path: root/modules/mail/e-mail-shell-backend.c

/*
 * e-mail-shell-backend.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-mail-shell-backend.h"

#include <glib/gi18n.h>

#include "e-util/e-import.h"
#include "e-util/e-util.h"
#include "shell/e-shell.h"
#include "shell/e-shell-window.h"
#include "composer/e-msg-composer.h"
#include "widgets/misc/e-preferences-window.h"
#include "widgets/misc/e-web-view.h"

#include "e-mail-shell-settings.h"
#include "e-mail-shell-sidebar.h"
#include "e-mail-shell-view.h"

#include "e-mail-browser.h"
#include "e-mail-reader.h"
#include "e-mail-session.h"
#include "e-mail-store.h"
#include "em-account-editor.h"
#include "em-account-prefs.h"
#include "em-composer-prefs.h"
#include "em-composer-utils.h"
#include "em-folder-utils.h"
#include "em-format-hook.h"
#include "em-format-html-display.h"
#include "em-mailer-prefs.h"
#include "em-network-prefs.h"
#include "em-utils.h"
#include "mail-config.h"
#include "mail-ops.h"
#include "mail-send-recv.h"
#include "mail-vfolder.h"
#include "importers/mail-importer.h"

#define BACKEND_NAME "mail"

struct _EMailShellBackendPrivate {
    gint mail_sync_in_progress;
    guint mail_sync_source_id;
};

static gpointer parent_class;
static GType mail_shell_backend_type;

static void mbox_create_preview_cb (GObject *preview, GtkWidget **preview_widget);
static void mbox_fill_preview_cb (GObject *preview, CamelMimeMessage *msg);

static void
mail_shell_backend_init_importers (void)
{
    EImportClass *import_class;
    EImportImporter *importer;

    import_class = g_type_class_ref (e_import_get_type ());

    importer = mbox_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);
    mbox_importer_set_preview_funcs (mbox_create_preview_cb, mbox_fill_preview_cb);

    importer = elm_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);

    importer = pine_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);
}

static void
mail_shell_backend_mail_icon_cb (EShellWindow *shell_window,
                                 const gchar *icon_name)
{
    GtkAction *action;

    action = e_shell_window_get_shell_view_action (
        shell_window, BACKEND_NAME);
    g_object_set (action, "icon-name", icon_name, NULL);
}

static void
action_mail_folder_new_cb (GtkAction *action,
                           EShellWindow *shell_window)
{
    EMFolderTree *folder_tree = NULL;
    EMailShellSidebar *mail_shell_sidebar;
    EMailSession *mail_session;
    EShellSidebar *shell_sidebar;
    EShellView *shell_view;
    const gchar *view_name;

    /* Take care not to unnecessarily load the mail shell view. */
    view_name = e_shell_window_get_active_view (shell_window);
    if (g_strcmp0 (view_name, BACKEND_NAME) != 0) {
        EShellBackend *mail_backend;
        EShell *shell;

        shell = e_shell_window_get_shell (shell_window);

        mail_backend =
            e_shell_get_backend_by_name (shell, BACKEND_NAME);
        g_return_if_fail (mail_backend != NULL);

        mail_session =
            e_mail_backend_get_session (
            E_MAIL_BACKEND (mail_backend));
        g_return_if_fail (mail_session != NULL);

        goto exit;
    }

    shell_view = e_shell_window_get_shell_view (shell_window, view_name);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    mail_shell_sidebar = E_MAIL_SHELL_SIDEBAR (shell_sidebar);
    folder_tree = e_mail_shell_sidebar_get_folder_tree (mail_shell_sidebar);
    mail_session = em_folder_tree_get_session (folder_tree);

exit:
    em_folder_utils_create_folder (
        NULL, folder_tree, mail_session, GTK_WINDOW (shell_window));
}

static void
action_mail_message_new_cb (GtkAction *action,
                            EShellWindow *shell_window)
{
    EMailShellSidebar *mail_shell_sidebar;
    EShellSidebar *shell_sidebar;
    EShellView *shell_view;
    EShell *shell;
    EMFolderTree *folder_tree;
    const gchar *view_name;
    gchar *uri = NULL;

    shell = e_shell_window_get_shell (shell_window);

    if (!em_utils_check_user_can_send_mail ())
        return;

