0.9.5claws30
[claws.git] / src / folder.c
index 962fd209957cf6ccbd7ba2f7ad9e495132113bba..236dd35f0adfee382066146ddb579ad3e4d9dda9 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2002 Hiroyuki Yamamoto
+ * 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
 #include "account.h"
 #include "filtering.h"
 #include "scoring.h"
-#include "prefs_folder_item.h"
 #include "procheader.h"
 #include "hooks.h"
 #include "log.h"
+#include "folder_item_prefs.h"
 
 /* Dependecies to be removed ?! */
 #include "prefs_common.h"
 #include "prefs_account.h"
-#include "prefs_folder_item.h"
 
 static GList *folder_list = NULL;
 
@@ -73,34 +72,43 @@ static void folder_get_persist_prefs_recursive
 static gboolean persist_prefs_free     (gpointer key, gpointer val, gpointer data);
 void folder_item_read_cache            (FolderItem *item);
 void folder_item_free_cache            (FolderItem *item);
+gint folder_item_scan_full             (FolderItem *item, gboolean filtering);
 
-Folder *folder_new(FolderType type, const gchar *name, const gchar *path)
+static GSList *classlist;
+
+void folder_system_init(void)
+{
+       folder_register_class(mh_get_class());
+       folder_register_class(imap_get_class());
+       folder_register_class(news_get_class());
+       folder_register_class(mbox_get_class());
+}
+
+GSList *folder_get_class_list(void)
+{
+       return classlist;
+}
+
+void folder_register_class(FolderClass *klass)
+{
+       debug_print("registering folder class %s\n", klass->idstr);
+       classlist = g_slist_append(classlist, klass);
+}
+
+Folder *folder_new(FolderClass *klass, const gchar *name, const gchar *path)
 {
        Folder *folder = NULL;
        FolderItem *item;
 
+       g_return_val_if_fail(klass != NULL, NULL);
+
        name = name ? name : path;
-       switch (type) {
-       case F_MBOX:
-               folder = mbox_folder_new(name, path);
-               break;
-       case F_MH:
-               folder = mh_folder_new(name, path);
-               break;
-       case F_IMAP:
-               folder = imap_folder_new(name, path);
-               break;
-       case F_NEWS:
-               folder = news_folder_new(name, path);
-               break;
-       default:
-               return NULL;
-       }
+       folder = klass->new_folder(name, path);
 
        /* Create root folder item */
        item = folder_item_new(folder, name, NULL);
        item->folder = folder;
-       folder->node = g_node_new(item);
+       folder->node = item->node = g_node_new(item);
        folder->data = NULL;
 
        return folder;
@@ -119,18 +127,6 @@ static void folder_init(Folder *folder, const gchar *name)
        folder->draft = NULL;
        folder->queue = NULL;
        folder->trash = NULL;
-
-       /* Init Folder functions */
-       folder->item_new = NULL;
-       folder->item_destroy = NULL;
-       folder->fetch_msg = NULL;
-       folder->get_msginfo = NULL;
-       folder->get_msginfos = NULL;
-       folder->get_num_list = NULL;
-       folder->ui_func = NULL;
-       folder->ui_func_data = NULL;
-       folder->change_flags = NULL;
-       folder->check_msgnum_validity = NULL;
 }
 
 void folder_local_folder_init(Folder *folder, const gchar *name,
@@ -150,13 +146,14 @@ void folder_remote_folder_init(Folder *folder, const gchar *name,
 void folder_destroy(Folder *folder)
 {
        g_return_if_fail(folder != NULL);
-       g_return_if_fail(folder->destroy != NULL);
-
-       folder->destroy(folder);
+       g_return_if_fail(folder->klass->destroy_folder != NULL);
 
        folder_list = g_list_remove(folder_list, folder);
 
        folder_tree_destroy(folder);
+
+       folder->klass->destroy_folder(folder);
+
        g_free(folder->name);
        g_free(folder);
 }
@@ -176,26 +173,12 @@ void folder_remote_folder_destroy(RemoteFolder *rfolder)
                session_destroy(rfolder->session);
 }
 
-#if 0
-Folder *mbox_folder_new(const gchar *name, const gchar *path)
-{
-       /* not yet implemented */
-       return NULL;
-}
-
-Folder *maildir_folder_new(const gchar *name, const gchar *path)
-{
-       /* not yet implemented */
-       return NULL;
-}
-#endif
-
 FolderItem *folder_item_new(Folder *folder, const gchar *name, const gchar *path)
 {
        FolderItem *item = NULL;
 
-       if (folder->item_new) {
-               item = folder->item_new(folder);
+       if (folder->klass->item_new) {
+               item = folder->klass->item_new(folder);
        } else {
                item = g_new0(FolderItem, 1);
        }
@@ -206,18 +189,20 @@ FolderItem *folder_item_new(Folder *folder, const gchar *name, const gchar *path
        item->name = g_strdup(name);
        item->path = g_strdup(path);
        item->mtime = 0;
-       item->new = 0;
-       item->unread = 0;
-       item->unreadmarked = 0;
-       item->total = 0;
+       item->new_msgs = 0;
+       item->unread_msgs = 0;
+       item->unreadmarked_msgs = 0;
+       item->total_msgs = 0;
        item->last_num = -1;
        item->cache = NULL;
        item->no_sub = FALSE;
        item->no_select = FALSE;
        item->collapsed = FALSE;
+       item->thread_collapsed = FALSE;
        item->threaded  = TRUE;
        item->ret_rcpt  = FALSE;
        item->opened    = FALSE;
+       item->node = NULL;
        item->parent = NULL;
        item->folder = NULL;
        item->account = NULL;
@@ -225,26 +210,41 @@ FolderItem *folder_item_new(Folder *folder, const gchar *name, const gchar *path
        item->mark_queue = NULL;
        item->data = NULL;
 
-       item->prefs = prefs_folder_item_new();
+       item->prefs = folder_item_prefs_new();
 
        return item;
 }
 
 void folder_item_append(FolderItem *parent, FolderItem *item)
 {
-       GNode *node;
-
        g_return_if_fail(parent != NULL);
        g_return_if_fail(parent->folder != NULL);
+       g_return_if_fail(parent->node != NULL);
        g_return_if_fail(item != NULL);
 
-       node = parent->folder->node;
-       node = g_node_find(node, G_PRE_ORDER, G_TRAVERSE_ALL, parent);
-       g_return_if_fail(node != NULL);
-
        item->parent = parent;
        item->folder = parent->folder;
-       g_node_append_data(node, item);
+       item->node = g_node_append_data(parent->node, item);
+}
+
+static gboolean folder_item_remove_func(GNode *node, gpointer data)
+{
+       FolderItem *item = FOLDER_ITEM(node->data);
+       FolderUpdateData hookdata;
+
+       if (item->cache != NULL) {
+               msgcache_destroy(item->cache);
+               item->cache = NULL;
+       }
+
+       hookdata.folder = item->folder;
+       hookdata.update_flags = FOLDER_TREE_CHANGED | FOLDER_REMOVE_FOLDERITEM;
+       hookdata.item = item;
+       hooks_invoke(FOLDER_UPDATE_HOOKLIST, &hookdata);
+
+       folder_item_destroy(item);
+
+       return FALSE;
 }
 
 void folder_item_remove(FolderItem *item)
@@ -253,31 +253,64 @@ void folder_item_remove(FolderItem *item)
 
        g_return_if_fail(item != NULL);
        g_return_if_fail(item->folder != NULL);
+       g_return_if_fail(item->node != NULL);
 
-       node = item->folder->node;
-       node = g_node_find(node, G_PRE_ORDER, G_TRAVERSE_ALL, item);
-       g_return_if_fail(node != NULL);
+       node = item->node;
 
-       /* TODO: free all FolderItem's first */
        if (item->folder->node == node)
                item->folder->node = NULL;
+
+       g_node_traverse(node, G_POST_ORDER, G_TRAVERSE_ALL, -1,
+                       folder_item_remove_func, NULL);
        g_node_destroy(node);
 }
 
+void folder_item_remove_children(FolderItem *item)
+{
+       GNode *node, *next;
+
+       g_return_if_fail(item != NULL);
+       g_return_if_fail(item->folder != NULL);
+       g_return_if_fail(item->node != NULL);
+
+       node = item->node->children;
+       while (node != NULL) {
+               next = node->next;
+               folder_item_remove(FOLDER_ITEM(node->data));
+               node = next;
+       }
+}
+
 void folder_item_destroy(FolderItem *item)
 {
+       Folder *folder;
+
        g_return_if_fail(item != NULL);
 
-       debug_print("Destroying folder item %s\n", item->path);
+       folder = item->folder;
+       if (folder) {
+               if (folder->inbox == item)
+                       folder->inbox = NULL;
+               else if (folder->outbox == item)
+                       folder->outbox = NULL;
+               else if (folder->draft == item)
+                       folder->draft = NULL;
+               else if (folder->queue == item)
+                       folder->queue = NULL;
+               else if (folder->trash == item)
+                       folder->trash = NULL;
+       }
 
        if (item->cache)
                folder_item_free_cache(item);
+       if (item->prefs)
+               folder_item_prefs_free(item->prefs);
        g_free(item->name);
        g_free(item->path);
 
        if (item->folder != NULL) {
-               if(item->folder->item_destroy) {
-                       item->folder->item_destroy(item->folder, item);
+               if(item->folder->klass->item_destroy) {
+                       item->folder->klass->item_destroy(item->folder, item);
                } else {
                        g_free(item);
                }
@@ -315,22 +348,21 @@ gboolean folder_tree_destroy_func(GNode *node, gpointer data) {
 
 void folder_tree_destroy(Folder *folder)
 {
+       GNode *node;
+
        g_return_if_fail(folder != NULL);
-       g_return_if_fail(folder->node != NULL);
-       
-       prefs_scoring_clear();
-       prefs_filtering_clear();
 
-       g_node_traverse(folder->node, G_POST_ORDER, G_TRAVERSE_ALL, -1, folder_tree_destroy_func, NULL);
-       if (folder->node)
-               g_node_destroy(folder->node);
+       node = folder->node;
+       
+       prefs_scoring_clear_folder(folder);
+       prefs_filtering_clear_folder(folder);
 
-       folder->inbox = NULL;
-       folder->outbox = NULL;
-       folder->draft = NULL;
-       folder->queue = NULL;
-       folder->trash = NULL;
-       folder->node = NULL;
+       if (node != NULL) {
+               g_node_traverse(node, G_POST_ORDER, G_TRAVERSE_ALL, -1,
+                               folder_tree_destroy_func, NULL);
+               g_node_destroy(node);
+               folder->node = NULL;
+       }
 }
 
 void folder_add(Folder *folder)
@@ -343,20 +375,20 @@ void folder_add(Folder *folder)
 
        for (i = 0, cur = folder_list; cur != NULL; cur = cur->next, i++) {
                cur_folder = FOLDER(cur->data);
-               if (folder->type == F_MH) {
-                       if (cur_folder->type != F_MH) break;
-               } else if (folder->type == F_MBOX) {
-                       if (cur_folder->type != F_MH &&
-                           cur_folder->type != F_MBOX) break;
-               } else if (folder->type == F_IMAP) {
-                       if (cur_folder->type != F_MH &&
-                           cur_folder->type != F_MBOX &&
-                           cur_folder->type != F_IMAP) break;
-               } else if (folder->type == F_NEWS) {
-                       if (cur_folder->type != F_MH &&
-                           cur_folder->type != F_MBOX &&
-                           cur_folder->type != F_IMAP &&
-                           cur_folder->type != F_NEWS) break;
+               if (FOLDER_TYPE(folder) == F_MH) {
+                       if (FOLDER_TYPE(cur_folder) != F_MH) break;
+               } else if (FOLDER_TYPE(folder) == F_MBOX) {
+                       if (FOLDER_TYPE(cur_folder) != F_MH &&
+                           FOLDER_TYPE(cur_folder) != F_MBOX) break;
+               } else if (FOLDER_TYPE(folder) == F_IMAP) {
+                       if (FOLDER_TYPE(cur_folder) != F_MH &&
+                           FOLDER_TYPE(cur_folder) != F_MBOX &&
+                           FOLDER_TYPE(cur_folder) != F_IMAP) break;
+               } else if (FOLDER_TYPE(folder) == F_NEWS) {
+                       if (FOLDER_TYPE(cur_folder) != F_MH &&
+                           FOLDER_TYPE(cur_folder) != F_MBOX &&
+                           FOLDER_TYPE(cur_folder) != F_IMAP &&
+                           FOLDER_TYPE(cur_folder) != F_NEWS) break;
                }
        }
 
