elmo/elmo-imap4.el

   1 ;;; elmo-imap4.el --- IMAP4 Interface for ELMO.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4 ;; Copyright (C) 1999,2000      Kenichi OKADA <okada@opaopa.org>
   5 ;; Copyright (C) 2000           OKAZAKI Tetsurou <okazaki@be.to>
   6 ;; Copyright (C) 2000           Daiki Ueno <ueno@unixuser.org>
   7
   8 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   9 ;;      Kenichi OKADA <okada@opaopa.org>
  10 ;;      OKAZAKI Tetsurou <okazaki@be.to>
  11 ;;      Daiki Ueno <ueno@unixuser.org>
  12 ;; Keywords: mail, net news
  13
  14 ;; This file is part of ELMO (Elisp Library for Message Orchestration).
  15
  16 ;; This program is free software; you can redistribute it and/or modify
  17 ;; it under the terms of the GNU General Public License as published by
  18 ;; the Free Software Foundation; either version 2, or (at your option)
  19 ;; any later version.
  20 ;;
  21 ;; This program is distributed in the hope that it will be useful,
  22 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 ;; GNU General Public License for more details.
  25 ;;
  26 ;; You should have received a copy of the GNU General Public License
  27 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  28 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  29 ;; Boston, MA 02111-1307, USA.
  30 ;;
  31
  32 ;;; Commentary:
  33 ;;
  34 ;; Origin of IMAP parser part is imap.el, included in Gnus.
  35 ;;
  36 ;;    Copyright (C) 1998, 1999, 2000
  37 ;;    Free Software Foundation, Inc.
  38 ;;    Author: Simon Josefsson <jas@pdc.kth.se>
  39 ;;
  40
  41 (require 'elmo-vars)
  42 (require 'elmo-util)
  43 (require 'elmo-date)
  44 (require 'elmo-msgdb)
  45 (require 'elmo-cache)
  46 (require 'elmo)
  47 (require 'elmo-net)
  48 (require 'utf7)
  49 (require 'elmo-mime)
  50
  51 ;;; Code:
  52 (eval-when-compile (require 'cl))
  53
  54 (defvar elmo-imap4-disuse-server-flag-mailbox-regexp "^#mh" ; UW imapd
  55   "Regexp to match IMAP4 mailbox names whose message flags on server should be ignored.
  56 (Except `\\Deleted' flag).")
  57
  58 (defvar elmo-imap4-overview-fetch-chop-length 200
  59   "*Number of overviews to fetch in one request.")
  60
  61 ;; c.f. rfc2683 3.2.1.5 Long Command Lines
  62 ;;
  63 ;; "A client should limit the length of the command lines it generates
  64 ;;  to approximately 1000 octets (including all quoted strings but not
  65 ;;  including literals). If the client is unable to group things into
  66 ;;  ranges so that the command line is within that length, it should
  67 ;;  split the request into multiple commands. The client should use
  68 ;;  literals instead of long quoted strings, in order to keep the command
  69 ;;  length down.
  70 ;;  For its part, a server should allow for a command line of at least
  71 ;;  8000 octets. This provides plenty of leeway for accepting reasonable
  72 ;;  length commands from clients. The server should send a BAD response
  73 ;;  to a command that does not end within the server's maximum accepted
  74 ;;  command length. "
  75
  76 ;; To limit command line length, chop number set.
  77 (defvar elmo-imap4-number-set-chop-length 1000
  78   "*Number of messages to specify as a number-set argument for one request.")
  79
  80 (defvar elmo-imap4-force-login nil
  81   "*Non-nil forces to try 'login' if there is no 'auth' capability in imapd.")
  82
  83 (defvar elmo-imap4-use-select-to-update-status nil
  84   "*Some imapd have to send select command to update status.
  85 (ex. UW imapd 4.5-BETA?).  For these imapd, you must set this variable t.")
  86
  87 (defvar elmo-imap4-use-modified-utf7 nil
  88   "*Use mofidied UTF-7 (rfc2060) encoding for IMAP4 folder name.")
  89
  90 (defvar elmo-imap4-use-cache t
  91   "Use cache in imap4 folder.")
  92
  93 (defvar elmo-imap4-extra-namespace-alist
  94   '(("^\\({.*/nntp}\\).*$" . ".")) ; Default is for UW's remote nntp mailbox...
  95   "Extra namespace alist.
  96 A list of cons cell like: (REGEXP . DELIMITER).
  97 REGEXP should have a grouping for namespace prefix.")
  98 ;;
  99 ;;; internal variables
 100 ;;
 101 (defvar elmo-imap4-seq-prefix "elmo-imap4")
 102 (defvar elmo-imap4-seqno 0)
 103 (defvar elmo-imap4-use-uid t
 104   "Use UID as message number.")
 105
 106 (defvar elmo-imap4-current-response nil)
 107 (defvar elmo-imap4-status nil)
 108 (defvar elmo-imap4-reached-tag "elmo-imap40")
 109
 110 ;;; buffer local variables
 111 (defvar elmo-imap4-default-hierarchy-delimiter "/")
 112
 113 (defvar elmo-imap4-server-capability nil)
 114 (defvar elmo-imap4-server-namespace nil)
 115
 116 (defvar elmo-imap4-parsing nil) ; indicates parsing.
 117
 118 (defvar elmo-imap4-fetch-callback nil)
 119 (defvar elmo-imap4-fetch-callback-data nil)
 120 (defvar elmo-imap4-status-callback nil)
 121 (defvar elmo-imap4-status-callback-data nil)
 122
 123 (defvar elmo-imap4-server-diff-async-callback nil)
 124 (defvar elmo-imap4-server-diff-async-callback-data nil)
 125
 126 ;;; progress...(no use?)
 127 (defvar elmo-imap4-count-progress nil)
 128 (defvar elmo-imap4-count-progress-message nil)
 129 (defvar elmo-imap4-progress-count nil)
 130
 131 ;;; XXX Temporal implementation
 132 (defvar elmo-imap4-current-msgdb nil)
 133 (defvar elmo-imap4-seen-messages nil)
 134
 135 (defvar elmo-imap4-local-variables
 136   '(elmo-imap4-status
 137     elmo-imap4-current-response
 138     elmo-imap4-seqno
 139     elmo-imap4-parsing
 140     elmo-imap4-reached-tag
 141     elmo-imap4-count-progress
 142     elmo-imap4-count-progress-message
 143     elmo-imap4-progress-count
 144     elmo-imap4-fetch-callback
 145     elmo-imap4-fetch-callback-data
 146     elmo-imap4-status-callback
 147     elmo-imap4-status-callback-data
 148     elmo-imap4-current-msgdb
 149     elmo-imap4-seen-messages))
 150
 151 ;;;;
 152
 153 (defconst elmo-imap4-quoted-specials-list '(?\\ ?\"))
 154
 155 (defconst elmo-imap4-non-atom-char-regex
 156   (eval-when-compile
 157     (concat "[^" "]!#$&'+,./0-9:;<=>?@A-Z[^_`a-z|}~-" "]")))
 158
 159 (defconst elmo-imap4-non-text-char-regex
 160   (eval-when-compile
 161     (concat "[^"
 162             "]\x01-\x09\x0b\x0c\x0e-\x1f\x7f !\"#$%&'()*+,./0-9:;<=>?@A-Z[\\^_`a-z{|}~-"
 163             "]")))
 164
 165 (defconst elmo-imap4-literal-threshold 1024
 166  "Limitation of characters that can be used in a quoted string.")
 167
 168 ;; For debugging.
 169 (defvar elmo-imap4-debug nil
 170   "Non-nil forces IMAP4 folder as debug mode.
 171 Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
 172
 173 (defvar elmo-imap4-debug-inhibit-logging nil)
 174
 175 ;;; ELMO IMAP4 folder
 176 (eval-and-compile
 177   (luna-define-class elmo-imap4-folder (elmo-net-folder)
 178                      (mailbox))
 179   (luna-define-internal-accessors 'elmo-imap4-folder))
 180
 181 ;;; Session
 182 (eval-and-compile
 183   (luna-define-class elmo-imap4-session (elmo-network-session)
 184                      (capability current-mailbox read-only))
 185   (luna-define-internal-accessors 'elmo-imap4-session))
 186
 187 ;;; MIME-ELMO-IMAP Location
 188 (eval-and-compile
 189   (luna-define-class mime-elmo-imap-location
 190                      (mime-imap-location)
 191                      (folder number rawbuf strategy))
 192   (luna-define-internal-accessors 'mime-elmo-imap-location))
 193
 194 ;;; Debug
 195 (defmacro elmo-imap4-debug (message &rest args)
 196   (` (if elmo-imap4-debug
 197          (elmo-imap4-debug-1 (, message) (,@ args)))))
 198
 199 (defun elmo-imap4-debug-1 (message &rest args)
 200   (with-current-buffer (get-buffer-create "*IMAP4 DEBUG*")
 201     (goto-char (point-max))
 202     (if elmo-imap4-debug-inhibit-logging
 203         (insert "NO LOGGING\n")
 204       (insert (apply 'format message args) "\n"))))
 205
 206 (defsubst elmo-imap4-decode-folder-string (string)
 207   (if elmo-imap4-use-modified-utf7
 208       (utf7-decode-string string 'imap)
 209     string))
 210
 211 (defsubst elmo-imap4-encode-folder-string (string)
 212   (if elmo-imap4-use-modified-utf7
 213       (utf7-encode-string string 'imap)
 214     string))
 215
 216 ;;; Response
 217
 218 (defmacro elmo-imap4-response-continue-req-p (response)
 219   "Returns non-nil if RESPONSE is '+' response."
 220   (` (assq 'continue-req (, response))))
 221
 222 (defmacro elmo-imap4-response-ok-p (response)
 223   "Returns non-nil if RESPONSE is an 'OK' response."
 224   (` (assq 'ok (, response))))
 225
 226 (defmacro elmo-imap4-response-bye-p (response)
 227   "Returns non-nil if RESPONSE is an 'BYE' response."
 228   (` (assq 'bye (, response))))
 229
 230 (defmacro elmo-imap4-response-value (response symbol)
 231   "Get value of the SYMBOL from RESPONSE."
 232   (` (nth 1 (assq (, symbol) (, response)))))
 233
 234 (defsubst elmo-imap4-response-value-all (response symbol)
 235   "Get all value of the SYMBOL from RESPONSE."
 236   (let (matched)
 237     (while response
 238       (if (eq (car (car response)) symbol)
 239           (setq matched (nconc matched (nth 1 (car response)))))
 240       (setq response (cdr response)))
 241     matched))
 242
 243 (defmacro elmo-imap4-response-error-text (response)
 244   "Returns text of NO, BAD, BYE response."
 245   (` (nth 1 (or (elmo-imap4-response-value (, response) 'no)
 246                 (elmo-imap4-response-value (, response) 'bad)
 247                 (elmo-imap4-response-value (, response) 'bye)))))
 248
 249 (defmacro elmo-imap4-response-bodydetail-text (response)
 250   "Returns text of BODY[section]<partial>."
 251   (` (nth 3 (assq 'bodydetail (, response)))))
 252
 253 ;;; Session commands.
 254
 255 ; (defun elmo-imap4-send-command-wait (session command)
 256 ;   "Send COMMAND to the SESSION and wait for response.
 257 ; Returns RESPONSE (parsed lisp object) of IMAP session."
 258 ;   (elmo-imap4-read-response session
 259 ;                           (elmo-imap4-send-command
 260 ;                            session
 261 ;                            command)))
 262
 263 (defun elmo-imap4-send-command-wait (session command)
 264   "Send COMMAND to the SESSION.
 265 Returns RESPONSE (parsed lisp object) of IMAP session.
 266 If response is not `OK', causes error with IMAP response text."
 267   (elmo-imap4-accept-ok session
 268                         (elmo-imap4-send-command
 269                          session
 270                          command)))
 271
 272 (defun elmo-imap4-send-command (session command)
 273   "Send COMMAND to the SESSION.
 274 Returns a TAG string which is assigned to the COMMAND."
 275   (let* ((command-args (if (listp command)
 276                            command
 277                          (list command)))
 278          (process (elmo-network-session-process-internal session))
 279          cmdstr tag token kind)
 280     (with-current-buffer (process-buffer process)
 281       (setq tag (concat elmo-imap4-seq-prefix
 282                         (number-to-string
 283                          (setq elmo-imap4-seqno (+ 1 elmo-imap4-seqno)))))
 284       (setq cmdstr (concat tag " "))
 285       ;; (erase-buffer) No need.
 286       (goto-char (point-min))
 287       (when (elmo-imap4-response-bye-p elmo-imap4-current-response)
 288         (elmo-imap4-process-bye session))
 289       (setq elmo-imap4-current-response nil)
 290       (if elmo-imap4-parsing
 291           (error "IMAP process is running. Please wait (or plug again)"))
 292       (setq elmo-imap4-parsing t)
 293       (elmo-imap4-debug "<-(%s)- %s" tag command)
 294       (while (setq token (car command-args))
 295         (cond ((stringp token)   ; formatted
 296                (setq cmdstr (concat cmdstr token)))
 297               ((listp token)     ; unformatted
 298                (setq kind (car token))
 299                (cond ((eq kind 'atom)
 300                       (setq cmdstr (concat cmdstr (nth 1 token))))
 301                      ((eq kind 'quoted)
 302                       (setq cmdstr (concat
 303                                     cmdstr
 304                                     (elmo-imap4-format-quoted (nth 1 token)))))
 305                      ((eq kind 'literal)
 306                       (setq cmdstr (concat cmdstr
 307                                            (format "{%d}" (nth 2 token))))
 308                       (process-send-string process cmdstr)
 309                       (process-send-string process "\r\n")
 310                       (setq cmdstr nil)
 311                       (elmo-imap4-accept-continue-req session)
 312                       (cond ((stringp (nth 1 token))
 313                              (setq cmdstr (nth 1 token)))
 314                             ((bufferp (nth 1 token))
 315                              (with-current-buffer (nth 1 token)
 316                                (process-send-region
 317                                 process
 318                                 (point-min)
 319                                 (+ (point-min) (nth 2 token)))))
 320                             (t
 321                              (error "Wrong argument for literal"))))
 322                      (t
 323                       (error "Unknown token kind %s" kind))))
 324               (t
 325                (error "Invalid argument")))
 326         (setq command-args (cdr command-args)))
 327       (if cmdstr
 328           (process-send-string process cmdstr))
 329       (process-send-string process "\r\n")
 330       tag)))
 331
 332 (defun elmo-imap4-send-string (session string)
 333   "Send STRING to the SESSION."
