/* This file is (c) 2008-2011 Konstantin Isakov <ikm@goldendict.org>
 * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */

#include "config.hh"
#include <QDir>
#include <QFile>
#include <QtXml>
#include "dprintf.hh"

#ifdef _MSC_VER
#include <stdint_msvc.h>
#else
#include <stdint.h>
#endif

#ifdef Q_OS_WIN32
#include "shlobj.h"
#endif

#include "atomic_rename.hh"

namespace Config {

namespace
{
  QDir getHomeDir()
  {
    if ( isPortableVersion() )
      return QDir( QCoreApplication::applicationDirPath() + "/portable" );

    QDir result;

    result = QDir::home();
    #ifdef Q_OS_WIN32
      if ( result.cd( "Application Data/GoldenDict" ) )
        return result;
      char const * pathInHome = "GoldenDict";
      result = QDir::fromNativeSeparators( QString::fromWCharArray( _wgetenv( L"APPDATA" ) ) );
    #else
      char const * pathInHome = ".goldendict";
    #endif

    result.mkpath( pathInHome );

    if ( !result.cd( pathInHome ) )
      throw exCantUseHomeDir();

    return result;
  }

  QString getConfigFileName()
  {
    return getHomeDir().absoluteFilePath( "config" );
  }
}

ProxyServer::ProxyServer(): enabled( false ), type( Socks5 ), port( 3128 )
{
}

HotKey::HotKey(): modifiers( 0 ), key1( 0 ), key2( 0 )
{
}

// Does anyone know how to separate modifiers from the keycode? We'll
// use our own mask.

uint32_t const keyMask = 0x01FFFFFF;

HotKey::HotKey( QKeySequence const & seq ):
  modifiers( seq[ 0 ] & ~keyMask ),
  key1( seq[ 0 ] & keyMask ),
  key2( seq[ 1 ] & keyMask )
{
}

QKeySequence HotKey::toKeySequence() const
{
  int v2 = key2 ? ( key2 | modifiers ): 0;

  return QKeySequence( key1 | modifiers, v2 );
}

Preferences::Preferences():
  newTabsOpenAfterCurrentOne( false ),
  newTabsOpenInBackground( true ),
  hideSingleTab( false ),
  hideMenubar( false ),
  enableTrayIcon( true ),
  startToTray( false ),
  closeToTray( true ),
  autoStart( false ),
  doubleClickTranslates( true ),
  escKeyHidesMainWindow( false ),

  enableMainWindowHotkey( true ),
  mainWindowHotkey( QKeySequence( "Ctrl+F11,F11" ) ),
  enableClipboardHotkey( true ),
  clipboardHotkey( QKeySequence( "Ctrl+C,C" ) ),

  enableScanPopup( true ),
  startWithScanPopupOn( false ),
  enableScanPopupModifiers( false ),
  scanPopupModifiers( 0 ),
  scanPopupAltMode( false ),
  scanPopupAltModeSecs( 3 ),
  scanPopupUseUIAutomation( true ),
  scanPopupUseIAccessibleEx( true ),
  scanPopupUseGDMessage( true ),
  pronounceOnLoadMain( false ),
  pronounceOnLoadPopup( false ),
#ifdef Q_WS_WIN
  useExternalPlayer( false ),
  useWindowsPlaySound( true ),
#else
  useExternalPlayer( true ), // Phonon on Linux still feels quite buggy
  useWindowsPlaySound( false ),
#endif
  checkForNewReleases( true ),
  disallowContentFromOtherSites( false ),
  enableWebPlugins( false ),
  zoomFactor( 1 ),
  wordsZoomLevel( 0 )
{
}

Romaji::Romaji():
  enable( false ),
  enableHepburn( true ),
  enableNihonShiki( false ),
  enableKunreiShiki( false ),
  enableHiragana( true ),
  enableKatakana( true )
{
}

void Events::signalMutedDictionariesChanged()
{
  emit mutedDictionariesChanged();
}

namespace {

MediaWikis makeDefaultMediaWikis( bool enable )
{
  MediaWikis mw;

  mw.push_back( MediaWiki( "ae6f89aac7151829681b85f035d54e48", "English Wikipedia", "http://en.wikipedia.org/w", enable ) );
  mw.push_back( MediaWiki( "affcf9678e7bfe701c9b071f97eccba3", "English Wiktionary", "http://en.wiktionary.org/w", false ) );
  mw.push_back( MediaWiki( "8e0c1c2b6821dab8bdba8eb869ca7176", "Russian Wikipedia", "http://ru.wikipedia.org/w", false ) );
  mw.push_back( MediaWiki( "b09947600ae3902654f8ad4567ae8567", "Russian Wiktionary", "http://ru.wiktionary.org/w", false ) );
  mw.push_back( MediaWiki( "a8a66331a1242ca2aeb0b4aed361c41d", "German Wikipedia", "http://de.wikipedia.org/w", false ) );
  mw.push_back( MediaWiki( "21c64bca5ec10ba17ff19f3066bc962a", "German Wiktionary", "http://de.wiktionary.org/w", false ) );
  mw.push_back( MediaWiki( "96957cb2ad73a20c7a1d561fc83c253a", "Portuguese Wikipedia", "http://pt.wikipedia.org/w", false ) );
  mw.push_back( MediaWiki( "ed4c3929196afdd93cc08b9a903aad6a", "Portuguese Wiktionary", "http://pt.wiktionary.org/w", false ) );

  return mw;
}

WebSites makeDefaultWebSites()
{
  WebSites ws;

  ws.push_back( WebSite( "b88cb2898e634c6638df618528284c2d", "Google En-En (Oxford)", "http://www.google.com/dictionary?aq=f&langpair=en|en&q=%GDWORD%&hl=en", false ) );
  ws.push_back( WebSite( "f376365a0de651fd7505e7e5e683aa45", "Urban Dictionary", "http://www.urbandictionary.com/define.php?term=%GDWORD%", false ) );
  ws.push_back( WebSite( "324ca0306187df7511b26d3847f4b07c", "Multitran (En)", "http://multitran.ru/c/m.exe?CL=1&l1=1&s=%GD1251%", false ) );
  ws.push_back( WebSite( "924db471b105299c82892067c0f10787", "Lingvo (En-Ru)", "http://lingvopro.abbyyonline.com/en/Search/en-ru/%GDWORD%", false ) );
  ws.push_back( WebSite( "087a6d65615fb047f4c80eef0a9465db", "Michaelis (Pt-En)", "http://michaelis.uol.com.br/moderno/ingles/index.php?lingua=portugues-ingles&palavra=%GDISO1%", false ) );

  return ws;
}

Programs makeDefaultPrograms()
{
  Programs programs;

