From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: changing visuals of code in emacs Date: Sun, 12 Oct 2008 22:48:44 +0200 Organization: Informatimago Message-ID: <878wst1qvn.fsf@hubble.informatimago.com> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1223847691 4769 80.91.229.12 (12 Oct 2008 21:41:31 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 12 Oct 2008 21:41:31 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Oct 12 23:42:30 2008 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1Kp8hp-0001Yc-HS for geh-help-gnu-emacs@m.gmane.org; Sun, 12 Oct 2008 23:42:29 +0200 Original-Received: from localhost ([127.0.0.1]:47456 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Kp8gl-0000Dx-96 for geh-help-gnu-emacs@m.gmane.org; Sun, 12 Oct 2008 17:41:23 -0400 Original-Path: news.stanford.edu!headwall.stanford.edu!newshub.sdsu.edu!proxad.net!feeder1-2.proxad.net!cleanfeed3-a.proxad.net!nnrp13-2.free.fr!not-for-mail Original-Newsgroups: gnu.emacs.help Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.2 (gnu/linux) Cancel-Lock: sha1:iMws9XXBzxS9eyySjxtfO8O7c0Y= Original-Lines: 49 Original-NNTP-Posting-Date: 12 Oct 2008 22:48:44 MEST Original-NNTP-Posting-Host: 88.182.134.169 Original-X-Trace: 1223844524 news-3.free.fr 31049 88.182.134.169:52683 Original-X-Complaints-To: abuse@proxad.net Original-Xref: news.stanford.edu gnu.emacs.help:163369 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:58710 Archived-At: Andrei Alexandrescu writes: > Hello, > > > I'd like to change code visuals for the D programming language as > follows. I'd like the construct: > > Symbol!(balanced_parens) > > to be visualized as: > > Symbol«balanced_parens» > > The chevrons should appear electrically when I type the closing > ")". Note that balanced_parens could in turn nested use of "!()", as > in A!(B!(C)), and they should all be paired using chevrons. The > underlying file should not contain the chevrons, just the ASCII > representation using "!(" and ")". > > I haven't done much elisp programming beyond the common .emacs > configuration tricks, so I don't know where to start. A few searches > suggested that overlays may be what I'm looking for... any ideas and > pointers? Thank you. If you didn't ask for recursion, this could have be done with font-locking. (font-lock-add-keywords nil '(("\\(!(\\)[^()]*\\()\\)" 0 (progn (compose-region (match-beginning 1) (match-end 1) ?« 'decompose-region) (compose-region (match-beginning 2) (match-end 2) ?» 'decompose-region) nil)))) But since this uses regular expressions, it won't work for recursive !(...). You can still use compose-region, but you'll have to implement the parsing yourself. Perhaps this could be hooked on the code doing the parenthesis balancing? -- __Pascal Bourguignon__ http://www.informatimago.com/ You never feed me. Perhaps I'll sleep on your face. That will sure show you.