 334   (with-current-buffer (process-buffer
 335                         (elmo-network-session-process-internal session))
 336     (setq elmo-imap4-current-response nil)
 337     (goto-char (point-min))
 338     (elmo-imap4-debug "<-- %s" string)
 339     (process-send-string (elmo-network-session-process-internal session)
 340                          string)
 341     (process-send-string (elmo-network-session-process-internal session)
 342                          "\r\n")))
 343
 344 (defun elmo-imap4-read-response (session tag)
 345   "Read parsed response from SESSION.
 346 TAG is the tag of the command"
 347   (with-current-buffer (process-buffer
 348                         (elmo-network-session-process-internal session))
 349     (while (not (or (string= tag elmo-imap4-reached-tag)
 350                     (elmo-imap4-response-bye-p elmo-imap4-current-response)))
 351       (when (memq (process-status
 352                    (elmo-network-session-process-internal session))
 353                   '(open run))
 354         (accept-process-output (elmo-network-session-process-internal session)
 355                                1)))
 356     (elmo-imap4-debug "=>%s" (prin1-to-string elmo-imap4-current-response))
 357     (setq elmo-imap4-parsing nil)
 358     elmo-imap4-current-response))
 359
 360 (defsubst elmo-imap4-read-untagged (process)
 361   (with-current-buffer (process-buffer process)
 362     (while (not elmo-imap4-current-response)
 363       (accept-process-output process 1))
 364     (elmo-imap4-debug "=>%s" (prin1-to-string elmo-imap4-current-response))
 365     elmo-imap4-current-response))
 366
 367 (defun elmo-imap4-read-continue-req (session)
 368   "Returns a text following to continue-req in SESSION.
 369 If response is not `+' response, returns nil."
 370   (elmo-imap4-response-value
 371    (elmo-imap4-read-untagged
 372     (elmo-network-session-process-internal session))
 373    'continue-req))
 374
 375 (defun elmo-imap4-process-bye (session)
 376   (with-current-buffer (elmo-network-session-buffer session)
 377     (let ((r elmo-imap4-current-response))
 378       (setq elmo-imap4-current-response nil)
 379       (elmo-network-close-session session)
 380       (signal 'elmo-imap4-bye-error
 381               (list (concat (elmo-imap4-response-error-text r))
 382                     "Try Again")))))
 383
 384 (defun elmo-imap4-accept-continue-req (session)
 385   "Returns non-nil if `+' (continue-req) response is arrived in SESSION.
 386 If response is not `+' response, cause an error."
 387   (let (response)
 388     (setq response
 389           (elmo-imap4-read-untagged
 390            (elmo-network-session-process-internal session)))
 391     (or (elmo-imap4-response-continue-req-p response)
 392         (error "IMAP error: %s"
 393                (or (elmo-imap4-response-error-text response)
 394                    "No continut-req from server.")))))
 395
 396 (defun elmo-imap4-read-ok (session tag)
 397   "Returns non-nil if `OK' response of the command with TAG is arrived
 398 in SESSION. If response is not `OK' response, returns nil."
 399   (elmo-imap4-response-ok-p
 400    (elmo-imap4-read-response session tag)))
 401
 402 (defun elmo-imap4-accept-ok (session tag)
 403   "Accept only `OK' response from SESSION.
 404 If response is not `OK' response, causes error with IMAP response text."
 405   (let ((response (elmo-imap4-read-response session tag)))
 406     (if (elmo-imap4-response-ok-p response)
 407         response
 408       (if (elmo-imap4-response-bye-p response)
 409           (elmo-imap4-process-bye session)
 410         (error "IMAP error: %s"
 411                (or (elmo-imap4-response-error-text response)
 412                    "No `OK' response from server."))))))
 413
 414 ;;; MIME-ELMO-IMAP Location
 415 (luna-define-method mime-imap-location-section-body ((location
 416                                                       mime-elmo-imap-location)
 417                                                      section)
 418   (if (and (stringp section)
 419            (string= section "HEADER"))
 420       ;; Even in the section mode, header fields should be saved to the
 421       ;; raw buffer .
 422       (with-current-buffer (mime-elmo-imap-location-rawbuf-internal location)
 423         (erase-buffer)
 424         (elmo-message-fetch
 425          (mime-elmo-imap-location-folder-internal location)
 426          (mime-elmo-imap-location-number-internal location)
 427          (mime-elmo-imap-location-strategy-internal location)
 428          section
 429          (current-buffer)
 430          'unseen)
 431         (buffer-string))
 432     (elmo-message-fetch
 433      (mime-elmo-imap-location-folder-internal location)
 434      (mime-elmo-imap-location-number-internal location)
 435      (mime-elmo-imap-location-strategy-internal location)
 436      section
 437      nil 'unseen)))
 438
 439
 440 (luna-define-method mime-imap-location-bodystructure
 441   ((location mime-elmo-imap-location))
 442   (elmo-imap4-fetch-bodystructure
 443    (mime-elmo-imap-location-folder-internal location)
 444    (mime-elmo-imap-location-number-internal location)
 445    (mime-elmo-imap-location-strategy-internal location)))
 446
 447 (luna-define-method mime-imap-location-fetch-entity-p
 448   ((location mime-elmo-imap-location) entity)
 449   (or (not elmo-message-displaying) ; Fetching entity to save or force display.
 450       ;; cache exists
 451       (file-exists-p
 452        (expand-file-name
 453         (mmimap-entity-section (mime-entity-node-id-internal entity))
 454         (elmo-fetch-strategy-cache-path
 455          (mime-elmo-imap-location-strategy-internal location))))
 456       ;; not too large to fetch.
 457       (> elmo-message-fetch-threshold
 458          (or (mime-imap-entity-size-internal entity) 0))))
 459
 460 ;;;
 461
 462 (defun elmo-imap4-session-check (session)
 463   (with-current-buffer (elmo-network-session-buffer session)
 464     (setq elmo-imap4-fetch-callback nil)
 465     (setq elmo-imap4-fetch-callback-data nil))
 466   (elmo-imap4-send-command-wait session "check"))
 467
 468 (defun elmo-imap4-atom-p (string)
 469   "Return t if STRING is an atom defined in rfc2060."
 470   (if (string= string "")
 471       nil
 472     (save-match-data
 473       (not (string-match elmo-imap4-non-atom-char-regex string)))))
 474
 475 (defun elmo-imap4-quotable-p (string)
 476   "Return t if STRING can be formatted as a quoted defined in rfc2060."
 477   (save-match-data
 478     (not (string-match elmo-imap4-non-text-char-regex string))))
 479
 480 (defun elmo-imap4-nil (string)
 481   "Return a list represents the special atom \"NIL\" defined in rfc2060, \
 482 if STRING is nil.
 483 Otherwise return nil."
 484   (if (eq string nil)
 485       (list 'atom "NIL")))
 486
 487 (defun elmo-imap4-atom (string)
 488   "Return a list represents STRING as an atom defined in rfc2060.
 489 Return nil if STRING is not an atom.  See `elmo-imap4-atom-p'."
 490   (if (elmo-imap4-atom-p string)
 491       (list 'atom string)))
 492
 493 (defun elmo-imap4-quoted (string)
 494   "Return a list represents STRING as a quoted defined in rfc2060.
 495 Return nil if STRING can not be formatted as a quoted.  See `elmo-imap4-quotable-p'."
 496   (if (elmo-imap4-quotable-p string)
 497       (list 'quoted string)))
 498
 499 (defun elmo-imap4-literal-1 (string-or-buffer length)
 500   "Internal function for `elmo-imap4-literal' and `elmo-imap4-buffer-literal'.
 501 Return a list represents STRING-OR-BUFFER as a literal defined in rfc2060.
 502 STRING-OR-BUFFER must be an encoded string or a single-byte string or a single-byte buffer.
 503 LENGTH must be the number of octets for STRING-OR-BUFFER."
 504   (list 'literal string-or-buffer length))
 505
 506 (defun elmo-imap4-literal (string)
 507   "Return a list represents STRING as a literal defined in rfc2060.
 508 STRING must be an encoded or a single-byte string."
 509   (elmo-imap4-literal-1 string (length string)))
 510
 511 (defun elmo-imap4-buffer-literal (buffer)
 512   "Return a list represents BUFFER as a literal defined in rfc2060.
 513 BUFFER must be a single-byte buffer."
 514   (elmo-imap4-literal-1 buffer (with-current-buffer buffer
 515                                  (buffer-size))))
 516
 517 (defun elmo-imap4-string-1 (string length)
 518   "Internal function for `elmo-imap4-string' and `elmo-imap4-buffer-string'.
 519 Return a list represents STRING as a string defined in rfc2060.
 520 STRING must be an encoded or a single-byte string.
 521 LENGTH must be the number of octets for STRING."
 522   (or (elmo-imap4-quoted string)
 523       (elmo-imap4-literal-1 string length)))
 524
 525 (defun elmo-imap4-string (string)
 526   "Return a list represents STRING as a string defined in rfc2060.
 527 STRING must be an encoded or a single-byte string."
 528   (let ((length (length string)))
 529     (if (< elmo-imap4-literal-threshold length)
 530         (elmo-imap4-literal-1 string length)
 531       (elmo-imap4-string-1 string length))))
 532
 533 (defun elmo-imap4-buffer-string (buffer)
 534   "Return a list represents BUFFER as a string defined in rfc2060.
 535 BUFFER must be a single-byte buffer."
 536   (let ((length (with-current-buffer buffer
 537                   (buffer-size))))
 538     (if (< elmo-imap4-literal-threshold length)
 539         (elmo-imap4-literal-1 buffer length)
 540       (elmo-imap4-string-1 (with-current-buffer buffer
 541                              (buffer-string))
 542                            length))))
 543
 544 (defun elmo-imap4-astring-1 (string length)
 545   "Internal function for `elmo-imap4-astring' and `elmo-imap4-buffer-astring'.
 546 Return a list represents STRING as an astring defined in rfc2060.
 547 STRING must be an encoded or a single-byte string.
 548 LENGTH must be the number of octets for STRING."
 549   (or (elmo-imap4-atom string)
 550       (elmo-imap4-string-1 string length)))
 551
 552 (defun elmo-imap4-astring (string)
 553   "Return a list represents STRING as an astring defined in rfc2060.
 554 STRING must be an encoded or a single-byte string."
 555   (let ((length (length string)))
 556     (if (< elmo-imap4-literal-threshold length)
 557         (elmo-imap4-literal-1 string length)
 558       (elmo-imap4-astring-1 string length))))
 559
 560 (defun elmo-imap4-buffer-astring (buffer)
 561   "Return a list represents BUFFER as an astring defined in rfc2060.
 562 BUFFER must be a single-byte buffer."
 563   (let ((length (with-current-buffer buffer
 564                   (buffer-size))))
 565     (if (< elmo-imap4-literal-threshold length)
 566         (elmo-imap4-literal-1 buffer length)
 567       (elmo-imap4-astring-1 (with-current-buffer buffer
 568                               (buffer-string))
 569                             length))))
 570
 571 (defun elmo-imap4-nstring (string)
 572   "Return a list represents STRING as a nstring defined in rfc2060.
 573 STRING must be an encoded or a single-byte string."
 574    (or (elmo-imap4-nil string)
 575        (elmo-imap4-string string)))
 576
 577 (defun elmo-imap4-buffer-nstring (buffer)
 578   "Return a list represents BUFFER as a nstring defined in rfc2060.
 579 BUFFER must be a single-byte buffer."
 580    (or (elmo-imap4-nil buffer)
 581        (elmo-imap4-buffer-string buffer)))
 582
 583 (defalias 'elmo-imap4-mailbox 'elmo-imap4-astring)
 584 (defalias 'elmo-imap4-field-body 'elmo-imap4-astring)
 585 (defalias 'elmo-imap4-userid 'elmo-imap4-astring)
 586 (defalias 'elmo-imap4-password 'elmo-imap4-astring)
 587
 588 (defun elmo-imap4-format-quoted (string)
 589   "Return STRING in a form of the quoted-string defined in rfc2060."
 590   (concat "\""
 591           (std11-wrap-as-quoted-pairs string elmo-imap4-quoted-specials-list)
 592           "\""))
 593
 594 (defsubst elmo-imap4-response-get-selectable-mailbox-list (response)
 595   (delq nil
 596         (mapcar
 597          (lambda (entry)
 598            (if (and (eq 'list (car entry))
 599                     (not (member "\\NoSelect" (nth 1 (nth 1 entry)))))
 600                (car (nth 1 entry))))
 601          response)))
 602
 603 (defun elmo-imap4-fetch-bodystructure (folder number strategy)
 604   "Fetch BODYSTRUCTURE for the message in the FOLDER with NUMBER using STRATEGY."
 605   (if (elmo-fetch-strategy-use-cache strategy)
 606       (elmo-object-load
 607        (elmo-file-cache-expand-path
 608         (elmo-fetch-strategy-cache-path strategy)
 609         "bodystructure"))
 610     (let ((session (elmo-imap4-get-session folder))
 611           bodystructure)
 612       (elmo-imap4-session-select-mailbox
 613        session
 614        (elmo-imap4-folder-mailbox-internal folder))
 615       (with-current-buffer (elmo-network-session-buffer session)
 616         (setq elmo-imap4-fetch-callback nil)
 617         (setq elmo-imap4-fetch-callback-data nil))
 618       (prog1 (setq bodystructure
 619                    (elmo-imap4-response-value
 620                     (elmo-imap4-response-value
 621                      (elmo-imap4-send-command-wait
 622                       session
 623                       (format
 624                        (if elmo-imap4-use-uid
 625                            "uid fetch %s bodystructure"
 626                          "fetch %s bodystructure")
 627                        number))
 628                      'fetch)
 629                     'bodystructure))
 630         (when (elmo-fetch-strategy-save-cache strategy)
 631           (elmo-file-cache-delete
 632            (elmo-fetch-strategy-cache-path strategy))
 633           (elmo-object-save
 634            (elmo-file-cache-expand-path
 635             (elmo-fetch-strategy-cache-path strategy)
 636             "bodystructure")
 637            bodystructure))))))
 638
 639 ;;; Backend methods.
 640 (luna-define-method elmo-create-folder-plugged ((folder elmo-imap4-folder))
 641   (elmo-imap4-send-command-wait
 642    (elmo-imap4-get-session folder)
 643    (list "create " (elmo-imap4-mailbox
 644                     (elmo-imap4-folder-mailbox-internal folder)))))
 645
 646 (defun elmo-imap4-get-session (folder &optional if-exists)
 647   (elmo-network-get-session 'elmo-imap4-session
 648                             (concat
 649                              (if (elmo-folder-biff-internal folder)
 650                                  "BIFF-")
 651                              "IMAP")
 652                             folder if-exists))
 653
 654 (defun elmo-imap4-session-select-mailbox (session mailbox
 655                                                   &optional force no-error)
 656   "Select MAILBOX in SESSION.
