1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/*
 *  baul-column-provider.c - Interface for Baul extensions
 *                               that provide column specifications.
 *
 *  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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *  Author:  Dave Camp <dave@ximian.com>
 *
 */

#include <config.h>
#include "baul-column-provider.h"

#include <glib-object.h>

/**
 * SECTION:baul-column-provider
 * @title: BaulColumnProvider
 * @short_description: Interface to provide additional list view columns
 * @include: libbaul-extension/baul-column-provider.h
 *
 * #BaulColumnProvider allows extension to provide additional columns
 * in the file manager list view.
 */

static void
baul_column_provider_base_init (gpointer g_class G_GNUC_UNUSED)
{
}

GType
baul_column_provider_get_type (void)<--- The function 'baul_column_provider_get_type' should have static linkage since it is not used outside of its translation unit.
{
    static GType type = 0;

    if (!type) {
        const GTypeInfo info = {
            sizeof (BaulColumnProviderIface),
            baul_column_provider_base_init,
            NULL,
            NULL,
            NULL,
            NULL,
            0,
            0,
            NULL
        };

        type = g_type_register_static (G_TYPE_INTERFACE,
                                       "BaulColumnProvider",
                                       &info, 0);
        g_type_interface_add_prerequisite (type, G_TYPE_OBJECT);
    }

    return type;
}

/**
 * baul_column_provider_get_columns:
 * @provider: a #BaulColumnProvider
 *
 * Returns: (element-type BaulColumn) (transfer full): the provided #BaulColumn objects
 */
GList *
baul_column_provider_get_columns (BaulColumnProvider *provider)
{
    g_return_val_if_fail (BAUL_IS_COLUMN_PROVIDER (provider), NULL);
    g_return_val_if_fail (BAUL_COLUMN_PROVIDER_GET_IFACE (provider)->get_columns != NULL, NULL);

    return BAUL_COLUMN_PROVIDER_GET_IFACE (provider)->get_columns
           (provider);
}