@@ -417,7 +449,7 @@ void folder_write_list(void)
 
        fputs("</folderlist>\n", pfile->fp);
 
-       if (prefs_write_close(pfile) < 0)
+       if (prefs_file_close(pfile) < 0)
                g_warning("failed to write folder list.\n");
 }
 
@@ -427,6 +459,7 @@ gboolean folder_scan_tree_func(GNode *node, gpointer data)
        FolderItem *item = (FolderItem *)node->data;
        
        folder_item_restore_persist_prefs(item, pptable);
+       folder_item_scan_full(item, FALSE);
 
        return FALSE;
 }
@@ -434,14 +467,24 @@ gboolean folder_scan_tree_func(GNode *node, gpointer data)
 void folder_scan_tree(Folder *folder)
 {
        GHashTable *pptable;
+       FolderUpdateData hookdata;
        
-       if (!folder->scan_tree)
+       if (!folder->klass->scan_tree)
                return;
        
        pptable = folder_persist_prefs_new(folder);
+
+       /*
+        * should be changed and tree update should be done without 
+        * destroying the tree first
+        */
        folder_tree_destroy(folder);
+       folder->klass->scan_tree(folder);
 
-       folder->scan_tree(folder);
+       hookdata.folder = folder;
+       hookdata.update_flags = FOLDER_TREE_CHANGED;
+       hookdata.item = NULL;
+       hooks_invoke(FOLDER_UPDATE_HOOKLIST, &hookdata);
 
        g_node_traverse(folder->node, G_POST_ORDER, G_TRAVERSE_ALL, -1, folder_scan_tree_func, pptable);
        folder_persist_prefs_free(pptable);
@@ -454,20 +497,27 @@ void folder_scan_tree(Folder *folder)
 FolderItem *folder_create_folder(FolderItem *parent, const gchar *name)
 {
        FolderItem *new_item;
+       FolderUpdateData hookdata;
 
-       new_item = parent->folder->create_folder(parent->folder, parent, name);
-       if (new_item)
+       new_item = parent->folder->klass->create_folder(parent->folder, parent, name);
+       if (new_item) {
                new_item->cache = msgcache_new();
 
+               hookdata.folder = new_item->folder;
+               hookdata.update_flags = FOLDER_TREE_CHANGED | FOLDER_NEW_FOLDERITEM;
+               hookdata.item = new_item;
+               hooks_invoke(FOLDER_UPDATE_HOOKLIST, &hookdata);
+       }
+
        return new_item;
 }
 
 struct TotalMsgCount
 {
-       guint new;
-       guint unread;
-       guint unreadmarked;
-       guint total;
+       guint new_msgs;
+       guint unread_msgs;
+       guint unreadmarked_msgs;
+       guint total_msgs;
 };
 
 struct FuncToAllFoldersData
@@ -514,26 +564,133 @@ static void folder_count_total_msgs_func(FolderItem *item, gpointer data)
 {
        struct TotalMsgCount *count = (struct TotalMsgCount *)data;
 
-       count->new += item->new;
-       count->unread += item->unread;
-       count->unreadmarked += item->unreadmarked;
-       count->total += item->total;
+       count->new_msgs += item->new_msgs;
+       count->unread_msgs += item->unread_msgs;
+       count->unreadmarked_msgs += item->unreadmarked_msgs;
+       count->total_msgs += item->total_msgs;
+}
+
+struct TotalMsgStatus
+{
+        guint new;
+        guint unread;
+       guint total;
+       GString *str;
+};
+
+static gboolean folder_get_status_full_all_func(GNode *node, gpointer data)
+{
+       FolderItem *item;
+       struct TotalMsgStatus *status = (struct TotalMsgStatus *)data;
+       gchar *id;
+       g_return_val_if_fail(node->data != NULL, FALSE);
+       item = FOLDER_ITEM(node->data);
+
+       if (!item->path) return FALSE;
+
+       status->new += item->new_msgs;
+       status->unread += item->unread_msgs;
+       status->total += item->total_msgs;
+
+       if (status->str) {
+               id = folder_item_get_identifier(item);
+               g_string_sprintfa(status->str, "%5d %5d %5d %s\n",
+                                 item->new_msgs, item->unread_msgs,
+                                 item->total_msgs, id);
+               g_free(id);
+       }
+       return FALSE;
+ }
+static void folder_get_status_full_all(GString *str, guint *new, guint *unread,
+                                      guint *total)
+{
+       GList *list;
+       Folder *folder;
+       struct TotalMsgStatus status;
+       status.new = status.unread = status.total = 0;
+       status.str = str;
+       debug_print("Counting total number of messages...\n");
+       for (list = folder_list; list != NULL; list = list->next) {
+               folder = FOLDER(list->data);
+               if (folder->node)
+                       g_node_traverse(folder->node, G_PRE_ORDER,
+                                       G_TRAVERSE_ALL, -1,
+                                       folder_get_status_full_all_func,
+                                       &status);
+       }
+       *new = status.new;
+       *unread = status.unread;
+       *total = status.total;
+}
+
+gchar *folder_get_status(GPtrArray *folders, gboolean full)
+{
+       guint new, unread, total;
+       GString *str;
+       gint i;
+       gchar *ret;
+
+       new = unread = total = 0;
+
+       str = g_string_new(NULL);
+
+       if (folders) {
+               for (i = 0; i < folders->len; i++) {
+                       FolderItem *item;
+
+                       item = g_ptr_array_index(folders, i);
+                       new += item->new_msgs;
+                       unread += item->unread_msgs;
+                       total += item->total_msgs;
+
+                       if (full) {
+                               gchar *id;
+
+                               id = folder_item_get_identifier(item);
+                               g_string_sprintfa(str, "%5d %5d %5d %s\n",
+                                                 item->new_msgs, item->unread_msgs,
+                                                 item->total_msgs, id);
+                               g_free(id);
+                       }
+               }
+       } else {
+               folder_get_status_full_all(full ? str : NULL,
+                                          &new, &unread, &total);
+       }
+
+       if (full)
+               g_string_sprintfa(str, "%5d %5d %5d\n", new, unread, total);
+       else
+               g_string_sprintfa(str, "%d %d %d\n", new, unread, total);
+
+       ret = str->str;
+       g_string_free(str, FALSE);
+       return ret;
 }
 
-void folder_count_total_msgs(guint *new, guint *unread, guint *unreadmarked, guint *total)
+void folder_count_total_msgs(guint *new_msgs, guint *unread_msgs, guint *unreadmarked_msgs, guint *total_msgs)
 {
        struct TotalMsgCount count;
 
-       count.new = count.unread = count.unreadmarked = count.total = 0;
+       count.new_msgs = count.unread_msgs = count.unreadmarked_msgs = count.total_msgs = 0;
 
        debug_print("Counting total number of messages...\n");
 
        folder_func_to_all_folders(folder_count_total_msgs_func, &count);
 
-       *new = count.new;
-       *unread = count.unread;
-       *unreadmarked = count.unreadmarked;
-       *total = count.total;
+       *new_msgs = count.new_msgs;
+       *unread_msgs = count.unread_msgs;
+       *unreadmarked_msgs = count.unreadmarked_msgs;
+       *total_msgs = count.total_msgs;
 }
 
 Folder *folder_find_from_path(const gchar *path)
@@ -543,7 +700,7 @@ Folder *folder_find_from_path(const gchar *path)
 
        for (list = folder_list; list != NULL; list = list->next) {
                folder = list->data;
-               if ((folder->type == F_MH || folder->type == F_MBOX) &&
+               if ((FOLDER_TYPE(folder) == F_MH || FOLDER_TYPE(folder) == F_MBOX) &&
                    !path_cmp(LOCAL_FOLDER(folder)->rootpath, path))
                        return folder;
        }
@@ -551,14 +708,14 @@ Folder *folder_find_from_path(const gchar *path)
        return NULL;
 }
 
-Folder *folder_find_from_name(const gchar *name, FolderType type)
+Folder *folder_find_from_name(const gchar *name, FolderClass *klass)
 {
        GList *list;
        Folder *folder;
 
        for (list = folder_list; list != NULL; list = list->next) {
                folder = list->data;
-               if (folder->type == type && strcmp2(name, folder->name) == 0)
+               if (folder->klass == klass && strcmp2(name, folder->name) == 0)
                        return folder;
        }
 
@@ -594,51 +751,28 @@ FolderItem *folder_find_item_from_path(const gchar *path)
        return d[1];
 }
 
-static const struct {
-       gchar *str;
-       FolderType type;
-} type_str_table[] = {
-       {"#mh"     , F_MH},
-       {"#mbox"   , F_MBOX},
-       {"#maildir", F_MAILDIR},
-       {"#imap"   , F_IMAP},
-       {"#news"   , F_NEWS}
-};
-
-static gchar *folder_get_type_string(FolderType type)
+FolderClass *folder_get_class_from_string(const gchar *str)
 {
-       gint i;
+       GSList *classlist;
 
-       for (i = 0; i < sizeof(type_str_table) / sizeof(type_str_table[0]);
-            i++) {
-               if (type_str_table[i].type == type)
-                       return type_str_table[i].str;
+       classlist = folder_get_class_list();
+       for (; classlist != NULL; classlist = g_slist_next(classlist)) {
+               FolderClass *class = (FolderClass *) classlist->data;
+               if (g_strcasecmp(class->idstr, str) == 0)
+                       return class;
        }
 
        return NULL;
 }
 
-static FolderType folder_get_type_from_string(const gchar *str)
-{
-       gint i;
-
-       for (i = 0; i < sizeof(type_str_table) / sizeof(type_str_table[0]);
-            i++) {
-               if (g_strcasecmp(type_str_table[i].str, str) == 0)
-                       return type_str_table[i].type;
-       }
-
-       return F_UNKNOWN;
-}
-
 gchar *folder_get_identifier(Folder *folder)
 {
        gchar *type_str;
 
        g_return_val_if_fail(folder != NULL, NULL);
 
-       type_str = folder_get_type_string(folder->type);
-       return g_strconcat(type_str, "/", folder->name, NULL);
+       type_str = folder->klass->idstr;
+       return g_strconcat("#", type_str, "/", folder->name, NULL);
 }
 
 gchar *folder_item_get_identifier(FolderItem *item)
@@ -664,7 +798,7 @@ FolderItem *folder_find_item_from_identifier(const gchar *identifier)
        gchar *p;
        gchar *name;
        gchar *path;
-       FolderType type;
+       FolderClass *class;
 
        g_return_val_if_fail(identifier != NULL, NULL);
 
@@ -678,8 +812,8 @@ FolderItem *folder_find_item_from_identifier(const gchar *identifier)
                return folder_find_item_from_path(identifier);
        *p = '\0';
        p++;
-       type = folder_get_type_from_string(str);
-       if (type == F_UNKNOWN)
+       class = folder_get_class_from_string(&str[1]);
+       if (class == NULL)
                return folder_find_item_from_path(identifier);
 
        name = p;
@@ -689,7 +823,7 @@ FolderItem *folder_find_item_from_identifier(const gchar *identifier)
        *p = '\0';
        p++;
 
-       folder = folder_find_from_name(name, type);
+       folder = folder_find_from_name(name, class);
        if (!folder)
                return folder_find_item_from_path(identifier);
 
@@ -702,6 +836,68 @@ FolderItem *folder_find_item_from_identifier(const gchar *identifier)
        return d[1];
 }
 