  // The following list doesn't make a lot of sense under Windows
#ifndef Q_WS_WIN
  programs.push_back( Program( false, Program::Audio, "428b4c2b905ef568a43d9a16f59559b0", "Festival", "festival --tts" ) );
  programs.push_back( Program( false, Program::Audio, "2cf8b3a60f27e1ac812de0b57c148340", "Espeak", "espeak %GDWORD%" ) );
  programs.push_back( Program( false, Program::Html, "4f898f7582596cea518c6b0bfdceb8b3", "Manpages", "man -a --html=/bin/cat %GDWORD%" ) );
#endif

  return programs;
}

/// Sets option to true of false if node is "1" or "0" respectively, or leaves
/// it intact if it's neither "1" nor "0".
void applyBoolOption( bool & option, QDomNode const & node )
{
  QString value = node.toElement().text();

  if ( value == "1" )
    option = true;
  else
  if ( value == "0" )
    option = false;
}

Group loadGroup( QDomElement grp, unsigned * nextId = 0 )
{
  Group g;

  if ( grp.hasAttribute( "id" ) )
    g.id = grp.attribute( "id" ).toUInt();
  else
    g.id = nextId ? (*nextId)++ : 0;

  g.name = grp.attribute( "name" );
  g.icon = grp.attribute( "icon" );

  if ( !grp.attribute( "iconData" ).isEmpty() )
    g.iconData = QByteArray::fromBase64( grp.attribute( "iconData" ).toAscii() );

  if ( !grp.attribute( "shortcut" ).isEmpty() )
    g.shortcut = QKeySequence::fromString( grp.attribute( "shortcut" ) );

  QDomNodeList dicts = grp.elementsByTagName( "dictionary" );

  for( unsigned y = 0; y < dicts.length(); ++y )
    g.dictionaries.push_back( DictionaryRef( dicts.item( y ).toElement().text(),
                                             dicts.item( y ).toElement().attribute( "name" ) ) );

  return g;
}

MutedDictionaries loadMutedDictionaries( QDomNode mutedDictionaries )
{
  MutedDictionaries result;

  if ( !mutedDictionaries.isNull() )
  {
    QDomNodeList nl = mutedDictionaries.toElement().
                        elementsByTagName( "mutedDictionary" );

    for( unsigned x = 0; x < nl.length(); ++x )
      result.insert( nl.item( x ).toElement().text() );
  }

  return result;
}

void saveMutedDictionaries( QDomDocument & dd, QDomElement & muted,
                            MutedDictionaries const & mutedDictionaries )
{
  for( MutedDictionaries::const_iterator i = mutedDictionaries.begin();
       i != mutedDictionaries.end(); ++i )
  {
    QDomElement dict = dd.createElement( "mutedDictionary" );
    muted.appendChild( dict );

    QDomText value = dd.createTextNode( *i );
    dict.appendChild( value );
  }
}

}

Class load() throw( exError )
{
  QString configName  = getConfigFileName();

  bool loadFromTemplate = false;

  if ( !QFile::exists( configName ) )
  {
    // Make the default config, save it and return it
    Class c;

    #ifdef Q_OS_LINUX
    if ( QDir( "/usr/share/stardict/dic" ).exists() )
      c.paths.push_back( Path( "/usr/share/stardict/dic", true ) );

    if ( QDir( "/usr/share/dictd" ).exists() )
      c.paths.push_back( Path( "/usr/share/dictd", true ) );

    if ( QDir( "/usr/share/WyabdcRealPeopleTTS" ).exists() )
      c.soundDirs.push_back( SoundDir( "/usr/share/WyabdcRealPeopleTTS", "WyabdcRealPeopleTTS" ) );

    if ( QDir( "/usr/share/myspell/dicts" ).exists() )
      c.hunspell.dictionariesPath = "/usr/share/myspell/dicts";

    #endif

    #ifdef Q_OS_WIN32

    // get path to Program Files
    wchar_t buf[ MAX_PATH ];
    SHGetFolderPathW( NULL, CSIDL_PROGRAM_FILES, NULL, 0, buf );
    QString pathToProgramFiles = QString::fromWCharArray( buf );
    if ( pathToProgramFiles.isEmpty() )
      pathToProgramFiles = "C:\\Program Files";

    if ( QDir( pathToProgramFiles + "\\StarDict\\dic" ).exists() )
      c.paths.push_back( Path( pathToProgramFiles + "\\StarDict\\dic", true ) );

    if ( QDir( pathToProgramFiles + "\\StarDict\\WyabdcRealPeopleTTS" ).exists() )
      c.soundDirs.push_back( SoundDir( pathToProgramFiles + "\\StarDict\\WyabdcRealPeopleTTS", "WyabdcRealPeopleTTS" ) );
    else
    if ( QDir( pathToProgramFiles + "\\WyabdcRealPeopleTTS" ).exists() )
      c.soundDirs.push_back( SoundDir( pathToProgramFiles + "\\WyabdcRealPeopleTTS", "WyabdcRealPeopleTTS" ) );

    // #### "C:/Program Files" is bad! will not work for German Windows etc.
    // #### should be replaced to system path

//    if ( QDir( "C:/Program Files/StarDict/dic" ).exists() )
//      c.paths.push_back( Path( "C:/Program Files/StarDict/dic", true ) );
//
//    if ( QDir( "C:/Program Files/StarDict/WyabdcRealPeopleTTS" ).exists() )
//      c.soundDirs.push_back( SoundDir( "C:/Program Files/StarDict/WyabdcRealPeopleTTS", "WyabdcRealPeopleTTS" ) );
//    else
//    if ( QDir( "C:/Program Files/WyabdcRealPeopleTTS" ).exists() )
//      c.soundDirs.push_back( SoundDir( "C:/Program Files/WyabdcRealPeopleTTS", "WyabdcRealPeopleTTS" ) );

