From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu Newsgroups: gmane.emacs.help Subject: Re: Correct way to implement `pixel-point-and-height-at-unseen-line'? Date: Tue, 14 Dec 2021 21:48:35 +0800 Message-ID: <871r2fthzg.fsf@yahoo.com> References: <87pmq1wag9.fsf.ref@yahoo.com> <87pmq1wag9.fsf@yahoo.com> <838rwomv73.fsf@gnu.org> <87czm0uifx.fsf@yahoo.com> <83bl1jl3ej.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="18922"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.60 (gnu/linux) Cc: help-gnu-emacs@gnu.org To: Eli Zaretskii Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Dec 14 15:04:24 2021 Return-path: Envelope-to: geh-help-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 1mx8Pn-0004SB-KA for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 14 Dec 2021 15:04:23 +0100 Original-Received: from localhost ([::1]:56752 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mx8Pl-0007Wy-Jw for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 14 Dec 2021 09:04:21 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:56798) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mx8Ai-0007d5-7w for help-gnu-emacs@gnu.org; Tue, 14 Dec 2021 08:48:48 -0500 Original-Received: from sonic315-20.consmr.mail.ne1.yahoo.com ([66.163.190.146]:35467) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mx8Ag-0006eB-C1 for help-gnu-emacs@gnu.org; Tue, 14 Dec 2021 08:48:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1639489724; bh=QabjNzKKSm9HIYKscYm1jGpfFutXnyJAS771M89lFkg=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From:Subject:Reply-To; b=l38hprGY2ugssr6QPnvkc07GEEwn7zIJMdp4Ao6Tswg/nXAYYw/H5ueS4REEzWocsDS114QmEuZYQ8IffxWs5R7vBeaiTtt5DItWYfnDMVpIlZ1q0zL12GuCOzTaG8x/sWrEHyo0EIU0ySNtKNUaQlUjcIq140RF5T05vSmFXFKGBbxVe8XFBF0eF7usxRcvNW3anFz7v5dXyG95d0/UFP9HPX++RH+OCYOgUi/+ImmHxqTxpX8wYeHhHZY4uQOZuP2KpopBUEtC5+kB9qN54cPCShhvtWaTw9wkdJlgrVJDgcwcyXTSdRb8TeZ8MxOoD0H+nkZ1BKTFeQbz1TpCXQ== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1639489724; bh=tW7mTqMT3VP+SVXDgsKGtKbNHDoBtTgXPa3QvqsrsR8=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=NilSojgkCUy/4hQ0O1IclXjpFYiK3bAdiMwRUPlmbxlkiuDWn0d1b2heGyvRpI2JR595m5Mc5C4CYgP30YJnUF3cEB3l1ZTgVAXFrUb4qRZImxnyI7wxQPuVGNh4PV3v/lEM2lg0HkgyvAEchbGfsdD7WGxnjYkG0y3x2Ly1+Z9RSv78aSZ+u3S8846cnNuiS9w0ZMBTWbPAcf+v2puH6rDRU+yhVfSu0lh3hLPg2h/UZeNqKkAB8akYfTw0+h17w7drlUWl1xQOyHYXWfc0Upwx4ZLXxxH0+58lEMDuOL4OBO+rUWaDLapGVoEP4YBUPHCdXkGXq7psZ/8IShP0Jg== X-YMail-OSG: RMZyLU4VM1k7ik83FGSxewdNVr4kjsRTNGLJyp_kirdRKKMbojCERHLiztTvGhM rz00T6ScEIqcnsjfiDPbax7Alb7ga6dWt5ndiprX5UySrj0MZ7eGvitD8pUWqdJgGwoQiSGTHG8D Deh5GEUp9s_2r4z0ZOzxNCKYfalfWH4m4yGRAXi_GPCvH1b7kz5iI8dM_sYZZx6DfeG.3PYeWj5q EcwIth_rWXsIvnkSf5UldNaFVPoRA6qb7._fcdCd7AQ1DSlWEhZ_EBkO17.HDdwm4sVJULEqEPkI f9LsoZE9KbkZlHzdtNIhjR9yenhyZjQ5ZiqEVz5RX8pnwYHw90KyDOzU1hP28I.s0zgUQ.xq4xPj r9MElhiMcVvyBhflseyxxxva7TI0QKb8VK2Is9CJxw6lQVdlaedCWp4GF7SBOgrF3feyduorivMH 9JlWynwMeQSrTCfsSP_b1szBK4ceCjfwEf1cJ_bqQODw46NXi.B3W658eC3UJelUDSos3ZvjggFE PzuMzS8lCa2EWAW.EsnWtrfC6.ipNg2IpGnaN2mxvqDkxI4mG3rtiMazZzrlg4TQMYKS.cPYvl30 ekJfi7b507KCECKKfVINv4gvoWPsmloNTX_NwphX0v3bF6LLADjv4etiWPaSAYxsaRVARekZ.z5I W.gzIH4q_a6irvCEcNmU4WI9czKpcp88VAy_1_OboHrCOff5cnAeSkhh7IxZZNwa6HSNgc2pvAga vuF2H53rrvSZ7GlvZeqBZcNe6BEm7bLRcP3JI6ydISsyXsIm86N.csFh5aUQT34O6dd6lTl5dlQj 152Yd.tMcmOnl9h2SaPiHgS4KyHcm3MgUlZGN9itBG X-Sonic-MF: Original-Received: from sonic.gate.mail.ne1.yahoo.com by sonic315.consmr.mail.ne1.yahoo.com with HTTP; Tue, 14 Dec 2021 13:48:44 +0000 Original-Received: by kubenode512.mail-prod1.omega.sg3.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 01499d410e9483c0902d84195acfb0d6; Tue, 14 Dec 2021 13:48:40 +0000 (UTC) In-Reply-To: <83bl1jl3ej.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 14 Dec 2021 15:30:44 +0200") X-Mailer: WebService/1.1.19415 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Received-SPF: pass client-ip=66.163.190.146; envelope-from=luangruo@yahoo.com; helo=sonic315-20.consmr.mail.ne1.yahoo.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:134974 Archived-At: Eli Zaretskii writes: > Did you try something like this: > > (save-excursion > (goto-char (window-start)) > (vertical-motion (- (ceiling N (frame-char-height)))) > (point)) > > where N is your number of pixels? That won't always work correctly with lines of different height: for example, if the line above start is smaller than the default character height of the frame, the number of lines by which to move upwards could be too small.