Move ';;; Code:' comment.
[elisp/wanderlust.git] / elmo / elmo-imap4.el
index c3b88af..6bd10f5 100644 (file)
@@ -38,6 +38,7 @@
 ;;    Author: Simon Josefsson <jas@pdc.kth.se>
 ;;
 
+;;; Code:
 (require 'elmo-vars)
 (require 'elmo-util)
 (require 'elmo-date)
@@ -48,7 +49,6 @@
 (require 'utf7)
 (require 'elmo-mime)
 
-;;; Code:
 (eval-when-compile (require 'cl))
 
 (defvar elmo-imap4-disuse-server-flag-mailbox-regexp "^#mh" ; UW imapd
@@ -174,6 +174,11 @@ REGEXP should have a grouping for namespace prefix.")
                                  (personal "$Personal")
                                  (shouldreply "$ShouldReply")))
 
+(defconst elmo-imap4-folder-name-syntax
+  `(mailbox
+    (?: [user "^[A-Za-z]"] (?/ [auth ".+"]))
+    ,@elmo-net-folder-name-syntax))
+
 ;; For debugging.
 (defvar elmo-imap4-debug nil
   "Non-nil forces IMAP4 folder as debug mode.
@@ -193,6 +198,9 @@ Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
                     (capability current-mailbox read-only flags))
   (luna-define-internal-accessors 'elmo-imap4-session))
 
+(defmacro elmo-imap4-session-capable-p (session capability)
+  `(memq ,capability (elmo-imap4-session-capability-internal ,session)))
+
 ;;; MIME-ELMO-IMAP Location
 (eval-and-compile
   (luna-define-class mime-elmo-imap-location
@@ -202,8 +210,8 @@ Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
 
 ;;; Debug
 (defmacro elmo-imap4-debug (message &rest args)
-  (` (if elmo-imap4-debug
-        (elmo-imap4-debug-1 (, message) (,@ args)))))
+  `(if elmo-imap4-debug
+       (elmo-imap4-debug-1 ,message ,@args)))
 
 (defun elmo-imap4-debug-1 (message &rest args)
   (with-current-buffer (get-buffer-create "*IMAP4 DEBUG*")
@@ -226,23 +234,23 @@ Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
 
 (defmacro elmo-imap4-response-continue-req-p (response)
   "Returns non-nil if RESPONSE is '+' response."
-  (` (assq 'continue-req (, response))))
+  `(assq 'continue-req ,response))
 
 (defmacro elmo-imap4-response-ok-p (response)
   "Returns non-nil if RESPONSE is an 'OK' response."
-  (` (assq 'ok (, response))))
+  `(assq 'ok ,response))
 
 (defmacro elmo-imap4-response-bye-p (response)
   "Returns non-nil if RESPONSE is an 'BYE' response."
-  (` (assq 'bye (, response))))
+  `(assq 'bye ,response))
 
 (defmacro elmo-imap4-response-garbage-p (response)
   "Returns non-nil if RESPONSE is an 'garbage' response."
-  (` (assq 'garbage (, response))))
+  `(assq 'garbage ,response))
 
 (defmacro elmo-imap4-response-value (response symbol)
   "Get value of the SYMBOL from RESPONSE."
-  (` (nth 1 (assq (, symbol) (, response)))))
+  `(nth 1 (assq ,symbol ,response)))
 
 (defsubst elmo-imap4-response-value-all (response symbol)
   "Get all value of the SYMBOL from RESPONSE."
@@ -255,13 +263,13 @@ Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
 
 (defmacro elmo-imap4-response-error-text (response)
   "Returns text of NO, BAD, BYE response."
-  (` (nth 1 (or (elmo-imap4-response-value (, response) 'no)
-               (elmo-imap4-response-value (, response) 'bad)
-               (elmo-imap4-response-value (, response) 'bye)))))
+  `(nth 1 (or (elmo-imap4-response-value ,response 'no)
+             (elmo-imap4-response-value ,response 'bad)
+             (elmo-imap4-response-value ,response 'bye))))
 
 (defmacro elmo-imap4-response-bodydetail-text (response)
   "Returns text of BODY[section]<partial>."
-  (` (nth 3 (assq 'bodydetail (, response)))))
+  `(nth 3 (assq 'bodydetail ,response)))
 
 ;;; Session commands.
 
