src/playlist/search.c

   1 /*****************************************************************************
   2  * search.c : Search functions
   3  *****************************************************************************
   4  * Copyright (C) 1999-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@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 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26 #include <assert.h>
  27
  28 #include <vlc_common.h>
  29 #include "vlc_playlist.h"
  30 #include "playlist_internal.h"
  31
  32 /***************************************************************************
  33  * Item search functions
  34  ***************************************************************************/
  35
  36 /**
  37  * Search a playlist item by its playlist_item id.
  38  * The playlist have to be locked
  39  * @param p_playlist: the playlist
  40  * @param i_id: the id to find
  41  * @return the item or NULL on failure
  42  */
  43 playlist_item_t* playlist_ItemGetById( playlist_t * p_playlist , int i_id )
  44 {
  45     int i;
  46     PL_ASSERT_LOCKED;
  47     ARRAY_BSEARCH( p_playlist->all_items,->i_id, int, i_id, i );
  48     if( i != -1 )
  49         return ARRAY_VAL( p_playlist->all_items, i );
  50     else
  51         return NULL;
  52 }
  53
  54 /**
  55  * Search an item by its input_item_t
  56  * The playlist have to be locked
  57  * @param p_playlist: the playlist
  58  * @param p_item: the input_item_t to find
  59  * @return the item, or NULL on failure
  60  */
  61 playlist_item_t* playlist_ItemGetByInput( playlist_t * p_playlist,
  62                                           input_item_t *p_item )
  63 {
  64     int i;
  65     PL_ASSERT_LOCKED;
  66     if( get_current_status_item( p_playlist ) &&
  67         get_current_status_item( p_playlist )->p_input == p_item )
  68     {
  69         return get_current_status_item( p_playlist );
  70     }
  71     /** \todo Check if this is always incremental and whether we can bsearch */
  72     for( i =  0 ; i < p_playlist->all_items.i_size; i++ )
  73     {
  74         if( ARRAY_VAL(p_playlist->all_items, i)->p_input == p_item )
  75         {
  76             return ARRAY_VAL(p_playlist->all_items, i);
  77         }
  78     }
  79     return NULL;
  80 }
  81
  82
  83 /***************************************************************************
  84  * Live search handling
  85  ***************************************************************************/
  86
  87 /**
  88  * Enable all items in the playlist
  89  * @param p_root: the current root item
  90  */
  91 static void playlist_LiveSearchClean( playlist_item_t *p_root )
  92 {
  93     for( int i = 0; i < p_root->i_children; i++ )
  94     {
  95         playlist_item_t *p_item = p_root->pp_children[i];
  96         if( p_item->i_children >= 0 )
  97             playlist_LiveSearchClean( p_item );
  98         p_item->i_flags &= ~PLAYLIST_DBL_FLAG;
  99     }
 100 }
 101
 102
 103 /**
 104  * Enable/Disable items in the playlist according to the search argument
 105  * @param p_root: the current root item
 106  * @param psz_string: the string to search
 107  * @return true if an item match
 108  */
 109 static bool playlist_LiveSearchUpdateInternal( playlist_item_t *p_root,
 110                                                const char *psz_string )
 111 {
 112     int i;
 113     bool b_match = false;
 114     for( i = 0 ; i < p_root->i_children ; i ++ )
 115     {
 116         bool b_enable = false;
 117         playlist_item_t *p_item = p_root->pp_children[i];
 118         // Go recurssively if their is some children
 119         if( p_item->i_children >= 0 &&
 120             playlist_LiveSearchUpdateInternal( p_item, psz_string ) )
 121         {
 122             b_enable = true;
 123         }
 124
 125         if( !b_enable )
 126         {
 127             vlc_mutex_lock( &p_item->p_input->lock );
 128             // Do we have some meta ?
 129             if( p_item->p_input->p_meta )
 130             {
 131                 // Use Title or fall back to psz_name
 132                 const char *psz_title = vlc_meta_Get( p_item->p_input->p_meta, vlc_meta_Title );
 133                 if( !psz_title )
 134                     psz_title = p_item->p_input->psz_name;
 135                 const char *psz_album = vlc_meta_Get( p_item->p_input->p_meta, vlc_meta_Album );
 136                 const char *psz_artist = vlc_meta_Get( p_item->p_input->p_meta, vlc_meta_Artist );
 137                 b_enable = ( psz_title && strcasestr( psz_title, psz_string ) ) ||
 138                            ( psz_album && strcasestr( psz_album, psz_string ) ) ||
 139                            ( psz_artist && strcasestr( psz_artist, psz_string ) );
 140             }
 141             else
 142                 b_enable = p_item->p_input->psz_name && strcasestr( p_item->p_input->psz_name, psz_string );
 143             vlc_mutex_unlock( &p_item->p_input->lock );
 144         }
 145
 146         if( b_enable )
 147             p_item->i_flags &= ~PLAYLIST_DBL_FLAG;
 148         else
 149             p_item->i_flags |= PLAYLIST_DBL_FLAG;
 150
 151         b_match |= b_enable;
 152    }
 153    return b_match;
 154 }
 155
 156
 157
 158 /**
 159  * Launch the recursive search in the playlist
 160  * @param p_playlist: the playlist
 161  * @param p_root: the current root item
 162  * @param psz_string: the string to find
 163  * @return VLC_SUCCESS
 164  */
 165 int playlist_LiveSearchUpdate( playlist_t *p_playlist, playlist_item_t *p_root,
 166                                const char *psz_string )
 167 {
 168     PL_ASSERT_LOCKED;
 169     pl_priv(p_playlist)->b_reset_currently_playing = true;
 170     if( *psz_string )
 171         playlist_LiveSearchUpdateInternal( p_root, psz_string );
 172     else
 173         playlist_LiveSearchClean( p_root );
 174     vlc_cond_signal( &pl_priv(p_playlist)->signal );
 175     return VLC_SUCCESS;
 176 }
 177