: its algorithm assumes that string-width > returns a number that is the sum of char-width values for its > constituent characters, which is not necessarily true when > character-composition is involved. (I should have read the entire thread before responding to the previous email, I see.) > It needs instead to consider string-width values on subsequent > substrings. It also cannot assume that string-width is monotonically > increasing in the number of characters in the substring, as that, too, > could be false when character-composition is involved. Yup. > Again, this is nothing specific to Emoji, this can happen with any > composed text, for example any ligature that produces a single glyph > from 2 or more characters. I was idly speculating whether the current truncate-string-to-width behaviour is "right" in some sense, and we'd have to introduce some new primitives here, but I guess not. But perhaps we should have one new primitive here -- something like string-glyph-split -- that would split a string into a list of strings where each string represents a complete glyph. I think that might be useful for people who are composing displays by chopping things off the start/end of strings, for instance. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no