    /* Take care not to unnecessarily load the mail shell view. */
    view_name = e_shell_window_get_active_view (shell_window);
    if (g_strcmp0 (view_name, BACKEND_NAME) != 0)
        goto exit;

    shell_view = e_shell_window_get_shell_view (shell_window, view_name);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    mail_shell_sidebar = E_MAIL_SHELL_SIDEBAR (shell_sidebar);
    folder_tree = e_mail_shell_sidebar_get_folder_tree (mail_shell_sidebar);
    uri = em_folder_tree_get_selected_uri (folder_tree);

exit:
    em_utils_compose_new_message (shell, uri);

    g_free (uri);
}

static GtkActionEntry item_entries[] = {

    { "mail-message-new",
      "mail-message-new",
      NC_("New", "_Mail Message"),
      "<Shift><Control>m",
      N_("Compose a new mail message"),
      G_CALLBACK (action_mail_message_new_cb) }
};

static GtkActionEntry source_entries[] = {

    { "mail-folder-new",
      "folder-new",
      NC_("New", "Mail _Folder"),
      NULL,
      N_("Create a new mail folder"),
      G_CALLBACK (action_mail_folder_new_cb) }
};

static void
mail_shell_backend_sync_store_done_cb (CamelStore *store,
                                       gpointer user_data)
{
    EMailShellBackend *mail_shell_backend = user_data;

    mail_shell_backend->priv->mail_sync_in_progress--;
}

static void
mail_shell_backend_sync_store_cb (CamelStore *store,
                                  const gchar *display_name,
                                  EMailShellBackend *mail_shell_backend)
{
    mail_shell_backend->priv->mail_sync_in_progress++;

    mail_sync_store (
        store, FALSE,
        mail_shell_backend_sync_store_done_cb,
        mail_shell_backend);
}

static gboolean
mail_shell_backend_mail_sync (EMailShellBackend *mail_shell_backend)
{
    EShell *shell;
    EShellBackend *shell_backend;

    shell_backend = E_SHELL_BACKEND (mail_shell_backend);
    shell = e_shell_backend_get_shell (shell_backend);

    /* Obviously we can only sync in online mode. */
    if (!e_shell_get_online (shell))
        goto exit;

    /* If a sync is still in progress, skip this round. */
    if (mail_shell_backend->priv->mail_sync_in_progress)
        goto exit;

    e_mail_store_foreach (
        (GHFunc) mail_shell_backend_sync_store_cb,
        mail_shell_backend);

exit:
    return TRUE;
}

static void
mail_shell_backend_handle_email_uri_cb (gchar *folder_uri,
                                        CamelFolder *folder,
                                        gpointer user_data)
{
    EShellBackend *shell_backend = user_data;
    EShellSettings *shell_settings;
    EMailBackend *backend;
    CamelURL *url = user_data;
    EShell *shell;
    const gchar *forward;
    const gchar *reply;
    const gchar *uid;

    backend = E_MAIL_BACKEND (shell_backend);
    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

    if (folder == NULL) {
        g_warning ("Could not open folder '%s'", folder_uri);
        goto exit;
    }

    forward = camel_url_get_param (url, "forward");
    reply = camel_url_get_param (url, "reply");
    uid = camel_url_get_param (url, "uid");

    if (reply != NULL) {
        EMailReplyType reply_type;
        EMailReplyStyle reply_style;

        if (g_strcmp0 (reply, "all") == 0)
            reply_type = E_MAIL_REPLY_TO_ALL;
        else if (g_strcmp0 (reply, "list") == 0)
            reply_type = E_MAIL_REPLY_TO_LIST;
        else
            reply_type = E_MAIL_REPLY_TO_SENDER;

        reply_style = e_shell_settings_get_int (
            shell_settings, "mail-reply-style");

        em_utils_reply_to_message (
            shell, folder, uid, NULL,
            reply_type, reply_style, NULL);

