From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38181: Actual height of mode-line not taken into account Date: Sat, 16 Nov 2019 10:35:50 +0200 Message-ID: <83pnhs6wwp.fsf@gnu.org> References: <87eeyd3ul0.fsf@bernoul.li> <83d0dt2qt6.fsf@gnu.org> <83r2290w24.fsf@gnu.org> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="222062"; mail-complaints-to="usenet@blaine.gmane.org" Cc: jonas@bernoul.li, 38181@debbugs.gnu.org To: martin rudalics Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Nov 16 09:37:21 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iVta5-000veJ-78 for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 Nov 2019 09:37:21 +0100 Original-Received: from localhost ([::1]:46890 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVta4-0002hQ-4g for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 Nov 2019 03:37:20 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56333) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVtZv-0002h7-OO for bug-gnu-emacs@gnu.org; Sat, 16 Nov 2019 03:37:13 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iVtZt-0004af-SR for bug-gnu-emacs@gnu.org; Sat, 16 Nov 2019 03:37:11 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:57104) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iVtZs-0004a7-2z for bug-gnu-emacs@gnu.org; Sat, 16 Nov 2019 03:37:08 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iVtZp-0000H5-1B for bug-gnu-emacs@gnu.org; Sat, 16 Nov 2019 03:37:07 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 16 Nov 2019 08:37:04 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38181 X-GNU-PR-Package: emacs Original-Received: via spool by 38181-submit@debbugs.gnu.org id=B38181.1573893366984 (code B ref 38181); Sat, 16 Nov 2019 08:37:04 +0000 Original-Received: (at 38181) by debbugs.gnu.org; 16 Nov 2019 08:36:06 +0000 Original-Received: from localhost ([127.0.0.1]:37692 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iVtYr-0000Fo-Ke for submit@debbugs.gnu.org; Sat, 16 Nov 2019 03:36:05 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:47226) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iVtYn-0000FI-HU for 38181@debbugs.gnu.org; Sat, 16 Nov 2019 03:36:04 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:46673) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iVtYh-000455-FZ; Sat, 16 Nov 2019 03:35:55 -0500 Original-Received: from [176.228.60.248] (port=1402 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iVtYg-0000fL-MR; Sat, 16 Nov 2019 03:35:55 -0500 In-reply-to: (message from martin rudalics on Sat, 16 Nov 2019 09:20:27 +0100) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:171708 Archived-At: > Cc: 38181@debbugs.gnu.org > From: martin rudalics > Date: Sat, 16 Nov 2019 09:20:27 +0100 > > > I think fit-window-to-buffer relies on window's metrics (like the > > number of lines in the text area) to be up to date, and that is only > > true after a window was redisplayed once since changing the mode-line > > height. Martin, is this correct? > > Yes. Then I'm not sure we can fix such use cases at all, without causing display flickering in much more popular use cases. Do you have any ideas for a possible fix? Could fit-window-to-buffer invoke 'redisplay' internally, perhaps? > But, as I mentioned earlier, the problem shows up with the > scroll bar immediately when Jonas' form is evaluated, see the attached > screenshot. That just means we (or a Lisp program which makes these mode-line modifications) need to recreate and redisplay the scroll bars anew in these cases, right? It's a separate problem, right?