 657 If optional argument FORCE is non-nil, select mailbox even if current mailbox
 658 is same as MAILBOX.
 659 If second optional argument NO-ERROR is non-nil, don't cause an error when
 660 selecting folder was failed.
 661 If NO-ERROR is 'notify-bye, only BYE response is reported as error.
 662 Returns response value if selecting folder succeed. "
 663   (when (or force
 664             (not (string=
 665                   (elmo-imap4-session-current-mailbox-internal session)
 666                   mailbox)))
 667     (let (response result)
 668       (unwind-protect
 669           (setq response
 670                 (elmo-imap4-read-response
 671                  session
 672                  (elmo-imap4-send-command
 673                   session
 674                   (list
 675                    "select "
 676                    (elmo-imap4-mailbox mailbox)))))
 677         (if (setq result (elmo-imap4-response-ok-p response))
 678             (progn
 679               (elmo-imap4-session-set-current-mailbox-internal session mailbox)
 680               (elmo-imap4-session-set-read-only-internal
 681                session
 682                (nth 1 (assq 'read-only (assq 'ok response)))))
 683           (elmo-imap4-session-set-current-mailbox-internal session nil)
 684           (if (and (eq no-error 'notify-bye)
 685                    (elmo-imap4-response-bye-p response))
 686               (elmo-imap4-process-bye session)
 687             (unless no-error
 688               (error (or
 689                       (elmo-imap4-response-error-text response)
 690                       (format "Select %s failed" mailbox)))))))
 691       (and result response))))
 692
 693 (defun elmo-imap4-check-validity (spec validity-file)
 694 ;;; Not used.
 695 ;;;(elmo-imap4-send-command-wait
 696 ;;;(elmo-imap4-get-session spec)
 697 ;;;(list "status "
 698 ;;;      (elmo-imap4-mailbox
 699 ;;;       (elmo-imap4-spec-mailbox spec))
 700 ;;;      " (uidvalidity)")))
 701   )
 702
 703 (defun elmo-imap4-sync-validity  (spec validity-file)
 704   ;; Not used.
 705   )
 706
 707 (defun elmo-imap4-list (folder flag)
 708   (let ((session (elmo-imap4-get-session folder)))
 709     (elmo-imap4-session-select-mailbox
 710      session
 711      (elmo-imap4-folder-mailbox-internal folder))
 712     (elmo-imap4-response-value
 713      (elmo-imap4-send-command-wait
 714       session
 715       (format (if elmo-imap4-use-uid "uid search %s"
 716                 "search %s") flag))
 717      'search)))
 718
 719 (static-cond
 720  ((fboundp 'float)
 721   ;; Emacs can parse dot symbol.
 722   (defvar elmo-imap4-rfc822-size "RFC822\.SIZE")
 723   (defvar elmo-imap4-rfc822-text "RFC822\.TEXT")
 724   (defvar elmo-imap4-rfc822-header "RFC822\.HEADER")
 725   (defvar elmo-imap4-rfc822-size "RFC822\.SIZE")
 726   (defvar elmo-imap4-header-fields "HEADER\.FIELDS")
 727   (defmacro elmo-imap4-replace-dot-symbols ()) ;; noop
 728   (defalias 'elmo-imap4-fetch-read 'read)
 729   )
 730  (t
 731   ;;; For Nemacs.
 732   ;; Cannot parse dot symbol.
 733   (defvar elmo-imap4-rfc822-size "RFC822_SIZE")
 734   (defvar elmo-imap4-header-fields "HEADER_FIELDS")
 735   (defvar elmo-imap4-rfc822-size "RFC822_SIZE")
 736   (defvar elmo-imap4-rfc822-text "RFC822_TEXT")
 737   (defvar elmo-imap4-rfc822-header "RFC822_HEADER")
 738   (defvar elmo-imap4-header-fields "HEADER_FIELDS")
 739   (defun elmo-imap4-fetch-read (buffer)
 740     (with-current-buffer buffer
 741       (let ((beg (point))
 742             token)
 743         (when (re-search-forward "[[ ]" nil t)
 744           (goto-char (match-beginning 0))
 745           (setq token (buffer-substring beg (point)))
 746           (cond ((string= token "RFC822.SIZE")
 747                  (intern elmo-imap4-rfc822-size))
 748                 ((string= token "RFC822.HEADER")
 749                  (intern elmo-imap4-rfc822-header))
 750                 ((string= token "RFC822.TEXT")
 751                  (intern elmo-imap4-rfc822-text))
 752                 ((string= token "HEADER\.FIELDS")
 753                  (intern elmo-imap4-header-fields))
 754                 (t (goto-char beg)
 755                    (elmo-read (current-buffer))))))))))
 756
 757 (defun elmo-imap4-make-number-set-list (msg-list &optional chop-length)
 758   "Make RFC2060's message set specifier from MSG-LIST.
 759 Returns a list of (NUMBER . SET-STRING).
 760 SET-STRING is the message set specifier described in RFC2060.
 761 NUMBER is contained message number in SET-STRING.
 762 Every SET-STRING does not contain number of messages longer than CHOP-LENGTH.
 763 If CHOP-LENGTH is not specified, message set is not chopped."
 764   (let (count cont-list set-list)
 765     (setq msg-list (sort (copy-sequence msg-list) '<))
 766     (while msg-list
 767       (setq cont-list nil)
 768       (setq count 0)
 769       (unless chop-length
 770         (setq chop-length (length msg-list)))
 771       (while (and (not (null msg-list))
 772                   (< count chop-length))
 773         (setq cont-list
 774               (elmo-number-set-append
 775                cont-list (car msg-list)))
 776         (incf count)
 777         (setq msg-list (cdr msg-list)))
 778       (setq set-list
 779             (cons
 780              (cons
 781               count
 782               (mapconcat
 783                (lambda (x)
 784                  (cond ((consp x)
 785                         (format "%s:%s" (car x) (cdr x)))
 786                        ((integerp x)
 787                         (int-to-string x))))
 788                cont-list
 789                ","))
 790              set-list)))
 791     (nreverse set-list)))
 792
 793 ;;
 794 ;; app-data:
 795 ;; cons of seen-list and result of use-flag-p.
 796 (defsubst elmo-imap4-fetch-callback-1-subr (entity flags app-data)
 797   "A msgdb entity callback function."
 798   (let* ((use-flag (cdr app-data))
 799          (app-data (car app-data))
 800          (seen (member (car entity) app-data))
 801          mark)
 802     (if (member "\\Flagged" flags)
 803         (elmo-msgdb-global-mark-set (car entity)
 804                                     elmo-msgdb-important-mark))
 805     (if (setq mark (elmo-msgdb-global-mark-get (car entity)))
 806         (unless (member "\\Seen" flags)
 807           (setq elmo-imap4-seen-messages
 808                 (cons
 809                  (elmo-msgdb-overview-entity-get-number entity)
 810                  elmo-imap4-seen-messages)))
 811       (setq mark (or (if (elmo-file-cache-status
 812                           (elmo-file-cache-get (car entity)))
 813                          ;; cached.
 814                          (if (member "\\Answered" flags)
 815                              elmo-msgdb-answered-cached-mark
 816                            (if (or seen
 817                                    (and use-flag
 818                                         (member "\\Seen" flags)))
 819                                nil
 820                              elmo-msgdb-unread-cached-mark))
 821                        (if (member "\\Answered" flags)
 822                            elmo-msgdb-answered-uncached-mark
 823                          (if (or seen
 824                                  (and use-flag
 825                                       (member "\\Seen" flags)))
 826                              (if elmo-imap4-use-cache
 827                                  elmo-msgdb-read-uncached-mark)
 828                            elmo-msgdb-new-mark))))))
 829     (setq elmo-imap4-current-msgdb
 830           (elmo-msgdb-append
 831            elmo-imap4-current-msgdb
 832            (list (list entity)
 833                  (list (cons (elmo-msgdb-overview-entity-get-number entity)
 834                              (car entity)))
 835                  (if mark
 836                      (list
 837                       (list (elmo-msgdb-overview-entity-get-number entity)
 838                             mark))))))))
 839
 840 ;; Current buffer is process buffer.
 841 (defun elmo-imap4-fetch-callback-1 (element app-data)
 842   (elmo-imap4-fetch-callback-1-subr
 843    (with-temp-buffer
 844      (insert (or (elmo-imap4-response-bodydetail-text element)
 845                  ""))
 846      ;; Delete CR.
 847      (goto-char (point-min))
 848      (while (search-forward "\r\n" nil t)
 849        (replace-match "\n"))
 850      (elmo-msgdb-create-overview-from-buffer
 851       (elmo-imap4-response-value element 'uid)
 852       (elmo-imap4-response-value element 'rfc822size)))
 853    (elmo-imap4-response-value element 'flags)
 854    app-data))
 855
 856 (defun elmo-imap4-parse-capability (string)
 857   (if (string-match "^\\*\\(.*\\)$" string)
 858       (elmo-read
 859        (concat "(" (downcase (elmo-match-string 1 string)) ")"))))
 860
 861 (defun elmo-imap4-clear-login (session)
 862   (let ((elmo-imap4-debug-inhibit-logging t))
 863     (or
 864      (elmo-imap4-read-ok
 865       session
 866       (elmo-imap4-send-command
 867        session
 868        (list "login "
 869              (elmo-imap4-userid (elmo-network-session-user-internal session))
 870              " "
 871              (elmo-imap4-password
 872               (elmo-get-passwd (elmo-network-session-password-key session))))))
 873      (signal 'elmo-authenticate-error '(elmo-imap4-clear-login)))))
 874
 875 (defun elmo-imap4-auth-login (session)
 876   (let ((tag (elmo-imap4-send-command session "authenticate login"))
 877         (elmo-imap4-debug-inhibit-logging t))
 878     (or (elmo-imap4-read-continue-req session)
 879         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
 880     (elmo-imap4-send-string session
 881                             (elmo-base64-encode-string
 882                              (elmo-network-session-user-internal session)))
 883     (or (elmo-imap4-read-continue-req session)
 884         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
 885     (elmo-imap4-send-string session
 886                             (elmo-base64-encode-string
 887                              (elmo-get-passwd
 888                               (elmo-network-session-password-key session))))
 889     (or (elmo-imap4-read-ok session tag)
 890         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
 891     (setq elmo-imap4-status 'auth)))
 892
 893 (luna-define-method
 894   elmo-network-initialize-session-buffer :after ((session
 895                                                   elmo-imap4-session) buffer)
 896   (with-current-buffer buffer
 897     (mapcar 'make-variable-buffer-local elmo-imap4-local-variables)
 898     (setq elmo-imap4-seqno 0)
 899     (setq elmo-imap4-status 'initial)))
 900
 901 (luna-define-method elmo-network-initialize-session ((session
 902                                                       elmo-imap4-session))
 903   (let ((process (elmo-network-session-process-internal session)))
 904     (with-current-buffer (process-buffer process)
 905       ;; Skip garbage output from process before greeting.
 906       (while (and (memq (process-status process) '(open run))
 907                   (goto-char (point-max))
 908                   (forward-line -1)
 909                   (not (elmo-imap4-parse-greeting)))
 910         (accept-process-output process 1))
 911       (set-process-filter process 'elmo-imap4-arrival-filter)
 912       (set-process-sentinel process 'elmo-imap4-sentinel)
 913 ;;;   (while (and (memq (process-status process) '(open run))
 914 ;;;               (eq elmo-imap4-status 'initial))
 915 ;;;     (message "Waiting for server response...")
 916 ;;;     (accept-process-output process 1))
 917 ;;;   (message "")
 918       (unless (memq elmo-imap4-status '(nonauth auth))
 919         (signal 'elmo-open-error
 920                 (list 'elmo-network-initialize-session)))
 921       (elmo-imap4-session-set-capability-internal
 922        session
 923        (elmo-imap4-response-value
 924         (elmo-imap4-send-command-wait session "capability")
 925         'capability))
 926       (when (eq (elmo-network-stream-type-symbol
 927                  (elmo-network-session-stream-type-internal session))
 928                 'starttls)
 929         (or (memq 'starttls
 930                   (elmo-imap4-session-capability-internal session))
 931             (signal 'elmo-open-error
 932                     '(elmo-imap4-starttls-error)))
 933         (elmo-imap4-send-command-wait session "starttls")
 934         (starttls-negotiate process)
 935         (elmo-imap4-session-set-capability-internal
 936          session
 937          (elmo-imap4-response-value
 938           (elmo-imap4-send-command-wait session "capability")
 939           'capability))))))
 940
 941 (luna-define-method elmo-network-authenticate-session ((session
 942                                                         elmo-imap4-session))
 943   (with-current-buffer (process-buffer
 944                         (elmo-network-session-process-internal session))
 945     (let* ((auth (elmo-network-session-auth-internal session))
 946            (auth (if (listp auth) auth (list auth))))
 947       (unless (or (eq elmo-imap4-status 'auth)
 948                   (null auth))
 949         (cond
 950          ((eq 'clear (car auth))
 951           (elmo-imap4-clear-login session))
 952          ((eq 'login (car auth))
 953           (elmo-imap4-auth-login session))
 954          (t
 955           (let* ((elmo-imap4-debug-inhibit-logging t)
 956                  (sasl-mechanisms
 957                   (delq nil
 958                         (mapcar
 959                          '(lambda (cap)
 960                             (if (string-match "^auth=\\(.*\\)$"
 961                                               (symbol-name cap))
 962                                 (match-string 1 (upcase (symbol-name cap)))))
 963                          (elmo-imap4-session-capability-internal session))))
 964                  (mechanism
 965                   (sasl-find-mechanism
 966                    (delq nil
 967                          (mapcar '(lambda (cap) (upcase (symbol-name cap)))
 968                                  (if (listp auth)
 969                                      auth
 970                                    (list auth)))))) ;)
 971                  client name step response tag
 972                  sasl-read-passphrase)
 973             (unless mechanism
 974               (if (or elmo-imap4-force-login
 975                       (y-or-n-p
 976                        (format
 977                         "There's no %s capability in server. continue?"