    } else if (forward != NULL) {
        EMailForwardStyle forward_style;
        GPtrArray *uids;

        uids = g_ptr_array_new ();
        g_ptr_array_add (uids, g_strdup (uid));

        if (g_strcmp0 (forward, "attached") == 0)
            forward_style = E_MAIL_FORWARD_STYLE_ATTACHED;
        else if (g_strcmp0 (forward, "inline") == 0)
            forward_style = E_MAIL_FORWARD_STYLE_INLINE;
        else if (g_strcmp0 (forward, "quoted") == 0)
            forward_style = E_MAIL_FORWARD_STYLE_QUOTED;
        else
            forward_style = e_shell_settings_get_int (
                shell_settings, "mail-forward-style");

        em_utils_forward_messages (
            shell, folder, uids, folder_uri, forward_style);

    } else {
        GtkWidget *browser;

        /* FIXME Should pass in the shell module. */
        browser = e_mail_browser_new (backend);
        e_mail_reader_set_folder (
            E_MAIL_READER (browser), folder, folder_uri);
        e_mail_reader_set_message (E_MAIL_READER (browser), uid);
        gtk_widget_show (browser);
    }

exit:
    camel_url_free (url);
}

static gboolean
mail_shell_backend_handle_uri_cb (EShell *shell,
                                  const gchar *uri,
                                  EMailShellBackend *mail_shell_backend)
{
    EMailBackend *backend;
    EMailSession *session;
    gboolean handled = TRUE;

    backend = E_MAIL_BACKEND (mail_shell_backend);
    session = e_mail_backend_get_session (backend);

    if (g_str_has_prefix (uri, "mailto:")) {
        if (em_utils_check_user_can_send_mail ())
            em_utils_compose_new_message_with_mailto (
                shell, uri, NULL);

    } else if (g_str_has_prefix (uri, "email:")) {
        CamelURL *url;

        url = camel_url_new (uri, NULL);
        if (camel_url_get_param (url, "uid") != NULL) {
            gchar *curi = em_uri_to_camel (uri);

            mail_get_folder (
                session, curi, 0,
                mail_shell_backend_handle_email_uri_cb,
                mail_shell_backend, mail_msg_unordered_push);
            g_free (curi);

        } else {
            g_warning ("Email URI's must include a uid parameter");
            camel_url_free (url);
        }
    } else
        handled = FALSE;

    return handled;
}

static void
mail_shell_backend_prepare_for_quit_cb (EShell *shell,
                                        EActivity *activity,
                                        EShellBackend *shell_backend)
{
    EMailShellBackendPrivate *priv;

    priv = E_MAIL_SHELL_BACKEND (shell_backend)->priv;

    /* Prevent a sync from starting while trying to shutdown. */
    if (priv->mail_sync_source_id > 0) {
        g_source_remove (priv->mail_sync_source_id);
        priv->mail_sync_source_id = 0;
    }
}

static void
mail_shell_backend_window_weak_notify_cb (EShell *shell,
                                          GObject *where_the_object_was)
{
    g_signal_handlers_disconnect_by_func (
        shell, mail_shell_backend_mail_icon_cb,
        where_the_object_was);
}

static void
mail_shell_backend_window_created_cb (EShell *shell,
                                      GtkWindow *window,
                                      EShellBackend *shell_backend)
{
    const gchar *backend_name;

    /* This applies to both the composer and signature editor. */
    if (GTKHTML_IS_EDITOR (window)) {
        EShellSettings *shell_settings;
        GList *spell_languages;
        gboolean active = TRUE;

        spell_languages = e_load_spell_languages ();
        gtkhtml_editor_set_spell_languages (
            GTKHTML_EDITOR (window), spell_languages);
        g_list_free (spell_languages);

        shell_settings = e_shell_get_shell_settings (shell);

