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;;; org-gnus.el --- Support for links to Gnus groups and messages from within Org-mode
;; Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: Carsten Dominik <carsten at orgmode dot org>
;; Tassilo Horn <tassilo at member dot fsf dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: http://orgmode.org
;; Version: 6.15a
;;
;; This file is part of GNU Emacs.
;;
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;; This file implements links to Gnus groups and messages from within Org-mode.
;; Org-mode loads this module by default - if this is not what you want,
;; configure the variable `org-modules'.
;;; Code:
(require 'org)
(eval-when-compile
(require 'gnus-sum))
;; Customization variables
(when (fboundp 'defvaralias)
(defvaralias 'org-usenet-links-prefer-google 'org-gnus-prefer-web-links))
(defcustom org-gnus-prefer-web-links nil
"Non-nil means, `org-store-link' will create web links to Google groups.
When nil, Gnus will be used for such links.
Using a prefix arg to the command \\[org-store-link] (`org-store-link')
negates this setting for the duration of the command."
:group 'org-link-store
:type 'boolean)
;; Declare external functions and variables
(declare-function gnus-article-show-summary "gnus-art" ())
(declare-function gnus-summary-last-subject "gnus-sum" ())
(defvar gnus-other-frame-object)
(defvar gnus-group-name)
(defvar gnus-article-current)
;; Install the link type
(org-add-link-type "gnus" 'org-gnus-open)
(add-hook 'org-store-link-functions 'org-gnus-store-link)
;; Implementation
(defun org-gnus-group-link (group)
"Create a link to the Gnus group GROUP.
If GROUP is a newsgroup and `org-gnus-prefer-web-links' is
non-nil, create a link to groups.google.com or gmane.org.
Otherwise create a link to the group inside Gnus.
If `org-store-link' was called with a prefix arg the meaning of
`org-gnus-prefer-web-links' is reversed."
(let ((unprefixed-group (replace-regexp-in-string "^[^:]+:" "" group)))
(if (and (string-match "^nntp" group) ;; Only for nntp groups
(org-xor current-prefix-arg
org-gnus-prefer-web-links))
(org-make-link (if (string-match "gmane" unprefixed-group)
"http://news.gmane.org/"
"http://groups.google.com/group/")
unprefixed-group)
(org-make-link "gnus:" group))))
(defun org-gnus-article-link (group newsgroups message-id x-no-archive)
"Create a link to a Gnus article.
The article is specified by its MESSAGE-ID. Additional
parameters are the Gnus GROUP, the NEWSGROUPS the article was
posted to and the X-NO-ARCHIVE header value of that article.
If GROUP is a newsgroup and `org-gnus-prefer-web-links' is
non-nil, create a link to groups.google.com or gmane.org.
Otherwise create a link to the article inside Gnus.
If `org-store-link' was called with a prefix arg the meaning of
`org-gnus-prefer-web-links' is reversed."
(if (and (org-xor current-prefix-arg org-gnus-prefer-web-links)
newsgroups ;; Make web links only for nntp groups
(not x-no-archive)) ;; and if X-No-Archive isn't set.
(format (if (string-match "gmane\\." newsgroups)
"http://mid.gmane.org/%s"
"http://groups.google.com/groups/search?as_umsgid=%s")
(org-fixup-message-id-for-http message-id))
(org-make-link "gnus:" group "#" message-id)))
(defun org-gnus-store-link ()
"Store a link to a Gnus folder or message."
(cond
((eq major-mode 'gnus-group-mode)
(let* ((group (cond ((fboundp 'gnus-group-group-name) ; depending on Gnus
(gnus-group-group-name)) ; version
((fboundp 'gnus-group-name)
(gnus-group-name))
(t "???")))
desc link)
(unless group (error "Not on a group"))
(org-store-link-props :type "gnus" :group group)
(setq desc (org-gnus-group-link group)
link desc)
(org-add-link-props :link link :description desc)
link))
((memq major-mode '(gnus-summary-mode gnus-article-mode))
(and (eq major-mode 'gnus-summary-mode) (gnus-summary-show-article))
(let* ((group gnus-newsgroup-name)
(header (with-current-buffer gnus-article-buffer
(gnus-summary-toggle-header 1)
(goto-char (point-min))
(mail-header-extract-no-properties)))
(from (mail-header 'from header))
(message-id (org-remove-angle-brackets
(mail-header 'message-id header)))
(date (mail-header 'date header))
(to (mail-header 'to header))
(newsgroups (mail-header 'newsgroups header))
(x-no-archive (mail-header 'x-no-archive header))
(subject (gnus-summary-subject-string))
desc link)
(org-store-link-props :type "gnus" :from from :subject subject
:message-id message-id :group group :to to)
(setq desc (org-email-link-description)
link (org-gnus-article-link group newsgroups message-id x-no-archive))
(org-add-link-props :link link :description desc)
(gnus-summary-toggle-header -1)
link))))
(defun org-gnus-open (path)
"Follow the Gnus message or folder link specified by PATH."
(let (group article)
(if (not (string-match "\\`\\([^#]+\\)\\(#\\(.*\\)\\)?" path))
(error "Error in Gnus link"))
(setq group (match-string 1 path)
article (match-string 3 path))
(when group
(setq group (org-substring-no-properties group)))
(when article
(setq article (org-substring-no-properties article)))
(org-gnus-follow-link group article)))
(defun org-gnus-follow-link (&optional group article)
"Follow a Gnus link to GROUP and ARTICLE."
(require 'gnus)
(funcall (cdr (assq 'gnus org-link-frame-setup)))
(if gnus-other-frame-object (select-frame gnus-other-frame-object))
(when group
(setq group (org-substring-no-properties group)))
(when article
(setq article (org-substring-no-properties article)))
(cond ((and group article)
(gnus-activate-group group t)
(condition-case nil
(let ((articles 1)
group-opened)
(while (and (not group-opened)
;; stop on integer overflows
(> articles 0))
(setq group-opened (gnus-group-read-group articles nil group)
articles (if (< articles 16)
(1+ articles)
(* articles 2))))
(if group-opened
(gnus-summary-goto-article article nil t)
(message "Couldn't follow gnus link. %s"
"The summary couldn't be opened.")))
(quit (message "Couldn't follow gnus link. %s"
"The linked group is empty."))))
(group (gnus-group-jump-to-group group))))
(defun org-gnus-no-new-news ()
"Like `M-x gnus' but doesn't check for new news."
(if (not (gnus-alive-p)) (gnus)))
(provide 'org-gnus)
;; arch-tag: 512e0840-58fa-45b3-b456-71e10fa2376d
;;; org-gnus.el ends here
|