 978                         (elmo-list-to-string
 979                          (elmo-network-session-auth-internal session)))))
 980                   (setq mechanism (sasl-find-mechanism
 981                                    sasl-mechanisms))
 982                 (signal 'elmo-authenticate-error
 983                         '(elmo-imap4-auth-no-mechanisms))))
 984             (setq client
 985                   (sasl-make-client
 986                    mechanism
 987                    (elmo-network-session-user-internal session)
 988                    "imap"
 989                    (elmo-network-session-server-internal session)))
 990 ;;;         (if elmo-imap4-auth-user-realm
 991 ;;;             (sasl-client-set-property client 'realm elmo-imap4-auth-user-realm))
 992             (setq name (sasl-mechanism-name mechanism)
 993                   step (sasl-next-step client nil))
 994             (elmo-network-session-set-auth-internal
 995              session
 996              (intern (downcase name)))
 997             (setq sasl-read-passphrase
 998                   (function
 999                    (lambda (prompt)
1000                      (elmo-get-passwd
1001                       (elmo-network-session-password-key session)))))
1002             (setq tag
1003                   (elmo-imap4-send-command
1004                    session
1005                    (concat "AUTHENTICATE " name
1006                            (and (sasl-step-data step)
1007                                 (concat
1008                                  " "
1009                                  (elmo-base64-encode-string
1010                                   (sasl-step-data step)
1011                                   'no-lin-break))))))
1012             (catch 'done
1013               (while t
1014                 (setq response
1015                       (elmo-imap4-read-untagged
1016                        (elmo-network-session-process-internal session)))
1017                 (if (elmo-imap4-response-ok-p response)
1018                     (if (sasl-next-step client step)
1019                         ;; Bogus server?
1020                         (signal 'elmo-authenticate-error
1021                                 (list (intern
1022                                        (concat "elmo-imap4-auth-"
1023                                                (downcase name)))))
1024                       ;; The authentication process is finished.
1025                       (throw 'done nil)))
1026                 (unless (elmo-imap4-response-continue-req-p response)
1027                   ;; response is NO or BAD.
1028                   (signal 'elmo-authenticate-error
1029                           (list (intern
1030                                  (concat "elmo-imap4-auth-"
1031                                          (downcase name))))))
1032                 (sasl-step-set-data
1033                  step
1034                  (elmo-base64-decode-string
1035                   (elmo-imap4-response-value response 'continue-req)))
1036                 (setq step (sasl-next-step client step))
1037                 (setq tag
1038                       (elmo-imap4-send-string
1039                        session
1040                        (if (sasl-step-data step)
1041                            (elmo-base64-encode-string (sasl-step-data step)
1042                                                       'no-line-break)
1043                          ""))))))))))))
1044
1045 (luna-define-method elmo-network-setup-session ((session
1046                                                  elmo-imap4-session))
1047   (with-current-buffer (elmo-network-session-buffer session)
1048     (when (memq 'namespace (elmo-imap4-session-capability-internal session))
1049       (setq elmo-imap4-server-namespace
1050             (elmo-imap4-response-value
1051              (elmo-imap4-send-command-wait session "namespace")
1052              'namespace)))))
1053
1054 (defun elmo-imap4-setup-send-buffer (&optional string)
1055   (let ((send-buf (get-buffer-create " *elmo-imap4-setup-send-buffer*"))
1056         (source-buf (unless string (current-buffer))))
1057     (save-excursion
1058       (save-match-data
1059         (set-buffer send-buf)
1060         (erase-buffer)
1061         (elmo-set-buffer-multibyte nil)
1062         (if string
1063             (insert string)
1064           (with-current-buffer source-buf
1065             (copy-to-buffer send-buf (point-min) (point-max))))
1066         (goto-char (point-min))
1067         (if (eq (re-search-forward "^$" nil t)
1068                 (point-max))
1069             (insert "\n"))
1070         (goto-char (point-min))
1071         (while (search-forward "\n" nil t)
1072           (replace-match "\r\n"))))
1073     send-buf))
1074
1075 (defun elmo-imap4-setup-send-buffer-from-file (file)
1076   (let ((tmp-buf (get-buffer-create
1077                   " *elmo-imap4-setup-send-buffer-from-file*")))
1078     (save-excursion
1079       (save-match-data
1080         (set-buffer tmp-buf)
1081         (erase-buffer)
1082         (as-binary-input-file
1083          (insert-file-contents file))
1084         (goto-char (point-min))
1085         (if (eq (re-search-forward "^$" nil t)
1086                 (point-max))
1087             (insert "\n"))
1088         (goto-char (point-min))
1089         (while (search-forward "\n" nil t)
1090           (replace-match "\r\n"))))
1091     tmp-buf))
1092
1093 (luna-define-method elmo-delete-message-safe ((folder elmo-imap4-folder)
1094                                               number msgid)
1095   (let ((session (elmo-imap4-get-session folder))
1096         candidates)
1097     (elmo-imap4-session-select-mailbox
1098      session
1099      (elmo-imap4-folder-mailbox-internal folder))
1100     (setq candidates
1101           (elmo-imap4-response-value
1102            (elmo-imap4-send-command-wait session
1103                                          (list
1104                                           (if elmo-imap4-use-uid
1105                                               "uid search header message-id "
1106                                             "search header message-id ")
1107                                           (elmo-imap4-field-body msgid)))
1108            'search))
1109     (if (memq number candidates)
1110         (elmo-folder-delete-messages folder (list number)))))
1111
1112 (defun elmo-imap4-server-diff-async-callback-1 (status data)
1113   (funcall elmo-imap4-server-diff-async-callback
1114            (list (elmo-imap4-response-value status 'recent)
1115                  (elmo-imap4-response-value status 'unseen)
1116                  (elmo-imap4-response-value status 'messages))
1117            data))
1118
1119 (defun elmo-imap4-server-diff-async (folder)
1120   (let ((session (elmo-imap4-get-session folder)))
1121     ;; We should `check' folder to obtain newest information here.
1122     ;; But since there's no asynchronous check mechanism in elmo yet,
1123     ;; checking is not done here.
1124     (with-current-buffer (elmo-network-session-buffer session)
1125       (setq elmo-imap4-status-callback
1126             'elmo-imap4-server-diff-async-callback-1)
1127       (setq elmo-imap4-status-callback-data
1128             elmo-imap4-server-diff-async-callback-data))
1129     (elmo-imap4-send-command session
1130                              (list
1131                               "status "
1132                               (elmo-imap4-mailbox
1133                                (elmo-imap4-folder-mailbox-internal folder))
1134                               " (recent unseen messages)"))))
1135
1136 (luna-define-method elmo-server-diff-async ((folder elmo-imap4-folder))
1137   (let ((session (elmo-imap4-get-session folder)))
1138     ;; commit.
1139     ;; (elmo-imap4-commit spec)
1140     (with-current-buffer (elmo-network-session-buffer session)
1141       (setq elmo-imap4-status-callback
1142             'elmo-imap4-server-diff-async-callback-1)
1143       (setq elmo-imap4-status-callback-data
1144             elmo-imap4-server-diff-async-callback-data))
1145     (elmo-imap4-send-command session
1146                              (list
1147                               "status "
1148                               (elmo-imap4-mailbox
1149                                (elmo-imap4-folder-mailbox-internal folder))
1150                               " (recent unseen messages)"))))
1151
1152 ;;; IMAP parser.
1153
1154 (defvar elmo-imap4-server-eol "\r\n"
1155   "The EOL string sent from the server.")
1156
1157 (defvar elmo-imap4-client-eol "\r\n"
1158   "The EOL string we send to the server.")
1159
1160 (defvar elmo-imap4-display-literal-progress nil)
1161
1162 (defun elmo-imap4-find-next-line ()
1163   "Return point at end of current line, taking into account literals.
1164 Return nil if no complete line has arrived."
1165   (when (re-search-forward (concat elmo-imap4-server-eol "\\|{\\([0-9]+\\)}"
1166                                    elmo-imap4-server-eol)
1167                            nil t)
1168     (if (match-string 1)
1169         (if (< (point-max) (+ (point) (string-to-number (match-string 1))))
1170             (progn
1171               (if (and elmo-imap4-display-literal-progress
1172                        (> (string-to-number (match-string 1))
1173                           (min elmo-display-retrieval-progress-threshold 100)))
1174                   (elmo-display-progress
1175                    'elmo-imap4-display-literal-progress
1176                    (format "Retrieving (%d/%d bytes)..."
1177                            (- (point-max) (point))
1178                            (string-to-number (match-string 1)))
1179                    (/ (- (point-max) (point))
1180                       (/ (string-to-number (match-string 1)) 100))))
1181               nil)
1182           (goto-char (+ (point) (string-to-number (match-string 1))))
1183           (elmo-imap4-find-next-line))
1184       (point))))
1185
1186 (defun elmo-imap4-sentinel (process string)
1187   (delete-process process))
1188
1189 (defun elmo-imap4-arrival-filter (proc string)
1190   "IMAP process filter."
1191   (when (buffer-live-p (process-buffer proc))
1192   (with-current-buffer (process-buffer proc)
1193     (elmo-imap4-debug "-> %s" string)
1194     (goto-char (point-max))
1195     (insert string)
1196     (let (end)
1197       (goto-char (point-min))
1198       (while (setq end (elmo-imap4-find-next-line))
1199         (save-restriction
1200           (narrow-to-region (point-min) end)
1201           (delete-backward-char (length elmo-imap4-server-eol))
1202           (goto-char (point-min))
1203           (unwind-protect
1204               (cond ((eq elmo-imap4-status 'initial)
1205                      (setq elmo-imap4-current-response
1206                            (list
1207                             (list 'greeting (elmo-imap4-parse-greeting)))))
1208                     ((or (eq elmo-imap4-status 'auth)
1209                          (eq elmo-imap4-status 'nonauth)
1210                          (eq elmo-imap4-status 'selected)
1211                          (eq elmo-imap4-status 'examine))
1212                      (setq elmo-imap4-current-response
1213                            (cons
1214                             (elmo-imap4-parse-response)
1215                             elmo-imap4-current-response)))
1216                     (t
1217                      (message "Unknown state %s in arrival filter"
1218                               elmo-imap4-status))))
1219           (delete-region (point-min) (point-max))))))))
1220
1221 ;; IMAP parser.
1222
1223 (defsubst elmo-imap4-forward ()
1224   (or (eobp) (forward-char 1)))
1225
1226 (defsubst elmo-imap4-parse-number ()
1227   (when (looking-at "[0-9]+")
1228     (prog1
1229         (string-to-number (match-string 0))
1230       (goto-char (match-end 0)))))
1231
1232 (defsubst elmo-imap4-parse-literal ()
1233   (when (looking-at "{\\([0-9]+\\)}\r\n")
1234     (let ((pos (match-end 0))
1235           (len (string-to-number (match-string 1))))
1236       (if (< (point-max) (+ pos len))
1237           nil
1238         (goto-char (+ pos len))
1239         (buffer-substring pos (+ pos len))))))
1240 ;;;     (list ' pos (+ pos len))))))
1241
1242 (defsubst elmo-imap4-parse-string ()
1243   (cond ((eq (char-after (point)) ?\")
1244          (forward-char 1)
1245          (let ((p (point)) (name ""))
1246            (skip-chars-forward "^\"\\\\")
1247            (setq name (buffer-substring p (point)))
1248            (while (eq (char-after (point)) ?\\)
1249              (setq p (1+ (point)))
1250              (forward-char 2)
1251              (skip-chars-forward "^\"\\\\")
1252              (setq name (concat name (buffer-substring p (point)))))
1253            (forward-char 1)
1254            name))
1255         ((eq (char-after (point)) ?{)
1256          (elmo-imap4-parse-literal))))
1257
1258 (defsubst elmo-imap4-parse-nil ()
1259   (if (looking-at "NIL")
1260       (goto-char (match-end 0))))
1261
1262 (defsubst elmo-imap4-parse-nstring ()
1263   (or (elmo-imap4-parse-string)
1264       (and (elmo-imap4-parse-nil)
1265            nil)))
1266
1267 (defsubst elmo-imap4-parse-astring ()
1268   (or (elmo-imap4-parse-string)
1269       (buffer-substring (point)
1270                         (if (re-search-forward "[(){ \r\n%*\"\\]" nil t)
1271                             (goto-char (1- (match-end 0)))
1272                           (end-of-line)
1273                           (point)))))
1274
1275 (defsubst elmo-imap4-parse-address ()
1276   (let (address)
1277     (when (eq (char-after (point)) ?\()
1278       (elmo-imap4-forward)
1279       (setq address (vector (prog1 (elmo-imap4-parse-nstring)
1280                               (elmo-imap4-forward))
1281                             (prog1 (elmo-imap4-parse-nstring)
1282                               (elmo-imap4-forward))
1283                             (prog1 (elmo-imap4-parse-nstring)
1284                               (elmo-imap4-forward))
1285                             (elmo-imap4-parse-nstring)))
1286       (when (eq (char-after (point)) ?\))
1287         (elmo-imap4-forward)
1288         address))))
1289
1290 (defsubst elmo-imap4-parse-address-list ()
1291   (if (eq (char-after (point)) ?\()
1292       (let (address addresses)
1293         (elmo-imap4-forward)
1294         (while (and (not (eq (char-after (point)) ?\)))
1295                     ;; next line for MS Exchange bug
1296                     (progn (and (eq (char-after (point)) ? ) (elmo-imap4-forward)) t)
1297                     (setq address (elmo-imap4-parse-address)))
1298           (setq addresses (cons address addresses)))
1299         (when (eq (char-after (point)) ?\))
1300           (elmo-imap4-forward)
1301           (nreverse addresses)))
1302     (assert (elmo-imap4-parse-nil))))
1303
1304 (defsubst elmo-imap4-parse-mailbox ()
1305   (let ((mailbox (elmo-imap4-parse-astring)))
1306     (if (string-equal "INBOX" (upcase mailbox))
1307         "INBOX"
1308       mailbox)))
1309
1310 (defun elmo-imap4-parse-greeting ()
1311   "Parse a IMAP greeting."
1312   (cond ((looking-at "\\* OK ")
1313          (setq elmo-imap4-status 'nonauth))
1314         ((looking-at "\\* PREAUTH ")
1315          (setq elmo-imap4-status 'auth))
1316         ((looking-at "\\* BYE ")
1317          (setq elmo-imap4-status 'closed))))
1318
1319 (defun elmo-imap4-parse-response ()
1320   "Parse a IMAP command response."
