/* This file is (c) 2008-2012 Konstantin Isakov <ikm@goldendict.org>
 * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */

#include "config.hh"
#include "folding.hh"
#include "wstring_qt.hh"
#include <QDir>
#include <QFile>
#include <QtXml>
#include "gddebug.hh"

#include <stdint.h>

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

#include "atomic_rename.hh"
#include "utils.hh"

#include <QStandardPaths>

#if defined( HAVE_X11 )
// Whether XDG Base Directory specification might be followed.
// Only Qt5 builds are supported, as Qt4 doesn't provide all functions needed
// to get XDG Base Directory compliant locations.
#define XDG_BASE_DIRECTORY_COMPLIANCE
#endif

namespace Config {

namespace
{
#ifdef XDG_BASE_DIRECTORY_COMPLIANCE
  const char xdgSubdirName[] = "goldendict";

  QDir getDataDir()
  {
    QDir dir = QStandardPaths::writableLocation( QStandardPaths::GenericDataLocation );
    dir.mkpath( xdgSubdirName );
    if ( !dir.cd( xdgSubdirName ) )
      throw exCantUseDataDir();

    return dir;
  }
#endif

  QString portableHomeDirPath()
  {
    return QCoreApplication::applicationDirPath() + "/portable";
  }

  QDir getHomeDir()
  {
    if ( isPortableVersion() )
      return QDir( portableHomeDirPath() );

    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";
      #ifdef XDG_BASE_DIRECTORY_COMPLIANCE
        // check if an old config dir is present, otherwise use standards-compliant location
        if ( !result.exists( pathInHome ) )
        {
          result.setPath( QStandardPaths::writableLocation( QStandardPaths::ConfigLocation ) );
          pathInHome = xdgSubdirName;
        }
      #endif
    #endif

    result.mkpath( pathInHome );

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

    return result;
  }

}

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

AnkiConnectServer::AnkiConnectServer(): enabled( false ), host("127.0.0.1"), port( 8765 )
{
}

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 );
}

bool InternalPlayerBackend::anyAvailable()
{
#if defined( MAKE_FFMPEG_PLAYER ) || defined( MAKE_QTMULTIMEDIA_PLAYER )
  return true;
#else
  return false;
#endif
}

InternalPlayerBackend InternalPlayerBackend::defaultBackend()
{
#if defined( MAKE_FFMPEG_PLAYER )
  return ffmpeg();
#elif defined( MAKE_QTMULTIMEDIA_PLAYER )
  return qtmultimedia();
#else
  return InternalPlayerBackend( QString() );
#endif
}

QStringList InternalPlayerBackend::nameList()
{
  QStringList result;
#ifdef MAKE_FFMPEG_PLAYER
  result.push_back( ffmpeg().uiName() );
#endif
#ifdef MAKE_QTMULTIMEDIA_PLAYER
  result.push_back( qtmultimedia().uiName() );
#endif
  return result;
}

bool InternalPlayerBackend::isFfmpeg() const
{
#ifdef MAKE_FFMPEG_PLAYER
  return *this == ffmpeg();
#else
  return false;
#endif
}

bool InternalPlayerBackend::isQtmultimedia() const
{
#ifdef MAKE_QTMULTIMEDIA_PLAYER
  return *this == qtmultimedia();
#else
  return false;
#endif
}

ScanPopupWindowFlags spwfFromInt( int id )
{
  if( id == SPWF_Popup )
    return SPWF_Popup;
  if( id == SPWF_Tool )
    return SPWF_Tool;

  if( id != SPWF_default )
    gdWarning( "Invalid ScanPopup unpinned window flags: %d\n", id );
  return SPWF_default;
}

InputPhrase Preferences::sanitizeInputPhrase( QString const & inputPhrase ) const
{
  InputPhrase result;

  if( limitInputPhraseLength && inputPhrase.size() > inputPhraseLengthLimit )
  {
    gdDebug( "Ignoring an input phrase %d symbols long. The configured maximum input phrase length is %d symbols.",
             inputPhrase.size(), inputPhraseLengthLimit );
    return result;
  }

  const QString withPunct = inputPhrase.simplified();
  result.phrase = gd::toQString( Folding::trimWhitespaceOrPunct( gd::toWString( withPunct ) ) );
  if ( !result.isValid() )
    return result; // The suffix of an invalid input phrase must be empty.

