modules/gui/skins2/parser/xmlparser.cpp

   1 /*****************************************************************************
   2  * xmlparser.cpp
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet     <asmax@via.ecp.fr>
   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 "xmlparser.hpp"
  25 #include "../src/os_factory.hpp"
  26 #include <vlc_url.h>
  27
  28 #ifdef HAVE_SYS_STAT_H
  29 #   include <sys/stat.h>
  30 #endif
  31
  32 XMLParser::XMLParser( intf_thread_t *pIntf, const string &rFileName,
  33                       bool useDTD ):
  34     SkinObject( pIntf )
  35 {
  36     m_pReader = NULL;
  37     m_pStream = NULL;
  38
  39     if( useDTD )
  40     {
  41         m_pXML = xml_Create( pIntf );
  42         if( m_pXML )
  43             LoadCatalog();
  44         else
  45             msg_Err( getIntf(), "DTD not supported" );
  46     }
  47     else
  48         m_pXML = NULL;
  49
  50     char* psz_uri = make_URI( rFileName.c_str(), NULL );
  51     m_pStream = stream_UrlNew( pIntf, psz_uri );
  52     free( psz_uri );
  53
  54     if( !m_pStream )
  55     {
  56         msg_Err( getIntf(), "failed to open %s for reading",
  57                  rFileName.c_str() );
  58         m_pReader = NULL;
  59         return;
  60     }
  61     m_pReader = xml_ReaderCreate( m_pXML, m_pStream );
  62     if( !m_pReader )
  63     {
  64         msg_Err( getIntf(), "failed to open %s for parsing",
  65                  rFileName.c_str() );
  66         return;
  67     }
  68
  69     if( m_pXML )
  70         xml_ReaderUseDTD( m_pReader );
  71 }
  72
  73
  74 XMLParser::~XMLParser()
  75 {
  76     if( m_pReader ) xml_ReaderDelete( m_pReader );
  77     if( m_pXML ) xml_Delete( m_pXML );
  78     if( m_pStream ) stream_Delete( m_pStream );
  79 }
  80
  81
  82 void XMLParser::LoadCatalog()
  83 {
  84     // Get the resource path and look for the DTD
  85     OSFactory *pOSFactory = OSFactory::instance( getIntf() );
  86     const list<string> &resPath = pOSFactory->getResourcePath();
  87     const string &sep = pOSFactory->getDirSeparator();
  88     list<string>::const_iterator it;
  89
  90 #ifdef HAVE_SYS_STAT_H
  91     struct stat statBuf;
  92
  93     // Try to load the catalog first (needed at least on win32 where
  94     // we don't have a default catalog)
  95     for( it = resPath.begin(); it != resPath.end(); it++ )
  96     {
  97         string catalog_path = (*it) + sep + "skin.catalog";
  98         if( !stat( catalog_path.c_str(), &statBuf ) )
  99         {
 100             msg_Dbg( getIntf(), "Using catalog %s", catalog_path.c_str() );
 101             xml_CatalogLoad( m_pXML, catalog_path.c_str() );
 102             break;
 103         }
 104     }
 105     if( it == resPath.end() )
 106     {
 107         // Ok, try the default one
 108         xml_CatalogLoad( m_pXML, 0 );
 109     }
 110
 111     for( it = resPath.begin(); it != resPath.end(); it++ )
 112     {
 113         string path = (*it) + sep + "skin.dtd";
 114         if( !stat( path.c_str(), &statBuf ) )
 115         {
 116             // DTD found
 117             msg_Dbg( getIntf(), "using DTD %s", path.c_str() );
 118
 119             // Add an entry in the default catalog
 120             xml_CatalogAdd( m_pXML, "public",
 121                             "-//VideoLAN//DTD VLC Skins V"
 122                             SKINS_DTD_VERSION "//EN", path.c_str() );
 123             break;
 124         }
 125     }
 126     if( it == resPath.end() )
 127     {
 128         msg_Err( getIntf(), "cannot find the skins DTD");
 129     }
 130 #endif
 131 }
 132
 133 bool XMLParser::parse()
 134 {
 135     if( !m_pReader ) return false;
 136
 137     m_errors = false;
 138
 139     int ret = xml_ReaderRead( m_pReader );
 140     while( ret == 1 )
 141     {
 142         if( m_errors ) return false;
 143
 144         // Get the node type
 145         int type = xml_ReaderNodeType( m_pReader );
 146         switch( type )
 147         {
 148             // Error
 149             case -1:
 150                 return false;
 151                 break;
 152
 153             case XML_READER_STARTELEM:
 154             {
 155                 // Read the element name
 156                 char *eltName = xml_ReaderName( m_pReader );
 157                 if( !eltName ) return false;
 158
 159                 // Read the attributes
 160                 AttrList_t attributes;
 161                 while( xml_ReaderNextAttr( m_pReader ) == VLC_SUCCESS )
 162                 {
 163                     char *name = xml_ReaderName( m_pReader );
 164                     char *value = xml_ReaderValue( m_pReader );
 165                     if( !name || !value )
 166                     {
 167                         free( name );
 168                         free( value );
 169                         return false;
 170                     }
 171                     attributes[name] = value;
 172                 }
 173
 174                 handleBeginElement( eltName, attributes );
 175                 free( eltName );
 176
 177                 map<const char*, const char*, ltstr> ::iterator it =
 178                     attributes.begin();
 179                 while( it != attributes.end() )
 180                 {
 181                     free( (char *)it->first );
 182                     free( (char *)it->second );
 183                     it++;
 184                 }
 185                 break;
 186             }
 187
 188             // End element
 189             case XML_READER_ENDELEM:
 190             {
 191                 // Read the element name
 192                 char *eltName = xml_ReaderName( m_pReader );
 193                 if( !eltName ) return false;
 194
 195                 handleEndElement( eltName );
 196                 free( eltName );
 197                 break;
 198             }
 199         }
 200         ret = xml_ReaderRead( m_pReader );
 201     }
 202     return (ret == 0 && !m_errors );
 203 }