1321   (let (token)
1322     (case (setq token (elmo-read (current-buffer)))
1323       (+ (progn
1324            (skip-chars-forward " ")
1325            (list 'continue-req (buffer-substring (point) (point-max)))))
1326       (* (case (prog1 (setq token (elmo-read (current-buffer)))
1327                  (elmo-imap4-forward))
1328            (OK         (elmo-imap4-parse-resp-text-code))
1329            (NO         (elmo-imap4-parse-resp-text-code))
1330            (BAD        (elmo-imap4-parse-resp-text-code))
1331            (BYE        (elmo-imap4-parse-bye))
1332            (FLAGS      (list 'flags
1333                              (elmo-imap4-parse-flag-list)))
1334            (LIST       (list 'list (elmo-imap4-parse-data-list)))
1335            (LSUB       (list 'lsub (elmo-imap4-parse-data-list)))
1336            (SEARCH     (list
1337                         'search
1338                         (elmo-read (concat "("
1339                                       (buffer-substring (point) (point-max))
1340                                       ")"))))
1341            (STATUS     (elmo-imap4-parse-status))
1342            ;; Added
1343            (NAMESPACE  (elmo-imap4-parse-namespace))
1344            (CAPABILITY (list 'capability
1345                              (elmo-read
1346                               (concat "(" (downcase (buffer-substring
1347                                                      (point) (point-max)))
1348                                       ")"))))
1349            (ACL (elmo-imap4-parse-acl))
1350            (t       (case (prog1 (elmo-read (current-buffer))
1351                             (elmo-imap4-forward))
1352                       (EXISTS  (list 'exists token))
1353                       (RECENT  (list 'recent token))
1354                       (EXPUNGE (list 'expunge token))
1355                       (FETCH   (elmo-imap4-parse-fetch token))
1356                       (t       (list 'garbage (buffer-string)))))))
1357       (t (if (not (string-match elmo-imap4-seq-prefix (symbol-name token)))
1358              (list 'garbage (buffer-string))
1359            (case (prog1 (elmo-read (current-buffer))
1360                    (elmo-imap4-forward))
1361              (OK  (progn
1362                     (setq elmo-imap4-parsing nil)
1363                     (setq token (symbol-name token))
1364                     (elmo-unintern token)
1365                     (elmo-imap4-debug "*%s* OK arrived" token)
1366                     (setq elmo-imap4-reached-tag token)
1367                     (list 'ok (elmo-imap4-parse-resp-text-code))))
1368              (NO  (progn
1369                     (setq elmo-imap4-parsing nil)
1370                     (setq token (symbol-name token))
1371                     (elmo-unintern token)
1372                     (elmo-imap4-debug "*%s* NO arrived" token)
1373                     (setq elmo-imap4-reached-tag token)
1374                     (let (code text)
1375                       (when (eq (char-after (point)) ?\[)
1376                         (setq code (buffer-substring (point)
1377                                                      (search-forward "]")))
1378                         (elmo-imap4-forward))
1379                       (setq text (buffer-substring (point) (point-max)))
1380                       (list 'no (list code text)))))
1381              (BAD (progn
1382                     (setq elmo-imap4-parsing nil)
1383                     (elmo-imap4-debug "*%s* BAD arrived" token)
1384                     (setq token (symbol-name token))
1385                     (elmo-unintern token)
1386                     (setq elmo-imap4-reached-tag token)
1387                     (let (code text)
1388                       (when (eq (char-after (point)) ?\[)
1389                         (setq code (buffer-substring (point)
1390                                                      (search-forward "]")))
1391                         (elmo-imap4-forward))
1392                       (setq text (buffer-substring (point) (point-max)))
1393                       (list 'bad (list code text)))))
1394              (t   (list 'garbage (buffer-string)))))))))
1395
1396 (defun elmo-imap4-parse-bye ()
1397   (let (code text)
1398     (when (eq (char-after (point)) ?\[)
1399       (setq code (buffer-substring (point)
1400                                    (search-forward "]")))
1401       (elmo-imap4-forward))
1402     (setq text (buffer-substring (point) (point-max)))
1403     (list 'bye (list code text))))
1404
1405 (defun elmo-imap4-parse-text ()
1406   (goto-char (point-min))
1407   (when (search-forward "[" nil t)
1408     (search-forward "]")
1409     (elmo-imap4-forward))
1410   (list 'text (buffer-substring (point) (point-max))))
1411
1412 (defun elmo-imap4-parse-resp-text-code ()
1413   (when (eq (char-after (point)) ?\[)
1414     (elmo-imap4-forward)
1415     (cond ((search-forward "PERMANENTFLAGS " nil t)
1416            (list 'permanentflags (elmo-imap4-parse-flag-list)))
1417           ((search-forward "UIDNEXT " nil t)
1418            (list 'uidnext (elmo-read (current-buffer))))
1419           ((search-forward "UNSEEN " nil t)
1420            (list 'unseen (elmo-read (current-buffer))))
1421           ((looking-at "UIDVALIDITY \\([0-9]+\\)")
1422            (list 'uidvalidity (match-string 1)))
1423           ((search-forward "READ-ONLY" nil t)
1424            (list 'read-only t))
1425           ((search-forward "READ-WRITE" nil t)
1426            (list 'read-write t))
1427           ((search-forward "NEWNAME " nil t)
1428            (let (oldname newname)
1429              (setq oldname (elmo-imap4-parse-string))
1430              (elmo-imap4-forward)
1431              (setq newname (elmo-imap4-parse-string))
1432              (list 'newname newname oldname)))
1433           ((search-forward "TRYCREATE" nil t)
1434            (list 'trycreate t))
1435           ((looking-at "APPENDUID \\([0-9]+\\) \\([0-9]+\\)")
1436            (list 'appenduid
1437                  (list (match-string 1)
1438                        (string-to-number (match-string 2)))))
1439           ((looking-at "COPYUID \\([0-9]+\\) \\([0-9,:]+\\) \\([0-9,:]+\\)")
1440            (list 'copyuid (list (match-string 1)
1441                                 (match-string 2)
1442                                 (match-string 3))))
1443           ((search-forward "ALERT] " nil t)
1444            (message "IMAP server information: %s"
1445                     (buffer-substring (point) (point-max))))
1446           (t (list 'unknown)))))
1447
1448 (defun elmo-imap4-parse-data-list ()
1449   (let (flags delimiter mailbox)
1450     (setq flags (elmo-imap4-parse-flag-list))
1451     (when (looking-at " NIL\\| \"\\\\?\\(.\\)\"")
1452       (setq delimiter (match-string 1))
1453       (goto-char (1+ (match-end 0)))
1454       (when (setq mailbox (elmo-imap4-parse-mailbox))
1455         (list mailbox flags delimiter)))))
1456
1457 (defsubst elmo-imap4-parse-header-list ()
1458   (when (eq (char-after (point)) ?\()
1459     (let (strlist)
1460       (while (not (eq (char-after (point)) ?\)))
1461         (elmo-imap4-forward)
1462         (push (elmo-imap4-parse-astring) strlist))
1463       (elmo-imap4-forward)
1464       (nreverse strlist))))
1465
1466 (defsubst elmo-imap4-parse-fetch-body-section ()
1467   (let ((section
1468          (buffer-substring (point)
1469                            (1-
1470                             (progn (re-search-forward "[] ]" nil t)
1471                                    (point))))))
1472     (if (eq (char-before) ? )
1473         (prog1
1474             (mapconcat 'identity
1475                        (cons section (elmo-imap4-parse-header-list)) " ")
1476           (search-forward "]" nil t))
1477       section)))
1478
1479 (defun elmo-imap4-parse-fetch (response)
1480   (when (eq (char-after (point)) ?\()
1481     (let (element list)
1482       (while (not (eq (char-after (point)) ?\)))
1483         (elmo-imap4-forward)
1484         (let ((token (elmo-imap4-fetch-read (current-buffer))))
1485           (elmo-imap4-forward)
1486           (setq element
1487                 (cond ((eq token 'UID)
1488                        (list 'uid (condition-case nil
1489                                       (elmo-read (current-buffer))
1490                                     (error nil))))
1491                       ((eq token 'FLAGS)
1492                        (list 'flags (elmo-imap4-parse-flag-list)))
1493                       ((eq token 'ENVELOPE)
1494                        (list 'envelope (elmo-imap4-parse-envelope)))
1495                       ((eq token 'INTERNALDATE)
1496                        (list 'internaldate (elmo-imap4-parse-string)))
1497                       ((eq token 'RFC822)
1498                        (list 'rfc822 (elmo-imap4-parse-nstring)))
1499                       ((eq token (intern elmo-imap4-rfc822-header))
1500                        (list 'rfc822header (elmo-imap4-parse-nstring)))
1501                       ((eq token (intern elmo-imap4-rfc822-text))
1502                        (list 'rfc822text (elmo-imap4-parse-nstring)))
1503                       ((eq token (intern elmo-imap4-rfc822-size))
1504                        (list 'rfc822size (elmo-read (current-buffer))))
1505                       ((eq token 'BODY)
1506                        (if (eq (char-before) ?\[)
1507                            (list
1508                             'bodydetail
1509                             (upcase (elmo-imap4-parse-fetch-body-section))
1510                             (and
1511                              (eq (char-after (point)) ?<)
1512                              (buffer-substring (1+ (point))
1513                                                (progn
1514                                                  (search-forward ">" nil t)
1515                                                  (point))))
1516                             (progn (elmo-imap4-forward)
1517                                    (elmo-imap4-parse-nstring)))
1518                          (list 'body (elmo-imap4-parse-body))))
1519                       ((eq token 'BODYSTRUCTURE)
1520                        (list 'bodystructure (elmo-imap4-parse-body)))))
1521           (setq list (cons element list))))
1522       (and elmo-imap4-fetch-callback
1523            (funcall elmo-imap4-fetch-callback
1524                     list elmo-imap4-fetch-callback-data))
1525       (list 'fetch list))))
1526
1527 (defun elmo-imap4-parse-status ()
1528   (let ((mailbox (elmo-imap4-parse-mailbox))
1529         status)
1530     (when (and mailbox (search-forward "(" nil t))
1531       (while (not (eq (char-after (point)) ?\)))
1532         (setq status
1533               (cons
1534                (let ((token (elmo-read (current-buffer))))
1535                  (cond ((eq token 'MESSAGES)
1536                         (list 'messages (elmo-read (current-buffer))))
1537                        ((eq token 'RECENT)
1538                         (list 'recent (elmo-read (current-buffer))))
1539                        ((eq token 'UIDNEXT)
1540                         (list 'uidnext (elmo-read (current-buffer))))
1541                        ((eq token 'UIDVALIDITY)
1542                         (and (looking-at " \\([0-9]+\\)")
1543                              (prog1 (list 'uidvalidity (match-string 1))
1544                                (goto-char (match-end 1)))))
1545                        ((eq token 'UNSEEN)
1546                         (list 'unseen (elmo-read (current-buffer))))
1547                        (t
1548                         (message
1549                          "Unknown status data %s in mailbox %s ignored"
1550                          token mailbox))))
1551                status))
1552         (skip-chars-forward " ")))
1553     (and elmo-imap4-status-callback
1554          (funcall elmo-imap4-status-callback
1555                   status
1556                   elmo-imap4-status-callback-data))
1557     (list 'status status)))
1558
1559
1560 (defmacro elmo-imap4-value (value)
1561   (` (if (eq (, value) 'NIL) nil
1562        (, value))))
1563
1564 (defmacro elmo-imap4-nth (pos list)
1565   (` (let ((value (nth (, pos) (, list))))
1566        (elmo-imap4-value value))))
1567
1568 (defun elmo-imap4-parse-namespace ()
1569   (list 'namespace
1570         (nconc
1571          (copy-sequence elmo-imap4-extra-namespace-alist)
1572          (elmo-imap4-parse-namespace-subr
1573           (elmo-read (concat "(" (buffer-substring
1574                                   (point) (point-max))
1575                              ")"))))))
1576
1577 (defun elmo-imap4-parse-namespace-subr (ns)
1578   (let (prefix delim namespace-alist default-delim)
1579     ;; 0: personal, 1: other, 2: shared
1580     (dotimes (i 3)
1581       (setq namespace-alist
1582             (nconc namespace-alist
1583                    (delq nil
1584                          (mapcar
1585                           (lambda (namespace)
1586                             (setq prefix (elmo-imap4-nth 0 namespace)
1587                                   delim (elmo-imap4-nth 1 namespace))
1588                             (if (and prefix delim
1589                                      (string-match
1590                                       (concat (regexp-quote delim) "\\'")
1591                                       prefix))
1592                                 (setq prefix (substring prefix 0
1593                                                         (match-beginning 0))))
1594                             (if (eq (length prefix) 0)
1595                                 (progn (setq default-delim delim) nil)
1596                               (cons
1597                                (concat "^\\("
1598                                        (if (string= (downcase prefix) "inbox")
1599                                            "[Ii][Nn][Bb][Oo][Xx]"
1600                                          (regexp-quote prefix))
1601                                        "\\).*$")
1602                                delim)))
1603                           (elmo-imap4-nth i ns))))))
1604     (if default-delim
1605         (setq namespace-alist
1606               (nconc namespace-alist
1607                      (list (cons "^.*$" default-delim)))))
1608     namespace-alist))
1609
1610 (defun elmo-imap4-parse-acl ()
1611   (let ((mailbox (elmo-imap4-parse-mailbox))
1612         identifier rights acl)
1613     (while (eq (char-after (point)) ?\ )
1614       (elmo-imap4-forward)
1615       (setq identifier (elmo-imap4-parse-astring))
1616       (elmo-imap4-forward)
1617       (setq rights (elmo-imap4-parse-astring))
1618       (setq acl (append acl (list (cons identifier rights)))))
1619     (list 'acl acl mailbox)))
1620
1621 (defun elmo-imap4-parse-flag-list ()
1622   (let ((str (buffer-substring (+ (point) 1)
1623                                (progn (search-forward ")" nil t)
1624                                       (- (point) 1)))))
1625     (unless (eq (length str) 0)
1626       (split-string str))))
1627
1628 (defun elmo-imap4-parse-envelope ()
1629   (when (eq (char-after (point)) ?\()
1630     (elmo-imap4-forward)
1631     (vector (prog1 (elmo-imap4-parse-nstring);; date
1632               (elmo-imap4-forward))
1633             (prog1 (elmo-imap4-parse-nstring);; subject
1634               (elmo-imap4-forward))
1635             (prog1 (elmo-imap4-parse-address-list);; from
1636               (elmo-imap4-forward))
1637             (prog1 (elmo-imap4-parse-address-list);; sender
1638               (elmo-imap4-forward))
1639             (prog1 (elmo-imap4-parse-address-list);; reply-to
1640               (elmo-imap4-forward))
1641             (prog1 (elmo-imap4-parse-address-list);; to
1642               (elmo-imap4-forward))
1643             (prog1 (elmo-imap4-parse-address-list);; cc
1644               (elmo-imap4-forward))
1645             (prog1 (elmo-imap4-parse-address-list);; bcc
1646               (elmo-imap4-forward))
1647             (prog1 (elmo-imap4-parse-nstring);; in-reply-to
1648               (elmo-imap4-forward))
1649             (prog1 (elmo-imap4-parse-nstring);; message-id
1650               (elmo-imap4-forward)))))
1651
1652 (defsubst elmo-imap4-parse-string-list ()
1653   (cond ((eq (char-after (point)) ?\();; body-fld-param
1654          (let (strlist str)
1655            (elmo-imap4-forward)
1656            (while (setq str (elmo-imap4-parse-string))
1657              (push str strlist)
1658              (elmo-imap4-forward))
1659            (nreverse strlist)))
1660         ((elmo-imap4-parse-nil)
1661          nil)))
1662
1663 (defun elmo-imap4-parse-body-extension ()
1664   (if (eq (char-after (point)) ?\()
1665       (let (b-e)
1666         (elmo-imap4-forward)
1667         (push (elmo-imap4-parse-body-extension) b-e)
1668         (while (eq (char-after (point)) ?\ )
1669           (elmo-imap4-forward)
1670           (push (elmo-imap4-parse-body-extension) b-e))
1671         (assert (eq (char-after (point)) ?\)))
1672         (elmo-imap4-forward)
1673         (nreverse b-e))
1674     (or (elmo-imap4-parse-number)
1675         (elmo-imap4-parse-nstring))))
1676
1677 (defsubst elmo-imap4-parse-body-ext ()
1678   (let (ext)
1679     (when (eq (char-after (point)) ?\ );; body-fld-dsp
1680       (elmo-imap4-forward)
1681       (let (dsp)
1682         (if (eq (char-after (point)) ?\()
1683             (progn
1684               (elmo-imap4-forward)
1685               (push (elmo-imap4-parse-string) dsp)
1686               (elmo-imap4-forward)
1687               (push (elmo-imap4-parse-string-list) dsp)
1688               (elmo-imap4-forward))
1689           (assert (elmo-imap4-parse-nil)))
1690         (push (nreverse dsp) ext))
1691       (when (eq (char-after (point)) ?\ );; body-fld-lang
1692         (elmo-imap4-forward)
1693         (if (eq (char-after (point)) ?\()
1694             (push (elmo-imap4-parse-string-list) ext)
1695           (push (elmo-imap4-parse-nstring) ext))
1696         (while (eq (char-after (point)) ?\ );; body-extension
1697           (elmo-imap4-forward)
1698           (setq ext (append (elmo-imap4-parse-body-extension) ext)))))
1699     ext))
1700
1701 (defun elmo-imap4-parse-body ()
1702   (let (body)
1703     (when (eq (char-after (point)) ?\()
1704       (elmo-imap4-forward)
1705       (if (eq (char-after (point)) ?\()
1706           (let (subbody)
1707             (while (and (eq (char-after (point)) ?\()
1708                         (setq subbody (elmo-imap4-parse-body)))
1709               (push subbody body))
1710             (elmo-imap4-forward)
1711             (push (elmo-imap4-parse-string) body);; media-subtype
1712             (when (eq (char-after (point)) ?\ );; body-ext-mpart:
1713               (elmo-imap4-forward)
1714               (if (eq (char-after (point)) ?\();; body-fld-param
1715                   (push (elmo-imap4-parse-string-list) body)
1716                 (push (and (elmo-imap4-parse-nil) nil) body))
1717               (setq body
1718                     (append (elmo-imap4-parse-body-ext) body)));; body-ext-...
