Initial import of Sylpheed (GTK2 version).

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@1 ee746299-78ed-0310-b773-934348b2243d

1 files changed, 1282 insertions, 0 deletions

diff --git a/src/mh.c b/src/mh.c
new file mode 100644
index 00000000..7c7e5bd3
--- /dev/null
+++ b/src/mh.c
@@ -0,0 +1,1282 @@
+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2003 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "defs.h"
+
+#include <glib.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#undef MEASURE_TIME
+
+#ifdef MEASURE_TIME
+#  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);
+
+static Folder	*mh_folder_new		(const gchar	*name,
+					 const gchar	*path);
+static void     mh_folder_destroy	(Folder		*folder);
+
+static GSList  *mh_get_msg_list		(Folder		*folder,
+					 FolderItem	*item,
+					 gboolean	 use_cache);
+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,
+					 gboolean	 remove_source);
+static gint     mh_add_msgs		(Folder		*folder,
+					 FolderItem	*dest,
+					 GSList		*file_list,
+					 gboolean	 remove_source,
+					 gint		*first);
+static gint     mh_move_msg		(Folder		*folder,
+					 FolderItem	*dest,
+					 MsgInfo	*msginfo);
+static gint     mh_move_msgs		(Folder		*folder,
+					 FolderItem	*dest,
+					 GSList		*msglist);
+static gint     mh_copy_msg		(Folder		*folder,
+					 FolderItem	*dest,
+					 MsgInfo	*msginfo);
+static gint     mh_copy_msgs		(Folder		*folder,
+					 FolderItem	*dest,
+					 GSList		*msglist);
+static gint     mh_remove_msg		(Folder		*folder,
+					 FolderItem	*item,
+					 MsgInfo	*msginfo);
+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_close			(Folder		*folder,
+					 FolderItem	*item);
+
+static gint    mh_scan_folder_full	(Folder		*folder,
+					 FolderItem	*item,
+					 gboolean	 count_sum);
+static gint    mh_scan_folder		(Folder		*folder,
+					 FolderItem	*item);
+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 gint	mh_do_move_msgs			(Folder		*folder,
+						 FolderItem	*dest,
+						 GSList		*msglist);
+
+static time_t  mh_get_mtime			(FolderItem	*item);
+static GSList  *mh_get_uncached_msgs		(GHashTable	*msg_table,
+						 FolderItem	*item);
+static MsgInfo *mh_parse_msg			(const gchar	*file,
+						 FolderItem	*item);
+static void	mh_remove_missing_folder_items	(Folder		*folder);
+static void	mh_scan_tree_recursive		(FolderItem	*item);
+
+static gboolean mh_rename_folder_func		(GNode		*node,
+						 gpointer	 data);
+
+static FolderClass mh_class =
+{
+	F_MH,
+
+	mh_folder_new,
+	mh_folder_destroy,
+
+	mh_scan_tree,
+	mh_create_tree,
+
+	mh_get_msg_list,
+	mh_fetch_msg,
+	mh_get_msginfo,
+	mh_add_msg,
+	mh_add_msgs,
+	mh_move_msg,
+	mh_move_msgs,
+	mh_copy_msg,
+	mh_copy_msgs,
+	mh_remove_msg,
+	NULL,
+	mh_remove_all_msg,
+	mh_is_msg_changed,
+	mh_close,
+	mh_scan_folder,
+
+	mh_create_folder,
+	mh_rename_folder,
+	mh_remove_folder,
+};
+
+
+FolderClass *mh_get_class(void)
+{
+	return &mh_class;
+}
+
