path: root/mail/em-folder-tree.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.ximian.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#include <libxml/tree.h>

#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

#include <camel/camel-session.h>
#include <camel/camel-store.h>
#include <camel/camel-folder.h>
#include <camel/camel-vee-store.h>
#include <camel/camel-vtrash-folder.h>
#include <camel/camel-stream-mem.h>
#include <camel/camel-file-utils.h>
#include <camel/camel-stream-fs.h>

#include "e-util/e-mktemp.h"
#include "e-util/e-request.h"
#include "e-util/e-icon-factory.h"

#include "widgets/misc/e-error.h"

#include "filter/vfolder-rule.h"

#include "mail-mt.h"
#include "mail-ops.h"
#include "mail-tools.h"
#include "mail-config.h"
#include "mail-component.h"
#include "mail-vfolder.h"

#include "em-utils.h"
#include "em-popup.h"
#include "em-marshal.h"
#include "em-folder-tree.h"
#include "em-folder-selector.h"
#include "em-folder-selection.h"
#include "em-folder-properties.h"

#define d(x) x

struct _EMFolderTreePrivate {
    GtkTreeView *treeview;
    EMFolderTreeModel *model;
    
    char *selected_uri;
    char *selected_path;

    guint32 excluded;

    gboolean do_multiselect;
    /* when doing a multiselect, folders that we didn't find */
    GList *lost_folders;
    
    guint save_state_id;
    
    guint autoscroll_id;
    guint autoexpand_id;
    GtkTreeRowReference *autoexpand_row;
    
    guint loading_row_id;
    guint loaded_row_id;
    
    GtkTreeRowReference *drag_row;
};

enum {
    FOLDER_ACTIVATED,  /* aka double-clicked or user hit enter */
    FOLDER_SELECTED,
    LAST_SIGNAL
};

/* Drag & Drop types */
enum DndDragType {
    DND_DRAG_TYPE_FOLDER,          /* drag an evo folder */
    DND_DRAG_TYPE_TEXT_URI_LIST,   /* drag to an mbox file */
    NUM_DRAG_TYPES
};

enum DndDropType {
    DND_DROP_TYPE_UID_LIST,        /* drop a list of message uids */
    DND_DROP_TYPE_FOLDER,          /* drop an evo folder */
    DND_DROP_TYPE_MESSAGE_RFC822,  /* drop a message/rfc822 stream */
    DND_DROP_TYPE_TEXT_URI_LIST,   /* drop an mbox file */
    NUM_DROP_TYPES
};

static GtkTargetEntry drag_types[] = {
    { "x-folder",         0, DND_DRAG_TYPE_FOLDER         },
    { "text/uri-list",    0, DND_DRAG_TYPE_TEXT_URI_LIST  },
};

static GtkTargetEntry drop_types[] = {
    { "x-uid-list" ,      0, DND_DROP_TYPE_UID_LIST       },
    { "x-folder",         0, DND_DROP_TYPE_FOLDER         },
    { "message/rfc822",   0, DND_DROP_TYPE_MESSAGE_RFC822 },
    { "text/uri-list",    0, DND_DROP_TYPE_TEXT_URI_LIST  },
};

static GdkAtom drag_atoms[NUM_DRAG_TYPES];
static GdkAtom drop_atoms[NUM_DROP_TYPES];

static guint signals[LAST_SIGNAL] = { 0 };

extern CamelSession *session;

static void em_folder_tree_class_init (EMFolderTreeClass *klass);
static void em_folder_tree_init (EMFolderTree *emft);
static void em_folder_tree_destroy (GtkObject *obj);
static void em_folder_tree_finalize (GObject *obj);

static gboolean emft_save_state (EMFolderTree *emft);
static void emft_queue_save_state (EMFolderTree *emft);

static void emft_update_model_expanded_state (struct _EMFolderTreePrivate *priv, GtkTreeIter *iter, gboolean expanded);

static void emft_tree_row_activated (GtkTreeView *treeview, GtkTreePath *path, GtkTreeViewColumn *column, EMFolderTree *emft);
static void emft_tree_row_collapsed (GtkTreeView *treeview, GtkTreeIter *root, GtkTreePath *path, EMFolderTree *emft);
static void emft_tree_row_expanded (GtkTreeView *treeview, GtkTreeIter *root, GtkTreePath *path, EMFolderTree *emft);
static gboolean emft_tree_button_press (GtkTreeView *treeview, GdkEventButton *event, EMFolderTree *emft);
static void emft_tree_selection_changed (GtkTreeSelection *selection, EMFolderTree *emft);

struct _emft_selection_data {
    GtkTreeModel *model;
    GtkTreeIter *iter;
    gboolean set;
};

static GtkVBoxClass *parent_class = NULL;

GType
em_folder_tree_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (EMFolderTreeClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) em_folder_tree_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (EMFolderTree),
            0,    /* n_preallocs */
            (GInstanceInitFunc) em_folder_tree_init,
        };
        
        type = g_type_register_static (GTK_TYPE_VBOX, "EMFolderTree", &info, 0);
    }
    
    return type;
}

static void
em_folder_tree_class_init (EMFolderTreeClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (klass);
    
    parent_class = g_type_class_ref (GTK_TYPE_VBOX);
    
    object_class->finalize = em_folder_tree_finalize;
    gtk_object_class->destroy = em_folder_tree_destroy;
    
    signals[FOLDER_SELECTED] =
        g_signal_new ("folder-selected",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (EMFolderTreeClass, folder_selected),
                  NULL, NULL,
                  em_marshal_VOID__STRING_STRING_UINT,
                  G_TYPE_NONE, 3,
                  G_TYPE_STRING,
                  G_TYPE_STRING,
                  G_TYPE_UINT);
    
    signals[FOLDER_ACTIVATED] =
        g_signal_new ("folder-activated",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (EMFolderTreeClass, folder_activated),
                  NULL, NULL,
                  em_marshal_VOID__STRING_STRING,
                  G_TYPE_NONE, 2,
                  G_TYPE_STRING,
                  G_TYPE_STRING);
}

static gboolean
subdirs_contain_unread (GtkTreeModel *model, GtkTreeIter *root)
{
    unsigned int unread;
    GtkTreeIter iter;
    
    if (!gtk_tree_model_iter_children (model, &iter, root))
        return FALSE;
    
    do {
        gtk_tree_model_get (model, &iter, COL_UINT_UNREAD, &unread, -1);
        if (unread)
            return TRUE;
        
        if (gtk_tree_model_iter_has_child (model, &iter))
            if (subdirs_contain_unread (model, &iter))
                return TRUE;
    } while (gtk_tree_model_iter_next (model, &iter));
    
    return FALSE;
}


enum {
    FOLDER_ICON_NORMAL,
    FOLDER_ICON_INBOX,
    FOLDER_ICON_OUTBOX,
    FOLDER_ICON_TRASH,
    FOLDER_ICON_JUNK,
    FOLDER_ICON_LAST
};

static GdkPixbuf *folder_icons[FOLDER_ICON_LAST];

static void
render_pixbuf (GtkTreeViewColumn *column, GtkCellRenderer *renderer,
           GtkTreeModel *model, GtkTreeIter *iter, gpointer user_data)
{
    static gboolean initialised = FALSE;
    GdkPixbuf *pixbuf = NULL;
    gboolean is_store;
    char *path;
    
    if (!initialised) {
        folder_icons[FOLDER_ICON_NORMAL] = e_icon_factory_get_icon ("stock_folder", E_ICON_SIZE_MENU);
        folder_icons[FOLDER_ICON_INBOX] = e_icon_factory_get_icon ("stock_inbox", E_ICON_SIZE_MENU);
        folder_icons[FOLDER_ICON_OUTBOX] = e_icon_factory_get_icon ("stock_outbox", E_ICON_SIZE_MENU);
        folder_icons[FOLDER_ICON_TRASH] = e_icon_factory_get_icon ("stock_delete", E_ICON_SIZE_MENU);
        folder_icons[FOLDER_ICON_JUNK] = e_icon_factory_get_icon ("stock_spam", E_ICON_SIZE_MENU);
        initialised = TRUE;
    }
    
    gtk_tree_model_get (model, iter, COL_STRING_FOLDER_PATH, &path,
                COL_BOOL_IS_STORE, &is_store, -1);
    
    if (!is_store && path != NULL) {
        if (!strcasecmp (path, "/Inbox"))
            pixbuf = folder_icons[FOLDER_ICON_INBOX];
        else if (!strcasecmp (path, "/Outbox"))
            pixbuf = folder_icons[FOLDER_ICON_OUTBOX];
        else if (*path == '/' && !strcasecmp (path + 1, CAMEL_VTRASH_NAME))
            pixbuf = folder_icons[FOLDER_ICON_TRASH];
        else if (*path == '/' && !strcasecmp (path + 1, CAMEL_VJUNK_NAME))
            pixbuf = folder_icons[FOLDER_ICON_JUNK];
        else
            pixbuf = folder_icons[FOLDER_ICON_NORMAL];
    }
    
    g_object_set (renderer, "pixbuf", pixbuf, "visible", !is_store, NULL);
}

static void
render_display_name (GtkTreeViewColumn *column, GtkCellRenderer *renderer,
             GtkTreeModel *model, GtkTreeIter *iter, gpointer user_data)
{
    gboolean is_store, bold;
    unsigned int unread;
    char *display;
    char *name;
    
    gtk_tree_model_get (model, iter, COL_STRING_DISPLAY_NAME, &name,
                COL_BOOL_IS_STORE, &is_store,
                COL_UINT_UNREAD, &unread, -1);
    
    if (!(bold = is_store || unread)) {
        if (gtk_tree_model_iter_has_child (model, iter))
            bold = subdirs_contain_unread (model, iter);
    }
    
    if (!is_store && unread)
        display = g_strdup_printf ("%s (%u)", name, unread);
    else
        display = g_strdup (name);
    
    g_object_set (renderer, "text", display,
              "weight", bold ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL,
              NULL);
    
    g_free (display);
}

static gboolean
emft_select_func(GtkTreeSelection *selection, GtkTreeModel *model, GtkTreePath *path, gboolean selected, gpointer data)
{
    EMFolderTree *emft = data;
    gboolean is_store;
    guint32 flags;
    GtkTreeIter iter;

    /* NB: This will be called with selection==NULL from tree_row_activated */

    if (emft->priv->excluded == 0)
        return TRUE;

    if (!gtk_tree_model_get_iter(model, &iter, path))
        return TRUE;

    gtk_tree_model_get(model, &iter, COL_UINT_FLAGS, &flags, COL_BOOL_IS_STORE, &is_store, -1);
    if (is_store)
        flags |= CAMEL_FOLDER_NOSELECT;

    return (flags & emft->priv->excluded) == 0;
}

static void
em_folder_tree_init (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv;
    
    priv = g_new0 (struct _EMFolderTreePrivate, 1);
    priv->lost_folders = NULL;
    priv->selected_uri = NULL;
    priv->selected_path = NULL;
    priv->treeview = NULL;
    priv->model = NULL;
    priv->drag_row = NULL;
    
    emft->priv = priv;
}

static void
em_folder_tree_finalize (GObject *obj)
{
    EMFolderTree *emft = (EMFolderTree *) obj;

    /* clear list of lost uris */
    if (emft->priv->lost_folders) {
        g_list_foreach (emft->priv->lost_folders, (GFunc) g_free, NULL);
        g_list_free (emft->priv->lost_folders);
        emft->priv->lost_folders = NULL;
    }
    
    g_free (emft->priv->selected_uri);
    g_free (emft->priv->selected_path);
    g_free (emft->priv);
    