  const int prefixSize = withPunct.indexOf( result.phrase.at(0) );
  const int suffixSize = withPunct.size() - prefixSize - result.phrase.size();
  Q_ASSERT( suffixSize >= 0 );
  Q_ASSERT( withPunct.size() - suffixSize - 1
            == withPunct.lastIndexOf( result.phrase.at( result.phrase.size() - 1 ) ) );
  if ( suffixSize != 0 )
    result.punctuationSuffix = withPunct.right( suffixSize );

  return result;
}

Preferences::Preferences():
  newTabsOpenAfterCurrentOne( false ),
  newTabsOpenInBackground( true ),
  hideSingleTab( false ),
  mruTabOrder ( false ),
  hideMenubar( false ),
  enableTrayIcon( true ),
  startToTray( false ),
  closeToTray( true ),
  autoStart( false ),
  doubleClickTranslates( true ),
  selectWordBySingleClick( false ),
  autoScrollToTargetArticle( true ),
  escKeyHidesMainWindow( false ),
  alwaysOnTop ( false ),
  searchInDock ( false ),

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

  startWithScanPopupOn( false ),
  enableScanPopupModifiers( false ),
  scanPopupModifiers( 0 ),
  ignoreOwnClipboardChanges( false ),
  scanToMainWindow( false ),
  ignoreDiacritics( false ),
  ignorePunctuation( false ),
#ifdef HAVE_X11
  // Enable both Clipboard and Selection by default so that X users can enjoy full
  // power and disable optionally.
  trackClipboardScan ( true ),
  trackSelectionScan ( true ),
  showScanFlag( false ),
#endif
  pronounceOnLoadMain( false ),
  pronounceOnLoadPopup( false ),
  useInternalPlayer( InternalPlayerBackend::anyAvailable() ),
  internalPlayerBackend( InternalPlayerBackend::defaultBackend() ),
  checkForNewReleases( true ),
  disallowContentFromOtherSites( false ),
  enableWebPlugins( false ),
  hideGoldenDictHeader( false ),
  maxNetworkCacheSize( 50 ),
  clearNetworkCacheOnExit( true ),
  zoomFactor( 1 ),
  helpZoomFactor( 1 ),
  wordsZoomLevel( 0 ),
  maxStringsInHistory( 500 ),
  storeHistory( 1 ),
  alwaysExpandOptionalParts( false )
, historyStoreInterval( 0 )
, favoritesStoreInterval( 0 )
, confirmFavoritesDeletion( true )
, collapseBigArticles( false )
, articleSizeLimit( 2000 )
, limitInputPhraseLength( false )
, inputPhraseLengthLimit( 1000 )
, maxDictionaryRefsInContextMenu ( 20 )
, synonymSearchEnabled( true )
{
}

Chinese::Chinese():
  enable( false ),
  enableSCToTWConversion( true ),
  enableSCToHKConversion( true ),
  enableTCToSCConversion( true )
{
}

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

Group * Class::getGroup( unsigned id )
{
  for( int x = 0; x < groups.size(); x++ )
    if( groups.at( x ).id == id )
      return &groups[ x ];
  return 0;
}

Group const * Class::getGroup( unsigned id ) const
{
  for( int x = 0; x < groups.size(); x++ )
    if( groups.at( x ).id == id )
      return &groups.at( x );
  return 0;
}

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

namespace {

MediaWikis makeDefaultMediaWikis( bool enable )
{
  MediaWikis mw;