@@ -319,12 +327,20 @@ Returns a TAG string which is assigned to the COMMAND."
                                    cmdstr
                                    (elmo-imap4-format-quoted (nth 1 token)))))
                     ((eq kind 'literal)
-                     (setq cmdstr (concat cmdstr
-                                          (format "{%d}" (nth 2 token))))
-                     (process-send-string process cmdstr)
-                     (process-send-string process "\r\n")
-                     (setq cmdstr nil)
-                     (elmo-imap4-accept-continue-req session)
+                     (if (elmo-imap4-session-capable-p session 'literal+)
+                         ;; rfc2088
+                         (progn
+                           (setq cmdstr (concat cmdstr
+                                                (format "{%d+}" (nth 2 token))))
+                           (process-send-string process cmdstr)
+                           (process-send-string process "\r\n")
+                           (setq cmdstr nil))
+                       (setq cmdstr (concat cmdstr
+                                            (format "{%d}" (nth 2 token))))
+                       (process-send-string process cmdstr)
+                       (process-send-string process "\r\n")
+                       (setq cmdstr nil)
+                       (elmo-imap4-accept-continue-req session))
                      (cond ((stringp (nth 1 token))
                             (setq cmdstr (nth 1 token)))
                            ((bufferp (nth 1 token))
@@ -912,7 +928,8 @@ If CHOP-LENGTH is not specified, message set is not chopped."
        (elmo-imap4-response-value element 'uid)
        :size (elmo-imap4-response-value element 'rfc822size)))
      (elmo-imap4-response-value element 'flags)
-     app-data)))
+     app-data)
+    (elmo-progress-notify 'elmo-folder-msgdb-create)))
 
 (defun elmo-imap4-parse-capability (string)
   (if (string-match "^\\*\\(.*\\)$" string)
@@ -920,6 +937,8 @@ If CHOP-LENGTH is not specified, message set is not chopped."
        (concat "(" (downcase (elmo-match-string 1 string)) ")"))))
 
 (defun elmo-imap4-clear-login (session)
+  (when (elmo-imap4-session-capable-p session 'logindisabled)
+    (signal 'elmo-authenticate-error '(elmo-imap4-clear-login)))
   (let ((elmo-imap4-debug-inhibit-logging t))
     (or
      (elmo-imap4-read-ok
@@ -966,8 +985,8 @@ If CHOP-LENGTH is not specified, message set is not chopped."
       ;; Skip garbage output from process before greeting.
       (while (and (memq (process-status process) '(open run))
                  (goto-char (point-max))
-                 (forward-line -1)
-                 (not (elmo-imap4-parse-greeting)))
+                 (or (/= (forward-line -1) 0)
+                     (not (elmo-imap4-parse-greeting))))
        (accept-process-output process 1))
       (erase-buffer)
       (set-process-filter process 'elmo-imap4-arrival-filter)
@@ -988,8 +1007,7 @@ If CHOP-LENGTH is not specified, message set is not chopped."
       (when (eq (elmo-network-stream-type-symbol
                 (elmo-network-session-stream-type-internal session))
                'starttls)
-       (or (memq 'starttls
-                 (elmo-imap4-session-capability-internal session))
+       (or (elmo-imap4-session-capable-p session 'starttls)
            (signal 'elmo-open-error
                    '(elmo-imap4-starttls-error)))
        (elmo-imap4-send-command-wait session "starttls")
@@ -1107,7 +1125,7 @@ If CHOP-LENGTH is not specified, message set is not chopped."
 (luna-define-method elmo-network-setup-session ((session
                                                 elmo-imap4-session))
   (with-current-buffer (elmo-network-session-buffer session)
-    (when (memq 'namespace (elmo-imap4-session-capability-internal session))
+    (when (elmo-imap4-session-capable-p session 'namespace)
       (setq elmo-imap4-server-namespace
            (elmo-imap4-response-value
             (elmo-imap4-send-command-wait session "namespace")
@@ -1219,7 +1237,7 @@ If CHOP-LENGTH is not specified, message set is not chopped."
 (defvar elmo-imap4-client-eol "\r\n"
   "The EOL string we send to the server.")
 