    G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
em_folder_tree_destroy (GtkObject *obj)
{
    EMFolderTree *emft = (EMFolderTree *) obj;
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    if (priv->loading_row_id != 0) {
        g_signal_handler_disconnect (priv->model, priv->loading_row_id);
        priv->loading_row_id = 0;
    }
    
    if (priv->loaded_row_id != 0) {
        g_signal_handler_disconnect (priv->model, priv->loaded_row_id);
        priv->loaded_row_id = 0;
    }
    
    if (priv->save_state_id != 0) {
        g_source_remove (priv->save_state_id);
        emft_save_state (emft);
    }
    
    if (priv->autoscroll_id != 0) {
        g_source_remove (priv->autoscroll_id);
        priv->autoscroll_id = 0;
    }
    
    if (priv->autoexpand_id != 0) {
        gtk_tree_row_reference_free (priv->autoexpand_row);
        priv->autoexpand_row = NULL;
        
        g_source_remove (priv->autoexpand_id);
        priv->autoexpand_id = 0;
    }
    
    priv->treeview = NULL;
    priv->model = NULL;
    
    GTK_OBJECT_CLASS (parent_class)->destroy (obj);
}

static GtkTreeView *
folder_tree_new (EMFolderTree *emft, EMFolderTreeModel *model)
{
    GtkTreeSelection *selection;
    GtkTreeViewColumn *column;
    GtkCellRenderer *renderer;
    GtkWidget *tree;
    
    tree = gtk_tree_view_new_with_model ((GtkTreeModel *) model);
    GTK_WIDGET_SET_FLAGS(tree, GTK_CAN_FOCUS);
    
    column = gtk_tree_view_column_new ();
    gtk_tree_view_append_column ((GtkTreeView *) tree, column);
    
    renderer = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (column, renderer, FALSE);
    gtk_tree_view_column_set_cell_data_func (column, renderer, render_pixbuf, NULL, NULL);
    
    renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_column_pack_start (column, renderer, TRUE);
    gtk_tree_view_column_set_cell_data_func (column, renderer, render_display_name, NULL, NULL);
    
    selection = gtk_tree_view_get_selection ((GtkTreeView *) tree);
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
    gtk_tree_selection_set_select_function(selection, emft_select_func, emft, NULL);
    gtk_tree_view_set_headers_visible ((GtkTreeView *) tree, FALSE);
    
    return (GtkTreeView *) tree;
}

static void
em_folder_tree_construct (EMFolderTree *emft, EMFolderTreeModel *model)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeSelection *selection;
    GtkWidget *scrolled;
    
    scrolled = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled),
                    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled), GTK_SHADOW_IN);
    
    priv->model = model;
    priv->treeview = folder_tree_new (emft, model);
    gtk_widget_show ((GtkWidget *) priv->treeview);
    
    g_signal_connect (priv->treeview, "row-expanded", G_CALLBACK (emft_tree_row_expanded), emft);
    g_signal_connect (priv->treeview, "row-collapsed", G_CALLBACK (emft_tree_row_collapsed), emft);
    g_signal_connect (priv->treeview, "row-activated", G_CALLBACK (emft_tree_row_activated), emft);
    g_signal_connect (priv->treeview, "button-press-event", G_CALLBACK (emft_tree_button_press), emft);
    
    selection = gtk_tree_view_get_selection ((GtkTreeView *) priv->treeview);
    g_signal_connect (selection, "changed", G_CALLBACK (emft_tree_selection_changed), emft);
    
    gtk_container_add ((GtkContainer *) scrolled, (GtkWidget *) priv->treeview);
    gtk_widget_show (scrolled);
    
    gtk_box_pack_start ((GtkBox *) emft, scrolled, TRUE, TRUE, 0);
}

GtkWidget *
em_folder_tree_new (void)
{
    EMFolderTreeModel *model;
    EMFolderTree *emft;
    
    model = em_folder_tree_model_new (mail_component_peek_base_directory (mail_component_peek ()));
    emft = (EMFolderTree *) em_folder_tree_new_with_model (model);
    g_object_unref (model);
    
    return (GtkWidget *) emft;
}

static void
emft_expand_node (EMFolderTreeModel *model, const char *key, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    struct _EMFolderTreeModelStoreInfo *si;
    extern CamelStore *vfolder_store;
    GtkTreeRowReference *row;
    GtkTreePath *path;
    EAccount *account;
    CamelStore *store;
    const char *p;
    char *uid;
    size_t n;
    
    if (!(p = strchr (key, '/')))
        n = strlen (key);
    else
        n = (p - key);
    
    uid = g_alloca (n + 1);
    memcpy (uid, key, n);
    uid[n] = '\0';
    
    if ((account = mail_config_get_account_by_uid (uid)) && account->enabled) {
        CamelException ex;
        
        camel_exception_init (&ex);
        store = (CamelStore *) camel_session_get_service (session, account->source->url, CAMEL_PROVIDER_STORE, &ex);
        camel_exception_clear (&ex);
        
        if (store == NULL)
            return;
    } else if (!strcmp (uid, "vfolder")) {
        if (!(store = vfolder_store))
            return;
        
        camel_object_ref (store);
    } else if (!strcmp (uid, "local")) {
        if (!(store = mail_component_peek_local_store (NULL)))
            return;
        
        camel_object_ref (store);
    } else {
        return;
    }
    
    if (!(si = g_hash_table_lookup (priv->model->store_hash, store))) {
        camel_object_unref (store);
        return;
    }
    
    camel_object_unref (store);
    
    if (p != NULL) {
        if (!(row = g_hash_table_lookup (si->path_hash, p)))
            return;
    } else
        row = si->row;
    
    path = gtk_tree_row_reference_get_path (row);
    gtk_tree_view_expand_row (priv->treeview, path, FALSE);
    gtk_tree_path_free (path);
}

static void
emft_maybe_expand_row (EMFolderTreeModel *model, GtkTreePath *tree_path, GtkTreeIter *iter, EMFolderTree *emft)
{
    struct _EMFolderTreeModelStoreInfo *si;
    CamelStore *store;
    EAccount *account;
    char *path, *key;
    
    gtk_tree_model_get ((GtkTreeModel *) model, iter,
                COL_STRING_FOLDER_PATH, &path,
                COL_POINTER_CAMEL_STORE, &store,
                -1);
    
    si = g_hash_table_lookup (model->store_hash, store);
    if ((account = mail_config_get_account_by_name (si->display_name))) {
            key = g_strdup_printf ("%s%s", account->uid, path);
    } else if (CAMEL_IS_VEE_STORE (store)) {
        /* vfolder store */
        key = g_strdup_printf ("vfolder%s", path);
    } else {
        /* local store */
        key = g_strdup_printf ("local%s", path);
    }
    
    if (em_folder_tree_model_get_expanded (model, key)) {
        gtk_tree_view_expand_to_path (emft->priv->treeview, tree_path);
        gtk_tree_view_expand_row (emft->priv->treeview, tree_path, FALSE);
    }
    
    g_free (key);
}

GtkWidget *
em_folder_tree_new_with_model (EMFolderTreeModel *model)
{
    EMFolderTree *emft;
    
    emft = g_object_new (EM_TYPE_FOLDER_TREE, NULL);
    em_folder_tree_construct (emft, model);
    g_object_ref (model);
    
    em_folder_tree_model_expand_foreach (model, (EMFTModelExpandFunc)emft_expand_node, emft);
    
    emft->priv->loading_row_id = g_signal_connect (model, "loading-row", G_CALLBACK (emft_maybe_expand_row), emft);
    emft->priv->loaded_row_id = g_signal_connect (model, "loaded-row", G_CALLBACK (emft_maybe_expand_row), emft);
    
    return (GtkWidget *) emft;
}

static void
tree_drag_begin (GtkWidget *widget, GdkDragContext *context, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    
    selection = gtk_tree_view_get_selection ((GtkTreeView *) widget);
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;
    
    path = gtk_tree_model_get_path (model, &iter);
    priv->drag_row = gtk_tree_row_reference_new (model, path);
    gtk_tree_path_free (path);
    
    /* FIXME: set a drag icon? */
}

static void
tree_drag_data_delete(GtkWidget *widget, GdkDragContext *context, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreePath *src_path;
    const char *full_name;
    gboolean is_store;
    CamelStore *store;
    CamelException ex;
    GtkTreeIter iter;
    char *path;
    
    if (!priv->drag_row || (src_path = gtk_tree_row_reference_get_path (priv->drag_row)))
        return;
    
    if (!gtk_tree_model_get_iter((GtkTreeModel *)priv->model, &iter, src_path))
        goto fail;

    gtk_tree_model_get((GtkTreeModel *)priv->model, &iter,
               COL_POINTER_CAMEL_STORE, &store,
               COL_STRING_FOLDER_PATH, &path,
               COL_BOOL_IS_STORE, &is_store, -1);
    
    if (is_store)
        goto fail;
    
    full_name = path[0] == '/' ? path + 1 : path;
    
    camel_exception_init(&ex);
    camel_store_delete_folder(store, full_name, &ex);
    if (camel_exception_is_set(&ex))
        camel_exception_clear(&ex);
fail:
    gtk_tree_path_free(src_path);
}

static void
tree_drag_data_get(GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection, guint info, guint time, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreePath *src_path;
    const char *full_name;
    CamelFolder *folder;
    CamelStore *store;
    CamelException ex;
    GtkTreeIter iter;
    char *path, *uri;
    
    if (!priv->drag_row || !(src_path = gtk_tree_row_reference_get_path(priv->drag_row)))
        return;
    
    if (!gtk_tree_model_get_iter((GtkTreeModel *)priv->model, &iter, src_path))
        goto fail;
    
    gtk_tree_model_get((GtkTreeModel *)priv->model, &iter,
               COL_POINTER_CAMEL_STORE, &store,
               COL_STRING_FOLDER_PATH, &path,
               COL_STRING_URI, &uri, -1);
    
    /* make sure user isn't trying to drag on a placeholder row */
    if (path == NULL)
        goto fail;
    
    full_name = path[0] == '/' ? path + 1 : path;
    
    camel_exception_init(&ex);
    
    switch (info) {
    case DND_DRAG_TYPE_FOLDER:
        /* dragging to a new location in the folder tree */
        gtk_selection_data_set(selection, drag_atoms[info], 8, uri, strlen (uri) + 1);
        break;
    case DND_DRAG_TYPE_TEXT_URI_LIST:
        /* dragging to nautilus or something, probably */
        if ((folder = camel_store_get_folder(store, full_name, 0, &ex))) {
            GPtrArray *uids = camel_folder_get_uids(folder);

            em_utils_selection_set_urilist(selection, folder, uids);
            camel_folder_free_uids(folder, uids);
            camel_object_unref(folder);
        }
        break;
    default:
        abort();
    }
    
    if (camel_exception_is_set(&ex))
        camel_exception_clear(&ex);
fail:
    gtk_tree_path_free(src_path);
}

/* TODO: Merge the drop handling code/menu's into one spot using a popup target for details */
/* Drop handling */
struct _DragDataReceivedAsync {
    struct _mail_msg msg;
    
    /* input data */
    GdkDragContext *context;

    /* Only selection->data and selection->length are valid */
    GtkSelectionData *selection;

    CamelStore *store;
    char *full_name;
    guint32 action;
    guint info;
    
    unsigned int move:1;
    unsigned int moved:1;
    unsigned int aborted:1;
};

static void
emft_drop_folder_rec (CamelStore *store, CamelFolderInfo *fi, const char *parent_name, CamelException *ex)
{
    CamelFolder *src, *dest;
    CamelFolderInfo *nfi;
    char *new_name;
    
    while (fi != NULL) {
        if (!(src = mail_tool_uri_to_folder (fi->uri, 0, ex)))
            break;
        
