X-Git-Url: http://cgit.sxemacs.org/?p=gnus;a=blobdiff_plain;f=lisp%2Fgnus-cache.el;h=72c88600a5e9e4a2364dab40c0ae200521b2172d;hp=fcb8bb52a2e754146251cf028ed99f2dfec032a6;hb=17f456f97c1659bcdc5935b91a011cdad96b9150;hpb=0f6d7f28d160274833daba734c09b783b685c6fe diff --git a/lisp/gnus-cache.el b/lisp/gnus-cache.el index fcb8bb52a..72c88600a 100644 --- a/lisp/gnus-cache.el +++ b/lisp/gnus-cache.el @@ -1,5 +1,7 @@ ;;; gnus-cache.el --- cache interface for Gnus -;; Copyright (C) 1995,96,97,98,99 Free Software Foundation, Inc. + +;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, +;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. ;; Author: Lars Magne Ingebrigtsen ;; Keywords: news @@ -8,7 +10,7 @@ ;; 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) +;; the Free Software Foundation; either version 3, or (at your option) ;; any later version. ;; GNU Emacs is distributed in the hope that it will be useful, @@ -18,24 +20,28 @@ ;; 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. +;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +;; Boston, MA 02110-1301, USA. ;;; Commentary: ;;; Code: +;; For Emacs < 22.2. +(eval-and-compile + (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))) + (eval-when-compile (require 'cl)) (require 'gnus) -(require 'gnus-int) -(require 'gnus-range) -(require 'gnus-start) +(require 'gnus-sum) + (eval-when-compile - (require 'gnus-sum)) + (unless (fboundp 'gnus-agent-load-alist) + (defun gnus-agent-load-alist (group)))) (defcustom gnus-cache-active-file - (concat (file-name-as-directory gnus-cache-directory) "active") + (expand-file-name "active" gnus-cache-directory) "*The cache active file." :group 'gnus-cache :type 'file) @@ -60,7 +66,7 @@ If a group matches both gnus-cacheable-groups and gnus-uncacheable-groups it's not cached." :group 'gnus-cache :type '(choice (const :tag "off" nil) - regexp)) + regexp)) (defcustom gnus-uncacheable-groups nil "*Groups that match this regexp will not be cached. @@ -88,9 +94,12 @@ it's not cached." (defvar gnus-cache-buffer nil) (defvar gnus-cache-active-hashtb nil) (defvar gnus-cache-active-altered nil) +(defvar gnus-cache-total-fetched-hashtb nil) + +(declare-function nnvirtual-find-group-art "nnvirtual" (group article)) (eval-and-compile - (autoload 'nnml-generate-nov-databases-1 "nnml") + (autoload 'nnml-generate-nov-databases-directory "nnml") (autoload 'nnvirtual-find-group-art "nnvirtual")) @@ -122,24 +131,27 @@ it's not cached." (overview-file (gnus-cache-file-name (car gnus-cache-buffer) ".overview"))) ;; write the overview only if it was modified - (when (buffer-modified-p buffer) - (save-excursion - (set-buffer buffer) + (when (and (buffer-live-p buffer) (buffer-modified-p buffer)) + (with-current-buffer buffer (if (> (buffer-size) 0) ;; Non-empty overview, write it to a file. (let ((coding-system-for-write gnus-cache-overview-coding-system)) (gnus-write-buffer overview-file)) - ;; Empty overview file, remove it - (when (file-exists-p overview-file) - (delete-file overview-file)) - ;; If possible, remove group's cache subdirectory. - (condition-case nil - ;; FIXME: we can detect the error type and warn the user - ;; of any inconsistencies (articles w/o nov entries?). - ;; for now, just be conservative...delete only if safe -- sj - (delete-directory (file-name-directory overview-file)) - (error nil))))) + (let ((file-name-coding-system nnmail-pathname-coding-system)) + ;; Empty overview file, remove it + (when (file-exists-p overview-file) + (delete-file overview-file)) + ;; If possible, remove group's cache subdirectory. + (condition-case nil + ;; FIXME: we can detect the error type and warn the user + ;; of any inconsistencies (articles w/o nov entries?). + ;; for now, just be conservative...delete only if safe -- sj + (delete-directory (file-name-directory overview-file)) + (error)))) + + (gnus-cache-update-overview-total-fetched-for + (car gnus-cache-buffer) overview-file))) ;; Kill the buffer -- it's either unmodified or saved. (gnus-kill-buffer buffer) (setq