-(defvar elmo-imap4-display-literal-progress nil)
+(defvar elmo-imap4-literal-progress-reporter nil)
 
 (defun elmo-imap4-find-next-line ()
   "Return point at end of current line, taking into account literals.
@@ -1230,16 +1248,11 @@ Return nil if no complete line has arrived."
     (if (match-string 1)
        (if (< (point-max) (+ (point) (string-to-number (match-string 1))))
            (progn
-             (if (and elmo-imap4-display-literal-progress
-                      (> (string-to-number (match-string 1))
-                         (min elmo-display-retrieval-progress-threshold 100)))
-                 (elmo-display-progress
-                  'elmo-imap4-display-literal-progress
-                  (format "Retrieving (%d/%d bytes)..."
-                          (- (point-max) (point))
-                          (string-to-number (match-string 1)))
-                  (/ (- (point-max) (point))
-                     (/ (string-to-number (match-string 1)) 100))))
+             (when elmo-imap4-literal-progress-reporter
+               (elmo-progress-notify
+                'elmo-retrieve-message
+                :set (- (point-max) (point))
+                :total (string-to-number (match-string 1))))
              nil)
          (goto-char (+ (point) (string-to-number (match-string 1))))
          (elmo-imap4-find-next-line))
@@ -1263,22 +1276,19 @@ Return nil if no complete line has arrived."
          (delete-backward-char (length elmo-imap4-server-eol))
          (goto-char (point-min))
          (unwind-protect
-             (cond ((eq elmo-imap4-status 'initial)
-                    (setq elmo-imap4-current-response
-                          (list
-                           (list 'greeting (elmo-imap4-parse-greeting)))))
-                   ((or (eq elmo-imap4-status 'auth)
-                        (eq elmo-imap4-status 'nonauth)
-                        (eq elmo-imap4-status 'selected)
-                        (eq elmo-imap4-status 'examine))
-                    (setq elmo-imap4-current-response
-                          (cons
-                           (elmo-imap4-parse-response)
-                           elmo-imap4-current-response)))
-                   (t
-                    (message "Unknown state %s in arrival filter"
-                             elmo-imap4-status))))
-         (delete-region (point-min) (point-max))))))))
+             (case elmo-imap4-status
+               (initial
+                (setq elmo-imap4-current-response
+                      (list
+                       (list 'greeting (elmo-imap4-parse-greeting)))))
+               ((auth nonauth selected examine)
+                (setq elmo-imap4-current-response
+                      (cons (elmo-imap4-parse-response)
+                            elmo-imap4-current-response)))
+               (t
+                (message "Unknown state %s in arrival filter"
+                         elmo-imap4-status)))
+           (delete-region (point-min) (point-max)))))))))
 
 ;; IMAP parser.
 
@@ -1620,12 +1630,13 @@ Return nil if no complete line has arrived."
 
 
 (defmacro elmo-imap4-value (value)
-  (` (if (eq (, value) 'NIL) nil
-       (, value))))
+  `(if (eq ,value 'NIL)
+       nil
+     ,value))
 
 (defmacro elmo-imap4-nth (pos list)
-  (` (let ((value (nth (, pos) (, list))))
-       (elmo-imap4-value value))))
+  `(let ((value (nth ,pos ,list)))
+     (elmo-imap4-value value)))
 
 (defun elmo-imap4-parse-namespace ()
   (list 'namespace
@@ -1836,9 +1847,7 @@ Return nil if no complete line has arrived."
        (elmo-imap4-forward)
        (nreverse body)))))
 
