* demux/playlist/xspf: skeleton for XSPF tree playlist import

modules/demux/playlist/xspf.c

 /*******************************************************************************
- * Copyright (C) 2006 Daniel Stränger <vlc at schmaller dot de>
+ * xspf.c : XSPF playlist import functions
+ *******************************************************************************
+ * Copyright (C) 2006 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Daniel Stränger <vlc at schmaller dot de>
+ *          Yoann Peronneau <yoann@videolan.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -33,6 +39,8 @@ struct demux_sys_t
 {
     playlist_item_t *p_item_in_category;
     int i_parent_id;
+    input_item_t **pp_tracklist;
+    int i_tracklist_entries;
 };
 
 /**
@@ -76,6 +84,8 @@ int xspf_import_Demux( demux_t *p_demux )
     INIT_PLAYLIST_STUFF;
     p_demux->p_sys->p_item_in_category = p_item_in_category;
     p_demux->p_sys->i_parent_id = i_parent_id;
+    p_demux->p_sys->pp_tracklist = NULL;
+    p_demux->p_sys->i_tracklist_entries = 0;
 
     /* create new xml parser from stream */
     p_xml = xml_Create( p_demux );
@@ -161,7 +171,7 @@ static vlc_bool_t parse_playlist_node COMPLEX_INTERFACE
           {"attribution",  COMPLEX_CONTENT, {.cmplx = skip_element} },
           {"link",         SIMPLE_CONTENT,  {NULL} },
           {"meta",         SIMPLE_CONTENT,  {NULL} },
-          {"extension",    COMPLEX_CONTENT, {.cmplx = skip_element} },
+          {"extension",    COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
           {"trackList",    COMPLEX_CONTENT, {.cmplx = parse_tracklist_node} },
           {NULL,           UNKNOWN_CONTENT, {NULL} }
         };
@@ -474,10 +484,14 @@ static vlc_bool_t parse_track_node COMPLEX_INTERFACE
                 {
                     FREE_ATT();
                     /* Add it */
-                    playlist_AddWhereverNeeded( p_playlist, p_new_input,
+                    /*playlist_AddWhereverNeeded( p_playlist, p_new_input,
                               p_item, p_demux->p_sys->p_item_in_category,
                               (p_demux->p_sys->i_parent_id >0 ) ? VLC_TRUE:
-                              VLC_FALSE, PLAYLIST_APPEND );
+                              VLC_FALSE, PLAYLIST_APPEND );*/
+                    INSERT_ELEM( p_demux->p_sys->pp_tracklist,
+                                 p_demux->p_sys->i_tracklist_entries,
+                                 p_demux->p_sys->i_tracklist_entries,
+                                 p_new_input );
                     return VLC_TRUE;
                 }
                 /* there MUST have been a start tag for that element name */
@@ -521,6 +535,9 @@ static vlc_bool_t parse_track_node COMPLEX_INTERFACE
                         return VLC_FALSE;
                     }
                 }
+                else if( !strcmp( p_handler->name, "identifier" ) )
+                {
+                }
                 else
                 {
                     /* there MUST be an item */
@@ -594,6 +611,224 @@ static vlc_bool_t set_item_info SIMPLE_INTERFACE
     return VLC_TRUE;
 }
 