+static Folder *mh_folder_new(const gchar *name, const gchar *path)
+{
+	Folder *folder;
+
+	folder = (Folder *)g_new0(MHFolder, 1);
+	mh_folder_init(folder, name, path);
+
+	return 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->klass = mh_get_class();
+	folder_local_folder_init(folder, name, path);
+}
+
+static GSList *mh_get_msg_list(Folder *folder, FolderItem *item,
+			       gboolean use_cache)
+{
+	GSList *mlist;
+	GHashTable *msg_table;
+	time_t cur_mtime;
+#ifdef MEASURE_TIME
+	struct timeval tv_before, tv_after, tv_result;
+
+	gettimeofday(&tv_before, NULL);
+#endif
+
+	g_return_val_if_fail(item != NULL, NULL);
+
+	cur_mtime = mh_get_mtime(item);
+
+	if (use_cache && item->mtime == cur_mtime) {
+		debug_print("Folder is not modified.\n");
+		mlist = procmsg_read_cache(item, FALSE);
+		if (!mlist)
+			mlist = mh_get_uncached_msgs(NULL, item);
+	} else if (use_cache) {
+		GSList *newlist;
+
+		mlist = procmsg_read_cache(item, TRUE);
+		msg_table = procmsg_msg_hash_table_create(mlist);
+
+		newlist = mh_get_uncached_msgs(msg_table, item);
+		if (msg_table)
+			g_hash_table_destroy(msg_table);
+
+		mlist = g_slist_concat(mlist, newlist);
+	} else
+		mlist = mh_get_uncached_msgs(NULL, item);
+
+	item->mtime = cur_mtime;
+
+	procmsg_set_flags(mlist, item);
+
+	mlist = procmsg_sort_msg_list(mlist, item->sort_key, item->sort_type);
+
+#ifdef MEASURE_TIME
+	gettimeofday(&tv_after, NULL);
+
+	timersub(&tv_after, &tv_before, &tv_result);
+	g_print("mh_get_msg_list: %s: elapsed time: %ld.%06ld sec\n",
+		item->path, tv_result.tv_sec, tv_result.tv_usec);
+#endif
+
+	return mlist;
+}
+
+static gchar *mh_fetch_msg(Folder *folder, FolderItem *item, gint num)
+{
+	gchar *path;
+	gchar *file;
+
+	g_return_val_if_fail(item != NULL, NULL);
+	g_return_val_if_fail(num > 0, NULL);
+
+	if (item->last_num < 0 || num > item->last_num) {
+		mh_scan_folder(folder, item);
+		if (item->last_num < 0) return NULL;
+	}
+
+	g_return_val_if_fail(num <= item->last_num, NULL);
+
+	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);
+		return NULL;
+	}
+
+	return file;
+}
+
+static MsgInfo *mh_get_msginfo(Folder *folder, FolderItem *item, gint num)
+{
+	MsgInfo *msginfo;
+	gchar *file;
+
+	g_return_val_if_fail(item != NULL, NULL);
+	g_return_val_if_fail(num > 0, NULL);
+
+	file = mh_fetch_msg(folder, item, num);
+	if (!file) return NULL;
+
+	msginfo = mh_parse_msg(file, item);
+	if (msginfo)
+		msginfo->msgnum = num;
+
+	g_free(file);
+
+	return msginfo;
+}
+
+static gchar *mh_get_new_msg_filename(FolderItem *dest)
+{
+	gchar *destfile;
+	gchar *destpath;
+
+	destpath = folder_item_get_path(dest);
+	g_return_val_if_fail(destpath != NULL, NULL);
+
+	if (!is_dir_exist(destpath))
+		make_dir_hier(destpath);
+
+	for (;;) {
+		destfile = g_strdup_printf("%s%c%d", destpath, G_DIR_SEPARATOR,
+					   dest->last_num + 1);
+		if (is_file_entry_exist(destfile)) {
+			dest->last_num++;
+			g_free(destfile);
+		} else
+			break;
+	}
+
+	g_free(destpath);