-(luna-define-method elmo-folder-initialize :around ((folder
-                                                    elmo-imap4-folder)
-                                                   name)
+(luna-define-method elmo-folder-initialize ((folder elmo-imap4-folder) name)
   (let ((default-user  elmo-imap4-default-user)
        (default-server elmo-imap4-default-server)
        (default-port   elmo-imap4-default-port)
@@ -1847,39 +1856,38 @@ Return nil if no complete line has arrived."
             (append elmo-imap4-stream-type-alist
                     elmo-network-stream-type-alist)
           elmo-network-stream-type-alist))
-       parse)
+       tokens)
     (when (string-match "\\(.*\\)@\\(.*\\)" default-server)
       ;; case: imap4-default-server is specified like
       ;; "hoge%imap.server@gateway".
       (setq default-user (elmo-match-string 1 default-server))
       (setq default-server (elmo-match-string 2 default-server)))
-    (setq name (luna-call-next-method))
+    (setq tokens (car (elmo-parse-separated-tokens
+                      name
+                      elmo-imap4-folder-name-syntax)))
     ;; mailbox
-    (setq parse (elmo-parse-token name ":"))
     (elmo-imap4-folder-set-mailbox-internal folder
                                            (elmo-imap4-encode-folder-string
-                                            (car parse)))
+                                            (cdr (assq 'mailbox tokens))))
     ;; user
-    (setq parse (elmo-parse-prefixed-element ?: (cdr parse) "/"))
     (elmo-net-folder-set-user-internal folder
-                                      (if (eq (length (car parse)) 0)
-                                          default-user
-                                        (car parse)))
+                                      (or (cdr (assq 'user tokens))
+                                          default-user))
     ;; auth
-    (setq parse (elmo-parse-prefixed-element ?/ (cdr parse)))
     (elmo-net-folder-set-auth-internal
      folder
-     (if (eq (length (car parse)) 0)
-        (or elmo-imap4-default-authenticate-type 'clear)
-       (intern (car parse))))
-    (unless (elmo-net-folder-server-internal folder)
-      (elmo-net-folder-set-server-internal folder default-server))
-    (unless (elmo-net-folder-port-internal folder)
-      (elmo-net-folder-set-port-internal folder default-port))
-    (unless (elmo-net-folder-stream-type-internal folder)
-      (elmo-net-folder-set-stream-type-internal
-       folder
-       (elmo-get-network-stream-type elmo-imap4-default-stream-type)))
+     (let ((auth (cdr (assq 'auth tokens))))
+       (or (and auth (intern auth))
+          elmo-imap4-default-authenticate-type
+          'clear)))
+    ;; network
+    (elmo-net-folder-set-parameters
+     folder
+     tokens
+     (list :server     default-server
+          :port        default-port
+          :stream-type
+          (elmo-get-network-stream-type elmo-imap4-default-stream-type)))
     folder))
 
 ;;; ELMO IMAP4 folder
@@ -1935,15 +1943,17 @@ Return nil if no complete line has arrived."
                                                       &optional
                                                       enable-killed)
   (elmo-imap4-list folder
-                  (let ((killed
-                         (elmo-folder-killed-list-internal
-                          folder)))
-                    (if (and killed
-                             (eq (length killed) 1)
-                             (consp (car killed))
-                             (eq (car (car killed)) 1))
-                        (format "uid %d:*" (cdr (car killed)))
-                      "all"))))
+                  (concat
+                   (let ((killed
+                          (elmo-folder-killed-list-internal
+                           folder)))
+                     (if (and killed
+                              (eq (length killed) 1)
+                              (consp (car killed))
+                              (eq (car (car killed)) 1))
+                         (format "uid %d:*" (cdr (car killed)))
+                       "all"))
+                   " undeleted")))
 
