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diff --git a/libnautilus-extension/nautilus-property-page-provider.h b/libnautilus-extension/nautilus-property-page-provider.h
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+/*
+ *  nautilus-property-page-provider.h - Interface for Nautilus extensions
+ *                                      that provide property pages.
+ *
+ *  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, see <http://www.gnu.org/licenses/>.
+ * 
+ *  Author:  Dave Camp <dave@ximian.com>
+ *
+ */
+
+/* This interface is implemented by Nautilus extensions that want to 
+ * add property page to property dialogs.  Extensions are called when 
+ * Nautilus needs property pages for a selection.  They are passed a 
+ * list of NautilusFileInfo objects for which information should
+ * be displayed  */
+
+#pragma once
+
+#if !defined (NAUTILUS_EXTENSION_H) && !defined (NAUTILUS_COMPILATION)
+#warning "Only <nautilus-extension.h> should be included directly."
+#endif
+
+#include <glib-object.h>
+/* These should be removed at some point. */
+#include "nautilus-extension-types.h"
+#include "nautilus-file-info.h"
+#include "nautilus-property-page.h"
+
+
+G_BEGIN_DECLS
+
+#define NAUTILUS_TYPE_PROPERTY_PAGE_PROVIDER (nautilus_property_page_provider_get_type ())
+
+G_DECLARE_INTERFACE (NautilusPropertyPageProvider, nautilus_property_page_provider,
+                     NAUTILUS, PROPERTY_PAGE_PROVIDER,
+                     GObject)
+
+/* For compatibility reasons, remove this once you start introducing breaking changes. */
+typedef NautilusPropertyPageProviderInterface NautilusPropertyPageProviderIface;
+
+/**
+ * SECTION:nautilus-property-page-provider
+ * @title: NautilusPropertyPageProvider
+ * @short_description: Interface to provide additional property pages
+ *
+ * #NautilusPropertyPageProvider allows extension to provide additional pages
+ * for the file properties dialog.
+ */
+
+/**
+ * NautilusPropertyPageProviderInterface:
+ * @g_iface: The parent interface.
+ * @get_pages: Returns a #GList of #NautilusPropertyPage.
+ *   See nautilus_property_page_provider_get_pages() for details.
+ *
+ * Interface for extensions to provide additional property pages.
+ */
+struct _NautilusPropertyPageProviderInterface
+{
+    GTypeInterface g_iface;
+
+    GList *(*get_pages) (NautilusPropertyPageProvider *provider,
+                         GList                        *files);
+};
+
+/**
+ * nautilus_property_page_provider_get_pages:
+ * @provider: a #NautilusPropertyPageProvider
+ * @files: (element-type NautilusFileInfo): a #GList of #NautilusFileInfo
+ *
+ * This function is called by Nautilus when it wants property page
+ * items from the extension.
+ *
+ * This function is called in the main thread before a property page
+ * is shown, so it should return quickly.
+ *
+ * Returns: (element-type NautilusPropertyPage) (transfer full): A #GList of allocated #NautilusPropertyPage items.
+ */
+GList *nautilus_property_page_provider_get_pages (NautilusPropertyPageProvider *provider,
+                                                  GList                        *files);
+
+G_END_DECLS