2005-06-17 [colin] 1.9.11cvs80
[claws.git] / src / mh.c
index 81f142e950ebc3f032c4779159c743f3cdc01480..4a799b5a4e6b81e722e0db0c570ef998bb9dffca 100644 (file)
--- a/src/mh.c
+++ b/src/mh.c
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2002 Hiroyuki Yamamoto
+ * Copyright (C) 1999-2005 Hiroyuki Yamamoto
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,6 +24,7 @@
 #include "defs.h"
 
 #include <glib.h>
+#include <glib/gi18n.h>
 #include <dirent.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #  include <sys/time.h>
 #endif
 
-#include "intl.h"
 #include "folder.h"
 #include "mh.h"
 #include "procmsg.h"
 #include "procheader.h"
 #include "utils.h"
-
-static void    mh_folder_init                  (Folder         *folder,
-                                                const gchar    *name,
-                                                const gchar    *path);
-
-GSList  *mh_get_msg_list       (Folder         *folder,
-                                FolderItem     *item,
-                                gboolean        use_cache);
-gchar   *mh_fetch_msg          (Folder         *folder,
-                                FolderItem     *item,
-                                gint            num);
-MsgInfo   *mh_get_msginfo      (Folder         *folder,
-                                FolderItem     *item,
-                                gint            num);
-gint     mh_add_msg            (Folder         *folder,
-                                FolderItem     *dest,
-                                const gchar    *file,
-                                gboolean        remove_source);
-gint     mh_move_msg           (Folder         *folder,
-                                FolderItem     *dest,
-                                MsgInfo        *msginfo);
-gint     mh_move_msgs_with_dest        (Folder         *folder,
-                                FolderItem     *dest,
-                                GSList         *msglist);
-gint     mh_copy_msg           (Folder         *folder,
-                                FolderItem     *dest,
-                                MsgInfo        *msginfo);
-gint     mh_copy_msgs_with_dest        (Folder         *folder,
-                                FolderItem     *dest,
-                                GSList         *msglist);
-gint     mh_remove_msg         (Folder         *folder,
-                                FolderItem     *item,
-                                gint            num);
-gint     mh_remove_all_msg     (Folder         *folder,
-                                FolderItem     *item);
-gboolean mh_is_msg_changed     (Folder         *folder,
-                                FolderItem     *item,
-                                MsgInfo        *msginfo);
-
-gint    mh_scan_folder         (Folder         *folder,
-                                FolderItem     *item);
-gint mh_get_num_list           (Folder         *folder,
-                                FolderItem     *item,
-                                GSList        **list);
-void    mh_scan_tree           (Folder         *folder);
-
-gint    mh_create_tree         (Folder         *folder);
-FolderItem *mh_create_folder   (Folder         *folder,
-                                FolderItem     *parent,
-                                const gchar    *name);
-gint    mh_rename_folder       (Folder         *folder,
-                                FolderItem     *item,
-                                const gchar    *name);
-gint    mh_remove_folder       (Folder         *folder,
-                                FolderItem     *item);
-
-gchar   *mh_get_new_msg_filename               (FolderItem     *dest);
+#include "codeconv.h"
+
+static void    mh_folder_init          (Folder         *folder,
+                                        const gchar    *name,
+                                        const gchar    *path);
+
+static Folder  *mh_folder_new          (const gchar    *name,
+                                        const gchar    *path);
+static void     mh_folder_destroy      (Folder         *folder);
+static gchar   *mh_fetch_msg           (Folder         *folder,
+                                        FolderItem     *item,
+                                        gint            num);
+static MsgInfo *mh_get_msginfo         (Folder         *folder,
+                                        FolderItem     *item,
+                                        gint            num);
+static gint     mh_add_msg             (Folder         *folder,
+                                        FolderItem     *dest,
+                                        const gchar    *file,
+                                        MsgFlags       *flags);
+static gint     mh_add_msgs            (Folder         *folder,
+                                        FolderItem     *dest,
+                                        GSList         *file_list,
+                                        GRelation      *relation);
+static gint     mh_copy_msg            (Folder         *folder,
+                                        FolderItem     *dest,
+                                        MsgInfo        *msginfo);
+static gint     mh_remove_msg          (Folder         *folder,
+                                        FolderItem     *item,
+                                        gint            num);
+static gint     mh_remove_all_msg      (Folder         *folder,
+                                        FolderItem     *item);
+static gboolean mh_is_msg_changed      (Folder         *folder,
+                                        FolderItem     *item,
+                                        MsgInfo        *msginfo);
+
+static gint    mh_get_num_list         (Folder         *folder,
+                                        FolderItem     *item, 
+                                        GSList         **list, 
+                                        gboolean       *old_uids_valid);
+static gint    mh_scan_tree            (Folder         *folder);
+
+static gint    mh_create_tree          (Folder         *folder);
+static FolderItem *mh_create_folder    (Folder         *folder,
+                                        FolderItem     *parent,
+                                        const gchar    *name);
+static gint    mh_rename_folder                (Folder         *folder,
+                                        FolderItem     *item,
+                                        const gchar    *name);
+static gint    mh_remove_folder                (Folder         *folder,
+                                        FolderItem     *item);
+
+static gchar   *mh_get_new_msg_filename                (FolderItem     *dest);
 