 (luna-define-method elmo-folder-list-flagged-plugged
   ((folder elmo-imap4-folder) flag)
@@ -1991,7 +2001,10 @@ Return nil if no complete line has arrived."
                            elmo-imap4-default-user))
              (not (eq (elmo-net-folder-auth-internal folder)
                       (or elmo-imap4-default-authenticate-type 'clear))))
-      (setq append-serv (concat ":" (elmo-net-folder-user-internal folder))))
+      (setq append-serv (concat ":"
+                               (elmo-quote-syntactical-element
+                                (elmo-net-folder-user-internal folder)
+                                'user elmo-imap4-folder-name-syntax))))
     (unless (eq (elmo-net-folder-auth-internal folder)
                (or elmo-imap4-default-authenticate-type 'clear))
       (setq append-serv
@@ -2024,13 +2037,13 @@ Return nil if no complete line has arrived."
                           root)))
            (setq root (concat root delim)))
          (while (setq folder (car result))
-           (when (string-match
-                  (concat "^\\(" (regexp-quote root) "[^" re-delim "]" "+\\)"
-                          re-delim)
-                  folder)
-             (setq folder (match-string 1 folder)))
-           (setq has-child-p nil
-                 result (delq
+           (setq has-child-p
+                 (when (string-match
+                        (concat "^\\(" (regexp-quote root) "[^" re-delim "]" "+\\)"
+                                re-delim)
+                        folder)
+                   (setq folder (match-string 1 folder))))
+           (setq result (delq
                          nil
                          (mapcar (lambda (fld)
                                    (if (string-match
@@ -2041,7 +2054,9 @@ Return nil if no complete line has arrived."
                                      fld))
                                  (cdr result)))
                  folder (concat prefix
-                                (elmo-imap4-decode-folder-string folder)
+                                (elmo-quote-syntactical-element
+                                 (elmo-imap4-decode-folder-string folder)
+                                 'mailbox elmo-imap4-folder-name-syntax)
                                 (and append-serv
                                      (eval append-serv)))
                  ret (append ret (if has-child-p
@@ -2049,7 +2064,10 @@ Return nil if no complete line has arrived."
                                    (list folder)))))
          ret)
       (mapcar (lambda (fld)
-               (concat prefix (elmo-imap4-decode-folder-string fld)
+               (concat prefix
+                       (elmo-quote-syntactical-element
+                        (elmo-imap4-decode-folder-string fld)
+                        'mailbox elmo-imap4-folder-name-syntax)
                        (and append-serv
                             (eval append-serv))))
              result))))
@@ -2072,8 +2090,9 @@ Return nil if no complete line has arrived."
   t)
 
 (luna-define-method elmo-folder-delete ((folder elmo-imap4-folder))
-  (let ((msgs (and (elmo-folder-exists-p folder)
-                  (elmo-folder-list-messages folder))))
+  (let* ((exists (elmo-folder-exists-p folder))
+        (msgs (and exists
+                   (elmo-folder-list-messages folder))))
     (when (yes-or-no-p (format "%sDelete msgdb and substance of \"%s\"? "
                               (if (> (length msgs) 0)
                                   (format "%d msg(s) exists. " (length msgs))
@@ -2082,7 +2101,9 @@ Return nil if no complete line has arrived."
       (let ((session (elmo-imap4-get-session folder)))
        (when (elmo-imap4-folder-mailbox-internal folder)
          (when msgs (elmo-folder-delete-messages-internal folder msgs))
-         (elmo-imap4-send-command-wait session "close")
+         ;; close selected mailbox except one with \Noselect attribute
+         (when exists
+           (elmo-imap4-send-command-wait session "close"))
          (elmo-imap4-send-command-wait
           session
           (list "delete "
@@ -2174,18 +2195,24 @@ If optional argument REMOVE is non-nil, remove FLAG."
 
 (luna-define-method elmo-folder-delete-messages-plugged
   ((folder elmo-imap4-folder) numbers)
-  (let ((session (elmo-imap4-get-session folder)))
+  (let ((session (elmo-imap4-get-session folder))
+       (expunge
+        (or (null (elmo-imap4-list folder "deleted"))
+            (y-or-n-p
+             "There's hidden deleted messages, expunge anyway?"))))
     (elmo-imap4-session-select-mailbox
      session
      (elmo-imap4-folder-mailbox-internal folder))
     (unless (elmo-imap4-set-flag folder numbers "\\Deleted")
       (error "Failed to set deleted flag"))
-    (elmo-imap4-send-command session "expunge")))
+    (when expunge
+      (elmo-imap4-send-command session "expunge"))
+    t))
 
 (defmacro elmo-imap4-detect-search-charset (string)
-  (` (with-temp-buffer
-       (insert (, string))
-       (detect-mime-charset-region (point-min) (point-max)))))
+  `(with-temp-buffer
+     (insert ,string)
+     (detect-mime-charset-region (point-min) (point-max))))
 
