elmo/mmelmo-imap4-2.el

   1 ;;; mmelmo-imap4-1.el -- MM backend of IMAP4 for ELMO (for FLIM 1.13.x).
   2
   3 ;; Copyright 1998,1999,2000 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 ;;
  28
  29 ;;; Code:
  30 ;;
  31 (require 'mmbuffer)
  32 (require 'mmelmo)
  33 (defvar mmelmo-imap4-threshold nil)
  34 (defvar mmelmo-imap4-skipped-parts nil)
  35 (defvar mmelmo-imap4-current-message-structure nil)
  36
  37 ;; Buffer local variable.
  38 (defvar mmelmo-imap4-fetched nil)
  39 (make-variable-buffer-local 'mmelmo-imap4-fetched)
  40
  41 (defun mmelmo-imap4-node-id-to-string (node-id)
  42   (let ((i (length node-id))
  43         result)
  44     (while (> i 0)
  45       (setq result
  46             (concat result
  47                     (if result
  48                         (concat "." (int-to-string
  49                                      (+ 1 (nth (- i 1) node-id))))
  50                       (int-to-string (or
  51                                       (+ 1 (nth (- i 1) node-id))
  52                                       0)))))
  53       (setq i (- i 1)))
  54     (or result "0")))
  55
  56 ;; parse IMAP4 body structure entity recursively.
  57 (defun mmelmo-imap4-parse-bodystructure-object (folder
  58                                                 number msgdb
  59                                                 node-id object parent)
  60   (cond
  61    ((listp (car object));; multipart
  62     (let (cur-obj children content-type ret-val (num 0))
  63       (setq ret-val
  64             (luna-make-entity
  65              (mm-expand-class-name 'elmo-imap4)
  66              :folder   folder
  67              :number   number
  68              :msgdb    msgdb
  69              :parent   parent
  70              :node-id  node-id))
  71       (while (and (setq cur-obj (car object))
  72                   (listp cur-obj))
  73         (setq children
  74               (append children
  75                       (list
  76                        (mmelmo-imap4-parse-bodystructure-object
  77                         folder number msgdb
  78                         (append (list num) node-id)
  79                         cur-obj
  80                         ret-val ; myself as parent
  81                         ))))
  82         (setq num (+ num 1))
  83         (setq object (cdr object)))
  84       (mime-entity-set-children-internal ret-val children)
  85       (setq content-type (list (cons 'type 'multipart)))
  86       (if (elmo-imap4-nth 0 object)
  87           (setq content-type (append content-type
  88                                      (list (cons 'subtype
  89                                                  (intern
  90                                                   (downcase
  91                                                    (elmo-imap4-nth
  92                                                     0
  93                                                     object))))))))
  94       (setq content-type (append content-type
  95                                  (mime-parse-parameters-from-list
  96                                   (elmo-imap4-nth 1 object))))
  97       (mime-entity-set-content-type-internal ret-val content-type)
  98       ret-val))
  99    (t ;; singlepart
 100     (let (content-type ret-val)
 101       ;; append size information into location
 102       (setq content-type (list (cons 'type (intern (downcase (car object))))))
 103       (if (elmo-imap4-nth 1 object)
 104           (setq content-type (append content-type
 105                                      (list
 106                                       (cons 'subtype
 107                                             (intern
 108                                              (downcase
 109                                               (elmo-imap4-nth 1 object))))))))
 110       (if (elmo-imap4-nth 2 object)
 111           (setq content-type (append content-type
 112                                      (mime-parse-parameters-from-list
 113                                       (elmo-imap4-nth 2 object)))))
 114       (setq ret-val
 115             (luna-make-entity