1719             (assert (eq (char-after (point)) ?\)))
1720             (elmo-imap4-forward)
1721             (nreverse body))
1722
1723         (push (elmo-imap4-parse-string) body);; media-type
1724         (elmo-imap4-forward)
1725         (push (elmo-imap4-parse-string) body);; media-subtype
1726         (elmo-imap4-forward)
1727         ;; next line for Sun SIMS bug
1728         (and (eq (char-after (point)) ? ) (elmo-imap4-forward))
1729         (if (eq (char-after (point)) ?\();; body-fld-param
1730             (push (elmo-imap4-parse-string-list) body)
1731           (push (and (elmo-imap4-parse-nil) nil) body))
1732         (elmo-imap4-forward)
1733         (push (elmo-imap4-parse-nstring) body);; body-fld-id
1734         (elmo-imap4-forward)
1735         (push (elmo-imap4-parse-nstring) body);; body-fld-desc
1736         (elmo-imap4-forward)
1737         (push (elmo-imap4-parse-string) body);; body-fld-enc
1738         (elmo-imap4-forward)
1739         (push (elmo-imap4-parse-number) body);; body-fld-octets
1740
1741         ;; ok, we're done parsing the required parts, what comes now is one
1742         ;; of three things:
1743         ;;
1744         ;; envelope       (then we're parsing body-type-msg)
1745         ;; body-fld-lines (then we're parsing body-type-text)
1746         ;; body-ext-1part (then we're parsing body-type-basic)
1747         ;;
1748         ;; the problem is that the two first are in turn optionally followed
1749         ;; by the third.  So we parse the first two here (if there are any)...
1750
1751         (when (eq (char-after (point)) ?\ )
1752           (elmo-imap4-forward)
1753           (let (lines)
1754             (cond ((eq (char-after (point)) ?\();; body-type-msg:
1755                    (push (elmo-imap4-parse-envelope) body);; envelope
1756                    (elmo-imap4-forward)
1757                    (push (elmo-imap4-parse-body) body);; body
1758                    (elmo-imap4-forward)
1759                    (push (elmo-imap4-parse-number) body));; body-fld-lines
1760                   ((setq lines (elmo-imap4-parse-number));; body-type-text:
1761                    (push lines body));; body-fld-lines
1762                   (t
1763                    (backward-char)))));; no match...
1764
1765         ;; ...and then parse the third one here...
1766
1767         (when (eq (char-after (point)) ?\ );; body-ext-1part:
1768           (elmo-imap4-forward)
1769           (push (elmo-imap4-parse-nstring) body);; body-fld-md5
1770           (setq body
1771                 (append (elmo-imap4-parse-body-ext) body)));; body-ext-1part..
1772
1773         (assert (eq (char-after (point)) ?\)))
1774         (elmo-imap4-forward)
1775         (nreverse body)))))
1776
1777 (luna-define-method elmo-folder-initialize :around ((folder
1778                                                      elmo-imap4-folder)
1779                                                     name)
1780   (let ((default-user   elmo-imap4-default-user)
1781         (default-server elmo-imap4-default-server)
1782         (default-port   elmo-imap4-default-port)
1783         (elmo-network-stream-type-alist
1784          (if elmo-imap4-stream-type-alist
1785              (append elmo-imap4-stream-type-alist
1786                      elmo-network-stream-type-alist)
1787            elmo-network-stream-type-alist))
1788         parse)
1789     (when (string-match "\\(.*\\)@\\(.*\\)" default-server)
1790       ;; case: imap4-default-server is specified like
1791       ;; "hoge%imap.server@gateway".
1792       (setq default-user (elmo-match-string 1 default-server))
1793       (setq default-server (elmo-match-string 2 default-server)))
1794     (setq name (luna-call-next-method))
1795     ;; mailbox
1796     (setq parse (elmo-parse-token name ":"))
1797     (elmo-imap4-folder-set-mailbox-internal folder
1798                                             (elmo-imap4-encode-folder-string
1799                                              (car parse)))
1800     ;; user
1801     (setq parse (elmo-parse-prefixed-element ?: (cdr parse) "/"))
1802     (elmo-net-folder-set-user-internal folder
1803                                        (if (eq (length (car parse)) 0)
1804                                            default-user
1805                                          (car parse)))
1806     ;; auth
1807     (setq parse (elmo-parse-prefixed-element ?/ (cdr parse)))
1808     (elmo-net-folder-set-auth-internal
1809      folder
1810      (if (eq (length (car parse)) 0)
1811          (or elmo-imap4-default-authenticate-type 'clear)
1812        (intern (car parse))))
1813     (unless (elmo-net-folder-server-internal folder)
1814       (elmo-net-folder-set-server-internal folder default-server))
1815     (unless (elmo-net-folder-port-internal folder)
1816       (elmo-net-folder-set-port-internal folder default-port))
1817     (unless (elmo-net-folder-stream-type-internal folder)
1818       (elmo-net-folder-set-stream-type-internal
1819        folder
1820        (elmo-get-network-stream-type elmo-imap4-default-stream-type)))
1821     folder))
1822
1823 ;;; ELMO IMAP4 folder
1824 (luna-define-method elmo-folder-expand-msgdb-path ((folder
1825                                                     elmo-imap4-folder))
1826   (convert-standard-filename
1827    (let ((mailbox (elmo-imap4-folder-mailbox-internal folder)))
1828      (if (string= "inbox" (downcase mailbox))
1829          (setq mailbox "inbox"))
1830      (if (eq (string-to-char mailbox) ?/)
1831          (setq mailbox (substring mailbox 1 (length mailbox))))
1832      (expand-file-name
1833       mailbox
1834       (expand-file-name
1835        (or (elmo-net-folder-user-internal folder) "nobody")
1836        (expand-file-name (or (elmo-net-folder-server-internal folder)
1837                              "nowhere")
1838                          (expand-file-name
1839                           "imap"
1840                           elmo-msgdb-directory)))))))
1841
1842 (luna-define-method elmo-folder-status-plugged ((folder
1843                                                  elmo-imap4-folder))
1844   (elmo-imap4-folder-status-plugged folder))
1845
1846 (defun elmo-imap4-folder-status-plugged (folder)
1847   (let ((session (elmo-imap4-get-session folder))
1848         (killed (elmo-msgdb-killed-list-load
1849                  (elmo-folder-msgdb-path folder)))
1850         status)
1851     (with-current-buffer (elmo-network-session-buffer session)
1852       (setq elmo-imap4-status-callback nil)
1853       (setq elmo-imap4-status-callback-data nil))
1854     (setq status (elmo-imap4-response-value
1855                   (elmo-imap4-send-command-wait
1856                    session
1857                    (list "status "
1858                          (elmo-imap4-mailbox
1859                           (elmo-imap4-folder-mailbox-internal folder))
1860                          " (uidnext messages)"))
1861                   'status))
1862     (cons
1863      (- (elmo-imap4-response-value status 'uidnext) 1)
1864      (if killed
1865          (-
1866           (elmo-imap4-response-value status 'messages)
1867           (elmo-msgdb-killed-list-length killed))
1868        (elmo-imap4-response-value status 'messages)))))
1869
1870 (luna-define-method elmo-folder-list-messages-plugged ((folder
1871                                                         elmo-imap4-folder)
1872                                                        &optional nohide)
1873   (elmo-imap4-list folder
1874                    (let ((max (elmo-msgdb-max-of-killed
1875                                (elmo-folder-killed-list-internal folder))))
1876                      (if (or nohide
1877                              (null (eq max 0)))
1878                          (format "uid %d:*" (1+ max))
1879                        "all"))))
1880
1881 (luna-define-method elmo-folder-list-unreads-plugged
1882   ((folder elmo-imap4-folder))
1883   (elmo-imap4-list folder "unseen"))
1884
1885 (luna-define-method elmo-folder-list-importants-plugged
1886   ((folder elmo-imap4-folder))
1887   (elmo-imap4-list folder "flagged"))
1888
1889 (luna-define-method elmo-folder-list-answereds-plugged
1890   ((folder elmo-imap4-folder))
1891   (elmo-imap4-list folder "answered"))
1892
1893 (defun elmo-imap4-folder-list-any-plugged (folder)
1894   (elmo-imap4-list folder "or answered or unseen flagged"))
1895
1896 (defun elmo-imap4-folder-list-digest-plugged (folder)
1897   (elmo-imap4-list folder "or unseen flagged"))
1898
1899 (luna-define-method elmo-folder-use-flag-p ((folder elmo-imap4-folder))
1900   (not (string-match elmo-imap4-disuse-server-flag-mailbox-regexp
1901                      (elmo-imap4-folder-mailbox-internal folder))))
1902
1903 (luna-define-method elmo-folder-list-subfolders ((folder elmo-imap4-folder)
1904                                                  &optional one-level)
1905   (let* ((root (elmo-imap4-folder-mailbox-internal folder))
1906          (session (elmo-imap4-get-session folder))
1907          (prefix (elmo-folder-prefix-internal folder))
1908          (delim (or
1909                  (cdr
1910                   (elmo-string-matched-assoc
1911                    root
1912                    (with-current-buffer (elmo-network-session-buffer session)
1913                      elmo-imap4-server-namespace)))
1914                  elmo-imap4-default-hierarchy-delimiter))
1915          ;; Append delimiter when root with namespace.
1916          (root (if (and (match-end 1)
1917                         (string= (substring root (match-end 1))
1918                                  ""))
1919                    (concat root delim)
1920                  root))
1921          result append-serv type)
1922     (setq result (elmo-imap4-response-get-selectable-mailbox-list
1923                   (elmo-imap4-send-command-wait
1924                    session
1925                    (list "list " (elmo-imap4-mailbox root) " *"))))
1926     (when (or (not (string= (elmo-net-folder-user-internal folder)
1927                             elmo-imap4-default-user))
1928               (not (eq (elmo-net-folder-auth-internal folder)
1929                        (or elmo-imap4-default-authenticate-type 'clear))))
1930       (setq append-serv (concat ":" (elmo-net-folder-user-internal folder))))
1931     (unless (eq (elmo-net-folder-auth-internal folder)
1932                 (or elmo-imap4-default-authenticate-type 'clear))
1933       (setq append-serv
1934             (concat append-serv "/"
1935                     (symbol-name (elmo-net-folder-auth-internal folder)))))
1936     (unless (string= (elmo-net-folder-server-internal folder)
1937                      elmo-imap4-default-server)
1938       (setq append-serv (concat append-serv "@"
1939                                 (elmo-net-folder-server-internal folder))))
1940     (unless (eq (elmo-net-folder-port-internal folder) elmo-imap4-default-port)
1941       (setq append-serv (concat append-serv ":"
1942                                 (int-to-string
1943                                  (elmo-net-folder-port-internal folder)))))
1944     (setq type (elmo-net-folder-stream-type-internal folder))
1945     (unless (eq (elmo-network-stream-type-symbol type)
1946                 elmo-imap4-default-stream-type)
1947       (if type
1948           (setq append-serv (concat append-serv
1949                                     (elmo-network-stream-type-spec-string
1950                                      type)))))
1951     (if one-level
1952         (let ((re-delim (regexp-quote delim))
1953               (case-fold-search nil)
1954               folder ret has-child-p)
1955           ;; Append delimiter
1956           (when (and root
1957                      (not (string= root ""))
1958                      (not (string-match
1959                            (concat "\\(.*\\)" re-delim "\\'")
1960                            root)))
1961             (setq root (concat root delim)))
1962           (while (setq folder (car result))
1963             (when (string-match
1964                    (concat "^\\(" (regexp-quote root) "[^" re-delim "]" "+\\)"
1965                            re-delim)
1966                    folder)
1967               (setq folder (match-string 1 folder)))
1968             (setq has-child-p nil
1969                   result (delq
1970                           nil
1971                           (mapcar (lambda (fld)
1972                                     (if (string-match
1973                                          (concat "^" (regexp-quote folder)
1974                                                  "\\(" re-delim "\\|\\'\\)")
1975                                          fld)
1976                                         (progn (setq has-child-p t) nil)
1977                                       fld))
1978                                   (cdr result)))
1979                   folder (concat prefix
1980                                  (elmo-imap4-decode-folder-string folder)
1981                                  (and append-serv
1982                                       (eval append-serv)))
1983                   ret (append ret (if has-child-p
1984                                       (list (list folder))
1985                                     (list folder)))))
1986           ret)
1987       (mapcar (lambda (fld)
1988                 (concat prefix (elmo-imap4-decode-folder-string fld)
1989                         (and append-serv
1990                              (eval append-serv))))
1991               result))))
1992
1993 (luna-define-method elmo-folder-exists-p-plugged ((folder elmo-imap4-folder))
1994   (let ((session (elmo-imap4-get-session folder)))
1995     (if (string=
1996          (elmo-imap4-session-current-mailbox-internal session)
1997          (elmo-imap4-folder-mailbox-internal folder))
1998         t
1999       (elmo-imap4-session-select-mailbox
2000        session
2001        (elmo-imap4-folder-mailbox-internal folder)
2002        'force 'notify-bye))))
2003
2004 (luna-define-method elmo-folder-creatable-p ((folder elmo-imap4-folder))
2005   t)
2006
2007 (luna-define-method elmo-folder-writable-p ((folder elmo-imap4-folder))
2008   t)
2009
2010 (luna-define-method elmo-folder-delete :before ((folder elmo-imap4-folder))
2011   (let ((session (elmo-imap4-get-session folder))
2012         msgs)
2013     (when (elmo-imap4-folder-mailbox-internal folder)
2014       (when (setq msgs (elmo-folder-list-messages folder))
2015         (elmo-folder-delete-messages folder msgs))
2016       (elmo-imap4-send-command-wait session "close")
2017       (elmo-imap4-send-command-wait
2018        session
2019        (list "delete "
2020              (elmo-imap4-mailbox
2021               (elmo-imap4-folder-mailbox-internal folder)))))))
2022
2023 (luna-define-method elmo-folder-rename-internal ((folder elmo-imap4-folder)
2024                                                  new-folder)
2025   (let ((session (elmo-imap4-get-session folder)))
2026     ;; make sure the folder is selected.