+/**
+ * Get a displayable name for a FolderItem
+ *
+ * \param item FolderItem for that a name should be created
+ * \return Displayable name for item, returned string has to
+ *         be freed
+ */
+gchar *folder_item_get_name(FolderItem *item)
+{
+       gchar *name = NULL;
+
+       g_return_val_if_fail(item != NULL, g_strdup(""));
+
+       switch (item->stype) {
+       case F_INBOX:
+               name = g_strdup(!strcmp2(item->name, INBOX_DIR) ? _("Inbox") :
+                               item->name);
+               break;
+       case F_OUTBOX:
+               name = g_strdup(!strcmp2(item->name, OUTBOX_DIR) ? _("Sent") :
+                               item->name);
+               break;
+       case F_QUEUE:
+               name = g_strdup(!strcmp2(item->name, QUEUE_DIR) ? _("Queue") :
+                               item->name);
+               break;
+       case F_TRASH:
+               name = g_strdup(!strcmp2(item->name, TRASH_DIR) ? _("Trash") :
+                               item->name);
+               break;
+       case F_DRAFT:
+               name = g_strdup(!strcmp2(item->name, DRAFT_DIR) ? _("Drafts") :
+                               item->name);
+               break;
+       default:
+               break;
+       }
+
+       if (name == NULL) {
+               /*
+                * should probably be done by a virtual function,
+                * the folder knows the ui string and how to abbrev
+               */
+               if (!item->parent) {
+                       name = g_strconcat(item->name, " (", item->folder->klass->uistr, ")", NULL);
+               } else {
+                       if (FOLDER_CLASS(item->folder) == news_get_class() &&
+                           item->path && !strcmp2(item->name, item->path))
+                               name = get_abbrev_newsgroup_name
+                                       (item->path,
+                                        prefs_common.ng_abbrev_len);
+                       else
+                               name = g_strdup(item->name);
+               }
+       }
+
+       if (name == NULL)
+               name = g_strdup("");
+
+       return name;
+}
+
 Folder *folder_get_default_folder(void)
 {
        return folder_list ? FOLDER(folder_list->data) : NULL;
@@ -776,7 +972,7 @@ void folder_set_missing_folders(void)
 
        for (list = folder_list; list != NULL; list = list->next) {
                folder = list->data;
-               if (folder->type != F_MH) continue;
+               if (FOLDER_TYPE(folder) != F_MH) continue;
                rootitem = FOLDER_ITEM(folder->node->data);
                g_return_if_fail(rootitem != NULL);
 
@@ -784,7 +980,7 @@ void folder_set_missing_folders(void)
                    folder->queue && folder->trash)
                        continue;
 
-               if (folder->create_tree(folder) < 0) {
+               if (folder->klass->create_tree(folder) < 0) {
                        g_warning("%s: can't create the folder tree.\n",
                                  LOCAL_FOLDER(folder)->rootpath);
                        continue;
@@ -827,83 +1023,15 @@ void folder_unref_account_all(PrefsAccount *account)
 
 #undef CREATE_FOLDER_IF_NOT_EXIST
 
-gchar *folder_get_path(Folder *folder)
-{
-       gchar *path;
-
-       g_return_val_if_fail(folder != NULL, NULL);
-
-       switch(FOLDER_TYPE(folder)) {
-
-               case F_MH:
-                       path = g_strdup(LOCAL_FOLDER(folder)->rootpath);
-                       break;
-
-               case F_IMAP:
-                       g_return_val_if_fail(folder->account != NULL, NULL);
-                       path = g_strconcat(get_imap_cache_dir(),
-                                          G_DIR_SEPARATOR_S,
-                                          folder->account->recv_server,
-                                          G_DIR_SEPARATOR_S,
-                                          folder->account->userid,
-                                          NULL);
-                       break;
-
-               case F_NEWS:
-                       g_return_val_if_fail(folder->account != NULL, NULL);
-                       path = g_strconcat(get_news_cache_dir(),
-                                          G_DIR_SEPARATOR_S,
-                                          folder->account->nntp_server,
-                                          NULL);
-                       break;
-
-               default:
-                       path = NULL;
-                       break;
-       }
-       
-       return path;
-}
-
 gchar *folder_item_get_path(FolderItem *item)
 {
-       gchar *folder_path;
-       gchar *path;
+       Folder *folder;
 
        g_return_val_if_fail(item != NULL, NULL);
+       folder = item->folder;
+       g_return_val_if_fail(folder != NULL, NULL);
 
-       if(FOLDER_TYPE(item->folder) != F_MBOX) {
-               folder_path = folder_get_path(item->folder);
-               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);
-       } else {
-               gchar *itempath;
-
-               itempath = mbox_get_virtual_path(item);
-               if (itempath == NULL)
-                       return NULL;
-               path = g_strconcat(get_mbox_cache_dir(),
-                                         G_DIR_SEPARATOR_S, itempath, NULL);
-               g_free(itempath);
-       }
-       return path;
+       return folder->klass->item_get_path(folder, item);
 }
 
 void folder_item_set_default_flags(FolderItem *dest, MsgFlags *flags)
@@ -917,16 +1045,12 @@ void folder_item_set_default_flags(FolderItem *dest, MsgFlags *flags)
                flags->perm_flags = 0;
        }
        flags->tmp_flags = MSG_CACHED;
-       if (dest->folder->type == F_MH) {
+       if (FOLDER_TYPE(dest->folder) == F_MH) {
                if (dest->stype == F_QUEUE) {
                        MSG_SET_TMP_FLAGS(*flags, MSG_QUEUED);
                } else if (dest->stype == F_DRAFT) {
                        MSG_SET_TMP_FLAGS(*flags, MSG_DRAFT);
                }
-       } else if (dest->folder->type == F_IMAP) {
-               MSG_SET_TMP_FLAGS(*flags, MSG_IMAP);
-       } else if (dest->folder->type == F_NEWS) {
-               MSG_SET_TMP_FLAGS(*flags, MSG_NEWS);
        }
 }
 
@@ -948,8 +1072,8 @@ static gint folder_sort_folder_list(gconstpointer a, gconstpointer b)
 
 gint folder_item_open(FolderItem *item)
 {
-       if(((item->folder->type == F_IMAP) && !item->no_select) || (item->folder->type == F_NEWS)) {
-               folder_item_scan(item);
+       if((item->folder->klass->scan_required != NULL) && (item->folder->klass->scan_required(item->folder, item))) {
+               folder_item_scan_full(item, TRUE);
        }
 
        /* Processing */
@@ -968,13 +1092,15 @@ gint folder_item_open(FolderItem *item)
        return 0;
 }
 
-void folder_item_close(FolderItem *item)
+gint folder_item_close(FolderItem *item)
 {
        GSList *mlist, *cur;
+       Folder *folder;
        
-       g_return_if_fail(item != NULL);
+       g_return_val_if_fail(item != NULL, -1);
 
-       if (item->new) {
+       if (item->new_msgs) {
+               folder_item_update_freeze();
                mlist = folder_item_get_msg_list(item);
                for (cur = mlist ; cur != NULL ; cur = cur->next) {
                        MsgInfo * msginfo;
@@ -985,21 +1111,32 @@ void folder_item_close(FolderItem *item)
                        procmsg_msginfo_free(msginfo);
                }
                g_slist_free(mlist);
+               folder_item_update_thaw();
        }               
 
        folder_item_write_cache(item);
        
-       folder_update_item(item, FALSE);
+       folder_item_update(item, F_ITEM_UPDATE_MSGCNT);
+
+       item->opened = FALSE;
+       folder = item->folder;
+
+       if (folder->klass->close == NULL)
+               return 0;
 
+       return folder->klass->close(folder, item);
 }
 
-gint folder_item_scan(FolderItem *item)
+gint folder_item_scan_full(FolderItem *item, gboolean filtering)
 {
        Folder *folder;
-       GSList *folder_list = NULL, *cache_list = NULL, *folder_list_cur, *cache_list_cur, *new_list = NULL;
+       GSList *folder_list = NULL, *cache_list = NULL;
+       GSList *folder_list_cur, *cache_list_cur, *new_list = NULL;
+       GSList *exists_list = NULL, *elem;
+       GSList *newmsg_list = NULL;
        guint newcnt = 0, unreadcnt = 0, totalcnt = 0, unreadmarkedcnt = 0;
        guint cache_max_num, folder_max_num, cache_cur_num, folder_cur_num;
-       gboolean contentchange = FALSE;
+       gboolean update_flags = 0, old_uids_valid = FALSE;
     
        g_return_val_if_fail(item != NULL, -1);
        if (item->path == NULL) return -1;
@@ -1007,18 +1144,17 @@ gint folder_item_scan(FolderItem *item)
        folder = item->folder;
 
        g_return_val_if_fail(folder != NULL, -1);
-       g_return_val_if_fail(folder->get_num_list != NULL, -1);
+       g_return_val_if_fail(folder->klass->get_num_list != NULL, -1);
 
        debug_print("Scanning folder %s for cache changes.\n", item->path);
 
        /* Get list of messages for folder and cache */
-       if (folder->get_num_list(item->folder, item, &folder_list) < 0) {
+       if (folder->klass->get_num_list(item->folder, item, &folder_list, &old_uids_valid) < 0) {
                debug_print("Error fetching list of message numbers\n");
                return(-1);
        }
 
-       if (!folder->check_msgnum_validity || 
-           folder->check_msgnum_validity(folder, item)) {
+       if (old_uids_valid) {
                if (!item->cache)
                        folder_item_read_cache(item);
                cache_list = msgcache_get_msg_list(item->cache);
@@ -1066,18 +1202,18 @@ gint folder_item_scan(FolderItem *item)
                if (folder_cur_num < cache_cur_num) {
                        gboolean add = FALSE;
 
-                       switch(folder->type) {
+                       switch(FOLDER_TYPE(folder)) {
                                case F_NEWS:
                                        if (folder_cur_num < cache_max_num)
                                                break;
                                        
-                                       if (prefs_common.max_articles == 0) {
+                                       if (folder->account->max_articles == 0) {
                                                add = TRUE;
                                        }
 
-                                       if (folder_max_num <= prefs_common.max_articles) {
+                                       if (folder_max_num <= folder->account->max_articles) {
                                                add = TRUE;
-                                       } else if (folder_cur_num > (folder_max_num - prefs_common.max_articles)) {
+                                       } else if (folder_cur_num > (folder_max_num - folder->account->max_articles)) {
                                                add = TRUE;
                                        }
                                        break;
@@ -1099,8 +1235,6 @@ gint folder_item_scan(FolderItem *item)
                        else
                                folder_cur_num = G_MAXINT;
 
-                       contentchange = TRUE;
-
                        continue;
                }
 
@@ -1120,7 +1254,7 @@ gint folder_item_scan(FolderItem *item)
                        else
                                cache_cur_num = G_MAXINT;
 
-                       contentchange = TRUE;
+                       update_flags |= F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT;
 
                        continue;
                }
@@ -1133,33 +1267,14 @@ gint folder_item_scan(FolderItem *item)
                        MsgInfo *msginfo;
 
                        msginfo = msgcache_get_msg(item->cache, folder_cur_num);
-                       if (folder->is_msg_changed && folder->is_msg_changed(folder, item, msginfo)) {
-                               MsgInfo *newmsginfo;
-
+                       if (folder->klass->is_msg_changed && folder->klass->is_msg_changed(folder, item, msginfo)) {
                                msgcache_remove_msg(item->cache, msginfo->msgnum);
+                               new_list = g_slist_prepend(new_list, GINT_TO_POINTER(msginfo->msgnum));
+                               procmsg_msginfo_free(msginfo);
 
-                               if (NULL != (newmsginfo = folder->get_msginfo(folder, item, folder_cur_num))) {
-                                       msgcache_add_msg(item->cache, newmsginfo);
-                                       if (MSG_IS_NEW(newmsginfo->flags) && !MSG_IS_IGNORE_THREAD(newmsginfo->flags))
-                                               newcnt++;
-                                       if (MSG_IS_UNREAD(newmsginfo->flags) && !MSG_IS_IGNORE_THREAD(newmsginfo->flags))
-                                               unreadcnt++;
-                                       if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
-                                               unreadmarkedcnt++;
-                                       procmsg_msginfo_free(newmsginfo);
-                               }                                       
-
-                               debug_print("Updated msginfo for message %d.\n", folder_cur_num);
-                       } else {
-                               if (MSG_IS_NEW(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                       newcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                       unreadcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                                       unreadmarkedcnt++;
-                       }
-                       totalcnt++;
-                       procmsg_msginfo_free(msginfo);
+                               debug_print("Remembering message %d to update...\n", folder_cur_num);
+                       } else
+                               exists_list = g_slist_prepend(exists_list, msginfo);
 