+
+	return destfile;
+}
+
+#define SET_DEST_MSG_FLAGS(fp, dest, n, fl)				\
+{									\
+	MsgInfo newmsginfo;						\
+									\
+	newmsginfo.msgnum = n;						\
+	newmsginfo.flags = fl;						\
+	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);	\
+									\
+	if (fp)								\
+		procmsg_write_flags(&newmsginfo, fp);			\
+	else if (dest->opened)						\
+		procmsg_add_flags(dest, n, newmsginfo.flags);		\
+}
+
+static gint mh_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
+		       MsgFlags *flags, gboolean remove_source)
+{
+	GSList file_list;
+	MsgFileInfo fileinfo;
+
+	g_return_val_if_fail(file != NULL, -1);
+
+	fileinfo.file = (gchar *)file;
+	fileinfo.flags = flags;
+	file_list.data = &fileinfo;
+	file_list.next = NULL;
+
+	return mh_add_msgs(folder, dest, &file_list, remove_source, NULL);
+}
+
+static gint mh_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
+			gboolean remove_source, gint *first)
+{
+	gchar *destfile;
+	GSList *cur;
+	MsgFileInfo *fileinfo;
+	gint first_ = 0;
+	FILE *fp;
+
+	g_return_val_if_fail(dest != NULL, -1);
+	g_return_val_if_fail(file_list != NULL, -1);
+
+	if (dest->last_num < 0) {
+		mh_scan_folder(folder, dest);
+		if (dest->last_num < 0) return -1;
+	}
+
+	if ((((MsgFileInfo *)file_list->data)->flags == NULL &&
+	    file_list->next == NULL) || dest->opened)
+		fp = NULL;
+	else if ((fp = procmsg_open_mark_file(dest, DATA_APPEND)) == NULL)
+		g_warning("Can't open mark file.\n");
+
+	for (cur = file_list; cur != NULL; cur = cur->next) {
+		fileinfo = (MsgFileInfo *)cur->data;
+
+		destfile = mh_get_new_msg_filename(dest);
+		if (destfile == NULL) return -1;
+		if (first_ == 0 || first_ > dest->last_num + 1)
+			first_ = dest->last_num + 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(destfile);
+		dest->last_num++;
+		dest->total++;
+		dest->updated = TRUE;
+
+		if (fileinfo->flags) {
+			if (MSG_IS_RECEIVED(*fileinfo->flags)) {
+				if (dest->unmarked_num == 0)
+					dest->new = 0;
+				dest->unmarked_num++;
+				procmsg_add_mark_queue(dest, dest->last_num,
+						       *fileinfo->flags);
+			} else {
+				SET_DEST_MSG_FLAGS(fp, dest, dest->last_num,
+						   *fileinfo->flags);
+			}
+			if (MSG_IS_NEW(*fileinfo->flags))
+				dest->new++;
+			if (MSG_IS_UNREAD(*fileinfo->flags))
+				dest->unread++;
+		} else {
+			if (dest->unmarked_num == 0)
+				dest->new = 0;
+			dest->unmarked_num++;
+			dest->new++;
+			dest->unread++;
+		}
+	}
+
+	if (fp) fclose(fp);
+
+	if (first)
+		*first = first_;
+
+	if (remove_source) {
+		for (cur = file_list; cur != NULL; cur = cur->next) {
+			fileinfo = (MsgFileInfo *)cur->data;
+			if (unlink(fileinfo->file) < 0)
+				FILE_OP_ERROR(fileinfo->file, "unlink");
+		}
+	}
+
+	return dest->last_num;
+}
+
+static gint mh_do_move_msgs(Folder *folder, FolderItem *dest, GSList *msglist)
+{
+	FolderItem *src;
+	gchar *srcfile;
+	gchar *destfile;
+	FILE *fp;
+	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_scan_folder(folder, dest);