        /* Express mode does not honor this setting. */
        if (!e_shell_get_express_mode (shell))
            active = e_shell_settings_get_boolean (
                shell_settings, "composer-format-html");

        gtkhtml_editor_set_html_mode (GTKHTML_EDITOR (window), active);
    }

    if (E_IS_MSG_COMPOSER (window)) {
        /* Integrate the new composer into the mail module. */
        em_configure_new_composer (E_MSG_COMPOSER (window));
        return;
    }

    if (!E_IS_SHELL_WINDOW (window))
        return;

    backend_name = E_SHELL_BACKEND_GET_CLASS (shell_backend)->name;

    e_shell_window_register_new_item_actions (
        E_SHELL_WINDOW (window), backend_name,
        item_entries, G_N_ELEMENTS (item_entries));

    e_shell_window_register_new_source_actions (
        E_SHELL_WINDOW (window), backend_name,
        source_entries, G_N_ELEMENTS (source_entries));

    g_signal_connect_swapped (
        shell, "event::mail-icon",
        G_CALLBACK (mail_shell_backend_mail_icon_cb), window);

    g_object_weak_ref (
        G_OBJECT (window), (GWeakNotify)
        mail_shell_backend_window_weak_notify_cb, shell);
}

static void
mail_shell_backend_constructed (GObject *object)
{
    EShell *shell;
    EShellBackend *shell_backend;
    GtkWidget *preferences_window;

    shell_backend = E_SHELL_BACKEND (object);
    shell = e_shell_backend_get_shell (shell_backend);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (parent_class)->constructed (object);

    /* Register format types for EMFormatHook. */
    em_format_hook_register_type (em_format_get_type ());
    em_format_hook_register_type (em_format_html_get_type ());
    em_format_hook_register_type (em_format_html_display_get_type ());

    /* Register plugin hook types. */
    em_format_hook_get_type ();

    mail_shell_backend_init_importers ();

    g_signal_connect (
        shell, "handle-uri",
        G_CALLBACK (mail_shell_backend_handle_uri_cb),
        shell_backend);

    g_signal_connect (
        shell, "prepare-for-quit",
        G_CALLBACK (mail_shell_backend_prepare_for_quit_cb),
        shell_backend);

    g_signal_connect (
        shell, "window-created",
        G_CALLBACK (mail_shell_backend_window_created_cb),
        shell_backend);

    e_mail_shell_settings_init (shell_backend);

    /* Setup preference widget factories */
    preferences_window = e_shell_get_preferences_window (shell);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "mail-accounts",
        "preferences-mail-accounts",
        _("Mail Accounts"),
        em_account_prefs_new,
        100);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "mail",
        "preferences-mail",
        _("Mail Preferences"),
        em_mailer_prefs_new,
        300);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "composer",
        "preferences-composer",
        _("Composer Preferences"),
        em_composer_prefs_new,
        400);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "system-network-proxy",
        "preferences-system-network-proxy",
        _("Network Preferences"),
        em_network_prefs_new,
        500);
}

static void
mail_shell_backend_start (EShellBackend *shell_backend)
{
    EMailShellBackendPrivate *priv;
    EShell *shell;
    EShellSettings *shell_settings;
    EMailBackend *backend;
    EMailSession *session;
    gboolean enable_search_folders;
    const gchar *data_dir;

    priv = E_MAIL_SHELL_BACKEND (shell_backend)->priv;

