1 /*
2 * Copyright (C) 2005 Marco Pesenti Gritti
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2, or (at your option)
7 * any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 *
18 */
19
20 #include "config.h"
21
22 #include <glib/gi18n.h>
23 #include <string.h>
24
25 #include "ev-history.h"
26
27
28 enum
29 {
30 HISTORY_CHANGED,
31 N_SIGNALS
32 };
33
34 static guint signals[N_SIGNALS] = {0, };
35
36 struct _EvHistoryPrivate
37 {
38 GList *links;
39 };
40
G_DEFINE_TYPE_WITH_PRIVATE(EvHistory,ev_history,G_TYPE_OBJECT)41 G_DEFINE_TYPE_WITH_PRIVATE (EvHistory, ev_history, G_TYPE_OBJECT)
42
43 static void
44 ev_history_init (EvHistory *history)
45 {
46 history->priv = ev_history_get_instance_private (history);
47
48 history->priv->links = NULL;
49 }
50
51 static void
free_links_list(GList * l)52 free_links_list (GList *l)
53 {
54 g_list_foreach (l, (GFunc)g_object_unref, NULL);
55 g_list_free (l);
56 }
57
58 static void
ev_history_finalize(GObject * object)59 ev_history_finalize (GObject *object)
60 {
61 EvHistory *history = EV_HISTORY (object);
62
63 free_links_list (history->priv->links);
64
65 G_OBJECT_CLASS (ev_history_parent_class)->finalize (object);
66 }
67
68 static void
ev_history_class_init(EvHistoryClass * class)69 ev_history_class_init (EvHistoryClass *class)
70 {
71 GObjectClass *object_class = G_OBJECT_CLASS (class);
72
73 object_class->finalize = ev_history_finalize;
74
75 signals[HISTORY_CHANGED] =
76 g_signal_new ("changed",
77 G_OBJECT_CLASS_TYPE (object_class),
78 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
79 G_STRUCT_OFFSET (EvHistoryClass, changed),
80 NULL, NULL,
81 g_cclosure_marshal_VOID__VOID,
82 G_TYPE_NONE, 0);
83 }
84
85 #define HISTORY_LENGTH 7
86
87 void
ev_history_add_link(EvHistory * history,EvLink * link)88 ev_history_add_link (EvHistory *history, EvLink *link)
89 {
90 GList *l;
91
92 g_return_if_fail (EV_IS_HISTORY (history));
93 g_return_if_fail (EV_IS_LINK (link));
94
95 for (l = history->priv->links; l; l = l->next) {
96 if (!strcmp (ev_link_get_title (EV_LINK (l->data)), ev_link_get_title (link))) {
97 g_object_unref (G_OBJECT (l->data));
98 history->priv->links = g_list_delete_link (history->priv->links, l);
99 break;
100 }
101 }
102
103 g_object_ref (link);
104 history->priv->links = g_list_append (history->priv->links,
105 link);
106
107 if (g_list_length (history->priv->links) > HISTORY_LENGTH) {
108 g_object_unref (G_OBJECT (history->priv->links->data));
109 history->priv->links = g_list_delete_link (history->priv->links,
110 history->priv->links);
111 }
112
113 g_signal_emit (history, signals[HISTORY_CHANGED], 0);
114 }
115
116 EvLink *
ev_history_get_link_nth(EvHistory * history,int index)117 ev_history_get_link_nth (EvHistory *history, int index)
118 {
119 g_return_val_if_fail (EV_IS_HISTORY (history), NULL);
120
121 return EV_LINK (g_list_nth_data (history->priv->links, index));
122 }
123
124 int
ev_history_get_n_links(EvHistory * history)125 ev_history_get_n_links (EvHistory *history)
126 {
127 g_return_val_if_fail (EV_IS_HISTORY (history), -1);
128
129 return g_list_length (history->priv->links);
130 }
131
132 EvHistory *
ev_history_new(void)133 ev_history_new (void)
134 {
135 return EV_HISTORY (g_object_new (EV_TYPE_HISTORY, NULL));
136 }
137
138