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1 /*
2 * Copyright (C) 2003 Jeffrey Yasskin <jyasskin@mail.utexas.edu>
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 of the License, or
7 * (at your option) any later version.
8 *
9 * The Rhythmbox authors hereby grant permission for non-GPL compatible
10 * GStreamer plugins to be used and distributed together with GStreamer
11 * and Rhythmbox. This permission is above and beyond the permissions granted
12 * by the GPL license by which Rhythmbox is covered. If you modify this code
13 * you may extend this exception to your version of the code, but you are not
14 * obligated to do so. If you do not wish to do so, delete this exception
15 * statement from your version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
25 *
26 */
27
28 #include "config.h"
29
30 #include "rb-play-order-linear-loop.h"
31
32 #include "rb-debug.h"
33 #include "rb-util.h"
34
35 static void rb_linear_play_order_loop_class_init (RBLinearPlayOrderLoopClass *klass);
36
37 static RhythmDBEntry* rb_linear_play_order_loop_get_next (RBPlayOrder* method);
38 static RhythmDBEntry* rb_linear_play_order_loop_get_previous (RBPlayOrder* method);
39
40 G_DEFINE_TYPE (RBLinearPlayOrderLoop, rb_linear_play_order_loop, RB_TYPE_PLAY_ORDER)
41
42 RBPlayOrder *
43 rb_linear_play_order_loop_new (RBShellPlayer *player)
44 {
45 RBLinearPlayOrderLoop *lorder;
46
47 lorder = g_object_new (RB_TYPE_LINEAR_PLAY_ORDER_LOOP,
48 "player", player,
49 NULL);
50
51 return RB_PLAY_ORDER (lorder);
52 }
53
54 static void
55 rb_linear_play_order_loop_class_init (RBLinearPlayOrderLoopClass *klass)
56 {
57 RBPlayOrderClass *porder = RB_PLAY_ORDER_CLASS (klass);
58 porder->has_next = rb_play_order_model_not_empty;
59 porder->has_previous = rb_play_order_model_not_empty;
60 porder->get_next = rb_linear_play_order_loop_get_next;
61 porder->get_previous = rb_linear_play_order_loop_get_previous;
62 }
63
64 static void
65 rb_linear_play_order_loop_init (RBLinearPlayOrderLoop *porder)
66 {
67 }
68
69 static RhythmDBEntry *
70 rb_linear_play_order_loop_get_next (RBPlayOrder *porder)
71 {
72 RhythmDBQueryModel *model;
73 RhythmDBEntry *entry;
74
75 g_return_val_if_fail (porder != NULL, NULL);
76 g_return_val_if_fail (RB_IS_LINEAR_PLAY_ORDER_LOOP (porder), NULL);
77
78 model = rb_play_order_get_query_model (porder);
79 if (model == NULL)
80 return NULL;
81
82 g_object_get (porder, "playing-entry", &entry, NULL);
83
84 if (entry != NULL) {
85 RhythmDBEntry *next;
86
87 next = rhythmdb_query_model_get_next_from_entry (model, entry);
88 rhythmdb_entry_unref (entry);
89 entry = next;
90 }
91
92 if (entry == NULL) {
93 /* loop back to (or start from) the first entry */
94 GtkTreeIter iter;
95 if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (model), &iter))
96 return NULL;
97 return rhythmdb_query_model_iter_to_entry (model, &iter);
98 }
99
100 return entry;
101 }
102
103 static RhythmDBEntry *
104 rb_linear_play_order_loop_get_previous (RBPlayOrder *porder)
105 {
106 RhythmDBQueryModel *model;
107 RhythmDBEntry *entry;
108 RhythmDBEntry *prev = NULL;
109
110 g_return_val_if_fail (porder != NULL, NULL);
111 g_return_val_if_fail (RB_IS_LINEAR_PLAY_ORDER_LOOP (porder), NULL);
112
113 model = rb_play_order_get_query_model (porder);
114 if (model == NULL)
115 return NULL;
116
117 g_object_get (porder, "playing-entry", &entry, NULL);
118 if (entry != NULL) {
119 prev = rhythmdb_query_model_get_previous_from_entry (model, entry);
120 rhythmdb_entry_unref (entry);
121 }
122
123 if (prev == NULL) {
124 /* loop to last entry */
125 GtkTreeIter iter;
126 gint num_entries = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (model), NULL);
127 if (!gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (model), &iter, NULL, num_entries-1))
128 return NULL;
129 prev = rhythmdb_query_model_iter_to_entry (model, &iter);
130 }
131
132 return prev;
133 }