nautilus-3.6.3/libnautilus-extension/nautilus-column-provider.c

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 1 /*
 2  *  nautilus-column-provider.c - Interface for Nautilus extensions 
 3  *                               that provide column specifications.
 4  *
 5  *  Copyright (C) 2003 Novell, Inc.
 6  *
 7  *  This library is free software; you can redistribute it and/or
 8  *  modify it under the terms of the GNU Library General Public
 9  *  License as published by the Free Software Foundation; either
10  *  version 2 of the License, or (at your option) any later version.
11  *
12  *  This library is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  *  Library General Public License for more details.
16  *
17  *  You should have received a copy of the GNU Library General Public
18  *  License along with this library; if not, write to the Free
19  *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  * 
21  *  Author:  Dave Camp <dave@ximian.com>
22  *
23  */
24 
25 #include <config.h>
26 #include "nautilus-column-provider.h"
27 
28 #include <glib-object.h>
29 
30 static void
31 nautilus_column_provider_base_init (gpointer g_class)
32 {
33 }
34 
35 GType                   
36 nautilus_column_provider_get_type (void)
37 {
38 	static GType type = 0;
39 
40 	if (!type) {
41 		const GTypeInfo info = {
42 			sizeof (NautilusColumnProviderIface),
43 			nautilus_column_provider_base_init,
44 			NULL,
45 			NULL,
46 			NULL,
47 			NULL,
48 			0,
49 			0,
50 			NULL
51 		};
52 		
53 		type = g_type_register_static (G_TYPE_INTERFACE, 
54 					       "NautilusColumnProvider",
55 					       &info, 0);
56 		g_type_interface_add_prerequisite (type, G_TYPE_OBJECT);
57 	}
58 
59 	return type;
60 }
61 
62 /**
63  * nautilus_column_provider_get_columns:
64  * @provider: a #NautilusColumnProvider
65  *
66  * Returns: (element-type NautilusColumn) (transfer full): the provided #NautilusColumn objects
67  */
68 GList *
69 nautilus_column_provider_get_columns (NautilusColumnProvider *provider)
70 {
71 	g_return_val_if_fail (NAUTILUS_IS_COLUMN_PROVIDER (provider), NULL);
72 	g_return_val_if_fail (NAUTILUS_COLUMN_PROVIDER_GET_IFACE (provider)->get_columns != NULL, NULL);
73 
74 	return NAUTILUS_COLUMN_PROVIDER_GET_IFACE (provider)->get_columns 
75 		(provider);
76 }
77 
78