From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Juri Linkov Newsgroups: gmane.emacs.devel Subject: Re: A plea for sanity from a frustrated hacker. Date: Sun, 10 Jun 2007 01:45:43 +0300 Organization: JURTA Message-ID: <87k5uc3fxk.fsf@jurta.org> References: <20070609174130.GA3419@muc.de> <20070609202051.GA2399@muc.de> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1181429404 17068 80.91.229.12 (9 Jun 2007 22:50:04 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Sat, 9 Jun 2007 22:50:04 +0000 (UTC) Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Jun 10 00:50:03 2007 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1Hx9kw-0001w7-RZ for ged-emacs-devel@m.gmane.org; Sun, 10 Jun 2007 00:50:03 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Hx9kw-0003sR-F3 for ged-emacs-devel@m.gmane.org; Sat, 09 Jun 2007 18:50:02 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Hx9kL-0003PL-QS for emacs-devel@gnu.org; Sat, 09 Jun 2007 18:49:25 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Hx9kH-0003Oj-Q1 for emacs-devel@gnu.org; Sat, 09 Jun 2007 18:49:25 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Hx9kH-0003Og-JU for emacs-devel@gnu.org; Sat, 09 Jun 2007 18:49:21 -0400 Original-Received: from relay01.kiev.sovam.com ([62.64.120.200]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Hx9kH-0002Nw-3P for emacs-devel@gnu.org; Sat, 09 Jun 2007 18:49:21 -0400 Original-Received: from [83.170.232.243] (helo=smtp.svitonline.com) by relay01.kiev.sovam.com with esmtp (Exim 4.67) (envelope-from ) id 1Hx9kC-0005go-QF; Sun, 10 Jun 2007 01:49:17 +0300 In-Reply-To: <20070609202051.GA2399@muc.de> (Alan Mackenzie's message of "Sat\, 9 Jun 2007 21\:20\:51 +0100") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) X-Scanner-Signature: bf674e48040b805769da4ba4af5b826b X-DrWeb-checked: yes X-SpamTest-Envelope-From: juri@jurta.org X-SpamTest-Group-ID: 00000000 X-SpamTest-Header: Not Detected X-SpamTest-Info: Profiles 1133 [June 09 2007] X-SpamTest-Info: helo_type=3 X-SpamTest-Method: none X-SpamTest-Rate: 0 X-SpamTest-Status: Not detected X-SpamTest-Status-Extended: not_detected X-SpamTest-Version: SMTP-Filter Version 3.0.0 [0255], KAS30/Release X-detected-kernel: FreeBSD 4.8-5.1 (or MacOS X 10.2-10.3) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:72552 Archived-At: >> > Would somebody help me find this function, please? > >> [help-mode.el] > >> (define-button-type 'help-function-def >> :supertype 'help-xref >> 'help-function (lambda (fun file) >> (require 'find-func) >> (when (eq file 'C-source) >> (setq file >> (help-C-file-name (indirect-function fun) 'fun))) >> ;; Don't use find-function-noselect because it follows >> ;; aliases (which fails for built-in functions). >> (let ((location >> (find-function-search-for-symbol fun nil file))) >> (pop-to-buffer (car location)) >> (if (cdr location) >> (goto-char (cdr location)) >> (message "Unable to find location in file")))) >> 'help-echo (purecopy "mouse-2, RET: find function's definition")) > > Thanks! The problem is that you can't arrive to this definition by studying text properties in the *Help* buffer and debugging because `define-button-type' doesn't define a function or variable. BTW, I have another frustration with this function. I like to view the Help buffer and visit source code from it in the *same* window. The former is achieved by (add-hook 'same-window-regexps "\\*Help\\*\\(\\|<[0-9]+>\\)") But the latter is impossible since as can be seen in code above `help-function-def' calls the function `pop-to-buffer' which displays the source code buffer in a different window. -- Juri Linkov http://www.jurta.org/emacs/