 static MsgInfo *mh_parse_msg                   (const gchar    *file,
                                                 FolderItem     *item);
+static void    mh_remove_missing_folder_items  (Folder         *folder);
+static gchar   *mh_filename_from_utf8          (const gchar    *path);
+static gchar   *mh_filename_to_utf8            (const gchar    *path);
 static void    mh_scan_tree_recursive          (FolderItem     *item);
 
 static gboolean mh_rename_folder_func          (GNode          *node,
                                                 gpointer        data);
+static gchar   *mh_item_get_path               (Folder *folder, 
+                                                FolderItem *item);
+
+static gboolean mh_scan_required       (Folder         *folder,
+                                        FolderItem     *item);
+
+static FolderClass mh_class;
+
+FolderClass *mh_get_class(void)
+{
+       if (mh_class.idstr == NULL) {
+               mh_class.type = F_MH;
+               mh_class.idstr = "mh";
+               mh_class.uistr = "MH";
+               
+               /* Folder functions */
+               mh_class.new_folder = mh_folder_new;
+               mh_class.destroy_folder = mh_folder_destroy;
+               mh_class.set_xml = folder_local_set_xml;
+               mh_class.get_xml = folder_local_get_xml;
+               mh_class.scan_tree = mh_scan_tree;
+               mh_class.create_tree = mh_create_tree;
+
+               /* FolderItem functions */
+               mh_class.item_get_path = mh_item_get_path;
+               mh_class.create_folder = mh_create_folder;
+               mh_class.rename_folder = mh_rename_folder;
+               mh_class.remove_folder = mh_remove_folder;
+               mh_class.get_num_list = mh_get_num_list;
+               mh_class.scan_required = mh_scan_required;
+               
+               /* Message functions */
+               mh_class.get_msginfo = mh_get_msginfo;
+               mh_class.fetch_msg = mh_fetch_msg;
+               mh_class.add_msg = mh_add_msg;
+               mh_class.add_msgs = mh_add_msgs;
+               mh_class.copy_msg = mh_copy_msg;
+               mh_class.remove_msg = mh_remove_msg;
+               mh_class.remove_all_msg = mh_remove_all_msg;
+               mh_class.is_msg_changed = mh_is_msg_changed;
+       }
 
+       return &mh_class;
+}
 
-Folder *mh_folder_new(const gchar *name, const gchar *path)
+static Folder *mh_folder_new(const gchar *name, const gchar *path)
 {
        Folder *folder;
 
        folder = (Folder *)g_new0(MHFolder, 1);
+       folder->klass = &mh_class;
        mh_folder_init(folder, name, path);
 
        return folder;
 }
 
-void mh_folder_destroy(Folder *folder)
+static void mh_folder_destroy(Folder *folder)
 {
        folder_local_folder_destroy(LOCAL_FOLDER(folder));
 }
 
 static void mh_folder_init(Folder *folder, const gchar *name, const gchar *path)
 {
-       folder->type = F_MH;
-
        folder_local_folder_init(folder, name, path);
 
-/*     folder->get_msg_list        = mh_get_msg_list; */
-       folder->fetch_msg           = mh_fetch_msg;
-       folder->get_msginfo         = mh_get_msginfo;
-       folder->add_msg             = mh_add_msg;
-       folder->move_msg            = mh_move_msg;
-       folder->move_msgs_with_dest = mh_move_msgs_with_dest;
-       folder->copy_msg            = mh_copy_msg;
-       folder->copy_msgs_with_dest = mh_copy_msgs_with_dest;
-       folder->remove_msg          = mh_remove_msg;
-       folder->remove_all_msg      = mh_remove_all_msg;
-       folder->is_msg_changed      = mh_is_msg_changed;
-/*     folder->scan                = mh_scan_folder; */
-       folder->get_num_list        = mh_get_num_list;
-       folder->scan_tree           = mh_scan_tree;
-       folder->create_tree         = mh_create_tree;
-       folder->create_folder       = mh_create_folder;
-       folder->rename_folder       = mh_rename_folder;
-       folder->remove_folder       = mh_remove_folder;
-       folder->destroy             = mh_folder_destroy;
+}
+
+gboolean mh_scan_required(Folder *folder, FolderItem *item)
+{
+       gchar *path;
+       struct stat s;
+
+       path = folder_item_get_path(item);
+       g_return_val_if_fail(path != NULL, FALSE);
+
+       if (stat(path, &s) < 0) {
+               FILE_OP_ERROR(path, "stat");
+               g_free(path);
+               return FALSE;
+       }
+
+       if ((s.st_mtime > item->mtime) &&
+               (s.st_mtime - 3600 != item->mtime)) {
+               debug_print("MH scan required, folder updated: %s (%ld > %ld)\n",
+                           path,
+                           s.st_mtime,
+                           item->mtime);
+               g_free(path);
+               return TRUE;
+       }
+
+       debug_print("MH scan not required: %s (%ld <= %ld)\n",
+                   path,
+                   s.st_mtime,
+                   item->mtime);
+       g_free(path);
+       return FALSE;
 }
 
 void mh_get_last_num(Folder *folder, FolderItem *item)
@@ -155,7 +208,6 @@ void mh_get_last_num(Folder *folder, FolderItem *item)
        gchar *path;
        DIR *dp;
        struct dirent *d;
-       struct stat s;
        gint max = 0;
        gint num;
 
