From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Tick Reduction Date: Thu, 25 Nov 2021 16:02:04 +0200 Message-ID: <83bl285o6b.fsf@gnu.org> References: <87bl2hyzca.fsf@gnus.org> <878rxhjlot.fsf@gnus.org> <874k85jlmq.fsf@gnus.org> <87v90khaa8.fsf@gnus.org> <83zgpwp7v2.fsf@gnu.org> <87tug4fdn7.fsf@gnus.org> <83pmqsp0m7.fsf@gnu.org> <87k0gzyy8k.fsf@gnus.org> <835ysjoupv.fsf@gnu.org> <8735nnyob1.fsf@gnus.org> <83y25fneeh.fsf@gnu.org> <87pmqrx7rh.fsf@gnus.org> <83tug3ndaj.fsf@gnu.org> <874k81vmlf.fsf@gnus.org> <83sfvl8wjw.fsf@gnu.org> <87o869y0v2.fsf@gnus.org> <83fsrl8owz.fsf@gnu.org> <87o869wkcx.fsf@gnus.org> <83bl298n9b.fsf@gnu.org> <87pmqpv1jm.fsf@gnus.org> <834k818jwm.fsf@gnu.org> <874k80fkpm.fsf@gnus.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7362"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org, stefankangas@gmail.com, dgutov@yandex.ru To: Lars Ingebrigtsen Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Nov 25 15:05:31 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 1mqFNS-0001jj-BO for ged-emacs-devel@m.gmane-mx.org; Thu, 25 Nov 2021 15:05:30 +0100 Original-Received: from localhost ([::1]:59944 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mqFNR-0005ZI-D8 for ged-emacs-devel@m.gmane-mx.org; Thu, 25 Nov 2021 09:05:29 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:48066) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mqFK8-0007y4-6b for emacs-devel@gnu.org; Thu, 25 Nov 2021 09:02:04 -0500 Original-Received: from [2001:470:142:3::e] (port=42670 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mqFK7-0001jT-Kw; Thu, 25 Nov 2021 09:02:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=wGsw0htSw6vDnGP4O2p4alJ8LmRmPkbn6KfYCtDzfuI=; b=GNTZw/1E52wG FtCmjLRBrXsQN1xF7z+k53bndNGBw309GUbbozYR+lkzFWHYh4NkqysZwphx0a1gcOAdch3TCkU/L 4gMIjxjkTXQqzuXlKzEeNB2ZKsWjZHCnusyGeBpH0XS7bPZ3Xh3evc6SqOQIMIRN5bRcn52zXMuFW UzLCp2YPDrD5Qt9wWC3S4Y1DBI0GWLlvnOfeO1vDPzyJWvaJ8JVECRheJiEtBWDCjrw9Yn8leJTFA OUdYvt4pJh9BGGrcSHC8JJQ2DIBCfmhpXR4co1TjAfD/z/P5MM2Bqc9QDOro2xcoK+qDkINxgRawm pRq/Amuz4y/7RT+Jfxxj8A==; Original-Received: from [87.69.77.57] (port=1152 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mqFK7-0006Nf-AC; Thu, 25 Nov 2021 09:02:03 -0500 In-Reply-To: <874k80fkpm.fsf@gnus.org> (message from Lars Ingebrigtsen on Thu, 25 Nov 2021 14:06:45 +0100) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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:280124 Archived-At: > From: Lars Ingebrigtsen > Cc: dgutov@yandex.ru, stefankangas@gmail.com, emacs-devel@gnu.org > Date: Thu, 25 Nov 2021 14:06:45 +0100 > > The one remaining problem I have now is with the mode line -- the > display handlers aren't called in all circumstances, and I don't quite > understand why. > > With this: > > (defvar mode-line-position > `((:propertize > (" " mode-line-percent-position) > display (min-width (6.0)) > > handle_display_prop is called (via next_element_from_string) as you'd > expect, and everything works fine. However, if you just have: > > (defvar mode-line-position > `((:propertize > mode-line-percent-position > display (min-width (6.0)) > > handle_display_prop is never called. The value of mode-line-percent-position is '(-3 "%p"). So in the second example you propertize the thing which Emacs produces from the %p mode-line format. But %p produces a C string, and C strings cannot have text properties. That's why handle_display_prop isn't called: it is never called for C strings we display. Bottom line: to put text properties on stuff we display on the mode line, you need to make sure that stuff is a Lisp string.