gnus-cache-buffer nil)))) @@ -149,7 +161,9 @@ it's not cached." (when (and (or force (not (eq gnus-use-cache 'passive))) (numberp article) (> article 0)) ; This might be a dummy article. - (let ((number article) file headers) + (let ((number article) + file headers lines-chars + (file-name-coding-system nnmail-pathname-coding-system)) ;; If this is a virtual group, we find the real group. (when (gnus-virtual-group-p group) (let ((result (nnvirtual-find-group-art @@ -159,11 +173,7 @@ it's not cached." (when (and number (> number 0) ; Reffed article. (or force - (and (or (not gnus-cacheable-groups) - (string-match gnus-cacheable-groups group)) - (or (not gnus-uncacheable-groups) - (not (string-match - gnus-uncacheable-groups group))) + (and (gnus-cache-fully-p group) (gnus-cache-member-of-class gnus-cache-enter-articles ticked dormant unread))) (not (file-exists-p (setq file (gnus-cache-file-name @@ -175,13 +185,20 @@ it's not cached." t ; The article already is saved. (save-excursion (set-buffer nntp-server-buffer) + (require 'gnus-art) (let ((gnus-use-cache nil) (gnus-article-decode-hook nil)) (gnus-request-article-this-buffer number group)) (when (> (buffer-size) 0) - (gnus-write-buffer file) - (setq headers (nnheader-parse-head t)) + (let ((coding-system-for-write gnus-cache-coding-system)) + (gnus-write-buffer file) + (gnus-cache-update-file-total-fetched-for group file)) + (setq lines-chars (nnheader-get-lines-and-char)) + (nnheader-remove-body) + (setq headers (nnheader-parse-naked-head)) (mail-header-set-number headers number) + (mail-header-set-lines headers (car lines-chars)) + (mail-header-set-chars headers (cadr lines-chars)) (gnus-cache-change-buffer group) (set-buffer (cdr gnus-cache-buffer)) (goto-char (point-max)) @@ -206,8 +223,9 @@ it's not cached." (nnheader-insert-nov headers) ;; Update the active info. (set-buffer gnus-summary-buffer) - (gnus-cache-update-active group number) - (push article gnus-newsgroup-cached) + (gnus-cache-possibly-update-active group (cons number number)) + (setq gnus-newsgroup-cached + (gnus-add-to-sorted-list gnus-newsgroup-cached article)) (gnus-summary-update-secondary-mark article)) t)))))) @@ -232,13 +250,11 @@ it's not cached." (defun gnus-cache-possibly-remove-articles-1 () "Possibly remove some of the removable articles." - (unless (eq gnus-use-cache 'passive) - (let ((articles gnus-cache-removable-articles) - (cache-articles gnus-newsgroup-cached) - article) + (when (gnus-cache-fully-p gnus-newsgroup-name) + (let ((cache-articles gnus-newsgroup-cached)) (gnus-cache-change-buffer gnus-newsgroup-name) - (while articles - (when (memq (setq article (pop articles)) cache-articles) + (dolist (article gnus-cache-removable-articles) + (when (memq article cache-articles) ;; The article was in the cache, so we see whether we are ;; supposed to remove it from the cache. (gnus-cache-possibly-remove-article @@ -253,7 +269,8 @@ it's not cached." (defun gnus-cache-request-article (article group) "Retrieve ARTICLE in GROUP from the cache." (let ((file (gnus-cache-file-name group article)) - (buffer-read-only nil)) + (buffer-read-only nil) + (file-name-coding-system nnmail-pathname-coding-system)) (when (file-exists-p file) (erase-buffer) (gnus-kill-all-overlays) @@ -280,11 +297,10 @@ it's not cached." ;; the normal way. (let ((gnus-use-cache nil)) (gnus-retrieve-headers articles group fetch-old)) - (let ((uncached-articles (gnus-sorted-intersection - (gnus-sorted-complement articles cached) - articles)) + (let ((uncached-articles (gnus-sorted-difference articles cached)) (cache-file (gnus-cache-file-name group ".overview")) - type) + type + (file-name-coding-system nnmail-pathname-coding-system)) ;; We first retrieve all the headers that we don't have in ;; the cache. (let ((gnus-use-cache nil)) @@ -304,7 +320,7 @@ it's not cached." ;; unsuccessful), so we use the cached headers exclusively. (set-buffer nntp-server-buffer) (erase-buffer) - (let ((coding-system-for-read + (let ((coding-system-for-read