@@ -177,9 +229,8 @@ void mh_get_last_num(Folder *folder, FolderItem *item)
        }
 
        while ((d = readdir(dp)) != NULL) {
-               if ((num = to_number(d->d_name)) >= 0 &&
-                   stat(d->d_name, &s) == 0 &&
-                   S_ISREG(s.st_mode)) {
+               if ((num = to_number(d->d_name)) > 0 &&
+                   dirent_is_regular_file(d)) {
                        if (max < num)
                                max = num;
                }
@@ -190,18 +241,19 @@ void mh_get_last_num(Folder *folder, FolderItem *item)
        item->last_num = max;
 }
 
-gint mh_get_num_list(Folder *folder, FolderItem *item, GSList **list)
+gint mh_get_num_list(Folder *folder, FolderItem *item, GSList **list, gboolean *old_uids_valid)
 {
 
        gchar *path;
        DIR *dp;
        struct dirent *d;
-       struct stat s;
        gint num, nummsgs = 0;
 
        g_return_val_if_fail(item != NULL, -1);
 
-       debug_print("mh_get_last_num(): Scanning %s ...\n", item->path);
+       debug_print("mh_get_num_list(): Scanning %s ...\n", item->path);
+
+       *old_uids_valid = TRUE;
 
        path = folder_item_get_path(item);
        g_return_val_if_fail(path != NULL, -1);
@@ -217,19 +269,18 @@ gint mh_get_num_list(Folder *folder, FolderItem *item, GSList **list)
        }
 
        while ((d = readdir(dp)) != NULL) {
-               if ((num = to_number(d->d_name)) >= 0 &&
-                   stat(d->d_name, &s) == 0 &&
-                   S_ISREG(s.st_mode)) {
+               if ((num = to_number(d->d_name)) > 0) {
                        *list = g_slist_prepend(*list, GINT_TO_POINTER(num));
-                   nummsgs++;
+                       nummsgs++;
                }
        }
        closedir(dp);
 
+       item->mtime = time(NULL);
        return nummsgs;
 }
 
-gchar *mh_fetch_msg(Folder *folder, FolderItem *item, gint num)
+static gchar *mh_fetch_msg(Folder *folder, FolderItem *item, gint num)
 {
        gchar *path;
        gchar *file;
@@ -239,16 +290,17 @@ gchar *mh_fetch_msg(Folder *folder, FolderItem *item, gint num)
 
        path = folder_item_get_path(item);
        file = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
-       g_free(path);
+
        if (!is_file_exist(file)) {
                g_free(file);
+               g_free(path);
                return NULL;
        }
-
+       g_free(path);
        return file;
 }
 
-MsgInfo *mh_get_msginfo(Folder *folder, FolderItem *item, gint num)
+static MsgInfo *mh_get_msginfo(Folder *folder, FolderItem *item, gint num)
 {
        MsgInfo *msginfo;
        gchar *file;
@@ -268,7 +320,7 @@ MsgInfo *mh_get_msginfo(Folder *folder, FolderItem *item, gint num)
        return msginfo;
 }
 
-gchar *mh_get_new_msg_filename(FolderItem *dest)
+static gchar *mh_get_new_msg_filename(FolderItem *dest)
 {
        gchar *destfile;
        gchar *destpath;
@@ -294,177 +346,55 @@ gchar *mh_get_new_msg_filename(FolderItem *dest)
        return destfile;
 }
 
-#define SET_DEST_MSG_FLAGS(fp, dest, msginfo) \
-{ \
-       MsgInfo newmsginfo; \
- \
-       newmsginfo.msgnum = dest->last_num; \
-       newmsginfo.flags = msginfo->flags; \
-       if (dest->stype == F_OUTBOX || \
-           dest->stype == F_QUEUE  || \
-           dest->stype == F_DRAFT  || \
-           dest->stype == F_TRASH) \
-               MSG_UNSET_PERM_FLAGS(newmsginfo.flags, \
-                                    MSG_NEW|MSG_UNREAD|MSG_DELETED); \
- \
-       procmsg_write_flags(&newmsginfo, fp); \
-}
-
-gint mh_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
-               gboolean remove_source)
+static gint mh_add_msg(Folder *folder, FolderItem *dest, const gchar *file, MsgFlags *flags)
 {
-       gchar *destfile;
+       gint ret;
+       GSList file_list;
+       MsgFileInfo fileinfo;
 
-       g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(file != NULL, -1);
 
-       if (dest->last_num < 0) {
-               mh_get_last_num(folder, dest);
-               if (dest->last_num < 0) return -1;
-       }
-
-       destfile = mh_get_new_msg_filename(dest);
-       g_return_val_if_fail(destfile != NULL, -1);
-
-       if (link(file, destfile) < 0) {
-               if (copy_file(file, destfile, TRUE) < 0) {
-                       g_warning("can't copy message %s to %s\n",
-                                 file, destfile);
-                       g_free(destfile);
-                       return -1;
-               }
-       }
-
-       if (remove_source) {
-               if (unlink(file) < 0)
-                       FILE_OP_ERROR(file, "unlink");
-       }
-
-       g_free(destfile);
-       dest->last_num++;
-       return dest->last_num;
-}
-
-static gint mh_do_move(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
-{
-       gchar *srcfile;
-       gchar *destfile;
-       gint filemode = 0;
-       PrefsFolderItem *prefs;
-
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msginfo != NULL, -1);
-
-       if (msginfo->folder == dest) {
-               g_warning("the src folder is identical to the dest.\n");
-               return -1;
-       }
-
-       if (dest->last_num < 0) {
-               mh_get_last_num(folder, dest);
-               if (dest->last_num < 0) return -1;
-       }
+       fileinfo.msginfo = NULL;
+       fileinfo.file = (gchar *)file;
+       fileinfo.flags = flags;
+       file_list.data = &fileinfo;
+       file_list.next = NULL;
 
