From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Pixel-based display functions Date: Sun, 01 Feb 2015 19:31:43 +0200 Message-ID: <838ughilmo.fsf@gnu.org> References: <87k306pfi9.fsf@building.gnus.org> <87egqekrd7.fsf@building.gnus.org> <877fw53eat.fsf@building.gnus.org> <877fw4zsdv.fsf@building.gnus.org> <831tmcn4k4.fsf@gnu.org> <87386szq1w.fsf@building.gnus.org> <83wq44ljm9.fsf@gnu.org> <87vbjowlqv.fsf@building.gnus.org> <83oapglbx6.fsf@gnu.org> <83lhkkl23i.fsf@gnu.org> <83bnlgkl1s.fsf@gnu.org> <837fw3l7uz.fsf@gnu.org> <54CD4B27.4080201@gmx.at> <874mr6qvi5.fsf@building.gnus.org> <87sieqpfxh.fsf@building.gnus.org> <54CDE908.7050908@gmx.at> <87ioflq0dz.fsf@building.gnus.org> <54CE2187.9070003@gmx.at> <83lhkhiq8t.fsf@gnu.org> <54CE54A3.1020707@gmx.at> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1422811946 571 80.91.229.3 (1 Feb 2015 17:32:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 1 Feb 2015 17:32:26 +0000 (UTC) Cc: larsi@gnus.org, monnier@iro.umontreal.ca, emacs-devel@gnu.org To: martin rudalics Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Feb 01 18:32:24 2015 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 1YHyNj-0000wt-Mt for ged-emacs-devel@m.gmane.org; Sun, 01 Feb 2015 18:32:23 +0100 Original-Received: from localhost ([::1]:51280 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHyNj-0005b4-2R for ged-emacs-devel@m.gmane.org; Sun, 01 Feb 2015 12:32:23 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33680) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHyNT-0005a4-Bk for emacs-devel@gnu.org; Sun, 01 Feb 2015 12:32:10 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YHyNP-0001bt-Qu for emacs-devel@gnu.org; Sun, 01 Feb 2015 12:32:07 -0500 Original-Received: from mtaout26.012.net.il ([80.179.55.182]:57620) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YHyNP-0001bp-Jr for emacs-devel@gnu.org; Sun, 01 Feb 2015 12:32:03 -0500 Original-Received: from conversion-daemon.mtaout26.012.net.il by mtaout26.012.net.il (HyperSendmail v2007.08) id <0NJ300100SM4GU00@mtaout26.012.net.il> for emacs-devel@gnu.org; Sun, 01 Feb 2015 19:32:00 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout26.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NJ300JGTSPCRM60@mtaout26.012.net.il>; Sun, 01 Feb 2015 19:32:00 +0200 (IST) In-reply-to: <54CE54A3.1020707@gmx.at> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.182 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:182197 Archived-At: > Date: Sun, 01 Feb 2015 17:30:27 +0100 > From: martin rudalics > CC: larsi@gnus.org, monnier@iro.umontreal.ca, emacs-devel@gnu.org > > > Maybe I misunderstand what Lars wants to do, but I think > > window-text-pixel-size is the wrong tool for the job: it returns the > > pixel size of text between 2 given positions, whereas Lars needs the > > opposite: where is the position that produces a given pixel size. > > That's possible. But `window-text-pixel-size' would give him a way to > precalculate the sizes of chunks of his text and allow him to manually > insert linebreaks for each column. The problem, as I understand it, is to find the place where to insert these breaks, when column text is wider than the column. And window-text-pixel-size cannot tell you that, it can only tell whether the chunk of text fits or not. > > Also, there's the visual vs logical order issue I mentioned in my > > other mail. > > If `window-text-pixel-size' is kaput in that sense I'll have to fix it > anyway. It's not kaput. The problem happens only if its results are used for inserting a newline in order to break the line in two. In all other use cases, it does exactly TRT.