+		if (dest->last_num < 0) return -1;
+	}
+
+	if (dest->opened)
+		fp = NULL;
+	else if ((fp = procmsg_open_mark_file(dest, DATA_APPEND)) == NULL)
+		g_warning(_("Can't open mark file.\n"));
+
+	for (cur = msglist; cur != NULL; cur = cur->next) {
+		msginfo = (MsgInfo *)cur->data;
+		src = msginfo->folder;
+
+		if (src == dest) {
+			g_warning(_("the src folder is identical to the dest.\n"));
+			continue;
+		}
+		debug_print("Moving message %s%c%d to %s ...\n",
+			    src->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 (move_file(srcfile, destfile, FALSE) < 0) {
+			g_free(srcfile);
+			g_free(destfile);
+			break;
+		}
+
+		g_free(srcfile);
+		g_free(destfile);
+		src->total--;
+		src->updated = TRUE;
+		dest->last_num++;
+		dest->total++;
+		dest->updated = TRUE;
+
+		if (fp) {
+			SET_DEST_MSG_FLAGS(fp, dest, dest->last_num,
+					   msginfo->flags);
+		}
+
+		if (MSG_IS_NEW(msginfo->flags)) {
+			src->new--;
+			dest->new++;
+		}
+		if (MSG_IS_UNREAD(msginfo->flags)) {
+			src->unread--;
+			dest->unread++;
+		}
+
+		MSG_SET_TMP_FLAGS(msginfo->flags, MSG_INVALID);
+	}
+
+	if (fp) fclose(fp);
+
+	return dest->last_num;
+}
+
+static gint mh_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
+{
+	GSList msglist;
+
+	g_return_val_if_fail(msginfo != NULL, -1);
+
+	msglist.data = msginfo;
+	msglist.next = NULL;
+
+	return mh_move_msgs(folder, dest, &msglist);
+}
+
+static gint mh_move_msgs(Folder *folder, FolderItem *dest, GSList *msglist)
+{
+	MsgInfo *msginfo;
+	GSList *file_list;
+	gint ret = 0;
+	gint first;
+
+	msginfo = (MsgInfo *)msglist->data;
+	if (folder == msginfo->folder->folder)
+		return mh_do_move_msgs(folder, dest, msglist);
+
+	file_list = procmsg_get_message_file_list(msglist);
+	g_return_val_if_fail(file_list != NULL, -1);
+
+	ret = mh_add_msgs(folder, dest, file_list, FALSE, &first);
+
+	procmsg_message_file_list_free(file_list);
+
+	if (ret != -1)
+		ret = folder_item_remove_msgs(msginfo->folder, msglist);
+
+	return ret;
+}
+
+static gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
+{
+	GSList msglist;
+
+	g_return_val_if_fail(msginfo != NULL, -1);
+
+	msglist.data = msginfo;
+	msglist.next = NULL;
+
+	return mh_copy_msgs(folder, dest, &msglist);
+}
+
+static gint mh_copy_msgs(Folder *folder, FolderItem *dest, GSList *msglist)
+{
+	gchar *srcfile;
+	gchar *destfile;
+	FILE *fp;
+	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_scan_folder(folder, dest);
+		if (dest->last_num < 0) return -1;
+	}
+
+	if (dest->opened)
+		fp = NULL;
+	else if ((fp = procmsg_open_mark_file(dest, DATA_APPEND)) == NULL)
+		g_warning(_("Can't open mark file.\n"));
+
+	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++;
+		dest->total++;
+		dest->updated = TRUE;
+
+		if (fp) {
+			SET_DEST_MSG_FLAGS(fp, dest, dest->last_num,
+					   msginfo->flags);
+		}
+
+		if (MSG_IS_NEW(msginfo->flags))
+			dest->new++;
+		if (MSG_IS_UNREAD(msginfo->flags))
+			dest->unread++;
+	}
+