    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

    backend = E_MAIL_BACKEND (shell_backend);
    session = e_mail_backend_get_session (backend);
    data_dir = e_shell_backend_get_data_dir (shell_backend);

    e_mail_store_init (session, data_dir);

    enable_search_folders = e_shell_settings_get_boolean (
        shell_settings, "mail-enable-search-folders");
    if (enable_search_folders)
        vfolder_load_storage (backend);

    mail_autoreceive_init (backend);

    if (g_getenv ("CAMEL_FLUSH_CHANGES") != NULL)
        priv->mail_sync_source_id = g_timeout_add_seconds (
            mail_config_get_sync_timeout (),
            (GSourceFunc) mail_shell_backend_mail_sync,
            shell_backend);
}

static gboolean
mail_shell_backend_delete_junk_policy_decision (EMailBackend *backend)
{
    EShell *shell;
    EShellSettings *shell_settings;
    GConfClient *client;
    const gchar *key;
    gboolean delete_junk;
    gint empty_date;
    gint empty_days;
    gint now;
    GError *error = NULL;

    shell = e_shell_backend_get_shell (E_SHELL_BACKEND (backend));

    client = e_shell_get_gconf_client (shell);
    shell_settings = e_shell_get_shell_settings (shell);

    now = time (NULL) / 60 / 60 / 24;

    delete_junk = e_shell_settings_get_boolean (
        shell_settings, "mail-empty-junk-on-exit");

    /* XXX No EShellSettings properties for these keys. */

    empty_date = empty_days = 0;

    if (delete_junk) {
        key = "/apps/evolution/mail/junk/empty_on_exit_days";
        empty_days = gconf_client_get_int (client, key, &error);
        if (error != NULL) {
            g_warning ("%s", error->message);
            g_error_free (error);
            return FALSE;
        }
    }

    if (delete_junk) {
        key = "/apps/evolution/mail/junk/empty_date";
        empty_date = gconf_client_get_int (client, key, &error);
        if (error != NULL) {
            g_warning ("%s", error->message);
            g_error_free (error);
            return FALSE;
        }
    }

    delete_junk &= (empty_days == 0) || (empty_date + empty_days <= now);

    if (delete_junk) {
        key = "/apps/evolution/mail/junk/empty_date";
        gconf_client_set_int (client, key, now, NULL);
    }

    return delete_junk;
}

static gboolean
mail_shell_backend_empty_trash_policy_decision (EMailBackend *backend)
{
    EShell *shell;
    EShellSettings *shell_settings;
    GConfClient *client;
    const gchar *key;
    gboolean empty_trash;
    gint empty_date;
    gint empty_days;
    gint now;
    GError *error = NULL;

    shell = e_shell_backend_get_shell (E_SHELL_BACKEND (backend));

    client = e_shell_get_gconf_client (shell);
    shell_settings = e_shell_get_shell_settings (shell);

    now = time (NULL) / 60 / 60 / 24;

    empty_trash = e_shell_settings_get_boolean (
        shell_settings, "mail-empty-trash-on-exit");

    /* XXX No EShellSettings properties for these keys. */

    empty_date = empty_days = 0;

    if (empty_trash) {
        key = "/apps/evolution/mail/trash/empty_on_exit_days";
        empty_days = gconf_client_get_int (client, key, &error);
        if (error != NULL) {
            g_warning ("%s", error->message);
            g_error_free (error);
            return FALSE;
        }
    }

    if (empty_trash) {
        key = "/apps/evolution/mail/trash/empty_date";
        empty_date = gconf_client_get_int (client, key, &error);
        if (error != NULL) {
            g_warning ("%s", error->message);
            g_error_free (error);
            return FALSE;
        }
    }

    empty_trash &= (empty_days == 0) || (empty_date + empty_days <= now);

    if (empty_trash) {
        key = "/apps/evolution/mail/trash/empty_date";
        gconf_client_set_int (client, key, now, NULL);
    }

    return empty_trash;
}

static void
mail_shell_backend_class_init (EMailShellBackendClass *class)
{
    GObjectClass *object_class;
    EShellBackendClass *shell_backend_class;
    EMailBackendClass *mail_backend_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EMailShellBackendPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = mail_shell_backend_constructed;

    shell_backend_class = E_SHELL_BACKEND_CLASS (class);
    shell_backend_class->shell_view_type = E_TYPE_MAIL_SHELL_VIEW;
    shell_backend_class->name = BACKEND_NAME;
    shell_backend_class->aliases = "";
    shell_backend_class->schemes = "mailto:email";
    shell_backend_class->sort_order = 200;
    shell_backend_class->preferences_page = "mail-accounts";
    shell_backend_class->start = mail_shell_backend_start;