        /* handles dropping to the root properly */
        if (parent_name[0])
            new_name = g_strdup_printf ("%s/%s", parent_name, src->name);
        else
            new_name = g_strdup (src->name);
        
        if ((nfi = camel_store_create_folder (store, parent_name, src->name, ex))) {
            camel_store_free_folder_info (store, nfi);
            
            if (camel_store_supports_subscriptions (store))
                camel_store_subscribe_folder (store, new_name, ex);
            
            /* copy the folder to the new location */
            if ((dest = camel_store_get_folder (store, new_name, 0, ex))) {
                GPtrArray *uids;
                
                uids = camel_folder_get_uids (src);
                camel_folder_transfer_messages_to (src, uids, dest, NULL, FALSE, ex);
                camel_folder_free_uids (src, uids);
                
                camel_object_unref (dest);
            }
        }
        
        camel_object_unref (src);
        
        if (fi->child)
            emft_drop_folder_rec (store, fi->child, new_name, ex);
        
        g_free (new_name);
        fi = fi->next;
    }
}

static void
emft_drop_folder(struct _DragDataReceivedAsync *m)
{
    CamelFolder *src;
    char *new_name;

    d(printf(" * Drop folder '%s' onto '%s'\n", m->selection->data, m->full_name));

    if (!(src = mail_tool_uri_to_folder(m->selection->data, 0, &m->msg.ex)))
        return;
    
    /* handles dropping to the root properly */
    if (m->full_name[0])
        new_name = g_strdup_printf("%s/%s", m->full_name, src->name);
    else
        new_name = g_strdup(src->name);
    
    if (src->parent_store == m->store && m->move) {
        /* simple case, rename */
        camel_store_rename_folder(m->store, src->full_name, new_name, &m->msg.ex);
        m->moved = !camel_exception_is_set (&m->msg.ex);
    } else {
        CamelFolderInfo *fi, *nfi;
        
        /* FIXME: should check we're not coming from a vfolder, otherwise bad stuff could happen */
        
        if ((fi = camel_store_get_folder_info (src->parent_store, src->full_name, CAMEL_STORE_FOLDER_INFO_FAST |
                               CAMEL_STORE_FOLDER_INFO_RECURSIVE, &m->msg.ex))) {
            if (!(nfi = camel_store_get_folder_info (m->store, new_name, CAMEL_STORE_FOLDER_INFO_FAST, &m->msg.ex))) {
                /* Good. The folder doesn't already exist... */
                camel_exception_clear (&m->msg.ex);
                emft_drop_folder_rec (m->store, fi, m->full_name, &m->msg.ex);
            }
            
            camel_store_free_folder_info (src->parent_store, fi);
        }
    }
    
    g_free(new_name);
    camel_object_unref(src);
}

static char *
emft_drop_async_desc (struct _mail_msg *mm, int done)
{
    struct _DragDataReceivedAsync *m = (struct _DragDataReceivedAsync *) mm;
    CamelURL *url;
    char *buf;
    
    if (m->info == DND_DROP_TYPE_FOLDER) {
        url = camel_url_new (m->selection->data, NULL);
        
        if (m->move)
            buf = g_strdup_printf (_("Moving folder %s"), url->fragment ? url->fragment : url->path + 1);
        else
            buf = g_strdup_printf (_("Copying folder %s"), url->fragment ? url->fragment : url->path + 1);
        
        camel_url_free (url);
        
        return buf;
    } else {
        if (m->move)
            return g_strdup_printf (_("Moving messages into folder %s"), m->full_name);
        else
            return g_strdup_printf (_("Copying messages into folder %s"), m->full_name);
    }
}

static void
emft_drop_async_drop (struct _mail_msg *mm)
{
    struct _DragDataReceivedAsync *m = (struct _DragDataReceivedAsync *) mm;
    CamelFolder *folder;
    
    /* for types other than folder, we can't drop to the root path */
    if (m->info == DND_DROP_TYPE_FOLDER) {
        /* copy or move (aka rename) a folder */
        emft_drop_folder(m);
    } else if (m->full_name[0] == 0) {
        camel_exception_set (&mm->ex, CAMEL_EXCEPTION_SYSTEM,
                     _("Cannot drop message(s) into toplevel store"));
    } else if ((folder = camel_store_get_folder (m->store, m->full_name, 0, &mm->ex))) {
        switch (m->info) {
        case DND_DROP_TYPE_UID_LIST:
            /* import a list of uids from another evo folder */
            em_utils_selection_get_uidlist(m->selection, folder, m->move, &mm->ex);
            m->moved = m->move && !camel_exception_is_set(&mm->ex);
            break;
        case DND_DROP_TYPE_MESSAGE_RFC822:
            /* import a message/rfc822 stream */
            em_utils_selection_get_message(m->selection, folder);
            break;
        case DND_DROP_TYPE_TEXT_URI_LIST:
            /* import an mbox, maildir, or mh folder? */
            em_utils_selection_get_mailbox(m->selection, folder);
            break;
        default:
            abort();
        }
        camel_object_unref(folder);
    }
}

static void
emft_drop_async_done (struct _mail_msg *mm)
{
    struct _DragDataReceivedAsync *m = (struct _DragDataReceivedAsync *) mm;
    gboolean success, delete;
    
    /* ?? */
    if (m->aborted) {
        success = FALSE;
        delete = FALSE;
    } else {
        success = !camel_exception_is_set (&mm->ex);
        delete = success && m->move && !m->moved;
    }
    
    gtk_drag_finish (m->context, success, delete, GDK_CURRENT_TIME);
}

static void
emft_drop_async_free (struct _mail_msg *mm)
{
    struct _DragDataReceivedAsync *m = (struct _DragDataReceivedAsync *) mm;
    
    g_object_unref(m->context);
    camel_object_unref(m->store);
    g_free(m->full_name);

    g_free(m->selection->data);
    g_free(m->selection);
}

static struct _mail_msg_op emft_drop_async_op = {
    emft_drop_async_desc,
    emft_drop_async_drop,
    emft_drop_async_done,
    emft_drop_async_free,
};

static void
tree_drag_data_action(struct _DragDataReceivedAsync *m)
{
    m->move = m->action == GDK_ACTION_MOVE;
    e_thread_put (mail_thread_new, (EMsg *) m);
}

static void
emft_drop_popup_copy(GtkWidget *item, struct _DragDataReceivedAsync *m)
{
    m->action = GDK_ACTION_COPY;
    tree_drag_data_action(m);
}

static void
emft_drop_popup_move(GtkWidget *item, struct _DragDataReceivedAsync *m)
{
    m->action = GDK_ACTION_MOVE;
    tree_drag_data_action(m);
}

static void
emft_drop_popup_cancel(GtkWidget *item, struct _DragDataReceivedAsync *m)
{
    m->aborted = TRUE;
    mail_msg_free(&m->msg);
}

static EMPopupItem emft_drop_popup_menu[] = {
    { EM_POPUP_ITEM, "00.emc.00", N_("_Copy to Folder"), G_CALLBACK (emft_drop_popup_copy), NULL, NULL, 1 },
    { EM_POPUP_ITEM, "00.emc.01", N_("_Move to Folder"), G_CALLBACK (emft_drop_popup_move), NULL, NULL, 1 },
    { EM_POPUP_ITEM, "00.emc.02", N_("_Copy"), G_CALLBACK (emft_drop_popup_copy), NULL, "stock_folder-copy", 2 },
    { EM_POPUP_ITEM, "00.emc.03", N_("_Move"), G_CALLBACK (emft_drop_popup_move), NULL, "stock_folder-move", 2 },
    { EM_POPUP_BAR, "10.emc" },
    { EM_POPUP_ITEM, "99.emc.00", N_("Cancel _Drag"), G_CALLBACK (emft_drop_popup_cancel), NULL, "stock_cancel", 0 },
};

static void
tree_drag_data_received(GtkWidget *widget, GdkDragContext *context, int x, int y, GtkSelectionData *selection, guint info, guint time, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeViewDropPosition pos;
    GtkTreePath *dest_path;
    struct _DragDataReceivedAsync *m;
    const char *full_name;
    CamelStore *store;
    GtkTreeIter iter;
    char *path;
    int i;

    printf("drag data received, action %d\n", context->action);
    
    if (!gtk_tree_view_get_dest_row_at_pos (priv->treeview, x, y, &dest_path, &pos))
        return;
    
    /* this means we are receiving no data */
    if (!selection->data || selection->length == -1) {
        gtk_drag_finish(context, FALSE, FALSE, GDK_CURRENT_TIME);
        return;
    }
    
    if (!gtk_tree_model_get_iter((GtkTreeModel *)priv->model, &iter, dest_path)) {
        gtk_drag_finish(context, FALSE, FALSE, GDK_CURRENT_TIME);
        return;
    }
    
    gtk_tree_model_get((GtkTreeModel *)priv->model, &iter,
               COL_POINTER_CAMEL_STORE, &store,
               COL_STRING_FOLDER_PATH, &path, -1);
    
    /* make sure user isn't try to drop on a placeholder row */
    if (path == NULL) {
        gtk_drag_finish (context, FALSE, FALSE, GDK_CURRENT_TIME);
        return;
    }

    full_name = path[0] == '/' ? path + 1 : path;
    
    m = mail_msg_new (&emft_drop_async_op, NULL, sizeof (struct _DragDataReceivedAsync));
    m->context = context;
    g_object_ref(context);
    m->store = store;
    camel_object_ref(store);
    m->full_name = g_strdup (full_name);
    m->action = context->action;
    m->info = info;

    /* need to copy, goes away once we exit */
    m->selection = g_malloc0(sizeof(*m->selection));
    m->selection->data = g_malloc(selection->length);
    memcpy(m->selection->data, selection->data, selection->length);
    m->selection->length = selection->length;

    if (context->action == GDK_ACTION_ASK) {
        EMPopup *emp;
        int mask;
        GSList *menus = NULL;
        GtkMenu *menu;

        emp = em_popup_new("com.ximian.mail.storageset.popup.drop");
        if (info != DND_DROP_TYPE_FOLDER)
            mask = ~1;
        else
            mask = ~2;

        for (i=0;i<sizeof(emft_drop_popup_menu)/sizeof(emft_drop_popup_menu[0]);i++) {
            EMPopupItem *item = &emft_drop_popup_menu[i];

            if ((item->mask & mask) == 0) {
                item->activate_data = m;
                menus = g_slist_append(menus, item);
            }
        }
        em_popup_add_items(emp, menus, (GDestroyNotify)g_slist_free);
        menu = em_popup_create_menu_once(emp, NULL, mask, mask);
        gtk_menu_popup(menu, NULL, NULL, NULL, NULL, 0, gtk_get_current_event_time());
    } else {
        tree_drag_data_action(m);
    }
}

static gboolean
is_special_local_folder (const char *name)
{
    return (!strcmp (name, "Drafts") || !strcmp (name, "Inbox") || !strcmp (name, "Outbox") || !strcmp (name, "Sent"));
}

static GdkAtom
emft_drop_target(EMFolderTree *emft, GdkDragContext *context, GtkTreePath *path)
{
    struct _EMFolderTreePrivate *p = emft->priv;
    char *uri, *folder_path, *src_uri = NULL;
    CamelStore *local, *sstore, *dstore;
    gboolean is_store;
    GtkTreeIter iter;
    GList *targets;
    
