;;; gnus-cache.el --- cache interface for Gnus
-;; Copyright (C) 1995,96 Free Software Foundation, Inc.
+;; Copyright (C) 1995,96,97,98 Free Software Foundation, Inc.
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
;;; Code:
+(eval-when-compile (require 'cl))
+
(require 'gnus)
(require 'gnus-int)
(require 'gnus-range)
-(require 'gnus-sum)
(require 'gnus-start)
+(eval-when-compile
+ (require 'gnus-sum))
-(defgroup gnus-cache nil
- "Cache interface."
- :group 'gnus)
-
-(defcustom gnus-cache-directory
- (nnheader-concat gnus-directory "cache/")
- "*The directory where cached articles will be stored."
- :group 'gnus-cache
- :type 'directory)
-
-(defcustom gnus-cache-active-file
+(defcustom gnus-cache-active-file
(concat (file-name-as-directory gnus-cache-directory) "active")
"*The cache active file."
:group 'gnus-cache
(not (eq gnus-use-cache 'passive))))
(gnus-cache-read-active)))
-(condition-case ()
- (gnus-add-shutdown 'gnus-cache-close 'gnus)
- ;; Complexities of byte-compiling makes this kludge necessary. Eeek.
- (error nil))
+;; Complexities of byte-compiling make this kludge necessary. Eeek.
+(ignore-errors
+ (gnus-add-shutdown 'gnus-cache-close 'gnus))
(defun gnus-cache-close ()
"Shut down the cache."
(gnus-kill-buffer buffer)
(setq gnus-cache-buffer nil))))
-(defun gnus-cache-possibly-enter-article
+(defun gnus-cache-possibly-enter-article
(group article headers ticked dormant unread &optional force)
(when (and (or force (not (eq gnus-use-cache 'passive)))
(numberp article)
(> article 0)
- (vectorp headers))
- ; This might be a dummy article.
+ (vectorp headers)) ; This might be a dummy article.
;; If this is a virtual group, we find the real group.
(when (gnus-virtual-group-p group)
- (let ((result (nnvirtual-find-group-art
+ (let ((result (nnvirtual-find-group-art
(gnus-group-real-name group) article)))
(setq group (car result)
headers (copy-sequence headers))
(mail-header-set-number headers (cdr result))))
(let ((number (mail-header-number headers))
file dir)
- (when (and (> number 0) ; Reffed article.
+ (when (and number
+ (> number 0) ; Reffed article.
(or force
(and (or (not gnus-uncacheable-groups)
(not (string-match
"Alter the ACTIVE info for GROUP to reflect the articles in the cache."
(when gnus-cache-active-hashtb
(let ((cache-active (gnus-gethash group gnus-cache-active-hashtb)))
- (and cache-active
- (< (car cache-active) (car active))
- (setcar active (car cache-active)))
- (and cache-active
- (> (cdr cache-active) (cdr active))
- (setcdr active (cdr cache-active))))))
+ (when cache-active
+ (when (< (car cache-active) (car active))
+ (setcar active (car cache-active)))
+ (when (> (cdr cache-active) (cdr active))
+ (setcdr active (cdr cache-active)))))))
(defun gnus-cache-retrieve-headers (articles group &optional fetch-old)
"Retrieve the headers for ARTICLES in GROUP."
- (let ((cached
+ (let ((cached
(setq gnus-newsgroup-cached (gnus-cache-articles-in-group group))))
(if (not cached)
;; No cached articles here, so we just retrieve them
articles))
(cache-file (gnus-cache-file-name group ".overview"))
type)
- ;; We first retrieve all the headers that we don't have in
+ ;; We first retrieve all the headers that we don't have in
;; the cache.
(let ((gnus-use-cache nil))
(when uncached-articles
- (setq type (and articles
- (gnus-retrieve-headers
+ (setq type (and articles
+ (gnus-retrieve-headers
uncached-articles group fetch-old)))))
(gnus-cache-save-buffers)
;; Then we insert the cached headers.
;; There are no cached headers.
type)
((null type)
- ;; There were no uncached headers (or retrieval was
+ ;; There were no uncached headers (or retrieval was
;; unsuccessful), so we use the cached headers exclusively.
(set-buffer nntp-server-buffer)
(erase-buffer)
If not given a prefix, use the process marked articles instead.
Returns the list of articles entered."