  mw.push_back( MediaWiki( "ae6f89aac7151829681b85f035d54e48", "English Wikipedia", "https://en.wikipedia.org/w", enable, "" ) );
  mw.push_back( MediaWiki( "affcf9678e7bfe701c9b071f97eccba3", "English Wiktionary", "https://en.wiktionary.org/w", false, ""  ) );
  mw.push_back( MediaWiki( "8e0c1c2b6821dab8bdba8eb869ca7176", "Russian Wikipedia", "https://ru.wikipedia.org/w", false, "" ) );
  mw.push_back( MediaWiki( "b09947600ae3902654f8ad4567ae8567", "Russian Wiktionary", "https://ru.wiktionary.org/w", false, "" ) );
  mw.push_back( MediaWiki( "a8a66331a1242ca2aeb0b4aed361c41d", "German Wikipedia", "https://de.wikipedia.org/w", false, "" ) );
  mw.push_back( MediaWiki( "21c64bca5ec10ba17ff19f3066bc962a", "German Wiktionary", "https://de.wiktionary.org/w", false, "" ) );
  mw.push_back( MediaWiki( "96957cb2ad73a20c7a1d561fc83c253a", "Portuguese Wikipedia", "https://pt.wikipedia.org/w", false, "" ) );
  mw.push_back( MediaWiki( "ed4c3929196afdd93cc08b9a903aad6a", "Portuguese Wiktionary", "https://pt.wiktionary.org/w", false, "" ) );
  mw.push_back( MediaWiki( "f3b4ec8531e52ddf5b10d21e4577a7a2", "Greek Wikipedia", "https://el.wikipedia.org/w", false, "" ) );
  mw.push_back( MediaWiki( "5d45232075d06e002dea72fe3e137da1", "Greek Wiktionary", "https://el.wiktionary.org/w", false, "" ) );

  return mw;
}

WebSites makeDefaultWebSites()
{
  WebSites ws;

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

  return ws;
}

DictServers makeDefaultDictServers()
{
  DictServers ds;

  return ds;
}

Programs makeDefaultPrograms()
{
  Programs programs;

  // The following list doesn't make a lot of sense under Windows
#ifndef Q_OS_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" );
  g.favoritesFolder = grp.attribute( "favoritesFolder" );

  if ( !grp.attribute( "iconData" ).isEmpty() )
    g.iconData = QByteArray::fromBase64( grp.attribute( "iconData" ).toLatin1() );

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

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

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

  QDomNode muted = grp.namedItem( "mutedDictionaries" );
  dicts = muted.toElement().elementsByTagName( "mutedDictionary" );
  for( int x = 0; x < dicts.length(); ++x )
    g.mutedDictionaries.insert( dicts.item( x ).toElement().text() );

  dicts = muted.toElement().elementsByTagName( "popupMutedDictionary" );
  for( int x = 0; x < dicts.length(); ++x )
    g.popupMutedDictionaries.insert( dicts.item( x ).toElement().text() );

  return g;
}

MutedDictionaries loadMutedDictionaries( QDomNode mutedDictionaries )
{
  MutedDictionaries result;

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

    for( int 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() 
{
  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/opendict/dictionaries" ).exists() )
      c.paths.push_back( Path( "/usr/share/opendict/dictionaries", true ) );

    if ( QDir( "/usr/share/goldendict-wordnet" ).exists() )
      c.paths.push_back( Path( "/usr/share/goldendict-wordnet", 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();
    c.dictServers = makeDefaultDictServers();
    c.programs = makeDefaultPrograms();

    // 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;
    }
  }

  getStylesDir();

  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  ) )
    {
      GD_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  ) )
    {
      GD_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( int 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( int x = 0; x < nl.length(); ++x )
      c.soundDirs.push_back(
        SoundDir( nl.item( x ).toElement().text(),
                  nl.item( x ).toElement().attribute( "name" ),
                  nl.item( x ).toElement().attribute( "icon" ) ) );
  }

  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( int 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( int 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" ) );

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

#ifdef MAKE_CHINESE_CONVERSION_SUPPORT
    QDomNode chinese = transliteration.namedItem( "chinese" );

    if ( !chinese.isNull() )
    {
      applyBoolOption( c.transliteration.chinese.enable, chinese.namedItem( "enable" ) );
      applyBoolOption( c.transliteration.chinese.enableSCToTWConversion, chinese.namedItem( "enableSCToTWConversion" ) );
      applyBoolOption( c.transliteration.chinese.enableSCToHKConversion, chinese.namedItem( "enableSCToHKConversion" ) );
      applyBoolOption( c.transliteration.chinese.enableTCToSCConversion, chinese.namedItem( "enableTCToSCConversion" ) );
    }
#endif

    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( int 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() );
      p.iconFilename = pr.attribute( "icon" );