gnus-cache-overview-coding-system)) (insert-file-contents cache-file)) 'nov) @@ -324,34 +340,40 @@ it's not cached." If not given a prefix, use the process marked articles instead. Returns the list of articles entered." (interactive "P") - (let ((articles (gnus-summary-work-articles n)) - article out) - (while (setq article (pop articles)) + (let (out) + (dolist (article (gnus-summary-work-articles n)) (gnus-summary-remove-process-mark article) (if (natnump article) (when (gnus-cache-possibly-enter-article gnus-newsgroup-name article nil nil nil t) + (setq gnus-newsgroup-undownloaded (delq article gnus-newsgroup-undownloaded)) (push article out)) (gnus-message 2 "Can't cache article %d" article)) + (gnus-summary-update-download-mark article) (gnus-summary-update-secondary-mark article)) (gnus-summary-next-subject 1) (gnus-summary-position-point) (nreverse out))) -(defun gnus-cache-remove-article (n) +(defun gnus-cache-remove-article (&optional n) "Remove the next N articles from the cache. If not given a prefix, use the process marked articles instead. Returns the list of articles removed." (interactive "P") (gnus-cache-change-buffer gnus-newsgroup-name) - (let ((articles (gnus-summary-work-articles n)) - article out) - (while articles - (setq article (pop articles)) + (let (out) + (dolist (article (gnus-summary-work-articles n)) (gnus-summary-remove-process-mark article) (when (gnus-cache-possibly-remove-article article nil nil nil t) + (when gnus-newsgroup-agentized + (let ((alist (gnus-agent-load-alist gnus-newsgroup-name))) + (unless (cdr (assoc article alist)) + (setq gnus-newsgroup-undownloaded + (gnus-add-to-sorted-list + gnus-newsgroup-undownloaded article))))) (push article out)) + (gnus-summary-update-download-mark article) (gnus-summary-update-secondary-mark article)) (gnus-summary-next-subject 1) (gnus-summary-position-point) @@ -364,15 +386,20 @@ Returns the list of articles removed." (defun gnus-summary-insert-cached-articles () "Insert all the articles cached for this group into the current buffer." (interactive) - (let ((cached (sort (copy-sequence gnus-newsgroup-cached) '<)) - (gnus-verbose (max 6 gnus-verbose))) - (unless cached - (gnus-message 3 "No cached articles for this group")) - (while cached - (gnus-summary-goto-subject (pop cached) t)))) + (let ((gnus-verbose (max 6 gnus-verbose))) + (if (not gnus-newsgroup-cached) + (gnus-message 3 "No cached articles for this group") + (gnus-summary-goto-subjects gnus-newsgroup-cached)))) -(defalias 'gnus-summary-limit-include-cached - 'gnus-summary-insert-cached-articles) +(defun gnus-summary-limit-include-cached () + "Limit the summary buffer to articles that are cached." + (interactive) + (let ((gnus-verbose (max 6 gnus-verbose))) + (if gnus-newsgroup-cached + (progn + (gnus-summary-limit gnus-newsgroup-cached) + (gnus-summary-position-point)) + (gnus-message 3 "No cached articles for this group")))) ;;; Internal functions. @@ -392,7 +419,8 @@ Returns the list of articles removed." " *gnus-cache-overview*")))) ;; Insert the contents of this group's cache overview. (erase-buffer) - (let ((file (gnus-cache-file-name group ".overview"))) + (let ((file (gnus-cache-file-name group ".overview")) + (file-name-coding-system nnmail-pathname-coding-system)) (when (file-exists-p file) (nnheader-insert-file-contents file))) ;; We have a fresh (empty/just loaded) buffer, @@ -406,21 +434,60 @@ Returns the list of articles removed." (and unread (memq 'unread class)) (and (not unread) (not ticked) (not dormant) (memq 'read class)))) +(defvar gnus-cache-decoded-group-names nil + "Alist of original group names and decoded group names. +Decoding is done according to `gnus-group-name-charset-method-alist' +or `gnus-group-name-charset-group-alist'.") + +(defvar gnus-cache-unified-group-names nil + "Alist of unified decoded group names and original group names. +A group name is decoded according to +`gnus-group-name-charset-method-alist' or +`gnus-group-name-charset-group-alist' first, and is encoded and +decoded