    #endif

    #ifndef Q_OS_WIN32
    c.preferences.audioPlaybackProgram = "mplayer";
    #endif

    QString possibleMorphologyPath = getProgramDataDir() + "/content/morphology";

    if ( QDir( possibleMorphologyPath ).exists() )
      c.hunspell.dictionariesPath = possibleMorphologyPath;

    c.mediawikis = makeDefaultMediaWikis( true );
    c.webSites = makeDefaultWebSites();

    // Check if we have a template config file. If we do, load it instead

    configName = getProgramDataDir() + "/content/defconfig";
    loadFromTemplate = QFile( configName ).exists();

    if ( !loadFromTemplate )
    {
      save( c );

      return c;
    }
  }

  QFile configFile( configName );

  if ( !configFile.open( QFile::ReadOnly ) )
    throw exCantReadConfigFile();

  QDomDocument dd;

  QString errorStr;
  int errorLine, errorColumn;

  if ( !loadFromTemplate )
  {
    // Load the config as usual
    if ( !dd.setContent( &configFile, false, &errorStr, &errorLine, &errorColumn  ) )
    {
      DPRINTF( "Error: %s at %d,%d\n", errorStr.toLocal8Bit().constData(),  errorLine,  errorColumn );
        throw exMalformedConfigFile();
    }
  }
  else
  {
    // We need to replace all %PROGRAMDIR% with the program data dir
    QByteArray data = configFile.readAll();

    data.replace( "%PROGRAMDIR%", getProgramDataDir().toUtf8() );

    QBuffer bufferedData( &data );

    if ( !dd.setContent( &bufferedData, false, &errorStr, &errorLine, &errorColumn  ) )
    {
      DPRINTF( "Error: %s at %d,%d\n", errorStr.toLocal8Bit().constData(),  errorLine,  errorColumn );
        throw exMalformedConfigFile();
    }
  }

  configFile.close();

  QDomNode root = dd.namedItem( "config" );

  Class c;

  QDomNode paths = root.namedItem( "paths" );

  if ( !paths.isNull() )
  {
    QDomNodeList nl = paths.toElement().elementsByTagName( "path" );

    for( unsigned x = 0; x < nl.length(); ++x )
      c.paths.push_back(
        Path( nl.item( x ).toElement().text(),
              nl.item( x ).toElement().attribute( "recursive" ) == "1" ) );
  }

  QDomNode soundDirs = root.namedItem( "sounddirs" );

  if ( !soundDirs.isNull() )
  {
    QDomNodeList nl = soundDirs.toElement().elementsByTagName( "sounddir" );

    for( unsigned x = 0; x < nl.length(); ++x )
      c.soundDirs.push_back(
        SoundDir( nl.item( x ).toElement().text(),
                  nl.item( x ).toElement().attribute( "name" ) ) );
  }

  QDomNode dictionaryOrder = root.namedItem( "dictionaryOrder" );

  if ( !dictionaryOrder.isNull() )
    c.dictionaryOrder = loadGroup( dictionaryOrder.toElement() );

  QDomNode inactiveDictionaries = root.namedItem( "inactiveDictionaries" );

  if ( !inactiveDictionaries.isNull() )
    c.inactiveDictionaries = loadGroup( inactiveDictionaries.toElement() );

  QDomNode groups = root.namedItem( "groups" );

  if ( !groups.isNull() )
  {
    c.groups.nextId = groups.toElement().attribute( "nextId", "1" ).toUInt();

    QDomNodeList nl = groups.toElement().elementsByTagName( "group" );

    for( unsigned x = 0; x < nl.length(); ++x )
    {
      QDomElement grp = nl.item( x ).toElement();

      c.groups.push_back( loadGroup( grp, &c.groups.nextId ) );
    }
  }

  QDomNode hunspell = root.namedItem( "hunspell" );

  if ( !hunspell.isNull() )
  {
    c.hunspell.dictionariesPath = hunspell.toElement().attribute( "dictionariesPath" );

    QDomNodeList nl = hunspell.toElement().elementsByTagName( "enabled" );

    for( unsigned x = 0; x < nl.length(); ++x )
      c.hunspell.enabledDictionaries.push_back( nl.item( x ).toElement().text() );
  }

  QDomNode transliteration = root.namedItem( "transliteration" );

  if ( !transliteration.isNull() )
  {
    applyBoolOption( c.transliteration.enableRussianTransliteration,
                     transliteration.namedItem( "enableRussianTransliteration" ) );

    applyBoolOption( c.transliteration.enableGermanTransliteration,
                     transliteration.namedItem( "enableGermanTransliteration" ) );

    applyBoolOption( c.transliteration.enableGreekTransliteration,
                     transliteration.namedItem( "enableGreekTransliteration" ) );

    QDomNode romaji = transliteration.namedItem( "romaji" );

    if ( !romaji.isNull() )
    {
      applyBoolOption( c.transliteration.romaji.enable, romaji.namedItem( "enable" ) );
      applyBoolOption( c.transliteration.romaji.enableHepburn, romaji.namedItem( "enableHepburn" ) );
      applyBoolOption( c.transliteration.romaji.enableNihonShiki, romaji.namedItem( "enableNihonShiki" ) );
      applyBoolOption( c.transliteration.romaji.enableKunreiShiki, romaji.namedItem( "enableKunreiShiki" ) );
      applyBoolOption( c.transliteration.romaji.enableHiragana, romaji.namedItem( "enableHiragana" ) );
      applyBoolOption( c.transliteration.romaji.enableKatakana, romaji.namedItem( "enableKatakana" ) );
    }
  }

  QDomNode forvo = root.namedItem( "forvo" );

  if ( !forvo.isNull() )
  {
    applyBoolOption( c.forvo.enable,
                     forvo.namedItem( "enable" ) );

    c.forvo.apiKey = forvo.namedItem( "apiKey" ).toElement().text();
    c.forvo.languageCodes = forvo.namedItem( "languageCodes" ).toElement().text();
  }
  else
    c.forvo.languageCodes = "en, ru"; // Default demo values

