elmo/elmo-map.el

   1 ;;; elmo-map.el --- A ELMO folder class with message number mapping.
   2
   3 ;; Copyright (C) 2000 Yuuichi Teranishi <teranisi@gohome.org>
   4
   5 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   6 ;; Keywords: mail, net news
   7
   8 ;; This file is part of ELMO (Elisp Library for Message Orchestration).
   9
  10 ;; This program is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14 ;;
  15 ;; This program is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19 ;;
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24 ;;
  25
  26 ;;; Commentary:
  27 ;; Folders which do not have unique message numbers but unique message names
  28 ;; should inherit this folder.
  29
  30 ;;; Code:
  31 ;;
  32 (require 'elmo)
  33 (require 'elmo-msgdb)
  34
  35 (eval-when-compile (require 'cl))
  36
  37 (eval-and-compile
  38   ;; location-hash: location->number mapping
  39   ;; number-hash:   number->location mapping
  40   (luna-define-class elmo-map-folder (elmo-folder)
  41                      (location-alist number-max location-hash))
  42   (luna-define-internal-accessors 'elmo-map-folder))
  43
  44 (defun elmo-map-folder-numbers-to-locations (folder numbers)
  45   (let (locations pair)
  46     (dolist (number numbers)
  47       (if (setq pair (elmo-get-hash-val
  48                       (concat "#" (int-to-string number))
  49                       (elmo-map-folder-location-hash-internal folder)))
  50           (setq locations (cons (cdr pair) locations))))
  51     (nreverse locations)))
  52
  53 (defun elmo-map-folder-locations-to-numbers (folder locations)
  54   (let (numbers pair)
  55     (dolist (location locations)
  56       (if (setq pair (elmo-get-hash-val
  57                       location
  58                       (elmo-map-folder-location-hash-internal folder)))
  59           (setq numbers (cons (car pair) numbers))))
  60     (nreverse numbers)))
  61
  62 (luna-define-generic elmo-map-folder-list-message-locations (folder)
  63   "Return a location list of the FOLDER.")
  64
  65 (luna-define-generic elmo-map-folder-unmark-important (folder locations)
  66   "")
  67
  68 (luna-define-generic elmo-map-folder-mark-as-important (folder locations)
  69   "")
  70
  71 (luna-define-generic elmo-map-folder-unmark-read (folder locations)
  72   "")
  73
  74 (luna-define-generic elmo-map-folder-mark-as-read (folder locations)
  75   "")
  76
  77 (luna-define-generic elmo-map-folder-unmark-answered (folder locations)
  78   "")
  79
  80 (luna-define-generic elmo-map-folder-mark-as-answered (folder locations)
  81   "")
  82
  83 (luna-define-generic elmo-map-message-fetch (folder location
  84                                                     strategy
  85                                                     &optional
  86                                                     section
  87                                                     unseen)
  88   "")
  89
  90 (luna-define-generic elmo-map-folder-list-unreads (folder)
  91   "")
  92
  93 (luna-define-method elmo-map-folder-list-unreads ((folder elmo-map-folder))
  94   t)
  95
  96 (luna-define-generic elmo-map-folder-list-importants (folder)
  97   "")
  98
  99 (luna-define-method elmo-map-folder-list-importants ((folder elmo-map-folder))
 100   t)
 101
 102 (luna-define-generic elmo-map-folder-list-answereds (folder)
 103   "")
 104
 105 (luna-define-method elmo-map-folder-list-answereds ((folder elmo-map-folder))
 106   t)
 107
 108 (luna-define-generic elmo-map-folder-delete-messages (folder locations)
 109   "")
 110
 111 (luna-define-method elmo-folder-status ((folder elmo-map-folder))
 112   (elmo-folder-open-internal folder)
 113   (elmo-folder-set-killed-list-internal
 114    folder
 115    (elmo-msgdb-killed-list-load (elmo-folder-msgdb-path folder)))
 116   (let ((numbers (mapcar
 117                   'car
 118                   (elmo-map-folder-location-alist-internal folder))))
 119     (setq numbers (elmo-living-messages numbers (elmo-folder-killed-list-internal folder)))
 120     (prog1
 121         (cons (elmo-max-of-list numbers)
 122               (length numbers))
 123       ;; Don't close after status.
 124       (unless (elmo-folder-reserve-status-p folder)
 125         (elmo-folder-close-internal folder)))))
 126
 127 (defun elmo-map-message-number (folder location)
 128   "Return number of the message in the FOLDER with LOCATION."
 129   (car (elmo-get-hash-val
 130         location
 131         (elmo-map-folder-location-hash-internal folder))))
 132
 133 (defun elmo-map-message-location (folder number)
 134   "Return location of the message in the FOLDER with NUMBER."