again according to `nnmail-pathname-coding-system', +`file-name-coding-system', or `default-file-name-coding-system'. + +It is used when asking for a original group name from a cache +directory name, in which non-ASCII characters might have been unified +into the ones of a certain charset particularly if the `utf-8' coding +system for example was used.") + +(defun gnus-cache-decoded-group-name (group) + "Return a decoded group name of GROUP." + (or (cdr (assoc group gnus-cache-decoded-group-names)) + (let ((decoded (gnus-group-decoded-name group)) + (coding (or nnmail-pathname-coding-system + (and (boundp 'file-name-coding-system) + file-name-coding-system) + (and (boundp 'default-file-name-coding-system) + default-file-name-coding-system)))) + (push (cons group decoded) gnus-cache-decoded-group-names) + (push (cons (mm-decode-coding-string + (mm-encode-coding-string decoded coding) + coding) + group) + gnus-cache-unified-group-names) + decoded))) + (defun gnus-cache-file-name (group article) - (concat (file-name-as-directory gnus-cache-directory) - (file-name-as-directory - (nnheader-translate-file-chars - (if (gnus-use-long-file-name 'not-cache) - group - (let ((group (nnheader-replace-duplicate-chars-in-string - (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)))) + (setq group (gnus-cache-decoded-group-name group)) + (expand-file-name + (if (stringp article) article (int-to-string article)) + (file-name-as-directory + (expand-file-name + (nnheader-translate-file-chars + (if (gnus-use-long-file-name 'not-cache) + group + (let ((group (nnheader-replace-duplicate-chars-in-string + (nnheader-replace-chars-in-string group ?/ ?_) + ?. ?_))) + ;; Translate the first colon into a slash. + (when (string-match ":" group) + (setq group (concat (substring group 0 (match-beginning 0)) + "/" (substring group (match-end 0))))) + (nnheader-replace-chars-in-string group ?. ?/))) + t) + gnus-cache-directory)))) (defun gnus-cache-update-article (group article) "If ARTICLE is in the cache, remove it and re-enter it." @@ -436,7 +503,8 @@ Returns the list of articles removed." "Possibly remove ARTICLE from the cache." (let ((group gnus-newsgroup-name) (number article) - file) + file + (file-name-coding-system nnmail-pathname-coding-system)) ;; If this is a virtual group, we find the real group. (when (gnus-virtual-group-p group) (let ((result (nnvirtual-find-group-art @@ -449,32 +517,40 @@ Returns the list of articles removed." (gnus-cache-member-of-class gnus-cache-remove-articles ticked dormant unread))) (save-excursion + (gnus-cache-update-file-total-fetched-for group file t) (delete-file file) + (set-buffer (cdr gnus-cache-buffer)) (goto-char (point-min)) (when (or (looking-at (concat (int-to-string number) "\t")) (search-forward (concat "\n" (int-to-string number) "\t") (point-max) t)) - (delete-region (progn (beginning-of-line) (point)) - (progn (forward-line 1) (point))))) - (setq gnus-newsgroup-cached - (delq article gnus-newsgroup-cached)) + (gnus-delete-line))) + (unless (setq gnus-newsgroup-cached + (delq article gnus-newsgroup-cached)) + (gnus-sethash gnus-newsgroup-name nil gnus-cache-active-hashtb) + (setq gnus-cache-active-altered t)) (gnus-summary-update-secondary-mark article) t))) (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))) - articles) + articles + (file-name-coding-system nnmail-pathname-coding-system)) (when (file-exists-p dir) (setq articles - (sort (mapcar (lambda (name) (string-to-int name)) + (sort (mapcar (lambda (name) (string-to-number 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)))) + (if articles + (progn + (gnus-cache-update-active group (car articles) t) + (gnus-cache-update-active group (car (last articles)))) + (when (gnus-gethash group gnus-cache-active-hashtb) + (gnus-sethash group nil gnus-cache-active-hashtb) + (setq gnus-cache-active-altered t))) articles))) (defun gnus-cache-braid-nov (group cached &optional file) @@ -484,9 +560,9 @@ Returns the list of articles removed." (save-excursion (set-buffer