(interactive "P")
- (gnus-set-global-variables)
(let ((articles (gnus-summary-work-articles n))
article out)
- (while articles
- (setq article (pop articles))
- (when (gnus-cache-possibly-enter-article
- gnus-newsgroup-name article (gnus-summary-article-header article)
- nil nil nil t)
- (push article out))
+ (while (setq article (pop articles))
(gnus-summary-remove-process-mark article)
+ (if (natnump article)
+ (when (gnus-cache-possibly-enter-article
+ gnus-newsgroup-name article
+ (gnus-summary-article-header article)
+ nil nil nil t)
+ (push article out))
+ (gnus-message 2 "Can't cache article %d" article))
(gnus-summary-update-secondary-mark article))
(gnus-summary-next-subject 1)
(gnus-summary-position-point)
If not given a prefix, use the process marked articles instead.
Returns the list of articles removed."
(interactive "P")
- (gnus-set-global-variables)
(gnus-cache-change-buffer gnus-newsgroup-name)
(let ((articles (gnus-summary-work-articles n))
article out)
(while articles
(setq article (pop articles))
+ (gnus-summary-remove-process-mark article)
(when (gnus-cache-possibly-remove-article article nil nil nil t)
(push article out))
- (gnus-summary-remove-process-mark article)
(gnus-summary-update-secondary-mark article))
(gnus-summary-next-subject 1)
(gnus-summary-position-point)
(defun gnus-summary-insert-cached-articles ()
"Insert all the articles cached for this group into the current buffer."
(interactive)
- (let ((cached gnus-newsgroup-cached))
+ (let ((cached (sort (copy-sequence gnus-newsgroup-cached) '<))
+ (gnus-verbose (max 6 gnus-verbose)))
(unless cached
- (error "No cached articles for this group"))
+ (gnus-message 3 "No cached articles for this group"))
(while cached
(gnus-summary-goto-subject (pop cached) t))))
+(defalias 'gnus-summary-limit-include-cached
+ 'gnus-summary-insert-cached-articles)
+
;;; Internal functions.
(defun gnus-cache-change-buffer (group)
(erase-buffer)
(let ((file (gnus-cache-file-name group ".overview")))
(when (file-exists-p file)
- (insert-file-contents file)))
- ;; We have a fresh (empty/just loaded) buffer,
+ (nnheader-insert-file-contents file)))
+ ;; We have a fresh (empty/just loaded) buffer,
;; mark it as unmodified to save a redundant write later.
(set-buffer-modified-p nil))))
(defun gnus-cache-file-name (group article)
(concat (file-name-as-directory gnus-cache-directory)
(file-name-as-directory
- (if (gnus-use-long-file-name 'not-cache)
- group
- (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
- ;; Translate the first colon into a slash.
- (when (string-match ":" group)
- (aset group (match-beginning 0) ?/))
- (nnheader-replace-chars-in-string group ?. ?/))))
+ (nnheader-translate-file-chars
+ (if (gnus-use-long-file-name 'not-cache)
+ group
+ (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
+ ;; Translate the first colon into a slash.
+ (when (string-match ":" group)
+ (aset group (match-beginning 0) ?/))
+ (nnheader-replace-chars-in-string group ?. ?/)))
+ t))
(if (stringp article) article (int-to-string article))))
(defun gnus-cache-update-article (group article)
"If ARTICLE is in the cache, remove it and re-enter it."
- (when (gnus-cache-possibly-remove-article article nil nil nil t)
+ (gnus-cache-change-buffer group)
+ (when (gnus-cache-possibly-remove-article article nil nil nil t)
(let ((gnus-use-cache nil))
- (gnus-cache-possibly-enter-article
+ (gnus-cache-possibly-enter-article
gnus-newsgroup-name article (gnus-summary-article-header article)
nil nil nil t))))
-(defun gnus-cache-possibly-remove-article (article ticked dormant unread
+(defun gnus-cache-possibly-remove-article (article ticked dormant unread
&optional force)
"Possibly remove ARTICLE from the cache."
(let ((group gnus-newsgroup-name)
file)
;; If this is a virtual group, we find the real group.
(when (gnus-virtual-group-p group)
- (let ((result (nnvirtual-find-group-art
+ (let ((result (nnvirtual-find-group-art
(gnus-group-real-name group) article)))
(setq group (car result)
number (cdr result))))
(defun gnus-cache-articles-in-group (group)
"Return a sorted list of cached articles in GROUP."
