From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: line-pixel-height beyond eol Date: Thu, 14 Sep 2017 20:53:45 +0300 Message-ID: <83poatmaja.fsf@gnu.org> References: <83a820q7a3.fsf@gnu.org> <20170913.092430.784440060052023776.tkk@misasa.okayama-u.ac.jp> <83shfqobxv.fsf@gnu.org> <20170914.081426.783469864848954364.tkk@misasa.okayama-u.ac.jp> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1505411760 5407 195.159.176.226 (14 Sep 2017 17:56:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 14 Sep 2017 17:56:00 +0000 (UTC) Cc: emacs-devel@gnu.org To: Tak Kunihiro Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Sep 14 19:55:55 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dsYMk-0001Gw-L5 for ged-emacs-devel@m.gmane.org; Thu, 14 Sep 2017 19:55:54 +0200 Original-Received: from localhost ([::1]:49195 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsYMr-00033U-OM for ged-emacs-devel@m.gmane.org; Thu, 14 Sep 2017 13:56:01 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47802) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsYLA-0001Bw-9v for emacs-devel@gnu.org; Thu, 14 Sep 2017 13:54:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dsYL5-0001ho-Rv for emacs-devel@gnu.org; Thu, 14 Sep 2017 13:54:16 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:54116) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsYL5-0001hZ-On; Thu, 14 Sep 2017 13:54:11 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1319 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1dsYL3-0005OC-5d; Thu, 14 Sep 2017 13:54:11 -0400 In-reply-to: <20170914.081426.783469864848954364.tkk@misasa.okayama-u.ac.jp> (message from Tak Kunihiro on Thu, 14 Sep 2017 08:14:26 +0900 (JST)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:218282 Archived-At: > Date: Thu, 14 Sep 2017 08:14:26 +0900 (JST) > Cc: emacs-devel@gnu.org, tkk@misasa.okayama-u.ac.jp > From: Tak Kunihiro > > (progn (vertical-motion 1) > (dolist (vs (number-sequence 1 (1- (save-excursion > (goto-char (window-start)) > (line-pixel-height))))) > (set-window-vscroll nil vs t) (sit-for 0.01)) > (scroll-up 1)) > > Let's assume a line with image of height 144 pixel is located on the > top line. When auto-hscroll-mode is off and (current-column) is large > (the 144 pixel image is scrolled left), the top line looks 27 pixel > height but (line-pixel-height) returns 144 pixel. The inconsistency > results in jump. Would it help not to use the height of the top window line, but instead simply use the value returned by frame-char-height? That takes its value from the frame's default font, and so should be independent on what's in the window.