+	if (fp) fclose(fp);
+
+	return dest->last_num;
+}
+
+static gint mh_remove_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
+{
+	gchar *file;
+
+	g_return_val_if_fail(item != NULL, -1);
+
+	file = mh_fetch_msg(folder, item, msginfo->msgnum);
+	g_return_val_if_fail(file != NULL, -1);
+
+	if (unlink(file) < 0) {
+		FILE_OP_ERROR(file, "unlink");
+		g_free(file);
+		return -1;
+	}
+	g_free(file);
+
+	item->total--;
+	item->updated = TRUE;
+	if (MSG_IS_NEW(msginfo->flags))
+		item->new--;
+	if (MSG_IS_UNREAD(msginfo->flags))
+		item->unread--;
+	MSG_SET_TMP_FLAGS(msginfo->flags, MSG_INVALID);
+
+	if (msginfo->msgnum == item->last_num)
+		item->last_num = mh_scan_folder_full(folder, item, FALSE);
+
+	return 0;
+}
+
+static gint mh_remove_all_msg(Folder *folder, FolderItem *item)
+{
+	gchar *path;
+	gint val;
+
+	g_return_val_if_fail(item != NULL, -1);
+
+	path = folder_item_get_path(item);
+	g_return_val_if_fail(path != NULL, -1);
+	val = remove_all_numbered_files(path);
+	g_free(path);
+	if (val == 0) {
+		item->new = item->unread = item->total = 0;
+		item->last_num = 0;
+		item->updated = TRUE;
+	}
+
+	return val;
+}
+
+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)
+		return TRUE;
+
+	return FALSE;
+}
+
+static gint mh_close(Folder *folder, FolderItem *item)
+{
+	return 0;
+}
+
+static gint mh_scan_folder_full(Folder *folder, FolderItem *item,
+				gboolean count_sum)
+{
+	gchar *path;
+	DIR *dp;
+	struct dirent *d;
+	gint max = 0;
+	gint num;
+	gint n_msg = 0;
+
+	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 &&
+		    dirent_is_regular_file(d)) {
+			n_msg++;
+			if (max < num)
+				max = num;
+		}
+	}
+
+	closedir(dp);
+
+	if (n_msg == 0)
+		item->new = item->unread = item->total = 0;
+	else if (count_sum) {
+		gint new, unread, total, min, max_;
+
+		procmsg_get_mark_sum
+			(item, &new, &unread, &total, &min, &max_, 0);
+
+		if (n_msg > total) {
+			item->unmarked_num = new = n_msg - total;
+			unread += n_msg - total;
+		} else
+			item->unmarked_num = 0;
+
+		item->new = new;
+		item->unread = unread;
+		item->total = n_msg;
+	}
+
+	item->updated = TRUE;
+
+	debug_print(_("Last number in dir %s = %d\n"), item->path, max);
+	item->last_num = max;
+
+	return 0;
+}
+
+static gint mh_scan_folder(Folder *folder, FolderItem *item)
+{
+	return mh_scan_folder_full(folder, item, TRUE);
+}
+
+static gint mh_scan_tree(Folder *folder)
+{
+	FolderItem *item;
+	gchar *rootpath;
+
+	g_return_val_if_fail(folder != NULL, -1);
+
+	if (!folder->node) {
+		item = folder_item_new(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 -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) \
+{ \
+	if (!is_dir_exist(dir)) { \
+		if (is_file_exist(dir)) { \
+			g_warning(_("File `%s' already exists.\n" \
+				    "Can't create folder."), dir); \
+			return -1; \
+		} \
+		if (make_dir(dir) < 0) \
+			return -1; \
+	} \
+}
+
+static gint mh_create_tree(Folder *folder)
+{
+	gchar *rootpath;
+