cache-buf) (erase-buffer) - (let ((coding-system-for-read - gnus-cache-overview-coding-system)) - (insert-file-contents + (let ((coding-system-for-read gnus-cache-overview-coding-system) + (file-name-coding-system nnmail-pathname-coding-system)) + (insert-file-contents (or file (gnus-cache-file-name group ".overview")))) (goto-char (point-min)) (insert "\n") @@ -498,13 +574,13 @@ Returns the list of articles removed." (< (read (current-buffer)) (car cached))) (forward-line 1)) (beginning-of-line) - (save-excursion - (set-buffer cache-buf) - (if (search-forward (concat "\n" (int-to-string (car cached)) "\t") - nil t) - (setq beg (progn (beginning-of-line) (point)) - end (progn (end-of-line) (point))) - (setq beg nil))) + (set-buffer cache-buf) + (if (search-forward (concat "\n" (int-to-string (car cached)) "\t") + nil t) + (setq beg (point-at-bol) + end (progn (end-of-line) (point))) + (setq beg nil)) + (set-buffer nntp-server-buffer) (when beg (insert-buffer-substring cache-buf beg end) (insert "\n")) @@ -513,35 +589,33 @@ Returns the list of articles removed." (defun gnus-cache-braid-heads (group cached) (let ((cache-buf (gnus-get-buffer-create " *gnus-cache*"))) - (save-excursion - (set-buffer cache-buf) + (with-current-buffer cache-buf (erase-buffer)) (set-buffer nntp-server-buffer) (goto-char (point-min)) - (while cached + (dolist (entry cached) (while (and (not (eobp)) (looking-at "2.. +\\([0-9]+\\) ") (< (progn (goto-char (match-beginning 1)) (read (current-buffer))) - (car cached))) + entry)) (search-forward "\n.\n" nil 'move)) (beginning-of-line) - (save-excursion - (set-buffer cache-buf) - (erase-buffer) - (let ((coding-system-for-read - gnus-cache-coding-system)) - (insert-file-contents (gnus-cache-file-name group (car cached)))) - (goto-char (point-min)) - (insert "220 ") - (princ (car cached) (current-buffer)) - (insert " Article retrieved.\n") - (search-forward "\n\n" nil 'move) - (delete-region (point) (point-max)) - (forward-char -1) - (insert ".")) - (insert-buffer-substring cache-buf) - (setq cached (cdr cached))) + (set-buffer cache-buf) + (erase-buffer) + (let ((coding-system-for-read gnus-cache-coding-system) + (file-name-coding-system nnmail-pathname-coding-system)) + (insert-file-contents (gnus-cache-file-name group entry))) + (goto-char (point-min)) + (insert "220 ") + (princ (car cached) (current-buffer)) + (insert " Article retrieved.\n") + (search-forward "\n\n" nil 'move) + (delete-region (point) (point-max)) + (forward-char -1) + (insert ".") + (set-buffer nntp-server-buffer) + (insert-buffer-substring cache-buf)) (kill-buffer cache-buf))) ;;;###autoload @@ -553,7 +627,7 @@ $ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache" (interactive) (let ((gnus-mark-article-hook nil) (gnus-expert-user t) - (nnmail-spool-file nil) + (mail-sources nil) (gnus-use-dribble-file nil) (gnus-novice-user nil) (gnus-large-newsgroup nil)) @@ -582,7 +656,7 @@ $ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache" ;; We simply read the active file. (save-excursion (gnus-set-work-buffer) - (insert-file-contents gnus-cache-active-file) + (nnheader-insert-file-contents gnus-cache-active-file) (gnus-active-to-gnus-format nil (setq gnus-cache-active-hashtb (gnus-make-hashtable @@ -598,6 +672,24 @@ $ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache" ;; Mark the active hashtb as unaltered. (setq gnus-cache-active-altered nil))) +(defun gnus-cache-possibly-update-active (group active) + "Update active info bounds of GROUP with ACTIVE if necessary. +The update is performed if ACTIVE contains a higher or lower bound +than the current." + (let ((lower t) (higher t)) + (if gnus-cache-active-hashtb + (let ((cache-active (gnus-gethash group gnus-cache-active-hashtb))) + (when cache-active + (unless (< (car active) (car cache-active)) + (setq lower nil)) + (unless (> (cdr active) (cdr cache-active)) + (setq higher nil)))) + (gnus-cache-read-active)) + (when lower + (gnus-cache-update-active group (car active) t)) + (when higher + (gnus-cache-update-active