  QDomNode programs = root.namedItem( "programs" );

  if ( !programs.isNull() )
  {
    QDomNodeList nl = programs.toElement().elementsByTagName( "program" );

    for( unsigned x = 0; x < nl.length(); ++x )
    {
      QDomElement pr = nl.item( x ).toElement();

      Program p;

      p.id = pr.attribute( "id" );
      p.name = pr.attribute( "name" );
      p.commandLine = pr.attribute( "commandLine" );
      p.enabled = ( pr.attribute( "enabled" ) == "1" );
      p.type = (Program::Type)( pr.attribute( "type" ).toInt() );

      c.programs.push_back( p );
    }
  }
  else
    c.programs = makeDefaultPrograms();

  QDomNode mws = root.namedItem( "mediawikis" );

  if ( !mws.isNull() )
  {
    QDomNodeList nl = mws.toElement().elementsByTagName( "mediawiki" );

    for( unsigned x = 0; x < nl.length(); ++x )
    {
      QDomElement mw = nl.item( x ).toElement();

      MediaWiki w;

      w.id = mw.attribute( "id" );
      w.name = mw.attribute( "name" );
      w.url = mw.attribute( "url" );
      w.enabled = ( mw.attribute( "enabled" ) == "1" );

      c.mediawikis.push_back( w );
    }
  }
  else
  {
    // When upgrading, populate the list with some choices, but don't enable
    // anything.
    c.mediawikis = makeDefaultMediaWikis( false );
  }

  QDomNode wss = root.namedItem( "websites" );

  if ( !wss.isNull() )
  {
    QDomNodeList nl = wss.toElement().elementsByTagName( "website" );

    for( unsigned x = 0; x < nl.length(); ++x )
    {
      QDomElement ws = nl.item( x ).toElement();

      WebSite w;

      w.id = ws.attribute( "id" );
      w.name = ws.attribute( "name" );
      w.url = ws.attribute( "url" );
      w.enabled = ( ws.attribute( "enabled" ) == "1" );

      c.webSites.push_back( w );
    }
  }
  else
  {
    // Upgrading
    c.webSites = makeDefaultWebSites();
  }

  c.mutedDictionaries = loadMutedDictionaries( root.namedItem( "mutedDictionaries" ) );
  c.popupMutedDictionaries = loadMutedDictionaries( root.namedItem( "popupMutedDictionaries" ) );

  QDomNode preferences = root.namedItem( "preferences" );

  if ( !preferences.isNull() )
  {
    c.preferences.interfaceLanguage = preferences.namedItem( "interfaceLanguage" ).toElement().text();
    c.preferences.displayStyle = preferences.namedItem( "displayStyle" ).toElement().text();
    c.preferences.newTabsOpenAfterCurrentOne = ( preferences.namedItem( "newTabsOpenAfterCurrentOne" ).toElement().text() == "1" );
    c.preferences.newTabsOpenInBackground = ( preferences.namedItem( "newTabsOpenInBackground" ).toElement().text() == "1" );
    c.preferences.hideSingleTab = ( preferences.namedItem( "hideSingleTab" ).toElement().text() == "1" );
    c.preferences.hideMenubar = ( preferences.namedItem( "hideMenubar" ).toElement().text() == "1" );
    c.preferences.enableTrayIcon = ( preferences.namedItem( "enableTrayIcon" ).toElement().text() == "1" );
    c.preferences.startToTray = ( preferences.namedItem( "startToTray" ).toElement().text() == "1" );
    c.preferences.closeToTray = ( preferences.namedItem( "closeToTray" ).toElement().text() == "1" );
    c.preferences.autoStart = ( preferences.namedItem( "autoStart" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "doubleClickTranslates" ).isNull() )
      c.preferences.doubleClickTranslates = ( preferences.namedItem( "doubleClickTranslates" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "escKeyHidesMainWindow" ).isNull() )
      c.preferences.escKeyHidesMainWindow = ( preferences.namedItem( "escKeyHidesMainWindow" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "zoomFactor" ).isNull() )
      c.preferences.zoomFactor = preferences.namedItem( "zoomFactor" ).toElement().text().toDouble();

    if ( !preferences.namedItem( "wordsZoomLevel" ).isNull() )
      c.preferences.wordsZoomLevel = preferences.namedItem( "wordsZoomLevel" ).toElement().text().toInt();

    applyBoolOption( c.preferences.enableMainWindowHotkey, preferences.namedItem( "enableMainWindowHotkey" ) );
    if ( !preferences.namedItem( "mainWindowHotkey" ).isNull() )
      c.preferences.mainWindowHotkey = QKeySequence::fromString( preferences.namedItem( "mainWindowHotkey" ).toElement().text() );
    applyBoolOption( c.preferences.enableClipboardHotkey, preferences.namedItem( "enableClipboardHotkey" ) );
    if ( !preferences.namedItem( "clipboardHotkey" ).isNull() )
      c.preferences.clipboardHotkey = QKeySequence::fromString( preferences.namedItem( "clipboardHotkey" ).toElement().text() );

    c.preferences.enableScanPopup = ( preferences.namedItem( "enableScanPopup" ).toElement().text() == "1" );
    c.preferences.startWithScanPopupOn = ( preferences.namedItem( "startWithScanPopupOn" ).toElement().text() == "1" );
    c.preferences.enableScanPopupModifiers = ( preferences.namedItem( "enableScanPopupModifiers" ).toElement().text() == "1" );
    c.preferences.scanPopupModifiers = ( preferences.namedItem( "scanPopupModifiers" ).toElement().text().toULong() );
    c.preferences.scanPopupAltMode = ( preferences.namedItem( "scanPopupAltMode" ).toElement().text() == "1" );
    if ( !preferences.namedItem( "scanPopupAltModeSecs" ).isNull() )
      c.preferences.scanPopupAltModeSecs = preferences.namedItem( "scanPopupAltModeSecs" ).toElement().text().toUInt();
    c.preferences.scanPopupUseUIAutomation = ( preferences.namedItem( "scanPopupUseUIAutomation" ).toElement().text() == "1" );
    c.preferences.scanPopupUseIAccessibleEx = ( preferences.namedItem( "scanPopupUseIAccessibleEx" ).toElement().text() == "1" );
    c.preferences.scanPopupUseGDMessage = ( preferences.namedItem( "scanPopupUseGDMessage" ).toElement().text() == "1" );