                        /* Move to next folder and cache number */
                        cache_list_cur = cache_list_cur->next;
@@ -1175,75 +1290,120 @@ gint folder_item_scan(FolderItem *item)
                        else
                                folder_cur_num = G_MAXINT;
 
-                       contentchange = TRUE;
-
                        continue;
                }
        }
-
-       for(cache_list_cur = cache_list; cache_list_cur != NULL; cache_list_cur = g_slist_next(cache_list_cur)) {
+       
+       for(cache_list_cur = cache_list; cache_list_cur != NULL; cache_list_cur = g_slist_next(cache_list_cur))
                procmsg_msginfo_free((MsgInfo *) cache_list_cur->data);
-       }
 
        g_slist_free(cache_list);
        g_slist_free(folder_list);
 
-       if (folder->get_msginfos) {
-               GSList *elem;
-               GSList *newmsg_list;
-               MsgInfo *msginfo;
-               
-               if (new_list) {
-                       newmsg_list = folder->get_msginfos(folder, item, new_list);
-                       for (elem = newmsg_list; elem != NULL; elem = g_slist_next(elem)) {
-                               msginfo = (MsgInfo *) elem->data;
-                               msgcache_add_msg(item->cache, msginfo);
-                               if (MSG_IS_NEW(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                       newcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                       unreadcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                                       unreadmarkedcnt++;
-                               totalcnt++;
-                               procmsg_msginfo_free(msginfo);
+       if (new_list != NULL) {
+               if (folder->klass->get_msginfos) {
+                       newmsg_list = folder->klass->get_msginfos(folder, item, new_list);
+               } else if (folder->klass->get_msginfo) {
+                       GSList *elem;
+       
+                       for (elem = new_list; elem != NULL; elem = g_slist_next(elem)) {
+                               MsgInfo *msginfo;
+                               guint num;
+
+                               num = GPOINTER_TO_INT(elem->data);
+                               msginfo = folder->klass->get_msginfo(folder, item, num);
+                               if (msginfo != NULL) {
+                                       newmsg_list = g_slist_prepend(newmsg_list, msginfo);
+                                       debug_print("Added newly found message %d to cache.\n", num);
+                               }
                        }
-                       g_slist_free(newmsg_list);
                }
-       } else if (folder->get_msginfo) {
+               g_slist_free(new_list);
+       }
+
+       folder_item_update_freeze();
+       if (newmsg_list != NULL) {
                GSList *elem;
-       
-               for (elem = new_list; elem != NULL; elem = g_slist_next(elem)) {
-                       MsgInfo *msginfo;
-                       guint num;
-
-                       num = GPOINTER_TO_INT(elem->data);
-                       msginfo = folder->get_msginfo(folder, item, num);
-                       if (msginfo != NULL) {
-                               msgcache_add_msg(item->cache, msginfo);
-                               if (MSG_IS_NEW(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                   newcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
-                                   unreadcnt++;
-                               if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                                       unreadmarkedcnt++;
-                               totalcnt++;
+
+               for (elem = newmsg_list; elem != NULL; elem = g_slist_next(elem)) {
+                       MsgInfo *msginfo = (MsgInfo *) elem->data;
+
+                       msgcache_add_msg(item->cache, msginfo);
+                       if ((filtering == TRUE) &&
+                           (item->stype == F_INBOX) &&
+                           (item->folder->account != NULL) && 
+                           (item->folder->account->filter_on_recv) &&
+                           procmsg_msginfo_filter(msginfo))
                                procmsg_msginfo_free(msginfo);
-                               debug_print("Added newly found message %d to cache.\n", num);
-                       }
+                       else
+                               exists_list = g_slist_prepend(exists_list, msginfo);
+               }
+               g_slist_free(newmsg_list);
+
+               update_flags |= F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT;
+       }
+
+       for (elem = exists_list; elem != NULL; elem = g_slist_next(elem)) {
+               MsgInfo *msginfo;
+
+               msginfo = elem->data;
+               if (MSG_IS_IGNORE_THREAD(msginfo->flags) && (MSG_IS_NEW(msginfo->flags) || MSG_IS_UNREAD(msginfo->flags)))
+                       procmsg_msginfo_unset_flags(msginfo, MSG_NEW | MSG_UNREAD, 0);
+               if (!MSG_IS_IGNORE_THREAD(msginfo->flags) && procmsg_msg_has_flagged_parent(msginfo, MSG_IGNORE_THREAD)) {
+                       procmsg_msginfo_unset_flags(msginfo, MSG_NEW | MSG_UNREAD, 0);
+                       procmsg_msginfo_set_flags(msginfo, MSG_IGNORE_THREAD, 0);
                }
+               if ((item->stype == F_OUTBOX ||
+                    item->stype == F_QUEUE  ||
+                    item->stype == F_DRAFT  ||
+                    item->stype == F_TRASH) &&
+                   (MSG_IS_NEW(msginfo->flags) || MSG_IS_UNREAD(msginfo->flags)))
+                       procmsg_msginfo_unset_flags(msginfo, MSG_NEW | MSG_UNREAD, 0);
+               if (MSG_IS_NEW(msginfo->flags))
+                       newcnt++;
+               if (MSG_IS_UNREAD(msginfo->flags))
+                       unreadcnt++;
+               if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
+                       unreadmarkedcnt++;
+               totalcnt++;
+
+               procmsg_msginfo_free(msginfo);
        }
+       g_slist_free(exists_list);
 
-       item->new = newcnt;
-       item->unread = unreadcnt;
-       item->total = totalcnt;
-       item->unreadmarked = unreadmarkedcnt;
-       g_slist_free(new_list);
+       item->new_msgs = newcnt;
+       item->unread_msgs = unreadcnt;
+       item->total_msgs = totalcnt;
+       item->unreadmarked_msgs = unreadmarkedcnt;
 
-       folder_update_item(item, contentchange);
+       update_flags |= F_ITEM_UPDATE_MSGCNT;
+
+       folder_item_update(item, update_flags);
+       folder_item_update_thaw();
 
        return 0;
 }
 
+gint folder_item_scan(FolderItem *item)
+{
+       return folder_item_scan_full(item, TRUE);
+}
+
+static gboolean folder_scan_all_items_func(GNode *node, gpointer data)
+{
+       FolderItem *item = node->data;
+
+       folder_item_scan(item);
+
+       return FALSE;
+}
+
+void folder_scan_all_items(Folder * folder)
+{
+       g_node_traverse(folder->node, G_PRE_ORDER,
+                       G_TRAVERSE_ALL, -1, folder_scan_all_items_func, NULL);
+}
+
 static void folder_item_scan_foreach_func(gpointer key, gpointer val,
                                          gpointer data)
 {
@@ -1307,7 +1467,7 @@ void folder_item_free_cache(FolderItem *item)
        item->cache = NULL;
 }
 
-void folder_clean_cache_memory()
+void folder_clean_cache_memory(void)
 {
        gint memusage = 0;
 
@@ -1344,7 +1504,7 @@ void folder_item_read_cache(FolderItem *item)
        item->cache = msgcache_read_cache(item, cache_file);
        if (!item->cache) {
                item->cache = msgcache_new();
-               folder_item_scan(item);
+               folder_item_scan_full(item, TRUE);
        }
        msgcache_read_mark(item->cache, mark_file);
        g_free(cache_file);
@@ -1356,7 +1516,7 @@ void folder_item_read_cache(FolderItem *item)
 void folder_item_write_cache(FolderItem *item)
 {
        gchar *cache_file, *mark_file;
-       PrefsFolderItem *prefs;
+       FolderItemPrefs *prefs;
        gint filemode = 0;
        gchar *id;
        
@@ -1398,8 +1558,8 @@ MsgInfo *folder_item_get_msginfo(FolderItem *item, gint num)
        if ((msginfo = msgcache_get_msg(item->cache, num)) != NULL)
                return msginfo;
        
-       g_return_val_if_fail(folder->get_msginfo, NULL);
-       if ((msginfo = folder->get_msginfo(folder, item, num)) != NULL) {
+       g_return_val_if_fail(folder->klass->get_msginfo, NULL);
+       if ((msginfo = folder->klass->get_msginfo(folder, item, num)) != NULL) {
                msgcache_add_msg(item->cache, msginfo);
                return msginfo;
        }
@@ -1413,6 +1573,7 @@ MsgInfo *folder_item_get_msginfo_by_msgid(FolderItem *item, const gchar *msgid)
        MsgInfo *msginfo;
        
        g_return_val_if_fail(item != NULL, NULL);
+       g_return_val_if_fail(msgid != NULL, NULL);
        
        folder = item->folder;
        if (!item->cache)
@@ -1444,52 +1605,226 @@ gchar *folder_item_fetch_msg(FolderItem *item, gint num)
 
        folder = item->folder;
 
-       g_return_val_if_fail(folder->fetch_msg != NULL, NULL);
+       g_return_val_if_fail(folder->klass->fetch_msg != NULL, NULL);
 
-       return folder->fetch_msg(folder, item, num);
+       return folder->klass->fetch_msg(folder, item, num);
 }
 
-gint folder_item_add_msg(FolderItem *dest, const gchar *file,
-                        gboolean remove_source)
+static gint folder_item_get_msg_num_by_file(FolderItem *dest, const gchar *file)
 {
-       Folder *folder;
-       gint num;
+       static HeaderEntry hentry[] = {{"Message-ID:",  NULL, TRUE},
+                                      {NULL,           NULL, FALSE}};
+       FILE *fp;
        MsgInfo *msginfo;
+       gint msgnum = 0;
+       gchar buf[BUFFSIZE];
 
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(file != NULL, -1);
+       if ((fp = fopen(file, "rb")) == NULL)
+               return 0;
 
-       folder = dest->folder;
+       if ((dest->stype == F_QUEUE) || (dest->stype == F_DRAFT))
+               while (fgets(buf, sizeof(buf), fp) != NULL)
+                       if (buf[0] == '\r' || buf[0] == '\n') break;
 
-       g_return_val_if_fail(folder->add_msg != NULL, -1);
+       procheader_get_header_fields(fp, hentry);
+       if (hentry[0].body) {
+               extract_parenthesis(hentry[0].body, '<', '>');
+               remove_space(hentry[0].body);
+               if ((msginfo = msgcache_get_msg_by_id(dest->cache, hentry[0].body)) != NULL) {
+                       msgnum = msginfo->msgnum;
+                       procmsg_msginfo_free(msginfo);
 
-       if (!dest->cache)
-               folder_item_read_cache(dest);
+                       debug_print("found message as uid %d\n", msgnum);
+               }
+       }
+       
+       g_free(hentry[0].body);
+       hentry[0].body = NULL;
+       fclose(fp);
 
-       num = folder->add_msg(folder, dest, file, remove_source);
+       return msgnum;
+}
 
-        if (num > 0) {
-               msginfo = folder->get_msginfo(folder, dest, num);
+static void copy_msginfo_flags(MsgInfo *source, MsgInfo *dest)
+{
+       MsgPermFlags perm_flags = 0;
+       MsgTmpFlags tmp_flags = 0;
 
-               if (msginfo != NULL) {
-                       if (MSG_IS_NEW(msginfo->flags))
-                               dest->new++;
-                       if (MSG_IS_UNREAD(msginfo->flags))
-                               dest->unread++;
-                       if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                               dest->unreadmarked++;
-                       dest->total++;
-                       dest->need_update = TRUE;
+       /* create new flags */
+       if (source != NULL) {
+               /* copy original flags */
+               perm_flags = source->flags.perm_flags;
+               tmp_flags = source->flags.tmp_flags;
+       } else {
+               perm_flags = dest->flags.perm_flags;
+               tmp_flags = dest->flags.tmp_flags;
+       }
 