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

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

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

    for( int 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" );
      w.icon = mw.attribute( "icon" );

      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( int 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" );
      w.iconFilename = ws.attribute( "icon" );
      w.inside_iframe = ( ws.attribute( "inside_iframe", "1" ) == "1" );

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

  QDomNode dss = root.namedItem( "dictservers" );

  if ( !dss.isNull() )
  {
    QDomNodeList nl = dss.toElement().elementsByTagName( "server" );

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

      DictServer d;

      d.id = ds.attribute( "id" );
      d.name = ds.attribute( "name" );
      d.url = ds.attribute( "url" );
      d.enabled = ( ds.attribute( "enabled" ) == "1" );
      d.databases = ds.attribute( "databases" );
      d.strategies = ds.attribute( "strategies" );
      d.iconFilename = ds.attribute( "icon" );

      c.dictServers.push_back( d );
    }
  }
  else
  {
    // Upgrading
    c.dictServers = makeDefaultDictServers();
  }

  QDomNode ves = root.namedItem( "voiceEngines" );

  if ( !ves.isNull() )
  {
    QDomNodeList nl = ves.toElement().elementsByTagName( "voiceEngine" );

    for ( int x = 0; x < nl.length(); ++x )
    {
      QDomElement ve = nl.item( x ).toElement();
      VoiceEngine v;

      v.enabled = ve.attribute( "enabled" ) == "1";
      v.id = ve.attribute( "id" );
      v.name = ve.attribute( "name" );
      v.iconFilename = ve.attribute( "icon" );
      v.volume = ve.attribute( "volume", "50" ).toInt();
      if( v.volume < 0 || v.volume > 100 )
        v.volume = 50;
      v.rate = ve.attribute( "rate", "50" ).toInt();
      if( v.rate < 0 || v.rate > 100 )
        v.rate = 50;
      c.voiceEngines.push_back( v );
    }
  }

  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.helpLanguage = preferences.namedItem( "helpLanguage" ).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.mruTabOrder = ( preferences.namedItem( "mruTabOrder" ).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" );
    c.preferences.alwaysOnTop = ( preferences.namedItem( "alwaysOnTop" ).toElement().text() == "1" );
    c.preferences.searchInDock = ( preferences.namedItem( "searchInDock" ).toElement().text() == "1" );

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

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

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

    if ( !preferences.namedItem( "autoScrollToTargetArticle" ).isNull() )
      c.preferences.autoScrollToTargetArticle = ( preferences.namedItem( "autoScrollToTargetArticle" ).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( "helpZoomFactor" ).isNull() )
      c.preferences.helpZoomFactor = preferences.namedItem( "helpZoomFactor" ).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.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.ignoreOwnClipboardChanges = ( preferences.namedItem( "ignoreOwnClipboardChanges" ).toElement().text() == "1" );
    c.preferences.scanToMainWindow = ( preferences.namedItem( "scanToMainWindow" ).toElement().text() == "1" );
    c.preferences.ignoreDiacritics = ( preferences.namedItem( "ignoreDiacritics" ).toElement().text() == "1" );
    if( !preferences.namedItem( "ignorePunctuation" ).isNull() )
      c.preferences.ignorePunctuation = ( preferences.namedItem( "ignorePunctuation" ).toElement().text() == "1" );
#ifdef HAVE_X11
    c.preferences.trackClipboardScan= ( preferences.namedItem( "trackClipboardScan" ).toElement().text() == "1" );
    c.preferences.trackSelectionScan= ( preferences.namedItem( "trackSelectionScan" ).toElement().text() == "1" );
    c.preferences.showScanFlag= ( preferences.namedItem( "showScanFlag" ).toElement().text() == "1" );
#endif

    c.preferences.pronounceOnLoadMain = ( preferences.namedItem( "pronounceOnLoadMain" ).toElement().text() == "1" );
    c.preferences.pronounceOnLoadPopup = ( preferences.namedItem( "pronounceOnLoadPopup" ).toElement().text() == "1" );

    if ( InternalPlayerBackend::anyAvailable() )
    {
      if ( !preferences.namedItem( "useInternalPlayer" ).isNull() )
        c.preferences.useInternalPlayer = ( preferences.namedItem( "useInternalPlayer" ).toElement().text() == "1" );
    }
    else
      c.preferences.useInternalPlayer = false;

    if ( !preferences.namedItem( "internalPlayerBackend" ).isNull() )
      c.preferences.internalPlayerBackend.setUiName( preferences.namedItem( "internalPlayerBackend" ).toElement().text() );

