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/*
 * 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/>
 *
 *
 * Authors:
 *      Srinivasa Ragavan <sragavan@gnome.org>
 *
 * Copyright (C) 2010 Intel corporation. (www.intel.com)
 *
 */

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

#include <glib/gi18n.h>

#include "mail/e-mail-reader.h"
#include "mail/message-list.h"
#include "mail/em-folder-tree.h"
#include "e-mail-notebook-view.h"
#include "e-mail-folder-pane.h"
#include "libemail-engine/e-mail-folder-utils.h"
#include "e-mail-message-pane.h"

#include <shell/e-shell-window-actions.h>

#define E_MAIL_NOTEBOOK_VIEW_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_NOTEBOOK_VIEW, EMailNotebookViewPrivate))

struct _EMailNotebookViewPrivate {
    GtkNotebook *book;
    EMailView *current_view;
    GHashTable *views;
    gboolean inited;
};

enum {
    PROP_0,
    PROP_FORWARD_STYLE,
    PROP_GROUP_BY_THREADS,
    PROP_REPLY_STYLE
};

#define E_SHELL_WINDOW_ACTION_GROUP_MAIL(window) \
    E_SHELL_WINDOW_ACTION_GROUP ((window), "mail")

/* Forward Declarations */
static void e_mail_notebook_view_reader_init (EMailReaderInterface *interface);

G_DEFINE_TYPE_WITH_CODE (
    EMailNotebookView, e_mail_notebook_view, E_TYPE_MAIL_VIEW,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_READER, e_mail_notebook_view_reader_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_EXTENSIBLE, NULL))

static gint
emnv_get_page_num (EMailNotebookView *view,
                   GtkWidget *widget)
{
    EMailNotebookViewPrivate *priv = view->priv;
    gint i, n;

    n = gtk_notebook_get_n_pages (priv->book);

    for (i = 0; i < n; i++) {
        GtkWidget *curr = gtk_notebook_get_nth_page (priv->book, i);
        if (curr == widget)
            return i;
    }

    return 0;
}

static void
mnv_page_changed (GtkNotebook *book,
                  GtkWidget *page,
                  guint page_num,
                  EMailView *view)
{
    EMailNotebookViewPrivate *priv;
    EShellView *shell_view;
    EShellSidebar *shell_sidebar;
    EMFolderTree *folder_tree;
    EMailView *mview;
    CamelFolder *folder;

    priv = E_MAIL_NOTEBOOK_VIEW_GET_PRIVATE (view);

    shell_view = e_mail_view_get_shell_view (view);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    page = gtk_notebook_get_nth_page (book, page_num);
    folder = e_mail_reader_get_folder (E_MAIL_READER (page));
    mview = E_MAIL_VIEW (page);

    g_object_get (shell_sidebar, "folder-tree", &folder_tree, NULL);

    if (folder != NULL && E_IS_MAIL_FOLDER_PANE (mview)) {
        gchar *folder_uri;

        folder_uri = e_mail_folder_uri_from_folder (folder);
        em_folder_tree_set_selected (folder_tree, folder_uri, FALSE);
        g_free (folder_uri);
    }

    if (mview != priv->current_view) {
        e_mail_view_set_previous_view (mview, priv->current_view);
        priv->current_view = mview;
    }

    /* For EMailReader related changes to EShellView */
    g_signal_emit_by_name (view, "changed");
    g_signal_emit_by_name (view, "folder-loaded");

    /* For EMailShellContent related changes */
    g_signal_emit_by_name (view, "view-changed");

    g_object_unref (folder_tree);
}

static void
tab_remove_gtk_cb (GtkWidget *button,
                   EMailNotebookView *view)
{
    EMailView *page = g_object_get_data ((GObject *) button, "page");
    EMailView *prev;
    gint num;

    if (gtk_notebook_get_n_pages (view->priv->book) == 1)
        return;

    if (E_IS_MAIL_FOLDER_PANE (page)) {
        CamelFolder *folder;
        gchar *folder_uri;

        folder = e_mail_reader_get_folder (E_MAIL_READER (page));
        folder_uri = e_mail_folder_uri_from_folder (folder);
        g_hash_table_remove (view->priv->views, folder_uri);
        g_free (folder_uri);
    }

    prev = e_mail_view_get_previous_view (page);
    if (prev) {
        num = emnv_get_page_num (view, (GtkWidget *) prev);
        gtk_notebook_set_current_page (view->priv->book, num);
    }
    gtk_notebook_remove_page (
        view->priv->book,
        gtk_notebook_page_num (view->priv->book, (GtkWidget *) page));