 (defun elmo-imap4-search-internal-primitive (folder session filter from-msgs)
   (let ((search-key (elmo-filter-key filter))
@@ -2194,17 +2221,16 @@ If optional argument REMOVE is non-nil, remove FLAG."
        (total 0)
        (length (length from-msgs))
        charset set-list end results)
-    (message "Searching...")
     (cond
      ((string= "last" search-key)
       (let ((numbers (or from-msgs (elmo-folder-list-messages folder))))
        (nthcdr (max (- (length numbers)
-                       (string-to-int (elmo-filter-value filter)))
+                       (string-to-number (elmo-filter-value filter)))
                     0)
                numbers)))
      ((string= "first" search-key)
       (let* ((numbers (or from-msgs (elmo-folder-list-messages folder)))
-            (rest (nthcdr (string-to-int (elmo-filter-value filter) )
+            (rest (nthcdr (string-to-number (elmo-filter-value filter) )
                           numbers)))
        (mapcar '(lambda (x) (delete x numbers)) rest)
        numbers))
@@ -2243,11 +2269,6 @@ If optional argument REMOVE is non-nil, remove FLAG."
                   (elmo-date-get-datevec
                    (elmo-filter-value filter)))))
                'search)))
-       (when (> length elmo-display-progress-threshold)
-         (setq total (+ total (car (car set-list))))
-         (elmo-display-progress
-          'elmo-imap4-search "Searching..."
-          (/ (* total 100) length)))
        (setq set-list (cdr set-list)
              end (null set-list)))
       results)
@@ -2295,11 +2316,6 @@ If optional argument REMOVE is non-nil, remove FLAG."
                   (encode-mime-charset-string
                    (elmo-filter-value filter) charset))))
                'search)))
-       (when (> length elmo-display-progress-threshold)
-         (setq total (+ total (car (car set-list))))
-         (elmo-display-progress
-          'elmo-imap4-search "Searching..."
-          (/ (* total 100) length)))
        (setq set-list (cdr set-list)
              end (null set-list)))
       results))))
@@ -2330,11 +2346,15 @@ If optional argument REMOVE is non-nil, remove FLAG."
                                                condition &optional numbers)
   (if (elmo-folder-plugged-p folder)
       (save-excursion
-       (let ((session (elmo-imap4-get-session folder)))
+       (let ((session (elmo-imap4-get-session folder))
+             ret)
+         (message "Searching...")
          (elmo-imap4-session-select-mailbox
           session
           (elmo-imap4-folder-mailbox-internal folder))
-         (elmo-imap4-search-internal folder session condition numbers)))
+         (setq ret (elmo-imap4-search-internal folder session condition numbers))
+         (message "Searching...done")
+         ret))
     (luna-call-next-method)))
 
