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;;; mew-cache.el --- Cache management for Mew
;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Mar 23, 1997
;; Revised: Aug 26, 1997
;;; Code:
(defconst mew-cache-version "mew-cache.el version 0.05")
(require 'mew)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Prepare new message --- caching
;;
(defmacro mew-cache-decode-syntax (buf)
(` (save-excursion
(set-buffer (, buf))
mew-decode-syntax)))
(defmacro mew-cache-decode-error (buf)
(` (save-excursion
(set-buffer (, buf))
mew-decode-error)))
(defvar mew-cache nil
"Mail cache. (old ... new) order alist with association
((\"+folder\" . \"message\") . cache-buffer)"
)
(defmacro mew-cache-buffer-get (entry)
(` (cdr (, entry))))
(defmacro mew-cache-folder-get (entry)
(` (car (car (, entry)))))
(defmacro mew-cache-message-get (entry)
(` (cdr (car (, entry)))))
(defmacro mew-cache-entry-make (fld-msg buf)
(` (cons (, fld-msg) (, buf))))
(defmacro mew-cache-hit (fld-msg)
"Return value assosiated with key."
(` (mew-cache-buffer-get (assoc (, fld-msg) mew-cache))))
(defun mew-cache-sort (entry)
(let* ((pointer (cons nil mew-cache))
(top pointer))
(while (cdr pointer)
(if (equal (car (cdr pointer)) entry)
(setcdr pointer (cdr (cdr pointer)))
(setq pointer (cdr pointer))))
(setcdr pointer (list entry))
(setq mew-cache (cdr top))))
(defun mew-cache-add (fld-msg)
"Rutern associating buffer"
(let ((len (length mew-cache))
(buf nil))
(if (>= len mew-cache-size)
(prog1
(setq buf (mew-cache-buffer-get (car mew-cache)))
(setq mew-cache (nconc (cdr mew-cache)
(list (mew-cache-entry-make fld-msg buf))))
)
(prog1
(setq buf (get-buffer-create
(concat mew-buffer-cache (int-to-string len))))
(setq mew-cache (nconc mew-cache
(list (mew-cache-entry-make fld-msg buf))))
))
))
(defun mew-cache-delete ()
"Delete the most recent cache entry."
(setq mew-cache (nreverse (cdr (nreverse mew-cache)))))
(defun mew-cache-attribute-get (file)
;; 5th is modified time
;; 7th is file size
(let ((attr (file-attributes file)))
(list (nth 5 attr)
(nth 7 attr))))
(defun mew-cache-message (fld msg)
(let ((hit (mew-cache-hit (cons fld msg)))
(decode nil))
(if hit
(save-excursion
(mew-cache-sort (mew-cache-entry-make (cons fld msg) hit))
(set-buffer hit)
(if (and (not (mew-folder-newsp fld))
(not (equal mew-cache-attribute ;; buffer-local
(mew-cache-attribute-get
(mew-expand-folder fld msg)))))
;; cache is invalid
(setq decode t)))
(setq hit (mew-cache-add (cons fld msg)))
(setq decode t))
(if decode
(condition-case nil
(save-excursion
(set-buffer hit)
;; in cache buffer
(mew-decode fld msg))
(quit
(mew-cache-delete)
(error "MIME decoding is quitted."))))
hit ;; retrun value
))
(defun mew-cache-flush ()
"A function to flush all decoded messages in cache list."
(interactive)
(mew-decode-syntax-delete)
(let ((n 0))
(while (< n mew-cache-size)
(mew-kill-buffer (concat mew-buffer-cache (int-to-string n)))
(setq n (1+ n))
))
(mew-current-set 'cache nil)
(mew-current-set 'message nil)
(mew-current-set 'part nil)
(setq mew-cache nil)
)
(provide 'mew-cache)
;;; Copyright Notice:
;; Copyright (C) 1997, 1998 Mew developing team.
;; All rights reserved.
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;;
;; 1. Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; 2. Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; 3. All advertising materials mentioning features or use of this software
;; must display the following acknowledgement:
;; This product includes software developed by
;; Mew developing team and its contributors.
;; 4. Neither the name of the team nor the names of its contributors
;; may be used to endorse or promote products derived from this software
;; without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE TEAM AND CONTRIBUTORS ``AS IS'' AND
;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE
;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
;; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
;; BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
;; OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
;; IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;; mew-cache.el ends here
|