}

static void
adjust_label_size_request (GtkWidget *view,
                           GtkAllocation *allocation,
                           GtkWidget *label)
{
    GtkRequisition requisition;
    gint max_width = allocation->width / 2;

    /* We make sure the label is not over-ellipisized, but doesn't
     * get too big to cause the tab to not fit either. */
    gtk_widget_get_preferred_size (label, NULL, &requisition);
    if (requisition.width < max_width)
        gtk_widget_set_size_request (label, requisition.width, -1);
    else
        gtk_widget_set_size_request (label, max_width, -1);
}

static void
disconnect_label_adjusting (EMailNotebookView *view,
                            GtkWidget *label)
{
    g_signal_handlers_disconnect_by_func (
        view,
        adjust_label_size_request,
        label);
}

static GtkWidget *
create_tab_label (EMailNotebookView *view,
                  EMailView *page,
                  const gchar *str)
{
    GtkWidget *container, *widget;
    GtkAllocation allocation;

    widget = gtk_hbox_new (FALSE, 0);
    gtk_widget_show (widget);
    container = widget;

    widget = gtk_label_new (str);
    gtk_label_set_ellipsize (GTK_LABEL (widget), PANGO_ELLIPSIZE_END);
    gtk_widget_show (widget);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, FALSE, 0);

    gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
    adjust_label_size_request (GTK_WIDGET (view), &allocation, widget);

    g_signal_connect (
        view, "size-allocate",
        G_CALLBACK (adjust_label_size_request), widget);

    g_object_weak_ref (
        G_OBJECT (widget),
        (GWeakNotify) disconnect_label_adjusting,
        view);

    widget = gtk_button_new ();
    gtk_button_set_relief (GTK_BUTTON (widget), GTK_RELIEF_NONE);
    gtk_button_set_image (
        GTK_BUTTON (widget), gtk_image_new_from_stock (
        "gtk-close", GTK_ICON_SIZE_MENU));
    gtk_widget_show_all (widget);
    gtk_box_pack_end (GTK_BOX (container), widget, FALSE, FALSE, 0);
    g_object_set_data ((GObject *) widget, "page", page);
    g_object_set_data ((GObject *) page, "close-button", widget);

    g_signal_connect (
        widget, "clicked",
        G_CALLBACK (tab_remove_gtk_cb), view);

    return container;
}

static void
mail_notebook_view_constructed (GObject *object)
{
    EMailNotebookViewPrivate *priv;
    EShellView *shell_view;
    GtkWidget *container;
    GtkWidget *widget;

    priv = E_MAIL_NOTEBOOK_VIEW_GET_PRIVATE (object);

    container = GTK_WIDGET (object);

    widget = gtk_notebook_new ();
    priv->book = (GtkNotebook *) widget;
    gtk_widget_show (widget);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);

    gtk_notebook_set_scrollable ((GtkNotebook *) widget, TRUE);

    gtk_notebook_set_show_border ((GtkNotebook *) widget, FALSE);

    shell_view = e_mail_view_get_shell_view (E_MAIL_VIEW (object));
    priv->current_view = e_mail_folder_pane_new (shell_view);
    e_mail_view_set_preview_visible (priv->current_view, FALSE);
    gtk_widget_show (GTK_WIDGET (priv->current_view));

    gtk_notebook_append_page (
        priv->book, GTK_WIDGET (priv->current_view),
        create_tab_label (E_MAIL_NOTEBOOK_VIEW (object),
        priv->current_view, _("Please select a folder")));

    g_signal_connect (
        priv->book, "switch-page",
        G_CALLBACK (mnv_page_changed), object);

    e_extensible_load_extensions (E_EXTENSIBLE (object));