    /* This is a bit of a mess, but should handle all the cases properly */

    if (!gtk_tree_model_get_iter((GtkTreeModel *)p->model, &iter, path))
        return GDK_NONE;
    
    gtk_tree_model_get((GtkTreeModel *)p->model, &iter, COL_BOOL_IS_STORE, &is_store,
               COL_STRING_FOLDER_PATH, &folder_path,
               COL_POINTER_CAMEL_STORE, &dstore,
               COL_STRING_URI, &uri, -1);
    
    local = mail_component_peek_local_store (NULL);
    
    targets = context->targets;
    
    /* Check for special destinations */
    if (uri && folder_path) {
        folder_path = folder_path[0] == '/' ? folder_path + 1 : folder_path;
        
#if 0
        /* only allow copying/moving folders (not messages) into the local Outbox */
        if (dstore == local && !strcmp (folder_path, "Outbox")) {
            GdkAtom xfolder;
            
            xfolder = drop_atoms[DND_DROP_TYPE_FOLDER];
            while (targets != NULL) {
                if (targets->data == (gpointer) xfolder)
                    return xfolder;
                
                targets = targets->next;
            }
            
            return GDK_NONE;
        }
#endif
        
        /* don't allow copying/moving into the UNMATCHED vfolder */
        if (!strncmp (uri, "vfolder:", 8) && !strcmp (folder_path, CAMEL_UNMATCHED_NAME))
            return GDK_NONE;
        
        /* don't allow copying/moving into a vTrash/vJunk folder */
        if (!strcmp (folder_path, CAMEL_VTRASH_NAME)
            || !strcmp (folder_path, CAMEL_VJUNK_NAME))
            return GDK_NONE;
    }
    
    if (p->drag_row) {
        GtkTreePath *src_path = gtk_tree_row_reference_get_path(p->drag_row);
        
        if (src_path) {
            if (gtk_tree_model_get_iter((GtkTreeModel *)p->model, &iter, src_path))
                gtk_tree_model_get((GtkTreeModel *)p->model, &iter,
                           COL_POINTER_CAMEL_STORE, &sstore,
                           COL_STRING_URI, &src_uri, -1);
            
            /* can't dnd onto itself or below itself - bad things happen,
               no point dragging to where we were either */
            if (gtk_tree_path_compare(path, src_path) == 0
                || gtk_tree_path_is_descendant(path, src_path)
                || (gtk_tree_path_is_ancestor(path, src_path)
                && gtk_tree_path_get_depth(path) == gtk_tree_path_get_depth(src_path)-1)) {
                gtk_tree_path_free(src_path);
                return GDK_NONE;
            }
            
            gtk_tree_path_free(src_path);
        }
    }
    
    /* Check for special sources, and vfolder stuff */
    if (src_uri) {
        CamelURL *url;
        char *path;
        
        /* FIXME: this is a total hack, but i think all we can do at present */
        /* Check for dragging from special folders which can't be moved/copied */
        url = camel_url_new(src_uri, NULL);
        path = url->fragment?url->fragment:url->path;
        if (path && path[0]) {
            /* don't allow moving any of the the local special folders */
            if (sstore == local && is_special_local_folder (path)) {
                GdkAtom xfolder;
                
                camel_url_free (url);
                
                /* TODO: not sure if this is legal, but it works, force copy for special local folders */
                context->suggested_action = GDK_ACTION_COPY;
                xfolder = drop_atoms[DND_DROP_TYPE_FOLDER];
                while (targets != NULL) {
                    if (targets->data == (gpointer) xfolder)
                        return xfolder;
                    
                    targets = targets->next;
                }
                
                return GDK_NONE;
            }
            
            /* don't allow copying/moving of the UNMATCHED vfolder */
            if (!strcmp (url->protocol, "vfolder") && !strcmp (path, CAMEL_UNMATCHED_NAME)) {
                camel_url_free (url);
                return GDK_NONE;
            }
            
            /* don't allow copying/moving of any vTrash/vJunk folder nor maildir 'inbox' */
            if (strcmp(path, CAMEL_VTRASH_NAME) == 0
                || strcmp(path, CAMEL_VJUNK_NAME) == 0
                /* Dont allow drag from maildir 'inbox' */
                || strcmp(path, ".") == 0) {
                camel_url_free(url);
                return GDK_NONE;
            }
        }
        camel_url_free(url);
        
        /* vFolders can only be dropped into other vFolders */
        if (strncmp(src_uri, "vfolder:", 8) == 0) {
            /* TODO: not sure if this is legal, but it works, force move only for vfolders */
            context->suggested_action = GDK_ACTION_MOVE;

            if (uri && strncmp(uri, "vfolder:", 8) == 0) {
                GdkAtom xfolder;

                xfolder = drop_atoms[DND_DROP_TYPE_FOLDER];
                while (targets != NULL) {
                    if (targets->data == (gpointer) xfolder)
                        return xfolder;
                    
                    targets = targets->next;
                }
            }

            return GDK_NONE;
        }
    }

    /* can't drag anything but a vfolder into a vfolder */
    if (uri && strncmp(uri, "vfolder:", 8) == 0)
        return GDK_NONE;

    /* Now we either have a store or a normal folder */
    
    if (is_store) {
        GdkAtom xfolder;

        xfolder = drop_atoms[DND_DROP_TYPE_FOLDER];
        while (targets != NULL) {
            if (targets->data == (gpointer) xfolder)
                return xfolder;
            
            targets = targets->next;
        }
    } else {
        int i;

        while (targets != NULL) {
            for (i = 0; i < NUM_DROP_TYPES; i++) {
                if (targets->data == (gpointer) drop_atoms[i])
                    return drop_atoms[i];
            }
            
            targets = targets->next;
        }
    }
    
    return GDK_NONE;
}

static gboolean
tree_drag_drop (GtkWidget *widget, GdkDragContext *context, int x, int y, guint time, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeViewColumn *column;
    int cell_x, cell_y;
    GtkTreePath *path;
    GdkAtom target;
    
    if (priv->autoscroll_id != 0) {
        g_source_remove (priv->autoscroll_id);
        priv->autoscroll_id = 0;
    }
    
    if (priv->autoexpand_id != 0) {
        gtk_tree_row_reference_free (priv->autoexpand_row);
        priv->autoexpand_row = NULL;
        
        g_source_remove (priv->autoexpand_id);
        priv->autoexpand_id = 0;
    }
    
    if (!gtk_tree_view_get_path_at_pos (priv->treeview, x, y, &path, &column, &cell_x, &cell_y))
        return FALSE;
    
    target = emft_drop_target(emft, context, path);
    gtk_tree_path_free (path);
    if (target == GDK_NONE)
        return FALSE;
    
    return TRUE;
}

static void
tree_drag_end (GtkWidget *widget, GdkDragContext *context, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    if (priv->drag_row) {
        gtk_tree_row_reference_free (priv->drag_row);
        priv->drag_row = NULL;
    }

    /* FIXME: undo anything done in drag-begin */
}

static void
tree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    if (priv->autoscroll_id != 0) {
        g_source_remove (priv->autoscroll_id);
        priv->autoscroll_id = 0;
    }
    
    if (priv->autoexpand_id != 0) {
        gtk_tree_row_reference_free (priv->autoexpand_row);
        priv->autoexpand_row = NULL;
        
        g_source_remove (priv->autoexpand_id);
        priv->autoexpand_id = 0;
    }
    
    gtk_tree_view_set_drag_dest_row(emft->priv->treeview, NULL, GTK_TREE_VIEW_DROP_BEFORE);
}


#define SCROLL_EDGE_SIZE 15

static gboolean
tree_autoscroll (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkAdjustment *vadjustment;
    GdkRectangle rect;
    GdkWindow *window;
    int offset, y;
    float value;
    
    /* get the y pointer position relative to the treeview */
    window = gtk_tree_view_get_bin_window (priv->treeview);
    gdk_window_get_pointer (window, NULL, &y, NULL);
    
    /* rect is in coorinates relative to the scrolled window relative to the treeview */
    gtk_tree_view_get_visible_rect (priv->treeview, &rect);
    
    /* move y into the same coordinate system as rect */
    y += rect.y;
    
    /* see if we are near the top edge */
    if ((offset = y - (rect.y + 2 * SCROLL_EDGE_SIZE)) > 0) {
        /* see if we are near the bottom edge */
        if ((offset = y - (rect.y + rect.height - 2 * SCROLL_EDGE_SIZE)) < 0)
            return TRUE;
    }
    
    vadjustment = gtk_tree_view_get_vadjustment (priv->treeview);
    
    value = CLAMP (vadjustment->value + offset, 0.0, vadjustment->upper - vadjustment->page_size);
    gtk_adjustment_set_value (vadjustment, value);
    
    return TRUE;
}

static gboolean
tree_autoexpand (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreePath *path;
    
    path = gtk_tree_row_reference_get_path (priv->autoexpand_row);
    gtk_tree_view_expand_row (priv->treeview, path, FALSE);
    gtk_tree_path_free (path);
    
    return TRUE;
}

static gboolean
tree_drag_motion (GtkWidget *widget, GdkDragContext *context, int x, int y, guint time, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeModel *model = (GtkTreeModel *) priv->model;
    GtkTreeViewDropPosition pos;
    GdkDragAction action = 0;
    GtkTreePath *path;
    GtkTreeIter iter;
    GdkAtom target;
    int i;
    
    if (!gtk_tree_view_get_dest_row_at_pos(priv->treeview, x, y, &path, &pos))
        return FALSE;
    
    if (priv->autoscroll_id == 0)
        priv->autoscroll_id = g_timeout_add (150, (GSourceFunc) tree_autoscroll, emft);
    
    gtk_tree_model_get_iter (model, &iter, path);
    
    if (gtk_tree_model_iter_has_child (model, &iter) && !gtk_tree_view_row_expanded (priv->treeview, path)) {
        if (priv->autoexpand_id != 0) {
            GtkTreePath *autoexpand_path;
            
            autoexpand_path = gtk_tree_row_reference_get_path (priv->autoexpand_row);
            if (gtk_tree_path_compare (autoexpand_path, path) != 0) {
                /* row changed, restart timer */
                gtk_tree_row_reference_free (priv->autoexpand_row);
                priv->autoexpand_row = gtk_tree_row_reference_new (model, path);
                g_source_remove (priv->autoexpand_id);
                priv->autoexpand_id = g_timeout_add (600, (GSourceFunc) tree_autoexpand, emft);
            }
            
            gtk_tree_path_free (autoexpand_path);
        } else {
            priv->autoexpand_id = g_timeout_add (600, (GSourceFunc) tree_autoexpand, emft);
            priv->autoexpand_row = gtk_tree_row_reference_new (model, path);
        }
    } else if (priv->autoexpand_id != 0) {
        gtk_tree_row_reference_free (priv->autoexpand_row);
        priv->autoexpand_row = NULL;
        
        g_source_remove (priv->autoexpand_id);
        priv->autoexpand_id = 0;
    }

    target = emft_drop_target(emft, context, path);
    if (target != GDK_NONE) {
        for (i=0; i<NUM_DROP_TYPES; i++) {
            if (drop_atoms[i] == target) {
                switch (i) {
                case DND_DROP_TYPE_UID_LIST:
                case DND_DROP_TYPE_FOLDER:
                    action = context->suggested_action;
                    if (action == GDK_ACTION_COPY && (context->actions & GDK_ACTION_MOVE))
                        action = GDK_ACTION_MOVE;
                    gtk_tree_view_set_drag_dest_row(priv->treeview, path, GTK_TREE_VIEW_DROP_INTO_OR_AFTER);
                    break;
                default:
                    gtk_tree_view_set_drag_dest_row(priv->treeview, path, GTK_TREE_VIEW_DROP_INTO_OR_AFTER);
                    action = context->suggested_action;
                    break;
                }
                break;
            }
        }
    }

