#include "AppHelper.h"

// http://qt-project.org/doc/qt-5/qdir.html#setSearchPaths

// http://qt-project.org/doc/qt-5/resources.html

struct QSettingGroup

{

QSettingGroup( QSettings & config , const QString & group ) : settings( config )

{

settings.beginGroup( group );

}

template< typename T > T Value( const QString & Key , const QVariant & Def = QVariant( ) )

{

return settings.value( Key , Def ).value< T >( );

}

~QSettingGroup( ) { settings.endGroup( ); }

QSettings & settings;

};

struct QSplashArgs

{

explicit QSplashArgs( ) : splashScreen( NULL ){ }

QSplashScreen * splashScreen ;

QString splashImageFile ;

};

static QSplashArgs & splashArgs( )

{

static QSplashArgs splashArgs;

return splashArgs ;

}

QString & dirExpand( QString & path )

{

static QString appDir , binary , config ;

if( appDir.isEmpty( ) || appDir.isNull( ) )

{

binary = QCoreApplication::applicationDirPath( );

appDir = QDir( binary + "/.." ).canonicalPath( );

config = appDir + "/etc" ;

}

path.replace( "$(AppDir)" , appDir );

path.replace( "$(Binary)" , binary );

path.replace( "$(Config)" , config );

return path;

}

QString dirExpand( const char * path ){ return dirExpand( QString( path ) ); }

QStringList & dirExpand( QStringList & pathList )

{

QStringList::iterator itr = pathList.begin( );

for( ; itr != pathList.end( ) ; itr ++ )

{

dirExpand( * itr );

}

return pathList ;

}

static void initResourceSearch( QSettings & settings )

{

QSettingGroup config( settings , "Search" );

QStringList resDirs = settings.childKeys( );

foreach( const QString & resDir , resDirs )

{

QStringList resPaths = config.Value< QStringList >( resDir );

QDir::setSearchPaths( resDir , dirExpand( resPaths ) );

}

}

static void initResourceFiles( QSettings & settings )

{

QSettingGroup config( settings , "Resource" );

QStringList resPaths = settings.childKeys( );

foreach( const QString & resRoot , resPaths )

{

QString resFile = config.Value< QString >( resRoot );

regResource( resFile , resRoot );

}

}

static void initPluginsPaths( QSettings & settings )

{

QSettingGroup config( settings , "Plugins" );

QStringList dirLibraries = config.Value< QStringList >( "Path" );

qApp->setLibraryPaths( dirExpand( dirLibraries ) + qApp->libraryPaths( ) );

}

static void initAppSettings( QSettings & settings )

{

QSettingGroup config( settings , "Application" );

// initialize resource file

QString resFile = QCoreApplication::applicationFilePath( );

resFile.replace( ".exe" , ".rcc" , Qt::CaseInsensitive );

QResource::registerResource( resFile );

// initialize Locale Codec

QByteArray codec = config.Value< QByteArray >( "LocaleCodec" , "GB18030" );

QTextCodec::setCodecForLocale( QTextCodec::codecForName( codec ) );

// install language translator

addTranslator( config.Value< QString >( "Language" , "zh_CN" ) );

// initialize skin styles

setSkinStyles( config.Value< QString >( "Theme" , "Default" ) );

}

static QString getString( QStringList & list , int index , const QString & def = QString( ) )

{

return list.size( ) > index ? list[ index ] : def ;

}

static void initSplashArgs( QSettings & settings )

{

QSettingGroup config( settings , "Splash" );

QSplashArgs & Args = splashArgs( );

Args.splashImageFile = config.Value< QString >( "Image" , "Splash.png" );

}

void initializeApplication( void )

{

QString appFile = QCoreApplication::applicationFilePath( );

appFile.replace( ".exe" , ".ini" , Qt::CaseInsensitive );

QDir::setCurrent( dirExpand( QString( "$(AppDir)" ) ) );

QSettings config( appFile , QSettings::IniFormat );

QDir::setCurrent( dirExpand( "$(AppDir)" ) );

initResourceSearch( config );

initResourceFiles( config );

initPluginsPaths( config );

initAppSettings( config );

initSplashArgs( config );

}

void addTranslator( const QString & Name )

{

QTranslator * translator = new QTranslator( 0 );

translator->load( QString( "lang:" ) + Name + ".lang" );

qApp->installTranslator( translator );

}

void setSkinStyles( const QString & Name )

{

QFile skinFile( QString( "skin:" ) + Name + ".skin" );

skinFile.open( QFile::ReadOnly | QFile::Unbuffered );

qApp->setStyleSheet( skinFile.readAll( ) );

skinFile.close( );

}

void regResource( const QString & Name , const QString & Root )

{

QString name( Name ), root( Root );

if( root[ 0 ] == ':' ){ root[ 0 ] = '/' ; }

if( root[ 0 ] == '$' ){ root[ 0 ] = '/' ; }

if( root[ 0 ] == '@' ){ root[ 0 ] = '/' ; }

if( root[ 0 ] != '/' ){ root.insert( 0 , '/' ); }

QResource::registerResource( dirExpand( name ) , root );

}

struct QSplash : public QSplashScreen

{

void closeEvent( QCloseEvent * event );

explicit QSplash( );

};

void QSplash::closeEvent( QCloseEvent * event )

{

QSplashScreen::closeEvent( event );

splashArgs( ).splashScreen = NULL;

}

QSplash::QSplash( ) : QSplashScreen( QPixmap( splashArgs( ).splashImageFile ) )

{

}

void splashInit( void )

{

if( splashArgs( ).splashScreen != NULL ) return;

if( QSplashScreen * splash = new QSplash( ) )

{

splashArgs( ).splashScreen = splash;

splash->show( );

}

}

void splashShow( const QString & text , const QColor & color )

{

if( QSplashScreen * splash = splashArgs( ).splashScreen )

{

splash->showMessage( text , Qt::AlignCenter , color );

qApp->processEvents( );

}

}

void splashFini( QWidget & mainWidget )

{

if( QSplashScreen * splash = splashArgs( ).splashScreen )

{

splash->finish( & mainWidget );

}

}

void splashHide( void )

{

if( QSplashScreen * splash = splashArgs( ).splashScreen )

{

splashArgs( ).splashScreen = NULL ;

splash->deleteLater( );

splash->close( );

}

}