From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#20146: font-lock-extend-jit-lock-region-after-change: results are discarded instead of being returned. Date: Fri, 20 Mar 2015 15:39:10 -0400 Message-ID: References: <20150319230136.GC2753@acm.fritz.box> <20150320160744.GA3493@acm.fritz.box> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1426880429 13686 80.91.229.3 (20 Mar 2015 19:40:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 20 Mar 2015 19:40:29 +0000 (UTC) Cc: 20146@debbugs.gnu.org To: Alan Mackenzie Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 20 20:40:18 2015 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 1YZ2mD-0003VV-G5 for geb-bug-gnu-emacs@m.gmane.org; Fri, 20 Mar 2015 20:40:13 +0100 Original-Received: from localhost ([::1]:45475 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZ2mD-0001ub-0a for geb-bug-gnu-emacs@m.gmane.org; Fri, 20 Mar 2015 15:40:13 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39527) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZ2m7-0001pc-FN for bug-gnu-emacs@gnu.org; Fri, 20 Mar 2015 15:40:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YZ2m3-0002yF-8d for bug-gnu-emacs@gnu.org; Fri, 20 Mar 2015 15:40:07 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:41369) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZ2m3-0002xS-69 for bug-gnu-emacs@gnu.org; Fri, 20 Mar 2015 15:40:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1YZ2m2-0003WX-KL for bug-gnu-emacs@gnu.org; Fri, 20 Mar 2015 15:40:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 20 Mar 2015 19:40:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20146 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 20146-submit@debbugs.gnu.org id=B20146.142688035413440 (code B ref 20146); Fri, 20 Mar 2015 19:40:02 +0000 Original-Received: (at 20146) by debbugs.gnu.org; 20 Mar 2015 19:39:14 +0000 Original-Received: from localhost ([127.0.0.1]:59378 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YZ2lG-0003Uf-4N for submit@debbugs.gnu.org; Fri, 20 Mar 2015 15:39:14 -0400 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:52799) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1YZ2lC-0003UL-1Z for 20146@debbugs.gnu.org; Fri, 20 Mar 2015 15:39:11 -0400 Original-Received: from ceviche.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id t2KJd6bx023400; Fri, 20 Mar 2015 15:39:07 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id B93AF66144; Fri, 20 Mar 2015 15:39:10 -0400 (EDT) In-Reply-To: <20150320160744.GA3493@acm.fritz.box> (Alan Mackenzie's message of "Fri, 20 Mar 2015 16:07:44 +0000") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 1 Rules triggered RV5251=0 X-NAI-Spam-Version: 2.3.0.9393 : core <5251> : inlines <2455> : streams <1408748> : uri <1885785> 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:100722 Archived-At: > Perhaps we could implement the convention that when a major mode has > positively set the font-lock region's start and end points, these should > be accepted by F/J-lock, but when not, F/J-lock should be free to alter > them (as it typically does now). No the core of the API is font-lock-fontify-region and it should work with *any* bounds (i.e. if these need to be extended, it should be done by font-lock-extend-region-function). Jit-lock is implemented on top of that API and is hence free to use any bounds it sees fit. If you rely on more specific bounds being passed to font-lock-fontify-region, that means you have a problem on your side. > The existence of font-lock-extend-after-change-region-function makes > this distinction possible. The existence of font-lock-extend-after-change-region-function is an error on my part (More specifically the result of a weakness on my part: when you requested this feature, I added font-lock-extend-region-function (which was the right fix) and reluctantly accepted to also add font-lock-extend-after-change-region-function just out of tiredness of arguing that it was the wrong solution). Stefan