    gtk_tree_path_free(path);
    
    gdk_drag_status(context, action, time);
    
    return action != 0;
}

void
em_folder_tree_enable_drag_and_drop (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv;
    static int setup = 0;
    int i;
    
    g_return_if_fail (EM_IS_FOLDER_TREE (emft));
    
    priv = emft->priv;
    if (!setup) {
        for (i=0; i<NUM_DRAG_TYPES; i++)
            drag_atoms[i] = gdk_atom_intern(drag_types[i].target, FALSE);
    
        for (i=0; i<NUM_DROP_TYPES; i++)
            drop_atoms[i] = gdk_atom_intern(drop_types[i].target, FALSE);

        setup = 1;
    }

    gtk_drag_source_set((GtkWidget *)priv->treeview, GDK_BUTTON1_MASK, drag_types, NUM_DRAG_TYPES, GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_ASK);
    gtk_drag_dest_set((GtkWidget *)priv->treeview, GTK_DEST_DEFAULT_ALL, drop_types, NUM_DROP_TYPES, GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_ASK);
    
    g_signal_connect (priv->treeview, "drag-begin", G_CALLBACK (tree_drag_begin), emft);
    g_signal_connect (priv->treeview, "drag-data-delete", G_CALLBACK (tree_drag_data_delete), emft);
    g_signal_connect (priv->treeview, "drag-data-get", G_CALLBACK (tree_drag_data_get), emft);
    g_signal_connect (priv->treeview, "drag-data-received", G_CALLBACK (tree_drag_data_received), emft);
    g_signal_connect (priv->treeview, "drag-drop", G_CALLBACK (tree_drag_drop), emft);
    g_signal_connect (priv->treeview, "drag-end", G_CALLBACK (tree_drag_end), emft);
    g_signal_connect (priv->treeview, "drag-leave", G_CALLBACK (tree_drag_leave), emft);
    g_signal_connect (priv->treeview, "drag-motion", G_CALLBACK (tree_drag_motion), emft);
}

void
em_folder_tree_set_multiselect (EMFolderTree *tree, gboolean mode)
{
    GtkTreeSelection *sel = gtk_tree_view_get_selection ((GtkTreeView *) tree->priv->treeview);
    
    tree->priv->do_multiselect = mode;
    gtk_tree_selection_set_mode (sel, mode ? GTK_SELECTION_MULTIPLE : GTK_SELECTION_SINGLE);
}

void em_folder_tree_set_excluded(EMFolderTree *emft, guint32 flags)
{
    emft->priv->excluded = flags;
}

GList *
em_folder_tree_get_selected_uris (EMFolderTree *emft)
{
    GtkTreeSelection *selection = gtk_tree_view_get_selection (emft->priv->treeview);
    GList *list = NULL, *rows, *l;
    GtkTreeModel *model;

    /* at first, add lost uris */
    for (l = emft->priv->lost_folders; l; l = g_list_next(l))
        list = g_list_append (l, g_strdup (l->data));

    rows = gtk_tree_selection_get_selected_rows(selection, &model);
    for (l=rows; l; l=g_list_next(l)) {
        GtkTreeIter iter;
        GtkTreePath *path = l->data;

        if (gtk_tree_model_get_iter(model, &iter, path)) {
            char *uri;

            gtk_tree_model_get(model, &iter, COL_STRING_URI, &uri, -1);
            list = g_list_append(list, g_strdup(uri));
        }
        gtk_tree_path_free(path);
    }
    g_list_free(rows);

    return list;
}

static void
get_selected_uris_path_iterate (GtkTreeModel *model, GtkTreePath *treepath, GtkTreeIter *iter, gpointer data)
{
    GList **list = (GList **) data;
    char *path;
    
    gtk_tree_model_get (model, iter, COL_STRING_FOLDER_PATH, &path, -1);
    *list = g_list_append (*list, g_strdup (path));
}

GList *
em_folder_tree_get_selected_paths (EMFolderTree *emft)
{
    GtkTreeSelection *selection = gtk_tree_view_get_selection (emft->priv->treeview);
    GList *list = NULL;
    
    gtk_tree_selection_selected_foreach (selection, get_selected_uris_path_iterate, &list);
    
    return list;
}

void
em_folder_tree_set_selected_list (EMFolderTree *emft, GList *list)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    /* clear list of lost uris */
    if (priv->lost_folders) {
        g_list_foreach (priv->lost_folders, (GFunc)g_free, NULL);
        g_list_free (priv->lost_folders);
        priv->lost_folders = NULL;
    }
    
    while (list) {
        em_folder_tree_set_selected (emft, list->data);
        list = g_list_next (list);
    }
}


#if 0
static void
dump_fi (CamelFolderInfo *fi, int depth)
{
    int i;
    
    while (fi != NULL) {
        for (i = 0; i < depth; i++)
            fputs ("  ", stdout);
        
        printf ("path='%s'; full_name='%s'\n", fi->path, fi->full_name);
        
        if (fi->child)
            dump_fi (fi->child, depth + 1);
        
        fi = fi->sibling;
    }
}
#endif

struct _EMFolderTreeGetFolderInfo {
    struct _mail_msg msg;
    
    /* input data */
    GtkTreeRowReference *root;
    EMFolderTree *emft;
    CamelStore *store;
    guint32 flags;
    char *top;
    
    /* output data */
    CamelFolderInfo *fi;
    
    /* uri to select if any after the op is done */
    char *select_uri;
};

static void
emft_get_folder_info__get (struct _mail_msg *mm)
{
    struct _EMFolderTreeGetFolderInfo *m = (struct _EMFolderTreeGetFolderInfo *) mm;
    guint32 flags = m->flags;
    
    if (camel_store_supports_subscriptions (m->store))
        flags |= CAMEL_STORE_FOLDER_INFO_SUBSCRIBED;
    
    m->fi = camel_store_get_folder_info (m->store, m->top, flags, &mm->ex);
}

static void
emft_get_folder_info__got (struct _mail_msg *mm)
{
    struct _EMFolderTreeGetFolderInfo *m = (struct _EMFolderTreeGetFolderInfo *) mm;
    struct _EMFolderTreePrivate *priv = m->emft->priv;
    struct _EMFolderTreeModelStoreInfo *si;
    GtkTreeIter root, iter;
    CamelFolderInfo *fi;
    GtkTreeStore *model;
    GtkTreePath *path;
    gboolean load;
    
    /* check that we haven't been destroyed */
    if (priv->treeview == NULL)
        return;
    
    /* check that our parent folder hasn't been deleted/unsubscribed */
    if (!gtk_tree_row_reference_valid (m->root))
        return;
    
    if (!(si = g_hash_table_lookup (priv->model->store_hash, m->store))) {
        /* store has been removed in the interim - do nothing */
        return;
    }
    
    model = (GtkTreeStore *) gtk_tree_view_get_model (priv->treeview);
    
    path = gtk_tree_row_reference_get_path (m->root);
    gtk_tree_model_get_iter ((GtkTreeModel *) model, &root, path);
    gtk_tree_path_free (path);
    
    /* make sure we still need to load the tree subfolders... */
    gtk_tree_model_get ((GtkTreeModel *) model, &root,
                COL_BOOL_LOAD_SUBDIRS, &load,
                -1);
    if (!load) {
        if (priv->do_multiselect && m->select_uri)
            priv->lost_folders = g_list_append (priv->lost_folders, g_strdup (m->select_uri));
        return;
    }
    
    /* get the first child (which will be a dummy node) */
    gtk_tree_model_iter_children ((GtkTreeModel *) model, &iter, &root);
    
    /* FIXME: camel's IMAP code is totally on crack here, @top's
     * folder info should be @fi and fi->child should be what we
     * want to fill our tree with... *sigh* */
    if (m->top && m->fi && !strcmp (m->fi->full_name, m->top)) {
        if (!(fi = m->fi->child))
            fi = m->fi->next;
    } else
        fi = m->fi;
    
    if (fi == NULL) {
        /* no children afterall... remove the "Loading..." placeholder node */
        emft_update_model_expanded_state (priv, &root, FALSE);
        gtk_tree_store_remove (model, &iter);
    } else {
        int fully_loaded = (m->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) ? TRUE : FALSE;
        
        do {
            em_folder_tree_model_set_folder_info (priv->model, &iter, si, fi, fully_loaded);
            
            if ((fi = fi->next) != NULL)
                gtk_tree_store_append (model, &iter, &root);
        } while (fi != NULL);
    }
    
    gtk_tree_store_set (model, &root, COL_BOOL_LOAD_SUBDIRS, FALSE, -1);
    
    if (m->select_uri)
        em_folder_tree_set_selected (m->emft, m->select_uri);
    
    emft_queue_save_state (m->emft);
}

static void
emft_get_folder_info__free (struct _mail_msg *mm)
{
    struct _EMFolderTreeGetFolderInfo *m = (struct _EMFolderTreeGetFolderInfo *) mm;
    
    camel_store_free_folder_info (m->store, m->fi);
    
    gtk_tree_row_reference_free (m->root);
    g_object_unref(m->emft);
    camel_object_unref (m->store);
    g_free (m->select_uri);
    g_free (m->top);
}

static struct _mail_msg_op get_folder_info_op = {
    NULL,
    emft_get_folder_info__get,
    emft_get_folder_info__got,
    emft_get_folder_info__free,
};

static void
emft_update_model_expanded_state (struct _EMFolderTreePrivate *priv, GtkTreeIter *iter, gboolean expanded)
{
    struct _EMFolderTreeModelStoreInfo *si;
    CamelStore *store;
    EAccount *account;
    char *path, *key;
    
    gtk_tree_model_get ((GtkTreeModel *) priv->model, iter,
                COL_STRING_FOLDER_PATH, &path,
                COL_POINTER_CAMEL_STORE, &store,
                -1);
    
    si = g_hash_table_lookup (priv->model->store_hash, store);
    if ((account = mail_config_get_account_by_name (si->display_name))) {
            key = g_strdup_printf ("%s%s", account->uid, path);
    } else if (CAMEL_IS_VEE_STORE (store)) {
        /* vfolder store */
        key = g_strdup_printf ("vfolder%s", path);
    } else {
        /* local store */
        key = g_strdup_printf ("local%s", path);
    }
    
    em_folder_tree_model_set_expanded (priv->model, key, expanded);
    g_free (key);
}

static void
emft_tree_row_expanded (GtkTreeView *treeview, GtkTreeIter *root, GtkTreePath *tree_path, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    struct _EMFolderTreeGetFolderInfo *m;
    GtkTreeModel *model;
    CamelStore *store;
    const char *top;
    gboolean load;
    char *path;
    
    model = gtk_tree_view_get_model (treeview);
    
    gtk_tree_model_get (model, root,
                COL_STRING_FOLDER_PATH, &path,
                COL_POINTER_CAMEL_STORE, &store,
                COL_BOOL_LOAD_SUBDIRS, &load,
                -1);
    
    emft_update_model_expanded_state (priv, root, TRUE);
    
    if (!load) {
        emft_queue_save_state (emft);
        return;
    }
    
    if (!path || !strcmp (path, "/"))
        top = NULL;
    else
        top = path + 1;
    
    m = mail_msg_new (&get_folder_info_op, NULL, sizeof (struct _EMFolderTreeGetFolderInfo));
    m->root = gtk_tree_row_reference_new (model, tree_path);
    camel_object_ref (store);
    m->store = store;
    m->emft = emft;
    g_object_ref(emft);
    m->top = g_strdup (top);
    m->flags = CAMEL_STORE_FOLDER_INFO_RECURSIVE;
    m->select_uri = NULL;
    
    e_thread_put (mail_thread_new, (EMsg *) m);
}

static void
emft_tree_row_collapsed (GtkTreeView *treeview, GtkTreeIter *root, GtkTreePath *tree_path, EMFolderTree *emft)
{
    gtk_tree_view_set_cursor (treeview, tree_path, NULL, FALSE);
    
    emft_update_model_expanded_state (emft->priv, root, FALSE);
    emft_queue_save_state (emft);
}

static void
emft_tree_row_activated (GtkTreeView *treeview, GtkTreePath *tree_path, GtkTreeViewColumn *column, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeModel *model = (GtkTreeModel *) priv->model;
    GtkTreeIter iter;
    char *path, *uri;
    guint32 flags;
    
    if (!emft_select_func(NULL, model, tree_path, FALSE, emft))
        return;
    
    if (!gtk_tree_model_get_iter (model, &iter, tree_path))
        return;
    
    gtk_tree_model_get (model, &iter, COL_STRING_FOLDER_PATH, &path,
                COL_STRING_URI, &uri, COL_UINT_FLAGS, &flags, -1);
    
    g_free (priv->selected_uri);
    priv->selected_uri = g_strdup (uri);
    
    g_free (priv->selected_path);
    priv->selected_path = g_strdup (path);
    
    g_signal_emit (emft, signals[FOLDER_SELECTED], 0, path, uri, flags);
    g_signal_emit (emft, signals[FOLDER_ACTIVATED], 0, path, uri);
}