-       prefs = dest->prefs;
-
-       destfile = mh_get_new_msg_filename(dest);
-       if (!destfile) return -1;
-
-       srcfile = procmsg_get_message_file(msginfo);
-       
-       debug_print("Moving message %s%c%d to %s ...\n",
-                   msginfo->folder->path, G_DIR_SEPARATOR,
-                   msginfo->msgnum, dest->path);
-
-       if (move_file(srcfile, destfile, FALSE) < 0) {
-               g_free(srcfile);
-               g_free(destfile);
-               return -1;
-       }
-
-       if (prefs && prefs->enable_folder_chmod && prefs->folder_chmod) {
-               if (chmod(destfile, prefs->folder_chmod) < 0)
-                       FILE_OP_ERROR(destfile, "chmod");
-
-               /* for mark file */
-               filemode = prefs->folder_chmod;
-               if (filemode & S_IRGRP) filemode |= S_IWGRP;
-               if (filemode & S_IROTH) filemode |= S_IWOTH;
-       }
-
-       g_free(srcfile);
-       g_free(destfile);
-       dest->last_num++;
-
-       return dest->last_num;
-}
-
-gint mh_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
-{
-       gchar *srcfile;
-       gint ret = 0;
-       g_return_val_if_fail(folder != NULL, -1);
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msginfo != NULL, -1);
-       g_return_val_if_fail(msginfo->folder != NULL, -1);
-       if (folder == msginfo->folder->folder)
-               return mh_do_move(folder, dest, msginfo);
-       srcfile = procmsg_get_message_file(msginfo);
-       if (!srcfile) return -1;
-       ret = mh_add_msg(folder, dest, srcfile, FALSE);
-       g_free(srcfile);
-       if (ret != -1)
-               ret = folder_item_remove_msg(msginfo->folder, msginfo->msgnum);
+        ret = mh_add_msgs(folder, dest, &file_list, NULL);
+       return ret;
+} 
  
-       return ret;
-}
-
-static gint mh_do_move_msgs_with_dest(Folder *folder, FolderItem *dest,
-                                     GSList *msglist)
-{
-       gchar *srcfile;
+static gint mh_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list, 
+                 GRelation *relation)
+{ 
        gchar *destfile;
        GSList *cur;
-       MsgInfo *msginfo;
-       PrefsFolderItem *prefs;
+       MsgFileInfo *fileinfo;
 
        g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msglist != NULL, -1);
+       g_return_val_if_fail(file_list != NULL, -1);
 
        if (dest->last_num < 0) {
                mh_get_last_num(folder, dest);
                if (dest->last_num < 0) return -1;
        }
 
-       prefs = dest->prefs;
-
-       for (cur = msglist; cur != NULL; cur = cur->next) {
-               msginfo = (MsgInfo *)cur->data;
-
-               if (msginfo->folder == dest) {
-                       g_warning("the src folder is identical to the dest.\n");
-                       continue;
-               }
-               debug_print("Moving message %s%c%d to %s ...\n",
-                           msginfo->folder->path, G_DIR_SEPARATOR,
-                           msginfo->msgnum, dest->path);
+       for (cur = file_list; cur != NULL; cur = cur->next) {
+               fileinfo = (MsgFileInfo *)cur->data;
 
                destfile = mh_get_new_msg_filename(dest);
-               if (!destfile) return -1;
-               srcfile = procmsg_get_message_file(msginfo);
-
-               if (move_file(srcfile, destfile, FALSE) < 0) {
-                       g_free(srcfile);
-                       g_free(destfile);
-                       break;
+               if (destfile == NULL) return -1;
+
+               if (link(fileinfo->file, destfile) < 0) {
+                       if (copy_file(fileinfo->file, destfile, TRUE) < 0) {
+                               g_warning(_("can't copy message %s to %s\n"),
+                                         fileinfo->file, destfile);
+                               g_free(destfile);
+                               return -1;
+                       }
                }
-
-               g_free(srcfile);
+               if (relation != NULL)
+                       g_relation_insert(relation, fileinfo, GINT_TO_POINTER(dest->last_num + 1));
                g_free(destfile);
                dest->last_num++;
        }
@@ -472,31 +402,13 @@ static gint mh_do_move_msgs_with_dest(Folder *folder, FolderItem *dest,
        return dest->last_num;
 }
 
-gint mh_move_msgs_with_dest(Folder *folder, FolderItem *dest, GSList *msglist)
-{
-       MsgInfo *msginfo;
-       GSList *cur;
-       gint ret = 0;
-
-       msginfo = (MsgInfo *)msglist->data;
-       if (folder == msginfo->folder->folder)
-               return mh_do_move_msgs_with_dest(folder, dest, msglist);
-
-       for (cur = msglist; cur != NULL; cur = cur->next) {
-               msginfo = (MsgInfo *)cur->data;
-               ret = mh_move_msg(folder, dest, msginfo);
-               if (ret == -1) break;
-       }
-
-       return ret;
-}
-
-gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
+static gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 {
+       gboolean dest_need_scan = FALSE;
        gchar *srcfile;
        gchar *destfile;
        gint filemode = 0;
-       PrefsFolderItem *prefs;
+       FolderItemPrefs *prefs;
 
        g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(msginfo != NULL, -1);
@@ -539,6 +451,10 @@ gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
                return -1;
        }
 