- (let ((dir (file-name-directory (gnus-cache-file-name group 1))))
+ (let ((dir (file-name-directory (gnus-cache-file-name group 1)))
+ articles)
(when (file-exists-p dir)
- (sort (mapcar (lambda (name) (string-to-int name))
- (directory-files dir nil "^[0-9]+$" t))
- '<))))
-
-(defun gnus-cache-braid-nov (group cached)
+ (setq articles
+ (sort (mapcar (lambda (name) (string-to-int name))
+ (directory-files dir nil "^[0-9]+$" t))
+ '<))
+ ;; Update the cache active file, just to synch more.
+ (when articles
+ (gnus-cache-update-active group (car articles) t)
+ (gnus-cache-update-active group (car (last articles))))
+ articles)))
+
+(defun gnus-cache-braid-nov (group cached &optional file)
(let ((cache-buf (get-buffer-create " *gnus-cache*"))
beg end)
(gnus-cache-save-buffers)
(set-buffer cache-buf)
(buffer-disable-undo (current-buffer))
(erase-buffer)
- (insert-file-contents (gnus-cache-file-name group ".overview"))
+ (insert-file-contents (or file (gnus-cache-file-name group ".overview")))
(goto-char (point-min))
(insert "\n")
(goto-char (point-min)))
(gnus)
;; Go through all groups...
(gnus-group-mark-buffer)
- (gnus-group-universal-argument
- nil nil
- (lambda ()
- (gnus-summary-read-group (gnus-group-group-name) nil t)
- ;; ... and enter the articles into the cache.
- (when (eq major-mode 'gnus-summary-mode)
- (gnus-uu-mark-buffer)
- (gnus-cache-enter-article)
- (kill-buffer (current-buffer)))))))
+ (gnus-group-iterate nil
+ (lambda (group)
+ (let (gnus-auto-select-next)
+ (gnus-summary-read-group group nil t)
+ ;; ... and enter the articles into the cache.
+ (when (eq major-mode 'gnus-summary-mode)
+ (gnus-uu-mark-buffer)
+ (gnus-cache-enter-article)
+ (kill-buffer (current-buffer))))))))
(defun gnus-cache-read-active (&optional force)
"Read the cache active file."
(gnus-make-directory gnus-cache-directory)
- (if (not (and (file-exists-p gnus-cache-active-file)
- (or force (not gnus-cache-active-hashtb))))
+ (if (or (not (file-exists-p gnus-cache-active-file))
+ (not (zerop (nth 7 (file-attributes gnus-cache-active-file))))
+ force)
;; There is no active file, so we generate one.
(gnus-cache-generate-active)
;; We simply read the active file.
(gnus-set-work-buffer)
(insert-file-contents gnus-cache-active-file)
(gnus-active-to-gnus-format
- nil (setq gnus-cache-active-hashtb
- (gnus-make-hashtable
+ nil (setq gnus-cache-active-hashtb
+ (gnus-make-hashtable
(count-lines (point-min) (point-max)))))
(setq gnus-cache-active-altered nil))))
-
+
(defun gnus-cache-write-active (&optional force)
"Write the active hashtb to the active file."
(when (or force
;; Update the lower or upper bound.
(if low
(setcar active number)
- (setcdr active number))
- ;; Mark the active hashtb as altered.
- (setq gnus-cache-active-altered t))))
+ (setcdr active number)))
+ ;; Mark the active hashtb as altered.
+ (setq gnus-cache-active-altered t)))
;;;###autoload
(defun gnus-cache-generate-active (&optional directory)
(let* ((top (null directory))
(directory (expand-file-name (or directory gnus-cache-directory)))
(files (directory-files directory 'full))
- (group
+ (group
(if top
""
- (string-match
- (concat "^" (file-name-as-directory
- (expand-file-name gnus-cache-directory)))
+ (string-match
+ (concat "^" (regexp-quote
+ (file-name-as-directory
+ (expand-file-name gnus-cache-directory))))
(directory-file-name directory))
- (nnheader-replace-chars-in-string
+ (nnheader-replace-chars-in-string
(substring (directory-file-name directory) (match-end 0))
?/ ?.)))
nums alphs)
(let ((nnml-generate-active-function 'identity))
(nnml-generate-nov-databases-1 dir)))
+(defun gnus-cache-move-cache (dir)
+ "Move the cache tree to somewhere else."
+ (interactive "FMove the cache tree to: ")
+ (rename-file gnus-cache-directory dir))
+
(provide 'gnus-cache)
-
+
;;; gnus-cache.el ends here
projects / gnus / blobdiff