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

static void
mail_notebook_view_set_property (GObject *object,
                                 guint property_id,
                                 const GValue *value,
                                 GParamSpec *pspec)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (object);
    current_view = notebook_view->priv->current_view;

    switch (property_id) {
        case PROP_FORWARD_STYLE:
            e_mail_reader_set_forward_style (
                E_MAIL_READER (current_view),
                g_value_get_enum (value));
            return;

        case PROP_GROUP_BY_THREADS:
            e_mail_reader_set_group_by_threads (
                E_MAIL_READER (current_view),
                g_value_get_boolean (value));
            return;

        case PROP_REPLY_STYLE:
            e_mail_reader_set_reply_style (
                E_MAIL_READER (current_view),
                g_value_get_enum (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_notebook_view_get_property (GObject *object,
                                 guint property_id,
                                 GValue *value,
                                 GParamSpec *pspec)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (object);
    current_view = notebook_view->priv->current_view;

    switch (property_id) {
        case PROP_FORWARD_STYLE:
            g_value_set_enum (
                value,
                e_mail_reader_get_forward_style (
                E_MAIL_READER (current_view)));
            return;

        case PROP_GROUP_BY_THREADS:
            g_value_set_boolean (
                value,
                e_mail_reader_get_group_by_threads (
                E_MAIL_READER (current_view)));
            return;

        case PROP_REPLY_STYLE:
            g_value_set_enum (
                value,
                e_mail_reader_get_reply_style (
                E_MAIL_READER (current_view)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_notebook_view_set_search_strings (EMailView *view,
                                       GSList *search_strings)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    e_mail_view_set_search_strings (current_view, search_strings);
}

static GalViewInstance *
mail_notebook_view_get_view_instance (EMailView *view)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return NULL;

    return e_mail_view_get_view_instance (current_view);
}

static void
mail_notebook_view_update_view_instance (EMailView *view)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return;

    e_mail_view_update_view_instance (current_view);
}

static void
mail_notebook_view_set_orientation (EMailView *view,
                                    GtkOrientation orientation)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return;

    e_mail_view_set_orientation (current_view, orientation);
}

static GtkOrientation
mail_notebook_view_get_orientation (EMailView *view)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return GTK_ORIENTATION_VERTICAL;

    return e_mail_view_get_orientation (current_view);
}

static gboolean
mail_notebook_view_get_show_deleted (EMailView *view)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return FALSE;

    return e_mail_view_get_show_deleted (current_view);
}

static void
mail_notebook_view_set_show_deleted (EMailView *view,
                                     gboolean show_deleted)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return;

    e_mail_view_set_show_deleted (current_view, show_deleted);
}

static gboolean
mail_notebook_view_get_preview_visible (EMailView *view)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return FALSE;

    return e_mail_view_get_preview_visible (current_view);
}

static void
mail_notebook_view_set_preview_visible (EMailView *view,
                                        gboolean preview_visible)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (view);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return;

    e_mail_view_set_preview_visible (current_view, preview_visible);
}

static GtkActionGroup *
mail_notebook_view_get_action_group (EMailReader *reader,
                                     EMailReaderActionGroup group)
{
    EMailView *view;
    EShellView *shell_view;
    EShellWindow *shell_window;
    const gchar *group_name;

    view = E_MAIL_VIEW (reader);
    shell_view = e_mail_view_get_shell_view (view);
    shell_window = e_shell_view_get_shell_window (shell_view);

    switch (group) {
        case E_MAIL_READER_ACTION_GROUP_STANDARD:
            group_name = "mail";
            break;
        case E_MAIL_READER_ACTION_GROUP_SEARCH_FOLDERS:
            group_name = "search-folders";
            break;
        default:
            g_return_val_if_reached (NULL);
    }

    return e_shell_window_get_action_group (shell_window, group_name);
}

static EAlertSink *
mail_notebook_view_get_alert_sink (EMailReader *reader)
{
    EMailView *view;
    EShellView *shell_view;
    EShellContent *shell_content;