    c.preferences.pronounceOnLoadMain = ( preferences.namedItem( "pronounceOnLoadMain" ).toElement().text() == "1" );
    c.preferences.pronounceOnLoadPopup = ( preferences.namedItem( "pronounceOnLoadPopup" ).toElement().text() == "1" );
    
    if ( !preferences.namedItem( "useExternalPlayer" ).isNull() )
      c.preferences.useExternalPlayer = ( preferences.namedItem( "useExternalPlayer" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "useWindowsPlaySound" ).isNull() )
      c.preferences.useWindowsPlaySound = ( preferences.namedItem( "useWindowsPlaySound" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "audioPlaybackProgram" ).isNull() )
      c.preferences.audioPlaybackProgram = preferences.namedItem( "audioPlaybackProgram" ).toElement().text();
    else
      c.preferences.audioPlaybackProgram = "mplayer";

    QDomNode proxy = preferences.namedItem( "proxyserver" );

    if ( !proxy.isNull() )
    {
      c.preferences.proxyServer.enabled = ( proxy.toElement().attribute( "enabled" ) == "1" );
      c.preferences.proxyServer.type = ( ProxyServer::Type ) proxy.namedItem( "type" ).toElement().text().toULong();
      c.preferences.proxyServer.host = proxy.namedItem( "host" ).toElement().text();
      c.preferences.proxyServer.port = proxy.namedItem( "port" ).toElement().text().toULong();
      c.preferences.proxyServer.user = proxy.namedItem( "user" ).toElement().text();
      c.preferences.proxyServer.password = proxy.namedItem( "password" ).toElement().text();
    }

    if ( !preferences.namedItem( "checkForNewReleases" ).isNull() )
      c.preferences.checkForNewReleases = ( preferences.namedItem( "checkForNewReleases" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "disallowContentFromOtherSites" ).isNull() )
      c.preferences.disallowContentFromOtherSites = ( preferences.namedItem( "disallowContentFromOtherSites" ).toElement().text() == "1" );

    if ( !preferences.namedItem( "enableWebPlugins" ).isNull() )
      c.preferences.enableWebPlugins = ( preferences.namedItem( "enableWebPlugins" ).toElement().text() == "1" );
  }

  c.lastMainGroupId = root.namedItem( "lastMainGroupId" ).toElement().text().toUInt();
  c.lastPopupGroupId = root.namedItem( "lastPopupGroupId" ).toElement().text().toUInt();

  QDomNode popupWindowState = root.namedItem( "popupWindowState" );

  if ( !popupWindowState.isNull() )
    c.popupWindowState = QByteArray::fromBase64( popupWindowState.toElement().text().toLatin1() );

  QDomNode popupWindowGeometry = root.namedItem( "popupWindowGeometry" );

  if ( !popupWindowGeometry.isNull() )
    c.popupWindowGeometry = QByteArray::fromBase64( popupWindowGeometry.toElement().text().toLatin1() );

  c.pinPopupWindow = ( root.namedItem( "pinPopupWindow" ).toElement().text() == "1" );

  QDomNode mainWindowState = root.namedItem( "mainWindowState" );

  if ( !mainWindowState.isNull() )
    c.mainWindowState = QByteArray::fromBase64( mainWindowState.toElement().text().toLatin1() );

  QDomNode mainWindowGeometry = root.namedItem( "mainWindowGeometry" );

  if ( !mainWindowGeometry.isNull() )
    c.mainWindowGeometry = QByteArray::fromBase64( mainWindowGeometry.toElement().text().toLatin1() );

  QDomNode timeForNewReleaseCheck = root.namedItem( "timeForNewReleaseCheck" );

  if ( !timeForNewReleaseCheck.isNull() )
    c.timeForNewReleaseCheck = QDateTime::fromString( timeForNewReleaseCheck.toElement().text(),
                                                      Qt::ISODate );

  c.skippedRelease = root.namedItem( "skippedRelease" ).toElement().text();

  c.showingDictBarNames = ( root.namedItem( "showingDictBarNames" ).toElement().text() == "1" );

  c.usingSmallIconsInToolbars = ( root.namedItem( "usingSmallIconsInToolbars" ).toElement().text() == "1" );

  if ( !root.namedItem( "maxDictionaryRefsInContextMenu" ).isNull() )
    c.maxDictionaryRefsInContextMenu = root.namedItem( "maxDictionaryRefsInContextMenu" ).toElement().text().toUShort();

  return c;
}

namespace {
void saveGroup( Group const & data, QDomElement & group )
{
  QDomDocument dd = group.ownerDocument();

  QDomAttr id = dd.createAttribute( "id" );

  id.setValue( QString::number( data.id ) );

  group.setAttributeNode( id );

  QDomAttr name = dd.createAttribute( "name" );

  name.setValue( data.name );

  group.setAttributeNode( name );

  if ( data.icon.size() )
  {
    QDomAttr icon = dd.createAttribute( "icon" );

    icon.setValue( data.icon );

    group.setAttributeNode( icon );
  }

  if ( data.iconData.size() )
  {
    QDomAttr iconData = dd.createAttribute( "iconData" );

    iconData.setValue( QString::fromAscii( data.iconData.toBase64() ) );

    group.setAttributeNode( iconData );
  }

  if ( !data.shortcut.isEmpty() )
  {
    QDomAttr shortcut = dd.createAttribute( "shortcut" );

    shortcut.setValue(  data.shortcut.toString() );

    group.setAttributeNode( shortcut );
  }

  for( vector< DictionaryRef >::const_iterator j = data.dictionaries.begin(); j != data.dictionaries.end(); ++j )
  {
    QDomElement dictionary = dd.createElement( "dictionary" );

    group.appendChild( dictionary );

    QDomText value = dd.createTextNode( j->id );

    dictionary.appendChild( value );

