git.sesse.net Git - vlc/blob - src/control/hierarchical_node_media_list_view.c

   1 /*****************************************************************************
   2  * hierarchical_node_media_list_view.c: libvlc hierarchical nodes media list
   3  * view functs.
   4  *****************************************************************************
   5  * Copyright (C) 2007 the VideoLAN team
   6  * $Id$
   7  *
   8  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/libvlc.h>
  30 #include <vlc/libvlc_media.h>
  31 #include <vlc/libvlc_media_list.h>
  32 #include <vlc/libvlc_media_list_view.h>
  33
  34 #include "media_internal.h" // Abuse, could ans should be removed
  35 #include "media_list_internal.h" // Abuse, could ans should be removed
  36 #include "media_list_view_internal.h"
  37
  38 /* FIXME: This version is probably a bit overheaded, and we may want to store
  39  * the items in a vlc_array_t to speed everything up */
  40
  41 //#define DEBUG_HIERARCHICAL_VIEW
  42
  43 #ifdef DEBUG_HIERARCHICAL_VIEW
  44 # define trace( fmt, ... ) printf( "[HIERARCHICAL_NODE] %s(): " fmt, __FUNCTION__, ##__VA_ARGS__ )
  45 #else
  46 # define trace( ... ) {}
  47 #endif
  48
  49 /*
  50  * Private functions
  51  */
  52
  53 /**************************************************************************
  54  *       flat_media_list_view_count  (private)
  55  * (called by media_list_view_count)
  56  **************************************************************************/
  57 static int
  58 hierarch_node_media_list_view_count( libvlc_media_list_view_t * p_mlv,
  59                                 libvlc_exception_t * p_e )
  60 {
  61     /* FIXME: we may want to cache that */
  62     int i, ret, count = libvlc_media_list_count( p_mlv->p_mlist );
  63     libvlc_media_t * p_md;
  64     libvlc_media_list_t * p_submlist;
  65     ret = 0;
  66     trace("\n");
  67     for( i = 0; i < count; i++ )
  68     {
  69         p_md = libvlc_media_list_item_at_index( p_mlv->p_mlist, i, p_e );
  70         if( !p_md ) continue;
  71         p_submlist = libvlc_media_subitems( p_md );
  72         if( !p_submlist ) continue;
  73         libvlc_media_release( p_md );
  74         libvlc_media_list_release( p_submlist );
  75         ret++;
  76     }
  77     return ret;
  78 }
  79
  80 /**************************************************************************
  81  *       flat_media_list_view_item_at_index  (private)
  82  * (called by flat_media_list_view_item_at_index)
  83  **************************************************************************/
  84 static libvlc_media_t *
  85 hierarch_node_media_list_view_item_at_index( libvlc_media_list_view_t * p_mlv,
  86                                         int index,
  87                                         libvlc_exception_t * p_e )
  88 {
  89     /* FIXME: we may want to cache that */
  90     libvlc_media_t * p_md;
  91     libvlc_media_list_t * p_submlist;
  92     trace("%d\n", index);
  93     int i, current_index, count = libvlc_media_list_count( p_mlv->p_mlist );
  94     current_index = -1;
  95     for( i = 0; i < count; i++ )
  96     {
  97         p_md = libvlc_media_list_item_at_index( p_mlv->p_mlist, i, p_e );
  98         if( !p_md ) continue;
  99         p_submlist = libvlc_media_subitems( p_md );
 100         if( !p_submlist ) continue;
 101         libvlc_media_list_release( p_submlist );
 102         current_index++;
 103         if( current_index == index )
 104             return p_md;
 105         libvlc_media_release( p_md );
 106     }
 107
 108     libvlc_exception_raise( p_e );
 109     libvlc_printerr( "Index out of bound in Media List View" );
 110     return NULL;
 111 }
 112
 113 /**************************************************************************
 114  *       flat_media_list_view_item_at_index  (private)
 115  * (called by flat_media_list_view_item_at_index)
 116  **************************************************************************/
 117 static libvlc_media_list_view_t *