group (cdr active))))) + (defun gnus-cache-update-active (group number &optional low) "Update the upper bound of the active info of GROUP to NUMBER. If LOW, update the lower bound instead." @@ -618,6 +710,7 @@ If LOW, update the lower bound instead." (interactive) (let* ((top (null directory)) (directory (expand-file-name (or directory gnus-cache-directory))) + (file-name-coding-system nnmail-pathname-coding-system) (files (directory-files directory 'full)) (group (if top @@ -635,24 +728,29 @@ If LOW, update the lower bound instead." (gnus-message 5 "Generating the cache active file...") (setq gnus-cache-active-hashtb (gnus-make-hashtable 123))) (when (string-match "^\\(nn[^_]+\\)_" group) - (setq group (replace-match "\\1:" t t group))) + (setq group (replace-match "\\1:" t nil group))) ;; Separate articles from all other files and directories. (while files (if (string-match "^[0-9]+$" (file-name-nondirectory (car files))) - (push (string-to-int (file-name-nondirectory (pop files))) nums) + (push (string-to-number (file-name-nondirectory (pop files))) nums) (push (pop files) alphs))) ;; If we have nums, then this is probably a valid group. (when (setq nums (sort nums '<)) - (gnus-sethash group (cons (car nums) (gnus-last-element nums)) + ;; Use non-decoded group name. + ;; FIXME: this is kind of a workaround. The active file should + ;; be updated at the time articles are cached. It will make + ;; `gnus-cache-unified-group-names' needless. + (gnus-sethash (or (cdr (assoc group gnus-cache-unified-group-names)) + group) + (cons (car nums) (gnus-last-element nums)) gnus-cache-active-hashtb)) ;; Go through all the other files. - (while alphs - (when (and (file-directory-p (car alphs)) + (dolist (file alphs) + (when (and (file-directory-p file) (not (string-match "^\\." - (file-name-nondirectory (car alphs))))) + (file-name-nondirectory file)))) ;; We descend directories. - (gnus-cache-generate-active (car alphs))) - (setq alphs (cdr alphs))) + (gnus-cache-generate-active file))) ;; Write the new active file. (when top (gnus-cache-write-active t) @@ -664,13 +762,163 @@ If LOW, update the lower bound instead." (interactive (list gnus-cache-directory)) (gnus-cache-close) (let ((nnml-generate-active-function 'identity)) - (nnml-generate-nov-databases-1 dir))) + (nnml-generate-nov-databases-directory dir)) + + (setq gnus-cache-total-fetched-hashtb nil) + + (gnus-cache-open)) (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)) +(defun gnus-cache-fully-p (&optional group) + "Returns non-nil if the cache should be fully used. +If GROUP is non-nil, also cater to `gnus-cacheable-groups' and +`gnus-uncacheable-groups'." + (and gnus-use-cache + (not (eq gnus-use-cache 'passive)) + (if (null group) + t + (and (or (not gnus-cacheable-groups) + (string-match gnus-cacheable-groups group)) + (or (not gnus-uncacheable-groups) + (not (string-match gnus-uncacheable-groups group))))))) + +;;;###autoload +(defun gnus-cache-rename-group (old-group new-group) + "Rename OLD-GROUP as NEW-GROUP. +Always updates the cache, even when disabled, as the old cache +files would corrupt Gnus when the cache was next enabled. It +depends on the caller to determine whether group renaming is +supported." + (let ((old-dir (gnus-cache-file-name old-group "")) + (new-dir (gnus-cache-file-name new-group "")) + (file-name-coding-system nnmail-pathname-coding-system)) + (gnus-rename-file old-dir new-dir t)) + + (gnus-cache-rename-group-total-fetched-for old-group new-group) + + (let ((no-save gnus-cache-active-hashtb)) + (unless gnus-cache-active-hashtb + (gnus-cache-read-active)) + (let* ((old-group-hash-value + (gnus-gethash old-group gnus-cache-active-hashtb)) + (new-group-hash-value + (gnus-gethash new-group gnus-cache-active-hashtb)) + (delta + (or old-group-hash-value new-group-hash-value))) + (gnus-sethash new-group old-group-hash-value gnus-cache-active-hashtb) + (gnus-sethash old-group nil gnus-cache-active-hashtb) + + (if no-save + (setq gnus-cache-active-altered