From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Line wrap reconsidered
Date: Mon, 25 May 2020 22:23:41 +0300
Message-ID: <83r1v7vmwy.fsf@gnu.org>
References: <92FF4412-04FB-4521-B6CE-52B08526E4E5@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202";
	logging-data="58755"; mail-complaints-to="usenet@ciao.gmane.io"
Cc: emacs-devel@gnu.org
To: Yuan Fu <casouri@gmail.com>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon May 25 21:24:15 2020
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
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 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1jdIhr-000FBT-J4
	for ged-emacs-devel@m.gmane-mx.org; Mon, 25 May 2020 21:24:15 +0200
Original-Received: from localhost ([::1]:34920 helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1jdIhq-00036I-Ly
	for ged-emacs-devel@m.gmane-mx.org; Mon, 25 May 2020 15:24:14 -0400
Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53482)
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eliz@gnu.org>) id 1jdIhQ-0002fS-LF
 for emacs-devel@gnu.org; Mon, 25 May 2020 15:23:48 -0400
Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:55259)
 by eggs.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <eliz@gnu.org>)
 id 1jdIhQ-0004a3-CQ; Mon, 25 May 2020 15:23:48 -0400
Original-Received: from [176.228.60.248] (port=4474 helo=home-c4e4a596f7)
 by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256)
 (Exim 4.82) (envelope-from <eliz@gnu.org>)
 id 1jdIhP-0004PC-QI; Mon, 25 May 2020 15:23:48 -0400
In-Reply-To: <92FF4412-04FB-4521-B6CE-52B08526E4E5@gmail.com> (message from
 Yuan Fu on Mon, 25 May 2020 14:13:04 -0400)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/emacs-devel>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org
Original-Sender: "Emacs-devel"
 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
Xref: news.gmane.io gmane.emacs.devel:251384
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/251384>

> From: Yuan Fu <casouri@gmail.com>
> Date: Mon, 25 May 2020 14:13:04 -0400
> 
> Here is what I come up with: in redisplay code, instead of only checking for whitespace, check for a ‘no-wrap text-property, if the character has this property, don’t wrap before[1] this character (or maybe it can be the opposite, only wrap when the character has a ‘can-wrap property). And this text property is calculated and applied once. 

What are the use cases for such a feature?

> Is checking text property is fast enough for redisplay?

We do this all the time in the display code, so speed shouldn't be a
problem.