From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#15312: Info (point-entered, point-left): Doc incomplete, hence incorrect Date: Mon, 16 Sep 2013 20:10:41 +0300 Message-ID: <83vc20pu9a.fsf@gnu.org> References: <87ppsiw22k.fsf@gmail.com> <83sixej6iz.fsf@gnu.org> <878uz573kr.fsf@gmail.com> <83fvtck8mv.fsf@gnu.org> <87hadrel77.fsf@gmail.com> <83zjrjiifl.fsf@gnu.org> <877gel1ejy.fsf@gmail.com> <87vc25z1pe.fsf@gmail.com> <83vc24hmtr.fsf@gnu.org> <83six8hfvl.fsf@gnu.org> <83ppschdqx.fsf@gnu.org> <83ob7wh6b4.fsf@gnu.org> <83hadnhpas.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1379351473 22005 80.91.229.3 (16 Sep 2013 17:11:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 16 Sep 2013 17:11:13 +0000 (UTC) Cc: 15312@debbugs.gnu.org, kjambunathan@gmail.com To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Sep 16 19:11:16 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VLcKR-0001oK-6L for geb-bug-gnu-emacs@m.gmane.org; Mon, 16 Sep 2013 19:11:15 +0200 Original-Received: from localhost ([::1]:36437 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VLcKQ-0006QJ-M7 for geb-bug-gnu-emacs@m.gmane.org; Mon, 16 Sep 2013 13:11:14 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39166) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VLcKJ-0006Px-CV for bug-gnu-emacs@gnu.org; Mon, 16 Sep 2013 13:11:12 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VLcKE-0002LU-8j for bug-gnu-emacs@gnu.org; Mon, 16 Sep 2013 13:11:07 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:33129) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VLcKE-0002LQ-4w for bug-gnu-emacs@gnu.org; Mon, 16 Sep 2013 13:11:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1VLcKE-0005Ze-0X for bug-gnu-emacs@gnu.org; Mon, 16 Sep 2013 13:11:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 16 Sep 2013 17:11:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15312 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 15312-submit@debbugs.gnu.org id=B15312.137935145621413 (code B ref 15312); Mon, 16 Sep 2013 17:11:01 +0000 Original-Received: (at 15312) by debbugs.gnu.org; 16 Sep 2013 17:10:56 +0000 Original-Received: from localhost ([127.0.0.1]:41422 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VLcK7-0005ZI-Ra for submit@debbugs.gnu.org; Mon, 16 Sep 2013 13:10:56 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:53167) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VLcK5-0005Z3-Aq for 15312@debbugs.gnu.org; Mon, 16 Sep 2013 13:10:54 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0MT800G00ADVXH00@a-mtaout21.012.net.il> for 15312@debbugs.gnu.org; Mon, 16 Sep 2013 20:10:45 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MT800GLDADXR770@a-mtaout21.012.net.il>; Mon, 16 Sep 2013 20:10:45 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:78457 Archived-At: > From: Stefan Monnier > Cc: kjambunathan@gmail.com, 15312@debbugs.gnu.org > Date: Mon, 16 Sep 2013 12:15:27 -0400 > > > Perhaps we need to step back and talk about the situations where these > > hooks are supposed to be used. Because I cannot see any sense in > > calling the hooks when the values of these properties don't change. > > Agreed, but the code also runs the hook when the value of the > `point-entered' does not change but the value of some unrelated > property changes. That is an error. Of course. But I was trying to say that we should formulate a clear specification for when these hooks shall be called. What the manual says now makes little sense to me (and is also somewhat vague). > >> The right thing to do is to declare point-entered and point-left > >> properties as obsolete and replace them by something like cursor-entered > >> and cursor-left properties which are only checked at command boundaries > >> (or better, checked just before redisplay). > > Redisplay can be forced as part of a command. > > I know, and I think that for most uses of these kinds of properties we'd > also want to run the hook when redisplay is called in the middle of > a command (e.g. in the middle of query-replace). Note that we'd probably > also want to run the hook when redisplay is short-circuited by pending input. Calling this from redisplay might need some non-trivial protocol, because the hook can legitimately move point, which will re-enter redisplay, which will call the hook...