+	g_return_val_if_fail(folder != NULL, -1);
+
+	CHDIR_RETURN_VAL_IF_FAIL(get_home_dir(), -1);
+	rootpath = LOCAL_FOLDER(folder)->rootpath;
+	MAKE_DIR_IF_NOT_EXIST(rootpath);
+	CHDIR_RETURN_VAL_IF_FAIL(rootpath, -1);
+	MAKE_DIR_IF_NOT_EXIST(INBOX_DIR);
+	MAKE_DIR_IF_NOT_EXIST(OUTBOX_DIR);
+	MAKE_DIR_IF_NOT_EXIST(QUEUE_DIR);
+	MAKE_DIR_IF_NOT_EXIST(DRAFT_DIR);
+	MAKE_DIR_IF_NOT_EXIST(TRASH_DIR);
+
+	return 0;
+}
+
+#undef MAKE_DIR_IF_NOT_EXIST
+
+static FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
+				    const gchar *name)
+{
+	gchar *path;
+	gchar *fs_name;
+	gchar *fullpath;
+	FolderItem *new_item;
+
+	g_return_val_if_fail(folder != NULL, NULL);
+	g_return_val_if_fail(parent != NULL, NULL);
+	g_return_val_if_fail(name != NULL, NULL);
+
+	path = folder_item_get_path(parent);
+	fs_name = g_filename_from_utf8(name, -1, NULL, NULL, NULL);
+	fullpath = g_strconcat(path, G_DIR_SEPARATOR_S,
+			       fs_name ? fs_name : name, NULL);
+	g_free(fs_name);
+	g_free(path);
+
+	if (make_dir(fullpath) < 0) {
+		g_free(fullpath);
+		return NULL;
+	}
+
+	g_free(fullpath);
+
+	if (parent->path)
+		path = g_strconcat(parent->path, G_DIR_SEPARATOR_S, name,
+				   NULL);
+	else
+		path = g_strdup(name);
+	new_item = folder_item_new(name, path);
+	folder_item_append(parent, new_item);
+	g_free(path);
+
+	return new_item;
+}
+
+static gint mh_rename_folder(Folder *folder, FolderItem *item,
+			     const gchar *name)
+{
+	gchar *fs_name;
+	gchar *oldpath;
+	gchar *dirname;
+	gchar *newpath;
+	gchar *paths[2];
+
+	g_return_val_if_fail(folder != NULL, -1);
+	g_return_val_if_fail(item != NULL, -1);
+	g_return_val_if_fail(item->path != NULL, -1);
+	g_return_val_if_fail(name != NULL, -1);
+
+	oldpath = folder_item_get_path(item);
+	dirname = g_dirname(oldpath);
+	fs_name = g_filename_from_utf8(name, -1, NULL, NULL, NULL);
+	newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S,
+			      fs_name ? fs_name : name, NULL);
+	g_free(fs_name);
+	g_free(dirname);
+
+	if (rename(oldpath, newpath) < 0) {
+		FILE_OP_ERROR(oldpath, "rename");
+		g_free(oldpath);
+		g_free(newpath);
+		return -1;
+	}
+
+	g_free(oldpath);
+	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);
+		g_free(dirname);
+	} else
+		newpath = g_strdup(name);
+
+	g_free(item->name);
+	item->name = g_strdup(name);
+
+	paths[0] = g_strdup(item->path);
+	paths[1] = newpath;
+	g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
+			mh_rename_folder_func, paths);
+
+	g_free(paths[0]);
+	g_free(paths[1]);
+	return 0;
+}
+
+static gint mh_remove_folder(Folder *folder, FolderItem *item)
+{
+	gchar *path;
+
+	g_return_val_if_fail(folder != NULL, -1);
+	g_return_val_if_fail(item != NULL, -1);
+	g_return_val_if_fail(item->path != NULL, -1);
+
+	path = folder_item_get_path(item);
+	if (remove_dir_recursive(path) < 0) {
+		g_warning("can't remove directory `%s'\n", path);
+		g_free(path);
+		return -1;
+	}
+
+	g_free(path);
+	folder_item_remove(item);
+	return 0;
+}
+
+