 118 hierarch_node_media_list_view_children_at_index( libvlc_media_list_view_t * p_mlv,
 119                                             int index,
 120                                             libvlc_exception_t * p_e )
 121 {
 122     libvlc_media_t * p_md;
 123     libvlc_media_list_t * p_submlist;
 124     libvlc_media_list_view_t * p_ret;
 125     p_md = hierarch_node_media_list_view_item_at_index( p_mlv, index, p_e );
 126     if( !p_md ) return NULL;
 127     p_submlist = libvlc_media_subitems( p_md );
 128     libvlc_media_release( p_md );
 129     if( !p_submlist ) return NULL;
 130     p_ret = libvlc_media_list_hierarchical_node_view( p_submlist, p_e );
 131     libvlc_media_list_release( p_submlist );
 132
 133     return p_ret;
 134 }
 135
 136 /* Helper */
 137 static int
 138 index_of_item( libvlc_media_list_view_t * p_mlv, libvlc_media_t * p_md )
 139 {
 140     libvlc_media_t * p_iter_md;
 141     libvlc_media_list_t * p_submlist;
 142
 143     int i, current_index, count = libvlc_media_list_count( p_mlv->p_mlist );
 144     current_index = -1;
 145     for( i = 0; i < count; i++ )
 146     {
 147         p_iter_md = libvlc_media_list_item_at_index( p_mlv->p_mlist, i, NULL );
 148         if( !p_iter_md ) continue;
 149         p_submlist = libvlc_media_subitems( p_iter_md );
 150         if( !p_submlist ) continue;
 151         libvlc_media_list_release( p_submlist );
 152         libvlc_media_release( p_iter_md );
 153         current_index++;
 154         if( p_md == p_iter_md )
 155             return current_index;
 156     }
 157     return -1;
 158 }
 159
 160 static bool
 161 item_is_already_added( libvlc_media_t * p_md )
 162 {
 163     libvlc_media_list_t * p_submlist;
 164
 165     p_submlist = libvlc_media_subitems( p_md );
 166     if( !p_submlist ) return false;
 167     int count = libvlc_media_list_count( p_submlist );
 168     libvlc_media_list_release( p_submlist );
 169     return count > 1;
 170 }
 171
 172
 173 /**************************************************************************
 174  *       media_list_(item|will)_* (private) (Event callback)
 175  **************************************************************************/
 176 static void
 177 items_subitems_added( const libvlc_event_t * p_event, void * user_data )
 178 {
 179     libvlc_media_t * p_md;
 180     libvlc_media_list_view_t * p_mlv = user_data;
 181     int index;
 182     p_md = p_event->p_obj;
 183     if( !item_is_already_added( p_md ) )
 184     {
 185         index = index_of_item( p_mlv, p_md );
 186         trace("%d\n", index);
 187         if( index >= 0 )
 188         {
 189             libvlc_media_list_view_will_add_item( p_mlv, p_md, index );
 190             libvlc_media_list_view_item_added( p_mlv, p_md, index );
 191         }
 192     }
 193     else
 194     {
 195         trace("item already added\n");
 196     }
 197 }
 198
 199 static void
 200 media_list_item_added( const libvlc_event_t * p_event, void * user_data )
 201 {
 202     libvlc_media_t * p_md;
 203     libvlc_media_list_view_t * p_mlv = user_data;
 204     int index;
 205     p_md = p_event->u.media_list_item_added.item;
 206     index = index_of_item( p_mlv, p_md );
 207     trace("%d\n", index);
 208     if( index >= 0)
 209         libvlc_media_list_view_item_added( p_mlv, p_md, index );
 210     libvlc_event_attach( p_md->p_event_manager, libvlc_MediaSubItemAdded,
 211                          items_subitems_added, p_mlv );
 212
 213 }
 214 static void
 215 media_list_will_add_item( const libvlc_event_t * p_event, void * user_data )
 216 {
 217     libvlc_media_t * p_md;
 218     libvlc_media_list_view_t * p_mlv = user_data;
 219     int index;
 220     p_md = p_event->u.media_list_will_add_item.item;
 221     index = index_of_item( p_mlv, p_md );
 222     trace("%d\n", index);
 223     if( index >= 0)
 224         libvlc_media_list_view_will_add_item( p_mlv, p_md, index );
 225 }
 226 static void
 227 media_list_item_deleted( const libvlc_event_t * p_event, void * user_data )
 228 {
 229     libvlc_media_t * p_md;