 135   (cdr (elmo-get-hash-val
 136         (concat "#" (int-to-string number))
 137         (elmo-map-folder-location-hash-internal folder))))
 138
 139 (luna-define-method elmo-folder-pack-number ((folder elmo-map-folder))
 140   (let* ((msgdb (elmo-folder-msgdb folder))
 141          (old-number-alist (elmo-msgdb-get-number-alist msgdb))
 142          (old-overview (elmo-msgdb-get-overview msgdb))
 143          (old-mark-alist (elmo-msgdb-get-mark-alist msgdb))
 144          (old-location (elmo-map-folder-location-alist-internal folder))
 145          old-number overview number-alist mark-alist location
 146          mark (number 1))
 147     (setq overview old-overview)
 148     (while old-overview
 149       (setq old-number
 150             (elmo-msgdb-overview-entity-get-number (car old-overview)))
 151       (elmo-msgdb-overview-entity-set-number (car old-overview) number)
 152       (setq number-alist
 153             (cons (cons number (cdr (assq old-number old-number-alist)))
 154                   number-alist))
 155       (when (setq mark (cadr (assq old-number old-mark-alist)))
 156         (setq mark-alist
 157               (elmo-msgdb-mark-append
 158                mark-alist number mark)))
 159       (setq location
 160             (cons (cons number
 161                         (elmo-map-message-location folder old-number))
 162                   location))
 163       (setq number (1+ number))
 164       (setq old-overview (cdr old-overview)))
 165     (elmo-map-folder-location-setup folder (nreverse location))
 166     (elmo-folder-set-msgdb-internal
 167      folder
 168      (elmo-make-msgdb overview
 169                       (nreverse number-alist)
 170                       (nreverse mark-alist)))))
 171
 172 (defun elmo-map-folder-location-setup (folder locations)
 173   (elmo-map-folder-set-location-alist-internal
 174    folder
 175    locations)
 176   (elmo-map-folder-set-location-hash-internal
 177    folder (elmo-make-hash
 178            (* 2 (length locations))))
 179   (elmo-map-folder-set-number-max-internal folder 0)
 180   ;; Set number-max and hashtables.
 181   (dolist (location-cons locations)
 182     (if (< (elmo-map-folder-number-max-internal folder)
 183            (car location-cons))
 184         (elmo-map-folder-set-number-max-internal folder (car location-cons)))
 185     (elmo-set-hash-val (cdr location-cons)
 186                        location-cons
 187                        (elmo-map-folder-location-hash-internal folder))
 188     (elmo-set-hash-val (concat "#" (int-to-string (car location-cons)))
 189                        location-cons
 190                        (elmo-map-folder-location-hash-internal folder))))
 191
 192 (defun elmo-map-folder-update-locations (folder locations)
 193   ;; A subroutine to make location-alist.
 194   ;; location-alist is existing location-alist.
 195   ;; locations is the newest locations.
 196   (let* ((location-alist (elmo-map-folder-location-alist-internal folder))
 197          (locations-in-db (mapcar 'cdr location-alist))
 198          new-locs new-alist deleted-locs pair i)
 199     (setq new-locs
 200           (elmo-delete-if (function
 201                            (lambda (x) (member x locations-in-db)))
 202                           locations))
 203     (setq deleted-locs
 204           (elmo-delete-if (function
 205                            (lambda (x) (member x locations)))
 206                           locations-in-db))
 207     (dolist (location deleted-locs)
 208       (setq location-alist
 209             (delq (setq pair
 210                         (elmo-get-hash-val
 211                          location
 212                          (elmo-map-folder-location-hash-internal
 213                           folder)))
 214                   location-alist))
 215       (when pair
 216         (elmo-clear-hash-val (concat "#" (int-to-string (car pair)))
 217                              (elmo-map-folder-location-hash-internal
 218                               folder))
 219         (elmo-clear-hash-val location
 220                              (elmo-map-folder-location-hash-internal
 221                               folder))))
 222     (setq i (elmo-map-folder-number-max-internal folder))
 223     (dolist (location new-locs)
 224       (setq i (1+ i))
 225       (elmo-map-folder-set-number-max-internal folder i)
 226       (setq new-alist (cons (setq pair (cons i location)) new-alist))
 227       (setq new-alist (nreverse new-alist))
 228       (elmo-set-hash-val (concat "#" (int-to-string i))
 229                          pair
 230                          (elmo-map-folder-location-hash-internal
 231                           folder))
 232       (elmo-set-hash-val location
 233                          pair
 234                          (elmo-map-folder-location-hash-internal
 235                           folder)))
 236     (setq location-alist
 237           (sort (nconc location-alist new-alist)
 238                 (lambda (x y) (< (car x) (car y)))))
 239     (elmo-map-folder-set-location-alist-internal folder location-alist)))
 240
 241 (luna-define-method elmo-folder-open-internal ((folder elmo-map-folder))
 242   (elmo-map-folder-location-setup
 243    folder
 244    (elmo-msgdb-location-load (elmo-folder-msgdb-path folder)))
 245   (if (elmo-folder-plugged-p folder)
 246       (elmo-map-folder-update-locations
 247        folder
 248        (elmo-map-folder-list-message-locations folder))))
 249
 250 (luna-define-method elmo-folder-commit :after ((folder elmo-map-folder))
 251   (when (elmo-folder-persistent-p folder)
 252     (elmo-msgdb-location-save (elmo-folder-msgdb-path folder)
 253                               (elmo-map-folder-location-alist-internal
 254                                folder))))
 255
 256 (luna-define-method elmo-folder-close-internal ((folder elmo-map-folder))
 257   (elmo-map-folder-set-location-alist-internal folder nil)
 258   (elmo-map-folder-set-location-hash-internal folder nil))
 259
 260 (luna-define-method elmo-folder-check ((folder elmo-map-folder))
 261   (elmo-map-folder-update-locations
 262    folder
 263    (elmo-map-folder-list-message-locations folder)))
 264
 265 (luna-define-method elmo-folder-clear :around ((folder elmo-map-folder)
 266                                                &optional keep-killed)
 267   (unless keep-killed
 268     (elmo-map-folder-set-number-max-internal folder 0)
 269     (elmo-map-folder-set-location-alist-internal folder nil)
 270     ;; clear hashtable.