+
+/**
+ * \brief parse the extension node of a XSPF playlist
+ */
+static vlc_bool_t parse_extension_node COMPLEX_INTERFACE
+{
+    char *psz_name = NULL;
+    char *psz_value = NULL;
+    int i_node;
+    xml_elem_hnd_t *p_handler = NULL;
+
+    xml_elem_hnd_t pl_elements[] =
+        { {"title", SIMPLE_CONTENT,  {.cmplx = skip_element} },
+          {"node",  COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
+          {"item",  COMPLEX_CONTENT, {.cmplx = parse_extitem_node} },
+          {NULL,    UNKNOWN_CONTENT, {NULL} }
+        };
+
+    fprintf( stderr, "  <node>\n" );
+
+    /* parse the child elements */
+    while( xml_ReaderRead( p_xml_reader ) == 1 )
+    {
+        i_node = xml_ReaderNodeType( p_xml_reader );
+        switch( i_node )
+        {
+            case XML_READER_NONE:
+                break;
+            case XML_READER_STARTELEM:
+                /*  element start tag  */
+                psz_name = xml_ReaderName( p_xml_reader );
+                if( !psz_name || !*psz_name )
+                {
+                    msg_Err( p_demux, "invalid xml stream" );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+                /* choose handler */
+                for( p_handler = pl_elements;
+                     p_handler->name && strcmp( psz_name, p_handler->name );
+                     p_handler++ );
+                if( !p_handler->name )
+                {
+                    msg_Err( p_demux, "unexpected element <%s>", psz_name );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+                FREE_NAME();
+                /* complex content is parsed in a separate function */
+                if( p_handler->type == COMPLEX_CONTENT )
+                {
+                    if( p_handler->pf_handler.cmplx( p_demux,
+                                                     p_playlist,
+                                                     p_item, NULL,
+                                                     p_xml_reader,
+                                                     p_handler->name ) )
+                    {
+                        p_handler = NULL;
+                        FREE_ATT();
+                    }
+                    else
+                    {
+                        FREE_ATT();
+                        return VLC_FALSE;
+                    }
+                }
+                break;
+
+            case XML_READER_TEXT:
+                /* simple element content */
+                FREE_ATT();
+                psz_value = xml_ReaderValue( p_xml_reader );
+                if( !psz_value )
+                {
+                    msg_Err( p_demux, "invalid xml stream" );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+                break;
+
+            case XML_READER_ENDELEM:
+                /* element end tag */
+                psz_name = xml_ReaderName( p_xml_reader );
+                if( !psz_name )
+                {
+                    msg_Err( p_demux, "invalid xml stream" );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+                /* leave if the current parent node is terminated */
+                if( !strcmp( psz_name, psz_element ) )
+                {
+                    fprintf( stderr, "  </node>\n" );
+                    FREE_ATT();
+                    return VLC_TRUE;
+                }
+                /* there MUST have been a start tag for that element name */
+                if( !p_handler || !p_handler->name
+                    || strcmp( p_handler->name, psz_name ))
+                {
+                    msg_Err( p_demux, "there's no open element left for <%s>",
+                             psz_name );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+
+                if( p_handler->pf_handler.smpl )
+                {
+                    p_handler->pf_handler.smpl( p_item, NULL, p_handler->name,
+                                                psz_value );
+                }
+                FREE_ATT();
+                p_handler = NULL;
+                break;
+
+            default:
+                /* unknown/unexpected xml node */
+                msg_Err( p_demux, "unexpected xml node %i", i_node );
+                FREE_ATT();
+                return VLC_FALSE;
+        }
+        FREE_NAME();
+    }
+    return VLC_FALSE;
+}
+
+/**
+ * \brief parse the extension item node of a XSPF playlist
+ */
+static vlc_bool_t parse_extitem_node COMPLEX_INTERFACE
+{
+    char *psz_name = NULL;
+    char *psz_value = NULL;
+    int i_node;
+    int i_href = -1;
+
+    /* read all playlist attributes */
+    while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
+    {
+        psz_name = xml_ReaderName( p_xml_reader );
+        psz_value = xml_ReaderValue( p_xml_reader );
+        if( !psz_name || !psz_value )
+        {
+            msg_Err( p_demux, "invalid xml stream @ <item>" );
+            FREE_ATT();
+            return VLC_FALSE;
+        }
+        /* attribute: href */
+        if( !strcmp( psz_name, "href" ) )
+        {
+            i_href = atoi( psz_value );
+        }
+        /* unknown attribute */
+        else
+            msg_Warn( p_demux, "invalid <item> attribute:\"%s\"", psz_name);
+
+        FREE_ATT();
+    }
+
+    /* attribute href is mandatory */
+    if( i_href < 0 )
+    {
+        msg_Warn( p_demux, "<item> requires \"href\" attribute" );
+        return VLC_FALSE;
+    }
+
+    if( i_href > p_demux->p_sys->i_tracklist_entries )
+    {
+        msg_Warn( p_demux, "invalid \"href\" attribute" );
+        return VLC_FALSE;
+    }
+
+    fprintf( stderr, "    %s\n", p_demux->p_sys->pp_tracklist[i_href]->psz_name );
+
+    /* parse the child elements */
+    while( xml_ReaderRead( p_xml_reader ) == 1 )
+    {
+        i_node = xml_ReaderNodeType( p_xml_reader );
+        switch( i_node )
+        {
+            case XML_READER_NONE:
+                break;
+            case XML_READER_STARTELEM:
+                /*  element start tag  */
+            case XML_READER_TEXT:
+                /* simple element content */
+                msg_Err( p_demux, "invalid xml stream" );
+                return VLC_FALSE;
+
+            case XML_READER_ENDELEM:
+                /* element end tag */
+                psz_name = xml_ReaderName( p_xml_reader );
+                if( !psz_name )
+                {
+                    msg_Err( p_demux, "invalid xml stream" );
+                    FREE_ATT();
+                    return VLC_FALSE;
+                }
+                /* leave if the current parent node is terminated */
+                if( !strcmp( psz_name, psz_element ) )
+                {
+                    FREE_ATT();
+                    return VLC_TRUE;
+                }
+                FREE_ATT();
+                break;
+
+            default:
+                /* unknown/unexpected xml node */
+                msg_Err( p_demux, "unexpected xml node %i", i_node );
+                FREE_ATT();
+                return VLC_FALSE;
+        }
+        FREE_NAME();
+    }
+    return VLC_FALSE;
+}
+
 /**
  * \brief skips complex element content that we can't manage
  */

modules/demux/playlist/xspf.h

@@ -47,6 +47,8 @@ int xspf_import_Control( demux_t *, int, va_list );
 static vlc_bool_t parse_playlist_node COMPLEX_INTERFACE;
 static vlc_bool_t parse_tracklist_node COMPLEX_INTERFACE;
 static vlc_bool_t parse_track_node COMPLEX_INTERFACE;
+static vlc_bool_t parse_extension_node COMPLEX_INTERFACE;
+static vlc_bool_t parse_extitem_node COMPLEX_INTERFACE;
 static vlc_bool_t set_item_info SIMPLE_INTERFACE;
 static vlc_bool_t skip_element COMPLEX_INTERFACE;
 static vlc_bool_t insert_new_item( playlist_t *, playlist_item_t *, playlist_item_t **, char *);