 (luna-define-method elmo-folder-msgdb-create-plugged
@@ -2342,58 +2362,51 @@ If optional argument REMOVE is non-nil, remove FLAG."
   (when numbers
     (let ((session (elmo-imap4-get-session folder))
          (headers
-          (append
-           '("Subject" "From" "To" "Cc" "Date"
-             "Message-Id" "References" "In-Reply-To")
-           elmo-msgdb-extra-fields))
+          (elmo-uniq-list
+           (append
+            '("Subject" "From" "To" "Cc" "Date"
+              "Message-Id" "References" "In-Reply-To")
+            (mapcar #'capitalize (elmo-msgdb-extra-fields 'non-virtual)))))
          (total 0)
-         (length (length numbers))
          print-length print-depth
          rfc2060 set-list)
-      (setq rfc2060 (memq 'imap4rev1
-                         (elmo-imap4-session-capability-internal
-                          session)))
-      (message "Getting overview...")
-      (elmo-imap4-session-select-mailbox
-       session (elmo-imap4-folder-mailbox-internal folder))
-      (setq set-list (elmo-imap4-make-number-set-list
-                     numbers
-                     elmo-imap4-overview-fetch-chop-length))
-      ;; Setup callback.
-      (with-current-buffer (elmo-network-session-buffer session)
-       (setq elmo-imap4-current-msgdb (elmo-make-msgdb)
-             elmo-imap4-seen-messages nil
-             elmo-imap4-fetch-callback 'elmo-imap4-fetch-callback-1
-             elmo-imap4-fetch-callback-data (cons flag-table folder))
-       (while set-list
-         (elmo-imap4-send-command-wait
-          session
-          ;; get overview entity from IMAP4
-          (format "%sfetch %s (%s rfc822.size flags)"
-                  (if elmo-imap4-use-uid "uid " "")
-                  (cdr (car set-list))
-                  (if rfc2060
-                      (format "body.peek[header.fields %s]" headers)
-                    (format "%s" headers))))
-         (when (> length elmo-display-progress-threshold)
-           (setq total (+ total (car (car set-list))))
-           (elmo-display-progress
-            'elmo-imap4-msgdb-create "Getting overview..."
-            (/ (* total 100) length)))
-         (setq set-list (cdr set-list)))
-       (message "Getting overview...done")
-       (when elmo-imap4-seen-messages
-         (elmo-imap4-set-flag folder elmo-imap4-seen-messages "\\Seen"))
-       ;; cannot setup the global flag while retrieval.
-       (dolist (number (elmo-msgdb-list-messages elmo-imap4-current-msgdb))
-         (elmo-global-flags-set (elmo-msgdb-flags elmo-imap4-current-msgdb
-                                                  number)
-                                folder number
-                                (elmo-message-entity-field
-                                 (elmo-msgdb-message-entity
-                                  elmo-imap4-current-msgdb number)
-                                 'message-id)))
-       elmo-imap4-current-msgdb))))
+      (setq rfc2060 (elmo-imap4-session-capable-p session 'imap4rev1))
+      (elmo-with-progress-display (elmo-folder-msgdb-create (length numbers))
+         "Creating msgdb"
+       (elmo-imap4-session-select-mailbox
+        session (elmo-imap4-folder-mailbox-internal folder))
+       (setq set-list (elmo-imap4-make-number-set-list
+                       numbers
+                       elmo-imap4-overview-fetch-chop-length))
+       ;; Setup callback.
+       (with-current-buffer (elmo-network-session-buffer session)
+         (setq elmo-imap4-current-msgdb (elmo-make-msgdb)
+               elmo-imap4-seen-messages nil
+               elmo-imap4-fetch-callback 'elmo-imap4-fetch-callback-1
+               elmo-imap4-fetch-callback-data (cons flag-table folder))
+         (while set-list
+           (elmo-imap4-send-command-wait
+            session
+            ;; get overview entity from IMAP4
+            (format "%sfetch %s (%s rfc822.size flags)"
+                    (if elmo-imap4-use-uid "uid " "")
+                    (cdr (car set-list))
+                    (if rfc2060
+                        (format "body.peek[header.fields %s]" headers)
+                      (format "%s" headers))))
+           (setq set-list (cdr set-list)))
+         (when elmo-imap4-seen-messages
+           (elmo-imap4-set-flag folder elmo-imap4-seen-messages "\\Seen"))
+         ;; cannot setup the global flag while retrieval.
+         (dolist (number (elmo-msgdb-list-messages elmo-imap4-current-msgdb))
+           (elmo-global-flags-set (elmo-msgdb-flags elmo-imap4-current-msgdb
+                                                    number)
+                                  folder number
+                                  (elmo-message-entity-field
+                                   (elmo-msgdb-message-entity
+                                    elmo-imap4-current-msgdb number)
+                                   'message-id)))
+         elmo-imap4-current-msgdb)))))
 
 (luna-define-method elmo-folder-set-flag-plugged ((folder elmo-imap4-folder)
                                                  numbers flag)
@@ -2582,13 +2595,14 @@ If optional argument REMOVE is non-nil, remove FLAG."
 
 (defun elmo-imap4-flags-to-imap (flags)
   "Convert FLAGS to the IMAP flag string."
-  (let ((imap-flag (if (not (memq 'unread flags)) "\\Seen"))
-       (flags (delq 'read (delq 'cached (delq 'unread flags))))
-       spec)
+  (let ((imap-flag (if (not (memq 'unread flags)) "\\Seen")))
     (dolist (flag flags)
-      (setq imap-flag (concat imap-flag (if imap-flag " ")
-                             (or (car (cdr (assq flag elmo-imap4-flag-specs)))
-                                 (capitalize (symbol-name flag))))))
+      (unless (memq flag '(new read unread cached))
+       (setq imap-flag
+             (concat imap-flag
+                     (if imap-flag " ")
+                     (or (car (cdr (assq flag elmo-imap4-flag-specs)))
+                         (capitalize (symbol-name flag)))))))
     imap-flag))
 