    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.useSystemProxy = ( proxy.toElement().attribute( "useSystemProxy" ) == "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();
      c.preferences.proxyServer.systemProxyUser = proxy.namedItem( "systemProxyUser" ).toElement().text();
      c.preferences.proxyServer.systemProxyPassword = proxy.namedItem( "systemProxyPassword" ).toElement().text();
    }

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

    if ( !ankiConnectServer.isNull() )
    {
      c.preferences.ankiConnectServer.enabled = ( ankiConnectServer.toElement().attribute( "enabled" ) == "1" );
      c.preferences.ankiConnectServer.host = ankiConnectServer.namedItem( "host" ).toElement().text();
      c.preferences.ankiConnectServer.port = ankiConnectServer.namedItem( "port" ).toElement().text().toULong();
      c.preferences.ankiConnectServer.deck = ankiConnectServer.namedItem( "deck" ).toElement().text();
      c.preferences.ankiConnectServer.model = ankiConnectServer.namedItem( "model" ).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" );

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

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

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

    if ( !preferences.namedItem( "maxStringsInHistory" ).isNull() )
      c.preferences.maxStringsInHistory = preferences.namedItem( "maxStringsInHistory" ).toElement().text().toUInt() ;

    if ( !preferences.namedItem( "storeHistory" ).isNull() )
      c.preferences.storeHistory = preferences.namedItem( "storeHistory" ).toElement().text().toUInt() ;

    if ( !preferences.namedItem( "alwaysExpandOptionalParts" ).isNull() )
      c.preferences.alwaysExpandOptionalParts = preferences.namedItem( "alwaysExpandOptionalParts" ).toElement().text().toUInt() ;

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

    if ( !preferences.namedItem( "historyStoreInterval" ).isNull() )
      c.preferences.historyStoreInterval = preferences.namedItem( "historyStoreInterval" ).toElement().text().toUInt() ;

    if ( !preferences.namedItem( "favoritesStoreInterval" ).isNull() )
      c.preferences.favoritesStoreInterval = preferences.namedItem( "favoritesStoreInterval" ).toElement().text().toUInt() ;

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

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

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

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

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

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

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

    QDomNode fts = preferences.namedItem( "fullTextSearch" );

    if ( !fts.isNull() )
    {
      if ( !fts.namedItem( "searchMode" ).isNull() )
        c.preferences.fts.searchMode = fts.namedItem( "searchMode" ).toElement().text().toInt();

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

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

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

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

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

      if ( !fts.namedItem( "dialogGeometry" ).isNull() )
        c.preferences.fts.dialogGeometry = QByteArray::fromBase64( fts.namedItem( "dialogGeometry" ).toElement().text().toLatin1() );

      if( !fts.namedItem( "disabledTypes" ).isNull() )
      c.preferences.fts.disabledTypes = fts.namedItem( "disabledTypes" ).toElement().text();

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

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

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

      if ( !fts.namedItem( "maxDictionarySize" ).isNull() )
        c.preferences.fts.maxDictionarySize = fts.namedItem( "maxDictionarySize" ).toElement().text().toUInt();
    }

  }

  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" );

  c.popupWindowAlwaysOnTop = ( root.namedItem( "popupWindowAlwaysOnTop" ).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 helpWindowGeometry = root.namedItem( "helpWindowGeometry" );

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

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

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

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

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

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

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

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

  if ( !dictionariesDialogGeometry.isNull() )
    c.dictionariesDialogGeometry = QByteArray::fromBase64( dictionariesDialogGeometry.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( "historyExportPath" ).isNull() )
    c.historyExportPath = root.namedItem( "historyExportPath" ).toElement().text();