    view = E_MAIL_VIEW (reader);
    shell_view = e_mail_view_get_shell_view (view);
    shell_content = e_shell_view_get_shell_content (shell_view);

    return E_ALERT_SINK (shell_content);
}

static EMailBackend *
mail_notebook_view_get_backend (EMailReader *reader)
{
    EMailView *view;
    EShellView *shell_view;
    EShellBackend *shell_backend;

    view = E_MAIL_VIEW (reader);
    shell_view = e_mail_view_get_shell_view (view);
    shell_backend = e_shell_view_get_shell_backend (shell_view);

    return E_MAIL_BACKEND (shell_backend);
}

static EMailDisplay *
mail_notebook_view_get_mail_display (EMailReader *reader)
{
    EMailNotebookViewPrivate *priv;

    priv = E_MAIL_NOTEBOOK_VIEW (reader)->priv;

    if (priv->current_view == NULL)
        return NULL;

    return e_mail_reader_get_mail_display (E_MAIL_READER (priv->current_view));
}

static gboolean
mail_notebook_view_get_hide_deleted (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return FALSE;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_get_hide_deleted (reader);
}

static GtkWidget *
mail_notebook_view_get_message_list (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return NULL;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_get_message_list (reader);
}

static GtkMenu *
mail_notebook_view_get_popup_menu (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return NULL;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_get_popup_menu (reader);
}

static EPreviewPane *
mail_notebook_view_get_preview_pane (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return NULL;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_get_preview_pane (reader);
}

static GtkWindow *
mail_notebook_view_get_window (EMailReader *reader)
{
    EMailView *view;
    EShellWindow *shell_window;
    EShellView *shell_view;

    view = E_MAIL_VIEW (reader);
    shell_view = e_mail_view_get_shell_view (view);
    shell_window = e_shell_view_get_shell_window (shell_view);

    return GTK_WINDOW (shell_window);
}

static void
reconnect_changed_event (EMailReader *child,
                         EMailReader *parent)
{
    g_signal_emit_by_name (parent, "changed");
}

static void
reconnect_folder_loaded_event (EMailReader *child,
                               EMailReader *parent)
{
    g_signal_emit_by_name (parent, "folder-loaded");
}

static void
mail_netbook_view_open_mail (EMailView *view,
                             const gchar *uid,
                             EMailNotebookView *nview)
{
    EMailNotebookViewPrivate *priv;
    EShellView *shell_view;
    CamelFolder *folder;
    EMailView *pane;
    gint page;
    CamelMessageInfo *info;
    gint pos;

    priv = nview->priv;

    shell_view = e_mail_view_get_shell_view (E_MAIL_VIEW (nview));
    pos = emnv_get_page_num (nview, GTK_WIDGET (priv->current_view));
    pane = e_mail_message_pane_new (shell_view);
    e_mail_view_set_previous_view (pane, priv->current_view);
    E_MAIL_MESSAGE_PANE (pane)->parent_folder_view = priv->current_view;
    priv->current_view = pane;

    gtk_widget_show (GTK_WIDGET (pane));

    folder = e_mail_reader_get_folder (E_MAIL_READER (view));

    info = camel_folder_get_message_info (folder, uid);

    page = gtk_notebook_insert_page (
        priv->book, GTK_WIDGET (pane),
        create_tab_label (nview, priv->current_view,
        camel_message_info_subject (info)), pos + 1);

    gtk_notebook_set_current_page (priv->book, page);

    g_signal_connect (
        E_MAIL_READER (pane), "changed",
        G_CALLBACK (reconnect_changed_event), nview);
    g_signal_connect (
        E_MAIL_READER (pane), "folder-loaded",
        G_CALLBACK (reconnect_folder_loaded_event), nview);
    e_mail_reader_set_folder (
        E_MAIL_READER (pane), folder);
    e_mail_reader_set_group_by_threads (
        E_MAIL_READER (pane),
        e_mail_reader_get_group_by_threads (E_MAIL_READER (view)));

    e_mail_reader_enable_show_folder (E_MAIL_READER (pane));
    e_mail_reader_set_message (E_MAIL_READER (pane), uid);
    camel_message_info_free (info);
}