#if 0
static void
emft_popup_view (GtkWidget *item, EMFolderTree *emft)
{

}

static void
emft_popup_open_new (GtkWidget *item, EMFolderTree *emft)
{
}
#endif


struct _EMCopyFolders {
    struct _mail_msg msg;
    
    /* input data */
    CamelStore *fromstore;
    CamelStore *tostore;
    
    char *frombase;
    char *tobase;
    
    int delete;
};

static void
emft_copy_folders__copy (struct _mail_msg *mm)
{
    struct _EMCopyFolders *m = (struct _EMCopyFolders *) mm;
    guint32 flags = CAMEL_STORE_FOLDER_INFO_FAST | CAMEL_STORE_FOLDER_INFO_RECURSIVE;
    GList *pending = NULL, *deleting = NULL, *l;
    GString *fromname, *toname;
    CamelFolderInfo *fi;
    const char *tmp;
    int fromlen;
    
    if (camel_store_supports_subscriptions (m->fromstore))
        flags |= CAMEL_STORE_FOLDER_INFO_SUBSCRIBED;
    
    if (!(fi = camel_store_get_folder_info (m->fromstore, m->frombase, flags, &mm->ex)))
        return;
    
    pending = g_list_append (pending, fi);
    
    toname = g_string_new ("");
    fromname = g_string_new ("");
    
    tmp = strrchr (m->frombase, '/');
    if (tmp == NULL)
        fromlen = 0;
    else
        fromlen = tmp - m->frombase + 1;
    
    d(printf ("top name is '%s'\n", fi->full_name));
    
    while (pending) {
        CamelFolderInfo *info = pending->data;
        
        pending = g_list_remove_link (pending, pending);
        while (info) {
            CamelFolder *fromfolder, *tofolder;
            GPtrArray *uids;
            int deleted = 0;
            
            if (info->child)
                pending = g_list_append (pending, info->child);
            
            if (m->tobase[0])
                g_string_printf (toname, "%s/%s", m->tobase, info->full_name + fromlen);
            else
                g_string_printf (toname, "%s", info->full_name + fromlen);
            
            d(printf ("Copying from '%s' to '%s'\n", info->full_name, toname->str));
            
            /* This makes sure we create the same tree, e.g. from a nonselectable source */
            /* Not sure if this is really the 'right thing', e.g. for spool stores, but it makes the ui work */
            if ((info->flags & CAMEL_FOLDER_NOSELECT) == 0) {
                d(printf ("this folder is selectable\n"));
                if (m->tostore == m->fromstore && m->delete) {
                    camel_store_rename_folder (m->fromstore, info->full_name, toname->str, &mm->ex);
                    if (camel_exception_is_set (&mm->ex))
                        goto exception;
                    
                    /* this folder no longer exists, unsubscribe it */
                    if (camel_store_supports_subscriptions (m->fromstore))
                        camel_store_unsubscribe_folder (m->fromstore, info->full_name, NULL);
                    
                    deleted = 1;
                } else {
                    if (!(fromfolder = camel_store_get_folder (m->fromstore, info->full_name, 0, &mm->ex)))
                        goto exception;
                    
                    if (!(tofolder = camel_store_get_folder (m->tostore, toname->str, CAMEL_STORE_FOLDER_CREATE, &mm->ex))) {
                        camel_object_unref (fromfolder);
                        goto exception;
                    }
                    
                    uids = camel_folder_get_uids (fromfolder);
                    camel_folder_transfer_messages_to (fromfolder, uids, tofolder, NULL, m->delete, &mm->ex);
                    camel_folder_free_uids (fromfolder, uids);
                    
                    if (m->delete)
                        camel_folder_sync(fromfolder, TRUE, NULL);
                    
                    camel_object_unref (fromfolder);
                    camel_object_unref (tofolder);
                }
            }
            
            if (camel_exception_is_set (&mm->ex))
                goto exception;
            else if (m->delete && !deleted)
                deleting = g_list_prepend (deleting, info);
            
            /* subscribe to the new folder if appropriate */
            if (camel_store_supports_subscriptions (m->tostore)
                && !camel_store_folder_subscribed (m->tostore, toname->str))
                camel_store_subscribe_folder (m->tostore, toname->str, NULL);
            
            info = info->next;
        }
    }
    
    /* delete the folders in reverse order from how we copyied them, if we are deleting any */
    l = deleting;
    while (l) {
        CamelFolderInfo *info = l->data;
        
        d(printf ("deleting folder '%s'\n", info->full_name));
        
        /* FIXME: we need to do something with the exception
           since otherwise the users sees a failed operation
           with no error message or even any warnings */
        if (camel_store_supports_subscriptions (m->fromstore))
            camel_store_unsubscribe_folder (m->fromstore, info->full_name, NULL);
        
        camel_store_delete_folder (m->fromstore, info->full_name, NULL);
        l = l->next;
    }
    
 exception:
    
    camel_store_free_folder_info (m->fromstore, fi);
    g_list_free (deleting);
    
    g_string_free (toname, TRUE);
    g_string_free (fromname, TRUE);
}

static void
emft_copy_folders__free (struct _mail_msg *mm)
{
    struct _EMCopyFolders *m = (struct _EMCopyFolders *) mm;
    
    camel_object_unref (m->fromstore);
    camel_object_unref (m->tostore);
    
    g_free (m->frombase);
    g_free (m->tobase);
}

static struct _mail_msg_op copy_folders_op = {
    NULL,
    emft_copy_folders__copy,
    NULL,
    emft_copy_folders__free,
};

static void
emft_copy_folders (CamelStore *tostore, const char *tobase, CamelStore *fromstore, const char *frombase, int delete)
{
    struct _EMCopyFolders *m;
    
    m = mail_msg_new (&copy_folders_op, NULL, sizeof (struct _EMCopyFolders));
    camel_object_ref (fromstore);
    m->fromstore = fromstore;
    camel_object_ref (tostore);
    m->tostore = tostore;
    m->frombase = g_strdup (frombase);
    m->tobase = g_strdup (tobase);
    m->delete = delete;
    
    e_thread_put (mail_thread_new, (EMsg *) m);
}

struct _copy_folder_data {
    EMFolderTree *emft;
    gboolean delete;
};

static void
emft_popup_copy_folder_selected (const char *uri, void *data)
{
    struct _copy_folder_data *cfd = data;
    struct _EMFolderTreePrivate *priv;
    CamelStore *fromstore = NULL, *tostore = NULL;
    char *tobase = NULL, *frombase;
    CamelException ex;
    CamelURL *url;

    if (uri == NULL) {
        g_free (cfd);
        return;
    }
    
    priv = cfd->emft->priv;
    
    d(printf ("%sing folder '%s' to '%s'\n", cfd->delete ? "move" : "copy", priv->selected_path, uri));
    
    camel_exception_init (&ex);
    frombase = priv->selected_path + 1;

    if (!(fromstore = camel_session_get_store (session, priv->selected_uri, &ex))) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *) cfd->emft),
                cfd->delete?"mail:no-move-folder-notexist":"mail:no-copy-folder-notexist", frombase, uri, ex.desc, NULL);
        goto fail;
    }
    
    if (cfd->delete && fromstore == mail_component_peek_local_store (NULL) && is_special_local_folder (frombase)) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *) cfd->emft),
                "mail:no-rename-special-folder", frombase, NULL);
        goto fail;
    }
    
    if (!(tostore = camel_session_get_store (session, uri, &ex))) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *) cfd->emft),
                cfd->delete?"mail:no-move-folder-to-notexist":"mail:no-move-folder-to-notexist", frombase, uri, ex.desc, NULL);
        goto fail;
    }
    
    url = camel_url_new (uri, NULL);
    if (((CamelService *)tostore)->provider->url_flags & CAMEL_URL_FRAGMENT_IS_PATH)
        tobase = url->fragment;
    else if (url->path && url->path[0])
        tobase = url->path+1;
    if (tobase == NULL)
        tobase = "";

    emft_copy_folders (tostore, tobase, fromstore, frombase, cfd->delete);
    
    camel_url_free (url);
fail:
    if (fromstore)
        camel_object_unref(fromstore);
    if (tostore)
        camel_object_unref(tostore);
    camel_exception_clear (&ex);
    g_free (cfd);
}

static void
emft_popup_copy (GtkWidget *item, EMFolderTree *emft)
{
    struct _copy_folder_data *cfd;
    
    cfd = g_malloc (sizeof (*cfd));
    cfd->emft = emft;
    cfd->delete = FALSE;
    
    em_select_folder (NULL, _("Select folder"), _("C_opy"),
              NULL, emft_popup_copy_folder_selected, cfd);
}

static void
emft_popup_move (GtkWidget *item, EMFolderTree *emft)
{
    struct _copy_folder_data *cfd;
    
    cfd = g_malloc (sizeof (*cfd));
    cfd->emft = emft;
    cfd->delete = TRUE;
    
    em_select_folder (NULL, _("Select folder"), _("_Move"),
              NULL, emft_popup_copy_folder_selected, cfd);
}


struct _EMCreateFolder {
    struct _mail_msg msg;
    
    /* input data */
    CamelStore *store;
    char *full_name;
    char *parent;
    char *name;
    
    /* output data */
    CamelFolderInfo *fi;
    
