control/hierarchical_media_list_view.c: Don't lock too soon the mlist.
[vlc.git] / src / control / hierarchical_media_list_view.c
1 /*****************************************************************************
2  * hierarchical_media_list_view.c: libvlc hierarchical media list view functs.
3  *****************************************************************************
4  * Copyright (C) 2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 #include "libvlc_internal.h"
25 #include <vlc/libvlc.h>
26 #include <assert.h>
27 #include "vlc_arrays.h"
28
29 //#define DEBUG_HIERARCHICAL_VIEW
30
31 #ifdef DEBUG_HIERARCHICAL_VIEW
32 # define trace( fmt, ... ) printf( "%s(): " fmt, __FUNCTION__, ##__VA_ARGS__ )
33 #else
34 # define trace( ... )
35 #endif
36
37 struct libvlc_media_list_view_private_t
38 {
39     vlc_array_t array;
40 };
41
42 /*
43  * Private functions
44  */
45
46 /**************************************************************************
47  *       flat_media_list_view_count  (private)
48  * (called by media_list_view_count)
49  **************************************************************************/
50 static int
51 hierarch_media_list_view_count( libvlc_media_list_view_t * p_mlv,
52                                 libvlc_exception_t * p_e )
53 {
54     return libvlc_media_list_count( p_mlv->p_mlist, p_e );
55 }
56
57 /**************************************************************************
58  *       flat_media_list_view_item_at_index  (private)
59  * (called by flat_media_list_view_item_at_index)
60  **************************************************************************/
61 static libvlc_media_descriptor_t *
62 hierarch_media_list_view_item_at_index( libvlc_media_list_view_t * p_mlv,
63                                     int index,
64                                     libvlc_exception_t * p_e )
65 {
66     return libvlc_media_list_item_at_index( p_mlv->p_mlist, index, p_e );
67 }
68
69 /**************************************************************************
70  *       flat_media_list_view_item_at_index  (private)
71  * (called by flat_media_list_view_item_at_index)
72  **************************************************************************/
73 static libvlc_media_list_view_t *
74 hierarch_media_list_view_children_at_index( libvlc_media_list_view_t * p_mlv,
75                                         int index,
76                                         libvlc_exception_t * p_e )
77 {
78     libvlc_media_descriptor_t * p_md;
79     libvlc_media_list_t * p_submlist;
80     p_md = libvlc_media_list_item_at_index( p_mlv->p_mlist, index, p_e );
81     if( !p_md ) return NULL;
82     p_submlist = libvlc_media_descriptor_subitems( p_md, p_e );
83     if( !p_submlist ) return NULL;
84     return libvlc_media_list_hierarchical_view( p_submlist, p_e );
85 }
86
87 /**************************************************************************
88  *       media_list_(item|will)_* (private) (Event callback)
89  **************************************************************************/
90 static void
91 media_list_item_added( const libvlc_event_t * p_event, void * user_data )
92 {
93     libvlc_media_descriptor_t * p_md;
94     libvlc_media_list_view_t * p_mlv = user_data;
95     int index = p_event->u.media_list_item_added.index;
96     p_md = p_event->u.media_list_item_added.item;
97     libvlc_media_list_view_item_added( p_mlv, p_md, index );
98 }
99 static void
100 media_list_will_add_item( const libvlc_event_t * p_event, void * user_data )
101 {
102     libvlc_media_descriptor_t * p_md;
103     libvlc_media_list_view_t * p_mlv = user_data;
104     int index = p_event->u.media_list_will_add_item.index;
105     p_md = p_event->u.media_list_will_add_item.item;
106     libvlc_media_list_view_will_add_item( p_mlv, p_md, index );
107 }
108 static void
109 media_list_item_deleted( const libvlc_event_t * p_event, void * user_data )
110 {
111     libvlc_media_descriptor_t * p_md;
112     libvlc_media_list_view_t * p_mlv = user_data;
113     int index = p_event->u.media_list_item_deleted.index;
114     p_md = p_event->u.media_list_item_deleted.item;
115     libvlc_media_list_view_item_deleted( p_mlv, p_md, index );
116 }
117 static void
118 media_list_will_delete_item( const libvlc_event_t * p_event, void * user_data )
119 {
120     libvlc_media_descriptor_t * p_md;
121     libvlc_media_list_view_t * p_mlv = user_data;
122     int index = p_event->u.media_list_will_delete_item.index;
123     p_md = p_event->u.media_list_will_delete_item.item;
124     libvlc_media_list_view_will_delete_item( p_mlv, p_md, index );
125 }
126
127 /*
128  * Public libvlc functions
129  */
130
131
132 /**************************************************************************
133  *       flat_media_list_view_release (private)
134  * (called by media_list_view_release)
135  **************************************************************************/
136 static void
137 hierarch_media_list_view_release( libvlc_media_list_view_t * p_mlv )
138 {
139     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
140                          libvlc_MediaListItemAdded,
141                          media_list_item_added, p_mlv, NULL );
142     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
143                          libvlc_MediaListWillAddItem,
144                          media_list_will_add_item, p_mlv, NULL );
145     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
146                          libvlc_MediaListItemDeleted,
147                          media_list_item_deleted, p_mlv, NULL );
148     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
149                          libvlc_MediaListWillDeleteItem,
150                          media_list_will_delete_item, p_mlv, NULL );
151 }
152
153 /**************************************************************************
154  *       libvlc_media_list_flat_view (Public)
155  **************************************************************************/
156 libvlc_media_list_view_t *
157 libvlc_media_list_hierarchical_view( libvlc_media_list_t * p_mlist,
158                                      libvlc_exception_t * p_e )
159 {
160     trace("\n");
161     libvlc_media_list_view_t * p_mlv;
162     p_mlv = libvlc_media_list_view_new( p_mlist,
163                                         hierarch_media_list_view_count,
164                                         hierarch_media_list_view_item_at_index,
165                                         hierarch_media_list_view_children_at_index,
166                                         hierarch_media_list_view_release,
167                                         NULL,
168                                         p_e );
169     libvlc_media_list_lock( p_mlist );
170     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
171                          libvlc_MediaListItemAdded,
172                          media_list_item_added, p_mlv, NULL );
173     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
174                          libvlc_MediaListWillAddItem,
175                          media_list_will_add_item, p_mlv, NULL );
176     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
177                          libvlc_MediaListItemDeleted,
178                          media_list_item_deleted, p_mlv, NULL );
179     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
180                          libvlc_MediaListWillDeleteItem,
181                          media_list_will_delete_item, p_mlv, NULL );
182     libvlc_media_list_unlock( p_mlist );
183     return p_mlv;
184 }