-                       msgcache_add_msg(dest->cache, msginfo);
+       /* remove new, unread and deleted in special folders */
+       if (dest->folder->stype == F_OUTBOX ||
+           dest->folder->stype == F_QUEUE  ||
+           dest->folder->stype == F_DRAFT  ||
+           dest->folder->stype == F_TRASH)
+               perm_flags &= ~(MSG_NEW | MSG_UNREAD | MSG_DELETED);
 
-                       procmsg_msginfo_free(msginfo);
-               }
+       /* set ignore flag of ignored parent exists */
+       if (procmsg_msg_has_flagged_parent(dest, MSG_IGNORE_THREAD))
+               perm_flags |= MSG_IGNORE_THREAD;
 
-                dest->last_num = num;
-        }
+       /* Unset tmp flags that should not be copied */
+       tmp_flags &= ~(MSG_MOVE | MSG_COPY);
 
-       return num;
+       /* unset flags that are set but should not */
+       procmsg_msginfo_unset_flags(dest,
+                                   dest->flags.perm_flags & ~perm_flags,
+                                   dest->flags.tmp_flags  & ~tmp_flags);
+       /* set new flags */
+       procmsg_msginfo_set_flags(dest,
+                                 ~dest->flags.perm_flags & perm_flags,
+                                 ~dest->flags.tmp_flags  & tmp_flags);
+
+       folder_item_update(dest->folder, F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT);
+}
+
+static void add_msginfo_to_cache(FolderItem *item, MsgInfo *newmsginfo, MsgInfo *flagsource)
+{
+       /* update folder stats */
+       if (MSG_IS_NEW(newmsginfo->flags))
+               item->new_msgs++;
+       if (MSG_IS_UNREAD(newmsginfo->flags))
+               item->unread_msgs++;
+       if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
+               item->unreadmarked_msgs++;
+       item->total_msgs++;
+
+       copy_msginfo_flags(flagsource, newmsginfo);
+
+       msgcache_add_msg(item->cache, newmsginfo);
+}
+
+static void remove_msginfo_from_cache(FolderItem *item, MsgInfo *msginfo)
+{
+       MsgInfoUpdate msginfo_update;
+
+       if (!item->cache)
+               folder_item_read_cache(item);
+
+       if (MSG_IS_NEW(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
+               msginfo->folder->new_msgs--;
+       if (MSG_IS_UNREAD(msginfo->flags) && !MSG_IS_IGNORE_THREAD(msginfo->flags))
+               msginfo->folder->unread_msgs--;
+       if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
+               msginfo->folder->unreadmarked_msgs--;
+       msginfo->folder->total_msgs--;
+
+       msginfo_update.msginfo = msginfo;
+       msginfo_update.flags = MSGINFO_UPDATE_DELETED;
+       hooks_invoke(MSGINFO_UPDATE_HOOKLIST, &msginfo_update);
+
+       msgcache_remove_msg(item->cache, msginfo->msgnum);
+       folder_item_update(msginfo->folder, F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT);
+}
+
+gint folder_item_add_msg(FolderItem *dest, const gchar *file,
+                        MsgFlags *flags, gboolean remove_source)
+{
+        GSList file_list;
+        MsgFileInfo fileinfo;
+
+       g_return_val_if_fail(dest != NULL, -1);
+       g_return_val_if_fail(file != NULL, -1);
+       fileinfo.msginfo = NULL;
+        fileinfo.file = (gchar *)file;
+        fileinfo.flags = flags;
+        file_list.data = &fileinfo;
+        file_list.next = NULL;
+
+       return folder_item_add_msgs(dest, &file_list, remove_source);
+}
+
+gint folder_item_add_msgs(FolderItem *dest, GSList *file_list,
+                          gboolean remove_source)
+{
+        Folder *folder;
+        gint ret, num, lastnum = -1;
+       GSList *file_cur;
+       GRelation *relation;
+       MsgFileInfo *fileinfo = NULL;
+       gboolean folderscan = FALSE;
+
+        g_return_val_if_fail(dest != NULL, -1);
+        g_return_val_if_fail(file_list != NULL, -1);
+        g_return_val_if_fail(dest->folder != NULL, -1);
+
+        folder = dest->folder;
+
+       relation = g_relation_new(2);
+       g_relation_index(relation, 0, g_direct_hash, g_direct_equal);
+
+       if (folder->klass->add_msgs != NULL) {
+               ret = folder->klass->add_msgs(folder, dest, file_list, relation);
+               if (ret < 0) {
+                       g_relation_destroy(relation);
+                       return ret;
+               }
+       } else {
+               for (file_cur = file_list; file_cur != NULL; file_cur = g_slist_next(file_cur)) {
+                       fileinfo = (MsgFileInfo *) file_cur->data;
+
+                       ret = folder->klass->add_msg(folder, dest, fileinfo->file, fileinfo->flags);
+                       if (ret < 0) {
+                               g_relation_destroy(relation);
+                               return ret;
+                       }
+                       g_relation_insert(relation, fileinfo, GINT_TO_POINTER(ret));
+               }
+       }
+
+       for (file_cur = file_list; file_cur != NULL; file_cur = g_slist_next(file_cur)) {
+               GTuples *tuples;
+
+               fileinfo = (MsgFileInfo *) file_cur->data;
+               tuples = g_relation_select(relation, fileinfo, 0);
+               num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
+               g_tuples_destroy(tuples);
+
+               if (num >= 0) {
+                       MsgInfo *newmsginfo;
+
+                       if (num == 0) {
+                               if (!folderscan) {
+                                       folder_item_scan_full(dest, FALSE);
+                                       folderscan = TRUE;
+                               }
+                               num = folder_item_get_msg_num_by_file(dest, fileinfo->file);
+                       }
+
+                       if (num > lastnum)
+                               lastnum = num;
+
+                       if (num >= 0 && remove_source) {
+                               if (unlink(fileinfo->file) < 0)
+                                       FILE_OP_ERROR(fileinfo->file, "unlink");
+                       }
+
+                       if (num == 0)
+                               continue;
+
+                       if (!folderscan && 
+                           ((newmsginfo = folder->klass->get_msginfo(folder, dest, num)) != NULL)) {
+                               add_msginfo_to_cache(dest, newmsginfo, NULL);
+                               procmsg_msginfo_free(newmsginfo);
+                       } else if ((newmsginfo = msgcache_get_msg(dest->cache, num)) != NULL) {
+                               /* TODO: set default flags */
+                               procmsg_msginfo_free(newmsginfo);
+                       }
+               }
+       }
+
+       g_relation_destroy(relation);
+
+        return lastnum;
 }
 
 /*
@@ -1511,14 +1846,12 @@ gint folder_item_move_msg(FolderItem *dest, MsgInfo *msginfo)
 }
 */
                
-FolderItem *folder_item_move_recursive (FolderItem *src, FolderItem *dest) 
+FolderItem *folder_item_move_recursive(FolderItem *src, FolderItem *dest) 
 {
        GSList *mlist;
-       GSList *cur;
        FolderItem *new_item;
        FolderItem *next_item;
        GNode *srcnode;
-       int cnt = 0;
        gchar *old_id, *new_id;
 
        mlist = folder_item_get_msg_list(src);
@@ -1535,22 +1868,14 @@ FolderItem *folder_item_move_recursive (FolderItem *src, FolderItem *dest)
                new_item->folder = dest->folder;
 
        /* move messages */
-       for (cur = mlist ; cur != NULL ; cur = cur->next) {
-               MsgInfo * msginfo;
-               cnt++;
-               if (cnt%500)
-                       log_message(_("Moving %s to %s (%d%%)...\n"), src->name, 
-                                       new_item->path,
-                                       100*cnt/g_slist_length(mlist));
-               msginfo = (MsgInfo *) cur->data;
-               folder_item_move_msg(new_item, msginfo);
-
-               procmsg_msginfo_free(msginfo);
-       }
+       log_message(_("Moving %s to %s...\n"), 
+                       src->name, new_item->path);
+       folder_item_move_msgs(new_item, mlist);
        
        /*copy prefs*/
-       prefs_folder_item_copy_prefs(src, new_item);
+       folder_item_prefs_copy_prefs(src, new_item);
        new_item->collapsed = src->collapsed;
+       new_item->thread_collapsed = src->thread_collapsed;
        new_item->threaded  = src->threaded;
        new_item->ret_rcpt  = src->ret_rcpt;
        new_item->hide_read_msgs = src->hide_read_msgs;
@@ -1575,7 +1900,7 @@ FolderItem *folder_item_move_recursive (FolderItem *src, FolderItem *dest)
        new_id = folder_item_get_identifier(new_item);
        debug_print("updating rules : %s => %s\n", old_id, new_id);
        
-       src->folder->remove_folder(src->folder, src);
+       src->folder->klass->remove_folder(src->folder, src);
        folder_write_list();
 
        if (old_id != NULL && new_id != NULL)
@@ -1591,7 +1916,6 @@ gint folder_item_move_to(FolderItem *src, FolderItem *dest, FolderItem **new_ite
        FolderItem *tmp = dest->parent;
        gchar * src_identifier, * dst_identifier;
        gchar * phys_srcpath, * phys_dstpath;
-       GNode *src_node;
        
        while (tmp) {
                if (tmp == src) {
@@ -1610,7 +1934,7 @@ gint folder_item_move_to(FolderItem *src, FolderItem *dest, FolderItem **new_ite
                dst_identifier = folder_get_identifier(dest->folder);
        }
        if (src_identifier == NULL || dst_identifier == NULL) {
-               printf("Can't get identifiers\n");
+               debug_print("Can't get identifiers\n");
                return F_MOVE_FAILED;
        }
 
@@ -1633,14 +1957,6 @@ gint folder_item_move_to(FolderItem *src, FolderItem *dest, FolderItem **new_ite
                return F_MOVE_FAILED;
        }
        
-       /* update rules */
-       src_node = g_node_find(src->folder->node, G_PRE_ORDER, G_TRAVERSE_ALL, src);
-       if (src_node) 
-               g_node_destroy(src_node);
-       else
-               debug_print("can't remove node: it's null!\n");
-       /* not to much worry if remove fails, move has been done */
-       
        g_free(src_identifier);
        g_free(dst_identifier);
        g_free(phys_srcpath);
@@ -1651,365 +1967,187 @@ gint folder_item_move_to(FolderItem *src, FolderItem *dest, FolderItem **new_ite
        return F_MOVE_OK;
 }
 
-gint folder_item_move_msg(FolderItem *dest, MsgInfo *msginfo)
-{
-       Folder *folder;
-       gint num;
-       Folder *src_folder;
-
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msginfo != NULL, -1);
-
-       folder = dest->folder;
-
-       g_return_val_if_fail(folder->remove_msg != NULL, -1);
-       g_return_val_if_fail(folder->copy_msg != NULL, -1);
-
-       if (!dest->cache) folder_item_read_cache(dest);
-
-       src_folder = msginfo->folder->folder;
-
-       num = folder->copy_msg(folder, dest, msginfo);
-       
-       if (num != -1) {
-               MsgInfo *newmsginfo;
-    
-               /* Add new msginfo to dest folder */
-               if (NULL != (newmsginfo = folder->get_msginfo(folder, dest, num))) {
-                       newmsginfo->flags.perm_flags = msginfo->flags.perm_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);
-                       msgcache_add_msg(dest->cache, newmsginfo);
-
-                       if (MSG_IS_NEW(newmsginfo->flags))
-                               dest->new++;
-                       if (MSG_IS_UNREAD(newmsginfo->flags))
-                               dest->unread++;
-                       if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
-                               dest->unreadmarked++;
-                       dest->total++;
-                       dest->need_update = TRUE;
-
-                       procmsg_msginfo_free(newmsginfo);
-               }
-
-               /* remove source message from it's folder */
-               if (src_folder->remove_msg) {
-                       src_folder->remove_msg(src_folder, msginfo->folder,
-                                              msginfo->msgnum);
-                       msgcache_remove_msg(msginfo->folder->cache, msginfo->msgnum);
-
-                       if (MSG_IS_NEW(msginfo->flags))
-                               msginfo->folder->new--;
-                       if (MSG_IS_UNREAD(msginfo->flags))
-                               msginfo->folder->unread--;
-                       if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                               msginfo->folder->unreadmarked--;
-                       msginfo->folder->total--;
-                       msginfo->folder->need_update = TRUE;
-               }
-       }
-       
-       if (folder->finished_copy)
-               folder->finished_copy(folder, dest);
-
-       return num;
-}
-
-/*
-gint folder_item_move_msgs_with_dest(FolderItem *dest, GSList *msglist)
+/**
+ * Copy a list of message to a new folder and remove
+ * source messages if wanted
+ */
+static gint do_copy_msgs(FolderItem *dest, GSList *msglist, gboolean remove_source)
 {
        Folder *folder;
-       gint num;
+       GSList *l;
+       gint num, lastnum = -1;
+       gboolean folderscan = FALSE;
+       GRelation *relation;
 
        g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(msglist != NULL, -1);
 
        folder = dest->folder;
-       if (dest->last_num < 0) folder->scan(folder, dest);
-
-       num = folder->move_msgs_with_dest(folder, dest, msglist);
-       if (num > 0) dest->last_num = num;
-       else dest->op_count = 0;
-
-       return num;
-}
-*/
 