    QDomAttr name = dd.createAttribute( "name" );

    name.setValue( j->name );

    dictionary.setAttributeNode( name );
  }
}

}

void save( Class const & c ) throw( exError )
{
  QFile configFile( getConfigFileName() + ".tmp" );

  if ( !configFile.open( QFile::WriteOnly ) )
    throw exCantWriteConfigFile();

  QDomDocument dd;

  QDomElement root = dd.createElement( "config" );
  dd.appendChild( root );

  {
    QDomElement paths = dd.createElement( "paths" );
    root.appendChild( paths );

    for( Paths::const_iterator i = c.paths.begin(); i != c.paths.end(); ++i )
    {
      QDomElement path = dd.createElement( "path" );
      paths.appendChild( path );

      QDomAttr recursive = dd.createAttribute( "recursive" );
      recursive.setValue( i->recursive ? "1" : "0" );
      path.setAttributeNode( recursive );

      QDomText value = dd.createTextNode( i->path );

      path.appendChild( value );
    }
  }

  {
    QDomElement soundDirs = dd.createElement( "sounddirs" );
    root.appendChild( soundDirs );

    for( SoundDirs::const_iterator i = c.soundDirs.begin(); i != c.soundDirs.end(); ++i )
    {
      QDomElement soundDir = dd.createElement( "sounddir" );
      soundDirs.appendChild( soundDir );

      QDomAttr name = dd.createAttribute( "name" );
      name.setValue( i->name );
      soundDir.setAttributeNode( name );

      QDomText value = dd.createTextNode( i->path );

      soundDir.appendChild( value );
    }
  }

  {
    QDomElement dictionaryOrder = dd.createElement( "dictionaryOrder" );
    root.appendChild( dictionaryOrder );
    saveGroup( c.dictionaryOrder, dictionaryOrder );
  }

  {
    QDomElement inactiveDictionaries = dd.createElement( "inactiveDictionaries" );
    root.appendChild( inactiveDictionaries );
    saveGroup( c.inactiveDictionaries, inactiveDictionaries );
  }

  {
    QDomElement groups = dd.createElement( "groups" );
    root.appendChild( groups );

    QDomAttr nextId = dd.createAttribute( "nextId" );
    nextId.setValue( QString::number( c.groups.nextId ) );
    groups.setAttributeNode( nextId );

    for( Groups::const_iterator i = c.groups.begin(); i != c.groups.end(); ++i )
    {
      QDomElement group = dd.createElement( "group" );
      groups.appendChild( group );

      saveGroup( *i, group );
    }
  }

  {
    QDomElement hunspell = dd.createElement( "hunspell" );
    QDomAttr path = dd.createAttribute( "dictionariesPath" );
    path.setValue( c.hunspell.dictionariesPath );
    hunspell.setAttributeNode( path );
    root.appendChild( hunspell );

    for( unsigned x = 0; x < c.hunspell.enabledDictionaries.size(); ++x )
    {
      QDomElement en = dd.createElement( "enabled" );
      QDomText value = dd.createTextNode( c.hunspell.enabledDictionaries[ x ] );

      en.appendChild( value );
      hunspell.appendChild( en );
    }
  }

  {
    // Russian translit

    QDomElement transliteration = dd.createElement( "transliteration" );
    root.appendChild( transliteration );

    QDomElement opt = dd.createElement( "enableRussianTransliteration" );
    opt.appendChild( dd.createTextNode( c.transliteration.enableRussianTransliteration ? "1":"0" ) );
    transliteration.appendChild( opt );

    // German translit

    opt = dd.createElement( "enableGermanTransliteration" );
    opt.appendChild( dd.createTextNode( c.transliteration.enableGermanTransliteration ? "1":"0" ) );
    transliteration.appendChild( opt );

    // Greek translit

    opt = dd.createElement( "enableGreekTransliteration" );
    opt.appendChild( dd.createTextNode( c.transliteration.enableGreekTransliteration ? "1":"0" ) );
    transliteration.appendChild( opt );

    // Romaji

    QDomElement romaji = dd.createElement( "romaji" );
    transliteration.appendChild( romaji );

    opt = dd.createElement( "enable" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enable ? "1":"0" ) );
    romaji.appendChild( opt );

    opt = dd.createElement( "enableHepburn" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enableHepburn ? "1":"0" ) );
    romaji.appendChild( opt );

    opt = dd.createElement( "enableNihonShiki" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enableNihonShiki ? "1":"0" ) );
    romaji.appendChild( opt );

    opt = dd.createElement( "enableKunreiShiki" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enableKunreiShiki ? "1":"0" ) );
    romaji.appendChild( opt );

    opt = dd.createElement( "enableHiragana" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enableHiragana ? "1":"0" ) );
    romaji.appendChild( opt );

    opt = dd.createElement( "enableKatakana" );
    opt.appendChild( dd.createTextNode( c.transliteration.romaji.enableKatakana ? "1":"0" ) );
    romaji.appendChild( opt );
  }

  {
    // Forvo

    QDomElement forvo = dd.createElement( "forvo" );
    root.appendChild( forvo );

    QDomElement opt = dd.createElement( "enable" );
    opt.appendChild( dd.createTextNode( c.forvo.enable ? "1":"0" ) );
    forvo.appendChild( opt );

    opt = dd.createElement( "apiKey" );
    opt.appendChild( dd.createTextNode( c.forvo.apiKey ) );
    forvo.appendChild( opt );

    opt = dd.createElement( "languageCodes" );
    opt.appendChild( dd.createTextNode( c.forvo.languageCodes ) );
    forvo.appendChild( opt );
  }

  {
    QDomElement mws = dd.createElement( "mediawikis" );
    root.appendChild( mws );

    for( MediaWikis::const_iterator i = c.mediawikis.begin(); i != c.mediawikis.end(); ++i )
    {
      QDomElement mw = dd.createElement( "mediawiki" );
      mws.appendChild( mw );

      QDomAttr id = dd.createAttribute( "id" );
      id.setValue( i->id );
      mw.setAttributeNode( id );

      QDomAttr name = dd.createAttribute( "name" );
      name.setValue( i->name );
      mw.setAttributeNode( name );

      QDomAttr url = dd.createAttribute( "url" );
      url.setValue( i->url );
      mw.setAttributeNode( url );