static void
mail_notebook_view_set_folder (EMailReader *reader,
                               CamelFolder *folder)
{
    EMailNotebookViewPrivate *priv;
    GtkWidget *new_view;
    gchar *folder_uri;

    if (folder == NULL)
        return;

    priv = E_MAIL_NOTEBOOK_VIEW_GET_PRIVATE (reader);

    folder_uri = e_mail_folder_uri_from_folder (folder);
    new_view = g_hash_table_lookup (priv->views, folder_uri);
    g_free (folder_uri);

    if (new_view) {
        gint curr = emnv_get_page_num (E_MAIL_NOTEBOOK_VIEW (reader), new_view);

        priv->current_view = (EMailView *) new_view;
        gtk_notebook_set_current_page (priv->book, curr);
        return;
    }

    /* FIXME Redundant NULL check. */
    if (folder != NULL) {
        gint page;

        if (priv->inited) {
            EMailView *old_view = priv->current_view;
            EShellView *shell_view;

            shell_view = e_mail_view_get_shell_view (E_MAIL_VIEW (reader));
            priv->current_view = e_mail_folder_pane_new (shell_view);
            gtk_widget_show ((GtkWidget *) priv->current_view);
            e_mail_view_set_previous_view (priv->current_view, old_view);
            page = gtk_notebook_append_page (
                priv->book, (GtkWidget *) priv->current_view,
                create_tab_label (
                    E_MAIL_NOTEBOOK_VIEW (reader),
                    priv->current_view,
                    camel_folder_get_full_name (folder)));
            gtk_notebook_set_current_page (priv->book, page);

        } else {
            priv->inited = TRUE;
            gtk_notebook_set_tab_label (
                priv->book,
                GTK_WIDGET (priv->current_view),
                create_tab_label (
                    E_MAIL_NOTEBOOK_VIEW (reader),
                    priv->current_view,
                    camel_folder_get_full_name (folder)));
        }

        e_mail_reader_set_folder (E_MAIL_READER (priv->current_view), folder);

        folder_uri = e_mail_folder_uri_from_folder (folder);
        g_hash_table_insert (priv->views, folder_uri, priv->current_view);
        g_signal_connect (
            priv->current_view, "changed",
            G_CALLBACK (reconnect_changed_event), reader);
        g_signal_connect (
            priv->current_view, "folder-loaded",
            G_CALLBACK (reconnect_folder_loaded_event), reader);
        g_signal_connect (
            priv->current_view, "open-mail",
            G_CALLBACK (mail_netbook_view_open_mail), reader);
    }
}

static gboolean
mail_notebook_view_enable_show_folder (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return FALSE;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_get_enable_show_folder (reader);
}

static guint
mail_notebook_view_open_selected_mail (EMailReader *reader)
{
    EMailNotebookView *notebook_view;
    EMailView *current_view;

    notebook_view = E_MAIL_NOTEBOOK_VIEW (reader);
    current_view = notebook_view->priv->current_view;

    if (current_view == NULL)
        return 0;

    reader = E_MAIL_READER (current_view);

    return e_mail_reader_open_selected_mail (reader);
}

static void
e_mail_notebook_view_class_init (EMailNotebookViewClass *class)
{
    GObjectClass *object_class;
    EMailViewClass *mail_view_class;

    g_type_class_add_private (class, sizeof (EMailNotebookViewPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = mail_notebook_view_constructed;
    object_class->set_property = mail_notebook_view_set_property;
    object_class->get_property = mail_notebook_view_get_property;

    mail_view_class = E_MAIL_VIEW_CLASS (class);
    mail_view_class->set_search_strings = mail_notebook_view_set_search_strings;
    mail_view_class->get_view_instance = mail_notebook_view_get_view_instance;
    mail_view_class->update_view_instance = mail_notebook_view_update_view_instance;
    mail_view_class->set_orientation = mail_notebook_view_set_orientation;
    mail_view_class->get_orientation = mail_notebook_view_get_orientation;
    mail_view_class->get_show_deleted = mail_notebook_view_get_show_deleted;
    mail_view_class->set_show_deleted = mail_notebook_view_set_show_deleted;
    mail_view_class->get_preview_visible = mail_notebook_view_get_preview_visible;
    mail_view_class->set_preview_visible = mail_notebook_view_set_preview_visible;