-gint folder_item_move_msgs_with_dest(FolderItem *dest, GSList *msglist)
-{
-       Folder *folder;
-       FolderItem *item;
-       GSList *newmsgnums = NULL;
-       GSList *l, *l2;
-       gint num;
+       g_return_val_if_fail(folder->klass->copy_msg != NULL, -1);
 
-       g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msglist != NULL, -1);
-
-       folder = dest->folder;
-
-       g_return_val_if_fail(folder->copy_msg != NULL, -1);
-       g_return_val_if_fail(folder->remove_msg != NULL, -1);
+       relation = g_relation_new(2);
+       g_relation_index(relation, 0, g_direct_hash, g_direct_equal);
+       g_relation_index(relation, 1, g_direct_hash, g_direct_equal);
 
        /* 
         * Copy messages to destination folder and 
         * store new message numbers in newmsgnums
         */
-       item = NULL;
-       for (l = msglist ; l != NULL ; l = g_slist_next(l)) {
-               MsgInfo * msginfo = (MsgInfo *) l->data;
-
-               if (!item && msginfo->folder != NULL)
-                       item = msginfo->folder;
+       if (folder->klass->copy_msgs != NULL) {
+               if (folder->klass->copy_msgs(folder, dest, msglist, relation) < 0) {
+                       g_relation_destroy(relation);
+                       return -1;
+               }
+       } else {
+               for (l = msglist ; l != NULL ; l = g_slist_next(l)) {
+                       MsgInfo * msginfo = (MsgInfo *) l->data;
 
-               num = folder->copy_msg(folder, dest, msginfo);
-               newmsgnums = g_slist_append(newmsgnums, GINT_TO_POINTER(num));
+                       num = folder->klass->copy_msg(folder, dest, msginfo);
+                       g_relation_insert(relation, msginfo, GINT_TO_POINTER(num));
+               }
        }
 
        /* Read cache for dest folder */
        if (!dest->cache) folder_item_read_cache(dest);
-       
+
        /* 
         * Fetch new MsgInfos for new messages in dest folder,
         * add them to the msgcache and update folder message counts
         */
-       l2 = newmsgnums;
+       if (g_relation_count(relation, GINT_TO_POINTER(0), 1) > 0) {
+               folder_item_scan_full(dest, FALSE);
+               folderscan = TRUE;
+       }
+
        for (l = msglist; l != NULL; l = g_slist_next(l)) {
                MsgInfo *msginfo = (MsgInfo *) l->data;
+                GTuples *tuples;
 
-               num = GPOINTER_TO_INT(l2->data);
+                tuples = g_relation_select(relation, msginfo, 0);
+                num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
+                g_tuples_destroy(tuples);
 
-               if (num != -1) {
+               if (num >= 0) {
                        MsgInfo *newmsginfo;
 
-                       newmsginfo = folder->get_msginfo(folder, dest, num);
-                       if (newmsginfo) {
-                               newmsginfo->flags.perm_flags = msginfo->flags.perm_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);
-                               msgcache_add_msg(dest->cache, newmsginfo);
-
-                               if (MSG_IS_NEW(newmsginfo->flags))
-                                       dest->new++;
-                               if (MSG_IS_UNREAD(newmsginfo->flags))
-                                       dest->unread++;
-                               if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
-                                       dest->unreadmarked++;
-                               dest->total++;
-                               dest->need_update = TRUE;
-
-                               procmsg_msginfo_free(newmsginfo);
+                       if (folderscan) {
+                               if (msginfo->msgid != NULL) {
+                                       newmsginfo = folder_item_get_msginfo_by_msgid(dest, msginfo->msgid);
+                                       if (newmsginfo != NULL) {
+                                               copy_msginfo_flags(msginfo, newmsginfo);
+                                               num = newmsginfo->msgnum;
+                                               procmsg_msginfo_free(newmsginfo);
+                                       }
+                               }
+                       } else {
+                               newmsginfo = folder->klass->get_msginfo(folder, dest, num);
+                               if (newmsginfo != NULL) {
+                                       add_msginfo_to_cache(dest, newmsginfo, msginfo);
+                                       procmsg_msginfo_free(newmsginfo);
+                               }
                        }
+
+                       if (num > lastnum)
+                               lastnum = num;
                }
-               l2 = g_slist_next(l2);
        }
 
-       /*
-        * Remove source messages from their folders if
-        * copying was successfull and update folder
-        * message counts
-        */
-       l2 = newmsgnums;
-       for (l = msglist; l != NULL; l = g_slist_next(l)) {
-               MsgInfo *msginfo = (MsgInfo *) l->data;
-
-               num = GPOINTER_TO_INT(l2->data);
-               
-               if (num != -1) {
-                       item->folder->remove_msg(item->folder,
-                                                msginfo->folder,
-                                                msginfo->msgnum);
-                       if (!item->cache)
-                               folder_item_read_cache(item);
-                       msgcache_remove_msg(item->cache, msginfo->msgnum);
-
-                       if (MSG_IS_NEW(msginfo->flags))
-                               msginfo->folder->new--;
-                       if (MSG_IS_UNREAD(msginfo->flags))
-                               msginfo->folder->unread--;
-                       if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                               msginfo->folder->unreadmarked--;
-                       msginfo->folder->total--;                       
-                       msginfo->folder->need_update = TRUE;
+       if (remove_source) {
+               /*
+                * Remove source messages from their folders if
+                * copying was successfull and update folder
+                * message counts
+                */
+               for (l = msglist; l != NULL; l = g_slist_next(l)) {
+                       MsgInfo *msginfo = (MsgInfo *) l->data;
+                       FolderItem *item = msginfo->folder;
+                       GTuples *tuples;
+
+                       tuples = g_relation_select(relation, msginfo, 0);
+                       num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
+                       g_tuples_destroy(tuples);
+
+                       if ((num >= 0) && (item->folder->klass->remove_msg != NULL)) {
+                               item->folder->klass->remove_msg(item->folder,
+                                                               msginfo->folder,
+                                                               msginfo->msgnum);
+                               remove_msginfo_from_cache(item, msginfo);
+                       }
                }
-
-               l2 = g_slist_next(l2);
        }
 
+       if (folder->klass->finished_copy)
+               folder->klass->finished_copy(folder, dest);
 
-       if (folder->finished_copy)
-               folder->finished_copy(folder, dest);
-
-       g_slist_free(newmsgnums);
-       return dest->last_num;
+       g_relation_destroy(relation);
+       return lastnum;
 }
 
-/*
-gint folder_item_copy_msg(FolderItem *dest, MsgInfo *msginfo)
+/**
+ * Move a message to a new folder.
+ *
+ * \param dest Destination folder
+ * \param msginfo The message
+ */
+gint folder_item_move_msg(FolderItem *dest, MsgInfo *msginfo)
 {
-       Folder *folder;
-       gint num;
+       GSList list;
 
        g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(msginfo != NULL, -1);
 
-       folder = dest->folder;
-       if (dest->last_num < 0) folder->scan(folder, dest);
-
-       num = folder->copy_msg(folder, dest, msginfo);
-       if (num > 0) dest->last_num = num;
+       list.data = msginfo;
+       list.next = NULL;
 
-       return num;
+       return do_copy_msgs(dest, &list, TRUE);
 }
-*/
 
-gint folder_item_copy_msg(FolderItem *dest, MsgInfo *msginfo)
+/**
+ * Move a list of messages to a new folder.
+ *
+ * \param dest Destination folder
+ * \param msglist List of messages
+ */
+gint folder_item_move_msgs(FolderItem *dest, GSList *msglist)
 {
-       Folder *folder;
-       gint num;
-
        g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msginfo != NULL, -1);
-
-       folder = dest->folder;
-
-       g_return_val_if_fail(folder->copy_msg != NULL, -1);
-
-       if (!dest->cache) folder_item_read_cache(dest);
-       
-       num = folder->copy_msg(folder, dest, msginfo);
-       if (num != -1) {
-               MsgInfo *newmsginfo;
-
-               if (NULL != (newmsginfo = folder->get_msginfo(folder, dest, num))) {
-                       newmsginfo->flags.perm_flags = msginfo->flags.perm_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);
-                       msgcache_add_msg(dest->cache, newmsginfo);
-
-                       if (MSG_IS_NEW(newmsginfo->flags))
-                               dest->new++;
-                       if (MSG_IS_UNREAD(newmsginfo->flags))
-                               dest->unread++;
-                       if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
-                               dest->unreadmarked++;
-                       dest->total++;
-                       dest->need_update = TRUE;
-
-                       procmsg_msginfo_free(newmsginfo);
-               }                       
-       }
-
-       if (folder->finished_copy)
-               folder->finished_copy(folder, dest);
+       g_return_val_if_fail(msglist != NULL, -1);
 
-       return num;
+       return do_copy_msgs(dest, msglist, TRUE);
 }
 
-/*
-gint folder_item_copy_msgs_with_dest(FolderItem *dest, GSList *msglist)
+/**
+ * Copy a message to a new folder.
+ *
+ * \param dest Destination folder
+ * \param msginfo The message
+ */
+gint folder_item_copy_msg(FolderItem *dest, MsgInfo *msginfo)
 {
-       Folder *folder;
-       gint num;
+       GSList list;
 
        g_return_val_if_fail(dest != NULL, -1);
-       g_return_val_if_fail(msglist != NULL, -1);
-
-       folder = dest->folder;
-       if (dest->last_num < 0) folder->scan(folder, dest);
-
-       num = folder->copy_msgs_with_dest(folder, dest, msglist);
-       if (num > 0) dest->last_num = num;
-       else dest->op_count = 0;
-
-       return num;
+       g_return_val_if_fail(msginfo != NULL, -1);
+    
+       list.data = msginfo;
+       list.next = NULL;
+       
+       return do_copy_msgs(dest, &list, FALSE);
 }
-*/
 
-gint folder_item_copy_msgs_with_dest(FolderItem *dest, GSList *msglist)
+/**
+ * Copy a list of messages to a new folder.
+ *
+ * \param dest Destination folder
+ * \param msglist List of messages
+ */
+gint folder_item_copy_msgs(FolderItem *dest, GSList *msglist)
 {
-       Folder *folder;
-       gint num;
-       GSList *newmsgnums = NULL;
-       GSList *l, *l2;
-
        g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(msglist != NULL, -1);
 
