From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Split `simple.el'? Date: Fri, 06 Apr 2018 11:10:26 +0300 Message-ID: <83muyg21sd.fsf@gnu.org> References: <5f1e960c-483f-4902-b4c2-b7a4ca3b04f4@default> <10c96362-297f-db97-d4a9-da3d66d4dd34@cs.ucla.edu> <83in974gwf.fsf@gnu.org> <83zi2j2hp4.fsf@gnu.org> <87sh883lc4.fsf@linux-m68k.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1523002103 7822 195.159.176.226 (6 Apr 2018 08:08:23 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 6 Apr 2018 08:08:23 +0000 (UTC) Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org To: Andreas Schwab Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 06 10:08:17 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1f4MPw-0001ry-0K for ged-emacs-devel@m.gmane.org; Fri, 06 Apr 2018 10:08:16 +0200 Original-Received: from localhost ([::1]:34563 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f4MRz-0003Fy-Vt for ged-emacs-devel@m.gmane.org; Fri, 06 Apr 2018 04:10:24 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45398) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f4MRs-0003Ei-UY for emacs-devel@gnu.org; Fri, 06 Apr 2018 04:10:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f4MRo-00026Z-Jf for emacs-devel@gnu.org; Fri, 06 Apr 2018 04:10:16 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:59903) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f4MRo-00026O-Cf; Fri, 06 Apr 2018 04:10:12 -0400 Original-Received: from [176.228.60.248] (port=4499 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1f4MRn-0004HD-Bo; Fri, 06 Apr 2018 04:10:11 -0400 In-reply-to: <87sh883lc4.fsf@linux-m68k.org> (message from Andreas Schwab on Fri, 06 Apr 2018 08:22:51 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:224394 Archived-At: > From: Andreas Schwab > Date: Fri, 06 Apr 2018 08:22:51 +0200 > Cc: emacs-devel@gnu.org > > On Apr 05 2018, Stefan Monnier wrote: > > > This could be considered a bug: maybe `current-column` shouldn't need to > > lookup any font information (after all, it doesn't actually give > > pixel-precise information). > > But it needs to know whether the character is glyphless, so that it can > use glyphless-char-display. Indeed. More generally, it needs to check character compositions, and that requires involving the font back-end, which needs to look up a font for each character from the beginning of the line to point.