 (luna-define-method elmo-folder-append-buffer
@@ -2625,12 +2639,12 @@ If optional argument REMOVE is non-nil, remove FLAG."
 (eval-when-compile
   (defmacro elmo-imap4-identical-system-p (folder1 folder2)
     "Return t if FOLDER1 and FOLDER2 are in the same IMAP4 system."
-    (` (and (string= (elmo-net-folder-server-internal (, folder1))
-                    (elmo-net-folder-server-internal (, folder2)))
-           (eq (elmo-net-folder-port-internal (, folder1))
-               (elmo-net-folder-port-internal (, folder2)))
-           (string= (elmo-net-folder-user-internal (, folder1))
-                    (elmo-net-folder-user-internal (, folder2)))))))
+    `(and (string= (elmo-net-folder-server-internal ,folder1)
+                  (elmo-net-folder-server-internal ,folder2))
+         (eq (elmo-net-folder-port-internal ,folder1)
+             (elmo-net-folder-port-internal ,folder2))
+         (string= (elmo-net-folder-user-internal ,folder1)
+                  (elmo-net-folder-user-internal ,folder2)))))
 
 (luna-define-method elmo-folder-next-message-number-plugged
   ((folder elmo-imap4-folder))
@@ -2654,16 +2668,18 @@ If optional argument REMOVE is non-nil, remove FLAG."
          response (elmo-imap4-response-value response 'status))
     (elmo-imap4-response-value response 'uidnext)))
 
-(luna-define-method elmo-folder-append-messages :around
-  ((folder elmo-imap4-folder) src-folder numbers &optional same-number)
-  (if (and (eq (elmo-folder-type-internal src-folder) 'imap4)
-          (elmo-imap4-identical-system-p folder src-folder)
-          (elmo-folder-plugged-p folder))
+(defun elmo-folder-append-messages-imap4-imap4 (dst-folder
+                                               src-folder
+                                               numbers
+                                               same-number)
+  (if (and (elmo-imap4-identical-system-p dst-folder src-folder)
+          (elmo-folder-plugged-p dst-folder))
       ;; Plugged
       (prog1
-         (elmo-imap4-copy-messages src-folder folder numbers)
+         (elmo-imap4-copy-messages src-folder dst-folder numbers)
        (elmo-progress-notify 'elmo-folder-move-messages (length numbers)))
-    (luna-call-next-method)))
+    (elmo-folder-append-messages dst-folder src-folder numbers same-number
+                                'elmo-folder-append-messages-imap4-imap4)))
 
 (luna-define-method elmo-message-deletable-p ((folder elmo-imap4-folder)
                                              number)
@@ -2689,24 +2705,19 @@ If optional argument REMOVE is non-nil, remove FLAG."
     (with-current-buffer (elmo-network-session-buffer session)
       (setq elmo-imap4-fetch-callback nil)
       (setq elmo-imap4-fetch-callback-data nil))
-    (unless elmo-inhibit-display-retrieval-progress
-      (setq elmo-imap4-display-literal-progress t))
-    (unwind-protect
-       (setq response
-             (elmo-imap4-send-command-wait session
-                                           (format
-                                            (if elmo-imap4-use-uid
-                                                "uid fetch %s body%s[%s]"
-                                              "fetch %s body%s[%s]")
-                                            number
-                                            (if unseen ".peek" "")
-                                            (or section "")
-                                            )))
-      (setq elmo-imap4-display-literal-progress nil))
-    (unless elmo-inhibit-display-retrieval-progress
-      (elmo-display-progress 'elmo-imap4-display-literal-progress
-                            "Retrieving..." 100)  ; remove progress bar.
-      (message "Retrieving...done"))
+    (elmo-with-progress-display (elmo-retrieve-message
+                                (elmo-message-field folder number :size)
+                                elmo-imap4-literal-progress-reporter)
+       "Retrieving"
+      (setq response
+           (elmo-imap4-send-command-wait session
+                                         (format
+                                          (if elmo-imap4-use-uid
+                                              "uid fetch %s body%s[%s]"
+                                            "fetch %s body%s[%s]")
+                                          number
+                                          (if unseen ".peek" "")
+                                          (or section "")))))
     (if (setq response (elmo-imap4-response-bodydetail-text
                        (elmo-imap4-response-value-all
                         response 'fetch)))