      QDomAttr enabled = dd.createAttribute( "enabled" );
      enabled.setValue( i->enabled ? "1" : "0" );
      mw.setAttributeNode( enabled );
    }
  }

  {
    QDomElement wss = dd.createElement( "websites" );
    root.appendChild( wss );

    for( WebSites::const_iterator i = c.webSites.begin(); i != c.webSites.end(); ++i )
    {
      QDomElement ws = dd.createElement( "website" );
      wss.appendChild( ws );

      QDomAttr id = dd.createAttribute( "id" );
      id.setValue( i->id );
      ws.setAttributeNode( id );

      QDomAttr name = dd.createAttribute( "name" );
      name.setValue( i->name );
      ws.setAttributeNode( name );

      QDomAttr url = dd.createAttribute( "url" );
      url.setValue( i->url );
      ws.setAttributeNode( url );

      QDomAttr enabled = dd.createAttribute( "enabled" );
      enabled.setValue( i->enabled ? "1" : "0" );
      ws.setAttributeNode( enabled );
    }
  }

  {
    QDomElement programs = dd.createElement( "programs" );
    root.appendChild( programs );

    for( Programs::const_iterator i = c.programs.begin(); i != c.programs.end(); ++i )
    {
      QDomElement p = dd.createElement( "program" );
      programs.appendChild( p );

      QDomAttr id = dd.createAttribute( "id" );
      id.setValue( i->id );
      p.setAttributeNode( id );

      QDomAttr name = dd.createAttribute( "name" );
      name.setValue( i->name );
      p.setAttributeNode( name );

      QDomAttr commandLine = dd.createAttribute( "commandLine" );
      commandLine.setValue( i->commandLine );
      p.setAttributeNode( commandLine );

      QDomAttr enabled = dd.createAttribute( "enabled" );
      enabled.setValue( i->enabled ? "1" : "0" );
      p.setAttributeNode( enabled );

      QDomAttr type = dd.createAttribute( "type" );
      type.setValue( QString::number( i->type ) );
      p.setAttributeNode( type );
    }
  }


  {
    QDomElement muted = dd.createElement( "mutedDictionaries" );
    root.appendChild( muted );
    saveMutedDictionaries( dd, muted, c.mutedDictionaries );
  }

  {
    QDomElement muted = dd.createElement( "popupMutedDictionaries" );
    root.appendChild( muted );
    saveMutedDictionaries( dd, muted, c.popupMutedDictionaries );
  }

  {
    QDomElement preferences = dd.createElement( "preferences" );
    root.appendChild( preferences );

    QDomElement opt = dd.createElement( "interfaceLanguage" );
    opt.appendChild( dd.createTextNode( c.preferences.interfaceLanguage ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "displayStyle" );
    opt.appendChild( dd.createTextNode( c.preferences.displayStyle ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "newTabsOpenAfterCurrentOne" );
    opt.appendChild( dd.createTextNode( c.preferences.newTabsOpenAfterCurrentOne ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "newTabsOpenInBackground" );
    opt.appendChild( dd.createTextNode( c.preferences.newTabsOpenInBackground ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "hideSingleTab" );
    opt.appendChild( dd.createTextNode( c.preferences.hideSingleTab ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "hideMenubar" );
    opt.appendChild( dd.createTextNode( c.preferences.hideMenubar ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableTrayIcon" );
    opt.appendChild( dd.createTextNode( c.preferences.enableTrayIcon ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "startToTray" );
    opt.appendChild( dd.createTextNode( c.preferences.startToTray ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "closeToTray" );
    opt.appendChild( dd.createTextNode( c.preferences.closeToTray ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "autoStart" );
    opt.appendChild( dd.createTextNode( c.preferences.autoStart ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "doubleClickTranslates" );
    opt.appendChild( dd.createTextNode( c.preferences.doubleClickTranslates ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "escKeyHidesMainWindow" );
    opt.appendChild( dd.createTextNode( c.preferences.escKeyHidesMainWindow ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "zoomFactor" );
    opt.appendChild( dd.createTextNode( QString::number( c.preferences.zoomFactor ) ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "wordsZoomLevel" );
    opt.appendChild( dd.createTextNode( QString::number( c.preferences.wordsZoomLevel ) ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableMainWindowHotkey" );
    opt.appendChild( dd.createTextNode( c.preferences.enableMainWindowHotkey ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "mainWindowHotkey" );
    opt.appendChild( dd.createTextNode( c.preferences.mainWindowHotkey.toKeySequence().toString() ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableClipboardHotkey" );
    opt.appendChild( dd.createTextNode( c.preferences.enableClipboardHotkey ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "clipboardHotkey" );
    opt.appendChild( dd.createTextNode( c.preferences.clipboardHotkey.toKeySequence().toString() ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableScanPopup" );
    opt.appendChild( dd.createTextNode( c.preferences.enableScanPopup ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "startWithScanPopupOn" );
    opt.appendChild( dd.createTextNode( c.preferences.startWithScanPopupOn ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableScanPopupModifiers" );
    opt.appendChild( dd.createTextNode( c.preferences.enableScanPopupModifiers ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupModifiers" );
    opt.appendChild( dd.createTextNode( QString::number( c.preferences.scanPopupModifiers ) ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupAltMode" );
    opt.appendChild( dd.createTextNode( c.preferences.scanPopupAltMode ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupAltModeSecs" );
    opt.appendChild( dd.createTextNode( QString::number( c.preferences.scanPopupAltModeSecs ) ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupUseUIAutomation" );
    opt.appendChild( dd.createTextNode( c.preferences.scanPopupUseUIAutomation ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupUseIAccessibleEx" );
    opt.appendChild( dd.createTextNode( c.preferences.scanPopupUseIAccessibleEx ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "scanPopupUseGDMessage" );
    opt.appendChild( dd.createTextNode( c.preferences.scanPopupUseGDMessage ? "1":"0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "pronounceOnLoadMain" );
    opt.appendChild( dd.createTextNode( c.preferences.pronounceOnLoadMain ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "pronounceOnLoadPopup" );
    opt.appendChild( dd.createTextNode( c.preferences.pronounceOnLoadPopup ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "useExternalPlayer" );
    opt.appendChild( dd.createTextNode( c.preferences.useExternalPlayer ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "useWindowsPlaySound" );
    opt.appendChild( dd.createTextNode( c.preferences.useWindowsPlaySound ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "audioPlaybackProgram" );
    opt.appendChild( dd.createTextNode( c.preferences.audioPlaybackProgram ) );
    preferences.appendChild( opt );

