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nautilus-menu-provider.c

/*
 *  nautilus-property-page-provider.c - Interface for Nautilus extensions 
 *                                      that provide context menu items
 *                                      for files.
 *
 *  Copyright (C) 2003 Novell, Inc.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * 
 *  Author:  Dave Camp <dave@ximian.com>
 *
 */

#include <config.h>
#include "nautilus-menu-provider.h"

#include <glib-object.h>

static void
nautilus_menu_provider_base_init (gpointer g_class)
{
      static gboolean initialized = FALSE;

      if (!initialized)
      {
            /* This signal should be emited each time the extension modify the list of menu items */
            g_signal_new ("items_updated",
                  NAUTILUS_TYPE_MENU_PROVIDER,
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);
            initialized = TRUE;
      }
}

GType                   
nautilus_menu_provider_get_type (void)
{
      static GType type = 0;

      if (!type) {
            const GTypeInfo info = {
                  sizeof (NautilusMenuProviderIface),
                  nautilus_menu_provider_base_init,
                  NULL,
                  NULL,
                  NULL,
                  NULL,
                  0,
                  0,
                  NULL
            };
            
            type = g_type_register_static (G_TYPE_INTERFACE, 
                                     "NautilusMenuProvider",
                                     &info, 0);
            g_type_interface_add_prerequisite (type, G_TYPE_OBJECT);
      }

      return type;
}

GList *
nautilus_menu_provider_get_file_items (NautilusMenuProvider *provider,
                               GtkWidget *window,
                               GList *files)
{
      g_return_val_if_fail (NAUTILUS_IS_MENU_PROVIDER (provider), NULL);

      if (NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_file_items) {
            return NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_file_items 
                  (provider, window, files);
      } else {
            return NULL;
      }
}

GList *
nautilus_menu_provider_get_background_items (NautilusMenuProvider *provider,
                                   GtkWidget *window,
                                   NautilusFileInfo *current_folder)
{
      g_return_val_if_fail (NAUTILUS_IS_MENU_PROVIDER (provider), NULL);
      g_return_val_if_fail (NAUTILUS_IS_FILE_INFO (current_folder), NULL);

      if (NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_background_items) {
            return NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_background_items 
                  (provider, window, current_folder);
      } else {
            return NULL;
      }
}

GList *
nautilus_menu_provider_get_toolbar_items (NautilusMenuProvider *provider,
                                GtkWidget *window,
                                NautilusFileInfo *current_folder)
{
      g_return_val_if_fail (NAUTILUS_IS_MENU_PROVIDER (provider), NULL);
      g_return_val_if_fail (NAUTILUS_IS_FILE_INFO (current_folder), NULL);

      if (NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_toolbar_items) {
            return NAUTILUS_MENU_PROVIDER_GET_IFACE (provider)->get_toolbar_items 
                  (provider, window, current_folder);
      } else {
            return NULL;
      }
}

/* This function emit a signal to inform nautilus that its item list has changed */
void
nautilus_menu_provider_emit_items_updated_signal (NautilusMenuProvider* provider)
{
      g_return_if_fail (NAUTILUS_IS_MENU_PROVIDER (provider));

      g_signal_emit_by_name (provider, "items_updated");
}


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