delta) + (gnus-cache-write-active delta))))) + +;;;###autoload +(defun gnus-cache-delete-group (group) + "Delete GROUP from the cache. +Always updates the cache, even when disabled, as the old cache +files would corrupt gnus when the cache was next enabled. +Depends upon the caller to determine whether group deletion is +supported." + (let ((dir (gnus-cache-file-name group "")) + (file-name-coding-system nnmail-pathname-coding-system)) + (gnus-delete-directory dir)) + + (gnus-cache-delete-group-total-fetched-for group) + + (let ((no-save gnus-cache-active-hashtb)) + (unless gnus-cache-active-hashtb + (gnus-cache-read-active)) + (let* ((group-hash-value (gnus-gethash group gnus-cache-active-hashtb))) + (gnus-sethash group nil gnus-cache-active-hashtb) + + (if no-save + (setq gnus-cache-active-altered group-hash-value) + (gnus-cache-write-active group-hash-value))))) + +(defvar gnus-cache-inhibit-update-total-fetched-for nil) +(defvar gnus-cache-need-update-total-fetched-for nil) + +(defmacro gnus-cache-with-refreshed-group (group &rest body) + `(prog1 (let ((gnus-cache-inhibit-update-total-fetched-for t)) + ,@body) + (when (and gnus-cache-need-update-total-fetched-for + (not gnus-cache-inhibit-update-total-fetched-for)) + (save-excursion + (set-buffer gnus-group-buffer) + (setq gnus-cache-need-update-total-fetched-for nil) + (gnus-group-update-group ,group t))))) + +(defun gnus-cache-update-file-total-fetched-for (group file &optional subtract) + (when gnus-cache-total-fetched-hashtb + (gnus-cache-with-refreshed-group + group + (let* ((entry (or (gnus-gethash group gnus-cache-total-fetched-hashtb) + (gnus-sethash group (make-vector 2 0) + gnus-cache-total-fetched-hashtb))) + size) + + (if file + (setq size (or (nth 7 (file-attributes file)) 0)) + (let* ((file-name-coding-system nnmail-pathname-coding-system) + (files (directory-files (gnus-cache-file-name group "") + t nil t)) + file attrs) + (setq size 0.0) + (while (setq file (pop files)) + (setq attrs (file-attributes file)) + (unless (nth 0 attrs) + (incf size (float (nth 7 attrs))))))) + + (setq gnus-cache-need-update-total-fetched-for t) + + (incf (nth 1 entry) (if subtract (- size) size)))))) + +(defun gnus-cache-update-overview-total-fetched-for (group file) + (when gnus-cache-total-fetched-hashtb + (gnus-cache-with-refreshed-group + group + (let* ((entry (or (gnus-gethash group gnus-cache-total-fetched-hashtb) + (gnus-sethash group (make-list 2 0) + gnus-cache-total-fetched-hashtb))) + (file-name-coding-system nnmail-pathname-coding-system) + (size (or (nth 7 (file-attributes + (or file + (gnus-cache-file-name group ".overview")))) + 0))) + (setq gnus-cache-need-update-total-fetched-for t) + (setf (nth 0 entry) size))))) + +(defun gnus-cache-rename-group-total-fetched-for (old-group new-group) + "Record of disk space used by OLD-GROUP now associated with NEW-GROUP." + (when gnus-cache-total-fetched-hashtb + (let ((entry (gnus-gethash old-group gnus-cache-total-fetched-hashtb))) + (gnus-sethash new-group entry gnus-cache-total-fetched-hashtb) + (gnus-sethash old-group nil gnus-cache-total-fetched-hashtb)))) + +(defun gnus-cache-delete-group-total-fetched-for (group) + "Delete record of disk space used by GROUP being deleted." + (when gnus-cache-total-fetched-hashtb + (gnus-sethash group nil gnus-cache-total-fetched-hashtb))) + +(defun gnus-cache-total-fetched-for (group &optional no-inhibit) + "Get total disk space used by the cache for the specified GROUP." + (unless (equal group "dummy.group") + (unless gnus-cache-total-fetched-hashtb + (setq gnus-cache-total-fetched-hashtb (gnus-make-hashtable 1024))) + + (let* ((entry (gnus-gethash group gnus-cache-total-fetched-hashtb))) + (if entry + (apply '+ entry) + (let ((gnus-cache-inhibit-update-total-fetched-for (not no-inhibit))) + (+ + (gnus-cache-update-overview-total-fetched-for group nil) + (gnus-cache-update-file-total-fetched-for group nil))))))) + (provide 'gnus-cache) +;;; arch-tag: 05a79442-8c58-4e65-bd0a-3cbb1b89a33a ;;; gnus-cache.el ends here