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

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

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

  if ( !root.namedItem( "maxPictureWidth" ).isNull() )
    c.maxPictureWidth = root.namedItem( "maxPictureWidth" ).toElement().text().toInt();

  if ( !root.namedItem( "maxHeadwordSize" ).isNull() )
  {
    unsigned int value = root.namedItem( "maxHeadwordSize" ).toElement().text().toUInt();
    if ( value != 0 ) // 0 is invalid value for our purposes
    {
      c.maxHeadwordSize = value;
    }
  }

  if ( !root.namedItem( "maxHeadwordsToExpand" ).isNull() )
    c.maxHeadwordsToExpand = root.namedItem( "maxHeadwordsToExpand" ).toElement().text().toUInt();

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

  if ( !headwordsDialog.isNull() )
  {
    if ( !headwordsDialog.namedItem( "searchMode" ).isNull() )
      c.headwordsDialog.searchMode = headwordsDialog.namedItem( "searchMode" ).toElement().text().toInt();

    if ( !headwordsDialog.namedItem( "matchCase" ).isNull() )
      c.headwordsDialog.matchCase = ( headwordsDialog.namedItem( "matchCase" ).toElement().text() == "1" );

    if ( !headwordsDialog.namedItem( "autoApply" ).isNull() )
      c.headwordsDialog.autoApply = ( headwordsDialog.namedItem( "autoApply" ).toElement().text() == "1" );

    if ( !headwordsDialog.namedItem( "headwordsExportPath" ).isNull() )
      c.headwordsDialog.headwordsExportPath = headwordsDialog.namedItem( "headwordsExportPath" ).toElement().text();

    if ( !headwordsDialog.namedItem( "headwordsDialogGeometry" ).isNull() )
      c.headwordsDialog.headwordsDialogGeometry = QByteArray::fromBase64( headwordsDialog.namedItem( "headwordsDialogGeometry" ).toElement().text().toLatin1() );
  }

  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.favoritesFolder.size() )
  {
    QDomAttr folder = dd.createAttribute( "favoritesFolder" );
    folder.setValue( data.favoritesFolder );
    group.setAttributeNode( folder );
  }

  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::fromLatin1( data.iconData.toBase64() ) );

    group.setAttributeNode( iconData );
  }

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

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

    group.setAttributeNode( shortcut );
  }

  for( QVector< 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 );
  }

  QDomElement muted = dd.createElement( "mutedDictionaries" );
  group.appendChild( muted );

  for( MutedDictionaries::const_iterator i = data.mutedDictionaries.begin();
       i != data.mutedDictionaries.end(); ++i )
  {
    QDomElement dict = dd.createElement( "mutedDictionary" );
    muted.appendChild( dict );

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

  for( MutedDictionaries::const_iterator i = data.popupMutedDictionaries.begin();
       i != data.popupMutedDictionaries.end(); ++i )
  {
    QDomElement dict = dd.createElement( "popupMutedDictionary" );
    muted.appendChild( dict );

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

}

void save( Class const & c ) 
{
  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 );

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

      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( int x = 0; x < c.hunspell.enabledDictionaries.size(); ++x )
    {
      QDomElement en = dd.createElement( "enabled" );
      QDomText value = dd.createTextNode( c.hunspell.enabledDictionaries.at( 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 );

    // Belarusian translit

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

#ifdef MAKE_CHINESE_CONVERSION_SUPPORT
    // Chinese

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

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

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

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

    opt = dd.createElement( "enableTCToSCConversion" );
    opt.appendChild( dd.createTextNode( c.transliteration.chinese.enableTCToSCConversion ? "1":"0" ) );
    chinese.appendChild( opt );
#endif

    // 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 );

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

  {
    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 );

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

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

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

    for( DictServers::const_iterator i = c.dictServers.begin(); i != c.dictServers.end(); ++i )
    {
      QDomElement ds = dd.createElement( "server" );
      dss.appendChild( ds );

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

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

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

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

      QDomAttr databases = dd.createAttribute( "databases" );
      databases.setValue( i->databases );
      ds.setAttributeNode( databases );

      QDomAttr strategies = dd.createAttribute( "strategies" );
      strategies.setValue( i->strategies );
      ds.setAttributeNode( strategies );

      QDomAttr icon = dd.createAttribute( "icon" );
      icon.setValue( i->iconFilename );
      ds.setAttributeNode( icon );
    }
  }