+       dest_need_scan = mh_scan_required(dest->folder, dest);
+       if (!dest_need_scan)
+               dest->mtime = time(NULL);
+
 
        if (prefs && prefs->enable_folder_chmod && prefs->folder_chmod) {
                if (chmod(destfile, prefs->folder_chmod) < 0)
@@ -557,96 +473,9 @@ gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
        return dest->last_num;
 }
 
-/*
-gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
-{
-       Folder * src_folder;
-       gchar * filename;
-       gint num;
-       gchar * destdir;
-       FILE * fp;
-
-       src_folder = msginfo->folder->folder;
-       
-       g_return_val_if_fail(src_folder->fetch_msg != NULL, -1);
-       
-       filename = src_folder->fetch_msg(src_folder,
-                                        msginfo->folder,
-                                        msginfo->msgnum);
-       if (filename == NULL)
-               return -1;
-
-       num = folder->add_msg(folder, dest, filename, FALSE);
-
-       destdir = folder_item_get_path(dest);
-
-       if (fp) {
-               MsgInfo newmsginfo;
-
-               newmsginfo.msgnum = dest->last_num;
-               newmsginfo.flags = msginfo->flags;
-               if (dest->stype == F_OUTBOX ||
-                   dest->stype == F_QUEUE  ||
-                   dest->stype == F_DRAFT  ||
-                   dest->stype == F_TRASH)
-                       MSG_UNSET_FLAGS(newmsginfo.flags,
-                                       MSG_NEW|MSG_UNREAD|MSG_DELETED);
-
-               procmsg_write_flags(&newmsginfo, fp);
-               fclose(fp);
-       }
-       
-       return num;
-}
-*/
-
-gint mh_copy_msgs_with_dest(Folder *folder, FolderItem *dest, GSList *msglist)
-{
-       gchar *srcfile;
-       gchar *destfile;
-       GSList *cur;
-       MsgInfo *msginfo;
-
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msglist != NULL, -1);
-
-       if (dest->last_num < 0) {
-               mh_get_last_num(folder, dest);
-               if (dest->last_num < 0) return -1;
-       }
-
-       for (cur = msglist; cur != NULL; cur = cur->next) {
-               msginfo = (MsgInfo *)cur->data;
-
-               if (msginfo->folder == dest) {
-                       g_warning("the src folder is identical to the dest.\n");
-                       continue;
-               }
-               debug_print("Copying message %s%c%d to %s ...\n",
-                           msginfo->folder->path, G_DIR_SEPARATOR,
-                           msginfo->msgnum, dest->path);
-
-               destfile = mh_get_new_msg_filename(dest);
-               if (!destfile) break;
-               srcfile = procmsg_get_message_file(msginfo);
-
-               if (copy_file(srcfile, destfile, TRUE) < 0) {
-                       FILE_OP_ERROR(srcfile, "copy");
-                       g_free(srcfile);
-                       g_free(destfile);
-                       break;
-               }
-
-               g_free(srcfile);
-               g_free(destfile);
-               dest->last_num++;
-       }
-
-       return dest->last_num;
-}
-
-gint mh_remove_msg(Folder *folder, FolderItem *item, gint num)
+static gint mh_remove_msg(Folder *folder, FolderItem *item, gint num)
 {
+       gboolean need_scan = FALSE;
        gchar *file;
 
        g_return_val_if_fail(item != NULL, -1);
@@ -654,17 +483,22 @@ gint mh_remove_msg(Folder *folder, FolderItem *item, gint num)
        file = mh_fetch_msg(folder, item, num);
        g_return_val_if_fail(file != NULL, -1);
 
+       need_scan = mh_scan_required(folder, item);
+
        if (unlink(file) < 0) {
                FILE_OP_ERROR(file, "unlink");
                g_free(file);
                return -1;
        }
 
+       if (!need_scan)
+               item->mtime = time(NULL);
+
        g_free(file);
        return 0;
 }
 
-gint mh_remove_all_msg(Folder *folder, FolderItem *item)
+static gint mh_remove_all_msg(Folder *folder, FolderItem *item)
 {
        gchar *path;
        gint val;
@@ -679,102 +513,47 @@ gint mh_remove_all_msg(Folder *folder, FolderItem *item)
        return val;
 }
 