    {
      QDomElement proxy = dd.createElement( "proxyserver" );
      preferences.appendChild( proxy );

      QDomAttr enabled = dd.createAttribute( "enabled" );
      enabled.setValue( c.preferences.proxyServer.enabled ? "1" : "0" );
      proxy.setAttributeNode( enabled );

      opt = dd.createElement( "type" );
      opt.appendChild( dd.createTextNode( QString::number( c.preferences.proxyServer.type ) ) );
      proxy.appendChild( opt );

      opt = dd.createElement( "host" );
      opt.appendChild( dd.createTextNode( c.preferences.proxyServer.host ) );
      proxy.appendChild( opt );

      opt = dd.createElement( "port" );
      opt.appendChild( dd.createTextNode( QString::number( c.preferences.proxyServer.port ) ) );
      proxy.appendChild( opt );

      opt = dd.createElement( "user" );
      opt.appendChild( dd.createTextNode( c.preferences.proxyServer.user ) );
      proxy.appendChild( opt );

      opt = dd.createElement( "password" );
      opt.appendChild( dd.createTextNode( c.preferences.proxyServer.password ) );
      proxy.appendChild( opt );
    }

    opt = dd.createElement( "checkForNewReleases" );
    opt.appendChild( dd.createTextNode( c.preferences.checkForNewReleases ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "disallowContentFromOtherSites" );
    opt.appendChild( dd.createTextNode( c.preferences.disallowContentFromOtherSites ? "1" : "0" ) );
    preferences.appendChild( opt );

    opt = dd.createElement( "enableWebPlugins" );
    opt.appendChild( dd.createTextNode( c.preferences.enableWebPlugins ? "1" : "0" ) );
    preferences.appendChild( opt );
  }

  {
    QDomElement opt = dd.createElement( "lastMainGroupId" );
    opt.appendChild( dd.createTextNode( QString::number( c.lastMainGroupId ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "lastPopupGroupId" );
    opt.appendChild( dd.createTextNode( QString::number( c.lastPopupGroupId ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "popupWindowState" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.popupWindowState.toBase64() ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "popupWindowGeometry" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.popupWindowGeometry.toBase64() ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "pinPopupWindow" );
    opt.appendChild( dd.createTextNode( c.pinPopupWindow ? "1" : "0" ) );
    root.appendChild( opt );

    opt = dd.createElement( "mainWindowState" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.mainWindowState.toBase64() ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "mainWindowGeometry" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.mainWindowGeometry.toBase64() ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "timeForNewReleaseCheck" );
    opt.appendChild( dd.createTextNode( c.timeForNewReleaseCheck.toString( Qt::ISODate ) ) );
    root.appendChild( opt );

    opt = dd.createElement( "skippedRelease" );
    opt.appendChild( dd.createTextNode( c.skippedRelease ) );
    root.appendChild( opt );

    opt = dd.createElement( "showingDictBarNames" );
    opt.appendChild( dd.createTextNode( c.showingDictBarNames ? "1" : "0" ) );
    root.appendChild( opt );

    opt = dd.createElement( "usingSmallIconsInToolbars" );
    opt.appendChild( dd.createTextNode( c.usingSmallIconsInToolbars ? "1" : "0" ) );
    root.appendChild( opt );

    opt = dd.createElement( "maxDictionaryRefsInContextMenu" );
    opt.appendChild( dd.createTextNode( QString::number( c.maxDictionaryRefsInContextMenu ) ) );
    root.appendChild( opt );
  }

  QByteArray result( dd.toByteArray() );

  if ( configFile.write( result ) != result.size() )
    throw exCantWriteConfigFile();

  configFile.close();

  renameAtomically( configFile.fileName(), getConfigFileName() );
}

QString getConfigDir() throw( exError )
{
  return getHomeDir().path() + QDir::separator();
}

QString getIndexDir() throw( exError )
{
  QDir result = getHomeDir();

  result.mkpath( "index" );

  if ( !result.cd( "index" ) )
    throw exCantUseIndexDir();

  return result.path() + QDir::separator();
}

QString getPidFileName() throw( exError )
{
  return getHomeDir().filePath( "pid" );
}

QString getHistoryFileName() throw( exError )
{
  return getHomeDir().filePath( "history" );
}

QString getUserCssFileName() throw( exError )
{
  return getHomeDir().filePath( "article-style.css" );
}

QString getUserCssPrintFileName() throw( exError )
{
  return getHomeDir().filePath( "article-style-print.css" );
}

QString getUserQtCssFileName() throw( exError )
{
  return getHomeDir().filePath( "qt-style.css" );
}

QString getProgramDataDir() throw()
{
  if ( isPortableVersion() )
    return QCoreApplication::applicationDirPath();

  #ifdef PROGRAM_DATA_DIR
  return PROGRAM_DATA_DIR;
  #else
  return QCoreApplication::applicationDirPath();
  #endif
}

QString getLocDir() throw()
{
  if ( QDir( getProgramDataDir() ).cd( "locale" ) )
    return getProgramDataDir() + "/locale";
  else
    return QCoreApplication::applicationDirPath() + "/locale";
}

bool isPortableVersion() throw()
{
  struct IsPortable
  {
    bool isPortable;

    IsPortable(): isPortable( QFileInfo( QCoreApplication::applicationDirPath() + "/portable" ).isDir() )
    {}
  };

  static IsPortable p;

  return p.isPortable;
}

QString getPortableVersionDictionaryDir() throw()
{
  if ( isPortableVersion() )
    return getProgramDataDir() + "/content";
  else
    return QString();
}

QString getPortableVersionMorphoDir() throw()
{
  if ( isPortableVersion() )
    return getPortableVersionDictionaryDir() + "/morphology";
  else
    return QString();
}

}