 271     (elmo-map-folder-set-location-hash-internal folder (elmo-make-hash)))
 272   (luna-call-next-method))
 273
 274 (luna-define-method elmo-folder-list-messages-internal
 275   ((folder elmo-map-folder) &optional nohide)
 276   (mapcar 'car (elmo-map-folder-location-alist-internal folder)))
 277
 278 (luna-define-method elmo-folder-unmark-important :before ((folder
 279                                                            elmo-map-folder)
 280                                                           numbers)
 281   (elmo-map-folder-unmark-important
 282    folder
 283    (elmo-map-folder-numbers-to-locations folder numbers)))
 284
 285 (luna-define-method elmo-folder-mark-as-important :before ((folder
 286                                                             elmo-map-folder)
 287                                                            numbers)
 288   (elmo-map-folder-mark-as-important
 289    folder
 290    (elmo-map-folder-numbers-to-locations folder numbers)))
 291
 292 (luna-define-method elmo-folder-unmark-read :before ((folder elmo-map-folder)
 293                                                      numbers
 294                                                      &optional ignore-flags)
 295   (unless ignore-flags
 296     (elmo-map-folder-unmark-read
 297      folder
 298      (elmo-map-folder-numbers-to-locations folder numbers))))
 299
 300 (luna-define-method elmo-folder-mark-as-read :before ((folder
 301                                                        elmo-map-folder)
 302                                                       numbers
 303                                                       &optional ignore-flags)
 304   (unless ignore-flags
 305     (elmo-map-folder-mark-as-read
 306      folder
 307      (elmo-map-folder-numbers-to-locations folder numbers))))
 308
 309 (luna-define-method elmo-folder-unmark-answered :before ((folder
 310                                                           elmo-map-folder)
 311                                                          numbers)
 312   (elmo-map-folder-unmark-answered
 313    folder
 314    (elmo-map-folder-numbers-to-locations folder numbers)))
 315
 316 (luna-define-method elmo-folder-mark-as-answered :before ((folder
 317                                                           elmo-map-folder)
 318                                                          numbers)
 319   (elmo-map-folder-mark-as-answered
 320    folder
 321    (elmo-map-folder-numbers-to-locations folder numbers)))
 322
 323 (luna-define-method elmo-message-fetch-internal ((folder elmo-map-folder)
 324                                                  number strategy
 325                                                  &optional section unread)
 326   (elmo-map-message-fetch
 327    folder
 328    (elmo-map-message-location folder number)
 329    strategy section unread))
 330
 331 (luna-define-method elmo-folder-list-unreads :around ((folder elmo-map-folder))
 332   (let ((locations (elmo-map-folder-list-unreads folder)))
 333     (if (listp locations)
 334         (elmo-map-folder-locations-to-numbers folder locations)
 335       (luna-call-next-method))))
 336
 337 (luna-define-method elmo-folder-list-importants :around ((folder
 338                                                           elmo-map-folder))
 339   (let ((locations (elmo-map-folder-list-importants folder)))
 340     (if (listp locations)
 341         (elmo-map-folder-locations-to-numbers folder locations)
 342       (luna-call-next-method))))
 343
 344 (luna-define-method elmo-folder-list-answereds :around ((folder
 345                                                          elmo-map-folder))
 346   (let ((locations (elmo-map-folder-list-answereds folder)))
 347     (if (listp locations)
 348         (elmo-map-folder-locations-to-numbers folder locations)
 349       (luna-call-next-method))))
 350
 351 (luna-define-method elmo-folder-delete-messages ((folder elmo-map-folder)
 352                                                  numbers)
 353   (elmo-map-folder-delete-messages
 354    folder
 355    (elmo-map-folder-numbers-to-locations folder numbers))
 356   (dolist (number numbers)
 357     (elmo-map-folder-set-location-alist-internal
 358      folder
 359      (delq (elmo-get-hash-val
 360             (concat "#" (int-to-string number))
 361             (elmo-map-folder-location-hash-internal
 362              folder))
 363            (elmo-map-folder-location-alist-internal folder))))
 364   t) ; success
 365
 366 (require 'product)
 367 (product-provide (provide 'elmo-map) (require 'elmo-version))
 368
 369 ;;; elmo-map.el ends here