/* 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 ),
    word("word"),
    text("selected_text"),
    sentence("marked_sentence")
{
}

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;

  QString _phase = inputPhrase;
  if( stripClipboard )
  {
    auto parts = inputPhrase.split( QChar::LineFeed, Qt::SkipEmptyParts );
    if( !parts.empty() )
    {
      _phase = parts[ 0 ];
    }
  }

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

  const QString withPunct = _phase.simplified().remove( QChar( 0xAD ) ); // Simplify whitespaces and remove soft hyphens;
  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 ),
  darkMode( false ),
  darkReaderMode ( 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 ),
  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 ),
  stripClipboard( false ),
  raiseWindowOnSearch(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 lingua = root.namedItem("lingua");

  if(!lingua.isNull()){
    applyBoolOption(c.lingua.enable,lingua.namedItem("enable"));
    c.lingua.languageCodes = lingua.namedItem("languageCodes").toElement().text();
  }


  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.engine_name  = ve.attribute( "engine_name" );
      v.name         = ve.attribute( "name" );
      v.voice_name   = ve.attribute( "voice_name" );
      v.locale       = QLocale( ve.attribute( "locale" ) );
      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", "0" ).toInt();
      if ( ( v.rate < -10 ) || ( v.rate > 10 ) ) {
        v.rate = 0;
      }
      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( "darkMode" ).isNull() )
      c.preferences.darkMode = ( preferences.namedItem( "darkMode" ).toElement().text() == "1" );

    if ( !preferences.namedItem("darkReaderMode").isNull())
      c.preferences.darkReaderMode = (preferences.namedItem("darkReaderMode").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" );

    if ( !preferences.namedItem( "sessionCollapse" ).isNull() ) {
      c.preferences.sessionCollapse = ( preferences.namedItem( "sessionCollapse" ).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().toInt();
      c.preferences.ankiConnectServer.deck = ankiConnectServer.namedItem( "deck" ).toElement().text();
      c.preferences.ankiConnectServer.model = ankiConnectServer.namedItem( "model" ).toElement().text();

      c.preferences.ankiConnectServer.word = ankiConnectServer.namedItem( "word" ).toElement().text();
      c.preferences.ankiConnectServer.text = ankiConnectServer.namedItem( "text" ).toElement().text();
      c.preferences.ankiConnectServer.sentence = ankiConnectServer.namedItem( "sentence" ).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( "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" );

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

    if( !preferences.namedItem( "raiseWindowOnSearch" ).isNull() )
      c.preferences.raiseWindowOnSearch = ( preferences.namedItem( "raiseWindowOnSearch" ).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 );
  }

  {
    // Lingua

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

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

    opt = dd.createElement( "languageCodes" );
    opt.appendChild( dd.createTextNode( c.lingua.languageCodes ) );
    lingua.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( const auto & voiceEngine : c.voiceEngines ) {
      QDomElement v = dd.createElement( "voiceEngine" );
      ves.appendChild( v );

      QDomAttr id = dd.createAttribute( "engine_name" );
      id.setValue( voiceEngine.engine_name );
      v.setAttributeNode( id );

      QDomAttr locale = dd.createAttribute( "locale" );
      locale.setValue( voiceEngine.locale.name() );
      v.setAttributeNode( locale );

      QDomAttr name = dd.createAttribute( "name" );
      name.setValue( voiceEngine.name );
      v.setAttributeNode( name );

      QDomAttr voice_name = dd.createAttribute( "voice_name" );
      voice_name.setValue( voiceEngine.voice_name );
      v.setAttributeNode( voice_name );

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

      QDomAttr icon = dd.createAttribute( "icon" );
      icon.setValue( voiceEngine.iconFilename );
      v.setAttributeNode( icon );

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

      QDomAttr rate = dd.createAttribute( "rate" );
      rate.setValue( QString::number( voiceEngine.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( "darkMode" );
    opt.appendChild( dd.createTextNode( c.preferences.darkMode ? "1":"0" ) );
    preferences.appendChild( opt );

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

    opt = dd.createElement( "sessionCollapse" );
    opt.appendChild( dd.createTextNode( c.preferences.sessionCollapse ? "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( "text" );
      opt.appendChild( dd.createTextNode( c.preferences.ankiConnectServer.text ) );
      proxy.appendChild( opt );

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

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

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

    opt = dd.createElement( "raiseWindowOnSearch" );
    opt.appendChild( dd.createTextNode( c.preferences.raiseWindowOnSearch ? "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";
}

}