    /* callback data */
    void (* done) (CamelFolderInfo *fi, void *user_data);
    void *user_data;
};

static char *
emft_create_folder__desc (struct _mail_msg *mm, int done)
{
    struct _EMCreateFolder *m = (struct _EMCreateFolder *) mm;
    
    return g_strdup_printf (_("Creating folder `%s'"), m->full_name);
}

static void
emft_create_folder__create (struct _mail_msg *mm)
{
    struct _EMCreateFolder *m = (struct _EMCreateFolder *) mm;
    
    d(printf ("creating folder parent='%s' name='%s' full_name='%s'\n", m->parent, m->name, m->full_name));
    
    if ((m->fi = camel_store_create_folder (m->store, m->parent, m->name, &mm->ex))) {
        if (camel_store_supports_subscriptions (m->store))
            camel_store_subscribe_folder (m->store, m->full_name, &mm->ex);
    }
}

static void
emft_create_folder__created (struct _mail_msg *mm)
{
    struct _EMCreateFolder *m = (struct _EMCreateFolder *) mm;
    
    if (m->done)
        m->done (m->fi, m->user_data);
}

static void
emft_create_folder__free (struct _mail_msg *mm)
{
    struct _EMCreateFolder *m = (struct _EMCreateFolder *) mm;
    
    camel_store_free_folder_info (m->store, m->fi);
    camel_object_unref (m->store);
    g_free (m->full_name);
    g_free (m->parent);
    g_free (m->name);
}

static struct _mail_msg_op create_folder_op = {
    emft_create_folder__desc,
    emft_create_folder__create,
    emft_create_folder__created,
    emft_create_folder__free,
};


static int
emft_create_folder (CamelStore *store, const char *path, void (* done) (CamelFolderInfo *fi, void *user_data), void *user_data)
{
    const char *parent, *full_name;
    char *name, *namebuf = NULL;
    struct _EMCreateFolder *m;
    int id;
    
    full_name = path[0] == '/' ? path + 1 : path;
    namebuf = g_strdup (full_name);
    if (!(name = strrchr (namebuf, '/'))) {
        name = namebuf;
        parent = "";
    } else {
        *name++ = '\0';
        parent = namebuf;
    }
    
    m = mail_msg_new (&create_folder_op, NULL, sizeof (struct _EMCreateFolder));
    camel_object_ref (store);
    m->store = store;
    m->full_name = g_strdup (full_name);
    m->parent = g_strdup (parent);
    m->name = g_strdup (name);
    m->user_data = user_data;
    m->done = done;
    
    g_free (namebuf);
    
    id = m->msg.seq;
    e_thread_put (mail_thread_new, (EMsg *) m);
    
    return id;
}

static void
created_cb (CamelFolderInfo *fi, void *user_data)
{
    gboolean *created = user_data;
    
    *created = fi ? TRUE : FALSE;
}

gboolean
em_folder_tree_create_folder (EMFolderTree *emft, const char *path, const char *uri)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    struct _EMFolderTreeModelStoreInfo *si;
    gboolean created = FALSE;
    CamelStore *store;
    CamelException ex;
    
    d(printf ("Creating folder: %s (%s)\n", path, uri));
    
    camel_exception_init (&ex);
    if (!(store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, &ex))) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                "mail:no-create-folder-nostore", path, ex.desc, NULL);
        goto fail;
    }
    
    if (!(si = g_hash_table_lookup (priv->model->store_hash, store))) {
        abort();
        camel_object_unref (store);
        goto fail;
    }
    
    camel_object_unref (store);
    
    mail_msg_wait (emft_create_folder (si->store, path, created_cb, &created));
fail:
    camel_exception_clear(&ex);
    
    return created;
}

static void
new_folder_created_cb (CamelFolderInfo *fi, void *user_data)
{
    EMFolderSelector *emfs = user_data;
    
    if (fi)
        gtk_widget_destroy ((GtkWidget *) emfs);
    
    g_object_unref (emfs);
}

static void
emft_popup_new_folder_response (EMFolderSelector *emfs, int response, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    struct _EMFolderTreeModelStoreInfo *si;
    const char *uri, *path;
    CamelException ex;
    CamelStore *store;
    
    if (response != GTK_RESPONSE_OK) {
        gtk_widget_destroy ((GtkWidget *) emfs);
        return;
    }
    
    uri = em_folder_selector_get_selected_uri (emfs);
    path = em_folder_selector_get_selected_path (emfs);
    
    d(printf ("Creating new folder: %s (%s)\n", path, uri));
    
    camel_exception_init (&ex);
    if (!(store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, &ex))) {
        camel_exception_clear (&ex);
        return;
    }
    
    if (!(si = g_hash_table_lookup (priv->model->store_hash, store))) {
        g_assert_not_reached ();
        camel_object_unref (store);
        return;
    }

    /* HACK: we need to create vfolders using the vfolder editor */
    if (CAMEL_IS_VEE_STORE(store)) {
        VfolderRule *rule;

        rule = vfolder_rule_new();
        filter_rule_set_name((FilterRule *)rule, path);
        vfolder_gui_add_rule(rule);
    } else {
        g_object_ref (emfs);
        emft_create_folder (si->store, path, new_folder_created_cb, emfs);
    }

    camel_object_unref (store);
}

static void
emft_popup_new_folder (GtkWidget *item, EMFolderTree *emft)
{
    EMFolderTree *folder_tree;
    GtkWidget *dialog;
    
    folder_tree = (EMFolderTree *) em_folder_tree_new_with_model (emft->priv->model);
    
    dialog = em_folder_selector_create_new (folder_tree, 0, _("Create folder"), _("Specify where to create the folder:"));
    em_folder_selector_set_selected ((EMFolderSelector *) dialog, emft->priv->selected_uri);
    g_signal_connect (dialog, "response", G_CALLBACK (emft_popup_new_folder_response), emft);
    gtk_widget_show (dialog);
}

static void
emft_popup_delete_rec (CamelStore *store, CamelFolderInfo *fi, CamelException *ex)
{
    while (fi) {
        CamelFolder *folder;
        
        if (fi->child) {
            emft_popup_delete_rec (store, fi->child, ex);
            if (camel_exception_is_set (ex))
                return;
        }
        
        d(printf ("deleting folder '%s'\n", fi->full_name));
        
        /* shouldn't camel do this itself? */
        if (camel_store_supports_subscriptions (store))
            camel_store_unsubscribe_folder (store, fi->full_name, NULL);
        
        if (!(folder = camel_store_get_folder (store, fi->full_name, 0, ex)))
            return;
        
        if (!CAMEL_IS_VEE_FOLDER (folder)) {
            GPtrArray *uids = camel_folder_get_uids (folder);
            int i;
            
            camel_folder_freeze (folder);
            for (i = 0; i < uids->len; i++)
                camel_folder_delete_message (folder, uids->pdata[i]);
            
            camel_folder_free_uids (folder, uids);
            
            camel_folder_sync (folder, TRUE, NULL);
            camel_folder_thaw (folder);
        }
        
        camel_store_delete_folder (store, fi->full_name, ex);
        if (camel_exception_is_set (ex))
            return;
        
        fi = fi->next;
    }
}

static void
emft_popup_delete_folders (CamelStore *store, const char *path, CamelException *ex)
{
    guint32 flags = CAMEL_STORE_FOLDER_INFO_RECURSIVE | CAMEL_STORE_FOLDER_INFO_FAST;
    const char *full_name;
    CamelFolderInfo *fi;
    
    if (camel_store_supports_subscriptions (store))
        flags |= CAMEL_STORE_FOLDER_INFO_SUBSCRIBED;
    
    full_name = path[0] == '/' ? path + 1 : path;
    fi = camel_store_get_folder_info (store, full_name, flags, ex);
    if (camel_exception_is_set (ex))
        return;
    
    emft_popup_delete_rec (store, fi, ex);
    camel_store_free_folder_info (store, fi);
}

static void
selfunc (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
{
    struct _emft_selection_data *dat = (struct _emft_selection_data *) data;
    
    dat->model = model;
    if (!dat->set)
        *(dat->iter) = *iter;
    dat->set = TRUE;
}

static gboolean
emft_selection_get_selected (GtkTreeSelection *selection, GtkTreeModel **model, GtkTreeIter *iter)
{
    struct _emft_selection_data dat = { NULL, iter, FALSE };
    
    if (gtk_tree_selection_get_mode (selection) == GTK_SELECTION_MULTIPLE) {
        gtk_tree_selection_selected_foreach (selection, selfunc, &dat);
        if (model)
            *model = dat.model;
        return dat.set;
    } else {
        return gtk_tree_selection_get_selected (selection, model, iter);
    }
}

static void
emft_popup_delete_response (GtkWidget *dialog, guint response, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    CamelStore *store;
    CamelException ex;
    GtkTreeIter iter;
    char *path;
    
    gtk_widget_destroy (dialog);
    if (response != GTK_RESPONSE_OK)
        return;
    
    selection = gtk_tree_view_get_selection (priv->treeview);
    if (!emft_selection_get_selected (selection, &model, &iter))
        return;
    
    gtk_tree_model_get (model, &iter, COL_STRING_FOLDER_PATH, &path,
                COL_POINTER_CAMEL_STORE, &store, -1);
    
    camel_exception_init (&ex);
    emft_popup_delete_folders (store, path, &ex);
    if (camel_exception_is_set (&ex)) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                "mail:no-delete-folder", path, ex.desc, NULL);
        camel_exception_clear (&ex);
    }
}

static void
emft_popup_delete_folder (GtkWidget *item, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeSelection *selection;
    CamelStore *local, *store;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkWidget *dialog;
    const char *full_name;
    char *path;
    
    selection = gtk_tree_view_get_selection (priv->treeview);
    if (!emft_selection_get_selected (selection, &model, &iter))
        return;
    
    gtk_tree_model_get (model, &iter, COL_POINTER_CAMEL_STORE, &store, COL_STRING_FOLDER_PATH, &path, -1);
    
    local = mail_component_peek_local_store (NULL);
    
    full_name = path[0] == '/' ? path + 1 : path;
    if (store == local && is_special_local_folder (full_name)) {
        e_error_run(NULL, "mail:no-delete-spethal-folder", full_name, NULL);
        return;
    }

    dialog = e_error_new((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                 "mail:ask-delete-folder", full_name, NULL);
    g_signal_connect (dialog, "response", G_CALLBACK (emft_popup_delete_response), emft);
    gtk_widget_show (dialog);
}

static void
emft_popup_rename_folder (GtkWidget *item, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    char *prompt, *folder_path, *name, *new_name, *uri;
    GtkTreeSelection *selection;
    const char *full_name, *p;
    CamelStore *local, *store;
    gboolean done = FALSE;
    GtkTreeModel *model;
    GtkTreeIter iter;
    size_t base_len;
    
    local = mail_component_peek_local_store (NULL);
    
    selection = gtk_tree_view_get_selection (priv->treeview);
    if (!emft_selection_get_selected (selection, &model, &iter))
        return;
    
    gtk_tree_model_get (model, &iter, COL_STRING_FOLDER_PATH, &folder_path,
                COL_STRING_DISPLAY_NAME, &name,
                COL_POINTER_CAMEL_STORE, &store,
                COL_STRING_URI, &uri, -1);
    
    full_name = folder_path[0] == '/' ? folder_path + 1 : folder_path;
    
