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+/*
+ * nautilus-column-provider.h - Interface for Nautilus extensions that
+ * provide column descriptions.
+ *
+ * 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 columns to the list view and details to the icon view.
+ * Extensions are asked for a list of columns to display. Each
+ * returned column refers to a string attribute which can be filled in
+ * by NautilusInfoProvider */
+
+#pragma once
+
+#if !defined (NAUTILUS_EXTENSION_H) && !defined (NAUTILUS_COMPILATION)
+#warning "Only <nautilus-extension.h> should be included directly."
+#endif
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define NAUTILUS_TYPE_COLUMN_PROVIDER (nautilus_column_provider_get_type ())
+
+G_DECLARE_INTERFACE (NautilusColumnProvider, nautilus_column_provider,
+ NAUTILUS, COLUMN_PROVIDER,
+ GObject)
+
+/**
+ * SECTION:nautilus-column-provider
+ * @title: NautilusColumnProvider
+ * @short_description: Interface to provide additional list view columns
+ *
+ * #NautilusColumnProvider allows extension to provide additional columns
+ * in the file manager list view.
+ */
+
+/**
+ * NautilusColumnProviderInterface:
+ * @g_iface: The parent interface.
+ * @get_columns: Returns a #GList of #NautilusColumn.
+ * See nautilus_column_provider_get_columns() for details.
+ *
+ * Interface for extensions to provide additional list view columns.
+ */
+struct _NautilusColumnProviderInterface
+{
+ GTypeInterface g_iface;
+
+ GList *(*get_columns) (NautilusColumnProvider *provider);
+};
+
+/**
+ * nautilus_column_provider_get_columns:
+ * @provider: a #NautilusColumnProvider
+ *
+ * Returns: (nullable) (element-type NautilusColumn) (transfer full): the provided #NautilusColumn objects
+ */
+GList *nautilus_column_provider_get_columns (NautilusColumnProvider *provider);
+
+G_END_DECLS