2027     (elmo-imap4-session-select-mailbox session
2028                                        (elmo-imap4-folder-mailbox-internal
2029                                         folder))
2030     (elmo-imap4-send-command-wait session "close")
2031     (elmo-imap4-send-command-wait
2032      session
2033      (list "rename "
2034            (elmo-imap4-mailbox
2035             (elmo-imap4-folder-mailbox-internal folder))
2036            " "
2037            (elmo-imap4-mailbox
2038             (elmo-imap4-folder-mailbox-internal new-folder))))
2039     (elmo-imap4-session-set-current-mailbox-internal
2040      session (elmo-imap4-folder-mailbox-internal new-folder))))
2041
2042 (defun elmo-imap4-copy-messages (src-folder dst-folder numbers)
2043   (let ((session (elmo-imap4-get-session src-folder))
2044         (set-list (elmo-imap4-make-number-set-list
2045                    numbers
2046                    elmo-imap4-number-set-chop-length))
2047         succeeds)
2048     (elmo-imap4-session-select-mailbox session
2049                                        (elmo-imap4-folder-mailbox-internal
2050                                         src-folder))
2051     (while set-list
2052       (if (elmo-imap4-send-command-wait session
2053                                         (list
2054                                          (format
2055                                           (if elmo-imap4-use-uid
2056                                               "uid copy %s "
2057                                             "copy %s ")
2058                                           (cdr (car set-list)))
2059                                          (elmo-imap4-mailbox
2060                                           (elmo-imap4-folder-mailbox-internal
2061                                            dst-folder))))
2062           (setq succeeds (append succeeds numbers)))
2063       (setq set-list (cdr set-list)))
2064     succeeds))
2065
2066 (defun elmo-imap4-set-flag (folder numbers flag &optional remove)
2067   "Set flag on messages.
2068 FOLDER is the ELMO folder structure.
2069 NUMBERS is the message numbers to be flagged.
2070 FLAG is the flag name.
2071 If optional argument REMOVE is non-nil, remove FLAG."
2072   (let ((session (elmo-imap4-get-session folder))
2073         response set-list)
2074     (elmo-imap4-session-select-mailbox session
2075                                        (elmo-imap4-folder-mailbox-internal
2076                                         folder))
2077     (setq set-list (elmo-imap4-make-number-set-list
2078                     numbers
2079                     elmo-imap4-number-set-chop-length))
2080     (while set-list
2081       (with-current-buffer (elmo-network-session-buffer session)
2082         (setq elmo-imap4-fetch-callback nil)
2083         (setq elmo-imap4-fetch-callback-data nil))
2084       (unless (elmo-imap4-response-ok-p
2085                (elmo-imap4-send-command-wait
2086                 session
2087                 (format
2088                  (if elmo-imap4-use-uid
2089                      "uid store %s %sflags.silent (%s)"
2090                    "store %s %sflags.silent (%s)")
2091                  (cdr (car set-list))
2092                  (if remove "-" "+")
2093                  flag)))
2094         (setq response 'fail))
2095       (setq set-list (cdr set-list)))
2096     (not (eq response 'fail))))
2097
2098 (luna-define-method elmo-folder-delete-messages-plugged
2099   ((folder elmo-imap4-folder) numbers)
2100   (let ((session (elmo-imap4-get-session folder)))
2101     (elmo-imap4-set-flag folder numbers "\\Deleted")
2102     (elmo-imap4-send-command-wait session "expunge")))
2103
2104 (defmacro elmo-imap4-detect-search-charset (string)
2105   (` (with-temp-buffer
2106        (insert (, string))
2107        (detect-mime-charset-region (point-min) (point-max)))))
2108
2109 (defun elmo-imap4-search-internal-primitive (folder session filter from-msgs)
2110   (let ((search-key (elmo-filter-key filter))
2111         (imap-search-keys '("bcc" "body" "cc" "from" "subject" "to"
2112                             "larger" "smaller" "mark"))
2113         (total 0)
2114         (length (length from-msgs))
2115         charset set-list end results)
2116     (message "Searching...")
2117     (cond
2118      ((string= "last" search-key)
2119       (let ((numbers (or from-msgs (elmo-folder-list-messages folder))))
2120         (nthcdr (max (- (length numbers)
2121                         (string-to-int (elmo-filter-value filter)))
2122                      0)
2123                 numbers)))
2124      ((string= "first" search-key)
2125       (let* ((numbers (or from-msgs (elmo-folder-list-messages folder)))
2126              (rest (nthcdr (string-to-int (elmo-filter-value filter) )
2127                            numbers)))
2128         (mapcar '(lambda (x) (delete x numbers)) rest)
2129         numbers))
2130      ((string= "flag" search-key)
2131       (cond
2132        ((string= "unread" (elmo-filter-value filter))
2133         (elmo-folder-list-unreads folder))
2134        ((string= "important" (elmo-filter-value filter))
2135         (elmo-folder-list-importants folder))
2136        ((string= "answered" (elmo-filter-value filter))
2137         (elmo-folder-list-answereds folder))
2138        ((string= "digest" (elmo-filter-value filter))
2139         (elmo-imap4-folder-list-digest-plugged folder))
2140        ((string= "any" (elmo-filter-value filter))
2141         (elmo-imap4-folder-list-any-plugged folder))))
2142      ((or (string= "since" search-key)
2143           (string= "before" search-key))
2144       (setq search-key (concat "sent" search-key)
2145             set-list (elmo-imap4-make-number-set-list
2146                       from-msgs
2147                       elmo-imap4-number-set-chop-length)
2148             end nil)
2149       (while (not end)
2150         (setq results
2151               (append
2152                results
2153                (elmo-imap4-response-value
2154                 (elmo-imap4-send-command-wait
2155                  session
2156                  (format
2157                   (if elmo-imap4-use-uid
2158                       "uid search %s%s%s %s"
2159                     "search %s%s%s %s")
2160                   (if from-msgs
2161                       (concat
2162                        (if elmo-imap4-use-uid "uid ")
2163                        (cdr (car set-list))
2164                        " ")
2165                     "")
2166                   (if (eq (elmo-filter-type filter)
2167                           'unmatch)
2168                       "not " "")
2169                   search-key
2170                   (elmo-date-get-description
2171                    (elmo-date-get-datevec
2172                     (elmo-filter-value filter)))))
2173                 'search)))
2174         (when (> length elmo-display-progress-threshold)
2175           (setq total (+ total (car (car set-list))))
2176           (elmo-display-progress
2177            'elmo-imap4-search "Searching..."
2178            (/ (* total 100) length)))
2179         (setq set-list (cdr set-list)
2180               end (null set-list)))
2181       results)
2182      (t
2183       (setq charset
2184             (if (eq (length (elmo-filter-value filter)) 0)
2185                 (setq charset 'us-ascii)
2186               (elmo-imap4-detect-search-charset
2187                (elmo-filter-value filter)))
2188             set-list (elmo-imap4-make-number-set-list
2189                       from-msgs
2190                       elmo-imap4-number-set-chop-length)
2191             end nil)
2192       (while (not end)
2193         (setq results
2194               (append
2195                results
2196                (elmo-imap4-response-value
2197                 (elmo-imap4-send-command-wait
2198                  session
2199                  (list
2200                   (if elmo-imap4-use-uid "uid ")
2201                   "search "
2202                   "CHARSET "
2203                   (elmo-imap4-astring
2204                    (symbol-name charset))
2205                   " "
2206                   (if from-msgs
2207                       (concat
2208                        (if elmo-imap4-use-uid "uid ")
2209                        (cdr (car set-list))
2210                        " ")
2211                     "")
2212                   (if (eq (elmo-filter-type filter)
2213                           'unmatch)
2214                       "not " "")
2215                   (format "%s%s "
2216                           (if (member
2217                                (elmo-filter-key filter)
2218                                imap-search-keys)
2219                               ""
2220                             "header ")
2221                           (elmo-filter-key filter))
2222                   (elmo-imap4-astring
2223                    (encode-mime-charset-string
2224                     (elmo-filter-value filter) charset))))
2225                 'search)))
2226         (when (> length elmo-display-progress-threshold)
2227           (setq total (+ total (car (car set-list))))
2228           (elmo-display-progress
2229            'elmo-imap4-search "Searching..."
2230            (/ (* total 100) length)))
2231         (setq set-list (cdr set-list)
2232               end (null set-list)))
2233       results))))
2234
2235 (defun elmo-imap4-search-internal (folder session condition from-msgs)
2236   (let (result)
2237     (cond
2238      ((vectorp condition)
2239       (setq result (elmo-imap4-search-internal-primitive
2240                     folder session condition from-msgs)))
2241      ((eq (car condition) 'and)
2242       (setq result (elmo-imap4-search-internal folder session (nth 1 condition)
2243                                                from-msgs)
2244             result (elmo-list-filter result
2245                                      (elmo-imap4-search-internal
2246                                       folder session (nth 2 condition)
2247                                       from-msgs))))
2248      ((eq (car condition) 'or)
2249       (setq result (elmo-imap4-search-internal
2250                     folder session (nth 1 condition) from-msgs)
2251             result (elmo-uniq-list
2252                     (nconc result
2253                            (elmo-imap4-search-internal
2254                             folder session (nth 2 condition) from-msgs)))
2255             result (sort result '<))))))
2256
2257 (luna-define-method elmo-folder-search :around ((folder elmo-imap4-folder)
2258                                                 condition &optional numbers)
2259   (if (elmo-folder-plugged-p folder)
2260       (save-excursion
2261         (let ((session (elmo-imap4-get-session folder)))
2262           (elmo-imap4-session-select-mailbox
2263            session
2264            (elmo-imap4-folder-mailbox-internal folder))
2265           (elmo-imap4-search-internal folder session condition numbers)))
2266     (luna-call-next-method)))
2267
2268 (luna-define-method elmo-folder-msgdb-create-plugged
2269   ((folder elmo-imap4-folder) numbers seen-list)
2270   (when numbers
2271     (let ((session (elmo-imap4-get-session folder))
2272           (headers
2273            (append
2274             '("Subject" "From" "To" "Cc" "Date"
2275               "Message-Id" "References" "In-Reply-To")
2276             elmo-msgdb-extra-fields))
2277           (total 0)
2278           (length (length numbers))
2279           rfc2060 set-list)
2280       (setq rfc2060 (memq 'imap4rev1
2281                           (elmo-imap4-session-capability-internal
2282                            session)))
2283       (message "Getting overview...")
2284       (elmo-imap4-session-select-mailbox
2285        session (elmo-imap4-folder-mailbox-internal folder))
2286       (setq set-list (elmo-imap4-make-number-set-list
2287                       numbers
2288                       elmo-imap4-overview-fetch-chop-length))
2289       ;; Setup callback.
2290       (with-current-buffer (elmo-network-session-buffer session)
2291         (setq elmo-imap4-current-msgdb nil
2292               elmo-imap4-seen-messages nil
2293               elmo-imap4-fetch-callback 'elmo-imap4-fetch-callback-1
2294               elmo-imap4-fetch-callback-data (cons seen-list
2295                                                    (elmo-folder-use-flag-p
2296                                                     folder)))
2297         (while set-list
2298           (elmo-imap4-send-command-wait
2299            session
2300            ;; get overview entity from IMAP4
2301            (format "%sfetch %s (%s rfc822.size flags)"
2302                    (if elmo-imap4-use-uid "uid " "")
2303                    (cdr (car set-list))
2304                    (if rfc2060
2305                        (format "body.peek[header.fields %s]" headers)
2306                      (format "%s" headers))))
2307           (when (> length elmo-display-progress-threshold)
2308             (setq total (+ total (car (car set-list))))
2309             (elmo-display-progress
2310              'elmo-imap4-msgdb-create "Getting overview..."