 230     libvlc_media_list_view_t * p_mlv = user_data;
 231     int index;
 232     p_md = p_event->u.media_list_item_deleted.item;
 233     index = index_of_item( p_mlv, p_md );
 234     trace("%d\n", index);
 235     if( index >= 0)
 236         libvlc_media_list_view_item_deleted( p_mlv, p_md, index );
 237     libvlc_event_detach( p_md->p_event_manager, libvlc_MediaSubItemAdded,
 238                          items_subitems_added, p_mlv );
 239 }
 240 static void
 241 media_list_will_delete_item( const libvlc_event_t * p_event, void * user_data )
 242 {
 243     libvlc_media_t * p_md;
 244     libvlc_media_list_view_t * p_mlv = user_data;
 245     int index;
 246     p_md = p_event->u.media_list_will_delete_item.item;
 247     index = index_of_item( p_mlv, p_md );
 248     trace("%d\n", index);
 249     if( index >= 0)
 250         libvlc_media_list_view_will_delete_item( p_mlv, p_md, index );
 251 }
 252
 253
 254 /*
 255  * Public libvlc functions
 256  */
 257
 258
 259 /**************************************************************************
 260  *       flat_media_list_view_release (private)
 261  * (called by media_list_view_release)
 262  **************************************************************************/
 263 static void
 264 hierarch_node_media_list_view_release( libvlc_media_list_view_t * p_mlv )
 265 {
 266     trace("\n");
 267     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
 268                          libvlc_MediaListItemAdded,
 269                          media_list_item_added, p_mlv );
 270     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
 271                          libvlc_MediaListWillAddItem,
 272                          media_list_will_add_item, p_mlv );
 273     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
 274                          libvlc_MediaListItemDeleted,
 275                          media_list_item_deleted, p_mlv );
 276     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
 277                          libvlc_MediaListWillDeleteItem,
 278                          media_list_will_delete_item, p_mlv );
 279 }
 280
 281 /**************************************************************************
 282  *       libvlc_media_list_flat_view (Public)
 283  **************************************************************************/
 284 libvlc_media_list_view_t *
 285 libvlc_media_list_hierarchical_node_view( libvlc_media_list_t * p_mlist,
 286                                      libvlc_exception_t * p_e )
 287 {
 288     trace("\n");
 289     libvlc_media_list_view_t * p_mlv;
 290     p_mlv = libvlc_media_list_view_new( p_mlist,
 291                                         hierarch_node_media_list_view_count,
 292                                         hierarch_node_media_list_view_item_at_index,
 293                                         hierarch_node_media_list_view_children_at_index,
 294                                         libvlc_media_list_hierarchical_node_view,
 295                                         hierarch_node_media_list_view_release,
 296                                         NULL,
 297                                         p_e );
 298     libvlc_media_list_lock( p_mlist );
 299     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
 300                          libvlc_MediaListItemAdded,
 301                          media_list_item_added, p_mlv );
 302     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
 303                          libvlc_MediaListWillAddItem,
 304                          media_list_will_add_item, p_mlv );
 305     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
 306                          libvlc_MediaListItemDeleted,
 307                          media_list_item_deleted, p_mlv );
 308     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
 309                          libvlc_MediaListWillDeleteItem,
 310                          media_list_will_delete_item, p_mlv );
 311     libvlc_media_list_unlock( p_mlist );
 312     return p_mlv;
 313 }