 116              (mm-expand-class-name 'elmo-imap4)
 117              :folder folder
 118              :number number
 119              :size (nth 6 object)
 120              :content-type content-type
 121              :parent parent
 122              :node-id node-id))
 123       (mime-entity-set-encoding-internal ret-val
 124                                          (and (elmo-imap4-nth 5 object)
 125                                               (downcase
 126                                                (elmo-imap4-nth 5 object))))
 127       ret-val))))
 128
 129 (defun mmelmo-imap4-multipart-p (entity)
 130   (eq (cdr (assq 'type (mime-entity-content-type entity))) 'multipart))
 131
 132 (defun mmelmo-imap4-rfc822part-p (entity)
 133   (eq (cdr (assq 'type (mime-entity-content-type entity))) 'rfc822))
 134
 135 (defun mmelmo-imap4-textpart-p (entity)
 136   (eq (cdr (assq 'type (mime-entity-content-type entity))) 'text))
 137
 138 (defun mmelmo-imap4-get-mime-entity (folder number msgdb)
 139   (let* ((spec (elmo-folder-get-spec folder))
 140          (session (elmo-imap4-get-session spec)))
 141     (elmo-imap4-session-select-mailbox session (elmo-imap4-spec-mailbox spec))
 142     (with-current-buffer (elmo-network-session-buffer session)
 143       (setq elmo-imap4-fetch-callback nil)
 144       (setq elmo-imap4-fetch-callback-data nil))
 145     (mmelmo-imap4-parse-bodystructure-object
 146      folder
 147      number
 148      msgdb
 149      nil ; node-id
 150      (elmo-imap4-response-value
 151       (elmo-imap4-response-value
 152        (elmo-imap4-send-command-wait
 153         session
 154         (format
 155          (if elmo-imap4-use-uid
 156              "uid fetch %s bodystructure"
 157            "fetch %s bodystructure")
 158          number)) 'fetch) 'bodystructure)
 159      nil ; parent
 160      )))
 161
 162 (defun mmelmo-imap4-read-part (entity)
 163   (if (or (not mmelmo-imap4-threshold)
 164           (not (mime-elmo-entity-size-internal entity))
 165           (and (mime-elmo-entity-size-internal entity)
 166                mmelmo-imap4-threshold
 167                (<= (mime-elmo-entity-size-internal entity)
 168                    mmelmo-imap4-threshold)))
 169       (progn
 170         (cond ((mmelmo-imap4-multipart-p entity)) ; noop
 171               (t (insert (elmo-imap4-read-part
 172                           (mime-elmo-entity-folder-internal entity)
 173                           (mime-elmo-entity-number-internal entity)
 174                           (mmelmo-imap4-node-id-to-string
 175                            (mime-entity-node-id-internal entity))))))
 176         (setq mmelmo-imap4-fetched t)
 177         (mime-buffer-entity-set-body-start-internal entity (point-min))
 178         (mime-buffer-entity-set-body-end-internal entity (point-max)))
 179     (setq mmelmo-imap4-fetched nil)
 180     (mime-buffer-entity-set-body-start-internal entity (point-min))
 181     (mime-buffer-entity-set-body-end-internal entity (point-min))
 182     (setq mmelmo-imap4-skipped-parts
 183           (append
 184            mmelmo-imap4-skipped-parts
 185            (list (mmelmo-imap4-node-id-to-string
 186                   (mime-entity-node-id-internal entity)))))))
 187
 188 (defun mmelmo-imap4-insert-body (entity)
 189   (mime-buffer-entity-set-body-start-internal entity (- (point) 1))
 190   (if (or (not mmelmo-imap4-threshold)
 191           (not (mime-elmo-entity-size-internal entity))
 192           (and (mime-elmo-entity-size-internal entity)
 193                mmelmo-imap4-threshold
 194                (<= (mime-elmo-entity-size-internal entity)
 195                    mmelmo-imap4-threshold)))
 196       (insert (elmo-imap4-read-part
 197                (mime-elmo-entity-folder-internal entity)
 198                (mime-elmo-entity-number-internal entity) "1"))
 199     (setq mmelmo-imap4-skipped-parts
 200           (append
 201            mmelmo-imap4-skipped-parts
 202            (list (mmelmo-imap4-node-id-to-string
 203                   (mime-entity-node-id-internal entity)))))))
 204
 205 ;;; mime-elmo-imap4-entity class definitions.