-       folder = dest->folder;
-       g_return_val_if_fail(folder->copy_msg != NULL, -1);
-
-       /* 
-        * Copy messages to destination folder and 
-        * store new message numbers in newmsgnums
-        */
-       for (l = msglist ; l != NULL ; l = g_slist_next(l)) {
-               MsgInfo * msginfo = (MsgInfo *) l->data;
-
-               num = folder->copy_msg(folder, dest, msginfo);
-               newmsgnums = g_slist_append(newmsgnums, GINT_TO_POINTER(num));
-       }
-
-       /* Read cache for dest folder */
-       if (!dest->cache) folder_item_read_cache(dest);
-
-       /* 
-        * Fetch new MsgInfos for new messages in dest folder,
-        * add them to the msgcache and update folder message counts
-        */
-       l2 = newmsgnums;
-       for (l = msglist; l != NULL; l = g_slist_next(l)) {
-               MsgInfo *msginfo = (MsgInfo *) l->data;
-
-               num = GPOINTER_TO_INT(l2->data);
-
-               if (num != -1) {
-                       MsgInfo *newmsginfo;
-
-                       newmsginfo = folder->get_msginfo(folder, dest, num);
-                       if (newmsginfo) {
-                               newmsginfo->flags.perm_flags = msginfo->flags.perm_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);
-                               msgcache_add_msg(dest->cache, newmsginfo);
-
-                               if (MSG_IS_NEW(newmsginfo->flags))
-                                       dest->new++;
-                               if (MSG_IS_UNREAD(newmsginfo->flags))
-                                       dest->unread++;
-                               if (MSG_IS_UNREAD(newmsginfo->flags) && procmsg_msg_has_marked_parent(newmsginfo))
-                                       dest->unreadmarked++;
-                               dest->total++;
-                               dest->need_update = TRUE;
-
-                               procmsg_msginfo_free(newmsginfo);
-                       }
-               }
-               l2 = g_slist_next(l2);
-       }
-       
-       if (folder->finished_copy)
-               folder->finished_copy(folder, dest);
-
-       g_slist_free(newmsgnums);
-       return dest->last_num;
+       return do_copy_msgs(dest, msglist, FALSE);
 }
 
 gint folder_item_remove_msg(FolderItem *item, gint num)
@@ -2019,25 +2157,19 @@ gint folder_item_remove_msg(FolderItem *item, gint num)
        MsgInfo *msginfo;
 
        g_return_val_if_fail(item != NULL, -1);
-
        folder = item->folder;
+       g_return_val_if_fail(folder->klass->remove_msg != NULL, -1);
+
        if (!item->cache) folder_item_read_cache(item);
 
-       ret = folder->remove_msg(folder, item, num);
+       ret = folder->klass->remove_msg(folder, item, num);
 
        msginfo = msgcache_get_msg(item->cache, num);
        if (msginfo != NULL) {
-               if (MSG_IS_NEW(msginfo->flags))
-                       item->new--;
-               if (MSG_IS_UNREAD(msginfo->flags))
-                       item->unread--;
-               if (MSG_IS_UNREAD(msginfo->flags) && procmsg_msg_has_marked_parent(msginfo))
-                       item->unreadmarked--;
+               remove_msginfo_from_cache(item, msginfo);
                procmsg_msginfo_free(msginfo);
-               msgcache_remove_msg(item->cache, num);
        }
-       item->total--;
-       item->need_update = TRUE;
+       folder_item_update(item, F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT);
 
        return ret;
 }
@@ -2053,13 +2185,6 @@ gint folder_item_remove_msgs(FolderItem *item, GSList *msglist)
 
        if (!item->cache) folder_item_read_cache(item);
 
-       if (folder->remove_msgs) {
-               ret = folder->remove_msgs(folder, item, msglist);
-               if (ret == 0)
-                       folder_item_scan(item);
-               return ret;
-       }
-
        while (msglist != NULL) {
                MsgInfo *msginfo = (MsgInfo *)msglist->data;
 
@@ -2081,27 +2206,39 @@ gint folder_item_remove_all_msg(FolderItem *item)
 
        folder = item->folder;
 
-       g_return_val_if_fail(folder->remove_all_msg != NULL, -1);
+       g_return_val_if_fail(folder->klass->remove_all_msg != NULL, -1);
 
-       result = folder->remove_all_msg(folder, item);
+       result = folder->klass->remove_all_msg(folder, item);
 
        if (result == 0) {
-               if (folder->finished_remove)
-                       folder->finished_remove(folder, item);
+               if (folder->klass->finished_remove)
+                       folder->klass->finished_remove(folder, item);
 
                folder_item_free_cache(item);
                item->cache = msgcache_new();
 
-               item->new = 0;
-               item->unread = 0;
-               item->unreadmarked = 0;
-               item->total = 0;
-               item->need_update = TRUE;
+               item->new_msgs = 0;
+               item->unread_msgs = 0;
+               item->unreadmarked_msgs = 0;
+               item->total_msgs = 0;
+               folder_item_update(item, F_ITEM_UPDATE_MSGCNT | F_ITEM_UPDATE_CONTENT);
        }
 
        return result;
 }
 
+void folder_item_change_msg_flags(FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
+{
+       g_return_if_fail(item != NULL);
+       g_return_if_fail(msginfo != NULL);
+       
+       if (item->folder->klass->change_flags != NULL) {
+               item->folder->klass->change_flags(item->folder, item, msginfo, newflags);
+       } else {
+               msginfo->flags.perm_flags = newflags;
+       }
+}
+
 gboolean folder_item_is_msg_changed(FolderItem *item, MsgInfo *msginfo)
 {
        Folder *folder;
@@ -2110,9 +2247,9 @@ gboolean folder_item_is_msg_changed(FolderItem *item, MsgInfo *msginfo)
 
        folder = item->folder;
 
-       g_return_val_if_fail(folder->is_msg_changed != NULL, -1);
+       g_return_val_if_fail(folder->klass->is_msg_changed != NULL, -1);
 
-       return folder->is_msg_changed(folder, item, msginfo);
+       return folder->klass->is_msg_changed(folder, item, msginfo);
 }
 
 gchar *folder_item_get_cache_file(FolderItem *item)
@@ -2163,7 +2300,8 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
        PrefsAccount *account = NULL;
        gboolean no_sub = FALSE, no_select = FALSE, collapsed = FALSE, 
                 threaded = TRUE, apply_sub = FALSE;
-       gboolean ret_rcpt = FALSE, hidereadmsgs = FALSE; /* CLAWS */
+       gboolean ret_rcpt = FALSE, hidereadmsgs = FALSE,
+                thread_collapsed = FALSE; /* CLAWS */
        FolderSortKey sort_key = SORT_BY_NONE;
        FolderSortType sort_type = SORT_ASCENDING;
        gint new = 0, unread = 0, total = 0, unreadmarked = 0;
@@ -2216,6 +2354,8 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
                        no_select = *attr->value == '1' ? TRUE : FALSE;
                else if (!strcmp(attr->name, "collapsed"))
                        collapsed = *attr->value == '1' ? TRUE : FALSE;
+               else if (!strcmp(attr->name, "thread_collapsed"))
+                       thread_collapsed =  *attr->value == '1' ? TRUE : FALSE;
                else if (!strcmp(attr->name, "threaded"))
                        threaded =  *attr->value == '1' ? TRUE : FALSE;
                else if (!strcmp(attr->name, "hidereadmsgs"))
@@ -2242,9 +2382,11 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
                        else if (!strcmp(attr->value, "mark"))
                                sort_key = SORT_BY_MARK;
                        else if (!strcmp(attr->value, "unread"))
-                               sort_key = SORT_BY_UNREAD;
+                               sort_key = SORT_BY_STATUS;
                        else if (!strcmp(attr->value, "mime"))
                                sort_key = SORT_BY_MIME;
+                       else if (!strcmp(attr->value, "to"))
+                               sort_key = SORT_BY_TO;
                        else if (!strcmp(attr->value, "locked"))
                                sort_key = SORT_BY_LOCKED;
                } else if (!strcmp(attr->name, "sort_type")) {
@@ -2263,18 +2405,20 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
        item = folder_item_new(folder, name, path);
        item->stype = stype;
        item->mtime = mtime;
-       item->new = new;
-       item->unread = unread;
-       item->unreadmarked = unreadmarked;
-       item->total = total;
+       item->new_msgs = new;
+       item->unread_msgs = unread;
+       item->unreadmarked_msgs = unreadmarked;
+       item->total_msgs = total;
        item->no_sub = no_sub;
        item->no_select = no_select;
        item->collapsed = collapsed;
+       item->thread_collapsed = thread_collapsed;
        item->threaded  = threaded;
        item->hide_read_msgs  = hidereadmsgs;
        item->ret_rcpt  = ret_rcpt;
        item->sort_key  = sort_key;
        item->sort_type = sort_type;
+       item->node = node;
        item->parent = FOLDER_ITEM(node->parent->data);
        item->folder = folder;
        switch (stype) {
@@ -2287,7 +2431,7 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
        }
        item->account = account;
        item->apply_sub = apply_sub;
-       prefs_folder_item_read_config(item);
+       folder_item_prefs_read_config(item);
 
        node->data = item;
        xml_free_node(xmlnode);
@@ -2298,14 +2442,15 @@ static gboolean folder_build_tree(GNode *node, gpointer data)
 static gboolean folder_read_folder_func(GNode *node, gpointer data)
 {
        Folder *folder;
+       FolderItem *item;
        XMLNode *xmlnode;
        GList *list;
-       FolderType type = F_UNKNOWN;
+       FolderClass *class = NULL;
        const gchar *name = NULL;
        const gchar *path = NULL;
        PrefsAccount *account = NULL;
        gboolean collapsed = FALSE, threaded = TRUE, apply_sub = FALSE;
-       gboolean ret_rcpt = FALSE; /* CLAWS */
+       gboolean ret_rcpt = FALSE, thread_collapsed = FALSE; /* CLAWS */
 
        if (g_node_depth(node) != 2) return FALSE;
        g_return_val_if_fail(node->data != NULL, FALSE);
@@ -2321,23 +2466,16 @@ static gboolean folder_read_folder_func(GNode *node, gpointer data)
                XMLAttr *attr = list->data;
 
                if (!attr || !attr->name || !attr->value) continue;
-               if (!strcmp(attr->name, "type")) {
-                       if (!strcasecmp(attr->value, "mh"))
-                               type = F_MH;
-                       else if (!strcasecmp(attr->value, "mbox"))
-                               type = F_MBOX;
-                       else if (!strcasecmp(attr->value, "maildir"))
-                               type = F_MAILDIR;
-                       else if (!strcasecmp(attr->value, "imap"))
-                               type = F_IMAP;
-                       else if (!strcasecmp(attr->value, "news"))
-                               type = F_NEWS;
-               } else if (!strcmp(attr->name, "name"))
+               if (!strcmp(attr->name, "type"))
+                       class = folder_get_class_from_string(attr->value);
+               else if (!strcmp(attr->name, "name"))
                        name = attr->value;
                else if (!strcmp(attr->name, "path"))
                        path = attr->value;
                else if (!strcmp(attr->name, "collapsed"))
                        collapsed = *attr->value == '1' ? TRUE : FALSE;
+               else if (!strcmp(attr->name, "thread_collapsed"))
+                       thread_collapsed = *attr->value == '1' ? TRUE : FALSE;
                else if (!strcmp(attr->name, "threaded"))
                        threaded = *attr->value == '1' ? TRUE : FALSE;
                else if (!strcmp(attr->name, "account_id")) {
@@ -2350,20 +2488,23 @@ static gboolean folder_read_folder_func(GNode *node, gpointer data)
                        ret_rcpt = *attr->value == '1' ? TRUE : FALSE;
        }
 
-       folder = folder_new(type, name, path);
+       folder = folder_new(class, name, path);
        g_return_val_if_fail(folder != NULL, FALSE);
        folder->account = account;
-       if (account && (type == F_IMAP || type == F_NEWS))
+       if (account != NULL)
                account->folder = REMOTE_FOLDER(folder);
-       node->data = folder->node->data;
+       item = FOLDER_ITEM(folder->node->data);
+       node->data = item;
+       item->node = node;
        g_node_destroy(folder->node);
        folder->node = node;
        folder_add(folder);
-       FOLDER_ITEM(node->data)->collapsed = collapsed;
-       FOLDER_ITEM(node->data)->threaded  = threaded;
-       FOLDER_ITEM(node->data)->account   = account;
-       FOLDER_ITEM(node->data)->apply_sub = apply_sub;
-       FOLDER_ITEM(node->data)->ret_rcpt  = ret_rcpt;
+       item->collapsed = collapsed;
+       item->thread_collapsed = thread_collapsed;
+       item->threaded  = threaded;
+       item->account   = account;
+       item->apply_sub = apply_sub;
+       item->ret_rcpt  = ret_rcpt;
 
        g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
                        folder_build_tree, folder);
@@ -2394,13 +2535,12 @@ static void folder_write_list_recursive(GNode *node, gpointer data)
        FILE *fp = (FILE *)data;
        FolderItem *item;
        gint i, depth;
-       static gchar *folder_type_str[] = {"mh", "mbox", "maildir", "imap",
-                                          "news", "unknown"};
        static gchar *folder_item_stype_str[] = {"normal", "inbox", "outbox",
                                                 "draft", "queue", "trash"};
        static gchar *sort_key_str[] = {"none", "number", "size", "date",
                                        "from", "subject", "score", "label",
-                                       "mark", "unread", "mime", "locked" };
+                                       "mark", "unread", "mime", "to", 
+                                       "locked"};
        g_return_if_fail(node != NULL);
        g_return_if_fail(fp != NULL);
 