+static time_t mh_get_mtime(FolderItem *item)
+{
+	gchar *path;
+	struct stat s;
+
+	path = folder_item_get_path(item);
+	if (stat(path, &s) < 0) {
+		FILE_OP_ERROR(path, "stat");
+		return -1;
+	} else {
+		return MAX(s.st_mtime, s.st_ctime);
+	}
+}
+
+static GSList *mh_get_uncached_msgs(GHashTable *msg_table, FolderItem *item)
+{
+	gchar *path;
+	DIR *dp;
+	struct dirent *d;
+	GSList *newlist = NULL;
+	GSList *last = NULL;
+	MsgInfo *msginfo;
+	gint n_newmsg = 0;
+	gint num;
+
+	g_return_val_if_fail(item != NULL, NULL);
+
+	path = folder_item_get_path(item);
+	g_return_val_if_fail(path != NULL, NULL);
+	if (change_dir(path) < 0) {
+		g_free(path);
+		return NULL;
+	}
+	g_free(path);
+
+	if ((dp = opendir(".")) == NULL) {
+		FILE_OP_ERROR(item->path, "opendir");
+		return NULL;
+	}
+
+	debug_print("Searching uncached messages...\n");
+
+	if (msg_table) {
+		while ((d = readdir(dp)) != NULL) {
+			if ((num = to_number(d->d_name)) < 0) continue;
+
+			msginfo = g_hash_table_lookup
+				(msg_table, GUINT_TO_POINTER(num));
+
+			if (!msginfo) {
+				/* not found in the cache (uncached message) */
+				msginfo = mh_parse_msg(d->d_name, item);
+				if (!msginfo) continue;
+
+				if (!newlist)
+					last = newlist =
+						g_slist_append(NULL, msginfo);
+				else {
+					last = g_slist_append(last, msginfo);
+					last = last->next;
+				}
+				n_newmsg++;
+			}
+		}
+	} else {
+		/* discard all previous cache */
+		while ((d = readdir(dp)) != NULL) {
+			if (to_number(d->d_name) < 0) continue;
+
+			msginfo = mh_parse_msg(d->d_name, item);
+			if (!msginfo) continue;
+
+			if (!newlist)
+				last = newlist = g_slist_append(NULL, msginfo);
+			else {
+				last = g_slist_append(last, msginfo);
+				last = last->next;
+			}
+			n_newmsg++;
+		}
+	}
+
+	closedir(dp);
+
+	if (n_newmsg)
+		debug_print("%d uncached message(s) found.\n", n_newmsg);
+	else
+		debug_print("done.\n");
+
+	/* sort new messages in numerical order */
+	if (newlist && item->sort_key == SORT_BY_NONE) {
+		debug_print("Sorting uncached messages in numerical order...\n");
+		newlist = g_slist_sort
+			(newlist, (GCompareFunc)procmsg_cmp_msgnum_for_sort);
+		debug_print("done.\n");
+	}
+
+	return newlist;
+}
+
+static MsgInfo *mh_parse_msg(const gchar *file, FolderItem *item)
+{
+	MsgInfo *msginfo;
+	MsgFlags flags;
+
+	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) {
+		MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
+	}
+
+	msginfo = procheader_parse_file(file, flags, FALSE);
+	if (!msginfo) return NULL;
+
+	msginfo->msgnum = atoi(file);
+	msginfo->folder = item;
+
+	return msginfo;
+}
+
+#if 0
+static gboolean mh_is_maildir_one(const gchar *path, const gchar *dir)
+{
+	gchar *entry;
+	gboolean result;
+
+	entry = g_strconcat(path, G_DIR_SEPARATOR_S, dir, NULL);
+	result = is_dir_exist(entry);
+	g_free(entry);
+
+	return result;
+}
+
+/*
+ * check whether PATH is a Maildir style mailbox.
+ * This is the case if the 3 subdir: new, cur, tmp are existing.