 206 (luna-define-class mime-elmo-imap4-entity (mime-buffer-entity)
 207                    (imap folder number msgdb size))
 208 (luna-define-internal-accessors 'mime-elmo-imap4-entity)
 209
 210 (luna-define-method initialize-instance ((entity mime-elmo-imap4-entity)
 211                                          &rest init-args)
 212   "The initialization method for elmo-imap4.
 213 mime-elmo-entity has its own instance variable
 214 `imap', `folder', `msgdb', and `size'.
 215 These value must be specified as argument for `luna-make-entity'."
 216   (apply (car (luna-class-find-functions
 217                (luna-find-class 'standard-object)
 218                'initialize-instance))
 219          entity init-args))
 220
 221 (defun mmelmo-imap4-mime-entity-buffer (entity)
 222   (if (mime-buffer-entity-buffer-internal entity)
 223       (save-excursion
 224         (set-buffer (mime-buffer-entity-buffer-internal entity))
 225         (unless (mime-root-entity-p entity)
 226           (unless mmelmo-imap4-fetched
 227             (setq mmelmo-imap4-skipped-parts nil) ; No need?
 228             (let ((mmelmo-imap4-threshold
 229                    (mime-elmo-entity-size-internal entity)))
 230               (mime-buffer-entity-set-buffer-internal entity nil)
 231               (message "Fetching skipped part...")
 232               (mmelmo-imap4-mime-entity-buffer entity)
 233               (message "Fetching skipped part...done."))
 234             (setq mmelmo-imap4-fetched t)))
 235         (mime-buffer-entity-buffer-internal entity))
 236     ;; No buffer exist.
 237     (save-excursion
 238       (set-buffer (get-buffer-create
 239                    (concat mmelmo-entity-buffer-name
 240                            (mmelmo-imap4-node-id-to-string
 241                             (mime-entity-node-id-internal entity)))))
 242       (mmelmo-original-mode)
 243       (mime-buffer-entity-set-buffer-internal entity (current-buffer))
 244       (let ((buffer-read-only nil))
 245         (erase-buffer)
 246         (mime-entity-node-id entity)
 247         (if (mime-root-entity-p entity)
 248             (progn
 249               ;; root entity
 250               (setq mmelmo-imap4-current-message-structure entity)
 251               (setq mime-message-structure entity)
 252               (setq mmelmo-imap4-skipped-parts nil)
 253               ;; insert header
 254               (insert (elmo-imap4-read-part
 255                        (mime-elmo-entity-folder-internal entity)
 256                        (mime-elmo-entity-number-internal entity)
 257                        "header"))
 258               (mime-buffer-entity-set-header-start-internal
 259                entity (point-min))
 260               (mime-buffer-entity-set-header-end-internal
 261                entity (max (- (point) 1) 1))
 262               (if (null (mime-entity-children-internal entity))
 263                   (progn
 264                     (mime-buffer-entity-set-body-start-internal
 265                      entity (point))
 266                     ;; insert body if size is OK.
 267                     (mmelmo-imap4-insert-body entity)
 268                     (mime-buffer-entity-set-body-end-internal
 269                      entity (point)))))
 270           (setq mime-message-structure
 271                 mmelmo-imap4-current-message-structure)
 272           (mmelmo-imap4-read-part entity)))
 273       (current-buffer))))
 274
 275 ; mime-entity-children
 276 (luna-define-method mime-entity-children ((entity
 277                                            mime-elmo-imap4-entity))
 278   (mime-entity-children-internal entity))
 279
 280 ;; override generic function for dynamic body fetching.