-gboolean mh_is_msg_changed(Folder *folder, FolderItem *item, MsgInfo *msginfo)
+static gboolean mh_is_msg_changed(Folder *folder, FolderItem *item,
+                                 MsgInfo *msginfo)
 {
        struct stat s;
 
        if (stat(itos(msginfo->msgnum), &s) < 0 ||
-           msginfo->size  != s.st_size ||
-           msginfo->mtime != s.st_mtime)
+           msginfo->size  != s.st_size || (
+               (msginfo->mtime - s.st_mtime != 0) &&
+               (msginfo->mtime - s.st_mtime != 3600) &&
+               (msginfo->mtime - s.st_mtime != -3600)))
                return TRUE;
 
        return FALSE;
 }
 
-gint mh_scan_folder(Folder *folder, FolderItem *item)
-{
-       gchar *path;
-       DIR *dp;
-       struct dirent *d;
-       struct stat s;
-       gint max = 0;
-       gint num;
-
-       g_return_val_if_fail(item != NULL, -1);
-
-       debug_print("mh_scan_folder(): Scanning %s ...\n", item->path);
-
-       path = folder_item_get_path(item);
-       g_return_val_if_fail(path != NULL, -1);
-       if (change_dir(path) < 0) {
-               g_free(path);
-               return -1;
-       }
-       g_free(path);
-
-       if ((dp = opendir(".")) == NULL) {
-               FILE_OP_ERROR(item->path, "opendir");
-               return -1;
-       }
-
-       if (folder->ui_func)
-               folder->ui_func(folder, item, folder->ui_func_data);
-
-       while ((d = readdir(dp)) != NULL) {
-               if ((num = to_number(d->d_name)) >= 0 &&
-                   stat(d->d_name, &s) == 0 &&
-                   S_ISREG(s.st_mode)) {
-/*
-                       n_msg++;
-*/
-                       if (max < num)
-                               max = num;
-               }
-       }
-       closedir(dp);
-
-/*
-       if (n_msg == 0)
-               item->new = item->unread = item->total = 0;
-       else {
-               gint new, unread, total, min, max;
-
-               procmsg_get_mark_sum(".", &new, &unread, &total, &min, &max, 0);
-               if (n_msg > total) {
-                       new += n_msg - total;
-                       unread += n_msg - total;
-               }
-               item->new = new;
-               item->unread = unread;
-               item->total = n_msg;
-       }
-*/
-       debug_print("Last number in dir %s = %d\n", item->path, max);
-       item->last_num = max;
-
-       return 0;
-}
-
-void mh_scan_tree(Folder *folder)
+static gint mh_scan_tree(Folder *folder)
 {
        FolderItem *item;
        gchar *rootpath;
 
-       g_return_if_fail(folder != NULL);
+       g_return_val_if_fail(folder != NULL, -1);
 
-       item = folder_item_new(folder, folder->name, NULL);
-       item->folder = folder;
-       folder->node = g_node_new(item);
+       if (!folder->node) {
+               item = folder_item_new(folder, folder->name, NULL);
+               item->folder = folder;
+               folder->node = item->node = g_node_new(item);
+       } else
+               item = FOLDER_ITEM(folder->node->data);
 
        rootpath = folder_item_get_path(item);
        if (change_dir(rootpath) < 0) {
                g_free(rootpath);
-               return;
+               return -1;
        }
        g_free(rootpath);
 
        mh_create_tree(folder);
+       mh_remove_missing_folder_items(folder);
        mh_scan_tree_recursive(item);
+
+       return 0;
 }
 
 #define MAKE_DIR_IF_NOT_EXIST(dir) \
@@ -790,7 +569,7 @@ void mh_scan_tree(Folder *folder)
        } \
 }
 
-gint mh_create_tree(Folder *folder)
+static gint mh_create_tree(Folder *folder)
 {
        gchar *rootpath;
 
@@ -811,10 +590,40 @@ gint mh_create_tree(Folder *folder)
 
 #undef MAKE_DIR_IF_NOT_EXIST
 
-FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
-                            const gchar *name)
+static gchar *mh_item_get_path(Folder *folder, FolderItem *item)
 {
-       gchar *path;
+       gchar *folder_path, *path;
+
+       g_return_val_if_fail(folder != NULL, NULL);
+       g_return_val_if_fail(item != NULL, NULL);
+
+       folder_path = g_strdup(LOCAL_FOLDER(folder)->rootpath);
+       g_return_val_if_fail(folder_path != NULL, NULL);
+
+        if (folder_path[0] == G_DIR_SEPARATOR) {
+                if (item->path)
+                        path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
+                                           item->path, NULL);
+                else
+                        path = g_strdup(folder_path);
+        } else {
+                if (item->path)
+                        path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
+                                           folder_path, G_DIR_SEPARATOR_S,
+                                           item->path, NULL);
+                else
+                        path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
+                                           folder_path, NULL);
+        }
+       g_free(folder_path);
+
+       return path;
+}
+
+static FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
+                                   const gchar *name)
+{
+       gchar *path, *real_name;
        gchar *fullpath;
        FolderItem *new_item;
        gchar *mh_sequences_filename;
@@ -829,7 +638,9 @@ FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
                if (make_dir_hier(path) != 0)
                        return NULL;
                
-       fullpath = g_strconcat(path, G_DIR_SEPARATOR_S, name, NULL);
+       real_name = mh_filename_from_utf8(name);
+       fullpath = g_strconcat(path, G_DIR_SEPARATOR_S, real_name, NULL);
+       g_free(real_name);
        g_free(path);
 
        if (make_dir(fullpath) < 0) {
@@ -861,12 +672,13 @@ FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
        return new_item;
 }
 
-gint mh_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
+static gint mh_rename_folder(Folder *folder, FolderItem *item,
+                            const gchar *name)
 {
+       gchar *real_name;
        gchar *oldpath;
        gchar *dirname;
-       gchar *newpath;
-       GNode *node;
+       gchar *newpath, *utf8newpath;
        gchar *paths[2];
 
        g_return_val_if_fail(folder != NULL, -1);
@@ -878,9 +690,10 @@ gint mh_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
        if (!is_dir_exist(oldpath))
                make_dir_hier(oldpath);
 