@@ -2413,10 +2553,10 @@ static void folder_write_list_recursive(GNode *node, gpointer data)
        if (depth == 1) {
                Folder *folder = item->folder;
 
-               fprintf(fp, "<folder type=\"%s\"", folder_type_str[folder->type]);
+               fprintf(fp, "<folder type=\"%s\"", folder->klass->idstr);
                if (folder->name)
                        PUT_ESCAPE_STR(fp, "name", folder->name);
-               if (folder->type == F_MH || folder->type == F_MBOX)
+               if (FOLDER_TYPE(folder) == F_MH || FOLDER_TYPE(folder) == F_MBOX || FOLDER_TYPE(folder) == F_MAILDIR)
                        PUT_ESCAPE_STR(fp, "path",
                                       LOCAL_FOLDER(folder)->rootpath);
                if (item->collapsed && node->children)
@@ -2442,6 +2582,12 @@ static void folder_write_list_recursive(GNode *node, gpointer data)
                        fputs(" no_select=\"1\"", fp);
                if (item->collapsed && node->children)
                        fputs(" collapsed=\"1\"", fp);
+               else
+                       fputs(" collapsed=\"0\"", fp);
+               if (item->thread_collapsed)
+                       fputs(" thread_collapsed=\"1\"", fp);
+               else
+                       fputs(" thread_collapsed=\"0\"", fp);
                if (item->threaded)
                        fputs(" threaded=\"1\"", fp);
                else
@@ -2464,7 +2610,7 @@ static void folder_write_list_recursive(GNode *node, gpointer data)
 
                fprintf(fp,
                        " mtime=\"%lu\" new=\"%d\" unread=\"%d\" unreadmarked=\"%d\" total=\"%d\"",
-                       item->mtime, item->new, item->unread, item->unreadmarked, item->total);
+                       item->mtime, item->new_msgs, item->unread_msgs, item->unreadmarked_msgs, item->total_msgs);
 
                if (item->account)
                        fprintf(fp, " account_id=\"%d\"",
@@ -2500,7 +2646,7 @@ static void folder_update_op_count_rec(GNode *node)
        if (g_node_depth(node) > 0) {
                if (fitem->op_count > 0) {
                        fitem->op_count = 0;
-                       folder_update_item(fitem, FALSE);
+                       folder_item_update(fitem, F_ITEM_UPDATE_MSGCNT);
                }
                if (node->children) {
                        GNode *child;
@@ -2517,7 +2663,8 @@ static void folder_update_op_count_rec(GNode *node)
        }
 }
 
-void folder_update_op_count() {
+void folder_update_op_count(void) 
+{
        GList *cur;
        Folder *folder;
 
@@ -2556,44 +2703,51 @@ static gchar * folder_item_get_tree_identifier(FolderItem * item)
 */
 
 /* CLAWS: temporary local folder for filtering */
-static Folder *processing_folder;
+#define TEMP_FOLDER "TEMP_FOLDER"
+#define PROCESSING_FOLDER_ITEM "processing"    
+
 static FolderItem *processing_folder_item;
 
 static void folder_create_processing_folder(void)
 {
-#define PROCESSING_FOLDER ".processing"        
-       Folder     *tmpparent;
+       Folder *processing_folder;
        gchar      *tmpname;
 
-       tmpparent = folder_get_default_folder();
-       g_assert(tmpparent);
-       debug_print("tmpparentroot %s\n", LOCAL_FOLDER(tmpparent)->rootpath);
-       if (LOCAL_FOLDER(tmpparent)->rootpath[0] == '/')
-               tmpname = g_strconcat(LOCAL_FOLDER(tmpparent)->rootpath,
-                                     G_DIR_SEPARATOR_S, PROCESSING_FOLDER,
+       if ((processing_folder = folder_find_from_name(TEMP_FOLDER, mh_get_class())) == NULL) {
+               gchar *tmppath;
+
+               tmppath =
+                   g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
+                               "tempfolder", NULL);
+               processing_folder =
+                   folder_new(mh_get_class(), TEMP_FOLDER, tmppath);
+               g_free(tmppath);
+       }
+       g_assert(processing_folder != NULL);
+
+       debug_print("tmpparentroot %s\n", LOCAL_FOLDER(processing_folder)->rootpath);
+       if (LOCAL_FOLDER(processing_folder)->rootpath[0] == '/')
+               tmpname = g_strconcat(LOCAL_FOLDER(processing_folder)->rootpath,
+                                     G_DIR_SEPARATOR_S, PROCESSING_FOLDER_ITEM,
                                      NULL);
        else
                tmpname = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
-                                     LOCAL_FOLDER(tmpparent)->rootpath,
-                                     G_DIR_SEPARATOR_S, PROCESSING_FOLDER,
+                                     LOCAL_FOLDER(processing_folder)->rootpath,
+                                     G_DIR_SEPARATOR_S, PROCESSING_FOLDER_ITEM,
                                      NULL);
 
-       processing_folder = folder_new(F_MH, "PROCESSING", LOCAL_FOLDER(tmpparent)->rootpath);
-       g_assert(processing_folder);
-
        if (!is_dir_exist(tmpname)) {
                debug_print("*TMP* creating %s\n", tmpname);
-               processing_folder_item = processing_folder->create_folder(processing_folder,
-                                                                         processing_folder->node->data,
-                                                                         PROCESSING_FOLDER);
-               g_assert(processing_folder_item);                                                                         
-       }
-       else {
+               processing_folder_item = processing_folder->klass->create_folder(processing_folder,
+                                                                                processing_folder->node->data,
+                                                                                PROCESSING_FOLDER_ITEM);
+       } else {
                debug_print("*TMP* already created\n");
-               processing_folder_item = folder_item_new(processing_folder, ".processing", ".processing");
+               processing_folder_item = folder_item_new(processing_folder, PROCESSING_FOLDER_ITEM, PROCESSING_FOLDER_ITEM);
                g_assert(processing_folder_item);
                folder_item_append(processing_folder->node->data, processing_folder_item);
        }
+       g_assert(processing_folder_item != NULL);
        g_free(tmpname);
 }
 
@@ -2607,7 +2761,7 @@ FolderItem *folder_get_default_processing(void)
 
 /* folder_persist_prefs_new() - return hash table with persistent
  * settings (and folder name as key). 
- * (note that in claws other options are in the PREFS_FOLDER_ITEM_RC
+ * (note that in claws other options are in the folder_item_prefs_RC
  * file, so those don't need to be included in PersistPref yet) 
  */
 GHashTable *folder_persist_prefs_new(Folder *folder)
@@ -2646,9 +2800,10 @@ void folder_item_restore_persist_prefs(FolderItem *item, GHashTable *pptable)
        /* CLAWS: since not all folder properties have been migrated to 
         * folderlist.xml, we need to call the old stuff first before
         * setting things that apply both to Main and Claws. */
-       prefs_folder_item_read_config(item); 
+       folder_item_prefs_read_config(item); 
         
        item->collapsed = pp->collapsed;
+       item->thread_collapsed = pp->thread_collapsed;
        item->threaded  = pp->threaded;
        item->ret_rcpt  = pp->ret_rcpt;
        item->hide_read_msgs = pp->hide_read_msgs;
@@ -2673,6 +2828,7 @@ static void folder_get_persist_prefs_recursive(GNode *node, GHashTable *pptable)
                pp = g_new0(PersistPrefs, 1);
                g_return_if_fail(pp != NULL);
                pp->collapsed = item->collapsed;
+               pp->thread_collapsed = item->thread_collapsed;
                pp->threaded  = item->threaded;
                pp->ret_rcpt  = item->ret_rcpt; 
                pp->hide_read_msgs = item->hide_read_msgs;
@@ -2711,8 +2867,9 @@ void folder_item_apply_processing(FolderItem *item)
        if (processing_list == NULL)
                return;
 
+       folder_item_update_freeze();
+
        mlist = folder_item_get_msg_list(item);
-       
        for (cur = mlist ; cur != NULL ; cur = cur->next) {
                MsgInfo * msginfo;
 
@@ -2720,63 +2877,81 @@ void folder_item_apply_processing(FolderItem *item)
                filter_message_by_msginfo(processing_list, msginfo);
                procmsg_msginfo_free(msginfo);
        }
-       
-       folder_update_items_when_required(FALSE);
-
        g_slist_free(mlist);
+
+       folder_item_update_thaw();
 }
 
 /*
- *  Callback handling for FolderItem content changes
+ *  functions for handling FolderItem content changes
  */
-void folder_update_item(FolderItem *item, gboolean contentchange)
-{
-       FolderItemUpdateData source;
-       
-       source.item = item;
-       source.content_change = contentchange;
-       hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);
-}
+static gint folder_item_update_freeze_cnt = 0;
 
-static void folder_update_item_func(FolderItem *item, gpointer contentchange)
+/**
+ * Notify the folder system about changes to a folder. If the
+ * update system is not frozen the FOLDER_ITEM_UPDATE_HOOKLIST will
+ * be invoked, otherwise the changes will be remebered until
+ * the folder system is thawed.
+ *
+ * \param item The FolderItem that was changed
+ * \param update_flags Type of changed that was made
+ */
+void folder_item_update(FolderItem *item, FolderItemUpdateFlags update_flags)
 {
-       FolderItemUpdateData source;
-
-       if (item->need_update) {
+       if (folder_item_update_freeze_cnt == 0) {
+               FolderItemUpdateData source;
+       
                source.item = item;
-               source.content_change = GPOINTER_TO_INT(contentchange);
-               hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);
-
-               item->need_update = FALSE;
+               source.update_flags = update_flags;
+               hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);
+       } else {
+               item->update_flags |= update_flags;
        }
 }
 
-void folder_update_items_when_required(gboolean contentchange)
-{
-       folder_func_to_all_folders(folder_update_item_func, GINT_TO_POINTER(contentchange));
-}
-
-void folder_update_item_recursive(FolderItem *item, gboolean update_summary)
+void folder_item_update_recursive(FolderItem *item, FolderItemUpdateFlags update_flags)
 {
        GNode *node = item->folder->node;       
-       FolderItemUpdateData source;
 
        node = g_node_find(node, G_PRE_ORDER, G_TRAVERSE_ALL, item);
        node = node->children;
 
-       source.item = item;
-       source.content_change = update_summary; 
-       hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);
+       folder_item_update(item, update_flags);
        while (node != NULL) {
                if (node && node->data) {
                        FolderItem *next_item = (FolderItem*) node->data;
 
-                       source.item = next_item;
-                       source.content_change = update_summary; 
-                       hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);
+                       folder_item_update(next_item, update_flags);
                }
                node = node->next;
        }
 }
 
+void folder_item_update_freeze(void)
+{
+       folder_item_update_freeze_cnt++;
+}
+
+static void folder_item_update_func(FolderItem *item, gpointer data)
+{
+       FolderItemUpdateData source;
+    
+       if (item->update_flags) {
+               source.item = item;
+               source.update_flags = item->update_flags;
+               hooks_invoke(FOLDER_ITEM_UPDATE_HOOKLIST, &source);                             
+               item->update_flags = 0;
+       }
+}
+
+void folder_item_update_thaw(void)
+{
+       if (folder_item_update_freeze_cnt > 0)
+               folder_item_update_freeze_cnt--;
+       if (folder_item_update_freeze_cnt == 0) {
+               /* Update all folders */
+               folder_func_to_all_folders(folder_item_update_func, NULL);
+       }
+}
+
 #undef PUT_ESCAPE_STR