+ * This functon assumes that entry is an directory
+ */
+static gboolean mh_is_maildir(const gchar *path)
+{
+	return mh_is_maildir_one(path, "new") &&
+	       mh_is_maildir_one(path, "cur") &&
+	       mh_is_maildir_one(path, "tmp");
+}
+#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 *fs_path;
+	gchar *entry;
+	gchar *utf8entry;
+	gchar *utf8name;
+	gint n_msg = 0;
+
+	g_return_if_fail(item != NULL);
+	g_return_if_fail(item->folder != NULL);
+
+	folder = item->folder;
+
+	fs_path = item->path ?
+		g_filename_from_utf8(item->path, -1, NULL, NULL, NULL)
+		: g_strdup(".");
+	if (!fs_path)
+		fs_path = g_strdup(item->path);
+	dp = opendir(fs_path);
+	if (!dp) {
+		FILE_OP_ERROR(fs_path, "opendir");
+		g_free(fs_path);
+		return;
+	}
+	g_free(fs_path);
+
+	debug_print("scanning %s ...\n",
+		    item->path ? item->path
+		    : LOCAL_FOLDER(item->folder)->rootpath);
+	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 = g_filename_to_utf8(d->d_name, -1, NULL, NULL, NULL);
+		if (!utf8name)
+			utf8name = g_strdup(d->d_name);
+
+		if (item->path)
+			utf8entry = g_strconcat(item->path, G_DIR_SEPARATOR_S,
+						utf8name, NULL);
+		else
+			utf8entry = g_strdup(utf8name);
+		entry = g_filename_from_utf8(utf8entry, -1, NULL, NULL, NULL);
+		if (!entry)
+			entry = g_strdup(utf8entry);
+
+		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
+
+			node = item->node;
+			for (node = node->children; node != NULL; node = node->next) {
+				FolderItem *cur_item = FOLDER_ITEM(node->data);
+				if (!strcmp2(cur_item->path, utf8entry)) {
+					new_item = cur_item;
+					break;
+				}
+			}
+			if (!new_item) {
+				debug_print("new folder '%s' found.\n", entry);
+				new_item = folder_item_new(utf8name, utf8entry);
+				folder_item_append(item, new_item);
+			}
+
+			if (!item->path) {
+				if (!folder->inbox &&
+				    !strcmp(d->d_name, INBOX_DIR)) {
+					new_item->stype = F_INBOX;
+					folder->inbox = new_item;
+				} else if (!folder->outbox &&
+					   !strcmp(d->d_name, OUTBOX_DIR)) {
+					new_item->stype = F_OUTBOX;
+					folder->outbox = new_item;
+				} else if (!folder->draft &&
+					   !strcmp(d->d_name, DRAFT_DIR)) {
+					new_item->stype = F_DRAFT;
+					folder->draft = new_item;
+				} else if (!folder->queue &&
+					   !strcmp(d->d_name, QUEUE_DIR)) {
+					new_item->stype = F_QUEUE;
+					folder->queue = new_item;
+				} else if (!folder->trash &&
+					   !strcmp(d->d_name, TRASH_DIR)) {
+					new_item->stype = F_TRASH;
+					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);
+
+	if (item->path) {
+		gint new, unread, total, min, max;
+
+		procmsg_get_mark_sum
+			(item, &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;
+		item->updated = TRUE;
+	}
+}
+
+static gboolean mh_rename_folder_func(GNode *node, gpointer data)
+{
+	FolderItem *item = node->data;
+	gchar **paths = data;
+	const gchar *oldpath = paths[0];
+	const gchar *newpath = paths[1];
+	gchar *base;
+	gchar *new_itempath;
+	gint oldpathlen;
+
+	oldpathlen = strlen(oldpath);
+	if (strncmp(oldpath, item->path, oldpathlen) != 0) {
+		g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
+		return TRUE;
+	}
+
+	base = item->path + oldpathlen;
+	while (*base == G_DIR_SEPARATOR) base++;
+	if (*base == '\0')
+		new_itempath = g_strdup(newpath);
+	else
+		new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
+					   NULL);
+	g_free(item->path);
+	item->path = new_itempath;
+
+	return FALSE;
+}