From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: David Kastrup Newsgroups: gmane.emacs.devel Subject: Re: Overlay mechanic improvements Date: Sat, 20 Sep 2014 15:37:23 +0200 Organization: Organization?!? Message-ID: <871tr6qup8.fsf@fencepost.gnu.org> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1411220289 3007 80.91.229.3 (20 Sep 2014 13:38:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 20 Sep 2014 13:38:09 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Sep 20 15:38:03 2014 Return-path: Envelope-to: ged-emacs-devel@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 1XVKrN-0003Rj-Gu for ged-emacs-devel@m.gmane.org; Sat, 20 Sep 2014 15:37:57 +0200 Original-Received: from localhost ([::1]:34636 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XVKrN-0007gL-3B for ged-emacs-devel@m.gmane.org; Sat, 20 Sep 2014 09:37:57 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46069) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XVKrE-0007fv-7D for emacs-devel@gnu.org; Sat, 20 Sep 2014 09:37:54 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XVKr7-0007mq-9F for emacs-devel@gnu.org; Sat, 20 Sep 2014 09:37:48 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:34471) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XVKr7-0007mS-2w for emacs-devel@gnu.org; Sat, 20 Sep 2014 09:37:41 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XVKqz-0003I1-Gf for emacs-devel@gnu.org; Sat, 20 Sep 2014 15:37:33 +0200 Original-Received: from x2f444a0.dyn.telefonica.de ([2.244.68.160]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Sep 2014 15:37:33 +0200 Original-Received: from dak by x2f444a0.dyn.telefonica.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Sep 2014 15:37:33 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 27 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: x2f444a0.dyn.telefonica.de X-Face: 2FEFf>]>q>2iw=B6, xrUubRI>pR&Ml9=ao@P@i)L:\urd*t9M~y1^:+Y]'C0~{mAl`oQuAl \!3KEIp?*w`|bL5qr,H)LFO6Q=qx~iH4DN; i"; /yuIsqbLLCh/!U#X[S~(5eZ41to5f%E@'ELIi$t^ Vc\LWP@J5p^rst0+('>Er0=^1{]M9!p?&:\z]|;&=NP3AhB!B_bi^]Pfkw User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) Cancel-Lock: sha1:LUHvuMTtSKUlaItBjgilEl+YeFY= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:174580 Archived-At: Richard Stallman writes: > [[[ To any NSA and FBI agents reading my email: please consider ]]] > [[[ whether defending the US Constitution against all enemies, ]]] > [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > I don't see that it makes sense to store overlays like text properties. > The existing data structure is fine for overlays used as they are intended > to be used. preview-latex extensively uses overlays (and they can easily grow to a few thousand per document in a mathematically oriented paper), and it is very clearly _overlays_ which are wanted here since the associated images are only correct in the context and position of a particular document and would not make any sense at all to copy and paste. Quadratic behavior for the markers used as start- and end markers is clearly undesirable. Naturally, this could be addressed by changing the data structures/algorithms for updating markers (thus killing two birds with one stone). But whether solved together with marker behavior or not, this is worth addressing. -- David Kastrup