2311              (/ (* total 100) length)))
2312           (setq set-list (cdr set-list)))
2313         (message "Getting overview...done")
2314         (when elmo-imap4-seen-messages
2315           (elmo-imap4-set-flag folder elmo-imap4-seen-messages "\\Seen"))
2316         elmo-imap4-current-msgdb))))
2317
2318 (luna-define-method elmo-folder-unmark-important-plugged
2319   ((folder elmo-imap4-folder) numbers)
2320   (elmo-imap4-set-flag folder numbers "\\Flagged" 'remove))
2321
2322 (luna-define-method elmo-folder-mark-as-important-plugged
2323   ((folder elmo-imap4-folder) numbers)
2324   (elmo-imap4-set-flag folder numbers "\\Flagged"))
2325
2326 (luna-define-method elmo-folder-unmark-read-plugged
2327   ((folder elmo-imap4-folder) numbers)
2328   (elmo-imap4-set-flag folder numbers "\\Seen" 'remove))
2329
2330 (luna-define-method elmo-folder-mark-as-read-plugged
2331   ((folder elmo-imap4-folder) numbers)
2332   (elmo-imap4-set-flag folder numbers "\\Seen"))
2333
2334 (luna-define-method elmo-folder-unmark-answered-plugged
2335   ((folder elmo-imap4-folder) numbers)
2336   (elmo-imap4-set-flag folder numbers "\\Answered" 'remove))
2337
2338 (luna-define-method elmo-folder-mark-as-answered-plugged
2339   ((folder elmo-imap4-folder) numbers)
2340   (elmo-imap4-set-flag folder numbers "\\Answered"))
2341
2342 (luna-define-method elmo-message-use-cache-p ((folder elmo-imap4-folder)
2343                                               number)
2344   elmo-imap4-use-cache)
2345
2346 (luna-define-method elmo-folder-message-appendable-p ((folder elmo-imap4-folder))
2347   (if (elmo-folder-plugged-p folder)
2348       (not (elmo-imap4-session-read-only-internal
2349             (elmo-imap4-get-session folder)))
2350     elmo-enable-disconnected-operation)) ; offline refile.
2351
2352 (luna-define-method elmo-folder-check-plugged ((folder elmo-imap4-folder))
2353   (let ((session (elmo-imap4-get-session folder 'if-exists)))
2354     (when session
2355       (if (string=
2356            (elmo-imap4-session-current-mailbox-internal session)
2357            (elmo-imap4-folder-mailbox-internal folder))
2358           (if elmo-imap4-use-select-to-update-status
2359               (elmo-imap4-session-select-mailbox
2360                session
2361                (elmo-imap4-folder-mailbox-internal folder)
2362                'force)
2363             (elmo-imap4-session-check session))))))
2364
2365 (defsubst elmo-imap4-folder-diff-plugged (folder)
2366   (let ((session (elmo-imap4-get-session folder))
2367         messages new unread response killed)
2368 ;;; (elmo-imap4-commit spec)
2369     (with-current-buffer (elmo-network-session-buffer session)
2370       (setq elmo-imap4-status-callback nil)
2371       (setq elmo-imap4-status-callback-data nil))
2372     (setq response
2373           (elmo-imap4-send-command-wait session
2374                                         (list
2375                                          "status "
2376                                          (elmo-imap4-mailbox
2377                                           (elmo-imap4-folder-mailbox-internal
2378                                            folder))
2379                                          " (recent unseen messages)")))
2380     (setq response (elmo-imap4-response-value response 'status))
2381     (setq messages (elmo-imap4-response-value response 'messages))
2382     (setq killed (elmo-msgdb-killed-list-load (elmo-folder-msgdb-path folder)))
2383     (if killed
2384         (setq messages (- messages
2385                           (elmo-msgdb-killed-list-length
2386                            killed))))
2387     (setq new (elmo-imap4-response-value response 'recent)
2388           unread (elmo-imap4-response-value response 'unseen))
2389     (if (< unread new) (setq new unread))
2390     (list new unread messages)))
2391
2392 (luna-define-method elmo-folder-diff-plugged ((folder elmo-imap4-folder))
2393   (elmo-imap4-folder-diff-plugged folder))
2394
2395 (luna-define-method elmo-folder-diff-async ((folder elmo-imap4-folder)
2396                                             &optional number-alist)
2397   (setq elmo-imap4-server-diff-async-callback
2398         elmo-folder-diff-async-callback)
2399   (setq elmo-imap4-server-diff-async-callback-data
2400         elmo-folder-diff-async-callback-data)
2401   (elmo-imap4-server-diff-async folder))
2402
2403 (luna-define-method elmo-folder-open :around ((folder elmo-imap4-folder)
2404                                               &optional load-msgdb)
2405   (if (elmo-folder-plugged-p folder)
2406       (let (session mailbox msgdb result response tag)
2407         (condition-case err
2408             (progn
2409               (setq session (elmo-imap4-get-session folder)
2410                     mailbox (elmo-imap4-folder-mailbox-internal folder)
2411                     tag (elmo-imap4-send-command session
2412                                                  (list "select "
2413                                                        (elmo-imap4-mailbox
2414                                                         mailbox))))
2415               (message "Selecting %s..."
2416                        (elmo-folder-name-internal folder))
2417               (if load-msgdb
2418                   (setq msgdb (elmo-msgdb-load folder 'silent)))
2419               (elmo-folder-set-killed-list-internal
2420                folder
2421                (elmo-msgdb-killed-list-load (elmo-folder-msgdb-path folder)))
2422               (if (setq result (elmo-imap4-response-ok-p
2423                                 (setq response
2424                                       (elmo-imap4-read-response session tag))))
2425                   (progn
2426                     (elmo-imap4-session-set-current-mailbox-internal
2427                      session mailbox)
2428                     (elmo-imap4-session-set-read-only-internal
2429                      session
2430                      (nth 1 (assq 'read-only (assq 'ok response)))))
2431                 (elmo-imap4-session-set-current-mailbox-internal session nil)
2432                 (if (elmo-imap4-response-bye-p response)
2433                     (elmo-imap4-process-bye session)
2434                   (error (or
2435                           (elmo-imap4-response-error-text response)
2436                           (format "Select %s failed" mailbox)))))
2437               (message "Selecting %s...done"
2438                        (elmo-folder-name-internal folder))
2439               (elmo-folder-set-msgdb-internal
2440                folder msgdb))
2441           (quit
2442            (if (elmo-imap4-response-ok-p response)
2443                (elmo-imap4-session-set-current-mailbox-internal
2444                 session mailbox)
2445              (and session
2446                   (elmo-imap4-session-set-current-mailbox-internal
2447                    session nil))))
2448           (error
2449            (if (elmo-imap4-response-ok-p response)
2450                (elmo-imap4-session-set-current-mailbox-internal
2451                 session mailbox)
2452              (and session
2453                   (elmo-imap4-session-set-current-mailbox-internal
2454                    session nil))))))
2455     (luna-call-next-method)))
2456
2457 ;; elmo-folder-open-internal: do nothing.
2458
2459 (luna-define-method elmo-find-fetch-strategy
2460   ((folder elmo-imap4-folder) entity &optional ignore-cache)
2461   (let ((number (elmo-msgdb-overview-entity-get-number entity))
2462         cache-file size message-id)
2463     (setq size (elmo-msgdb-overview-entity-get-size entity))
2464     (setq message-id (elmo-msgdb-overview-entity-get-id entity))
2465     (setq cache-file (elmo-file-cache-get message-id))
2466     (if (or ignore-cache
2467             (null (elmo-file-cache-status cache-file)))
2468         (if (and elmo-message-fetch-threshold
2469                  (integerp size)
2470                  (>= size elmo-message-fetch-threshold)
2471                  (or (not elmo-message-fetch-confirm)
2472                      (not (prog1 (y-or-n-p
2473                                   (format
2474                                    "Fetch entire message at once? (%dbytes)"
2475                                    size))
2476                             (message "")))))
2477             ;; Fetch message as imap message.
2478             (elmo-make-fetch-strategy 'section
2479                                       nil
2480                                       (elmo-message-use-cache-p
2481                                        folder number)
2482                                       (elmo-file-cache-path
2483                                        cache-file))
2484           ;; Don't use existing cache and fetch entire message at once.
2485           (elmo-make-fetch-strategy 'entire nil
2486                                     (elmo-message-use-cache-p
2487                                      folder number)
2488                                     (elmo-file-cache-path cache-file)))
2489       ;; Cache found and use it.
2490       (if (not ignore-cache)
2491           (if (eq (elmo-file-cache-status cache-file) 'section)
2492               ;; Fetch message with imap message.
2493               (elmo-make-fetch-strategy 'section
2494                                         t
2495                                         (elmo-message-use-cache-p
2496                                          folder number)
2497                                         (elmo-file-cache-path
2498                                          cache-file))
2499             (elmo-make-fetch-strategy 'entire
2500                                       t
2501                                       (elmo-message-use-cache-p
2502                                        folder number)
2503                                       (elmo-file-cache-path
2504                                        cache-file)))))))
2505
2506 (luna-define-method elmo-folder-create-plugged ((folder elmo-imap4-folder))
2507   (elmo-imap4-send-command-wait
2508    (elmo-imap4-get-session folder)
2509    (list "create "
2510          (elmo-imap4-mailbox
2511           (elmo-imap4-folder-mailbox-internal folder)))))
2512
2513 (luna-define-method elmo-folder-append-buffer
2514   ((folder elmo-imap4-folder) unread &optional number)
2515   (if (elmo-folder-plugged-p folder)
2516       (let ((session (elmo-imap4-get-session folder))
2517             send-buffer result)
2518         (elmo-imap4-session-select-mailbox session
2519                                            (elmo-imap4-folder-mailbox-internal
2520                                             folder))
2521         (setq send-buffer (elmo-imap4-setup-send-buffer))
2522         (unwind-protect
2523             (setq result
2524                   (elmo-imap4-send-command-wait
2525                    session
2526                    (list
2527                     "append "
2528                     (elmo-imap4-mailbox (elmo-imap4-folder-mailbox-internal
2529                                          folder))
2530                     (if unread " () " " (\\Seen) ")
2531                     (elmo-imap4-buffer-literal send-buffer))))
2532           (kill-buffer send-buffer))
2533         result)
2534     ;; Unplugged
2535     (if elmo-enable-disconnected-operation
2536         (elmo-folder-append-buffer-dop folder unread number)
2537       (error "Unplugged"))))
2538
2539 (eval-when-compile
2540   (defmacro elmo-imap4-identical-system-p (folder1 folder2)
2541     "Return t if FOLDER1 and FOLDER2 are in the same IMAP4 system."
2542     (` (and (string= (elmo-net-folder-server-internal (, folder1))
2543                      (elmo-net-folder-server-internal (, folder2)))
2544             (eq (elmo-net-folder-port-internal (, folder1))
2545                 (elmo-net-folder-port-internal (, folder2)))
2546             (string= (elmo-net-folder-user-internal (, folder1))
2547                      (elmo-net-folder-user-internal (, folder2)))))))
2548
2549 (luna-define-method elmo-folder-append-messages :around
2550   ((folder elmo-imap4-folder) src-folder numbers &optional same-number)
2551   (if (and (eq (elmo-folder-type-internal src-folder) 'imap4)
2552            (elmo-imap4-identical-system-p folder src-folder)
2553            (elmo-folder-plugged-p folder))
2554       ;; Plugged
2555       (prog1
2556           (elmo-imap4-copy-messages src-folder folder numbers)
2557         (elmo-progress-notify 'elmo-folder-move-messages (length numbers)))
2558     (luna-call-next-method)))
2559
2560 (luna-define-method elmo-message-deletable-p ((folder elmo-imap4-folder)
2561                                               number)
2562   (if (elmo-folder-plugged-p folder)
2563       (not (elmo-imap4-session-read-only-internal
2564             (elmo-imap4-get-session folder)))
2565     elmo-enable-disconnected-operation)) ; offline refile.
2566
2567 ;(luna-define-method elmo-message-fetch-unplugged
2568 ;  ((folder elmo-imap4-folder)
2569 ;   number strategy  &optional section outbuf unseen)
2570 ;  (error "%d%s is not cached." number (if section
2571 ;                                         (format "(%s)" section)
2572 ;                                       "")))
2573
2574 (defsubst elmo-imap4-message-fetch (folder number strategy
2575                                            section outbuf unseen)
2576   (let ((session (elmo-imap4-get-session folder))
2577         response)
2578     (elmo-imap4-session-select-mailbox session
2579                                        (elmo-imap4-folder-mailbox-internal
2580                                         folder))
2581     (with-current-buffer (elmo-network-session-buffer session)
2582       (setq elmo-imap4-fetch-callback nil)
2583       (setq elmo-imap4-fetch-callback-data nil))
2584     (unless elmo-inhibit-display-retrieval-progress
2585       (setq elmo-imap4-display-literal-progress t))
2586     (unwind-protect
2587         (setq response
2588               (elmo-imap4-send-command-wait session
2589                                             (format
2590                                              (if elmo-imap4-use-uid
2591                                                  "uid fetch %s body%s[%s]"
2592                                                "fetch %s body%s[%s]")
2593                                              number
2594                                              (if unseen ".peek" "")
2595                                              (or section "")
2596                                              )))
2597       (setq elmo-imap4-display-literal-progress nil))
2598     (unless elmo-inhibit-display-retrieval-progress
2599       (elmo-display-progress 'elmo-imap4-display-literal-progress
2600                              "Retrieving..." 100)  ; remove progress bar.
2601       (message "Retrieving...done."))
2602     (if (setq response (elmo-imap4-response-bodydetail-text
2603                         (elmo-imap4-response-value-all
2604                          response 'fetch)))
2605         (with-current-buffer outbuf
2606           (erase-buffer)
2607           (insert response)
2608           t))))
2609
2610 (luna-define-method elmo-message-fetch-plugged ((folder elmo-imap4-folder)
2611                                                 number strategy
2612                                                 &optional section
2613                                                 outbuf unseen)
2614   (elmo-imap4-message-fetch folder number strategy section outbuf unseen))
2615
2616 (luna-define-method elmo-message-fetch-field ((folder elmo-imap4-folder)
2617                                               number field)
2618   (let ((session (elmo-imap4-get-session folder)))
2619     (elmo-imap4-session-select-mailbox session
2620                                        (elmo-imap4-folder-mailbox-internal
2621                                         folder))
2622     (with-current-buffer (elmo-network-session-buffer session)
2623       (setq elmo-imap4-fetch-callback nil)
2624       (setq elmo-imap4-fetch-callback-data nil))
2625     (with-temp-buffer
2626       (insert
2627        (elmo-imap4-response-bodydetail-text
2628         (elmo-imap4-response-value
2629          (elmo-imap4-send-command-wait session
2630                                        (concat
2631                                         (if elmo-imap4-use-uid
2632                                             "uid ")
2633                                         (format
2634                                          "fetch %s (body.peek[header.fields (%s)])"
2635                                          number field)))
2636          'fetch)))
2637       (elmo-delete-cr-buffer)
2638       (goto-char (point-min))
2639       (std11-field-body (symbol-name field)))))
2640
2641 (luna-define-method elmo-folder-search-requires-msgdb-p ((folder
2642                                                           elmo-imap4-folder)
2643                                                          condition)
2644   nil)
2645
2646 (require 'product)
2647 (product-provide (provide 'elmo-imap4) (require 'elmo-version))
2648
2649 ;;; elmo-imap4.el ends here