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_FORWARD_STYLE,
        "forward-style");

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_GROUP_BY_THREADS,
        "group-by-threads");

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_REPLY_STYLE,
        "reply-style");
}

static void
e_mail_notebook_view_reader_init (EMailReaderInterface *interface)
{
    interface->get_action_group = mail_notebook_view_get_action_group;
    interface->get_alert_sink = mail_notebook_view_get_alert_sink;
    interface->get_backend = mail_notebook_view_get_backend;
    interface->get_mail_display = mail_notebook_view_get_mail_display;
    interface->get_hide_deleted = mail_notebook_view_get_hide_deleted;
    interface->get_message_list = mail_notebook_view_get_message_list;
    interface->get_popup_menu = mail_notebook_view_get_popup_menu;
    interface->get_preview_pane = mail_notebook_view_get_preview_pane;
    interface->get_window = mail_notebook_view_get_window;
    interface->set_folder = mail_notebook_view_set_folder;
    interface->open_selected_mail = mail_notebook_view_open_selected_mail;
    interface->enable_show_folder = mail_notebook_view_enable_show_folder;
}

static void
e_mail_notebook_view_init (EMailNotebookView *view)
{
    view->priv = E_MAIL_NOTEBOOK_VIEW_GET_PRIVATE (view);
    view->priv->inited = FALSE;
    view->priv->views = g_hash_table_new (g_str_hash, g_str_equal);
}

static void
emnv_show_folder (EMailNotebookView *view,
                  gpointer not_used)
{
    gint pos;
    EMailNotebookViewPrivate *priv = view->priv;

    pos = emnv_get_page_num (
        view, (GtkWidget *) E_MAIL_MESSAGE_PANE (
        priv->current_view)->parent_folder_view);

    gtk_notebook_set_current_page (priv->book, pos);

}

static void
emnv_show_prevtab (EMailNotebookView *view,
                   gpointer not_used)
{
    gint pos;
    EMailNotebookViewPrivate *priv = view->priv;

    pos = emnv_get_page_num (
        view, (GtkWidget *) E_MAIL_MESSAGE_PANE (
        priv->current_view)->parent_folder_view);

    pos = gtk_notebook_get_current_page (priv->book);
    if (pos > 0 )
        gtk_notebook_set_current_page (priv->book, pos - 1);

}

static void
emnv_show_nexttab (EMailNotebookView *view,
                   gpointer not_used)
{
    gint pos;
    EMailNotebookViewPrivate *priv = view->priv;

    pos = gtk_notebook_get_current_page (priv->book);
    if (pos < (gtk_notebook_get_n_pages (priv->book) - 1))
        gtk_notebook_set_current_page (priv->book, pos + 1);

}

static void
emnv_close_tab (EMailNotebookView *view,
                gpointer not_used)
{
    EMailNotebookViewPrivate *priv = view->priv;

    tab_remove_gtk_cb (
        g_object_get_data (
            G_OBJECT (priv->current_view), "close-button"),
        view);
}

GtkWidget *
e_mail_notebook_view_new (EShellView *shell_view)
{
    GtkWidget *widget;

    g_return_val_if_fail (E_IS_SHELL_VIEW (shell_view), NULL);

    widget = g_object_new (
        E_TYPE_MAIL_NOTEBOOK_VIEW,
        "shell-view", shell_view, NULL);
    g_signal_connect (
        widget, "show-folder",
        G_CALLBACK (emnv_show_folder), widget);
    g_signal_connect (
        widget, "show-next-tab",
        G_CALLBACK (emnv_show_nexttab), widget);
    g_signal_connect (
        widget, "show-previous-tab",
        G_CALLBACK (emnv_show_prevtab), widget);
    g_signal_connect (
        widget, "close-tab",
        G_CALLBACK (emnv_close_tab), widget);

    return widget;
}