    mail_backend_class = E_MAIL_BACKEND_CLASS (class);
    mail_backend_class->delete_junk_policy_decision =
        mail_shell_backend_delete_junk_policy_decision;
    mail_backend_class->empty_trash_policy_decision =
        mail_shell_backend_empty_trash_policy_decision;
}

static void
mail_shell_backend_init (EMailShellBackend *mail_shell_backend)
{
    mail_shell_backend->priv = G_TYPE_INSTANCE_GET_PRIVATE (mail_shell_backend, E_TYPE_MAIL_SHELL_BACKEND, EMailShellBackendPrivate);
}

GType
e_mail_shell_backend_get_type (void)
{
    return mail_shell_backend_type;
}

void
e_mail_shell_backend_register_type (GTypeModule *type_module)
{
    const GTypeInfo type_info = {
        sizeof (EMailShellBackendClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) mail_shell_backend_class_init,
        (GClassFinalizeFunc) NULL,
        NULL,  /* class_data */
        sizeof (EMailShellBackend),
        0,     /* n_preallocs */
        (GInstanceInitFunc) mail_shell_backend_init,
        NULL   /* value_table */
    };

    mail_shell_backend_type = g_type_module_register_type (
        type_module, E_TYPE_MAIL_BACKEND,
        "EMailShellBackend", &type_info, 0);
}

/******************* Code below here belongs elsewhere. *******************/

#include "filter/e-filter-option.h"
#include "shell/e-shell-settings.h"
#include "mail/e-mail-label-list-store.h"

GSList *
e_mail_labels_get_filter_options (void)
{
    EShell *shell;
    EShellSettings *shell_settings;
    EMailLabelListStore *list_store;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GSList *list = NULL;
    gboolean valid;

    shell = e_shell_get_default ();
    shell_settings = e_shell_get_shell_settings (shell);
    list_store = e_shell_settings_get_object (
        shell_settings, "mail-label-list-store");

    model = GTK_TREE_MODEL (list_store);
    valid = gtk_tree_model_get_iter_first (model, &iter);

    while (valid) {
        struct _filter_option *option;
        gchar *name, *tag;

        name = e_mail_label_list_store_get_name (list_store, &iter);
        tag = e_mail_label_list_store_get_tag (list_store, &iter);

        if (g_str_has_prefix (tag, "$Label")) {
            gchar *tmp = tag;

            tag = g_strdup (tag + 6);

            g_free (tmp);
        }

        option = g_new0 (struct _filter_option, 1);
        option->title = e_str_without_underscores (name);
        option->value = tag;  /* takes ownership */
        list = g_slist_prepend (list, option);

        g_free (name);

        valid = gtk_tree_model_iter_next (model, &iter);
    }

    g_object_unref (list_store);

    return g_slist_reverse (list);
}

/* utility functions for mbox importer */
static void
mbox_create_preview_cb (GObject *preview, GtkWidget **preview_widget)
{
    EMFormatHTMLDisplay *format;
    EWebView *web_view;

    g_return_if_fail (preview != NULL);
    g_return_if_fail (preview_widget != NULL);

    format = em_format_html_display_new ();
    g_object_set_data_full (
        preview, "mbox-imp-formatter", format, g_object_unref);
    web_view = em_format_html_get_web_view (EM_FORMAT_HTML (format));

    *preview_widget = GTK_WIDGET (web_view);
}

static void
mbox_fill_preview_cb (GObject *preview, CamelMimeMessage *msg)
{
    EMFormatHTMLDisplay *format;

    g_return_if_fail (preview != NULL);
    g_return_if_fail (msg != NULL);

    format = g_object_get_data (preview, "mbox-imp-formatter");
    g_return_if_fail (format != NULL);

    /* FIXME Not passing a GCancellable here. */
    em_format_format (EM_FORMAT (format), NULL, NULL, msg, NULL);
}