 281 (luna-define-method mime-entity-body ((entity
 282                                        mime-elmo-imap4-entity))
 283   (save-excursion
 284     (set-buffer (mmelmo-imap4-mime-entity-buffer entity))
 285     (buffer-substring (mime-buffer-entity-body-start-internal entity)
 286                       (mime-buffer-entity-body-end-internal entity))))
 287
 288 (luna-define-method mime-entity-content ((entity
 289                                           mime-elmo-imap4-entity))
 290   (save-excursion
 291     (set-buffer (mmelmo-imap4-mime-entity-buffer entity))
 292     (mime-decode-string
 293      (buffer-substring (mime-buffer-entity-body-start-internal entity)
 294                        (mime-buffer-entity-body-end-internal entity))
 295      (mime-entity-encoding entity))))
 296
 297 (luna-define-method mime-entity-fetch-field ((entity mime-elmo-imap4-entity)
 298                                              field-name)
 299   (save-excursion
 300     (save-restriction
 301       (when (mime-buffer-entity-buffer-internal entity)
 302         (set-buffer (mime-buffer-entity-buffer-internal entity))
 303         (if (and (mime-buffer-entity-header-start-internal entity)
 304                  (mime-buffer-entity-header-end-internal entity))
 305             (progn
 306               (narrow-to-region
 307                (mime-buffer-entity-header-start-internal entity)
 308                (mime-buffer-entity-header-end-internal entity))
 309               (std11-fetch-field field-name))
 310           nil)))))
 311
 312 (luna-define-method mime-insert-header ((entity mime-elmo-imap4-entity)
 313                                         &optional invisible-fields
 314                                         visible-fields)
 315   (mmelmo-insert-sorted-header-from-buffer
 316    (mmelmo-imap4-mime-entity-buffer entity)
 317    (mime-buffer-entity-header-start-internal entity)
 318    (mime-buffer-entity-header-end-internal entity)
 319    invisible-fields visible-fields))
 320
 321 (luna-define-method mime-entity-header-buffer ((entity mime-elmo-imap4-entity))
 322   (mime-buffer-entity-buffer-internal entity))
 323
 324 (luna-define-method mime-entity-body-buffer ((entity mime-elmo-imap4-entity))
 325   (mime-buffer-entity-buffer-internal entity))
 326
 327 (luna-define-method mime-write-entity-content ((entity mime-elmo-imap4-entity)
 328                                                filename)
 329   (let ((mmelmo-imap4-threshold (mime-elmo-entity-size-internal entity)))
 330     (if (mime-buffer-entity-buffer-internal entity)
 331         (save-excursion
 332           (set-buffer (mime-buffer-entity-buffer-internal entity))
 333           (unless mmelmo-imap4-fetched
 334             (setq mmelmo-imap4-skipped-parts nil) ; No need?
 335             (mime-buffer-entity-set-buffer-internal entity nil) ; To re-fetch.
 336             ))
 337       (unless mmelmo-imap4-fetched
 338         (setq mmelmo-imap4-skipped-parts nil) ; No need?
 339         (let ((mmelmo-imap4-threshold (mime-elmo-entity-size-internal entity)))
 340           (mime-buffer-entity-set-buffer-internal entity nil) ; To re-fetch.
 341           (message "Fetching skipped part...")
 342           (mime-buffer-entity-set-buffer-internal
 343            entity
 344            (mmelmo-imap4-mime-entity-buffer entity))
 345           (message "Fetching skipped part...done.")))
 346       (with-current-buffer (mime-buffer-entity-buffer-internal entity)
 347         (mime-write-decoded-region
 348          (mime-buffer-entity-body-start-internal entity)
 349          (mime-buffer-entity-body-end-internal entity)
 350          filename
 351          (or (mime-entity-encoding entity) "7bit"))))))
 352
 353 (provide 'mmelmo-imap4-2)
 354
 355 ;;; mmelmo-imap4-2.el ends here