  {
    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 );

      QDomAttr icon = dd.createAttribute( "icon" );
      icon.setValue( i->iconFilename );
      p.setAttributeNode( icon );
    }
  }

  {
    QDomNode ves = dd.createElement( "voiceEngines" );
    root.appendChild( ves );

    for ( VoiceEngines::const_iterator i = c.voiceEngines.begin(); i != c.voiceEngines.end(); ++i )
    {
      QDomElement v = dd.createElement( "voiceEngine" );
      ves.appendChild( v );

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

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

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

      QDomAttr icon = dd.createAttribute( "icon" );
      icon.setValue( i->iconFilename );
      v.setAttributeNode( icon );

      QDomAttr volume = dd.createAttribute( "volume" );
      volume.setValue( QString::number( i->volume ) );
      v.setAttributeNode( volume );

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

  {
    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( "webFontFamily" );
    opt.appendChild( dd.createTextNode( c.preferences.webFontFamily ) );
    preferences.appendChild( opt );

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

    opt = dd.createElement( "autoScrollToTargetArticle" );
    opt.appendChild( dd.createTextNode( c.preferences.autoScrollToTargetArticle ? "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( "helpZoomFactor" );
    opt.appendChild( dd.createTextNode( QString::number( c.preferences.helpZoomFactor ) ) );
    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( "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( "ignoreOwnClipboardChanges" );
    opt.appendChild( dd.createTextNode( c.preferences.ignoreOwnClipboardChanges ? "1":"0" ) );
    preferences.appendChild( opt );

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

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

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

#ifdef HAVE_X11
    opt = dd.createElement( "trackClipboardScan" );
    opt.appendChild( dd.createTextNode( c.preferences.trackClipboardScan ? "1":"0" ) );
    preferences.appendChild( opt );

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

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

    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( "useInternalPlayer" );
    opt.appendChild( dd.createTextNode( c.preferences.useInternalPlayer ? "1" : "0" ) );
    preferences.appendChild( opt );

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

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

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

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

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

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

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

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

      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( "systemProxyUser" );
      opt.appendChild( dd.createTextNode( c.preferences.proxyServer.systemProxyUser ) );
      proxy.appendChild( opt );

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

    //anki connect
    {
      QDomElement proxy = dd.createElement( "ankiConnectServer" );
      preferences.appendChild( proxy );

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

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

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

      opt = dd.createElement( "deck" );
      opt.appendChild( dd.createTextNode( c.preferences.ankiConnectServer.deck ) );
      proxy.appendChild( opt );

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    {
      QDomNode hd = dd.createElement( "fullTextSearch" );
      preferences.appendChild( hd );

      QDomElement opt = dd.createElement( "searchMode" );
      opt.appendChild( dd.createTextNode( QString::number( c.preferences.fts.searchMode ) ) );
      hd.appendChild( opt );

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

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

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

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

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

      opt = dd.createElement( "dialogGeometry" );
      opt.appendChild( dd.createTextNode( QString::fromLatin1( c.preferences.fts.dialogGeometry.toBase64() ) ) );
      hd.appendChild( opt );

      opt = dd.createElement( "disabledTypes" );
      opt.appendChild( dd.createTextNode( c.preferences.fts.disabledTypes ) );
      hd.appendChild( opt );

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

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

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

      opt = dd.createElement( "maxDictionarySize" );
      opt.appendChild( dd.createTextNode( QString::number( c.preferences.fts.maxDictionarySize ) ) );
      hd.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( "popupWindowAlwaysOnTop" );
    opt.appendChild( dd.createTextNode( c.popupWindowAlwaysOnTop ? "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( "helpWindowGeometry" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.helpWindowGeometry.toBase64() ) ) );
    root.appendChild( opt );

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

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

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

    opt = dd.createElement( "dictionariesDialogGeometry" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.dictionariesDialogGeometry.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 );

    if( !c.historyExportPath.isEmpty() )
    {
        opt = dd.createElement( "historyExportPath" );
        opt.appendChild( dd.createTextNode( c.historyExportPath ) );
        root.appendChild( opt );
    }

    if( !c.resourceSavePath.isEmpty() )
    {
        opt = dd.createElement( "resourceSavePath" );
        opt.appendChild( dd.createTextNode( c.resourceSavePath ) );
        root.appendChild( opt );
    }

    if( !c.articleSavePath.isEmpty() )
    {
        opt = dd.createElement( "articleSavePath" );
        opt.appendChild( dd.createTextNode( c.articleSavePath ) );
        root.appendChild( opt );
    }