-       dirname = g_dirname(oldpath);
-       newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S, name, NULL);
-       g_free(dirname);
+       dirname = g_path_get_dirname(oldpath);
+       real_name = mh_filename_from_utf8(name);
+       newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S, real_name, NULL);
+       g_free(real_name);
 
        if (rename(oldpath, newpath) < 0) {
                FILE_OP_ERROR(oldpath, "rename");
@@ -893,20 +706,19 @@ gint mh_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
        g_free(newpath);
 
        if (strchr(item->path, G_DIR_SEPARATOR) != NULL) {
-               dirname = g_dirname(item->path);
-               newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S, name, NULL);
+               dirname = g_path_get_dirname(item->path);
+               utf8newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S,
+                                         name, NULL);
                g_free(dirname);
        } else
-               newpath = g_strdup(name);
+               utf8newpath = g_strdup(name);
 
        g_free(item->name);
        item->name = g_strdup(name);
 
-       node = g_node_find(item->folder->node, G_PRE_ORDER, G_TRAVERSE_ALL,
-                          item);
        paths[0] = g_strdup(item->path);
-       paths[1] = newpath;
-       g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
+       paths[1] = utf8newpath;
+       g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
                        mh_rename_folder_func, paths);
 
        g_free(paths[0]);
@@ -914,7 +726,7 @@ gint mh_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
        return 0;
 }
 
-gint mh_remove_folder(Folder *folder, FolderItem *item)
+static gint mh_remove_folder(Folder *folder, FolderItem *item)
 {
        gchar *path;
 
@@ -936,16 +748,15 @@ gint mh_remove_folder(Folder *folder, FolderItem *item)
 
 static MsgInfo *mh_parse_msg(const gchar *file, FolderItem *item)
 {
-       struct stat s;
        MsgInfo *msginfo;
        MsgFlags flags;
 
-       flags.perm_flags = MSG_NEW|MSG_UNREAD;
-       flags.tmp_flags = 0;
-
        g_return_val_if_fail(item != NULL, NULL);
        g_return_val_if_fail(file != NULL, NULL);
 
+       flags.perm_flags = MSG_NEW|MSG_UNREAD;
+       flags.tmp_flags = 0;
+
        if (item->stype == F_QUEUE) {
                MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
        } else if (item->stype == F_DRAFT) {
@@ -958,15 +769,6 @@ static MsgInfo *mh_parse_msg(const gchar *file, FolderItem *item)
        msginfo->msgnum = atoi(file);
        msginfo->folder = item;
 
-       if (stat(file, &s) < 0) {
-               FILE_OP_ERROR(file, "stat");
-               msginfo->size = 0;
-               msginfo->mtime = 0;
-       } else {
-               msginfo->size = s.st_size;
-               msginfo->mtime = s.st_mtime;
-       }
-
        return msginfo;
 }
 
@@ -996,83 +798,149 @@ static gboolean mh_is_maildir(const gchar *path)
 }
 #endif
 
+static gboolean mh_remove_missing_folder_items_func(GNode *node, gpointer data)
+{
+       FolderItem *item;
+       gchar *path;
+
+       g_return_val_if_fail(node->data != NULL, FALSE);
+
+       if (G_NODE_IS_ROOT(node))
+               return FALSE;
+
+       item = FOLDER_ITEM(node->data);
+
+       path = folder_item_get_path(item);
+       if (!is_dir_exist(path)) {
+               debug_print("folder '%s' not found. removing...\n", path);
+               folder_item_remove(item);
+       }
+       g_free(path);
+
+       return FALSE;
+}
+
+static void mh_remove_missing_folder_items(Folder *folder)
+{
+       g_return_if_fail(folder != NULL);
+
+       debug_print("searching missing folders...\n");
+
+       g_node_traverse(folder->node, G_POST_ORDER, G_TRAVERSE_ALL, -1,
+                       mh_remove_missing_folder_items_func, folder);
+}
+
 static void mh_scan_tree_recursive(FolderItem *item)
 {
+       Folder *folder;
        DIR *dp;
        struct dirent *d;
        struct stat s;
-       gchar *entry;
+       gchar *real_path, *entry, *utf8entry, *utf8name;
        gint n_msg = 0;
 
        g_return_if_fail(item != NULL);
        g_return_if_fail(item->folder != NULL);
 
-       dp = opendir(item->path ? item->path : ".");
+       folder = item->folder;
+
+       real_path = item->path ? mh_filename_from_utf8(item->path) : g_strdup(".");
+       dp = opendir(real_path);
        if (!dp) {
-               FILE_OP_ERROR(item->path ? item->path : ".", "opendir");
+               FILE_OP_ERROR(real_path, "opendir");
                return;
        }
+       g_free(real_path);
 
        debug_print("scanning %s ...\n",
                    item->path ? item->path
                    : LOCAL_FOLDER(item->folder)->rootpath);
-       if (item->folder->ui_func)
-               item->folder->ui_func(item->folder, item,
-                                     item->folder->ui_func_data);
+       if (folder->ui_func)
+               folder->ui_func(folder, item, folder->ui_func_data);
 
        while ((d = readdir(dp)) != NULL) {
                if (d->d_name[0] == '.') continue;
 
