;;; gnus-async.el --- asynchronous support for Gnus
-;; Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+
+;; Copyright (C) 1996-2015 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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 2, or (at your option)
-;; any later version.
+;; 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
+;; 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; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
"Support for asynchronous operations."
:group 'gnus)
-(defcustom gnus-asynchronous nil
- "*If nil, inhibit all Gnus asynchronicity.
-If non-nil, let the other asynch variables be heeded."
- :group 'gnus-asynchronous
- :type 'boolean)
-
(defcustom gnus-use-article-prefetch 30
"*If non-nil, prefetch articles in groups that allow this.
If a number, prefetch only that many articles forward;
(const :tag "all" t)
(integer :tag "some" 0)))
+(defcustom gnus-asynchronous nil
+ "*If nil, inhibit all Gnus asynchronicity.
+If non-nil, let the other asynch variables be heeded."
+ :group 'gnus-asynchronous
+ :type 'boolean)
+
(defcustom gnus-prefetched-article-deletion-strategy '(read exit)
"List of symbols that say when to remove articles from the prefetch buffer.
Possible values in this list are `read', which means that
:group 'gnus-asynchronous
:type 'function)
+(defcustom gnus-async-post-fetch-function nil
+ "Function called after an article has been prefetched.
+The function will be called narrowed to the region of the article
+that was fetched."
+ :version "24.1"
+ :group 'gnus-asynchronous
+ :type '(choice (const nil) function))
+
;;; Internal variables.
(defvar gnus-async-prefetch-article-buffer " *Async Prefetch Article*")
(when (and (gnus-buffer-live-p summary)
gnus-asynchronous
(gnus-group-asynchronous-p group))
- (save-excursion
- (set-buffer gnus-summary-buffer)
+ (with-current-buffer gnus-summary-buffer
(let ((next (caadr (gnus-data-find-list article))))
(when next
(if (not (fboundp 'run-with-idle-timer))
(when (and do-fetch article)
;; We want to fetch some more articles.
- (save-excursion
- (set-buffer summary)
+ (with-current-buffer summary
(let (mark)
(gnus-async-set-buffer)
(goto-char (point-max))
(setq gnus-async-current-prefetch-article nil)
(when arg
(gnus-async-set-buffer)
+ (save-excursion
+ (save-restriction
+ (narrow-to-region mark (point-max))
+ ;; Put the articles into the agent, if they aren't already.
+ (when (and gnus-agent
+ (gnus-agent-group-covered-p group))
+ (save-restriction
+ (narrow-to-region mark (point-max))
+ (gnus-agent-store-article article group)))
+ ;; Prefetch images for the groups that want that.
+ (when (fboundp 'gnus-html-prefetch-images)
+ (gnus-html-prefetch-images summary))
+ (when gnus-async-post-fetch-function
+ (funcall gnus-async-post-fetch-function summary))))
(gnus-async-with-semaphore
(setq
gnus-async-article-alist
(cons (list (intern (format "%s-%d" group article)
gnus-async-hashtb)
- mark (set-marker (make-marker) (point-max))
+ mark (point-max-marker)
group article)
gnus-async-article-alist))))
(if (not (gnus-buffer-live-p summary))
(nntp-server-buffer (current-buffer))
(nntp-have-messaged nil)
(tries 0))
- (condition-case nil
- ;; FIXME: we could stop waiting after some
- ;; timeout, but this is the wrong place to do it.
- ;; rather than checking time-spent-waiting, we
- ;; should check time-since-last-output, which
- ;; needs to be done in nntp.el.
- (while (eq article gnus-async-current-prefetch-article)
- (incf tries)
- (when (nntp-accept-process-output proc)
- (setq tries 0))
- (when (and (not nntp-have-messaged)
- (= tries 3))
- (gnus-message 5 "Waiting for async article...")
- (setq nntp-have-messaged t)))
- (quit
- ;; if the user interrupted on a slow/hung connection,
- ;; do something friendly.
- (when (> tries 3)
- (setq gnus-async-current-prefetch-article nil))
- (signal 'quit nil)))
- (when nntp-have-messaged
- (gnus-message 5 "")))))
+ (when proc
+ (condition-case nil
+ ;; FIXME: we could stop waiting after some
+ ;; timeout, but this is the wrong place to do it.
+ ;; rather than checking time-spent-waiting, we
+ ;; should check time-since-last-output, which
+ ;; needs to be done in nntp.el.
+ (while (eq article gnus-async-current-prefetch-article)
+ (incf tries)
+ (when (nntp-accept-process-output proc)
+ (setq tries 0))
+ (when (and (not nntp-have-messaged)
+ (= tries 3))
+ (gnus-message 5 "Waiting for async article...")
+ (setq nntp-have-messaged t)))
+ (quit
+ ;; if the user interrupted on a slow/hung connection,
+ ;; do something friendly.
+ (when (> tries 3)
+ (setq gnus-async-current-prefetch-article nil))
+ (signal 'quit nil)))
+ (when nntp-have-messaged
+ (gnus-message 5 ""))))))
(defun gnus-async-delete-prefetched-entry (entry)
"Delete ENTRY from buffer and alist."
(set-marker (caddr entry) nil))
(gnus-async-with-semaphore
(setq gnus-async-article-alist
- (delq entry gnus-async-article-alist))))
+ (delq entry gnus-async-article-alist))
+ (unintern (car entry) gnus-async-hashtb)))
(defun gnus-async-prefetch-remove-group (group)
"Remove all articles belonging to GROUP from the prefetch buffer."
(when (and (gnus-group-asynchronous-p group)
(memq 'exit gnus-prefetched-article-deletion-strategy))
- (let ((alist gnus-async-article-alist))
- (save-excursion
- (gnus-async-set-buffer)
- (while alist
- (when (equal group (nth 3 (car alist)))
- (gnus-async-delete-prefetched-entry (car alist)))
- (pop alist))))))
+ (save-excursion
+ (gnus-async-set-buffer)
+ (dolist (entry gnus-async-article-alist)
+ (when (equal group (nth 3 entry))
+ (gnus-async-delete-prefetched-entry entry))))))
(defun gnus-async-prefetched-article-entry (group article)
- "Return the entry for ARTICLE in GROUP iff it has been prefetched."
+ "Return the entry for ARTICLE in GROUP if it has been prefetched."
(let ((entry (save-excursion
(gnus-async-set-buffer)
- (assq (intern (format "%s-%d" group article)
- gnus-async-hashtb)
+ (assq (intern-soft (format "%s-%d" group article)
+ gnus-async-hashtb)
gnus-async-article-alist))))
;; Perhaps something has emptied the buffer?
(if (and entry
projects / gnus / blobdiff