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

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

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

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

  {
    QDomNode hd = dd.createElement( "headwordsDialog" );
    root.appendChild( hd );

    QDomElement opt = dd.createElement( "searchMode" );
    opt.appendChild( dd.createTextNode( QString::number( c.headwordsDialog.searchMode ) ) );
    hd.appendChild( opt );

    opt = dd.createElement( "matchCase" );
    opt.appendChild( dd.createTextNode( c.headwordsDialog.matchCase ? "1" : "0" ) );
    hd.appendChild( opt );

    opt = dd.createElement( "autoApply" );
    opt.appendChild( dd.createTextNode( c.headwordsDialog.autoApply ? "1" : "0" ) );
    hd.appendChild( opt );

    opt = dd.createElement( "headwordsExportPath" );
    opt.appendChild( dd.createTextNode( c.headwordsDialog.headwordsExportPath ) );
    hd.appendChild( opt );

    opt = dd.createElement( "headwordsDialogGeometry" );
    opt.appendChild( dd.createTextNode( QString::fromLatin1( c.headwordsDialog.headwordsDialogGeometry.toBase64() ) ) );
    hd.appendChild( opt );
  }

  QByteArray result( dd.toByteArray() );

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

  configFile.close();

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

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

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

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

#ifdef XDG_BASE_DIRECTORY_COMPLIANCE
  // store index in XDG_CACHE_HOME in non-portable version
  // *and* when an old index directory in GoldenDict home doesn't exist
  if ( !isPortableVersion() && !result.exists( "index" ) )
  {
    result.setPath( getCacheDir() );
  }
#endif

  result.mkpath( "index" );

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

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

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

QString getHistoryFileName() 
{
  QString homeHistoryPath = getHomeDir().filePath( "history" );

#ifdef XDG_BASE_DIRECTORY_COMPLIANCE
  // use separate data dir for history, if it is not already stored alongside
  // configuration in non-portable mode
  if ( !isPortableVersion() && !QFile::exists( homeHistoryPath ) )
  {
    return getDataDir().filePath( "history" );
  }
#endif

  return homeHistoryPath;
}

QString getFavoritiesFileName() 
{
  return getHomeDir().filePath( "favorites" );
}

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

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

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

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

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

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

QString getHelpDir() noexcept
{
  if ( QDir( getProgramDataDir() ).cd( "help" ) )
    return getProgramDataDir() + "/help";
  else
    return QCoreApplication::applicationDirPath() + "/help";
}

#ifdef MAKE_CHINESE_CONVERSION_SUPPORT
QString getOpenCCDir() noexcept
{
#if defined( Q_OS_WIN )
  if ( QDir( "opencc" ).exists() )
    return "opencc";
  else
    return QCoreApplication::applicationDirPath() + "/opencc";
#elif defined( Q_OS_MAC )
  QString path = QCoreApplication::applicationDirPath() + "/opencc";
  if ( QDir( path ).exists() )
    return path;

  return QString();
#else
  return QString();
#endif
}
#endif

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

    IsPortable(): isPortable( QFileInfo( portableHomeDirPath() ).isDir() )
    {}
  };

  static IsPortable p;

  return p.isPortable;
}

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

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

QString getStylesDir()
{
  QDir result = getHomeDir();

  result.mkpath( "styles" );

  if ( !result.cd( "styles" ) )
    return QString();

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

QString getCacheDir() noexcept
{
  return isPortableVersion() ? portableHomeDirPath() + "/cache"
  #ifdef HAVE_X11
                             : QStandardPaths::writableLocation( QStandardPaths::GenericCacheLocation ) + "/goldendict";
  #else
                             : QStandardPaths::writableLocation( QStandardPaths::CacheLocation );
  #endif
}

QString getNetworkCacheDir() noexcept
{
  return getCacheDir() + "/network";
}

}