+               utf8name = mh_filename_to_utf8(d->d_name);
                if (item->path)
-                       entry = g_strconcat(item->path, G_DIR_SEPARATOR_S,
-                                           d->d_name, NULL);
+                       utf8entry = g_strconcat(item->path, G_DIR_SEPARATOR_S,
+                                               utf8name, NULL);
                else
-                       entry = g_strdup(d->d_name);
+                       utf8entry = g_strdup(utf8name);
+               entry = mh_filename_from_utf8(utf8entry);
 
-               if (stat(entry, &s) < 0) {
-                       FILE_OP_ERROR(entry, "stat");
-                       g_free(entry);
-                       continue;
-               }
-
-               if (S_ISDIR(s.st_mode)) {
-                       FolderItem *new_item;
+               if (
+#ifdef HAVE_DIRENT_D_TYPE
+                       d->d_type == DT_DIR ||
+                       (d->d_type == DT_UNKNOWN &&
+#endif
+                       stat(entry, &s) == 0 && S_ISDIR(s.st_mode)
+#ifdef HAVE_DIRENT_D_TYPE
+                       )
+#endif
+                  ) {
+                       FolderItem *new_item = NULL;
+                       GNode *node;
 
 #if 0
                        if (mh_is_maildir(entry)) {
                                g_free(entry);
+                               g_free(utf8entry);
+                               g_free(utf8name);
                                continue;
                        }
 #endif
 
-                       new_item = folder_item_new(item->folder, d->d_name, entry);
-                       folder_item_append(item, new_item);
+                       node = item->node;
+                       for (node = node->children; node != NULL; node = node->next) {
+                               FolderItem *cur_item = FOLDER_ITEM(node->data);
+                               if (!strcmp2(cur_item->path, entry)) {
+                                       new_item = cur_item;
+                                       break;
+                               }
+                       }
+                       if (!new_item) {
+                               debug_print("new folder '%s' found.\n", entry);
+                               new_item = folder_item_new(folder, utf8name, utf8entry);
+                               folder_item_append(item, new_item);
+                       }
+
                        if (!item->path) {
-                               if (!strcmp(d->d_name, INBOX_DIR)) {
+                               if (!folder->inbox &&
+                                   !strcmp(d->d_name, INBOX_DIR)) {
                                        new_item->stype = F_INBOX;
-                                       item->folder->inbox = new_item;
-                               } else if (!strcmp(d->d_name, OUTBOX_DIR)) {
+                                       folder->inbox = new_item;
+                               } else if (!folder->outbox &&
+                                          !strcmp(d->d_name, OUTBOX_DIR)) {
                                        new_item->stype = F_OUTBOX;
-                                       item->folder->outbox = new_item;
-                               } else if (!strcmp(d->d_name, DRAFT_DIR)) {
+                                       folder->outbox = new_item;
+                               } else if (!folder->draft &&
+                                          !strcmp(d->d_name, DRAFT_DIR)) {
                                        new_item->stype = F_DRAFT;
-                                       item->folder->draft = new_item;
-                               } else if (!strcmp(d->d_name, QUEUE_DIR)) {
+                                       folder->draft = new_item;
+                               } else if (!folder->queue &&
+                                          !strcmp(d->d_name, QUEUE_DIR)) {
                                        new_item->stype = F_QUEUE;
-                                       item->folder->queue = new_item;
-                               } else if (!strcmp(d->d_name, TRASH_DIR)) {
+                                       folder->queue = new_item;
+                               } else if (!folder->trash &&
+                                          !strcmp(d->d_name, TRASH_DIR)) {
                                        new_item->stype = F_TRASH;
-                                       item->folder->trash = new_item;
+                                       folder->trash = new_item;
                                }
                        }
+
                        mh_scan_tree_recursive(new_item);
                } else if (to_number(d->d_name) != -1) n_msg++;
 
                g_free(entry);
+               g_free(utf8entry);
+               g_free(utf8name);
        }
 
        closedir(dp);
 
+       item->mtime = time(NULL);
+
 /*
        if (item->path) {
                gint new, unread, total, min, max;
@@ -1118,3 +986,35 @@ static gboolean mh_rename_folder_func(GNode *node, gpointer data)
 
        return FALSE;
 }
+
+static gchar *mh_filename_from_utf8(const gchar *path)
+{
+       const gchar *src_codeset = CS_UTF_8;
+       const gchar *dest_codeset = conv_get_locale_charset_str();
+       gchar *real_path;
+
+       real_path = conv_codeset_strdup(path, src_codeset, dest_codeset);
+       if (!real_path) {
+               g_warning("mh_filename_from_utf8: faild to convert character set\n");
+               /* FIXME: show dialog? */
+               real_path = g_strdup(path);
+       }
+
+       return real_path;
+}
+
+static gchar *mh_filename_to_utf8(const gchar *path)
+{
+       const gchar *src_codeset = conv_get_locale_charset_str();
+       const gchar *dest_codeset = CS_UTF_8;
+       gchar *utf8path;
+
+       utf8path = conv_codeset_strdup(path, src_codeset, dest_codeset);
+       if (!utf8path) {
+               g_warning("mh_filename_to_utf8: faild to convert character set\n");
+               /* FIXME: show dialog? */
+               utf8path = g_strdup(path);
+       }
+
+       return utf8path;
+}