    /* don't allow user to rename one of the special local folders */
    if (store == local && is_special_local_folder (full_name)) {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                "mail:no-rename-spethal-folder", full_name, NULL);
        return;
    }
    
    if ((p = strrchr (full_name, '/')))
        base_len = (size_t) (p - full_name);
    else
        base_len = 0;
    
    prompt = g_strdup_printf (_("Rename the \"%s\" folder to:"), name);
    while (!done) {
        new_name = e_request_string (NULL, _("Rename Folder"), prompt, name);
        if (new_name == NULL || !strcmp (name, new_name)) {
            /* old name == new name */
            done = TRUE;
        } else {
            CamelFolderInfo *fi;
            CamelException ex;
            char *path, *p;
            
            if (base_len > 0) {
                path = g_malloc (base_len + strlen (new_name) + 2);
                memcpy (path, full_name, base_len);
                p = path + base_len;
                *p++ = '/';
                strcpy (p, new_name);
            } else {
                path = g_strdup (new_name);
            }
            
            camel_exception_init (&ex);
            if ((fi = camel_store_get_folder_info (store, path, CAMEL_STORE_FOLDER_INFO_FAST, &ex)) != NULL) {
                camel_store_free_folder_info (store, fi);
                e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                        "mail:no-rename-folder-exists", name, new_name, NULL);
            } else {
                const char *oldpath, *newpath;
                
                oldpath = full_name;
                newpath = path;
                
                d(printf ("renaming %s to %s\n", oldpath, newpath));
                
                camel_exception_clear (&ex);
                camel_store_rename_folder (store, oldpath, newpath, &ex);
                if (camel_exception_is_set (&ex)) {
                    e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)emft),
                            "mail:no-rename-folder", oldpath, newpath, ex.desc, NULL);
                    camel_exception_clear (&ex);
                }
                
                done = TRUE;
            }
            
            g_free (path);
        }
        
        g_free (new_name);
    }
}


static void
emft_popup_properties (GtkWidget *item, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;
    char *uri;
    
    selection = gtk_tree_view_get_selection (priv->treeview);
    if (!emft_selection_get_selected (selection, &model, &iter))
        return;
    
    gtk_tree_model_get (model, &iter, COL_STRING_URI, &uri, -1);

    em_folder_properties_show(NULL, NULL, uri);
}

static EMPopupItem emft_popup_menu[] = {
#if 0
    { EM_POPUP_ITEM, "00.emc.00", N_("_View"), G_CALLBACK (emft_popup_view), NULL, NULL, EM_POPUP_FOLDER_SELECT },
    { EM_POPUP_ITEM, "00.emc.01", N_("Open in _New Window"), G_CALLBACK (emft_popup_open_new), NULL, NULL, EM_POPUP_FOLDER_SELECT },

    { EM_POPUP_BAR, "10.emc" },
#endif
    { EM_POPUP_ITEM, "10.emc.00", N_("_Copy"), G_CALLBACK (emft_popup_copy), NULL, "stock_folder-copy", EM_POPUP_FOLDER_FOLDER|EM_POPUP_FOLDER_SELECT },
    { EM_POPUP_ITEM, "10.emc.01", N_("_Move"), G_CALLBACK (emft_popup_move), NULL, "stock_folder-move", EM_POPUP_FOLDER_FOLDER|EM_POPUP_FOLDER_DELETE },
    
    { EM_POPUP_BAR, "20.emc" },
    /* FIXME: need to disable for nochildren folders */
    { EM_POPUP_ITEM, "20.emc.00", N_("_New Folder..."), G_CALLBACK (emft_popup_new_folder), NULL, "stock_folder", EM_POPUP_FOLDER_INFERIORS },
    /* FIXME: need to disable for undeletable folders */
    { EM_POPUP_ITEM, "20.emc.01", N_("_Delete"), G_CALLBACK (emft_popup_delete_folder), NULL, "stock_delete", EM_POPUP_FOLDER_FOLDER|EM_POPUP_FOLDER_DELETE },
    { EM_POPUP_ITEM, "20.emc.01", N_("_Rename"), G_CALLBACK (emft_popup_rename_folder), NULL, NULL, EM_POPUP_FOLDER_FOLDER|EM_POPUP_FOLDER_DELETE },
    
    { EM_POPUP_BAR, "80.emc" },
    { EM_POPUP_ITEM, "80.emc.00", N_("_Properties..."), G_CALLBACK (emft_popup_properties), NULL, "stock_folder-properties", EM_POPUP_FOLDER_FOLDER|EM_POPUP_FOLDER_SELECT }
};

static gboolean
emft_tree_button_press (GtkTreeView *treeview, GdkEventButton *event, EMFolderTree *emft)
{
    GtkTreeSelection *selection;
    CamelStore *local, *store;
    const char *folder_name;
    EMPopupTarget *target;
    GtkTreePath *tree_path;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GSList *menus = NULL;
    guint32 info_flags = 0;
    guint32 flags = 0;
    gboolean isstore;
    char *uri, *path;
    GtkMenu *menu;
    EMPopup *emp;
    int i;
    
    if (event->button != 3 && !(event->button == 1 && event->type == GDK_2BUTTON_PRESS))
        return FALSE;
    
    if (!gtk_tree_view_get_path_at_pos (treeview, (int) event->x, (int) event->y, &tree_path, NULL, NULL, NULL))
        return FALSE;
    
    /* select/focus the row that was right-clicked or double-clicked */
    gtk_tree_view_set_cursor (treeview, tree_path, NULL, FALSE);
    
    if (event->button == 1 && event->type == GDK_2BUTTON_PRESS) {
        emft_tree_row_activated (treeview, tree_path, NULL, emft);
        gtk_tree_path_free (tree_path);
        return TRUE;
    }
    
    gtk_tree_path_free (tree_path);
    
    /* FIXME: we really need the folderinfo to build a proper menu */
    selection = gtk_tree_view_get_selection (treeview);
    if (!emft_selection_get_selected (selection, &model, &iter))
        return FALSE;
    
    gtk_tree_model_get (model, &iter, COL_POINTER_CAMEL_STORE, &store,
                COL_STRING_URI, &uri, COL_STRING_FOLDER_PATH, &path,
                COL_BOOL_IS_STORE, &isstore, -1);
    
    if (path == NULL)
        return FALSE;
    
    if (isstore)
        flags |= EM_POPUP_FOLDER_STORE;
    else
        flags |= EM_POPUP_FOLDER_FOLDER;
    
    local = mail_component_peek_local_store (NULL);
    
    folder_name = path[0] == '/' ? path + 1 : path;
    
    /* don't allow deletion of special local folders */
    if (!(store == local && is_special_local_folder (folder_name)))
        flags |= EM_POPUP_FOLDER_DELETE;
    
    /* hack for vTrash/vJunk */
    if (!strcmp (folder_name, CAMEL_VTRASH_NAME) || !strcmp (folder_name, CAMEL_VJUNK_NAME))
        info_flags |= CAMEL_FOLDER_VIRTUAL | CAMEL_FOLDER_NOINFERIORS;
    
    /* handle right-click by opening a context menu */
    emp = em_popup_new ("com.ximian.mail.storageset.popup.select");
    
    /* FIXME: pass valid fi->flags here */
    target = em_popup_target_new_folder (uri, info_flags, flags);
    
    for (i = 0; i < sizeof (emft_popup_menu) / sizeof (emft_popup_menu[0]); i++) {
        EMPopupItem *item = &emft_popup_menu[i];
        
        item->activate_data = emft;
        menus = g_slist_prepend (menus, item);
    }
    
    em_popup_add_items (emp, menus, (GDestroyNotify) g_slist_free);

    menu = em_popup_create_menu_once (emp, target, 0, target->mask);
    
    if (event == NULL || event->type == GDK_KEY_PRESS) {
        /* FIXME: menu pos function */
        gtk_menu_popup (menu, NULL, NULL, NULL, NULL, 0, event->time);
    } else {
        gtk_menu_popup (menu, NULL, NULL, NULL, NULL, event->button, event->time);
    }
    
    return TRUE;
}


static void
emft_tree_selection_changed (GtkTreeSelection *selection, EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    GtkTreeModel *model;
    GtkTreeIter iter;
    char *path, *uri;
    guint32 flags;
    
    if (!emft_selection_get_selected (selection, &model, &iter))
        return;
    
    gtk_tree_model_get (model, &iter, COL_STRING_FOLDER_PATH, &path,
                COL_STRING_URI, &uri, COL_UINT_FLAGS, &flags, -1);
    
    g_free (priv->selected_uri);
    priv->selected_uri = g_strdup (uri);
    
    g_free (priv->selected_path);
    priv->selected_path = g_strdup (path);
    
    g_signal_emit (emft, signals[FOLDER_SELECTED], 0, path, uri, flags);
}


void
em_folder_tree_set_selected (EMFolderTree *emft, const char *uri)
{
    struct _EMFolderTreeModelStoreInfo *si;
    struct _EMFolderTreeGetFolderInfo *m;
    struct _EMFolderTreePrivate *priv;
    GtkTreeRowReference *row = NULL;
    GtkTreeSelection *selection;
    GtkTreePath *tree_path;
    CamelStore *store;
    CamelException ex;
    const char *top;
    char *path, *p;
    CamelURL *url;
    
    g_return_if_fail (EM_IS_FOLDER_TREE (emft));
    
    priv = emft->priv;
    
    camel_exception_init (&ex);
    if (!(store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, &ex))) {
        camel_exception_clear (&ex);
        return;
    }
    
    if (!(si = g_hash_table_lookup (priv->model->store_hash, store))) {
        camel_object_unref (store);
        return;
    }
    
    if (!(url = camel_url_new (uri, NULL))) {
        camel_object_unref (store);
        return;
    }
    
    if (((CamelService *) store)->provider->url_flags & CAMEL_URL_FRAGMENT_IS_PATH)
        path = g_strdup_printf ("/%s", url->fragment ? url->fragment : "");
    else
        path = g_strdup (url->path ? url->path : "/");
    
    top = path[0] == '/' ? path + 1 : path;
    camel_url_free (url);
    
    if (!strcmp (path, "/"))
        row = si->row;
    
    if (row || (row = g_hash_table_lookup (si->path_hash, path))) {
        /* the folder-info node has already been loaded */
        tree_path = gtk_tree_row_reference_get_path (row);
        gtk_tree_view_expand_to_path (priv->treeview, tree_path);
        selection = gtk_tree_view_get_selection (priv->treeview);
        gtk_tree_selection_select_path (selection, tree_path);
        gtk_tree_view_set_cursor(priv->treeview, tree_path, NULL, FALSE);
        gtk_tree_path_free (tree_path);
        camel_object_unref (store);
        g_free (path);
        return;
    }
    
    /* look for the first of our parent folders that has already been loaded */
    p = path + strlen (path);
    while (p > path) {
        if (*p == '/') {
            *p = '\0';
            
            if ((row = g_hash_table_lookup (si->path_hash, path)))
                break;
        }
        
        p--;
    }
    
    if (row == NULL) {
        /* none of the folders of the desired store have been loaded yet */
        row = si->row;
        top = NULL;
    }
    
    /* FIXME: this gets all the subfolders of our first loaded
     * parent folder - ideally we'd only get what we needed, but
     * it's probably not worth the effort */
    m = mail_msg_new (&get_folder_info_op, NULL, sizeof (struct _EMFolderTreeGetFolderInfo));
    m->root = gtk_tree_row_reference_copy (row);
    m->store = store;
    m->emft = emft;
    g_object_ref(emft);
    m->top = top ? g_strdup (top) : NULL;
    m->flags = CAMEL_STORE_FOLDER_INFO_FAST | CAMEL_STORE_FOLDER_INFO_RECURSIVE;
    m->select_uri = g_strdup (uri);
    
    g_free (path);
    
    e_thread_put (mail_thread_new, (EMsg *) m);
}


const char *
em_folder_tree_get_selected_uri (EMFolderTree *emft)
{
    g_return_val_if_fail (EM_IS_FOLDER_TREE (emft), NULL);
    
    return emft->priv->selected_uri;
}


const char *
em_folder_tree_get_selected_path (EMFolderTree *emft)
{
    g_return_val_if_fail (EM_IS_FOLDER_TREE (emft), NULL);
    
    return emft->priv->selected_path;
}


EMFolderTreeModel *
em_folder_tree_get_model (EMFolderTree *emft)
{
    g_return_val_if_fail (EM_IS_FOLDER_TREE (emft), NULL);
    
    return emft->priv->model;
}


static gboolean
emft_save_state (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    em_folder_tree_model_save_expanded (priv->model);
    priv->save_state_id = 0;
    
    return FALSE;
}


static void
emft_queue_save_state (EMFolderTree *emft)
{
    struct _EMFolderTreePrivate *priv = emft->priv;
    
    if (priv->save_state_id != 0)
        return;
    
    priv->save_state_id = g_timeout_add (1000, (GSourceFunc) emft_save_state, emft);
}